Hi Ohad,
On 07/06/2010 03:37 AM, ext Ohad Ben-Cohen wrote:
From: Ohad Ben-Cohen<ohadb@xxxxxx>
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@xxxxxxxxxxx>.
Signed-off-by: Ohad Ben-Cohen<ohadb@xxxxxx>
---
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);
+}
Can we consider that OMAP_ZOOM_WLAN_PMENA_GPIO is equivalent to vmmc supply or
equivalent to supply voltage to the SDIO card?
If yes, then did you consider using the fixed regulator framework to define a
'vmmc' supply (based on OMAP_ZOOM_WLAN_PMENA_GPIO). Then the SDIO/MMC core
should take care of controlling this supply.
regards,
-roger
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