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Diffstat (limited to 'src/southbridge/intel/bd82x6x/spi.c')
-rw-r--r--src/southbridge/intel/bd82x6x/spi.c323
1 files changed, 322 insertions, 1 deletions
diff --git a/src/southbridge/intel/bd82x6x/spi.c b/src/southbridge/intel/bd82x6x/spi.c
index ec5d7de33e..1f2511e4b0 100644
--- a/src/southbridge/intel/bd82x6x/spi.c
+++ b/src/southbridge/intel/bd82x6x/spi.c
@@ -1,5 +1,7 @@
/*
* Copyright (c) 2011 The Chromium OS Authors.
+ * Copyright (C) 2009, 2010 Carl-Daniel Hailfinger
+ * Copyright (C) 2011 Stefan Tauner
*
* See file CREDITS for list of people who contributed to this
* project.
@@ -28,11 +30,20 @@
#include <arch/io.h>
#include <console/console.h>
#include <device/pci_ids.h>
+#include <device/pci.h>
+#include <spi_flash.h>
#include <spi-generic.h>
+#include "pch.h"
#define min(a, b) ((a)<(b)?(a):(b))
+#define HSFC_FCYCLE_OFF 1 /* 1-2: FLASH Cycle */
+#define HSFC_FCYCLE (0x3 << HSFC_FCYCLE_OFF)
+#define HSFC_FDBC_OFF 8 /* 8-13: Flash Data Byte Count */
+#define HSFC_FDBC (0x3f << HSFC_FDBC_OFF)
+
+
#ifdef __SMM__
#include <arch/pci_mmio_cfg.h>
#define pci_read_config_byte(dev, reg, targ)\
@@ -64,6 +75,9 @@
pci_write_config32(dev, reg, val)
#endif /* !__SMM__ */
+static int spi_is_multichip(void);
+static struct spi_flash *spi_flash_hwseq(struct spi_slave *spi);
+
typedef struct spi_slave ich_spi_slave;
static int ichspi_lock = 0;
@@ -115,7 +129,11 @@ typedef struct ich9_spi_regs {
typedef struct ich_spi_controller {
int locked;
+ int revision;
+ uint32_t flmap0;
+ uint32_t hsfs;
+ ich9_spi_regs *ich9_spi;
uint8_t *opmenu;
int menubytes;
uint16_t *preop;
@@ -299,6 +317,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
slave->bus = bus;
slave->cs = cs;
+ if (cntlr.revision == 9) {
+ slave->force_programmer_specific = spi_is_multichip ();
+ slave->programmer_specific_probe = spi_flash_hwseq;
+ }
return slave;
}
@@ -356,6 +378,7 @@ void spi_init(void)
pci_read_config_dword(dev, 0xf0, &rcba);
/* Bits 31-14 are the base address, 13-1 are reserved, 0 is enable. */
rcrb = (uint8_t *)(rcba & 0xffffc000);
+ cntlr.revision = ich_version;
switch (ich_version) {
case 7:
{
@@ -381,7 +404,11 @@ void spi_init(void)
const uint16_t ich9_spibar_offset = 0x3800;
ich9_spi_regs *ich9_spi =
(ich9_spi_regs *)(rcrb + ich9_spibar_offset);
- ichspi_lock = readw_(&ich9_spi->hsfs) & HSFS_FLOCKDN;
+ uint16_t hsfs;
+ cntlr.ich9_spi = ich9_spi;
+ hsfs = readw_(&ich9_spi->hsfs);
+ ichspi_lock = hsfs & HSFS_FLOCKDN;
+ cntlr.hsfs = hsfs;
cntlr.opmenu = ich9_spi->opmenu;
cntlr.menubytes = sizeof(ich9_spi->opmenu);
cntlr.optype = &ich9_spi->optype;
@@ -392,6 +419,12 @@ void spi_init(void)
cntlr.control = (uint16_t *)ich9_spi->ssfc;
cntlr.bbar = &ich9_spi->bbar;
cntlr.preop = &ich9_spi->preop;
+
+ if (cntlr.hsfs & HSFS_FDV)
+ {
+ writel_ (4, &ich9_spi->fdoc);
+ cntlr.flmap0 = readl_(&ich9_spi->fdod);
+ }
break;
}
default:
@@ -591,6 +624,15 @@ static int ich_status_poll(u16 bitmask, int wait_til_set)
return -1;
}
+static int spi_is_multichip (void)
+{
+ if (cntlr.revision != 9)
+ return 0;
+ if (!(cntlr.hsfs & HSFS_FDV))
+ return 0;
+ return !!((cntlr.flmap0 >> 8) & 3);
+}
+
int spi_xfer(struct spi_slave *slave, const void *dout,
unsigned int bitsout, void *din, unsigned int bitsin)
{
@@ -743,3 +785,282 @@ int spi_xfer(struct spi_slave *slave, const void *dout,
return 0;
}
+
+/* Sets FLA in FADDR to (addr & 0x01FFFFFF) without touching other bits. */
+static void ich_hwseq_set_addr(uint32_t addr)
+{
+ uint32_t addr_old = readl_(&cntlr.ich9_spi->faddr) & ~0x01FFFFFF;
+ writel_((addr & 0x01FFFFFF) | addr_old, &cntlr.ich9_spi->faddr);
+}
+
+/* Polls for Cycle Done Status, Flash Cycle Error or timeout in 8 us intervals.
+ Resets all error flags in HSFS.
+ Returns 0 if the cycle completes successfully without errors within
+ timeout us, 1 on errors. */
+static int ich_hwseq_wait_for_cycle_complete(unsigned int timeout,
+ unsigned int len)
+{
+ uint16_t hsfs;
+ uint32_t addr;
+
+ timeout /= 8; /* scale timeout duration to counter */
+ while ((((hsfs = readw_(&cntlr.ich9_spi->hsfs)) &
+ (HSFS_FDONE | HSFS_FCERR)) == 0) &&
+ --timeout) {
+ udelay(8);
+ }
+ writew_(readw_(&cntlr.ich9_spi->hsfs), &cntlr.ich9_spi->hsfs);
+
+ if (!timeout) {
+ uint16_t hsfc;
+ addr = readl_(&cntlr.ich9_spi->faddr) & 0x01FFFFFF;
+ hsfc = readw_(&cntlr.ich9_spi->hsfc);
+ printk(BIOS_ERR, "Transaction timeout between offset 0x%08x and "
+ "0x%08x (= 0x%08x + %d) HSFC=%x HSFS=%x!\n",
+ addr, addr + len - 1, addr, len - 1,
+ hsfc, hsfs);
+ return 1;
+ }
+
+ if (hsfs & HSFS_FCERR) {
+ uint16_t hsfc;
+ addr = readl_(&cntlr.ich9_spi->faddr) & 0x01FFFFFF;
+ hsfc = readw_(&cntlr.ich9_spi->hsfc);
+ printk(BIOS_ERR, "Transaction error between offset 0x%08x and "
+ "0x%08x (= 0x%08x + %d) HSFC=%x HSFS=%x!\n",
+ addr, addr + len - 1, addr, len - 1,
+ hsfc, hsfs);
+ return 1;
+ }
+ return 0;
+}
+
+
+static int ich_hwseq_erase(struct spi_flash *flash, u32 offset, size_t len)
+{
+ u32 start, end, erase_size;
+ int ret;
+ uint16_t hsfc;
+ uint16_t timeout = 1000 * 60;
+
+ erase_size = flash->sector_size;
+ if (offset % erase_size || len % erase_size) {
+ printk(BIOS_ERR, "SF: Erase offset/length not multiple of erase size\n");
+ return -1;
+ }
+
+ flash->spi->rw = SPI_WRITE_FLAG;
+ ret = spi_claim_bus(flash->spi);
+ if (ret) {
+ printk(BIOS_ERR, "SF: Unable to claim SPI bus\n");
+ return ret;
+ }
+
+ start = offset;
+ end = start + len;
+
+ while (offset < end) {
+ /* make sure FDONE, FCERR, AEL are cleared by writing 1 to them */
+ writew_(readw_(&cntlr.ich9_spi->hsfs), &cntlr.ich9_spi->hsfs);
+
+ ich_hwseq_set_addr(offset);
+
+ offset += erase_size;
+
+ hsfc = readw_(&cntlr.ich9_spi->hsfc);
+ hsfc &= ~HSFC_FCYCLE; /* clear operation */
+ hsfc |= (0x3 << HSFC_FCYCLE_OFF); /* set erase operation */
+ hsfc |= HSFC_FGO; /* start */
+ writew_(hsfc, &cntlr.ich9_spi->hsfc);
+ if (ich_hwseq_wait_for_cycle_complete(timeout, len))
+ {
+ printk(BIOS_ERR, "SF: Erase failed at %x\n", offset - erase_size);
+ ret = -1;
+ goto out;
+ }
+ }
+
+ printk(BIOS_DEBUG, "SF: Successfully erased %zu bytes @ %#x\n", len, start);
+
+out:
+ spi_release_bus(flash->spi);
+ return ret;
+}
+
+static void ich_read_data(uint8_t *data, int len)
+{
+ int i;
+ uint32_t temp32 = 0;
+
+ for (i = 0; i < len; i++) {
+ if ((i % 4) == 0)
+ temp32 = readl_(cntlr.data + i);
+
+ data[i] = (temp32 >> ((i % 4) * 8)) & 0xff;
+ }
+}
+
+static int ich_hwseq_read(struct spi_flash *flash,
+ u32 addr, size_t len, void *buf)
+{
+ uint16_t hsfc;
+ uint16_t timeout = 100 * 60;
+ uint8_t block_len;
+
+ if (addr + len > flash->size) {
+ printk (BIOS_ERR,
+ "Attempt to read %x-%x which is out of chip\n",
+ (unsigned) addr,
+ (unsigned) addr+(unsigned) len);
+ return -1;
+ }
+
+ /* clear FDONE, FCERR, AEL by writing 1 to them (if they are set) */
+ writew_(readw_(&cntlr.ich9_spi->hsfs), &cntlr.ich9_spi->hsfs);
+
+ while (len > 0) {
+ block_len = min(len, cntlr.databytes);
+ if (block_len > (~addr & 0xff))
+ block_len = (~addr & 0xff) + 1;
+ ich_hwseq_set_addr(addr);
+ hsfc = readw_(&cntlr.ich9_spi->hsfc);
+ hsfc &= ~HSFC_FCYCLE; /* set read operation */
+ hsfc &= ~HSFC_FDBC; /* clear byte count */
+ /* set byte count */
+ hsfc |= (((block_len - 1) << HSFC_FDBC_OFF) & HSFC_FDBC);
+ hsfc |= HSFC_FGO; /* start */
+ writew_(hsfc, &cntlr.ich9_spi->hsfc);
+
+ if (ich_hwseq_wait_for_cycle_complete(timeout, block_len))
+ return 1;
+ ich_read_data(buf, block_len);
+ addr += block_len;
+ buf += block_len;
+ len -= block_len;
+ }
+ return 0;
+}
+
+/* Fill len bytes from the data array into the fdata/spid registers.
+ *
+ * Note that using len > flash->pgm->spi.max_data_write will trash the registers
+ * following the data registers.
+ */
+static void ich_fill_data(const uint8_t *data, int len)
+{
+ uint32_t temp32 = 0;
+ int i;
+
+ if (len <= 0)
+ return;
+
+ for (i = 0; i < len; i++) {
+ if ((i % 4) == 0)
+ temp32 = 0;
+
+ temp32 |= ((uint32_t) data[i]) << ((i % 4) * 8);
+
+ if ((i % 4) == 3) /* 32 bits are full, write them to regs. */
+ writel_(temp32, cntlr.data + (i - (i % 4)));
+ }
+ i--;
+ if ((i % 4) != 3) /* Write remaining data to regs. */
+ writel_(temp32, cntlr.data + (i - (i % 4)));
+}
+
+static int ich_hwseq_write(struct spi_flash *flash,
+ u32 addr, size_t len, const void *buf)
+{
+ uint16_t hsfc;
+ uint16_t timeout = 100 * 60;
+ uint8_t block_len;
+ uint32_t start = addr;
+
+ if (addr + len > flash->size) {
+ printk (BIOS_ERR,
+ "Attempt to write 0x%x-0x%x which is out of chip\n",
+ (unsigned)addr, (unsigned) (addr+len));
+ return -1;
+ }
+
+ /* clear FDONE, FCERR, AEL by writing 1 to them (if they are set) */
+ writew_(readw_(&cntlr.ich9_spi->hsfs), &cntlr.ich9_spi->hsfs);
+
+ while (len > 0) {
+ block_len = min(len, cntlr.databytes);
+ if (block_len > (~addr & 0xff))
+ block_len = (~addr & 0xff) + 1;
+
+ ich_hwseq_set_addr(addr);
+
+ ich_fill_data(buf, block_len);
+ hsfc = readw_(&cntlr.ich9_spi->hsfc);
+ hsfc &= ~HSFC_FCYCLE; /* clear operation */
+ hsfc |= (0x2 << HSFC_FCYCLE_OFF); /* set write operation */
+ hsfc &= ~HSFC_FDBC; /* clear byte count */
+ /* set byte count */
+ hsfc |= (((block_len - 1) << HSFC_FDBC_OFF) & HSFC_FDBC);
+ hsfc |= HSFC_FGO; /* start */
+ writew_(hsfc, &cntlr.ich9_spi->hsfc);
+
+ if (ich_hwseq_wait_for_cycle_complete(timeout, block_len))
+ {
+ printk (BIOS_ERR, "SF: write failure at %x\n",
+ addr);
+ return -1;
+ }
+ addr += block_len;
+ buf += block_len;
+ len -= block_len;
+ }
+ printk(BIOS_DEBUG, "SF: Successfully written %u bytes @ %#x\n",
+ (unsigned) (addr - start), start);
+ return 0;
+}
+
+
+static struct spi_flash *spi_flash_hwseq(struct spi_slave *spi)
+{
+ struct spi_flash *flash = NULL;
+ uint32_t flcomp;
+
+ flash = malloc(sizeof(*flash));
+ if (!flash) {
+ printk(BIOS_WARNING, "SF: Failed to allocate memory\n");
+ return NULL;
+ }
+
+ flash->spi = spi;
+ flash->name = "Opaque HW-sequencing";
+
+ flash->write = ich_hwseq_write;
+ flash->erase = ich_hwseq_erase;
+ flash->read = ich_hwseq_read;
+ ich_hwseq_set_addr (0);
+ switch ((cntlr.hsfs >> 3) & 3)
+ {
+ case 0:
+ flash->sector_size = 256;
+ break;
+ case 1:
+ flash->sector_size = 4096;
+ break;
+ case 2:
+ flash->sector_size = 8192;
+ break;
+ case 3:
+ flash->sector_size = 65536;
+ break;
+ }
+
+ writel_ (0x1000, &cntlr.ich9_spi->fdoc);
+ flcomp = readl_(&cntlr.ich9_spi->fdod);
+
+ flash->size = 1 << (19 + (flcomp & 7));
+
+ if ((cntlr.hsfs & HSFS_FDV) && ((cntlr.flmap0 >> 8) & 3))
+ flash->size += 1 << (19 + ((flcomp >> 3) & 7));
+ printk (BIOS_DEBUG, "flash size 0x%x bytes\n", flash->size);
+
+ return flash;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-12 03:00:02 +0000