290 lines
6.9 KiB
C
290 lines
6.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* ZyDAS ZD1301 driver (USB interface)
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*
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* Copyright (C) 2015 Antti Palosaari <crope@iki.fi>
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*/
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#include "dvb_usb.h"
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#include "zd1301_demod.h"
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#include "mt2060.h"
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#include <linux/i2c.h>
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#include <linux/platform_device.h>
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DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
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struct zd1301_dev {
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#define BUF_LEN 8
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u8 buf[BUF_LEN]; /* bulk USB control message */
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struct zd1301_demod_platform_data demod_pdata;
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struct mt2060_platform_data mt2060_pdata;
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struct platform_device *platform_device_demod;
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struct i2c_client *i2c_client_tuner;
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};
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static int zd1301_ctrl_msg(struct dvb_usb_device *d, const u8 *wbuf,
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unsigned int wlen, u8 *rbuf, unsigned int rlen)
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{
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struct zd1301_dev *dev = d_to_priv(d);
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struct usb_interface *intf = d->intf;
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int ret, actual_length;
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mutex_lock(&d->usb_mutex);
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memcpy(&dev->buf, wbuf, wlen);
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dev_dbg(&intf->dev, ">>> %*ph\n", wlen, dev->buf);
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ret = usb_bulk_msg(d->udev, usb_sndbulkpipe(d->udev, 0x04), dev->buf,
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wlen, &actual_length, 1000);
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if (ret) {
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dev_err(&intf->dev, "1st usb_bulk_msg() failed %d\n", ret);
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goto err_mutex_unlock;
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}
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if (rlen) {
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ret = usb_bulk_msg(d->udev, usb_rcvbulkpipe(d->udev, 0x83),
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dev->buf, rlen, &actual_length, 1000);
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if (ret) {
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dev_err(&intf->dev,
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"2nd usb_bulk_msg() failed %d\n", ret);
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goto err_mutex_unlock;
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}
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dev_dbg(&intf->dev, "<<< %*ph\n", actual_length, dev->buf);
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if (actual_length != rlen) {
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/*
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* Chip replies often with 3 byte len stub. On that case
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* we have to query new reply.
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*/
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dev_dbg(&intf->dev, "repeating reply message\n");
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ret = usb_bulk_msg(d->udev,
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usb_rcvbulkpipe(d->udev, 0x83),
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dev->buf, rlen, &actual_length,
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1000);
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if (ret) {
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dev_err(&intf->dev,
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"3rd usb_bulk_msg() failed %d\n", ret);
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goto err_mutex_unlock;
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}
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dev_dbg(&intf->dev,
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"<<< %*ph\n", actual_length, dev->buf);
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}
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memcpy(rbuf, dev->buf, rlen);
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}
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err_mutex_unlock:
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mutex_unlock(&d->usb_mutex);
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return ret;
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}
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static int zd1301_demod_wreg(void *reg_priv, u16 reg, u8 val)
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{
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struct dvb_usb_device *d = reg_priv;
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struct usb_interface *intf = d->intf;
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int ret;
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u8 buf[7] = {0x07, 0x00, 0x03, 0x01,
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(reg >> 0) & 0xff, (reg >> 8) & 0xff, val};
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ret = zd1301_ctrl_msg(d, buf, 7, NULL, 0);
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if (ret)
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goto err;
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return 0;
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err:
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dev_dbg(&intf->dev, "failed=%d\n", ret);
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return ret;
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}
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static int zd1301_demod_rreg(void *reg_priv, u16 reg, u8 *val)
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{
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struct dvb_usb_device *d = reg_priv;
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struct usb_interface *intf = d->intf;
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int ret;
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u8 buf[7] = {0x07, 0x00, 0x04, 0x01,
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(reg >> 0) & 0xff, (reg >> 8) & 0xff, 0};
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ret = zd1301_ctrl_msg(d, buf, 7, buf, 7);
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if (ret)
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goto err;
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*val = buf[6];
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return 0;
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err:
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dev_dbg(&intf->dev, "failed=%d\n", ret);
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return ret;
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}
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static int zd1301_frontend_attach(struct dvb_usb_adapter *adap)
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{
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struct dvb_usb_device *d = adap_to_d(adap);
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struct zd1301_dev *dev = adap_to_priv(adap);
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struct usb_interface *intf = d->intf;
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struct platform_device *pdev;
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struct i2c_client *client;
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struct i2c_board_info board_info;
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struct i2c_adapter *adapter;
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struct dvb_frontend *frontend;
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int ret;
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dev_dbg(&intf->dev, "\n");
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/* Add platform demod */
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dev->demod_pdata.reg_priv = d;
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dev->demod_pdata.reg_read = zd1301_demod_rreg;
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dev->demod_pdata.reg_write = zd1301_demod_wreg;
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request_module("%s", "zd1301_demod");
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pdev = platform_device_register_data(&intf->dev,
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"zd1301_demod",
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PLATFORM_DEVID_AUTO,
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&dev->demod_pdata,
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sizeof(dev->demod_pdata));
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if (IS_ERR(pdev)) {
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ret = PTR_ERR(pdev);
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goto err;
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}
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if (!pdev->dev.driver) {
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ret = -ENODEV;
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goto err;
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}
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if (!try_module_get(pdev->dev.driver->owner)) {
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ret = -ENODEV;
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goto err_platform_device_unregister;
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}
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adapter = zd1301_demod_get_i2c_adapter(pdev);
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frontend = zd1301_demod_get_dvb_frontend(pdev);
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if (!adapter || !frontend) {
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ret = -ENODEV;
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goto err_module_put_demod;
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}
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/* Add I2C tuner */
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dev->mt2060_pdata.i2c_write_max = 9;
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dev->mt2060_pdata.dvb_frontend = frontend;
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memset(&board_info, 0, sizeof(board_info));
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strscpy(board_info.type, "mt2060", I2C_NAME_SIZE);
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board_info.addr = 0x60;
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board_info.platform_data = &dev->mt2060_pdata;
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request_module("%s", "mt2060");
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client = i2c_new_device(adapter, &board_info);
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if (!client || !client->dev.driver) {
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ret = -ENODEV;
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goto err_module_put_demod;
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}
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if (!try_module_get(client->dev.driver->owner)) {
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ret = -ENODEV;
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goto err_i2c_unregister_device;
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}
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dev->platform_device_demod = pdev;
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dev->i2c_client_tuner = client;
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adap->fe[0] = frontend;
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return 0;
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err_i2c_unregister_device:
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i2c_unregister_device(client);
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err_module_put_demod:
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module_put(pdev->dev.driver->owner);
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err_platform_device_unregister:
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platform_device_unregister(pdev);
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err:
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dev_dbg(&intf->dev, "failed=%d\n", ret);
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return ret;
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}
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static int zd1301_frontend_detach(struct dvb_usb_adapter *adap)
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{
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struct dvb_usb_device *d = adap_to_d(adap);
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struct zd1301_dev *dev = d_to_priv(d);
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struct usb_interface *intf = d->intf;
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struct platform_device *pdev;
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struct i2c_client *client;
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dev_dbg(&intf->dev, "\n");
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client = dev->i2c_client_tuner;
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pdev = dev->platform_device_demod;
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/* Remove I2C tuner */
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if (client) {
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module_put(client->dev.driver->owner);
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i2c_unregister_device(client);
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}
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/* Remove platform demod */
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if (pdev) {
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module_put(pdev->dev.driver->owner);
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platform_device_unregister(pdev);
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}
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return 0;
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}
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static int zd1301_streaming_ctrl(struct dvb_frontend *fe, int onoff)
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{
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struct dvb_usb_device *d = fe_to_d(fe);
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struct usb_interface *intf = d->intf;
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int ret;
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u8 buf[3] = {0x03, 0x00, onoff ? 0x07 : 0x08};
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dev_dbg(&intf->dev, "onoff=%d\n", onoff);
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ret = zd1301_ctrl_msg(d, buf, 3, NULL, 0);
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if (ret)
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goto err;
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return 0;
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err:
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dev_dbg(&intf->dev, "failed=%d\n", ret);
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return ret;
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}
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static const struct dvb_usb_device_properties zd1301_props = {
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.driver_name = KBUILD_MODNAME,
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.owner = THIS_MODULE,
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.adapter_nr = adapter_nr,
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.size_of_priv = sizeof(struct zd1301_dev),
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.frontend_attach = zd1301_frontend_attach,
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.frontend_detach = zd1301_frontend_detach,
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.streaming_ctrl = zd1301_streaming_ctrl,
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.num_adapters = 1,
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.adapter = {
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{
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.stream = DVB_USB_STREAM_BULK(0x81, 6, 21 * 188),
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},
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},
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};
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static const struct usb_device_id zd1301_id_table[] = {
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{DVB_USB_DEVICE(USB_VID_ZYDAS, 0x13a1, &zd1301_props,
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"ZyDAS ZD1301 reference design", NULL)},
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{}
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};
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MODULE_DEVICE_TABLE(usb, zd1301_id_table);
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/* Usb specific object needed to register this driver with the usb subsystem */
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static struct usb_driver zd1301_usb_driver = {
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.name = KBUILD_MODNAME,
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.id_table = zd1301_id_table,
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.probe = dvb_usbv2_probe,
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.disconnect = dvb_usbv2_disconnect,
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.suspend = dvb_usbv2_suspend,
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.resume = dvb_usbv2_resume,
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.reset_resume = dvb_usbv2_reset_resume,
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.no_dynamic_id = 1,
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.soft_unbind = 1,
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};
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module_usb_driver(zd1301_usb_driver);
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MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
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MODULE_DESCRIPTION("ZyDAS ZD1301 driver");
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MODULE_LICENSE("GPL");
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