1 files changed, 342 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl1251/sdio.c b/drivers/net/wireless/wl1251/sdio.c
new file mode 100644
index 000000000000..74ba9ced5393
--- /dev/null
+++ b/drivers/net/wireless/wl1251/sdio.c
@@ -0,0 +1,342 @@
+/*
+ * 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/mod_devicetable.h>
+#include <linux/mmc/sdio_func.h>
+#include <linux/mmc/sdio_ids.h>
+#include <linux/platform_device.h>
+#include <linux/wl12xx.h>
+#include <linux/irq.h>
+
+#include "wl1251.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
+
+struct wl1251_sdio {
+	struct sdio_func *func;
+	u32 elp_val;
+};
+
+static struct wl12xx_platform_data *wl12xx_board_data;
+
+static struct sdio_func *wl_to_func(struct wl1251 *wl)
+{
+	struct wl1251_sdio *wl_sdio = wl->if_priv;
+	return wl_sdio->func;
+}
+
+static void wl1251_sdio_interrupt(struct sdio_func *func)
+{
+	struct wl1251 *wl = sdio_get_drvdata(func);
+
+	wl1251_debug(DEBUG_IRQ, "IRQ");
+
+	/* FIXME should be synchronous for sdio */
+	ieee80211_queue_work(wl->hw, &wl->irq_work);
+}
+
+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);
+
+
+static 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);
+}
+
+static 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);
+}
+
+static void wl1251_sdio_read_elp(struct wl1251 *wl, int addr, u32 *val)
+{
+	int ret = 0;
+	struct wl1251_sdio *wl_sdio = wl->if_priv;
+	struct sdio_func *func = wl_sdio->func;
+
+	/*
+	 * The hardware only supports RAW (read after write) access for
+	 * reading, regular sdio_readb won't work here (it interprets
+	 * the unused bits of CMD52 as write data even if we send read
+	 * request).
+	 */
+	sdio_claim_host(func);
+	*val = sdio_writeb_readb(func, wl_sdio->elp_val, addr, &ret);
+	sdio_release_host(func);
+
+	if (ret)
+		wl1251_error("sdio_readb failed (%d)", ret);
+}
+
+static void wl1251_sdio_write_elp(struct wl1251 *wl, int addr, u32 val)
+{
+	int ret = 0;
+	struct wl1251_sdio *wl_sdio = wl->if_priv;
+	struct sdio_func *func = wl_sdio->func;
+
+	sdio_claim_host(func);
+	sdio_writeb(func, val, addr, &ret);
+	sdio_release_host(func);
+
+	if (ret)
+		wl1251_error("sdio_writeb failed (%d)", ret);
+	else
+		wl_sdio->elp_val = val;
+}
+
+static void wl1251_sdio_reset(struct wl1251 *wl)
+{
+}
+
+static void wl1251_sdio_enable_irq(struct wl1251 *wl)
+{
+	struct sdio_func *func = wl_to_func(wl);
+
+	sdio_claim_host(func);
+	sdio_claim_irq(func, wl1251_sdio_interrupt);
+	sdio_release_host(func);
+}
+
+static void wl1251_sdio_disable_irq(struct wl1251 *wl)
+{
+	struct sdio_func *func = wl_to_func(wl);
+
+	sdio_claim_host(func);
+	sdio_release_irq(func);
+	sdio_release_host(func);
+}
+
+/* Interrupts when using dedicated WLAN_IRQ pin */
+static irqreturn_t wl1251_line_irq(int irq, void *cookie)
+{
+	struct wl1251 *wl = cookie;
+
+	ieee80211_queue_work(wl->hw, &wl->irq_work);
+
+	return IRQ_HANDLED;
+}
+
+static void wl1251_enable_line_irq(struct wl1251 *wl)
+{
+	return enable_irq(wl->irq);
+}
+
+static void wl1251_disable_line_irq(struct wl1251 *wl)
+{
+	return disable_irq(wl->irq);
+}
+
+static void wl1251_sdio_set_power(bool enable)
+{
+}
+
+static struct wl1251_if_operations wl1251_sdio_ops = {
+	.read = wl1251_sdio_read,
+	.write = wl1251_sdio_write,
+	.write_elp = wl1251_sdio_write_elp,
+	.read_elp = wl1251_sdio_read_elp,
+	.reset = wl1251_sdio_reset,
+};
+
+static int wl1251_platform_probe(struct platform_device *pdev)
+{
+	if (pdev->id != -1) {
+		wl1251_error("can only handle single device");
+		return -ENODEV;
+	}
+
+	wl12xx_board_data = pdev->dev.platform_data;
+	return 0;
+}
+
+/*
+ * Dummy platform_driver for passing platform_data to this driver,
+ * until we have a way to pass this through SDIO subsystem or
+ * some other way.
+ */
+static struct platform_driver wl1251_platform_driver = {
+	.driver = {
+		.name	= "wl1251_data",
+		.owner	= THIS_MODULE,
+	},
+	.probe	= wl1251_platform_probe,
+};
+
+static int wl1251_sdio_probe(struct sdio_func *func,
+			     const struct sdio_device_id *id)
+{
+	int ret;
+	struct wl1251 *wl;
+	struct ieee80211_hw *hw;
+	struct wl1251_sdio *wl_sdio;
+
+	hw = wl1251_alloc_hw();
+	if (IS_ERR(hw))
+		return PTR_ERR(hw);
+
+	wl = hw->priv;
+
+	wl_sdio = kzalloc(sizeof(*wl_sdio), GFP_KERNEL);
+	if (wl_sdio == NULL) {
+		ret = -ENOMEM;
+		goto out_free_hw;
+	}
+
+	sdio_claim_host(func);
+	ret = sdio_enable_func(func);
+	if (ret)
+		goto release;
+
+	sdio_set_block_size(func, 512);
+	sdio_release_host(func);
+
+	SET_IEEE80211_DEV(hw, &func->dev);
+	wl_sdio->func = func;
+	wl->if_priv = wl_sdio;
+	wl->if_ops = &wl1251_sdio_ops;
+	wl->set_power = wl1251_sdio_set_power;
+
+	if (wl12xx_board_data != NULL) {
+		wl->set_power = wl12xx_board_data->set_power;
+		wl->irq = wl12xx_board_data->irq;
+		wl->use_eeprom = wl12xx_board_data->use_eeprom;
+	}
+
+	if (wl->irq) {
+		ret = request_irq(wl->irq, wl1251_line_irq, 0, "wl1251", wl);
+		if (ret < 0) {
+			wl1251_error("request_irq() failed: %d", ret);
+			goto disable;
+		}
+
+		set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
+		disable_irq(wl->irq);
+
+		wl1251_sdio_ops.enable_irq = wl1251_enable_line_irq;
+		wl1251_sdio_ops.disable_irq = wl1251_disable_line_irq;
+
+		wl1251_info("using dedicated interrupt line");
+	} else {
+		wl1251_sdio_ops.enable_irq = wl1251_sdio_enable_irq;
+		wl1251_sdio_ops.disable_irq = wl1251_sdio_disable_irq;
+
+		wl1251_info("using SDIO interrupt");
+	}
+
+	ret = wl1251_init_ieee80211(wl);
+	if (ret)
+		goto out_free_irq;
+
+	sdio_set_drvdata(func, wl);
+	return ret;
+
+out_free_irq:
+	if (wl->irq)
+		free_irq(wl->irq, wl);
+disable:
+	sdio_claim_host(func);
+	sdio_disable_func(func);
+release:
+	sdio_release_host(func);
+	kfree(wl_sdio);
+out_free_hw:
+	wl1251_free_hw(wl);
+	return ret;
+}
+
+static void __devexit wl1251_sdio_remove(struct sdio_func *func)
+{
+	struct wl1251 *wl = sdio_get_drvdata(func);
+	struct wl1251_sdio *wl_sdio = wl->if_priv;
+
+	if (wl->irq)
+		free_irq(wl->irq, wl);
+	kfree(wl_sdio);
+	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 = platform_driver_register(&wl1251_platform_driver);
+	if (err) {
+		wl1251_error("failed to register platform driver: %d", err);
+		return 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);
+	platform_driver_unregister(&wl1251_platform_driver);
+	wl1251_notice("unloaded");
+}
+
+module_init(wl1251_sdio_init);
+module_exit(wl1251_sdio_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");