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path: root/drivers/mtd/devices/m25p80.c
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Diffstat (limited to 'drivers/mtd/devices/m25p80.c')
-rw-r--r--drivers/mtd/devices/m25p80.c48
1 files changed, 30 insertions, 18 deletions
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 03838bab1f59..4eeeb2d7f6ea 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -73,14 +73,6 @@
#define MAX_READY_WAIT_JIFFIES (40 * HZ) /* M25P16 specs 40s max chip erase */
#define MAX_CMD_SIZE 5
-#ifdef CONFIG_M25PXX_USE_FAST_READ
-#define OPCODE_READ OPCODE_FAST_READ
-#define FAST_READ_DUMMY_BYTE 1
-#else
-#define OPCODE_READ OPCODE_NORM_READ
-#define FAST_READ_DUMMY_BYTE 0
-#endif
-
#define JEDEC_MFR(_jedec_id) ((_jedec_id) >> 16)
/****************************************************************************/
@@ -93,6 +85,7 @@ struct m25p {
u16 addr_width;
u8 erase_opcode;
u8 *command;
+ bool fast_read;
};
static inline struct m25p *mtd_to_m25p(struct mtd_info *mtd)
@@ -168,6 +161,7 @@ static inline int set_4byte(struct m25p *flash, u32 jedec_id, int enable)
{
switch (JEDEC_MFR(jedec_id)) {
case CFI_MFR_MACRONIX:
+ case 0xEF /* winbond */:
flash->command[0] = enable ? OPCODE_EN4B : OPCODE_EX4B;
return spi_write(flash->spi, flash->command, 1);
default:
@@ -342,6 +336,7 @@ static int m25p80_read(struct mtd_info *mtd, loff_t from, size_t len,
struct m25p *flash = mtd_to_m25p(mtd);
struct spi_transfer t[2];
struct spi_message m;
+ uint8_t opcode;
pr_debug("%s: %s from 0x%08x, len %zd\n", dev_name(&flash->spi->dev),
__func__, (u32)from, len);
@@ -354,7 +349,7 @@ 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 = m25p_cmdsz(flash) + FAST_READ_DUMMY_BYTE;
+ t[0].len = m25p_cmdsz(flash) + (flash->fast_read ? 1 : 0);
spi_message_add_tail(&t[0], &m);
t[1].rx_buf = buf;
@@ -376,12 +371,14 @@ 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;
+ opcode = flash->fast_read ? OPCODE_FAST_READ : OPCODE_NORM_READ;
+ flash->command[0] = opcode;
m25p_addr2cmd(flash, from, flash->command);
spi_sync(flash->spi, &m);
- *retlen = m.actual_length - m25p_cmdsz(flash) - FAST_READ_DUMMY_BYTE;
+ *retlen = m.actual_length - m25p_cmdsz(flash) -
+ (flash->fast_read ? 1 : 0);
mutex_unlock(&flash->lock);
@@ -664,7 +661,8 @@ static const struct spi_device_id m25p_ids[] = {
{ "mx25l25655e", INFO(0xc22619, 0, 64 * 1024, 512, 0) },
/* Micron */
- { "n25q128", INFO(0x20ba18, 0, 64 * 1024, 256, 0) },
+ { "n25q128a11", INFO(0x20bb18, 0, 64 * 1024, 256, 0) },
+ { "n25q128a13", INFO(0x20ba18, 0, 64 * 1024, 256, 0) },
{ "n25q256a", INFO(0x20ba19, 0, 64 * 1024, 512, SECT_4K) },
/* Spansion -- single (large) sector size only, at least
@@ -745,6 +743,8 @@ static const struct spi_device_id m25p_ids[] = {
{ "w25x64", INFO(0xef3017, 0, 64 * 1024, 128, SECT_4K) },
{ "w25q64", INFO(0xef4017, 0, 64 * 1024, 128, SECT_4K) },
{ "w25q80", INFO(0xef5014, 0, 64 * 1024, 16, SECT_4K) },
+ { "w25q80bl", INFO(0xef4014, 0, 64 * 1024, 16, SECT_4K) },
+ { "w25q256", INFO(0xef4019, 0, 64 * 1024, 512, SECT_4K) },
/* Catalyst / On Semiconductor -- non-JEDEC */
{ "cat25c11", CAT25_INFO( 16, 8, 16, 1) },
@@ -756,7 +756,7 @@ static const struct spi_device_id m25p_ids[] = {
};
MODULE_DEVICE_TABLE(spi, m25p_ids);
-static const struct spi_device_id *__devinit jedec_probe(struct spi_device *spi)
+static const struct spi_device_id *jedec_probe(struct spi_device *spi)
{
int tmp;
u8 code = OPCODE_RDID;
@@ -801,7 +801,7 @@ static const struct spi_device_id *__devinit jedec_probe(struct spi_device *spi)
* matches what the READ command supports, at least until this driver
* understands FAST_READ (for clocks over 25 MHz).
*/
-static int __devinit m25p_probe(struct spi_device *spi)
+static int m25p_probe(struct spi_device *spi)
{
const struct spi_device_id *id = spi_get_device_id(spi);
struct flash_platform_data *data;
@@ -809,9 +809,10 @@ static int __devinit m25p_probe(struct spi_device *spi)
struct flash_info *info;
unsigned i;
struct mtd_part_parser_data ppdata;
+ struct device_node __maybe_unused *np = spi->dev.of_node;
#ifdef CONFIG_MTD_OF_PARTS
- if (!of_device_is_available(spi->dev.of_node))
+ if (!of_device_is_available(np))
return -ENODEV;
#endif
@@ -863,7 +864,8 @@ static int __devinit m25p_probe(struct spi_device *spi)
flash = kzalloc(sizeof *flash, GFP_KERNEL);
if (!flash)
return -ENOMEM;
- flash->command = kmalloc(MAX_CMD_SIZE + FAST_READ_DUMMY_BYTE, GFP_KERNEL);
+ flash->command = kmalloc(MAX_CMD_SIZE + (flash->fast_read ? 1 : 0),
+ GFP_KERNEL);
if (!flash->command) {
kfree(flash);
return -ENOMEM;
@@ -920,6 +922,16 @@ static int __devinit m25p_probe(struct spi_device *spi)
flash->page_size = info->page_size;
flash->mtd.writebufsize = flash->page_size;
+ flash->fast_read = false;
+#ifdef CONFIG_OF
+ if (np && of_property_read_bool(np, "m25p,fast-read"))
+ flash->fast_read = true;
+#endif
+
+#ifdef CONFIG_M25PXX_USE_FAST_READ
+ flash->fast_read = true;
+#endif
+
if (info->addr_width)
flash->addr_width = info->addr_width;
else {
@@ -961,7 +973,7 @@ static int __devinit m25p_probe(struct spi_device *spi)
}
-static int __devexit m25p_remove(struct spi_device *spi)
+static int m25p_remove(struct spi_device *spi)
{
struct m25p *flash = dev_get_drvdata(&spi->dev);
int status;
@@ -983,7 +995,7 @@ static struct spi_driver m25p80_driver = {
},
.id_table = m25p_ids,
.probe = m25p_probe,
- .remove = __devexit_p(m25p_remove),
+ .remove = m25p_remove,
/* REVISIT: many of these chips have deep power-down modes, which
* should clearly be entered on suspend() to minimize power use.
generated by cgit (git 2.34.1) at 2024-05-20 07:38:56 +0000