diff options
Diffstat (limited to 'arch/arm/mach-davinci/usb.c')
-rw-r--r-- | arch/arm/mach-davinci/usb.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/usb.c b/arch/arm/mach-davinci/usb.c new file mode 100644 index 000000000..a9e5c6e91 --- /dev/null +++ b/arch/arm/mach-davinci/usb.c @@ -0,0 +1,87 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * USB + */ +#include <linux/dma-mapping.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/platform_data/usb-davinci.h> +#include <linux/usb/musb.h> + +#include "common.h" +#include "cputype.h" +#include "irqs.h" + +#define DAVINCI_USB_OTG_BASE 0x01c64000 + +#if IS_ENABLED(CONFIG_USB_MUSB_HDRC) +static struct musb_hdrc_config musb_config = { + .multipoint = true, + + .num_eps = 5, + .ram_bits = 10, +}; + +static struct musb_hdrc_platform_data usb_data = { + /* OTG requires a Mini-AB connector */ + .mode = MUSB_OTG, + .clock = "usb", + .config = &musb_config, +}; + +static struct resource usb_resources[] = { + { + /* physical address */ + .start = DAVINCI_USB_OTG_BASE, + .end = DAVINCI_USB_OTG_BASE + 0x5ff, + .flags = IORESOURCE_MEM, + }, + { + .start = DAVINCI_INTC_IRQ(IRQ_USBINT), + .flags = IORESOURCE_IRQ, + .name = "mc" + }, + { + /* placeholder for the dedicated CPPI IRQ */ + .flags = IORESOURCE_IRQ, + .name = "dma" + }, +}; + +static u64 usb_dmamask = DMA_BIT_MASK(32); + +static struct platform_device usb_dev = { + .name = "musb-davinci", + .id = -1, + .dev = { + .platform_data = &usb_data, + .dma_mask = &usb_dmamask, + .coherent_dma_mask = DMA_BIT_MASK(32), + }, + .resource = usb_resources, + .num_resources = ARRAY_SIZE(usb_resources), +}; + +void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms) +{ + usb_data.power = mA > 510 ? 255 : mA / 2; + usb_data.potpgt = (potpgt_ms + 1) / 2; + + if (cpu_is_davinci_dm646x()) { + /* Override the defaults as DM6467 uses different IRQs. */ + usb_dev.resource[1].start = DAVINCI_INTC_IRQ(IRQ_DM646X_USBINT); + usb_dev.resource[2].start = DAVINCI_INTC_IRQ( + IRQ_DM646X_USBDMAINT); + } else /* other devices don't have dedicated CPPI IRQ */ + usb_dev.num_resources = 2; + + platform_device_register(&usb_dev); +} + +#else + +void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms) +{ +} + +#endif /* CONFIG_USB_MUSB_HDRC */ |