1 // SPDX-License-Identifier: GPL-2.0
3  * Driver for Amlogic Meson IR remote receiver
18 #include <media/rc-core.h>
20 #define DRIVER_NAME		"meson-ir"
22 /* valid on all Meson platforms */
31 /* only available on Meson 8b and newer */
39 /* Meson 6b uses REG1 to configure the mode */
43 /* Meson 8b / GXBB use REG2 to configure the mode */
73 	data = readl(ir->reg + reg);  in meson_ir_set_mask()
76 	writel(data, ir->reg + reg);  in meson_ir_set_mask()
85 	spin_lock(&ir->lock);  in meson_ir_irq()
87 	duration = readl_relaxed(ir->reg + IR_DEC_REG1);  in meson_ir_irq()
91 	status = readl_relaxed(ir->reg + IR_DEC_STATUS);  in meson_ir_irq()
94 	ir_raw_event_store_with_timeout(ir->rc, &rawir);  in meson_ir_irq()
96 	spin_unlock(&ir->lock);  in meson_ir_irq()
103 	struct device *dev = &pdev->dev;  in meson_ir_probe()
104 	struct device_node *node = dev->of_node;  in meson_ir_probe()
112 		return -ENOMEM;  in meson_ir_probe()
115 	ir->reg = devm_ioremap_resource(dev, res);  in meson_ir_probe()
116 	if (IS_ERR(ir->reg))  in meson_ir_probe()
117 		return PTR_ERR(ir->reg);  in meson_ir_probe()
123 	ir->rc = devm_rc_allocate_device(dev, RC_DRIVER_IR_RAW);  in meson_ir_probe()
124 	if (!ir->rc) {  in meson_ir_probe()
126 		return -ENOMEM;  in meson_ir_probe()
129 	ir->rc->priv = ir;  in meson_ir_probe()
130 	ir->rc->device_name = DRIVER_NAME;  in meson_ir_probe()
131 	ir->rc->input_phys = DRIVER_NAME "/input0";  in meson_ir_probe()
132 	ir->rc->input_id.bustype = BUS_HOST;  in meson_ir_probe()
133 	map_name = of_get_property(node, "linux,rc-map-name", NULL);  in meson_ir_probe()
134 	ir->rc->map_name = map_name ? map_name : RC_MAP_EMPTY;  in meson_ir_probe()
135 	ir->rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;  in meson_ir_probe()
136 	ir->rc->rx_resolution = MESON_TRATE;  in meson_ir_probe()
137 	ir->rc->min_timeout = 1;  in meson_ir_probe()
138 	ir->rc->timeout = IR_DEFAULT_TIMEOUT;  in meson_ir_probe()
139 	ir->rc->max_timeout = 10 * IR_DEFAULT_TIMEOUT;  in meson_ir_probe()
140 	ir->rc->driver_name = DRIVER_NAME;  in meson_ir_probe()
142 	spin_lock_init(&ir->lock);  in meson_ir_probe()
145 	ret = devm_rc_register_device(dev, ir->rc);  in meson_ir_probe()
157 	/* Reset the decoder */  in meson_ir_probe()
162 	if (of_device_is_compatible(node, "amlogic,meson6-ir"))  in meson_ir_probe()
170 	meson_ir_set_mask(ir, IR_DEC_REG0, REG0_RATE_MASK, MESON_TRATE - 1);  in meson_ir_probe()
188 	spin_lock_irqsave(&ir->lock, flags);  in meson_ir_remove()
190 	spin_unlock_irqrestore(&ir->lock, flags);  in meson_ir_remove()
197 	struct device *dev = &pdev->dev;  in meson_ir_shutdown()
198 	struct device_node *node = dev->of_node;  in meson_ir_shutdown()
202 	spin_lock_irqsave(&ir->lock, flags);  in meson_ir_shutdown()
208 	if (of_device_is_compatible(node, "amlogic,meson6-ir"))  in meson_ir_shutdown()
218 	spin_unlock_irqrestore(&ir->lock, flags);  in meson_ir_shutdown()
222 	{ .compatible = "amlogic,meson6-ir" },
223 	{ .compatible = "amlogic,meson8b-ir" },
224 	{ .compatible = "amlogic,meson-gxbb-ir" },
241 MODULE_DESCRIPTION("Amlogic Meson IR remote receiver driver");