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         if (alchemy_get_cputype() == ALCHEMY_CPU_AU1300)
  40                 alchemy_uart_putchar(AU1300_UART2_PHYS_ADDR, c);
  41         else
  42                 alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
  43 }
  44
  45
  46 static struct platform_device db1x00_rtc_dev = {
  47         .name   = "rtc-au1xxx",
  48         .id     = -1,
  49 };
  50
  51
  52 static void db1x_power_off(void)
  53 {
  54         bcsr_write(BCSR_RESETS, 0);
  55         bcsr_write(BCSR_SYSTEM, BCSR_SYSTEM_PWROFF | BCSR_SYSTEM_RESET);
  56 }
  57
  58 static void db1x_reset(char *c)
  59 {
  60         bcsr_write(BCSR_RESETS, 0);
  61         bcsr_write(BCSR_SYSTEM, 0);
  62 }
  63
  64 static int __init db1x_late_setup(void)
  65 {
  66         if (!pm_power_off)
  67                 pm_power_off = db1x_power_off;
  68         if (!_machine_halt)
  69                 _machine_halt = db1x_power_off;
  70         if (!_machine_restart)
  71                 _machine_restart = db1x_reset;
  72
  73         platform_device_register(&db1x00_rtc_dev);
  74
  75         return 0;
  76 }
  77 device_initcall(db1x_late_setup);
  78
  79 /* register a pcmcia socket */
  80 int __init db1x_register_pcmcia_socket(phys_addr_t pcmcia_attr_start,
  81                                        phys_addr_t pcmcia_attr_end,
  82                                        phys_addr_t pcmcia_mem_start,
  83                                        phys_addr_t pcmcia_mem_end,
  84                                        phys_addr_t pcmcia_io_start,
  85                                        phys_addr_t pcmcia_io_end,
  86                                        int card_irq,
  87                                        int cd_irq,
  88                                        int stschg_irq,
  89                                        int eject_irq,
  90                                        int id)
  91 {
  92         int cnt, i, ret;
  93         struct resource *sr;
  94         struct platform_device *pd;
  95
  96         cnt = 5;
  97         if (eject_irq)
  98                 cnt++;
  99         if (stschg_irq)
 100                 cnt++;
 101
 102         sr = kzalloc(sizeof(struct resource) * cnt, GFP_KERNEL);
 103         if (!sr)
 104                 return -ENOMEM;
 105
 106         pd = platform_device_alloc("db1xxx_pcmcia", id);
 107         if (!pd) {
 108                 ret = -ENOMEM;
 109                 goto out;
 110         }
 111
 112         sr[0].name      = "pcmcia-attr";
 113         sr[0].flags     = IORESOURCE_MEM;
 114         sr[0].start     = pcmcia_attr_start;
 115         sr[0].end       = pcmcia_attr_end;
 116
 117         sr[1].name      = "pcmcia-mem";
 118         sr[1].flags     = IORESOURCE_MEM;
 119         sr[1].start     = pcmcia_mem_start;
 120         sr[1].end       = pcmcia_mem_end;
 121
 122         sr[2].name      = "pcmcia-io";
 123         sr[2].flags     = IORESOURCE_MEM;
 124         sr[2].start     = pcmcia_io_start;
 125         sr[2].end       = pcmcia_io_end;
 126
 127         sr[3].name      = "insert";
 128         sr[3].flags     = IORESOURCE_IRQ;
 129         sr[3].start = sr[3].end = cd_irq;
 130
 131         sr[4].name      = "card";
 132         sr[4].flags     = IORESOURCE_IRQ;
 133         sr[4].start = sr[4].end = card_irq;
 134
 135         i = 5;
 136         if (stschg_irq) {
 137                 sr[i].name      = "stschg";
 138                 sr[i].flags     = IORESOURCE_IRQ;
 139                 sr[i].start = sr[i].end = stschg_irq;
 140                 i++;
 141         }
 142         if (eject_irq) {
 143                 sr[i].name      = "eject";
 144                 sr[i].flags     = IORESOURCE_IRQ;
 145                 sr[i].start = sr[i].end = eject_irq;
 146         }
 147
 148         pd->resource = sr;
 149         pd->num_resources = cnt;
 150
 151         ret = platform_device_add(pd);
 152         if (!ret)
 153                 return 0;
 154
 155         platform_device_put(pd);
 156 out:
 157         kfree(sr);
 158         return ret;
 159 }
 160
 161 #define YAMON_SIZE      0x00100000
 162 #define YAMON_ENV_SIZE  0x00040000
 163
 164 int __init db1x_register_norflash(unsigned long size, int width,
 165                                   int swapped)
 166 {
 167         struct physmap_flash_data *pfd;
 168         struct platform_device *pd;
 169         struct mtd_partition *parts;
 170         struct resource *res;
 171         int ret, i;
 172
 173         if (size < (8 * 1024 * 1024))
 174                 return -EINVAL;
 175
 176         ret = -ENOMEM;
 177         parts = kzalloc(sizeof(struct mtd_partition) * 5, GFP_KERNEL);
 178         if (!parts)
 179                 goto out;
 180
 181         res = kzalloc(sizeof(struct resource), GFP_KERNEL);
 182         if (!res)
 183                 goto out1;
 184
 185         pfd = kzalloc(sizeof(struct physmap_flash_data), GFP_KERNEL);
 186         if (!pfd)
 187                 goto out2;
 188
 189         pd = platform_device_alloc("physmap-flash", 0);
 190         if (!pd)
 191                 goto out3;
 192
 193         /* NOR flash ends at 0x20000000, regardless of size */
 194         res->start = 0x20000000 - size;
 195         res->end = 0x20000000 - 1;
 196         res->flags = IORESOURCE_MEM;
 197
 198         /* partition setup.  Most Develboards have a switch which allows
 199          * to swap the physical locations of the 2 NOR flash banks.
 200          */
 201         i = 0;
 202         if (!swapped) {
 203                 /* first NOR chip */
 204                 parts[i].offset = 0;
 205                 parts[i].name = "User FS";
 206                 parts[i].size = size / 2;
 207                 i++;
 208         }
 209
 210         parts[i].offset = MTDPART_OFS_APPEND;
 211         parts[i].name = "User FS 2";
 212         parts[i].size = (size / 2) - (0x20000000 - 0x1fc00000);
 213         i++;
 214
 215         parts[i].offset = MTDPART_OFS_APPEND;
 216         parts[i].name = "YAMON";
 217         parts[i].size = YAMON_SIZE;
 218         parts[i].mask_flags = MTD_WRITEABLE;
 219         i++;
 220
 221         parts[i].offset = MTDPART_OFS_APPEND;
 222         parts[i].name = "raw kernel";
 223         parts[i].size = 0x00400000 - YAMON_SIZE - YAMON_ENV_SIZE;
 224         i++;
 225
 226         parts[i].offset = MTDPART_OFS_APPEND;
 227         parts[i].name = "YAMON Env";
 228         parts[i].size = YAMON_ENV_SIZE;
 229         parts[i].mask_flags = MTD_WRITEABLE;
 230         i++;
 231
 232         if (swapped) {
 233                 parts[i].offset = MTDPART_OFS_APPEND;
 234                 parts[i].name = "User FS";
 235                 parts[i].size = size / 2;
 236                 i++;
 237         }
 238
 239         pfd->width = width;
 240         pfd->parts = parts;
 241         pfd->nr_parts = 5;
 242
 243         pd->dev.platform_data = pfd;
 244         pd->resource = res;
 245         pd->num_resources = 1;
 246
 247         ret = platform_device_add(pd);
 248         if (!ret)
 249                 return ret;
 250
 251         platform_device_put(pd);
 252 out3:
 253         kfree(pfd);
 254 out2:
 255         kfree(res);
 256 out1:
 257         kfree(parts);
 258 out:
 259         return ret;
 260 }