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-rw-r--r--drivers/misc/thinkpad_acpi.c231
-rw-r--r--drivers/misc/thinkpad_acpi.h4
2 files changed, 181 insertions, 54 deletions
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index e953276..ab23a32 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -21,7 +21,7 @@
* 02110-1301, USA.
*/
-#define IBM_VERSION "0.16"
+#define IBM_VERSION "0.17"
#define TPACPI_SYSFS_VERSION 0x020000
/*
@@ -964,15 +964,15 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
KEY_UNKNOWN, /* 0x0D: FN+INSERT */
KEY_UNKNOWN, /* 0x0E: FN+DELETE */
- KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
+ KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
/* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
- KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
+ KEY_RESERVED, /* 0x10: FN+END (brightness down) */
KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
- KEY_VOLUMEUP, /* 0x14: VOLUME UP */
- KEY_VOLUMEDOWN, /* 0x15: VOLUME DOWN */
- KEY_MUTE, /* 0x16: MUTE */
+ KEY_RESERVED, /* 0x14: VOLUME UP */
+ KEY_RESERVED, /* 0x15: VOLUME DOWN */
+ KEY_RESERVED, /* 0x16: MUTE */
KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
/* (assignments unknown, please report if found) */
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
@@ -993,9 +993,9 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
- KEY_VOLUMEUP, /* 0x14: VOLUME UP */
- KEY_VOLUMEDOWN, /* 0x15: VOLUME DOWN */
- KEY_MUTE, /* 0x16: MUTE */
+ KEY_RESERVED, /* 0x14: VOLUME UP */
+ KEY_RESERVED, /* 0x15: VOLUME DOWN */
+ KEY_RESERVED, /* 0x16: MUTE */
KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
/* (assignments unknown, please report if found) */
KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
@@ -1342,9 +1342,8 @@ static int hotkey_read(char *p)
return len;
}
- res = mutex_lock_interruptible(&hotkey_mutex);
- if (res < 0)
- return res;
+ if (mutex_lock_interruptible(&hotkey_mutex))
+ return -ERESTARTSYS;
res = hotkey_get(&status, &mask);
mutex_unlock(&hotkey_mutex);
if (res)
@@ -1373,9 +1372,8 @@ static int hotkey_write(char *buf)
if (!tp_features.hotkey)
return -ENODEV;
- res = mutex_lock_interruptible(&hotkey_mutex);
- if (res < 0)
- return res;
+ if (mutex_lock_interruptible(&hotkey_mutex))
+ return -ERESTARTSYS;
res = hotkey_get(&status, &mask);
if (res)
@@ -3114,6 +3112,99 @@ static struct backlight_ops ibm_backlight_data = {
static struct mutex brightness_mutex;
+static int __init tpacpi_query_bcll_levels(acpi_handle handle)
+{
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object *obj;
+ int rc;
+
+ if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
+ obj = (union acpi_object *)buffer.pointer;
+ if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
+ printk(IBM_ERR "Unknown BCLL data, "
+ "please report this to %s\n", IBM_MAIL);
+ rc = 0;
+ } else {
+ rc = obj->package.count;
+ }
+ } else {
+ return 0;
+ }
+
+ kfree(buffer.pointer);
+ return rc;
+}
+
+static acpi_status __init brightness_find_bcll(acpi_handle handle, u32 lvl,
+ void *context, void **rv)
+{
+ char name[ACPI_PATH_SEGMENT_LENGTH];
+ struct acpi_buffer buffer = { sizeof(name), &name };
+
+ if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
+ !strncmp("BCLL", name, sizeof(name) - 1)) {
+ if (tpacpi_query_bcll_levels(handle) == 16) {
+ *rv = handle;
+ return AE_CTRL_TERMINATE;
+ } else {
+ return AE_OK;
+ }
+ } else {
+ return AE_OK;
+ }
+}
+
+static int __init brightness_check_levels(void)
+{
+ int status;
+ void *found_node = NULL;
+
+ if (!vid_handle) {
+ IBM_ACPIHANDLE_INIT(vid);
+ }
+ if (!vid_handle)
+ return 0;
+
+ /* Search for a BCLL package with 16 levels */
+ status = acpi_walk_namespace(ACPI_TYPE_PACKAGE, vid_handle, 3,
+ brightness_find_bcll, NULL, &found_node);
+
+ return (ACPI_SUCCESS(status) && found_node != NULL);
+}
+
+static acpi_status __init brightness_find_bcl(acpi_handle handle, u32 lvl,
+ void *context, void **rv)
+{
+ char name[ACPI_PATH_SEGMENT_LENGTH];
+ struct acpi_buffer buffer = { sizeof(name), &name };
+
+ if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
+ !strncmp("_BCL", name, sizeof(name) - 1)) {
+ *rv = handle;
+ return AE_CTRL_TERMINATE;
+ } else {
+ return AE_OK;
+ }
+}
+
+static int __init brightness_check_std_acpi_support(void)
+{
+ int status;
+ void *found_node = NULL;
+
+ if (!vid_handle) {
+ IBM_ACPIHANDLE_INIT(vid);
+ }
+ if (!vid_handle)
+ return 0;
+
+ /* Search for a _BCL method, but don't execute it */
+ status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
+ brightness_find_bcl, NULL, &found_node);
+
+ return (ACPI_SUCCESS(status) && found_node != NULL);
+}
+
static int __init brightness_init(struct ibm_init_struct *iibm)
{
int b;
@@ -3122,6 +3213,18 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
mutex_init(&brightness_mutex);
+ if (!brightness_enable) {
+ dbg_printk(TPACPI_DBG_INIT,
+ "brightness support disabled by module parameter\n");
+ return 1;
+ } else if (brightness_enable > 1) {
+ if (brightness_check_std_acpi_support()) {
+ printk(IBM_NOTICE
+ "standard ACPI backlight interface available, not loading native one...\n");
+ return 1;
+ }
+ }
+
if (!brightness_mode) {
if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
brightness_mode = 2;
@@ -3135,10 +3238,17 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
if (brightness_mode > 3)
return -EINVAL;
+ tp_features.bright_16levels =
+ thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO &&
+ brightness_check_levels();
+
b = brightness_get(NULL);
if (b < 0)
return 1;
+ if (tp_features.bright_16levels)
+ printk(IBM_INFO "detected a 16-level brightness capable ThinkPad\n");
+
ibm_backlight_device = backlight_device_register(
TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
&ibm_backlight_data);
@@ -3148,7 +3258,8 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
}
vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
- ibm_backlight_device->props.max_brightness = 7;
+ ibm_backlight_device->props.max_brightness =
+ (tp_features.bright_16levels)? 15 : 7;
ibm_backlight_device->props.brightness = b;
backlight_update_status(ibm_backlight_device);
@@ -3167,6 +3278,8 @@ static void brightness_exit(void)
static int brightness_update_status(struct backlight_device *bd)
{
+ /* it is the backlight class's job (caller) to handle
+ * EINTR and other errors properly */
return brightness_set(
(bd->props.fb_blank == FB_BLANK_UNBLANK &&
bd->props.power == FB_BLANK_UNBLANK) ?
@@ -3184,13 +3297,14 @@ static int brightness_get(struct backlight_device *bd)
if (brightness_mode & 1) {
if (!acpi_ec_read(brightness_offset, &lec))
return -EIO;
- lec &= 7;
+ lec &= (tp_features.bright_16levels)? 0x0f : 0x07;
level = lec;
};
if (brightness_mode & 2) {
lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
& TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
>> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
+ lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
level = lcmos;
}
@@ -3206,12 +3320,13 @@ static int brightness_get(struct backlight_device *bd)
return level;
}
+/* May return EINTR which can always be mapped to ERESTARTSYS */
static int brightness_set(int value)
{
int cmos_cmd, inc, i, res;
int current_value;
- if (value > 7)
+ if (value > ((tp_features.bright_16levels)? 15 : 7))
return -EINVAL;
res = mutex_lock_interruptible(&brightness_mutex);
@@ -3227,7 +3342,7 @@ static int brightness_set(int value)
cmos_cmd = value > current_value ?
TP_CMOS_BRIGHTNESS_UP :
TP_CMOS_BRIGHTNESS_DOWN;
- inc = value > current_value ? 1 : -1;
+ inc = (value > current_value)? 1 : -1;
res = 0;
for (i = current_value; i != value; i += inc) {
@@ -3256,10 +3371,11 @@ static int brightness_read(char *p)
if ((level = brightness_get(NULL)) < 0) {
len += sprintf(p + len, "level:\t\tunreadable\n");
} else {
- len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
+ len += sprintf(p + len, "level:\t\t%d\n", level);
len += sprintf(p + len, "commands:\tup, down\n");
len += sprintf(p + len, "commands:\tlevel <level>"
- " (<level> is 0-7)\n");
+ " (<level> is 0-%d)\n",
+ (tp_features.bright_16levels) ? 15 : 7);
}
return len;
@@ -3268,28 +3384,34 @@ static int brightness_read(char *p)
static int brightness_write(char *buf)
{
int level;
- int new_level;
+ int rc;
char *cmd;
+ int max_level = (tp_features.bright_16levels) ? 15 : 7;
- while ((cmd = next_cmd(&buf))) {
- if ((level = brightness_get(NULL)) < 0)
- return level;
- level &= 7;
+ level = brightness_get(NULL);
+ if (level < 0)
+ return level;
+ while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "up") == 0) {
- new_level = level == 7 ? 7 : level + 1;
+ if (level < max_level)
+ level++;
} else if (strlencmp(cmd, "down") == 0) {
- new_level = level == 0 ? 0 : level - 1;
- } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
- new_level >= 0 && new_level <= 7) {
- /* new_level set */
+ if (level > 0)
+ level--;
+ } else if (sscanf(cmd, "level %d", &level) == 1 &&
+ level >= 0 && level <= max_level) {
+ /* new level set */
} else
return -EINVAL;
-
- brightness_set(new_level);
}
- return 0;
+ /*
+ * Now we know what the final level should be, so we try to set it.
+ * Doing it this way makes the syscall restartable in case of EINTR
+ */
+ rc = brightness_set(level);
+ return (rc == -EINTR)? ERESTARTSYS : rc;
}
static struct ibm_struct brightness_driver_data = {
@@ -3652,9 +3774,8 @@ static ssize_t fan_pwm1_store(struct device *dev,
/* scale down from 0-255 to 0-7 */
newlevel = (s >> 5) & 0x07;
- rc = mutex_lock_interruptible(&fan_mutex);
- if (rc < 0)
- return rc;
+ if (mutex_lock_interruptible(&fan_mutex))
+ return -ERESTARTSYS;
rc = fan_get_status(&status);
if (!rc && (status &
@@ -3904,9 +4025,8 @@ static int fan_get_status_safe(u8 *status)
int rc;
u8 s;
- rc = mutex_lock_interruptible(&fan_mutex);
- if (rc < 0)
- return rc;
+ if (mutex_lock_interruptible(&fan_mutex))
+ return -ERESTARTSYS;
rc = fan_get_status(&s);
if (!rc)
fan_update_desired_level(s);
@@ -4040,9 +4160,8 @@ static int fan_set_level_safe(int level)
if (!fan_control_allowed)
return -EPERM;
- rc = mutex_lock_interruptible(&fan_mutex);
- if (rc < 0)
- return rc;
+ if (mutex_lock_interruptible(&fan_mutex))
+ return -ERESTARTSYS;
if (level == TPACPI_FAN_LAST_LEVEL)
level = fan_control_desired_level;
@@ -4063,9 +4182,8 @@ static int fan_set_enable(void)
if (!fan_control_allowed)
return -EPERM;
- rc = mutex_lock_interruptible(&fan_mutex);
- if (rc < 0)
- return rc;
+ if (mutex_lock_interruptible(&fan_mutex))
+ return -ERESTARTSYS;
switch (fan_control_access_mode) {
case TPACPI_FAN_WR_ACPI_FANS:
@@ -4119,9 +4237,8 @@ static int fan_set_disable(void)
if (!fan_control_allowed)
return -EPERM;
- rc = mutex_lock_interruptible(&fan_mutex);
- if (rc < 0)
- return rc;
+ if (mutex_lock_interruptible(&fan_mutex))
+ return -ERESTARTSYS;
rc = 0;
switch (fan_control_access_mode) {
@@ -4158,9 +4275,8 @@ static int fan_set_speed(int speed)
if (!fan_control_allowed)
return -EPERM;
- rc = mutex_lock_interruptible(&fan_mutex);
- if (rc < 0)
- return rc;
+ if (mutex_lock_interruptible(&fan_mutex))
+ return -ERESTARTSYS;
rc = 0;
switch (fan_control_access_mode) {
@@ -4701,9 +4817,15 @@ static int __init set_ibm_param(const char *val, struct kernel_param *kp)
unsigned int i;
struct ibm_struct *ibm;
+ if (!kp || !kp->name || !val)
+ return -EINVAL;
+
for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
ibm = ibms_init[i].data;
- BUG_ON(ibm == NULL);
+ WARN_ON(ibm == NULL);
+
+ if (!ibm || !ibm->name)
+ continue;
if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
if (strlen(val) > sizeof(ibms_init[i].param) - 2)
@@ -4732,6 +4854,9 @@ module_param_named(fan_control, fan_control_allowed, bool, 0);
static int brightness_mode;
module_param_named(brightness_mode, brightness_mode, int, 0);
+static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
+module_param(brightness_enable, uint, 0);
+
static unsigned int hotkey_report_mode;
module_param(hotkey_report_mode, uint, 0);
diff --git a/drivers/misc/thinkpad_acpi.h b/drivers/misc/thinkpad_acpi.h
index 3abcc81..8fba2bb 100644
--- a/drivers/misc/thinkpad_acpi.h
+++ b/drivers/misc/thinkpad_acpi.h
@@ -84,7 +84,7 @@
/* ThinkPad CMOS NVRAM constants */
#define TP_NVRAM_ADDR_BRIGHTNESS 0x5e
-#define TP_NVRAM_MASK_LEVEL_BRIGHTNESS 0x07
+#define TP_NVRAM_MASK_LEVEL_BRIGHTNESS 0x0f
#define TP_NVRAM_POS_LEVEL_BRIGHTNESS 0
#define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
@@ -246,6 +246,7 @@ static struct {
u32 hotkey_wlsw:1;
u32 light:1;
u32 light_status:1;
+ u32 bright_16levels:1;
u32 wan:1;
u32 fan_ctrl_status_undef:1;
u32 input_device_registered:1;
@@ -338,6 +339,7 @@ static int bluetooth_write(char *buf);
static struct backlight_device *ibm_backlight_device;
static int brightness_offset = 0x31;
static int brightness_mode;
+static unsigned int brightness_enable; /* 0 = no, 1 = yes, 2 = auto */
static int brightness_init(struct ibm_init_struct *iibm);
static void brightness_exit(void);
generated by cgit v1.1 at 2024-12-25 19:28:45 +0000