cros_ec: Add support for v3 messages on LPC

At present version 3 messages are only supported on SPI. Add support for
using LPC as well, as used on samus.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/drivers/misc/cros_ec_lpc.c b/drivers/misc/cros_ec_lpc.c
index be17adcc5ace1036455d4bc7cb7bca6ee145f85c..71d03bfba2be0f831658866d68095d02a86101de 100644 (file)
--- 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,
 };