14 #include "ipa.h"
21  * DOC: IPA Power Management
23  * The IPA hardware is enabled when the IPA core clock and all the
36  * struct ipa_interconnect - IPA interconnect information
48  * enum ipa_power_flag - IPA power flags
64  * struct ipa_power - IPA power management information
65  * @dev:		IPA device pointer
66  * @core:		IPA core clock
110 /* Initialize interconnects required for IPA operation */
155 static int ipa_interconnect_enable(struct ipa *ipa)  in ipa_interconnect_enable()  argument
158 	struct ipa_power *power = ipa->power;  in ipa_interconnect_enable()
168 			dev_err(&ipa->pdev->dev,  in ipa_interconnect_enable()
186 static int ipa_interconnect_disable(struct ipa *ipa)  in ipa_interconnect_disable()  argument
189 	struct ipa_power *power = ipa->power;  in ipa_interconnect_disable()
190 	struct device *dev = &ipa->pdev->dev;  in ipa_interconnect_disable()
212 /* Enable IPA power, enabling interconnects and the core clock */
213 static int ipa_power_enable(struct ipa *ipa)  in ipa_power_enable()  argument
217 	ret = ipa_interconnect_enable(ipa);  in ipa_power_enable()
221 	ret = clk_prepare_enable(ipa->power->core);  in ipa_power_enable()
223 		dev_err(&ipa->pdev->dev, "error %d enabling core clock\n", ret);  in ipa_power_enable()
224 		(void)ipa_interconnect_disable(ipa);  in ipa_power_enable()
231 static int ipa_power_disable(struct ipa *ipa)  in ipa_power_disable()  argument
233 	clk_disable_unprepare(ipa->power->core);  in ipa_power_disable()
235 	return ipa_interconnect_disable(ipa);  in ipa_power_disable()
240 	struct ipa *ipa = dev_get_drvdata(dev);  in ipa_runtime_suspend()  local
243 	if (ipa->setup_complete) {  in ipa_runtime_suspend()
244 		__clear_bit(IPA_POWER_FLAG_RESUMED, ipa->power->flags);  in ipa_runtime_suspend()
245 		ipa_endpoint_suspend(ipa);  in ipa_runtime_suspend()
246 		gsi_suspend(&ipa->gsi);  in ipa_runtime_suspend()
249 	return ipa_power_disable(ipa);  in ipa_runtime_suspend()
254 	struct ipa *ipa = dev_get_drvdata(dev);  in ipa_runtime_resume()  local
257 	ret = ipa_power_enable(ipa);  in ipa_runtime_resume()
262 	if (ipa->setup_complete) {  in ipa_runtime_resume()
263 		gsi_resume(&ipa->gsi);  in ipa_runtime_resume()
264 		ipa_endpoint_resume(ipa);  in ipa_runtime_resume()
272 	struct ipa *ipa = dev_get_drvdata(dev);  in ipa_suspend()  local
274 	__set_bit(IPA_POWER_FLAG_SYSTEM, ipa->power->flags);  in ipa_suspend()
281 	struct ipa *ipa = dev_get_drvdata(dev);  in ipa_resume()  local
286 	__clear_bit(IPA_POWER_FLAG_SYSTEM, ipa->power->flags);  in ipa_resume()
291 /* Return the current IPA core clock rate */
292 u32 ipa_core_clock_rate(struct ipa *ipa)  in ipa_core_clock_rate()  argument
294 	return ipa->power ? (u32)clk_get_rate(ipa->power->core) : 0;  in ipa_core_clock_rate()
298  * ipa_suspend_handler() - Handle the suspend IPA interrupt
299  * @ipa:	IPA pointer
300  * @irq_id:	IPA interrupt type (unused)
302  * If an RX endpoint is suspended, and the IPA has a packet destined for
303  * that endpoint, the IPA generates a SUSPEND interrupt to inform the AP
307 static void ipa_suspend_handler(struct ipa *ipa, enum ipa_irq_id irq_id)  in ipa_suspend_handler()  argument
309 	/* To handle an IPA interrupt we will have resumed the hardware  in ipa_suspend_handler()
313 	if (!__test_and_set_bit(IPA_POWER_FLAG_RESUMED, ipa->power->flags))  in ipa_suspend_handler()
314 		if (test_bit(IPA_POWER_FLAG_SYSTEM, ipa->power->flags))  in ipa_suspend_handler()
315 			pm_wakeup_dev_event(&ipa->pdev->dev, 0, true);  in ipa_suspend_handler()
318 	ipa_interrupt_suspend_clear_all(ipa->interrupt);  in ipa_suspend_handler()
344 void ipa_power_modem_queue_stop(struct ipa *ipa)  in ipa_power_modem_queue_stop()  argument
346 	struct ipa_power *power = ipa->power;  in ipa_power_modem_queue_stop()
352 		netif_stop_queue(ipa->modem_netdev);  in ipa_power_modem_queue_stop()
364 void ipa_power_modem_queue_wake(struct ipa *ipa)  in ipa_power_modem_queue_wake()  argument
366 	struct ipa_power *power = ipa->power;  in ipa_power_modem_queue_wake()
373 		netif_wake_queue(ipa->modem_netdev);  in ipa_power_modem_queue_wake()
380 void ipa_power_modem_queue_active(struct ipa *ipa)  in ipa_power_modem_queue_active()  argument
382 	clear_bit(IPA_POWER_FLAG_STARTED, ipa->power->flags);  in ipa_power_modem_queue_active()
385 int ipa_power_setup(struct ipa *ipa)  in ipa_power_setup()  argument
389 	ipa_interrupt_add(ipa->interrupt, IPA_IRQ_TX_SUSPEND,  in ipa_power_setup()
392 	ret = device_init_wakeup(&ipa->pdev->dev, true);  in ipa_power_setup()
394 		ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_TX_SUSPEND);  in ipa_power_setup()
399 void ipa_power_teardown(struct ipa *ipa)  in ipa_power_teardown()  argument
401 	(void)device_init_wakeup(&ipa->pdev->dev, false);  in ipa_power_teardown()
402 	ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_TX_SUSPEND);  in ipa_power_teardown()
405 /* Initialize IPA power management */