diff options
Diffstat (limited to 'drivers/misc/cros_ec_lpc.c')
| -rw-r--r-- | drivers/misc/cros_ec_lpc.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/misc/cros_ec_lpc.c b/drivers/misc/cros_ec_lpc.c index be17adcc5a..71d03bfba2 100644 --- a/drivers/misc/cros_ec_lpc.c +++ b/drivers/misc/cros_ec_lpc.c @@ -40,6 +40,38 @@ static int wait_for_sync(struct cros_ec_dev *dev) return 0; } +int cros_ec_lpc_packet(struct udevice *udev, int out_bytes, int in_bytes) +{ + struct cros_ec_dev *dev = dev_get_uclass_priv(udev); + uint8_t *d; + int i; + + if (out_bytes > EC_LPC_HOST_PACKET_SIZE) + return log_msg_ret("Cannot send that many bytes\n", -E2BIG); + + if (in_bytes > EC_LPC_HOST_PACKET_SIZE) + return log_msg_ret("Cannot receive that many bytes\n", -E2BIG); + + if (wait_for_sync(dev)) + return log_msg_ret("Timeout waiting ready\n", -ETIMEDOUT); + + /* Write data */ + for (i = 0, d = (uint8_t *)dev->dout; i < out_bytes; i++, d++) + outb(*d, EC_LPC_ADDR_HOST_PACKET + i); + + /* Start the command */ + outb(EC_COMMAND_PROTOCOL_3, EC_LPC_ADDR_HOST_CMD); + + if (wait_for_sync(dev)) + return log_msg_ret("Timeout waiting ready\n", -ETIMEDOUT); + + /* Read back args */ + for (i = 0, d = dev->din; i < in_bytes; i++, d++) + *d = inb(EC_LPC_ADDR_HOST_PACKET + i); + + return in_bytes; +} + int cros_ec_lpc_command(struct udevice *udev, uint8_t cmd, int cmd_version, const uint8_t *dout, int dout_len, uint8_t **dinp, int din_len) @@ -200,6 +232,7 @@ static int cros_ec_probe(struct udevice *dev) } static struct dm_cros_ec_ops cros_ec_ops = { + .packet = cros_ec_lpc_packet, .command = cros_ec_lpc_command, .check_version = cros_ec_lpc_check_version, }; |