82 static u8 gmux_pio_read8(struct apple_gmux_data *gmux_data, int port)  in gmux_pio_read8()  argument
84 	return inb(gmux_data->iostart + port);  in gmux_pio_read8()
87 static void gmux_pio_write8(struct apple_gmux_data *gmux_data, int port,  in gmux_pio_write8()  argument
90 	outb(val, gmux_data->iostart + port);  in gmux_pio_write8()
93 static u32 gmux_pio_read32(struct apple_gmux_data *gmux_data, int port)  in gmux_pio_read32()  argument
95 	return inl(gmux_data->iostart + port);  in gmux_pio_read32()
98 static void gmux_pio_write32(struct apple_gmux_data *gmux_data, int port,  in gmux_pio_write32()  argument
106 		outb(tmpval, gmux_data->iostart + port + i);  in gmux_pio_write32()
110 static int gmux_index_wait_ready(struct apple_gmux_data *gmux_data)  in gmux_index_wait_ready()  argument
113 	u8 gwr = inb(gmux_data->iostart + GMUX_PORT_WRITE);  in gmux_index_wait_ready()
116 		inb(gmux_data->iostart + GMUX_PORT_READ);  in gmux_index_wait_ready()
117 		gwr = inb(gmux_data->iostart + GMUX_PORT_WRITE);  in gmux_index_wait_ready()
125 static int gmux_index_wait_complete(struct apple_gmux_data *gmux_data)  in gmux_index_wait_complete()  argument
128 	u8 gwr = inb(gmux_data->iostart + GMUX_PORT_WRITE);  in gmux_index_wait_complete()
131 		gwr = inb(gmux_data->iostart + GMUX_PORT_WRITE);  in gmux_index_wait_complete()
137 		inb(gmux_data->iostart + GMUX_PORT_READ);  in gmux_index_wait_complete()
142 static u8 gmux_index_read8(struct apple_gmux_data *gmux_data, int port)  in gmux_index_read8()  argument
146 	mutex_lock(&gmux_data->index_lock);  in gmux_index_read8()
147 	gmux_index_wait_ready(gmux_data);  in gmux_index_read8()
148 	outb((port & 0xff), gmux_data->iostart + GMUX_PORT_READ);  in gmux_index_read8()
149 	gmux_index_wait_complete(gmux_data);  in gmux_index_read8()
150 	val = inb(gmux_data->iostart + GMUX_PORT_VALUE);  in gmux_index_read8()
151 	mutex_unlock(&gmux_data->index_lock);  in gmux_index_read8()
156 static void gmux_index_write8(struct apple_gmux_data *gmux_data, int port,  in gmux_index_write8()  argument
159 	mutex_lock(&gmux_data->index_lock);  in gmux_index_write8()
160 	outb(val, gmux_data->iostart + GMUX_PORT_VALUE);  in gmux_index_write8()
161 	gmux_index_wait_ready(gmux_data);  in gmux_index_write8()
162 	outb(port & 0xff, gmux_data->iostart + GMUX_PORT_WRITE);  in gmux_index_write8()
163 	gmux_index_wait_complete(gmux_data);  in gmux_index_write8()
164 	mutex_unlock(&gmux_data->index_lock);  in gmux_index_write8()
167 static u32 gmux_index_read32(struct apple_gmux_data *gmux_data, int port)  in gmux_index_read32()  argument
171 	mutex_lock(&gmux_data->index_lock);  in gmux_index_read32()
172 	gmux_index_wait_ready(gmux_data);  in gmux_index_read32()
173 	outb((port & 0xff), gmux_data->iostart + GMUX_PORT_READ);  in gmux_index_read32()
174 	gmux_index_wait_complete(gmux_data);  in gmux_index_read32()
175 	val = inl(gmux_data->iostart + GMUX_PORT_VALUE);  in gmux_index_read32()
176 	mutex_unlock(&gmux_data->index_lock);  in gmux_index_read32()
181 static void gmux_index_write32(struct apple_gmux_data *gmux_data, int port,  in gmux_index_write32()  argument
187 	mutex_lock(&gmux_data->index_lock);  in gmux_index_write32()
191 		outb(tmpval, gmux_data->iostart + GMUX_PORT_VALUE + i);  in gmux_index_write32()
194 	gmux_index_wait_ready(gmux_data);  in gmux_index_write32()
195 	outb(port & 0xff, gmux_data->iostart + GMUX_PORT_WRITE);  in gmux_index_write32()
196 	gmux_index_wait_complete(gmux_data);  in gmux_index_write32()
197 	mutex_unlock(&gmux_data->index_lock);  in gmux_index_write32()
200 static u8 gmux_read8(struct apple_gmux_data *gmux_data, int port)  in gmux_read8()  argument
202 	if (gmux_data->indexed)  in gmux_read8()
203 		return gmux_index_read8(gmux_data, port);  in gmux_read8()
205 		return gmux_pio_read8(gmux_data, port);  in gmux_read8()
208 static void gmux_write8(struct apple_gmux_data *gmux_data, int port, u8 val)  in gmux_write8()  argument
210 	if (gmux_data->indexed)  in gmux_write8()
211 		gmux_index_write8(gmux_data, port, val);  in gmux_write8()
213 		gmux_pio_write8(gmux_data, port, val);  in gmux_write8()
216 static u32 gmux_read32(struct apple_gmux_data *gmux_data, int port)  in gmux_read32()  argument
218 	if (gmux_data->indexed)  in gmux_read32()
219 		return gmux_index_read32(gmux_data, port);  in gmux_read32()
221 		return gmux_pio_read32(gmux_data, port);  in gmux_read32()
224 static void gmux_write32(struct apple_gmux_data *gmux_data, int port,  in gmux_write32()  argument
227 	if (gmux_data->indexed)  in gmux_write32()
228 		gmux_index_write32(gmux_data, port, val);  in gmux_write32()
230 		gmux_pio_write32(gmux_data, port, val);  in gmux_write32()
233 static bool gmux_is_indexed(struct apple_gmux_data *gmux_data)  in gmux_is_indexed()  argument
237 	outb(0xaa, gmux_data->iostart + 0xcc);  in gmux_is_indexed()
238 	outb(0x55, gmux_data->iostart + 0xcd);  in gmux_is_indexed()
239 	outb(0x00, gmux_data->iostart + 0xce);  in gmux_is_indexed()
241 	val = inb(gmux_data->iostart + 0xcc) |  in gmux_is_indexed()
242 		(inb(gmux_data->iostart + 0xcd) << 8);  in gmux_is_indexed()
252 	struct apple_gmux_data *gmux_data = bl_get_data(bd);  in gmux_get_brightness()  local
253 	return gmux_read32(gmux_data, GMUX_PORT_BRIGHTNESS) &  in gmux_get_brightness()
259 	struct apple_gmux_data *gmux_data = bl_get_data(bd);  in gmux_update_status()  local
265 	gmux_write32(gmux_data, GMUX_PORT_BRIGHTNESS, brightness);  in gmux_update_status()
291 static int gmux_set_discrete_state(struct apple_gmux_data *gmux_data,  in gmux_set_discrete_state()  argument
294 	reinit_completion(&gmux_data->powerchange_done);  in gmux_set_discrete_state()
297 		gmux_write8(gmux_data, GMUX_PORT_DISCRETE_POWER, 1);  in gmux_set_discrete_state()
298 		gmux_write8(gmux_data, GMUX_PORT_DISCRETE_POWER, 3);  in gmux_set_discrete_state()
301 		gmux_write8(gmux_data, GMUX_PORT_DISCRETE_POWER, 1);  in gmux_set_discrete_state()
302 		gmux_write8(gmux_data, GMUX_PORT_DISCRETE_POWER, 0);  in gmux_set_discrete_state()
306 	gmux_data->power_state = state;  in gmux_set_discrete_state()
308 	if (gmux_data->gpe >= 0 &&  in gmux_set_discrete_state()
309 	    !wait_for_completion_interruptible_timeout(&gmux_data->powerchange_done,  in gmux_set_discrete_state()
341 gmux_active_client(struct apple_gmux_data *gmux_data)  in gmux_active_client()  argument
343 	if (gmux_read8(gmux_data, GMUX_PORT_SWITCH_DISPLAY) == 2)  in gmux_active_client()
355 static inline void gmux_disable_interrupts(struct apple_gmux_data *gmux_data)  in gmux_disable_interrupts()  argument
357 	gmux_write8(gmux_data, GMUX_PORT_INTERRUPT_ENABLE,  in gmux_disable_interrupts()
361 static inline void gmux_enable_interrupts(struct apple_gmux_data *gmux_data)  in gmux_enable_interrupts()  argument
363 	gmux_write8(gmux_data, GMUX_PORT_INTERRUPT_ENABLE,  in gmux_enable_interrupts()
367 static inline u8 gmux_interrupt_get_status(struct apple_gmux_data *gmux_data)  in gmux_interrupt_get_status()  argument
369 	return gmux_read8(gmux_data, GMUX_PORT_INTERRUPT_STATUS);  in gmux_interrupt_get_status()
372 static void gmux_clear_interrupts(struct apple_gmux_data *gmux_data)  in gmux_clear_interrupts()  argument
377 	status = gmux_interrupt_get_status(gmux_data);  in gmux_clear_interrupts()
378 	gmux_write8(gmux_data, GMUX_PORT_INTERRUPT_STATUS, status);  in gmux_clear_interrupts()
385 	struct apple_gmux_data *gmux_data = pnp_get_drvdata(pnp);  in gmux_notify_handler()  local
387 	status = gmux_interrupt_get_status(gmux_data);  in gmux_notify_handler()
388 	gmux_disable_interrupts(gmux_data);  in gmux_notify_handler()
391 	gmux_clear_interrupts(gmux_data);  in gmux_notify_handler()
392 	gmux_enable_interrupts(gmux_data);  in gmux_notify_handler()
395 		complete(&gmux_data->powerchange_done);  in gmux_notify_handler()
401 	struct apple_gmux_data *gmux_data = pnp_get_drvdata(pnp);  in gmux_suspend()  local
403 	gmux_data->resume_client_id = gmux_active_client(gmux_data);  in gmux_suspend()
404 	gmux_disable_interrupts(gmux_data);  in gmux_suspend()
411 	struct apple_gmux_data *gmux_data = pnp_get_drvdata(pnp);  in gmux_resume()  local
413 	gmux_enable_interrupts(gmux_data);  in gmux_resume()
414 	gmux_switchto(gmux_data->resume_client_id);  in gmux_resume()
415 	if (gmux_data->power_state == VGA_SWITCHEROO_OFF)  in gmux_resume()
416 		gmux_set_discrete_state(gmux_data, gmux_data->power_state);  in gmux_resume()
439 	struct apple_gmux_data *gmux_data;  in gmux_probe()  local
452 	gmux_data = kzalloc(sizeof(*gmux_data), GFP_KERNEL);  in gmux_probe()
453 	if (!gmux_data)  in gmux_probe()
455 	pnp_set_drvdata(pnp, gmux_data);  in gmux_probe()
463 	gmux_data->iostart = res->start;  in gmux_probe()
464 	gmux_data->iolen = res->end - res->start;  in gmux_probe()
466 	if (gmux_data->iolen < GMUX_MIN_IO_LEN) {  in gmux_probe()
468 		       gmux_data->iolen, GMUX_MIN_IO_LEN);  in gmux_probe()
472 	if (!request_region(gmux_data->iostart, gmux_data->iolen,  in gmux_probe()
484 	ver_major = gmux_read8(gmux_data, GMUX_PORT_VERSION_MAJOR);  in gmux_probe()
485 	ver_minor = gmux_read8(gmux_data, GMUX_PORT_VERSION_MINOR);  in gmux_probe()
486 	ver_release = gmux_read8(gmux_data, GMUX_PORT_VERSION_RELEASE);  in gmux_probe()
488 		if (gmux_is_indexed(gmux_data)) {  in gmux_probe()
490 			mutex_init(&gmux_data->index_lock);  in gmux_probe()
491 			gmux_data->indexed = true;  in gmux_probe()
492 			version = gmux_read32(gmux_data,  in gmux_probe()
504 		ver_release, (gmux_data->indexed ? "indexed" : "classic"));  in gmux_probe()
521 	gmux_data->pdev = pdev;  in gmux_probe()
525 	props.max_brightness = gmux_read32(gmux_data, GMUX_PORT_MAX_BRIGHTNESS);  in gmux_probe()
537 					 gmux_data, &gmux_bl_ops, &props);  in gmux_probe()
543 	gmux_data->bdev = bdev;  in gmux_probe()
557 	gmux_data->power_state = VGA_SWITCHEROO_ON;  in gmux_probe()
559 	gmux_data->dhandle = ACPI_HANDLE(&pnp->dev);  in gmux_probe()
560 	if (!gmux_data->dhandle) {  in gmux_probe()
567 	status = acpi_evaluate_integer(gmux_data->dhandle, "GMGP", NULL, &gpe);  in gmux_probe()
569 		gmux_data->gpe = (int)gpe;  in gmux_probe()
571 		status = acpi_install_notify_handler(gmux_data->dhandle,  in gmux_probe()
581 		status = acpi_enable_gpe(NULL, gmux_data->gpe);  in gmux_probe()
589 		gmux_data->gpe = -1;  in gmux_probe()
597 	init_completion(&gmux_data->powerchange_done);  in gmux_probe()
598 	apple_gmux_data = gmux_data;  in gmux_probe()
599 	gmux_enable_interrupts(gmux_data);  in gmux_probe()
604 	if (gmux_data->gpe >= 0)  in gmux_probe()
605 		acpi_disable_gpe(NULL, gmux_data->gpe);  in gmux_probe()
607 	if (gmux_data->gpe >= 0)  in gmux_probe()
608 		acpi_remove_notify_handler(gmux_data->dhandle,  in gmux_probe()
614 	if (gmux_data->pdev)  in gmux_probe()
615 		vga_put(gmux_data->pdev,  in gmux_probe()
618 	release_region(gmux_data->iostart, gmux_data->iolen);  in gmux_probe()
620 	kfree(gmux_data);  in gmux_probe()
626 	struct apple_gmux_data *gmux_data = pnp_get_drvdata(pnp);  in gmux_remove()  local
629 	gmux_disable_interrupts(gmux_data);  in gmux_remove()
630 	if (gmux_data->gpe >= 0) {  in gmux_remove()
631 		acpi_disable_gpe(NULL, gmux_data->gpe);  in gmux_remove()
632 		acpi_remove_notify_handler(gmux_data->dhandle,  in gmux_remove()
637 	if (gmux_data->pdev) {  in gmux_remove()
638 		vga_put(gmux_data->pdev,  in gmux_remove()
640 		pci_dev_put(gmux_data->pdev);  in gmux_remove()
642 	backlight_device_unregister(gmux_data->bdev);  in gmux_remove()
644 	release_region(gmux_data->iostart, gmux_data->iolen);  in gmux_remove()
646 	kfree(gmux_data);  in gmux_remove()