From 4ff9b461a8c50245a611b15a4fa67784cc452a3d Mon Sep 17 00:00:00 2001 From: Vadim Bendebury Date: Thu, 27 Feb 2014 13:26:04 -0700 Subject: [PATCH] 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 Tested-by: Vadim Bendebury Signed-off-by: Vadim Bendebury Signed-off-by: Simon Glass --- drivers/misc/cros_ec.c | 15 ++------- drivers/misc/cros_ec_lpc.c | 80 ++-------------------------------------------- 2 files changed, 6 insertions(+), 89 deletions(-) diff --git a/drivers/misc/cros_ec.c b/drivers/misc/cros_ec.c index 1998653..f95bfe7 100644 --- a/drivers/misc/cros_ec.c +++ b/drivers/misc/cros_ec.c @@ -132,10 +132,6 @@ static int ec_command_inptr(struct cros_ec_dev *dev, uint8_t cmd, uint8_t *din; int len; - if (cmd_version != 0 && !dev->cmd_version_is_supported) { - debug("%s: Command version >0 unsupported\n", __func__); - return -1; - } len = send_command(dev, cmd, cmd_version, dout, dout_len, &din, din_len); @@ -510,14 +506,9 @@ static int cros_ec_check_version(struct cros_ec_dev *dev) /* It appears to understand new version commands */ dev->cmd_version_is_supported = 1; } else { - dev->cmd_version_is_supported = 0; - if (ec_command_inptr(dev, EC_CMD_HELLO, 0, &req, - sizeof(req), (uint8_t **)&resp, - sizeof(*resp)) < 0) { - debug("%s: Failed both old and new command style\n", - __func__); - return -1; - } + printf("%s: ERROR: old EC interface not supported\n", + __func__); + return -1; } return 0; 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; }