hw/intc/exynos4210_gic.c

   1 /*
   2  * Samsung exynos4210 GIC implementation. Based on hw/arm_gic.c
   3  *
   4  * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd.
   5  * All rights reserved.
   6  *
   7  * Evgeny Voevodin <e.voevodin@samsung.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the
  11  * Free Software Foundation; either version 2 of the License, or (at your
  12  * option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  17  * See the GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 #include "qemu/osdep.h"
  24 #include "hw/sysbus.h"
  25 #include "migration/vmstate.h"
  26 #include "qemu/module.h"
  27 #include "hw/irq.h"
  28 #include "hw/arm/exynos4210.h"
  29
  30 enum ExtGicId {
  31     EXT_GIC_ID_MDMA_LCD0 = 66,
  32     EXT_GIC_ID_PDMA0,
  33     EXT_GIC_ID_PDMA1,
  34     EXT_GIC_ID_TIMER0,
  35     EXT_GIC_ID_TIMER1,
  36     EXT_GIC_ID_TIMER2,
  37     EXT_GIC_ID_TIMER3,
  38     EXT_GIC_ID_TIMER4,
  39     EXT_GIC_ID_MCT_L0,
  40     EXT_GIC_ID_WDT,
  41     EXT_GIC_ID_RTC_ALARM,
  42     EXT_GIC_ID_RTC_TIC,
  43     EXT_GIC_ID_GPIO_XB,
  44     EXT_GIC_ID_GPIO_XA,
  45     EXT_GIC_ID_MCT_L1,
  46     EXT_GIC_ID_IEM_APC,
  47     EXT_GIC_ID_IEM_IEC,
  48     EXT_GIC_ID_NFC,
  49     EXT_GIC_ID_UART0,
  50     EXT_GIC_ID_UART1,
  51     EXT_GIC_ID_UART2,
  52     EXT_GIC_ID_UART3,
  53     EXT_GIC_ID_UART4,
  54     EXT_GIC_ID_MCT_G0,
  55     EXT_GIC_ID_I2C0,
  56     EXT_GIC_ID_I2C1,
  57     EXT_GIC_ID_I2C2,
  58     EXT_GIC_ID_I2C3,
  59     EXT_GIC_ID_I2C4,
  60     EXT_GIC_ID_I2C5,
  61     EXT_GIC_ID_I2C6,
  62     EXT_GIC_ID_I2C7,
  63     EXT_GIC_ID_SPI0,
  64     EXT_GIC_ID_SPI1,
  65     EXT_GIC_ID_SPI2,
  66     EXT_GIC_ID_MCT_G1,
  67     EXT_GIC_ID_USB_HOST,
  68     EXT_GIC_ID_USB_DEVICE,
  69     EXT_GIC_ID_MODEMIF,
  70     EXT_GIC_ID_HSMMC0,
  71     EXT_GIC_ID_HSMMC1,
  72     EXT_GIC_ID_HSMMC2,
  73     EXT_GIC_ID_HSMMC3,
  74     EXT_GIC_ID_SDMMC,
  75     EXT_GIC_ID_MIPI_CSI_4LANE,
  76     EXT_GIC_ID_MIPI_DSI_4LANE,
  77     EXT_GIC_ID_MIPI_CSI_2LANE,
  78     EXT_GIC_ID_MIPI_DSI_2LANE,
  79     EXT_GIC_ID_ONENAND_AUDI,
  80     EXT_GIC_ID_ROTATOR,
  81     EXT_GIC_ID_FIMC0,
  82     EXT_GIC_ID_FIMC1,
  83     EXT_GIC_ID_FIMC2,
  84     EXT_GIC_ID_FIMC3,
  85     EXT_GIC_ID_JPEG,
  86     EXT_GIC_ID_2D,
  87     EXT_GIC_ID_PCIe,
  88     EXT_GIC_ID_MIXER,
  89     EXT_GIC_ID_HDMI,
  90     EXT_GIC_ID_HDMI_I2C,
  91     EXT_GIC_ID_MFC,
  92     EXT_GIC_ID_TVENC,
  93 };
  94
  95 enum ExtInt {
  96     EXT_GIC_ID_EXTINT0 = 48,
  97     EXT_GIC_ID_EXTINT1,
  98     EXT_GIC_ID_EXTINT2,
  99     EXT_GIC_ID_EXTINT3,
 100     EXT_GIC_ID_EXTINT4,
 101     EXT_GIC_ID_EXTINT5,
 102     EXT_GIC_ID_EXTINT6,
 103     EXT_GIC_ID_EXTINT7,
 104     EXT_GIC_ID_EXTINT8,
 105     EXT_GIC_ID_EXTINT9,
 106     EXT_GIC_ID_EXTINT10,
 107     EXT_GIC_ID_EXTINT11,
 108     EXT_GIC_ID_EXTINT12,
 109     EXT_GIC_ID_EXTINT13,
 110     EXT_GIC_ID_EXTINT14,
 111     EXT_GIC_ID_EXTINT15
 112 };
 113
 114 /*
 115  * External GIC sources which are not from External Interrupt Combiner or
 116  * External Interrupts are starting from EXYNOS4210_MAX_EXT_COMBINER_OUT_IRQ,
 117  * which is INTG16 in Internal Interrupt Combiner.
 118  */
 119
 120 static const uint32_t
 121 combiner_grp_to_gic_id[64-EXYNOS4210_MAX_EXT_COMBINER_OUT_IRQ][8] = {
 122     /* int combiner groups 16-19 */
 123     { }, { }, { }, { },
 124     /* int combiner group 20 */
 125     { 0, EXT_GIC_ID_MDMA_LCD0 },
 126     /* int combiner group 21 */
 127     { EXT_GIC_ID_PDMA0, EXT_GIC_ID_PDMA1 },
 128     /* int combiner group 22 */
 129     { EXT_GIC_ID_TIMER0, EXT_GIC_ID_TIMER1, EXT_GIC_ID_TIMER2,
 130             EXT_GIC_ID_TIMER3, EXT_GIC_ID_TIMER4 },
 131     /* int combiner group 23 */
 132     { EXT_GIC_ID_RTC_ALARM, EXT_GIC_ID_RTC_TIC },
 133     /* int combiner group 24 */
 134     { EXT_GIC_ID_GPIO_XB, EXT_GIC_ID_GPIO_XA },
 135     /* int combiner group 25 */
 136     { EXT_GIC_ID_IEM_APC, EXT_GIC_ID_IEM_IEC },
 137     /* int combiner group 26 */
 138     { EXT_GIC_ID_UART0, EXT_GIC_ID_UART1, EXT_GIC_ID_UART2, EXT_GIC_ID_UART3,
 139             EXT_GIC_ID_UART4 },
 140     /* int combiner group 27 */
 141     { EXT_GIC_ID_I2C0, EXT_GIC_ID_I2C1, EXT_GIC_ID_I2C2, EXT_GIC_ID_I2C3,
 142             EXT_GIC_ID_I2C4, EXT_GIC_ID_I2C5, EXT_GIC_ID_I2C6,
 143             EXT_GIC_ID_I2C7 },
 144     /* int combiner group 28 */
 145     { EXT_GIC_ID_SPI0, EXT_GIC_ID_SPI1, EXT_GIC_ID_SPI2 , EXT_GIC_ID_USB_HOST},
 146     /* int combiner group 29 */
 147     { EXT_GIC_ID_HSMMC0, EXT_GIC_ID_HSMMC1, EXT_GIC_ID_HSMMC2,
 148      EXT_GIC_ID_HSMMC3, EXT_GIC_ID_SDMMC },
 149     /* int combiner group 30 */
 150     { EXT_GIC_ID_MIPI_CSI_4LANE, EXT_GIC_ID_MIPI_CSI_2LANE },
 151     /* int combiner group 31 */
 152     { EXT_GIC_ID_MIPI_DSI_4LANE, EXT_GIC_ID_MIPI_DSI_2LANE },
 153     /* int combiner group 32 */
 154     { EXT_GIC_ID_FIMC0, EXT_GIC_ID_FIMC1 },
 155     /* int combiner group 33 */
 156     { EXT_GIC_ID_FIMC2, EXT_GIC_ID_FIMC3 },
 157     /* int combiner group 34 */
 158     { EXT_GIC_ID_ONENAND_AUDI, EXT_GIC_ID_NFC },
 159     /* int combiner group 35 */
 160     { 0, 0, 0, EXT_GIC_ID_MCT_L1, EXT_GIC_ID_MCT_G0, EXT_GIC_ID_MCT_G1 },
 161     /* int combiner group 36 */
 162     { EXT_GIC_ID_MIXER },
 163     /* int combiner group 37 */
 164     { EXT_GIC_ID_EXTINT4, EXT_GIC_ID_EXTINT5, EXT_GIC_ID_EXTINT6,
 165      EXT_GIC_ID_EXTINT7 },
 166     /* groups 38-50 */
 167     { }, { }, { }, { }, { }, { }, { }, { }, { }, { }, { }, { }, { },
 168     /* int combiner group 51 */
 169     { EXT_GIC_ID_MCT_L0, 0, 0, 0, EXT_GIC_ID_MCT_G0, EXT_GIC_ID_MCT_G1 },
 170     /* group 52 */
 171     { },
 172     /* int combiner group 53 */
 173     { EXT_GIC_ID_WDT, 0, 0, 0, EXT_GIC_ID_MCT_G0, EXT_GIC_ID_MCT_G1 },
 174     /* groups 54-63 */
 175     { }, { }, { }, { }, { }, { }, { }, { }, { }, { }
 176 };
 177
 178 #define EXYNOS4210_GIC_NIRQ 160
 179
 180 #define EXYNOS4210_EXT_GIC_CPU_REGION_SIZE     0x10000
 181 #define EXYNOS4210_EXT_GIC_DIST_REGION_SIZE    0x10000
 182
 183 #define EXYNOS4210_EXT_GIC_PER_CPU_OFFSET      0x8000
 184 #define EXYNOS4210_EXT_GIC_CPU_GET_OFFSET(n) \
 185     ((n) * EXYNOS4210_EXT_GIC_PER_CPU_OFFSET)
 186 #define EXYNOS4210_EXT_GIC_DIST_GET_OFFSET(n) \
 187     ((n) * EXYNOS4210_EXT_GIC_PER_CPU_OFFSET)
 188
 189 #define EXYNOS4210_GIC_CPU_REGION_SIZE  0x100
 190 #define EXYNOS4210_GIC_DIST_REGION_SIZE 0x1000
 191
 192 static void exynos4210_irq_handler(void *opaque, int irq, int level)
 193 {
 194     Exynos4210Irq *s = (Exynos4210Irq *)opaque;
 195
 196     /* Bypass */
 197     qemu_set_irq(s->board_irqs[irq], level);
 198 }
 199
 200 /*
 201  * Initialize exynos4210 IRQ subsystem stub.
 202  */
 203 qemu_irq *exynos4210_init_irq(Exynos4210Irq *s)
 204 {
 205     return qemu_allocate_irqs(exynos4210_irq_handler, s,
 206             EXYNOS4210_MAX_INT_COMBINER_IN_IRQ);
 207 }
 208
 209 /*
 210  * Initialize board IRQs.
 211  * These IRQs contain splitted Int/External Combiner and External Gic IRQs.
 212  */
 213 void exynos4210_init_board_irqs(Exynos4210Irq *s)
 214 {
 215     uint32_t grp, bit, irq_id, n;
 216
 217     for (n = 0; n < EXYNOS4210_MAX_EXT_COMBINER_IN_IRQ; n++) {
 218         irq_id = 0;
 219         if (n == EXYNOS4210_COMBINER_GET_IRQ_NUM(1, 4) ||
 220                 n == EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 4)) {
 221             /* MCT_G0 is passed to External GIC */
 222             irq_id = EXT_GIC_ID_MCT_G0;
 223         }
 224         if (n == EXYNOS4210_COMBINER_GET_IRQ_NUM(1, 5) ||
 225                 n == EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 5)) {
 226             /* MCT_G1 is passed to External and GIC */
 227             irq_id = EXT_GIC_ID_MCT_G1;
 228         }
 229         if (irq_id) {
 230             s->board_irqs[n] = qemu_irq_split(s->int_combiner_irq[n],
 231                     s->ext_gic_irq[irq_id-32]);
 232         } else {
 233             s->board_irqs[n] = qemu_irq_split(s->int_combiner_irq[n],
 234                     s->ext_combiner_irq[n]);
 235         }
 236     }
 237     for (; n < EXYNOS4210_MAX_INT_COMBINER_IN_IRQ; n++) {
 238         /* these IDs are passed to Internal Combiner and External GIC */
 239         grp = EXYNOS4210_COMBINER_GET_GRP_NUM(n);
 240         bit = EXYNOS4210_COMBINER_GET_BIT_NUM(n);
 241         irq_id = combiner_grp_to_gic_id[grp -
 242                      EXYNOS4210_MAX_EXT_COMBINER_OUT_IRQ][bit];
 243
 244         if (irq_id) {
 245             s->board_irqs[n] = qemu_irq_split(s->int_combiner_irq[n],
 246                     s->ext_gic_irq[irq_id-32]);
 247         }
 248     }
 249 }
 250
 251 /*
 252  * Get IRQ number from exynos4210 IRQ subsystem stub.
 253  * To identify IRQ source use internal combiner group and bit number
 254  *  grp - group number
 255  *  bit - bit number inside group
 256  */
 257 uint32_t exynos4210_get_irq(uint32_t grp, uint32_t bit)
 258 {
 259     return EXYNOS4210_COMBINER_GET_IRQ_NUM(grp, bit);
 260 }
 261
 262 /********* GIC part *********/
 263
 264 #define TYPE_EXYNOS4210_GIC "exynos4210.gic"
 265 #define EXYNOS4210_GIC(obj) \
 266     OBJECT_CHECK(Exynos4210GicState, (obj), TYPE_EXYNOS4210_GIC)
 267
 268 typedef struct {
 269     SysBusDevice parent_obj;
 270
 271     MemoryRegion cpu_container;
 272     MemoryRegion dist_container;
 273     MemoryRegion cpu_alias[EXYNOS4210_NCPUS];
 274     MemoryRegion dist_alias[EXYNOS4210_NCPUS];
 275     uint32_t num_cpu;
 276     DeviceState *gic;
 277 } Exynos4210GicState;
 278
 279 static void exynos4210_gic_set_irq(void *opaque, int irq, int level)
 280 {
 281     Exynos4210GicState *s = (Exynos4210GicState *)opaque;
 282     qemu_set_irq(qdev_get_gpio_in(s->gic, irq), level);
 283 }
 284
 285 static void exynos4210_gic_realize(DeviceState *dev, Error **errp)
 286 {
 287     Object *obj = OBJECT(dev);
 288     Exynos4210GicState *s = EXYNOS4210_GIC(obj);
 289     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 290     const char cpu_prefix[] = "exynos4210-gic-alias_cpu";
 291     const char dist_prefix[] = "exynos4210-gic-alias_dist";
 292     char cpu_alias_name[sizeof(cpu_prefix) + 3];
 293     char dist_alias_name[sizeof(cpu_prefix) + 3];
 294     SysBusDevice *gicbusdev;
 295     uint32_t i;
 296
 297     s->gic = qdev_create(NULL, "arm_gic");
 298     qdev_prop_set_uint32(s->gic, "num-cpu", s->num_cpu);
 299     qdev_prop_set_uint32(s->gic, "num-irq", EXYNOS4210_GIC_NIRQ);
 300     qdev_init_nofail(s->gic);
 301     gicbusdev = SYS_BUS_DEVICE(s->gic);
 302
 303     /* Pass through outbound IRQ lines from the GIC */
 304     sysbus_pass_irq(sbd, gicbusdev);
 305
 306     /* Pass through inbound GPIO lines to the GIC */
 307     qdev_init_gpio_in(dev, exynos4210_gic_set_irq,
 308                       EXYNOS4210_GIC_NIRQ - 32);
 309
 310     memory_region_init(&s->cpu_container, obj, "exynos4210-cpu-container",
 311             EXYNOS4210_EXT_GIC_CPU_REGION_SIZE);
 312     memory_region_init(&s->dist_container, obj, "exynos4210-dist-container",
 313             EXYNOS4210_EXT_GIC_DIST_REGION_SIZE);
 314
 315     for (i = 0; i < s->num_cpu; i++) {
 316         /* Map CPU interface per SMP Core */
 317         sprintf(cpu_alias_name, "%s%x", cpu_prefix, i);
 318         memory_region_init_alias(&s->cpu_alias[i], obj,
 319                                  cpu_alias_name,
 320                                  sysbus_mmio_get_region(gicbusdev, 1),
 321                                  0,
 322                                  EXYNOS4210_GIC_CPU_REGION_SIZE);
 323         memory_region_add_subregion(&s->cpu_container,
 324                 EXYNOS4210_EXT_GIC_CPU_GET_OFFSET(i), &s->cpu_alias[i]);
 325
 326         /* Map Distributor per SMP Core */
 327         sprintf(dist_alias_name, "%s%x", dist_prefix, i);
 328         memory_region_init_alias(&s->dist_alias[i], obj,
 329                                  dist_alias_name,
 330                                  sysbus_mmio_get_region(gicbusdev, 0),
 331                                  0,
 332                                  EXYNOS4210_GIC_DIST_REGION_SIZE);
 333         memory_region_add_subregion(&s->dist_container,
 334                 EXYNOS4210_EXT_GIC_DIST_GET_OFFSET(i), &s->dist_alias[i]);
 335     }
 336
 337     sysbus_init_mmio(sbd, &s->cpu_container);
 338     sysbus_init_mmio(sbd, &s->dist_container);
 339 }
 340
 341 static Property exynos4210_gic_properties[] = {
 342     DEFINE_PROP_UINT32("num-cpu", Exynos4210GicState, num_cpu, 1),
 343     DEFINE_PROP_END_OF_LIST(),
 344 };
 345
 346 static void exynos4210_gic_class_init(ObjectClass *klass, void *data)
 347 {
 348     DeviceClass *dc = DEVICE_CLASS(klass);
 349
 350     dc->props = exynos4210_gic_properties;
 351     dc->realize = exynos4210_gic_realize;
 352 }
 353
 354 static const TypeInfo exynos4210_gic_info = {
 355     .name          = TYPE_EXYNOS4210_GIC,
 356     .parent        = TYPE_SYS_BUS_DEVICE,
 357     .instance_size = sizeof(Exynos4210GicState),
 358     .class_init    = exynos4210_gic_class_init,
 359 };
 360
 361 static void exynos4210_gic_register_types(void)
 362 {
 363     type_register_static(&exynos4210_gic_info);
 364 }
 365
 366 type_init(exynos4210_gic_register_types)
 367
 368 /* IRQ OR Gate struct.
 369  *
 370  * This device models an OR gate. There are n_in input qdev gpio lines and one
 371  * output sysbus IRQ line. The output IRQ level is formed as OR between all
 372  * gpio inputs.
 373  */
 374
 375 #define TYPE_EXYNOS4210_IRQ_GATE "exynos4210.irq_gate"
 376 #define EXYNOS4210_IRQ_GATE(obj) \
 377     OBJECT_CHECK(Exynos4210IRQGateState, (obj), TYPE_EXYNOS4210_IRQ_GATE)
 378
 379 typedef struct Exynos4210IRQGateState {
 380     SysBusDevice parent_obj;
 381
 382     uint32_t n_in;      /* inputs amount */
 383     uint32_t *level;    /* input levels */
 384     qemu_irq out;       /* output IRQ */
 385 } Exynos4210IRQGateState;
 386
 387 static Property exynos4210_irq_gate_properties[] = {
 388     DEFINE_PROP_UINT32("n_in", Exynos4210IRQGateState, n_in, 1),
 389     DEFINE_PROP_END_OF_LIST(),
 390 };
 391
 392 static const VMStateDescription vmstate_exynos4210_irq_gate = {
 393     .name = "exynos4210.irq_gate",
 394     .version_id = 2,
 395     .minimum_version_id = 2,
 396     .fields = (VMStateField[]) {
 397         VMSTATE_VBUFFER_UINT32(level, Exynos4210IRQGateState, 1, NULL, n_in),
 398         VMSTATE_END_OF_LIST()
 399     }
 400 };
 401
 402 /* Process a change in IRQ input. */
 403 static void exynos4210_irq_gate_handler(void *opaque, int irq, int level)
 404 {
 405     Exynos4210IRQGateState *s = (Exynos4210IRQGateState *)opaque;
 406     uint32_t i;
 407
 408     assert(irq < s->n_in);
 409
 410     s->level[irq] = level;
 411
 412     for (i = 0; i < s->n_in; i++) {
 413         if (s->level[i] >= 1) {
 414             qemu_irq_raise(s->out);
 415             return;
 416         }
 417     }
 418
 419     qemu_irq_lower(s->out);
 420 }
 421
 422 static void exynos4210_irq_gate_reset(DeviceState *d)
 423 {
 424     Exynos4210IRQGateState *s = EXYNOS4210_IRQ_GATE(d);
 425
 426     memset(s->level, 0, s->n_in * sizeof(*s->level));
 427 }
 428
 429 /*
 430  * IRQ Gate initialization.
 431  */
 432 static void exynos4210_irq_gate_init(Object *obj)
 433 {
 434     Exynos4210IRQGateState *s = EXYNOS4210_IRQ_GATE(obj);
 435     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 436
 437     sysbus_init_irq(sbd, &s->out);
 438 }
 439
 440 static void exynos4210_irq_gate_realize(DeviceState *dev, Error **errp)
 441 {
 442     Exynos4210IRQGateState *s = EXYNOS4210_IRQ_GATE(dev);
 443
 444     /* Allocate general purpose input signals and connect a handler to each of
 445      * them */
 446     qdev_init_gpio_in(dev, exynos4210_irq_gate_handler, s->n_in);
 447
 448     s->level = g_malloc0(s->n_in * sizeof(*s->level));
 449 }
 450
 451 static void exynos4210_irq_gate_class_init(ObjectClass *klass, void *data)
 452 {
 453     DeviceClass *dc = DEVICE_CLASS(klass);
 454
 455     dc->reset = exynos4210_irq_gate_reset;
 456     dc->vmsd = &vmstate_exynos4210_irq_gate;
 457     dc->props = exynos4210_irq_gate_properties;
 458     dc->realize = exynos4210_irq_gate_realize;
 459 }
 460
 461 static const TypeInfo exynos4210_irq_gate_info = {
 462     .name          = TYPE_EXYNOS4210_IRQ_GATE,
 463     .parent        = TYPE_SYS_BUS_DEVICE,
 464     .instance_size = sizeof(Exynos4210IRQGateState),
 465     .instance_init = exynos4210_irq_gate_init,
 466     .class_init    = exynos4210_irq_gate_class_init,
 467 };
 468
 469 static void exynos4210_irq_gate_register_types(void)
 470 {
 471     type_register_static(&exynos4210_irq_gate_info);
 472 }
 473
 474 type_init(exynos4210_irq_gate_register_types)