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Subject[PATCH V2 3/4] mmc: sdhci-pci: add platform data
Date
Add a means of getting platform data for the SDHCI PCI
devices. The data is stored against the slot not the
device in order to support multi-slot devices.

The data allows platform-specific setup (such as getting
GPIO numbers from firmware or setting up wl12xx for SDIO)
to be done in platform support files instead of the
sdhci-pci driver.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
drivers/Makefile | 2 +-
drivers/mmc/Makefile | 3 +--
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/sdhci-pci-data.c | 5 +++++
drivers/mmc/host/sdhci-pci.c | 32 ++++++++++++++++++++++++++++----
include/linux/mmc/sdhci-pci-data.h | 18 ++++++++++++++++++
6 files changed, 54 insertions(+), 7 deletions(-)
create mode 100644 drivers/mmc/host/sdhci-pci-data.c
create mode 100644 include/linux/mmc/sdhci-pci-data.h

diff --git a/drivers/Makefile b/drivers/Makefile
index 7fa433a..fe621d9 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -95,7 +95,7 @@ obj-$(CONFIG_EISA) += eisa/
obj-y += lguest/
obj-$(CONFIG_CPU_FREQ) += cpufreq/
obj-$(CONFIG_CPU_IDLE) += cpuidle/
-obj-$(CONFIG_MMC) += mmc/
+obj-y += mmc/
obj-$(CONFIG_MEMSTICK) += memstick/
obj-y += leds/
obj-$(CONFIG_INFINIBAND) += infiniband/
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 12eef39..400756e 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -6,5 +6,4 @@ subdir-ccflags-$(CONFIG_MMC_DEBUG) := -DDEBUG

obj-$(CONFIG_MMC) += core/
obj-$(CONFIG_MMC) += card/
-obj-$(CONFIG_MMC) += host/
-
+obj-$(subst m,y,$(CONFIG_MMC)) += host/
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index b4b83f3..745f8fc 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_MMC_MXC) += mxcmmc.o
obj-$(CONFIG_MMC_MXS) += mxs-mmc.o
obj-$(CONFIG_MMC_SDHCI) += sdhci.o
obj-$(CONFIG_MMC_SDHCI_PCI) += sdhci-pci.o
+obj-$(subst m,y,$(CONFIG_MMC_SDHCI_PCI)) += sdhci-pci-data.o
obj-$(CONFIG_MMC_SDHCI_PXAV3) += sdhci-pxav3.o
obj-$(CONFIG_MMC_SDHCI_PXAV2) += sdhci-pxav2.o
obj-$(CONFIG_MMC_SDHCI_S3C) += sdhci-s3c.o
diff --git a/drivers/mmc/host/sdhci-pci-data.c b/drivers/mmc/host/sdhci-pci-data.c
new file mode 100644
index 0000000..a611217
--- /dev/null
+++ b/drivers/mmc/host/sdhci-pci-data.c
@@ -0,0 +1,5 @@
+#include <linux/module.h>
+#include <linux/mmc/sdhci-pci-data.h>
+
+struct sdhci_pci_data *(*sdhci_pci_get_data)(struct pci_dev *pdev, int slotno);
+EXPORT_SYMBOL_GPL(sdhci_pci_get_data);
diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index d833d9c..9d1874a 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -25,6 +25,7 @@
#include <linux/gpio.h>
#include <linux/sfi.h>
#include <linux/pm_runtime.h>
+#include <linux/mmc/sdhci-pci-data.h>

#include "sdhci.h"

@@ -62,6 +63,7 @@ struct sdhci_pci_fixes {
struct sdhci_pci_slot {
struct sdhci_pci_chip *chip;
struct sdhci_host *host;
+ struct sdhci_pci_data *data;

int pci_bar;
int rst_n_gpio;
@@ -1188,11 +1190,12 @@ static const struct dev_pm_ops sdhci_pci_pm_ops = {
\*****************************************************************************/

static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
- struct pci_dev *pdev, struct sdhci_pci_chip *chip, int bar)
+ struct pci_dev *pdev, struct sdhci_pci_chip *chip, int first_bar,
+ int slotno)
{
struct sdhci_pci_slot *slot;
struct sdhci_host *host;
- int ret;
+ int ret, bar = first_bar + slotno;

if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) {
dev_err(&pdev->dev, "BAR %d is not iomem. Aborting.\n", bar);
@@ -1227,6 +1230,20 @@ static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
slot->pci_bar = bar;
slot->rst_n_gpio = -EINVAL;

+ /* Retrieve platform data if there is any */
+ if (*sdhci_pci_get_data)
+ slot->data = sdhci_pci_get_data(pdev, slotno);
+
+ if (slot->data) {
+ if (slot->data->setup) {
+ ret = slot->data->setup(slot->data);
+ if (ret) {
+ dev_err(&pdev->dev, "platform setup failed\n");
+ goto free;
+ }
+ }
+ }
+
host->hw_name = "PCI";
host->ops = &sdhci_pci_ops;
host->quirks = chip->quirks;
@@ -1236,7 +1253,7 @@ static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
ret = pci_request_region(pdev, bar, mmc_hostname(host->mmc));
if (ret) {
dev_err(&pdev->dev, "cannot request region\n");
- goto free;
+ goto cleanup;
}

host->ioaddr = pci_ioremap_bar(pdev, bar);
@@ -1270,6 +1287,10 @@ unmap:
release:
pci_release_region(pdev, bar);

+cleanup:
+ if (slot->data && slot->data->cleanup)
+ slot->data->cleanup(slot->data);
+
free:
sdhci_free_host(host);

@@ -1291,6 +1312,9 @@ static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
if (slot->chip->fixes && slot->chip->fixes->remove_slot)
slot->chip->fixes->remove_slot(slot, dead);

+ if (slot->data && slot->data->cleanup)
+ slot->data->cleanup(slot->data);
+
pci_release_region(slot->chip->pdev, slot->pci_bar);

sdhci_free_host(slot->host);
@@ -1377,7 +1401,7 @@ static int __devinit sdhci_pci_probe(struct pci_dev *pdev,
slots = chip->num_slots; /* Quirk may have changed this */

for (i = 0; i < slots; i++) {
- slot = sdhci_pci_probe_slot(pdev, chip, first_bar + i);
+ slot = sdhci_pci_probe_slot(pdev, chip, first_bar, i);
if (IS_ERR(slot)) {
for (i--; i >= 0; i--)
sdhci_pci_remove_slot(chip->slots[i]);
diff --git a/include/linux/mmc/sdhci-pci-data.h b/include/linux/mmc/sdhci-pci-data.h
new file mode 100644
index 0000000..8959604
--- /dev/null
+++ b/include/linux/mmc/sdhci-pci-data.h
@@ -0,0 +1,18 @@
+#ifndef LINUX_MMC_SDHCI_PCI_DATA_H
+#define LINUX_MMC_SDHCI_PCI_DATA_H
+
+struct pci_dev;
+
+struct sdhci_pci_data {
+ struct pci_dev *pdev;
+ int slotno;
+ int rst_n_gpio; /* Set to -EINVAL if unused */
+ int cd_gpio; /* Set to -EINVAL if unused */
+ int (*setup)(struct sdhci_pci_data *data);
+ void (*cleanup)(struct sdhci_pci_data *data);
+};
+
+extern struct sdhci_pci_data *(*sdhci_pci_get_data)(struct pci_dev *pdev,
+ int slotno);
+
+#endif
--
1.7.6.4


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