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-rw-r--r--src/cpu/samsung/exynos5420/spi.c33
1 files changed, 29 insertions, 4 deletions
diff --git a/src/cpu/samsung/exynos5420/spi.c b/src/cpu/samsung/exynos5420/spi.c
index e3029b83db..82c37650da 100644
--- a/src/cpu/samsung/exynos5420/spi.c
+++ b/src/cpu/samsung/exynos5420/spi.c
@@ -41,6 +41,32 @@ struct exynos_spi_slave {
uint8_t frame_header; /* header byte to detect in half-duplex mode. */
};
+/* TODO(hungte) Move the SPI param list to per-board configuration, probably
+ * Kconfig or mainboard.c */
+static struct exynos_spi_slave exynos_spi_slaves[3] = {
+ // SPI 0
+ {
+ .slave = { .bus = 0, },
+ .regs = samsung_get_base_spi0(),
+ },
+ // SPI 1
+ {
+ .slave = { .bus = 1, .rw = SPI_READ_FLAG, },
+ .regs = samsung_get_base_spi1(),
+ .fifo_size = 64,
+ .half_duplex = 0,
+ },
+ // SPI 2
+ {
+ .slave = { .bus = 2,
+ .rw = SPI_READ_FLAG | SPI_WRITE_FLAG, },
+ .regs = samsung_get_base_spi2(),
+ .fifo_size = 64,
+ .half_duplex = 1,
+ .frame_header = 0xec,
+ },
+};
+
static inline struct exynos_spi_slave *to_exynos_spi(struct spi_slave *slave)
{
return container_of(slave, struct exynos_spi_slave, slave);
@@ -54,14 +80,13 @@ void spi_init(void)
struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int mode)
{
- // TODO(hungte) Provide Exynos SPI device setup.
- return NULL;
+ ASSERT(bus >= 0 && bus < 3);
+ return &(exynos_spi_slaves[bus].slave);
}
int spi_cs_is_valid(unsigned int bus, unsigned int cs)
{
- // TODO(hungte) Detect and check if BUS/CS is valid.
- return 0;
+ return bus > 0 && bus < 3;
}
void spi_cs_activate(struct spi_slave *slave)