arch/arm/mach-msm/irq-vic.c

   1 /*
   2  * Copyright (C) 2007 Google, Inc.
   3  * Copyright (c) 2009, Code Aurora Forum. All rights reserved.
   4  *
   5  * This software is licensed under the terms of the GNU General Public
   6  * License version 2, as published by the Free Software Foundation, and
   7  * may be copied, distributed, and modified under those terms.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  */
  15
  16 #include <linux/init.h>
  17 #include <linux/module.h>
  18 #include <linux/sched.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/ptrace.h>
  21 #include <linux/timer.h>
  22 #include <linux/irq.h>
  23 #include <linux/io.h>
  24
  25 #include <asm/cacheflush.h>
  26
  27 #include <mach/hardware.h>
  28
  29 #include <mach/msm_iomap.h>
  30
  31 #include "smd_private.h"
  32
  33 enum {
  34         IRQ_DEBUG_SLEEP_INT_TRIGGER = 1U << 0,
  35         IRQ_DEBUG_SLEEP_INT = 1U << 1,
  36         IRQ_DEBUG_SLEEP_ABORT = 1U << 2,
  37         IRQ_DEBUG_SLEEP = 1U << 3,
  38         IRQ_DEBUG_SLEEP_REQUEST = 1U << 4,
  39 };
  40 static int msm_irq_debug_mask;
  41 module_param_named(debug_mask, msm_irq_debug_mask, int,
  42                    S_IRUGO | S_IWUSR | S_IWGRP);
  43
  44 #define VIC_REG(off) (MSM_VIC_BASE + (off))
  45 #define VIC_INT_TO_REG_ADDR(base, irq) (base + (irq / 32) * 4)
  46 #define VIC_INT_TO_REG_INDEX(irq) ((irq >> 5) & 3)
  47
  48 #define VIC_INT_SELECT0     VIC_REG(0x0000)  /* 1: FIQ, 0: IRQ */
  49 #define VIC_INT_SELECT1     VIC_REG(0x0004)  /* 1: FIQ, 0: IRQ */
  50 #define VIC_INT_SELECT2     VIC_REG(0x0008)  /* 1: FIQ, 0: IRQ */
  51 #define VIC_INT_SELECT3     VIC_REG(0x000C)  /* 1: FIQ, 0: IRQ */
  52 #define VIC_INT_EN0         VIC_REG(0x0010)
  53 #define VIC_INT_EN1         VIC_REG(0x0014)
  54 #define VIC_INT_EN2         VIC_REG(0x0018)
  55 #define VIC_INT_EN3         VIC_REG(0x001C)
  56 #define VIC_INT_ENCLEAR0    VIC_REG(0x0020)
  57 #define VIC_INT_ENCLEAR1    VIC_REG(0x0024)
  58 #define VIC_INT_ENCLEAR2    VIC_REG(0x0028)
  59 #define VIC_INT_ENCLEAR3    VIC_REG(0x002C)
  60 #define VIC_INT_ENSET0      VIC_REG(0x0030)
  61 #define VIC_INT_ENSET1      VIC_REG(0x0034)
  62 #define VIC_INT_ENSET2      VIC_REG(0x0038)
  63 #define VIC_INT_ENSET3      VIC_REG(0x003C)
  64 #define VIC_INT_TYPE0       VIC_REG(0x0040)  /* 1: EDGE, 0: LEVEL  */
  65 #define VIC_INT_TYPE1       VIC_REG(0x0044)  /* 1: EDGE, 0: LEVEL  */
  66 #define VIC_INT_TYPE2       VIC_REG(0x0048)  /* 1: EDGE, 0: LEVEL  */
  67 #define VIC_INT_TYPE3       VIC_REG(0x004C)  /* 1: EDGE, 0: LEVEL  */
  68 #define VIC_INT_POLARITY0   VIC_REG(0x0050)  /* 1: NEG, 0: POS */
  69 #define VIC_INT_POLARITY1   VIC_REG(0x0054)  /* 1: NEG, 0: POS */
  70 #define VIC_INT_POLARITY2   VIC_REG(0x0058)  /* 1: NEG, 0: POS */
  71 #define VIC_INT_POLARITY3   VIC_REG(0x005C)  /* 1: NEG, 0: POS */
  72 #define VIC_NO_PEND_VAL     VIC_REG(0x0060)
  73
  74 #if defined(CONFIG_ARCH_MSM_SCORPION)
  75 #define VIC_NO_PEND_VAL_FIQ VIC_REG(0x0064)
  76 #define VIC_INT_MASTEREN    VIC_REG(0x0068)  /* 1: IRQ, 2: FIQ     */
  77 #define VIC_CONFIG          VIC_REG(0x006C)  /* 1: USE SC VIC */
  78 #else
  79 #define VIC_INT_MASTEREN    VIC_REG(0x0064)  /* 1: IRQ, 2: FIQ     */
  80 #define VIC_PROTECTION      VIC_REG(0x006C)  /* 1: ENABLE          */
  81 #define VIC_CONFIG          VIC_REG(0x0068)  /* 1: USE ARM1136 VIC */
  82 #endif
  83
  84 #define VIC_IRQ_STATUS0     VIC_REG(0x0080)
  85 #define VIC_IRQ_STATUS1     VIC_REG(0x0084)
  86 #define VIC_IRQ_STATUS2     VIC_REG(0x0088)
  87 #define VIC_IRQ_STATUS3     VIC_REG(0x008C)
  88 #define VIC_FIQ_STATUS0     VIC_REG(0x0090)
  89 #define VIC_FIQ_STATUS1     VIC_REG(0x0094)
  90 #define VIC_FIQ_STATUS2     VIC_REG(0x0098)
  91 #define VIC_FIQ_STATUS3     VIC_REG(0x009C)
  92 #define VIC_RAW_STATUS0     VIC_REG(0x00A0)
  93 #define VIC_RAW_STATUS1     VIC_REG(0x00A4)
  94 #define VIC_RAW_STATUS2     VIC_REG(0x00A8)
  95 #define VIC_RAW_STATUS3     VIC_REG(0x00AC)
  96 #define VIC_INT_CLEAR0      VIC_REG(0x00B0)
  97 #define VIC_INT_CLEAR1      VIC_REG(0x00B4)
  98 #define VIC_INT_CLEAR2      VIC_REG(0x00B8)
  99 #define VIC_INT_CLEAR3      VIC_REG(0x00BC)
 100 #define VIC_SOFTINT0        VIC_REG(0x00C0)
 101 #define VIC_SOFTINT1        VIC_REG(0x00C4)
 102 #define VIC_SOFTINT2        VIC_REG(0x00C8)
 103 #define VIC_SOFTINT3        VIC_REG(0x00CC)
 104 #define VIC_IRQ_VEC_RD      VIC_REG(0x00D0)  /* pending int # */
 105 #define VIC_IRQ_VEC_PEND_RD VIC_REG(0x00D4)  /* pending vector addr */
 106 #define VIC_IRQ_VEC_WR      VIC_REG(0x00D8)
 107
 108 #if defined(CONFIG_ARCH_MSM_SCORPION)
 109 #define VIC_FIQ_VEC_RD      VIC_REG(0x00DC)
 110 #define VIC_FIQ_VEC_PEND_RD VIC_REG(0x00E0)
 111 #define VIC_FIQ_VEC_WR      VIC_REG(0x00E4)
 112 #define VIC_IRQ_IN_SERVICE  VIC_REG(0x00E8)
 113 #define VIC_IRQ_IN_STACK    VIC_REG(0x00EC)
 114 #define VIC_FIQ_IN_SERVICE  VIC_REG(0x00F0)
 115 #define VIC_FIQ_IN_STACK    VIC_REG(0x00F4)
 116 #define VIC_TEST_BUS_SEL    VIC_REG(0x00F8)
 117 #define VIC_IRQ_CTRL_CONFIG VIC_REG(0x00FC)
 118 #else
 119 #define VIC_IRQ_IN_SERVICE  VIC_REG(0x00E0)
 120 #define VIC_IRQ_IN_STACK    VIC_REG(0x00E4)
 121 #define VIC_TEST_BUS_SEL    VIC_REG(0x00E8)
 122 #endif
 123
 124 #define VIC_VECTPRIORITY(n) VIC_REG(0x0200+((n) * 4))
 125 #define VIC_VECTADDR(n)     VIC_REG(0x0400+((n) * 4))
 126
 127 #if defined(CONFIG_ARCH_MSM7X30)
 128 #define VIC_NUM_REGS        4
 129 #else
 130 #define VIC_NUM_REGS        2
 131 #endif
 132
 133 #if VIC_NUM_REGS == 2
 134 #define DPRINT_REGS(base_reg, format, ...)                              \
 135         printk(KERN_INFO format " %x %x\n", ##__VA_ARGS__,              \
 136                         readl(base_reg ## 0), readl(base_reg ## 1))
 137 #define DPRINT_ARRAY(array, format, ...)                                \
 138         printk(KERN_INFO format " %x %x\n", ##__VA_ARGS__,              \
 139                         array[0], array[1])
 140 #elif VIC_NUM_REGS == 4
 141 #define DPRINT_REGS(base_reg, format, ...) \
 142         printk(KERN_INFO format " %x %x %x %x\n", ##__VA_ARGS__,        \
 143                         readl(base_reg ## 0), readl(base_reg ## 1),     \
 144                         readl(base_reg ## 2), readl(base_reg ## 3))
 145 #define DPRINT_ARRAY(array, format, ...)                                \
 146         printk(KERN_INFO format " %x %x %x %x\n", ##__VA_ARGS__,        \
 147                         array[0], array[1],                             \
 148                         array[2], array[3])
 149 #else
 150 #error "VIC_NUM_REGS set to illegal value"
 151 #endif
 152
 153 static uint32_t msm_irq_smsm_wake_enable[2];
 154 static struct {
 155         uint32_t int_en[2];
 156         uint32_t int_type;
 157         uint32_t int_polarity;
 158         uint32_t int_select;
 159 } msm_irq_shadow_reg[VIC_NUM_REGS];
 160 static uint32_t msm_irq_idle_disable[VIC_NUM_REGS];
 161
 162 #define SMSM_FAKE_IRQ (0xff)
 163 static uint8_t msm_irq_to_smsm[NR_IRQS] = {
 164         [INT_MDDI_EXT] = 1,
 165         [INT_MDDI_PRI] = 2,
 166         [INT_MDDI_CLIENT] = 3,
 167         [INT_USB_OTG] = 4,
 168
 169         [INT_PWB_I2C] = 5,
 170         [INT_SDC1_0] = 6,
 171         [INT_SDC1_1] = 7,
 172         [INT_SDC2_0] = 8,
 173
 174         [INT_SDC2_1] = 9,
 175         [INT_ADSP_A9_A11] = 10,
 176         [INT_UART1] = 11,
 177         [INT_UART2] = 12,
 178
 179         [INT_UART3] = 13,
 180         [INT_UART1_RX] = 14,
 181         [INT_UART2_RX] = 15,
 182         [INT_UART3_RX] = 16,
 183
 184         [INT_UART1DM_IRQ] = 17,
 185         [INT_UART1DM_RX] = 18,
 186         [INT_KEYSENSE] = 19,
 187 #if !defined(CONFIG_ARCH_MSM7X30)
 188         [INT_AD_HSSD] = 20,
 189 #endif
 190
 191         [INT_NAND_WR_ER_DONE] = 21,
 192         [INT_NAND_OP_DONE] = 22,
 193         [INT_TCHSCRN1] = 23,
 194         [INT_TCHSCRN2] = 24,
 195
 196         [INT_TCHSCRN_SSBI] = 25,
 197         [INT_USB_HS] = 26,
 198         [INT_UART2DM_RX] = 27,
 199         [INT_UART2DM_IRQ] = 28,
 200
 201         [INT_SDC4_1] = 29,
 202         [INT_SDC4_0] = 30,
 203         [INT_SDC3_1] = 31,
 204         [INT_SDC3_0] = 32,
 205
 206         /* fake wakeup interrupts */
 207         [INT_GPIO_GROUP1] = SMSM_FAKE_IRQ,
 208         [INT_GPIO_GROUP2] = SMSM_FAKE_IRQ,
 209         [INT_A9_M2A_0] = SMSM_FAKE_IRQ,
 210         [INT_A9_M2A_1] = SMSM_FAKE_IRQ,
 211         [INT_A9_M2A_5] = SMSM_FAKE_IRQ,
 212         [INT_GP_TIMER_EXP] = SMSM_FAKE_IRQ,
 213         [INT_DEBUG_TIMER_EXP] = SMSM_FAKE_IRQ,
 214         [INT_ADSP_A11] = SMSM_FAKE_IRQ,
 215 #ifdef CONFIG_ARCH_QSD8X50
 216         [INT_SIRC_0] = SMSM_FAKE_IRQ,
 217         [INT_SIRC_1] = SMSM_FAKE_IRQ,
 218 #endif
 219 };
 220
 221 static inline void msm_irq_write_all_regs(void __iomem *base, unsigned int val)
 222 {
 223         int i;
 224
 225         for (i = 0; i < VIC_NUM_REGS; i++)
 226                 writel(val, base + (i * 4));
 227 }
 228
 229 static void msm_irq_ack(struct irq_data *d)
 230 {
 231         void __iomem *reg = VIC_INT_TO_REG_ADDR(VIC_INT_CLEAR0, d->irq);
 232         writel(1 << (d->irq & 31), reg);
 233 }
 234
 235 static void msm_irq_mask(struct irq_data *d)
 236 {
 237         void __iomem *reg = VIC_INT_TO_REG_ADDR(VIC_INT_ENCLEAR0, d->irq);
 238         unsigned index = VIC_INT_TO_REG_INDEX(d->irq);
 239         uint32_t mask = 1UL << (d->irq & 31);
 240         int smsm_irq = msm_irq_to_smsm[d->irq];
 241
 242         msm_irq_shadow_reg[index].int_en[0] &= ~mask;
 243         writel(mask, reg);
 244         if (smsm_irq == 0)
 245                 msm_irq_idle_disable[index] &= ~mask;
 246         else {
 247                 mask = 1UL << (smsm_irq - 1);
 248                 msm_irq_smsm_wake_enable[0] &= ~mask;
 249         }
 250 }
 251
 252 static void msm_irq_unmask(struct irq_data *d)
 253 {
 254         void __iomem *reg = VIC_INT_TO_REG_ADDR(VIC_INT_ENSET0, d->irq);
 255         unsigned index = VIC_INT_TO_REG_INDEX(d->irq);
 256         uint32_t mask = 1UL << (d->irq & 31);
 257         int smsm_irq = msm_irq_to_smsm[d->irq];
 258
 259         msm_irq_shadow_reg[index].int_en[0] |= mask;
 260         writel(mask, reg);
 261
 262         if (smsm_irq == 0)
 263                 msm_irq_idle_disable[index] |= mask;
 264         else {
 265                 mask = 1UL << (smsm_irq - 1);
 266                 msm_irq_smsm_wake_enable[0] |= mask;
 267         }
 268 }
 269
 270 static int msm_irq_set_wake(struct irq_data *d, unsigned int on)
 271 {
 272         unsigned index = VIC_INT_TO_REG_INDEX(d->irq);
 273         uint32_t mask = 1UL << (d->irq & 31);
 274         int smsm_irq = msm_irq_to_smsm[d->irq];
 275
 276         if (smsm_irq == 0) {
 277                 printk(KERN_ERR "msm_irq_set_wake: bad wakeup irq %d\n", d->irq);
 278                 return -EINVAL;
 279         }
 280         if (on)
 281                 msm_irq_shadow_reg[index].int_en[1] |= mask;
 282         else
 283                 msm_irq_shadow_reg[index].int_en[1] &= ~mask;
 284
 285         if (smsm_irq == SMSM_FAKE_IRQ)
 286                 return 0;
 287
 288         mask = 1UL << (smsm_irq - 1);
 289         if (on)
 290                 msm_irq_smsm_wake_enable[1] |= mask;
 291         else
 292                 msm_irq_smsm_wake_enable[1] &= ~mask;
 293         return 0;
 294 }
 295
 296 static int msm_irq_set_type(struct irq_data *d, unsigned int flow_type)
 297 {
 298         void __iomem *treg = VIC_INT_TO_REG_ADDR(VIC_INT_TYPE0, d->irq);
 299         void __iomem *preg = VIC_INT_TO_REG_ADDR(VIC_INT_POLARITY0, d->irq);
 300         unsigned index = VIC_INT_TO_REG_INDEX(d->irq);
 301         int b = 1 << (d->irq & 31);
 302         uint32_t polarity;
 303         uint32_t type;
 304
 305         polarity = msm_irq_shadow_reg[index].int_polarity;
 306         if (flow_type & (IRQF_TRIGGER_FALLING | IRQF_TRIGGER_LOW))
 307                 polarity |= b;
 308         if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_HIGH))
 309                 polarity &= ~b;
 310         writel(polarity, preg);
 311         msm_irq_shadow_reg[index].int_polarity = polarity;
 312
 313         type = msm_irq_shadow_reg[index].int_type;
 314         if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {
 315                 type |= b;
 316                 __irq_set_handler_locked(d->irq, handle_edge_irq);
 317         }
 318         if (flow_type & (IRQF_TRIGGER_HIGH | IRQF_TRIGGER_LOW)) {
 319                 type &= ~b;
 320                 __irq_set_handler_locked(d->irq, handle_level_irq);
 321         }
 322         writel(type, treg);
 323         msm_irq_shadow_reg[index].int_type = type;
 324         return 0;
 325 }
 326
 327 static struct irq_chip msm_irq_chip = {
 328         .name          = "msm",
 329         .irq_disable   = msm_irq_mask,
 330         .irq_ack       = msm_irq_ack,
 331         .irq_mask      = msm_irq_mask,
 332         .irq_unmask    = msm_irq_unmask,
 333         .irq_set_wake  = msm_irq_set_wake,
 334         .irq_set_type  = msm_irq_set_type,
 335 };
 336
 337 void __init msm_init_irq(void)
 338 {
 339         unsigned n;
 340
 341         /* select level interrupts */
 342         msm_irq_write_all_regs(VIC_INT_TYPE0, 0);
 343
 344         /* select highlevel interrupts */
 345         msm_irq_write_all_regs(VIC_INT_POLARITY0, 0);
 346
 347         /* select IRQ for all INTs */
 348         msm_irq_write_all_regs(VIC_INT_SELECT0, 0);
 349
 350         /* disable all INTs */
 351         msm_irq_write_all_regs(VIC_INT_EN0, 0);
 352
 353         /* don't use vic */
 354         writel(0, VIC_CONFIG);
 355
 356         /* enable interrupt controller */
 357         writel(3, VIC_INT_MASTEREN);
 358
 359         for (n = 0; n < NR_MSM_IRQS; n++) {
 360                 irq_set_chip_and_handler(n, &msm_irq_chip, handle_level_irq);
 361                 set_irq_flags(n, IRQF_VALID);
 362         }
 363 }