Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c
new file mode 100644
index 0000000..90285f1
--- /dev/null
+++ b/drivers/usb/host/ohci-omap.c
@@ -0,0 +1,560 @@
+/*
+ * OHCI HCD (Host Controller Driver) for USB.
+ *
+ * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
+ * (C) Copyright 2000-2005 David Brownell
+ * (C) Copyright 2002 Hewlett-Packard Company
+ *
+ * OMAP Bus Glue
+ *
+ * Modified for OMAP by Tony Lindgren <tony@atomide.com>
+ * Based on the 2.4 OMAP OHCI driver originally done by MontaVista Software Inc.
+ * and on ohci-sa1111.c by Christopher Hoover <ch@hpl.hp.com>
+ *
+ * This file is licenced under the GPL.
+ */
+
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/mach-types.h>
+
+#include <asm/arch/hardware.h>
+#include <asm/arch/mux.h>
+#include <asm/arch/irqs.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/fpga.h>
+#include <asm/arch/usb.h>
+#include <asm/hardware/clock.h>
+
+
+/* OMAP-1510 OHCI has its own MMU for DMA */
+#define OMAP1510_LB_MEMSIZE 32 /* Should be same as SDRAM size */
+#define OMAP1510_LB_CLOCK_DIV 0xfffec10c
+#define OMAP1510_LB_MMU_CTL 0xfffec208
+#define OMAP1510_LB_MMU_LCK 0xfffec224
+#define OMAP1510_LB_MMU_LD_TLB 0xfffec228
+#define OMAP1510_LB_MMU_CAM_H 0xfffec22c
+#define OMAP1510_LB_MMU_CAM_L 0xfffec230
+#define OMAP1510_LB_MMU_RAM_H 0xfffec234
+#define OMAP1510_LB_MMU_RAM_L 0xfffec238
+
+
+#ifndef CONFIG_ARCH_OMAP
+#error "This file is OMAP bus glue. CONFIG_OMAP must be defined."
+#endif
+
+#ifdef CONFIG_TPS65010
+#include <asm/arch/tps65010.h>
+#else
+
+#define LOW 0
+#define HIGH 1
+
+#define GPIO1 1
+
+static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
+{
+ return 0;
+}
+
+#endif
+
+extern int usb_disabled(void);
+extern int ocpi_enable(void);
+
+static struct clk *usb_host_ck;
+
+static void omap_ohci_clock_power(int on)
+{
+ if (on) {
+ clk_enable(usb_host_ck);
+ /* guesstimate for T5 == 1x 32K clock + APLL lock time */
+ udelay(100);
+ } else {
+ clk_disable(usb_host_ck);
+ }
+}
+
+/*
+ * Board specific gang-switched transceiver power on/off.
+ * NOTE: OSK supplies power from DC, not battery.
+ */
+static int omap_ohci_transceiver_power(int on)
+{
+ if (on) {
+ if (machine_is_omap_innovator() && cpu_is_omap1510())
+ fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
+ | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
+ INNOVATOR_FPGA_CAM_USB_CONTROL);
+ else if (machine_is_omap_osk())
+ tps65010_set_gpio_out_value(GPIO1, LOW);
+ } else {
+ if (machine_is_omap_innovator() && cpu_is_omap1510())
+ fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
+ & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
+ INNOVATOR_FPGA_CAM_USB_CONTROL);
+ else if (machine_is_omap_osk())
+ tps65010_set_gpio_out_value(GPIO1, HIGH);
+ }
+
+ return 0;
+}
+
+/*
+ * OMAP-1510 specific Local Bus clock on/off
+ */
+static int omap_1510_local_bus_power(int on)
+{
+ if (on) {
+ omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
+ udelay(200);
+ } else {
+ omap_writel(0, OMAP1510_LB_MMU_CTL);
+ }
+
+ return 0;
+}
+
+/*
+ * OMAP-1510 specific Local Bus initialization
+ * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
+ * See also arch/mach-omap/memory.h for __virt_to_dma() and
+ * __dma_to_virt() which need to match with the physical
+ * Local Bus address below.
+ */
+static int omap_1510_local_bus_init(void)
+{
+ unsigned int tlb;
+ unsigned long lbaddr, physaddr;
+
+ omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4,
+ OMAP1510_LB_CLOCK_DIV);
+
+ /* Configure the Local Bus MMU table */
+ for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
+ lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
+ physaddr = tlb * 0x00100000 + PHYS_OFFSET;
+ omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
+ omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc,
+ OMAP1510_LB_MMU_CAM_L);
+ omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
+ omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
+ omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
+ omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
+ }
+
+ /* Enable the walking table */
+ omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
+ udelay(200);
+
+ return 0;
+}
+
+#ifdef CONFIG_USB_OTG
+
+static void start_hnp(struct ohci_hcd *ohci)
+{
+ const unsigned port = ohci_to_hcd(ohci)->self.otg_port - 1;
+ unsigned long flags;
+
+ otg_start_hnp(ohci->transceiver);
+
+ local_irq_save(flags);
+ ohci->transceiver->state = OTG_STATE_A_SUSPEND;
+ writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
+ OTG_CTRL_REG &= ~OTG_A_BUSREQ;
+ local_irq_restore(flags);
+}
+
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+static int omap_start_hc(struct ohci_hcd *ohci, struct platform_device *pdev)
+{
+ struct omap_usb_config *config = pdev->dev.platform_data;
+ int need_transceiver = (config->otg != 0);
+ int ret;
+
+ dev_dbg(&pdev->dev, "starting USB Controller\n");
+
+ if (config->otg) {
+ ohci_to_hcd(ohci)->self.otg_port = config->otg;
+ /* default/minimum OTG power budget: 8 mA */
+ ohci->power_budget = 8;
+ }
+
+ /* boards can use OTG transceivers in non-OTG modes */
+ need_transceiver = need_transceiver
+ || machine_is_omap_h2() || machine_is_omap_h3();
+
+ if (cpu_is_omap16xx())
+ ocpi_enable();
+
+#ifdef CONFIG_ARCH_OMAP_OTG
+ if (need_transceiver) {
+ ohci->transceiver = otg_get_transceiver();
+ if (ohci->transceiver) {
+ int status = otg_set_host(ohci->transceiver,
+ &ohci_to_hcd(ohci)->self);
+ dev_dbg(&pdev->dev, "init %s transceiver, status %d\n",
+ ohci->transceiver->label, status);
+ if (status) {
+ if (ohci->transceiver)
+ put_device(ohci->transceiver->dev);
+ return status;
+ }
+ } else {
+ dev_err(&pdev->dev, "can't find transceiver\n");
+ return -ENODEV;
+ }
+ }
+#endif
+
+ omap_ohci_clock_power(1);
+
+ if (cpu_is_omap1510()) {
+ omap_1510_local_bus_power(1);
+ omap_1510_local_bus_init();
+ }
+
+ if ((ret = ohci_init(ohci)) < 0)
+ return ret;
+
+ /* board-specific power switching and overcurrent support */
+ if (machine_is_omap_osk() || machine_is_omap_innovator()) {
+ u32 rh = roothub_a (ohci);
+
+ /* power switching (ganged by default) */
+ rh &= ~RH_A_NPS;
+
+ /* TPS2045 switch for internal transceiver (port 1) */
+ if (machine_is_omap_osk()) {
+ ohci->power_budget = 250;
+
+ rh &= ~RH_A_NOCP;
+
+ /* gpio9 for overcurrent detction */
+ omap_cfg_reg(W8_1610_GPIO9);
+ omap_request_gpio(9);
+ omap_set_gpio_direction(9, 1 /* IN */);
+
+ /* for paranoia's sake: disable USB.PUEN */
+ omap_cfg_reg(W4_USB_HIGHZ);
+ }
+ ohci_writel(ohci, rh, &ohci->regs->roothub.a);
+ distrust_firmware = 0;
+ }
+
+ /* FIXME khubd hub requests should manage power switching */
+ omap_ohci_transceiver_power(1);
+
+ /* board init will have already handled HMC and mux setup.
+ * any external transceiver should already be initialized
+ * too, so all configured ports use the right signaling now.
+ */
+
+ return 0;
+}
+
+static void omap_stop_hc(struct platform_device *pdev)
+{
+ dev_dbg(&pdev->dev, "stopping USB Controller\n");
+ omap_ohci_clock_power(0);
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+void usb_hcd_omap_remove (struct usb_hcd *, struct platform_device *);
+
+/* configure so an HC device and id are always provided */
+/* always called with process context; sleeping is OK */
+
+
+/**
+ * usb_hcd_omap_probe - initialize OMAP-based HCDs
+ * Context: !in_interrupt()
+ *
+ * Allocates basic resources for this USB host controller, and
+ * then invokes the start() method for the HCD associated with it
+ * through the hotplug entry's driver_data.
+ */
+int usb_hcd_omap_probe (const struct hc_driver *driver,
+ struct platform_device *pdev)
+{
+ int retval;
+ struct usb_hcd *hcd = 0;
+ struct ohci_hcd *ohci;
+
+ if (pdev->num_resources != 2) {
+ printk(KERN_ERR "hcd probe: invalid num_resources: %i\n",
+ pdev->num_resources);
+ return -ENODEV;
+ }
+
+ if (pdev->resource[0].flags != IORESOURCE_MEM
+ || pdev->resource[1].flags != IORESOURCE_IRQ) {
+ printk(KERN_ERR "hcd probe: invalid resource type\n");
+ return -ENODEV;
+ }
+
+ usb_host_ck = clk_get(0, "usb_hhc_ck");
+ if (IS_ERR(usb_host_ck))
+ return PTR_ERR(usb_host_ck);
+
+ hcd = usb_create_hcd (driver, &pdev->dev, pdev->dev.bus_id);
+ if (!hcd) {
+ retval = -ENOMEM;
+ goto err0;
+ }
+ hcd->rsrc_start = pdev->resource[0].start;
+ hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
+
+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+ dev_dbg(&pdev->dev, "request_mem_region failed\n");
+ retval = -EBUSY;
+ goto err1;
+ }
+
+ hcd->regs = (void __iomem *) (int) IO_ADDRESS(hcd->rsrc_start);
+
+ ohci = hcd_to_ohci(hcd);
+ ohci_hcd_init(ohci);
+
+ retval = omap_start_hc(ohci, pdev);
+ if (retval < 0)
+ goto err2;
+
+ retval = usb_add_hcd(hcd, platform_get_irq(pdev, 0), SA_INTERRUPT);
+ if (retval == 0)
+ return retval;
+
+ omap_stop_hc(pdev);
+err2:
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err1:
+ usb_put_hcd(hcd);
+err0:
+ clk_put(usb_host_ck);
+ return retval;
+}
+
+
+/* may be called with controller, bus, and devices active */
+
+/**
+ * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
+ * @dev: USB Host Controller being removed
+ * Context: !in_interrupt()
+ *
+ * Reverses the effect of usb_hcd_omap_probe(), first invoking
+ * the HCD's stop() method. It is always called from a thread
+ * context, normally "rmmod", "apmd", or something similar.
+ *
+ */
+void usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
+{
+ usb_remove_hcd(hcd);
+ if (machine_is_omap_osk())
+ omap_free_gpio(9);
+ omap_stop_hc(pdev);
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+ usb_put_hcd(hcd);
+ clk_put(usb_host_ck);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int __devinit
+ohci_omap_start (struct usb_hcd *hcd)
+{
+ struct omap_usb_config *config;
+ struct ohci_hcd *ohci = hcd_to_ohci (hcd);
+ int ret;
+
+ config = hcd->self.controller->platform_data;
+ if (config->otg || config->rwc)
+ writel(OHCI_CTRL_RWC, &ohci->regs->control);
+
+ if ((ret = ohci_run (ohci)) < 0) {
+ dev_err(hcd->self.controller, "can't start\n");
+ ohci_stop (hcd);
+ return ret;
+ }
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static const struct hc_driver ohci_omap_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "OMAP OHCI",
+ .hcd_priv_size = sizeof(struct ohci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ohci_irq,
+ .flags = HCD_USB11 | HCD_MEMORY,
+
+ /*
+ * basic lifecycle operations
+ */
+ .start = ohci_omap_start,
+ .stop = ohci_stop,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = ohci_urb_enqueue,
+ .urb_dequeue = ohci_urb_dequeue,
+ .endpoint_disable = ohci_endpoint_disable,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = ohci_get_frame,
+
+ /*
+ * root hub support
+ */
+ .hub_status_data = ohci_hub_status_data,
+ .hub_control = ohci_hub_control,
+#ifdef CONFIG_USB_SUSPEND
+ .hub_suspend = ohci_hub_suspend,
+ .hub_resume = ohci_hub_resume,
+#endif
+ .start_port_reset = ohci_start_port_reset,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int ohci_hcd_omap_drv_probe(struct device *dev)
+{
+ return usb_hcd_omap_probe(&ohci_omap_hc_driver,
+ to_platform_device(dev));
+}
+
+static int ohci_hcd_omap_drv_remove(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct ohci_hcd *ohci = hcd_to_ohci (hcd);
+
+ usb_hcd_omap_remove(hcd, pdev);
+ if (ohci->transceiver) {
+ (void) otg_set_host(ohci->transceiver, 0);
+ put_device(ohci->transceiver->dev);
+ }
+ dev_set_drvdata(dev, NULL);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+#ifdef CONFIG_PM
+
+/* states match PCI usage, always suspending the root hub except that
+ * 4 ~= D3cold (ACPI D3) with clock off (resume sees reset).
+ */
+
+static int ohci_omap_suspend(struct device *dev, u32 state, u32 level)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(dev_get_drvdata(dev));
+ int status = -EINVAL;
+
+ if (level != SUSPEND_POWER_DOWN)
+ return 0;
+ if (state <= dev->power.power_state)
+ return 0;
+
+ dev_dbg(dev, "suspend to %d\n", state);
+ down(&ohci_to_hcd(ohci)->self.root_hub->serialize);
+ status = ohci_hub_suspend(ohci_to_hcd(ohci));
+ if (status == 0) {
+ if (state >= 4) {
+ omap_ohci_clock_power(0);
+ ohci_to_hcd(ohci)->self.root_hub->state =
+ USB_STATE_SUSPENDED;
+ state = 4;
+ }
+ ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
+ dev->power.power_state = state;
+ }
+ up(&ohci_to_hcd(ohci)->self.root_hub->serialize);
+ return status;
+}
+
+static int ohci_omap_resume(struct device *dev, u32 level)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(dev_get_drvdata(dev));
+ int status = 0;
+
+ if (level != RESUME_POWER_ON)
+ return 0;
+
+ switch (dev->power.power_state) {
+ case 0:
+ break;
+ case 4:
+ if (time_before(jiffies, ohci->next_statechange))
+ msleep(5);
+ ohci->next_statechange = jiffies;
+ omap_ohci_clock_power(1);
+ /* FALLTHROUGH */
+ default:
+ dev_dbg(dev, "resume from %d\n", dev->power.power_state);
+#ifdef CONFIG_USB_SUSPEND
+ /* get extra cleanup even if remote wakeup isn't in use */
+ status = usb_resume_device(ohci_to_hcd(ohci)->self.root_hub);
+#else
+ down(&ohci_to_hcd(ohci)->self.root_hub->serialize);
+ status = ohci_hub_resume(ohci_to_hcd(ohci));
+ up(&ohci_to_hcd(ohci)->self.root_hub->serialize);
+#endif
+ if (status == 0)
+ dev->power.power_state = 0;
+ break;
+ }
+ return status;
+}
+
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Driver definition to register with the OMAP bus
+ */
+static struct device_driver ohci_hcd_omap_driver = {
+ .name = "ohci",
+ .bus = &platform_bus_type,
+ .probe = ohci_hcd_omap_drv_probe,
+ .remove = ohci_hcd_omap_drv_remove,
+#ifdef CONFIG_PM
+ .suspend = ohci_omap_suspend,
+ .resume = ohci_omap_resume,
+#endif
+};
+
+static int __init ohci_hcd_omap_init (void)
+{
+ printk (KERN_DEBUG "%s: " DRIVER_INFO " (OMAP)\n", hcd_name);
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_debug("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
+ sizeof (struct ed), sizeof (struct td));
+
+ return driver_register(&ohci_hcd_omap_driver);
+}
+
+static void __exit ohci_hcd_omap_cleanup (void)
+{
+ driver_unregister(&ohci_hcd_omap_driver);
+}
+
+module_init (ohci_hcd_omap_init);
+module_exit (ohci_hcd_omap_cleanup);