drivers/scsi/ufs/ufs-qcom.h

   1 /* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License version 2 and
   5  * only version 2 as published by the Free Software Foundation.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  */
  13
  14 #ifndef UFS_QCOM_H_
  15 #define UFS_QCOM_H_
  16
  17 #define MAX_UFS_QCOM_HOSTS      1
  18 #define MAX_U32                 (~(u32)0)
  19 #define MPHY_TX_FSM_STATE       0x41
  20 #define TX_FSM_HIBERN8          0x1
  21 #define HBRN8_POLL_TOUT_MS      100
  22 #define DEFAULT_CLK_RATE_HZ     1000000
  23 #define BUS_VECTOR_NAME_LEN     32
  24
  25 #define UFS_HW_VER_MAJOR_SHFT   (28)
  26 #define UFS_HW_VER_MAJOR_MASK   (0x000F << UFS_HW_VER_MAJOR_SHFT)
  27 #define UFS_HW_VER_MINOR_SHFT   (16)
  28 #define UFS_HW_VER_MINOR_MASK   (0x0FFF << UFS_HW_VER_MINOR_SHFT)
  29 #define UFS_HW_VER_STEP_SHFT    (0)
  30 #define UFS_HW_VER_STEP_MASK    (0xFFFF << UFS_HW_VER_STEP_SHFT)
  31
  32 /* vendor specific pre-defined parameters */
  33 #define SLOW 1
  34 #define FAST 2
  35
  36 #define UFS_QCOM_LIMIT_NUM_LANES_RX     2
  37 #define UFS_QCOM_LIMIT_NUM_LANES_TX     2
  38 #define UFS_QCOM_LIMIT_HSGEAR_RX        UFS_HS_G3
  39 #define UFS_QCOM_LIMIT_HSGEAR_TX        UFS_HS_G3
  40 #define UFS_QCOM_LIMIT_PWMGEAR_RX       UFS_PWM_G4
  41 #define UFS_QCOM_LIMIT_PWMGEAR_TX       UFS_PWM_G4
  42 #define UFS_QCOM_LIMIT_RX_PWR_PWM       SLOW_MODE
  43 #define UFS_QCOM_LIMIT_TX_PWR_PWM       SLOW_MODE
  44 #define UFS_QCOM_LIMIT_RX_PWR_HS        FAST_MODE
  45 #define UFS_QCOM_LIMIT_TX_PWR_HS        FAST_MODE
  46 #define UFS_QCOM_LIMIT_HS_RATE          PA_HS_MODE_B
  47 #define UFS_QCOM_LIMIT_DESIRED_MODE     FAST
  48
  49 /* QCOM UFS host controller vendor specific registers */
  50 enum {
  51         REG_UFS_SYS1CLK_1US                 = 0xC0,
  52         REG_UFS_TX_SYMBOL_CLK_NS_US         = 0xC4,
  53         REG_UFS_LOCAL_PORT_ID_REG           = 0xC8,
  54         REG_UFS_PA_ERR_CODE                 = 0xCC,
  55         REG_UFS_RETRY_TIMER_REG             = 0xD0,
  56         REG_UFS_PA_LINK_STARTUP_TIMER       = 0xD8,
  57         REG_UFS_CFG1                        = 0xDC,
  58         REG_UFS_CFG2                        = 0xE0,
  59         REG_UFS_HW_VERSION                  = 0xE4,
  60
  61         UFS_TEST_BUS                            = 0xE8,
  62         UFS_TEST_BUS_CTRL_0                     = 0xEC,
  63         UFS_TEST_BUS_CTRL_1                     = 0xF0,
  64         UFS_TEST_BUS_CTRL_2                     = 0xF4,
  65         UFS_UNIPRO_CFG                          = 0xF8,
  66
  67         /*
  68          * QCOM UFS host controller vendor specific registers
  69          * added in HW Version 3.0.0
  70          */
  71         UFS_AH8_CFG                             = 0xFC,
  72 };
  73
  74 /* QCOM UFS host controller vendor specific debug registers */
  75 enum {
  76         UFS_DBG_RD_REG_UAWM                     = 0x100,
  77         UFS_DBG_RD_REG_UARM                     = 0x200,
  78         UFS_DBG_RD_REG_TXUC                     = 0x300,
  79         UFS_DBG_RD_REG_RXUC                     = 0x400,
  80         UFS_DBG_RD_REG_DFC                      = 0x500,
  81         UFS_DBG_RD_REG_TRLUT                    = 0x600,
  82         UFS_DBG_RD_REG_TMRLUT                   = 0x700,
  83         UFS_UFS_DBG_RD_REG_OCSC                 = 0x800,
  84
  85         UFS_UFS_DBG_RD_DESC_RAM                 = 0x1500,
  86         UFS_UFS_DBG_RD_PRDT_RAM                 = 0x1700,
  87         UFS_UFS_DBG_RD_RESP_RAM                 = 0x1800,
  88         UFS_UFS_DBG_RD_EDTL_RAM                 = 0x1900,
  89 };
  90
  91 #define UFS_CNTLR_2_x_x_VEN_REGS_OFFSET(x)      (0x000 + x)
  92 #define UFS_CNTLR_3_x_x_VEN_REGS_OFFSET(x)      (0x400 + x)
  93
  94 /* bit definitions for REG_UFS_CFG1 register */
  95 #define QUNIPRO_SEL     UFS_BIT(0)
  96 #define TEST_BUS_EN             BIT(18)
  97 #define TEST_BUS_SEL            GENMASK(22, 19)
  98 #define UFS_REG_TEST_BUS_EN     BIT(30)
  99
 100 /* bit definitions for REG_UFS_CFG2 register */
 101 #define UAWM_HW_CGC_EN          (1 << 0)
 102 #define UARM_HW_CGC_EN          (1 << 1)
 103 #define TXUC_HW_CGC_EN          (1 << 2)
 104 #define RXUC_HW_CGC_EN          (1 << 3)
 105 #define DFC_HW_CGC_EN           (1 << 4)
 106 #define TRLUT_HW_CGC_EN         (1 << 5)
 107 #define TMRLUT_HW_CGC_EN        (1 << 6)
 108 #define OCSC_HW_CGC_EN          (1 << 7)
 109
 110 /* bit definition for UFS_UFS_TEST_BUS_CTRL_n */
 111 #define TEST_BUS_SUB_SEL_MASK   0x1F  /* All XXX_SEL fields are 5 bits wide */
 112
 113 #define REG_UFS_CFG2_CGC_EN_ALL (UAWM_HW_CGC_EN | UARM_HW_CGC_EN |\
 114                                  TXUC_HW_CGC_EN | RXUC_HW_CGC_EN |\
 115                                  DFC_HW_CGC_EN | TRLUT_HW_CGC_EN |\
 116                                  TMRLUT_HW_CGC_EN | OCSC_HW_CGC_EN)
 117
 118 /* bit offset */
 119 enum {
 120         OFFSET_UFS_PHY_SOFT_RESET           = 1,
 121         OFFSET_CLK_NS_REG                   = 10,
 122 };
 123
 124 /* bit masks */
 125 enum {
 126         MASK_UFS_PHY_SOFT_RESET             = 0x2,
 127         MASK_TX_SYMBOL_CLK_1US_REG          = 0x3FF,
 128         MASK_CLK_NS_REG                     = 0xFFFC00,
 129 };
 130
 131 enum ufs_qcom_phy_init_type {
 132         UFS_PHY_INIT_FULL,
 133         UFS_PHY_INIT_CFG_RESTORE,
 134 };
 135
 136 /* QCOM UFS debug print bit mask */
 137 #define UFS_QCOM_DBG_PRINT_REGS_EN      BIT(0)
 138 #define UFS_QCOM_DBG_PRINT_ICE_REGS_EN  BIT(1)
 139 #define UFS_QCOM_DBG_PRINT_TEST_BUS_EN  BIT(2)
 140
 141 #define UFS_QCOM_DBG_PRINT_ALL  \
 142         (UFS_QCOM_DBG_PRINT_REGS_EN | UFS_QCOM_DBG_PRINT_ICE_REGS_EN | \
 143          UFS_QCOM_DBG_PRINT_TEST_BUS_EN)
 144
 145 /* QUniPro Vendor specific attributes */
 146 #define PA_VS_CONFIG_REG1       0x9000
 147 #define DME_VS_CORE_CLK_CTRL    0xD002
 148 /* bit and mask definitions for DME_VS_CORE_CLK_CTRL attribute */
 149 #define DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT                BIT(8)
 150 #define DME_VS_CORE_CLK_CTRL_MAX_CORE_CLK_1US_CYCLES_MASK       0xFF
 151
 152 static inline void
 153 ufs_qcom_get_controller_revision(struct ufs_hba *hba,
 154                                  u8 *major, u16 *minor, u16 *step)
 155 {
 156         u32 ver = ufshcd_readl(hba, REG_UFS_HW_VERSION);
 157
 158         *major = (ver & UFS_HW_VER_MAJOR_MASK) >> UFS_HW_VER_MAJOR_SHFT;
 159         *minor = (ver & UFS_HW_VER_MINOR_MASK) >> UFS_HW_VER_MINOR_SHFT;
 160         *step = (ver & UFS_HW_VER_STEP_MASK) >> UFS_HW_VER_STEP_SHFT;
 161 };
 162
 163 static inline void ufs_qcom_assert_reset(struct ufs_hba *hba)
 164 {
 165         ufshcd_rmwl(hba, MASK_UFS_PHY_SOFT_RESET,
 166                         1 << OFFSET_UFS_PHY_SOFT_RESET, REG_UFS_CFG1);
 167
 168         /*
 169          * Make sure assertion of ufs phy reset is written to
 170          * register before returning
 171          */
 172         mb();
 173 }
 174
 175 static inline void ufs_qcom_deassert_reset(struct ufs_hba *hba)
 176 {
 177         ufshcd_rmwl(hba, MASK_UFS_PHY_SOFT_RESET,
 178                         0 << OFFSET_UFS_PHY_SOFT_RESET, REG_UFS_CFG1);
 179
 180         /*
 181          * Make sure de-assertion of ufs phy reset is written to
 182          * register before returning
 183          */
 184         mb();
 185 }
 186
 187 struct ufs_qcom_bus_vote {
 188         uint32_t client_handle;
 189         uint32_t curr_vote;
 190         int min_bw_vote;
 191         int max_bw_vote;
 192         int saved_vote;
 193         bool is_max_bw_needed;
 194         struct device_attribute max_bus_bw;
 195 };
 196
 197 /* Host controller hardware version: major.minor.step */
 198 struct ufs_hw_version {
 199         u16 step;
 200         u16 minor;
 201         u8 major;
 202 };
 203
 204 struct ufs_qcom_testbus {
 205         u8 select_major;
 206         u8 select_minor;
 207 };
 208
 209 struct ufs_qcom_host {
 210         /*
 211          * Set this capability if host controller supports the QUniPro mode
 212          * and if driver wants the Host controller to operate in QUniPro mode.
 213          * Note: By default this capability will be kept enabled if host
 214          * controller supports the QUniPro mode.
 215          */
 216         #define UFS_QCOM_CAP_QUNIPRO    UFS_BIT(0)
 217
 218         /*
 219          * Set this capability if host controller can retain the secure
 220          * configuration even after UFS controller core power collapse.
 221          */
 222         #define UFS_QCOM_CAP_RETAIN_SEC_CFG_AFTER_PWR_COLLAPSE  UFS_BIT(1)
 223         u32 caps;
 224
 225         struct phy *generic_phy;
 226         struct ufs_hba *hba;
 227         struct ufs_qcom_bus_vote bus_vote;
 228         struct ufs_pa_layer_attr dev_req_params;
 229         struct clk *rx_l0_sync_clk;
 230         struct clk *tx_l0_sync_clk;
 231         struct clk *rx_l1_sync_clk;
 232         struct clk *tx_l1_sync_clk;
 233         bool is_lane_clks_enabled;
 234
 235         void __iomem *dev_ref_clk_ctrl_mmio;
 236         bool is_dev_ref_clk_enabled;
 237         struct ufs_hw_version hw_ver;
 238
 239         u32 dev_ref_clk_en_mask;
 240
 241         /* Bitmask for enabling debug prints */
 242         u32 dbg_print_en;
 243         struct ufs_qcom_testbus testbus;
 244 };
 245
 246 static inline u32
 247 ufs_qcom_get_debug_reg_offset(struct ufs_qcom_host *host, u32 reg)
 248 {
 249         if (host->hw_ver.major <= 0x02)
 250                 return UFS_CNTLR_2_x_x_VEN_REGS_OFFSET(reg);
 251
 252         return UFS_CNTLR_3_x_x_VEN_REGS_OFFSET(reg);
 253 };
 254
 255 #define ufs_qcom_is_link_off(hba) ufshcd_is_link_off(hba)
 256 #define ufs_qcom_is_link_active(hba) ufshcd_is_link_active(hba)
 257 #define ufs_qcom_is_link_hibern8(hba) ufshcd_is_link_hibern8(hba)
 258
 259 int ufs_qcom_testbus_config(struct ufs_qcom_host *host);
 260
 261 static inline bool ufs_qcom_cap_qunipro(struct ufs_qcom_host *host)
 262 {
 263         if (host->caps & UFS_QCOM_CAP_QUNIPRO)
 264                 return true;
 265         else
 266                 return false;
 267 }
 268
 269 #endif /* UFS_QCOM_H_ */