drivers/usb/host/ehci-exynos.c

   1 /*
   2  * SAMSUNG EXYNOS USB HOST EHCI Controller
   3  *
   4  * Copyright (C) 2012 Samsung Electronics Co.Ltd
   5  *      Vivek Gautam <gautam.vivek@samsung.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  20  * MA 02110-1301 USA
  21  */
  22
  23 #include <common.h>
  24 #include <usb.h>
  25 #include <asm/arch/cpu.h>
  26 #include <asm/arch/ehci.h>
  27 #include <asm/arch/system.h>
  28 #include "ehci.h"
  29 #include "ehci-core.h"
  30
  31 /* Setup the EHCI host controller. */
  32 static void setup_usb_phy(struct exynos_usb_phy *usb)
  33 {
  34         set_usbhost_mode(USB20_PHY_CFG_HOST_LINK_EN);
  35
  36         clrbits_le32(&usb->usbphyctrl0,
  37                         HOST_CTRL0_FSEL_MASK |
  38                         HOST_CTRL0_COMMONON_N |
  39                         /* HOST Phy setting */
  40                         HOST_CTRL0_PHYSWRST |
  41                         HOST_CTRL0_PHYSWRSTALL |
  42                         HOST_CTRL0_SIDDQ |
  43                         HOST_CTRL0_FORCESUSPEND |
  44                         HOST_CTRL0_FORCESLEEP);
  45
  46         setbits_le32(&usb->usbphyctrl0,
  47                         /* Setting up the ref freq */
  48                         (CLK_24MHZ << 16) |
  49                         /* HOST Phy setting */
  50                         HOST_CTRL0_LINKSWRST |
  51                         HOST_CTRL0_UTMISWRST);
  52         udelay(10);
  53         clrbits_le32(&usb->usbphyctrl0,
  54                         HOST_CTRL0_LINKSWRST |
  55                         HOST_CTRL0_UTMISWRST);
  56         udelay(20);
  57
  58         /* EHCI Ctrl setting */
  59         setbits_le32(&usb->ehcictrl,
  60                         EHCICTRL_ENAINCRXALIGN |
  61                         EHCICTRL_ENAINCR4 |
  62                         EHCICTRL_ENAINCR8 |
  63                         EHCICTRL_ENAINCR16);
  64 }
  65
  66 /* Reset the EHCI host controller. */
  67 static void reset_usb_phy(struct exynos_usb_phy *usb)
  68 {
  69         /* HOST_PHY reset */
  70         setbits_le32(&usb->usbphyctrl0,
  71                         HOST_CTRL0_PHYSWRST |
  72                         HOST_CTRL0_PHYSWRSTALL |
  73                         HOST_CTRL0_SIDDQ |
  74                         HOST_CTRL0_FORCESUSPEND |
  75                         HOST_CTRL0_FORCESLEEP);
  76 }
  77
  78 /*
  79  * EHCI-initialization
  80  * Create the appropriate control structures to manage
  81  * a new EHCI host controller.
  82  */
  83 int ehci_hcd_init(void)
  84 {
  85         struct exynos_usb_phy *usb;
  86
  87         usb = (struct exynos_usb_phy *)samsung_get_base_usb_phy();
  88         setup_usb_phy(usb);
  89
  90         hccr = (struct ehci_hccr *)samsung_get_base_usb_ehci();
  91         hcor = (struct ehci_hcor *)((uint32_t) hccr
  92                                 + HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
  93
  94         debug("Exynos5-ehci: init hccr %x and hcor %x hc_length %d\n",
  95                 (uint32_t)hccr, (uint32_t)hcor,
  96                 (uint32_t)HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
  97
  98         return 0;
  99 }
 100
 101 /*
 102  * Destroy the appropriate control structures corresponding
 103  * the EHCI host controller.
 104  */
 105 int ehci_hcd_stop()
 106 {
 107         struct exynos_usb_phy *usb;
 108
 109         usb = (struct exynos_usb_phy *)samsung_get_base_usb_phy();
 110         reset_usb_phy(usb);
 111
 112         return 0;
 113 }