Merge branch 'spi' of git://git.denx.de/u-boot-x86

36 files changed, 1062 insertions, 138 deletions

diff --git a/drivers/mtd/spi/atmel.c b/drivers/mtd/spi/atmel.c
index 006f6d5..6a92c4b 100644
--- a/drivers/mtd/spi/atmel.c
+++ b/drivers/mtd/spi/atmel.c
@@ -480,15 +480,13 @@ struct spi_flash *spi_flash_probe_atmel(struct spi_slave *spi, u8 *idcode)
 		return NULL;
 	}
 
-	asf = malloc(sizeof(struct atmel_spi_flash));
+	asf = spi_flash_alloc(struct atmel_spi_flash, spi, params->name);
 	if (!asf) {
 		debug("SF: Failed to allocate memory\n");
 		return NULL;
 	}
 
 	asf->params = params;
-	asf->flash.spi = spi;
-	asf->flash.name = params->name;
 
 	/* Assuming power-of-two page size initially. */
 	page_size = 1 << params->l2_page_size;
@@ -513,7 +511,6 @@ struct spi_flash *spi_flash_probe_atmel(struct spi_slave *spi, u8 *idcode)
 			asf->flash.erase = dataflash_erase_at45;
 			page_size += 1 << (params->l2_page_size - 5);
 		} else {
-			asf->flash.read = spi_flash_cmd_read_fast;
 			asf->flash.write = dataflash_write_p2;
 			asf->flash.erase = dataflash_erase_p2;
 		}
@@ -524,9 +521,6 @@ struct spi_flash *spi_flash_probe_atmel(struct spi_slave *spi, u8 *idcode)
 
 	case DF_FAMILY_AT26F:
 	case DF_FAMILY_AT26DF:
-		asf->flash.read = spi_flash_cmd_read_fast;
-		asf->flash.write = spi_flash_cmd_write_multi;
-		asf->flash.erase = spi_flash_cmd_erase;
 		asf->flash.page_size = page_size;
 		asf->flash.sector_size = 4096;
 		/* clear SPRL# bit for locked flash */
diff --git a/drivers/mtd/spi/eon.c b/drivers/mtd/spi/eon.c
index 691ed4e..b16e7ab 100644
--- a/drivers/mtd/spi/eon.c
+++ b/drivers/mtd/spi/eon.c
@@ -46,18 +46,12 @@ struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode)
 		return NULL;
 	}
 
-	flash = malloc(sizeof(*flash));
+	flash = spi_flash_alloc_base(spi, params->name);
 	if (!flash) {
 		debug("SF: Failed to allocate memory\n");
 		return NULL;
 	}
 
-	flash->spi = spi;
-	flash->name = params->name;
-
-	flash->write = spi_flash_cmd_write_multi;
-	flash->erase = spi_flash_cmd_erase;
-	flash->read = spi_flash_cmd_read_fast;
 	flash->page_size = 256;
 	flash->sector_size = 256 * 16 * 16;
 	flash->size = 256 * 16
diff --git a/drivers/mtd/spi/macronix.c b/drivers/mtd/spi/macronix.c
index c97a39d..036c30d 100644
--- a/drivers/mtd/spi/macronix.c
+++ b/drivers/mtd/spi/macronix.c
@@ -97,18 +97,12 @@ struct spi_flash *spi_flash_probe_macronix(struct spi_slave *spi, u8 *idcode)
 		return NULL;
 	}
 
-	flash = malloc(sizeof(*flash));
+	flash = spi_flash_alloc_base(spi, params->name);
 	if (!flash) {
 		debug("SF: Failed to allocate memory\n");
 		return NULL;
 	}
 
-	flash->spi = spi;
-	flash->name = params->name;
-
-	flash->write = spi_flash_cmd_write_multi;
-	flash->erase = spi_flash_cmd_erase;
-	flash->read = spi_flash_cmd_read_fast;
 	flash->page_size = 256;
 	flash->sector_size = 256 * 16 * 16;
 	flash->size = flash->sector_size * params->nr_blocks;
diff --git a/drivers/mtd/spi/ramtron.c b/drivers/mtd/spi/ramtron.c
index 0999781..5299a6d 100644
--- a/drivers/mtd/spi/ramtron.c
+++ b/drivers/mtd/spi/ramtron.c
@@ -284,15 +284,13 @@ struct spi_flash *spi_fram_probe_ramtron(struct spi_slave *spi, u8 *idcode)
 	return NULL;
 
 found:
-	sn = malloc(sizeof(*sn));
+	sn = spi_flash_alloc(struct ramtron_spi_fram, spi, params->name);
 	if (!sn) {
 		debug("SF: Failed to allocate memory\n");
 		return NULL;
 	}
 
 	sn->params = params;
-	sn->flash.spi = spi;
-	sn->flash.name = params->name;
 
 	sn->flash.write = ramtron_write;
 	sn->flash.read = ramtron_read;
diff --git a/drivers/mtd/spi/spansion.c b/drivers/mtd/spi/spansion.c
index 9288672..bc558c4 100644
--- a/drivers/mtd/spi/spansion.c
+++ b/drivers/mtd/spi/spansion.c
@@ -128,18 +128,12 @@ struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode)
 		return NULL;
 	}
 
-	flash = malloc(sizeof(*flash));
+	flash = spi_flash_alloc_base(spi, params->name);
 	if (!flash) {
 		debug("SF: Failed to allocate memory\n");
 		return NULL;
 	}
 
-	flash->spi = spi;
-	flash->name = params->name;
-
-	flash->write = spi_flash_cmd_write_multi;
-	flash->erase = spi_flash_cmd_erase;
-	flash->read = spi_flash_cmd_read_fast;
 	flash->page_size = 256;
 	flash->sector_size = 256 * params->pages_per_sector;
 	flash->size = flash->sector_size * params->nr_sectors;
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index 00aece9..111185a 100644
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -8,6 +8,7 @@
  */
 
 #include <common.h>
+#include <fdtdec.h>
 #include <malloc.h>
 #include <spi.h>
 #include <spi_flash.h>
@@ -15,6 +16,8 @@
 
 #include "spi_flash_internal.h"
 
+DECLARE_GLOBAL_DATA_PTR;
+
 static void spi_flash_addr(u32 addr, u8 *cmd)
 {
 	/* cmd[0] is actual command */
@@ -87,6 +90,9 @@ int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
 	for (actual = 0; actual < len; actual += chunk_len) {
 		chunk_len = min(len - actual, page_size - byte_addr);
 
+		if (flash->spi->max_write_size)
+			chunk_len = min(chunk_len, flash->spi->max_write_size);
+
 		cmd[1] = page_addr >> 8;
 		cmd[2] = page_addr;
 		cmd[3] = byte_addr;
@@ -111,8 +117,11 @@ int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
 		if (ret)
 			break;
 
-		page_addr++;
-		byte_addr = 0;
+		byte_addr += chunk_len;
+		if (byte_addr == page_size) {
+			page_addr++;
+			byte_addr = 0;
+		}
 	}
 
 	debug("SF: program %s %zu bytes @ %#x\n",
@@ -140,6 +149,10 @@ int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
 {
 	u8 cmd[5];
 
+	/* Handle memory-mapped SPI */
+	if (flash->memory_map)
+		memcpy(data, flash->memory_map + offset, len);
+
 	cmd[0] = CMD_READ_ARRAY_FAST;
 	spi_flash_addr(offset, cmd);
 	cmd[4] = 0x00;
@@ -269,6 +282,34 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr)
 	return 0;
 }
 
+#ifdef CONFIG_OF_CONTROL
+int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash)
+{
+	fdt_addr_t addr;
+	fdt_size_t size;
+	int node;
+
+	/* If there is no node, do nothing */
+	node = fdtdec_next_compatible(blob, 0, COMPAT_GENERIC_SPI_FLASH);
+	if (node < 0)
+		return 0;
+
+	addr = fdtdec_get_addr_size(blob, node, "memory-map", &size);
+	if (addr == FDT_ADDR_T_NONE) {
+		debug("%s: Cannot decode address\n", __func__);
+		return 0;
+	}
+
+	if (flash->size != size) {
+		debug("%s: Memory map must cover entire device\n", __func__);
+		return -1;
+	}
+	flash->memory_map = (void *)addr;
+
+	return 0;
+}
+#endif /* CONFIG_OF_CONTROL */
+
 /*
  * The following table holds all device probe functions
  *
@@ -385,9 +426,18 @@ struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
 		goto err_manufacturer_probe;
 	}
 
+#ifdef CONFIG_OF_CONTROL
+	if (spi_flash_decode_fdt(gd->fdt_blob, flash)) {
+		debug("SF: FDT decode error\n");
+		goto err_manufacturer_probe;
+	}
+#endif
 	printf("SF: Detected %s with page size ", flash->name);
 	print_size(flash->sector_size, ", total ");
-	print_size(flash->size, "\n");
+	print_size(flash->size, "");
+	if (flash->memory_map)
+		printf(", mapped at %p", flash->memory_map);
+	puts("\n");
 
 	spi_release_bus(spi);
 
@@ -401,6 +451,31 @@ err_claim_bus:
 	return NULL;
 }
 
+void *spi_flash_do_alloc(int offset, int size, struct spi_slave *spi,
+			 const char *name)
+{
+	struct spi_flash *flash;
+	void *ptr;
+
+	ptr = malloc(size);
+	if (!ptr) {
+		debug("SF: Failed to allocate memory\n");
+		return NULL;
+	}
+	memset(ptr, '\0', size);
+	flash = (struct spi_flash *)(ptr + offset);
+
+	/* Set up some basic fields - caller will sort out sizes */
+	flash->spi = spi;
+	flash->name = name;
+
+	flash->read = spi_flash_cmd_read_fast;
+	flash->write = spi_flash_cmd_write_multi;
+	flash->erase = spi_flash_cmd_erase;
+
+	return flash;
+}
+
 void spi_flash_free(struct spi_flash *flash)
 {
 	spi_free_slave(flash->spi);
diff --git a/drivers/mtd/spi/sst.c b/drivers/mtd/spi/sst.c
index ced4f24..95f5490 100644
--- a/drivers/mtd/spi/sst.c
+++ b/drivers/mtd/spi/sst.c
@@ -203,22 +203,16 @@ spi_flash_probe_sst(struct spi_slave *spi, u8 *idcode)
 		return NULL;
 	}
 
-	stm = malloc(sizeof(*stm));
+	stm = spi_flash_alloc(struct sst_spi_flash, spi, params->name);
 	if (!stm) {
 		debug("SF: Failed to allocate memory\n");
 		return NULL;
 	}
 
 	stm->params = params;
-	stm->flash.spi = spi;
-	stm->flash.name = params->name;
 
 	if (stm->params->flags & SST_FEAT_WP)
 		stm->flash.write = sst_write_wp;
-	else
-		stm->flash.write = spi_flash_cmd_write_multi;
-	stm->flash.erase = spi_flash_cmd_erase;
-	stm->flash.read = spi_flash_cmd_read_fast;
 	stm->flash.page_size = 256;
 	stm->flash.sector_size = 4096;
 	stm->flash.size = stm->flash.sector_size * params->nr_sectors;
diff --git a/drivers/mtd/spi/stmicro.c b/drivers/mtd/spi/stmicro.c
index 8a19344..2a9972b 100644
--- a/drivers/mtd/spi/stmicro.c
+++ b/drivers/mtd/spi/stmicro.c
@@ -176,18 +176,12 @@ struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
 		return NULL;
 	}
 
-	flash = malloc(sizeof(*flash));
+	flash = spi_flash_alloc_base(spi, params->name);
 	if (!flash) {
 		debug("SF: Failed to allocate memory\n");
 		return NULL;
 	}
 
-	flash->spi = spi;
-	flash->name = params->name;
-
-	flash->write = spi_flash_cmd_write_multi;
-	flash->erase = spi_flash_cmd_erase;
-	flash->read = spi_flash_cmd_read_fast;
 	flash->page_size = 256;
 	flash->sector_size = 256 * params->pages_per_sector;
 	flash->size = flash->sector_size * params->nr_sectors;
diff --git a/drivers/mtd/spi/winbond.c b/drivers/mtd/spi/winbond.c
index 4418302..05dc644 100644
--- a/drivers/mtd/spi/winbond.c
+++ b/drivers/mtd/spi/winbond.c
@@ -92,18 +92,12 @@ struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode)
 		return NULL;
 	}
 
-	flash = malloc(sizeof(*flash));
+	flash = spi_flash_alloc_base(spi, params->name);
 	if (!flash) {
 		debug("SF: Failed to allocate memory\n");
 		return NULL;
 	}
 
-	flash->spi = spi;
-	flash->name = params->name;
-
-	flash->write = spi_flash_cmd_write_multi;
-	flash->erase = spi_flash_cmd_erase;
-	flash->read = spi_flash_cmd_read_fast;
 	flash->page_size = 256;
 	flash->sector_size = 4096;
 	flash->size = 4096 * 16 * params->nr_blocks;
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index b8264df..4268595 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -25,6 +25,9 @@ include $(TOPDIR)/config.mk
 
 LIB	:= $(obj)libspi.o
 
+# There are many options which enable SPI, so make this library available
+COBJS-y += spi.o
+
 COBJS-$(CONFIG_ALTERA_SPI) += altera_spi.o
 COBJS-$(CONFIG_ANDES_SPI) += andes_spi.o
 COBJS-$(CONFIG_ARMADA100_SPI) += armada100_spi.o
@@ -36,6 +39,7 @@ COBJS-$(CONFIG_CF_SPI) += cf_spi.o
 COBJS-$(CONFIG_CF_QSPI) += cf_qspi.o
 COBJS-$(CONFIG_DAVINCI_SPI) += davinci_spi.o
 COBJS-$(CONFIG_EXYNOS_SPI) += exynos_spi.o
+COBJS-$(CONFIG_ICH_SPI) +=  ich.o
 COBJS-$(CONFIG_KIRKWOOD_SPI) += kirkwood_spi.o
 COBJS-$(CONFIG_MPC52XX_SPI) += mpc52xx_spi.o
 COBJS-$(CONFIG_MPC8XXX_SPI) += mpc8xxx_spi.o
diff --git a/drivers/spi/altera_spi.c b/drivers/spi/altera_spi.c
index 138d6f4..b53607a 100644
--- a/drivers/spi/altera_spi.c
+++ b/drivers/spi/altera_spi.c
@@ -83,12 +83,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	if (!spi_cs_is_valid(bus, cs))
 		return NULL;
 
-	altspi = malloc(sizeof(*altspi));
+	altspi = spi_alloc_slave(struct altera_spi_slave, bus, cs);
 	if (!altspi)
 		return NULL;
 
-	altspi->slave.bus = bus;
-	altspi->slave.cs = cs;
 	altspi->base = altera_spi_base_list[bus];
 	debug("%s: bus:%i cs:%i base:%lx\n", __func__,
 		bus, cs, altspi->base);
diff --git a/drivers/spi/andes_spi.c b/drivers/spi/andes_spi.c
index fdde139..c56377b 100644
--- a/drivers/spi/andes_spi.c
+++ b/drivers/spi/andes_spi.c
@@ -53,12 +53,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	if (!spi_cs_is_valid(bus, cs))
 		return NULL;
 
-	ds = malloc(sizeof(*ds));
+	ds = spi_alloc_slave(struct andes_spi_slave, bus, cs);
 	if (!ds)
 		return NULL;
 
-	ds->slave.bus = bus;
-	ds->slave.cs = cs;
 	ds->regs = (struct andes_spi_regs *)CONFIG_SYS_SPI_BASE;
 
 	/*
diff --git a/drivers/spi/armada100_spi.c b/drivers/spi/armada100_spi.c
index 7384c9c..afdbe05 100644
--- a/drivers/spi/armada100_spi.c
+++ b/drivers/spi/armada100_spi.c
@@ -120,12 +120,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 {
 	struct armd_spi_slave *pss;
 
-	pss = malloc(sizeof(*pss));
+	pss = spi_alloc_slave(struct armd_spi_slave, bus, cs);
 	if (!pss)
 		return NULL;
 
-	pss->slave.bus = bus;
-	pss->slave.cs = cs;
 	pss->spi_reg = (struct ssp_reg *)SSP_REG_BASE(CONFIG_SYS_SSP_PORT);
 
 	pss->cr0 = SSCR0_MOTO | SSCR0_DATASIZE(DEFAULT_WORD_LEN) | SSCR0_SSE;
diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c
index ce7d460..f4b1bad 100644
--- a/drivers/spi/atmel_spi.c
+++ b/drivers/spi/atmel_spi.c
@@ -84,12 +84,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	if (mode & SPI_CPOL)
 		csrx |= ATMEL_SPI_CSRx_CPOL;
 
-	as = malloc(sizeof(struct atmel_spi_slave));
+	as = spi_alloc_slave(struct atmel_spi_slave, bus, cs);
 	if (!as)
 		return NULL;
 
-	as->slave.bus = bus;
-	as->slave.cs = cs;
 	as->regs = regs;
 	as->mr = ATMEL_SPI_MR_MSTR | ATMEL_SPI_MR_MODFDIS
 #if defined(CONFIG_AT91SAM9X5) || defined(CONFIG_AT91SAM9M10G45)
diff --git a/drivers/spi/bfin_spi.c b/drivers/spi/bfin_spi.c
index e080bec..ab2e8b9 100644
--- a/drivers/spi/bfin_spi.c
+++ b/drivers/spi/bfin_spi.c
@@ -182,12 +182,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 		default: return NULL;
 	}
 
-	bss = malloc(sizeof(*bss));
+	bss = spi_alloc_slave(struct bfin_spi_slave, bus, cs);
 	if (!bss)
 		return NULL;
 
-	bss->slave.bus = bus;
-	bss->slave.cs = cs;
 	bss->mmr_base = (void *)mmr_base;
 	bss->ctl = SPE | MSTR | TDBR_CORE;
 	if (mode & SPI_CPHA) bss->ctl |= CPHA;
diff --git a/drivers/spi/bfin_spi6xx.c b/drivers/spi/bfin_spi6xx.c
index fde3447..c25c4a9 100644
--- a/drivers/spi/bfin_spi6xx.c
+++ b/drivers/spi/bfin_spi6xx.c
@@ -178,12 +178,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 		return NULL;
 	}
 
-	bss = malloc(sizeof(*bss));
+	bss = spi_alloc_slave(struct bfin_spi_slave, bus, cs);
 	if (!bss)
 		return NULL;
 
-	bss->slave.bus = bus;
-	bss->slave.cs = cs;
 	bss->regs = (struct bfin_spi_regs *)reg_base;
 	bss->control = SPI_CTL_EN | SPI_CTL_MSTR;
 	if (mode & SPI_CPHA)
diff --git a/drivers/spi/cf_qspi.c b/drivers/spi/cf_qspi.c
index 72dd1a5..a37ac4e 100644
--- a/drivers/spi/cf_qspi.c
+++ b/drivers/spi/cf_qspi.c
@@ -120,13 +120,11 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	if (!spi_cs_is_valid(bus, cs))
 		return NULL;
 
-	dev = malloc(sizeof(struct cf_qspi_slave));
+	dev = spi_alloc_slave(struct cf_qspi_slave, bus, cs);
 	if (!dev)
 		return NULL;
 
 	/* Initialize to known value */
-	dev->slave.bus = bus;
-	dev->slave.cs  = cs;
 	dev->regs      = (qspi_t *)MMAP_QSPI;
 	dev->qmr       = 0;
 	dev->qwr       = 0;
diff --git a/drivers/spi/cf_spi.c b/drivers/spi/cf_spi.c
index a883da9..afe7917 100644
--- a/drivers/spi/cf_spi.c
+++ b/drivers/spi/cf_spi.c
@@ -330,12 +330,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	if (!spi_cs_is_valid(bus, cs))
 		return NULL;
 
-	cfslave = malloc(sizeof(struct cf_spi_slave));
+	cfslave = spi_alloc_slave(struct cf_spi_slave, bus, cs);
 	if (!cfslave)
 		return NULL;
 
-	cfslave->slave.bus = bus;
-	cfslave->slave.cs = cs;
 	cfslave->baudrate = max_hz;
 
 	/* specific setup */
diff --git a/drivers/spi/davinci_spi.c b/drivers/spi/davinci_spi.c
index 13aca52..74792af 100644
--- a/drivers/spi/davinci_spi.c
+++ b/drivers/spi/davinci_spi.c
@@ -44,12 +44,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	if (!spi_cs_is_valid(bus, cs))
 		return NULL;
 
-	ds = malloc(sizeof(*ds));
+	ds = spi_alloc_slave(struct davinci_spi_slave, bus, cs);
 	if (!ds)
 		return NULL;
 
-	ds->slave.bus = bus;
-	ds->slave.cs = cs;
 	ds->regs = (struct davinci_spi_regs *)CONFIG_SYS_SPI_BASE;
 	ds->freq = max_hz;
 
diff --git a/drivers/spi/exynos_spi.c b/drivers/spi/exynos_spi.c
index be60ada..51b3d30 100644
--- a/drivers/spi/exynos_spi.c
+++ b/drivers/spi/exynos_spi.c
@@ -89,15 +89,13 @@ struct spi_slave *spi_setup_slave(unsigned int busnum, unsigned int cs,
 		return NULL;
 	}
 
-	spi_slave = malloc(sizeof(*spi_slave));
+	spi_slave = spi_alloc_slave(struct exynos_spi_slave, busnum, cs);
 	if (!spi_slave) {
 		debug("%s: Could not allocate spi_slave\n", __func__);
 		return NULL;
 	}
 
 	bus = &spi_bus[busnum];
-	spi_slave->slave.bus = busnum;
-	spi_slave->slave.cs = cs;
 	spi_slave->regs = bus->regs;
 	spi_slave->mode = mode;
 	spi_slave->periph_id = bus->periph_id;
diff --git a/drivers/spi/fsl_espi.c b/drivers/spi/fsl_espi.c
index eb99e90..28609ee 100644
--- a/drivers/spi/fsl_espi.c
+++ b/drivers/spi/fsl_espi.c
@@ -79,12 +79,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	if (!spi_cs_is_valid(bus, cs))
 		return NULL;
 
-	fsl = malloc(sizeof(struct fsl_spi_slave));
+	fsl = spi_alloc_slave(struct fsl_spi_slave, bus, cs);
 	if (!fsl)
 		return NULL;
 
-	fsl->slave.bus = bus;
-	fsl->slave.cs = cs;
 	fsl->mode = mode;
 	fsl->max_transfer_length = ESPI_MAX_DATA_TRANSFER_LEN;
 
diff --git a/drivers/spi/ich.c b/drivers/spi/ich.c
new file mode 100644
index 0000000..8865df5
--- /dev/null
+++ b/drivers/spi/ich.c
@@ -0,0 +1,754 @@
+/*
+ * Copyright (c) 2011-12 The Chromium OS Authors.
+ *
+ * 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.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * This file is derived from the flashrom project.
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <spi.h>
+#include <pci.h>
+#include <pci_ids.h>
+#include <asm/io.h>
+
+#include "ich.h"
+
+#define SPI_OPCODE_WREN      0x06
+#define SPI_OPCODE_FAST_READ 0x0b
+
+struct ich_ctlr {
+	pci_dev_t dev;		/* PCI device number */
+	int ich_version;	/* Controller version, 7 or 9 */
+	int ichspi_lock;
+	int locked;
+	uint8_t *opmenu;
+	int menubytes;
+	void *base;		/* Base of register set */
+	uint16_t *preop;
+	uint16_t *optype;
+	uint32_t *addr;
+	uint8_t *data;
+	unsigned databytes;
+	uint8_t *status;
+	uint16_t *control;
+	uint32_t *bbar;
+	uint32_t *pr;		/* only for ich9 */
+	uint8_t *speed;		/* pointer to speed control */
+	ulong max_speed;	/* Maximum bus speed in MHz */
+};
+
+struct ich_ctlr ctlr;
+
+static inline struct ich_spi_slave *to_ich_spi(struct spi_slave *slave)
+{
+	return container_of(slave, struct ich_spi_slave, slave);
+}
+
+static unsigned int ich_reg(const void *addr)
+{
+	return (unsigned)(addr - ctlr.base) & 0xffff;
+}
+
+static u8 ich_readb(const void *addr)
+{
+	u8 value = readb(addr);
+
+	debug("read %2.2x from %4.4x\n", value, ich_reg(addr));
+
+	return value;
+}
+
+static u16 ich_readw(const void *addr)
+{
+	u16 value = readw(addr);
+
+	debug("read %4.4x from %4.4x\n", value, ich_reg(addr));
+
+	return value;
+}
+
+static u32 ich_readl(const void *addr)
+{
+	u32 value = readl(addr);
+
+	debug("read %8.8x from %4.4x\n", value, ich_reg(addr));
+
+	return value;
+}
+
+static void ich_writeb(u8 value, void *addr)
+{
+	writeb(value, addr);
+	debug("wrote %2.2x to %4.4x\n", value, ich_reg(addr));
+}
+
+static void ich_writew(u16 value, void *addr)
+{
+	writew(value, addr);
+	debug("wrote %4.4x to %4.4x\n", value, ich_reg(addr));
+}
+
+static void ich_writel(u32 value, void *addr)
+{
+	writel(value, addr);
+	debug("wrote %8.8x to %4.4x\n", value, ich_reg(addr));
+}
+
+static void write_reg(const void *value, void *dest, uint32_t size)
+{
+	memcpy_toio(dest, value, size);
+}
+
+static void read_reg(const void *src, void *value, uint32_t size)
+{
+	memcpy_fromio(value, src, size);
+}
+
+static void ich_set_bbar(struct ich_ctlr *ctlr, uint32_t minaddr)
+{
+	const uint32_t bbar_mask = 0x00ffff00;
+	uint32_t ichspi_bbar;
+
+	minaddr &= bbar_mask;
+	ichspi_bbar = ich_readl(ctlr->bbar) & ~bbar_mask;
+	ichspi_bbar |= minaddr;
+	ich_writel(ichspi_bbar, ctlr->bbar);
+}
+
+int spi_cs_is_valid(unsigned int bus, unsigned int cs)
+{
+	puts("spi_cs_is_valid used but not implemented\n");
+	return 0;
+}
+
+struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
+		unsigned int max_hz, unsigned int mode)
+{
+	struct ich_spi_slave *ich;
+
+	ich = spi_alloc_slave(struct ich_spi_slave, bus, cs);
+	if (!ich) {
+		puts("ICH SPI: Out of memory\n");
+		return NULL;
+	}
+
+	/*
+	 * Yes this controller can only write a small number of bytes at
+	 * once! The limit is typically 64 bytes.
+	 */
+	ich->slave.max_write_size = ctlr.databytes;
+	ich->speed = max_hz;
+
+	return &ich->slave;
+}
+
+void spi_free_slave(struct spi_slave *slave)
+{
+	struct ich_spi_slave *ich = to_ich_spi(slave);
+
+	free(ich);
+}
+
+/*
+ * Check if this device ID matches one of supported Intel PCH devices.
+ *
+ * Return the ICH version if there is a match, or zero otherwise.
+ */
+static int get_ich_version(uint16_t device_id)
+{
+	if (device_id == PCI_DEVICE_ID_INTEL_TGP_LPC)
+		return 7;
+
+	if ((device_id >= PCI_DEVICE_ID_INTEL_COUGARPOINT_LPC_MIN &&
+	     device_id <= PCI_DEVICE_ID_INTEL_COUGARPOINT_LPC_MAX) ||
+	    (device_id >= PCI_DEVICE_ID_INTEL_PANTHERPOINT_LPC_MIN &&
+	     device_id <= PCI_DEVICE_ID_INTEL_PANTHERPOINT_LPC_MAX))
+		return 9;
+
+	return 0;
+}
+
+/* @return 1 if the SPI flash supports the 33MHz speed */
+static int ich9_can_do_33mhz(pci_dev_t dev)
+{
+	u32 fdod, speed;
+
+	/* Observe SPI Descriptor Component Section 0 */
+	pci_write_config_dword(dev, 0xb0, 0x1000);
+
+	/* Extract the Write/Erase SPI Frequency from descriptor */
+	pci_read_config_dword(dev, 0xb4, &fdod);
+
+	/* Bits 23:21 have the fast read clock frequency, 0=20MHz, 1=33MHz */
+	speed = (fdod >> 21) & 7;
+
+	return speed == 1;
+}
+
+static int ich_find_spi_controller(pci_dev_t *devp, int *ich_versionp)
+{
+	int last_bus = pci_last_busno();
+	int bus;
+
+	if (last_bus == -1) {
+		debug("No PCI busses?\n");
+		return -1;
+	}
+
+	for (bus = 0; bus <= last_bus; bus++) {
+		uint16_t vendor_id, device_id;
+		uint32_t ids;
+		pci_dev_t dev;
+
+		dev = PCI_BDF(bus, 31, 0);
+		pci_read_config_dword(dev, 0, &ids);
+		vendor_id = ids;
+		device_id = ids >> 16;
+
+		if (vendor_id == PCI_VENDOR_ID_INTEL) {
+			*devp = dev;
+			*ich_versionp = get_ich_version(device_id);
+			return 0;
+		}
+	}
+
+	debug("ICH SPI: No ICH found.\n");
+	return -1;
+}
+
+static int ich_init_controller(struct ich_ctlr *ctlr)
+{
+	uint8_t *rcrb; /* Root Complex Register Block */
+	uint32_t rcba; /* Root Complex Base Address */
+
+	pci_read_config_dword(ctlr->dev, 0xf0, &rcba);
+	/* Bits 31-14 are the base address, 13-1 are reserved, 0 is enable. */
+	rcrb = (uint8_t *)(rcba & 0xffffc000);
+	if (ctlr->ich_version == 7) {
+		struct ich7_spi_regs *ich7_spi;
+
+		ich7_spi = (struct ich7_spi_regs *)(rcrb + 0x3020);
+		ctlr->ichspi_lock = ich_readw(&ich7_spi->spis) & SPIS_LOCK;
+		ctlr->opmenu = ich7_spi->opmenu;
+		ctlr->menubytes = sizeof(ich7_spi->opmenu);
+		ctlr->optype = &ich7_spi->optype;
+		ctlr->addr = &ich7_spi->spia;
+		ctlr->data = (uint8_t *)ich7_spi->spid;
+		ctlr->databytes = sizeof(ich7_spi->spid);
+		ctlr->status = (uint8_t *)&ich7_spi->spis;
+		ctlr->control = &ich7_spi->spic;
+		ctlr->bbar = &ich7_spi->bbar;
+		ctlr->preop = &ich7_spi->preop;
+		ctlr->base = ich7_spi;
+	} else if (ctlr->ich_version == 9) {
+		struct ich9_spi_regs *ich9_spi;
+
+		ich9_spi = (struct ich9_spi_regs *)(rcrb + 0x3800);
+		ctlr->ichspi_lock = ich_readw(&ich9_spi->hsfs) & HSFS_FLOCKDN;
+		ctlr->opmenu = ich9_spi->opmenu;
+		ctlr->menubytes = sizeof(ich9_spi->opmenu);
+		ctlr->optype = &ich9_spi->optype;
+		ctlr->addr = &ich9_spi->faddr;
+		ctlr->data = (uint8_t *)ich9_spi->fdata;
+		ctlr->databytes = sizeof(ich9_spi->fdata);
+		ctlr->status = &ich9_spi->ssfs;
+		ctlr->control = (uint16_t *)ich9_spi->ssfc;
+		ctlr->speed = ich9_spi->ssfc + 2;
+		ctlr->bbar = &ich9_spi->bbar;
+		ctlr->preop = &ich9_spi->preop;
+		ctlr->pr = &ich9_spi->pr[0];
+		ctlr->base = ich9_spi;
+	} else {
+		debug("ICH SPI: Unrecognized ICH version %d.\n",
+		      ctlr->ich_version);
+		return -1;
+	}
+	debug("ICH SPI: Version %d detected\n", ctlr->ich_version);
+
+	/* Work out the maximum speed we can support */
+	ctlr->max_speed = 20000000;
+	if (ctlr->ich_version == 9 && ich9_can_do_33mhz(ctlr->dev))
+		ctlr->max_speed = 33000000;
+
+	ich_set_bbar(ctlr, 0);
+
+	return 0;
+}
+
+void spi_init(void)
+{
+	uint8_t bios_cntl;
+
+	if (ich_find_spi_controller(&ctlr.dev, &ctlr.ich_version)) {
+		printf("ICH SPI: Cannot find device\n");
+		return;
+	}
+
+	if (ich_init_controller(&ctlr)) {
+		printf("ICH SPI: Cannot setup controller\n");
+		return;
+	}
+
+	/*
+	 * Disable the BIOS write protect so write commands are allowed.  On
+	 * v9, deassert SMM BIOS Write Protect Disable.
+	 */
+	pci_read_config_byte(ctlr.dev, 0xdc, &bios_cntl);
+	if (ctlr.ich_version == 9)
+		bios_cntl &= ~(1 << 5);
+	pci_write_config_byte(ctlr.dev, 0xdc, bios_cntl | 0x1);
+}
+
+int spi_claim_bus(struct spi_slave *slave)
+{
+	/* Handled by ICH automatically. */
+	return 0;
+}
+
+void spi_release_bus(struct spi_slave *slave)
+{
+	/* Handled by ICH automatically. */
+}
+
+void spi_cs_activate(struct spi_slave *slave)
+{
+	/* Handled by ICH automatically. */
+}
+
+void spi_cs_deactivate(struct spi_slave *slave)
+{
+	/* Handled by ICH automatically. */
+}
+
+static inline void spi_use_out(struct spi_trans *trans, unsigned bytes)
+{
+	trans->out += bytes;
+	trans->bytesout -= bytes;
+}
+
+static inline void spi_use_in(struct spi_trans *trans, unsigned bytes)
+{
+	trans->in += bytes;
+	trans->bytesin -= bytes;
+}
+
+static void spi_setup_type(struct spi_trans *trans, int data_bytes)
+{
+	trans->type = 0xFF;
+
+	/* Try to guess spi type from read/write sizes. */
+	if (trans->bytesin == 0) {
+		if (trans->bytesout + data_bytes > 4)
+			/*
+			 * If bytesin = 0 and bytesout > 4, we presume this is
+			 * a write data operation, which is accompanied by an
+			 * address.
+			 */
+			trans->type = SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS;
+		else
+			trans->type = SPI_OPCODE_TYPE_WRITE_NO_ADDRESS;
+		return;
+	}
+
+	if (trans->bytesout == 1) {	/* and bytesin is > 0 */
+		trans->type = SPI_OPCODE_TYPE_READ_NO_ADDRESS;
+		return;
+	}
+
+	if (trans->bytesout == 4)	/* and bytesin is > 0 */
+		trans->type = SPI_OPCODE_TYPE_READ_WITH_ADDRESS;
+
+	/* Fast read command is called with 5 bytes instead of 4 */
+	if (trans->out[0] == SPI_OPCODE_FAST_READ && trans->bytesout == 5) {
+		trans->type = SPI_OPCODE_TYPE_READ_WITH_ADDRESS;
+		--trans->bytesout;
+	}
+}
+
+static int spi_setup_opcode(struct spi_trans *trans)
+{
+	uint16_t optypes;
+	uint8_t opmenu[ctlr.menubytes];
+
+	trans->opcode = trans->out[0];
+	spi_use_out(trans, 1);
+	if (!ctlr.ichspi_lock) {
+		/* The lock is off, so just use index 0. */
+		ich_writeb(trans->opcode, ctlr.opmenu);
+		optypes = ich_readw(ctlr.optype);
+		optypes = (optypes & 0xfffc) | (trans->type & 0x3);
+		ich_writew(optypes, ctlr.optype);
+		return 0;
+	} else {
+		/* The lock is on. See if what we need is on the menu. */
+		uint8_t optype;
+		uint16_t opcode_index;
+
+		/* Write Enable is handled as atomic prefix */
+		if (trans->opcode == SPI_OPCODE_WREN)
+			return 0;
+
+		read_reg(ctlr.opmenu, opmenu, sizeof(opmenu));
+		for (opcode_index = 0; opcode_index < ctlr.menubytes;
+				opcode_index++) {
+			if (opmenu[opcode_index] == trans->opcode)
+				break;
+		}
+
+		if (opcode_index == ctlr.menubytes) {
+			printf("ICH SPI: Opcode %x not found\n",
+			       trans->opcode);
+			return -1;
+		}
+
+		optypes = ich_readw(ctlr.optype);
+		optype = (optypes >> (opcode_index * 2)) & 0x3;
+		if (trans->type == SPI_OPCODE_TYPE_WRITE_NO_ADDRESS &&
+		    optype == SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS &&
+		    trans->bytesout >= 3) {
+			/* We guessed wrong earlier. Fix it up. */
+			trans->type = optype;
+		}
+		if (optype != trans->type) {
+			printf("ICH SPI: Transaction doesn't fit type %d\n",
+			       optype);
+			return -1;
+		}
+		return opcode_index;
+	}
+}
+
+static int spi_setup_offset(struct spi_trans *trans)
+{
+	/* Separate the SPI address and data. */
+	switch (trans->type) {
+	case SPI_OPCODE_TYPE_READ_NO_ADDRESS:
+	case SPI_OPCODE_TYPE_WRITE_NO_ADDRESS:
+		return 0;
+	case SPI_OPCODE_TYPE_READ_WITH_ADDRESS:
+	case SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS:
+		trans->offset = ((uint32_t)trans->out[0] << 16) |
+				((uint32_t)trans->out[1] << 8) |
+				((uint32_t)trans->out[2] << 0);
+		spi_use_out(trans, 3);
+		return 1;
+	default:
+		printf("Unrecognized SPI transaction type %#x\n", trans->type);
+		return -1;
+	}
+}
+
+/*
+ * Wait for up to 6s til status register bit(s) turn 1 (in case wait_til_set
+ * below is True) or 0. In case the wait was for the bit(s) to set - write
+ * those bits back, which would cause resetting them.
+ *
+ * Return the last read status value on success or -1 on failure.
+ */
+static int ich_status_poll(u16 bitmask, int wait_til_set)
+{
+	int timeout = 600000; /* This will result in 6s */
+	u16 status = 0;
+
+	while (timeout--) {
+		status = ich_readw(ctlr.status);
+		if (wait_til_set ^ ((status & bitmask) == 0)) {
+			if (wait_til_set)
+				ich_writew((status & bitmask), ctlr.status);
+			return status;
+		}
+		udelay(10);
+	}
+
+	printf("ICH SPI: SCIP timeout, read %x, expected %x\n",
+	       status, bitmask);
+	return -1;
+}
+
+/*
+int spi_xfer(struct spi_slave *slave, const void *dout,
+		unsigned int bitsout, void *din, unsigned int bitsin)
+*/
+int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
+		void *din, unsigned long flags)
+{
+	struct ich_spi_slave *ich = to_ich_spi(slave);
+	uint16_t control;
+	int16_t opcode_index;
+	int with_address;
+	int status;
+	int bytes = bitlen / 8;
+	struct spi_trans *trans = &ich->trans;
+	unsigned type = flags & (SPI_XFER_BEGIN | SPI_XFER_END);
+	int using_cmd = 0;
+	/* Align read transactions to 64-byte boundaries */
+	char buff[ctlr.databytes];
+
+	/* Ee don't support writing partial bytes. */
+	if (bitlen % 8) {
+		debug("ICH SPI: Accessing partial bytes not supported\n");
+		return -1;
+	}
+
+	/* An empty end transaction can be ignored */
+	if (type == SPI_XFER_END && !dout && !din)
+		return 0;
+
+	if (type & SPI_XFER_BEGIN)
+		memset(trans, '\0', sizeof(*trans));
+
+	/* Dp we need to come back later to finish it? */
+	if (dout && type == SPI_XFER_BEGIN) {
+		if (bytes > ICH_MAX_CMD_LEN) {
+			debug("ICH SPI: Command length limit exceeded\n");
+			return -1;
+		}
+		memcpy(trans->cmd, dout, bytes);
+		trans->cmd_len = bytes;
+		debug("ICH SPI: Saved %d bytes\n", bytes);
+		return 0;
+	}
+
+	/*
+	 * We process a 'middle' spi_xfer() call, which has no
+	 * SPI_XFER_BEGIN/END, as an independent transaction as if it had
+	 * an end. We therefore repeat the command. This is because ICH
+	 * seems to have no support for this, or because interest (in digging
+	 * out the details and creating a special case in the code) is low.
+	 */
+	if (trans->cmd_len) {
+		trans->out = trans->cmd;
+		trans->bytesout = trans->cmd_len;
+		using_cmd = 1;
+		debug("ICH SPI: Using %d bytes\n", trans->cmd_len);
+	} else {
+		trans->out = dout;
+		trans->bytesout = dout ? bytes : 0;
+	}
+
+	trans->in = din;
+	trans->bytesin = din ? bytes : 0;
+
+	/* There has to always at least be an opcode. */
+	if (!trans->bytesout) {
+		debug("ICH SPI: No opcode for transfer\n");
+		return -1;
+	}
+
+	if (ich_status_poll(SPIS_SCIP, 0) == -1)
+		return -1;
+
+	ich_writew(SPIS_CDS | SPIS_FCERR, ctlr.status);
+
+	spi_setup_type(trans, using_cmd ? bytes : 0);
+	opcode_index = spi_setup_opcode(trans);
+	if (opcode_index < 0)
+		return -1;
+	with_address = spi_setup_offset(trans);
+	if (with_address < 0)
+		return -1;
+
+	if (trans->opcode == SPI_OPCODE_WREN) {
+		/*
+		 * Treat Write Enable as Atomic Pre-Op if possible
+		 * in order to prevent the Management Engine from
+		 * issuing a transaction between WREN and DATA.
+		 */
+		if (!ctlr.ichspi_lock)
+			ich_writew(trans->opcode, ctlr.preop);
+		return 0;
+	}
+
+	if (ctlr.speed && ctlr.max_speed >= 33000000) {
+		int byte;
+
+		byte = ich_readb(ctlr.speed);
+		if (ich->speed >= 33000000)
+			byte |= SSFC_SCF_33MHZ;
+		else
+			byte &= ~SSFC_SCF_33MHZ;
+		ich_writeb(byte, ctlr.speed);
+	}
+
+	/* See if we have used up the command data */
+	if (using_cmd && dout && bytes) {
+		trans->out = dout;
+		trans->bytesout = bytes;
+		debug("ICH SPI: Moving to data, %d bytes\n", bytes);
+	}
+
+	/* Preset control fields */
+	control = ich_readw(ctlr.control);
+	control &= ~SSFC_RESERVED;
+	control = SPIC_SCGO | ((opcode_index & 0x07) << 4);
+
+	/* Issue atomic preop cycle if needed */
+	if (ich_readw(ctlr.preop))
+		control |= SPIC_ACS;
+
+	if (!trans->bytesout && !trans->bytesin) {
+		/* SPI addresses are 24 bit only */
+		if (with_address)
+			ich_writel(trans->offset & 0x00FFFFFF, ctlr.addr);
+
+		/*
+		 * This is a 'no data' command (like Write Enable), its
+		 * bitesout size was 1, decremented to zero while executing
+		 * spi_setup_opcode() above. Tell the chip to send the
+		 * command.
+		 */
+		ich_writew(control, ctlr.control);
+
+		/* wait for the result */
+		status = ich_status_poll(SPIS_CDS | SPIS_FCERR, 1);
+		if (status == -1)
+			return -1;
+
+		if (status & SPIS_FCERR) {
+			debug("ICH SPI: Command transaction error\n");
+			return -1;
+		}
+
+		return 0;
+	}
+
+	/*
+	 * Check if this is a write command atempting to transfer more bytes
+	 * than the controller can handle. Iterations for writes are not
+	 * supported here because each SPI write command needs to be preceded
+	 * and followed by other SPI commands, and this sequence is controlled
+	 * by the SPI chip driver.
+	 */
+	if (trans->bytesout > ctlr.databytes) {
+		debug("ICH SPI: Too much to write. This should be prevented by the driver's max_write_size?\n");
+		return -1;
+	}
+
+	/*
+	 * Read or write up to databytes bytes at a time until everything has
+	 * been sent.
+	 */
+	while (trans->bytesout || trans->bytesin) {
+		uint32_t data_length;
+		uint32_t aligned_offset;
+		uint32_t diff;
+
+		aligned_offset = trans->offset & ~(ctlr.databytes - 1);
+		diff = trans->offset - aligned_offset;
+
+		/* SPI addresses are 24 bit only */
+		ich_writel(aligned_offset & 0x00FFFFFF, ctlr.addr);
+
+		if (trans->bytesout)
+			data_length = min(trans->bytesout, ctlr.databytes);
+		else
+			data_length = min(trans->bytesin, ctlr.databytes);
+
+		/* Program data into FDATA0 to N */
+		if (trans->bytesout) {
+			write_reg(trans->out, ctlr.data, data_length);
+			spi_use_out(trans, data_length);
+			if (with_address)
+				trans->offset += data_length;
+		}
+
+		/* Add proper control fields' values */
+		control &= ~((ctlr.databytes - 1) << 8);
+		control |= SPIC_DS;
+		control |= (data_length - 1) << 8;
+
+		/* write it */
+		ich_writew(control, ctlr.control);
+
+		/* Wait for Cycle Done Status or Flash Cycle Error. */
+		status = ich_status_poll(SPIS_CDS | SPIS_FCERR, 1);
+		if (status == -1)
+			return -1;
+
+		if (status & SPIS_FCERR) {
+			debug("ICH SPI: Data transaction error\n");
+			return -1;
+		}
+
+		if (trans->bytesin) {
+			if (diff) {
+				data_length -= diff;
+				read_reg(ctlr.data, buff, ctlr.databytes);
+				memcpy(trans->in, buff + diff, data_length);
+			} else {
+				read_reg(ctlr.data, trans->in, data_length);
+			}
+			spi_use_in(trans, data_length);
+			if (with_address)
+				trans->offset += data_length;
+		}
+	}
+
+	/* Clear atomic preop now that xfer is done */
+	ich_writew(0, ctlr.preop);
+
+	return 0;
+}
+
+
+/*
+ * This uses the SPI controller from the Intel Cougar Point and Panther Point
+ * PCH to write-protect portions of the SPI flash until reboot. The changes
+ * don't actually take effect until the HSFS[FLOCKDN] bit is set, but that's
+ * done elsewhere.
+ */
+int spi_write_protect_region(uint32_t lower_limit, uint32_t length, int hint)
+{
+	uint32_t tmplong;
+	uint32_t upper_limit;
+
+	if (!ctlr.pr) {
+		printf("%s: operation not supported on this chipset\n",
+		       __func__);
+		return -1;
+	}
+
+	if (length == 0 ||
+	    lower_limit > (0xFFFFFFFFUL - length) + 1 ||
+	    hint < 0 || hint > 4) {
+		printf("%s(0x%x, 0x%x, %d): invalid args\n", __func__,
+		       lower_limit, length, hint);
+		return -1;
+	}
+
+	upper_limit = lower_limit + length - 1;
+
+	/*
+	 * Determine bits to write, as follows:
+	 *  31     Write-protection enable (includes erase operation)
+	 *  30:29  reserved
+	 *  28:16  Upper Limit (FLA address bits 24:12, with 11:0 == 0xfff)
+	 *  15     Read-protection enable
+	 *  14:13  reserved
+	 *  12:0   Lower Limit (FLA address bits 24:12, with 11:0 == 0x000)
+	 */
+	tmplong = 0x80000000 |
+		((upper_limit & 0x01fff000) << 4) |
+		((lower_limit & 0x01fff000) >> 12);
+
+	printf("%s: writing 0x%08x to %p\n", __func__, tmplong,
+	       &ctlr.pr[hint]);
+	ctlr.pr[hint] = tmplong;
+
+	return 0;
+}
diff --git a/drivers/spi/ich.h b/drivers/spi/ich.h
new file mode 100644
index 0000000..bd7bc12
--- /dev/null
+++ b/drivers/spi/ich.h
@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * This file is derived from the flashrom project.
+ */
+
+struct ich7_spi_regs {
+	uint16_t spis;
+	uint16_t spic;
+	uint32_t spia;
+	uint64_t spid[8];
+	uint64_t _pad;
+	uint32_t bbar;
+	uint16_t preop;
+	uint16_t optype;
+	uint8_t opmenu[8];
+} __packed;
+
+struct ich9_spi_regs {
+	uint32_t bfpr;			/* 0x00 */
+	uint16_t hsfs;
+	uint16_t hsfc;
+	uint32_t faddr;
+	uint32_t _reserved0;
+	uint32_t fdata[16];		/* 0x10 */
+	uint32_t frap;			/* 0x50 */
+	uint32_t freg[5];
+	uint32_t _reserved1[3];
+	uint32_t pr[5];			/* 0x74 */
+	uint32_t _reserved2[2];
+	uint8_t ssfs;			/* 0x90 */
+	uint8_t ssfc[3];
+	uint16_t preop;			/* 0x94 */
+	uint16_t optype;
+	uint8_t opmenu[8];		/* 0x98 */
+	uint32_t bbar;
+	uint8_t _reserved3[12];
+	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;
+} __packed;
+
+enum {
+	SPIS_SCIP =		0x0001,
+	SPIS_GRANT =		0x0002,
+	SPIS_CDS =		0x0004,
+	SPIS_FCERR =		0x0008,
+	SSFS_AEL =		0x0010,
+	SPIS_LOCK =		0x8000,
+	SPIS_RESERVED_MASK =	0x7ff0,
+	SSFS_RESERVED_MASK =	0x7fe2
+};
+
+enum {
+	SPIC_SCGO =		0x000002,
+	SPIC_ACS =		0x000004,
+	SPIC_SPOP =		0x000008,
+	SPIC_DBC =		0x003f00,
+	SPIC_DS =		0x004000,
+	SPIC_SME =		0x008000,
+	SSFC_SCF_MASK =		0x070000,
+	SSFC_RESERVED =		0xf80000,
+
+	/* Mask for speed byte, biuts 23:16 of SSFC */
+	SSFC_SCF_33MHZ	=	0x01,
+};
+
+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
+};
+
+enum {
+	SPI_OPCODE_TYPE_READ_NO_ADDRESS =	0,
+	SPI_OPCODE_TYPE_WRITE_NO_ADDRESS =	1,
+	SPI_OPCODE_TYPE_READ_WITH_ADDRESS =	2,
+	SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS =	3
+};
+
+enum {
+	ICH_MAX_CMD_LEN		= 5,
+};
+
+struct spi_trans {
+	uint8_t cmd[ICH_MAX_CMD_LEN];
+	int cmd_len;
+	const uint8_t *out;
+	uint32_t bytesout;
+	uint8_t *in;
+	uint32_t bytesin;
+	uint8_t type;
+	uint8_t opcode;
+	uint32_t offset;
+};
+
+struct ich_spi_slave {
+	struct spi_slave slave;
+	struct spi_trans trans;	/* current transaction in progress */
+	int speed;		/* SPI speed in Hz */
+};
diff --git a/drivers/spi/kirkwood_spi.c b/drivers/spi/kirkwood_spi.c
index de81064..caa91e3 100644
--- a/drivers/spi/kirkwood_spi.c
+++ b/drivers/spi/kirkwood_spi.c
@@ -49,13 +49,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	if (!spi_cs_is_valid(bus, cs))
 		return NULL;
 
-	slave = malloc(sizeof(struct spi_slave));
+	slave = spi_alloc_slave_base(bus, cs);
 	if (!slave)
 		return NULL;
 
-	slave->bus = bus;
-	slave->cs = cs;
-
 	writel(~KWSPI_CSN_ACT | KWSPI_SMEMRDY, &spireg->ctrl);
 
 	/* calculate spi clock prescaller using max_hz */
diff --git a/drivers/spi/mpc52xx_spi.c b/drivers/spi/mpc52xx_spi.c
index 3e96b3f..4b50bca 100644
--- a/drivers/spi/mpc52xx_spi.c
+++ b/drivers/spi/mpc52xx_spi.c
@@ -48,13 +48,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 {
 	struct spi_slave *slave;
 
-	slave = malloc(sizeof(struct spi_slave));
+	slave = spi_alloc_slave_base(bus, cs);
 	if (!slave)
 		return NULL;
 
-	slave->bus = bus;
-	slave->cs = cs;
-
 	return slave;
 }
 
diff --git a/drivers/spi/mpc8xxx_spi.c b/drivers/spi/mpc8xxx_spi.c
index 4e46041..6b0e3b4 100644
--- a/drivers/spi/mpc8xxx_spi.c
+++ b/drivers/spi/mpc8xxx_spi.c
@@ -45,13 +45,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	if (!spi_cs_is_valid(bus, cs))
 		return NULL;
 
-	slave = malloc(sizeof(struct spi_slave));
+	slave = spi_alloc_slave_base(bus, cs);
 	if (!slave)
 		return NULL;
 
-	slave->bus = bus;
-	slave->cs = cs;
-
 	/*
 	 * TODO: Some of the code in spi_init() should probably move
 	 * here, or into spi_claim_bus() below.
diff --git a/drivers/spi/mxc_spi.c b/drivers/spi/mxc_spi.c
index 859c43f..d792d8d 100644
--- a/drivers/spi/mxc_spi.c
+++ b/drivers/spi/mxc_spi.c
@@ -408,7 +408,7 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	if (bus >= ARRAY_SIZE(spi_bases))
 		return NULL;
 
-	mxcs = calloc(sizeof(struct mxc_spi_slave), 1);
+	mxcs = spi_alloc_slave(struct mxc_spi_slave, bus, cs);
 	if (!mxcs) {
 		puts("mxc_spi: SPI Slave not allocated !\n");
 		return NULL;
@@ -424,8 +424,6 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 
 	cs = ret;
 
-	mxcs->slave.bus = bus;
-	mxcs->slave.cs = cs;
 	mxcs->base = spi_bases[bus];
 
 	ret = spi_cfg_mxc(mxcs, cs, max_hz, mode);
diff --git a/drivers/spi/mxs_spi.c b/drivers/spi/mxs_spi.c
index ffa3c1d..aa999f9 100644
--- a/drivers/spi/mxs_spi.c
+++ b/drivers/spi/mxs_spi.c
@@ -77,15 +77,13 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 		return NULL;
 	}
 
-	mxs_slave = calloc(sizeof(struct mxs_spi_slave), 1);
+	mxs_slave = spi_alloc_slave(struct mxs_spi_slave, bus, cs);
 	if (!mxs_slave)
 		return NULL;
 
 	if (mxs_dma_init_channel(MXS_DMA_CHANNEL_AHB_APBH_SSP0 + bus))
 		goto err_init;
 
-	mxs_slave->slave.bus = bus;
-	mxs_slave->slave.cs = cs;
 	mxs_slave->max_khz = max_hz / 1000;
 	mxs_slave->mode = mode;
 	mxs_slave->regs = mxs_ssp_regs_by_bus(bus);
diff --git a/drivers/spi/oc_tiny_spi.c b/drivers/spi/oc_tiny_spi.c
index fc01fb8..6f7b1ed 100644
--- a/drivers/spi/oc_tiny_spi.c
+++ b/drivers/spi/oc_tiny_spi.c
@@ -90,13 +90,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	if (!spi_cs_is_valid(bus, cs) || gpio_request(cs, "tiny_spi"))
 		return NULL;
 
-	tiny_spi = malloc(sizeof(*tiny_spi));
+	tiny_spi = spi_alloc_slave(struct tiny_spi_slave, bus, cs);
 	if (!tiny_spi)
 		return NULL;
-	memset(tiny_spi, 0, sizeof(*tiny_spi));
 
-	tiny_spi->slave.bus = bus;
-	tiny_spi->slave.cs = cs;
 	tiny_spi->host = &tiny_spi_host_list[bus];
 	tiny_spi->mode = mode & (SPI_CPOL | SPI_CPHA);
 	tiny_spi->flg = mode & SPI_CS_HIGH ? 1 : 0;
diff --git a/drivers/spi/omap3_spi.c b/drivers/spi/omap3_spi.c
index 344d5b8..80a4e47 100644
--- a/drivers/spi/omap3_spi.c
+++ b/drivers/spi/omap3_spi.c
@@ -80,12 +80,7 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 				  unsigned int max_hz, unsigned int mode)
 {
 	struct omap3_spi_slave	*ds;
-
-	ds = malloc(sizeof(struct omap3_spi_slave));
-	if (!ds) {
-		printf("SPI error: malloc of SPI structure failed\n");
-		return NULL;
-	}
+	struct mcspi *regs;
 
 	/*
 	 * OMAP3 McSPI (MultiChannel SPI) has 4 busses (modules)
@@ -98,21 +93,21 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 
 	switch (bus) {
 	case 0:
-		ds->regs = (struct mcspi *)OMAP3_MCSPI1_BASE;
+		regs = (struct mcspi *)OMAP3_MCSPI1_BASE;
 		break;
 #ifdef OMAP3_MCSPI2_BASE
 	case 1:
-		ds->regs = (struct mcspi *)OMAP3_MCSPI2_BASE;
+		regs = (struct mcspi *)OMAP3_MCSPI2_BASE;
 		break;
 #endif
 #ifdef OMAP3_MCSPI3_BASE 
 	case 2:
-		ds->regs = (struct mcspi *)OMAP3_MCSPI3_BASE;
+		regs = (struct mcspi *)OMAP3_MCSPI3_BASE;
 		break;
 #endif
 #ifdef OMAP3_MCSPI4_BASE
 	case 3:
-		ds->regs = (struct mcspi *)OMAP3_MCSPI4_BASE;
+		regs = (struct mcspi *)OMAP3_MCSPI4_BASE;
 		break;
 #endif
 	default:
@@ -120,7 +115,6 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 			Supported busses 0 - 3\n", bus);
 		return NULL;
 	}
-	ds->slave.bus = bus;
 
 	if (((bus == 0) && (cs > 3)) ||
 			((bus == 1) && (cs > 1)) ||
@@ -130,19 +124,26 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 			on bus %i\n", cs, bus);
 		return NULL;
 	}
-	ds->slave.cs = cs;
 
 	if (max_hz > OMAP3_MCSPI_MAX_FREQ) {
 		printf("SPI error: unsupported frequency %i Hz. \
 			Max frequency is 48 Mhz\n", max_hz);
 		return NULL;
 	}
-	ds->freq = max_hz;
 
 	if (mode > SPI_MODE_3) {
 		printf("SPI error: unsupported SPI mode %i\n", mode);
 		return NULL;
 	}
+
+	ds = spi_alloc_slave(struct omap3_spi_slave, bus, cs);
+	if (!ds) {
+		printf("SPI error: malloc of SPI structure failed\n");
+		return NULL;
+	}
+
+	ds->regs = regs;
+	ds->freq = max_hz;
 	ds->mode = mode;
 
 	return &ds->slave;
diff --git a/drivers/spi/sh_spi.c b/drivers/spi/sh_spi.c
index e944b23..744afe3 100644
--- a/drivers/spi/sh_spi.c
+++ b/drivers/spi/sh_spi.c
@@ -103,12 +103,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	if (!spi_cs_is_valid(bus, cs))
 		return NULL;
 
-	ss = malloc(sizeof(struct spi_slave));
+	ss = spi_alloc_slave(struct sh_spi, bus, cs);
 	if (!ss)
 		return NULL;
 
-	ss->slave.bus = bus;
-	ss->slave.cs = cs;
 	ss->regs = (struct sh_spi_regs *)CONFIG_SH_SPI_BASE;
 
 	/* SPI sycle stop */
diff --git a/drivers/spi/soft_spi.c b/drivers/spi/soft_spi.c
index 13df8cb..a1b84b6 100644
--- a/drivers/spi/soft_spi.c
+++ b/drivers/spi/soft_spi.c
@@ -73,12 +73,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	if (!spi_cs_is_valid(bus, cs))
 		return NULL;
 
-	ss = malloc(sizeof(struct soft_spi_slave));
+	ss = spi_alloc_slave(struct soft_spi_slave, bus, cs);
 	if (!ss)
 		return NULL;
 
-	ss->slave.bus = bus;
-	ss->slave.cs = cs;
 	ss->mode = mode;
 
 	/* TODO: Use max_hz to limit the SCK rate */
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
new file mode 100644
index 0000000..cb36c5e
--- /dev/null
+++ b/drivers/spi/spi.c
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ *
+ * 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.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <spi.h>
+
+void *spi_do_alloc_slave(int offset, int size, unsigned int bus,
+			 unsigned int cs)
+{
+	struct spi_slave *slave;
+	void *ptr;
+
+	ptr = malloc(size);
+	if (ptr) {
+		memset(ptr, '\0', size);
+		slave = (struct spi_slave *)(ptr + offset);
+		slave->bus = bus;
+		slave->cs = cs;
+	}
+
+	return ptr;
+}
diff --git a/drivers/spi/tegra_slink.c b/drivers/spi/tegra_slink.c
index 2c41fab..9da5877 100644
--- a/drivers/spi/tegra_slink.c
+++ b/drivers/spi/tegra_slink.c
@@ -81,13 +81,11 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 		return NULL;
 	}
 
-	spi = malloc(sizeof(struct tegra_spi_slave));
+	spi = spi_alloc_slave(struct tegra_spi_slave, bus, cs);
 	if (!spi) {
 		printf("SPI error: malloc of SPI structure failed\n");
 		return NULL;
 	}
-	spi->slave.bus = bus;
-	spi->slave.cs = cs;
 	spi->ctrl = &spi_ctrls[bus];
 	if (!spi->ctrl) {
 		printf("SPI error: could not find controller for bus %d\n",
diff --git a/drivers/spi/tegra_spi.c b/drivers/spi/tegra_spi.c
index ce19095..05027af 100644
--- a/drivers/spi/tegra_spi.c
+++ b/drivers/spi/tegra_spi.c
@@ -81,13 +81,11 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 		return NULL;
 	}
 
-	spi = malloc(sizeof(struct tegra_spi_slave));
+	spi = spi_alloc_slave(struct tegra_spi_slave, bus, cs);
 	if (!spi) {
 		printf("SPI error: malloc of SPI structure failed\n");
 		return NULL;
 	}
-	spi->slave.bus = bus;
-	spi->slave.cs = cs;
 #ifdef CONFIG_OF_CONTROL
 	int node = fdtdec_next_compatible(gd->fdt_blob, 0,
 					  COMPAT_NVIDIA_TEGRA20_SFLASH);
diff --git a/drivers/spi/xilinx_spi.c b/drivers/spi/xilinx_spi.c
index db01cc2..a82b056 100644
--- a/drivers/spi/xilinx_spi.c
+++ b/drivers/spi/xilinx_spi.c
@@ -85,14 +85,12 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 		return NULL;
 	}
 
-	xilspi = malloc(sizeof(*xilspi));
+	xilspi = spi_alloc_slave(struct xilinx_spi_slave, bus, cs);
 	if (!xilspi) {
 		printf("XILSPI error: %s: malloc of SPI structure failed\n",
 				__func__);
 		return NULL;
 	}
-	xilspi->slave.bus = bus;
-	xilspi->slave.cs = cs;
 	xilspi->regs = (struct xilinx_spi_reg *)xilinx_spi_base_list[bus];
 	xilspi->freq = max_hz;
 	xilspi->mode = mode;