* [PATCH v5] mtd: spi-nor: Add support for S3AN spi-nor devices
@ 2016-09-16 19:33 Ricardo Ribalda Delgado
2016-09-20 9:52 ` Cyrille Pitchen
` (2 more replies)
0 siblings, 3 replies; 7+ messages in thread
From: Ricardo Ribalda Delgado @ 2016-09-16 19:33 UTC (permalink / raw)
To: Cyrille Pitchen, David Woodhouse, Brian Norris,
Javier Martinez Canillas, Boris Brezillon, Stephen Warren,
Jagan Teki, Vignesh R, Marek Vasut, Ezequiel García,
Rafał Miłecki, Furquan Shaikh, linux-mtd, linux-kernel
Cc: Ricardo Ribalda Delgado
Xilinx Spartan-3AN FPGAs contain an In-System Flash where they keep
their configuration data and (optionally) some user data.
The protocol of this flash follows most of the spi-nor standard. With
the following differences:
- Page size might not be a power of two.
- The address calculation (default addressing mode).
- The spi nor commands used.
Protocol is described on Xilinx User Guide UG333
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
v5:
-Rebase on top of l2-mtd/master
Suggested by: Cyrille Pitchen <cyrille.pitchen@atmel.com>:
-Fix to+1 bug
-Move all address conversions to spi-nor
-Replace pr_dev with dev_err
v4:
-Rebase on top of l2-mtd/master
v3:
-Rebase on top of mtd-next
-Rename ADDR_NATIVE to ADDR_DEFAULT to follow UG333 naming
-Fix bug on probe
v2: Suggested by Brian Norris <computersforpeace@gmail.com>
-Remove inline qualifier
-Improve documentation of Default Addressing Mode
-Convert function callbacks into SNOR_F_
-Fix missmatch braces
-Improve documentation of SPI_S3AN flag
drivers/mtd/spi-nor/spi-nor.c | 122 ++++++++++++++++++++++++++++++++++++++++--
include/linux/mtd/spi-nor.h | 12 +++++
2 files changed, 129 insertions(+), 5 deletions(-)
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index d0fc165d7d66..94c5fd870058 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -75,6 +75,12 @@ struct flash_info {
* bit. Must be used with
* SPI_NOR_HAS_LOCK.
*/
+#define SPI_S3AN BIT(10) /*
+ * Xilinx Spartan 3AN In-System Flash
+ * (MFR cannot be used for probing
+ * because it has the same value as
+ * ATMEL flashes)
+ */
};
#define JEDEC_MFR(info) ((info)->id[0])
@@ -217,6 +223,21 @@ static inline int set_4byte(struct spi_nor *nor, const struct flash_info *info,
return nor->write_reg(nor, SPINOR_OP_BRWR, nor->cmd_buf, 1);
}
}
+
+static int s3an_sr_ready(struct spi_nor *nor)
+{
+ int ret;
+ u8 val;
+
+ ret = nor->read_reg(nor, SPINOR_OP_XRDSR, &val, 1);
+ if (ret < 0) {
+ dev_err(nor->dev, "error %d reading XRDSR\n", (int) ret);
+ return ret;
+ }
+
+ return !!(val & XSR_RDY);
+}
+
static inline int spi_nor_sr_ready(struct spi_nor *nor)
{
int sr = read_sr(nor);
@@ -238,7 +259,9 @@ static inline int spi_nor_fsr_ready(struct spi_nor *nor)
static int spi_nor_ready(struct spi_nor *nor)
{
int sr, fsr;
- sr = spi_nor_sr_ready(nor);
+
+ sr = nor->flags & SNOR_F_READY_XSR_RDY ? s3an_sr_ready(nor) :
+ spi_nor_sr_ready(nor);
if (sr < 0)
return sr;
fsr = nor->flags & SNOR_F_USE_FSR ? spi_nor_fsr_ready(nor) : 1;
@@ -320,6 +343,22 @@ static void spi_nor_unlock_and_unprep(struct spi_nor *nor, enum spi_nor_ops ops)
}
/*
+ * This code converts an address to the Default Address Mode, that has non
+ * power of two page sizes. We must support this mode because it is the default
+ * mode supported by Xilinx tools, it can access the whole flash area and
+ * changing over to the Power-of-two mode is irreversible and corrupts the
+ * original data.
+ */
+static loff_t spi_nor_s3an_addr_convert(struct spi_nor *nor, unsigned int addr)
+{
+ unsigned int offset;
+
+ offset = (nor->page_size == 264) ? (addr % 264) : (addr % 528);
+
+ return ((addr - offset) << 1) | offset;
+}
+
+/*
* Initiate the erasure of a single sector
*/
static int spi_nor_erase_sector(struct spi_nor *nor, u32 addr)
@@ -327,6 +366,9 @@ static int spi_nor_erase_sector(struct spi_nor *nor, u32 addr)
u8 buf[SPI_NOR_MAX_ADDR_WIDTH];
int i;
+ if (nor->flags & SNOR_F_S3AN_ADDR_DEFAULT)
+ addr = spi_nor_s3an_addr_convert(nor, addr);
+
if (nor->erase)
return nor->erase(nor, addr);
@@ -368,7 +410,7 @@ static int spi_nor_erase(struct mtd_info *mtd, struct erase_info *instr)
return ret;
/* whole-chip erase? */
- if (len == mtd->size) {
+ if (len == mtd->size && !(nor->flags & SNOR_F_NO_OP_CHIP_ERASE)) {
unsigned long timeout;
write_enable(nor);
@@ -782,6 +824,19 @@ static int spi_nor_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
.addr_width = (_addr_width), \
.flags = (_flags),
+#define S3AN_INFO(_jedec_id, _n_sectors, _page_size) \
+ .id = { \
+ ((_jedec_id) >> 16) & 0xff, \
+ ((_jedec_id) >> 8) & 0xff, \
+ (_jedec_id) & 0xff \
+ }, \
+ .id_len = 3, \
+ .sector_size = (8*_page_size), \
+ .n_sectors = (_n_sectors), \
+ .page_size = _page_size, \
+ .addr_width = 3, \
+ .flags = SPI_NOR_NO_FR | SPI_S3AN,
+
/* NOTE: double check command sets and memory organization when you add
* more nor chips. This current list focusses on newer chips, which
* have been converging on command sets which including JEDEC ID.
@@ -1009,6 +1064,13 @@ static const struct flash_info spi_nor_ids[] = {
{ "cat25c09", CAT25_INFO( 128, 8, 32, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) },
{ "cat25c17", CAT25_INFO( 256, 8, 32, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) },
{ "cat25128", CAT25_INFO(2048, 8, 64, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) },
+
+ /* Xilinx S3AN Internal Flash */
+ { "3S50AN", S3AN_INFO(0x1f2200, 64, 264) },
+ { "3S200AN", S3AN_INFO(0x1f2400, 256, 264) },
+ { "3S400AN", S3AN_INFO(0x1f2400, 256, 264) },
+ { "3S700AN", S3AN_INFO(0x1f2500, 512, 264) },
+ { "3S1400AN", S3AN_INFO(0x1f2600, 512, 528) },
{ },
};
@@ -1049,7 +1111,12 @@ static int spi_nor_read(struct mtd_info *mtd, loff_t from, size_t len,
return ret;
while (len) {
- ret = nor->read(nor, from, len, buf);
+ loff_t addr = from;
+
+ if (nor->flags & SNOR_F_S3AN_ADDR_DEFAULT)
+ addr = spi_nor_s3an_addr_convert(nor, addr);
+
+ ret = nor->read(nor, addr, len, buf);
if (ret == 0) {
/* We shouldn't see 0-length reads */
ret = -EIO;
@@ -1170,8 +1237,15 @@ static int spi_nor_write(struct mtd_info *mtd, loff_t to, size_t len,
for (i = 0; i < len; ) {
ssize_t written;
+ loff_t addr = to + i;
- page_offset = (to + i) & (nor->page_size - 1);
+ if (hweight32(nor->page_size) == 1) {
+ page_offset = addr & (nor->page_size - 1);
+ } else {
+ uint64_t aux = addr;
+
+ page_offset = do_div(aux, nor->page_size);
+ }
WARN_ONCE(page_offset,
"Writing at offset %zu into a NOR page. Writing partial pages may decrease reliability and increase wear of NOR flash.",
page_offset);
@@ -1179,8 +1253,11 @@ static int spi_nor_write(struct mtd_info *mtd, loff_t to, size_t len,
page_remain = min_t(size_t,
nor->page_size - page_offset, len - i);
+ if (nor->flags & SNOR_F_S3AN_ADDR_DEFAULT)
+ addr = spi_nor_s3an_addr_convert(nor, addr);
+
write_enable(nor);
- ret = nor->write(nor, to + i, page_remain, buf + i);
+ ret = nor->write(nor, addr, page_remain, buf + i);
if (ret < 0)
goto write_err;
written = ret;
@@ -1300,6 +1377,35 @@ static int spi_nor_check(struct spi_nor *nor)
return 0;
}
+static int s3an_nor_scan(const struct flash_info *info, struct spi_nor *nor)
+{
+ int ret;
+ u8 val;
+
+ ret = nor->read_reg(nor, SPINOR_OP_XRDSR, &val, 1);
+ if (ret < 0) {
+ dev_err(nor->dev, "error %d reading XRDSR\n", (int) ret);
+ return ret;
+ }
+
+ nor->erase_opcode = SPINOR_OP_XSE;
+ nor->program_opcode = SPINOR_OP_XPP;
+ nor->read_opcode = SPINOR_OP_READ;
+ nor->flags |= SNOR_F_NO_OP_CHIP_ERASE | SNOR_F_READY_XSR_RDY;
+
+ /* Flash in Power of 2 mode */
+ if (val & XSR_PAGESIZE) {
+ nor->page_size = (nor->page_size == 264) ? 256 : 512;
+ nor->mtd.writebufsize = nor->page_size;
+ nor->mtd.size = 8 * nor->page_size * info->n_sectors;
+ nor->mtd.erasesize = 8 * nor->page_size;
+ } else {
+ nor->flags |= SNOR_F_S3AN_ADDR_DEFAULT;
+ }
+
+ return 0;
+}
+
int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
{
const struct flash_info *info = NULL;
@@ -1505,6 +1611,12 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
nor->read_dummy = spi_nor_read_dummy_cycles(nor);
+ if (info->flags & SPI_S3AN) {
+ ret = s3an_nor_scan(info, nor);
+ if (ret)
+ return ret;
+ }
+
dev_info(dev, "%s (%lld Kbytes)\n", info->name,
(long long)mtd->size >> 10);
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index c425c7b4c2a0..4950b2ef08c0 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -68,6 +68,15 @@
#define SPINOR_OP_WRDI 0x04 /* Write disable */
#define SPINOR_OP_AAI_WP 0xad /* Auto address increment word program */
+/* Used for S3AN flashes only */
+#define SPINOR_OP_XSE 0x50 /* Sector erase */
+#define SPINOR_OP_XPP 0x82 /* Page program */
+#define SPINOR_OP_XRDSR 0xd7 /* Read status register */
+
+#define XSR_PAGESIZE BIT(0) /* Page size in Po2 or Linear */
+#define XSR_RDY BIT(7) /* Ready */
+
+
/* Used for Macronix and Winbond flashes. */
#define SPINOR_OP_EN4B 0xb7 /* Enter 4-byte mode */
#define SPINOR_OP_EX4B 0xe9 /* Exit 4-byte mode */
@@ -119,6 +128,9 @@ enum spi_nor_ops {
enum spi_nor_option_flags {
SNOR_F_USE_FSR = BIT(0),
SNOR_F_HAS_SR_TB = BIT(1),
+ SNOR_F_NO_OP_CHIP_ERASE = BIT(2),
+ SNOR_F_S3AN_ADDR_DEFAULT = BIT(3),
+ SNOR_F_READY_XSR_RDY = BIT(4),
};
/**
--
2.8.1
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH v5] mtd: spi-nor: Add support for S3AN spi-nor devices
2016-09-16 19:33 [PATCH v5] mtd: spi-nor: Add support for S3AN spi-nor devices Ricardo Ribalda Delgado
@ 2016-09-20 9:52 ` Cyrille Pitchen
2016-09-20 11:21 ` Boris Brezillon
2016-09-20 16:25 ` Boris Brezillon
2 siblings, 0 replies; 7+ messages in thread
From: Cyrille Pitchen @ 2016-09-20 9:52 UTC (permalink / raw)
To: Ricardo Ribalda Delgado, David Woodhouse, Brian Norris,
Javier Martinez Canillas, Boris Brezillon, Stephen Warren,
Jagan Teki, Vignesh R, Marek Vasut, Ezequiel García,
Rafał Miłecki, Furquan Shaikh, linux-mtd, linux-kernel
Hi Ricardo,
Le 16/09/2016 à 21:33, Ricardo Ribalda Delgado a écrit :
> Xilinx Spartan-3AN FPGAs contain an In-System Flash where they keep
> their configuration data and (optionally) some user data.
>
> The protocol of this flash follows most of the spi-nor standard. With
> the following differences:
>
> - Page size might not be a power of two.
> - The address calculation (default addressing mode).
> - The spi nor commands used.
>
> Protocol is described on Xilinx User Guide UG333
>
> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Reviewed-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
> ---
> v5:
> -Rebase on top of l2-mtd/master
> Suggested by: Cyrille Pitchen <cyrille.pitchen@atmel.com>:
> -Fix to+1 bug
> -Move all address conversions to spi-nor
> -Replace pr_dev with dev_err
>
> v4:
> -Rebase on top of l2-mtd/master
>
> v3:
> -Rebase on top of mtd-next
> -Rename ADDR_NATIVE to ADDR_DEFAULT to follow UG333 naming
> -Fix bug on probe
>
> v2: Suggested by Brian Norris <computersforpeace@gmail.com>
>
> -Remove inline qualifier
> -Improve documentation of Default Addressing Mode
> -Convert function callbacks into SNOR_F_
> -Fix missmatch braces
> -Improve documentation of SPI_S3AN flag
> drivers/mtd/spi-nor/spi-nor.c | 122 ++++++++++++++++++++++++++++++++++++++++--
> include/linux/mtd/spi-nor.h | 12 +++++
> 2 files changed, 129 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
> index d0fc165d7d66..94c5fd870058 100644
> --- a/drivers/mtd/spi-nor/spi-nor.c
> +++ b/drivers/mtd/spi-nor/spi-nor.c
> @@ -75,6 +75,12 @@ struct flash_info {
> * bit. Must be used with
> * SPI_NOR_HAS_LOCK.
> */
> +#define SPI_S3AN BIT(10) /*
> + * Xilinx Spartan 3AN In-System Flash
> + * (MFR cannot be used for probing
> + * because it has the same value as
> + * ATMEL flashes)
> + */
> };
>
> #define JEDEC_MFR(info) ((info)->id[0])
> @@ -217,6 +223,21 @@ static inline int set_4byte(struct spi_nor *nor, const struct flash_info *info,
> return nor->write_reg(nor, SPINOR_OP_BRWR, nor->cmd_buf, 1);
> }
> }
> +
> +static int s3an_sr_ready(struct spi_nor *nor)
> +{
> + int ret;
> + u8 val;
> +
> + ret = nor->read_reg(nor, SPINOR_OP_XRDSR, &val, 1);
> + if (ret < 0) {
> + dev_err(nor->dev, "error %d reading XRDSR\n", (int) ret);
> + return ret;
> + }
> +
> + return !!(val & XSR_RDY);
> +}
> +
> static inline int spi_nor_sr_ready(struct spi_nor *nor)
> {
> int sr = read_sr(nor);
> @@ -238,7 +259,9 @@ static inline int spi_nor_fsr_ready(struct spi_nor *nor)
> static int spi_nor_ready(struct spi_nor *nor)
> {
> int sr, fsr;
> - sr = spi_nor_sr_ready(nor);
> +
> + sr = nor->flags & SNOR_F_READY_XSR_RDY ? s3an_sr_ready(nor) :
> + spi_nor_sr_ready(nor);
> if (sr < 0)
> return sr;
> fsr = nor->flags & SNOR_F_USE_FSR ? spi_nor_fsr_ready(nor) : 1;
> @@ -320,6 +343,22 @@ static void spi_nor_unlock_and_unprep(struct spi_nor *nor, enum spi_nor_ops ops)
> }
>
> /*
> + * This code converts an address to the Default Address Mode, that has non
> + * power of two page sizes. We must support this mode because it is the default
> + * mode supported by Xilinx tools, it can access the whole flash area and
> + * changing over to the Power-of-two mode is irreversible and corrupts the
> + * original data.
> + */
> +static loff_t spi_nor_s3an_addr_convert(struct spi_nor *nor, unsigned int addr)
> +{
> + unsigned int offset;
> +
> + offset = (nor->page_size == 264) ? (addr % 264) : (addr % 528);
> +
> + return ((addr - offset) << 1) | offset;
> +}
> +
> +/*
> * Initiate the erasure of a single sector
> */
> static int spi_nor_erase_sector(struct spi_nor *nor, u32 addr)
> @@ -327,6 +366,9 @@ static int spi_nor_erase_sector(struct spi_nor *nor, u32 addr)
> u8 buf[SPI_NOR_MAX_ADDR_WIDTH];
> int i;
>
> + if (nor->flags & SNOR_F_S3AN_ADDR_DEFAULT)
> + addr = spi_nor_s3an_addr_convert(nor, addr);
> +
> if (nor->erase)
> return nor->erase(nor, addr);
>
> @@ -368,7 +410,7 @@ static int spi_nor_erase(struct mtd_info *mtd, struct erase_info *instr)
> return ret;
>
> /* whole-chip erase? */
> - if (len == mtd->size) {
> + if (len == mtd->size && !(nor->flags & SNOR_F_NO_OP_CHIP_ERASE)) {
> unsigned long timeout;
>
> write_enable(nor);
> @@ -782,6 +824,19 @@ static int spi_nor_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
> .addr_width = (_addr_width), \
> .flags = (_flags),
>
> +#define S3AN_INFO(_jedec_id, _n_sectors, _page_size) \
> + .id = { \
> + ((_jedec_id) >> 16) & 0xff, \
> + ((_jedec_id) >> 8) & 0xff, \
> + (_jedec_id) & 0xff \
> + }, \
> + .id_len = 3, \
> + .sector_size = (8*_page_size), \
> + .n_sectors = (_n_sectors), \
> + .page_size = _page_size, \
> + .addr_width = 3, \
> + .flags = SPI_NOR_NO_FR | SPI_S3AN,
> +
> /* NOTE: double check command sets and memory organization when you add
> * more nor chips. This current list focusses on newer chips, which
> * have been converging on command sets which including JEDEC ID.
> @@ -1009,6 +1064,13 @@ static const struct flash_info spi_nor_ids[] = {
> { "cat25c09", CAT25_INFO( 128, 8, 32, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) },
> { "cat25c17", CAT25_INFO( 256, 8, 32, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) },
> { "cat25128", CAT25_INFO(2048, 8, 64, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) },
> +
> + /* Xilinx S3AN Internal Flash */
> + { "3S50AN", S3AN_INFO(0x1f2200, 64, 264) },
> + { "3S200AN", S3AN_INFO(0x1f2400, 256, 264) },
> + { "3S400AN", S3AN_INFO(0x1f2400, 256, 264) },
> + { "3S700AN", S3AN_INFO(0x1f2500, 512, 264) },
> + { "3S1400AN", S3AN_INFO(0x1f2600, 512, 528) },
> { },
> };
>
> @@ -1049,7 +1111,12 @@ static int spi_nor_read(struct mtd_info *mtd, loff_t from, size_t len,
> return ret;
>
> while (len) {
> - ret = nor->read(nor, from, len, buf);
> + loff_t addr = from;
> +
> + if (nor->flags & SNOR_F_S3AN_ADDR_DEFAULT)
> + addr = spi_nor_s3an_addr_convert(nor, addr);
> +
> + ret = nor->read(nor, addr, len, buf);
> if (ret == 0) {
> /* We shouldn't see 0-length reads */
> ret = -EIO;
> @@ -1170,8 +1237,15 @@ static int spi_nor_write(struct mtd_info *mtd, loff_t to, size_t len,
>
> for (i = 0; i < len; ) {
> ssize_t written;
> + loff_t addr = to + i;
>
> - page_offset = (to + i) & (nor->page_size - 1);
> + if (hweight32(nor->page_size) == 1) {
> + page_offset = addr & (nor->page_size - 1);
> + } else {
> + uint64_t aux = addr;
> +
> + page_offset = do_div(aux, nor->page_size);
> + }
> WARN_ONCE(page_offset,
> "Writing at offset %zu into a NOR page. Writing partial pages may decrease reliability and increase wear of NOR flash.",
> page_offset);
> @@ -1179,8 +1253,11 @@ static int spi_nor_write(struct mtd_info *mtd, loff_t to, size_t len,
> page_remain = min_t(size_t,
> nor->page_size - page_offset, len - i);
>
> + if (nor->flags & SNOR_F_S3AN_ADDR_DEFAULT)
> + addr = spi_nor_s3an_addr_convert(nor, addr);
> +
> write_enable(nor);
> - ret = nor->write(nor, to + i, page_remain, buf + i);
> + ret = nor->write(nor, addr, page_remain, buf + i);
> if (ret < 0)
> goto write_err;
> written = ret;
> @@ -1300,6 +1377,35 @@ static int spi_nor_check(struct spi_nor *nor)
> return 0;
> }
>
> +static int s3an_nor_scan(const struct flash_info *info, struct spi_nor *nor)
> +{
> + int ret;
> + u8 val;
> +
> + ret = nor->read_reg(nor, SPINOR_OP_XRDSR, &val, 1);
> + if (ret < 0) {
> + dev_err(nor->dev, "error %d reading XRDSR\n", (int) ret);
> + return ret;
> + }
> +
> + nor->erase_opcode = SPINOR_OP_XSE;
> + nor->program_opcode = SPINOR_OP_XPP;
> + nor->read_opcode = SPINOR_OP_READ;
> + nor->flags |= SNOR_F_NO_OP_CHIP_ERASE | SNOR_F_READY_XSR_RDY;
> +
> + /* Flash in Power of 2 mode */
> + if (val & XSR_PAGESIZE) {
> + nor->page_size = (nor->page_size == 264) ? 256 : 512;
> + nor->mtd.writebufsize = nor->page_size;
> + nor->mtd.size = 8 * nor->page_size * info->n_sectors;
> + nor->mtd.erasesize = 8 * nor->page_size;
> + } else {
> + nor->flags |= SNOR_F_S3AN_ADDR_DEFAULT;
> + }
> +
> + return 0;
> +}
> +
> int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
> {
> const struct flash_info *info = NULL;
> @@ -1505,6 +1611,12 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
>
> nor->read_dummy = spi_nor_read_dummy_cycles(nor);
>
> + if (info->flags & SPI_S3AN) {
> + ret = s3an_nor_scan(info, nor);
> + if (ret)
> + return ret;
> + }
> +
> dev_info(dev, "%s (%lld Kbytes)\n", info->name,
> (long long)mtd->size >> 10);
>
> diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
> index c425c7b4c2a0..4950b2ef08c0 100644
> --- a/include/linux/mtd/spi-nor.h
> +++ b/include/linux/mtd/spi-nor.h
> @@ -68,6 +68,15 @@
> #define SPINOR_OP_WRDI 0x04 /* Write disable */
> #define SPINOR_OP_AAI_WP 0xad /* Auto address increment word program */
>
> +/* Used for S3AN flashes only */
> +#define SPINOR_OP_XSE 0x50 /* Sector erase */
> +#define SPINOR_OP_XPP 0x82 /* Page program */
> +#define SPINOR_OP_XRDSR 0xd7 /* Read status register */
> +
> +#define XSR_PAGESIZE BIT(0) /* Page size in Po2 or Linear */
> +#define XSR_RDY BIT(7) /* Ready */
> +
> +
> /* Used for Macronix and Winbond flashes. */
> #define SPINOR_OP_EN4B 0xb7 /* Enter 4-byte mode */
> #define SPINOR_OP_EX4B 0xe9 /* Exit 4-byte mode */
> @@ -119,6 +128,9 @@ enum spi_nor_ops {
> enum spi_nor_option_flags {
> SNOR_F_USE_FSR = BIT(0),
> SNOR_F_HAS_SR_TB = BIT(1),
> + SNOR_F_NO_OP_CHIP_ERASE = BIT(2),
> + SNOR_F_S3AN_ADDR_DEFAULT = BIT(3),
> + SNOR_F_READY_XSR_RDY = BIT(4),
> };
>
> /**
>
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH v5] mtd: spi-nor: Add support for S3AN spi-nor devices
2016-09-16 19:33 [PATCH v5] mtd: spi-nor: Add support for S3AN spi-nor devices Ricardo Ribalda Delgado
2016-09-20 9:52 ` Cyrille Pitchen
@ 2016-09-20 11:21 ` Boris Brezillon
2016-09-20 15:45 ` Ricardo Ribalda Delgado
2016-09-20 16:25 ` Boris Brezillon
2 siblings, 1 reply; 7+ messages in thread
From: Boris Brezillon @ 2016-09-20 11:21 UTC (permalink / raw)
To: Ricardo Ribalda Delgado
Cc: Cyrille Pitchen, David Woodhouse, Brian Norris,
Javier Martinez Canillas, Stephen Warren, Jagan Teki, Vignesh R,
Marek Vasut, Ezequiel García, Rafał Miłecki,
Furquan Shaikh, linux-mtd, linux-kernel
Hi Ricardo,
On Fri, 16 Sep 2016 21:33:52 +0200
Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> wrote:
> Xilinx Spartan-3AN FPGAs contain an In-System Flash where they keep
> their configuration data and (optionally) some user data.
>
> The protocol of this flash follows most of the spi-nor standard. With
> the following differences:
>
> - Page size might not be a power of two.
> - The address calculation (default addressing mode).
> - The spi nor commands used.
>
> Protocol is described on Xilinx User Guide UG333
>
> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
> ---
> v5:
> -Rebase on top of l2-mtd/master
> Suggested by: Cyrille Pitchen <cyrille.pitchen@atmel.com>:
> -Fix to+1 bug
> -Move all address conversions to spi-nor
> -Replace pr_dev with dev_err
>
> v4:
> -Rebase on top of l2-mtd/master
>
> v3:
> -Rebase on top of mtd-next
> -Rename ADDR_NATIVE to ADDR_DEFAULT to follow UG333 naming
> -Fix bug on probe
>
> v2: Suggested by Brian Norris <computersforpeace@gmail.com>
>
> -Remove inline qualifier
> -Improve documentation of Default Addressing Mode
> -Convert function callbacks into SNOR_F_
> -Fix missmatch braces
> -Improve documentation of SPI_S3AN flag
> drivers/mtd/spi-nor/spi-nor.c | 122 ++++++++++++++++++++++++++++++++++++++++--
> include/linux/mtd/spi-nor.h | 12 +++++
> 2 files changed, 129 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
> index d0fc165d7d66..94c5fd870058 100644
> --- a/drivers/mtd/spi-nor/spi-nor.c
> +++ b/drivers/mtd/spi-nor/spi-nor.c
> @@ -75,6 +75,12 @@ struct flash_info {
> * bit. Must be used with
> * SPI_NOR_HAS_LOCK.
> */
> +#define SPI_S3AN BIT(10) /*
> + * Xilinx Spartan 3AN In-System Flash
> + * (MFR cannot be used for probing
> + * because it has the same value as
> + * ATMEL flashes)
> + */
> };
>
> #define JEDEC_MFR(info) ((info)->id[0])
> @@ -217,6 +223,21 @@ static inline int set_4byte(struct spi_nor *nor, const struct flash_info *info,
> return nor->write_reg(nor, SPINOR_OP_BRWR, nor->cmd_buf, 1);
> }
> }
> +
> +static int s3an_sr_ready(struct spi_nor *nor)
> +{
> + int ret;
> + u8 val;
> +
> + ret = nor->read_reg(nor, SPINOR_OP_XRDSR, &val, 1);
> + if (ret < 0) {
> + dev_err(nor->dev, "error %d reading XRDSR\n", (int) ret);
> + return ret;
> + }
> +
> + return !!(val & XSR_RDY);
> +}
> +
> static inline int spi_nor_sr_ready(struct spi_nor *nor)
> {
> int sr = read_sr(nor);
> @@ -238,7 +259,9 @@ static inline int spi_nor_fsr_ready(struct spi_nor *nor)
> static int spi_nor_ready(struct spi_nor *nor)
> {
> int sr, fsr;
> - sr = spi_nor_sr_ready(nor);
> +
> + sr = nor->flags & SNOR_F_READY_XSR_RDY ? s3an_sr_ready(nor) :
> + spi_nor_sr_ready(nor);
Nit: I find
if (nor->flags & SNOR_F_READY_XSR_RDY)
sr = s3an_sr_ready(nor);
else
sr = spi_nor_sr_ready(nor);
more readable.
> if (sr < 0)
> return sr;
> fsr = nor->flags & SNOR_F_USE_FSR ? spi_nor_fsr_ready(nor) : 1;
> @@ -320,6 +343,22 @@ static void spi_nor_unlock_and_unprep(struct spi_nor *nor, enum spi_nor_ops ops)
> }
>
> /*
> + * This code converts an address to the Default Address Mode, that has non
> + * power of two page sizes. We must support this mode because it is the default
> + * mode supported by Xilinx tools, it can access the whole flash area and
> + * changing over to the Power-of-two mode is irreversible and corrupts the
> + * original data.
> + */
> +static loff_t spi_nor_s3an_addr_convert(struct spi_nor *nor, unsigned int addr)
> +{
> + unsigned int offset;
> +
> + offset = (nor->page_size == 264) ? (addr % 264) : (addr % 528);
Why not just
offset = addr % nor->page_size;
> +
> + return ((addr - offset) << 1) | offset;
> +}
> +
Sorry for this useless review :-).
Regards,
Boris
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH v5] mtd: spi-nor: Add support for S3AN spi-nor devices
2016-09-20 11:21 ` Boris Brezillon
@ 2016-09-20 15:45 ` Ricardo Ribalda Delgado
2016-09-20 16:09 ` Boris Brezillon
0 siblings, 1 reply; 7+ messages in thread
From: Ricardo Ribalda Delgado @ 2016-09-20 15:45 UTC (permalink / raw)
To: Boris Brezillon
Cc: Cyrille Pitchen, David Woodhouse, Brian Norris,
Javier Martinez Canillas, Stephen Warren, Jagan Teki, Vignesh R,
Marek Vasut, Ezequiel García, Rafał Miłecki,
Furquan Shaikh, linux-mtd, LKML
Hi Boris
Thanks for your review.
On Tue, Sep 20, 2016 at 1:21 PM, Boris Brezillon
<boris.brezillon@free-electrons.com> wrote:
>> int sr, fsr;
>> - sr = spi_nor_sr_ready(nor);
>> +
>> + sr = nor->flags & SNOR_F_READY_XSR_RDY ? s3an_sr_ready(nor) :
>> + spi_nor_sr_ready(nor);
>
> Nit: I find
>
> if (nor->flags & SNOR_F_READY_XSR_RDY)
> sr = s3an_sr_ready(nor);
> else
> sr = spi_nor_sr_ready(nor);
Fixed in v6
>> +static loff_t spi_nor_s3an_addr_convert(struct spi_nor *nor, unsigned int addr)
>> +{
>> + unsigned int offset;
>> +
>> + offset = (nor->page_size == 264) ? (addr % 264) : (addr % 528);
>
> Why not just
>
> offset = addr % nor->page_size;
>
Because kbuild test robot does not like it ;)
make.cross ARCH=blackfin
All errors (new ones prefixed by >>):
drivers/built-in.o: In function `spi_nor_write':
>> drivers/mtd/spi-nor/spi-nor.c:1050: undefined reference to `__moddi3'
vim +1050 drivers/mtd/spi-nor/spi-nor.c
Thanks!
--
Ricardo Ribalda
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH v5] mtd: spi-nor: Add support for S3AN spi-nor devices
2016-09-20 15:45 ` Ricardo Ribalda Delgado
@ 2016-09-20 16:09 ` Boris Brezillon
0 siblings, 0 replies; 7+ messages in thread
From: Boris Brezillon @ 2016-09-20 16:09 UTC (permalink / raw)
To: Ricardo Ribalda Delgado
Cc: Cyrille Pitchen, David Woodhouse, Brian Norris,
Javier Martinez Canillas, Stephen Warren, Jagan Teki, Vignesh R,
Marek Vasut, Ezequiel García, Rafał Miłecki,
Furquan Shaikh, linux-mtd, LKML
On Tue, 20 Sep 2016 17:45:55 +0200
Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> wrote:
> Hi Boris
>
> Thanks for your review.
>
> On Tue, Sep 20, 2016 at 1:21 PM, Boris Brezillon
> <boris.brezillon@free-electrons.com> wrote:
> >> int sr, fsr;
> >> - sr = spi_nor_sr_ready(nor);
> >> +
> >> + sr = nor->flags & SNOR_F_READY_XSR_RDY ? s3an_sr_ready(nor) :
> >> + spi_nor_sr_ready(nor);
> >
> > Nit: I find
> >
> > if (nor->flags & SNOR_F_READY_XSR_RDY)
> > sr = s3an_sr_ready(nor);
> > else
> > sr = spi_nor_sr_ready(nor);
>
> Fixed in v6
>
>
> >> +static loff_t spi_nor_s3an_addr_convert(struct spi_nor *nor, unsigned int addr)
> >> +{
> >> + unsigned int offset;
> >> +
> >> + offset = (nor->page_size == 264) ? (addr % 264) : (addr % 528);
> >
> > Why not just
> >
> > offset = addr % nor->page_size;
> >
>
> Because kbuild test robot does not like it ;)
>
> make.cross ARCH=blackfin
>
> All errors (new ones prefixed by >>):
>
> drivers/built-in.o: In function `spi_nor_write':
> >> drivers/mtd/spi-nor/spi-nor.c:1050: undefined reference to `__moddi3'
>
> vim +1050 drivers/mtd/spi-nor/spi-nor.c
Hm, that's weird, I would expect that if you were manipulating a 64 bit
type, but that's not the case here.
Are you sure you didn't change the type of the addr parameter at some
point?
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH v5] mtd: spi-nor: Add support for S3AN spi-nor devices
2016-09-16 19:33 [PATCH v5] mtd: spi-nor: Add support for S3AN spi-nor devices Ricardo Ribalda Delgado
2016-09-20 9:52 ` Cyrille Pitchen
2016-09-20 11:21 ` Boris Brezillon
@ 2016-09-20 16:25 ` Boris Brezillon
2016-09-20 18:01 ` Ricardo Ribalda Delgado
2 siblings, 1 reply; 7+ messages in thread
From: Boris Brezillon @ 2016-09-20 16:25 UTC (permalink / raw)
To: Ricardo Ribalda Delgado
Cc: Cyrille Pitchen, David Woodhouse, Brian Norris,
Javier Martinez Canillas, Stephen Warren, Jagan Teki, Vignesh R,
Marek Vasut, Ezequiel García, Rafał Miłecki,
Furquan Shaikh, linux-mtd, linux-kernel
On Fri, 16 Sep 2016 21:33:52 +0200
Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> wrote:
> Xilinx Spartan-3AN FPGAs contain an In-System Flash where they keep
> their configuration data and (optionally) some user data.
>
> The protocol of this flash follows most of the spi-nor standard. With
> the following differences:
>
> - Page size might not be a power of two.
> - The address calculation (default addressing mode).
> - The spi nor commands used.
>
> Protocol is described on Xilinx User Guide UG333
>
> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
> ---
> v5:
> -Rebase on top of l2-mtd/master
> Suggested by: Cyrille Pitchen <cyrille.pitchen@atmel.com>:
> -Fix to+1 bug
> -Move all address conversions to spi-nor
> -Replace pr_dev with dev_err
>
> v4:
> -Rebase on top of l2-mtd/master
>
> v3:
> -Rebase on top of mtd-next
> -Rename ADDR_NATIVE to ADDR_DEFAULT to follow UG333 naming
> -Fix bug on probe
>
> v2: Suggested by Brian Norris <computersforpeace@gmail.com>
>
> -Remove inline qualifier
> -Improve documentation of Default Addressing Mode
> -Convert function callbacks into SNOR_F_
> -Fix missmatch braces
> -Improve documentation of SPI_S3AN flag
> drivers/mtd/spi-nor/spi-nor.c | 122 ++++++++++++++++++++++++++++++++++++++++--
> include/linux/mtd/spi-nor.h | 12 +++++
> 2 files changed, 129 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
> index d0fc165d7d66..94c5fd870058 100644
> --- a/drivers/mtd/spi-nor/spi-nor.c
> +++ b/drivers/mtd/spi-nor/spi-nor.c
[...]
> /*
> + * This code converts an address to the Default Address Mode, that has non
> + * power of two page sizes. We must support this mode because it is the default
> + * mode supported by Xilinx tools, it can access the whole flash area and
> + * changing over to the Power-of-two mode is irreversible and corrupts the
> + * original data.
> + */
> +static loff_t spi_nor_s3an_addr_convert(struct spi_nor *nor, unsigned int addr)
> +{
> + unsigned int offset;
> +
> + offset = (nor->page_size == 264) ? (addr % 264) : (addr % 528);
> +
> + return ((addr - offset) << 1) | offset;
> +}
[...]
>
> @@ -1049,7 +1111,12 @@ static int spi_nor_read(struct mtd_info *mtd, loff_t from, size_t len,
> return ret;
>
> while (len) {
> - ret = nor->read(nor, from, len, buf);
> + loff_t addr = from;
> +
> + if (nor->flags & SNOR_F_S3AN_ADDR_DEFAULT)
> + addr = spi_nor_s3an_addr_convert(nor, addr);
Don't know if that's important since NOR flashes are unlikely to be
larger than 4GB, but you're casting a loff_t (unsigned long long) type
to an unsigned int (spi_nor_s3an_addr_convert() is taking an unsigned
int).
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH v5] mtd: spi-nor: Add support for S3AN spi-nor devices
2016-09-20 16:25 ` Boris Brezillon
@ 2016-09-20 18:01 ` Ricardo Ribalda Delgado
0 siblings, 0 replies; 7+ messages in thread
From: Ricardo Ribalda Delgado @ 2016-09-20 18:01 UTC (permalink / raw)
To: Boris Brezillon
Cc: Cyrille Pitchen, David Woodhouse, Brian Norris,
Javier Martinez Canillas, Stephen Warren, Jagan Teki, Vignesh R,
Marek Vasut, Ezequiel García, Rafał Miłecki,
Furquan Shaikh, linux-mtd, LKML
Hi Boris
On Tue, Sep 20, 2016 at 6:25 PM, Boris Brezillon
<boris.brezillon@free-electrons.com> wrote:
>> while (len) {
>> - ret = nor->read(nor, from, len, buf);
>> + loff_t addr = from;
>> +
>> + if (nor->flags & SNOR_F_S3AN_ADDR_DEFAULT)
>> + addr = spi_nor_s3an_addr_convert(nor, addr);
That should not be an issue, the bigest s3an is less than 4 MBytes :)
Thanks for your review
--
Ricardo Ribalda
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2016-09-20 18:01 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-09-16 19:33 [PATCH v5] mtd: spi-nor: Add support for S3AN spi-nor devices Ricardo Ribalda Delgado
2016-09-20 9:52 ` Cyrille Pitchen
2016-09-20 11:21 ` Boris Brezillon
2016-09-20 15:45 ` Ricardo Ribalda Delgado
2016-09-20 16:09 ` Boris Brezillon
2016-09-20 16:25 ` Boris Brezillon
2016-09-20 18:01 ` Ricardo Ribalda Delgado
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