xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

misc: mic: add dma support in card driver

Browse Source 
This patch adds a dma device on the mic virtual bus

Reviewed-by: Nikhil Rao <nikhil.rao@intel.com>
Signed-off-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Siva Yerramreddy <yshivakrishna@gmail.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Siva Yerramreddy
2014-07-11 14:04:25 -07:00
committed by Greg Kroah-Hartman
parent 9c3d37c7a1
commit a93a5244ed
3 changed files with 61 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

55
drivers/misc/mic/card/mic_x100.c
View File

@@ -148,6 +148,47 @@ void mic_card_unmap(struct mic_device *mdev, void __iomem *addr)
iounmap(addr);
}
static inline struct mic_driver *mbdev_to_mdrv(struct mbus_device *mbdev)
{
return dev_get_drvdata(mbdev->dev.parent);
}
static struct mic_irq *
_mic_request_threaded_irq(struct mbus_device *mbdev,
irq_handler_t handler, irq_handler_t thread_fn,
const char *name, void *data, int intr_src)
{
int rc = 0;
unsigned int irq = intr_src;
unsigned long cookie = irq;
rc = request_threaded_irq(irq, handler, thread_fn, 0, name, data);
if (rc) {
dev_err(mbdev_to_mdrv(mbdev)->dev,
"request_threaded_irq failed rc = %d\n", rc);
return ERR_PTR(rc);
}
return (struct mic_irq *)cookie;
}
static void _mic_free_irq(struct mbus_device *mbdev,
struct mic_irq *cookie, void *data)
{
unsigned long irq = (unsigned long)cookie;
free_irq(irq, data);
}
static void _mic_ack_interrupt(struct mbus_device *mbdev, int num)
{
mic_ack_interrupt(&mbdev_to_mdrv(mbdev)->mdev);
}
static struct mbus_hw_ops mbus_hw_ops = {
.request_threaded_irq = _mic_request_threaded_irq,
.free_irq = _mic_free_irq,
.ack_interrupt = _mic_ack_interrupt,
};
static int __init mic_probe(struct platform_device *pdev)
{
struct mic_driver *mdrv = &g_drv;
@@ -166,13 +207,24 @@ static int __init mic_probe(struct platform_device *pdev)
goto done;
}
mic_hw_intr_init(mdrv);
platform_set_drvdata(pdev, mdrv);
mdrv->dma_mbdev = mbus_register_device(mdrv->dev, MBUS_DEV_DMA_MIC,
NULL, &mbus_hw_ops,
mdrv->mdev.mmio.va);
if (IS_ERR(mdrv->dma_mbdev)) {
rc = PTR_ERR(mdrv->dma_mbdev);
dev_err(&pdev->dev, "mbus_add_device failed rc %d\n", rc);
goto iounmap;
}
rc = mic_driver_init(mdrv);
if (rc) {
dev_err(&pdev->dev, "mic_driver_init failed rc %d\n", rc);
goto iounmap;
goto remove_dma;
}
done:
return rc;
remove_dma:
mbus_unregister_device(mdrv->dma_mbdev);
iounmap:
iounmap(mdev->mmio.va);
return rc;
@@ -184,6 +236,7 @@ static int mic_remove(struct platform_device *pdev)
struct mic_device *mdev = &mdrv->mdev;
mic_driver_uninit(mdrv);
mbus_unregister_device(mdrv->dma_mbdev);
iounmap(mdev->mmio.va);
return 0;
}