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authorTom Rini <trini@ti.com>2013-12-10 09:36:23 -0500
committerTom Rini <trini@ti.com>2013-12-10 09:36:23 -0500
commit65b7fe28a12bbaccc7a0c076f5f9f213150030e7 (patch)
tree96be894262501d04c9bb637a837180b7708e49e8 /drivers
parente1e3de79515b95712a41f52c86a0181530f2fc03 (diff)
parentca9a501953ce945da8e76d86a0ddf070a7f729b8 (diff)
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Merge branch 'spi' of git://git.denx.de/u-boot-x86
Diffstat (limited to 'drivers')
-rw-r--r--drivers/misc/cros_ec_spi.c3
-rw-r--r--drivers/mtd/spi/Makefile1
-rw-r--r--drivers/mtd/spi/sandbox.c483
-rw-r--r--drivers/mtd/spi/sf_internal.h1
-rw-r--r--drivers/mtd/spi/sf_probe.c28
-rw-r--r--drivers/spi/Makefile1
-rw-r--r--drivers/spi/exynos_spi.c10
-rw-r--r--drivers/spi/sandbox_spi.c204
-rw-r--r--drivers/spi/spi.c19
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