diff options
Diffstat (limited to 'drivers/media/usb/dvb-usb-v2/zd1301.c')
| -rw-r--r-- | drivers/media/usb/dvb-usb-v2/zd1301.c | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/drivers/media/usb/dvb-usb-v2/zd1301.c b/drivers/media/usb/dvb-usb-v2/zd1301.c new file mode 100644 index 000000000..72aa6a9a9 --- /dev/null +++ b/drivers/media/usb/dvb-usb-v2/zd1301.c @@ -0,0 +1,289 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * ZyDAS ZD1301 driver (USB interface) + * + * Copyright (C) 2015 Antti Palosaari <crope@iki.fi> + */ + +#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_platform_device_unregister; + } + 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)); + strscpy(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_client_device(adapter, &board_info); + if (!i2c_client_has_driver(client)) { + 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"); |