hw/z2.c

   1 /*
   2  * PXA270-based Zipit Z2 device
   3  *
   4  * Copyright (c) 2011 by Vasily Khoruzhick <anarsoul@gmail.com>
   5  *
   6  * Code is based on mainstone platform.
   7  *
   8  * This code is licensed under the GNU GPL v2.
   9  */
  10
  11 #include "hw.h"
  12 #include "pxa.h"
  13 #include "arm-misc.h"
  14 #include "devices.h"
  15 #include "i2c.h"
  16 #include "ssi.h"
  17 #include "boards.h"
  18 #include "sysemu.h"
  19 #include "flash.h"
  20 #include "blockdev.h"
  21 #include "console.h"
  22 #include "audio/audio.h"
  23 #include "exec-memory.h"
  24
  25 #ifdef DEBUG_Z2
  26 #define DPRINTF(fmt, ...) \
  27         printf(fmt, ## __VA_ARGS__)
  28 #else
  29 #define DPRINTF(fmt, ...)
  30 #endif
  31
  32 static struct keymap map[0x100] = {
  33     [0 ... 0xff] = { -1, -1 },
  34     [0x3b] = {0, 0}, /* Option = F1 */
  35     [0xc8] = {0, 1}, /* Up */
  36     [0xd0] = {0, 2}, /* Down */
  37     [0xcb] = {0, 3}, /* Left */
  38     [0xcd] = {0, 4}, /* Right */
  39     [0xcf] = {0, 5}, /* End */
  40     [0x0d] = {0, 6}, /* KPPLUS */
  41     [0xc7] = {1, 0}, /* Home */
  42     [0x10] = {1, 1}, /* Q */
  43     [0x17] = {1, 2}, /* I */
  44     [0x22] = {1, 3}, /* G */
  45     [0x2d] = {1, 4}, /* X */
  46     [0x1c] = {1, 5}, /* Enter */
  47     [0x0c] = {1, 6}, /* KPMINUS */
  48     [0xc9] = {2, 0}, /* PageUp */
  49     [0x11] = {2, 1}, /* W */
  50     [0x18] = {2, 2}, /* O */
  51     [0x23] = {2, 3}, /* H */
  52     [0x2e] = {2, 4}, /* C */
  53     [0x38] = {2, 5}, /* LeftAlt */
  54     [0xd1] = {3, 0}, /* PageDown */
  55     [0x12] = {3, 1}, /* E */
  56     [0x19] = {3, 2}, /* P */
  57     [0x24] = {3, 3}, /* J */
  58     [0x2f] = {3, 4}, /* V */
  59     [0x2a] = {3, 5}, /* LeftShift */
  60     [0x01] = {4, 0}, /* Esc */
  61     [0x13] = {4, 1}, /* R */
  62     [0x1e] = {4, 2}, /* A */
  63     [0x25] = {4, 3}, /* K */
  64     [0x30] = {4, 4}, /* B */
  65     [0x1d] = {4, 5}, /* LeftCtrl */
  66     [0x0f] = {5, 0}, /* Tab */
  67     [0x14] = {5, 1}, /* T */
  68     [0x1f] = {5, 2}, /* S */
  69     [0x26] = {5, 3}, /* L */
  70     [0x31] = {5, 4}, /* N */
  71     [0x39] = {5, 5}, /* Space */
  72     [0x3c] = {6, 0}, /* Stop = F2 */
  73     [0x15] = {6, 1}, /* Y */
  74     [0x20] = {6, 2}, /* D */
  75     [0x0e] = {6, 3}, /* Backspace */
  76     [0x32] = {6, 4}, /* M */
  77     [0x33] = {6, 5}, /* Comma */
  78     [0x3d] = {7, 0}, /* Play = F3 */
  79     [0x16] = {7, 1}, /* U */
  80     [0x21] = {7, 2}, /* F */
  81     [0x2c] = {7, 3}, /* Z */
  82     [0x27] = {7, 4}, /* Semicolon */
  83     [0x34] = {7, 5}, /* Dot */
  84 };
  85
  86 #define Z2_RAM_SIZE     0x02000000
  87 #define Z2_FLASH_BASE   0x00000000
  88 #define Z2_FLASH_SIZE   0x00800000
  89
  90 static struct arm_boot_info z2_binfo = {
  91     .loader_start   = PXA2XX_SDRAM_BASE,
  92     .ram_size       = Z2_RAM_SIZE,
  93 };
  94
  95 #define Z2_GPIO_SD_DETECT   96
  96 #define Z2_GPIO_AC_IN       0
  97 #define Z2_GPIO_KEY_ON      1
  98 #define Z2_GPIO_LCD_CS      88
  99
 100 typedef struct {
 101     SSISlave ssidev;
 102     int32_t selected;
 103     int32_t enabled;
 104     uint8_t buf[3];
 105     uint32_t cur_reg;
 106     int pos;
 107 } ZipitLCD;
 108
 109 static uint32_t zipit_lcd_transfer(SSISlave *dev, uint32_t value)
 110 {
 111     ZipitLCD *z = FROM_SSI_SLAVE(ZipitLCD, dev);
 112     uint16_t val;
 113     if (z->selected) {
 114         z->buf[z->pos] = value & 0xff;
 115         z->pos++;
 116     }
 117     if (z->pos == 3) {
 118         switch (z->buf[0]) {
 119         case 0x74:
 120             DPRINTF("%s: reg: 0x%.2x\n", __func__, z->buf[2]);
 121             z->cur_reg = z->buf[2];
 122             break;
 123         case 0x76:
 124             val = z->buf[1] << 8 | z->buf[2];
 125             DPRINTF("%s: value: 0x%.4x\n", __func__, val);
 126             if (z->cur_reg == 0x22 && val == 0x0000) {
 127                 z->enabled = 1;
 128                 printf("%s: LCD enabled\n", __func__);
 129             } else if (z->cur_reg == 0x10 && val == 0x0000) {
 130                 z->enabled = 0;
 131                 printf("%s: LCD disabled\n", __func__);
 132             }
 133             break;
 134         default:
 135             DPRINTF("%s: unknown command!\n", __func__);
 136             break;
 137         }
 138         z->pos = 0;
 139     }
 140     return 0;
 141 }
 142
 143 static void z2_lcd_cs(void *opaque, int line, int level)
 144 {
 145     ZipitLCD *z2_lcd = opaque;
 146     z2_lcd->selected = !level;
 147 }
 148
 149 static int zipit_lcd_init(SSISlave *dev)
 150 {
 151     ZipitLCD *z = FROM_SSI_SLAVE(ZipitLCD, dev);
 152     z->selected = 0;
 153     z->enabled = 0;
 154     z->pos = 0;
 155
 156     return 0;
 157 }
 158
 159 static VMStateDescription vmstate_zipit_lcd_state = {
 160     .name = "zipit-lcd",
 161     .version_id = 1,
 162     .minimum_version_id = 1,
 163     .minimum_version_id_old = 1,
 164     .fields = (VMStateField[]) {
 165         VMSTATE_INT32(selected, ZipitLCD),
 166         VMSTATE_INT32(enabled, ZipitLCD),
 167         VMSTATE_BUFFER(buf, ZipitLCD),
 168         VMSTATE_UINT32(cur_reg, ZipitLCD),
 169         VMSTATE_INT32(pos, ZipitLCD),
 170         VMSTATE_END_OF_LIST(),
 171     }
 172 };
 173
 174 static SSISlaveInfo zipit_lcd_info = {
 175     .qdev.name = "zipit-lcd",
 176     .qdev.size = sizeof(ZipitLCD),
 177     .qdev.vmsd = &vmstate_zipit_lcd_state,
 178     .init = zipit_lcd_init,
 179     .transfer = zipit_lcd_transfer
 180 };
 181
 182 typedef struct {
 183     i2c_slave i2c;
 184     int len;
 185     uint8_t buf[3];
 186 } AER915State;
 187
 188 static int aer915_send(i2c_slave *i2c, uint8_t data)
 189 {
 190     AER915State *s = FROM_I2C_SLAVE(AER915State, i2c);
 191     s->buf[s->len] = data;
 192     if (s->len++ > 2) {
 193         DPRINTF("%s: message too long (%i bytes)\n",
 194             __func__, s->len);
 195         return 1;
 196     }
 197
 198     if (s->len == 2) {
 199         DPRINTF("%s: reg %d value 0x%02x\n", __func__,
 200                 s->buf[0], s->buf[1]);
 201     }
 202
 203     return 0;
 204 }
 205
 206 static void aer915_event(i2c_slave *i2c, enum i2c_event event)
 207 {
 208     AER915State *s = FROM_I2C_SLAVE(AER915State, i2c);
 209     switch (event) {
 210     case I2C_START_SEND:
 211         s->len = 0;
 212         break;
 213     case I2C_START_RECV:
 214         if (s->len != 1) {
 215             DPRINTF("%s: short message!?\n", __func__);
 216         }
 217         break;
 218     case I2C_FINISH:
 219         break;
 220     default:
 221         break;
 222     }
 223 }
 224
 225 static int aer915_recv(i2c_slave *slave)
 226 {
 227     int retval = 0x00;
 228     AER915State *s = FROM_I2C_SLAVE(AER915State, slave);
 229
 230     switch (s->buf[0]) {
 231     /* Return hardcoded battery voltage,
 232      * 0xf0 means ~4.1V
 233      */
 234     case 0x02:
 235         retval = 0xf0;
 236         break;
 237     /* Return 0x00 for other regs,
 238      * we don't know what they are for,
 239      * anyway they return 0x00 on real hardware.
 240      */
 241     default:
 242         break;
 243     }
 244
 245     return retval;
 246 }
 247
 248 static int aer915_init(i2c_slave *i2c)
 249 {
 250     /* Nothing to do.  */
 251     return 0;
 252 }
 253
 254 static VMStateDescription vmstate_aer915_state = {
 255     .name = "aer915",
 256     .version_id = 1,
 257     .minimum_version_id = 1,
 258     .minimum_version_id_old = 1,
 259     .fields = (VMStateField[]) {
 260         VMSTATE_INT32(len, AER915State),
 261         VMSTATE_BUFFER(buf, AER915State),
 262         VMSTATE_END_OF_LIST(),
 263     }
 264 };
 265
 266 static I2CSlaveInfo aer915_info = {
 267     .qdev.name = "aer915",
 268     .qdev.size = sizeof(AER915State),
 269     .qdev.vmsd = &vmstate_aer915_state,
 270     .init = aer915_init,
 271     .event = aer915_event,
 272     .recv = aer915_recv,
 273     .send = aer915_send
 274 };
 275
 276 static void z2_init(ram_addr_t ram_size,
 277                 const char *boot_device,
 278                 const char *kernel_filename, const char *kernel_cmdline,
 279                 const char *initrd_filename, const char *cpu_model)
 280 {
 281     MemoryRegion *address_space_mem = get_system_memory();
 282     uint32_t sector_len = 0x10000;
 283     PXA2xxState *cpu;
 284     DriveInfo *dinfo;
 285     int be;
 286     void *z2_lcd;
 287     i2c_bus *bus;
 288     DeviceState *wm;
 289
 290     if (!cpu_model) {
 291         cpu_model = "pxa270-c5";
 292     }
 293
 294     /* Setup CPU & memory */
 295     cpu = pxa270_init(address_space_mem, z2_binfo.ram_size, cpu_model);
 296
 297 #ifdef TARGET_WORDS_BIGENDIAN
 298     be = 1;
 299 #else
 300     be = 0;
 301 #endif
 302     dinfo = drive_get(IF_PFLASH, 0, 0);
 303     if (!dinfo) {
 304         fprintf(stderr, "Flash image must be given with the "
 305                 "'pflash' parameter\n");
 306         exit(1);
 307     }
 308
 309     if (!pflash_cfi01_register(Z2_FLASH_BASE,
 310                                NULL, "z2.flash0", Z2_FLASH_SIZE,
 311                                dinfo->bdrv, sector_len,
 312                                Z2_FLASH_SIZE / sector_len, 4, 0, 0, 0, 0,
 313                                be)) {
 314         fprintf(stderr, "qemu: Error registering flash memory.\n");
 315         exit(1);
 316     }
 317
 318     /* setup keypad */
 319     pxa27x_register_keypad(cpu->kp, map, 0x100);
 320
 321     /* MMC/SD host */
 322     pxa2xx_mmci_handlers(cpu->mmc,
 323         NULL,
 324         qdev_get_gpio_in(cpu->gpio, Z2_GPIO_SD_DETECT));
 325
 326     ssi_register_slave(&zipit_lcd_info);
 327     i2c_register_slave(&aer915_info);
 328     z2_lcd = ssi_create_slave(cpu->ssp[1], "zipit-lcd");
 329     bus = pxa2xx_i2c_bus(cpu->i2c[0]);
 330     i2c_create_slave(bus, "aer915", 0x55);
 331     wm = i2c_create_slave(bus, "wm8750", 0x1b);
 332     cpu->i2s->opaque = wm;
 333     cpu->i2s->codec_out = wm8750_dac_dat;
 334     cpu->i2s->codec_in = wm8750_adc_dat;
 335     wm8750_data_req_set(wm, cpu->i2s->data_req, cpu->i2s);
 336
 337     qdev_connect_gpio_out(cpu->gpio, Z2_GPIO_LCD_CS,
 338         qemu_allocate_irqs(z2_lcd_cs, z2_lcd, 1)[0]);
 339
 340     if (kernel_filename) {
 341         z2_binfo.kernel_filename = kernel_filename;
 342         z2_binfo.kernel_cmdline = kernel_cmdline;
 343         z2_binfo.initrd_filename = initrd_filename;
 344         z2_binfo.board_id = 0x6dd;
 345         arm_load_kernel(cpu->env, &z2_binfo);
 346     }
 347 }
 348
 349 static QEMUMachine z2_machine = {
 350     .name = "z2",
 351     .desc = "Zipit Z2 (PXA27x)",
 352     .init = z2_init,
 353 };
 354
 355 static void z2_machine_init(void)
 356 {
 357     qemu_register_machine(&z2_machine);
 358 }
 359
 360 machine_init(z2_machine_init);