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

   1 /*
   2  * Infineon/ADMTek 8668 (WildPass) platform devices support
   3  *
   4  * Copyright (C) 2010 Scott Nicholas <neutronscott@scottn.us>
   5  * Copyright (C) 2012 Florian Fainelli <florian@openwrt.org>
   6  *
   7  * This file is subject to the terms and conditions of the GNU General Public
   8  * License.  See the file "COPYING" in the main directory of this archive
   9  * for more details.
  10  */
  11
  12 #include <linux/init.h>
  13 #include <linux/kernel.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/platform_data/tulip.h>
  16 #include <linux/usb/ehci_pdriver.h>
  17 #include <linux/mtd/physmap.h>
  18 #include <linux/mtd/partitions.h>
  19 #include <linux/pci.h>
  20 #include <linux/slab.h>
  21 #include <linux/ioport.h>
  22 #include <linux/amba/bus.h>
  23 #include <linux/amba/serial.h>
  24
  25 #include <asm/reboot.h>
  26 #include <asm/time.h>
  27 #include <asm/addrspace.h>
  28 #include <asm/bootinfo.h>
  29 #include <asm/io.h>
  30 #include <adm8668.h>
  31
  32 #define ADM8868_UBOOT_ENV               0x20000
  33 #define ADM8868_UBOOT_WAN_MAC           0x5ac
  34 #define ADM8868_UBOOT_LAN_MAC           0x404
  35
  36 static void adm8668_uart_set_mctrl(struct amba_device *dev,
  37                                         void __iomem *base,
  38                                         unsigned int mcrtl)
  39 {
  40 }
  41
  42 static struct amba_pl010_data adm8668_uart0_data = {
  43         .set_mctrl = adm8668_uart_set_mctrl,
  44 };
  45
  46 static struct amba_device adm8668_uart0_device = {
  47         .dev = {
  48                 .init_name      = "apb:uart0",
  49                 .platform_data  = &adm8668_uart0_data,
  50         },
  51         .res = {
  52                 .start          = ADM8668_UART0_BASE,
  53                 .end            = ADM8668_UART0_BASE + 0xF,
  54                 .flags          = IORESOURCE_MEM,
  55         },
  56         .irq = {
  57                 INT_LVL_UART0,
  58                 -1
  59         },
  60         .periphid = 0x0041010,
  61 };
  62
  63 static struct resource eth0_resources[] = {
  64         {
  65                 .start          = ADM8668_LAN_BASE,
  66                 .end            = ADM8668_LAN_BASE + 256,
  67                 .flags          = IORESOURCE_MEM,
  68         },
  69         {
  70                 .start          = INT_LVL_LAN,
  71                 .flags          = IORESOURCE_IRQ,
  72         },
  73 };
  74
  75 static struct tulip_platform_data eth0_pdata = {
  76         .chip_id        = ADM8668,
  77 };
  78
  79 static struct platform_device adm8668_eth0_device = {
  80         .name           = "tulip",
  81         .id             = 0,
  82         .resource       = eth0_resources,
  83         .num_resources  = ARRAY_SIZE(eth0_resources),
  84         .dev.platform_data = &eth0_pdata,
  85 };
  86
  87 static struct resource eth1_resources[] = {
  88         {
  89                 .start          = ADM8668_WAN_BASE,
  90                 .end            = ADM8668_WAN_BASE + 256,
  91                 .flags          = IORESOURCE_MEM,
  92         },
  93         {
  94                 .start          = INT_LVL_WAN,
  95                 .flags          = IORESOURCE_IRQ,
  96         },
  97 };
  98
  99 static struct tulip_platform_data eth1_pdata = {
 100         .chip_id        = ADM8668,
 101 };
 102
 103 static struct platform_device adm8668_eth1_device = {
 104         .name           = "tulip",
 105         .id             = 1,
 106         .resource       = eth1_resources,
 107         .num_resources  = ARRAY_SIZE(eth1_resources),
 108         .dev.platform_data = &eth1_pdata,
 109 };
 110
 111 static const char *nor_probe_types[] = { "adm8668part", NULL };
 112
 113 static struct physmap_flash_data nor_flash_data = {
 114         .width                  = 2,
 115         .part_probe_types       = nor_probe_types,
 116 };
 117
 118 static struct resource nor_resources[] = {
 119         {
 120                 .start  = ADM8668_SMEM1_BASE,
 121                 .end    = ADM8668_SMEM1_BASE + 0x800000 - 1,
 122                 .flags  = IORESOURCE_MEM,
 123         },
 124 };
 125
 126 static struct platform_device adm8668_nor_device = {
 127         .name           = "physmap-flash",
 128         .id             = -1,
 129         .resource       = nor_resources,
 130         .num_resources  = ARRAY_SIZE(nor_resources),
 131         .dev.platform_data = &nor_flash_data,
 132 };
 133
 134 static struct resource usb_resources[] = {
 135         {
 136                 .start  = ADM8668_USB_BASE,
 137                 .end    = ADM8668_USB_BASE + 0x1FFFFF,
 138                 .flags  = IORESOURCE_MEM,
 139         },
 140         {
 141                 .start  = INT_LVL_USB,
 142                 .end    = INT_LVL_USB,
 143                 .flags  = IORESOURCE_IRQ,
 144         },
 145 };
 146
 147 static struct usb_ehci_pdata usb_pdata = {
 148         .caps_offset    = 0x100,
 149         .has_tt         = 1,
 150         .port_power_off = 1,
 151 };
 152
 153 static struct platform_device adm8668_usb_device = {
 154         .name           = "ehci-platform",
 155         .id             = -1,
 156         .resource       = usb_resources,
 157         .num_resources  = ARRAY_SIZE(usb_resources),
 158         .dev.platform_data = &usb_pdata,
 159 };
 160
 161 static struct platform_device *adm8668_devs[] = {
 162         &adm8668_eth0_device,
 163         &adm8668_eth1_device,
 164         &adm8668_nor_device,
 165         &adm8668_usb_device,
 166 };
 167
 168 static void adm8668_fetch_mac(int unit)
 169 {
 170         u8 *mac;
 171         u32 offset;
 172         struct tulip_platform_data *pdata;
 173
 174         switch (unit) {
 175         case -1:
 176         case 0:
 177                 offset = ADM8868_UBOOT_LAN_MAC;
 178                 pdata = &eth0_pdata;
 179                 break;
 180         case 1:
 181                 offset = ADM8868_UBOOT_WAN_MAC;
 182                 pdata = &eth1_pdata;
 183                 break;
 184         default:
 185                 pr_err("unsupported ethernet unit: %d\n", unit);
 186                 return;
 187         }
 188
 189         mac = (u8 *)(KSEG1ADDR(ADM8668_SMEM1_BASE) + ADM8868_UBOOT_ENV + offset);
 190
 191         memcpy(pdata->mac, mac, sizeof(pdata->mac));
 192 }
 193
 194 static void adm8668_ehci_workaround(void)
 195 {
 196         u32 chipid;
 197
 198         chipid = ADM8668_CONFIG_REG(ADM8668_CR0);
 199         ADM8668_CONFIG_REG(ADM8668_CR66) = 0x0C1600D9;
 200
 201         if (chipid == 0x86880001)
 202                 return;
 203
 204         ADM8668_CONFIG_REG(ADM8668_CR66) &= ~(3 << 20);
 205         ADM8668_CONFIG_REG(ADM8668_CR66) |= (1 << 20);
 206         pr_info("ADM8668: applied USB workaround\n");
 207 }
 208
 209
 210 int __devinit adm8668_devs_register(void)
 211 {
 212         int ret;
 213
 214         ret = amba_device_register(&adm8668_uart0_device, &iomem_resource);
 215         if (ret)
 216                 panic("failed to register AMBA UART");
 217
 218         adm8668_fetch_mac(0);
 219         adm8668_fetch_mac(1);
 220         adm8668_ehci_workaround();
 221
 222         return platform_add_devices(adm8668_devs, ARRAY_SIZE(adm8668_devs));
 223 }
 224 arch_initcall(adm8668_devs_register);