/***************************************************************************** * * * 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; } static int tricn_init(adapter_t *adapter) { int i, sme = 1; if (!(readl(adapter->regs + A_ESPI_RX_RESET) & F_RX_CLK_STATUS)) { CH_ERR("%s: ESPI clock not ready\n", adapter->name); return -1; } writel(F_ESPI_RX_CORE_RST, adapter->regs + A_ESPI_RX_RESET); 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); tricn_write(adapter, 0, 2, 4, TRICN_CNFG, 0xf1); tricn_write(adapter, 0, 2, 5, TRICN_CNFG, 0xe1); tricn_write(adapter, 0, 2, 6, TRICN_CNFG, 0xf1); tricn_write(adapter, 0, 2, 7, TRICN_CNFG, 0x80); tricn_write(adapter, 0, 2, 8, TRICN_CNFG, 0xf1); writel(F_ESPI_RX_CORE_RST | F_ESPI_RX_LNK_RST, 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) { readl(espi->adapter->regs + A_ESPI_DIP2_ERR_COUNT); 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 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. */ 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); } static void espi_setup_for_vsc7321(adapter_t *adapter) { writel(0x1f4, adapter->regs + A_ESPI_SCH_TOKEN0); writel(0x1f401f4, adapter->regs + A_ESPI_SCH_TOKEN1); writel(0x1f4, adapter->regs + A_ESPI_SCH_TOKEN2); writel(0xa00, adapter->regs + A_ESPI_RX_FIFO_ALMOST_FULL_WATERMARK); writel(0x1ff, adapter->regs + A_ESPI_RX_FIFO_ALMOST_EMPTY_WATERMARK); writel(1, adapter->regs + A_ESPI_CALENDAR_LENGTH); writel(V_RX_NPORTS(4) | V_TX_NPORTS(4), adapter->regs + A_PORT_CONFIG); writel(0x08000008, adapter->regs + A_ESPI_TRAIN); } /* * Note that T1B requires at least 2 ports for IXF1010 due to a HW bug. */ static void espi_setup_for_ixf1010(adapter_t *adapter, int nports) { writel(1, adapter->regs + A_ESPI_CALENDAR_LENGTH); if (nports == 4) { if (is_T2(adapter)) { writel(0xf00, adapter->regs + A_ESPI_RX_FIFO_ALMOST_FULL_WATERMARK); writel(0x3c0, adapter->regs + A_ESPI_RX_FIFO_ALMOST_EMPTY_WATERMARK); } else { writel(0x7ff, adapter->regs + A_ESPI_RX_FIFO_ALMOST_FULL_WATERMARK); writel(0x1ff, adapter->regs + A_ESPI_RX_FIFO_ALMOST_EMPTY_WATERMARK); } } else { writel(0x1fff, adapter->regs + A_ESPI_RX_FIFO_ALMOST_FULL_WATERMARK); writel(0x7ff, adapter->regs + A_ESPI_RX_FIFO_ALMOST_EMPTY_WATERMARK); } writel(V_RX_NPORTS(nports) | V_TX_NPORTS(nports), adapter->regs + A_PORT_CONFIG); } int t1_espi_init(struct peespi *espi, int mac_type, int nports) { u32 status_enable_extra = 0; adapter_t *adapter = espi->adapter; /* 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); writel(nports == 4 ? 0x200040 : 0x1000080, adapter->regs + A_ESPI_MAXBURST1_MAXBURST2); } else writel(0x800100, adapter->regs + A_ESPI_MAXBURST1_MAXBURST2); if (mac_type == CHBT_MAC_PM3393) espi_setup_for_pm3393(adapter); else if (mac_type == CHBT_MAC_VSC7321) espi_setup_for_vsc7321(adapter); else if (mac_type == CHBT_MAC_IXF1010) { status_enable_extra = F_INTEL1010MODE; espi_setup_for_ixf1010(adapter, nports); } else return -1; 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); espi->misc_ctrl &= ~MON_MASK; espi->misc_ctrl |= F_MONITORED_DIRECTION; if (adapter->params.nports == 1) espi->misc_ctrl |= 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) { struct peespi *espi = adapter->espi; u32 sel; 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; } /* * This function is for T204 only. * compare with t1_espi_get_mon(), it reads espiInTxSop[0 ~ 3] in * one shot, since there is no per port counter on the out side. */ int t1_espi_get_mon_t204(adapter_t *adapter, u32 *valp, u8 wait) { struct peespi *espi = adapter->espi; u8 i, nport = (u8)adapter->params.nports; if (!wait) { if (!spin_trylock(&espi->lock)) return -1; } else spin_lock(&espi->lock); if ((espi->misc_ctrl & MON_MASK) != F_MONITORED_DIRECTION) { espi->misc_ctrl = (espi->misc_ctrl & ~MON_MASK) | F_MONITORED_DIRECTION; writel(espi->misc_ctrl, adapter->regs + A_ESPI_MISC_CONTROL); } for (i = 0 ; i < nport; i++, valp++) { if (i) { writel(espi->misc_ctrl | V_MONITORED_PORT_NUM(i), adapter->regs + A_ESPI_MISC_CONTROL); } *valp = readl(adapter->regs + A_ESPI_SCH_TOKEN3); } writel(espi->misc_ctrl, adapter->regs + A_ESPI_MISC_CONTROL); spin_unlock(&espi->lock); return 0; }