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-rw-r--r--drivers/mtd/devices/Kconfig1
-rw-r--r--drivers/mtd/devices/m25p80.c238
-rw-r--r--drivers/mtd/mtd_blkdevs.c20
-rw-r--r--drivers/mtd/mtdcore.c14
-rw-r--r--drivers/mtd/nand/raw/marvell_nand.c8
5 files changed, 101 insertions, 180 deletions
diff --git a/drivers/mtd/devices/Kconfig b/drivers/mtd/devices/Kconfig
index 6def5445e03e..57b02c4b3f63 100644
--- a/drivers/mtd/devices/Kconfig
+++ b/drivers/mtd/devices/Kconfig
@@ -81,6 +81,7 @@ config MTD_DATAFLASH_OTP
config MTD_M25P80
tristate "Support most SPI Flash chips (AT26DF, M25P, W25X, ...)"
depends on SPI_MASTER && MTD_SPI_NOR
+ select SPI_MEM
help
This enables access to most modern SPI flash chips, used for
program and data storage. Series supported include Atmel AT26DF,
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index a4e18f6aaa33..e84563d2067f 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -24,12 +24,13 @@
#include <linux/mtd/partitions.h>
#include <linux/spi/spi.h>
+#include <linux/spi/spi-mem.h>
#include <linux/spi/flash.h>
#include <linux/mtd/spi-nor.h>
#define MAX_CMD_SIZE 6
struct m25p {
- struct spi_device *spi;
+ struct spi_mem *spimem;
struct spi_nor spi_nor;
u8 command[MAX_CMD_SIZE];
};
@@ -37,97 +38,68 @@ struct m25p {
static int m25p80_read_reg(struct spi_nor *nor, u8 code, u8 *val, int len)
{
struct m25p *flash = nor->priv;
- struct spi_device *spi = flash->spi;
+ struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(code, 1),
+ SPI_MEM_OP_NO_ADDR,
+ SPI_MEM_OP_NO_DUMMY,
+ SPI_MEM_OP_DATA_IN(len, val, 1));
int ret;
- ret = spi_write_then_read(spi, &code, 1, val, len);
+ ret = spi_mem_exec_op(flash->spimem, &op);
if (ret < 0)
- dev_err(&spi->dev, "error %d reading %x\n", ret, code);
+ dev_err(&flash->spimem->spi->dev, "error %d reading %x\n", ret,
+ code);
return ret;
}
-static void m25p_addr2cmd(struct spi_nor *nor, unsigned int addr, u8 *cmd)
-{
- /* opcode is in cmd[0] */
- cmd[1] = addr >> (nor->addr_width * 8 - 8);
- cmd[2] = addr >> (nor->addr_width * 8 - 16);
- cmd[3] = addr >> (nor->addr_width * 8 - 24);
- cmd[4] = addr >> (nor->addr_width * 8 - 32);
-}
-
-static int m25p_cmdsz(struct spi_nor *nor)
-{
- return 1 + nor->addr_width;
-}
-
static int m25p80_write_reg(struct spi_nor *nor, u8 opcode, u8 *buf, int len)
{
struct m25p *flash = nor->priv;
- struct spi_device *spi = flash->spi;
-
- flash->command[0] = opcode;
- if (buf)
- memcpy(&flash->command[1], buf, len);
+ struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(opcode, 1),
+ SPI_MEM_OP_NO_ADDR,
+ SPI_MEM_OP_NO_DUMMY,
+ SPI_MEM_OP_DATA_OUT(len, buf, 1));
- return spi_write(spi, flash->command, len + 1);
+ return spi_mem_exec_op(flash->spimem, &op);
}
static ssize_t m25p80_write(struct spi_nor *nor, loff_t to, size_t len,
const u_char *buf)
{
struct m25p *flash = nor->priv;
- struct spi_device *spi = flash->spi;
- unsigned int inst_nbits, addr_nbits, data_nbits, data_idx;
- struct spi_transfer t[3] = {};
- struct spi_message m;
- int cmd_sz = m25p_cmdsz(nor);
- ssize_t ret;
+ struct spi_mem_op op =
+ SPI_MEM_OP(SPI_MEM_OP_CMD(nor->program_opcode, 1),
+ SPI_MEM_OP_ADDR(nor->addr_width, to, 1),
+ SPI_MEM_OP_DUMMY(0, 1),
+ SPI_MEM_OP_DATA_OUT(len, buf, 1));
+ size_t remaining = len;
+ int ret;
/* get transfer protocols. */
- inst_nbits = spi_nor_get_protocol_inst_nbits(nor->write_proto);
- addr_nbits = spi_nor_get_protocol_addr_nbits(nor->write_proto);
- data_nbits = spi_nor_get_protocol_data_nbits(nor->write_proto);
-
- spi_message_init(&m);
+ op.cmd.buswidth = spi_nor_get_protocol_inst_nbits(nor->write_proto);
+ op.addr.buswidth = spi_nor_get_protocol_addr_nbits(nor->write_proto);
+ op.dummy.buswidth = op.addr.buswidth;
+ op.data.buswidth = spi_nor_get_protocol_data_nbits(nor->write_proto);
if (nor->program_opcode == SPINOR_OP_AAI_WP && nor->sst_write_second)
- cmd_sz = 1;
-
- flash->command[0] = nor->program_opcode;
- m25p_addr2cmd(nor, to, flash->command);
+ op.addr.nbytes = 0;
- t[0].tx_buf = flash->command;
- t[0].tx_nbits = inst_nbits;
- t[0].len = cmd_sz;
- spi_message_add_tail(&t[0], &m);
-
- /* split the op code and address bytes into two transfers if needed. */
- data_idx = 1;
- if (addr_nbits != inst_nbits) {
- t[0].len = 1;
+ while (remaining) {
+ op.data.nbytes = remaining < UINT_MAX ? remaining : UINT_MAX;
+ ret = spi_mem_adjust_op_size(flash->spimem, &op);
+ if (ret)
+ return ret;
- t[1].tx_buf = &flash->command[1];
- t[1].tx_nbits = addr_nbits;
- t[1].len = cmd_sz - 1;
- spi_message_add_tail(&t[1], &m);
+ ret = spi_mem_exec_op(flash->spimem, &op);
+ if (ret)
+ return ret;
- data_idx = 2;
+ op.addr.val += op.data.nbytes;
+ remaining -= op.data.nbytes;
+ op.data.buf.out += op.data.nbytes;
}
- t[data_idx].tx_buf = buf;
- t[data_idx].tx_nbits = data_nbits;
- t[data_idx].len = len;
- spi_message_add_tail(&t[data_idx], &m);
-
- ret = spi_sync(spi, &m);
- if (ret)
- return ret;
-
- ret = m.actual_length - cmd_sz;
- if (ret < 0)
- return -EIO;
- return ret;
+ return len;
}
/*
@@ -138,92 +110,39 @@ static ssize_t m25p80_read(struct spi_nor *nor, loff_t from, size_t len,
u_char *buf)
{
struct m25p *flash = nor->priv;
- struct spi_device *spi = flash->spi;
- unsigned int inst_nbits, addr_nbits, data_nbits, data_idx;
- struct spi_transfer t[3];
- struct spi_message m;
- unsigned int dummy = nor->read_dummy;
- ssize_t ret;
- int cmd_sz;
+ struct spi_mem_op op =
+ SPI_MEM_OP(SPI_MEM_OP_CMD(nor->read_opcode, 1),
+ SPI_MEM_OP_ADDR(nor->addr_width, from, 1),
+ SPI_MEM_OP_DUMMY(nor->read_dummy, 1),
+ SPI_MEM_OP_DATA_IN(len, buf, 1));
+ size_t remaining = len;
+ int ret;
/* get transfer protocols. */
- inst_nbits = spi_nor_get_protocol_inst_nbits(nor->read_proto);
- addr_nbits = spi_nor_get_protocol_addr_nbits(nor->read_proto);
- data_nbits = spi_nor_get_protocol_data_nbits(nor->read_proto);
+ op.cmd.buswidth = spi_nor_get_protocol_inst_nbits(nor->read_proto);
+ op.addr.buswidth = spi_nor_get_protocol_addr_nbits(nor->read_proto);
+ op.dummy.buswidth = op.addr.buswidth;
+ op.data.buswidth = spi_nor_get_protocol_data_nbits(nor->read_proto);
/* convert the dummy cycles to the number of bytes */
- dummy = (dummy * addr_nbits) / 8;
-
- if (spi_flash_read_supported(spi)) {
- struct spi_flash_read_message msg;
-
- memset(&msg, 0, sizeof(msg));
+ op.dummy.nbytes = (nor->read_dummy * op.dummy.buswidth) / 8;
- msg.buf = buf;
- msg.from = from;
- msg.len = len;
- msg.read_opcode = nor->read_opcode;
- msg.addr_width = nor->addr_width;
- msg.dummy_bytes = dummy;
- msg.opcode_nbits = inst_nbits;
- msg.addr_nbits = addr_nbits;
- msg.data_nbits = data_nbits;
-
- ret = spi_flash_read(spi, &msg);
- if (ret < 0)
+ while (remaining) {
+ op.data.nbytes = remaining < UINT_MAX ? remaining : UINT_MAX;
+ ret = spi_mem_adjust_op_size(flash->spimem, &op);
+ if (ret)
return ret;
- return msg.retlen;
- }
- spi_message_init(&m);
- memset(t, 0, (sizeof t));
-
- flash->command[0] = nor->read_opcode;
- m25p_addr2cmd(nor, from, flash->command);
-
- t[0].tx_buf = flash->command;
- t[0].tx_nbits = inst_nbits;
- t[0].len = m25p_cmdsz(nor) + dummy;
- spi_message_add_tail(&t[0], &m);
-
- /*
- * Set all dummy/mode cycle bits to avoid sending some manufacturer
- * specific pattern, which might make the memory enter its Continuous
- * Read mode by mistake.
- * Based on the different mode cycle bit patterns listed and described
- * in the JESD216B specification, the 0xff value works for all memories
- * and all manufacturers.
- */
- cmd_sz = t[0].len;
- memset(flash->command + cmd_sz - dummy, 0xff, dummy);
-
- /* split the op code and address bytes into two transfers if needed. */
- data_idx = 1;
- if (addr_nbits != inst_nbits) {
- t[0].len = 1;
-
- t[1].tx_buf = &flash->command[1];
- t[1].tx_nbits = addr_nbits;
- t[1].len = cmd_sz - 1;
- spi_message_add_tail(&t[1], &m);
+ ret = spi_mem_exec_op(flash->spimem, &op);
+ if (ret)
+ return ret;
- data_idx = 2;
+ op.addr.val += op.data.nbytes;
+ remaining -= op.data.nbytes;
+ op.data.buf.in += op.data.nbytes;
}
- t[data_idx].rx_buf = buf;
- t[data_idx].rx_nbits = data_nbits;
- t[data_idx].len = min3(len, spi_max_transfer_size(spi),
- spi_max_message_size(spi) - cmd_sz);
- spi_message_add_tail(&t[data_idx], &m);
-
- ret = spi_sync(spi, &m);
- if (ret)
- return ret;
-
- ret = m.actual_length - cmd_sz;
- if (ret < 0)
- return -EIO;
- return ret;
+ return len;
}
/*
@@ -231,8 +150,9 @@ static ssize_t m25p80_read(struct spi_nor *nor, loff_t from, size_t len,
* matches what the READ command supports, at least until this driver
* understands FAST_READ (for clocks over 25 MHz).
*/
-static int m25p_probe(struct spi_device *spi)
+static int m25p_probe(struct spi_mem *spimem)
{
+ struct spi_device *spi = spimem->spi;
struct flash_platform_data *data;
struct m25p *flash;
struct spi_nor *nor;
@@ -244,9 +164,9 @@ static int m25p_probe(struct spi_device *spi)
char *flash_name;
int ret;
- data = dev_get_platdata(&spi->dev);
+ data = dev_get_platdata(&spimem->spi->dev);
- flash = devm_kzalloc(&spi->dev, sizeof(*flash), GFP_KERNEL);
+ flash = devm_kzalloc(&spimem->spi->dev, sizeof(*flash), GFP_KERNEL);
if (!flash)
return -ENOMEM;
@@ -258,12 +178,12 @@ static int m25p_probe(struct spi_device *spi)
nor->write_reg = m25p80_write_reg;
nor->read_reg = m25p80_read_reg;
- nor->dev = &spi->dev;
+ nor->dev = &spimem->spi->dev;
spi_nor_set_flash_node(nor, spi->dev.of_node);
nor->priv = flash;
- spi_set_drvdata(spi, flash);
- flash->spi = spi;
+ spi_mem_set_drvdata(spimem, flash);
+ flash->spimem = spimem;
if (spi->mode & SPI_RX_QUAD) {
hwcaps.mask |= SNOR_HWCAPS_READ_1_1_4;
@@ -303,9 +223,9 @@ static int m25p_probe(struct spi_device *spi)
}
-static int m25p_remove(struct spi_device *spi)
+static int m25p_remove(struct spi_mem *spimem)
{
- struct m25p *flash = spi_get_drvdata(spi);
+ struct m25p *flash = spi_mem_get_drvdata(spimem);
spi_nor_restore(&flash->spi_nor);
@@ -313,9 +233,9 @@ static int m25p_remove(struct spi_device *spi)
return mtd_device_unregister(&flash->spi_nor.mtd);
}
-static void m25p_shutdown(struct spi_device *spi)
+static void m25p_shutdown(struct spi_mem *spimem)
{
- struct m25p *flash = spi_get_drvdata(spi);
+ struct m25p *flash = spi_mem_get_drvdata(spimem);
spi_nor_restore(&flash->spi_nor);
}
@@ -386,12 +306,14 @@ static const struct of_device_id m25p_of_table[] = {
};
MODULE_DEVICE_TABLE(of, m25p_of_table);
-static struct spi_driver m25p80_driver = {
- .driver = {
- .name = "m25p80",
- .of_match_table = m25p_of_table,
+static struct spi_mem_driver m25p80_driver = {
+ .spidrv = {
+ .driver = {
+ .name = "m25p80",
+ .of_match_table = m25p_of_table,
+ },
+ .id_table = m25p_ids,
},
- .id_table = m25p_ids,
.probe = m25p_probe,
.remove = m25p_remove,
.shutdown = m25p_shutdown,
@@ -402,7 +324,7 @@ static struct spi_driver m25p80_driver = {
*/
};
-module_spi_driver(m25p80_driver);
+module_spi_mem_driver(m25p80_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mike Lavender");
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 16ae4ae8e8f9..29c0bfd74e8a 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -82,7 +82,6 @@ static blk_status_t do_blktrans_request(struct mtd_blktrans_ops *tr,
block = blk_rq_pos(req) << 9 >> tr->blkshift;
nsect = blk_rq_cur_bytes(req) >> tr->blkshift;
- buf = bio_data(req->bio);
if (req_op(req) == REQ_OP_FLUSH) {
if (tr->flush(dev))
@@ -100,9 +99,14 @@ static blk_status_t do_blktrans_request(struct mtd_blktrans_ops *tr,
return BLK_STS_IOERR;
return BLK_STS_OK;
case REQ_OP_READ:
- for (; nsect > 0; nsect--, block++, buf += tr->blksize)
- if (tr->readsect(dev, block, buf))
+ buf = kmap(bio_page(req->bio)) + bio_offset(req->bio);
+ for (; nsect > 0; nsect--, block++, buf += tr->blksize) {
+ if (tr->readsect(dev, block, buf)) {
+ kunmap(bio_page(req->bio));
return BLK_STS_IOERR;
+ }
+ }
+ kunmap(bio_page(req->bio));
rq_flush_dcache_pages(req);
return BLK_STS_OK;
case REQ_OP_WRITE:
@@ -110,9 +114,14 @@ static blk_status_t do_blktrans_request(struct mtd_blktrans_ops *tr,
return BLK_STS_IOERR;
rq_flush_dcache_pages(req);
- for (; nsect > 0; nsect--, block++, buf += tr->blksize)
- if (tr->writesect(dev, block, buf))
+ buf = kmap(bio_page(req->bio)) + bio_offset(req->bio);
+ for (; nsect > 0; nsect--, block++, buf += tr->blksize) {
+ if (tr->writesect(dev, block, buf)) {
+ kunmap(bio_page(req->bio));
return BLK_STS_IOERR;
+ }
+ }
+ kunmap(bio_page(req->bio));
return BLK_STS_OK;
default:
return BLK_STS_IOERR;
@@ -418,7 +427,6 @@ int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new)
new->rq->queuedata = new;
blk_queue_logical_block_size(new->rq, tr->blksize);
- blk_queue_bounce_limit(new->rq, BLK_BOUNCE_HIGH);
blk_queue_flag_set(QUEUE_FLAG_NONROT, new->rq);
blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, new->rq);
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index 807d17d863b3..64a1fcaafd9a 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -1829,18 +1829,6 @@ static int mtd_proc_show(struct seq_file *m, void *v)
mutex_unlock(&mtd_table_mutex);
return 0;
}
-
-static int mtd_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, mtd_proc_show, NULL);
-}
-
-static const struct file_operations mtd_proc_ops = {
- .open = mtd_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
#endif /* CONFIG_PROC_FS */
/*====================================================================*/
@@ -1883,7 +1871,7 @@ static int __init init_mtd(void)
goto err_bdi;
}
- proc_mtd = proc_create("mtd", 0, NULL, &mtd_proc_ops);
+ proc_mtd = proc_create_single("mtd", 0, NULL, mtd_proc_show);
ret = init_mtdchar();
if (ret)
diff --git a/drivers/mtd/nand/raw/marvell_nand.c b/drivers/mtd/nand/raw/marvell_nand.c
index db5ec4e8bde9..ebb1d141b900 100644
--- a/drivers/mtd/nand/raw/marvell_nand.c
+++ b/drivers/mtd/nand/raw/marvell_nand.c
@@ -1194,11 +1194,13 @@ static void marvell_nfc_hw_ecc_bch_read_chunk(struct nand_chip *chip, int chunk,
NDCB0_CMD2(NAND_CMD_READSTART);
/*
- * Trigger the naked read operation only on the last chunk.
- * Otherwise, use monolithic read.
+ * Trigger the monolithic read on the first chunk, then naked read on
+ * intermediate chunks and finally a last naked read on the last chunk.
*/
- if (lt->nchunks == 1 || (chunk < lt->nchunks - 1))
+ if (chunk == 0)
nfc_op.ndcb[0] |= NDCB0_CMD_XTYPE(XTYPE_MONOLITHIC_RW);
+ else if (chunk < lt->nchunks - 1)
+ nfc_op.ndcb[0] |= NDCB0_CMD_XTYPE(XTYPE_NAKED_RW);
else
nfc_op.ndcb[0] |= NDCB0_CMD_XTYPE(XTYPE_LAST_NAKED_RW);
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