Emulation/switch-coreboot
1
0
Fork 0
mirror of https://github.com/fail0verflow/switch-coreboot.git synced 2025-05-04 01:39:18 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

armv7/exynos5420: Provide configuration for SPI0~SPI2.

Browse source 
Fill the SPI device parameters for spi_setup_slave on Exynos 5420.

Change-Id: I10b4b9e6cfe46d7bfa34e80e3727c7e7da99ba9d
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3711
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Hung-Te Lin 2013-06-26 20:17:42 +08:00 • committed by Stefan Reinauer
parent ffa5bada72
commit ed1742cafe
1 changed files with 29 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

33
src/cpu/samsung/exynos5420/spi.c
View file

@ -41,6 +41,32 @@ struct exynos_spi_slave {
uint8_t frame_header; /* header byte to detect in half-duplex mode. */ 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) static inline struct exynos_spi_slave *to_exynos_spi(struct spi_slave *slave)
{ {
return container_of(slave, struct exynos_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, struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int mode) unsigned int max_hz, unsigned int mode)
{ {
// TODO(hungte) Provide Exynos SPI device setup. ASSERT(bus >= 0 && bus < 3);
return NULL; return &(exynos_spi_slaves[bus].slave);
} }
int spi_cs_is_valid(unsigned int bus, unsigned int cs) int spi_cs_is_valid(unsigned int bus, unsigned int cs)
{ {
// TODO(hungte) Detect and check if BUS/CS is valid. return bus > 0 && bus < 3;
return 0;
} }
void spi_cs_activate(struct spi_slave *slave) void spi_cs_activate(struct spi_slave *slave)