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