| /* |
| * linux/drivers/char/riscom.c -- RISCom/8 multiport serial driver. |
| * |
| * Copyright (C) 1994-1996 Dmitry Gorodchanin (pgmdsg@ibi.com) |
| * |
| * This code is loosely based on the Linux serial driver, written by |
| * Linus Torvalds, Theodore T'so and others. The RISCom/8 card |
| * programming info was obtained from various drivers for other OSes |
| * (FreeBSD, ISC, etc), but no source code from those drivers were |
| * directly included in this driver. |
| * |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| * |
| * Revision 1.1 |
| * |
| * ChangeLog: |
| * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 27-Jun-2001 |
| * - get rid of check_region and several cleanups |
| */ |
| |
| #include <linux/module.h> |
| |
| #include <linux/io.h> |
| #include <linux/kernel.h> |
| #include <linux/sched.h> |
| #include <linux/ioport.h> |
| #include <linux/interrupt.h> |
| #include <linux/errno.h> |
| #include <linux/tty.h> |
| #include <linux/mm.h> |
| #include <linux/serial.h> |
| #include <linux/fcntl.h> |
| #include <linux/major.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/tty_flip.h> |
| #include <linux/smp_lock.h> |
| #include <linux/spinlock.h> |
| #include <linux/device.h> |
| |
| #include <linux/uaccess.h> |
| |
| #include "riscom8.h" |
| #include "riscom8_reg.h" |
| |
| /* Am I paranoid or not ? ;-) */ |
| #define RISCOM_PARANOIA_CHECK |
| |
| /* |
| * Crazy InteliCom/8 boards sometimes have swapped CTS & DSR signals. |
| * You can slightly speed up things by #undefing the following option, |
| * if you are REALLY sure that your board is correct one. |
| */ |
| |
| #define RISCOM_BRAIN_DAMAGED_CTS |
| |
| /* |
| * The following defines are mostly for testing purposes. But if you need |
| * some nice reporting in your syslog, you can define them also. |
| */ |
| #undef RC_REPORT_FIFO |
| #undef RC_REPORT_OVERRUN |
| |
| |
| #define RISCOM_LEGAL_FLAGS \ |
| (ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \ |
| ASYNC_SPD_HI | ASYNC_SPEED_VHI | ASYNC_SESSION_LOCKOUT | \ |
| ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP) |
| |
| static struct tty_driver *riscom_driver; |
| |
| static DEFINE_SPINLOCK(riscom_lock); |
| |
| static struct riscom_board rc_board[RC_NBOARD] = { |
| { |
| .base = RC_IOBASE1, |
| }, |
| { |
| .base = RC_IOBASE2, |
| }, |
| { |
| .base = RC_IOBASE3, |
| }, |
| { |
| .base = RC_IOBASE4, |
| }, |
| }; |
| |
| static struct riscom_port rc_port[RC_NBOARD * RC_NPORT]; |
| |
| /* RISCom/8 I/O ports addresses (without address translation) */ |
| static unsigned short rc_ioport[] = { |
| #if 1 |
| 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0c, |
| #else |
| 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0c, 0x10, |
| 0x11, 0x12, 0x18, 0x28, 0x31, 0x32, 0x39, 0x3a, 0x40, 0x41, 0x61, 0x62, |
| 0x63, 0x64, 0x6b, 0x70, 0x71, 0x78, 0x7a, 0x7b, 0x7f, 0x100, 0x101 |
| #endif |
| }; |
| #define RC_NIOPORT ARRAY_SIZE(rc_ioport) |
| |
| |
| static int rc_paranoia_check(struct riscom_port const *port, |
| char *name, const char *routine) |
| { |
| #ifdef RISCOM_PARANOIA_CHECK |
| static const char badmagic[] = KERN_INFO |
| "rc: Warning: bad riscom port magic number for device %s in %s\n"; |
| static const char badinfo[] = KERN_INFO |
| "rc: Warning: null riscom port for device %s in %s\n"; |
| |
| if (!port) { |
| printk(badinfo, name, routine); |
| return 1; |
| } |
| if (port->magic != RISCOM8_MAGIC) { |
| printk(badmagic, name, routine); |
| return 1; |
| } |
| #endif |
| return 0; |
| } |
| |
| /* |
| * |
| * Service functions for RISCom/8 driver. |
| * |
| */ |
| |
| /* Get board number from pointer */ |
| static inline int board_No(struct riscom_board const *bp) |
| { |
| return bp - rc_board; |
| } |
| |
| /* Get port number from pointer */ |
| static inline int port_No(struct riscom_port const *port) |
| { |
| return RC_PORT(port - rc_port); |
| } |
| |
| /* Get pointer to board from pointer to port */ |
| static inline struct riscom_board *port_Board(struct riscom_port const *port) |
| { |
| return &rc_board[RC_BOARD(port - rc_port)]; |
| } |
| |
| /* Input Byte from CL CD180 register */ |
| static inline unsigned char rc_in(struct riscom_board const *bp, |
| unsigned short reg) |
| { |
| return inb(bp->base + RC_TO_ISA(reg)); |
| } |
| |
| /* Output Byte to CL CD180 register */ |
| static inline void rc_out(struct riscom_board const *bp, unsigned short reg, |
| unsigned char val) |
| { |
| outb(val, bp->base + RC_TO_ISA(reg)); |
| } |
| |
| /* Wait for Channel Command Register ready */ |
| static void rc_wait_CCR(struct riscom_board const *bp) |
| { |
| unsigned long delay; |
| |
| /* FIXME: need something more descriptive then 100000 :) */ |
| for (delay = 100000; delay; delay--) |
| if (!rc_in(bp, CD180_CCR)) |
| return; |
| |
| printk(KERN_INFO "rc%d: Timeout waiting for CCR.\n", board_No(bp)); |
| } |
| |
| /* |
| * RISCom/8 probe functions. |
| */ |
| |
| static int rc_request_io_range(struct riscom_board * const bp) |
| { |
| int i; |
| |
| for (i = 0; i < RC_NIOPORT; i++) |
| if (!request_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1, |
| "RISCom/8")) { |
| goto out_release; |
| } |
| return 0; |
| out_release: |
| printk(KERN_INFO "rc%d: Skipping probe at 0x%03x. IO address in use.\n", |
| board_No(bp), bp->base); |
| while (--i >= 0) |
| release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1); |
| return 1; |
| } |
| |
| static void rc_release_io_range(struct riscom_board * const bp) |
| { |
| int i; |
| |
| for (i = 0; i < RC_NIOPORT; i++) |
| release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1); |
| } |
| |
| /* Reset and setup CD180 chip */ |
| static void __init rc_init_CD180(struct riscom_board const *bp) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&riscom_lock, flags); |
| |
| rc_out(bp, RC_CTOUT, 0); /* Clear timeout */ |
| rc_wait_CCR(bp); /* Wait for CCR ready */ |
| rc_out(bp, CD180_CCR, CCR_HARDRESET); /* Reset CD180 chip */ |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| msleep(50); /* Delay 0.05 sec */ |
| spin_lock_irqsave(&riscom_lock, flags); |
| rc_out(bp, CD180_GIVR, RC_ID); /* Set ID for this chip */ |
| rc_out(bp, CD180_GICR, 0); /* Clear all bits */ |
| rc_out(bp, CD180_PILR1, RC_ACK_MINT); /* Prio for modem intr */ |
| rc_out(bp, CD180_PILR2, RC_ACK_TINT); /* Prio for tx intr */ |
| rc_out(bp, CD180_PILR3, RC_ACK_RINT); /* Prio for rx intr */ |
| |
| /* Setting up prescaler. We need 4 ticks per 1 ms */ |
| rc_out(bp, CD180_PPRH, (RC_OSCFREQ/(1000000/RISCOM_TPS)) >> 8); |
| rc_out(bp, CD180_PPRL, (RC_OSCFREQ/(1000000/RISCOM_TPS)) & 0xff); |
| |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| } |
| |
| /* Main probing routine, also sets irq. */ |
| static int __init rc_probe(struct riscom_board *bp) |
| { |
| unsigned char val1, val2; |
| int irqs = 0; |
| int retries; |
| |
| bp->irq = 0; |
| |
| if (rc_request_io_range(bp)) |
| return 1; |
| |
| /* Are the I/O ports here ? */ |
| rc_out(bp, CD180_PPRL, 0x5a); |
| outb(0xff, 0x80); |
| val1 = rc_in(bp, CD180_PPRL); |
| rc_out(bp, CD180_PPRL, 0xa5); |
| outb(0x00, 0x80); |
| val2 = rc_in(bp, CD180_PPRL); |
| |
| if ((val1 != 0x5a) || (val2 != 0xa5)) { |
| printk(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not found.\n", |
| board_No(bp), bp->base); |
| goto out_release; |
| } |
| |
| /* It's time to find IRQ for this board */ |
| for (retries = 0; retries < 5 && irqs <= 0; retries++) { |
| irqs = probe_irq_on(); |
| rc_init_CD180(bp); /* Reset CD180 chip */ |
| rc_out(bp, CD180_CAR, 2); /* Select port 2 */ |
| rc_wait_CCR(bp); |
| rc_out(bp, CD180_CCR, CCR_TXEN); /* Enable transmitter */ |
| rc_out(bp, CD180_IER, IER_TXRDY);/* Enable tx empty intr */ |
| msleep(50); |
| irqs = probe_irq_off(irqs); |
| val1 = rc_in(bp, RC_BSR); /* Get Board Status reg */ |
| val2 = rc_in(bp, RC_ACK_TINT); /* ACK interrupt */ |
| rc_init_CD180(bp); /* Reset CD180 again */ |
| |
| if ((val1 & RC_BSR_TINT) || (val2 != (RC_ID | GIVR_IT_TX))) { |
| printk(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not " |
| "found.\n", board_No(bp), bp->base); |
| goto out_release; |
| } |
| } |
| |
| if (irqs <= 0) { |
| printk(KERN_ERR "rc%d: Can't find IRQ for RISCom/8 board " |
| "at 0x%03x.\n", board_No(bp), bp->base); |
| goto out_release; |
| } |
| bp->irq = irqs; |
| bp->flags |= RC_BOARD_PRESENT; |
| |
| printk(KERN_INFO "rc%d: RISCom/8 Rev. %c board detected at " |
| "0x%03x, IRQ %d.\n", |
| board_No(bp), |
| (rc_in(bp, CD180_GFRCR) & 0x0f) + 'A', /* Board revision */ |
| bp->base, bp->irq); |
| |
| return 0; |
| out_release: |
| rc_release_io_range(bp); |
| return 1; |
| } |
| |
| /* |
| * |
| * Interrupt processing routines. |
| * |
| */ |
| |
| static struct riscom_port *rc_get_port(struct riscom_board const *bp, |
| unsigned char const *what) |
| { |
| unsigned char channel; |
| struct riscom_port *port; |
| |
| channel = rc_in(bp, CD180_GICR) >> GICR_CHAN_OFF; |
| if (channel < CD180_NCH) { |
| port = &rc_port[board_No(bp) * RC_NPORT + channel]; |
| if (port->port.flags & ASYNC_INITIALIZED) |
| return port; |
| } |
| printk(KERN_ERR "rc%d: %s interrupt from invalid port %d\n", |
| board_No(bp), what, channel); |
| return NULL; |
| } |
| |
| static void rc_receive_exc(struct riscom_board const *bp) |
| { |
| struct riscom_port *port; |
| struct tty_struct *tty; |
| unsigned char status; |
| unsigned char ch, flag; |
| |
| port = rc_get_port(bp, "Receive"); |
| if (port == NULL) |
| return; |
| |
| tty = tty_port_tty_get(&port->port); |
| |
| #ifdef RC_REPORT_OVERRUN |
| status = rc_in(bp, CD180_RCSR); |
| if (status & RCSR_OE) |
| port->overrun++; |
| status &= port->mark_mask; |
| #else |
| status = rc_in(bp, CD180_RCSR) & port->mark_mask; |
| #endif |
| ch = rc_in(bp, CD180_RDR); |
| if (!status) |
| goto out; |
| if (status & RCSR_TOUT) { |
| printk(KERN_WARNING "rc%d: port %d: Receiver timeout. " |
| "Hardware problems ?\n", |
| board_No(bp), port_No(port)); |
| goto out; |
| |
| } else if (status & RCSR_BREAK) { |
| printk(KERN_INFO "rc%d: port %d: Handling break...\n", |
| board_No(bp), port_No(port)); |
| flag = TTY_BREAK; |
| if (tty && (port->port.flags & ASYNC_SAK)) |
| do_SAK(tty); |
| |
| } else if (status & RCSR_PE) |
| flag = TTY_PARITY; |
| |
| else if (status & RCSR_FE) |
| flag = TTY_FRAME; |
| |
| else if (status & RCSR_OE) |
| flag = TTY_OVERRUN; |
| else |
| flag = TTY_NORMAL; |
| |
| if (tty) { |
| tty_insert_flip_char(tty, ch, flag); |
| tty_flip_buffer_push(tty); |
| } |
| out: |
| tty_kref_put(tty); |
| } |
| |
| static void rc_receive(struct riscom_board const *bp) |
| { |
| struct riscom_port *port; |
| struct tty_struct *tty; |
| unsigned char count; |
| |
| port = rc_get_port(bp, "Receive"); |
| if (port == NULL) |
| return; |
| |
| tty = tty_port_tty_get(&port->port); |
| |
| count = rc_in(bp, CD180_RDCR); |
| |
| #ifdef RC_REPORT_FIFO |
| port->hits[count > 8 ? 9 : count]++; |
| #endif |
| |
| while (count--) { |
| u8 ch = rc_in(bp, CD180_RDR); |
| if (tty) |
| tty_insert_flip_char(tty, ch, TTY_NORMAL); |
| } |
| if (tty) { |
| tty_flip_buffer_push(tty); |
| tty_kref_put(tty); |
| } |
| } |
| |
| static void rc_transmit(struct riscom_board const *bp) |
| { |
| struct riscom_port *port; |
| struct tty_struct *tty; |
| unsigned char count; |
| |
| port = rc_get_port(bp, "Transmit"); |
| if (port == NULL) |
| return; |
| |
| tty = tty_port_tty_get(&port->port); |
| |
| if (port->IER & IER_TXEMPTY) { |
| /* FIFO drained */ |
| rc_out(bp, CD180_CAR, port_No(port)); |
| port->IER &= ~IER_TXEMPTY; |
| rc_out(bp, CD180_IER, port->IER); |
| goto out; |
| } |
| |
| if ((port->xmit_cnt <= 0 && !port->break_length) |
| || (tty && (tty->stopped || tty->hw_stopped))) { |
| rc_out(bp, CD180_CAR, port_No(port)); |
| port->IER &= ~IER_TXRDY; |
| rc_out(bp, CD180_IER, port->IER); |
| goto out; |
| } |
| |
| if (port->break_length) { |
| if (port->break_length > 0) { |
| if (port->COR2 & COR2_ETC) { |
| rc_out(bp, CD180_TDR, CD180_C_ESC); |
| rc_out(bp, CD180_TDR, CD180_C_SBRK); |
| port->COR2 &= ~COR2_ETC; |
| } |
| count = min_t(int, port->break_length, 0xff); |
| rc_out(bp, CD180_TDR, CD180_C_ESC); |
| rc_out(bp, CD180_TDR, CD180_C_DELAY); |
| rc_out(bp, CD180_TDR, count); |
| port->break_length -= count; |
| if (port->break_length == 0) |
| port->break_length--; |
| } else { |
| rc_out(bp, CD180_TDR, CD180_C_ESC); |
| rc_out(bp, CD180_TDR, CD180_C_EBRK); |
| rc_out(bp, CD180_COR2, port->COR2); |
| rc_wait_CCR(bp); |
| rc_out(bp, CD180_CCR, CCR_CORCHG2); |
| port->break_length = 0; |
| } |
| return; |
| } |
| |
| count = CD180_NFIFO; |
| do { |
| rc_out(bp, CD180_TDR, port->port.xmit_buf[port->xmit_tail++]); |
| port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1); |
| if (--port->xmit_cnt <= 0) |
| break; |
| } while (--count > 0); |
| |
| if (port->xmit_cnt <= 0) { |
| rc_out(bp, CD180_CAR, port_No(port)); |
| port->IER &= ~IER_TXRDY; |
| rc_out(bp, CD180_IER, port->IER); |
| } |
| if (tty && port->xmit_cnt <= port->wakeup_chars) |
| tty_wakeup(tty); |
| out: |
| tty_kref_put(tty); |
| } |
| |
| static void rc_check_modem(struct riscom_board const *bp) |
| { |
| struct riscom_port *port; |
| struct tty_struct *tty; |
| unsigned char mcr; |
| |
| port = rc_get_port(bp, "Modem"); |
| if (port == NULL) |
| return; |
| |
| tty = tty_port_tty_get(&port->port); |
| |
| mcr = rc_in(bp, CD180_MCR); |
| if (mcr & MCR_CDCHG) { |
| if (rc_in(bp, CD180_MSVR) & MSVR_CD) |
| wake_up_interruptible(&port->port.open_wait); |
| else if (tty) |
| tty_hangup(tty); |
| } |
| |
| #ifdef RISCOM_BRAIN_DAMAGED_CTS |
| if (mcr & MCR_CTSCHG) { |
| if (rc_in(bp, CD180_MSVR) & MSVR_CTS) { |
| port->IER |= IER_TXRDY; |
| if (tty) { |
| tty->hw_stopped = 0; |
| if (port->xmit_cnt <= port->wakeup_chars) |
| tty_wakeup(tty); |
| } |
| } else { |
| if (tty) |
| tty->hw_stopped = 1; |
| port->IER &= ~IER_TXRDY; |
| } |
| rc_out(bp, CD180_IER, port->IER); |
| } |
| if (mcr & MCR_DSRCHG) { |
| if (rc_in(bp, CD180_MSVR) & MSVR_DSR) { |
| port->IER |= IER_TXRDY; |
| if (tty) { |
| tty->hw_stopped = 0; |
| if (port->xmit_cnt <= port->wakeup_chars) |
| tty_wakeup(tty); |
| } |
| } else { |
| if (tty) |
| tty->hw_stopped = 1; |
| port->IER &= ~IER_TXRDY; |
| } |
| rc_out(bp, CD180_IER, port->IER); |
| } |
| #endif /* RISCOM_BRAIN_DAMAGED_CTS */ |
| |
| /* Clear change bits */ |
| rc_out(bp, CD180_MCR, 0); |
| tty_kref_put(tty); |
| } |
| |
| /* The main interrupt processing routine */ |
| static irqreturn_t rc_interrupt(int dummy, void *dev_id) |
| { |
| unsigned char status; |
| unsigned char ack; |
| struct riscom_board *bp = dev_id; |
| unsigned long loop = 0; |
| int handled = 0; |
| |
| if (!(bp->flags & RC_BOARD_ACTIVE)) |
| return IRQ_NONE; |
| |
| while ((++loop < 16) && ((status = ~(rc_in(bp, RC_BSR))) & |
| (RC_BSR_TOUT | RC_BSR_TINT | |
| RC_BSR_MINT | RC_BSR_RINT))) { |
| handled = 1; |
| if (status & RC_BSR_TOUT) |
| printk(KERN_WARNING "rc%d: Got timeout. Hardware " |
| "error?\n", board_No(bp)); |
| else if (status & RC_BSR_RINT) { |
| ack = rc_in(bp, RC_ACK_RINT); |
| if (ack == (RC_ID | GIVR_IT_RCV)) |
| rc_receive(bp); |
| else if (ack == (RC_ID | GIVR_IT_REXC)) |
| rc_receive_exc(bp); |
| else |
| printk(KERN_WARNING "rc%d: Bad receive ack " |
| "0x%02x.\n", |
| board_No(bp), ack); |
| } else if (status & RC_BSR_TINT) { |
| ack = rc_in(bp, RC_ACK_TINT); |
| if (ack == (RC_ID | GIVR_IT_TX)) |
| rc_transmit(bp); |
| else |
| printk(KERN_WARNING "rc%d: Bad transmit ack " |
| "0x%02x.\n", |
| board_No(bp), ack); |
| } else /* if (status & RC_BSR_MINT) */ { |
| ack = rc_in(bp, RC_ACK_MINT); |
| if (ack == (RC_ID | GIVR_IT_MODEM)) |
| rc_check_modem(bp); |
| else |
| printk(KERN_WARNING "rc%d: Bad modem ack " |
| "0x%02x.\n", |
| board_No(bp), ack); |
| } |
| rc_out(bp, CD180_EOIR, 0); /* Mark end of interrupt */ |
| rc_out(bp, RC_CTOUT, 0); /* Clear timeout flag */ |
| } |
| return IRQ_RETVAL(handled); |
| } |
| |
| /* |
| * Routines for open & close processing. |
| */ |
| |
| /* Called with disabled interrupts */ |
| static int rc_setup_board(struct riscom_board *bp) |
| { |
| int error; |
| |
| if (bp->flags & RC_BOARD_ACTIVE) |
| return 0; |
| |
| error = request_irq(bp->irq, rc_interrupt, IRQF_DISABLED, |
| "RISCom/8", bp); |
| if (error) |
| return error; |
| |
| rc_out(bp, RC_CTOUT, 0); /* Just in case */ |
| bp->DTR = ~0; |
| rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */ |
| |
| bp->flags |= RC_BOARD_ACTIVE; |
| |
| return 0; |
| } |
| |
| /* Called with disabled interrupts */ |
| static void rc_shutdown_board(struct riscom_board *bp) |
| { |
| if (!(bp->flags & RC_BOARD_ACTIVE)) |
| return; |
| |
| bp->flags &= ~RC_BOARD_ACTIVE; |
| |
| free_irq(bp->irq, NULL); |
| |
| bp->DTR = ~0; |
| rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */ |
| |
| } |
| |
| /* |
| * Setting up port characteristics. |
| * Must be called with disabled interrupts |
| */ |
| static void rc_change_speed(struct tty_struct *tty, struct riscom_board *bp, |
| struct riscom_port *port) |
| { |
| unsigned long baud; |
| long tmp; |
| unsigned char cor1 = 0, cor3 = 0; |
| unsigned char mcor1 = 0, mcor2 = 0; |
| |
| port->IER = 0; |
| port->COR2 = 0; |
| port->MSVR = MSVR_RTS; |
| |
| baud = tty_get_baud_rate(tty); |
| |
| /* Select port on the board */ |
| rc_out(bp, CD180_CAR, port_No(port)); |
| |
| if (!baud) { |
| /* Drop DTR & exit */ |
| bp->DTR |= (1u << port_No(port)); |
| rc_out(bp, RC_DTR, bp->DTR); |
| return; |
| } else { |
| /* Set DTR on */ |
| bp->DTR &= ~(1u << port_No(port)); |
| rc_out(bp, RC_DTR, bp->DTR); |
| } |
| |
| /* |
| * Now we must calculate some speed depended things |
| */ |
| |
| /* Set baud rate for port */ |
| tmp = (((RC_OSCFREQ + baud/2) / baud + |
| CD180_TPC/2) / CD180_TPC); |
| |
| rc_out(bp, CD180_RBPRH, (tmp >> 8) & 0xff); |
| rc_out(bp, CD180_TBPRH, (tmp >> 8) & 0xff); |
| rc_out(bp, CD180_RBPRL, tmp & 0xff); |
| rc_out(bp, CD180_TBPRL, tmp & 0xff); |
| |
| baud = (baud + 5) / 10; /* Estimated CPS */ |
| |
| /* Two timer ticks seems enough to wakeup something like SLIP driver */ |
| tmp = ((baud + HZ/2) / HZ) * 2 - CD180_NFIFO; |
| port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ? |
| SERIAL_XMIT_SIZE - 1 : tmp); |
| |
| /* Receiver timeout will be transmission time for 1.5 chars */ |
| tmp = (RISCOM_TPS + RISCOM_TPS/2 + baud/2) / baud; |
| tmp = (tmp > 0xff) ? 0xff : tmp; |
| rc_out(bp, CD180_RTPR, tmp); |
| |
| switch (C_CSIZE(tty)) { |
| case CS5: |
| cor1 |= COR1_5BITS; |
| break; |
| case CS6: |
| cor1 |= COR1_6BITS; |
| break; |
| case CS7: |
| cor1 |= COR1_7BITS; |
| break; |
| case CS8: |
| cor1 |= COR1_8BITS; |
| break; |
| } |
| if (C_CSTOPB(tty)) |
| cor1 |= COR1_2SB; |
| |
| cor1 |= COR1_IGNORE; |
| if (C_PARENB(tty)) { |
| cor1 |= COR1_NORMPAR; |
| if (C_PARODD(tty)) |
| cor1 |= COR1_ODDP; |
| if (I_INPCK(tty)) |
| cor1 &= ~COR1_IGNORE; |
| } |
| /* Set marking of some errors */ |
| port->mark_mask = RCSR_OE | RCSR_TOUT; |
| if (I_INPCK(tty)) |
| port->mark_mask |= RCSR_FE | RCSR_PE; |
| if (I_BRKINT(tty) || I_PARMRK(tty)) |
| port->mark_mask |= RCSR_BREAK; |
| if (I_IGNPAR(tty)) |
| port->mark_mask &= ~(RCSR_FE | RCSR_PE); |
| if (I_IGNBRK(tty)) { |
| port->mark_mask &= ~RCSR_BREAK; |
| if (I_IGNPAR(tty)) |
| /* Real raw mode. Ignore all */ |
| port->mark_mask &= ~RCSR_OE; |
| } |
| /* Enable Hardware Flow Control */ |
| if (C_CRTSCTS(tty)) { |
| #ifdef RISCOM_BRAIN_DAMAGED_CTS |
| port->IER |= IER_DSR | IER_CTS; |
| mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD; |
| mcor2 |= MCOR2_DSROD | MCOR2_CTSOD; |
| tty->hw_stopped = !(rc_in(bp, CD180_MSVR) & |
| (MSVR_CTS|MSVR_DSR)); |
| #else |
| port->COR2 |= COR2_CTSAE; |
| #endif |
| } |
| /* Enable Software Flow Control. FIXME: I'm not sure about this */ |
| /* Some people reported that it works, but I still doubt */ |
| if (I_IXON(tty)) { |
| port->COR2 |= COR2_TXIBE; |
| cor3 |= (COR3_FCT | COR3_SCDE); |
| if (I_IXANY(tty)) |
| port->COR2 |= COR2_IXM; |
| rc_out(bp, CD180_SCHR1, START_CHAR(tty)); |
| rc_out(bp, CD180_SCHR2, STOP_CHAR(tty)); |
| rc_out(bp, CD180_SCHR3, START_CHAR(tty)); |
| rc_out(bp, CD180_SCHR4, STOP_CHAR(tty)); |
| } |
| if (!C_CLOCAL(tty)) { |
| /* Enable CD check */ |
| port->IER |= IER_CD; |
| mcor1 |= MCOR1_CDZD; |
| mcor2 |= MCOR2_CDOD; |
| } |
| |
| if (C_CREAD(tty)) |
| /* Enable receiver */ |
| port->IER |= IER_RXD; |
| |
| /* Set input FIFO size (1-8 bytes) */ |
| cor3 |= RISCOM_RXFIFO; |
| /* Setting up CD180 channel registers */ |
| rc_out(bp, CD180_COR1, cor1); |
| rc_out(bp, CD180_COR2, port->COR2); |
| rc_out(bp, CD180_COR3, cor3); |
| /* Make CD180 know about registers change */ |
| rc_wait_CCR(bp); |
| rc_out(bp, CD180_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3); |
| /* Setting up modem option registers */ |
| rc_out(bp, CD180_MCOR1, mcor1); |
| rc_out(bp, CD180_MCOR2, mcor2); |
| /* Enable CD180 transmitter & receiver */ |
| rc_wait_CCR(bp); |
| rc_out(bp, CD180_CCR, CCR_TXEN | CCR_RXEN); |
| /* Enable interrupts */ |
| rc_out(bp, CD180_IER, port->IER); |
| /* And finally set RTS on */ |
| rc_out(bp, CD180_MSVR, port->MSVR); |
| } |
| |
| /* Must be called with interrupts enabled */ |
| static int rc_setup_port(struct tty_struct *tty, struct riscom_board *bp, |
| struct riscom_port *port) |
| { |
| unsigned long flags; |
| |
| if (port->port.flags & ASYNC_INITIALIZED) |
| return 0; |
| |
| if (tty_port_alloc_xmit_buf(&port->port) < 0) |
| return -ENOMEM; |
| |
| spin_lock_irqsave(&riscom_lock, flags); |
| |
| clear_bit(TTY_IO_ERROR, &tty->flags); |
| if (port->port.count == 1) |
| bp->count++; |
| port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
| rc_change_speed(tty, bp, port); |
| port->port.flags |= ASYNC_INITIALIZED; |
| |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| return 0; |
| } |
| |
| /* Must be called with interrupts disabled */ |
| static void rc_shutdown_port(struct tty_struct *tty, |
| struct riscom_board *bp, struct riscom_port *port) |
| { |
| if (!(port->port.flags & ASYNC_INITIALIZED)) |
| return; |
| |
| #ifdef RC_REPORT_OVERRUN |
| printk(KERN_INFO "rc%d: port %d: Total %ld overruns were detected.\n", |
| board_No(bp), port_No(port), port->overrun); |
| #endif |
| #ifdef RC_REPORT_FIFO |
| { |
| int i; |
| |
| printk(KERN_INFO "rc%d: port %d: FIFO hits [ ", |
| board_No(bp), port_No(port)); |
| for (i = 0; i < 10; i++) |
| printk("%ld ", port->hits[i]); |
| printk("].\n"); |
| } |
| #endif |
| tty_port_free_xmit_buf(&port->port); |
| if (C_HUPCL(tty)) { |
| /* Drop DTR */ |
| bp->DTR |= (1u << port_No(port)); |
| rc_out(bp, RC_DTR, bp->DTR); |
| } |
| |
| /* Select port */ |
| rc_out(bp, CD180_CAR, port_No(port)); |
| /* Reset port */ |
| rc_wait_CCR(bp); |
| rc_out(bp, CD180_CCR, CCR_SOFTRESET); |
| /* Disable all interrupts from this port */ |
| port->IER = 0; |
| rc_out(bp, CD180_IER, port->IER); |
| |
| set_bit(TTY_IO_ERROR, &tty->flags); |
| port->port.flags &= ~ASYNC_INITIALIZED; |
| |
| if (--bp->count < 0) { |
| printk(KERN_INFO "rc%d: rc_shutdown_port: " |
| "bad board count: %d\n", |
| board_No(bp), bp->count); |
| bp->count = 0; |
| } |
| /* |
| * If this is the last opened port on the board |
| * shutdown whole board |
| */ |
| if (!bp->count) |
| rc_shutdown_board(bp); |
| } |
| |
| static int carrier_raised(struct tty_port *port) |
| { |
| struct riscom_port *p = container_of(port, struct riscom_port, port); |
| struct riscom_board *bp = port_Board(p); |
| unsigned long flags; |
| int CD; |
| |
| spin_lock_irqsave(&riscom_lock, flags); |
| rc_out(bp, CD180_CAR, port_No(p)); |
| CD = rc_in(bp, CD180_MSVR) & MSVR_CD; |
| rc_out(bp, CD180_MSVR, MSVR_RTS); |
| bp->DTR &= ~(1u << port_No(p)); |
| rc_out(bp, RC_DTR, bp->DTR); |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| return CD; |
| } |
| |
| static int rc_open(struct tty_struct *tty, struct file *filp) |
| { |
| int board; |
| int error; |
| struct riscom_port *port; |
| struct riscom_board *bp; |
| |
| board = RC_BOARD(tty->index); |
| if (board >= RC_NBOARD || !(rc_board[board].flags & RC_BOARD_PRESENT)) |
| return -ENODEV; |
| |
| bp = &rc_board[board]; |
| port = rc_port + board * RC_NPORT + RC_PORT(tty->index); |
| if (rc_paranoia_check(port, tty->name, "rc_open")) |
| return -ENODEV; |
| |
| error = rc_setup_board(bp); |
| if (error) |
| return error; |
| |
| port->port.count++; |
| tty->driver_data = port; |
| tty_port_tty_set(&port->port, tty); |
| |
| error = rc_setup_port(tty, bp, port); |
| if (error == 0) |
| error = tty_port_block_til_ready(&port->port, tty, filp); |
| return error; |
| } |
| |
| static void rc_flush_buffer(struct tty_struct *tty) |
| { |
| struct riscom_port *port = tty->driver_data; |
| unsigned long flags; |
| |
| if (rc_paranoia_check(port, tty->name, "rc_flush_buffer")) |
| return; |
| |
| spin_lock_irqsave(&riscom_lock, flags); |
| port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| |
| tty_wakeup(tty); |
| } |
| |
| static void rc_close_port(struct tty_port *port, struct tty_struct *tty) |
| { |
| unsigned long flags; |
| struct riscom_port *rp = container_of(port, struct riscom_port, port); |
| struct riscom_board *bp = port_Board(rp); |
| unsigned long timeout; |
| |
| /* |
| * At this point we stop accepting input. To do this, we |
| * disable the receive line status interrupts, and tell the |
| * interrupt driver to stop checking the data ready bit in the |
| * line status register. |
| */ |
| |
| spin_lock_irqsave(&riscom_lock, flags); |
| rp->IER &= ~IER_RXD; |
| if (port->flags & ASYNC_INITIALIZED) { |
| rp->IER &= ~IER_TXRDY; |
| rp->IER |= IER_TXEMPTY; |
| rc_out(bp, CD180_CAR, port_No(rp)); |
| rc_out(bp, CD180_IER, rp->IER); |
| /* |
| * Before we drop DTR, make sure the UART transmitter |
| * has completely drained; this is especially |
| * important if there is a transmit FIFO! |
| */ |
| timeout = jiffies + HZ; |
| while (rp->IER & IER_TXEMPTY) { |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| msleep_interruptible(jiffies_to_msecs(rp->timeout)); |
| spin_lock_irqsave(&riscom_lock, flags); |
| if (time_after(jiffies, timeout)) |
| break; |
| } |
| } |
| rc_shutdown_port(tty, bp, rp); |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| } |
| |
| static void rc_close(struct tty_struct *tty, struct file *filp) |
| { |
| struct riscom_port *port = tty->driver_data; |
| |
| if (!port || rc_paranoia_check(port, tty->name, "close")) |
| return; |
| tty_port_close(&port->port, tty, filp); |
| } |
| |
| static int rc_write(struct tty_struct *tty, |
| const unsigned char *buf, int count) |
| { |
| struct riscom_port *port = tty->driver_data; |
| struct riscom_board *bp; |
| int c, total = 0; |
| unsigned long flags; |
| |
| if (rc_paranoia_check(port, tty->name, "rc_write")) |
| return 0; |
| |
| bp = port_Board(port); |
| |
| while (1) { |
| spin_lock_irqsave(&riscom_lock, flags); |
| |
| c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, |
| SERIAL_XMIT_SIZE - port->xmit_head)); |
| if (c <= 0) |
| break; /* lock continues to be held */ |
| |
| memcpy(port->port.xmit_buf + port->xmit_head, buf, c); |
| port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1); |
| port->xmit_cnt += c; |
| |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| |
| buf += c; |
| count -= c; |
| total += c; |
| } |
| |
| if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped && |
| !(port->IER & IER_TXRDY)) { |
| port->IER |= IER_TXRDY; |
| rc_out(bp, CD180_CAR, port_No(port)); |
| rc_out(bp, CD180_IER, port->IER); |
| } |
| |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| |
| return total; |
| } |
| |
| static int rc_put_char(struct tty_struct *tty, unsigned char ch) |
| { |
| struct riscom_port *port = tty->driver_data; |
| unsigned long flags; |
| int ret = 0; |
| |
| if (rc_paranoia_check(port, tty->name, "rc_put_char")) |
| return 0; |
| |
| spin_lock_irqsave(&riscom_lock, flags); |
| |
| if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) |
| goto out; |
| |
| port->port.xmit_buf[port->xmit_head++] = ch; |
| port->xmit_head &= SERIAL_XMIT_SIZE - 1; |
| port->xmit_cnt++; |
| ret = 1; |
| |
| out: |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| return ret; |
| } |
| |
| static void rc_flush_chars(struct tty_struct *tty) |
| { |
| struct riscom_port *port = tty->driver_data; |
| unsigned long flags; |
| |
| if (rc_paranoia_check(port, tty->name, "rc_flush_chars")) |
| return; |
| |
| if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped) |
| return; |
| |
| spin_lock_irqsave(&riscom_lock, flags); |
| |
| port->IER |= IER_TXRDY; |
| rc_out(port_Board(port), CD180_CAR, port_No(port)); |
| rc_out(port_Board(port), CD180_IER, port->IER); |
| |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| } |
| |
| static int rc_write_room(struct tty_struct *tty) |
| { |
| struct riscom_port *port = tty->driver_data; |
| int ret; |
| |
| if (rc_paranoia_check(port, tty->name, "rc_write_room")) |
| return 0; |
| |
| ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; |
| if (ret < 0) |
| ret = 0; |
| return ret; |
| } |
| |
| static int rc_chars_in_buffer(struct tty_struct *tty) |
| { |
| struct riscom_port *port = tty->driver_data; |
| |
| if (rc_paranoia_check(port, tty->name, "rc_chars_in_buffer")) |
| return 0; |
| |
| return port->xmit_cnt; |
| } |
| |
| static int rc_tiocmget(struct tty_struct *tty, struct file *file) |
| { |
| struct riscom_port *port = tty->driver_data; |
| struct riscom_board *bp; |
| unsigned char status; |
| unsigned int result; |
| unsigned long flags; |
| |
| if (rc_paranoia_check(port, tty->name, __func__)) |
| return -ENODEV; |
| |
| bp = port_Board(port); |
| |
| spin_lock_irqsave(&riscom_lock, flags); |
| |
| rc_out(bp, CD180_CAR, port_No(port)); |
| status = rc_in(bp, CD180_MSVR); |
| result = rc_in(bp, RC_RI) & (1u << port_No(port)) ? 0 : TIOCM_RNG; |
| |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| |
| result |= ((status & MSVR_RTS) ? TIOCM_RTS : 0) |
| | ((status & MSVR_DTR) ? TIOCM_DTR : 0) |
| | ((status & MSVR_CD) ? TIOCM_CAR : 0) |
| | ((status & MSVR_DSR) ? TIOCM_DSR : 0) |
| | ((status & MSVR_CTS) ? TIOCM_CTS : 0); |
| return result; |
| } |
| |
| static int rc_tiocmset(struct tty_struct *tty, struct file *file, |
| unsigned int set, unsigned int clear) |
| { |
| struct riscom_port *port = tty->driver_data; |
| unsigned long flags; |
| struct riscom_board *bp; |
| |
| if (rc_paranoia_check(port, tty->name, __func__)) |
| return -ENODEV; |
| |
| bp = port_Board(port); |
| |
| spin_lock_irqsave(&riscom_lock, flags); |
| |
| if (set & TIOCM_RTS) |
| port->MSVR |= MSVR_RTS; |
| if (set & TIOCM_DTR) |
| bp->DTR &= ~(1u << port_No(port)); |
| |
| if (clear & TIOCM_RTS) |
| port->MSVR &= ~MSVR_RTS; |
| if (clear & TIOCM_DTR) |
| bp->DTR |= (1u << port_No(port)); |
| |
| rc_out(bp, CD180_CAR, port_No(port)); |
| rc_out(bp, CD180_MSVR, port->MSVR); |
| rc_out(bp, RC_DTR, bp->DTR); |
| |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| |
| return 0; |
| } |
| |
| static int rc_send_break(struct tty_struct *tty, int length) |
| { |
| struct riscom_port *port = tty->driver_data; |
| struct riscom_board *bp = port_Board(port); |
| unsigned long flags; |
| |
| if (length == 0 || length == -1) |
| return -EOPNOTSUPP; |
| |
| spin_lock_irqsave(&riscom_lock, flags); |
| |
| port->break_length = RISCOM_TPS / HZ * length; |
| port->COR2 |= COR2_ETC; |
| port->IER |= IER_TXRDY; |
| rc_out(bp, CD180_CAR, port_No(port)); |
| rc_out(bp, CD180_COR2, port->COR2); |
| rc_out(bp, CD180_IER, port->IER); |
| rc_wait_CCR(bp); |
| rc_out(bp, CD180_CCR, CCR_CORCHG2); |
| rc_wait_CCR(bp); |
| |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| return 0; |
| } |
| |
| static int rc_set_serial_info(struct tty_struct *tty, struct riscom_port *port, |
| struct serial_struct __user *newinfo) |
| { |
| struct serial_struct tmp; |
| struct riscom_board *bp = port_Board(port); |
| int change_speed; |
| |
| if (copy_from_user(&tmp, newinfo, sizeof(tmp))) |
| return -EFAULT; |
| |
| change_speed = ((port->port.flags & ASYNC_SPD_MASK) != |
| (tmp.flags & ASYNC_SPD_MASK)); |
| |
| if (!capable(CAP_SYS_ADMIN)) { |
| if ((tmp.close_delay != port->port.close_delay) || |
| (tmp.closing_wait != port->port.closing_wait) || |
| ((tmp.flags & ~ASYNC_USR_MASK) != |
| (port->port.flags & ~ASYNC_USR_MASK))) |
| return -EPERM; |
| port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) | |
| (tmp.flags & ASYNC_USR_MASK)); |
| } else { |
| port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) | |
| (tmp.flags & ASYNC_FLAGS)); |
| port->port.close_delay = tmp.close_delay; |
| port->port.closing_wait = tmp.closing_wait; |
| } |
| if (change_speed) { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&riscom_lock, flags); |
| rc_change_speed(tty, bp, port); |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| } |
| return 0; |
| } |
| |
| static int rc_get_serial_info(struct riscom_port *port, |
| struct serial_struct __user *retinfo) |
| { |
| struct serial_struct tmp; |
| struct riscom_board *bp = port_Board(port); |
| |
| memset(&tmp, 0, sizeof(tmp)); |
| tmp.type = PORT_CIRRUS; |
| tmp.line = port - rc_port; |
| tmp.port = bp->base; |
| tmp.irq = bp->irq; |
| tmp.flags = port->port.flags; |
| tmp.baud_base = (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC; |
| tmp.close_delay = port->port.close_delay * HZ/100; |
| tmp.closing_wait = port->port.closing_wait * HZ/100; |
| tmp.xmit_fifo_size = CD180_NFIFO; |
| return copy_to_user(retinfo, &tmp, sizeof(tmp)) ? -EFAULT : 0; |
| } |
| |
| static int rc_ioctl(struct tty_struct *tty, struct file *filp, |
| unsigned int cmd, unsigned long arg) |
| { |
| struct riscom_port *port = tty->driver_data; |
| void __user *argp = (void __user *)arg; |
| int retval; |
| |
| if (rc_paranoia_check(port, tty->name, "rc_ioctl")) |
| return -ENODEV; |
| |
| switch (cmd) { |
| case TIOCGSERIAL: |
| lock_kernel(); |
| retval = rc_get_serial_info(port, argp); |
| unlock_kernel(); |
| break; |
| case TIOCSSERIAL: |
| lock_kernel(); |
| retval = rc_set_serial_info(tty, port, argp); |
| unlock_kernel(); |
| break; |
| default: |
| retval = -ENOIOCTLCMD; |
| } |
| return retval; |
| } |
| |
| static void rc_throttle(struct tty_struct *tty) |
| { |
| struct riscom_port *port = tty->driver_data; |
| struct riscom_board *bp; |
| unsigned long flags; |
| |
| if (rc_paranoia_check(port, tty->name, "rc_throttle")) |
| return; |
| bp = port_Board(port); |
| |
| spin_lock_irqsave(&riscom_lock, flags); |
| port->MSVR &= ~MSVR_RTS; |
| rc_out(bp, CD180_CAR, port_No(port)); |
| if (I_IXOFF(tty)) { |
| rc_wait_CCR(bp); |
| rc_out(bp, CD180_CCR, CCR_SSCH2); |
| rc_wait_CCR(bp); |
| } |
| rc_out(bp, CD180_MSVR, port->MSVR); |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| } |
| |
| static void rc_unthrottle(struct tty_struct *tty) |
| { |
| struct riscom_port *port = tty->driver_data; |
| struct riscom_board *bp; |
| unsigned long flags; |
| |
| if (rc_paranoia_check(port, tty->name, "rc_unthrottle")) |
| return; |
| bp = port_Board(port); |
| |
| spin_lock_irqsave(&riscom_lock, flags); |
| port->MSVR |= MSVR_RTS; |
| rc_out(bp, CD180_CAR, port_No(port)); |
| if (I_IXOFF(tty)) { |
| rc_wait_CCR(bp); |
| rc_out(bp, CD180_CCR, CCR_SSCH1); |
| rc_wait_CCR(bp); |
| } |
| rc_out(bp, CD180_MSVR, port->MSVR); |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| } |
| |
| static void rc_stop(struct tty_struct *tty) |
| { |
| struct riscom_port *port = tty->driver_data; |
| struct riscom_board *bp; |
| unsigned long flags; |
| |
| if (rc_paranoia_check(port, tty->name, "rc_stop")) |
| return; |
| |
| bp = port_Board(port); |
| |
| spin_lock_irqsave(&riscom_lock, flags); |
| port->IER &= ~IER_TXRDY; |
| rc_out(bp, CD180_CAR, port_No(port)); |
| rc_out(bp, CD180_IER, port->IER); |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| } |
| |
| static void rc_start(struct tty_struct *tty) |
| { |
| struct riscom_port *port = tty->driver_data; |
| struct riscom_board *bp; |
| unsigned long flags; |
| |
| if (rc_paranoia_check(port, tty->name, "rc_start")) |
| return; |
| |
| bp = port_Board(port); |
| |
| spin_lock_irqsave(&riscom_lock, flags); |
| |
| if (port->xmit_cnt && port->port.xmit_buf && !(port->IER & IER_TXRDY)) { |
| port->IER |= IER_TXRDY; |
| rc_out(bp, CD180_CAR, port_No(port)); |
| rc_out(bp, CD180_IER, port->IER); |
| } |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| } |
| |
| static void rc_hangup(struct tty_struct *tty) |
| { |
| struct riscom_port *port = tty->driver_data; |
| |
| if (rc_paranoia_check(port, tty->name, "rc_hangup")) |
| return; |
| |
| rc_shutdown_port(tty, port_Board(port), port); |
| tty_port_hangup(&port->port); |
| } |
| |
| static void rc_set_termios(struct tty_struct *tty, |
| struct ktermios *old_termios) |
| { |
| struct riscom_port *port = tty->driver_data; |
| unsigned long flags; |
| |
| if (rc_paranoia_check(port, tty->name, "rc_set_termios")) |
| return; |
| |
| spin_lock_irqsave(&riscom_lock, flags); |
| rc_change_speed(tty, port_Board(port), port); |
| spin_unlock_irqrestore(&riscom_lock, flags); |
| |
| if ((old_termios->c_cflag & CRTSCTS) && |
| !(tty->termios->c_cflag & CRTSCTS)) { |
| tty->hw_stopped = 0; |
| rc_start(tty); |
| } |
| } |
| |
| static const struct tty_operations riscom_ops = { |
| .open = rc_open, |
| .close = rc_close, |
| .write = rc_write, |
| .put_char = rc_put_char, |
| .flush_chars = rc_flush_chars, |
| .write_room = rc_write_room, |
| .chars_in_buffer = rc_chars_in_buffer, |
| .flush_buffer = rc_flush_buffer, |
| .ioctl = rc_ioctl, |
| .throttle = rc_throttle, |
| .unthrottle = rc_unthrottle, |
| .set_termios = rc_set_termios, |
| .stop = rc_stop, |
| .start = rc_start, |
| .hangup = rc_hangup, |
| .tiocmget = rc_tiocmget, |
| .tiocmset = rc_tiocmset, |
| .break_ctl = rc_send_break, |
| }; |
| |
| static const struct tty_port_operations riscom_port_ops = { |
| .carrier_raised = carrier_raised, |
| .shutdown = rc_close_port, |
| }; |
| |
| |
| static int __init rc_init_drivers(void) |
| { |
| int error; |
| int i; |
| |
| riscom_driver = alloc_tty_driver(RC_NBOARD * RC_NPORT); |
| if (!riscom_driver) |
| return -ENOMEM; |
| |
| riscom_driver->owner = THIS_MODULE; |
| riscom_driver->name = "ttyL"; |
| riscom_driver->major = RISCOM8_NORMAL_MAJOR; |
| riscom_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| riscom_driver->subtype = SERIAL_TYPE_NORMAL; |
| riscom_driver->init_termios = tty_std_termios; |
| riscom_driver->init_termios.c_cflag = |
| B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
| riscom_driver->init_termios.c_ispeed = 9600; |
| riscom_driver->init_termios.c_ospeed = 9600; |
| riscom_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_HARDWARE_BREAK; |
| tty_set_operations(riscom_driver, &riscom_ops); |
| error = tty_register_driver(riscom_driver); |
| if (error != 0) { |
| put_tty_driver(riscom_driver); |
| printk(KERN_ERR "rc: Couldn't register RISCom/8 driver, " |
| "error = %d\n", error); |
| return 1; |
| } |
| memset(rc_port, 0, sizeof(rc_port)); |
| for (i = 0; i < RC_NPORT * RC_NBOARD; i++) { |
| tty_port_init(&rc_port[i].port); |
| rc_port[i].port.ops = &riscom_port_ops; |
| rc_port[i].magic = RISCOM8_MAGIC; |
| } |
| return 0; |
| } |
| |
| static void rc_release_drivers(void) |
| { |
| tty_unregister_driver(riscom_driver); |
| put_tty_driver(riscom_driver); |
| } |
| |
| #ifndef MODULE |
| /* |
| * Called at boot time. |
| * |
| * You can specify IO base for up to RC_NBOARD cards, |
| * using line "riscom8=0xiobase1,0xiobase2,.." at LILO prompt. |
| * Note that there will be no probing at default |
| * addresses in this case. |
| * |
| */ |
| static int __init riscom8_setup(char *str) |
| { |
| int ints[RC_NBOARD]; |
| int i; |
| |
| str = get_options(str, ARRAY_SIZE(ints), ints); |
| |
| for (i = 0; i < RC_NBOARD; i++) { |
| if (i < ints[0]) |
| rc_board[i].base = ints[i+1]; |
| else |
| rc_board[i].base = 0; |
| } |
| return 1; |
| } |
| |
| __setup("riscom8=", riscom8_setup); |
| #endif |
| |
| static char banner[] __initdata = |
| KERN_INFO "rc: SDL RISCom/8 card driver v1.1, (c) D.Gorodchanin " |
| "1994-1996.\n"; |
| static char no_boards_msg[] __initdata = |
| KERN_INFO "rc: No RISCom/8 boards detected.\n"; |
| |
| /* |
| * This routine must be called by kernel at boot time |
| */ |
| static int __init riscom8_init(void) |
| { |
| int i; |
| int found = 0; |
| |
| printk(banner); |
| |
| if (rc_init_drivers()) |
| return -EIO; |
| |
| for (i = 0; i < RC_NBOARD; i++) |
| if (rc_board[i].base && !rc_probe(&rc_board[i])) |
| found++; |
| if (!found) { |
| rc_release_drivers(); |
| printk(no_boards_msg); |
| return -EIO; |
| } |
| return 0; |
| } |
| |
| #ifdef MODULE |
| static int iobase; |
| static int iobase1; |
| static int iobase2; |
| static int iobase3; |
| module_param(iobase, int, 0); |
| module_param(iobase1, int, 0); |
| module_param(iobase2, int, 0); |
| module_param(iobase3, int, 0); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS_CHARDEV_MAJOR(RISCOM8_NORMAL_MAJOR); |
| #endif /* MODULE */ |
| |
| /* |
| * You can setup up to 4 boards (current value of RC_NBOARD) |
| * by specifying "iobase=0xXXX iobase1=0xXXX ..." as insmod parameter. |
| * |
| */ |
| static int __init riscom8_init_module(void) |
| { |
| #ifdef MODULE |
| int i; |
| |
| if (iobase || iobase1 || iobase2 || iobase3) { |
| for (i = 0; i < RC_NBOARD; i++) |
| rc_board[i].base = 0; |
| } |
| |
| if (iobase) |
| rc_board[0].base = iobase; |
| if (iobase1) |
| rc_board[1].base = iobase1; |
| if (iobase2) |
| rc_board[2].base = iobase2; |
| if (iobase3) |
| rc_board[3].base = iobase3; |
| #endif /* MODULE */ |
| |
| return riscom8_init(); |
| } |
| |
| static void __exit riscom8_exit_module(void) |
| { |
| int i; |
| |
| rc_release_drivers(); |
| for (i = 0; i < RC_NBOARD; i++) |
| if (rc_board[i].flags & RC_BOARD_PRESENT) |
| rc_release_io_range(&rc_board[i]); |
| |
| } |
| |
| module_init(riscom8_init_module); |
| module_exit(riscom8_exit_module); |