1 files changed, 378 insertions, 0 deletions

diff --git a/drivers/net/wireless/ti/wlcore/sdio.c b/drivers/net/wireless/ti/wlcore/sdio.c
new file mode 100644
index 00000000000..0a72347cfc4
--- /dev/null
+++ b/drivers/net/wireless/ti/wlcore/sdio.c
@@ -0,0 +1,378 @@
+/*
+ * 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/vmalloc.h>
+#include <linux/platform_device.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 "wlcore.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
+
+struct wl12xx_sdio_glue {
+	struct device *dev;
+	struct platform_device *core;
+};
+
+static const struct sdio_device_id wl1271_devices[] __devinitconst = {
+	{ 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 device *child,
+				       unsigned int blksz)
+{
+	struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
+	struct sdio_func *func = dev_to_sdio_func(glue->dev);
+
+	sdio_claim_host(func);
+	sdio_set_block_size(func, blksz);
+	sdio_release_host(func);
+}
+
+static void wl12xx_sdio_raw_read(struct device *child, int addr, void *buf,
+				 size_t len, bool fixed)
+{
+	int ret;
+	struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
+	struct sdio_func *func = dev_to_sdio_func(glue->dev);
+
+	sdio_claim_host(func);
+
+	if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) {
+		((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
+		dev_dbg(child->parent, "sdio read 52 addr 0x%x, byte 0x%02x\n",
+			addr, ((u8 *)buf)[0]);
+	} else {
+		if (fixed)
+			ret = sdio_readsb(func, buf, addr, len);
+		else
+			ret = sdio_memcpy_fromio(func, buf, addr, len);
+
+		dev_dbg(child->parent, "sdio read 53 addr 0x%x, %zu bytes\n",
+			addr, len);
+	}
+
+	sdio_release_host(func);
+
+	if (ret)
+		dev_err(child->parent, "sdio read failed (%d)\n", ret);
+}
+
+static void wl12xx_sdio_raw_write(struct device *child, int addr, void *buf,
+				  size_t len, bool fixed)
+{
+	int ret;
+	struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
+	struct sdio_func *func = dev_to_sdio_func(glue->dev);
+
+	sdio_claim_host(func);
+
+	if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) {
+		sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
+		dev_dbg(child->parent, "sdio write 52 addr 0x%x, byte 0x%02x\n",
+			addr, ((u8 *)buf)[0]);
+	} else {
+		dev_dbg(child->parent, "sdio write 53 addr 0x%x, %zu bytes\n",
+			addr, len);
+
+		if (fixed)
+			ret = sdio_writesb(func, addr, buf, len);
+		else
+			ret = sdio_memcpy_toio(func, addr, buf, len);
+	}
+
+	sdio_release_host(func);
+
+	if (ret)
+		dev_err(child->parent, "sdio write failed (%d)\n", ret);
+}
+
+static int wl12xx_sdio_power_on(struct wl12xx_sdio_glue *glue)
+{
+	int ret;
+	struct sdio_func *func = dev_to_sdio_func(glue->dev);
+
+	/* If enabled, tell runtime PM not to power off the card */
+	if (pm_runtime_enabled(&func->dev)) {
+		ret = pm_runtime_get_sync(&func->dev);
+		if (ret < 0)
+			goto out;
+	} else {
+		/* Runtime PM is disabled: 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);
+	sdio_release_host(func);
+
+out:
+	return ret;
+}
+
+static int wl12xx_sdio_power_off(struct wl12xx_sdio_glue *glue)
+{
+	int ret;
+	struct sdio_func *func = dev_to_sdio_func(glue->dev);
+
+	sdio_claim_host(func);
+	sdio_disable_func(func);
+	sdio_release_host(func);
+
+	/* Power off the card manually, even if runtime PM is enabled. */
+	ret = mmc_power_save_host(func->card->host);
+	if (ret < 0)
+		return ret;
+
+	/* If enabled, let runtime PM know the card is powered off */
+	if (pm_runtime_enabled(&func->dev))
+		ret = pm_runtime_put_sync(&func->dev);
+
+	return ret;
+}
+
+static int wl12xx_sdio_set_power(struct device *child, bool enable)
+{
+	struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
+
+	if (enable)
+		return wl12xx_sdio_power_on(glue);
+	else
+		return wl12xx_sdio_power_off(glue);
+}
+
+static struct wl1271_if_operations sdio_ops = {
+	.read		= wl12xx_sdio_raw_read,
+	.write		= wl12xx_sdio_raw_write,
+	.power		= wl12xx_sdio_set_power,
+	.set_block_size = wl1271_sdio_set_block_size,
+};
+
+static int __devinit wl1271_probe(struct sdio_func *func,
+				  const struct sdio_device_id *id)
+{
+	struct wl12xx_platform_data *wlan_data;
+	struct wl12xx_sdio_glue *glue;
+	struct resource res[1];
+	mmc_pm_flag_t mmcflags;
+	int ret = -ENOMEM;
+
+	/* We are only able to handle the wlan function */
+	if (func->num != 0x02)
+		return -ENODEV;
+
+	glue = kzalloc(sizeof(*glue), GFP_KERNEL);
+	if (!glue) {
+		dev_err(&func->dev, "can't allocate glue\n");
+		goto out;
+	}
+
+	glue->dev = &func->dev;
+
+	/* 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);
+		dev_err(glue->dev, "missing wlan platform data: %d\n", ret);
+		goto out_free_glue;
+	}
+
+	/* if sdio can keep power while host is suspended, enable wow */
+	mmcflags = sdio_get_host_pm_caps(func);
+	dev_dbg(glue->dev, "sdio PM caps = 0x%x\n", mmcflags);
+
+	if (mmcflags & MMC_PM_KEEP_POWER)
+		wlan_data->pwr_in_suspend = true;
+
+	wlan_data->ops = &sdio_ops;
+
+	sdio_set_drvdata(func, glue);
+
+	/* Tell PM core that we don't need the card to be powered now */
+	pm_runtime_put_noidle(&func->dev);
+
+	glue->core = platform_device_alloc("wl12xx", -1);
+	if (!glue->core) {
+		dev_err(glue->dev, "can't allocate platform_device");
+		ret = -ENOMEM;
+		goto out_free_glue;
+	}
+
+	glue->core->dev.parent = &func->dev;
+
+	memset(res, 0x00, sizeof(res));
+
+	res[0].start = wlan_data->irq;
+	res[0].flags = IORESOURCE_IRQ;
+	res[0].name = "irq";
+
+	ret = platform_device_add_resources(glue->core, res, ARRAY_SIZE(res));
+	if (ret) {
+		dev_err(glue->dev, "can't add resources\n");
+		goto out_dev_put;
+	}
+
+	ret = platform_device_add_data(glue->core, wlan_data,
+				       sizeof(*wlan_data));
+	if (ret) {
+		dev_err(glue->dev, "can't add platform data\n");
+		goto out_dev_put;
+	}
+
+	ret = platform_device_add(glue->core);
+	if (ret) {
+		dev_err(glue->dev, "can't add platform device\n");
+		goto out_dev_put;
+	}
+	return 0;
+
+out_dev_put:
+	platform_device_put(glue->core);
+
+out_free_glue:
+	kfree(glue);
+
+out:
+	return ret;
+}
+
+static void __devexit wl1271_remove(struct sdio_func *func)
+{
+	struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
+
+	/* Undo decrement done above in wl1271_probe */
+	pm_runtime_get_noresume(&func->dev);
+
+	platform_device_del(glue->core);
+	platform_device_put(glue->core);
+	kfree(glue);
+}
+
+#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 wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
+	struct wl1271 *wl = platform_get_drvdata(glue->core);
+	mmc_pm_flag_t sdio_flags;
+	int ret = 0;
+
+	dev_dbg(dev, "wl1271 suspend. wow_enabled: %d\n",
+		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)) {
+			dev_err(dev, "can't keep power while host "
+				     "is suspended\n");
+			ret = -EINVAL;
+			goto out;
+		}
+
+		/* keep power while host suspended */
+		ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
+		if (ret) {
+			dev_err(dev, "error while trying to keep power\n");
+			goto out;
+		}
+	}
+out:
+	return ret;
+}
+
+static int wl1271_resume(struct device *dev)
+{
+	dev_dbg(dev, "wl1271 resume\n");
+
+	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)
+{
+	return sdio_register_driver(&wl1271_sdio_driver);
+}
+
+static void __exit wl1271_exit(void)
+{
+	sdio_unregister_driver(&wl1271_sdio_driver);
+}
+
+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(WL127X_FW_NAME_SINGLE);
+MODULE_FIRMWARE(WL127X_FW_NAME_MULTI);
+MODULE_FIRMWARE(WL127X_PLT_FW_NAME);
+MODULE_FIRMWARE(WL128X_FW_NAME_SINGLE);
+MODULE_FIRMWARE(WL128X_FW_NAME_MULTI);
+MODULE_FIRMWARE(WL128X_PLT_FW_NAME);