V4L/DVB (4029): [PATCH] Genpix 8PSK->USB driver (Take 2)

This is a patch which includes support for the GENPIX 8PSK->USB module.  The
board supports QPSK, BPSK and 8PSK decoding (though I don't think it will be
DVB-S2 compliant) With the following patch, the boad is equivalent to a budget
card (no CA Module)
The patch which adds 8psk suppot will follow, but is seperate, as it requires
DVB-S2 support
More info on the board can be found at www.genpix-electronics.com (and they
host the requisite firmwares there as well)
Signed off by: Alan Nisota <alannisota@gmail.com>

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 254 insertions, 0 deletions

diff --git a/drivers/media/dvb/dvb-usb/gp8psk.c b/drivers/media/dvb/dvb-usb/gp8psk.c
new file mode 100644
index 000000000000..d6771cbd262d
--- /dev/null
+++ b/drivers/media/dvb/dvb-usb/gp8psk.c
@@ -0,0 +1,254 @@
+/* DVB USB compliant Linux driver for the
+ *  - GENPIX 8pks/qpsk USB2.0 DVB-S module
+ *
+ * Copyright (C) 2006 Alan Nisota (alannisota@gmail.com)
+ *
+ * Thanks to GENPIX for the sample code used to implement this module.
+ *
+ * This module is based off the vp7045 and vp702x modules
+ *
+ *      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 "gp8psk.h"
+
+/* debug */
+static char bcm4500_firmware[] = "dvb-usb-gp8psk-02.fw";
+int dvb_usb_gp8psk_debug;
+module_param_named(debug,dvb_usb_gp8psk_debug, int, 0644);
+MODULE_PARM_DESC(debug, "set debugging level (1=info,xfer=2,rc=4 (or-able))." DVB_USB_DEBUG_STATUS);
+
+int gp8psk_usb_in_op(struct dvb_usb_device *d, u8 req, u16 value, u16 index, u8 *b, int blen)
+{
+        int ret = 0,try = 0;
+
+        if ((ret = mutex_lock_interruptible(&d->usb_mutex)))
+                return ret;
+
+        while (ret >= 0 && ret != blen && try < 3) {
+                ret = usb_control_msg(d->udev,
+                        usb_rcvctrlpipe(d->udev,0),
+                        req,
+                        USB_TYPE_VENDOR | USB_DIR_IN,
+                        value,index,b,blen,
+                        2000);
+                deb_info("reading number %d (ret: %d)\n",try,ret);
+                try++;
+        }
+
+        if (ret < 0 || ret != blen) {
+                warn("usb in operation failed.");
+                ret = -EIO;
+        } else
+                ret = 0;
+
+        deb_xfer("in: req. %x, val: %x, ind: %x, buffer: ",req,value,index);
+        debug_dump(b,blen,deb_xfer);
+
+        mutex_unlock(&d->usb_mutex);
+
+        return ret;
+}
+
+int gp8psk_usb_out_op(struct dvb_usb_device *d, u8 req, u16 value,
+                             u16 index, u8 *b, int blen)
+{
+        int ret;
+
+        deb_xfer("out: req. %x, val: %x, ind: %x, buffer: ",req,value,index);
+        debug_dump(b,blen,deb_xfer);
+
+        if ((ret = mutex_lock_interruptible(&d->usb_mutex)))
+                return ret;
+
+        if (usb_control_msg(d->udev,
+                        usb_sndctrlpipe(d->udev,0),
+                        req,
+                        USB_TYPE_VENDOR | USB_DIR_OUT,
+                        value,index,b,blen,
+                        2000) != blen) {
+                warn("usb out operation failed.");
+                ret = -EIO;
+        } else
+                ret = 0;
+        mutex_unlock(&d->usb_mutex);
+
+        return ret;
+}
+
+static int gp8psk_load_bcm4500fw(struct dvb_usb_device *d)
+{
+        int ret;
+        const struct firmware *fw = NULL;
+        u8 *ptr, *buf;
+        if ((ret = request_firmware(&fw, bcm4500_firmware,
+                                        &d->udev->dev)) != 0) {
+                err("did not find the bcm4500 firmware file. (%s) "
+                        "Please see linux/Documentation/dvb/ for more details on firmware-problems. (%d)",
+                        bcm4500_firmware,ret);
+                return ret;
+        }
+
+        if (gp8psk_usb_out_op(d, LOAD_BCM4500,1,0,NULL, 0)) {
+                release_firmware(fw);
+                return -EINVAL;
+        }
+
+        info("downloaidng bcm4500 firmware from file '%s'",bcm4500_firmware);
+
+        ptr = fw->data;
+        buf = (u8 *) kmalloc(512, GFP_KERNEL | GFP_DMA);
+
+        while (ptr[0] != 0xff) {
+                u16 buflen = ptr[0] + 4;
+                if (ptr + buflen >= fw->data + fw->size) {
+                        err("failed to load bcm4500 firmware.");
+                        release_firmware(fw);
+                        kfree(buf);
+                        return -EINVAL;
+                }
+                memcpy(buf, ptr, buflen);
+                if (dvb_usb_generic_write(d, buf, buflen)) {
+                        err("failed to load bcm4500 firmware.");
+                        release_firmware(fw);
+                        kfree(buf);
+                        return -EIO;
+                }
+                ptr += buflen;
+        }
+        release_firmware(fw);
+        kfree(buf);
+        return 0;
+}
+
+static int gp8psk_power_ctrl(struct dvb_usb_device *d, int onoff)
+{
+        u8 status, buf;
+        if (onoff) {
+                gp8psk_usb_in_op(d, GET_8PSK_CONFIG,0,0,&status,1);
+                if (! (status & 0x01))  /* started */
+                        if (gp8psk_usb_in_op(d, BOOT_8PSK, 1, 0, &buf, 1))
+                                return -EINVAL;
+
+                if (! (status & 0x02)) /* BCM4500 firmware loaded */
+                        if(gp8psk_load_bcm4500fw(d))
+                                return EINVAL;
+
+                if (! (status & 0x04)) /* LNB Power */
+                        if (gp8psk_usb_in_op(d, START_INTERSIL, 1, 0,
+                                        &buf, 1))
+                                return EINVAL;
+
+                /* Set DVB mode */
+                if(gp8psk_usb_out_op(d, SET_DVB_MODE, 1, 0, NULL, 0))
+                        return -EINVAL;
+                gp8psk_usb_in_op(d, GET_8PSK_CONFIG,0,0,&status,1);
+        } else {
+                /* Turn off LNB power */
+                if (gp8psk_usb_in_op(d, START_INTERSIL, 0, 0, &buf, 1))
+                        return EINVAL;
+                /* Turn off 8psk power */
+                if (gp8psk_usb_in_op(d, BOOT_8PSK, 0, 0, &buf, 1))
+                        return -EINVAL;
+
+        }
+        return 0;
+}
+
+
+static int gp8psk_streaming_ctrl(struct dvb_usb_device *d, int onoff)
+{
+        return gp8psk_usb_out_op(d, ARM_TRANSFER, onoff, 0 , NULL, 0);
+}
+
+static int gp8psk_frontend_attach(struct dvb_usb_device *d)
+{
+        d->fe = gp8psk_fe_attach(d);
+
+        return 0;
+}
+
+static struct dvb_usb_properties gp8psk_properties;
+
+static int gp8psk_usb_probe(struct usb_interface *intf,
+                const struct usb_device_id *id)
+{
+        return dvb_usb_device_init(intf,&gp8psk_properties,THIS_MODULE,NULL);
+}
+
+static struct usb_device_id gp8psk_usb_table [] = {
+            { USB_DEVICE(USB_VID_GENPIX, USB_PID_GENPIX_8PSK_COLD) },
+            { USB_DEVICE(USB_VID_GENPIX, USB_PID_GENPIX_8PSK_WARM) },
+            { 0 },
+};
+MODULE_DEVICE_TABLE(usb, gp8psk_usb_table);
+
+static struct dvb_usb_properties gp8psk_properties = {
+        .caps = 0,
+
+        .usb_ctrl = CYPRESS_FX2,
+        .firmware = "dvb-usb-gp8psk-01.fw",
+
+        .streaming_ctrl   = gp8psk_streaming_ctrl,
+        .power_ctrl       = gp8psk_power_ctrl,
+        .frontend_attach  = gp8psk_frontend_attach,
+
+        .generic_bulk_ctrl_endpoint = 0x01,
+        /* parameter for the MPEG2-data transfer */
+        .urb = {
+                .type = DVB_USB_BULK,
+                .count = 7,
+                .endpoint = 0x82,
+                .u = {
+                        .bulk = {
+                                .buffersize = 8192,
+                        }
+                }
+        },
+
+        .num_device_descs = 1,
+        .devices = {
+                { .name = "Genpix 8PSK-USB DVB-S USB2.0 receiver",
+                  .cold_ids = { &gp8psk_usb_table[0], NULL },
+                  .warm_ids = { &gp8psk_usb_table[1], NULL },
+                },
+                { 0 },
+        }
+};
+
+/* usb specific object needed to register this driver with the usb subsystem */
+static struct usb_driver gp8psk_usb_driver = {
+        .name           = "dvb_usb_gp8psk",
+        .probe          = gp8psk_usb_probe,
+        .disconnect = dvb_usb_device_exit,
+        .id_table       = gp8psk_usb_table,
+};
+
+/* module stuff */
+static int __init gp8psk_usb_module_init(void)
+{
+        int result;
+        if ((result = usb_register(&gp8psk_usb_driver))) {
+                err("usb_register failed. (%d)",result);
+                return result;
+        }
+
+        return 0;
+}
+
+static void __exit gp8psk_usb_module_exit(void)
+{
+        /* deregister this driver from the USB subsystem */
+        usb_deregister(&gp8psk_usb_driver);
+}
+
+module_init(gp8psk_usb_module_init);
+module_exit(gp8psk_usb_module_exit);
+
+MODULE_AUTHOR("Alan Nisota <alannisota@gamil.com>");
+MODULE_DESCRIPTION("Driver for Genpix 8psk-USB DVB-S USB2.0");
+MODULE_VERSION("1.0");
+MODULE_LICENSE("GPL");