1 files changed, 65 insertions, 189 deletions

diff --git a/drivers/net/wireless/wl12xx/wl1271_spi.c b/drivers/net/wireless/wl12xx/wl1271_spi.c
index 4a12880c16a8..053c84aceb49 100644
--- a/drivers/net/wireless/wl12xx/wl1271_spi.c
+++ b/drivers/net/wireless/wl12xx/wl1271_spi.c
@@ -25,21 +25,12 @@
 #include <linux/platform_device.h>
 #include <linux/crc7.h>
 #include <linux/spi/spi.h>
+#include <linux/slab.h>
 
 #include "wl1271.h"
 #include "wl12xx_80211.h"
 #include "wl1271_spi.h"
 
-static int wl1271_translate_reg_addr(struct wl1271 *wl, int addr)
-{
-        return addr - wl->physical_reg_addr + wl->virtual_reg_addr;
-}
-
-static int wl1271_translate_mem_addr(struct wl1271 *wl, int addr)
-{
-        return addr - wl->physical_mem_addr + wl->virtual_mem_addr;
-}
-
 
 void wl1271_spi_reset(struct wl1271 *wl)
 {
@@ -121,135 +112,78 @@ void wl1271_spi_init(struct wl1271 *wl)
         wl1271_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN);
 }
 
-/* Set the SPI partitions to access the chip addresses
- *
- * There are two VIRTUAL (SPI) partitions (the memory partition and the
- * registers partition), which are mapped to two different areas of the
- * PHYSICAL (hardware) memory.  This function also makes other checks to
- * ensure that the partitions are not overlapping.  In the diagram below, the
- * memory partition comes before the register partition, but the opposite is
- * also supported.
- *
- *                               PHYSICAL address
- *                                     space
- *
- *                                    |    |
- *                                 ...+----+--> mem_start
- *          VIRTUAL address     ...   |    |
- *               space       ...      |    | [PART_0]
- *                        ...         |    |
- * 0x00000000 <--+----+...         ...+----+--> mem_start + mem_size
- *               |    |         ...   |    |
- *               |MEM |      ...      |    |
- *               |    |   ...         |    |
- *  part_size <--+----+...            |    | {unused area)
- *               |    |   ...         |    |
- *               |REG |      ...      |    |
- *  part_size    |    |         ...   |    |
- *      +     <--+----+...         ...+----+--> reg_start
- *  reg_size              ...         |    |
- *                           ...      |    | [PART_1]
- *                              ...   |    |
- *                                 ...+----+--> reg_start + reg_size
- *                                    |    |
- *
- */
-int wl1271_set_partition(struct wl1271 *wl,
-                          u32 mem_start, u32 mem_size,
-                          u32 reg_start, u32 reg_size)
+#define WL1271_BUSY_WORD_TIMEOUT 1000
+
+/* FIXME: Check busy words, removed due to SPI bug */
+#if 0
+static void wl1271_spi_read_busy(struct wl1271 *wl, void *buf, size_t len)
 {
-        struct wl1271_partition *partition;
-        struct spi_transfer t;
+        struct spi_transfer t[1];
         struct spi_message m;
-        size_t len, cmd_len;
-        u32 *cmd;
-        int addr;
-
-        cmd_len = sizeof(u32) + 2 * sizeof(struct wl1271_partition);
-        cmd = kzalloc(cmd_len, GFP_KERNEL);
-        if (!cmd)
-                return -ENOMEM;
-
-        spi_message_init(&m);
-        memset(&t, 0, sizeof(t));
+        u32 *busy_buf;
+        int num_busy_bytes = 0;
 
-        partition = (struct wl1271_partition *) (cmd + 1);
-        addr = HW_ACCESS_PART0_SIZE_ADDR;
-        len = 2 * sizeof(struct wl1271_partition);
+        wl1271_info("spi read BUSY!");
 
-        *cmd |= WSPI_CMD_WRITE;
-        *cmd |= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
-        *cmd |= addr & WSPI_CMD_BYTE_ADDR;
-
-        wl1271_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
-                     mem_start, mem_size);
-        wl1271_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
-                     reg_start, reg_size);
-
-        /* Make sure that the two partitions together don't exceed the
-         * address range */
-        if ((mem_size + reg_size) > HW_ACCESS_MEMORY_MAX_RANGE) {
-                wl1271_debug(DEBUG_SPI, "Total size exceeds maximum virtual"
-                             " address range.  Truncating partition[0].");
-                mem_size = HW_ACCESS_MEMORY_MAX_RANGE - reg_size;
-                wl1271_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
-                             mem_start, mem_size);
-                wl1271_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
-                             reg_start, reg_size);
-        }
-
-        if ((mem_start < reg_start) &&
-            ((mem_start + mem_size) > reg_start)) {
-                /* Guarantee that the memory partition doesn't overlap the
-                 * registers partition */
-                wl1271_debug(DEBUG_SPI, "End of partition[0] is "
-                             "overlapping partition[1].  Adjusted.");
-                mem_size = reg_start - mem_start;
-                wl1271_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
-                             mem_start, mem_size);
-                wl1271_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
-                             reg_start, reg_size);
-        } else if ((reg_start < mem_start) &&
-                   ((reg_start + reg_size) > mem_start)) {
-                /* Guarantee that the register partition doesn't overlap the
-                 * memory partition */
-                wl1271_debug(DEBUG_SPI, "End of partition[1] is"
-                             " overlapping partition[0].  Adjusted.");
-                reg_size = mem_start - reg_start;
-                wl1271_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
-                             mem_start, mem_size);
-                wl1271_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
-                             reg_start, reg_size);
+        /*
+         * Look for the non-busy word in the read buffer, and if found,
+         * read in the remaining data into the buffer.
+         */
+        busy_buf = (u32 *)buf;
+        for (; (u32)busy_buf < (u32)buf + len; busy_buf++) {
+                num_busy_bytes += sizeof(u32);
+                if (*busy_buf & 0x1) {
+                        spi_message_init(&m);
+                        memset(t, 0, sizeof(t));
+                        memmove(buf, busy_buf, len - num_busy_bytes);
+                        t[0].rx_buf = buf + (len - num_busy_bytes);
+                        t[0].len = num_busy_bytes;
+                        spi_message_add_tail(&t[0], &m);
+                        spi_sync(wl->spi, &m);
+                        return;
+                }
         }
 
-        partition[0].start = mem_start;
-        partition[0].size  = mem_size;
-        partition[1].start = reg_start;
-        partition[1].size  = reg_size;
-
-        wl->physical_mem_addr = mem_start;
-        wl->physical_reg_addr = reg_start;
-
-        wl->virtual_mem_addr = 0;
-        wl->virtual_reg_addr = mem_size;
-
-        t.tx_buf = cmd;
-        t.len = cmd_len;
-        spi_message_add_tail(&t, &m);
-
-        spi_sync(wl->spi, &m);
+        /*
+         * Read further busy words from SPI until a non-busy word is
+         * encountered, then read the data itself into the buffer.
+         */
+        wl1271_info("spi read BUSY-polling needed!");
 
-        kfree(cmd);
+        num_busy_bytes = WL1271_BUSY_WORD_TIMEOUT;
+        busy_buf = wl->buffer_busyword;
+        while (num_busy_bytes) {
+                num_busy_bytes--;
+                spi_message_init(&m);
+                memset(t, 0, sizeof(t));
+                t[0].rx_buf = busy_buf;
+                t[0].len = sizeof(u32);
+                spi_message_add_tail(&t[0], &m);
+                spi_sync(wl->spi, &m);
+
+                if (*busy_buf & 0x1) {
+                        spi_message_init(&m);
+                        memset(t, 0, sizeof(t));
+                        t[0].rx_buf = buf;
+                        t[0].len = len;
+                        spi_message_add_tail(&t[0], &m);
+                        spi_sync(wl->spi, &m);
+                        return;
+                }
+        }
 
-        return 0;
+        /* The SPI bus is unresponsive, the read failed. */
+        memset(buf, 0, len);
+        wl1271_error("SPI read busy-word timeout!\n");
 }
+#endif
 
-void wl1271_spi_read(struct wl1271 *wl, int addr, void *buf,
-                     size_t len, bool fixed)
+void wl1271_spi_raw_read(struct wl1271 *wl, int addr, void *buf,
+                         size_t len, bool fixed)
 {
         struct spi_transfer t[3];
         struct spi_message m;
-        u8 *busy_buf;
+        u32 *busy_buf;
         u32 *cmd;
 
         cmd = &wl->buffer_cmd;
@@ -281,14 +215,16 @@ void wl1271_spi_read(struct wl1271 *wl, int addr, void *buf,
 
         spi_sync(wl->spi, &m);
 
-        /* FIXME: check busy words */
+        /* FIXME: Check busy words, removed due to SPI bug */
+        /* if (!(busy_buf[WL1271_BUSY_WORD_CNT - 1] & 0x1))
+           wl1271_spi_read_busy(wl, buf, len); */
 
         wl1271_dump(DEBUG_SPI, "spi_read cmd -> ", cmd, sizeof(*cmd));
         wl1271_dump(DEBUG_SPI, "spi_read buf <- ", buf, len);
 }
 
-void wl1271_spi_write(struct wl1271 *wl, int addr, void *buf,
-                      size_t len, bool fixed)
+void wl1271_spi_raw_write(struct wl1271 *wl, int addr, void *buf,
+                          size_t len, bool fixed)
 {
         struct spi_transfer t[2];
         struct spi_message m;
@@ -320,63 +256,3 @@ void wl1271_spi_write(struct wl1271 *wl, int addr, void *buf,
         wl1271_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd));
         wl1271_dump(DEBUG_SPI, "spi_write buf -> ", buf, len);
 }
-
-void wl1271_spi_mem_read(struct wl1271 *wl, int addr, void *buf,
-                         size_t len)
-{
-        int physical;
-
-        physical = wl1271_translate_mem_addr(wl, addr);
-
-        wl1271_spi_read(wl, physical, buf, len, false);
-}
-
-void wl1271_spi_mem_write(struct wl1271 *wl, int addr, void *buf,
-                          size_t len)
-{
-        int physical;
-
-        physical = wl1271_translate_mem_addr(wl, addr);
-
-        wl1271_spi_write(wl, physical, buf, len, false);
-}
-
-void wl1271_spi_reg_read(struct wl1271 *wl, int addr, void *buf, size_t len,
-                         bool fixed)
-{
-        int physical;
-
-        physical = wl1271_translate_reg_addr(wl, addr);
-
-        wl1271_spi_read(wl, physical, buf, len, fixed);
-}
-
-void wl1271_spi_reg_write(struct wl1271 *wl, int addr, void *buf, size_t len,
-                          bool fixed)
-{
-        int physical;
-
-        physical = wl1271_translate_reg_addr(wl, addr);
-
-        wl1271_spi_write(wl, physical, buf, len, fixed);
-}
-
-u32 wl1271_mem_read32(struct wl1271 *wl, int addr)
-{
-        return wl1271_read32(wl, wl1271_translate_mem_addr(wl, addr));
-}
-
-void wl1271_mem_write32(struct wl1271 *wl, int addr, u32 val)
-{
-        wl1271_write32(wl, wl1271_translate_mem_addr(wl, addr), val);
-}
-
-u32 wl1271_reg_read32(struct wl1271 *wl, int addr)
-{
-        return wl1271_read32(wl, wl1271_translate_reg_addr(wl, addr));
-}
-
-void wl1271_reg_write32(struct wl1271 *wl, int addr, u32 val)
-{
-        wl1271_write32(wl, wl1271_translate_reg_addr(wl, addr), val);
-}