mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 01:10:04 +00:00
media: rc: Add driver for tango HW IR decoder
The tango HW IR decoder supports NEC, RC-5, RC-6 protocols. Signed-off-by: Mans Rullgard <mans@mansr.com> Signed-off-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com> Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
parent
5248e34b3f
commit
d345527331
3 changed files with 292 additions and 0 deletions
|
@ -472,6 +472,16 @@ config IR_SIR
|
|||
To compile this driver as a module, choose M here: the module will
|
||||
be called sir-ir.
|
||||
|
||||
config IR_TANGO
|
||||
tristate "Sigma Designs SMP86xx IR decoder"
|
||||
depends on RC_CORE
|
||||
depends on ARCH_TANGO || COMPILE_TEST
|
||||
---help---
|
||||
Adds support for the HW IR decoder embedded on Sigma Designs
|
||||
Tango-based systems (SMP86xx, SMP87xx).
|
||||
The HW decoder supports NEC, RC-5, RC-6 IR protocols.
|
||||
When compiled as a module, look for tango-ir.
|
||||
|
||||
config IR_ZX
|
||||
tristate "ZTE ZX IR remote control"
|
||||
depends on RC_CORE
|
||||
|
|
|
@ -44,3 +44,4 @@ obj-$(CONFIG_IR_SERIAL) += serial_ir.o
|
|||
obj-$(CONFIG_IR_SIR) += sir_ir.o
|
||||
obj-$(CONFIG_IR_MTK) += mtk-cir.o
|
||||
obj-$(CONFIG_IR_ZX) += zx-irdec.o
|
||||
obj-$(CONFIG_IR_TANGO) += tango-ir.o
|
||||
|
|
281
drivers/media/rc/tango-ir.c
Normal file
281
drivers/media/rc/tango-ir.c
Normal file
|
@ -0,0 +1,281 @@
|
|||
/*
|
||||
* Copyright (C) 2015 Mans Rullgard <mans@mansr.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
* option) any later version.
|
||||
*/
|
||||
|
||||
#include <linux/input.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/of.h>
|
||||
#include <media/rc-core.h>
|
||||
|
||||
#define DRIVER_NAME "tango-ir"
|
||||
|
||||
#define IR_NEC_CTRL 0x00
|
||||
#define IR_NEC_DATA 0x04
|
||||
#define IR_CTRL 0x08
|
||||
#define IR_RC5_CLK_DIV 0x0c
|
||||
#define IR_RC5_DATA 0x10
|
||||
#define IR_INT 0x14
|
||||
|
||||
#define NEC_TIME_BASE 560
|
||||
#define RC5_TIME_BASE 1778
|
||||
|
||||
#define RC6_CTRL 0x00
|
||||
#define RC6_CLKDIV 0x04
|
||||
#define RC6_DATA0 0x08
|
||||
#define RC6_DATA1 0x0c
|
||||
#define RC6_DATA2 0x10
|
||||
#define RC6_DATA3 0x14
|
||||
#define RC6_DATA4 0x18
|
||||
|
||||
#define RC6_CARRIER 36000
|
||||
#define RC6_TIME_BASE 16
|
||||
|
||||
#define NEC_CAP(n) ((n) << 24)
|
||||
#define GPIO_SEL(n) ((n) << 16)
|
||||
#define DISABLE_NEC (BIT(4) | BIT(8))
|
||||
#define ENABLE_RC5 (BIT(0) | BIT(9))
|
||||
#define ENABLE_RC6 (BIT(0) | BIT(7))
|
||||
#define ACK_IR_INT (BIT(0) | BIT(1))
|
||||
#define ACK_RC6_INT (BIT(31))
|
||||
|
||||
#define NEC_ANY (RC_PROTO_BIT_NEC | RC_PROTO_BIT_NECX | RC_PROTO_BIT_NEC32)
|
||||
|
||||
struct tango_ir {
|
||||
void __iomem *rc5_base;
|
||||
void __iomem *rc6_base;
|
||||
struct rc_dev *rc;
|
||||
struct clk *clk;
|
||||
};
|
||||
|
||||
static void tango_ir_handle_nec(struct tango_ir *ir)
|
||||
{
|
||||
u32 v, code;
|
||||
enum rc_proto proto;
|
||||
|
||||
v = readl_relaxed(ir->rc5_base + IR_NEC_DATA);
|
||||
if (!v) {
|
||||
rc_repeat(ir->rc);
|
||||
return;
|
||||
}
|
||||
|
||||
code = ir_nec_bytes_to_scancode(v, v >> 8, v >> 16, v >> 24, &proto);
|
||||
rc_keydown(ir->rc, proto, code, 0);
|
||||
}
|
||||
|
||||
static void tango_ir_handle_rc5(struct tango_ir *ir)
|
||||
{
|
||||
u32 data, field, toggle, addr, cmd, code;
|
||||
|
||||
data = readl_relaxed(ir->rc5_base + IR_RC5_DATA);
|
||||
if (data & BIT(31))
|
||||
return;
|
||||
|
||||
field = data >> 12 & 1;
|
||||
toggle = data >> 11 & 1;
|
||||
addr = data >> 6 & 0x1f;
|
||||
cmd = (data & 0x3f) | (field ^ 1) << 6;
|
||||
|
||||
code = RC_SCANCODE_RC5(addr, cmd);
|
||||
rc_keydown(ir->rc, RC_PROTO_RC5, code, toggle);
|
||||
}
|
||||
|
||||
static void tango_ir_handle_rc6(struct tango_ir *ir)
|
||||
{
|
||||
u32 data0, data1, toggle, mode, addr, cmd, code;
|
||||
|
||||
data0 = readl_relaxed(ir->rc6_base + RC6_DATA0);
|
||||
data1 = readl_relaxed(ir->rc6_base + RC6_DATA1);
|
||||
|
||||
mode = data0 >> 1 & 7;
|
||||
if (mode != 0)
|
||||
return;
|
||||
|
||||
toggle = data0 & 1;
|
||||
addr = data0 >> 16;
|
||||
cmd = data1;
|
||||
|
||||
code = RC_SCANCODE_RC6_0(addr, cmd);
|
||||
rc_keydown(ir->rc, RC_PROTO_RC6_0, code, toggle);
|
||||
}
|
||||
|
||||
static irqreturn_t tango_ir_irq(int irq, void *dev_id)
|
||||
{
|
||||
struct tango_ir *ir = dev_id;
|
||||
unsigned int rc5_stat;
|
||||
unsigned int rc6_stat;
|
||||
|
||||
rc5_stat = readl_relaxed(ir->rc5_base + IR_INT);
|
||||
writel_relaxed(rc5_stat, ir->rc5_base + IR_INT);
|
||||
|
||||
rc6_stat = readl_relaxed(ir->rc6_base + RC6_CTRL);
|
||||
writel_relaxed(rc6_stat, ir->rc6_base + RC6_CTRL);
|
||||
|
||||
if (!(rc5_stat & 3) && !(rc6_stat & BIT(31)))
|
||||
return IRQ_NONE;
|
||||
|
||||
if (rc5_stat & BIT(0))
|
||||
tango_ir_handle_rc5(ir);
|
||||
|
||||
if (rc5_stat & BIT(1))
|
||||
tango_ir_handle_nec(ir);
|
||||
|
||||
if (rc6_stat & BIT(31))
|
||||
tango_ir_handle_rc6(ir);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int tango_change_protocol(struct rc_dev *dev, u64 *rc_type)
|
||||
{
|
||||
struct tango_ir *ir = dev->priv;
|
||||
u32 rc5_ctrl = DISABLE_NEC;
|
||||
u32 rc6_ctrl = 0;
|
||||
|
||||
if (*rc_type & NEC_ANY)
|
||||
rc5_ctrl = 0;
|
||||
|
||||
if (*rc_type & RC_PROTO_BIT_RC5)
|
||||
rc5_ctrl |= ENABLE_RC5;
|
||||
|
||||
if (*rc_type & RC_PROTO_BIT_RC6_0)
|
||||
rc6_ctrl = ENABLE_RC6;
|
||||
|
||||
writel_relaxed(rc5_ctrl, ir->rc5_base + IR_CTRL);
|
||||
writel_relaxed(rc6_ctrl, ir->rc6_base + RC6_CTRL);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tango_ir_probe(struct platform_device *pdev)
|
||||
{
|
||||
const char *map_name = RC_MAP_TANGO;
|
||||
struct device *dev = &pdev->dev;
|
||||
struct rc_dev *rc;
|
||||
struct tango_ir *ir;
|
||||
struct resource *rc5_res;
|
||||
struct resource *rc6_res;
|
||||
u64 clkrate, clkdiv;
|
||||
int irq, err;
|
||||
u32 val;
|
||||
|
||||
rc5_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
if (!rc5_res)
|
||||
return -EINVAL;
|
||||
|
||||
rc6_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
||||
if (!rc6_res)
|
||||
return -EINVAL;
|
||||
|
||||
irq = platform_get_irq(pdev, 0);
|
||||
if (irq <= 0)
|
||||
return -EINVAL;
|
||||
|
||||
ir = devm_kzalloc(dev, sizeof(*ir), GFP_KERNEL);
|
||||
if (!ir)
|
||||
return -ENOMEM;
|
||||
|
||||
ir->rc5_base = devm_ioremap_resource(dev, rc5_res);
|
||||
if (IS_ERR(ir->rc5_base))
|
||||
return PTR_ERR(ir->rc5_base);
|
||||
|
||||
ir->rc6_base = devm_ioremap_resource(dev, rc6_res);
|
||||
if (IS_ERR(ir->rc6_base))
|
||||
return PTR_ERR(ir->rc6_base);
|
||||
|
||||
ir->clk = devm_clk_get(dev, NULL);
|
||||
if (IS_ERR(ir->clk))
|
||||
return PTR_ERR(ir->clk);
|
||||
|
||||
rc = devm_rc_allocate_device(dev, RC_DRIVER_SCANCODE);
|
||||
if (!rc)
|
||||
return -ENOMEM;
|
||||
|
||||
of_property_read_string(dev->of_node, "linux,rc-map-name", &map_name);
|
||||
|
||||
rc->device_name = DRIVER_NAME;
|
||||
rc->driver_name = DRIVER_NAME;
|
||||
rc->input_phys = DRIVER_NAME "/input0";
|
||||
rc->map_name = map_name;
|
||||
rc->allowed_protocols = NEC_ANY | RC_PROTO_BIT_RC5 | RC_PROTO_BIT_RC6_0;
|
||||
rc->change_protocol = tango_change_protocol;
|
||||
rc->priv = ir;
|
||||
ir->rc = rc;
|
||||
|
||||
err = clk_prepare_enable(ir->clk);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
clkrate = clk_get_rate(ir->clk);
|
||||
|
||||
clkdiv = clkrate * NEC_TIME_BASE;
|
||||
do_div(clkdiv, 1000000);
|
||||
|
||||
val = NEC_CAP(31) | GPIO_SEL(12) | clkdiv;
|
||||
writel_relaxed(val, ir->rc5_base + IR_NEC_CTRL);
|
||||
|
||||
clkdiv = clkrate * RC5_TIME_BASE;
|
||||
do_div(clkdiv, 1000000);
|
||||
|
||||
writel_relaxed(DISABLE_NEC, ir->rc5_base + IR_CTRL);
|
||||
writel_relaxed(clkdiv, ir->rc5_base + IR_RC5_CLK_DIV);
|
||||
writel_relaxed(ACK_IR_INT, ir->rc5_base + IR_INT);
|
||||
|
||||
clkdiv = clkrate * RC6_TIME_BASE;
|
||||
do_div(clkdiv, RC6_CARRIER);
|
||||
|
||||
writel_relaxed(ACK_RC6_INT, ir->rc6_base + RC6_CTRL);
|
||||
writel_relaxed((clkdiv >> 2) << 18 | clkdiv, ir->rc6_base + RC6_CLKDIV);
|
||||
|
||||
err = devm_request_irq(dev, irq, tango_ir_irq, IRQF_SHARED,
|
||||
dev_name(dev), ir);
|
||||
if (err)
|
||||
goto err_clk;
|
||||
|
||||
err = devm_rc_register_device(dev, rc);
|
||||
if (err)
|
||||
goto err_clk;
|
||||
|
||||
platform_set_drvdata(pdev, ir);
|
||||
return 0;
|
||||
|
||||
err_clk:
|
||||
clk_disable_unprepare(ir->clk);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int tango_ir_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct tango_ir *ir = platform_get_drvdata(pdev);
|
||||
|
||||
clk_disable_unprepare(ir->clk);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id tango_ir_dt_ids[] = {
|
||||
{ .compatible = "sigma,smp8642-ir" },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, tango_ir_dt_ids);
|
||||
|
||||
static struct platform_driver tango_ir_driver = {
|
||||
.probe = tango_ir_probe,
|
||||
.remove = tango_ir_remove,
|
||||
.driver = {
|
||||
.name = DRIVER_NAME,
|
||||
.of_match_table = tango_ir_dt_ids,
|
||||
},
|
||||
};
|
||||
module_platform_driver(tango_ir_driver);
|
||||
|
||||
MODULE_DESCRIPTION("SMP86xx IR decoder driver");
|
||||
MODULE_AUTHOR("Mans Rullgard <mans@mansr.com>");
|
||||
MODULE_LICENSE("GPL");
|
Loading…
Reference in a new issue