hw/cris/axis_dev88.c

   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 "qapi/error.h"
  27 #include "hw/sysbus.h"
  28 #include "net/net.h"
  29 #include "hw/block/flash.h"
  30 #include "hw/boards.h"
  31 #include "hw/cris/etraxfs.h"
  32 #include "hw/loader.h"
  33 #include "elf.h"
  34 #include "boot.h"
  35 #include "sysemu/block-backend.h"
  36 #include "exec/address-spaces.h"
  37 #include "sysemu/qtest.h"
  38
  39 #define D(x)
  40 #define DNAND(x)
  41
  42 struct nand_state_t
  43 {
  44     DeviceState *nand;
  45     MemoryRegion iomem;
  46     unsigned int rdy:1;
  47     unsigned int ale:1;
  48     unsigned int cle:1;
  49     unsigned int ce:1;
  50 };
  51
  52 static struct nand_state_t nand_state;
  53 static uint64_t nand_read(void *opaque, hwaddr addr, unsigned size)
  54 {
  55     struct nand_state_t *s = opaque;
  56     uint32_t r;
  57     int rdy;
  58
  59     r = nand_getio(s->nand);
  60     nand_getpins(s->nand, &rdy);
  61     s->rdy = rdy;
  62
  63     DNAND(printf("%s addr=%x r=%x\n", __func__, addr, r));
  64     return r;
  65 }
  66
  67 static void
  68 nand_write(void *opaque, hwaddr addr, uint64_t value,
  69            unsigned size)
  70 {
  71     struct nand_state_t *s = opaque;
  72     int rdy;
  73
  74     DNAND(printf("%s addr=%x v=%x\n", __func__, addr, (unsigned)value));
  75     nand_setpins(s->nand, s->cle, s->ale, s->ce, 1, 0);
  76     nand_setio(s->nand, value);
  77     nand_getpins(s->nand, &rdy);
  78     s->rdy = rdy;
  79 }
  80
  81 static const MemoryRegionOps nand_ops = {
  82     .read = nand_read,
  83     .write = nand_write,
  84     .endianness = DEVICE_NATIVE_ENDIAN,
  85 };
  86
  87 struct tempsensor_t
  88 {
  89     unsigned int shiftreg;
  90     unsigned int count;
  91     enum {
  92         ST_OUT, ST_IN, ST_Z
  93     } state;
  94
  95     uint16_t regs[3];
  96 };
  97
  98 static void tempsensor_clkedge(struct tempsensor_t *s,
  99                                unsigned int clk, unsigned int data_in)
 100 {
 101     D(printf("%s clk=%d state=%d sr=%x\n", __func__,
 102              clk, s->state, s->shiftreg));
 103     if (s->count == 0) {
 104         s->count = 16;
 105         s->state = ST_OUT;
 106     }
 107     switch (s->state) {
 108         case ST_OUT:
 109             /* Output reg is clocked at negedge.  */
 110             if (!clk) {
 111                 s->count--;
 112                 s->shiftreg <<= 1;
 113                 if (s->count == 0) {
 114                     s->shiftreg = 0;
 115                     s->state = ST_IN;
 116                     s->count = 16;
 117                 }
 118             }
 119             break;
 120         case ST_Z:
 121             if (clk) {
 122                 s->count--;
 123                 if (s->count == 0) {
 124                     s->shiftreg = 0;
 125                     s->state = ST_OUT;
 126                     s->count = 16;
 127                 }
 128             }
 129             break;
 130         case ST_IN:
 131             /* Indata is sampled at posedge.  */
 132             if (clk) {
 133                 s->count--;
 134                 s->shiftreg <<= 1;
 135                 s->shiftreg |= data_in & 1;
 136                 if (s->count == 0) {
 137                     D(printf("%s cfgreg=%x\n", __func__, s->shiftreg));
 138                     s->regs[0] = s->shiftreg;
 139                     s->state = ST_OUT;
 140                     s->count = 16;
 141
 142                     if ((s->regs[0] & 0xff) == 0) {
 143                         /* 25 degrees celsius.  */
 144                         s->shiftreg = 0x0b9f;
 145                     } else if ((s->regs[0] & 0xff) == 0xff) {
 146                         /* Sensor ID, 0x8100 LM70.  */
 147                         s->shiftreg = 0x8100;
 148                     } else
 149                         printf("Invalid tempsens state %x\n", s->regs[0]);
 150                 }
 151             }
 152             break;
 153     }
 154 }
 155
 156
 157 #define RW_PA_DOUT    0x00
 158 #define R_PA_DIN      0x01
 159 #define RW_PA_OE      0x02
 160 #define RW_PD_DOUT    0x10
 161 #define R_PD_DIN      0x11
 162 #define RW_PD_OE      0x12
 163
 164 static struct gpio_state_t
 165 {
 166     MemoryRegion iomem;
 167     struct nand_state_t *nand;
 168     struct tempsensor_t tempsensor;
 169     uint32_t regs[0x5c / 4];
 170 } gpio_state;
 171
 172 static uint64_t gpio_read(void *opaque, hwaddr addr, unsigned size)
 173 {
 174     struct gpio_state_t *s = opaque;
 175     uint32_t r = 0;
 176
 177     addr >>= 2;
 178     switch (addr)
 179     {
 180         case R_PA_DIN:
 181             r = s->regs[RW_PA_DOUT] & s->regs[RW_PA_OE];
 182
 183             /* Encode pins from the nand.  */
 184             r |= s->nand->rdy << 7;
 185             break;
 186         case R_PD_DIN:
 187             r = s->regs[RW_PD_DOUT] & s->regs[RW_PD_OE];
 188
 189             /* Encode temp sensor pins.  */
 190             r |= (!!(s->tempsensor.shiftreg & 0x10000)) << 4;
 191             break;
 192
 193         default:
 194             r = s->regs[addr];
 195             break;
 196     }
 197     return r;
 198     D(printf("%s %x=%x\n", __func__, addr, r));
 199 }
 200
 201 static void gpio_write(void *opaque, hwaddr addr, uint64_t value,
 202                        unsigned size)
 203 {
 204     struct gpio_state_t *s = opaque;
 205     D(printf("%s %x=%x\n", __func__, addr, (unsigned)value));
 206
 207     addr >>= 2;
 208     switch (addr)
 209     {
 210         case RW_PA_DOUT:
 211             /* Decode nand pins.  */
 212             s->nand->ale = !!(value & (1 << 6));
 213             s->nand->cle = !!(value & (1 << 5));
 214             s->nand->ce  = !!(value & (1 << 4));
 215
 216             s->regs[addr] = value;
 217             break;
 218
 219         case RW_PD_DOUT:
 220             /* Temp sensor clk.  */
 221             if ((s->regs[addr] ^ value) & 2)
 222                 tempsensor_clkedge(&s->tempsensor, !!(value & 2),
 223                                    !!(value & 16));
 224             s->regs[addr] = value;
 225             break;
 226
 227         default:
 228             s->regs[addr] = value;
 229             break;
 230     }
 231 }
 232
 233 static const MemoryRegionOps gpio_ops = {
 234     .read = gpio_read,
 235     .write = gpio_write,
 236     .endianness = DEVICE_NATIVE_ENDIAN,
 237     .valid = {
 238         .min_access_size = 4,
 239         .max_access_size = 4,
 240     },
 241 };
 242
 243 #define INTMEM_SIZE (128 * 1024)
 244
 245 static struct cris_load_info li;
 246
 247 static
 248 void axisdev88_init(MachineState *machine)
 249 {
 250     ram_addr_t ram_size = machine->ram_size;
 251     const char *cpu_model = machine->cpu_model;
 252     const char *kernel_filename = machine->kernel_filename;
 253     const char *kernel_cmdline = machine->kernel_cmdline;
 254     CRISCPU *cpu;
 255     CPUCRISState *env;
 256     DeviceState *dev;
 257     SysBusDevice *s;
 258     DriveInfo *nand;
 259     qemu_irq irq[30], nmi[2];
 260     void *etraxfs_dmac;
 261     struct etraxfs_dma_client *dma_eth;
 262     int i;
 263     MemoryRegion *address_space_mem = get_system_memory();
 264     MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
 265     MemoryRegion *phys_intmem = g_new(MemoryRegion, 1);
 266
 267     /* init CPUs */
 268     if (cpu_model == NULL) {
 269         cpu_model = "crisv32";
 270     }
 271     cpu = cpu_cris_init(cpu_model);
 272     env = &cpu->env;
 273
 274     /* allocate RAM */
 275     memory_region_allocate_system_memory(phys_ram, NULL, "axisdev88.ram",
 276                                          ram_size);
 277     memory_region_add_subregion(address_space_mem, 0x40000000, phys_ram);
 278
 279     /* The ETRAX-FS has 128Kb on chip ram, the docs refer to it as the
 280        internal memory.  */
 281     memory_region_init_ram(phys_intmem, NULL, "axisdev88.chipram", INTMEM_SIZE,
 282                            &error_fatal);
 283     vmstate_register_ram_global(phys_intmem);
 284     memory_region_add_subregion(address_space_mem, 0x38000000, phys_intmem);
 285
 286       /* Attach a NAND flash to CS1.  */
 287     nand = drive_get(IF_MTD, 0, 0);
 288     nand_state.nand = nand_init(nand ? blk_by_legacy_dinfo(nand) : NULL,
 289                                 NAND_MFR_STMICRO, 0x39);
 290     memory_region_init_io(&nand_state.iomem, NULL, &nand_ops, &nand_state,
 291                           "nand", 0x05000000);
 292     memory_region_add_subregion(address_space_mem, 0x10000000,
 293                                 &nand_state.iomem);
 294
 295     gpio_state.nand = &nand_state;
 296     memory_region_init_io(&gpio_state.iomem, NULL, &gpio_ops, &gpio_state,
 297                           "gpio", 0x5c);
 298     memory_region_add_subregion(address_space_mem, 0x3001a000,
 299                                 &gpio_state.iomem);
 300
 301
 302     dev = qdev_create(NULL, "etraxfs,pic");
 303     /* FIXME: Is there a proper way to signal vectors to the CPU core?  */
 304     qdev_prop_set_ptr(dev, "interrupt_vector", &env->interrupt_vector);
 305     qdev_init_nofail(dev);
 306     s = SYS_BUS_DEVICE(dev);
 307     sysbus_mmio_map(s, 0, 0x3001c000);
 308     sysbus_connect_irq(s, 0, qdev_get_gpio_in(DEVICE(cpu), CRIS_CPU_IRQ));
 309     sysbus_connect_irq(s, 1, qdev_get_gpio_in(DEVICE(cpu), CRIS_CPU_NMI));
 310     for (i = 0; i < 30; i++) {
 311         irq[i] = qdev_get_gpio_in(dev, i);
 312     }
 313     nmi[0] = qdev_get_gpio_in(dev, 30);
 314     nmi[1] = qdev_get_gpio_in(dev, 31);
 315
 316     etraxfs_dmac = etraxfs_dmac_init(0x30000000, 10);
 317     for (i = 0; i < 10; i++) {
 318         /* On ETRAX, odd numbered channels are inputs.  */
 319         etraxfs_dmac_connect(etraxfs_dmac, i, irq + 7 + i, i & 1);
 320     }
 321
 322     /* Add the two ethernet blocks.  */
 323     dma_eth = g_malloc0(sizeof dma_eth[0] * 4); /* Allocate 4 channels.  */
 324     etraxfs_eth_init(&nd_table[0], 0x30034000, 1, &dma_eth[0], &dma_eth[1]);
 325     if (nb_nics > 1) {
 326         etraxfs_eth_init(&nd_table[1], 0x30036000, 2, &dma_eth[2], &dma_eth[3]);
 327     }
 328
 329     /* The DMA Connector block is missing, hardwire things for now.  */
 330     etraxfs_dmac_connect_client(etraxfs_dmac, 0, &dma_eth[0]);
 331     etraxfs_dmac_connect_client(etraxfs_dmac, 1, &dma_eth[1]);
 332     if (nb_nics > 1) {
 333         etraxfs_dmac_connect_client(etraxfs_dmac, 6, &dma_eth[2]);
 334         etraxfs_dmac_connect_client(etraxfs_dmac, 7, &dma_eth[3]);
 335     }
 336
 337     /* 2 timers.  */
 338     sysbus_create_varargs("etraxfs,timer", 0x3001e000, irq[0x1b], nmi[1], NULL);
 339     sysbus_create_varargs("etraxfs,timer", 0x3005e000, irq[0x1b], nmi[1], NULL);
 340
 341     for (i = 0; i < 4; i++) {
 342         sysbus_create_simple("etraxfs,serial", 0x30026000 + i * 0x2000,
 343                              irq[0x14 + i]);
 344     }
 345
 346     if (kernel_filename) {
 347         li.image_filename = kernel_filename;
 348         li.cmdline = kernel_cmdline;
 349         cris_load_image(cpu, &li);
 350     } else if (!qtest_enabled()) {
 351         fprintf(stderr, "Kernel image must be specified\n");
 352         exit(1);
 353     }
 354 }
 355
 356 static void axisdev88_machine_init(MachineClass *mc)
 357 {
 358     mc->desc = "AXIS devboard 88";
 359     mc->init = axisdev88_init;
 360     mc->is_default = 1;
 361 }
 362
 363 DEFINE_MACHINE("axis-dev88", axisdev88_machine_init)