V4L/DVB (4647): Added module for DiB0700 based devices

Added module for DiB0700 based USB devices. This module is preliminary and
untested (because of a lack of test devices) but should work.
Further commits will be necessary to make it work properly.

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

1 files changed, 264 insertions, 0 deletions

diff --git a/drivers/media/dvb/dvb-usb/dib0700_core.c b/drivers/media/dvb/dvb-usb/dib0700_core.c
new file mode 100644
index 000000000000..1f444a4411a5
--- /dev/null
+++ b/drivers/media/dvb/dvb-usb/dib0700_core.c
@@ -0,0 +1,264 @@
+/* Linux driver for devices based on the DiBcom DiB0700 USB bridge
+ *
+ *	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.
+ *
+ *  Copyright (C) 2005-6 DiBcom, SA
+ */
+#include "dib0700.h"
+
+/* debug */
+int dvb_usb_dib0700_debug;
+module_param_named(debug,dvb_usb_dib0700_debug, int, 0644);
+MODULE_PARM_DESC(debug, "set debugging level (1=info,2=fw,4=fwdata,8=data (or-able))." DVB_USB_DEBUG_STATUS);
+
+/* expecting rx buffer: request data[0] data[1] ... data[2] */
+static int dib0700_ctrl_wr(struct dvb_usb_device *d, u8 *tx, u8 txlen)
+{
+	int status;
+
+	deb_data(">>> ");
+	debug_dump(tx,txlen,deb_data);
+
+	status = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev,0),
+		tx[0], USB_TYPE_VENDOR | USB_DIR_OUT, 0, 0, tx, txlen,
+		USB_CTRL_GET_TIMEOUT);
+
+	if (status != txlen)
+		err("ep 0 write error (status = %d, len: %d)",status,txlen);
+
+	return status < 0 ? status : 0;
+}
+
+/* expecting tx buffer: request data[0] ... data[n] (n <= 4) */
+static int dib0700_ctrl_rd(struct dvb_usb_device *d, u8 *tx, u8 txlen, u8 *rx, u8 rxlen)
+{
+	u16 index, value;
+	int status;
+
+	if (txlen < 2) {
+		err("tx buffer length is smaller than 2. Makes no sense.");
+		return -EINVAL;
+	}
+	if (txlen > 4) {
+		err("tx buffer length is larger than 4. Not supported.");
+		return -EINVAL;
+	}
+
+	deb_data(">>> ");
+	debug_dump(tx,txlen,deb_data);
+
+	value = ((txlen - 2) << 8) | tx[1];
+	index = 0;
+	if (txlen > 2)
+		index |= (tx[2] << 8);
+	if (txlen > 3)
+		index |= tx[3];
+
+	/* think about swapping here */
+	value = le16_to_cpu(value);
+	index = le16_to_cpu(index);
+
+	status = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev,0), tx[0],
+			USB_TYPE_VENDOR | USB_DIR_IN, value, index, rx, rxlen,
+			USB_CTRL_GET_TIMEOUT);
+
+	if (status < 0)
+		err("ep 0 read error (status = %d)",status);
+
+	deb_data("<<< ");
+	debug_dump(rx,rxlen,deb_data);
+
+	return status; /* length in case of success */
+}
+
+int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_dir, u8 gpio_val)
+{
+	u8 buf[3] = { REQUEST_SET_GPIO, gpio, ((gpio_dir & 0x01) << 7) | ((gpio_val & 0x01) << 6) };
+	return dib0700_ctrl_wr(d,buf,3);
+}
+
+/*
+ * I2C master xfer function
+ */
+static int dib0700_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg *msg,int num)
+{
+	struct dvb_usb_device *d = i2c_get_adapdata(adap);
+	int i,len;
+	u8 buf[255];
+
+	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
+		return -EAGAIN;
+
+	for (i = 0; i < num; i++) {
+		/* fill in the address */
+		buf[1] = (msg[i].addr << 1);
+		/* fill the buffer */
+		memcpy(&buf[2], msg[i].buf, msg[i].len);
+
+		/* write/read request */
+		if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
+			buf[0] = REQUEST_I2C_READ;
+			buf[1] |= 1;
+
+			/* special thing in the current firmware: when length is zero the read-failed */
+			if ((len = dib0700_ctrl_rd(d, buf, msg[i].len + 2, msg[i+1].buf, msg[i+1].len)) <= 0)
+				break;
+
+			msg[i+1].len = len;
+
+			i++;
+		} else {
+			buf[0] = REQUEST_I2C_WRITE;
+			if (dib0700_ctrl_wr(d, buf, msg[i].len + 2) < 0)
+				break;
+		}
+	}
+
+	mutex_unlock(&d->i2c_mutex);
+	return i;
+}
+
+static u32 dib0700_i2c_func(struct i2c_adapter *adapter)
+{
+	return I2C_FUNC_I2C;
+}
+
+struct i2c_algorithm dib0700_i2c_algo = {
+	.master_xfer   = dib0700_i2c_xfer,
+	.functionality = dib0700_i2c_func,
+};
+
+static int dib0700_jumpram(struct usb_device *udev, u32 address)
+{
+	int ret, actlen;
+	u8 buf[8] = { REQUEST_JUMPRAM, 0, 0, 0,
+		(address >> 24) & 0xff,
+		(address >> 16) & 0xff,
+		(address >> 8)  & 0xff,
+		 address        & 0xff };
+
+	if ((ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, 0x01),buf,8,&actlen,1000)) < 0) {
+		deb_fw("jumpram to 0x%x failed\n",address);
+		return ret;
+	}
+	if (actlen != 8) {
+		deb_fw("jumpram to 0x%x failed\n",address);
+		return -EIO;
+	}
+	return 0;
+}
+
+int dib0700_download_firmware(struct usb_device *udev, const struct firmware *fw)
+{
+	struct hexline hx;
+	int pos = 0, ret, act_len;
+
+	u8 buf[260];
+
+	while ((ret = dvb_usb_get_hexline(fw, &hx, &pos)) > 0) {
+		deb_fwdata("writing to address 0x%04x (buffer: 0x%02x %02x)\n",hx.addr, hx.len, hx.chk);
+
+		buf[0] = hx.len;
+		buf[1] = hx.addr >> 8;
+		buf[2] = hx.addr & 0xff;
+		buf[3] = hx.type;
+		memcpy(&buf[4],hx.data,hx.len);
+		buf[4+hx.len] = hx.chk;
+
+		ret = usb_bulk_msg(udev,
+			usb_sndbulkpipe(udev, 0x01),
+			buf,
+			hx.len + 5,
+			&act_len,
+			1000);
+
+		if (ret < 0) {
+			err("firmware download failed at %d with %d",pos,ret);
+			return ret;
+		}
+	}
+
+	if (ret == 0) {
+		/* start the firmware */
+		if ((ret = dib0700_jumpram(udev,0x70000000)) == 0)
+			info("firmware started successfully.");
+	} else
+		ret = -EIO;
+
+	return ret;
+}
+
+int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
+{
+	struct dib0700_state *st = adap->dev->priv;
+	u8 b[4];
+
+	b[0] = REQUEST_ENABLE_VIDEO;
+	b[1] = 0x00;
+	b[2] = (0x01 << 4); /* Master mode */
+	b[3] = 0x00;
+
+	deb_info("modifying (%d) streaming state for %d\n", onoff, adap->id);
+
+	if (onoff)
+		st->channel_state |=   1 << adap->id;
+	else
+		st->channel_state &= ~(1 << adap->id);
+
+	b[2] |= st->channel_state;
+
+	if (st->channel_state) /* if at least one channel is active */
+		b[1] = (0x01 << 4) | 0x00;
+
+	deb_info("data for streaming: %x %x\n",b[1],b[2]);
+
+	return dib0700_ctrl_wr(adap->dev, b, 4);
+}
+
+static int dib0700_probe(struct usb_interface *intf,
+		const struct usb_device_id *id)
+{
+	int i;
+
+	for (i = 0; i < dib0700_device_count; i++)
+		if (dvb_usb_device_init(intf, &dib0700_devices[i], THIS_MODULE, NULL) == 0)
+			return 0;
+
+	return -ENODEV;
+}
+
+static struct usb_driver dib0700_driver = {
+	.name       = "dvb_usb_dib0700",
+	.probe      = dib0700_probe,
+	.disconnect = dvb_usb_device_exit,
+	.id_table   = dib0700_usb_id_table,
+};
+
+/* module stuff */
+static int __init dib0700_module_init(void)
+{
+	int result;
+	info("loaded with support for %d different device-types", dib0700_device_count);
+	if ((result = usb_register(&dib0700_driver))) {
+		err("usb_register failed. Error number %d",result);
+		return result;
+	}
+
+	return 0;
+}
+
+static void __exit dib0700_module_exit(void)
+{
+	/* deregister this driver from the USB subsystem */
+	usb_deregister(&dib0700_driver);
+}
+
+module_init (dib0700_module_init);
+module_exit (dib0700_module_exit);
+
+MODULE_AUTHOR("Patrick Boettcher <pboettcher@dibcom.fr>");
+MODULE_DESCRIPTION("Driver for devices based on DiBcom DiB0700 - USB bridge");
+MODULE_VERSION("1.0");
+MODULE_LICENSE("GPL");