[PATCH] dvb: Add generalized dvb-usb driver

Add generalized dvb-usb driver which supports a wide variety of devices.

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 282 insertions, 0 deletions

diff --git a/drivers/media/dvb/dvb-usb/digitv.c b/drivers/media/dvb/dvb-usb/digitv.c
new file mode 100644
index 000000000000..5acf3fde9522
--- /dev/null
+++ b/drivers/media/dvb/dvb-usb/digitv.c
@@ -0,0 +1,282 @@
+/* DVB USB compliant linux driver for Nebula Electronics uDigiTV DVB-T USB2.0
+ * receiver
+ *
+ * Copyright (C) 2005 Patrick Boettcher (patrick.boettcher@desy.de) and
+ *                    Allan Third (allan.third@cs.man.ac.uk)
+ *
+ * partly based on the SDK published by Nebula Electronics (TODO do we want this line ?)
+ *
+ *      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 "digitv.h"
+
+#include "mt352.h"
+#include "nxt6000.h"
+
+/* debug */
+int dvb_usb_digitv_debug;
+module_param_named(debug,dvb_usb_digitv_debug, int, 0644);
+MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);
+
+static int digitv_ctrl_msg(struct dvb_usb_device *d,
+                u8 cmd, u8 vv, u8 *wbuf, int wlen, u8 *rbuf, int rlen)
+{
+        int wo = (rbuf == NULL || rlen == 0); /* write-only */
+        u8 sndbuf[7],rcvbuf[7];
+        memset(sndbuf,0,7); memset(rcvbuf,0,7);
+
+        sndbuf[0] = cmd;
+        sndbuf[1] = vv;
+        sndbuf[2] = wo ? wlen : rlen;
+
+        if (!wo) {
+                memcpy(&sndbuf[3],wbuf,wlen);
+                dvb_usb_generic_write(d,sndbuf,7);
+        } else {
+                dvb_usb_generic_rw(d,sndbuf,7,rcvbuf,7,10);
+                memcpy(&rbuf,&rcvbuf[3],rlen);
+        }
+        return 0;
+}
+
+/* I2C */
+static int digitv_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++) {
+                /* write/read request */
+                if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
+                        if (digitv_ctrl_msg(d, USB_READ_COFDM, msg[i].buf[0], NULL, 0,
+                                                msg[i+1].buf,msg[i+1].len) < 0)
+                                break;
+                        i++;
+                } else
+                        if (digitv_ctrl_msg(d,USB_WRITE_COFDM, msg[i].buf[0],
+                                                &msg[i].buf[1],msg[i].len-1,NULL,0) < 0)
+                                break;
+        }
+
+        up(&d->i2c_sem);
+        return i;
+}
+
+static u32 digitv_i2c_func(struct i2c_adapter *adapter)
+{
+        return I2C_FUNC_I2C;
+}
+
+static struct i2c_algorithm digitv_i2c_algo = {
+        .name          = "Nebula DigiTV USB I2C algorithm",
+        .id            = I2C_ALGO_BIT,
+        .master_xfer   = digitv_i2c_xfer,
+        .functionality = digitv_i2c_func,
+};
+
+/* Callbacks for DVB USB */
+static int digitv_identify_state (struct usb_device *udev, struct
+                dvb_usb_properties *props, struct dvb_usb_device_description **desc,
+                int *cold)
+{
+        *cold = udev->descriptor.iManufacturer == 0 && udev->descriptor.iProduct == 0;
+        return 0;
+}
+
+static int digitv_mt352_demod_init(struct dvb_frontend *fe)
+{
+        static u8 mt352_clock_config[] = { 0x89, 0x38, 0x2d };
+        static u8 mt352_reset[] = { 0x50, 0x80 };
+        static u8 mt352_mclk_ratio[] = { 0x8b, 0x00 };
+
+        static u8 mt352_agc_cfg[] = { 0x68, 0xa0 };
+        static u8 mt352_adc_ctl_1_cfg[] = { 0x8E, 0xa0 };
+        static u8 mt352_acq_ctl[] = { 0x53, 0x50 };
+        static u8 mt352_agc_target[] = { 0x67, 0x20 };
+
+        static u8 mt352_rs_err_per[] = { 0x7c, 0x00, 0x01 };
+        static u8 mt352_snr_select[] = { 0x79, 0x00, 0x20 };
+
+        static u8 mt352_input_freq_1[] = { 0x56, 0x31, 0x05 };
+
+        static u8 mt352_scan_ctl[] = { 0x88, 0x0f };
+        static u8 mt352_capt_range[] = { 0x75, 0x32 };
+
+        mt352_write(fe, mt352_clock_config, sizeof(mt352_clock_config));
+        mt352_write(fe, mt352_reset, sizeof(mt352_reset));
+        msleep(1);
+        mt352_write(fe, mt352_mclk_ratio, sizeof(mt352_mclk_ratio));
+
+        mt352_write(fe, mt352_agc_cfg, sizeof(mt352_agc_cfg));
+        mt352_write(fe, mt352_adc_ctl_1_cfg, sizeof(mt352_adc_ctl_1_cfg));
+        mt352_write(fe, mt352_acq_ctl, sizeof(mt352_acq_ctl));
+        mt352_write(fe, mt352_agc_target, sizeof(mt352_agc_target));
+
+
+        mt352_write(fe, mt352_rs_err_per, sizeof(mt352_rs_err_per));
+        mt352_write(fe, mt352_snr_select, sizeof(mt352_snr_select));
+
+        mt352_write(fe, mt352_input_freq_1, sizeof(mt352_input_freq_1));
+
+        mt352_write(fe, mt352_scan_ctl, sizeof(mt352_scan_ctl));
+        mt352_write(fe, mt352_capt_range, sizeof(mt352_capt_range));
+
+        return 0;
+}
+
+static struct mt352_config digitv_mt352_config = {
+        .demod_address = 0x0, /* ignored by the digitv anyway */
+        .demod_init = digitv_mt352_demod_init,
+        .pll_set = NULL, /* TODO */
+};
+
+static struct nxt6000_config digitv_nxt6000_config = {
+        .demod_address = 0x0, /* ignored by the digitv anyway */
+        .clock_inversion = 0x0,
+
+        .pll_init = NULL,
+        .pll_set = NULL,
+};
+
+static int digitv_frontend_attach(struct dvb_usb_device *d)
+{
+        if ((d->fe = mt352_attach(&digitv_mt352_config, &d->i2c_adap)) == NULL)
+                return 0;
+        if ((d->fe = nxt6000_attach(&digitv_nxt6000_config, &d->i2c_adap)) == NULL) {
+
+                warn("nxt6000 support is not done yet, in fact you are one of the first "
+                                "person who wants to use this device in Linux. Please report to "
+                                "linux-dvb@linuxtv.org");
+
+                return 0;
+        }
+        return -EIO;
+}
+
+static struct dvb_usb_rc_key digitv_rc_keys[] = {
+        { 0x00, 0x16, KEY_POWER }, /* dummy key */
+};
+
+/* TODO is it really the NEC protocol ? */
+int digitv_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
+{
+        u8 key[5];
+
+        digitv_ctrl_msg(d,USB_READ_REMOTE,0,NULL,0,&key[1],4);
+        /* TODO state, maybe it is VV ? */
+        if (key[1] != 0)
+                key[0] = 0x01; /* if something is inside the buffer, simulate key press */
+
+        /* call the universal NEC remote processor, to find out the key's state and event */
+        dvb_usb_nec_rc_key_to_event(d,key,event,state);
+        if (key[0] != 0)
+                deb_rc("key: %x %x %x %x %x\n",key[0],key[1],key[2],key[3],key[4]);
+        return 0;
+}
+
+
+/* DVB USB Driver stuff */
+static struct dvb_usb_properties digitv_properties;
+
+static int digitv_probe(struct usb_interface *intf,
+                const struct usb_device_id *id)
+{
+        return dvb_usb_device_init(intf,&digitv_properties,THIS_MODULE);
+}
+
+static struct usb_device_id digitv_table [] = {
+                { USB_DEVICE(USB_VID_ANCHOR, USB_PID_NEBULA_DIGITV) },
+                { }             /* Terminating entry */
+};
+MODULE_DEVICE_TABLE (usb, digitv_table);
+
+static struct dvb_usb_properties digitv_properties = {
+        .caps = DVB_USB_IS_AN_I2C_ADAPTER,
+
+        .usb_ctrl = CYPRESS_FX2,
+        .firmware = "dvb-usb-digitv-01.fw",
+
+        .size_of_priv     = 0,
+
+        .streaming_ctrl   = NULL,
+        .pid_filter       = NULL,
+        .pid_filter_ctrl  = NULL,
+        .power_ctrl       = NULL,
+        .frontend_attach  = digitv_frontend_attach,
+        .tuner_attach     = NULL, // digitv_tuner_attach,
+        .read_mac_address = NULL,
+
+        .rc_interval      = 1000,
+        .rc_key_map       = digitv_rc_keys,
+        .rc_key_map_size  = ARRAY_SIZE(digitv_rc_keys),
+        .rc_query         = digitv_rc_query,
+
+        .identify_state   = digitv_identify_state,
+
+        .i2c_algo         = &digitv_i2c_algo,
+
+        .generic_bulk_ctrl_endpoint = 0x01,
+        /* parameter for the MPEG2-data transfer */
+        .urb = {
+                .type = DVB_USB_BULK,
+                .count = 7,
+                .endpoint = 0x02,
+                .u = {
+                        .bulk = {
+                                .buffersize = 4096,
+                        }
+                }
+        },
+
+        .num_device_descs = 2,
+        .devices = {
+                {   "Nebula Electronics uDigiTV DVB-T USB2.0)",
+                        { &digitv_table[0], NULL },
+                        { NULL },
+                },
+        }
+};
+
+static struct usb_driver digitv_driver = {
+        .owner          = THIS_MODULE,
+        .name           = "Nebula Electronics uDigiTV DVB-T USB2.0 device",
+        .probe          = digitv_probe,
+        .disconnect = dvb_usb_device_exit,
+        .id_table       = digitv_table,
+};
+
+/* module stuff */
+static int __init digitv_module_init(void)
+{
+        int result;
+        if ((result = usb_register(&digitv_driver))) {
+                err("usb_register failed. Error number %d",result);
+                return result;
+        }
+
+        return 0;
+}
+
+static void __exit digitv_module_exit(void)
+{
+        /* deregister this driver from the USB subsystem */
+        usb_deregister(&digitv_driver);
+}
+
+module_init (digitv_module_init);
+module_exit (digitv_module_exit);
+
+MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
+MODULE_DESCRIPTION("Driver for Nebula Electronics uDigiTV DVB-T USB2.0");
+MODULE_VERSION("1.0-alpha");
+MODULE_LICENSE("GPL");