arch/mips/alchemy/devboards/platform.c

   1 /*
   2  * devoard misc stuff.
   3  */
   4
   5 #include <linux/init.h>
   6 #include <linux/mtd/mtd.h>
   7 #include <linux/mtd/map.h>
   8 #include <linux/mtd/physmap.h>
   9 #include <linux/slab.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/pm.h>
  12
  13 #include <asm/bootinfo.h>
  14 #include <asm/reboot.h>
  15 #include <asm/mach-au1x00/au1000.h>
  16 #include <asm/mach-db1x00/bcsr.h>
  17
  18 #include <prom.h>
  19
  20 void __init prom_init(void)
  21 {
  22         unsigned char *memsize_str;
  23         unsigned long memsize;
  24
  25         prom_argc = (int)fw_arg0;
  26         prom_argv = (char **)fw_arg1;
  27         prom_envp = (char **)fw_arg2;
  28
  29         prom_init_cmdline();
  30         memsize_str = prom_getenv("memsize");
  31         if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
  32                 memsize = 64 << 20; /* all devboards have at least 64MB RAM */
  33
  34         add_memory_region(0, memsize, BOOT_MEM_RAM);
  35 }
  36
  37 void prom_putchar(unsigned char c)
  38 {
  39 #ifdef CONFIG_MIPS_DB1300
  40         alchemy_uart_putchar(AU1300_UART2_PHYS_ADDR, c);
  41 #else
  42         alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
  43 #endif
  44 }
  45
  46
  47 static struct platform_device db1x00_rtc_dev = {
  48         .name   = "rtc-au1xxx",
  49         .id     = -1,
  50 };
  51
  52
  53 static void db1x_power_off(void)
  54 {
  55         bcsr_write(BCSR_RESETS, 0);
  56         bcsr_write(BCSR_SYSTEM, BCSR_SYSTEM_PWROFF | BCSR_SYSTEM_RESET);
  57 }
  58
  59 static void db1x_reset(char *c)
  60 {
  61         bcsr_write(BCSR_RESETS, 0);
  62         bcsr_write(BCSR_SYSTEM, 0);
  63 }
  64
  65 static int __init db1x_late_setup(void)
  66 {
  67         if (!pm_power_off)
  68                 pm_power_off = db1x_power_off;
  69         if (!_machine_halt)
  70                 _machine_halt = db1x_power_off;
  71         if (!_machine_restart)
  72                 _machine_restart = db1x_reset;
  73
  74         platform_device_register(&db1x00_rtc_dev);
  75
  76         return 0;
  77 }
  78 device_initcall(db1x_late_setup);
  79
  80 /* register a pcmcia socket */
  81 int __init db1x_register_pcmcia_socket(phys_addr_t pcmcia_attr_start,
  82                                        phys_addr_t pcmcia_attr_end,
  83                                        phys_addr_t pcmcia_mem_start,
  84                                        phys_addr_t pcmcia_mem_end,
  85                                        phys_addr_t pcmcia_io_start,
  86                                        phys_addr_t pcmcia_io_end,
  87                                        int card_irq,
  88                                        int cd_irq,
  89                                        int stschg_irq,
  90                                        int eject_irq,
  91                                        int id)
  92 {
  93         int cnt, i, ret;
  94         struct resource *sr;
  95         struct platform_device *pd;
  96
  97         cnt = 5;
  98         if (eject_irq)
  99                 cnt++;
 100         if (stschg_irq)
 101                 cnt++;
 102
 103         sr = kzalloc(sizeof(struct resource) * cnt, GFP_KERNEL);
 104         if (!sr)
 105                 return -ENOMEM;
 106
 107         pd = platform_device_alloc("db1xxx_pcmcia", id);
 108         if (!pd) {
 109                 ret = -ENOMEM;
 110                 goto out;
 111         }
 112
 113         sr[0].name      = "pcmcia-attr";
 114         sr[0].flags     = IORESOURCE_MEM;
 115         sr[0].start     = pcmcia_attr_start;
 116         sr[0].end       = pcmcia_attr_end;
 117
 118         sr[1].name      = "pcmcia-mem";
 119         sr[1].flags     = IORESOURCE_MEM;
 120         sr[1].start     = pcmcia_mem_start;
 121         sr[1].end       = pcmcia_mem_end;
 122
 123         sr[2].name      = "pcmcia-io";
 124         sr[2].flags     = IORESOURCE_MEM;
 125         sr[2].start     = pcmcia_io_start;
 126         sr[2].end       = pcmcia_io_end;
 127
 128         sr[3].name      = "insert";
 129         sr[3].flags     = IORESOURCE_IRQ;
 130         sr[3].start = sr[3].end = cd_irq;
 131
 132         sr[4].name      = "card";
 133         sr[4].flags     = IORESOURCE_IRQ;
 134         sr[4].start = sr[4].end = card_irq;
 135
 136         i = 5;
 137         if (stschg_irq) {
 138                 sr[i].name      = "stschg";
 139                 sr[i].flags     = IORESOURCE_IRQ;
 140                 sr[i].start = sr[i].end = stschg_irq;
 141                 i++;
 142         }
 143         if (eject_irq) {
 144                 sr[i].name      = "eject";
 145                 sr[i].flags     = IORESOURCE_IRQ;
 146                 sr[i].start = sr[i].end = eject_irq;
 147         }
 148
 149         pd->resource = sr;
 150         pd->num_resources = cnt;
 151
 152         ret = platform_device_add(pd);
 153         if (!ret)
 154                 return 0;
 155
 156         platform_device_put(pd);
 157 out:
 158         kfree(sr);
 159         return ret;
 160 }
 161
 162 #define YAMON_SIZE      0x00100000
 163 #define YAMON_ENV_SIZE  0x00040000
 164
 165 int __init db1x_register_norflash(unsigned long size, int width,
 166                                   int swapped)
 167 {
 168         struct physmap_flash_data *pfd;
 169         struct platform_device *pd;
 170         struct mtd_partition *parts;
 171         struct resource *res;
 172         int ret, i;
 173
 174         if (size < (8 * 1024 * 1024))
 175                 return -EINVAL;
 176
 177         ret = -ENOMEM;
 178         parts = kzalloc(sizeof(struct mtd_partition) * 5, GFP_KERNEL);
 179         if (!parts)
 180                 goto out;
 181
 182         res = kzalloc(sizeof(struct resource), GFP_KERNEL);
 183         if (!res)
 184                 goto out1;
 185
 186         pfd = kzalloc(sizeof(struct physmap_flash_data), GFP_KERNEL);
 187         if (!pfd)
 188                 goto out2;
 189
 190         pd = platform_device_alloc("physmap-flash", 0);
 191         if (!pd)
 192                 goto out3;
 193
 194         /* NOR flash ends at 0x20000000, regardless of size */
 195         res->start = 0x20000000 - size;
 196         res->end = 0x20000000 - 1;
 197         res->flags = IORESOURCE_MEM;
 198
 199         /* partition setup.  Most Develboards have a switch which allows
 200          * to swap the physical locations of the 2 NOR flash banks.
 201          */
 202         i = 0;
 203         if (!swapped) {
 204                 /* first NOR chip */
 205                 parts[i].offset = 0;
 206                 parts[i].name = "User FS";
 207                 parts[i].size = size / 2;
 208                 i++;
 209         }
 210
 211         parts[i].offset = MTDPART_OFS_APPEND;
 212         parts[i].name = "User FS 2";
 213         parts[i].size = (size / 2) - (0x20000000 - 0x1fc00000);
 214         i++;
 215
 216         parts[i].offset = MTDPART_OFS_APPEND;
 217         parts[i].name = "YAMON";
 218         parts[i].size = YAMON_SIZE;
 219         parts[i].mask_flags = MTD_WRITEABLE;
 220         i++;
 221
 222         parts[i].offset = MTDPART_OFS_APPEND;
 223         parts[i].name = "raw kernel";
 224         parts[i].size = 0x00400000 - YAMON_SIZE - YAMON_ENV_SIZE;
 225         i++;
 226
 227         parts[i].offset = MTDPART_OFS_APPEND;
 228         parts[i].name = "YAMON Env";
 229         parts[i].size = YAMON_ENV_SIZE;
 230         parts[i].mask_flags = MTD_WRITEABLE;
 231         i++;
 232
 233         if (swapped) {
 234                 parts[i].offset = MTDPART_OFS_APPEND;
 235                 parts[i].name = "User FS";
 236                 parts[i].size = size / 2;
 237                 i++;
 238         }
 239
 240         pfd->width = width;
 241         pfd->parts = parts;
 242         pfd->nr_parts = 5;
 243
 244         pd->dev.platform_data = pfd;
 245         pd->resource = res;
 246         pd->num_resources = 1;
 247
 248         ret = platform_device_add(pd);
 249         if (!ret)
 250                 return ret;
 251
 252         platform_device_put(pd);
 253 out3:
 254         kfree(pfd);
 255 out2:
 256         kfree(res);
 257 out1:
 258         kfree(parts);
 259 out:
 260         return ret;
 261 }