hurricos/openwrt-mirror
1
0
Fork 0
mirror of git://git.openwrt.org/openwrt/openwrt.git synced 2025-10-30 21:44:27 -04:00
Code Issues Projects Releases Wiki Activity
9a1031ce6d
openwrt-mirror/target/linux/goldfish/patches-2.6.30/0095-mmc-Add-concept-of-an-embedded-SDIO-device.patch

275 lines
7.4 KiB
Diff
Raw Blame History

From 62d51f0d0d0b3c758b4505c3855b61288b8e90aa Mon Sep 17 00:00:00 2001
From: San Mehat <san@android.com>
Date: Mon, 14 Apr 2008 15:22:49 -0700
Subject: [PATCH 095/134] mmc: Add concept of an 'embedded' SDIO device.
This is required to support chips which use SDIO for signaling/
communication but do not implement the various card enumeration registers
as required for full SD / SDIO cards.
mmc: sdio: Fix bug where we're freeing the CIS tables we never allocated when using EMBEDDED_SDIO
mmc: Add max_blksize to embedded SDIO data
Signed-off-by: San Mehat <san@google.com>
---
arch/arm/include/asm/mach/mmc.h | 10 ++++++
drivers/mmc/core/Kconfig | 10 +++++-
drivers/mmc/core/core.c | 16 +++++++++
drivers/mmc/core/sdio.c | 67 ++++++++++++++++++++++++++++++++-------
drivers/mmc/core/sdio_bus.c | 13 +++++++-
include/linux/mmc/host.h | 17 ++++++++++
include/linux/mmc/sdio_func.h | 8 +++++
7 files changed, 127 insertions(+), 14 deletions(-)
--- a/arch/arm/include/asm/mach/mmc.h
+++ b/arch/arm/include/asm/mach/mmc.h
@@ -5,12 +5,22 @@
#define ASMARM_MACH_MMC_H
#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/sdio_func.h>
+
+struct embedded_sdio_data {
+ struct sdio_cis cis;
+ struct sdio_cccr cccr;
+ struct sdio_embedded_func *funcs;
+ int num_funcs;
+};
struct mmc_platform_data {
unsigned int ocr_mask; /* available voltages */
u32 (*translate_vdd)(struct device *, unsigned int);
unsigned int (*status)(struct device *);
unsigned int status_irq;
+ struct embedded_sdio_data *embedded_sdio;
int (*register_status_notify)(void (*callback)(int card_present, void *dev_id), void *dev_id);
};
--- a/drivers/mmc/core/Kconfig
+++ b/drivers/mmc/core/Kconfig
@@ -14,11 +14,19 @@ config MMC_UNSAFE_RESUME
This option is usually just for embedded systems which use
a MMC/SD card for rootfs. Most people should say N here.
+config MMC_EMBEDDED_SDIO
+ boolean "MMC embedded SDIO device support (EXPERIMENTAL)"
+ depends on EXPERIMENTAL
+ help
+ If you say Y here, support will be added for embedded SDIO
+ devices which do not contain the necessary enumeration
+ support in hardware to be properly detected.
+
config MMC_PARANOID_SD_INIT
bool "Enable paranoid SD card initialization (EXPERIMENTAL)"
+ depends on EXPERIMENTAL
help
If you say Y here, the MMC layer will be extra paranoid
about re-trying SD init requests. This can be a useful
work-around for buggy controllers and hardware. Enable
if you are experiencing issues with SD detection.
-
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1011,6 +1011,22 @@ EXPORT_SYMBOL(mmc_resume_host);
#endif
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+void mmc_set_embedded_sdio_data(struct mmc_host *host,
+ struct sdio_cis *cis,
+ struct sdio_cccr *cccr,
+ struct sdio_embedded_func *funcs,
+ int num_funcs)
+{
+ host->embedded_sdio_data.cis = cis;
+ host->embedded_sdio_data.cccr = cccr;
+ host->embedded_sdio_data.funcs = funcs;
+ host->embedded_sdio_data.num_funcs = num_funcs;
+}
+
+EXPORT_SYMBOL(mmc_set_embedded_sdio_data);
+#endif
+
static int __init mmc_init(void)
{
int ret;
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -24,6 +24,10 @@
#include "sdio_ops.h"
#include "sdio_cis.h"
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+#include <linux/mmc/sdio_ids.h>
+#endif
+
static int sdio_read_fbr(struct sdio_func *func)
{
int ret;
@@ -314,6 +318,11 @@ int mmc_attach_sdio(struct mmc_host *hos
*/
funcs = (ocr & 0x70000000) >> 28;
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+ if (host->embedded_sdio_data.funcs)
+ funcs = host->embedded_sdio_data.num_funcs;
+#endif
+
/*
* Allocate card structure.
*/
@@ -351,17 +360,33 @@ int mmc_attach_sdio(struct mmc_host *hos
/*
* Read the common registers.
*/
- err = sdio_read_cccr(card);
- if (err)
- goto remove;
- /*
- * Read the common CIS tuples.
- */
- err = sdio_read_common_cis(card);
- if (err)
- goto remove;
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+ if (host->embedded_sdio_data.cccr)
+ memcpy(&card->cccr, host->embedded_sdio_data.cccr, sizeof(struct sdio_cccr));
+ else {
+#endif
+ err = sdio_read_cccr(card);
+ if (err)
+ goto remove;
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+ }
+#endif
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+ if (host->embedded_sdio_data.cis)
+ memcpy(&card->cis, host->embedded_sdio_data.cis, sizeof(struct sdio_cis));
+ else {
+#endif
+ /*
+ * Read the common CIS tuples.
+ */
+ err = sdio_read_common_cis(card);
+ if (err)
+ goto remove;
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+ }
+#endif
/*
* Switch to high-speed (if supported).
*/
@@ -395,9 +420,27 @@ int mmc_attach_sdio(struct mmc_host *hos
* Initialize (but don't add) all present functions.
*/
for (i = 0;i < funcs;i++) {
- err = sdio_init_func(host->card, i + 1);
- if (err)
- goto remove;
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+ if (host->embedded_sdio_data.funcs) {
+ struct sdio_func *tmp;
+
+ tmp = sdio_alloc_func(host->card);
+ if (IS_ERR(tmp))
+ goto remove;
+ tmp->num = (i + 1);
+ card->sdio_func[i] = tmp;
+ tmp->class = host->embedded_sdio_data.funcs[i].f_class;
+ tmp->max_blksize = host->embedded_sdio_data.funcs[i].f_maxblksize;
+ tmp->vendor = card->cis.vendor;
+ tmp->device = card->cis.device;
+ } else {
+#endif
+ err = sdio_init_func(host->card, i + 1);
+ if (err)
+ goto remove;
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+ }
+#endif
}
mmc_release_host(host);
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -20,6 +20,10 @@
#include "sdio_cis.h"
#include "sdio_bus.h"
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+#include <linux/mmc/host.h>
+#endif
+
#define dev_to_sdio_func(d) container_of(d, struct sdio_func, dev)
#define to_sdio_driver(d) container_of(d, struct sdio_driver, drv)
@@ -202,7 +206,14 @@ static void sdio_release_func(struct dev
{
struct sdio_func *func = dev_to_sdio_func(dev);
- sdio_free_func_cis(func);
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+ /*
+ * If this device is embedded then we never allocated
+ * cis tables for this func
+ */
+ if (!func->card->host->embedded_sdio_data.funcs)
+#endif
+ sdio_free_func_cis(func);
if (func->info)
kfree(func->info);
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -161,6 +161,15 @@ struct mmc_host {
struct dentry *debugfs_root;
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+ struct {
+ struct sdio_cis *cis;
+ struct sdio_cccr *cccr;
+ struct sdio_embedded_func *funcs;
+ int num_funcs;
+ } embedded_sdio_data;
+#endif
+
unsigned long private[0] ____cacheline_aligned;
};
@@ -169,6 +178,14 @@ extern int mmc_add_host(struct mmc_host
extern void mmc_remove_host(struct mmc_host *);
extern void mmc_free_host(struct mmc_host *);
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+extern void mmc_set_embedded_sdio_data(struct mmc_host *host,
+ struct sdio_cis *cis,
+ struct sdio_cccr *cccr,
+ struct sdio_embedded_func *funcs,
+ int num_funcs);
+#endif
+
static inline void *mmc_priv(struct mmc_host *host)
{
return (void *)host->private;
--- a/include/linux/mmc/sdio_func.h
+++ b/include/linux/mmc/sdio_func.h
@@ -21,6 +21,14 @@ struct sdio_func;
typedef void (sdio_irq_handler_t)(struct sdio_func *);
/*
+ * Structure used to hold embedded SDIO device data from platform layer
+ */
+struct sdio_embedded_func {
+ uint8_t f_class;
+ uint32_t f_maxblksize;
+};
+
+/*
* SDIO function CIS tuple (unknown to the core)
*/
struct sdio_func_tuple {
Reference in New Issue View Git Blame Copy Permalink