diff options
author | Kevin Cernekee <cernekee@gmail.com> | 2013-02-14 06:19:01 (GMT) |
---|---|---|
committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2013-02-14 17:17:52 (GMT) |
commit | 24ba9707829818daab711eed7e41313d5e56d0b4 (patch) | |
tree | d0b765cca4a754b8f5c53f4dfddc91a092540d5a /drivers | |
parent | 2e992cc030d8e4e42632bcc9e16605e629886778 (diff) | |
download | linux-fsl-qoriq-24ba9707829818daab711eed7e41313d5e56d0b4.tar.xz |
Input: ALPS - introduce helper function for repeated commands
Several ALPS driver init sequences repeat a command three times, then
issue PSMOUSE_CMD_GETINFO to read the result. Move this into a helper
function to simplify the code.
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Tested-by: Dave Turvene <dturvene@dahetral.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/input/mouse/alps.c | 71 |
1 files changed, 30 insertions, 41 deletions
diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c index c473549..1ca854b 100644 --- a/drivers/input/mouse/alps.c +++ b/drivers/input/mouse/alps.c @@ -964,24 +964,42 @@ static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr, return __alps_command_mode_write_reg(psmouse, value); } +static int alps_rpt_cmd(struct psmouse *psmouse, int init_command, + int repeated_command, unsigned char *param) +{ + struct ps2dev *ps2dev = &psmouse->ps2dev; + + param[0] = 0; + if (init_command && ps2_command(ps2dev, param, init_command)) + return -EIO; + + if (ps2_command(ps2dev, NULL, repeated_command) || + ps2_command(ps2dev, NULL, repeated_command) || + ps2_command(ps2dev, NULL, repeated_command)) + return -EIO; + + param[0] = param[1] = param[2] = 0xff; + if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) + return -EIO; + + psmouse_dbg(psmouse, "%2.2X report: %2.2x %2.2x %2.2x\n", + repeated_command, param[0], param[1], param[2]); + return 0; +} + static int alps_enter_command_mode(struct psmouse *psmouse, unsigned char *resp) { unsigned char param[4]; - struct ps2dev *ps2dev = &psmouse->ps2dev; - if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) || - ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) || - ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) || - ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) { + if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) { psmouse_err(psmouse, "failed to enter command mode\n"); return -1; } if (param[0] != 0x88 && param[1] != 0x07) { psmouse_dbg(psmouse, - "unknown response while entering command mode: %2.2x %2.2x %2.2x\n", - param[0], param[1], param[2]); + "unknown response while entering command mode\n"); return -1; } @@ -1041,18 +1059,10 @@ static int alps_absolute_mode_v1_v2(struct psmouse *psmouse) static int alps_get_status(struct psmouse *psmouse, char *param) { - struct ps2dev *ps2dev = &psmouse->ps2dev; - /* Get status: 0xF5 0xF5 0xF5 0xE9 */ - if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || - ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || - ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || - ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) + if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param)) return -1; - psmouse_dbg(psmouse, "Status: %2.2x %2.2x %2.2x", - param[0], param[1], param[2]); - return 0; } @@ -1443,7 +1453,6 @@ static int alps_hw_init(struct psmouse *psmouse) static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version) { - struct ps2dev *ps2dev = &psmouse->ps2dev; static const unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 }; unsigned char param[4]; const struct alps_model_info *model = NULL; @@ -1455,20 +1464,10 @@ static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int * The bits 0-2 of the first byte will be 1s if some buttons are * pressed. */ - param[0] = 0; - if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) || - ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || - ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || - ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) - return NULL; - - param[0] = param[1] = param[2] = 0xff; - if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) + if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES, PSMOUSE_CMD_SETSCALE11, + param)) return NULL; - psmouse_dbg(psmouse, "E6 report: %2.2x %2.2x %2.2x", - param[0], param[1], param[2]); - if ((param[0] & 0xf8) != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100)) return NULL; @@ -1477,20 +1476,10 @@ static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int * Now try "E7 report". Allowed responses are in * alps_model_data[].signature */ - param[0] = 0; - if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) || - ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || - ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || - ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21)) - return NULL; - - param[0] = param[1] = param[2] = 0xff; - if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) + if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES, PSMOUSE_CMD_SETSCALE21, + param)) return NULL; - psmouse_dbg(psmouse, "E7 report: %2.2x %2.2x %2.2x", - param[0], param[1], param[2]); - if (version) { for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++) /* empty */; |