redonkable/remarkable-linux
redonkable/remarkable-linux
1
0
Fork 0
Code Releases Activity

usb: musb: Add support of CPPI 4.1 DMA controller to DA8xx

Browse source 
Currently, only the PIO mode is supported.
This add support of CPPI 4.1 to DA8xx.
As in DA8xx the CPPI 4.1 DMA is a part of the USBSS, create the CPPI 4.1
device as a child of USB.

Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
[b-liu@ti.com: minor tweak in the commit log]
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexandre Bailon 2017-04-16 23:21:17 -05:00 committed by Greg Kroah-Hartman
parent aa2fb88625
commit d6299b6efb
2 changed files with 44 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/usb/musb/Kconfig
View file

@ -160,8 +160,8 @@ config USB_TI_CPPI_DMA
Enable DMA transfers when TI CPPI DMA is available.
config USB_TI_CPPI41_DMA
bool 'TI CPPI 4.1 (AM335x)'
depends on ARCH_OMAP && DMADEVICES
bool 'TI CPPI 4.1'
depends on (ARCH_OMAP || ARCH_DAVINCI_DA8XX) && DMADEVICES
select TI_CPPI41
config USB_TUSB_OMAP_DMA

43
drivers/usb/musb/da8xx.c
View file

@ -33,6 +33,7 @@
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/of_platform.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
@ -456,12 +457,41 @@ static inline u8 get_vbus_power(struct device *dev)
return current_uA / 1000 / 2;
}
#ifdef CONFIG_USB_TI_CPPI41_DMA
static void da8xx_dma_controller_callback(struct dma_controller *c)
{
struct musb *musb = c->musb;
void __iomem *reg_base = musb->ctrl_base;
musb_writel(reg_base, DA8XX_USB_END_OF_INTR_REG, 0);
}
static struct dma_controller *
da8xx_dma_controller_create(struct musb *musb, void __iomem *base)
{
struct dma_controller *controller;
controller = cppi41_dma_controller_create(musb, base);
if (IS_ERR_OR_NULL(controller))
return controller;
controller->dma_callback = da8xx_dma_controller_callback;
return controller;
}
#endif
static const struct musb_platform_ops da8xx_ops = {
.quirks = MUSB_INDEXED_EP | MUSB_PRESERVE_SESSION,
.quirks = MUSB_INDEXED_EP | MUSB_PRESERVE_SESSION |
MUSB_DMA_CPPI41,
.init = da8xx_musb_init,
.exit = da8xx_musb_exit,
.fifo_mode = 2,
#ifdef CONFIG_USB_TI_CPPI41_DMA
.dma_init = da8xx_dma_controller_create,
.dma_exit = cppi41_dma_controller_destroy,
#endif
.enable = da8xx_musb_enable,
.disable = da8xx_musb_disable,
@ -483,6 +513,12 @@ static const struct musb_hdrc_config da8xx_config = {
.multipoint = 1,
};
static struct of_dev_auxdata da8xx_auxdata_lookup[] __initdata = {
OF_DEV_AUXDATA("ti,da830-cppi41", 0x01e01000, "cppi41-dmaengine",
NULL),
{}
};
static int da8xx_probe(struct platform_device *pdev)
{
struct resource musb_resources[2];
@ -533,6 +569,11 @@ static int da8xx_probe(struct platform_device *pdev)
}
platform_set_drvdata(pdev, glue);
ret = of_platform_populate(pdev->dev.of_node, NULL,
da8xx_auxdata_lookup, &pdev->dev);
if (ret)
return ret;
memset(musb_resources, 0x00, sizeof(*musb_resources) *
ARRAY_SIZE(musb_resources));