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Commit | Line | Data |
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c1713132 AZ |
1 | /* |
2 | * Intel XScale PXA255/270 GPIO controller emulation. | |
3 | * | |
4 | * Copyright (c) 2006 Openedhand Ltd. | |
5 | * Written by Andrzej Zaborowski <balrog@zabor.org> | |
6 | * | |
7 | * This code is licensed under the GPL. | |
8 | */ | |
9 | ||
83c9f4ca PB |
10 | #include "hw/hw.h" |
11 | #include "hw/sysbus.h" | |
0d09e41a | 12 | #include "hw/arm/pxa.h" |
c1713132 AZ |
13 | |
14 | #define PXA2XX_GPIO_BANKS 4 | |
15 | ||
922bb317 AF |
16 | #define TYPE_PXA2XX_GPIO "pxa2xx-gpio" |
17 | #define PXA2XX_GPIO(obj) \ | |
18 | OBJECT_CHECK(PXA2xxGPIOInfo, (obj), TYPE_PXA2XX_GPIO) | |
19 | ||
0bb53337 | 20 | typedef struct PXA2xxGPIOInfo PXA2xxGPIOInfo; |
bc24a225 | 21 | struct PXA2xxGPIOInfo { |
922bb317 AF |
22 | /*< private >*/ |
23 | SysBusDevice parent_obj; | |
24 | /*< public >*/ | |
25 | ||
55a8b801 | 26 | MemoryRegion iomem; |
0bb53337 | 27 | qemu_irq irq0, irq1, irqX; |
c1713132 | 28 | int lines; |
0bb53337 | 29 | int ncpu; |
95d42bb5 | 30 | ARMCPU *cpu; |
c1713132 AZ |
31 | |
32 | /* XXX: GNU C vectors are more suitable */ | |
33 | uint32_t ilevel[PXA2XX_GPIO_BANKS]; | |
34 | uint32_t olevel[PXA2XX_GPIO_BANKS]; | |
35 | uint32_t dir[PXA2XX_GPIO_BANKS]; | |
36 | uint32_t rising[PXA2XX_GPIO_BANKS]; | |
37 | uint32_t falling[PXA2XX_GPIO_BANKS]; | |
38 | uint32_t status[PXA2XX_GPIO_BANKS]; | |
2b76bdc9 | 39 | uint32_t gpsr[PXA2XX_GPIO_BANKS]; |
c1713132 AZ |
40 | uint32_t gafr[PXA2XX_GPIO_BANKS * 2]; |
41 | ||
42 | uint32_t prev_level[PXA2XX_GPIO_BANKS]; | |
38641a52 AZ |
43 | qemu_irq handler[PXA2XX_GPIO_BANKS * 32]; |
44 | qemu_irq read_notify; | |
c1713132 AZ |
45 | }; |
46 | ||
47 | static struct { | |
48 | enum { | |
49 | GPIO_NONE, | |
50 | GPLR, | |
51 | GPSR, | |
52 | GPCR, | |
53 | GPDR, | |
54 | GRER, | |
55 | GFER, | |
56 | GEDR, | |
57 | GAFR_L, | |
58 | GAFR_U, | |
59 | } reg; | |
60 | int bank; | |
61 | } pxa2xx_gpio_regs[0x200] = { | |
62 | [0 ... 0x1ff] = { GPIO_NONE, 0 }, | |
63 | #define PXA2XX_REG(reg, a0, a1, a2, a3) \ | |
5fafdf24 | 64 | [a0] = { reg, 0 }, [a1] = { reg, 1 }, [a2] = { reg, 2 }, [a3] = { reg, 3 }, |
c1713132 AZ |
65 | |
66 | PXA2XX_REG(GPLR, 0x000, 0x004, 0x008, 0x100) | |
67 | PXA2XX_REG(GPSR, 0x018, 0x01c, 0x020, 0x118) | |
68 | PXA2XX_REG(GPCR, 0x024, 0x028, 0x02c, 0x124) | |
69 | PXA2XX_REG(GPDR, 0x00c, 0x010, 0x014, 0x10c) | |
70 | PXA2XX_REG(GRER, 0x030, 0x034, 0x038, 0x130) | |
71 | PXA2XX_REG(GFER, 0x03c, 0x040, 0x044, 0x13c) | |
72 | PXA2XX_REG(GEDR, 0x048, 0x04c, 0x050, 0x148) | |
73 | PXA2XX_REG(GAFR_L, 0x054, 0x05c, 0x064, 0x06c) | |
74 | PXA2XX_REG(GAFR_U, 0x058, 0x060, 0x068, 0x070) | |
75 | }; | |
76 | ||
bc24a225 | 77 | static void pxa2xx_gpio_irq_update(PXA2xxGPIOInfo *s) |
c1713132 AZ |
78 | { |
79 | if (s->status[0] & (1 << 0)) | |
0bb53337 | 80 | qemu_irq_raise(s->irq0); |
c1713132 | 81 | else |
0bb53337 | 82 | qemu_irq_lower(s->irq0); |
c1713132 AZ |
83 | |
84 | if (s->status[0] & (1 << 1)) | |
0bb53337 | 85 | qemu_irq_raise(s->irq1); |
c1713132 | 86 | else |
0bb53337 | 87 | qemu_irq_lower(s->irq1); |
c1713132 AZ |
88 | |
89 | if ((s->status[0] & ~3) | s->status[1] | s->status[2] | s->status[3]) | |
0bb53337 | 90 | qemu_irq_raise(s->irqX); |
c1713132 | 91 | else |
0bb53337 | 92 | qemu_irq_lower(s->irqX); |
c1713132 AZ |
93 | } |
94 | ||
95 | /* Bitmap of pins used as standby and sleep wake-up sources. */ | |
38641a52 | 96 | static const int pxa2xx_gpio_wake[PXA2XX_GPIO_BANKS] = { |
c1713132 AZ |
97 | 0x8003fe1b, 0x002001fc, 0xec080000, 0x0012007f, |
98 | }; | |
99 | ||
38641a52 | 100 | static void pxa2xx_gpio_set(void *opaque, int line, int level) |
c1713132 | 101 | { |
bc24a225 | 102 | PXA2xxGPIOInfo *s = (PXA2xxGPIOInfo *) opaque; |
259186a7 | 103 | CPUState *cpu = CPU(s->cpu); |
c1713132 AZ |
104 | int bank; |
105 | uint32_t mask; | |
106 | ||
107 | if (line >= s->lines) { | |
108 | printf("%s: No GPIO pin %i\n", __FUNCTION__, line); | |
109 | return; | |
110 | } | |
111 | ||
112 | bank = line >> 5; | |
113 | mask = 1 << (line & 31); | |
114 | ||
115 | if (level) { | |
116 | s->status[bank] |= s->rising[bank] & mask & | |
117 | ~s->ilevel[bank] & ~s->dir[bank]; | |
118 | s->ilevel[bank] |= mask; | |
119 | } else { | |
120 | s->status[bank] |= s->falling[bank] & mask & | |
121 | s->ilevel[bank] & ~s->dir[bank]; | |
122 | s->ilevel[bank] &= ~mask; | |
123 | } | |
124 | ||
125 | if (s->status[bank] & mask) | |
126 | pxa2xx_gpio_irq_update(s); | |
127 | ||
128 | /* Wake-up GPIOs */ | |
259186a7 | 129 | if (cpu->halted && (mask & ~s->dir[bank] & pxa2xx_gpio_wake[bank])) { |
c3affe56 | 130 | cpu_interrupt(cpu, CPU_INTERRUPT_EXITTB); |
95d42bb5 | 131 | } |
c1713132 AZ |
132 | } |
133 | ||
bc24a225 | 134 | static void pxa2xx_gpio_handler_update(PXA2xxGPIOInfo *s) { |
c1713132 AZ |
135 | uint32_t level, diff; |
136 | int i, bit, line; | |
137 | for (i = 0; i < PXA2XX_GPIO_BANKS; i ++) { | |
138 | level = s->olevel[i] & s->dir[i]; | |
139 | ||
140 | for (diff = s->prev_level[i] ^ level; diff; diff ^= 1 << bit) { | |
141 | bit = ffs(diff) - 1; | |
142 | line = bit + 32 * i; | |
38641a52 | 143 | qemu_set_irq(s->handler[line], (level >> bit) & 1); |
c1713132 AZ |
144 | } |
145 | ||
146 | s->prev_level[i] = level; | |
147 | } | |
148 | } | |
149 | ||
a8170e5e | 150 | static uint64_t pxa2xx_gpio_read(void *opaque, hwaddr offset, |
55a8b801 | 151 | unsigned size) |
c1713132 | 152 | { |
bc24a225 | 153 | PXA2xxGPIOInfo *s = (PXA2xxGPIOInfo *) opaque; |
c1713132 AZ |
154 | uint32_t ret; |
155 | int bank; | |
c1713132 AZ |
156 | if (offset >= 0x200) |
157 | return 0; | |
158 | ||
159 | bank = pxa2xx_gpio_regs[offset].bank; | |
160 | switch (pxa2xx_gpio_regs[offset].reg) { | |
161 | case GPDR: /* GPIO Pin-Direction registers */ | |
162 | return s->dir[bank]; | |
163 | ||
2b76bdc9 AZ |
164 | case GPSR: /* GPIO Pin-Output Set registers */ |
165 | printf("%s: Read from a write-only register " REG_FMT "\n", | |
166 | __FUNCTION__, offset); | |
167 | return s->gpsr[bank]; /* Return last written value. */ | |
168 | ||
e1dad5a6 AZ |
169 | case GPCR: /* GPIO Pin-Output Clear registers */ |
170 | printf("%s: Read from a write-only register " REG_FMT "\n", | |
171 | __FUNCTION__, offset); | |
172 | return 31337; /* Specified as unpredictable in the docs. */ | |
173 | ||
c1713132 AZ |
174 | case GRER: /* GPIO Rising-Edge Detect Enable registers */ |
175 | return s->rising[bank]; | |
176 | ||
177 | case GFER: /* GPIO Falling-Edge Detect Enable registers */ | |
178 | return s->falling[bank]; | |
179 | ||
180 | case GAFR_L: /* GPIO Alternate Function registers */ | |
181 | return s->gafr[bank * 2]; | |
182 | ||
183 | case GAFR_U: /* GPIO Alternate Function registers */ | |
184 | return s->gafr[bank * 2 + 1]; | |
185 | ||
186 | case GPLR: /* GPIO Pin-Level registers */ | |
187 | ret = (s->olevel[bank] & s->dir[bank]) | | |
188 | (s->ilevel[bank] & ~s->dir[bank]); | |
38641a52 | 189 | qemu_irq_raise(s->read_notify); |
c1713132 AZ |
190 | return ret; |
191 | ||
192 | case GEDR: /* GPIO Edge Detect Status registers */ | |
193 | return s->status[bank]; | |
194 | ||
195 | default: | |
2ac71179 | 196 | hw_error("%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset); |
c1713132 AZ |
197 | } |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
a8170e5e | 202 | static void pxa2xx_gpio_write(void *opaque, hwaddr offset, |
55a8b801 | 203 | uint64_t value, unsigned size) |
c1713132 | 204 | { |
bc24a225 | 205 | PXA2xxGPIOInfo *s = (PXA2xxGPIOInfo *) opaque; |
c1713132 | 206 | int bank; |
c1713132 AZ |
207 | if (offset >= 0x200) |
208 | return; | |
209 | ||
210 | bank = pxa2xx_gpio_regs[offset].bank; | |
211 | switch (pxa2xx_gpio_regs[offset].reg) { | |
212 | case GPDR: /* GPIO Pin-Direction registers */ | |
213 | s->dir[bank] = value; | |
214 | pxa2xx_gpio_handler_update(s); | |
215 | break; | |
216 | ||
217 | case GPSR: /* GPIO Pin-Output Set registers */ | |
218 | s->olevel[bank] |= value; | |
219 | pxa2xx_gpio_handler_update(s); | |
2b76bdc9 | 220 | s->gpsr[bank] = value; |
c1713132 AZ |
221 | break; |
222 | ||
223 | case GPCR: /* GPIO Pin-Output Clear registers */ | |
224 | s->olevel[bank] &= ~value; | |
225 | pxa2xx_gpio_handler_update(s); | |
226 | break; | |
227 | ||
228 | case GRER: /* GPIO Rising-Edge Detect Enable registers */ | |
229 | s->rising[bank] = value; | |
230 | break; | |
231 | ||
232 | case GFER: /* GPIO Falling-Edge Detect Enable registers */ | |
233 | s->falling[bank] = value; | |
234 | break; | |
235 | ||
236 | case GAFR_L: /* GPIO Alternate Function registers */ | |
237 | s->gafr[bank * 2] = value; | |
238 | break; | |
239 | ||
240 | case GAFR_U: /* GPIO Alternate Function registers */ | |
241 | s->gafr[bank * 2 + 1] = value; | |
242 | break; | |
243 | ||
244 | case GEDR: /* GPIO Edge Detect Status registers */ | |
245 | s->status[bank] &= ~value; | |
246 | pxa2xx_gpio_irq_update(s); | |
247 | break; | |
248 | ||
249 | default: | |
2ac71179 | 250 | hw_error("%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset); |
c1713132 AZ |
251 | } |
252 | } | |
253 | ||
55a8b801 BC |
254 | static const MemoryRegionOps pxa_gpio_ops = { |
255 | .read = pxa2xx_gpio_read, | |
256 | .write = pxa2xx_gpio_write, | |
257 | .endianness = DEVICE_NATIVE_ENDIAN, | |
c1713132 AZ |
258 | }; |
259 | ||
a8170e5e | 260 | DeviceState *pxa2xx_gpio_init(hwaddr base, |
55e5c285 | 261 | ARMCPU *cpu, DeviceState *pic, int lines) |
aa941b94 | 262 | { |
55e5c285 | 263 | CPUState *cs = CPU(cpu); |
0bb53337 | 264 | DeviceState *dev; |
aa941b94 | 265 | |
922bb317 | 266 | dev = qdev_create(NULL, TYPE_PXA2XX_GPIO); |
0bb53337 | 267 | qdev_prop_set_int32(dev, "lines", lines); |
55e5c285 | 268 | qdev_prop_set_int32(dev, "ncpu", cs->cpu_index); |
0bb53337 | 269 | qdev_init_nofail(dev); |
aa941b94 | 270 | |
1356b98d AF |
271 | sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base); |
272 | sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, | |
e1f8c729 | 273 | qdev_get_gpio_in(pic, PXA2XX_PIC_GPIO_0)); |
1356b98d | 274 | sysbus_connect_irq(SYS_BUS_DEVICE(dev), 1, |
e1f8c729 | 275 | qdev_get_gpio_in(pic, PXA2XX_PIC_GPIO_1)); |
1356b98d | 276 | sysbus_connect_irq(SYS_BUS_DEVICE(dev), 2, |
e1f8c729 | 277 | qdev_get_gpio_in(pic, PXA2XX_PIC_GPIO_X)); |
aa941b94 | 278 | |
0bb53337 | 279 | return dev; |
aa941b94 AZ |
280 | } |
281 | ||
922bb317 | 282 | static int pxa2xx_gpio_initfn(SysBusDevice *sbd) |
c1713132 | 283 | { |
922bb317 AF |
284 | DeviceState *dev = DEVICE(sbd); |
285 | PXA2xxGPIOInfo *s = PXA2XX_GPIO(dev); | |
c1713132 | 286 | |
38d8f5c8 | 287 | s->cpu = ARM_CPU(qemu_get_cpu(s->ncpu)); |
c1713132 | 288 | |
922bb317 AF |
289 | qdev_init_gpio_in(dev, pxa2xx_gpio_set, s->lines); |
290 | qdev_init_gpio_out(dev, s->handler, s->lines); | |
c1713132 | 291 | |
64bde0f3 | 292 | memory_region_init_io(&s->iomem, OBJECT(s), &pxa_gpio_ops, s, "pxa2xx-gpio", 0x1000); |
922bb317 AF |
293 | sysbus_init_mmio(sbd, &s->iomem); |
294 | sysbus_init_irq(sbd, &s->irq0); | |
295 | sysbus_init_irq(sbd, &s->irq1); | |
296 | sysbus_init_irq(sbd, &s->irqX); | |
c1713132 | 297 | |
0bb53337 | 298 | return 0; |
c1713132 AZ |
299 | } |
300 | ||
301 | /* | |
302 | * Registers a callback to notify on GPLR reads. This normally | |
303 | * shouldn't be needed but it is used for the hack on Spitz machines. | |
304 | */ | |
0bb53337 | 305 | void pxa2xx_gpio_read_notifier(DeviceState *dev, qemu_irq handler) |
38641a52 | 306 | { |
922bb317 AF |
307 | PXA2xxGPIOInfo *s = PXA2XX_GPIO(dev); |
308 | ||
c1713132 | 309 | s->read_notify = handler; |
c1713132 | 310 | } |
0bb53337 DES |
311 | |
312 | static const VMStateDescription vmstate_pxa2xx_gpio_regs = { | |
313 | .name = "pxa2xx-gpio", | |
314 | .version_id = 1, | |
315 | .minimum_version_id = 1, | |
316 | .minimum_version_id_old = 1, | |
317 | .fields = (VMStateField []) { | |
318 | VMSTATE_INT32(lines, PXA2xxGPIOInfo), | |
319 | VMSTATE_UINT32_ARRAY(ilevel, PXA2xxGPIOInfo, PXA2XX_GPIO_BANKS), | |
320 | VMSTATE_UINT32_ARRAY(olevel, PXA2xxGPIOInfo, PXA2XX_GPIO_BANKS), | |
321 | VMSTATE_UINT32_ARRAY(dir, PXA2xxGPIOInfo, PXA2XX_GPIO_BANKS), | |
322 | VMSTATE_UINT32_ARRAY(rising, PXA2xxGPIOInfo, PXA2XX_GPIO_BANKS), | |
323 | VMSTATE_UINT32_ARRAY(falling, PXA2xxGPIOInfo, PXA2XX_GPIO_BANKS), | |
324 | VMSTATE_UINT32_ARRAY(status, PXA2xxGPIOInfo, PXA2XX_GPIO_BANKS), | |
325 | VMSTATE_UINT32_ARRAY(gafr, PXA2xxGPIOInfo, PXA2XX_GPIO_BANKS * 2), | |
326 | VMSTATE_END_OF_LIST(), | |
327 | }, | |
328 | }; | |
329 | ||
999e12bb AL |
330 | static Property pxa2xx_gpio_properties[] = { |
331 | DEFINE_PROP_INT32("lines", PXA2xxGPIOInfo, lines, 0), | |
332 | DEFINE_PROP_INT32("ncpu", PXA2xxGPIOInfo, ncpu, 0), | |
333 | DEFINE_PROP_END_OF_LIST(), | |
334 | }; | |
335 | ||
336 | static void pxa2xx_gpio_class_init(ObjectClass *klass, void *data) | |
337 | { | |
39bffca2 | 338 | DeviceClass *dc = DEVICE_CLASS(klass); |
999e12bb AL |
339 | SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
340 | ||
341 | k->init = pxa2xx_gpio_initfn; | |
39bffca2 AL |
342 | dc->desc = "PXA2xx GPIO controller"; |
343 | dc->props = pxa2xx_gpio_properties; | |
999e12bb AL |
344 | } |
345 | ||
8c43a6f0 | 346 | static const TypeInfo pxa2xx_gpio_info = { |
922bb317 | 347 | .name = TYPE_PXA2XX_GPIO, |
39bffca2 AL |
348 | .parent = TYPE_SYS_BUS_DEVICE, |
349 | .instance_size = sizeof(PXA2xxGPIOInfo), | |
350 | .class_init = pxa2xx_gpio_class_init, | |
0bb53337 DES |
351 | }; |
352 | ||
83f7d43a | 353 | static void pxa2xx_gpio_register_types(void) |
0bb53337 | 354 | { |
39bffca2 | 355 | type_register_static(&pxa2xx_gpio_info); |
0bb53337 | 356 | } |
83f7d43a AF |
357 | |
358 | type_init(pxa2xx_gpio_register_types) |