-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 {
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