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@xxxxxxxxxxxxx>
---
drivers/mmc/host/sdhci-esdhc-imx.c | 40 ++++++++++++++++++++++++++++++-----
1 files changed, 34 insertions(+), 6 deletions(-)
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 3b52485..42f5687 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 IMX_GPIO_CD_WP (1 << 0)
+
+struct pltfm_imx_data {
+ int flags;
+ u32 mod_val;
+};
+
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 +42,15 @@ 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 =
+ (struct pltfm_imx_data *)pltfm_host->scratchpad;
+
/* 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 & IMX_GPIO_CD_WP))) {
struct esdhc_platform_data *boarddata =
host->mmc->parent->platform_data;
@@ -55,7 +68,12 @@ 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 =
+ (struct pltfm_imx_data *)pltfm_host->scratchpad;
+
+ if (unlikely((reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE)
+ && (imx_data->flags & IMX_GPIO_CD_WP)))
/*
* these interrupts won't work with a custom card_detect gpio
* (only applied to mx25/35)
@@ -76,6 +94,8 @@ 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 =
+ (struct pltfm_imx_data *)pltfm_host->scratchpad;
switch (reg) {
case SDHCI_TRANSFER_MODE:
@@ -83,10 +103,10 @@ 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->mod_val = val;
return;
case SDHCI_COMMAND:
- writel(val << 16 | pltfm_host->scratchpad,
+ writel(val << 16 | imx_data->mod_val,
host->ioaddr + SDHCI_TRANSFER_MODE);
return;
case SDHCI_BLOCK_SIZE:
@@ -146,7 +166,9 @@ 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 +190,10 @@ 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;
+
+ imx_data = kzalloc(sizeof(struct pltfm_imx_data), GFP_KERNEL);
+ pltfm_host->scratchpad = (u32)imx_data;
clk = clk_get(mmc_dev(host->mmc), NULL);
if (IS_ERR(clk)) {
@@ -214,8 +240,7 @@ 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 |= IMX_GPIO_CD_WP;
/* Now we have a working card_detect again */
host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
}
@@ -234,6 +259,8 @@ 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 =
+ (struct pltfm_imx_data *)pltfm_host->scratchpad;
if (boarddata && gpio_is_valid(boarddata->wp_gpio))
gpio_free(boarddata->wp_gpio);
@@ -247,6 +274,7 @@ 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 = {
--
1.7.1
--
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