mirror of
https://github.com/torvalds/linux.git
synced 2024-12-05 02:23:16 +00:00
3ee373055b
CHECK drivers/bcma/driver_chipcommon_sflash.c drivers/bcma/driver_chipcommon_sflash.c:41:11: warning: Using plain integer as NULL pointer drivers/bcma/driver_chipcommon_sflash.c:59:11: warning: Using plain integer as NULL pointer drivers/bcma/driver_chipcommon_sflash.c:70:11: warning: Using plain integer as NULL pointer Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
166 lines
4.2 KiB
C
166 lines
4.2 KiB
C
/*
|
|
* Broadcom specific AMBA
|
|
* ChipCommon serial flash interface
|
|
*
|
|
* Licensed under the GNU/GPL. See COPYING for details.
|
|
*/
|
|
|
|
#include "bcma_private.h"
|
|
|
|
#include <linux/platform_device.h>
|
|
#include <linux/bcma/bcma.h>
|
|
|
|
static struct resource bcma_sflash_resource = {
|
|
.name = "bcma_sflash",
|
|
.start = BCMA_SOC_FLASH2,
|
|
.end = 0,
|
|
.flags = IORESOURCE_MEM | IORESOURCE_READONLY,
|
|
};
|
|
|
|
struct platform_device bcma_sflash_dev = {
|
|
.name = "bcma_sflash",
|
|
.resource = &bcma_sflash_resource,
|
|
.num_resources = 1,
|
|
};
|
|
|
|
struct bcma_sflash_tbl_e {
|
|
char *name;
|
|
u32 id;
|
|
u32 blocksize;
|
|
u16 numblocks;
|
|
};
|
|
|
|
static const struct bcma_sflash_tbl_e bcma_sflash_st_tbl[] = {
|
|
{ "M25P20", 0x11, 0x10000, 4, },
|
|
{ "M25P40", 0x12, 0x10000, 8, },
|
|
|
|
{ "M25P16", 0x14, 0x10000, 32, },
|
|
{ "M25P32", 0x15, 0x10000, 64, },
|
|
{ "M25P64", 0x16, 0x10000, 128, },
|
|
{ "M25FL128", 0x17, 0x10000, 256, },
|
|
{ NULL },
|
|
};
|
|
|
|
static const struct bcma_sflash_tbl_e bcma_sflash_sst_tbl[] = {
|
|
{ "SST25WF512", 1, 0x1000, 16, },
|
|
{ "SST25VF512", 0x48, 0x1000, 16, },
|
|
{ "SST25WF010", 2, 0x1000, 32, },
|
|
{ "SST25VF010", 0x49, 0x1000, 32, },
|
|
{ "SST25WF020", 3, 0x1000, 64, },
|
|
{ "SST25VF020", 0x43, 0x1000, 64, },
|
|
{ "SST25WF040", 4, 0x1000, 128, },
|
|
{ "SST25VF040", 0x44, 0x1000, 128, },
|
|
{ "SST25VF040B", 0x8d, 0x1000, 128, },
|
|
{ "SST25WF080", 5, 0x1000, 256, },
|
|
{ "SST25VF080B", 0x8e, 0x1000, 256, },
|
|
{ "SST25VF016", 0x41, 0x1000, 512, },
|
|
{ "SST25VF032", 0x4a, 0x1000, 1024, },
|
|
{ "SST25VF064", 0x4b, 0x1000, 2048, },
|
|
{ NULL },
|
|
};
|
|
|
|
static const struct bcma_sflash_tbl_e bcma_sflash_at_tbl[] = {
|
|
{ "AT45DB011", 0xc, 256, 512, },
|
|
{ "AT45DB021", 0x14, 256, 1024, },
|
|
{ "AT45DB041", 0x1c, 256, 2048, },
|
|
{ "AT45DB081", 0x24, 256, 4096, },
|
|
{ "AT45DB161", 0x2c, 512, 4096, },
|
|
{ "AT45DB321", 0x34, 512, 8192, },
|
|
{ "AT45DB642", 0x3c, 1024, 8192, },
|
|
{ NULL },
|
|
};
|
|
|
|
static void bcma_sflash_cmd(struct bcma_drv_cc *cc, u32 opcode)
|
|
{
|
|
int i;
|
|
bcma_cc_write32(cc, BCMA_CC_FLASHCTL,
|
|
BCMA_CC_FLASHCTL_START | opcode);
|
|
for (i = 0; i < 1000; i++) {
|
|
if (!(bcma_cc_read32(cc, BCMA_CC_FLASHCTL) &
|
|
BCMA_CC_FLASHCTL_BUSY))
|
|
return;
|
|
cpu_relax();
|
|
}
|
|
bcma_err(cc->core->bus, "SFLASH control command failed (timeout)!\n");
|
|
}
|
|
|
|
/* Initialize serial flash access */
|
|
int bcma_sflash_init(struct bcma_drv_cc *cc)
|
|
{
|
|
struct bcma_bus *bus = cc->core->bus;
|
|
struct bcma_sflash *sflash = &cc->sflash;
|
|
const struct bcma_sflash_tbl_e *e;
|
|
u32 id, id2;
|
|
|
|
switch (cc->capabilities & BCMA_CC_CAP_FLASHT) {
|
|
case BCMA_CC_FLASHT_STSER:
|
|
bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_DP);
|
|
|
|
bcma_cc_write32(cc, BCMA_CC_FLASHADDR, 0);
|
|
bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_RES);
|
|
id = bcma_cc_read32(cc, BCMA_CC_FLASHDATA);
|
|
|
|
bcma_cc_write32(cc, BCMA_CC_FLASHADDR, 1);
|
|
bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_ST_RES);
|
|
id2 = bcma_cc_read32(cc, BCMA_CC_FLASHDATA);
|
|
|
|
switch (id) {
|
|
case 0xbf:
|
|
for (e = bcma_sflash_sst_tbl; e->name; e++) {
|
|
if (e->id == id2)
|
|
break;
|
|
}
|
|
break;
|
|
case 0x13:
|
|
return -ENOTSUPP;
|
|
default:
|
|
for (e = bcma_sflash_st_tbl; e->name; e++) {
|
|
if (e->id == id)
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
if (!e->name) {
|
|
bcma_err(bus, "Unsupported ST serial flash (id: 0x%X, id2: 0x%X)\n", id, id2);
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
break;
|
|
case BCMA_CC_FLASHT_ATSER:
|
|
bcma_sflash_cmd(cc, BCMA_CC_FLASHCTL_AT_STATUS);
|
|
id = bcma_cc_read32(cc, BCMA_CC_FLASHDATA) & 0x3c;
|
|
|
|
for (e = bcma_sflash_at_tbl; e->name; e++) {
|
|
if (e->id == id)
|
|
break;
|
|
}
|
|
if (!e->name) {
|
|
bcma_err(bus, "Unsupported Atmel serial flash (id: 0x%X)\n", id);
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
break;
|
|
default:
|
|
bcma_err(bus, "Unsupported flash type\n");
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
sflash->window = BCMA_SOC_FLASH2;
|
|
sflash->blocksize = e->blocksize;
|
|
sflash->numblocks = e->numblocks;
|
|
sflash->size = sflash->blocksize * sflash->numblocks;
|
|
sflash->present = true;
|
|
|
|
bcma_info(bus, "Found %s serial flash (size: %dKiB, blocksize: 0x%X, blocks: %d)\n",
|
|
e->name, sflash->size / 1024, sflash->blocksize,
|
|
sflash->numblocks);
|
|
|
|
/* Prepare platform device, but don't register it yet. It's too early,
|
|
* malloc (required by device_private_init) is not available yet. */
|
|
bcma_sflash_dev.resource[0].end = bcma_sflash_dev.resource[0].start +
|
|
sflash->size;
|
|
bcma_sflash_dev.dev.platform_data = sflash;
|
|
|
|
return 0;
|
|
}
|