include/usb/ulpi.h

   1 /*
   2  * Generic ULPI interface.
   3  *
   4  * Copyright (C) 2011 Jana Rapava <fermata7@gmail.com>
   5  * Copyright (C) 2011 CompuLab, Ltd. <www.compulab.co.il>
   6  *
   7  * Authors: Jana Rapava <fermata7@gmail.com>
   8  *          Igor Grinberg <grinberg@compulab.co.il>
   9  *
  10  * Register offsets taken from:
  11  * linux/include/linux/usb/ulpi.h
  12  *
  13  * Original Copyrights follow:
  14  * Copyright (C) 2010 Nokia Corporation
  15  *
  16  * SPDX-License-Identifier:     GPL-2.0
  17  */
  18
  19 #ifndef __USB_ULPI_H__
  20 #define __USB_ULPI_H__
  21
  22 #define ULPI_ERROR      (1 << 8) /* overflow from any register value */
  23
  24 #ifndef CONFIG_USB_ULPI_TIMEOUT
  25 #define CONFIG_USB_ULPI_TIMEOUT 1000    /* timeout in us */
  26 #endif
  27
  28 /*
  29  * ulpi view port address and
  30  * Port_number that can be passed.
  31  * Any additional data to be passed can
  32  * be extended from this structure
  33  */
  34 struct ulpi_viewport {
  35         u32 viewport_addr;
  36         u32 port_num;
  37 };
  38
  39 /*
  40  * Initialize the ULPI transciever and check the interface integrity.
  41  * @ulpi_vp -  structure containing ULPI viewport data
  42  *
  43  * returns 0 on success, ULPI_ERROR on failure.
  44  */
  45 int ulpi_init(struct ulpi_viewport *ulpi_vp);
  46
  47 /*
  48  * Select transceiver speed.
  49  * @speed       - ULPI_FC_HIGH_SPEED, ULPI_FC_FULL_SPEED (default),
  50  *                ULPI_FC_LOW_SPEED,  ULPI_FC_FS4LS
  51  * returns 0 on success, ULPI_ERROR on failure.
  52  */
  53 int ulpi_select_transceiver(struct ulpi_viewport *ulpi_vp, unsigned speed);
  54
  55 /*
  56  * Enable/disable VBUS.
  57  * @ext_power           - external VBUS supply is used (default is false)
  58  * @ext_indicator       - external VBUS over-current indicator is used
  59  *
  60  * returns 0 on success, ULPI_ERROR on failure.
  61  */
  62 int ulpi_set_vbus(struct ulpi_viewport *ulpi_vp, int on, int ext_power);
  63
  64 /*
  65  * Configure VBUS indicator
  66  * @external            - external VBUS over-current indicator is used
  67  * @passthru            - disables ANDing of internal VBUS comparator
  68  *                    with external VBUS input
  69  * @complement          - inverts the external VBUS input
  70  */
  71 int ulpi_set_vbus_indicator(struct ulpi_viewport *ulpi_vp, int external,
  72                         int passthru, int complement);
  73
  74 /*
  75  * Enable/disable pull-down resistors on D+ and D- USB lines.
  76  *
  77  * returns 0 on success, ULPI_ERROR on failure.
  78  */
  79 int ulpi_set_pd(struct ulpi_viewport *ulpi_vp, int enable);
  80
  81 /*
  82  * Select OpMode.
  83  * @opmode      - ULPI_FC_OPMODE_NORMAL (default), ULPI_FC_OPMODE_NONDRIVING,
  84  *                ULPI_FC_OPMODE_DISABLE_NRZI,     ULPI_FC_OPMODE_NOSYNC_NOEOP
  85  *
  86  * returns 0 on success, ULPI_ERROR on failure.
  87  */
  88 int ulpi_opmode_sel(struct ulpi_viewport *ulpi_vp, unsigned opmode);
  89
  90 /*
  91  * Switch to Serial Mode.
  92  * @smode       - ULPI_IFACE_6_PIN_SERIAL_MODE or ULPI_IFACE_3_PIN_SERIAL_MODE
  93  *
  94  * returns 0 on success, ULPI_ERROR on failure.
  95  *
  96  * Notes:
  97  * Switches immediately to Serial Mode.
  98  * To return from Serial Mode, STP line needs to be asserted.
  99  */
 100 int ulpi_serial_mode_enable(struct ulpi_viewport *ulpi_vp, unsigned smode);
 101
 102 /*
 103  * Put PHY into low power mode.
 104  *
 105  * returns 0 on success, ULPI_ERROR on failure.
 106  *
 107  * Notes:
 108  * STP line must be driven low to keep the PHY in suspend.
 109  * To resume the PHY, STP line needs to be asserted.
 110  */
 111 int ulpi_suspend(struct ulpi_viewport *ulpi_vp);
 112
 113 /*
 114  * Reset the transceiver. ULPI interface and registers are not affected.
 115  *
 116  * returns 0 on success, ULPI_ERROR on failure.
 117  */
 118 int ulpi_reset(struct ulpi_viewport *ulpi_vp);
 119
 120
 121 /* ULPI access methods below must be implemented for each ULPI viewport. */
 122
 123 /*
 124  * Write to the ULPI PHY register via the viewport.
 125  * @reg         - the ULPI register (one of the fields in struct ulpi_regs).
 126  * @value       - the value - only 8 lower bits are used, others ignored.
 127  *
 128  * returns 0 on success, ULPI_ERROR on failure.
 129  */
 130 int ulpi_write(struct ulpi_viewport *ulpi_vp, u8 *reg, u32 value);
 131
 132 /*
 133  * Read the ULPI PHY register content via the viewport.
 134  * @reg         - the ULPI register (one of the fields in struct ulpi_regs).
 135  *
 136  * returns register content on success, ULPI_ERROR on failure.
 137  */
 138 u32 ulpi_read(struct ulpi_viewport *ulpi_vp, u8 *reg);
 139
 140 /*
 141  * Wait for the reset to complete.
 142  * The Link must not attempt to access the PHY until the reset has
 143  * completed and DIR line is de-asserted.
 144  */
 145 int ulpi_reset_wait(struct ulpi_viewport *ulpi_vp);
 146
 147 /* Access Extended Register Set (indicator) */
 148 #define ACCESS_EXT_REGS_OFFSET  0x2f    /* read-write */
 149 /* Vendor-specific */
 150 #define VENDOR_SPEC_OFFSET      0x30
 151
 152 /*
 153  * Extended Register Set
 154  *
 155  * Addresses 0x00-0x3F map directly to Immediate Register Set.
 156  * Addresses 0x40-0x7F are reserved.
 157  * Addresses 0x80-0xff are vendor-specific.
 158  */
 159 #define EXT_VENDOR_SPEC_OFFSET  0x80
 160
 161 /* ULPI registers, bits and offsets definitions */
 162 struct ulpi_regs {
 163         /* Vendor ID and Product ID: 0x00 - 0x03 Read-only */
 164         u8      vendor_id_low;
 165         u8      vendor_id_high;
 166         u8      product_id_low;
 167         u8      product_id_high;
 168         /* Function Control: 0x04 - 0x06 Read */
 169         u8      function_ctrl;          /* 0x04 Write */
 170         u8      function_ctrl_set;      /* 0x05 Set */
 171         u8      function_ctrl_clear;    /* 0x06 Clear */
 172         /* Interface Control: 0x07 - 0x09 Read */
 173         u8      iface_ctrl;             /* 0x07 Write */
 174         u8      iface_ctrl_set;         /* 0x08 Set */
 175         u8      iface_ctrl_clear;       /* 0x09 Clear */
 176         /* OTG Control: 0x0A - 0x0C Read */
 177         u8      otg_ctrl;               /* 0x0A Write */
 178         u8      otg_ctrl_set;           /* 0x0B Set */
 179         u8      otg_ctrl_clear;         /* 0x0C Clear */
 180         /* USB Interrupt Enable Rising: 0x0D - 0x0F Read */
 181         u8      usb_ie_rising;          /* 0x0D Write */
 182         u8      usb_ie_rising_set;      /* 0x0E Set */
 183         u8      usb_ie_rising_clear;    /* 0x0F Clear */
 184         /* USB Interrupt Enable Falling: 0x10 - 0x12 Read */
 185         u8      usb_ie_falling;         /* 0x10 Write */
 186         u8      usb_ie_falling_set;     /* 0x11 Set */
 187         u8      usb_ie_falling_clear;   /* 0x12 Clear */
 188         /* USB Interrupt Status: 0x13 Read-only */
 189         u8      usb_int_status;
 190         /* USB Interrupt Latch: 0x14 Read-only with auto-clear */
 191         u8      usb_int_latch;
 192         /* Debug: 0x15 Read-only */
 193         u8      debug;
 194         /* Scratch Register: 0x16 - 0x18 Read */
 195         u8      scratch;                /* 0x16 Write */
 196         u8      scratch_set;            /* 0x17 Set */
 197         u8      scratch_clear;          /* 0x18 Clear */
 198         /*
 199          * Optional Carkit registers:
 200          * Carkit Control: 0x19 - 0x1B Read
 201          */
 202         u8      carkit_ctrl;            /* 0x19 Write */
 203         u8      carkit_ctrl_set;        /* 0x1A Set */
 204         u8      carkit_ctrl_clear;      /* 0x1B Clear */
 205         /* Carkit Interrupt Delay: 0x1C Read, Write */
 206         u8      carkit_int_delay;
 207         /* Carkit Interrupt Enable: 0x1D - 0x1F Read */
 208         u8      carkit_ie;              /* 0x1D Write */
 209         u8      carkit_ie_set;          /* 0x1E Set */
 210         u8      carkit_ie_clear;        /* 0x1F Clear */
 211         /* Carkit Interrupt Status: 0x20 Read-only */
 212         u8      carkit_int_status;
 213         /* Carkit Interrupt Latch: 0x21 Read-only with auto-clear */
 214         u8      carkit_int_latch;
 215         /* Carkit Pulse Control: 0x22 - 0x24 Read */
 216         u8      carkit_pulse_ctrl;              /* 0x22 Write */
 217         u8      carkit_pulse_ctrl_set;          /* 0x23 Set */
 218         u8      carkit_pulse_ctrl_clear;        /* 0x24 Clear */
 219         /*
 220          * Other optional registers:
 221          * Transmit Positive Width: 0x25 Read, Write
 222          */
 223         u8      transmit_pos_width;
 224         /* Transmit Negative Width: 0x26 Read, Write */
 225         u8      transmit_neg_width;
 226         /* Receive Polarity Recovery: 0x27 Read, Write */
 227         u8      recv_pol_recovery;
 228         /*
 229          * Addresses 0x28 - 0x2E are reserved, so we use offsets
 230          * for immediate registers with higher addresses
 231          */
 232 };
 233
 234 /*
 235  * Register Bits
 236  */
 237
 238 /* Function Control */
 239 #define ULPI_FC_XCVRSEL_MASK            (3 << 0)
 240 #define ULPI_FC_HIGH_SPEED              (0 << 0)
 241 #define ULPI_FC_FULL_SPEED              (1 << 0)
 242 #define ULPI_FC_LOW_SPEED               (2 << 0)
 243 #define ULPI_FC_FS4LS                   (3 << 0)
 244 #define ULPI_FC_TERMSELECT              (1 << 2)
 245 #define ULPI_FC_OPMODE_MASK             (3 << 3)
 246 #define ULPI_FC_OPMODE_NORMAL           (0 << 3)
 247 #define ULPI_FC_OPMODE_NONDRIVING       (1 << 3)
 248 #define ULPI_FC_OPMODE_DISABLE_NRZI     (2 << 3)
 249 #define ULPI_FC_OPMODE_NOSYNC_NOEOP     (3 << 3)
 250 #define ULPI_FC_RESET                   (1 << 5)
 251 #define ULPI_FC_SUSPENDM                (1 << 6)
 252
 253 /* Interface Control */
 254 #define ULPI_IFACE_6_PIN_SERIAL_MODE    (1 << 0)
 255 #define ULPI_IFACE_3_PIN_SERIAL_MODE    (1 << 1)
 256 #define ULPI_IFACE_CARKITMODE           (1 << 2)
 257 #define ULPI_IFACE_CLOCKSUSPENDM        (1 << 3)
 258 #define ULPI_IFACE_AUTORESUME           (1 << 4)
 259 #define ULPI_IFACE_EXTVBUS_COMPLEMENT   (1 << 5)
 260 #define ULPI_IFACE_PASSTHRU             (1 << 6)
 261 #define ULPI_IFACE_PROTECT_IFC_DISABLE  (1 << 7)
 262
 263 /* OTG Control */
 264 #define ULPI_OTG_ID_PULLUP              (1 << 0)
 265 #define ULPI_OTG_DP_PULLDOWN            (1 << 1)
 266 #define ULPI_OTG_DM_PULLDOWN            (1 << 2)
 267 #define ULPI_OTG_DISCHRGVBUS            (1 << 3)
 268 #define ULPI_OTG_CHRGVBUS               (1 << 4)
 269 #define ULPI_OTG_DRVVBUS                (1 << 5)
 270 #define ULPI_OTG_DRVVBUS_EXT            (1 << 6)
 271 #define ULPI_OTG_EXTVBUSIND             (1 << 7)
 272
 273 /*
 274  * USB Interrupt Enable Rising,
 275  * USB Interrupt Enable Falling,
 276  * USB Interrupt Status and
 277  * USB Interrupt Latch
 278  */
 279 #define ULPI_INT_HOST_DISCONNECT        (1 << 0)
 280 #define ULPI_INT_VBUS_VALID             (1 << 1)
 281 #define ULPI_INT_SESS_VALID             (1 << 2)
 282 #define ULPI_INT_SESS_END               (1 << 3)
 283 #define ULPI_INT_IDGRD                  (1 << 4)
 284
 285 /* Debug */
 286 #define ULPI_DEBUG_LINESTATE0           (1 << 0)
 287 #define ULPI_DEBUG_LINESTATE1           (1 << 1)
 288
 289 /* Carkit Control */
 290 #define ULPI_CARKIT_CTRL_CARKITPWR              (1 << 0)
 291 #define ULPI_CARKIT_CTRL_IDGNDDRV               (1 << 1)
 292 #define ULPI_CARKIT_CTRL_TXDEN                  (1 << 2)
 293 #define ULPI_CARKIT_CTRL_RXDEN                  (1 << 3)
 294 #define ULPI_CARKIT_CTRL_SPKLEFTEN              (1 << 4)
 295 #define ULPI_CARKIT_CTRL_SPKRIGHTEN             (1 << 5)
 296 #define ULPI_CARKIT_CTRL_MICEN                  (1 << 6)
 297
 298 /* Carkit Interrupt Enable */
 299 #define ULPI_CARKIT_INT_EN_IDFLOAT_RISE         (1 << 0)
 300 #define ULPI_CARKIT_INT_EN_IDFLOAT_FALL         (1 << 1)
 301 #define ULPI_CARKIT_INT_EN_CARINTDET            (1 << 2)
 302 #define ULPI_CARKIT_INT_EN_DP_RISE              (1 << 3)
 303 #define ULPI_CARKIT_INT_EN_DP_FALL              (1 << 4)
 304
 305 /* Carkit Interrupt Status and Latch */
 306 #define ULPI_CARKIT_INT_IDFLOAT                 (1 << 0)
 307 #define ULPI_CARKIT_INT_CARINTDET               (1 << 1)
 308 #define ULPI_CARKIT_INT_DP                      (1 << 2)
 309
 310 /* Carkit Pulse Control*/
 311 #define ULPI_CARKIT_PLS_CTRL_TXPLSEN            (1 << 0)
 312 #define ULPI_CARKIT_PLS_CTRL_RXPLSEN            (1 << 1)
 313 #define ULPI_CARKIT_PLS_CTRL_SPKRLEFT_BIASEN    (1 << 2)
 314 #define ULPI_CARKIT_PLS_CTRL_SPKRRIGHT_BIASEN   (1 << 3)
 315
 316
 317 #endif /* __USB_ULPI_H__ */