usb/dvb-usb/dibusb-common.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /* Common methods for dibusb-based-receivers.
0003  *
0004  * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@posteo.de)
0005  *
0006  * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
0007  */
0008
0009 #include "dibusb.h"
0010
0011 /* Max transfer size done by I2C transfer functions */
0012 #define MAX_XFER_SIZE  64
0013
0014 static int debug;
0015 module_param(debug, int, 0644);
0016 MODULE_PARM_DESC(debug, "set debugging level (1=info (|-able))." DVB_USB_DEBUG_STATUS);
0017 MODULE_LICENSE("GPL");
0018
0019 #define deb_info(args...) dprintk(debug,0x01,args)
0020
0021 /* common stuff used by the different dibusb modules */
0022 int dibusb_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
0023 {
0024     if (adap->priv != NULL) {
0025         struct dibusb_state *st = adap->priv;
0026         if (st->ops.fifo_ctrl != NULL)
0027             if (st->ops.fifo_ctrl(adap->fe_adap[0].fe, onoff)) {
0028                 err("error while controlling the fifo of the demod.");
0029                 return -ENODEV;
0030             }
0031     }
0032     return 0;
0033 }
0034 EXPORT_SYMBOL(dibusb_streaming_ctrl);
0035
0036 int dibusb_pid_filter(struct dvb_usb_adapter *adap, int index, u16 pid, int onoff)
0037 {
0038     if (adap->priv != NULL) {
0039         struct dibusb_state *st = adap->priv;
0040         if (st->ops.pid_ctrl != NULL)
0041             st->ops.pid_ctrl(adap->fe_adap[0].fe,
0042                      index, pid, onoff);
0043     }
0044     return 0;
0045 }
0046 EXPORT_SYMBOL(dibusb_pid_filter);
0047
0048 int dibusb_pid_filter_ctrl(struct dvb_usb_adapter *adap, int onoff)
0049 {
0050     if (adap->priv != NULL) {
0051         struct dibusb_state *st = adap->priv;
0052         if (st->ops.pid_parse != NULL)
0053             if (st->ops.pid_parse(adap->fe_adap[0].fe, onoff) < 0)
0054                 err("could not handle pid_parser");
0055     }
0056     return 0;
0057 }
0058 EXPORT_SYMBOL(dibusb_pid_filter_ctrl);
0059
0060 int dibusb_power_ctrl(struct dvb_usb_device *d, int onoff)
0061 {
0062     u8 *b;
0063     int ret;
0064
0065     b = kmalloc(3, GFP_KERNEL);
0066     if (!b)
0067         return -ENOMEM;
0068
0069     b[0] = DIBUSB_REQ_SET_IOCTL;
0070     b[1] = DIBUSB_IOCTL_CMD_POWER_MODE;
0071     b[2] = onoff ? DIBUSB_IOCTL_POWER_WAKEUP : DIBUSB_IOCTL_POWER_SLEEP;
0072
0073     ret = dvb_usb_generic_write(d, b, 3);
0074
0075     kfree(b);
0076
0077     msleep(10);
0078
0079     return ret;
0080 }
0081 EXPORT_SYMBOL(dibusb_power_ctrl);
0082
0083 int dibusb2_0_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
0084 {
0085     int ret;
0086     u8 *b;
0087
0088     b = kmalloc(3, GFP_KERNEL);
0089     if (!b)
0090         return -ENOMEM;
0091
0092     if ((ret = dibusb_streaming_ctrl(adap,onoff)) < 0)
0093         goto ret;
0094
0095     if (onoff) {
0096         b[0] = DIBUSB_REQ_SET_STREAMING_MODE;
0097         b[1] = 0x00;
0098         ret = dvb_usb_generic_write(adap->dev, b, 2);
0099         if (ret  < 0)
0100             goto ret;
0101     }
0102
0103     b[0] = DIBUSB_REQ_SET_IOCTL;
0104     b[1] = onoff ? DIBUSB_IOCTL_CMD_ENABLE_STREAM : DIBUSB_IOCTL_CMD_DISABLE_STREAM;
0105     ret = dvb_usb_generic_write(adap->dev, b, 3);
0106
0107 ret:
0108     kfree(b);
0109     return ret;
0110 }
0111 EXPORT_SYMBOL(dibusb2_0_streaming_ctrl);
0112
0113 int dibusb2_0_power_ctrl(struct dvb_usb_device *d, int onoff)
0114 {
0115     u8 *b;
0116     int ret;
0117
0118     if (!onoff)
0119         return 0;
0120
0121     b = kmalloc(3, GFP_KERNEL);
0122     if (!b)
0123         return -ENOMEM;
0124
0125     b[0] = DIBUSB_REQ_SET_IOCTL;
0126     b[1] = DIBUSB_IOCTL_CMD_POWER_MODE;
0127     b[2] = DIBUSB_IOCTL_POWER_WAKEUP;
0128
0129     ret = dvb_usb_generic_write(d, b, 3);
0130
0131     kfree(b);
0132
0133     return ret;
0134 }
0135 EXPORT_SYMBOL(dibusb2_0_power_ctrl);
0136
0137 static int dibusb_i2c_msg(struct dvb_usb_device *d, u8 addr,
0138               u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
0139 {
0140     u8 *sndbuf;
0141     int ret, wo, len;
0142
0143     /* write only ? */
0144     wo = (rbuf == NULL || rlen == 0);
0145
0146     len = 2 + wlen + (wo ? 0 : 2);
0147
0148     sndbuf = kmalloc(MAX_XFER_SIZE, GFP_KERNEL);
0149     if (!sndbuf)
0150         return -ENOMEM;
0151
0152     if (4 + wlen > MAX_XFER_SIZE) {
0153         warn("i2c wr: len=%d is too big!\n", wlen);
0154         ret = -EOPNOTSUPP;
0155         goto ret;
0156     }
0157
0158     sndbuf[0] = wo ? DIBUSB_REQ_I2C_WRITE : DIBUSB_REQ_I2C_READ;
0159     sndbuf[1] = (addr << 1) | (wo ? 0 : 1);
0160
0161     memcpy(&sndbuf[2], wbuf, wlen);
0162
0163     if (!wo) {
0164         sndbuf[wlen + 2] = (rlen >> 8) & 0xff;
0165         sndbuf[wlen + 3] = rlen & 0xff;
0166     }
0167
0168     ret = dvb_usb_generic_rw(d, sndbuf, len, rbuf, rlen, 0);
0169
0170 ret:
0171     kfree(sndbuf);
0172     return ret;
0173 }
0174
0175 /*
0176  * I2C master xfer function
0177  */
0178 static int dibusb_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg msg[],int num)
0179 {
0180     struct dvb_usb_device *d = i2c_get_adapdata(adap);
0181     int i;
0182
0183     if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
0184         return -EAGAIN;
0185
0186     for (i = 0; i < num; i++) {
0187         /* write/read request */
0188         if (i+1 < num && (msg[i].flags & I2C_M_RD) == 0
0189                       && (msg[i+1].flags & I2C_M_RD)) {
0190             if (dibusb_i2c_msg(d, msg[i].addr, msg[i].buf,msg[i].len,
0191                         msg[i+1].buf,msg[i+1].len) < 0)
0192                 break;
0193             i++;
0194         } else if ((msg[i].flags & I2C_M_RD) == 0) {
0195             if (dibusb_i2c_msg(d, msg[i].addr, msg[i].buf,msg[i].len,NULL,0) < 0)
0196                 break;
0197         } else if (msg[i].addr != 0x50) {
0198             /* 0x50 is the address of the eeprom - we need to protect it
0199              * from dibusb's bad i2c implementation: reads without
0200              * writing the offset before are forbidden */
0201             if (dibusb_i2c_msg(d, msg[i].addr, NULL, 0, msg[i].buf, msg[i].len) < 0)
0202                 break;
0203         }
0204     }
0205
0206     mutex_unlock(&d->i2c_mutex);
0207     return i;
0208 }
0209
0210 static u32 dibusb_i2c_func(struct i2c_adapter *adapter)
0211 {
0212     return I2C_FUNC_I2C;
0213 }
0214
0215 struct i2c_algorithm dibusb_i2c_algo = {
0216     .master_xfer   = dibusb_i2c_xfer,
0217     .functionality = dibusb_i2c_func,
0218 };
0219 EXPORT_SYMBOL(dibusb_i2c_algo);
0220
0221 int dibusb_read_eeprom_byte(struct dvb_usb_device *d, u8 offs, u8 *val)
0222 {
0223     u8 *buf;
0224     int rc;
0225
0226     buf = kzalloc(2, GFP_KERNEL);
0227     if (!buf)
0228         return -ENOMEM;
0229
0230     buf[0] = offs;
0231
0232     rc = dibusb_i2c_msg(d, 0x50, &buf[0], 1, &buf[1], 1);
0233     *val = buf[1];
0234     kfree(buf);
0235
0236     return rc;
0237 }
0238 EXPORT_SYMBOL(dibusb_read_eeprom_byte);
0239
0240 /*
0241  * common remote control stuff
0242  */
0243 struct rc_map_table rc_map_dibusb_table[] = {
0244     /* Key codes for the little Artec T1/Twinhan/HAMA/ remote. */
0245     { 0x0016, KEY_POWER },
0246     { 0x0010, KEY_MUTE },
0247     { 0x0003, KEY_1 },
0248     { 0x0001, KEY_2 },
0249     { 0x0006, KEY_3 },
0250     { 0x0009, KEY_4 },
0251     { 0x001d, KEY_5 },
0252     { 0x001f, KEY_6 },
0253     { 0x000d, KEY_7 },
0254     { 0x0019, KEY_8 },
0255     { 0x001b, KEY_9 },
0256     { 0x0015, KEY_0 },
0257     { 0x0005, KEY_CHANNELUP },
0258     { 0x0002, KEY_CHANNELDOWN },
0259     { 0x001e, KEY_VOLUMEUP },
0260     { 0x000a, KEY_VOLUMEDOWN },
0261     { 0x0011, KEY_RECORD },
0262     { 0x0017, KEY_FAVORITES }, /* Heart symbol - Channel list. */
0263     { 0x0014, KEY_PLAY },
0264     { 0x001a, KEY_STOP },
0265     { 0x0040, KEY_REWIND },
0266     { 0x0012, KEY_FASTFORWARD },
0267     { 0x000e, KEY_PREVIOUS }, /* Recall - Previous channel. */
0268     { 0x004c, KEY_PAUSE },
0269     { 0x004d, KEY_SCREEN }, /* Full screen mode. */
0270     { 0x0054, KEY_AUDIO }, /* MTS - Switch to secondary audio. */
0271     /* additional keys TwinHan VisionPlus, the Artec seemingly not have */
0272     { 0x000c, KEY_CANCEL }, /* Cancel */
0273     { 0x001c, KEY_EPG }, /* EPG */
0274     { 0x0000, KEY_TAB }, /* Tab */
0275     { 0x0048, KEY_INFO }, /* Preview */
0276     { 0x0004, KEY_LIST }, /* RecordList */
0277     { 0x000f, KEY_TEXT }, /* Teletext */
0278     /* Key codes for the KWorld/ADSTech/JetWay remote. */
0279     { 0x8612, KEY_POWER },
0280     { 0x860f, KEY_SELECT }, /* source */
0281     { 0x860c, KEY_UNKNOWN }, /* scan */
0282     { 0x860b, KEY_EPG },
0283     { 0x8610, KEY_MUTE },
0284     { 0x8601, KEY_1 },
0285     { 0x8602, KEY_2 },
0286     { 0x8603, KEY_3 },
0287     { 0x8604, KEY_4 },
0288     { 0x8605, KEY_5 },
0289     { 0x8606, KEY_6 },
0290     { 0x8607, KEY_7 },
0291     { 0x8608, KEY_8 },
0292     { 0x8609, KEY_9 },
0293     { 0x860a, KEY_0 },
0294     { 0x8618, KEY_ZOOM },
0295     { 0x861c, KEY_UNKNOWN }, /* preview */
0296     { 0x8613, KEY_UNKNOWN }, /* snap */
0297     { 0x8600, KEY_UNDO },
0298     { 0x861d, KEY_RECORD },
0299     { 0x860d, KEY_STOP },
0300     { 0x860e, KEY_PAUSE },
0301     { 0x8616, KEY_PLAY },
0302     { 0x8611, KEY_BACK },
0303     { 0x8619, KEY_FORWARD },
0304     { 0x8614, KEY_UNKNOWN }, /* pip */
0305     { 0x8615, KEY_ESC },
0306     { 0x861a, KEY_UP },
0307     { 0x861e, KEY_DOWN },
0308     { 0x861f, KEY_LEFT },
0309     { 0x861b, KEY_RIGHT },
0310
0311     /* Key codes for the DiBcom MOD3000 remote. */
0312     { 0x8000, KEY_MUTE },
0313     { 0x8001, KEY_TEXT },
0314     { 0x8002, KEY_HOME },
0315     { 0x8003, KEY_POWER },
0316
0317     { 0x8004, KEY_RED },
0318     { 0x8005, KEY_GREEN },
0319     { 0x8006, KEY_YELLOW },
0320     { 0x8007, KEY_BLUE },
0321
0322     { 0x8008, KEY_DVD },
0323     { 0x8009, KEY_AUDIO },
0324     { 0x800a, KEY_IMAGES },      /* Pictures */
0325     { 0x800b, KEY_VIDEO },
0326
0327     { 0x800c, KEY_BACK },
0328     { 0x800d, KEY_UP },
0329     { 0x800e, KEY_RADIO },
0330     { 0x800f, KEY_EPG },
0331
0332     { 0x8010, KEY_LEFT },
0333     { 0x8011, KEY_OK },
0334     { 0x8012, KEY_RIGHT },
0335     { 0x8013, KEY_UNKNOWN },    /* SAP */
0336
0337     { 0x8014, KEY_TV },
0338     { 0x8015, KEY_DOWN },
0339     { 0x8016, KEY_MENU },       /* DVD Menu */
0340     { 0x8017, KEY_LAST },
0341
0342     { 0x8018, KEY_RECORD },
0343     { 0x8019, KEY_STOP },
0344     { 0x801a, KEY_PAUSE },
0345     { 0x801b, KEY_PLAY },
0346
0347     { 0x801c, KEY_PREVIOUS },
0348     { 0x801d, KEY_REWIND },
0349     { 0x801e, KEY_FASTFORWARD },
0350     { 0x801f, KEY_NEXT},
0351
0352     { 0x8040, KEY_1 },
0353     { 0x8041, KEY_2 },
0354     { 0x8042, KEY_3 },
0355     { 0x8043, KEY_CHANNELUP },
0356
0357     { 0x8044, KEY_4 },
0358     { 0x8045, KEY_5 },
0359     { 0x8046, KEY_6 },
0360     { 0x8047, KEY_CHANNELDOWN },
0361
0362     { 0x8048, KEY_7 },
0363     { 0x8049, KEY_8 },
0364     { 0x804a, KEY_9 },
0365     { 0x804b, KEY_VOLUMEUP },
0366
0367     { 0x804c, KEY_CLEAR },
0368     { 0x804d, KEY_0 },
0369     { 0x804e, KEY_ENTER },
0370     { 0x804f, KEY_VOLUMEDOWN },
0371 };
0372 EXPORT_SYMBOL(rc_map_dibusb_table);
0373
0374 int dibusb_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
0375 {
0376     u8 *buf;
0377     int ret;
0378
0379     buf = kmalloc(5, GFP_KERNEL);
0380     if (!buf)
0381         return -ENOMEM;
0382
0383     buf[0] = DIBUSB_REQ_POLL_REMOTE;
0384
0385     ret = dvb_usb_generic_rw(d, buf, 1, buf, 5, 0);
0386     if (ret < 0)
0387         goto ret;
0388
0389     dvb_usb_nec_rc_key_to_event(d, buf, event, state);
0390
0391     if (buf[0] != 0)
0392         deb_info("key: %*ph\n", 5, buf);
0393
0394 ret:
0395     kfree(buf);
0396
0397     return ret;
0398 }
0399 EXPORT_SYMBOL(dibusb_rc_query);