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wl1251: make wl1251_set_partition bus agnostic 

The same partition setting code can be used for both SPI and SDIO
modes, if we remove the spi-specific commands and use the more
generic buffer write routines.  Do that and move it to io.c
since it deals with register/memory address offsets.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Bob Copeland 2009-08-07 13:33:18 +03:00 committed by John W. Linville
parent 08d9f57251
commit 0d77e14133
4 changed files with 110 additions and 139 deletions
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95
drivers/net/wireless/wl12xx/wl1251_io.c
View File

@ -84,3 +84,98 @@ void wl1251_reg_write32(struct wl1251 *wl, int addr, u32 val)
{
wl1251_write32(wl, wl1251_translate_reg_addr(wl, addr), val);
}
/* Set the partitions to access the chip addresses.
*
* There are two VIRTUAL 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
* | |
*
*/
void wl1251_set_partition(struct wl1251 *wl,
u32 mem_start, u32 mem_size,
u32 reg_start, u32 reg_size)
{
struct wl1251_partition partition[2];
wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
mem_start, mem_size);
wl1251_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) {
wl1251_debug(DEBUG_SPI, "Total size exceeds maximum virtual"
" address range. Truncating partition[0].");
mem_size = HW_ACCESS_MEMORY_MAX_RANGE - reg_size;
wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
mem_start, mem_size);
wl1251_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 */
wl1251_debug(DEBUG_SPI, "End of partition[0] is "
"overlapping partition[1]. Adjusted.");
mem_size = reg_start - mem_start;
wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
mem_start, mem_size);
wl1251_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 */
wl1251_debug(DEBUG_SPI, "End of partition[1] is"
" overlapping partition[0]. Adjusted.");
reg_size = mem_start - reg_start;
wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
mem_start, mem_size);
wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
reg_start, reg_size);
}
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;
wl->if_ops->write(wl, HW_ACCESS_PART0_SIZE_ADDR, partition,
sizeof(partition));
}

15
drivers/net/wireless/wl12xx/wl1251_io.h
View File

@ -23,6 +23,17 @@
#include "wl1251.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
static inline u32 wl1251_read32(struct wl1251 *wl, int addr)
{
u32 response;
@ -46,4 +57,8 @@ void wl1251_mem_write32(struct wl1251 *wl, int addr, u32 val);
u32 wl1251_reg_read32(struct wl1251 *wl, int addr);
void wl1251_reg_write32(struct wl1251 *wl, int addr, u32 val);
void wl1251_set_partition(struct wl1251 *wl,
u32 part_start, u32 part_size,
u32 reg_start, u32 reg_size);
#endif

124
drivers/net/wireless/wl12xx/wl1251_spi.c
View File

@ -115,130 +115,6 @@ static void wl1251_spi_reset_wake(struct wl1251 *wl)
wl1251_spi_init(wl);
}
/* 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 wl1251_set_partition(struct wl1251 *wl,
u32 mem_start, u32 mem_size,
u32 reg_start, u32 reg_size)
{
struct wl1251_partition *partition;
struct spi_transfer t;
struct spi_message m;
size_t len, cmd_len;
u32 *cmd;
int addr;
cmd_len = sizeof(u32) + 2 * sizeof(struct wl1251_partition);
cmd = kzalloc(cmd_len, GFP_KERNEL);
if (!cmd)
return -ENOMEM;
spi_message_init(&m);
memset(&t, 0, sizeof(t));
partition = (struct wl1251_partition *) (cmd + 1);
addr = HW_ACCESS_PART0_SIZE_ADDR;
len = 2 * sizeof(struct wl1251_partition);
*cmd |= WSPI_CMD_WRITE;
*cmd |= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
*cmd |= addr & WSPI_CMD_BYTE_ADDR;
wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
mem_start, mem_size);
wl1251_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) {
wl1251_debug(DEBUG_SPI, "Total size exceeds maximum virtual"
" address range. Truncating partition[0].");
mem_size = HW_ACCESS_MEMORY_MAX_RANGE - reg_size;
wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
mem_start, mem_size);
wl1251_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 */
wl1251_debug(DEBUG_SPI, "End of partition[0] is "
"overlapping partition[1]. Adjusted.");
mem_size = reg_start - mem_start;
wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
mem_start, mem_size);
wl1251_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 */
wl1251_debug(DEBUG_SPI, "End of partition[1] is"
" overlapping partition[0]. Adjusted.");
reg_size = mem_start - reg_start;
wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
mem_start, mem_size);
wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
reg_start, reg_size);
}
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);
kfree(cmd);
return 0;
}
static void wl1251_spi_read(struct wl1251 *wl, int addr, void *buf,
size_t len)
{

15
drivers/net/wireless/wl12xx/wl1251_spi.h
View File

@ -29,17 +29,6 @@
#include "wl1251_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
@ -69,8 +58,4 @@
((WL1251_BUSY_WORD_LEN - 4) / sizeof(u32))
#define HW_ACCESS_WSPI_INIT_CMD_MASK 0
int wl1251_set_partition(struct wl1251 *wl,
u32 part_start, u32 part_size,
u32 reg_start, u32 reg_size);
#endif /* __WL1251_SPI_H__ */