From f1d03228ea85877584d41bccf62841e7ca47043c Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Wed, 16 Jul 2008 21:55:45 +0100 Subject: [PATCH] isicom: use tty_port Switch isicom to use a tty_port structure for some fields Signed-off-by: Alan Cox Signed-off-by: Linus Torvalds --- drivers/char/isicom.c | 181 ++++++++++++++++++------------------------ 1 file changed, 79 insertions(+), 102 deletions(-) diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c index a1a67e3d52cc..5a53c15b0dc2 100644 --- a/drivers/char/isicom.c +++ b/drivers/char/isicom.c @@ -198,17 +198,12 @@ struct isi_board { struct isi_port { unsigned short magic; - unsigned int flags; - int count; - int blocked_open; + struct tty_port port; int close_delay; u16 channel; u16 status; u16 closing_wait; struct isi_board *card; - struct tty_struct *tty; - wait_queue_head_t close_wait; - wait_queue_head_t open_wait; unsigned char *xmit_buf; int xmit_head; int xmit_tail; @@ -430,11 +425,11 @@ static void isicom_tx(unsigned long _data) for (; count > 0; count--, port++) { /* port not active or tx disabled to force flow control */ - if (!(port->flags & ASYNC_INITIALIZED) || + if (!(port->port.flags & ASYNC_INITIALIZED) || !(port->status & ISI_TXOK)) continue; - tty = port->tty; + tty = port->port.tty; if (tty == NULL) continue; @@ -458,7 +453,7 @@ static void isicom_tx(unsigned long _data) if (residue == YES) { residue = NO; if (cnt > 0) { - wrd |= (port->xmit_buf[port->xmit_tail] + wrd |= (port->port.xmit_buf[port->xmit_tail] << 8); port->xmit_tail = (port->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1); @@ -474,14 +469,14 @@ static void isicom_tx(unsigned long _data) if (cnt <= 0) break; word_count = cnt >> 1; - outsw(base, port->xmit_buf+port->xmit_tail, word_count); + outsw(base, port->port.xmit_buf+port->xmit_tail, word_count); port->xmit_tail = (port->xmit_tail + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1); txcount -= (word_count << 1); port->xmit_cnt -= (word_count << 1); if (cnt & 0x0001) { residue = YES; - wrd = port->xmit_buf[port->xmit_tail]; + wrd = port->port.xmit_buf[port->xmit_tail]; port->xmit_tail = (port->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1); port->xmit_cnt--; @@ -548,13 +543,13 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id) return IRQ_HANDLED; } port = card->ports + channel; - if (!(port->flags & ASYNC_INITIALIZED)) { + if (!(port->port.flags & ASYNC_INITIALIZED)) { outw(0x0000, base+0x04); /* enable interrupts */ spin_unlock(&card->card_lock); return IRQ_HANDLED; } - tty = port->tty; + tty = port->port.tty; if (tty == NULL) { word_count = byte_count >> 1; while (byte_count > 1) { @@ -572,7 +567,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id) header = inw(base); switch (header & 0xff) { case 0: /* Change in EIA signals */ - if (port->flags & ASYNC_CHECK_CD) { + if (port->port.flags & ASYNC_CHECK_CD) { if (port->status & ISI_DCD) { if (!(header & ISI_DCD)) { /* Carrier has been lost */ @@ -585,7 +580,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id) /* Carrier has been detected */ pr_dbg("interrupt: DCD->high.\n"); port->status |= ISI_DCD; - wake_up_interruptible(&port->open_wait); + wake_up_interruptible(&port->port.open_wait); } } else { if (header & ISI_DCD) @@ -594,17 +589,17 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id) port->status &= ~ISI_DCD; } - if (port->flags & ASYNC_CTS_FLOW) { - if (port->tty->hw_stopped) { + if (port->port.flags & ASYNC_CTS_FLOW) { + if (port->port.tty->hw_stopped) { if (header & ISI_CTS) { - port->tty->hw_stopped = 0; + port->port.tty->hw_stopped = 0; /* start tx ing */ port->status |= (ISI_TXOK | ISI_CTS); tty_wakeup(tty); } } else if (!(header & ISI_CTS)) { - port->tty->hw_stopped = 1; + port->port.tty->hw_stopped = 1; /* stop tx ing */ port->status &= ~(ISI_TXOK | ISI_CTS); } @@ -629,7 +624,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id) case 1: /* Received Break !!! */ tty_insert_flip_char(tty, 0, TTY_BREAK); - if (port->flags & ASYNC_SAK) + if (port->port.flags & ASYNC_SAK) do_SAK(tty); tty_flip_buffer_push(tty); break; @@ -681,7 +676,7 @@ static void isicom_config_port(struct isi_port *port) shift_count = card->shift_count; unsigned char flow_ctrl; - tty = port->tty; + tty = port->port.tty; if (tty == NULL) return; @@ -697,7 +692,7 @@ static void isicom_config_port(struct isi_port *port) /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */ if (baud < 1 || baud > 4) - port->tty->termios->c_cflag &= ~CBAUDEX; + port->port.tty->termios->c_cflag &= ~CBAUDEX; else baud += 15; } @@ -708,13 +703,13 @@ static void isicom_config_port(struct isi_port *port) * the 'setserial' utility. */ - if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) + if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) baud++; /* 57.6 Kbps */ - if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) + if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) baud += 2; /* 115 Kbps */ - if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) + if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) baud += 3; /* 230 kbps*/ - if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) + if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) baud += 4; /* 460 kbps*/ } if (linuxb_to_isib[baud] == -1) { @@ -754,15 +749,15 @@ static void isicom_config_port(struct isi_port *port) InterruptTheCard(base); } if (C_CLOCAL(tty)) - port->flags &= ~ASYNC_CHECK_CD; + port->port.flags &= ~ASYNC_CHECK_CD; else - port->flags |= ASYNC_CHECK_CD; + port->port.flags |= ASYNC_CHECK_CD; /* flow control settings ...*/ flow_ctrl = 0; - port->flags &= ~ASYNC_CTS_FLOW; + port->port.flags &= ~ASYNC_CTS_FLOW; if (C_CRTSCTS(tty)) { - port->flags |= ASYNC_CTS_FLOW; + port->port.flags |= ASYNC_CTS_FLOW; flow_ctrl |= ISICOM_CTSRTS; } if (I_IXON(tty)) @@ -809,23 +804,15 @@ static int isicom_setup_port(struct isi_port *port) struct isi_board *card = port->card; unsigned long flags; - if (port->flags & ASYNC_INITIALIZED) + if (port->port.flags & ASYNC_INITIALIZED) return 0; - if (!port->xmit_buf) { - /* Relies on BKL */ - unsigned long page = get_zeroed_page(GFP_KERNEL); - if (page == 0) - return -ENOMEM; - if (port->xmit_buf) - free_page(page); - else - port->xmit_buf = (unsigned char *) page; - } + if (tty_port_alloc_xmit_buf(&port->port) < 0) + return -ENOMEM; spin_lock_irqsave(&card->card_lock, flags); - if (port->tty) - clear_bit(TTY_IO_ERROR, &port->tty->flags); - if (port->count == 1) + if (port->port.tty) + clear_bit(TTY_IO_ERROR, &port->port.tty->flags); + if (port->port.count == 1) card->count++; port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; @@ -839,7 +826,7 @@ static int isicom_setup_port(struct isi_port *port) } isicom_config_port(port); - port->flags |= ASYNC_INITIALIZED; + port->port.flags |= ASYNC_INITIALIZED; spin_unlock_irqrestore(&card->card_lock, flags); return 0; @@ -855,10 +842,10 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, /* block if port is in the process of being closed */ - if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { + if (tty_hung_up_p(filp) || port->port.flags & ASYNC_CLOSING) { pr_dbg("block_til_ready: close in progress.\n"); - interruptible_sleep_on(&port->close_wait); - if (port->flags & ASYNC_HUP_NOTIFY) + interruptible_sleep_on(&port->port.close_wait); + if (port->port.flags & ASYNC_HUP_NOTIFY) return -EAGAIN; else return -ERESTARTSYS; @@ -869,7 +856,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) { pr_dbg("block_til_ready: non-block mode.\n"); - port->flags |= ASYNC_NORMAL_ACTIVE; + port->port.flags |= ASYNC_NORMAL_ACTIVE; return 0; } @@ -879,26 +866,26 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, /* block waiting for DCD to be asserted, and while callout dev is busy */ retval = 0; - add_wait_queue(&port->open_wait, &wait); + add_wait_queue(&port->port.open_wait, &wait); spin_lock_irqsave(&card->card_lock, flags); if (!tty_hung_up_p(filp)) - port->count--; - port->blocked_open++; + port->port.count--; + port->port.blocked_open++; spin_unlock_irqrestore(&card->card_lock, flags); while (1) { raise_dtr_rts(port); set_current_state(TASK_INTERRUPTIBLE); - if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) { - if (port->flags & ASYNC_HUP_NOTIFY) + if (tty_hung_up_p(filp) || !(port->port.flags & ASYNC_INITIALIZED)) { + if (port->port.flags & ASYNC_HUP_NOTIFY) retval = -EAGAIN; else retval = -ERESTARTSYS; break; } - if (!(port->flags & ASYNC_CLOSING) && + if (!(port->port.flags & ASYNC_CLOSING) && (do_clocal || (port->status & ISI_DCD))) { break; } @@ -909,15 +896,15 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, schedule(); } set_current_state(TASK_RUNNING); - remove_wait_queue(&port->open_wait, &wait); + remove_wait_queue(&port->port.open_wait, &wait); spin_lock_irqsave(&card->card_lock, flags); if (!tty_hung_up_p(filp)) - port->count++; - port->blocked_open--; + port->port.count++; + port->port.blocked_open--; spin_unlock_irqrestore(&card->card_lock, flags); if (retval) return retval; - port->flags |= ASYNC_NORMAL_ACTIVE; + port->port.flags |= ASYNC_NORMAL_ACTIVE; return 0; } @@ -947,9 +934,9 @@ static int isicom_open(struct tty_struct *tty, struct file *filp) isicom_setup_board(card); - port->count++; + port->port.count++; tty->driver_data = port; - port->tty = tty; + port->port.tty = tty; error = isicom_setup_port(port); if (error == 0) error = block_til_ready(tty, filp, port); @@ -970,18 +957,15 @@ static void isicom_shutdown_port(struct isi_port *port) struct isi_board *card = port->card; struct tty_struct *tty; - tty = port->tty; + tty = port->port.tty; - if (!(port->flags & ASYNC_INITIALIZED)) + if (!(port->port.flags & ASYNC_INITIALIZED)) return; - if (port->xmit_buf) { - free_page((unsigned long) port->xmit_buf); - port->xmit_buf = NULL; - } - port->flags &= ~ASYNC_INITIALIZED; + tty_port_free_xmit_buf(&port->port); + port->port.flags &= ~ASYNC_INITIALIZED; /* 3rd October 2000 : Vinayak P Risbud */ - port->tty = NULL; + port->port.tty = NULL; /*Fix done by Anil .S on 30-04-2001 remote login through isi port has dtr toggle problem @@ -1046,24 +1030,24 @@ static void isicom_close(struct tty_struct *tty, struct file *filp) return; } - if (tty->count == 1 && port->count != 1) { + if (tty->count == 1 && port->port.count != 1) { printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port " "count tty->count = 1 port count = %d.\n", - card->base, port->count); - port->count = 1; + card->base, port->port.count); + port->port.count = 1; } - if (--port->count < 0) { + if (--port->port.count < 0) { printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port " "count for channel%d = %d", card->base, port->channel, - port->count); - port->count = 0; + port->port.count); + port->port.count = 0; } - if (port->count) { + if (port->port.count) { spin_unlock_irqrestore(&card->card_lock, flags); return; } - port->flags |= ASYNC_CLOSING; + port->port.flags |= ASYNC_CLOSING; tty->closing = 1; spin_unlock_irqrestore(&card->card_lock, flags); @@ -1072,7 +1056,7 @@ static void isicom_close(struct tty_struct *tty, struct file *filp) /* indicate to the card that no more data can be received on this port */ spin_lock_irqsave(&card->card_lock, flags); - if (port->flags & ASYNC_INITIALIZED) { + if (port->port.flags & ASYNC_INITIALIZED) { card->port_status &= ~(1 << port->channel); outw(card->port_status, card->base + 0x02); } @@ -1085,7 +1069,7 @@ static void isicom_close(struct tty_struct *tty, struct file *filp) spin_lock_irqsave(&card->card_lock, flags); tty->closing = 0; - if (port->blocked_open) { + if (port->port.blocked_open) { spin_unlock_irqrestore(&card->card_lock, flags); if (port->close_delay) { pr_dbg("scheduling until time out.\n"); @@ -1093,10 +1077,10 @@ static void isicom_close(struct tty_struct *tty, struct file *filp) jiffies_to_msecs(port->close_delay)); } spin_lock_irqsave(&card->card_lock, flags); - wake_up_interruptible(&port->open_wait); + wake_up_interruptible(&port->port.open_wait); } - port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); - wake_up_interruptible(&port->close_wait); + port->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); + wake_up_interruptible(&port->port.close_wait); spin_unlock_irqrestore(&card->card_lock, flags); } @@ -1112,9 +1096,6 @@ static int isicom_write(struct tty_struct *tty, const unsigned char *buf, if (isicom_paranoia_check(port, tty->name, "isicom_write")) return 0; - if (!port->xmit_buf) - return 0; - spin_lock_irqsave(&card->card_lock, flags); while (1) { @@ -1123,7 +1104,7 @@ static int isicom_write(struct tty_struct *tty, const unsigned char *buf, if (cnt <= 0) break; - memcpy(port->xmit_buf + port->xmit_head, buf, cnt); + memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt); port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE - 1); port->xmit_cnt += cnt; @@ -1147,16 +1128,13 @@ static int isicom_put_char(struct tty_struct *tty, unsigned char ch) if (isicom_paranoia_check(port, tty->name, "isicom_put_char")) return 0; - if (!port->xmit_buf) - return 0; - spin_lock_irqsave(&card->card_lock, flags); if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) { spin_unlock_irqrestore(&card->card_lock, flags); return 0; } - port->xmit_buf[port->xmit_head++] = ch; + port->port.xmit_buf[port->xmit_head++] = ch; port->xmit_head &= (SERIAL_XMIT_SIZE - 1); port->xmit_cnt++; spin_unlock_irqrestore(&card->card_lock, flags); @@ -1172,7 +1150,7 @@ static void isicom_flush_chars(struct tty_struct *tty) return; if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || - !port->xmit_buf) + !port->port.xmit_buf) return; /* this tells the transmitter to consider this port for @@ -1274,23 +1252,23 @@ static int isicom_set_serial_info(struct isi_port *port, lock_kernel(); - reconfig_port = ((port->flags & ASYNC_SPD_MASK) != + reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) != (newinfo.flags & ASYNC_SPD_MASK)); if (!capable(CAP_SYS_ADMIN)) { if ((newinfo.close_delay != port->close_delay) || (newinfo.closing_wait != port->closing_wait) || ((newinfo.flags & ~ASYNC_USR_MASK) != - (port->flags & ~ASYNC_USR_MASK))) { + (port->port.flags & ~ASYNC_USR_MASK))) { unlock_kernel(); return -EPERM; } - port->flags = ((port->flags & ~ASYNC_USR_MASK) | + port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) | (newinfo.flags & ASYNC_USR_MASK)); } else { port->close_delay = newinfo.close_delay; port->closing_wait = newinfo.closing_wait; - port->flags = ((port->flags & ~ASYNC_FLAGS) | + port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) | (newinfo.flags & ASYNC_FLAGS)); } if (reconfig_port) { @@ -1314,7 +1292,7 @@ static int isicom_get_serial_info(struct isi_port *port, out_info.line = port - isi_ports; out_info.port = port->card->base; out_info.irq = port->card->irq; - out_info.flags = port->flags; + out_info.flags = port->port.flags; /* out_info.baud_base = ? */ out_info.close_delay = port->close_delay; out_info.closing_wait = port->closing_wait; @@ -1454,10 +1432,10 @@ static void isicom_hangup(struct tty_struct *tty) isicom_shutdown_port(port); spin_unlock_irqrestore(&port->card->card_lock, flags); - port->count = 0; - port->flags &= ~ASYNC_NORMAL_ACTIVE; - port->tty = NULL; - wake_up_interruptible(&port->open_wait); + port->port.count = 0; + port->port.flags &= ~ASYNC_NORMAL_ACTIVE; + port->port.tty = NULL; + wake_up_interruptible(&port->port.open_wait); } @@ -1832,8 +1810,7 @@ static int __init isicom_init(void) port->close_delay = 50 * HZ/100; port->closing_wait = 3000 * HZ/100; port->status = 0; - init_waitqueue_head(&port->open_wait); - init_waitqueue_head(&port->close_wait); + tty_port_init(&port->port); /* . . . */ } isi_card[idx].base = 0; -- GitLab