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 typedef struct {
 264     SysBusDevice busdev;
 265     MemoryRegion cpu_container;
 266     MemoryRegion dist_container;
 267     MemoryRegion cpu_alias[EXYNOS4210_NCPUS];
 268     MemoryRegion dist_alias[EXYNOS4210_NCPUS];
 269     uint32_t num_cpu;
 270     DeviceState *gic;
 271 } Exynos4210GicState;
 272
 273 static void exynos4210_gic_set_irq(void *opaque, int irq, int level)
 274 {
 275     Exynos4210GicState *s = (Exynos4210GicState *)opaque;
 276     qemu_set_irq(qdev_get_gpio_in(s->gic, irq), level);
 277 }
 278
 279 static int exynos4210_gic_init(SysBusDevice *dev)
 280 {
 281     Exynos4210GicState *s = FROM_SYSBUS(Exynos4210GicState, dev);
 282     uint32_t i;
 283     const char cpu_prefix[] = "exynos4210-gic-alias_cpu";
 284     const char dist_prefix[] = "exynos4210-gic-alias_dist";
 285     char cpu_alias_name[sizeof(cpu_prefix) + 3];
 286     char dist_alias_name[sizeof(cpu_prefix) + 3];
 287     SysBusDevice *busdev;
 288
 289     s->gic = qdev_create(NULL, "arm_gic");
 290     qdev_prop_set_uint32(s->gic, "num-cpu", s->num_cpu);
 291     qdev_prop_set_uint32(s->gic, "num-irq", EXYNOS4210_GIC_NIRQ);
 292     qdev_init_nofail(s->gic);
 293     busdev = SYS_BUS_DEVICE(s->gic);
 294
 295     /* Pass through outbound IRQ lines from the GIC */
 296     sysbus_pass_irq(dev, busdev);
 297
 298     /* Pass through inbound GPIO lines to the GIC */
 299     qdev_init_gpio_in(&s->busdev.qdev, exynos4210_gic_set_irq,
 300                       EXYNOS4210_GIC_NIRQ - 32);
 301
 302     memory_region_init(&s->cpu_container, "exynos4210-cpu-container",
 303             EXYNOS4210_EXT_GIC_CPU_REGION_SIZE);
 304     memory_region_init(&s->dist_container, "exynos4210-dist-container",
 305             EXYNOS4210_EXT_GIC_DIST_REGION_SIZE);
 306
 307     for (i = 0; i < s->num_cpu; i++) {
 308         /* Map CPU interface per SMP Core */
 309         sprintf(cpu_alias_name, "%s%x", cpu_prefix, i);
 310         memory_region_init_alias(&s->cpu_alias[i],
 311                                  cpu_alias_name,
 312                                  sysbus_mmio_get_region(busdev, 1),
 313                                  0,
 314                                  EXYNOS4210_GIC_CPU_REGION_SIZE);
 315         memory_region_add_subregion(&s->cpu_container,
 316                 EXYNOS4210_EXT_GIC_CPU_GET_OFFSET(i), &s->cpu_alias[i]);
 317
 318         /* Map Distributor per SMP Core */
 319         sprintf(dist_alias_name, "%s%x", dist_prefix, i);
 320         memory_region_init_alias(&s->dist_alias[i],
 321                                  dist_alias_name,
 322                                  sysbus_mmio_get_region(busdev, 0),
 323                                  0,
 324                                  EXYNOS4210_GIC_DIST_REGION_SIZE);
 325         memory_region_add_subregion(&s->dist_container,
 326                 EXYNOS4210_EXT_GIC_DIST_GET_OFFSET(i), &s->dist_alias[i]);
 327     }
 328
 329     sysbus_init_mmio(dev, &s->cpu_container);
 330     sysbus_init_mmio(dev, &s->dist_container);
 331
 332     return 0;
 333 }
 334
 335 static Property exynos4210_gic_properties[] = {
 336     DEFINE_PROP_UINT32("num-cpu", Exynos4210GicState, num_cpu, 1),
 337     DEFINE_PROP_END_OF_LIST(),
 338 };
 339
 340 static void exynos4210_gic_class_init(ObjectClass *klass, void *data)
 341 {
 342     DeviceClass *dc = DEVICE_CLASS(klass);
 343     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 344
 345     k->init = exynos4210_gic_init;
 346     dc->props = exynos4210_gic_properties;
 347 }
 348
 349 static const TypeInfo exynos4210_gic_info = {
 350     .name          = "exynos4210.gic",
 351     .parent        = TYPE_SYS_BUS_DEVICE,
 352     .instance_size = sizeof(Exynos4210GicState),
 353     .class_init    = exynos4210_gic_class_init,
 354 };
 355
 356 static void exynos4210_gic_register_types(void)
 357 {
 358     type_register_static(&exynos4210_gic_info);
 359 }
 360
 361 type_init(exynos4210_gic_register_types)
 362
 363 /* IRQ OR Gate struct.
 364  *
 365  * This device models an OR gate. There are n_in input qdev gpio lines and one
 366  * output sysbus IRQ line. The output IRQ level is formed as OR between all
 367  * gpio inputs.
 368  */
 369 typedef struct {
 370     SysBusDevice busdev;
 371
 372     uint32_t n_in;      /* inputs amount */
 373     uint32_t *level;    /* input levels */
 374     qemu_irq out;       /* output IRQ */
 375 } Exynos4210IRQGateState;
 376
 377 static Property exynos4210_irq_gate_properties[] = {
 378     DEFINE_PROP_UINT32("n_in", Exynos4210IRQGateState, n_in, 1),
 379     DEFINE_PROP_END_OF_LIST(),
 380 };
 381
 382 static const VMStateDescription vmstate_exynos4210_irq_gate = {
 383     .name = "exynos4210.irq_gate",
 384     .version_id = 2,
 385     .minimum_version_id = 2,
 386     .minimum_version_id_old = 2,
 387     .fields = (VMStateField[]) {
 388         VMSTATE_VBUFFER_UINT32(level, Exynos4210IRQGateState, 1, NULL, 0, n_in),
 389         VMSTATE_END_OF_LIST()
 390     }
 391 };
 392
 393 /* Process a change in IRQ input. */
 394 static void exynos4210_irq_gate_handler(void *opaque, int irq, int level)
 395 {
 396     Exynos4210IRQGateState *s = (Exynos4210IRQGateState *)opaque;
 397     uint32_t i;
 398
 399     assert(irq < s->n_in);
 400
 401     s->level[irq] = level;
 402
 403     for (i = 0; i < s->n_in; i++) {
 404         if (s->level[i] >= 1) {
 405             qemu_irq_raise(s->out);
 406             return;
 407         }
 408     }
 409
 410     qemu_irq_lower(s->out);
 411 }
 412
 413 static void exynos4210_irq_gate_reset(DeviceState *d)
 414 {
 415     Exynos4210IRQGateState *s =
 416             DO_UPCAST(Exynos4210IRQGateState, busdev.qdev, d);
 417
 418     memset(s->level, 0, s->n_in * sizeof(*s->level));
 419 }
 420
 421 /*
 422  * IRQ Gate initialization.
 423  */
 424 static int exynos4210_irq_gate_init(SysBusDevice *dev)
 425 {
 426     Exynos4210IRQGateState *s = FROM_SYSBUS(Exynos4210IRQGateState, dev);
 427
 428     /* Allocate general purpose input signals and connect a handler to each of
 429      * them */
 430     qdev_init_gpio_in(&s->busdev.qdev, exynos4210_irq_gate_handler, s->n_in);
 431
 432     s->level = g_malloc0(s->n_in * sizeof(*s->level));
 433
 434     sysbus_init_irq(dev, &s->out);
 435
 436     return 0;
 437 }
 438
 439 static void exynos4210_irq_gate_class_init(ObjectClass *klass, void *data)
 440 {
 441     DeviceClass *dc = DEVICE_CLASS(klass);
 442     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 443
 444     k->init = exynos4210_irq_gate_init;
 445     dc->reset = exynos4210_irq_gate_reset;
 446     dc->vmsd = &vmstate_exynos4210_irq_gate;
 447     dc->props = exynos4210_irq_gate_properties;
 448 }
 449
 450 static const TypeInfo exynos4210_irq_gate_info = {
 451     .name          = "exynos4210.irq_gate",
 452     .parent        = TYPE_SYS_BUS_DEVICE,
 453     .instance_size = sizeof(Exynos4210IRQGateState),
 454     .class_init    = exynos4210_irq_gate_class_init,
 455 };
 456
 457 static void exynos4210_irq_gate_register_types(void)
 458 {
 459     type_register_static(&exynos4210_irq_gate_info);
 460 }
 461
 462 type_init(exynos4210_irq_gate_register_types)