* [PATCH V8 3/4] mmc: sdhci-esdhc: make the writel/readl as the general APIs
2011-03-25 3:39 [PATCH V8 1/4] mmc: sdhci-esdhc: remove SDHCI_QUIRK_NO_CARD_NO_RESET from ESDHC_DEFAULT_QUIRKS Richard Zhu
2011-03-25 3:39 ` [PATCH V8 2/4] mmc: add the abort CMDTYE bits definition Richard Zhu
@ 2011-03-25 3:39 ` Richard Zhu
2011-03-25 8:53 ` Wolfram Sang
2011-03-25 3:39 ` [PATCH V8 4/4] mmc: sdhci-esdhc: enable esdhc on imx53 Richard Zhu
2011-03-25 13:17 ` [PATCH V8 1/4] mmc: sdhci-esdhc: remove SDHCI_QUIRK_NO_CARD_NO_RESET from ESDHC_DEFAULT_QUIRKS Chris Ball
3 siblings, 1 reply; 9+ messages in thread
From: Richard Zhu @ 2011-03-25 3:39 UTC (permalink / raw)
To: linux-arm-kernel
Add one flag to indicate the GPIO CD/WP is enabled or not
on imx platforms, and reuse the writel/readl as the general
APIs for imx SOCs.
Signed-off-by: Richard Zhu <Hong-Xing.Zhu@freescale.com>
---
drivers/mmc/host/sdhci-esdhc-imx.c | 44 ++++++++++++++++++++++++++++++-----
drivers/mmc/host/sdhci-pltfm.h | 2 +-
2 files changed, 38 insertions(+), 8 deletions(-)
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 3b52485..67a2da9 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -16,6 +16,7 @@
#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 <mach/hardware.h>
@@ -24,6 +25,13 @@
#include "sdhci-pltfm.h"
#include "sdhci-esdhc.h"
+#define ESDHC_FLAG_GPIO_FOR_CD_WP (1 << 0)
+
+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 +42,14 @@ 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;
@@ -55,7 +67,11 @@ 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)
@@ -76,6 +92,7 @@ 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 +100,10 @@ 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;
+ imx_data->scratchpad = val;
return;
case SDHCI_COMMAND:
- writel(val << 16 | pltfm_host->scratchpad,
+ writel(val << 16 | imx_data->scratchpad,
host->ioaddr + SDHCI_TRANSFER_MODE);
return;
case SDHCI_BLOCK_SIZE:
@@ -146,7 +163,9 @@ 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 +187,7 @@ 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 +197,15 @@ 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()) {
@@ -214,8 +242,7 @@ 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 +254,7 @@ 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 +262,7 @@ 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 +276,7 @@ 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 = {
diff --git a/drivers/mmc/host/sdhci-pltfm.h b/drivers/mmc/host/sdhci-pltfm.h
index ea2e44d..2b37016 100644
--- a/drivers/mmc/host/sdhci-pltfm.h
+++ b/drivers/mmc/host/sdhci-pltfm.h
@@ -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;
--
1.7.1
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH V8 4/4] mmc: sdhci-esdhc: enable esdhc on imx53
2011-03-25 3:39 [PATCH V8 1/4] mmc: sdhci-esdhc: remove SDHCI_QUIRK_NO_CARD_NO_RESET from ESDHC_DEFAULT_QUIRKS Richard Zhu
2011-03-25 3:39 ` [PATCH V8 2/4] mmc: add the abort CMDTYE bits definition Richard Zhu
2011-03-25 3:39 ` [PATCH V8 3/4] mmc: sdhci-esdhc: make the writel/readl as the general APIs Richard Zhu
@ 2011-03-25 3:39 ` Richard Zhu
2011-03-25 9:00 ` Wolfram Sang
2011-03-25 13:17 ` [PATCH V8 1/4] mmc: sdhci-esdhc: remove SDHCI_QUIRK_NO_CARD_NO_RESET from ESDHC_DEFAULT_QUIRKS Chris Ball
3 siblings, 1 reply; 9+ messages in thread
From: Richard Zhu @ 2011-03-25 3:39 UTC (permalink / raw)
To: linux-arm-kernel
Fix the NO INT in the Multi-BLK IO in SD/MMC, and Multi-BLK
read in SDIO on imx53.
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 one 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 on
imx53.
As a result, the TC flag is not asserted and SW received timeout
exeception. set bit1 of Vendor Spec registor to fix it.
Signed-off-by: Richard Zhu <Hong-Xing.Zhu@freescale.com>
Signed-off-by: Richard Zhao <richard.zhao@freescale.com>
---
drivers/mmc/host/sdhci-esdhc-imx.c | 42 ++++++++++++++++++++++++++++++++++++
1 files changed, 42 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 67a2da9..a19967d 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -19,13 +19,31 @@
#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@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;
@@ -78,6 +96,15 @@ static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
*/
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);
}
@@ -100,9 +127,21 @@ 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.
*/
+ 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:
+ 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;
@@ -215,6 +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) {
--
1.7.1
^ permalink raw reply related [flat|nested] 9+ messages in thread