wl1271: Initial SDIO implementation

Added initial implementation of SDIO interfacte to the wl1271 driver.
When selected, this adds new module called "wl1271_sdio".

Signed-off-by: Teemu Paasikivi <ext-teemu.3.paasikivi@nokia.com>
Reviewed-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 315 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/Kconfig b/drivers/net/wireless/wl12xx/Kconfig
index 9c6fdccf00f1..2f6733526f7f 100644
--- a/drivers/net/wireless/wl12xx/Kconfig
+++ b/drivers/net/wireless/wl12xx/Kconfig
@@ -63,3 +63,15 @@ config WL1271_SPI
           If you choose to build a module, it'll be called wl1251_spi.
           Say N if unsure.
 
+config WL1271_SDIO
+        tristate "TI wl1271 SDIO support"
+        depends on WL1271 && MMC
+        ---help---
+          This module adds support for the SDIO interface of adapters using
+          TI wl1271 chipset.  Select this if your platform is using
+          the SDIO bus.
+
+          If you choose to build a module, it'll be called
+          wl1271_sdio. Say N if unsure.
+
+
diff --git a/drivers/net/wireless/wl12xx/Makefile b/drivers/net/wireless/wl12xx/Makefile
index 473a1e287997..27ddd2be0a91 100644
--- a/drivers/net/wireless/wl12xx/Makefile
+++ b/drivers/net/wireless/wl12xx/Makefile
@@ -15,3 +15,4 @@ wl1271-objs		= wl1271_main.o  wl1271_cmd.o wl1271_io.o \
 wl1271-$(CONFIG_NL80211_TESTMODE)       += wl1271_testmode.o
 obj-$(CONFIG_WL1271)    += wl1271.o
 obj-$(CONFIG_WL1271_SPI)        += wl1271_spi.o
+obj-$(CONFIG_WL1271_SDIO)       += wl1271_sdio.o
diff --git a/drivers/net/wireless/wl12xx/wl1271_sdio.c b/drivers/net/wireless/wl12xx/wl1271_sdio.c
new file mode 100644
index 000000000000..be5c14935bc3
--- /dev/null
+++ b/drivers/net/wireless/wl12xx/wl1271_sdio.c
@@ -0,0 +1,302 @@
+/*
+ * This file is part of wl1271
+ *
+ * Copyright (C) 2009-2010 Nokia Corporation
+ *
+ * Contact: Luciano Coelho <luciano.coelho@nokia.com>
+ *
+ * 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
+ *
+ */
+
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/crc7.h>
+#include <linux/vmalloc.h>
+#include <linux/mmc/sdio_func.h>
+#include <linux/mmc/sdio_ids.h>
+#include <linux/mmc/card.h>
+#include <plat/gpio.h>
+
+#include "wl1271.h"
+#include "wl12xx_80211.h"
+#include "wl1271_io.h"
+
+
+#define RX71_WL1271_IRQ_GPIO            42
+
+#ifndef SDIO_VENDOR_ID_TI
+#define SDIO_VENDOR_ID_TI               0x0097
+#endif
+
+#ifndef SDIO_DEVICE_ID_TI_WL1271
+#define SDIO_DEVICE_ID_TI_WL1271        0x4076
+#endif
+
+static const struct sdio_device_id wl1271_devices[] = {
+        { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
+        {}
+};
+MODULE_DEVICE_TABLE(sdio, wl1271_devices);
+
+static inline struct sdio_func *wl_to_func(struct wl1271 *wl)
+{
+        return wl->if_priv;
+}
+
+static struct device *wl1271_sdio_wl_to_dev(struct wl1271 *wl)
+{
+        return &(wl_to_func(wl)->dev);
+}
+
+static irqreturn_t wl1271_irq(int irq, void *cookie)
+{
+        struct wl1271 *wl = cookie;
+        unsigned long flags;
+
+        wl1271_debug(DEBUG_IRQ, "IRQ");
+
+        /* complete the ELP completion */
+        spin_lock_irqsave(&wl->wl_lock, flags);
+        if (wl->elp_compl) {
+                complete(wl->elp_compl);
+                wl->elp_compl = NULL;
+        }
+
+        ieee80211_queue_work(wl->hw, &wl->irq_work);
+        spin_unlock_irqrestore(&wl->wl_lock, flags);
+
+        return IRQ_HANDLED;
+}
+
+static void wl1271_sdio_disable_interrupts(struct wl1271 *wl)
+{
+        disable_irq(wl->irq);
+}
+
+static void wl1271_sdio_enable_interrupts(struct wl1271 *wl)
+{
+        enable_irq(wl->irq);
+}
+
+static void wl1271_sdio_reset(struct wl1271 *wl)
+{
+}
+
+static void wl1271_sdio_init(struct wl1271 *wl)
+{
+}
+
+static void wl1271_sdio_raw_read(struct wl1271 *wl, int addr, void *buf,
+                         size_t len, bool fixed)
+{
+        int ret;
+        struct sdio_func *func = wl_to_func(wl);
+
+        sdio_claim_host(func);
+        if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
+                ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
+                wl1271_debug(DEBUG_SPI, "sdio read 52 addr 0x%x, byte 0x%02x",
+                             addr, ((u8 *)buf)[0]);
+        } else {
+                if (fixed)
+                        ret = sdio_readsb(func, buf, addr, len);
+                else
+                        ret = sdio_memcpy_fromio(func, buf, addr, len);
+
+                wl1271_debug(DEBUG_SPI, "sdio read 53 addr 0x%x, %d bytes",
+                             addr, len);
+                wl1271_dump_ascii(DEBUG_SPI, "data: ", buf, len);
+        }
+
+        if (ret)
+                wl1271_error("sdio read failed (%d)", ret);
+
+        sdio_release_host(func);
+}
+
+static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
+                          size_t len, bool fixed)
+{
+        int ret;
+        struct sdio_func *func = wl_to_func(wl);
+
+        sdio_claim_host(func);
+        if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
+                sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
+                wl1271_debug(DEBUG_SPI, "sdio write 52 addr 0x%x, byte 0x%02x",
+                             addr, ((u8 *)buf)[0]);
+        } else {
+                wl1271_debug(DEBUG_SPI, "sdio write 53 addr 0x%x, %d bytes",
+                             addr, len);
+                wl1271_dump_ascii(DEBUG_SPI, "data: ", buf, len);
+
+                if (fixed)
+                        ret = sdio_writesb(func, addr, buf, len);
+                else
+                        ret = sdio_memcpy_toio(func, addr, buf, len);
+        }
+        if (ret)
+                wl1271_error("sdio write failed (%d)", ret);
+
+        sdio_release_host(func);
+}
+
+static struct wl1271_if_operations sdio_ops = {
+        .read           = wl1271_sdio_raw_read,
+        .write          = wl1271_sdio_raw_write,
+        .reset          = wl1271_sdio_reset,
+        .init           = wl1271_sdio_init,
+        .dev            = wl1271_sdio_wl_to_dev,
+        .enable_irq     = wl1271_sdio_enable_interrupts,
+        .disable_irq    = wl1271_sdio_disable_interrupts
+};
+
+static void wl1271_sdio_set_power(bool enable)
+{
+}
+
+static int __devinit wl1271_probe(struct sdio_func *func,
+                                  const struct sdio_device_id *id)
+{
+        struct ieee80211_hw *hw;
+        struct wl1271 *wl;
+        int ret;
+
+        /* We are only able to handle the wlan function */
+        if (func->num != 0x02)
+                return -ENODEV;
+
+        hw = wl1271_alloc_hw();
+        if (IS_ERR(hw))
+                return PTR_ERR(hw);
+
+        wl = hw->priv;
+
+        wl->if_priv = func;
+        wl->if_ops = &sdio_ops;
+
+        wl->set_power = wl1271_sdio_set_power;
+
+        /* Grab access to FN0 for ELP reg. */
+        func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
+
+        wl->irq = gpio_to_irq(RX71_WL1271_IRQ_GPIO);
+        if (wl->irq < 0) {
+                ret = wl->irq;
+                wl1271_error("could not get irq!");
+                goto out_free;
+        }
+
+        ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
+        if (ret < 0) {
+                wl1271_error("request_irq() failed: %d", ret);
+                goto out_free;
+        }
+
+        set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
+
+        disable_irq(wl->irq);
+
+        ret = wl1271_init_ieee80211(wl);
+        if (ret)
+                goto out_irq;
+
+        ret = wl1271_register_hw(wl);
+        if (ret)
+                goto out_irq;
+
+        sdio_claim_host(func);
+        ret = sdio_enable_func(func);
+        if (ret)
+                goto out_release;
+
+        sdio_release_host(func);
+
+        wl1271_notice("initialized");
+
+        return 0;
+
+ out_release:
+        sdio_release_host(func);
+
+ out_irq:
+        free_irq(wl->irq, wl);
+
+
+ out_free:
+        ieee80211_free_hw(hw);
+
+        return ret;
+}
+
+static void __devexit wl1271_remove(struct sdio_func *func)
+{
+        struct wl1271 *wl = sdio_get_drvdata(func);
+
+        sdio_claim_host(func);
+        sdio_disable_func(func);
+        sdio_release_host(func);
+        ieee80211_unregister_hw(wl->hw);
+
+        free_irq(wl->irq, wl);
+
+        kfree(wl->target_mem_map);
+        vfree(wl->fw);
+        wl->fw = NULL;
+        kfree(wl->nvs);
+        wl->nvs = NULL;
+
+        kfree(wl->fw_status);
+        kfree(wl->tx_res_if);
+
+        ieee80211_free_hw(wl->hw);
+}
+
+static struct sdio_driver wl1271_sdio_driver = {
+        .name           = "wl1271",
+        .id_table       = wl1271_devices,
+        .probe          = wl1271_probe,
+        .remove         = __devexit_p(wl1271_remove),
+};
+
+static int __init wl1271_init(void)
+{
+        int ret;
+
+        ret = sdio_register_driver(&wl1271_sdio_driver);
+        if (ret < 0) {
+                wl1271_error("failed to register sdio driver: %d", ret);
+                goto out;
+        }
+
+out:
+        return ret;
+}
+
+static void __exit wl1271_exit(void)
+{
+        sdio_unregister_driver(&wl1271_sdio_driver);
+
+        wl1271_notice("unloaded");
+}
+
+module_init(wl1271_init);
+module_exit(wl1271_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");
+MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
+MODULE_FIRMWARE(WL1271_FW_NAME);