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10c144e2 EI |
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 | */ | |
4b816985 EI |
24 | |
25 | #include "sysbus.h" | |
10c144e2 EI |
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" |
10c144e2 EI |
35 | |
36 | #define D(x) | |
37 | #define DNAND(x) | |
38 | ||
39 | struct nand_state_t | |
40 | { | |
d4220389 | 41 | DeviceState *nand; |
10c144e2 EI |
42 | unsigned int rdy:1; |
43 | unsigned int ale:1; | |
44 | unsigned int cle:1; | |
45 | unsigned int ce:1; | |
46 | }; | |
47 | ||
48 | static struct nand_state_t nand_state; | |
c227f099 | 49 | static uint32_t nand_readl (void *opaque, target_phys_addr_t addr) |
10c144e2 EI |
50 | { |
51 | struct nand_state_t *s = opaque; | |
52 | uint32_t r; | |
53 | int rdy; | |
54 | ||
55 | r = nand_getio(s->nand); | |
56 | nand_getpins(s->nand, &rdy); | |
57 | s->rdy = rdy; | |
58 | ||
59 | DNAND(printf("%s addr=%x r=%x\n", __func__, addr, r)); | |
60 | return r; | |
61 | } | |
62 | ||
63 | static void | |
c227f099 | 64 | nand_writel (void *opaque, target_phys_addr_t addr, uint32_t value) |
10c144e2 EI |
65 | { |
66 | struct nand_state_t *s = opaque; | |
67 | int rdy; | |
68 | ||
69 | DNAND(printf("%s addr=%x v=%x\n", __func__, addr, value)); | |
70 | nand_setpins(s->nand, s->cle, s->ale, s->ce, 1, 0); | |
71 | nand_setio(s->nand, value); | |
72 | nand_getpins(s->nand, &rdy); | |
73 | s->rdy = rdy; | |
74 | } | |
75 | ||
d60efc6b | 76 | static CPUReadMemoryFunc * const nand_read[] = { |
10c144e2 EI |
77 | &nand_readl, |
78 | &nand_readl, | |
79 | &nand_readl, | |
80 | }; | |
81 | ||
d60efc6b | 82 | static CPUWriteMemoryFunc * const nand_write[] = { |
10c144e2 EI |
83 | &nand_writel, |
84 | &nand_writel, | |
85 | &nand_writel, | |
86 | }; | |
87 | ||
4a1e6bea EI |
88 | |
89 | struct tempsensor_t | |
90 | { | |
91 | unsigned int shiftreg; | |
92 | unsigned int count; | |
93 | enum { | |
94 | ST_OUT, ST_IN, ST_Z | |
95 | } state; | |
96 | ||
97 | uint16_t regs[3]; | |
98 | }; | |
99 | ||
100 | static void tempsensor_clkedge(struct tempsensor_t *s, | |
101 | unsigned int clk, unsigned int data_in) | |
102 | { | |
103 | D(printf("%s clk=%d state=%d sr=%x\n", __func__, | |
104 | clk, s->state, s->shiftreg)); | |
105 | if (s->count == 0) { | |
106 | s->count = 16; | |
107 | s->state = ST_OUT; | |
108 | } | |
109 | switch (s->state) { | |
110 | case ST_OUT: | |
111 | /* Output reg is clocked at negedge. */ | |
112 | if (!clk) { | |
113 | s->count--; | |
114 | s->shiftreg <<= 1; | |
115 | if (s->count == 0) { | |
116 | s->shiftreg = 0; | |
117 | s->state = ST_IN; | |
118 | s->count = 16; | |
119 | } | |
120 | } | |
121 | break; | |
122 | case ST_Z: | |
123 | if (clk) { | |
124 | s->count--; | |
125 | if (s->count == 0) { | |
126 | s->shiftreg = 0; | |
127 | s->state = ST_OUT; | |
128 | s->count = 16; | |
129 | } | |
130 | } | |
131 | break; | |
132 | case ST_IN: | |
133 | /* Indata is sampled at posedge. */ | |
134 | if (clk) { | |
135 | s->count--; | |
136 | s->shiftreg <<= 1; | |
137 | s->shiftreg |= data_in & 1; | |
138 | if (s->count == 0) { | |
139 | D(printf("%s cfgreg=%x\n", __func__, s->shiftreg)); | |
140 | s->regs[0] = s->shiftreg; | |
141 | s->state = ST_OUT; | |
142 | s->count = 16; | |
143 | ||
144 | if ((s->regs[0] & 0xff) == 0) { | |
145 | /* 25 degrees celcius. */ | |
146 | s->shiftreg = 0x0b9f; | |
147 | } else if ((s->regs[0] & 0xff) == 0xff) { | |
148 | /* Sensor ID, 0x8100 LM70. */ | |
149 | s->shiftreg = 0x8100; | |
150 | } else | |
151 | printf("Invalid tempsens state %x\n", s->regs[0]); | |
152 | } | |
153 | } | |
154 | break; | |
155 | } | |
156 | } | |
157 | ||
158 | ||
159 | #define RW_PA_DOUT 0x00 | |
160 | #define R_PA_DIN 0x01 | |
161 | #define RW_PA_OE 0x02 | |
162 | #define RW_PD_DOUT 0x10 | |
163 | #define R_PD_DIN 0x11 | |
164 | #define RW_PD_OE 0x12 | |
165 | ||
166 | static struct gpio_state_t | |
10c144e2 EI |
167 | { |
168 | struct nand_state_t *nand; | |
4a1e6bea | 169 | struct tempsensor_t tempsensor; |
10c144e2 EI |
170 | uint32_t regs[0x5c / 4]; |
171 | } gpio_state; | |
172 | ||
c227f099 | 173 | static uint32_t gpio_readl (void *opaque, target_phys_addr_t addr) |
10c144e2 EI |
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; | |
4a1e6bea EI |
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 | ||
10c144e2 EI |
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 | ||
c227f099 | 202 | static void gpio_writel (void *opaque, target_phys_addr_t addr, uint32_t value) |
10c144e2 EI |
203 | { |
204 | struct gpio_state_t *s = opaque; | |
205 | D(printf("%s %x=%x\n", __func__, addr, 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; | |
4a1e6bea EI |
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 | ||
10c144e2 EI |
227 | default: |
228 | s->regs[addr] = value; | |
229 | break; | |
230 | } | |
231 | } | |
232 | ||
d60efc6b | 233 | static CPUReadMemoryFunc * const gpio_read[] = { |
10c144e2 EI |
234 | NULL, NULL, |
235 | &gpio_readl, | |
236 | }; | |
237 | ||
d60efc6b | 238 | static CPUWriteMemoryFunc * const gpio_write[] = { |
10c144e2 EI |
239 | NULL, NULL, |
240 | &gpio_writel, | |
241 | }; | |
242 | ||
243 | #define INTMEM_SIZE (128 * 1024) | |
244 | ||
77d4f95e | 245 | static struct cris_load_info li; |
409dbce5 | 246 | |
10c144e2 | 247 | static |
c227f099 | 248 | void axisdev88_init (ram_addr_t ram_size, |
ef998233 | 249 | const char *boot_device, |
10c144e2 EI |
250 | const char *kernel_filename, const char *kernel_cmdline, |
251 | const char *initrd_filename, const char *cpu_model) | |
252 | { | |
253 | CPUState *env; | |
fd6dc90b EI |
254 | DeviceState *dev; |
255 | SysBusDevice *s; | |
522f253c | 256 | DriveInfo *nand; |
fd6dc90b | 257 | qemu_irq irq[30], nmi[2], *cpu_irq; |
10c144e2 | 258 | void *etraxfs_dmac; |
1da005b3 | 259 | struct etraxfs_dma_client *dma_eth; |
10c144e2 EI |
260 | int i; |
261 | int nand_regs; | |
262 | int gpio_regs; | |
b0e3d5ac AK |
263 | MemoryRegion *address_space_mem = get_system_memory(); |
264 | MemoryRegion *phys_ram = g_new(MemoryRegion, 1); | |
265 | MemoryRegion *phys_intmem = g_new(MemoryRegion, 1); | |
10c144e2 EI |
266 | |
267 | /* init CPUs */ | |
268 | if (cpu_model == NULL) { | |
269 | cpu_model = "crisv32"; | |
270 | } | |
271 | env = cpu_init(cpu_model); | |
10c144e2 EI |
272 | |
273 | /* allocate RAM */ | |
b0e3d5ac AK |
274 | memory_region_init_ram(phys_ram, NULL, "axisdev88.ram", ram_size); |
275 | memory_region_add_subregion(address_space_mem, 0x40000000, phys_ram); | |
10c144e2 EI |
276 | |
277 | /* The ETRAX-FS has 128Kb on chip ram, the docs refer to it as the | |
278 | internal memory. */ | |
b0e3d5ac AK |
279 | memory_region_init_ram(phys_intmem, NULL, "axisdev88.chipram", INTMEM_SIZE); |
280 | memory_region_add_subregion(address_space_mem, 0x38000000, phys_intmem); | |
10c144e2 EI |
281 | |
282 | /* Attach a NAND flash to CS1. */ | |
522f253c PM |
283 | nand = drive_get(IF_MTD, 0, 0); |
284 | nand_state.nand = nand_init(nand ? nand->bdrv : NULL, | |
285 | NAND_MFR_STMICRO, 0x39); | |
2507c12a AG |
286 | nand_regs = cpu_register_io_memory(nand_read, nand_write, &nand_state, |
287 | DEVICE_NATIVE_ENDIAN); | |
10c144e2 EI |
288 | cpu_register_physical_memory(0x10000000, 0x05000000, nand_regs); |
289 | ||
290 | gpio_state.nand = &nand_state; | |
2507c12a AG |
291 | gpio_regs = cpu_register_io_memory(gpio_read, gpio_write, &gpio_state, |
292 | DEVICE_NATIVE_ENDIAN); | |
4a1e6bea | 293 | cpu_register_physical_memory(0x3001a000, 0x5c, gpio_regs); |
10c144e2 EI |
294 | |
295 | ||
fd6dc90b EI |
296 | cpu_irq = cris_pic_init_cpu(env); |
297 | dev = qdev_create(NULL, "etraxfs,pic"); | |
298 | /* FIXME: Is there a proper way to signal vectors to the CPU core? */ | |
ee6847d1 | 299 | qdev_prop_set_ptr(dev, "interrupt_vector", &env->interrupt_vector); |
e23a1b33 | 300 | qdev_init_nofail(dev); |
fd6dc90b EI |
301 | s = sysbus_from_qdev(dev); |
302 | sysbus_mmio_map(s, 0, 0x3001c000); | |
303 | sysbus_connect_irq(s, 0, cpu_irq[0]); | |
304 | sysbus_connect_irq(s, 1, cpu_irq[1]); | |
305 | for (i = 0; i < 30; i++) { | |
067a3ddc | 306 | irq[i] = qdev_get_gpio_in(dev, i); |
fd6dc90b | 307 | } |
067a3ddc PB |
308 | nmi[0] = qdev_get_gpio_in(dev, 30); |
309 | nmi[1] = qdev_get_gpio_in(dev, 31); | |
73cfd29f | 310 | |
ba494313 | 311 | etraxfs_dmac = etraxfs_dmac_init(0x30000000, 10); |
10c144e2 EI |
312 | for (i = 0; i < 10; i++) { |
313 | /* On ETRAX, odd numbered channels are inputs. */ | |
73cfd29f | 314 | etraxfs_dmac_connect(etraxfs_dmac, i, irq + 7 + i, i & 1); |
10c144e2 EI |
315 | } |
316 | ||
317 | /* Add the two ethernet blocks. */ | |
7267c094 | 318 | dma_eth = g_malloc0(sizeof dma_eth[0] * 4); /* Allocate 4 channels. */ |
1da005b3 EI |
319 | etraxfs_eth_init(&nd_table[0], 0x30034000, 1, &dma_eth[0], &dma_eth[1]); |
320 | if (nb_nics > 1) { | |
321 | etraxfs_eth_init(&nd_table[1], 0x30036000, 2, &dma_eth[2], &dma_eth[3]); | |
322 | } | |
10c144e2 EI |
323 | |
324 | /* The DMA Connector block is missing, hardwire things for now. */ | |
1da005b3 EI |
325 | etraxfs_dmac_connect_client(etraxfs_dmac, 0, &dma_eth[0]); |
326 | etraxfs_dmac_connect_client(etraxfs_dmac, 1, &dma_eth[1]); | |
327 | if (nb_nics > 1) { | |
328 | etraxfs_dmac_connect_client(etraxfs_dmac, 6, &dma_eth[2]); | |
329 | etraxfs_dmac_connect_client(etraxfs_dmac, 7, &dma_eth[3]); | |
10c144e2 EI |
330 | } |
331 | ||
332 | /* 2 timers. */ | |
3b1fd90e EI |
333 | sysbus_create_varargs("etraxfs,timer", 0x3001e000, irq[0x1b], nmi[1], NULL); |
334 | sysbus_create_varargs("etraxfs,timer", 0x3005e000, irq[0x1b], nmi[1], NULL); | |
10c144e2 EI |
335 | |
336 | for (i = 0; i < 4; i++) { | |
4b816985 | 337 | sysbus_create_simple("etraxfs,serial", 0x30026000 + i * 0x2000, |
3b1fd90e | 338 | irq[0x14 + i]); |
10c144e2 EI |
339 | } |
340 | ||
77d4f95e EI |
341 | if (!kernel_filename) { |
342 | fprintf(stderr, "Kernel image must be specified\n"); | |
343 | exit(1); | |
10c144e2 | 344 | } |
77d4f95e EI |
345 | |
346 | li.image_filename = kernel_filename; | |
347 | li.cmdline = kernel_cmdline; | |
348 | cris_load_image(env, &li); | |
10c144e2 EI |
349 | } |
350 | ||
f80f9ec9 | 351 | static QEMUMachine axisdev88_machine = { |
10c144e2 EI |
352 | .name = "axis-dev88", |
353 | .desc = "AXIS devboard 88", | |
354 | .init = axisdev88_init, | |
bbea04df | 355 | .is_default = 1, |
10c144e2 | 356 | }; |
f80f9ec9 AL |
357 | |
358 | static void axisdev88_machine_init(void) | |
359 | { | |
360 | qemu_register_machine(&axisdev88_machine); | |
361 | } | |
362 | ||
363 | machine_init(axisdev88_machine_init); |