| /***************************************************************************** |
| * * |
| * File: espi.c * |
| * $Revision: 1.14 $ * |
| * $Date: 2005/05/14 00:59:32 $ * |
| * Description: * |
| * Ethernet SPI functionality. * |
| * part of the Chelsio 10Gb Ethernet Driver. * |
| * * |
| * This program is free software; you can redistribute it and/or modify * |
| * it under the terms of the GNU General Public License, version 2, as * |
| * published by the Free Software Foundation. * |
| * * |
| * You should have received a copy of the GNU General Public License along * |
| * with this program; if not, write to the Free Software Foundation, Inc., * |
| * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * |
| * * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * |
| * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. * |
| * * |
| * http://www.chelsio.com * |
| * * |
| * Copyright (c) 2003 - 2005 Chelsio Communications, Inc. * |
| * All rights reserved. * |
| * * |
| * Maintainers: maintainers@chelsio.com * |
| * * |
| * Authors: Dimitrios Michailidis <dm@chelsio.com> * |
| * Tina Yang <tainay@chelsio.com> * |
| * Felix Marti <felix@chelsio.com> * |
| * Scott Bardone <sbardone@chelsio.com> * |
| * Kurt Ottaway <kottaway@chelsio.com> * |
| * Frank DiMambro <frank@chelsio.com> * |
| * * |
| * History: * |
| * * |
| ****************************************************************************/ |
| |
| #include "common.h" |
| #include "regs.h" |
| #include "espi.h" |
| |
| struct peespi { |
| adapter_t *adapter; |
| struct espi_intr_counts intr_cnt; |
| u32 misc_ctrl; |
| spinlock_t lock; |
| }; |
| |
| #define ESPI_INTR_MASK (F_DIP4ERR | F_RXDROP | F_TXDROP | F_RXOVERFLOW | \ |
| F_RAMPARITYERR | F_DIP2PARITYERR) |
| #define MON_MASK (V_MONITORED_PORT_NUM(3) | F_MONITORED_DIRECTION \ |
| | F_MONITORED_INTERFACE) |
| |
| #define TRICN_CNFG 14 |
| #define TRICN_CMD_READ 0x11 |
| #define TRICN_CMD_WRITE 0x21 |
| #define TRICN_CMD_ATTEMPTS 10 |
| |
| static int tricn_write(adapter_t *adapter, int bundle_addr, int module_addr, |
| int ch_addr, int reg_offset, u32 wr_data) |
| { |
| int busy, attempts = TRICN_CMD_ATTEMPTS; |
| |
| writel(V_WRITE_DATA(wr_data) | |
| V_REGISTER_OFFSET(reg_offset) | |
| V_CHANNEL_ADDR(ch_addr) | V_MODULE_ADDR(module_addr) | |
| V_BUNDLE_ADDR(bundle_addr) | |
| V_SPI4_COMMAND(TRICN_CMD_WRITE), |
| adapter->regs + A_ESPI_CMD_ADDR); |
| writel(0, adapter->regs + A_ESPI_GOSTAT); |
| |
| do { |
| busy = readl(adapter->regs + A_ESPI_GOSTAT) & F_ESPI_CMD_BUSY; |
| } while (busy && --attempts); |
| |
| if (busy) |
| CH_ERR("%s: TRICN write timed out\n", adapter->name); |
| |
| return busy; |
| } |
| |
| /* 1. Deassert rx_reset_core. */ |
| /* 2. Program TRICN_CNFG registers. */ |
| /* 3. Deassert rx_reset_link */ |
| static int tricn_init(adapter_t *adapter) |
| { |
| int i = 0; |
| int stat = 0; |
| int timeout = 0; |
| int is_ready = 0; |
| |
| /* 1 */ |
| timeout=1000; |
| do { |
| stat = readl(adapter->regs + A_ESPI_RX_RESET); |
| is_ready = (stat & 0x4); |
| timeout--; |
| udelay(5); |
| } while (!is_ready || (timeout==0)); |
| writel(0x2, adapter->regs + A_ESPI_RX_RESET); |
| if (timeout==0) |
| { |
| CH_ERR("ESPI : ERROR : Timeout tricn_init() \n"); |
| t1_fatal_err(adapter); |
| } |
| |
| /* 2 */ |
| tricn_write(adapter, 0, 0, 0, TRICN_CNFG, 0x81); |
| tricn_write(adapter, 0, 1, 0, TRICN_CNFG, 0x81); |
| tricn_write(adapter, 0, 2, 0, TRICN_CNFG, 0x81); |
| for (i=1; i<= 8; i++) tricn_write(adapter, 0, 0, i, TRICN_CNFG, 0xf1); |
| for (i=1; i<= 2; i++) tricn_write(adapter, 0, 1, i, TRICN_CNFG, 0xf1); |
| for (i=1; i<= 3; i++) tricn_write(adapter, 0, 2, i, TRICN_CNFG, 0xe1); |
| for (i=4; i<= 4; i++) tricn_write(adapter, 0, 2, i, TRICN_CNFG, 0xf1); |
| for (i=5; i<= 5; i++) tricn_write(adapter, 0, 2, i, TRICN_CNFG, 0xe1); |
| for (i=6; i<= 6; i++) tricn_write(adapter, 0, 2, i, TRICN_CNFG, 0xf1); |
| for (i=7; i<= 7; i++) tricn_write(adapter, 0, 2, i, TRICN_CNFG, 0x80); |
| for (i=8; i<= 8; i++) tricn_write(adapter, 0, 2, i, TRICN_CNFG, 0xf1); |
| |
| /* 3 */ |
| writel(0x3, adapter->regs + A_ESPI_RX_RESET); |
| |
| return 0; |
| } |
| |
| void t1_espi_intr_enable(struct peespi *espi) |
| { |
| u32 enable, pl_intr = readl(espi->adapter->regs + A_PL_ENABLE); |
| |
| /* |
| * Cannot enable ESPI interrupts on T1B because HW asserts the |
| * interrupt incorrectly, namely the driver gets ESPI interrupts |
| * but no data is actually dropped (can verify this reading the ESPI |
| * drop registers). Also, once the ESPI interrupt is asserted it |
| * cannot be cleared (HW bug). |
| */ |
| enable = t1_is_T1B(espi->adapter) ? 0 : ESPI_INTR_MASK; |
| writel(enable, espi->adapter->regs + A_ESPI_INTR_ENABLE); |
| writel(pl_intr | F_PL_INTR_ESPI, espi->adapter->regs + A_PL_ENABLE); |
| } |
| |
| void t1_espi_intr_clear(struct peespi *espi) |
| { |
| writel(0xffffffff, espi->adapter->regs + A_ESPI_INTR_STATUS); |
| writel(F_PL_INTR_ESPI, espi->adapter->regs + A_PL_CAUSE); |
| } |
| |
| void t1_espi_intr_disable(struct peespi *espi) |
| { |
| u32 pl_intr = readl(espi->adapter->regs + A_PL_ENABLE); |
| |
| writel(0, espi->adapter->regs + A_ESPI_INTR_ENABLE); |
| writel(pl_intr & ~F_PL_INTR_ESPI, espi->adapter->regs + A_PL_ENABLE); |
| } |
| |
| int t1_espi_intr_handler(struct peespi *espi) |
| { |
| u32 cnt; |
| u32 status = readl(espi->adapter->regs + A_ESPI_INTR_STATUS); |
| |
| if (status & F_DIP4ERR) |
| espi->intr_cnt.DIP4_err++; |
| if (status & F_RXDROP) |
| espi->intr_cnt.rx_drops++; |
| if (status & F_TXDROP) |
| espi->intr_cnt.tx_drops++; |
| if (status & F_RXOVERFLOW) |
| espi->intr_cnt.rx_ovflw++; |
| if (status & F_RAMPARITYERR) |
| espi->intr_cnt.parity_err++; |
| if (status & F_DIP2PARITYERR) { |
| espi->intr_cnt.DIP2_parity_err++; |
| |
| /* |
| * Must read the error count to clear the interrupt |
| * that it causes. |
| */ |
| cnt = readl(espi->adapter->regs + A_ESPI_DIP2_ERR_COUNT); |
| } |
| |
| /* |
| * For T1B we need to write 1 to clear ESPI interrupts. For T2+ we |
| * write the status as is. |
| */ |
| if (status && t1_is_T1B(espi->adapter)) |
| status = 1; |
| writel(status, espi->adapter->regs + A_ESPI_INTR_STATUS); |
| return 0; |
| } |
| |
| const struct espi_intr_counts *t1_espi_get_intr_counts(struct peespi *espi) |
| { |
| return &espi->intr_cnt; |
| } |
| |
| static void espi_setup_for_pm3393(adapter_t *adapter) |
| { |
| u32 wmark = t1_is_T1B(adapter) ? 0x4000 : 0x3200; |
| |
| writel(0x1f4, adapter->regs + A_ESPI_SCH_TOKEN0); |
| writel(0x1f4, adapter->regs + A_ESPI_SCH_TOKEN1); |
| writel(0x1f4, adapter->regs + A_ESPI_SCH_TOKEN2); |
| writel(0x1f4, adapter->regs + A_ESPI_SCH_TOKEN3); |
| writel(0x100, adapter->regs + A_ESPI_RX_FIFO_ALMOST_EMPTY_WATERMARK); |
| writel(wmark, adapter->regs + A_ESPI_RX_FIFO_ALMOST_FULL_WATERMARK); |
| writel(3, adapter->regs + A_ESPI_CALENDAR_LENGTH); |
| writel(0x08000008, adapter->regs + A_ESPI_TRAIN); |
| writel(V_RX_NPORTS(1) | V_TX_NPORTS(1), adapter->regs + A_PORT_CONFIG); |
| } |
| |
| /* T2 Init part -- */ |
| /* 1. Set T_ESPI_MISCCTRL_ADDR */ |
| /* 2. Init ESPI registers. */ |
| /* 3. Init TriCN Hard Macro */ |
| int t1_espi_init(struct peespi *espi, int mac_type, int nports) |
| { |
| u32 cnt; |
| |
| u32 status_enable_extra = 0; |
| adapter_t *adapter = espi->adapter; |
| u32 status, burstval = 0x800100; |
| |
| /* Disable ESPI training. MACs that can handle it enable it below. */ |
| writel(0, adapter->regs + A_ESPI_TRAIN); |
| |
| if (is_T2(adapter)) { |
| writel(V_OUT_OF_SYNC_COUNT(4) | |
| V_DIP2_PARITY_ERR_THRES(3) | |
| V_DIP4_THRES(1), adapter->regs + A_ESPI_MISC_CONTROL); |
| if (nports == 4) { |
| /* T204: maxburst1 = 0x40, maxburst2 = 0x20 */ |
| burstval = 0x200040; |
| } |
| } |
| writel(burstval, adapter->regs + A_ESPI_MAXBURST1_MAXBURST2); |
| |
| switch (mac_type) { |
| case CHBT_MAC_PM3393: |
| espi_setup_for_pm3393(adapter); |
| break; |
| default: |
| return -1; |
| } |
| |
| /* |
| * Make sure any pending interrupts from the SPI are |
| * Cleared before enabling the interrupt. |
| */ |
| writel(ESPI_INTR_MASK, espi->adapter->regs + A_ESPI_INTR_ENABLE); |
| status = readl(espi->adapter->regs + A_ESPI_INTR_STATUS); |
| if (status & F_DIP2PARITYERR) { |
| cnt = readl(espi->adapter->regs + A_ESPI_DIP2_ERR_COUNT); |
| } |
| |
| /* |
| * For T1B we need to write 1 to clear ESPI interrupts. For T2+ we |
| * write the status as is. |
| */ |
| if (status && t1_is_T1B(espi->adapter)) |
| status = 1; |
| writel(status, espi->adapter->regs + A_ESPI_INTR_STATUS); |
| |
| writel(status_enable_extra | F_RXSTATUSENABLE, |
| adapter->regs + A_ESPI_FIFO_STATUS_ENABLE); |
| |
| if (is_T2(adapter)) { |
| tricn_init(adapter); |
| /* |
| * Always position the control at the 1st port egress IN |
| * (sop,eop) counter to reduce PIOs for T/N210 workaround. |
| */ |
| espi->misc_ctrl = (readl(adapter->regs + A_ESPI_MISC_CONTROL) |
| & ~MON_MASK) | (F_MONITORED_DIRECTION |
| | F_MONITORED_INTERFACE); |
| writel(espi->misc_ctrl, adapter->regs + A_ESPI_MISC_CONTROL); |
| spin_lock_init(&espi->lock); |
| } |
| |
| return 0; |
| } |
| |
| void t1_espi_destroy(struct peespi *espi) |
| { |
| kfree(espi); |
| } |
| |
| struct peespi *t1_espi_create(adapter_t *adapter) |
| { |
| struct peespi *espi = kzalloc(sizeof(*espi), GFP_KERNEL); |
| |
| if (espi) |
| espi->adapter = adapter; |
| return espi; |
| } |
| |
| void t1_espi_set_misc_ctrl(adapter_t *adapter, u32 val) |
| { |
| struct peespi *espi = adapter->espi; |
| |
| if (!is_T2(adapter)) |
| return; |
| spin_lock(&espi->lock); |
| espi->misc_ctrl = (val & ~MON_MASK) | |
| (espi->misc_ctrl & MON_MASK); |
| writel(espi->misc_ctrl, adapter->regs + A_ESPI_MISC_CONTROL); |
| spin_unlock(&espi->lock); |
| } |
| |
| u32 t1_espi_get_mon(adapter_t *adapter, u32 addr, u8 wait) |
| { |
| u32 sel; |
| |
| struct peespi *espi = adapter->espi; |
| |
| if (!is_T2(adapter)) |
| return 0; |
| sel = V_MONITORED_PORT_NUM((addr & 0x3c) >> 2); |
| if (!wait) { |
| if (!spin_trylock(&espi->lock)) |
| return 0; |
| } |
| else |
| spin_lock(&espi->lock); |
| if ((sel != (espi->misc_ctrl & MON_MASK))) { |
| writel(((espi->misc_ctrl & ~MON_MASK) | sel), |
| adapter->regs + A_ESPI_MISC_CONTROL); |
| sel = readl(adapter->regs + A_ESPI_SCH_TOKEN3); |
| writel(espi->misc_ctrl, adapter->regs + A_ESPI_MISC_CONTROL); |
| } |
| else |
| sel = readl(adapter->regs + A_ESPI_SCH_TOKEN3); |
| spin_unlock(&espi->lock); |
| return sel; |
| } |