3  * Driver for Allwinner sunXi IR controller
8  * Based on sun5i-ir.c:
20 #define SUNXI_IR_DEV "sunxi-ir"
23 /* IR Control */
61 #define REG_RXSTA_GET_AC(val) (((val) >> 8) & (ir->fifo_size * 2 - 1))
65 /* IR Sample Config */
109 	struct sunxi_ir *ir = dev_id;  in sunxi_ir_irq()  local
112 	spin_lock(&ir->ir_lock);  in sunxi_ir_irq()
114 	status = readl(ir->base + SUNXI_IR_RXSTA_REG);  in sunxi_ir_irq()
117 	writel(status | REG_RXSTA_CLEARALL, ir->base + SUNXI_IR_RXSTA_REG);  in sunxi_ir_irq()
123 		rc = rc > ir->fifo_size ? ir->fifo_size : rc;  in sunxi_ir_irq()
127 			dt = readb(ir->base + SUNXI_IR_RXFIFO_REG);  in sunxi_ir_irq()
130 					 ir->rc->rx_resolution;  in sunxi_ir_irq()
131 			ir_raw_event_store_with_filter(ir->rc, &rawir);  in sunxi_ir_irq()
136 		ir_raw_event_reset(ir->rc);  in sunxi_ir_irq()
138 		ir_raw_event_set_idle(ir->rc, true);  in sunxi_ir_irq()
139 		ir_raw_event_handle(ir->rc);  in sunxi_ir_irq()
142 	spin_unlock(&ir->ir_lock);  in sunxi_ir_irq()
156 	struct sunxi_ir *ir;  in sunxi_ir_probe()  local
159 	ir = devm_kzalloc(dev, sizeof(struct sunxi_ir), GFP_KERNEL);  in sunxi_ir_probe()
160 	if (!ir)  in sunxi_ir_probe()
169 	spin_lock_init(&ir->ir_lock);  in sunxi_ir_probe()
171 	ir->fifo_size = quirks->fifo_size;  in sunxi_ir_probe()
174 	ir->apb_clk = devm_clk_get(dev, "apb");  in sunxi_ir_probe()
175 	if (IS_ERR(ir->apb_clk)) {  in sunxi_ir_probe()
177 		return PTR_ERR(ir->apb_clk);  in sunxi_ir_probe()
179 	ir->clk = devm_clk_get(dev, "ir");  in sunxi_ir_probe()
180 	if (IS_ERR(ir->clk)) {  in sunxi_ir_probe()
181 		dev_err(dev, "failed to get a ir clock.\n");  in sunxi_ir_probe()
182 		return PTR_ERR(ir->clk);  in sunxi_ir_probe()
190 		ir->rst = devm_reset_control_get_exclusive(dev, NULL);  in sunxi_ir_probe()
191 		if (IS_ERR(ir->rst))  in sunxi_ir_probe()
192 			return PTR_ERR(ir->rst);  in sunxi_ir_probe()
193 		ret = reset_control_deassert(ir->rst);  in sunxi_ir_probe()
198 	ret = clk_set_rate(ir->clk, b_clk_freq);  in sunxi_ir_probe()
200 		dev_err(dev, "set ir base clock failed!\n");  in sunxi_ir_probe()
205 	if (clk_prepare_enable(ir->apb_clk)) {  in sunxi_ir_probe()
211 	if (clk_prepare_enable(ir->clk)) {  in sunxi_ir_probe()
219 	ir->base = devm_ioremap_resource(dev, res);  in sunxi_ir_probe()
220 	if (IS_ERR(ir->base)) {  in sunxi_ir_probe()
221 		ret = PTR_ERR(ir->base);  in sunxi_ir_probe()
225 	ir->rc = rc_allocate_device(RC_DRIVER_IR_RAW);  in sunxi_ir_probe()
226 	if (!ir->rc) {  in sunxi_ir_probe()
232 	ir->rc->priv = ir;  in sunxi_ir_probe()
233 	ir->rc->device_name = SUNXI_IR_DEV;  in sunxi_ir_probe()
234 	ir->rc->input_phys = "sunxi-ir/input0";  in sunxi_ir_probe()
235 	ir->rc->input_id.bustype = BUS_HOST;  in sunxi_ir_probe()
236 	ir->rc->input_id.vendor = 0x0001;  in sunxi_ir_probe()
237 	ir->rc->input_id.product = 0x0001;  in sunxi_ir_probe()
238 	ir->rc->input_id.version = 0x0100;  in sunxi_ir_probe()
239 	ir->map_name = of_get_property(dn, "linux,rc-map-name", NULL);  in sunxi_ir_probe()
240 	ir->rc->map_name = ir->map_name ?: RC_MAP_EMPTY;  in sunxi_ir_probe()
241 	ir->rc->dev.parent = dev;  in sunxi_ir_probe()
242 	ir->rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;  in sunxi_ir_probe()
243 	/* Frequency after IR internal divider with sample period in ns */  in sunxi_ir_probe()
244 	ir->rc->rx_resolution = (USEC_PER_SEC / (b_clk_freq / 64));  in sunxi_ir_probe()
245 	ir->rc->timeout = MS_TO_US(SUNXI_IR_TIMEOUT);  in sunxi_ir_probe()
246 	ir->rc->driver_name = SUNXI_IR_DEV;  in sunxi_ir_probe()
248 	ret = rc_register_device(ir->rc);  in sunxi_ir_probe()
254 	platform_set_drvdata(pdev, ir);  in sunxi_ir_probe()
257 	ir->irq = platform_get_irq(pdev, 0);  in sunxi_ir_probe()
258 	if (ir->irq < 0) {  in sunxi_ir_probe()
259 		ret = ir->irq;  in sunxi_ir_probe()
263 	ret = devm_request_irq(dev, ir->irq, sunxi_ir_irq, 0, SUNXI_IR_DEV, ir);  in sunxi_ir_probe()
270 	writel(REG_CTL_MD, ir->base+SUNXI_IR_CTL_REG);  in sunxi_ir_probe()
274 	       ir->base + SUNXI_IR_CIR_REG);  in sunxi_ir_probe()
277 	writel(REG_RXCTL_RPPI, ir->base + SUNXI_IR_RXCTL_REG);  in sunxi_ir_probe()
280 	writel(REG_RXSTA_CLEARALL, ir->base + SUNXI_IR_RXSTA_REG);  in sunxi_ir_probe()
287 	       REG_RXINT_RAI_EN | REG_RXINT_RAL(ir->fifo_size / 2 - 1),  in sunxi_ir_probe()
288 	       ir->base + SUNXI_IR_RXINT_REG);  in sunxi_ir_probe()
290 	/* Enable IR Module */  in sunxi_ir_probe()
291 	tmp = readl(ir->base + SUNXI_IR_CTL_REG);  in sunxi_ir_probe()
292 	writel(tmp | REG_CTL_GEN | REG_CTL_RXEN, ir->base + SUNXI_IR_CTL_REG);  in sunxi_ir_probe()
294 	dev_info(dev, "initialized sunXi IR driver\n");  in sunxi_ir_probe()
298 	rc_free_device(ir->rc);  in sunxi_ir_probe()
300 	clk_disable_unprepare(ir->clk);  in sunxi_ir_probe()
302 	clk_disable_unprepare(ir->apb_clk);  in sunxi_ir_probe()
304 	reset_control_assert(ir->rst);  in sunxi_ir_probe()
312 	struct sunxi_ir *ir = platform_get_drvdata(pdev);  in sunxi_ir_remove()  local
314 	clk_disable_unprepare(ir->clk);  in sunxi_ir_remove()
315 	clk_disable_unprepare(ir->apb_clk);  in sunxi_ir_remove()
316 	reset_control_assert(ir->rst);  in sunxi_ir_remove()
318 	spin_lock_irqsave(&ir->ir_lock, flags);  in sunxi_ir_remove()
319 	/* disable IR IRQ */  in sunxi_ir_remove()
320 	writel(0, ir->base + SUNXI_IR_RXINT_REG);  in sunxi_ir_remove()
322 	writel(REG_RXSTA_CLEARALL, ir->base + SUNXI_IR_RXSTA_REG);  in sunxi_ir_remove()
323 	/* disable IR */  in sunxi_ir_remove()
324 	writel(0, ir->base + SUNXI_IR_CTL_REG);  in sunxi_ir_remove()
325 	spin_unlock_irqrestore(&ir->ir_lock, flags);  in sunxi_ir_remove()
327 	rc_unregister_device(ir->rc);  in sunxi_ir_remove()
348 		.compatible = "allwinner,sun4i-a10-ir",
352 		.compatible = "allwinner,sun5i-a13-ir",
356 		.compatible = "allwinner,sun6i-a31-ir",
374 MODULE_DESCRIPTION("Allwinner sunXi IR controller driver");