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 <asm/io.h>
  25 #include <mach/mux.h>
  26 #include <linux/usb/musb.h>
  27
  28 #include <mach/hardware.h>
  29 #include <mach/pm.h>
  30 #include <mach/usb.h>
  31
  32 #ifdef CONFIG_USB_MUSB_SOC
  33 static struct resource musb_resources[] = {
  34         [0] = {
  35                 .start  = cpu_is_omap34xx()
  36                         ? OMAP34XX_HSUSB_OTG_BASE
  37                         : OMAP243X_HS_BASE,
  38                 .end    = cpu_is_omap34xx()
  39                         ? OMAP34XX_HSUSB_OTG_BASE + SZ_8K - 1
  40                         : OMAP243X_HS_BASE + SZ_8K - 1,
  41                 .flags  = IORESOURCE_MEM,
  42         },
  43         [1] = { /* general IRQ */
  44                 .start  = INT_243X_HS_USB_MC,
  45                 .flags  = IORESOURCE_IRQ,
  46         },
  47         [2] = { /* DMA IRQ */
  48                 .start  = INT_243X_HS_USB_DMA,
  49                 .flags  = IORESOURCE_IRQ,
  50         },
  51 };
  52
  53 static int clk_on;
  54
  55 static int musb_set_clock(struct clk *clk, int state)
  56 {
  57         if (state) {
  58                 if (clk_on > 0)
  59                         return -ENODEV;
  60
  61                 clk_enable(clk);
  62                 clk_on = 1;
  63         } else {
  64                 if (clk_on == 0)
  65                         return -ENODEV;
  66
  67                 clk_disable(clk);
  68                 clk_on = 0;
  69         }
  70
  71         return 0;
  72 }
  73
  74 static struct musb_hdrc_eps_bits musb_eps[] = {
  75         {       "ep1_tx", 10,   },
  76         {       "ep1_rx", 10,   },
  77         {       "ep2_tx", 9,    },
  78         {       "ep2_rx", 9,    },
  79         {       "ep3_tx", 3,    },
  80         {       "ep3_rx", 3,    },
  81         {       "ep4_tx", 3,    },
  82         {       "ep4_rx", 3,    },
  83         {       "ep5_tx", 3,    },
  84         {       "ep5_rx", 3,    },
  85         {       "ep6_tx", 3,    },
  86         {       "ep6_rx", 3,    },
  87         {       "ep7_tx", 3,    },
  88         {       "ep7_rx", 3,    },
  89         {       "ep8_tx", 2,    },
  90         {       "ep8_rx", 2,    },
  91         {       "ep9_tx", 2,    },
  92         {       "ep9_rx", 2,    },
  93         {       "ep10_tx", 2,   },
  94         {       "ep10_rx", 2,   },
  95         {       "ep11_tx", 2,   },
  96         {       "ep11_rx", 2,   },
  97         {       "ep12_tx", 2,   },
  98         {       "ep12_rx", 2,   },
  99         {       "ep13_tx", 2,   },
 100         {       "ep13_rx", 2,   },
 101         {       "ep14_tx", 2,   },
 102         {       "ep14_rx", 2,   },
 103         {       "ep15_tx", 2,   },
 104         {       "ep15_rx", 2,   },
 105 };
 106
 107 static struct musb_hdrc_config musb_config = {
 108         .multipoint     = 1,
 109         .dyn_fifo       = 1,
 110         .soft_con       = 1,
 111         .dma            = 1,
 112         .num_eps        = 32,
 113         .dma_channels   = 7,
 114         .dma_req_chan   = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3),
 115         .ram_bits       = 12,
 116         .eps_bits       = musb_eps,
 117 };
 118
 119 static struct musb_hdrc_platform_data musb_plat = {
 120 #ifdef CONFIG_USB_MUSB_OTG
 121         .mode           = MUSB_OTG,
 122 #elif defined(CONFIG_USB_MUSB_HDRC_HCD)
 123         .mode           = MUSB_HOST,
 124 #elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
 125         .mode           = MUSB_PERIPHERAL,
 126 #endif
 127         .clock          = cpu_is_omap34xx()
 128                         ? "hsotgusb_ick"
 129                         : "usbhs_ick",
 130         .set_clock      = musb_set_clock,
 131         .config         = &musb_config,
 132 };
 133
 134 static u64 musb_dmamask = ~(u32)0;
 135
 136 static struct platform_device musb_device = {
 137         .name           = "musb_hdrc",
 138         .id             = -1,
 139         .dev = {
 140                 .dma_mask               = &musb_dmamask,
 141                 .coherent_dma_mask      = 0xffffffff,
 142                 .platform_data          = &musb_plat,
 143         },
 144         .num_resources  = ARRAY_SIZE(musb_resources),
 145         .resource       = musb_resources,
 146 };
 147 #endif
 148
 149
 150 void __init usb_musb_init(void)
 151 {
 152 #ifdef CONFIG_USB_MUSB_SOC
 153         if (platform_device_register(&musb_device) < 0) {
 154                 printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n");
 155                 return;
 156         }
 157 #endif
 158 }
 159