arch/arm/mach-omap2/usb-musb.c

   1 /*
   2  * linux/arch/arm/mach-omap2/usb-musb.c
   3  *
   4  * This file will contain the board specific details for the
   5  * MENTOR USB OTG controller on OMAP3430
   6  *
   7  * Copyright (C) 2007-2008 Texas Instruments
   8  * Copyright (C) 2008 Nokia Corporation
   9  * Author: Vikram Pandita
  10  *
  11  * Generalization by:
  12  * Felipe Balbi <felipe.balbi@nokia.com>
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License version 2 as
  16  * published by the Free Software Foundation.
  17  */
  18
  19 #include <linux/types.h>
  20 #include <linux/errno.h>
  21 #include <linux/delay.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/clk.h>
  24 #include <linux/dma-mapping.h>
  25 #include <linux/io.h>
  26
  27 #include <linux/usb/musb.h>
  28
  29 #include <mach/hardware.h>
  30 #include <mach/irqs.h>
  31 #include <mach/am35xx.h>
  32 #include <plat/usb.h>
  33
  34 #if defined(CONFIG_USB_MUSB_OMAP2PLUS) || defined (CONFIG_USB_MUSB_AM35X)
  35
  36 static struct resource musb_resources[] = {
  37         [0] = { /* start and end set dynamically */
  38                 .flags  = IORESOURCE_MEM,
  39         },
  40         [1] = { /* general IRQ */
  41                 .start  = INT_243X_HS_USB_MC,
  42                 .flags  = IORESOURCE_IRQ,
  43                 .name   = "mc",
  44         },
  45         [2] = { /* DMA IRQ */
  46                 .start  = INT_243X_HS_USB_DMA,
  47                 .flags  = IORESOURCE_IRQ,
  48                 .name   = "dma",
  49         },
  50 };
  51
  52 static struct musb_hdrc_config musb_config = {
  53         .multipoint     = 1,
  54         .dyn_fifo       = 1,
  55         .num_eps        = 16,
  56         .ram_bits       = 12,
  57 };
  58
  59 static struct musb_hdrc_platform_data musb_plat = {
  60 #ifdef CONFIG_USB_MUSB_OTG
  61         .mode           = MUSB_OTG,
  62 #elif defined(CONFIG_USB_MUSB_HDRC_HCD)
  63         .mode           = MUSB_HOST,
  64 #elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
  65         .mode           = MUSB_PERIPHERAL,
  66 #endif
  67         /* .clock is set dynamically */
  68         .config         = &musb_config,
  69
  70         /* REVISIT charge pump on TWL4030 can supply up to
  71          * 100 mA ... but this value is board-specific, like
  72          * "mode", and should be passed to usb_musb_init().
  73          */
  74         .power          = 50,                   /* up to 100 mA */
  75 };
  76
  77 static u64 musb_dmamask = DMA_BIT_MASK(32);
  78
  79 static struct platform_device musb_device = {
  80         .name           = "musb-omap2430",
  81         .id             = -1,
  82         .dev = {
  83                 .dma_mask               = &musb_dmamask,
  84                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  85                 .platform_data          = &musb_plat,
  86         },
  87         .num_resources  = ARRAY_SIZE(musb_resources),
  88         .resource       = musb_resources,
  89 };
  90
  91 void __init usb_musb_init(struct omap_musb_board_data *board_data)
  92 {
  93         if (cpu_is_omap243x()) {
  94                 musb_resources[0].start = OMAP243X_HS_BASE;
  95         } else if (cpu_is_omap3517() || cpu_is_omap3505()) {
  96                 musb_resources[0].start = AM35XX_IPSS_USBOTGSS_BASE;
  97                 musb_resources[1].start = INT_35XX_USBOTG_IRQ;
  98         } else if (cpu_is_omap34xx()) {
  99                 musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE;
 100         } else if (cpu_is_omap44xx()) {
 101                 musb_resources[0].start = OMAP44XX_HSUSB_OTG_BASE;
 102                 musb_resources[1].start = OMAP44XX_IRQ_HS_USB_MC_N;
 103                 musb_resources[2].start = OMAP44XX_IRQ_HS_USB_DMA_N;
 104         }
 105         musb_resources[0].end = musb_resources[0].start + SZ_4K - 1;
 106
 107         /*
 108          * REVISIT: This line can be removed once all the platforms using
 109          * musb_core.c have been converted to use use clkdev.
 110          */
 111         musb_plat.clock = "ick";
 112         musb_plat.board_data = board_data;
 113         musb_plat.power = board_data->power >> 1;
 114         musb_plat.mode = board_data->mode;
 115         musb_plat.extvbus = board_data->extvbus;
 116
 117         if (platform_device_register(&musb_device) < 0)
 118                 printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n");
 119 }
 120
 121 #else
 122 void __init usb_musb_init(struct omap_musb_board_data *board_data)
 123 {
 124 }
 125 #endif /* CONFIG_USB_MUSB_SOC */