1 files changed, 433 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/sdio.c b/drivers/net/wireless/wl12xx/sdio.c
new file mode 100644
index 000000000000..536e5065454b
--- /dev/null
+++ b/drivers/net/wireless/wl12xx/sdio.c
@@ -0,0 +1,433 @@
+/*
+ * 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 <linux/mmc/host.h>
+#include <linux/gpio.h>
+#include <linux/wl12xx.h>
+#include <linux/pm_runtime.h>
+
+#include "wl12xx.h"
+#include "wl12xx_80211.h"
+#include "io.h"
+
+#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 void wl1271_sdio_set_block_size(struct wl1271 *wl, unsigned int blksz)
+{
+        sdio_claim_host(wl->if_priv);
+        sdio_set_block_size(wl->if_priv, blksz);
+        sdio_release_host(wl->if_priv);
+}
+
+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_hardirq(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);
+        set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags);
+        if (wl->elp_compl) {
+                complete(wl->elp_compl);
+                wl->elp_compl = NULL;
+        }
+
+        if (test_bit(WL1271_FLAG_SUSPENDED, &wl->flags)) {
+                /* don't enqueue a work right now. mark it as pending */
+                set_bit(WL1271_FLAG_PENDING_WORK, &wl->flags);
+                wl1271_debug(DEBUG_IRQ, "should not enqueue work");
+                disable_irq_nosync(wl->irq);
+                pm_wakeup_event(wl1271_sdio_wl_to_dev(wl), 0);
+                spin_unlock_irqrestore(&wl->wl_lock, flags);
+                return IRQ_HANDLED;
+        }
+        spin_unlock_irqrestore(&wl->wl_lock, flags);
+
+        return IRQ_WAKE_THREAD;
+}
+
+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);
+
+        if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
+                ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
+                wl1271_debug(DEBUG_SDIO, "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_SDIO, "sdio read 53 addr 0x%x, %zu bytes",
+                             addr, len);
+                wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
+        }
+
+        if (ret)
+                wl1271_error("sdio read failed (%d)", ret);
+}
+
+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);
+
+        if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
+                sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
+                wl1271_debug(DEBUG_SDIO, "sdio write 52 addr 0x%x, byte 0x%02x",
+                             addr, ((u8 *)buf)[0]);
+        } else {
+                wl1271_debug(DEBUG_SDIO, "sdio write 53 addr 0x%x, %zu bytes",
+                             addr, len);
+                wl1271_dump_ascii(DEBUG_SDIO, "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);
+}
+
+static int wl1271_sdio_power_on(struct wl1271 *wl)
+{
+        struct sdio_func *func = wl_to_func(wl);
+        int ret;
+
+        /* Make sure the card will not be powered off by runtime PM */
+        ret = pm_runtime_get_sync(&func->dev);
+        if (ret < 0)
+                goto out;
+
+        /* Runtime PM might be disabled, so power up the card manually */
+        ret = mmc_power_restore_host(func->card->host);
+        if (ret < 0)
+                goto out;
+
+        sdio_claim_host(func);
+        sdio_enable_func(func);
+
+out:
+        return ret;
+}
+
+static int wl1271_sdio_power_off(struct wl1271 *wl)
+{
+        struct sdio_func *func = wl_to_func(wl);
+        int ret;
+
+        sdio_disable_func(func);
+        sdio_release_host(func);
+
+        /* Runtime PM might be disabled, so power off the card manually */
+        ret = mmc_power_save_host(func->card->host);
+        if (ret < 0)
+                return ret;
+
+        /* Let runtime PM know the card is powered off */
+        return pm_runtime_put_sync(&func->dev);
+}
+
+static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
+{
+        if (enable)
+                return wl1271_sdio_power_on(wl);
+        else
+                return wl1271_sdio_power_off(wl);
+}
+
+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,
+        .power          = wl1271_sdio_set_power,
+        .dev            = wl1271_sdio_wl_to_dev,
+        .enable_irq     = wl1271_sdio_enable_interrupts,
+        .disable_irq    = wl1271_sdio_disable_interrupts,
+        .set_block_size = wl1271_sdio_set_block_size,
+};
+
+static int __devinit wl1271_probe(struct sdio_func *func,
+                                  const struct sdio_device_id *id)
+{
+        struct ieee80211_hw *hw;
+        const struct wl12xx_platform_data *wlan_data;
+        struct wl1271 *wl;
+        unsigned long irqflags;
+        mmc_pm_flag_t mmcflags;
+        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;
+
+        /* Grab access to FN0 for ELP reg. */
+        func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
+
+        /* Use block mode for transferring over one block size of data */
+        func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
+
+        wlan_data = wl12xx_get_platform_data();
+        if (IS_ERR(wlan_data)) {
+                ret = PTR_ERR(wlan_data);
+                wl1271_error("missing wlan platform data: %d", ret);
+                goto out_free;
+        }
+
+        wl->irq = wlan_data->irq;
+        wl->ref_clock = wlan_data->board_ref_clock;
+        wl->tcxo_clock = wlan_data->board_tcxo_clock;
+        wl->platform_quirks = wlan_data->platform_quirks;
+
+        if (wl->platform_quirks & WL12XX_PLATFORM_QUIRK_EDGE_IRQ)
+                irqflags = IRQF_TRIGGER_RISING;
+        else
+                irqflags = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;
+
+        ret = request_threaded_irq(wl->irq, wl1271_hardirq, wl1271_irq,
+                                   irqflags,
+                                   DRIVER_NAME, wl);
+        if (ret < 0) {
+                wl1271_error("request_irq() failed: %d", ret);
+                goto out_free;
+        }
+
+        enable_irq_wake(wl->irq);
+        device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 1);
+
+        disable_irq(wl->irq);
+
+        /* if sdio can keep power while host is suspended, enable wow */
+        mmcflags = sdio_get_host_pm_caps(func);
+        wl1271_debug(DEBUG_SDIO, "sdio PM caps = 0x%x", mmcflags);
+
+        if (mmcflags & MMC_PM_KEEP_POWER)
+                hw->wiphy->wowlan.flags = WIPHY_WOWLAN_ANY;
+
+        ret = wl1271_init_ieee80211(wl);
+        if (ret)
+                goto out_irq;
+
+        ret = wl1271_register_hw(wl);
+        if (ret)
+                goto out_irq;
+
+        sdio_set_drvdata(func, wl);
+
+        /* Tell PM core that we don't need the card to be powered now */
+        pm_runtime_put_noidle(&func->dev);
+
+        wl1271_notice("initialized");
+
+        return 0;
+
+ out_irq:
+        free_irq(wl->irq, wl);
+
+ out_free:
+        wl1271_free_hw(wl);
+
+        return ret;
+}
+
+static void __devexit wl1271_remove(struct sdio_func *func)
+{
+        struct wl1271 *wl = sdio_get_drvdata(func);
+
+        /* Undo decrement done above in wl1271_probe */
+        pm_runtime_get_noresume(&func->dev);
+
+        wl1271_unregister_hw(wl);
+        device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 0);
+        disable_irq_wake(wl->irq);
+        free_irq(wl->irq, wl);
+        wl1271_free_hw(wl);
+}
+
+#ifdef CONFIG_PM
+static int wl1271_suspend(struct device *dev)
+{
+        /* Tell MMC/SDIO core it's OK to power down the card
+         * (if it isn't already), but not to remove it completely */
+        struct sdio_func *func = dev_to_sdio_func(dev);
+        struct wl1271 *wl = sdio_get_drvdata(func);
+        mmc_pm_flag_t sdio_flags;
+        int ret = 0;
+
+        wl1271_debug(DEBUG_MAC80211, "wl1271 suspend. wow_enabled: %d",
+                     wl->wow_enabled);
+
+        /* check whether sdio should keep power */
+        if (wl->wow_enabled) {
+                sdio_flags = sdio_get_host_pm_caps(func);
+
+                if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
+                        wl1271_error("can't keep power while host "
+                                     "is suspended");
+                        ret = -EINVAL;
+                        goto out;
+                }
+
+                /* keep power while host suspended */
+                ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
+                if (ret) {
+                        wl1271_error("error while trying to keep power");
+                        goto out;
+                }
+
+                /* release host */
+                sdio_release_host(func);
+        }
+out:
+        return ret;
+}
+
+static int wl1271_resume(struct device *dev)
+{
+        struct sdio_func *func = dev_to_sdio_func(dev);
+        struct wl1271 *wl = sdio_get_drvdata(func);
+
+        wl1271_debug(DEBUG_MAC80211, "wl1271 resume");
+        if (wl->wow_enabled) {
+                /* claim back host */
+                sdio_claim_host(func);
+        }
+
+        return 0;
+}
+
+static const struct dev_pm_ops wl1271_sdio_pm_ops = {
+        .suspend        = wl1271_suspend,
+        .resume         = wl1271_resume,
+};
+#endif
+
+static struct sdio_driver wl1271_sdio_driver = {
+        .name           = "wl1271_sdio",
+        .id_table       = wl1271_devices,
+        .probe          = wl1271_probe,
+        .remove         = __devexit_p(wl1271_remove),
+#ifdef CONFIG_PM
+        .drv = {
+                .pm = &wl1271_sdio_pm_ops,
+        },
+#endif
+};
+
+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 <coelho@ti.com>");
+MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
+MODULE_FIRMWARE(WL1271_FW_NAME);
+MODULE_FIRMWARE(WL128X_FW_NAME);
+MODULE_FIRMWARE(WL127X_AP_FW_NAME);
+MODULE_FIRMWARE(WL128X_AP_FW_NAME);