staging: wilc1000: Add SDIO/SPI 802.11 driver

This driver is for the wilc1000 which is a single chip IEEE 802.11
b/g/n device.
The driver works together with cfg80211, which is the kernel side of
configuration management for wireless devices because the wilc1000
chipset is fullmac where the MLME is managed in hardware.

The driver worked from kernel version 2.6.38 and being now ported
to several others since then.
A TODO file is included as well in this commit.

Signed-off-by: Johnny Kim <johnny.kim@atmel.com>
Signed-off-by: Rachel Kim <rachel.kim@atmel.com>
Signed-off-by: Dean Lee <dean.lee@atmel.com>
Signed-off-by: Chris Park <chris.park@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 76 insertions, 0 deletions

diff --git a/drivers/staging/wilc1000/wilc_exported_buf.c b/drivers/staging/wilc1000/wilc_exported_buf.c
new file mode 100644
index 000000000000..529457816f65
--- /dev/null
+++ b/drivers/staging/wilc1000/wilc_exported_buf.c
@@ -0,0 +1,76 @@
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+
+#define LINUX_RX_SIZE	(96 * 1024)
+#define LINUX_TX_SIZE	(64 * 1024)
+#define WILC1000_FW_SIZE (4 * 1024)
+
+#define DECLARE_WILC_BUFFER(name)	\
+	void *exported_ ## name = NULL;
+
+#define MALLOC_WILC_BUFFER(name, size)	\
+	exported_ ## name = kmalloc(size, GFP_KERNEL);	  \
+	if (!exported_ ## name) {   \
+		printk("fail to alloc: %s memory\n", exported_ ## name);  \
+		return -ENOBUFS;	\
+	}
+
+#define FREE_WILC_BUFFER(name)	\
+	kfree(exported_ ## name);
+
+/*
+ * Add necessary buffer pointers
+ */
+DECLARE_WILC_BUFFER(g_tx_buf)
+DECLARE_WILC_BUFFER(g_rx_buf)
+DECLARE_WILC_BUFFER(g_fw_buf)
+
+void *get_tx_buffer(void)
+{
+	return exported_g_tx_buf;
+}
+EXPORT_SYMBOL(get_tx_buffer);
+
+void *get_rx_buffer(void)
+{
+	return exported_g_rx_buf;
+}
+EXPORT_SYMBOL(get_rx_buffer);
+
+void *get_fw_buffer(void)
+{
+	return exported_g_fw_buf;
+}
+EXPORT_SYMBOL(get_fw_buffer);
+
+static int __init wilc_module_init(void)
+{
+	printk("wilc_module_init\n");
+	/*
+	 * alloc necessary memory
+	 */
+	MALLOC_WILC_BUFFER(g_tx_buf, LINUX_TX_SIZE)
+	MALLOC_WILC_BUFFER(g_rx_buf, LINUX_RX_SIZE)
+	MALLOC_WILC_BUFFER(g_fw_buf, WILC1000_FW_SIZE)
+
+	return 0;
+}
+
+static void __exit wilc_module_deinit(void)
+{
+	printk("wilc_module_deinit\n");
+	FREE_WILC_BUFFER(g_tx_buf)
+	FREE_WILC_BUFFER(g_rx_buf)
+	FREE_WILC_BUFFER(g_fw_buf)
+
+	return;
+}
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_AUTHOR("Tony Cho");
+MODULE_DESCRIPTION("WILC1xxx Memory Manager");
+pure_initcall(wilc_module_init);
+module_exit(wilc_module_deinit);
\ No newline at end of file