805 lines
22 KiB
C
805 lines
22 KiB
C
/*
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* cb710/mmc.c
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*
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* Copyright by Michał Mirosław, 2008-2009
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include "cb710-mmc.h"
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static const u8 cb710_clock_divider_log2[8] = {
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/* 1, 2, 4, 8, 16, 32, 128, 512 */
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0, 1, 2, 3, 4, 5, 7, 9
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};
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#define CB710_MAX_DIVIDER_IDX \
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(ARRAY_SIZE(cb710_clock_divider_log2) - 1)
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static const u8 cb710_src_freq_mhz[16] = {
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33, 10, 20, 25, 30, 35, 40, 45,
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50, 55, 60, 65, 70, 75, 80, 85
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};
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static void cb710_mmc_set_clock(struct mmc_host *mmc, int hz)
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{
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struct cb710_slot *slot = cb710_mmc_to_slot(mmc);
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struct pci_dev *pdev = cb710_slot_to_chip(slot)->pdev;
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u32 src_freq_idx;
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u32 divider_idx;
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int src_hz;
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/* this is magic, unverifiable for me, unless I get
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* MMC card with cables connected to bus signals */
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pci_read_config_dword(pdev, 0x48, &src_freq_idx);
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src_freq_idx = (src_freq_idx >> 16) & 0xF;
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src_hz = cb710_src_freq_mhz[src_freq_idx] * 1000000;
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for (divider_idx = 0; divider_idx < CB710_MAX_DIVIDER_IDX; ++divider_idx) {
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if (hz >= src_hz >> cb710_clock_divider_log2[divider_idx])
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break;
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}
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if (src_freq_idx)
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divider_idx |= 0x8;
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cb710_pci_update_config_reg(pdev, 0x40, ~0xF0000000, divider_idx << 28);
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dev_dbg(cb710_slot_dev(slot),
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"clock set to %d Hz, wanted %d Hz; flag = %d\n",
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src_hz >> cb710_clock_divider_log2[divider_idx & 7],
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hz, (divider_idx & 8) != 0);
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}
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static void __cb710_mmc_enable_irq(struct cb710_slot *slot,
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unsigned short enable, unsigned short mask)
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{
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/* clear global IE
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* - it gets set later if any interrupt sources are enabled */
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mask |= CB710_MMC_IE_IRQ_ENABLE;
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/* look like interrupt is fired whenever
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* WORD[0x0C] & WORD[0x10] != 0;
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* -> bit 15 port 0x0C seems to be global interrupt enable
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*/
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enable = (cb710_read_port_16(slot, CB710_MMC_IRQ_ENABLE_PORT)
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& ~mask) | enable;
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if (enable)
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enable |= CB710_MMC_IE_IRQ_ENABLE;
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cb710_write_port_16(slot, CB710_MMC_IRQ_ENABLE_PORT, enable);
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}
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static void cb710_mmc_enable_irq(struct cb710_slot *slot,
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unsigned short enable, unsigned short mask)
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{
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struct cb710_mmc_reader *reader = mmc_priv(cb710_slot_to_mmc(slot));
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unsigned long flags;
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spin_lock_irqsave(&reader->irq_lock, flags);
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/* this is the only thing irq_lock protects */
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__cb710_mmc_enable_irq(slot, enable, mask);
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spin_unlock_irqrestore(&reader->irq_lock, flags);
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}
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static void cb710_mmc_reset_events(struct cb710_slot *slot)
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{
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cb710_write_port_8(slot, CB710_MMC_STATUS0_PORT, 0xFF);
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cb710_write_port_8(slot, CB710_MMC_STATUS1_PORT, 0xFF);
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cb710_write_port_8(slot, CB710_MMC_STATUS2_PORT, 0xFF);
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}
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static int cb710_mmc_is_card_inserted(struct cb710_slot *slot)
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{
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return cb710_read_port_8(slot, CB710_MMC_STATUS3_PORT)
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& CB710_MMC_S3_CARD_DETECTED;
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}
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static void cb710_mmc_enable_4bit_data(struct cb710_slot *slot, int enable)
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{
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dev_dbg(cb710_slot_dev(slot), "configuring %d-data-line%s mode\n",
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enable ? 4 : 1, enable ? "s" : "");
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if (enable)
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cb710_modify_port_8(slot, CB710_MMC_CONFIG1_PORT,
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CB710_MMC_C1_4BIT_DATA_BUS, 0);
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else
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cb710_modify_port_8(slot, CB710_MMC_CONFIG1_PORT,
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0, CB710_MMC_C1_4BIT_DATA_BUS);
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}
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static int cb710_check_event(struct cb710_slot *slot, u8 what)
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{
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u16 status;
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status = cb710_read_port_16(slot, CB710_MMC_STATUS_PORT);
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if (status & CB710_MMC_S0_FIFO_UNDERFLOW) {
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/* it is just a guess, so log it */
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dev_dbg(cb710_slot_dev(slot),
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"CHECK : ignoring bit 6 in status %04X\n", status);
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cb710_write_port_8(slot, CB710_MMC_STATUS0_PORT,
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CB710_MMC_S0_FIFO_UNDERFLOW);
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status &= ~CB710_MMC_S0_FIFO_UNDERFLOW;
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}
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if (status & CB710_MMC_STATUS_ERROR_EVENTS) {
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dev_dbg(cb710_slot_dev(slot),
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"CHECK : returning EIO on status %04X\n", status);
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cb710_write_port_8(slot, CB710_MMC_STATUS0_PORT, status & 0xFF);
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cb710_write_port_8(slot, CB710_MMC_STATUS1_PORT,
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CB710_MMC_S1_RESET);
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return -EIO;
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}
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/* 'what' is a bit in MMC_STATUS1 */
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if ((status >> 8) & what) {
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cb710_write_port_8(slot, CB710_MMC_STATUS1_PORT, what);
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return 1;
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}
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return 0;
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}
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static int cb710_wait_for_event(struct cb710_slot *slot, u8 what)
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{
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int err = 0;
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unsigned limit = 2000000; /* FIXME: real timeout */
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#ifdef CONFIG_CB710_DEBUG
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u32 e, x;
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e = cb710_read_port_32(slot, CB710_MMC_STATUS_PORT);
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#endif
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while (!(err = cb710_check_event(slot, what))) {
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if (!--limit) {
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cb710_dump_regs(cb710_slot_to_chip(slot),
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CB710_DUMP_REGS_MMC);
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err = -ETIMEDOUT;
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break;
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}
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udelay(1);
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}
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#ifdef CONFIG_CB710_DEBUG
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x = cb710_read_port_32(slot, CB710_MMC_STATUS_PORT);
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limit = 2000000 - limit;
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if (limit > 100)
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dev_dbg(cb710_slot_dev(slot),
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"WAIT10: waited %d loops, what %d, entry val %08X, exit val %08X\n",
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limit, what, e, x);
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#endif
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return err < 0 ? err : 0;
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}
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static int cb710_wait_while_busy(struct cb710_slot *slot, uint8_t mask)
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{
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unsigned limit = 500000; /* FIXME: real timeout */
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int err = 0;
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#ifdef CONFIG_CB710_DEBUG
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u32 e, x;
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e = cb710_read_port_32(slot, CB710_MMC_STATUS_PORT);
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#endif
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while (cb710_read_port_8(slot, CB710_MMC_STATUS2_PORT) & mask) {
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if (!--limit) {
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cb710_dump_regs(cb710_slot_to_chip(slot),
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CB710_DUMP_REGS_MMC);
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err = -ETIMEDOUT;
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break;
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}
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udelay(1);
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}
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#ifdef CONFIG_CB710_DEBUG
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x = cb710_read_port_32(slot, CB710_MMC_STATUS_PORT);
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limit = 500000 - limit;
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if (limit > 100)
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dev_dbg(cb710_slot_dev(slot),
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"WAIT12: waited %d loops, mask %02X, entry val %08X, exit val %08X\n",
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limit, mask, e, x);
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#endif
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return 0;
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}
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static void cb710_mmc_set_transfer_size(struct cb710_slot *slot,
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size_t count, size_t blocksize)
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{
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cb710_wait_while_busy(slot, CB710_MMC_S2_BUSY_20);
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cb710_write_port_32(slot, CB710_MMC_TRANSFER_SIZE_PORT,
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((count - 1) << 16)|(blocksize - 1));
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dev_vdbg(cb710_slot_dev(slot), "set up for %zu block%s of %zu bytes\n",
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count, count == 1 ? "" : "s", blocksize);
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}
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static void cb710_mmc_fifo_hack(struct cb710_slot *slot)
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{
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/* without this, received data is prepended with 8-bytes of zeroes */
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u32 r1, r2;
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int ok = 0;
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r1 = cb710_read_port_32(slot, CB710_MMC_DATA_PORT);
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r2 = cb710_read_port_32(slot, CB710_MMC_DATA_PORT);
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if (cb710_read_port_8(slot, CB710_MMC_STATUS0_PORT)
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& CB710_MMC_S0_FIFO_UNDERFLOW) {
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cb710_write_port_8(slot, CB710_MMC_STATUS0_PORT,
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CB710_MMC_S0_FIFO_UNDERFLOW);
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ok = 1;
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}
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dev_dbg(cb710_slot_dev(slot),
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"FIFO-read-hack: expected STATUS0 bit was %s\n",
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ok ? "set." : "NOT SET!");
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dev_dbg(cb710_slot_dev(slot),
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"FIFO-read-hack: dwords ignored: %08X %08X - %s\n",
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r1, r2, (r1|r2) ? "BAD (NOT ZERO)!" : "ok");
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}
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static int cb710_mmc_receive_pio(struct cb710_slot *slot,
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struct sg_mapping_iter *miter, size_t dw_count)
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{
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if (!(cb710_read_port_8(slot, CB710_MMC_STATUS2_PORT) & CB710_MMC_S2_FIFO_READY)) {
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int err = cb710_wait_for_event(slot,
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CB710_MMC_S1_PIO_TRANSFER_DONE);
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if (err)
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return err;
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}
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cb710_sg_dwiter_write_from_io(miter,
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slot->iobase + CB710_MMC_DATA_PORT, dw_count);
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return 0;
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}
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static bool cb710_is_transfer_size_supported(struct mmc_data *data)
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{
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return !(data->blksz & 15 && (data->blocks != 1 || data->blksz != 8));
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}
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static int cb710_mmc_receive(struct cb710_slot *slot, struct mmc_data *data)
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{
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struct sg_mapping_iter miter;
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size_t len, blocks = data->blocks;
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int err = 0;
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/* TODO: I don't know how/if the hardware handles non-16B-boundary blocks
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* except single 8B block */
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if (unlikely(data->blksz & 15 && (data->blocks != 1 || data->blksz != 8)))
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return -EINVAL;
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sg_miter_start(&miter, data->sg, data->sg_len, 0);
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cb710_modify_port_8(slot, CB710_MMC_CONFIG2_PORT,
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15, CB710_MMC_C2_READ_PIO_SIZE_MASK);
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cb710_mmc_fifo_hack(slot);
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while (blocks-- > 0) {
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len = data->blksz;
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while (len >= 16) {
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err = cb710_mmc_receive_pio(slot, &miter, 4);
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if (err)
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goto out;
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len -= 16;
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}
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if (!len)
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continue;
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cb710_modify_port_8(slot, CB710_MMC_CONFIG2_PORT,
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len - 1, CB710_MMC_C2_READ_PIO_SIZE_MASK);
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len = (len >= 8) ? 4 : 2;
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err = cb710_mmc_receive_pio(slot, &miter, len);
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if (err)
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goto out;
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}
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out:
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cb710_sg_miter_stop_writing(&miter);
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return err;
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}
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static int cb710_mmc_send(struct cb710_slot *slot, struct mmc_data *data)
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{
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struct sg_mapping_iter miter;
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size_t len, blocks = data->blocks;
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int err = 0;
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/* TODO: I don't know how/if the hardware handles multiple
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* non-16B-boundary blocks */
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if (unlikely(data->blocks > 1 && data->blksz & 15))
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return -EINVAL;
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sg_miter_start(&miter, data->sg, data->sg_len, 0);
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cb710_modify_port_8(slot, CB710_MMC_CONFIG2_PORT,
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0, CB710_MMC_C2_READ_PIO_SIZE_MASK);
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while (blocks-- > 0) {
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len = (data->blksz + 15) >> 4;
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do {
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if (!(cb710_read_port_8(slot, CB710_MMC_STATUS2_PORT)
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& CB710_MMC_S2_FIFO_EMPTY)) {
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err = cb710_wait_for_event(slot,
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CB710_MMC_S1_PIO_TRANSFER_DONE);
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if (err)
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goto out;
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}
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cb710_sg_dwiter_read_to_io(&miter,
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slot->iobase + CB710_MMC_DATA_PORT, 4);
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} while (--len);
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}
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out:
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sg_miter_stop(&miter);
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return err;
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}
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static u16 cb710_encode_cmd_flags(struct cb710_mmc_reader *reader,
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struct mmc_command *cmd)
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{
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unsigned int flags = cmd->flags;
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u16 cb_flags = 0;
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/* Windows driver returned 0 for commands for which no response
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* is expected. It happened that there were only two such commands
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* used: MMC_GO_IDLE_STATE and MMC_GO_INACTIVE_STATE so it might
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* as well be a bug in that driver.
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*
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* Original driver set bit 14 for MMC/SD application
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* commands. There's no difference 'on the wire' and
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* it apparently works without it anyway.
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*/
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switch (flags & MMC_CMD_MASK) {
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case MMC_CMD_AC: cb_flags = CB710_MMC_CMD_AC; break;
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case MMC_CMD_ADTC: cb_flags = CB710_MMC_CMD_ADTC; break;
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case MMC_CMD_BC: cb_flags = CB710_MMC_CMD_BC; break;
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case MMC_CMD_BCR: cb_flags = CB710_MMC_CMD_BCR; break;
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}
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if (flags & MMC_RSP_BUSY)
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cb_flags |= CB710_MMC_RSP_BUSY;
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cb_flags |= cmd->opcode << CB710_MMC_CMD_CODE_SHIFT;
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if (cmd->data && (cmd->data->flags & MMC_DATA_READ))
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cb_flags |= CB710_MMC_DATA_READ;
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if (flags & MMC_RSP_PRESENT) {
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/* Windows driver set 01 at bits 4,3 except for
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* MMC_SET_BLOCKLEN where it set 10. Maybe the
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* hardware can do something special about this
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* command? The original driver looks buggy/incomplete
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* anyway so we ignore this for now.
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*
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* I assume that 00 here means no response is expected.
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*/
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cb_flags |= CB710_MMC_RSP_PRESENT;
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if (flags & MMC_RSP_136)
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cb_flags |= CB710_MMC_RSP_136;
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if (!(flags & MMC_RSP_CRC))
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cb_flags |= CB710_MMC_RSP_NO_CRC;
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}
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return cb_flags;
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}
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static void cb710_receive_response(struct cb710_slot *slot,
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struct mmc_command *cmd)
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{
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unsigned rsp_opcode, wanted_opcode;
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/* Looks like final byte with CRC is always stripped (same as SDHCI) */
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if (cmd->flags & MMC_RSP_136) {
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u32 resp[4];
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resp[0] = cb710_read_port_32(slot, CB710_MMC_RESPONSE3_PORT);
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resp[1] = cb710_read_port_32(slot, CB710_MMC_RESPONSE2_PORT);
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resp[2] = cb710_read_port_32(slot, CB710_MMC_RESPONSE1_PORT);
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resp[3] = cb710_read_port_32(slot, CB710_MMC_RESPONSE0_PORT);
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rsp_opcode = resp[0] >> 24;
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cmd->resp[0] = (resp[0] << 8)|(resp[1] >> 24);
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cmd->resp[1] = (resp[1] << 8)|(resp[2] >> 24);
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cmd->resp[2] = (resp[2] << 8)|(resp[3] >> 24);
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cmd->resp[3] = (resp[3] << 8);
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} else {
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rsp_opcode = cb710_read_port_32(slot, CB710_MMC_RESPONSE1_PORT) & 0x3F;
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cmd->resp[0] = cb710_read_port_32(slot, CB710_MMC_RESPONSE0_PORT);
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}
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wanted_opcode = (cmd->flags & MMC_RSP_OPCODE) ? cmd->opcode : 0x3F;
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if (rsp_opcode != wanted_opcode)
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cmd->error = -EILSEQ;
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}
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static int cb710_mmc_transfer_data(struct cb710_slot *slot,
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struct mmc_data *data)
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{
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int error, to;
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if (data->flags & MMC_DATA_READ)
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error = cb710_mmc_receive(slot, data);
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else
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error = cb710_mmc_send(slot, data);
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to = cb710_wait_for_event(slot, CB710_MMC_S1_DATA_TRANSFER_DONE);
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if (!error)
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error = to;
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if (!error)
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data->bytes_xfered = data->blksz * data->blocks;
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return error;
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}
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static int cb710_mmc_command(struct mmc_host *mmc, struct mmc_command *cmd)
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{
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struct cb710_slot *slot = cb710_mmc_to_slot(mmc);
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struct cb710_mmc_reader *reader = mmc_priv(mmc);
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struct mmc_data *data = cmd->data;
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u16 cb_cmd = cb710_encode_cmd_flags(reader, cmd);
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dev_dbg(cb710_slot_dev(slot), "cmd request: 0x%04X\n", cb_cmd);
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if (data) {
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if (!cb710_is_transfer_size_supported(data)) {
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data->error = -EINVAL;
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return -1;
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}
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|
cb710_mmc_set_transfer_size(slot, data->blocks, data->blksz);
|
|
}
|
|
|
|
cb710_wait_while_busy(slot, CB710_MMC_S2_BUSY_20|CB710_MMC_S2_BUSY_10);
|
|
cb710_write_port_16(slot, CB710_MMC_CMD_TYPE_PORT, cb_cmd);
|
|
cb710_wait_while_busy(slot, CB710_MMC_S2_BUSY_20);
|
|
cb710_write_port_32(slot, CB710_MMC_CMD_PARAM_PORT, cmd->arg);
|
|
cb710_mmc_reset_events(slot);
|
|
cb710_wait_while_busy(slot, CB710_MMC_S2_BUSY_20);
|
|
cb710_modify_port_8(slot, CB710_MMC_CONFIG0_PORT, 0x01, 0);
|
|
|
|
cmd->error = cb710_wait_for_event(slot, CB710_MMC_S1_COMMAND_SENT);
|
|
if (cmd->error)
|
|
return -1;
|
|
|
|
if (cmd->flags & MMC_RSP_PRESENT) {
|
|
cb710_receive_response(slot, cmd);
|
|
if (cmd->error)
|
|
return -1;
|
|
}
|
|
|
|
if (data)
|
|
data->error = cb710_mmc_transfer_data(slot, data);
|
|
return 0;
|
|
}
|
|
|
|
static void cb710_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
|
|
{
|
|
struct cb710_slot *slot = cb710_mmc_to_slot(mmc);
|
|
struct cb710_mmc_reader *reader = mmc_priv(mmc);
|
|
|
|
WARN_ON(reader->mrq != NULL);
|
|
|
|
reader->mrq = mrq;
|
|
cb710_mmc_enable_irq(slot, CB710_MMC_IE_TEST_MASK, 0);
|
|
|
|
if (cb710_mmc_is_card_inserted(slot)) {
|
|
if (!cb710_mmc_command(mmc, mrq->cmd) && mrq->stop)
|
|
cb710_mmc_command(mmc, mrq->stop);
|
|
mdelay(1);
|
|
} else {
|
|
mrq->cmd->error = -ENOMEDIUM;
|
|
}
|
|
|
|
tasklet_schedule(&reader->finish_req_tasklet);
|
|
}
|
|
|
|
static int cb710_mmc_powerup(struct cb710_slot *slot)
|
|
{
|
|
#ifdef CONFIG_CB710_DEBUG
|
|
struct cb710_chip *chip = cb710_slot_to_chip(slot);
|
|
#endif
|
|
int err;
|
|
|
|
/* a lot of magic; see comment in cb710_mmc_set_clock() */
|
|
dev_dbg(cb710_slot_dev(slot), "bus powerup\n");
|
|
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
|
err = cb710_wait_while_busy(slot, CB710_MMC_S2_BUSY_20);
|
|
if (unlikely(err))
|
|
return err;
|
|
cb710_modify_port_8(slot, CB710_MMC_CONFIG1_PORT, 0x80, 0);
|
|
cb710_modify_port_8(slot, CB710_MMC_CONFIG3_PORT, 0x80, 0);
|
|
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
|
mdelay(1);
|
|
dev_dbg(cb710_slot_dev(slot), "after delay 1\n");
|
|
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
|
err = cb710_wait_while_busy(slot, CB710_MMC_S2_BUSY_20);
|
|
if (unlikely(err))
|
|
return err;
|
|
cb710_modify_port_8(slot, CB710_MMC_CONFIG1_PORT, 0x09, 0);
|
|
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
|
mdelay(1);
|
|
dev_dbg(cb710_slot_dev(slot), "after delay 2\n");
|
|
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
|
err = cb710_wait_while_busy(slot, CB710_MMC_S2_BUSY_20);
|
|
if (unlikely(err))
|
|
return err;
|
|
cb710_modify_port_8(slot, CB710_MMC_CONFIG1_PORT, 0, 0x08);
|
|
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
|
mdelay(2);
|
|
dev_dbg(cb710_slot_dev(slot), "after delay 3\n");
|
|
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
|
cb710_modify_port_8(slot, CB710_MMC_CONFIG0_PORT, 0x06, 0);
|
|
cb710_modify_port_8(slot, CB710_MMC_CONFIG1_PORT, 0x70, 0);
|
|
cb710_modify_port_8(slot, CB710_MMC_CONFIG2_PORT, 0x80, 0);
|
|
cb710_modify_port_8(slot, CB710_MMC_CONFIG3_PORT, 0x03, 0);
|
|
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
|
err = cb710_wait_while_busy(slot, CB710_MMC_S2_BUSY_20);
|
|
if (unlikely(err))
|
|
return err;
|
|
/* This port behaves weird: quick byte reads of 0x08,0x09 return
|
|
* 0xFF,0x00 after writing 0xFFFF to 0x08; it works correctly when
|
|
* read/written from userspace... What am I missing here?
|
|
* (it doesn't depend on write-to-read delay) */
|
|
cb710_write_port_16(slot, CB710_MMC_CONFIGB_PORT, 0xFFFF);
|
|
cb710_modify_port_8(slot, CB710_MMC_CONFIG0_PORT, 0x06, 0);
|
|
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
|
dev_dbg(cb710_slot_dev(slot), "bus powerup finished\n");
|
|
|
|
return cb710_check_event(slot, 0);
|
|
}
|
|
|
|
static void cb710_mmc_powerdown(struct cb710_slot *slot)
|
|
{
|
|
cb710_modify_port_8(slot, CB710_MMC_CONFIG1_PORT, 0, 0x81);
|
|
cb710_modify_port_8(slot, CB710_MMC_CONFIG3_PORT, 0, 0x80);
|
|
}
|
|
|
|
static void cb710_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
|
|
{
|
|
struct cb710_slot *slot = cb710_mmc_to_slot(mmc);
|
|
struct cb710_mmc_reader *reader = mmc_priv(mmc);
|
|
int err;
|
|
|
|
cb710_mmc_set_clock(mmc, ios->clock);
|
|
|
|
if (!cb710_mmc_is_card_inserted(slot)) {
|
|
dev_dbg(cb710_slot_dev(slot),
|
|
"no card inserted - ignoring bus powerup request\n");
|
|
ios->power_mode = MMC_POWER_OFF;
|
|
}
|
|
|
|
if (ios->power_mode != reader->last_power_mode)
|
|
switch (ios->power_mode) {
|
|
case MMC_POWER_ON:
|
|
err = cb710_mmc_powerup(slot);
|
|
if (err) {
|
|
dev_warn(cb710_slot_dev(slot),
|
|
"powerup failed (%d)- retrying\n", err);
|
|
cb710_mmc_powerdown(slot);
|
|
udelay(1);
|
|
err = cb710_mmc_powerup(slot);
|
|
if (err)
|
|
dev_warn(cb710_slot_dev(slot),
|
|
"powerup retry failed (%d) - expect errors\n",
|
|
err);
|
|
}
|
|
reader->last_power_mode = MMC_POWER_ON;
|
|
break;
|
|
case MMC_POWER_OFF:
|
|
cb710_mmc_powerdown(slot);
|
|
reader->last_power_mode = MMC_POWER_OFF;
|
|
break;
|
|
case MMC_POWER_UP:
|
|
default:
|
|
/* ignore */;
|
|
}
|
|
|
|
cb710_mmc_enable_4bit_data(slot, ios->bus_width != MMC_BUS_WIDTH_1);
|
|
|
|
cb710_mmc_enable_irq(slot, CB710_MMC_IE_TEST_MASK, 0);
|
|
}
|
|
|
|
static int cb710_mmc_get_ro(struct mmc_host *mmc)
|
|
{
|
|
struct cb710_slot *slot = cb710_mmc_to_slot(mmc);
|
|
|
|
return cb710_read_port_8(slot, CB710_MMC_STATUS3_PORT)
|
|
& CB710_MMC_S3_WRITE_PROTECTED;
|
|
}
|
|
|
|
static int cb710_mmc_irq_handler(struct cb710_slot *slot)
|
|
{
|
|
struct mmc_host *mmc = cb710_slot_to_mmc(slot);
|
|
struct cb710_mmc_reader *reader = mmc_priv(mmc);
|
|
u32 status, config1, config2, irqen;
|
|
|
|
status = cb710_read_port_32(slot, CB710_MMC_STATUS_PORT);
|
|
irqen = cb710_read_port_32(slot, CB710_MMC_IRQ_ENABLE_PORT);
|
|
config2 = cb710_read_port_32(slot, CB710_MMC_CONFIGB_PORT);
|
|
config1 = cb710_read_port_32(slot, CB710_MMC_CONFIG_PORT);
|
|
|
|
dev_dbg(cb710_slot_dev(slot), "interrupt; status: %08X, "
|
|
"ie: %08X, c2: %08X, c1: %08X\n",
|
|
status, irqen, config2, config1);
|
|
|
|
if (status & (CB710_MMC_S1_CARD_CHANGED << 8)) {
|
|
/* ack the event */
|
|
cb710_write_port_8(slot, CB710_MMC_STATUS1_PORT,
|
|
CB710_MMC_S1_CARD_CHANGED);
|
|
if ((irqen & CB710_MMC_IE_CISTATUS_MASK)
|
|
== CB710_MMC_IE_CISTATUS_MASK)
|
|
mmc_detect_change(mmc, HZ/5);
|
|
} else {
|
|
dev_dbg(cb710_slot_dev(slot), "unknown interrupt (test)\n");
|
|
spin_lock(&reader->irq_lock);
|
|
__cb710_mmc_enable_irq(slot, 0, CB710_MMC_IE_TEST_MASK);
|
|
spin_unlock(&reader->irq_lock);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void cb710_mmc_finish_request_tasklet(unsigned long data)
|
|
{
|
|
struct mmc_host *mmc = (void *)data;
|
|
struct cb710_mmc_reader *reader = mmc_priv(mmc);
|
|
struct mmc_request *mrq = reader->mrq;
|
|
|
|
reader->mrq = NULL;
|
|
mmc_request_done(mmc, mrq);
|
|
}
|
|
|
|
static const struct mmc_host_ops cb710_mmc_host = {
|
|
.request = cb710_mmc_request,
|
|
.set_ios = cb710_mmc_set_ios,
|
|
.get_ro = cb710_mmc_get_ro
|
|
};
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
static int cb710_mmc_suspend(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
struct cb710_slot *slot = cb710_pdev_to_slot(pdev);
|
|
struct mmc_host *mmc = cb710_slot_to_mmc(slot);
|
|
int err;
|
|
|
|
err = mmc_suspend_host(mmc, state);
|
|
if (err)
|
|
return err;
|
|
|
|
cb710_mmc_enable_irq(slot, 0, ~0);
|
|
return 0;
|
|
}
|
|
|
|
static int cb710_mmc_resume(struct platform_device *pdev)
|
|
{
|
|
struct cb710_slot *slot = cb710_pdev_to_slot(pdev);
|
|
struct mmc_host *mmc = cb710_slot_to_mmc(slot);
|
|
|
|
cb710_mmc_enable_irq(slot, 0, ~0);
|
|
|
|
return mmc_resume_host(mmc);
|
|
}
|
|
|
|
#endif /* CONFIG_PM */
|
|
|
|
static int __devinit cb710_mmc_init(struct platform_device *pdev)
|
|
{
|
|
struct cb710_slot *slot = cb710_pdev_to_slot(pdev);
|
|
struct cb710_chip *chip = cb710_slot_to_chip(slot);
|
|
struct mmc_host *mmc;
|
|
struct cb710_mmc_reader *reader;
|
|
int err;
|
|
u32 val;
|
|
|
|
mmc = mmc_alloc_host(sizeof(*reader), cb710_slot_dev(slot));
|
|
if (!mmc)
|
|
return -ENOMEM;
|
|
|
|
dev_set_drvdata(&pdev->dev, mmc);
|
|
|
|
/* harmless (maybe) magic */
|
|
pci_read_config_dword(chip->pdev, 0x48, &val);
|
|
val = cb710_src_freq_mhz[(val >> 16) & 0xF];
|
|
dev_dbg(cb710_slot_dev(slot), "source frequency: %dMHz\n", val);
|
|
val *= 1000000;
|
|
|
|
mmc->ops = &cb710_mmc_host;
|
|
mmc->f_max = val;
|
|
mmc->f_min = val >> cb710_clock_divider_log2[CB710_MAX_DIVIDER_IDX];
|
|
mmc->ocr_avail = MMC_VDD_32_33|MMC_VDD_33_34;
|
|
mmc->caps = MMC_CAP_4_BIT_DATA;
|
|
|
|
reader = mmc_priv(mmc);
|
|
|
|
tasklet_init(&reader->finish_req_tasklet,
|
|
cb710_mmc_finish_request_tasklet, (unsigned long)mmc);
|
|
spin_lock_init(&reader->irq_lock);
|
|
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
|
|
|
cb710_mmc_enable_irq(slot, 0, ~0);
|
|
cb710_set_irq_handler(slot, cb710_mmc_irq_handler);
|
|
|
|
err = mmc_add_host(mmc);
|
|
if (unlikely(err))
|
|
goto err_free_mmc;
|
|
|
|
dev_dbg(cb710_slot_dev(slot), "mmc_hostname is %s\n",
|
|
mmc_hostname(mmc));
|
|
|
|
cb710_mmc_enable_irq(slot, CB710_MMC_IE_CARD_INSERTION_STATUS, 0);
|
|
|
|
return 0;
|
|
|
|
err_free_mmc:
|
|
dev_dbg(cb710_slot_dev(slot), "mmc_add_host() failed: %d\n", err);
|
|
|
|
mmc_free_host(mmc);
|
|
return err;
|
|
}
|
|
|
|
static int __devexit cb710_mmc_exit(struct platform_device *pdev)
|
|
{
|
|
struct cb710_slot *slot = cb710_pdev_to_slot(pdev);
|
|
struct mmc_host *mmc = cb710_slot_to_mmc(slot);
|
|
struct cb710_mmc_reader *reader = mmc_priv(mmc);
|
|
|
|
cb710_mmc_enable_irq(slot, 0, CB710_MMC_IE_CARD_INSERTION_STATUS);
|
|
|
|
mmc_remove_host(mmc);
|
|
|
|
/* IRQs should be disabled now, but let's stay on the safe side */
|
|
cb710_mmc_enable_irq(slot, 0, ~0);
|
|
cb710_set_irq_handler(slot, NULL);
|
|
|
|
/* clear config ports - just in case */
|
|
cb710_write_port_32(slot, CB710_MMC_CONFIG_PORT, 0);
|
|
cb710_write_port_16(slot, CB710_MMC_CONFIGB_PORT, 0);
|
|
|
|
tasklet_kill(&reader->finish_req_tasklet);
|
|
|
|
mmc_free_host(mmc);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver cb710_mmc_driver = {
|
|
.driver.name = "cb710-mmc",
|
|
.probe = cb710_mmc_init,
|
|
.remove = __devexit_p(cb710_mmc_exit),
|
|
#ifdef CONFIG_PM
|
|
.suspend = cb710_mmc_suspend,
|
|
.resume = cb710_mmc_resume,
|
|
#endif
|
|
};
|
|
|
|
static int __init cb710_mmc_init_module(void)
|
|
{
|
|
return platform_driver_register(&cb710_mmc_driver);
|
|
}
|
|
|
|
static void __exit cb710_mmc_cleanup_module(void)
|
|
{
|
|
platform_driver_unregister(&cb710_mmc_driver);
|
|
}
|
|
|
|
module_init(cb710_mmc_init_module);
|
|
module_exit(cb710_mmc_cleanup_module);
|
|
|
|
MODULE_AUTHOR("Michał Mirosław <mirq-linux@rere.qmqm.pl>");
|
|
MODULE_DESCRIPTION("ENE CB710 memory card reader driver - MMC/SD part");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:cb710-mmc");
|