wl12xx: add driver

wl12xx is a driver for TI wl1251 802.11 chipset designed for embedded
devices, supporting both SDIO and SPI busses. Currently the driver
supports only SPI. Adding support 1253 (the 5 GHz version) should be
relatively easy. More information here:

http://focus.ti.com/general/docs/wtbu/wtbuproductcontent.tsp?contentId=4711&navigationId=12494&templateId=6123

(Collapsed original sequence of pre-merge patches into single commit for
initial merge. -- JWL)

Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 109 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/spi.h b/drivers/net/wireless/wl12xx/spi.h
new file mode 100644
index 00000000000..fd3227e904a
--- /dev/null
+++ b/drivers/net/wireless/wl12xx/spi.h
@@ -0,0 +1,109 @@
+/*
+ * This file is part of wl12xx
+ *
+ * Copyright (c) 1998-2007 Texas Instruments Incorporated
+ * Copyright (C) 2008 Nokia Corporation
+ *
+ * Contact: Kalle Valo <kalle.valo@nokia.com>
+ *
+ * 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
+ *
+ */
+
+#ifndef __WL12XX_SPI_H__
+#define __WL12XX_SPI_H__
+
+#include "cmd.h"
+#include "acx.h"
+#include "reg.h"
+
+#define HW_ACCESS_MEMORY_MAX_RANGE              0x1FFC0
+
+#define HW_ACCESS_PART0_SIZE_ADDR           0x1FFC0
+#define HW_ACCESS_PART0_START_ADDR          0x1FFC4
+#define HW_ACCESS_PART1_SIZE_ADDR           0x1FFC8
+#define HW_ACCESS_PART1_START_ADDR          0x1FFCC
+
+#define HW_ACCESS_REGISTER_SIZE             4
+
+#define HW_ACCESS_PRAM_MAX_RANGE                0x3c000
+
+#define WSPI_CMD_READ                 0x40000000
+#define WSPI_CMD_WRITE                0x00000000
+#define WSPI_CMD_FIXED                0x20000000
+#define WSPI_CMD_BYTE_LENGTH          0x1FFE0000
+#define WSPI_CMD_BYTE_LENGTH_OFFSET   17
+#define WSPI_CMD_BYTE_ADDR            0x0001FFFF
+
+#define WSPI_INIT_CMD_CRC_LEN       5
+
+#define WSPI_INIT_CMD_START         0x00
+#define WSPI_INIT_CMD_TX            0x40
+/* the extra bypass bit is sampled by the TNET as '1' */
+#define WSPI_INIT_CMD_BYPASS_BIT    0x80
+#define WSPI_INIT_CMD_FIXEDBUSY_LEN 0x07
+#define WSPI_INIT_CMD_EN_FIXEDBUSY  0x80
+#define WSPI_INIT_CMD_DIS_FIXEDBUSY 0x00
+#define WSPI_INIT_CMD_IOD           0x40
+#define WSPI_INIT_CMD_IP            0x20
+#define WSPI_INIT_CMD_CS            0x10
+#define WSPI_INIT_CMD_WS            0x08
+#define WSPI_INIT_CMD_WSPI          0x01
+#define WSPI_INIT_CMD_END           0x01
+
+#define WSPI_INIT_CMD_LEN           8
+
+#define TNETWIF_READ_OFFSET_BYTES  8
+#define HW_ACCESS_WSPI_FIXED_BUSY_LEN \
+                ((TNETWIF_READ_OFFSET_BYTES - 4) / sizeof(u32))
+#define HW_ACCESS_WSPI_INIT_CMD_MASK  0
+
+
+/* Raw target IO, address is not translated */
+void wl12xx_spi_read(struct wl12xx *wl, int addr, void *buf, size_t len);
+void wl12xx_spi_write(struct wl12xx *wl, int addr, void *buf, size_t len);
+
+/* Memory target IO, address is tranlated to partition 0 */
+void wl12xx_spi_mem_read(struct wl12xx *wl, int addr, void *buf, size_t len);
+void wl12xx_spi_mem_write(struct wl12xx *wl, int addr, void *buf, size_t len);
+u32 wl12xx_mem_read32(struct wl12xx *wl, int addr);
+void wl12xx_mem_write32(struct wl12xx *wl, int addr, u32 val);
+
+/* Registers IO */
+u32 wl12xx_reg_read32(struct wl12xx *wl, int addr);
+void wl12xx_reg_write32(struct wl12xx *wl, int addr, u32 val);
+
+/* INIT and RESET words */
+void wl12xx_spi_reset(struct wl12xx *wl);
+void wl12xx_spi_init(struct wl12xx *wl);
+void wl12xx_set_partition(struct wl12xx *wl,
+                          u32 part_start, u32 part_size,
+                          u32 reg_start,  u32 reg_size);
+
+static inline u32 wl12xx_read32(struct wl12xx *wl, int addr)
+{
+        u32 response;
+
+        wl12xx_spi_read(wl, addr, &response, sizeof(u32));
+
+        return response;
+}
+
+static inline void wl12xx_write32(struct wl12xx *wl, int addr, u32 val)
+{
+        wl12xx_spi_write(wl, addr, &val, sizeof(u32));
+}
+
+#endif /* __WL12XX_SPI_H__ */