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path: root/drivers/media/rc/meson-ir.c
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Diffstat (limited to 'drivers/media/rc/meson-ir.c')
-rw-r--r--drivers/media/rc/meson-ir.c644
1 files changed, 644 insertions, 0 deletions
diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c
new file mode 100644
index 000000000000..272ebb0d97c8
--- /dev/null
+++ b/drivers/media/rc/meson-ir.c
@@ -0,0 +1,644 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for Amlogic Meson IR remote receiver
+ *
+ * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/bitfield.h>
+#include <linux/regmap.h>
+
+#include <media/rc-core.h>
+
+#define DRIVER_NAME "meson-ir"
+
+#define IR_DEC_LDR_ACTIVE 0x00
+#define IR_DEC_LDR_ACTIVE_MAX GENMASK(28, 16)
+#define IR_DEC_LDR_ACTIVE_MIN GENMASK(12, 0)
+#define IR_DEC_LDR_IDLE 0x04
+#define IR_DEC_LDR_IDLE_MAX GENMASK(28, 16)
+#define IR_DEC_LDR_IDLE_MIN GENMASK(12, 0)
+#define IR_DEC_LDR_REPEAT 0x08
+#define IR_DEC_LDR_REPEAT_MAX GENMASK(25, 16)
+#define IR_DEC_LDR_REPEAT_MIN GENMASK(9, 0)
+#define IR_DEC_BIT_0 0x0c
+#define IR_DEC_BIT_0_MAX GENMASK(25, 16)
+#define IR_DEC_BIT_0_MIN GENMASK(9, 0)
+#define IR_DEC_REG0 0x10
+#define IR_DEC_REG0_FILTER GENMASK(30, 28)
+#define IR_DEC_REG0_FRAME_TIME_MAX GENMASK(24, 12)
+#define IR_DEC_REG0_BASE_TIME GENMASK(11, 0)
+#define IR_DEC_FRAME 0x14
+#define IR_DEC_STATUS 0x18
+#define IR_DEC_STATUS_BIT_1_ENABLE BIT(30)
+#define IR_DEC_STATUS_BIT_1_MAX GENMASK(29, 20)
+#define IR_DEC_STATUS_BIT_1_MIN GENMASK(19, 10)
+#define IR_DEC_STATUS_PULSE BIT(8)
+#define IR_DEC_STATUS_BUSY BIT(7)
+#define IR_DEC_STATUS_FRAME_STATUS GENMASK(3, 0)
+#define IR_DEC_REG1 0x1c
+#define IR_DEC_REG1_TIME_IV GENMASK(28, 16)
+#define IR_DEC_REG1_FRAME_LEN GENMASK(13, 8)
+#define IR_DEC_REG1_ENABLE BIT(15)
+#define IR_DEC_REG1_HOLD_CODE BIT(6)
+#define IR_DEC_REG1_IRQSEL GENMASK(3, 2)
+#define IR_DEC_REG1_RESET BIT(0)
+/* Meson 6b uses REG1 to configure IR mode */
+#define IR_DEC_REG1_MODE GENMASK(8, 7)
+
+/* The following registers are only available on Meson 8b and newer */
+#define IR_DEC_REG2 0x20
+#define IR_DEC_REG2_TICK_MODE BIT(15)
+#define IR_DEC_REG2_REPEAT_COUNTER BIT(13)
+#define IR_DEC_REG2_REPEAT_TIME BIT(12)
+#define IR_DEC_REG2_COMPARE_FRAME BIT(11)
+#define IR_DEC_REG2_BIT_ORDER BIT(8)
+/* Meson 8b / GXBB use REG2 to configure IR mode */
+#define IR_DEC_REG2_MODE GENMASK(3, 0)
+#define IR_DEC_DURATN2 0x24
+#define IR_DEC_DURATN2_MAX GENMASK(25, 16)
+#define IR_DEC_DURATN2_MIN GENMASK(9, 0)
+#define IR_DEC_DURATN3 0x28
+#define IR_DEC_DURATN3_MAX GENMASK(25, 16)
+#define IR_DEC_DURATN3_MIN GENMASK(9, 0)
+#define IR_DEC_FRAME1 0x2c
+
+#define FRAME_MSB_FIRST true
+#define FRAME_LSB_FIRST false
+
+#define DEC_MODE_NEC 0x0
+#define DEC_MODE_RAW 0x2
+#define DEC_MODE_RC6 0x9
+#define DEC_MODE_XMP 0xE
+#define DEC_MODE_UNKNOW 0xFF
+
+#define DEC_STATUS_VALID BIT(3)
+#define DEC_STATUS_DATA_CODE_ERR BIT(2)
+#define DEC_STATUS_CUSTOM_CODE_ERR BIT(1)
+#define DEC_STATUS_REPEAT BIT(0)
+
+#define IRQSEL_DEC_MODE 0
+#define IRQSEL_RISE_FALL 1
+#define IRQSEL_FALL 2
+#define IRQSEL_RISE 3
+
+#define MESON_RAW_TRATE 10 /* us */
+#define MESON_HW_TRATE 20 /* us */
+
+/**
+ * struct meson_ir_protocol - describe IR Protocol parameter
+ *
+ * @hw_protocol: select IR Protocol from IR Controller
+ * @repeat_counter_enable: enable frame-to-frame time counter, it should work
+ * with @repeat_compare_enable to detect the repeat frame
+ * @repeat_check_enable: enable repeat time check for repeat detection
+ * @repeat_compare_enable: enable to compare frame for repeat frame detection.
+ * Some IR Protocol send the same data as repeat frame.
+ * In this case, it should work with
+ * @repeat_counter_enable to detect the repeat frame.
+ * @bit_order: bit order, LSB or MSB
+ * @bit1_match_enable: enable to check bit 1
+ * @hold_code_enable: hold frame code in register IR_DEC_FRAME1, the new one
+ * frame code will not be store in IR_DEC_FRAME1.
+ * until IR_DEC_FRAME1 has been read
+ * @count_tick_mode: increasing time unit of frame-to-frame time counter.
+ * 0 = 100us, 1 = 10us
+ * @code_length: length (N-1) of data frame
+ * @frame_time_max: max time for whole frame. Unit: MESON_HW_TRATE
+ * @leader_active_max: max time for NEC/RC6 leader active part. Unit: MESON_HW_TRATE
+ * @leader_active_min: min time for NEC/RC6 leader active part. Unit: MESON_HW_TRATE
+ * @leader_idle_max: max time for NEC/RC6 leader idle part. Unit: MESON_HW_TRATE
+ * @leader_idle_min: min time for NEC/RC6 leader idle part. Unit: MESON_HW_TRATE
+ * @repeat_leader_max: max time for NEC repeat leader idle part. Unit: MESON_HW_TRATE
+ * @repeat_leader_min: min time for NEC repeat leader idle part. Unit: MESON_HW_TRATE
+ * @bit0_max: max time for NEC Logic '0', half of RC6 trailer bit, XMP Logic '00'
+ * @bit0_min: min time for NEC Logic '0', half of RC6 trailer bit, XMP Logic '00'
+ * @bit1_max: max time for NEC Logic '1', whole of RC6 trailer bit, XMP Logic '01'
+ * @bit1_min: min time for NEC Logic '1', whole of RC6 trailer bit, XMP Logic '01'
+ * @duration2_max: max time for half of RC6 normal bit, XMP Logic '10'
+ * @duration2_min: min time for half of RC6 normal bit, XMP Logic '10'
+ * @duration3_max: max time for whole of RC6 normal bit, XMP Logic '11'
+ * @duration3_min: min time for whole of RC6 normal bit, XMP Logic '11'
+ */
+
+struct meson_ir_protocol {
+ u8 hw_protocol;
+ bool repeat_counter_enable;
+ bool repeat_check_enable;
+ bool repeat_compare_enable;
+ bool bit_order;
+ bool bit1_match_enable;
+ bool hold_code_enable;
+ bool count_tick_mode;
+ u8 code_length;
+ u16 frame_time_max;
+ u16 leader_active_max;
+ u16 leader_active_min;
+ u16 leader_idle_max;
+ u16 leader_idle_min;
+ u16 repeat_leader_max;
+ u16 repeat_leader_min;
+ u16 bit0_max;
+ u16 bit0_min;
+ u16 bit1_max;
+ u16 bit1_min;
+ u16 duration2_max;
+ u16 duration2_min;
+ u16 duration3_max;
+ u16 duration3_min;
+};
+
+struct meson_ir_param {
+ bool support_hw_decoder;
+ unsigned int max_register;
+};
+
+struct meson_ir {
+ const struct meson_ir_param *param;
+ struct regmap *reg;
+ struct rc_dev *rc;
+ spinlock_t lock;
+};
+
+static struct regmap_config meson_ir_regmap_config = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+};
+
+static const struct meson_ir_protocol protocol_timings[] = {
+ /* protocol, repeat counter, repeat check, repeat compare, order */
+ {DEC_MODE_NEC, false, false, false, FRAME_LSB_FIRST,
+ /* bit 1 match, hold code, count tick, len, frame time */
+ true, false, false, 32, 4000,
+ /* leader active max/min, leader idle max/min, repeat leader max/min */
+ 500, 400, 300, 200, 150, 80,
+ /* bit0 max/min, bit1 max/min, duration2 max/min, duration3 max/min */
+ 72, 40, 134, 90, 0, 0, 0, 0}
+};
+
+static void meson_ir_nec_handler(struct meson_ir *ir)
+{
+ u32 code = 0;
+ u32 status = 0;
+ enum rc_proto proto;
+
+ regmap_read(ir->reg, IR_DEC_STATUS, &status);
+
+ if (status & DEC_STATUS_REPEAT) {
+ rc_repeat(ir->rc);
+ } else {
+ regmap_read(ir->reg, IR_DEC_FRAME, &code);
+
+ code = ir_nec_bytes_to_scancode(code, code >> 8,
+ code >> 16, code >> 24, &proto);
+ rc_keydown(ir->rc, proto, code, 0);
+ }
+}
+
+static void meson_ir_hw_handler(struct meson_ir *ir)
+{
+ if (ir->rc->enabled_protocols & RC_PROTO_BIT_NEC)
+ meson_ir_nec_handler(ir);
+}
+
+static irqreturn_t meson_ir_irq(int irqno, void *dev_id)
+{
+ struct meson_ir *ir = dev_id;
+ u32 duration, status;
+ struct ir_raw_event rawir = {};
+
+ spin_lock(&ir->lock);
+
+ regmap_read(ir->reg, IR_DEC_STATUS, &status);
+
+ if (ir->rc->driver_type == RC_DRIVER_IR_RAW) {
+ rawir.pulse = !!(status & IR_DEC_STATUS_PULSE);
+
+ regmap_read(ir->reg, IR_DEC_REG1, &duration);
+ duration = FIELD_GET(IR_DEC_REG1_TIME_IV, duration);
+ rawir.duration = duration * MESON_RAW_TRATE;
+
+ ir_raw_event_store_with_timeout(ir->rc, &rawir);
+ } else if (ir->rc->driver_type == RC_DRIVER_SCANCODE) {
+ if (status & DEC_STATUS_VALID)
+ meson_ir_hw_handler(ir);
+ }
+
+ spin_unlock(&ir->lock);
+
+ return IRQ_HANDLED;
+}
+
+static int meson_ir_hw_decoder_init(struct rc_dev *dev, u64 *rc_type)
+{
+ u8 protocol;
+ u32 regval;
+ int i;
+ unsigned long flags;
+ const struct meson_ir_protocol *timings;
+ struct meson_ir *ir = dev->priv;
+
+ if (*rc_type & RC_PROTO_BIT_NEC)
+ protocol = DEC_MODE_NEC;
+ else
+ return 0;
+
+ for (i = 0; i < ARRAY_SIZE(protocol_timings); i++)
+ if (protocol_timings[i].hw_protocol == protocol)
+ break;
+
+ if (i == ARRAY_SIZE(protocol_timings)) {
+ dev_err(&dev->dev, "hw protocol isn't supported: %d\n",
+ protocol);
+ return -EINVAL;
+ }
+ timings = &protocol_timings[i];
+
+ spin_lock_irqsave(&ir->lock, flags);
+
+ /* Clear controller status */
+ regmap_read(ir->reg, IR_DEC_STATUS, &regval);
+ regmap_read(ir->reg, IR_DEC_FRAME, &regval);
+
+ /* Reset ir decoder and disable decoder */
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE, 0);
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET,
+ IR_DEC_REG1_RESET);
+
+ /* Base time resolution, (19+1)*1us=20us */
+ regval = FIELD_PREP(IR_DEC_REG0_BASE_TIME, MESON_HW_TRATE - 1);
+ regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_BASE_TIME, regval);
+
+ /* Monitor timing for input filter */
+ regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_FILTER,
+ FIELD_PREP(IR_DEC_REG0_FILTER, 7));
+
+ /* HW protocol */
+ regval = FIELD_PREP(IR_DEC_REG2_MODE, timings->hw_protocol);
+ regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_MODE, regval);
+
+ /* Hold frame data until register was read */
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_HOLD_CODE,
+ timings->hold_code_enable ?
+ IR_DEC_REG1_HOLD_CODE : 0);
+
+ /* Bit order */
+ regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_BIT_ORDER,
+ timings->bit_order ? IR_DEC_REG2_BIT_ORDER : 0);
+
+ /* Select tick mode */
+ regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_TICK_MODE,
+ timings->count_tick_mode ?
+ IR_DEC_REG2_TICK_MODE : 0);
+
+ /*
+ * Some protocols transmit the same data frame as repeat frame
+ * when the key is pressing. In this case, it could be detected as
+ * repeat frame if the repeat checker was enabled.
+ */
+ regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_REPEAT_COUNTER,
+ timings->repeat_counter_enable ?
+ IR_DEC_REG2_REPEAT_COUNTER : 0);
+ regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_REPEAT_TIME,
+ timings->repeat_check_enable ?
+ IR_DEC_REG2_REPEAT_TIME : 0);
+ regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_COMPARE_FRAME,
+ timings->repeat_compare_enable ?
+ IR_DEC_REG2_COMPARE_FRAME : 0);
+
+ /*
+ * FRAME_TIME_MAX should be larger than the time between
+ * data frame and repeat frame
+ */
+ regval = FIELD_PREP(IR_DEC_REG0_FRAME_TIME_MAX,
+ timings->frame_time_max);
+ regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_FRAME_TIME_MAX,
+ regval);
+
+ /* Length(N-1) of data frame */
+ regval = FIELD_PREP(IR_DEC_REG1_FRAME_LEN, timings->code_length - 1);
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_FRAME_LEN, regval);
+
+ /* Time for leader active part */
+ regval = FIELD_PREP(IR_DEC_LDR_ACTIVE_MAX,
+ timings->leader_active_max) |
+ FIELD_PREP(IR_DEC_LDR_ACTIVE_MIN,
+ timings->leader_active_min);
+ regmap_update_bits(ir->reg, IR_DEC_LDR_ACTIVE, IR_DEC_LDR_ACTIVE_MAX |
+ IR_DEC_LDR_ACTIVE_MIN, regval);
+
+ /* Time for leader idle part */
+ regval = FIELD_PREP(IR_DEC_LDR_IDLE_MAX, timings->leader_idle_max) |
+ FIELD_PREP(IR_DEC_LDR_IDLE_MIN, timings->leader_idle_min);
+ regmap_update_bits(ir->reg, IR_DEC_LDR_IDLE,
+ IR_DEC_LDR_IDLE_MAX | IR_DEC_LDR_IDLE_MIN, regval);
+
+ /* Time for repeat leader idle part */
+ regval = FIELD_PREP(IR_DEC_LDR_REPEAT_MAX, timings->repeat_leader_max) |
+ FIELD_PREP(IR_DEC_LDR_REPEAT_MIN, timings->repeat_leader_min);
+ regmap_update_bits(ir->reg, IR_DEC_LDR_REPEAT, IR_DEC_LDR_REPEAT_MAX |
+ IR_DEC_LDR_REPEAT_MIN, regval);
+
+ /*
+ * NEC: Time for logic '0'
+ * RC6: Time for half of trailer bit
+ */
+ regval = FIELD_PREP(IR_DEC_BIT_0_MAX, timings->bit0_max) |
+ FIELD_PREP(IR_DEC_BIT_0_MIN, timings->bit0_min);
+ regmap_update_bits(ir->reg, IR_DEC_BIT_0,
+ IR_DEC_BIT_0_MAX | IR_DEC_BIT_0_MIN, regval);
+
+ /*
+ * NEC: Time for logic '1'
+ * RC6: Time for whole of trailer bit
+ */
+ regval = FIELD_PREP(IR_DEC_STATUS_BIT_1_MAX, timings->bit1_max) |
+ FIELD_PREP(IR_DEC_STATUS_BIT_1_MIN, timings->bit1_min);
+ regmap_update_bits(ir->reg, IR_DEC_STATUS, IR_DEC_STATUS_BIT_1_MAX |
+ IR_DEC_STATUS_BIT_1_MIN, regval);
+
+ /* Enable to match logic '1' */
+ regmap_update_bits(ir->reg, IR_DEC_STATUS, IR_DEC_STATUS_BIT_1_ENABLE,
+ timings->bit1_match_enable ?
+ IR_DEC_STATUS_BIT_1_ENABLE : 0);
+
+ /*
+ * NEC: Unused
+ * RC6: Time for halt of logic 0/1
+ */
+ regval = FIELD_PREP(IR_DEC_DURATN2_MAX, timings->duration2_max) |
+ FIELD_PREP(IR_DEC_DURATN2_MIN, timings->duration2_min);
+ regmap_update_bits(ir->reg, IR_DEC_DURATN2,
+ IR_DEC_DURATN2_MAX | IR_DEC_DURATN2_MIN, regval);
+
+ /*
+ * NEC: Unused
+ * RC6: Time for whole logic 0/1
+ */
+ regval = FIELD_PREP(IR_DEC_DURATN3_MAX, timings->duration3_max) |
+ FIELD_PREP(IR_DEC_DURATN3_MIN, timings->duration3_min);
+ regmap_update_bits(ir->reg, IR_DEC_DURATN3,
+ IR_DEC_DURATN3_MAX | IR_DEC_DURATN3_MIN, regval);
+
+ /* Reset ir decoder and enable decode */
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET,
+ IR_DEC_REG1_RESET);
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET, 0);
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE,
+ IR_DEC_REG1_ENABLE);
+
+ spin_unlock_irqrestore(&ir->lock, flags);
+
+ dev_info(&dev->dev, "hw decoder init, protocol: %d\n", protocol);
+
+ return 0;
+}
+
+static void meson_ir_sw_decoder_init(struct rc_dev *dev)
+{
+ unsigned long flags;
+ struct meson_ir *ir = dev->priv;
+
+ spin_lock_irqsave(&ir->lock, flags);
+
+ /* Reset the decoder */
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET,
+ IR_DEC_REG1_RESET);
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET, 0);
+
+ /* Set general operation mode (= raw/software decoding) */
+ if (of_device_is_compatible(dev->dev.of_node, "amlogic,meson6-ir"))
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_MODE,
+ FIELD_PREP(IR_DEC_REG1_MODE,
+ DEC_MODE_RAW));
+ else
+ regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_MODE,
+ FIELD_PREP(IR_DEC_REG2_MODE,
+ DEC_MODE_RAW));
+
+ /* Set rate */
+ regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_BASE_TIME,
+ FIELD_PREP(IR_DEC_REG0_BASE_TIME,
+ MESON_RAW_TRATE - 1));
+ /* IRQ on rising and falling edges */
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_IRQSEL,
+ FIELD_PREP(IR_DEC_REG1_IRQSEL, IRQSEL_RISE_FALL));
+ /* Enable the decoder */
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE,
+ IR_DEC_REG1_ENABLE);
+
+ spin_unlock_irqrestore(&ir->lock, flags);
+
+ dev_info(&dev->dev, "sw decoder init\n");
+}
+
+static int meson_ir_probe(struct platform_device *pdev)
+{
+ const struct meson_ir_param *match_data;
+ struct device *dev = &pdev->dev;
+ struct device_node *node = dev->of_node;
+ void __iomem *res_start;
+ const char *map_name;
+ struct meson_ir *ir;
+ int irq, ret;
+
+ ir = devm_kzalloc(dev, sizeof(struct meson_ir), GFP_KERNEL);
+ if (!ir)
+ return -ENOMEM;
+
+ match_data = of_device_get_match_data(dev);
+ if (!match_data)
+ return dev_err_probe(dev, -ENODEV, "failed to get match data\n");
+
+ ir->param = match_data;
+
+ res_start = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(res_start))
+ return PTR_ERR(res_start);
+
+ meson_ir_regmap_config.max_register = ir->param->max_register;
+ ir->reg = devm_regmap_init_mmio(&pdev->dev, res_start,
+ &meson_ir_regmap_config);
+ if (IS_ERR(ir->reg))
+ return PTR_ERR(ir->reg);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ if (ir->param->support_hw_decoder)
+ ir->rc = devm_rc_allocate_device(&pdev->dev,
+ RC_DRIVER_SCANCODE);
+ else
+ ir->rc = devm_rc_allocate_device(&pdev->dev, RC_DRIVER_IR_RAW);
+
+ if (!ir->rc) {
+ dev_err(dev, "failed to allocate rc device\n");
+ return -ENOMEM;
+ }
+
+ if (ir->rc->driver_type == RC_DRIVER_IR_RAW) {
+ ir->rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
+ ir->rc->rx_resolution = MESON_RAW_TRATE;
+ ir->rc->min_timeout = 1;
+ ir->rc->timeout = IR_DEFAULT_TIMEOUT;
+ ir->rc->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
+ } else if (ir->rc->driver_type == RC_DRIVER_SCANCODE) {
+ ir->rc->allowed_protocols = RC_PROTO_BIT_NEC;
+ ir->rc->change_protocol = meson_ir_hw_decoder_init;
+ }
+
+ ir->rc->priv = ir;
+ ir->rc->device_name = DRIVER_NAME;
+ ir->rc->input_phys = DRIVER_NAME "/input0";
+ ir->rc->input_id.bustype = BUS_HOST;
+ map_name = of_get_property(node, "linux,rc-map-name", NULL);
+ ir->rc->map_name = map_name ? map_name : RC_MAP_EMPTY;
+ ir->rc->driver_name = DRIVER_NAME;
+
+ spin_lock_init(&ir->lock);
+ platform_set_drvdata(pdev, ir);
+
+ ret = devm_rc_register_device(dev, ir->rc);
+ if (ret) {
+ dev_err(dev, "failed to register rc device\n");
+ return ret;
+ }
+
+ if (ir->rc->driver_type == RC_DRIVER_IR_RAW)
+ meson_ir_sw_decoder_init(ir->rc);
+
+ ret = devm_request_irq(dev, irq, meson_ir_irq, 0, "meson_ir", ir);
+ if (ret) {
+ dev_err(dev, "failed to request irq\n");
+ return ret;
+ }
+
+ dev_info(dev, "receiver initialized\n");
+
+ return 0;
+}
+
+static void meson_ir_remove(struct platform_device *pdev)
+{
+ struct meson_ir *ir = platform_get_drvdata(pdev);
+ unsigned long flags;
+
+ /* Disable the decoder */
+ spin_lock_irqsave(&ir->lock, flags);
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE, 0);
+ spin_unlock_irqrestore(&ir->lock, flags);
+}
+
+static void meson_ir_shutdown(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *node = dev->of_node;
+ struct meson_ir *ir = platform_get_drvdata(pdev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&ir->lock, flags);
+
+ /*
+ * Set operation mode to NEC/hardware decoding to give
+ * bootloader a chance to power the system back on
+ */
+ if (of_device_is_compatible(node, "amlogic,meson6-ir"))
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_MODE,
+ FIELD_PREP(IR_DEC_REG1_MODE, DEC_MODE_NEC));
+ else
+ regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_MODE,
+ FIELD_PREP(IR_DEC_REG2_MODE, DEC_MODE_NEC));
+
+ /* Set rate to default value */
+ regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_BASE_TIME,
+ FIELD_PREP(IR_DEC_REG0_BASE_TIME,
+ MESON_HW_TRATE - 1));
+
+ spin_unlock_irqrestore(&ir->lock, flags);
+}
+
+static __maybe_unused int meson_ir_resume(struct device *dev)
+{
+ struct meson_ir *ir = dev_get_drvdata(dev);
+
+ if (ir->param->support_hw_decoder)
+ meson_ir_hw_decoder_init(ir->rc, &ir->rc->enabled_protocols);
+ else
+ meson_ir_sw_decoder_init(ir->rc);
+
+ return 0;
+}
+
+static __maybe_unused int meson_ir_suspend(struct device *dev)
+{
+ struct meson_ir *ir = dev_get_drvdata(dev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&ir->lock, flags);
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE, 0);
+ spin_unlock_irqrestore(&ir->lock, flags);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(meson_ir_pm_ops, meson_ir_suspend, meson_ir_resume);
+
+static const struct meson_ir_param meson6_ir_param = {
+ .support_hw_decoder = false,
+ .max_register = IR_DEC_REG1,
+};
+
+static const struct meson_ir_param meson8b_ir_param = {
+ .support_hw_decoder = false,
+ .max_register = IR_DEC_REG2,
+};
+
+static const struct meson_ir_param meson_s4_ir_param = {
+ .support_hw_decoder = true,
+ .max_register = IR_DEC_FRAME1,
+};
+
+static const struct of_device_id meson_ir_match[] = {
+ {
+ .compatible = "amlogic,meson6-ir",
+ .data = &meson6_ir_param,
+ }, {
+ .compatible = "amlogic,meson8b-ir",
+ .data = &meson8b_ir_param,
+ }, {
+ .compatible = "amlogic,meson-gxbb-ir",
+ .data = &meson8b_ir_param,
+ }, {
+ .compatible = "amlogic,meson-s4-ir",
+ .data = &meson_s4_ir_param,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, meson_ir_match);
+
+static struct platform_driver meson_ir_driver = {
+ .probe = meson_ir_probe,
+ .remove = meson_ir_remove,
+ .shutdown = meson_ir_shutdown,
+ .driver = {
+ .name = DRIVER_NAME,
+ .of_match_table = meson_ir_match,
+ .pm = pm_ptr(&meson_ir_pm_ops),
+ },
+};
+
+module_platform_driver(meson_ir_driver);
+
+MODULE_DESCRIPTION("Amlogic Meson IR remote receiver driver");
+MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
+MODULE_LICENSE("GPL v2");
generated by cgit (git 2.34.1) at 2025-12-25 09:14:11 +0000