linux/drivers/gpio/gpio-msm-v1.c
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   1/*
   2 * Copyright (C) 2007 Google, Inc.
   3 * Copyright (c) 2009-2012, The Linux Foundation. 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/bitops.h>
  17#include <linux/gpio.h>
  18#include <linux/interrupt.h>
  19#include <linux/io.h>
  20#include <linux/irq.h>
  21#include <linux/module.h>
  22#include <linux/device.h>
  23#include <linux/platform_device.h>
  24#include <linux/err.h>
  25
  26#include <mach/msm_gpiomux.h>
  27
  28/* see 80-VA736-2 Rev C pp 695-751
  29**
  30** These are actually the *shadow* gpio registers, since the
  31** real ones (which allow full access) are only available to the
  32** ARM9 side of the world.
  33**
  34** Since the _BASE need to be page-aligned when we're mapping them
  35** to virtual addresses, adjust for the additional offset in these
  36** macros.
  37*/
  38
  39#define MSM_GPIO1_REG(off) (off)
  40#define MSM_GPIO2_REG(off) (off)
  41#define MSM_GPIO1_SHADOW_REG(off) (off)
  42#define MSM_GPIO2_SHADOW_REG(off) (off)
  43
  44/*
  45 * MSM7X00 registers
  46 */
  47/* output value */
  48#define MSM7X00_GPIO_OUT_0      MSM_GPIO1_SHADOW_REG(0x00)  /* gpio  15-0  */
  49#define MSM7X00_GPIO_OUT_1      MSM_GPIO2_SHADOW_REG(0x00)  /* gpio  42-16 */
  50#define MSM7X00_GPIO_OUT_2      MSM_GPIO1_SHADOW_REG(0x04)  /* gpio  67-43 */
  51#define MSM7X00_GPIO_OUT_3      MSM_GPIO1_SHADOW_REG(0x08)  /* gpio  94-68 */
  52#define MSM7X00_GPIO_OUT_4      MSM_GPIO1_SHADOW_REG(0x0C)  /* gpio 106-95 */
  53#define MSM7X00_GPIO_OUT_5      MSM_GPIO1_SHADOW_REG(0x50)  /* gpio 107-121 */
  54
  55/* same pin map as above, output enable */
  56#define MSM7X00_GPIO_OE_0       MSM_GPIO1_SHADOW_REG(0x10)
  57#define MSM7X00_GPIO_OE_1       MSM_GPIO2_SHADOW_REG(0x08)
  58#define MSM7X00_GPIO_OE_2       MSM_GPIO1_SHADOW_REG(0x14)
  59#define MSM7X00_GPIO_OE_3       MSM_GPIO1_SHADOW_REG(0x18)
  60#define MSM7X00_GPIO_OE_4       MSM_GPIO1_SHADOW_REG(0x1C)
  61#define MSM7X00_GPIO_OE_5       MSM_GPIO1_SHADOW_REG(0x54)
  62
  63/* same pin map as above, input read */
  64#define MSM7X00_GPIO_IN_0       MSM_GPIO1_SHADOW_REG(0x34)
  65#define MSM7X00_GPIO_IN_1       MSM_GPIO2_SHADOW_REG(0x20)
  66#define MSM7X00_GPIO_IN_2       MSM_GPIO1_SHADOW_REG(0x38)
  67#define MSM7X00_GPIO_IN_3       MSM_GPIO1_SHADOW_REG(0x3C)
  68#define MSM7X00_GPIO_IN_4       MSM_GPIO1_SHADOW_REG(0x40)
  69#define MSM7X00_GPIO_IN_5       MSM_GPIO1_SHADOW_REG(0x44)
  70
  71/* same pin map as above, 1=edge 0=level interrup */
  72#define MSM7X00_GPIO_INT_EDGE_0 MSM_GPIO1_SHADOW_REG(0x60)
  73#define MSM7X00_GPIO_INT_EDGE_1 MSM_GPIO2_SHADOW_REG(0x50)
  74#define MSM7X00_GPIO_INT_EDGE_2 MSM_GPIO1_SHADOW_REG(0x64)
  75#define MSM7X00_GPIO_INT_EDGE_3 MSM_GPIO1_SHADOW_REG(0x68)
  76#define MSM7X00_GPIO_INT_EDGE_4 MSM_GPIO1_SHADOW_REG(0x6C)
  77#define MSM7X00_GPIO_INT_EDGE_5 MSM_GPIO1_SHADOW_REG(0xC0)
  78
  79/* same pin map as above, 1=positive 0=negative */
  80#define MSM7X00_GPIO_INT_POS_0  MSM_GPIO1_SHADOW_REG(0x70)
  81#define MSM7X00_GPIO_INT_POS_1  MSM_GPIO2_SHADOW_REG(0x58)
  82#define MSM7X00_GPIO_INT_POS_2  MSM_GPIO1_SHADOW_REG(0x74)
  83#define MSM7X00_GPIO_INT_POS_3  MSM_GPIO1_SHADOW_REG(0x78)
  84#define MSM7X00_GPIO_INT_POS_4  MSM_GPIO1_SHADOW_REG(0x7C)
  85#define MSM7X00_GPIO_INT_POS_5  MSM_GPIO1_SHADOW_REG(0xBC)
  86
  87/* same pin map as above, interrupt enable */
  88#define MSM7X00_GPIO_INT_EN_0   MSM_GPIO1_SHADOW_REG(0x80)
  89#define MSM7X00_GPIO_INT_EN_1   MSM_GPIO2_SHADOW_REG(0x60)
  90#define MSM7X00_GPIO_INT_EN_2   MSM_GPIO1_SHADOW_REG(0x84)
  91#define MSM7X00_GPIO_INT_EN_3   MSM_GPIO1_SHADOW_REG(0x88)
  92#define MSM7X00_GPIO_INT_EN_4   MSM_GPIO1_SHADOW_REG(0x8C)
  93#define MSM7X00_GPIO_INT_EN_5   MSM_GPIO1_SHADOW_REG(0xB8)
  94
  95/* same pin map as above, write 1 to clear interrupt */
  96#define MSM7X00_GPIO_INT_CLEAR_0        MSM_GPIO1_SHADOW_REG(0x90)
  97#define MSM7X00_GPIO_INT_CLEAR_1        MSM_GPIO2_SHADOW_REG(0x68)
  98#define MSM7X00_GPIO_INT_CLEAR_2        MSM_GPIO1_SHADOW_REG(0x94)
  99#define MSM7X00_GPIO_INT_CLEAR_3        MSM_GPIO1_SHADOW_REG(0x98)
 100#define MSM7X00_GPIO_INT_CLEAR_4        MSM_GPIO1_SHADOW_REG(0x9C)
 101#define MSM7X00_GPIO_INT_CLEAR_5        MSM_GPIO1_SHADOW_REG(0xB4)
 102
 103/* same pin map as above, 1=interrupt pending */
 104#define MSM7X00_GPIO_INT_STATUS_0       MSM_GPIO1_SHADOW_REG(0xA0)
 105#define MSM7X00_GPIO_INT_STATUS_1       MSM_GPIO2_SHADOW_REG(0x70)
 106#define MSM7X00_GPIO_INT_STATUS_2       MSM_GPIO1_SHADOW_REG(0xA4)
 107#define MSM7X00_GPIO_INT_STATUS_3       MSM_GPIO1_SHADOW_REG(0xA8)
 108#define MSM7X00_GPIO_INT_STATUS_4       MSM_GPIO1_SHADOW_REG(0xAC)
 109#define MSM7X00_GPIO_INT_STATUS_5       MSM_GPIO1_SHADOW_REG(0xB0)
 110
 111/*
 112 * QSD8X50 registers
 113 */
 114/* output value */
 115#define QSD8X50_GPIO_OUT_0      MSM_GPIO1_SHADOW_REG(0x00)  /* gpio  15-0   */
 116#define QSD8X50_GPIO_OUT_1      MSM_GPIO2_SHADOW_REG(0x00)  /* gpio  42-16  */
 117#define QSD8X50_GPIO_OUT_2      MSM_GPIO1_SHADOW_REG(0x04)  /* gpio  67-43  */
 118#define QSD8X50_GPIO_OUT_3      MSM_GPIO1_SHADOW_REG(0x08)  /* gpio  94-68  */
 119#define QSD8X50_GPIO_OUT_4      MSM_GPIO1_SHADOW_REG(0x0C)  /* gpio 103-95  */
 120#define QSD8X50_GPIO_OUT_5      MSM_GPIO1_SHADOW_REG(0x10)  /* gpio 121-104 */
 121#define QSD8X50_GPIO_OUT_6      MSM_GPIO1_SHADOW_REG(0x14)  /* gpio 152-122 */
 122#define QSD8X50_GPIO_OUT_7      MSM_GPIO1_SHADOW_REG(0x18)  /* gpio 164-153 */
 123
 124/* same pin map as above, output enable */
 125#define QSD8X50_GPIO_OE_0       MSM_GPIO1_SHADOW_REG(0x20)
 126#define QSD8X50_GPIO_OE_1       MSM_GPIO2_SHADOW_REG(0x08)
 127#define QSD8X50_GPIO_OE_2       MSM_GPIO1_SHADOW_REG(0x24)
 128#define QSD8X50_GPIO_OE_3       MSM_GPIO1_SHADOW_REG(0x28)
 129#define QSD8X50_GPIO_OE_4       MSM_GPIO1_SHADOW_REG(0x2C)
 130#define QSD8X50_GPIO_OE_5       MSM_GPIO1_SHADOW_REG(0x30)
 131#define QSD8X50_GPIO_OE_6       MSM_GPIO1_SHADOW_REG(0x34)
 132#define QSD8X50_GPIO_OE_7       MSM_GPIO1_SHADOW_REG(0x38)
 133
 134/* same pin map as above, input read */
 135#define QSD8X50_GPIO_IN_0       MSM_GPIO1_SHADOW_REG(0x50)
 136#define QSD8X50_GPIO_IN_1       MSM_GPIO2_SHADOW_REG(0x20)
 137#define QSD8X50_GPIO_IN_2       MSM_GPIO1_SHADOW_REG(0x54)
 138#define QSD8X50_GPIO_IN_3       MSM_GPIO1_SHADOW_REG(0x58)
 139#define QSD8X50_GPIO_IN_4       MSM_GPIO1_SHADOW_REG(0x5C)
 140#define QSD8X50_GPIO_IN_5       MSM_GPIO1_SHADOW_REG(0x60)
 141#define QSD8X50_GPIO_IN_6       MSM_GPIO1_SHADOW_REG(0x64)
 142#define QSD8X50_GPIO_IN_7       MSM_GPIO1_SHADOW_REG(0x68)
 143
 144/* same pin map as above, 1=edge 0=level interrup */
 145#define QSD8X50_GPIO_INT_EDGE_0 MSM_GPIO1_SHADOW_REG(0x70)
 146#define QSD8X50_GPIO_INT_EDGE_1 MSM_GPIO2_SHADOW_REG(0x50)
 147#define QSD8X50_GPIO_INT_EDGE_2 MSM_GPIO1_SHADOW_REG(0x74)
 148#define QSD8X50_GPIO_INT_EDGE_3 MSM_GPIO1_SHADOW_REG(0x78)
 149#define QSD8X50_GPIO_INT_EDGE_4 MSM_GPIO1_SHADOW_REG(0x7C)
 150#define QSD8X50_GPIO_INT_EDGE_5 MSM_GPIO1_SHADOW_REG(0x80)
 151#define QSD8X50_GPIO_INT_EDGE_6 MSM_GPIO1_SHADOW_REG(0x84)
 152#define QSD8X50_GPIO_INT_EDGE_7 MSM_GPIO1_SHADOW_REG(0x88)
 153
 154/* same pin map as above, 1=positive 0=negative */
 155#define QSD8X50_GPIO_INT_POS_0  MSM_GPIO1_SHADOW_REG(0x90)
 156#define QSD8X50_GPIO_INT_POS_1  MSM_GPIO2_SHADOW_REG(0x58)
 157#define QSD8X50_GPIO_INT_POS_2  MSM_GPIO1_SHADOW_REG(0x94)
 158#define QSD8X50_GPIO_INT_POS_3  MSM_GPIO1_SHADOW_REG(0x98)
 159#define QSD8X50_GPIO_INT_POS_4  MSM_GPIO1_SHADOW_REG(0x9C)
 160#define QSD8X50_GPIO_INT_POS_5  MSM_GPIO1_SHADOW_REG(0xA0)
 161#define QSD8X50_GPIO_INT_POS_6  MSM_GPIO1_SHADOW_REG(0xA4)
 162#define QSD8X50_GPIO_INT_POS_7  MSM_GPIO1_SHADOW_REG(0xA8)
 163
 164/* same pin map as above, interrupt enable */
 165#define QSD8X50_GPIO_INT_EN_0   MSM_GPIO1_SHADOW_REG(0xB0)
 166#define QSD8X50_GPIO_INT_EN_1   MSM_GPIO2_SHADOW_REG(0x60)
 167#define QSD8X50_GPIO_INT_EN_2   MSM_GPIO1_SHADOW_REG(0xB4)
 168#define QSD8X50_GPIO_INT_EN_3   MSM_GPIO1_SHADOW_REG(0xB8)
 169#define QSD8X50_GPIO_INT_EN_4   MSM_GPIO1_SHADOW_REG(0xBC)
 170#define QSD8X50_GPIO_INT_EN_5   MSM_GPIO1_SHADOW_REG(0xC0)
 171#define QSD8X50_GPIO_INT_EN_6   MSM_GPIO1_SHADOW_REG(0xC4)
 172#define QSD8X50_GPIO_INT_EN_7   MSM_GPIO1_SHADOW_REG(0xC8)
 173
 174/* same pin map as above, write 1 to clear interrupt */
 175#define QSD8X50_GPIO_INT_CLEAR_0        MSM_GPIO1_SHADOW_REG(0xD0)
 176#define QSD8X50_GPIO_INT_CLEAR_1        MSM_GPIO2_SHADOW_REG(0x68)
 177#define QSD8X50_GPIO_INT_CLEAR_2        MSM_GPIO1_SHADOW_REG(0xD4)
 178#define QSD8X50_GPIO_INT_CLEAR_3        MSM_GPIO1_SHADOW_REG(0xD8)
 179#define QSD8X50_GPIO_INT_CLEAR_4        MSM_GPIO1_SHADOW_REG(0xDC)
 180#define QSD8X50_GPIO_INT_CLEAR_5        MSM_GPIO1_SHADOW_REG(0xE0)
 181#define QSD8X50_GPIO_INT_CLEAR_6        MSM_GPIO1_SHADOW_REG(0xE4)
 182#define QSD8X50_GPIO_INT_CLEAR_7        MSM_GPIO1_SHADOW_REG(0xE8)
 183
 184/* same pin map as above, 1=interrupt pending */
 185#define QSD8X50_GPIO_INT_STATUS_0       MSM_GPIO1_SHADOW_REG(0xF0)
 186#define QSD8X50_GPIO_INT_STATUS_1       MSM_GPIO2_SHADOW_REG(0x70)
 187#define QSD8X50_GPIO_INT_STATUS_2       MSM_GPIO1_SHADOW_REG(0xF4)
 188#define QSD8X50_GPIO_INT_STATUS_3       MSM_GPIO1_SHADOW_REG(0xF8)
 189#define QSD8X50_GPIO_INT_STATUS_4       MSM_GPIO1_SHADOW_REG(0xFC)
 190#define QSD8X50_GPIO_INT_STATUS_5       MSM_GPIO1_SHADOW_REG(0x100)
 191#define QSD8X50_GPIO_INT_STATUS_6       MSM_GPIO1_SHADOW_REG(0x104)
 192#define QSD8X50_GPIO_INT_STATUS_7       MSM_GPIO1_SHADOW_REG(0x108)
 193
 194/*
 195 * MSM7X30 registers
 196 */
 197/* output value */
 198#define MSM7X30_GPIO_OUT_0      MSM_GPIO1_REG(0x00)   /* gpio  15-0   */
 199#define MSM7X30_GPIO_OUT_1      MSM_GPIO2_REG(0x00)   /* gpio  43-16  */
 200#define MSM7X30_GPIO_OUT_2      MSM_GPIO1_REG(0x04)   /* gpio  67-44  */
 201#define MSM7X30_GPIO_OUT_3      MSM_GPIO1_REG(0x08)   /* gpio  94-68  */
 202#define MSM7X30_GPIO_OUT_4      MSM_GPIO1_REG(0x0C)   /* gpio 106-95  */
 203#define MSM7X30_GPIO_OUT_5      MSM_GPIO1_REG(0x50)   /* gpio 133-107 */
 204#define MSM7X30_GPIO_OUT_6      MSM_GPIO1_REG(0xC4)   /* gpio 150-134 */
 205#define MSM7X30_GPIO_OUT_7      MSM_GPIO1_REG(0x214)  /* gpio 181-151 */
 206
 207/* same pin map as above, output enable */
 208#define MSM7X30_GPIO_OE_0       MSM_GPIO1_REG(0x10)
 209#define MSM7X30_GPIO_OE_1       MSM_GPIO2_REG(0x08)
 210#define MSM7X30_GPIO_OE_2       MSM_GPIO1_REG(0x14)
 211#define MSM7X30_GPIO_OE_3       MSM_GPIO1_REG(0x18)
 212#define MSM7X30_GPIO_OE_4       MSM_GPIO1_REG(0x1C)
 213#define MSM7X30_GPIO_OE_5       MSM_GPIO1_REG(0x54)
 214#define MSM7X30_GPIO_OE_6       MSM_GPIO1_REG(0xC8)
 215#define MSM7X30_GPIO_OE_7       MSM_GPIO1_REG(0x218)
 216
 217/* same pin map as above, input read */
 218#define MSM7X30_GPIO_IN_0       MSM_GPIO1_REG(0x34)
 219#define MSM7X30_GPIO_IN_1       MSM_GPIO2_REG(0x20)
 220#define MSM7X30_GPIO_IN_2       MSM_GPIO1_REG(0x38)
 221#define MSM7X30_GPIO_IN_3       MSM_GPIO1_REG(0x3C)
 222#define MSM7X30_GPIO_IN_4       MSM_GPIO1_REG(0x40)
 223#define MSM7X30_GPIO_IN_5       MSM_GPIO1_REG(0x44)
 224#define MSM7X30_GPIO_IN_6       MSM_GPIO1_REG(0xCC)
 225#define MSM7X30_GPIO_IN_7       MSM_GPIO1_REG(0x21C)
 226
 227/* same pin map as above, 1=edge 0=level interrup */
 228#define MSM7X30_GPIO_INT_EDGE_0 MSM_GPIO1_REG(0x60)
 229#define MSM7X30_GPIO_INT_EDGE_1 MSM_GPIO2_REG(0x50)
 230#define MSM7X30_GPIO_INT_EDGE_2 MSM_GPIO1_REG(0x64)
 231#define MSM7X30_GPIO_INT_EDGE_3 MSM_GPIO1_REG(0x68)
 232#define MSM7X30_GPIO_INT_EDGE_4 MSM_GPIO1_REG(0x6C)
 233#define MSM7X30_GPIO_INT_EDGE_5 MSM_GPIO1_REG(0xC0)
 234#define MSM7X30_GPIO_INT_EDGE_6 MSM_GPIO1_REG(0xD0)
 235#define MSM7X30_GPIO_INT_EDGE_7 MSM_GPIO1_REG(0x240)
 236
 237/* same pin map as above, 1=positive 0=negative */
 238#define MSM7X30_GPIO_INT_POS_0  MSM_GPIO1_REG(0x70)
 239#define MSM7X30_GPIO_INT_POS_1  MSM_GPIO2_REG(0x58)
 240#define MSM7X30_GPIO_INT_POS_2  MSM_GPIO1_REG(0x74)
 241#define MSM7X30_GPIO_INT_POS_3  MSM_GPIO1_REG(0x78)
 242#define MSM7X30_GPIO_INT_POS_4  MSM_GPIO1_REG(0x7C)
 243#define MSM7X30_GPIO_INT_POS_5  MSM_GPIO1_REG(0xBC)
 244#define MSM7X30_GPIO_INT_POS_6  MSM_GPIO1_REG(0xD4)
 245#define MSM7X30_GPIO_INT_POS_7  MSM_GPIO1_REG(0x228)
 246
 247/* same pin map as above, interrupt enable */
 248#define MSM7X30_GPIO_INT_EN_0   MSM_GPIO1_REG(0x80)
 249#define MSM7X30_GPIO_INT_EN_1   MSM_GPIO2_REG(0x60)
 250#define MSM7X30_GPIO_INT_EN_2   MSM_GPIO1_REG(0x84)
 251#define MSM7X30_GPIO_INT_EN_3   MSM_GPIO1_REG(0x88)
 252#define MSM7X30_GPIO_INT_EN_4   MSM_GPIO1_REG(0x8C)
 253#define MSM7X30_GPIO_INT_EN_5   MSM_GPIO1_REG(0xB8)
 254#define MSM7X30_GPIO_INT_EN_6   MSM_GPIO1_REG(0xD8)
 255#define MSM7X30_GPIO_INT_EN_7   MSM_GPIO1_REG(0x22C)
 256
 257/* same pin map as above, write 1 to clear interrupt */
 258#define MSM7X30_GPIO_INT_CLEAR_0        MSM_GPIO1_REG(0x90)
 259#define MSM7X30_GPIO_INT_CLEAR_1        MSM_GPIO2_REG(0x68)
 260#define MSM7X30_GPIO_INT_CLEAR_2        MSM_GPIO1_REG(0x94)
 261#define MSM7X30_GPIO_INT_CLEAR_3        MSM_GPIO1_REG(0x98)
 262#define MSM7X30_GPIO_INT_CLEAR_4        MSM_GPIO1_REG(0x9C)
 263#define MSM7X30_GPIO_INT_CLEAR_5        MSM_GPIO1_REG(0xB4)
 264#define MSM7X30_GPIO_INT_CLEAR_6        MSM_GPIO1_REG(0xDC)
 265#define MSM7X30_GPIO_INT_CLEAR_7        MSM_GPIO1_REG(0x230)
 266
 267/* same pin map as above, 1=interrupt pending */
 268#define MSM7X30_GPIO_INT_STATUS_0       MSM_GPIO1_REG(0xA0)
 269#define MSM7X30_GPIO_INT_STATUS_1       MSM_GPIO2_REG(0x70)
 270#define MSM7X30_GPIO_INT_STATUS_2       MSM_GPIO1_REG(0xA4)
 271#define MSM7X30_GPIO_INT_STATUS_3       MSM_GPIO1_REG(0xA8)
 272#define MSM7X30_GPIO_INT_STATUS_4       MSM_GPIO1_REG(0xAC)
 273#define MSM7X30_GPIO_INT_STATUS_5       MSM_GPIO1_REG(0xB0)
 274#define MSM7X30_GPIO_INT_STATUS_6       MSM_GPIO1_REG(0xE0)
 275#define MSM7X30_GPIO_INT_STATUS_7       MSM_GPIO1_REG(0x234)
 276
 277#define FIRST_GPIO_IRQ MSM_GPIO_TO_INT(0)
 278
 279#define MSM_GPIO_BANK(soc, bank, first, last)                           \
 280        {                                                               \
 281                .regs[MSM_GPIO_OUT] =         soc##_GPIO_OUT_##bank,    \
 282                .regs[MSM_GPIO_IN] =          soc##_GPIO_IN_##bank,     \
 283                .regs[MSM_GPIO_INT_STATUS] =  soc##_GPIO_INT_STATUS_##bank, \
 284                .regs[MSM_GPIO_INT_CLEAR] =   soc##_GPIO_INT_CLEAR_##bank, \
 285                .regs[MSM_GPIO_INT_EN] =      soc##_GPIO_INT_EN_##bank, \
 286                .regs[MSM_GPIO_INT_EDGE] =    soc##_GPIO_INT_EDGE_##bank, \
 287                .regs[MSM_GPIO_INT_POS] =     soc##_GPIO_INT_POS_##bank, \
 288                .regs[MSM_GPIO_OE] =          soc##_GPIO_OE_##bank,     \
 289                .chip = {                                               \
 290                        .base = (first),                                \
 291                        .ngpio = (last) - (first) + 1,                  \
 292                        .get = msm_gpio_get,                            \
 293                        .set = msm_gpio_set,                            \
 294                        .direction_input = msm_gpio_direction_input,    \
 295                        .direction_output = msm_gpio_direction_output,  \
 296                        .to_irq = msm_gpio_to_irq,                      \
 297                        .request = msm_gpio_request,                    \
 298                        .free = msm_gpio_free,                          \
 299                }                                                       \
 300        }
 301
 302#define MSM_GPIO_BROKEN_INT_CLEAR 1
 303
 304enum msm_gpio_reg {
 305        MSM_GPIO_IN,
 306        MSM_GPIO_OUT,
 307        MSM_GPIO_INT_STATUS,
 308        MSM_GPIO_INT_CLEAR,
 309        MSM_GPIO_INT_EN,
 310        MSM_GPIO_INT_EDGE,
 311        MSM_GPIO_INT_POS,
 312        MSM_GPIO_OE,
 313        MSM_GPIO_REG_NR
 314};
 315
 316struct msm_gpio_chip {
 317        spinlock_t              lock;
 318        struct gpio_chip        chip;
 319        unsigned long           regs[MSM_GPIO_REG_NR];
 320#if MSM_GPIO_BROKEN_INT_CLEAR
 321        unsigned                int_status_copy;
 322#endif
 323        unsigned int            both_edge_detect;
 324        unsigned int            int_enable[2]; /* 0: awake, 1: sleep */
 325        void __iomem            *base;
 326};
 327
 328struct msm_gpio_initdata {
 329        struct msm_gpio_chip *chips;
 330        int count;
 331};
 332
 333static void msm_gpio_writel(struct msm_gpio_chip *chip, u32 val,
 334                            enum msm_gpio_reg reg)
 335{
 336        writel(val, chip->base + chip->regs[reg]);
 337}
 338
 339static u32 msm_gpio_readl(struct msm_gpio_chip *chip, enum msm_gpio_reg reg)
 340{
 341        return readl(chip->base + chip->regs[reg]);
 342}
 343
 344static int msm_gpio_write(struct msm_gpio_chip *msm_chip,
 345                          unsigned offset, unsigned on)
 346{
 347        unsigned mask = BIT(offset);
 348        unsigned val;
 349
 350        val = msm_gpio_readl(msm_chip, MSM_GPIO_OUT);
 351        if (on)
 352                msm_gpio_writel(msm_chip, val | mask, MSM_GPIO_OUT);
 353        else
 354                msm_gpio_writel(msm_chip, val & ~mask, MSM_GPIO_OUT);
 355        return 0;
 356}
 357
 358static void msm_gpio_update_both_edge_detect(struct msm_gpio_chip *msm_chip)
 359{
 360        int loop_limit = 100;
 361        unsigned pol, val, val2, intstat;
 362        do {
 363                val = msm_gpio_readl(msm_chip, MSM_GPIO_IN);
 364                pol = msm_gpio_readl(msm_chip, MSM_GPIO_INT_POS);
 365                pol = (pol & ~msm_chip->both_edge_detect) |
 366                      (~val & msm_chip->both_edge_detect);
 367                msm_gpio_writel(msm_chip, pol, MSM_GPIO_INT_POS);
 368                intstat = msm_gpio_readl(msm_chip, MSM_GPIO_INT_STATUS);
 369                val2 = msm_gpio_readl(msm_chip, MSM_GPIO_IN);
 370                if (((val ^ val2) & msm_chip->both_edge_detect & ~intstat) == 0)
 371                        return;
 372        } while (loop_limit-- > 0);
 373        printk(KERN_ERR "msm_gpio_update_both_edge_detect, "
 374               "failed to reach stable state %x != %x\n", val, val2);
 375}
 376
 377static int msm_gpio_clear_detect_status(struct msm_gpio_chip *msm_chip,
 378                                        unsigned offset)
 379{
 380        unsigned bit = BIT(offset);
 381
 382#if MSM_GPIO_BROKEN_INT_CLEAR
 383        /* Save interrupts that already triggered before we loose them. */
 384        /* Any interrupt that triggers between the read of int_status */
 385        /* and the write to int_clear will still be lost though. */
 386        msm_chip->int_status_copy |=
 387                msm_gpio_readl(msm_chip, MSM_GPIO_INT_STATUS);
 388        msm_chip->int_status_copy &= ~bit;
 389#endif
 390        msm_gpio_writel(msm_chip, bit, MSM_GPIO_INT_CLEAR);
 391        msm_gpio_update_both_edge_detect(msm_chip);
 392        return 0;
 393}
 394
 395static int msm_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
 396{
 397        struct msm_gpio_chip *msm_chip;
 398        unsigned long irq_flags;
 399        u32 val;
 400
 401        msm_chip = container_of(chip, struct msm_gpio_chip, chip);
 402        spin_lock_irqsave(&msm_chip->lock, irq_flags);
 403        val = msm_gpio_readl(msm_chip, MSM_GPIO_OE) & ~BIT(offset);
 404        msm_gpio_writel(msm_chip, val, MSM_GPIO_OE);
 405        spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
 406        return 0;
 407}
 408
 409static int
 410msm_gpio_direction_output(struct gpio_chip *chip, unsigned offset, int value)
 411{
 412        struct msm_gpio_chip *msm_chip;
 413        unsigned long irq_flags;
 414        u32 val;
 415
 416        msm_chip = container_of(chip, struct msm_gpio_chip, chip);
 417        spin_lock_irqsave(&msm_chip->lock, irq_flags);
 418        msm_gpio_write(msm_chip, offset, value);
 419        val = msm_gpio_readl(msm_chip, MSM_GPIO_OE) | BIT(offset);
 420        msm_gpio_writel(msm_chip, val, MSM_GPIO_OE);
 421        spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
 422        return 0;
 423}
 424
 425static int msm_gpio_get(struct gpio_chip *chip, unsigned offset)
 426{
 427        struct msm_gpio_chip *msm_chip;
 428
 429        msm_chip = container_of(chip, struct msm_gpio_chip, chip);
 430        return (msm_gpio_readl(msm_chip, MSM_GPIO_IN) & (1U << offset)) ? 1 : 0;
 431}
 432
 433static void msm_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 434{
 435        struct msm_gpio_chip *msm_chip;
 436        unsigned long irq_flags;
 437
 438        msm_chip = container_of(chip, struct msm_gpio_chip, chip);
 439        spin_lock_irqsave(&msm_chip->lock, irq_flags);
 440        msm_gpio_write(msm_chip, offset, value);
 441        spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
 442}
 443
 444static int msm_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
 445{
 446        return MSM_GPIO_TO_INT(chip->base + offset);
 447}
 448
 449#ifdef CONFIG_MSM_GPIOMUX
 450static int msm_gpio_request(struct gpio_chip *chip, unsigned offset)
 451{
 452        return msm_gpiomux_get(chip->base + offset);
 453}
 454
 455static void msm_gpio_free(struct gpio_chip *chip, unsigned offset)
 456{
 457        msm_gpiomux_put(chip->base + offset);
 458}
 459#else
 460#define msm_gpio_request NULL
 461#define msm_gpio_free NULL
 462#endif
 463
 464static struct msm_gpio_chip *msm_gpio_chips;
 465static int msm_gpio_count;
 466
 467static struct msm_gpio_chip msm_gpio_chips_msm7x01[] = {
 468        MSM_GPIO_BANK(MSM7X00, 0,   0,  15),
 469        MSM_GPIO_BANK(MSM7X00, 1,  16,  42),
 470        MSM_GPIO_BANK(MSM7X00, 2,  43,  67),
 471        MSM_GPIO_BANK(MSM7X00, 3,  68,  94),
 472        MSM_GPIO_BANK(MSM7X00, 4,  95, 106),
 473        MSM_GPIO_BANK(MSM7X00, 5, 107, 121),
 474};
 475
 476static struct msm_gpio_initdata msm_gpio_7x01_init = {
 477        .chips = msm_gpio_chips_msm7x01,
 478        .count = ARRAY_SIZE(msm_gpio_chips_msm7x01),
 479};
 480
 481static struct msm_gpio_chip msm_gpio_chips_msm7x30[] = {
 482        MSM_GPIO_BANK(MSM7X30, 0,   0,  15),
 483        MSM_GPIO_BANK(MSM7X30, 1,  16,  43),
 484        MSM_GPIO_BANK(MSM7X30, 2,  44,  67),
 485        MSM_GPIO_BANK(MSM7X30, 3,  68,  94),
 486        MSM_GPIO_BANK(MSM7X30, 4,  95, 106),
 487        MSM_GPIO_BANK(MSM7X30, 5, 107, 133),
 488        MSM_GPIO_BANK(MSM7X30, 6, 134, 150),
 489        MSM_GPIO_BANK(MSM7X30, 7, 151, 181),
 490};
 491
 492static struct msm_gpio_initdata msm_gpio_7x30_init = {
 493        .chips = msm_gpio_chips_msm7x30,
 494        .count = ARRAY_SIZE(msm_gpio_chips_msm7x30),
 495};
 496
 497static struct msm_gpio_chip msm_gpio_chips_qsd8x50[] = {
 498        MSM_GPIO_BANK(QSD8X50, 0,   0,  15),
 499        MSM_GPIO_BANK(QSD8X50, 1,  16,  42),
 500        MSM_GPIO_BANK(QSD8X50, 2,  43,  67),
 501        MSM_GPIO_BANK(QSD8X50, 3,  68,  94),
 502        MSM_GPIO_BANK(QSD8X50, 4,  95, 103),
 503        MSM_GPIO_BANK(QSD8X50, 5, 104, 121),
 504        MSM_GPIO_BANK(QSD8X50, 6, 122, 152),
 505        MSM_GPIO_BANK(QSD8X50, 7, 153, 164),
 506};
 507
 508static struct msm_gpio_initdata msm_gpio_8x50_init = {
 509        .chips = msm_gpio_chips_qsd8x50,
 510        .count = ARRAY_SIZE(msm_gpio_chips_qsd8x50),
 511};
 512
 513static void msm_gpio_irq_ack(struct irq_data *d)
 514{
 515        unsigned long irq_flags;
 516        struct msm_gpio_chip *msm_chip = irq_data_get_irq_chip_data(d);
 517        spin_lock_irqsave(&msm_chip->lock, irq_flags);
 518        msm_gpio_clear_detect_status(msm_chip,
 519                                     d->irq - gpio_to_irq(msm_chip->chip.base));
 520        spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
 521}
 522
 523static void msm_gpio_irq_mask(struct irq_data *d)
 524{
 525        unsigned long irq_flags;
 526        struct msm_gpio_chip *msm_chip = irq_data_get_irq_chip_data(d);
 527        unsigned offset = d->irq - gpio_to_irq(msm_chip->chip.base);
 528
 529        spin_lock_irqsave(&msm_chip->lock, irq_flags);
 530        /* level triggered interrupts are also latched */
 531        if (!(msm_gpio_readl(msm_chip, MSM_GPIO_INT_EDGE) & BIT(offset)))
 532                msm_gpio_clear_detect_status(msm_chip, offset);
 533        msm_chip->int_enable[0] &= ~BIT(offset);
 534        msm_gpio_writel(msm_chip, msm_chip->int_enable[0], MSM_GPIO_INT_EN);
 535        spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
 536}
 537
 538static void msm_gpio_irq_unmask(struct irq_data *d)
 539{
 540        unsigned long irq_flags;
 541        struct msm_gpio_chip *msm_chip = irq_data_get_irq_chip_data(d);
 542        unsigned offset = d->irq - gpio_to_irq(msm_chip->chip.base);
 543
 544        spin_lock_irqsave(&msm_chip->lock, irq_flags);
 545        /* level triggered interrupts are also latched */
 546        if (!(msm_gpio_readl(msm_chip, MSM_GPIO_INT_EDGE) & BIT(offset)))
 547                msm_gpio_clear_detect_status(msm_chip, offset);
 548        msm_chip->int_enable[0] |= BIT(offset);
 549        msm_gpio_writel(msm_chip, msm_chip->int_enable[0], MSM_GPIO_INT_EN);
 550        spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
 551}
 552
 553static int msm_gpio_irq_set_wake(struct irq_data *d, unsigned int on)
 554{
 555        unsigned long irq_flags;
 556        struct msm_gpio_chip *msm_chip = irq_data_get_irq_chip_data(d);
 557        unsigned offset = d->irq - gpio_to_irq(msm_chip->chip.base);
 558
 559        spin_lock_irqsave(&msm_chip->lock, irq_flags);
 560
 561        if (on)
 562                msm_chip->int_enable[1] |= BIT(offset);
 563        else
 564                msm_chip->int_enable[1] &= ~BIT(offset);
 565
 566        spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
 567        return 0;
 568}
 569
 570static int msm_gpio_irq_set_type(struct irq_data *d, unsigned int flow_type)
 571{
 572        unsigned long irq_flags;
 573        struct msm_gpio_chip *msm_chip = irq_data_get_irq_chip_data(d);
 574        unsigned offset = d->irq - gpio_to_irq(msm_chip->chip.base);
 575        unsigned val, mask = BIT(offset);
 576
 577        spin_lock_irqsave(&msm_chip->lock, irq_flags);
 578        val = msm_gpio_readl(msm_chip, MSM_GPIO_INT_EDGE);
 579        if (flow_type & IRQ_TYPE_EDGE_BOTH) {
 580                msm_gpio_writel(msm_chip, val | mask, MSM_GPIO_INT_EDGE);
 581                __irq_set_handler_locked(d->irq, handle_edge_irq);
 582        } else {
 583                msm_gpio_writel(msm_chip, val & ~mask, MSM_GPIO_INT_EDGE);
 584                __irq_set_handler_locked(d->irq, handle_level_irq);
 585        }
 586        if ((flow_type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) {
 587                msm_chip->both_edge_detect |= mask;
 588                msm_gpio_update_both_edge_detect(msm_chip);
 589        } else {
 590                msm_chip->both_edge_detect &= ~mask;
 591                val = msm_gpio_readl(msm_chip, MSM_GPIO_INT_POS);
 592                if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_HIGH))
 593                        val |= mask;
 594                else
 595                        val &= ~mask;
 596                msm_gpio_writel(msm_chip, val, MSM_GPIO_INT_POS);
 597        }
 598        spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
 599        return 0;
 600}
 601
 602static void msm_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
 603{
 604        int i, j, mask;
 605        unsigned val;
 606
 607        for (i = 0; i < msm_gpio_count; i++) {
 608                struct msm_gpio_chip *msm_chip = &msm_gpio_chips[i];
 609                val = msm_gpio_readl(msm_chip, MSM_GPIO_INT_STATUS);
 610                val &= msm_chip->int_enable[0];
 611                while (val) {
 612                        mask = val & -val;
 613                        j = fls(mask) - 1;
 614                        /* printk("%s %08x %08x bit %d gpio %d irq %d\n",
 615                                __func__, v, m, j, msm_chip->chip.start + j,
 616                                FIRST_GPIO_IRQ + msm_chip->chip.start + j); */
 617                        val &= ~mask;
 618                        generic_handle_irq(FIRST_GPIO_IRQ +
 619                                           msm_chip->chip.base + j);
 620                }
 621        }
 622        desc->irq_data.chip->irq_ack(&desc->irq_data);
 623}
 624
 625static struct irq_chip msm_gpio_irq_chip = {
 626        .name          = "msmgpio",
 627        .irq_ack       = msm_gpio_irq_ack,
 628        .irq_mask      = msm_gpio_irq_mask,
 629        .irq_unmask    = msm_gpio_irq_unmask,
 630        .irq_set_wake  = msm_gpio_irq_set_wake,
 631        .irq_set_type  = msm_gpio_irq_set_type,
 632};
 633
 634static int gpio_msm_v1_probe(struct platform_device *pdev)
 635{
 636        int i, j = 0;
 637        const struct platform_device_id *dev_id = platform_get_device_id(pdev);
 638        struct msm_gpio_initdata *data;
 639        int irq1, irq2;
 640        struct resource *res;
 641        void __iomem *base1, __iomem *base2;
 642
 643        data = (struct msm_gpio_initdata *)dev_id->driver_data;
 644        msm_gpio_chips = data->chips;
 645        msm_gpio_count = data->count;
 646
 647        irq1 = platform_get_irq(pdev, 0);
 648        if (irq1 < 0)
 649                return irq1;
 650
 651        irq2 = platform_get_irq(pdev, 1);
 652        if (irq2 < 0)
 653                return irq2;
 654
 655        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 656        base1 = devm_ioremap_resource(&pdev->dev, res);
 657        if (IS_ERR(base1))
 658                return PTR_ERR(base1);
 659
 660        res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 661        base2 = devm_ioremap_resource(&pdev->dev, res);
 662        if (IS_ERR(base2))
 663                return PTR_ERR(base2);
 664
 665        for (i = FIRST_GPIO_IRQ; i < FIRST_GPIO_IRQ + NR_GPIO_IRQS; i++) {
 666                if (i - FIRST_GPIO_IRQ >=
 667                        msm_gpio_chips[j].chip.base +
 668                        msm_gpio_chips[j].chip.ngpio)
 669                        j++;
 670                irq_set_chip_data(i, &msm_gpio_chips[j]);
 671                irq_set_chip_and_handler(i, &msm_gpio_irq_chip,
 672                                         handle_edge_irq);
 673                set_irq_flags(i, IRQF_VALID);
 674        }
 675
 676        for (i = 0; i < msm_gpio_count; i++) {
 677                if (i == 1)
 678                        msm_gpio_chips[i].base = base2;
 679                else
 680                        msm_gpio_chips[i].base = base1;
 681                spin_lock_init(&msm_gpio_chips[i].lock);
 682                msm_gpio_writel(&msm_gpio_chips[i], 0, MSM_GPIO_INT_EN);
 683                gpiochip_add(&msm_gpio_chips[i].chip);
 684        }
 685
 686        irq_set_chained_handler(irq1, msm_gpio_irq_handler);
 687        irq_set_chained_handler(irq2, msm_gpio_irq_handler);
 688        irq_set_irq_wake(irq1, 1);
 689        irq_set_irq_wake(irq2, 2);
 690        return 0;
 691}
 692
 693static struct platform_device_id gpio_msm_v1_device_ids[] = {
 694        { "gpio-msm-7201", (unsigned long)&msm_gpio_7x01_init },
 695        { "gpio-msm-7x30", (unsigned long)&msm_gpio_7x30_init },
 696        { "gpio-msm-8x50", (unsigned long)&msm_gpio_8x50_init },
 697        { }
 698};
 699MODULE_DEVICE_TABLE(platform, gpio_msm_v1_device_ids);
 700
 701static struct platform_driver gpio_msm_v1_driver = {
 702        .driver = {
 703                .name = "gpio-msm-v1",
 704                .owner = THIS_MODULE,
 705        },
 706        .probe = gpio_msm_v1_probe,
 707        .id_table = gpio_msm_v1_device_ids,
 708};
 709
 710static int __init gpio_msm_v1_init(void)
 711{
 712        return platform_driver_register(&gpio_msm_v1_driver);
 713}
 714postcore_initcall(gpio_msm_v1_init);
 715MODULE_LICENSE("GPL v2");
 716
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