diff options
Diffstat (limited to 'drivers/platform/x86/thinkpad_acpi.c')
| -rw-r--r-- | drivers/platform/x86/thinkpad_acpi.c | 600 |
1 files changed, 376 insertions, 224 deletions
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index 63290b33c879..4bdb13796e24 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -122,8 +122,14 @@ enum { TP_NVRAM_POS_LEVEL_VOLUME = 0, }; +/* Misc NVRAM-related */ +enum { + TP_NVRAM_LEVEL_VOLUME_MAX = 14, +}; + /* ACPI HIDs */ #define TPACPI_ACPI_HKEY_HID "IBM0068" +#define TPACPI_ACPI_EC_HID "PNP0C09" /* Input IDs */ #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ @@ -299,8 +305,8 @@ static struct { u32 hotkey_tablet:1; u32 light:1; u32 light_status:1; - u32 bright_16levels:1; u32 bright_acpimode:1; + u32 bright_unkfw:1; u32 wan:1; u32 uwb:1; u32 fan_ctrl_status_undef:1; @@ -363,6 +369,9 @@ struct tpacpi_led_classdev { unsigned int led; }; +/* brightness level capabilities */ +static unsigned int bright_maxlvl; /* 0 = unknown */ + #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES static int dbg_wlswemul; static int tpacpi_wlsw_emulstate; @@ -480,6 +489,15 @@ static unsigned long __init tpacpi_check_quirks( return 0; } +static inline bool __pure __init tpacpi_is_lenovo(void) +{ + return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; +} + +static inline bool __pure __init tpacpi_is_ibm(void) +{ + return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; +} /**************************************************************************** **************************************************************************** @@ -494,21 +512,13 @@ static unsigned long __init tpacpi_check_quirks( */ static acpi_handle root_handle; +static acpi_handle ec_handle; #define TPACPI_HANDLE(object, parent, paths...) \ static acpi_handle object##_handle; \ - static acpi_handle *object##_parent = &parent##_handle; \ - static char *object##_path; \ - static char *object##_paths[] = { paths } - -TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */ - "\\_SB.PCI.ISA.EC", /* 570 */ - "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */ - "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */ - "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */ - "\\_SB.PCI0.ICH3.EC0", /* R31 */ - "\\_SB.PCI0.LPC.EC", /* all others */ - ); + static const acpi_handle *object##_parent __initdata = \ + &parent##_handle; \ + static char *object##_paths[] __initdata = { paths } TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ @@ -528,6 +538,7 @@ TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */ "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ "\\_SB.PCI0.VID0", /* 770e */ "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ + "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ "\\_SB.PCI0.AGP.VID", /* all others */ ); /* R30, R31 */ @@ -594,9 +605,10 @@ static int acpi_evalf(acpi_handle handle, switch (res_type) { case 'd': /* int */ - if (res) + success = (status == AE_OK && + out_obj.type == ACPI_TYPE_INTEGER); + if (success && res) *(int *)res = out_obj.integer.value; - success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER; break; case 'v': /* void */ success = status == AE_OK; @@ -609,8 +621,8 @@ static int acpi_evalf(acpi_handle handle, } if (!success && !quiet) - printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n", - method, fmt0, status); + printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %s\n", + method, fmt0, acpi_format_exception(status)); return success; } @@ -661,11 +673,11 @@ static int issue_thinkpad_cmos_command(int cmos_cmd) #define TPACPI_ACPIHANDLE_INIT(object) \ drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ - object##_paths, ARRAY_SIZE(object##_paths), &object##_path) + object##_paths, ARRAY_SIZE(object##_paths)) -static void drv_acpi_handle_init(char *name, - acpi_handle *handle, acpi_handle parent, - char **paths, int num_paths, char **path) +static void __init drv_acpi_handle_init(const char *name, + acpi_handle *handle, const acpi_handle parent, + char **paths, const int num_paths) { int i; acpi_status status; @@ -676,10 +688,9 @@ static void drv_acpi_handle_init(char *name, for (i = 0; i < num_paths; i++) { status = acpi_get_handle(parent, paths[i], handle); if (ACPI_SUCCESS(status)) { - *path = paths[i]; dbg_printk(TPACPI_DBG_INIT, "Found ACPI handle %s for %s\n", - *path, name); + paths[i], name); return; } } @@ -689,6 +700,43 @@ static void drv_acpi_handle_init(char *name, *handle = NULL; } +static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, + u32 level, void *context, void **return_value) +{ + *(acpi_handle *)return_value = handle; + + return AE_CTRL_TERMINATE; +} + +static void __init tpacpi_acpi_handle_locate(const char *name, + const char *hid, + acpi_handle *handle) +{ + acpi_status status; + acpi_handle device_found; + + BUG_ON(!name || !hid || !handle); + vdbg_printk(TPACPI_DBG_INIT, + "trying to locate ACPI handle for %s, using HID %s\n", + name, hid); + + memset(&device_found, 0, sizeof(device_found)); + status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, + (void *)name, &device_found); + + *handle = NULL; + + if (ACPI_SUCCESS(status)) { + *handle = device_found; + dbg_printk(TPACPI_DBG_INIT, + "Found ACPI handle for %s\n", name); + } else { + vdbg_printk(TPACPI_DBG_INIT, + "Could not locate an ACPI handle for %s: %s\n", + name, acpi_format_exception(status)); + } +} + static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) { struct ibm_struct *ibm = data; @@ -736,8 +784,8 @@ static int __init setup_acpi_notify(struct ibm_struct *ibm) "handling %s events\n", ibm->name); } else { printk(TPACPI_ERR - "acpi_install_notify_handler(%s) failed: %d\n", - ibm->name, status); + "acpi_install_notify_handler(%s) failed: %s\n", + ibm->name, acpi_format_exception(status)); } return -ENODEV; } @@ -1035,80 +1083,6 @@ static void tpacpi_disable_brightness_delay(void) "ACPI backlight control delay disabled\n"); } -static int __init tpacpi_query_bcl_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(TPACPI_ERR "Unknown _BCL data, " - "please report this to %s\n", TPACPI_MAIL); - rc = 0; - } else { - rc = obj->package.count; - } - } else { - return 0; - } - - kfree(buffer.pointer); - return rc; -} - -static acpi_status __init tpacpi_acpi_walk_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)) { - BUG_ON(!rv || !*rv); - **(int **)rv = tpacpi_query_bcl_levels(handle); - return AE_CTRL_TERMINATE; - } else { - return AE_OK; - } -} - -/* - * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map - */ -static int __init tpacpi_check_std_acpi_brightness_support(void) -{ - int status; - int bcl_levels = 0; - void *bcl_ptr = &bcl_levels; - - if (!vid_handle) { - TPACPI_ACPIHANDLE_INIT(vid); - } - if (!vid_handle) - return 0; - - /* - * Search for a _BCL method, and execute it. This is safe on all - * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista - * BIOS in ACPI backlight control mode. We do NOT have to care - * about calling the _BCL method in an enabled video device, any - * will do for our purposes. - */ - - status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3, - tpacpi_acpi_walk_find_bcl, NULL, NULL, - &bcl_ptr); - - if (ACPI_SUCCESS(status) && bcl_levels > 2) { - tp_features.bright_acpimode = 1; - return (bcl_levels - 2); - } - - return 0; -} - static void printk_deprecated_attribute(const char * const what, const char * const details) { @@ -1872,34 +1846,9 @@ static bool __init tpacpi_is_fw_known(void) ****************************************************************************/ /************************************************************************* - * thinkpad-acpi init subdriver + * thinkpad-acpi metadata subdriver */ -static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm) -{ - printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION); - printk(TPACPI_INFO "%s\n", TPACPI_URL); - - printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n", - (thinkpad_id.bios_version_str) ? - thinkpad_id.bios_version_str : "unknown", - (thinkpad_id.ec_version_str) ? - thinkpad_id.ec_version_str : "unknown"); - - if (thinkpad_id.vendor && thinkpad_id.model_str) - printk(TPACPI_INFO "%s %s, model %s\n", - (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? - "IBM" : ((thinkpad_id.vendor == - PCI_VENDOR_ID_LENOVO) ? - "Lenovo" : "Unknown vendor"), - thinkpad_id.model_str, - (thinkpad_id.nummodel_str) ? - thinkpad_id.nummodel_str : "unknown"); - - tpacpi_check_outdated_fw(); - return 0; -} - static int thinkpad_acpi_driver_read(struct seq_file *m) { seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); @@ -2405,6 +2354,36 @@ static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, tpacpi_hotkey_send_key(__scancode); \ } while (0) + void issue_volchange(const unsigned int oldvol, + const unsigned int newvol) + { + unsigned int i = oldvol; + + while (i > newvol) { + TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); + i--; + } + while (i < newvol) { + TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); + i++; + } + } + + void issue_brightnesschange(const unsigned int oldbrt, + const unsigned int newbrt) + { + unsigned int i = oldbrt; + + while (i > newbrt) { + TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); + i--; + } + while (i < newbrt) { + TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); + i++; + } + } + TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); @@ -2414,41 +2393,61 @@ static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); - /* handle volume */ - if (oldn->volume_toggle != newn->volume_toggle) { - if (oldn->mute != newn->mute) { + /* + * Handle volume + * + * This code is supposed to duplicate the IBM firmware behaviour: + * - Pressing MUTE issues mute hotkey message, even when already mute + * - Pressing Volume up/down issues volume up/down hotkey messages, + * even when already at maximum or minumum volume + * - The act of unmuting issues volume up/down notification, + * depending which key was used to unmute + * + * We are constrained to what the NVRAM can tell us, which is not much + * and certainly not enough if more than one volume hotkey was pressed + * since the last poll cycle. + * + * Just to make our life interesting, some newer Lenovo ThinkPads have + * bugs in the BIOS and may fail to update volume_toggle properly. + */ + if (newn->mute) { + /* muted */ + if (!oldn->mute || + oldn->volume_toggle != newn->volume_toggle || + oldn->volume_level != newn->volume_level) { + /* recently muted, or repeated mute keypress, or + * multiple presses ending in mute */ + issue_volchange(oldn->volume_level, newn->volume_level); TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); } - if (oldn->volume_level > newn->volume_level) { - TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); - } else if (oldn->volume_level < newn->volume_level) { + } else { + /* unmute */ + if (oldn->mute) { + /* recently unmuted, issue 'unmute' keypress */ TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); - } else if (oldn->mute == newn->mute) { - /* repeated key presses that didn't change state */ - if (newn->mute) { - TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); - } else if (newn->volume_level != 0) { - TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); - } else { + } + if (oldn->volume_level != newn->volume_level) { + issue_volchange(oldn->volume_level, newn->volume_level); + } else if (oldn->volume_toggle != newn->volume_toggle) { + /* repeated vol up/down keypress at end of scale ? */ + if (newn->volume_level == 0) TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); - } + else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) + TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); } } /* handle brightness */ - if (oldn->brightness_toggle != newn->brightness_toggle) { - if (oldn->brightness_level < newn->brightness_level) { - TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); - } else if (oldn->brightness_level > newn->brightness_level) { + if (oldn->brightness_level != newn->brightness_level) { + issue_brightnesschange(oldn->brightness_level, + newn->brightness_level); + } else if (oldn->brightness_toggle != newn->brightness_toggle) { + /* repeated key presses that didn't change state */ + if (newn->brightness_level == 0) TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); - } else { - /* repeated key presses that didn't change state */ - if (newn->brightness_level != 0) { - TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); - } else { - TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); - } - } + else if (newn->brightness_level >= bright_maxlvl + && !tp_features.bright_unkfw) + TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); } #undef TPACPI_COMPARE_KEY @@ -3353,7 +3352,7 @@ static int __init hotkey_init(struct ibm_init_struct *iibm) goto err_exit; } - if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) { + if (tpacpi_is_lenovo()) { dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, "using Lenovo default hot key map\n"); memcpy(hotkey_keycode_map, &lenovo_keycode_map, @@ -3391,11 +3390,8 @@ static int __init hotkey_init(struct ibm_init_struct *iibm) } /* Do not issue duplicate brightness change events to - * userspace */ - if (!tp_features.bright_acpimode) - /* update bright_acpimode... */ - tpacpi_check_std_acpi_brightness_support(); - + * userspace. tpacpi_detect_brightness_capabilities() must have + * been called before this point */ if (tp_features.bright_acpimode && acpi_video_backlight_support()) { printk(TPACPI_INFO "This ThinkPad has standard ACPI backlight " @@ -4422,7 +4418,8 @@ static int __init video_init(struct ibm_init_struct *iibm) vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); TPACPI_ACPIHANDLE_INIT(vid); - TPACPI_ACPIHANDLE_INIT(vid2); + if (tpacpi_is_ibm()) + TPACPI_ACPIHANDLE_INIT(vid2); if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) /* G41, assume IVGA doesn't change */ @@ -4431,10 +4428,12 @@ static int __init video_init(struct ibm_init_struct *iibm) if (!vid_handle) /* video switching not supported on R30, R31 */ video_supported = TPACPI_VIDEO_NONE; - else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) + else if (tpacpi_is_ibm() && + acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) /* 570 */ video_supported = TPACPI_VIDEO_570; - else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) + else if (tpacpi_is_ibm() && + acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) /* 600e/x, 770e, 770x */ video_supported = TPACPI_VIDEO_770; else @@ -4811,8 +4810,10 @@ static int __init light_init(struct ibm_init_struct *iibm) vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); - TPACPI_ACPIHANDLE_INIT(ledb); - TPACPI_ACPIHANDLE_INIT(lght); + if (tpacpi_is_ibm()) { + TPACPI_ACPIHANDLE_INIT(ledb); + TPACPI_ACPIHANDLE_INIT(lght); + } TPACPI_ACPIHANDLE_INIT(cmos); INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker); @@ -5007,11 +5008,7 @@ enum { /* For TPACPI_LED_OLD */ static enum led_access_mode led_supported; -TPACPI_HANDLE(led, ec, "SLED", /* 570 */ - "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */ - /* T20-22, X20-21 */ - "LED", /* all others */ - ); /* R30, R31 */ +static acpi_handle led_handle; #define TPACPI_LED_NUMLEDS 16 static struct tpacpi_led_classdev *tpacpi_leds; @@ -5271,6 +5268,32 @@ static const struct tpacpi_quirk led_useful_qtable[] __initconst = { #undef TPACPI_LEDQ_IBM #undef TPACPI_LEDQ_LNV +static enum led_access_mode __init led_init_detect_mode(void) +{ + acpi_status status; + + if (tpacpi_is_ibm()) { + /* 570 */ + status = acpi_get_handle(ec_handle, "SLED", &led_handle); + if (ACPI_SUCCESS(status)) + return TPACPI_LED_570; + + /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ + status = acpi_get_handle(ec_handle, "SYSL", &led_handle); + if (ACPI_SUCCESS(status)) + return TPACPI_LED_OLD; + } + + /* most others */ + status = acpi_get_handle(ec_handle, "LED", &led_handle); + if (ACPI_SUCCESS(status)) + return TPACPI_LED_NEW; + + /* R30, R31, and unknown firmwares */ + led_handle = NULL; + return TPACPI_LED_NONE; +} + static int __init led_init(struct ibm_init_struct *iibm) { unsigned int i; @@ -5279,20 +5302,7 @@ static int __init led_init(struct ibm_init_struct *iibm) vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); - TPACPI_ACPIHANDLE_INIT(led); - - if (!led_handle) - /* led not supported on R30, R31 */ - led_supported = TPACPI_LED_NONE; - else if (strlencmp(led_path, "SLED") == 0) - /* 570 */ - led_supported = TPACPI_LED_570; - else if (strlencmp(led_path, "SYSL") == 0) - /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ - led_supported = TPACPI_LED_OLD; - else - /* all others */ - led_supported = TPACPI_LED_NEW; + led_supported = led_init_detect_mode(); vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", str_supported(led_supported), led_supported); @@ -5741,11 +5751,12 @@ static int __init thermal_init(struct ibm_init_struct *iibm) TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; } } else if (acpi_tmp7) { - if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { + if (tpacpi_is_ibm() && + acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { /* 600e/x, 770e, 770x */ thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; } else { - /* Standard ACPI TMPx access, max 8 sensors */ + /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; } } else { @@ -5954,7 +5965,7 @@ static unsigned int tpacpi_brightness_nvram_get(void) lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; - lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07; + lnvram &= bright_maxlvl; return lnvram; } @@ -6063,8 +6074,7 @@ static int brightness_set(unsigned int value) { int res; - if (value > ((tp_features.bright_16levels)? 15 : 7) || - value < 0) + if (value > bright_maxlvl || value < 0) return -EINVAL; vdbg_printk(TPACPI_DBG_BRGHT, @@ -6139,6 +6149,80 @@ static struct backlight_ops ibm_backlight_data = { /* --------------------------------------------------------------------- */ +static int __init tpacpi_query_bcl_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(TPACPI_ERR "Unknown _BCL data, " + "please report this to %s\n", TPACPI_MAIL); + rc = 0; + } else { + rc = obj->package.count; + } + } else { + return 0; + } + + kfree(buffer.pointer); + return rc; +} + +static acpi_status __init tpacpi_acpi_walk_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)) { + BUG_ON(!rv || !*rv); + **(int **)rv = tpacpi_query_bcl_levels(handle); + return AE_CTRL_TERMINATE; + } else { + return AE_OK; + } +} + +/* + * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map + */ +static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) +{ + int status; + int bcl_levels = 0; + void *bcl_ptr = &bcl_levels; + + if (!vid_handle) + TPACPI_ACPIHANDLE_INIT(vid); + + if (!vid_handle) + return 0; + + /* + * Search for a _BCL method, and execute it. This is safe on all + * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista + * BIOS in ACPI backlight control mode. We do NOT have to care + * about calling the _BCL method in an enabled video device, any + * will do for our purposes. + */ + + status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3, + tpacpi_acpi_walk_find_bcl, NULL, NULL, + &bcl_ptr); + + if (ACPI_SUCCESS(status) && bcl_levels > 2) { + tp_features.bright_acpimode = 1; + return bcl_levels - 2; + } + + return 0; +} + /* * These are only useful for models that have only one possibility * of GPU. If the BIOS model handles both ATI and Intel, don't use @@ -6169,6 +6253,47 @@ static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ }; +/* + * Returns < 0 for error, otherwise sets tp_features.bright_* + * and bright_maxlvl. + */ +static void __init tpacpi_detect_brightness_capabilities(void) +{ + unsigned int b; + + vdbg_printk(TPACPI_DBG_INIT, + "detecting firmware brightness interface capabilities\n"); + + /* we could run a quirks check here (same table used by + * brightness_init) if needed */ + + /* + * We always attempt to detect acpi support, so as to switch + * Lenovo Vista BIOS to ACPI brightness mode even if we are not + * going to publish a backlight interface + */ + b = tpacpi_check_std_acpi_brightness_support(); + switch (b) { + case 16: + bright_maxlvl = 15; + printk(TPACPI_INFO + "detected a 16-level brightness capable ThinkPad\n"); + break; + case 8: + case 0: + bright_maxlvl = 7; + printk(TPACPI_INFO + "detected a 8-level brightness capable ThinkPad\n"); + break; + default: + printk(TPACPI_ERR + "Unsupported brightness interface, " + "please contact %s\n", TPACPI_MAIL); + tp_features.bright_unkfw = 1; + bright_maxlvl = b - 1; + } +} + static int __init brightness_init(struct ibm_init_struct *iibm) { struct backlight_properties props; @@ -6182,14 +6307,13 @@ static int __init brightness_init(struct ibm_init_struct *iibm) quirks = tpacpi_check_quirks(brightness_quirk_table, ARRAY_SIZE(brightness_quirk_table)); - /* - * We always attempt to detect acpi support, so as to switch - * Lenovo Vista BIOS to ACPI brightness mode even if we are not - * going to publish a backlight interface - */ - b = tpacpi_check_std_acpi_brightness_support(); - if (b > 0) { + /* tpacpi_detect_brightness_capabilities() must have run already */ + + /* if it is unknown, we don't handle it: it wouldn't be safe */ + if (tp_features.bright_unkfw) + return 1; + if (tp_features.bright_acpimode) { if (acpi_video_backlight_support()) { if (brightness_enable > 1) { printk(TPACPI_NOTICE @@ -6218,15 +6342,6 @@ static int __init brightness_init(struct ibm_init_struct *iibm) return 1; } - if (b > 16) { - printk(TPACPI_ERR - "Unsupported brightness interface, " - "please contact %s\n", TPACPI_MAIL); - return 1; - } - if (b == 16) - tp_features.bright_16levels = 1; - /* * Check for module parameter bogosity, note that we * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be @@ -6249,7 +6364,7 @@ static int __init brightness_init(struct ibm_init_struct *iibm) } /* Safety */ - if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM && + if (!tpacpi_is_ibm() && (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || brightness_mode == TPACPI_BRGHT_MODE_EC)) return -EINVAL; @@ -6257,12 +6372,9 @@ static int __init brightness_init(struct ibm_init_struct *iibm) if (tpacpi_brightness_get_raw(&b) < 0) return 1; - if (tp_features.bright_16levels) - printk(TPACPI_INFO - "detected a 16-level brightness capable ThinkPad\n"); - memset(&props, 0, sizeof(struct backlight_properties)); - props.max_brightness = (tp_features.bright_16levels) ? 15 : 7; + props.max_brightness = bright_maxlvl; + props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL, &ibm_backlight_data, @@ -6285,7 +6397,10 @@ static int __init brightness_init(struct ibm_init_struct *iibm) "or not on your ThinkPad\n", TPACPI_MAIL); } - ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; + /* Added by mistake in early 2007. Probably useless, but it could + * be working around some unknown firmware problem where the value + * read at startup doesn't match the real hardware state... so leave + * it in place just in case */ backlight_update_status(ibm_backlight_device); vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, @@ -6328,9 +6443,8 @@ static int brightness_read(struct seq_file *m) } else { seq_printf(m, "level:\t\t%d\n", level); seq_printf(m, "commands:\tup, down\n"); - seq_printf(m, "commands:\tlevel <level>" - " (<level> is 0-%d)\n", - (tp_features.bright_16levels) ? 15 : 7); + seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", + bright_maxlvl); } return 0; @@ -6341,7 +6455,6 @@ static int brightness_write(char *buf) int level; int rc; char *cmd; - int max_level = (tp_features.bright_16levels) ? 15 : 7; level = brightness_get(NULL); if (level < 0) @@ -6349,13 +6462,13 @@ static int brightness_write(char *buf) while ((cmd = next_cmd(&buf))) { if (strlencmp(cmd, "up") == 0) { - if (level < max_level) + if (level < bright_maxlvl) level++; } else if (strlencmp(cmd, "down") == 0) { if (level > 0) level--; } else if (sscanf(cmd, "level %d", &level) == 1 && - level >= 0 && level <= max_level) { + level >= 0 && level <= bright_maxlvl) { /* new level set */ } else return -EINVAL; @@ -6669,6 +6782,8 @@ static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { + tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", + ucontrol->value.integer.value[0]); return volume_alsa_set_volume(ucontrol->value.integer.value[0]); } @@ -6692,6 +6807,9 @@ static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { + tpacpi_disclose_usertask("ALSA", "%smute\n", + ucontrol->value.integer.value[0] ? + "un" : ""); return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); } @@ -7968,9 +8086,11 @@ static int __init fan_init(struct ibm_init_struct *iibm) tp_features.second_fan = 0; fan_control_desired_level = 7; - TPACPI_ACPIHANDLE_INIT(fans); - TPACPI_ACPIHANDLE_INIT(gfan); - TPACPI_ACPIHANDLE_INIT(sfan); + if (tpacpi_is_ibm()) { + TPACPI_ACPIHANDLE_INIT(fans); + TPACPI_ACPIHANDLE_INIT(gfan); + TPACPI_ACPIHANDLE_INIT(sfan); + } quirks = tpacpi_check_quirks(fan_quirk_table, ARRAY_SIZE(fan_quirk_table)); @@ -8662,6 +8782,10 @@ static int __init probe_for_thinkpad(void) if (acpi_disabled) return -ENODEV; + /* It would be dangerous to run the driver in this case */ + if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) + return -ENODEV; + /* * Non-ancient models have better DMI tagging, but very old models * don't. tpacpi_is_fw_known() is a cheat to help in that case. @@ -8670,8 +8794,8 @@ static int __init probe_for_thinkpad(void) (thinkpad_id.ec_model != 0) || tpacpi_is_fw_known(); - /* ec is required because many other handles are relative to it */ - TPACPI_ACPIHANDLE_INIT(ec); + /* The EC handler is required */ + tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); if (!ec_handle) { if (is_thinkpad) printk(TPACPI_ERR @@ -8685,12 +8809,34 @@ static int __init probe_for_thinkpad(void) return 0; } +static void __init thinkpad_acpi_init_banner(void) +{ + printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION); + printk(TPACPI_INFO "%s\n", TPACPI_URL); + + printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n", + (thinkpad_id.bios_version_str) ? + thinkpad_id.bios_version_str : "unknown", + (thinkpad_id.ec_version_str) ? + thinkpad_id.ec_version_str : "unknown"); + + BUG_ON(!thinkpad_id.vendor); + + if (thinkpad_id.model_str) + printk(TPACPI_INFO "%s %s, model %s\n", + (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? + "IBM" : ((thinkpad_id.vendor == + PCI_VENDOR_ID_LENOVO) ? + "Lenovo" : "Unknown vendor"), + thinkpad_id.model_str, + (thinkpad_id.nummodel_str) ? + thinkpad_id.nummodel_str : "unknown"); +} /* Module init, exit, parameters */ static struct ibm_init_struct ibms_init[] __initdata = { { - .init = thinkpad_acpi_driver_init, .data = &thinkpad_acpi_driver_data, }, { @@ -8960,6 +9106,9 @@ static int __init thinkpad_acpi_module_init(void) /* Driver initialization */ + thinkpad_acpi_init_banner(); + tpacpi_check_outdated_fw(); + TPACPI_ACPIHANDLE_INIT(ecrd); TPACPI_ACPIHANDLE_INIT(ecwr); @@ -9059,13 +9208,16 @@ static int __init thinkpad_acpi_module_init(void) tpacpi_inputdev->name = "ThinkPad Extra Buttons"; tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; tpacpi_inputdev->id.bustype = BUS_HOST; - tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ? - thinkpad_id.vendor : - PCI_VENDOR_ID_IBM; + tpacpi_inputdev->id.vendor = thinkpad_id.vendor; tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; } + + /* Init subdriver dependencies */ + tpacpi_detect_brightness_capabilities(); + + /* Init subdrivers */ for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { ret = ibm_init(&ibms_init[i]); if (ret >= 0 && *ibms_init[i].param) |