drivers/usb/cdns3/drd.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Cadence USB3 DRD header file.
   4  *
   5  * Copyright (C) 2018-2019 Cadence.
   6  *
   7  * Author: Pawel Laszczak <pawell@cadence.com>
   8  */
   9 #ifndef __LINUX_CDNS3_DRD
  10 #define __LINUX_CDNS3_DRD
  11
  12 #include <linux/usb/otg.h>
  13 #include <linux/phy/phy.h>
  14 #include "core.h"
  15
  16 /*  DRD register interface for version v1. */
  17 struct cdns3_otg_regs {
  18         __le32 did;
  19         __le32 rid;
  20         __le32 capabilities;
  21         __le32 reserved1;
  22         __le32 cmd;
  23         __le32 sts;
  24         __le32 state;
  25         __le32 reserved2;
  26         __le32 ien;
  27         __le32 ivect;
  28         __le32 refclk;
  29         __le32 tmr;
  30         __le32 reserved3[4];
  31         __le32 simulate;
  32         __le32 override;
  33         __le32 susp_ctrl;
  34         __le32 reserved4;
  35         __le32 anasts;
  36         __le32 adp_ramp_time;
  37         __le32 ctrl1;
  38         __le32 ctrl2;
  39 };
  40
  41 /*  DRD register interface for version v0. */
  42 struct cdns3_otg_legacy_regs {
  43         __le32 cmd;
  44         __le32 sts;
  45         __le32 state;
  46         __le32 refclk;
  47         __le32 ien;
  48         __le32 ivect;
  49         __le32 reserved1[3];
  50         __le32 tmr;
  51         __le32 reserved2[2];
  52         __le32 version;
  53         __le32 capabilities;
  54         __le32 reserved3[2];
  55         __le32 simulate;
  56         __le32 reserved4[5];
  57         __le32 ctrl1;
  58 };
  59
  60 /*
  61  * Common registers interface for both version of DRD.
  62  */
  63 struct cdns3_otg_common_regs {
  64         __le32 cmd;
  65         __le32 sts;
  66         __le32 state;
  67         __le32 different1;
  68         __le32 ien;
  69         __le32 ivect;
  70 };
  71
  72 /* CDNS_RID - bitmasks */
  73 #define CDNS_RID(p)                     ((p) & GENMASK(15, 0))
  74
  75 /* CDNS_VID - bitmasks */
  76 #define CDNS_DID(p)                     ((p) & GENMASK(31, 0))
  77
  78 /* OTGCMD - bitmasks */
  79 /* "Request the bus for Device mode. */
  80 #define OTGCMD_DEV_BUS_REQ              BIT(0)
  81 /* Request the bus for Host mode */
  82 #define OTGCMD_HOST_BUS_REQ             BIT(1)
  83 /* Enable OTG mode. */
  84 #define OTGCMD_OTG_EN                   BIT(2)
  85 /* Disable OTG mode */
  86 #define OTGCMD_OTG_DIS                  BIT(3)
  87 /*"Configure OTG as A-Device. */
  88 #define OTGCMD_A_DEV_EN                 BIT(4)
  89 /*"Configure OTG as A-Device. */
  90 #define OTGCMD_A_DEV_DIS                BIT(5)
  91 /* Drop the bus for Device mod  e. */
  92 #define OTGCMD_DEV_BUS_DROP             BIT(8)
  93 /* Drop the bus for Host mode*/
  94 #define OTGCMD_HOST_BUS_DROP            BIT(9)
  95 /* Power Down USBSS-DEV. */
  96 #define OTGCMD_DEV_POWER_OFF            BIT(11)
  97 /* Power Down CDNSXHCI. */
  98 #define OTGCMD_HOST_POWER_OFF           BIT(12)
  99
 100 /* OTGIEN - bitmasks */
 101 /* ID change interrupt enable */
 102 #define OTGIEN_ID_CHANGE_INT            BIT(0)
 103 /* Vbusvalid fall detected interrupt enable.*/
 104 #define OTGIEN_VBUSVALID_RISE_INT       BIT(4)
 105 /* Vbusvalid fall detected interrupt enable */
 106 #define OTGIEN_VBUSVALID_FALL_INT       BIT(5)
 107
 108 /* OTGSTS - bitmasks */
 109 /*
 110  * Current value of the ID pin. It is only valid when idpullup in
 111  *  OTGCTRL1_TYPE register is set to '1'.
 112  */
 113 #define OTGSTS_ID_VALUE                 BIT(0)
 114 /* Current value of the vbus_valid */
 115 #define OTGSTS_VBUS_VALID               BIT(1)
 116 /* Current value of the b_sess_vld */
 117 #define OTGSTS_SESSION_VALID            BIT(2)
 118 /*Device mode is active*/
 119 #define OTGSTS_DEV_ACTIVE               BIT(3)
 120 /* Host mode is active. */
 121 #define OTGSTS_HOST_ACTIVE              BIT(4)
 122 /* OTG Controller not ready. */
 123 #define OTGSTS_OTG_NRDY_MASK            BIT(11)
 124 #define OTGSTS_OTG_NRDY(p)              ((p) & OTGSTS_OTG_NRDY_MASK)
 125 /*
 126  * Value of the strap pins.
 127  * 000 - no default configuration
 128  * 010 - Controller initiall configured as Host
 129  * 100 - Controller initially configured as Device
 130  */
 131 #define OTGSTS_STRAP(p)                 (((p) & GENMASK(14, 12)) >> 12)
 132 #define OTGSTS_STRAP_NO_DEFAULT_CFG     0x00
 133 #define OTGSTS_STRAP_HOST_OTG           0x01
 134 #define OTGSTS_STRAP_HOST               0x02
 135 #define OTGSTS_STRAP_GADGET             0x04
 136 /* Host mode is turned on. */
 137 #define OTGSTS_XHCI_READY               BIT(26)
 138 /* "Device mode is turned on .*/
 139 #define OTGSTS_DEV_READY                BIT(27)
 140
 141 /* OTGSTATE- bitmasks */
 142 #define OTGSTATE_DEV_STATE_MASK         GENMASK(2, 0)
 143 #define OTGSTATE_HOST_STATE_MASK        GENMASK(5, 3)
 144 #define OTGSTATE_HOST_STATE_IDLE        0x0
 145 #define OTGSTATE_HOST_STATE_VBUS_FALL   0x7
 146 #define OTGSTATE_HOST_STATE(p)          (((p) & OTGSTATE_HOST_STATE_MASK) >> 3)
 147
 148 /* OTGREFCLK - bitmasks */
 149 #define OTGREFCLK_STB_CLK_SWITCH_EN     BIT(31)
 150
 151 /* OVERRIDE - bitmasks */
 152 #define OVERRIDE_IDPULLUP               BIT(0)
 153 /* Only for CDNS3_CONTROLLER_V0 version */
 154 #define OVERRIDE_IDPULLUP_V0            BIT(24)
 155
 156 int cdns3_is_host(struct cdns3 *cdns);
 157 int cdns3_is_device(struct cdns3 *cdns);
 158 int cdns3_get_id(struct cdns3 *cdns);
 159 int cdns3_get_vbus(struct cdns3 *cdns);
 160 int cdns3_drd_init(struct cdns3 *cdns);
 161 int cdns3_drd_exit(struct cdns3 *cdns);
 162 int cdns3_drd_update_mode(struct cdns3 *cdns);
 163 int cdns3_drd_switch_gadget(struct cdns3 *cdns, int on);
 164 int cdns3_drd_switch_host(struct cdns3 *cdns, int on);
 165 int cdns3_set_mode(struct cdns3 *cdns, enum usb_dr_mode mode);
 166
 167 #endif /* __LINUX_CDNS3_DRD */