1 // SPDX-License-Identifier: GPL-2.0
3 /* Copyright (c) 2014-2018, The Linux Foundation. All rights reserved.
4  * Copyright (C) 2018-2024 Linaro Ltd.
36  * struct ipa_interrupt - IPA interrupt information
52 	struct ipa *ipa = interrupt->ipa;  in ipa_interrupt_suspend_clear_all()
56 	unit_count = DIV_ROUND_UP(ipa->endpoint_count, 32);  in ipa_interrupt_suspend_clear_all()
62 		val = ioread32(ipa->reg_virt + reg_n_offset(reg, unit));  in ipa_interrupt_suspend_clear_all()
65 		if (!val || ipa->version == IPA_VERSION_3_0)  in ipa_interrupt_suspend_clear_all()
69 		iowrite32(val, ipa->reg_virt + reg_n_offset(reg, unit));  in ipa_interrupt_suspend_clear_all()
76 	struct ipa *ipa = interrupt->ipa;  in ipa_interrupt_process()
79 	u32 offset;  in ipa_interrupt_process()  local
82 	offset = reg_offset(reg);  in ipa_interrupt_process()
90 		iowrite32(mask, ipa->reg_virt + offset);  in ipa_interrupt_process()
104 		iowrite32(mask, ipa->reg_virt + offset);  in ipa_interrupt_process()
113 	struct ipa *ipa = interrupt->ipa;  in ipa_isr_thread()
114 	u32 enabled = interrupt->enabled;  in ipa_isr_thread()
115 	struct device *dev = ipa->dev;  in ipa_isr_thread()
118 	u32 offset;  in ipa_isr_thread()  local
131 	offset = reg_offset(reg);  in ipa_isr_thread()
132 	pending = ioread32(ipa->reg_virt + offset);  in ipa_isr_thread()
141 		pending = ioread32(ipa->reg_virt + offset);  in ipa_isr_thread()
149 		iowrite32(pending, ipa->reg_virt + reg_offset(reg));  in ipa_isr_thread()
162 	iowrite32(ipa->interrupt->enabled, ipa->reg_virt + reg_offset(reg));  in ipa_interrupt_enabled_update()
165 /* Enable an IPA interrupt type */
168 	/* Update the IPA interrupt mask to enable it */  in ipa_interrupt_enable()
169 	ipa->interrupt->enabled |= BIT(ipa_irq);  in ipa_interrupt_enable()
177 	ipa->interrupt->enabled &= ~BIT(ipa_irq);  in ipa_interrupt_disable()
183 	disable_irq(ipa->interrupt->irq);  in ipa_interrupt_irq_disable()
188 	enable_irq(ipa->interrupt->irq);  in ipa_interrupt_irq_enable()
191 /* Common function used to enable/disable TX_SUSPEND for an endpoint */
193 					  u32 endpoint_id, bool enable)  in ipa_interrupt_suspend_control()  argument
195 	struct ipa *ipa = interrupt->ipa;  in ipa_interrupt_suspend_control()
200 	u32 offset;  in ipa_interrupt_suspend_control()  local
203 	WARN_ON(!test_bit(endpoint_id, ipa->available));  in ipa_interrupt_suspend_control()
206 	if (ipa->version == IPA_VERSION_3_0)  in ipa_interrupt_suspend_control()
209 	weight = bitmap_weight(interrupt->suspend_enabled, ipa->endpoint_count);  in ipa_interrupt_suspend_control()
210 	if (weight == 1 && !enable)  in ipa_interrupt_suspend_control()
214 	offset = reg_n_offset(reg, unit);  in ipa_interrupt_suspend_control()
215 	val = ioread32(ipa->reg_virt + offset);  in ipa_interrupt_suspend_control()
217 	if (enable)  in ipa_interrupt_suspend_control()
221 	__change_bit(endpoint_id, interrupt->suspend_enabled);  in ipa_interrupt_suspend_control()
223 	iowrite32(val, ipa->reg_virt + offset);  in ipa_interrupt_suspend_control()
225 	if (!weight && enable)  in ipa_interrupt_suspend_control()
229 /* Enable TX_SUSPEND for an endpoint */
252 	struct ipa_interrupt *interrupt = ipa->interrupt;  in ipa_interrupt_config()
253 	unsigned int irq = interrupt->irq;  in ipa_interrupt_config()
254 	struct device *dev = ipa->dev;  in ipa_interrupt_config()
258 	interrupt->ipa = ipa;  in ipa_interrupt_config()
261 	interrupt->enabled = 0;  in ipa_interrupt_config()
262 	interrupt->suspend_enabled = bitmap_zalloc(ipa->endpoint_count,  in ipa_interrupt_config()
264 	if (!interrupt->suspend_enabled) {  in ipa_interrupt_config()
265 		ret = -ENOMEM;  in ipa_interrupt_config()
271 	iowrite32(0, ipa->reg_virt + reg_offset(reg));  in ipa_interrupt_config()
293 	ipa->interrupt = interrupt;  in ipa_interrupt_config()
300 	free_irq(interrupt->irq, interrupt);  in ipa_interrupt_config()
302 	bitmap_free(interrupt->suspend_enabled);  in ipa_interrupt_config()
312 	struct ipa_interrupt *interrupt = ipa->interrupt;  in ipa_interrupt_deconfig()
313 	struct device *dev = ipa->dev;  in ipa_interrupt_deconfig()
315 	ipa->interrupt = NULL;  in ipa_interrupt_deconfig()
319 	free_irq(interrupt->irq, interrupt);  in ipa_interrupt_deconfig()
320 	bitmap_free(interrupt->suspend_enabled);  in ipa_interrupt_deconfig()
331 		return ERR_PTR(irq ? : -EINVAL);  in ipa_interrupt_init()
335 		return ERR_PTR(-ENOMEM);  in ipa_interrupt_init()
336 	interrupt->irq = irq;  in ipa_interrupt_init()