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 #include "mux.h"
  34
  35 #if defined(CONFIG_USB_MUSB_OMAP2PLUS) || defined (CONFIG_USB_MUSB_AM35X)
  36
  37 static struct resource musb_resources[] = {
  38         [0] = { /* start and end set dynamically */
  39                 .flags  = IORESOURCE_MEM,
  40         },
  41         [1] = { /* general IRQ */
  42                 .start  = INT_243X_HS_USB_MC,
  43                 .flags  = IORESOURCE_IRQ,
  44                 .name   = "mc",
  45         },
  46         [2] = { /* DMA IRQ */
  47                 .start  = INT_243X_HS_USB_DMA,
  48                 .flags  = IORESOURCE_IRQ,
  49                 .name   = "dma",
  50         },
  51 };
  52
  53 static struct musb_hdrc_config musb_config = {
  54         .multipoint     = 1,
  55         .dyn_fifo       = 1,
  56         .num_eps        = 16,
  57         .ram_bits       = 12,
  58 };
  59
  60 static struct musb_hdrc_platform_data musb_plat = {
  61 #ifdef CONFIG_USB_MUSB_OTG
  62         .mode           = MUSB_OTG,
  63 #elif defined(CONFIG_USB_MUSB_HDRC_HCD)
  64         .mode           = MUSB_HOST,
  65 #elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
  66         .mode           = MUSB_PERIPHERAL,
  67 #endif
  68         /* .clock is set dynamically */
  69         .config         = &musb_config,
  70
  71         /* REVISIT charge pump on TWL4030 can supply up to
  72          * 100 mA ... but this value is board-specific, like
  73          * "mode", and should be passed to usb_musb_init().
  74          */
  75         .power          = 50,                   /* up to 100 mA */
  76 };
  77
  78 static u64 musb_dmamask = DMA_BIT_MASK(32);
  79
  80 static struct platform_device musb_device = {
  81         .name           = "musb-omap2430",
  82         .id             = -1,
  83         .dev = {
  84                 .dma_mask               = &musb_dmamask,
  85                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  86                 .platform_data          = &musb_plat,
  87         },
  88         .num_resources  = ARRAY_SIZE(musb_resources),
  89         .resource       = musb_resources,
  90 };
  91
  92 static void usb_musb_mux_init(struct omap_musb_board_data *board_data)
  93 {
  94         switch (board_data->interface_type) {
  95         case MUSB_INTERFACE_UTMI:
  96                 omap_mux_init_signal("usba0_otg_dp", OMAP_PIN_INPUT);
  97                 omap_mux_init_signal("usba0_otg_dm", OMAP_PIN_INPUT);
  98                 break;
  99         case MUSB_INTERFACE_ULPI:
 100                 omap_mux_init_signal("usba0_ulpiphy_clk",
 101                                                 OMAP_PIN_INPUT_PULLDOWN);
 102                 omap_mux_init_signal("usba0_ulpiphy_stp",
 103                                                 OMAP_PIN_INPUT_PULLDOWN);
 104                 omap_mux_init_signal("usba0_ulpiphy_dir",
 105                                                 OMAP_PIN_INPUT_PULLDOWN);
 106                 omap_mux_init_signal("usba0_ulpiphy_nxt",
 107                                                 OMAP_PIN_INPUT_PULLDOWN);
 108                 omap_mux_init_signal("usba0_ulpiphy_dat0",
 109                                                 OMAP_PIN_INPUT_PULLDOWN);
 110                 omap_mux_init_signal("usba0_ulpiphy_dat1",
 111                                                 OMAP_PIN_INPUT_PULLDOWN);
 112                 omap_mux_init_signal("usba0_ulpiphy_dat2",
 113                                                 OMAP_PIN_INPUT_PULLDOWN);
 114                 omap_mux_init_signal("usba0_ulpiphy_dat3",
 115                                                 OMAP_PIN_INPUT_PULLDOWN);
 116                 omap_mux_init_signal("usba0_ulpiphy_dat4",
 117                                                 OMAP_PIN_INPUT_PULLDOWN);
 118                 omap_mux_init_signal("usba0_ulpiphy_dat5",
 119                                                 OMAP_PIN_INPUT_PULLDOWN);
 120                 omap_mux_init_signal("usba0_ulpiphy_dat6",
 121                                                 OMAP_PIN_INPUT_PULLDOWN);
 122                 omap_mux_init_signal("usba0_ulpiphy_dat7",
 123                                                 OMAP_PIN_INPUT_PULLDOWN);
 124                 break;
 125         default:
 126                 break;
 127         }
 128 }
 129 void __init usb_musb_init(struct omap_musb_board_data *board_data)
 130 {
 131         if (cpu_is_omap243x()) {
 132                 musb_resources[0].start = OMAP243X_HS_BASE;
 133         } else if (cpu_is_omap3517() || cpu_is_omap3505()) {
 134                 musb_device.name = "musb-am35x";
 135                 musb_resources[0].start = AM35XX_IPSS_USBOTGSS_BASE;
 136                 musb_resources[1].start = INT_35XX_USBOTG_IRQ;
 137         } else if (cpu_is_omap34xx()) {
 138                 musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE;
 139         } else if (cpu_is_omap44xx()) {
 140                 musb_resources[0].start = OMAP44XX_HSUSB_OTG_BASE;
 141                 musb_resources[1].start = OMAP44XX_IRQ_HS_USB_MC_N;
 142                 musb_resources[2].start = OMAP44XX_IRQ_HS_USB_DMA_N;
 143
 144                 usb_musb_mux_init(board_data);
 145         }
 146         musb_resources[0].end = musb_resources[0].start + SZ_4K - 1;
 147
 148         /*
 149          * REVISIT: This line can be removed once all the platforms using
 150          * musb_core.c have been converted to use use clkdev.
 151          */
 152         musb_plat.clock = "ick";
 153         musb_plat.board_data = board_data;
 154         musb_plat.power = board_data->power >> 1;
 155         musb_plat.mode = board_data->mode;
 156         musb_plat.extvbus = board_data->extvbus;
 157
 158         if (platform_device_register(&musb_device) < 0)
 159                 printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n");
 160 }
 161
 162 #else
 163 void __init usb_musb_init(struct omap_musb_board_data *board_data)
 164 {
 165 }
 166 #endif /* CONFIG_USB_MUSB_SOC */