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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>
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1 changed files with 33 additions and 0 deletions
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@ -40,6 +40,38 @@ static int wait_for_sync(struct cros_ec_dev *dev)
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return 0;
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return 0;
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}
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}
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int cros_ec_lpc_packet(struct udevice *udev, int out_bytes, int in_bytes)
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{
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struct cros_ec_dev *dev = dev_get_uclass_priv(udev);
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uint8_t *d;
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int i;
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if (out_bytes > EC_LPC_HOST_PACKET_SIZE)
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return log_msg_ret("Cannot send that many bytes\n", -E2BIG);
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if (in_bytes > EC_LPC_HOST_PACKET_SIZE)
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return log_msg_ret("Cannot receive that many bytes\n", -E2BIG);
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if (wait_for_sync(dev))
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return log_msg_ret("Timeout waiting ready\n", -ETIMEDOUT);
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/* Write data */
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for (i = 0, d = (uint8_t *)dev->dout; i < out_bytes; i++, d++)
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outb(*d, EC_LPC_ADDR_HOST_PACKET + i);
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/* Start the command */
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outb(EC_COMMAND_PROTOCOL_3, EC_LPC_ADDR_HOST_CMD);
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if (wait_for_sync(dev))
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return log_msg_ret("Timeout waiting ready\n", -ETIMEDOUT);
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/* Read back args */
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for (i = 0, d = dev->din; i < in_bytes; i++, d++)
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*d = inb(EC_LPC_ADDR_HOST_PACKET + i);
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return in_bytes;
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}
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int cros_ec_lpc_command(struct udevice *udev, uint8_t cmd, int cmd_version,
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int cros_ec_lpc_command(struct udevice *udev, uint8_t cmd, int cmd_version,
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const uint8_t *dout, int dout_len,
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const uint8_t *dout, int dout_len,
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uint8_t **dinp, int din_len)
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uint8_t **dinp, int din_len)
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@ -200,6 +232,7 @@ static int cros_ec_probe(struct udevice *dev)
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}
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}
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static struct dm_cros_ec_ops cros_ec_ops = {
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static struct dm_cros_ec_ops cros_ec_ops = {
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.packet = cros_ec_lpc_packet,
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.command = cros_ec_lpc_command,
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.command = cros_ec_lpc_command,
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.check_version = cros_ec_lpc_check_version,
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.check_version = cros_ec_lpc_check_version,
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};
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};
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