53  * 			add /proc/acpi/pcc/brightness interface for HAL access
163 #define ACPI_PCC_CLASS		"pcc"
295 static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val)  in acpi_pcc_write_sset()  argument
309 	status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET,  in acpi_pcc_write_sset()
330 static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc)  in acpi_pcc_retrieve_biosdata()  argument
337 	status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL,  in acpi_pcc_retrieve_biosdata()
351 	if (pcc->num_sifr < hkey->package.count) {  in acpi_pcc_retrieve_biosdata()
353 		       pcc->num_sifr, hkey->package.count);  in acpi_pcc_retrieve_biosdata()
361 			pcc->sinf[i] = element->integer.value;  in acpi_pcc_retrieve_biosdata()
365 	pcc->sinf[hkey->package.count] = -1;  in acpi_pcc_retrieve_biosdata()
381 	struct pcc_acpi *pcc = bl_get_data(bd);  in bl_get()  local
383 	if (!acpi_pcc_retrieve_biosdata(pcc))  in bl_get()
386 	return pcc->sinf[SINF_AC_CUR_BRIGHT];  in bl_get()
391 	struct pcc_acpi *pcc = bl_get_data(bd);  in bl_set_status()  local
395 	if (!acpi_pcc_retrieve_biosdata(pcc))  in bl_set_status()
398 	if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT])  in bl_set_status()
399 		bright = pcc->sinf[SINF_AC_MIN_BRIGHT];  in bl_set_status()
401 	if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT])  in bl_set_status()
402 		bright = pcc->sinf[SINF_DC_MIN_BRIGHT];  in bl_set_status()
404 	if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] ||  in bl_set_status()
405 	    bright > pcc->sinf[SINF_AC_MAX_BRIGHT])  in bl_set_status()
408 	rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright);  in bl_set_status()
412 	return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright);  in bl_set_status()
519 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in numbatt_show()  local
521 	if (!acpi_pcc_retrieve_biosdata(pcc))  in numbatt_show()
524 	return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]);  in numbatt_show()
531 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in lcdtype_show()  local
533 	if (!acpi_pcc_retrieve_biosdata(pcc))  in lcdtype_show()
536 	return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_LCD_TYPE]);  in lcdtype_show()
543 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in mute_show()  local
545 	if (!acpi_pcc_retrieve_biosdata(pcc))  in mute_show()
548 	return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_MUTE]);  in mute_show()
555 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in mute_store()  local
562 		acpi_pcc_write_sset(pcc, SINF_MUTE, val);  in mute_store()
563 		pcc->mute = val;  in mute_store()
573 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in sticky_key_show()  local
575 	if (!acpi_pcc_retrieve_biosdata(pcc))  in sticky_key_show()
578 	return sysfs_emit(buf, "%u\n", pcc->sticky_key);  in sticky_key_show()
585 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in sticky_key_store()  local
592 		acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val);  in sticky_key_store()
593 		pcc->sticky_key = val;  in sticky_key_store()
603 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in eco_mode_show()  local
606 	if (!acpi_pcc_retrieve_biosdata(pcc))  in eco_mode_show()
609 	switch (pcc->sinf[SINF_ECO_MODE]) {  in eco_mode_show()
627 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in eco_mode_store()  local
647 		pcc->sinf[SINF_ECO_MODE] = 0;  in eco_mode_store()
648 		pcc->eco_mode = 0;  in eco_mode_store()
652 		pcc->sinf[SINF_ECO_MODE] = 1;  in eco_mode_store()
653 		pcc->eco_mode = 1;  in eco_mode_store()
674 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in ac_brightness_show()  local
676 	if (!acpi_pcc_retrieve_biosdata(pcc))  in ac_brightness_show()
679 	return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_AC_CUR_BRIGHT]);  in ac_brightness_show()
686 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in ac_brightness_store()  local
693 		acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, val);  in ac_brightness_store()
694 		pcc->ac_brightness = val;  in ac_brightness_store()
704 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in dc_brightness_show()  local
706 	if (!acpi_pcc_retrieve_biosdata(pcc))  in dc_brightness_show()
709 	return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_DC_CUR_BRIGHT]);  in dc_brightness_show()
716 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in dc_brightness_store()  local
723 		acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, val);  in dc_brightness_store()
724 		pcc->dc_brightness = val;  in dc_brightness_store()
734 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in current_brightness_show()  local
736 	if (!acpi_pcc_retrieve_biosdata(pcc))  in current_brightness_show()
739 	return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_CUR_BRIGHT]);  in current_brightness_show()
746 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in current_brightness_store()  local
754 		err = acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, val);  in current_brightness_store()
755 		pcc->current_brightness = val;  in current_brightness_store()
793 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in pcc_sysfs_is_visible()  local
796 		return (pcc->num_sifr > SINF_MUTE) ? attr->mode : 0;  in pcc_sysfs_is_visible()
799 		return (pcc->num_sifr > SINF_ECO_MODE) ? attr->mode : 0;  in pcc_sysfs_is_visible()
802 		return (pcc->num_sifr > SINF_CUR_BRIGHT) ? attr->mode : 0;  in pcc_sysfs_is_visible()
830 static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)  in acpi_pcc_generate_keyinput()  argument
832 	struct input_dev *hotk_input_dev = pcc->input_dev;  in acpi_pcc_generate_keyinput()
838 	rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY,  in acpi_pcc_generate_keyinput()
870 	struct pcc_acpi *pcc = acpi_driver_data(device);  in acpi_pcc_hotkey_notify()  local
874 		acpi_pcc_generate_keyinput(pcc);  in acpi_pcc_hotkey_notify()
890 static int pcc_register_optd_notifier(struct pcc_acpi *pcc, char *node)  in pcc_register_optd_notifier()  argument
900 				pcc_optd_notify, pcc);  in pcc_register_optd_notifier()
909 static void pcc_unregister_optd_notifier(struct pcc_acpi *pcc, char *node)  in pcc_unregister_optd_notifier()  argument
926 static int acpi_pcc_init_input(struct pcc_acpi *pcc)  in acpi_pcc_init_input()  argument
954 	pcc->input_dev = input_dev;  in acpi_pcc_init_input()
967 	struct pcc_acpi *pcc;  in acpi_pcc_hotkey_resume()  local
972 	pcc = acpi_driver_data(to_acpi_device(dev));  in acpi_pcc_hotkey_resume()
973 	if (!pcc)  in acpi_pcc_hotkey_resume()
976 	if (pcc->num_sifr > SINF_MUTE)  in acpi_pcc_hotkey_resume()
977 		acpi_pcc_write_sset(pcc, SINF_MUTE, pcc->mute);  in acpi_pcc_hotkey_resume()
978 	if (pcc->num_sifr > SINF_ECO_MODE)  in acpi_pcc_hotkey_resume()
979 		acpi_pcc_write_sset(pcc, SINF_ECO_MODE, pcc->eco_mode);  in acpi_pcc_hotkey_resume()
980 	acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_key);  in acpi_pcc_hotkey_resume()
981 	acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, pcc->ac_brightness);  in acpi_pcc_hotkey_resume()
982 	acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, pcc->dc_brightness);  in acpi_pcc_hotkey_resume()
983 	if (pcc->num_sifr > SINF_CUR_BRIGHT)  in acpi_pcc_hotkey_resume()
984 		acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, pcc->current_brightness);  in acpi_pcc_hotkey_resume()
993 	struct pcc_acpi *pcc;  in acpi_pcc_hotkey_add()  local
1002 	 * pcc->sinf is expected to at least have the AC+DC brightness entries.  in acpi_pcc_hotkey_add()
1016 	pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL);  in acpi_pcc_hotkey_add()
1017 	if (!pcc) {  in acpi_pcc_hotkey_add()
1018 		pr_err("Couldn't allocate mem for pcc");  in acpi_pcc_hotkey_add()
1022 	pcc->sinf = kcalloc(num_sifr + 1, sizeof(u32), GFP_KERNEL);  in acpi_pcc_hotkey_add()
1023 	if (!pcc->sinf) {  in acpi_pcc_hotkey_add()
1028 	pcc->device = device;  in acpi_pcc_hotkey_add()
1029 	pcc->handle = device->handle;  in acpi_pcc_hotkey_add()
1030 	pcc->num_sifr = num_sifr;  in acpi_pcc_hotkey_add()
1031 	device->driver_data = pcc;  in acpi_pcc_hotkey_add()
1035 	result = acpi_pcc_init_input(pcc);  in acpi_pcc_hotkey_add()
1041 	if (!acpi_pcc_retrieve_biosdata(pcc)) {  in acpi_pcc_hotkey_add()
1051 		props.max_brightness = pcc->sinf[SINF_AC_MAX_BRIGHT];  in acpi_pcc_hotkey_add()
1053 		pcc->backlight = backlight_device_register("panasonic", NULL, pcc,  in acpi_pcc_hotkey_add()
1055 		if (IS_ERR(pcc->backlight)) {  in acpi_pcc_hotkey_add()
1056 			result = PTR_ERR(pcc->backlight);  in acpi_pcc_hotkey_add()
1061 		pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];  in acpi_pcc_hotkey_add()
1065 	acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, 0);  in acpi_pcc_hotkey_add()
1066 	pcc->sticky_key = 0;  in acpi_pcc_hotkey_add()
1068 	pcc->ac_brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];  in acpi_pcc_hotkey_add()
1069 	pcc->dc_brightness = pcc->sinf[SINF_DC_CUR_BRIGHT];  in acpi_pcc_hotkey_add()
1070 	if (pcc->num_sifr > SINF_MUTE)  in acpi_pcc_hotkey_add()
1071 		pcc->mute = pcc->sinf[SINF_MUTE];  in acpi_pcc_hotkey_add()
1072 	if (pcc->num_sifr > SINF_ECO_MODE)  in acpi_pcc_hotkey_add()
1073 		pcc->eco_mode = pcc->sinf[SINF_ECO_MODE];  in acpi_pcc_hotkey_add()
1074 	if (pcc->num_sifr > SINF_CUR_BRIGHT)  in acpi_pcc_hotkey_add()
1075 		pcc->current_brightness = pcc->sinf[SINF_CUR_BRIGHT];  in acpi_pcc_hotkey_add()
1084 		pcc->platform = platform_device_register_simple("panasonic",  in acpi_pcc_hotkey_add()
1086 		if (IS_ERR(pcc->platform)) {  in acpi_pcc_hotkey_add()
1087 			result = PTR_ERR(pcc->platform);  in acpi_pcc_hotkey_add()
1090 		result = device_create_file(&pcc->platform->dev,  in acpi_pcc_hotkey_add()
1092 		pcc_register_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD");  in acpi_pcc_hotkey_add()
1096 		pcc->platform = NULL;  in acpi_pcc_hotkey_add()
1103 	platform_device_unregister(pcc->platform);  in acpi_pcc_hotkey_add()
1105 	backlight_device_unregister(pcc->backlight);  in acpi_pcc_hotkey_add()
1107 	input_unregister_device(pcc->input_dev);  in acpi_pcc_hotkey_add()
1109 	kfree(pcc->sinf);  in acpi_pcc_hotkey_add()
1111 	kfree(pcc);  in acpi_pcc_hotkey_add()
1118 	struct pcc_acpi *pcc = acpi_driver_data(device);  in acpi_pcc_hotkey_remove()  local
1120 	if (!device || !pcc)  in acpi_pcc_hotkey_remove()
1125 	if (pcc->platform) {  in acpi_pcc_hotkey_remove()
1126 		device_remove_file(&pcc->platform->dev, &dev_attr_cdpower);  in acpi_pcc_hotkey_remove()
1127 		platform_device_unregister(pcc->platform);  in acpi_pcc_hotkey_remove()
1129 	pcc_unregister_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD");  in acpi_pcc_hotkey_remove()
1133 	backlight_device_unregister(pcc->backlight);  in acpi_pcc_hotkey_remove()
1135 	input_unregister_device(pcc->input_dev);  in acpi_pcc_hotkey_remove()
1137 	kfree(pcc->sinf);  in acpi_pcc_hotkey_remove()
1138 	kfree(pcc);  in acpi_pcc_hotkey_remove()