arch/arm/plat-mxc/ehci.c

   1 /*
   2  * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the
   6  * Free Software Foundation; either version 2 of the License, or (at your
   7  * option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software Foundation,
  16  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  */
  18
  19 #include <linux/platform_device.h>
  20 #include <linux/io.h>
  21
  22 #include <mach/hardware.h>
  23 #include <mach/mxc_ehci.h>
  24
  25 #define USBCTRL_OTGBASE_OFFSET  0x600
  26
  27 #define MX31_OTG_SIC_SHIFT      29
  28 #define MX31_OTG_SIC_MASK       (0xf << MX31_OTG_SIC_SHIFT)
  29 #define MX31_OTG_PM_BIT         (1 << 24)
  30
  31 #define MX31_H2_SIC_SHIFT       21
  32 #define MX31_H2_SIC_MASK        (0xf << MX31_H2_SIC_SHIFT)
  33 #define MX31_H2_PM_BIT          (1 << 16)
  34 #define MX31_H2_DT_BIT          (1 << 5)
  35
  36 #define MX31_H1_SIC_SHIFT       13
  37 #define MX31_H1_SIC_MASK        (0xf << MX31_H1_SIC_SHIFT)
  38 #define MX31_H1_PM_BIT          (1 << 8)
  39 #define MX31_H1_DT_BIT          (1 << 4)
  40
  41 int mxc_set_usbcontrol(int port, unsigned int flags)
  42 {
  43         unsigned int v;
  44
  45         if (cpu_is_mx31()) {
  46                 v = readl(IO_ADDRESS(MX31_OTG_BASE_ADDR +
  47                                      USBCTRL_OTGBASE_OFFSET));
  48
  49                 switch (port) {
  50                 case 0: /* OTG port */
  51                         v &= ~(MX31_OTG_SIC_MASK | MX31_OTG_PM_BIT);
  52                         v |= (flags & MXC_EHCI_INTERFACE_MASK)
  53                                         << MX31_OTG_SIC_SHIFT;
  54                         if (flags & MXC_EHCI_POWER_PINS_ENABLED)
  55                                 v |= MX31_OTG_PM_BIT;
  56
  57                         break;
  58                 case 1: /* H1 port */
  59                         v &= ~(MX31_H1_SIC_MASK | MX31_H1_PM_BIT);
  60                         v |= (flags & MXC_EHCI_INTERFACE_MASK)
  61                                                 << MX31_H1_SIC_SHIFT;
  62                         if (flags & MXC_EHCI_POWER_PINS_ENABLED)
  63                                 v |= MX31_H1_PM_BIT;
  64
  65                         if (!(flags & MXC_EHCI_TTL_ENABLED))
  66                                 v |= MX31_H1_DT_BIT;
  67
  68                         break;
  69                 case 2: /* H2 port */
  70                         v &= ~(MX31_H2_SIC_MASK | MX31_H2_PM_BIT);
  71                         v |= (flags & MXC_EHCI_INTERFACE_MASK)
  72                                                 << MX31_H2_SIC_SHIFT;
  73                         if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
  74                                 v |= MX31_H2_PM_BIT;
  75
  76                         if (!(flags & MXC_EHCI_TTL_ENABLED))
  77                                 v |= MX31_H2_DT_BIT;
  78
  79                         break;
  80                 }
  81
  82                 writel(v, IO_ADDRESS(MX31_OTG_BASE_ADDR +
  83                                      USBCTRL_OTGBASE_OFFSET));
  84                 return 0;
  85         }
  86
  87         printk(KERN_WARNING
  88                 "%s() unable to setup USBCONTROL for this CPU\n", __func__);
  89         return -EINVAL;
  90 }
  91 EXPORT_SYMBOL(mxc_set_usbcontrol);
  92