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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" |
4b816985 | 29 | #include "sysemu.h" |
10c144e2 | 30 | #include "etraxfs.h" |
ca20cf32 BS |
31 | #include "loader.h" |
32 | #include "elf.h" | |
77d4f95e | 33 | #include "cris-boot.h" |
10c144e2 EI |
34 | |
35 | #define D(x) | |
36 | #define DNAND(x) | |
37 | ||
38 | struct nand_state_t | |
39 | { | |
bc24a225 | 40 | NANDFlashState *nand; |
10c144e2 EI |
41 | unsigned int rdy:1; |
42 | unsigned int ale:1; | |
43 | unsigned int cle:1; | |
44 | unsigned int ce:1; | |
45 | }; | |
46 | ||
47 | static struct nand_state_t nand_state; | |
c227f099 | 48 | static uint32_t nand_readl (void *opaque, target_phys_addr_t addr) |
10c144e2 EI |
49 | { |
50 | struct nand_state_t *s = opaque; | |
51 | uint32_t r; | |
52 | int rdy; | |
53 | ||
54 | r = nand_getio(s->nand); | |
55 | nand_getpins(s->nand, &rdy); | |
56 | s->rdy = rdy; | |
57 | ||
58 | DNAND(printf("%s addr=%x r=%x\n", __func__, addr, r)); | |
59 | return r; | |
60 | } | |
61 | ||
62 | static void | |
c227f099 | 63 | nand_writel (void *opaque, target_phys_addr_t addr, uint32_t value) |
10c144e2 EI |
64 | { |
65 | struct nand_state_t *s = opaque; | |
66 | int rdy; | |
67 | ||
68 | DNAND(printf("%s addr=%x v=%x\n", __func__, addr, value)); | |
69 | nand_setpins(s->nand, s->cle, s->ale, s->ce, 1, 0); | |
70 | nand_setio(s->nand, value); | |
71 | nand_getpins(s->nand, &rdy); | |
72 | s->rdy = rdy; | |
73 | } | |
74 | ||
d60efc6b | 75 | static CPUReadMemoryFunc * const nand_read[] = { |
10c144e2 EI |
76 | &nand_readl, |
77 | &nand_readl, | |
78 | &nand_readl, | |
79 | }; | |
80 | ||
d60efc6b | 81 | static CPUWriteMemoryFunc * const nand_write[] = { |
10c144e2 EI |
82 | &nand_writel, |
83 | &nand_writel, | |
84 | &nand_writel, | |
85 | }; | |
86 | ||
4a1e6bea EI |
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 celcius. */ | |
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 | |
10c144e2 EI |
166 | { |
167 | struct nand_state_t *nand; | |
4a1e6bea | 168 | struct tempsensor_t tempsensor; |
10c144e2 EI |
169 | uint32_t regs[0x5c / 4]; |
170 | } gpio_state; | |
171 | ||
c227f099 | 172 | static uint32_t gpio_readl (void *opaque, target_phys_addr_t addr) |
10c144e2 EI |
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; | |
4a1e6bea EI |
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 | ||
10c144e2 EI |
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 | ||
c227f099 | 201 | static void gpio_writel (void *opaque, target_phys_addr_t addr, uint32_t value) |
10c144e2 EI |
202 | { |
203 | struct gpio_state_t *s = opaque; | |
204 | D(printf("%s %x=%x\n", __func__, addr, value)); | |
205 | ||
206 | addr >>= 2; | |
207 | switch (addr) | |
208 | { | |
209 | case RW_PA_DOUT: | |
210 | /* Decode nand pins. */ | |
211 | s->nand->ale = !!(value & (1 << 6)); | |
212 | s->nand->cle = !!(value & (1 << 5)); | |
213 | s->nand->ce = !!(value & (1 << 4)); | |
214 | ||
215 | s->regs[addr] = value; | |
216 | break; | |
4a1e6bea EI |
217 | |
218 | case RW_PD_DOUT: | |
219 | /* Temp sensor clk. */ | |
220 | if ((s->regs[addr] ^ value) & 2) | |
221 | tempsensor_clkedge(&s->tempsensor, !!(value & 2), | |
222 | !!(value & 16)); | |
223 | s->regs[addr] = value; | |
224 | break; | |
225 | ||
10c144e2 EI |
226 | default: |
227 | s->regs[addr] = value; | |
228 | break; | |
229 | } | |
230 | } | |
231 | ||
d60efc6b | 232 | static CPUReadMemoryFunc * const gpio_read[] = { |
10c144e2 EI |
233 | NULL, NULL, |
234 | &gpio_readl, | |
235 | }; | |
236 | ||
d60efc6b | 237 | static CPUWriteMemoryFunc * const gpio_write[] = { |
10c144e2 EI |
238 | NULL, NULL, |
239 | &gpio_writel, | |
240 | }; | |
241 | ||
242 | #define INTMEM_SIZE (128 * 1024) | |
243 | ||
77d4f95e | 244 | static struct cris_load_info li; |
409dbce5 | 245 | |
10c144e2 | 246 | static |
c227f099 | 247 | void axisdev88_init (ram_addr_t ram_size, |
ef998233 | 248 | const char *boot_device, |
10c144e2 EI |
249 | const char *kernel_filename, const char *kernel_cmdline, |
250 | const char *initrd_filename, const char *cpu_model) | |
251 | { | |
252 | CPUState *env; | |
fd6dc90b EI |
253 | DeviceState *dev; |
254 | SysBusDevice *s; | |
255 | qemu_irq irq[30], nmi[2], *cpu_irq; | |
10c144e2 EI |
256 | void *etraxfs_dmac; |
257 | struct etraxfs_dma_client *eth[2] = {NULL, NULL}; | |
10c144e2 EI |
258 | int i; |
259 | int nand_regs; | |
260 | int gpio_regs; | |
c227f099 AL |
261 | ram_addr_t phys_ram; |
262 | ram_addr_t phys_intmem; | |
10c144e2 EI |
263 | |
264 | /* init CPUs */ | |
265 | if (cpu_model == NULL) { | |
266 | cpu_model = "crisv32"; | |
267 | } | |
268 | env = cpu_init(cpu_model); | |
10c144e2 EI |
269 | |
270 | /* allocate RAM */ | |
271 | phys_ram = qemu_ram_alloc(ram_size); | |
272 | cpu_register_physical_memory(0x40000000, ram_size, phys_ram | IO_MEM_RAM); | |
273 | ||
274 | /* The ETRAX-FS has 128Kb on chip ram, the docs refer to it as the | |
275 | internal memory. */ | |
276 | phys_intmem = qemu_ram_alloc(INTMEM_SIZE); | |
277 | cpu_register_physical_memory(0x38000000, INTMEM_SIZE, | |
278 | phys_intmem | IO_MEM_RAM); | |
279 | ||
280 | ||
281 | /* Attach a NAND flash to CS1. */ | |
4a1e6bea | 282 | nand_state.nand = nand_init(NAND_MFR_STMICRO, 0x39); |
1eed09cb | 283 | nand_regs = cpu_register_io_memory(nand_read, nand_write, &nand_state); |
10c144e2 EI |
284 | cpu_register_physical_memory(0x10000000, 0x05000000, nand_regs); |
285 | ||
286 | gpio_state.nand = &nand_state; | |
1eed09cb | 287 | gpio_regs = cpu_register_io_memory(gpio_read, gpio_write, &gpio_state); |
4a1e6bea | 288 | cpu_register_physical_memory(0x3001a000, 0x5c, gpio_regs); |
10c144e2 EI |
289 | |
290 | ||
fd6dc90b EI |
291 | cpu_irq = cris_pic_init_cpu(env); |
292 | dev = qdev_create(NULL, "etraxfs,pic"); | |
293 | /* FIXME: Is there a proper way to signal vectors to the CPU core? */ | |
ee6847d1 | 294 | qdev_prop_set_ptr(dev, "interrupt_vector", &env->interrupt_vector); |
e23a1b33 | 295 | qdev_init_nofail(dev); |
fd6dc90b EI |
296 | s = sysbus_from_qdev(dev); |
297 | sysbus_mmio_map(s, 0, 0x3001c000); | |
298 | sysbus_connect_irq(s, 0, cpu_irq[0]); | |
299 | sysbus_connect_irq(s, 1, cpu_irq[1]); | |
300 | for (i = 0; i < 30; i++) { | |
067a3ddc | 301 | irq[i] = qdev_get_gpio_in(dev, i); |
fd6dc90b | 302 | } |
067a3ddc PB |
303 | nmi[0] = qdev_get_gpio_in(dev, 30); |
304 | nmi[1] = qdev_get_gpio_in(dev, 31); | |
73cfd29f | 305 | |
ba494313 | 306 | etraxfs_dmac = etraxfs_dmac_init(0x30000000, 10); |
10c144e2 EI |
307 | for (i = 0; i < 10; i++) { |
308 | /* On ETRAX, odd numbered channels are inputs. */ | |
73cfd29f | 309 | etraxfs_dmac_connect(etraxfs_dmac, i, irq + 7 + i, i & 1); |
10c144e2 EI |
310 | } |
311 | ||
312 | /* Add the two ethernet blocks. */ | |
ba494313 | 313 | eth[0] = etraxfs_eth_init(&nd_table[0], 0x30034000, 1); |
0ae18cee | 314 | if (nb_nics > 1) |
ba494313 | 315 | eth[1] = etraxfs_eth_init(&nd_table[1], 0x30036000, 2); |
10c144e2 EI |
316 | |
317 | /* The DMA Connector block is missing, hardwire things for now. */ | |
318 | etraxfs_dmac_connect_client(etraxfs_dmac, 0, eth[0]); | |
319 | etraxfs_dmac_connect_client(etraxfs_dmac, 1, eth[0] + 1); | |
320 | if (eth[1]) { | |
321 | etraxfs_dmac_connect_client(etraxfs_dmac, 6, eth[1]); | |
322 | etraxfs_dmac_connect_client(etraxfs_dmac, 7, eth[1] + 1); | |
323 | } | |
324 | ||
325 | /* 2 timers. */ | |
3b1fd90e EI |
326 | sysbus_create_varargs("etraxfs,timer", 0x3001e000, irq[0x1b], nmi[1], NULL); |
327 | sysbus_create_varargs("etraxfs,timer", 0x3005e000, irq[0x1b], nmi[1], NULL); | |
10c144e2 EI |
328 | |
329 | for (i = 0; i < 4; i++) { | |
4b816985 | 330 | sysbus_create_simple("etraxfs,serial", 0x30026000 + i * 0x2000, |
3b1fd90e | 331 | irq[0x14 + i]); |
10c144e2 EI |
332 | } |
333 | ||
77d4f95e EI |
334 | if (!kernel_filename) { |
335 | fprintf(stderr, "Kernel image must be specified\n"); | |
336 | exit(1); | |
10c144e2 | 337 | } |
77d4f95e EI |
338 | |
339 | li.image_filename = kernel_filename; | |
340 | li.cmdline = kernel_cmdline; | |
341 | cris_load_image(env, &li); | |
10c144e2 EI |
342 | } |
343 | ||
f80f9ec9 | 344 | static QEMUMachine axisdev88_machine = { |
10c144e2 EI |
345 | .name = "axis-dev88", |
346 | .desc = "AXIS devboard 88", | |
347 | .init = axisdev88_init, | |
10c144e2 | 348 | }; |
f80f9ec9 AL |
349 | |
350 | static void axisdev88_machine_init(void) | |
351 | { | |
352 | qemu_register_machine(&axisdev88_machine); | |
353 | } | |
354 | ||
355 | machine_init(axisdev88_machine_init); |