aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/mtd/devices/m25p80.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mtd/devices/m25p80.c')
-rw-r--r--drivers/mtd/devices/m25p80.c334
1 files changed, 196 insertions, 138 deletions
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 4c19269de91a..f3f4768d6e18 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -22,6 +22,7 @@
#include <linux/mutex.h>
#include <linux/math64.h>
#include <linux/sched.h>
+#include <linux/mod_devicetable.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
@@ -29,9 +30,6 @@
#include <linux/spi/spi.h>
#include <linux/spi/flash.h>
-
-#define FLASH_PAGESIZE 256
-
/* Flash opcodes. */
#define OPCODE_WREN 0x06 /* Write enable */
#define OPCODE_RDSR 0x05 /* Read status register */
@@ -61,7 +59,7 @@
/* Define max times to check status register before we give up. */
#define MAX_READY_WAIT_JIFFIES (40 * HZ) /* M25P16 specs 40s max chip erase */
-#define CMD_SIZE 4
+#define MAX_CMD_SIZE 4
#ifdef CONFIG_M25PXX_USE_FAST_READ
#define OPCODE_READ OPCODE_FAST_READ
@@ -78,8 +76,10 @@ struct m25p {
struct mutex lock;
struct mtd_info mtd;
unsigned partitioned:1;
+ u16 page_size;
+ u16 addr_width;
u8 erase_opcode;
- u8 command[CMD_SIZE + FAST_READ_DUMMY_BYTE];
+ u8 *command;
};
static inline struct m25p *mtd_to_m25p(struct mtd_info *mtd)
@@ -198,6 +198,19 @@ static int erase_chip(struct m25p *flash)
return 0;
}
+static void m25p_addr2cmd(struct m25p *flash, unsigned int addr, u8 *cmd)
+{
+ /* opcode is in cmd[0] */
+ cmd[1] = addr >> (flash->addr_width * 8 - 8);
+ cmd[2] = addr >> (flash->addr_width * 8 - 16);
+ cmd[3] = addr >> (flash->addr_width * 8 - 24);
+}
+
+static int m25p_cmdsz(struct m25p *flash)
+{
+ return 1 + flash->addr_width;
+}
+
/*
* Erase one sector of flash memory at offset ``offset'' which is any
* address within the sector which should be erased.
@@ -219,11 +232,9 @@ static int erase_sector(struct m25p *flash, u32 offset)
/* Set up command buffer. */
flash->command[0] = flash->erase_opcode;
- flash->command[1] = offset >> 16;
- flash->command[2] = offset >> 8;
- flash->command[3] = offset;
+ m25p_addr2cmd(flash, offset, flash->command);
- spi_write(flash->spi, flash->command, CMD_SIZE);
+ spi_write(flash->spi, flash->command, m25p_cmdsz(flash));
return 0;
}
@@ -325,7 +336,7 @@ static int m25p80_read(struct mtd_info *mtd, loff_t from, size_t len,
* Should add 1 byte DUMMY_BYTE.
*/
t[0].tx_buf = flash->command;
- t[0].len = CMD_SIZE + FAST_READ_DUMMY_BYTE;
+ t[0].len = m25p_cmdsz(flash) + FAST_READ_DUMMY_BYTE;
spi_message_add_tail(&t[0], &m);
t[1].rx_buf = buf;
@@ -352,13 +363,11 @@ static int m25p80_read(struct mtd_info *mtd, loff_t from, size_t len,
/* Set up the write data buffer. */
flash->command[0] = OPCODE_READ;
- flash->command[1] = from >> 16;
- flash->command[2] = from >> 8;
- flash->command[3] = from;
+ m25p_addr2cmd(flash, from, flash->command);
spi_sync(flash->spi, &m);
- *retlen = m.actual_length - CMD_SIZE - FAST_READ_DUMMY_BYTE;
+ *retlen = m.actual_length - m25p_cmdsz(flash) - FAST_READ_DUMMY_BYTE;
mutex_unlock(&flash->lock);
@@ -396,7 +405,7 @@ static int m25p80_write(struct mtd_info *mtd, loff_t to, size_t len,
memset(t, 0, (sizeof t));
t[0].tx_buf = flash->command;
- t[0].len = CMD_SIZE;
+ t[0].len = m25p_cmdsz(flash);
spi_message_add_tail(&t[0], &m);
t[1].tx_buf = buf;
@@ -414,41 +423,36 @@ static int m25p80_write(struct mtd_info *mtd, loff_t to, size_t len,
/* Set up the opcode in the write buffer. */
flash->command[0] = OPCODE_PP;
- flash->command[1] = to >> 16;
- flash->command[2] = to >> 8;
- flash->command[3] = to;
+ m25p_addr2cmd(flash, to, flash->command);
- /* what page do we start with? */
- page_offset = to % FLASH_PAGESIZE;
+ page_offset = to & (flash->page_size - 1);
/* do all the bytes fit onto one page? */
- if (page_offset + len <= FLASH_PAGESIZE) {
+ if (page_offset + len <= flash->page_size) {
t[1].len = len;
spi_sync(flash->spi, &m);
- *retlen = m.actual_length - CMD_SIZE;
+ *retlen = m.actual_length - m25p_cmdsz(flash);
} else {
u32 i;
/* the size of data remaining on the first page */
- page_size = FLASH_PAGESIZE - page_offset;
+ page_size = flash->page_size - page_offset;
t[1].len = page_size;
spi_sync(flash->spi, &m);
- *retlen = m.actual_length - CMD_SIZE;
+ *retlen = m.actual_length - m25p_cmdsz(flash);
- /* write everything in PAGESIZE chunks */
+ /* write everything in flash->page_size chunks */
for (i = page_size; i < len; i += page_size) {
page_size = len - i;
- if (page_size > FLASH_PAGESIZE)
- page_size = FLASH_PAGESIZE;
+ if (page_size > flash->page_size)
+ page_size = flash->page_size;
/* write the next page to flash */
- flash->command[1] = (to + i) >> 16;
- flash->command[2] = (to + i) >> 8;
- flash->command[3] = (to + i);
+ m25p_addr2cmd(flash, to + i, flash->command);
t[1].tx_buf = buf + i;
t[1].len = page_size;
@@ -460,7 +464,7 @@ static int m25p80_write(struct mtd_info *mtd, loff_t to, size_t len,
spi_sync(flash->spi, &m);
if (retlen)
- *retlen += m.actual_length - CMD_SIZE;
+ *retlen += m.actual_length - m25p_cmdsz(flash);
}
}
@@ -492,7 +496,7 @@ static int sst_write(struct mtd_info *mtd, loff_t to, size_t len,
memset(t, 0, (sizeof t));
t[0].tx_buf = flash->command;
- t[0].len = CMD_SIZE;
+ t[0].len = m25p_cmdsz(flash);
spi_message_add_tail(&t[0], &m);
t[1].tx_buf = buf;
@@ -511,9 +515,7 @@ static int sst_write(struct mtd_info *mtd, loff_t to, size_t len,
/* Start write from odd address. */
if (actual) {
flash->command[0] = OPCODE_BP;
- flash->command[1] = to >> 16;
- flash->command[2] = to >> 8;
- flash->command[3] = to;
+ m25p_addr2cmd(flash, to, flash->command);
/* write one byte. */
t[1].len = 1;
@@ -521,17 +523,15 @@ static int sst_write(struct mtd_info *mtd, loff_t to, size_t len,
ret = wait_till_ready(flash);
if (ret)
goto time_out;
- *retlen += m.actual_length - CMD_SIZE;
+ *retlen += m.actual_length - m25p_cmdsz(flash);
}
to += actual;
flash->command[0] = OPCODE_AAI_WP;
- flash->command[1] = to >> 16;
- flash->command[2] = to >> 8;
- flash->command[3] = to;
+ m25p_addr2cmd(flash, to, flash->command);
/* Write out most of the data here. */
- cmd_sz = CMD_SIZE;
+ cmd_sz = m25p_cmdsz(flash);
for (; actual < len - 1; actual += 2) {
t[0].len = cmd_sz;
/* write two bytes. */
@@ -555,10 +555,8 @@ static int sst_write(struct mtd_info *mtd, loff_t to, size_t len,
if (actual != len) {
write_enable(flash);
flash->command[0] = OPCODE_BP;
- flash->command[1] = to >> 16;
- flash->command[2] = to >> 8;
- flash->command[3] = to;
- t[0].len = CMD_SIZE;
+ m25p_addr2cmd(flash, to, flash->command);
+ t[0].len = m25p_cmdsz(flash);
t[1].len = 1;
t[1].tx_buf = buf + actual;
@@ -566,7 +564,7 @@ static int sst_write(struct mtd_info *mtd, loff_t to, size_t len,
ret = wait_till_ready(flash);
if (ret)
goto time_out;
- *retlen += m.actual_length - CMD_SIZE;
+ *retlen += m.actual_length - m25p_cmdsz(flash);
write_disable(flash);
}
@@ -582,8 +580,6 @@ time_out:
*/
struct flash_info {
- char *name;
-
/* JEDEC id zero means "no ID" (most older chips); otherwise it has
* a high byte of zero plus three data bytes: the manufacturer id,
* then a two byte device id.
@@ -597,87 +593,119 @@ struct flash_info {
unsigned sector_size;
u16 n_sectors;
+ u16 page_size;
+ u16 addr_width;
+
u16 flags;
#define SECT_4K 0x01 /* OPCODE_BE_4K works uniformly */
+#define M25P_NO_ERASE 0x02 /* No erase command needed */
};
+#define INFO(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
+ ((kernel_ulong_t)&(struct flash_info) { \
+ .jedec_id = (_jedec_id), \
+ .ext_id = (_ext_id), \
+ .sector_size = (_sector_size), \
+ .n_sectors = (_n_sectors), \
+ .page_size = 256, \
+ .addr_width = 3, \
+ .flags = (_flags), \
+ })
+
+#define CAT25_INFO(_sector_size, _n_sectors, _page_size, _addr_width) \
+ ((kernel_ulong_t)&(struct flash_info) { \
+ .sector_size = (_sector_size), \
+ .n_sectors = (_n_sectors), \
+ .page_size = (_page_size), \
+ .addr_width = (_addr_width), \
+ .flags = M25P_NO_ERASE, \
+ })
/* NOTE: double check command sets and memory organization when you add
* more flash chips. This current list focusses on newer chips, which
* have been converging on command sets which including JEDEC ID.
*/
-static struct flash_info __devinitdata m25p_data [] = {
-
+static const struct spi_device_id m25p_ids[] = {
/* Atmel -- some are (confusingly) marketed as "DataFlash" */
- { "at25fs010", 0x1f6601, 0, 32 * 1024, 4, SECT_4K, },
- { "at25fs040", 0x1f6604, 0, 64 * 1024, 8, SECT_4K, },
+ { "at25fs010", INFO(0x1f6601, 0, 32 * 1024, 4, SECT_4K) },
+ { "at25fs040", INFO(0x1f6604, 0, 64 * 1024, 8, SECT_4K) },
- { "at25df041a", 0x1f4401, 0, 64 * 1024, 8, SECT_4K, },
- { "at25df641", 0x1f4800, 0, 64 * 1024, 128, SECT_4K, },
+ { "at25df041a", INFO(0x1f4401, 0, 64 * 1024, 8, SECT_4K) },
+ { "at25df641", INFO(0x1f4800, 0, 64 * 1024, 128, SECT_4K) },
- { "at26f004", 0x1f0400, 0, 64 * 1024, 8, SECT_4K, },
- { "at26df081a", 0x1f4501, 0, 64 * 1024, 16, SECT_4K, },
- { "at26df161a", 0x1f4601, 0, 64 * 1024, 32, SECT_4K, },
- { "at26df321", 0x1f4701, 0, 64 * 1024, 64, SECT_4K, },
+ { "at26f004", INFO(0x1f0400, 0, 64 * 1024, 8, SECT_4K) },
+ { "at26df081a", INFO(0x1f4501, 0, 64 * 1024, 16, SECT_4K) },
+ { "at26df161a", INFO(0x1f4601, 0, 64 * 1024, 32, SECT_4K) },
+ { "at26df321", INFO(0x1f4701, 0, 64 * 1024, 64, SECT_4K) },
/* Macronix */
- { "mx25l3205d", 0xc22016, 0, 64 * 1024, 64, },
- { "mx25l6405d", 0xc22017, 0, 64 * 1024, 128, },
- { "mx25l12805d", 0xc22018, 0, 64 * 1024, 256, },
- { "mx25l12855e", 0xc22618, 0, 64 * 1024, 256, },
+ { "mx25l4005a", INFO(0xc22013, 0, 64 * 1024, 8, SECT_4K) },
+ { "mx25l3205d", INFO(0xc22016, 0, 64 * 1024, 64, 0) },
+ { "mx25l6405d", INFO(0xc22017, 0, 64 * 1024, 128, 0) },
+ { "mx25l12805d", INFO(0xc22018, 0, 64 * 1024, 256, 0) },
+ { "mx25l12855e", INFO(0xc22618, 0, 64 * 1024, 256, 0) },
/* Spansion -- single (large) sector size only, at least
* for the chips listed here (without boot sectors).
*/
- { "s25sl004a", 0x010212, 0, 64 * 1024, 8, },
- { "s25sl008a", 0x010213, 0, 64 * 1024, 16, },
- { "s25sl016a", 0x010214, 0, 64 * 1024, 32, },
- { "s25sl032a", 0x010215, 0, 64 * 1024, 64, },
- { "s25sl064a", 0x010216, 0, 64 * 1024, 128, },
- { "s25sl12800", 0x012018, 0x0300, 256 * 1024, 64, },
- { "s25sl12801", 0x012018, 0x0301, 64 * 1024, 256, },
- { "s25fl129p0", 0x012018, 0x4d00, 256 * 1024, 64, },
- { "s25fl129p1", 0x012018, 0x4d01, 64 * 1024, 256, },
+ { "s25sl004a", INFO(0x010212, 0, 64 * 1024, 8, 0) },
+ { "s25sl008a", INFO(0x010213, 0, 64 * 1024, 16, 0) },
+ { "s25sl016a", INFO(0x010214, 0, 64 * 1024, 32, 0) },
+ { "s25sl032a", INFO(0x010215, 0, 64 * 1024, 64, 0) },
+ { "s25sl064a", INFO(0x010216, 0, 64 * 1024, 128, 0) },
+ { "s25sl12800", INFO(0x012018, 0x0300, 256 * 1024, 64, 0) },
+ { "s25sl12801", INFO(0x012018, 0x0301, 64 * 1024, 256, 0) },
+ { "s25fl129p0", INFO(0x012018, 0x4d00, 256 * 1024, 64, 0) },
+ { "s25fl129p1", INFO(0x012018, 0x4d01, 64 * 1024, 256, 0) },
/* SST -- large erase sizes are "overlays", "sectors" are 4K */
- { "sst25vf040b", 0xbf258d, 0, 64 * 1024, 8, SECT_4K, },
- { "sst25vf080b", 0xbf258e, 0, 64 * 1024, 16, SECT_4K, },
- { "sst25vf016b", 0xbf2541, 0, 64 * 1024, 32, SECT_4K, },
- { "sst25vf032b", 0xbf254a, 0, 64 * 1024, 64, SECT_4K, },
- { "sst25wf512", 0xbf2501, 0, 64 * 1024, 1, SECT_4K, },
- { "sst25wf010", 0xbf2502, 0, 64 * 1024, 2, SECT_4K, },
- { "sst25wf020", 0xbf2503, 0, 64 * 1024, 4, SECT_4K, },
- { "sst25wf040", 0xbf2504, 0, 64 * 1024, 8, SECT_4K, },
+ { "sst25vf040b", INFO(0xbf258d, 0, 64 * 1024, 8, SECT_4K) },
+ { "sst25vf080b", INFO(0xbf258e, 0, 64 * 1024, 16, SECT_4K) },
+ { "sst25vf016b", INFO(0xbf2541, 0, 64 * 1024, 32, SECT_4K) },
+ { "sst25vf032b", INFO(0xbf254a, 0, 64 * 1024, 64, SECT_4K) },
+ { "sst25wf512", INFO(0xbf2501, 0, 64 * 1024, 1, SECT_4K) },
+ { "sst25wf010", INFO(0xbf2502, 0, 64 * 1024, 2, SECT_4K) },
+ { "sst25wf020", INFO(0xbf2503, 0, 64 * 1024, 4, SECT_4K) },
+ { "sst25wf040", INFO(0xbf2504, 0, 64 * 1024, 8, SECT_4K) },
/* ST Microelectronics -- newer production may have feature updates */
- { "m25p05", 0x202010, 0, 32 * 1024, 2, },
- { "m25p10", 0x202011, 0, 32 * 1024, 4, },
- { "m25p20", 0x202012, 0, 64 * 1024, 4, },
- { "m25p40", 0x202013, 0, 64 * 1024, 8, },
- { "m25p80", 0, 0, 64 * 1024, 16, },
- { "m25p16", 0x202015, 0, 64 * 1024, 32, },
- { "m25p32", 0x202016, 0, 64 * 1024, 64, },
- { "m25p64", 0x202017, 0, 64 * 1024, 128, },
- { "m25p128", 0x202018, 0, 256 * 1024, 64, },
-
- { "m45pe10", 0x204011, 0, 64 * 1024, 2, },
- { "m45pe80", 0x204014, 0, 64 * 1024, 16, },
- { "m45pe16", 0x204015, 0, 64 * 1024, 32, },
-
- { "m25pe80", 0x208014, 0, 64 * 1024, 16, },
- { "m25pe16", 0x208015, 0, 64 * 1024, 32, SECT_4K, },
+ { "m25p05", INFO(0x202010, 0, 32 * 1024, 2, 0) },
+ { "m25p10", INFO(0x202011, 0, 32 * 1024, 4, 0) },
+ { "m25p20", INFO(0x202012, 0, 64 * 1024, 4, 0) },
+ { "m25p40", INFO(0x202013, 0, 64 * 1024, 8, 0) },
+ { "m25p80", INFO(0x202014, 0, 64 * 1024, 16, 0) },
+ { "m25p16", INFO(0x202015, 0, 64 * 1024, 32, 0) },
+ { "m25p32", INFO(0x202016, 0, 64 * 1024, 64, 0) },
+ { "m25p64", INFO(0x202017, 0, 64 * 1024, 128, 0) },
+ { "m25p128", INFO(0x202018, 0, 256 * 1024, 64, 0) },
+
+ { "m45pe10", INFO(0x204011, 0, 64 * 1024, 2, 0) },
+ { "m45pe80", INFO(0x204014, 0, 64 * 1024, 16, 0) },
+ { "m45pe16", INFO(0x204015, 0, 64 * 1024, 32, 0) },
+
+ { "m25pe80", INFO(0x208014, 0, 64 * 1024, 16, 0) },
+ { "m25pe16", INFO(0x208015, 0, 64 * 1024, 32, SECT_4K) },
/* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */
- { "w25x10", 0xef3011, 0, 64 * 1024, 2, SECT_4K, },
- { "w25x20", 0xef3012, 0, 64 * 1024, 4, SECT_4K, },
- { "w25x40", 0xef3013, 0, 64 * 1024, 8, SECT_4K, },
- { "w25x80", 0xef3014, 0, 64 * 1024, 16, SECT_4K, },
- { "w25x16", 0xef3015, 0, 64 * 1024, 32, SECT_4K, },
- { "w25x32", 0xef3016, 0, 64 * 1024, 64, SECT_4K, },
- { "w25x64", 0xef3017, 0, 64 * 1024, 128, SECT_4K, },
+ { "w25x10", INFO(0xef3011, 0, 64 * 1024, 2, SECT_4K) },
+ { "w25x20", INFO(0xef3012, 0, 64 * 1024, 4, SECT_4K) },
+ { "w25x40", INFO(0xef3013, 0, 64 * 1024, 8, SECT_4K) },
+ { "w25x80", INFO(0xef3014, 0, 64 * 1024, 16, SECT_4K) },
+ { "w25x16", INFO(0xef3015, 0, 64 * 1024, 32, SECT_4K) },
+ { "w25x32", INFO(0xef3016, 0, 64 * 1024, 64, SECT_4K) },
+ { "w25x64", INFO(0xef3017, 0, 64 * 1024, 128, SECT_4K) },
+
+ /* Catalyst / On Semiconductor -- non-JEDEC */
+ { "cat25c11", CAT25_INFO( 16, 8, 16, 1) },
+ { "cat25c03", CAT25_INFO( 32, 8, 16, 2) },
+ { "cat25c09", CAT25_INFO( 128, 8, 32, 2) },
+ { "cat25c17", CAT25_INFO( 256, 8, 32, 2) },
+ { "cat25128", CAT25_INFO(2048, 8, 64, 2) },
+ { },
};
+MODULE_DEVICE_TABLE(spi, m25p_ids);
-static struct flash_info *__devinit jedec_probe(struct spi_device *spi)
+static const struct spi_device_id *__devinit jedec_probe(struct spi_device *spi)
{
int tmp;
u8 code = OPCODE_RDID;
@@ -702,18 +730,24 @@ static struct flash_info *__devinit jedec_probe(struct spi_device *spi)
jedec = jedec << 8;
jedec |= id[2];
+ /*
+ * Some chips (like Numonyx M25P80) have JEDEC and non-JEDEC variants,
+ * which depend on technology process. Officially RDID command doesn't
+ * exist for non-JEDEC chips, but for compatibility they return ID 0.
+ */
+ if (jedec == 0)
+ return NULL;
+
ext_jedec = id[3] << 8 | id[4];
- for (tmp = 0, info = m25p_data;
- tmp < ARRAY_SIZE(m25p_data);
- tmp++, info++) {
+ for (tmp = 0; tmp < ARRAY_SIZE(m25p_ids) - 1; tmp++) {
+ info = (void *)m25p_ids[tmp].driver_data;
if (info->jedec_id == jedec) {
if (info->ext_id != 0 && info->ext_id != ext_jedec)
continue;
- return info;
+ return &m25p_ids[tmp];
}
}
- dev_err(&spi->dev, "unrecognized JEDEC id %06x\n", jedec);
return NULL;
}
@@ -725,6 +759,7 @@ static struct flash_info *__devinit jedec_probe(struct spi_device *spi)
*/
static int __devinit m25p_probe(struct spi_device *spi)
{
+ const struct spi_device_id *id = spi_get_device_id(spi);
struct flash_platform_data *data;
struct m25p *flash;
struct flash_info *info;
@@ -737,50 +772,65 @@ static int __devinit m25p_probe(struct spi_device *spi)
*/
data = spi->dev.platform_data;
if (data && data->type) {
- for (i = 0, info = m25p_data;
- i < ARRAY_SIZE(m25p_data);
- i++, info++) {
- if (strcmp(data->type, info->name) == 0)
- break;
- }
+ const struct spi_device_id *plat_id;
- /* unrecognized chip? */
- if (i == ARRAY_SIZE(m25p_data)) {
- DEBUG(MTD_DEBUG_LEVEL0, "%s: unrecognized id %s\n",
- dev_name(&spi->dev), data->type);
- info = NULL;
-
- /* recognized; is that chip really what's there? */
- } else if (info->jedec_id) {
- struct flash_info *chip = jedec_probe(spi);
-
- if (!chip || chip != info) {
- dev_warn(&spi->dev, "found %s, expected %s\n",
- chip ? chip->name : "UNKNOWN",
- info->name);
- info = NULL;
- }
+ for (i = 0; i < ARRAY_SIZE(m25p_ids) - 1; i++) {
+ plat_id = &m25p_ids[i];
+ if (strcmp(data->type, plat_id->name))
+ continue;
+ break;
}
- } else
- info = jedec_probe(spi);
- if (!info)
- return -ENODEV;
+ if (plat_id)
+ id = plat_id;
+ else
+ dev_warn(&spi->dev, "unrecognized id %s\n", data->type);
+ }
+
+ info = (void *)id->driver_data;
+
+ if (info->jedec_id) {
+ const struct spi_device_id *jid;
+
+ jid = jedec_probe(spi);
+ if (!jid) {
+ dev_info(&spi->dev, "non-JEDEC variant of %s\n",
+ id->name);
+ } else if (jid != id) {
+ /*
+ * JEDEC knows better, so overwrite platform ID. We
+ * can't trust partitions any longer, but we'll let
+ * mtd apply them anyway, since some partitions may be
+ * marked read-only, and we don't want to lose that
+ * information, even if it's not 100% accurate.
+ */
+ dev_warn(&spi->dev, "found %s, expected %s\n",
+ jid->name, id->name);
+ id = jid;
+ info = (void *)jid->driver_data;
+ }
+ }
flash = kzalloc(sizeof *flash, GFP_KERNEL);
if (!flash)
return -ENOMEM;
+ flash->command = kmalloc(MAX_CMD_SIZE + FAST_READ_DUMMY_BYTE, GFP_KERNEL);
+ if (!flash->command) {
+ kfree(flash);
+ return -ENOMEM;
+ }
flash->spi = spi;
mutex_init(&flash->lock);
dev_set_drvdata(&spi->dev, flash);
/*
- * Atmel serial flash tend to power up
- * with the software protection bits set
+ * Atmel and SST serial flash tend to power
+ * up with the software protection bits set
*/
- if (info->jedec_id >> 16 == 0x1f) {
+ if (info->jedec_id >> 16 == 0x1f ||
+ info->jedec_id >> 16 == 0xbf) {
write_enable(flash);
write_sr(flash, 0);
}
@@ -812,9 +862,14 @@ static int __devinit m25p_probe(struct spi_device *spi)
flash->mtd.erasesize = info->sector_size;
}
+ if (info->flags & M25P_NO_ERASE)
+ flash->mtd.flags |= MTD_NO_ERASE;
+
flash->mtd.dev.parent = &spi->dev;
+ flash->page_size = info->page_size;
+ flash->addr_width = info->addr_width;
- dev_info(&spi->dev, "%s (%lld Kbytes)\n", info->name,
+ dev_info(&spi->dev, "%s (%lld Kbytes)\n", id->name,
(long long)flash->mtd.size >> 10);
DEBUG(MTD_DEBUG_LEVEL2,
@@ -888,8 +943,10 @@ static int __devexit m25p_remove(struct spi_device *spi)
status = del_mtd_partitions(&flash->mtd);
else
status = del_mtd_device(&flash->mtd);
- if (status == 0)
+ if (status == 0) {
+ kfree(flash->command);
kfree(flash);
+ }
return 0;
}
@@ -900,6 +957,7 @@ static struct spi_driver m25p80_driver = {
.bus = &spi_bus_type,
.owner = THIS_MODULE,
},
+ .id_table = m25p_ids,
.probe = m25p_probe,
.remove = __devexit_p(m25p_remove),
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.