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/*****************************************************************************
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* Description: Irda SigmaTel USB Dongle
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* Author: Stephen Hemminger <shemminger@osdl.org>
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* Based on earlier driver by Paul Stewart <stewart@parc.com>
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* Copyright (C) 2000, Roman Weissgaerber <weissg@vienna.at>
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* Copyright (C) 2001, Dag Brattli <dag@brattli.net>
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* Copyright (C) 2001, Jean Tourrilhes <jt@hpl.hp.com>
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* Copyright (C) 2004, Stephen Hemminger <shemminger@osdl.org>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*****************************************************************************/
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* This dongle does no framing, and requires polling to receive the
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* data. The STIr4200 has bulk in and out endpoints just like
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* usr-irda devices, but the data it sends and receives is raw; like
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* irtty, it needs to call the wrap and unwrap functions to add and
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* remove SOF/BOF and escape characters to/from the frame.
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/time.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/usb.h>
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#include <linux/crc32.h>
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#include <linux/kthread.h>
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#include <linux/freezer.h>
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#include <net/irda/irda.h>
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#include <net/irda/irda_device.h>
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#include <net/irda/wrapper.h>
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#include <net/irda/crc.h>
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#include <asm/byteorder.h>
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#include <asm/unaligned.h>
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MODULE_AUTHOR("Stephen Hemminger <shemminger@linux-foundation.org>");
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MODULE_DESCRIPTION("IrDA-USB Dongle Driver for SigmaTel STIr4200");
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MODULE_LICENSE("GPL");
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static int qos_mtt_bits = 0x07; /* 1 ms or more */
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module_param(qos_mtt_bits, int, 0);
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MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
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static int rx_sensitivity = 1; /* FIR 0..4, SIR 0..6 */
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module_param(rx_sensitivity, int, 0);
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MODULE_PARM_DESC(rx_sensitivity, "Set Receiver sensitivity (0-6, 0 is most sensitive)");
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static int tx_power = 0; /* 0 = highest ... 3 = lowest */
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module_param(tx_power, int, 0);
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MODULE_PARM_DESC(tx_power, "Set Transmitter power (0-3, 0 is highest power)");
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#define STIR_IRDA_HEADER 4
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#define CTRL_TIMEOUT 100 /* milliseconds */
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#define TRANSMIT_TIMEOUT 200 /* milliseconds */
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#define STIR_FIFO_SIZE 4096
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#define FIFO_REGS_SIZE 3
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REQ_WRITE_SINGLE = 0x03,
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/* Register offsets */
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PDCLK_4000000 = 0x02,
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CTRL2_SPWIDTH = 0x08,
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enum StirFifoCtlMask {
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FIFOCTL_EMPTY = 0x04,
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struct usb_device *usbdev; /* init: probe_irda */
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struct net_device *netdev; /* network layer */
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struct irlap_cb *irlap; /* The link layer we are binded to */
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unsigned speed; /* Current speed */
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struct task_struct *thread; /* transmit thread */
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struct sk_buff *tx_pending;
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void *io_buf; /* transmit/receive buffer */
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iobuff_t rx_buff; /* receive unwrap state machine */
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struct timeval rx_time;
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/* These are the currently known USB ids */
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static struct usb_device_id dongles[] = {
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/* SigmaTel, Inc, STIr4200 IrDA/USB Bridge */
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{ USB_DEVICE(0x066f, 0x4200) },
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MODULE_DEVICE_TABLE(usb, dongles);
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/* Send control message to set dongle register */
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static int write_reg(struct stir_cb *stir, __u16 reg, __u8 value)
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struct usb_device *dev = stir->usbdev;
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pr_debug("%s: write reg %d = 0x%x\n",
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stir->netdev->name, reg, value);
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return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_DEVICE,
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/* Send control message to read multiple registers */
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static inline int read_reg(struct stir_cb *stir, __u16 reg,
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__u8 *data, __u16 count)
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struct usb_device *dev = stir->usbdev;
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return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
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USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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static inline int isfir(u32 speed)
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return speed == 4000000;
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* Prepare a FIR IrDA frame for transmission to the USB dongle. The
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* FIR transmit frame is documented in the datasheet. It consists of
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* a two byte 0x55 0xAA sequence, two little-endian length bytes, a
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* sequence of exactly 16 XBOF bytes of 0x7E, two BOF bytes of 0x7E,
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* then the data escaped as follows:
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* Then, 4 bytes of little endian (stuffed) FCS follow, then two
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* trailing EOF bytes of 0x7E.
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static inline __u8 *stuff_fir(__u8 *p, __u8 c)
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/* Take raw data in skb and put it wrapped into buf */
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static unsigned wrap_fir_skb(const struct sk_buff *skb, __u8 *buf)
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__u32 fcs = ~(crc32_le(~0, skb->data, skb->len));
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ptr = buf + STIR_IRDA_HEADER;
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memset(ptr, 0x7f, 16);
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/* Address / Control / Information */
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for (i = 0; i < skb->len; i++)
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ptr = stuff_fir(ptr, skb->data[i]);
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ptr = stuff_fir(ptr, fcs & 0xff);
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ptr = stuff_fir(ptr, (fcs >> 8) & 0xff);
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ptr = stuff_fir(ptr, (fcs >> 16) & 0xff);
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ptr = stuff_fir(ptr, (fcs >> 24) & 0xff);
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/* Total length, minus the header */
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wraplen = (ptr - buf) - STIR_IRDA_HEADER;
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buf[2] = wraplen & 0xff;
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buf[3] = (wraplen >> 8) & 0xff;
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return wraplen + STIR_IRDA_HEADER;
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static unsigned wrap_sir_skb(struct sk_buff *skb, __u8 *buf)
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wraplen = async_wrap_skb(skb, buf + STIR_IRDA_HEADER,
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STIR_FIFO_SIZE - STIR_IRDA_HEADER);
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buf[2] = wraplen & 0xff;
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buf[3] = (wraplen >> 8) & 0xff;
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return wraplen + STIR_IRDA_HEADER;
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* Frame is fully formed in the rx_buff so check crc
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* and pass up to irlap
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* setup for next receive
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static void fir_eof(struct stir_cb *stir)
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iobuff_t *rx_buff = &stir->rx_buff;
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int len = rx_buff->len - 4;
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struct sk_buff *skb, *nskb;
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if (unlikely(len <= 0)) {
323
pr_debug("%s: short frame len %d\n",
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stir->netdev->name, len);
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++stir->netdev->stats.rx_errors;
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++stir->netdev->stats.rx_length_errors;
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fcs = ~(crc32_le(~0, rx_buff->data, len));
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if (fcs != get_unaligned_le32(rx_buff->data + len)) {
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pr_debug("crc error calc 0x%x len %d\n", fcs, len);
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stir->netdev->stats.rx_errors++;
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stir->netdev->stats.rx_crc_errors++;
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/* if frame is short then just copy it */
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if (len < IRDA_RX_COPY_THRESHOLD) {
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nskb = dev_alloc_skb(len + 1);
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if (unlikely(!nskb)) {
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++stir->netdev->stats.rx_dropped;
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skb_reserve(nskb, 1);
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skb_copy_to_linear_data(nskb, rx_buff->data, len);
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nskb = dev_alloc_skb(rx_buff->truesize);
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if (unlikely(!nskb)) {
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++stir->netdev->stats.rx_dropped;
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skb_reserve(nskb, 1);
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rx_buff->head = nskb->data;
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skb_reset_mac_header(skb);
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skb->protocol = htons(ETH_P_IRDA);
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skb->dev = stir->netdev;
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stir->netdev->stats.rx_packets++;
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stir->netdev->stats.rx_bytes += len;
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rx_buff->data = rx_buff->head;
376
/* Unwrap FIR stuffed data and bump it to IrLAP */
377
static void stir_fir_chars(struct stir_cb *stir,
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const __u8 *bytes, int len)
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iobuff_t *rx_buff = &stir->rx_buff;
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for (i = 0; i < len; i++) {
384
__u8 byte = bytes[i];
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switch(rx_buff->state) {
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/* ignore garbage till start of frame */
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if (unlikely(byte != FIR_EOF))
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/* Now receiving frame */
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rx_buff->state = BEGIN_FRAME;
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/* Time to initialize receive buffer */
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rx_buff->data = rx_buff->head;
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if (byte == FIR_EOF) {
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pr_debug("%s: got EOF after escape\n",
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rx_buff->state = INSIDE_FRAME;
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/* ignore multiple BOF/EOF */
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rx_buff->state = INSIDE_FRAME;
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rx_buff->in_frame = TRUE;
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rx_buff->state = LINK_ESCAPE;
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/* 0x7f is not used in this framing */
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pr_debug("%s: got XBOF without escape\n",
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rx_buff->state = OUTSIDE_FRAME;
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rx_buff->in_frame = FALSE;
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/* add byte to rx buffer */
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if (unlikely(rx_buff->len >= rx_buff->truesize)) {
438
pr_debug("%s: fir frame exceeds %d\n",
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stir->netdev->name, rx_buff->truesize);
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++stir->netdev->stats.rx_over_errors;
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rx_buff->data[rx_buff->len++] = byte;
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++stir->netdev->stats.rx_frame_errors;
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++stir->netdev->stats.rx_errors;
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rx_buff->state = OUTSIDE_FRAME;
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rx_buff->in_frame = FALSE;
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/* Unwrap SIR stuffed data and bump it up to IrLAP */
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static void stir_sir_chars(struct stir_cb *stir,
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const __u8 *bytes, int len)
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for (i = 0; i < len; i++)
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async_unwrap_char(stir->netdev, &stir->netdev->stats,
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&stir->rx_buff, bytes[i]);
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static inline void unwrap_chars(struct stir_cb *stir,
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const __u8 *bytes, int length)
471
if (isfir(stir->speed))
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stir_fir_chars(stir, bytes, length);
474
stir_sir_chars(stir, bytes, length);
477
/* Mode parameters for each speed */
478
static const struct {
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{ 2400, PDCLK_2400 },
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{ 9600, PDCLK_9600 },
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{ 19200, PDCLK_19200 },
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{ 38400, PDCLK_38400 },
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{ 57600, PDCLK_57600 },
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{ 115200, PDCLK_115200 },
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{ 4000000, PDCLK_4000000 },
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* Setup chip for speed.
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* Called at startup to initialize the chip
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* and on speed changes.
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* Note: Write multiple registers doesn't appear to work
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static int change_speed(struct stir_cb *stir, unsigned speed)
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for (i = 0; i < ARRAY_SIZE(stir_modes); ++i) {
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if (speed == stir_modes[i].speed)
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dev_warn(&stir->netdev->dev, "invalid speed %d\n", speed);
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pr_debug("speed change from %d to %d\n", stir->speed, speed);
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/* Reset modulator */
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err = write_reg(stir, REG_CTRL1, CTRL1_SRESET);
520
/* Undocumented magic to tweak the DPLL */
521
err = write_reg(stir, REG_DPLL, 0x15);
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err = write_reg(stir, REG_PDCLK, stir_modes[i].pdclk);
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mode = MODE_NRESET | MODE_FASTRX;
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mode |= MODE_FIR | MODE_FFRSTEN;
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err = write_reg(stir, REG_MODE, mode);
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/* This resets TEMIC style transceiver if any. */
544
err = write_reg(stir, REG_CTRL1,
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CTRL1_SDMODE | (tx_power & 3) << 1);
549
err = write_reg(stir, REG_CTRL1, (tx_power & 3) << 1);
553
/* Reset sensitivity */
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err = write_reg(stir, REG_CTRL2, (rx_sensitivity & 7) << 5);
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* Called from net/core when new frame is available.
563
static netdev_tx_t stir_hard_xmit(struct sk_buff *skb,
564
struct net_device *netdev)
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struct stir_cb *stir = netdev_priv(netdev);
568
netif_stop_queue(netdev);
570
/* the IRDA wrapping routines don't deal with non linear skb */
571
SKB_LINEAR_ASSERT(skb);
573
skb = xchg(&stir->tx_pending, skb);
574
wake_up_process(stir->thread);
576
/* this should never happen unless stop/wakeup problem */
586
* Wait for the transmit FIFO to have space for next data
588
* If space < 0 then wait till FIFO completely drains.
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* FYI: can take up to 13 seconds at 2400baud.
591
static int fifo_txwait(struct stir_cb *stir, int space)
594
unsigned long count, status;
595
unsigned long prev_count = 0x1fff;
597
/* Read FIFO status and count */
598
for (;; prev_count = count) {
599
err = read_reg(stir, REG_FIFOCTL, stir->fifo_status,
601
if (unlikely(err != FIFO_REGS_SIZE)) {
602
dev_warn(&stir->netdev->dev,
603
"FIFO register read error: %d\n", err);
608
status = stir->fifo_status[0];
609
count = (unsigned)(stir->fifo_status[2] & 0x1f) << 8
610
| stir->fifo_status[1];
612
pr_debug("fifo status 0x%lx count %lu\n", status, count);
614
/* is fifo receiving already, or empty */
615
if (!(status & FIFOCTL_DIR) ||
616
(status & FIFOCTL_EMPTY))
619
if (signal_pending(current))
623
if (!netif_running(stir->netdev) ||
624
!netif_device_present(stir->netdev))
627
/* only waiting for some space */
628
if (space >= 0 && STIR_FIFO_SIZE - 4 > space + count)
632
if (prev_count < count)
635
/* estimate transfer time for remaining chars */
636
msleep((count * 8000) / stir->speed);
639
err = write_reg(stir, REG_FIFOCTL, FIFOCTL_CLR);
642
err = write_reg(stir, REG_FIFOCTL, 0);
650
/* Wait for turnaround delay before starting transmit. */
651
static void turnaround_delay(const struct stir_cb *stir, long us)
659
do_gettimeofday(&now);
660
if (now.tv_sec - stir->rx_time.tv_sec > 0)
662
us -= now.tv_usec - stir->rx_time.tv_usec;
666
ticks = us / (1000000 / HZ);
668
schedule_timeout_interruptible(1 + ticks);
674
* Start receiver by submitting a request to the receive pipe.
675
* If nothing is available it will return after rx_interval.
677
static int receive_start(struct stir_cb *stir)
682
stir->rx_buff.in_frame = FALSE;
683
stir->rx_buff.state = OUTSIDE_FRAME;
685
stir->rx_urb->status = 0;
686
return usb_submit_urb(stir->rx_urb, GFP_KERNEL);
689
/* Stop all pending receive Urb's */
690
static void receive_stop(struct stir_cb *stir)
693
usb_kill_urb(stir->rx_urb);
695
if (stir->rx_buff.in_frame)
696
stir->netdev->stats.collisions++;
699
* Wrap data in socket buffer and send it.
701
static void stir_send(struct stir_cb *stir, struct sk_buff *skb)
706
/* if receiving, need to turnaround */
707
if (stir->receiving) {
709
turnaround_delay(stir, irda_get_mtt(skb));
713
if (isfir(stir->speed))
714
wraplen = wrap_fir_skb(skb, stir->io_buf);
716
wraplen = wrap_sir_skb(skb, stir->io_buf);
718
/* check for space available in fifo */
720
fifo_txwait(stir, wraplen);
722
stir->netdev->stats.tx_packets++;
723
stir->netdev->stats.tx_bytes += skb->len;
724
stir->netdev->trans_start = jiffies;
725
pr_debug("send %d (%d)\n", skb->len, wraplen);
727
if (usb_bulk_msg(stir->usbdev, usb_sndbulkpipe(stir->usbdev, 1),
728
stir->io_buf, wraplen,
729
NULL, TRANSMIT_TIMEOUT))
730
stir->netdev->stats.tx_errors++;
734
* Transmit state machine thread
736
static int stir_transmit_thread(void *arg)
738
struct stir_cb *stir = arg;
739
struct net_device *dev = stir->netdev;
742
while (!kthread_should_stop()) {
744
/* if suspending, then power off and wait */
745
if (unlikely(freezing(current))) {
749
fifo_txwait(stir, -1);
751
write_reg(stir, REG_CTRL1, CTRL1_TXPWD|CTRL1_RXPWD);
755
if (change_speed(stir, stir->speed))
760
/* if something to send? */
761
skb = xchg(&stir->tx_pending, NULL);
763
unsigned new_speed = irda_get_next_speed(skb);
764
netif_wake_queue(dev);
767
stir_send(stir, skb);
770
if ((new_speed != -1) && (stir->speed != new_speed)) {
771
if (fifo_txwait(stir, -1) ||
772
change_speed(stir, new_speed))
778
/* nothing to send? start receiving */
779
if (!stir->receiving &&
780
irda_device_txqueue_empty(dev)) {
781
/* Wait otherwise chip gets confused. */
782
if (fifo_txwait(stir, -1))
785
if (unlikely(receive_start(stir))) {
788
"%s: receive usb submit failed\n",
796
/* sleep if nothing to send */
797
set_current_state(TASK_INTERRUPTIBLE);
806
* USB bulk receive completion callback.
807
* Wakes up every ms (usb round trip) with wrapped
810
static void stir_rcv_irq(struct urb *urb)
812
struct stir_cb *stir = urb->context;
815
/* in process of stopping, just drop data */
816
if (!netif_running(stir->netdev))
819
/* unlink, shutdown, unplug, other nasties */
820
if (urb->status != 0)
823
if (urb->actual_length > 0) {
824
pr_debug("receive %d\n", urb->actual_length);
825
unwrap_chars(stir, urb->transfer_buffer,
828
do_gettimeofday(&stir->rx_time);
831
/* kernel thread is stopping receiver don't resubmit */
832
if (!stir->receiving)
835
/* resubmit existing urb */
836
err = usb_submit_urb(urb, GFP_ATOMIC);
838
/* in case of error, the kernel thread will restart us */
840
dev_warn(&stir->netdev->dev, "usb receive submit error: %d\n",
843
wake_up_process(stir->thread);
848
* Function stir_net_open (dev)
850
* Network device is taken up. Usually this is done by "ifconfig irda0 up"
852
static int stir_net_open(struct net_device *netdev)
854
struct stir_cb *stir = netdev_priv(netdev);
858
err = usb_clear_halt(stir->usbdev, usb_sndbulkpipe(stir->usbdev, 1));
861
err = usb_clear_halt(stir->usbdev, usb_rcvbulkpipe(stir->usbdev, 2));
865
err = change_speed(stir, 9600);
871
/* Initialize for SIR/FIR to copy data directly into skb. */
873
stir->rx_buff.truesize = IRDA_SKB_MAX_MTU;
874
stir->rx_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
875
if (!stir->rx_buff.skb)
878
skb_reserve(stir->rx_buff.skb, 1);
879
stir->rx_buff.head = stir->rx_buff.skb->data;
880
do_gettimeofday(&stir->rx_time);
882
stir->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
886
stir->io_buf = kmalloc(STIR_FIFO_SIZE, GFP_KERNEL);
890
usb_fill_bulk_urb(stir->rx_urb, stir->usbdev,
891
usb_rcvbulkpipe(stir->usbdev, 2),
892
stir->io_buf, STIR_FIFO_SIZE,
895
stir->fifo_status = kmalloc(FIFO_REGS_SIZE, GFP_KERNEL);
896
if (!stir->fifo_status)
900
* Now that everything should be initialized properly,
901
* Open new IrLAP layer instance to take care of us...
902
* Note : will send immediately a speed change...
904
sprintf(hwname, "usb#%d", stir->usbdev->devnum);
905
stir->irlap = irlap_open(netdev, &stir->qos, hwname);
907
err("stir4200: irlap_open failed");
911
/** Start kernel thread for transmit. */
912
stir->thread = kthread_run(stir_transmit_thread, stir,
913
"%s", stir->netdev->name);
914
if (IS_ERR(stir->thread)) {
915
err = PTR_ERR(stir->thread);
916
err("stir4200: unable to start kernel thread");
920
netif_start_queue(netdev);
925
irlap_close(stir->irlap);
927
kfree(stir->fifo_status);
931
usb_free_urb(stir->rx_urb);
933
kfree_skb(stir->rx_buff.skb);
939
* Function stir_net_close (stir)
941
* Network device is taken down. Usually this is done by
942
* "ifconfig irda0 down"
944
static int stir_net_close(struct net_device *netdev)
946
struct stir_cb *stir = netdev_priv(netdev);
948
/* Stop transmit processing */
949
netif_stop_queue(netdev);
951
/* Kill transmit thread */
952
kthread_stop(stir->thread);
953
kfree(stir->fifo_status);
955
/* Mop up receive urb's */
956
usb_kill_urb(stir->rx_urb);
959
usb_free_urb(stir->rx_urb);
960
kfree_skb(stir->rx_buff.skb);
962
/* Stop and remove instance of IrLAP */
964
irlap_close(stir->irlap);
972
* IOCTLs : Extra out-of-band network commands...
974
static int stir_net_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
976
struct if_irda_req *irq = (struct if_irda_req *) rq;
977
struct stir_cb *stir = netdev_priv(netdev);
981
case SIOCSBANDWIDTH: /* Set bandwidth */
982
if (!capable(CAP_NET_ADMIN))
985
/* Check if the device is still there */
986
if (netif_device_present(stir->netdev))
987
ret = change_speed(stir, irq->ifr_baudrate);
990
case SIOCSMEDIABUSY: /* Set media busy */
991
if (!capable(CAP_NET_ADMIN))
994
/* Check if the IrDA stack is still there */
995
if (netif_running(stir->netdev))
996
irda_device_set_media_busy(stir->netdev, TRUE);
1000
/* Only approximately true */
1001
irq->ifr_receiving = stir->receiving;
1011
static const struct net_device_ops stir_netdev_ops = {
1012
.ndo_open = stir_net_open,
1013
.ndo_stop = stir_net_close,
1014
.ndo_start_xmit = stir_hard_xmit,
1015
.ndo_do_ioctl = stir_net_ioctl,
1019
* This routine is called by the USB subsystem for each new device
1020
* in the system. We need to check if the device is ours, and in
1021
* this case start handling it.
1022
* Note : it might be worth protecting this function by a global
1023
* spinlock... Or not, because maybe USB already deal with that...
1025
static int stir_probe(struct usb_interface *intf,
1026
const struct usb_device_id *id)
1028
struct usb_device *dev = interface_to_usbdev(intf);
1029
struct stir_cb *stir = NULL;
1030
struct net_device *net;
1033
/* Allocate network device container. */
1034
net = alloc_irdadev(sizeof(*stir));
1038
SET_NETDEV_DEV(net, &intf->dev);
1039
stir = netdev_priv(net);
1043
ret = usb_reset_configuration(dev);
1045
err("stir4200: usb reset configuration failed");
1049
printk(KERN_INFO "SigmaTel STIr4200 IRDA/USB found at address %d, "
1050
"Vendor: %x, Product: %x\n",
1051
dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
1052
le16_to_cpu(dev->descriptor.idProduct));
1054
/* Initialize QoS for this device */
1055
irda_init_max_qos_capabilies(&stir->qos);
1057
/* That's the Rx capability. */
1058
stir->qos.baud_rate.bits &= IR_2400 | IR_9600 | IR_19200 |
1059
IR_38400 | IR_57600 | IR_115200 |
1061
stir->qos.min_turn_time.bits &= qos_mtt_bits;
1062
irda_qos_bits_to_value(&stir->qos);
1064
/* Override the network functions we need to use */
1065
net->netdev_ops = &stir_netdev_ops;
1067
ret = register_netdev(net);
1071
dev_info(&intf->dev, "IrDA: Registered SigmaTel device %s\n",
1074
usb_set_intfdata(intf, stir);
1085
* The current device is removed, the USB layer tell us to shut it down...
1087
static void stir_disconnect(struct usb_interface *intf)
1089
struct stir_cb *stir = usb_get_intfdata(intf);
1094
unregister_netdev(stir->netdev);
1095
free_netdev(stir->netdev);
1097
usb_set_intfdata(intf, NULL);
1101
/* USB suspend, so power off the transmitter/receiver */
1102
static int stir_suspend(struct usb_interface *intf, pm_message_t message)
1104
struct stir_cb *stir = usb_get_intfdata(intf);
1106
netif_device_detach(stir->netdev);
1110
/* Coming out of suspend, so reset hardware */
1111
static int stir_resume(struct usb_interface *intf)
1113
struct stir_cb *stir = usb_get_intfdata(intf);
1115
netif_device_attach(stir->netdev);
1117
/* receiver restarted when send thread wakes up */
1123
* USB device callbacks
1125
static struct usb_driver irda_driver = {
1127
.probe = stir_probe,
1128
.disconnect = stir_disconnect,
1129
.id_table = dongles,
1131
.suspend = stir_suspend,
1132
.resume = stir_resume,
1139
static int __init stir_init(void)
1141
return usb_register(&irda_driver);
1143
module_init(stir_init);
1148
static void __exit stir_cleanup(void)
1150
/* Deregister the driver and remove all pending instances */
1151
usb_deregister(&irda_driver);
1153
module_exit(stir_cleanup);