root/arch/mips/netlogic/xlp/usb-init.c

DEFINITIONS

1. nlm_usb_intr_en
2. nlm_usb_hw_reset
3. nlm_platform_usb_init
4. nlm_usb_fixup_final

   1 /*
   2  * Copyright (c) 2003-2012 Broadcom Corporation
   3  * All Rights Reserved
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the Broadcom
   9  * license below:
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  *
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in
  19  *    the documentation and/or other materials provided with the
  20  *    distribution.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY BROADCOM ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  29  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  30  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  31  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  32  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34 
  35 #include <linux/dma-mapping.h>
  36 #include <linux/kernel.h>
  37 #include <linux/delay.h>
  38 #include <linux/init.h>
  39 #include <linux/pci.h>
  40 #include <linux/platform_device.h>
  41 
  42 #include <asm/netlogic/haldefs.h>
  43 #include <asm/netlogic/xlp-hal/iomap.h>
  44 #include <asm/netlogic/xlp-hal/xlp.h>
  45 
  46 /*
  47  * USB glue logic registers, used only during initialization
  48  */
  49 #define USB_CTL_0                       0x01
  50 #define USB_PHY_0                       0x0A
  51 #define USB_PHY_RESET                   0x01
  52 #define USB_PHY_PORT_RESET_0            0x10
  53 #define USB_PHY_PORT_RESET_1            0x20
  54 #define USB_CONTROLLER_RESET            0x01
  55 #define USB_INT_STATUS                  0x0E
  56 #define USB_INT_EN                      0x0F
  57 #define USB_PHY_INTERRUPT_EN            0x01
  58 #define USB_OHCI_INTERRUPT_EN           0x02
  59 #define USB_OHCI_INTERRUPT1_EN          0x04
  60 #define USB_OHCI_INTERRUPT2_EN          0x08
  61 #define USB_CTRL_INTERRUPT_EN           0x10
  62 
  63 #define nlm_read_usb_reg(b, r)                  nlm_read_reg(b, r)
  64 #define nlm_write_usb_reg(b, r, v)              nlm_write_reg(b, r, v)
  65 #define nlm_get_usb_pcibase(node, inst)         \
  66         nlm_pcicfg_base(XLP_IO_USB_OFFSET(node, inst))
  67 #define nlm_get_usb_regbase(node, inst)         \
  68         (nlm_get_usb_pcibase(node, inst) + XLP_IO_PCI_HDRSZ)
  69 
  70 static void nlm_usb_intr_en(int node, int port)
  71 {
  72         uint32_t val;
  73         uint64_t port_addr;
  74 
  75         port_addr = nlm_get_usb_regbase(node, port);
  76         val = nlm_read_usb_reg(port_addr, USB_INT_EN);
  77         val = USB_CTRL_INTERRUPT_EN  | USB_OHCI_INTERRUPT_EN |
  78                 USB_OHCI_INTERRUPT1_EN | USB_OHCI_INTERRUPT2_EN;
  79         nlm_write_usb_reg(port_addr, USB_INT_EN, val);
  80 }
  81 
  82 static void nlm_usb_hw_reset(int node, int port)
  83 {
  84         uint64_t port_addr;
  85         uint32_t val;
  86 
  87         /* reset USB phy */
  88         port_addr = nlm_get_usb_regbase(node, port);
  89         val = nlm_read_usb_reg(port_addr, USB_PHY_0);
  90         val &= ~(USB_PHY_RESET | USB_PHY_PORT_RESET_0 | USB_PHY_PORT_RESET_1);
  91         nlm_write_usb_reg(port_addr, USB_PHY_0, val);
  92 
  93         mdelay(100);
  94         val = nlm_read_usb_reg(port_addr, USB_CTL_0);
  95         val &= ~(USB_CONTROLLER_RESET);
  96         val |= 0x4;
  97         nlm_write_usb_reg(port_addr, USB_CTL_0, val);
  98 }
  99 
 100 static int __init nlm_platform_usb_init(void)
 101 {
 102         if (cpu_is_xlpii())
 103                 return 0;
 104 
 105         pr_info("Initializing USB Interface\n");
 106         nlm_usb_hw_reset(0, 0);
 107         nlm_usb_hw_reset(0, 3);
 108 
 109         /* Enable PHY interrupts */
 110         nlm_usb_intr_en(0, 0);
 111         nlm_usb_intr_en(0, 3);
 112 
 113         return 0;
 114 }
 115 
 116 arch_initcall(nlm_platform_usb_init);
 117 
 118 static u64 xlp_usb_dmamask = ~(u32)0;
 119 
 120 /* Fixup the IRQ for USB devices which is exist on XLP SOC PCIE bus */
 121 static void nlm_usb_fixup_final(struct pci_dev *dev)
 122 {
 123         dev->dev.dma_mask               = &xlp_usb_dmamask;
 124         dev->dev.coherent_dma_mask      = DMA_BIT_MASK(32);
 125         switch (dev->devfn) {
 126         case 0x10:
 127                 dev->irq = PIC_EHCI_0_IRQ;
 128                 break;
 129         case 0x11:
 130                 dev->irq = PIC_OHCI_0_IRQ;
 131                 break;
 132         case 0x12:
 133                 dev->irq = PIC_OHCI_1_IRQ;
 134                 break;
 135         case 0x13:
 136                 dev->irq = PIC_EHCI_1_IRQ;
 137                 break;
 138         case 0x14:
 139                 dev->irq = PIC_OHCI_2_IRQ;
 140                 break;
 141         case 0x15:
 142                 dev->irq = PIC_OHCI_3_IRQ;
 143                 break;
 144         }
 145 }
 146 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_NETLOGIC, PCI_DEVICE_ID_NLM_EHCI,
 147                 nlm_usb_fixup_final);
 148 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_NETLOGIC, PCI_DEVICE_ID_NLM_OHCI,
 149                 nlm_usb_fixup_final);