target/linux/adm8668/files-3.14/arch/mips/adm8668/platform.c

   1 /*
   2  * Copyright (C) 2010 Scott Nicholas <neutronscott@scottn.us>
   3  * Copyright (C) 2012 Florian Fainelli <florian@openwrt.org>
   4  *
   5  * This file is subject to the terms and conditions of the GNU General Public
   6  * License.  See the file "COPYING" in the main directory of this archive
   7  * for more details.
   8  */
   9
  10 #include <linux/init.h>
  11 #include <linux/kernel.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/platform_data/tulip.h>
  14 #include <linux/usb/ehci_pdriver.h>
  15 #include <linux/mtd/physmap.h>
  16 #include <linux/pci.h>
  17 #include <linux/slab.h>
  18 #include <linux/ioport.h>
  19 #include <linux/amba/bus.h>
  20 #include <linux/amba/serial.h>
  21
  22 #include <asm/reboot.h>
  23 #include <asm/time.h>
  24 #include <asm/addrspace.h>
  25 #include <asm/bootinfo.h>
  26 #include <asm/io.h>
  27 #include <adm8668.h>
  28
  29 #define ADM8868_UBOOT_ENV               0x20000
  30 #define ADM8868_UBOOT_WAN_MAC           0x5ac
  31 #define ADM8868_UBOOT_LAN_MAC           0x404
  32
  33 static void adm8668_uart_set_mctrl(struct amba_device *dev,
  34                                         void __iomem *base,
  35                                         unsigned int mcrtl)
  36 {
  37 }
  38
  39 static struct amba_pl010_data adm8668_uart0_data = {
  40         .set_mctrl = adm8668_uart_set_mctrl,
  41 };
  42
  43 static struct amba_device adm8668_uart0_device = {
  44         .dev = {
  45                 .init_name      = "apb:uart0",
  46                 .platform_data  = &adm8668_uart0_data,
  47         },
  48         .res = {
  49                 .start          = ADM8668_UART0_BASE,
  50                 .end            = ADM8668_UART0_BASE + 0xF,
  51                 .flags          = IORESOURCE_MEM,
  52         },
  53         .irq = {
  54                 ADM8668_UART0_IRQ,
  55                 -1
  56         },
  57         .periphid = 0x0041010,
  58 };
  59
  60 static struct resource eth0_resources[] = {
  61         {
  62                 .start          = ADM8668_LAN_BASE,
  63                 .end            = ADM8668_LAN_BASE + 256,
  64                 .flags          = IORESOURCE_MEM,
  65         },
  66         {
  67                 .start          = ADM8668_LAN_IRQ,
  68                 .flags          = IORESOURCE_IRQ,
  69         },
  70 };
  71
  72 static struct tulip_platform_data eth0_pdata = {
  73         .chip_id        = ADM8668,
  74 };
  75
  76 static struct platform_device adm8668_eth0_device = {
  77         .name           = "tulip",
  78         .id             = 0,
  79         .resource       = eth0_resources,
  80         .num_resources  = ARRAY_SIZE(eth0_resources),
  81         .dev.platform_data = &eth0_pdata,
  82 };
  83
  84 static struct resource eth1_resources[] = {
  85         {
  86                 .start          = ADM8668_WAN_BASE,
  87                 .end            = ADM8668_WAN_BASE + 256,
  88                 .flags          = IORESOURCE_MEM,
  89         },
  90         {
  91                 .start          = ADM8668_WAN_IRQ,
  92                 .flags          = IORESOURCE_IRQ,
  93         },
  94 };
  95
  96 static struct tulip_platform_data eth1_pdata = {
  97         .chip_id        = ADM8668,
  98 };
  99
 100 static struct platform_device adm8668_eth1_device = {
 101         .name           = "tulip",
 102         .id             = 1,
 103         .resource       = eth1_resources,
 104         .num_resources  = ARRAY_SIZE(eth1_resources),
 105         .dev.platform_data = &eth1_pdata,
 106 };
 107
 108 static struct resource usb_resources[] = {
 109         {
 110                 .start  = ADM8668_USB_BASE,
 111                 .end    = ADM8668_USB_BASE + 0x1FFFFF,
 112                 .flags  = IORESOURCE_MEM,
 113         },
 114         {
 115                 .start  = ADM8668_USB_IRQ,
 116                 .end    = ADM8668_USB_IRQ,
 117                 .flags  = IORESOURCE_IRQ,
 118         },
 119 };
 120
 121 static struct usb_ehci_pdata usb_pdata = {
 122         .caps_offset    = 0x100,
 123         .has_tt         = 1,
 124 };
 125
 126 static struct platform_device adm8668_usb_device = {
 127         .name           = "ehci-platform",
 128         .id             = -1,
 129         .resource       = usb_resources,
 130         .num_resources  = ARRAY_SIZE(usb_resources),
 131         .dev.platform_data = &usb_pdata,
 132 };
 133
 134 static struct platform_device *adm8668_devs[] = {
 135         &adm8668_eth0_device,
 136         &adm8668_eth1_device,
 137         &adm8668_usb_device,
 138 };
 139
 140 static void adm8668_fetch_mac(int unit)
 141 {
 142         u8 *mac;
 143         u32 offset;
 144         struct tulip_platform_data *pdata;
 145
 146         switch (unit) {
 147         case -1:
 148         case 0:
 149                 offset = ADM8868_UBOOT_LAN_MAC;
 150                 pdata = &eth0_pdata;
 151                 break;
 152         case 1:
 153                 offset = ADM8868_UBOOT_WAN_MAC;
 154                 pdata = &eth1_pdata;
 155                 break;
 156         default:
 157                 pr_err("unsupported ethernet unit: %d\n", unit);
 158                 return;
 159         }
 160
 161         mac = (u8 *)(KSEG1ADDR(ADM8668_SMEM1_BASE) + ADM8868_UBOOT_ENV + offset);
 162
 163         memcpy(pdata->mac, mac, sizeof(pdata->mac));
 164 }
 165
 166 static void adm8668_ehci_workaround(void)
 167 {
 168         u32 chipid;
 169
 170         chipid = ADM8668_CONFIG_REG(ADM8668_CR0);
 171         ADM8668_CONFIG_REG(ADM8668_CR66) = 0x0C1600D9;
 172
 173         if (chipid == 0x86880001)
 174                 return;
 175
 176         ADM8668_CONFIG_REG(ADM8668_CR66) &= ~(3 << 20);
 177         ADM8668_CONFIG_REG(ADM8668_CR66) |= (1 << 20);
 178         pr_info("ADM8668: applied USB workaround\n");
 179 }
 180
 181
 182 int __init adm8668_devs_register(void)
 183 {
 184         int ret;
 185
 186         ret = amba_device_register(&adm8668_uart0_device, &iomem_resource);
 187         if (ret)
 188                 panic("failed to register AMBA UART");
 189
 190         adm8668_fetch_mac(0);
 191         adm8668_fetch_mac(1);
 192         adm8668_ehci_workaround();
 193
 194         return platform_add_devices(adm8668_devs, ARRAY_SIZE(adm8668_devs));
 195 }
 196 arch_initcall(adm8668_devs_register);