*/
#include <common.h>
+#include <dm.h>
#include <malloc.h>
#include <spi.h>
+#include <spi_flash.h>
#include <os.h>
#include <asm/errno.h>
#include <asm/spi.h>
#include <asm/state.h>
+#include <dm/device-internal.h>
+
+DECLARE_GLOBAL_DATA_PTR;
#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)
{
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)
+__weak int sandbox_spi_get_emul(struct sandbox_state *state,
+ struct udevice *bus, struct udevice *slave,
+ struct udevice **emulp)
{
+ return -ENOENT;
}
-struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
- unsigned int max_hz, unsigned int mode)
+static int sandbox_spi_xfer(struct udevice *slave, unsigned int bitlen,
+ const void *dout, void *din, unsigned long flags)
{
- struct sandbox_spi_slave *sss;
+ struct udevice *bus = slave->parent;
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);
+ struct dm_spi_emul_ops *ops;
+ struct udevice *emul;
uint bytes = bitlen / 8, i;
- int ret = 0;
+ int ret;
u8 *tx = (void *)dout, *rx = din;
+ uint busnum, cs;
if (bitlen == 0)
- goto done;
+ return 0;
/* 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;
+ return -EINVAL;
}
- if (flags & SPI_XFER_BEGIN)
- spi_cs_activate(slave);
+ busnum = bus->seq;
+ cs = spi_chip_select(slave);
+ if (busnum >= CONFIG_SANDBOX_SPI_MAX_BUS ||
+ cs >= CONFIG_SANDBOX_SPI_MAX_CS) {
+ printf("%s: busnum=%u, cs=%u: out of range\n", __func__,
+ busnum, cs);
+ return -ENOENT;
+ }
+ ret = sandbox_spi_get_emul(state, bus, slave, &emul);
+ if (ret) {
+ printf("%s: busnum=%u, cs=%u: no emulation available (err=%d)\n",
+ __func__, busnum, cs, ret);
+ return -ENOENT;
+ }
+ ret = device_probe(emul);
+ if (ret)
+ return ret;
/* make sure rx/tx buffers are full so clients can assume */
if (!tx) {
}
}
- 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);
+ ops = spi_emul_get_ops(emul);
+ ret = ops->xfer(emul, bitlen, dout, din, flags);
debug("sandbox_spi: xfer: got back %i (that's %s)\n rx:",
ret, ret ? "bad" : "good");
if (rx != din)
free(rx);
- done:
- if (flags & SPI_XFER_END)
- spi_cs_deactivate(slave);
-
return ret;
}
-/**
- * Set up a new SPI slave for an fdt node
- *
- * @param blob Device tree blob
- * @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 slave_node,
- int spi_node)
+static int sandbox_spi_set_speed(struct udevice *bus, uint speed)
+{
+ return 0;
+}
+
+static int sandbox_spi_set_mode(struct udevice *bus, uint mode)
+{
+ return 0;
+}
+
+static int sandbox_cs_info(struct udevice *bus, uint cs,
+ struct spi_cs_info *info)
{
- return NULL;
+ /* Always allow activity on CS 0 */
+ if (cs >= 1)
+ return -ENODEV;
+
+ return 0;
}
+
+static const struct dm_spi_ops sandbox_spi_ops = {
+ .xfer = sandbox_spi_xfer,
+ .set_speed = sandbox_spi_set_speed,
+ .set_mode = sandbox_spi_set_mode,
+ .cs_info = sandbox_cs_info,
+};
+
+static const struct udevice_id sandbox_spi_ids[] = {
+ { .compatible = "sandbox,spi" },
+ { }
+};
+
+U_BOOT_DRIVER(spi_sandbox) = {
+ .name = "spi_sandbox",
+ .id = UCLASS_SPI,
+ .of_match = sandbox_spi_ids,
+ .per_child_auto_alloc_size = sizeof(struct spi_slave),
+ .ops = &sandbox_spi_ops,
+};
projects / platform / kernel / u-boot.git / commitdiff