1 // SPDX-License-Identifier: GPL-2.0
3  * Driver for Amlogic Meson IR remote receiver
19 #include <media/rc-core.h>
21 #define DRIVER_NAME		"meson-ir"
67 	struct meson_ir *ir = dev_id;  in meson_ir_irq()  local
71 	spin_lock(&ir->lock);  in meson_ir_irq()
73 	regmap_read(ir->reg, IR_DEC_REG1, &duration);  in meson_ir_irq()
77 	regmap_read(ir->reg, IR_DEC_STATUS, &status);  in meson_ir_irq()
80 	ir_raw_event_store_with_timeout(ir->rc, &rawir);  in meson_ir_irq()
82 	spin_unlock(&ir->lock);  in meson_ir_irq()
89 	struct device *dev = &pdev->dev;  in meson_ir_probe()
90 	struct device_node *node = dev->of_node;  in meson_ir_probe()
93 	struct meson_ir *ir;  in meson_ir_probe()  local
96 	ir = devm_kzalloc(dev, sizeof(struct meson_ir), GFP_KERNEL);  in meson_ir_probe()
97 	if (!ir)  in meson_ir_probe()
98 		return -ENOMEM;  in meson_ir_probe()
104 	ir->reg = devm_regmap_init_mmio(&pdev->dev, res_start,  in meson_ir_probe()
106 	if (IS_ERR(ir->reg))  in meson_ir_probe()
107 		return PTR_ERR(ir->reg);  in meson_ir_probe()
113 	ir->rc = devm_rc_allocate_device(dev, RC_DRIVER_IR_RAW);  in meson_ir_probe()
114 	if (!ir->rc) {  in meson_ir_probe()
116 		return -ENOMEM;  in meson_ir_probe()
119 	ir->rc->priv = ir;  in meson_ir_probe()
120 	ir->rc->device_name = DRIVER_NAME;  in meson_ir_probe()
121 	ir->rc->input_phys = DRIVER_NAME "/input0";  in meson_ir_probe()
122 	ir->rc->input_id.bustype = BUS_HOST;  in meson_ir_probe()
123 	map_name = of_get_property(node, "linux,rc-map-name", NULL);  in meson_ir_probe()
124 	ir->rc->map_name = map_name ? map_name : RC_MAP_EMPTY;  in meson_ir_probe()
125 	ir->rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;  in meson_ir_probe()
126 	ir->rc->rx_resolution = MESON_RAW_TRATE;  in meson_ir_probe()
127 	ir->rc->min_timeout = 1;  in meson_ir_probe()
128 	ir->rc->timeout = IR_DEFAULT_TIMEOUT;  in meson_ir_probe()
129 	ir->rc->max_timeout = 10 * IR_DEFAULT_TIMEOUT;  in meson_ir_probe()
130 	ir->rc->driver_name = DRIVER_NAME;  in meson_ir_probe()
132 	spin_lock_init(&ir->lock);  in meson_ir_probe()
133 	platform_set_drvdata(pdev, ir);  in meson_ir_probe()
135 	ret = devm_rc_register_device(dev, ir->rc);  in meson_ir_probe()
141 	ret = devm_request_irq(dev, irq, meson_ir_irq, 0, NULL, ir);  in meson_ir_probe()
148 	regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET,  in meson_ir_probe()
150 	regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET, 0);  in meson_ir_probe()
153 	if (of_device_is_compatible(node, "amlogic,meson6-ir"))  in meson_ir_probe()
154 		regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_MODE,  in meson_ir_probe()
157 		regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_MODE,  in meson_ir_probe()
161 	regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_BASE_TIME,  in meson_ir_probe()
163 				      MESON_RAW_TRATE - 1));  in meson_ir_probe()
165 	regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_IRQSEL,  in meson_ir_probe()
168 	regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE,  in meson_ir_probe()
171 	dev_info(dev, "receiver initialized\n");  in meson_ir_probe()
178 	struct meson_ir *ir = platform_get_drvdata(pdev);  in meson_ir_remove()  local
182 	spin_lock_irqsave(&ir->lock, flags);  in meson_ir_remove()
183 	regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE, 0);  in meson_ir_remove()
184 	spin_unlock_irqrestore(&ir->lock, flags);  in meson_ir_remove()
189 	struct device *dev = &pdev->dev;  in meson_ir_shutdown()
190 	struct device_node *node = dev->of_node;  in meson_ir_shutdown()
191 	struct meson_ir *ir = platform_get_drvdata(pdev);  in meson_ir_shutdown()  local
194 	spin_lock_irqsave(&ir->lock, flags);  in meson_ir_shutdown()
200 	if (of_device_is_compatible(node, "amlogic,meson6-ir"))  in meson_ir_shutdown()
201 		regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_MODE,  in meson_ir_shutdown()
204 		regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_MODE,  in meson_ir_shutdown()
208 	regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_BASE_TIME,  in meson_ir_shutdown()
210 				      MESON_HW_TRATE - 1));  in meson_ir_shutdown()
212 	spin_unlock_irqrestore(&ir->lock, flags);  in meson_ir_shutdown()
216 	{ .compatible = "amlogic,meson6-ir" },
217 	{ .compatible = "amlogic,meson8b-ir" },
218 	{ .compatible = "amlogic,meson-gxbb-ir" },
235 MODULE_DESCRIPTION("Amlogic Meson IR remote receiver driver");