2 * Intel MID (Langwell/Penwell) USB OTG Transceiver driver
3 * Copyright (C) 2008 - 2010, Intel Corporation.
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.
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
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.
20 #ifndef __INTEL_MID_OTG_H
21 #define __INTEL_MID_OTG_H
24 #include <linux/usb/otg.h>
25 #include <linux/notifier.h>
27 struct intel_mid_otg_xceiv;
29 /* This is a common data structure for Intel MID platform to
30 * save values of the OTG state machine */
57 /* Internal variables */
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;
69 int a_wait_vfall_tmout;
70 int b_ase0_brst_tmout;
71 int b_bus_suspend_tmout;
75 int b_adp_sense_tmout;
77 /* Informative variables */
83 int b_bus_suspend_vld;
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);
101 #define OTG_A_DEVICE 0x0
102 #define OTG_B_DEVICE 0x1
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 usb_phy data structure for this
110 struct intel_mid_otg_xceiv {
117 /* ops to access ulpi */
118 struct iotg_ulpi_access_ops ulpi_ops;
120 /* atomic notifier for interrupt context */
121 struct atomic_notifier_head iotg_notifier;
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);
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);
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,
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);
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);
150 struct intel_mid_otg_xceiv *otg_to_mid_xceiv(struct usb_phy *otg)
152 return container_of(otg, struct intel_mid_otg_xceiv, otg);
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
167 intel_mid_otg_register_notifier(struct intel_mid_otg_xceiv *iotg,
168 struct notifier_block *nb)
170 return atomic_notifier_chain_register(&iotg->iotg_notifier, nb);
174 intel_mid_otg_unregister_notifier(struct intel_mid_otg_xceiv *iotg,
175 struct notifier_block *nb)
177 atomic_notifier_chain_unregister(&iotg->iotg_notifier, nb);
180 #endif /* __INTEL_MID_OTG_H */