105 static u8 gmux_pio_read8(struct apple_gmux_data *gmux_data, int port)  in gmux_pio_read8()  argument
107 	return inb(gmux_data->iostart + port);  in gmux_pio_read8()
110 static void gmux_pio_write8(struct apple_gmux_data *gmux_data, int port,  in gmux_pio_write8()  argument
113 	outb(val, gmux_data->iostart + port);  in gmux_pio_write8()
116 static u32 gmux_pio_read32(struct apple_gmux_data *gmux_data, int port)  in gmux_pio_read32()  argument
118 	return inl(gmux_data->iostart + port);  in gmux_pio_read32()
121 static void gmux_pio_write32(struct apple_gmux_data *gmux_data, int port,  in gmux_pio_write32()  argument
129 		outb(tmpval, gmux_data->iostart + port + i);  in gmux_pio_write32()
133 static int gmux_index_wait_ready(struct apple_gmux_data *gmux_data)  in gmux_index_wait_ready()  argument
136 	u8 gwr = inb(gmux_data->iostart + GMUX_PORT_WRITE);  in gmux_index_wait_ready()
139 		inb(gmux_data->iostart + GMUX_PORT_READ);  in gmux_index_wait_ready()
140 		gwr = inb(gmux_data->iostart + GMUX_PORT_WRITE);  in gmux_index_wait_ready()
148 static int gmux_index_wait_complete(struct apple_gmux_data *gmux_data)  in gmux_index_wait_complete()  argument
151 	u8 gwr = inb(gmux_data->iostart + GMUX_PORT_WRITE);  in gmux_index_wait_complete()
154 		gwr = inb(gmux_data->iostart + GMUX_PORT_WRITE);  in gmux_index_wait_complete()
160 		inb(gmux_data->iostart + GMUX_PORT_READ);  in gmux_index_wait_complete()
165 static u8 gmux_index_read8(struct apple_gmux_data *gmux_data, int port)  in gmux_index_read8()  argument
169 	mutex_lock(&gmux_data->index_lock);  in gmux_index_read8()
170 	gmux_index_wait_ready(gmux_data);  in gmux_index_read8()
171 	outb((port & 0xff), gmux_data->iostart + GMUX_PORT_READ);  in gmux_index_read8()
172 	gmux_index_wait_complete(gmux_data);  in gmux_index_read8()
173 	val = inb(gmux_data->iostart + GMUX_PORT_VALUE);  in gmux_index_read8()
174 	mutex_unlock(&gmux_data->index_lock);  in gmux_index_read8()
179 static void gmux_index_write8(struct apple_gmux_data *gmux_data, int port,  in gmux_index_write8()  argument
182 	mutex_lock(&gmux_data->index_lock);  in gmux_index_write8()
183 	outb(val, gmux_data->iostart + GMUX_PORT_VALUE);  in gmux_index_write8()
184 	gmux_index_wait_ready(gmux_data);  in gmux_index_write8()
185 	outb(port & 0xff, gmux_data->iostart + GMUX_PORT_WRITE);  in gmux_index_write8()
186 	gmux_index_wait_complete(gmux_data);  in gmux_index_write8()
187 	mutex_unlock(&gmux_data->index_lock);  in gmux_index_write8()
190 static u32 gmux_index_read32(struct apple_gmux_data *gmux_data, int port)  in gmux_index_read32()  argument
194 	mutex_lock(&gmux_data->index_lock);  in gmux_index_read32()
195 	gmux_index_wait_ready(gmux_data);  in gmux_index_read32()
196 	outb((port & 0xff), gmux_data->iostart + GMUX_PORT_READ);  in gmux_index_read32()
197 	gmux_index_wait_complete(gmux_data);  in gmux_index_read32()
198 	val = inl(gmux_data->iostart + GMUX_PORT_VALUE);  in gmux_index_read32()
199 	mutex_unlock(&gmux_data->index_lock);  in gmux_index_read32()
204 static void gmux_index_write32(struct apple_gmux_data *gmux_data, int port,  in gmux_index_write32()  argument
210 	mutex_lock(&gmux_data->index_lock);  in gmux_index_write32()
214 		outb(tmpval, gmux_data->iostart + GMUX_PORT_VALUE + i);  in gmux_index_write32()
217 	gmux_index_wait_ready(gmux_data);  in gmux_index_write32()
218 	outb(port & 0xff, gmux_data->iostart + GMUX_PORT_WRITE);  in gmux_index_write32()
219 	gmux_index_wait_complete(gmux_data);  in gmux_index_write32()
220 	mutex_unlock(&gmux_data->index_lock);  in gmux_index_write32()
223 static u8 gmux_read8(struct apple_gmux_data *gmux_data, int port)  in gmux_read8()  argument
225 	if (gmux_data->indexed)  in gmux_read8()
226 		return gmux_index_read8(gmux_data, port);  in gmux_read8()
228 		return gmux_pio_read8(gmux_data, port);  in gmux_read8()
231 static void gmux_write8(struct apple_gmux_data *gmux_data, int port, u8 val)  in gmux_write8()  argument
233 	if (gmux_data->indexed)  in gmux_write8()
234 		gmux_index_write8(gmux_data, port, val);  in gmux_write8()
236 		gmux_pio_write8(gmux_data, port, val);  in gmux_write8()
239 static u32 gmux_read32(struct apple_gmux_data *gmux_data, int port)  in gmux_read32()  argument
241 	if (gmux_data->indexed)  in gmux_read32()
242 		return gmux_index_read32(gmux_data, port);  in gmux_read32()
244 		return gmux_pio_read32(gmux_data, port);  in gmux_read32()
247 static void gmux_write32(struct apple_gmux_data *gmux_data, int port,  in gmux_write32()  argument
250 	if (gmux_data->indexed)  in gmux_write32()
251 		gmux_index_write32(gmux_data, port, val);  in gmux_write32()
253 		gmux_pio_write32(gmux_data, port, val);  in gmux_write32()
256 static bool gmux_is_indexed(struct apple_gmux_data *gmux_data)  in gmux_is_indexed()  argument
260 	outb(0xaa, gmux_data->iostart + 0xcc);  in gmux_is_indexed()
261 	outb(0x55, gmux_data->iostart + 0xcd);  in gmux_is_indexed()
262 	outb(0x00, gmux_data->iostart + 0xce);  in gmux_is_indexed()
264 	val = inb(gmux_data->iostart + 0xcc) |  in gmux_is_indexed()
265 		(inb(gmux_data->iostart + 0xcd) << 8);  in gmux_is_indexed()
289 	struct apple_gmux_data *gmux_data = bl_get_data(bd);  in gmux_get_brightness()  local
290 	return gmux_read32(gmux_data, GMUX_PORT_BRIGHTNESS) &  in gmux_get_brightness()
296 	struct apple_gmux_data *gmux_data = bl_get_data(bd);  in gmux_update_status()  local
302 	gmux_write32(gmux_data, GMUX_PORT_BRIGHTNESS, brightness);  in gmux_update_status()
389 static void gmux_read_switch_state(struct apple_gmux_data *gmux_data)  in gmux_read_switch_state()  argument
391 	if (gmux_read8(gmux_data, GMUX_PORT_SWITCH_DDC) == 1)  in gmux_read_switch_state()
392 		gmux_data->switch_state_ddc = VGA_SWITCHEROO_IGD;  in gmux_read_switch_state()
394 		gmux_data->switch_state_ddc = VGA_SWITCHEROO_DIS;  in gmux_read_switch_state()
396 	if (gmux_read8(gmux_data, GMUX_PORT_SWITCH_DISPLAY) == 2)  in gmux_read_switch_state()
397 		gmux_data->switch_state_display = VGA_SWITCHEROO_IGD;  in gmux_read_switch_state()
399 		gmux_data->switch_state_display = VGA_SWITCHEROO_DIS;  in gmux_read_switch_state()
401 	if (gmux_read8(gmux_data, GMUX_PORT_SWITCH_EXTERNAL) == 2)  in gmux_read_switch_state()
402 		gmux_data->switch_state_external = VGA_SWITCHEROO_IGD;  in gmux_read_switch_state()
404 		gmux_data->switch_state_external = VGA_SWITCHEROO_DIS;  in gmux_read_switch_state()
407 static void gmux_write_switch_state(struct apple_gmux_data *gmux_data)  in gmux_write_switch_state()  argument
409 	if (gmux_data->switch_state_ddc == VGA_SWITCHEROO_IGD)  in gmux_write_switch_state()
410 		gmux_write8(gmux_data, GMUX_PORT_SWITCH_DDC, 1);  in gmux_write_switch_state()
412 		gmux_write8(gmux_data, GMUX_PORT_SWITCH_DDC, 2);  in gmux_write_switch_state()
414 	if (gmux_data->switch_state_display == VGA_SWITCHEROO_IGD)  in gmux_write_switch_state()
415 		gmux_write8(gmux_data, GMUX_PORT_SWITCH_DISPLAY, 2);  in gmux_write_switch_state()
417 		gmux_write8(gmux_data, GMUX_PORT_SWITCH_DISPLAY, 3);  in gmux_write_switch_state()
419 	if (gmux_data->switch_state_external == VGA_SWITCHEROO_IGD)  in gmux_write_switch_state()
420 		gmux_write8(gmux_data, GMUX_PORT_SWITCH_EXTERNAL, 2);  in gmux_write_switch_state()
422 		gmux_write8(gmux_data, GMUX_PORT_SWITCH_EXTERNAL, 3);  in gmux_write_switch_state()
464 static int gmux_set_discrete_state(struct apple_gmux_data *gmux_data,  in gmux_set_discrete_state()  argument
467 	reinit_completion(&gmux_data->powerchange_done);  in gmux_set_discrete_state()
470 		gmux_write8(gmux_data, GMUX_PORT_DISCRETE_POWER, 1);  in gmux_set_discrete_state()
471 		gmux_write8(gmux_data, GMUX_PORT_DISCRETE_POWER, 3);  in gmux_set_discrete_state()
474 		gmux_write8(gmux_data, GMUX_PORT_DISCRETE_POWER, 1);  in gmux_set_discrete_state()
475 		gmux_write8(gmux_data, GMUX_PORT_DISCRETE_POWER, 0);  in gmux_set_discrete_state()
479 	gmux_data->power_state = state;  in gmux_set_discrete_state()
481 	if (gmux_data->gpe >= 0 &&  in gmux_set_discrete_state()
482 	    !wait_for_completion_interruptible_timeout(&gmux_data->powerchange_done,  in gmux_set_discrete_state()
536 static inline void gmux_disable_interrupts(struct apple_gmux_data *gmux_data)  in gmux_disable_interrupts()  argument
538 	gmux_write8(gmux_data, GMUX_PORT_INTERRUPT_ENABLE,  in gmux_disable_interrupts()
542 static inline void gmux_enable_interrupts(struct apple_gmux_data *gmux_data)  in gmux_enable_interrupts()  argument
544 	gmux_write8(gmux_data, GMUX_PORT_INTERRUPT_ENABLE,  in gmux_enable_interrupts()
548 static inline u8 gmux_interrupt_get_status(struct apple_gmux_data *gmux_data)  in gmux_interrupt_get_status()  argument
550 	return gmux_read8(gmux_data, GMUX_PORT_INTERRUPT_STATUS);  in gmux_interrupt_get_status()
553 static void gmux_clear_interrupts(struct apple_gmux_data *gmux_data)  in gmux_clear_interrupts()  argument
558 	status = gmux_interrupt_get_status(gmux_data);  in gmux_clear_interrupts()
559 	gmux_write8(gmux_data, GMUX_PORT_INTERRUPT_STATUS, status);  in gmux_clear_interrupts()
566 	struct apple_gmux_data *gmux_data = pnp_get_drvdata(pnp);  in gmux_notify_handler()  local
568 	status = gmux_interrupt_get_status(gmux_data);  in gmux_notify_handler()
569 	gmux_disable_interrupts(gmux_data);  in gmux_notify_handler()
572 	gmux_clear_interrupts(gmux_data);  in gmux_notify_handler()
573 	gmux_enable_interrupts(gmux_data);  in gmux_notify_handler()
576 		complete(&gmux_data->powerchange_done);  in gmux_notify_handler()
582 	struct apple_gmux_data *gmux_data = pnp_get_drvdata(pnp);  in gmux_suspend()  local
584 	gmux_disable_interrupts(gmux_data);  in gmux_suspend()
591 	struct apple_gmux_data *gmux_data = pnp_get_drvdata(pnp);  in gmux_resume()  local
593 	gmux_enable_interrupts(gmux_data);  in gmux_resume()
594 	gmux_write_switch_state(gmux_data);  in gmux_resume()
595 	if (gmux_data->power_state == VGA_SWITCHEROO_OFF)  in gmux_resume()
596 		gmux_set_discrete_state(gmux_data, gmux_data->power_state);  in gmux_resume()
607 	struct apple_gmux_data *gmux_data;  in gmux_probe()  local
619 	gmux_data = kzalloc(sizeof(*gmux_data), GFP_KERNEL);  in gmux_probe()
620 	if (!gmux_data)  in gmux_probe()
622 	pnp_set_drvdata(pnp, gmux_data);  in gmux_probe()
630 	gmux_data->iostart = res->start;  in gmux_probe()
631 	gmux_data->iolen = res->end - res->start;  in gmux_probe()
633 	if (gmux_data->iolen < GMUX_MIN_IO_LEN) {  in gmux_probe()
635 		       gmux_data->iolen, GMUX_MIN_IO_LEN);  in gmux_probe()
639 	if (!request_region(gmux_data->iostart, gmux_data->iolen,  in gmux_probe()
651 	ver_major = gmux_read8(gmux_data, GMUX_PORT_VERSION_MAJOR);  in gmux_probe()
652 	ver_minor = gmux_read8(gmux_data, GMUX_PORT_VERSION_MINOR);  in gmux_probe()
653 	ver_release = gmux_read8(gmux_data, GMUX_PORT_VERSION_RELEASE);  in gmux_probe()
655 		if (gmux_is_indexed(gmux_data)) {  in gmux_probe()
657 			mutex_init(&gmux_data->index_lock);  in gmux_probe()
658 			gmux_data->indexed = true;  in gmux_probe()
659 			version = gmux_read32(gmux_data,  in gmux_probe()
671 		ver_release, (gmux_data->indexed ? "indexed" : "classic"));  in gmux_probe()
675 	props.max_brightness = gmux_read32(gmux_data, GMUX_PORT_MAX_BRIGHTNESS);  in gmux_probe()
687 					 gmux_data, &gmux_bl_ops, &props);  in gmux_probe()
693 	gmux_data->bdev = bdev;  in gmux_probe()
706 	gmux_data->power_state = VGA_SWITCHEROO_ON;  in gmux_probe()
708 	gmux_data->dhandle = ACPI_HANDLE(&pnp->dev);  in gmux_probe()
709 	if (!gmux_data->dhandle) {  in gmux_probe()
716 	status = acpi_evaluate_integer(gmux_data->dhandle, "GMGP", NULL, &gpe);  in gmux_probe()
718 		gmux_data->gpe = (int)gpe;  in gmux_probe()
720 		status = acpi_install_notify_handler(gmux_data->dhandle,  in gmux_probe()
730 		status = acpi_enable_gpe(NULL, gmux_data->gpe);  in gmux_probe()
738 		gmux_data->gpe = -1;  in gmux_probe()
745 	gmux_data->external_switchable =  in gmux_probe()
747 	if (!gmux_data->external_switchable)  in gmux_probe()
748 		gmux_write8(gmux_data, GMUX_PORT_SWITCH_EXTERNAL, 3);  in gmux_probe()
750 	apple_gmux_data = gmux_data;  in gmux_probe()
751 	init_completion(&gmux_data->powerchange_done);  in gmux_probe()
752 	gmux_enable_interrupts(gmux_data);  in gmux_probe()
753 	gmux_read_switch_state(gmux_data);  in gmux_probe()
762 	if (gmux_data->indexed)  in gmux_probe()
776 	gmux_disable_interrupts(gmux_data);  in gmux_probe()
778 	if (gmux_data->gpe >= 0)  in gmux_probe()
779 		acpi_disable_gpe(NULL, gmux_data->gpe);  in gmux_probe()
781 	if (gmux_data->gpe >= 0)  in gmux_probe()
782 		acpi_remove_notify_handler(gmux_data->dhandle,  in gmux_probe()
788 	release_region(gmux_data->iostart, gmux_data->iolen);  in gmux_probe()
790 	kfree(gmux_data);  in gmux_probe()
796 	struct apple_gmux_data *gmux_data = pnp_get_drvdata(pnp);  in gmux_remove()  local
799 	gmux_disable_interrupts(gmux_data);  in gmux_remove()
800 	if (gmux_data->gpe >= 0) {  in gmux_remove()
801 		acpi_disable_gpe(NULL, gmux_data->gpe);  in gmux_remove()
802 		acpi_remove_notify_handler(gmux_data->dhandle,  in gmux_remove()
807 	backlight_device_unregister(gmux_data->bdev);  in gmux_remove()
809 	release_region(gmux_data->iostart, gmux_data->iolen);  in gmux_remove()
811 	kfree(gmux_data);  in gmux_remove()