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This pull request contains the following notable changes:

Browse Source 
- add support to the 4-byte address instruction set.
 - add support to new memory parts.
 - add support to S3AN memories.
 - add support to the Intel SPI controller.
 - add support to the Aspeed AST2400 and AST2550 controllers.
 - fix max SPI transfer and message sizes in m25p80_read().
 - fix the Candence QSPI driver.
 - fix the Freescale QSPI driver.
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Merge tag 'spi-nor/for-4.11-v2' of git://github.com/spi-nor/linux

From Cyrille:

"""
This pull request contains the following notable changes:
- add support to the 4-byte address instruction set.
- add support to new memory parts.
- add support to S3AN memories.
- add support to the Intel SPI controller.
- add support to the Aspeed AST2400 and AST2550 controllers.
- fix max SPI transfer and message sizes in m25p80_read().
- fix the Candence QSPI driver.
- fix the Freescale QSPI driver.
"""
This commit is contained in:
Brian Norris 2017-02-10 10:05:51 -08:00
commit 398d8739bb
21 changed files with 2278 additions and 100 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
Documentation/devicetree/bindings/mtd/aspeed-smc.txt Normal file
View File

@ -0,0 +1,51 @@
* Aspeed Firmware Memory controller
* Aspeed SPI Flash Memory Controller
The Firmware Memory Controller in the Aspeed AST2500 SoC supports
three chip selects, two of which are always of SPI type and the third
can be SPI or NOR type flash. These bindings only describe SPI.
The two SPI flash memory controllers in the AST2500 each support two
chip selects.
Required properties:
- compatible : Should be one of
"aspeed,ast2400-fmc" for the AST2400 Firmware Memory Controller
"aspeed,ast2400-spi" for the AST2400 SPI Flash memory Controller
"aspeed,ast2500-fmc" for the AST2500 Firmware Memory Controller
"aspeed,ast2500-spi" for the AST2500 SPI flash memory controllers
- reg : the first contains the control register location and length,
the second contains the memory window mapping address and length
- #address-cells : must be 1 corresponding to chip select child binding
- #size-cells : must be 0 corresponding to chip select child binding
Optional properties:
- interrupts : Should contain the interrupt for the dma device if an
FMC
The child nodes are the SPI flash modules which must have a compatible
property as specified in bindings/mtd/jedec,spi-nor.txt
Optionally, the child node can contain properties for SPI mode (may be
ignored):
- spi-max-frequency - max frequency of spi bus
Example:
fmc: fmc@1e620000 {
compatible = "aspeed,ast2500-fmc";
reg = < 0x1e620000 0x94
0x20000000 0x02000000 >;
#address-cells = <1>;
#size-cells = <0>;
interrupts = <19>;
flash@0 {
reg = < 0 >;
compatible = "jedec,spi-nor";
/* spi-max-frequency = <>; */
/* m25p,fast-read; */
#address-cells = <1>;
#size-cells = <1>;
};
};

2
Documentation/devicetree/bindings/mtd/jedec,spi-nor.txt
View File

@ -14,6 +14,8 @@ Required properties:
at25df641
at26df081a
mr25h256
mr25h10
mr25h40
mx25l4005a
mx25l1606e
mx25l6405d

8
Documentation/devicetree/bindings/mtd/mtk-quadspi.txt
View File

@ -1,7 +1,13 @@
* Serial NOR flash controller for MTK MT81xx (and similar)
Required properties:
- compatible: should be "mediatek,mt8173-nor";
- compatible: The possible values are:
"mediatek,mt2701-nor"
"mediatek,mt7623-nor"
"mediatek,mt8173-nor"
For mt8173, compatible should be "mediatek,mt8173-nor".
For every other SoC, should contain both the SoC-specific compatible string
and "mediatek,mt8173-nor".
- reg: physical base address and length of the controller's register
- clocks: the phandle of the clocks needed by the nor controller
- clock-names: the names of the clocks

88
Documentation/mtd/intel-spi.txt Normal file
View File

@ -0,0 +1,88 @@
Upgrading BIOS using intel-spi
------------------------------
Many Intel CPUs like Baytrail and Braswell include SPI serial flash host
controller which is used to hold BIOS and other platform specific data.
Since contents of the SPI serial flash is crucial for machine to function,
it is typically protected by different hardware protection mechanisms to
avoid accidental (or on purpose) overwrite of the content.
Not all manufacturers protect the SPI serial flash, mainly because it
allows upgrading the BIOS image directly from an OS.
The intel-spi driver makes it possible to read and write the SPI serial
flash, if certain protection bits are not set and locked. If it finds
any of them set, the whole MTD device is made read-only to prevent
partial overwrites. By default the driver exposes SPI serial flash
contents as read-only but it can be changed from kernel command line,
passing "intel-spi.writeable=1".
Please keep in mind that overwriting the BIOS image on SPI serial flash
might render the machine unbootable and requires special equipment like
Dediprog to revive. You have been warned!
Below are the steps how to upgrade MinnowBoard MAX BIOS directly from
Linux.
1) Download and extract the latest Minnowboard MAX BIOS SPI image
[1]. At the time writing this the latest image is v92.
2) Install mtd-utils package [2]. We need this in order to erase the SPI
serial flash. Distros like Debian and Fedora have this prepackaged with
name "mtd-utils".
3) Add "intel-spi.writeable=1" to the kernel command line and reboot
the board (you can also reload the driver passing "writeable=1" as
module parameter to modprobe).
4) Once the board is up and running again, find the right MTD partition
(it is named as "BIOS"):
# cat /proc/mtd
dev: size erasesize name
mtd0: 00800000 00001000 "BIOS"
So here it will be /dev/mtd0 but it may vary.
5) Make backup of the existing image first:
# dd if=/dev/mtd0ro of=bios.bak
16384+0 records in
16384+0 records out
8388608 bytes (8.4 MB) copied, 10.0269 s, 837 kB/s
6) Verify the backup
# sha1sum /dev/mtd0ro bios.bak
fdbb011920572ca6c991377c4b418a0502668b73 /dev/mtd0ro
fdbb011920572ca6c991377c4b418a0502668b73 bios.bak
The SHA1 sums must match. Otherwise do not continue any further!
7) Erase the SPI serial flash. After this step, do not reboot the
board! Otherwise it will not start anymore.
# flash_erase /dev/mtd0 0 0
Erasing 4 Kibyte @ 7ff000 -- 100 % complete
8) Once completed without errors you can write the new BIOS image:
# dd if=MNW2MAX1.X64.0092.R01.1605221712.bin of=/dev/mtd0
9) Verify that the new content of the SPI serial flash matches the new
BIOS image:
# sha1sum /dev/mtd0ro MNW2MAX1.X64.0092.R01.1605221712.bin
9b4df9e4be2057fceec3a5529ec3d950836c87a2 /dev/mtd0ro
9b4df9e4be2057fceec3a5529ec3d950836c87a2 MNW2MAX1.X64.0092.R01.1605221712.bin
The SHA1 sums should match.
10) Now you can reboot your board and observe the new BIOS starting up
properly.
References
----------
[1] https://firmware.intel.com/sites/default/files/MinnowBoard.MAX_.X64.92.R01.zip
[2] http://www.linux-mtd.infradead.org/

131
drivers/mfd/lpc_ich.c
View File

@ -56,6 +56,7 @@
* document number TBD : Wildcat Point-LP
* document number TBD : 9 Series
* document number TBD : Lewisburg
* document number TBD : Apollo Lake SoC
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@ -83,6 +84,17 @@
#define ACPIBASE_GCS_OFF 0x3410
#define ACPIBASE_GCS_END 0x3414
#define SPIBASE_BYT 0x54
#define SPIBASE_BYT_SZ 512
#define SPIBASE_BYT_EN BIT(1)
#define SPIBASE_LPT 0x3800
#define SPIBASE_LPT_SZ 512
#define BCR 0xdc
#define BCR_WPD BIT(0)
#define SPIBASE_APL_SZ 4096
#define GPIOBASE_ICH0 0x58
#define GPIOCTRL_ICH0 0x5C
#define GPIOBASE_ICH6 0x48
@ -133,6 +145,12 @@ static struct resource gpio_ich_res[] = {
},
};
static struct resource intel_spi_res[] = {
{
.flags = IORESOURCE_MEM,
}
};
static struct mfd_cell lpc_ich_wdt_cell = {
.name = "iTCO_wdt",
.num_resources = ARRAY_SIZE(wdt_ich_res),
@ -147,6 +165,14 @@ static struct mfd_cell lpc_ich_gpio_cell = {
.ignore_resource_conflicts = true,
};
static struct mfd_cell lpc_ich_spi_cell = {
.name = "intel-spi",
.num_resources = ARRAY_SIZE(intel_spi_res),
.resources = intel_spi_res,
.ignore_resource_conflicts = true,
};
/* chipset related info */
enum lpc_chipsets {
LPC_ICH = 0, /* ICH */
@ -216,6 +242,7 @@ enum lpc_chipsets {
LPC_BRASWELL, /* Braswell SoC */
LPC_LEWISBURG, /* Lewisburg */
LPC_9S, /* 9 Series */
LPC_APL, /* Apollo Lake SoC */
};
static struct lpc_ich_info lpc_chipset_info[] = {
@ -494,10 +521,12 @@ static struct lpc_ich_info lpc_chipset_info[] = {
.name = "Lynx Point",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
.spi_type = INTEL_SPI_LPT,
},
[LPC_LPT_LP] = {
.name = "Lynx Point_LP",
.iTCO_version = 2,
.spi_type = INTEL_SPI_LPT,
},
[LPC_WBG] = {
.name = "Wellsburg",
@ -511,6 +540,7 @@ static struct lpc_ich_info lpc_chipset_info[] = {
[LPC_BAYTRAIL] = {
.name = "Bay Trail SoC",
.iTCO_version = 3,
.spi_type = INTEL_SPI_BYT,
},
[LPC_COLETO] = {
.name = "Coleto Creek",
@ -519,10 +549,12 @@ static struct lpc_ich_info lpc_chipset_info[] = {
[LPC_WPT_LP] = {
.name = "Wildcat Point_LP",
.iTCO_version = 2,
.spi_type = INTEL_SPI_LPT,
},
[LPC_BRASWELL] = {
.name = "Braswell SoC",
.iTCO_version = 3,
.spi_type = INTEL_SPI_BYT,
},
[LPC_LEWISBURG] = {
.name = "Lewisburg",
@ -533,6 +565,10 @@ static struct lpc_ich_info lpc_chipset_info[] = {
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_APL] = {
.name = "Apollo Lake SoC",
.spi_type = INTEL_SPI_BXT,
},
};
/*
@ -681,6 +717,7 @@ static const struct pci_device_id lpc_ich_ids[] = {
{ PCI_VDEVICE(INTEL, 0x3b14), LPC_3420},
{ PCI_VDEVICE(INTEL, 0x3b16), LPC_3450},
{ PCI_VDEVICE(INTEL, 0x5031), LPC_EP80579},
{ PCI_VDEVICE(INTEL, 0x5ae8), LPC_APL},
{ PCI_VDEVICE(INTEL, 0x8c40), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c41), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c42), LPC_LPT},
@ -1056,6 +1093,94 @@ wdt_done:
return ret;
}
static int lpc_ich_init_spi(struct pci_dev *dev)
{
struct lpc_ich_priv *priv = pci_get_drvdata(dev);
struct resource *res = &intel_spi_res[0];
struct intel_spi_boardinfo *info;
u32 spi_base, rcba, bcr;
info = devm_kzalloc(&dev->dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->type = lpc_chipset_info[priv->chipset].spi_type;
switch (info->type) {
case INTEL_SPI_BYT:
pci_read_config_dword(dev, SPIBASE_BYT, &spi_base);
if (spi_base & SPIBASE_BYT_EN) {
res->start = spi_base & ~(SPIBASE_BYT_SZ - 1);
res->end = res->start + SPIBASE_BYT_SZ - 1;
}
break;
case INTEL_SPI_LPT:
pci_read_config_dword(dev, RCBABASE, &rcba);
if (rcba & 1) {
spi_base = round_down(rcba, SPIBASE_LPT_SZ);
res->start = spi_base + SPIBASE_LPT;
res->end = res->start + SPIBASE_LPT_SZ - 1;
/*
* Try to make the flash chip writeable now by
* setting BCR_WPD. It it fails we tell the driver
* that it can only read the chip.
*/
pci_read_config_dword(dev, BCR, &bcr);
if (!(bcr & BCR_WPD)) {
bcr |= BCR_WPD;
pci_write_config_dword(dev, BCR, bcr);
pci_read_config_dword(dev, BCR, &bcr);
}
info->writeable = !!(bcr & BCR_WPD);
}
break;
case INTEL_SPI_BXT: {
unsigned int p2sb = PCI_DEVFN(13, 0);
unsigned int spi = PCI_DEVFN(13, 2);
struct pci_bus *bus = dev->bus;
/*
* The P2SB is hidden by BIOS and we need to unhide it in
* order to read BAR of the SPI flash device. Once that is
* done we hide it again.
*/
pci_bus_write_config_byte(bus, p2sb, 0xe1, 0x0);
pci_bus_read_config_dword(bus, spi, PCI_BASE_ADDRESS_0,
&spi_base);
if (spi_base != ~0) {
res->start = spi_base & 0xfffffff0;
res->end = res->start + SPIBASE_APL_SZ - 1;
pci_bus_read_config_dword(bus, spi, BCR, &bcr);
if (!(bcr & BCR_WPD)) {
bcr |= BCR_WPD;
pci_bus_write_config_dword(bus, spi, BCR, bcr);
pci_bus_read_config_dword(bus, spi, BCR, &bcr);
}
info->writeable = !!(bcr & BCR_WPD);
}
pci_bus_write_config_byte(bus, p2sb, 0xe1, 0x1);
break;
}
default:
return -EINVAL;
}
if (!res->start)
return -ENODEV;
lpc_ich_spi_cell.platform_data = info;
lpc_ich_spi_cell.pdata_size = sizeof(*info);
return mfd_add_devices(&dev->dev, PLATFORM_DEVID_NONE,
&lpc_ich_spi_cell, 1, NULL, 0, NULL);
}
static int lpc_ich_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
@ -1099,6 +1224,12 @@ static int lpc_ich_probe(struct pci_dev *dev,
cell_added = true;
}
if (lpc_chipset_info[priv->chipset].spi_type) {
ret = lpc_ich_init_spi(dev);
if (!ret)
cell_added = true;
}
/*
* We only care if at least one or none of the cells registered
* successfully.

9
drivers/mtd/devices/m25p80.c
View File

@ -172,7 +172,8 @@ static ssize_t m25p80_read(struct spi_nor *nor, loff_t from, size_t len,
t[1].rx_buf = buf;
t[1].rx_nbits = m25p80_rx_nbits(nor);
t[1].len = min(len, spi_max_transfer_size(spi));
t[1].len = min3(len, spi_max_transfer_size(spi),
spi_max_message_size(spi) - t[0].len);
spi_message_add_tail(&t[1], &m);
ret = spi_sync(spi, &m);
@ -288,7 +289,6 @@ static const struct spi_device_id m25p_ids[] = {
* should be kept for backward compatibility.
*/
{"at25df321a"}, {"at25df641"}, {"at26df081a"},
{"mr25h256"},
{"mx25l4005a"}, {"mx25l1606e"}, {"mx25l6405d"}, {"mx25l12805d"},
{"mx25l25635e"},{"mx66l51235l"},
{"n25q064"}, {"n25q128a11"}, {"n25q128a13"}, {"n25q512a"},
@ -305,6 +305,11 @@ static const struct spi_device_id m25p_ids[] = {
{"m25p40-nonjedec"}, {"m25p80-nonjedec"}, {"m25p16-nonjedec"},
{"m25p32-nonjedec"}, {"m25p64-nonjedec"}, {"m25p128-nonjedec"},
/* Everspin MRAMs (non-JEDEC) */
{ "mr25h256" }, /* 256 Kib, 40 MHz */
{ "mr25h10" }, /* 1 Mib, 40 MHz */
{ "mr25h40" }, /* 4 Mib, 40 MHz */
{ },
};
MODULE_DEVICE_TABLE(spi, m25p_ids);

7
drivers/mtd/devices/serial_flash_cmds.h
View File

@ -18,19 +18,12 @@
#define SPINOR_OP_RDVCR 0x85
/* JEDEC Standard - Serial Flash Discoverable Parmeters (SFDP) Commands */
#define SPINOR_OP_READ_1_2_2 0xbb /* DUAL I/O READ */
#define SPINOR_OP_READ_1_4_4 0xeb /* QUAD I/O READ */
#define SPINOR_OP_WRITE 0x02 /* PAGE PROGRAM */
#define SPINOR_OP_WRITE_1_1_2 0xa2 /* DUAL INPUT PROGRAM */
#define SPINOR_OP_WRITE_1_2_2 0xd2 /* DUAL INPUT EXT PROGRAM */
#define SPINOR_OP_WRITE_1_1_4 0x32 /* QUAD INPUT PROGRAM */
#define SPINOR_OP_WRITE_1_4_4 0x12 /* QUAD INPUT EXT PROGRAM */
/* READ commands with 32-bit addressing */
#define SPINOR_OP_READ4_1_2_2 0xbc
#define SPINOR_OP_READ4_1_4_4 0xec
/* Configuration flags */
#define FLASH_FLAG_SINGLE 0x000000ff
#define FLASH_FLAG_READ_WRITE 0x00000001

28
drivers/mtd/devices/st_spi_fsm.c
View File

@ -507,13 +507,13 @@ static struct seq_rw_config n25q_read3_configs[] = {
* - 'FAST' variants configured for 8 dummy cycles (see note above.)
*/
static struct seq_rw_config n25q_read4_configs[] = {
{FLASH_FLAG_READ_1_4_4, SPINOR_OP_READ4_1_4_4, 0, 4, 4, 0x00, 0, 8},
{FLASH_FLAG_READ_1_1_4, SPINOR_OP_READ4_1_1_4, 0, 1, 4, 0x00, 0, 8},
{FLASH_FLAG_READ_1_2_2, SPINOR_OP_READ4_1_2_2, 0, 2, 2, 0x00, 0, 8},
{FLASH_FLAG_READ_1_1_2, SPINOR_OP_READ4_1_1_2, 0, 1, 2, 0x00, 0, 8},
{FLASH_FLAG_READ_FAST, SPINOR_OP_READ4_FAST, 0, 1, 1, 0x00, 0, 8},
{FLASH_FLAG_READ_WRITE, SPINOR_OP_READ4, 0, 1, 1, 0x00, 0, 0},
{0x00, 0, 0, 0, 0, 0x00, 0, 0},
{FLASH_FLAG_READ_1_4_4, SPINOR_OP_READ_1_4_4_4B, 0, 4, 4, 0x00, 0, 8},
{FLASH_FLAG_READ_1_1_4, SPINOR_OP_READ_1_1_4_4B, 0, 1, 4, 0x00, 0, 8},
{FLASH_FLAG_READ_1_2_2, SPINOR_OP_READ_1_2_2_4B, 0, 2, 2, 0x00, 0, 8},
{FLASH_FLAG_READ_1_1_2, SPINOR_OP_READ_1_1_2_4B, 0, 1, 2, 0x00, 0, 8},
{FLASH_FLAG_READ_FAST, SPINOR_OP_READ_FAST_4B, 0, 1, 1, 0x00, 0, 8},
{FLASH_FLAG_READ_WRITE, SPINOR_OP_READ_4B, 0, 1, 1, 0x00, 0, 0},
{0x00, 0, 0, 0, 0, 0x00, 0, 0},
};
/*
@ -553,13 +553,13 @@ static int stfsm_mx25_en_32bit_addr_seq(struct stfsm_seq *seq)
* entering a state that is incompatible with the SPIBoot Controller.
*/
static struct seq_rw_config stfsm_s25fl_read4_configs[] = {
{FLASH_FLAG_READ_1_4_4, SPINOR_OP_READ4_1_4_4, 0, 4, 4, 0x00, 2, 4},
{FLASH_FLAG_READ_1_1_4, SPINOR_OP_READ4_1_1_4, 0, 1, 4, 0x00, 0, 8},
{FLASH_FLAG_READ_1_2_2, SPINOR_OP_READ4_1_2_2, 0, 2, 2, 0x00, 4, 0},
{FLASH_FLAG_READ_1_1_2, SPINOR_OP_READ4_1_1_2, 0, 1, 2, 0x00, 0, 8},
{FLASH_FLAG_READ_FAST, SPINOR_OP_READ4_FAST, 0, 1, 1, 0x00, 0, 8},
{FLASH_FLAG_READ_WRITE, SPINOR_OP_READ4, 0, 1, 1, 0x00, 0, 0},
{0x00, 0, 0, 0, 0, 0x00, 0, 0},
{FLASH_FLAG_READ_1_4_4, SPINOR_OP_READ_1_4_4_4B, 0, 4, 4, 0x00, 2, 4},
{FLASH_FLAG_READ_1_1_4, SPINOR_OP_READ_1_1_4_4B, 0, 1, 4, 0x00, 0, 8},
{FLASH_FLAG_READ_1_2_2, SPINOR_OP_READ_1_2_2_4B, 0, 2, 2, 0x00, 4, 0},
{FLASH_FLAG_READ_1_1_2, SPINOR_OP_READ_1_1_2_4B, 0, 1, 2, 0x00, 0, 8},
{FLASH_FLAG_READ_FAST, SPINOR_OP_READ_FAST_4B, 0, 1, 1, 0x00, 0, 8},
{FLASH_FLAG_READ_WRITE, SPINOR_OP_READ_4B, 0, 1, 1, 0x00, 0, 0},
{0x00, 0, 0, 0, 0, 0x00, 0, 0},
};
static struct seq_rw_config stfsm_s25fl_write4_configs[] = {

32
drivers/mtd/spi-nor/Kconfig
View File

@ -29,6 +29,16 @@ config MTD_SPI_NOR_USE_4K_SECTORS
Please note that some tools/drivers/filesystems may not work with
4096 B erase size (e.g. UBIFS requires 15 KiB as a minimum).
config SPI_ASPEED_SMC
tristate "Aspeed flash controllers in SPI mode"
depends on ARCH_ASPEED || COMPILE_TEST
depends on HAS_IOMEM && OF
help
This enables support for the Firmware Memory controller (FMC)
in the Aspeed AST2500/AST2400 SoCs when attached to SPI NOR chips,
and support for the SPI flash memory controller (SPI) for
the host firmware. The implementation only supports SPI NOR.
config SPI_ATMEL_QUADSPI
tristate "Atmel Quad SPI Controller"
depends on ARCH_AT91 || (ARM && COMPILE_TEST)
@ -40,7 +50,7 @@ config SPI_ATMEL_QUADSPI
config SPI_CADENCE_QUADSPI
tristate "Cadence Quad SPI controller"
depends on OF && ARM
depends on OF && (ARM || COMPILE_TEST)
help
Enable support for the Cadence Quad SPI Flash controller.
@ -76,4 +86,24 @@ config SPI_NXP_SPIFI
Flash. Enable this option if you have a device with a SPIFI
controller and want to access the Flash as a mtd device.
config SPI_INTEL_SPI
tristate
config SPI_INTEL_SPI_PLATFORM
tristate "Intel PCH/PCU SPI flash platform driver" if EXPERT
depends on X86
select SPI_INTEL_SPI
help
This enables platform support for the Intel PCH/PCU SPI
controller in master mode. This controller is present in modern
Intel hardware and is used to hold BIOS and other persistent
settings. Using this driver it is possible to upgrade BIOS
directly from Linux.
Say N here unless you know what you are doing. Overwriting the
SPI flash may render the system unbootable.
To compile this driver as a module, choose M here: the module
will be called intel-spi-platform.
endif # MTD_SPI_NOR

3
drivers/mtd/spi-nor/Makefile
View File

@ -1,7 +1,10 @@
obj-$(CONFIG_MTD_SPI_NOR) += spi-nor.o
obj-$(CONFIG_SPI_ASPEED_SMC) += aspeed-smc.o
obj-$(CONFIG_SPI_ATMEL_QUADSPI) += atmel-quadspi.o
obj-$(CONFIG_SPI_CADENCE_QUADSPI) += cadence-quadspi.o
obj-$(CONFIG_SPI_FSL_QUADSPI) += fsl-quadspi.o
obj-$(CONFIG_SPI_HISI_SFC) += hisi-sfc.o
obj-$(CONFIG_MTD_MT81xx_NOR) += mtk-quadspi.o
obj-$(CONFIG_SPI_NXP_SPIFI) += nxp-spifi.o
obj-$(CONFIG_SPI_INTEL_SPI) += intel-spi.o
obj-$(CONFIG_SPI_INTEL_SPI_PLATFORM) += intel-spi-platform.o

758
drivers/mtd/spi-nor/aspeed-smc.c Normal file
View File

@ -0,0 +1,758 @@
/*
* ASPEED Static Memory Controller driver
*
* Copyright (c) 2015-2016, IBM Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/bug.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/spi-nor.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/sysfs.h>
#define DEVICE_NAME "aspeed-smc"
/*
* The driver only support SPI flash
*/
enum aspeed_smc_flash_type {
smc_type_nor = 0,
smc_type_nand = 1,
smc_type_spi = 2,
};
struct aspeed_smc_chip;
struct aspeed_smc_info {
u32 maxsize; /* maximum size of chip window */
u8 nce; /* number of chip enables */
bool hastype; /* flash type field exists in config reg */
u8 we0; /* shift for write enable bit for CE0 */
u8 ctl0; /* offset in regs of ctl for CE0 */
void (*set_4b)(struct aspeed_smc_chip *chip);
};
static void aspeed_smc_chip_set_4b_spi_2400(struct aspeed_smc_chip *chip);
static void aspeed_smc_chip_set_4b(struct aspeed_smc_chip *chip);
static const struct aspeed_smc_info fmc_2400_info = {
.maxsize = 64 * 1024 * 1024,
.nce = 5,
.hastype = true,
.we0 = 16,
.ctl0 = 0x10,
.set_4b = aspeed_smc_chip_set_4b,
};
static const struct aspeed_smc_info spi_2400_info = {
.maxsize = 64 * 1024 * 1024,
.nce = 1,
.hastype = false,
.we0 = 0,
.ctl0 = 0x04,
.set_4b = aspeed_smc_chip_set_4b_spi_2400,
};
static const struct aspeed_smc_info fmc_2500_info = {
.maxsize = 256 * 1024 * 1024,
.nce = 3,
.hastype = true,
.we0 = 16,
.ctl0 = 0x10,
.set_4b = aspeed_smc_chip_set_4b,
};
static const struct aspeed_smc_info spi_2500_info = {
.maxsize = 128 * 1024 * 1024,
.nce = 2,
.hastype = false,
.we0 = 16,
.ctl0 = 0x10,
.set_4b = aspeed_smc_chip_set_4b,
};
enum aspeed_smc_ctl_reg_value {
smc_base, /* base value without mode for other commands */
smc_read, /* command reg for (maybe fast) reads */
smc_write, /* command reg for writes */
smc_max,
};
struct aspeed_smc_controller;
struct aspeed_smc_chip {
int cs;
struct aspeed_smc_controller *controller;
void __iomem *ctl; /* control register */
void __iomem *ahb_base; /* base of chip window */
u32 ctl_val[smc_max]; /* control settings */
enum aspeed_smc_flash_type type; /* what type of flash */
struct spi_nor nor;
};
struct aspeed_smc_controller {
struct device *dev;
struct mutex mutex; /* controller access mutex */
const struct aspeed_smc_info *info; /* type info of controller */
void __iomem *regs; /* controller registers */
void __iomem *ahb_base; /* per-chip windows resource */
struct aspeed_smc_chip *chips[0]; /* pointers to attached chips */
};
/*
* SPI Flash Configuration Register (AST2500 SPI)
* or
* Type setting Register (AST2500 FMC).
* CE0 and CE1 can only be of type SPI. CE2 can be of type NOR but the
* driver does not support it.
*/
#define CONFIG_REG 0x0
#define CONFIG_DISABLE_LEGACY BIT(31) /* 1 */
#define CONFIG_CE2_WRITE BIT(18)
#define CONFIG_CE1_WRITE BIT(17)
#define CONFIG_CE0_WRITE BIT(16)
#define CONFIG_CE2_TYPE BIT(4) /* AST2500 FMC only */
#define CONFIG_CE1_TYPE BIT(2) /* AST2500 FMC only */
#define CONFIG_CE0_TYPE BIT(0) /* AST2500 FMC only */
/*
* CE Control Register
*/
#define CE_CONTROL_REG 0x4
/*
* CEx Control Register
*/
#define CONTROL_AAF_MODE BIT(31)
#define CONTROL_IO_MODE_MASK GENMASK(30, 28)
#define CONTROL_IO_DUAL_DATA BIT(29)
#define CONTROL_IO_DUAL_ADDR_DATA (BIT(29) | BIT(28))
#define CONTROL_IO_QUAD_DATA BIT(30)
#define CONTROL_IO_QUAD_ADDR_DATA (BIT(30) | BIT(28))
#define CONTROL_CE_INACTIVE_SHIFT 24
#define CONTROL_CE_INACTIVE_MASK GENMASK(27, \
CONTROL_CE_INACTIVE_SHIFT)
/* 0 = 16T ... 15 = 1T T=HCLK */
#define CONTROL_COMMAND_SHIFT 16
#define CONTROL_DUMMY_COMMAND_OUT BIT(15)
#define CONTROL_IO_DUMMY_HI BIT(14)
#define CONTROL_IO_DUMMY_HI_SHIFT 14
#define CONTROL_CLK_DIV4 BIT(13) /* others */
#define CONTROL_IO_ADDRESS_4B BIT(13) /* AST2400 SPI */
#define CONTROL_RW_MERGE BIT(12)
#define CONTROL_IO_DUMMY_LO_SHIFT 6
#define CONTROL_IO_DUMMY_LO GENMASK(7, \
CONTROL_IO_DUMMY_LO_SHIFT)
#define CONTROL_IO_DUMMY_MASK (CONTROL_IO_DUMMY_HI | \
CONTROL_IO_DUMMY_LO)
#define CONTROL_IO_DUMMY_SET(dummy) \
(((((dummy) >> 2) & 0x1) << CONTROL_IO_DUMMY_HI_SHIFT) | \
(((dummy) & 0x3) << CONTROL_IO_DUMMY_LO_SHIFT))
#define CONTROL_CLOCK_FREQ_SEL_SHIFT 8
#define CONTROL_CLOCK_FREQ_SEL_MASK GENMASK(11, \
CONTROL_CLOCK_FREQ_SEL_SHIFT)
#define CONTROL_LSB_FIRST BIT(5)
#define CONTROL_CLOCK_MODE_3 BIT(4)
#define CONTROL_IN_DUAL_DATA BIT(3)
#define CONTROL_CE_STOP_ACTIVE_CONTROL BIT(2)
#define CONTROL_COMMAND_MODE_MASK GENMASK(1, 0)
#define CONTROL_COMMAND_MODE_NORMAL 0
#define CONTROL_COMMAND_MODE_FREAD 1
#define CONTROL_COMMAND_MODE_WRITE 2
#define CONTROL_COMMAND_MODE_USER 3
#define CONTROL_KEEP_MASK \
(CONTROL_AAF_MODE | CONTROL_CE_INACTIVE_MASK | CONTROL_CLK_DIV4 | \
CONTROL_IO_DUMMY_MASK | CONTROL_CLOCK_FREQ_SEL_MASK | \
CONTROL_LSB_FIRST | CONTROL_CLOCK_MODE_3)
/*
* The Segment Register uses a 8MB unit to encode the start address
* and the end address of the mapping window of a flash SPI slave :
*
* | byte 1 | byte 2 | byte 3 | byte 4 |
* +--------+--------+--------+--------+
* | end | start | 0 | 0 |
*/
#define SEGMENT_ADDR_REG0 0x30
#define SEGMENT_ADDR_START(_r) ((((_r) >> 16) & 0xFF) << 23)
#define SEGMENT_ADDR_END(_r) ((((_r) >> 24) & 0xFF) << 23)
/*
* In user mode all data bytes read or written to the chip decode address
* range are transferred to or from the SPI bus. The range is treated as a
* fifo of arbitratry 1, 2, or 4 byte width but each write has to be aligned
* to its size. The address within the multiple 8kB range is ignored when
* sending bytes to the SPI bus.
*
* On the arm architecture, as of Linux version 4.3, memcpy_fromio and
* memcpy_toio on little endian targets use the optimized memcpy routines
* that were designed for well behavied memory storage. These routines
* have a stutter if the source and destination are not both word aligned,
* once with a duplicate access to the source after aligning to the
* destination to a word boundary, and again with a duplicate access to
* the source when the final byte count is not word aligned.
*
* When writing or reading the fifo this stutter discards data or sends
* too much data to the fifo and can not be used by this driver.
*
* While the low level io string routines that implement the insl family do
* the desired accesses and memory increments, the cross architecture io
* macros make them essentially impossible to use on a memory mapped address
* instead of a a token from the call to iomap of an io port.
*
* These fifo routines use readl and friends to a constant io port and update
* the memory buffer pointer and count via explicit code. The final updates
* to len are optimistically suppressed.
*/
static int aspeed_smc_read_from_ahb(void *buf, void __iomem *src, size_t len)
{
size_t offset = 0;
if (IS_ALIGNED((uintptr_t)src, sizeof(uintptr_t)) &&
IS_ALIGNED((uintptr_t)buf, sizeof(uintptr_t))) {
ioread32_rep(src, buf, len >> 2);
offset = len & ~0x3;
len -= offset;
}
ioread8_rep(src, (u8 *)buf + offset, len);
return 0;
}
static int aspeed_smc_write_to_ahb(void __iomem *dst, const void *buf,
size_t len)
{
size_t offset = 0;
if (IS_ALIGNED((uintptr_t)dst, sizeof(uintptr_t)) &&
IS_ALIGNED((uintptr_t)buf, sizeof(uintptr_t))) {
iowrite32_rep(dst, buf, len >> 2);
offset = len & ~0x3;
len -= offset;
}
iowrite8_rep(dst, (const u8 *)buf + offset, len);
return 0;
}
static inline u32 aspeed_smc_chip_write_bit(struct aspeed_smc_chip *chip)
{
return BIT(chip->controller->info->we0 + chip->cs);
}
static void aspeed_smc_chip_check_config(struct aspeed_smc_chip *chip)
{
struct aspeed_smc_controller *controller = chip->controller;
u32 reg;
reg = readl(controller->regs + CONFIG_REG);
if (reg & aspeed_smc_chip_write_bit(chip))
return;
dev_dbg(controller->dev, "config write is not set ! @%p: 0x%08x\n",
controller->regs + CONFIG_REG, reg);
reg |= aspeed_smc_chip_write_bit(chip);
writel(reg, controller->regs + CONFIG_REG);
}
static void aspeed_smc_start_user(struct spi_nor *nor)
{
struct aspeed_smc_chip *chip = nor->priv;
u32 ctl = chip->ctl_val[smc_base];
/*
* When the chip is controlled in user mode, we need write
* access to send the opcodes to it. So check the config.
*/
aspeed_smc_chip_check_config(chip);
ctl |= CONTROL_COMMAND_MODE_USER |
CONTROL_CE_STOP_ACTIVE_CONTROL;
writel(ctl, chip->ctl);
ctl &= ~CONTROL_CE_STOP_ACTIVE_CONTROL;
writel(ctl, chip->ctl);
}
static void aspeed_smc_stop_user(struct spi_nor *nor)
{
struct aspeed_smc_chip *chip = nor->priv;
u32 ctl = chip->ctl_val[smc_read];
u32 ctl2 = ctl | CONTROL_COMMAND_MODE_USER |
CONTROL_CE_STOP_ACTIVE_CONTROL;
writel(ctl2, chip->ctl); /* stop user CE control */
writel(ctl, chip->ctl); /* default to fread or read mode */
}
static int aspeed_smc_prep(struct spi_nor *nor, enum spi_nor_ops ops)
{
struct aspeed_smc_chip *chip = nor->priv;
mutex_lock(&chip->controller->mutex);
return 0;
}
static void aspeed_smc_unprep(struct spi_nor *nor, enum spi_nor_ops ops)
{
struct aspeed_smc_chip *chip = nor->priv;
mutex_unlock(&chip->controller->mutex);
}
static int aspeed_smc_read_reg(struct spi_nor *nor, u8 opcode, u8 *buf, int len)
{
struct aspeed_smc_chip *chip = nor->priv;
aspeed_smc_start_user(nor);
aspeed_smc_write_to_ahb(chip->ahb_base, &opcode, 1);
aspeed_smc_read_from_ahb(buf, chip->ahb_base, len);
aspeed_smc_stop_user(nor);
return 0;
}
static int aspeed_smc_write_reg(struct spi_nor *nor, u8 opcode, u8 *buf,
int len)
{
struct aspeed_smc_chip *chip = nor->priv;
aspeed_smc_start_user(nor);
aspeed_smc_write_to_ahb(chip->ahb_base, &opcode, 1);
aspeed_smc_write_to_ahb(chip->ahb_base, buf, len);
aspeed_smc_stop_user(nor);
return 0;
}
static void aspeed_smc_send_cmd_addr(struct spi_nor *nor, u8 cmd, u32 addr)
{
struct aspeed_smc_chip *chip = nor->priv;
__be32 temp;
u32 cmdaddr;
switch (nor->addr_width) {
default:
WARN_ONCE(1, "Unexpected address width %u, defaulting to 3\n",
nor->addr_width);
/* FALLTHROUGH */
case 3:
cmdaddr = addr & 0xFFFFFF;
cmdaddr |= cmd << 24;
temp = cpu_to_be32(cmdaddr);
aspeed_smc_write_to_ahb(chip->ahb_base, &temp, 4);
break;
case 4:
temp = cpu_to_be32(addr);
aspeed_smc_write_to_ahb(chip->ahb_base, &cmd, 1);
aspeed_smc_write_to_ahb(chip->ahb_base, &temp, 4);
break;
}
}
static ssize_t aspeed_smc_read_user(struct spi_nor *nor, loff_t from,
size_t len, u_char *read_buf)
{
struct aspeed_smc_chip *chip = nor->priv;
int i;
u8 dummy = 0xFF;
aspeed_smc_start_user(nor);
aspeed_smc_send_cmd_addr(nor, nor->read_opcode, from);
for (i = 0; i < chip->nor.read_dummy / 8; i++)
aspeed_smc_write_to_ahb(chip->ahb_base, &dummy, sizeof(dummy));
aspeed_smc_read_from_ahb(read_buf, chip->ahb_base, len);
aspeed_smc_stop_user(nor);
return len;
}
static ssize_t aspeed_smc_write_user(struct spi_nor *nor, loff_t to,
size_t len, const u_char *write_buf)
{
struct aspeed_smc_chip *chip = nor->priv;
aspeed_smc_start_user(nor);
aspeed_smc_send_cmd_addr(nor, nor->program_opcode, to);
aspeed_smc_write_to_ahb(chip->ahb_base, write_buf, len);
aspeed_smc_stop_user(nor);
return len;
}
static int aspeed_smc_unregister(struct aspeed_smc_controller *controller)
{
struct aspeed_smc_chip *chip;
int n;
for (n = 0; n < controller->info->nce; n++) {
chip = controller->chips[n];
if (chip)
mtd_device_unregister(&chip->nor.mtd);
}
return 0;
}
static int aspeed_smc_remove(struct platform_device *dev)
{
return aspeed_smc_unregister(platform_get_drvdata(dev));
}
static const struct of_device_id aspeed_smc_matches[] = {
{ .compatible = "aspeed,ast2400-fmc", .data = &fmc_2400_info },
{ .compatible = "aspeed,ast2400-spi", .data = &spi_2400_info },
{ .compatible = "aspeed,ast2500-fmc", .data = &fmc_2500_info },
{ .compatible = "aspeed,ast2500-spi", .data = &spi_2500_info },
{ }
};
MODULE_DEVICE_TABLE(of, aspeed_smc_matches);
/*
* Each chip has a mapping window defined by a segment address
* register defining a start and an end address on the AHB bus. These
* addresses can be configured to fit the chip size and offer a
* contiguous memory region across chips. For the moment, we only
* check that each chip segment is valid.
*/
static void __iomem *aspeed_smc_chip_base(struct aspeed_smc_chip *chip,
struct resource *res)
{
struct aspeed_smc_controller *controller = chip->controller;
u32 offset = 0;
u32 reg;
if (controller->info->nce > 1) {
reg = readl(controller->regs + SEGMENT_ADDR_REG0 +
chip->cs * 4);
if (SEGMENT_ADDR_START(reg) >= SEGMENT_ADDR_END(reg))
return NULL;
offset = SEGMENT_ADDR_START(reg) - res->start;
}
return controller->ahb_base + offset;
}
static void aspeed_smc_chip_enable_write(struct aspeed_smc_chip *chip)
{
struct aspeed_smc_controller *controller = chip->controller;
u32 reg;
reg = readl(controller->regs + CONFIG_REG);
reg |= aspeed_smc_chip_write_bit(chip);
writel(reg, controller->regs + CONFIG_REG);
}
static void aspeed_smc_chip_set_type(struct aspeed_smc_chip *chip, int type)
{
struct aspeed_smc_controller *controller = chip->controller;
u32 reg;
chip->type = type;
reg = readl(controller->regs + CONFIG_REG);
reg &= ~(3 << (chip->cs * 2));
reg |= chip->type << (chip->cs * 2);
writel(reg, controller->regs + CONFIG_REG);
}
/*
* The AST2500 FMC flash controller should be strapped by hardware, or
* autodetected, but the AST2500 SPI flash needs to be set.
*/
static void aspeed_smc_chip_set_4b(struct aspeed_smc_chip *chip)
{
struct aspeed_smc_controller *controller = chip->controller;
u32 reg;
if (chip->controller->info == &spi_2500_info) {
reg = readl(controller->regs + CE_CONTROL_REG);
reg |= 1 << chip->cs;
writel(reg, controller->regs + CE_CONTROL_REG);
}
}
/*
* The AST2400 SPI flash controller does not have a CE Control
* register. It uses the CE0 control register to set 4Byte mode at the
* controller level.
*/
static void aspeed_smc_chip_set_4b_spi_2400(struct aspeed_smc_chip *chip)
{
chip->ctl_val[smc_base] |= CONTROL_IO_ADDRESS_4B;
chip->ctl_val[smc_read] |= CONTROL_IO_ADDRESS_4B;
}
static int aspeed_smc_chip_setup_init(struct aspeed_smc_chip *chip,
struct resource *res)
{
struct aspeed_smc_controller *controller = chip->controller;
const struct aspeed_smc_info *info = controller->info;
u32 reg, base_reg;
/*
* Always turn on the write enable bit to allow opcodes to be
* sent in user mode.
*/
aspeed_smc_chip_enable_write(chip);
/* The driver only supports SPI type flash */
if (info->hastype)
aspeed_smc_chip_set_type(chip, smc_type_spi);
/*
* Configure chip base address in memory
*/
chip->ahb_base = aspeed_smc_chip_base(chip, res);
if (!chip->ahb_base) {
dev_warn(chip->nor.dev, "CE segment window closed.\n");
return -EINVAL;
}
/*
* Get value of the inherited control register. U-Boot usually
* does some timing calibration on the FMC chip, so it's good
* to keep them. In the future, we should handle calibration
* from Linux.
*/
reg = readl(chip->ctl);
dev_dbg(controller->dev, "control register: %08x\n", reg);
base_reg = reg & CONTROL_KEEP_MASK;
if (base_reg != reg) {
dev_dbg(controller->dev,
"control register changed to: %08x\n",
base_reg);
}
chip->ctl_val[smc_base] = base_reg;
/*
* Retain the prior value of the control register as the
* default if it was normal access mode. Otherwise start with
* the sanitized base value set to read mode.
*/
if ((reg & CONTROL_COMMAND_MODE_MASK) ==
CONTROL_COMMAND_MODE_NORMAL)
chip->ctl_val[smc_read] = reg;
else
chip->ctl_val[smc_read] = chip->ctl_val[smc_base] |
CONTROL_COMMAND_MODE_NORMAL;
dev_dbg(controller->dev, "default control register: %08x\n",
chip->ctl_val[smc_read]);
return 0;
}
static int aspeed_smc_chip_setup_finish(struct aspeed_smc_chip *chip)
{
struct aspeed_smc_controller *controller = chip->controller;
const struct aspeed_smc_info *info = controller->info;
u32 cmd;
if (chip->nor.addr_width == 4 && info->set_4b)
info->set_4b(chip);
/*
* base mode has not been optimized yet. use it for writes.
*/
chip->ctl_val[smc_write] = chip->ctl_val[smc_base] |
chip->nor.program_opcode << CONTROL_COMMAND_SHIFT |
CONTROL_COMMAND_MODE_WRITE;
dev_dbg(controller->dev, "write control register: %08x\n",
chip->ctl_val[smc_write]);
/*
* TODO: Adjust clocks if fast read is supported and interpret
* SPI-NOR flags to adjust controller settings.
*/
switch (chip->nor.flash_read) {
case SPI_NOR_NORMAL:
cmd = CONTROL_COMMAND_MODE_NORMAL;
break;
case SPI_NOR_FAST:
cmd = CONTROL_COMMAND_MODE_FREAD;
break;
default:
dev_err(chip->nor.dev, "unsupported SPI read mode\n");
return -EINVAL;
}
chip->ctl_val[smc_read] |= cmd |
CONTROL_IO_DUMMY_SET(chip->nor.read_dummy / 8);
dev_dbg(controller->dev, "base control register: %08x\n",
chip->ctl_val[smc_read]);
return 0;
}
static int aspeed_smc_setup_flash(struct aspeed_smc_controller *controller,
struct device_node *np, struct resource *r)
{
const struct aspeed_smc_info *info = controller->info;
struct device *dev = controller->dev;
struct device_node *child;
unsigned int cs;
int ret = -ENODEV;
for_each_available_child_of_node(np, child) {
struct aspeed_smc_chip *chip;
struct spi_nor *nor;
struct mtd_info *mtd;
/* This driver does not support NAND or NOR flash devices. */
if (!of_device_is_compatible(child, "jedec,spi-nor"))
continue;
ret = of_property_read_u32(child, "reg", &cs);
if (ret) {
dev_err(dev, "Couldn't not read chip select.\n");
break;
}
if (cs >= info->nce) {
dev_err(dev, "Chip select %d out of range.\n",
cs);
ret = -ERANGE;
break;
}
if (controller->chips[cs]) {
dev_err(dev, "Chip select %d already in use by %s\n",
cs, dev_name(controller->chips[cs]->nor.dev));
ret = -EBUSY;
break;
}
chip = devm_kzalloc(controller->dev, sizeof(*chip), GFP_KERNEL);
if (!chip) {
ret = -ENOMEM;
break;
}
chip->controller = controller;
chip->ctl = controller->regs + info->ctl0 + cs * 4;
chip->cs = cs;
nor = &chip->nor;
mtd = &nor->mtd;
nor->dev = dev;
nor->priv = chip;
spi_nor_set_flash_node(nor, child);
nor->read = aspeed_smc_read_user;
nor->write = aspeed_smc_write_user;
nor->read_reg = aspeed_smc_read_reg;
nor->write_reg = aspeed_smc_write_reg;
nor->prepare = aspeed_smc_prep;
nor->unprepare = aspeed_smc_unprep;
ret = aspeed_smc_chip_setup_init(chip, r);
if (ret)
break;
/*
* TODO: Add support for SPI_NOR_QUAD and SPI_NOR_DUAL
* attach when board support is present as determined
* by of property.
*/
ret = spi_nor_scan(nor, NULL, SPI_NOR_NORMAL);
if (ret)
break;
ret = aspeed_smc_chip_setup_finish(chip);
if (ret)
break;
ret = mtd_device_register(mtd, NULL, 0);
if (ret)
break;
controller->chips[cs] = chip;
}
if (ret)
aspeed_smc_unregister(controller);
return ret;
}
static int aspeed_smc_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct device *dev = &pdev->dev;
struct aspeed_smc_controller *controller;
const struct of_device_id *match;
const struct aspeed_smc_info *info;
struct resource *res;
int ret;
match = of_match_device(aspeed_smc_matches, &pdev->dev);
if (!match || !match->data)
return -ENODEV;
info = match->data;
controller = devm_kzalloc(&pdev->dev, sizeof(*controller) +
info->nce * sizeof(controller->chips[0]), GFP_KERNEL);
if (!controller)
return -ENOMEM;
controller->info = info;
controller->dev = dev;
mutex_init(&controller->mutex);
platform_set_drvdata(pdev, controller);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
controller->regs = devm_ioremap_resource(dev, res);
if (IS_ERR(controller->regs)) {
dev_err(dev, "Cannot remap controller address.\n");
return PTR_ERR(controller->regs);
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
controller->ahb_base = devm_ioremap_resource(dev, res);
if (IS_ERR(controller->ahb_base)) {
dev_err(dev, "Cannot remap controller address.\n");
return PTR_ERR(controller->ahb_base);
}
ret = aspeed_smc_setup_flash(controller, np, res);
if (ret)
dev_err(dev, "Aspeed SMC probe failed %d\n", ret);
return ret;
}
static struct platform_driver aspeed_smc_driver = {
.probe = aspeed_smc_probe,
.remove = aspeed_smc_remove,
.driver = {
.name = DEVICE_NAME,
.of_match_table = aspeed_smc_matches,
}
};
module_platform_driver(aspeed_smc_driver);
MODULE_DESCRIPTION("ASPEED Static Memory Controller Driver");
MODULE_AUTHOR("Cedric Le Goater <clg@kaod.org>");
MODULE_LICENSE("GPL v2");

10
drivers/mtd/spi-nor/cadence-quadspi.c
View File

@ -526,7 +526,8 @@ static int cqspi_indirect_read_execute(struct spi_nor *nor,
bytes_to_read *= cqspi->fifo_width;
bytes_to_read = bytes_to_read > remaining ?
remaining : bytes_to_read;
readsl(ahb_base, rxbuf, DIV_ROUND_UP(bytes_to_read, 4));
ioread32_rep(ahb_base, rxbuf,
DIV_ROUND_UP(bytes_to_read, 4));
rxbuf += bytes_to_read;
remaining -= bytes_to_read;
bytes_to_read = cqspi_get_rd_sram_level(cqspi);
@ -610,7 +611,8 @@ static int cqspi_indirect_write_execute(struct spi_nor *nor,
while (remaining > 0) {
write_bytes = remaining > page_size ? page_size : remaining;
writesl(cqspi->ahb_base, txbuf, DIV_ROUND_UP(write_bytes, 4));
iowrite32_rep(cqspi->ahb_base, txbuf,
DIV_ROUND_UP(write_bytes, 4));
ret = wait_for_completion_timeout(&cqspi->transfer_complete,
msecs_to_jiffies
@ -891,7 +893,7 @@ static ssize_t cqspi_write(struct spi_nor *nor, loff_t to,
if (ret)
return ret;
return (ret < 0) ? ret : len;
return len;
}
static ssize_t cqspi_read(struct spi_nor *nor, loff_t from,
@ -911,7 +913,7 @@ static ssize_t cqspi_read(struct spi_nor *nor, loff_t from,
if (ret)
return ret;
return (ret < 0) ? ret : len;
return len;
}
static int cqspi_erase(struct spi_nor *nor, loff_t offs)

48
drivers/mtd/spi-nor/fsl-quadspi.c
View File

@ -193,7 +193,7 @@
#define QUADSPI_LUT_NUM 64
/* SEQID -- we can have 16 seqids at most. */
#define SEQID_QUAD_READ 0
#define SEQID_READ 0
#define SEQID_WREN 1
#define SEQID_WRDI 2
#define SEQID_RDSR 3
@ -373,32 +373,26 @@ static void fsl_qspi_init_lut(struct fsl_qspi *q)
void __iomem *base = q->iobase;
int rxfifo = q->devtype_data->rxfifo;
u32 lut_base;
u8 cmd, addrlen, dummy;
int i;
struct spi_nor *nor = &q->nor[0];
u8 addrlen = (nor->addr_width == 3) ? ADDR24BIT : ADDR32BIT;
u8 read_op = nor->read_opcode;
u8 read_dm = nor->read_dummy;
fsl_qspi_unlock_lut(q);
/* Clear all the LUT table */
for (i = 0; i < QUADSPI_LUT_NUM; i++)
qspi_writel(q, 0, base + QUADSPI_LUT_BASE + i * 4);
/* Quad Read */
lut_base = SEQID_QUAD_READ * 4;
/* Read */
lut_base = SEQID_READ * 4;
if (q->nor_size <= SZ_16M) {
cmd = SPINOR_OP_READ_1_1_4;
addrlen = ADDR24BIT;
dummy = 8;
} else {
/* use the 4-byte address */
cmd = SPINOR_OP_READ_1_1_4;
addrlen = ADDR32BIT;
dummy = 8;
}
qspi_writel(q, LUT0(CMD, PAD1, cmd) | LUT1(ADDR, PAD1, addrlen),
qspi_writel(q, LUT0(CMD, PAD1, read_op) | LUT1(ADDR, PAD1, addrlen),
base + QUADSPI_LUT(lut_base));
qspi_writel(q, LUT0(DUMMY, PAD1, dummy) | LUT1(FSL_READ, PAD4, rxfifo),
qspi_writel(q, LUT0(DUMMY, PAD1, read_dm) |
LUT1(FSL_READ, PAD4, rxfifo),
base + QUADSPI_LUT(lut_base + 1));
/* Write enable */
@ -409,16 +403,8 @@ static void fsl_qspi_init_lut(struct fsl_qspi *q)
/* Page Program */
lut_base = SEQID_PP * 4;
if (q->nor_size <= SZ_16M) {
cmd = SPINOR_OP_PP;
addrlen = ADDR24BIT;
} else {
/* use the 4-byte address */
cmd = SPINOR_OP_PP;
addrlen = ADDR32BIT;
}
qspi_writel(q, LUT0(CMD, PAD1, cmd) | LUT1(ADDR, PAD1, addrlen),
qspi_writel(q, LUT0(CMD, PAD1, nor->program_opcode) |
LUT1(ADDR, PAD1, addrlen),
base + QUADSPI_LUT(lut_base));
qspi_writel(q, LUT0(FSL_WRITE, PAD1, 0),
base + QUADSPI_LUT(lut_base + 1));
@ -432,10 +418,8 @@ static void fsl_qspi_init_lut(struct fsl_qspi *q)
/* Erase a sector */
lut_base = SEQID_SE * 4;
cmd = q->nor[0].erase_opcode;
addrlen = q->nor_size <= SZ_16M ? ADDR24BIT : ADDR32BIT;
qspi_writel(q, LUT0(CMD, PAD1, cmd) | LUT1(ADDR, PAD1, addrlen),
qspi_writel(q, LUT0(CMD, PAD1, nor->erase_opcode) |
LUT1(ADDR, PAD1, addrlen),
base + QUADSPI_LUT(lut_base));
/* Erase the whole chip */
@ -484,7 +468,7 @@ static int fsl_qspi_get_seqid(struct fsl_qspi *q, u8 cmd)
{
switch (cmd) {
case SPINOR_OP_READ_1_1_4:
return SEQID_QUAD_READ;
return SEQID_READ;
case SPINOR_OP_WREN:
return SEQID_WREN;
case SPINOR_OP_WRDI:

57
drivers/mtd/spi-nor/intel-spi-platform.c Normal file
View File

@ -0,0 +1,57 @@
/*
* Intel PCH/PCU SPI flash platform driver.
*
* Copyright (C) 2016, Intel Corporation
* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/ioport.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include "intel-spi.h"
static int intel_spi_platform_probe(struct platform_device *pdev)
{
struct intel_spi_boardinfo *info;
struct intel_spi *ispi;
struct resource *mem;
info = dev_get_platdata(&pdev->dev);
if (!info)
return -EINVAL;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ispi = intel_spi_probe(&pdev->dev, mem, info);
if (IS_ERR(ispi))
return PTR_ERR(ispi);
platform_set_drvdata(pdev, ispi);
return 0;
}
static int intel_spi_platform_remove(struct platform_device *pdev)
{
struct intel_spi *ispi = platform_get_drvdata(pdev);
return intel_spi_remove(ispi);
}
static struct platform_driver intel_spi_platform_driver = {
.probe = intel_spi_platform_probe,
.remove = intel_spi_platform_remove,
.driver = {
.name = "intel-spi",
},
};
module_platform_driver(intel_spi_platform_driver);
MODULE_DESCRIPTION("Intel PCH/PCU SPI flash platform driver");
MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:intel-spi");

777
drivers/mtd/spi-nor/intel-spi.c Normal file
View File

@ -0,0 +1,777 @@
/*
* Intel PCH/PCU SPI flash driver.
*
* Copyright (C) 2016, Intel Corporation
* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/err.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/sizes.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/spi-nor.h>
#include <linux/platform_data/intel-spi.h>
#include "intel-spi.h"
/* Offsets are from @ispi->base */
#define BFPREG 0x00
#define HSFSTS_CTL 0x04
#define HSFSTS_CTL_FSMIE BIT(31)
#define HSFSTS_CTL_FDBC_SHIFT 24
#define HSFSTS_CTL_FDBC_MASK (0x3f << HSFSTS_CTL_FDBC_SHIFT)
#define HSFSTS_CTL_FCYCLE_SHIFT 17
#define HSFSTS_CTL_FCYCLE_MASK (0x0f << HSFSTS_CTL_FCYCLE_SHIFT)
/* HW sequencer opcodes */
#define HSFSTS_CTL_FCYCLE_READ (0x00 << HSFSTS_CTL_FCYCLE_SHIFT)
#define HSFSTS_CTL_FCYCLE_WRITE (0x02 << HSFSTS_CTL_FCYCLE_SHIFT)
#define HSFSTS_CTL_FCYCLE_ERASE (0x03 << HSFSTS_CTL_FCYCLE_SHIFT)
#define HSFSTS_CTL_FCYCLE_ERASE_64K (0x04 << HSFSTS_CTL_FCYCLE_SHIFT)
#define HSFSTS_CTL_FCYCLE_RDID (0x06 << HSFSTS_CTL_FCYCLE_SHIFT)
#define HSFSTS_CTL_FCYCLE_WRSR (0x07 << HSFSTS_CTL_FCYCLE_SHIFT)
#define HSFSTS_CTL_FCYCLE_RDSR (0x08 << HSFSTS_CTL_FCYCLE_SHIFT)
#define HSFSTS_CTL_FGO BIT(16)
#define HSFSTS_CTL_FLOCKDN BIT(15)
#define HSFSTS_CTL_FDV BIT(14)
#define HSFSTS_CTL_SCIP BIT(5)
#define HSFSTS_CTL_AEL BIT(2)
#define HSFSTS_CTL_FCERR BIT(1)
#define HSFSTS_CTL_FDONE BIT(0)
#define FADDR 0x08
#define DLOCK 0x0c
#define FDATA(n) (0x10 + ((n) * 4))
#define FRACC 0x50
#define FREG(n) (0x54 + ((n) * 4))
#define FREG_BASE_MASK 0x3fff
#define FREG_LIMIT_SHIFT 16
#define FREG_LIMIT_MASK (0x03fff << FREG_LIMIT_SHIFT)
/* Offset is from @ispi->pregs */
#define PR(n) ((n) * 4)
#define PR_WPE BIT(31)
#define PR_LIMIT_SHIFT 16
#define PR_LIMIT_MASK (0x3fff << PR_LIMIT_SHIFT)
#define PR_RPE BIT(15)
#define PR_BASE_MASK 0x3fff
/* Last PR is GPR0 */
#define PR_NUM (5 + 1)
/* Offsets are from @ispi->sregs */
#define SSFSTS_CTL 0x00
#define SSFSTS_CTL_FSMIE BIT(23)
#define SSFSTS_CTL_DS BIT(22)
#define SSFSTS_CTL_DBC_SHIFT 16
#define SSFSTS_CTL_SPOP BIT(11)
#define SSFSTS_CTL_ACS BIT(10)
#define SSFSTS_CTL_SCGO BIT(9)
#define SSFSTS_CTL_COP_SHIFT 12
#define SSFSTS_CTL_FRS BIT(7)
#define SSFSTS_CTL_DOFRS BIT(6)
#define SSFSTS_CTL_AEL BIT(4)
#define SSFSTS_CTL_FCERR BIT(3)
#define SSFSTS_CTL_FDONE BIT(2)
#define SSFSTS_CTL_SCIP BIT(0)
#define PREOP_OPTYPE 0x04
#define OPMENU0 0x08
#define OPMENU1 0x0c
/* CPU specifics */
#define BYT_PR 0x74
#define BYT_SSFSTS_CTL 0x90
#define BYT_BCR 0xfc
#define BYT_BCR_WPD BIT(0)
#define BYT_FREG_NUM 5
#define LPT_PR 0x74
#define LPT_SSFSTS_CTL 0x90
#define LPT_FREG_NUM 5
#define BXT_PR 0x84
#define BXT_SSFSTS_CTL 0xa0
#define BXT_FREG_NUM 12
#define INTEL_SPI_TIMEOUT 5000 /* ms */
#define INTEL_SPI_FIFO_SZ 64
/**
* struct intel_spi - Driver private data
* @dev: Device pointer
* @info: Pointer to board specific info
* @nor: SPI NOR layer structure
* @base: Beginning of MMIO space
* @pregs: Start of protection registers
* @sregs: Start of software sequencer registers
* @nregions: Maximum number of regions
* @writeable: Is the chip writeable
* @swseq: Use SW sequencer in register reads/writes
* @erase_64k: 64k erase supported
* @opcodes: Opcodes which are supported. This are programmed by BIOS
* before it locks down the controller.
* @preopcodes: Preopcodes which are supported.
*/
struct intel_spi {
struct device *dev;
const struct intel_spi_boardinfo *info;
struct spi_nor nor;
void __iomem *base;
void __iomem *pregs;
void __iomem *sregs;
size_t nregions;
bool writeable;
bool swseq;
bool erase_64k;
u8 opcodes[8];
u8 preopcodes[2];
};
static bool writeable;
module_param(writeable, bool, 0);
MODULE_PARM_DESC(writeable, "Enable write access to SPI flash chip (default=0)");
static void intel_spi_dump_regs(struct intel_spi *ispi)
{
u32 value;
int i;
dev_dbg(ispi->dev, "BFPREG=0x%08x\n", readl(ispi->base + BFPREG));
value = readl(ispi->base + HSFSTS_CTL);
dev_dbg(ispi->dev, "HSFSTS_CTL=0x%08x\n", value);
if (value & HSFSTS_CTL_FLOCKDN)
dev_dbg(ispi->dev, "-> Locked\n");
dev_dbg(ispi->dev, "FADDR=0x%08x\n", readl(ispi->base + FADDR));
dev_dbg(ispi->dev, "DLOCK=0x%08x\n", readl(ispi->base + DLOCK));
for (i = 0; i < 16; i++)
dev_dbg(ispi->dev, "FDATA(%d)=0x%08x\n",
i, readl(ispi->base + FDATA(i)));
dev_dbg(ispi->dev, "FRACC=0x%08x\n", readl(ispi->base + FRACC));
for (i = 0; i < ispi->nregions; i++)
dev_dbg(ispi->dev, "FREG(%d)=0x%08x\n", i,
readl(ispi->base + FREG(i)));
for (i = 0; i < PR_NUM; i++)
dev_dbg(ispi->dev, "PR(%d)=0x%08x\n", i,
readl(ispi->pregs + PR(i)));
value = readl(ispi->sregs + SSFSTS_CTL);
dev_dbg(ispi->dev, "SSFSTS_CTL=0x%08x\n", value);
dev_dbg(ispi->dev, "PREOP_OPTYPE=0x%08x\n",
readl(ispi->sregs + PREOP_OPTYPE));
dev_dbg(ispi->dev, "OPMENU0=0x%08x\n", readl(ispi->sregs + OPMENU0));
dev_dbg(ispi->dev, "OPMENU1=0x%08x\n", readl(ispi->sregs + OPMENU1));
if (ispi->info->type == INTEL_SPI_BYT)
dev_dbg(ispi->dev, "BCR=0x%08x\n", readl(ispi->base + BYT_BCR));
dev_dbg(ispi->dev, "Protected regions:\n");
for (i = 0; i < PR_NUM; i++) {
u32 base, limit;
value = readl(ispi->pregs + PR(i));
if (!(value & (PR_WPE | PR_RPE)))
continue;
limit = (value & PR_LIMIT_MASK) >> PR_LIMIT_SHIFT;
base = value & PR_BASE_MASK;
dev_dbg(ispi->dev, " %02d base: 0x%08x limit: 0x%08x [%c%c]\n",
i, base << 12, (limit << 12) | 0xfff,
value & PR_WPE ? 'W' : '.',
value & PR_RPE ? 'R' : '.');
}
dev_dbg(ispi->dev, "Flash regions:\n");
for (i = 0; i < ispi->nregions; i++) {
u32 region, base, limit;
region = readl(ispi->base + FREG(i));
base = region & FREG_BASE_MASK;
limit = (region & FREG_LIMIT_MASK) >> FREG_LIMIT_SHIFT;
if (base >= limit || (i > 0 && limit == 0))
dev_dbg(ispi->dev, " %02d disabled\n", i);
else
dev_dbg(ispi->dev, " %02d base: 0x%08x limit: 0x%08x\n",
i, base << 12, (limit << 12) | 0xfff);
}
dev_dbg(ispi->dev, "Using %cW sequencer for register access\n",
ispi->swseq ? 'S' : 'H');
}
/* Reads max INTEL_SPI_FIFO_SZ bytes from the device fifo */
static int intel_spi_read_block(struct intel_spi *ispi, void *buf, size_t size)
{
size_t bytes;
int i = 0;
if (size > INTEL_SPI_FIFO_SZ)
return -EINVAL;
while (size > 0) {
bytes = min_t(size_t, size, 4);
memcpy_fromio(buf, ispi->base + FDATA(i), bytes);
size -= bytes;
buf += bytes;
i++;
}
return 0;
}
/* Writes max INTEL_SPI_FIFO_SZ bytes to the device fifo */
static int intel_spi_write_block(struct intel_spi *ispi, const void *buf,
size_t size)
{
size_t bytes;
int i = 0;
if (size > INTEL_SPI_FIFO_SZ)
return -EINVAL;
while (size > 0) {
bytes = min_t(size_t, size, 4);
memcpy_toio(ispi->base + FDATA(i), buf, bytes);
size -= bytes;
buf += bytes;
i++;
}
return 0;
}
static int intel_spi_wait_hw_busy(struct intel_spi *ispi)
{
u32 val;
return readl_poll_timeout(ispi->base + HSFSTS_CTL, val,
!(val & HSFSTS_CTL_SCIP), 0,
INTEL_SPI_TIMEOUT * 1000);
}
static int intel_spi_wait_sw_busy(struct intel_spi *ispi)
{
u32 val;
return readl_poll_timeout(ispi->sregs + SSFSTS_CTL, val,
!(val & SSFSTS_CTL_SCIP), 0,
INTEL_SPI_TIMEOUT * 1000);
}
static int intel_spi_init(struct intel_spi *ispi)
{
u32 opmenu0, opmenu1, val;
int i;
switch (ispi->info->type) {
case INTEL_SPI_BYT:
ispi->sregs = ispi->base + BYT_SSFSTS_CTL;
ispi->pregs = ispi->base + BYT_PR;
ispi->nregions = BYT_FREG_NUM;
if (writeable) {
/* Disable write protection */
val = readl(ispi->base + BYT_BCR);
if (!(val & BYT_BCR_WPD)) {
val |= BYT_BCR_WPD;
writel(val, ispi->base + BYT_BCR);
val = readl(ispi->base + BYT_BCR);
}
ispi->writeable = !!(val & BYT_BCR_WPD);
}
break;
case INTEL_SPI_LPT:
ispi->sregs = ispi->base + LPT_SSFSTS_CTL;
ispi->pregs = ispi->base + LPT_PR;
ispi->nregions = LPT_FREG_NUM;
break;
case INTEL_SPI_BXT:
ispi->sregs = ispi->base + BXT_SSFSTS_CTL;
ispi->pregs = ispi->base + BXT_PR;
ispi->nregions = BXT_FREG_NUM;
ispi->erase_64k = true;
break;
default:
return -EINVAL;
}
/* Disable #SMI generation */
val = readl(ispi->base + HSFSTS_CTL);
val &= ~HSFSTS_CTL_FSMIE;
writel(val, ispi->base + HSFSTS_CTL);
/*
* BIOS programs allowed opcodes and then locks down the register.
* So read back what opcodes it decided to support. That's the set
* we are going to support as well.
*/
opmenu0 = readl(ispi->sregs + OPMENU0);
opmenu1 = readl(ispi->sregs + OPMENU1);
/*
* Some controllers can only do basic operations using hardware
* sequencer. All other operations are supposed to be carried out
* using software sequencer. If we find that BIOS has programmed
* opcodes for the software sequencer we use that over the hardware
* sequencer.
*/
if (opmenu0 && opmenu1) {
for (i = 0; i < ARRAY_SIZE(ispi->opcodes) / 2; i++) {
ispi->opcodes[i] = opmenu0 >> i * 8;
ispi->opcodes[i + 4] = opmenu1 >> i * 8;
}
val = readl(ispi->sregs + PREOP_OPTYPE);
ispi->preopcodes[0] = val;
ispi->preopcodes[1] = val >> 8;
/* Disable #SMI generation from SW sequencer */
val = readl(ispi->sregs + SSFSTS_CTL);
val &= ~SSFSTS_CTL_FSMIE;
writel(val, ispi->sregs + SSFSTS_CTL);
ispi->swseq = true;
}
intel_spi_dump_regs(ispi);
return 0;
}
static int intel_spi_opcode_index(struct intel_spi *ispi, u8 opcode)
{
int i;
for (i = 0; i < ARRAY_SIZE(ispi->opcodes); i++)
if (ispi->opcodes[i] == opcode)
return i;
return -EINVAL;
}
static int intel_spi_hw_cycle(struct intel_spi *ispi, u8 opcode, u8 *buf,
int len)
{
u32 val, status;
int ret;
val = readl(ispi->base + HSFSTS_CTL);
val &= ~(HSFSTS_CTL_FCYCLE_MASK | HSFSTS_CTL_FDBC_MASK);
switch (opcode) {
case SPINOR_OP_RDID:
val |= HSFSTS_CTL_FCYCLE_RDID;
break;
case SPINOR_OP_WRSR:
val |= HSFSTS_CTL_FCYCLE_WRSR;
break;
case SPINOR_OP_RDSR:
val |= HSFSTS_CTL_FCYCLE_RDSR;
break;
default:
return -EINVAL;
}
val |= (len - 1) << HSFSTS_CTL_FDBC_SHIFT;
val |= HSFSTS_CTL_FCERR | HSFSTS_CTL_FDONE;
val |= HSFSTS_CTL_FGO;
writel(val, ispi->base + HSFSTS_CTL);
ret = intel_spi_wait_hw_busy(ispi);
if (ret)
return ret;
status = readl(ispi->base + HSFSTS_CTL);
if (status & HSFSTS_CTL_FCERR)
return -EIO;
else if (status & HSFSTS_CTL_AEL)
return -EACCES;
return 0;
}
static int intel_spi_sw_cycle(struct intel_spi *ispi, u8 opcode, u8 *buf,
int len)
{
u32 val, status;
int ret;
ret = intel_spi_opcode_index(ispi, opcode);
if (ret < 0)
return ret;
val = (len << SSFSTS_CTL_DBC_SHIFT) | SSFSTS_CTL_DS;
val |= ret << SSFSTS_CTL_COP_SHIFT;
val |= SSFSTS_CTL_FCERR | SSFSTS_CTL_FDONE;
val |= SSFSTS_CTL_SCGO;
writel(val, ispi->sregs + SSFSTS_CTL);
ret = intel_spi_wait_sw_busy(ispi);
if (ret)
return ret;
status = readl(ispi->base + SSFSTS_CTL);
if (status & SSFSTS_CTL_FCERR)
return -EIO;
else if (status & SSFSTS_CTL_AEL)
return -EACCES;
return 0;
}
static int intel_spi_read_reg(struct spi_nor *nor, u8 opcode, u8 *buf, int len)
{
struct intel_spi *ispi = nor->priv;
int ret;
/* Address of the first chip */
writel(0, ispi->base + FADDR);
if (ispi->swseq)
ret = intel_spi_sw_cycle(ispi, opcode, buf, len);
else
ret = intel_spi_hw_cycle(ispi, opcode, buf, len);
if (ret)
return ret;
return intel_spi_read_block(ispi, buf, len);
}
static int intel_spi_write_reg(struct spi_nor *nor, u8 opcode, u8 *buf, int len)
{
struct intel_spi *ispi = nor->priv;
int ret;
/*
* This is handled with atomic operation and preop code in Intel
* controller so skip it here now.
*/
if (opcode == SPINOR_OP_WREN)
return 0;
writel(0, ispi->base + FADDR);
/* Write the value beforehand */
ret = intel_spi_write_block(ispi, buf, len);
if (ret)
return ret;
if (ispi->swseq)
return intel_spi_sw_cycle(ispi, opcode, buf, len);
return intel_spi_hw_cycle(ispi, opcode, buf, len);
}
static ssize_t intel_spi_read(struct spi_nor *nor, loff_t from, size_t len,
u_char *read_buf)
{
struct intel_spi *ispi = nor->priv;
size_t block_size, retlen = 0;
u32 val, status;
ssize_t ret;
switch (nor->read_opcode) {
case SPINOR_OP_READ:
case SPINOR_OP_READ_FAST:
break;
default:
return -EINVAL;
}
while (len > 0) {
block_size = min_t(size_t, len, INTEL_SPI_FIFO_SZ);
writel(from, ispi->base + FADDR);
val = readl(ispi->base + HSFSTS_CTL);
val &= ~(HSFSTS_CTL_FDBC_MASK | HSFSTS_CTL_FCYCLE_MASK);
val |= HSFSTS_CTL_AEL | HSFSTS_CTL_FCERR | HSFSTS_CTL_FDONE;
val |= (block_size - 1) << HSFSTS_CTL_FDBC_SHIFT;
val |= HSFSTS_CTL_FCYCLE_READ;
val |= HSFSTS_CTL_FGO;
writel(val, ispi->base + HSFSTS_CTL);
ret = intel_spi_wait_hw_busy(ispi);
if (ret)
return ret;
status = readl(ispi->base + HSFSTS_CTL);
if (status & HSFSTS_CTL_FCERR)
ret = -EIO;
else if (status & HSFSTS_CTL_AEL)
ret = -EACCES;
if (ret < 0) {
dev_err(ispi->dev, "read error: %llx: %#x\n", from,
status);
return ret;
}
ret = intel_spi_read_block(ispi, read_buf, block_size);
if (ret)
return ret;
len -= block_size;
from += block_size;
retlen += block_size;
read_buf += block_size;
}
return retlen;
}
static ssize_t intel_spi_write(struct spi_nor *nor, loff_t to, size_t len,
const u_char *write_buf)
{
struct intel_spi *ispi = nor->priv;
size_t block_size, retlen = 0;
u32 val, status;
ssize_t ret;
while (len > 0) {
block_size = min_t(size_t, len, INTEL_SPI_FIFO_SZ);
writel(to, ispi->base + FADDR);
val = readl(ispi->base + HSFSTS_CTL);
val &= ~(HSFSTS_CTL_FDBC_MASK | HSFSTS_CTL_FCYCLE_MASK);
val |= HSFSTS_CTL_AEL | HSFSTS_CTL_FCERR | HSFSTS_CTL_FDONE;
val |= (block_size - 1) << HSFSTS_CTL_FDBC_SHIFT;
val |= HSFSTS_CTL_FCYCLE_WRITE;
/* Write enable */
if (ispi->preopcodes[1] == SPINOR_OP_WREN)
val |= SSFSTS_CTL_SPOP;
val |= SSFSTS_CTL_ACS;
writel(val, ispi->base + HSFSTS_CTL);
ret = intel_spi_write_block(ispi, write_buf, block_size);
if (ret) {
dev_err(ispi->dev, "failed to write block\n");
return ret;
}
/* Start the write now */
val = readl(ispi->base + HSFSTS_CTL);
writel(val | HSFSTS_CTL_FGO, ispi->base + HSFSTS_CTL);
ret = intel_spi_wait_hw_busy(ispi);
if (ret) {
dev_err(ispi->dev, "timeout\n");
return ret;
}
status = readl(ispi->base + HSFSTS_CTL);
if (status & HSFSTS_CTL_FCERR)
ret = -EIO;
else if (status & HSFSTS_CTL_AEL)
ret = -EACCES;
if (ret < 0) {
dev_err(ispi->dev, "write error: %llx: %#x\n", to,
status);
return ret;
}
len -= block_size;
to += block_size;
retlen += block_size;
write_buf += block_size;
}
return retlen;
}
static int intel_spi_erase(struct spi_nor *nor, loff_t offs)
{
size_t erase_size, len = nor->mtd.erasesize;
struct intel_spi *ispi = nor->priv;
u32 val, status, cmd;
int ret;
/* If the hardware can do 64k erase use that when possible */
if (len >= SZ_64K && ispi->erase_64k) {
cmd = HSFSTS_CTL_FCYCLE_ERASE_64K;
erase_size = SZ_64K;
} else {
cmd = HSFSTS_CTL_FCYCLE_ERASE;
erase_size = SZ_4K;
}
while (len > 0) {
writel(offs, ispi->base + FADDR);
val = readl(ispi->base + HSFSTS_CTL);
val &= ~(HSFSTS_CTL_FDBC_MASK | HSFSTS_CTL_FCYCLE_MASK);
val |= HSFSTS_CTL_AEL | HSFSTS_CTL_FCERR | HSFSTS_CTL_FDONE;
val |= cmd;
val |= HSFSTS_CTL_FGO;
writel(val, ispi->base + HSFSTS_CTL);
ret = intel_spi_wait_hw_busy(ispi);
if (ret)
return ret;
status = readl(ispi->base + HSFSTS_CTL);
if (status & HSFSTS_CTL_FCERR)
return -EIO;
else if (status & HSFSTS_CTL_AEL)
return -EACCES;
offs += erase_size;
len -= erase_size;
}
return 0;
}
static bool intel_spi_is_protected(const struct intel_spi *ispi,
unsigned int base, unsigned int limit)
{
int i;
for (i = 0; i < PR_NUM; i++) {
u32 pr_base, pr_limit, pr_value;
pr_value = readl(ispi->pregs + PR(i));
if (!(pr_value & (PR_WPE | PR_RPE)))
continue;
pr_limit = (pr_value & PR_LIMIT_MASK) >> PR_LIMIT_SHIFT;
pr_base = pr_value & PR_BASE_MASK;
if (pr_base >= base && pr_limit <= limit)
return true;
}
return false;
}
/*
* There will be a single partition holding all enabled flash regions. We
* call this "BIOS".
*/
static void intel_spi_fill_partition(struct intel_spi *ispi,
struct mtd_partition *part)
{
u64 end;
int i;
memset(part, 0, sizeof(*part));
/* Start from the mandatory descriptor region */
part->size = 4096;
part->name = "BIOS";
/*
* Now try to find where this partition ends based on the flash
* region registers.
*/
for (i = 1; i < ispi->nregions; i++) {
u32 region, base, limit;
region = readl(ispi->base + FREG(i));
base = region & FREG_BASE_MASK;
limit = (region & FREG_LIMIT_MASK) >> FREG_LIMIT_SHIFT;
if (base >= limit || limit == 0)
continue;
/*
* If any of the regions have protection bits set, make the
* whole partition read-only to be on the safe side.
*/
if (intel_spi_is_protected(ispi, base, limit))
ispi->writeable = 0;
end = (limit << 12) + 4096;
if (end > part->size)
part->size = end;
}
}
struct intel_spi *intel_spi_probe(struct device *dev,
struct resource *mem, const struct intel_spi_boardinfo *info)
{
struct mtd_partition part;
struct intel_spi *ispi;
int ret;
if (!info || !mem)
return ERR_PTR(-EINVAL);
ispi = devm_kzalloc(dev, sizeof(*ispi), GFP_KERNEL);
if (!ispi)
return ERR_PTR(-ENOMEM);
ispi->base = devm_ioremap_resource(dev, mem);
if (IS_ERR(ispi->base))
return ispi->base;
ispi->dev = dev;
ispi->info = info;
ispi->writeable = info->writeable;
ret = intel_spi_init(ispi);
if (ret)
return ERR_PTR(ret);
ispi->nor.dev = ispi->dev;
ispi->nor.priv = ispi;
ispi->nor.read_reg = intel_spi_read_reg;
ispi->nor.write_reg = intel_spi_write_reg;
ispi->nor.read = intel_spi_read;
ispi->nor.write = intel_spi_write;
ispi->nor.erase = intel_spi_erase;
ret = spi_nor_scan(&ispi->nor, NULL, SPI_NOR_NORMAL);
if (ret) {
dev_info(dev, "failed to locate the chip\n");
return ERR_PTR(ret);
}
intel_spi_fill_partition(ispi, &part);
/* Prevent writes if not explicitly enabled */
if (!ispi->writeable || !writeable)
ispi->nor.mtd.flags &= ~MTD_WRITEABLE;
ret = mtd_device_parse_register(&ispi->nor.mtd, NULL, NULL, &part, 1);
if (ret)
return ERR_PTR(ret);
return ispi;
}
EXPORT_SYMBOL_GPL(intel_spi_probe);
int intel_spi_remove(struct intel_spi *ispi)
{
return mtd_device_unregister(&ispi->nor.mtd);
}
EXPORT_SYMBOL_GPL(intel_spi_remove);
MODULE_DESCRIPTION("Intel PCH/PCU SPI flash core driver");
MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
MODULE_LICENSE("GPL v2");

24
drivers/mtd/spi-nor/intel-spi.h Normal file
View File

@ -0,0 +1,24 @@
/*
* Intel PCH/PCU SPI flash driver.
*
* Copyright (C) 2016, Intel Corporation
* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef INTEL_SPI_H
#define INTEL_SPI_H
#include <linux/platform_data/intel-spi.h>
struct intel_spi;
struct resource;
struct intel_spi *intel_spi_probe(struct device *dev,
struct resource *mem, const struct intel_spi_boardinfo *info);
int intel_spi_remove(struct intel_spi *ispi);
#endif /* INTEL_SPI_H */

271
drivers/mtd/spi-nor/spi-nor.c
View File

@ -75,6 +75,16 @@ 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 SPI_NOR_4B_OPCODES BIT(11) /*
* Use dedicated 4byte address op codes
* to support memory size above 128Mib.
*/
};
#define JEDEC_MFR(info) ((info)->id[0])
@ -188,6 +198,78 @@ static inline struct spi_nor *mtd_to_spi_nor(struct mtd_info *mtd)
return mtd->priv;
}
static u8 spi_nor_convert_opcode(u8 opcode, const u8 table[][2], size_t size)
{
size_t i;
for (i = 0; i < size; i++)
if (table[i][0] == opcode)
return table[i][1];
/* No conversion found, keep input op code. */
return opcode;
}
static inline u8 spi_nor_convert_3to4_read(u8 opcode)
{
static const u8 spi_nor_3to4_read[][2] = {
{ SPINOR_OP_READ, SPINOR_OP_READ_4B },
{ SPINOR_OP_READ_FAST, SPINOR_OP_READ_FAST_4B },
{ SPINOR_OP_READ_1_1_2, SPINOR_OP_READ_1_1_2_4B },
{ SPINOR_OP_READ_1_2_2, SPINOR_OP_READ_1_2_2_4B },
{ SPINOR_OP_READ_1_1_4, SPINOR_OP_READ_1_1_4_4B },
{ SPINOR_OP_READ_1_4_4, SPINOR_OP_READ_1_4_4_4B },
};
return spi_nor_convert_opcode(opcode, spi_nor_3to4_read,
ARRAY_SIZE(spi_nor_3to4_read));
}
static inline u8 spi_nor_convert_3to4_program(u8 opcode)
{
static const u8 spi_nor_3to4_program[][2] = {
{ SPINOR_OP_PP, SPINOR_OP_PP_4B },
{ SPINOR_OP_PP_1_1_4, SPINOR_OP_PP_1_1_4_4B },
{ SPINOR_OP_PP_1_4_4, SPINOR_OP_PP_1_4_4_4B },
};
return spi_nor_convert_opcode(opcode, spi_nor_3to4_program,
ARRAY_SIZE(spi_nor_3to4_program));
}
static inline u8 spi_nor_convert_3to4_erase(u8 opcode)
{
static const u8 spi_nor_3to4_erase[][2] = {
{ SPINOR_OP_BE_4K, SPINOR_OP_BE_4K_4B },
{ SPINOR_OP_BE_32K, SPINOR_OP_BE_32K_4B },
{ SPINOR_OP_SE, SPINOR_OP_SE_4B },
};
return spi_nor_convert_opcode(opcode, spi_nor_3to4_erase,
ARRAY_SIZE(spi_nor_3to4_erase));
}
static void spi_nor_set_4byte_opcodes(struct spi_nor *nor,
const struct flash_info *info)
{
/* Do some manufacturer fixups first */
switch (JEDEC_MFR(info)) {
case SNOR_MFR_SPANSION:
/* No small sector erase for 4-byte command set */
nor->erase_opcode = SPINOR_OP_SE;
nor->mtd.erasesize = info->sector_size;
break;
default:
break;
}
nor->read_opcode = spi_nor_convert_3to4_read(nor->read_opcode);
nor->program_opcode = spi_nor_convert_3to4_program(nor->program_opcode);
nor->erase_opcode = spi_nor_convert_3to4_erase(nor->erase_opcode);
}
/* Enable/disable 4-byte addressing mode. */
static inline int set_4byte(struct spi_nor *nor, const struct flash_info *info,
int enable)
@ -217,6 +299,21 @@ 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 +335,11 @@ 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);
if (nor->flags & SNOR_F_READY_XSR_RDY)
sr = s3an_sr_ready(nor);
else
sr = spi_nor_sr_ready(nor);
if (sr < 0)
return sr;
fsr = nor->flags & SNOR_F_USE_FSR ? spi_nor_fsr_ready(nor) : 1;
@ -319,6 +420,27 @@ static void spi_nor_unlock_and_unprep(struct spi_nor *nor, enum spi_nor_ops ops)
mutex_unlock(&nor->lock);
}
/*
* 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.
* Addr can safely be unsigned int, the biggest S3AN device is smaller than
* 4 MiB.
*/
static loff_t spi_nor_s3an_addr_convert(struct spi_nor *nor, unsigned int addr)
{
unsigned int offset;
unsigned int page;
offset = addr % nor->page_size;
page = addr / nor->page_size;
page <<= (nor->page_size > 512) ? 10 : 9;
return page | offset;
}
/*
* Initiate the erasure of a single sector
*/
@ -327,6 +449,9 @@ 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 +493,7 @@ 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 +907,19 @@ 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.
@ -821,7 +959,7 @@ static const struct flash_info spi_nor_ids[] = {
{ "en25s64", INFO(0x1c3817, 0, 64 * 1024, 128, SECT_4K) },
/* ESMT */
{ "f25l32pa", INFO(0x8c2016, 0, 64 * 1024, 64, SECT_4K) },
{ "f25l32pa", INFO(0x8c2016, 0, 64 * 1024, 64, SECT_4K | SPI_NOR_HAS_LOCK) },
/* Everspin */
{ "mr25h256", CAT25_INFO( 32 * 1024, 1, 256, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) },
@ -832,6 +970,11 @@ static const struct flash_info spi_nor_ids[] = {
{ "mb85rs1mt", INFO(0x047f27, 0, 128 * 1024, 1, SPI_NOR_NO_ERASE) },
/* GigaDevice */
{
"gd25q16", INFO(0xc84015, 0, 64 * 1024, 32,
SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
},
{
"gd25q32", INFO(0xc84016, 0, 64 * 1024, 64,
SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
@ -1014,6 +1157,13 @@ 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) },
{ },
};
@ -1054,7 +1204,12 @@ 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;
@ -1175,17 +1330,32 @@ 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);
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);
/*
* If page_size is a power of two, the offset can be quickly
* calculated with an AND operation. On the other cases we
* need to do a modulus operation (more expensive).
* Power of two numbers have only one bit set and we can use
* the instruction hweight32 to detect if we need to do a
* modulus (do_div()) or not.
*/
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);
}
/* the size of data remaining on the first page */
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;
@ -1216,6 +1386,9 @@ static int macronix_quad_enable(struct spi_nor *nor)
val = read_sr(nor);
if (val < 0)
return val;
if (val & SR_QUAD_EN_MX)
return 0;
write_enable(nor);
write_sr(nor, val | SR_QUAD_EN_MX);
@ -1312,6 +1485,47 @@ 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;
/*
* This flashes have a page size of 264 or 528 bytes (known as
* Default addressing mode). It can be changed to a more standard
* Power of two mode where the page size is 256/512. This comes
* with a price: there is 3% less of space, the data is corrupted
* and the page size cannot be changed back to default addressing
* mode.
*
* The current addressing mode can be read from the XRDSR register
* and should not be changed, because is a destructive operation.
*/
if (val & XSR_PAGESIZE) {
/* Flash in Power of 2 mode */
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 {
/* Flash in Default addressing mode */
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;
@ -1359,6 +1573,14 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
mutex_init(&nor->lock);
/*
* Make sure the XSR_RDY flag is set before calling
* spi_nor_wait_till_ready(). Xilinx S3AN share MFR
* with Atmel spi-nor
*/
if (info->flags & SPI_S3AN)
nor->flags |= SNOR_F_READY_XSR_RDY;
/*
* Atmel, SST, Intel/Numonyx, and others serial NOR tend to power up
* with the software protection bits set
@ -1483,27 +1705,10 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
else if (mtd->size > 0x1000000) {
/* enable 4-byte addressing if the device exceeds 16MiB */
nor->addr_width = 4;
if (JEDEC_MFR(info) == SNOR_MFR_SPANSION) {
/* Dedicated 4-byte command set */
switch (nor->flash_read) {
case SPI_NOR_QUAD:
nor->read_opcode = SPINOR_OP_READ4_1_1_4;
break;
case SPI_NOR_DUAL:
nor->read_opcode = SPINOR_OP_READ4_1_1_2;
break;
case SPI_NOR_FAST:
nor->read_opcode = SPINOR_OP_READ4_FAST;
break;
case SPI_NOR_NORMAL:
nor->read_opcode = SPINOR_OP_READ4;
break;
}
nor->program_opcode = SPINOR_OP_PP_4B;
/* No small sector erase for 4-byte command set */
nor->erase_opcode = SPINOR_OP_SE_4B;
mtd->erasesize = info->sector_size;
} else
if (JEDEC_MFR(info) == SNOR_MFR_SPANSION ||
info->flags & SPI_NOR_4B_OPCODES)
spi_nor_set_4byte_opcodes(nor, info);
else
set_4byte(nor, info, 1);
} else {
nor->addr_width = 3;
@ -1517,6 +1722,12 @@ 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);

6
drivers/spi/spi-bcm-qspi.c
View File

@ -371,7 +371,7 @@ static int bcm_qspi_bspi_set_flex_mode(struct bcm_qspi *qspi, int width,
/* default mode, does not need flex_cmd */
flex_mode = 0;
else
command = SPINOR_OP_READ4_FAST;
command = SPINOR_OP_READ_FAST_4B;
break;
case SPI_NBITS_DUAL:
bpc = 0x00000001;
@ -384,7 +384,7 @@ static int bcm_qspi_bspi_set_flex_mode(struct bcm_qspi *qspi, int width,
} else {
command = SPINOR_OP_READ_1_1_2;
if (spans_4byte)
command = SPINOR_OP_READ4_1_1_2;
command = SPINOR_OP_READ_1_1_2_4B;
}
break;
case SPI_NBITS_QUAD:
@ -399,7 +399,7 @@ static int bcm_qspi_bspi_set_flex_mode(struct bcm_qspi *qspi, int width,
} else {
command = SPINOR_OP_READ_1_1_4;
if (spans_4byte)
command = SPINOR_OP_READ4_1_1_4;
command = SPINOR_OP_READ_1_1_4_4B;
}
break;
default:

3
include/linux/mfd/lpc_ich.h
View File

@ -20,6 +20,8 @@
#ifndef LPC_ICH_H
#define LPC_ICH_H
#include <linux/platform_data/intel-spi.h>
/* GPIO resources */
#define ICH_RES_GPIO 0
#define ICH_RES_GPE0 1
@ -40,6 +42,7 @@ struct lpc_ich_info {
char name[32];
unsigned int iTCO_version;
unsigned int gpio_version;
enum intel_spi_type spi_type;
u8 use_gpio;
};

34
include/linux/mtd/spi-nor.h
View File

@ -43,9 +43,13 @@
#define SPINOR_OP_WRSR 0x01 /* Write status register 1 byte */
#define SPINOR_OP_READ 0x03 /* Read data bytes (low frequency) */
#define SPINOR_OP_READ_FAST 0x0b /* Read data bytes (high frequency) */
#define SPINOR_OP_READ_1_1_2 0x3b /* Read data bytes (Dual SPI) */
#define SPINOR_OP_READ_1_1_4 0x6b /* Read data bytes (Quad SPI) */
#define SPINOR_OP_READ_1_1_2 0x3b /* Read data bytes (Dual Output SPI) */
#define SPINOR_OP_READ_1_2_2 0xbb /* Read data bytes (Dual I/O SPI) */
#define SPINOR_OP_READ_1_1_4 0x6b /* Read data bytes (Quad Output SPI) */
#define SPINOR_OP_READ_1_4_4 0xeb /* Read data bytes (Quad I/O SPI) */
#define SPINOR_OP_PP 0x02 /* Page program (up to 256 bytes) */
#define SPINOR_OP_PP_1_1_4 0x32 /* Quad page program */
#define SPINOR_OP_PP_1_4_4 0x38 /* Quad page program */
#define SPINOR_OP_BE_4K 0x20 /* Erase 4KiB block */
#define SPINOR_OP_BE_4K_PMC 0xd7 /* Erase 4KiB block on PMC chips */
#define SPINOR_OP_BE_32K 0x52 /* Erase 32KiB block */
@ -56,11 +60,17 @@
#define SPINOR_OP_RDFSR 0x70 /* Read flag status register */
/* 4-byte address opcodes - used on Spansion and some Macronix flashes. */
#define SPINOR_OP_READ4 0x13 /* Read data bytes (low frequency) */
#define SPINOR_OP_READ4_FAST 0x0c /* Read data bytes (high frequency) */
#define SPINOR_OP_READ4_1_1_2 0x3c /* Read data bytes (Dual SPI) */
#define SPINOR_OP_READ4_1_1_4 0x6c /* Read data bytes (Quad SPI) */
#define SPINOR_OP_READ_4B 0x13 /* Read data bytes (low frequency) */
#define SPINOR_OP_READ_FAST_4B 0x0c /* Read data bytes (high frequency) */
#define SPINOR_OP_READ_1_1_2_4B 0x3c /* Read data bytes (Dual Output SPI) */
#define SPINOR_OP_READ_1_2_2_4B 0xbc /* Read data bytes (Dual I/O SPI) */
#define SPINOR_OP_READ_1_1_4_4B 0x6c /* Read data bytes (Quad Output SPI) */
#define SPINOR_OP_READ_1_4_4_4B 0xec /* Read data bytes (Quad I/O SPI) */
#define SPINOR_OP_PP_4B 0x12 /* Page program (up to 256 bytes) */
#define SPINOR_OP_PP_1_1_4_4B 0x34 /* Quad page program */
#define SPINOR_OP_PP_1_4_4_4B 0x3e /* Quad page program */
#define SPINOR_OP_BE_4K_4B 0x21 /* Erase 4KiB block */
#define SPINOR_OP_BE_32K_4B 0x5c /* Erase 32KiB block */
#define SPINOR_OP_SE_4B 0xdc /* Sector erase (usually 64KiB) */
/* Used for SST flashes only. */
@ -68,6 +78,15 @@
#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 +138,9 @@ 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),
};
/**

31
include/linux/platform_data/intel-spi.h Normal file
View File

@ -0,0 +1,31 @@
/*
* Intel PCH/PCU SPI flash driver.
*
* Copyright (C) 2016, Intel Corporation
* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef INTEL_SPI_PDATA_H
#define INTEL_SPI_PDATA_H
enum intel_spi_type {
INTEL_SPI_BYT = 1,
INTEL_SPI_LPT,
INTEL_SPI_BXT,
};
/**
* struct intel_spi_boardinfo - Board specific data for Intel SPI driver
* @type: Type which this controller is compatible with
* @writeable: The chip is writeable
*/
struct intel_spi_boardinfo {
enum intel_spi_type type;
bool writeable;
};
#endif /* INTEL_SPI_PDATA_H */