diff options
Diffstat (limited to 'drivers/sbus/char/aurora.c')
| -rw-r--r-- | drivers/sbus/char/aurora.c | 2372 |
1 files changed, 2372 insertions, 0 deletions
diff --git a/drivers/sbus/char/aurora.c b/drivers/sbus/char/aurora.c new file mode 100644 index 0000000..e5fa170 --- /dev/null +++ b/drivers/sbus/char/aurora.c @@ -0,0 +1,2372 @@ +/* $Id: aurora.c,v 1.19 2002/01/08 16:00:16 davem Exp $ + * linux/drivers/sbus/char/aurora.c -- Aurora multiport driver + * + * Copyright (c) 1999 by Oliver Aldulea (oli at bv dot ro) + * + * This code is based on the RISCom/8 multiport serial driver written + * by Dmitry Gorodchanin (pgmdsg@ibi.com), based on the Linux serial + * driver, written by Linus Torvalds, Theodore T'so and others. + * The Aurora multiport programming info was obtained mainly from the + * Cirrus Logic CD180 documentation (available on the web), and by + * doing heavy tests on the board. Many thanks to Eddie C. Dost for the + * help on the sbus interface. + * + * 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 1.0 + * + * This is the first public release. + * + * Most of the information you need is in the aurora.h file. Please + * read that file before reading this one. + * + * Several parts of the code do not have comments yet. + * + * n.b. The board can support 115.2 bit rates, but only on a few + * ports. The total badwidth of one chip (ports 0-7 or 8-15) is equal + * to OSC_FREQ div 16. In case of my board, each chip can take 6 + * channels of 115.2 kbaud. This information is not well-tested. + * + * Fixed to use tty_get_baud_rate(). + * Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12 + */ + +#include <linux/module.h> + +#include <linux/errno.h> +#include <linux/sched.h> +#ifdef AURORA_INT_DEBUG +#include <linux/timer.h> +#endif +#include <linux/interrupt.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> +#include <linux/major.h> +#include <linux/string.h> +#include <linux/fcntl.h> +#include <linux/mm.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/bitops.h> + +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/oplib.h> +#include <asm/system.h> +#include <asm/kdebug.h> +#include <asm/sbus.h> +#include <asm/uaccess.h> + +#include "aurora.h" +#include "cd180.h" + +unsigned char irqs[4] = { + 0, 0, 0, 0 +}; + +#ifdef AURORA_INT_DEBUG +int irqhit=0; +#endif + +#ifndef MIN +#define MIN(a,b) ((a) < (b) ? (a) : (b)) +#endif + +static struct tty_driver *aurora_driver; +static struct Aurora_board aurora_board[AURORA_NBOARD] = { + {0,}, +}; + +static struct Aurora_port aurora_port[AURORA_TNPORTS] = { + { 0, }, +}; + +/* no longer used. static struct Aurora_board * IRQ_to_board[16] = { NULL, } ;*/ +static unsigned char * tmp_buf = NULL; +static DECLARE_MUTEX(tmp_buf_sem); + +DECLARE_TASK_QUEUE(tq_aurora); + +static inline int aurora_paranoia_check(struct Aurora_port const * port, + char *name, const char *routine) +{ +#ifdef AURORA_PARANOIA_CHECK + static const char *badmagic = + KERN_DEBUG "aurora: Warning: bad aurora port magic number for device %s in %s\n"; + static const char *badinfo = + KERN_DEBUG "aurora: Warning: null aurora port for device %s in %s\n"; + + if (!port) { + printk(badinfo, name, routine); + return 1; + } + if (port->magic != AURORA_MAGIC) { + printk(badmagic, name, routine); + return 1; + } +#endif + return 0; +} + +/* + * + * Service functions for aurora driver. + * + */ + +/* Get board number from pointer */ +extern inline int board_No (struct Aurora_board const * bp) +{ + return bp - aurora_board; +} + +/* Get port number from pointer */ +extern inline int port_No (struct Aurora_port const * port) +{ + return AURORA_PORT(port - aurora_port); +} + +/* Get pointer to board from pointer to port */ +extern inline struct Aurora_board * port_Board(struct Aurora_port const * port) +{ + return &aurora_board[AURORA_BOARD(port - aurora_port)]; +} + +/* Wait for Channel Command Register ready */ +extern inline void aurora_wait_CCR(struct aurora_reg128 * r) +{ + unsigned long delay; + +#ifdef AURORA_DEBUG +printk("aurora_wait_CCR\n"); +#endif + /* FIXME: need something more descriptive than 100000 :) */ + for (delay = 100000; delay; delay--) + if (!sbus_readb(&r->r[CD180_CCR])) + return; + printk(KERN_DEBUG "aurora: Timeout waiting for CCR.\n"); +} + +/* + * aurora probe functions. + */ + +/* Must be called with enabled interrupts */ +extern inline void aurora_long_delay(unsigned long delay) +{ + unsigned long i; + +#ifdef AURORA_DEBUG + printk("aurora_long_delay: start\n"); +#endif + for (i = jiffies + delay; time_before(jiffies, i); ) ; +#ifdef AURORA_DEBUG + printk("aurora_long_delay: end\n"); +#endif +} + +/* Reset and setup CD180 chip */ +static int aurora_init_CD180(struct Aurora_board * bp, int chip) +{ + unsigned long flags; + int id; + +#ifdef AURORA_DEBUG + printk("aurora_init_CD180: start %d:%d\n", + board_No(bp), chip); +#endif + save_flags(flags); cli(); + sbus_writeb(0, &bp->r[chip]->r[CD180_CAR]); + sbus_writeb(0, &bp->r[chip]->r[CD180_GSVR]); + + /* Wait for CCR ready */ + aurora_wait_CCR(bp->r[chip]); + + /* Reset CD180 chip */ + sbus_writeb(CCR_HARDRESET, &bp->r[chip]->r[CD180_CCR]); + udelay(1); + sti(); + id=1000; + while((--id) && + (sbus_readb(&bp->r[chip]->r[CD180_GSVR])!=0xff))udelay(100); + if(!id) { + printk(KERN_ERR "aurora%d: Chip %d failed init.\n", + board_No(bp), chip); + restore_flags(flags); + return(-1); + } + cli(); + sbus_writeb((board_No(bp)<<5)|((chip+1)<<3), + &bp->r[chip]->r[CD180_GSVR]); /* Set ID for this chip */ + sbus_writeb(0x80|bp->ACK_MINT, + &bp->r[chip]->r[CD180_MSMR]); /* Prio for modem intr */ + sbus_writeb(0x80|bp->ACK_TINT, + &bp->r[chip]->r[CD180_TSMR]); /* Prio for transmitter intr */ + sbus_writeb(0x80|bp->ACK_RINT, + &bp->r[chip]->r[CD180_RSMR]); /* Prio for receiver intr */ + /* Setting up prescaler. We need 4 tick per 1 ms */ + sbus_writeb((bp->oscfreq/(1000000/AURORA_TPS)) >> 8, + &bp->r[chip]->r[CD180_PPRH]); + sbus_writeb((bp->oscfreq/(1000000/AURORA_TPS)) & 0xff, + &bp->r[chip]->r[CD180_PPRL]); + + sbus_writeb(SRCR_AUTOPRI|SRCR_GLOBPRI, + &bp->r[chip]->r[CD180_SRCR]); + + id = sbus_readb(&bp->r[chip]->r[CD180_GFRCR]); + printk(KERN_INFO "aurora%d: Chip %d id %02x: ", + board_No(bp), chip,id); + if(sbus_readb(&bp->r[chip]->r[CD180_SRCR]) & 128) { + switch (id) { + case 0x82:printk("CL-CD1864 rev A\n");break; + case 0x83:printk("CL-CD1865 rev A\n");break; + case 0x84:printk("CL-CD1865 rev B\n");break; + case 0x85:printk("CL-CD1865 rev C\n");break; + default:printk("Unknown.\n"); + }; + } else { + switch (id) { + case 0x81:printk("CL-CD180 rev B\n");break; + case 0x82:printk("CL-CD180 rev C\n");break; + default:printk("Unknown.\n"); + }; + } + restore_flags(flags); +#ifdef AURORA_DEBUG + printk("aurora_init_CD180: end\n"); +#endif + return 0; +} + +static int valid_irq(unsigned char irq) +{ +int i; +for(i=0;i<TYPE_1_IRQS;i++) + if (type_1_irq[i]==irq) return 1; +return 0; +} + +static irqreturn_t aurora_interrupt(int irq, void * dev_id, struct pt_regs * regs); + +/* Main probing routine, also sets irq. */ +static int aurora_probe(void) +{ + struct sbus_bus *sbus; + struct sbus_dev *sdev; + int grrr; + char buf[30]; + int bn = 0; + struct Aurora_board *bp; + + for_each_sbus(sbus) { + for_each_sbusdev(sdev, sbus) { +/* printk("Try: %x %s\n",sdev,sdev->prom_name);*/ + if (!strcmp(sdev->prom_name, "sio16")) { +#ifdef AURORA_DEBUG + printk(KERN_INFO "aurora: sio16 at %p\n",sdev); +#endif + if((sdev->reg_addrs[0].reg_size!=1) && + (sdev->reg_addrs[1].reg_size!=128) && + (sdev->reg_addrs[2].reg_size!=128) && + (sdev->reg_addrs[3].reg_size!=4)) { + printk(KERN_ERR "aurora%d: registers' sizes " + "do not match.\n", bn); + break; + } + bp = &aurora_board[bn]; + bp->r0 = (struct aurora_reg1 *) + sbus_ioremap(&sdev->resource[0], 0, + sdev->reg_addrs[0].reg_size, + "sio16"); + if (bp->r0 == NULL) { + printk(KERN_ERR "aurora%d: can't map " + "reg_addrs[0]\n", bn); + break; + } +#ifdef AURORA_DEBUG + printk("Map reg 0: %p\n", bp->r0); +#endif + bp->r[0] = (struct aurora_reg128 *) + sbus_ioremap(&sdev->resource[1], 0, + sdev->reg_addrs[1].reg_size, + "sio16"); + if (bp->r[0] == NULL) { + printk(KERN_ERR "aurora%d: can't map " + "reg_addrs[1]\n", bn); + break; + } +#ifdef AURORA_DEBUG + printk("Map reg 1: %p\n", bp->r[0]); +#endif + bp->r[1] = (struct aurora_reg128 *) + sbus_ioremap(&sdev->resource[2], 0, + sdev->reg_addrs[2].reg_size, + "sio16"); + if (bp->r[1] == NULL) { + printk(KERN_ERR "aurora%d: can't map " + "reg_addrs[2]\n", bn); + break; + } +#ifdef AURORA_DEBUG + printk("Map reg 2: %p\n", bp->r[1]); +#endif + bp->r3 = (struct aurora_reg4 *) + sbus_ioremap(&sdev->resource[3], 0, + sdev->reg_addrs[3].reg_size, + "sio16"); + if (bp->r3 == NULL) { + printk(KERN_ERR "aurora%d: can't map " + "reg_addrs[3]\n", bn); + break; + } +#ifdef AURORA_DEBUG + printk("Map reg 3: %p\n", bp->r3); +#endif + /* Variables setup */ + bp->flags = 0; +#ifdef AURORA_DEBUG + grrr=prom_getint(sdev->prom_node,"intr"); + printk("intr pri %d\n", grrr); +#endif + if ((bp->irq=irqs[bn]) && valid_irq(bp->irq) && + !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) { + free_irq(bp->irq|0x30, bp); + } else + if ((bp->irq=prom_getint(sdev->prom_node, "bintr")) && valid_irq(bp->irq) && + !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) { + free_irq(bp->irq|0x30, bp); + } else + if ((bp->irq=prom_getint(sdev->prom_node, "intr")) && valid_irq(bp->irq) && + !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) { + free_irq(bp->irq|0x30, bp); + } else + for(grrr=0;grrr<TYPE_1_IRQS;grrr++) { + if ((bp->irq=type_1_irq[grrr])&&!request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) { + free_irq(bp->irq|0x30, bp); + break; + } else { + printk(KERN_ERR "aurora%d: Could not get an irq for this board !!!\n",bn); + bp->flags=0xff; + } + } + if(bp->flags==0xff)break; + printk(KERN_INFO "aurora%d: irq %d\n",bn,bp->irq&0x0f); + buf[0]=0; + grrr=prom_getproperty(sdev->prom_node,"dtr_rts",buf,sizeof(buf)); + if(!strcmp(buf,"swapped")){ + printk(KERN_INFO "aurora%d: Swapped DTR and RTS\n",bn); + bp->DTR=MSVR_RTS; + bp->RTS=MSVR_DTR; + bp->MSVDTR=CD180_MSVRTS; + bp->MSVRTS=CD180_MSVDTR; + bp->flags|=AURORA_BOARD_DTR_FLOW_OK; + }else{ + #ifdef AURORA_FORCE_DTR_FLOW + printk(KERN_INFO "aurora%d: Forcing swapped DTR-RTS\n",bn); + bp->DTR=MSVR_RTS; + bp->RTS=MSVR_DTR; + bp->MSVDTR=CD180_MSVRTS; + bp->MSVRTS=CD180_MSVDTR; + bp->flags|=AURORA_BOARD_DTR_FLOW_OK; + #else + printk(KERN_INFO "aurora%d: Normal DTR and RTS\n",bn); + bp->DTR=MSVR_DTR; + bp->RTS=MSVR_RTS; + bp->MSVDTR=CD180_MSVDTR; + bp->MSVRTS=CD180_MSVRTS; + #endif + } + bp->oscfreq=prom_getint(sdev->prom_node,"clk")*100; + printk(KERN_INFO "aurora%d: Oscillator: %d Hz\n",bn,bp->oscfreq); + grrr=prom_getproperty(sdev->prom_node,"chip",buf,sizeof(buf)); + printk(KERN_INFO "aurora%d: Chips: %s\n",bn,buf); + grrr=prom_getproperty(sdev->prom_node,"manu",buf,sizeof(buf)); + printk(KERN_INFO "aurora%d: Manufacturer: %s\n",bn,buf); + grrr=prom_getproperty(sdev->prom_node,"model",buf,sizeof(buf)); + printk(KERN_INFO "aurora%d: Model: %s\n",bn,buf); + grrr=prom_getproperty(sdev->prom_node,"rev",buf,sizeof(buf)); + printk(KERN_INFO "aurora%d: Revision: %s\n",bn,buf); + grrr=prom_getproperty(sdev->prom_node,"mode",buf,sizeof(buf)); + printk(KERN_INFO "aurora%d: Mode: %s\n",bn,buf); + #ifdef MODULE + bp->count=0; + #endif + bp->flags = AURORA_BOARD_PRESENT; + /* hardware ack */ + bp->ACK_MINT=1; + bp->ACK_TINT=2; + bp->ACK_RINT=3; + bn++; + } + } + } + return bn; +} + +static void aurora_release_io_range(struct Aurora_board *bp) +{ + sbus_iounmap((unsigned long)bp->r0, 1); + sbus_iounmap((unsigned long)bp->r[0], 128); + sbus_iounmap((unsigned long)bp->r[1], 128); + sbus_iounmap((unsigned long)bp->r3, 4); +} + +extern inline void aurora_mark_event(struct Aurora_port * port, int event) +{ +#ifdef AURORA_DEBUG + printk("aurora_mark_event: start\n"); +#endif + set_bit(event, &port->event); + queue_task(&port->tqueue, &tq_aurora); + mark_bh(AURORA_BH); +#ifdef AURORA_DEBUG + printk("aurora_mark_event: end\n"); +#endif +} + +static __inline__ struct Aurora_port * aurora_get_port(struct Aurora_board const * bp, + int chip, + unsigned char const *what) +{ + unsigned char channel; + struct Aurora_port * port; + + channel = ((chip << 3) | + ((sbus_readb(&bp->r[chip]->r[CD180_GSCR]) & GSCR_CHAN) >> GSCR_CHAN_OFF)); + port = &aurora_port[board_No(bp) * AURORA_NPORT * AURORA_NCD180 + channel]; + if (port->flags & ASYNC_INITIALIZED) + return port; + + printk(KERN_DEBUG "aurora%d: %s interrupt from invalid port %d\n", + board_No(bp), what, channel); + return NULL; +} + +static void aurora_receive_exc(struct Aurora_board const * bp, int chip) +{ + struct Aurora_port *port; + struct tty_struct *tty; + unsigned char status; + unsigned char ch; + + if (!(port = aurora_get_port(bp, chip, "Receive_x"))) + return; + + tty = port->tty; + if (tty->flip.count >= TTY_FLIPBUF_SIZE) { +#ifdef AURORA_INTNORM + printk("aurora%d: port %d: Working around flip buffer overflow.\n", + board_No(bp), port_No(port)); +#endif + return; + } + +#ifdef AURORA_REPORT_OVERRUN + status = sbus_readb(&bp->r[chip]->r[CD180_RCSR]); + if (status & RCSR_OE) { + port->overrun++; +#if 1 + printk("aurora%d: port %d: Overrun. Total %ld overruns.\n", + board_No(bp), port_No(port), port->overrun); +#endif + } + status &= port->mark_mask; +#else + status = sbus_readb(&bp->r[chip]->r[CD180_RCSR]) & port->mark_mask; +#endif + ch = sbus_readb(&bp->r[chip]->r[CD180_RDR]); + if (!status) + return; + + if (status & RCSR_TOUT) { +/* printk("aurora%d: port %d: Receiver timeout. Hardware problems ?\n", + board_No(bp), port_No(port));*/ + return; + + } else if (status & RCSR_BREAK) { + printk(KERN_DEBUG "aurora%d: port %d: Handling break...\n", + board_No(bp), port_No(port)); + *tty->flip.flag_buf_ptr++ = TTY_BREAK; + if (port->flags & ASYNC_SAK) + do_SAK(tty); + + } else if (status & RCSR_PE) + *tty->flip.flag_buf_ptr++ = TTY_PARITY; + + else if (status & RCSR_FE) + *tty->flip.flag_buf_ptr++ = TTY_FRAME; + + else if (status & RCSR_OE) + *tty->flip.flag_buf_ptr++ = TTY_OVERRUN; + + else + *tty->flip.flag_buf_ptr++ = 0; + + *tty->flip.char_buf_ptr++ = ch; + tty->flip.count++; + queue_task(&tty->flip.tqueue, &tq_timer); +} + +static void aurora_receive(struct Aurora_board const * bp, int chip) +{ + struct Aurora_port *port; + struct tty_struct *tty; + unsigned char count,cnt; + + if (!(port = aurora_get_port(bp, chip, "Receive"))) + return; + + tty = port->tty; + + count = sbus_readb(&bp->r[chip]->r[CD180_RDCR]); + +#ifdef AURORA_REPORT_FIFO + port->hits[count > 8 ? 9 : count]++; +#endif + + while (count--) { + if (tty->flip.count >= TTY_FLIPBUF_SIZE) { +#ifdef AURORA_INTNORM + printk("aurora%d: port %d: Working around flip buffer overflow.\n", + board_No(bp), port_No(port)); +#endif + break; + } + cnt = sbus_readb(&bp->r[chip]->r[CD180_RDR]); + *tty->flip.char_buf_ptr++ = cnt; + *tty->flip.flag_buf_ptr++ = 0; + tty->flip.count++; + } + queue_task(&tty->flip.tqueue, &tq_timer); +} + +static void aurora_transmit(struct Aurora_board const * bp, int chip) +{ + struct Aurora_port *port; + struct tty_struct *tty; + unsigned char count; + + if (!(port = aurora_get_port(bp, chip, "Transmit"))) + return; + + tty = port->tty; + + if (port->SRER & SRER_TXEMPTY) { + /* FIFO drained */ + sbus_writeb(port_No(port) & 7, + &bp->r[chip]->r[CD180_CAR]); + udelay(1); + port->SRER &= ~SRER_TXEMPTY; + sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]); + return; + } + + if ((port->xmit_cnt <= 0 && !port->break_length) + || tty->stopped || tty->hw_stopped) { + sbus_writeb(port_No(port) & 7, + &bp->r[chip]->r[CD180_CAR]); + udelay(1); + port->SRER &= ~SRER_TXRDY; + sbus_writeb(port->SRER, + &bp->r[chip]->r[CD180_SRER]); + return; + } + + if (port->break_length) { + if (port->break_length > 0) { + if (port->COR2 & COR2_ETC) { + sbus_writeb(CD180_C_ESC, + &bp->r[chip]->r[CD180_TDR]); + sbus_writeb(CD180_C_SBRK, + &bp->r[chip]->r[CD180_TDR]); + port->COR2 &= ~COR2_ETC; + } + count = MIN(port->break_length, 0xff); + sbus_writeb(CD180_C_ESC, + &bp->r[chip]->r[CD180_TDR]); + sbus_writeb(CD180_C_DELAY, + &bp->r[chip]->r[CD180_TDR]); + sbus_writeb(count, + &bp->r[chip]->r[CD180_TDR]); + if (!(port->break_length -= count)) + port->break_length--; + } else { + sbus_writeb(CD180_C_ESC, + &bp->r[chip]->r[CD180_TDR]); + sbus_writeb(CD180_C_EBRK, + &bp->r[chip]->r[CD180_TDR]); + sbus_writeb(port->COR2, + &bp->r[chip]->r[CD180_COR2]); + aurora_wait_CCR(bp->r[chip]); + sbus_writeb(CCR_CORCHG2, + &bp->r[chip]->r[CD180_CCR]); + port->break_length = 0; + } + return; + } + + count = CD180_NFIFO; + do { + u8 byte = port->xmit_buf[port->xmit_tail++]; + + sbus_writeb(byte, &bp->r[chip]->r[CD180_TDR]); + port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1); + if (--port->xmit_cnt <= 0) + break; + } while (--count > 0); + + if (port->xmit_cnt <= 0) { + sbus_writeb(port_No(port) & 7, + &bp->r[chip]->r[CD180_CAR]); + udelay(1); + port->SRER &= ~SRER_TXRDY; + sbus_writeb(port->SRER, + &bp->r[chip]->r[CD180_SRER]); + } + if (port->xmit_cnt <= port->wakeup_chars) + aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP); +} + +static void aurora_check_modem(struct Aurora_board const * bp, int chip) +{ + struct Aurora_port *port; + struct tty_struct *tty; + unsigned char mcr; + + if (!(port = aurora_get_port(bp, chip, "Modem"))) + return; + + tty = port->tty; + + mcr = sbus_readb(&bp->r[chip]->r[CD180_MCR]); + if (mcr & MCR_CDCHG) { + if (sbus_readb(&bp->r[chip]->r[CD180_MSVR]) & MSVR_CD) + wake_up_interruptible(&port->open_wait); + else + schedule_task(&port->tqueue_hangup); + } + +/* We don't have such things yet. My aurora board has DTR and RTS swapped, but that doesn't count in this driver. Let's hope + * Aurora didn't made any boards with CTS or DSR broken... + */ +/* #ifdef AURORA_BRAIN_DAMAGED_CTS + if (mcr & MCR_CTSCHG) { + if (aurora_in(bp, CD180_MSVR) & MSVR_CTS) { + tty->hw_stopped = 0; + port->SRER |= SRER_TXRDY; + if (port->xmit_cnt <= port->wakeup_chars) + aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP); + } else { + tty->hw_stopped = 1; + port->SRER &= ~SRER_TXRDY; + } + sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]); + } + if (mcr & MCR_DSRCHG) { + if (aurora_in(bp, CD180_MSVR) & MSVR_DSR) { + tty->hw_stopped = 0; + port->SRER |= SRER_TXRDY; + if (port->xmit_cnt <= port->wakeup_chars) + aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP); + } else { + tty->hw_stopped = 1; + port->SRER &= ~SRER_TXRDY; + } + sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]); + } +#endif AURORA_BRAIN_DAMAGED_CTS */ + + /* Clear change bits */ + sbus_writeb(0, &bp->r[chip]->r[CD180_MCR]); +} + +/* The main interrupt processing routine */ +static irqreturn_t aurora_interrupt(int irq, void * dev_id, struct pt_regs * regs) +{ + unsigned char status; + unsigned char ack,chip/*,chip_id*/; + struct Aurora_board * bp = (struct Aurora_board *) dev_id; + unsigned long loop = 0; + +#ifdef AURORA_INT_DEBUG + printk("IRQ%d %d\n",irq,++irqhit); +#ifdef AURORA_FLOODPRO + if (irqhit>=AURORA_FLOODPRO) + sbus_writeb(8, &bp->r0->r); +#endif +#endif + +/* old bp = IRQ_to_board[irq&0x0f];*/ + + if (!bp || !(bp->flags & AURORA_BOARD_ACTIVE)) + return IRQ_NONE; + +/* The while() below takes care of this. + status = sbus_readb(&bp->r[0]->r[CD180_SRSR]); +#ifdef AURORA_INT_DEBUG + printk("mumu: %02x\n", status); +#endif + if (!(status&SRSR_ANYINT)) + return IRQ_NONE; * Nobody has anything to say, so exit * +*/ + while ((loop++ < 48) && + (status = sbus_readb(&bp->r[0]->r[CD180_SRSR]) & SRSR_ANYINT)){ +#ifdef AURORA_INT_DEBUG + printk("SRSR: %02x\n", status); +#endif + if (status & SRSR_REXT) { + ack = sbus_readb(&bp->r3->r[bp->ACK_RINT]); +#ifdef AURORA_INT_DEBUG + printk("R-ACK %02x\n", ack); +#endif + if ((ack >> 5) == board_No(bp)) { + if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) { + if ((ack&GSVR_ITMASK)==GSVR_IT_RGD) { + aurora_receive(bp,chip); + sbus_writeb(0, + &bp->r[chip]->r[CD180_EOSRR]); + } else if ((ack & GSVR_ITMASK) == GSVR_IT_REXC) { + aurora_receive_exc(bp,chip); + sbus_writeb(0, + &bp->r[chip]->r[CD180_EOSRR]); + } + } + } + } else if (status & SRSR_TEXT) { + ack = sbus_readb(&bp->r3->r[bp->ACK_TINT]); +#ifdef AURORA_INT_DEBUG + printk("T-ACK %02x\n", ack); +#endif + if ((ack >> 5) == board_No(bp)) { + if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) { + if ((ack&GSVR_ITMASK)==GSVR_IT_TX) { + aurora_transmit(bp,chip); + sbus_writeb(0, + &bp->r[chip]->r[CD180_EOSRR]); + } + } + } + } else if (status & SRSR_MEXT) { + ack = sbus_readb(&bp->r3->r[bp->ACK_MINT]); +#ifdef AURORA_INT_DEBUG + printk("M-ACK %02x\n", ack); +#endif + if ((ack >> 5) == board_No(bp)) { + if ((chip = ((ack>>3)&3)-1) < AURORA_NCD180) { + if ((ack&GSVR_ITMASK)==GSVR_IT_MDM) { + aurora_check_modem(bp,chip); + sbus_writeb(0, + &bp->r[chip]->r[CD180_EOSRR]); + } + } + } + } + } +/* I guess this faster code can be used with CD1865, using AUROPRI and GLOBPRI. */ +#if 0 + while ((loop++ < 48)&&(status=bp->r[0]->r[CD180_SRSR]&SRSR_ANYINT)){ +#ifdef AURORA_INT_DEBUG + printk("SRSR: %02x\n",status); +#endif + ack = sbus_readb(&bp->r3->r[0]); +#ifdef AURORA_INT_DEBUG + printk("ACK: %02x\n",ack); +#endif + if ((ack>>5)==board_No(bp)) { + if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) { + ack&=GSVR_ITMASK; + if (ack==GSVR_IT_RGD) { + aurora_receive(bp,chip); + sbus_writeb(0, + &bp->r[chip]->r[CD180_EOSRR]); + } else if (ack==GSVR_IT_REXC) { + aurora_receive_exc(bp,chip); + sbus_writeb(0, + &bp->r[chip]->r[CD180_EOSRR]); + } else if (ack==GSVR_IT_TX) { + aurora_transmit(bp,chip); + sbus_writeb(0, + &bp->r[chip]->r[CD180_EOSRR]); + } else if (ack==GSVR_IT_MDM) { + aurora_check_modem(bp,chip); + sbus_writeb(0, + &bp->r[chip]->r[CD180_EOSRR]); + } + } + } + } +#endif + +/* This is the old handling routine, used in riscom8 for only one CD180. I keep it here for reference. */ +#if 0 + for(chip=0;chip<AURORA_NCD180;chip++){ + chip_id=(board_No(bp)<<5)|((chip+1)<<3); + loop=0; + while ((loop++ < 1) && + ((status = sbus_readb(&bp->r[chip]->r[CD180_SRSR])) & + (SRSR_TEXT | SRSR_MEXT | SRSR_REXT))) { + + if (status & SRSR_REXT) { + ack = sbus_readb(&bp->r3->r[bp->ACK_RINT]); + if (ack == (chip_id | GSVR_IT_RGD)) { +#ifdef AURORA_INTMSG + printk("RX ACK\n"); +#endif + aurora_receive(bp,chip); + } else if (ack == (chip_id | GSVR_IT_REXC)) { +#ifdef AURORA_INTMSG + printk("RXC ACK\n"); +#endif + aurora_receive_exc(bp,chip); + } else { +#ifdef AURORA_INTNORM + printk("aurora%d-%d: Bad receive ack 0x%02x.\n", + board_No(bp), chip, ack); +#endif + } + } else if (status & SRSR_TEXT) { + ack = sbus_readb(&bp->r3->r[bp->ACK_TINT]); + if (ack == (chip_id | GSVR_IT_TX)){ +#ifdef AURORA_INTMSG + printk("TX ACK\n"); +#endif + aurora_transmit(bp,chip); + } else { +#ifdef AURORA_INTNORM + printk("aurora%d-%d: Bad transmit ack 0x%02x.\n", + board_No(bp), chip, ack); +#endif + } + } else if (status & SRSR_MEXT) { + ack = sbus_readb(&bp->r3->r[bp->ACK_MINT]); + if (ack == (chip_id | GSVR_IT_MDM)){ +#ifdef AURORA_INTMSG + printk("MDM ACK\n"); +#endif + aurora_check_modem(bp,chip); + } else { +#ifdef AURORA_INTNORM + printk("aurora%d-%d: Bad modem ack 0x%02x.\n", + board_No(bp), chip, ack); +#endif + } + } + sbus_writeb(0, &bp->r[chip]->r[CD180_EOSRR]); + } + } +#endif + + return IRQ_HANDLED; +} + +#ifdef AURORA_INT_DEBUG +static void aurora_timer (unsigned long ignored); + +static struct timer_list aurora_poll_timer = + TIMER_INITIALIZER(aurora_timer, 0, 0); + +static void +aurora_timer (unsigned long ignored) +{ + unsigned long flags; + int i; + + save_flags(flags); cli(); + + printk("SRSR: %02x,%02x - ", + sbus_readb(&aurora_board[0].r[0]->r[CD180_SRSR]), + sbus_readb(&aurora_board[0].r[1]->r[CD180_SRSR])); + for (i = 0; i < 4; i++) { + udelay(1); + printk("%02x ", + sbus_readb(&aurora_board[0].r3->r[i])); + } + printk("\n"); + + aurora_poll_timer.expires = jiffies + 300; + add_timer (&aurora_poll_timer); + + restore_flags(flags); +} +#endif + +/* + * Routines for open & close processing. + */ + +/* Called with disabled interrupts */ +static int aurora_setup_board(struct Aurora_board * bp) +{ + int error; + +#ifdef AURORA_ALLIRQ + int i; + for (i = 0; i < AURORA_ALLIRQ; i++) { + error = request_irq(allirq[i]|0x30, aurora_interrupt, SA_SHIRQ, + "sio16", bp); + if (error) + printk(KERN_ERR "IRQ%d request error %d\n", + allirq[i], error); + } +#else + error = request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, + "sio16", bp); + if (error) { + printk(KERN_ERR "IRQ request error %d\n", error); + return error; + } +#endif + /* Board reset */ + sbus_writeb(0, &bp->r0->r); + udelay(1); + if (bp->flags & AURORA_BOARD_TYPE_2) { + /* unknown yet */ + } else { + sbus_writeb((AURORA_CFG_ENABLE_IO | AURORA_CFG_ENABLE_IRQ | + (((bp->irq)&0x0f)>>2)), + &bp->r0->r); + } + udelay(10000); + + if (aurora_init_CD180(bp,0))error=1;error=0; + if (aurora_init_CD180(bp,1))error++; + if (error == AURORA_NCD180) { + printk(KERN_ERR "Both chips failed initialisation.\n"); + return -EIO; + } + +#ifdef AURORA_INT_DEBUG + aurora_poll_timer.expires= jiffies + 1; + add_timer(&aurora_poll_timer); +#endif +#ifdef AURORA_DEBUG + printk("aurora_setup_board: end\n"); +#endif + return 0; +} + +/* Called with disabled interrupts */ +static void aurora_shutdown_board(struct Aurora_board *bp) +{ + int i; + +#ifdef AURORA_DEBUG + printk("aurora_shutdown_board: start\n"); +#endif + +#ifdef AURORA_INT_DEBUG + del_timer(&aurora_poll_timer); +#endif + +#ifdef AURORA_ALLIRQ + for(i=0;i<AURORA_ALLIRQ;i++){ + free_irq(allirq[i]|0x30, bp); +/* IRQ_to_board[allirq[i]&0xf] = NULL;*/ + } +#else + free_irq(bp->irq|0x30, bp); +/* IRQ_to_board[bp->irq&0xf] = NULL;*/ +#endif + /* Drop all DTR's */ + for(i=0;i<16;i++){ + sbus_writeb(i & 7, &bp->r[i>>3]->r[CD180_CAR]); + udelay(1); + sbus_writeb(0, &bp->r[i>>3]->r[CD180_MSVR]); + udelay(1); + } + /* Board shutdown */ + sbus_writeb(0, &bp->r0->r); + +#ifdef AURORA_DEBUG + printk("aurora_shutdown_board: end\n"); +#endif +} + +/* Setting up port characteristics. + * Must be called with disabled interrupts + */ +static void aurora_change_speed(struct Aurora_board *bp, struct Aurora_port *port) +{ + struct tty_struct *tty; + unsigned long baud; + long tmp; + unsigned char cor1 = 0, cor3 = 0; + unsigned char mcor1 = 0, mcor2 = 0,chip; + +#ifdef AURORA_DEBUG + printk("aurora_change_speed: start\n"); +#endif + if (!(tty = port->tty) || !tty->termios) + return; + + chip = AURORA_CD180(port_No(port)); + + port->SRER = 0; + port->COR2 = 0; + port->MSVR = MSVR_RTS|MSVR_DTR; + + baud = tty_get_baud_rate(tty); + + /* Select port on the board */ + sbus_writeb(port_No(port) & 7, + &bp->r[chip]->r[CD180_CAR]); + udelay(1); + + if (!baud) { + /* Drop DTR & exit */ + port->MSVR &= ~(bp->DTR|bp->RTS); + sbus_writeb(port->MSVR, + &bp->r[chip]->r[CD180_MSVR]); + return; + } else { + /* Set DTR on */ + port->MSVR |= bp->DTR; + sbus_writeb(port->MSVR, + &bp->r[chip]->r[CD180_MSVR]); + } + + /* Now we must calculate some speed dependent things. */ + + /* Set baud rate for port. */ + tmp = (((bp->oscfreq + baud/2) / baud + + CD180_TPC/2) / CD180_TPC); + +/* tmp = (bp->oscfreq/7)/baud; + if((tmp%10)>4)tmp=tmp/10+1;else tmp=tmp/10;*/ +/* printk("Prescaler period: %d\n",tmp);*/ + + sbus_writeb((tmp >> 8) & 0xff, + &bp->r[chip]->r[CD180_RBPRH]); + sbus_writeb((tmp >> 8) & 0xff, + &bp->r[chip]->r[CD180_TBPRH]); + sbus_writeb(tmp & 0xff, &bp->r[chip]->r[CD180_RBPRL]); + sbus_writeb(tmp & 0xff, &bp->r[chip]->r[CD180_TBPRL]); + + 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 = (AURORA_TPS + AURORA_TPS/2 + baud/2) / baud; + tmp = (tmp > 0xff) ? 0xff : tmp; + sbus_writeb(tmp, &bp->r[chip]->r[CD180_RTPR]); + + 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 AURORA_BRAIN_DAMAGED_CTS + port->SRER |= SRER_DSR | SRER_CTS; + mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD; + mcor2 |= MCOR2_DSROD | MCOR2_CTSOD; + tty->hw_stopped = !(aurora_in(bp, CD180_MSVR) & (MSVR_CTS|MSVR_DSR)); +#else*/ + port->COR2 |= COR2_CTSAE; +/*#endif*/ + if (bp->flags&AURORA_BOARD_DTR_FLOW_OK) { + mcor1 |= AURORA_RXTH; + } + } + /* 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; + sbus_writeb(START_CHAR(tty), + &bp->r[chip]->r[CD180_SCHR1]); + sbus_writeb(STOP_CHAR(tty), + &bp->r[chip]->r[CD180_SCHR2]); + sbus_writeb(START_CHAR(tty), + &bp->r[chip]->r[CD180_SCHR3]); + sbus_writeb(STOP_CHAR(tty), + &bp->r[chip]->r[CD180_SCHR4]); + } + if (!C_CLOCAL(tty)) { + /* Enable CD check */ + port->SRER |= SRER_CD; + mcor1 |= MCOR1_CDZD; + mcor2 |= MCOR2_CDOD; + } + + if (C_CREAD(tty)) + /* Enable receiver */ + port->SRER |= SRER_RXD; + + /* Set input FIFO size (1-8 bytes) */ + cor3 |= AURORA_RXFIFO; + /* Setting up CD180 channel registers */ + sbus_writeb(cor1, &bp->r[chip]->r[CD180_COR1]); + sbus_writeb(port->COR2, &bp->r[chip]->r[CD180_COR2]); + sbus_writeb(cor3, &bp->r[chip]->r[CD180_COR3]); + /* Make CD180 know about registers change */ + aurora_wait_CCR(bp->r[chip]); + sbus_writeb(CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3, + &bp->r[chip]->r[CD180_CCR]); + /* Setting up modem option registers */ + sbus_writeb(mcor1, &bp->r[chip]->r[CD180_MCOR1]); + sbus_writeb(mcor2, &bp->r[chip]->r[CD180_MCOR2]); + /* Enable CD180 transmitter & receiver */ + aurora_wait_CCR(bp->r[chip]); + sbus_writeb(CCR_TXEN | CCR_RXEN, &bp->r[chip]->r[CD180_CCR]); + /* Enable interrupts */ + sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]); + /* And finally set RTS on */ + sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]); +#ifdef AURORA_DEBUG + printk("aurora_change_speed: end\n"); +#endif +} + +/* Must be called with interrupts enabled */ +static int aurora_setup_port(struct Aurora_board *bp, struct Aurora_port *port) +{ + unsigned long flags; + +#ifdef AURORA_DEBUG + printk("aurora_setup_port: start %d\n",port_No(port)); +#endif + if (port->flags & ASYNC_INITIALIZED) + return 0; + + if (!port->xmit_buf) { + /* We may sleep in get_zeroed_page() */ + unsigned long tmp; + + if (!(tmp = get_zeroed_page(GFP_KERNEL))) + return -ENOMEM; + + if (port->xmit_buf) { + free_page(tmp); + return -ERESTARTSYS; + } + port->xmit_buf = (unsigned char *) tmp; + } + + save_flags(flags); cli(); + + if (port->tty) + clear_bit(TTY_IO_ERROR, &port->tty->flags); + +#ifdef MODULE + if ((port->count == 1) && ((++bp->count) == 1)) + bp->flags |= AURORA_BOARD_ACTIVE; +#endif + + port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; + aurora_change_speed(bp, port); + port->flags |= ASYNC_INITIALIZED; + + restore_flags(flags); +#ifdef AURORA_DEBUG + printk("aurora_setup_port: end\n"); +#endif + return 0; +} + +/* Must be called with interrupts disabled */ +static void aurora_shutdown_port(struct Aurora_board *bp, struct Aurora_port *port) +{ + struct tty_struct *tty; + unsigned char chip; + +#ifdef AURORA_DEBUG + printk("aurora_shutdown_port: start\n"); +#endif + if (!(port->flags & ASYNC_INITIALIZED)) + return; + + chip = AURORA_CD180(port_No(port)); + +#ifdef AURORA_REPORT_OVERRUN + printk("aurora%d: port %d: Total %ld overruns were detected.\n", + board_No(bp), port_No(port), port->overrun); +#endif +#ifdef AURORA_REPORT_FIFO + { + int i; + + printk("aurora%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 + if (port->xmit_buf) { + free_page((unsigned long) port->xmit_buf); + port->xmit_buf = NULL; + } + + if (!(tty = port->tty) || C_HUPCL(tty)) { + /* Drop DTR */ + port->MSVR &= ~(bp->DTR|bp->RTS); + sbus_writeb(port->MSVR, + &bp->r[chip]->r[CD180_MSVR]); + } + + /* Select port */ + sbus_writeb(port_No(port) & 7, + &bp->r[chip]->r[CD180_CAR]); + udelay(1); + + /* Reset port */ + aurora_wait_CCR(bp->r[chip]); + sbus_writeb(CCR_SOFTRESET, &bp->r[chip]->r[CD180_CCR]); + + /* Disable all interrupts from this port */ + port->SRER = 0; + sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]); + + if (tty) + set_bit(TTY_IO_ERROR, &tty->flags); + port->flags &= ~ASYNC_INITIALIZED; + +#ifdef MODULE + if (--bp->count < 0) { + printk(KERN_DEBUG "aurora%d: aurora_shutdown_port: " + "bad board count: %d\n", + board_No(bp), bp->count); + bp->count = 0; + } + + if (!bp->count) + bp->flags &= ~AURORA_BOARD_ACTIVE; +#endif + +#ifdef AURORA_DEBUG + printk("aurora_shutdown_port: end\n"); +#endif +} + + +static int block_til_ready(struct tty_struct *tty, struct file * filp, + struct Aurora_port *port) +{ + DECLARE_WAITQUEUE(wait, current); + struct Aurora_board *bp = port_Board(port); + int retval; + int do_clocal = 0; + int CD; + unsigned char chip; + +#ifdef AURORA_DEBUG + printk("block_til_ready: start\n"); +#endif + chip = AURORA_CD180(port_No(port)); + + /* If the device is in the middle of being closed, then block + * until it's done, and then try again. + */ + if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { + interruptible_sleep_on(&port->close_wait); + if (port->flags & ASYNC_HUP_NOTIFY) + return -EAGAIN; + else + return -ERESTARTSYS; + } + + /* If non-blocking mode is set, or the port is not enabled, + * then make the check up front and then exit. + */ + if ((filp->f_flags & O_NONBLOCK) || + (tty->flags & (1 << TTY_IO_ERROR))) { + port->flags |= ASYNC_NORMAL_ACTIVE; + return 0; + } + + if (C_CLOCAL(tty)) + do_clocal = 1; + + /* Block waiting for the 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 + * rs_close() knows when to free things. We restore it upon + * exit, either normal or abnormal. + */ + retval = 0; + add_wait_queue(&port->open_wait, &wait); + cli(); + if (!tty_hung_up_p(filp)) + port->count--; + sti(); + port->blocked_open++; + while (1) { + cli(); + sbus_writeb(port_No(port) & 7, + &bp->r[chip]->r[CD180_CAR]); + udelay(1); + CD = sbus_readb(&bp->r[chip]->r[CD180_MSVR]) & MSVR_CD; + port->MSVR=bp->RTS; + + /* auto drops DTR */ + sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]); + sti(); + set_current_state(TASK_INTERRUPTIBLE); + if (tty_hung_up_p(filp) || + !(port->flags & ASYNC_INITIALIZED)) { + if (port->flags & ASYNC_HUP_NOTIFY) + retval = -EAGAIN; + else + retval = -ERESTARTSYS; + break; + } + if (!(port->flags & ASYNC_CLOSING) && + (do_clocal || CD)) + break; + if (signal_pending(current)) { + retval = -ERESTARTSYS; + break; + } + schedule(); + } + current->state = TASK_RUNNING; + remove_wait_queue(&port->open_wait, &wait); + if (!tty_hung_up_p(filp)) + port->count++; + port->blocked_open--; + if (retval) + return retval; + + port->flags |= ASYNC_NORMAL_ACTIVE; +#ifdef AURORA_DEBUG + printk("block_til_ready: end\n"); +#endif + return 0; +} + +static int aurora_open(struct tty_struct * tty, struct file * filp) +{ + int board; + int error; + struct Aurora_port * port; + struct Aurora_board * bp; + unsigned long flags; + +#ifdef AURORA_DEBUG + printk("aurora_open: start\n"); +#endif + + board = AURORA_BOARD(tty->index); + if (board > AURORA_NBOARD || + !(aurora_board[board].flags & AURORA_BOARD_PRESENT)) { +#ifdef AURORA_DEBUG + printk("aurora_open: error board %d present %d\n", + board, aurora_board[board].flags & AURORA_BOARD_PRESENT); +#endif + return -ENODEV; + } + + bp = &aurora_board[board]; + port = aurora_port + board * AURORA_NPORT * AURORA_NCD180 + AURORA_PORT(tty->index); + if ((aurora_paranoia_check(port, tty->name, "aurora_open")) { +#ifdef AURORA_DEBUG + printk("aurora_open: error paranoia check\n"); +#endif + return -ENODEV; + } + + port->count++; + tty->driver_data = port; + port->tty = tty; + + if ((error = aurora_setup_port(bp, port))) { +#ifdef AURORA_DEBUG + printk("aurora_open: error aurora_setup_port ret %d\n",error); +#endif + return error; + } + + if ((error = block_til_ready(tty, filp, port))) { +#ifdef AURORA_DEBUG + printk("aurora_open: error block_til_ready ret %d\n",error); +#endif + return error; + } + +#ifdef AURORA_DEBUG + printk("aurora_open: end\n"); +#endif + return 0; +} + +static void aurora_close(struct tty_struct * tty, struct file * filp) +{ + struct Aurora_port *port = (struct Aurora_port *) tty->driver_data; + struct Aurora_board *bp; + unsigned long flags; + unsigned long timeout; + unsigned char chip; + +#ifdef AURORA_DEBUG + printk("aurora_close: start\n"); +#endif + + if (!port || (aurora_paranoia_check(port, tty->name, "close")) + return; + + chip = AURORA_CD180(port_No(port)); + + save_flags(flags); cli(); + if (tty_hung_up_p(filp)) { + restore_flags(flags); + return; + } + + bp = port_Board(port); + if ((tty->count == 1) && (port->count != 1)) { + printk(KERN_DEBUG "aurora%d: aurora_close: bad port count; " + "tty->count is 1, port count is %d\n", + board_No(bp), port->count); + port->count = 1; + } + if (--port->count < 0) { + printk(KERN_DEBUG "aurora%d: aurora_close: bad port " + "count for tty%d: %d\n", + board_No(bp), port_No(port), port->count); + port->count = 0; + } + if (port->count) { + restore_flags(flags); + return; + } + port->flags |= ASYNC_CLOSING; + + /* Now we wait for the transmit buffer to clear; and we notify + * the line discipline to only process XON/XOFF characters. + */ + tty->closing = 1; + if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE){ +#ifdef AURORA_DEBUG + printk("aurora_close: waiting to flush...\n"); +#endif + tty_wait_until_sent(tty, port->closing_wait); + } + + /* 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. + */ + port->SRER &= ~SRER_RXD; + if (port->flags & ASYNC_INITIALIZED) { + port->SRER &= ~SRER_TXRDY; + port->SRER |= SRER_TXEMPTY; + sbus_writeb(port_No(port) & 7, + &bp->r[chip]->r[CD180_CAR]); + udelay(1); + sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]); + /* + * 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(port->SRER & SRER_TXEMPTY) { + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(port->timeout); + if (time_after(jiffies, timeout)) + break; + } + } +#ifdef AURORA_DEBUG + printk("aurora_close: shutdown_port\n"); +#endif + aurora_shutdown_port(bp, port); + if (tty->driver->flush_buffer) + tty->driver->flush_buffer(tty); + tty_ldisc_flush(tty); + tty->closing = 0; + port->event = 0; + port->tty = 0; + if (port->blocked_open) { + if (port->close_delay) { + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(port->close_delay); + } + wake_up_interruptible(&port->open_wait); + } + port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); + wake_up_interruptible(&port->close_wait); + restore_flags(flags); +#ifdef AURORA_DEBUG + printk("aurora_close: end\n"); +#endif +} + +static int aurora_write(struct tty_struct * tty, + const unsigned char *buf, int count) +{ + struct Aurora_port *port = (struct Aurora_port *) tty->driver_data; + struct Aurora_board *bp; + int c, total = 0; + unsigned long flags; + unsigned char chip; + +#ifdef AURORA_DEBUG + printk("aurora_write: start %d\n",count); +#endif + if ((aurora_paranoia_check(port, tty->name, "aurora_write")) + return 0; + + chip = AURORA_CD180(port_No(port)); + + bp = port_Board(port); + + if (!tty || !port->xmit_buf || !tmp_buf) + return 0; + + save_flags(flags); + while (1) { + cli(); + c = MIN(count, MIN(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, + SERIAL_XMIT_SIZE - port->xmit_head)); + if (c <= 0) { + restore_flags(flags); + break; + } + memcpy(port->xmit_buf + port->xmit_head, buf, c); + port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1); + port->xmit_cnt += c; + restore_flags(flags); + + buf += c; + count -= c; + total += c; + } + + cli(); + if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped && + !(port->SRER & SRER_TXRDY)) { + port->SRER |= SRER_TXRDY; + sbus_writeb(port_No(port) & 7, + &bp->r[chip]->r[CD180_CAR]); + udelay(1); + sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]); + } + restore_flags(flags); +#ifdef AURORA_DEBUG + printk("aurora_write: end %d\n",total); +#endif + return total; +} + +static void aurora_put_char(struct tty_struct * tty, unsigned char ch) +{ + struct Aurora_port *port = (struct Aurora_port *) tty->driver_data; + unsigned long flags; + +#ifdef AURORA_DEBUG + printk("aurora_put_char: start %c\n",ch); +#endif + if ((aurora_paranoia_check(port, tty->name, "aurora_put_char")) + return; + + if (!tty || !port->xmit_buf) + return; + + save_flags(flags); cli(); + + if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) { + restore_flags(flags); + return; + } + + port->xmit_buf[port->xmit_head++] = ch; + port->xmit_head &= SERIAL_XMIT_SIZE - 1; + port->xmit_cnt++; + restore_flags(flags); +#ifdef AURORA_DEBUG + printk("aurora_put_char: end\n"); +#endif +} + +static void aurora_flush_chars(struct tty_struct * tty) +{ + struct Aurora_port *port = (struct Aurora_port *) tty->driver_data; + unsigned long flags; + unsigned char chip; + +/*#ifdef AURORA_DEBUG + printk("aurora_flush_chars: start\n"); +#endif*/ + if ((aurora_paranoia_check(port, tty->name, "aurora_flush_chars")) + return; + + chip = AURORA_CD180(port_No(port)); + + if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || + !port->xmit_buf) + return; + + save_flags(flags); cli(); + port->SRER |= SRER_TXRDY; + sbus_writeb(port_No(port) & 7, + &port_Board(port)->r[chip]->r[CD180_CAR]); + udelay(1); + sbus_writeb(port->SRER, + &port_Board(port)->r[chip]->r[CD180_SRER]); + restore_flags(flags); +/*#ifdef AURORA_DEBUG + printk("aurora_flush_chars: end\n"); +#endif*/ +} + +static int aurora_write_room(struct tty_struct * tty) +{ + struct Aurora_port *port = (struct Aurora_port *) tty->driver_data; + int ret; + +#ifdef AURORA_DEBUG + printk("aurora_write_room: start\n"); +#endif + if ((aurora_paranoia_check(port, tty->name, "aurora_write_room")) + return 0; + + ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; + if (ret < 0) + ret = 0; +#ifdef AURORA_DEBUG + printk("aurora_write_room: end\n"); +#endif + return ret; +} + +static int aurora_chars_in_buffer(struct tty_struct *tty) +{ + struct Aurora_port *port = (struct Aurora_port *) tty->driver_data; + + if ((aurora_paranoia_check(port, tty->name, "aurora_chars_in_buffer")) + return 0; + + return port->xmit_cnt; +} + +static void aurora_flush_buffer(struct tty_struct *tty) +{ + struct Aurora_port *port = (struct Aurora_port *) tty->driver_data; + unsigned long flags; + +#ifdef AURORA_DEBUG + printk("aurora_flush_buffer: start\n"); +#endif + if ((aurora_paranoia_check(port, tty->name, "aurora_flush_buffer")) + return; + + save_flags(flags); cli(); + port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; + restore_flags(flags); + + tty_wakeup(tty); +#ifdef AURORA_DEBUG + printk("aurora_flush_buffer: end\n"); +#endif +} + +static int aurora_tiocmget(struct tty_struct *tty, struct file *file) +{ + struct Aurora_port *port = (struct Aurora_port *) tty->driver_data; + struct Aurora_board * bp; + unsigned char status,chip; + unsigned int result; + unsigned long flags; + +#ifdef AURORA_DEBUG + printk("aurora_get_modem_info: start\n"); +#endif + if ((aurora_paranoia_check(port, tty->name, __FUNCTION__)) + return -ENODEV; + + chip = AURORA_CD180(port_No(port)); + + bp = port_Board(port); + + save_flags(flags); cli(); + + sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]); + udelay(1); + + status = sbus_readb(&bp->r[chip]->r[CD180_MSVR]); + result = 0/*bp->r[chip]->r[AURORA_RI] & (1u << port_No(port)) ? 0 : TIOCM_RNG*/; + + restore_flags(flags); + + result |= ((status & bp->RTS) ? TIOCM_RTS : 0) + | ((status & bp->DTR) ? TIOCM_DTR : 0) + | ((status & MSVR_CD) ? TIOCM_CAR : 0) + | ((status & MSVR_DSR) ? TIOCM_DSR : 0) + | ((status & MSVR_CTS) ? TIOCM_CTS : 0); + +#ifdef AURORA_DEBUG + printk("aurora_get_modem_info: end\n"); +#endif + return result; +} + +static int aurora_tiocmset(struct tty_struct *tty, struct file *file, + unsigned int set, unsigned int clear) +{ + struct Aurora_port *port = (struct Aurora_port *) tty->driver_data; + unsigned int arg; + unsigned long flags; + struct Aurora_board *bp = port_Board(port); + unsigned char chip; + +#ifdef AURORA_DEBUG + printk("aurora_set_modem_info: start\n"); +#endif + if ((aurora_paranoia_check(port, tty->name, __FUNCTION__)) + return -ENODEV; + + chip = AURORA_CD180(port_No(port)); + + save_flags(flags); cli(); + if (set & TIOCM_RTS) + port->MSVR |= bp->RTS; + if (set & TIOCM_DTR) + port->MSVR |= bp->DTR; + if (clear & TIOCM_RTS) + port->MSVR &= ~bp->RTS; + if (clear & TIOCM_DTR) + port->MSVR &= ~bp->DTR; + + sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]); + udelay(1); + + sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]); + + restore_flags(flags); +#ifdef AURORA_DEBUG + printk("aurora_set_modem_info: end\n"); +#endif + return 0; +} + +static void aurora_send_break(struct Aurora_port * port, unsigned long length) +{ + struct Aurora_board *bp = port_Board(port); + unsigned long flags; + unsigned char chip; + +#ifdef AURORA_DEBUG + printk("aurora_send_break: start\n"); +#endif + chip = AURORA_CD180(port_No(port)); + + save_flags(flags); cli(); + + port->break_length = AURORA_TPS / HZ * length; + port->COR2 |= COR2_ETC; + port->SRER |= SRER_TXRDY; + sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]); + udelay(1); + + sbus_writeb(port->COR2, &bp->r[chip]->r[CD180_COR2]); + sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]); + aurora_wait_CCR(bp->r[chip]); + + sbus_writeb(CCR_CORCHG2, &bp->r[chip]->r[CD180_CCR]); + aurora_wait_CCR(bp->r[chip]); + + restore_flags(flags); +#ifdef AURORA_DEBUG + printk("aurora_send_break: end\n"); +#endif +} + +static int aurora_set_serial_info(struct Aurora_port * port, + struct serial_struct * newinfo) +{ + struct serial_struct tmp; + struct Aurora_board *bp = port_Board(port); + int change_speed; + unsigned long flags; + +#ifdef AURORA_DEBUG + printk("aurora_set_serial_info: start\n"); +#endif + if (copy_from_user(&tmp, newinfo, sizeof(tmp))) + return -EFAULT; +#if 0 + if ((tmp.irq != bp->irq) || + (tmp.port != bp->base) || + (tmp.type != PORT_CIRRUS) || + (tmp.baud_base != (bp->oscfreq + CD180_TPC/2) / CD180_TPC) || + (tmp.custom_divisor != 0) || + (tmp.xmit_fifo_size != CD180_NFIFO) || + (tmp.flags & ~AURORA_LEGAL_FLAGS)) + return -EINVAL; +#endif + + change_speed = ((port->flags & ASYNC_SPD_MASK) != + (tmp.flags & ASYNC_SPD_MASK)); + + if (!capable(CAP_SYS_ADMIN)) { + if ((tmp.close_delay != port->close_delay) || + (tmp.closing_wait != port->closing_wait) || + ((tmp.flags & ~ASYNC_USR_MASK) != + (port->flags & ~ASYNC_USR_MASK))) + return -EPERM; + port->flags = ((port->flags & ~ASYNC_USR_MASK) | + (tmp.flags & ASYNC_USR_MASK)); + } else { + port->flags = ((port->flags & ~ASYNC_FLAGS) | + (tmp.flags & ASYNC_FLAGS)); + port->close_delay = tmp.close_delay; + port->closing_wait = tmp.closing_wait; + } + if (change_speed) { + save_flags(flags); cli(); + aurora_change_speed(bp, port); + restore_flags(flags); + } +#ifdef AURORA_DEBUG + printk("aurora_set_serial_info: end\n"); +#endif + return 0; +} + +extern int aurora_get_serial_info(struct Aurora_port * port, + struct serial_struct * retinfo) +{ + struct serial_struct tmp; + struct Aurora_board *bp = port_Board(port); + +#ifdef AURORA_DEBUG + printk("aurora_get_serial_info: start\n"); +#endif + if (!access_ok(VERIFY_WRITE, (void *) retinfo, sizeof(tmp))) + return -EFAULT; + + memset(&tmp, 0, sizeof(tmp)); + tmp.type = PORT_CIRRUS; + tmp.line = port - aurora_port; + tmp.port = 0; + tmp.irq = bp->irq; + tmp.flags = port->flags; + tmp.baud_base = (bp->oscfreq + CD180_TPC/2) / CD180_TPC; + tmp.close_delay = port->close_delay * HZ/100; + tmp.closing_wait = port->closing_wait * HZ/100; + tmp.xmit_fifo_size = CD180_NFIFO; + copy_to_user(retinfo, &tmp, sizeof(tmp)); +#ifdef AURORA_DEBUG +printk("aurora_get_serial_info: end\n"); +#endif + return 0; +} + +static int aurora_ioctl(struct tty_struct * tty, struct file * filp, + unsigned int cmd, unsigned long arg) + +{ + struct Aurora_port *port = (struct Aurora_port *) tty->driver_data; + int retval; + +#ifdef AURORA_DEBUG + printk("aurora_ioctl: start\n"); +#endif + if ((aurora_paranoia_check(port, tty->name, "aurora_ioctl")) + return -ENODEV; + + switch (cmd) { + case TCSBRK: /* SVID version: non-zero arg --> no break */ + retval = tty_check_change(tty); + if (retval) + return retval; + tty_wait_until_sent(tty, 0); + if (!arg) + aurora_send_break(port, HZ/4); /* 1/4 second */ + return 0; + case TCSBRKP: /* support for POSIX tcsendbreak() */ + retval = tty_check_change(tty); + if (retval) + return retval; + tty_wait_until_sent(tty, 0); + aurora_send_break(port, arg ? arg*(HZ/10) : HZ/4); + return 0; + case TIOCGSOFTCAR: + return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long *)arg); + case TIOCSSOFTCAR: + if (get_user(arg,(unsigned long *)arg)) + return -EFAULT; + tty->termios->c_cflag = + ((tty->termios->c_cflag & ~CLOCAL) | + (arg ? CLOCAL : 0)); + return 0; + case TIOCGSERIAL: + return aurora_get_serial_info(port, (struct serial_struct *) arg); + case TIOCSSERIAL: + return aurora_set_serial_info(port, (struct serial_struct *) arg); + default: + return -ENOIOCTLCMD; + }; +#ifdef AURORA_DEBUG + printk("aurora_ioctl: end\n"); +#endif + return 0; +} + +static void aurora_throttle(struct tty_struct * tty) +{ + struct Aurora_port *port = (struct Aurora_port *) tty->driver_data; + struct Aurora_board *bp; + unsigned long flags; + unsigned char chip; + +#ifdef AURORA_DEBUG + printk("aurora_throttle: start\n"); +#endif + if ((aurora_paranoia_check(port, tty->name, "aurora_throttle")) + return; + + bp = port_Board(port); + chip = AURORA_CD180(port_No(port)); + + save_flags(flags); cli(); + port->MSVR &= ~bp->RTS; + sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]); + udelay(1); + if (I_IXOFF(tty)) { + aurora_wait_CCR(bp->r[chip]); + sbus_writeb(CCR_SSCH2, &bp->r[chip]->r[CD180_CCR]); + aurora_wait_CCR(bp->r[chip]); + } + sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]); + restore_flags(flags); +#ifdef AURORA_DEBUG + printk("aurora_throttle: end\n"); +#endif +} + +static void aurora_unthrottle(struct tty_struct * tty) +{ + struct Aurora_port *port = (struct Aurora_port *) tty->driver_data; + struct Aurora_board *bp; + unsigned long flags; + unsigned char chip; + +#ifdef AURORA_DEBUG + printk("aurora_unthrottle: start\n"); +#endif + if ((aurora_paranoia_check(port, tty->name, "aurora_unthrottle")) + return; + + bp = port_Board(port); + + chip = AURORA_CD180(port_No(port)); + + save_flags(flags); cli(); + port->MSVR |= bp->RTS; + sbus_writeb(port_No(port) & 7, + &bp->r[chip]->r[CD180_CAR]); + udelay(1); + if (I_IXOFF(tty)) { + aurora_wait_CCR(bp->r[chip]); + sbus_writeb(CCR_SSCH1, + &bp->r[chip]->r[CD180_CCR]); + aurora_wait_CCR(bp->r[chip]); + } + sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]); + restore_flags(flags); +#ifdef AURORA_DEBUG + printk("aurora_unthrottle: end\n"); +#endif +} + +static void aurora_stop(struct tty_struct * tty) +{ + struct Aurora_port *port = (struct Aurora_port *) tty->driver_data; + struct Aurora_board *bp; + unsigned long flags; + unsigned char chip; + +#ifdef AURORA_DEBUG + printk("aurora_stop: start\n"); +#endif + if ((aurora_paranoia_check(port, tty->name, "aurora_stop")) + return; + + bp = port_Board(port); + + chip = AURORA_CD180(port_No(port)); + + save_flags(flags); cli(); + port->SRER &= ~SRER_TXRDY; + sbus_writeb(port_No(port) & 7, + &bp->r[chip]->r[CD180_CAR]); + udelay(1); + sbus_writeb(port->SRER, + &bp->r[chip]->r[CD180_SRER]); + restore_flags(flags); +#ifdef AURORA_DEBUG + printk("aurora_stop: end\n"); +#endif +} + +static void aurora_start(struct tty_struct * tty) +{ + struct Aurora_port *port = (struct Aurora_port *) tty->driver_data; + struct Aurora_board *bp; + unsigned long flags; + unsigned char chip; + +#ifdef AURORA_DEBUG + printk("aurora_start: start\n"); +#endif + if ((aurora_paranoia_check(port, tty->name, "aurora_start")) + return; + + bp = port_Board(port); + + chip = AURORA_CD180(port_No(port)); + + save_flags(flags); cli(); + if (port->xmit_cnt && port->xmit_buf && !(port->SRER & SRER_TXRDY)) { + port->SRER |= SRER_TXRDY; + sbus_writeb(port_No(port) & 7, + &bp->r[chip]->r[CD180_CAR]); + udelay(1); + sbus_writeb(port->SRER, + &bp->r[chip]->r[CD180_SRER]); + } + restore_flags(flags); +#ifdef AURORA_DEBUG + printk("aurora_start: end\n"); +#endif +} + +/* + * This routine is called from the scheduler tqueue when the interrupt + * routine has signalled that a hangup has occurred. The path of + * hangup processing is: + * + * serial interrupt routine -> (scheduler tqueue) -> + * do_aurora_hangup() -> tty->hangup() -> aurora_hangup() + * + */ +static void do_aurora_hangup(void *private_) +{ + struct Aurora_port *port = (struct Aurora_port *) private_; + struct tty_struct *tty; + +#ifdef AURORA_DEBUG + printk("do_aurora_hangup: start\n"); +#endif + tty = port->tty; + if (tty != NULL) { + tty_hangup(tty); /* FIXME: module removal race - AKPM */ +#ifdef AURORA_DEBUG + printk("do_aurora_hangup: end\n"); +#endif + } +} + +static void aurora_hangup(struct tty_struct * tty) +{ + struct Aurora_port *port = (struct Aurora_port *) tty->driver_data; + struct Aurora_board *bp; + +#ifdef AURORA_DEBUG + printk("aurora_hangup: start\n"); +#endif + if ((aurora_paranoia_check(port, tty->name, "aurora_hangup")) + return; + + bp = port_Board(port); + + aurora_shutdown_port(bp, port); + port->event = 0; + port->count = 0; + port->flags &= ~ASYNC_NORMAL_ACTIVE; + port->tty = 0; + wake_up_interruptible(&port->open_wait); +#ifdef AURORA_DEBUG + printk("aurora_hangup: end\n"); +#endif +} + +static void aurora_set_termios(struct tty_struct * tty, struct termios * old_termios) +{ + struct Aurora_port *port = (struct Aurora_port *) tty->driver_data; + unsigned long flags; + +#ifdef AURORA_DEBUG + printk("aurora_set_termios: start\n"); +#endif + if ((aurora_paranoia_check(port, tty->name, "aurora_set_termios")) + return; + + if (tty->termios->c_cflag == old_termios->c_cflag && + tty->termios->c_iflag == old_termios->c_iflag) + return; + + save_flags(flags); cli(); + aurora_change_speed(port_Board(port), port); + restore_flags(flags); + + if ((old_termios->c_cflag & CRTSCTS) && + !(tty->termios->c_cflag & CRTSCTS)) { + tty->hw_stopped = 0; + aurora_start(tty); + } +#ifdef AURORA_DEBUG + printk("aurora_set_termios: end\n"); +#endif +} + +static void do_aurora_bh(void) +{ + run_task_queue(&tq_aurora); +} + +static void do_softint(void *private_) +{ + struct Aurora_port *port = (struct Aurora_port *) private_; + struct tty_struct *tty; + +#ifdef AURORA_DEBUG + printk("do_softint: start\n"); +#endif + tty = port->tty; + if (tty == NULL) + return; + + if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) { + tty_wakeup(tty); + } +#ifdef AURORA_DEBUG + printk("do_softint: end\n"); +#endif +} + +static struct tty_operations aurora_ops = { + .open = aurora_open, + .close = aurora_close, + .write = aurora_write, + .put_char = aurora_put_char, + .flush_chars = aurora_flush_chars, + .write_room = aurora_write_room, + .chars_in_buffer = aurora_chars_in_buffer, + .flush_buffer = aurora_flush_buffer, + .ioctl = aurora_ioctl, + .throttle = aurora_throttle, + .unthrottle = aurora_unthrottle, + .set_termios = aurora_set_termios, + .stop = aurora_stop, + .start = aurora_start, + .hangup = aurora_hangup, + .tiocmget = aurora_tiocmget, + .tiocmset = aurora_tiocmset, +}; + +static int aurora_init_drivers(void) +{ + int error; + int i; + +#ifdef AURORA_DEBUG + printk("aurora_init_drivers: start\n"); +#endif + tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL); + if (tmp_buf == NULL) { + printk(KERN_ERR "aurora: Couldn't get free page.\n"); + return 1; + } + init_bh(AURORA_BH, do_aurora_bh); + aurora_driver = alloc_tty_driver(AURORA_INPORTS); + if (!aurora_driver) { + printk(KERN_ERR "aurora: Couldn't allocate tty driver.\n"); + free_page((unsigned long) tmp_buf); + return 1; + } + aurora_driver->owner = THIS_MODULE; + aurora_driver->name = "ttyA"; + aurora_driver->major = AURORA_MAJOR; + aurora_driver->type = TTY_DRIVER_TYPE_SERIAL; + aurora_driver->subtype = SERIAL_TYPE_NORMAL; + aurora_driver->init_termios = tty_std_termios; + aurora_driver->init_termios.c_cflag = + B9600 | CS8 | CREAD | HUPCL | CLOCAL; + aurora_driver->flags = TTY_DRIVER_REAL_RAW; + tty_set_operations(aurora_driver, &aurora_ops); + error = tty_register_driver(aurora_driver); + if (error) { + put_tty_driver(aurora_driver); + free_page((unsigned long) tmp_buf); + printk(KERN_ERR "aurora: Couldn't register aurora driver, error = %d\n", + error); + return 1; + } + + memset(aurora_port, 0, sizeof(aurora_port)); + for (i = 0; i < AURORA_TNPORTS; i++) { + aurora_port[i].magic = AURORA_MAGIC; + aurora_port[i].tqueue.routine = do_softint; + aurora_port[i].tqueue.data = &aurora_port[i]; + aurora_port[i].tqueue_hangup.routine = do_aurora_hangup; + aurora_port[i].tqueue_hangup.data = &aurora_port[i]; + aurora_port[i].close_delay = 50 * HZ/100; + aurora_port[i].closing_wait = 3000 * HZ/100; + init_waitqueue_head(&aurora_port[i].open_wait); + init_waitqueue_head(&aurora_port[i].close_wait); + } +#ifdef AURORA_DEBUG + printk("aurora_init_drivers: end\n"); +#endif + return 0; +} + +static void aurora_release_drivers(void) +{ +#ifdef AURORA_DEBUG + printk("aurora_release_drivers: start\n"); +#endif + free_page((unsigned long)tmp_buf); + tty_unregister_driver(aurora_driver); + put_tty_driver(aurora_driver); +#ifdef AURORA_DEBUG + printk("aurora_release_drivers: end\n"); +#endif +} + +/* + * 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. + * + */ +void __init aurora_setup(char *str, int *ints) +{ + int i; + + for(i=0;(i<ints[0])&&(i<4);i++) { + if (ints[i+1]) irqs[i]=ints[i+1]; + } +} + +static int __init aurora_real_init(void) +{ + int found; + int i; + + printk(KERN_INFO "aurora: Driver starting.\n"); + if(aurora_init_drivers()) + return -EIO; + found = aurora_probe(); + if(!found) { + aurora_release_drivers(); + printk(KERN_INFO "aurora: No Aurora Multiport boards detected.\n"); + return -EIO; + } else { + printk(KERN_INFO "aurora: %d boards found.\n", found); + } + for (i = 0; i < found; i++) { + int ret = aurora_setup_board(&aurora_board[i]); + + if (ret) { +#ifdef AURORA_DEBUG + printk(KERN_ERR "aurora_init: error aurora_setup_board ret %d\n", + ret); +#endif + return ret; + } + } + return 0; +} + +int irq = 0; +int irq1 = 0; +int irq2 = 0; +int irq3 = 0; +module_param(irq , int, 0); +module_param(irq1, int, 0); +module_param(irq2, int, 0); +module_param(irq3, int, 0); + +static int __init aurora_init(void) +{ + if (irq ) irqs[0]=irq ; + if (irq1) irqs[1]=irq1; + if (irq2) irqs[2]=irq2; + if (irq3) irqs[3]=irq3; + return aurora_real_init(); +} + +static void __exit aurora_cleanup(void) +{ + int i; + +#ifdef AURORA_DEBUG +printk("cleanup_module: aurora_release_drivers\n"); +#endif + + aurora_release_drivers(); + for (i = 0; i < AURORA_NBOARD; i++) + if (aurora_board[i].flags & AURORA_BOARD_PRESENT) { + aurora_shutdown_board(&aurora_board[i]); + aurora_release_io_range(&aurora_board[i]); + } +} + +module_init(aurora_init); +module_exit(aurora_cleanup); +MODULE_LICENSE("GPL"); |
