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

9 files changed, 738 insertions, 12 deletions

diff --git a/drivers/misc/cros_ec_spi.c b/drivers/misc/cros_ec_spi.c
index 202acf2..2fc9110 100644
--- a/drivers/misc/cros_ec_spi.c
+++ b/drivers/misc/cros_ec_spi.c
@@ -135,8 +135,7 @@ int cros_ec_spi_decode_fdt(struct cros_ec_dev *dev, const void *blob)
  */
 int cros_ec_spi_init(struct cros_ec_dev *dev, const void *blob)
 {
-	dev->spi = spi_setup_slave_fdt(blob, dev->parent_node,
-				       dev->cs, dev->max_frequency, 0);
+	dev->spi = spi_setup_slave_fdt(blob, dev->parent_node, dev->node);
 	if (!dev->spi) {
 		debug("%s: Could not setup SPI slave\n", __func__);
 		return -1;
diff --git a/drivers/mtd/spi/Makefile b/drivers/mtd/spi/Makefile
index 1bbeb7d..26483a2 100644
--- a/drivers/mtd/spi/Makefile
+++ b/drivers/mtd/spi/Makefile
@@ -13,4 +13,5 @@ endif
 obj-$(CONFIG_CMD_SF)        += sf.o
 obj-$(CONFIG_SPI_FLASH) += sf_probe.o sf_ops.o
 obj-$(CONFIG_SPI_FRAM_RAMTRON) += ramtron.o
+obj-$(CONFIG_SPI_FLASH_SANDBOX) += sandbox.o
 obj-$(CONFIG_SPI_M95XXX) += eeprom_m95xxx.o
diff --git a/drivers/mtd/spi/sandbox.c b/drivers/mtd/spi/sandbox.c
new file mode 100644
index 0000000..a62ef4c
--- /dev/null
+++ b/drivers/mtd/spi/sandbox.c
@@ -0,0 +1,483 @@
+/*
+ * Simulate a SPI flash
+ *
+ * Copyright (c) 2011-2013 The Chromium OS Authors.
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <spi.h>
+#include <os.h>
+
+#include <spi_flash.h>
+#include "sf_internal.h"
+
+#include <asm/getopt.h>
+#include <asm/spi.h>
+#include <asm/state.h>
+
+/*
+ * The different states that our SPI flash transitions between.
+ * We need to keep track of this across multiple xfer calls since
+ * the SPI bus could possibly call down into us multiple times.
+ */
+enum sandbox_sf_state {
+	SF_CMD,   /* default state -- we're awaiting a command */
+	SF_ID,    /* read the flash's (jedec) ID code */
+	SF_ADDR,  /* processing the offset in the flash to read/etc... */
+	SF_READ,  /* reading data from the flash */
+	SF_WRITE, /* writing data to the flash, i.e. page programming */
+	SF_ERASE, /* erase the flash */
+	SF_READ_STATUS, /* read the flash's status register */
+	SF_READ_STATUS1, /* read the flash's status register upper 8 bits*/
+};
+
+static const char *sandbox_sf_state_name(enum sandbox_sf_state state)
+{
+	static const char * const states[] = {
+		"CMD", "ID", "ADDR", "READ", "WRITE", "ERASE", "READ_STATUS",
+	};
+	return states[state];
+}
+
+/* Bits for the status register */
+#define STAT_WIP	(1 << 0)
+#define STAT_WEL	(1 << 1)
+
+/* Assume all SPI flashes have 3 byte addresses since they do atm */
+#define SF_ADDR_LEN	3
+
+struct sandbox_spi_flash_erase_commands {
+	u8 cmd;
+	u32 size;
+};
+#define IDCODE_LEN 5
+#define MAX_ERASE_CMDS 3
+struct sandbox_spi_flash_data {
+	const char *name;
+	u8 idcode[IDCODE_LEN];
+	u32 size;
+	const struct sandbox_spi_flash_erase_commands
+						erase_cmds[MAX_ERASE_CMDS];
+};
+
+/* Structure describing all the flashes we know how to emulate */
+static const struct sandbox_spi_flash_data sandbox_sf_flashes[] = {
+	{
+		"M25P16", { 0x20, 0x20, 0x15 }, (2 << 20),
+		{	/* erase commands */
+			{ 0xd8, (64 << 10), }, /* sector */
+			{ 0xc7, (2 << 20), }, /* bulk */
+		},
+	},
+	{
+		"W25Q32", { 0xef, 0x40, 0x16 }, (4 << 20),
+		{	/* erase commands */
+			{ 0x20, (4 << 10), }, /* 4KB */
+			{ 0xd8, (64 << 10), }, /* sector */
+			{ 0xc7, (4 << 20), }, /* bulk */
+		},
+	},
+	{
+		"W25Q128", { 0xef, 0x40, 0x18 }, (16 << 20),
+		{	/* erase commands */
+			{ 0x20, (4 << 10), }, /* 4KB */
+			{ 0xd8, (64 << 10), }, /* sector */
+			{ 0xc7, (16 << 20), }, /* bulk */
+		},
+	},
+};
+
+/* Used to quickly bulk erase backing store */
+static u8 sandbox_sf_0xff[0x1000];
+
+/* Internal state data for each SPI flash */
+struct sandbox_spi_flash {
+	/*
+	 * As we receive data over the SPI bus, our flash transitions
+	 * between states.  For example, we start off in the SF_CMD
+	 * state where the first byte tells us what operation to perform
+	 * (such as read or write the flash).  But the operation itself
+	 * can go through a few states such as first reading in the
+	 * offset in the flash to perform the requested operation.
+	 * Thus "state" stores the exact state that our machine is in
+	 * while "cmd" stores the overall command we're processing.
+	 */
+	enum sandbox_sf_state state;
+	uint cmd;
+	const void *cmd_data;
+	/* Current position in the flash; used when reading/writing/etc... */
+	uint off;
+	/* How many address bytes we've consumed */
+	uint addr_bytes, pad_addr_bytes;
+	/* The current flash status (see STAT_XXX defines above) */
+	u16 status;
+	/* Data describing the flash we're emulating */
+	const struct sandbox_spi_flash_data *data;
+	/* The file on disk to serv up data from */
+	int fd;
+};
+
+static int sandbox_sf_setup(void **priv, const char *spec)
+{
+	/* spec = idcode:file */
+	struct sandbox_spi_flash *sbsf;
+	const char *file;
+	size_t i, len, idname_len;
+	const struct sandbox_spi_flash_data *data;
+
+	file = strchr(spec, ':');
+	if (!file) {
+		printf("sandbox_sf: unable to parse file\n");
+		goto error;
+	}
+	idname_len = file - spec;
+	++file;
+
+	for (i = 0; i < ARRAY_SIZE(sandbox_sf_flashes); ++i) {
+		data = &sandbox_sf_flashes[i];
+		len = strlen(data->name);
+		if (idname_len != len)
+			continue;
+		if (!memcmp(spec, data->name, len))
+			break;
+	}
+	if (i == ARRAY_SIZE(sandbox_sf_flashes)) {
+		printf("sandbox_sf: unknown flash '%*s'\n", (int)idname_len,
+		       spec);
+		goto error;
+	}
+
+	if (sandbox_sf_0xff[0] == 0x00)
+		memset(sandbox_sf_0xff, 0xff, sizeof(sandbox_sf_0xff));
+
+	sbsf = calloc(sizeof(*sbsf), 1);
+	if (!sbsf) {
+		printf("sandbox_sf: out of memory\n");
+		goto error;
+	}
+
+	sbsf->fd = os_open(file, 02);
+	if (sbsf->fd == -1) {
+		free(sbsf);
+		printf("sandbox_sf: unable to open file '%s'\n", file);
+		goto error;
+	}
+
+	sbsf->data = data;
+
+	*priv = sbsf;
+	return 0;
+
+ error:
+	return 1;
+}
+
+static void sandbox_sf_free(void *priv)
+{
+	struct sandbox_spi_flash *sbsf = priv;
+
+	os_close(sbsf->fd);
+	free(sbsf);
+}
+
+static void sandbox_sf_cs_activate(void *priv)
+{
+	struct sandbox_spi_flash *sbsf = priv;
+
+	debug("sandbox_sf: CS activated; state is fresh!\n");
+
+	/* CS is asserted, so reset state */
+	sbsf->off = 0;
+	sbsf->addr_bytes = 0;
+	sbsf->pad_addr_bytes = 0;
+	sbsf->state = SF_CMD;
+	sbsf->cmd = SF_CMD;
+}
+
+static void sandbox_sf_cs_deactivate(void *priv)
+{
+	debug("sandbox_sf: CS deactivated; cmd done processing!\n");
+}
+
+/* Figure out what command this stream is telling us to do */
+static int sandbox_sf_process_cmd(struct sandbox_spi_flash *sbsf, const u8 *rx,
+				  u8 *tx)
+{
+	enum sandbox_sf_state oldstate = sbsf->state;
+
+	/* We need to output a byte for the cmd byte we just ate */
+	sandbox_spi_tristate(tx, 1);
+
+	sbsf->cmd = rx[0];
+	switch (sbsf->cmd) {
+	case CMD_READ_ID:
+		sbsf->state = SF_ID;
+		sbsf->cmd = SF_ID;
+		break;
+	case CMD_READ_ARRAY_FAST:
+		sbsf->pad_addr_bytes = 1;
+	case CMD_READ_ARRAY_SLOW:
+	case CMD_PAGE_PROGRAM:
+ state_addr:
+		sbsf->state = SF_ADDR;
+		break;
+	case CMD_WRITE_DISABLE:
+		debug(" write disabled\n");
+		sbsf->status &= ~STAT_WEL;
+		break;
+	case CMD_READ_STATUS:
+		sbsf->state = SF_READ_STATUS;
+		break;
+	case CMD_READ_STATUS1:
+		sbsf->state = SF_READ_STATUS1;
+		break;
+	case CMD_WRITE_ENABLE:
+		debug(" write enabled\n");
+		sbsf->status |= STAT_WEL;
+		break;
+	default: {
+		size_t i;
+
+		/* handle erase commands first */
+		for (i = 0; i < MAX_ERASE_CMDS; ++i) {
+			const struct sandbox_spi_flash_erase_commands *
+				erase_cmd = &sbsf->data->erase_cmds[i];
+
+			if (erase_cmd->cmd == 0x00)
+				continue;
+			if (sbsf->cmd != erase_cmd->cmd)
+				continue;
+
+			sbsf->cmd_data = erase_cmd;
+			goto state_addr;
+		}
+
+		debug(" cmd unknown: %#x\n", sbsf->cmd);
+		return 1;
+	}
+	}
+
+	if (oldstate != sbsf->state)
+		debug(" cmd: transition to %s state\n",
+		      sandbox_sf_state_name(sbsf->state));
+
+	return 0;
+}
+
+int sandbox_erase_part(struct sandbox_spi_flash *sbsf, int size)
+{
+	int todo;
+	int ret;
+
+	while (size > 0) {
+		todo = min(size, sizeof(sandbox_sf_0xff));
+		ret = os_write(sbsf->fd, sandbox_sf_0xff, todo);
+		if (ret != todo)
+			return ret;
+		size -= todo;
+	}
+
+	return 0;
+}
+
+static int sandbox_sf_xfer(void *priv, const u8 *rx, u8 *tx,
+		uint bytes)
+{
+	struct sandbox_spi_flash *sbsf = priv;
+	uint cnt, pos = 0;
+	int ret;
+
+	debug("sandbox_sf: state:%x(%s) bytes:%u\n", sbsf->state,
+	      sandbox_sf_state_name(sbsf->state), bytes);
+
+	if (sbsf->state == SF_CMD) {
+		/* Figure out the initial state */
+		if (sandbox_sf_process_cmd(sbsf, rx, tx))
+			return 1;
+		++pos;
+	}
+
+	/* Process the remaining data */
+	while (pos < bytes) {
+		switch (sbsf->state) {
+		case SF_ID: {
+			u8 id;
+
+			debug(" id: off:%u tx:", sbsf->off);
+			if (sbsf->off < IDCODE_LEN)
+				id = sbsf->data->idcode[sbsf->off];
+			else
+				id = 0;
+			debug("%02x\n", id);
+			tx[pos++] = id;
+			++sbsf->off;
+			break;
+		}
+		case SF_ADDR:
+			debug(" addr: bytes:%u rx:%02x ", sbsf->addr_bytes,
+			      rx[pos]);
+
+			if (sbsf->addr_bytes++ < SF_ADDR_LEN)
+				sbsf->off = (sbsf->off << 8) | rx[pos];
+			debug("addr:%06x\n", sbsf->off);
+
+			sandbox_spi_tristate(&tx[pos++], 1);
+
+			/* See if we're done processing */
+			if (sbsf->addr_bytes <
+					SF_ADDR_LEN + sbsf->pad_addr_bytes)
+				break;
+
+			/* Next state! */
+			if (os_lseek(sbsf->fd, sbsf->off, OS_SEEK_SET) < 0) {
+				puts("sandbox_sf: os_lseek() failed");
+				return 1;
+			}
+			switch (sbsf->cmd) {
+			case CMD_READ_ARRAY_FAST:
+			case CMD_READ_ARRAY_SLOW:
+				sbsf->state = SF_READ;
+				break;
+			case CMD_PAGE_PROGRAM:
+				sbsf->state = SF_WRITE;
+				break;
+			default:
+				/* assume erase state ... */
+				sbsf->state = SF_ERASE;
+				goto case_sf_erase;
+			}
+			debug(" cmd: transition to %s state\n",
+			      sandbox_sf_state_name(sbsf->state));
+			break;
+		case SF_READ:
+			/*
+			 * XXX: need to handle exotic behavior:
+			 *      - reading past end of device
+			 */
+
+			cnt = bytes - pos;
+			debug(" tx: read(%u)\n", cnt);
+			ret = os_read(sbsf->fd, tx + pos, cnt);
+			if (ret < 0) {
+				puts("sandbox_spi: os_read() failed\n");
+				return 1;
+			}
+			pos += ret;
+			break;
+		case SF_READ_STATUS:
+			debug(" read status: %#x\n", sbsf->status);
+			cnt = bytes - pos;
+			memset(tx + pos, sbsf->status, cnt);
+			pos += cnt;
+			break;
+		case SF_READ_STATUS1:
+			debug(" read status: %#x\n", sbsf->status);
+			cnt = bytes - pos;
+			memset(tx + pos, sbsf->status >> 8, cnt);
+			pos += cnt;
+			break;
+		case SF_WRITE:
+			/*
+			 * XXX: need to handle exotic behavior:
+			 *      - unaligned addresses
+			 *      - more than a page (256) worth of data
+			 *      - reading past end of device
+			 */
+			if (!(sbsf->status & STAT_WEL)) {
+				puts("sandbox_sf: write enable not set before write\n");
+				goto done;
+			}
+
+			cnt = bytes - pos;
+			debug(" rx: write(%u)\n", cnt);
+			sandbox_spi_tristate(&tx[pos], cnt);
+			ret = os_write(sbsf->fd, rx + pos, cnt);
+			if (ret < 0) {
+				puts("sandbox_spi: os_write() failed\n");
+				return 1;
+			}
+			pos += ret;
+			sbsf->status &= ~STAT_WEL;
+			break;
+		case SF_ERASE:
+ case_sf_erase: {
+			const struct sandbox_spi_flash_erase_commands *
+						erase_cmd = sbsf->cmd_data;
+
+			if (!(sbsf->status & STAT_WEL)) {
+				puts("sandbox_sf: write enable not set before erase\n");
+				goto done;
+			}
+
+			/* verify address is aligned */
+			if (sbsf->off & (erase_cmd->size - 1)) {
+				debug(" sector erase: cmd:%#x needs align:%#x, but we got %#x\n",
+				      erase_cmd->cmd, erase_cmd->size,
+				      sbsf->off);
+				sbsf->status &= ~STAT_WEL;
+				goto done;
+			}
+
+			debug(" sector erase addr: %u\n", sbsf->off);
+
+			cnt = bytes - pos;
+			sandbox_spi_tristate(&tx[pos], cnt);
+			pos += cnt;
+
+			/*
+			 * TODO(vapier@gentoo.org): latch WIP in status, and
+			 * delay before clearing it ?
+			 */
+			ret = sandbox_erase_part(sbsf, erase_cmd->size);
+			sbsf->status &= ~STAT_WEL;
+			if (ret) {
+				debug("sandbox_sf: Erase failed\n");
+				goto done;
+			}
+			goto done;
+		}
+		default:
+			debug(" ??? no idea what to do ???\n");
+			goto done;
+		}
+	}
+
+ done:
+	return pos == bytes ? 0 : 1;
+}
+
+static const struct sandbox_spi_emu_ops sandbox_sf_ops = {
+	.setup         = sandbox_sf_setup,
+	.free          = sandbox_sf_free,
+	.cs_activate   = sandbox_sf_cs_activate,
+	.cs_deactivate = sandbox_sf_cs_deactivate,
+	.xfer          = sandbox_sf_xfer,
+};
+
+static int sandbox_cmdline_cb_spi_sf(struct sandbox_state *state,
+				     const char *arg)
+{
+	unsigned long bus, cs;
+	const char *spec = sandbox_spi_parse_spec(arg, &bus, &cs);
+
+	if (!spec)
+		return 1;
+
+	/*
+	 * It is safe to not make a copy of 'spec' because it comes from the
+	 * command line.
+	 *
+	 * TODO(sjg@chromium.org): It would be nice if we could parse the
+	 * spec here, but the problem is that no U-Boot init has been done
+	 * yet. Perhaps we can figure something out.
+	 */
+	state->spi[bus][cs].ops = &sandbox_sf_ops;
+	state->spi[bus][cs].spec = spec;
+	return 0;
+}
+SANDBOX_CMDLINE_OPT(spi_sf, 1, "connect a SPI flash: <bus>:<cs>:<id>:<file>");
diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h
index 732ddf8..d291746 100644
--- a/drivers/mtd/spi/sf_internal.h
+++ b/drivers/mtd/spi/sf_internal.h
@@ -28,6 +28,7 @@
 #define CMD_PAGE_PROGRAM		0x02
 #define CMD_WRITE_DISABLE		0x04
 #define CMD_READ_STATUS			0x05
+#define CMD_READ_STATUS1		0x35
 #define CMD_WRITE_ENABLE		0x06
 #define CMD_READ_CONFIG			0x35
 #define CMD_FLAG_STATUS			0x70
diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c
index 5eb8ffe..c1eb754 100644
--- a/drivers/mtd/spi/sf_probe.c
+++ b/drivers/mtd/spi/sf_probe.c
@@ -13,6 +13,7 @@
 #include <malloc.h>
 #include <spi.h>
 #include <spi_flash.h>
+#include <asm/io.h>
 
 #include "sf_internal.h"
 
@@ -279,22 +280,19 @@ int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash)
 		debug("%s: Memory map must cover entire device\n", __func__);
 		return -1;
 	}
-	flash->memory_map = (void *)addr;
+	flash->memory_map = map_sysmem(addr, size);
 
 	return 0;
 }
 #endif /* CONFIG_OF_CONTROL */
 
-struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
-		unsigned int max_hz, unsigned int spi_mode)
+static struct spi_flash *spi_flash_probe_slave(struct spi_slave *spi)
 {
-	struct spi_slave *spi;
 	struct spi_flash *flash = NULL;
 	u8 idcode[5];
 	int ret;
 
 	/* Setup spi_slave */
-	spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
 	if (!spi) {
 		printf("SF: Failed to set up slave\n");
 		return NULL;
@@ -358,6 +356,26 @@ err_claim_bus:
 	return NULL;
 }
 
+struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
+		unsigned int max_hz, unsigned int spi_mode)
+{
+	struct spi_slave *spi;
+
+	spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
+	return spi_flash_probe_slave(spi);
+}
+
+#ifdef CONFIG_OF_SPI_FLASH
+struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node,
+				      int spi_node)
+{
+	struct spi_slave *spi;
+
+	spi = spi_setup_slave_fdt(blob, slave_node, spi_node);
+	return spi_flash_probe_slave(spi);
+}
+#endif
+
 void spi_flash_free(struct spi_flash *flash)
 {
 	spi_free_slave(flash->spi);
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 27902fe..ed4ecd7 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -27,6 +27,7 @@ obj-$(CONFIG_MXC_SPI) += mxc_spi.o
 obj-$(CONFIG_MXS_SPI) += mxs_spi.o
 obj-$(CONFIG_OC_TINY_SPI) += oc_tiny_spi.o
 obj-$(CONFIG_OMAP3_SPI) += omap3_spi.o
+obj-$(CONFIG_SANDBOX_SPI) += sandbox_spi.o
 obj-$(CONFIG_SOFT_SPI) += soft_spi.o
 obj-$(CONFIG_SH_SPI) += sh_spi.o
 obj-$(CONFIG_FSL_ESPI) += fsl_espi.o
diff --git a/drivers/spi/exynos_spi.c b/drivers/spi/exynos_spi.c
index 699c57e..4d5def2 100644
--- a/drivers/spi/exynos_spi.c
+++ b/drivers/spi/exynos_spi.c
@@ -529,18 +529,18 @@ static int process_nodes(const void *blob, int node_list[], int count)
  * @param node		SPI peripheral node to use
  * @return 0 if ok, -1 on error
  */
-struct spi_slave *spi_setup_slave_fdt(const void *blob, int node,
-		unsigned int cs, unsigned int max_hz, unsigned int mode)
+struct spi_slave *spi_setup_slave_fdt(const void *blob, int slave_node,
+				      int spi_node)
 {
 	struct spi_bus *bus;
 	unsigned int i;
 
 	for (i = 0, bus = spi_bus; i < bus_count; i++, bus++) {
-		if (bus->node == node)
-			return spi_setup_slave(i, cs, max_hz, mode);
+		if (bus->node == spi_node)
+			return spi_base_setup_slave_fdt(blob, i, slave_node);
 	}
 
-	debug("%s: Failed to find bus node %d\n", __func__, node);
+	debug("%s: Failed to find bus node %d\n", __func__, spi_node);
 	return NULL;
 }
 
diff --git a/drivers/spi/sandbox_spi.c b/drivers/spi/sandbox_spi.c
new file mode 100644
index 0000000..7895305
--- /dev/null
+++ b/drivers/spi/sandbox_spi.c
@@ -0,0 +1,204 @@
+/*
+ * Simulate a SPI port
+ *
+ * Copyright (c) 2011-2013 The Chromium OS Authors.
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <spi.h>
+#include <os.h>
+
+#include <asm/errno.h>
+#include <asm/spi.h>
+#include <asm/state.h>
+
+#ifndef CONFIG_SPI_IDLE_VAL
+# define CONFIG_SPI_IDLE_VAL 0xFF
+#endif
+
+struct sandbox_spi_slave {
+	struct spi_slave slave;
+	const struct sandbox_spi_emu_ops *ops;
+	void *priv;
+};
+
+#define to_sandbox_spi_slave(s) container_of(s, struct sandbox_spi_slave, slave)
+
+const char *sandbox_spi_parse_spec(const char *arg, unsigned long *bus,
+				   unsigned long *cs)
+{
+	char *endp;
+
+	*bus = simple_strtoul(arg, &endp, 0);
+	if (*endp != ':' || *bus >= CONFIG_SANDBOX_SPI_MAX_BUS)
+		return NULL;
+
+	*cs = simple_strtoul(endp + 1, &endp, 0);
+	if (*endp != ':' || *cs >= CONFIG_SANDBOX_SPI_MAX_CS)
+		return NULL;
+
+	return endp + 1;
+}
+
+int spi_cs_is_valid(unsigned int bus, unsigned int cs)
+{
+	return bus < CONFIG_SANDBOX_SPI_MAX_BUS &&
+		cs < CONFIG_SANDBOX_SPI_MAX_CS;
+}
+
+void spi_cs_activate(struct spi_slave *slave)
+{
+	struct sandbox_spi_slave *sss = to_sandbox_spi_slave(slave);
+
+	debug("sandbox_spi: activating CS\n");
+	if (sss->ops->cs_activate)
+		sss->ops->cs_activate(sss->priv);
+}
+
+void spi_cs_deactivate(struct spi_slave *slave)
+{
+	struct sandbox_spi_slave *sss = to_sandbox_spi_slave(slave);
+
+	debug("sandbox_spi: deactivating CS\n");
+	if (sss->ops->cs_deactivate)
+		sss->ops->cs_deactivate(sss->priv);
+}
+
+void spi_init(void)
+{
+}
+
+void spi_set_speed(struct spi_slave *slave, uint hz)
+{
+}
+
+struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
+		unsigned int max_hz, unsigned int mode)
+{
+	struct sandbox_spi_slave *sss;
+	struct sandbox_state *state = state_get_current();
+	const char *spec;
+
+	if (!spi_cs_is_valid(bus, cs)) {
+		debug("sandbox_spi: Invalid SPI bus/cs\n");
+		return NULL;
+	}
+
+	sss = spi_alloc_slave(struct sandbox_spi_slave, bus, cs);
+	if (!sss) {
+		debug("sandbox_spi: Out of memory\n");
+		return NULL;
+	}
+
+	spec = state->spi[bus][cs].spec;
+	sss->ops = state->spi[bus][cs].ops;
+	if (!spec || !sss->ops || sss->ops->setup(&sss->priv, spec)) {
+		free(sss);
+		printf("sandbox_spi: unable to locate a slave client\n");
+		return NULL;
+	}
+
+	return &sss->slave;
+}
+
+void spi_free_slave(struct spi_slave *slave)
+{
+	struct sandbox_spi_slave *sss = to_sandbox_spi_slave(slave);
+
+	debug("sandbox_spi: releasing slave\n");
+
+	if (sss->ops->free)
+		sss->ops->free(sss->priv);
+
+	free(sss);
+}
+
+static int spi_bus_claim_cnt[CONFIG_SANDBOX_SPI_MAX_BUS];
+
+int spi_claim_bus(struct spi_slave *slave)
+{
+	if (spi_bus_claim_cnt[slave->bus]++) {
+		printf("sandbox_spi: error: bus already claimed: %d!\n",
+		       spi_bus_claim_cnt[slave->bus]);
+	}
+
+	return 0;
+}
+
+void spi_release_bus(struct spi_slave *slave)
+{
+	if (--spi_bus_claim_cnt[slave->bus]) {
+		printf("sandbox_spi: error: bus freed too often: %d!\n",
+		       spi_bus_claim_cnt[slave->bus]);
+	}
+}
+
+int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
+		void *din, unsigned long flags)
+{
+	struct sandbox_spi_slave *sss = to_sandbox_spi_slave(slave);
+	uint bytes = bitlen / 8, i;
+	int ret = 0;
+	u8 *tx = (void *)dout, *rx = din;
+
+	if (bitlen == 0)
+		goto done;
+
+	/* we can only do 8 bit transfers */
+	if (bitlen % 8) {
+		printf("sandbox_spi: xfer: invalid bitlen size %u; needs to be 8bit\n",
+		       bitlen);
+		flags |= SPI_XFER_END;
+		goto done;
+	}
+
+	if (flags & SPI_XFER_BEGIN)
+		spi_cs_activate(slave);
+
+	/* make sure rx/tx buffers are full so clients can assume */
+	if (!tx) {
+		debug("sandbox_spi: xfer: auto-allocating tx scratch buffer\n");
+		tx = malloc(bytes);
+		if (!tx) {
+			debug("sandbox_spi: Out of memory\n");
+			return -ENOMEM;
+		}
+	}
+	if (!rx) {
+		debug("sandbox_spi: xfer: auto-allocating rx scratch buffer\n");
+		rx = malloc(bytes);
+		if (!rx) {
+			debug("sandbox_spi: Out of memory\n");
+			return -ENOMEM;
+		}
+	}
+
+	debug("sandbox_spi: xfer: bytes = %u\n tx:", bytes);
+	for (i = 0; i < bytes; ++i)
+		debug(" %u:%02x", i, tx[i]);
+	debug("\n");
+
+	ret = sss->ops->xfer(sss->priv, tx, rx, bytes);
+
+	debug("sandbox_spi: xfer: got back %i (that's %s)\n rx:",
+	      ret, ret ? "bad" : "good");
+	for (i = 0; i < bytes; ++i)
+		debug(" %u:%02x", i, rx[i]);
+	debug("\n");
+
+	if (tx != dout)
+		free(tx);
+	if (rx != din)
+		free(rx);
+
+ done:
+	if (flags & SPI_XFER_END)
+		spi_cs_deactivate(slave);
+
+	return ret;
+}
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index b76a26c..7ddea9b 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -5,6 +5,7 @@
  */
 
 #include <common.h>
+#include <fdtdec.h>
 #include <malloc.h>
 #include <spi.h>
 
@@ -37,3 +38,21 @@ void *spi_do_alloc_slave(int offset, int size, unsigned int bus,
 
 	return ptr;
 }
+
+#ifdef CONFIG_OF_SPI
+struct spi_slave *spi_base_setup_slave_fdt(const void *blob, int busnum,
+					   int node)
+{
+	int cs, max_hz, mode = 0;
+
+	cs = fdtdec_get_int(blob, node, "reg", -1);
+	max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", 100000);
+	if (fdtdec_get_bool(blob, node, "spi-cpol"))
+		mode |= SPI_CPOL;
+	if (fdtdec_get_bool(blob, node, "spi-cpha"))
+		mode |= SPI_CPHA;
+	if (fdtdec_get_bool(blob, node, "spi-cs-high"))
+		mode |= SPI_CS_HIGH;
+	return spi_setup_slave(busnum, cs, max_hz, mode);
+}
+#endif