git.maemo.org Git - qemu/blob - hw/beagle.c

   1 /*
   2  * Beagle board emulation. http://beagleboard.org/
   3  *
   4  * Copyright (C) 2008 yajin(yajin@vm-kernel.org)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 or
   9  * (at your option) version 3 of the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  19  * MA 02111-1307 USA
  20  */
  21
  22 #include "qemu-common.h"
  23 #include "sysemu.h"
  24 #include "omap.h"
  25 #include "arm-misc.h"
  26 #include "irq.h"
  27 #include "console.h"
  28 #include "boards.h"
  29 #include "i2c.h"
  30 #include "devices.h"
  31 #include "flash.h"
  32 #include "hw.h"
  33 #include "block.h"
  34
  35 #define BEAGLE_NAND_CS                  0
  36
  37 #define GPMC_NOR             0
  38 #define GPMC_NAND           1
  39 #define GPMC_MDOC           2
  40 #define GPMC_ONENAND    3
  41 #define MMC_NAND            4
  42 #define MMC_ONENAND     5
  43
  44
  45 #define TST_DEVICE              0x0
  46 #define EMU_DEVICE              0x1
  47 #define HS_DEVICE               0x2
  48 #define GP_DEVICE               0x3
  49
  50 #define DEBUG_BEAGLE
  51
  52 #ifdef DEBUG_BEAGLE
  53 #define BEAGLE_DEBUG(...)    do { fprintf(stderr, __VA_ARGS__); } while(0)
  54 #else
  55 #define BEAGLE_DEBUG(x)
  56 #endif
  57
  58 /* Beagle board support */
  59 struct beagle_s {
  60     struct omap_mpu_state_s *cpu;
  61
  62     struct nand_bflash_s *nand;
  63     struct omap3_lcd_panel_s *lcd_panel;
  64     i2c_bus *i2c;
  65     struct twl4030_s *twl4030;
  66 };
  67
  68
  69
  70 static struct arm_boot_info beagle_binfo = {
  71     .ram_size = 0x08000000,
  72 };
  73
  74
  75 static uint32_t beagle_nand_read16(void *opaque, target_phys_addr_t addr)
  76 {
  77         struct beagle_s *s = (struct beagle_s *) opaque;
  78     //BEAGLE_DEBUG("beagle_nand_read16 offset %x\n",addr);
  79
  80         switch (addr)
  81         {
  82                 case 0x7C: /*NAND_COMMAND*/
  83                 case 0x80: /*NAND_ADDRESS*/
  84                         OMAP_BAD_REG(addr);
  85                         break;
  86                 case 0x84: /*NAND_DATA*/
  87                         return nandb_read_data16(s->nand);
  88                         break;
  89                 default:
  90                         OMAP_BAD_REG(addr);
  91                         break;
  92         }
  93     return 0;
  94 }
  95
  96 static void beagle_nand_write16(void *opaque, target_phys_addr_t addr,
  97                 uint32_t value)
  98 {
  99         struct beagle_s *s = (struct beagle_s *) opaque;
 100     switch (addr)
 101         {
 102                 case 0x7C: /*NAND_COMMAND*/
 103                         nandb_write_command(s->nand,value);
 104                         break;
 105                 case 0x80: /*NAND_ADDRESS*/
 106                         nandb_write_address(s->nand,value);
 107                         break;
 108                 case 0x84: /*NAND_DATA*/
 109                         nandb_write_data16(s->nand,value);
 110                         break;
 111                 default:
 112                         OMAP_BAD_REG(addr);
 113                         break;
 114         }
 115 }
 116
 117
 118 static CPUReadMemoryFunc *beagle_nand_readfn[] = {
 119         beagle_nand_read16,
 120         beagle_nand_read16,
 121         omap_badwidth_read32,
 122 };
 123
 124 static CPUWriteMemoryFunc *beagle_nand_writefn[] = {
 125         beagle_nand_write16,
 126         beagle_nand_write16,
 127         omap_badwidth_write32,
 128 };
 129
 130 static void beagle_nand_setup(struct beagle_s *s)
 131 {
 132         //int iomemtype;
 133
 134         /*MT29F2G16ABC*/
 135         s->nand = nandb_init(NAND_MFR_MICRON,0xba);
 136         /*wp=1, no write protect!!! */
 137         //nand_set_wp(s->nand, 1);
 138
 139 /*      iomemtype = cpu_register_io_memory(0, beagle_nand_readfn,
 140                     beagle_nand_writefn, s);
 141     cpu_register_physical_memory(0x6e00007c, 0xc, iomemtype);*/
 142     omap_gpmc_attach(s->cpu->gpmc, 0, 0, NULL, NULL, s, beagle_nand_readfn, beagle_nand_writefn);
 143
 144          /*BOOT from nand*/
 145     omap3_set_mem_type(s->cpu,GPMC_NAND);
 146
 147 }
 148
 149 static int beagle_nand_read_page(struct beagle_s *s,uint8_t *buf, uint16_t page_addr)
 150 {
 151         uint16_t *p;
 152         int i;
 153
 154         p=(uint16_t *)buf;
 155
 156         /*send command 0x0*/
 157         beagle_nand_write16(s,0x7C,0);
 158         /*send page address */
 159         beagle_nand_write16(s,0x80,page_addr&0xff);
 160         beagle_nand_write16(s,0x80,(page_addr>>8)&0x7);
 161         beagle_nand_write16(s,0x80,(page_addr>>11)&0xff);
 162         beagle_nand_write16(s,0x80,(page_addr>>19)&0xff);
 163         beagle_nand_write16(s,0x80,(page_addr>>27)&0xff);
 164         /*send command 0x30*/
 165         beagle_nand_write16(s,0x7C,0x30);
 166
 167         for (i=0;i<0x800/2;i++)
 168         {
 169                 *p++ = beagle_nand_read16(s,0x84);
 170         }
 171         return 1;
 172 }
 173
 174 /*read the xloader from NAND Flash into internal RAM*/
 175 static int beagle_boot_from_nand(struct beagle_s *s)
 176 {
 177         uint32_t        loadaddr, len;
 178         uint8_t nand_page[0x800],*load_dest;
 179         uint32_t nand_pages,i;
 180
 181         /* The first two words(8 bytes) in first nand flash page have special meaning.
 182                 First word:x-loader len
 183                 Second word: x-load address in internal ram */
 184         beagle_nand_read_page(s,nand_page,0);
 185         len = *((uint32_t*)nand_page);
 186         loadaddr =  *((uint32_t*)(nand_page+4));
 187         if ((len==0)||(loadaddr==0)||(len==0xffffffff)||(loadaddr==0xffffffff))
 188                 return (-1);
 189
 190         /*put the first page into internal ram*/
 191         load_dest = phys_ram_base +beagle_binfo.ram_size;
 192         load_dest += loadaddr-OMAP3_SRAM_BASE;
 193
 194         BEAGLE_DEBUG("load_dest %x phys_ram_base %x \n",(unsigned)load_dest,(unsigned)phys_ram_base);
 195
 196         memcpy(load_dest,nand_page+8,0x800-8);
 197         load_dest += 0x800-8;
 198
 199         nand_pages = len/0x800;
 200         if (len%0x800!=0)
 201                 nand_pages++;
 202
 203         for (i=1;i<nand_pages;i++)
 204         {
 205                 beagle_nand_read_page(s,nand_page,i*0x800);
 206                 memcpy(load_dest,nand_page,0x800);
 207                 load_dest += 0x800;
 208         }
 209         s->cpu->env->regs[15] = loadaddr;
 210         return 0;
 211
 212 }
 213
 214 static int beagle_rom_emu(struct beagle_s *s)
 215 {
 216     if (!omap3_mmc_boot(s->cpu))
 217         if (beagle_boot_from_nand(s) < 0)
 218             return -1;
 219         return 0;
 220 }
 221
 222 static void beagle_dss_setup(struct beagle_s *s)
 223 {
 224         s->lcd_panel = omap3_lcd_panel_init();
 225         omap3_lcd_panel_attach(s->cpu->dss, 0, s->lcd_panel);
 226         s->lcd_panel->dss = s->cpu->dss;
 227 }
 228
 229 static void beagle_mmc_cs_cb(void *opaque, int line, int level)
 230 {
 231     /* TODO: this seems to actually be connected to the menelaus, to
 232      * which also both MMC slots connect.  */
 233     omap_mmc_enable((struct omap_mmc_s *) opaque, !level);
 234
 235     printf("%s: MMC slot %i active\n", __FUNCTION__, level + 1);
 236 }
 237
 238 static void beagle_i2c_setup(struct beagle_s *s)
 239 {
 240     /* Attach the CPU on one end of our I2C bus.  */
 241     s->i2c = omap_i2c_bus(s->cpu->i2c[0]);
 242
 243     s->twl4030 = twl4030_init(s->i2c, s->cpu->irq[0][OMAP_INT_35XX_SYS_NIRQ]);
 244 }
 245
 246
 247 static void beagle_init(ram_addr_t ram_size, int vga_ram_size,
 248                 const char *boot_device,
 249                 const char *kernel_filename, const char *kernel_cmdline,
 250                 const char *initrd_filename, const char *cpu_model)
 251 {
 252     struct beagle_s *s = (struct beagle_s *) qemu_mallocz(sizeof(*s));
 253     int sdram_size = beagle_binfo.ram_size;
 254
 255         if (ram_size < sdram_size +  OMAP3530_SRAM_SIZE) {
 256         fprintf(stderr, "This architecture uses %i bytes of memory\n",
 257                         sdram_size + OMAP3530_SRAM_SIZE);
 258         exit(1);
 259     }
 260         s->cpu = omap3530_mpu_init(sdram_size, NULL);
 261         beagle_nand_setup(s);
 262         beagle_i2c_setup(s);
 263         beagle_dss_setup(s);
 264         omap3_set_device_type(s->cpu,GP_DEVICE);
 265     if (beagle_rom_emu(s) < 0) {
 266                 fprintf(stderr,"boot from MMC and nand failed \n");
 267                 exit(-1);
 268         }
 269 }
 270
 271
 272
 273 QEMUMachine beagle_machine = {
 274     .name = "beagle",
 275     .desc =     "Beagle board (OMAP3530)",
 276     .init =     beagle_init,
 277     .ram_require =     (0x08000000 +  OMAP3530_SRAM_SIZE) | RAMSIZE_FIXED,
 278 };
 279