drivers/scsi/ufs/ufshcd.h

   1 /*
   2  * Universal Flash Storage Host controller driver
   3  *
   4  * This code is based on drivers/scsi/ufs/ufshcd.h
   5  * Copyright (C) 2011-2013 Samsung India Software Operations
   6  *
   7  * Authors:
   8  *      Santosh Yaraganavi <santosh.sy@samsung.com>
   9  *      Vinayak Holikatti <h.vinayak@samsung.com>
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  * See the COPYING file in the top-level directory or visit
  16  * <http://www.gnu.org/licenses/gpl-2.0.html>
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * This program is provided "AS IS" and "WITH ALL FAULTS" and
  24  * without warranty of any kind. You are solely responsible for
  25  * determining the appropriateness of using and distributing
  26  * the program and assume all risks associated with your exercise
  27  * of rights with respect to the program, including but not limited
  28  * to infringement of third party rights, the risks and costs of
  29  * program errors, damage to or loss of data, programs or equipment,
  30  * and unavailability or interruption of operations. Under no
  31  * circumstances will the contributor of this Program be liable for
  32  * any damages of any kind arising from your use or distribution of
  33  * this program.
  34  */
  35
  36 #ifndef _UFSHCD_H
  37 #define _UFSHCD_H
  38
  39 #include <linux/module.h>
  40 #include <linux/kernel.h>
  41 #include <linux/init.h>
  42 #include <linux/interrupt.h>
  43 #include <linux/io.h>
  44 #include <linux/delay.h>
  45 #include <linux/slab.h>
  46 #include <linux/spinlock.h>
  47 #include <linux/workqueue.h>
  48 #include <linux/errno.h>
  49 #include <linux/types.h>
  50 #include <linux/wait.h>
  51 #include <linux/bitops.h>
  52 #include <linux/pm_runtime.h>
  53 #include <linux/clk.h>
  54 #include <linux/completion.h>
  55 #include <linux/regulator/consumer.h>
  56
  57 #include <asm/irq.h>
  58 #include <asm/byteorder.h>
  59 #include <scsi/scsi.h>
  60 #include <scsi/scsi_cmnd.h>
  61 #include <scsi/scsi_host.h>
  62 #include <scsi/scsi_tcq.h>
  63 #include <scsi/scsi_dbg.h>
  64 #include <scsi/scsi_eh.h>
  65
  66 #include "ufs.h"
  67 #include "ufshci.h"
  68
  69 #define UFSHCD "ufshcd"
  70 #define UFSHCD_DRIVER_VERSION "0.2"
  71
  72 struct ufs_hba;
  73
  74 enum dev_cmd_type {
  75         DEV_CMD_TYPE_NOP                = 0x0,
  76         DEV_CMD_TYPE_QUERY              = 0x1,
  77 };
  78
  79 /**
  80  * struct uic_command - UIC command structure
  81  * @command: UIC command
  82  * @argument1: UIC command argument 1
  83  * @argument2: UIC command argument 2
  84  * @argument3: UIC command argument 3
  85  * @cmd_active: Indicate if UIC command is outstanding
  86  * @result: UIC command result
  87  * @done: UIC command completion
  88  */
  89 struct uic_command {
  90         u32 command;
  91         u32 argument1;
  92         u32 argument2;
  93         u32 argument3;
  94         int cmd_active;
  95         int result;
  96         struct completion done;
  97 };
  98
  99 /* Used to differentiate the power management options */
 100 enum ufs_pm_op {
 101         UFS_RUNTIME_PM,
 102         UFS_SYSTEM_PM,
 103         UFS_SHUTDOWN_PM,
 104 };
 105
 106 #define ufshcd_is_runtime_pm(op) ((op) == UFS_RUNTIME_PM)
 107 #define ufshcd_is_system_pm(op) ((op) == UFS_SYSTEM_PM)
 108 #define ufshcd_is_shutdown_pm(op) ((op) == UFS_SHUTDOWN_PM)
 109
 110 /* Host <-> Device UniPro Link state */
 111 enum uic_link_state {
 112         UIC_LINK_OFF_STATE      = 0, /* Link powered down or disabled */
 113         UIC_LINK_ACTIVE_STATE   = 1, /* Link is in Fast/Slow/Sleep state */
 114         UIC_LINK_HIBERN8_STATE  = 2, /* Link is in Hibernate state */
 115 };
 116
 117 #define ufshcd_is_link_off(hba) ((hba)->uic_link_state == UIC_LINK_OFF_STATE)
 118 #define ufshcd_is_link_active(hba) ((hba)->uic_link_state == \
 119                                     UIC_LINK_ACTIVE_STATE)
 120 #define ufshcd_is_link_hibern8(hba) ((hba)->uic_link_state == \
 121                                     UIC_LINK_HIBERN8_STATE)
 122 #define ufshcd_set_link_off(hba) ((hba)->uic_link_state = UIC_LINK_OFF_STATE)
 123 #define ufshcd_set_link_active(hba) ((hba)->uic_link_state = \
 124                                     UIC_LINK_ACTIVE_STATE)
 125 #define ufshcd_set_link_hibern8(hba) ((hba)->uic_link_state = \
 126                                     UIC_LINK_HIBERN8_STATE)
 127
 128 /*
 129  * UFS Power management levels.
 130  * Each level is in increasing order of power savings.
 131  */
 132 enum ufs_pm_level {
 133         UFS_PM_LVL_0, /* UFS_ACTIVE_PWR_MODE, UIC_LINK_ACTIVE_STATE */
 134         UFS_PM_LVL_1, /* UFS_ACTIVE_PWR_MODE, UIC_LINK_HIBERN8_STATE */
 135         UFS_PM_LVL_2, /* UFS_SLEEP_PWR_MODE, UIC_LINK_ACTIVE_STATE */
 136         UFS_PM_LVL_3, /* UFS_SLEEP_PWR_MODE, UIC_LINK_HIBERN8_STATE */
 137         UFS_PM_LVL_4, /* UFS_POWERDOWN_PWR_MODE, UIC_LINK_HIBERN8_STATE */
 138         UFS_PM_LVL_5, /* UFS_POWERDOWN_PWR_MODE, UIC_LINK_OFF_STATE */
 139         UFS_PM_LVL_MAX
 140 };
 141
 142 struct ufs_pm_lvl_states {
 143         enum ufs_dev_pwr_mode dev_state;
 144         enum uic_link_state link_state;
 145 };
 146
 147 /**
 148  * struct ufshcd_lrb - local reference block
 149  * @utr_descriptor_ptr: UTRD address of the command
 150  * @ucd_req_ptr: UCD address of the command
 151  * @ucd_rsp_ptr: Response UPIU address for this command
 152  * @ucd_prdt_ptr: PRDT address of the command
 153  * @cmd: pointer to SCSI command
 154  * @sense_buffer: pointer to sense buffer address of the SCSI command
 155  * @sense_bufflen: Length of the sense buffer
 156  * @scsi_status: SCSI status of the command
 157  * @command_type: SCSI, UFS, Query.
 158  * @task_tag: Task tag of the command
 159  * @lun: LUN of the command
 160  * @intr_cmd: Interrupt command (doesn't participate in interrupt aggregation)
 161  */
 162 struct ufshcd_lrb {
 163         struct utp_transfer_req_desc *utr_descriptor_ptr;
 164         struct utp_upiu_req *ucd_req_ptr;
 165         struct utp_upiu_rsp *ucd_rsp_ptr;
 166         struct ufshcd_sg_entry *ucd_prdt_ptr;
 167
 168         struct scsi_cmnd *cmd;
 169         u8 *sense_buffer;
 170         unsigned int sense_bufflen;
 171         int scsi_status;
 172
 173         int command_type;
 174         int task_tag;
 175         u8 lun; /* UPIU LUN id field is only 8-bit wide */
 176         bool intr_cmd;
 177 };
 178
 179 /**
 180  * struct ufs_query - holds relevent data structures for query request
 181  * @request: request upiu and function
 182  * @descriptor: buffer for sending/receiving descriptor
 183  * @response: response upiu and response
 184  */
 185 struct ufs_query {
 186         struct ufs_query_req request;
 187         u8 *descriptor;
 188         struct ufs_query_res response;
 189 };
 190
 191 /**
 192  * struct ufs_dev_cmd - all assosiated fields with device management commands
 193  * @type: device management command type - Query, NOP OUT
 194  * @lock: lock to allow one command at a time
 195  * @complete: internal commands completion
 196  * @tag_wq: wait queue until free command slot is available
 197  */
 198 struct ufs_dev_cmd {
 199         enum dev_cmd_type type;
 200         struct mutex lock;
 201         struct completion *complete;
 202         wait_queue_head_t tag_wq;
 203         struct ufs_query query;
 204 };
 205
 206 /**
 207  * struct ufs_clk_info - UFS clock related info
 208  * @list: list headed by hba->clk_list_head
 209  * @clk: clock node
 210  * @name: clock name
 211  * @max_freq: maximum frequency supported by the clock
 212  * @min_freq: min frequency that can be used for clock scaling
 213  * @curr_freq: indicates the current frequency that it is set to
 214  * @enabled: variable to check against multiple enable/disable
 215  */
 216 struct ufs_clk_info {
 217         struct list_head list;
 218         struct clk *clk;
 219         const char *name;
 220         u32 max_freq;
 221         u32 min_freq;
 222         u32 curr_freq;
 223         bool enabled;
 224 };
 225
 226 enum ufs_notify_change_status {
 227         PRE_CHANGE,
 228         POST_CHANGE,
 229 };
 230
 231 struct ufs_pa_layer_attr {
 232         u32 gear_rx;
 233         u32 gear_tx;
 234         u32 lane_rx;
 235         u32 lane_tx;
 236         u32 pwr_rx;
 237         u32 pwr_tx;
 238         u32 hs_rate;
 239 };
 240
 241 struct ufs_pwr_mode_info {
 242         bool is_valid;
 243         struct ufs_pa_layer_attr info;
 244 };
 245
 246 /**
 247  * struct ufs_hba_variant_ops - variant specific callbacks
 248  * @name: variant name
 249  * @init: called when the driver is initialized
 250  * @exit: called to cleanup everything done in init
 251  * @get_ufs_hci_version: called to get UFS HCI version
 252  * @clk_scale_notify: notifies that clks are scaled up/down
 253  * @setup_clocks: called before touching any of the controller registers
 254  * @setup_regulators: called before accessing the host controller
 255  * @hce_enable_notify: called before and after HCE enable bit is set to allow
 256  *                     variant specific Uni-Pro initialization.
 257  * @link_startup_notify: called before and after Link startup is carried out
 258  *                       to allow variant specific Uni-Pro initialization.
 259  * @pwr_change_notify: called before and after a power mode change
 260  *                      is carried out to allow vendor spesific capabilities
 261  *                      to be set.
 262  * @suspend: called during host controller PM callback
 263  * @resume: called during host controller PM callback
 264  * @dbg_register_dump: used to dump controller debug information
 265  */
 266 struct ufs_hba_variant_ops {
 267         const char *name;
 268         int     (*init)(struct ufs_hba *);
 269         void    (*exit)(struct ufs_hba *);
 270         u32     (*get_ufs_hci_version)(struct ufs_hba *);
 271         int     (*clk_scale_notify)(struct ufs_hba *, bool,
 272                                     enum ufs_notify_change_status);
 273         int     (*setup_clocks)(struct ufs_hba *, bool);
 274         int     (*setup_regulators)(struct ufs_hba *, bool);
 275         int     (*hce_enable_notify)(struct ufs_hba *,
 276                                      enum ufs_notify_change_status);
 277         int     (*link_startup_notify)(struct ufs_hba *,
 278                                        enum ufs_notify_change_status);
 279         int     (*pwr_change_notify)(struct ufs_hba *,
 280                                         enum ufs_notify_change_status status,
 281                                         struct ufs_pa_layer_attr *,
 282                                         struct ufs_pa_layer_attr *);
 283         int     (*suspend)(struct ufs_hba *, enum ufs_pm_op);
 284         int     (*resume)(struct ufs_hba *, enum ufs_pm_op);
 285         void    (*dbg_register_dump)(struct ufs_hba *hba);
 286 };
 287
 288 /* clock gating state  */
 289 enum clk_gating_state {
 290         CLKS_OFF,
 291         CLKS_ON,
 292         REQ_CLKS_OFF,
 293         REQ_CLKS_ON,
 294 };
 295
 296 /**
 297  * struct ufs_clk_gating - UFS clock gating related info
 298  * @gate_work: worker to turn off clocks after some delay as specified in
 299  * delay_ms
 300  * @ungate_work: worker to turn on clocks that will be used in case of
 301  * interrupt context
 302  * @state: the current clocks state
 303  * @delay_ms: gating delay in ms
 304  * @is_suspended: clk gating is suspended when set to 1 which can be used
 305  * during suspend/resume
 306  * @delay_attr: sysfs attribute to control delay_attr
 307  * @active_reqs: number of requests that are pending and should be waited for
 308  * completion before gating clocks.
 309  */
 310 struct ufs_clk_gating {
 311         struct delayed_work gate_work;
 312         struct work_struct ungate_work;
 313         enum clk_gating_state state;
 314         unsigned long delay_ms;
 315         bool is_suspended;
 316         struct device_attribute delay_attr;
 317         int active_reqs;
 318 };
 319
 320 struct ufs_clk_scaling {
 321         ktime_t  busy_start_t;
 322         bool is_busy_started;
 323         unsigned long  tot_busy_t;
 324         unsigned long window_start_t;
 325 };
 326
 327 /**
 328  * struct ufs_init_prefetch - contains data that is pre-fetched once during
 329  * initialization
 330  * @icc_level: icc level which was read during initialization
 331  */
 332 struct ufs_init_prefetch {
 333         u32 icc_level;
 334 };
 335
 336 /**
 337  * struct ufs_hba - per adapter private structure
 338  * @mmio_base: UFSHCI base register address
 339  * @ucdl_base_addr: UFS Command Descriptor base address
 340  * @utrdl_base_addr: UTP Transfer Request Descriptor base address
 341  * @utmrdl_base_addr: UTP Task Management Descriptor base address
 342  * @ucdl_dma_addr: UFS Command Descriptor DMA address
 343  * @utrdl_dma_addr: UTRDL DMA address
 344  * @utmrdl_dma_addr: UTMRDL DMA address
 345  * @host: Scsi_Host instance of the driver
 346  * @dev: device handle
 347  * @lrb: local reference block
 348  * @lrb_in_use: lrb in use
 349  * @outstanding_tasks: Bits representing outstanding task requests
 350  * @outstanding_reqs: Bits representing outstanding transfer requests
 351  * @capabilities: UFS Controller Capabilities
 352  * @nutrs: Transfer Request Queue depth supported by controller
 353  * @nutmrs: Task Management Queue depth supported by controller
 354  * @ufs_version: UFS Version to which controller complies
 355  * @vops: pointer to variant specific operations
 356  * @priv: pointer to variant specific private data
 357  * @irq: Irq number of the controller
 358  * @active_uic_cmd: handle of active UIC command
 359  * @uic_cmd_mutex: mutex for uic command
 360  * @tm_wq: wait queue for task management
 361  * @tm_tag_wq: wait queue for free task management slots
 362  * @tm_slots_in_use: bit map of task management request slots in use
 363  * @pwr_done: completion for power mode change
 364  * @tm_condition: condition variable for task management
 365  * @ufshcd_state: UFSHCD states
 366  * @eh_flags: Error handling flags
 367  * @intr_mask: Interrupt Mask Bits
 368  * @ee_ctrl_mask: Exception event control mask
 369  * @is_powered: flag to check if HBA is powered
 370  * @is_init_prefetch: flag to check if data was pre-fetched in initialization
 371  * @init_prefetch_data: data pre-fetched during initialization
 372  * @eh_work: Worker to handle UFS errors that require s/w attention
 373  * @eeh_work: Worker to handle exception events
 374  * @errors: HBA errors
 375  * @uic_error: UFS interconnect layer error status
 376  * @saved_err: sticky error mask
 377  * @saved_uic_err: sticky UIC error mask
 378  * @dev_cmd: ufs device management command information
 379  * @last_dme_cmd_tstamp: time stamp of the last completed DME command
 380  * @auto_bkops_enabled: to track whether bkops is enabled in device
 381  * @vreg_info: UFS device voltage regulator information
 382  * @clk_list_head: UFS host controller clocks list node head
 383  * @pwr_info: holds current power mode
 384  * @max_pwr_info: keeps the device max valid pwm
 385  */
 386 struct ufs_hba {
 387         void __iomem *mmio_base;
 388
 389         /* Virtual memory reference */
 390         struct utp_transfer_cmd_desc *ucdl_base_addr;
 391         struct utp_transfer_req_desc *utrdl_base_addr;
 392         struct utp_task_req_desc *utmrdl_base_addr;
 393
 394         /* DMA memory reference */
 395         dma_addr_t ucdl_dma_addr;
 396         dma_addr_t utrdl_dma_addr;
 397         dma_addr_t utmrdl_dma_addr;
 398
 399         struct Scsi_Host *host;
 400         struct device *dev;
 401         /*
 402          * This field is to keep a reference to "scsi_device" corresponding to
 403          * "UFS device" W-LU.
 404          */
 405         struct scsi_device *sdev_ufs_device;
 406
 407         enum ufs_dev_pwr_mode curr_dev_pwr_mode;
 408         enum uic_link_state uic_link_state;
 409         /* Desired UFS power management level during runtime PM */
 410         enum ufs_pm_level rpm_lvl;
 411         /* Desired UFS power management level during system PM */
 412         enum ufs_pm_level spm_lvl;
 413         int pm_op_in_progress;
 414
 415         struct ufshcd_lrb *lrb;
 416         unsigned long lrb_in_use;
 417
 418         unsigned long outstanding_tasks;
 419         unsigned long outstanding_reqs;
 420
 421         u32 capabilities;
 422         int nutrs;
 423         int nutmrs;
 424         u32 ufs_version;
 425         struct ufs_hba_variant_ops *vops;
 426         void *priv;
 427         unsigned int irq;
 428         bool is_irq_enabled;
 429
 430         /* Interrupt aggregation support is broken */
 431         #define UFSHCD_QUIRK_BROKEN_INTR_AGGR                   UFS_BIT(0)
 432
 433         /*
 434          * delay before each dme command is required as the unipro
 435          * layer has shown instabilities
 436          */
 437         #define UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS              UFS_BIT(1)
 438
 439         /*
 440          * If UFS host controller is having issue in processing LCC (Line
 441          * Control Command) coming from device then enable this quirk.
 442          * When this quirk is enabled, host controller driver should disable
 443          * the LCC transmission on UFS device (by clearing TX_LCC_ENABLE
 444          * attribute of device to 0).
 445          */
 446         #define UFSHCD_QUIRK_BROKEN_LCC                         UFS_BIT(2)
 447
 448         /*
 449          * The attribute PA_RXHSUNTERMCAP specifies whether or not the
 450          * inbound Link supports unterminated line in HS mode. Setting this
 451          * attribute to 1 fixes moving to HS gear.
 452          */
 453         #define UFSHCD_QUIRK_BROKEN_PA_RXHSUNTERMCAP            UFS_BIT(3)
 454
 455         /*
 456          * This quirk needs to be enabled if the host contoller only allows
 457          * accessing the peer dme attributes in AUTO mode (FAST AUTO or
 458          * SLOW AUTO).
 459          */
 460         #define UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE          UFS_BIT(4)
 461
 462         /*
 463          * This quirk needs to be enabled if the host contoller doesn't
 464          * advertise the correct version in UFS_VER register. If this quirk
 465          * is enabled, standard UFS host driver will call the vendor specific
 466          * ops (get_ufs_hci_version) to get the correct version.
 467          */
 468         #define UFSHCD_QUIRK_BROKEN_UFS_HCI_VERSION             UFS_BIT(5)
 469
 470         unsigned int quirks;    /* Deviations from standard UFSHCI spec. */
 471
 472         wait_queue_head_t tm_wq;
 473         wait_queue_head_t tm_tag_wq;
 474         unsigned long tm_condition;
 475         unsigned long tm_slots_in_use;
 476
 477         struct uic_command *active_uic_cmd;
 478         struct mutex uic_cmd_mutex;
 479         struct completion *uic_async_done;
 480
 481         u32 ufshcd_state;
 482         u32 eh_flags;
 483         u32 intr_mask;
 484         u16 ee_ctrl_mask;
 485         bool is_powered;
 486         bool is_init_prefetch;
 487         struct ufs_init_prefetch init_prefetch_data;
 488
 489         /* Work Queues */
 490         struct work_struct eh_work;
 491         struct work_struct eeh_work;
 492
 493         /* HBA Errors */
 494         u32 errors;
 495         u32 uic_error;
 496         u32 saved_err;
 497         u32 saved_uic_err;
 498
 499         /* Device management request data */
 500         struct ufs_dev_cmd dev_cmd;
 501         ktime_t last_dme_cmd_tstamp;
 502
 503         /* Keeps information of the UFS device connected to this host */
 504         struct ufs_dev_info dev_info;
 505         bool auto_bkops_enabled;
 506         struct ufs_vreg_info vreg_info;
 507         struct list_head clk_list_head;
 508
 509         bool wlun_dev_clr_ua;
 510
 511         struct ufs_pa_layer_attr pwr_info;
 512         struct ufs_pwr_mode_info max_pwr_info;
 513
 514         struct ufs_clk_gating clk_gating;
 515         /* Control to enable/disable host capabilities */
 516         u32 caps;
 517         /* Allow dynamic clk gating */
 518 #define UFSHCD_CAP_CLK_GATING   (1 << 0)
 519         /* Allow hiberb8 with clk gating */
 520 #define UFSHCD_CAP_HIBERN8_WITH_CLK_GATING (1 << 1)
 521         /* Allow dynamic clk scaling */
 522 #define UFSHCD_CAP_CLK_SCALING  (1 << 2)
 523         /* Allow auto bkops to enabled during runtime suspend */
 524 #define UFSHCD_CAP_AUTO_BKOPS_SUSPEND (1 << 3)
 525         /*
 526          * This capability allows host controller driver to use the UFS HCI's
 527          * interrupt aggregation capability.
 528          * CAUTION: Enabling this might reduce overall UFS throughput.
 529          */
 530 #define UFSHCD_CAP_INTR_AGGR (1 << 4)
 531
 532         struct devfreq *devfreq;
 533         struct ufs_clk_scaling clk_scaling;
 534         bool is_sys_suspended;
 535 };
 536
 537 /* Returns true if clocks can be gated. Otherwise false */
 538 static inline bool ufshcd_is_clkgating_allowed(struct ufs_hba *hba)
 539 {
 540         return hba->caps & UFSHCD_CAP_CLK_GATING;
 541 }
 542 static inline bool ufshcd_can_hibern8_during_gating(struct ufs_hba *hba)
 543 {
 544         return hba->caps & UFSHCD_CAP_HIBERN8_WITH_CLK_GATING;
 545 }
 546 static inline int ufshcd_is_clkscaling_enabled(struct ufs_hba *hba)
 547 {
 548         return hba->caps & UFSHCD_CAP_CLK_SCALING;
 549 }
 550 static inline bool ufshcd_can_autobkops_during_suspend(struct ufs_hba *hba)
 551 {
 552         return hba->caps & UFSHCD_CAP_AUTO_BKOPS_SUSPEND;
 553 }
 554
 555 static inline bool ufshcd_is_intr_aggr_allowed(struct ufs_hba *hba)
 556 {
 557         if ((hba->caps & UFSHCD_CAP_INTR_AGGR) &&
 558             !(hba->quirks & UFSHCD_QUIRK_BROKEN_INTR_AGGR))
 559                 return true;
 560         else
 561                 return false;
 562 }
 563
 564 #define ufshcd_writel(hba, val, reg)    \
 565         writel((val), (hba)->mmio_base + (reg))
 566 #define ufshcd_readl(hba, reg)  \
 567         readl((hba)->mmio_base + (reg))
 568
 569 /**
 570  * ufshcd_rmwl - read modify write into a register
 571  * @hba - per adapter instance
 572  * @mask - mask to apply on read value
 573  * @val - actual value to write
 574  * @reg - register address
 575  */
 576 static inline void ufshcd_rmwl(struct ufs_hba *hba, u32 mask, u32 val, u32 reg)
 577 {
 578         u32 tmp;
 579
 580         tmp = ufshcd_readl(hba, reg);
 581         tmp &= ~mask;
 582         tmp |= (val & mask);
 583         ufshcd_writel(hba, tmp, reg);
 584 }
 585
 586 int ufshcd_alloc_host(struct device *, struct ufs_hba **);
 587 void ufshcd_dealloc_host(struct ufs_hba *);
 588 int ufshcd_init(struct ufs_hba * , void __iomem * , unsigned int);
 589 void ufshcd_remove(struct ufs_hba *);
 590
 591 /**
 592  * ufshcd_hba_stop - Send controller to reset state
 593  * @hba: per adapter instance
 594  */
 595 static inline void ufshcd_hba_stop(struct ufs_hba *hba)
 596 {
 597         ufshcd_writel(hba, CONTROLLER_DISABLE,  REG_CONTROLLER_ENABLE);
 598 }
 599
 600 static inline void check_upiu_size(void)
 601 {
 602         BUILD_BUG_ON(ALIGNED_UPIU_SIZE <
 603                 GENERAL_UPIU_REQUEST_SIZE + QUERY_DESC_MAX_SIZE);
 604 }
 605
 606 /**
 607  * ufshcd_set_variant - set variant specific data to the hba
 608  * @hba - per adapter instance
 609  * @variant - pointer to variant specific data
 610  */
 611 static inline void ufshcd_set_variant(struct ufs_hba *hba, void *variant)
 612 {
 613         BUG_ON(!hba);
 614         hba->priv = variant;
 615 }
 616
 617 /**
 618  * ufshcd_get_variant - get variant specific data from the hba
 619  * @hba - per adapter instance
 620  */
 621 static inline void *ufshcd_get_variant(struct ufs_hba *hba)
 622 {
 623         BUG_ON(!hba);
 624         return hba->priv;
 625 }
 626
 627 extern int ufshcd_runtime_suspend(struct ufs_hba *hba);
 628 extern int ufshcd_runtime_resume(struct ufs_hba *hba);
 629 extern int ufshcd_runtime_idle(struct ufs_hba *hba);
 630 extern int ufshcd_system_suspend(struct ufs_hba *hba);
 631 extern int ufshcd_system_resume(struct ufs_hba *hba);
 632 extern int ufshcd_shutdown(struct ufs_hba *hba);
 633 extern int ufshcd_dme_set_attr(struct ufs_hba *hba, u32 attr_sel,
 634                                u8 attr_set, u32 mib_val, u8 peer);
 635 extern int ufshcd_dme_get_attr(struct ufs_hba *hba, u32 attr_sel,
 636                                u32 *mib_val, u8 peer);
 637
 638 /* UIC command interfaces for DME primitives */
 639 #define DME_LOCAL       0
 640 #define DME_PEER        1
 641 #define ATTR_SET_NOR    0       /* NORMAL */
 642 #define ATTR_SET_ST     1       /* STATIC */
 643
 644 static inline int ufshcd_dme_set(struct ufs_hba *hba, u32 attr_sel,
 645                                  u32 mib_val)
 646 {
 647         return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
 648                                    mib_val, DME_LOCAL);
 649 }
 650
 651 static inline int ufshcd_dme_st_set(struct ufs_hba *hba, u32 attr_sel,
 652                                     u32 mib_val)
 653 {
 654         return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
 655                                    mib_val, DME_LOCAL);
 656 }
 657
 658 static inline int ufshcd_dme_peer_set(struct ufs_hba *hba, u32 attr_sel,
 659                                       u32 mib_val)
 660 {
 661         return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
 662                                    mib_val, DME_PEER);
 663 }
 664
 665 static inline int ufshcd_dme_peer_st_set(struct ufs_hba *hba, u32 attr_sel,
 666                                          u32 mib_val)
 667 {
 668         return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
 669                                    mib_val, DME_PEER);
 670 }
 671
 672 static inline int ufshcd_dme_get(struct ufs_hba *hba,
 673                                  u32 attr_sel, u32 *mib_val)
 674 {
 675         return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_LOCAL);
 676 }
 677
 678 static inline int ufshcd_dme_peer_get(struct ufs_hba *hba,
 679                                       u32 attr_sel, u32 *mib_val)
 680 {
 681         return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_PEER);
 682 }
 683
 684 int ufshcd_hold(struct ufs_hba *hba, bool async);
 685 void ufshcd_release(struct ufs_hba *hba);
 686
 687 /* Wrapper functions for safely calling variant operations */
 688 static inline const char *ufshcd_get_var_name(struct ufs_hba *hba)
 689 {
 690         if (hba->vops)
 691                 return hba->vops->name;
 692         return "";
 693 }
 694
 695 static inline int ufshcd_vops_init(struct ufs_hba *hba)
 696 {
 697         if (hba->vops && hba->vops->init)
 698                 return hba->vops->init(hba);
 699
 700         return 0;
 701 }
 702
 703 static inline void ufshcd_vops_exit(struct ufs_hba *hba)
 704 {
 705         if (hba->vops && hba->vops->exit)
 706                 return hba->vops->exit(hba);
 707 }
 708
 709 static inline u32 ufshcd_vops_get_ufs_hci_version(struct ufs_hba *hba)
 710 {
 711         if (hba->vops && hba->vops->get_ufs_hci_version)
 712                 return hba->vops->get_ufs_hci_version(hba);
 713
 714         return ufshcd_readl(hba, REG_UFS_VERSION);
 715 }
 716
 717 static inline int ufshcd_vops_clk_scale_notify(struct ufs_hba *hba,
 718                         bool up, enum ufs_notify_change_status status)
 719 {
 720         if (hba->vops && hba->vops->clk_scale_notify)
 721                 return hba->vops->clk_scale_notify(hba, up, status);
 722         return 0;
 723 }
 724
 725 static inline int ufshcd_vops_setup_clocks(struct ufs_hba *hba, bool on)
 726 {
 727         if (hba->vops && hba->vops->setup_clocks)
 728                 return hba->vops->setup_clocks(hba, on);
 729         return 0;
 730 }
 731
 732 static inline int ufshcd_vops_setup_regulators(struct ufs_hba *hba, bool status)
 733 {
 734         if (hba->vops && hba->vops->setup_regulators)
 735                 return hba->vops->setup_regulators(hba, status);
 736
 737         return 0;
 738 }
 739
 740 static inline int ufshcd_vops_hce_enable_notify(struct ufs_hba *hba,
 741                                                 bool status)
 742 {
 743         if (hba->vops && hba->vops->hce_enable_notify)
 744                 return hba->vops->hce_enable_notify(hba, status);
 745
 746         return 0;
 747 }
 748 static inline int ufshcd_vops_link_startup_notify(struct ufs_hba *hba,
 749                                                 bool status)
 750 {
 751         if (hba->vops && hba->vops->link_startup_notify)
 752                 return hba->vops->link_startup_notify(hba, status);
 753
 754         return 0;
 755 }
 756
 757 static inline int ufshcd_vops_pwr_change_notify(struct ufs_hba *hba,
 758                                   bool status,
 759                                   struct ufs_pa_layer_attr *dev_max_params,
 760                                   struct ufs_pa_layer_attr *dev_req_params)
 761 {
 762         if (hba->vops && hba->vops->pwr_change_notify)
 763                 return hba->vops->pwr_change_notify(hba, status,
 764                                         dev_max_params, dev_req_params);
 765
 766         return -ENOTSUPP;
 767 }
 768
 769 static inline int ufshcd_vops_suspend(struct ufs_hba *hba, enum ufs_pm_op op)
 770 {
 771         if (hba->vops && hba->vops->suspend)
 772                 return hba->vops->suspend(hba, op);
 773
 774         return 0;
 775 }
 776
 777 static inline int ufshcd_vops_resume(struct ufs_hba *hba, enum ufs_pm_op op)
 778 {
 779         if (hba->vops && hba->vops->resume)
 780                 return hba->vops->resume(hba, op);
 781
 782         return 0;
 783 }
 784
 785 static inline void ufshcd_vops_dbg_register_dump(struct ufs_hba *hba)
 786 {
 787         if (hba->vops && hba->vops->dbg_register_dump)
 788                 hba->vops->dbg_register_dump(hba);
 789 }
 790
 791 #endif /* End of Header */