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/mux.h>
  32 #include <mach/usb.h>
  33
  34 static struct resource musb_resources[] = {
  35         [0] = { /* start and end set dynamically */
  36                 .flags  = IORESOURCE_MEM,
  37         },
  38         [1] = { /* general IRQ */
  39                 .start  = INT_243X_HS_USB_MC,
  40                 .flags  = IORESOURCE_IRQ,
  41         },
  42         [2] = { /* DMA IRQ */
  43                 .start  = INT_243X_HS_USB_DMA,
  44                 .flags  = IORESOURCE_IRQ,
  45         },
  46 };
  47
  48 static int clk_on;
  49
  50 static int musb_set_clock(struct clk *clk, int state)
  51 {
  52         if (state) {
  53                 if (clk_on > 0)
  54                         return -ENODEV;
  55
  56                 clk_enable(clk);
  57                 clk_on = 1;
  58         } else {
  59                 if (clk_on == 0)
  60                         return -ENODEV;
  61
  62                 clk_disable(clk);
  63                 clk_on = 0;
  64         }
  65
  66         return 0;
  67 }
  68
  69 static struct musb_hdrc_eps_bits musb_eps[] = {
  70         {       "ep1_tx", 10,   },
  71         {       "ep1_rx", 10,   },
  72         {       "ep2_tx", 9,    },
  73         {       "ep2_rx", 9,    },
  74         {       "ep3_tx", 3,    },
  75         {       "ep3_rx", 3,    },
  76         {       "ep4_tx", 3,    },
  77         {       "ep4_rx", 3,    },
  78         {       "ep5_tx", 3,    },
  79         {       "ep5_rx", 3,    },
  80         {       "ep6_tx", 3,    },
  81         {       "ep6_rx", 3,    },
  82         {       "ep7_tx", 3,    },
  83         {       "ep7_rx", 3,    },
  84         {       "ep8_tx", 2,    },
  85         {       "ep8_rx", 2,    },
  86         {       "ep9_tx", 2,    },
  87         {       "ep9_rx", 2,    },
  88         {       "ep10_tx", 2,   },
  89         {       "ep10_rx", 2,   },
  90         {       "ep11_tx", 2,   },
  91         {       "ep11_rx", 2,   },
  92         {       "ep12_tx", 2,   },
  93         {       "ep12_rx", 2,   },
  94         {       "ep13_tx", 2,   },
  95         {       "ep13_rx", 2,   },
  96         {       "ep14_tx", 2,   },
  97         {       "ep14_rx", 2,   },
  98         {       "ep15_tx", 2,   },
  99         {       "ep15_rx", 2,   },
 100 };
 101
 102 static struct musb_hdrc_config musb_config = {
 103         .multipoint     = 1,
 104         .dyn_fifo       = 1,
 105         .soft_con       = 1,
 106         .dma            = 1,
 107         .num_eps        = 16,
 108         .dma_channels   = 7,
 109         .dma_req_chan   = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3),
 110         .ram_bits       = 12,
 111         .eps_bits       = musb_eps,
 112 };
 113
 114 static struct musb_hdrc_platform_data musb_plat = {
 115 #ifdef CONFIG_USB_MUSB_OTG
 116         .mode           = MUSB_OTG,
 117 #elif defined(CONFIG_USB_MUSB_HDRC_HCD)
 118         .mode           = MUSB_HOST,
 119 #elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
 120         .mode           = MUSB_PERIPHERAL,
 121 #endif
 122         /* .clock is set dynamically */
 123         .set_clock      = musb_set_clock,
 124         .config         = &musb_config,
 125
 126         /* REVISIT charge pump on TWL4030 can supply up to
 127          * 100 mA ... but this value is board-specific, like
 128          * "mode", and should be passed to usb_musb_init().
 129          */
 130         .power          = 50,                   /* up to 100 mA */
 131 };
 132
 133 static u64 musb_dmamask = DMA_BIT_MASK(32);
 134
 135 static struct platform_device musb_device = {
 136         .name           = "musb_hdrc",
 137         .id             = -1,
 138         .dev = {
 139                 .dma_mask               = &musb_dmamask,
 140                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 141                 .platform_data          = &musb_plat,
 142         },
 143         .num_resources  = ARRAY_SIZE(musb_resources),
 144         .resource       = musb_resources,
 145 };
 146
 147 #ifdef CONFIG_NOP_USB_XCEIV
 148 static u64 nop_xceiv_dmamask = DMA_BIT_MASK(32);
 149
 150 static struct platform_device nop_xceiv_device = {
 151         .name           = "nop_usb_xceiv",
 152         .id             = -1,
 153         .dev = {
 154                 .dma_mask               = &nop_xceiv_dmamask,
 155                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 156                 .platform_data          = NULL,
 157         },
 158 };
 159 #endif
 160
 161 void __init usb_musb_init(void)
 162 {
 163         if (cpu_is_omap243x())
 164                 musb_resources[0].start = OMAP243X_HS_BASE;
 165         else
 166                 musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE;
 167         musb_resources[0].end = musb_resources[0].start + SZ_8K - 1;
 168
 169         /*
 170          * REVISIT: This line can be removed once all the platforms using
 171          * musb_core.c have been converted to use use clkdev.
 172          */
 173         musb_plat.clock = "ick";
 174
 175 #ifdef CONFIG_NOP_USB_XCEIV
 176         if (platform_device_register(&nop_xceiv_device) < 0) {
 177                 printk(KERN_ERR "Unable to register NOP-XCEIV device\n");
 178                 return;
 179         }
 180 #endif
 181
 182         if (platform_device_register(&musb_device) < 0) {
 183                 printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n");
 184                 return;
 185         }
 186 }