diff options
author | Furquan Shaikh <furquan@chromium.org> | 2016-12-01 07:12:32 -0800 |
---|---|---|
committer | Furquan Shaikh <furquan@google.com> | 2016-12-05 03:29:04 +0100 |
commit | 94f8699d447ef94df339d318b836b664273e89ff (patch) | |
tree | 17223ccd5906a8087251beabc943786cade37ee4 /src/southbridge/intel/common | |
parent | 36b81af9e8ecea2bf58aae9a421720ed10f61b82 (diff) | |
download | coreboot-94f8699d447ef94df339d318b836b664273e89ff.tar.xz |
spi: Define and use spi_ctrlr structure
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>
Diffstat (limited to 'src/southbridge/intel/common')
-rw-r--r-- | src/southbridge/intel/common/spi.c | 32 |
1 files changed, 13 insertions, 19 deletions
diff --git a/src/southbridge/intel/common/spi.c b/src/southbridge/intel/common/spi.c index 7e0cc201c7..42a2a748de 100644 --- a/src/southbridge/intel/common/spi.c +++ b/src/southbridge/intel/common/spi.c @@ -285,13 +285,6 @@ 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; -} - void spi_init(void) { uint8_t *rcrb; /* Root Complex Register Block */ @@ -348,17 +341,6 @@ 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; @@ -527,7 +509,7 @@ 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, +static int spi_ctrlr_xfer(const struct spi_slave *slave, const void *dout, size_t bytesout, void *din, size_t bytesin) { uint16_t control; @@ -675,6 +657,18 @@ 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; +} + /* Sets FLA in FADDR to (addr & 0x01FFFFFF) without touching other bits. */ static void ich_hwseq_set_addr(uint32_t addr) { |