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spi: Define and use spi_ctrlr structure

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1. Define a new structure spi_ctrlr that allows platforms to define
callbacks for spi operations (claim bus, release bus, transfer).
2. Add a new member (pointer to spi_ctrlr structure) in spi_slave
structure which will be initialized by call to spi_setup_slave.
3. Define spi_claim_bus, spi_release_bus and spi_xfer in spi-generic.c
which will make appropriate calls to ctrlr functions.

BUG=chrome-os-partner:59832
BRANCH=None
TEST=Compiles successfully

Change-Id: Icb2326e3aab1e8f4bef53f553f82b3836358c55e
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/17684
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Furquan Shaikh
2016-12-01 07:12:32 -08:00
committed by Furquan Shaikh
parent 36b81af9e8
commit 94f8699d44
26 changed files with 521 additions and 494 deletions
Download Patch File Download Diff File Expand all files Collapse all files

60
src/soc/mediatek/mt8173/spi.c
View File

@@ -160,29 +160,7 @@ static void mtk_spi_dump_data(const char *name, const uint8_t *data,
#endif
}
int spi_setup_slave(unsigned int bus, unsigned int cs, struct spi_slave *slave)
{
struct mtk_spi_bus *eslave;
switch (bus) {
case CONFIG_EC_GOOGLE_CHROMEEC_SPI_BUS:
slave->bus = bus;
slave->cs = cs;
eslave = to_mtk_spi(slave);
assert(read32(&eslave->regs->spi_cfg0_reg) != 0);
spi_sw_reset(eslave->regs);
return 0;
case CONFIG_BOOT_DEVICE_SPI_FLASH_BUS:
slave->bus = bus;
slave->cs = cs;
return 0;
default:
die ("wrong bus number.\n");
};
return -1;
}
int spi_claim_bus(const struct spi_slave *slave)
static int spi_ctrlr_claim_bus(const struct spi_slave *slave)
{
struct mtk_spi_bus *mtk_slave = to_mtk_spi(slave);
struct mtk_spi_regs *regs = mtk_slave->regs;
@@ -269,8 +247,8 @@ error:
return -1;
}
int spi_xfer(const struct spi_slave *slave, const void *dout, size_t bytes_out,
void *din, size_t bytes_in)
static int spi_ctrlr_xfer(const struct spi_slave *slave, const void *dout,
size_t bytes_out, void *din, size_t bytes_in)
{
size_t min_size = 0;
int ret;
@@ -301,7 +279,7 @@ int spi_xfer(const struct spi_slave *slave, const void *dout, size_t bytes_out,
return 0;
}
void spi_release_bus(const struct spi_slave *slave)
static void spi_ctrlr_release_bus(const struct spi_slave *slave)
{
struct mtk_spi_bus *mtk_slave = to_mtk_spi(slave);
struct mtk_spi_regs *regs = mtk_slave->regs;
@@ -310,3 +288,33 @@ void spi_release_bus(const struct spi_slave *slave)
spi_sw_reset(regs);
mtk_slave->state = MTK_SPI_IDLE;
}
static const struct spi_ctrlr spi_ctrlr = {
.claim_bus = spi_ctrlr_claim_bus,
.release_bus = spi_ctrlr_release_bus,
.xfer = spi_ctrlr_xfer,
};
int spi_setup_slave(unsigned int bus, unsigned int cs, struct spi_slave *slave)
{
struct mtk_spi_bus *eslave;
slave->ctrlr = &spi_ctrlr;
switch (bus) {
case CONFIG_EC_GOOGLE_CHROMEEC_SPI_BUS:
slave->bus = bus;
slave->cs = cs;
eslave = to_mtk_spi(slave);
assert(read32(&eslave->regs->spi_cfg0_reg) != 0);
spi_sw_reset(eslave->regs);
return 0;
case CONFIG_BOOT_DEVICE_SPI_FLASH_BUS:
slave->bus = bus;
slave->cs = cs;
return 0;
default:
die ("wrong bus number.\n");
};
return -1;
}