diff options
Diffstat (limited to 'kernel/arch/arm/mach-davinci/usb.c')
| -rw-r--r-- | kernel/arch/arm/mach-davinci/usb.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-davinci/usb.c b/kernel/arch/arm/mach-davinci/usb.c new file mode 100644 index 000000000..b0a6b5225 --- /dev/null +++ b/kernel/arch/arm/mach-davinci/usb.c @@ -0,0 +1,175 @@ +/* + * USB + */ +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/dma-mapping.h> + +#include <linux/usb/musb.h> + +#include <mach/common.h> +#include <mach/irqs.h> +#include <mach/cputype.h> +#include <mach/da8xx.h> +#include <linux/platform_data/usb-davinci.h> + +#define DAVINCI_USB_OTG_BASE 0x01c64000 + +#define DA8XX_USB0_BASE 0x01e00000 +#define DA8XX_USB1_BASE 0x01e25000 + +#if IS_ENABLED(CONFIG_USB_MUSB_HDRC) +static struct musb_hdrc_eps_bits musb_eps[] = { + { "ep1_tx", 8, }, + { "ep1_rx", 8, }, + { "ep2_tx", 8, }, + { "ep2_rx", 8, }, + { "ep3_tx", 5, }, + { "ep3_rx", 5, }, + { "ep4_tx", 5, }, + { "ep4_rx", 5, }, +}; + +static struct musb_hdrc_config musb_config = { + .multipoint = true, + .dyn_fifo = true, + .soft_con = true, + .dma = true, + + .num_eps = 5, + .dma_channels = 8, + .ram_bits = 10, + .eps_bits = musb_eps, +}; + +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 = 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 = IRQ_DM646X_USBINT; + usb_dev.resource[2].start = IRQ_DM646X_USBDMAINT; + } else /* other devices don't have dedicated CPPI IRQ */ + usb_dev.num_resources = 2; + + platform_device_register(&usb_dev); +} + +#ifdef CONFIG_ARCH_DAVINCI_DA8XX +static struct resource da8xx_usb20_resources[] = { + { + .start = DA8XX_USB0_BASE, + .end = DA8XX_USB0_BASE + SZ_64K - 1, + .flags = IORESOURCE_MEM, + }, + { + .start = IRQ_DA8XX_USB_INT, + .flags = IORESOURCE_IRQ, + .name = "mc", + }, +}; + +int __init da8xx_register_usb20(unsigned mA, unsigned potpgt) +{ + usb_data.clock = "usb20"; + usb_data.power = mA > 510 ? 255 : mA / 2; + usb_data.potpgt = (potpgt + 1) / 2; + + usb_dev.resource = da8xx_usb20_resources; + usb_dev.num_resources = ARRAY_SIZE(da8xx_usb20_resources); + usb_dev.name = "musb-da8xx"; + + return platform_device_register(&usb_dev); +} +#endif /* CONFIG_DAVINCI_DA8XX */ + +#else + +void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms) +{ +} + +#ifdef CONFIG_ARCH_DAVINCI_DA8XX +int __init da8xx_register_usb20(unsigned mA, unsigned potpgt) +{ + return 0; +} +#endif + +#endif /* CONFIG_USB_MUSB_HDRC */ + +#ifdef CONFIG_ARCH_DAVINCI_DA8XX +static struct resource da8xx_usb11_resources[] = { + [0] = { + .start = DA8XX_USB1_BASE, + .end = DA8XX_USB1_BASE + SZ_4K - 1, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = IRQ_DA8XX_IRQN, + .end = IRQ_DA8XX_IRQN, + .flags = IORESOURCE_IRQ, + }, +}; + +static u64 da8xx_usb11_dma_mask = DMA_BIT_MASK(32); + +static struct platform_device da8xx_usb11_device = { + .name = "ohci", + .id = 0, + .dev = { + .dma_mask = &da8xx_usb11_dma_mask, + .coherent_dma_mask = DMA_BIT_MASK(32), + }, + .num_resources = ARRAY_SIZE(da8xx_usb11_resources), + .resource = da8xx_usb11_resources, +}; + +int __init da8xx_register_usb11(struct da8xx_ohci_root_hub *pdata) +{ + da8xx_usb11_device.dev.platform_data = pdata; + return platform_device_register(&da8xx_usb11_device); +} +#endif /* CONFIG_DAVINCI_DA8XX */ |