drivers/soundwire/qcom.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (c) 2019, Linaro Limited
   3
   4 #include <linux/clk.h>
   5 #include <linux/completion.h>
   6 #include <linux/interrupt.h>
   7 #include <linux/io.h>
   8 #include <linux/kernel.h>
   9 #include <linux/module.h>
  10 #include <linux/debugfs.h>
  11 #include <linux/of.h>
  12 #include <linux/of_irq.h>
  13 #include <linux/pm_runtime.h>
  14 #include <linux/regmap.h>
  15 #include <linux/reset.h>
  16 #include <linux/slab.h>
  17 #include <linux/pm_wakeirq.h>
  18 #include <linux/slimbus.h>
  19 #include <linux/soundwire/sdw.h>
  20 #include <linux/soundwire/sdw_registers.h>
  21 #include <sound/pcm_params.h>
  22 #include <sound/soc.h>
  23 #include "bus.h"
  24
  25 #define SWRM_COMP_SW_RESET                                      0x008
  26 #define SWRM_COMP_STATUS                                        0x014
  27 #define SWRM_LINK_MANAGER_EE                                    0x018
  28 #define SWRM_EE_CPU                                             1
  29 #define SWRM_FRM_GEN_ENABLED                                    BIT(0)
  30 #define SWRM_VERSION_1_3_0                                      0x01030000
  31 #define SWRM_VERSION_1_5_1                                      0x01050001
  32 #define SWRM_VERSION_1_7_0                                      0x01070000
  33 #define SWRM_VERSION_2_0_0                                      0x02000000
  34 #define SWRM_COMP_HW_VERSION                                    0x00
  35 #define SWRM_COMP_CFG_ADDR                                      0x04
  36 #define SWRM_COMP_CFG_IRQ_LEVEL_OR_PULSE_MSK                    BIT(1)
  37 #define SWRM_COMP_CFG_ENABLE_MSK                                BIT(0)
  38 #define SWRM_COMP_PARAMS                                        0x100
  39 #define SWRM_COMP_PARAMS_WR_FIFO_DEPTH                          GENMASK(14, 10)
  40 #define SWRM_COMP_PARAMS_RD_FIFO_DEPTH                          GENMASK(19, 15)
  41 #define SWRM_COMP_PARAMS_DOUT_PORTS_MASK                        GENMASK(4, 0)
  42 #define SWRM_COMP_PARAMS_DIN_PORTS_MASK                         GENMASK(9, 5)
  43 #define SWRM_COMP_MASTER_ID                                     0x104
  44 #define SWRM_V1_3_INTERRUPT_STATUS                              0x200
  45 #define SWRM_V2_0_INTERRUPT_STATUS                              0x5000
  46 #define SWRM_INTERRUPT_STATUS_RMSK                              GENMASK(16, 0)
  47 #define SWRM_INTERRUPT_STATUS_SLAVE_PEND_IRQ                    BIT(0)
  48 #define SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED                BIT(1)
  49 #define SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS          BIT(2)
  50 #define SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET                  BIT(3)
  51 #define SWRM_INTERRUPT_STATUS_RD_FIFO_OVERFLOW                  BIT(4)
  52 #define SWRM_INTERRUPT_STATUS_RD_FIFO_UNDERFLOW                 BIT(5)
  53 #define SWRM_INTERRUPT_STATUS_WR_CMD_FIFO_OVERFLOW              BIT(6)
  54 #define SWRM_INTERRUPT_STATUS_CMD_ERROR                         BIT(7)
  55 #define SWRM_INTERRUPT_STATUS_DOUT_PORT_COLLISION               BIT(8)
  56 #define SWRM_INTERRUPT_STATUS_READ_EN_RD_VALID_MISMATCH         BIT(9)
  57 #define SWRM_INTERRUPT_STATUS_SPECIAL_CMD_ID_FINISHED           BIT(10)
  58 #define SWRM_INTERRUPT_STATUS_AUTO_ENUM_FAILED                  BIT(11)
  59 #define SWRM_INTERRUPT_STATUS_AUTO_ENUM_TABLE_IS_FULL           BIT(12)
  60 #define SWRM_INTERRUPT_STATUS_BUS_RESET_FINISHED_V2             BIT(13)
  61 #define SWRM_INTERRUPT_STATUS_CLK_STOP_FINISHED_V2              BIT(14)
  62 #define SWRM_INTERRUPT_STATUS_EXT_CLK_STOP_WAKEUP               BIT(16)
  63 #define SWRM_INTERRUPT_STATUS_CMD_IGNORED_AND_EXEC_CONTINUED    BIT(19)
  64 #define SWRM_INTERRUPT_MAX                                      17
  65 #define SWRM_V1_3_INTERRUPT_MASK_ADDR                           0x204
  66 #define SWRM_V1_3_INTERRUPT_CLEAR                               0x208
  67 #define SWRM_V2_0_INTERRUPT_CLEAR                               0x5008
  68 #define SWRM_V1_3_INTERRUPT_CPU_EN                              0x210
  69 #define SWRM_V2_0_INTERRUPT_CPU_EN                              0x5004
  70 #define SWRM_V1_3_CMD_FIFO_WR_CMD                               0x300
  71 #define SWRM_V2_0_CMD_FIFO_WR_CMD                               0x5020
  72 #define SWRM_V1_3_CMD_FIFO_RD_CMD                               0x304
  73 #define SWRM_V2_0_CMD_FIFO_RD_CMD                               0x5024
  74 #define SWRM_CMD_FIFO_CMD                                       0x308
  75 #define SWRM_CMD_FIFO_FLUSH                                     0x1
  76 #define SWRM_V1_3_CMD_FIFO_STATUS                               0x30C
  77 #define SWRM_V2_0_CMD_FIFO_STATUS                               0x5050
  78 #define SWRM_RD_CMD_FIFO_CNT_MASK                               GENMASK(20, 16)
  79 #define SWRM_WR_CMD_FIFO_CNT_MASK                               GENMASK(12, 8)
  80 #define SWRM_CMD_FIFO_CFG_ADDR                                  0x314
  81 #define SWRM_CONTINUE_EXEC_ON_CMD_IGNORE                        BIT(31)
  82 #define SWRM_RD_WR_CMD_RETRIES                                  0x7
  83 #define SWRM_V1_3_CMD_FIFO_RD_FIFO_ADDR                         0x318
  84 #define SWRM_V2_0_CMD_FIFO_RD_FIFO_ADDR                         0x5040
  85 #define SWRM_RD_FIFO_CMD_ID_MASK                                GENMASK(11, 8)
  86 #define SWRM_ENUMERATOR_CFG_ADDR                                0x500
  87 #define SWRM_ENUMERATOR_SLAVE_DEV_ID_1(m)               (0x530 + 0x8 * (m))
  88 #define SWRM_ENUMERATOR_SLAVE_DEV_ID_2(m)               (0x534 + 0x8 * (m))
  89 #define SWRM_MCP_FRAME_CTRL_BANK_ADDR(m)                (0x101C + 0x40 * (m))
  90 #define SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK                  GENMASK(2, 0)
  91 #define SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK                  GENMASK(7, 3)
  92 #define SWRM_MCP_BUS_CTRL                                       0x1044
  93 #define SWRM_MCP_BUS_CLK_START                                  BIT(1)
  94 #define SWRM_MCP_CFG_ADDR                                       0x1048
  95 #define SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_BMSK               GENMASK(21, 17)
  96 #define SWRM_DEF_CMD_NO_PINGS                                   0x1f
  97 #define SWRM_MCP_STATUS                                         0x104C
  98 #define SWRM_MCP_STATUS_BANK_NUM_MASK                           BIT(0)
  99 #define SWRM_MCP_SLV_STATUS                                     0x1090
 100 #define SWRM_MCP_SLV_STATUS_MASK                                GENMASK(1, 0)
 101 #define SWRM_MCP_SLV_STATUS_SZ                                  2
 102 #define SWRM_DP_PORT_CTRL_BANK(n, m)    (0x1124 + 0x100 * (n - 1) + 0x40 * m)
 103 #define SWRM_DP_PORT_CTRL_2_BANK(n, m)  (0x1128 + 0x100 * (n - 1) + 0x40 * m)
 104 #define SWRM_DP_BLOCK_CTRL_1(n)         (0x112C + 0x100 * (n - 1))
 105 #define SWRM_DP_BLOCK_CTRL2_BANK(n, m)  (0x1130 + 0x100 * (n - 1) + 0x40 * m)
 106 #define SWRM_DP_PORT_HCTRL_BANK(n, m)   (0x1134 + 0x100 * (n - 1) + 0x40 * m)
 107 #define SWRM_DP_BLOCK_CTRL3_BANK(n, m)  (0x1138 + 0x100 * (n - 1) + 0x40 * m)
 108 #define SWRM_DP_SAMPLECTRL2_BANK(n, m)  (0x113C + 0x100 * (n - 1) + 0x40 * m)
 109 #define SWRM_DIN_DPn_PCM_PORT_CTRL(n)   (0x1054 + 0x100 * (n - 1))
 110 #define SWR_V1_3_MSTR_MAX_REG_ADDR                              0x1740
 111 #define SWR_V2_0_MSTR_MAX_REG_ADDR                              0x50ac
 112
 113 #define SWRM_V2_0_CLK_CTRL                                      0x5060
 114 #define SWRM_V2_0_CLK_CTRL_CLK_START                            BIT(0)
 115 #define SWRM_V2_0_LINK_STATUS                                   0x5064
 116
 117 #define SWRM_DP_PORT_CTRL_EN_CHAN_SHFT                          0x18
 118 #define SWRM_DP_PORT_CTRL_OFFSET2_SHFT                          0x10
 119 #define SWRM_DP_PORT_CTRL_OFFSET1_SHFT                          0x08
 120 #define SWRM_AHB_BRIDGE_WR_DATA_0                               0xc85
 121 #define SWRM_AHB_BRIDGE_WR_ADDR_0                               0xc89
 122 #define SWRM_AHB_BRIDGE_RD_ADDR_0                               0xc8d
 123 #define SWRM_AHB_BRIDGE_RD_DATA_0                               0xc91
 124
 125 #define SWRM_REG_VAL_PACK(data, dev, id, reg)   \
 126                         ((reg) | ((id) << 16) | ((dev) << 20) | ((data) << 24))
 127
 128 #define MAX_FREQ_NUM                                            1
 129 #define TIMEOUT_MS                                              100
 130 #define QCOM_SWRM_MAX_RD_LEN                                    0x1
 131 #define QCOM_SDW_MAX_PORTS                                      14
 132 #define DEFAULT_CLK_FREQ                                        9600000
 133 #define SWRM_MAX_DAIS                                           0xF
 134 #define SWR_INVALID_PARAM                                       0xFF
 135 #define SWR_HSTOP_MAX_VAL                                       0xF
 136 #define SWR_HSTART_MIN_VAL                                      0x0
 137 #define SWR_BROADCAST_CMD_ID                                    0x0F
 138 #define SWR_MAX_CMD_ID                                          14
 139 #define MAX_FIFO_RD_RETRY                                       3
 140 #define SWR_OVERFLOW_RETRY_COUNT                                30
 141 #define SWRM_LINK_STATUS_RETRY_CNT                              100
 142
 143 enum {
 144         MASTER_ID_WSA = 1,
 145         MASTER_ID_RX,
 146         MASTER_ID_TX
 147 };
 148
 149 struct qcom_swrm_port_config {
 150         u16 si;
 151         u8 off1;
 152         u8 off2;
 153         u8 bp_mode;
 154         u8 hstart;
 155         u8 hstop;
 156         u8 word_length;
 157         u8 blk_group_count;
 158         u8 lane_control;
 159 };
 160
 161 /*
 162  * Internal IDs for different register layouts.  Only few registers differ per
 163  * each variant, so the list of IDs below does not include all of registers.
 164  */
 165 enum {
 166         SWRM_REG_FRAME_GEN_ENABLED,
 167         SWRM_REG_INTERRUPT_STATUS,
 168         SWRM_REG_INTERRUPT_MASK_ADDR,
 169         SWRM_REG_INTERRUPT_CLEAR,
 170         SWRM_REG_INTERRUPT_CPU_EN,
 171         SWRM_REG_CMD_FIFO_WR_CMD,
 172         SWRM_REG_CMD_FIFO_RD_CMD,
 173         SWRM_REG_CMD_FIFO_STATUS,
 174         SWRM_REG_CMD_FIFO_RD_FIFO_ADDR,
 175 };
 176
 177 struct qcom_swrm_ctrl {
 178         struct sdw_bus bus;
 179         struct device *dev;
 180         struct regmap *regmap;
 181         u32 max_reg;
 182         const unsigned int *reg_layout;
 183         void __iomem *mmio;
 184         struct reset_control *audio_cgcr;
 185 #ifdef CONFIG_DEBUG_FS
 186         struct dentry *debugfs;
 187 #endif
 188         struct completion broadcast;
 189         struct completion enumeration;
 190         /* Port alloc/free lock */
 191         struct mutex port_lock;
 192         struct clk *hclk;
 193         int irq;
 194         unsigned int version;
 195         int wake_irq;
 196         int num_din_ports;
 197         int num_dout_ports;
 198         int cols_index;
 199         int rows_index;
 200         unsigned long dout_port_mask;
 201         unsigned long din_port_mask;
 202         u32 intr_mask;
 203         u8 rcmd_id;
 204         u8 wcmd_id;
 205         /* Port numbers are 1 - 14 */
 206         struct qcom_swrm_port_config pconfig[QCOM_SDW_MAX_PORTS + 1];
 207         struct sdw_stream_runtime *sruntime[SWRM_MAX_DAIS];
 208         enum sdw_slave_status status[SDW_MAX_DEVICES + 1];
 209         int (*reg_read)(struct qcom_swrm_ctrl *ctrl, int reg, u32 *val);
 210         int (*reg_write)(struct qcom_swrm_ctrl *ctrl, int reg, int val);
 211         u32 slave_status;
 212         u32 wr_fifo_depth;
 213         u32 rd_fifo_depth;
 214         bool clock_stop_not_supported;
 215 };
 216
 217 struct qcom_swrm_data {
 218         u32 default_cols;
 219         u32 default_rows;
 220         bool sw_clk_gate_required;
 221         u32 max_reg;
 222         const unsigned int *reg_layout;
 223 };
 224
 225 static const unsigned int swrm_v1_3_reg_layout[] = {
 226         [SWRM_REG_FRAME_GEN_ENABLED] = SWRM_COMP_STATUS,
 227         [SWRM_REG_INTERRUPT_STATUS] = SWRM_V1_3_INTERRUPT_STATUS,
 228         [SWRM_REG_INTERRUPT_MASK_ADDR] = SWRM_V1_3_INTERRUPT_MASK_ADDR,
 229         [SWRM_REG_INTERRUPT_CLEAR] = SWRM_V1_3_INTERRUPT_CLEAR,
 230         [SWRM_REG_INTERRUPT_CPU_EN] = SWRM_V1_3_INTERRUPT_CPU_EN,
 231         [SWRM_REG_CMD_FIFO_WR_CMD] = SWRM_V1_3_CMD_FIFO_WR_CMD,
 232         [SWRM_REG_CMD_FIFO_RD_CMD] = SWRM_V1_3_CMD_FIFO_RD_CMD,
 233         [SWRM_REG_CMD_FIFO_STATUS] = SWRM_V1_3_CMD_FIFO_STATUS,
 234         [SWRM_REG_CMD_FIFO_RD_FIFO_ADDR] = SWRM_V1_3_CMD_FIFO_RD_FIFO_ADDR,
 235 };
 236
 237 static const struct qcom_swrm_data swrm_v1_3_data = {
 238         .default_rows = 48,
 239         .default_cols = 16,
 240         .max_reg = SWR_V1_3_MSTR_MAX_REG_ADDR,
 241         .reg_layout = swrm_v1_3_reg_layout,
 242 };
 243
 244 static const struct qcom_swrm_data swrm_v1_5_data = {
 245         .default_rows = 50,
 246         .default_cols = 16,
 247         .max_reg = SWR_V1_3_MSTR_MAX_REG_ADDR,
 248         .reg_layout = swrm_v1_3_reg_layout,
 249 };
 250
 251 static const struct qcom_swrm_data swrm_v1_6_data = {
 252         .default_rows = 50,
 253         .default_cols = 16,
 254         .sw_clk_gate_required = true,
 255         .max_reg = SWR_V1_3_MSTR_MAX_REG_ADDR,
 256         .reg_layout = swrm_v1_3_reg_layout,
 257 };
 258
 259 static const unsigned int swrm_v2_0_reg_layout[] = {
 260         [SWRM_REG_FRAME_GEN_ENABLED] = SWRM_V2_0_LINK_STATUS,
 261         [SWRM_REG_INTERRUPT_STATUS] = SWRM_V2_0_INTERRUPT_STATUS,
 262         [SWRM_REG_INTERRUPT_MASK_ADDR] = 0, /* Not present */
 263         [SWRM_REG_INTERRUPT_CLEAR] = SWRM_V2_0_INTERRUPT_CLEAR,
 264         [SWRM_REG_INTERRUPT_CPU_EN] = SWRM_V2_0_INTERRUPT_CPU_EN,
 265         [SWRM_REG_CMD_FIFO_WR_CMD] = SWRM_V2_0_CMD_FIFO_WR_CMD,
 266         [SWRM_REG_CMD_FIFO_RD_CMD] = SWRM_V2_0_CMD_FIFO_RD_CMD,
 267         [SWRM_REG_CMD_FIFO_STATUS] = SWRM_V2_0_CMD_FIFO_STATUS,
 268         [SWRM_REG_CMD_FIFO_RD_FIFO_ADDR] = SWRM_V2_0_CMD_FIFO_RD_FIFO_ADDR,
 269 };
 270
 271 static const struct qcom_swrm_data swrm_v2_0_data = {
 272         .default_rows = 50,
 273         .default_cols = 16,
 274         .sw_clk_gate_required = true,
 275         .max_reg = SWR_V2_0_MSTR_MAX_REG_ADDR,
 276         .reg_layout = swrm_v2_0_reg_layout,
 277 };
 278
 279 #define to_qcom_sdw(b)  container_of(b, struct qcom_swrm_ctrl, bus)
 280
 281 static int qcom_swrm_ahb_reg_read(struct qcom_swrm_ctrl *ctrl, int reg,
 282                                   u32 *val)
 283 {
 284         struct regmap *wcd_regmap = ctrl->regmap;
 285         int ret;
 286
 287         /* pg register + offset */
 288         ret = regmap_bulk_write(wcd_regmap, SWRM_AHB_BRIDGE_RD_ADDR_0,
 289                           (u8 *)&reg, 4);
 290         if (ret < 0)
 291                 return SDW_CMD_FAIL;
 292
 293         ret = regmap_bulk_read(wcd_regmap, SWRM_AHB_BRIDGE_RD_DATA_0,
 294                                val, 4);
 295         if (ret < 0)
 296                 return SDW_CMD_FAIL;
 297
 298         return SDW_CMD_OK;
 299 }
 300
 301 static int qcom_swrm_ahb_reg_write(struct qcom_swrm_ctrl *ctrl,
 302                                    int reg, int val)
 303 {
 304         struct regmap *wcd_regmap = ctrl->regmap;
 305         int ret;
 306         /* pg register + offset */
 307         ret = regmap_bulk_write(wcd_regmap, SWRM_AHB_BRIDGE_WR_DATA_0,
 308                           (u8 *)&val, 4);
 309         if (ret)
 310                 return SDW_CMD_FAIL;
 311
 312         /* write address register */
 313         ret = regmap_bulk_write(wcd_regmap, SWRM_AHB_BRIDGE_WR_ADDR_0,
 314                           (u8 *)&reg, 4);
 315         if (ret)
 316                 return SDW_CMD_FAIL;
 317
 318         return SDW_CMD_OK;
 319 }
 320
 321 static int qcom_swrm_cpu_reg_read(struct qcom_swrm_ctrl *ctrl, int reg,
 322                                   u32 *val)
 323 {
 324         *val = readl(ctrl->mmio + reg);
 325         return SDW_CMD_OK;
 326 }
 327
 328 static int qcom_swrm_cpu_reg_write(struct qcom_swrm_ctrl *ctrl, int reg,
 329                                    int val)
 330 {
 331         writel(val, ctrl->mmio + reg);
 332         return SDW_CMD_OK;
 333 }
 334
 335 static u32 swrm_get_packed_reg_val(u8 *cmd_id, u8 cmd_data,
 336                                    u8 dev_addr, u16 reg_addr)
 337 {
 338         u32 val;
 339         u8 id = *cmd_id;
 340
 341         if (id != SWR_BROADCAST_CMD_ID) {
 342                 if (id < SWR_MAX_CMD_ID)
 343                         id += 1;
 344                 else
 345                         id = 0;
 346                 *cmd_id = id;
 347         }
 348         val = SWRM_REG_VAL_PACK(cmd_data, dev_addr, id, reg_addr);
 349
 350         return val;
 351 }
 352
 353 static int swrm_wait_for_rd_fifo_avail(struct qcom_swrm_ctrl *ctrl)
 354 {
 355         u32 fifo_outstanding_data, value;
 356         int fifo_retry_count = SWR_OVERFLOW_RETRY_COUNT;
 357
 358         do {
 359                 /* Check for fifo underflow during read */
 360                 ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS],
 361                                &value);
 362                 fifo_outstanding_data = FIELD_GET(SWRM_RD_CMD_FIFO_CNT_MASK, value);
 363
 364                 /* Check if read data is available in read fifo */
 365                 if (fifo_outstanding_data > 0)
 366                         return 0;
 367
 368                 usleep_range(500, 510);
 369         } while (fifo_retry_count--);
 370
 371         if (fifo_outstanding_data == 0) {
 372                 dev_err_ratelimited(ctrl->dev, "%s err read underflow\n", __func__);
 373                 return -EIO;
 374         }
 375
 376         return 0;
 377 }
 378
 379 static int swrm_wait_for_wr_fifo_avail(struct qcom_swrm_ctrl *ctrl)
 380 {
 381         u32 fifo_outstanding_cmds, value;
 382         int fifo_retry_count = SWR_OVERFLOW_RETRY_COUNT;
 383
 384         do {
 385                 /* Check for fifo overflow during write */
 386                 ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS],
 387                                &value);
 388                 fifo_outstanding_cmds = FIELD_GET(SWRM_WR_CMD_FIFO_CNT_MASK, value);
 389
 390                 /* Check for space in write fifo before writing */
 391                 if (fifo_outstanding_cmds < ctrl->wr_fifo_depth)
 392                         return 0;
 393
 394                 usleep_range(500, 510);
 395         } while (fifo_retry_count--);
 396
 397         if (fifo_outstanding_cmds == ctrl->wr_fifo_depth) {
 398                 dev_err_ratelimited(ctrl->dev, "%s err write overflow\n", __func__);
 399                 return -EIO;
 400         }
 401
 402         return 0;
 403 }
 404
 405 static bool swrm_wait_for_wr_fifo_done(struct qcom_swrm_ctrl *ctrl)
 406 {
 407         u32 fifo_outstanding_cmds, value;
 408         int fifo_retry_count = SWR_OVERFLOW_RETRY_COUNT;
 409
 410         /* Check for fifo overflow during write */
 411         ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS], &value);
 412         fifo_outstanding_cmds = FIELD_GET(SWRM_WR_CMD_FIFO_CNT_MASK, value);
 413
 414         if (fifo_outstanding_cmds) {
 415                 while (fifo_retry_count) {
 416                         usleep_range(500, 510);
 417                         ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS], &value);
 418                         fifo_outstanding_cmds = FIELD_GET(SWRM_WR_CMD_FIFO_CNT_MASK, value);
 419                         fifo_retry_count--;
 420                         if (fifo_outstanding_cmds == 0)
 421                                 return true;
 422                 }
 423         } else {
 424                 return true;
 425         }
 426
 427
 428         return false;
 429 }
 430
 431 static int qcom_swrm_cmd_fifo_wr_cmd(struct qcom_swrm_ctrl *ctrl, u8 cmd_data,
 432                                      u8 dev_addr, u16 reg_addr)
 433 {
 434
 435         u32 val;
 436         int ret = 0;
 437         u8 cmd_id = 0x0;
 438
 439         if (dev_addr == SDW_BROADCAST_DEV_NUM) {
 440                 cmd_id = SWR_BROADCAST_CMD_ID;
 441                 val = swrm_get_packed_reg_val(&cmd_id, cmd_data,
 442                                               dev_addr, reg_addr);
 443         } else {
 444                 val = swrm_get_packed_reg_val(&ctrl->wcmd_id, cmd_data,
 445                                               dev_addr, reg_addr);
 446         }
 447
 448         if (swrm_wait_for_wr_fifo_avail(ctrl))
 449                 return SDW_CMD_FAIL_OTHER;
 450
 451         if (cmd_id == SWR_BROADCAST_CMD_ID)
 452                 reinit_completion(&ctrl->broadcast);
 453
 454         /* Its assumed that write is okay as we do not get any status back */
 455         ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_CMD_FIFO_WR_CMD], val);
 456
 457         if (ctrl->version <= SWRM_VERSION_1_3_0)
 458                 usleep_range(150, 155);
 459
 460         if (cmd_id == SWR_BROADCAST_CMD_ID) {
 461                 swrm_wait_for_wr_fifo_done(ctrl);
 462                 /*
 463                  * sleep for 10ms for MSM soundwire variant to allow broadcast
 464                  * command to complete.
 465                  */
 466                 ret = wait_for_completion_timeout(&ctrl->broadcast,
 467                                                   msecs_to_jiffies(TIMEOUT_MS));
 468                 if (!ret)
 469                         ret = SDW_CMD_IGNORED;
 470                 else
 471                         ret = SDW_CMD_OK;
 472
 473         } else {
 474                 ret = SDW_CMD_OK;
 475         }
 476         return ret;
 477 }
 478
 479 static int qcom_swrm_cmd_fifo_rd_cmd(struct qcom_swrm_ctrl *ctrl,
 480                                      u8 dev_addr, u16 reg_addr,
 481                                      u32 len, u8 *rval)
 482 {
 483         u32 cmd_data, cmd_id, val, retry_attempt = 0;
 484
 485         val = swrm_get_packed_reg_val(&ctrl->rcmd_id, len, dev_addr, reg_addr);
 486
 487         /*
 488          * Check for outstanding cmd wrt. write fifo depth to avoid
 489          * overflow as read will also increase write fifo cnt.
 490          */
 491         swrm_wait_for_wr_fifo_avail(ctrl);
 492
 493         /* wait for FIFO RD to complete to avoid overflow */
 494         usleep_range(100, 105);
 495         ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_CMD_FIFO_RD_CMD], val);
 496         /* wait for FIFO RD CMD complete to avoid overflow */
 497         usleep_range(250, 255);
 498
 499         if (swrm_wait_for_rd_fifo_avail(ctrl))
 500                 return SDW_CMD_FAIL_OTHER;
 501
 502         do {
 503                 ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_CMD_FIFO_RD_FIFO_ADDR],
 504                                &cmd_data);
 505                 rval[0] = cmd_data & 0xFF;
 506                 cmd_id = FIELD_GET(SWRM_RD_FIFO_CMD_ID_MASK, cmd_data);
 507
 508                 if (cmd_id != ctrl->rcmd_id) {
 509                         if (retry_attempt < (MAX_FIFO_RD_RETRY - 1)) {
 510                                 /* wait 500 us before retry on fifo read failure */
 511                                 usleep_range(500, 505);
 512                                 ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CMD,
 513                                                 SWRM_CMD_FIFO_FLUSH);
 514                                 ctrl->reg_write(ctrl,
 515                                                 ctrl->reg_layout[SWRM_REG_CMD_FIFO_RD_CMD],
 516                                                 val);
 517                         }
 518                         retry_attempt++;
 519                 } else {
 520                         return SDW_CMD_OK;
 521                 }
 522
 523         } while (retry_attempt < MAX_FIFO_RD_RETRY);
 524
 525         dev_err(ctrl->dev, "failed to read fifo: reg: 0x%x, rcmd_id: 0x%x,\
 526                 dev_num: 0x%x, cmd_data: 0x%x\n",
 527                 reg_addr, ctrl->rcmd_id, dev_addr, cmd_data);
 528
 529         return SDW_CMD_IGNORED;
 530 }
 531
 532 static int qcom_swrm_get_alert_slave_dev_num(struct qcom_swrm_ctrl *ctrl)
 533 {
 534         u32 val, status;
 535         int dev_num;
 536
 537         ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &val);
 538
 539         for (dev_num = 1; dev_num <= SDW_MAX_DEVICES; dev_num++) {
 540                 status = (val >> (dev_num * SWRM_MCP_SLV_STATUS_SZ));
 541
 542                 if ((status & SWRM_MCP_SLV_STATUS_MASK) == SDW_SLAVE_ALERT) {
 543                         ctrl->status[dev_num] = status & SWRM_MCP_SLV_STATUS_MASK;
 544                         return dev_num;
 545                 }
 546         }
 547
 548         return -EINVAL;
 549 }
 550
 551 static void qcom_swrm_get_device_status(struct qcom_swrm_ctrl *ctrl)
 552 {
 553         u32 val;
 554         int i;
 555
 556         ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &val);
 557         ctrl->slave_status = val;
 558
 559         for (i = 1; i <= SDW_MAX_DEVICES; i++) {
 560                 u32 s;
 561
 562                 s = (val >> (i * 2));
 563                 s &= SWRM_MCP_SLV_STATUS_MASK;
 564                 ctrl->status[i] = s;
 565         }
 566 }
 567
 568 static void qcom_swrm_set_slave_dev_num(struct sdw_bus *bus,
 569                                         struct sdw_slave *slave, int devnum)
 570 {
 571         struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
 572         u32 status;
 573
 574         ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &status);
 575         status = (status >> (devnum * SWRM_MCP_SLV_STATUS_SZ));
 576         status &= SWRM_MCP_SLV_STATUS_MASK;
 577
 578         if (status == SDW_SLAVE_ATTACHED) {
 579                 if (slave)
 580                         slave->dev_num = devnum;
 581                 mutex_lock(&bus->bus_lock);
 582                 set_bit(devnum, bus->assigned);
 583                 mutex_unlock(&bus->bus_lock);
 584         }
 585 }
 586
 587 static int qcom_swrm_enumerate(struct sdw_bus *bus)
 588 {
 589         struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
 590         struct sdw_slave *slave, *_s;
 591         struct sdw_slave_id id;
 592         u32 val1, val2;
 593         bool found;
 594         u64 addr;
 595         int i;
 596         char *buf1 = (char *)&val1, *buf2 = (char *)&val2;
 597
 598         for (i = 1; i <= SDW_MAX_DEVICES; i++) {
 599                 /* do not continue if the status is Not Present  */
 600                 if (!ctrl->status[i])
 601                         continue;
 602
 603                 /*SCP_Devid5 - Devid 4*/
 604                 ctrl->reg_read(ctrl, SWRM_ENUMERATOR_SLAVE_DEV_ID_1(i), &val1);
 605
 606                 /*SCP_Devid3 - DevId 2 Devid 1 Devid 0*/
 607                 ctrl->reg_read(ctrl, SWRM_ENUMERATOR_SLAVE_DEV_ID_2(i), &val2);
 608
 609                 if (!val1 && !val2)
 610                         break;
 611
 612                 addr = buf2[1] | (buf2[0] << 8) | (buf1[3] << 16) |
 613                         ((u64)buf1[2] << 24) | ((u64)buf1[1] << 32) |
 614                         ((u64)buf1[0] << 40);
 615
 616                 sdw_extract_slave_id(bus, addr, &id);
 617                 found = false;
 618                 ctrl->clock_stop_not_supported = false;
 619                 /* Now compare with entries */
 620                 list_for_each_entry_safe(slave, _s, &bus->slaves, node) {
 621                         if (sdw_compare_devid(slave, id) == 0) {
 622                                 qcom_swrm_set_slave_dev_num(bus, slave, i);
 623                                 if (slave->prop.clk_stop_mode1)
 624                                         ctrl->clock_stop_not_supported = true;
 625
 626                                 found = true;
 627                                 break;
 628                         }
 629                 }
 630
 631                 if (!found) {
 632                         qcom_swrm_set_slave_dev_num(bus, NULL, i);
 633                         sdw_slave_add(bus, &id, NULL);
 634                 }
 635         }
 636
 637         complete(&ctrl->enumeration);
 638         return 0;
 639 }
 640
 641 static irqreturn_t qcom_swrm_wake_irq_handler(int irq, void *dev_id)
 642 {
 643         struct qcom_swrm_ctrl *ctrl = dev_id;
 644         int ret;
 645
 646         ret = pm_runtime_get_sync(ctrl->dev);
 647         if (ret < 0 && ret != -EACCES) {
 648                 dev_err_ratelimited(ctrl->dev,
 649                                     "pm_runtime_get_sync failed in %s, ret %d\n",
 650                                     __func__, ret);
 651                 pm_runtime_put_noidle(ctrl->dev);
 652                 return ret;
 653         }
 654
 655         if (ctrl->wake_irq > 0) {
 656                 if (!irqd_irq_disabled(irq_get_irq_data(ctrl->wake_irq)))
 657                         disable_irq_nosync(ctrl->wake_irq);
 658         }
 659
 660         pm_runtime_mark_last_busy(ctrl->dev);
 661         pm_runtime_put_autosuspend(ctrl->dev);
 662
 663         return IRQ_HANDLED;
 664 }
 665
 666 static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id)
 667 {
 668         struct qcom_swrm_ctrl *ctrl = dev_id;
 669         u32 value, intr_sts, intr_sts_masked, slave_status;
 670         u32 i;
 671         int devnum;
 672         int ret = IRQ_HANDLED;
 673         clk_prepare_enable(ctrl->hclk);
 674
 675         ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_STATUS],
 676                        &intr_sts);
 677         intr_sts_masked = intr_sts & ctrl->intr_mask;
 678
 679         do {
 680                 for (i = 0; i < SWRM_INTERRUPT_MAX; i++) {
 681                         value = intr_sts_masked & BIT(i);
 682                         if (!value)
 683                                 continue;
 684
 685                         switch (value) {
 686                         case SWRM_INTERRUPT_STATUS_SLAVE_PEND_IRQ:
 687                                 devnum = qcom_swrm_get_alert_slave_dev_num(ctrl);
 688                                 if (devnum < 0) {
 689                                         dev_err_ratelimited(ctrl->dev,
 690                                             "no slave alert found.spurious interrupt\n");
 691                                 } else {
 692                                         sdw_handle_slave_status(&ctrl->bus, ctrl->status);
 693                                 }
 694
 695                                 break;
 696                         case SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED:
 697                         case SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS:
 698                                 dev_dbg_ratelimited(ctrl->dev, "SWR new slave attached\n");
 699                                 ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &slave_status);
 700                                 if (ctrl->slave_status == slave_status) {
 701                                         dev_dbg(ctrl->dev, "Slave status not changed %x\n",
 702                                                 slave_status);
 703                                 } else {
 704                                         qcom_swrm_get_device_status(ctrl);
 705                                         qcom_swrm_enumerate(&ctrl->bus);
 706                                         sdw_handle_slave_status(&ctrl->bus, ctrl->status);
 707                                 }
 708                                 break;
 709                         case SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET:
 710                                 dev_err_ratelimited(ctrl->dev,
 711                                                 "%s: SWR bus clsh detected\n",
 712                                                 __func__);
 713                                 ctrl->intr_mask &= ~SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET;
 714                                 ctrl->reg_write(ctrl,
 715                                                 ctrl->reg_layout[SWRM_REG_INTERRUPT_CPU_EN],
 716                                                 ctrl->intr_mask);
 717                                 break;
 718                         case SWRM_INTERRUPT_STATUS_RD_FIFO_OVERFLOW:
 719                                 ctrl->reg_read(ctrl,
 720                                                ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS],
 721                                                &value);
 722                                 dev_err_ratelimited(ctrl->dev,
 723                                         "%s: SWR read FIFO overflow fifo status 0x%x\n",
 724                                         __func__, value);
 725                                 break;
 726                         case SWRM_INTERRUPT_STATUS_RD_FIFO_UNDERFLOW:
 727                                 ctrl->reg_read(ctrl,
 728                                                ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS],
 729                                                &value);
 730                                 dev_err_ratelimited(ctrl->dev,
 731                                         "%s: SWR read FIFO underflow fifo status 0x%x\n",
 732                                         __func__, value);
 733                                 break;
 734                         case SWRM_INTERRUPT_STATUS_WR_CMD_FIFO_OVERFLOW:
 735                                 ctrl->reg_read(ctrl,
 736                                                ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS],
 737                                                &value);
 738                                 dev_err(ctrl->dev,
 739                                         "%s: SWR write FIFO overflow fifo status %x\n",
 740                                         __func__, value);
 741                                 ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CMD, 0x1);
 742                                 break;
 743                         case SWRM_INTERRUPT_STATUS_CMD_ERROR:
 744                                 ctrl->reg_read(ctrl,
 745                                                ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS],
 746                                                &value);
 747                                 dev_err_ratelimited(ctrl->dev,
 748                                         "%s: SWR CMD error, fifo status 0x%x, flushing fifo\n",
 749                                         __func__, value);
 750                                 ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CMD, 0x1);
 751                                 break;
 752                         case SWRM_INTERRUPT_STATUS_DOUT_PORT_COLLISION:
 753                                 dev_err_ratelimited(ctrl->dev,
 754                                                 "%s: SWR Port collision detected\n",
 755                                                 __func__);
 756                                 ctrl->intr_mask &= ~SWRM_INTERRUPT_STATUS_DOUT_PORT_COLLISION;
 757                                 ctrl->reg_write(ctrl,
 758                                                 ctrl->reg_layout[SWRM_REG_INTERRUPT_CPU_EN],
 759                                                 ctrl->intr_mask);
 760                                 break;
 761                         case SWRM_INTERRUPT_STATUS_READ_EN_RD_VALID_MISMATCH:
 762                                 dev_err_ratelimited(ctrl->dev,
 763                                         "%s: SWR read enable valid mismatch\n",
 764                                         __func__);
 765                                 ctrl->intr_mask &=
 766                                         ~SWRM_INTERRUPT_STATUS_READ_EN_RD_VALID_MISMATCH;
 767                                 ctrl->reg_write(ctrl,
 768                                                 ctrl->reg_layout[SWRM_REG_INTERRUPT_CPU_EN],
 769                                                 ctrl->intr_mask);
 770                                 break;
 771                         case SWRM_INTERRUPT_STATUS_SPECIAL_CMD_ID_FINISHED:
 772                                 complete(&ctrl->broadcast);
 773                                 break;
 774                         case SWRM_INTERRUPT_STATUS_BUS_RESET_FINISHED_V2:
 775                                 break;
 776                         case SWRM_INTERRUPT_STATUS_CLK_STOP_FINISHED_V2:
 777                                 break;
 778                         case SWRM_INTERRUPT_STATUS_EXT_CLK_STOP_WAKEUP:
 779                                 break;
 780                         case SWRM_INTERRUPT_STATUS_CMD_IGNORED_AND_EXEC_CONTINUED:
 781                                 ctrl->reg_read(ctrl,
 782                                                ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS],
 783                                                &value);
 784                                 dev_err(ctrl->dev,
 785                                         "%s: SWR CMD ignored, fifo status %x\n",
 786                                         __func__, value);
 787
 788                                 /* Wait 3.5ms to clear */
 789                                 usleep_range(3500, 3505);
 790                                 break;
 791                         default:
 792                                 dev_err_ratelimited(ctrl->dev,
 793                                                 "%s: SWR unknown interrupt value: %d\n",
 794                                                 __func__, value);
 795                                 ret = IRQ_NONE;
 796                                 break;
 797                         }
 798                 }
 799                 ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_CLEAR],
 800                                 intr_sts);
 801                 ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_STATUS],
 802                                &intr_sts);
 803                 intr_sts_masked = intr_sts & ctrl->intr_mask;
 804         } while (intr_sts_masked);
 805
 806         clk_disable_unprepare(ctrl->hclk);
 807         return ret;
 808 }
 809
 810 static bool swrm_wait_for_frame_gen_enabled(struct qcom_swrm_ctrl *ctrl)
 811 {
 812         int retry = SWRM_LINK_STATUS_RETRY_CNT;
 813         int comp_sts;
 814
 815         do {
 816                 ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_FRAME_GEN_ENABLED],
 817                                &comp_sts);
 818                 if (comp_sts & SWRM_FRM_GEN_ENABLED)
 819                         return true;
 820
 821                 usleep_range(500, 510);
 822         } while (retry--);
 823
 824         dev_err(ctrl->dev, "%s: link status not %s\n", __func__,
 825                 comp_sts & SWRM_FRM_GEN_ENABLED ? "connected" : "disconnected");
 826
 827         return false;
 828 }
 829
 830 static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl)
 831 {
 832         u32 val;
 833
 834         /* Clear Rows and Cols */
 835         val = FIELD_PREP(SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK, ctrl->rows_index);
 836         val |= FIELD_PREP(SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK, ctrl->cols_index);
 837
 838         reset_control_reset(ctrl->audio_cgcr);
 839
 840         ctrl->reg_write(ctrl, SWRM_MCP_FRAME_CTRL_BANK_ADDR(0), val);
 841
 842         /* Enable Auto enumeration */
 843         ctrl->reg_write(ctrl, SWRM_ENUMERATOR_CFG_ADDR, 1);
 844
 845         ctrl->intr_mask = SWRM_INTERRUPT_STATUS_RMSK;
 846         /* Mask soundwire interrupts */
 847         if (ctrl->version < SWRM_VERSION_2_0_0)
 848                 ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_MASK_ADDR],
 849                                 SWRM_INTERRUPT_STATUS_RMSK);
 850
 851         /* Configure No pings */
 852         ctrl->reg_read(ctrl, SWRM_MCP_CFG_ADDR, &val);
 853         u32p_replace_bits(&val, SWRM_DEF_CMD_NO_PINGS, SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_BMSK);
 854         ctrl->reg_write(ctrl, SWRM_MCP_CFG_ADDR, val);
 855
 856         if (ctrl->version == SWRM_VERSION_1_7_0) {
 857                 ctrl->reg_write(ctrl, SWRM_LINK_MANAGER_EE, SWRM_EE_CPU);
 858                 ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL,
 859                                 SWRM_MCP_BUS_CLK_START << SWRM_EE_CPU);
 860         } else if (ctrl->version >= SWRM_VERSION_2_0_0) {
 861                 ctrl->reg_write(ctrl, SWRM_LINK_MANAGER_EE, SWRM_EE_CPU);
 862                 ctrl->reg_write(ctrl, SWRM_V2_0_CLK_CTRL,
 863                                 SWRM_V2_0_CLK_CTRL_CLK_START);
 864         } else {
 865                 ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL, SWRM_MCP_BUS_CLK_START);
 866         }
 867
 868         /* Configure number of retries of a read/write cmd */
 869         if (ctrl->version >= SWRM_VERSION_1_5_1) {
 870                 ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CFG_ADDR,
 871                                 SWRM_RD_WR_CMD_RETRIES |
 872                                 SWRM_CONTINUE_EXEC_ON_CMD_IGNORE);
 873         } else {
 874                 ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CFG_ADDR,
 875                                 SWRM_RD_WR_CMD_RETRIES);
 876         }
 877
 878         /* COMP Enable */
 879         ctrl->reg_write(ctrl, SWRM_COMP_CFG_ADDR, SWRM_COMP_CFG_ENABLE_MSK);
 880
 881         /* Set IRQ to PULSE */
 882         ctrl->reg_write(ctrl, SWRM_COMP_CFG_ADDR,
 883                         SWRM_COMP_CFG_IRQ_LEVEL_OR_PULSE_MSK);
 884
 885         ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_CLEAR],
 886                         0xFFFFFFFF);
 887
 888         /* enable CPU IRQs */
 889         if (ctrl->mmio) {
 890                 ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_CPU_EN],
 891                                 SWRM_INTERRUPT_STATUS_RMSK);
 892         }
 893
 894         /* Set IRQ to PULSE */
 895         ctrl->reg_write(ctrl, SWRM_COMP_CFG_ADDR,
 896                         SWRM_COMP_CFG_IRQ_LEVEL_OR_PULSE_MSK |
 897                         SWRM_COMP_CFG_ENABLE_MSK);
 898
 899         swrm_wait_for_frame_gen_enabled(ctrl);
 900         ctrl->slave_status = 0;
 901         ctrl->reg_read(ctrl, SWRM_COMP_PARAMS, &val);
 902         ctrl->rd_fifo_depth = FIELD_GET(SWRM_COMP_PARAMS_RD_FIFO_DEPTH, val);
 903         ctrl->wr_fifo_depth = FIELD_GET(SWRM_COMP_PARAMS_WR_FIFO_DEPTH, val);
 904
 905         return 0;
 906 }
 907
 908 static int qcom_swrm_read_prop(struct sdw_bus *bus)
 909 {
 910         struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
 911
 912         if (ctrl->version >= SWRM_VERSION_2_0_0) {
 913                 bus->multi_link = true;
 914                 bus->hw_sync_min_links = 3;
 915         }
 916
 917         return 0;
 918 }
 919
 920 static enum sdw_command_response qcom_swrm_xfer_msg(struct sdw_bus *bus,
 921                                                     struct sdw_msg *msg)
 922 {
 923         struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
 924         int ret, i, len;
 925
 926         if (msg->flags == SDW_MSG_FLAG_READ) {
 927                 for (i = 0; i < msg->len;) {
 928                         if ((msg->len - i) < QCOM_SWRM_MAX_RD_LEN)
 929                                 len = msg->len - i;
 930                         else
 931                                 len = QCOM_SWRM_MAX_RD_LEN;
 932
 933                         ret = qcom_swrm_cmd_fifo_rd_cmd(ctrl, msg->dev_num,
 934                                                         msg->addr + i, len,
 935                                                        &msg->buf[i]);
 936                         if (ret)
 937                                 return ret;
 938
 939                         i = i + len;
 940                 }
 941         } else if (msg->flags == SDW_MSG_FLAG_WRITE) {
 942                 for (i = 0; i < msg->len; i++) {
 943                         ret = qcom_swrm_cmd_fifo_wr_cmd(ctrl, msg->buf[i],
 944                                                         msg->dev_num,
 945                                                        msg->addr + i);
 946                         if (ret)
 947                                 return SDW_CMD_IGNORED;
 948                 }
 949         }
 950
 951         return SDW_CMD_OK;
 952 }
 953
 954 static int qcom_swrm_pre_bank_switch(struct sdw_bus *bus)
 955 {
 956         u32 reg = SWRM_MCP_FRAME_CTRL_BANK_ADDR(bus->params.next_bank);
 957         struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
 958         u32 val;
 959
 960         ctrl->reg_read(ctrl, reg, &val);
 961
 962         u32p_replace_bits(&val, ctrl->cols_index, SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK);
 963         u32p_replace_bits(&val, ctrl->rows_index, SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK);
 964
 965         return ctrl->reg_write(ctrl, reg, val);
 966 }
 967
 968 static int qcom_swrm_port_params(struct sdw_bus *bus,
 969                                  struct sdw_port_params *p_params,
 970                                  unsigned int bank)
 971 {
 972         struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
 973
 974         return ctrl->reg_write(ctrl, SWRM_DP_BLOCK_CTRL_1(p_params->num),
 975                                p_params->bps - 1);
 976
 977 }
 978
 979 static int qcom_swrm_transport_params(struct sdw_bus *bus,
 980                                       struct sdw_transport_params *params,
 981                                       enum sdw_reg_bank bank)
 982 {
 983         struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
 984         struct qcom_swrm_port_config *pcfg;
 985         u32 value;
 986         int reg = SWRM_DP_PORT_CTRL_BANK((params->port_num), bank);
 987         int ret;
 988
 989         pcfg = &ctrl->pconfig[params->port_num];
 990
 991         value = pcfg->off1 << SWRM_DP_PORT_CTRL_OFFSET1_SHFT;
 992         value |= pcfg->off2 << SWRM_DP_PORT_CTRL_OFFSET2_SHFT;
 993         value |= pcfg->si & 0xff;
 994
 995         ret = ctrl->reg_write(ctrl, reg, value);
 996         if (ret)
 997                 goto err;
 998
 999         if (pcfg->si > 0xff) {
1000                 value = (pcfg->si >> 8) & 0xff;
1001                 reg = SWRM_DP_SAMPLECTRL2_BANK(params->port_num, bank);
1002                 ret = ctrl->reg_write(ctrl, reg, value);
1003                 if (ret)
1004                         goto err;
1005         }
1006
1007         if (pcfg->lane_control != SWR_INVALID_PARAM) {
1008                 reg = SWRM_DP_PORT_CTRL_2_BANK(params->port_num, bank);
1009                 value = pcfg->lane_control;
1010                 ret = ctrl->reg_write(ctrl, reg, value);
1011                 if (ret)
1012                         goto err;
1013         }
1014
1015         if (pcfg->blk_group_count != SWR_INVALID_PARAM) {
1016                 reg = SWRM_DP_BLOCK_CTRL2_BANK(params->port_num, bank);
1017                 value = pcfg->blk_group_count;
1018                 ret = ctrl->reg_write(ctrl, reg, value);
1019                 if (ret)
1020                         goto err;
1021         }
1022
1023         if (pcfg->hstart != SWR_INVALID_PARAM
1024                         && pcfg->hstop != SWR_INVALID_PARAM) {
1025                 reg = SWRM_DP_PORT_HCTRL_BANK(params->port_num, bank);
1026                 value = (pcfg->hstop << 4) | pcfg->hstart;
1027                 ret = ctrl->reg_write(ctrl, reg, value);
1028         } else {
1029                 reg = SWRM_DP_PORT_HCTRL_BANK(params->port_num, bank);
1030                 value = (SWR_HSTOP_MAX_VAL << 4) | SWR_HSTART_MIN_VAL;
1031                 ret = ctrl->reg_write(ctrl, reg, value);
1032         }
1033
1034         if (ret)
1035                 goto err;
1036
1037         if (pcfg->bp_mode != SWR_INVALID_PARAM) {
1038                 reg = SWRM_DP_BLOCK_CTRL3_BANK(params->port_num, bank);
1039                 ret = ctrl->reg_write(ctrl, reg, pcfg->bp_mode);
1040         }
1041
1042 err:
1043         return ret;
1044 }
1045
1046 static int qcom_swrm_port_enable(struct sdw_bus *bus,
1047                                  struct sdw_enable_ch *enable_ch,
1048                                  unsigned int bank)
1049 {
1050         u32 reg = SWRM_DP_PORT_CTRL_BANK(enable_ch->port_num, bank);
1051         struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
1052         u32 val;
1053
1054         ctrl->reg_read(ctrl, reg, &val);
1055
1056         if (enable_ch->enable)
1057                 val |= (enable_ch->ch_mask << SWRM_DP_PORT_CTRL_EN_CHAN_SHFT);
1058         else
1059                 val &= ~(0xff << SWRM_DP_PORT_CTRL_EN_CHAN_SHFT);
1060
1061         return ctrl->reg_write(ctrl, reg, val);
1062 }
1063
1064 static const struct sdw_master_port_ops qcom_swrm_port_ops = {
1065         .dpn_set_port_params = qcom_swrm_port_params,
1066         .dpn_set_port_transport_params = qcom_swrm_transport_params,
1067         .dpn_port_enable_ch = qcom_swrm_port_enable,
1068 };
1069
1070 static const struct sdw_master_ops qcom_swrm_ops = {
1071         .read_prop = qcom_swrm_read_prop,
1072         .xfer_msg = qcom_swrm_xfer_msg,
1073         .pre_bank_switch = qcom_swrm_pre_bank_switch,
1074 };
1075
1076 static int qcom_swrm_compute_params(struct sdw_bus *bus)
1077 {
1078         struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
1079         struct sdw_master_runtime *m_rt;
1080         struct sdw_slave_runtime *s_rt;
1081         struct sdw_port_runtime *p_rt;
1082         struct qcom_swrm_port_config *pcfg;
1083         struct sdw_slave *slave;
1084         unsigned int m_port;
1085         int i = 1;
1086
1087         list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) {
1088                 list_for_each_entry(p_rt, &m_rt->port_list, port_node) {
1089                         pcfg = &ctrl->pconfig[p_rt->num];
1090                         p_rt->transport_params.port_num = p_rt->num;
1091                         if (pcfg->word_length != SWR_INVALID_PARAM) {
1092                                 sdw_fill_port_params(&p_rt->port_params,
1093                                              p_rt->num,  pcfg->word_length + 1,
1094                                              SDW_PORT_FLOW_MODE_ISOCH,
1095                                              SDW_PORT_DATA_MODE_NORMAL);
1096                         }
1097
1098                 }
1099
1100                 list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
1101                         slave = s_rt->slave;
1102                         list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
1103                                 m_port = slave->m_port_map[p_rt->num];
1104                                 /* port config starts at offset 0 so -1 from actual port number */
1105                                 if (m_port)
1106                                         pcfg = &ctrl->pconfig[m_port];
1107                                 else
1108                                         pcfg = &ctrl->pconfig[i];
1109                                 p_rt->transport_params.port_num = p_rt->num;
1110                                 p_rt->transport_params.sample_interval =
1111                                         pcfg->si + 1;
1112                                 p_rt->transport_params.offset1 = pcfg->off1;
1113                                 p_rt->transport_params.offset2 = pcfg->off2;
1114                                 p_rt->transport_params.blk_pkg_mode = pcfg->bp_mode;
1115                                 p_rt->transport_params.blk_grp_ctrl = pcfg->blk_group_count;
1116
1117                                 p_rt->transport_params.hstart = pcfg->hstart;
1118                                 p_rt->transport_params.hstop = pcfg->hstop;
1119                                 p_rt->transport_params.lane_ctrl = pcfg->lane_control;
1120                                 if (pcfg->word_length != SWR_INVALID_PARAM) {
1121                                         sdw_fill_port_params(&p_rt->port_params,
1122                                                      p_rt->num,
1123                                                      pcfg->word_length + 1,
1124                                                      SDW_PORT_FLOW_MODE_ISOCH,
1125                                                      SDW_PORT_DATA_MODE_NORMAL);
1126                                 }
1127                                 i++;
1128                         }
1129                 }
1130         }
1131
1132         return 0;
1133 }
1134
1135 static u32 qcom_swrm_freq_tbl[MAX_FREQ_NUM] = {
1136         DEFAULT_CLK_FREQ,
1137 };
1138
1139 static void qcom_swrm_stream_free_ports(struct qcom_swrm_ctrl *ctrl,
1140                                         struct sdw_stream_runtime *stream)
1141 {
1142         struct sdw_master_runtime *m_rt;
1143         struct sdw_port_runtime *p_rt;
1144         unsigned long *port_mask;
1145
1146         mutex_lock(&ctrl->port_lock);
1147
1148         list_for_each_entry(m_rt, &stream->master_list, stream_node) {
1149                 if (m_rt->direction == SDW_DATA_DIR_RX)
1150                         port_mask = &ctrl->dout_port_mask;
1151                 else
1152                         port_mask = &ctrl->din_port_mask;
1153
1154                 list_for_each_entry(p_rt, &m_rt->port_list, port_node)
1155                         clear_bit(p_rt->num, port_mask);
1156         }
1157
1158         mutex_unlock(&ctrl->port_lock);
1159 }
1160
1161 static int qcom_swrm_stream_alloc_ports(struct qcom_swrm_ctrl *ctrl,
1162                                         struct sdw_stream_runtime *stream,
1163                                        struct snd_pcm_hw_params *params,
1164                                        int direction)
1165 {
1166         struct sdw_port_config pconfig[QCOM_SDW_MAX_PORTS];
1167         struct sdw_stream_config sconfig;
1168         struct sdw_master_runtime *m_rt;
1169         struct sdw_slave_runtime *s_rt;
1170         struct sdw_port_runtime *p_rt;
1171         struct sdw_slave *slave;
1172         unsigned long *port_mask;
1173         int maxport, pn, nports = 0, ret = 0;
1174         unsigned int m_port;
1175
1176         if (direction == SNDRV_PCM_STREAM_CAPTURE)
1177                 sconfig.direction = SDW_DATA_DIR_TX;
1178         else
1179                 sconfig.direction = SDW_DATA_DIR_RX;
1180
1181         /* hw parameters wil be ignored as we only support PDM */
1182         sconfig.ch_count = 1;
1183         sconfig.frame_rate = params_rate(params);
1184         sconfig.type = stream->type;
1185         sconfig.bps = 1;
1186
1187         mutex_lock(&ctrl->port_lock);
1188         list_for_each_entry(m_rt, &stream->master_list, stream_node) {
1189                 /*
1190                  * For streams with multiple masters:
1191                  * Allocate ports only for devices connected to this master.
1192                  * Such devices will have ports allocated by their own master
1193                  * and its qcom_swrm_stream_alloc_ports() call.
1194                  */
1195                 if (ctrl->bus.id != m_rt->bus->id)
1196                         continue;
1197
1198                 if (m_rt->direction == SDW_DATA_DIR_RX) {
1199                         maxport = ctrl->num_dout_ports;
1200                         port_mask = &ctrl->dout_port_mask;
1201                 } else {
1202                         maxport = ctrl->num_din_ports;
1203                         port_mask = &ctrl->din_port_mask;
1204                 }
1205
1206                 list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
1207                         slave = s_rt->slave;
1208                         list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
1209                                 m_port = slave->m_port_map[p_rt->num];
1210                                 /* Port numbers start from 1 - 14*/
1211                                 if (m_port)
1212                                         pn = m_port;
1213                                 else
1214                                         pn = find_first_zero_bit(port_mask, maxport);
1215
1216                                 if (pn > maxport) {
1217                                         dev_err(ctrl->dev, "All ports busy\n");
1218                                         ret = -EBUSY;
1219                                         goto out;
1220                                 }
1221                                 set_bit(pn, port_mask);
1222                                 pconfig[nports].num = pn;
1223                                 pconfig[nports].ch_mask = p_rt->ch_mask;
1224                                 nports++;
1225                         }
1226                 }
1227         }
1228
1229         sdw_stream_add_master(&ctrl->bus, &sconfig, pconfig,
1230                               nports, stream);
1231 out:
1232         mutex_unlock(&ctrl->port_lock);
1233
1234         return ret;
1235 }
1236
1237 static int qcom_swrm_hw_params(struct snd_pcm_substream *substream,
1238                                struct snd_pcm_hw_params *params,
1239                               struct snd_soc_dai *dai)
1240 {
1241         struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
1242         struct sdw_stream_runtime *sruntime = ctrl->sruntime[dai->id];
1243         int ret;
1244
1245         ret = qcom_swrm_stream_alloc_ports(ctrl, sruntime, params,
1246                                            substream->stream);
1247         if (ret)
1248                 qcom_swrm_stream_free_ports(ctrl, sruntime);
1249
1250         return ret;
1251 }
1252
1253 static int qcom_swrm_hw_free(struct snd_pcm_substream *substream,
1254                              struct snd_soc_dai *dai)
1255 {
1256         struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
1257         struct sdw_stream_runtime *sruntime = ctrl->sruntime[dai->id];
1258
1259         qcom_swrm_stream_free_ports(ctrl, sruntime);
1260         sdw_stream_remove_master(&ctrl->bus, sruntime);
1261
1262         return 0;
1263 }
1264
1265 static int qcom_swrm_set_sdw_stream(struct snd_soc_dai *dai,
1266                                     void *stream, int direction)
1267 {
1268         struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
1269
1270         ctrl->sruntime[dai->id] = stream;
1271
1272         return 0;
1273 }
1274
1275 static void *qcom_swrm_get_sdw_stream(struct snd_soc_dai *dai, int direction)
1276 {
1277         struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
1278
1279         return ctrl->sruntime[dai->id];
1280 }
1281
1282 static int qcom_swrm_startup(struct snd_pcm_substream *substream,
1283                              struct snd_soc_dai *dai)
1284 {
1285         struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
1286         int ret;
1287
1288         ret = pm_runtime_get_sync(ctrl->dev);
1289         if (ret < 0 && ret != -EACCES) {
1290                 dev_err_ratelimited(ctrl->dev,
1291                                     "pm_runtime_get_sync failed in %s, ret %d\n",
1292                                     __func__, ret);
1293                 pm_runtime_put_noidle(ctrl->dev);
1294                 return ret;
1295         }
1296
1297         return 0;
1298 }
1299
1300 static void qcom_swrm_shutdown(struct snd_pcm_substream *substream,
1301                                struct snd_soc_dai *dai)
1302 {
1303         struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
1304
1305         swrm_wait_for_wr_fifo_done(ctrl);
1306         pm_runtime_mark_last_busy(ctrl->dev);
1307         pm_runtime_put_autosuspend(ctrl->dev);
1308
1309 }
1310
1311 static const struct snd_soc_dai_ops qcom_swrm_pdm_dai_ops = {
1312         .hw_params = qcom_swrm_hw_params,
1313         .hw_free = qcom_swrm_hw_free,
1314         .startup = qcom_swrm_startup,
1315         .shutdown = qcom_swrm_shutdown,
1316         .set_stream = qcom_swrm_set_sdw_stream,
1317         .get_stream = qcom_swrm_get_sdw_stream,
1318 };
1319
1320 static const struct snd_soc_component_driver qcom_swrm_dai_component = {
1321         .name = "soundwire",
1322 };
1323
1324 static int qcom_swrm_register_dais(struct qcom_swrm_ctrl *ctrl)
1325 {
1326         int num_dais = ctrl->num_dout_ports + ctrl->num_din_ports;
1327         struct snd_soc_dai_driver *dais;
1328         struct snd_soc_pcm_stream *stream;
1329         struct device *dev = ctrl->dev;
1330         int i;
1331
1332         /* PDM dais are only tested for now */
1333         dais = devm_kcalloc(dev, num_dais, sizeof(*dais), GFP_KERNEL);
1334         if (!dais)
1335                 return -ENOMEM;
1336
1337         for (i = 0; i < num_dais; i++) {
1338                 dais[i].name = devm_kasprintf(dev, GFP_KERNEL, "SDW Pin%d", i);
1339                 if (!dais[i].name)
1340                         return -ENOMEM;
1341
1342                 if (i < ctrl->num_dout_ports)
1343                         stream = &dais[i].playback;
1344                 else
1345                         stream = &dais[i].capture;
1346
1347                 stream->channels_min = 1;
1348                 stream->channels_max = 1;
1349                 stream->rates = SNDRV_PCM_RATE_48000;
1350                 stream->formats = SNDRV_PCM_FMTBIT_S16_LE;
1351
1352                 dais[i].ops = &qcom_swrm_pdm_dai_ops;
1353                 dais[i].id = i;
1354         }
1355
1356         return devm_snd_soc_register_component(ctrl->dev,
1357                                                 &qcom_swrm_dai_component,
1358                                                 dais, num_dais);
1359 }
1360
1361 static int qcom_swrm_get_port_config(struct qcom_swrm_ctrl *ctrl)
1362 {
1363         struct device_node *np = ctrl->dev->of_node;
1364         u8 off1[QCOM_SDW_MAX_PORTS];
1365         u8 off2[QCOM_SDW_MAX_PORTS];
1366         u16 si[QCOM_SDW_MAX_PORTS];
1367         u8 bp_mode[QCOM_SDW_MAX_PORTS] = { 0, };
1368         u8 hstart[QCOM_SDW_MAX_PORTS];
1369         u8 hstop[QCOM_SDW_MAX_PORTS];
1370         u8 word_length[QCOM_SDW_MAX_PORTS];
1371         u8 blk_group_count[QCOM_SDW_MAX_PORTS];
1372         u8 lane_control[QCOM_SDW_MAX_PORTS];
1373         int i, ret, nports, val;
1374         bool si_16 = false;
1375
1376         ctrl->reg_read(ctrl, SWRM_COMP_PARAMS, &val);
1377
1378         ctrl->num_dout_ports = FIELD_GET(SWRM_COMP_PARAMS_DOUT_PORTS_MASK, val);
1379         ctrl->num_din_ports = FIELD_GET(SWRM_COMP_PARAMS_DIN_PORTS_MASK, val);
1380
1381         ret = of_property_read_u32(np, "qcom,din-ports", &val);
1382         if (ret)
1383                 return ret;
1384
1385         if (val > ctrl->num_din_ports)
1386                 return -EINVAL;
1387
1388         ctrl->num_din_ports = val;
1389
1390         ret = of_property_read_u32(np, "qcom,dout-ports", &val);
1391         if (ret)
1392                 return ret;
1393
1394         if (val > ctrl->num_dout_ports)
1395                 return -EINVAL;
1396
1397         ctrl->num_dout_ports = val;
1398
1399         nports = ctrl->num_dout_ports + ctrl->num_din_ports;
1400         if (nports > QCOM_SDW_MAX_PORTS)
1401                 return -EINVAL;
1402
1403         /* Valid port numbers are from 1-14, so mask out port 0 explicitly */
1404         set_bit(0, &ctrl->dout_port_mask);
1405         set_bit(0, &ctrl->din_port_mask);
1406
1407         ret = of_property_read_u8_array(np, "qcom,ports-offset1",
1408                                         off1, nports);
1409         if (ret)
1410                 return ret;
1411
1412         ret = of_property_read_u8_array(np, "qcom,ports-offset2",
1413                                         off2, nports);
1414         if (ret)
1415                 return ret;
1416
1417         ret = of_property_read_u8_array(np, "qcom,ports-sinterval-low",
1418                                         (u8 *)si, nports);
1419         if (ret) {
1420                 ret = of_property_read_u16_array(np, "qcom,ports-sinterval",
1421                                                  si, nports);
1422                 if (ret)
1423                         return ret;
1424                 si_16 = true;
1425         }
1426
1427         ret = of_property_read_u8_array(np, "qcom,ports-block-pack-mode",
1428                                         bp_mode, nports);
1429         if (ret) {
1430                 if (ctrl->version <= SWRM_VERSION_1_3_0)
1431                         memset(bp_mode, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
1432                 else
1433                         return ret;
1434         }
1435
1436         memset(hstart, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
1437         of_property_read_u8_array(np, "qcom,ports-hstart", hstart, nports);
1438
1439         memset(hstop, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
1440         of_property_read_u8_array(np, "qcom,ports-hstop", hstop, nports);
1441
1442         memset(word_length, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
1443         of_property_read_u8_array(np, "qcom,ports-word-length", word_length, nports);
1444
1445         memset(blk_group_count, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
1446         of_property_read_u8_array(np, "qcom,ports-block-group-count", blk_group_count, nports);
1447
1448         memset(lane_control, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
1449         of_property_read_u8_array(np, "qcom,ports-lane-control", lane_control, nports);
1450
1451         for (i = 0; i < nports; i++) {
1452                 /* Valid port number range is from 1-14 */
1453                 if (si_16)
1454                         ctrl->pconfig[i + 1].si = si[i];
1455                 else
1456                         ctrl->pconfig[i + 1].si = ((u8 *)si)[i];
1457                 ctrl->pconfig[i + 1].off1 = off1[i];
1458                 ctrl->pconfig[i + 1].off2 = off2[i];
1459                 ctrl->pconfig[i + 1].bp_mode = bp_mode[i];
1460                 ctrl->pconfig[i + 1].hstart = hstart[i];
1461                 ctrl->pconfig[i + 1].hstop = hstop[i];
1462                 ctrl->pconfig[i + 1].word_length = word_length[i];
1463                 ctrl->pconfig[i + 1].blk_group_count = blk_group_count[i];
1464                 ctrl->pconfig[i + 1].lane_control = lane_control[i];
1465         }
1466
1467         return 0;
1468 }
1469
1470 #ifdef CONFIG_DEBUG_FS
1471 static int swrm_reg_show(struct seq_file *s_file, void *data)
1472 {
1473         struct qcom_swrm_ctrl *ctrl = s_file->private;
1474         int reg, reg_val, ret;
1475
1476         ret = pm_runtime_get_sync(ctrl->dev);
1477         if (ret < 0 && ret != -EACCES) {
1478                 dev_err_ratelimited(ctrl->dev,
1479                                     "pm_runtime_get_sync failed in %s, ret %d\n",
1480                                     __func__, ret);
1481                 pm_runtime_put_noidle(ctrl->dev);
1482                 return ret;
1483         }
1484
1485         for (reg = 0; reg <= ctrl->max_reg; reg += 4) {
1486                 ctrl->reg_read(ctrl, reg, &reg_val);
1487                 seq_printf(s_file, "0x%.3x: 0x%.2x\n", reg, reg_val);
1488         }
1489         pm_runtime_mark_last_busy(ctrl->dev);
1490         pm_runtime_put_autosuspend(ctrl->dev);
1491
1492
1493         return 0;
1494 }
1495 DEFINE_SHOW_ATTRIBUTE(swrm_reg);
1496 #endif
1497
1498 static int qcom_swrm_probe(struct platform_device *pdev)
1499 {
1500         struct device *dev = &pdev->dev;
1501         struct sdw_master_prop *prop;
1502         struct sdw_bus_params *params;
1503         struct qcom_swrm_ctrl *ctrl;
1504         const struct qcom_swrm_data *data;
1505         int ret;
1506         u32 val;
1507
1508         ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
1509         if (!ctrl)
1510                 return -ENOMEM;
1511
1512         data = of_device_get_match_data(dev);
1513         ctrl->max_reg = data->max_reg;
1514         ctrl->reg_layout = data->reg_layout;
1515         ctrl->rows_index = sdw_find_row_index(data->default_rows);
1516         ctrl->cols_index = sdw_find_col_index(data->default_cols);
1517 #if IS_REACHABLE(CONFIG_SLIMBUS)
1518         if (dev->parent->bus == &slimbus_bus) {
1519 #else
1520         if (false) {
1521 #endif
1522                 ctrl->reg_read = qcom_swrm_ahb_reg_read;
1523                 ctrl->reg_write = qcom_swrm_ahb_reg_write;
1524                 ctrl->regmap = dev_get_regmap(dev->parent, NULL);
1525                 if (!ctrl->regmap)
1526                         return -EINVAL;
1527         } else {
1528                 ctrl->reg_read = qcom_swrm_cpu_reg_read;
1529                 ctrl->reg_write = qcom_swrm_cpu_reg_write;
1530                 ctrl->mmio = devm_platform_ioremap_resource(pdev, 0);
1531                 if (IS_ERR(ctrl->mmio))
1532                         return PTR_ERR(ctrl->mmio);
1533         }
1534
1535         if (data->sw_clk_gate_required) {
1536                 ctrl->audio_cgcr = devm_reset_control_get_optional_exclusive(dev, "swr_audio_cgcr");
1537                 if (IS_ERR(ctrl->audio_cgcr)) {
1538                         dev_err(dev, "Failed to get cgcr reset ctrl required for SW gating\n");
1539                         ret = PTR_ERR(ctrl->audio_cgcr);
1540                         goto err_init;
1541                 }
1542         }
1543
1544         ctrl->irq = of_irq_get(dev->of_node, 0);
1545         if (ctrl->irq < 0) {
1546                 ret = ctrl->irq;
1547                 goto err_init;
1548         }
1549
1550         ctrl->hclk = devm_clk_get(dev, "iface");
1551         if (IS_ERR(ctrl->hclk)) {
1552                 ret = dev_err_probe(dev, PTR_ERR(ctrl->hclk), "unable to get iface clock\n");
1553                 goto err_init;
1554         }
1555
1556         clk_prepare_enable(ctrl->hclk);
1557
1558         ctrl->dev = dev;
1559         dev_set_drvdata(&pdev->dev, ctrl);
1560         mutex_init(&ctrl->port_lock);
1561         init_completion(&ctrl->broadcast);
1562         init_completion(&ctrl->enumeration);
1563
1564         ctrl->bus.ops = &qcom_swrm_ops;
1565         ctrl->bus.port_ops = &qcom_swrm_port_ops;
1566         ctrl->bus.compute_params = &qcom_swrm_compute_params;
1567         ctrl->bus.clk_stop_timeout = 300;
1568
1569         ret = qcom_swrm_get_port_config(ctrl);
1570         if (ret)
1571                 goto err_clk;
1572
1573         params = &ctrl->bus.params;
1574         params->max_dr_freq = DEFAULT_CLK_FREQ;
1575         params->curr_dr_freq = DEFAULT_CLK_FREQ;
1576         params->col = data->default_cols;
1577         params->row = data->default_rows;
1578         ctrl->reg_read(ctrl, SWRM_MCP_STATUS, &val);
1579         params->curr_bank = val & SWRM_MCP_STATUS_BANK_NUM_MASK;
1580         params->next_bank = !params->curr_bank;
1581
1582         prop = &ctrl->bus.prop;
1583         prop->max_clk_freq = DEFAULT_CLK_FREQ;
1584         prop->num_clk_gears = 0;
1585         prop->num_clk_freq = MAX_FREQ_NUM;
1586         prop->clk_freq = &qcom_swrm_freq_tbl[0];
1587         prop->default_col = data->default_cols;
1588         prop->default_row = data->default_rows;
1589
1590         ctrl->reg_read(ctrl, SWRM_COMP_HW_VERSION, &ctrl->version);
1591
1592         ret = devm_request_threaded_irq(dev, ctrl->irq, NULL,
1593                                         qcom_swrm_irq_handler,
1594                                         IRQF_TRIGGER_RISING |
1595                                         IRQF_ONESHOT,
1596                                         "soundwire", ctrl);
1597         if (ret) {
1598                 dev_err(dev, "Failed to request soundwire irq\n");
1599                 goto err_clk;
1600         }
1601
1602         ctrl->wake_irq = of_irq_get(dev->of_node, 1);
1603         if (ctrl->wake_irq > 0) {
1604                 ret = devm_request_threaded_irq(dev, ctrl->wake_irq, NULL,
1605                                                 qcom_swrm_wake_irq_handler,
1606                                                 IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
1607                                                 "swr_wake_irq", ctrl);
1608                 if (ret) {
1609                         dev_err(dev, "Failed to request soundwire wake irq\n");
1610                         goto err_init;
1611                 }
1612         }
1613
1614         ctrl->bus.controller_id = -1;
1615
1616         if (ctrl->version > SWRM_VERSION_1_3_0) {
1617                 ctrl->reg_read(ctrl, SWRM_COMP_MASTER_ID, &val);
1618                 ctrl->bus.controller_id = val;
1619         }
1620
1621         ret = sdw_bus_master_add(&ctrl->bus, dev, dev->fwnode);
1622         if (ret) {
1623                 dev_err(dev, "Failed to register Soundwire controller (%d)\n",
1624                         ret);
1625                 goto err_clk;
1626         }
1627
1628         qcom_swrm_init(ctrl);
1629         wait_for_completion_timeout(&ctrl->enumeration,
1630                                     msecs_to_jiffies(TIMEOUT_MS));
1631         ret = qcom_swrm_register_dais(ctrl);
1632         if (ret)
1633                 goto err_master_add;
1634
1635         dev_info(dev, "Qualcomm Soundwire controller v%x.%x.%x Registered\n",
1636                  (ctrl->version >> 24) & 0xff, (ctrl->version >> 16) & 0xff,
1637                  ctrl->version & 0xffff);
1638
1639         pm_runtime_set_autosuspend_delay(dev, 3000);
1640         pm_runtime_use_autosuspend(dev);
1641         pm_runtime_mark_last_busy(dev);
1642         pm_runtime_set_active(dev);
1643         pm_runtime_enable(dev);
1644
1645 #ifdef CONFIG_DEBUG_FS
1646         ctrl->debugfs = debugfs_create_dir("qualcomm-sdw", ctrl->bus.debugfs);
1647         debugfs_create_file("qualcomm-registers", 0400, ctrl->debugfs, ctrl,
1648                             &swrm_reg_fops);
1649 #endif
1650
1651         return 0;
1652
1653 err_master_add:
1654         sdw_bus_master_delete(&ctrl->bus);
1655 err_clk:
1656         clk_disable_unprepare(ctrl->hclk);
1657 err_init:
1658         return ret;
1659 }
1660
1661 static void qcom_swrm_remove(struct platform_device *pdev)
1662 {
1663         struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(&pdev->dev);
1664
1665         sdw_bus_master_delete(&ctrl->bus);
1666         clk_disable_unprepare(ctrl->hclk);
1667 }
1668
1669 static int __maybe_unused swrm_runtime_resume(struct device *dev)
1670 {
1671         struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dev);
1672         int ret;
1673
1674         if (ctrl->wake_irq > 0) {
1675                 if (!irqd_irq_disabled(irq_get_irq_data(ctrl->wake_irq)))
1676                         disable_irq_nosync(ctrl->wake_irq);
1677         }
1678
1679         clk_prepare_enable(ctrl->hclk);
1680
1681         if (ctrl->clock_stop_not_supported) {
1682                 reinit_completion(&ctrl->enumeration);
1683                 ctrl->reg_write(ctrl, SWRM_COMP_SW_RESET, 0x01);
1684                 usleep_range(100, 105);
1685
1686                 qcom_swrm_init(ctrl);
1687
1688                 usleep_range(100, 105);
1689                 if (!swrm_wait_for_frame_gen_enabled(ctrl))
1690                         dev_err(ctrl->dev, "link failed to connect\n");
1691
1692                 /* wait for hw enumeration to complete */
1693                 wait_for_completion_timeout(&ctrl->enumeration,
1694                                             msecs_to_jiffies(TIMEOUT_MS));
1695                 qcom_swrm_get_device_status(ctrl);
1696                 sdw_handle_slave_status(&ctrl->bus, ctrl->status);
1697         } else {
1698                 reset_control_reset(ctrl->audio_cgcr);
1699
1700                 if (ctrl->version == SWRM_VERSION_1_7_0) {
1701                         ctrl->reg_write(ctrl, SWRM_LINK_MANAGER_EE, SWRM_EE_CPU);
1702                         ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL,
1703                                         SWRM_MCP_BUS_CLK_START << SWRM_EE_CPU);
1704                 } else if (ctrl->version >= SWRM_VERSION_2_0_0) {
1705                         ctrl->reg_write(ctrl, SWRM_LINK_MANAGER_EE, SWRM_EE_CPU);
1706                         ctrl->reg_write(ctrl, SWRM_V2_0_CLK_CTRL,
1707                                         SWRM_V2_0_CLK_CTRL_CLK_START);
1708                 } else {
1709                         ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL, SWRM_MCP_BUS_CLK_START);
1710                 }
1711                 ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_CLEAR],
1712                         SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET);
1713
1714                 ctrl->intr_mask |= SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET;
1715                 if (ctrl->version < SWRM_VERSION_2_0_0)
1716                         ctrl->reg_write(ctrl,
1717                                         ctrl->reg_layout[SWRM_REG_INTERRUPT_MASK_ADDR],
1718                                         ctrl->intr_mask);
1719                 ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_CPU_EN],
1720                                 ctrl->intr_mask);
1721
1722                 usleep_range(100, 105);
1723                 if (!swrm_wait_for_frame_gen_enabled(ctrl))
1724                         dev_err(ctrl->dev, "link failed to connect\n");
1725
1726                 ret = sdw_bus_exit_clk_stop(&ctrl->bus);
1727                 if (ret < 0)
1728                         dev_err(ctrl->dev, "bus failed to exit clock stop %d\n", ret);
1729         }
1730
1731         return 0;
1732 }
1733
1734 static int __maybe_unused swrm_runtime_suspend(struct device *dev)
1735 {
1736         struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dev);
1737         int ret;
1738
1739         swrm_wait_for_wr_fifo_done(ctrl);
1740         if (!ctrl->clock_stop_not_supported) {
1741                 /* Mask bus clash interrupt */
1742                 ctrl->intr_mask &= ~SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET;
1743                 if (ctrl->version < SWRM_VERSION_2_0_0)
1744                         ctrl->reg_write(ctrl,
1745                                         ctrl->reg_layout[SWRM_REG_INTERRUPT_MASK_ADDR],
1746                                         ctrl->intr_mask);
1747                 ctrl->reg_write(ctrl, ctrl->reg_layout[SWRM_REG_INTERRUPT_CPU_EN],
1748                                 ctrl->intr_mask);
1749                 /* Prepare slaves for clock stop */
1750                 ret = sdw_bus_prep_clk_stop(&ctrl->bus);
1751                 if (ret < 0 && ret != -ENODATA) {
1752                         dev_err(dev, "prepare clock stop failed %d", ret);
1753                         return ret;
1754                 }
1755
1756                 ret = sdw_bus_clk_stop(&ctrl->bus);
1757                 if (ret < 0 && ret != -ENODATA) {
1758                         dev_err(dev, "bus clock stop failed %d", ret);
1759                         return ret;
1760                 }
1761         }
1762
1763         clk_disable_unprepare(ctrl->hclk);
1764
1765         usleep_range(300, 305);
1766
1767         if (ctrl->wake_irq > 0) {
1768                 if (irqd_irq_disabled(irq_get_irq_data(ctrl->wake_irq)))
1769                         enable_irq(ctrl->wake_irq);
1770         }
1771
1772         return 0;
1773 }
1774
1775 static const struct dev_pm_ops swrm_dev_pm_ops = {
1776         SET_RUNTIME_PM_OPS(swrm_runtime_suspend, swrm_runtime_resume, NULL)
1777 };
1778
1779 static const struct of_device_id qcom_swrm_of_match[] = {
1780         { .compatible = "qcom,soundwire-v1.3.0", .data = &swrm_v1_3_data },
1781         { .compatible = "qcom,soundwire-v1.5.1", .data = &swrm_v1_5_data },
1782         { .compatible = "qcom,soundwire-v1.6.0", .data = &swrm_v1_6_data },
1783         { .compatible = "qcom,soundwire-v1.7.0", .data = &swrm_v1_5_data },
1784         { .compatible = "qcom,soundwire-v2.0.0", .data = &swrm_v2_0_data },
1785         {/* sentinel */},
1786 };
1787
1788 MODULE_DEVICE_TABLE(of, qcom_swrm_of_match);
1789
1790 static struct platform_driver qcom_swrm_driver = {
1791         .probe  = &qcom_swrm_probe,
1792         .remove_new = qcom_swrm_remove,
1793         .driver = {
1794                 .name   = "qcom-soundwire",
1795                 .of_match_table = qcom_swrm_of_match,
1796                 .pm = &swrm_dev_pm_ops,
1797         }
1798 };
1799 module_platform_driver(qcom_swrm_driver);
1800
1801 MODULE_DESCRIPTION("Qualcomm soundwire driver");
1802 MODULE_LICENSE("GPL v2");