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
22 #include <linux/interrupt.h>
36  * struct ipa_interrupt - IPA interrupt information
40  * @suspend_enabled:	Bitmap of endpoints with the SUSPEND interrupt enabled
49 /* Clear the suspend interrupt for all endpoints that signaled it */
50 static void ipa_interrupt_suspend_clear_all(struct ipa_interrupt *interrupt)  in ipa_interrupt_suspend_clear_all()  argument
52 	struct ipa *ipa = interrupt->ipa;  in ipa_interrupt_suspend_clear_all()
64 		/* SUSPEND interrupt status isn't cleared on IPA version 3.0 */  in ipa_interrupt_suspend_clear_all()
73 /* Process a particular interrupt type that has been received */
74 static void ipa_interrupt_process(struct ipa_interrupt *interrupt, u32 irq_id)  in ipa_interrupt_process()  argument
76 	struct ipa *ipa = interrupt->ipa;  in ipa_interrupt_process()
87 		/* For microcontroller interrupts, clear the interrupt right  in ipa_interrupt_process()
95 		/* Clearing the SUSPEND_TX interrupt also clears the  in ipa_interrupt_process()
97 		 * caused the interrupt, so defer clearing until after  in ipa_interrupt_process()
100 		ipa_interrupt_suspend_clear_all(interrupt);  in ipa_interrupt_process()
112 	struct ipa_interrupt *interrupt = dev_id;  in ipa_isr_thread()  local
113 	struct ipa *ipa = interrupt->ipa;  in ipa_isr_thread()
114 	u32 enabled = interrupt->enabled;  in ipa_isr_thread()
127 	 * including conditions whose interrupt is not enabled.  Handle  in ipa_isr_thread()
139 			ipa_interrupt_process(interrupt, irq_id);  in ipa_isr_thread()
161 	iowrite32(ipa->interrupt->enabled, ipa->reg_virt + reg_offset(reg));  in ipa_interrupt_enabled_update()
164 /* Enable an IPA interrupt type */
167 	/* Update the IPA interrupt mask to enable it */  in ipa_interrupt_enable()
168 	ipa->interrupt->enabled |= BIT(ipa_irq);  in ipa_interrupt_enable()
172 /* Disable an IPA interrupt type */
175 	/* Update the IPA interrupt mask to disable it */  in ipa_interrupt_disable()
176 	ipa->interrupt->enabled &= ~BIT(ipa_irq);  in ipa_interrupt_disable()
182 	disable_irq(ipa->interrupt->irq);  in ipa_interrupt_irq_disable()
187 	enable_irq(ipa->interrupt->irq);  in ipa_interrupt_irq_enable()
191 static void ipa_interrupt_suspend_control(struct ipa_interrupt *interrupt,  in ipa_interrupt_suspend_control()  argument
194 	struct ipa *ipa = interrupt->ipa;  in ipa_interrupt_suspend_control()
204 	/* IPA version 3.0 does not support TX_SUSPEND interrupt control */  in ipa_interrupt_suspend_control()
208 	weight = bitmap_weight(interrupt->suspend_enabled, ipa->endpoint_count);  in ipa_interrupt_suspend_control()
220 	__change_bit(endpoint_id, interrupt->suspend_enabled);  in ipa_interrupt_suspend_control()
230 ipa_interrupt_suspend_enable(struct ipa_interrupt *interrupt, u32 endpoint_id)  in ipa_interrupt_suspend_enable()  argument
232 	ipa_interrupt_suspend_control(interrupt, endpoint_id, true);  in ipa_interrupt_suspend_enable()
237 ipa_interrupt_suspend_disable(struct ipa_interrupt *interrupt, u32 endpoint_id)  in ipa_interrupt_suspend_disable()  argument
239 	ipa_interrupt_suspend_control(interrupt, endpoint_id, false);  in ipa_interrupt_suspend_disable()
242 /* Simulate arrival of an IPA TX_SUSPEND interrupt */
243 void ipa_interrupt_simulate_suspend(struct ipa_interrupt *interrupt)  in ipa_interrupt_simulate_suspend()  argument
245 	ipa_interrupt_process(interrupt, IPA_IRQ_TX_SUSPEND);  in ipa_interrupt_simulate_suspend()
248 /* Configure the IPA interrupt framework */
251 	struct ipa_interrupt *interrupt = ipa->interrupt;  in ipa_interrupt_config()  local
252 	unsigned int irq = interrupt->irq;  in ipa_interrupt_config()
257 	interrupt->ipa = ipa;  in ipa_interrupt_config()
259 	/* Initially all IPA interrupt types are disabled */  in ipa_interrupt_config()
260 	interrupt->enabled = 0;  in ipa_interrupt_config()
261 	interrupt->suspend_enabled = bitmap_zalloc(ipa->endpoint_count,  in ipa_interrupt_config()
263 	if (!interrupt->suspend_enabled) {  in ipa_interrupt_config()
268 	/* Disable IPA interrupt types */  in ipa_interrupt_config()
273 				   "ipa", interrupt);  in ipa_interrupt_config()
292 	ipa->interrupt = interrupt;  in ipa_interrupt_config()
299 	free_irq(interrupt->irq, interrupt);  in ipa_interrupt_config()
301 	bitmap_free(interrupt->suspend_enabled);  in ipa_interrupt_config()
303 	kfree(interrupt);  in ipa_interrupt_config()
311 	struct ipa_interrupt *interrupt = ipa->interrupt;  in ipa_interrupt_deconfig()  local
314 	ipa->interrupt = NULL;  in ipa_interrupt_deconfig()
318 	free_irq(interrupt->irq, interrupt);  in ipa_interrupt_deconfig()
319 	bitmap_free(interrupt->suspend_enabled);  in ipa_interrupt_deconfig()
322 /* Initialize the IPA interrupt structure */
325 	struct ipa_interrupt *interrupt;  in ipa_interrupt_init()  local
332 	interrupt = kzalloc_obj(*interrupt);  in ipa_interrupt_init()
333 	if (!interrupt)  in ipa_interrupt_init()
335 	interrupt->irq = irq;  in ipa_interrupt_init()
337 	return interrupt;  in ipa_interrupt_init()
341 void ipa_interrupt_exit(struct ipa_interrupt *interrupt)  in ipa_interrupt_exit()  argument
343 	kfree(interrupt);  in ipa_interrupt_exit()