qemu/hw/arm/z2.c
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   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 "qemu/osdep.h"
  15#include "hw/hw.h"
  16#include "hw/arm/pxa.h"
  17#include "hw/arm/arm.h"
  18#include "hw/devices.h"
  19#include "hw/i2c/i2c.h"
  20#include "hw/ssi/ssi.h"
  21#include "hw/boards.h"
  22#include "sysemu/sysemu.h"
  23#include "hw/block/flash.h"
  24#include "sysemu/block-backend.h"
  25#include "ui/console.h"
  26#include "audio/audio.h"
  27#include "exec/address-spaces.h"
  28#include "sysemu/qtest.h"
  29
  30#ifdef DEBUG_Z2
  31#define DPRINTF(fmt, ...) \
  32        printf(fmt, ## __VA_ARGS__)
  33#else
  34#define DPRINTF(fmt, ...)
  35#endif
  36
  37static const struct keymap map[0x100] = {
  38    [0 ... 0xff] = { -1, -1 },
  39    [0x3b] = {0, 0}, /* Option = F1 */
  40    [0xc8] = {0, 1}, /* Up */
  41    [0xd0] = {0, 2}, /* Down */
  42    [0xcb] = {0, 3}, /* Left */
  43    [0xcd] = {0, 4}, /* Right */
  44    [0xcf] = {0, 5}, /* End */
  45    [0x0d] = {0, 6}, /* KPPLUS */
  46    [0xc7] = {1, 0}, /* Home */
  47    [0x10] = {1, 1}, /* Q */
  48    [0x17] = {1, 2}, /* I */
  49    [0x22] = {1, 3}, /* G */
  50    [0x2d] = {1, 4}, /* X */
  51    [0x1c] = {1, 5}, /* Enter */
  52    [0x0c] = {1, 6}, /* KPMINUS */
  53    [0xc9] = {2, 0}, /* PageUp */
  54    [0x11] = {2, 1}, /* W */
  55    [0x18] = {2, 2}, /* O */
  56    [0x23] = {2, 3}, /* H */
  57    [0x2e] = {2, 4}, /* C */
  58    [0x38] = {2, 5}, /* LeftAlt */
  59    [0xd1] = {3, 0}, /* PageDown */
  60    [0x12] = {3, 1}, /* E */
  61    [0x19] = {3, 2}, /* P */
  62    [0x24] = {3, 3}, /* J */
  63    [0x2f] = {3, 4}, /* V */
  64    [0x2a] = {3, 5}, /* LeftShift */
  65    [0x01] = {4, 0}, /* Esc */
  66    [0x13] = {4, 1}, /* R */
  67    [0x1e] = {4, 2}, /* A */
  68    [0x25] = {4, 3}, /* K */
  69    [0x30] = {4, 4}, /* B */
  70    [0x1d] = {4, 5}, /* LeftCtrl */
  71    [0x0f] = {5, 0}, /* Tab */
  72    [0x14] = {5, 1}, /* T */
  73    [0x1f] = {5, 2}, /* S */
  74    [0x26] = {5, 3}, /* L */
  75    [0x31] = {5, 4}, /* N */
  76    [0x39] = {5, 5}, /* Space */
  77    [0x3c] = {6, 0}, /* Stop = F2 */
  78    [0x15] = {6, 1}, /* Y */
  79    [0x20] = {6, 2}, /* D */
  80    [0x0e] = {6, 3}, /* Backspace */
  81    [0x32] = {6, 4}, /* M */
  82    [0x33] = {6, 5}, /* Comma */
  83    [0x3d] = {7, 0}, /* Play = F3 */
  84    [0x16] = {7, 1}, /* U */
  85    [0x21] = {7, 2}, /* F */
  86    [0x2c] = {7, 3}, /* Z */
  87    [0x27] = {7, 4}, /* Semicolon */
  88    [0x34] = {7, 5}, /* Dot */
  89};
  90
  91#define Z2_RAM_SIZE     0x02000000
  92#define Z2_FLASH_BASE   0x00000000
  93#define Z2_FLASH_SIZE   0x00800000
  94
  95static struct arm_boot_info z2_binfo = {
  96    .loader_start   = PXA2XX_SDRAM_BASE,
  97    .ram_size       = Z2_RAM_SIZE,
  98};
  99
 100#define Z2_GPIO_SD_DETECT   96
 101#define Z2_GPIO_AC_IN       0
 102#define Z2_GPIO_KEY_ON      1
 103#define Z2_GPIO_LCD_CS      88
 104
 105typedef struct {
 106    SSISlave ssidev;
 107    int32_t selected;
 108    int32_t enabled;
 109    uint8_t buf[3];
 110    uint32_t cur_reg;
 111    int pos;
 112} ZipitLCD;
 113
 114static uint32_t zipit_lcd_transfer(SSISlave *dev, uint32_t value)
 115{
 116    ZipitLCD *z = FROM_SSI_SLAVE(ZipitLCD, dev);
 117    uint16_t val;
 118    if (z->selected) {
 119        z->buf[z->pos] = value & 0xff;
 120        z->pos++;
 121    }
 122    if (z->pos == 3) {
 123        switch (z->buf[0]) {
 124        case 0x74:
 125            DPRINTF("%s: reg: 0x%.2x\n", __func__, z->buf[2]);
 126            z->cur_reg = z->buf[2];
 127            break;
 128        case 0x76:
 129            val = z->buf[1] << 8 | z->buf[2];
 130            DPRINTF("%s: value: 0x%.4x\n", __func__, val);
 131            if (z->cur_reg == 0x22 && val == 0x0000) {
 132                z->enabled = 1;
 133                printf("%s: LCD enabled\n", __func__);
 134            } else if (z->cur_reg == 0x10 && val == 0x0000) {
 135                z->enabled = 0;
 136                printf("%s: LCD disabled\n", __func__);
 137            }
 138            break;
 139        default:
 140            DPRINTF("%s: unknown command!\n", __func__);
 141            break;
 142        }
 143        z->pos = 0;
 144    }
 145    return 0;
 146}
 147
 148static void z2_lcd_cs(void *opaque, int line, int level)
 149{
 150    ZipitLCD *z2_lcd = opaque;
 151    z2_lcd->selected = !level;
 152}
 153
 154static void zipit_lcd_realize(SSISlave *dev, Error **errp)
 155{
 156    ZipitLCD *z = FROM_SSI_SLAVE(ZipitLCD, dev);
 157    z->selected = 0;
 158    z->enabled = 0;
 159    z->pos = 0;
 160}
 161
 162static VMStateDescription vmstate_zipit_lcd_state = {
 163    .name = "zipit-lcd",
 164    .version_id = 2,
 165    .minimum_version_id = 2,
 166    .fields = (VMStateField[]) {
 167        VMSTATE_SSI_SLAVE(ssidev, ZipitLCD),
 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
 177static void zipit_lcd_class_init(ObjectClass *klass, void *data)
 178{
 179    DeviceClass *dc = DEVICE_CLASS(klass);
 180    SSISlaveClass *k = SSI_SLAVE_CLASS(klass);
 181
 182    k->realize = zipit_lcd_realize;
 183    k->transfer = zipit_lcd_transfer;
 184    dc->vmsd = &vmstate_zipit_lcd_state;
 185}
 186
 187static const TypeInfo zipit_lcd_info = {
 188    .name          = "zipit-lcd",
 189    .parent        = TYPE_SSI_SLAVE,
 190    .instance_size = sizeof(ZipitLCD),
 191    .class_init    = zipit_lcd_class_init,
 192};
 193
 194#define TYPE_AER915 "aer915"
 195#define AER915(obj) OBJECT_CHECK(AER915State, (obj), TYPE_AER915)
 196
 197typedef struct AER915State {
 198    I2CSlave parent_obj;
 199
 200    int len;
 201    uint8_t buf[3];
 202} AER915State;
 203
 204static int aer915_send(I2CSlave *i2c, uint8_t data)
 205{
 206    AER915State *s = AER915(i2c);
 207
 208    s->buf[s->len] = data;
 209    if (s->len++ > 2) {
 210        DPRINTF("%s: message too long (%i bytes)\n",
 211            __func__, s->len);
 212        return 1;
 213    }
 214
 215    if (s->len == 2) {
 216        DPRINTF("%s: reg %d value 0x%02x\n", __func__,
 217                s->buf[0], s->buf[1]);
 218    }
 219
 220    return 0;
 221}
 222
 223static void aer915_event(I2CSlave *i2c, enum i2c_event event)
 224{
 225    AER915State *s = AER915(i2c);
 226
 227    switch (event) {
 228    case I2C_START_SEND:
 229        s->len = 0;
 230        break;
 231    case I2C_START_RECV:
 232        if (s->len != 1) {
 233            DPRINTF("%s: short message!?\n", __func__);
 234        }
 235        break;
 236    case I2C_FINISH:
 237        break;
 238    default:
 239        break;
 240    }
 241}
 242
 243static int aer915_recv(I2CSlave *slave)
 244{
 245    AER915State *s = AER915(slave);
 246    int retval = 0x00;
 247
 248    switch (s->buf[0]) {
 249    /* Return hardcoded battery voltage,
 250     * 0xf0 means ~4.1V
 251     */
 252    case 0x02:
 253        retval = 0xf0;
 254        break;
 255    /* Return 0x00 for other regs,
 256     * we don't know what they are for,
 257     * anyway they return 0x00 on real hardware.
 258     */
 259    default:
 260        break;
 261    }
 262
 263    return retval;
 264}
 265
 266static int aer915_init(I2CSlave *i2c)
 267{
 268    /* Nothing to do.  */
 269    return 0;
 270}
 271
 272static VMStateDescription vmstate_aer915_state = {
 273    .name = "aer915",
 274    .version_id = 1,
 275    .minimum_version_id = 1,
 276    .fields = (VMStateField[]) {
 277        VMSTATE_INT32(len, AER915State),
 278        VMSTATE_BUFFER(buf, AER915State),
 279        VMSTATE_END_OF_LIST(),
 280    }
 281};
 282
 283static void aer915_class_init(ObjectClass *klass, void *data)
 284{
 285    DeviceClass *dc = DEVICE_CLASS(klass);
 286    I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
 287
 288    k->init = aer915_init;
 289    k->event = aer915_event;
 290    k->recv = aer915_recv;
 291    k->send = aer915_send;
 292    dc->vmsd = &vmstate_aer915_state;
 293}
 294
 295static const TypeInfo aer915_info = {
 296    .name          = TYPE_AER915,
 297    .parent        = TYPE_I2C_SLAVE,
 298    .instance_size = sizeof(AER915State),
 299    .class_init    = aer915_class_init,
 300};
 301
 302static void z2_init(MachineState *machine)
 303{
 304    const char *cpu_model = machine->cpu_model;
 305    const char *kernel_filename = machine->kernel_filename;
 306    const char *kernel_cmdline = machine->kernel_cmdline;
 307    const char *initrd_filename = machine->initrd_filename;
 308    MemoryRegion *address_space_mem = get_system_memory();
 309    uint32_t sector_len = 0x10000;
 310    PXA2xxState *mpu;
 311    DriveInfo *dinfo;
 312    int be;
 313    void *z2_lcd;
 314    I2CBus *bus;
 315    DeviceState *wm;
 316
 317    if (!cpu_model) {
 318        cpu_model = "pxa270-c5";
 319    }
 320
 321    /* Setup CPU & memory */
 322    mpu = pxa270_init(address_space_mem, z2_binfo.ram_size, cpu_model);
 323
 324#ifdef TARGET_WORDS_BIGENDIAN
 325    be = 1;
 326#else
 327    be = 0;
 328#endif
 329    dinfo = drive_get(IF_PFLASH, 0, 0);
 330    if (!dinfo && !qtest_enabled()) {
 331        fprintf(stderr, "Flash image must be given with the "
 332                "'pflash' parameter\n");
 333        exit(1);
 334    }
 335
 336    if (!pflash_cfi01_register(Z2_FLASH_BASE,
 337                               NULL, "z2.flash0", Z2_FLASH_SIZE,
 338                               dinfo ? blk_by_legacy_dinfo(dinfo) : NULL,
 339                               sector_len, Z2_FLASH_SIZE / sector_len,
 340                               4, 0, 0, 0, 0, be)) {
 341        fprintf(stderr, "qemu: Error registering flash memory.\n");
 342        exit(1);
 343    }
 344
 345    /* setup keypad */
 346    pxa27x_register_keypad(mpu->kp, map, 0x100);
 347
 348    /* MMC/SD host */
 349    pxa2xx_mmci_handlers(mpu->mmc,
 350        NULL,
 351        qdev_get_gpio_in(mpu->gpio, Z2_GPIO_SD_DETECT));
 352
 353    type_register_static(&zipit_lcd_info);
 354    type_register_static(&aer915_info);
 355    z2_lcd = ssi_create_slave(mpu->ssp[1], "zipit-lcd");
 356    bus = pxa2xx_i2c_bus(mpu->i2c[0]);
 357    i2c_create_slave(bus, TYPE_AER915, 0x55);
 358    wm = i2c_create_slave(bus, "wm8750", 0x1b);
 359    mpu->i2s->opaque = wm;
 360    mpu->i2s->codec_out = wm8750_dac_dat;
 361    mpu->i2s->codec_in = wm8750_adc_dat;
 362    wm8750_data_req_set(wm, mpu->i2s->data_req, mpu->i2s);
 363
 364    qdev_connect_gpio_out(mpu->gpio, Z2_GPIO_LCD_CS,
 365                          qemu_allocate_irq(z2_lcd_cs, z2_lcd, 0));
 366
 367    z2_binfo.kernel_filename = kernel_filename;
 368    z2_binfo.kernel_cmdline = kernel_cmdline;
 369    z2_binfo.initrd_filename = initrd_filename;
 370    z2_binfo.board_id = 0x6dd;
 371    arm_load_kernel(mpu->cpu, &z2_binfo);
 372}
 373
 374static void z2_machine_init(MachineClass *mc)
 375{
 376    mc->desc = "Zipit Z2 (PXA27x)";
 377    mc->init = z2_init;
 378}
 379
 380DEFINE_MACHINE("z2", z2_machine_init)
 381