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 "hw/sysbus.h"
  24 #include "qemu-common.h"
  25 #include "hw/irq.h"
  26 #include "hw/arm/exynos4210.h"
  27
  28 enum ExtGicId {
  29     EXT_GIC_ID_MDMA_LCD0 = 66,
  30     EXT_GIC_ID_PDMA0,
  31     EXT_GIC_ID_PDMA1,
  32     EXT_GIC_ID_TIMER0,
  33     EXT_GIC_ID_TIMER1,
  34     EXT_GIC_ID_TIMER2,
  35     EXT_GIC_ID_TIMER3,
  36     EXT_GIC_ID_TIMER4,
  37     EXT_GIC_ID_MCT_L0,
  38     EXT_GIC_ID_WDT,
  39     EXT_GIC_ID_RTC_ALARM,
  40     EXT_GIC_ID_RTC_TIC,
  41     EXT_GIC_ID_GPIO_XB,
  42     EXT_GIC_ID_GPIO_XA,
  43     EXT_GIC_ID_MCT_L1,
  44     EXT_GIC_ID_IEM_APC,
  45     EXT_GIC_ID_IEM_IEC,
  46     EXT_GIC_ID_NFC,
  47     EXT_GIC_ID_UART0,
  48     EXT_GIC_ID_UART1,
  49     EXT_GIC_ID_UART2,
  50     EXT_GIC_ID_UART3,
  51     EXT_GIC_ID_UART4,
  52     EXT_GIC_ID_MCT_G0,
  53     EXT_GIC_ID_I2C0,
  54     EXT_GIC_ID_I2C1,
  55     EXT_GIC_ID_I2C2,
  56     EXT_GIC_ID_I2C3,
  57     EXT_GIC_ID_I2C4,
  58     EXT_GIC_ID_I2C5,
  59     EXT_GIC_ID_I2C6,
  60     EXT_GIC_ID_I2C7,
  61     EXT_GIC_ID_SPI0,
  62     EXT_GIC_ID_SPI1,
  63     EXT_GIC_ID_SPI2,
  64     EXT_GIC_ID_MCT_G1,
  65     EXT_GIC_ID_USB_HOST,
  66     EXT_GIC_ID_USB_DEVICE,
  67     EXT_GIC_ID_MODEMIF,
  68     EXT_GIC_ID_HSMMC0,
  69     EXT_GIC_ID_HSMMC1,
  70     EXT_GIC_ID_HSMMC2,
  71     EXT_GIC_ID_HSMMC3,
  72     EXT_GIC_ID_SDMMC,
  73     EXT_GIC_ID_MIPI_CSI_4LANE,
  74     EXT_GIC_ID_MIPI_DSI_4LANE,
  75     EXT_GIC_ID_MIPI_CSI_2LANE,
  76     EXT_GIC_ID_MIPI_DSI_2LANE,
  77     EXT_GIC_ID_ONENAND_AUDI,
  78     EXT_GIC_ID_ROTATOR,
  79     EXT_GIC_ID_FIMC0,
  80     EXT_GIC_ID_FIMC1,
  81     EXT_GIC_ID_FIMC2,
  82     EXT_GIC_ID_FIMC3,
  83     EXT_GIC_ID_JPEG,
  84     EXT_GIC_ID_2D,
  85     EXT_GIC_ID_PCIe,
  86     EXT_GIC_ID_MIXER,
  87     EXT_GIC_ID_HDMI,
  88     EXT_GIC_ID_HDMI_I2C,
  89     EXT_GIC_ID_MFC,
  90     EXT_GIC_ID_TVENC,
  91 };
  92
  93 enum ExtInt {
  94     EXT_GIC_ID_EXTINT0 = 48,
  95     EXT_GIC_ID_EXTINT1,
  96     EXT_GIC_ID_EXTINT2,
  97     EXT_GIC_ID_EXTINT3,
  98     EXT_GIC_ID_EXTINT4,
  99     EXT_GIC_ID_EXTINT5,
 100     EXT_GIC_ID_EXTINT6,
 101     EXT_GIC_ID_EXTINT7,
 102     EXT_GIC_ID_EXTINT8,
 103     EXT_GIC_ID_EXTINT9,
 104     EXT_GIC_ID_EXTINT10,
 105     EXT_GIC_ID_EXTINT11,
 106     EXT_GIC_ID_EXTINT12,
 107     EXT_GIC_ID_EXTINT13,
 108     EXT_GIC_ID_EXTINT14,
 109     EXT_GIC_ID_EXTINT15
 110 };
 111
 112 /*
 113  * External GIC sources which are not from External Interrupt Combiner or
 114  * External Interrupts are starting from EXYNOS4210_MAX_EXT_COMBINER_OUT_IRQ,
 115  * which is INTG16 in Internal Interrupt Combiner.
 116  */
 117
 118 static uint32_t
 119 combiner_grp_to_gic_id[64-EXYNOS4210_MAX_EXT_COMBINER_OUT_IRQ][8] = {
 120     /* int combiner groups 16-19 */
 121     { }, { }, { }, { },
 122     /* int combiner group 20 */
 123     { 0, EXT_GIC_ID_MDMA_LCD0 },
 124     /* int combiner group 21 */
 125     { EXT_GIC_ID_PDMA0, EXT_GIC_ID_PDMA1 },
 126     /* int combiner group 22 */
 127     { EXT_GIC_ID_TIMER0, EXT_GIC_ID_TIMER1, EXT_GIC_ID_TIMER2,
 128             EXT_GIC_ID_TIMER3, EXT_GIC_ID_TIMER4 },
 129     /* int combiner group 23 */
 130     { EXT_GIC_ID_RTC_ALARM, EXT_GIC_ID_RTC_TIC },
 131     /* int combiner group 24 */
 132     { EXT_GIC_ID_GPIO_XB, EXT_GIC_ID_GPIO_XA },
 133     /* int combiner group 25 */
 134     { EXT_GIC_ID_IEM_APC, EXT_GIC_ID_IEM_IEC },
 135     /* int combiner group 26 */
 136     { EXT_GIC_ID_UART0, EXT_GIC_ID_UART1, EXT_GIC_ID_UART2, EXT_GIC_ID_UART3,
 137             EXT_GIC_ID_UART4 },
 138     /* int combiner group 27 */
 139     { EXT_GIC_ID_I2C0, EXT_GIC_ID_I2C1, EXT_GIC_ID_I2C2, EXT_GIC_ID_I2C3,
 140             EXT_GIC_ID_I2C4, EXT_GIC_ID_I2C5, EXT_GIC_ID_I2C6,
 141             EXT_GIC_ID_I2C7 },
 142     /* int combiner group 28 */
 143     { EXT_GIC_ID_SPI0, EXT_GIC_ID_SPI1, EXT_GIC_ID_SPI2 , EXT_GIC_ID_USB_HOST},
 144     /* int combiner group 29 */
 145     { EXT_GIC_ID_HSMMC0, EXT_GIC_ID_HSMMC1, EXT_GIC_ID_HSMMC2,
 146      EXT_GIC_ID_HSMMC3, EXT_GIC_ID_SDMMC },
 147     /* int combiner group 30 */
 148     { EXT_GIC_ID_MIPI_CSI_4LANE, EXT_GIC_ID_MIPI_CSI_2LANE },
 149     /* int combiner group 31 */
 150     { EXT_GIC_ID_MIPI_DSI_4LANE, EXT_GIC_ID_MIPI_DSI_2LANE },
 151     /* int combiner group 32 */
 152     { EXT_GIC_ID_FIMC0, EXT_GIC_ID_FIMC1 },
 153     /* int combiner group 33 */
 154     { EXT_GIC_ID_FIMC2, EXT_GIC_ID_FIMC3 },
 155     /* int combiner group 34 */
 156     { EXT_GIC_ID_ONENAND_AUDI, EXT_GIC_ID_NFC },
 157     /* int combiner group 35 */
 158     { 0, 0, 0, EXT_GIC_ID_MCT_L1, EXT_GIC_ID_MCT_G0, EXT_GIC_ID_MCT_G1 },
 159     /* int combiner group 36 */
 160     { EXT_GIC_ID_MIXER },
 161     /* int combiner group 37 */
 162     { EXT_GIC_ID_EXTINT4, EXT_GIC_ID_EXTINT5, EXT_GIC_ID_EXTINT6,
 163      EXT_GIC_ID_EXTINT7 },
 164     /* groups 38-50 */
 165     { }, { }, { }, { }, { }, { }, { }, { }, { }, { }, { }, { }, { },
 166     /* int combiner group 51 */
 167     { EXT_GIC_ID_MCT_L0, 0, 0, 0, EXT_GIC_ID_MCT_G0, EXT_GIC_ID_MCT_G1 },
 168     /* group 52 */
 169     { },
 170     /* int combiner group 53 */
 171     { EXT_GIC_ID_WDT, 0, 0, 0, EXT_GIC_ID_MCT_G0, EXT_GIC_ID_MCT_G1 },
 172     /* groups 54-63 */
 173     { }, { }, { }, { }, { }, { }, { }, { }, { }, { }
 174 };
 175
 176 #define EXYNOS4210_GIC_NIRQ 160
 177
 178 #define EXYNOS4210_EXT_GIC_CPU_REGION_SIZE     0x10000
 179 #define EXYNOS4210_EXT_GIC_DIST_REGION_SIZE    0x10000
 180
 181 #define EXYNOS4210_EXT_GIC_PER_CPU_OFFSET      0x8000
 182 #define EXYNOS4210_EXT_GIC_CPU_GET_OFFSET(n) \
 183     ((n) * EXYNOS4210_EXT_GIC_PER_CPU_OFFSET)
 184 #define EXYNOS4210_EXT_GIC_DIST_GET_OFFSET(n) \
 185     ((n) * EXYNOS4210_EXT_GIC_PER_CPU_OFFSET)
 186
 187 #define EXYNOS4210_GIC_CPU_REGION_SIZE  0x100
 188 #define EXYNOS4210_GIC_DIST_REGION_SIZE 0x1000
 189
 190 static void exynos4210_irq_handler(void *opaque, int irq, int level)
 191 {
 192     Exynos4210Irq *s = (Exynos4210Irq *)opaque;
 193
 194     /* Bypass */
 195     qemu_set_irq(s->board_irqs[irq], level);
 196 }
 197
 198 /*
 199  * Initialize exynos4210 IRQ subsystem stub.
 200  */
 201 qemu_irq *exynos4210_init_irq(Exynos4210Irq *s)
 202 {
 203     return qemu_allocate_irqs(exynos4210_irq_handler, s,
 204             EXYNOS4210_MAX_INT_COMBINER_IN_IRQ);
 205 }
 206
 207 /*
 208  * Initialize board IRQs.
 209  * These IRQs contain splitted Int/External Combiner and External Gic IRQs.
 210  */
 211 void exynos4210_init_board_irqs(Exynos4210Irq *s)
 212 {
 213     uint32_t grp, bit, irq_id, n;
 214
 215     for (n = 0; n < EXYNOS4210_MAX_EXT_COMBINER_IN_IRQ; n++) {
 216         s->board_irqs[n] = qemu_irq_split(s->int_combiner_irq[n],
 217                 s->ext_combiner_irq[n]);
 218
 219         irq_id = 0;
 220         if (n == EXYNOS4210_COMBINER_GET_IRQ_NUM(1, 4) ||
 221                 n == EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 4)) {
 222             /* MCT_G0 is passed to External GIC */
 223             irq_id = EXT_GIC_ID_MCT_G0;
 224         }
 225         if (n == EXYNOS4210_COMBINER_GET_IRQ_NUM(1, 5) ||
 226                 n == EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 5)) {
 227             /* MCT_G1 is passed to External and GIC */
 228             irq_id = EXT_GIC_ID_MCT_G1;
 229         }
 230         if (irq_id) {
 231             s->board_irqs[n] = qemu_irq_split(s->int_combiner_irq[n],
 232                     s->ext_gic_irq[irq_id-32]);
 233         }
 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 int exynos4210_gic_init(SysBusDevice *sbd)
 285 {
 286     DeviceState *dev = DEVICE(sbd);
 287     Exynos4210GicState *s = EXYNOS4210_GIC(dev);
 288     uint32_t i;
 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 *busdev;
 294
 295     s->gic = qdev_create(NULL, "arm_gic");
 296     qdev_prop_set_uint32(s->gic, "num-cpu", s->num_cpu);
 297     qdev_prop_set_uint32(s->gic, "num-irq", EXYNOS4210_GIC_NIRQ);
 298     qdev_init_nofail(s->gic);
 299     busdev = SYS_BUS_DEVICE(s->gic);
 300
 301     /* Pass through outbound IRQ lines from the GIC */
 302     sysbus_pass_irq(sbd, busdev);
 303
 304     /* Pass through inbound GPIO lines to the GIC */
 305     qdev_init_gpio_in(dev, exynos4210_gic_set_irq,
 306                       EXYNOS4210_GIC_NIRQ - 32);
 307
 308     memory_region_init(&s->cpu_container, OBJECT(s), "exynos4210-cpu-container",
 309             EXYNOS4210_EXT_GIC_CPU_REGION_SIZE);
 310     memory_region_init(&s->dist_container, OBJECT(s), "exynos4210-dist-container",
 311             EXYNOS4210_EXT_GIC_DIST_REGION_SIZE);
 312
 313     for (i = 0; i < s->num_cpu; i++) {
 314         /* Map CPU interface per SMP Core */
 315         sprintf(cpu_alias_name, "%s%x", cpu_prefix, i);
 316         memory_region_init_alias(&s->cpu_alias[i], OBJECT(s),
 317                                  cpu_alias_name,
 318                                  sysbus_mmio_get_region(busdev, 1),
 319                                  0,
 320                                  EXYNOS4210_GIC_CPU_REGION_SIZE);
 321         memory_region_add_subregion(&s->cpu_container,
 322                 EXYNOS4210_EXT_GIC_CPU_GET_OFFSET(i), &s->cpu_alias[i]);
 323
 324         /* Map Distributor per SMP Core */
 325         sprintf(dist_alias_name, "%s%x", dist_prefix, i);
 326         memory_region_init_alias(&s->dist_alias[i], OBJECT(s),
 327                                  dist_alias_name,
 328                                  sysbus_mmio_get_region(busdev, 0),
 329                                  0,
 330                                  EXYNOS4210_GIC_DIST_REGION_SIZE);
 331         memory_region_add_subregion(&s->dist_container,
 332                 EXYNOS4210_EXT_GIC_DIST_GET_OFFSET(i), &s->dist_alias[i]);
 333     }
 334
 335     sysbus_init_mmio(sbd, &s->cpu_container);
 336     sysbus_init_mmio(sbd, &s->dist_container);
 337
 338     return 0;
 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     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 350
 351     k->init = exynos4210_gic_init;
 352     dc->props = exynos4210_gic_properties;
 353 }
 354
 355 static const TypeInfo exynos4210_gic_info = {
 356     .name          = TYPE_EXYNOS4210_GIC,
 357     .parent        = TYPE_SYS_BUS_DEVICE,
 358     .instance_size = sizeof(Exynos4210GicState),
 359     .class_init    = exynos4210_gic_class_init,
 360 };
 361
 362 static void exynos4210_gic_register_types(void)
 363 {
 364     type_register_static(&exynos4210_gic_info);
 365 }
 366
 367 type_init(exynos4210_gic_register_types)
 368
 369 /* IRQ OR Gate struct.
 370  *
 371  * This device models an OR gate. There are n_in input qdev gpio lines and one
 372  * output sysbus IRQ line. The output IRQ level is formed as OR between all
 373  * gpio inputs.
 374  */
 375
 376 #define TYPE_EXYNOS4210_IRQ_GATE "exynos4210.irq_gate"
 377 #define EXYNOS4210_IRQ_GATE(obj) \
 378     OBJECT_CHECK(Exynos4210IRQGateState, (obj), TYPE_EXYNOS4210_IRQ_GATE)
 379
 380 typedef struct Exynos4210IRQGateState {
 381     SysBusDevice parent_obj;
 382
 383     uint32_t n_in;      /* inputs amount */
 384     uint32_t *level;    /* input levels */
 385     qemu_irq out;       /* output IRQ */
 386 } Exynos4210IRQGateState;
 387
 388 static Property exynos4210_irq_gate_properties[] = {
 389     DEFINE_PROP_UINT32("n_in", Exynos4210IRQGateState, n_in, 1),
 390     DEFINE_PROP_END_OF_LIST(),
 391 };
 392
 393 static const VMStateDescription vmstate_exynos4210_irq_gate = {
 394     .name = "exynos4210.irq_gate",
 395     .version_id = 2,
 396     .minimum_version_id = 2,
 397     .fields = (VMStateField[]) {
 398         VMSTATE_VBUFFER_UINT32(level, Exynos4210IRQGateState, 1, NULL, 0, n_in),
 399         VMSTATE_END_OF_LIST()
 400     }
 401 };
 402
 403 /* Process a change in IRQ input. */
 404 static void exynos4210_irq_gate_handler(void *opaque, int irq, int level)
 405 {
 406     Exynos4210IRQGateState *s = (Exynos4210IRQGateState *)opaque;
 407     uint32_t i;
 408
 409     assert(irq < s->n_in);
 410
 411     s->level[irq] = level;
 412
 413     for (i = 0; i < s->n_in; i++) {
 414         if (s->level[i] >= 1) {
 415             qemu_irq_raise(s->out);
 416             return;
 417         }
 418     }
 419
 420     qemu_irq_lower(s->out);
 421 }
 422
 423 static void exynos4210_irq_gate_reset(DeviceState *d)
 424 {
 425     Exynos4210IRQGateState *s = EXYNOS4210_IRQ_GATE(d);
 426
 427     memset(s->level, 0, s->n_in * sizeof(*s->level));
 428 }
 429
 430 /*
 431  * IRQ Gate initialization.
 432  */
 433 static int exynos4210_irq_gate_init(SysBusDevice *sbd)
 434 {
 435     DeviceState *dev = DEVICE(sbd);
 436     Exynos4210IRQGateState *s = EXYNOS4210_IRQ_GATE(dev);
 437
 438     /* Allocate general purpose input signals and connect a handler to each of
 439      * them */
 440     qdev_init_gpio_in(dev, exynos4210_irq_gate_handler, s->n_in);
 441
 442     s->level = g_malloc0(s->n_in * sizeof(*s->level));
 443
 444     sysbus_init_irq(sbd, &s->out);
 445
 446     return 0;
 447 }
 448
 449 static void exynos4210_irq_gate_class_init(ObjectClass *klass, void *data)
 450 {
 451     DeviceClass *dc = DEVICE_CLASS(klass);
 452     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 453
 454     k->init = exynos4210_irq_gate_init;
 455     dc->reset = exynos4210_irq_gate_reset;
 456     dc->vmsd = &vmstate_exynos4210_irq_gate;
 457     dc->props = exynos4210_irq_gate_properties;
 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     .class_init    = exynos4210_irq_gate_class_init,
 465 };
 466
 467 static void exynos4210_irq_gate_register_types(void)
 468 {
 469     type_register_static(&exynos4210_irq_gate_info);
 470 }
 471
 472 type_init(exynos4210_irq_gate_register_types)