Subject: [PATCH 2/2] sdhci-pxa: add call back interface to share sdhci-pxa
Call back functions is added to support mmp2, pxa910, and pxa955
Signed-off-by: Zhangfei Gao <zhangfei....@marvell.com>
Signed-off-by: RaymondWu <x...@marvell.com>
Signed-off-by: Jun Nie <n...@marvell.com>
---
arch/arm/plat-pxa/include/plat/sdhci.h | 46 +++++++++++++++++
drivers/mmc/host/sdhci-pxa.c | 88 +++++++++++++++++++++-----------
2 files changed, 104 insertions(+), 30 deletions(-)
diff --git a/arch/arm/plat-pxa/include/plat/sdhci.h
b/arch/arm/plat-pxa/include/plat/sdhci.h
index 1ab332e..269dbe6 100644
--- a/arch/arm/plat-pxa/include/plat/sdhci.h
+++ b/arch/arm/plat-pxa/include/plat/sdhci.h
@@ -13,9 +13,14 @@
#ifndef __PLAT_PXA_SDHCI_H
#define __PLAT_PXA_SDHCI_H
+#include <linux/mmc/sdhci.h>
+#include <linux/platform_device.h>
+
/* pxa specific flag */
/* Require clock free running */
#define PXA_FLAG_DISABLE_CLOCK_GATING (1<<0)
+/* card alwayes wired to host, like on-chip emmc */
+#define PXA_FLAG_CARD_PERMANENT (1<<1)
/* Board design supports 8-bit data on SD/SDIO BUS */
#define PXA_FLAG_SD_8_BIT_CAPABLE_SLOT (1<<2)
@@ -23,13 +28,54 @@
/*
* struct pxa_sdhci_platdata() - Platform device data for PXA SDHCI
* @max_speed: the maximum speed supported
+ * @host_caps: Standard MMC host capabilities bit field.
* @quirks: quirks of specific device
* @flags: flags for platform requirement
+ * @clk_delay_cycles:
+ * mmp2: each step is roughly 100ps, 5bits width
+ * pxa910: each step is 1ns, 4bits width
+ * @clk_delay_enable: enable clk_delay or not, used on pxa910
+ * @clk_delay_sel: select clk_delay, used on pxa910
+ * 0: choose feedback clk
+ * 1: choose feedback clk + delay value
+ * 2: choose internal clk
+ * @ext_cd_gpio: gpio pin used for external CD line
+ * @ext_cd_gpio_invert: invert values for external CD gpio line
+ * @soc_set_timing: set timing for specific soc
+ * @ext_cd_init: Initialize external card detect subsystem
+ * @ext_cd_cleanup: Cleanup external card detect subsystem
+ * @soc_set_ops: overwrite host ops with soc specific ops
*/
+struct sdhci_pxa;
struct sdhci_pxa_platdata {
unsigned int max_speed;
+ unsigned int host_caps;
unsigned int quirks;
unsigned int flags;
+ unsigned int clk_delay_cycles;
+ unsigned int clk_delay_sel;
+ unsigned int ext_cd_gpio;
+ bool ext_cd_gpio_invert;
+ bool clk_delay_enable;
+
+ void (*soc_set_timing)(struct sdhci_host *host,
+ struct sdhci_pxa_platdata *pdata);
+ int (*ext_cd_init)(void (*notify_func)(struct platform_device *dev,
+ int state), void *data);
+ int (*ext_cd_cleanup)(void (*notify_func)(struct platform_device *dev,
+ int state), void *data);
+ void (*soc_set_ops)(struct sdhci_pxa *pxa);
+};
+
+struct sdhci_pxa {
+ struct sdhci_host *host;
+ struct sdhci_pxa_platdata *pdata;
+ struct clk *clk;
+ struct resource *res;
+ struct sdhci_ops *ops;
+
+ u8 clk_enable;
+ u8 power_mode;
};
#endif /* __PLAT_PXA_SDHCI_H */
diff --git a/drivers/mmc/host/sdhci-pxa.c b/drivers/mmc/host/sdhci-pxa.c
index 5a61208..4a1b7f7 100644
--- a/drivers/mmc/host/sdhci-pxa.c
+++ b/drivers/mmc/host/sdhci-pxa.c
@@ -24,32 +24,22 @@
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/err.h>
+#include <linux/slab.h>
#include <plat/sdhci.h>
#include "sdhci.h"
#define DRIVER_NAME "sdhci-pxa"
-#define SD_FIFO_PARAM 0x104
-#define DIS_PAD_SD_CLK_GATE 0x400
-
-struct sdhci_pxa {
- struct sdhci_host *host;
- struct sdhci_pxa_platdata *pdata;
- struct clk *clk;
- struct resource *res;
-
- u8 clk_enable;
-};
-
/*****************************************************************************\
* *
* SDHCI core callbacks *
* *
\*****************************************************************************/
+
static void set_clock(struct sdhci_host *host, unsigned int clock)
{
struct sdhci_pxa *pxa = sdhci_priv(host);
- u32 tmp = 0;
+ struct sdhci_pxa_platdata *pdata = pxa->pdata;
if (clock == 0) {
if (pxa->clk_enable) {
@@ -57,21 +47,31 @@ static void set_clock(struct sdhci_host *host,
unsigned int clock)
pxa->clk_enable = 0;
}
} else {
- if (0 == pxa->clk_enable) {
- if (pxa->pdata->flags & PXA_FLAG_DISABLE_CLOCK_GATING) {
- tmp = readl(host->ioaddr + SD_FIFO_PARAM);
- tmp |= DIS_PAD_SD_CLK_GATE;
- writel(tmp, host->ioaddr + SD_FIFO_PARAM);
- }
- clk_enable(pxa->clk);
- pxa->clk_enable = 1;
- }
+ if (pdata && pdata->soc_set_timing)
+ pdata->soc_set_timing(host, pdata);
+ clk_enable(pxa->clk);
+ pxa->clk_enable = 1;
}
}
-static struct sdhci_ops sdhci_pxa_ops = {
- .set_clock = set_clock,
-};
+static void sdhci_pxa_notify_change(struct platform_device *dev, int state)
+{
+ struct sdhci_host *host = platform_get_drvdata(dev);
+ unsigned long flags;
+
+ if (host) {
+ spin_lock_irqsave(&host->lock, flags);
+ if (state) {
+ dev_dbg(&dev->dev, "card inserted.\n");
+ host->flags &= ~SDHCI_DEVICE_DEAD;
+ } else {
+ dev_dbg(&dev->dev, "card removed.\n");
+ host->flags |= SDHCI_DEVICE_DEAD;
+ }
+ tasklet_schedule(&host->card_tasklet);
+ spin_unlock_irqrestore(&host->lock, flags);
+ }
+}
/*****************************************************************************\
* *
@@ -111,6 +111,12 @@ static int __devinit sdhci_pxa_probe(struct
platform_device *pdev)
pxa->pdata = pdata;
pxa->clk_enable = 0;
+ pxa->ops = kzalloc(sizeof(struct sdhci_ops), GFP_KERNEL);
+ if (!pxa->ops) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
pxa->clk = clk_get(dev, "PXA-SDHCLK");
if (IS_ERR(pxa->clk)) {
dev_err(dev, "failed to get io clock\n");
@@ -134,32 +140,49 @@ static int __devinit sdhci_pxa_probe(struct
platform_device *pdev)
}
host->hw_name = "MMC";
- host->ops = &sdhci_pxa_ops;
host->irq = irq;
- host->quirks = SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
+ host->quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
+
+ if (pdata && pdata->flags & PXA_FLAG_CARD_PERMANENT) {
+ /* on-chip device */
+ host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
+ host->mmc->caps |= MMC_CAP_NONREMOVABLE;
+ }
- if (pdata->quirks)
+ if (pdata && pdata->quirks)
host->quirks |= pdata->quirks;
/* If slot design supports 8 bit data, indicate this to MMC. */
if (pdata->flags & PXA_FLAG_SD_8_BIT_CAPABLE_SLOT)
host->mmc->caps |= MMC_CAP_8_BIT_DATA;
+ if (pdata && pdata->host_caps)
+ host->mmc->caps |= pdata->host_caps;
+
+ if (pdata && pdata->soc_set_ops)
+ pdata->soc_set_ops(pxa);
+
+ pxa->ops->set_clock = set_clock;
+ host->ops = pxa->ops;
+
ret = sdhci_add_host(host);
if (ret) {
dev_err(&pdev->dev, "failed to add host\n");
goto out;
}
- if (pxa->pdata->max_speed)
- host->mmc->f_max = pxa->pdata->max_speed;
+ if (pdata && pdata->max_speed)
+ host->mmc->f_max = pdata->max_speed;
+ if (pdata && pdata->ext_cd_init)
+ pdata->ext_cd_init(&sdhci_pxa_notify_change, pdata);
platform_set_drvdata(pdev, host);
return 0;
out:
if (host) {
clk_put(pxa->clk);
+ kfree(pxa->ops);
if (host->ioaddr)
iounmap(host->ioaddr);
if (pxa->res)
@@ -173,18 +196,23 @@ out:
static int __devexit sdhci_pxa_remove(struct platform_device *pdev)
{
+ struct sdhci_pxa_platdata *pdata = pdev->dev.platform_data;
struct sdhci_host *host = platform_get_drvdata(pdev);
struct sdhci_pxa *pxa = sdhci_priv(host);
int dead = 0;
u32 scratch;
if (host) {
+ if (pdata && pdata->ext_cd_cleanup)
+ pdata->ext_cd_cleanup(&sdhci_pxa_notify_change, pdata);
+
scratch = readl(host->ioaddr + SDHCI_INT_STATUS);
if (scratch == (u32)-1)
dead = 1;
sdhci_remove_host(host, dead);
+ kfree(pxa->ops);
if (host->ioaddr)
iounmap(host->ioaddr);
if (pxa->res)
--
1.7.0.4
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