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/usb/nop-usb-xceiv.h>
34 #include <linux/slab.h>
36 struct nop_usb_xceiv
{
41 static struct platform_device
*pd
;
43 void usb_nop_xceiv_register(void)
47 pd
= platform_device_register_simple("nop_usb_xceiv", -1, NULL
, 0);
49 printk(KERN_ERR
"Unable to register usb nop transceiver\n");
53 EXPORT_SYMBOL(usb_nop_xceiv_register
);
55 void usb_nop_xceiv_unregister(void)
57 platform_device_unregister(pd
);
60 EXPORT_SYMBOL(usb_nop_xceiv_unregister
);
62 static int nop_set_suspend(struct usb_phy
*x
, int suspend
)
67 static int nop_set_peripheral(struct usb_otg
*otg
, struct usb_gadget
*gadget
)
78 otg
->phy
->state
= OTG_STATE_B_IDLE
;
82 static int nop_set_host(struct usb_otg
*otg
, struct usb_bus
*host
)
96 static int nop_usb_xceiv_probe(struct platform_device
*pdev
)
98 struct nop_usb_xceiv_platform_data
*pdata
= pdev
->dev
.platform_data
;
99 struct nop_usb_xceiv
*nop
;
100 enum usb_phy_type type
= USB_PHY_TYPE_USB2
;
103 nop
= kzalloc(sizeof *nop
, GFP_KERNEL
);
107 nop
->phy
.otg
= kzalloc(sizeof *nop
->phy
.otg
, GFP_KERNEL
);
116 nop
->dev
= &pdev
->dev
;
117 nop
->phy
.dev
= nop
->dev
;
118 nop
->phy
.label
= "nop-xceiv";
119 nop
->phy
.set_suspend
= nop_set_suspend
;
120 nop
->phy
.state
= OTG_STATE_UNDEFINED
;
122 nop
->phy
.otg
->phy
= &nop
->phy
;
123 nop
->phy
.otg
->set_host
= nop_set_host
;
124 nop
->phy
.otg
->set_peripheral
= nop_set_peripheral
;
126 err
= usb_add_phy(&nop
->phy
, type
);
128 dev_err(&pdev
->dev
, "can't register transceiver, err: %d\n",
133 platform_set_drvdata(pdev
, nop
);
135 ATOMIC_INIT_NOTIFIER_HEAD(&nop
->phy
.notifier
);
144 static int nop_usb_xceiv_remove(struct platform_device
*pdev
)
146 struct nop_usb_xceiv
*nop
= platform_get_drvdata(pdev
);
148 usb_remove_phy(&nop
->phy
);
150 platform_set_drvdata(pdev
, NULL
);
157 static struct platform_driver nop_usb_xceiv_driver
= {
158 .probe
= nop_usb_xceiv_probe
,
159 .remove
= nop_usb_xceiv_remove
,
161 .name
= "nop_usb_xceiv",
162 .owner
= THIS_MODULE
,
166 static int __init
nop_usb_xceiv_init(void)
168 return platform_driver_register(&nop_usb_xceiv_driver
);
170 subsys_initcall(nop_usb_xceiv_init
);
172 static void __exit
nop_usb_xceiv_exit(void)
174 platform_driver_unregister(&nop_usb_xceiv_driver
);
176 module_exit(nop_usb_xceiv_exit
);
178 MODULE_ALIAS("platform:nop_usb_xceiv");
179 MODULE_AUTHOR("Texas Instruments Inc");
180 MODULE_DESCRIPTION("NOP USB Transceiver driver");
181 MODULE_LICENSE("GPL");