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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
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34
src/soc/intel/baytrail/spi.c
View File

@@ -260,13 +260,6 @@ static void ich_set_bbar(uint32_t minaddr)
writel_(ichspi_bbar, cntlr.bbar);
}
int spi_setup_slave(unsigned int bus, unsigned int cs, struct spi_slave *slave)
{
slave->bus = bus;
slave->cs = cs;
return 0;
}
static ich9_spi_regs *spi_regs(void)
{
device_t dev;
@@ -308,17 +301,6 @@ static void spi_init_cb(void *unused)
BOOT_STATE_INIT_ENTRY(BS_DEV_INIT, BS_ON_ENTRY, spi_init_cb, NULL);
int spi_claim_bus(const struct spi_slave *slave)
{
/* Handled by ICH automatically. */
return 0;
}
void spi_release_bus(const struct spi_slave *slave)
{
/* Handled by ICH automatically. */
}
typedef struct spi_transaction {
const uint8_t *out;
uint32_t bytesout;
@@ -480,8 +462,8 @@ unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len)
return min(cntlr.databytes, buf_len);
}
int spi_xfer(const struct spi_slave *slave, const void *dout,
size_t bytesout, void *din, size_t bytesin)
static int spi_ctrlr_xfer(const struct spi_slave *slave, const void *dout,
size_t bytesout, void *din, size_t bytesin)
{
uint16_t control;
int16_t opcode_index;
@@ -627,3 +609,15 @@ int spi_xfer(const struct spi_slave *slave, const void *dout,
return 0;
}
static const struct spi_ctrlr spi_ctrlr = {
.xfer = spi_ctrlr_xfer,
};
int spi_setup_slave(unsigned int bus, unsigned int cs, struct spi_slave *slave)
{
slave->bus = bus;
slave->cs = cs;
slave->ctrlr = &spi_ctrlr;
return 0;
}