wl1251: add sdio support

This adds the wl1251_sdio module, enabling the SDIO interface for
wl1251, as used by the Google G1 phone and others.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 200 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/Kconfig b/drivers/net/wireless/wl12xx/Kconfig
index f8cb8b864ad2..7b14d5bc63d6 100644
--- a/drivers/net/wireless/wl12xx/Kconfig
+++ b/drivers/net/wireless/wl12xx/Kconfig
@@ -28,6 +28,17 @@ config WL1251_SPI
           If you choose to build a module, it'll be called wl1251_spi.
           Say N if unsure.
 
+config WL1251_SDIO
+        tristate "TI wl1251 SDIO support"
+        depends on WL1251 && MMC
+        ---help---
+          This module adds support for the SDIO interface of adapters using
+          TI wl1251 chipset.  Select this if your platform is using
+          the SDIO bus.
+
+          If you choose to build a module, it'll be called
+          wl1251_sdio. Say N if unsure.
+
 config WL1271
         tristate "TI wl1271 support"
         depends on WL12XX && SPI_MASTER && GENERIC_HARDIRQS
diff --git a/drivers/net/wireless/wl12xx/Makefile b/drivers/net/wireless/wl12xx/Makefile
index ea0477f1d1da..207e85274bc3 100644
--- a/drivers/net/wireless/wl12xx/Makefile
+++ b/drivers/net/wireless/wl12xx/Makefile
@@ -5,6 +5,7 @@ wl1251-objs		= wl1251_main.o wl1251_event.o \
 
 obj-$(CONFIG_WL1251)    += wl1251.o
 obj-$(CONFIG_WL1251_SPI)        += wl1251_spi.o
+obj-$(CONFIG_WL1251_SDIO)       += wl1251_sdio.o
 
 wl1271-objs             = wl1271_main.o  wl1271_spi.o wl1271_cmd.o  \
                           wl1271_event.o wl1271_tx.o  wl1271_rx.o   \
diff --git a/drivers/net/wireless/wl12xx/wl1251_sdio.c b/drivers/net/wireless/wl12xx/wl1251_sdio.c
new file mode 100644
index 000000000000..f1d9e76e0484
--- /dev/null
+++ b/drivers/net/wireless/wl12xx/wl1251_sdio.c
@@ -0,0 +1,188 @@
+/*
+ * wl12xx SDIO routines
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ * Copyright (C) 2005 Texas Instruments Incorporated
+ * Copyright (C) 2008 Google Inc
+ * Copyright (C) 2009 Bob Copeland (me@bobcopeland.com)
+ */
+#include <linux/module.h>
+#include <linux/crc7.h>
+#include <linux/mod_devicetable.h>
+#include <linux/irq.h>
+#include <linux/mmc/sdio_func.h>
+#include <linux/mmc/sdio_ids.h>
+#include <linux/platform_device.h>
+
+#include "wl1251.h"
+#include "wl12xx_80211.h"
+#include "reg.h"
+#include "wl1251_ps.h"
+#include "wl1251_io.h"
+#include "wl1251_tx.h"
+#include "wl1251_debugfs.h"
+
+#ifndef SDIO_VENDOR_ID_TI
+#define SDIO_VENDOR_ID_TI               0x104c
+#endif
+
+#ifndef SDIO_DEVICE_ID_TI_WL1251
+#define SDIO_DEVICE_ID_TI_WL1251        0x9066
+#endif
+
+static struct sdio_func *wl_to_func(struct wl1251 *wl)
+{
+        return wl->if_priv;
+}
+
+static void wl1251_sdio_interrupt(struct sdio_func *func)
+{
+        wl1251_irq(0, sdio_get_drvdata(func));
+}
+
+static const struct sdio_device_id wl1251_devices[] = {
+        { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1251) },
+        {}
+};
+MODULE_DEVICE_TABLE(sdio, wl1251_devices);
+
+
+void wl1251_sdio_read(struct wl1251 *wl, int addr, void *buf, size_t len)
+{
+        int ret;
+        struct sdio_func *func = wl_to_func(wl);
+
+        sdio_claim_host(func);
+        ret = sdio_memcpy_fromio(func, buf, addr, len);
+        if (ret)
+                wl1251_error("sdio read failed (%d)", ret);
+        sdio_release_host(func);
+}
+
+void wl1251_sdio_write(struct wl1251 *wl, int addr, void *buf, size_t len)
+{
+        int ret;
+        struct sdio_func *func = wl_to_func(wl);
+
+        sdio_claim_host(func);
+        ret = sdio_memcpy_toio(func, addr, buf, len);
+        if (ret)
+                wl1251_error("sdio write failed (%d)", ret);
+        sdio_release_host(func);
+}
+
+void wl1251_sdio_reset(struct wl1251 *wl)
+{
+}
+
+void wl1251_sdio_set_power(bool enable)
+{
+}
+
+struct wl1251_if_operations wl1251_sdio_ops = {
+        .read = wl1251_sdio_read,
+        .write = wl1251_sdio_write,
+        .reset = wl1251_sdio_reset,
+};
+
+int wl1251_sdio_probe(struct sdio_func *func, const struct sdio_device_id *id)
+{
+        int ret;
+        struct wl1251 *wl;
+        struct ieee80211_hw *hw;
+
+        hw = wl1251_alloc_hw();
+        if (IS_ERR(hw))
+                return PTR_ERR(hw);
+
+        wl = hw->priv;
+
+        sdio_claim_host(func);
+        ret = sdio_enable_func(func);
+        if (ret)
+                goto release;
+
+        sdio_set_block_size(func, 512);
+
+        SET_IEEE80211_DEV(hw, &func->dev);
+        wl->if_priv = func;
+        wl->if_ops = &wl1251_sdio_ops;
+        wl->set_power = wl1251_sdio_set_power;
+
+        sdio_release_host(func);
+        ret = wl1251_init_ieee80211(wl);
+        sdio_claim_host(func);
+        if (ret)
+                goto disable;
+
+        ret = sdio_claim_irq(func, wl1251_sdio_interrupt);
+        if (ret)
+                goto no_irq;
+
+        sdio_release_host(func);
+        sdio_set_drvdata(func, wl);
+        return ret;
+
+no_irq:
+        wl1251_free_hw(wl);
+disable:
+        sdio_disable_func(func);
+release:
+        sdio_release_host(func);
+        return ret;
+}
+
+static void __devexit wl1251_sdio_remove(struct sdio_func *func)
+{
+        struct wl1251 *wl = sdio_get_drvdata(func);
+
+        wl1251_free_hw(wl);
+
+        sdio_claim_host(func);
+        sdio_release_irq(func);
+        sdio_disable_func(func);
+        sdio_release_host(func);
+}
+
+static struct sdio_driver wl1251_sdio_driver = {
+        .name           = "wl1251_sdio",
+        .id_table       = wl1251_devices,
+        .probe          = wl1251_sdio_probe,
+        .remove         = __devexit_p(wl1251_sdio_remove),
+};
+
+static int __init wl1251_sdio_init(void)
+{
+        int err;
+
+        err = sdio_register_driver(&wl1251_sdio_driver);
+        if (err)
+                wl1251_error("failed to register sdio driver: %d", err);
+        return err;
+}
+
+static void __exit wl1251_sdio_exit(void)
+{
+        sdio_unregister_driver(&wl1251_sdio_driver);
+        wl1251_notice("unloaded");
+}
+
+module_init(wl1251_sdio_init);
+module_exit(wl1251_sdio_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Kalle Valo <Kalle.Valo@nokia.com>");
+MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");