mirror of https://gitee.com/openkylin/linux.git
1062 lines
27 KiB
C
1062 lines
27 KiB
C
/*
|
|
* linux/drivers/mmc/host/tmio_mmc_pio.c
|
|
*
|
|
* Copyright (C) 2011 Guennadi Liakhovetski
|
|
* Copyright (C) 2007 Ian Molton
|
|
* Copyright (C) 2004 Ian Molton
|
|
*
|
|
* 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.
|
|
*
|
|
* Driver for the MMC / SD / SDIO IP found in:
|
|
*
|
|
* TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs
|
|
*
|
|
* This driver draws mainly on scattered spec sheets, Reverse engineering
|
|
* of the toshiba e800 SD driver and some parts of the 2.4 ASIC3 driver (4 bit
|
|
* support). (Further 4 bit support from a later datasheet).
|
|
*
|
|
* TODO:
|
|
* Investigate using a workqueue for PIO transfers
|
|
* Eliminate FIXMEs
|
|
* SDIO support
|
|
* Better Power management
|
|
* Handle MMC errors better
|
|
* double buffer support
|
|
*
|
|
*/
|
|
|
|
#include <linux/delay.h>
|
|
#include <linux/device.h>
|
|
#include <linux/highmem.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/io.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/mfd/tmio.h>
|
|
#include <linux/mmc/host.h>
|
|
#include <linux/mmc/tmio.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#include "tmio_mmc.h"
|
|
|
|
void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
|
|
{
|
|
host->sdcard_irq_mask &= ~(i & TMIO_MASK_IRQ);
|
|
sd_ctrl_write32(host, CTL_IRQ_MASK, host->sdcard_irq_mask);
|
|
}
|
|
|
|
void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
|
|
{
|
|
host->sdcard_irq_mask |= (i & TMIO_MASK_IRQ);
|
|
sd_ctrl_write32(host, CTL_IRQ_MASK, host->sdcard_irq_mask);
|
|
}
|
|
|
|
static void tmio_mmc_ack_mmc_irqs(struct tmio_mmc_host *host, u32 i)
|
|
{
|
|
sd_ctrl_write32(host, CTL_STATUS, ~i);
|
|
}
|
|
|
|
static void tmio_mmc_init_sg(struct tmio_mmc_host *host, struct mmc_data *data)
|
|
{
|
|
host->sg_len = data->sg_len;
|
|
host->sg_ptr = data->sg;
|
|
host->sg_orig = data->sg;
|
|
host->sg_off = 0;
|
|
}
|
|
|
|
static int tmio_mmc_next_sg(struct tmio_mmc_host *host)
|
|
{
|
|
host->sg_ptr = sg_next(host->sg_ptr);
|
|
host->sg_off = 0;
|
|
return --host->sg_len;
|
|
}
|
|
|
|
#ifdef CONFIG_MMC_DEBUG
|
|
|
|
#define STATUS_TO_TEXT(a, status, i) \
|
|
do { \
|
|
if (status & TMIO_STAT_##a) { \
|
|
if (i++) \
|
|
printk(" | "); \
|
|
printk(#a); \
|
|
} \
|
|
} while (0)
|
|
|
|
static void pr_debug_status(u32 status)
|
|
{
|
|
int i = 0;
|
|
pr_debug("status: %08x = ", status);
|
|
STATUS_TO_TEXT(CARD_REMOVE, status, i);
|
|
STATUS_TO_TEXT(CARD_INSERT, status, i);
|
|
STATUS_TO_TEXT(SIGSTATE, status, i);
|
|
STATUS_TO_TEXT(WRPROTECT, status, i);
|
|
STATUS_TO_TEXT(CARD_REMOVE_A, status, i);
|
|
STATUS_TO_TEXT(CARD_INSERT_A, status, i);
|
|
STATUS_TO_TEXT(SIGSTATE_A, status, i);
|
|
STATUS_TO_TEXT(CMD_IDX_ERR, status, i);
|
|
STATUS_TO_TEXT(STOPBIT_ERR, status, i);
|
|
STATUS_TO_TEXT(ILL_FUNC, status, i);
|
|
STATUS_TO_TEXT(CMD_BUSY, status, i);
|
|
STATUS_TO_TEXT(CMDRESPEND, status, i);
|
|
STATUS_TO_TEXT(DATAEND, status, i);
|
|
STATUS_TO_TEXT(CRCFAIL, status, i);
|
|
STATUS_TO_TEXT(DATATIMEOUT, status, i);
|
|
STATUS_TO_TEXT(CMDTIMEOUT, status, i);
|
|
STATUS_TO_TEXT(RXOVERFLOW, status, i);
|
|
STATUS_TO_TEXT(TXUNDERRUN, status, i);
|
|
STATUS_TO_TEXT(RXRDY, status, i);
|
|
STATUS_TO_TEXT(TXRQ, status, i);
|
|
STATUS_TO_TEXT(ILL_ACCESS, status, i);
|
|
printk("\n");
|
|
}
|
|
|
|
#else
|
|
#define pr_debug_status(s) do { } while (0)
|
|
#endif
|
|
|
|
static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
|
|
{
|
|
struct tmio_mmc_host *host = mmc_priv(mmc);
|
|
|
|
if (enable) {
|
|
host->sdio_irq_enabled = 1;
|
|
host->sdio_irq_mask = TMIO_SDIO_MASK_ALL &
|
|
~TMIO_SDIO_STAT_IOIRQ;
|
|
sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001);
|
|
sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
|
|
} else {
|
|
host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
|
|
sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
|
|
sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000);
|
|
host->sdio_irq_enabled = 0;
|
|
}
|
|
}
|
|
|
|
static void tmio_mmc_set_clock(struct tmio_mmc_host *host, int new_clock)
|
|
{
|
|
u32 clk = 0, clock;
|
|
|
|
if (new_clock) {
|
|
for (clock = host->mmc->f_min, clk = 0x80000080;
|
|
new_clock >= (clock<<1); clk >>= 1)
|
|
clock <<= 1;
|
|
clk |= 0x100;
|
|
}
|
|
|
|
if (host->set_clk_div)
|
|
host->set_clk_div(host->pdev, (clk>>22) & 1);
|
|
|
|
sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & 0x1ff);
|
|
}
|
|
|
|
static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
|
|
{
|
|
struct resource *res = platform_get_resource(host->pdev, IORESOURCE_MEM, 0);
|
|
|
|
/* implicit BUG_ON(!res) */
|
|
if (resource_size(res) > 0x100) {
|
|
sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000);
|
|
msleep(10);
|
|
}
|
|
|
|
sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~0x0100 &
|
|
sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
|
|
msleep(10);
|
|
}
|
|
|
|
static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
|
|
{
|
|
struct resource *res = platform_get_resource(host->pdev, IORESOURCE_MEM, 0);
|
|
|
|
sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, 0x0100 |
|
|
sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
|
|
msleep(10);
|
|
|
|
/* implicit BUG_ON(!res) */
|
|
if (resource_size(res) > 0x100) {
|
|
sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100);
|
|
msleep(10);
|
|
}
|
|
}
|
|
|
|
static void tmio_mmc_reset(struct tmio_mmc_host *host)
|
|
{
|
|
struct resource *res = platform_get_resource(host->pdev, IORESOURCE_MEM, 0);
|
|
|
|
/* FIXME - should we set stop clock reg here */
|
|
sd_ctrl_write16(host, CTL_RESET_SD, 0x0000);
|
|
/* implicit BUG_ON(!res) */
|
|
if (resource_size(res) > 0x100)
|
|
sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000);
|
|
msleep(10);
|
|
sd_ctrl_write16(host, CTL_RESET_SD, 0x0001);
|
|
if (resource_size(res) > 0x100)
|
|
sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001);
|
|
msleep(10);
|
|
}
|
|
|
|
static void tmio_mmc_reset_work(struct work_struct *work)
|
|
{
|
|
struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host,
|
|
delayed_reset_work.work);
|
|
struct mmc_request *mrq;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
mrq = host->mrq;
|
|
|
|
/*
|
|
* is request already finished? Since we use a non-blocking
|
|
* cancel_delayed_work(), it can happen, that a .set_ios() call preempts
|
|
* us, so, have to check for IS_ERR(host->mrq)
|
|
*/
|
|
if (IS_ERR_OR_NULL(mrq)
|
|
|| time_is_after_jiffies(host->last_req_ts +
|
|
msecs_to_jiffies(2000))) {
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
return;
|
|
}
|
|
|
|
dev_warn(&host->pdev->dev,
|
|
"timeout waiting for hardware interrupt (CMD%u)\n",
|
|
mrq->cmd->opcode);
|
|
|
|
if (host->data)
|
|
host->data->error = -ETIMEDOUT;
|
|
else if (host->cmd)
|
|
host->cmd->error = -ETIMEDOUT;
|
|
else
|
|
mrq->cmd->error = -ETIMEDOUT;
|
|
|
|
host->cmd = NULL;
|
|
host->data = NULL;
|
|
host->force_pio = false;
|
|
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
|
|
tmio_mmc_reset(host);
|
|
|
|
/* Ready for new calls */
|
|
host->mrq = NULL;
|
|
|
|
mmc_request_done(host->mmc, mrq);
|
|
}
|
|
|
|
/* called with host->lock held, interrupts disabled */
|
|
static void tmio_mmc_finish_request(struct tmio_mmc_host *host)
|
|
{
|
|
struct mmc_request *mrq;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
|
|
mrq = host->mrq;
|
|
if (IS_ERR_OR_NULL(mrq)) {
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
return;
|
|
}
|
|
|
|
host->cmd = NULL;
|
|
host->data = NULL;
|
|
host->force_pio = false;
|
|
|
|
cancel_delayed_work(&host->delayed_reset_work);
|
|
|
|
host->mrq = NULL;
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
|
|
mmc_request_done(host->mmc, mrq);
|
|
}
|
|
|
|
static void tmio_mmc_done_work(struct work_struct *work)
|
|
{
|
|
struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host,
|
|
done);
|
|
tmio_mmc_finish_request(host);
|
|
}
|
|
|
|
/* These are the bitmasks the tmio chip requires to implement the MMC response
|
|
* types. Note that R1 and R6 are the same in this scheme. */
|
|
#define APP_CMD 0x0040
|
|
#define RESP_NONE 0x0300
|
|
#define RESP_R1 0x0400
|
|
#define RESP_R1B 0x0500
|
|
#define RESP_R2 0x0600
|
|
#define RESP_R3 0x0700
|
|
#define DATA_PRESENT 0x0800
|
|
#define TRANSFER_READ 0x1000
|
|
#define TRANSFER_MULTI 0x2000
|
|
#define SECURITY_CMD 0x4000
|
|
|
|
static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd)
|
|
{
|
|
struct mmc_data *data = host->data;
|
|
int c = cmd->opcode;
|
|
|
|
/* Command 12 is handled by hardware */
|
|
if (cmd->opcode == 12 && !cmd->arg) {
|
|
sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x001);
|
|
return 0;
|
|
}
|
|
|
|
switch (mmc_resp_type(cmd)) {
|
|
case MMC_RSP_NONE: c |= RESP_NONE; break;
|
|
case MMC_RSP_R1: c |= RESP_R1; break;
|
|
case MMC_RSP_R1B: c |= RESP_R1B; break;
|
|
case MMC_RSP_R2: c |= RESP_R2; break;
|
|
case MMC_RSP_R3: c |= RESP_R3; break;
|
|
default:
|
|
pr_debug("Unknown response type %d\n", mmc_resp_type(cmd));
|
|
return -EINVAL;
|
|
}
|
|
|
|
host->cmd = cmd;
|
|
|
|
/* FIXME - this seems to be ok commented out but the spec suggest this bit
|
|
* should be set when issuing app commands.
|
|
* if(cmd->flags & MMC_FLAG_ACMD)
|
|
* c |= APP_CMD;
|
|
*/
|
|
if (data) {
|
|
c |= DATA_PRESENT;
|
|
if (data->blocks > 1) {
|
|
sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x100);
|
|
c |= TRANSFER_MULTI;
|
|
}
|
|
if (data->flags & MMC_DATA_READ)
|
|
c |= TRANSFER_READ;
|
|
}
|
|
|
|
tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_CMD);
|
|
|
|
/* Fire off the command */
|
|
sd_ctrl_write32(host, CTL_ARG_REG, cmd->arg);
|
|
sd_ctrl_write16(host, CTL_SD_CMD, c);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This chip always returns (at least?) as much data as you ask for.
|
|
* I'm unsure what happens if you ask for less than a block. This should be
|
|
* looked into to ensure that a funny length read doesn't hose the controller.
|
|
*/
|
|
static void tmio_mmc_pio_irq(struct tmio_mmc_host *host)
|
|
{
|
|
struct mmc_data *data = host->data;
|
|
void *sg_virt;
|
|
unsigned short *buf;
|
|
unsigned int count;
|
|
unsigned long flags;
|
|
|
|
if ((host->chan_tx || host->chan_rx) && !host->force_pio) {
|
|
pr_err("PIO IRQ in DMA mode!\n");
|
|
return;
|
|
} else if (!data) {
|
|
pr_debug("Spurious PIO IRQ\n");
|
|
return;
|
|
}
|
|
|
|
sg_virt = tmio_mmc_kmap_atomic(host->sg_ptr, &flags);
|
|
buf = (unsigned short *)(sg_virt + host->sg_off);
|
|
|
|
count = host->sg_ptr->length - host->sg_off;
|
|
if (count > data->blksz)
|
|
count = data->blksz;
|
|
|
|
pr_debug("count: %08x offset: %08x flags %08x\n",
|
|
count, host->sg_off, data->flags);
|
|
|
|
/* Transfer the data */
|
|
if (data->flags & MMC_DATA_READ)
|
|
sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
|
|
else
|
|
sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
|
|
|
|
host->sg_off += count;
|
|
|
|
tmio_mmc_kunmap_atomic(host->sg_ptr, &flags, sg_virt);
|
|
|
|
if (host->sg_off == host->sg_ptr->length)
|
|
tmio_mmc_next_sg(host);
|
|
|
|
return;
|
|
}
|
|
|
|
static void tmio_mmc_check_bounce_buffer(struct tmio_mmc_host *host)
|
|
{
|
|
if (host->sg_ptr == &host->bounce_sg) {
|
|
unsigned long flags;
|
|
void *sg_vaddr = tmio_mmc_kmap_atomic(host->sg_orig, &flags);
|
|
memcpy(sg_vaddr, host->bounce_buf, host->bounce_sg.length);
|
|
tmio_mmc_kunmap_atomic(host->sg_orig, &flags, sg_vaddr);
|
|
}
|
|
}
|
|
|
|
/* needs to be called with host->lock held */
|
|
void tmio_mmc_do_data_irq(struct tmio_mmc_host *host)
|
|
{
|
|
struct mmc_data *data = host->data;
|
|
struct mmc_command *stop;
|
|
|
|
host->data = NULL;
|
|
|
|
if (!data) {
|
|
dev_warn(&host->pdev->dev, "Spurious data end IRQ\n");
|
|
return;
|
|
}
|
|
stop = data->stop;
|
|
|
|
/* FIXME - return correct transfer count on errors */
|
|
if (!data->error)
|
|
data->bytes_xfered = data->blocks * data->blksz;
|
|
else
|
|
data->bytes_xfered = 0;
|
|
|
|
pr_debug("Completed data request\n");
|
|
|
|
/*
|
|
* FIXME: other drivers allow an optional stop command of any given type
|
|
* which we dont do, as the chip can auto generate them.
|
|
* Perhaps we can be smarter about when to use auto CMD12 and
|
|
* only issue the auto request when we know this is the desired
|
|
* stop command, allowing fallback to the stop command the
|
|
* upper layers expect. For now, we do what works.
|
|
*/
|
|
|
|
if (data->flags & MMC_DATA_READ) {
|
|
if (host->chan_rx && !host->force_pio)
|
|
tmio_mmc_check_bounce_buffer(host);
|
|
dev_dbg(&host->pdev->dev, "Complete Rx request %p\n",
|
|
host->mrq);
|
|
} else {
|
|
dev_dbg(&host->pdev->dev, "Complete Tx request %p\n",
|
|
host->mrq);
|
|
}
|
|
|
|
if (stop) {
|
|
if (stop->opcode == 12 && !stop->arg)
|
|
sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x000);
|
|
else
|
|
BUG();
|
|
}
|
|
|
|
schedule_work(&host->done);
|
|
}
|
|
|
|
static void tmio_mmc_data_irq(struct tmio_mmc_host *host)
|
|
{
|
|
struct mmc_data *data;
|
|
spin_lock(&host->lock);
|
|
data = host->data;
|
|
|
|
if (!data)
|
|
goto out;
|
|
|
|
if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) {
|
|
/*
|
|
* Has all data been written out yet? Testing on SuperH showed,
|
|
* that in most cases the first interrupt comes already with the
|
|
* BUSY status bit clear, but on some operations, like mount or
|
|
* in the beginning of a write / sync / umount, there is one
|
|
* DATAEND interrupt with the BUSY bit set, in this cases
|
|
* waiting for one more interrupt fixes the problem.
|
|
*/
|
|
if (!(sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_CMD_BUSY)) {
|
|
tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
|
|
tasklet_schedule(&host->dma_complete);
|
|
}
|
|
} else if (host->chan_rx && (data->flags & MMC_DATA_READ) && !host->force_pio) {
|
|
tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
|
|
tasklet_schedule(&host->dma_complete);
|
|
} else {
|
|
tmio_mmc_do_data_irq(host);
|
|
tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP | TMIO_MASK_WRITEOP);
|
|
}
|
|
out:
|
|
spin_unlock(&host->lock);
|
|
}
|
|
|
|
static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host,
|
|
unsigned int stat)
|
|
{
|
|
struct mmc_command *cmd = host->cmd;
|
|
int i, addr;
|
|
|
|
spin_lock(&host->lock);
|
|
|
|
if (!host->cmd) {
|
|
pr_debug("Spurious CMD irq\n");
|
|
goto out;
|
|
}
|
|
|
|
host->cmd = NULL;
|
|
|
|
/* This controller is sicker than the PXA one. Not only do we need to
|
|
* drop the top 8 bits of the first response word, we also need to
|
|
* modify the order of the response for short response command types.
|
|
*/
|
|
|
|
for (i = 3, addr = CTL_RESPONSE ; i >= 0 ; i--, addr += 4)
|
|
cmd->resp[i] = sd_ctrl_read32(host, addr);
|
|
|
|
if (cmd->flags & MMC_RSP_136) {
|
|
cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24);
|
|
cmd->resp[1] = (cmd->resp[1] << 8) | (cmd->resp[2] >> 24);
|
|
cmd->resp[2] = (cmd->resp[2] << 8) | (cmd->resp[3] >> 24);
|
|
cmd->resp[3] <<= 8;
|
|
} else if (cmd->flags & MMC_RSP_R3) {
|
|
cmd->resp[0] = cmd->resp[3];
|
|
}
|
|
|
|
if (stat & TMIO_STAT_CMDTIMEOUT)
|
|
cmd->error = -ETIMEDOUT;
|
|
else if (stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC)
|
|
cmd->error = -EILSEQ;
|
|
|
|
/* If there is data to handle we enable data IRQs here, and
|
|
* we will ultimatley finish the request in the data_end handler.
|
|
* If theres no data or we encountered an error, finish now.
|
|
*/
|
|
if (host->data && !cmd->error) {
|
|
if (host->data->flags & MMC_DATA_READ) {
|
|
if (host->force_pio || !host->chan_rx)
|
|
tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_READOP);
|
|
else
|
|
tasklet_schedule(&host->dma_issue);
|
|
} else {
|
|
if (host->force_pio || !host->chan_tx)
|
|
tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_WRITEOP);
|
|
else
|
|
tasklet_schedule(&host->dma_issue);
|
|
}
|
|
} else {
|
|
schedule_work(&host->done);
|
|
}
|
|
|
|
out:
|
|
spin_unlock(&host->lock);
|
|
}
|
|
|
|
static void tmio_mmc_card_irq_status(struct tmio_mmc_host *host,
|
|
int *ireg, int *status)
|
|
{
|
|
*status = sd_ctrl_read32(host, CTL_STATUS);
|
|
*ireg = *status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask;
|
|
|
|
pr_debug_status(*status);
|
|
pr_debug_status(*ireg);
|
|
}
|
|
|
|
static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host,
|
|
int ireg, int status)
|
|
{
|
|
struct mmc_host *mmc = host->mmc;
|
|
|
|
/* Card insert / remove attempts */
|
|
if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) {
|
|
tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CARD_INSERT |
|
|
TMIO_STAT_CARD_REMOVE);
|
|
if ((((ireg & TMIO_STAT_CARD_REMOVE) && mmc->card) ||
|
|
((ireg & TMIO_STAT_CARD_INSERT) && !mmc->card)) &&
|
|
!work_pending(&mmc->detect.work))
|
|
mmc_detect_change(host->mmc, msecs_to_jiffies(100));
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid)
|
|
{
|
|
unsigned int ireg, status;
|
|
struct tmio_mmc_host *host = devid;
|
|
|
|
tmio_mmc_card_irq_status(host, &ireg, &status);
|
|
__tmio_mmc_card_detect_irq(host, ireg, status);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
EXPORT_SYMBOL(tmio_mmc_card_detect_irq);
|
|
|
|
static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host,
|
|
int ireg, int status)
|
|
{
|
|
/* Command completion */
|
|
if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) {
|
|
tmio_mmc_ack_mmc_irqs(host,
|
|
TMIO_STAT_CMDRESPEND |
|
|
TMIO_STAT_CMDTIMEOUT);
|
|
tmio_mmc_cmd_irq(host, status);
|
|
return true;
|
|
}
|
|
|
|
/* Data transfer */
|
|
if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) {
|
|
tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ);
|
|
tmio_mmc_pio_irq(host);
|
|
return true;
|
|
}
|
|
|
|
/* Data transfer completion */
|
|
if (ireg & TMIO_STAT_DATAEND) {
|
|
tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_DATAEND);
|
|
tmio_mmc_data_irq(host);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid)
|
|
{
|
|
unsigned int ireg, status;
|
|
struct tmio_mmc_host *host = devid;
|
|
|
|
tmio_mmc_card_irq_status(host, &ireg, &status);
|
|
__tmio_mmc_sdcard_irq(host, ireg, status);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
EXPORT_SYMBOL(tmio_mmc_sdcard_irq);
|
|
|
|
irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid)
|
|
{
|
|
struct tmio_mmc_host *host = devid;
|
|
struct mmc_host *mmc = host->mmc;
|
|
struct tmio_mmc_data *pdata = host->pdata;
|
|
unsigned int ireg, status;
|
|
|
|
if (!(pdata->flags & TMIO_MMC_SDIO_IRQ))
|
|
return IRQ_HANDLED;
|
|
|
|
status = sd_ctrl_read16(host, CTL_SDIO_STATUS);
|
|
ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdcard_irq_mask;
|
|
|
|
sd_ctrl_write16(host, CTL_SDIO_STATUS, status & ~TMIO_SDIO_MASK_ALL);
|
|
|
|
if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ)
|
|
mmc_signal_sdio_irq(mmc);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
EXPORT_SYMBOL(tmio_mmc_sdio_irq);
|
|
|
|
irqreturn_t tmio_mmc_irq(int irq, void *devid)
|
|
{
|
|
struct tmio_mmc_host *host = devid;
|
|
unsigned int ireg, status;
|
|
|
|
pr_debug("MMC IRQ begin\n");
|
|
|
|
tmio_mmc_card_irq_status(host, &ireg, &status);
|
|
if (__tmio_mmc_card_detect_irq(host, ireg, status))
|
|
return IRQ_HANDLED;
|
|
if (__tmio_mmc_sdcard_irq(host, ireg, status))
|
|
return IRQ_HANDLED;
|
|
|
|
tmio_mmc_sdio_irq(irq, devid);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
EXPORT_SYMBOL(tmio_mmc_irq);
|
|
|
|
static int tmio_mmc_start_data(struct tmio_mmc_host *host,
|
|
struct mmc_data *data)
|
|
{
|
|
struct tmio_mmc_data *pdata = host->pdata;
|
|
|
|
pr_debug("setup data transfer: blocksize %08x nr_blocks %d\n",
|
|
data->blksz, data->blocks);
|
|
|
|
/* Some hardware cannot perform 2 byte requests in 4 bit mode */
|
|
if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) {
|
|
int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES;
|
|
|
|
if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) {
|
|
pr_err("%s: %d byte block unsupported in 4 bit mode\n",
|
|
mmc_hostname(host->mmc), data->blksz);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
tmio_mmc_init_sg(host, data);
|
|
host->data = data;
|
|
|
|
/* Set transfer length / blocksize */
|
|
sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz);
|
|
sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks);
|
|
|
|
tmio_mmc_start_dma(host, data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Process requests from the MMC layer */
|
|
static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
|
|
{
|
|
struct tmio_mmc_host *host = mmc_priv(mmc);
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
|
|
if (host->mrq) {
|
|
pr_debug("request not null\n");
|
|
if (IS_ERR(host->mrq)) {
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
mrq->cmd->error = -EAGAIN;
|
|
mmc_request_done(mmc, mrq);
|
|
return;
|
|
}
|
|
}
|
|
|
|
host->last_req_ts = jiffies;
|
|
wmb();
|
|
host->mrq = mrq;
|
|
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
|
|
if (mrq->data) {
|
|
ret = tmio_mmc_start_data(host, mrq->data);
|
|
if (ret)
|
|
goto fail;
|
|
}
|
|
|
|
ret = tmio_mmc_start_command(host, mrq->cmd);
|
|
if (!ret) {
|
|
schedule_delayed_work(&host->delayed_reset_work,
|
|
msecs_to_jiffies(2000));
|
|
return;
|
|
}
|
|
|
|
fail:
|
|
host->force_pio = false;
|
|
host->mrq = NULL;
|
|
mrq->cmd->error = ret;
|
|
mmc_request_done(mmc, mrq);
|
|
}
|
|
|
|
/* Set MMC clock / power.
|
|
* Note: This controller uses a simple divider scheme therefore it cannot
|
|
* run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as
|
|
* MMC wont run that fast, it has to be clocked at 12MHz which is the next
|
|
* slowest setting.
|
|
*/
|
|
static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
|
|
{
|
|
struct tmio_mmc_host *host = mmc_priv(mmc);
|
|
struct tmio_mmc_data *pdata = host->pdata;
|
|
unsigned long flags;
|
|
|
|
mutex_lock(&host->ios_lock);
|
|
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
if (host->mrq) {
|
|
if (IS_ERR(host->mrq)) {
|
|
dev_dbg(&host->pdev->dev,
|
|
"%s.%d: concurrent .set_ios(), clk %u, mode %u\n",
|
|
current->comm, task_pid_nr(current),
|
|
ios->clock, ios->power_mode);
|
|
host->mrq = ERR_PTR(-EINTR);
|
|
} else {
|
|
dev_dbg(&host->pdev->dev,
|
|
"%s.%d: CMD%u active since %lu, now %lu!\n",
|
|
current->comm, task_pid_nr(current),
|
|
host->mrq->cmd->opcode, host->last_req_ts, jiffies);
|
|
}
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
|
|
mutex_unlock(&host->ios_lock);
|
|
return;
|
|
}
|
|
|
|
host->mrq = ERR_PTR(-EBUSY);
|
|
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
|
|
/*
|
|
* pdata->power == false only if COLD_CD is available, otherwise only
|
|
* in short time intervals during probing or resuming
|
|
*/
|
|
if (ios->power_mode == MMC_POWER_ON && ios->clock) {
|
|
if (!pdata->power) {
|
|
pm_runtime_get_sync(&host->pdev->dev);
|
|
pdata->power = true;
|
|
}
|
|
tmio_mmc_set_clock(host, ios->clock);
|
|
/* power up SD bus */
|
|
if (host->set_pwr)
|
|
host->set_pwr(host->pdev, 1);
|
|
/* start bus clock */
|
|
tmio_mmc_clk_start(host);
|
|
} else if (ios->power_mode != MMC_POWER_UP) {
|
|
if (host->set_pwr && ios->power_mode == MMC_POWER_OFF)
|
|
host->set_pwr(host->pdev, 0);
|
|
if ((pdata->flags & TMIO_MMC_HAS_COLD_CD) &&
|
|
pdata->power) {
|
|
pdata->power = false;
|
|
pm_runtime_put(&host->pdev->dev);
|
|
}
|
|
tmio_mmc_clk_stop(host);
|
|
}
|
|
|
|
switch (ios->bus_width) {
|
|
case MMC_BUS_WIDTH_1:
|
|
sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x80e0);
|
|
break;
|
|
case MMC_BUS_WIDTH_4:
|
|
sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x00e0);
|
|
break;
|
|
}
|
|
|
|
/* Let things settle. delay taken from winCE driver */
|
|
udelay(140);
|
|
if (PTR_ERR(host->mrq) == -EINTR)
|
|
dev_dbg(&host->pdev->dev,
|
|
"%s.%d: IOS interrupted: clk %u, mode %u",
|
|
current->comm, task_pid_nr(current),
|
|
ios->clock, ios->power_mode);
|
|
host->mrq = NULL;
|
|
|
|
mutex_unlock(&host->ios_lock);
|
|
}
|
|
|
|
static int tmio_mmc_get_ro(struct mmc_host *mmc)
|
|
{
|
|
struct tmio_mmc_host *host = mmc_priv(mmc);
|
|
struct tmio_mmc_data *pdata = host->pdata;
|
|
|
|
return !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) ||
|
|
(sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT));
|
|
}
|
|
|
|
static int tmio_mmc_get_cd(struct mmc_host *mmc)
|
|
{
|
|
struct tmio_mmc_host *host = mmc_priv(mmc);
|
|
struct tmio_mmc_data *pdata = host->pdata;
|
|
|
|
if (!pdata->get_cd)
|
|
return -ENOSYS;
|
|
else
|
|
return pdata->get_cd(host->pdev);
|
|
}
|
|
|
|
static const struct mmc_host_ops tmio_mmc_ops = {
|
|
.request = tmio_mmc_request,
|
|
.set_ios = tmio_mmc_set_ios,
|
|
.get_ro = tmio_mmc_get_ro,
|
|
.get_cd = tmio_mmc_get_cd,
|
|
.enable_sdio_irq = tmio_mmc_enable_sdio_irq,
|
|
};
|
|
|
|
int __devinit tmio_mmc_host_probe(struct tmio_mmc_host **host,
|
|
struct platform_device *pdev,
|
|
struct tmio_mmc_data *pdata)
|
|
{
|
|
struct tmio_mmc_host *_host;
|
|
struct mmc_host *mmc;
|
|
struct resource *res_ctl;
|
|
int ret;
|
|
u32 irq_mask = TMIO_MASK_CMD;
|
|
|
|
res_ctl = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res_ctl)
|
|
return -EINVAL;
|
|
|
|
mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev);
|
|
if (!mmc)
|
|
return -ENOMEM;
|
|
|
|
pdata->dev = &pdev->dev;
|
|
_host = mmc_priv(mmc);
|
|
_host->pdata = pdata;
|
|
_host->mmc = mmc;
|
|
_host->pdev = pdev;
|
|
platform_set_drvdata(pdev, mmc);
|
|
|
|
_host->set_pwr = pdata->set_pwr;
|
|
_host->set_clk_div = pdata->set_clk_div;
|
|
|
|
/* SD control register space size is 0x200, 0x400 for bus_shift=1 */
|
|
_host->bus_shift = resource_size(res_ctl) >> 10;
|
|
|
|
_host->ctl = ioremap(res_ctl->start, resource_size(res_ctl));
|
|
if (!_host->ctl) {
|
|
ret = -ENOMEM;
|
|
goto host_free;
|
|
}
|
|
|
|
mmc->ops = &tmio_mmc_ops;
|
|
mmc->caps = MMC_CAP_4_BIT_DATA | pdata->capabilities;
|
|
mmc->f_max = pdata->hclk;
|
|
mmc->f_min = mmc->f_max / 512;
|
|
mmc->max_segs = 32;
|
|
mmc->max_blk_size = 512;
|
|
mmc->max_blk_count = (PAGE_CACHE_SIZE / mmc->max_blk_size) *
|
|
mmc->max_segs;
|
|
mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
|
|
mmc->max_seg_size = mmc->max_req_size;
|
|
if (pdata->ocr_mask)
|
|
mmc->ocr_avail = pdata->ocr_mask;
|
|
else
|
|
mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
|
|
|
|
pdata->power = false;
|
|
pm_runtime_enable(&pdev->dev);
|
|
ret = pm_runtime_resume(&pdev->dev);
|
|
if (ret < 0)
|
|
goto pm_disable;
|
|
|
|
tmio_mmc_clk_stop(_host);
|
|
tmio_mmc_reset(_host);
|
|
|
|
_host->sdcard_irq_mask = sd_ctrl_read32(_host, CTL_IRQ_MASK);
|
|
tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL);
|
|
if (pdata->flags & TMIO_MMC_SDIO_IRQ)
|
|
tmio_mmc_enable_sdio_irq(mmc, 0);
|
|
|
|
spin_lock_init(&_host->lock);
|
|
mutex_init(&_host->ios_lock);
|
|
|
|
/* Init delayed work for request timeouts */
|
|
INIT_DELAYED_WORK(&_host->delayed_reset_work, tmio_mmc_reset_work);
|
|
INIT_WORK(&_host->done, tmio_mmc_done_work);
|
|
|
|
/* See if we also get DMA */
|
|
tmio_mmc_request_dma(_host, pdata);
|
|
|
|
/* We have to keep the device powered for its card detection to work */
|
|
if (!(pdata->flags & TMIO_MMC_HAS_COLD_CD)) {
|
|
pdata->power = true;
|
|
pm_runtime_get_noresume(&pdev->dev);
|
|
}
|
|
|
|
mmc_add_host(mmc);
|
|
|
|
/* Unmask the IRQs we want to know about */
|
|
if (!_host->chan_rx)
|
|
irq_mask |= TMIO_MASK_READOP;
|
|
if (!_host->chan_tx)
|
|
irq_mask |= TMIO_MASK_WRITEOP;
|
|
|
|
tmio_mmc_enable_mmc_irqs(_host, irq_mask);
|
|
|
|
*host = _host;
|
|
|
|
return 0;
|
|
|
|
pm_disable:
|
|
pm_runtime_disable(&pdev->dev);
|
|
iounmap(_host->ctl);
|
|
host_free:
|
|
mmc_free_host(mmc);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(tmio_mmc_host_probe);
|
|
|
|
void tmio_mmc_host_remove(struct tmio_mmc_host *host)
|
|
{
|
|
struct platform_device *pdev = host->pdev;
|
|
|
|
/*
|
|
* We don't have to manipulate pdata->power here: if there is a card in
|
|
* the slot, the runtime PM is active and our .runtime_resume() will not
|
|
* be run. If there is no card in the slot and the platform can suspend
|
|
* the controller, the runtime PM is suspended and pdata->power == false,
|
|
* so, our .runtime_resume() will not try to detect a card in the slot.
|
|
*/
|
|
if (host->pdata->flags & TMIO_MMC_HAS_COLD_CD)
|
|
pm_runtime_get_sync(&pdev->dev);
|
|
|
|
mmc_remove_host(host->mmc);
|
|
cancel_work_sync(&host->done);
|
|
cancel_delayed_work_sync(&host->delayed_reset_work);
|
|
tmio_mmc_release_dma(host);
|
|
|
|
pm_runtime_put_sync(&pdev->dev);
|
|
pm_runtime_disable(&pdev->dev);
|
|
|
|
iounmap(host->ctl);
|
|
mmc_free_host(host->mmc);
|
|
}
|
|
EXPORT_SYMBOL(tmio_mmc_host_remove);
|
|
|
|
#ifdef CONFIG_PM
|
|
int tmio_mmc_host_suspend(struct device *dev)
|
|
{
|
|
struct mmc_host *mmc = dev_get_drvdata(dev);
|
|
struct tmio_mmc_host *host = mmc_priv(mmc);
|
|
int ret = mmc_suspend_host(mmc);
|
|
|
|
if (!ret)
|
|
tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_ALL);
|
|
|
|
host->pm_error = pm_runtime_put_sync(dev);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(tmio_mmc_host_suspend);
|
|
|
|
int tmio_mmc_host_resume(struct device *dev)
|
|
{
|
|
struct mmc_host *mmc = dev_get_drvdata(dev);
|
|
struct tmio_mmc_host *host = mmc_priv(mmc);
|
|
|
|
/* The MMC core will perform the complete set up */
|
|
host->pdata->power = false;
|
|
|
|
host->pm_global = true;
|
|
if (!host->pm_error)
|
|
pm_runtime_get_sync(dev);
|
|
|
|
if (host->pm_global) {
|
|
/* Runtime PM resume callback didn't run */
|
|
tmio_mmc_reset(host);
|
|
tmio_mmc_enable_dma(host, true);
|
|
host->pm_global = false;
|
|
}
|
|
|
|
return mmc_resume_host(mmc);
|
|
}
|
|
EXPORT_SYMBOL(tmio_mmc_host_resume);
|
|
|
|
#endif /* CONFIG_PM */
|
|
|
|
int tmio_mmc_host_runtime_suspend(struct device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(tmio_mmc_host_runtime_suspend);
|
|
|
|
int tmio_mmc_host_runtime_resume(struct device *dev)
|
|
{
|
|
struct mmc_host *mmc = dev_get_drvdata(dev);
|
|
struct tmio_mmc_host *host = mmc_priv(mmc);
|
|
struct tmio_mmc_data *pdata = host->pdata;
|
|
|
|
tmio_mmc_reset(host);
|
|
tmio_mmc_enable_dma(host, true);
|
|
|
|
if (pdata->power) {
|
|
/* Only entered after a card-insert interrupt */
|
|
if (!mmc->card)
|
|
tmio_mmc_set_ios(mmc, &mmc->ios);
|
|
mmc_detect_change(mmc, msecs_to_jiffies(100));
|
|
}
|
|
host->pm_global = false;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(tmio_mmc_host_runtime_resume);
|
|
|
|
MODULE_LICENSE("GPL v2");
|