9  * The IPA has an interrupt line distinct from the interrupt used by the GSI
13  * embedded in the IPA.  Each IPA interrupt type can be both masked and
23 #include <linux/interrupt.h>
35  * struct ipa_interrupt - IPA interrupt information
46 /* Process a particular interrupt type that has been received */
47 static void ipa_interrupt_process(struct ipa_interrupt *interrupt, u32 irq_id)  in ipa_interrupt_process()  argument
49 	struct ipa *ipa = interrupt->ipa;  in ipa_interrupt_process()
60 		/* For microcontroller interrupts, clear the interrupt right  in ipa_interrupt_process()
68 		/* Clearing the SUSPEND_TX interrupt also clears the  in ipa_interrupt_process()
70 		 * caused the interrupt, so defer clearing until after  in ipa_interrupt_process()
85 	struct ipa_interrupt *interrupt = dev_id;  in ipa_isr_thread()  local
86 	struct ipa *ipa = interrupt->ipa;  in ipa_isr_thread()
87 	u32 enabled = interrupt->enabled;  in ipa_isr_thread()
101 	 * including conditions whose interrupt is not enabled.  Handle  in ipa_isr_thread()
113 			ipa_interrupt_process(interrupt, irq_id);  in ipa_isr_thread()
136 	iowrite32(ipa->interrupt->enabled, ipa->reg_virt + reg_offset(reg));  in ipa_interrupt_enabled_update()
139 /* Enable an IPA interrupt type */
142 	/* Update the IPA interrupt mask to enable it */  in ipa_interrupt_enable()
143 	ipa->interrupt->enabled |= BIT(ipa_irq);  in ipa_interrupt_enable()
147 /* Disable an IPA interrupt type */
150 	/* Update the IPA interrupt mask to disable it */  in ipa_interrupt_disable()
151 	ipa->interrupt->enabled &= ~BIT(ipa_irq);  in ipa_interrupt_disable()
157 	disable_irq(ipa->interrupt->irq);  in ipa_interrupt_irq_disable()
162 	enable_irq(ipa->interrupt->irq);  in ipa_interrupt_irq_enable()
166 static void ipa_interrupt_suspend_control(struct ipa_interrupt *interrupt,  in ipa_interrupt_suspend_control()  argument
169 	struct ipa *ipa = interrupt->ipa;  in ipa_interrupt_suspend_control()
178 	/* IPA version 3.0 does not support TX_SUSPEND interrupt control */  in ipa_interrupt_suspend_control()
196 ipa_interrupt_suspend_enable(struct ipa_interrupt *interrupt, u32 endpoint_id)  in ipa_interrupt_suspend_enable()  argument
198 	ipa_interrupt_suspend_control(interrupt, endpoint_id, true);  in ipa_interrupt_suspend_enable()
203 ipa_interrupt_suspend_disable(struct ipa_interrupt *interrupt, u32 endpoint_id)  in ipa_interrupt_suspend_disable()  argument
205 	ipa_interrupt_suspend_control(interrupt, endpoint_id, false);  in ipa_interrupt_suspend_disable()
208 /* Clear the suspend interrupt for all endpoints that signaled it */
209 void ipa_interrupt_suspend_clear_all(struct ipa_interrupt *interrupt)  in ipa_interrupt_suspend_clear_all()  argument
211 	struct ipa *ipa = interrupt->ipa;  in ipa_interrupt_suspend_clear_all()
223 		/* SUSPEND interrupt status isn't cleared on IPA version 3.0 */  in ipa_interrupt_suspend_clear_all()
232 /* Simulate arrival of an IPA TX_SUSPEND interrupt */
233 void ipa_interrupt_simulate_suspend(struct ipa_interrupt *interrupt)  in ipa_interrupt_simulate_suspend()  argument
235 	ipa_interrupt_process(interrupt, IPA_IRQ_TX_SUSPEND);  in ipa_interrupt_simulate_suspend()
238 /* Configure the IPA interrupt framework */
242 	struct ipa_interrupt *interrupt;  in ipa_interrupt_config()  local
255 	interrupt = kzalloc(sizeof(*interrupt), GFP_KERNEL);  in ipa_interrupt_config()
256 	if (!interrupt)  in ipa_interrupt_config()
258 	interrupt->ipa = ipa;  in ipa_interrupt_config()
259 	interrupt->irq = irq;  in ipa_interrupt_config()
266 				   "ipa", interrupt);  in ipa_interrupt_config()
278 	return interrupt;  in ipa_interrupt_config()
281 	free_irq(interrupt->irq, interrupt);  in ipa_interrupt_config()
283 	kfree(interrupt);  in ipa_interrupt_config()
289 void ipa_interrupt_deconfig(struct ipa_interrupt *interrupt)  in ipa_interrupt_deconfig()  argument
291 	struct device *dev = &interrupt->ipa->pdev->dev;  in ipa_interrupt_deconfig()
294 	free_irq(interrupt->irq, interrupt);  in ipa_interrupt_deconfig()
295 	kfree(interrupt);  in ipa_interrupt_deconfig()