root/arch/arm/mach-imx/ehci-imx27.c

DEFINITIONS

1. mx27_initialize_usb_hw

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
   4  * Copyright (C) 2010 Freescale Semiconductor, Inc.
   5  */
   6 
   7 #include <linux/platform_device.h>
   8 #include <linux/io.h>
   9 #include <linux/platform_data/usb-ehci-mxc.h>
  10 
  11 #include "ehci.h"
  12 #include "hardware.h"
  13 
  14 #define USBCTRL_OTGBASE_OFFSET  0x600
  15 
  16 #define MX27_OTG_SIC_SHIFT      29
  17 #define MX27_OTG_SIC_MASK       (0x3 << MX27_OTG_SIC_SHIFT)
  18 #define MX27_OTG_PM_BIT         (1 << 24)
  19 
  20 #define MX27_H2_SIC_SHIFT       21
  21 #define MX27_H2_SIC_MASK        (0x3 << MX27_H2_SIC_SHIFT)
  22 #define MX27_H2_PM_BIT          (1 << 16)
  23 #define MX27_H2_DT_BIT          (1 << 5)
  24 
  25 #define MX27_H1_SIC_SHIFT       13
  26 #define MX27_H1_SIC_MASK        (0x3 << MX27_H1_SIC_SHIFT)
  27 #define MX27_H1_PM_BIT          (1 << 8)
  28 #define MX27_H1_DT_BIT          (1 << 4)
  29 
  30 int mx27_initialize_usb_hw(int port, unsigned int flags)
  31 {
  32         unsigned int v;
  33 
  34         v = readl(MX27_IO_ADDRESS(MX27_USB_BASE_ADDR + USBCTRL_OTGBASE_OFFSET));
  35 
  36         switch (port) {
  37         case 0: /* OTG port */
  38                 v &= ~(MX27_OTG_SIC_MASK | MX27_OTG_PM_BIT);
  39                 v |= (flags & MXC_EHCI_INTERFACE_MASK) << MX27_OTG_SIC_SHIFT;
  40 
  41                 if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
  42                         v |= MX27_OTG_PM_BIT;
  43                 break;
  44         case 1: /* H1 port */
  45                 v &= ~(MX27_H1_SIC_MASK | MX27_H1_PM_BIT | MX27_H1_DT_BIT);
  46                 v |= (flags & MXC_EHCI_INTERFACE_MASK) << MX27_H1_SIC_SHIFT;
  47 
  48                 if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
  49                         v |= MX27_H1_PM_BIT;
  50 
  51                 if (!(flags & MXC_EHCI_TTL_ENABLED))
  52                         v |= MX27_H1_DT_BIT;
  53 
  54                 break;
  55         case 2: /* H2 port */
  56                 v &= ~(MX27_H2_SIC_MASK | MX27_H2_PM_BIT | MX27_H2_DT_BIT);
  57                 v |= (flags & MXC_EHCI_INTERFACE_MASK) << MX27_H2_SIC_SHIFT;
  58 
  59                 if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
  60                         v |= MX27_H2_PM_BIT;
  61 
  62                 if (!(flags & MXC_EHCI_TTL_ENABLED))
  63                         v |= MX27_H2_DT_BIT;
  64 
  65                 break;
  66         default:
  67                 return -EINVAL;
  68         }
  69 
  70         writel(v, MX27_IO_ADDRESS(MX27_USB_BASE_ADDR + USBCTRL_OTGBASE_OFFSET));
  71 
  72         return 0;
  73 }
  74