diff options
Diffstat (limited to 'drivers/char/synclink_gt.c')
| -rw-r--r-- | drivers/char/synclink_gt.c | 401 |
1 files changed, 222 insertions, 179 deletions
diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c index 55c1653be00c..3e9058993e41 100644 --- a/drivers/char/synclink_gt.c +++ b/drivers/char/synclink_gt.c @@ -165,7 +165,7 @@ static int read_proc(char *page, char **start, off_t off, int count,int *eof, v static int chars_in_buffer(struct tty_struct *tty); static void throttle(struct tty_struct * tty); static void unthrottle(struct tty_struct * tty); -static void set_break(struct tty_struct *tty, int break_state); +static int set_break(struct tty_struct *tty, int break_state); /* * generic HDLC support and callbacks @@ -214,6 +214,7 @@ struct slgt_desc char *buf; /* virtual address of data buffer */ unsigned int pdesc; /* physical address of this descriptor */ dma_addr_t buf_dma_addr; + unsigned short buf_count; }; #define set_desc_buffer(a,b) (a).pbuf = cpu_to_le32((unsigned int)(b)) @@ -244,11 +245,11 @@ struct _input_signal_events { */ struct slgt_info { void *if_ptr; /* General purpose pointer (used by SPPP) */ + struct tty_port port; struct slgt_info *next_device; /* device list link */ int magic; - int flags; char device_name[25]; struct pci_dev *pdev; @@ -260,23 +261,15 @@ struct slgt_info { /* array of pointers to port contexts on this adapter */ struct slgt_info *port_array[SLGT_MAX_PORTS]; - int count; /* count of opens */ int line; /* tty line instance number */ - unsigned short close_delay; - unsigned short closing_wait; /* time to wait before closing */ struct mgsl_icount icount; - struct tty_struct *tty; int timeout; int x_char; /* xon/xoff character */ - int blocked_open; /* # of blocked opens */ unsigned int read_status_mask; unsigned int ignore_status_mask; - wait_queue_head_t open_wait; - wait_queue_head_t close_wait; - wait_queue_head_t status_event_wait_q; wait_queue_head_t event_wait_q; struct timer_list tx_timer; @@ -310,7 +303,7 @@ struct slgt_info { u32 idle_mode; u32 max_frame_size; /* as set by device config */ - unsigned int raw_rx_size; + unsigned int rbuf_fill_level; unsigned int if_mode; /* device status */ @@ -474,6 +467,7 @@ static void tx_start(struct slgt_info *info); static void tx_stop(struct slgt_info *info); static void tx_set_idle(struct slgt_info *info); static unsigned int free_tbuf_count(struct slgt_info *info); +static unsigned int tbuf_bytes(struct slgt_info *info); static void reset_tbufs(struct slgt_info *info); static void tdma_reset(struct slgt_info *info); static void tdma_start(struct slgt_info *info); @@ -521,7 +515,7 @@ static int wait_mgsl_event(struct slgt_info *info, int __user *mask_ptr); static int tiocmget(struct tty_struct *tty, struct file *file); static int tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear); -static void set_break(struct tty_struct *tty, int break_state); +static int set_break(struct tty_struct *tty, int break_state); static int get_interface(struct slgt_info *info, int __user *if_mode); static int set_interface(struct slgt_info *info, int if_mode); static int set_gpio(struct slgt_info *info, struct gpio_desc __user *gpio); @@ -641,8 +635,8 @@ static void ldisc_receive_buf(struct tty_struct *tty, return; ld = tty_ldisc_ref(tty); if (ld) { - if (ld->receive_buf) - ld->receive_buf(tty, data, flags, count); + if (ld->ops->receive_buf) + ld->ops->receive_buf(tty, data, flags, count); tty_ldisc_deref(ld); } } @@ -672,20 +666,20 @@ static int open(struct tty_struct *tty, struct file *filp) } tty->driver_data = info; - info->tty = tty; + info->port.tty = tty; - DBGINFO(("%s open, old ref count = %d\n", info->device_name, info->count)); + DBGINFO(("%s open, old ref count = %d\n", info->device_name, info->port.count)); /* If port is closing, signal caller to try again */ - if (tty_hung_up_p(filp) || info->flags & ASYNC_CLOSING){ - if (info->flags & ASYNC_CLOSING) - interruptible_sleep_on(&info->close_wait); - retval = ((info->flags & ASYNC_HUP_NOTIFY) ? + if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){ + if (info->port.flags & ASYNC_CLOSING) + interruptible_sleep_on(&info->port.close_wait); + retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS); goto cleanup; } - info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; + info->port.tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0; spin_lock_irqsave(&info->netlock, flags); if (info->netcount) { @@ -693,10 +687,10 @@ static int open(struct tty_struct *tty, struct file *filp) spin_unlock_irqrestore(&info->netlock, flags); goto cleanup; } - info->count++; + info->port.count++; spin_unlock_irqrestore(&info->netlock, flags); - if (info->count == 1) { + if (info->port.count == 1) { /* 1st open on this device, init hardware */ retval = startup(info); if (retval < 0) @@ -714,9 +708,9 @@ static int open(struct tty_struct *tty, struct file *filp) cleanup: if (retval) { if (tty->count == 1) - info->tty = NULL; /* tty layer will release tty struct */ - if(info->count) - info->count--; + info->port.tty = NULL; /* tty layer will release tty struct */ + if(info->port.count) + info->port.count--; } DBGINFO(("%s open rc=%d\n", info->device_name, retval)); @@ -729,32 +723,32 @@ static void close(struct tty_struct *tty, struct file *filp) if (sanity_check(info, tty->name, "close")) return; - DBGINFO(("%s close entry, count=%d\n", info->device_name, info->count)); + DBGINFO(("%s close entry, count=%d\n", info->device_name, info->port.count)); - if (!info->count) + if (!info->port.count) return; if (tty_hung_up_p(filp)) goto cleanup; - if ((tty->count == 1) && (info->count != 1)) { + if ((tty->count == 1) && (info->port.count != 1)) { /* * tty->count is 1 and the tty structure will be freed. - * info->count should be one in this case. + * info->port.count should be one in this case. * if it's not, correct it so that the port is shutdown. */ DBGERR(("%s close: bad refcount; tty->count=1, " - "info->count=%d\n", info->device_name, info->count)); - info->count = 1; + "info->port.count=%d\n", info->device_name, info->port.count)); + info->port.count = 1; } - info->count--; + info->port.count--; /* if at least one open remaining, leave hardware active */ - if (info->count) + if (info->port.count) goto cleanup; - info->flags |= ASYNC_CLOSING; + info->port.flags |= ASYNC_CLOSING; /* set tty->closing to notify line discipline to * only process XON/XOFF characters. Only the N_TTY @@ -764,12 +758,12 @@ static void close(struct tty_struct *tty, struct file *filp) /* wait for transmit data to clear all layers */ - if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) { + if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE) { DBGINFO(("%s call tty_wait_until_sent\n", info->device_name)); - tty_wait_until_sent(tty, info->closing_wait); + tty_wait_until_sent(tty, info->port.closing_wait); } - if (info->flags & ASYNC_INITIALIZED) + if (info->port.flags & ASYNC_INITIALIZED) wait_until_sent(tty, info->timeout); flush_buffer(tty); tty_ldisc_flush(tty); @@ -777,21 +771,21 @@ static void close(struct tty_struct *tty, struct file *filp) shutdown(info); tty->closing = 0; - info->tty = NULL; + info->port.tty = NULL; - if (info->blocked_open) { - if (info->close_delay) { - msleep_interruptible(jiffies_to_msecs(info->close_delay)); + if (info->port.blocked_open) { + if (info->port.close_delay) { + msleep_interruptible(jiffies_to_msecs(info->port.close_delay)); } - wake_up_interruptible(&info->open_wait); + wake_up_interruptible(&info->port.open_wait); } - info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); + info->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); - wake_up_interruptible(&info->close_wait); + wake_up_interruptible(&info->port.close_wait); cleanup: - DBGINFO(("%s close exit, count=%d\n", tty->driver->name, info->count)); + DBGINFO(("%s close exit, count=%d\n", tty->driver->name, info->port.count)); } static void hangup(struct tty_struct *tty) @@ -805,11 +799,11 @@ static void hangup(struct tty_struct *tty) flush_buffer(tty); shutdown(info); - info->count = 0; - info->flags &= ~ASYNC_NORMAL_ACTIVE; - info->tty = NULL; + info->port.count = 0; + info->port.flags &= ~ASYNC_NORMAL_ACTIVE; + info->port.tty = NULL; - wake_up_interruptible(&info->open_wait); + wake_up_interruptible(&info->port.open_wait); } static void set_termios(struct tty_struct *tty, struct ktermios *old_termios) @@ -857,6 +851,7 @@ static int write(struct tty_struct *tty, int ret = 0; struct slgt_info *info = tty->driver_data; unsigned long flags; + unsigned int bufs_needed; if (sanity_check(info, tty->name, "write")) goto cleanup; @@ -873,25 +868,16 @@ static int write(struct tty_struct *tty, if (!count) goto cleanup; - if (info->params.mode == MGSL_MODE_RAW || - info->params.mode == MGSL_MODE_MONOSYNC || - info->params.mode == MGSL_MODE_BISYNC) { - unsigned int bufs_needed = (count/DMABUFSIZE); - unsigned int bufs_free = free_tbuf_count(info); - if (count % DMABUFSIZE) - ++bufs_needed; - if (bufs_needed > bufs_free) - goto cleanup; - } else { - if (info->tx_active) - goto cleanup; - if (info->tx_count) { - /* send accumulated data from send_char() calls */ - /* as frame and wait before accepting more data. */ - tx_load(info, info->tx_buf, info->tx_count); - goto start; - } + if (!info->tx_active && info->tx_count) { + /* send accumulated data from send_char() */ + tx_load(info, info->tx_buf, info->tx_count); + goto start; } + bufs_needed = (count/DMABUFSIZE); + if (count % DMABUFSIZE) + ++bufs_needed; + if (bufs_needed > free_tbuf_count(info)) + goto cleanup; ret = info->tx_count = count; tx_load(info, buf, count); @@ -959,7 +945,7 @@ static void wait_until_sent(struct tty_struct *tty, int timeout) if (sanity_check(info, tty->name, "wait_until_sent")) return; DBGINFO(("%s wait_until_sent entry\n", info->device_name)); - if (!(info->flags & ASYNC_INITIALIZED)) + if (!(info->port.flags & ASYNC_INITIALIZED)) goto exit; orig_jiffies = jiffies; @@ -1404,10 +1390,12 @@ done: static int chars_in_buffer(struct tty_struct *tty) { struct slgt_info *info = tty->driver_data; + int count; if (sanity_check(info, tty->name, "chars_in_buffer")) return 0; - DBGINFO(("%s chars_in_buffer()=%d\n", info->device_name, info->tx_count)); - return info->tx_count; + count = tbuf_bytes(info); + DBGINFO(("%s chars_in_buffer()=%d\n", info->device_name, count)); + return count; } /* @@ -1460,14 +1448,14 @@ static void unthrottle(struct tty_struct * tty) * set or clear transmit break condition * break_state -1=set break condition, 0=clear */ -static void set_break(struct tty_struct *tty, int break_state) +static int set_break(struct tty_struct *tty, int break_state) { struct slgt_info *info = tty->driver_data; unsigned short value; unsigned long flags; if (sanity_check(info, tty->name, "set_break")) - return; + return -EINVAL; DBGINFO(("%s set_break(%d)\n", info->device_name, break_state)); spin_lock_irqsave(&info->lock,flags); @@ -1478,6 +1466,7 @@ static void set_break(struct tty_struct *tty, int break_state) value &= ~BIT6; wr_reg16(info, TCR, value); spin_unlock_irqrestore(&info->lock,flags); + return 0; } #if SYNCLINK_GENERIC_HDLC @@ -1500,7 +1489,7 @@ static int hdlcdev_attach(struct net_device *dev, unsigned short encoding, unsigned short new_crctype; /* return error if TTY interface open */ - if (info->count) + if (info->port.count) return -EBUSY; DBGINFO(("%s hdlcdev_attach\n", info->device_name)); @@ -1544,7 +1533,6 @@ static int hdlcdev_attach(struct net_device *dev, unsigned short encoding, static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev) { struct slgt_info *info = dev_to_port(dev); - struct net_device_stats *stats = hdlc_stats(dev); unsigned long flags; DBGINFO(("%s hdlc_xmit\n", dev->name)); @@ -1557,8 +1545,8 @@ static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev) tx_load(info, skb->data, skb->len); /* update network statistics */ - stats->tx_packets++; - stats->tx_bytes += skb->len; + dev->stats.tx_packets++; + dev->stats.tx_bytes += skb->len; /* done with socket buffer, so free it */ dev_kfree_skb(skb); @@ -1600,7 +1588,7 @@ static int hdlcdev_open(struct net_device *dev) /* arbitrate between network and tty opens */ spin_lock_irqsave(&info->netlock, flags); - if (info->count != 0 || info->netcount != 0) { + if (info->port.count != 0 || info->netcount != 0) { DBGINFO(("%s hdlc_open busy\n", dev->name)); spin_unlock_irqrestore(&info->netlock, flags); return -EBUSY; @@ -1685,7 +1673,7 @@ static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) DBGINFO(("%s hdlcdev_ioctl\n", dev->name)); /* return error if TTY interface open */ - if (info->count) + if (info->port.count) return -EBUSY; if (cmd != SIOCWANDEV) @@ -1775,13 +1763,12 @@ static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) static void hdlcdev_tx_timeout(struct net_device *dev) { struct slgt_info *info = dev_to_port(dev); - struct net_device_stats *stats = hdlc_stats(dev); unsigned long flags; DBGINFO(("%s hdlcdev_tx_timeout\n", dev->name)); - stats->tx_errors++; - stats->tx_aborted_errors++; + dev->stats.tx_errors++; + dev->stats.tx_aborted_errors++; spin_lock_irqsave(&info->lock,flags); tx_stop(info); @@ -1814,26 +1801,25 @@ static void hdlcdev_rx(struct slgt_info *info, char *buf, int size) { struct sk_buff *skb = dev_alloc_skb(size); struct net_device *dev = info->netdev; - struct net_device_stats *stats = hdlc_stats(dev); DBGINFO(("%s hdlcdev_rx\n", dev->name)); if (skb == NULL) { DBGERR(("%s: can't alloc skb, drop packet\n", dev->name)); - stats->rx_dropped++; + dev->stats.rx_dropped++; return; } - memcpy(skb_put(skb, size),buf,size); + memcpy(skb_put(skb, size), buf, size); - skb->protocol = hdlc_type_trans(skb, info->netdev); + skb->protocol = hdlc_type_trans(skb, dev); - stats->rx_packets++; - stats->rx_bytes += size; + dev->stats.rx_packets++; + dev->stats.rx_bytes += size; netif_rx(skb); - info->netdev->last_rx = jiffies; + dev->last_rx = jiffies; } /** @@ -1906,7 +1892,7 @@ static void hdlcdev_exit(struct slgt_info *info) */ static void rx_async(struct slgt_info *info) { - struct tty_struct *tty = info->tty; + struct tty_struct *tty = info->port.tty; struct mgsl_icount *icount = &info->icount; unsigned int start, end; unsigned char *p; @@ -2057,7 +2043,7 @@ static void bh_handler(struct work_struct *work) static void bh_transmit(struct slgt_info *info) { - struct tty_struct *tty = info->tty; + struct tty_struct *tty = info->port.tty; DBGBH(("%s bh_transmit\n", info->device_name)); if (tty) @@ -2103,17 +2089,17 @@ static void cts_change(struct slgt_info *info, unsigned short status) wake_up_interruptible(&info->event_wait_q); info->pending_bh |= BH_STATUS; - if (info->flags & ASYNC_CTS_FLOW) { - if (info->tty) { - if (info->tty->hw_stopped) { + if (info->port.flags & ASYNC_CTS_FLOW) { + if (info->port.tty) { + if (info->port.tty->hw_stopped) { if (info->signals & SerialSignal_CTS) { - info->tty->hw_stopped = 0; + info->port.tty->hw_stopped = 0; info->pending_bh |= BH_TRANSMIT; return; } } else { if (!(info->signals & SerialSignal_CTS)) - info->tty->hw_stopped = 1; + info->port.tty->hw_stopped = 1; } } } @@ -2146,12 +2132,12 @@ static void dcd_change(struct slgt_info *info, unsigned short status) wake_up_interruptible(&info->event_wait_q); info->pending_bh |= BH_STATUS; - if (info->flags & ASYNC_CHECK_CD) { + if (info->port.flags & ASYNC_CHECK_CD) { if (info->signals & SerialSignal_DCD) - wake_up_interruptible(&info->open_wait); + wake_up_interruptible(&info->port.open_wait); else { - if (info->tty) - tty_hangup(info->tty); + if (info->port.tty) + tty_hangup(info->port.tty); } } } @@ -2194,12 +2180,12 @@ static void isr_serial(struct slgt_info *info) if ((status & IRQ_RXBREAK) && (status & RXBREAK)) { info->icount.brk++; /* process break detection if tty control allows */ - if (info->tty) { + if (info->port.tty) { if (!(status & info->ignore_status_mask)) { if (info->read_status_mask & MASK_BREAK) { - tty_insert_flip_char(info->tty, 0, TTY_BREAK); - if (info->flags & ASYNC_SAK) - do_SAK(info->tty); + tty_insert_flip_char(info->port.tty, 0, TTY_BREAK); + if (info->port.flags & ASYNC_SAK) + do_SAK(info->port.tty); } } } @@ -2319,7 +2305,7 @@ static void isr_txeom(struct slgt_info *info, unsigned short status) else #endif { - if (info->tty && (info->tty->stopped || info->tty->hw_stopped)) { + if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) { tx_stop(info); return; } @@ -2395,7 +2381,7 @@ static irqreturn_t slgt_interrupt(int dummy, void *dev_id) for(i=0; i < info->port_count ; i++) { struct slgt_info *port = info->port_array[i]; - if (port && (port->count || port->netcount) && + if (port && (port->port.count || port->netcount) && port->pending_bh && !port->bh_running && !port->bh_requested) { DBGISR(("%s bh queued\n", port->device_name)); @@ -2414,7 +2400,7 @@ static int startup(struct slgt_info *info) { DBGINFO(("%s startup\n", info->device_name)); - if (info->flags & ASYNC_INITIALIZED) + if (info->port.flags & ASYNC_INITIALIZED) return 0; if (!info->tx_buf) { @@ -2432,10 +2418,10 @@ static int startup(struct slgt_info *info) /* program hardware for current parameters */ change_params(info); - if (info->tty) - clear_bit(TTY_IO_ERROR, &info->tty->flags); + if (info->port.tty) + clear_bit(TTY_IO_ERROR, &info->port.tty->flags); - info->flags |= ASYNC_INITIALIZED; + info->port.flags |= ASYNC_INITIALIZED; return 0; } @@ -2447,7 +2433,7 @@ static void shutdown(struct slgt_info *info) { unsigned long flags; - if (!(info->flags & ASYNC_INITIALIZED)) + if (!(info->port.flags & ASYNC_INITIALIZED)) return; DBGINFO(("%s shutdown\n", info->device_name)); @@ -2470,7 +2456,7 @@ static void shutdown(struct slgt_info *info) slgt_irq_off(info, IRQ_ALL | IRQ_MASTER); - if (!info->tty || info->tty->termios->c_cflag & HUPCL) { + if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) { info->signals &= ~(SerialSignal_DTR + SerialSignal_RTS); set_signals(info); } @@ -2479,10 +2465,10 @@ static void shutdown(struct slgt_info *info) spin_unlock_irqrestore(&info->lock,flags); - if (info->tty) - set_bit(TTY_IO_ERROR, &info->tty->flags); + if (info->port.tty) + set_bit(TTY_IO_ERROR, &info->port.tty->flags); - info->flags &= ~ASYNC_INITIALIZED; + info->port.flags &= ~ASYNC_INITIALIZED; } static void program_hw(struct slgt_info *info) @@ -2511,7 +2497,7 @@ static void program_hw(struct slgt_info *info) get_signals(info); if (info->netcount || - (info->tty && info->tty->termios->c_cflag & CREAD)) + (info->port.tty && info->port.tty->termios->c_cflag & CREAD)) rx_start(info); spin_unlock_irqrestore(&info->lock,flags); @@ -2525,11 +2511,11 @@ static void change_params(struct slgt_info *info) unsigned cflag; int bits_per_char; - if (!info->tty || !info->tty->termios) + if (!info->port.tty || !info->port.tty->termios) return; DBGINFO(("%s change_params\n", info->device_name)); - cflag = info->tty->termios->c_cflag; + cflag = info->port.tty->termios->c_cflag; /* if B0 rate (hangup) specified then negate DTR and RTS */ /* otherwise assert DTR and RTS */ @@ -2561,7 +2547,7 @@ static void change_params(struct slgt_info *info) bits_per_char = info->params.data_bits + info->params.stop_bits + 1; - info->params.data_rate = tty_get_baud_rate(info->tty); + info->params.data_rate = tty_get_baud_rate(info->port.tty); if (info->params.data_rate) { info->timeout = (32*HZ*bits_per_char) / @@ -2570,30 +2556,30 @@ static void change_params(struct slgt_info *info) info->timeout += HZ/50; /* Add .02 seconds of slop */ if (cflag & CRTSCTS) - info->flags |= ASYNC_CTS_FLOW; + info->port.flags |= ASYNC_CTS_FLOW; else - info->flags &= ~ASYNC_CTS_FLOW; + info->port.flags &= ~ASYNC_CTS_FLOW; if (cflag & CLOCAL) - info->flags &= ~ASYNC_CHECK_CD; + info->port.flags &= ~ASYNC_CHECK_CD; else - info->flags |= ASYNC_CHECK_CD; + info->port.flags |= ASYNC_CHECK_CD; /* process tty input control flags */ info->read_status_mask = IRQ_RXOVER; - if (I_INPCK(info->tty)) + if (I_INPCK(info->port.tty)) info->read_status_mask |= MASK_PARITY | MASK_FRAMING; - if (I_BRKINT(info->tty) || I_PARMRK(info->tty)) + if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty)) info->read_status_mask |= MASK_BREAK; - if (I_IGNPAR(info->tty)) + if (I_IGNPAR(info->port.tty)) info->ignore_status_mask |= MASK_PARITY | MASK_FRAMING; - if (I_IGNBRK(info->tty)) { + if (I_IGNBRK(info->port.tty)) { info->ignore_status_mask |= MASK_BREAK; /* If ignoring parity and break indicators, ignore * overruns too. (For real raw support). */ - if (I_IGNPAR(info->tty)) + if (I_IGNPAR(info->port.tty)) info->ignore_status_mask |= MASK_OVERRUN; } @@ -2690,8 +2676,31 @@ static int tx_abort(struct slgt_info *info) static int rx_enable(struct slgt_info *info, int enable) { unsigned long flags; - DBGINFO(("%s rx_enable(%d)\n", info->device_name, enable)); + unsigned int rbuf_fill_level; + DBGINFO(("%s rx_enable(%08x)\n", info->device_name, enable)); spin_lock_irqsave(&info->lock,flags); + /* + * enable[31..16] = receive DMA buffer fill level + * 0 = noop (leave fill level unchanged) + * fill level must be multiple of 4 and <= buffer size + */ + rbuf_fill_level = ((unsigned int)enable) >> 16; + if (rbuf_fill_level) { + if ((rbuf_fill_level > DMABUFSIZE) || (rbuf_fill_level % 4)) { + spin_unlock_irqrestore(&info->lock, flags); + return -EINVAL; + } + info->rbuf_fill_level = rbuf_fill_level; + rx_stop(info); /* restart receiver to use new fill level */ + } + + /* + * enable[1..0] = receiver enable command + * 0 = disable + * 1 = enable + * 2 = enable or force hunt mode if already enabled + */ + enable &= 3; if (enable) { if (!info->rx_enabled) rx_start(info); @@ -3144,7 +3153,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){ /* nonblock mode is set or port is not enabled */ - info->flags |= ASYNC_NORMAL_ACTIVE; + info->port.flags |= ASYNC_NORMAL_ACTIVE; return 0; } @@ -3153,21 +3162,21 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, /* Wait for carrier detect and the line to become * free (i.e., not in use by the callout). While we are in - * this loop, info->count is dropped by one, so that + * this loop, info->port.count is dropped by one, so that * close() knows when to free things. We restore it upon * exit, either normal or abnormal. */ retval = 0; - add_wait_queue(&info->open_wait, &wait); + add_wait_queue(&info->port.open_wait, &wait); spin_lock_irqsave(&info->lock, flags); if (!tty_hung_up_p(filp)) { extra_count = true; - info->count--; + info->port.count--; } spin_unlock_irqrestore(&info->lock, flags); - info->blocked_open++; + info->port.blocked_open++; while (1) { if ((tty->termios->c_cflag & CBAUD)) { @@ -3179,8 +3188,8 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, set_current_state(TASK_INTERRUPTIBLE); - if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)){ - retval = (info->flags & ASYNC_HUP_NOTIFY) ? + if (tty_hung_up_p(filp) || !(info->port.flags & ASYNC_INITIALIZED)){ + retval = (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS; break; } @@ -3189,7 +3198,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, get_signals(info); spin_unlock_irqrestore(&info->lock,flags); - if (!(info->flags & ASYNC_CLOSING) && + if (!(info->port.flags & ASYNC_CLOSING) && (do_clocal || (info->signals & SerialSignal_DCD)) ) { break; } @@ -3204,14 +3213,14 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, } set_current_state(TASK_RUNNING); - remove_wait_queue(&info->open_wait, &wait); + remove_wait_queue(&info->port.open_wait, &wait); if (extra_count) - info->count++; - info->blocked_open--; + info->port.count++; + info->port.blocked_open--; if (!retval) - info->flags |= ASYNC_NORMAL_ACTIVE; + info->port.flags |= ASYNC_NORMAL_ACTIVE; DBGINFO(("%s block_til_ready ready, rc=%d\n", tty->driver->name, retval)); return retval; @@ -3454,14 +3463,13 @@ static struct slgt_info *alloc_dev(int adapter_num, int port_num, struct pci_dev DBGERR(("%s device alloc failed adapter=%d port=%d\n", driver_name, adapter_num, port_num)); } else { + tty_port_init(&info->port); info->magic = MGSL_MAGIC; INIT_WORK(&info->task, bh_handler); info->max_frame_size = 4096; - info->raw_rx_size = DMABUFSIZE; - info->close_delay = 5*HZ/10; - info->closing_wait = 30*HZ; - init_waitqueue_head(&info->open_wait); - init_waitqueue_head(&info->close_wait); + info->rbuf_fill_level = DMABUFSIZE; + info->port.close_delay = 5*HZ/10; + info->port.closing_wait = 30*HZ; init_waitqueue_head(&info->status_event_wait_q); init_waitqueue_head(&info->event_wait_q); spin_lock_init(&info->netlock); @@ -3946,15 +3954,7 @@ static void tdma_start(struct slgt_info *info) /* set 1st descriptor address */ wr_reg32(info, TDDAR, info->tbufs[info->tbuf_start].pdesc); - switch(info->params.mode) { - case MGSL_MODE_RAW: - case MGSL_MODE_MONOSYNC: - case MGSL_MODE_BISYNC: - wr_reg32(info, TDCSR, BIT2 + BIT0); /* IRQ + DMA enable */ - break; - default: - wr_reg32(info, TDCSR, BIT0); /* DMA enable */ - } + wr_reg32(info, TDCSR, BIT2 + BIT0); /* IRQ + DMA enable */ } static void tx_stop(struct slgt_info *info) @@ -4157,7 +4157,7 @@ static void sync_mode(struct slgt_info *info) * 01 enable * 00 auto-CTS enable */ - val = 0; + val = BIT2; switch(info->params.mode) { case MGSL_MODE_MONOSYNC: val |= BIT14 + BIT13; break; @@ -4430,6 +4430,8 @@ static void msc_set_vcr(struct slgt_info *info) break; } + if (info->if_mode & MGSL_INTERFACE_MSB_FIRST) + val |= BIT4; if (info->signals & SerialSignal_DTR) val |= BIT3; if (info->signals & SerialSignal_RTS) @@ -4468,16 +4470,7 @@ static void free_rbufs(struct slgt_info *info, unsigned int i, unsigned int last while(!done) { /* reset current buffer for reuse */ info->rbufs[i].status = 0; - switch(info->params.mode) { - case MGSL_MODE_RAW: - case MGSL_MODE_MONOSYNC: - case MGSL_MODE_BISYNC: - set_desc_count(info->rbufs[i], info->raw_rx_size); - break; - default: - set_desc_count(info->rbufs[i], DMABUFSIZE); - } - + set_desc_count(info->rbufs[i], info->rbuf_fill_level); if (i == last) done = 1; if (++i == info->rbuf_count) @@ -4505,7 +4498,7 @@ static bool rx_get_frame(struct slgt_info *info) unsigned short status; unsigned int framesize = 0; unsigned long flags; - struct tty_struct *tty = info->tty; + struct tty_struct *tty = info->port.tty; unsigned char addr_field = 0xff; unsigned int crc_size = 0; @@ -4577,15 +4570,14 @@ check_again: #if SYNCLINK_GENERIC_HDLC if (framesize == 0) { - struct net_device_stats *stats = hdlc_stats(info->netdev); - stats->rx_errors++; - stats->rx_frame_errors++; + info->netdev->stats.rx_errors++; + info->netdev->stats.rx_frame_errors++; } #endif DBGBH(("%s rx frame status=%04X size=%d\n", info->device_name, status, framesize)); - DBGDATA(info, info->rbufs[start].buf, min_t(int, framesize, DMABUFSIZE), "rx"); + DBGDATA(info, info->rbufs[start].buf, min_t(int, framesize, info->rbuf_fill_level), "rx"); if (framesize) { if (!(info->params.crc_type & HDLC_CRC_RETURN_EX)) { @@ -4605,7 +4597,7 @@ check_again: info->icount.rxok++; while(copy_count) { - int partial_count = min(copy_count, DMABUFSIZE); + int partial_count = min_t(int, copy_count, info->rbuf_fill_level); memcpy(p, info->rbufs[i].buf, partial_count); p += partial_count; copy_count -= partial_count; @@ -4656,7 +4648,7 @@ static bool rx_get_buf(struct slgt_info *info) DBGDATA(info, info->rbufs[i].buf, count, "rx"); DBGINFO(("rx_get_buf size=%d\n", count)); if (count) - ldisc_receive_buf(info->tty, info->rbufs[i].buf, + ldisc_receive_buf(info->port.tty, info->rbufs[i].buf, info->flag_buf, count); free_rbufs(info, i, i); return true; @@ -4697,6 +4689,56 @@ static unsigned int free_tbuf_count(struct slgt_info *info) } /* + * return number of bytes in unsent transmit DMA buffers + * and the serial controller tx FIFO + */ +static unsigned int tbuf_bytes(struct slgt_info *info) +{ + unsigned int total_count = 0; + unsigned int i = info->tbuf_current; + unsigned int reg_value; + unsigned int count; + unsigned int active_buf_count = 0; + + /* + * Add descriptor counts for all tx DMA buffers. + * If count is zero (cleared by DMA controller after read), + * the buffer is complete or is actively being read from. + * + * Record buf_count of last buffer with zero count starting + * from current ring position. buf_count is mirror + * copy of count and is not cleared by serial controller. + * If DMA controller is active, that buffer is actively + * being read so add to total. + */ + do { + count = desc_count(info->tbufs[i]); + if (count) + total_count += count; + else if (!total_count) + active_buf_count = info->tbufs[i].buf_count; + if (++i == info->tbuf_count) + i = 0; + } while (i != info->tbuf_current); + + /* read tx DMA status register */ + reg_value = rd_reg32(info, TDCSR); + + /* if tx DMA active, last zero count buffer is in use */ + if (reg_value & BIT0) + total_count += active_buf_count; + + /* add tx FIFO count = reg_value[15..8] */ + total_count += (reg_value >> 8) & 0xff; + + /* if transmitter active add one byte for shift register */ + if (info->tx_active) + total_count++; + + return total_count; +} + +/* * load transmit DMA buffer(s) with data */ static void tx_load(struct slgt_info *info, const char *buf, unsigned int size) @@ -4734,6 +4776,7 @@ static void tx_load(struct slgt_info *info, const char *buf, unsigned int size) set_desc_eof(*d, 0); set_desc_count(*d, count); + d->buf_count = count; } info->tbuf_current = i; @@ -4765,11 +4808,11 @@ static int irq_test(struct slgt_info *info) { unsigned long timeout; unsigned long flags; - struct tty_struct *oldtty = info->tty; + struct tty_struct *oldtty = info->port.tty; u32 speed = info->params.data_rate; info->params.data_rate = 921600; - info->tty = NULL; + info->port.tty = NULL; spin_lock_irqsave(&info->lock, flags); async_mode(info); @@ -4797,7 +4840,7 @@ static int irq_test(struct slgt_info *info) spin_unlock_irqrestore(&info->lock,flags); info->params.data_rate = speed; - info->tty = oldtty; + info->port.tty = oldtty; info->init_error = info->irq_occurred ? 0 : DiagStatus_IrqFailure; return info->irq_occurred ? 0 : -ENODEV; @@ -4837,7 +4880,7 @@ static int loopback_test(struct slgt_info *info) int rc = -ENODEV; unsigned long flags; - struct tty_struct *oldtty = info->tty; + struct tty_struct *oldtty = info->port.tty; MGSL_PARAMS params; memcpy(¶ms, &info->params, sizeof(params)); @@ -4845,7 +4888,7 @@ static int loopback_test(struct slgt_info *info) info->params.mode = MGSL_MODE_ASYNC; info->params.data_rate = 921600; info->params.loopback = 1; - info->tty = NULL; + info->port.tty = NULL; /* build and send transmit frame */ for (count = 0; count < TESTFRAMESIZE; ++count) @@ -4883,7 +4926,7 @@ static int loopback_test(struct slgt_info *info) spin_unlock_irqrestore(&info->lock,flags); memcpy(&info->params, ¶ms, sizeof(info->params)); - info->tty = oldtty; + info->port.tty = oldtty; info->init_error = rc ? DiagStatus_DmaFailure : 0; return rc; |