wl1251: move to it's own directory

wl1271 driver is under heavy development but on the other hand the older
wl1251 driver is currently considered more as a legacy driver. To make it
easier to develop wl1271 features move wl1251 to it's own directory,
drivers/net/wireless/wl1251.

There are no functional changes, only moving of files. One regression
is that Kconfig won't be updated automatically and user needs to enable
wl1251 manually with an older config file.

Signed-off-by: Kalle Valo <kvalo@adurom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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>");