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10c144e2
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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 */
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24
25#include "sysbus.h"
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26#include "net.h"
27#include "flash.h"
10c144e2 28#include "boards.h"
10c144e2 29#include "etraxfs.h"
ca20cf32
BS
30#include "loader.h"
31#include "elf.h"
77d4f95e 32#include "cris-boot.h"
522f253c 33#include "blockdev.h"
b0e3d5ac 34#include "exec-memory.h"
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35
36#define D(x)
37#define DNAND(x)
38
39struct nand_state_t
40{
d4220389 41 DeviceState *nand;
838335ec 42 MemoryRegion iomem;
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43 unsigned int rdy:1;
44 unsigned int ale:1;
45 unsigned int cle:1;
46 unsigned int ce:1;
47};
48
49static struct nand_state_t nand_state;
838335ec 50static uint64_t nand_read(void *opaque, target_phys_addr_t addr, unsigned size)
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51{
52 struct nand_state_t *s = opaque;
53 uint32_t r;
54 int rdy;
55
56 r = nand_getio(s->nand);
57 nand_getpins(s->nand, &rdy);
58 s->rdy = rdy;
59
60 DNAND(printf("%s addr=%x r=%x\n", __func__, addr, r));
61 return r;
62}
63
64static void
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65nand_write(void *opaque, target_phys_addr_t addr, uint64_t value,
66 unsigned size)
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67{
68 struct nand_state_t *s = opaque;
69 int rdy;
70
838335ec 71 DNAND(printf("%s addr=%x v=%x\n", __func__, addr, (unsigned)value));
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72 nand_setpins(s->nand, s->cle, s->ale, s->ce, 1, 0);
73 nand_setio(s->nand, value);
74 nand_getpins(s->nand, &rdy);
75 s->rdy = rdy;
76}
77
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78static const MemoryRegionOps nand_ops = {
79 .read = nand_read,
80 .write = nand_write,
81 .endianness = DEVICE_NATIVE_ENDIAN,
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82};
83
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84struct tempsensor_t
85{
86 unsigned int shiftreg;
87 unsigned int count;
88 enum {
89 ST_OUT, ST_IN, ST_Z
90 } state;
91
92 uint16_t regs[3];
93};
94
95static void tempsensor_clkedge(struct tempsensor_t *s,
96 unsigned int clk, unsigned int data_in)
97{
98 D(printf("%s clk=%d state=%d sr=%x\n", __func__,
99 clk, s->state, s->shiftreg));
100 if (s->count == 0) {
101 s->count = 16;
102 s->state = ST_OUT;
103 }
104 switch (s->state) {
105 case ST_OUT:
106 /* Output reg is clocked at negedge. */
107 if (!clk) {
108 s->count--;
109 s->shiftreg <<= 1;
110 if (s->count == 0) {
111 s->shiftreg = 0;
112 s->state = ST_IN;
113 s->count = 16;
114 }
115 }
116 break;
117 case ST_Z:
118 if (clk) {
119 s->count--;
120 if (s->count == 0) {
121 s->shiftreg = 0;
122 s->state = ST_OUT;
123 s->count = 16;
124 }
125 }
126 break;
127 case ST_IN:
128 /* Indata is sampled at posedge. */
129 if (clk) {
130 s->count--;
131 s->shiftreg <<= 1;
132 s->shiftreg |= data_in & 1;
133 if (s->count == 0) {
134 D(printf("%s cfgreg=%x\n", __func__, s->shiftreg));
135 s->regs[0] = s->shiftreg;
136 s->state = ST_OUT;
137 s->count = 16;
138
139 if ((s->regs[0] & 0xff) == 0) {
140 /* 25 degrees celcius. */
141 s->shiftreg = 0x0b9f;
142 } else if ((s->regs[0] & 0xff) == 0xff) {
143 /* Sensor ID, 0x8100 LM70. */
144 s->shiftreg = 0x8100;
145 } else
146 printf("Invalid tempsens state %x\n", s->regs[0]);
147 }
148 }
149 break;
150 }
151}
152
153
154#define RW_PA_DOUT 0x00
155#define R_PA_DIN 0x01
156#define RW_PA_OE 0x02
157#define RW_PD_DOUT 0x10
158#define R_PD_DIN 0x11
159#define RW_PD_OE 0x12
160
161static struct gpio_state_t
10c144e2 162{
838335ec 163 MemoryRegion iomem;
10c144e2 164 struct nand_state_t *nand;
4a1e6bea 165 struct tempsensor_t tempsensor;
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166 uint32_t regs[0x5c / 4];
167} gpio_state;
168
838335ec 169static uint64_t gpio_read(void *opaque, target_phys_addr_t addr, unsigned size)
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170{
171 struct gpio_state_t *s = opaque;
172 uint32_t r = 0;
173
174 addr >>= 2;
175 switch (addr)
176 {
177 case R_PA_DIN:
178 r = s->regs[RW_PA_DOUT] & s->regs[RW_PA_OE];
179
180 /* Encode pins from the nand. */
181 r |= s->nand->rdy << 7;
182 break;
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183 case R_PD_DIN:
184 r = s->regs[RW_PD_DOUT] & s->regs[RW_PD_OE];
185
186 /* Encode temp sensor pins. */
187 r |= (!!(s->tempsensor.shiftreg & 0x10000)) << 4;
188 break;
189
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190 default:
191 r = s->regs[addr];
192 break;
193 }
194 return r;
195 D(printf("%s %x=%x\n", __func__, addr, r));
196}
197
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198static void gpio_write(void *opaque, target_phys_addr_t addr, uint64_t value,
199 unsigned size)
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200{
201 struct gpio_state_t *s = opaque;
838335ec 202 D(printf("%s %x=%x\n", __func__, addr, (unsigned)value));
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203
204 addr >>= 2;
205 switch (addr)
206 {
207 case RW_PA_DOUT:
208 /* Decode nand pins. */
209 s->nand->ale = !!(value & (1 << 6));
210 s->nand->cle = !!(value & (1 << 5));
211 s->nand->ce = !!(value & (1 << 4));
212
213 s->regs[addr] = value;
214 break;
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215
216 case RW_PD_DOUT:
217 /* Temp sensor clk. */
218 if ((s->regs[addr] ^ value) & 2)
219 tempsensor_clkedge(&s->tempsensor, !!(value & 2),
220 !!(value & 16));
221 s->regs[addr] = value;
222 break;
223
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224 default:
225 s->regs[addr] = value;
226 break;
227 }
228}
229
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230static const MemoryRegionOps gpio_ops = {
231 .read = gpio_read,
232 .write = gpio_write,
233 .endianness = DEVICE_NATIVE_ENDIAN,
234 .valid = {
235 .min_access_size = 4,
236 .max_access_size = 4,
237 },
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238};
239
240#define INTMEM_SIZE (128 * 1024)
241
77d4f95e 242static struct cris_load_info li;
409dbce5 243
10c144e2 244static
c227f099 245void axisdev88_init (ram_addr_t ram_size,
ef998233 246 const char *boot_device,
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247 const char *kernel_filename, const char *kernel_cmdline,
248 const char *initrd_filename, const char *cpu_model)
249{
250 CPUState *env;
fd6dc90b
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251 DeviceState *dev;
252 SysBusDevice *s;
522f253c 253 DriveInfo *nand;
fd6dc90b 254 qemu_irq irq[30], nmi[2], *cpu_irq;
10c144e2 255 void *etraxfs_dmac;
1da005b3 256 struct etraxfs_dma_client *dma_eth;
10c144e2 257 int i;
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258 MemoryRegion *address_space_mem = get_system_memory();
259 MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
260 MemoryRegion *phys_intmem = g_new(MemoryRegion, 1);
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261
262 /* init CPUs */
263 if (cpu_model == NULL) {
264 cpu_model = "crisv32";
265 }
266 env = cpu_init(cpu_model);
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267
268 /* allocate RAM */
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269 memory_region_init_ram(phys_ram, "axisdev88.ram", ram_size);
270 vmstate_register_ram_global(phys_ram);
b0e3d5ac 271 memory_region_add_subregion(address_space_mem, 0x40000000, phys_ram);
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272
273 /* The ETRAX-FS has 128Kb on chip ram, the docs refer to it as the
274 internal memory. */
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275 memory_region_init_ram(phys_intmem, "axisdev88.chipram", INTMEM_SIZE);
276 vmstate_register_ram_global(phys_intmem);
b0e3d5ac 277 memory_region_add_subregion(address_space_mem, 0x38000000, phys_intmem);
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278
279 /* Attach a NAND flash to CS1. */
522f253c
PM
280 nand = drive_get(IF_MTD, 0, 0);
281 nand_state.nand = nand_init(nand ? nand->bdrv : NULL,
282 NAND_MFR_STMICRO, 0x39);
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283 memory_region_init_io(&nand_state.iomem, &nand_ops, &nand_state,
284 "nand", 0x05000000);
285 memory_region_add_subregion(address_space_mem, 0x10000000,
286 &nand_state.iomem);
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287
288 gpio_state.nand = &nand_state;
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289 memory_region_init_io(&gpio_state.iomem, &gpio_ops, &gpio_state,
290 "gpio", 0x5c);
291 memory_region_add_subregion(address_space_mem, 0x3001a000,
292 &gpio_state.iomem);
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293
294
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295 cpu_irq = cris_pic_init_cpu(env);
296 dev = qdev_create(NULL, "etraxfs,pic");
297 /* FIXME: Is there a proper way to signal vectors to the CPU core? */
ee6847d1 298 qdev_prop_set_ptr(dev, "interrupt_vector", &env->interrupt_vector);
e23a1b33 299 qdev_init_nofail(dev);
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300 s = sysbus_from_qdev(dev);
301 sysbus_mmio_map(s, 0, 0x3001c000);
302 sysbus_connect_irq(s, 0, cpu_irq[0]);
303 sysbus_connect_irq(s, 1, cpu_irq[1]);
304 for (i = 0; i < 30; i++) {
067a3ddc 305 irq[i] = qdev_get_gpio_in(dev, i);
fd6dc90b 306 }
067a3ddc
PB
307 nmi[0] = qdev_get_gpio_in(dev, 30);
308 nmi[1] = qdev_get_gpio_in(dev, 31);
73cfd29f 309
ba494313 310 etraxfs_dmac = etraxfs_dmac_init(0x30000000, 10);
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311 for (i = 0; i < 10; i++) {
312 /* On ETRAX, odd numbered channels are inputs. */
73cfd29f 313 etraxfs_dmac_connect(etraxfs_dmac, i, irq + 7 + i, i & 1);
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314 }
315
316 /* Add the two ethernet blocks. */
7267c094 317 dma_eth = g_malloc0(sizeof dma_eth[0] * 4); /* Allocate 4 channels. */
1da005b3
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318 etraxfs_eth_init(&nd_table[0], 0x30034000, 1, &dma_eth[0], &dma_eth[1]);
319 if (nb_nics > 1) {
320 etraxfs_eth_init(&nd_table[1], 0x30036000, 2, &dma_eth[2], &dma_eth[3]);
321 }
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322
323 /* The DMA Connector block is missing, hardwire things for now. */
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324 etraxfs_dmac_connect_client(etraxfs_dmac, 0, &dma_eth[0]);
325 etraxfs_dmac_connect_client(etraxfs_dmac, 1, &dma_eth[1]);
326 if (nb_nics > 1) {
327 etraxfs_dmac_connect_client(etraxfs_dmac, 6, &dma_eth[2]);
328 etraxfs_dmac_connect_client(etraxfs_dmac, 7, &dma_eth[3]);
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329 }
330
331 /* 2 timers. */
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332 sysbus_create_varargs("etraxfs,timer", 0x3001e000, irq[0x1b], nmi[1], NULL);
333 sysbus_create_varargs("etraxfs,timer", 0x3005e000, irq[0x1b], nmi[1], NULL);
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334
335 for (i = 0; i < 4; i++) {
4b816985 336 sysbus_create_simple("etraxfs,serial", 0x30026000 + i * 0x2000,
3b1fd90e 337 irq[0x14 + i]);
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338 }
339
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340 if (!kernel_filename) {
341 fprintf(stderr, "Kernel image must be specified\n");
342 exit(1);
10c144e2 343 }
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344
345 li.image_filename = kernel_filename;
346 li.cmdline = kernel_cmdline;
347 cris_load_image(env, &li);
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348}
349
f80f9ec9 350static QEMUMachine axisdev88_machine = {
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351 .name = "axis-dev88",
352 .desc = "AXIS devboard 88",
353 .init = axisdev88_init,
bbea04df 354 .is_default = 1,
10c144e2 355};
f80f9ec9
AL
356
357static void axisdev88_machine_init(void)
358{
359 qemu_register_machine(&axisdev88_machine);
360}
361
362machine_init(axisdev88_machine_init);