diff options
Diffstat (limited to 'src/ec')
| -rw-r--r-- | src/ec/google/chromeec/ec_lpc.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/src/ec/google/chromeec/ec_lpc.c b/src/ec/google/chromeec/ec_lpc.c index 06b506b059..51a6e53035 100644 --- a/src/ec/google/chromeec/ec_lpc.c +++ b/src/ec/google/chromeec/ec_lpc.c @@ -96,7 +96,7 @@ static inline u8 write_byte(u8 val, u16 port) return byte; } -static int google_chromeec_wait_ready(u16 port) +static int google_chromeec_status_check(u16 port, u8 mask, u8 cond) { u8 ec_status = read_byte(port); u32 time_count = 0; @@ -108,8 +108,7 @@ static int google_chromeec_wait_ready(u16 port) */ #define MAX_EC_TIMEOUT_US 1000000 - while (ec_status & - (EC_LPC_CMDR_PENDING | EC_LPC_CMDR_BUSY)) { + while ((ec_status & mask) != cond) { udelay(1); if (time_count++ == MAX_EC_TIMEOUT_US) return -1; @@ -118,6 +117,13 @@ static int google_chromeec_wait_ready(u16 port) return 0; } +static int google_chromeec_wait_ready(u16 port) +{ + return google_chromeec_status_check(port, + EC_LPC_CMDR_PENDING | + EC_LPC_CMDR_BUSY, 0); +} + #if CONFIG_EC_GOOGLE_CHROMEEC_ACPI_MEMMAP /* Read memmap data through ACPI port 66/62 */ static int read_memmap(u8 *data, u8 offset) @@ -481,6 +487,12 @@ struct chip_operations ec_google_chromeec_ops = { #endif /* __SMM__ */ +static int google_chromeec_data_ready(u16 port) +{ + return google_chromeec_status_check(port, EC_LPC_CMDR_DATA, + EC_LPC_CMDR_DATA); +} + u8 google_chromeec_get_event(void) { if (google_chromeec_wait_ready(EC_LPC_ADDR_ACPI_CMD)) { @@ -496,6 +508,11 @@ u8 google_chromeec_get_event(void) return 0; } + if (google_chromeec_data_ready(EC_LPC_ADDR_ACPI_CMD)) { + printk(BIOS_ERR, "Timeout waiting for data ready!\n"); + return 0; + } + /* Event (or 0 if none) is returned directly in the data byte */ return read_byte(EC_LPC_ADDR_ACPI_DATA); } |