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| author | Alexandre Bailon <abailon@baylibre.com> | 2017-04-16 23:21:17 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-18 16:48:26 +0200 |
| commit | d6299b6efbf66c27d2d8cda009e6d49b53dc4cfe (patch) | |
| tree | f7d15b0c9a9314a504c7c8c3b74d4958d3f0d972 /drivers/usb/musb | |
| parent | aa2fb8862522690ffd7cfc42a3643d4b08ee4b46 (diff) | |
| download | linux-d6299b6efbf66c27d2d8cda009e6d49b53dc4cfe.tar.gz linux-d6299b6efbf66c27d2d8cda009e6d49b53dc4cfe.tar.xz | |
usb: musb: Add support of CPPI 4.1 DMA controller to DA8xx
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>
Diffstat (limited to 'drivers/usb/musb')
| -rw-r--r-- | drivers/usb/musb/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/usb/musb/da8xx.c | 43 |
2 files changed, 44 insertions, 3 deletions
diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig index 72a2a5040848..5506a9c03c1f 100644 --- a/drivers/usb/musb/Kconfig +++ b/drivers/usb/musb/Kconfig @@ -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 diff --git a/drivers/usb/musb/da8xx.c b/drivers/usb/musb/da8xx.c index d79c288ccbf2..7b9a44dc1188 100644 --- a/drivers/usb/musb/da8xx.c +++ b/drivers/usb/musb/da8xx.c @@ -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)); |