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