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Date: Wed, 11 Apr 2012 18:15:02 +0800
From: Alex Hung <alex.hung@...onical.com>
To: ibm-acpi@....eng.br, mjg@...hat.com,
ibm-acpi-devel@...ts.sourceforge.net,
platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
alex.hung@...onical.com
Subject: [PATCH] thinkpad_acpi: added BIOS mute interfaces for volume
Signed-off-by: Alex Hung <alex.hung@...onical.com>
---
drivers/platform/x86/thinkpad_acpi.c | 115 +++++++++++++++++++++++++++++++---
1 files changed, 106 insertions(+), 9 deletions(-)
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 7b82868..dc22a4c 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -6486,12 +6486,86 @@ enum tpacpi_volume_capabilities {
TPACPI_VOL_CAP_MAX
};
+enum {
+ TPACPI_AML_MUTE_GET_FUNC = 0x01,
+ TPACPI_AML_MUTE_SET_FUNC = 0x02,
+ TPACPI_AML_MUTE_SUPPORT_FUNC = 0x04,
+ TPACPI_AML_MUTE_READ_MASK = 0x01,
+ TPACPI_AML_MUTE_ERROR_STATE_MASK = 0x80000000,
+};
+
static enum tpacpi_volume_access_mode volume_mode =
TPACPI_VOL_MODE_MAX;
static enum tpacpi_volume_capabilities volume_capabilities;
static int volume_control_allowed;
+
+static bool volume_bios_support(int func)
+{
+ acpi_handle temp;
+
+ if ((func | TPACPI_AML_MUTE_GET_FUNC) &&
+ !ACPI_SUCCESS(acpi_get_handle(hkey_handle, "GSMS", &temp)))
+ return false;
+
+ if ((func | TPACPI_AML_MUTE_SET_FUNC) &&
+ !ACPI_SUCCESS(acpi_get_handle(hkey_handle, "SSMS", &temp)))
+ return false;
+
+ if ((func | TPACPI_AML_MUTE_SUPPORT_FUNC) &&
+ !ACPI_SUCCESS(acpi_get_handle(hkey_handle, "SHDA", &temp)))
+ return false;
+
+ return true;
+}
+
+static int hotkey_get_mute_state(int *state)
+{
+ if (!acpi_evalf(hkey_handle, state, "GSMS", "dd"))
+ return -EIO;
+
+ if (*state & TPACPI_AML_MUTE_ERROR_STATE_MASK)
+ pr_warning("getting mute state failed.\n");
+
+ *state &= TPACPI_AML_MUTE_READ_MASK;
+ pr_info("get mute state = %s.\n", *state ? "muted" : "unmuted");
+
+ return 0;
+}
+
+static int hotkey_set_mute_state(int state)
+{
+ int output;
+
+ if (!acpi_evalf(hkey_handle, &output, "SSMS", "dd", state))
+ return -EIO;
+
+ if (output & TPACPI_AML_MUTE_ERROR_STATE_MASK) {
+ pr_warning("setting mute state failed.\n");
+ return -EIO;
+ }
+ pr_info("set to mute led state to %s.\n", state ? "on" : "off");
+
+ return 0;
+}
+
+static int hotkey_set_mute_support(int support)
+{
+ int output;
+
+ if (!acpi_evalf(hkey_handle, &output, "SHDA", "dd", support))
+ return -EIO;
+
+ if (output & TPACPI_AML_MUTE_ERROR_STATE_MASK) {
+ pr_warning("setting mute support failed.\n");
+ return -EIO;
+ }
+ pr_info("%s mute led support.\n", support ? "disable" : "enable");
+
+ return 0;
+}
+
/*
* Used to syncronize writers to TP_EC_AUDIO and
* TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
@@ -6982,6 +7056,7 @@ static int __init volume_init(struct ibm_init_struct *iibm)
static int volume_read(struct seq_file *m)
{
u8 status;
+ int mute;
if (volume_get_status(&status) < 0) {
seq_printf(m, "level:\t\tunreadable\n");
@@ -6991,8 +7066,12 @@ static int volume_read(struct seq_file *m)
else
seq_printf(m, "level:\t\t%d\n",
status & TP_EC_AUDIO_LVL_MSK);
-
- seq_printf(m, "mute:\t\t%s\n",
+ if (volume_bios_support(TPACPI_AML_MUTE_GET_FUNC) &&
+ !hotkey_get_mute_state(&mute))
+ seq_printf(m, "mute:\t\t%s\n",
+ mute ? "muted" : "unmuted");
+ else
+ seq_printf(m, "mute:\t\t%s\n",
onoff(status, TP_EC_AUDIO_MUTESW));
if (volume_control_allowed) {
@@ -7005,7 +7084,8 @@ static int volume_read(struct seq_file *m)
" (<level> is 0-%d)\n",
TP_EC_VOLUME_MAX);
}
- }
+ } else if (volume_bios_support(TPACPI_AML_MUTE_SET_FUNC))
+ seq_printf(m, "commands:\tunmute, mute\n");
}
return 0;
@@ -7019,6 +7099,21 @@ static int volume_write(char *buf)
char *cmd;
int rc;
+ if (volume_bios_support(
+ TPACPI_AML_MUTE_SET_FUNC | TPACPI_AML_MUTE_SUPPORT_FUNC)) {
+ while ((cmd = next_cmd(&buf))) {
+ if (strlencmp(cmd, "mute") == 0)
+ hotkey_set_mute_state(1);
+ else if (strlencmp(cmd, "unmute") == 0)
+ hotkey_set_mute_state(0);
+ else if (strlencmp(cmd, "disable") == 0)
+ hotkey_set_mute_support(1);
+ else if (strlencmp(cmd, "enable") == 0)
+ hotkey_set_mute_support(0);
+ }
+ return -EINVAL;
+ }
+
/*
* We do allow volume control at driver startup, so that the
* user can set initial state through the volume=... parameter hack.
@@ -7061,12 +7156,14 @@ static int volume_write(char *buf)
continue;
}
}
- if (strlencmp(cmd, "mute") == 0)
- new_mute = TP_EC_AUDIO_MUTESW_MSK;
- else if (strlencmp(cmd, "unmute") == 0)
- new_mute = 0;
- else
- return -EINVAL;
+ if (!volume_bios_support(TPACPI_AML_MUTE_SET_FUNC)) {
+ if (strlencmp(cmd, "mute") == 0)
+ new_mute = TP_EC_AUDIO_MUTESW_MSK;
+ else if (strlencmp(cmd, "unmute") == 0)
+ new_mute = 0;
+ else
+ return -EINVAL;
+ }
}
if (tp_features.mixer_no_level_control) {
--
1.7.5.4
--
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