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Linux/drivers/media/usb/dvb-usb-v2/au6610.c

  1 /*
  2  * DVB USB Linux driver for Alcor Micro AU6610 DVB-T USB2.0.
  3  *
  4  * Copyright (C) 2006 Antti Palosaari <crope@iki.fi>
  5  *
  6  *    This program is free software; you can redistribute it and/or modify
  7  *    it under the terms of the GNU General Public License as published by
  8  *    the Free Software Foundation; either version 2 of the License, or
  9  *    (at your option) any later version.
 10  *
 11  *    This program is distributed in the hope that it will be useful,
 12  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 13  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14  *    GNU General Public License for more details.
 15  *
 16  *    You should have received a copy of the GNU General Public License
 17  *    along with this program; if not, write to the Free Software
 18  *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 19  */
 20 
 21 #include "au6610.h"
 22 #include "zl10353.h"
 23 #include "qt1010.h"
 24 
 25 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 26 
 27 static int au6610_usb_msg(struct dvb_usb_device *d, u8 operation, u8 addr,
 28                           u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
 29 {
 30         int ret;
 31         u16 index;
 32         u8 *usb_buf;
 33 
 34         /*
 35          * allocate enough for all known requests,
 36          * read returns 5 and write 6 bytes
 37          */
 38         usb_buf = kmalloc(6, GFP_KERNEL);
 39         if (!usb_buf)
 40                 return -ENOMEM;
 41 
 42         switch (wlen) {
 43         case 1:
 44                 index = wbuf[0] << 8;
 45                 break;
 46         case 2:
 47                 index = wbuf[0] << 8;
 48                 index += wbuf[1];
 49                 break;
 50         default:
 51                 dev_err(&d->udev->dev, "%s: wlen=%d, aborting\n",
 52                                 KBUILD_MODNAME, wlen);
 53                 ret = -EINVAL;
 54                 goto error;
 55         }
 56 
 57         ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), operation,
 58                               USB_TYPE_VENDOR|USB_DIR_IN, addr << 1, index,
 59                               usb_buf, 6, AU6610_USB_TIMEOUT);
 60 
 61         dvb_usb_dbg_usb_control_msg(d->udev, operation,
 62                         (USB_TYPE_VENDOR|USB_DIR_IN), addr << 1, index,
 63                         usb_buf, 6);
 64 
 65         if (ret < 0)
 66                 goto error;
 67 
 68         switch (operation) {
 69         case AU6610_REQ_I2C_READ:
 70         case AU6610_REQ_USB_READ:
 71                 /* requested value is always 5th byte in buffer */
 72                 rbuf[0] = usb_buf[4];
 73         }
 74 error:
 75         kfree(usb_buf);
 76         return ret;
 77 }
 78 
 79 static int au6610_i2c_msg(struct dvb_usb_device *d, u8 addr,
 80                           u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
 81 {
 82         u8 request;
 83         u8 wo = (rbuf == NULL || rlen == 0); /* write-only */
 84 
 85         if (wo) {
 86                 request = AU6610_REQ_I2C_WRITE;
 87         } else { /* rw */
 88                 request = AU6610_REQ_I2C_READ;
 89         }
 90 
 91         return au6610_usb_msg(d, request, addr, wbuf, wlen, rbuf, rlen);
 92 }
 93 
 94 
 95 /* I2C */
 96 static int au6610_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
 97                            int num)
 98 {
 99         struct dvb_usb_device *d = i2c_get_adapdata(adap);
100         int i;
101 
102         if (num > 2)
103                 return -EINVAL;
104 
105         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
106                 return -EAGAIN;
107 
108         for (i = 0; i < num; i++) {
109                 /* write/read request */
110                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
111                         if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
112                                            msg[i].len, msg[i+1].buf,
113                                            msg[i+1].len) < 0)
114                                 break;
115                         i++;
116                 } else if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
117                                                msg[i].len, NULL, 0) < 0)
118                                 break;
119         }
120 
121         mutex_unlock(&d->i2c_mutex);
122         return i;
123 }
124 
125 
126 static u32 au6610_i2c_func(struct i2c_adapter *adapter)
127 {
128         return I2C_FUNC_I2C;
129 }
130 
131 static struct i2c_algorithm au6610_i2c_algo = {
132         .master_xfer   = au6610_i2c_xfer,
133         .functionality = au6610_i2c_func,
134 };
135 
136 /* Callbacks for DVB USB */
137 static struct zl10353_config au6610_zl10353_config = {
138         .demod_address = 0x0f,
139         .no_tuner = 1,
140         .parallel_ts = 1,
141 };
142 
143 static int au6610_zl10353_frontend_attach(struct dvb_usb_adapter *adap)
144 {
145         adap->fe[0] = dvb_attach(zl10353_attach, &au6610_zl10353_config,
146                         &adap_to_d(adap)->i2c_adap);
147         if (adap->fe[0] == NULL)
148                 return -ENODEV;
149 
150         return 0;
151 }
152 
153 static struct qt1010_config au6610_qt1010_config = {
154         .i2c_address = 0x62
155 };
156 
157 static int au6610_qt1010_tuner_attach(struct dvb_usb_adapter *adap)
158 {
159         return dvb_attach(qt1010_attach, adap->fe[0],
160                         &adap_to_d(adap)->i2c_adap,
161                         &au6610_qt1010_config) == NULL ? -ENODEV : 0;
162 }
163 
164 static int au6610_init(struct dvb_usb_device *d)
165 {
166         /* TODO: this functionality belongs likely to the streaming control */
167         /* bInterfaceNumber 0, bAlternateSetting 5 */
168         return usb_set_interface(d->udev, 0, 5);
169 }
170 
171 static struct dvb_usb_device_properties au6610_props = {
172         .driver_name = KBUILD_MODNAME,
173         .owner = THIS_MODULE,
174         .adapter_nr = adapter_nr,
175 
176         .i2c_algo = &au6610_i2c_algo,
177         .frontend_attach = au6610_zl10353_frontend_attach,
178         .tuner_attach = au6610_qt1010_tuner_attach,
179         .init = au6610_init,
180 
181         .num_adapters = 1,
182         .adapter = {
183                 {
184                         .stream = DVB_USB_STREAM_ISOC(0x82, 5, 40, 942, 1),
185                 },
186         },
187 };
188 
189 static const struct usb_device_id au6610_id_table[] = {
190         { DVB_USB_DEVICE(USB_VID_ALCOR_MICRO, USB_PID_SIGMATEK_DVB_110,
191                 &au6610_props, "Sigmatek DVB-110", NULL) },
192         { }
193 };
194 MODULE_DEVICE_TABLE(usb, au6610_id_table);
195 
196 static struct usb_driver au6610_driver = {
197         .name = KBUILD_MODNAME,
198         .id_table = au6610_id_table,
199         .probe = dvb_usbv2_probe,
200         .disconnect = dvb_usbv2_disconnect,
201         .suspend = dvb_usbv2_suspend,
202         .resume = dvb_usbv2_resume,
203         .reset_resume = dvb_usbv2_reset_resume,
204         .no_dynamic_id = 1,
205         .soft_unbind = 1,
206 };
207 
208 module_usb_driver(au6610_driver);
209 
210 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
211 MODULE_DESCRIPTION("Driver for Alcor Micro AU6610 DVB-T USB2.0");
212 MODULE_VERSION("0.1");
213 MODULE_LICENSE("GPL");
214 

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