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 <plat/omap_device.h>
  34 #include "mux.h"
  35
  36 #if defined(CONFIG_USB_MUSB_OMAP2PLUS) || defined (CONFIG_USB_MUSB_AM35X)
  37
  38 static struct musb_hdrc_config musb_config = {
  39         .multipoint     = 1,
  40         .dyn_fifo       = 1,
  41         .num_eps        = 16,
  42         .ram_bits       = 12,
  43 };
  44
  45 static struct musb_hdrc_platform_data musb_plat = {
  46 #ifdef CONFIG_USB_MUSB_OTG
  47         .mode           = MUSB_OTG,
  48 #elif defined(CONFIG_USB_MUSB_HDRC_HCD)
  49         .mode           = MUSB_HOST,
  50 #elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
  51         .mode           = MUSB_PERIPHERAL,
  52 #endif
  53         /* .clock is set dynamically */
  54         .config         = &musb_config,
  55
  56         /* REVISIT charge pump on TWL4030 can supply up to
  57          * 100 mA ... but this value is board-specific, like
  58          * "mode", and should be passed to usb_musb_init().
  59          */
  60         .power          = 50,                   /* up to 100 mA */
  61 };
  62
  63 static u64 musb_dmamask = DMA_BIT_MASK(32);
  64
  65 static struct omap_device_pm_latency omap_musb_latency[] = {
  66         {
  67                 .deactivate_func        = omap_device_idle_hwmods,
  68                 .activate_func          = omap_device_enable_hwmods,
  69                 .flags                  = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
  70         },
  71 };
  72
  73 static void usb_musb_mux_init(struct omap_musb_board_data *board_data)
  74 {
  75         switch (board_data->interface_type) {
  76         case MUSB_INTERFACE_UTMI:
  77                 omap_mux_init_signal("usba0_otg_dp", OMAP_PIN_INPUT);
  78                 omap_mux_init_signal("usba0_otg_dm", OMAP_PIN_INPUT);
  79                 break;
  80         case MUSB_INTERFACE_ULPI:
  81                 omap_mux_init_signal("usba0_ulpiphy_clk",
  82                                                 OMAP_PIN_INPUT_PULLDOWN);
  83                 omap_mux_init_signal("usba0_ulpiphy_stp",
  84                                                 OMAP_PIN_INPUT_PULLDOWN);
  85                 omap_mux_init_signal("usba0_ulpiphy_dir",
  86                                                 OMAP_PIN_INPUT_PULLDOWN);
  87                 omap_mux_init_signal("usba0_ulpiphy_nxt",
  88                                                 OMAP_PIN_INPUT_PULLDOWN);
  89                 omap_mux_init_signal("usba0_ulpiphy_dat0",
  90                                                 OMAP_PIN_INPUT_PULLDOWN);
  91                 omap_mux_init_signal("usba0_ulpiphy_dat1",
  92                                                 OMAP_PIN_INPUT_PULLDOWN);
  93                 omap_mux_init_signal("usba0_ulpiphy_dat2",
  94                                                 OMAP_PIN_INPUT_PULLDOWN);
  95                 omap_mux_init_signal("usba0_ulpiphy_dat3",
  96                                                 OMAP_PIN_INPUT_PULLDOWN);
  97                 omap_mux_init_signal("usba0_ulpiphy_dat4",
  98                                                 OMAP_PIN_INPUT_PULLDOWN);
  99                 omap_mux_init_signal("usba0_ulpiphy_dat5",
 100                                                 OMAP_PIN_INPUT_PULLDOWN);
 101                 omap_mux_init_signal("usba0_ulpiphy_dat6",
 102                                                 OMAP_PIN_INPUT_PULLDOWN);
 103                 omap_mux_init_signal("usba0_ulpiphy_dat7",
 104                                                 OMAP_PIN_INPUT_PULLDOWN);
 105                 break;
 106         default:
 107                 break;
 108         }
 109 }
 110
 111 static struct omap_musb_board_data musb_default_board_data = {
 112         .interface_type         = MUSB_INTERFACE_ULPI,
 113         .mode                   = MUSB_OTG,
 114         .power                  = 100,
 115 };
 116
 117 void __init usb_musb_init(struct omap_musb_board_data *musb_board_data)
 118 {
 119         struct omap_hwmod               *oh;
 120         struct omap_device              *od;
 121         struct platform_device          *pdev;
 122         struct device                   *dev;
 123         int                             bus_id = -1;
 124         const char                      *oh_name, *name;
 125         struct omap_musb_board_data     *board_data;
 126
 127         if (musb_board_data)
 128                 board_data = musb_board_data;
 129         else
 130                 board_data = &musb_default_board_data;
 131
 132         if (cpu_is_omap3517() || cpu_is_omap3505()) {
 133         } else if (cpu_is_omap44xx()) {
 134                 usb_musb_mux_init(board_data);
 135         }
 136
 137         /*
 138          * REVISIT: This line can be removed once all the platforms using
 139          * musb_core.c have been converted to use use clkdev.
 140          */
 141         musb_plat.clock = "ick";
 142         musb_plat.board_data = board_data;
 143         musb_plat.power = board_data->power >> 1;
 144         musb_plat.mode = board_data->mode;
 145         musb_plat.extvbus = board_data->extvbus;
 146
 147         if (cpu_is_omap44xx())
 148                 omap4430_phy_init(dev);
 149
 150         if (cpu_is_omap3517() || cpu_is_omap3505()) {
 151                 oh_name = "am35x_otg_hs";
 152                 name = "musb-am35x";
 153         } else {
 154                 oh_name = "usb_otg_hs";
 155                 name = "musb-omap2430";
 156         }
 157
 158         oh = omap_hwmod_lookup(oh_name);
 159         if (!oh) {
 160                 pr_err("Could not look up %s\n", oh_name);
 161                 return;
 162         }
 163
 164         od = omap_device_build(name, bus_id, oh, &musb_plat,
 165                                sizeof(musb_plat), omap_musb_latency,
 166                                ARRAY_SIZE(omap_musb_latency), false);
 167         if (IS_ERR(od)) {
 168                 pr_err("Could not build omap_device for %s %s\n",
 169                                                 name, oh_name);
 170                 return;
 171         }
 172
 173         pdev = &od->pdev;
 174         dev = &pdev->dev;
 175         get_device(dev);
 176         dev->dma_mask = &musb_dmamask;
 177         dev->coherent_dma_mask = musb_dmamask;
 178         put_device(dev);
 179 }
 180
 181 #else
 182 void __init usb_musb_init(struct omap_musb_board_data *board_data)
 183 {
 184 }
 185 #endif /* CONFIG_USB_MUSB_SOC */