53  * 			add /proc/acpi/pcc/brightness interface for HAL access
160 #define ACPI_PCC_CLASS		"pcc"
245 static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val)  in acpi_pcc_write_sset()  argument
259 	status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET,  in acpi_pcc_write_sset()
280 static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc)  in acpi_pcc_retrieve_biosdata()  argument
287 	status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL,  in acpi_pcc_retrieve_biosdata()
301 	if (pcc->num_sifr < hkey->package.count) {  in acpi_pcc_retrieve_biosdata()
310 			pcc->sinf[i] = element->integer.value;  in acpi_pcc_retrieve_biosdata()
314 	pcc->sinf[hkey->package.count] = -1;  in acpi_pcc_retrieve_biosdata()
330 	struct pcc_acpi *pcc = bl_get_data(bd);  in bl_get()  local
332 	if (!acpi_pcc_retrieve_biosdata(pcc))  in bl_get()
335 	return pcc->sinf[SINF_AC_CUR_BRIGHT];  in bl_get()
340 	struct pcc_acpi *pcc = bl_get_data(bd);  in bl_set_status()  local
344 	if (!acpi_pcc_retrieve_biosdata(pcc))  in bl_set_status()
347 	if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT])  in bl_set_status()
348 		bright = pcc->sinf[SINF_AC_MIN_BRIGHT];  in bl_set_status()
350 	if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT])  in bl_set_status()
351 		bright = pcc->sinf[SINF_DC_MIN_BRIGHT];  in bl_set_status()
353 	if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] ||  in bl_set_status()
354 	    bright > pcc->sinf[SINF_AC_MAX_BRIGHT])  in bl_set_status()
357 	rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright);  in bl_set_status()
361 	return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright);  in bl_set_status()
468 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in numbatt_show()  local
470 	if (!acpi_pcc_retrieve_biosdata(pcc))  in numbatt_show()
473 	return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]);  in numbatt_show()
480 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in lcdtype_show()  local
482 	if (!acpi_pcc_retrieve_biosdata(pcc))  in lcdtype_show()
485 	return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_LCD_TYPE]);  in lcdtype_show()
492 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in mute_show()  local
494 	if (!acpi_pcc_retrieve_biosdata(pcc))  in mute_show()
497 	return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_MUTE]);  in mute_show()
504 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in mute_store()  local
511 		acpi_pcc_write_sset(pcc, SINF_MUTE, val);  in mute_store()
512 		pcc->mute = val;  in mute_store()
522 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in sticky_key_show()  local
524 	if (!acpi_pcc_retrieve_biosdata(pcc))  in sticky_key_show()
527 	return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sticky_key);  in sticky_key_show()
534 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in sticky_key_store()  local
541 		acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val);  in sticky_key_store()
542 		pcc->sticky_key = val;  in sticky_key_store()
552 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in eco_mode_show()  local
555 	if (!acpi_pcc_retrieve_biosdata(pcc))  in eco_mode_show()
558 	switch (pcc->sinf[SINF_ECO_MODE]) {  in eco_mode_show()
576 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in eco_mode_store()  local
596 		pcc->sinf[SINF_ECO_MODE] = 0;  in eco_mode_store()
597 		pcc->eco_mode = 0;  in eco_mode_store()
601 		pcc->sinf[SINF_ECO_MODE] = 1;  in eco_mode_store()
602 		pcc->eco_mode = 1;  in eco_mode_store()
623 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in ac_brightness_show()  local
625 	if (!acpi_pcc_retrieve_biosdata(pcc))  in ac_brightness_show()
628 	return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_AC_CUR_BRIGHT]);  in ac_brightness_show()
635 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in ac_brightness_store()  local
642 		acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, val);  in ac_brightness_store()
643 		pcc->ac_brightness = val;  in ac_brightness_store()
653 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in dc_brightness_show()  local
655 	if (!acpi_pcc_retrieve_biosdata(pcc))  in dc_brightness_show()
658 	return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_DC_CUR_BRIGHT]);  in dc_brightness_show()
665 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in dc_brightness_store()  local
672 		acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, val);  in dc_brightness_store()
673 		pcc->dc_brightness = val;  in dc_brightness_store()
683 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in current_brightness_show()  local
685 	if (!acpi_pcc_retrieve_biosdata(pcc))  in current_brightness_show()
688 	return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_CUR_BRIGHT]);  in current_brightness_show()
695 	struct pcc_acpi *pcc = acpi_driver_data(acpi);  in current_brightness_store()  local
703 		err = acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, val);  in current_brightness_store()
704 		pcc->current_brightness = val;  in current_brightness_store()
760 static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)  in acpi_pcc_generate_keyinput()  argument
762 	struct input_dev *hotk_input_dev = pcc->input_dev;  in acpi_pcc_generate_keyinput()
766 	rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY,  in acpi_pcc_generate_keyinput()
791 	struct pcc_acpi *pcc = acpi_driver_data(device);  in acpi_pcc_hotkey_notify()  local
795 		acpi_pcc_generate_keyinput(pcc);  in acpi_pcc_hotkey_notify()
811 static int pcc_register_optd_notifier(struct pcc_acpi *pcc, char *node)  in pcc_register_optd_notifier()  argument
821 				pcc_optd_notify, pcc);  in pcc_register_optd_notifier()
830 static void pcc_unregister_optd_notifier(struct pcc_acpi *pcc, char *node)  in pcc_unregister_optd_notifier()  argument
847 static int acpi_pcc_init_input(struct pcc_acpi *pcc)  in acpi_pcc_init_input()  argument
875 	pcc->input_dev = input_dev;  in acpi_pcc_init_input()
888 	struct pcc_acpi *pcc;  in acpi_pcc_hotkey_resume()  local
893 	pcc = acpi_driver_data(to_acpi_device(dev));  in acpi_pcc_hotkey_resume()
894 	if (!pcc)  in acpi_pcc_hotkey_resume()
897 	acpi_pcc_write_sset(pcc, SINF_MUTE, pcc->mute);  in acpi_pcc_hotkey_resume()
898 	acpi_pcc_write_sset(pcc, SINF_ECO_MODE, pcc->eco_mode);  in acpi_pcc_hotkey_resume()
899 	acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_key);  in acpi_pcc_hotkey_resume()
900 	acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, pcc->ac_brightness);  in acpi_pcc_hotkey_resume()
901 	acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, pcc->dc_brightness);  in acpi_pcc_hotkey_resume()
902 	acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, pcc->current_brightness);  in acpi_pcc_hotkey_resume()
911 	struct pcc_acpi *pcc;  in acpi_pcc_hotkey_add()  local
924 	pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL);  in acpi_pcc_hotkey_add()
925 	if (!pcc) {  in acpi_pcc_hotkey_add()
926 		pr_err("Couldn't allocate mem for pcc");  in acpi_pcc_hotkey_add()
930 	pcc->sinf = kcalloc(num_sifr + 1, sizeof(u32), GFP_KERNEL);  in acpi_pcc_hotkey_add()
931 	if (!pcc->sinf) {  in acpi_pcc_hotkey_add()
936 	pcc->device = device;  in acpi_pcc_hotkey_add()
937 	pcc->handle = device->handle;  in acpi_pcc_hotkey_add()
938 	pcc->num_sifr = num_sifr;  in acpi_pcc_hotkey_add()
939 	device->driver_data = pcc;  in acpi_pcc_hotkey_add()
943 	result = acpi_pcc_init_input(pcc);  in acpi_pcc_hotkey_add()
949 	if (!acpi_pcc_retrieve_biosdata(pcc)) {  in acpi_pcc_hotkey_add()
957 	props.max_brightness = pcc->sinf[SINF_AC_MAX_BRIGHT];  in acpi_pcc_hotkey_add()
958 	pcc->backlight = backlight_device_register("panasonic", NULL, pcc,  in acpi_pcc_hotkey_add()
960 	if (IS_ERR(pcc->backlight)) {  in acpi_pcc_hotkey_add()
961 		result = PTR_ERR(pcc->backlight);  in acpi_pcc_hotkey_add()
966 	pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];  in acpi_pcc_hotkey_add()
969 	acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, 0);  in acpi_pcc_hotkey_add()
970 	pcc->sticky_key = 0;  in acpi_pcc_hotkey_add()
972 	pcc->eco_mode = pcc->sinf[SINF_ECO_MODE];  in acpi_pcc_hotkey_add()
973 	pcc->mute = pcc->sinf[SINF_MUTE];  in acpi_pcc_hotkey_add()
974 	pcc->ac_brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];  in acpi_pcc_hotkey_add()
975 	pcc->dc_brightness = pcc->sinf[SINF_DC_CUR_BRIGHT];  in acpi_pcc_hotkey_add()
976 	pcc->current_brightness = pcc->sinf[SINF_CUR_BRIGHT];  in acpi_pcc_hotkey_add()
985 		pcc->platform = platform_device_register_simple("panasonic",  in acpi_pcc_hotkey_add()
987 		if (IS_ERR(pcc->platform)) {  in acpi_pcc_hotkey_add()
988 			result = PTR_ERR(pcc->platform);  in acpi_pcc_hotkey_add()
991 		result = device_create_file(&pcc->platform->dev,  in acpi_pcc_hotkey_add()
993 		pcc_register_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD");  in acpi_pcc_hotkey_add()
997 		pcc->platform = NULL;  in acpi_pcc_hotkey_add()
1003 	platform_device_unregister(pcc->platform);  in acpi_pcc_hotkey_add()
1005 	backlight_device_unregister(pcc->backlight);  in acpi_pcc_hotkey_add()
1007 	input_unregister_device(pcc->input_dev);  in acpi_pcc_hotkey_add()
1009 	kfree(pcc->sinf);  in acpi_pcc_hotkey_add()
1011 	kfree(pcc);  in acpi_pcc_hotkey_add()
1018 	struct pcc_acpi *pcc = acpi_driver_data(device);  in acpi_pcc_hotkey_remove()  local
1020 	if (!device || !pcc)  in acpi_pcc_hotkey_remove()
1023 	if (pcc->platform) {  in acpi_pcc_hotkey_remove()
1024 		device_remove_file(&pcc->platform->dev, &dev_attr_cdpower);  in acpi_pcc_hotkey_remove()
1025 		platform_device_unregister(pcc->platform);  in acpi_pcc_hotkey_remove()
1027 	pcc_unregister_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD");  in acpi_pcc_hotkey_remove()
1031 	backlight_device_unregister(pcc->backlight);  in acpi_pcc_hotkey_remove()
1033 	input_unregister_device(pcc->input_dev);  in acpi_pcc_hotkey_remove()
1035 	kfree(pcc->sinf);  in acpi_pcc_hotkey_remove()
1036 	kfree(pcc);  in acpi_pcc_hotkey_remove()