dvb-usb: initial support for MSI Mega Sky 580 DVB-T based on GL861

From: Carl Lundqvist <comabug@gmail.com>

This patch adds support for MSI Mega Sky 580 / GL861 DVB-T USB2.0

Notes:

Except for the 2 lines added to zl10353.c, zl10353_reset_attach needs
to be changed. If I read the code correctly setting parallel_ts will
take care of the 3rd byte, but the 2nd byte needs to be 0x0b instead
of 0x03 too. I guess these changes needs to be done only for this
device, not sure how to do that.

The zl10353 changes have been split apart from this patch, into the next
patch, soon to follow.

Signed-off-by: Carl Lundqvist <comabug@gmail.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>

5 files changed, 266 insertions, 0 deletions

diff --git a/linux/drivers/media/dvb/dvb-usb/Kconfig b/linux/drivers/media/dvb/dvb-usb/Kconfig
index 861a02939..c0a899a04 100644
--- a/linux/drivers/media/dvb/dvb-usb/Kconfig
+++ b/linux/drivers/media/dvb/dvb-usb/Kconfig
@@ -120,6 +120,14 @@ config DVB_USB_M920X
 	  "DTV USB MINI" (in cold state) are supported.
 	  Firmware required.
 
+config DVB_USB_GL861
+	tristate "Genesys Logic GL861 USB2.0 support"
+	depends on DVB_USB
+	select DVB_ZL10353
+	help
+	  Say Y here to support the MSI Megasky 580 (55801) DVB-T USB2.0
+	  receiver with USB ID 0db0:5581.
+
 config DVB_USB_DIGITV
 	tristate "Nebula Electronics uDigiTV DVB-T USB2.0 support"
 	depends on DVB_USB
diff --git a/linux/drivers/media/dvb/dvb-usb/Makefile b/linux/drivers/media/dvb/dvb-usb/Makefile
index 815e27898..53b63c584 100644
--- a/linux/drivers/media/dvb/dvb-usb/Makefile
+++ b/linux/drivers/media/dvb/dvb-usb/Makefile
@@ -33,6 +33,9 @@ obj-$(CONFIG_DVB_USB_UMT_010) += dvb-usb-dibusb-common.o dvb-usb-umt-010.o
 dvb-usb-m920x-objs = m920x.o
 obj-$(CONFIG_DVB_USB_M920X) += dvb-usb-m920x.o
 
+dvb-usb-gl861-objs = gl861.o
+obj-$(CONFIG_DVB_USB_GL861) += dvb-usb-gl861.o
+
 dvb-usb-digitv-objs = digitv.o
 obj-$(CONFIG_DVB_USB_DIGITV) += dvb-usb-digitv.o
 
diff --git a/linux/drivers/media/dvb/dvb-usb/dvb-usb-ids.h b/linux/drivers/media/dvb/dvb-usb/dvb-usb-ids.h
index 713ec5a82..0414ee354 100644
--- a/linux/drivers/media/dvb/dvb-usb/dvb-usb-ids.h
+++ b/linux/drivers/media/dvb/dvb-usb/dvb-usb-ids.h
@@ -121,6 +121,7 @@
 #define USB_PID_DIGITALNOW_BLUEBIRD_DUAL_1_WARM		0xdb55
 #define USB_PID_MEDION_MD95700				0x0932
 #define USB_PID_MSI_MEGASKY580				0x5580
+#define USB_PID_MSI_MEGASKY55801			0x5581
 #define USB_PID_KYE_DVB_T_COLD				0x701e
 #define USB_PID_KYE_DVB_T_WARM				0x701f
 #define USB_PID_PCTV_200E				0x020e
diff --git a/linux/drivers/media/dvb/dvb-usb/gl861.c b/linux/drivers/media/dvb/dvb-usb/gl861.c
new file mode 100644
index 000000000..52c8d082e
--- /dev/null
+++ b/linux/drivers/media/dvb/dvb-usb/gl861.c
@@ -0,0 +1,238 @@
+/* DVB USB compliant linux driver for GL861 USB2.0 devices.
+ *
+ *	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 "gl861.h"
+
+#include "zl10353.h"
+#include "qt1010.h"
+
+/* debug */
+int dvb_usb_gl861_debug;
+module_param_named(debug,dvb_usb_gl861_debug, int, 0644);
+MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);
+
+static int gl861_i2c_msg(struct dvb_usb_device *d, u8 addr,
+					u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
+{
+	u16 index;
+	u16 value = addr << 8;
+	int wo = (rbuf == NULL || rlen == 0); /* write-only */
+	u8 req, type;
+
+	if (wo) {
+		req = GL861_REQ_I2C_WRITE;
+		type = GL861_WRITE;
+	} else { /* rw */
+		req = GL861_REQ_I2C_READ;
+		type = GL861_READ;
+	}
+
+	switch (wlen) {
+		case 1:
+			index = wbuf[0];
+			break;
+		case 2:
+			index = wbuf[0];
+			value = value + wbuf[1];
+			break;
+		default:
+			warn("wlen = %x, aborting.", wlen);
+			return -EINVAL;
+	}
+
+	return usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), req, type,
+					value, index, rbuf, rlen, 2000);
+}
+
+/* I2C */
+static int gl861_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
+								int num)
+{
+	struct dvb_usb_device *d = i2c_get_adapdata(adap);
+	int i;
+
+	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
+		return -EAGAIN;
+
+	if (num > 2)
+		return -EINVAL;
+
+	for (i = 0; i < num; i++) {
+		/* write/read request */
+		if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
+			if (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
+				msg[i].len, msg[i+1].buf, msg[i+1].len) < 0)
+				break;
+			i++;
+		} else
+			if (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
+						msg[i].len, NULL, 0) < 0)
+				break;
+	}
+
+	mutex_unlock(&d->i2c_mutex);
+	return i;
+}
+
+static u32 gl861_i2c_func(struct i2c_adapter *adapter)
+{
+	return I2C_FUNC_I2C;
+}
+
+static struct i2c_algorithm gl861_i2c_algo = {
+	.master_xfer   = gl861_i2c_xfer,
+	.functionality = gl861_i2c_func,
+};
+
+/* Callbacks for DVB USB */
+static int gl861_identify_state(struct usb_device *udev,
+				struct dvb_usb_device_properties *props,
+				struct dvb_usb_device_description **desc,
+				int *cold)
+{
+	*cold = 0;
+
+	return 0;
+}
+
+static struct zl10353_config gl861_zl10353_config = {
+	.demod_address = 0x1e,
+	.no_tuner = 1,
+/*
+	.parallel_ts = 1,
+*/
+};
+
+static int gl861_frontend_attach(struct dvb_usb_adapter *adap)
+{
+	if ((adap->fe = dvb_attach(zl10353_attach, &gl861_zl10353_config,
+					&adap->dev->i2c_adap)) != NULL) {
+		return 0;
+	}
+
+	return -EIO;
+}
+
+static int gl861_tuner_attach(struct dvb_usb_adapter *adap)
+{
+	adap->pll_addr = 0xc4;
+	adap->pll_desc = NULL;
+	adap->fe->ops.tuner_ops.set_params = qt1010_set_params;
+
+	return 0;
+}
+
+/* DVB USB Driver stuff */
+static struct dvb_usb_device_properties gl861_properties;
+
+static int gl861_probe(struct usb_interface *intf,
+						const struct usb_device_id *id)
+{
+	struct dvb_usb_device *d;
+	struct usb_host_interface *alt;
+	int ret;
+
+	if (intf->num_altsetting < 2)
+		return -ENODEV;
+
+	if ((ret = dvb_usb_device_init(intf, &gl861_properties, THIS_MODULE,
+								&d)) == 0) {
+		alt = usb_altnum_to_altsetting(intf, 0);
+
+		if (alt == NULL) {
+			deb_rc("not alt found!\n");
+			return -ENODEV;
+		}
+
+		ret = usb_set_interface(d->udev, alt->desc.bInterfaceNumber,
+						alt->desc.bAlternateSetting);
+	}
+
+	return ret;
+}
+
+static struct usb_device_id gl861_table [] = {
+		{ USB_DEVICE(USB_VID_MSI, USB_PID_MSI_MEGASKY55801) },
+		{}		/* Terminating entry */
+};
+MODULE_DEVICE_TABLE (usb, gl861_table);
+
+static struct dvb_usb_device_properties gl861_properties = {
+	.usb_ctrl = DEVICE_SPECIFIC,
+
+	.size_of_priv     = 0,
+
+	.identify_state   = gl861_identify_state,
+	.num_adapters = 1,
+	.adapter = {{
+		.caps = DVB_USB_IS_AN_I2C_ADAPTER,
+
+		.frontend_attach  = gl861_frontend_attach,
+		.tuner_attach     = gl861_tuner_attach,
+
+		.stream = {
+			.type = USB_BULK,
+			.count = 7,
+			.endpoint = 0x81,
+			.u = {
+				.bulk = {
+					.buffersize = 512,
+				}
+			}
+		},
+	}},
+	.i2c_algo         = &gl861_i2c_algo,
+
+	.generic_bulk_ctrl_endpoint = 0x01,
+
+	.num_device_descs = 1,
+	.devices = {
+		{   "MSI Mega Sky 55801 DVB-T USB2.0",
+			{ &gl861_table[0], NULL },
+			{ NULL },
+		},
+		{ NULL },
+	}
+};
+
+static struct usb_driver gl861_driver = {
+#if LINUX_VERSION_CODE <=  KERNEL_VERSION(2,6,15)
+	.owner		= THIS_MODULE,
+#endif
+	.name		= "gl861",
+	.probe		= gl861_probe,
+	.disconnect	= dvb_usb_device_exit,
+	.id_table	= gl861_table,
+};
+
+/* module stuff */
+static int __init gl861_module_init(void)
+{
+	int ret;
+
+	if ((ret = usb_register(&gl861_driver))) {
+		err("usb_register failed. Error number %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void __exit gl861_module_exit(void)
+{
+	/* deregister this driver from the USB subsystem */
+	usb_deregister(&gl861_driver);
+}
+
+module_init (gl861_module_init);
+module_exit (gl861_module_exit);
+
+MODULE_AUTHOR("comabug@gmail.com");
+MODULE_DESCRIPTION("Driver MSI Mega Sky 580 DVB-T USB2.0 / GL861");
+MODULE_VERSION("1.0");
+MODULE_LICENSE("GPL");
diff --git a/linux/drivers/media/dvb/dvb-usb/gl861.h b/linux/drivers/media/dvb/dvb-usb/gl861.h
new file mode 100644
index 000000000..df97fcf50
--- /dev/null
+++ b/linux/drivers/media/dvb/dvb-usb/gl861.h
@@ -0,0 +1,16 @@
+#ifndef _DVB_USB_GL861_H_
+#define _DVB_USB_GL861_H_
+
+#define DVB_USB_LOG_PREFIX "gl861"
+#include "dvb-usb.h"
+
+extern int dvb_usb_gl861_debug;
+#define deb_rc(args...)   dprintk(dvb_usb_gl861_debug,0x01,args)
+
+#define GL861_WRITE		0x40
+#define GL861_READ		0xc0
+
+#define GL861_REQ_I2C_WRITE	0x01
+#define GL861_REQ_I2C_READ	0x02
+
+#endif