/*
* ZyDAS ZD1301 driver (USB interface)
*
* Copyright (C) 2015 Antti Palosaari <crope@iki.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "dvb_usb.h"
#include "zd1301_demod.h"
#include "mt2060.h"
#include <linux/i2c.h>
#include <linux/platform_device.h>
DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
struct zd1301_dev {
#define BUF_LEN 8
u8 buf[BUF_LEN]; /* bulk USB control message */
struct zd1301_demod_platform_data demod_pdata;
struct mt2060_platform_data mt2060_pdata;
struct platform_device *platform_device_demod;
struct i2c_client *i2c_client_tuner;
};
static int zd1301_ctrl_msg(struct dvb_usb_device *d, const u8 *wbuf,
unsigned int wlen, u8 *rbuf, unsigned int rlen)
{
struct zd1301_dev *dev = d_to_priv(d);
struct usb_interface *intf = d->intf;
int ret, actual_length;
mutex_lock(&d->usb_mutex);
memcpy(&dev->buf, wbuf, wlen);
dev_dbg(&intf->dev, ">>> %*ph\n", wlen, dev->buf);
ret = usb_bulk_msg(d->udev, usb_sndbulkpipe(d->udev, 0x04), dev->buf,
wlen, &actual_length, 1000);
if (ret) {
dev_err(&intf->dev, "1st usb_bulk_msg() failed %d\n", ret);
goto err_mutex_unlock;
}
if (rlen) {
ret = usb_bulk_msg(d->udev, usb_rcvbulkpipe(d->udev, 0x83),
dev->buf, rlen, &actual_length, 1000);
if (ret) {
dev_err(&intf->dev,
"2nd usb_bulk_msg() failed %d\n", ret);
goto err_mutex_unlock;
}
dev_dbg(&intf->dev, "<<< %*ph\n", actual_length, dev->buf);
if (actual_length != rlen) {
/*
* Chip replies often with 3 byte len stub. On that case
* we have to query new reply.
*/
dev_dbg(&intf->dev, "repeating reply message\n");
ret = usb_bulk_msg(d->udev,
usb_rcvbulkpipe(d->udev, 0x83),
dev->buf, rlen, &actual_length,
1000);
if (ret) {
dev_err(&intf->dev,
"3rd usb_bulk_msg() failed %d\n", ret);
goto err_mutex_unlock;
}
dev_dbg(&intf->dev,
"<<< %*ph\n", actual_length, dev->buf);
}
memcpy(rbuf, dev->buf, rlen);
}
err_mutex_unlock:
mutex_unlock(&d->usb_mutex);
return ret;
}
static int zd1301_demod_wreg(void *reg_priv, u16 reg, u8 val)
{
struct dvb_usb_device *d = reg_priv;
struct usb_interface *intf = d->intf;
int ret;
u8 buf[7] = {0x07, 0x00, 0x03, 0x01,
(reg >> 0) & 0xff, (reg >> 8) & 0xff, val};
ret = zd1301_ctrl_msg(d, buf, 7, NULL, 0);
if (ret)
goto err;
return 0;
err:
dev_dbg(&intf->dev, "failed=%d\n", ret);
return ret;
}
static int zd1301_demod_rreg(void *reg_priv, u16 reg, u8 *val)
{
struct dvb_usb_device *d = reg_priv;
struct usb_interface *intf = d->intf;
int ret;
u8 buf[7] = {0x07, 0x00, 0x04, 0x01,
(reg >> 0) & 0xff, (reg >> 8) & 0xff, 0};
ret = zd1301_ctrl_msg(d, buf, 7, buf, 7);
if (ret)
goto err;
*val = buf[6];
return 0;
err:
dev_dbg(&intf->dev, "failed=%d\n", ret);
return ret;
}
static int zd1301_frontend_attach(struct dvb_usb_adapter *adap)
{
struct dvb_usb_device *d = adap_to_d(adap);
struct zd1301_dev *dev = adap_to_priv(adap);
struct usb_interface *intf = d->intf;
struct platform_device *pdev;
struct i2c_client *client;
struct i2c_board_info board_info;
struct i2c_adapter *adapter;
struct dvb_frontend *frontend;
int ret;
dev_dbg(&intf->dev, "\n");
/* Add platform demod */
dev->demod_pdata.reg_priv = d;
dev->demod_pdata.reg_read = zd1301_demod_rreg;
dev->demod_pdata.reg_write = zd1301_demod_wreg;
request_module("%s", "zd1301_demod");
pdev = platform_device_register_data(&intf->dev,
"zd1301_demod",
PLATFORM_DEVID_AUTO,
&dev->demod_pdata,
sizeof(dev->demod_pdata));
if (IS_ERR(pdev)) {
ret = PTR_ERR(pdev);
goto err;
}
if (!pdev->dev.driver) {
ret = -ENODEV;
goto err;
}
if (!try_module_get(pdev->dev.driver->owner)) {
ret = -ENODEV;
goto err_platform_device_unregister;
}
adapter = zd1301_demod_get_i2c_adapter(pdev);
frontend = zd1301_demod_get_dvb_frontend(pdev);
if (!adapter || !frontend) {
ret = -ENODEV;
goto err_module_put_demod;
}
/* Add I2C tuner */
dev->mt2060_pdata.i2c_write_max = 9;
dev->mt2060_pdata.dvb_frontend = frontend;
memset(&board_info, 0, sizeof(board_info));
strlcpy(board_info.type, "mt2060", I2C_NAME_SIZE);
board_info.addr = 0x60;
board_info.platform_data = &dev->mt2060_pdata;
request_module("%s", "mt2060");
client = i2c_new_device(adapter, &board_info);
if (!client || !client->dev.driver) {
ret = -ENODEV;
goto err_module_put_demod;
}
if (!try_module_get(client->dev.driver->owner)) {
ret = -ENODEV;
goto err_i2c_unregister_device;
}
dev->platform_device_demod = pdev;
dev->i2c_client_tuner = client;
adap->fe[0] = frontend;
return 0;
err_i2c_unregister_device:
i2c_unregister_device(client);
err_module_put_demod:
module_put(pdev->dev.driver->owner);
err_platform_device_unregister:
platform_device_unregister(pdev);
err:
dev_dbg(&intf->dev, "failed=%d\n", ret);
return ret;
}
static int zd1301_frontend_detach(struct dvb_usb_adapter *adap)
{
struct dvb_usb_device *d = adap_to_d(adap);
struct zd1301_dev *dev = d_to_priv(d);
struct usb_interface *intf = d->intf;
struct platform_device *pdev;
struct i2c_client *client;
dev_dbg(&intf->dev, "\n");
client = dev->i2c_client_tuner;
pdev = dev->platform_device_demod;
/* Remove I2C tuner */
if (client) {
module_put(client->dev.driver->owner);
i2c_unregister_device(client);
}
/* Remove platform demod */
if (pdev) {
module_put(pdev->dev.driver->owner);
platform_device_unregister(pdev);
}
return 0;
}
static int zd1301_streaming_ctrl(struct dvb_frontend *fe, int onoff)
{
struct dvb_usb_device *d = fe_to_d(fe);
struct usb_interface *intf = d->intf;
int ret;
u8 buf[3] = {0x03, 0x00, onoff ? 0x07 : 0x08};
dev_dbg(&intf->dev, "onoff=%d\n", onoff);
ret = zd1301_ctrl_msg(d, buf, 3, NULL, 0);
if (ret)
goto err;
return 0;
err:
dev_dbg(&intf->dev, "failed=%d\n", ret);
return ret;
}
static const struct dvb_usb_device_properties zd1301_props = {
.driver_name = KBUILD_MODNAME,
.owner = THIS_MODULE,
.adapter_nr = adapter_nr,
.size_of_priv = sizeof(struct zd1301_dev),
.frontend_attach = zd1301_frontend_attach,
.frontend_detach = zd1301_frontend_detach,
.streaming_ctrl = zd1301_streaming_ctrl,
.num_adapters = 1,
.adapter = {
{
.stream = DVB_USB_STREAM_BULK(0x81, 6, 21 * 188),
},
},
};
static const struct usb_device_id zd1301_id_table[] = {
{DVB_USB_DEVICE(USB_VID_ZYDAS, 0x13a1, &zd1301_props,
"ZyDAS ZD1301 reference design", NULL)},
{}
};
MODULE_DEVICE_TABLE(usb, zd1301_id_table);
/* Usb specific object needed to register this driver with the usb subsystem */
static struct usb_driver zd1301_usb_driver = {
.name = KBUILD_MODNAME,
.id_table = zd1301_id_table,
.probe = dvb_usbv2_probe,
.disconnect = dvb_usbv2_disconnect,
.suspend = dvb_usbv2_suspend,
.resume = dvb_usbv2_resume,
.reset_resume = dvb_usbv2_reset_resume,
.no_dynamic_id = 1,
.soft_unbind = 1,
};
module_usb_driver(zd1301_usb_driver);
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_DESCRIPTION("ZyDAS ZD1301 driver");
MODULE_LICENSE("GPL");
