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intel/skylake: Implemented generic SPI driver for ROM/RAMSTAGE access. 

Created generic library to implement SPI read, write, erase and
read status functionality for both ROMSTAGE and RAMSTAGE access.

BRANCH=NONE
BUG=chrome-os-partner:42115
TEST=Built for sklrvp and kunimitsu and verify SPI read, write,
erase success from ELOG.

Change-Id: Idf4ffdb550e2a3b87059554e8825a1182b448a8a
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Original-Commit-Id: 74907352931db78802298fe7280a39913a37f0c2
Original-Change-Id: Ib08da1b8825e2e88641acbac3863b926ec48afd9
Original-Signed-off-by: Barnali Sarkar <barnali.sarkar@intel.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/294444
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Tested-by: Subrata Banik <subrata.banik@intel.com>
Original-Commit-Queue: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: http://review.coreboot.org/11422
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Subrata 2015-07-14 16:46:40 +05:30 committed by Patrick Georgi
parent 6cba16f6ef
commit d92f6127e1
3 changed files with 290 additions and 269 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
src/soc/intel/skylake/Makefile.inc
View File

@ -10,6 +10,7 @@ subdirs-y += ../../../cpu/x86/mtrr
subdirs-y += ../../../cpu/x86/smm subdirs-y += ../../../cpu/x86/smm
subdirs-y += ../../../cpu/x86/tsc subdirs-y += ../../../cpu/x86/tsc
romstage-y += flash_controller.c
romstage-y += gpio.c romstage-y += gpio.c
romstage-y += memmap.c romstage-y += memmap.c
romstage-y += pch.c romstage-y += pch.c

382
src/soc/intel/skylake/flash_controller.c
View File

@ -25,210 +25,33 @@
#include <string.h> #include <string.h>
#include <bootstate.h> #include <bootstate.h>
#include <delay.h> #include <delay.h>
#include <arch/io.h>
#include <console/console.h>
#include <device/pci_ids.h> #include <device/pci_ids.h>
#include <flash_controller.h>
#include <spi_flash.h> #include <spi_flash.h>
#include <spi-generic.h> #include <spi-generic.h>
#include <soc/pci_devs.h> #include <soc/pci_devs.h>
#include <soc/spi.h> #include <soc/spi.h>
#define HSFC_FCYCLE_OFF 1 /* 1-2: FLASH Cycle */ #if !(ENV_ROMSTAGE)
#define HSFC_FCYCLE (0x3 << HSFC_FCYCLE_OFF)
#define HSFC_FCYCLE_WR (0x2 << HSFC_FCYCLE_OFF)
#define HSFC_FDBC_OFF 8 /* 8-13: Flash Data Byte Count */
#define HSFC_FDBC (0x3f << HSFC_FDBC_OFF)
#if ENV_SMM
#define pci_read_config_byte(dev, reg, targ)\
(*(targ) = pci_read_config8(dev, reg))
#define pci_read_config_word(dev, reg, targ)\
(*(targ) = pci_read_config16(dev, reg))
#define pci_read_config_dword(dev, reg, targ)\
(*(targ) = pci_read_config32(dev, reg))
#define pci_write_config_byte(dev, reg, val)\
pci_write_config8(dev, reg, val)
#define pci_write_config_word(dev, reg, val)\
pci_write_config16(dev, reg, val)
#define pci_write_config_dword(dev, reg, val)\
pci_write_config32(dev, reg, val)
#else /* !ENV_SMM */
#include <device/device.h>
#include <device/pci.h>
#define pci_read_config_byte(dev, reg, targ)\
(*(targ) = pci_read_config8(dev, reg))
#define pci_read_config_word(dev, reg, targ)\
(*(targ) = pci_read_config16(dev, reg))
#define pci_read_config_dword(dev, reg, targ)\
(*(targ) = pci_read_config32(dev, reg))
#define pci_write_config_byte(dev, reg, val)\
pci_write_config8(dev, reg, val)
#define pci_write_config_word(dev, reg, val)\
pci_write_config16(dev, reg, val)
#define pci_write_config_dword(dev, reg, val)\
pci_write_config32(dev, reg, val)
#endif /* ENV_SMM */
#define B_PCH_SPI_BAR0_MASK 0x0FFF
typedef struct spi_slave pch_spi_slave; typedef struct spi_slave pch_spi_slave;
static struct spi_flash *spi_flash_hwseq_probe(struct spi_slave *spi); static struct spi_flash *spi_flash_hwseq_probe(struct spi_slave *spi);
static int pch_hwseq_write(struct spi_flash *flash, #endif
u32 addr, size_t len, const void *buf);
static int pch_hwseq_read(struct spi_flash *flash,
u32 addr, size_t len, void *buf);
typedef struct pch_spi_regs {
uint32_t bfpr;
uint16_t hsfs;
uint16_t hsfc;
uint32_t faddr;
uint32_t _reserved0;
uint32_t fdata[16];
uint32_t frap;
uint32_t freg[6];
uint32_t _reserved1[6];
uint32_t pr[5];
uint32_t _reserved2[2];
uint8_t ssfs;
uint8_t ssfc[3];
uint16_t preop;
uint16_t optype;
uint8_t opmenu[8];
uint32_t bbar;
uint32_t fdoc;
uint32_t fdod;
uint8_t _reserved4[8];
uint32_t afc;
uint32_t lvscc;
uint32_t uvscc;
uint8_t _reserved5[4];
uint32_t fpb;
uint8_t _reserved6[28];
uint32_t srdl;
uint32_t srdc;
uint32_t srd;
} __attribute__((packed)) pch_spi_regs;
typedef struct pch_spi_controller {
int locked;
uint32_t flmap0;
uint32_t hsfs;
pch_spi_regs *pch_spi;
uint8_t *opmenu;
int menubytes;
uint16_t *preop;
uint16_t *optype;
uint32_t *addr;
uint8_t *data;
unsigned databytes;
uint8_t *status;
uint16_t *control;
uint32_t *bbar;
} pch_spi_controller;
static pch_spi_controller cntlr;
enum {
HSFS_FDONE = 0x0001,
HSFS_FCERR = 0x0002,
HSFS_AEL = 0x0004,
HSFS_BERASE_MASK = 0x0018,
HSFS_BERASE_SHIFT = 3,
HSFS_SCIP = 0x0020,
HSFS_FDOPSS = 0x2000,
HSFS_FDV = 0x4000,
HSFS_FLOCKDN = 0x8000
};
enum {
HSFC_FGO = 0x0001,
HSFC_FCYCLE_MASK = 0x0006,
HSFC_FCYCLE_SHIFT = 1,
HSFC_FDBC_MASK = 0x3f00,
HSFC_FDBC_SHIFT = 8,
HSFC_FSMIE = 0x8000
};
#if IS_ENABLED(CONFIG_DEBUG_SPI_FLASH)
static u8 readb_(const void *addr)
{
u8 v = read8(addr);
printk(BIOS_DEBUG, "read %2.2x from %4.4x\n",
v, ((unsigned) addr & 0xffff) - 0xf020);
return v;
}
static u16 readw_(const void *addr)
{
u16 v = read16(addr);
printk(BIOS_DEBUG, "read %4.4x from %4.4x\n",
v, ((unsigned) addr & 0xffff) - 0xf020);
return v;
}
static u32 readl_(const void *addr)
{
u32 v = read32(addr);
printk(BIOS_DEBUG, "read %8.8x from %4.4x\n",
v, ((unsigned) addr & 0xffff) - 0xf020);
return v;
}
static void writeb_(u8 b, void *addr)
{
write8(addr, b);
printk(BIOS_DEBUG, "wrote %2.2x to %4.4x\n",
b, ((unsigned) addr & 0xffff) - 0xf020);
}
static void writew_(u16 b, void *addr)
{
write16(addr, b);
printk(BIOS_DEBUG, "wrote %4.4x to %4.4x\n",
b, ((unsigned) addr & 0xffff) - 0xf020);
}
static void writel_(u32 b, void *addr)
{
write32(addr, b);
printk(BIOS_DEBUG, "wrote %8.8x to %4.4x\n",
b, ((unsigned) addr & 0xffff) - 0xf020);
}
#else /* CONFIG_DEBUG_SPI_FLASH ^^^ enabled vvv NOT enabled */
#define readb_(a) read8(a)
#define readw_(a) read16(a)
#define readl_(a) read32(a)
#define writeb_(val, addr) write8(addr, val)
#define writew_(val, addr) write16(addr, val)
#define writel_(val, addr) write32(addr, val)
#endif /* CONFIG_DEBUG_SPI_FLASH ^^^ NOT enabled */
static void pch_set_bbar(uint32_t minaddr)
{
uint32_t pchspi_bbar;
minaddr &= SPIBAR_MEMBAR_MASK;
pchspi_bbar = readl_(cntlr.bbar) & ~SPIBAR_MEMBAR_MASK;
pchspi_bbar |= minaddr;
writel_(pchspi_bbar, cntlr.bbar);
}
unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len) unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len)
{ {
return min(cntlr.databytes, buf_len); pch_spi_regs *spi_bar;
spi_bar = get_spi_bar();
return min(sizeof(spi_bar->fdata), buf_len);
} }
#if !(ENV_ROMSTAGE)
struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs) struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs)
{ {
pch_spi_slave *slave = malloc(sizeof(*slave)); pch_spi_slave *slave = malloc(sizeof(*slave));
if (!slave) { if (!slave) {
printk(BIOS_DEBUG, "ICH SPI: Bad allocation\n"); printk(BIOS_DEBUG, "PCH SPI: Bad allocation\n");
return NULL; return NULL;
} }
@ -241,14 +64,15 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs)
return slave; return slave;
} }
#endif
static u32 spi_get_flash_size(void) static u32 spi_get_flash_size(pch_spi_regs *spi_bar)
{ {
uint32_t flcomp; uint32_t flcomp;
u32 size; u32 size;
writel_(SPIBAR_FDOC_COMPONENT, &cntlr.pch_spi->fdoc); writel_(SPIBAR_FDOC_COMPONENT, &spi_bar->fdoc);
flcomp = readl_(&cntlr.pch_spi->fdod); flcomp = readl_(&spi_bar->fdod);
printk(BIOS_DEBUG, "flcomp = %x\n", flcomp); printk(BIOS_DEBUG, "flcomp = %x\n", flcomp);
switch (flcomp & FLCOMP_C0DEN_MASK) { switch (flcomp & FLCOMP_C0DEN_MASK) {
@ -281,33 +105,17 @@ void spi_init(void)
{ {
uint8_t bios_cntl; uint8_t bios_cntl;
device_t dev = PCH_DEV_SPI; device_t dev = PCH_DEV_SPI;
pch_spi_regs *pch_spi; pch_spi_regs *spi_bar;
uint16_t hsfs; uint16_t hsfs;
/* Root Complex Register Block */ /* Root Complex Register Block */
pch_spi = (pch_spi_regs *)(get_spi_bar()); spi_bar = get_spi_bar();
cntlr.pch_spi = pch_spi; hsfs = readw_(&spi_bar->hsfs);
hsfs = readw_(&pch_spi->hsfs); if (hsfs & HSFS_FDV) {
cntlr.hsfs = hsfs;
cntlr.opmenu = pch_spi->opmenu;
cntlr.menubytes = sizeof(pch_spi->opmenu);
cntlr.optype = &pch_spi->optype;
cntlr.addr = &pch_spi->faddr;
cntlr.data = (uint8_t *)pch_spi->fdata;
cntlr.databytes = sizeof(pch_spi->fdata);
cntlr.status = &pch_spi->ssfs;
cntlr.control = (uint16_t *)pch_spi->ssfc;
cntlr.bbar = &pch_spi->bbar;
cntlr.preop = &pch_spi->preop;
if (cntlr.hsfs & HSFS_FDV) {
/* Select Flash Descriptor Section Index to 1 */ /* Select Flash Descriptor Section Index to 1 */
writel_(SPIBAR_FDOC_FDSI_1, &pch_spi->fdoc); writel_(SPIBAR_FDOC_FDSI_1, &spi_bar->fdoc);
cntlr.flmap0 = readl_(&pch_spi->fdod);
} }
pch_set_bbar(0);
/* Disable the BIOS write protect so write commands are allowed. */ /* Disable the BIOS write protect so write commands are allowed. */
pci_read_config_byte(dev, SPIBAR_BIOS_CNTL, &bios_cntl); pci_read_config_byte(dev, SPIBAR_BIOS_CNTL, &bios_cntl);
bios_cntl &= ~SPIBAR_BC_EISS; bios_cntl &= ~SPIBAR_BC_EISS;
@ -315,17 +123,6 @@ void spi_init(void)
pci_write_config_byte(dev, SPIBAR_BIOS_CNTL, bios_cntl); pci_write_config_byte(dev, SPIBAR_BIOS_CNTL, bios_cntl);
} }
#if ENV_RAMSTAGE
static void spi_init_cb(void *unused)
{
spi_init();
}
BOOT_STATE_INIT_ENTRY(BS_DEV_INIT, BS_ON_ENTRY, spi_init_cb, NULL);
#endif /* ENV_RAMSTAGE */
int spi_claim_bus(struct spi_slave *slave) int spi_claim_bus(struct spi_slave *slave)
{ {
/* Handled by PCH automatically. */ /* Handled by PCH automatically. */
@ -337,10 +134,10 @@ void spi_release_bus(struct spi_slave *slave)
/* Handled by PCH automatically. */ /* Handled by PCH automatically. */
} }
static void pch_hwseq_set_addr(uint32_t addr) static void pch_hwseq_set_addr(uint32_t addr, pch_spi_regs *spi_bar)
{ {
uint32_t addr_old = readl_(&cntlr.pch_spi->faddr) & ~SPIBAR_FADDR_MASK; uint32_t addr_old = readl_(&spi_bar->faddr) & ~SPIBAR_FADDR_MASK;
writel_((addr & SPIBAR_FADDR_MASK) | addr_old, &cntlr.pch_spi->faddr); writel_((addr & SPIBAR_FADDR_MASK) | addr_old, &spi_bar->faddr);
} }
/* /*
@ -350,22 +147,22 @@ static void pch_hwseq_set_addr(uint32_t addr)
* timeout us, 1 on errors. * timeout us, 1 on errors.
*/ */
static int pch_hwseq_wait_for_cycle_complete(unsigned int timeout, static int pch_hwseq_wait_for_cycle_complete(unsigned int timeout,
unsigned int len) unsigned int len, pch_spi_regs *spi_bar)
{ {
uint16_t hsfs; uint16_t hsfs;
uint32_t addr; uint32_t addr;
timeout /= 8; /* scale timeout duration to counter */ timeout /= 8; /* scale timeout duration to counter */
while ((((hsfs = readw_(&cntlr.pch_spi->hsfs)) & while ((((hsfs = readw_(&spi_bar->hsfs)) &
(HSFS_FDONE | HSFS_FCERR)) == 0) && --timeout) { (HSFS_FDONE | HSFS_FCERR)) == 0) && --timeout) {
udelay(8); udelay(8);
} }
writew_(readw_(&cntlr.pch_spi->hsfs), &cntlr.pch_spi->hsfs); writew_(readw_(&spi_bar->hsfs), &spi_bar->hsfs);
if (!timeout) { if (!timeout) {
uint16_t hsfc; uint16_t hsfc;
addr = readl_(&cntlr.pch_spi->faddr) & SPIBAR_FADDR_MASK; addr = readl_(&spi_bar->faddr) & SPIBAR_FADDR_MASK;
hsfc = readw_(&cntlr.pch_spi->hsfc); hsfc = readw_(&spi_bar->hsfc);
printk(BIOS_ERR, "Transaction timeout between offset 0x%08x \ printk(BIOS_ERR, "Transaction timeout between offset 0x%08x \
and 0x%08x (= 0x%08x + %d) HSFC=%x HSFS=%x!\n", and 0x%08x (= 0x%08x + %d) HSFC=%x HSFS=%x!\n",
addr, addr + len - 1, addr, len - 1, addr, addr + len - 1, addr, len - 1,
@ -375,8 +172,8 @@ static int pch_hwseq_wait_for_cycle_complete(unsigned int timeout,
if (hsfs & HSFS_FCERR) { if (hsfs & HSFS_FCERR) {
uint16_t hsfc; uint16_t hsfc;
addr = readl_(&cntlr.pch_spi->faddr) & SPIBAR_FADDR_MASK; addr = readl_(&spi_bar->faddr) & SPIBAR_FADDR_MASK;
hsfc = readw_(&cntlr.pch_spi->hsfc); hsfc = readw_(&spi_bar->hsfc);
printk(BIOS_ERR, "Transaction error between offset 0x%08x and \ printk(BIOS_ERR, "Transaction error between offset 0x%08x and \
0x%08x (= 0x%08x + %d) HSFC=%x HSFS=%x!\n", 0x%08x (= 0x%08x + %d) HSFC=%x HSFS=%x!\n",
addr, addr + len - 1, addr, len - 1, addr, addr + len - 1, addr, len - 1,
@ -386,14 +183,15 @@ static int pch_hwseq_wait_for_cycle_complete(unsigned int timeout,
return 0; return 0;
} }
int pch_hwseq_erase(struct spi_flash *flash, u32 offset, size_t len)
static int pch_hwseq_erase(struct spi_flash *flash, u32 offset, size_t len)
{ {
u32 start, end, erase_size; u32 start, end, erase_size;
int ret; int ret;
uint16_t hsfc; uint16_t hsfc;
uint16_t timeout = 1000 * 60; uint32_t timeout = 5000 * 1000; /* 5 s for max 64 kB */
pch_spi_regs *spi_bar;
spi_bar = get_spi_bar();
erase_size = flash->sector_size; erase_size = flash->sector_size;
if (offset % erase_size || len % erase_size) { if (offset % erase_size || len % erase_size) {
printk(BIOS_ERR, "SF: Erase offset/length not multiple of erase size\n"); printk(BIOS_ERR, "SF: Erase offset/length not multiple of erase size\n");
@ -415,18 +213,18 @@ static int pch_hwseq_erase(struct spi_flash *flash, u32 offset, size_t len)
* Make sure FDONE, FCERR, AEL are * Make sure FDONE, FCERR, AEL are
* cleared by writing 1 to them. * cleared by writing 1 to them.
*/ */
writew_(readw_(&cntlr.pch_spi->hsfs), &cntlr.pch_spi->hsfs); writew_(readw_(&spi_bar->hsfs), &spi_bar->hsfs);
pch_hwseq_set_addr(offset); pch_hwseq_set_addr(offset, spi_bar);
offset += erase_size; offset += erase_size;
hsfc = readw_(&cntlr.pch_spi->hsfc); hsfc = readw_(&spi_bar->hsfc);
hsfc &= ~HSFC_FCYCLE; /* clear operation */ hsfc &= ~HSFC_FCYCLE; /* clear operation */
hsfc |= HSFC_FCYCLE; /* set erase operation */ hsfc |= HSFC_FCYCLE; /* set erase operation */
hsfc |= HSFC_FGO; /* start */ hsfc |= HSFC_FGO; /* start */
writew_(hsfc, &cntlr.pch_spi->hsfc); writew_(hsfc, &spi_bar->hsfc);
if (pch_hwseq_wait_for_cycle_complete(timeout, len)) { if (pch_hwseq_wait_for_cycle_complete(timeout, len, spi_bar)) {
printk(BIOS_ERR, "SF: Erase failed at %x\n", printk(BIOS_ERR, "SF: Erase failed at %x\n",
offset - erase_size); offset - erase_size);
ret = -1; ret = -1;
@ -442,27 +240,28 @@ out:
return ret; return ret;
} }
static void pch_read_data(uint8_t *data, int len) static void pch_read_data(uint8_t *data, int len, pch_spi_regs *spi_bar)
{ {
int i; int i;
uint32_t temp32 = 0; uint32_t temp32 = 0;
for (i = 0; i < len; i++) { for (i = 0; i < len; i++) {
if ((i % 4) == 0) if ((i % 4) == 0)
temp32 = readl_(cntlr.data + i); temp32 = readl_((uint8_t *)spi_bar->fdata + i);
data[i] = (temp32 >> ((i % 4) * 8)) & 0xff; data[i] = (temp32 >> ((i % 4) * 8)) & 0xff;
} }
} }
int pch_hwseq_read(struct spi_flash *flash,
static int pch_hwseq_read(struct spi_flash *flash,
u32 addr, size_t len, void *buf) u32 addr, size_t len, void *buf)
{ {
uint16_t hsfc; uint16_t hsfc;
uint16_t timeout = 100 * 60; uint16_t timeout = 100 * 60; /* 6 mili secs timeout */
uint8_t block_len; uint8_t block_len;
pch_spi_regs *spi_bar;
if (addr + len > spi_get_flash_size()) { spi_bar = get_spi_bar();
if (addr + len > spi_get_flash_size(spi_bar)) {
printk(BIOS_ERR, printk(BIOS_ERR,
"Attempt to read %x-%x which is out of chip\n", "Attempt to read %x-%x which is out of chip\n",
(unsigned) addr, (unsigned) addr,
@ -471,24 +270,25 @@ static int pch_hwseq_read(struct spi_flash *flash,
} }
/* clear FDONE, FCERR, AEL by writing 1 to them (if they are set) */ /* clear FDONE, FCERR, AEL by writing 1 to them (if they are set) */
writew_(readw_(&cntlr.pch_spi->hsfs), &cntlr.pch_spi->hsfs); writew_(readw_(&spi_bar->hsfs), &spi_bar->hsfs);
while (len > 0) { while (len > 0) {
block_len = min(len, cntlr.databytes); block_len = min(len, sizeof(spi_bar->fdata));
if (block_len > (~addr & 0xff)) if (block_len > (~addr & 0xff))
block_len = (~addr & 0xff) + 1; block_len = (~addr & 0xff) + 1;
pch_hwseq_set_addr(addr); pch_hwseq_set_addr(addr, spi_bar);
hsfc = readw_(&cntlr.pch_spi->hsfc); hsfc = readw_(&spi_bar->hsfc);
hsfc &= ~HSFC_FCYCLE; /* set read operation */ hsfc &= ~HSFC_FCYCLE; /* set read operation */
hsfc &= ~HSFC_FDBC; /* clear byte count */ hsfc &= ~HSFC_FDBC; /* clear byte count */
/* set byte count */ /* set byte count */
hsfc |= (((block_len - 1) << HSFC_FDBC_OFF) & HSFC_FDBC); hsfc |= (((block_len - 1) << HSFC_FDBC_SHIFT) & HSFC_FDBC);
hsfc |= HSFC_FGO; /* start */ hsfc |= HSFC_FGO; /* start */
writew_(hsfc, &cntlr.pch_spi->hsfc); writew_(hsfc, &spi_bar->hsfc);
if (pch_hwseq_wait_for_cycle_complete(timeout, block_len)) if (pch_hwseq_wait_for_cycle_complete
return 1; (timeout, block_len, spi_bar))
pch_read_data(buf, block_len); return -1;
pch_read_data(buf, block_len, spi_bar);
addr += block_len; addr += block_len;
buf += block_len; buf += block_len;
len -= block_len; len -= block_len;
@ -505,7 +305,9 @@ static void pch_fill_data(const uint8_t *data, int len)
{ {
uint32_t temp32 = 0; uint32_t temp32 = 0;
int i; int i;
pch_spi_regs *spi_bar;
spi_bar = get_spi_bar();
if (len <= 0) if (len <= 0)
return; return;
@ -516,22 +318,26 @@ static void pch_fill_data(const uint8_t *data, int len)
temp32 |= ((uint32_t) data[i]) << ((i % 4) * 8); temp32 |= ((uint32_t) data[i]) << ((i % 4) * 8);
if ((i % 4) == 3) /* 32 bits are full, write them to regs. */ if ((i % 4) == 3) /* 32 bits are full, write them to regs. */
writel_(temp32, cntlr.data + (i - (i % 4))); writel_(temp32,
(uint8_t *)spi_bar->fdata + (i - (i % 4)));
} }
i--; i--;
if ((i % 4) != 3) /* Write remaining data to regs. */ if ((i % 4) != 3) /* Write remaining data to regs. */
writel_(temp32, cntlr.data + (i - (i % 4))); writel_(temp32, (uint8_t *)spi_bar->fdata + (i - (i % 4)));
} }
static int pch_hwseq_write(struct spi_flash *flash, int pch_hwseq_write(struct spi_flash *flash,
u32 addr, size_t len, const void *buf) u32 addr, size_t len, const void *buf)
{ {
uint16_t hsfc; uint16_t hsfc;
uint16_t timeout = 100 * 60; uint16_t timeout = 100 * 60; /* 6 mili secs timeout */
uint8_t block_len; uint8_t block_len;
uint32_t start = addr; uint32_t start = addr;
pch_spi_regs *spi_bar;
if (addr + len > spi_get_flash_size()) { spi_bar = get_spi_bar();
if (addr + len > spi_get_flash_size(spi_bar)) {
printk(BIOS_ERR, printk(BIOS_ERR,
"Attempt to write 0x%x-0x%x which is out of chip\n", "Attempt to write 0x%x-0x%x which is out of chip\n",
(unsigned)addr, (unsigned) (addr+len)); (unsigned)addr, (unsigned) (addr+len));
@ -539,26 +345,27 @@ static int pch_hwseq_write(struct spi_flash *flash,
} }
/* clear FDONE, FCERR, AEL by writing 1 to them (if they are set) */ /* clear FDONE, FCERR, AEL by writing 1 to them (if they are set) */
writew_(readw_(&cntlr.pch_spi->hsfs), &cntlr.pch_spi->hsfs); writew_(readw_(&spi_bar->hsfs), &spi_bar->hsfs);
while (len > 0) { while (len > 0) {
block_len = min(len, cntlr.databytes); block_len = min(len, sizeof(spi_bar->fdata));
if (block_len > (~addr & 0xff)) if (block_len > (~addr & 0xff))
block_len = (~addr & 0xff) + 1; block_len = (~addr & 0xff) + 1;
pch_hwseq_set_addr(addr); pch_hwseq_set_addr(addr, spi_bar);
pch_fill_data(buf, block_len); pch_fill_data(buf, block_len);
hsfc = readw_(&cntlr.pch_spi->hsfc); hsfc = readw_(&spi_bar->hsfc);
hsfc &= ~HSFC_FCYCLE; /* clear operation */ hsfc &= ~HSFC_FCYCLE; /* clear operation */
hsfc |= HSFC_FCYCLE_WR; /* set write operation */ hsfc |= HSFC_FCYCLE_WR; /* set write operation */
hsfc &= ~HSFC_FDBC; /* clear byte count */ hsfc &= ~HSFC_FDBC; /* clear byte count */
/* set byte count */ /* set byte count */
hsfc |= (((block_len - 1) << HSFC_FDBC_OFF) & HSFC_FDBC); hsfc |= (((block_len - 1) << HSFC_FDBC_SHIFT) & HSFC_FDBC);
hsfc |= HSFC_FGO; /* start */ hsfc |= HSFC_FGO; /* start */
writew_(hsfc, &cntlr.pch_spi->hsfc); writew_(hsfc, &spi_bar->hsfc);
if (pch_hwseq_wait_for_cycle_complete(timeout, block_len)) { if (pch_hwseq_wait_for_cycle_complete
(timeout, block_len, spi_bar)) {
printk(BIOS_ERR, "SF: write failure at %x\n", addr); printk(BIOS_ERR, "SF: write failure at %x\n", addr);
return -1; return -1;
} }
@ -571,12 +378,46 @@ static int pch_hwseq_write(struct spi_flash *flash,
return 0; return 0;
} }
int pch_hwseq_read_status(struct spi_flash *flash, u8 *reg)
{
uint16_t hsfc;
uint16_t timeout = 100 * 60; /* 6 mili secs timeout */
uint8_t block_len = SPI_READ_STATUS_LENGTH;
pch_spi_regs *spi_bar;
spi_bar = get_spi_bar();
/* clear FDONE, FCERR, AEL by writing 1 to them (if they are set) */
writew_(readw_(&spi_bar->hsfs), &spi_bar->hsfs);
hsfc = readw_(&spi_bar->hsfc);
hsfc &= ~HSFC_FCYCLE; /* set read operation */
/* read status register */
hsfc |= HSFC_FCYCLE_RS;
hsfc &= ~HSFC_FDBC; /* clear byte count */
/* set byte count */
hsfc |= (((block_len - 1) << HSFC_FDBC_SHIFT) & HSFC_FDBC);
hsfc |= HSFC_FGO; /* start */
writew_(hsfc, &spi_bar->hsfc);
if (pch_hwseq_wait_for_cycle_complete(timeout,
block_len, spi_bar))
return -1;
pch_read_data(reg, block_len, spi_bar);
/* clear read status register */
writew_(readw_(&spi_bar->hsfc) &
~HSFC_FCYCLE_RS, &spi_bar->hsfc);
return 0;
}
#if !(ENV_ROMSTAGE)
static struct spi_flash *spi_flash_hwseq_probe(struct spi_slave *spi) static struct spi_flash *spi_flash_hwseq_probe(struct spi_slave *spi)
{ {
struct spi_flash *flash = NULL; struct spi_flash *flash = NULL;
u32 berase; u32 berase;
pch_spi_regs *spi_bar;
spi_bar = get_spi_bar();
flash = malloc(sizeof(*flash)); flash = malloc(sizeof(*flash));
if (!flash) { if (!flash) {
printk(BIOS_WARNING, "SF: Failed to allocate memory\n"); printk(BIOS_WARNING, "SF: Failed to allocate memory\n");
@ -589,9 +430,10 @@ static struct spi_flash *spi_flash_hwseq_probe(struct spi_slave *spi)
flash->write = pch_hwseq_write; flash->write = pch_hwseq_write;
flash->erase = pch_hwseq_erase; flash->erase = pch_hwseq_erase;
flash->read = pch_hwseq_read; flash->read = pch_hwseq_read;
pch_hwseq_set_addr(0); flash->status = pch_hwseq_read_status;
pch_hwseq_set_addr(0, spi_bar);
berase = (cntlr.hsfs >> SPIBAR_HSFS_BERASE_OFFSET) & berase = ((readw_(&spi_bar->hsfs)) >> SPIBAR_HSFS_BERASE_OFFSET) &
SPIBAR_HSFS_BERASE_MASK; SPIBAR_HSFS_BERASE_MASK;
switch (berase) { switch (berase) {
@ -609,7 +451,9 @@ static struct spi_flash *spi_flash_hwseq_probe(struct spi_slave *spi)
break; break;
} }
flash->size = spi_get_flash_size(); flash->size = spi_get_flash_size(spi_bar);
return flash; return flash;
} }
#endif

176
src/soc/intel/skylake/include/flash_controller.h Normal file
View File

@ -0,0 +1,176 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2015 Intel 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; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.,
*/
#ifndef _FLASH_CONTROLLER__H_
#define _FLASH_CONTROLLER__H_
#include <rules.h>
#include <arch/io.h>
#include <console/console.h>
#include <spi_flash.h>
int pch_hwseq_erase(struct spi_flash *flash, u32 offset, size_t len);
int pch_hwseq_write(struct spi_flash *flash,
u32 addr, size_t len, const void *buf);
int pch_hwseq_read(struct spi_flash *flash,
u32 addr, size_t len, void *buf);
int pch_hwseq_read_status(struct spi_flash *flash, u8 *reg);
#if IS_ENABLED(CONFIG_DEBUG_SPI_FLASH)
static u8 readb_(const void *addr)
{
u8 v = read8(addr);
printk(BIOS_DEBUG, "read %2.2x from %4.4x\n",
v, ((unsigned) addr & 0xffff) - 0xf020);
return v;
}
static u16 readw_(const void *addr)
{
u16 v = read16(addr);
printk(BIOS_DEBUG, "read %4.4x from %4.4x\n",
v, ((unsigned) addr & 0xffff) - 0xf020);
return v;
}
static u32 readl_(const void *addr)
{
u32 v = read32(addr);
printk(BIOS_DEBUG, "read %8.8x from %4.4x\n",
v, ((unsigned) addr & 0xffff) - 0xf020);
return v;
}
static void writeb_(u8 b, void *addr)
{
write8(addr, b);
printk(BIOS_DEBUG, "wrote %2.2x to %4.4x\n",
b, ((unsigned) addr & 0xffff) - 0xf020);
}
static void writew_(u16 b, void *addr)
{
write16(addr, b);
printk(BIOS_DEBUG, "wrote %4.4x to %4.4x\n",
b, ((unsigned) addr & 0xffff) - 0xf020);
}
static void writel_(u32 b, void *addr)
{
write32(addr, b);
printk(BIOS_DEBUG, "wrote %8.8x to %4.4x\n",
b, ((unsigned) addr & 0xffff) - 0xf020);
}
#else /* CONFIG_DEBUG_SPI_FLASH ^^^ enabled vvv NOT enabled */
#define readb_(a) read8(a)
#define readw_(a) read16(a)
#define readl_(a) read32(a)
#define writeb_(val, addr) write8(addr, val)
#define writew_(val, addr) write16(addr, val)
#define writel_(val, addr) write32(addr, val)
#endif /* CONFIG_DEBUG_SPI_FLASH ^^^ NOT enabled */
#if ENV_SMM
#define pci_read_config_byte(dev, reg, targ)\
(*(targ) = pci_read_config8(dev, reg))
#define pci_read_config_word(dev, reg, targ)\
(*(targ) = pci_read_config16(dev, reg))
#define pci_read_config_dword(dev, reg, targ)\
(*(targ) = pci_read_config32(dev, reg))
#define pci_write_config_byte(dev, reg, val)\
pci_write_config8(dev, reg, val)
#define pci_write_config_word(dev, reg, val)\
pci_write_config16(dev, reg, val)
#define pci_write_config_dword(dev, reg, val)\
pci_write_config32(dev, reg, val)
#else /* !ENV_SMM */
#include <device/device.h>
#include <device/pci.h>
#define pci_read_config_byte(dev, reg, targ)\
(*(targ) = pci_read_config8(dev, reg))
#define pci_read_config_word(dev, reg, targ)\
(*(targ) = pci_read_config16(dev, reg))
#define pci_read_config_dword(dev, reg, targ)\
(*(targ) = pci_read_config32(dev, reg))
#define pci_write_config_byte(dev, reg, val)\
pci_write_config8(dev, reg, val)
#define pci_write_config_word(dev, reg, val)\
pci_write_config16(dev, reg, val)
#define pci_write_config_dword(dev, reg, val)\
pci_write_config32(dev, reg, val)
#endif /* ENV_SMM */
#define HSFC_FCYCLE (0x3 << HSFC_FCYCLE_SHIFT)
#define HSFC_FCYCLE_WR (0x2 << HSFC_FCYCLE_SHIFT)
#define HSFC_FCYCLE_RS (0x8 << HSFC_FCYCLE_SHIFT)
#define HSFC_FDBC (0x3f << HSFC_FDBC_SHIFT)
#define SPI_READ_STATUS_LENGTH 1 /* Read Status Register 1 */
#define WPSR_MASK_SRP0_BIT 0x80
typedef struct pch_spi_regs {
uint32_t bfpr;
uint16_t hsfs;
uint16_t hsfc;
uint32_t faddr;
uint32_t _reserved0;
uint32_t fdata[16];
uint32_t frap;
uint32_t freg[6];
uint32_t _reserved1[6];
uint32_t pr[5];
uint32_t gpr0;
uint32_t _reserved2;
uint32_t _reserved3;
uint16_t preop;
uint16_t optype;
uint8_t opmenu[8];
uint32_t bbar;
uint32_t fdoc;
uint32_t fdod;
uint8_t _reserved4[8];
uint32_t afc;
uint32_t lvscc;
uint32_t uvscc;
uint8_t _reserved5[4];
uint32_t fpb;
uint8_t _reserved6[28];
uint32_t srdl;
uint32_t srdc;
uint32_t srd;
} __attribute__((packed)) pch_spi_regs;
enum {
HSFS_FDONE = 0x0001,
HSFS_FCERR = 0x0002,
HSFS_FDV = 0x4000,
};
enum {
HSFC_FGO = 0x0001,
HSFC_FCYCLE_SHIFT = 1,
HSFC_FDBC_SHIFT = 8,
};
#endif /* _FLASH_CONTROLLER__H_ */