2 * drivers/usb/otg/nop-usb-xceiv.c
4 * NOP USB transceiver for all USB transceiver which are either built-in
5 * into USB IP or which are mostly autonomous.
7 * Copyright (C) 2009 Texas Instruments Inc
8 * Author: Ajay Kumar Gupta <ajay.gupta@ti.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 * This provides a "nop" transceiver for PHYs which are
26 * autonomous such as isp1504, isp1707, etc.
29 #include <linux/module.h>
30 #include <linux/platform_device.h>
31 #include <linux/dma-mapping.h>
32 #include <linux/usb/otg.h>
33 #include <linux/slab.h>
35 struct nop_usb_xceiv
{
40 static struct platform_device
*pd
;
42 void usb_nop_xceiv_register(void)
46 pd
= platform_device_register_simple("nop_usb_xceiv", -1, NULL
, 0);
48 printk(KERN_ERR
"Unable to register usb nop transceiver\n");
52 EXPORT_SYMBOL(usb_nop_xceiv_register
);
54 void usb_nop_xceiv_unregister(void)
56 platform_device_unregister(pd
);
59 EXPORT_SYMBOL(usb_nop_xceiv_unregister
);
61 static int nop_set_suspend(struct usb_phy
*x
, int suspend
)
66 static int nop_set_peripheral(struct usb_otg
*otg
, struct usb_gadget
*gadget
)
77 otg
->phy
->state
= OTG_STATE_B_IDLE
;
81 static int nop_set_host(struct usb_otg
*otg
, struct usb_bus
*host
)
95 static int __devinit
nop_usb_xceiv_probe(struct platform_device
*pdev
)
97 struct nop_usb_xceiv
*nop
;
100 nop
= kzalloc(sizeof *nop
, GFP_KERNEL
);
104 nop
->phy
.otg
= kzalloc(sizeof *nop
->phy
.otg
, GFP_KERNEL
);
110 nop
->dev
= &pdev
->dev
;
111 nop
->phy
.dev
= nop
->dev
;
112 nop
->phy
.label
= "nop-xceiv";
113 nop
->phy
.set_suspend
= nop_set_suspend
;
114 nop
->phy
.state
= OTG_STATE_UNDEFINED
;
116 nop
->phy
.otg
->phy
= &nop
->phy
;
117 nop
->phy
.otg
->set_host
= nop_set_host
;
118 nop
->phy
.otg
->set_peripheral
= nop_set_peripheral
;
120 err
= usb_set_transceiver(&nop
->phy
);
122 dev_err(&pdev
->dev
, "can't register transceiver, err: %d\n",
127 platform_set_drvdata(pdev
, nop
);
129 ATOMIC_INIT_NOTIFIER_HEAD(&nop
->phy
.notifier
);
138 static int __devexit
nop_usb_xceiv_remove(struct platform_device
*pdev
)
140 struct nop_usb_xceiv
*nop
= platform_get_drvdata(pdev
);
142 usb_set_transceiver(NULL
);
144 platform_set_drvdata(pdev
, NULL
);
151 static struct platform_driver nop_usb_xceiv_driver
= {
152 .probe
= nop_usb_xceiv_probe
,
153 .remove
= __devexit_p(nop_usb_xceiv_remove
),
155 .name
= "nop_usb_xceiv",
156 .owner
= THIS_MODULE
,
160 static int __init
nop_usb_xceiv_init(void)
162 return platform_driver_register(&nop_usb_xceiv_driver
);
164 subsys_initcall(nop_usb_xceiv_init
);
166 static void __exit
nop_usb_xceiv_exit(void)
168 platform_driver_unregister(&nop_usb_xceiv_driver
);
170 module_exit(nop_usb_xceiv_exit
);
172 MODULE_ALIAS("platform:nop_usb_xceiv");
173 MODULE_AUTHOR("Texas Instruments Inc");
174 MODULE_DESCRIPTION("NOP USB Transceiver driver");
175 MODULE_LICENSE("GPL");