1 files changed, 295 insertions, 0 deletions

diff --git a/drivers/media/dvb/dvb-usb/cxusb.c b/drivers/media/dvb/dvb-usb/cxusb.c
new file mode 100644
index 000000000000..c3e1b661aae6
--- /dev/null
+++ b/drivers/media/dvb/dvb-usb/cxusb.c
@@ -0,0 +1,295 @@
+/* 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
+ *
+ * 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)
+{
+        u8 buf[2] = { 0x03, 0x00 };
+        if (onoff)
+                cxusb_ctrl_msg(d,0x36, buf, 2, NULL, 0);
+        else
+                cxusb_ctrl_msg(d,0x37, NULL, 0, NULL, 0);
+
+        return 0;
+}
+
+struct cx22702_config cxusb_cx22702_config = {
+        .demod_address = 0x63,
+
+        .output_mode = CX22702_PARALLEL_OUTPUT,
+
+        .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;
+
+        if (usb_set_interface(d->udev,0,0) < 0)
+                err("set interface to alts=0 failed");
+
+        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");
+
+        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 = 32,
+                                .framesize = 940,
+                                .interval = 5,
+                        }
+                }
+        },
+
+        .num_device_descs = 1,
+        .devices = {
+                {   "Medion MD95700 (MDUSBTV-HYBRID)",
+                        { NULL },
+                        { &cxusb_table[0], NULL },
+                },
+        }
+};
+
+static struct usb_driver cxusb_driver = {
+        .owner          = THIS_MODULE,
+        .name           = "dvb_usb_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");