diff options
Diffstat (limited to 'src/ec/google/chromeec/ec_spi.c')
| -rw-r--r-- | src/ec/google/chromeec/ec_spi.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/src/ec/google/chromeec/ec_spi.c b/src/ec/google/chromeec/ec_spi.c index f1bdd3caaa..6107836153 100644 --- a/src/ec/google/chromeec/ec_spi.c +++ b/src/ec/google/chromeec/ec_spi.c @@ -25,15 +25,32 @@ static const uint8_t EcFramingByte = 0xec; -static int crosec_spi_io(uint8_t *write_bytes, size_t write_size, - uint8_t *read_bytes, size_t read_size, - void *context) +#define PROTO3_MAX_PACKET_SIZE 268 + +static uint8_t req_buf[PROTO3_MAX_PACKET_SIZE]; +static uint8_t resp_buf[PROTO3_MAX_PACKET_SIZE]; + +void *crosec_get_buffer(size_t size, int req) +{ + if (size > PROTO3_MAX_PACKET_SIZE) { + printk(BIOS_DEBUG, "Proto v3 buffer request too large: %zu!\n", + size); + return NULL; + } + + if (req) + return req_buf; + else + return resp_buf; +} + +static int crosec_spi_io(size_t req_size, size_t resp_size, void *context) { struct spi_slave *slave = (struct spi_slave *)context; spi_claim_bus(slave); - if (spi_xfer(slave, write_bytes, write_size, NULL, 0)) { + if (spi_xfer(slave, req_buf, req_size, NULL, 0)) { printk(BIOS_ERR, "%s: Failed to send request.\n", __func__); spi_release_bus(slave); return -1; @@ -64,7 +81,7 @@ static int crosec_spi_io(uint8_t *write_bytes, size_t write_size, } } - if (spi_xfer(slave, NULL, 0, read_bytes, read_size)) { + if (spi_xfer(slave, NULL, 0, resp_buf, resp_size)) { printk(BIOS_ERR, "%s: Failed to receive response.\n", __func__); spi_release_bus(slave); return -1; |