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 <s...@chromium.org>
---
drivers/misc/cros_ec_lpc.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/drivers/misc/cros_ec_lpc.c b/drivers/misc/cros_ec_lpc.c
index be17adcc5ac..71d03bfba2b 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,
};
--
2.19.0.605.g01d371f741-goog
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
https://lists.denx.de/listinfo/u-boot
