arm/mach-davinci/usb.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * USB
0004  */
0005 #include <linux/dma-mapping.h>
0006 #include <linux/init.h>
0007 #include <linux/platform_device.h>
0008 #include <linux/platform_data/usb-davinci.h>
0009 #include <linux/usb/musb.h>
0010
0011 #include "common.h"
0012 #include "cputype.h"
0013 #include "irqs.h"
0014
0015 #define DAVINCI_USB_OTG_BASE    0x01c64000
0016
0017 #if IS_ENABLED(CONFIG_USB_MUSB_HDRC)
0018 static struct musb_hdrc_config musb_config = {
0019     .multipoint = true,
0020
0021     .num_eps    = 5,
0022     .ram_bits   = 10,
0023 };
0024
0025 static struct musb_hdrc_platform_data usb_data = {
0026     /* OTG requires a Mini-AB connector */
0027     .mode           = MUSB_OTG,
0028     .clock      = "usb",
0029     .config     = &musb_config,
0030 };
0031
0032 static struct resource usb_resources[] = {
0033     {
0034         /* physical address */
0035         .start          = DAVINCI_USB_OTG_BASE,
0036         .end            = DAVINCI_USB_OTG_BASE + 0x5ff,
0037         .flags          = IORESOURCE_MEM,
0038     },
0039     {
0040         .start          = DAVINCI_INTC_IRQ(IRQ_USBINT),
0041         .flags          = IORESOURCE_IRQ,
0042         .name       = "mc"
0043     },
0044     {
0045         /* placeholder for the dedicated CPPI IRQ */
0046         .flags          = IORESOURCE_IRQ,
0047         .name       = "dma"
0048     },
0049 };
0050
0051 static u64 usb_dmamask = DMA_BIT_MASK(32);
0052
0053 static struct platform_device usb_dev = {
0054     .name           = "musb-davinci",
0055     .id             = -1,
0056     .dev = {
0057         .platform_data      = &usb_data,
0058         .dma_mask       = &usb_dmamask,
0059         .coherent_dma_mask      = DMA_BIT_MASK(32),
0060     },
0061     .resource       = usb_resources,
0062     .num_resources  = ARRAY_SIZE(usb_resources),
0063 };
0064
0065 void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
0066 {
0067     usb_data.power = mA > 510 ? 255 : mA / 2;
0068     usb_data.potpgt = (potpgt_ms + 1) / 2;
0069
0070     if (cpu_is_davinci_dm646x()) {
0071         /* Override the defaults as DM6467 uses different IRQs. */
0072         usb_dev.resource[1].start = DAVINCI_INTC_IRQ(IRQ_DM646X_USBINT);
0073         usb_dev.resource[2].start = DAVINCI_INTC_IRQ(
0074                             IRQ_DM646X_USBDMAINT);
0075     } else  /* other devices don't have dedicated CPPI IRQ */
0076         usb_dev.num_resources = 2;
0077
0078     platform_device_register(&usb_dev);
0079 }
0080
0081 #else
0082
0083 void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
0084 {
0085 }
0086
0087 #endif  /* CONFIG_USB_MUSB_HDRC */