hw/arm/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 "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 "hw/audio/wm8750.h"
  27 #include "audio/audio.h"
  28 #include "exec/address-spaces.h"
  29 #include "sysemu/qtest.h"
  30 #include "cpu.h"
  31
  32 #ifdef DEBUG_Z2
  33 #define DPRINTF(fmt, ...) \
  34         printf(fmt, ## __VA_ARGS__)
  35 #else
  36 #define DPRINTF(fmt, ...)
  37 #endif
  38
  39 static const struct keymap map[0x100] = {
  40     [0 ... 0xff] = { -1, -1 },
  41     [0x3b] = {0, 0}, /* Option = F1 */
  42     [0xc8] = {0, 1}, /* Up */
  43     [0xd0] = {0, 2}, /* Down */
  44     [0xcb] = {0, 3}, /* Left */
  45     [0xcd] = {0, 4}, /* Right */
  46     [0xcf] = {0, 5}, /* End */
  47     [0x0d] = {0, 6}, /* KPPLUS */
  48     [0xc7] = {1, 0}, /* Home */
  49     [0x10] = {1, 1}, /* Q */
  50     [0x17] = {1, 2}, /* I */
  51     [0x22] = {1, 3}, /* G */
  52     [0x2d] = {1, 4}, /* X */
  53     [0x1c] = {1, 5}, /* Enter */
  54     [0x0c] = {1, 6}, /* KPMINUS */
  55     [0xc9] = {2, 0}, /* PageUp */
  56     [0x11] = {2, 1}, /* W */
  57     [0x18] = {2, 2}, /* O */
  58     [0x23] = {2, 3}, /* H */
  59     [0x2e] = {2, 4}, /* C */
  60     [0x38] = {2, 5}, /* LeftAlt */
  61     [0xd1] = {3, 0}, /* PageDown */
  62     [0x12] = {3, 1}, /* E */
  63     [0x19] = {3, 2}, /* P */
  64     [0x24] = {3, 3}, /* J */
  65     [0x2f] = {3, 4}, /* V */
  66     [0x2a] = {3, 5}, /* LeftShift */
  67     [0x01] = {4, 0}, /* Esc */
  68     [0x13] = {4, 1}, /* R */
  69     [0x1e] = {4, 2}, /* A */
  70     [0x25] = {4, 3}, /* K */
  71     [0x30] = {4, 4}, /* B */
  72     [0x1d] = {4, 5}, /* LeftCtrl */
  73     [0x0f] = {5, 0}, /* Tab */
  74     [0x14] = {5, 1}, /* T */
  75     [0x1f] = {5, 2}, /* S */
  76     [0x26] = {5, 3}, /* L */
  77     [0x31] = {5, 4}, /* N */
  78     [0x39] = {5, 5}, /* Space */
  79     [0x3c] = {6, 0}, /* Stop = F2 */
  80     [0x15] = {6, 1}, /* Y */
  81     [0x20] = {6, 2}, /* D */
  82     [0x0e] = {6, 3}, /* Backspace */
  83     [0x32] = {6, 4}, /* M */
  84     [0x33] = {6, 5}, /* Comma */
  85     [0x3d] = {7, 0}, /* Play = F3 */
  86     [0x16] = {7, 1}, /* U */
  87     [0x21] = {7, 2}, /* F */
  88     [0x2c] = {7, 3}, /* Z */
  89     [0x27] = {7, 4}, /* Semicolon */
  90     [0x34] = {7, 5}, /* Dot */
  91 };
  92
  93 #define Z2_RAM_SIZE     0x02000000
  94 #define Z2_FLASH_BASE   0x00000000
  95 #define Z2_FLASH_SIZE   0x00800000
  96
  97 static struct arm_boot_info z2_binfo = {
  98     .loader_start   = PXA2XX_SDRAM_BASE,
  99     .ram_size       = Z2_RAM_SIZE,
 100 };
 101
 102 #define Z2_GPIO_SD_DETECT   96
 103 #define Z2_GPIO_AC_IN       0
 104 #define Z2_GPIO_KEY_ON      1
 105 #define Z2_GPIO_LCD_CS      88
 106
 107 typedef struct {
 108     SSISlave ssidev;
 109     int32_t selected;
 110     int32_t enabled;
 111     uint8_t buf[3];
 112     uint32_t cur_reg;
 113     int pos;
 114 } ZipitLCD;
 115
 116 static uint32_t zipit_lcd_transfer(SSISlave *dev, uint32_t value)
 117 {
 118     ZipitLCD *z = FROM_SSI_SLAVE(ZipitLCD, dev);
 119     uint16_t val;
 120     if (z->selected) {
 121         z->buf[z->pos] = value & 0xff;
 122         z->pos++;
 123     }
 124     if (z->pos == 3) {
 125         switch (z->buf[0]) {
 126         case 0x74:
 127             DPRINTF("%s: reg: 0x%.2x\n", __func__, z->buf[2]);
 128             z->cur_reg = z->buf[2];
 129             break;
 130         case 0x76:
 131             val = z->buf[1] << 8 | z->buf[2];
 132             DPRINTF("%s: value: 0x%.4x\n", __func__, val);
 133             if (z->cur_reg == 0x22 && val == 0x0000) {
 134                 z->enabled = 1;
 135                 printf("%s: LCD enabled\n", __func__);
 136             } else if (z->cur_reg == 0x10 && val == 0x0000) {
 137                 z->enabled = 0;
 138                 printf("%s: LCD disabled\n", __func__);
 139             }
 140             break;
 141         default:
 142             DPRINTF("%s: unknown command!\n", __func__);
 143             break;
 144         }
 145         z->pos = 0;
 146     }
 147     return 0;
 148 }
 149
 150 static void z2_lcd_cs(void *opaque, int line, int level)
 151 {
 152     ZipitLCD *z2_lcd = opaque;
 153     z2_lcd->selected = !level;
 154 }
 155
 156 static void zipit_lcd_realize(SSISlave *dev, Error **errp)
 157 {
 158     ZipitLCD *z = FROM_SSI_SLAVE(ZipitLCD, dev);
 159     z->selected = 0;
 160     z->enabled = 0;
 161     z->pos = 0;
 162 }
 163
 164 static VMStateDescription vmstate_zipit_lcd_state = {
 165     .name = "zipit-lcd",
 166     .version_id = 2,
 167     .minimum_version_id = 2,
 168     .fields = (VMStateField[]) {
 169         VMSTATE_SSI_SLAVE(ssidev, ZipitLCD),
 170         VMSTATE_INT32(selected, ZipitLCD),
 171         VMSTATE_INT32(enabled, ZipitLCD),
 172         VMSTATE_BUFFER(buf, ZipitLCD),
 173         VMSTATE_UINT32(cur_reg, ZipitLCD),
 174         VMSTATE_INT32(pos, ZipitLCD),
 175         VMSTATE_END_OF_LIST(),
 176     }
 177 };
 178
 179 static void zipit_lcd_class_init(ObjectClass *klass, void *data)
 180 {
 181     DeviceClass *dc = DEVICE_CLASS(klass);
 182     SSISlaveClass *k = SSI_SLAVE_CLASS(klass);
 183
 184     k->realize = zipit_lcd_realize;
 185     k->transfer = zipit_lcd_transfer;
 186     dc->vmsd = &vmstate_zipit_lcd_state;
 187 }
 188
 189 static const TypeInfo zipit_lcd_info = {
 190     .name          = "zipit-lcd",
 191     .parent        = TYPE_SSI_SLAVE,
 192     .instance_size = sizeof(ZipitLCD),
 193     .class_init    = zipit_lcd_class_init,
 194 };
 195
 196 #define TYPE_AER915 "aer915"
 197 #define AER915(obj) OBJECT_CHECK(AER915State, (obj), TYPE_AER915)
 198
 199 typedef struct AER915State {
 200     I2CSlave parent_obj;
 201
 202     int len;
 203     uint8_t buf[3];
 204 } AER915State;
 205
 206 static int aer915_send(I2CSlave *i2c, uint8_t data)
 207 {
 208     AER915State *s = AER915(i2c);
 209
 210     s->buf[s->len] = data;
 211     if (s->len++ > 2) {
 212         DPRINTF("%s: message too long (%i bytes)\n",
 213             __func__, s->len);
 214         return 1;
 215     }
 216
 217     if (s->len == 2) {
 218         DPRINTF("%s: reg %d value 0x%02x\n", __func__,
 219                 s->buf[0], s->buf[1]);
 220     }
 221
 222     return 0;
 223 }
 224
 225 static int aer915_event(I2CSlave *i2c, enum i2c_event event)
 226 {
 227     AER915State *s = AER915(i2c);
 228
 229     switch (event) {
 230     case I2C_START_SEND:
 231         s->len = 0;
 232         break;
 233     case I2C_START_RECV:
 234         if (s->len != 1) {
 235             DPRINTF("%s: short message!?\n", __func__);
 236         }
 237         break;
 238     case I2C_FINISH:
 239         break;
 240     default:
 241         break;
 242     }
 243
 244     return 0;
 245 }
 246
 247 static int aer915_recv(I2CSlave *slave)
 248 {
 249     AER915State *s = AER915(slave);
 250     int retval = 0x00;
 251
 252     switch (s->buf[0]) {
 253     /* Return hardcoded battery voltage,
 254      * 0xf0 means ~4.1V
 255      */
 256     case 0x02:
 257         retval = 0xf0;
 258         break;
 259     /* Return 0x00 for other regs,
 260      * we don't know what they are for,
 261      * anyway they return 0x00 on real hardware.
 262      */
 263     default:
 264         break;
 265     }
 266
 267     return retval;
 268 }
 269
 270 static VMStateDescription vmstate_aer915_state = {
 271     .name = "aer915",
 272     .version_id = 1,
 273     .minimum_version_id = 1,
 274     .fields = (VMStateField[]) {
 275         VMSTATE_INT32(len, AER915State),
 276         VMSTATE_BUFFER(buf, AER915State),
 277         VMSTATE_END_OF_LIST(),
 278     }
 279 };
 280
 281 static void aer915_class_init(ObjectClass *klass, void *data)
 282 {
 283     DeviceClass *dc = DEVICE_CLASS(klass);
 284     I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
 285
 286     k->event = aer915_event;
 287     k->recv = aer915_recv;
 288     k->send = aer915_send;
 289     dc->vmsd = &vmstate_aer915_state;
 290 }
 291
 292 static const TypeInfo aer915_info = {
 293     .name          = TYPE_AER915,
 294     .parent        = TYPE_I2C_SLAVE,
 295     .instance_size = sizeof(AER915State),
 296     .class_init    = aer915_class_init,
 297 };
 298
 299 static void z2_init(MachineState *machine)
 300 {
 301     const char *kernel_filename = machine->kernel_filename;
 302     const char *kernel_cmdline = machine->kernel_cmdline;
 303     const char *initrd_filename = machine->initrd_filename;
 304     MemoryRegion *address_space_mem = get_system_memory();
 305     uint32_t sector_len = 0x10000;
 306     PXA2xxState *mpu;
 307     DriveInfo *dinfo;
 308     int be;
 309     void *z2_lcd;
 310     I2CBus *bus;
 311     DeviceState *wm;
 312
 313     /* Setup CPU & memory */
 314     mpu = pxa270_init(address_space_mem, z2_binfo.ram_size, machine->cpu_type);
 315
 316 #ifdef TARGET_WORDS_BIGENDIAN
 317     be = 1;
 318 #else
 319     be = 0;
 320 #endif
 321     dinfo = drive_get(IF_PFLASH, 0, 0);
 322     if (!dinfo && !qtest_enabled()) {
 323         fprintf(stderr, "Flash image must be given with the "
 324                 "'pflash' parameter\n");
 325         exit(1);
 326     }
 327
 328     if (!pflash_cfi01_register(Z2_FLASH_BASE,
 329                                NULL, "z2.flash0", Z2_FLASH_SIZE,
 330                                dinfo ? blk_by_legacy_dinfo(dinfo) : NULL,
 331                                sector_len, Z2_FLASH_SIZE / sector_len,
 332                                4, 0, 0, 0, 0, be)) {
 333         fprintf(stderr, "qemu: Error registering flash memory.\n");
 334         exit(1);
 335     }
 336
 337     /* setup keypad */
 338     pxa27x_register_keypad(mpu->kp, map, 0x100);
 339
 340     /* MMC/SD host */
 341     pxa2xx_mmci_handlers(mpu->mmc,
 342         NULL,
 343         qdev_get_gpio_in(mpu->gpio, Z2_GPIO_SD_DETECT));
 344
 345     type_register_static(&zipit_lcd_info);
 346     type_register_static(&aer915_info);
 347     z2_lcd = ssi_create_slave(mpu->ssp[1], "zipit-lcd");
 348     bus = pxa2xx_i2c_bus(mpu->i2c[0]);
 349     i2c_create_slave(bus, TYPE_AER915, 0x55);
 350     wm = i2c_create_slave(bus, TYPE_WM8750, 0x1b);
 351     mpu->i2s->opaque = wm;
 352     mpu->i2s->codec_out = wm8750_dac_dat;
 353     mpu->i2s->codec_in = wm8750_adc_dat;
 354     wm8750_data_req_set(wm, mpu->i2s->data_req, mpu->i2s);
 355
 356     qdev_connect_gpio_out(mpu->gpio, Z2_GPIO_LCD_CS,
 357                           qemu_allocate_irq(z2_lcd_cs, z2_lcd, 0));
 358
 359     z2_binfo.kernel_filename = kernel_filename;
 360     z2_binfo.kernel_cmdline = kernel_cmdline;
 361     z2_binfo.initrd_filename = initrd_filename;
 362     z2_binfo.board_id = 0x6dd;
 363     arm_load_kernel(mpu->cpu, &z2_binfo);
 364 }
 365
 366 static void z2_machine_init(MachineClass *mc)
 367 {
 368     mc->desc = "Zipit Z2 (PXA27x)";
 369     mc->init = z2_init;
 370     mc->ignore_memory_transaction_failures = true;
 371     mc->default_cpu_type = ARM_CPU_TYPE_NAME("pxa270-c5");
 372 }
 373
 374 DEFINE_MACHINE("z2", z2_machine_init)