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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc

Browse Source 
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (26 commits)
  mmc: SDHI should depend on SUPERH || ARCH_SHMOBILE
  mmc: tmio_mmc: Move some defines into a shared header
  mmc: tmio: support aggressive clock gating
  mmc: tmio: fix power-mode interpretation
  mmc: tmio: remove work-around for unmasked SDIO interrupts
  sh: fix SDHI IO address-range
  ARM: mach-shmobile: fix SDHI IO address-range
  mmc: tmio: only access registers above 0xff, if available
  mfd: remove now redundant sh_mobile_sdhi.h header
  sh: convert boards to use linux/mmc/sh_mobile_sdhi.h
  ARM: mach-shmobile: convert boards to use linux/mmc/sh_mobile_sdhi.h
  mmc: tmio: convert the SDHI MMC driver from MFD to a platform driver
  sh: ecovec: use the CONFIG_MMC_TMIO symbols instead of MFD
  mmc: tmio: split core functionality, DMA and MFD glue
  mmc: tmio: use PIO for short transfers
  mmc: tmio-mmc: Improve DMA stability on sh-mobile
  mmc: fix mmc_app_send_scr() for dma transfer
  mmc: sdhci-esdhc: enable esdhc on imx53
  mmc: sdhci-esdhc: use writel/readl as general APIs
  mmc: sdhci: add the abort CMDTYPE bits definition
  ...
This commit is contained in:
Linus Torvalds
2011-03-29 12:09:30 -07:00
parent eefbab5995 022b483596
commit 6b2a4f7a5b
31 changed files with 1615 additions and 1396 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/mmc/card/mmc_test.c
View File

@@ -1875,7 +1875,7 @@ static int mmc_test_seq_perf(struct mmc_test_card *test, int write,
unsigned int tot_sz, int max_scatter)
{
unsigned int dev_addr, i, cnt, sz, ssz;
struct timespec ts1, ts2, ts;
struct timespec ts1, ts2;
int ret;
sz = test->area.max_tfr;
@@ -1912,7 +1912,6 @@ static int mmc_test_seq_perf(struct mmc_test_card *test, int write,
}
getnstimeofday(&ts2);
ts = timespec_sub(ts2, ts1);
mmc_test_print_avg_rate(test, sz, cnt, &ts1, &ts2);
return 0;

14
drivers/mmc/core/sd_ops.c
View File

@@ -9,6 +9,7 @@
* your option) any later version.
*/
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/scatterlist.h>
@@ -252,6 +253,7 @@ int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
struct mmc_command cmd;
struct mmc_data data;
struct scatterlist sg;
void *data_buf;
BUG_ON(!card);
BUG_ON(!card->host);
@@ -263,6 +265,13 @@ int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
if (err)
return err;
/* dma onto stack is unsafe/nonportable, but callers to this
* routine normally provide temporary on-stack buffers ...
*/
data_buf = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
if (data_buf == NULL)
return -ENOMEM;
memset(&mrq, 0, sizeof(struct mmc_request));
memset(&cmd, 0, sizeof(struct mmc_command));
memset(&data, 0, sizeof(struct mmc_data));
@@ -280,12 +289,15 @@ int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
data.sg = &sg;
data.sg_len = 1;
sg_init_one(&sg, scr, 8);
sg_init_one(&sg, data_buf, 8);
mmc_set_data_timeout(&data, card);
mmc_wait_for_req(card->host, &mrq);
memcpy(scr, data_buf, sizeof(card->raw_scr));
kfree(data_buf);
if (cmd.error)
return cmd.error;
if (data.error)

14
drivers/mmc/host/Kconfig
View File

@@ -439,13 +439,25 @@ config MMC_SDRICOH_CS
To compile this driver as a module, choose M here: the
module will be called sdricoh_cs.
config MMC_TMIO_CORE
tristate
config MMC_TMIO
tristate "Toshiba Mobile IO Controller (TMIO) MMC/SD function support"
depends on MFD_TMIO || MFD_ASIC3 || MFD_SH_MOBILE_SDHI
depends on MFD_TMIO || MFD_ASIC3
select MMC_TMIO_CORE
help
This provides support for the SD/MMC cell found in TC6393XB,
T7L66XB and also HTC ASIC3
config MMC_SDHI
tristate "SH-Mobile SDHI SD/SDIO controller support"
depends on SUPERH || ARCH_SHMOBILE
select MMC_TMIO_CORE
help
This provides support for the SDHI SD/SDIO controller found in
SuperH and ARM SH-Mobile SoCs
config MMC_CB710
tristate "ENE CB710 MMC/SD Interface support"
depends on PCI

8
drivers/mmc/host/Makefile
View File

@@ -29,7 +29,13 @@ endif
obj-$(CONFIG_MMC_S3C) += s3cmci.o
obj-$(CONFIG_MMC_SDRICOH_CS) += sdricoh_cs.o
obj-$(CONFIG_MMC_TMIO) += tmio_mmc.o
obj-$(CONFIG_MMC_CB710) += cb710-mmc.o
obj-$(CONFIG_MMC_TMIO_CORE) += tmio_mmc_core.o
tmio_mmc_core-y := tmio_mmc_pio.o
ifneq ($(CONFIG_MMC_SDHI),n)
tmio_mmc_core-y += tmio_mmc_dma.o
endif
obj-$(CONFIG_MMC_SDHI) += sh_mobile_sdhi.o
obj-$(CONFIG_MMC_CB710) += cb710-mmc.o
obj-$(CONFIG_MMC_VIA_SDMMC) += via-sdmmc.o
obj-$(CONFIG_SDH_BFIN) += bfin_sdh.o
obj-$(CONFIG_MMC_DW) += dw_mmc.o

4
drivers/mmc/host/dw_mmc.c
View File

@@ -316,7 +316,7 @@ static void dw_mci_idmac_stop_dma(struct dw_mci *host)
/* Stop the IDMAC running */
temp = mci_readl(host, BMOD);
temp &= ~SDMMC_IDMAC_ENABLE;
temp &= ~(SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB);
mci_writel(host, BMOD, temp);
}
@@ -385,7 +385,7 @@ static void dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len)
/* Enable the IDMAC */
temp = mci_readl(host, BMOD);
temp |= SDMMC_IDMAC_ENABLE;
temp |= SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB;
mci_writel(host, BMOD, temp);
/* Start it running */

13
drivers/mmc/host/mmci.c
View File

@@ -68,6 +68,12 @@ static struct variant_data variant_arm = {
.datalength_bits = 16,
};
static struct variant_data variant_arm_extended_fifo = {
.fifosize = 128 * 4,
.fifohalfsize = 64 * 4,
.datalength_bits = 16,
};
static struct variant_data variant_u300 = {
.fifosize = 16 * 4,
.fifohalfsize = 8 * 4,
@@ -1277,9 +1283,14 @@ static int mmci_resume(struct amba_device *dev)
static struct amba_id mmci_ids[] = {
{
.id = 0x00041180,
.mask = 0x000fffff,
.mask = 0xff0fffff,
.data = &variant_arm,
},
{
.id = 0x01041180,
.mask = 0xff0fffff,
.data = &variant_arm_extended_fifo,
},
{
.id = 0x00041181,
.mask = 0x000fffff,

2
drivers/mmc/host/of_mmc_spi.c
View File

@@ -15,9 +15,11 @@
#include <linux/module.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/irq.h>
#include <linux/gpio.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/of_irq.h>
#include <linux/spi/spi.h>
#include <linux/spi/mmc_spi.h>
#include <linux/mmc/core.h>

86
drivers/mmc/host/sdhci-esdhc-imx.c
View File

@@ -16,14 +16,40 @@
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/mmc/host.h>
#include <linux/mmc/sdhci-pltfm.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/sdio.h>
#include <mach/hardware.h>
#include <mach/esdhc.h>
#include "sdhci.h"
#include "sdhci-pltfm.h"
#include "sdhci-esdhc.h"
/* VENDOR SPEC register */
#define SDHCI_VENDOR_SPEC 0xC0
#define SDHCI_VENDOR_SPEC_SDIO_QUIRK 0x00000002
#define ESDHC_FLAG_GPIO_FOR_CD_WP (1 << 0)
/*
* The CMDTYPE of the CMD register (offset 0xE) should be set to
* "11" when the STOP CMD12 is issued on imx53 to abort one
* open ended multi-blk IO. Otherwise the TC INT wouldn't
* be generated.
* In exact block transfer, the controller doesn't complete the
* operations automatically as required at the end of the
* transfer and remains on hold if the abort command is not sent.
* As a result, the TC flag is not asserted and SW received timeout
* exeception. Bit1 of Vendor Spec registor is used to fix it.
*/
#define ESDHC_FLAG_MULTIBLK_NO_INT (1 << 1)
struct pltfm_imx_data {
int flags;
u32 scratchpad;
};
static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, int reg)
{
void __iomem *base = host->ioaddr + (reg & ~0x3);
@@ -34,10 +60,14 @@ static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, i
static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct pltfm_imx_data *imx_data = pltfm_host->priv;
/* fake CARD_PRESENT flag on mx25/35 */
u32 val = readl(host->ioaddr + reg);
if (unlikely(reg == SDHCI_PRESENT_STATE)) {
if (unlikely((reg == SDHCI_PRESENT_STATE)
&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD_WP))) {
struct esdhc_platform_data *boarddata =
host->mmc->parent->platform_data;
@@ -55,13 +85,26 @@ static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
{
if (unlikely(reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE))
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct pltfm_imx_data *imx_data = pltfm_host->priv;
if (unlikely((reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE)
&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD_WP)))
/*
* these interrupts won't work with a custom card_detect gpio
* (only applied to mx25/35)
*/
val &= ~(SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT);
if (unlikely((imx_data->flags & ESDHC_FLAG_MULTIBLK_NO_INT)
&& (reg == SDHCI_INT_STATUS)
&& (val & SDHCI_INT_DATA_END))) {
u32 v;
v = readl(host->ioaddr + SDHCI_VENDOR_SPEC);
v &= ~SDHCI_VENDOR_SPEC_SDIO_QUIRK;
writel(v, host->ioaddr + SDHCI_VENDOR_SPEC);
}
writel(val, host->ioaddr + reg);
}
@@ -76,6 +119,7 @@ static u16 esdhc_readw_le(struct sdhci_host *host, int reg)
static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct pltfm_imx_data *imx_data = pltfm_host->priv;
switch (reg) {
case SDHCI_TRANSFER_MODE:
@@ -83,10 +127,22 @@ static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg)
* Postpone this write, we must do it together with a
* command write that is down below.
*/
pltfm_host->scratchpad = val;
if ((imx_data->flags & ESDHC_FLAG_MULTIBLK_NO_INT)
&& (host->cmd->opcode == SD_IO_RW_EXTENDED)
&& (host->cmd->data->blocks > 1)
&& (host->cmd->data->flags & MMC_DATA_READ)) {
u32 v;
v = readl(host->ioaddr + SDHCI_VENDOR_SPEC);
v |= SDHCI_VENDOR_SPEC_SDIO_QUIRK;
writel(v, host->ioaddr + SDHCI_VENDOR_SPEC);
}
imx_data->scratchpad = val;
return;
case SDHCI_COMMAND:
writel(val << 16 | pltfm_host->scratchpad,
if ((host->cmd->opcode == MMC_STOP_TRANSMISSION)
&& (imx_data->flags & ESDHC_FLAG_MULTIBLK_NO_INT))
val |= SDHCI_CMD_ABORTCMD;
writel(val << 16 | imx_data->scratchpad,
host->ioaddr + SDHCI_TRANSFER_MODE);
return;
case SDHCI_BLOCK_SIZE:
@@ -146,7 +202,9 @@ static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
}
static struct sdhci_ops sdhci_esdhc_ops = {
.read_l = esdhc_readl_le,
.read_w = esdhc_readw_le,
.write_l = esdhc_writel_le,
.write_w = esdhc_writew_le,
.write_b = esdhc_writeb_le,
.set_clock = esdhc_set_clock,
@@ -168,6 +226,7 @@ static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pd
struct esdhc_platform_data *boarddata = host->mmc->parent->platform_data;
struct clk *clk;
int err;
struct pltfm_imx_data *imx_data;
clk = clk_get(mmc_dev(host->mmc), NULL);
if (IS_ERR(clk)) {
@@ -177,7 +236,15 @@ static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pd
clk_enable(clk);
pltfm_host->clk = clk;
if (cpu_is_mx35() || cpu_is_mx51())
imx_data = kzalloc(sizeof(struct pltfm_imx_data), GFP_KERNEL);
if (!imx_data) {
clk_disable(pltfm_host->clk);
clk_put(pltfm_host->clk);
return -ENOMEM;
}
pltfm_host->priv = imx_data;
if (!cpu_is_mx25())
host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
if (cpu_is_mx25() || cpu_is_mx35()) {
@@ -187,6 +254,9 @@ static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pd
sdhci_esdhc_ops.get_ro = esdhc_pltfm_get_ro;
}
if (!(cpu_is_mx25() || cpu_is_mx35() || cpu_is_mx51()))
imx_data->flags |= ESDHC_FLAG_MULTIBLK_NO_INT;
if (boarddata) {
err = gpio_request_one(boarddata->wp_gpio, GPIOF_IN, "ESDHC_WP");
if (err) {
@@ -214,8 +284,7 @@ static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pd
goto no_card_detect_irq;
}
sdhci_esdhc_ops.write_l = esdhc_writel_le;
sdhci_esdhc_ops.read_l = esdhc_readl_le;
imx_data->flags |= ESDHC_FLAG_GPIO_FOR_CD_WP;
/* Now we have a working card_detect again */
host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
}
@@ -227,6 +296,7 @@ static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pd
no_card_detect_pin:
boarddata->cd_gpio = err;
not_supported:
kfree(imx_data);
return 0;
}
@@ -234,6 +304,7 @@ static void esdhc_pltfm_exit(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct esdhc_platform_data *boarddata = host->mmc->parent->platform_data;
struct pltfm_imx_data *imx_data = pltfm_host->priv;
if (boarddata && gpio_is_valid(boarddata->wp_gpio))
gpio_free(boarddata->wp_gpio);
@@ -247,6 +318,7 @@ static void esdhc_pltfm_exit(struct sdhci_host *host)
clk_disable(pltfm_host->clk);
clk_put(pltfm_host->clk);
kfree(imx_data);
}
struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {

3
drivers/mmc/host/sdhci-esdhc.h
View File

@@ -23,8 +23,7 @@
SDHCI_QUIRK_NONSTANDARD_CLOCK | \
SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | \
SDHCI_QUIRK_PIO_NEEDS_DELAY | \
SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET | \
SDHCI_QUIRK_NO_CARD_NO_RESET)
SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET)
#define ESDHC_SYSTEM_CONTROL 0x2c
#define ESDHC_CLOCK_MASK 0x0000fff0

3
drivers/mmc/host/sdhci-of-esdhc.c
View File

@@ -74,7 +74,8 @@ static unsigned int esdhc_of_get_min_clock(struct sdhci_host *host)
struct sdhci_of_data sdhci_esdhc = {
/* card detection could be handled via GPIO */
.quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_BROKEN_CARD_DETECTION,
.quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_BROKEN_CARD_DETECTION
| SDHCI_QUIRK_NO_CARD_NO_RESET,
.ops = {
.read_l = sdhci_be32bs_readl,
.read_w = esdhc_readw,

6
drivers/mmc/host/sdhci-pci.c
View File

@@ -1016,16 +1016,14 @@ static int __devinit sdhci_pci_probe(struct pci_dev *pdev,
struct sdhci_pci_chip *chip;
struct sdhci_pci_slot *slot;
u8 slots, rev, first_bar;
u8 slots, first_bar;
int ret, i;
BUG_ON(pdev == NULL);
BUG_ON(ent == NULL);
pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev);
dev_info(&pdev->dev, "SDHCI controller found [%04x:%04x] (rev %x)\n",
(int)pdev->vendor, (int)pdev->device, (int)rev);
(int)pdev->vendor, (int)pdev->device, (int)pdev->revision);
ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
if (ret)

2
drivers/mmc/host/sdhci-pltfm.h
View File

@@ -17,7 +17,7 @@
struct sdhci_pltfm_host {
struct clk *clk;
u32 scratchpad; /* to handle quirks across io-accessor calls */
void *priv; /* to handle quirks across io-accessor calls */
};
extern struct sdhci_pltfm_data sdhci_cns3xxx_pdata;

1
drivers/mmc/host/sdhci.h
View File

@@ -45,6 +45,7 @@
#define SDHCI_CMD_CRC 0x08
#define SDHCI_CMD_INDEX 0x10
#define SDHCI_CMD_DATA 0x20
#define SDHCI_CMD_ABORTCMD 0xC0
#define SDHCI_CMD_RESP_NONE 0x00
#define SDHCI_CMD_RESP_LONG 0x01

171
drivers/mmc/host/sh_mobile_sdhi.c Normal file
View File

@@ -0,0 +1,171 @@
/*
* SuperH Mobile SDHI
*
* Copyright (C) 2009 Magnus Damm
*
* 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.
*
* Based on "Compaq ASIC3 support":
*
* Copyright 2001 Compaq Computer Corporation.
* Copyright 2004-2005 Phil Blundell
* Copyright 2007-2008 OpenedHand Ltd.
*
* Authors: Phil Blundell <pb@handhelds.org>,
* Samuel Ortiz <sameo@openedhand.com>
*
*/
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/mmc/host.h>
#include <linux/mmc/sh_mobile_sdhi.h>
#include <linux/mfd/tmio.h>
#include <linux/sh_dma.h>
#include "tmio_mmc.h"
struct sh_mobile_sdhi {
struct clk *clk;
struct tmio_mmc_data mmc_data;
struct sh_dmae_slave param_tx;
struct sh_dmae_slave param_rx;
struct tmio_mmc_dma dma_priv;
};
static void sh_mobile_sdhi_set_pwr(struct platform_device *pdev, int state)
{
struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
if (p && p->set_pwr)
p->set_pwr(pdev, state);
}
static int sh_mobile_sdhi_get_cd(struct platform_device *pdev)
{
struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
if (p && p->get_cd)
return p->get_cd(pdev);
else
return -ENOSYS;
}
static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
{
struct sh_mobile_sdhi *priv;
struct tmio_mmc_data *mmc_data;
struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
struct tmio_mmc_host *host;
char clk_name[8];
int ret;
priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
if (priv == NULL) {
dev_err(&pdev->dev, "kzalloc failed\n");
return -ENOMEM;
}
mmc_data = &priv->mmc_data;
snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id);
priv->clk = clk_get(&pdev->dev, clk_name);
if (IS_ERR(priv->clk)) {
dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
ret = PTR_ERR(priv->clk);
goto eclkget;
}
clk_enable(priv->clk);
mmc_data->hclk = clk_get_rate(priv->clk);
mmc_data->set_pwr = sh_mobile_sdhi_set_pwr;
mmc_data->get_cd = sh_mobile_sdhi_get_cd;
mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
if (p) {
mmc_data->flags = p->tmio_flags;
mmc_data->ocr_mask = p->tmio_ocr_mask;
mmc_data->capabilities |= p->tmio_caps;
if (p->dma_slave_tx >= 0 && p->dma_slave_rx >= 0) {
priv->param_tx.slave_id = p->dma_slave_tx;
priv->param_rx.slave_id = p->dma_slave_rx;
priv->dma_priv.chan_priv_tx = &priv->param_tx;
priv->dma_priv.chan_priv_rx = &priv->param_rx;
priv->dma_priv.alignment_shift = 1; /* 2-byte alignment */
mmc_data->dma = &priv->dma_priv;
}
}
/*
* All SDHI blocks support 2-byte and larger block sizes in 4-bit
* bus width mode.
*/
mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES;
/*
* All SDHI blocks support SDIO IRQ signalling.
*/
mmc_data->flags |= TMIO_MMC_SDIO_IRQ;
ret = tmio_mmc_host_probe(&host, pdev, mmc_data);
if (ret < 0)
goto eprobe;
pr_info("%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc),
(unsigned long)host->ctl, host->irq);
return ret;
eprobe:
clk_disable(priv->clk);
clk_put(priv->clk);
eclkget:
kfree(priv);
return ret;
}
static int sh_mobile_sdhi_remove(struct platform_device *pdev)
{
struct mmc_host *mmc = platform_get_drvdata(pdev);
struct tmio_mmc_host *host = mmc_priv(mmc);
struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data);
tmio_mmc_host_remove(host);
clk_disable(priv->clk);
clk_put(priv->clk);
kfree(priv);
return 0;
}
static struct platform_driver sh_mobile_sdhi_driver = {
.driver = {
.name = "sh_mobile_sdhi",
.owner = THIS_MODULE,
},
.probe = sh_mobile_sdhi_probe,
.remove = __devexit_p(sh_mobile_sdhi_remove),
};
static int __init sh_mobile_sdhi_init(void)
{
return platform_driver_register(&sh_mobile_sdhi_driver);
}
static void __exit sh_mobile_sdhi_exit(void)
{
platform_driver_unregister(&sh_mobile_sdhi_driver);
}
module_init(sh_mobile_sdhi_init);
module_exit(sh_mobile_sdhi_exit);
MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
MODULE_AUTHOR("Magnus Damm");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:sh_mobile_sdhi");

1285
drivers/mmc/host/tmio_mmc.c
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123
drivers/mmc/host/tmio_mmc.h Normal file
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/*
* linux/drivers/mmc/host/tmio_mmc.h
*
* 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 cell found in:
*
* TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
*/
#ifndef TMIO_MMC_H
#define TMIO_MMC_H
#include <linux/highmem.h>
#include <linux/mmc/tmio.h>
#include <linux/pagemap.h>
/* Definitions for values the CTRL_SDIO_STATUS register can take. */
#define TMIO_SDIO_STAT_IOIRQ 0x0001
#define TMIO_SDIO_STAT_EXPUB52 0x4000
#define TMIO_SDIO_STAT_EXWT 0x8000
#define TMIO_SDIO_MASK_ALL 0xc007
/* Define some IRQ masks */
/* This is the mask used at reset by the chip */
#define TMIO_MASK_ALL 0x837f031d
#define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND)
#define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND)
#define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
#define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
struct tmio_mmc_data;
struct tmio_mmc_host {
void __iomem *ctl;
unsigned long bus_shift;
struct mmc_command *cmd;
struct mmc_request *mrq;
struct mmc_data *data;
struct mmc_host *mmc;
int irq;
unsigned int sdio_irq_enabled;
/* Callbacks for clock / power control */
void (*set_pwr)(struct platform_device *host, int state);
void (*set_clk_div)(struct platform_device *host, int state);
/* pio related stuff */
struct scatterlist *sg_ptr;
struct scatterlist *sg_orig;
unsigned int sg_len;
unsigned int sg_off;
struct platform_device *pdev;
struct tmio_mmc_data *pdata;
/* DMA support */
bool force_pio;
struct dma_chan *chan_rx;
struct dma_chan *chan_tx;
struct tasklet_struct dma_complete;
struct tasklet_struct dma_issue;
struct scatterlist bounce_sg;
u8 *bounce_buf;
/* Track lost interrupts */
struct delayed_work delayed_reset_work;
spinlock_t lock;
unsigned long last_req_ts;
};
int tmio_mmc_host_probe(struct tmio_mmc_host **host,
struct platform_device *pdev,
struct tmio_mmc_data *pdata);
void tmio_mmc_host_remove(struct tmio_mmc_host *host);
void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
unsigned long *flags)
{
local_irq_save(*flags);
return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
}
static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
unsigned long *flags, void *virt)
{
kunmap_atomic(virt - sg->offset, KM_BIO_SRC_IRQ);
local_irq_restore(*flags);
}
#if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
void tmio_mmc_release_dma(struct tmio_mmc_host *host);
#else
static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
struct mmc_data *data)
{
}
static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
struct tmio_mmc_data *pdata)
{
host->chan_tx = NULL;
host->chan_rx = NULL;
}
static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
{
}
#endif
#endif

317
drivers/mmc/host/tmio_mmc_dma.c Normal file
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/*
* linux/drivers/mmc/tmio_mmc_dma.c
*
* Copyright (C) 2010-2011 Guennadi Liakhovetski
*
* 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.
*
* DMA function for TMIO MMC implementations
*/
#include <linux/device.h>
#include <linux/dmaengine.h>
#include <linux/mfd/tmio.h>
#include <linux/mmc/host.h>
#include <linux/mmc/tmio.h>
#include <linux/pagemap.h>
#include <linux/scatterlist.h>
#include "tmio_mmc.h"
#define TMIO_MMC_MIN_DMA_LEN 8
static void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
{
#if defined(CONFIG_SUPERH) || defined(CONFIG_ARCH_SHMOBILE)
/* Switch DMA mode on or off - SuperH specific? */
writew(enable ? 2 : 0, host->ctl + (0xd8 << host->bus_shift));
#endif
}
static void tmio_mmc_start_dma_rx(struct tmio_mmc_host *host)
{
struct scatterlist *sg = host->sg_ptr, *sg_tmp;
struct dma_async_tx_descriptor *desc = NULL;
struct dma_chan *chan = host->chan_rx;
struct tmio_mmc_data *pdata = host->pdata;
dma_cookie_t cookie;
int ret, i;
bool aligned = true, multiple = true;
unsigned int align = (1 << pdata->dma->alignment_shift) - 1;
for_each_sg(sg, sg_tmp, host->sg_len, i) {
if (sg_tmp->offset & align)
aligned = false;
if (sg_tmp->length & align) {
multiple = false;
break;
}
}
if ((!aligned && (host->sg_len > 1 || sg->length > PAGE_CACHE_SIZE ||
(align & PAGE_MASK))) || !multiple) {
ret = -EINVAL;
goto pio;
}
if (sg->length < TMIO_MMC_MIN_DMA_LEN) {
host->force_pio = true;
return;
}
tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_RXRDY);
/* The only sg element can be unaligned, use our bounce buffer then */
if (!aligned) {
sg_init_one(&host->bounce_sg, host->bounce_buf, sg->length);
host->sg_ptr = &host->bounce_sg;
sg = host->sg_ptr;
}
ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_FROM_DEVICE);
if (ret > 0)
desc = chan->device->device_prep_slave_sg(chan, sg, ret,
DMA_FROM_DEVICE, DMA_CTRL_ACK);
if (desc) {
cookie = dmaengine_submit(desc);
if (cookie < 0) {
desc = NULL;
ret = cookie;
}
}
dev_dbg(&host->pdev->dev, "%s(): mapped %d -> %d, cookie %d, rq %p\n",
__func__, host->sg_len, ret, cookie, host->mrq);
pio:
if (!desc) {
/* DMA failed, fall back to PIO */
if (ret >= 0)
ret = -EIO;
host->chan_rx = NULL;
dma_release_channel(chan);
/* Free the Tx channel too */
chan = host->chan_tx;
if (chan) {
host->chan_tx = NULL;
dma_release_channel(chan);
}
dev_warn(&host->pdev->dev,
"DMA failed: %d, falling back to PIO\n", ret);
tmio_mmc_enable_dma(host, false);
}
dev_dbg(&host->pdev->dev, "%s(): desc %p, cookie %d, sg[%d]\n", __func__,
desc, cookie, host->sg_len);
}
static void tmio_mmc_start_dma_tx(struct tmio_mmc_host *host)
{
struct scatterlist *sg = host->sg_ptr, *sg_tmp;
struct dma_async_tx_descriptor *desc = NULL;
struct dma_chan *chan = host->chan_tx;
struct tmio_mmc_data *pdata = host->pdata;
dma_cookie_t cookie;
int ret, i;
bool aligned = true, multiple = true;
unsigned int align = (1 << pdata->dma->alignment_shift) - 1;
for_each_sg(sg, sg_tmp, host->sg_len, i) {
if (sg_tmp->offset & align)
aligned = false;
if (sg_tmp->length & align) {
multiple = false;
break;
}
}
if ((!aligned && (host->sg_len > 1 || sg->length > PAGE_CACHE_SIZE ||
(align & PAGE_MASK))) || !multiple) {
ret = -EINVAL;
goto pio;
}
if (sg->length < TMIO_MMC_MIN_DMA_LEN) {
host->force_pio = true;
return;
}
tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_TXRQ);
/* The only sg element can be unaligned, use our bounce buffer then */
if (!aligned) {
unsigned long flags;
void *sg_vaddr = tmio_mmc_kmap_atomic(sg, &flags);
sg_init_one(&host->bounce_sg, host->bounce_buf, sg->length);
memcpy(host->bounce_buf, sg_vaddr, host->bounce_sg.length);
tmio_mmc_kunmap_atomic(sg, &flags, sg_vaddr);
host->sg_ptr = &host->bounce_sg;
sg = host->sg_ptr;
}
ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_TO_DEVICE);
if (ret > 0)
desc = chan->device->device_prep_slave_sg(chan, sg, ret,
DMA_TO_DEVICE, DMA_CTRL_ACK);
if (desc) {
cookie = dmaengine_submit(desc);
if (cookie < 0) {
desc = NULL;
ret = cookie;
}
}
dev_dbg(&host->pdev->dev, "%s(): mapped %d -> %d, cookie %d, rq %p\n",
__func__, host->sg_len, ret, cookie, host->mrq);
pio:
if (!desc) {
/* DMA failed, fall back to PIO */
if (ret >= 0)
ret = -EIO;
host->chan_tx = NULL;
dma_release_channel(chan);
/* Free the Rx channel too */
chan = host->chan_rx;
if (chan) {
host->chan_rx = NULL;
dma_release_channel(chan);
}
dev_warn(&host->pdev->dev,
"DMA failed: %d, falling back to PIO\n", ret);
tmio_mmc_enable_dma(host, false);
}
dev_dbg(&host->pdev->dev, "%s(): desc %p, cookie %d\n", __func__,
desc, cookie);
}
void tmio_mmc_start_dma(struct tmio_mmc_host *host,
struct mmc_data *data)
{
if (data->flags & MMC_DATA_READ) {
if (host->chan_rx)
tmio_mmc_start_dma_rx(host);
} else {
if (host->chan_tx)
tmio_mmc_start_dma_tx(host);
}
}
static void tmio_mmc_issue_tasklet_fn(unsigned long priv)
{
struct tmio_mmc_host *host = (struct tmio_mmc_host *)priv;
struct dma_chan *chan = NULL;
spin_lock_irq(&host->lock);
if (host && host->data) {
if (host->data->flags & MMC_DATA_READ)
chan = host->chan_rx;
else
chan = host->chan_tx;
}
spin_unlock_irq(&host->lock);
tmio_mmc_enable_mmc_irqs(host, TMIO_STAT_DATAEND);
if (chan)
dma_async_issue_pending(chan);
}
static void tmio_mmc_tasklet_fn(unsigned long arg)
{
struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg;
spin_lock_irq(&host->lock);
if (!host->data)
goto out;
if (host->data->flags & MMC_DATA_READ)
dma_unmap_sg(host->chan_rx->device->dev,
host->sg_ptr, host->sg_len,
DMA_FROM_DEVICE);
else
dma_unmap_sg(host->chan_tx->device->dev,
host->sg_ptr, host->sg_len,
DMA_TO_DEVICE);
tmio_mmc_do_data_irq(host);
out:
spin_unlock_irq(&host->lock);
}
/* It might be necessary to make filter MFD specific */
static bool tmio_mmc_filter(struct dma_chan *chan, void *arg)
{
dev_dbg(chan->device->dev, "%s: slave data %p\n", __func__, arg);
chan->private = arg;
return true;
}
void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata)
{
/* We can only either use DMA for both Tx and Rx or not use it at all */
if (pdata->dma) {
dma_cap_mask_t mask;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
host->chan_tx = dma_request_channel(mask, tmio_mmc_filter,
pdata->dma->chan_priv_tx);
dev_dbg(&host->pdev->dev, "%s: TX: got channel %p\n", __func__,
host->chan_tx);
if (!host->chan_tx)
return;
host->chan_rx = dma_request_channel(mask, tmio_mmc_filter,
pdata->dma->chan_priv_rx);
dev_dbg(&host->pdev->dev, "%s: RX: got channel %p\n", __func__,
host->chan_rx);
if (!host->chan_rx)
goto ereqrx;
host->bounce_buf = (u8 *)__get_free_page(GFP_KERNEL | GFP_DMA);
if (!host->bounce_buf)
goto ebouncebuf;
tasklet_init(&host->dma_complete, tmio_mmc_tasklet_fn, (unsigned long)host);
tasklet_init(&host->dma_issue, tmio_mmc_issue_tasklet_fn, (unsigned long)host);
tmio_mmc_enable_dma(host, true);
return;
ebouncebuf:
dma_release_channel(host->chan_rx);
host->chan_rx = NULL;
ereqrx:
dma_release_channel(host->chan_tx);
host->chan_tx = NULL;
return;
}
}
void tmio_mmc_release_dma(struct tmio_mmc_host *host)
{
if (host->chan_tx) {
struct dma_chan *chan = host->chan_tx;
host->chan_tx = NULL;
dma_release_channel(chan);
}
if (host->chan_rx) {
struct dma_chan *chan = host->chan_rx;
host->chan_rx = NULL;
dma_release_channel(chan);
}
if (host->bounce_buf) {
free_pages((unsigned long)host->bounce_buf, 0);
host->bounce_buf = NULL;
}
}

897
drivers/mmc/host/tmio_mmc_pio.c Normal file
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@@ -0,0 +1,897 @@
/*
* 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/scatterlist.h>
#include <linux/workqueue.h>
#include <linux/spinlock.h>
#include "tmio_mmc.h"
static u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
{
return readw(host->ctl + (addr << host->bus_shift));
}
static void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
u16 *buf, int count)
{
readsw(host->ctl + (addr << host->bus_shift), buf, count);
}
static u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr)
{
return readw(host->ctl + (addr << host->bus_shift)) |
readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
}
static void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val)
{
writew(val, host->ctl + (addr << host->bus_shift));
}
static void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
u16 *buf, int count)
{
writesw(host->ctl + (addr << host->bus_shift), buf, count);
}
static void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val)
{
writew(val, host->ctl + (addr << host->bus_shift));
writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
}
void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
{
u32 mask = sd_ctrl_read32(host, CTL_IRQ_MASK) & ~(i & TMIO_MASK_IRQ);
sd_ctrl_write32(host, CTL_IRQ_MASK, mask);
}
void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
{
u32 mask = sd_ctrl_read32(host, CTL_IRQ_MASK) | (i & TMIO_MASK_IRQ);
sd_ctrl_write32(host, CTL_IRQ_MASK, 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;
printk(KERN_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;
sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001);
sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK,
(TMIO_SDIO_MASK_ALL & ~TMIO_SDIO_STAT_IOIRQ));
} else {
sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, TMIO_SDIO_MASK_ALL);
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;
/* request already finished */
if (!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->mrq = NULL;
host->force_pio = false;
spin_unlock_irqrestore(&host->lock, flags);
tmio_mmc_reset(host);
mmc_request_done(host->mmc, mrq);
}
static void tmio_mmc_finish_request(struct tmio_mmc_host *host)
{
struct mmc_request *mrq = host->mrq;
if (!mrq)
return;
host->mrq = NULL;
host->cmd = NULL;
host->data = NULL;
host->force_pio = false;
cancel_delayed_work(&host->delayed_reset_work);
mmc_request_done(host->mmc, mrq);
}
/* 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 doesnt 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();
}
tmio_mmc_finish_request(host);
}
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 {
tmio_mmc_finish_request(host);
}
out:
spin_unlock(&host->lock);
}
static irqreturn_t tmio_mmc_irq(int irq, void *devid)
{
struct tmio_mmc_host *host = devid;
struct tmio_mmc_data *pdata = host->pdata;
unsigned int ireg, irq_mask, status;
unsigned int sdio_ireg, sdio_irq_mask, sdio_status;
pr_debug("MMC IRQ begin\n");
status = sd_ctrl_read32(host, CTL_STATUS);
irq_mask = sd_ctrl_read32(host, CTL_IRQ_MASK);
ireg = status & TMIO_MASK_IRQ & ~irq_mask;
sdio_ireg = 0;
if (!ireg && pdata->flags & TMIO_MMC_SDIO_IRQ) {
sdio_status = sd_ctrl_read16(host, CTL_SDIO_STATUS);
sdio_irq_mask = sd_ctrl_read16(host, CTL_SDIO_IRQ_MASK);
sdio_ireg = sdio_status & TMIO_SDIO_MASK_ALL & ~sdio_irq_mask;
sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status & ~TMIO_SDIO_MASK_ALL);
if (sdio_ireg && !host->sdio_irq_enabled) {
pr_warning("tmio_mmc: Spurious SDIO IRQ, disabling! 0x%04x 0x%04x 0x%04x\n",
sdio_status, sdio_irq_mask, sdio_ireg);
tmio_mmc_enable_sdio_irq(host->mmc, 0);
goto out;
}
if (host->mmc->caps & MMC_CAP_SDIO_IRQ &&
sdio_ireg & TMIO_SDIO_STAT_IOIRQ)
mmc_signal_sdio_irq(host->mmc);
if (sdio_ireg)
goto out;
}
pr_debug_status(status);
pr_debug_status(ireg);
if (!ireg) {
tmio_mmc_disable_mmc_irqs(host, status & ~irq_mask);
pr_warning("tmio_mmc: Spurious irq, disabling! "
"0x%08x 0x%08x 0x%08x\n", status, irq_mask, ireg);
pr_debug_status(status);
goto out;
}
while (ireg) {
/* 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);
mmc_detect_change(host->mmc, msecs_to_jiffies(100));
}
/* CRC and other errors */
/* if (ireg & TMIO_STAT_ERR_IRQ)
* handled |= tmio_error_irq(host, irq, stat);
*/
/* 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);
}
/* 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);
}
/* Data transfer completion */
if (ireg & TMIO_STAT_DATAEND) {
tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_DATAEND);
tmio_mmc_data_irq(host);
}
/* Check status - keep going until we've handled it all */
status = sd_ctrl_read32(host, CTL_STATUS);
irq_mask = sd_ctrl_read32(host, CTL_IRQ_MASK);
ireg = status & TMIO_MASK_IRQ & ~irq_mask;
pr_debug("Status at end of loop: %08x\n", status);
pr_debug_status(status);
}
pr_debug("MMC IRQ end\n");
out:
return IRQ_HANDLED;
}
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);
int ret;
if (host->mrq)
pr_debug("request not null\n");
host->last_req_ts = jiffies;
wmb();
host->mrq = mrq;
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->mrq = NULL;
host->force_pio = false;
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);
if (ios->clock)
tmio_mmc_set_clock(host, ios->clock);
/* Power sequence - OFF -> UP -> ON */
if (ios->power_mode == MMC_POWER_OFF || !ios->clock) {
/* power down SD bus */
if (ios->power_mode == MMC_POWER_OFF && host->set_pwr)
host->set_pwr(host->pdev, 0);
tmio_mmc_clk_stop(host);
} else if (ios->power_mode == MMC_POWER_UP) {
/* power up SD bus */
if (host->set_pwr)
host->set_pwr(host->pdev, 1);
} else {
/* start bus clock */
tmio_mmc_clk_start(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);
}
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;
_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;
tmio_mmc_clk_stop(_host);
tmio_mmc_reset(_host);
ret = platform_get_irq(pdev, 0);
if (ret < 0)
goto unmap_ctl;
_host->irq = ret;
tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL);
if (pdata->flags & TMIO_MMC_SDIO_IRQ)
tmio_mmc_enable_sdio_irq(mmc, 0);
ret = request_irq(_host->irq, tmio_mmc_irq, IRQF_DISABLED |
IRQF_TRIGGER_FALLING, dev_name(&pdev->dev), _host);
if (ret)
goto unmap_ctl;
spin_lock_init(&_host->lock);
/* Init delayed work for request timeouts */
INIT_DELAYED_WORK(&_host->delayed_reset_work, tmio_mmc_reset_work);
/* See if we also get DMA */
tmio_mmc_request_dma(_host, pdata);
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;
unmap_ctl:
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)
{
mmc_remove_host(host->mmc);
cancel_delayed_work_sync(&host->delayed_reset_work);
tmio_mmc_release_dma(host);
free_irq(host->irq, host);
iounmap(host->ctl);
mmc_free_host(host->mmc);
}
EXPORT_SYMBOL(tmio_mmc_host_remove);
MODULE_LICENSE("GPL v2");

5
drivers/mmc/host/via-sdmmc.c
View File

@@ -1087,14 +1087,13 @@ static int __devinit via_sd_probe(struct pci_dev *pcidev,
struct mmc_host *mmc;
struct via_crdr_mmc_host *sdhost;
u32 base, len;
u8 rev, gatt;
u8 gatt;
int ret;
pci_read_config_byte(pcidev, PCI_CLASS_REVISION, &rev);
pr_info(DRV_NAME
": VIA SDMMC controller found at %s [%04x:%04x] (rev %x)\n",
pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device,
(int)rev);
(int)pcidev->revision);
ret = pci_enable_device(pcidev);
if (ret)