include/linux/usb/intel_mid_otg.h

   1 /*
   2  * Intel MID (Langwell/Penwell) USB OTG Transceiver driver
   3  * Copyright (C) 2008 - 2010, Intel Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  */
  19
  20 #ifndef __INTEL_MID_OTG_H
  21 #define __INTEL_MID_OTG_H
  22
  23 #include <linux/pm.h>
  24 #include <linux/usb/otg.h>
  25 #include <linux/notifier.h>
  26
  27 struct intel_mid_otg_xceiv;
  28
  29 /* This is a common data structure for Intel MID platform to
  30  * save values of the OTG state machine */
  31 struct otg_hsm {
  32         /* Input */
  33         int a_bus_resume;
  34         int a_bus_suspend;
  35         int a_conn;
  36         int a_sess_vld;
  37         int a_srp_det;
  38         int a_vbus_vld;
  39         int b_bus_resume;
  40         int b_bus_suspend;
  41         int b_conn;
  42         int b_se0_srp;
  43         int b_ssend_srp;
  44         int b_sess_end;
  45         int b_sess_vld;
  46         int id;
  47 /* id values */
  48 #define ID_B            0x05
  49 #define ID_A            0x04
  50 #define ID_ACA_C        0x03
  51 #define ID_ACA_B        0x02
  52 #define ID_ACA_A        0x01
  53         int power_up;
  54         int adp_change;
  55         int test_device;
  56
  57         /* Internal variables */
  58         int a_set_b_hnp_en;
  59         int b_srp_done;
  60         int b_hnp_enable;
  61         int hnp_poll_enable;
  62
  63         /* Timeout indicator for timers */
  64         int a_wait_vrise_tmout;
  65         int a_wait_bcon_tmout;
  66         int a_aidl_bdis_tmout;
  67         int a_bidl_adis_tmout;
  68         int a_bidl_adis_tmr;
  69         int a_wait_vfall_tmout;
  70         int b_ase0_brst_tmout;
  71         int b_bus_suspend_tmout;
  72         int b_srp_init_tmout;
  73         int b_srp_fail_tmout;
  74         int b_srp_fail_tmr;
  75         int b_adp_sense_tmout;
  76
  77         /* Informative variables */
  78         int a_bus_drop;
  79         int a_bus_req;
  80         int a_clr_err;
  81         int b_bus_req;
  82         int a_suspend_req;
  83         int b_bus_suspend_vld;
  84
  85         /* Output */
  86         int drv_vbus;
  87         int loc_conn;
  88         int loc_sof;
  89
  90         /* Others */
  91         int vbus_srp_up;
  92 };
  93
  94 /* must provide ULPI access function to read/write registers implemented in
  95  * ULPI address space */
  96 struct iotg_ulpi_access_ops {
  97         int     (*read)(struct intel_mid_otg_xceiv *iotg, u8 reg, u8 *val);
  98         int     (*write)(struct intel_mid_otg_xceiv *iotg, u8 reg, u8 val);
  99 };
 100
 101 #define OTG_A_DEVICE    0x0
 102 #define OTG_B_DEVICE    0x1
 103
 104 /*
 105  * the Intel MID (Langwell/Penwell) otg transceiver driver needs to interact
 106  * with device and host drivers to implement the USB OTG related feature. More
 107  * function members are added based on otg_transceiver data structure for this
 108  * purpose.
 109  */
 110 struct intel_mid_otg_xceiv {
 111         struct otg_transceiver  otg;
 112         struct otg_hsm          hsm;
 113
 114         /* base address */
 115         void __iomem            *base;
 116
 117         /* ops to access ulpi */
 118         struct iotg_ulpi_access_ops     ulpi_ops;
 119
 120         /* atomic notifier for interrupt context */
 121         struct atomic_notifier_head     iotg_notifier;
 122
 123         /* start/stop USB Host function */
 124         int     (*start_host)(struct intel_mid_otg_xceiv *iotg);
 125         int     (*stop_host)(struct intel_mid_otg_xceiv *iotg);
 126
 127         /* start/stop USB Peripheral function */
 128         int     (*start_peripheral)(struct intel_mid_otg_xceiv *iotg);
 129         int     (*stop_peripheral)(struct intel_mid_otg_xceiv *iotg);
 130
 131         /* start/stop ADP sense/probe function */
 132         int     (*set_adp_probe)(struct intel_mid_otg_xceiv *iotg,
 133                                         bool enabled, int dev);
 134         int     (*set_adp_sense)(struct intel_mid_otg_xceiv *iotg,
 135                                         bool enabled);
 136
 137 #ifdef CONFIG_PM
 138         /* suspend/resume USB host function */
 139         int     (*suspend_host)(struct intel_mid_otg_xceiv *iotg,
 140                                         pm_message_t message);
 141         int     (*resume_host)(struct intel_mid_otg_xceiv *iotg);
 142
 143         int     (*suspend_peripheral)(struct intel_mid_otg_xceiv *iotg,
 144                                         pm_message_t message);
 145         int     (*resume_peripheral)(struct intel_mid_otg_xceiv *iotg);
 146 #endif
 147
 148 };
 149 static inline
 150 struct intel_mid_otg_xceiv *otg_to_mid_xceiv(struct otg_transceiver *otg)
 151 {
 152         return container_of(otg, struct intel_mid_otg_xceiv, otg);
 153 }
 154
 155 #define MID_OTG_NOTIFY_CONNECT          0x0001
 156 #define MID_OTG_NOTIFY_DISCONN          0x0002
 157 #define MID_OTG_NOTIFY_HSUSPEND         0x0003
 158 #define MID_OTG_NOTIFY_HRESUME          0x0004
 159 #define MID_OTG_NOTIFY_CSUSPEND         0x0005
 160 #define MID_OTG_NOTIFY_CRESUME          0x0006
 161 #define MID_OTG_NOTIFY_HOSTADD          0x0007
 162 #define MID_OTG_NOTIFY_HOSTREMOVE       0x0008
 163 #define MID_OTG_NOTIFY_CLIENTADD        0x0009
 164 #define MID_OTG_NOTIFY_CLIENTREMOVE     0x000a
 165
 166 static inline int
 167 intel_mid_otg_register_notifier(struct intel_mid_otg_xceiv *iotg,
 168                                 struct notifier_block *nb)
 169 {
 170         return atomic_notifier_chain_register(&iotg->iotg_notifier, nb);
 171 }
 172
 173 static inline void
 174 intel_mid_otg_unregister_notifier(struct intel_mid_otg_xceiv *iotg,
 175                                 struct notifier_block *nb)
 176 {
 177         atomic_notifier_chain_unregister(&iotg->iotg_notifier, nb);
 178 }
 179
 180 #endif /* __INTEL_MID_OTG_H */