280 lines
6.8 KiB
C
280 lines
6.8 KiB
C
/* Linux driver for devices based on the DiBcom DiB0700 USB bridge
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation, version 2.
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*
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* Copyright (C) 2005-6 DiBcom, SA
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*/
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#include "dib0700.h"
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/* debug */
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int dvb_usb_dib0700_debug;
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module_param_named(debug,dvb_usb_dib0700_debug, int, 0644);
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MODULE_PARM_DESC(debug, "set debugging level (1=info,2=fw,4=fwdata,8=data (or-able))." DVB_USB_DEBUG_STATUS);
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/* expecting rx buffer: request data[0] data[1] ... data[2] */
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static int dib0700_ctrl_wr(struct dvb_usb_device *d, u8 *tx, u8 txlen)
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{
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int status;
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deb_data(">>> ");
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debug_dump(tx,txlen,deb_data);
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status = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev,0),
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tx[0], USB_TYPE_VENDOR | USB_DIR_OUT, 0, 0, tx, txlen,
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USB_CTRL_GET_TIMEOUT);
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if (status != txlen)
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deb_data("ep 0 write error (status = %d, len: %d)\n",status,txlen);
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return status < 0 ? status : 0;
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}
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/* expecting tx buffer: request data[0] ... data[n] (n <= 4) */
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static int dib0700_ctrl_rd(struct dvb_usb_device *d, u8 *tx, u8 txlen, u8 *rx, u8 rxlen)
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{
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u16 index, value;
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int status;
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if (txlen < 2) {
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err("tx buffer length is smaller than 2. Makes no sense.");
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return -EINVAL;
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}
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if (txlen > 4) {
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err("tx buffer length is larger than 4. Not supported.");
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return -EINVAL;
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}
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deb_data(">>> ");
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debug_dump(tx,txlen,deb_data);
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value = ((txlen - 2) << 8) | tx[1];
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index = 0;
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if (txlen > 2)
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index |= (tx[2] << 8);
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if (txlen > 3)
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index |= tx[3];
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/* think about swapping here */
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value = le16_to_cpu(value);
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index = le16_to_cpu(index);
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status = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev,0), tx[0],
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USB_TYPE_VENDOR | USB_DIR_IN, value, index, rx, rxlen,
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USB_CTRL_GET_TIMEOUT);
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if (status < 0)
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deb_info("ep 0 read error (status = %d)\n",status);
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deb_data("<<< ");
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debug_dump(rx,rxlen,deb_data);
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return status; /* length in case of success */
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}
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int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_dir, u8 gpio_val)
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{
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u8 buf[3] = { REQUEST_SET_GPIO, gpio, ((gpio_dir & 0x01) << 7) | ((gpio_val & 0x01) << 6) };
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return dib0700_ctrl_wr(d,buf,3);
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}
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/*
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* I2C master xfer function
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*/
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static int dib0700_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg *msg,int num)
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{
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struct dvb_usb_device *d = i2c_get_adapdata(adap);
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int i,len;
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u8 buf[255];
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if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
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return -EAGAIN;
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for (i = 0; i < num; i++) {
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/* fill in the address */
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buf[1] = (msg[i].addr << 1);
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/* fill the buffer */
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memcpy(&buf[2], msg[i].buf, msg[i].len);
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/* write/read request */
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if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
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buf[0] = REQUEST_I2C_READ;
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buf[1] |= 1;
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/* special thing in the current firmware: when length is zero the read-failed */
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if ((len = dib0700_ctrl_rd(d, buf, msg[i].len + 2, msg[i+1].buf, msg[i+1].len)) <= 0) {
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deb_info("I2C read failed on address %x\n", msg[i].addr);
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break;
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}
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msg[i+1].len = len;
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i++;
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} else {
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buf[0] = REQUEST_I2C_WRITE;
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if (dib0700_ctrl_wr(d, buf, msg[i].len + 2) < 0)
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break;
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}
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}
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mutex_unlock(&d->i2c_mutex);
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return i;
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}
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static u32 dib0700_i2c_func(struct i2c_adapter *adapter)
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{
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return I2C_FUNC_I2C;
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}
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struct i2c_algorithm dib0700_i2c_algo = {
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.master_xfer = dib0700_i2c_xfer,
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.functionality = dib0700_i2c_func,
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};
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int dib0700_identify_state(struct usb_device *udev, struct dvb_usb_device_properties *props,
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struct dvb_usb_device_description **desc, int *cold)
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{
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u8 buf[3] = { REQUEST_SET_GPIO, 4, (GPIO_IN << 7) | (0 << 6) }; // GPIO4 is save - used for I2C
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*cold = usb_control_msg(udev, usb_sndctrlpipe(udev,0),
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buf[0], USB_TYPE_VENDOR | USB_DIR_OUT, 0, 0, buf, 3, USB_CTRL_GET_TIMEOUT) != 3;
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deb_info("cold: %d\n", *cold);
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return 0;
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}
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static int dib0700_jumpram(struct usb_device *udev, u32 address)
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{
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int ret, actlen;
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u8 buf[8] = { REQUEST_JUMPRAM, 0, 0, 0,
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(address >> 24) & 0xff,
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(address >> 16) & 0xff,
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(address >> 8) & 0xff,
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address & 0xff };
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if ((ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, 0x01),buf,8,&actlen,1000)) < 0) {
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deb_fw("jumpram to 0x%x failed\n",address);
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return ret;
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}
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if (actlen != 8) {
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deb_fw("jumpram to 0x%x failed\n",address);
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return -EIO;
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}
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return 0;
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}
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int dib0700_download_firmware(struct usb_device *udev, const struct firmware *fw)
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{
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struct hexline hx;
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int pos = 0, ret, act_len;
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u8 buf[260];
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while ((ret = dvb_usb_get_hexline(fw, &hx, &pos)) > 0) {
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deb_fwdata("writing to address 0x%08x (buffer: 0x%02x %02x)\n",hx.addr, hx.len, hx.chk);
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buf[0] = hx.len;
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buf[1] = (hx.addr >> 8) & 0xff;
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buf[2] = hx.addr & 0xff;
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buf[3] = hx.type;
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memcpy(&buf[4],hx.data,hx.len);
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buf[4+hx.len] = hx.chk;
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ret = usb_bulk_msg(udev,
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usb_sndbulkpipe(udev, 0x01),
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buf,
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hx.len + 5,
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&act_len,
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1000);
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if (ret < 0) {
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err("firmware download failed at %d with %d",pos,ret);
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return ret;
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}
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}
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if (ret == 0) {
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/* start the firmware */
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if ((ret = dib0700_jumpram(udev, 0x70000000)) == 0) {
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info("firmware started successfully.");
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msleep(100);
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}
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} else
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ret = -EIO;
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return ret;
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}
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int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
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{
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struct dib0700_state *st = adap->dev->priv;
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u8 b[4];
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b[0] = REQUEST_ENABLE_VIDEO;
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b[1] = 0x00;
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b[2] = (0x01 << 4); /* Master mode */
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b[3] = 0x00;
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deb_info("modifying (%d) streaming state for %d\n", onoff, adap->id);
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if (onoff)
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st->channel_state |= 1 << adap->id;
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else
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st->channel_state &= ~(1 << adap->id);
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b[2] |= st->channel_state;
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if (st->channel_state) /* if at least one channel is active */
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b[1] = (0x01 << 4) | 0x00;
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deb_info("data for streaming: %x %x\n",b[1],b[2]);
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return dib0700_ctrl_wr(adap->dev, b, 4);
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}
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static int dib0700_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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int i;
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for (i = 0; i < dib0700_device_count; i++)
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if (dvb_usb_device_init(intf, &dib0700_devices[i], THIS_MODULE, NULL) == 0)
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return 0;
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return -ENODEV;
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}
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static struct usb_driver dib0700_driver = {
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.name = "dvb_usb_dib0700",
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.probe = dib0700_probe,
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.disconnect = dvb_usb_device_exit,
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.id_table = dib0700_usb_id_table,
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};
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/* module stuff */
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static int __init dib0700_module_init(void)
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{
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int result;
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info("loaded with support for %d different device-types", dib0700_device_count);
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if ((result = usb_register(&dib0700_driver))) {
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err("usb_register failed. Error number %d",result);
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return result;
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}
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return 0;
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}
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static void __exit dib0700_module_exit(void)
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{
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/* deregister this driver from the USB subsystem */
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usb_deregister(&dib0700_driver);
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}
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module_init (dib0700_module_init);
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module_exit (dib0700_module_exit);
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MODULE_AUTHOR("Patrick Boettcher <pboettcher@dibcom.fr>");
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MODULE_DESCRIPTION("Driver for devices based on DiBcom DiB0700 - USB bridge");
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MODULE_VERSION("1.0");
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MODULE_LICENSE("GPL");
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