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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * DVB USB Linux driver for AME DTV-5100 USB2.0 DVB-T4 *5 * Copyright (C) 2008  Antoine Jacquet <royale@zerezo.com>6 * http://royale.zerezo.com/dtv5100/7 *8 * Inspired by gl861.c and au6610.c drivers9 */10 11#include "dtv5100.h"12#include "zl10353.h"13#include "qt1010.h"14 15/* debug */16static int dvb_usb_dtv5100_debug;17module_param_named(debug, dvb_usb_dtv5100_debug, int, 0644);18MODULE_PARM_DESC(debug, "set debugging level" DVB_USB_DEBUG_STATUS);19DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);20 21struct dtv5100_state {22	unsigned char data[80];23};24 25static int dtv5100_i2c_msg(struct dvb_usb_device *d, u8 addr,26			   u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)27{28	struct dtv5100_state *st = d->priv;29	unsigned int pipe;30	u8 request;31	u8 type;32	u16 value;33	u16 index;34 35	switch (wlen) {36	case 1:37		/* write { reg }, read { value } */38		pipe = usb_rcvctrlpipe(d->udev, 0);39		request = (addr == DTV5100_DEMOD_ADDR ? DTV5100_DEMOD_READ :40							DTV5100_TUNER_READ);41		type = USB_TYPE_VENDOR | USB_DIR_IN;42		value = 0;43		break;44	case 2:45		/* write { reg, value } */46		pipe = usb_sndctrlpipe(d->udev, 0);47		request = (addr == DTV5100_DEMOD_ADDR ? DTV5100_DEMOD_WRITE :48							DTV5100_TUNER_WRITE);49		type = USB_TYPE_VENDOR | USB_DIR_OUT;50		value = wbuf[1];51		break;52	default:53		warn("wlen = %x, aborting.", wlen);54		return -EINVAL;55	}56	index = (addr << 8) + wbuf[0];57 58	memcpy(st->data, rbuf, rlen);59	msleep(1); /* avoid I2C errors */60	return usb_control_msg(d->udev, pipe, request,61			       type, value, index, st->data, rlen,62			       DTV5100_USB_TIMEOUT);63}64 65/* I2C */66static int dtv5100_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],67			    int num)68{69	struct dvb_usb_device *d = i2c_get_adapdata(adap);70	int i;71 72	if (num > 2)73		return -EINVAL;74 75	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)76		return -EAGAIN;77 78	for (i = 0; i < num; i++) {79		/* write/read request */80		if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {81			if (dtv5100_i2c_msg(d, msg[i].addr, msg[i].buf,82					    msg[i].len, msg[i+1].buf,83					    msg[i+1].len) < 0)84				break;85			i++;86		} else if (dtv5100_i2c_msg(d, msg[i].addr, msg[i].buf,87					   msg[i].len, NULL, 0) < 0)88				break;89	}90 91	mutex_unlock(&d->i2c_mutex);92	return i;93}94 95static u32 dtv5100_i2c_func(struct i2c_adapter *adapter)96{97	return I2C_FUNC_I2C;98}99 100static struct i2c_algorithm dtv5100_i2c_algo = {101	.master_xfer   = dtv5100_i2c_xfer,102	.functionality = dtv5100_i2c_func,103};104 105/* Callbacks for DVB USB */106static struct zl10353_config dtv5100_zl10353_config = {107	.demod_address = DTV5100_DEMOD_ADDR,108	.no_tuner = 1,109	.parallel_ts = 1,110};111 112static int dtv5100_frontend_attach(struct dvb_usb_adapter *adap)113{114	adap->fe_adap[0].fe = dvb_attach(zl10353_attach, &dtv5100_zl10353_config,115			      &adap->dev->i2c_adap);116	if (adap->fe_adap[0].fe == NULL)117		return -EIO;118 119	/* disable i2c gate, or it won't work... is this safe? */120	adap->fe_adap[0].fe->ops.i2c_gate_ctrl = NULL;121 122	return 0;123}124 125static struct qt1010_config dtv5100_qt1010_config = {126	.i2c_address = DTV5100_TUNER_ADDR127};128 129static int dtv5100_tuner_attach(struct dvb_usb_adapter *adap)130{131	return dvb_attach(qt1010_attach,132			  adap->fe_adap[0].fe, &adap->dev->i2c_adap,133			  &dtv5100_qt1010_config) == NULL ? -ENODEV : 0;134}135 136/* DVB USB Driver stuff */137static struct dvb_usb_device_properties dtv5100_properties;138 139static int dtv5100_probe(struct usb_interface *intf,140			 const struct usb_device_id *id)141{142	int i, ret;143	struct usb_device *udev = interface_to_usbdev(intf);144 145	/* initialize non qt1010/zl10353 part? */146	for (i = 0; dtv5100_init[i].request; i++) {147		ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),148				      dtv5100_init[i].request,149				      USB_TYPE_VENDOR | USB_DIR_OUT,150				      dtv5100_init[i].value,151				      dtv5100_init[i].index, NULL, 0,152				      DTV5100_USB_TIMEOUT);153		if (ret)154			return ret;155	}156 157	ret = dvb_usb_device_init(intf, &dtv5100_properties,158				  THIS_MODULE, NULL, adapter_nr);159	if (ret)160		return ret;161 162	return 0;163}164 165enum {166	AME_DTV5100,167};168 169static struct usb_device_id dtv5100_table[] = {170	DVB_USB_DEV(AME, AME_DTV5100),171	{ }172};173 174MODULE_DEVICE_TABLE(usb, dtv5100_table);175 176static struct dvb_usb_device_properties dtv5100_properties = {177	.caps = DVB_USB_IS_AN_I2C_ADAPTER,178	.usb_ctrl = DEVICE_SPECIFIC,179 180	.size_of_priv = sizeof(struct dtv5100_state),181 182	.num_adapters = 1,183	.adapter = {{184		.num_frontends = 1,185		.fe = {{186		.frontend_attach = dtv5100_frontend_attach,187		.tuner_attach    = dtv5100_tuner_attach,188 189		.stream = {190			.type = USB_BULK,191			.count = 8,192			.endpoint = 0x82,193			.u = {194				.bulk = {195					.buffersize = 4096,196				}197			}198		},199		}},200	} },201 202	.i2c_algo = &dtv5100_i2c_algo,203 204	.num_device_descs = 1,205	.devices = {206		{207			.name = "AME DTV-5100 USB2.0 DVB-T",208			.cold_ids = { NULL },209			.warm_ids = { &dtv5100_table[AME_DTV5100], NULL },210		},211	}212};213 214static struct usb_driver dtv5100_driver = {215	.name		= "dvb_usb_dtv5100",216	.probe		= dtv5100_probe,217	.disconnect	= dvb_usb_device_exit,218	.id_table	= dtv5100_table,219};220 221module_usb_driver(dtv5100_driver);222 223MODULE_AUTHOR(DRIVER_AUTHOR);224MODULE_DESCRIPTION(DRIVER_DESC);225MODULE_LICENSE("GPL");226