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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-04 09:50:07 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-04 09:50:07 -0700 |
commit | 3c83e61e67256e0bb08c46cc2db43b58fd617251 (patch) | |
tree | 0233e1e04e6449c60b01ff5dea8bea85bcf22f08 /drivers/media/rc/img-ir/img-ir-core.c | |
parent | 4a4389abdd9822fdf3cc2ac6ed87eb811fd43acc (diff) | |
parent | a83b93a7480441a47856dc9104bea970e84cda87 (diff) | |
download | op-kernel-dev-3c83e61e67256e0bb08c46cc2db43b58fd617251.zip op-kernel-dev-3c83e61e67256e0bb08c46cc2db43b58fd617251.tar.gz |
Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media updates from Mauro Carvalho Chehab:
"The main set of series of patches for media subsystem, including:
- document RC sysfs class
- added an API to setup scancode to allow waking up systems using the
Remote Controller
- add API for SDR devices. Drivers are still on staging
- some API improvements for getting EDID data from media
inputs/outputs
- new DVB frontend driver for drx-j (ATSC)
- one driver (it913x/it9137) got removed, in favor of an improvement
on another driver (af9035)
- added a skeleton V4L2 PCI driver at documentation
- added a dual flash driver (lm3646)
- added a new IR driver (img-ir)
- added an IR scancode decoder for the Sharp protocol
- some improvements at the usbtv driver, to allow its core to be
reused.
- added a new SDR driver (rtl2832u_sdr)
- added a new tuner driver (msi001)
- several improvements at em28xx driver to fix PM support, device
removal and to split the V4L2 specific bits into a separate
sub-driver
- one driver got converted to videobuf2 (s2255drv)
- the e4000 tuner driver now follows an improved binding model
- some fixes at V4L2 compat32 code
- several fixes and enhancements at videobuf2 code
- some cleanups at V4L2 API documentation
- usual driver enhancements, new board additions and misc fixups"
[ NOTE! This merge effective drops commit 4329b93b283c ("of: Reduce
indentation in of_graph_get_next_endpoint").
The of_graph_get_next_endpoint() function was moved and renamed by
commit fd9fdb78a9bf ("[media] of: move graph helpers from
drivers/media/v4l2-core to drivers/of"). It was originally called
v4l2_of_get_next_endpoint() and lived in the file
drivers/media/v4l2-core/v4l2-of.c.
In that original location, it was then fixed to support empty port
nodes by commit b9db140c1e46 ("[media] v4l: of: Support empty port
nodes"), and that commit clashes badly with the dropped "Reduce
intendation" commit. I had to choose one or the other, and decided
that the "Support empty port nodes" commit was more important ]
* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (426 commits)
[media] em28xx-dvb: fix PCTV 461e tuner I2C binding
Revert "[media] em28xx-dvb: fix PCTV 461e tuner I2C binding"
[media] em28xx: fix PCTV 290e LNA oops
[media] em28xx-dvb: fix PCTV 461e tuner I2C binding
[media] m88ds3103: fix bug on .set_tone()
[media] saa7134: fix WARN_ON during resume
[media] v4l2-dv-timings: add module name, description, license
[media] videodev2.h: add parenthesis around macro arguments
[media] saa6752hs: depends on CRC32
[media] si4713: fix Kconfig dependencies
[media] Sensoray 2255 uses videobuf2
[media] adv7180: free an interrupt on failure paths in init_device()
[media] e4000: make VIDEO_V4L2 dependency optional
[media] af9033: Don't export functions for the hardware filter
[media] af9035: use af9033 PID filters
[media] af9033: implement PID filter
[media] rtl2832_sdr: do not use dynamic stack allocation
[media] e4000: fix 32-bit build error
[media] em28xx-audio: make sure audio is unmuted on open()
[media] DocBook media: v4l2_format_sdr was renamed to v4l2_sdr_format
...
Diffstat (limited to 'drivers/media/rc/img-ir/img-ir-core.c')
-rw-r--r-- | drivers/media/rc/img-ir/img-ir-core.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/drivers/media/rc/img-ir/img-ir-core.c b/drivers/media/rc/img-ir/img-ir-core.c new file mode 100644 index 0000000..6b78348 --- /dev/null +++ b/drivers/media/rc/img-ir/img-ir-core.c @@ -0,0 +1,176 @@ +/* + * ImgTec IR Decoder found in PowerDown Controller. + * + * Copyright 2010-2014 Imagination Technologies Ltd. + * + * This contains core img-ir code for setting up the driver. The two interfaces + * (raw and hardware decode) are handled separately. + */ + +#include <linux/clk.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include "img-ir.h" + +static irqreturn_t img_ir_isr(int irq, void *dev_id) +{ + struct img_ir_priv *priv = dev_id; + u32 irq_status; + + spin_lock(&priv->lock); + /* we have to clear irqs before reading */ + irq_status = img_ir_read(priv, IMG_IR_IRQ_STATUS); + img_ir_write(priv, IMG_IR_IRQ_CLEAR, irq_status); + + /* don't handle valid data irqs if we're only interested in matches */ + irq_status &= img_ir_read(priv, IMG_IR_IRQ_ENABLE); + + /* hand off edge interrupts to raw decode handler */ + if (irq_status & IMG_IR_IRQ_EDGE && img_ir_raw_enabled(&priv->raw)) + img_ir_isr_raw(priv, irq_status); + + /* hand off hardware match interrupts to hardware decode handler */ + if (irq_status & (IMG_IR_IRQ_DATA_MATCH | + IMG_IR_IRQ_DATA_VALID | + IMG_IR_IRQ_DATA2_VALID) && + img_ir_hw_enabled(&priv->hw)) + img_ir_isr_hw(priv, irq_status); + + spin_unlock(&priv->lock); + return IRQ_HANDLED; +} + +static void img_ir_setup(struct img_ir_priv *priv) +{ + /* start off with interrupts disabled */ + img_ir_write(priv, IMG_IR_IRQ_ENABLE, 0); + + img_ir_setup_raw(priv); + img_ir_setup_hw(priv); + + if (!IS_ERR(priv->clk)) + clk_prepare_enable(priv->clk); +} + +static void img_ir_ident(struct img_ir_priv *priv) +{ + u32 core_rev = img_ir_read(priv, IMG_IR_CORE_REV); + + dev_info(priv->dev, + "IMG IR Decoder (%d.%d.%d.%d) probed successfully\n", + (core_rev & IMG_IR_DESIGNER) >> IMG_IR_DESIGNER_SHIFT, + (core_rev & IMG_IR_MAJOR_REV) >> IMG_IR_MAJOR_REV_SHIFT, + (core_rev & IMG_IR_MINOR_REV) >> IMG_IR_MINOR_REV_SHIFT, + (core_rev & IMG_IR_MAINT_REV) >> IMG_IR_MAINT_REV_SHIFT); + dev_info(priv->dev, "Modes:%s%s\n", + img_ir_hw_enabled(&priv->hw) ? " hardware" : "", + img_ir_raw_enabled(&priv->raw) ? " raw" : ""); +} + +static int img_ir_probe(struct platform_device *pdev) +{ + struct img_ir_priv *priv; + struct resource *res_regs; + int irq, error, error2; + + /* Get resources from platform device */ + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "cannot find IRQ resource\n"); + return irq; + } + + /* Private driver data */ + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) { + dev_err(&pdev->dev, "cannot allocate device data\n"); + return -ENOMEM; + } + platform_set_drvdata(pdev, priv); + priv->dev = &pdev->dev; + spin_lock_init(&priv->lock); + + /* Ioremap the registers */ + res_regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + priv->reg_base = devm_ioremap_resource(&pdev->dev, res_regs); + if (IS_ERR(priv->reg_base)) + return PTR_ERR(priv->reg_base); + + /* Get core clock */ + priv->clk = devm_clk_get(&pdev->dev, "core"); + if (IS_ERR(priv->clk)) + dev_warn(&pdev->dev, "cannot get core clock resource\n"); + /* + * The driver doesn't need to know about the system ("sys") or power + * modulation ("mod") clocks yet + */ + + /* Set up raw & hw decoder */ + error = img_ir_probe_raw(priv); + error2 = img_ir_probe_hw(priv); + if (error && error2) + return (error == -ENODEV) ? error2 : error; + + /* Get the IRQ */ + priv->irq = irq; + error = request_irq(priv->irq, img_ir_isr, 0, "img-ir", priv); + if (error) { + dev_err(&pdev->dev, "cannot register IRQ %u\n", + priv->irq); + error = -EIO; + goto err_irq; + } + + img_ir_ident(priv); + img_ir_setup(priv); + + return 0; + +err_irq: + img_ir_remove_hw(priv); + img_ir_remove_raw(priv); + return error; +} + +static int img_ir_remove(struct platform_device *pdev) +{ + struct img_ir_priv *priv = platform_get_drvdata(pdev); + + free_irq(priv->irq, img_ir_isr); + img_ir_remove_hw(priv); + img_ir_remove_raw(priv); + + if (!IS_ERR(priv->clk)) + clk_disable_unprepare(priv->clk); + return 0; +} + +static SIMPLE_DEV_PM_OPS(img_ir_pmops, img_ir_suspend, img_ir_resume); + +static const struct of_device_id img_ir_match[] = { + { .compatible = "img,ir-rev1" }, + {} +}; +MODULE_DEVICE_TABLE(of, img_ir_match); + +static struct platform_driver img_ir_driver = { + .driver = { + .name = "img-ir", + .owner = THIS_MODULE, + .of_match_table = img_ir_match, + .pm = &img_ir_pmops, + }, + .probe = img_ir_probe, + .remove = img_ir_remove, +}; + +module_platform_driver(img_ir_driver); + +MODULE_AUTHOR("Imagination Technologies Ltd."); +MODULE_DESCRIPTION("ImgTec IR"); +MODULE_LICENSE("GPL"); |