LXR qemu/hw/cris/axis

   1/*
   2 * QEMU model for the AXIS devboard 88.
   3 *
   4 * Copyright (c) 2009 Edgar E. Iglesias, Axis Communications AB.
   5 *
   6 * Permission is hereby granted, free of charge, to any person obtaining a copy
   7 * of this software and associated documentation files (the "Software"), to deal
   8 * in the Software without restriction, including without limitation the rights
   9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 * copies of the Software, and to permit persons to whom the Software is
  11 * furnished to do so, subject to the following conditions:
  12 *
  13 * The above copyright notice and this permission notice shall be included in
  14 * all copies or substantial portions of the Software.
  15 *
  16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22 * THE SOFTWARE.
  23 */
  24
  25#include "qemu/osdep.h"
  26#include "qemu/units.h"
  27#include "qapi/error.h"
  28#include "qemu-common.h"
  29#include "cpu.h"
  30#include "hw/sysbus.h"
  31#include "net/net.h"
  32#include "hw/block/flash.h"
  33#include "hw/boards.h"
  34#include "hw/cris/etraxfs.h"
  35#include "hw/loader.h"
  36#include "elf.h"
  37#include "boot.h"
  38#include "exec/address-spaces.h"
  39#include "sysemu/qtest.h"
  40#include "sysemu/sysemu.h"
  41
  42#define D(x)
  43#define DNAND(x)
  44
  45struct nand_state_t
  46{
  47    DeviceState *nand;
  48    MemoryRegion iomem;
  49    unsigned int rdy:1;
  50    unsigned int ale:1;
  51    unsigned int cle:1;
  52    unsigned int ce:1;
  53};
  54
  55static struct nand_state_t nand_state;
  56static uint64_t nand_read(void *opaque, hwaddr addr, unsigned size)
  57{
  58    struct nand_state_t *s = opaque;
  59    uint32_t r;
  60    int rdy;
  61
  62    r = nand_getio(s->nand);
  63    nand_getpins(s->nand, &rdy);
  64    s->rdy = rdy;
  65
  66    DNAND(printf("%s addr=%x r=%x\n", __func__, addr, r));
  67    return r;
  68}
  69
  70static void
  71nand_write(void *opaque, hwaddr addr, uint64_t value,
  72           unsigned size)
  73{
  74    struct nand_state_t *s = opaque;
  75    int rdy;
  76
  77    DNAND(printf("%s addr=%x v=%x\n", __func__, addr, (unsigned)value));
  78    nand_setpins(s->nand, s->cle, s->ale, s->ce, 1, 0);
  79    nand_setio(s->nand, value);
  80    nand_getpins(s->nand, &rdy);
  81    s->rdy = rdy;
  82}
  83
  84static const MemoryRegionOps nand_ops = {
  85    .read = nand_read,
  86    .write = nand_write,
  87    .endianness = DEVICE_NATIVE_ENDIAN,
  88};
  89
  90struct tempsensor_t
  91{
  92    unsigned int shiftreg;
  93    unsigned int count;
  94    enum {
  95        ST_OUT, ST_IN, ST_Z
  96    } state;
  97
  98    uint16_t regs[3];
  99};
 100
 101static void tempsensor_clkedge(struct tempsensor_t *s,
 102                               unsigned int clk, unsigned int data_in)
 103{
 104    D(printf("%s clk=%d state=%d sr=%x\n", __func__,
 105             clk, s->state, s->shiftreg));
 106    if (s->count == 0) {
 107        s->count = 16;
 108        s->state = ST_OUT;
 109    }
 110    switch (s->state) {
 111        case ST_OUT:
 112            /* Output reg is clocked at negedge.  */
 113            if (!clk) {
 114                s->count--;
 115                s->shiftreg <<= 1;
 116                if (s->count == 0) {
 117                    s->shiftreg = 0;
 118                    s->state = ST_IN;
 119                    s->count = 16;
 120                }
 121            }
 122            break;
 123        case ST_Z:
 124            if (clk) {
 125                s->count--;
 126                if (s->count == 0) {
 127                    s->shiftreg = 0;
 128                    s->state = ST_OUT;
 129                    s->count = 16;
 130                }
 131            }
 132            break;
 133        case ST_IN:
 134            /* Indata is sampled at posedge.  */
 135            if (clk) {
 136                s->count--;
 137                s->shiftreg <<= 1;
 138                s->shiftreg |= data_in & 1;
 139                if (s->count == 0) {
 140                    D(printf("%s cfgreg=%x\n", __func__, s->shiftreg));
 141                    s->regs[0] = s->shiftreg;
 142                    s->state = ST_OUT;
 143                    s->count = 16;
 144
 145                    if ((s->regs[0] & 0xff) == 0) {
 146                        /* 25 degrees celsius.  */
 147                        s->shiftreg = 0x0b9f;
 148                    } else if ((s->regs[0] & 0xff) == 0xff) {
 149                        /* Sensor ID, 0x8100 LM70.  */
 150                        s->shiftreg = 0x8100;
 151                    } else
 152                        printf("Invalid tempsens state %x\n", s->regs[0]);
 153                }
 154            }
 155            break;
 156    }
 157}
 158
 159
 160#define RW_PA_DOUT    0x00
 161#define R_PA_DIN      0x01
 162#define RW_PA_OE      0x02
 163#define RW_PD_DOUT    0x10
 164#define R_PD_DIN      0x11
 165#define RW_PD_OE      0x12
 166
 167static struct gpio_state_t
 168{
 169    MemoryRegion iomem;
 170    struct nand_state_t *nand;
 171    struct tempsensor_t tempsensor;
 172    uint32_t regs[0x5c / 4];
 173} gpio_state;
 174
 175static uint64_t gpio_read(void *opaque, hwaddr addr, unsigned size)
 176{
 177    struct gpio_state_t *s = opaque;
 178    uint32_t r = 0;
 179
 180    addr >>= 2;
 181    switch (addr)
 182    {
 183        case R_PA_DIN:
 184            r = s->regs[RW_PA_DOUT] & s->regs[RW_PA_OE];
 185
 186            /* Encode pins from the nand.  */
 187            r |= s->nand->rdy << 7;
 188            break;
 189        case R_PD_DIN:
 190            r = s->regs[RW_PD_DOUT] & s->regs[RW_PD_OE];
 191
 192            /* Encode temp sensor pins.  */
 193            r |= (!!(s->tempsensor.shiftreg & 0x10000)) << 4;
 194            break;
 195
 196        default:
 197            r = s->regs[addr];
 198            break;
 199    }
 200    return r;
 201    D(printf("%s %x=%x\n", __func__, addr, r));
 202}
 203
 204static void gpio_write(void *opaque, hwaddr addr, uint64_t value,
 205                       unsigned size)
 206{
 207    struct gpio_state_t *s = opaque;
 208    D(printf("%s %x=%x\n", __func__, addr, (unsigned)value));
 209
 210    addr >>= 2;
 211    switch (addr)
 212    {
 213        case RW_PA_DOUT:
 214            /* Decode nand pins.  */
 215            s->nand->ale = !!(value & (1 << 6));
 216            s->nand->cle = !!(value & (1 << 5));
 217            s->nand->ce  = !!(value & (1 << 4));
 218
 219            s->regs[addr] = value;
 220            break;
 221
 222        case RW_PD_DOUT:
 223            /* Temp sensor clk.  */
 224            if ((s->regs[addr] ^ value) & 2)
 225                tempsensor_clkedge(&s->tempsensor, !!(value & 2),
 226                                   !!(value & 16));
 227            s->regs[addr] = value;
 228            break;
 229
 230        default:
 231            s->regs[addr] = value;
 232            break;
 233    }
 234}
 235
 236static const MemoryRegionOps gpio_ops = {
 237    .read = gpio_read,
 238    .write = gpio_write,
 239    .endianness = DEVICE_NATIVE_ENDIAN,
 240    .valid = {
 241        .min_access_size = 4,
 242        .max_access_size = 4,
 243    },
 244};
 245
 246#define INTMEM_SIZE (128 * KiB)
 247
 248static struct cris_load_info li;
 249
 250static
 251void axisdev88_init(MachineState *machine)
 252{
 253    ram_addr_t ram_size = machine->ram_size;
 254    const char *kernel_filename = machine->kernel_filename;
 255    const char *kernel_cmdline = machine->kernel_cmdline;
 256    CRISCPU *cpu;
 257    CPUCRISState *env;
 258    DeviceState *dev;
 259    SysBusDevice *s;
 260    DriveInfo *nand;
 261    qemu_irq irq[30], nmi[2];
 262    void *etraxfs_dmac;
 263    struct etraxfs_dma_client *dma_eth;
 264    int i;
 265    MemoryRegion *address_space_mem = get_system_memory();
 266    MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
 267    MemoryRegion *phys_intmem = g_new(MemoryRegion, 1);
 268
 269    /* init CPUs */
 270    cpu = CRIS_CPU(cpu_create(machine->cpu_type));
 271    env = &cpu->env;
 272
 273    /* allocate RAM */
 274    memory_region_allocate_system_memory(phys_ram, NULL, "axisdev88.ram",
 275                                         ram_size);
 276    memory_region_add_subregion(address_space_mem, 0x40000000, phys_ram);
 277
 278    /* The ETRAX-FS has 128Kb on chip ram, the docs refer to it as the 
 279       internal memory.  */
 280    memory_region_init_ram(phys_intmem, NULL, "axisdev88.chipram",
 281                           INTMEM_SIZE, &error_fatal);
 282    memory_region_add_subregion(address_space_mem, 0x38000000, phys_intmem);
 283
 284      /* Attach a NAND flash to CS1.  */
 285    nand = drive_get(IF_MTD, 0, 0);
 286    nand_state.nand = nand_init(nand ? blk_by_legacy_dinfo(nand) : NULL,
 287                                NAND_MFR_STMICRO, 0x39);
 288    memory_region_init_io(&nand_state.iomem, NULL, &nand_ops, &nand_state,
 289                          "nand", 0x05000000);
 290    memory_region_add_subregion(address_space_mem, 0x10000000,
 291                                &nand_state.iomem);
 292
 293    gpio_state.nand = &nand_state;
 294    memory_region_init_io(&gpio_state.iomem, NULL, &gpio_ops, &gpio_state,
 295                          "gpio", 0x5c);
 296    memory_region_add_subregion(address_space_mem, 0x3001a000,
 297                                &gpio_state.iomem);
 298
 299
 300    dev = qdev_create(NULL, "etraxfs,pic");
 301    /* FIXME: Is there a proper way to signal vectors to the CPU core?  */
 302    qdev_prop_set_ptr(dev, "interrupt_vector", &env->interrupt_vector);
 303    qdev_init_nofail(dev);
 304    s = SYS_BUS_DEVICE(dev);
 305    sysbus_mmio_map(s, 0, 0x3001c000);
 306    sysbus_connect_irq(s, 0, qdev_get_gpio_in(DEVICE(cpu), CRIS_CPU_IRQ));
 307    sysbus_connect_irq(s, 1, qdev_get_gpio_in(DEVICE(cpu), CRIS_CPU_NMI));
 308    for (i = 0; i < 30; i++) {
 309        irq[i] = qdev_get_gpio_in(dev, i);
 310    }
 311    nmi[0] = qdev_get_gpio_in(dev, 30);
 312    nmi[1] = qdev_get_gpio_in(dev, 31);
 313
 314    etraxfs_dmac = etraxfs_dmac_init(0x30000000, 10);
 315    for (i = 0; i < 10; i++) {
 316        /* On ETRAX, odd numbered channels are inputs.  */
 317        etraxfs_dmac_connect(etraxfs_dmac, i, irq + 7 + i, i & 1);
 318    }
 319
 320    /* Add the two ethernet blocks.  */
 321    dma_eth = g_malloc0(sizeof dma_eth[0] * 4); /* Allocate 4 channels.  */
 322    etraxfs_eth_init(&nd_table[0], 0x30034000, 1, &dma_eth[0], &dma_eth[1]);
 323    if (nb_nics > 1) {
 324        etraxfs_eth_init(&nd_table[1], 0x30036000, 2, &dma_eth[2], &dma_eth[3]);
 325    }
 326
 327    /* The DMA Connector block is missing, hardwire things for now.  */
 328    etraxfs_dmac_connect_client(etraxfs_dmac, 0, &dma_eth[0]);
 329    etraxfs_dmac_connect_client(etraxfs_dmac, 1, &dma_eth[1]);
 330    if (nb_nics > 1) {
 331        etraxfs_dmac_connect_client(etraxfs_dmac, 6, &dma_eth[2]);
 332        etraxfs_dmac_connect_client(etraxfs_dmac, 7, &dma_eth[3]);
 333    }
 334
 335    /* 2 timers.  */
 336    sysbus_create_varargs("etraxfs,timer", 0x3001e000, irq[0x1b], nmi[1], NULL);
 337    sysbus_create_varargs("etraxfs,timer", 0x3005e000, irq[0x1b], nmi[1], NULL);
 338
 339    for (i = 0; i < 4; i++) {
 340        etraxfs_ser_create(0x30026000 + i * 0x2000, irq[0x14 + i], serial_hd(i));
 341    }
 342
 343    if (kernel_filename) {
 344        li.image_filename = kernel_filename;
 345        li.cmdline = kernel_cmdline;
 346        cris_load_image(cpu, &li);
 347    } else if (!qtest_enabled()) {
 348        fprintf(stderr, "Kernel image must be specified\n");
 349        exit(1);
 350    }
 351}
 352
 353static void axisdev88_machine_init(MachineClass *mc)
 354{
 355    mc->desc = "AXIS devboard 88";
 356    mc->init = axisdev88_init;
 357    mc->is_default = 1;
 358    mc->default_cpu_type = CRIS_CPU_TYPE_NAME("crisv32");
 359}
 360
 361DEFINE_MACHINE("axis-dev88", axisdev88_machine_init)
 362