drivers/media/dvb/dvb-usb/gl861.c

   1 /* DVB USB compliant linux driver for GL861 USB2.0 devices.
   2  *
   3  *      This program is free software; you can redistribute it and/or modify it
   4  *      under the terms of the GNU General Public License as published by the Free
   5  *      Software Foundation, version 2.
   6  *
   7  * see Documentation/dvb/README.dvb-usb for more information
   8  */
   9 #include "gl861.h"
  10
  11 #include "zl10353.h"
  12 #include "qt1010.h"
  13
  14 /* debug */
  15 int dvb_usb_gl861_debug;
  16 module_param_named(debug,dvb_usb_gl861_debug, int, 0644);
  17 MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);
  18
  19 static int gl861_i2c_msg(struct dvb_usb_device *d, u8 addr,
  20                          u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
  21 {
  22         u16 index;
  23         u16 value = addr << 8;
  24         int wo = (rbuf == NULL || rlen == 0); /* write-only */
  25         u8 req, type;
  26
  27         if (wo) {
  28                 req = GL861_REQ_I2C_WRITE;
  29                 type = GL861_WRITE;
  30         } else { /* rw */
  31                 req = GL861_REQ_I2C_READ;
  32                 type = GL861_READ;
  33         }
  34
  35         switch (wlen) {
  36         case 1:
  37                 index = wbuf[0];
  38                 break;
  39         case 2:
  40                 index = wbuf[0];
  41                 value = value + wbuf[1];
  42                 break;
  43         default:
  44                 warn("wlen = %x, aborting.", wlen);
  45                 return -EINVAL;
  46         }
  47
  48         return usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), req, type,
  49                                value, index, rbuf, rlen, 2000);
  50 }
  51
  52 /* I2C */
  53 static int gl861_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
  54                           int num)
  55 {
  56         struct dvb_usb_device *d = i2c_get_adapdata(adap);
  57         int i;
  58
  59         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
  60                 return -EAGAIN;
  61
  62         if (num > 2)
  63                 return -EINVAL;
  64
  65         for (i = 0; i < num; i++) {
  66                 /* write/read request */
  67                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
  68                         if (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
  69                                           msg[i].len, msg[i+1].buf, msg[i+1].len) < 0)
  70                                 break;
  71                         i++;
  72                 } else
  73                         if (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
  74                                           msg[i].len, NULL, 0) < 0)
  75                                 break;
  76         }
  77
  78         mutex_unlock(&d->i2c_mutex);
  79         return i;
  80 }
  81
  82 static u32 gl861_i2c_func(struct i2c_adapter *adapter)
  83 {
  84         return I2C_FUNC_I2C;
  85 }
  86
  87 static struct i2c_algorithm gl861_i2c_algo = {
  88         .master_xfer   = gl861_i2c_xfer,
  89         .functionality = gl861_i2c_func,
  90 };
  91
  92 /* Callbacks for DVB USB */
  93 static int gl861_identify_state(struct usb_device *udev,
  94                                 struct dvb_usb_device_properties *props,
  95                                 struct dvb_usb_device_description **desc,
  96                                 int *cold)
  97 {
  98         *cold = 0;
  99
 100         return 0;
 101 }
 102
 103 static struct zl10353_config gl861_zl10353_config = {
 104         .demod_address = 0x1e,
 105         .no_tuner = 1,
 106         .parallel_ts = 1,
 107 };
 108
 109 static int gl861_frontend_attach(struct dvb_usb_adapter *adap)
 110 {
 111         if ((adap->fe = dvb_attach(zl10353_attach, &gl861_zl10353_config,
 112                                    &adap->dev->i2c_adap)) != NULL) {
 113                 return 0;
 114         }
 115
 116         return -EIO;
 117 }
 118
 119 static struct qt1010_config gl861_qt1010_config = {
 120         .i2c_address = 0xc4
 121 };
 122
 123 static int gl861_tuner_attach(struct dvb_usb_adapter *adap)
 124 {
 125         /* TODO FIXME; probably I2C gate.
 126         QT1010 tuner does not respond before we write 0x1a to ZL10353 demodulator
 127         register 0x62. This ought to be done somewhere in demodulator initialization.
 128         This solution is temporary hack. */
 129         u8 buf[2] = { 0x62, 0x1a };
 130         struct i2c_msg msg = {
 131                 .addr = gl861_zl10353_config.demod_address, .flags = 0, .buf = buf, .len = 2
 132         };
 133         if (i2c_transfer(&adap->dev->i2c_adap, &msg, 1) != 1) {
 134                 printk(KERN_WARNING "gl861 tuner attach failed\n");
 135                 return -EREMOTEIO;
 136         }
 137         return dvb_attach(qt1010_attach,
 138                           adap->fe, &adap->dev->i2c_adap,
 139                           &gl861_qt1010_config) == NULL ? -ENODEV : 0;
 140 }
 141
 142 /* DVB USB Driver stuff */
 143 static struct dvb_usb_device_properties gl861_properties;
 144
 145 static int gl861_probe(struct usb_interface *intf,
 146                        const struct usb_device_id *id)
 147 {
 148         struct dvb_usb_device *d;
 149         struct usb_host_interface *alt;
 150         int ret;
 151
 152         if (intf->num_altsetting < 2)
 153                 return -ENODEV;
 154
 155         if ((ret = dvb_usb_device_init(intf, &gl861_properties, THIS_MODULE, &d)) == 0) {
 156                 alt = usb_altnum_to_altsetting(intf, 0);
 157
 158                 if (alt == NULL) {
 159                         deb_rc("not alt found!\n");
 160                         return -ENODEV;
 161                 }
 162
 163                 ret = usb_set_interface(d->udev, alt->desc.bInterfaceNumber,
 164                                         alt->desc.bAlternateSetting);
 165         }
 166
 167         return ret;
 168 }
 169
 170 static struct usb_device_id gl861_table [] = {
 171                 { USB_DEVICE(USB_VID_MSI, USB_PID_MSI_MEGASKY580_55801) },
 172                 { }             /* Terminating entry */
 173 };
 174 MODULE_DEVICE_TABLE (usb, gl861_table);
 175
 176 static struct dvb_usb_device_properties gl861_properties = {
 177         .caps = DVB_USB_IS_AN_I2C_ADAPTER,
 178         .usb_ctrl = DEVICE_SPECIFIC,
 179
 180         .size_of_priv     = 0,
 181
 182         .identify_state   = gl861_identify_state,
 183         .num_adapters = 1,
 184         .adapter = {{
 185
 186                 .frontend_attach  = gl861_frontend_attach,
 187                 .tuner_attach     = gl861_tuner_attach,
 188
 189                 .stream = {
 190                         .type = USB_BULK,
 191                         .count = 7,
 192                         .endpoint = 0x81,
 193                         .u = {
 194                                 .bulk = {
 195                                         .buffersize = 512,
 196                                 }
 197                         }
 198                 },
 199         }},
 200         .i2c_algo         = &gl861_i2c_algo,
 201
 202         .num_device_descs = 1,
 203         .devices = {
 204                 {   "MSI Mega Sky 55801 DVB-T USB2.0",
 205                         { &gl861_table[0], NULL },
 206                         { NULL },
 207                 },
 208         }
 209 };
 210
 211 static struct usb_driver gl861_driver = {
 212         .name           = "dvb_usb_gl861",
 213         .probe          = gl861_probe,
 214         .disconnect     = dvb_usb_device_exit,
 215         .id_table       = gl861_table,
 216 };
 217
 218 /* module stuff */
 219 static int __init gl861_module_init(void)
 220 {
 221         int ret;
 222
 223         if ((ret = usb_register(&gl861_driver))) {
 224                 err("usb_register failed. Error number %d", ret);
 225                 return ret;
 226         }
 227
 228         return 0;
 229 }
 230
 231 static void __exit gl861_module_exit(void)
 232 {
 233         /* deregister this driver from the USB subsystem */
 234         usb_deregister(&gl861_driver);
 235 }
 236
 237 module_init (gl861_module_init);
 238 module_exit (gl861_module_exit);
 239
 240 MODULE_AUTHOR("Carl Lundqvist <comabug@gmail.com>");
 241 MODULE_DESCRIPTION("Driver MSI Mega Sky 580 DVB-T USB2.0 / GL861");
 242 MODULE_VERSION("0.1");
 243 MODULE_LICENSE("GPL");