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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.c122
1 files changed, 60 insertions, 62 deletions
diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c
index 49aa309d1a8c..70322fab34ac 100644
--- a/drivers/media/rc/meson-ir.c
+++ b/drivers/media/rc/meson-ir.c
@@ -10,71 +10,57 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
-#include <linux/of_platform.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"
-/* valid on all Meson platforms */
#define IR_DEC_LDR_ACTIVE 0x00
#define IR_DEC_LDR_IDLE 0x04
#define IR_DEC_LDR_REPEAT 0x08
#define IR_DEC_BIT_0 0x0c
#define IR_DEC_REG0 0x10
+#define IR_DEC_REG0_BASE_TIME GENMASK(11, 0)
#define IR_DEC_FRAME 0x14
#define IR_DEC_STATUS 0x18
+#define IR_DEC_STATUS_PULSE BIT(8)
#define IR_DEC_REG1 0x1c
-/* only available on Meson 8b and newer */
+#define IR_DEC_REG1_TIME_IV GENMASK(28, 16)
+#define IR_DEC_REG1_ENABLE BIT(15)
+#define IR_DEC_REG1_MODE GENMASK(8, 7)
+#define IR_DEC_REG1_IRQSEL GENMASK(3, 2)
+#define IR_DEC_REG1_RESET BIT(0)
+/* The following regs are only available on Meson 8b and newer */
#define IR_DEC_REG2 0x20
+#define IR_DEC_REG2_MODE GENMASK(3, 0)
-#define REG0_RATE_MASK GENMASK(11, 0)
+#define DEC_MODE_NEC 0x0
+#define DEC_MODE_RAW 0x2
-#define DECODE_MODE_NEC 0x0
-#define DECODE_MODE_RAW 0x2
+#define IRQSEL_NEC_MODE 0
+#define IRQSEL_RISE_FALL 1
+#define IRQSEL_FALL 2
+#define IRQSEL_RISE 3
-/* Meson 6b uses REG1 to configure the mode */
-#define REG1_MODE_MASK GENMASK(8, 7)
-#define REG1_MODE_SHIFT 7
-
-/* Meson 8b / GXBB use REG2 to configure the mode */
-#define REG2_MODE_MASK GENMASK(3, 0)
-#define REG2_MODE_SHIFT 0
-
-#define REG1_TIME_IV_MASK GENMASK(28, 16)
-
-#define REG1_IRQSEL_MASK GENMASK(3, 2)
-#define REG1_IRQSEL_NEC_MODE 0
-#define REG1_IRQSEL_RISE_FALL 1
-#define REG1_IRQSEL_FALL 2
-#define REG1_IRQSEL_RISE 3
-
-#define REG1_RESET BIT(0)
-#define REG1_ENABLE BIT(15)
-
-#define STATUS_IR_DEC_IN BIT(8)
-
-#define MESON_TRATE 10 /* us */
+#define MESON_RAW_TRATE 10 /* us */
+#define MESON_HW_TRATE 20 /* us */
struct meson_ir {
- void __iomem *reg;
+ struct regmap *reg;
struct rc_dev *rc;
spinlock_t lock;
};
-static void meson_ir_set_mask(struct meson_ir *ir, unsigned int reg,
- u32 mask, u32 value)
-{
- u32 data;
-
- data = readl(ir->reg + reg);
- data &= ~mask;
- data |= (value & mask);
- writel(data, ir->reg + reg);
-}
+static const struct regmap_config meson_ir_regmap_config = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+};
static irqreturn_t meson_ir_irq(int irqno, void *dev_id)
{
@@ -84,12 +70,12 @@ static irqreturn_t meson_ir_irq(int irqno, void *dev_id)
spin_lock(&ir->lock);
- duration = readl_relaxed(ir->reg + IR_DEC_REG1);
- duration = FIELD_GET(REG1_TIME_IV_MASK, duration);
- rawir.duration = duration * MESON_TRATE;
+ regmap_read(ir->reg, IR_DEC_REG1, &duration);
+ duration = FIELD_GET(IR_DEC_REG1_TIME_IV, duration);
+ rawir.duration = duration * MESON_RAW_TRATE;
- status = readl_relaxed(ir->reg + IR_DEC_STATUS);
- rawir.pulse = !!(status & STATUS_IR_DEC_IN);
+ regmap_read(ir->reg, IR_DEC_STATUS, &status);
+ rawir.pulse = !!(status & IR_DEC_STATUS_PULSE);
ir_raw_event_store_with_timeout(ir->rc, &rawir);
@@ -102,6 +88,7 @@ static int meson_ir_probe(struct platform_device *pdev)
{
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;
@@ -110,7 +97,12 @@ static int meson_ir_probe(struct platform_device *pdev)
if (!ir)
return -ENOMEM;
- ir->reg = devm_platform_ioremap_resource(pdev, 0);
+ res_start = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(res_start))
+ return PTR_ERR(res_start);
+
+ ir->reg = devm_regmap_init_mmio(&pdev->dev, res_start,
+ &meson_ir_regmap_config);
if (IS_ERR(ir->reg))
return PTR_ERR(ir->reg);
@@ -131,7 +123,7 @@ static int meson_ir_probe(struct platform_device *pdev)
map_name = of_get_property(node, "linux,rc-map-name", NULL);
ir->rc->map_name = map_name ? map_name : RC_MAP_EMPTY;
ir->rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
- ir->rc->rx_resolution = MESON_TRATE;
+ 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;
@@ -153,24 +145,28 @@ static int meson_ir_probe(struct platform_device *pdev)
}
/* Reset the decoder */
- meson_ir_set_mask(ir, IR_DEC_REG1, REG1_RESET, REG1_RESET);
- meson_ir_set_mask(ir, IR_DEC_REG1, REG1_RESET, 0);
+ 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(node, "amlogic,meson6-ir"))
- meson_ir_set_mask(ir, IR_DEC_REG1, REG1_MODE_MASK,
- FIELD_PREP(REG1_MODE_MASK, DECODE_MODE_RAW));
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_MODE,
+ FIELD_PREP(IR_DEC_REG1_MODE, DEC_MODE_RAW));
else
- meson_ir_set_mask(ir, IR_DEC_REG2, REG2_MODE_MASK,
- FIELD_PREP(REG2_MODE_MASK, DECODE_MODE_RAW));
+ regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_MODE,
+ FIELD_PREP(IR_DEC_REG2_MODE, DEC_MODE_RAW));
/* Set rate */
- meson_ir_set_mask(ir, IR_DEC_REG0, REG0_RATE_MASK, MESON_TRATE - 1);
+ 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 */
- meson_ir_set_mask(ir, IR_DEC_REG1, REG1_IRQSEL_MASK,
- FIELD_PREP(REG1_IRQSEL_MASK, REG1_IRQSEL_RISE_FALL));
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_IRQSEL,
+ FIELD_PREP(IR_DEC_REG1_IRQSEL, IRQSEL_RISE_FALL));
/* Enable the decoder */
- meson_ir_set_mask(ir, IR_DEC_REG1, REG1_ENABLE, REG1_ENABLE);
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE,
+ IR_DEC_REG1_ENABLE);
dev_info(dev, "receiver initialized\n");
@@ -184,7 +180,7 @@ static void meson_ir_remove(struct platform_device *pdev)
/* Disable the decoder */
spin_lock_irqsave(&ir->lock, flags);
- meson_ir_set_mask(ir, IR_DEC_REG1, REG1_ENABLE, 0);
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE, 0);
spin_unlock_irqrestore(&ir->lock, flags);
}
@@ -202,14 +198,16 @@ static void meson_ir_shutdown(struct platform_device *pdev)
* bootloader a chance to power the system back on
*/
if (of_device_is_compatible(node, "amlogic,meson6-ir"))
- meson_ir_set_mask(ir, IR_DEC_REG1, REG1_MODE_MASK,
- DECODE_MODE_NEC << REG1_MODE_SHIFT);
+ regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_MODE,
+ FIELD_PREP(IR_DEC_REG1_MODE, DEC_MODE_NEC));
else
- meson_ir_set_mask(ir, IR_DEC_REG2, REG2_MODE_MASK,
- DECODE_MODE_NEC << REG2_MODE_SHIFT);
+ 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 */
- meson_ir_set_mask(ir, IR_DEC_REG0, REG0_RATE_MASK, 0x13);
+ 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);
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-12 00:59:53 +0300