--- /dev/null
+/* DVB USB compliant linux driver for Conexant USB reference design.
+ *
+ * The Conexant reference design I saw on their website was only for analogue
+ * capturing (using the cx25842). The box I took to write this driver (reverse
+ * engineered) is the one labeled Medion MD95700. In addition to the cx25842
+ * for analogue capturing it also has a cx22702 DVB-T demodulator on the main
+ * board. Besides it has a atiremote (X10) and a USB2.0 hub onboard.
+ *
+ * Maybe it is a little bit premature to call this driver cxusb, but I assume
+ * the USB protocol is identical or at least inherited from the reference
+ * design, so it can be reused for the "analogue-only" device (if it will
+ * appear at all).
+ *
+ * TODO: check if the cx25840-driver (from ivtv) can be used for the analogue
+ * part
+ *
+ * FIXME: We're getting a lock and signal, but the isochronous transfer is empty
+ * for DVB-T.
+ *
+ * Copyright (C) 2005 Patrick Boettcher (patrick.boettcher@desy.de)
+ *
+ * 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, version 2.
+ *
+ * see Documentation/dvb/README.dvb-usb for more information
+ */
+#include "cxusb.h"
+
+#include "cx22702.h"
+
+/* debug */
+int dvb_usb_cxusb_debug;
+module_param_named(debug,dvb_usb_cxusb_debug, int, 0644);
+MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);
+
+static int cxusb_ctrl_msg(struct dvb_usb_device *d,
+ u8 cmd, u8 *wbuf, int wlen, u8 *rbuf, int rlen)
+{
+ int wo = (rbuf == NULL || rlen == 0); /* write-only */
+ u8 sndbuf[1+wlen];
+ memset(sndbuf,0,1+wlen);
+
+ sndbuf[0] = cmd;
+ memcpy(&sndbuf[1],wbuf,wlen);
+ if (wo)
+ dvb_usb_generic_write(d,sndbuf,1+wlen);
+ else
+ dvb_usb_generic_rw(d,sndbuf,1+wlen,rbuf,rlen,0);
+
+ return 0;
+}
+
+/* I2C */
+static void cxusb_set_i2c_path(struct dvb_usb_device *d, enum cxusb_i2c_pathes path)
+{
+ struct cxusb_state *st = d->priv;
+ u8 o[2],i;
+
+ if (path == st->cur_i2c_path)
+ return;
+
+ o[0] = IOCTL_SET_I2C_PATH;
+ switch (path) {
+ case PATH_CX22702:
+ o[1] = 0;
+ break;
+ case PATH_TUNER_OTHER:
+ o[1] = 1;
+ break;
+ default:
+ err("unkown i2c path");
+ return;
+ }
+ cxusb_ctrl_msg(d,CMD_IOCTL,o,2,&i,1);
+
+ if (i != 0x01)
+ deb_info("i2c_path setting failed.\n");
+
+ st->cur_i2c_path = path;
+}
+
+static int cxusb_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg msg[],int num)
+{
+ struct dvb_usb_device *d = i2c_get_adapdata(adap);
+ int i;
+
+ if (down_interruptible(&d->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++) {
+
+ switch (msg[i].addr) {
+ case 0x63:
+ cxusb_set_i2c_path(d,PATH_CX22702);
+ break;
+ default:
+ cxusb_set_i2c_path(d,PATH_TUNER_OTHER);
+ break;
+ }
+
+ /* read request */
+ if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
+ u8 obuf[3+msg[i].len], ibuf[1+msg[i+1].len];
+ obuf[0] = msg[i].len;
+ obuf[1] = msg[i+1].len;
+ obuf[2] = msg[i].addr;
+ memcpy(&obuf[3],msg[i].buf,msg[i].len);
+
+ if (cxusb_ctrl_msg(d, CMD_I2C_READ,
+ obuf, 3+msg[i].len,
+ ibuf, 1+msg[i+1].len) < 0)
+ break;
+
+ if (ibuf[0] != 0x08)
+ deb_info("i2c read could have been failed\n");
+
+ memcpy(msg[i+1].buf,&ibuf[1],msg[i+1].len);
+
+ i++;
+ } else { /* write */
+ u8 obuf[2+msg[i].len], ibuf;
+ obuf[0] = msg[i].addr;
+ obuf[1] = msg[i].len;
+ memcpy(&obuf[2],msg[i].buf,msg[i].len);
+
+ if (cxusb_ctrl_msg(d,CMD_I2C_WRITE, obuf, 2+msg[i].len, &ibuf,1) < 0)
+ break;
+ if (ibuf != 0x08)
+ deb_info("i2c write could have been failed\n");
+ }
+ }
+
+ up(&d->i2c_sem);
+ return i;
+}
+
+static u32 cxusb_i2c_func(struct i2c_adapter *adapter)
+{
+ return I2C_FUNC_I2C;
+}
+
+static struct i2c_algorithm cxusb_i2c_algo = {
+ .name = "Conexant USB I2C algorithm",
+ .id = I2C_ALGO_BIT,
+ .master_xfer = cxusb_i2c_xfer,
+ .functionality = cxusb_i2c_func,
+};
+
+static int cxusb_power_ctrl(struct dvb_usb_device *d, int onoff)
+{
+ return 0;
+}
+
+static int cxusb_streaming_ctrl(struct dvb_usb_device *d, int onoff)
+{
+ return 0;
+}
+
+struct cx22702_config cxusb_cx22702_config = {
+ .demod_address = 0x63,
+
+ .pll_init = dvb_usb_pll_init_i2c,
+ .pll_set = dvb_usb_pll_set_i2c,
+};
+
+/* Callbacks for DVB USB */
+static int cxusb_tuner_attach(struct dvb_usb_device *d)
+{
+ u8 bpll[4] = { 0x0b, 0xdc, 0x9c, 0xa0 };
+ d->pll_addr = 0x61;
+ memcpy(d->pll_init,bpll,4);
+ d->pll_desc = &dvb_pll_fmd1216me;
+ return 0;
+}
+
+static int cxusb_frontend_attach(struct dvb_usb_device *d)
+{
+ u8 buf[2] = { 0x03, 0x00 };
+ u8 b = 0;
+
+ cxusb_ctrl_msg(d,0xde,&b,0,NULL,0);
+ cxusb_set_i2c_path(d,PATH_TUNER_OTHER);
+ cxusb_ctrl_msg(d,CMD_POWER_OFF, NULL, 0, &b, 1);
+
+ if (usb_set_interface(d->udev,0,6) < 0)
+ err("set interface failed\n");
+
+ cxusb_ctrl_msg(d,0x36, buf, 2, NULL, 0);
+ cxusb_set_i2c_path(d,PATH_CX22702);
+ cxusb_ctrl_msg(d,CMD_POWER_ON, NULL, 0, &b, 1);
+
+ if ((d->fe = cx22702_attach(&cxusb_cx22702_config, &d->i2c_adap)) != NULL)
+ return 0;
+
+ return -EIO;
+}
+
+/* DVB USB Driver stuff */
+static struct dvb_usb_properties cxusb_properties;
+
+static int cxusb_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ return dvb_usb_device_init(intf,&cxusb_properties,THIS_MODULE);
+}
+
+static struct usb_device_id cxusb_table [] = {
+ { USB_DEVICE(USB_VID_MEDION, USB_PID_MEDION_MD95700) },
+ {} /* Terminating entry */
+};
+MODULE_DEVICE_TABLE (usb, cxusb_table);
+
+static struct dvb_usb_properties cxusb_properties = {
+ .caps = DVB_USB_IS_AN_I2C_ADAPTER,
+
+ .usb_ctrl = CYPRESS_FX2,
+
+ .size_of_priv = sizeof(struct cxusb_state),
+
+ .streaming_ctrl = cxusb_streaming_ctrl,
+ .power_ctrl = cxusb_power_ctrl,
+ .frontend_attach = cxusb_frontend_attach,
+ .tuner_attach = cxusb_tuner_attach,
+
+ .i2c_algo = &cxusb_i2c_algo,
+
+ .generic_bulk_ctrl_endpoint = 0x01,
+ /* parameter for the MPEG2-data transfer */
+ .urb = {
+ .type = DVB_USB_ISOC,
+ .count = 5,
+ .endpoint = 0x02,
+ .u = {
+ .isoc = {
+ .framesperurb = 64,
+ .framesize = 940*3,
+ .interval = 1,
+ }
+ }
+ },
+
+ .num_device_descs = 1,
+ .devices = {
+ { "Medion MD95700 (MDUSBTV-HYBRID)",
+ { NULL },
+ { &cxusb_table[0], NULL },
+ },
+ }
+};
+
+static struct usb_driver cxusb_driver = {
+ .owner = THIS_MODULE,
+ .name = "cxusb",
+ .probe = cxusb_probe,
+ .disconnect = dvb_usb_device_exit,
+ .id_table = cxusb_table,
+};
+
+/* module stuff */
+static int __init cxusb_module_init(void)
+{
+ int result;
+ if ((result = usb_register(&cxusb_driver))) {
+ err("usb_register failed. Error number %d",result);
+ return result;
+ }
+
+ return 0;
+}
+
+static void __exit cxusb_module_exit(void)
+{
+ /* deregister this driver from the USB subsystem */
+ usb_deregister(&cxusb_driver);
+}
+
+module_init (cxusb_module_init);
+module_exit (cxusb_module_exit);
+
+MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
+MODULE_DESCRIPTION("Driver for Conexant USB2.0 hybrid reference design");
+MODULE_VERSION("1.0-alpha");
+MODULE_LICENSE("GPL");
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff