diff options
Diffstat (limited to 'src/ec')
| -rw-r--r-- | src/ec/acpi/ec.c | 15 | ||||
| -rw-r--r-- | src/ec/acpi/ec.h | 1 |
2 files changed, 16 insertions, 0 deletions
diff --git a/src/ec/acpi/ec.c b/src/ec/acpi/ec.c index a739b98df3..61cad656eb 100644 --- a/src/ec/acpi/ec.c +++ b/src/ec/acpi/ec.c @@ -111,6 +111,21 @@ u8 recv_ec_data(void) return data; } +void ec_clear_out_queue(void) +{ + int timeout = 0x7fff; + printk(BIOS_SPEW, "Clearing EC output queue...\n"); + while (--timeout && (inb(ec_cmd_reg) & EC_OBF)) { + u8 data = inb(ec_data_reg); + printk(BIOS_SPEW, "Discarding a garbage byte: 0x%02x\n", data); + udelay(10); + } + if (!timeout) + printk(BIOS_ERR, "Timeout while clearing EC output queue!\n"); + else + printk(BIOS_SPEW, "EC output queue has been cleared.\n"); +} + u8 ec_read(u8 addr) { send_ec_command(0x80); diff --git a/src/ec/acpi/ec.h b/src/ec/acpi/ec.h index d9487e9015..48982d315e 100644 --- a/src/ec/acpi/ec.h +++ b/src/ec/acpi/ec.h @@ -40,6 +40,7 @@ int send_ec_command(u8 command); int send_ec_data(u8 data); int send_ec_data_nowait(u8 data); u8 recv_ec_data(void); +void ec_clear_out_queue(void); u8 ec_status(void); u8 ec_query(void); u8 ec_read(u8 addr); |