Archipelago » qemu

/*

 * PXA270-based Zipit Z2 device

 *

 * Copyright (c) 2011 by Vasily Khoruzhick <anarsoul@gmail.com>

 *

 * Code is based on mainstone platform.

 *

 * This code is licensed under the GNU GPL v2.

 */

#include "hw.h"

#include "pxa.h"

#include "arm-misc.h"

#include "devices.h"

#include "i2c.h"

#include "ssi.h"

#include "boards.h"

#include "sysemu.h"

#include "flash.h"

#include "blockdev.h"

#include "console.h"

#include "audio/audio.h"

#include "exec-memory.h"

#ifdef DEBUG_Z2

#define DPRINTF(fmt, ...) \

        printf(fmt, ## __VA_ARGS__)

#else

#define DPRINTF(fmt, ...)

#endif

static struct keymap map[0x100] = {

    [0 ... 0xff] = { -1, -1 },

    [0x3b] = {0, 0}, /* Option = F1 */

    [0xc8] = {0, 1}, /* Up */

    [0xd0] = {0, 2}, /* Down */

    [0xcb] = {0, 3}, /* Left */

    [0xcd] = {0, 4}, /* Right */

    [0xcf] = {0, 5}, /* End */

    [0x0d] = {0, 6}, /* KPPLUS */

    [0xc7] = {1, 0}, /* Home */

    [0x10] = {1, 1}, /* Q */

    [0x17] = {1, 2}, /* I */

    [0x22] = {1, 3}, /* G */

    [0x2d] = {1, 4}, /* X */

    [0x1c] = {1, 5}, /* Enter */

    [0x0c] = {1, 6}, /* KPMINUS */

    [0xc9] = {2, 0}, /* PageUp */

    [0x11] = {2, 1}, /* W */

    [0x18] = {2, 2}, /* O */

    [0x23] = {2, 3}, /* H */

    [0x2e] = {2, 4}, /* C */

    [0x38] = {2, 5}, /* LeftAlt */

    [0xd1] = {3, 0}, /* PageDown */

    [0x12] = {3, 1}, /* E */

    [0x19] = {3, 2}, /* P */

    [0x24] = {3, 3}, /* J */

    [0x2f] = {3, 4}, /* V */

    [0x2a] = {3, 5}, /* LeftShift */

    [0x01] = {4, 0}, /* Esc */

    [0x13] = {4, 1}, /* R */

    [0x1e] = {4, 2}, /* A */

    [0x25] = {4, 3}, /* K */

    [0x30] = {4, 4}, /* B */

    [0x1d] = {4, 5}, /* LeftCtrl */

    [0x0f] = {5, 0}, /* Tab */

    [0x14] = {5, 1}, /* T */

    [0x1f] = {5, 2}, /* S */

    [0x26] = {5, 3}, /* L */

    [0x31] = {5, 4}, /* N */

    [0x39] = {5, 5}, /* Space */

    [0x3c] = {6, 0}, /* Stop = F2 */

    [0x15] = {6, 1}, /* Y */

    [0x20] = {6, 2}, /* D */

    [0x0e] = {6, 3}, /* Backspace */

    [0x32] = {6, 4}, /* M */

    [0x33] = {6, 5}, /* Comma */

    [0x3d] = {7, 0}, /* Play = F3 */

    [0x16] = {7, 1}, /* U */

    [0x21] = {7, 2}, /* F */

    [0x2c] = {7, 3}, /* Z */

    [0x27] = {7, 4}, /* Semicolon */

    [0x34] = {7, 5}, /* Dot */

};

#define Z2_RAM_SIZE     0x02000000

#define Z2_FLASH_BASE   0x00000000

#define Z2_FLASH_SIZE   0x00800000

static struct arm_boot_info z2_binfo = {

    .loader_start   = PXA2XX_SDRAM_BASE,

    .ram_size       = Z2_RAM_SIZE,

};

#define Z2_GPIO_SD_DETECT   96

#define Z2_GPIO_AC_IN       0

#define Z2_GPIO_KEY_ON      1

#define Z2_GPIO_LCD_CS      88

typedef struct {

    SSISlave ssidev;

    int32_t selected;

    int32_t enabled;

    uint8_t buf[3];

    uint32_t cur_reg;

    int pos;

} ZipitLCD;

static uint32_t zipit_lcd_transfer(SSISlave *dev, uint32_t value)

{

    ZipitLCD *z = FROM_SSI_SLAVE(ZipitLCD, dev);

    uint16_t val;

    if (z->selected) {

        z->buf[z->pos] = value & 0xff;

        z->pos++;

    }

    if (z->pos == 3) {

        switch (z->buf[0]) {

        case 0x74:

            DPRINTF("%s: reg: 0x%.2x\n", __func__, z->buf[2]);

            z->cur_reg = z->buf[2];

            break;

        case 0x76:

            val = z->buf[1] << 8 | z->buf[2];

            DPRINTF("%s: value: 0x%.4x\n", __func__, val);

            if (z->cur_reg == 0x22 && val == 0x0000) {

                z->enabled = 1;

                printf("%s: LCD enabled\n", __func__);

            } else if (z->cur_reg == 0x10 && val == 0x0000) {

                z->enabled = 0;

                printf("%s: LCD disabled\n", __func__);

            }

            break;

        default:

            DPRINTF("%s: unknown command!\n", __func__);

            break;

        }

        z->pos = 0;

    }

    return 0;

}

static void z2_lcd_cs(void *opaque, int line, int level)

{

    ZipitLCD *z2_lcd = opaque;

    z2_lcd->selected = !level;

}

static int zipit_lcd_init(SSISlave *dev)

{

    ZipitLCD *z = FROM_SSI_SLAVE(ZipitLCD, dev);

    z->selected = 0;

    z->enabled = 0;

    z->pos = 0;

    return 0;

}

static VMStateDescription vmstate_zipit_lcd_state = {

    .name = "zipit-lcd",

    .version_id = 1,

    .minimum_version_id = 1,

    .minimum_version_id_old = 1,

    .fields = (VMStateField[]) {

        VMSTATE_INT32(selected, ZipitLCD),

        VMSTATE_INT32(enabled, ZipitLCD),

        VMSTATE_BUFFER(buf, ZipitLCD),

        VMSTATE_UINT32(cur_reg, ZipitLCD),

        VMSTATE_INT32(pos, ZipitLCD),

        VMSTATE_END_OF_LIST(),

    }

};

static SSISlaveInfo zipit_lcd_info = {

    .qdev.name = "zipit-lcd",

    .qdev.size = sizeof(ZipitLCD),

    .qdev.vmsd = &vmstate_zipit_lcd_state,

    .init = zipit_lcd_init,

    .transfer = zipit_lcd_transfer

};

typedef struct {

    i2c_slave i2c;

    int len;

    uint8_t buf[3];

} AER915State;

static int aer915_send(i2c_slave *i2c, uint8_t data)

{

    AER915State *s = FROM_I2C_SLAVE(AER915State, i2c);

    s->buf[s->len] = data;

    if (s->len++ > 2) {

        DPRINTF("%s: message too long (%i bytes)\n",

            __func__, s->len);

        return 1;

    }

    if (s->len == 2) {

        DPRINTF("%s: reg %d value 0x%02x\n", __func__,

                s->buf[0], s->buf[1]);

    }

    return 0;

}

static void aer915_event(i2c_slave *i2c, enum i2c_event event)

{

    AER915State *s = FROM_I2C_SLAVE(AER915State, i2c);

    switch (event) {

    case I2C_START_SEND:

        s->len = 0;

        break;

    case I2C_START_RECV:

        if (s->len != 1) {

            DPRINTF("%s: short message!?\n", __func__);

        }

        break;

    case I2C_FINISH:

        break;

    default:

        break;

    }

}

static int aer915_recv(i2c_slave *slave)

{

    int retval = 0x00;

    AER915State *s = FROM_I2C_SLAVE(AER915State, slave);

    switch (s->buf[0]) {

    /* Return hardcoded battery voltage,

     * 0xf0 means ~4.1V

     */

    case 0x02:

        retval = 0xf0;

        break;

    /* Return 0x00 for other regs,

     * we don't know what they are for,

     * anyway they return 0x00 on real hardware.

     */

    default:

        break;

    }

    return retval;

}

static int aer915_init(i2c_slave *i2c)

{

    /* Nothing to do.  */

    return 0;

}

static VMStateDescription vmstate_aer915_state = {

    .name = "aer915",

    .version_id = 1,

    .minimum_version_id = 1,

    .minimum_version_id_old = 1,

    .fields = (VMStateField[]) {

        VMSTATE_INT32(len, AER915State),

        VMSTATE_BUFFER(buf, AER915State),

        VMSTATE_END_OF_LIST(),

    }

};

static I2CSlaveInfo aer915_info = {

    .qdev.name = "aer915",

    .qdev.size = sizeof(AER915State),

    .qdev.vmsd = &vmstate_aer915_state,

    .init = aer915_init,

    .event = aer915_event,

    .recv = aer915_recv,

    .send = aer915_send

};

static void z2_init(ram_addr_t ram_size,

                const char *boot_device,

                const char *kernel_filename, const char *kernel_cmdline,

                const char *initrd_filename, const char *cpu_model)

{

    MemoryRegion *address_space_mem = get_system_memory();

    uint32_t sector_len = 0x10000;

    PXA2xxState *cpu;

    DriveInfo *dinfo;

    int be;

    void *z2_lcd;

    i2c_bus *bus;

    DeviceState *wm;

    if (!cpu_model) {

        cpu_model = "pxa270-c5";

    }

    /* Setup CPU & memory */

    cpu = pxa270_init(address_space_mem, z2_binfo.ram_size, cpu_model);

#ifdef TARGET_WORDS_BIGENDIAN

    be = 1;

#else

    be = 0;

#endif

    dinfo = drive_get(IF_PFLASH, 0, 0);

    if (!dinfo) {

        fprintf(stderr, "Flash image must be given with the "

                "'pflash' parameter\n");

        exit(1);

    }

    if (!pflash_cfi01_register(Z2_FLASH_BASE,

                               NULL, "z2.flash0", Z2_FLASH_SIZE,

                               dinfo->bdrv, sector_len,

                               Z2_FLASH_SIZE / sector_len, 4, 0, 0, 0, 0,

                               be)) {

        fprintf(stderr, "qemu: Error registering flash memory.\n");

        exit(1);

    }

    /* setup keypad */

    pxa27x_register_keypad(cpu->kp, map, 0x100);

    /* MMC/SD host */

    pxa2xx_mmci_handlers(cpu->mmc,

        NULL,

        qdev_get_gpio_in(cpu->gpio, Z2_GPIO_SD_DETECT));

    ssi_register_slave(&zipit_lcd_info);

    i2c_register_slave(&aer915_info);

    z2_lcd = ssi_create_slave(cpu->ssp[1], "zipit-lcd");

    bus = pxa2xx_i2c_bus(cpu->i2c[0]);

    i2c_create_slave(bus, "aer915", 0x55);

    wm = i2c_create_slave(bus, "wm8750", 0x1b);

    cpu->i2s->opaque = wm;

    cpu->i2s->codec_out = wm8750_dac_dat;

    cpu->i2s->codec_in = wm8750_adc_dat;

    wm8750_data_req_set(wm, cpu->i2s->data_req, cpu->i2s);

    qdev_connect_gpio_out(cpu->gpio, Z2_GPIO_LCD_CS,

        qemu_allocate_irqs(z2_lcd_cs, z2_lcd, 1)[0]);

    if (kernel_filename) {

        z2_binfo.kernel_filename = kernel_filename;

        z2_binfo.kernel_cmdline = kernel_cmdline;

        z2_binfo.initrd_filename = initrd_filename;

        z2_binfo.board_id = 0x6dd;

        arm_load_kernel(cpu->env, &z2_binfo);

    }

}

static QEMUMachine z2_machine = {

    .name = "z2",

    .desc = "Zipit Z2 (PXA27x)",

    .init = z2_init,

};

static void z2_machine_init(void)

{

    qemu_register_machine(&z2_machine);

}

machine_init(z2_machine_init);