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  * Contributions after 2012-01-13 are licensed under the terms of the
  11  * GNU GPL, version 2 or (at your option) any later version.
  12  */
  13
  14 #include "hw.h"
  15 #include "pxa.h"
  16 #include "arm-misc.h"
  17 #include "devices.h"
  18 #include "i2c.h"
  19 #include "ssi.h"
  20 #include "boards.h"
  21 #include "sysemu.h"
  22 #include "flash.h"
  23 #include "blockdev.h"
  24 #include "console.h"
  25 #include "audio/audio.h"
  26 #include "exec-memory.h"
  27
  28 #ifdef DEBUG_Z2
  29 #define DPRINTF(fmt, ...) \
  30         printf(fmt, ## __VA_ARGS__)
  31 #else
  32 #define DPRINTF(fmt, ...)
  33 #endif
  34
  35 static struct keymap map[0x100] = {
  36     [0 ... 0xff] = { -1, -1 },
  37     [0x3b] = {0, 0}, /* Option = F1 */
  38     [0xc8] = {0, 1}, /* Up */
  39     [0xd0] = {0, 2}, /* Down */
  40     [0xcb] = {0, 3}, /* Left */
  41     [0xcd] = {0, 4}, /* Right */
  42     [0xcf] = {0, 5}, /* End */
  43     [0x0d] = {0, 6}, /* KPPLUS */
  44     [0xc7] = {1, 0}, /* Home */
  45     [0x10] = {1, 1}, /* Q */
  46     [0x17] = {1, 2}, /* I */
  47     [0x22] = {1, 3}, /* G */
  48     [0x2d] = {1, 4}, /* X */
  49     [0x1c] = {1, 5}, /* Enter */
  50     [0x0c] = {1, 6}, /* KPMINUS */
  51     [0xc9] = {2, 0}, /* PageUp */
  52     [0x11] = {2, 1}, /* W */
  53     [0x18] = {2, 2}, /* O */
  54     [0x23] = {2, 3}, /* H */
  55     [0x2e] = {2, 4}, /* C */
  56     [0x38] = {2, 5}, /* LeftAlt */
  57     [0xd1] = {3, 0}, /* PageDown */
  58     [0x12] = {3, 1}, /* E */
  59     [0x19] = {3, 2}, /* P */
  60     [0x24] = {3, 3}, /* J */
  61     [0x2f] = {3, 4}, /* V */
  62     [0x2a] = {3, 5}, /* LeftShift */
  63     [0x01] = {4, 0}, /* Esc */
  64     [0x13] = {4, 1}, /* R */
  65     [0x1e] = {4, 2}, /* A */
  66     [0x25] = {4, 3}, /* K */
  67     [0x30] = {4, 4}, /* B */
  68     [0x1d] = {4, 5}, /* LeftCtrl */
  69     [0x0f] = {5, 0}, /* Tab */
  70     [0x14] = {5, 1}, /* T */
  71     [0x1f] = {5, 2}, /* S */
  72     [0x26] = {5, 3}, /* L */
  73     [0x31] = {5, 4}, /* N */
  74     [0x39] = {5, 5}, /* Space */
  75     [0x3c] = {6, 0}, /* Stop = F2 */
  76     [0x15] = {6, 1}, /* Y */
  77     [0x20] = {6, 2}, /* D */
  78     [0x0e] = {6, 3}, /* Backspace */
  79     [0x32] = {6, 4}, /* M */
  80     [0x33] = {6, 5}, /* Comma */
  81     [0x3d] = {7, 0}, /* Play = F3 */
  82     [0x16] = {7, 1}, /* U */
  83     [0x21] = {7, 2}, /* F */
  84     [0x2c] = {7, 3}, /* Z */
  85     [0x27] = {7, 4}, /* Semicolon */
  86     [0x34] = {7, 5}, /* Dot */
  87 };
  88
  89 #define Z2_RAM_SIZE     0x02000000
  90 #define Z2_FLASH_BASE   0x00000000
  91 #define Z2_FLASH_SIZE   0x00800000
  92
  93 static struct arm_boot_info z2_binfo = {
  94     .loader_start   = PXA2XX_SDRAM_BASE,
  95     .ram_size       = Z2_RAM_SIZE,
  96 };
  97
  98 #define Z2_GPIO_SD_DETECT   96
  99 #define Z2_GPIO_AC_IN       0
 100 #define Z2_GPIO_KEY_ON      1
 101 #define Z2_GPIO_LCD_CS      88
 102
 103 typedef struct {
 104     SSISlave ssidev;
 105     int32_t selected;
 106     int32_t enabled;
 107     uint8_t buf[3];
 108     uint32_t cur_reg;
 109     int pos;
 110 } ZipitLCD;
 111
 112 static uint32_t zipit_lcd_transfer(SSISlave *dev, uint32_t value)
 113 {
 114     ZipitLCD *z = FROM_SSI_SLAVE(ZipitLCD, dev);
 115     uint16_t val;
 116     if (z->selected) {
 117         z->buf[z->pos] = value & 0xff;
 118         z->pos++;
 119     }
 120     if (z->pos == 3) {
 121         switch (z->buf[0]) {
 122         case 0x74:
 123             DPRINTF("%s: reg: 0x%.2x\n", __func__, z->buf[2]);
 124             z->cur_reg = z->buf[2];
 125             break;
 126         case 0x76:
 127             val = z->buf[1] << 8 | z->buf[2];
 128             DPRINTF("%s: value: 0x%.4x\n", __func__, val);
 129             if (z->cur_reg == 0x22 && val == 0x0000) {
 130                 z->enabled = 1;
 131                 printf("%s: LCD enabled\n", __func__);
 132             } else if (z->cur_reg == 0x10 && val == 0x0000) {
 133                 z->enabled = 0;
 134                 printf("%s: LCD disabled\n", __func__);
 135             }
 136             break;
 137         default:
 138             DPRINTF("%s: unknown command!\n", __func__);
 139             break;
 140         }
 141         z->pos = 0;
 142     }
 143     return 0;
 144 }
 145
 146 static void z2_lcd_cs(void *opaque, int line, int level)
 147 {
 148     ZipitLCD *z2_lcd = opaque;
 149     z2_lcd->selected = !level;
 150 }
 151
 152 static int zipit_lcd_init(SSISlave *dev)
 153 {
 154     ZipitLCD *z = FROM_SSI_SLAVE(ZipitLCD, dev);
 155     z->selected = 0;
 156     z->enabled = 0;
 157     z->pos = 0;
 158
 159     return 0;
 160 }
 161
 162 static VMStateDescription vmstate_zipit_lcd_state = {
 163     .name = "zipit-lcd",
 164     .version_id = 1,
 165     .minimum_version_id = 1,
 166     .minimum_version_id_old = 1,
 167     .fields = (VMStateField[]) {
 168         VMSTATE_INT32(selected, ZipitLCD),
 169         VMSTATE_INT32(enabled, ZipitLCD),
 170         VMSTATE_BUFFER(buf, ZipitLCD),
 171         VMSTATE_UINT32(cur_reg, ZipitLCD),
 172         VMSTATE_INT32(pos, ZipitLCD),
 173         VMSTATE_END_OF_LIST(),
 174     }
 175 };
 176
 177 static SSISlaveInfo zipit_lcd_info = {
 178     .qdev.name = "zipit-lcd",
 179     .qdev.size = sizeof(ZipitLCD),
 180     .qdev.vmsd = &vmstate_zipit_lcd_state,
 181     .init = zipit_lcd_init,
 182     .transfer = zipit_lcd_transfer
 183 };
 184
 185 typedef struct {
 186     i2c_slave i2c;
 187     int len;
 188     uint8_t buf[3];
 189 } AER915State;
 190
 191 static int aer915_send(i2c_slave *i2c, uint8_t data)
 192 {
 193     AER915State *s = FROM_I2C_SLAVE(AER915State, i2c);
 194     s->buf[s->len] = data;
 195     if (s->len++ > 2) {
 196         DPRINTF("%s: message too long (%i bytes)\n",
 197             __func__, s->len);
 198         return 1;
 199     }
 200
 201     if (s->len == 2) {
 202         DPRINTF("%s: reg %d value 0x%02x\n", __func__,
 203                 s->buf[0], s->buf[1]);
 204     }
 205
 206     return 0;
 207 }
 208
 209 static void aer915_event(i2c_slave *i2c, enum i2c_event event)
 210 {
 211     AER915State *s = FROM_I2C_SLAVE(AER915State, i2c);
 212     switch (event) {
 213     case I2C_START_SEND:
 214         s->len = 0;
 215         break;
 216     case I2C_START_RECV:
 217         if (s->len != 1) {
 218             DPRINTF("%s: short message!?\n", __func__);
 219         }
 220         break;
 221     case I2C_FINISH:
 222         break;
 223     default:
 224         break;
 225     }
 226 }
 227
 228 static int aer915_recv(i2c_slave *slave)
 229 {
 230     int retval = 0x00;
 231     AER915State *s = FROM_I2C_SLAVE(AER915State, slave);
 232
 233     switch (s->buf[0]) {
 234     /* Return hardcoded battery voltage,
 235      * 0xf0 means ~4.1V
 236      */
 237     case 0x02:
 238         retval = 0xf0;
 239         break;
 240     /* Return 0x00 for other regs,
 241      * we don't know what they are for,
 242      * anyway they return 0x00 on real hardware.
 243      */
 244     default:
 245         break;
 246     }
 247
 248     return retval;
 249 }
 250
 251 static int aer915_init(i2c_slave *i2c)
 252 {
 253     /* Nothing to do.  */
 254     return 0;
 255 }
 256
 257 static VMStateDescription vmstate_aer915_state = {
 258     .name = "aer915",
 259     .version_id = 1,
 260     .minimum_version_id = 1,
 261     .minimum_version_id_old = 1,
 262     .fields = (VMStateField[]) {
 263         VMSTATE_INT32(len, AER915State),
 264         VMSTATE_BUFFER(buf, AER915State),
 265         VMSTATE_END_OF_LIST(),
 266     }
 267 };
 268
 269 static I2CSlaveInfo aer915_info = {
 270     .qdev.name = "aer915",
 271     .qdev.size = sizeof(AER915State),
 272     .qdev.vmsd = &vmstate_aer915_state,
 273     .init = aer915_init,
 274     .event = aer915_event,
 275     .recv = aer915_recv,
 276     .send = aer915_send
 277 };
 278
 279 static void z2_init(ram_addr_t ram_size,
 280                 const char *boot_device,
 281                 const char *kernel_filename, const char *kernel_cmdline,
 282                 const char *initrd_filename, const char *cpu_model)
 283 {
 284     MemoryRegion *address_space_mem = get_system_memory();
 285     uint32_t sector_len = 0x10000;
 286     PXA2xxState *cpu;
 287     DriveInfo *dinfo;
 288     int be;
 289     void *z2_lcd;
 290     i2c_bus *bus;
 291     DeviceState *wm;
 292
 293     if (!cpu_model) {
 294         cpu_model = "pxa270-c5";
 295     }
 296
 297     /* Setup CPU & memory */
 298     cpu = pxa270_init(address_space_mem, z2_binfo.ram_size, cpu_model);
 299
 300 #ifdef TARGET_WORDS_BIGENDIAN
 301     be = 1;
 302 #else
 303     be = 0;
 304 #endif
 305     dinfo = drive_get(IF_PFLASH, 0, 0);
 306     if (!dinfo) {
 307         fprintf(stderr, "Flash image must be given with the "
 308                 "'pflash' parameter\n");
 309         exit(1);
 310     }
 311
 312     if (!pflash_cfi01_register(Z2_FLASH_BASE,
 313                                NULL, "z2.flash0", Z2_FLASH_SIZE,
 314                                dinfo->bdrv, sector_len,
 315                                Z2_FLASH_SIZE / sector_len, 4, 0, 0, 0, 0,
 316                                be)) {
 317         fprintf(stderr, "qemu: Error registering flash memory.\n");
 318         exit(1);
 319     }
 320
 321     /* setup keypad */
 322     pxa27x_register_keypad(cpu->kp, map, 0x100);
 323
 324     /* MMC/SD host */
 325     pxa2xx_mmci_handlers(cpu->mmc,
 326         NULL,
 327         qdev_get_gpio_in(cpu->gpio, Z2_GPIO_SD_DETECT));
 328
 329     ssi_register_slave(&zipit_lcd_info);
 330     i2c_register_slave(&aer915_info);
 331     z2_lcd = ssi_create_slave(cpu->ssp[1], "zipit-lcd");
 332     bus = pxa2xx_i2c_bus(cpu->i2c[0]);
 333     i2c_create_slave(bus, "aer915", 0x55);
 334     wm = i2c_create_slave(bus, "wm8750", 0x1b);
 335     cpu->i2s->opaque = wm;
 336     cpu->i2s->codec_out = wm8750_dac_dat;
 337     cpu->i2s->codec_in = wm8750_adc_dat;
 338     wm8750_data_req_set(wm, cpu->i2s->data_req, cpu->i2s);
 339
 340     qdev_connect_gpio_out(cpu->gpio, Z2_GPIO_LCD_CS,
 341         qemu_allocate_irqs(z2_lcd_cs, z2_lcd, 1)[0]);
 342
 343     if (kernel_filename) {
 344         z2_binfo.kernel_filename = kernel_filename;
 345         z2_binfo.kernel_cmdline = kernel_cmdline;
 346         z2_binfo.initrd_filename = initrd_filename;
 347         z2_binfo.board_id = 0x6dd;
 348         arm_load_kernel(cpu->env, &z2_binfo);
 349     }
 350 }
 351
 352 static QEMUMachine z2_machine = {
 353     .name = "z2",
 354     .desc = "Zipit Z2 (PXA27x)",
 355     .init = z2_init,
 356 };
 357
 358 static void z2_machine_init(void)
 359 {
 360     qemu_register_machine(&z2_machine);
 361 }
 362
 363 machine_init(z2_machine_init);