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 #define OTG_SYSCONFIG   (OMAP34XX_HSUSB_OTG_BASE + 0x404)
  35
  36 static void __init usb_musb_pm_init(void)
  37 {
  38         /* Ensure force-idle mode for OTG controller */
  39         if (cpu_is_omap34xx())
  40                 omap_writel(0, OTG_SYSCONFIG);
  41 }
  42
  43 #ifdef CONFIG_USB_MUSB_SOC
  44
  45 static struct resource musb_resources[] = {
  46         [0] = { /* start and end set dynamically */
  47                 .flags  = IORESOURCE_MEM,
  48         },
  49         [1] = { /* general IRQ */
  50                 .start  = INT_243X_HS_USB_MC,
  51                 .flags  = IORESOURCE_IRQ,
  52         },
  53         [2] = { /* DMA IRQ */
  54                 .start  = INT_243X_HS_USB_DMA,
  55                 .flags  = IORESOURCE_IRQ,
  56         },
  57 };
  58
  59 static int clk_on;
  60
  61 static int musb_set_clock(struct clk *clk, int state)
  62 {
  63         if (state) {
  64                 if (clk_on > 0)
  65                         return -ENODEV;
  66
  67                 clk_enable(clk);
  68                 clk_on = 1;
  69         } else {
  70                 if (clk_on == 0)
  71                         return -ENODEV;
  72
  73                 clk_disable(clk);
  74                 clk_on = 0;
  75         }
  76
  77         return 0;
  78 }
  79
  80 static struct musb_hdrc_eps_bits musb_eps[] = {
  81         {       "ep1_tx", 10,   },
  82         {       "ep1_rx", 10,   },
  83         {       "ep2_tx", 9,    },
  84         {       "ep2_rx", 9,    },
  85         {       "ep3_tx", 3,    },
  86         {       "ep3_rx", 3,    },
  87         {       "ep4_tx", 3,    },
  88         {       "ep4_rx", 3,    },
  89         {       "ep5_tx", 3,    },
  90         {       "ep5_rx", 3,    },
  91         {       "ep6_tx", 3,    },
  92         {       "ep6_rx", 3,    },
  93         {       "ep7_tx", 3,    },
  94         {       "ep7_rx", 3,    },
  95         {       "ep8_tx", 2,    },
  96         {       "ep8_rx", 2,    },
  97         {       "ep9_tx", 2,    },
  98         {       "ep9_rx", 2,    },
  99         {       "ep10_tx", 2,   },
 100         {       "ep10_rx", 2,   },
 101         {       "ep11_tx", 2,   },
 102         {       "ep11_rx", 2,   },
 103         {       "ep12_tx", 2,   },
 104         {       "ep12_rx", 2,   },
 105         {       "ep13_tx", 2,   },
 106         {       "ep13_rx", 2,   },
 107         {       "ep14_tx", 2,   },
 108         {       "ep14_rx", 2,   },
 109         {       "ep15_tx", 2,   },
 110         {       "ep15_rx", 2,   },
 111 };
 112
 113 static struct musb_hdrc_config musb_config = {
 114         .multipoint     = 1,
 115         .dyn_fifo       = 1,
 116         .soft_con       = 1,
 117         .dma            = 1,
 118         .num_eps        = 16,
 119         .dma_channels   = 7,
 120         .dma_req_chan   = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3),
 121         .ram_bits       = 12,
 122         .eps_bits       = musb_eps,
 123 };
 124
 125 static struct musb_hdrc_platform_data musb_plat = {
 126 #ifdef CONFIG_USB_MUSB_OTG
 127         .mode           = MUSB_OTG,
 128 #elif defined(CONFIG_USB_MUSB_HDRC_HCD)
 129         .mode           = MUSB_HOST,
 130 #elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
 131         .mode           = MUSB_PERIPHERAL,
 132 #endif
 133         /* .clock is set dynamically */
 134         .set_clock      = musb_set_clock,
 135         .config         = &musb_config,
 136
 137         /* REVISIT charge pump on TWL4030 can supply up to
 138          * 100 mA ... but this value is board-specific, like
 139          * "mode", and should be passed to usb_musb_init().
 140          */
 141         .power          = 50,                   /* up to 100 mA */
 142 };
 143
 144 static u64 musb_dmamask = DMA_BIT_MASK(32);
 145
 146 static struct platform_device musb_device = {
 147         .name           = "musb_hdrc",
 148         .id             = -1,
 149         .dev = {
 150                 .dma_mask               = &musb_dmamask,
 151                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 152                 .platform_data          = &musb_plat,
 153         },
 154         .num_resources  = ARRAY_SIZE(musb_resources),
 155         .resource       = musb_resources,
 156 };
 157
 158 void __init usb_musb_init(void)
 159 {
 160         if (cpu_is_omap243x())
 161                 musb_resources[0].start = OMAP243X_HS_BASE;
 162         else
 163                 musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE;
 164         musb_resources[0].end = musb_resources[0].start + SZ_8K - 1;
 165
 166         /*
 167          * REVISIT: This line can be removed once all the platforms using
 168          * musb_core.c have been converted to use use clkdev.
 169          */
 170         musb_plat.clock = "ick";
 171
 172         if (platform_device_register(&musb_device) < 0) {
 173                 printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n");
 174                 return;
 175         }
 176
 177         usb_musb_pm_init();
 178 }
 179
 180 #else
 181 void __init usb_musb_init(void)
 182 {
 183         usb_musb_pm_init();
 184 }
 185 #endif /* CONFIG_USB_MUSB_SOC */