xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

wl1251: make wl1251_set_partition bus agnostic

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

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));
}