934 lines
25 KiB
C
934 lines
25 KiB
C
/*
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* tifm_sd.c - TI FlashMedia driver
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*
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* Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
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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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*/
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#include <linux/tifm.h>
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#include <linux/mmc/protocol.h>
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#include <linux/mmc/host.h>
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#include <linux/highmem.h>
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#define DRIVER_NAME "tifm_sd"
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#define DRIVER_VERSION "0.6"
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static int no_dma = 0;
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static int fixed_timeout = 0;
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module_param(no_dma, bool, 0644);
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module_param(fixed_timeout, bool, 0644);
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/* Constants here are mostly from OMAP5912 datasheet */
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#define TIFM_MMCSD_RESET 0x0002
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#define TIFM_MMCSD_CLKMASK 0x03ff
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#define TIFM_MMCSD_POWER 0x0800
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#define TIFM_MMCSD_4BBUS 0x8000
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#define TIFM_MMCSD_RXDE 0x8000 /* rx dma enable */
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#define TIFM_MMCSD_TXDE 0x0080 /* tx dma enable */
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#define TIFM_MMCSD_BUFINT 0x0c00 /* set bits: AE, AF */
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#define TIFM_MMCSD_DPE 0x0020 /* data timeout counted in kilocycles */
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#define TIFM_MMCSD_INAB 0x0080 /* abort / initialize command */
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#define TIFM_MMCSD_READ 0x8000
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#define TIFM_MMCSD_DATAMASK 0x001d /* set bits: EOFB, BRS, CB, EOC */
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#define TIFM_MMCSD_ERRMASK 0x41e0 /* set bits: CERR, CCRC, CTO, DCRC, DTO */
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#define TIFM_MMCSD_EOC 0x0001 /* end of command phase */
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#define TIFM_MMCSD_CB 0x0004 /* card enter busy state */
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#define TIFM_MMCSD_BRS 0x0008 /* block received/sent */
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#define TIFM_MMCSD_EOFB 0x0010 /* card exit busy state */
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#define TIFM_MMCSD_DTO 0x0020 /* data time-out */
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#define TIFM_MMCSD_DCRC 0x0040 /* data crc error */
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#define TIFM_MMCSD_CTO 0x0080 /* command time-out */
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#define TIFM_MMCSD_CCRC 0x0100 /* command crc error */
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#define TIFM_MMCSD_AF 0x0400 /* fifo almost full */
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#define TIFM_MMCSD_AE 0x0800 /* fifo almost empty */
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#define TIFM_MMCSD_CERR 0x4000 /* card status error */
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#define TIFM_MMCSD_FIFO_SIZE 0x0020
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#define TIFM_MMCSD_RSP_R0 0x0000
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#define TIFM_MMCSD_RSP_R1 0x0100
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#define TIFM_MMCSD_RSP_R2 0x0200
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#define TIFM_MMCSD_RSP_R3 0x0300
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#define TIFM_MMCSD_RSP_R4 0x0400
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#define TIFM_MMCSD_RSP_R5 0x0500
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#define TIFM_MMCSD_RSP_R6 0x0600
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#define TIFM_MMCSD_RSP_BUSY 0x0800
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#define TIFM_MMCSD_CMD_BC 0x0000
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#define TIFM_MMCSD_CMD_BCR 0x1000
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#define TIFM_MMCSD_CMD_AC 0x2000
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#define TIFM_MMCSD_CMD_ADTC 0x3000
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typedef enum {
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IDLE = 0,
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CMD, /* main command ended */
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BRS, /* block transfer finished */
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SCMD, /* stop command ended */
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CARD, /* card left busy state */
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FIFO, /* FIFO operation completed (uncertain) */
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READY
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} card_state_t;
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enum {
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FIFO_RDY = 0x0001, /* hardware dependent value */
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HOST_REG = 0x0002,
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EJECT = 0x0004,
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EJECT_DONE = 0x0008,
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CARD_BUSY = 0x0010,
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OPENDRAIN = 0x0040, /* hardware dependent value */
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CARD_EVENT = 0x0100, /* hardware dependent value */
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CARD_RO = 0x0200, /* hardware dependent value */
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FIFO_EVENT = 0x10000 }; /* hardware dependent value */
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struct tifm_sd {
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struct tifm_dev *dev;
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unsigned int flags;
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card_state_t state;
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unsigned int clk_freq;
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unsigned int clk_div;
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unsigned long timeout_jiffies; // software timeout - 2 sec
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struct mmc_request *req;
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struct work_struct cmd_handler;
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struct work_struct abort_handler;
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wait_queue_head_t can_eject;
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size_t written_blocks;
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char *buffer;
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size_t buffer_size;
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size_t buffer_pos;
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};
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static int tifm_sd_transfer_data(struct tifm_dev *sock, struct tifm_sd *host,
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unsigned int host_status)
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{
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struct mmc_command *cmd = host->req->cmd;
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unsigned int t_val = 0, cnt = 0;
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if (host_status & TIFM_MMCSD_BRS) {
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/* in non-dma rx mode BRS fires when fifo is still not empty */
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if (host->buffer && (cmd->data->flags & MMC_DATA_READ)) {
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while (host->buffer_size > host->buffer_pos) {
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t_val = readl(sock->addr + SOCK_MMCSD_DATA);
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host->buffer[host->buffer_pos++] = t_val & 0xff;
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host->buffer[host->buffer_pos++] =
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(t_val >> 8) & 0xff;
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}
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}
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return 1;
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} else if (host->buffer) {
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if ((cmd->data->flags & MMC_DATA_READ) &&
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(host_status & TIFM_MMCSD_AF)) {
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for (cnt = 0; cnt < TIFM_MMCSD_FIFO_SIZE; cnt++) {
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t_val = readl(sock->addr + SOCK_MMCSD_DATA);
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if (host->buffer_size > host->buffer_pos) {
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host->buffer[host->buffer_pos++] =
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t_val & 0xff;
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host->buffer[host->buffer_pos++] =
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(t_val >> 8) & 0xff;
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}
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}
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} else if ((cmd->data->flags & MMC_DATA_WRITE)
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&& (host_status & TIFM_MMCSD_AE)) {
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for (cnt = 0; cnt < TIFM_MMCSD_FIFO_SIZE; cnt++) {
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if (host->buffer_size > host->buffer_pos) {
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t_val = host->buffer[host->buffer_pos++] & 0x00ff;
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t_val |= ((host->buffer[host->buffer_pos++]) << 8)
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& 0xff00;
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writel(t_val,
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sock->addr + SOCK_MMCSD_DATA);
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}
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}
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}
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}
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return 0;
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}
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static unsigned int tifm_sd_op_flags(struct mmc_command *cmd)
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{
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unsigned int rc = 0;
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switch (mmc_resp_type(cmd)) {
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case MMC_RSP_NONE:
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rc |= TIFM_MMCSD_RSP_R0;
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break;
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case MMC_RSP_R1B:
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rc |= TIFM_MMCSD_RSP_BUSY; // deliberate fall-through
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case MMC_RSP_R1:
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rc |= TIFM_MMCSD_RSP_R1;
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break;
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case MMC_RSP_R2:
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rc |= TIFM_MMCSD_RSP_R2;
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break;
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case MMC_RSP_R3:
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rc |= TIFM_MMCSD_RSP_R3;
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break;
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case MMC_RSP_R6:
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rc |= TIFM_MMCSD_RSP_R6;
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break;
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default:
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BUG();
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}
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switch (mmc_cmd_type(cmd)) {
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case MMC_CMD_BC:
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rc |= TIFM_MMCSD_CMD_BC;
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break;
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case MMC_CMD_BCR:
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rc |= TIFM_MMCSD_CMD_BCR;
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break;
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case MMC_CMD_AC:
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rc |= TIFM_MMCSD_CMD_AC;
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break;
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case MMC_CMD_ADTC:
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rc |= TIFM_MMCSD_CMD_ADTC;
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break;
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default:
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BUG();
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}
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return rc;
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}
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static void tifm_sd_exec(struct tifm_sd *host, struct mmc_command *cmd)
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{
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struct tifm_dev *sock = host->dev;
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unsigned int cmd_mask = tifm_sd_op_flags(cmd) |
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(host->flags & OPENDRAIN);
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if (cmd->data && (cmd->data->flags & MMC_DATA_READ))
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cmd_mask |= TIFM_MMCSD_READ;
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dev_dbg(&sock->dev, "executing opcode 0x%x, arg: 0x%x, mask: 0x%x\n",
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cmd->opcode, cmd->arg, cmd_mask);
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writel((cmd->arg >> 16) & 0xffff, sock->addr + SOCK_MMCSD_ARG_HIGH);
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writel(cmd->arg & 0xffff, sock->addr + SOCK_MMCSD_ARG_LOW);
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writel(cmd->opcode | cmd_mask, sock->addr + SOCK_MMCSD_COMMAND);
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}
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static void tifm_sd_fetch_resp(struct mmc_command *cmd, struct tifm_dev *sock)
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{
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cmd->resp[0] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x1c) << 16)
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| readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x18);
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cmd->resp[1] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x14) << 16)
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| readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x10);
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cmd->resp[2] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x0c) << 16)
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| readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x08);
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cmd->resp[3] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x04) << 16)
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| readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x00);
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}
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static void tifm_sd_process_cmd(struct tifm_dev *sock, struct tifm_sd *host,
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unsigned int host_status)
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{
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struct mmc_command *cmd = host->req->cmd;
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change_state:
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switch (host->state) {
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case IDLE:
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return;
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case CMD:
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if (host_status & TIFM_MMCSD_EOC) {
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tifm_sd_fetch_resp(cmd, sock);
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if (cmd->data) {
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host->state = BRS;
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} else
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host->state = READY;
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goto change_state;
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}
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break;
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case BRS:
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if (tifm_sd_transfer_data(sock, host, host_status)) {
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if (!host->req->stop) {
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if (cmd->data->flags & MMC_DATA_WRITE) {
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host->state = CARD;
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} else {
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host->state =
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host->buffer ? READY : FIFO;
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}
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goto change_state;
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}
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tifm_sd_exec(host, host->req->stop);
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host->state = SCMD;
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}
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break;
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case SCMD:
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if (host_status & TIFM_MMCSD_EOC) {
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tifm_sd_fetch_resp(host->req->stop, sock);
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if (cmd->error) {
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host->state = READY;
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} else if (cmd->data->flags & MMC_DATA_WRITE) {
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host->state = CARD;
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} else {
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host->state = host->buffer ? READY : FIFO;
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}
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goto change_state;
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}
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break;
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case CARD:
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if (!(host->flags & CARD_BUSY)
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&& (host->written_blocks == cmd->data->blocks)) {
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host->state = host->buffer ? READY : FIFO;
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goto change_state;
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}
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break;
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case FIFO:
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if (host->flags & FIFO_RDY) {
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host->state = READY;
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host->flags &= ~FIFO_RDY;
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goto change_state;
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}
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break;
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case READY:
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queue_work(sock->wq, &host->cmd_handler);
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return;
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}
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queue_delayed_work(sock->wq, &host->abort_handler,
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host->timeout_jiffies);
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}
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/* Called from interrupt handler */
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static unsigned int tifm_sd_signal_irq(struct tifm_dev *sock,
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unsigned int sock_irq_status)
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{
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struct tifm_sd *host;
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unsigned int host_status = 0, fifo_status = 0;
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int error_code = 0;
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spin_lock(&sock->lock);
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host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock));
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cancel_delayed_work(&host->abort_handler);
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if (sock_irq_status & FIFO_EVENT) {
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fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS);
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writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS);
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host->flags |= fifo_status & FIFO_RDY;
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}
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if (sock_irq_status & CARD_EVENT) {
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host_status = readl(sock->addr + SOCK_MMCSD_STATUS);
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writel(host_status, sock->addr + SOCK_MMCSD_STATUS);
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if (!(host->flags & HOST_REG))
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queue_work(sock->wq, &host->cmd_handler);
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if (!host->req)
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goto done;
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if (host_status & TIFM_MMCSD_ERRMASK) {
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if (host_status & TIFM_MMCSD_CERR)
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error_code = MMC_ERR_FAILED;
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else if (host_status &
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(TIFM_MMCSD_CTO | TIFM_MMCSD_DTO))
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error_code = MMC_ERR_TIMEOUT;
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else if (host_status &
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(TIFM_MMCSD_CCRC | TIFM_MMCSD_DCRC))
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error_code = MMC_ERR_BADCRC;
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writel(TIFM_FIFO_INT_SETALL,
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sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
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writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
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if (host->req->stop) {
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if (host->state == SCMD) {
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host->req->stop->error = error_code;
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} else if(host->state == BRS) {
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host->req->cmd->error = error_code;
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tifm_sd_exec(host, host->req->stop);
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queue_delayed_work(sock->wq,
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&host->abort_handler,
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host->timeout_jiffies);
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host->state = SCMD;
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goto done;
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} else {
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host->req->cmd->error = error_code;
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}
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} else {
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host->req->cmd->error = error_code;
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}
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host->state = READY;
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}
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if (host_status & TIFM_MMCSD_CB)
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host->flags |= CARD_BUSY;
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if ((host_status & TIFM_MMCSD_EOFB) &&
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(host->flags & CARD_BUSY)) {
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host->written_blocks++;
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host->flags &= ~CARD_BUSY;
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}
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}
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if (host->req)
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tifm_sd_process_cmd(sock, host, host_status);
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done:
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dev_dbg(&sock->dev, "host_status %x, fifo_status %x\n",
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host_status, fifo_status);
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spin_unlock(&sock->lock);
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return sock_irq_status;
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}
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static void tifm_sd_prepare_data(struct tifm_sd *card, struct mmc_command *cmd)
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{
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struct tifm_dev *sock = card->dev;
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unsigned int dest_cnt;
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/* DMA style IO */
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writel(TIFM_FIFO_INT_SETALL,
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sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
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writel(long_log2(cmd->data->blksz) - 2,
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sock->addr + SOCK_FIFO_PAGE_SIZE);
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writel(TIFM_FIFO_ENABLE, sock->addr + SOCK_FIFO_CONTROL);
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writel(TIFM_FIFO_INTMASK, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
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dest_cnt = (cmd->data->blocks) << 8;
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writel(sg_dma_address(cmd->data->sg), sock->addr + SOCK_DMA_ADDRESS);
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writel(cmd->data->blocks - 1, sock->addr + SOCK_MMCSD_NUM_BLOCKS);
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writel(cmd->data->blksz - 1, sock->addr + SOCK_MMCSD_BLOCK_LEN);
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if (cmd->data->flags & MMC_DATA_WRITE) {
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writel(TIFM_MMCSD_TXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
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writel(dest_cnt | TIFM_DMA_TX | TIFM_DMA_EN,
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sock->addr + SOCK_DMA_CONTROL);
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} else {
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writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
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writel(dest_cnt | TIFM_DMA_EN, sock->addr + SOCK_DMA_CONTROL);
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}
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}
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|
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static void tifm_sd_set_data_timeout(struct tifm_sd *host,
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struct mmc_data *data)
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{
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struct tifm_dev *sock = host->dev;
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unsigned int data_timeout = data->timeout_clks;
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if (fixed_timeout)
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return;
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|
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data_timeout += data->timeout_ns /
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((1000000000 / host->clk_freq) * host->clk_div);
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data_timeout *= 10; // call it fudge factor for now
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|
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if (data_timeout < 0xffff) {
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writel((~TIFM_MMCSD_DPE) &
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readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG),
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sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG);
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writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO);
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} else {
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writel(TIFM_MMCSD_DPE |
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readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG),
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sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG);
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data_timeout = (data_timeout >> 10) + 1;
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if(data_timeout > 0xffff)
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data_timeout = 0; /* set to unlimited */
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writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO);
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}
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}
|
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|
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static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq)
|
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{
|
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struct tifm_sd *host = mmc_priv(mmc);
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struct tifm_dev *sock = host->dev;
|
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unsigned long flags;
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int sg_count = 0;
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struct mmc_data *r_data = mrq->cmd->data;
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|
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spin_lock_irqsave(&sock->lock, flags);
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if (host->flags & EJECT) {
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spin_unlock_irqrestore(&sock->lock, flags);
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goto err_out;
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}
|
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|
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if (host->req) {
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printk(KERN_ERR DRIVER_NAME ": unfinished request detected\n");
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spin_unlock_irqrestore(&sock->lock, flags);
|
|
goto err_out;
|
|
}
|
|
|
|
if (r_data) {
|
|
tifm_sd_set_data_timeout(host, r_data);
|
|
|
|
sg_count = tifm_map_sg(sock, r_data->sg, r_data->sg_len,
|
|
mrq->cmd->flags & MMC_DATA_WRITE
|
|
? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
|
|
if (sg_count != 1) {
|
|
printk(KERN_ERR DRIVER_NAME
|
|
": scatterlist map failed\n");
|
|
spin_unlock_irqrestore(&sock->lock, flags);
|
|
goto err_out;
|
|
}
|
|
|
|
host->written_blocks = 0;
|
|
host->flags &= ~CARD_BUSY;
|
|
tifm_sd_prepare_data(host, mrq->cmd);
|
|
}
|
|
|
|
host->req = mrq;
|
|
host->state = CMD;
|
|
queue_delayed_work(sock->wq, &host->abort_handler,
|
|
host->timeout_jiffies);
|
|
writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL),
|
|
sock->addr + SOCK_CONTROL);
|
|
tifm_sd_exec(host, mrq->cmd);
|
|
spin_unlock_irqrestore(&sock->lock, flags);
|
|
return;
|
|
|
|
err_out:
|
|
if (sg_count > 0)
|
|
tifm_unmap_sg(sock, r_data->sg, r_data->sg_len,
|
|
(r_data->flags & MMC_DATA_WRITE)
|
|
? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
|
|
|
|
mrq->cmd->error = MMC_ERR_TIMEOUT;
|
|
mmc_request_done(mmc, mrq);
|
|
}
|
|
|
|
static void tifm_sd_end_cmd(void *data)
|
|
{
|
|
struct tifm_sd *host = data;
|
|
struct tifm_dev *sock = host->dev;
|
|
struct mmc_host *mmc = tifm_get_drvdata(sock);
|
|
struct mmc_request *mrq;
|
|
struct mmc_data *r_data = 0;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&sock->lock, flags);
|
|
|
|
mrq = host->req;
|
|
host->req = 0;
|
|
host->state = IDLE;
|
|
|
|
if (!mrq) {
|
|
printk(KERN_ERR DRIVER_NAME ": no request to complete?\n");
|
|
spin_unlock_irqrestore(&sock->lock, flags);
|
|
return;
|
|
}
|
|
|
|
r_data = mrq->cmd->data;
|
|
if (r_data) {
|
|
if (r_data->flags & MMC_DATA_WRITE) {
|
|
r_data->bytes_xfered = host->written_blocks *
|
|
r_data->blksz;
|
|
} else {
|
|
r_data->bytes_xfered = r_data->blocks -
|
|
readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1;
|
|
r_data->bytes_xfered *= r_data->blksz;
|
|
r_data->bytes_xfered += r_data->blksz -
|
|
readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1;
|
|
}
|
|
tifm_unmap_sg(sock, r_data->sg, r_data->sg_len,
|
|
(r_data->flags & MMC_DATA_WRITE)
|
|
? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
|
|
}
|
|
|
|
writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL),
|
|
sock->addr + SOCK_CONTROL);
|
|
|
|
spin_unlock_irqrestore(&sock->lock, flags);
|
|
mmc_request_done(mmc, mrq);
|
|
}
|
|
|
|
static void tifm_sd_request_nodma(struct mmc_host *mmc, struct mmc_request *mrq)
|
|
{
|
|
struct tifm_sd *host = mmc_priv(mmc);
|
|
struct tifm_dev *sock = host->dev;
|
|
unsigned long flags;
|
|
struct mmc_data *r_data = mrq->cmd->data;
|
|
char *t_buffer = 0;
|
|
|
|
if (r_data) {
|
|
t_buffer = kmap(r_data->sg->page);
|
|
if (!t_buffer) {
|
|
printk(KERN_ERR DRIVER_NAME ": kmap failed\n");
|
|
goto err_out;
|
|
}
|
|
}
|
|
|
|
spin_lock_irqsave(&sock->lock, flags);
|
|
if (host->flags & EJECT) {
|
|
spin_unlock_irqrestore(&sock->lock, flags);
|
|
goto err_out;
|
|
}
|
|
|
|
if (host->req) {
|
|
printk(KERN_ERR DRIVER_NAME ": unfinished request detected\n");
|
|
spin_unlock_irqrestore(&sock->lock, flags);
|
|
goto err_out;
|
|
}
|
|
|
|
if (r_data) {
|
|
tifm_sd_set_data_timeout(host, r_data);
|
|
|
|
host->buffer = t_buffer + r_data->sg->offset;
|
|
host->buffer_size = mrq->cmd->data->blocks *
|
|
mrq->cmd->data->blksz;
|
|
|
|
writel(TIFM_MMCSD_BUFINT |
|
|
readl(sock->addr + SOCK_MMCSD_INT_ENABLE),
|
|
sock->addr + SOCK_MMCSD_INT_ENABLE);
|
|
writel(((TIFM_MMCSD_FIFO_SIZE - 1) << 8) |
|
|
(TIFM_MMCSD_FIFO_SIZE - 1),
|
|
sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
|
|
|
|
host->written_blocks = 0;
|
|
host->flags &= ~CARD_BUSY;
|
|
host->buffer_pos = 0;
|
|
writel(r_data->blocks - 1, sock->addr + SOCK_MMCSD_NUM_BLOCKS);
|
|
writel(r_data->blksz - 1, sock->addr + SOCK_MMCSD_BLOCK_LEN);
|
|
}
|
|
|
|
host->req = mrq;
|
|
host->state = CMD;
|
|
queue_delayed_work(sock->wq, &host->abort_handler,
|
|
host->timeout_jiffies);
|
|
writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL),
|
|
sock->addr + SOCK_CONTROL);
|
|
tifm_sd_exec(host, mrq->cmd);
|
|
spin_unlock_irqrestore(&sock->lock, flags);
|
|
return;
|
|
|
|
err_out:
|
|
if (t_buffer)
|
|
kunmap(r_data->sg->page);
|
|
|
|
mrq->cmd->error = MMC_ERR_TIMEOUT;
|
|
mmc_request_done(mmc, mrq);
|
|
}
|
|
|
|
static void tifm_sd_end_cmd_nodma(void *data)
|
|
{
|
|
struct tifm_sd *host = (struct tifm_sd*)data;
|
|
struct tifm_dev *sock = host->dev;
|
|
struct mmc_host *mmc = tifm_get_drvdata(sock);
|
|
struct mmc_request *mrq;
|
|
struct mmc_data *r_data = 0;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&sock->lock, flags);
|
|
|
|
mrq = host->req;
|
|
host->req = 0;
|
|
host->state = IDLE;
|
|
|
|
if (!mrq) {
|
|
printk(KERN_ERR DRIVER_NAME ": no request to complete?\n");
|
|
spin_unlock_irqrestore(&sock->lock, flags);
|
|
return;
|
|
}
|
|
|
|
r_data = mrq->cmd->data;
|
|
if (r_data) {
|
|
writel((~TIFM_MMCSD_BUFINT) &
|
|
readl(sock->addr + SOCK_MMCSD_INT_ENABLE),
|
|
sock->addr + SOCK_MMCSD_INT_ENABLE);
|
|
|
|
if (r_data->flags & MMC_DATA_WRITE) {
|
|
r_data->bytes_xfered = host->written_blocks *
|
|
r_data->blksz;
|
|
} else {
|
|
r_data->bytes_xfered = r_data->blocks -
|
|
readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1;
|
|
r_data->bytes_xfered *= r_data->blksz;
|
|
r_data->bytes_xfered += r_data->blksz -
|
|
readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1;
|
|
}
|
|
host->buffer = 0;
|
|
host->buffer_pos = 0;
|
|
host->buffer_size = 0;
|
|
}
|
|
|
|
writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL),
|
|
sock->addr + SOCK_CONTROL);
|
|
|
|
spin_unlock_irqrestore(&sock->lock, flags);
|
|
|
|
if (r_data)
|
|
kunmap(r_data->sg->page);
|
|
|
|
mmc_request_done(mmc, mrq);
|
|
}
|
|
|
|
static void tifm_sd_abort(void *data)
|
|
{
|
|
printk(KERN_ERR DRIVER_NAME
|
|
": card failed to respond for a long period of time");
|
|
tifm_eject(((struct tifm_sd*)data)->dev);
|
|
}
|
|
|
|
static void tifm_sd_ios(struct mmc_host *mmc, struct mmc_ios *ios)
|
|
{
|
|
struct tifm_sd *host = mmc_priv(mmc);
|
|
struct tifm_dev *sock = host->dev;
|
|
unsigned int clk_div1, clk_div2;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&sock->lock, flags);
|
|
|
|
dev_dbg(&sock->dev, "Setting bus width %d, power %d\n", ios->bus_width,
|
|
ios->power_mode);
|
|
if (ios->bus_width == MMC_BUS_WIDTH_4) {
|
|
writel(TIFM_MMCSD_4BBUS | readl(sock->addr + SOCK_MMCSD_CONFIG),
|
|
sock->addr + SOCK_MMCSD_CONFIG);
|
|
} else {
|
|
writel((~TIFM_MMCSD_4BBUS) &
|
|
readl(sock->addr + SOCK_MMCSD_CONFIG),
|
|
sock->addr + SOCK_MMCSD_CONFIG);
|
|
}
|
|
|
|
if (ios->clock) {
|
|
clk_div1 = 20000000 / ios->clock;
|
|
if (!clk_div1)
|
|
clk_div1 = 1;
|
|
|
|
clk_div2 = 24000000 / ios->clock;
|
|
if (!clk_div2)
|
|
clk_div2 = 1;
|
|
|
|
if ((20000000 / clk_div1) > ios->clock)
|
|
clk_div1++;
|
|
if ((24000000 / clk_div2) > ios->clock)
|
|
clk_div2++;
|
|
if ((20000000 / clk_div1) > (24000000 / clk_div2)) {
|
|
host->clk_freq = 20000000;
|
|
host->clk_div = clk_div1;
|
|
writel((~TIFM_CTRL_FAST_CLK) &
|
|
readl(sock->addr + SOCK_CONTROL),
|
|
sock->addr + SOCK_CONTROL);
|
|
} else {
|
|
host->clk_freq = 24000000;
|
|
host->clk_div = clk_div2;
|
|
writel(TIFM_CTRL_FAST_CLK |
|
|
readl(sock->addr + SOCK_CONTROL),
|
|
sock->addr + SOCK_CONTROL);
|
|
}
|
|
} else {
|
|
host->clk_div = 0;
|
|
}
|
|
host->clk_div &= TIFM_MMCSD_CLKMASK;
|
|
writel(host->clk_div | ((~TIFM_MMCSD_CLKMASK) &
|
|
readl(sock->addr + SOCK_MMCSD_CONFIG)),
|
|
sock->addr + SOCK_MMCSD_CONFIG);
|
|
|
|
if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
|
|
host->flags |= OPENDRAIN;
|
|
else
|
|
host->flags &= ~OPENDRAIN;
|
|
|
|
/* chip_select : maybe later */
|
|
//vdd
|
|
//power is set before probe / after remove
|
|
//I believe, power_off when already marked for eject is sufficient to
|
|
// allow removal.
|
|
if ((host->flags & EJECT) && ios->power_mode == MMC_POWER_OFF) {
|
|
host->flags |= EJECT_DONE;
|
|
wake_up_all(&host->can_eject);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&sock->lock, flags);
|
|
}
|
|
|
|
static int tifm_sd_ro(struct mmc_host *mmc)
|
|
{
|
|
int rc;
|
|
struct tifm_sd *host = mmc_priv(mmc);
|
|
struct tifm_dev *sock = host->dev;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&sock->lock, flags);
|
|
|
|
host->flags |= (CARD_RO & readl(sock->addr + SOCK_PRESENT_STATE));
|
|
rc = (host->flags & CARD_RO) ? 1 : 0;
|
|
|
|
spin_unlock_irqrestore(&sock->lock, flags);
|
|
return rc;
|
|
}
|
|
|
|
static struct mmc_host_ops tifm_sd_ops = {
|
|
.request = tifm_sd_request,
|
|
.set_ios = tifm_sd_ios,
|
|
.get_ro = tifm_sd_ro
|
|
};
|
|
|
|
static void tifm_sd_register_host(void *data)
|
|
{
|
|
struct tifm_sd *host = (struct tifm_sd*)data;
|
|
struct tifm_dev *sock = host->dev;
|
|
struct mmc_host *mmc = tifm_get_drvdata(sock);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&sock->lock, flags);
|
|
host->flags |= HOST_REG;
|
|
PREPARE_WORK(&host->cmd_handler,
|
|
no_dma ? tifm_sd_end_cmd_nodma : tifm_sd_end_cmd,
|
|
data);
|
|
spin_unlock_irqrestore(&sock->lock, flags);
|
|
dev_dbg(&sock->dev, "adding host\n");
|
|
mmc_add_host(mmc);
|
|
}
|
|
|
|
static int tifm_sd_probe(struct tifm_dev *sock)
|
|
{
|
|
struct mmc_host *mmc;
|
|
struct tifm_sd *host;
|
|
int rc = -EIO;
|
|
|
|
if (!(TIFM_SOCK_STATE_OCCUPIED &
|
|
readl(sock->addr + SOCK_PRESENT_STATE))) {
|
|
printk(KERN_WARNING DRIVER_NAME ": card gone, unexpectedly\n");
|
|
return rc;
|
|
}
|
|
|
|
mmc = mmc_alloc_host(sizeof(struct tifm_sd), &sock->dev);
|
|
if (!mmc)
|
|
return -ENOMEM;
|
|
|
|
host = mmc_priv(mmc);
|
|
host->dev = sock;
|
|
host->clk_div = 61;
|
|
init_waitqueue_head(&host->can_eject);
|
|
INIT_WORK(&host->cmd_handler, tifm_sd_register_host, host);
|
|
INIT_WORK(&host->abort_handler, tifm_sd_abort, host);
|
|
|
|
tifm_set_drvdata(sock, mmc);
|
|
sock->signal_irq = tifm_sd_signal_irq;
|
|
|
|
host->clk_freq = 20000000;
|
|
host->timeout_jiffies = msecs_to_jiffies(1000);
|
|
|
|
tifm_sd_ops.request = no_dma ? tifm_sd_request_nodma : tifm_sd_request;
|
|
mmc->ops = &tifm_sd_ops;
|
|
mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
|
|
mmc->caps = MMC_CAP_4_BIT_DATA;
|
|
mmc->f_min = 20000000 / 60;
|
|
mmc->f_max = 24000000;
|
|
mmc->max_hw_segs = 1;
|
|
mmc->max_phys_segs = 1;
|
|
mmc->max_sectors = 127;
|
|
mmc->max_seg_size = mmc->max_sectors << 11; //2k maximum hw block length
|
|
|
|
writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE);
|
|
writel(TIFM_MMCSD_RESET, sock->addr + SOCK_MMCSD_SYSTEM_CONTROL);
|
|
writel(host->clk_div | TIFM_MMCSD_POWER,
|
|
sock->addr + SOCK_MMCSD_CONFIG);
|
|
|
|
for (rc = 0; rc < 50; rc++) {
|
|
/* Wait for reset ack */
|
|
if (1 & readl(sock->addr + SOCK_MMCSD_SYSTEM_STATUS)) {
|
|
rc = 0;
|
|
break;
|
|
}
|
|
msleep(10);
|
|
}
|
|
|
|
if (rc) {
|
|
printk(KERN_ERR DRIVER_NAME
|
|
": card not ready - probe failed\n");
|
|
mmc_free_host(mmc);
|
|
return -ENODEV;
|
|
}
|
|
|
|
writel(0, sock->addr + SOCK_MMCSD_NUM_BLOCKS);
|
|
writel(host->clk_div | TIFM_MMCSD_POWER,
|
|
sock->addr + SOCK_MMCSD_CONFIG);
|
|
writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
|
|
writel(TIFM_MMCSD_DATAMASK | TIFM_MMCSD_ERRMASK,
|
|
sock->addr + SOCK_MMCSD_INT_ENABLE);
|
|
|
|
writel(64, sock->addr + SOCK_MMCSD_COMMAND_TO); // command timeout 64 clocks for now
|
|
writel(TIFM_MMCSD_INAB, sock->addr + SOCK_MMCSD_COMMAND);
|
|
writel(host->clk_div | TIFM_MMCSD_POWER,
|
|
sock->addr + SOCK_MMCSD_CONFIG);
|
|
|
|
queue_delayed_work(sock->wq, &host->abort_handler,
|
|
host->timeout_jiffies);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tifm_sd_host_is_down(struct tifm_dev *sock)
|
|
{
|
|
struct mmc_host *mmc = tifm_get_drvdata(sock);
|
|
struct tifm_sd *host = mmc_priv(mmc);
|
|
unsigned long flags;
|
|
int rc = 0;
|
|
|
|
spin_lock_irqsave(&sock->lock, flags);
|
|
rc = (host->flags & EJECT_DONE);
|
|
spin_unlock_irqrestore(&sock->lock, flags);
|
|
return rc;
|
|
}
|
|
|
|
static void tifm_sd_remove(struct tifm_dev *sock)
|
|
{
|
|
struct mmc_host *mmc = tifm_get_drvdata(sock);
|
|
struct tifm_sd *host = mmc_priv(mmc);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&sock->lock, flags);
|
|
host->flags |= EJECT;
|
|
if (host->req)
|
|
queue_work(sock->wq, &host->cmd_handler);
|
|
spin_unlock_irqrestore(&sock->lock, flags);
|
|
wait_event_timeout(host->can_eject, tifm_sd_host_is_down(sock),
|
|
host->timeout_jiffies);
|
|
|
|
if (host->flags & HOST_REG)
|
|
mmc_remove_host(mmc);
|
|
|
|
/* The meaning of the bit majority in this constant is unknown. */
|
|
writel(0xfff8 & readl(sock->addr + SOCK_CONTROL),
|
|
sock->addr + SOCK_CONTROL);
|
|
writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE);
|
|
writel(TIFM_FIFO_INT_SETALL,
|
|
sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
|
|
writel(0, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
|
|
|
|
tifm_set_drvdata(sock, 0);
|
|
mmc_free_host(mmc);
|
|
}
|
|
|
|
static tifm_media_id tifm_sd_id_tbl[] = {
|
|
FM_SD, 0
|
|
};
|
|
|
|
static struct tifm_driver tifm_sd_driver = {
|
|
.driver = {
|
|
.name = DRIVER_NAME,
|
|
.owner = THIS_MODULE
|
|
},
|
|
.id_table = tifm_sd_id_tbl,
|
|
.probe = tifm_sd_probe,
|
|
.remove = tifm_sd_remove
|
|
};
|
|
|
|
static int __init tifm_sd_init(void)
|
|
{
|
|
return tifm_register_driver(&tifm_sd_driver);
|
|
}
|
|
|
|
static void __exit tifm_sd_exit(void)
|
|
{
|
|
tifm_unregister_driver(&tifm_sd_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Alex Dubov");
|
|
MODULE_DESCRIPTION("TI FlashMedia SD driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DEVICE_TABLE(tifm, tifm_sd_id_tbl);
|
|
MODULE_VERSION(DRIVER_VERSION);
|
|
|
|
module_init(tifm_sd_init);
|
|
module_exit(tifm_sd_exit);
|