1 // SPDX-License-Identifier: GPL-2.0-only
15 #include <linux/dma/ipu-dma.h>
20  * Register read / write - shall be inlined by the compiler
24 	return __raw_readl(ipu->reg_ipu + reg);  in ipu_read_reg()
29 	__raw_writel(value, ipu->reg_ipu + reg);  in ipu_write_reg()
72 	struct ipu_irq_bank	*bank;  member
96 	struct ipu_irq_bank *bank;  in ipu_irq_unmask()  local
102 	bank = map->bank;  in ipu_irq_unmask()
103 	if (!bank) {  in ipu_irq_unmask()
105 		pr_err("IPU: %s(%u) - unmapped!\n", __func__, d->irq);  in ipu_irq_unmask()
109 	reg = ipu_read_reg(bank->ipu, bank->control);  in ipu_irq_unmask()
110 	reg |= (1UL << (map->source & 31));  in ipu_irq_unmask()
111 	ipu_write_reg(bank->ipu, reg, bank->control);  in ipu_irq_unmask()
119 	struct ipu_irq_bank *bank;  in ipu_irq_mask()  local
125 	bank = map->bank;  in ipu_irq_mask()
126 	if (!bank) {  in ipu_irq_mask()
128 		pr_err("IPU: %s(%u) - unmapped!\n", __func__, d->irq);  in ipu_irq_mask()
132 	reg = ipu_read_reg(bank->ipu, bank->control);  in ipu_irq_mask()
133 	reg &= ~(1UL << (map->source & 31));  in ipu_irq_mask()
134 	ipu_write_reg(bank->ipu, reg, bank->control);  in ipu_irq_mask()
142 	struct ipu_irq_bank *bank;  in ipu_irq_ack()  local
147 	bank = map->bank;  in ipu_irq_ack()
148 	if (!bank) {  in ipu_irq_ack()
150 		pr_err("IPU: %s(%u) - unmapped!\n", __func__, d->irq);  in ipu_irq_ack()
154 	ipu_write_reg(bank->ipu, 1UL << (map->source & 31), bank->status);  in ipu_irq_ack()
159  * ipu_irq_status() - returns the current interrupt status of the specified IRQ.
167 	struct ipu_irq_bank *bank;  in ipu_irq_status()  local
172 	bank = map->bank;  in ipu_irq_status()
173 	ret = bank && ipu_read_reg(bank->ipu, bank->status) &  in ipu_irq_status()
174 		(1UL << (map->source & 31));  in ipu_irq_status()
181  * ipu_irq_map() - map an IPU interrupt source to an IRQ number
183  * @return:	mapped IRQ number or negative error code
186  * sources, they are broken down in 5 32-bit registers, like 32, 32, 24, 32, 17.
187  * However, the source argument of this function is not the sequence number of
189  * register has source number 96, and not 88. This makes calculations easier,
195 	int i, ret = -ENOMEM;  in ipu_irq_map()
203 		pr_err("IPU: Source %u already mapped to IRQ %u\n", source, map->irq);  in ipu_irq_map()
204 		ret = -EBUSY;  in ipu_irq_map()
214 			irq_map[i].bank = irq_bank + source / 32;  in ipu_irq_map()
233  * ipu_irq_map() - map an IPU interrupt source to an IRQ number
239 	int i, ret = -EINVAL;  in ipu_irq_unmap()
252 			irq_map[i].source = -EINVAL;  in ipu_irq_unmap()
253 			irq_map[i].bank = NULL;  in ipu_irq_unmap()
273 		struct ipu_irq_bank *bank = irq_bank + i;  in ipu_irq_handler()  local
276 		status = ipu_read_reg(ipu, bank->status);  in ipu_irq_handler()
279 		 * be acked by ->handle_irq() (handle_level_irq). However, we  in ipu_irq_handler()
282 		status &= ipu_read_reg(ipu, bank->control);  in ipu_irq_handler()
288 			line--;  in ipu_irq_handler()
295 				pr_err("IPU: Interrupt on unmapped source %u bank %d\n",  in ipu_irq_handler()
299 			irq = map->irq;  in ipu_irq_handler()
317 	int irq_base = irq_alloc_descs(-1, 0, CONFIG_MX3_IPU_IRQS,  in ipu_irq_attach_irq()
338 		irq_map[i].source = -EINVAL;  in ipu_irq_attach_irq()
343 	irq_set_chained_handler_and_data(ipu->irq_fn, ipu_irq_handler, ipu);  in ipu_irq_attach_irq()
345 	irq_set_chained_handler_and_data(ipu->irq_err, ipu_irq_handler, ipu);  in ipu_irq_attach_irq()
347 	ipu->irq_base = irq_base;  in ipu_irq_attach_irq()
356 	irq_base = ipu->irq_base;  in ipu_irq_detach_irq()
358 	irq_set_chained_handler_and_data(ipu->irq_fn, NULL, NULL);  in ipu_irq_detach_irq()
360 	irq_set_chained_handler_and_data(ipu->irq_err, NULL, NULL);  in ipu_irq_detach_irq()