/* * dvb-dibusb-fe-i2c.c is part of the driver for mobile USB Budget DVB-T devices * based on reference design made by DiBcom (http://www.dibcom.fr/) * * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de) * * see dvb-dibusb-core.c for more copyright details. * * This file contains functions for attaching, initializing of an appropriate * demodulator/frontend. I2C-stuff is also located here. * */ #include "dvb-dibusb.h" #include static int dibusb_i2c_msg(struct usb_dibusb *dib, u8 addr, u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen) { u8 sndbuf[wlen+4]; /* lead(1) devaddr,direction(1) addr(2) data(wlen) (len(2) (when reading)) */ /* write only ? */ int wo = (rbuf == NULL || rlen == 0), len = 2 + wlen + (wo ? 0 : 2); sndbuf[0] = wo ? DIBUSB_REQ_I2C_WRITE : DIBUSB_REQ_I2C_READ; sndbuf[1] = (addr & 0xfe) | (wo ? 0 : 1); memcpy(&sndbuf[2],wbuf,wlen); if (!wo) { sndbuf[wlen+2] = (rlen >> 8) & 0xff; sndbuf[wlen+3] = rlen & 0xff; } return dibusb_readwrite_usb(dib,sndbuf,len,rbuf,rlen); } /* * I2C master xfer function */ static int dibusb_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg msg[],int num) { struct usb_dibusb *dib = i2c_get_adapdata(adap); int i; if (down_interruptible(&dib->i2c_sem) < 0) return -EAGAIN; if (num > 2) warn("more than 2 i2c messages at a time is not handled yet. TODO."); for (i = 0; i < num; i++) { /* write/read request */ if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) { if (dibusb_i2c_msg(dib, msg[i].addr, msg[i].buf,msg[i].len, msg[i+1].buf,msg[i+1].len) < 0) break; i++; } else if (dibusb_i2c_msg(dib, msg[i].addr, msg[i].buf,msg[i].len,NULL,0) < 0) break; } up(&dib->i2c_sem); return i; } static u32 dibusb_i2c_func(struct i2c_adapter *adapter) { return I2C_FUNC_I2C; } static struct i2c_algorithm dibusb_algo = { .name = "DiBcom USB i2c algorithm", .id = I2C_ALGO_BIT, .master_xfer = dibusb_i2c_xfer, .functionality = dibusb_i2c_func, }; int dibusb_fe_init(struct usb_dibusb* dib) { struct dib3000_config demod_cfg; int i; if (dib->init_state & DIBUSB_STATE_I2C) for (i = 0; i < sizeof(dib->dibdev->parm->demod_i2c_addrs) / sizeof(unsigned char) && dib->dibdev->parm->demod_i2c_addrs[i] != 0; i++) { demod_cfg.demod_address = dib->dibdev->parm->demod_i2c_addrs[i]; demod_cfg.pll_addr = dib->dibdev->parm->pll_addr; demod_cfg.pll_set = dib->dibdev->parm->pll_set; demod_cfg.pll_init = NULL; switch (dib->dibdev->parm->type) { case DIBUSB1_1: case DIBUSB1_1_AN2235: dib->fe = dib3000mb_attach(&demod_cfg,&dib->i2c_adap,&dib->xfer_ops); break; case DIBUSB2_0: dib->fe = dib3000mc_attach(&demod_cfg,&dib->i2c_adap,&dib->xfer_ops); break; } if (dib->fe != NULL) { info("found demodulator at i2c address 0x%x",demod_cfg.demod_address); break; } } if (dib->fe == NULL) { err("A frontend driver was not found for device '%s'.", dib->dibdev->name); return -ENODEV; } else { if (dvb_register_frontend(dib->adapter, dib->fe)) { err("Frontend registration failed."); if (dib->fe->ops->release) dib->fe->ops->release(dib->fe); dib->fe = NULL; return -ENODEV; } } return 0; } int dibusb_fe_exit(struct usb_dibusb *dib) { if (dib->fe != NULL) dvb_unregister_frontend(dib->fe); return 0; } int dibusb_i2c_init(struct usb_dibusb *dib) { int ret = 0; dib->adapter->priv = dib; strncpy(dib->i2c_adap.name,dib->dibdev->name,I2C_NAME_SIZE); #ifdef I2C_ADAP_CLASS_TV_DIGITAL dib->i2c_adap.class = I2C_ADAP_CLASS_TV_DIGITAL, #else dib->i2c_adap.class = I2C_CLASS_TV_DIGITAL, #endif dib->i2c_adap.algo = &dibusb_algo; dib->i2c_adap.algo_data = NULL; dib->i2c_adap.id = I2C_ALGO_BIT; i2c_set_adapdata(&dib->i2c_adap, dib); if ((ret = i2c_add_adapter(&dib->i2c_adap)) < 0) err("could not add i2c adapter"); dib->init_state |= DIBUSB_STATE_I2C; return ret; } int dibusb_i2c_exit(struct usb_dibusb *dib) { if (dib->init_state & DIBUSB_STATE_I2C) i2c_del_adapter(&dib->i2c_adap); dib->init_state &= ~DIBUSB_STATE_I2C; return 0; } /* pll stuff, maybe removed soon (thx to Gerd/Andrew in advance) */ int thomson_cable_eu_pll_set(struct dvb_frontend* fe, struct dvb_frontend_parameters* params) { struct usb_dibusb* dib = (struct usb_dibusb*) fe->dvb->priv; u8 buf[4]; struct i2c_msg msg = { .addr = dib->dibdev->parm->pll_addr, .flags = 0, .buf = buf, .len = sizeof(buf) }; u32 tfreq = (params->frequency + 36125000) / 62500; int vu,p0,p1,p2; if (params->frequency > 403250000) vu = 1, p2 = 1, p1 = 0, p0 = 1; else if (params->frequency > 115750000) vu = 0, p2 = 1, p1 = 1, p0 = 0; else if (params->frequency > 44250000) vu = 0, p2 = 0, p1 = 1, p0 = 1; else return -EINVAL; buf[0] = (tfreq >> 8) & 0x7f; buf[1] = tfreq & 0xff; buf[2] = 0x8e; buf[3] = (vu << 7) | (p2 << 2) | (p1 << 1) | p0; if (i2c_transfer (&dib->i2c_adap, &msg, 1) != 1) return -EIO; msleep(1); return 0; } int panasonic_cofdm_env57h1xd5_pll_set(struct dvb_frontend *fe, struct dvb_frontend_parameters *params) { struct usb_dibusb* dib = (struct usb_dibusb*) fe->dvb->priv; u8 buf[4]; u32 freq = params->frequency; u32 tfreq = (freq + 36125000) / 1000000 * 6 + 1; u8 TA, T210, R210, ctrl1, cp210, p4321; struct i2c_msg msg = { .addr = dib->dibdev->parm->pll_addr, .flags = 0, .buf = buf, .len = sizeof(buf) }; if (freq > 858000000) { err("frequency cannot be larger than 858 MHz."); return -EINVAL; } // contol data 1 : 1 | T/A=1 | T2,T1,T0 = 0,0,0 | R2,R1,R0 = 0,1,0 TA = 1; T210 = 0; R210 = 0x2; ctrl1 = (1 << 7) | (TA << 6) | (T210 << 3) | R210; // ******** CHARGE PUMP CONFIG vs RF FREQUENCIES ***************** if (freq < 470000000) cp210 = 2; // VHF Low and High band ch E12 to E4 to E12 else if (freq < 526000000) cp210 = 4; // UHF band Ch E21 to E27 else // if (freq < 862000000) cp210 = 5; // UHF band ch E28 to E69 //********************* BW select ******************************* if (freq < 153000000) p4321 = 1; // BW selected for VHF low else if (freq < 470000000) p4321 = 2; // BW selected for VHF high E5 to E12 else // if (freq < 862000000) p4321 = 4; // BW selection for UHF E21 to E69 buf[0] = (tfreq >> 8) & 0xff; buf[1] = (tfreq >> 0) & 0xff; buf[2] = 0xff & ctrl1; buf[3] = (cp210 << 5) | (p4321); if (i2c_transfer (&dib->i2c_adap, &msg, 1) != 1) return -EIO; msleep(1); return 0; }