1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
6  * Driver for interrupt combiners in the Top-level Control and Status
7  * Registers (TCSR) hardware block in Qualcomm Technologies chips.
10  * signal routed to a parent interrupt controller, and provides read-
11  * only, 32-bit registers to query the status of individual interrupts.
39 static inline int irq_nr(u32 reg, u32 bit)  in irq_nr()  argument
41 	return reg * REG_SIZE + bit;  in irq_nr()
51 	u32 reg;  in combiner_handle_irq()  local
55 	for (reg = 0; reg < combiner->nregs; reg++) {  in combiner_handle_irq()
60 		bit = readl_relaxed(combiner->regs[reg].addr);  in combiner_handle_irq()
61 		status = bit & combiner->regs[reg].enabled;  in combiner_handle_irq()
65 					    combiner->regs[reg].enabled,  in combiner_handle_irq()
66 					    combiner->regs[reg].addr);  in combiner_handle_irq()
71 			hwirq = irq_nr(reg, bit);  in combiner_handle_irq()
72 			generic_handle_domain_irq(combiner->domain, hwirq);  in combiner_handle_irq()
82 	struct combiner_reg *reg = combiner->regs + data->hwirq / REG_SIZE;  in combiner_irq_chip_mask_irq()  local
84 	clear_bit(data->hwirq % REG_SIZE, &reg->enabled);  in combiner_irq_chip_mask_irq()
90 	struct combiner_reg *reg = combiner->regs + data->hwirq / REG_SIZE;  in combiner_irq_chip_unmask_irq()  local
92 	set_bit(data->hwirq % REG_SIZE, &reg->enabled);  in combiner_irq_chip_unmask_irq()
98 	.name = "qcom-irq-combiner"
105 	irq_set_chip_data(irq, domain->host_data);  in combiner_irq_map()
118 	struct combiner *combiner = d->host_data;  in combiner_irq_translate()
120 	if (is_acpi_node(fws->fwnode)) {  in combiner_irq_translate()
121 		if (WARN_ON((fws->param_count != 2) ||  in combiner_irq_translate()
122 			    (fws->param[0] >= combiner->nirqs) ||  in combiner_irq_translate()
123 			    (fws->param[1] & IORESOURCE_IRQ_LOWEDGE) ||  in combiner_irq_translate()
124 			    (fws->param[1] & IORESOURCE_IRQ_HIGHEDGE)))  in combiner_irq_translate()
125 			return -EINVAL;  in combiner_irq_translate()
127 		*hwirq = fws->param[0];  in combiner_irq_translate()
128 		*type = fws->param[1];  in combiner_irq_translate()
132 	return -EINVAL;  in combiner_irq_translate()
145 	if (ares->type == ACPI_RESOURCE_TYPE_GENERIC_REGISTER)  in count_registers_cb()
152 	acpi_handle ahandle = ACPI_HANDLE(&pdev->dev);  in count_registers()
157 		return -EINVAL;  in count_registers()
162 		return -EINVAL;  in count_registers()
175 	struct acpi_resource_generic_register *reg;  in get_registers_cb()  local
179 	if (ares->type != ACPI_RESOURCE_TYPE_GENERIC_REGISTER)  in get_registers_cb()
182 	reg = &ares->data.generic_reg;  in get_registers_cb()
183 	paddr = reg->address;  in get_registers_cb()
184 	if ((reg->space_id != ACPI_SPACE_MEM) ||  in get_registers_cb()
185 	    (reg->bit_offset != 0) ||  in get_registers_cb()
186 	    (reg->bit_width > REG_SIZE)) {  in get_registers_cb()
187 		dev_err(ctx->dev, "Bad register resource @%pa\n", &paddr);  in get_registers_cb()
188 		ctx->err = -EINVAL;  in get_registers_cb()
192 	vaddr = devm_ioremap(ctx->dev, reg->address, REG_SIZE);  in get_registers_cb()
194 		dev_err(ctx->dev, "Can't map register @%pa\n", &paddr);  in get_registers_cb()
195 		ctx->err = -ENOMEM;  in get_registers_cb()
199 	ctx->combiner->regs[ctx->combiner->nregs].addr = vaddr;  in get_registers_cb()
200 	ctx->combiner->nirqs += reg->bit_width;  in get_registers_cb()
201 	ctx->combiner->nregs++;  in get_registers_cb()
207 	acpi_handle ahandle = ACPI_HANDLE(&pdev->dev);  in get_registers()
212 		return -EINVAL;  in get_registers()
214 	ctx.dev = &pdev->dev;  in get_registers()
233 		dev_err(&pdev->dev, "Error reading register resources\n");  in combiner_probe()
234 		return -EINVAL;  in combiner_probe()
237 	combiner = devm_kzalloc(&pdev->dev, struct_size(combiner, regs, nregs),  in combiner_probe()
240 		return -ENOMEM;  in combiner_probe()
246 	combiner->parent_irq = platform_get_irq(pdev, 0);  in combiner_probe()
247 	if (combiner->parent_irq <= 0)  in combiner_probe()
248 		return -EPROBE_DEFER;  in combiner_probe()
250 	combiner->domain = irq_domain_create_linear(pdev->dev.fwnode, combiner->nirqs,  in combiner_probe()
252 	if (!combiner->domain)  in combiner_probe()
254 		return -ENODEV;  in combiner_probe()
256 	irq_set_chained_handler_and_data(combiner->parent_irq,  in combiner_probe()
259 	dev_info(&pdev->dev, "Initialized with [p=%d,n=%d,r=%p]\n",  in combiner_probe()
260 		 combiner->parent_irq, combiner->nirqs, combiner->regs[0].addr);  in combiner_probe()
271 		.name = "qcom-irq-combiner",