drivers/mfd/db8500-prcmu.c

   1 /*
   2  * Copyright (C) STMicroelectronics 2009
   3  * Copyright (C) ST-Ericsson SA 2010
   4  *
   5  * License Terms: GNU General Public License v2
   6  * Author: Kumar Sanghvi <kumar.sanghvi@stericsson.com>
   7  * Author: Sundar Iyer <sundar.iyer@stericsson.com>
   8  * Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com>
   9  *
  10  * U8500 PRCM Unit interface driver
  11  *
  12  */
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/delay.h>
  16 #include <linux/errno.h>
  17 #include <linux/err.h>
  18 #include <linux/spinlock.h>
  19 #include <linux/io.h>
  20 #include <linux/slab.h>
  21 #include <linux/mutex.h>
  22 #include <linux/completion.h>
  23 #include <linux/irq.h>
  24 #include <linux/jiffies.h>
  25 #include <linux/bitops.h>
  26 #include <linux/fs.h>
  27 #include <linux/platform_device.h>
  28 #include <linux/uaccess.h>
  29 #include <linux/mfd/core.h>
  30 #include <linux/mfd/dbx500-prcmu.h>
  31 #include <linux/regulator/db8500-prcmu.h>
  32 #include <linux/regulator/machine.h>
  33 #include <mach/hardware.h>
  34 #include <mach/irqs.h>
  35 #include <mach/db8500-regs.h>
  36 #include <mach/id.h>
  37 #include "dbx500-prcmu-regs.h"
  38
  39 /* Offset for the firmware version within the TCPM */
  40 #define PRCMU_FW_VERSION_OFFSET 0xA4
  41
  42 /* PRCMU project numbers, defined by PRCMU FW */
  43 #define PRCMU_PROJECT_ID_8500V1_0 1
  44 #define PRCMU_PROJECT_ID_8500V2_0 2
  45 #define PRCMU_PROJECT_ID_8400V2_0 3
  46
  47 /* Index of different voltages to be used when accessing AVSData */
  48 #define PRCM_AVS_BASE           0x2FC
  49 #define PRCM_AVS_VBB_RET        (PRCM_AVS_BASE + 0x0)
  50 #define PRCM_AVS_VBB_MAX_OPP    (PRCM_AVS_BASE + 0x1)
  51 #define PRCM_AVS_VBB_100_OPP    (PRCM_AVS_BASE + 0x2)
  52 #define PRCM_AVS_VBB_50_OPP     (PRCM_AVS_BASE + 0x3)
  53 #define PRCM_AVS_VARM_MAX_OPP   (PRCM_AVS_BASE + 0x4)
  54 #define PRCM_AVS_VARM_100_OPP   (PRCM_AVS_BASE + 0x5)
  55 #define PRCM_AVS_VARM_50_OPP    (PRCM_AVS_BASE + 0x6)
  56 #define PRCM_AVS_VARM_RET       (PRCM_AVS_BASE + 0x7)
  57 #define PRCM_AVS_VAPE_100_OPP   (PRCM_AVS_BASE + 0x8)
  58 #define PRCM_AVS_VAPE_50_OPP    (PRCM_AVS_BASE + 0x9)
  59 #define PRCM_AVS_VMOD_100_OPP   (PRCM_AVS_BASE + 0xA)
  60 #define PRCM_AVS_VMOD_50_OPP    (PRCM_AVS_BASE + 0xB)
  61 #define PRCM_AVS_VSAFE          (PRCM_AVS_BASE + 0xC)
  62
  63 #define PRCM_AVS_VOLTAGE                0
  64 #define PRCM_AVS_VOLTAGE_MASK           0x3f
  65 #define PRCM_AVS_ISSLOWSTARTUP          6
  66 #define PRCM_AVS_ISSLOWSTARTUP_MASK     (1 << PRCM_AVS_ISSLOWSTARTUP)
  67 #define PRCM_AVS_ISMODEENABLE           7
  68 #define PRCM_AVS_ISMODEENABLE_MASK      (1 << PRCM_AVS_ISMODEENABLE)
  69
  70 #define PRCM_BOOT_STATUS        0xFFF
  71 #define PRCM_ROMCODE_A2P        0xFFE
  72 #define PRCM_ROMCODE_P2A        0xFFD
  73 #define PRCM_XP70_CUR_PWR_STATE 0xFFC      /* 4 BYTES */
  74
  75 #define PRCM_SW_RST_REASON 0xFF8 /* 2 bytes */
  76
  77 #define _PRCM_MBOX_HEADER               0xFE8 /* 16 bytes */
  78 #define PRCM_MBOX_HEADER_REQ_MB0        (_PRCM_MBOX_HEADER + 0x0)
  79 #define PRCM_MBOX_HEADER_REQ_MB1        (_PRCM_MBOX_HEADER + 0x1)
  80 #define PRCM_MBOX_HEADER_REQ_MB2        (_PRCM_MBOX_HEADER + 0x2)
  81 #define PRCM_MBOX_HEADER_REQ_MB3        (_PRCM_MBOX_HEADER + 0x3)
  82 #define PRCM_MBOX_HEADER_REQ_MB4        (_PRCM_MBOX_HEADER + 0x4)
  83 #define PRCM_MBOX_HEADER_REQ_MB5        (_PRCM_MBOX_HEADER + 0x5)
  84 #define PRCM_MBOX_HEADER_ACK_MB0        (_PRCM_MBOX_HEADER + 0x8)
  85
  86 /* Req Mailboxes */
  87 #define PRCM_REQ_MB0 0xFDC /* 12 bytes  */
  88 #define PRCM_REQ_MB1 0xFD0 /* 12 bytes  */
  89 #define PRCM_REQ_MB2 0xFC0 /* 16 bytes  */
  90 #define PRCM_REQ_MB3 0xE4C /* 372 bytes  */
  91 #define PRCM_REQ_MB4 0xE48 /* 4 bytes  */
  92 #define PRCM_REQ_MB5 0xE44 /* 4 bytes  */
  93
  94 /* Ack Mailboxes */
  95 #define PRCM_ACK_MB0 0xE08 /* 52 bytes  */
  96 #define PRCM_ACK_MB1 0xE04 /* 4 bytes */
  97 #define PRCM_ACK_MB2 0xE00 /* 4 bytes */
  98 #define PRCM_ACK_MB3 0xDFC /* 4 bytes */
  99 #define PRCM_ACK_MB4 0xDF8 /* 4 bytes */
 100 #define PRCM_ACK_MB5 0xDF4 /* 4 bytes */
 101
 102 /* Mailbox 0 headers */
 103 #define MB0H_POWER_STATE_TRANS          0
 104 #define MB0H_CONFIG_WAKEUPS_EXE         1
 105 #define MB0H_READ_WAKEUP_ACK            3
 106 #define MB0H_CONFIG_WAKEUPS_SLEEP       4
 107
 108 #define MB0H_WAKEUP_EXE 2
 109 #define MB0H_WAKEUP_SLEEP 5
 110
 111 /* Mailbox 0 REQs */
 112 #define PRCM_REQ_MB0_AP_POWER_STATE     (PRCM_REQ_MB0 + 0x0)
 113 #define PRCM_REQ_MB0_AP_PLL_STATE       (PRCM_REQ_MB0 + 0x1)
 114 #define PRCM_REQ_MB0_ULP_CLOCK_STATE    (PRCM_REQ_MB0 + 0x2)
 115 #define PRCM_REQ_MB0_DO_NOT_WFI         (PRCM_REQ_MB0 + 0x3)
 116 #define PRCM_REQ_MB0_WAKEUP_8500        (PRCM_REQ_MB0 + 0x4)
 117 #define PRCM_REQ_MB0_WAKEUP_4500        (PRCM_REQ_MB0 + 0x8)
 118
 119 /* Mailbox 0 ACKs */
 120 #define PRCM_ACK_MB0_AP_PWRSTTR_STATUS  (PRCM_ACK_MB0 + 0x0)
 121 #define PRCM_ACK_MB0_READ_POINTER       (PRCM_ACK_MB0 + 0x1)
 122 #define PRCM_ACK_MB0_WAKEUP_0_8500      (PRCM_ACK_MB0 + 0x4)
 123 #define PRCM_ACK_MB0_WAKEUP_0_4500      (PRCM_ACK_MB0 + 0x8)
 124 #define PRCM_ACK_MB0_WAKEUP_1_8500      (PRCM_ACK_MB0 + 0x1C)
 125 #define PRCM_ACK_MB0_WAKEUP_1_4500      (PRCM_ACK_MB0 + 0x20)
 126 #define PRCM_ACK_MB0_EVENT_4500_NUMBERS 20
 127
 128 /* Mailbox 1 headers */
 129 #define MB1H_ARM_APE_OPP 0x0
 130 #define MB1H_RESET_MODEM 0x2
 131 #define MB1H_REQUEST_APE_OPP_100_VOLT 0x3
 132 #define MB1H_RELEASE_APE_OPP_100_VOLT 0x4
 133 #define MB1H_RELEASE_USB_WAKEUP 0x5
 134 #define MB1H_PLL_ON_OFF 0x6
 135
 136 /* Mailbox 1 Requests */
 137 #define PRCM_REQ_MB1_ARM_OPP                    (PRCM_REQ_MB1 + 0x0)
 138 #define PRCM_REQ_MB1_APE_OPP                    (PRCM_REQ_MB1 + 0x1)
 139 #define PRCM_REQ_MB1_PLL_ON_OFF                 (PRCM_REQ_MB1 + 0x4)
 140 #define PLL_SOC1_OFF    0x4
 141 #define PLL_SOC1_ON     0x8
 142
 143 /* Mailbox 1 ACKs */
 144 #define PRCM_ACK_MB1_CURRENT_ARM_OPP    (PRCM_ACK_MB1 + 0x0)
 145 #define PRCM_ACK_MB1_CURRENT_APE_OPP    (PRCM_ACK_MB1 + 0x1)
 146 #define PRCM_ACK_MB1_APE_VOLTAGE_STATUS (PRCM_ACK_MB1 + 0x2)
 147 #define PRCM_ACK_MB1_DVFS_STATUS        (PRCM_ACK_MB1 + 0x3)
 148
 149 /* Mailbox 2 headers */
 150 #define MB2H_DPS        0x0
 151 #define MB2H_AUTO_PWR   0x1
 152
 153 /* Mailbox 2 REQs */
 154 #define PRCM_REQ_MB2_SVA_MMDSP          (PRCM_REQ_MB2 + 0x0)
 155 #define PRCM_REQ_MB2_SVA_PIPE           (PRCM_REQ_MB2 + 0x1)
 156 #define PRCM_REQ_MB2_SIA_MMDSP          (PRCM_REQ_MB2 + 0x2)
 157 #define PRCM_REQ_MB2_SIA_PIPE           (PRCM_REQ_MB2 + 0x3)
 158 #define PRCM_REQ_MB2_SGA                (PRCM_REQ_MB2 + 0x4)
 159 #define PRCM_REQ_MB2_B2R2_MCDE          (PRCM_REQ_MB2 + 0x5)
 160 #define PRCM_REQ_MB2_ESRAM12            (PRCM_REQ_MB2 + 0x6)
 161 #define PRCM_REQ_MB2_ESRAM34            (PRCM_REQ_MB2 + 0x7)
 162 #define PRCM_REQ_MB2_AUTO_PM_SLEEP      (PRCM_REQ_MB2 + 0x8)
 163 #define PRCM_REQ_MB2_AUTO_PM_IDLE       (PRCM_REQ_MB2 + 0xC)
 164
 165 /* Mailbox 2 ACKs */
 166 #define PRCM_ACK_MB2_DPS_STATUS (PRCM_ACK_MB2 + 0x0)
 167 #define HWACC_PWR_ST_OK 0xFE
 168
 169 /* Mailbox 3 headers */
 170 #define MB3H_ANC        0x0
 171 #define MB3H_SIDETONE   0x1
 172 #define MB3H_SYSCLK     0xE
 173
 174 /* Mailbox 3 Requests */
 175 #define PRCM_REQ_MB3_ANC_FIR_COEFF      (PRCM_REQ_MB3 + 0x0)
 176 #define PRCM_REQ_MB3_ANC_IIR_COEFF      (PRCM_REQ_MB3 + 0x20)
 177 #define PRCM_REQ_MB3_ANC_SHIFTER        (PRCM_REQ_MB3 + 0x60)
 178 #define PRCM_REQ_MB3_ANC_WARP           (PRCM_REQ_MB3 + 0x64)
 179 #define PRCM_REQ_MB3_SIDETONE_FIR_GAIN  (PRCM_REQ_MB3 + 0x68)
 180 #define PRCM_REQ_MB3_SIDETONE_FIR_COEFF (PRCM_REQ_MB3 + 0x6C)
 181 #define PRCM_REQ_MB3_SYSCLK_MGT         (PRCM_REQ_MB3 + 0x16C)
 182
 183 /* Mailbox 4 headers */
 184 #define MB4H_DDR_INIT   0x0
 185 #define MB4H_MEM_ST     0x1
 186 #define MB4H_HOTDOG     0x12
 187 #define MB4H_HOTMON     0x13
 188 #define MB4H_HOT_PERIOD 0x14
 189 #define MB4H_A9WDOG_CONF 0x16
 190 #define MB4H_A9WDOG_EN   0x17
 191 #define MB4H_A9WDOG_DIS  0x18
 192 #define MB4H_A9WDOG_LOAD 0x19
 193 #define MB4H_A9WDOG_KICK 0x20
 194
 195 /* Mailbox 4 Requests */
 196 #define PRCM_REQ_MB4_DDR_ST_AP_SLEEP_IDLE       (PRCM_REQ_MB4 + 0x0)
 197 #define PRCM_REQ_MB4_DDR_ST_AP_DEEP_IDLE        (PRCM_REQ_MB4 + 0x1)
 198 #define PRCM_REQ_MB4_ESRAM0_ST                  (PRCM_REQ_MB4 + 0x3)
 199 #define PRCM_REQ_MB4_HOTDOG_THRESHOLD           (PRCM_REQ_MB4 + 0x0)
 200 #define PRCM_REQ_MB4_HOTMON_LOW                 (PRCM_REQ_MB4 + 0x0)
 201 #define PRCM_REQ_MB4_HOTMON_HIGH                (PRCM_REQ_MB4 + 0x1)
 202 #define PRCM_REQ_MB4_HOTMON_CONFIG              (PRCM_REQ_MB4 + 0x2)
 203 #define PRCM_REQ_MB4_HOT_PERIOD                 (PRCM_REQ_MB4 + 0x0)
 204 #define HOTMON_CONFIG_LOW                       BIT(0)
 205 #define HOTMON_CONFIG_HIGH                      BIT(1)
 206 #define PRCM_REQ_MB4_A9WDOG_0                   (PRCM_REQ_MB4 + 0x0)
 207 #define PRCM_REQ_MB4_A9WDOG_1                   (PRCM_REQ_MB4 + 0x1)
 208 #define PRCM_REQ_MB4_A9WDOG_2                   (PRCM_REQ_MB4 + 0x2)
 209 #define PRCM_REQ_MB4_A9WDOG_3                   (PRCM_REQ_MB4 + 0x3)
 210 #define A9WDOG_AUTO_OFF_EN                      BIT(7)
 211 #define A9WDOG_AUTO_OFF_DIS                     0
 212 #define A9WDOG_ID_MASK                          0xf
 213
 214 /* Mailbox 5 Requests */
 215 #define PRCM_REQ_MB5_I2C_SLAVE_OP       (PRCM_REQ_MB5 + 0x0)
 216 #define PRCM_REQ_MB5_I2C_HW_BITS        (PRCM_REQ_MB5 + 0x1)
 217 #define PRCM_REQ_MB5_I2C_REG            (PRCM_REQ_MB5 + 0x2)
 218 #define PRCM_REQ_MB5_I2C_VAL            (PRCM_REQ_MB5 + 0x3)
 219 #define PRCMU_I2C_WRITE(slave) \
 220         (((slave) << 1) | (cpu_is_u8500v2() ? BIT(6) : 0))
 221 #define PRCMU_I2C_READ(slave) \
 222         (((slave) << 1) | BIT(0) | (cpu_is_u8500v2() ? BIT(6) : 0))
 223 #define PRCMU_I2C_STOP_EN               BIT(3)
 224
 225 /* Mailbox 5 ACKs */
 226 #define PRCM_ACK_MB5_I2C_STATUS (PRCM_ACK_MB5 + 0x1)
 227 #define PRCM_ACK_MB5_I2C_VAL    (PRCM_ACK_MB5 + 0x3)
 228 #define I2C_WR_OK 0x1
 229 #define I2C_RD_OK 0x2
 230
 231 #define NUM_MB 8
 232 #define MBOX_BIT BIT
 233 #define ALL_MBOX_BITS (MBOX_BIT(NUM_MB) - 1)
 234
 235 /*
 236  * Wakeups/IRQs
 237  */
 238
 239 #define WAKEUP_BIT_RTC BIT(0)
 240 #define WAKEUP_BIT_RTT0 BIT(1)
 241 #define WAKEUP_BIT_RTT1 BIT(2)
 242 #define WAKEUP_BIT_HSI0 BIT(3)
 243 #define WAKEUP_BIT_HSI1 BIT(4)
 244 #define WAKEUP_BIT_CA_WAKE BIT(5)
 245 #define WAKEUP_BIT_USB BIT(6)
 246 #define WAKEUP_BIT_ABB BIT(7)
 247 #define WAKEUP_BIT_ABB_FIFO BIT(8)
 248 #define WAKEUP_BIT_SYSCLK_OK BIT(9)
 249 #define WAKEUP_BIT_CA_SLEEP BIT(10)
 250 #define WAKEUP_BIT_AC_WAKE_ACK BIT(11)
 251 #define WAKEUP_BIT_SIDE_TONE_OK BIT(12)
 252 #define WAKEUP_BIT_ANC_OK BIT(13)
 253 #define WAKEUP_BIT_SW_ERROR BIT(14)
 254 #define WAKEUP_BIT_AC_SLEEP_ACK BIT(15)
 255 #define WAKEUP_BIT_ARM BIT(17)
 256 #define WAKEUP_BIT_HOTMON_LOW BIT(18)
 257 #define WAKEUP_BIT_HOTMON_HIGH BIT(19)
 258 #define WAKEUP_BIT_MODEM_SW_RESET_REQ BIT(20)
 259 #define WAKEUP_BIT_GPIO0 BIT(23)
 260 #define WAKEUP_BIT_GPIO1 BIT(24)
 261 #define WAKEUP_BIT_GPIO2 BIT(25)
 262 #define WAKEUP_BIT_GPIO3 BIT(26)
 263 #define WAKEUP_BIT_GPIO4 BIT(27)
 264 #define WAKEUP_BIT_GPIO5 BIT(28)
 265 #define WAKEUP_BIT_GPIO6 BIT(29)
 266 #define WAKEUP_BIT_GPIO7 BIT(30)
 267 #define WAKEUP_BIT_GPIO8 BIT(31)
 268
 269 /*
 270  * This vector maps irq numbers to the bits in the bit field used in
 271  * communication with the PRCMU firmware.
 272  *
 273  * The reason for having this is to keep the irq numbers contiguous even though
 274  * the bits in the bit field are not. (The bits also have a tendency to move
 275  * around, to further complicate matters.)
 276  */
 277 #define IRQ_INDEX(_name) ((IRQ_PRCMU_##_name) - IRQ_PRCMU_BASE)
 278 #define IRQ_ENTRY(_name)[IRQ_INDEX(_name)] = (WAKEUP_BIT_##_name)
 279 static u32 prcmu_irq_bit[NUM_PRCMU_WAKEUPS] = {
 280         IRQ_ENTRY(RTC),
 281         IRQ_ENTRY(RTT0),
 282         IRQ_ENTRY(RTT1),
 283         IRQ_ENTRY(HSI0),
 284         IRQ_ENTRY(HSI1),
 285         IRQ_ENTRY(CA_WAKE),
 286         IRQ_ENTRY(USB),
 287         IRQ_ENTRY(ABB),
 288         IRQ_ENTRY(ABB_FIFO),
 289         IRQ_ENTRY(CA_SLEEP),
 290         IRQ_ENTRY(ARM),
 291         IRQ_ENTRY(HOTMON_LOW),
 292         IRQ_ENTRY(HOTMON_HIGH),
 293         IRQ_ENTRY(MODEM_SW_RESET_REQ),
 294         IRQ_ENTRY(GPIO0),
 295         IRQ_ENTRY(GPIO1),
 296         IRQ_ENTRY(GPIO2),
 297         IRQ_ENTRY(GPIO3),
 298         IRQ_ENTRY(GPIO4),
 299         IRQ_ENTRY(GPIO5),
 300         IRQ_ENTRY(GPIO6),
 301         IRQ_ENTRY(GPIO7),
 302         IRQ_ENTRY(GPIO8)
 303 };
 304
 305 #define VALID_WAKEUPS (BIT(NUM_PRCMU_WAKEUP_INDICES) - 1)
 306 #define WAKEUP_ENTRY(_name)[PRCMU_WAKEUP_INDEX_##_name] = (WAKEUP_BIT_##_name)
 307 static u32 prcmu_wakeup_bit[NUM_PRCMU_WAKEUP_INDICES] = {
 308         WAKEUP_ENTRY(RTC),
 309         WAKEUP_ENTRY(RTT0),
 310         WAKEUP_ENTRY(RTT1),
 311         WAKEUP_ENTRY(HSI0),
 312         WAKEUP_ENTRY(HSI1),
 313         WAKEUP_ENTRY(USB),
 314         WAKEUP_ENTRY(ABB),
 315         WAKEUP_ENTRY(ABB_FIFO),
 316         WAKEUP_ENTRY(ARM)
 317 };
 318
 319 /*
 320  * mb0_transfer - state needed for mailbox 0 communication.
 321  * @lock:               The transaction lock.
 322  * @dbb_events_lock:    A lock used to handle concurrent access to (parts of)
 323  *                      the request data.
 324  * @mask_work:          Work structure used for (un)masking wakeup interrupts.
 325  * @req:                Request data that need to persist between requests.
 326  */
 327 static struct {
 328         spinlock_t lock;
 329         spinlock_t dbb_irqs_lock;
 330         struct work_struct mask_work;
 331         struct mutex ac_wake_lock;
 332         struct completion ac_wake_work;
 333         struct {
 334                 u32 dbb_irqs;
 335                 u32 dbb_wakeups;
 336                 u32 abb_events;
 337         } req;
 338 } mb0_transfer;
 339
 340 /*
 341  * mb1_transfer - state needed for mailbox 1 communication.
 342  * @lock:       The transaction lock.
 343  * @work:       The transaction completion structure.
 344  * @ack:        Reply ("acknowledge") data.
 345  */
 346 static struct {
 347         struct mutex lock;
 348         struct completion work;
 349         struct {
 350                 u8 header;
 351                 u8 arm_opp;
 352                 u8 ape_opp;
 353                 u8 ape_voltage_status;
 354         } ack;
 355 } mb1_transfer;
 356
 357 /*
 358  * mb2_transfer - state needed for mailbox 2 communication.
 359  * @lock:            The transaction lock.
 360  * @work:            The transaction completion structure.
 361  * @auto_pm_lock:    The autonomous power management configuration lock.
 362  * @auto_pm_enabled: A flag indicating whether autonomous PM is enabled.
 363  * @req:             Request data that need to persist between requests.
 364  * @ack:             Reply ("acknowledge") data.
 365  */
 366 static struct {
 367         struct mutex lock;
 368         struct completion work;
 369         spinlock_t auto_pm_lock;
 370         bool auto_pm_enabled;
 371         struct {
 372                 u8 status;
 373         } ack;
 374 } mb2_transfer;
 375
 376 /*
 377  * mb3_transfer - state needed for mailbox 3 communication.
 378  * @lock:               The request lock.
 379  * @sysclk_lock:        A lock used to handle concurrent sysclk requests.
 380  * @sysclk_work:        Work structure used for sysclk requests.
 381  */
 382 static struct {
 383         spinlock_t lock;
 384         struct mutex sysclk_lock;
 385         struct completion sysclk_work;
 386 } mb3_transfer;
 387
 388 /*
 389  * mb4_transfer - state needed for mailbox 4 communication.
 390  * @lock:       The transaction lock.
 391  * @work:       The transaction completion structure.
 392  */
 393 static struct {
 394         struct mutex lock;
 395         struct completion work;
 396 } mb4_transfer;
 397
 398 /*
 399  * mb5_transfer - state needed for mailbox 5 communication.
 400  * @lock:       The transaction lock.
 401  * @work:       The transaction completion structure.
 402  * @ack:        Reply ("acknowledge") data.
 403  */
 404 static struct {
 405         struct mutex lock;
 406         struct completion work;
 407         struct {
 408                 u8 status;
 409                 u8 value;
 410         } ack;
 411 } mb5_transfer;
 412
 413 static atomic_t ac_wake_req_state = ATOMIC_INIT(0);
 414
 415 /* Spinlocks */
 416 static DEFINE_SPINLOCK(clkout_lock);
 417 static DEFINE_SPINLOCK(gpiocr_lock);
 418
 419 /* Global var to runtime determine TCDM base for v2 or v1 */
 420 static __iomem void *tcdm_base;
 421
 422 struct clk_mgt {
 423         unsigned int offset;
 424         u32 pllsw;
 425 };
 426
 427 static DEFINE_SPINLOCK(clk_mgt_lock);
 428
 429 #define CLK_MGT_ENTRY(_name)[PRCMU_##_name] = { (PRCM_##_name##_MGT_OFF), 0 }
 430 struct clk_mgt clk_mgt[PRCMU_NUM_REG_CLOCKS] = {
 431         CLK_MGT_ENTRY(SGACLK),
 432         CLK_MGT_ENTRY(UARTCLK),
 433         CLK_MGT_ENTRY(MSP02CLK),
 434         CLK_MGT_ENTRY(MSP1CLK),
 435         CLK_MGT_ENTRY(I2CCLK),
 436         CLK_MGT_ENTRY(SDMMCCLK),
 437         CLK_MGT_ENTRY(SLIMCLK),
 438         CLK_MGT_ENTRY(PER1CLK),
 439         CLK_MGT_ENTRY(PER2CLK),
 440         CLK_MGT_ENTRY(PER3CLK),
 441         CLK_MGT_ENTRY(PER5CLK),
 442         CLK_MGT_ENTRY(PER6CLK),
 443         CLK_MGT_ENTRY(PER7CLK),
 444         CLK_MGT_ENTRY(LCDCLK),
 445         CLK_MGT_ENTRY(BMLCLK),
 446         CLK_MGT_ENTRY(HSITXCLK),
 447         CLK_MGT_ENTRY(HSIRXCLK),
 448         CLK_MGT_ENTRY(HDMICLK),
 449         CLK_MGT_ENTRY(APEATCLK),
 450         CLK_MGT_ENTRY(APETRACECLK),
 451         CLK_MGT_ENTRY(MCDECLK),
 452         CLK_MGT_ENTRY(IPI2CCLK),
 453         CLK_MGT_ENTRY(DSIALTCLK),
 454         CLK_MGT_ENTRY(DMACLK),
 455         CLK_MGT_ENTRY(B2R2CLK),
 456         CLK_MGT_ENTRY(TVCLK),
 457         CLK_MGT_ENTRY(SSPCLK),
 458         CLK_MGT_ENTRY(RNGCLK),
 459         CLK_MGT_ENTRY(UICCCLK),
 460 };
 461
 462 static struct regulator *hwacc_regulator[NUM_HW_ACC];
 463 static struct regulator *hwacc_ret_regulator[NUM_HW_ACC];
 464
 465 static bool hwacc_enabled[NUM_HW_ACC];
 466 static bool hwacc_ret_enabled[NUM_HW_ACC];
 467
 468 static const char *hwacc_regulator_name[NUM_HW_ACC] = {
 469         [HW_ACC_SVAMMDSP]       = "hwacc-sva-mmdsp",
 470         [HW_ACC_SVAPIPE]        = "hwacc-sva-pipe",
 471         [HW_ACC_SIAMMDSP]       = "hwacc-sia-mmdsp",
 472         [HW_ACC_SIAPIPE]        = "hwacc-sia-pipe",
 473         [HW_ACC_SGA]            = "hwacc-sga",
 474         [HW_ACC_B2R2]           = "hwacc-b2r2",
 475         [HW_ACC_MCDE]           = "hwacc-mcde",
 476         [HW_ACC_ESRAM1]         = "hwacc-esram1",
 477         [HW_ACC_ESRAM2]         = "hwacc-esram2",
 478         [HW_ACC_ESRAM3]         = "hwacc-esram3",
 479         [HW_ACC_ESRAM4]         = "hwacc-esram4",
 480 };
 481
 482 static const char *hwacc_ret_regulator_name[NUM_HW_ACC] = {
 483         [HW_ACC_SVAMMDSP]       = "hwacc-sva-mmdsp-ret",
 484         [HW_ACC_SIAMMDSP]       = "hwacc-sia-mmdsp-ret",
 485         [HW_ACC_ESRAM1]         = "hwacc-esram1-ret",
 486         [HW_ACC_ESRAM2]         = "hwacc-esram2-ret",
 487         [HW_ACC_ESRAM3]         = "hwacc-esram3-ret",
 488         [HW_ACC_ESRAM4]         = "hwacc-esram4-ret",
 489 };
 490
 491 /*
 492 * Used by MCDE to setup all necessary PRCMU registers
 493 */
 494 #define PRCMU_RESET_DSIPLL              0x00004000
 495 #define PRCMU_UNCLAMP_DSIPLL            0x00400800
 496
 497 #define PRCMU_CLK_PLL_DIV_SHIFT         0
 498 #define PRCMU_CLK_PLL_SW_SHIFT          5
 499 #define PRCMU_CLK_38                    (1 << 9)
 500 #define PRCMU_CLK_38_SRC                (1 << 10)
 501 #define PRCMU_CLK_38_DIV                (1 << 11)
 502
 503 /* PLLDIV=12, PLLSW=4 (PLLDDR) */
 504 #define PRCMU_DSI_CLOCK_SETTING         0x0000008C
 505
 506 /* PLLDIV=8, PLLSW=4 (PLLDDR) */
 507 #define PRCMU_DSI_CLOCK_SETTING_U8400   0x00000088
 508
 509 /* DPI 50000000 Hz */
 510 #define PRCMU_DPI_CLOCK_SETTING         ((1 << PRCMU_CLK_PLL_SW_SHIFT) | \
 511                                           (16 << PRCMU_CLK_PLL_DIV_SHIFT))
 512 #define PRCMU_DSI_LP_CLOCK_SETTING      0x00000E00
 513
 514 /* D=101, N=1, R=4, SELDIV2=0 */
 515 #define PRCMU_PLLDSI_FREQ_SETTING       0x00040165
 516
 517 /* D=70, N=1, R=3, SELDIV2=0 */
 518 #define PRCMU_PLLDSI_FREQ_SETTING_U8400 0x00030146
 519
 520 #define PRCMU_ENABLE_PLLDSI             0x00000001
 521 #define PRCMU_DISABLE_PLLDSI            0x00000000
 522 #define PRCMU_RELEASE_RESET_DSS         0x0000400C
 523 #define PRCMU_DSI_PLLOUT_SEL_SETTING    0x00000202
 524 /* ESC clk, div0=1, div1=1, div2=3 */
 525 #define PRCMU_ENABLE_ESCAPE_CLOCK_DIV   0x07030101
 526 #define PRCMU_DISABLE_ESCAPE_CLOCK_DIV  0x00030101
 527 #define PRCMU_DSI_RESET_SW              0x00000007
 528
 529 #define PRCMU_PLLDSI_LOCKP_LOCKED       0x3
 530
 531 static struct {
 532         u8 project_number;
 533         u8 api_version;
 534         u8 func_version;
 535         u8 errata;
 536 } prcmu_version;
 537
 538
 539 int db8500_prcmu_enable_dsipll(void)
 540 {
 541         int i;
 542         unsigned int plldsifreq;
 543
 544         /* Clear DSIPLL_RESETN */
 545         writel(PRCMU_RESET_DSIPLL, PRCM_APE_RESETN_CLR);
 546         /* Unclamp DSIPLL in/out */
 547         writel(PRCMU_UNCLAMP_DSIPLL, PRCM_MMIP_LS_CLAMP_CLR);
 548
 549         if (prcmu_is_u8400())
 550                 plldsifreq = PRCMU_PLLDSI_FREQ_SETTING_U8400;
 551         else
 552                 plldsifreq = PRCMU_PLLDSI_FREQ_SETTING;
 553         /* Set DSI PLL FREQ */
 554         writel(plldsifreq, PRCM_PLLDSI_FREQ);
 555         writel(PRCMU_DSI_PLLOUT_SEL_SETTING, PRCM_DSI_PLLOUT_SEL);
 556         /* Enable Escape clocks */
 557         writel(PRCMU_ENABLE_ESCAPE_CLOCK_DIV, PRCM_DSITVCLK_DIV);
 558
 559         /* Start DSI PLL */
 560         writel(PRCMU_ENABLE_PLLDSI, PRCM_PLLDSI_ENABLE);
 561         /* Reset DSI PLL */
 562         writel(PRCMU_DSI_RESET_SW, PRCM_DSI_SW_RESET);
 563         for (i = 0; i < 10; i++) {
 564                 if ((readl(PRCM_PLLDSI_LOCKP) & PRCMU_PLLDSI_LOCKP_LOCKED)
 565                                         == PRCMU_PLLDSI_LOCKP_LOCKED)
 566                         break;
 567                 udelay(100);
 568         }
 569         /* Set DSIPLL_RESETN */
 570         writel(PRCMU_RESET_DSIPLL, PRCM_APE_RESETN_SET);
 571         return 0;
 572 }
 573
 574 int db8500_prcmu_disable_dsipll(void)
 575 {
 576         /* Disable dsi pll */
 577         writel(PRCMU_DISABLE_PLLDSI, PRCM_PLLDSI_ENABLE);
 578         /* Disable  escapeclock */
 579         writel(PRCMU_DISABLE_ESCAPE_CLOCK_DIV, PRCM_DSITVCLK_DIV);
 580         return 0;
 581 }
 582
 583 int db8500_prcmu_set_display_clocks(void)
 584 {
 585         unsigned long flags;
 586         unsigned int dsiclk;
 587
 588         if (prcmu_is_u8400())
 589                 dsiclk = PRCMU_DSI_CLOCK_SETTING_U8400;
 590         else
 591                 dsiclk = PRCMU_DSI_CLOCK_SETTING;
 592
 593         spin_lock_irqsave(&clk_mgt_lock, flags);
 594
 595         /* Grab the HW semaphore. */
 596         while ((readl(PRCM_SEM) & PRCM_SEM_PRCM_SEM) != 0)
 597                 cpu_relax();
 598
 599         writel(dsiclk, PRCM_HDMICLK_MGT);
 600         writel(PRCMU_DSI_LP_CLOCK_SETTING, PRCM_TVCLK_MGT);
 601         writel(PRCMU_DPI_CLOCK_SETTING, PRCM_LCDCLK_MGT);
 602
 603         /* Release the HW semaphore. */
 604         writel(0, PRCM_SEM);
 605
 606         spin_unlock_irqrestore(&clk_mgt_lock, flags);
 607
 608         return 0;
 609 }
 610
 611 /**
 612  * prcmu_enable_spi2 - Enables pin muxing for SPI2 on OtherAlternateC1.
 613  */
 614 void prcmu_enable_spi2(void)
 615 {
 616         u32 reg;
 617         unsigned long flags;
 618
 619         spin_lock_irqsave(&gpiocr_lock, flags);
 620         reg = readl(PRCM_GPIOCR);
 621         writel(reg | PRCM_GPIOCR_SPI2_SELECT, PRCM_GPIOCR);
 622         spin_unlock_irqrestore(&gpiocr_lock, flags);
 623 }
 624
 625 /**
 626  * prcmu_disable_spi2 - Disables pin muxing for SPI2 on OtherAlternateC1.
 627  */
 628 void prcmu_disable_spi2(void)
 629 {
 630         u32 reg;
 631         unsigned long flags;
 632
 633         spin_lock_irqsave(&gpiocr_lock, flags);
 634         reg = readl(PRCM_GPIOCR);
 635         writel(reg & ~PRCM_GPIOCR_SPI2_SELECT, PRCM_GPIOCR);
 636         spin_unlock_irqrestore(&gpiocr_lock, flags);
 637 }
 638
 639 bool prcmu_has_arm_maxopp(void)
 640 {
 641         return (readb(tcdm_base + PRCM_AVS_VARM_MAX_OPP) &
 642                 PRCM_AVS_ISMODEENABLE_MASK) == PRCM_AVS_ISMODEENABLE_MASK;
 643 }
 644
 645 bool prcmu_is_u8400(void)
 646 {
 647         return prcmu_version.project_number == PRCMU_PROJECT_ID_8400V2_0;
 648 }
 649
 650 /**
 651  * prcmu_get_boot_status - PRCMU boot status checking
 652  * Returns: the current PRCMU boot status
 653  */
 654 int prcmu_get_boot_status(void)
 655 {
 656         return readb(tcdm_base + PRCM_BOOT_STATUS);
 657 }
 658
 659 /**
 660  * prcmu_set_rc_a2p - This function is used to run few power state sequences
 661  * @val: Value to be set, i.e. transition requested
 662  * Returns: 0 on success, -EINVAL on invalid argument
 663  *
 664  * This function is used to run the following power state sequences -
 665  * any state to ApReset,  ApDeepSleep to ApExecute, ApExecute to ApDeepSleep
 666  */
 667 int prcmu_set_rc_a2p(enum romcode_write val)
 668 {
 669         if (val < RDY_2_DS || val > RDY_2_XP70_RST)
 670                 return -EINVAL;
 671         writeb(val, (tcdm_base + PRCM_ROMCODE_A2P));
 672         return 0;
 673 }
 674
 675 /**
 676  * prcmu_get_rc_p2a - This function is used to get power state sequences
 677  * Returns: the power transition that has last happened
 678  *
 679  * This function can return the following transitions-
 680  * any state to ApReset,  ApDeepSleep to ApExecute, ApExecute to ApDeepSleep
 681  */
 682 enum romcode_read prcmu_get_rc_p2a(void)
 683 {
 684         return readb(tcdm_base + PRCM_ROMCODE_P2A);
 685 }
 686
 687 /**
 688  * prcmu_get_current_mode - Return the current XP70 power mode
 689  * Returns: Returns the current AP(ARM) power mode: init,
 690  * apBoot, apExecute, apDeepSleep, apSleep, apIdle, apReset
 691  */
 692 enum ap_pwrst prcmu_get_xp70_current_state(void)
 693 {
 694         return readb(tcdm_base + PRCM_XP70_CUR_PWR_STATE);
 695 }
 696
 697 /**
 698  * prcmu_config_clkout - Configure one of the programmable clock outputs.
 699  * @clkout:     The CLKOUT number (0 or 1).
 700  * @source:     The clock to be used (one of the PRCMU_CLKSRC_*).
 701  * @div:        The divider to be applied.
 702  *
 703  * Configures one of the programmable clock outputs (CLKOUTs).
 704  * @div should be in the range [1,63] to request a configuration, or 0 to
 705  * inform that the configuration is no longer requested.
 706  */
 707 int prcmu_config_clkout(u8 clkout, u8 source, u8 div)
 708 {
 709         static int requests[2];
 710         int r = 0;
 711         unsigned long flags;
 712         u32 val;
 713         u32 bits;
 714         u32 mask;
 715         u32 div_mask;
 716
 717         BUG_ON(clkout > 1);
 718         BUG_ON(div > 63);
 719         BUG_ON((clkout == 0) && (source > PRCMU_CLKSRC_CLK009));
 720
 721         if (!div && !requests[clkout])
 722                 return -EINVAL;
 723
 724         switch (clkout) {
 725         case 0:
 726                 div_mask = PRCM_CLKOCR_CLKODIV0_MASK;
 727                 mask = (PRCM_CLKOCR_CLKODIV0_MASK | PRCM_CLKOCR_CLKOSEL0_MASK);
 728                 bits = ((source << PRCM_CLKOCR_CLKOSEL0_SHIFT) |
 729                         (div << PRCM_CLKOCR_CLKODIV0_SHIFT));
 730                 break;
 731         case 1:
 732                 div_mask = PRCM_CLKOCR_CLKODIV1_MASK;
 733                 mask = (PRCM_CLKOCR_CLKODIV1_MASK | PRCM_CLKOCR_CLKOSEL1_MASK |
 734                         PRCM_CLKOCR_CLK1TYPE);
 735                 bits = ((source << PRCM_CLKOCR_CLKOSEL1_SHIFT) |
 736                         (div << PRCM_CLKOCR_CLKODIV1_SHIFT));
 737                 break;
 738         }
 739         bits &= mask;
 740
 741         spin_lock_irqsave(&clkout_lock, flags);
 742
 743         val = readl(PRCM_CLKOCR);
 744         if (val & div_mask) {
 745                 if (div) {
 746                         if ((val & mask) != bits) {
 747                                 r = -EBUSY;
 748                                 goto unlock_and_return;
 749                         }
 750                 } else {
 751                         if ((val & mask & ~div_mask) != bits) {
 752                                 r = -EINVAL;
 753                                 goto unlock_and_return;
 754                         }
 755                 }
 756         }
 757         writel((bits | (val & ~mask)), PRCM_CLKOCR);
 758         requests[clkout] += (div ? 1 : -1);
 759
 760 unlock_and_return:
 761         spin_unlock_irqrestore(&clkout_lock, flags);
 762
 763         return r;
 764 }
 765
 766 int db8500_prcmu_set_power_state(u8 state, bool keep_ulp_clk, bool keep_ap_pll)
 767 {
 768         unsigned long flags;
 769
 770         BUG_ON((state < PRCMU_AP_SLEEP) || (PRCMU_AP_DEEP_IDLE < state));
 771
 772         spin_lock_irqsave(&mb0_transfer.lock, flags);
 773
 774         while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(0))
 775                 cpu_relax();
 776
 777         writeb(MB0H_POWER_STATE_TRANS, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB0));
 778         writeb(state, (tcdm_base + PRCM_REQ_MB0_AP_POWER_STATE));
 779         writeb((keep_ap_pll ? 1 : 0), (tcdm_base + PRCM_REQ_MB0_AP_PLL_STATE));
 780         writeb((keep_ulp_clk ? 1 : 0),
 781                 (tcdm_base + PRCM_REQ_MB0_ULP_CLOCK_STATE));
 782         writeb(0, (tcdm_base + PRCM_REQ_MB0_DO_NOT_WFI));
 783         writel(MBOX_BIT(0), PRCM_MBOX_CPU_SET);
 784
 785         spin_unlock_irqrestore(&mb0_transfer.lock, flags);
 786
 787         return 0;
 788 }
 789
 790 /* This function should only be called while mb0_transfer.lock is held. */
 791 static void config_wakeups(void)
 792 {
 793         const u8 header[2] = {
 794                 MB0H_CONFIG_WAKEUPS_EXE,
 795                 MB0H_CONFIG_WAKEUPS_SLEEP
 796         };
 797         static u32 last_dbb_events;
 798         static u32 last_abb_events;
 799         u32 dbb_events;
 800         u32 abb_events;
 801         unsigned int i;
 802
 803         dbb_events = mb0_transfer.req.dbb_irqs | mb0_transfer.req.dbb_wakeups;
 804         dbb_events |= (WAKEUP_BIT_AC_WAKE_ACK | WAKEUP_BIT_AC_SLEEP_ACK);
 805
 806         abb_events = mb0_transfer.req.abb_events;
 807
 808         if ((dbb_events == last_dbb_events) && (abb_events == last_abb_events))
 809                 return;
 810
 811         for (i = 0; i < 2; i++) {
 812                 while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(0))
 813                         cpu_relax();
 814                 writel(dbb_events, (tcdm_base + PRCM_REQ_MB0_WAKEUP_8500));
 815                 writel(abb_events, (tcdm_base + PRCM_REQ_MB0_WAKEUP_4500));
 816                 writeb(header[i], (tcdm_base + PRCM_MBOX_HEADER_REQ_MB0));
 817                 writel(MBOX_BIT(0), PRCM_MBOX_CPU_SET);
 818         }
 819         last_dbb_events = dbb_events;
 820         last_abb_events = abb_events;
 821 }
 822
 823 void db8500_prcmu_enable_wakeups(u32 wakeups)
 824 {
 825         unsigned long flags;
 826         u32 bits;
 827         int i;
 828
 829         BUG_ON(wakeups != (wakeups & VALID_WAKEUPS));
 830
 831         for (i = 0, bits = 0; i < NUM_PRCMU_WAKEUP_INDICES; i++) {
 832                 if (wakeups & BIT(i))
 833                         bits |= prcmu_wakeup_bit[i];
 834         }
 835
 836         spin_lock_irqsave(&mb0_transfer.lock, flags);
 837
 838         mb0_transfer.req.dbb_wakeups = bits;
 839         config_wakeups();
 840
 841         spin_unlock_irqrestore(&mb0_transfer.lock, flags);
 842 }
 843
 844 void db8500_prcmu_config_abb_event_readout(u32 abb_events)
 845 {
 846         unsigned long flags;
 847
 848         spin_lock_irqsave(&mb0_transfer.lock, flags);
 849
 850         mb0_transfer.req.abb_events = abb_events;
 851         config_wakeups();
 852
 853         spin_unlock_irqrestore(&mb0_transfer.lock, flags);
 854 }
 855
 856 void db8500_prcmu_get_abb_event_buffer(void __iomem **buf)
 857 {
 858         if (readb(tcdm_base + PRCM_ACK_MB0_READ_POINTER) & 1)
 859                 *buf = (tcdm_base + PRCM_ACK_MB0_WAKEUP_1_4500);
 860         else
 861                 *buf = (tcdm_base + PRCM_ACK_MB0_WAKEUP_0_4500);
 862 }
 863
 864 /**
 865  * db8500_prcmu_set_arm_opp - set the appropriate ARM OPP
 866  * @opp: The new ARM operating point to which transition is to be made
 867  * Returns: 0 on success, non-zero on failure
 868  *
 869  * This function sets the the operating point of the ARM.
 870  */
 871 int db8500_prcmu_set_arm_opp(u8 opp)
 872 {
 873         int r;
 874
 875         if (opp < ARM_NO_CHANGE || opp > ARM_EXTCLK)
 876                 return -EINVAL;
 877
 878         r = 0;
 879
 880         mutex_lock(&mb1_transfer.lock);
 881
 882         while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(1))
 883                 cpu_relax();
 884
 885         writeb(MB1H_ARM_APE_OPP, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1));
 886         writeb(opp, (tcdm_base + PRCM_REQ_MB1_ARM_OPP));
 887         writeb(APE_NO_CHANGE, (tcdm_base + PRCM_REQ_MB1_APE_OPP));
 888
 889         writel(MBOX_BIT(1), PRCM_MBOX_CPU_SET);
 890         wait_for_completion(&mb1_transfer.work);
 891
 892         if ((mb1_transfer.ack.header != MB1H_ARM_APE_OPP) ||
 893                 (mb1_transfer.ack.arm_opp != opp))
 894                 r = -EIO;
 895
 896         mutex_unlock(&mb1_transfer.lock);
 897
 898         return r;
 899 }
 900
 901 /**
 902  * db8500_prcmu_get_arm_opp - get the current ARM OPP
 903  *
 904  * Returns: the current ARM OPP
 905  */
 906 int db8500_prcmu_get_arm_opp(void)
 907 {
 908         return readb(tcdm_base + PRCM_ACK_MB1_CURRENT_ARM_OPP);
 909 }
 910
 911 /**
 912  * prcmu_get_ddr_opp - get the current DDR OPP
 913  *
 914  * Returns: the current DDR OPP
 915  */
 916 int prcmu_get_ddr_opp(void)
 917 {
 918         return readb(PRCM_DDR_SUBSYS_APE_MINBW);
 919 }
 920
 921 /**
 922  * set_ddr_opp - set the appropriate DDR OPP
 923  * @opp: The new DDR operating point to which transition is to be made
 924  * Returns: 0 on success, non-zero on failure
 925  *
 926  * This function sets the operating point of the DDR.
 927  */
 928 int prcmu_set_ddr_opp(u8 opp)
 929 {
 930         if (opp < DDR_100_OPP || opp > DDR_25_OPP)
 931                 return -EINVAL;
 932         /* Changing the DDR OPP can hang the hardware pre-v21 */
 933         if (cpu_is_u8500v20_or_later() && !cpu_is_u8500v20())
 934                 writeb(opp, PRCM_DDR_SUBSYS_APE_MINBW);
 935
 936         return 0;
 937 }
 938 /**
 939  * set_ape_opp - set the appropriate APE OPP
 940  * @opp: The new APE operating point to which transition is to be made
 941  * Returns: 0 on success, non-zero on failure
 942  *
 943  * This function sets the operating point of the APE.
 944  */
 945 int prcmu_set_ape_opp(u8 opp)
 946 {
 947         int r = 0;
 948
 949         mutex_lock(&mb1_transfer.lock);
 950
 951         while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(1))
 952                 cpu_relax();
 953
 954         writeb(MB1H_ARM_APE_OPP, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1));
 955         writeb(ARM_NO_CHANGE, (tcdm_base + PRCM_REQ_MB1_ARM_OPP));
 956         writeb(opp, (tcdm_base + PRCM_REQ_MB1_APE_OPP));
 957
 958         writel(MBOX_BIT(1), PRCM_MBOX_CPU_SET);
 959         wait_for_completion(&mb1_transfer.work);
 960
 961         if ((mb1_transfer.ack.header != MB1H_ARM_APE_OPP) ||
 962                 (mb1_transfer.ack.ape_opp != opp))
 963                 r = -EIO;
 964
 965         mutex_unlock(&mb1_transfer.lock);
 966
 967         return r;
 968 }
 969
 970 /**
 971  * prcmu_get_ape_opp - get the current APE OPP
 972  *
 973  * Returns: the current APE OPP
 974  */
 975 int prcmu_get_ape_opp(void)
 976 {
 977         return readb(tcdm_base + PRCM_ACK_MB1_CURRENT_APE_OPP);
 978 }
 979
 980 /**
 981  * prcmu_request_ape_opp_100_voltage - Request APE OPP 100% voltage
 982  * @enable: true to request the higher voltage, false to drop a request.
 983  *
 984  * Calls to this function to enable and disable requests must be balanced.
 985  */
 986 int prcmu_request_ape_opp_100_voltage(bool enable)
 987 {
 988         int r = 0;
 989         u8 header;
 990         static unsigned int requests;
 991
 992         mutex_lock(&mb1_transfer.lock);
 993
 994         if (enable) {
 995                 if (0 != requests++)
 996                         goto unlock_and_return;
 997                 header = MB1H_REQUEST_APE_OPP_100_VOLT;
 998         } else {
 999                 if (requests == 0) {
1000                         r = -EIO;
1001                         goto unlock_and_return;
1002                 } else if (1 != requests--) {
1003                         goto unlock_and_return;
1004                 }
1005                 header = MB1H_RELEASE_APE_OPP_100_VOLT;
1006         }
1007
1008         while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(1))
1009                 cpu_relax();
1010
1011         writeb(header, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1));
1012
1013         writel(MBOX_BIT(1), PRCM_MBOX_CPU_SET);
1014         wait_for_completion(&mb1_transfer.work);
1015
1016         if ((mb1_transfer.ack.header != header) ||
1017                 ((mb1_transfer.ack.ape_voltage_status & BIT(0)) != 0))
1018                 r = -EIO;
1019
1020 unlock_and_return:
1021         mutex_unlock(&mb1_transfer.lock);
1022
1023         return r;
1024 }
1025
1026 /**
1027  * prcmu_release_usb_wakeup_state - release the state required by a USB wakeup
1028  *
1029  * This function releases the power state requirements of a USB wakeup.
1030  */
1031 int prcmu_release_usb_wakeup_state(void)
1032 {
1033         int r = 0;
1034
1035         mutex_lock(&mb1_transfer.lock);
1036
1037         while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(1))
1038                 cpu_relax();
1039
1040         writeb(MB1H_RELEASE_USB_WAKEUP,
1041                 (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1));
1042
1043         writel(MBOX_BIT(1), PRCM_MBOX_CPU_SET);
1044         wait_for_completion(&mb1_transfer.work);
1045
1046         if ((mb1_transfer.ack.header != MB1H_RELEASE_USB_WAKEUP) ||
1047                 ((mb1_transfer.ack.ape_voltage_status & BIT(0)) != 0))
1048                 r = -EIO;
1049
1050         mutex_unlock(&mb1_transfer.lock);
1051
1052         return r;
1053 }
1054
1055 static int request_pll(u8 clock, bool enable)
1056 {
1057         int r = 0;
1058
1059         if (clock == PRCMU_PLLSOC1)
1060                 clock = (enable ? PLL_SOC1_ON : PLL_SOC1_OFF);
1061         else
1062                 return -EINVAL;
1063
1064         mutex_lock(&mb1_transfer.lock);
1065
1066         while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(1))
1067                 cpu_relax();
1068
1069         writeb(MB1H_PLL_ON_OFF, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1));
1070         writeb(clock, (tcdm_base + PRCM_REQ_MB1_PLL_ON_OFF));
1071
1072         writel(MBOX_BIT(1), PRCM_MBOX_CPU_SET);
1073         wait_for_completion(&mb1_transfer.work);
1074
1075         if (mb1_transfer.ack.header != MB1H_PLL_ON_OFF)
1076                 r = -EIO;
1077
1078         mutex_unlock(&mb1_transfer.lock);
1079
1080         return r;
1081 }
1082
1083 /**
1084  * prcmu_set_hwacc - set the power state of a h/w accelerator
1085  * @hwacc_dev: The hardware accelerator (enum hw_acc_dev).
1086  * @state: The new power state (enum hw_acc_state).
1087  *
1088  * This function sets the power state of a hardware accelerator.
1089  * This function should not be called from interrupt context.
1090  *
1091  * NOTE! Deprecated, to be removed when all users switched over to use the
1092  * regulator framework API.
1093  */
1094 int prcmu_set_hwacc(u16 hwacc_dev, u8 state)
1095 {
1096         int r = 0;
1097         bool ram_retention = false;
1098         bool enable, enable_ret;
1099
1100         /* check argument */
1101         BUG_ON(hwacc_dev >= NUM_HW_ACC);
1102
1103         /* get state of switches */
1104         enable = hwacc_enabled[hwacc_dev];
1105         enable_ret = hwacc_ret_enabled[hwacc_dev];
1106
1107         /* set flag if retention is possible */
1108         switch (hwacc_dev) {
1109         case HW_ACC_SVAMMDSP:
1110         case HW_ACC_SIAMMDSP:
1111         case HW_ACC_ESRAM1:
1112         case HW_ACC_ESRAM2:
1113         case HW_ACC_ESRAM3:
1114         case HW_ACC_ESRAM4:
1115                 ram_retention = true;
1116                 break;
1117         }
1118
1119         /* check argument */
1120         BUG_ON(state > HW_ON);
1121         BUG_ON(state == HW_OFF_RAMRET && !ram_retention);
1122
1123         /* modify enable flags */
1124         switch (state) {
1125         case HW_OFF:
1126                 enable_ret = false;
1127                 enable = false;
1128                 break;
1129         case HW_ON:
1130                 enable = true;
1131                 break;
1132         case HW_OFF_RAMRET:
1133                 enable_ret = true;
1134                 enable = false;
1135                 break;
1136         }
1137
1138         /* get regulator (lazy) */
1139         if (hwacc_regulator[hwacc_dev] == NULL) {
1140                 hwacc_regulator[hwacc_dev] = regulator_get(NULL,
1141                         hwacc_regulator_name[hwacc_dev]);
1142                 if (IS_ERR(hwacc_regulator[hwacc_dev])) {
1143                         pr_err("prcmu: failed to get supply %s\n",
1144                                 hwacc_regulator_name[hwacc_dev]);
1145                         r = PTR_ERR(hwacc_regulator[hwacc_dev]);
1146                         goto out;
1147                 }
1148         }
1149
1150         if (ram_retention) {
1151                 if (hwacc_ret_regulator[hwacc_dev] == NULL) {
1152                         hwacc_ret_regulator[hwacc_dev] = regulator_get(NULL,
1153                                 hwacc_ret_regulator_name[hwacc_dev]);
1154                         if (IS_ERR(hwacc_ret_regulator[hwacc_dev])) {
1155                                 pr_err("prcmu: failed to get supply %s\n",
1156                                         hwacc_ret_regulator_name[hwacc_dev]);
1157                                 r = PTR_ERR(hwacc_ret_regulator[hwacc_dev]);
1158                                 goto out;
1159                         }
1160                 }
1161         }
1162
1163         /* set regulators */
1164         if (ram_retention) {
1165                 if (enable_ret && !hwacc_ret_enabled[hwacc_dev]) {
1166                         r = regulator_enable(hwacc_ret_regulator[hwacc_dev]);
1167                         if (r < 0) {
1168                                 pr_err("prcmu_set_hwacc: ret enable failed\n");
1169                                 goto out;
1170                         }
1171                         hwacc_ret_enabled[hwacc_dev] = true;
1172                 }
1173         }
1174
1175         if (enable && !hwacc_enabled[hwacc_dev]) {
1176                 r = regulator_enable(hwacc_regulator[hwacc_dev]);
1177                 if (r < 0) {
1178                         pr_err("prcmu_set_hwacc: enable failed\n");
1179                         goto out;
1180                 }
1181                 hwacc_enabled[hwacc_dev] = true;
1182         }
1183
1184         if (!enable && hwacc_enabled[hwacc_dev]) {
1185                 r = regulator_disable(hwacc_regulator[hwacc_dev]);
1186                 if (r < 0) {
1187                         pr_err("prcmu_set_hwacc: disable failed\n");
1188                         goto out;
1189                 }
1190                 hwacc_enabled[hwacc_dev] = false;
1191         }
1192
1193         if (ram_retention) {
1194                 if (!enable_ret && hwacc_ret_enabled[hwacc_dev]) {
1195                         r = regulator_disable(hwacc_ret_regulator[hwacc_dev]);
1196                         if (r < 0) {
1197                                 pr_err("prcmu_set_hwacc: ret disable failed\n");
1198                                 goto out;
1199                         }
1200                         hwacc_ret_enabled[hwacc_dev] = false;
1201                 }
1202         }
1203
1204 out:
1205         return r;
1206 }
1207 EXPORT_SYMBOL(prcmu_set_hwacc);
1208
1209 /**
1210  * db8500_prcmu_set_epod - set the state of a EPOD (power domain)
1211  * @epod_id: The EPOD to set
1212  * @epod_state: The new EPOD state
1213  *
1214  * This function sets the state of a EPOD (power domain). It may not be called
1215  * from interrupt context.
1216  */
1217 int db8500_prcmu_set_epod(u16 epod_id, u8 epod_state)
1218 {
1219         int r = 0;
1220         bool ram_retention = false;
1221         int i;
1222
1223         /* check argument */
1224         BUG_ON(epod_id >= NUM_EPOD_ID);
1225
1226         /* set flag if retention is possible */
1227         switch (epod_id) {
1228         case EPOD_ID_SVAMMDSP:
1229         case EPOD_ID_SIAMMDSP:
1230         case EPOD_ID_ESRAM12:
1231         case EPOD_ID_ESRAM34:
1232                 ram_retention = true;
1233                 break;
1234         }
1235
1236         /* check argument */
1237         BUG_ON(epod_state > EPOD_STATE_ON);
1238         BUG_ON(epod_state == EPOD_STATE_RAMRET && !ram_retention);
1239
1240         /* get lock */
1241         mutex_lock(&mb2_transfer.lock);
1242
1243         /* wait for mailbox */
1244         while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(2))
1245                 cpu_relax();
1246
1247         /* fill in mailbox */
1248         for (i = 0; i < NUM_EPOD_ID; i++)
1249                 writeb(EPOD_STATE_NO_CHANGE, (tcdm_base + PRCM_REQ_MB2 + i));
1250         writeb(epod_state, (tcdm_base + PRCM_REQ_MB2 + epod_id));
1251
1252         writeb(MB2H_DPS, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB2));
1253
1254         writel(MBOX_BIT(2), PRCM_MBOX_CPU_SET);
1255
1256         /*
1257          * The current firmware version does not handle errors correctly,
1258          * and we cannot recover if there is an error.
1259          * This is expected to change when the firmware is updated.
1260          */
1261         if (!wait_for_completion_timeout(&mb2_transfer.work,
1262                         msecs_to_jiffies(20000))) {
1263                 pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n",
1264                         __func__);
1265                 r = -EIO;
1266                 goto unlock_and_return;
1267         }
1268
1269         if (mb2_transfer.ack.status != HWACC_PWR_ST_OK)
1270                 r = -EIO;
1271
1272 unlock_and_return:
1273         mutex_unlock(&mb2_transfer.lock);
1274         return r;
1275 }
1276
1277 /**
1278  * prcmu_configure_auto_pm - Configure autonomous power management.
1279  * @sleep: Configuration for ApSleep.
1280  * @idle:  Configuration for ApIdle.
1281  */
1282 void prcmu_configure_auto_pm(struct prcmu_auto_pm_config *sleep,
1283         struct prcmu_auto_pm_config *idle)
1284 {
1285         u32 sleep_cfg;
1286         u32 idle_cfg;
1287         unsigned long flags;
1288
1289         BUG_ON((sleep == NULL) || (idle == NULL));
1290
1291         sleep_cfg = (sleep->sva_auto_pm_enable & 0xF);
1292         sleep_cfg = ((sleep_cfg << 4) | (sleep->sia_auto_pm_enable & 0xF));
1293         sleep_cfg = ((sleep_cfg << 8) | (sleep->sva_power_on & 0xFF));
1294         sleep_cfg = ((sleep_cfg << 8) | (sleep->sia_power_on & 0xFF));
1295         sleep_cfg = ((sleep_cfg << 4) | (sleep->sva_policy & 0xF));
1296         sleep_cfg = ((sleep_cfg << 4) | (sleep->sia_policy & 0xF));
1297
1298         idle_cfg = (idle->sva_auto_pm_enable & 0xF);
1299         idle_cfg = ((idle_cfg << 4) | (idle->sia_auto_pm_enable & 0xF));
1300         idle_cfg = ((idle_cfg << 8) | (idle->sva_power_on & 0xFF));
1301         idle_cfg = ((idle_cfg << 8) | (idle->sia_power_on & 0xFF));
1302         idle_cfg = ((idle_cfg << 4) | (idle->sva_policy & 0xF));
1303         idle_cfg = ((idle_cfg << 4) | (idle->sia_policy & 0xF));
1304
1305         spin_lock_irqsave(&mb2_transfer.auto_pm_lock, flags);
1306
1307         /*
1308          * The autonomous power management configuration is done through
1309          * fields in mailbox 2, but these fields are only used as shared
1310          * variables - i.e. there is no need to send a message.
1311          */
1312         writel(sleep_cfg, (tcdm_base + PRCM_REQ_MB2_AUTO_PM_SLEEP));
1313         writel(idle_cfg, (tcdm_base + PRCM_REQ_MB2_AUTO_PM_IDLE));
1314
1315         mb2_transfer.auto_pm_enabled =
1316                 ((sleep->sva_auto_pm_enable == PRCMU_AUTO_PM_ON) ||
1317                  (sleep->sia_auto_pm_enable == PRCMU_AUTO_PM_ON) ||
1318                  (idle->sva_auto_pm_enable == PRCMU_AUTO_PM_ON) ||
1319                  (idle->sia_auto_pm_enable == PRCMU_AUTO_PM_ON));
1320
1321         spin_unlock_irqrestore(&mb2_transfer.auto_pm_lock, flags);
1322 }
1323 EXPORT_SYMBOL(prcmu_configure_auto_pm);
1324
1325 bool prcmu_is_auto_pm_enabled(void)
1326 {
1327         return mb2_transfer.auto_pm_enabled;
1328 }
1329
1330 static int request_sysclk(bool enable)
1331 {
1332         int r;
1333         unsigned long flags;
1334
1335         r = 0;
1336
1337         mutex_lock(&mb3_transfer.sysclk_lock);
1338
1339         spin_lock_irqsave(&mb3_transfer.lock, flags);
1340
1341         while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(3))
1342                 cpu_relax();
1343
1344         writeb((enable ? ON : OFF), (tcdm_base + PRCM_REQ_MB3_SYSCLK_MGT));
1345
1346         writeb(MB3H_SYSCLK, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB3));
1347         writel(MBOX_BIT(3), PRCM_MBOX_CPU_SET);
1348
1349         spin_unlock_irqrestore(&mb3_transfer.lock, flags);
1350
1351         /*
1352          * The firmware only sends an ACK if we want to enable the
1353          * SysClk, and it succeeds.
1354          */
1355         if (enable && !wait_for_completion_timeout(&mb3_transfer.sysclk_work,
1356                         msecs_to_jiffies(20000))) {
1357                 pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n",
1358                         __func__);
1359                 r = -EIO;
1360         }
1361
1362         mutex_unlock(&mb3_transfer.sysclk_lock);
1363
1364         return r;
1365 }
1366
1367 static int request_timclk(bool enable)
1368 {
1369         u32 val = (PRCM_TCR_DOZE_MODE | PRCM_TCR_TENSEL_MASK);
1370
1371         if (!enable)
1372                 val |= PRCM_TCR_STOP_TIMERS;
1373         writel(val, PRCM_TCR);
1374
1375         return 0;
1376 }
1377
1378 static int request_reg_clock(u8 clock, bool enable)
1379 {
1380         u32 val;
1381         unsigned long flags;
1382
1383         spin_lock_irqsave(&clk_mgt_lock, flags);
1384
1385         /* Grab the HW semaphore. */
1386         while ((readl(PRCM_SEM) & PRCM_SEM_PRCM_SEM) != 0)
1387                 cpu_relax();
1388
1389         val = readl(_PRCMU_BASE + clk_mgt[clock].offset);
1390         if (enable) {
1391                 val |= (PRCM_CLK_MGT_CLKEN | clk_mgt[clock].pllsw);
1392         } else {
1393                 clk_mgt[clock].pllsw = (val & PRCM_CLK_MGT_CLKPLLSW_MASK);
1394                 val &= ~(PRCM_CLK_MGT_CLKEN | PRCM_CLK_MGT_CLKPLLSW_MASK);
1395         }
1396         writel(val, (_PRCMU_BASE + clk_mgt[clock].offset));
1397
1398         /* Release the HW semaphore. */
1399         writel(0, PRCM_SEM);
1400
1401         spin_unlock_irqrestore(&clk_mgt_lock, flags);
1402
1403         return 0;
1404 }
1405
1406 static int request_sga_clock(u8 clock, bool enable)
1407 {
1408         u32 val;
1409         int ret;
1410
1411         if (enable) {
1412                 val = readl(PRCM_CGATING_BYPASS);
1413                 writel(val | PRCM_CGATING_BYPASS_ICN2, PRCM_CGATING_BYPASS);
1414         }
1415
1416         ret = request_reg_clock(clock, enable);
1417
1418         if (!ret && !enable) {
1419                 val = readl(PRCM_CGATING_BYPASS);
1420                 writel(val & ~PRCM_CGATING_BYPASS_ICN2, PRCM_CGATING_BYPASS);
1421         }
1422
1423         return ret;
1424 }
1425
1426 /**
1427  * db8500_prcmu_request_clock() - Request for a clock to be enabled or disabled.
1428  * @clock:      The clock for which the request is made.
1429  * @enable:     Whether the clock should be enabled (true) or disabled (false).
1430  *
1431  * This function should only be used by the clock implementation.
1432  * Do not use it from any other place!
1433  */
1434 int db8500_prcmu_request_clock(u8 clock, bool enable)
1435 {
1436         if (clock == PRCMU_SGACLK)
1437                 return request_sga_clock(clock, enable);
1438         else if (clock < PRCMU_NUM_REG_CLOCKS)
1439                 return request_reg_clock(clock, enable);
1440         else if (clock == PRCMU_TIMCLK)
1441                 return request_timclk(enable);
1442         else if (clock == PRCMU_SYSCLK)
1443                 return request_sysclk(enable);
1444         else if (clock == PRCMU_PLLSOC1)
1445                 return request_pll(clock, enable);
1446         else
1447                 return -EINVAL;
1448 }
1449
1450 int db8500_prcmu_config_esram0_deep_sleep(u8 state)
1451 {
1452         if ((state > ESRAM0_DEEP_SLEEP_STATE_RET) ||
1453             (state < ESRAM0_DEEP_SLEEP_STATE_OFF))
1454                 return -EINVAL;
1455
1456         mutex_lock(&mb4_transfer.lock);
1457
1458         while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(4))
1459                 cpu_relax();
1460
1461         writeb(MB4H_MEM_ST, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4));
1462         writeb(((DDR_PWR_STATE_OFFHIGHLAT << 4) | DDR_PWR_STATE_ON),
1463                (tcdm_base + PRCM_REQ_MB4_DDR_ST_AP_SLEEP_IDLE));
1464         writeb(DDR_PWR_STATE_ON,
1465                (tcdm_base + PRCM_REQ_MB4_DDR_ST_AP_DEEP_IDLE));
1466         writeb(state, (tcdm_base + PRCM_REQ_MB4_ESRAM0_ST));
1467
1468         writel(MBOX_BIT(4), PRCM_MBOX_CPU_SET);
1469         wait_for_completion(&mb4_transfer.work);
1470
1471         mutex_unlock(&mb4_transfer.lock);
1472
1473         return 0;
1474 }
1475
1476 int prcmu_config_hotdog(u8 threshold)
1477 {
1478         mutex_lock(&mb4_transfer.lock);
1479
1480         while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(4))
1481                 cpu_relax();
1482
1483         writeb(threshold, (tcdm_base + PRCM_REQ_MB4_HOTDOG_THRESHOLD));
1484         writeb(MB4H_HOTDOG, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4));
1485
1486         writel(MBOX_BIT(4), PRCM_MBOX_CPU_SET);
1487         wait_for_completion(&mb4_transfer.work);
1488
1489         mutex_unlock(&mb4_transfer.lock);
1490
1491         return 0;
1492 }
1493
1494 int prcmu_config_hotmon(u8 low, u8 high)
1495 {
1496         mutex_lock(&mb4_transfer.lock);
1497
1498         while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(4))
1499                 cpu_relax();
1500
1501         writeb(low, (tcdm_base + PRCM_REQ_MB4_HOTMON_LOW));
1502         writeb(high, (tcdm_base + PRCM_REQ_MB4_HOTMON_HIGH));
1503         writeb((HOTMON_CONFIG_LOW | HOTMON_CONFIG_HIGH),
1504                 (tcdm_base + PRCM_REQ_MB4_HOTMON_CONFIG));
1505         writeb(MB4H_HOTMON, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4));
1506
1507         writel(MBOX_BIT(4), PRCM_MBOX_CPU_SET);
1508         wait_for_completion(&mb4_transfer.work);
1509
1510         mutex_unlock(&mb4_transfer.lock);
1511
1512         return 0;
1513 }
1514
1515 static int config_hot_period(u16 val)
1516 {
1517         mutex_lock(&mb4_transfer.lock);
1518
1519         while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(4))
1520                 cpu_relax();
1521
1522         writew(val, (tcdm_base + PRCM_REQ_MB4_HOT_PERIOD));
1523         writeb(MB4H_HOT_PERIOD, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4));
1524
1525         writel(MBOX_BIT(4), PRCM_MBOX_CPU_SET);
1526         wait_for_completion(&mb4_transfer.work);
1527
1528         mutex_unlock(&mb4_transfer.lock);
1529
1530         return 0;
1531 }
1532
1533 int prcmu_start_temp_sense(u16 cycles32k)
1534 {
1535         if (cycles32k == 0xFFFF)
1536                 return -EINVAL;
1537
1538         return config_hot_period(cycles32k);
1539 }
1540
1541 int prcmu_stop_temp_sense(void)
1542 {
1543         return config_hot_period(0xFFFF);
1544 }
1545
1546 static int prcmu_a9wdog(u8 cmd, u8 d0, u8 d1, u8 d2, u8 d3)
1547 {
1548
1549         mutex_lock(&mb4_transfer.lock);
1550
1551         while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(4))
1552                 cpu_relax();
1553
1554         writeb(d0, (tcdm_base + PRCM_REQ_MB4_A9WDOG_0));
1555         writeb(d1, (tcdm_base + PRCM_REQ_MB4_A9WDOG_1));
1556         writeb(d2, (tcdm_base + PRCM_REQ_MB4_A9WDOG_2));
1557         writeb(d3, (tcdm_base + PRCM_REQ_MB4_A9WDOG_3));
1558
1559         writeb(cmd, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4));
1560
1561         writel(MBOX_BIT(4), PRCM_MBOX_CPU_SET);
1562         wait_for_completion(&mb4_transfer.work);
1563
1564         mutex_unlock(&mb4_transfer.lock);
1565
1566         return 0;
1567
1568 }
1569
1570 int prcmu_config_a9wdog(u8 num, bool sleep_auto_off)
1571 {
1572         BUG_ON(num == 0 || num > 0xf);
1573         return prcmu_a9wdog(MB4H_A9WDOG_CONF, num, 0, 0,
1574                             sleep_auto_off ? A9WDOG_AUTO_OFF_EN :
1575                             A9WDOG_AUTO_OFF_DIS);
1576 }
1577
1578 int prcmu_enable_a9wdog(u8 id)
1579 {
1580         return prcmu_a9wdog(MB4H_A9WDOG_EN, id, 0, 0, 0);
1581 }
1582
1583 int prcmu_disable_a9wdog(u8 id)
1584 {
1585         return prcmu_a9wdog(MB4H_A9WDOG_DIS, id, 0, 0, 0);
1586 }
1587
1588 int prcmu_kick_a9wdog(u8 id)
1589 {
1590         return prcmu_a9wdog(MB4H_A9WDOG_KICK, id, 0, 0, 0);
1591 }
1592
1593 /*
1594  * timeout is 28 bit, in ms.
1595  */
1596 #define MAX_WATCHDOG_TIMEOUT 131000
1597 int prcmu_load_a9wdog(u8 id, u32 timeout)
1598 {
1599         if (timeout > MAX_WATCHDOG_TIMEOUT)
1600                 /*
1601                  * Due to calculation bug in prcmu fw, timeouts
1602                  * can't be bigger than 131 seconds.
1603                  */
1604                 return -EINVAL;
1605
1606         return prcmu_a9wdog(MB4H_A9WDOG_LOAD,
1607                             (id & A9WDOG_ID_MASK) |
1608                             /*
1609                              * Put the lowest 28 bits of timeout at
1610                              * offset 4. Four first bits are used for id.
1611                              */
1612                             (u8)((timeout << 4) & 0xf0),
1613                             (u8)((timeout >> 4) & 0xff),
1614                             (u8)((timeout >> 12) & 0xff),
1615                             (u8)((timeout >> 20) & 0xff));
1616 }
1617
1618 /**
1619  * prcmu_set_clock_divider() - Configure the clock divider.
1620  * @clock:      The clock for which the request is made.
1621  * @divider:    The clock divider. (< 32)
1622  *
1623  * This function should only be used by the clock implementation.
1624  * Do not use it from any other place!
1625  */
1626 int prcmu_set_clock_divider(u8 clock, u8 divider)
1627 {
1628         u32 val;
1629         unsigned long flags;
1630
1631         if ((clock >= PRCMU_NUM_REG_CLOCKS) || (divider < 1) || (31 < divider))
1632                 return -EINVAL;
1633
1634         spin_lock_irqsave(&clk_mgt_lock, flags);
1635
1636         /* Grab the HW semaphore. */
1637         while ((readl(PRCM_SEM) & PRCM_SEM_PRCM_SEM) != 0)
1638                 cpu_relax();
1639
1640         val = readl(_PRCMU_BASE + clk_mgt[clock].offset);
1641         val &= ~(PRCM_CLK_MGT_CLKPLLDIV_MASK);
1642         val |= (u32)divider;
1643         writel(val, (_PRCMU_BASE + clk_mgt[clock].offset));
1644
1645         /* Release the HW semaphore. */
1646         writel(0, PRCM_SEM);
1647
1648         spin_unlock_irqrestore(&clk_mgt_lock, flags);
1649
1650         return 0;
1651 }
1652
1653 /**
1654  * prcmu_abb_read() - Read register value(s) from the ABB.
1655  * @slave:      The I2C slave address.
1656  * @reg:        The (start) register address.
1657  * @value:      The read out value(s).
1658  * @size:       The number of registers to read.
1659  *
1660  * Reads register value(s) from the ABB.
1661  * @size has to be 1 for the current firmware version.
1662  */
1663 int prcmu_abb_read(u8 slave, u8 reg, u8 *value, u8 size)
1664 {
1665         int r;
1666
1667         if (size != 1)
1668                 return -EINVAL;
1669
1670         mutex_lock(&mb5_transfer.lock);
1671
1672         while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(5))
1673                 cpu_relax();
1674
1675         writeb(PRCMU_I2C_READ(slave), (tcdm_base + PRCM_REQ_MB5_I2C_SLAVE_OP));
1676         writeb(PRCMU_I2C_STOP_EN, (tcdm_base + PRCM_REQ_MB5_I2C_HW_BITS));
1677         writeb(reg, (tcdm_base + PRCM_REQ_MB5_I2C_REG));
1678         writeb(0, (tcdm_base + PRCM_REQ_MB5_I2C_VAL));
1679
1680         writel(MBOX_BIT(5), PRCM_MBOX_CPU_SET);
1681
1682         if (!wait_for_completion_timeout(&mb5_transfer.work,
1683                                 msecs_to_jiffies(20000))) {
1684                 pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n",
1685                         __func__);
1686                 r = -EIO;
1687         } else {
1688                 r = ((mb5_transfer.ack.status == I2C_RD_OK) ? 0 : -EIO);
1689         }
1690
1691         if (!r)
1692                 *value = mb5_transfer.ack.value;
1693
1694         mutex_unlock(&mb5_transfer.lock);
1695
1696         return r;
1697 }
1698
1699 /**
1700  * prcmu_abb_write() - Write register value(s) to the ABB.
1701  * @slave:      The I2C slave address.
1702  * @reg:        The (start) register address.
1703  * @value:      The value(s) to write.
1704  * @size:       The number of registers to write.
1705  *
1706  * Reads register value(s) from the ABB.
1707  * @size has to be 1 for the current firmware version.
1708  */
1709 int prcmu_abb_write(u8 slave, u8 reg, u8 *value, u8 size)
1710 {
1711         int r;
1712
1713         if (size != 1)
1714                 return -EINVAL;
1715
1716         mutex_lock(&mb5_transfer.lock);
1717
1718         while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(5))
1719                 cpu_relax();
1720
1721         writeb(PRCMU_I2C_WRITE(slave), (tcdm_base + PRCM_REQ_MB5_I2C_SLAVE_OP));
1722         writeb(PRCMU_I2C_STOP_EN, (tcdm_base + PRCM_REQ_MB5_I2C_HW_BITS));
1723         writeb(reg, (tcdm_base + PRCM_REQ_MB5_I2C_REG));
1724         writeb(*value, (tcdm_base + PRCM_REQ_MB5_I2C_VAL));
1725
1726         writel(MBOX_BIT(5), PRCM_MBOX_CPU_SET);
1727
1728         if (!wait_for_completion_timeout(&mb5_transfer.work,
1729                                 msecs_to_jiffies(20000))) {
1730                 pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n",
1731                         __func__);
1732                 r = -EIO;
1733         } else {
1734                 r = ((mb5_transfer.ack.status == I2C_WR_OK) ? 0 : -EIO);
1735         }
1736
1737         mutex_unlock(&mb5_transfer.lock);
1738
1739         return r;
1740 }
1741
1742 /**
1743  * prcmu_ac_wake_req - should be called whenever ARM wants to wakeup Modem
1744  */
1745 void prcmu_ac_wake_req(void)
1746 {
1747         u32 val;
1748         u32 status;
1749
1750         mutex_lock(&mb0_transfer.ac_wake_lock);
1751
1752         val = readl(PRCM_HOSTACCESS_REQ);
1753         if (val & PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ)
1754                 goto unlock_and_return;
1755
1756         atomic_set(&ac_wake_req_state, 1);
1757
1758 retry:
1759         writel((val | PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ), PRCM_HOSTACCESS_REQ);
1760
1761         if (!wait_for_completion_timeout(&mb0_transfer.ac_wake_work,
1762                         msecs_to_jiffies(5000))) {
1763                 panic("prcmu: %s timed out (5 s) waiting for a reply.\n",
1764                         __func__);
1765                 goto unlock_and_return;
1766         }
1767
1768         /*
1769          * The modem can generate an AC_WAKE_ACK, and then still go to sleep.
1770          * As a workaround, we wait, and then check that the modem is indeed
1771          * awake (in terms of the value of the PRCM_MOD_AWAKE_STATUS
1772          * register, which may not be the whole truth).
1773          */
1774         udelay(400);
1775         status = (readl(PRCM_MOD_AWAKE_STATUS) & BITS(0, 2));
1776         if (status != (PRCM_MOD_AWAKE_STATUS_PRCM_MOD_AAPD_AWAKE |
1777                         PRCM_MOD_AWAKE_STATUS_PRCM_MOD_COREPD_AWAKE)) {
1778                 pr_err("prcmu: %s received ack, but modem not awake (0x%X).\n",
1779                         __func__, status);
1780                 udelay(1200);
1781                 writel(val, PRCM_HOSTACCESS_REQ);
1782                 if (wait_for_completion_timeout(&mb0_transfer.ac_wake_work,
1783                                 msecs_to_jiffies(5000)))
1784                         goto retry;
1785                 panic("prcmu: %s timed out (5 s) waiting for AC_SLEEP_ACK.\n",
1786                         __func__);
1787         }
1788
1789 unlock_and_return:
1790         mutex_unlock(&mb0_transfer.ac_wake_lock);
1791 }
1792
1793 /**
1794  * prcmu_ac_sleep_req - called when ARM no longer needs to talk to modem
1795  */
1796 void prcmu_ac_sleep_req()
1797 {
1798         u32 val;
1799
1800         mutex_lock(&mb0_transfer.ac_wake_lock);
1801
1802         val = readl(PRCM_HOSTACCESS_REQ);
1803         if (!(val & PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ))
1804                 goto unlock_and_return;
1805
1806         writel((val & ~PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ),
1807                 PRCM_HOSTACCESS_REQ);
1808
1809         if (!wait_for_completion_timeout(&mb0_transfer.ac_wake_work,
1810                         msecs_to_jiffies(5000))) {
1811                 panic("prcmu: %s timed out (5 s) waiting for a reply.\n",
1812                         __func__);
1813         }
1814
1815         atomic_set(&ac_wake_req_state, 0);
1816
1817 unlock_and_return:
1818         mutex_unlock(&mb0_transfer.ac_wake_lock);
1819 }
1820
1821 bool db8500_prcmu_is_ac_wake_requested(void)
1822 {
1823         return (atomic_read(&ac_wake_req_state) != 0);
1824 }
1825
1826 /**
1827  * db8500_prcmu_system_reset - System reset
1828  *
1829  * Saves the reset reason code and then sets the APE_SOFTRST register which
1830  * fires interrupt to fw
1831  */
1832 void db8500_prcmu_system_reset(u16 reset_code)
1833 {
1834         writew(reset_code, (tcdm_base + PRCM_SW_RST_REASON));
1835         writel(1, PRCM_APE_SOFTRST);
1836 }
1837
1838 /**
1839  * db8500_prcmu_get_reset_code - Retrieve SW reset reason code
1840  *
1841  * Retrieves the reset reason code stored by prcmu_system_reset() before
1842  * last restart.
1843  */
1844 u16 db8500_prcmu_get_reset_code(void)
1845 {
1846         return readw(tcdm_base + PRCM_SW_RST_REASON);
1847 }
1848
1849 /**
1850  * prcmu_reset_modem - ask the PRCMU to reset modem
1851  */
1852 void prcmu_modem_reset(void)
1853 {
1854         mutex_lock(&mb1_transfer.lock);
1855
1856         while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(1))
1857                 cpu_relax();
1858
1859         writeb(MB1H_RESET_MODEM, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1));
1860         writel(MBOX_BIT(1), PRCM_MBOX_CPU_SET);
1861         wait_for_completion(&mb1_transfer.work);
1862
1863         /*
1864          * No need to check return from PRCMU as modem should go in reset state
1865          * This state is already managed by upper layer
1866          */
1867
1868         mutex_unlock(&mb1_transfer.lock);
1869 }
1870
1871 static void ack_dbb_wakeup(void)
1872 {
1873         unsigned long flags;
1874
1875         spin_lock_irqsave(&mb0_transfer.lock, flags);
1876
1877         while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(0))
1878                 cpu_relax();
1879
1880         writeb(MB0H_READ_WAKEUP_ACK, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB0));
1881         writel(MBOX_BIT(0), PRCM_MBOX_CPU_SET);
1882
1883         spin_unlock_irqrestore(&mb0_transfer.lock, flags);
1884 }
1885
1886 static inline void print_unknown_header_warning(u8 n, u8 header)
1887 {
1888         pr_warning("prcmu: Unknown message header (%d) in mailbox %d.\n",
1889                 header, n);
1890 }
1891
1892 static bool read_mailbox_0(void)
1893 {
1894         bool r;
1895         u32 ev;
1896         unsigned int n;
1897         u8 header;
1898
1899         header = readb(tcdm_base + PRCM_MBOX_HEADER_ACK_MB0);
1900         switch (header) {
1901         case MB0H_WAKEUP_EXE:
1902         case MB0H_WAKEUP_SLEEP:
1903                 if (readb(tcdm_base + PRCM_ACK_MB0_READ_POINTER) & 1)
1904                         ev = readl(tcdm_base + PRCM_ACK_MB0_WAKEUP_1_8500);
1905                 else
1906                         ev = readl(tcdm_base + PRCM_ACK_MB0_WAKEUP_0_8500);
1907
1908                 if (ev & (WAKEUP_BIT_AC_WAKE_ACK | WAKEUP_BIT_AC_SLEEP_ACK))
1909                         complete(&mb0_transfer.ac_wake_work);
1910                 if (ev & WAKEUP_BIT_SYSCLK_OK)
1911                         complete(&mb3_transfer.sysclk_work);
1912
1913                 ev &= mb0_transfer.req.dbb_irqs;
1914
1915                 for (n = 0; n < NUM_PRCMU_WAKEUPS; n++) {
1916                         if (ev & prcmu_irq_bit[n])
1917                                 generic_handle_irq(IRQ_PRCMU_BASE + n);
1918                 }
1919                 r = true;
1920                 break;
1921         default:
1922                 print_unknown_header_warning(0, header);
1923                 r = false;
1924                 break;
1925         }
1926         writel(MBOX_BIT(0), PRCM_ARM_IT1_CLR);
1927         return r;
1928 }
1929
1930 static bool read_mailbox_1(void)
1931 {
1932         mb1_transfer.ack.header = readb(tcdm_base + PRCM_MBOX_HEADER_REQ_MB1);
1933         mb1_transfer.ack.arm_opp = readb(tcdm_base +
1934                 PRCM_ACK_MB1_CURRENT_ARM_OPP);
1935         mb1_transfer.ack.ape_opp = readb(tcdm_base +
1936                 PRCM_ACK_MB1_CURRENT_APE_OPP);
1937         mb1_transfer.ack.ape_voltage_status = readb(tcdm_base +
1938                 PRCM_ACK_MB1_APE_VOLTAGE_STATUS);
1939         writel(MBOX_BIT(1), PRCM_ARM_IT1_CLR);
1940         complete(&mb1_transfer.work);
1941         return false;
1942 }
1943
1944 static bool read_mailbox_2(void)
1945 {
1946         mb2_transfer.ack.status = readb(tcdm_base + PRCM_ACK_MB2_DPS_STATUS);
1947         writel(MBOX_BIT(2), PRCM_ARM_IT1_CLR);
1948         complete(&mb2_transfer.work);
1949         return false;
1950 }
1951
1952 static bool read_mailbox_3(void)
1953 {
1954         writel(MBOX_BIT(3), PRCM_ARM_IT1_CLR);
1955         return false;
1956 }
1957
1958 static bool read_mailbox_4(void)
1959 {
1960         u8 header;
1961         bool do_complete = true;
1962
1963         header = readb(tcdm_base + PRCM_MBOX_HEADER_REQ_MB4);
1964         switch (header) {
1965         case MB4H_MEM_ST:
1966         case MB4H_HOTDOG:
1967         case MB4H_HOTMON:
1968         case MB4H_HOT_PERIOD:
1969         case MB4H_A9WDOG_CONF:
1970         case MB4H_A9WDOG_EN:
1971         case MB4H_A9WDOG_DIS:
1972         case MB4H_A9WDOG_LOAD:
1973         case MB4H_A9WDOG_KICK:
1974                 break;
1975         default:
1976                 print_unknown_header_warning(4, header);
1977                 do_complete = false;
1978                 break;
1979         }
1980
1981         writel(MBOX_BIT(4), PRCM_ARM_IT1_CLR);
1982
1983         if (do_complete)
1984                 complete(&mb4_transfer.work);
1985
1986         return false;
1987 }
1988
1989 static bool read_mailbox_5(void)
1990 {
1991         mb5_transfer.ack.status = readb(tcdm_base + PRCM_ACK_MB5_I2C_STATUS);
1992         mb5_transfer.ack.value = readb(tcdm_base + PRCM_ACK_MB5_I2C_VAL);
1993         writel(MBOX_BIT(5), PRCM_ARM_IT1_CLR);
1994         complete(&mb5_transfer.work);
1995         return false;
1996 }
1997
1998 static bool read_mailbox_6(void)
1999 {
2000         writel(MBOX_BIT(6), PRCM_ARM_IT1_CLR);
2001         return false;
2002 }
2003
2004 static bool read_mailbox_7(void)
2005 {
2006         writel(MBOX_BIT(7), PRCM_ARM_IT1_CLR);
2007         return false;
2008 }
2009
2010 static bool (* const read_mailbox[NUM_MB])(void) = {
2011         read_mailbox_0,
2012         read_mailbox_1,
2013         read_mailbox_2,
2014         read_mailbox_3,
2015         read_mailbox_4,
2016         read_mailbox_5,
2017         read_mailbox_6,
2018         read_mailbox_7
2019 };
2020
2021 static irqreturn_t prcmu_irq_handler(int irq, void *data)
2022 {
2023         u32 bits;
2024         u8 n;
2025         irqreturn_t r;
2026
2027         bits = (readl(PRCM_ARM_IT1_VAL) & ALL_MBOX_BITS);
2028         if (unlikely(!bits))
2029                 return IRQ_NONE;
2030
2031         r = IRQ_HANDLED;
2032         for (n = 0; bits; n++) {
2033                 if (bits & MBOX_BIT(n)) {
2034                         bits -= MBOX_BIT(n);
2035                         if (read_mailbox[n]())
2036                                 r = IRQ_WAKE_THREAD;
2037                 }
2038         }
2039         return r;
2040 }
2041
2042 static irqreturn_t prcmu_irq_thread_fn(int irq, void *data)
2043 {
2044         ack_dbb_wakeup();
2045         return IRQ_HANDLED;
2046 }
2047
2048 static void prcmu_mask_work(struct work_struct *work)
2049 {
2050         unsigned long flags;
2051
2052         spin_lock_irqsave(&mb0_transfer.lock, flags);
2053
2054         config_wakeups();
2055
2056         spin_unlock_irqrestore(&mb0_transfer.lock, flags);
2057 }
2058
2059 static void prcmu_irq_mask(struct irq_data *d)
2060 {
2061         unsigned long flags;
2062
2063         spin_lock_irqsave(&mb0_transfer.dbb_irqs_lock, flags);
2064
2065         mb0_transfer.req.dbb_irqs &= ~prcmu_irq_bit[d->irq - IRQ_PRCMU_BASE];
2066
2067         spin_unlock_irqrestore(&mb0_transfer.dbb_irqs_lock, flags);
2068
2069         if (d->irq != IRQ_PRCMU_CA_SLEEP)
2070                 schedule_work(&mb0_transfer.mask_work);
2071 }
2072
2073 static void prcmu_irq_unmask(struct irq_data *d)
2074 {
2075         unsigned long flags;
2076
2077         spin_lock_irqsave(&mb0_transfer.dbb_irqs_lock, flags);
2078
2079         mb0_transfer.req.dbb_irqs |= prcmu_irq_bit[d->irq - IRQ_PRCMU_BASE];
2080
2081         spin_unlock_irqrestore(&mb0_transfer.dbb_irqs_lock, flags);
2082
2083         if (d->irq != IRQ_PRCMU_CA_SLEEP)
2084                 schedule_work(&mb0_transfer.mask_work);
2085 }
2086
2087 static void noop(struct irq_data *d)
2088 {
2089 }
2090
2091 static struct irq_chip prcmu_irq_chip = {
2092         .name           = "prcmu",
2093         .irq_disable    = prcmu_irq_mask,
2094         .irq_ack        = noop,
2095         .irq_mask       = prcmu_irq_mask,
2096         .irq_unmask     = prcmu_irq_unmask,
2097 };
2098
2099 void __init db8500_prcmu_early_init(void)
2100 {
2101         unsigned int i;
2102
2103         if (cpu_is_u8500v1()) {
2104                 tcdm_base = __io_address(U8500_PRCMU_TCDM_BASE_V1);
2105         } else if (cpu_is_u8500v2()) {
2106                 void *tcpm_base = ioremap_nocache(U8500_PRCMU_TCPM_BASE, SZ_4K);
2107
2108                 if (tcpm_base != NULL) {
2109                         int version;
2110                         version = readl(tcpm_base + PRCMU_FW_VERSION_OFFSET);
2111                         prcmu_version.project_number = version & 0xFF;
2112                         prcmu_version.api_version = (version >> 8) & 0xFF;
2113                         prcmu_version.func_version = (version >> 16) & 0xFF;
2114                         prcmu_version.errata = (version >> 24) & 0xFF;
2115                         pr_info("PRCMU firmware version %d.%d.%d\n",
2116                                 (version >> 8) & 0xFF, (version >> 16) & 0xFF,
2117                                 (version >> 24) & 0xFF);
2118                         iounmap(tcpm_base);
2119                 }
2120
2121                 tcdm_base = __io_address(U8500_PRCMU_TCDM_BASE);
2122         } else {
2123                 pr_err("prcmu: Unsupported chip version\n");
2124                 BUG();
2125         }
2126
2127         spin_lock_init(&mb0_transfer.lock);
2128         spin_lock_init(&mb0_transfer.dbb_irqs_lock);
2129         mutex_init(&mb0_transfer.ac_wake_lock);
2130         init_completion(&mb0_transfer.ac_wake_work);
2131         mutex_init(&mb1_transfer.lock);
2132         init_completion(&mb1_transfer.work);
2133         mutex_init(&mb2_transfer.lock);
2134         init_completion(&mb2_transfer.work);
2135         spin_lock_init(&mb2_transfer.auto_pm_lock);
2136         spin_lock_init(&mb3_transfer.lock);
2137         mutex_init(&mb3_transfer.sysclk_lock);
2138         init_completion(&mb3_transfer.sysclk_work);
2139         mutex_init(&mb4_transfer.lock);
2140         init_completion(&mb4_transfer.work);
2141         mutex_init(&mb5_transfer.lock);
2142         init_completion(&mb5_transfer.work);
2143
2144         INIT_WORK(&mb0_transfer.mask_work, prcmu_mask_work);
2145
2146         /* Initalize irqs. */
2147         for (i = 0; i < NUM_PRCMU_WAKEUPS; i++) {
2148                 unsigned int irq;
2149
2150                 irq = IRQ_PRCMU_BASE + i;
2151                 irq_set_chip_and_handler(irq, &prcmu_irq_chip,
2152                                          handle_simple_irq);
2153                 set_irq_flags(irq, IRQF_VALID);
2154         }
2155 }
2156
2157 static void __init init_prcm_registers(void)
2158 {
2159         u32 val;
2160
2161         val = readl(PRCM_A9PL_FORCE_CLKEN);
2162         val &= ~(PRCM_A9PL_FORCE_CLKEN_PRCM_A9PL_FORCE_CLKEN |
2163                 PRCM_A9PL_FORCE_CLKEN_PRCM_A9AXI_FORCE_CLKEN);
2164         writel(val, (PRCM_A9PL_FORCE_CLKEN));
2165 }
2166
2167 /*
2168  * Power domain switches (ePODs) modeled as regulators for the DB8500 SoC
2169  */
2170 static struct regulator_consumer_supply db8500_vape_consumers[] = {
2171         REGULATOR_SUPPLY("v-ape", NULL),
2172         REGULATOR_SUPPLY("v-i2c", "nmk-i2c.0"),
2173         REGULATOR_SUPPLY("v-i2c", "nmk-i2c.1"),
2174         REGULATOR_SUPPLY("v-i2c", "nmk-i2c.2"),
2175         REGULATOR_SUPPLY("v-i2c", "nmk-i2c.3"),
2176         /* "v-mmc" changed to "vcore" in the mainline kernel */
2177         REGULATOR_SUPPLY("vcore", "sdi0"),
2178         REGULATOR_SUPPLY("vcore", "sdi1"),
2179         REGULATOR_SUPPLY("vcore", "sdi2"),
2180         REGULATOR_SUPPLY("vcore", "sdi3"),
2181         REGULATOR_SUPPLY("vcore", "sdi4"),
2182         REGULATOR_SUPPLY("v-dma", "dma40.0"),
2183         REGULATOR_SUPPLY("v-ape", "ab8500-usb.0"),
2184         /* "v-uart" changed to "vcore" in the mainline kernel */
2185         REGULATOR_SUPPLY("vcore", "uart0"),
2186         REGULATOR_SUPPLY("vcore", "uart1"),
2187         REGULATOR_SUPPLY("vcore", "uart2"),
2188         REGULATOR_SUPPLY("v-ape", "nmk-ske-keypad.0"),
2189 };
2190
2191 static struct regulator_consumer_supply db8500_vsmps2_consumers[] = {
2192         /* CG2900 and CW1200 power to off-chip peripherals */
2193         REGULATOR_SUPPLY("gbf_1v8", "cg2900-uart.0"),
2194         REGULATOR_SUPPLY("wlan_1v8", "cw1200.0"),
2195         REGULATOR_SUPPLY("musb_1v8", "ab8500-usb.0"),
2196         /* AV8100 regulator */
2197         REGULATOR_SUPPLY("hdmi_1v8", "0-0070"),
2198 };
2199
2200 static struct regulator_consumer_supply db8500_b2r2_mcde_consumers[] = {
2201         REGULATOR_SUPPLY("vsupply", "b2r2.0"),
2202         REGULATOR_SUPPLY("vsupply", "mcde.0"),
2203 };
2204
2205 static struct regulator_init_data db8500_regulators[DB8500_NUM_REGULATORS] = {
2206         [DB8500_REGULATOR_VAPE] = {
2207                 .constraints = {
2208                         .name = "db8500-vape",
2209                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2210                 },
2211                 .consumer_supplies = db8500_vape_consumers,
2212                 .num_consumer_supplies = ARRAY_SIZE(db8500_vape_consumers),
2213         },
2214         [DB8500_REGULATOR_VARM] = {
2215                 .constraints = {
2216                         .name = "db8500-varm",
2217                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2218                 },
2219         },
2220         [DB8500_REGULATOR_VMODEM] = {
2221                 .constraints = {
2222                         .name = "db8500-vmodem",
2223                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2224                 },
2225         },
2226         [DB8500_REGULATOR_VPLL] = {
2227                 .constraints = {
2228                         .name = "db8500-vpll",
2229                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2230                 },
2231         },
2232         [DB8500_REGULATOR_VSMPS1] = {
2233                 .constraints = {
2234                         .name = "db8500-vsmps1",
2235                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2236                 },
2237         },
2238         [DB8500_REGULATOR_VSMPS2] = {
2239                 .constraints = {
2240                         .name = "db8500-vsmps2",
2241                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2242                 },
2243                 .consumer_supplies = db8500_vsmps2_consumers,
2244                 .num_consumer_supplies = ARRAY_SIZE(db8500_vsmps2_consumers),
2245         },
2246         [DB8500_REGULATOR_VSMPS3] = {
2247                 .constraints = {
2248                         .name = "db8500-vsmps3",
2249                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2250                 },
2251         },
2252         [DB8500_REGULATOR_VRF1] = {
2253                 .constraints = {
2254                         .name = "db8500-vrf1",
2255                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2256                 },
2257         },
2258         [DB8500_REGULATOR_SWITCH_SVAMMDSP] = {
2259                 .supply_regulator = "db8500-vape",
2260                 .constraints = {
2261                         .name = "db8500-sva-mmdsp",
2262                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2263                 },
2264         },
2265         [DB8500_REGULATOR_SWITCH_SVAMMDSPRET] = {
2266                 .constraints = {
2267                         /* "ret" means "retention" */
2268                         .name = "db8500-sva-mmdsp-ret",
2269                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2270                 },
2271         },
2272         [DB8500_REGULATOR_SWITCH_SVAPIPE] = {
2273                 .supply_regulator = "db8500-vape",
2274                 .constraints = {
2275                         .name = "db8500-sva-pipe",
2276                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2277                 },
2278         },
2279         [DB8500_REGULATOR_SWITCH_SIAMMDSP] = {
2280                 .supply_regulator = "db8500-vape",
2281                 .constraints = {
2282                         .name = "db8500-sia-mmdsp",
2283                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2284                 },
2285         },
2286         [DB8500_REGULATOR_SWITCH_SIAMMDSPRET] = {
2287                 .constraints = {
2288                         .name = "db8500-sia-mmdsp-ret",
2289                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2290                 },
2291         },
2292         [DB8500_REGULATOR_SWITCH_SIAPIPE] = {
2293                 .supply_regulator = "db8500-vape",
2294                 .constraints = {
2295                         .name = "db8500-sia-pipe",
2296                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2297                 },
2298         },
2299         [DB8500_REGULATOR_SWITCH_SGA] = {
2300                 .supply_regulator = "db8500-vape",
2301                 .constraints = {
2302                         .name = "db8500-sga",
2303                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2304                 },
2305         },
2306         [DB8500_REGULATOR_SWITCH_B2R2_MCDE] = {
2307                 .supply_regulator = "db8500-vape",
2308                 .constraints = {
2309                         .name = "db8500-b2r2-mcde",
2310                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2311                 },
2312                 .consumer_supplies = db8500_b2r2_mcde_consumers,
2313                 .num_consumer_supplies = ARRAY_SIZE(db8500_b2r2_mcde_consumers),
2314         },
2315         [DB8500_REGULATOR_SWITCH_ESRAM12] = {
2316                 .supply_regulator = "db8500-vape",
2317                 .constraints = {
2318                         .name = "db8500-esram12",
2319                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2320                 },
2321         },
2322         [DB8500_REGULATOR_SWITCH_ESRAM12RET] = {
2323                 .constraints = {
2324                         .name = "db8500-esram12-ret",
2325                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2326                 },
2327         },
2328         [DB8500_REGULATOR_SWITCH_ESRAM34] = {
2329                 .supply_regulator = "db8500-vape",
2330                 .constraints = {
2331                         .name = "db8500-esram34",
2332                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2333                 },
2334         },
2335         [DB8500_REGULATOR_SWITCH_ESRAM34RET] = {
2336                 .constraints = {
2337                         .name = "db8500-esram34-ret",
2338                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
2339                 },
2340         },
2341 };
2342
2343 static struct mfd_cell db8500_prcmu_devs[] = {
2344         {
2345                 .name = "db8500-prcmu-regulators",
2346                 .platform_data = &db8500_regulators,
2347                 .pdata_size = sizeof(db8500_regulators),
2348         },
2349         {
2350                 .name = "cpufreq-u8500",
2351         },
2352 };
2353
2354 /**
2355  * prcmu_fw_init - arch init call for the Linux PRCMU fw init logic
2356  *
2357  */
2358 static int __init db8500_prcmu_probe(struct platform_device *pdev)
2359 {
2360         int err = 0;
2361
2362         if (ux500_is_svp())
2363                 return -ENODEV;
2364
2365         init_prcm_registers();
2366
2367         /* Clean up the mailbox interrupts after pre-kernel code. */
2368         writel(ALL_MBOX_BITS, PRCM_ARM_IT1_CLR);
2369
2370         err = request_threaded_irq(IRQ_DB8500_PRCMU1, prcmu_irq_handler,
2371                 prcmu_irq_thread_fn, IRQF_NO_SUSPEND, "prcmu", NULL);
2372         if (err < 0) {
2373                 pr_err("prcmu: Failed to allocate IRQ_DB8500_PRCMU1.\n");
2374                 err = -EBUSY;
2375                 goto no_irq_return;
2376         }
2377
2378         if (cpu_is_u8500v20_or_later())
2379                 prcmu_config_esram0_deep_sleep(ESRAM0_DEEP_SLEEP_STATE_RET);
2380
2381         err = mfd_add_devices(&pdev->dev, 0, db8500_prcmu_devs,
2382                               ARRAY_SIZE(db8500_prcmu_devs), NULL,
2383                               0);
2384
2385         if (err)
2386                 pr_err("prcmu: Failed to add subdevices\n");
2387         else
2388                 pr_info("DB8500 PRCMU initialized\n");
2389
2390 no_irq_return:
2391         return err;
2392 }
2393
2394 static struct platform_driver db8500_prcmu_driver = {
2395         .driver = {
2396                 .name = "db8500-prcmu",
2397                 .owner = THIS_MODULE,
2398         },
2399 };
2400
2401 static int __init db8500_prcmu_init(void)
2402 {
2403         return platform_driver_probe(&db8500_prcmu_driver, db8500_prcmu_probe);
2404 }
2405
2406 arch_initcall(db8500_prcmu_init);
2407
2408 MODULE_AUTHOR("Mattias Nilsson <mattias.i.nilsson@stericsson.com>");
2409 MODULE_DESCRIPTION("DB8500 PRCM Unit driver");
2410 MODULE_LICENSE("GPL v2");