arch/mips/alchemy/devboards/platform.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * devoard misc stuff.
   4  */
   5
   6 #include <linux/init.h>
   7 #include <linux/mtd/mtd.h>
   8 #include <linux/mtd/map.h>
   9 #include <linux/mtd/physmap.h>
  10 #include <linux/slab.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/pm.h>
  13
  14 #include <asm/bootinfo.h>
  15 #include <asm/idle.h>
  16 #include <asm/reboot.h>
  17 #include <asm/setup.h>
  18 #include <asm/mach-au1x00/au1000.h>
  19 #include <asm/mach-db1x00/bcsr.h>
  20
  21 #include <prom.h>
  22
  23 void prom_putchar(char c)
  24 {
  25         if (alchemy_get_cputype() == ALCHEMY_CPU_AU1300)
  26                 alchemy_uart_putchar(AU1300_UART2_PHYS_ADDR, c);
  27         else
  28                 alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
  29 }
  30
  31
  32 static struct platform_device db1x00_rtc_dev = {
  33         .name   = "rtc-au1xxx",
  34         .id     = -1,
  35 };
  36
  37
  38 static void db1x_power_off(void)
  39 {
  40         bcsr_write(BCSR_RESETS, 0);
  41         bcsr_write(BCSR_SYSTEM, BCSR_SYSTEM_PWROFF | BCSR_SYSTEM_RESET);
  42         while (1)               /* sit and spin */
  43                 cpu_wait();
  44 }
  45
  46 static void db1x_reset(char *c)
  47 {
  48         bcsr_write(BCSR_RESETS, 0);
  49         bcsr_write(BCSR_SYSTEM, 0);
  50 }
  51
  52 static int __init db1x_late_setup(void)
  53 {
  54         if (!pm_power_off)
  55                 pm_power_off = db1x_power_off;
  56         if (!_machine_halt)
  57                 _machine_halt = db1x_power_off;
  58         if (!_machine_restart)
  59                 _machine_restart = db1x_reset;
  60
  61         platform_device_register(&db1x00_rtc_dev);
  62
  63         return 0;
  64 }
  65 device_initcall(db1x_late_setup);
  66
  67 /* register a pcmcia socket */
  68 int __init db1x_register_pcmcia_socket(phys_addr_t pcmcia_attr_start,
  69                                        phys_addr_t pcmcia_attr_end,
  70                                        phys_addr_t pcmcia_mem_start,
  71                                        phys_addr_t pcmcia_mem_end,
  72                                        phys_addr_t pcmcia_io_start,
  73                                        phys_addr_t pcmcia_io_end,
  74                                        int card_irq,
  75                                        int cd_irq,
  76                                        int stschg_irq,
  77                                        int eject_irq,
  78                                        int id)
  79 {
  80         int cnt, i, ret;
  81         struct resource *sr;
  82         struct platform_device *pd;
  83
  84         cnt = 5;
  85         if (eject_irq)
  86                 cnt++;
  87         if (stschg_irq)
  88                 cnt++;
  89
  90         sr = kcalloc(cnt, sizeof(struct resource), GFP_KERNEL);
  91         if (!sr)
  92                 return -ENOMEM;
  93
  94         pd = platform_device_alloc("db1xxx_pcmcia", id);
  95         if (!pd) {
  96                 ret = -ENOMEM;
  97                 goto out;
  98         }
  99
 100         sr[0].name      = "pcmcia-attr";
 101         sr[0].flags     = IORESOURCE_MEM;
 102         sr[0].start     = pcmcia_attr_start;
 103         sr[0].end       = pcmcia_attr_end;
 104
 105         sr[1].name      = "pcmcia-mem";
 106         sr[1].flags     = IORESOURCE_MEM;
 107         sr[1].start     = pcmcia_mem_start;
 108         sr[1].end       = pcmcia_mem_end;
 109
 110         sr[2].name      = "pcmcia-io";
 111         sr[2].flags     = IORESOURCE_MEM;
 112         sr[2].start     = pcmcia_io_start;
 113         sr[2].end       = pcmcia_io_end;
 114
 115         sr[3].name      = "insert";
 116         sr[3].flags     = IORESOURCE_IRQ;
 117         sr[3].start = sr[3].end = cd_irq;
 118
 119         sr[4].name      = "card";
 120         sr[4].flags     = IORESOURCE_IRQ;
 121         sr[4].start = sr[4].end = card_irq;
 122
 123         i = 5;
 124         if (stschg_irq) {
 125                 sr[i].name      = "stschg";
 126                 sr[i].flags     = IORESOURCE_IRQ;
 127                 sr[i].start = sr[i].end = stschg_irq;
 128                 i++;
 129         }
 130         if (eject_irq) {
 131                 sr[i].name      = "eject";
 132                 sr[i].flags     = IORESOURCE_IRQ;
 133                 sr[i].start = sr[i].end = eject_irq;
 134         }
 135
 136         pd->resource = sr;
 137         pd->num_resources = cnt;
 138
 139         ret = platform_device_add(pd);
 140         if (!ret)
 141                 return 0;
 142
 143         platform_device_put(pd);
 144 out:
 145         kfree(sr);
 146         return ret;
 147 }
 148
 149 #define YAMON_SIZE      0x00100000
 150 #define YAMON_ENV_SIZE  0x00040000
 151
 152 int __init db1x_register_norflash(unsigned long size, int width,
 153                                   int swapped)
 154 {
 155         struct physmap_flash_data *pfd;
 156         struct platform_device *pd;
 157         struct mtd_partition *parts;
 158         struct resource *res;
 159         int ret, i;
 160
 161         if (size < (8 * 1024 * 1024))
 162                 return -EINVAL;
 163
 164         ret = -ENOMEM;
 165         parts = kcalloc(5, sizeof(struct mtd_partition), GFP_KERNEL);
 166         if (!parts)
 167                 goto out;
 168
 169         res = kzalloc(sizeof(struct resource), GFP_KERNEL);
 170         if (!res)
 171                 goto out1;
 172
 173         pfd = kzalloc(sizeof(struct physmap_flash_data), GFP_KERNEL);
 174         if (!pfd)
 175                 goto out2;
 176
 177         pd = platform_device_alloc("physmap-flash", 0);
 178         if (!pd)
 179                 goto out3;
 180
 181         /* NOR flash ends at 0x20000000, regardless of size */
 182         res->start = 0x20000000 - size;
 183         res->end = 0x20000000 - 1;
 184         res->flags = IORESOURCE_MEM;
 185
 186         /* partition setup.  Most Develboards have a switch which allows
 187          * to swap the physical locations of the 2 NOR flash banks.
 188          */
 189         i = 0;
 190         if (!swapped) {
 191                 /* first NOR chip */
 192                 parts[i].offset = 0;
 193                 parts[i].name = "User FS";
 194                 parts[i].size = size / 2;
 195                 i++;
 196         }
 197
 198         parts[i].offset = MTDPART_OFS_APPEND;
 199         parts[i].name = "User FS 2";
 200         parts[i].size = (size / 2) - (0x20000000 - 0x1fc00000);
 201         i++;
 202
 203         parts[i].offset = MTDPART_OFS_APPEND;
 204         parts[i].name = "YAMON";
 205         parts[i].size = YAMON_SIZE;
 206         parts[i].mask_flags = MTD_WRITEABLE;
 207         i++;
 208
 209         parts[i].offset = MTDPART_OFS_APPEND;
 210         parts[i].name = "raw kernel";
 211         parts[i].size = 0x00400000 - YAMON_SIZE - YAMON_ENV_SIZE;
 212         i++;
 213
 214         parts[i].offset = MTDPART_OFS_APPEND;
 215         parts[i].name = "YAMON Env";
 216         parts[i].size = YAMON_ENV_SIZE;
 217         parts[i].mask_flags = MTD_WRITEABLE;
 218         i++;
 219
 220         if (swapped) {
 221                 parts[i].offset = MTDPART_OFS_APPEND;
 222                 parts[i].name = "User FS";
 223                 parts[i].size = size / 2;
 224                 i++;
 225         }
 226
 227         pfd->width = width;
 228         pfd->parts = parts;
 229         pfd->nr_parts = 5;
 230
 231         pd->dev.platform_data = pfd;
 232         pd->resource = res;
 233         pd->num_resources = 1;
 234
 235         ret = platform_device_add(pd);
 236         if (!ret)
 237                 return ret;
 238
 239         platform_device_put(pd);
 240 out3:
 241         kfree(pfd);
 242 out2:
 243         kfree(res);
 244 out1:
 245         kfree(parts);
 246 out:
 247         return ret;
 248 }