/***************************************************************************** * * * 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 sme = 1; int stat = 0; int timeout = 0; int is_ready = 0; int dynamic_deskew = 0; if (dynamic_deskew) sme = 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 */ if (sme) { 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 = kmalloc(sizeof(*espi), GFP_KERNEL); memset(espi, 0, sizeof(*espi)); 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; }