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