[PATCH 14/15] omap: zoom: add WLAN device

[Ohad Ben-Cohen]

From: Ohad Ben-Cohen <ohadb at ti.com>

Add WLAN platform device and control
functions (power and virtual card detect)
in order to allow software to control the
embedded SDIO WLAN device which resides on
the ZOOM board (TI's wl1271 device).

Based on Android's WLAN control functions by
San Mehat <san at android.com>.

Signed-off-by: Ohad Ben-Cohen <ohadb at ti.com>
---
 arch/arm/mach-omap2/board-zoom-wlan.c         |  129 +++++++++++++++++++++++++
 arch/arm/mach-omap2/include/mach/board-zoom.h |    5 +
 2 files changed, 134 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm/mach-omap2/board-zoom-wlan.c

diff --git a/arch/arm/mach-omap2/board-zoom-wlan.c b/arch/arm/mach-omap2/board-zoom-wlan.c
new file mode 100644
index 0000000..7ed5139
--- /dev/null
+++ b/arch/arm/mach-omap2/board-zoom-wlan.c
@@ -0,0 +1,129 @@
+/* mach-omap2/board-zoom-wlan.c
+ *
+ * Board support for wl1271 embedded SDIO device.
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/sdio_ids.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/wl12xx.h>
+
+#include "mux.h"
+
+#ifdef CONFIG_OMAP_ZOOM_WLAN
+
+/* these are zoom-specific board numbers */
+#define OMAP_ZOOM_WLAN_PMENA_GPIO	(101)
+#define OMAP_ZOOM_WLAN_IRQ_GPIO		(162)
+
+/* wl1271 virtual 'card detect' status */
+static int omap_zoom_wlan_cd;
+static void (*wlan_set_virtual_cd)(void *dev_id, int card_present);
+static void (*wlan_set_data)(void *dev_id, void *priv);
+static void *wlan_host_devid;
+
+int omap_zoom_wlan_register_embedded_control(void *dev_id,
+			void (*set_virtual_cd)(void *dev_id, int card_present),
+			void (*set_data)(void *dev_id, void *priv))
+{
+	if (wlan_host_devid || wlan_set_virtual_cd || wlan_set_data)
+		return -EBUSY;
+
+	wlan_set_virtual_cd = set_virtual_cd;
+	wlan_set_data = set_data;
+	wlan_host_devid = dev_id;
+
+	return 0;
+}
+
+int omap_zoom_wlan_get_virtual_cd(void)
+{
+	return omap_zoom_wlan_cd;
+}
+
+static void omap_zoom_wlan_set_embedded_data(void *priv)
+{
+	if (wlan_set_data)
+		wlan_set_data(wlan_host_devid, priv);
+	else
+		pr_err("%s: host controller not registered yet\n", __func__);
+}
+
+static void omap_zoom_wlan_set_carddetect(bool card_present)
+{
+	omap_zoom_wlan_cd = card_present ? 1 : 0;
+
+	pr_info("%s: %d\n", __func__, omap_zoom_wlan_cd);
+
+	if (wlan_set_virtual_cd)
+		wlan_set_virtual_cd(wlan_host_devid, omap_zoom_wlan_cd);
+	else
+		pr_err("%s: host controller not registered yet\n", __func__);
+}
+
+static void omap_zoom_wlan_power(bool enable)
+{
+	int val = enable ? 1 : 0;
+
+	pr_info("%s: set power %d\n", __func__, val);
+
+	gpio_set_value(OMAP_ZOOM_WLAN_PMENA_GPIO, val);
+}
+
+struct wl12xx_platform_data omap_zoom_wlan_control = {
+	.set_power = omap_zoom_wlan_power,
+	.set_carddetect = omap_zoom_wlan_set_carddetect,
+	.set_embedded_data = omap_zoom_wlan_set_embedded_data,
+	/* ZOOM ref clock is 26 MHz */
+	.board_ref_clock = 1,
+	.irq = OMAP_GPIO_IRQ(OMAP_ZOOM_WLAN_IRQ_GPIO),
+};
+
+static struct platform_device omap_zoom_wlan_device = {
+	.name = "wl1271_sdio",
+	.id = 1,
+	.dev = {
+		.platform_data = &omap_zoom_wlan_control,
+	},
+};
+
+int __init omap_zoom_wlan_init(void)
+{
+	int ret;
+
+	ret = gpio_request(OMAP_ZOOM_WLAN_PMENA_GPIO, "wlan_power");
+	if (ret < 0) {
+		pr_err("%s: power gpio request failed: %d\n", __func__, ret);
+		return ret;
+	}
+
+	gpio_direction_output(OMAP_ZOOM_WLAN_PMENA_GPIO, 0);
+
+	ret = gpio_request(OMAP_ZOOM_WLAN_IRQ_GPIO, "wlan_irq");
+	if (ret < 0) {
+		pr_err("%s: gpio request failed: %d\n", __func__, ret);
+		return ret;
+	}
+	gpio_direction_input(OMAP_ZOOM_WLAN_IRQ_GPIO);
+
+	ret = platform_device_register(&omap_zoom_wlan_device);
+
+	return ret;
+}
+
+#else
+int __init omap_zoom_wlan_init(void)
+{
+	return 0;
+}
+#endif /* CONFIG_OMAP_ZOOM_WLAN */
diff --git a/arch/arm/mach-omap2/include/mach/board-zoom.h b/arch/arm/mach-omap2/include/mach/board-zoom.h
index c93b29e..61bbd81 100644
--- a/arch/arm/mach-omap2/include/mach/board-zoom.h
+++ b/arch/arm/mach-omap2/include/mach/board-zoom.h
@@ -3,3 +3,8 @@
  */
 extern int __init zoom_debugboard_init(void);
 extern void __init zoom_peripherals_init(void);
+int __init omap_zoom_wlan_init(void);
+int omap_zoom_wlan_register_embedded_control(void *dev_id,
+			void (*set_virtual_cd)(void *dev_id, int card_present),
+			void (*set_data)(void *dev_id, void *priv));
+int omap_zoom_wlan_get_virtual_cd(void);
-- 
1.7.0.4