summaryrefslogtreecommitdiff
path: root/drivers/misc/cros_ec_lpc.c
diff options
context:
space:
mode:
authorVadim Bendebury <vbendeb@chromium.org>2014-02-27 13:26:04 -0700
committerSimon Glass <sjg@chromium.org>2014-03-17 20:05:46 -0600
commit4ff9b461a8c50245a611b15a4fa67784cc452a3d (patch)
tree528883c75feb7de77c138691f1f0df20b4306fce /drivers/misc/cros_ec_lpc.c
parentd7f25f35f448b15f815d355abd9ba39836fd9e32 (diff)
downloadu-boot-imx-4ff9b461a8c50245a611b15a4fa67784cc452a3d.zip
u-boot-imx-4ff9b461a8c50245a611b15a4fa67784cc452a3d.tar.gz
u-boot-imx-4ff9b461a8c50245a611b15a4fa67784cc452a3d.tar.bz2
cros_ec: Drop old EC version support from EC driver
There is no need to support old style EC moving forward. Ultimately we should get rid of the check_version() API. For now just return error in case the EC does not seem to support the new API. Reviewed-by: Vadim Bendebury <vbendeb@google.com> Tested-by: Vadim Bendebury <vbendeb@google.com> Signed-off-by: Vadim Bendebury <vbendeb@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/misc/cros_ec_lpc.c')
-rw-r--r--drivers/misc/cros_ec_lpc.c80
1 files changed, 3 insertions, 77 deletions
diff --git a/drivers/misc/cros_ec_lpc.c b/drivers/misc/cros_ec_lpc.c
index 7257476..0e02671 100644
--- a/drivers/misc/cros_ec_lpc.c
+++ b/drivers/misc/cros_ec_lpc.c
@@ -40,71 +40,6 @@ static int wait_for_sync(struct cros_ec_dev *dev)
return 0;
}
-/**
- * Send a command to a LPC CROS_EC device and return the reply.
- *
- * The device's internal input/output buffers are used.
- *
- * @param dev CROS_EC device
- * @param cmd Command to send (EC_CMD_...)
- * @param cmd_version Version of command to send (EC_VER_...)
- * @param dout Output data (may be NULL If dout_len=0)
- * @param dout_len Size of output data in bytes
- * @param dinp Place to put pointer to response data
- * @param din_len Maximum size of response in bytes
- * @return number of bytes in response, or -1 on error
- */
-static int old_lpc_command(struct cros_ec_dev *dev, uint8_t cmd,
- const uint8_t *dout, int dout_len,
- uint8_t **dinp, int din_len)
-{
- int ret, i;
-
- if (dout_len > EC_OLD_PARAM_SIZE) {
- debug("%s: Cannot send %d bytes\n", __func__, dout_len);
- return -1;
- }
-
- if (din_len > EC_OLD_PARAM_SIZE) {
- debug("%s: Cannot receive %d bytes\n", __func__, din_len);
- return -1;
- }
-
- if (wait_for_sync(dev)) {
- debug("%s: Timeout waiting ready\n", __func__);
- return -1;
- }
-
- debug_trace("cmd: %02x, ", cmd);
- for (i = 0; i < dout_len; i++) {
- debug_trace("%02x ", dout[i]);
- outb(dout[i], EC_LPC_ADDR_OLD_PARAM + i);
- }
- outb(cmd, EC_LPC_ADDR_HOST_CMD);
- debug_trace("\n");
-
- if (wait_for_sync(dev)) {
- debug("%s: Timeout waiting ready\n", __func__);
- return -1;
- }
-
- ret = inb(EC_LPC_ADDR_HOST_DATA);
- if (ret) {
- debug("%s: CROS_EC result code %d\n", __func__, ret);
- return -ret;
- }
-
- debug_trace("resp: %02x, ", ret);
- for (i = 0; i < din_len; i++) {
- dev->din[i] = inb(EC_LPC_ADDR_OLD_PARAM + i);
- debug_trace("%02x ", dev->din[i]);
- }
- debug_trace("\n");
- *dinp = dev->din;
-
- return din_len;
-}
-
int cros_ec_lpc_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
const uint8_t *dout, int dout_len,
uint8_t **dinp, int din_len)
@@ -119,11 +54,6 @@ int cros_ec_lpc_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
int csum;
int i;
- /* Fall back to old-style command interface if args aren't supported */
- if (!dev->cmd_version_is_supported)
- return old_lpc_command(dev, cmd, dout, dout_len, dinp,
- din_len);
-
if (dout_len > EC_HOST_PARAM_SIZE) {
debug("%s: Cannot send %d bytes\n", __func__, dout_len);
return -1;
@@ -256,13 +186,9 @@ int cros_ec_lpc_check_version(struct cros_ec_dev *dev)
(inb(EC_LPC_ADDR_MEMMAP +
EC_MEMMAP_HOST_CMD_FLAGS) &
EC_HOST_CMD_FLAG_LPC_ARGS_SUPPORTED)) {
- dev->cmd_version_is_supported = 1;
- } else {
- /* We are going to use the old IO ports */
- dev->cmd_version_is_supported = 0;
+ return 0;
}
- debug("lpc: version %s\n", dev->cmd_version_is_supported ?
- "new" : "old");
- return 0;
+ printf("%s: ERROR: old EC interface not supported\n", __func__);
+ return -1;
}