target/linux/ramips/files/arch/mips/ralink/rt3883/devices.c

   1 /*
   2  *  Ralink RT3662/RT3883 SoC platform device registration
   3  *
   4  *  Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify it
   7  *  under the terms of the GNU General Public License version 2 as published
   8  *  by the Free Software Foundation.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/mtd/mtd.h>
  14 #include <linux/mtd/physmap.h>
  15 #include <linux/mtd/partitions.h>
  16 #include <linux/dma-mapping.h>
  17 #include <linux/delay.h>
  18 #include <linux/err.h>
  19 #include <linux/clk.h>
  20 #include <linux/rt2x00_platform.h>
  21
  22 #include <asm/addrspace.h>
  23
  24 #include <asm/mach-ralink/rt3883.h>
  25 #include <asm/mach-ralink/rt3883_regs.h>
  26 #include <asm/mach-ralink/rt3883_ehci_platform.h>
  27 #include <asm/mach-ralink/rt3883_ohci_platform.h>
  28 #include <asm/mach-ralink/ramips_nand_platform.h>
  29 #include "devices.h"
  30
  31 #include <ramips_eth_platform.h>
  32
  33 static struct resource rt3883_flash0_resources[] = {
  34         {
  35                 .flags  = IORESOURCE_MEM,
  36                 .start  = RT3883_BOOT_BASE,
  37                 .end    = RT3883_BOOT_BASE + RT3883_BOOT_SIZE - 1,
  38         },
  39 };
  40
  41 struct physmap_flash_data rt3883_flash0_data;
  42 static struct platform_device rt3883_flash0_device = {
  43         .name           = "physmap-flash",
  44         .resource       = rt3883_flash0_resources,
  45         .num_resources  = ARRAY_SIZE(rt3883_flash0_resources),
  46         .dev = {
  47                 .platform_data = &rt3883_flash0_data,
  48         },
  49 };
  50
  51 static struct resource rt3883_flash1_resources[] = {
  52         {
  53                 .flags  = IORESOURCE_MEM,
  54                 .start  = RT3883_SRAM_BASE,
  55                 .end    = RT3883_SRAM_BASE + RT3883_SRAM_SIZE - 1,
  56         },
  57 };
  58
  59 struct physmap_flash_data rt3883_flash1_data;
  60 static struct platform_device rt3883_flash1_device = {
  61         .name           = "physmap-flash",
  62         .resource       = rt3883_flash1_resources,
  63         .num_resources  = ARRAY_SIZE(rt3883_flash1_resources),
  64         .dev = {
  65                 .platform_data = &rt3883_flash1_data,
  66         },
  67 };
  68
  69 static int rt3883_flash_instance __initdata;
  70 void __init rt3883_register_pflash(unsigned int id)
  71 {
  72         struct platform_device *pdev;
  73         struct physmap_flash_data *pdata;
  74         void __iomem *fscc_base;
  75         u32 t;
  76         int reg;
  77
  78         switch (id) {
  79         case 0:
  80                 pdev = &rt3883_flash0_device;
  81                 reg = RT3883_FSCC_REG_FLASH_CFG0;
  82                 break;
  83         case 1:
  84                 pdev = &rt3883_flash1_device;
  85                 reg = RT3883_FSCC_REG_FLASH_CFG1;
  86                 break;
  87         default:
  88                 return;
  89         }
  90
  91         pdata = pdev->dev.platform_data;
  92
  93         fscc_base = ioremap(RT3883_FSCC_BASE, RT3883_FSCC_SIZE);
  94         if (!fscc_base)
  95                 panic("RT3883: ioremap failed for FSCC");
  96
  97         t = __raw_readl(fscc_base + reg);
  98         iounmap(fscc_base);
  99
 100         t = (t >> RT3883_FLASH_CFG_WIDTH_SHIFT) & RT3883_FLASH_CFG_WIDTH_MASK;
 101         switch (t) {
 102         case RT3883_FLASH_CFG_WIDTH_8BIT:
 103                 pdata->width = 1;
 104                 break;
 105         case RT3883_FLASH_CFG_WIDTH_16BIT:
 106                 pdata->width = 2;
 107                 break;
 108         case RT3883_FLASH_CFG_WIDTH_32BIT:
 109                 if (id == 1) {
 110                         pdata->width = 4;
 111                         break;
 112                 }
 113                 /* fallthrough */
 114         default:
 115                 pr_warn("RT3883: flash bank%d: invalid width detected\n", id);
 116                 return;
 117         }
 118
 119         pdev->id = rt3883_flash_instance;
 120
 121         platform_device_register(pdev);
 122         rt3883_flash_instance++;
 123 }
 124
 125 static atomic_t rt3883_usb_use_count = ATOMIC_INIT(0);
 126
 127 static void rt3883_usb_host_start(void)
 128 {
 129         u32 t;
 130
 131         if (atomic_inc_return(&rt3883_usb_use_count) != 1)
 132                 return;
 133
 134         t = rt3883_sysc_rr(RT3883_SYSC_REG_USB_PS);
 135
 136 #if 0
 137         /* put the HOST controller into reset */
 138         t = rt3883_sysc_rr(RT3883_SYSC_REG_RSTCTRL);
 139         t |= RT3883_RSTCTRL_UHST;
 140         rt3883_sysc_wr(t, RT3883_SYSC_REG_RSTCTRL);
 141 #endif
 142
 143         /* enable clock for port0's and port1's phys */
 144         t = rt3883_sysc_rr(RT3883_SYSC_REG_CLKCFG1);
 145         t = t | RT3883_CLKCFG1_UPHY0_CLK_EN | RT3883_CLKCFG1_UPHY1_CLK_EN;
 146         rt3883_sysc_wr(t, RT3883_SYSC_REG_CLKCFG1);
 147         mdelay(500);
 148
 149         /* pull USBHOST and USBDEV out from reset */
 150         t = rt3883_sysc_rr(RT3883_SYSC_REG_RSTCTRL);
 151         t &= ~(RT3883_RSTCTRL_UHST | RT3883_RSTCTRL_UDEV);
 152         rt3883_sysc_wr(t, RT3883_SYSC_REG_RSTCTRL);
 153         mdelay(500);
 154
 155         /* enable host mode */
 156         t = rt3883_sysc_rr(RT3883_SYSC_REG_SYSCFG1);
 157         t |= RT3883_SYSCFG1_USB0_HOST_MODE;
 158         rt3883_sysc_wr(t, RT3883_SYSC_REG_SYSCFG1);
 159
 160         t = rt3883_sysc_rr(RT3883_SYSC_REG_USB_PS);
 161 }
 162
 163 static void rt3883_usb_host_stop(void)
 164 {
 165         u32 t;
 166
 167         if (atomic_dec_return(&rt3883_usb_use_count) != 0)
 168                 return;
 169
 170         /* put USBHOST and USBDEV into reset */
 171         t = rt3883_sysc_rr(RT3883_SYSC_REG_RSTCTRL);
 172         t |= RT3883_RSTCTRL_UHST | RT3883_RSTCTRL_UDEV;
 173         rt3883_sysc_wr(t, RT3883_SYSC_REG_RSTCTRL);
 174         udelay(10000);
 175
 176         /* disable clock for port0's and port1's phys*/
 177         t = rt3883_sysc_rr(RT3883_SYSC_REG_CLKCFG1);
 178         t &= ~(RT3883_CLKCFG1_UPHY0_CLK_EN | RT3883_CLKCFG1_UPHY1_CLK_EN);
 179         rt3883_sysc_wr(t, RT3883_SYSC_REG_CLKCFG1);
 180         udelay(10000);
 181 }
 182
 183 static struct rt3883_ehci_platform_data rt3883_ehci_data = {
 184         .start_hw       = rt3883_usb_host_start,
 185         .stop_hw        = rt3883_usb_host_stop,
 186 };
 187
 188 static struct resource rt3883_ehci_resources[] = {
 189         {
 190                 .start  = RT3883_EHCI_BASE,
 191                 .end    = RT3883_EHCI_BASE + PAGE_SIZE - 1,
 192                 .flags  = IORESOURCE_MEM,
 193         }, {
 194                 .start  = RT3883_INTC_IRQ_UHST,
 195                 .end    = RT3883_INTC_IRQ_UHST,
 196                 .flags  = IORESOURCE_IRQ,
 197         },
 198 };
 199
 200 static u64 rt3883_ehci_dmamask = DMA_BIT_MASK(32);
 201 static struct platform_device rt3883_ehci_device = {
 202         .name           = "rt3883-ehci",
 203         .id             = -1,
 204         .resource       = rt3883_ehci_resources,
 205         .num_resources  = ARRAY_SIZE(rt3883_ehci_resources),
 206         .dev            = {
 207                 .dma_mask               = &rt3883_ehci_dmamask,
 208                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 209                 .platform_data          = &rt3883_ehci_data,
 210         },
 211 };
 212
 213 static struct resource rt3883_ohci_resources[] = {
 214         {
 215                 .start  = RT3883_OHCI_BASE,
 216                 .end    = RT3883_OHCI_BASE + PAGE_SIZE - 1,
 217                 .flags  = IORESOURCE_MEM,
 218         }, {
 219                 .start  = RT3883_INTC_IRQ_UHST,
 220                 .end    = RT3883_INTC_IRQ_UHST,
 221                 .flags  = IORESOURCE_IRQ,
 222         },
 223 };
 224
 225 static struct rt3883_ohci_platform_data rt3883_ohci_data = {
 226         .start_hw       = rt3883_usb_host_start,
 227         .stop_hw        = rt3883_usb_host_stop,
 228 };
 229
 230 static u64 rt3883_ohci_dmamask = DMA_BIT_MASK(32);
 231 static struct platform_device rt3883_ohci_device = {
 232         .name           = "rt3883-ohci",
 233         .id             = -1,
 234         .resource       = rt3883_ohci_resources,
 235         .num_resources  = ARRAY_SIZE(rt3883_ohci_resources),
 236         .dev            = {
 237                 .dma_mask               = &rt3883_ohci_dmamask,
 238                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 239                 .platform_data          = &rt3883_ohci_data,
 240         },
 241 };
 242
 243 void __init rt3883_register_usbhost(void)
 244 {
 245         platform_device_register(&rt3883_ehci_device);
 246         platform_device_register(&rt3883_ohci_device);
 247 }
 248
 249 static void rt3883_fe_reset(void)
 250 {
 251         u32 t;
 252
 253         t = rt3883_sysc_rr(RT3883_SYSC_REG_RSTCTRL);
 254         t |= RT3883_RSTCTRL_FE;
 255         rt3883_sysc_wr(t , RT3883_SYSC_REG_RSTCTRL);
 256
 257         t &= ~RT3883_RSTCTRL_FE;
 258         rt3883_sysc_wr(t, RT3883_SYSC_REG_RSTCTRL);
 259 }
 260
 261 static struct resource rt3883_eth_resources[] = {
 262         {
 263                 .start  = RT3883_FE_BASE,
 264                 .end    = RT3883_FE_BASE + PAGE_SIZE - 1,
 265                 .flags  = IORESOURCE_MEM,
 266         }, {
 267                 .start  = RT3883_CPU_IRQ_FE,
 268                 .end    = RT3883_CPU_IRQ_FE,
 269                 .flags  = IORESOURCE_IRQ,
 270         },
 271 };
 272
 273 struct ramips_eth_platform_data rt3883_eth_data = {
 274         .mac            = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55 },
 275         .reset_fe       = rt3883_fe_reset,
 276         .min_pkt_len    = 64,
 277 };
 278
 279 static struct platform_device rt3883_eth_device = {
 280         .name           = "ramips_eth",
 281         .resource       = rt3883_eth_resources,
 282         .num_resources  = ARRAY_SIZE(rt3883_eth_resources),
 283         .dev = {
 284                 .platform_data = &rt3883_eth_data,
 285         }
 286 };
 287
 288 void __init rt3883_register_ethernet(void)
 289 {
 290         struct clk *clk;
 291
 292         clk = clk_get(NULL, "sys");
 293         if (IS_ERR(clk))
 294                 panic("unable to get SYS clock, err=%ld", PTR_ERR(clk));
 295
 296         rt3883_eth_data.sys_freq = clk_get_rate(clk);
 297
 298         platform_device_register(&rt3883_eth_device);
 299 }
 300
 301 static struct resource rt3883_wlan_resources[] = {
 302         {
 303                 .start  = RT3883_WLAN_BASE,
 304                 .end    = RT3883_WLAN_BASE + 0x3FFFF,
 305                 .flags  = IORESOURCE_MEM,
 306         }, {
 307                 .start  = RT3883_CPU_IRQ_WLAN,
 308                 .end    = RT3883_CPU_IRQ_WLAN,
 309                 .flags  = IORESOURCE_IRQ,
 310         },
 311 };
 312
 313 static struct rt2x00_platform_data rt3883_wlan_data = {
 314         .eeprom_file_name       = "rt3883.eeprom",
 315 };
 316
 317 static struct platform_device rt3883_wlan_device = {
 318         .name           = "rt2800_wmac",
 319         .resource       = rt3883_wlan_resources,
 320         .num_resources  = ARRAY_SIZE(rt3883_wlan_resources),
 321         .dev = {
 322                 .platform_data = &rt3883_wlan_data,
 323         }
 324 };
 325
 326 void __init rt3883_register_wlan(void)
 327 {
 328         platform_device_register(&rt3883_wlan_device);
 329 }
 330
 331 static struct resource rt3883_wdt_resources[] = {
 332         {
 333                 .start  = RT3883_TIMER_BASE,
 334                 .end    = RT3883_TIMER_BASE + RT3883_TIMER_SIZE - 1,
 335                 .flags  = IORESOURCE_MEM,
 336         },
 337 };
 338
 339 static struct platform_device rt3883_wdt_device = {
 340         .name           = "ramips-wdt",
 341         .id             = -1,
 342         .resource       = rt3883_wdt_resources,
 343         .num_resources  = ARRAY_SIZE(rt3883_wdt_resources),
 344 };
 345
 346 void __init rt3883_register_wdt(bool enable_reset)
 347 {
 348         if (enable_reset) {
 349                 u32 t;
 350
 351                 /* enable WDT reset output on GPIO 2 */
 352                 t = rt3883_sysc_rr(RT3883_SYSC_REG_SYSCFG1);
 353                 t |= RT3883_SYSCFG1_GPIO2_AS_WDT_OUT;
 354                 rt3883_sysc_wr(t, RT3883_SYSC_REG_SYSCFG1);
 355         }
 356
 357         platform_device_register(&rt3883_wdt_device);
 358 }
 359
 360 static struct resource rt3883_nand_resources[] = {
 361         {
 362                 .flags  = IORESOURCE_MEM,
 363                 .start  = RT3883_NANDC_BASE,
 364                 .end    = RT3883_NANDC_BASE + RT3883_NANDC_SIZE - 1,
 365         },
 366 };
 367
 368 static struct ramips_nand_platform_data rt3883_nand_data;
 369
 370 static struct platform_device rt3883_nand_device = {
 371         .name           = RAMIPS_NAND_DRIVER_NAME,
 372         .id             = -1,
 373         .resource       = rt3883_nand_resources,
 374         .num_resources  = ARRAY_SIZE(rt3883_nand_resources),
 375         .dev    = {
 376                 .platform_data = &rt3883_nand_data,
 377         },
 378 };
 379
 380 void __init rt3883_register_nand(struct mtd_partition *parts, int nr_parts)
 381 {
 382         rt3883_nand_data.parts = parts;
 383         rt3883_nand_data.nr_parts = nr_parts;
 384         platform_device_register(&rt3883_nand_device);
 385 }