Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1 | /* drivers/usb/function/msm_hsusb.c |
| 2 | * |
| 3 | * Driver for HighSpeed USB Client Controller in MSM7K |
| 4 | * |
| 5 | * Copyright (C) 2007 Google, Inc. |
| 6 | * Copyright (c) 2008-2009, Code Aurora Forum. All rights reserved. |
| 7 | * Author: Brian Swetland <swetland@google.com> |
| 8 | * |
| 9 | * This software is licensed under the terms of the GNU General Public |
| 10 | * License version 2, as published by the Free Software Foundation, and |
| 11 | * may be copied, distributed, and modified under those terms. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | */ |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/kernel.h> |
| 22 | #include <linux/list.h> |
| 23 | |
| 24 | #include <linux/delay.h> |
| 25 | #include <linux/interrupt.h> |
| 26 | #include <linux/dma-mapping.h> |
| 27 | #include <linux/dmapool.h> |
| 28 | #include <linux/platform_device.h> |
| 29 | #include <linux/debugfs.h> |
| 30 | #include <linux/workqueue.h> |
| 31 | #include <linux/clk.h> |
| 32 | #include <linux/spinlock.h> |
| 33 | #include <linux/switch.h> |
| 34 | |
| 35 | #include <linux/usb/ch9.h> |
| 36 | #include <linux/io.h> |
| 37 | |
| 38 | #include <asm/mach-types.h> |
| 39 | #include <mach/vreg.h> |
| 40 | #include <mach/board.h> |
| 41 | #include <mach/msm_hsusb.h> |
| 42 | #include <mach/rpc_hsusb.h> |
| 43 | #include <mach/rpc_pmapp.h> |
| 44 | #include <mach/gpio.h> |
| 45 | #include <mach/msm_hsusb_hw.h> |
| 46 | #include <mach/msm_otg.h> |
| 47 | #include <linux/wakelock.h> |
| 48 | #include <linux/pm_qos_params.h> |
| 49 | #include <mach/clk.h> |
| 50 | |
| 51 | #define MSM_USB_BASE ((unsigned) ui->addr) |
| 52 | |
| 53 | #include "usb_function.h" |
| 54 | |
| 55 | #define EPT_FLAG_IN 0x0001 |
| 56 | #define USB_DIR_MASK USB_DIR_IN |
| 57 | #define SETUP_BUF_SIZE 4096 |
| 58 | |
| 59 | /* IDs for string descriptors */ |
| 60 | #define STRING_LANGUAGE_ID 0 |
| 61 | #define STRING_SERIAL 1 |
| 62 | #define STRING_PRODUCT 2 |
| 63 | #define STRING_MANUFACTURER 3 |
| 64 | |
| 65 | #define LANGUAGE_ID 0x0409 /* en-US */ |
| 66 | #define SOC_ROC_2_0 0x10002 /* ROC 2.0 */ |
| 67 | |
| 68 | #define TRUE 1 |
| 69 | #define FALSE 0 |
| 70 | #define USB_LINK_RESET_TIMEOUT (msecs_to_jiffies(10)) |
| 71 | #define USB_CHG_DET_DELAY msecs_to_jiffies(1000) |
| 72 | |
| 73 | #define is_phy_45nm() (PHY_MODEL(ui->phy_info) == USB_PHY_MODEL_45NM) |
| 74 | #define is_phy_external() (PHY_TYPE(ui->phy_info) == USB_PHY_EXTERNAL) |
| 75 | |
| 76 | static int pid = 0x9018; |
| 77 | |
| 78 | struct usb_fi_ept { |
| 79 | struct usb_endpoint *ept; |
| 80 | struct usb_endpoint_descriptor desc; |
| 81 | }; |
| 82 | |
| 83 | struct usb_function_info { |
| 84 | struct list_head list; |
| 85 | unsigned enabled; |
| 86 | struct usb_function *func; |
| 87 | }; |
| 88 | |
| 89 | struct msm_request { |
| 90 | struct usb_request req; |
| 91 | |
| 92 | struct usb_info *ui; |
| 93 | struct msm_request *next; |
| 94 | |
| 95 | unsigned busy:1; |
| 96 | unsigned live:1; |
| 97 | unsigned alloced:1; |
| 98 | unsigned dead:1; |
| 99 | |
| 100 | dma_addr_t dma; |
| 101 | |
| 102 | struct ept_queue_item *item; |
| 103 | dma_addr_t item_dma; |
| 104 | }; |
| 105 | static unsigned char str_lang_desc[] = {4, |
| 106 | USB_DT_STRING, |
| 107 | (unsigned char)LANGUAGE_ID, |
| 108 | (unsigned char)(LANGUAGE_ID >> 8)}; |
| 109 | |
| 110 | #define to_msm_request(r) container_of(r, struct msm_request, req) |
| 111 | static int usb_hw_reset(struct usb_info *ui); |
| 112 | static void usb_vbus_online(struct usb_info *); |
| 113 | static void usb_vbus_offline(struct usb_info *ui); |
| 114 | static void usb_lpm_exit(struct usb_info *ui); |
| 115 | static void usb_lpm_wakeup_phy(struct work_struct *); |
| 116 | static void usb_exit(void); |
| 117 | static int usb_is_online(struct usb_info *ui); |
| 118 | static void usb_do_work(struct work_struct *w); |
| 119 | static int usb_lpm_enter(struct usb_info *ui); |
| 120 | int (*usb_lpm_config_gpio)(int); |
| 121 | static void usb_enable_pullup(struct usb_info *ui); |
| 122 | static void usb_disable_pullup(struct usb_info *ui); |
| 123 | |
| 124 | static struct workqueue_struct *usb_work; |
| 125 | static void usb_chg_stop(struct work_struct *w); |
| 126 | |
| 127 | #define USB_STATE_IDLE 0 |
| 128 | #define USB_STATE_ONLINE 1 |
| 129 | #define USB_STATE_OFFLINE 2 |
| 130 | |
| 131 | #define USB_FLAG_START 0x0001 |
| 132 | #define USB_FLAG_VBUS_ONLINE 0x0002 |
| 133 | #define USB_FLAG_VBUS_OFFLINE 0x0004 |
| 134 | #define USB_FLAG_RESET 0x0008 |
| 135 | #define USB_FLAG_SUSPEND 0x0010 |
| 136 | #define USB_FLAG_CONFIGURE 0x0020 |
| 137 | #define USB_FLAG_RESUME 0x0040 |
| 138 | #define USB_FLAG_REG_OTG 0x0080 |
| 139 | |
| 140 | #define USB_MSC_ONLY_FUNC_MAP 0x10 |
| 141 | #define DRIVER_NAME "msm_hsusb_peripheral" |
| 142 | |
| 143 | struct lpm_info { |
| 144 | struct work_struct wakeup_phy; |
| 145 | }; |
| 146 | |
| 147 | enum charger_type { |
| 148 | USB_CHG_TYPE__SDP, |
| 149 | USB_CHG_TYPE__CARKIT, |
| 150 | USB_CHG_TYPE__WALLCHARGER, |
| 151 | USB_CHG_TYPE__INVALID |
| 152 | }; |
| 153 | |
| 154 | struct usb_info { |
| 155 | /* lock for register/queue/device state changes */ |
| 156 | spinlock_t lock; |
| 157 | |
| 158 | /* single request used for handling setup transactions */ |
| 159 | struct usb_request *setup_req; |
| 160 | struct usb_request *ep0out_req; |
| 161 | |
| 162 | struct platform_device *pdev; |
| 163 | struct msm_hsusb_platform_data *pdata; |
| 164 | int irq; |
| 165 | int gpio_irq[2]; |
| 166 | void *addr; |
| 167 | |
| 168 | unsigned state; |
| 169 | unsigned flags; |
| 170 | |
| 171 | unsigned online; |
| 172 | unsigned running; |
| 173 | unsigned bound; |
| 174 | |
| 175 | struct dma_pool *pool; |
| 176 | |
| 177 | /* dma page to back the queue heads and items */ |
| 178 | unsigned char *buf; |
| 179 | dma_addr_t dma; |
| 180 | |
| 181 | struct ept_queue_head *head; |
| 182 | |
| 183 | /* used for allocation */ |
| 184 | unsigned next_item; |
| 185 | unsigned next_ifc_num; |
| 186 | unsigned stopped:1; |
| 187 | unsigned remote_wakeup:1; |
| 188 | unsigned configured:1; |
| 189 | unsigned selfpowered:1; |
| 190 | unsigned iad:1; |
| 191 | unsigned char maxpower; |
| 192 | enum usb_device_speed speed; |
| 193 | unsigned phy_info; |
| 194 | |
| 195 | /* endpoints are ordered based on their status bits, |
| 196 | ** so they are OUT0, OUT1, ... OUT15, IN0, IN1, ... IN15 |
| 197 | */ |
| 198 | struct usb_endpoint ept[32]; |
| 199 | |
| 200 | struct delayed_work work; |
| 201 | struct delayed_work chg_legacy_det; |
| 202 | unsigned phy_status; |
| 203 | unsigned phy_fail_count; |
| 204 | struct usb_composition *composition; |
| 205 | |
| 206 | struct usb_function_info **func; |
| 207 | unsigned num_funcs; |
| 208 | struct usb_function_map *functions_map; |
| 209 | |
| 210 | #define MAX_INTERFACE_NUM 15 |
| 211 | struct usb_function *func2ifc_map[MAX_INTERFACE_NUM]; |
| 212 | |
| 213 | #define ep0out ept[0] |
| 214 | #define ep0in ept[16] |
| 215 | |
| 216 | struct clk *clk; |
| 217 | struct clk *pclk; |
| 218 | struct clk *cclk; |
| 219 | unsigned int clk_enabled; |
| 220 | |
| 221 | struct vreg *vreg; |
| 222 | unsigned int vreg_enabled; |
| 223 | |
| 224 | unsigned in_lpm; |
| 225 | struct lpm_info li; |
| 226 | |
| 227 | enum charger_type chg_type; |
| 228 | struct work_struct chg_stop; |
| 229 | #define MAX_STRDESC_NUM 100 |
| 230 | char **strdesc; |
| 231 | int strdesc_index; |
| 232 | |
| 233 | u16 test_mode; |
| 234 | struct wake_lock wlock; |
| 235 | struct msm_otg_transceiver *xceiv; |
| 236 | int active; |
| 237 | enum usb_device_state usb_state; |
| 238 | int vbus_sn_notif; |
| 239 | struct switch_dev sdev; |
| 240 | }; |
| 241 | static struct usb_info *the_usb_info; |
| 242 | |
| 243 | static unsigned short usb_validate_product_id(unsigned short pid); |
| 244 | static unsigned short usb_get_product_id(unsigned long enabled_functions); |
| 245 | static void usb_switch_composition(unsigned short pid); |
| 246 | static unsigned short usb_set_composition(unsigned short pid); |
| 247 | static void usb_configure_device_descriptor(struct usb_info *ui); |
| 248 | static void usb_uninit(struct usb_info *ui); |
| 249 | |
| 250 | static unsigned ulpi_read(struct usb_info *ui, unsigned reg); |
| 251 | static int ulpi_write(struct usb_info *ui, unsigned val, unsigned reg); |
| 252 | |
| 253 | |
| 254 | |
| 255 | struct usb_device_descriptor desc_device = { |
| 256 | .bLength = USB_DT_DEVICE_SIZE, |
| 257 | .bDescriptorType = USB_DT_DEVICE, |
| 258 | .bcdUSB = 0x0200, |
| 259 | .bDeviceClass = 0, |
| 260 | .bDeviceSubClass = 0, |
| 261 | .bDeviceProtocol = 0, |
| 262 | .bMaxPacketSize0 = 64, |
| 263 | /* the following fields are filled in by usb_probe */ |
| 264 | .idVendor = 0, |
| 265 | .idProduct = 0, |
| 266 | .bcdDevice = 0, |
| 267 | .iManufacturer = 0, |
| 268 | .iProduct = 0, |
| 269 | .iSerialNumber = 0, |
| 270 | .bNumConfigurations = 1, |
| 271 | }; |
| 272 | |
| 273 | static void flush_endpoint(struct usb_endpoint *ept); |
| 274 | static void msm_hsusb_suspend_locks_acquire(struct usb_info *, int); |
| 275 | |
| 276 | static ssize_t print_switch_name(struct switch_dev *sdev, char *buf) |
| 277 | { |
| 278 | return sprintf(buf, "%s\n", DRIVER_NAME); |
| 279 | } |
| 280 | |
| 281 | static ssize_t print_switch_state(struct switch_dev *sdev, char *buf) |
| 282 | { |
| 283 | struct usb_info *ui = the_usb_info; |
| 284 | |
| 285 | return sprintf(buf, "%s\n", (ui->online ? "online" : "offline")); |
| 286 | } |
| 287 | |
| 288 | #define USB_WALLCHARGER_CHG_CURRENT 1800 |
| 289 | static int usb_get_max_power(struct usb_info *ui) |
| 290 | { |
| 291 | unsigned long flags; |
| 292 | enum charger_type temp; |
| 293 | int suspended; |
| 294 | int configured; |
| 295 | |
| 296 | spin_lock_irqsave(&ui->lock, flags); |
| 297 | temp = ui->chg_type; |
| 298 | suspended = ui->usb_state == USB_STATE_SUSPENDED ? 1 : 0; |
| 299 | configured = ui->configured; |
| 300 | spin_unlock_irqrestore(&ui->lock, flags); |
| 301 | |
| 302 | if (temp == USB_CHG_TYPE__INVALID) |
| 303 | return -ENODEV; |
| 304 | |
| 305 | if (temp == USB_CHG_TYPE__WALLCHARGER) |
| 306 | return USB_WALLCHARGER_CHG_CURRENT; |
| 307 | |
| 308 | if (suspended || !configured) |
| 309 | return 0; |
| 310 | |
| 311 | return ui->maxpower * 2; |
| 312 | } |
| 313 | |
| 314 | static void usb_chg_legacy_detect(struct work_struct *w) |
| 315 | { |
| 316 | struct usb_info *ui = the_usb_info; |
| 317 | unsigned long flags; |
| 318 | enum charger_type temp = USB_CHG_TYPE__INVALID; |
| 319 | int maxpower; |
| 320 | int ret = 0; |
| 321 | |
| 322 | spin_lock_irqsave(&ui->lock, flags); |
| 323 | |
| 324 | if (ui->usb_state == USB_STATE_NOTATTACHED) { |
| 325 | ret = -ENODEV; |
| 326 | goto chg_legacy_det_out; |
| 327 | } |
| 328 | |
| 329 | if ((readl(USB_PORTSC) & PORTSC_LS) == PORTSC_LS) { |
| 330 | ui->chg_type = temp = USB_CHG_TYPE__WALLCHARGER; |
| 331 | goto chg_legacy_det_out; |
| 332 | } |
| 333 | |
| 334 | ui->chg_type = temp = USB_CHG_TYPE__SDP; |
| 335 | chg_legacy_det_out: |
| 336 | spin_unlock_irqrestore(&ui->lock, flags); |
| 337 | |
| 338 | if (ret) |
| 339 | return; |
| 340 | |
| 341 | msm_chg_usb_charger_connected(temp); |
| 342 | maxpower = usb_get_max_power(ui); |
| 343 | if (maxpower > 0) |
| 344 | msm_chg_usb_i_is_available(maxpower); |
| 345 | |
| 346 | /* USB driver prevents idle and suspend power collapse(pc) |
| 347 | * while usb cable is connected. But when dedicated charger is |
| 348 | * connected, driver can vote for idle and suspend pc. In order |
| 349 | * to allow pc, driver has to initiate low power mode which it |
| 350 | * cannot do as phy cannot be accessed when dedicated charger |
| 351 | * is connected due to phy lockup issues. Just to allow idle & |
| 352 | * suspend pc when dedicated charger is connected, release the |
| 353 | * wakelock, set driver latency to default and act as if we are |
| 354 | * in low power mode so that, driver will re-acquire wakelocks |
| 355 | * for any sub-sequent usb interrupts. |
| 356 | */ |
| 357 | if (temp == USB_CHG_TYPE__WALLCHARGER) { |
| 358 | pr_info("\n%s: WALL-CHARGER\n", __func__); |
| 359 | spin_lock_irqsave(&ui->lock, flags); |
| 360 | if (ui->usb_state == USB_STATE_NOTATTACHED) { |
| 361 | spin_unlock_irqrestore(&ui->lock, flags); |
| 362 | return; |
| 363 | } |
| 364 | ui->in_lpm = 1; |
| 365 | spin_unlock_irqrestore(&ui->lock, flags); |
| 366 | |
| 367 | msm_hsusb_suspend_locks_acquire(ui, 0); |
| 368 | } else |
| 369 | pr_info("\n%s: Standard Downstream Port\n", __func__); |
| 370 | } |
| 371 | |
| 372 | int usb_msm_get_next_strdesc_id(char *str) |
| 373 | { |
| 374 | struct usb_info *ui = the_usb_info; |
| 375 | unsigned id; |
| 376 | unsigned long flags; |
| 377 | int len; |
| 378 | |
| 379 | len = strlen(str); |
| 380 | if (!len) { |
| 381 | printk(KERN_ERR "usb next_strdesc_id(); null string\n"); |
| 382 | return -EPERM; |
| 383 | } |
| 384 | /* for null character */ |
| 385 | len = len + 1; |
| 386 | |
| 387 | spin_lock_irqsave(&ui->lock, flags); |
| 388 | |
| 389 | id = ui->strdesc_index; |
| 390 | if (id >= MAX_STRDESC_NUM) { |
| 391 | id = -EPERM; |
| 392 | printk(KERN_ERR "reached max strdesc number\n"); |
| 393 | goto get_strd_id_exit; |
| 394 | } |
| 395 | |
| 396 | ui->strdesc[id] = kmalloc(len, GFP_ATOMIC); |
| 397 | if (ui->strdesc[id]) { |
| 398 | memcpy(ui->strdesc[id], str, len); |
| 399 | ui->strdesc_index++; |
| 400 | } else { |
| 401 | id = -EPERM; |
| 402 | printk(KERN_ERR "usb next_strdesc_id(); Out of memory:(%s)\n", |
| 403 | str); |
| 404 | } |
| 405 | |
| 406 | get_strd_id_exit: |
| 407 | spin_unlock_irqrestore(&ui->lock, flags); |
| 408 | return id; |
| 409 | } |
| 410 | EXPORT_SYMBOL(usb_msm_get_next_strdesc_id); |
| 411 | |
| 412 | |
| 413 | inline int usb_msm_is_iad(void) |
| 414 | { |
| 415 | return the_usb_info->iad; |
| 416 | } |
| 417 | EXPORT_SYMBOL(usb_msm_is_iad); |
| 418 | |
| 419 | inline void usb_msm_enable_iad(void) |
| 420 | { |
| 421 | the_usb_info->iad = 1; |
| 422 | } |
| 423 | EXPORT_SYMBOL(usb_msm_enable_iad); |
| 424 | |
| 425 | int usb_msm_get_speed() |
| 426 | { |
| 427 | return the_usb_info->speed; |
| 428 | } |
| 429 | EXPORT_SYMBOL(usb_msm_get_speed); |
| 430 | |
| 431 | int usb_msm_get_next_ifc_number(struct usb_function *driver) |
| 432 | { |
| 433 | struct usb_info *ui = the_usb_info; |
| 434 | int ifc_num = -1; |
| 435 | unsigned long flags; |
| 436 | int i; |
| 437 | |
| 438 | spin_lock_irqsave(&ui->lock, flags); |
| 439 | for (i = 0; i < ui->pdata->num_functions; i++) { |
| 440 | if (strcmp(ui->functions_map[i].name, driver->name)) |
| 441 | continue; |
| 442 | if (!(ui->composition->functions & (1 << i))) |
| 443 | continue; |
| 444 | ifc_num = ui->next_ifc_num++; |
| 445 | ui->func2ifc_map[ifc_num] = driver; |
| 446 | break; |
| 447 | } |
| 448 | spin_unlock_irqrestore(&ui->lock, flags); |
| 449 | return ifc_num; |
| 450 | } |
| 451 | EXPORT_SYMBOL(usb_msm_get_next_ifc_number); |
| 452 | |
| 453 | static inline int usb_msm_get_selfpowered(void) |
| 454 | { |
| 455 | struct usb_info *ui = the_usb_info; |
| 456 | |
| 457 | return ui->selfpowered; |
| 458 | } |
| 459 | static inline int usb_msm_get_remotewakeup(void) |
| 460 | { |
| 461 | struct usb_info *ui = the_usb_info; |
| 462 | |
| 463 | return ui->remote_wakeup; |
| 464 | } |
| 465 | |
| 466 | static void usb_clk_enable(struct usb_info *ui) |
| 467 | { |
| 468 | if (!ui->clk_enabled) { |
| 469 | clk_enable(ui->pclk); |
| 470 | if (ui->cclk) |
| 471 | clk_enable(ui->cclk); |
| 472 | ui->clk_enabled = 1; |
| 473 | } |
| 474 | } |
| 475 | |
| 476 | static void usb_clk_disable(struct usb_info *ui) |
| 477 | { |
| 478 | if (ui->clk_enabled) { |
| 479 | clk_disable(ui->pclk); |
| 480 | if (ui->cclk) |
| 481 | clk_disable(ui->cclk); |
| 482 | ui->clk_enabled = 0; |
| 483 | } |
| 484 | } |
| 485 | |
| 486 | static void usb_vreg_enable(struct usb_info *ui) |
| 487 | { |
| 488 | if (ui->vreg && !IS_ERR(ui->vreg) && !ui->vreg_enabled) { |
| 489 | vreg_enable(ui->vreg); |
| 490 | ui->vreg_enabled = 1; |
| 491 | } |
| 492 | } |
| 493 | |
| 494 | static void usb_vreg_disable(struct usb_info *ui) |
| 495 | { |
| 496 | if (ui->vreg && !IS_ERR(ui->vreg) && ui->vreg_enabled) { |
| 497 | vreg_disable(ui->vreg); |
| 498 | ui->vreg_enabled = 0; |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | static unsigned ulpi_read(struct usb_info *ui, unsigned reg) |
| 503 | { |
| 504 | unsigned timeout = 100000; |
| 505 | |
| 506 | /* initiate read operation */ |
| 507 | writel(ULPI_RUN | ULPI_READ | ULPI_ADDR(reg), |
| 508 | USB_ULPI_VIEWPORT); |
| 509 | |
| 510 | /* wait for completion */ |
| 511 | while ((readl(USB_ULPI_VIEWPORT) & ULPI_RUN) && (--timeout)) ; |
| 512 | |
| 513 | if (timeout == 0) { |
| 514 | printk(KERN_ERR "ulpi_read: timeout %08x\n", |
| 515 | readl(USB_ULPI_VIEWPORT)); |
| 516 | return 0xffffffff; |
| 517 | } |
| 518 | return ULPI_DATA_READ(readl(USB_ULPI_VIEWPORT)); |
| 519 | } |
| 520 | |
| 521 | static int ulpi_write(struct usb_info *ui, unsigned val, unsigned reg) |
| 522 | { |
| 523 | unsigned timeout = 10000; |
| 524 | |
| 525 | /* initiate write operation */ |
| 526 | writel(ULPI_RUN | ULPI_WRITE | |
| 527 | ULPI_ADDR(reg) | ULPI_DATA(val), |
| 528 | USB_ULPI_VIEWPORT); |
| 529 | |
| 530 | /* wait for completion */ |
| 531 | while((readl(USB_ULPI_VIEWPORT) & ULPI_RUN) && (--timeout)) ; |
| 532 | |
| 533 | if (timeout == 0) { |
| 534 | printk(KERN_ERR "ulpi_write: timeout\n"); |
| 535 | return -1; |
| 536 | } |
| 537 | |
| 538 | return 0; |
| 539 | } |
| 540 | |
| 541 | static void msm_hsusb_suspend_locks_acquire(struct usb_info *ui, int acquire) |
| 542 | { |
| 543 | if (acquire) { |
| 544 | wake_lock(&ui->wlock); |
| 545 | pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY, |
| 546 | DRIVER_NAME, ui->pdata->swfi_latency); |
| 547 | /* targets like 7x30 have introduced core clock |
| 548 | * to remove the dependency on max axi frequency |
| 549 | */ |
| 550 | if (!ui->cclk) |
| 551 | pm_qos_update_requirement(PM_QOS_SYSTEM_BUS_FREQ, |
| 552 | DRIVER_NAME, MSM_AXI_MAX_FREQ); |
| 553 | } else { |
| 554 | wake_lock_timeout(&ui->wlock, HZ / 2); |
| 555 | pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY, |
| 556 | DRIVER_NAME, |
| 557 | PM_QOS_DEFAULT_VALUE); |
| 558 | if (!ui->cclk) |
| 559 | pm_qos_update_requirement(PM_QOS_SYSTEM_BUS_FREQ, |
| 560 | DRIVER_NAME, PM_QOS_DEFAULT_VALUE); |
| 561 | } |
| 562 | } |
| 563 | |
| 564 | static void msm_hsusb_suspend_locks_init(struct usb_info *ui, int init) |
| 565 | { |
| 566 | if (init) { |
| 567 | wake_lock_init(&ui->wlock, WAKE_LOCK_SUSPEND, |
| 568 | "usb_bus_active"); |
| 569 | pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY, |
| 570 | DRIVER_NAME, |
| 571 | PM_QOS_DEFAULT_VALUE); |
| 572 | pm_qos_add_requirement(PM_QOS_SYSTEM_BUS_FREQ, |
| 573 | DRIVER_NAME, PM_QOS_DEFAULT_VALUE); |
| 574 | } else { |
| 575 | wake_lock_destroy(&ui->wlock); |
| 576 | pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY, DRIVER_NAME); |
| 577 | pm_qos_remove_requirement(PM_QOS_SYSTEM_BUS_FREQ, DRIVER_NAME); |
| 578 | } |
| 579 | } |
| 580 | |
| 581 | static void init_endpoints(struct usb_info *ui) |
| 582 | { |
| 583 | unsigned n; |
| 584 | |
| 585 | for (n = 0; n < 32; n++) { |
| 586 | struct usb_endpoint *ept = ui->ept + n; |
| 587 | |
| 588 | ept->ui = ui; |
| 589 | ept->bit = n; |
| 590 | ept->num = n & 15; |
| 591 | ept->alloced = 0; |
| 592 | |
| 593 | if (ept->bit > 15) { |
| 594 | /* IN endpoint */ |
| 595 | ept->head = ui->head + (ept->num << 1) + 1; |
| 596 | ept->flags = EPT_FLAG_IN; |
| 597 | } else { |
| 598 | /* OUT endpoint */ |
| 599 | ept->head = ui->head + (ept->num << 1); |
| 600 | ept->flags = 0; |
| 601 | } |
| 602 | } |
| 603 | } |
| 604 | |
| 605 | void usb_configure_endpoint(struct usb_endpoint *ep, |
| 606 | struct usb_endpoint_descriptor *ep_desc) |
| 607 | { |
| 608 | unsigned cfg = 0; |
| 609 | unsigned long flags; |
| 610 | struct usb_info *ui = ep->ui; |
| 611 | |
| 612 | if (!ui) |
| 613 | return; |
| 614 | spin_lock_irqsave(&ui->lock, flags); |
| 615 | |
| 616 | if (ep_desc) { |
| 617 | ep->max_pkt = ep_desc->wMaxPacketSize; |
| 618 | ep->ep_descriptor = ep_desc; |
| 619 | } |
| 620 | |
| 621 | if (!ep->max_pkt) { |
| 622 | printk(KERN_ERR "cannot configure zero length max pkt\n"); |
| 623 | goto cfg_ept_end; |
| 624 | } |
| 625 | |
| 626 | cfg = CONFIG_MAX_PKT(ep->max_pkt) | CONFIG_ZLT; |
| 627 | /* ep0 out needs interrupt-on-setup */ |
| 628 | if (ep->bit == 0) |
| 629 | cfg |= CONFIG_IOS; |
| 630 | ep->head->config = cfg; |
| 631 | ep->head->next = TERMINATE; |
| 632 | |
| 633 | pr_debug("ept #%d %s max:%d head:%p bit:%d\n", |
| 634 | ep->num, |
| 635 | (ep->flags & EPT_FLAG_IN) ? "in" : "out", |
| 636 | ep->max_pkt, ep->head, ep->bit); |
| 637 | |
| 638 | cfg_ept_end: |
| 639 | spin_unlock_irqrestore(&ui->lock, flags); |
| 640 | } |
| 641 | EXPORT_SYMBOL(usb_configure_endpoint); |
| 642 | |
| 643 | #define NUM_EPTS 15 /* number of in or out non-ctrl endpoints */ |
| 644 | struct usb_endpoint *usb_alloc_endpoint(unsigned direction) |
| 645 | { |
| 646 | struct usb_info *ui = the_usb_info; |
| 647 | struct usb_endpoint *ept = NULL; |
| 648 | int i; |
| 649 | unsigned long flags; |
| 650 | |
| 651 | spin_lock_irqsave(&ui->lock, flags); |
| 652 | if (direction & USB_DIR_IN) |
| 653 | ept = (&ui->ep0in); |
| 654 | else |
| 655 | ept = (&ui->ep0out); |
| 656 | |
| 657 | for (i = 0; i < NUM_EPTS; i++) { |
| 658 | ept++; |
| 659 | if (!ept->alloced) { |
| 660 | ept->alloced = 1; |
| 661 | ept->ui = ui; |
| 662 | spin_unlock_irqrestore(&ui->lock, flags); |
| 663 | return ept; |
| 664 | } |
| 665 | } |
| 666 | spin_unlock_irqrestore(&ui->lock, flags); |
| 667 | |
| 668 | return NULL; |
| 669 | } |
| 670 | EXPORT_SYMBOL(usb_alloc_endpoint); |
| 671 | |
| 672 | int usb_free_endpoint(struct usb_endpoint *ept) |
| 673 | { |
| 674 | struct usb_info *ui = the_usb_info; |
| 675 | unsigned long flags; |
| 676 | |
| 677 | if (!ept) |
| 678 | return -EINVAL; |
| 679 | spin_lock_irqsave(&ui->lock, flags); |
| 680 | ept->alloced = 0; |
| 681 | ept->ui = 0; |
| 682 | spin_unlock_irqrestore(&ui->lock, flags); |
| 683 | |
| 684 | return 0; |
| 685 | } |
| 686 | EXPORT_SYMBOL(usb_free_endpoint); |
| 687 | |
| 688 | struct usb_request *usb_ept_alloc_req(struct usb_endpoint *ept, |
| 689 | unsigned bufsize) |
| 690 | { |
| 691 | struct usb_info *ui = ept->ui; |
| 692 | struct msm_request *req; |
| 693 | |
| 694 | if (!ui) |
| 695 | return NULL; |
| 696 | |
| 697 | req = kzalloc(sizeof(*req), GFP_ATOMIC); |
| 698 | if (!req) |
| 699 | goto fail1; |
| 700 | |
| 701 | req->item = dma_pool_alloc(ui->pool, GFP_ATOMIC, &req->item_dma); |
| 702 | if (!req->item) |
| 703 | goto fail2; |
| 704 | |
| 705 | if (bufsize) { |
| 706 | req->req.buf = kmalloc(bufsize, GFP_ATOMIC); |
| 707 | if (!req->req.buf) |
| 708 | goto fail3; |
| 709 | req->alloced = 1; |
| 710 | } |
| 711 | |
| 712 | return &req->req; |
| 713 | |
| 714 | fail3: |
| 715 | dma_pool_free(ui->pool, req->item, req->item_dma); |
| 716 | fail2: |
| 717 | kfree(req); |
| 718 | fail1: |
| 719 | return NULL; |
| 720 | } |
| 721 | EXPORT_SYMBOL(usb_ept_alloc_req); |
| 722 | |
| 723 | static void do_free_req(struct usb_info *ui, struct msm_request *req) |
| 724 | { |
| 725 | if (req->alloced) |
| 726 | kfree(req->req.buf); |
| 727 | |
| 728 | dma_pool_free(ui->pool, req->item, req->item_dma); |
| 729 | kfree(req); |
| 730 | } |
| 731 | |
| 732 | void usb_ept_free_req(struct usb_endpoint *ept, struct usb_request *_req) |
| 733 | { |
| 734 | struct msm_request *req, *temp_req, *prev_req; |
| 735 | struct usb_info *ui; |
| 736 | unsigned long flags; |
| 737 | int dead = 0; |
| 738 | if (!ept || !_req) |
| 739 | return; |
| 740 | |
| 741 | ui = ept->ui; |
| 742 | if (!ui) |
| 743 | return; |
| 744 | |
| 745 | req = to_msm_request(_req); |
| 746 | spin_lock_irqsave(&ui->lock, flags); |
| 747 | /* defer freeing resources if request is still busy */ |
| 748 | if (req->busy) |
| 749 | dead = req->dead = 1; |
| 750 | spin_unlock_irqrestore(&ui->lock, flags); |
| 751 | |
| 752 | /* if req->dead, then we will clean up when the request finishes */ |
| 753 | if (!dead) { |
| 754 | temp_req = ept->req; |
| 755 | prev_req = temp_req; |
| 756 | while (temp_req != NULL) { |
| 757 | if (req == temp_req && ept->req != temp_req) |
| 758 | prev_req->next = temp_req->next; |
| 759 | |
| 760 | prev_req = temp_req; |
| 761 | temp_req = temp_req->next; |
| 762 | } |
| 763 | if (ept->req == req) |
| 764 | ept->req = req->next; |
| 765 | req->req.complete = NULL; |
| 766 | do_free_req(ui, req); |
| 767 | } else |
| 768 | pr_err("%s: req is busy, can't free req\n", __func__); |
| 769 | } |
| 770 | EXPORT_SYMBOL(usb_ept_free_req); |
| 771 | |
| 772 | void usb_ept_enable(struct usb_endpoint *ept, int yes) |
| 773 | { |
| 774 | struct usb_info *ui; |
| 775 | int in; |
| 776 | unsigned n; |
| 777 | unsigned char xfer; |
| 778 | |
| 779 | if (!ept || !ept->ui) |
| 780 | return; |
| 781 | ui = ept->ui; |
| 782 | in = ept->flags & EPT_FLAG_IN; |
| 783 | if (!ept->ep_descriptor) |
| 784 | return; |
| 785 | |
| 786 | if (ui->in_lpm) { |
| 787 | pr_err("%s: controller is in lpm, cannot proceed\n", __func__); |
| 788 | return; |
| 789 | } |
| 790 | |
| 791 | xfer = ept->ep_descriptor->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; |
| 792 | |
| 793 | n = readl(USB_ENDPTCTRL(ept->num)); |
| 794 | |
| 795 | if (in) { |
| 796 | if (xfer == USB_ENDPOINT_XFER_BULK) |
| 797 | n = (n & (~CTRL_TXT_MASK)) | CTRL_TXT_BULK; |
| 798 | else if (xfer == USB_ENDPOINT_XFER_INT) |
| 799 | n = (n & (~CTRL_TXT_MASK)) | CTRL_TXT_INT; |
| 800 | if (yes) |
| 801 | n |= CTRL_TXE | CTRL_TXR; |
| 802 | else |
| 803 | n &= (~CTRL_TXE); |
| 804 | } else { |
| 805 | if (xfer == USB_ENDPOINT_XFER_BULK) |
| 806 | n = (n & (~CTRL_RXT_MASK)) | CTRL_RXT_BULK; |
| 807 | else if (xfer == USB_ENDPOINT_XFER_INT) |
| 808 | n = (n & (~CTRL_RXT_MASK)) | CTRL_RXT_INT; |
| 809 | if (yes) |
| 810 | n |= CTRL_RXE | CTRL_RXR; |
| 811 | else |
| 812 | n &= ~(CTRL_RXE); |
| 813 | } |
| 814 | /* complete all the updates to ept->head before enabling endpoint*/ |
| 815 | dma_coherent_pre_ops(); |
| 816 | writel(n, USB_ENDPTCTRL(ept->num)); |
| 817 | } |
| 818 | EXPORT_SYMBOL(usb_ept_enable); |
| 819 | |
| 820 | static void usb_ept_start(struct usb_endpoint *ept) |
| 821 | { |
| 822 | struct usb_info *ui = ept->ui; |
| 823 | struct msm_request *req = ept->req; |
| 824 | |
| 825 | BUG_ON(req->live); |
| 826 | |
| 827 | /* link the hw queue head to the request's transaction item */ |
| 828 | ept->head->next = req->item_dma; |
| 829 | ept->head->info = 0; |
| 830 | |
| 831 | /* memory barrier to flush the data before priming endpoint*/ |
| 832 | dma_coherent_pre_ops(); |
| 833 | /* start the endpoint */ |
| 834 | writel(1 << ept->bit, USB_ENDPTPRIME); |
| 835 | |
| 836 | /* mark this chain of requests as live */ |
| 837 | while (req) { |
| 838 | req->live = 1; |
| 839 | if (req->item->next == TERMINATE) |
| 840 | break; |
| 841 | req = req->next; |
| 842 | } |
| 843 | } |
| 844 | |
| 845 | int usb_ept_queue_xfer(struct usb_endpoint *ept, struct usb_request *_req) |
| 846 | { |
| 847 | unsigned long flags; |
| 848 | struct msm_request *req = to_msm_request(_req); |
| 849 | struct msm_request *last; |
| 850 | struct usb_info *ui = ept->ui; |
| 851 | struct ept_queue_item *item = req->item; |
| 852 | unsigned length = req->req.length; |
| 853 | |
| 854 | if (length > 0x4000) |
| 855 | return -EMSGSIZE; |
| 856 | |
| 857 | if (ui->in_lpm) { |
| 858 | req->req.status = usb_remote_wakeup(); |
| 859 | if (req->req.status) { |
| 860 | pr_debug("%s:RWakeup generation failed, EP = %x\n", |
| 861 | __func__, ept->bit); |
| 862 | return req->req.status; |
| 863 | } |
| 864 | } |
| 865 | |
| 866 | spin_lock_irqsave(&ui->lock, flags); |
| 867 | |
| 868 | if (req->busy) { |
| 869 | req->req.status = -EBUSY; |
| 870 | spin_unlock_irqrestore(&ui->lock, flags); |
| 871 | printk(KERN_INFO |
| 872 | "usb_ept_queue_xfer() tried to queue busy request\n"); |
| 873 | return -EBUSY; |
| 874 | } |
| 875 | |
| 876 | if (!ui->online && (ept->num != 0)) { |
| 877 | req->req.status = -ENODEV; |
| 878 | spin_unlock_irqrestore(&ui->lock, flags); |
| 879 | printk(KERN_INFO "usb_ept_queue_xfer() tried to queue request" |
| 880 | "while offline; ept->bit: %x\n", ept->bit); |
| 881 | return -ENODEV; |
| 882 | } |
| 883 | |
| 884 | req->busy = 1; |
| 885 | req->live = 0; |
| 886 | req->next = 0; |
| 887 | req->req.status = -EBUSY; |
| 888 | |
| 889 | req->dma = dma_map_single(NULL, req->req.buf, length, |
| 890 | (ept->flags & EPT_FLAG_IN) ? |
| 891 | DMA_TO_DEVICE : DMA_FROM_DEVICE); |
| 892 | |
| 893 | /* prepare the transaction descriptor item for the hardware */ |
| 894 | item->next = TERMINATE; |
| 895 | item->info = INFO_BYTES(length) | INFO_IOC | INFO_ACTIVE; |
| 896 | item->page0 = req->dma; |
| 897 | item->page1 = (req->dma + 0x1000) & 0xfffff000; |
| 898 | item->page2 = (req->dma + 0x2000) & 0xfffff000; |
| 899 | item->page3 = (req->dma + 0x3000) & 0xfffff000; |
| 900 | |
| 901 | /* Add the new request to the end of the queue */ |
| 902 | last = ept->last; |
| 903 | if (last) { |
| 904 | /* Already requests in the queue. add us to the |
| 905 | * end, but let the completion interrupt actually |
| 906 | * start things going, to avoid hw issues |
| 907 | */ |
| 908 | last->next = req; |
| 909 | |
| 910 | /* only modify the hw transaction next pointer if |
| 911 | * that request is not live |
| 912 | */ |
| 913 | if (!last->live) |
| 914 | last->item->next = req->item_dma; |
| 915 | } else { |
| 916 | /* queue was empty -- kick the hardware */ |
| 917 | ept->req = req; |
| 918 | usb_ept_start(ept); |
| 919 | } |
| 920 | ept->last = req; |
| 921 | |
| 922 | spin_unlock_irqrestore(&ui->lock, flags); |
| 923 | return 0; |
| 924 | } |
| 925 | EXPORT_SYMBOL(usb_ept_queue_xfer); |
| 926 | |
| 927 | int usb_ept_flush(struct usb_endpoint *ept) |
| 928 | { |
| 929 | printk("usb_ept_flush \n"); |
| 930 | flush_endpoint(ept); |
| 931 | return 0; |
| 932 | } |
| 933 | |
| 934 | int usb_ept_get_max_packet(struct usb_endpoint *ept) |
| 935 | { |
| 936 | return ept->max_pkt; |
| 937 | } |
| 938 | EXPORT_SYMBOL(usb_ept_get_max_packet); |
| 939 | |
| 940 | int usb_remote_wakeup(void) |
| 941 | { |
| 942 | struct usb_info *ui = the_usb_info; |
| 943 | unsigned long flags; |
| 944 | |
| 945 | spin_lock_irqsave(&ui->lock, flags); |
| 946 | if (!ui->remote_wakeup) { |
| 947 | spin_unlock_irqrestore(&ui->lock, flags); |
| 948 | pr_err("%s: remote wakeup not supported\n", __func__); |
| 949 | return -ENOTSUPP; |
| 950 | } |
| 951 | |
| 952 | if (!ui->online) { |
| 953 | spin_unlock_irqrestore(&ui->lock, flags); |
| 954 | pr_err("%s: device is not configured\n", __func__); |
| 955 | return -ENODEV; |
| 956 | } |
| 957 | |
| 958 | if (ui->in_lpm) |
| 959 | usb_lpm_exit(ui); |
| 960 | spin_unlock_irqrestore(&ui->lock, flags); |
| 961 | |
| 962 | /* if usb_lpm_exit is unable to set PHCD, |
| 963 | * it would initiate workthread to set the PHCD |
| 964 | */ |
| 965 | if (cancel_work_sync(&ui->li.wakeup_phy)) |
| 966 | usb_lpm_wakeup_phy(NULL); |
| 967 | |
| 968 | spin_lock_irqsave(&ui->lock, flags); |
| 969 | if (ui->in_lpm) { |
| 970 | spin_unlock_irqrestore(&ui->lock, flags); |
| 971 | pr_err("%s: cannot bring controller out of lpm\n", __func__); |
| 972 | return -ENODEV; |
| 973 | } |
| 974 | |
| 975 | if (!usb_is_online(ui)) { |
| 976 | pr_debug("%s: enabling force resume\n", __func__); |
| 977 | writel(readl(USB_PORTSC) | PORTSC_FPR, USB_PORTSC); |
| 978 | } else |
| 979 | pr_debug("%s: controller seems to be out of suspend already\n", |
| 980 | __func__); |
| 981 | spin_unlock_irqrestore(&ui->lock, flags); |
| 982 | |
| 983 | return 0; |
| 984 | } |
| 985 | EXPORT_SYMBOL(usb_remote_wakeup); |
| 986 | |
| 987 | /* --- endpoint 0 handling --- */ |
| 988 | |
| 989 | static void set_configuration(struct usb_info *ui, int yes) |
| 990 | { |
| 991 | unsigned i; |
| 992 | |
| 993 | ui->online = !!yes; |
| 994 | |
| 995 | for (i = 0; i < ui->num_funcs; i++) { |
| 996 | struct usb_function_info *fi = ui->func[i]; |
| 997 | if (!fi || !(ui->composition->functions & (1 << i))) |
| 998 | continue; |
| 999 | if (fi->func->configure) |
| 1000 | fi->func->configure(yes, fi->func->context); |
| 1001 | } |
| 1002 | } |
| 1003 | |
| 1004 | static void ep0out_complete(struct usb_endpoint *ept, struct usb_request *req) |
| 1005 | { |
| 1006 | req->complete = 0; |
| 1007 | } |
| 1008 | |
| 1009 | static void ep0in_complete(struct usb_endpoint *ept, struct usb_request *req) |
| 1010 | { |
| 1011 | /* queue up the receive of the ACK response from the host */ |
| 1012 | if (req->status == 0) { |
| 1013 | struct usb_info *ui = ept->ui; |
| 1014 | req->length = 0; |
| 1015 | req->complete = ep0out_complete; |
| 1016 | usb_ept_queue_xfer(&ui->ep0out, req); |
| 1017 | } |
| 1018 | } |
| 1019 | |
| 1020 | static void ep0in_complete_sendzero( |
| 1021 | struct usb_endpoint *ept, struct usb_request *req) |
| 1022 | { |
| 1023 | if (req->status == 0) { |
| 1024 | struct usb_info *ui = ept->ui; |
| 1025 | req->length = 0; |
| 1026 | req->complete = ep0in_complete; |
| 1027 | usb_ept_queue_xfer(&ui->ep0in, req); |
| 1028 | } |
| 1029 | } |
| 1030 | |
| 1031 | static void ep0_status_complete( |
| 1032 | struct usb_endpoint *ept, struct usb_request *req) |
| 1033 | { |
| 1034 | struct usb_info *ui = ept->ui; |
| 1035 | unsigned int i; |
| 1036 | |
| 1037 | if (!ui->test_mode) |
| 1038 | return; |
| 1039 | |
| 1040 | switch (ui->test_mode) { |
| 1041 | case J_TEST: |
| 1042 | pr_info("usb electrical test mode: (J)\n"); |
| 1043 | i = readl(USB_PORTSC) & (~PORTSC_PTC); |
| 1044 | writel(i | PORTSC_PTC_J_STATE, USB_PORTSC); |
| 1045 | break; |
| 1046 | |
| 1047 | case K_TEST: |
| 1048 | pr_info("usb electrical test mode: (K)\n"); |
| 1049 | i = readl(USB_PORTSC) & (~PORTSC_PTC); |
| 1050 | writel(i | PORTSC_PTC_K_STATE, USB_PORTSC); |
| 1051 | break; |
| 1052 | |
| 1053 | case SE0_NAK_TEST: |
| 1054 | pr_info("usb electrical test mode: (SE0-NAK)\n"); |
| 1055 | i = readl(USB_PORTSC) & (~PORTSC_PTC); |
| 1056 | writel(i | PORTSC_PTC_SE0_NAK, USB_PORTSC); |
| 1057 | break; |
| 1058 | |
| 1059 | case TST_PKT_TEST: |
| 1060 | pr_info("usb electrical test mode: (TEST_PKT)\n"); |
| 1061 | i = readl(USB_PORTSC) & (~PORTSC_PTC); |
| 1062 | writel(i | PORTSC_PTC_TST_PKT, USB_PORTSC); |
| 1063 | break; |
| 1064 | default: |
| 1065 | pr_err("usb:%s: undefined test mode: (%x)\n", |
| 1066 | __func__, ui->test_mode); |
| 1067 | } |
| 1068 | |
| 1069 | } |
| 1070 | |
| 1071 | static void ep0_setup_ack(struct usb_info *ui) |
| 1072 | { |
| 1073 | struct usb_request *req = ui->setup_req; |
| 1074 | req->length = 0; |
| 1075 | req->complete = ep0_status_complete; |
| 1076 | usb_ept_queue_xfer(&ui->ep0in, req); |
| 1077 | } |
| 1078 | |
| 1079 | static void ep0_setup_stall(struct usb_info *ui) |
| 1080 | { |
| 1081 | writel((1<<16) | (1<<0), USB_ENDPTCTRL(0)); |
| 1082 | } |
| 1083 | |
| 1084 | static void ep0_setup_receive(struct usb_info *ui, unsigned len) |
| 1085 | { |
| 1086 | ui->ep0out_req->length = len; |
| 1087 | usb_ept_queue_xfer(&ui->ep0out, ui->ep0out_req); |
| 1088 | } |
| 1089 | |
| 1090 | static void ep0_setup_send(struct usb_info *ui, unsigned wlen) |
| 1091 | { |
| 1092 | struct usb_request *req = ui->setup_req; |
| 1093 | struct usb_endpoint *ept = &ui->ep0in; |
| 1094 | |
| 1095 | /* never send more data than the host requested */ |
| 1096 | if (req->length > wlen) |
| 1097 | req->length = wlen; |
| 1098 | |
| 1099 | /* if we are sending a short response that ends on |
| 1100 | * a packet boundary, we'll need to send a zero length |
| 1101 | * packet as well. |
| 1102 | */ |
| 1103 | if ((req->length != wlen) && ((req->length & 63) == 0)) { |
| 1104 | req->complete = ep0in_complete_sendzero; |
| 1105 | } else { |
| 1106 | req->complete = ep0in_complete; |
| 1107 | } |
| 1108 | |
| 1109 | usb_ept_queue_xfer(ept, req); |
| 1110 | } |
| 1111 | |
| 1112 | |
| 1113 | static int usb_find_descriptor(struct usb_info *ui, struct usb_ctrlrequest *ctl, |
| 1114 | struct usb_request *req); |
| 1115 | |
| 1116 | static void handle_setup(struct usb_info *ui) |
| 1117 | { |
| 1118 | struct usb_ctrlrequest ctl; |
| 1119 | |
| 1120 | memcpy(&ctl, ui->ep0out.head->setup_data, sizeof(ctl)); |
| 1121 | writel(EPT_RX(0), USB_ENDPTSETUPSTAT); |
| 1122 | |
| 1123 | /* any pending ep0 transactions must be canceled */ |
| 1124 | flush_endpoint(&ui->ep0out); |
| 1125 | flush_endpoint(&ui->ep0in); |
| 1126 | |
| 1127 | /* let functions handle vendor and class requests */ |
| 1128 | if ((ctl.bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD) { |
| 1129 | struct usb_function *func; |
| 1130 | |
| 1131 | /* Send stall if received interface number is invalid */ |
| 1132 | if (ctl.wIndex >= ui->next_ifc_num) |
| 1133 | goto stall; |
| 1134 | |
| 1135 | func = ui->func2ifc_map[ctl.wIndex]; |
| 1136 | if (func && func->setup) { |
| 1137 | if (ctl.bRequestType & USB_DIR_IN) { |
| 1138 | struct usb_request *req = ui->setup_req; |
| 1139 | int ret = func->setup(&ctl, |
| 1140 | req->buf, SETUP_BUF_SIZE, |
| 1141 | func->context); |
| 1142 | if (ret >= 0) { |
| 1143 | req->length = ret; |
| 1144 | ep0_setup_send(ui, ctl.wLength); |
| 1145 | return; |
| 1146 | } |
| 1147 | } else { |
| 1148 | int ret = func->setup(&ctl, NULL, 0, |
| 1149 | func->context); |
| 1150 | if (ret == 0) { |
| 1151 | ep0_setup_ack(ui); |
| 1152 | return; |
| 1153 | } else if (ret > 0) { |
| 1154 | ep0_setup_receive(ui, ret); |
| 1155 | return; |
| 1156 | } |
| 1157 | } |
| 1158 | } |
| 1159 | goto stall; |
| 1160 | return; |
| 1161 | } |
| 1162 | |
| 1163 | switch (ctl.bRequest) { |
| 1164 | case USB_REQ_GET_STATUS: |
| 1165 | { |
| 1166 | struct usb_request *req = ui->setup_req; |
| 1167 | if ((ctl.bRequestType & (USB_DIR_MASK)) != (USB_DIR_IN)) |
| 1168 | break; |
| 1169 | if (ctl.wLength != 2) |
| 1170 | break; |
| 1171 | req->length = 2; |
| 1172 | switch (ctl.bRequestType & USB_RECIP_MASK) { |
| 1173 | case USB_RECIP_ENDPOINT: |
| 1174 | { |
| 1175 | unsigned num = ctl.wIndex & USB_ENDPOINT_NUMBER_MASK; |
| 1176 | struct usb_endpoint *ept; |
| 1177 | |
| 1178 | if (num == 0) |
| 1179 | break; |
| 1180 | if (ctl.wIndex & USB_ENDPOINT_DIR_MASK) |
| 1181 | num += 16; |
| 1182 | ept = ui->ept + num; |
| 1183 | memcpy(req->buf, &ept->ept_halted, 2); |
| 1184 | break; |
| 1185 | } |
| 1186 | |
| 1187 | case USB_RECIP_DEVICE: |
| 1188 | { |
| 1189 | unsigned short temp = 0; |
| 1190 | if (usb_msm_get_selfpowered()) |
| 1191 | temp = 1 << USB_DEVICE_SELF_POWERED; |
| 1192 | if (usb_msm_get_remotewakeup()) |
| 1193 | temp |= 1 << USB_DEVICE_REMOTE_WAKEUP; |
| 1194 | memcpy(req->buf, &temp, 2); |
| 1195 | break; |
| 1196 | } |
| 1197 | |
| 1198 | case USB_RECIP_INTERFACE: |
| 1199 | memset(req->buf, 0, 2); |
| 1200 | break; |
| 1201 | default: |
| 1202 | printk(KERN_ERR "Unreconginized recipient\n"); |
| 1203 | break; |
| 1204 | } |
| 1205 | |
| 1206 | ep0_setup_send(ui, 2); |
| 1207 | return; |
| 1208 | } |
| 1209 | |
| 1210 | case USB_REQ_GET_DESCRIPTOR: |
| 1211 | { |
| 1212 | struct usb_request *req; |
| 1213 | |
| 1214 | if ((ctl.bRequestType & (USB_DIR_MASK)) != (USB_DIR_IN)) |
| 1215 | break; |
| 1216 | |
| 1217 | req = ui->setup_req; |
| 1218 | if (!usb_find_descriptor(ui, &ctl, req)) { |
| 1219 | if (req->length > ctl.wLength) |
| 1220 | req->length = ctl.wLength; |
| 1221 | ep0_setup_send(ui, ctl.wLength); |
| 1222 | return; |
| 1223 | } |
| 1224 | break; |
| 1225 | } |
| 1226 | |
| 1227 | case USB_REQ_SET_FEATURE: |
| 1228 | if ((ctl.bRequestType & (USB_DIR_MASK)) != (USB_DIR_OUT)) |
| 1229 | break; |
| 1230 | if (ctl.wLength != 0) |
| 1231 | break; |
| 1232 | switch (ctl.bRequestType & USB_RECIP_MASK) { |
| 1233 | case USB_RECIP_DEVICE: |
| 1234 | if (ctl.wValue == USB_DEVICE_REMOTE_WAKEUP) { |
| 1235 | ui->remote_wakeup = 1; |
| 1236 | ep0_setup_ack(ui); |
| 1237 | return; |
| 1238 | } else if (ctl.wValue == USB_DEVICE_TEST_MODE) { |
| 1239 | if (ctl.wIndex & 0x0f) |
| 1240 | break; |
| 1241 | ui->test_mode = ctl.wIndex; |
| 1242 | ep0_setup_ack(ui); |
| 1243 | return; |
| 1244 | } |
| 1245 | break; |
| 1246 | |
| 1247 | case USB_RECIP_ENDPOINT: |
| 1248 | { |
| 1249 | unsigned num = ctl.wIndex & USB_ENDPOINT_NUMBER_MASK; |
| 1250 | if ((num == 0) || (ctl.wValue != 0)) |
| 1251 | break; |
| 1252 | if (ctl.wIndex & USB_ENDPOINT_DIR_MASK) |
| 1253 | num += 16; |
| 1254 | usb_ept_set_halt(ui->ept + num); |
| 1255 | ep0_setup_ack(ui); |
| 1256 | return; |
| 1257 | } |
| 1258 | |
| 1259 | default: |
| 1260 | pr_err("usb: %s: set_feature: unrecognized recipient\n", |
| 1261 | __func__); |
| 1262 | break; |
| 1263 | } |
| 1264 | break; |
| 1265 | |
| 1266 | case USB_REQ_CLEAR_FEATURE: |
| 1267 | { |
| 1268 | if ((ctl.bRequestType & (USB_DIR_MASK)) != (USB_DIR_OUT)) |
| 1269 | break; |
| 1270 | if (ctl.wLength != 0) |
| 1271 | break; |
| 1272 | |
| 1273 | switch (ctl.bRequestType & USB_RECIP_MASK) { |
| 1274 | case USB_RECIP_DEVICE: |
| 1275 | if (ctl.wValue != USB_DEVICE_REMOTE_WAKEUP) |
| 1276 | break; |
| 1277 | ui->remote_wakeup = 0; |
| 1278 | ep0_setup_ack(ui); |
| 1279 | return; |
| 1280 | case USB_RECIP_ENDPOINT: |
| 1281 | { |
| 1282 | unsigned num; |
| 1283 | if (ctl.wValue != USB_ENDPOINT_HALT) |
| 1284 | break; |
| 1285 | num = ctl.wIndex & USB_ENDPOINT_NUMBER_MASK; |
| 1286 | if (num != 0) { |
| 1287 | if (ctl.wIndex & USB_ENDPOINT_DIR_MASK) |
| 1288 | num += 16; |
| 1289 | usb_ept_clear_halt(ui->ept + num); |
| 1290 | } |
| 1291 | ep0_setup_ack(ui); |
| 1292 | return; |
| 1293 | } |
| 1294 | default: |
| 1295 | pr_info("unsupported clear feature command\n"); |
| 1296 | pr_info("Request-type:(%08x) wValue:(%08x) " |
| 1297 | "wIndex:(%08x) wLength:(%08x)\n", |
| 1298 | ctl.bRequestType, ctl.wValue, |
| 1299 | ctl.wIndex, ctl.wLength); |
| 1300 | break; |
| 1301 | } |
| 1302 | break; |
| 1303 | } |
| 1304 | |
| 1305 | case USB_REQ_SET_INTERFACE: |
| 1306 | if ((ctl.bRequestType & (USB_DIR_MASK | USB_RECIP_MASK)) |
| 1307 | != (USB_DIR_OUT | USB_RECIP_INTERFACE)) |
| 1308 | break; |
| 1309 | if (ui->func2ifc_map[ctl.wIndex]->set_interface) { |
| 1310 | ui->func2ifc_map[ctl.wIndex]->set_interface(ctl.wIndex, |
| 1311 | ctl.wValue, |
| 1312 | ui->func2ifc_map[ctl.wIndex]->context); |
| 1313 | ep0_setup_ack(ui); |
| 1314 | return; |
| 1315 | } |
| 1316 | break; |
| 1317 | case USB_REQ_GET_INTERFACE: |
| 1318 | { |
| 1319 | struct usb_function *f; |
| 1320 | struct usb_request *req = ui->setup_req; |
| 1321 | int ifc_num = ctl.wIndex; |
| 1322 | int ret = 0; |
| 1323 | |
| 1324 | if ((ctl.bRequestType & (USB_DIR_MASK | USB_RECIP_MASK)) |
| 1325 | != (USB_DIR_IN | USB_RECIP_INTERFACE)) |
| 1326 | break; |
| 1327 | |
| 1328 | f = ui->func2ifc_map[ifc_num]; |
| 1329 | if (!f->get_interface) |
| 1330 | break; |
| 1331 | ret = f->get_interface(ifc_num, |
| 1332 | ui->func2ifc_map[ifc_num]->context); |
| 1333 | if (ret < 0) |
| 1334 | break; |
| 1335 | req->length = ctl.wLength; |
| 1336 | memcpy(req->buf, &ret, req->length); |
| 1337 | ep0_setup_send(ui, ctl.wLength); |
| 1338 | return; |
| 1339 | } |
| 1340 | case USB_REQ_SET_CONFIGURATION: |
| 1341 | if ((ctl.bRequestType & USB_DIR_MASK) != USB_DIR_OUT) |
| 1342 | break; |
| 1343 | ui->configured = ctl.wValue; |
| 1344 | pr_info("hsusb set_configuration wValue = %d usbcmd = %x\n", |
| 1345 | ctl.wValue, readl(USB_USBCMD)); |
| 1346 | set_configuration(ui, ctl.wValue); |
| 1347 | ep0_setup_ack(ui); |
| 1348 | ui->flags = USB_FLAG_CONFIGURE; |
| 1349 | if (ui->configured) |
| 1350 | ui->usb_state = USB_STATE_CONFIGURED; |
| 1351 | queue_delayed_work(usb_work, &ui->work, 0); |
| 1352 | return; |
| 1353 | |
| 1354 | case USB_REQ_GET_CONFIGURATION: |
| 1355 | { |
| 1356 | unsigned conf; |
| 1357 | struct usb_request *req = ui->setup_req; |
| 1358 | req->length = 1; |
| 1359 | conf = ui->configured; |
| 1360 | memcpy(req->buf, &conf, req->length); |
| 1361 | ep0_setup_send(ui, ctl.wLength); |
| 1362 | return; |
| 1363 | } |
| 1364 | |
| 1365 | case USB_REQ_SET_ADDRESS: |
| 1366 | if ((ctl.bRequestType & (USB_DIR_MASK | USB_RECIP_MASK)) |
| 1367 | != (USB_DIR_OUT | USB_RECIP_DEVICE)) |
| 1368 | break; |
| 1369 | ui->usb_state = USB_STATE_ADDRESS; |
| 1370 | writel((ctl.wValue << 25) | (1 << 24), USB_DEVICEADDR); |
| 1371 | ep0_setup_ack(ui); |
| 1372 | return; |
| 1373 | } |
| 1374 | |
| 1375 | stall: |
| 1376 | ep0_setup_stall(ui); |
| 1377 | return; |
| 1378 | |
| 1379 | } |
| 1380 | |
| 1381 | static void handle_endpoint(struct usb_info *ui, unsigned bit) |
| 1382 | { |
| 1383 | struct usb_endpoint *ept = ui->ept + bit; |
| 1384 | struct msm_request *req; |
| 1385 | unsigned long flags; |
| 1386 | unsigned info; |
| 1387 | |
| 1388 | #if 0 |
| 1389 | printk(KERN_INFO "handle_endpoint() %d %s req=%p(%08x)\n", |
| 1390 | ept->num, (ept->flags & EPT_FLAG_IN) ? "in" : "out", |
| 1391 | ept->req, ept->req ? ept->req->item_dma : 0); |
| 1392 | #endif |
| 1393 | if (!ept) { |
| 1394 | pr_err("%s: ept is null: ep bit = %d\n", __func__, bit); |
| 1395 | return; |
| 1396 | } |
| 1397 | |
| 1398 | /* expire all requests that are no longer active */ |
| 1399 | spin_lock_irqsave(&ui->lock, flags); |
| 1400 | while ((req = ept->req)) { |
| 1401 | /* clean speculative fetches on req->item->info */ |
| 1402 | dma_coherent_post_ops(); |
| 1403 | info = req->item->info; |
| 1404 | |
| 1405 | /* if we've processed all live requests, time to |
| 1406 | * restart the hardware on the next non-live request |
| 1407 | */ |
| 1408 | if (!req->live) { |
| 1409 | usb_ept_start(ept); |
| 1410 | break; |
| 1411 | } |
| 1412 | |
| 1413 | /* if the transaction is still in-flight, stop here */ |
| 1414 | if (info & INFO_ACTIVE) |
| 1415 | break; |
| 1416 | |
| 1417 | /* advance ept queue to the next request */ |
| 1418 | ept->req = req->next; |
| 1419 | if (ept->req == 0) |
| 1420 | ept->last = 0; |
| 1421 | |
| 1422 | dma_unmap_single(NULL, req->dma, req->req.length, |
| 1423 | (ept->flags & EPT_FLAG_IN) ? |
| 1424 | DMA_TO_DEVICE : DMA_FROM_DEVICE); |
| 1425 | |
| 1426 | if (info & (INFO_HALTED | INFO_BUFFER_ERROR | INFO_TXN_ERROR)) { |
| 1427 | /* XXX pass on more specific error code */ |
| 1428 | req->req.status = -EIO; |
| 1429 | req->req.actual = 0; |
| 1430 | printk(KERN_INFO "hsusb: ept %d %s error. info=%08x\n", |
| 1431 | ept->num, |
| 1432 | (ept->flags & EPT_FLAG_IN) ? "in" : "out", |
| 1433 | info); |
| 1434 | } else { |
| 1435 | req->req.status = 0; |
| 1436 | req->req.actual = req->req.length - ((info >> 16) & 0x7FFF); |
| 1437 | } |
| 1438 | req->busy = 0; |
| 1439 | req->live = 0; |
| 1440 | if (req->dead) |
| 1441 | do_free_req(ui, req); |
| 1442 | |
| 1443 | if (req->req.complete) { |
| 1444 | spin_unlock_irqrestore(&ui->lock, flags); |
| 1445 | req->req.complete(ept, &req->req); |
| 1446 | spin_lock_irqsave(&ui->lock, flags); |
| 1447 | } |
| 1448 | } |
| 1449 | spin_unlock_irqrestore(&ui->lock, flags); |
| 1450 | } |
| 1451 | |
| 1452 | static void flush_endpoint_hw(struct usb_info *ui, unsigned bits) |
| 1453 | { |
| 1454 | /* flush endpoint, canceling transactions |
| 1455 | ** - this can take a "large amount of time" (per databook) |
| 1456 | ** - the flush can fail in some cases, thus we check STAT |
| 1457 | ** and repeat if we're still operating |
| 1458 | ** (does the fact that this doesn't use the tripwire matter?!) |
| 1459 | */ |
| 1460 | |
| 1461 | if (ui->in_lpm) { |
| 1462 | pr_err("%s: controller is in lpm, cannot proceed\n", __func__); |
| 1463 | return; |
| 1464 | } |
| 1465 | |
| 1466 | do { |
| 1467 | writel(bits, USB_ENDPTFLUSH); |
| 1468 | while (readl(USB_ENDPTFLUSH) & bits) |
| 1469 | udelay(100); |
| 1470 | } while (readl(USB_ENDPTSTAT) & bits); |
| 1471 | } |
| 1472 | |
| 1473 | static void flush_endpoint_sw(struct usb_endpoint *ept) |
| 1474 | { |
| 1475 | struct usb_info *ui = ept->ui; |
| 1476 | struct msm_request *req, *next; |
| 1477 | unsigned long flags; |
| 1478 | |
| 1479 | /* inactive endpoints have nothing to do here */ |
| 1480 | if (!ui || !ept->alloced || !ept->max_pkt) |
| 1481 | return; |
| 1482 | |
| 1483 | /* put the queue head in a sane state */ |
| 1484 | ept->head->info = 0; |
| 1485 | ept->head->next = TERMINATE; |
| 1486 | |
| 1487 | /* cancel any pending requests */ |
| 1488 | spin_lock_irqsave(&ui->lock, flags); |
| 1489 | req = ept->req; |
| 1490 | ept->req = 0; |
| 1491 | ept->last = 0; |
| 1492 | while (req != 0) { |
| 1493 | next = req->next; |
| 1494 | |
| 1495 | req->busy = 0; |
| 1496 | req->live = 0; |
| 1497 | req->req.status = -ENODEV; |
| 1498 | req->req.actual = 0; |
| 1499 | if (req->req.complete) { |
| 1500 | spin_unlock_irqrestore(&ui->lock, flags); |
| 1501 | req->req.complete(ept, &req->req); |
| 1502 | spin_lock_irqsave(&ui->lock, flags); |
| 1503 | } |
| 1504 | if (req->dead) |
| 1505 | do_free_req(ui, req); |
| 1506 | req = req->next; |
| 1507 | } |
| 1508 | spin_unlock_irqrestore(&ui->lock, flags); |
| 1509 | } |
| 1510 | |
| 1511 | static void flush_endpoint(struct usb_endpoint *ept) |
| 1512 | { |
| 1513 | if (!ept->ui) |
| 1514 | return; |
| 1515 | |
| 1516 | flush_endpoint_hw(ept->ui, (1 << ept->bit)); |
| 1517 | flush_endpoint_sw(ept); |
| 1518 | } |
| 1519 | |
| 1520 | static void flush_all_endpoints(struct usb_info *ui) |
| 1521 | { |
| 1522 | unsigned n; |
| 1523 | |
| 1524 | flush_endpoint_hw(ui, 0xffffffff); |
| 1525 | |
| 1526 | for (n = 0; n < 32; n++) |
| 1527 | flush_endpoint_sw(ui->ept + n); |
| 1528 | } |
| 1529 | |
| 1530 | #define HW_DELAY_FOR_LPM msecs_to_jiffies(1000) |
| 1531 | #define DELAY_FOR_USB_VBUS_STABILIZE msecs_to_jiffies(500) |
| 1532 | static irqreturn_t usb_interrupt(int irq, void *data) |
| 1533 | { |
| 1534 | struct usb_info *ui = data; |
| 1535 | unsigned n; |
| 1536 | unsigned speed; |
| 1537 | |
| 1538 | if (!ui->active) |
| 1539 | return IRQ_HANDLED; |
| 1540 | |
| 1541 | if (ui->in_lpm) { |
| 1542 | usb_lpm_exit(ui); |
| 1543 | return IRQ_HANDLED; |
| 1544 | } |
| 1545 | |
| 1546 | n = readl(USB_USBSTS); |
| 1547 | writel(n, USB_USBSTS); |
| 1548 | |
| 1549 | /* somehow we got an IRQ while in the reset sequence: ignore it */ |
| 1550 | if (ui->running == 0) { |
| 1551 | pr_err("%s: ui->running is zero\n", __func__); |
| 1552 | return IRQ_HANDLED; |
| 1553 | } |
| 1554 | |
| 1555 | if (n & STS_PCI) { |
| 1556 | if (!(readl(USB_PORTSC) & PORTSC_PORT_RESET)) { |
| 1557 | speed = (readl(USB_PORTSC) & PORTSC_PORT_SPEED_MASK); |
| 1558 | switch (speed) { |
| 1559 | case PORTSC_PORT_SPEED_HIGH: |
| 1560 | pr_info("hsusb resume: speed = HIGH\n"); |
| 1561 | ui->speed = USB_SPEED_HIGH; |
| 1562 | break; |
| 1563 | |
| 1564 | case PORTSC_PORT_SPEED_FULL: |
| 1565 | pr_info("hsusb resume: speed = FULL\n"); |
| 1566 | ui->speed = USB_SPEED_FULL; |
| 1567 | break; |
| 1568 | |
| 1569 | default: |
| 1570 | pr_err("hsusb resume: Unknown Speed\n"); |
| 1571 | ui->speed = USB_SPEED_UNKNOWN; |
| 1572 | break; |
| 1573 | } |
| 1574 | } |
| 1575 | |
| 1576 | /* pci interrutpt would also be generated when resuming |
| 1577 | * from bus suspend, following check would avoid kick |
| 1578 | * starting usb main thread in case of pci interrupts |
| 1579 | * during enumeration |
| 1580 | */ |
| 1581 | if (ui->configured && ui->chg_type == USB_CHG_TYPE__SDP) { |
| 1582 | ui->usb_state = USB_STATE_CONFIGURED; |
| 1583 | ui->flags = USB_FLAG_RESUME; |
| 1584 | queue_delayed_work(usb_work, &ui->work, 0); |
| 1585 | } |
| 1586 | } |
| 1587 | |
| 1588 | if (n & STS_URI) { |
| 1589 | pr_info("hsusb reset interrupt\n"); |
| 1590 | ui->usb_state = USB_STATE_DEFAULT; |
| 1591 | ui->configured = 0; |
| 1592 | schedule_work(&ui->chg_stop); |
| 1593 | |
| 1594 | writel(readl(USB_ENDPTSETUPSTAT), USB_ENDPTSETUPSTAT); |
| 1595 | writel(readl(USB_ENDPTCOMPLETE), USB_ENDPTCOMPLETE); |
| 1596 | writel(0xffffffff, USB_ENDPTFLUSH); |
| 1597 | writel(0, USB_ENDPTCTRL(1)); |
| 1598 | |
| 1599 | if (ui->online != 0) { |
| 1600 | /* marking us offline will cause ept queue attempts to fail */ |
| 1601 | ui->online = 0; |
| 1602 | |
| 1603 | flush_all_endpoints(ui); |
| 1604 | |
| 1605 | /* XXX: we can't seem to detect going offline, so deconfigure |
| 1606 | * XXX: on reset for the time being |
| 1607 | */ |
| 1608 | set_configuration(ui, 0); |
| 1609 | } |
| 1610 | } |
| 1611 | |
| 1612 | if (n & STS_SLI) { |
| 1613 | pr_info("hsusb suspend interrupt\n"); |
| 1614 | ui->usb_state = USB_STATE_SUSPENDED; |
| 1615 | |
| 1616 | /* stop usb charging */ |
| 1617 | schedule_work(&ui->chg_stop); |
| 1618 | } |
| 1619 | |
| 1620 | if (n & STS_UI) { |
| 1621 | n = readl(USB_ENDPTSETUPSTAT); |
| 1622 | if (n & EPT_RX(0)) |
| 1623 | handle_setup(ui); |
| 1624 | |
| 1625 | n = readl(USB_ENDPTCOMPLETE); |
| 1626 | writel(n, USB_ENDPTCOMPLETE); |
| 1627 | while (n) { |
| 1628 | unsigned bit = __ffs(n); |
| 1629 | handle_endpoint(ui, bit); |
| 1630 | n = n & (~(1 << bit)); |
| 1631 | } |
| 1632 | } |
| 1633 | |
| 1634 | n = readl(USB_OTGSC); |
| 1635 | writel(n, USB_OTGSC); |
| 1636 | |
| 1637 | if (n & OTGSC_BSVIS) { |
| 1638 | /*Verify B Session Valid Bit to verify vbus status*/ |
| 1639 | if (B_SESSION_VALID & n) { |
| 1640 | pr_info("usb cable connected\n"); |
| 1641 | ui->usb_state = USB_STATE_POWERED; |
| 1642 | ui->flags = USB_FLAG_VBUS_ONLINE; |
| 1643 | /* Wait for 100ms to stabilize VBUS before initializing |
| 1644 | * USB and detecting charger type |
| 1645 | */ |
| 1646 | queue_delayed_work(usb_work, &ui->work, 0); |
| 1647 | } else { |
| 1648 | int i; |
| 1649 | |
| 1650 | usb_disable_pullup(ui); |
| 1651 | |
| 1652 | printk(KERN_INFO "usb cable disconnected\n"); |
| 1653 | ui->usb_state = USB_STATE_NOTATTACHED; |
| 1654 | ui->configured = 0; |
| 1655 | for (i = 0; i < ui->num_funcs; i++) { |
| 1656 | struct usb_function_info *fi = ui->func[i]; |
| 1657 | if (!fi || |
| 1658 | !(ui->composition->functions & (1 << i))) |
| 1659 | continue; |
| 1660 | if (fi->func->disconnect) |
| 1661 | fi->func->disconnect |
| 1662 | (fi->func->context); |
| 1663 | } |
| 1664 | ui->flags = USB_FLAG_VBUS_OFFLINE; |
| 1665 | queue_delayed_work(usb_work, &ui->work, 0); |
| 1666 | } |
| 1667 | } |
| 1668 | |
| 1669 | return IRQ_HANDLED; |
| 1670 | } |
| 1671 | |
| 1672 | static void usb_prepare(struct usb_info *ui) |
| 1673 | { |
| 1674 | memset(ui->buf, 0, 4096); |
| 1675 | ui->head = (void *) (ui->buf + 0); |
| 1676 | |
| 1677 | /* only important for reset/reinit */ |
| 1678 | memset(ui->ept, 0, sizeof(ui->ept)); |
| 1679 | ui->next_item = 0; |
| 1680 | ui->speed = USB_SPEED_UNKNOWN; |
| 1681 | |
| 1682 | init_endpoints(ui); |
| 1683 | |
| 1684 | ui->ep0in.max_pkt = 64; |
| 1685 | ui->ep0in.ui = ui; |
| 1686 | ui->ep0in.alloced = 1; |
| 1687 | ui->ep0out.max_pkt = 64; |
| 1688 | ui->ep0out.ui = ui; |
| 1689 | ui->ep0out.alloced = 1; |
| 1690 | |
| 1691 | ui->setup_req = usb_ept_alloc_req(&ui->ep0in, SETUP_BUF_SIZE); |
| 1692 | ui->ep0out_req = usb_ept_alloc_req(&ui->ep0out, ui->ep0out.max_pkt); |
| 1693 | |
| 1694 | INIT_WORK(&ui->chg_stop, usb_chg_stop); |
| 1695 | INIT_WORK(&ui->li.wakeup_phy, usb_lpm_wakeup_phy); |
| 1696 | INIT_DELAYED_WORK(&ui->work, usb_do_work); |
| 1697 | INIT_DELAYED_WORK(&ui->chg_legacy_det, usb_chg_legacy_detect); |
| 1698 | } |
| 1699 | |
| 1700 | static int usb_is_online(struct usb_info *ui) |
| 1701 | { |
| 1702 | /* continue lpm if bus is suspended or disconnected or stopped*/ |
| 1703 | if (((readl(USB_PORTSC) & PORTSC_SUSP) == PORTSC_SUSP) || |
| 1704 | ((readl(USB_PORTSC) & PORTSC_CCS) == 0) || |
| 1705 | ((readl(USB_USBCMD) & USBCMD_RS) == 0)) |
| 1706 | return 0; |
| 1707 | |
| 1708 | pr_debug("usb is online\n"); |
| 1709 | pr_debug("usbcmd:(%08x) usbsts:(%08x) portsc:(%08x)\n", |
| 1710 | readl(USB_USBCMD), |
| 1711 | readl(USB_USBSTS), |
| 1712 | readl(USB_PORTSC)); |
| 1713 | return -1; |
| 1714 | } |
| 1715 | |
| 1716 | static int usb_wakeup_phy(struct usb_info *ui) |
| 1717 | { |
| 1718 | int i; |
| 1719 | |
| 1720 | writel(readl(USB_USBCMD) & ~ULPI_STP_CTRL, USB_USBCMD); |
| 1721 | |
| 1722 | /* some circuits automatically clear PHCD bit */ |
| 1723 | for (i = 0; i < 5 && (readl(USB_PORTSC) & PORTSC_PHCD); i++) { |
| 1724 | writel(readl(USB_PORTSC) & ~PORTSC_PHCD, USB_PORTSC); |
| 1725 | msleep(1); |
| 1726 | } |
| 1727 | |
| 1728 | if ((readl(USB_PORTSC) & PORTSC_PHCD)) { |
| 1729 | pr_err("%s: cannot clear phcd bit\n", __func__); |
| 1730 | return -1; |
| 1731 | } |
| 1732 | |
| 1733 | return 0; |
| 1734 | } |
| 1735 | |
| 1736 | static int usb_suspend_phy(struct usb_info *ui) |
| 1737 | { |
| 1738 | int i; |
| 1739 | unsigned long flags; |
| 1740 | |
| 1741 | if (usb_is_online(ui)) |
| 1742 | return -1; |
| 1743 | |
| 1744 | /* spec talks about following bits in LPM for external phy. |
| 1745 | * But they are ignored because |
| 1746 | * 1. disabling interface protection circuit: by disabling |
| 1747 | * interface protection curcuit we cannot come out |
| 1748 | * of lpm as async interrupts would be disabled |
| 1749 | * 2. setting the suspendM bit: this bit would be set by usb |
| 1750 | * controller once we set phcd bit. |
| 1751 | */ |
| 1752 | switch (PHY_TYPE(ui->phy_info)) { |
| 1753 | case USB_PHY_INTEGRATED: |
| 1754 | if (!is_phy_45nm()) |
| 1755 | ulpi_read(ui, 0x14); |
| 1756 | |
| 1757 | /* turn on/off otg comparators */ |
| 1758 | if (ui->vbus_sn_notif && |
| 1759 | ui->usb_state == USB_STATE_NOTATTACHED) |
| 1760 | ulpi_write(ui, 0x00, 0x30); |
| 1761 | else |
| 1762 | ulpi_write(ui, 0x01, 0x30); |
| 1763 | |
| 1764 | if (!is_phy_45nm()) |
| 1765 | ulpi_write(ui, 0x08, 0x09); |
| 1766 | |
| 1767 | break; |
| 1768 | |
| 1769 | case USB_PHY_UNDEFINED: |
| 1770 | pr_err("%s: undefined phy type\n", __func__); |
| 1771 | return -1; |
| 1772 | } |
| 1773 | |
| 1774 | /* loop for large amount of time */ |
| 1775 | for (i = 0; i < 500; i++) { |
| 1776 | spin_lock_irqsave(&ui->lock, flags); |
| 1777 | if (usb_is_online(ui)) { |
| 1778 | spin_unlock_irqrestore(&ui->lock, flags); |
| 1779 | return -1; |
| 1780 | } |
| 1781 | /* set phy to be in lpm */ |
| 1782 | writel(readl(USB_PORTSC) | PORTSC_PHCD, USB_PORTSC); |
| 1783 | spin_unlock_irqrestore(&ui->lock, flags); |
| 1784 | |
| 1785 | msleep(1); |
| 1786 | if (readl(USB_PORTSC) & PORTSC_PHCD) |
| 1787 | goto blk_stp_sig; |
| 1788 | } |
| 1789 | |
| 1790 | if (!(readl(USB_PORTSC) & PORTSC_PHCD)) { |
| 1791 | pr_err("unable to set phcd of portsc reg\n"); |
| 1792 | pr_err("Reset HW link and phy to recover from phcd error\n"); |
| 1793 | usb_hw_reset(ui); |
| 1794 | return -1; |
| 1795 | } |
| 1796 | |
| 1797 | /* we have to set this bit again to work-around h/w bug */ |
| 1798 | writel(readl(USB_PORTSC) | PORTSC_PHCD, USB_PORTSC); |
| 1799 | |
| 1800 | blk_stp_sig: |
| 1801 | /* block the stop signal */ |
| 1802 | writel(readl(USB_USBCMD) | ULPI_STP_CTRL, USB_USBCMD); |
| 1803 | |
| 1804 | return 0; |
| 1805 | } |
| 1806 | |
| 1807 | /* SW workarounds |
| 1808 | Issue#2 - Integrated PHY Calibration |
| 1809 | Symptom - Electrical compliance failure in eye-diagram tests |
| 1810 | SW workaround - Try to raise amplitude to 400mV |
| 1811 | |
| 1812 | Issue#3 - AHB Posted Writes |
| 1813 | Symptom - USB stability |
| 1814 | SW workaround - This programs xtor ON, BURST disabled and |
| 1815 | unspecified length of INCR burst enabled |
| 1816 | */ |
| 1817 | static int usb_hw_reset(struct usb_info *ui) |
| 1818 | { |
| 1819 | unsigned i; |
| 1820 | struct msm_hsusb_platform_data *pdata; |
| 1821 | unsigned long timeout; |
| 1822 | unsigned val = 0; |
| 1823 | |
| 1824 | pdata = ui->pdev->dev.platform_data; |
| 1825 | |
| 1826 | clk_enable(ui->clk); |
| 1827 | /* reset the phy before resetting link */ |
| 1828 | if (readl(USB_PORTSC) & PORTSC_PHCD) |
| 1829 | usb_wakeup_phy(ui); |
| 1830 | /* rpc call for phy_reset */ |
| 1831 | if (ui->pdata->phy_reset) |
| 1832 | ui->pdata->phy_reset(ui->addr); |
| 1833 | else |
| 1834 | msm_hsusb_phy_reset(); |
| 1835 | /* Give some delay to settle phy after reset */ |
| 1836 | msleep(100); |
| 1837 | |
| 1838 | /* RESET */ |
| 1839 | writel(USBCMD_RESET, USB_USBCMD); |
| 1840 | timeout = jiffies + USB_LINK_RESET_TIMEOUT; |
| 1841 | while (readl(USB_USBCMD) & USBCMD_RESET) { |
| 1842 | if (time_after(jiffies, timeout)) { |
| 1843 | dev_err(&ui->pdev->dev, "usb link reset timeout\n"); |
| 1844 | break; |
| 1845 | } |
| 1846 | msleep(1); |
| 1847 | } |
| 1848 | |
| 1849 | /* select DEVICE mode with SDIS active */ |
| 1850 | writel((USBMODE_SDIS | USBMODE_DEVICE), USB_USBMODE); |
| 1851 | msleep(1); |
| 1852 | |
| 1853 | /* select ULPI phy */ |
| 1854 | i = (readl(USB_PORTSC) & ~PORTSC_PTS); |
| 1855 | writel(i | PORTSC_PTS_ULPI, USB_PORTSC); |
| 1856 | /* set usb controller interrupt latency to zero*/ |
| 1857 | writel((readl(USB_USBCMD) & ~USBCMD_ITC_MASK) | USBCMD_ITC(0), |
| 1858 | USB_USBCMD); |
| 1859 | |
| 1860 | /* If the target is 7x01 and roc version is > 1.2, set |
| 1861 | * the AHB mode to 2 for maximum performance, else set |
| 1862 | * it to 1, to bypass the AHB transactor for stability. |
| 1863 | */ |
| 1864 | if (PHY_TYPE(ui->phy_info) == USB_PHY_EXTERNAL) { |
| 1865 | if (pdata->soc_version >= SOC_ROC_2_0) |
| 1866 | writel(0x02, USB_ROC_AHB_MODE); |
| 1867 | else |
| 1868 | writel(0x01, USB_ROC_AHB_MODE); |
| 1869 | } else { |
| 1870 | unsigned cfg_val; |
| 1871 | |
| 1872 | /* Raise amplitude to 400mV |
| 1873 | * SW workaround, Issue#2 |
| 1874 | */ |
| 1875 | cfg_val = ulpi_read(ui, ULPI_CONFIG_REG); |
| 1876 | cfg_val |= ULPI_AMPLITUDE_MAX; |
| 1877 | ulpi_write(ui, cfg_val, ULPI_CONFIG_REG); |
| 1878 | |
| 1879 | writel(0x0, USB_AHB_BURST); |
| 1880 | writel(0x00, USB_AHB_MODE); |
| 1881 | } |
| 1882 | |
| 1883 | /* TBD: do we have to add DpRise, ChargerRise and |
| 1884 | * IdFloatRise for 45nm |
| 1885 | */ |
| 1886 | /* Disable VbusValid and SessionEnd comparators */ |
| 1887 | val = ULPI_VBUS_VALID | ULPI_SESS_END; |
| 1888 | |
| 1889 | /* enable id interrupt only when transceiver is available */ |
| 1890 | if (ui->xceiv) |
| 1891 | writel(readl(USB_OTGSC) | OTGSC_BSVIE | OTGSC_IDIE, USB_OTGSC); |
| 1892 | else { |
| 1893 | writel((readl(USB_OTGSC) | OTGSC_BSVIE) & ~OTGSC_IDPU, |
| 1894 | USB_OTGSC); |
| 1895 | ulpi_write(ui, ULPI_IDPU, ULPI_OTG_CTRL_CLR); |
| 1896 | val |= ULPI_HOST_DISCONNECT | ULPI_ID_GND; |
| 1897 | } |
| 1898 | ulpi_write(ui, val, ULPI_INT_RISE_CLR); |
| 1899 | ulpi_write(ui, val, ULPI_INT_FALL_CLR); |
| 1900 | |
| 1901 | /* we are just setting the pointer in the hwblock. Since the |
| 1902 | * endpoint isnt enabled the hw block doenst read the contents |
| 1903 | * of ui->dma - so we dont need a barrier here |
| 1904 | * */ |
| 1905 | writel(ui->dma, USB_ENDPOINTLISTADDR); |
| 1906 | |
| 1907 | clk_disable(ui->clk); |
| 1908 | |
| 1909 | return 0; |
| 1910 | } |
| 1911 | |
| 1912 | static void usb_reset(struct usb_info *ui) |
| 1913 | { |
| 1914 | unsigned long flags; |
| 1915 | |
| 1916 | spin_lock_irqsave(&ui->lock, flags); |
| 1917 | ui->running = 0; |
| 1918 | spin_unlock_irqrestore(&ui->lock, flags); |
| 1919 | |
| 1920 | #if 0 |
| 1921 | /* we should flush and shutdown cleanly if already running */ |
| 1922 | writel(0xffffffff, USB_ENDPTFLUSH); |
| 1923 | msleep(2); |
| 1924 | #endif |
| 1925 | |
| 1926 | if (usb_hw_reset(ui)) { |
| 1927 | pr_info("%s: h/w reset failed\n", __func__); |
| 1928 | return; |
| 1929 | } |
| 1930 | |
| 1931 | usb_configure_endpoint(&ui->ep0in, NULL); |
| 1932 | usb_configure_endpoint(&ui->ep0out, NULL); |
| 1933 | |
| 1934 | /* marking us offline will cause ept queue attempts to fail */ |
| 1935 | ui->online = 0; |
| 1936 | |
| 1937 | /* terminate any pending transactions */ |
| 1938 | flush_all_endpoints(ui); |
| 1939 | |
| 1940 | set_configuration(ui, 0); |
| 1941 | |
| 1942 | spin_lock_irqsave(&ui->lock, flags); |
| 1943 | ui->running = 1; |
| 1944 | spin_unlock_irqrestore(&ui->lock, flags); |
| 1945 | } |
| 1946 | |
| 1947 | static void usb_enable(void *handle, int enable) |
| 1948 | { |
| 1949 | struct usb_info *ui = handle; |
| 1950 | unsigned long flags; |
| 1951 | spin_lock_irqsave(&ui->lock, flags); |
| 1952 | |
| 1953 | if (enable) { |
| 1954 | ui->flags |= USB_FLAG_RESET; |
| 1955 | ui->active = 1; |
| 1956 | spin_unlock_irqrestore(&ui->lock, flags); |
| 1957 | usb_do_work(&ui->work.work); |
| 1958 | } else { |
| 1959 | ui->active = 0; |
| 1960 | spin_unlock_irqrestore(&ui->lock, flags); |
| 1961 | usb_clk_disable(ui); |
| 1962 | msm_hsusb_suspend_locks_acquire(ui, 0); |
| 1963 | } |
| 1964 | } |
| 1965 | |
| 1966 | static struct msm_otg_ops dcd_ops = { |
| 1967 | .request = usb_enable, |
| 1968 | }; |
| 1969 | |
| 1970 | void usb_start(struct usb_info *ui) |
| 1971 | { |
| 1972 | int i, ret; |
| 1973 | |
| 1974 | for (i = 0; i < ui->num_funcs; i++) { |
| 1975 | struct usb_function_info *fi = ui->func[i]; |
| 1976 | if (!fi || !(ui->composition->functions & (1<<i))) |
| 1977 | continue; |
| 1978 | if (fi->enabled) { |
| 1979 | pr_info("usb_bind_func() (%s)\n", fi->func->name); |
| 1980 | fi->func->bind(fi->func->context); |
| 1981 | } |
| 1982 | } |
| 1983 | |
| 1984 | ui->clk_enabled = 0; |
| 1985 | ui->vreg_enabled = 0; |
| 1986 | |
| 1987 | ui->xceiv = msm_otg_get_transceiver(); |
| 1988 | if (ui->xceiv) { |
| 1989 | ui->flags = USB_FLAG_REG_OTG; |
| 1990 | queue_delayed_work(usb_work, &ui->work, 0); |
| 1991 | } else { |
| 1992 | /*Initialize pm app RPC */ |
| 1993 | ret = msm_pm_app_rpc_init(); |
| 1994 | if (ret) { |
| 1995 | pr_err("%s: pm_app_rpc connect failed\n", __func__); |
| 1996 | goto out; |
| 1997 | } |
| 1998 | pr_info("%s: pm_app_rpc connect success\n", __func__); |
| 1999 | |
| 2000 | ret = msm_pm_app_register_vbus_sn(&msm_hsusb_set_vbus_state); |
| 2001 | if (ret) { |
| 2002 | pr_err("%s:PMIC VBUS SN notif not supported\n", \ |
| 2003 | __func__); |
| 2004 | msm_pm_app_rpc_deinit(); |
| 2005 | goto out; |
| 2006 | } |
| 2007 | pr_info("%s:PMIC VBUS SN notif supported\n", \ |
| 2008 | __func__); |
| 2009 | |
| 2010 | ret = msm_pm_app_enable_usb_ldo(1); |
| 2011 | if (ret) { |
| 2012 | pr_err("%s: unable to turn on internal LDO", \ |
| 2013 | __func__); |
| 2014 | msm_pm_app_unregister_vbus_sn( |
| 2015 | &msm_hsusb_set_vbus_state); |
| 2016 | msm_pm_app_rpc_deinit(); |
| 2017 | goto out; |
| 2018 | } |
| 2019 | ui->vbus_sn_notif = 1; |
| 2020 | out: |
| 2021 | ui->active = 1; |
| 2022 | ui->flags |= (USB_FLAG_START | USB_FLAG_RESET); |
| 2023 | queue_delayed_work(usb_work, &ui->work, 0); |
| 2024 | } |
| 2025 | |
| 2026 | } |
| 2027 | |
| 2028 | static LIST_HEAD(usb_function_list); |
| 2029 | static DEFINE_MUTEX(usb_function_list_lock); |
| 2030 | |
| 2031 | |
| 2032 | static struct usb_function_info *usb_find_function(const char *name) |
| 2033 | { |
| 2034 | struct list_head *entry; |
| 2035 | list_for_each(entry, &usb_function_list) { |
| 2036 | struct usb_function_info *fi = |
| 2037 | list_entry(entry, struct usb_function_info, list); |
| 2038 | if (fi) { |
| 2039 | if (!strcmp(name, fi->func->name)) |
| 2040 | return fi; |
| 2041 | } |
| 2042 | } |
| 2043 | |
| 2044 | return NULL; |
| 2045 | } |
| 2046 | |
| 2047 | static void usb_try_to_bind(void) |
| 2048 | { |
| 2049 | struct usb_info *ui = the_usb_info; |
| 2050 | unsigned long enabled_functions = 0; |
| 2051 | int i; |
| 2052 | |
| 2053 | if (!ui || ui->bound || !ui->pdev || !ui->composition) |
| 2054 | return; |
| 2055 | |
| 2056 | for (i = 0; i < ui->num_funcs; i++) { |
| 2057 | if (ui->func[i]) |
| 2058 | enabled_functions |= (1 << i); |
| 2059 | } |
| 2060 | if ((enabled_functions & ui->composition->functions) |
| 2061 | != ui->composition->functions) |
| 2062 | return; |
| 2063 | |
| 2064 | usb_set_composition(ui->composition->product_id); |
| 2065 | usb_configure_device_descriptor(ui); |
| 2066 | |
| 2067 | /* we have found all the needed functions */ |
| 2068 | ui->bound = 1; |
| 2069 | printk(KERN_INFO "msm_hsusb: functions bound. starting.\n"); |
| 2070 | usb_start(ui); |
| 2071 | } |
| 2072 | |
| 2073 | static int usb_get_function_index(const char *name) |
| 2074 | { |
| 2075 | struct usb_info *ui = the_usb_info; |
| 2076 | int i; |
| 2077 | |
| 2078 | for (i = 0; i < ui->num_funcs; i++) { |
| 2079 | if (!strcmp(name, ui->functions_map[i].name)) |
| 2080 | return i; |
| 2081 | } |
| 2082 | return -1; |
| 2083 | } |
| 2084 | |
| 2085 | int usb_function_register(struct usb_function *driver) |
| 2086 | { |
| 2087 | struct usb_info *ui = the_usb_info; |
| 2088 | struct usb_function_info *fi; |
| 2089 | int ret = 0; |
| 2090 | int index; |
| 2091 | |
| 2092 | mutex_lock(&usb_function_list_lock); |
| 2093 | |
| 2094 | index = usb_get_function_index(driver->name); |
| 2095 | if (index < 0) { |
| 2096 | pr_err("%s: unsupported function = %s\n", |
| 2097 | __func__, driver->name); |
| 2098 | ret = -EINVAL; |
| 2099 | goto fail; |
| 2100 | } |
| 2101 | |
| 2102 | fi = kzalloc(sizeof(*fi), GFP_KERNEL); |
| 2103 | if (!fi) { |
| 2104 | ret = -ENOMEM; |
| 2105 | goto fail; |
| 2106 | } |
| 2107 | |
| 2108 | fi->func = driver; |
| 2109 | list_add(&fi->list, &usb_function_list); |
| 2110 | ui->func[index] = fi; |
| 2111 | fi->func->ep0_out_req = ui->ep0out_req; |
| 2112 | fi->func->ep0_in_req = ui->setup_req; |
| 2113 | fi->func->ep0_out = &ui->ep0out; |
| 2114 | fi->func->ep0_in = &ui->ep0in; |
| 2115 | pr_info("%s: name = '%s', map = %d\n", __func__, driver->name, index); |
| 2116 | |
| 2117 | usb_try_to_bind(); |
| 2118 | fail: |
| 2119 | mutex_unlock(&usb_function_list_lock); |
| 2120 | return ret; |
| 2121 | } |
| 2122 | EXPORT_SYMBOL(usb_function_register); |
| 2123 | |
| 2124 | static unsigned short usb_validate_product_id(unsigned short pid) |
| 2125 | { |
| 2126 | struct usb_info *ui = the_usb_info; |
| 2127 | int i; |
| 2128 | |
| 2129 | if (!ui || !ui->pdata) |
| 2130 | return -1; |
| 2131 | |
| 2132 | /* set idProduct based on which functions are enabled */ |
| 2133 | for (i = 0; i < ui->pdata->num_compositions; i++) { |
| 2134 | if (ui->pdata->compositions[i].product_id == pid) |
| 2135 | break; |
| 2136 | } |
| 2137 | |
| 2138 | if (i < ui->pdata->num_compositions) { |
| 2139 | struct usb_composition *comp = &ui->pdata->compositions[i]; |
| 2140 | for (i = 0; i < ui->num_funcs; i++) { |
| 2141 | if (comp->functions & (1 << i)) { |
| 2142 | if (!ui->func[i]) { |
| 2143 | pr_err("%s: func(%d) not available\n", |
| 2144 | __func__, i); |
| 2145 | return 0; |
| 2146 | } |
| 2147 | } |
| 2148 | } |
| 2149 | return comp->product_id; |
| 2150 | } else |
| 2151 | pr_err("%s: Product id (%x) is not supported\n", __func__, pid); |
| 2152 | return 0; |
| 2153 | } |
| 2154 | |
| 2155 | static unsigned short usb_get_product_id(unsigned long enabled_functions) |
| 2156 | { |
| 2157 | struct usb_info *ui = the_usb_info; |
| 2158 | int i; |
| 2159 | |
| 2160 | if (!(ui && ui->pdata)) |
| 2161 | return -1; |
| 2162 | |
| 2163 | /* set idProduct based on which functions are enabled */ |
| 2164 | for (i = 0; i < ui->pdata->num_compositions; i++) { |
| 2165 | if (ui->pdata->compositions[i].functions == enabled_functions) |
| 2166 | return ui->pdata->compositions[i].product_id; |
| 2167 | } |
| 2168 | return 0; |
| 2169 | } |
| 2170 | |
| 2171 | static void usb_uninit(struct usb_info *ui) |
| 2172 | { |
| 2173 | int i; |
| 2174 | |
| 2175 | for (i = 0; i < ui->strdesc_index; i++) |
| 2176 | kfree(ui->strdesc[i]); |
| 2177 | ui->strdesc_index = 1; |
| 2178 | ui->next_ifc_num = 0; |
| 2179 | } |
| 2180 | |
| 2181 | static unsigned short usb_set_composition(unsigned short pid) |
| 2182 | { |
| 2183 | struct usb_info *ui = the_usb_info; |
| 2184 | int i; |
| 2185 | |
| 2186 | if (!(ui && ui->pdata)) |
| 2187 | return 0; |
| 2188 | |
| 2189 | /* Retrieve product id on enabled functions */ |
| 2190 | for (i = 0; i < ui->pdata->num_compositions; i++) { |
| 2191 | if (ui->pdata->compositions[i].product_id == pid) { |
| 2192 | ui->composition = &ui->pdata->compositions[i]; |
| 2193 | for (i = 0; i < ui->num_funcs; i++) { |
| 2194 | struct usb_function_info *fi = ui->func[i]; |
| 2195 | if (ui->func && fi && fi->func) { |
| 2196 | fi->enabled = (ui->composition-> |
| 2197 | functions >> i) & 1; |
| 2198 | } |
| 2199 | } |
| 2200 | pr_info("%s: composition set to product id = %x\n", |
| 2201 | __func__, ui->composition->product_id); |
| 2202 | return ui->composition->product_id; |
| 2203 | } |
| 2204 | } |
| 2205 | pr_err("%s: product id (%x) not supported\n", __func__, pid); |
| 2206 | return 0; |
| 2207 | } |
| 2208 | |
| 2209 | static void usb_switch_composition(unsigned short pid) |
| 2210 | { |
| 2211 | struct usb_info *ui = the_usb_info; |
| 2212 | int i; |
| 2213 | unsigned long flags; |
| 2214 | |
| 2215 | |
| 2216 | if (!ui->active) |
| 2217 | return; |
| 2218 | if (!usb_validate_product_id(pid)) |
| 2219 | return; |
| 2220 | |
| 2221 | disable_irq(ui->irq); |
| 2222 | if (cancel_delayed_work_sync(&ui->work)) |
| 2223 | pr_info("%s: Removed work successfully\n", __func__); |
| 2224 | if (ui->running) { |
| 2225 | spin_lock_irqsave(&ui->lock, flags); |
| 2226 | ui->running = 0; |
| 2227 | ui->online = 0; |
| 2228 | ui->bound = 0; |
| 2229 | spin_unlock_irqrestore(&ui->lock, flags); |
| 2230 | /* we should come out of lpm to access registers */ |
| 2231 | if (ui->in_lpm) { |
| 2232 | if (PHY_TYPE(ui->phy_info) == USB_PHY_EXTERNAL) { |
| 2233 | disable_irq(ui->gpio_irq[0]); |
| 2234 | disable_irq(ui->gpio_irq[1]); |
| 2235 | } |
| 2236 | |
| 2237 | if (ui->usb_state == USB_STATE_NOTATTACHED |
| 2238 | && ui->vbus_sn_notif) |
| 2239 | msm_pm_app_enable_usb_ldo(1); |
| 2240 | |
| 2241 | usb_lpm_exit(ui); |
| 2242 | if (cancel_work_sync(&ui->li.wakeup_phy)) |
| 2243 | usb_lpm_wakeup_phy(NULL); |
| 2244 | ui->in_lpm = 0; |
| 2245 | } |
| 2246 | /* disable usb and session valid interrupts */ |
| 2247 | writel(0, USB_USBINTR); |
| 2248 | writel(readl(USB_OTGSC) & ~OTGSC_BSVIE, USB_OTGSC); |
| 2249 | |
| 2250 | /* stop the controller */ |
| 2251 | usb_disable_pullup(ui); |
| 2252 | ui->usb_state = USB_STATE_NOTATTACHED; |
| 2253 | switch_set_state(&ui->sdev, 0); |
| 2254 | /* Before starting again, wait for 300ms |
| 2255 | * to make sure host detects soft disconnection |
| 2256 | **/ |
| 2257 | msleep(300); |
| 2258 | } |
| 2259 | |
| 2260 | for (i = 0; i < ui->num_funcs; i++) { |
| 2261 | struct usb_function_info *fi = ui->func[i]; |
| 2262 | if (!fi || !fi->func || !fi->enabled) |
| 2263 | continue; |
| 2264 | if (fi->func->configure) |
| 2265 | fi->func->configure(0, fi->func->context); |
| 2266 | if (fi->func->unbind) |
| 2267 | fi->func->unbind(fi->func->context); |
| 2268 | } |
| 2269 | |
| 2270 | usb_uninit(ui); |
| 2271 | usb_set_composition(pid); |
| 2272 | usb_configure_device_descriptor(ui); |
| 2273 | |
| 2274 | /* initialize functions */ |
| 2275 | for (i = 0; i < ui->num_funcs; i++) { |
| 2276 | struct usb_function_info *fi = ui->func[i]; |
| 2277 | if (!fi || !(ui->composition->functions & (1 << i))) |
| 2278 | continue; |
| 2279 | if (fi->enabled) { |
| 2280 | if (fi->func->bind) |
| 2281 | fi->func->bind(fi->func->context); |
| 2282 | } |
| 2283 | } |
| 2284 | |
| 2285 | ui->bound = 1; |
| 2286 | ui->flags = USB_FLAG_RESET; |
| 2287 | queue_delayed_work(usb_work, &ui->work, 0); |
| 2288 | enable_irq(ui->irq); |
| 2289 | } |
| 2290 | |
| 2291 | void usb_function_enable(const char *function, int enable) |
| 2292 | { |
| 2293 | struct usb_function_info *fi; |
| 2294 | struct usb_info *ui = the_usb_info; |
| 2295 | unsigned long functions_mask; |
| 2296 | int curr_enable; |
| 2297 | unsigned short pid; |
| 2298 | int i; |
| 2299 | |
| 2300 | if (!ui) |
| 2301 | return; |
| 2302 | |
| 2303 | pr_info("%s: name = %s, enable = %d\n", __func__, function, enable); |
| 2304 | |
| 2305 | fi = usb_find_function(function); |
| 2306 | if (!fi) { |
| 2307 | pr_err("%s: function (%s) not registered with DCD\n", |
| 2308 | __func__, function); |
| 2309 | return; |
| 2310 | } |
| 2311 | if (fi->enabled == enable) { |
| 2312 | pr_err("%s: function (%s) state is same\n", |
| 2313 | __func__, function); |
| 2314 | return; |
| 2315 | } |
| 2316 | functions_mask = 0; |
| 2317 | curr_enable = fi->enabled; |
| 2318 | fi->enabled = enable; |
| 2319 | for (i = 0; i < ui->num_funcs; i++) { |
| 2320 | struct usb_function_info *fi = ui->func[i]; |
| 2321 | if (fi && fi->enabled) |
| 2322 | functions_mask |= (1 << i); |
| 2323 | } |
| 2324 | |
| 2325 | pid = usb_get_product_id(functions_mask); |
| 2326 | if (!pid) { |
| 2327 | fi->enabled = curr_enable; |
| 2328 | pr_err("%s: mask (%lx) not matching with any products\n", |
| 2329 | __func__, functions_mask); |
| 2330 | pr_err("%s: continuing with current composition\n", __func__); |
| 2331 | return; |
| 2332 | } |
| 2333 | usb_switch_composition(pid); |
| 2334 | } |
| 2335 | EXPORT_SYMBOL(usb_function_enable); |
| 2336 | |
| 2337 | static int usb_free(struct usb_info *ui, int ret) |
| 2338 | { |
| 2339 | disable_irq_wake(ui->irq); |
| 2340 | free_irq(ui->irq, ui); |
| 2341 | if (ui->gpio_irq[0]) |
| 2342 | free_irq(ui->gpio_irq[0], NULL); |
| 2343 | if (ui->gpio_irq[1]) |
| 2344 | free_irq(ui->gpio_irq[1], NULL); |
| 2345 | |
| 2346 | dma_pool_destroy(ui->pool); |
| 2347 | dma_free_coherent(&ui->pdev->dev, 4096, ui->buf, ui->dma); |
| 2348 | kfree(ui->func); |
| 2349 | kfree(ui->strdesc); |
| 2350 | iounmap(ui->addr); |
| 2351 | clk_put(ui->clk); |
| 2352 | clk_put(ui->pclk); |
| 2353 | clk_put(ui->cclk); |
| 2354 | msm_hsusb_suspend_locks_init(ui, 0); |
| 2355 | kfree(ui); |
| 2356 | |
| 2357 | return ret; |
| 2358 | } |
| 2359 | |
| 2360 | static int usb_vbus_is_on(struct usb_info *ui) |
| 2361 | { |
| 2362 | unsigned tmp; |
| 2363 | |
| 2364 | /* disable session valid raising and falling interrupts */ |
| 2365 | ulpi_write(ui, ULPI_SESSION_VALID_RAISE, ULPI_USBINTR_ENABLE_RASING_C); |
| 2366 | ulpi_write(ui, ULPI_SESSION_VALID_FALL, ULPI_USBINTR_ENABLE_FALLING_C); |
| 2367 | |
| 2368 | tmp = ulpi_read(ui, ULPI_USBINTR_STATUS); |
| 2369 | |
| 2370 | /* enable session valid raising and falling interrupts */ |
| 2371 | ulpi_write(ui, ULPI_SESSION_VALID_RAISE, ULPI_USBINTR_ENABLE_RASING_S); |
| 2372 | ulpi_write(ui, ULPI_SESSION_VALID_FALL, ULPI_USBINTR_ENABLE_FALLING_S); |
| 2373 | |
| 2374 | if (tmp & (1 << 2)) |
| 2375 | return 1; |
| 2376 | return 0; |
| 2377 | } |
| 2378 | static void usb_do_work(struct work_struct *w) |
| 2379 | { |
| 2380 | struct usb_info *ui = container_of(w, struct usb_info, work.work); |
| 2381 | unsigned long iflags; |
| 2382 | unsigned long flags, ret; |
| 2383 | |
| 2384 | for (;;) { |
| 2385 | spin_lock_irqsave(&ui->lock, iflags); |
| 2386 | flags = ui->flags; |
| 2387 | ui->flags = 0; |
| 2388 | spin_unlock_irqrestore(&ui->lock, iflags); |
| 2389 | |
| 2390 | /* give up if we have nothing to do */ |
| 2391 | if (flags == 0) |
| 2392 | break; |
| 2393 | |
| 2394 | switch (ui->state) { |
| 2395 | case USB_STATE_IDLE: |
| 2396 | if (flags & USB_FLAG_REG_OTG) { |
| 2397 | dcd_ops.handle = (void *) ui; |
| 2398 | ret = ui->xceiv->set_peripheral(ui->xceiv, |
| 2399 | &dcd_ops); |
| 2400 | if (ret) |
| 2401 | pr_err("%s: Can't register peripheral" |
| 2402 | "driver with OTG", __func__); |
| 2403 | break; |
| 2404 | } |
| 2405 | if ((flags & USB_FLAG_START) || |
| 2406 | (flags & USB_FLAG_RESET)) { |
| 2407 | disable_irq(ui->irq); |
| 2408 | if (ui->vbus_sn_notif) |
| 2409 | msm_pm_app_enable_usb_ldo(1); |
| 2410 | usb_clk_enable(ui); |
| 2411 | usb_vreg_enable(ui); |
| 2412 | usb_vbus_online(ui); |
| 2413 | |
| 2414 | /* if VBUS is present move to ONLINE state |
| 2415 | * otherwise move to OFFLINE state |
| 2416 | */ |
| 2417 | if (usb_vbus_is_on(ui)) { |
| 2418 | ui->usb_state = USB_STATE_POWERED; |
| 2419 | msm_hsusb_suspend_locks_acquire(ui, 1); |
| 2420 | ui->state = USB_STATE_ONLINE; |
| 2421 | usb_enable_pullup(ui); |
| 2422 | schedule_delayed_work( |
| 2423 | &ui->chg_legacy_det, |
| 2424 | USB_CHG_DET_DELAY); |
| 2425 | pr_info("hsusb: IDLE -> ONLINE\n"); |
| 2426 | } else { |
| 2427 | ui->usb_state = USB_STATE_NOTATTACHED; |
| 2428 | ui->state = USB_STATE_OFFLINE; |
| 2429 | |
| 2430 | msleep(500); |
| 2431 | usb_lpm_enter(ui); |
| 2432 | pr_info("hsusb: IDLE -> OFFLINE\n"); |
| 2433 | if (ui->vbus_sn_notif) |
| 2434 | msm_pm_app_enable_usb_ldo(0); |
| 2435 | } |
| 2436 | enable_irq(ui->irq); |
| 2437 | break; |
| 2438 | } |
| 2439 | goto reset; |
| 2440 | |
| 2441 | case USB_STATE_ONLINE: |
| 2442 | /* If at any point when we were online, we received |
| 2443 | * the signal to go offline, we must honor it |
| 2444 | */ |
| 2445 | if (flags & USB_FLAG_VBUS_OFFLINE) { |
| 2446 | enum charger_type temp; |
| 2447 | unsigned long f; |
| 2448 | |
| 2449 | cancel_delayed_work_sync(&ui->chg_legacy_det); |
| 2450 | |
| 2451 | spin_lock_irqsave(&ui->lock, f); |
| 2452 | temp = ui->chg_type; |
| 2453 | ui->chg_type = USB_CHG_TYPE__INVALID; |
| 2454 | spin_unlock_irqrestore(&ui->lock, f); |
| 2455 | |
| 2456 | if (temp != USB_CHG_TYPE__INVALID) { |
| 2457 | /* re-acquire wakelock and restore axi |
| 2458 | * freq if they have been reduced by |
| 2459 | * charger work item |
| 2460 | */ |
| 2461 | msm_hsusb_suspend_locks_acquire(ui, 1); |
| 2462 | |
| 2463 | msm_chg_usb_i_is_not_available(); |
| 2464 | msm_chg_usb_charger_disconnected(); |
| 2465 | } |
| 2466 | |
| 2467 | /* reset usb core and usb phy */ |
| 2468 | disable_irq(ui->irq); |
| 2469 | if (ui->in_lpm) |
| 2470 | usb_lpm_exit(ui); |
| 2471 | usb_vbus_offline(ui); |
| 2472 | usb_lpm_enter(ui); |
| 2473 | if ((ui->vbus_sn_notif) && |
| 2474 | (ui->usb_state == USB_STATE_NOTATTACHED)) |
| 2475 | msm_pm_app_enable_usb_ldo(0); |
| 2476 | ui->state = USB_STATE_OFFLINE; |
| 2477 | enable_irq(ui->irq); |
| 2478 | switch_set_state(&ui->sdev, 0); |
| 2479 | pr_info("hsusb: ONLINE -> OFFLINE\n"); |
| 2480 | break; |
| 2481 | } |
| 2482 | if (flags & USB_FLAG_SUSPEND) { |
| 2483 | ui->usb_state = USB_STATE_SUSPENDED; |
| 2484 | usb_lpm_enter(ui); |
| 2485 | msm_hsusb_suspend_locks_acquire(ui, 1); |
| 2486 | break; |
| 2487 | } |
| 2488 | if ((flags & USB_FLAG_RESUME) || |
| 2489 | (flags & USB_FLAG_CONFIGURE)) { |
| 2490 | int maxpower = usb_get_max_power(ui); |
| 2491 | |
| 2492 | if (maxpower > 0) |
| 2493 | msm_chg_usb_i_is_available(maxpower); |
| 2494 | |
| 2495 | if (flags & USB_FLAG_CONFIGURE) |
| 2496 | switch_set_state(&ui->sdev, 1); |
| 2497 | |
| 2498 | break; |
| 2499 | } |
| 2500 | goto reset; |
| 2501 | |
| 2502 | case USB_STATE_OFFLINE: |
| 2503 | /* If we were signaled to go online and vbus is still |
| 2504 | * present when we received the signal, go online. |
| 2505 | */ |
| 2506 | if ((flags & USB_FLAG_VBUS_ONLINE)) { |
| 2507 | msm_hsusb_suspend_locks_acquire(ui, 1); |
| 2508 | disable_irq(ui->irq); |
| 2509 | ui->state = USB_STATE_ONLINE; |
| 2510 | if (ui->in_lpm) |
| 2511 | usb_lpm_exit(ui); |
| 2512 | usb_vbus_online(ui); |
| 2513 | if (!(B_SESSION_VALID & readl(USB_OTGSC))) { |
| 2514 | writel(((readl(USB_OTGSC) & |
| 2515 | ~OTGSC_INTR_STS_MASK) | |
| 2516 | OTGSC_BSVIS), USB_OTGSC); |
| 2517 | enable_irq(ui->irq); |
| 2518 | goto reset; |
| 2519 | } |
| 2520 | usb_enable_pullup(ui); |
| 2521 | schedule_delayed_work( |
| 2522 | &ui->chg_legacy_det, |
| 2523 | USB_CHG_DET_DELAY); |
| 2524 | pr_info("hsusb: OFFLINE -> ONLINE\n"); |
| 2525 | enable_irq(ui->irq); |
| 2526 | break; |
| 2527 | } |
| 2528 | if (flags & USB_FLAG_SUSPEND) { |
| 2529 | usb_lpm_enter(ui); |
| 2530 | wake_unlock(&ui->wlock); |
| 2531 | break; |
| 2532 | } |
| 2533 | default: |
| 2534 | reset: |
| 2535 | /* For RESET or any unknown flag in a particular state |
| 2536 | * go to IDLE state and reset HW to bring to known state |
| 2537 | */ |
| 2538 | ui->flags = USB_FLAG_RESET; |
| 2539 | ui->state = USB_STATE_IDLE; |
| 2540 | } |
| 2541 | } |
| 2542 | } |
| 2543 | |
| 2544 | void msm_hsusb_set_vbus_state(int online) |
| 2545 | { |
| 2546 | struct usb_info *ui = the_usb_info; |
| 2547 | |
| 2548 | if (ui && online) { |
| 2549 | msm_pm_app_enable_usb_ldo(1); |
| 2550 | usb_lpm_exit(ui); |
| 2551 | /* Turn on PHY comparators */ |
| 2552 | if (!(ulpi_read(ui, 0x30) & 0x01)) |
| 2553 | ulpi_write(ui, 0x01, 0x30); |
| 2554 | } |
| 2555 | } |
| 2556 | |
| 2557 | static irqreturn_t usb_lpm_gpio_isr(int irq, void *data) |
| 2558 | { |
| 2559 | disable_irq(irq); |
| 2560 | |
| 2561 | return IRQ_HANDLED; |
| 2562 | } |
| 2563 | |
| 2564 | static void usb_lpm_exit(struct usb_info *ui) |
| 2565 | { |
| 2566 | if (ui->in_lpm == 0) |
| 2567 | return; |
| 2568 | |
| 2569 | if (usb_lpm_config_gpio) |
| 2570 | usb_lpm_config_gpio(0); |
| 2571 | |
| 2572 | wake_lock(&ui->wlock); |
| 2573 | usb_clk_enable(ui); |
| 2574 | usb_vreg_enable(ui); |
| 2575 | |
| 2576 | writel(readl(USB_USBCMD) & ~ASYNC_INTR_CTRL, USB_USBCMD); |
| 2577 | writel(readl(USB_USBCMD) & ~ULPI_STP_CTRL, USB_USBCMD); |
| 2578 | |
| 2579 | if (readl(USB_PORTSC) & PORTSC_PHCD) { |
| 2580 | disable_irq(ui->irq); |
| 2581 | schedule_work(&ui->li.wakeup_phy); |
| 2582 | } else { |
| 2583 | ui->in_lpm = 0; |
| 2584 | if (ui->xceiv) |
| 2585 | ui->xceiv->set_suspend(ui->xceiv, 0); |
| 2586 | } |
| 2587 | pr_info("%s(): USB exited from low power mode\n", __func__); |
| 2588 | } |
| 2589 | |
| 2590 | static int usb_lpm_enter(struct usb_info *ui) |
| 2591 | { |
| 2592 | unsigned long flags; |
| 2593 | unsigned connected; |
| 2594 | |
| 2595 | spin_lock_irqsave(&ui->lock, flags); |
| 2596 | if (ui->in_lpm) { |
| 2597 | spin_unlock_irqrestore(&ui->lock, flags); |
| 2598 | pr_debug("already in lpm, nothing to do\n"); |
| 2599 | return 0; |
| 2600 | } |
| 2601 | |
| 2602 | if (usb_is_online(ui)) { |
| 2603 | spin_unlock_irqrestore(&ui->lock, flags); |
| 2604 | pr_info("%s: lpm procedure aborted\n", __func__); |
| 2605 | return -1; |
| 2606 | } |
| 2607 | |
| 2608 | ui->in_lpm = 1; |
| 2609 | if (ui->xceiv) |
| 2610 | ui->xceiv->set_suspend(ui->xceiv, 1); |
| 2611 | disable_irq(ui->irq); |
| 2612 | spin_unlock_irqrestore(&ui->lock, flags); |
| 2613 | |
| 2614 | if (usb_suspend_phy(ui)) { |
| 2615 | ui->in_lpm = 0; |
| 2616 | ui->flags = USB_FLAG_RESET; |
| 2617 | enable_irq(ui->irq); |
| 2618 | pr_err("%s: phy suspend failed, lpm procedure aborted\n", |
| 2619 | __func__); |
| 2620 | return -1; |
| 2621 | } |
| 2622 | |
| 2623 | if ((B_SESSION_VALID & readl(USB_OTGSC)) && |
| 2624 | (ui->usb_state == USB_STATE_NOTATTACHED)) { |
| 2625 | ui->in_lpm = 0; |
| 2626 | writel(((readl(USB_OTGSC) & ~OTGSC_INTR_STS_MASK) | |
| 2627 | OTGSC_BSVIS), USB_OTGSC); |
| 2628 | ui->flags = USB_FLAG_VBUS_ONLINE; |
| 2629 | ui->usb_state = USB_STATE_POWERED; |
| 2630 | usb_wakeup_phy(ui); |
| 2631 | enable_irq(ui->irq); |
| 2632 | return -1; |
| 2633 | } |
| 2634 | |
| 2635 | /* enable async interrupt */ |
| 2636 | writel(readl(USB_USBCMD) | ASYNC_INTR_CTRL, USB_USBCMD); |
| 2637 | connected = readl(USB_USBCMD) & USBCMD_RS; |
| 2638 | |
| 2639 | usb_vreg_disable(ui); |
| 2640 | usb_clk_disable(ui); |
| 2641 | |
| 2642 | if (usb_lpm_config_gpio) { |
| 2643 | if (usb_lpm_config_gpio(1)) { |
| 2644 | spin_lock_irqsave(&ui->lock, flags); |
| 2645 | usb_lpm_exit(ui); |
| 2646 | spin_unlock_irqrestore(&ui->lock, flags); |
| 2647 | enable_irq(ui->irq); |
| 2648 | return -1; |
| 2649 | } |
| 2650 | enable_irq(ui->gpio_irq[0]); |
| 2651 | enable_irq(ui->gpio_irq[1]); |
| 2652 | } |
| 2653 | |
| 2654 | enable_irq(ui->irq); |
| 2655 | msm_hsusb_suspend_locks_acquire(ui, 0); |
| 2656 | pr_info("%s: usb in low power mode\n", __func__); |
| 2657 | return 0; |
| 2658 | } |
| 2659 | |
| 2660 | static void usb_enable_pullup(struct usb_info *ui) |
| 2661 | { |
| 2662 | disable_irq(ui->irq); |
| 2663 | writel(STS_URI | STS_SLI | STS_UI | STS_PCI, USB_USBINTR); |
| 2664 | writel(readl(USB_USBCMD) | USBCMD_RS, USB_USBCMD); |
| 2665 | enable_irq(ui->irq); |
| 2666 | } |
| 2667 | |
| 2668 | /* SW workarounds |
| 2669 | Issue #1 - USB Spoof Disconnect Failure |
| 2670 | Symptom - Writing 0 to run/stop bit of USBCMD doesn't cause disconnect |
| 2671 | SW workaround - Making opmode non-driving and SuspendM set in function |
| 2672 | register of SMSC phy |
| 2673 | */ |
| 2674 | static void usb_disable_pullup(struct usb_info *ui) |
| 2675 | { |
| 2676 | disable_irq(ui->irq); |
| 2677 | writel(readl(USB_USBINTR) & ~(STS_URI | STS_SLI | STS_UI | STS_PCI), |
| 2678 | USB_USBINTR); |
| 2679 | writel(readl(USB_USBCMD) & ~USBCMD_RS, USB_USBCMD); |
| 2680 | |
| 2681 | /* S/W workaround, Issue#1 */ |
| 2682 | if (!is_phy_external() && !is_phy_45nm()) |
| 2683 | ulpi_write(ui, 0x48, 0x04); |
| 2684 | |
| 2685 | enable_irq(ui->irq); |
| 2686 | } |
| 2687 | |
| 2688 | static void usb_chg_stop(struct work_struct *w) |
| 2689 | { |
| 2690 | struct usb_info *ui = the_usb_info; |
| 2691 | enum charger_type temp; |
| 2692 | unsigned long flags; |
| 2693 | |
| 2694 | spin_lock_irqsave(&ui->lock, flags); |
| 2695 | temp = ui->chg_type; |
| 2696 | spin_unlock_irqrestore(&ui->lock, flags); |
| 2697 | |
| 2698 | if (temp == USB_CHG_TYPE__SDP) |
| 2699 | msm_chg_usb_i_is_not_available(); |
| 2700 | } |
| 2701 | |
| 2702 | static void usb_vbus_online(struct usb_info *ui) |
| 2703 | { |
| 2704 | if (ui->in_lpm) { |
| 2705 | if (usb_lpm_config_gpio) |
| 2706 | usb_lpm_config_gpio(0); |
| 2707 | usb_vreg_enable(ui); |
| 2708 | usb_clk_enable(ui); |
| 2709 | usb_wakeup_phy(ui); |
| 2710 | ui->in_lpm = 0; |
| 2711 | } |
| 2712 | |
| 2713 | usb_reset(ui); |
| 2714 | } |
| 2715 | |
| 2716 | static void usb_vbus_offline(struct usb_info *ui) |
| 2717 | { |
| 2718 | unsigned long timeout; |
| 2719 | unsigned val = 0; |
| 2720 | |
| 2721 | if (ui->online != 0) { |
| 2722 | ui->online = 0; |
| 2723 | flush_all_endpoints(ui); |
| 2724 | set_configuration(ui, 0); |
| 2725 | } |
| 2726 | |
| 2727 | /* reset h/w at cable disconnetion becasuse |
| 2728 | * of h/w bugs and to flush any resource that |
| 2729 | * h/w might be holding |
| 2730 | */ |
| 2731 | clk_enable(ui->clk); |
| 2732 | |
| 2733 | if (readl(USB_PORTSC) & PORTSC_PHCD) |
| 2734 | usb_wakeup_phy(ui); |
| 2735 | |
| 2736 | if (ui->pdata->phy_reset) |
| 2737 | ui->pdata->phy_reset(ui->addr); |
| 2738 | else |
| 2739 | msm_hsusb_phy_reset(); |
| 2740 | /* Give some delay to settle phy after reset */ |
| 2741 | msleep(100); |
| 2742 | |
| 2743 | writel(USBCMD_RESET, USB_USBCMD); |
| 2744 | timeout = jiffies + USB_LINK_RESET_TIMEOUT; |
| 2745 | while (readl(USB_USBCMD) & USBCMD_RESET) { |
| 2746 | if (time_after(jiffies, timeout)) { |
| 2747 | dev_err(&ui->pdev->dev, "usb link reset timeout\n"); |
| 2748 | break; |
| 2749 | } |
| 2750 | msleep(1); |
| 2751 | } |
| 2752 | |
| 2753 | /* Disable VbusValid and SessionEnd comparators */ |
| 2754 | val = ULPI_VBUS_VALID | ULPI_SESS_END; |
| 2755 | |
| 2756 | /* enable id interrupt only when transceiver is available */ |
| 2757 | if (ui->xceiv) |
| 2758 | writel(readl(USB_OTGSC) | OTGSC_BSVIE | OTGSC_IDIE, USB_OTGSC); |
| 2759 | else { |
| 2760 | writel((readl(USB_OTGSC) | OTGSC_BSVIE) & ~OTGSC_IDPU, |
| 2761 | USB_OTGSC); |
| 2762 | ulpi_write(ui, ULPI_IDPU, ULPI_OTG_CTRL_CLR); |
| 2763 | val |= ULPI_HOST_DISCONNECT | ULPI_ID_GND; |
| 2764 | } |
| 2765 | ulpi_write(ui, val, ULPI_INT_RISE_CLR); |
| 2766 | ulpi_write(ui, val, ULPI_INT_FALL_CLR); |
| 2767 | |
| 2768 | clk_disable(ui->clk); |
| 2769 | } |
| 2770 | |
| 2771 | static void usb_lpm_wakeup_phy(struct work_struct *w) |
| 2772 | { |
| 2773 | struct usb_info *ui = the_usb_info; |
| 2774 | unsigned long flags; |
| 2775 | |
| 2776 | if (usb_wakeup_phy(ui)) { |
| 2777 | pr_err("fatal error: cannot bring phy out of lpm\n"); |
| 2778 | pr_err("%s: resetting controller\n", __func__); |
| 2779 | |
| 2780 | spin_lock_irqsave(&ui->lock, flags); |
| 2781 | usb_disable_pullup(ui); |
| 2782 | ui->flags = USB_FLAG_RESET; |
| 2783 | queue_delayed_work(usb_work, &ui->work, 0); |
| 2784 | enable_irq(ui->irq); |
| 2785 | spin_unlock_irqrestore(&ui->lock, flags); |
| 2786 | return; |
| 2787 | } |
| 2788 | |
| 2789 | ui->in_lpm = 0; |
| 2790 | if (ui->xceiv) |
| 2791 | ui->xceiv->set_suspend(ui->xceiv, 0); |
| 2792 | enable_irq(ui->irq); |
| 2793 | } |
| 2794 | |
| 2795 | void usb_function_reenumerate(void) |
| 2796 | { |
| 2797 | struct usb_info *ui = the_usb_info; |
| 2798 | |
| 2799 | /* disable and re-enable the D+ pullup */ |
| 2800 | pr_info("hsusb: disable pullup\n"); |
| 2801 | usb_disable_pullup(ui); |
| 2802 | |
| 2803 | msleep(10); |
| 2804 | |
| 2805 | pr_info("hsusb: enable pullup\n"); |
| 2806 | usb_enable_pullup(ui); |
| 2807 | } |
| 2808 | |
| 2809 | #if defined(CONFIG_DEBUG_FS) |
| 2810 | static char debug_buffer[PAGE_SIZE]; |
| 2811 | |
| 2812 | static ssize_t debug_read_status(struct file *file, char __user *ubuf, |
| 2813 | size_t count, loff_t *ppos) |
| 2814 | { |
| 2815 | struct usb_info *ui = file->private_data; |
| 2816 | char *buf = debug_buffer; |
| 2817 | unsigned long flags; |
| 2818 | struct usb_endpoint *ept; |
| 2819 | struct msm_request *req; |
| 2820 | int n; |
| 2821 | int i = 0; |
| 2822 | |
| 2823 | spin_lock_irqsave(&ui->lock, flags); |
| 2824 | |
| 2825 | i += scnprintf(buf + i, PAGE_SIZE - i, |
| 2826 | "regs: setup=%08x prime=%08x stat=%08x done=%08x\n", |
| 2827 | readl(USB_ENDPTSETUPSTAT), |
| 2828 | readl(USB_ENDPTPRIME), |
| 2829 | readl(USB_ENDPTSTAT), |
| 2830 | readl(USB_ENDPTCOMPLETE)); |
| 2831 | i += scnprintf(buf + i, PAGE_SIZE - i, |
| 2832 | "regs: cmd=%08x sts=%08x intr=%08x port=%08x\n\n", |
| 2833 | readl(USB_USBCMD), |
| 2834 | readl(USB_USBSTS), |
| 2835 | readl(USB_USBINTR), |
| 2836 | readl(USB_PORTSC)); |
| 2837 | |
| 2838 | |
| 2839 | for (n = 0; n < 32; n++) { |
| 2840 | ept = ui->ept + n; |
| 2841 | if (ept->max_pkt == 0) |
| 2842 | continue; |
| 2843 | |
| 2844 | i += scnprintf(buf + i, PAGE_SIZE - i, |
| 2845 | "ept%d %s cfg=%08x active=%08x next=%08x info=%08x\n", |
| 2846 | ept->num, (ept->flags & EPT_FLAG_IN) ? "in " : "out", |
| 2847 | ept->head->config, ept->head->active, |
| 2848 | ept->head->next, ept->head->info); |
| 2849 | |
| 2850 | for (req = ept->req; req; req = req->next) |
| 2851 | i += scnprintf(buf + i, PAGE_SIZE - i, |
| 2852 | " req @%08x next=%08x info=%08x page0=%08x %c %c\n", |
| 2853 | req->item_dma, req->item->next, |
| 2854 | req->item->info, req->item->page0, |
| 2855 | req->busy ? 'B' : ' ', |
| 2856 | req->live ? 'L' : ' ' |
| 2857 | ); |
| 2858 | } |
| 2859 | |
| 2860 | i += scnprintf(buf + i, PAGE_SIZE - i, |
| 2861 | "phy failure count: %d\n", ui->phy_fail_count); |
| 2862 | |
| 2863 | spin_unlock_irqrestore(&ui->lock, flags); |
| 2864 | |
| 2865 | return simple_read_from_buffer(ubuf, count, ppos, buf, i); |
| 2866 | } |
| 2867 | |
| 2868 | |
| 2869 | static ssize_t debug_write_reset(struct file *file, const char __user *buf, |
| 2870 | size_t count, loff_t *ppos) |
| 2871 | { |
| 2872 | struct usb_info *ui = file->private_data; |
| 2873 | unsigned long flags; |
| 2874 | |
| 2875 | spin_lock_irqsave(&ui->lock, flags); |
| 2876 | ui->flags |= USB_FLAG_RESET; |
| 2877 | queue_delayed_work(usb_work, &ui->work, 0); |
| 2878 | spin_unlock_irqrestore(&ui->lock, flags); |
| 2879 | |
| 2880 | return count; |
| 2881 | } |
| 2882 | |
| 2883 | |
| 2884 | static ssize_t debug_write_cycle(struct file *file, const char __user *buf, |
| 2885 | size_t count, loff_t *ppos) |
| 2886 | { |
| 2887 | usb_function_reenumerate(); |
| 2888 | return count; |
| 2889 | } |
| 2890 | |
| 2891 | static int debug_open(struct inode *inode, struct file *file) |
| 2892 | { |
| 2893 | file->private_data = inode->i_private; |
| 2894 | return 0; |
| 2895 | } |
| 2896 | |
| 2897 | const struct file_operations debug_stat_ops = { |
| 2898 | .open = debug_open, |
| 2899 | .read = debug_read_status, |
| 2900 | }; |
| 2901 | |
| 2902 | |
| 2903 | |
| 2904 | const struct file_operations debug_reset_ops = { |
| 2905 | .open = debug_open, |
| 2906 | .write = debug_write_reset, |
| 2907 | }; |
| 2908 | |
| 2909 | const struct file_operations debug_cycle_ops = { |
| 2910 | .open = debug_open, |
| 2911 | .write = debug_write_cycle, |
| 2912 | }; |
| 2913 | |
| 2914 | static struct dentry *debugfs_dent; |
| 2915 | static struct dentry *debugfs_status; |
| 2916 | static struct dentry *debugfs_reset; |
| 2917 | static struct dentry *debugfs_cycle; |
| 2918 | static void usb_debugfs_init(struct usb_info *ui) |
| 2919 | { |
| 2920 | debugfs_dent = debugfs_create_dir("usb", 0); |
| 2921 | if (IS_ERR(debugfs_dent)) |
| 2922 | return; |
| 2923 | |
| 2924 | debugfs_status = debugfs_create_file("status", 0444, |
| 2925 | debugfs_dent, ui, &debug_stat_ops); |
| 2926 | debugfs_reset = debugfs_create_file("reset", 0222, |
| 2927 | debugfs_dent, ui, &debug_reset_ops); |
| 2928 | debugfs_cycle = debugfs_create_file("cycle", 0222, |
| 2929 | debugfs_dent, ui, &debug_cycle_ops); |
| 2930 | } |
| 2931 | |
| 2932 | static void usb_debugfs_uninit(void) |
| 2933 | { |
| 2934 | debugfs_remove(debugfs_status); |
| 2935 | debugfs_remove(debugfs_reset); |
| 2936 | debugfs_remove(debugfs_cycle); |
| 2937 | debugfs_remove(debugfs_dent); |
| 2938 | } |
| 2939 | |
| 2940 | #else |
| 2941 | static void usb_debugfs_init(struct usb_info *ui) {} |
| 2942 | static void usb_debugfs_uninit(void) {} |
| 2943 | #endif |
| 2944 | |
| 2945 | static void usb_configure_device_descriptor(struct usb_info *ui) |
| 2946 | { |
| 2947 | desc_device.idVendor = ui->pdata->vendor_id; |
| 2948 | desc_device.idProduct = ui->composition->product_id; |
| 2949 | desc_device.bcdDevice = ui->pdata->version; |
| 2950 | |
| 2951 | if (ui->pdata->serial_number) |
| 2952 | desc_device.iSerialNumber = |
| 2953 | usb_msm_get_next_strdesc_id(ui->pdata->serial_number); |
| 2954 | if (ui->pdata->product_name) |
| 2955 | desc_device.iProduct = |
| 2956 | usb_msm_get_next_strdesc_id(ui->pdata->product_name); |
| 2957 | if (ui->pdata->manufacturer_name) |
| 2958 | desc_device.iManufacturer = |
| 2959 | usb_msm_get_next_strdesc_id( |
| 2960 | ui->pdata->manufacturer_name); |
| 2961 | |
| 2962 | /* Send Serial number to A9 for software download */ |
| 2963 | if (ui->pdata->serial_number) { |
| 2964 | msm_hsusb_is_serial_num_null(FALSE); |
| 2965 | msm_hsusb_send_serial_number(ui->pdata->serial_number); |
| 2966 | } else |
| 2967 | msm_hsusb_is_serial_num_null(TRUE); |
| 2968 | |
| 2969 | msm_hsusb_send_productID(desc_device.idProduct); |
| 2970 | |
| 2971 | } |
| 2972 | static ssize_t msm_hsusb_store_func_enable(struct device *dev, |
| 2973 | struct device_attribute *attr, |
| 2974 | const char *buf, size_t size) |
| 2975 | { |
| 2976 | char name[20]; |
| 2977 | int enable = 0; |
| 2978 | int i; |
| 2979 | |
| 2980 | for (i = 0; buf[i] != 0; i++) { |
| 2981 | if (buf[i] == '=') |
| 2982 | break; |
| 2983 | name[i] = buf[i]; |
| 2984 | } |
| 2985 | name[i++] = 0; |
| 2986 | if (buf[i] == '0' || buf[i] == '1') |
| 2987 | enable = buf[i] - '0'; |
| 2988 | else |
| 2989 | return size; |
| 2990 | |
| 2991 | pr_info("%s: name = %s, enable = %d\n", __func__, name, enable); |
| 2992 | usb_function_enable(name, enable); |
| 2993 | return size; |
| 2994 | } |
| 2995 | static ssize_t msm_hsusb_show_compswitch(struct device *dev, |
| 2996 | struct device_attribute *attr, |
| 2997 | char *buf) |
| 2998 | { |
| 2999 | struct usb_info *ui = the_usb_info; |
| 3000 | int i; |
| 3001 | |
| 3002 | if (ui->composition) |
| 3003 | i = scnprintf(buf, PAGE_SIZE, |
| 3004 | "composition product id = %x\n", |
| 3005 | ui->composition->product_id); |
| 3006 | else |
| 3007 | i = scnprintf(buf, PAGE_SIZE, |
| 3008 | "composition product id = 0\n"); |
| 3009 | return i; |
| 3010 | } |
| 3011 | |
| 3012 | static ssize_t msm_hsusb_store_compswitch(struct device *dev, |
| 3013 | struct device_attribute *attr, |
| 3014 | const char *buf, size_t size) |
| 3015 | { |
| 3016 | unsigned long pid; |
| 3017 | |
| 3018 | if (!strict_strtoul(buf, 16, &pid)) { |
| 3019 | pr_info("%s: Requested New Product id = %lx\n", __func__, pid); |
| 3020 | usb_switch_composition((unsigned short)pid); |
| 3021 | } else |
| 3022 | pr_info("%s: strict_strtoul conversion failed\n", __func__); |
| 3023 | |
| 3024 | return size; |
| 3025 | } |
| 3026 | static ssize_t msm_hsusb_store_autoresume(struct device *dev, |
| 3027 | struct device_attribute *attr, |
| 3028 | const char *buf, size_t size) |
| 3029 | { |
| 3030 | usb_remote_wakeup(); |
| 3031 | |
| 3032 | return size; |
| 3033 | } |
| 3034 | |
| 3035 | static ssize_t msm_hsusb_show_state(struct device *dev, |
| 3036 | struct device_attribute *attr, |
| 3037 | char *buf) |
| 3038 | { |
| 3039 | struct usb_info *ui = the_usb_info; |
| 3040 | int i; |
| 3041 | char *state[] = {"USB_STATE_NOTATTACHED", "USB_STATE_ATTACHED", |
| 3042 | "USB_STATE_POWERED", "USB_STATE_UNAUTHENTICATED", |
| 3043 | "USB_STATE_RECONNECTING", "USB_STATE_DEFAULT", |
| 3044 | "USB_STATE_ADDRESS", "USB_STATE_CONFIGURED", |
| 3045 | "USB_STATE_SUSPENDED" |
| 3046 | }; |
| 3047 | |
| 3048 | i = scnprintf(buf, PAGE_SIZE, "%s\n", state[ui->usb_state]); |
| 3049 | return i; |
| 3050 | } |
| 3051 | |
| 3052 | static ssize_t msm_hsusb_show_lpm(struct device *dev, |
| 3053 | struct device_attribute *attr, |
| 3054 | char *buf) |
| 3055 | { |
| 3056 | struct usb_info *ui = the_usb_info; |
| 3057 | int i; |
| 3058 | |
| 3059 | i = scnprintf(buf, PAGE_SIZE, "%d\n", ui->in_lpm); |
| 3060 | return i; |
| 3061 | } |
| 3062 | |
| 3063 | static ssize_t msm_hsusb_show_speed(struct device *dev, |
| 3064 | struct device_attribute *attr, |
| 3065 | char *buf) |
| 3066 | { |
| 3067 | struct usb_info *ui = the_usb_info; |
| 3068 | int i; |
| 3069 | char *speed[] = {"USB_SPEED_UNKNOWN", "USB_SPEED_LOW", |
| 3070 | "USB_SPEED_FULL", "USB_SPEED_HIGH"}; |
| 3071 | |
| 3072 | i = scnprintf(buf, PAGE_SIZE, "%s\n", speed[ui->speed]); |
| 3073 | return i; |
| 3074 | } |
| 3075 | |
| 3076 | static DEVICE_ATTR(composition, 0664, |
| 3077 | msm_hsusb_show_compswitch, msm_hsusb_store_compswitch); |
| 3078 | static DEVICE_ATTR(func_enable, S_IWUSR, |
| 3079 | NULL, msm_hsusb_store_func_enable); |
| 3080 | static DEVICE_ATTR(autoresume, 0222, |
| 3081 | NULL, msm_hsusb_store_autoresume); |
| 3082 | static DEVICE_ATTR(state, 0664, msm_hsusb_show_state, NULL); |
| 3083 | static DEVICE_ATTR(lpm, 0664, msm_hsusb_show_lpm, NULL); |
| 3084 | static DEVICE_ATTR(speed, 0664, msm_hsusb_show_speed, NULL); |
| 3085 | |
| 3086 | static struct attribute *msm_hsusb_attrs[] = { |
| 3087 | &dev_attr_composition.attr, |
| 3088 | &dev_attr_func_enable.attr, |
| 3089 | &dev_attr_autoresume.attr, |
| 3090 | &dev_attr_state.attr, |
| 3091 | &dev_attr_lpm.attr, |
| 3092 | &dev_attr_speed.attr, |
| 3093 | NULL, |
| 3094 | }; |
| 3095 | static struct attribute_group msm_hsusb_attr_grp = { |
| 3096 | .attrs = msm_hsusb_attrs, |
| 3097 | }; |
| 3098 | |
| 3099 | #define msm_hsusb_func_attr(function, index) \ |
| 3100 | static ssize_t show_##function(struct device *dev, \ |
| 3101 | struct device_attribute *attr, char *buf) \ |
| 3102 | { \ |
| 3103 | struct usb_info *ui = the_usb_info; \ |
| 3104 | struct usb_function_info *fi = ui->func[index]; \ |
| 3105 | \ |
| 3106 | return sprintf(buf, "%d", fi->enabled); \ |
| 3107 | \ |
| 3108 | } \ |
| 3109 | \ |
| 3110 | static DEVICE_ATTR(function, S_IRUGO, show_##function, NULL); |
| 3111 | |
| 3112 | msm_hsusb_func_attr(diag, 0); |
| 3113 | msm_hsusb_func_attr(adb, 1); |
| 3114 | msm_hsusb_func_attr(modem, 2); |
| 3115 | msm_hsusb_func_attr(nmea, 3); |
| 3116 | msm_hsusb_func_attr(mass_storage, 4); |
| 3117 | msm_hsusb_func_attr(ethernet, 5); |
| 3118 | msm_hsusb_func_attr(rmnet, 6); |
| 3119 | |
| 3120 | static struct attribute *msm_hsusb_func_attrs[] = { |
| 3121 | &dev_attr_diag.attr, |
| 3122 | &dev_attr_adb.attr, |
| 3123 | &dev_attr_modem.attr, |
| 3124 | &dev_attr_nmea.attr, |
| 3125 | &dev_attr_mass_storage.attr, |
| 3126 | &dev_attr_ethernet.attr, |
| 3127 | &dev_attr_rmnet.attr, |
| 3128 | NULL, |
| 3129 | }; |
| 3130 | |
| 3131 | static struct attribute_group msm_hsusb_func_attr_grp = { |
| 3132 | .name = "functions", |
| 3133 | .attrs = msm_hsusb_func_attrs, |
| 3134 | }; |
| 3135 | |
| 3136 | static int __init usb_probe(struct platform_device *pdev) |
| 3137 | { |
| 3138 | struct resource *res; |
| 3139 | struct usb_info *ui; |
| 3140 | int irq; |
| 3141 | int ulpi_irq1 = 0; |
| 3142 | int ulpi_irq2 = 0; |
| 3143 | int i; |
| 3144 | int ret = 0; |
| 3145 | |
| 3146 | if (!pdev || !pdev->dev.platform_data) { |
| 3147 | pr_err("%s:pdev or platform data is null\n", __func__); |
| 3148 | return -ENODEV; |
| 3149 | } |
| 3150 | |
| 3151 | irq = platform_get_irq(pdev, 0); |
| 3152 | if (irq < 0) { |
| 3153 | pr_err("%s: failed to get irq num from platform_get_irq\n", |
| 3154 | __func__); |
| 3155 | return -ENODEV; |
| 3156 | } |
| 3157 | |
| 3158 | |
| 3159 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 3160 | if (!res) { |
| 3161 | pr_err("%s: failed to get mem resource\n", __func__); |
| 3162 | return -ENODEV; |
| 3163 | } |
| 3164 | |
| 3165 | ret = sysfs_create_group(&pdev->dev.kobj, &msm_hsusb_attr_grp); |
| 3166 | if (ret) { |
| 3167 | pr_err("%s: unable to create sysfs group\n", __func__); |
| 3168 | return ret; |
| 3169 | } |
| 3170 | |
| 3171 | usb_work = create_singlethread_workqueue("usb_work"); |
| 3172 | if (!usb_work) { |
| 3173 | pr_err("%s: unable to create work queue\n", __func__); |
| 3174 | ret = -ENOMEM; |
| 3175 | goto free_sysfs_grp; |
| 3176 | } |
| 3177 | |
| 3178 | ui = kzalloc(sizeof(struct usb_info), GFP_KERNEL); |
| 3179 | if (!ui) { |
| 3180 | pr_err("%s: unable to allocate memory for ui\n", __func__); |
| 3181 | ret = -ENOMEM; |
| 3182 | goto free_workqueue; |
| 3183 | } |
| 3184 | |
| 3185 | ui->pdev = pdev; |
| 3186 | ui->pdata = pdev->dev.platform_data; |
| 3187 | |
| 3188 | for (i = 0; i < ui->pdata->num_compositions; i++) |
| 3189 | if (ui->pdata->compositions[i].product_id == pid) { |
| 3190 | ui->composition = &ui->pdata->compositions[i]; |
| 3191 | break; |
| 3192 | } |
| 3193 | if (!ui->composition) { |
| 3194 | pr_err("%s: unable to find the composition with pid:(%d)\n", |
| 3195 | __func__, pid); |
| 3196 | ret = -ENODEV; |
| 3197 | goto free_ui; |
| 3198 | } |
| 3199 | |
| 3200 | ui->phy_info = ui->pdata->phy_info; |
| 3201 | if (ui->phy_info == USB_PHY_UNDEFINED) { |
| 3202 | pr_err("undefined phy_info: (%d)\n", ui->phy_info); |
| 3203 | ret = -ENOMEM; |
| 3204 | goto free_ui; |
| 3205 | } |
| 3206 | |
| 3207 | /* zero is reserved for language id */ |
| 3208 | ui->strdesc_index = 1; |
| 3209 | ui->strdesc = kzalloc(sizeof(char *) * MAX_STRDESC_NUM, GFP_KERNEL); |
| 3210 | if (!ui->strdesc) { |
| 3211 | pr_err("%s: unable allocate mem for string descriptors\n", |
| 3212 | __func__); |
| 3213 | ret = -ENOMEM; |
| 3214 | goto free_ui; |
| 3215 | } |
| 3216 | |
| 3217 | ui->num_funcs = ui->pdata->num_functions; |
| 3218 | ui->func = kzalloc(sizeof(struct usb_function *) * ui->num_funcs, |
| 3219 | GFP_KERNEL); |
| 3220 | if (!ui->func) { |
| 3221 | pr_err("%s: unable allocate mem for functions\n", __func__); |
| 3222 | ret = -ENOMEM; |
| 3223 | goto free_str_desc; |
| 3224 | } |
| 3225 | |
| 3226 | ret = sysfs_create_group(&pdev->dev.kobj, &msm_hsusb_func_attr_grp); |
| 3227 | if (ret) { |
| 3228 | pr_err("%s: unable to create functions sysfs group\n", |
| 3229 | __func__); |
| 3230 | goto free_func; |
| 3231 | } |
| 3232 | |
| 3233 | ui->addr = ioremap(res->start, resource_size(res)); |
| 3234 | if (!ui->addr) { |
| 3235 | pr_err("%s: unable ioremap\n", __func__); |
| 3236 | ret = -ENOMEM; |
| 3237 | goto free_func_sysfs_grp; |
| 3238 | } |
| 3239 | |
| 3240 | ui->buf = dma_alloc_coherent(&pdev->dev, 4096, &ui->dma, GFP_KERNEL); |
| 3241 | if (!ui->buf) { |
| 3242 | pr_err("%s: failed allocate dma coherent memory\n", __func__); |
| 3243 | ret = -ENOMEM; |
| 3244 | goto free_iounmap; |
| 3245 | } |
| 3246 | |
| 3247 | ui->pool = dma_pool_create("hsusb", NULL, 32, 32, 0); |
| 3248 | if (!ui->pool) { |
| 3249 | pr_err("%s: unable to allocate dma pool\n", __func__); |
| 3250 | ret = -ENOMEM; |
| 3251 | goto free_dma_coherent; |
| 3252 | } |
| 3253 | |
| 3254 | ui->clk = clk_get(&pdev->dev, "usb_hs_clk"); |
| 3255 | if (IS_ERR(ui->clk)) { |
| 3256 | pr_err("%s: unable get usb_hs_clk\n", __func__); |
| 3257 | ret = PTR_ERR(ui->clk); |
| 3258 | goto free_dma_pool; |
| 3259 | } |
| 3260 | |
| 3261 | ui->pclk = clk_get(&pdev->dev, "usb_hs_pclk"); |
| 3262 | if (IS_ERR(ui->pclk)) { |
| 3263 | pr_err("%s: unable get usb_hs_pclk\n", __func__); |
| 3264 | ret = PTR_ERR(ui->pclk); |
| 3265 | goto free_hs_clk; |
| 3266 | } |
| 3267 | |
| 3268 | if (ui->pdata->core_clk) { |
| 3269 | ui->cclk = clk_get(&pdev->dev, "usb_hs_core_clk"); |
| 3270 | if (IS_ERR(ui->cclk)) { |
| 3271 | pr_err("%s: unable get usb_hs_core_clk\n", __func__); |
| 3272 | ret = PTR_ERR(ui->cclk); |
| 3273 | goto free_hs_pclk; |
| 3274 | } |
| 3275 | } |
| 3276 | |
| 3277 | if (ui->pdata->vreg5v_required) { |
| 3278 | ui->vreg = vreg_get(NULL, "boost"); |
| 3279 | if (IS_ERR(ui->vreg)) { |
| 3280 | pr_err("%s: vreg get failed\n", __func__); |
| 3281 | ui->vreg = NULL; |
| 3282 | ret = PTR_ERR(ui->vreg); |
| 3283 | goto free_hs_cclk; |
| 3284 | } |
| 3285 | } |
| 3286 | |
| 3287 | /* disable interrupts before requesting irq */ |
| 3288 | usb_clk_enable(ui); |
| 3289 | writel(0, USB_USBINTR); |
| 3290 | writel(readl(USB_OTGSC) & ~OTGSC_INTR_MASK, USB_OTGSC); |
| 3291 | usb_clk_disable(ui); |
| 3292 | |
| 3293 | ret = request_irq(irq, usb_interrupt, IRQF_SHARED, pdev->name, ui); |
| 3294 | if (ret) { |
| 3295 | pr_err("%s: request_irq failed\n", __func__); |
| 3296 | goto free_vreg5v; |
| 3297 | } |
| 3298 | ui->irq = irq; |
| 3299 | |
| 3300 | if (ui->pdata->config_gpio) { |
| 3301 | usb_lpm_config_gpio = ui->pdata->config_gpio; |
| 3302 | |
| 3303 | ulpi_irq1 = platform_get_irq_byname(pdev, "vbus_interrupt"); |
| 3304 | if (ulpi_irq1 < 0) { |
| 3305 | pr_err("%s: failed to get vbus gpio interrupt\n", |
| 3306 | __func__); |
| 3307 | return -ENODEV; |
| 3308 | } |
| 3309 | |
| 3310 | ulpi_irq2 = platform_get_irq_byname(pdev, "id_interrupt"); |
| 3311 | if (ulpi_irq2 < 0) { |
| 3312 | pr_err("%s: failed to get id gpio interrupt\n", |
| 3313 | __func__); |
| 3314 | return -ENODEV; |
| 3315 | } |
| 3316 | |
| 3317 | ret = request_irq(ulpi_irq1, |
| 3318 | &usb_lpm_gpio_isr, |
| 3319 | IRQF_TRIGGER_HIGH, |
| 3320 | "vbus_interrupt", NULL); |
| 3321 | if (ret) { |
| 3322 | pr_err("%s: failed to request vbus interrupt:(%d)\n", |
| 3323 | __func__, ulpi_irq1); |
| 3324 | goto free_irq; |
| 3325 | } |
| 3326 | |
| 3327 | ret = request_irq(ulpi_irq2, |
| 3328 | &usb_lpm_gpio_isr, |
| 3329 | IRQF_TRIGGER_RISING, |
| 3330 | "usb_ulpi_data3", NULL); |
| 3331 | if (ret) { |
| 3332 | pr_err("%s: failed to request irq ulpi_data_3:(%d)\n", |
| 3333 | __func__, ulpi_irq2); |
| 3334 | goto free_ulpi_irq1; |
| 3335 | } |
| 3336 | |
| 3337 | ui->gpio_irq[0] = ulpi_irq1; |
| 3338 | ui->gpio_irq[1] = ulpi_irq2; |
| 3339 | } |
| 3340 | |
| 3341 | ui->sdev.name = DRIVER_NAME; |
| 3342 | ui->sdev.print_name = print_switch_name; |
| 3343 | ui->sdev.print_state = print_switch_state; |
| 3344 | |
| 3345 | ret = switch_dev_register(&ui->sdev); |
| 3346 | if (ret < 0) { |
| 3347 | pr_err("%s(): switch_dev_register failed ret = %d\n", |
| 3348 | __func__, ret); |
| 3349 | goto free_ulpi_irq2; |
| 3350 | } |
| 3351 | |
| 3352 | the_usb_info = ui; |
| 3353 | ui->functions_map = ui->pdata->function_map; |
| 3354 | ui->selfpowered = 0; |
| 3355 | ui->remote_wakeup = 0; |
| 3356 | ui->maxpower = 0xFA; |
| 3357 | ui->chg_type = USB_CHG_TYPE__INVALID; |
| 3358 | /* to allow swfi latency, driver latency |
| 3359 | * must be above listed swfi latency |
| 3360 | */ |
| 3361 | ui->pdata->swfi_latency += 1; |
| 3362 | |
| 3363 | spin_lock_init(&ui->lock); |
| 3364 | msm_hsusb_suspend_locks_init(ui, 1); |
| 3365 | enable_irq_wake(irq); |
| 3366 | |
| 3367 | /* memory barrier initialization in non-interrupt context */ |
| 3368 | dmb(); |
| 3369 | |
| 3370 | usb_debugfs_init(ui); |
| 3371 | usb_prepare(ui); |
| 3372 | |
| 3373 | pr_info("%s: io=%p, irq=%d, dma=%p(%x)\n", |
| 3374 | __func__, ui->addr, ui->irq, ui->buf, ui->dma); |
| 3375 | return 0; |
| 3376 | |
| 3377 | free_ulpi_irq2: |
| 3378 | free_irq(ulpi_irq2, NULL); |
| 3379 | free_ulpi_irq1: |
| 3380 | free_irq(ulpi_irq1, NULL); |
| 3381 | free_irq: |
| 3382 | free_irq(ui->irq, ui); |
| 3383 | free_vreg5v: |
| 3384 | if (ui->pdata->vreg5v_required) |
| 3385 | vreg_put(ui->vreg); |
| 3386 | free_hs_cclk: |
| 3387 | clk_put(ui->cclk); |
| 3388 | free_hs_pclk: |
| 3389 | clk_put(ui->pclk); |
| 3390 | free_hs_clk: |
| 3391 | clk_put(ui->clk); |
| 3392 | free_dma_pool: |
| 3393 | dma_pool_destroy(ui->pool); |
| 3394 | free_dma_coherent: |
| 3395 | dma_free_coherent(&pdev->dev, 4096, ui->buf, ui->dma); |
| 3396 | free_iounmap: |
| 3397 | iounmap(ui->addr); |
| 3398 | free_func_sysfs_grp: |
| 3399 | sysfs_remove_group(&pdev->dev.kobj, &msm_hsusb_func_attr_grp); |
| 3400 | free_func: |
| 3401 | kfree(ui->func); |
| 3402 | free_str_desc: |
| 3403 | kfree(ui->strdesc); |
| 3404 | free_ui: |
| 3405 | kfree(ui); |
| 3406 | free_workqueue: |
| 3407 | destroy_workqueue(usb_work); |
| 3408 | free_sysfs_grp: |
| 3409 | sysfs_remove_group(&pdev->dev.kobj, &msm_hsusb_attr_grp); |
| 3410 | |
| 3411 | return ret; |
| 3412 | } |
| 3413 | |
| 3414 | #ifdef CONFIG_PM |
| 3415 | static int usb_platform_suspend(struct platform_device *pdev, |
| 3416 | pm_message_t state) |
| 3417 | { |
| 3418 | struct usb_info *ui = the_usb_info; |
| 3419 | unsigned long flags; |
| 3420 | int ret = 0; |
| 3421 | |
| 3422 | spin_lock_irqsave(&ui->lock, flags); |
| 3423 | |
| 3424 | if (!ui->active) { |
| 3425 | spin_unlock_irqrestore(&ui->lock, flags); |
| 3426 | pr_info("%s: peripheral mode is not active" |
| 3427 | "nothing to be done\n", __func__); |
| 3428 | return 0; |
| 3429 | } |
| 3430 | |
| 3431 | if (ui->in_lpm) { |
| 3432 | spin_unlock_irqrestore(&ui->lock, flags); |
| 3433 | pr_info("%s: we are already in lpm, nothing to be done\n", |
| 3434 | __func__); |
| 3435 | return 0; |
| 3436 | } |
| 3437 | spin_unlock_irqrestore(&ui->lock, flags); |
| 3438 | |
| 3439 | ret = usb_lpm_enter(ui); |
| 3440 | if (ret) |
| 3441 | pr_err("%s: failed to enter lpm\n", __func__); |
| 3442 | |
| 3443 | return ret; |
| 3444 | } |
| 3445 | #endif |
| 3446 | |
| 3447 | static struct platform_driver usb_driver = { |
| 3448 | .probe = usb_probe, |
| 3449 | #ifdef CONFIG_PM |
| 3450 | .suspend = usb_platform_suspend, |
| 3451 | #endif |
| 3452 | .driver = { .name = DRIVER_NAME, }, |
| 3453 | }; |
| 3454 | |
| 3455 | static int __init usb_module_init(void) |
| 3456 | { |
| 3457 | /* rpc connect for phy_reset */ |
| 3458 | msm_hsusb_rpc_connect(); |
| 3459 | /* rpc connect for charging */ |
| 3460 | msm_chg_rpc_connect(); |
| 3461 | |
| 3462 | return platform_driver_register(&usb_driver); |
| 3463 | } |
| 3464 | |
| 3465 | static void free_usb_info(void) |
| 3466 | { |
| 3467 | struct usb_info *ui = the_usb_info; |
| 3468 | unsigned long flags; |
| 3469 | int i; |
| 3470 | if (ui) { |
| 3471 | INIT_LIST_HEAD(&usb_function_list); |
| 3472 | |
| 3473 | for (i = 0; i < ui->num_funcs; i++) |
| 3474 | kfree(ui->func[i]); |
| 3475 | ui->num_funcs = 0; |
| 3476 | usb_uninit(ui); |
| 3477 | kfree(ui->strdesc); |
| 3478 | usb_ept_free_req(&ui->ep0in, ui->setup_req); |
| 3479 | if (ui->ept[0].ui == ui) |
| 3480 | flush_all_endpoints(ui); |
| 3481 | spin_lock_irqsave(&ui->lock, flags); |
| 3482 | usb_clk_disable(ui); |
| 3483 | usb_vreg_disable(ui); |
| 3484 | spin_unlock_irqrestore(&ui->lock, flags); |
| 3485 | usb_free(ui, 0); |
| 3486 | the_usb_info = NULL; |
| 3487 | } |
| 3488 | } |
| 3489 | static void usb_exit(void) |
| 3490 | { |
| 3491 | struct usb_info *ui = the_usb_info; |
| 3492 | /* free the dev state structure */ |
| 3493 | if (!ui) |
| 3494 | return; |
| 3495 | |
| 3496 | if (ui->xceiv) { |
| 3497 | ui->xceiv->set_peripheral(ui->xceiv, NULL); |
| 3498 | msm_otg_put_transceiver(ui->xceiv); |
| 3499 | } |
| 3500 | |
| 3501 | cancel_work_sync(&ui->li.wakeup_phy); |
| 3502 | |
| 3503 | destroy_workqueue(usb_work); |
| 3504 | /* free the usb_info structure */ |
| 3505 | free_usb_info(); |
| 3506 | switch_dev_unregister(&ui->sdev); |
| 3507 | sysfs_remove_group(&ui->pdev->dev.kobj, &msm_hsusb_func_attr_grp); |
| 3508 | sysfs_remove_group(&ui->pdev->dev.kobj, &msm_hsusb_attr_grp); |
| 3509 | usb_debugfs_uninit(); |
| 3510 | platform_driver_unregister(&usb_driver); |
| 3511 | msm_hsusb_rpc_close(); |
| 3512 | msm_chg_rpc_close(); |
| 3513 | msm_pm_app_unregister_vbus_sn(&msm_hsusb_set_vbus_state); |
| 3514 | msm_pm_app_rpc_deinit(); |
| 3515 | } |
| 3516 | |
| 3517 | static void __exit usb_module_exit(void) |
| 3518 | { |
| 3519 | usb_exit(); |
| 3520 | } |
| 3521 | |
| 3522 | module_param(pid, int, 0); |
| 3523 | MODULE_PARM_DESC(pid, "Product ID of the desired composition"); |
| 3524 | |
| 3525 | module_init(usb_module_init); |
| 3526 | module_exit(usb_module_exit); |
| 3527 | |
| 3528 | static void copy_string_descriptor(char *string, char *buffer) |
| 3529 | { |
| 3530 | int length, i; |
| 3531 | |
| 3532 | if (string) { |
| 3533 | length = strlen(string); |
| 3534 | buffer[0] = 2 * length + 2; |
| 3535 | buffer[1] = USB_DT_STRING; |
| 3536 | for (i = 0; i < length; i++) { |
| 3537 | buffer[2 * i + 2] = string[i]; |
| 3538 | buffer[2 * i + 3] = 0; |
| 3539 | } |
| 3540 | } |
| 3541 | } |
| 3542 | static int get_qualifier_descriptor(struct usb_qualifier_descriptor *dq) |
| 3543 | { |
| 3544 | struct usb_qualifier_descriptor *dev_qualifier = dq; |
| 3545 | dev_qualifier->bLength = sizeof(struct usb_qualifier_descriptor), |
| 3546 | dev_qualifier->bDescriptorType = USB_DT_DEVICE_QUALIFIER, |
| 3547 | dev_qualifier->bcdUSB = __constant_cpu_to_le16(0x0200), |
| 3548 | dev_qualifier->bDeviceClass = USB_CLASS_PER_INTERFACE, |
| 3549 | dev_qualifier->bDeviceSubClass = 0; |
| 3550 | dev_qualifier->bDeviceProtocol = 0; |
| 3551 | dev_qualifier->bMaxPacketSize0 = 64; |
| 3552 | dev_qualifier->bNumConfigurations = 1; |
| 3553 | dev_qualifier->bRESERVED = 0; |
| 3554 | return sizeof(struct usb_qualifier_descriptor); |
| 3555 | } |
| 3556 | |
| 3557 | static int usb_fill_descriptors(void *ptr, |
| 3558 | struct usb_descriptor_header **descriptors) |
| 3559 | { |
| 3560 | unsigned char *buf = ptr; |
| 3561 | struct usb_descriptor_header *item = descriptors[0]; |
| 3562 | unsigned cnt = 0; |
| 3563 | |
| 3564 | while (NULL != item) { |
| 3565 | unsigned len = item->bLength; |
| 3566 | memcpy(buf, item, len); |
| 3567 | buf += len; |
| 3568 | cnt++; |
| 3569 | item = descriptors[cnt]; |
| 3570 | } |
| 3571 | |
| 3572 | return buf-(u8 *)ptr; |
| 3573 | } |
| 3574 | |
| 3575 | static int usb_find_descriptor(struct usb_info *ui, struct usb_ctrlrequest *ctl, |
| 3576 | struct usb_request *req) |
| 3577 | { |
| 3578 | int i; |
| 3579 | unsigned short id = ctl->wValue; |
| 3580 | unsigned short type = id >> 8; |
| 3581 | id &= 0xff; |
| 3582 | |
| 3583 | if ((type == USB_DT_DEVICE) && (id == 0)) { |
| 3584 | req->length = sizeof(desc_device); |
| 3585 | if (usb_msm_is_iad()) { |
| 3586 | desc_device.bDeviceClass = 0xEF; |
| 3587 | desc_device.bDeviceSubClass = 0x02; |
| 3588 | desc_device.bDeviceProtocol = 0x01; |
| 3589 | } |
| 3590 | memcpy(req->buf, &desc_device, req->length); |
| 3591 | return 0; |
| 3592 | } |
| 3593 | if ((type == USB_DT_DEVICE_QUALIFIER) && (id == 0)) { |
| 3594 | struct usb_qualifier_descriptor dq; |
| 3595 | req->length = get_qualifier_descriptor(&dq); |
| 3596 | if (usb_msm_is_iad()) { |
| 3597 | dq.bDeviceClass = 0xEF; |
| 3598 | dq.bDeviceSubClass = 0x02; |
| 3599 | dq.bDeviceProtocol = 0x01; |
| 3600 | } |
| 3601 | memcpy(req->buf, &dq, req->length); |
| 3602 | return 0; |
| 3603 | } |
| 3604 | |
| 3605 | if ((type == USB_DT_OTHER_SPEED_CONFIG) && (id == 0)) |
| 3606 | goto get_config; |
| 3607 | |
| 3608 | if ((type == USB_DT_CONFIG) && (id == 0)) { |
| 3609 | struct usb_config_descriptor cfg; |
| 3610 | unsigned ifc_count = 0; |
| 3611 | char *ptr, *start; |
| 3612 | get_config: |
| 3613 | ifc_count = 0; |
| 3614 | start = req->buf; |
| 3615 | ptr = start + USB_DT_CONFIG_SIZE; |
| 3616 | ifc_count = ui->next_ifc_num; |
| 3617 | |
| 3618 | for (i = 0; i < ui->num_funcs; i++) { |
| 3619 | struct usb_function_info *fi = ui->func[i]; |
| 3620 | struct usb_descriptor_header **dh = NULL; |
| 3621 | |
| 3622 | if (!fi || !(ui->composition->functions & (1 << i))) |
| 3623 | continue; |
| 3624 | switch (ui->speed) { |
| 3625 | case USB_SPEED_HIGH: |
| 3626 | if (type == USB_DT_OTHER_SPEED_CONFIG) |
| 3627 | dh = fi->func->fs_descriptors; |
| 3628 | else |
| 3629 | dh = fi->func->hs_descriptors; |
| 3630 | break; |
| 3631 | |
| 3632 | case USB_SPEED_FULL: |
| 3633 | if (type == USB_DT_OTHER_SPEED_CONFIG) |
| 3634 | dh = fi->func->hs_descriptors; |
| 3635 | else |
| 3636 | dh = fi->func->fs_descriptors; |
| 3637 | break; |
| 3638 | |
| 3639 | default: |
| 3640 | printk(KERN_ERR "Unsupported speed(%x)\n", |
| 3641 | ui->speed); |
| 3642 | return -1; |
| 3643 | } |
| 3644 | ptr += usb_fill_descriptors(ptr, dh); |
| 3645 | } |
| 3646 | |
| 3647 | #define USB_REMOTE_WAKEUP_SUPPORT 1 |
| 3648 | cfg.bLength = USB_DT_CONFIG_SIZE; |
| 3649 | if (type == USB_DT_OTHER_SPEED_CONFIG) |
| 3650 | cfg.bDescriptorType = USB_DT_OTHER_SPEED_CONFIG; |
| 3651 | else |
| 3652 | cfg.bDescriptorType = USB_DT_CONFIG; |
| 3653 | cfg.wTotalLength = ptr - start; |
| 3654 | cfg.bNumInterfaces = ifc_count; |
| 3655 | cfg.bConfigurationValue = 1; |
| 3656 | cfg.iConfiguration = 0; |
| 3657 | cfg.bmAttributes = USB_CONFIG_ATT_ONE | |
| 3658 | ui->selfpowered << USB_CONFIG_ATT_SELFPOWER_POS | |
| 3659 | USB_REMOTE_WAKEUP_SUPPORT << USB_CONFIG_ATT_WAKEUP_POS; |
| 3660 | cfg.bMaxPower = ui->maxpower; |
| 3661 | |
| 3662 | memcpy(start, &cfg, USB_DT_CONFIG_SIZE); |
| 3663 | |
| 3664 | req->length = ptr - start; |
| 3665 | return 0; |
| 3666 | } |
| 3667 | |
| 3668 | if (type == USB_DT_STRING) { |
| 3669 | char *buffer = req->buf; |
| 3670 | |
| 3671 | buffer[0] = 0; |
| 3672 | if (id > ui->strdesc_index) |
| 3673 | return -1; |
| 3674 | if (id == STRING_LANGUAGE_ID) |
| 3675 | memcpy(buffer, str_lang_desc, str_lang_desc[0]); |
| 3676 | else |
| 3677 | copy_string_descriptor(ui->strdesc[id], buffer); |
| 3678 | |
| 3679 | if (buffer[0]) { |
| 3680 | req->length = buffer[0]; |
| 3681 | return 0; |
| 3682 | } else |
| 3683 | return -1; |
| 3684 | } |
| 3685 | return -1; |
| 3686 | } |
| 3687 | |
| 3688 | /*****Gadget Framework Functions***/ |
| 3689 | struct device *usb_get_device(void) |
| 3690 | { |
| 3691 | if (the_usb_info) { |
| 3692 | if (the_usb_info->pdev) |
| 3693 | return &(the_usb_info->pdev->dev); |
| 3694 | } |
| 3695 | return NULL; |
| 3696 | } |
| 3697 | EXPORT_SYMBOL(usb_get_device); |
| 3698 | |
| 3699 | int usb_ept_cancel_xfer(struct usb_endpoint *ept, struct usb_request *_req) |
| 3700 | { |
| 3701 | struct usb_info *ui = the_usb_info; |
| 3702 | struct msm_request *req = to_msm_request(_req); |
| 3703 | struct msm_request *temp_req, *prev_req; |
| 3704 | unsigned long flags; |
| 3705 | |
| 3706 | if (!(ui && req && ept->req)) |
| 3707 | return -EINVAL; |
| 3708 | |
| 3709 | spin_lock_irqsave(&ui->lock, flags); |
| 3710 | if (req->busy) { |
| 3711 | req->req.status = 0; |
| 3712 | req->busy = 0; |
| 3713 | |
| 3714 | /* See if the request is the first request in the ept queue */ |
| 3715 | if (ept->req == req) { |
| 3716 | /* Stop the transfer */ |
| 3717 | do { |
| 3718 | writel((1 << ept->bit), USB_ENDPTFLUSH); |
| 3719 | while (readl(USB_ENDPTFLUSH) & (1 << ept->bit)) |
| 3720 | udelay(100); |
| 3721 | } while (readl(USB_ENDPTSTAT) & (1 << ept->bit)); |
| 3722 | if (!req->next) |
| 3723 | ept->last = NULL; |
| 3724 | ept->req = req->next; |
| 3725 | ept->head->next = req->item->next; |
| 3726 | goto cancel_req; |
| 3727 | } |
| 3728 | /* Request could be in the middle of ept queue */ |
| 3729 | prev_req = temp_req = ept->req; |
| 3730 | do { |
| 3731 | if (req == temp_req) { |
| 3732 | if (req->live) { |
| 3733 | /* Stop the transfer */ |
| 3734 | do { |
| 3735 | writel((1 << ept->bit), |
| 3736 | USB_ENDPTFLUSH); |
| 3737 | while (readl(USB_ENDPTFLUSH) & |
| 3738 | (1 << ept->bit)) |
| 3739 | udelay(100); |
| 3740 | } while (readl(USB_ENDPTSTAT) & |
| 3741 | (1 << ept->bit)); |
| 3742 | } |
| 3743 | prev_req->next = temp_req->next; |
| 3744 | prev_req->item->next = temp_req->item->next; |
| 3745 | if (!req->next) |
| 3746 | ept->last = prev_req; |
| 3747 | goto cancel_req; |
| 3748 | } |
| 3749 | prev_req = temp_req; |
| 3750 | temp_req = temp_req->next; |
| 3751 | } while (temp_req != NULL); |
| 3752 | goto error; |
| 3753 | cancel_req: |
| 3754 | if (req->live) { |
| 3755 | /* prepare the transaction descriptor item for the hardware */ |
| 3756 | req->item->next = TERMINATE; |
| 3757 | req->item->info = 0; |
| 3758 | req->live = 0; |
| 3759 | dma_unmap_single(NULL, req->dma, req->req.length, |
| 3760 | (ept->flags & EPT_FLAG_IN) ? |
| 3761 | DMA_TO_DEVICE : DMA_FROM_DEVICE); |
| 3762 | /* Reprime the endpoint for the remaining transfers */ |
| 3763 | if (ept->req) { |
| 3764 | temp_req = ept->req; |
| 3765 | while (temp_req != NULL) { |
| 3766 | temp_req->live = 0; |
| 3767 | temp_req = temp_req->next; |
| 3768 | } |
| 3769 | usb_ept_start(ept); |
| 3770 | } |
| 3771 | } else |
| 3772 | dma_unmap_single(NULL, req->dma, req->req.length, |
| 3773 | (ept->flags & EPT_FLAG_IN) ? |
| 3774 | DMA_TO_DEVICE : DMA_FROM_DEVICE); |
| 3775 | spin_unlock_irqrestore(&ui->lock, flags); |
| 3776 | return 0; |
| 3777 | } |
| 3778 | error: |
| 3779 | spin_unlock_irqrestore(&ui->lock, flags); |
| 3780 | return -EINVAL; |
| 3781 | } |
| 3782 | EXPORT_SYMBOL(usb_ept_cancel_xfer); |
| 3783 | |
| 3784 | int usb_ept_set_halt(struct usb_endpoint *ept) |
| 3785 | { |
| 3786 | struct usb_info *ui = ept->ui; |
| 3787 | int in = ept->flags & EPT_FLAG_IN; |
| 3788 | unsigned n; |
| 3789 | |
| 3790 | if (ui->in_lpm) { |
| 3791 | pr_err("%s: controller is in lpm, cannot proceed\n", __func__); |
| 3792 | return -1; |
| 3793 | } |
| 3794 | |
| 3795 | ept->ept_halted = 1; |
| 3796 | |
| 3797 | n = readl(USB_ENDPTCTRL(ept->num)); |
| 3798 | |
| 3799 | if (in) |
| 3800 | n |= CTRL_TXS; |
| 3801 | else |
| 3802 | n |= CTRL_RXS; |
| 3803 | |
| 3804 | writel(n, USB_ENDPTCTRL(ept->num)); |
| 3805 | |
| 3806 | return 0; |
| 3807 | } |
| 3808 | EXPORT_SYMBOL(usb_ept_set_halt); |
| 3809 | |
| 3810 | int usb_ept_clear_halt(struct usb_endpoint *ept) |
| 3811 | { |
| 3812 | struct usb_info *ui = ept->ui; |
| 3813 | int in = ept->flags & EPT_FLAG_IN; |
| 3814 | unsigned n; |
| 3815 | |
| 3816 | if (ui->in_lpm) { |
| 3817 | pr_err("%s: controller is in lpm, cannot proceed\n", __func__); |
| 3818 | return -1; |
| 3819 | } |
| 3820 | |
| 3821 | if (ept->ept_halted) |
| 3822 | ept->ept_halted = 0; |
| 3823 | |
| 3824 | n = readl(USB_ENDPTCTRL(ept->num)); |
| 3825 | |
| 3826 | /*clear stall bit and set data toggle bit*/ |
| 3827 | if (in) { |
| 3828 | n &= (~CTRL_TXS); |
| 3829 | n |= (CTRL_TXR); |
| 3830 | } else { |
| 3831 | n &= ~(CTRL_RXS); |
| 3832 | n |= (CTRL_RXR); |
| 3833 | } |
| 3834 | |
| 3835 | writel(n, USB_ENDPTCTRL(ept->num)); |
| 3836 | |
| 3837 | return 0; |
| 3838 | } |
| 3839 | EXPORT_SYMBOL(usb_ept_clear_halt); |
| 3840 | |
| 3841 | int usb_ept_is_stalled(struct usb_endpoint *ept) |
| 3842 | { |
| 3843 | struct usb_info *ui = ept->ui; |
| 3844 | int in = ept->flags & EPT_FLAG_IN; |
| 3845 | unsigned n; |
| 3846 | |
| 3847 | n = readl(USB_ENDPTCTRL(ept->num)); |
| 3848 | |
| 3849 | if (in && (n & CTRL_TXS)) |
| 3850 | return 1; |
| 3851 | else if (n & CTRL_RXS) |
| 3852 | return 1; |
| 3853 | return 0; |
| 3854 | } |
| 3855 | |
| 3856 | void usb_ept_fifo_flush(struct usb_endpoint *ept) |
| 3857 | { |
| 3858 | flush_endpoint(ept); |
| 3859 | } |
| 3860 | EXPORT_SYMBOL(usb_ept_fifo_flush); |
| 3861 | |
| 3862 | struct usb_function *usb_ept_get_function(struct usb_endpoint *ept) |
| 3863 | { |
| 3864 | return NULL; |
| 3865 | } |
| 3866 | EXPORT_SYMBOL(usb_ept_get_function); |
| 3867 | |
| 3868 | |
| 3869 | void usb_free_endpoint_all_req(struct usb_endpoint *ep) |
| 3870 | { |
| 3871 | struct msm_request *temp; |
| 3872 | struct msm_request *req; |
| 3873 | if (!ep) |
| 3874 | return; |
| 3875 | req = ep->req; |
| 3876 | while (req) { |
| 3877 | temp = req->next; |
| 3878 | req->busy = 0; |
| 3879 | if (&req->req) |
| 3880 | usb_ept_free_req(ep, &req->req); |
| 3881 | req = temp; |
| 3882 | } |
| 3883 | } |
| 3884 | EXPORT_SYMBOL(usb_free_endpoint_all_req); |
| 3885 | |
| 3886 | int usb_function_unregister(struct usb_function *func) |
| 3887 | { |
| 3888 | struct usb_info *ui = the_usb_info; |
| 3889 | int i; |
| 3890 | struct usb_function_info *fi; |
| 3891 | unsigned long flags; |
| 3892 | |
| 3893 | if (!func) |
| 3894 | return -EINVAL; |
| 3895 | |
| 3896 | fi = usb_find_function(func->name); |
| 3897 | if (!fi) |
| 3898 | return -EINVAL; |
| 3899 | |
| 3900 | if (ui->running) { |
| 3901 | disable_irq(ui->irq); |
| 3902 | spin_lock_irqsave(&ui->lock, flags); |
| 3903 | ui->running = 0; |
| 3904 | ui->online = 0; |
| 3905 | ui->bound = 0; |
| 3906 | spin_unlock_irqrestore(&ui->lock, flags); |
| 3907 | usb_uninit(ui); |
| 3908 | /* we should come out of lpm to access registers */ |
| 3909 | if (ui->in_lpm) { |
| 3910 | if (PHY_TYPE(ui->phy_info) == USB_PHY_EXTERNAL) { |
| 3911 | disable_irq(ui->gpio_irq[0]); |
| 3912 | disable_irq(ui->gpio_irq[1]); |
| 3913 | } |
| 3914 | usb_lpm_exit(ui); |
| 3915 | if (cancel_work_sync(&ui->li.wakeup_phy)) |
| 3916 | usb_lpm_wakeup_phy(NULL); |
| 3917 | ui->in_lpm = 0; |
| 3918 | } |
| 3919 | /* disable usb and session valid interrupts */ |
| 3920 | writel(0, USB_USBINTR); |
| 3921 | writel(readl(USB_OTGSC) & ~OTGSC_BSVIE, USB_OTGSC); |
| 3922 | |
| 3923 | /* stop the controller */ |
| 3924 | usb_disable_pullup(ui); |
| 3925 | msleep(100); |
| 3926 | enable_irq(ui->irq); |
| 3927 | } |
| 3928 | |
| 3929 | pr_info("%s: func->name = %s\n", __func__, func->name); |
| 3930 | |
| 3931 | ui->composition = NULL; |
| 3932 | |
| 3933 | if (func->configure) |
| 3934 | func->configure(0, func->context); |
| 3935 | if (func->unbind) |
| 3936 | func->unbind(func->context); |
| 3937 | |
| 3938 | list_del(&fi->list); |
| 3939 | for (i = 0; i < ui->num_funcs; i++) |
| 3940 | if (fi == ui->func[i]) |
| 3941 | ui->func[i] = NULL; |
| 3942 | kfree(fi); |
| 3943 | return 0; |
| 3944 | } |
| 3945 | EXPORT_SYMBOL(usb_function_unregister); |
| 3946 | |
| 3947 | MODULE_LICENSE("GPL"); |
| 3948 | |