V4L/DVB (10954): Add cx231xx USB driver

Signed-off-by: Srinivasa Deevi <srinivasa.deevi@conexant.com>
[mchehab@redhat.com: Remove the Kconfig changes, to avoid git breakages]
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 565 insertions, 0 deletions

diff --git a/drivers/media/video/cx231xx/cx231xx-dvb.c b/drivers/media/video/cx231xx/cx231xx-dvb.c
new file mode 100644
index 00000000000..46bdcecb405
--- /dev/null
+++ b/drivers/media/video/cx231xx/cx231xx-dvb.c
@@ -0,0 +1,565 @@
+/*
+ DVB device driver for cx231xx
+
+ Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
+        Based on em28xx driver
+
+ 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; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/usb.h>
+
+#include "cx231xx.h"
+#include <media/v4l2-common.h>
+#include <media/videobuf-vmalloc.h>
+
+#include "xc5000.h"
+#include "dvb_dummy_fe.h"
+
+
+MODULE_DESCRIPTION("driver for cx231xx based DVB cards");
+MODULE_AUTHOR("Srinivasa Deevi <srinivasa.deevi@conexant.com>");
+MODULE_LICENSE("GPL");
+
+static unsigned int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
+
+DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
+
+#define dprintk(level, fmt, arg...) do {                        \
+if (debug >= level)                                             \
+        printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg); \
+} while (0)
+
+#define CX231XX_DVB_NUM_BUFS 5
+#define CX231XX_DVB_MAX_PACKETSIZE 564
+#define CX231XX_DVB_MAX_PACKETS 64
+
+struct cx231xx_dvb {
+        struct dvb_frontend        *frontend;
+
+        /* feed count management */
+        struct mutex               lock;
+        int                        nfeeds;
+
+        /* general boilerplate stuff */
+        struct dvb_adapter         adapter;
+        struct dvb_demux           demux;
+        struct dmxdev              dmxdev;
+        struct dmx_frontend        fe_hw;
+        struct dmx_frontend        fe_mem;
+        struct dvb_net             net;
+};
+
+
+static inline void print_err_status(struct cx231xx *dev,
+                                     int packet, int status)
+{
+        char *errmsg = "Unknown";
+
+        switch (status) {
+        case -ENOENT:
+                errmsg = "unlinked synchronuously";
+                break;
+        case -ECONNRESET:
+                errmsg = "unlinked asynchronuously";
+                break;
+        case -ENOSR:
+                errmsg = "Buffer error (overrun)";
+                break;
+        case -EPIPE:
+                errmsg = "Stalled (device not responding)";
+                break;
+        case -EOVERFLOW:
+                errmsg = "Babble (bad cable?)";
+                break;
+        case -EPROTO:
+                errmsg = "Bit-stuff error (bad cable?)";
+                break;
+        case -EILSEQ:
+                errmsg = "CRC/Timeout (could be anything)";
+                break;
+        case -ETIME:
+                errmsg = "Device does not respond";
+                break;
+        }
+        if (packet < 0) {
+                dprintk(1, "URB status %d [%s].\n", status, errmsg);
+        } else {
+                dprintk(1, "URB packet %d, status %d [%s].\n",
+                        packet, status, errmsg);
+        }
+}
+
+static inline int dvb_isoc_copy(struct cx231xx *dev, struct urb *urb)
+{
+        int i;
+
+        if (!dev)
+                return 0;
+
+        if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
+                return 0;
+
+        if (urb->status < 0) {
+                print_err_status(dev, -1, urb->status);
+                if (urb->status == -ENOENT)
+                        return 0;
+        }
+
+        for (i = 0; i < urb->number_of_packets; i++) {
+                int status = urb->iso_frame_desc[i].status;
+
+                if (status < 0) {
+                        print_err_status(dev, i, status);
+                        if (urb->iso_frame_desc[i].status != -EPROTO)
+                                continue;
+                }
+
+                dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer +
+                                 urb->iso_frame_desc[i].offset,
+                                 urb->iso_frame_desc[i].actual_length);
+        }
+
+        return 0;
+}
+
+static int start_streaming(struct cx231xx_dvb *dvb)
+{
+        int rc;
+        struct cx231xx *dev = dvb->adapter.priv;
+
+        usb_set_interface(dev->udev, 0, 1);
+        rc = cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
+        if (rc < 0)
+                return rc;
+
+        return cx231xx_init_isoc(dev, CX231XX_DVB_MAX_PACKETS,
+                                CX231XX_DVB_NUM_BUFS, CX231XX_DVB_MAX_PACKETSIZE,
+                                dvb_isoc_copy);
+}
+
+static int stop_streaming(struct cx231xx_dvb *dvb)
+{
+        struct cx231xx *dev = dvb->adapter.priv;
+
+        cx231xx_uninit_isoc(dev);
+
+        cx231xx_set_mode(dev, CX231XX_SUSPEND);
+
+        return 0;
+}
+
+static int start_feed(struct dvb_demux_feed *feed)
+{
+        struct dvb_demux *demux  = feed->demux;
+        struct cx231xx_dvb *dvb = demux->priv;
+        int rc, ret;
+
+        if (!demux->dmx.frontend)
+                return -EINVAL;
+
+        mutex_lock(&dvb->lock);
+        dvb->nfeeds++;
+        rc = dvb->nfeeds;
+
+        if (dvb->nfeeds == 1) {
+                ret = start_streaming(dvb);
+                if (ret < 0)
+                        rc = ret;
+        }
+
+        mutex_unlock(&dvb->lock);
+        return rc;
+}
+
+static int stop_feed(struct dvb_demux_feed *feed)
+{
+        struct dvb_demux *demux  = feed->demux;
+        struct cx231xx_dvb *dvb = demux->priv;
+        int err = 0;
+
+        mutex_lock(&dvb->lock);
+        dvb->nfeeds--;
+
+        if (0 == dvb->nfeeds)
+                err = stop_streaming(dvb);
+
+        mutex_unlock(&dvb->lock);
+        return err;
+}
+
+
+
+/* ------------------------------------------------------------------ */
+static int cx231xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
+{
+        struct cx231xx *dev = fe->dvb->priv;
+
+        if (acquire)
+                return cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
+        else
+                return cx231xx_set_mode(dev, CX231XX_SUSPEND);
+}
+
+/* ------------------------------------------------------------------ */
+
+
+static struct xc5000_config cnxt_rde250_tunerconfig = {
+        .i2c_address      = 0x61,
+        .if_khz           = 5380,
+};
+
+
+/* ------------------------------------------------------------------ */
+#if 0
+static int attach_xc5000(u8 addr, struct cx231xx *dev)
+{
+
+        struct dvb_frontend *fe;
+        struct xc5000_config cfg;
+
+        memset(&cfg, 0, sizeof(cfg));
+        cfg.i2c_adap  = &dev->i2c_bus[1].i2c_adap;
+        cfg.i2c_addr  = addr;
+
+        if (!dev->dvb->frontend) {
+                printk(KERN_ERR "%s/2: dvb frontend not attached. "
+                                "Can't attach xc5000\n",
+                       dev->name);
+                return -EINVAL;
+        }
+
+        fe = dvb_attach(xc5000_attach, dev->dvb->frontend, &cfg);
+        if (!fe) {
+                printk(KERN_ERR "%s/2: xc5000 attach failed\n", dev->name);
+                dvb_frontend_detach(dev->dvb->frontend);
+                dev->dvb->frontend = NULL;
+                return -EINVAL;
+        }
+
+        printk(KERN_INFO "%s/2: xc5000 attached\n", dev->name);
+
+        return 0;
+}
+#endif
+
+int cx231xx_set_analog_freq(struct cx231xx *dev, u32 freq )
+{
+        int status = 0;
+
+        if( (dev->dvb != NULL) && (dev->dvb->frontend != NULL) ){
+
+                        struct dvb_tuner_ops *dops = &dev->dvb->frontend->ops.tuner_ops;
+
+                    if(dops->set_analog_params != NULL) {
+                                 struct analog_parameters params;
+
+                                 params.frequency = freq;
+                                 params.std = dev->norm;
+                                 params.mode = 0 ; /* 0- Air; 1 - cable */
+                                 /*params.audmode = ;       */
+
+                                 /* Set the analog parameters to set the frequency */
+                                 cx231xx_info("Setting Frequency for XC5000\n");
+                                 dops->set_analog_params(dev->dvb->frontend, &params);
+                        }
+
+                }
+
+        return status;
+}
+
+int cx231xx_reset_analog_tuner(struct cx231xx *dev)
+{
+    int status = 0;
+
+        if( (dev->dvb != NULL) && (dev->dvb->frontend != NULL) ){
+
+                        struct dvb_tuner_ops *dops = &dev->dvb->frontend->ops.tuner_ops;
+
+                    if(dops->init != NULL && !dev->xc_fw_load_done) {
+
+                                 cx231xx_info("Reloading firmware for XC5000\n");
+                                 status = dops->init(dev->dvb->frontend);
+                 if(status == 0 ) {
+                    dev->xc_fw_load_done = 1;
+                    cx231xx_info("XC5000 firmware download completed\n");
+                 } else {
+                     dev->xc_fw_load_done = 0;
+                     cx231xx_info("XC5000 firmware download failed !!!\n");
+                 }
+                        }
+
+                }
+
+        return status;
+}
+
+
+/* ------------------------------------------------------------------ */
+
+static int register_dvb(struct cx231xx_dvb *dvb,
+                 struct module *module,
+                 struct cx231xx *dev,
+                 struct device *device)
+{
+        int result;
+
+        mutex_init(&dvb->lock);
+
+        /* register adapter */
+        result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
+                                      adapter_nr);
+        if (result < 0) {
+                printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
+                       dev->name, result);
+                goto fail_adapter;
+        }
+
+        /* Ensure all frontends negotiate bus access */
+        dvb->frontend->ops.ts_bus_ctrl = cx231xx_dvb_bus_ctrl;
+
+        dvb->adapter.priv = dev;
+
+        /* register frontend */
+        result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
+        if (result < 0) {
+                printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
+                       dev->name, result);
+                goto fail_frontend;
+        }
+
+        /* register demux stuff */
+        dvb->demux.dmx.capabilities =
+                DMX_TS_FILTERING | DMX_SECTION_FILTERING |
+                DMX_MEMORY_BASED_FILTERING;
+        dvb->demux.priv       = dvb;
+        dvb->demux.filternum  = 256;
+        dvb->demux.feednum    = 256;
+        dvb->demux.start_feed = start_feed;
+        dvb->demux.stop_feed  = stop_feed;
+
+        result = dvb_dmx_init(&dvb->demux);
+        if (result < 0) {
+                printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
+                       dev->name, result);
+                goto fail_dmx;
+        }
+
+        dvb->dmxdev.filternum    = 256;
+        dvb->dmxdev.demux        = &dvb->demux.dmx;
+        dvb->dmxdev.capabilities = 0;
+        result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
+        if (result < 0) {
+                printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
+                       dev->name, result);
+                goto fail_dmxdev;
+        }
+
+        dvb->fe_hw.source = DMX_FRONTEND_0;
+        result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
+        if (result < 0) {
+                printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
+                       dev->name, result);
+                goto fail_fe_hw;
+        }
+
+        dvb->fe_mem.source = DMX_MEMORY_FE;
+        result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
+        if (result < 0) {
+                printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
+                       dev->name, result);
+                goto fail_fe_mem;
+        }
+
+        result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
+        if (result < 0) {
+                printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
+                       dev->name, result);
+                goto fail_fe_conn;
+        }
+
+        /* register network adapter */
+        dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
+        return 0;
+
+fail_fe_conn:
+        dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
+fail_fe_mem:
+        dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
+fail_fe_hw:
+        dvb_dmxdev_release(&dvb->dmxdev);
+fail_dmxdev:
+        dvb_dmx_release(&dvb->demux);
+fail_dmx:
+        dvb_unregister_frontend(dvb->frontend);
+fail_frontend:
+        dvb_frontend_detach(dvb->frontend);
+        dvb_unregister_adapter(&dvb->adapter);
+fail_adapter:
+        return result;
+}
+
+static void unregister_dvb(struct cx231xx_dvb *dvb)
+{
+        dvb_net_release(&dvb->net);
+        dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
+        dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
+        dvb_dmxdev_release(&dvb->dmxdev);
+        dvb_dmx_release(&dvb->demux);
+        dvb_unregister_frontend(dvb->frontend);
+        dvb_frontend_detach(dvb->frontend);
+        dvb_unregister_adapter(&dvb->adapter);
+}
+
+
+static int dvb_init(struct cx231xx *dev)
+{
+        int result = 0;
+        struct cx231xx_dvb *dvb;
+
+        if (!dev->board.has_dvb) {
+                /* This device does not support the extension */
+                return 0;
+        }
+
+        dvb = kzalloc(sizeof(struct cx231xx_dvb), GFP_KERNEL);
+
+        if (dvb == NULL) {
+                printk(KERN_INFO "cx231xx_dvb: memory allocation failed\n");
+                return -ENOMEM;
+        }
+        dev->dvb = dvb;
+        dev->cx231xx_set_analog_freq = cx231xx_set_analog_freq;
+    dev->cx231xx_reset_analog_tuner = cx231xx_reset_analog_tuner;
+
+        cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
+        /* init frontend */
+        switch (dev->model) {
+        case CX231XX_BOARD_CNXT_RDE_250:
+
+           /* dev->dvb->frontend = dvb_attach(s5h1411_attach,
+                                                        &dvico_s5h1411_config,
+                                                        &dev->i2c_bus[1].i2c_adap);*/
+            dev->dvb->frontend = dvb_attach(dvb_dummy_fe_ofdm_attach);
+
+            if(dev->dvb->frontend == NULL) {
+                printk(DRIVER_NAME ": Failed to attach dummy front end\n");
+                result = -EINVAL;
+                            goto out_free;
+            }
+
+            /* define general-purpose callback pointer */
+                dvb->frontend->callback = cx231xx_tuner_callback;
+
+            if(dvb_attach(xc5000_attach, dev->dvb->frontend,
+                                   &dev->i2c_bus[1].i2c_adap,
+                                   &cnxt_rde250_tunerconfig) < 0) {
+                            result = -EINVAL;
+                            goto out_free;
+                    }
+
+            break;
+       case CX231XX_BOARD_CNXT_RDU_250:
+
+           dev->dvb->frontend = dvb_attach(dvb_dummy_fe_ofdm_attach);
+
+            if(dev->dvb->frontend == NULL) {
+                printk(DRIVER_NAME ": Failed to attach dummy front end\n");
+                result = -EINVAL;
+                            goto out_free;
+            }
+
+            /* define general-purpose callback pointer */
+                dvb->frontend->callback = cx231xx_tuner_callback;
+
+           if(dvb_attach(xc5000_attach, dev->dvb->frontend,
+                                   &dev->i2c_bus[1].i2c_adap,
+                                   &cnxt_rde250_tunerconfig) < 0) {
+                            result = -EINVAL;
+                            goto out_free;
+                    }
+           break;
+
+        default:
+                printk(KERN_ERR "%s/2: The frontend of your DVB/ATSC card"
+                                " isn't supported yet\n",
+                       dev->name);
+                break;
+        }
+        if (NULL == dvb->frontend) {
+                printk(KERN_ERR
+                       "%s/2: frontend initialization failed\n",
+                       dev->name);
+                result = -EINVAL;
+                goto out_free;
+        }
+
+
+        /* register everything */
+        result = register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);
+
+        if (result < 0)
+                goto out_free;
+
+        cx231xx_set_mode(dev, CX231XX_SUSPEND);
+        printk(KERN_INFO "Successfully loaded cx231xx-dvb\n");
+        return 0;
+
+out_free:
+        cx231xx_set_mode(dev, CX231XX_SUSPEND);
+        kfree(dvb);
+        dev->dvb = NULL;
+        return result;
+}
+
+static int dvb_fini(struct cx231xx *dev)
+{
+        if (!dev->board.has_dvb) {
+                /* This device does not support the extension */
+                return 0;
+        }
+
+        if (dev->dvb) {
+                unregister_dvb(dev->dvb);
+                dev->dvb = NULL;
+        }
+
+        return 0;
+}
+
+static struct cx231xx_ops dvb_ops = {
+        .id   = CX231XX_DVB,
+        .name = "Cx231xx dvb Extension",
+        .init = dvb_init,
+        .fini = dvb_fini,
+};
+
+static int __init cx231xx_dvb_register(void)
+{
+        return cx231xx_register_extension(&dvb_ops);
+}
+
+static void __exit cx231xx_dvb_unregister(void)
+{
+        cx231xx_unregister_extension(&dvb_ops);
+}
+
+module_init(cx231xx_dvb_register);
+module_exit(cx231xx_dvb_unregister);
+