| /* |
| * 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. |
| * |
| * Original driver code supplied by Multi-Tech |
| * |
| * Changes |
| * 1/9/98 alan@redhat.com Merge to 2.0.x kernel tree |
| * Obtain and use official major/minors |
| * Loader switched to a misc device |
| * (fixed range check bug as a side effect) |
| * Printk clean up |
| * 9/12/98 alan@redhat.com Rough port to 2.1.x |
| * |
| * 10/6/99 sameer Merged the ISA and PCI drivers to |
| * a new unified driver. |
| * |
| * 3/9/99 sameer Added support for ISI4616 cards. |
| * |
| * 16/9/99 sameer We do not force RTS low anymore. |
| * This is to prevent the firmware |
| * from getting confused. |
| * |
| * 26/10/99 sameer Cosmetic changes:The driver now |
| * dumps the Port Count information |
| * along with I/O address and IRQ. |
| * |
| * 13/12/99 sameer Fixed the problem with IRQ sharing. |
| * |
| * 10/5/00 sameer Fixed isicom_shutdown_board() |
| * to not lower DTR on all the ports |
| * when the last port on the card is |
| * closed. |
| * |
| * 10/5/00 sameer Signal mask setup command added |
| * to isicom_setup_port and |
| * isicom_shutdown_port. |
| * |
| * 24/5/00 sameer The driver is now SMP aware. |
| * |
| * |
| * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem |
| * |
| * |
| * 03/01/01 anil .s Added support for resetting the |
| * internal modems on ISI cards. |
| * |
| * 08/02/01 anil .s Upgraded the driver for kernel |
| * 2.4.x |
| * |
| * 11/04/01 Kevin Fixed firmware load problem with |
| * ISIHP-4X card |
| * |
| * 30/04/01 anil .s Fixed the remote login through |
| * ISI port problem. Now the link |
| * does not go down before password |
| * prompt. |
| * |
| * 03/05/01 anil .s Fixed the problem with IRQ sharing |
| * among ISI-PCI cards. |
| * |
| * 03/05/01 anil .s Added support to display the version |
| * info during insmod as well as module |
| * listing by lsmod. |
| * |
| * 10/05/01 anil .s Done the modifications to the source |
| * file and Install script so that the |
| * same installation can be used for |
| * 2.2.x and 2.4.x kernel. |
| * |
| * 06/06/01 anil .s Now we drop both dtr and rts during |
| * shutdown_port as well as raise them |
| * during isicom_config_port. |
| * |
| * 09/06/01 acme@conectiva.com.br use capable, not suser, do |
| * restore_flags on failure in |
| * isicom_send_break, verify put_user |
| * result |
| * |
| * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps |
| * Baud index extended to 21 |
| * |
| * 20/03/03 ranjeeth Made to work for Linux Advanced server. |
| * Taken care of license warning. |
| * |
| * 10/12/03 Ravindra Made to work for Fedora Core 1 of |
| * Red Hat Distribution |
| * |
| * 06/01/05 Alan Cox Merged the ISI and base kernel strands |
| * into a single 2.6 driver |
| * |
| * *********************************************************** |
| * |
| * To use this driver you also need the support package. You |
| * can find this in RPM format on |
| * ftp://ftp.linux.org.uk/pub/linux/alan |
| * |
| * You can find the original tools for this direct from Multitech |
| * ftp://ftp.multitech.com/ISI-Cards/ |
| * |
| * Having installed the cards the module options (/etc/modprobe.conf) |
| * |
| * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4 |
| * |
| * Omit those entries for boards you don't have installed. |
| * |
| * TODO |
| * Merge testing |
| * 64-bit verification |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/tty.h> |
| #include <linux/tty_flip.h> |
| #include <linux/termios.h> |
| #include <linux/fs.h> |
| #include <linux/sched.h> |
| #include <linux/serial.h> |
| #include <linux/mm.h> |
| #include <linux/miscdevice.h> |
| #include <linux/interrupt.h> |
| #include <linux/timer.h> |
| #include <linux/delay.h> |
| #include <linux/ioport.h> |
| |
| #include <asm/uaccess.h> |
| #include <asm/io.h> |
| #include <asm/system.h> |
| |
| #include <linux/pci.h> |
| |
| #include <linux/isicom.h> |
| |
| #define InterruptTheCard(base) outw(0, (base) + 0xc) |
| #define ClearInterrupt(base) inw((base) + 0x0a) |
| |
| #ifdef DEBUG |
| #define pr_dbg(str...) printk(KERN_DEBUG "ISICOM: " str) |
| #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c)) |
| #else |
| #define pr_dbg(str...) do { } while (0) |
| #define isicom_paranoia_check(a, b, c) 0 |
| #endif |
| |
| static int isicom_probe(struct pci_dev *, const struct pci_device_id *); |
| static void __devexit isicom_remove(struct pci_dev *); |
| |
| static struct pci_device_id isicom_pci_tbl[] = { |
| { PCI_DEVICE(VENDOR_ID, 0x2028) }, |
| { PCI_DEVICE(VENDOR_ID, 0x2051) }, |
| { PCI_DEVICE(VENDOR_ID, 0x2052) }, |
| { PCI_DEVICE(VENDOR_ID, 0x2053) }, |
| { PCI_DEVICE(VENDOR_ID, 0x2054) }, |
| { PCI_DEVICE(VENDOR_ID, 0x2055) }, |
| { PCI_DEVICE(VENDOR_ID, 0x2056) }, |
| { PCI_DEVICE(VENDOR_ID, 0x2057) }, |
| { PCI_DEVICE(VENDOR_ID, 0x2058) }, |
| { 0 } |
| }; |
| MODULE_DEVICE_TABLE(pci, isicom_pci_tbl); |
| |
| static struct pci_driver isicom_driver = { |
| .name = "isicom", |
| .id_table = isicom_pci_tbl, |
| .probe = isicom_probe, |
| .remove = __devexit_p(isicom_remove) |
| }; |
| |
| static int prev_card = 3; /* start servicing isi_card[0] */ |
| static struct tty_driver *isicom_normal; |
| |
| static struct timer_list tx; |
| static char re_schedule = 1; |
| |
| static int ISILoad_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); |
| |
| static void isicom_tx(unsigned long _data); |
| static void isicom_start(struct tty_struct *tty); |
| |
| /* baud index mappings from linux defns to isi */ |
| |
| static signed char linuxb_to_isib[] = { |
| -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19 |
| }; |
| |
| struct isi_board { |
| unsigned long base; |
| unsigned char irq; |
| unsigned char port_count; |
| unsigned short status; |
| unsigned short port_status; /* each bit represents a single port */ |
| unsigned short shift_count; |
| struct isi_port * ports; |
| signed char count; |
| unsigned char isa; |
| spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */ |
| unsigned long flags; |
| }; |
| |
| struct isi_port { |
| unsigned short magic; |
| unsigned int flags; |
| int count; |
| int blocked_open; |
| int close_delay; |
| u16 channel; |
| u16 status; |
| u16 closing_wait; |
| struct isi_board * card; |
| struct tty_struct * tty; |
| wait_queue_head_t close_wait; |
| wait_queue_head_t open_wait; |
| struct work_struct hangup_tq; |
| struct work_struct bh_tqueue; |
| unsigned char * xmit_buf; |
| int xmit_head; |
| int xmit_tail; |
| int xmit_cnt; |
| }; |
| |
| static struct isi_board isi_card[BOARD_COUNT]; |
| static struct isi_port isi_ports[PORT_COUNT]; |
| |
| /* |
| * Locking functions for card level locking. We need to own both |
| * the kernel lock for the card and have the card in a position that |
| * it wants to talk. |
| */ |
| |
| static int lock_card(struct isi_board *card) |
| { |
| char retries; |
| unsigned long base = card->base; |
| |
| for (retries = 0; retries < 100; retries++) { |
| spin_lock_irqsave(&card->card_lock, card->flags); |
| if (inw(base + 0xe) & 0x1) { |
| return 1; |
| } else { |
| spin_unlock_irqrestore(&card->card_lock, card->flags); |
| udelay(1000); /* 1ms */ |
| } |
| } |
| printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n", card->base); |
| return 0; /* Failed to aquire the card! */ |
| } |
| |
| static int lock_card_at_interrupt(struct isi_board *card) |
| { |
| unsigned char retries; |
| unsigned long base = card->base; |
| |
| for (retries = 0; retries < 200; retries++) { |
| spin_lock_irqsave(&card->card_lock, card->flags); |
| |
| if (inw(base + 0xe) & 0x1) |
| return 1; |
| else |
| spin_unlock_irqrestore(&card->card_lock, card->flags); |
| } |
| /* Failing in interrupt is an acceptable event */ |
| return 0; /* Failed to aquire the card! */ |
| } |
| |
| static void unlock_card(struct isi_board *card) |
| { |
| spin_unlock_irqrestore(&card->card_lock, card->flags); |
| } |
| |
| /* |
| * ISI Card specific ops ... |
| */ |
| |
| static void raise_dtr(struct isi_port *port) |
| { |
| struct isi_board *card = port->card; |
| unsigned long base = card->base; |
| u16 channel = port->channel; |
| |
| if (!lock_card(card)) |
| return; |
| |
| outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
| outw(0x0504, base); |
| InterruptTheCard(base); |
| port->status |= ISI_DTR; |
| unlock_card(card); |
| } |
| |
| static inline void drop_dtr(struct isi_port *port) |
| { |
| struct isi_board *card = port->card; |
| unsigned long base = card->base; |
| u16 channel = port->channel; |
| |
| if (!lock_card(card)) |
| return; |
| |
| outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
| outw(0x0404, base); |
| InterruptTheCard(base); |
| port->status &= ~ISI_DTR; |
| unlock_card(card); |
| } |
| |
| static inline void raise_rts(struct isi_port *port) |
| { |
| struct isi_board *card = port->card; |
| unsigned long base = card->base; |
| u16 channel = port->channel; |
| |
| if (!lock_card(card)) |
| return; |
| |
| outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
| outw(0x0a04, base); |
| InterruptTheCard(base); |
| port->status |= ISI_RTS; |
| unlock_card(card); |
| } |
| static inline void drop_rts(struct isi_port *port) |
| { |
| struct isi_board *card = port->card; |
| unsigned long base = card->base; |
| u16 channel = port->channel; |
| |
| if (!lock_card(card)) |
| return; |
| |
| outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
| outw(0x0804, base); |
| InterruptTheCard(base); |
| port->status &= ~ISI_RTS; |
| unlock_card(card); |
| } |
| |
| static inline void raise_dtr_rts(struct isi_port *port) |
| { |
| struct isi_board *card = port->card; |
| unsigned long base = card->base; |
| u16 channel = port->channel; |
| |
| if (!lock_card(card)) |
| return; |
| |
| outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
| outw(0x0f04, base); |
| InterruptTheCard(base); |
| port->status |= (ISI_DTR | ISI_RTS); |
| unlock_card(card); |
| } |
| |
| static void drop_dtr_rts(struct isi_port *port) |
| { |
| struct isi_board *card = port->card; |
| unsigned long base = card->base; |
| u16 channel = port->channel; |
| |
| if (!lock_card(card)) |
| return; |
| |
| outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
| outw(0x0c04, base); |
| InterruptTheCard(base); |
| port->status &= ~(ISI_RTS | ISI_DTR); |
| unlock_card(card); |
| } |
| |
| static inline void kill_queue(struct isi_port *port, short queue) |
| { |
| struct isi_board *card = port->card; |
| unsigned long base = card->base; |
| u16 channel = port->channel; |
| |
| if (!lock_card(card)) |
| return; |
| |
| outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
| outw((queue << 8) | 0x06, base); |
| InterruptTheCard(base); |
| unlock_card(card); |
| } |
| |
| |
| /* |
| * Firmware loader driver specific routines. This needs to mostly die |
| * and be replaced with request_firmware. |
| */ |
| |
| static struct file_operations ISILoad_fops = { |
| .owner = THIS_MODULE, |
| .ioctl = ISILoad_ioctl, |
| }; |
| |
| static struct miscdevice isiloader_device = { |
| ISILOAD_MISC_MINOR, "isictl", &ISILoad_fops |
| }; |
| |
| |
| static inline int WaitTillCardIsFree(unsigned long base) |
| { |
| unsigned long count=0; |
| while( (!(inw(base+0xe) & 0x1)) && (count++ < 6000000)); |
| if (inw(base+0xe)&0x1) |
| return 0; |
| else |
| return 1; |
| } |
| |
| static int ISILoad_ioctl(struct inode *inode, struct file *filp, |
| unsigned int cmd, unsigned long arg) |
| { |
| unsigned int card, i, j, signature, status, portcount = 0; |
| unsigned long t, base; |
| u16 word_count; |
| bin_frame frame; |
| void __user *argp = (void __user *)arg; |
| /* exec_record exec_rec; */ |
| |
| if (get_user(card, (int __user *)argp)) |
| return -EFAULT; |
| |
| if (card < 0 || card >= BOARD_COUNT) |
| return -ENXIO; |
| |
| base=isi_card[card].base; |
| |
| if (base==0) |
| return -ENXIO; /* disabled or not used */ |
| |
| switch(cmd) { |
| case MIOCTL_RESET_CARD: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| printk(KERN_DEBUG "ISILoad:Resetting Card%d at 0x%lx ",card+1,base); |
| |
| inw(base+0x8); |
| |
| for (t=jiffies+HZ/100;time_before(jiffies, t);); |
| |
| outw(0,base+0x8); /* Reset */ |
| |
| for (j=1;j<=3;j++) { |
| for (t=jiffies+HZ;time_before(jiffies, t);); |
| printk("."); |
| } |
| signature=(inw(base+0x4)) & 0xff; |
| if (isi_card[card].isa) { |
| |
| if (!(inw(base+0xe) & 0x1) || (inw(base+0x2))) { |
| #ifdef ISICOM_DEBUG |
| printk("\nbase+0x2=0x%x , base+0xe=0x%x",inw(base+0x2),inw(base+0xe)); |
| #endif |
| printk("\nISILoad:ISA Card%d reset failure (Possible bad I/O Port Address 0x%lx).\n",card+1,base); |
| return -EIO; |
| } |
| } |
| else { |
| portcount = inw(base+0x2); |
| if (!(inw(base+0xe) & 0x1) || ((portcount!=0) && (portcount!=4) && (portcount!=8))) { |
| #ifdef ISICOM_DEBUG |
| printk("\nbase+0x2=0x%x , base+0xe=0x%x",inw(base+0x2),inw(base+0xe)); |
| #endif |
| printk("\nISILoad:PCI Card%d reset failure (Possible bad I/O Port Address 0x%lx).\n",card+1,base); |
| return -EIO; |
| } |
| } |
| switch(signature) { |
| case 0xa5: |
| case 0xbb: |
| case 0xdd: |
| if (isi_card[card].isa) |
| isi_card[card].port_count = 8; |
| else { |
| if (portcount == 4) |
| isi_card[card].port_count = 4; |
| else |
| isi_card[card].port_count = 8; |
| } |
| isi_card[card].shift_count = 12; |
| break; |
| |
| case 0xcc: isi_card[card].port_count = 16; |
| isi_card[card].shift_count = 11; |
| break; |
| |
| default: printk("ISILoad:Card%d reset failure (Possible bad I/O Port Address 0x%lx).\n",card+1,base); |
| #ifdef ISICOM_DEBUG |
| printk("Sig=0x%x\n",signature); |
| #endif |
| return -EIO; |
| } |
| printk("-Done\n"); |
| return put_user(signature,(unsigned __user *)argp); |
| |
| case MIOCTL_LOAD_FIRMWARE: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (copy_from_user(&frame, argp, sizeof(bin_frame))) |
| return -EFAULT; |
| |
| if (WaitTillCardIsFree(base)) |
| return -EIO; |
| |
| outw(0xf0,base); /* start upload sequence */ |
| outw(0x00,base); |
| outw((frame.addr), base); /* lsb of adderess */ |
| |
| word_count=(frame.count >> 1) + frame.count % 2; |
| outw(word_count, base); |
| InterruptTheCard(base); |
| |
| for (i=0;i<=0x2f;i++); /* a wee bit of delay */ |
| |
| if (WaitTillCardIsFree(base)) |
| return -EIO; |
| |
| if ((status=inw(base+0x4))!=0) { |
| printk(KERN_WARNING "ISILoad:Card%d rejected load header:\nAddress:0x%x \nCount:0x%x \nStatus:0x%x \n", |
| card+1, frame.addr, frame.count, status); |
| return -EIO; |
| } |
| outsw(base, (void *) frame.bin_data, word_count); |
| |
| InterruptTheCard(base); |
| |
| for (i=0;i<=0x0f;i++); /* another wee bit of delay */ |
| |
| if (WaitTillCardIsFree(base)) |
| return -EIO; |
| |
| if ((status=inw(base+0x4))!=0) { |
| printk(KERN_ERR "ISILoad:Card%d got out of sync.Card Status:0x%x\n",card+1, status); |
| return -EIO; |
| } |
| return 0; |
| |
| case MIOCTL_READ_FIRMWARE: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (copy_from_user(&frame, argp, sizeof(bin_header))) |
| return -EFAULT; |
| |
| if (WaitTillCardIsFree(base)) |
| return -EIO; |
| |
| outw(0xf1,base); /* start download sequence */ |
| outw(0x00,base); |
| outw((frame.addr), base); /* lsb of adderess */ |
| |
| word_count=(frame.count >> 1) + frame.count % 2; |
| outw(word_count+1, base); |
| InterruptTheCard(base); |
| |
| for (i=0;i<=0xf;i++); /* a wee bit of delay */ |
| |
| if (WaitTillCardIsFree(base)) |
| return -EIO; |
| |
| if ((status=inw(base+0x4))!=0) { |
| printk(KERN_WARNING "ISILoad:Card%d rejected verify header:\nAddress:0x%x \nCount:0x%x \nStatus:0x%x \n", |
| card+1, frame.addr, frame.count, status); |
| return -EIO; |
| } |
| |
| inw(base); |
| insw(base, frame.bin_data, word_count); |
| InterruptTheCard(base); |
| |
| for (i=0;i<=0x0f;i++); /* another wee bit of delay */ |
| |
| if (WaitTillCardIsFree(base)) |
| return -EIO; |
| |
| if ((status=inw(base+0x4))!=0) { |
| printk(KERN_ERR "ISILoad:Card%d verify got out of sync.Card Status:0x%x\n",card+1, status); |
| return -EIO; |
| } |
| |
| if (copy_to_user(argp, &frame, sizeof(bin_frame))) |
| return -EFAULT; |
| return 0; |
| |
| case MIOCTL_XFER_CTRL: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| if (WaitTillCardIsFree(base)) |
| return -EIO; |
| |
| outw(0xf2, base); |
| outw(0x800, base); |
| outw(0x0, base); |
| outw(0x0, base); |
| InterruptTheCard(base); |
| outw(0x0, base+0x4); /* for ISI4608 cards */ |
| |
| isi_card[card].status |= FIRMWARE_LOADED; |
| return 0; |
| |
| default: |
| #ifdef ISICOM_DEBUG |
| printk(KERN_DEBUG "ISILoad: Received Ioctl cmd 0x%x.\n", cmd); |
| #endif |
| return -ENOIOCTLCMD; |
| } |
| } |
| |
| |
| /* |
| * ISICOM Driver specific routines ... |
| * |
| */ |
| |
| static inline int __isicom_paranoia_check(struct isi_port const *port, |
| char *name, const char *routine) |
| { |
| if (!port) { |
| printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for " |
| "dev %s in %s.\n", name, routine); |
| return 1; |
| } |
| if (port->magic != ISICOM_MAGIC) { |
| printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for " |
| "dev %s in %s.\n", name, routine); |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Transmitter. |
| * |
| * We shovel data into the card buffers on a regular basis. The card |
| * will do the rest of the work for us. |
| */ |
| |
| static void isicom_tx(unsigned long _data) |
| { |
| short count = (BOARD_COUNT-1), card, base; |
| short txcount, wrd, residue, word_count, cnt; |
| struct isi_port *port; |
| struct tty_struct *tty; |
| |
| /* find next active board */ |
| card = (prev_card + 1) & 0x0003; |
| while(count-- > 0) { |
| if (isi_card[card].status & BOARD_ACTIVE) |
| break; |
| card = (card + 1) & 0x0003; |
| } |
| if (!(isi_card[card].status & BOARD_ACTIVE)) |
| goto sched_again; |
| |
| prev_card = card; |
| |
| count = isi_card[card].port_count; |
| port = isi_card[card].ports; |
| base = isi_card[card].base; |
| for (;count > 0;count--, port++) { |
| if (!lock_card_at_interrupt(&isi_card[card])) |
| continue; |
| /* port not active or tx disabled to force flow control */ |
| if (!(port->flags & ASYNC_INITIALIZED) || |
| !(port->status & ISI_TXOK)) |
| unlock_card(&isi_card[card]); |
| continue; |
| |
| tty = port->tty; |
| |
| |
| if (tty == NULL) { |
| unlock_card(&isi_card[card]); |
| continue; |
| } |
| |
| txcount = min_t(short, TX_SIZE, port->xmit_cnt); |
| if (txcount <= 0 || tty->stopped || tty->hw_stopped) { |
| unlock_card(&isi_card[card]); |
| continue; |
| } |
| if (!(inw(base + 0x02) & (1 << port->channel))) { |
| unlock_card(&isi_card[card]); |
| continue; |
| } |
| pr_dbg("txing %d bytes, port%d.\n", txcount, |
| port->channel + 1); |
| outw((port->channel << isi_card[card].shift_count) | txcount, |
| base); |
| residue = NO; |
| wrd = 0; |
| while (1) { |
| cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE - port->xmit_tail)); |
| if (residue == YES) { |
| residue = NO; |
| if (cnt > 0) { |
| wrd |= (port->xmit_buf[port->xmit_tail] << 8); |
| port->xmit_tail = (port->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1); |
| port->xmit_cnt--; |
| txcount--; |
| cnt--; |
| outw(wrd, base); |
| } |
| else { |
| outw(wrd, base); |
| break; |
| } |
| } |
| if (cnt <= 0) break; |
| word_count = cnt >> 1; |
| outsw(base, port->xmit_buf+port->xmit_tail, word_count); |
| port->xmit_tail = (port->xmit_tail + (word_count << 1)) & |
| (SERIAL_XMIT_SIZE - 1); |
| txcount -= (word_count << 1); |
| port->xmit_cnt -= (word_count << 1); |
| if (cnt & 0x0001) { |
| residue = YES; |
| wrd = port->xmit_buf[port->xmit_tail]; |
| port->xmit_tail = (port->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1); |
| port->xmit_cnt--; |
| txcount--; |
| } |
| } |
| |
| InterruptTheCard(base); |
| if (port->xmit_cnt <= 0) |
| port->status &= ~ISI_TXOK; |
| if (port->xmit_cnt <= WAKEUP_CHARS) |
| schedule_work(&port->bh_tqueue); |
| unlock_card(&isi_card[card]); |
| } |
| |
| /* schedule another tx for hopefully in about 10ms */ |
| sched_again: |
| if (!re_schedule) { |
| re_schedule = 2; |
| return; |
| } |
| |
| init_timer(&tx); |
| tx.expires = jiffies + HZ/100; |
| tx.data = 0; |
| tx.function = isicom_tx; |
| add_timer(&tx); |
| |
| return; |
| } |
| |
| /* Interrupt handlers */ |
| |
| |
| static void isicom_bottomhalf(void *data) |
| { |
| struct isi_port *port = (struct isi_port *) data; |
| struct tty_struct *tty = port->tty; |
| |
| if (!tty) |
| return; |
| |
| tty_wakeup(tty); |
| wake_up_interruptible(&tty->write_wait); |
| } |
| |
| /* |
| * Main interrupt handler routine |
| */ |
| |
| static irqreturn_t isicom_interrupt(int irq, void *dev_id, struct pt_regs *regs) |
| { |
| struct isi_board *card = dev_id; |
| struct isi_port *port; |
| struct tty_struct *tty; |
| unsigned long base; |
| u16 header, word_count, count, channel; |
| short byte_count; |
| unsigned char *rp; |
| |
| if (!card || !(card->status & FIRMWARE_LOADED)) |
| return IRQ_NONE; |
| |
| base = card->base; |
| spin_lock(&card->card_lock); |
| |
| if (card->isa == NO) { |
| /* |
| * disable any interrupts from the PCI card and lower the |
| * interrupt line |
| */ |
| outw(0x8000, base+0x04); |
| ClearInterrupt(base); |
| } |
| |
| inw(base); /* get the dummy word out */ |
| header = inw(base); |
| channel = (header & 0x7800) >> card->shift_count; |
| byte_count = header & 0xff; |
| |
| if (channel + 1 > card->port_count) { |
| printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): %d(channel) > port_count.\n", |
| base, channel+1); |
| if (card->isa) |
| ClearInterrupt(base); |
| else |
| outw(0x0000, base+0x04); /* enable interrupts */ |
| spin_unlock(&card->card_lock); |
| return IRQ_HANDLED; |
| } |
| port = card->ports + channel; |
| if (!(port->flags & ASYNC_INITIALIZED)) { |
| if (card->isa) |
| ClearInterrupt(base); |
| else |
| outw(0x0000, base+0x04); /* enable interrupts */ |
| return IRQ_HANDLED; |
| } |
| |
| tty = port->tty; |
| if (tty == NULL) { |
| word_count = byte_count >> 1; |
| while(byte_count > 1) { |
| inw(base); |
| byte_count -= 2; |
| } |
| if (byte_count & 0x01) |
| inw(base); |
| if (card->isa == YES) |
| ClearInterrupt(base); |
| else |
| outw(0x0000, base+0x04); /* enable interrupts */ |
| spin_unlock(&card->card_lock); |
| return IRQ_HANDLED; |
| } |
| |
| if (header & 0x8000) { /* Status Packet */ |
| header = inw(base); |
| switch(header & 0xff) { |
| case 0: /* Change in EIA signals */ |
| |
| if (port->flags & ASYNC_CHECK_CD) { |
| if (port->status & ISI_DCD) { |
| if (!(header & ISI_DCD)) { |
| /* Carrier has been lost */ |
| pr_dbg("interrupt: DCD->low.\n"); |
| port->status &= ~ISI_DCD; |
| schedule_work(&port->hangup_tq); |
| } |
| } |
| else { |
| if (header & ISI_DCD) { |
| /* Carrier has been detected */ |
| pr_dbg("interrupt: DCD->high.\n"); |
| port->status |= ISI_DCD; |
| wake_up_interruptible(&port->open_wait); |
| } |
| } |
| } |
| else { |
| if (header & ISI_DCD) |
| port->status |= ISI_DCD; |
| else |
| port->status &= ~ISI_DCD; |
| } |
| |
| if (port->flags & ASYNC_CTS_FLOW) { |
| if (port->tty->hw_stopped) { |
| if (header & ISI_CTS) { |
| port->tty->hw_stopped = 0; |
| /* start tx ing */ |
| port->status |= (ISI_TXOK | ISI_CTS); |
| schedule_work(&port->bh_tqueue); |
| } |
| } |
| else { |
| if (!(header & ISI_CTS)) { |
| port->tty->hw_stopped = 1; |
| /* stop tx ing */ |
| port->status &= ~(ISI_TXOK | ISI_CTS); |
| } |
| } |
| } |
| else { |
| if (header & ISI_CTS) |
| port->status |= ISI_CTS; |
| else |
| port->status &= ~ISI_CTS; |
| } |
| |
| if (header & ISI_DSR) |
| port->status |= ISI_DSR; |
| else |
| port->status &= ~ISI_DSR; |
| |
| if (header & ISI_RI) |
| port->status |= ISI_RI; |
| else |
| port->status &= ~ISI_RI; |
| |
| break; |
| |
| case 1: /* Received Break !!! */ |
| tty_insert_flip_char(tty, 0, TTY_BREAK); |
| if (port->flags & ASYNC_SAK) |
| do_SAK(tty); |
| tty_flip_buffer_push(tty); |
| break; |
| |
| case 2: /* Statistics */ |
| pr_dbg("isicom_interrupt: stats!!!.\n"); |
| break; |
| |
| default: |
| pr_dbg("Intr: Unknown code in status packet.\n"); |
| break; |
| } |
| } |
| else { /* Data Packet */ |
| |
| count = tty_prepare_flip_string(tty, &rp, byte_count & ~1); |
| pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count); |
| word_count = count >> 1; |
| insw(base, rp, word_count); |
| byte_count -= (word_count << 1); |
| if (count & 0x0001) { |
| tty_insert_flip_char(tty, inw(base) & 0xff, TTY_NORMAL); |
| byte_count -= 2; |
| } |
| if (byte_count > 0) { |
| pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping " |
| "bytes...\n", base, channel + 1); |
| while(byte_count > 0) { /* drain out unread xtra data */ |
| inw(base); |
| byte_count -= 2; |
| } |
| } |
| tty_flip_buffer_push(tty); |
| } |
| if (card->isa == YES) |
| ClearInterrupt(base); |
| else |
| outw(0x0000, base+0x04); /* enable interrupts */ |
| return IRQ_HANDLED; |
| } |
| |
| static void isicom_config_port(struct isi_port *port) |
| { |
| struct isi_board *card = port->card; |
| struct tty_struct *tty; |
| unsigned long baud; |
| unsigned long base = card->base; |
| u16 channel_setup, channel = port->channel, |
| shift_count = card->shift_count; |
| unsigned char flow_ctrl; |
| |
| if (!(tty = port->tty) || !tty->termios) |
| return; |
| baud = C_BAUD(tty); |
| if (baud & CBAUDEX) { |
| baud &= ~CBAUDEX; |
| |
| /* if CBAUDEX bit is on and the baud is set to either 50 or 75 |
| * then the card is programmed for 57.6Kbps or 115Kbps |
| * respectively. |
| */ |
| |
| if (baud < 1 || baud > 2) |
| port->tty->termios->c_cflag &= ~CBAUDEX; |
| else |
| baud += 15; |
| } |
| if (baud == 15) { |
| |
| /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set |
| * by the set_serial_info ioctl ... this is done by |
| * the 'setserial' utility. |
| */ |
| |
| if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
| baud++; /* 57.6 Kbps */ |
| if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
| baud +=2; /* 115 Kbps */ |
| } |
| if (linuxb_to_isib[baud] == -1) { |
| /* hang up */ |
| drop_dtr(port); |
| return; |
| } |
| else |
| raise_dtr(port); |
| |
| if (lock_card(card)) { |
| outw(0x8000 | (channel << shift_count) |0x03, base); |
| outw(linuxb_to_isib[baud] << 8 | 0x03, base); |
| channel_setup = 0; |
| switch(C_CSIZE(tty)) { |
| case CS5: |
| channel_setup |= ISICOM_CS5; |
| break; |
| case CS6: |
| channel_setup |= ISICOM_CS6; |
| break; |
| case CS7: |
| channel_setup |= ISICOM_CS7; |
| break; |
| case CS8: |
| channel_setup |= ISICOM_CS8; |
| break; |
| } |
| |
| if (C_CSTOPB(tty)) |
| channel_setup |= ISICOM_2SB; |
| if (C_PARENB(tty)) { |
| channel_setup |= ISICOM_EVPAR; |
| if (C_PARODD(tty)) |
| channel_setup |= ISICOM_ODPAR; |
| } |
| outw(channel_setup, base); |
| InterruptTheCard(base); |
| unlock_card(card); |
| } |
| if (C_CLOCAL(tty)) |
| port->flags &= ~ASYNC_CHECK_CD; |
| else |
| port->flags |= ASYNC_CHECK_CD; |
| |
| /* flow control settings ...*/ |
| flow_ctrl = 0; |
| port->flags &= ~ASYNC_CTS_FLOW; |
| if (C_CRTSCTS(tty)) { |
| port->flags |= ASYNC_CTS_FLOW; |
| flow_ctrl |= ISICOM_CTSRTS; |
| } |
| if (I_IXON(tty)) |
| flow_ctrl |= ISICOM_RESPOND_XONXOFF; |
| if (I_IXOFF(tty)) |
| flow_ctrl |= ISICOM_INITIATE_XONXOFF; |
| |
| if (lock_card(card)) { |
| outw(0x8000 | (channel << shift_count) |0x04, base); |
| outw(flow_ctrl << 8 | 0x05, base); |
| outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base); |
| InterruptTheCard(base); |
| unlock_card(card); |
| } |
| |
| /* rx enabled -> enable port for rx on the card */ |
| if (C_CREAD(tty)) { |
| card->port_status |= (1 << channel); |
| outw(card->port_status, base + 0x02); |
| } |
| } |
| |
| /* open et all */ |
| |
| static inline void isicom_setup_board(struct isi_board *bp) |
| { |
| int channel; |
| struct isi_port *port; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&bp->card_lock, flags); |
| if (bp->status & BOARD_ACTIVE) { |
| spin_unlock_irqrestore(&bp->card_lock, flags); |
| return; |
| } |
| port = bp->ports; |
| bp->status |= BOARD_ACTIVE; |
| spin_unlock_irqrestore(&bp->card_lock, flags); |
| for (channel = 0; channel < bp->port_count; channel++, port++) |
| drop_dtr_rts(port); |
| return; |
| } |
| |
| static int isicom_setup_port(struct isi_port *port) |
| { |
| struct isi_board *card = port->card; |
| unsigned long flags; |
| |
| if (port->flags & ASYNC_INITIALIZED) { |
| return 0; |
| } |
| if (!port->xmit_buf) { |
| unsigned long page; |
| |
| if (!(page = get_zeroed_page(GFP_KERNEL))) |
| return -ENOMEM; |
| |
| if (port->xmit_buf) { |
| free_page(page); |
| return -ERESTARTSYS; |
| } |
| port->xmit_buf = (unsigned char *) page; |
| } |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| if (port->tty) |
| clear_bit(TTY_IO_ERROR, &port->tty->flags); |
| if (port->count == 1) |
| card->count++; |
| |
| port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
| |
| /* discard any residual data */ |
| kill_queue(port, ISICOM_KILLTX | ISICOM_KILLRX); |
| |
| isicom_config_port(port); |
| port->flags |= ASYNC_INITIALIZED; |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| |
| return 0; |
| } |
| |
| static int block_til_ready(struct tty_struct *tty, struct file *filp, struct isi_port *port) |
| { |
| struct isi_board *card = port->card; |
| int do_clocal = 0, retval; |
| unsigned long flags; |
| DECLARE_WAITQUEUE(wait, current); |
| |
| /* block if port is in the process of being closed */ |
| |
| if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { |
| pr_dbg("block_til_ready: close in progress.\n"); |
| interruptible_sleep_on(&port->close_wait); |
| if (port->flags & ASYNC_HUP_NOTIFY) |
| return -EAGAIN; |
| else |
| return -ERESTARTSYS; |
| } |
| |
| /* if non-blocking mode is set ... */ |
| |
| if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) { |
| pr_dbg("block_til_ready: non-block mode.\n"); |
| port->flags |= ASYNC_NORMAL_ACTIVE; |
| return 0; |
| } |
| |
| if (C_CLOCAL(tty)) |
| do_clocal = 1; |
| |
| /* block waiting for DCD to be asserted, and while |
| callout dev is busy */ |
| retval = 0; |
| add_wait_queue(&port->open_wait, &wait); |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| if (!tty_hung_up_p(filp)) |
| port->count--; |
| port->blocked_open++; |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| |
| while (1) { |
| raise_dtr_rts(port); |
| |
| set_current_state(TASK_INTERRUPTIBLE); |
| if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) { |
| if (port->flags & ASYNC_HUP_NOTIFY) |
| retval = -EAGAIN; |
| else |
| retval = -ERESTARTSYS; |
| break; |
| } |
| if (!(port->flags & ASYNC_CLOSING) && |
| (do_clocal || (port->status & ISI_DCD))) { |
| break; |
| } |
| if (signal_pending(current)) { |
| retval = -ERESTARTSYS; |
| break; |
| } |
| schedule(); |
| } |
| set_current_state(TASK_RUNNING); |
| remove_wait_queue(&port->open_wait, &wait); |
| spin_lock_irqsave(&card->card_lock, flags); |
| if (!tty_hung_up_p(filp)) |
| port->count++; |
| port->blocked_open--; |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| if (retval) |
| return retval; |
| port->flags |= ASYNC_NORMAL_ACTIVE; |
| return 0; |
| } |
| |
| static int isicom_open(struct tty_struct *tty, struct file *filp) |
| { |
| struct isi_port *port; |
| struct isi_board *card; |
| unsigned int line, board; |
| int error; |
| |
| line = tty->index; |
| if (line < 0 || line > PORT_COUNT-1) |
| return -ENODEV; |
| board = BOARD(line); |
| card = &isi_card[board]; |
| |
| if (!(card->status & FIRMWARE_LOADED)) |
| return -ENODEV; |
| |
| /* open on a port greater than the port count for the card !!! */ |
| if (line > ((board * 16) + card->port_count - 1)) |
| return -ENODEV; |
| |
| port = &isi_ports[line]; |
| if (isicom_paranoia_check(port, tty->name, "isicom_open")) |
| return -ENODEV; |
| |
| isicom_setup_board(card); |
| |
| port->count++; |
| tty->driver_data = port; |
| port->tty = tty; |
| if ((error = isicom_setup_port(port))!=0) |
| return error; |
| if ((error = block_til_ready(tty, filp, port))!=0) |
| return error; |
| |
| return 0; |
| } |
| |
| /* close et all */ |
| |
| static inline void isicom_shutdown_board(struct isi_board *bp) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&bp->card_lock, flags); |
| if (bp->status & BOARD_ACTIVE) { |
| bp->status &= ~BOARD_ACTIVE; |
| } |
| spin_unlock_irqrestore(&bp->card_lock, flags); |
| } |
| |
| static void isicom_shutdown_port(struct isi_port *port) |
| { |
| struct isi_board *card = port->card; |
| struct tty_struct *tty; |
| unsigned long flags; |
| |
| tty = port->tty; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| if (!(port->flags & ASYNC_INITIALIZED)) { |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| return; |
| } |
| if (port->xmit_buf) { |
| free_page((unsigned long) port->xmit_buf); |
| port->xmit_buf = NULL; |
| } |
| port->flags &= ~ASYNC_INITIALIZED; |
| /* 3rd October 2000 : Vinayak P Risbud */ |
| port->tty = NULL; |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| |
| /*Fix done by Anil .S on 30-04-2001 |
| remote login through isi port has dtr toggle problem |
| due to which the carrier drops before the password prompt |
| appears on the remote end. Now we drop the dtr only if the |
| HUPCL(Hangup on close) flag is set for the tty*/ |
| |
| if (C_HUPCL(tty)) |
| /* drop dtr on this port */ |
| drop_dtr(port); |
| |
| /* any other port uninits */ |
| if (tty) |
| set_bit(TTY_IO_ERROR, &tty->flags); |
| |
| if (--card->count < 0) { |
| pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n", |
| card->base, card->count); |
| card->count = 0; |
| } |
| |
| /* last port was closed , shutdown that boad too */ |
| if (C_HUPCL(tty)) { |
| if (!card->count) |
| isicom_shutdown_board(card); |
| } |
| } |
| |
| static void isicom_close(struct tty_struct *tty, struct file *filp) |
| { |
| struct isi_port *port = tty->driver_data; |
| struct isi_board *card = port->card; |
| unsigned long flags; |
| |
| if (!port) |
| return; |
| if (isicom_paranoia_check(port, tty->name, "isicom_close")) |
| return; |
| |
| pr_dbg("Close start!!!.\n"); |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| if (tty_hung_up_p(filp)) { |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| return; |
| } |
| |
| if (tty->count == 1 && port->count != 1) { |
| printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port count" |
| "tty->count = 1 port count = %d.\n", |
| card->base, port->count); |
| port->count = 1; |
| } |
| if (--port->count < 0) { |
| printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port count for" |
| "channel%d = %d", card->base, port->channel, |
| port->count); |
| port->count = 0; |
| } |
| |
| if (port->count) { |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| return; |
| } |
| port->flags |= ASYNC_CLOSING; |
| tty->closing = 1; |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| |
| if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
| tty_wait_until_sent(tty, port->closing_wait); |
| /* indicate to the card that no more data can be received |
| on this port */ |
| spin_lock_irqsave(&card->card_lock, flags); |
| if (port->flags & ASYNC_INITIALIZED) { |
| card->port_status &= ~(1 << port->channel); |
| outw(card->port_status, card->base + 0x02); |
| } |
| isicom_shutdown_port(port); |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| |
| if (tty->driver->flush_buffer) |
| tty->driver->flush_buffer(tty); |
| tty_ldisc_flush(tty); |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| tty->closing = 0; |
| |
| if (port->blocked_open) { |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| if (port->close_delay) { |
| pr_dbg("scheduling until time out.\n"); |
| msleep_interruptible(jiffies_to_msecs(port->close_delay)); |
| } |
| spin_lock_irqsave(&card->card_lock, flags); |
| wake_up_interruptible(&port->open_wait); |
| } |
| port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); |
| wake_up_interruptible(&port->close_wait); |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| |
| /* write et all */ |
| static int isicom_write(struct tty_struct *tty, const unsigned char *buf, |
| int count) |
| { |
| struct isi_port *port = tty->driver_data; |
| struct isi_board *card = port->card; |
| unsigned long flags; |
| int cnt, total = 0; |
| |
| if (isicom_paranoia_check(port, tty->name, "isicom_write")) |
| return 0; |
| |
| if (!tty || !port->xmit_buf) |
| return 0; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| |
| while(1) { |
| cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, |
| SERIAL_XMIT_SIZE - port->xmit_head)); |
| if (cnt <= 0) |
| break; |
| |
| memcpy(port->xmit_buf + port->xmit_head, buf, cnt); |
| port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE - 1); |
| port->xmit_cnt += cnt; |
| buf += cnt; |
| count -= cnt; |
| total += cnt; |
| } |
| if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped) |
| port->status |= ISI_TXOK; |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| return total; |
| } |
| |
| /* put_char et all */ |
| static void isicom_put_char(struct tty_struct *tty, unsigned char ch) |
| { |
| struct isi_port *port = tty->driver_data; |
| struct isi_board *card = port->card; |
| unsigned long flags; |
| |
| if (isicom_paranoia_check(port, tty->name, "isicom_put_char")) |
| return; |
| |
| if (!tty || !port->xmit_buf) |
| return; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) { |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| return; |
| } |
| |
| port->xmit_buf[port->xmit_head++] = ch; |
| port->xmit_head &= (SERIAL_XMIT_SIZE - 1); |
| port->xmit_cnt++; |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| |
| /* flush_chars et all */ |
| static void isicom_flush_chars(struct tty_struct *tty) |
| { |
| struct isi_port *port = tty->driver_data; |
| |
| if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars")) |
| return; |
| |
| if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || !port->xmit_buf) |
| return; |
| |
| /* this tells the transmitter to consider this port for |
| data output to the card ... that's the best we can do. */ |
| port->status |= ISI_TXOK; |
| } |
| |
| /* write_room et all */ |
| static int isicom_write_room(struct tty_struct *tty) |
| { |
| struct isi_port *port = tty->driver_data; |
| int free; |
| |
| if (isicom_paranoia_check(port, tty->name, "isicom_write_room")) |
| return 0; |
| |
| free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; |
| if (free < 0) |
| free = 0; |
| return free; |
| } |
| |
| /* chars_in_buffer et all */ |
| static int isicom_chars_in_buffer(struct tty_struct *tty) |
| { |
| struct isi_port *port = tty->driver_data; |
| if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer")) |
| return 0; |
| return port->xmit_cnt; |
| } |
| |
| /* ioctl et all */ |
| static inline void isicom_send_break(struct isi_port *port, unsigned long length) |
| { |
| struct isi_board *card = port->card; |
| unsigned long base = card->base; |
| |
| if (!lock_card(card)) |
| return; |
| |
| outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base); |
| outw((length & 0xff) << 8 | 0x00, base); |
| outw((length & 0xff00), base); |
| InterruptTheCard(base); |
| |
| unlock_card(card); |
| } |
| |
| static int isicom_tiocmget(struct tty_struct *tty, struct file *file) |
| { |
| struct isi_port *port = tty->driver_data; |
| /* just send the port status */ |
| u16 status = port->status; |
| |
| if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) |
| return -ENODEV; |
| |
| return ((status & ISI_RTS) ? TIOCM_RTS : 0) | |
| ((status & ISI_DTR) ? TIOCM_DTR : 0) | |
| ((status & ISI_DCD) ? TIOCM_CAR : 0) | |
| ((status & ISI_DSR) ? TIOCM_DSR : 0) | |
| ((status & ISI_CTS) ? TIOCM_CTS : 0) | |
| ((status & ISI_RI ) ? TIOCM_RI : 0); |
| } |
| |
| static int isicom_tiocmset(struct tty_struct *tty, struct file *file, |
| unsigned int set, unsigned int clear) |
| { |
| struct isi_port *port = tty->driver_data; |
| |
| if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) |
| return -ENODEV; |
| |
| if (set & TIOCM_RTS) |
| raise_rts(port); |
| if (set & TIOCM_DTR) |
| raise_dtr(port); |
| |
| if (clear & TIOCM_RTS) |
| drop_rts(port); |
| if (clear & TIOCM_DTR) |
| drop_dtr(port); |
| |
| return 0; |
| } |
| |
| static int isicom_set_serial_info(struct isi_port *port, |
| struct serial_struct __user *info) |
| { |
| struct serial_struct newinfo; |
| int reconfig_port; |
| |
| if (copy_from_user(&newinfo, info, sizeof(newinfo))) |
| return -EFAULT; |
| |
| reconfig_port = ((port->flags & ASYNC_SPD_MASK) != |
| (newinfo.flags & ASYNC_SPD_MASK)); |
| |
| if (!capable(CAP_SYS_ADMIN)) { |
| if ((newinfo.close_delay != port->close_delay) || |
| (newinfo.closing_wait != port->closing_wait) || |
| ((newinfo.flags & ~ASYNC_USR_MASK) != |
| (port->flags & ~ASYNC_USR_MASK))) |
| return -EPERM; |
| port->flags = ((port->flags & ~ ASYNC_USR_MASK) | |
| (newinfo.flags & ASYNC_USR_MASK)); |
| } |
| else { |
| port->close_delay = newinfo.close_delay; |
| port->closing_wait = newinfo.closing_wait; |
| port->flags = ((port->flags & ~ASYNC_FLAGS) | |
| (newinfo.flags & ASYNC_FLAGS)); |
| } |
| if (reconfig_port) { |
| isicom_config_port(port); |
| } |
| return 0; |
| } |
| |
| static int isicom_get_serial_info(struct isi_port *port, |
| struct serial_struct __user *info) |
| { |
| struct serial_struct out_info; |
| |
| memset(&out_info, 0, sizeof(out_info)); |
| /* out_info.type = ? */ |
| out_info.line = port - isi_ports; |
| out_info.port = port->card->base; |
| out_info.irq = port->card->irq; |
| out_info.flags = port->flags; |
| /* out_info.baud_base = ? */ |
| out_info.close_delay = port->close_delay; |
| out_info.closing_wait = port->closing_wait; |
| if (copy_to_user(info, &out_info, sizeof(out_info))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int isicom_ioctl(struct tty_struct *tty, struct file *filp, |
| unsigned int cmd, unsigned long arg) |
| { |
| struct isi_port *port = tty->driver_data; |
| void __user *argp = (void __user *)arg; |
| int retval; |
| |
| if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) |
| return -ENODEV; |
| |
| switch(cmd) { |
| case TCSBRK: |
| retval = tty_check_change(tty); |
| if (retval) |
| return retval; |
| tty_wait_until_sent(tty, 0); |
| if (!arg) |
| isicom_send_break(port, HZ/4); |
| return 0; |
| |
| case TCSBRKP: |
| retval = tty_check_change(tty); |
| if (retval) |
| return retval; |
| tty_wait_until_sent(tty, 0); |
| isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4); |
| return 0; |
| |
| case TIOCGSOFTCAR: |
| return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp); |
| |
| case TIOCSSOFTCAR: |
| if (get_user(arg, (unsigned long __user *) argp)) |
| return -EFAULT; |
| tty->termios->c_cflag = |
| ((tty->termios->c_cflag & ~CLOCAL) | |
| (arg ? CLOCAL : 0)); |
| return 0; |
| |
| case TIOCGSERIAL: |
| return isicom_get_serial_info(port, argp); |
| |
| case TIOCSSERIAL: |
| return isicom_set_serial_info(port, argp); |
| |
| default: |
| return -ENOIOCTLCMD; |
| } |
| return 0; |
| } |
| |
| /* set_termios et all */ |
| static void isicom_set_termios(struct tty_struct *tty, |
| struct termios *old_termios) |
| { |
| struct isi_port *port = tty->driver_data; |
| |
| if (isicom_paranoia_check(port, tty->name, "isicom_set_termios")) |
| return; |
| |
| if (tty->termios->c_cflag == old_termios->c_cflag && |
| tty->termios->c_iflag == old_termios->c_iflag) |
| return; |
| |
| isicom_config_port(port); |
| |
| if ((old_termios->c_cflag & CRTSCTS) && |
| !(tty->termios->c_cflag & CRTSCTS)) { |
| tty->hw_stopped = 0; |
| isicom_start(tty); |
| } |
| } |
| |
| /* throttle et all */ |
| static void isicom_throttle(struct tty_struct *tty) |
| { |
| struct isi_port *port = tty->driver_data; |
| struct isi_board *card = port->card; |
| |
| if (isicom_paranoia_check(port, tty->name, "isicom_throttle")) |
| return; |
| |
| /* tell the card that this port cannot handle any more data for now */ |
| card->port_status &= ~(1 << port->channel); |
| outw(card->port_status, card->base + 0x02); |
| } |
| |
| /* unthrottle et all */ |
| static void isicom_unthrottle(struct tty_struct *tty) |
| { |
| struct isi_port *port = tty->driver_data; |
| struct isi_board *card = port->card; |
| |
| if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle")) |
| return; |
| |
| /* tell the card that this port is ready to accept more data */ |
| card->port_status |= (1 << port->channel); |
| outw(card->port_status, card->base + 0x02); |
| } |
| |
| /* stop et all */ |
| static void isicom_stop(struct tty_struct *tty) |
| { |
| struct isi_port *port = tty->driver_data; |
| |
| if (isicom_paranoia_check(port, tty->name, "isicom_stop")) |
| return; |
| |
| /* this tells the transmitter not to consider this port for |
| data output to the card. */ |
| port->status &= ~ISI_TXOK; |
| } |
| |
| /* start et all */ |
| static void isicom_start(struct tty_struct *tty) |
| { |
| struct isi_port *port = tty->driver_data; |
| |
| if (isicom_paranoia_check(port, tty->name, "isicom_start")) |
| return; |
| |
| /* this tells the transmitter to consider this port for |
| data output to the card. */ |
| port->status |= ISI_TXOK; |
| } |
| |
| /* hangup et all */ |
| static void do_isicom_hangup(void *data) |
| { |
| struct isi_port *port = data; |
| struct tty_struct *tty; |
| |
| tty = port->tty; |
| if (tty) |
| tty_hangup(tty); |
| } |
| |
| static void isicom_hangup(struct tty_struct *tty) |
| { |
| struct isi_port *port = tty->driver_data; |
| |
| if (isicom_paranoia_check(port, tty->name, "isicom_hangup")) |
| return; |
| |
| isicom_shutdown_port(port); |
| port->count = 0; |
| port->flags &= ~ASYNC_NORMAL_ACTIVE; |
| port->tty = NULL; |
| wake_up_interruptible(&port->open_wait); |
| } |
| |
| /* flush_buffer et all */ |
| static void isicom_flush_buffer(struct tty_struct *tty) |
| { |
| struct isi_port *port = tty->driver_data; |
| struct isi_board *card = port->card; |
| unsigned long flags; |
| |
| if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer")) |
| return; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| |
| wake_up_interruptible(&tty->write_wait); |
| tty_wakeup(tty); |
| } |
| |
| /* |
| * Driver init and deinit functions |
| */ |
| |
| static int __devinit isicom_register_ioregion(struct pci_dev *pdev, |
| const unsigned int index) |
| { |
| struct isi_board *board = pci_get_drvdata(pdev); |
| |
| if (!board->base) |
| return -EINVAL; |
| |
| if (!request_region(board->base, 16, ISICOM_NAME)) { |
| dev_dbg(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d " |
| "will be disabled.\n", board->base, board->base + 15, |
| index + 1); |
| return -EBUSY; |
| } |
| |
| return 0; |
| } |
| |
| static void isicom_unregister_ioregion(struct pci_dev *pdev) |
| { |
| struct isi_board *board = pci_get_drvdata(pdev); |
| |
| if (!board->base) |
| return; |
| |
| release_region(board->base, 16); |
| dev_dbg(&pdev->dev, "I/O Region 0x%lx-0x%lx released.\n", |
| board->base, board->base + 15); |
| board->base = 0; |
| } |
| |
| static struct tty_operations isicom_ops = { |
| .open = isicom_open, |
| .close = isicom_close, |
| .write = isicom_write, |
| .put_char = isicom_put_char, |
| .flush_chars = isicom_flush_chars, |
| .write_room = isicom_write_room, |
| .chars_in_buffer = isicom_chars_in_buffer, |
| .ioctl = isicom_ioctl, |
| .set_termios = isicom_set_termios, |
| .throttle = isicom_throttle, |
| .unthrottle = isicom_unthrottle, |
| .stop = isicom_stop, |
| .start = isicom_start, |
| .hangup = isicom_hangup, |
| .flush_buffer = isicom_flush_buffer, |
| .tiocmget = isicom_tiocmget, |
| .tiocmset = isicom_tiocmset, |
| }; |
| |
| static int __devinit isicom_register_tty_driver(void) |
| { |
| int error = -ENOMEM; |
| |
| /* tty driver structure initialization */ |
| isicom_normal = alloc_tty_driver(PORT_COUNT); |
| if (!isicom_normal) |
| goto end; |
| |
| isicom_normal->owner = THIS_MODULE; |
| isicom_normal->name = "ttyM"; |
| isicom_normal->devfs_name = "isicom/"; |
| isicom_normal->major = ISICOM_NMAJOR; |
| isicom_normal->minor_start = 0; |
| isicom_normal->type = TTY_DRIVER_TYPE_SERIAL; |
| isicom_normal->subtype = SERIAL_TYPE_NORMAL; |
| isicom_normal->init_termios = tty_std_termios; |
| isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | |
| CLOCAL; |
| isicom_normal->flags = TTY_DRIVER_REAL_RAW; |
| tty_set_operations(isicom_normal, &isicom_ops); |
| |
| if ((error = tty_register_driver(isicom_normal))) { |
| pr_dbg("Couldn't register the dialin driver, error=%d\n", |
| error); |
| put_tty_driver(isicom_normal); |
| } |
| end: |
| return error; |
| } |
| |
| static void isicom_unregister_tty_driver(void) |
| { |
| int error; |
| |
| if ((error = tty_unregister_driver(isicom_normal))) |
| pr_dbg("couldn't unregister normal driver, error=%d.\n", error); |
| |
| put_tty_driver(isicom_normal); |
| } |
| |
| static int __devinit isicom_register_isr(struct pci_dev *pdev, |
| const unsigned int index) |
| { |
| struct isi_board *board = pci_get_drvdata(pdev); |
| unsigned long irqflags = SA_INTERRUPT; |
| int retval = -EINVAL; |
| |
| if (!board->base) |
| goto end; |
| |
| if (board->isa == NO) |
| irqflags |= SA_SHIRQ; |
| |
| retval = request_irq(board->irq, isicom_interrupt, irqflags, |
| ISICOM_NAME, board); |
| if (retval < 0) |
| dev_warn(&pdev->dev, "Could not install handler at Irq %d. " |
| "Card%d will be disabled.\n", board->irq, index + 1); |
| else |
| retval = 0; |
| end: |
| return retval; |
| } |
| |
| static int __devinit reset_card(struct pci_dev *pdev, |
| const unsigned int card, unsigned int *signature) |
| { |
| struct isi_board *board = pci_get_drvdata(pdev); |
| unsigned long base = board->base; |
| unsigned int portcount = 0; |
| int retval = 0; |
| |
| dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1, |
| base); |
| |
| inw(base + 0x8); |
| |
| mdelay(10); |
| |
| outw(0, base + 0x8); /* Reset */ |
| |
| msleep(3000); |
| |
| *signature = inw(base + 0x4) & 0xff; |
| |
| if (board->isa == YES) { |
| if (!(inw(base + 0xe) & 0x1) || (inw(base + 0x2))) { |
| dev_dbg(&pdev->dev, "base+0x2=0x%lx, base+0xe=0x%lx\n", |
| inw(base + 0x2), inw(base + 0xe)); |
| dev_err(&pdev->dev, "ISILoad:ISA Card%d reset failure " |
| "(Possible bad I/O Port Address 0x%lx).\n", |
| card + 1, base); |
| retval = -EIO; |
| goto end; |
| } |
| } else { |
| portcount = inw(base + 0x2); |
| if (!(inw(base + 0xe) & 0x1) || ((portcount != 0) && |
| (portcount != 4) && (portcount != 8))) { |
| dev_dbg(&pdev->dev, "base+0x2=0x%lx, base+0xe=0x%lx\n", |
| inw(base + 0x2), inw(base + 0xe)); |
| dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure " |
| "(Possible bad I/O Port Address 0x%lx).\n", |
| card + 1, base); |
| retval = -EIO; |
| goto end; |
| } |
| } |
| |
| switch (*signature) { |
| case 0xa5: |
| case 0xbb: |
| case 0xdd: |
| board->port_count = (board->isa == NO && portcount == 4) ? 4 : |
| 8; |
| board->shift_count = 12; |
| break; |
| case 0xcc: |
| board->port_count = 16; |
| board->shift_count = 11; |
| break; |
| default: |
| dev_warn(&pdev->dev, "ISILoad:Card%d reset failure (Possible " |
| "bad I/O Port Address 0x%lx).\n", card + 1, base); |
| dev_dbg(&pdev->dev, "Sig=0x%lx\n", signature); |
| retval = -EIO; |
| } |
| dev_info(&pdev->dev, "-Done\n"); |
| |
| end: |
| return retval; |
| } |
| |
| /* |
| * Insmod can set static symbols so keep these static |
| */ |
| static int io[4]; |
| static int irq[4]; |
| static int card; |
| |
| static int __devinit isicom_probe(struct pci_dev *pdev, |
| const struct pci_device_id *ent) |
| { |
| unsigned int ioaddr, signature, index; |
| int retval = -EPERM; |
| u8 pciirq; |
| struct isi_board *board = NULL; |
| |
| if (card >= BOARD_COUNT) |
| goto err; |
| |
| ioaddr = pci_resource_start(pdev, 3); |
| /* i.e at offset 0x1c in the PCI configuration register space. */ |
| pciirq = pdev->irq; |
| dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device); |
| |
| /* allot the first empty slot in the array */ |
| for (index = 0; index < BOARD_COUNT; index++) |
| if (isi_card[index].base == 0) { |
| board = &isi_card[index]; |
| break; |
| } |
| |
| board->base = ioaddr; |
| board->irq = pciirq; |
| board->isa = NO; |
| card++; |
| |
| pci_set_drvdata(pdev, board); |
| |
| retval = isicom_register_ioregion(pdev, index); |
| if (retval < 0) |
| goto err; |
| |
| retval = isicom_register_isr(pdev, index); |
| if (retval < 0) |
| goto errunrr; |
| |
| retval = reset_card(pdev, index, &signature); |
| if (retval < 0) |
| goto errunri; |
| |
| return 0; |
| |
| errunri: |
| free_irq(board->irq, board); |
| errunrr: |
| isicom_unregister_ioregion(pdev); |
| err: |
| board->base = 0; |
| return retval; |
| } |
| |
| static void __devexit isicom_remove(struct pci_dev *pdev) |
| { |
| struct isi_board *board = pci_get_drvdata(pdev); |
| |
| free_irq(board->irq, board); |
| isicom_unregister_ioregion(pdev); |
| } |
| |
| static int __devinit isicom_setup(void) |
| { |
| int retval, idx, channel; |
| struct isi_port *port; |
| |
| card = 0; |
| memset(isi_ports, 0, sizeof(isi_ports)); |
| |
| for(idx = 0; idx < BOARD_COUNT; idx++) { |
| port = &isi_ports[idx * 16]; |
| isi_card[idx].ports = port; |
| spin_lock_init(&isi_card[idx].card_lock); |
| for (channel = 0; channel < 16; channel++, port++) { |
| port->magic = ISICOM_MAGIC; |
| port->card = &isi_card[idx]; |
| port->channel = channel; |
| port->close_delay = 50 * HZ/100; |
| port->closing_wait = 3000 * HZ/100; |
| INIT_WORK(&port->hangup_tq, do_isicom_hangup, port); |
| INIT_WORK(&port->bh_tqueue, isicom_bottomhalf, port); |
| port->status = 0; |
| init_waitqueue_head(&port->open_wait); |
| init_waitqueue_head(&port->close_wait); |
| /* . . . */ |
| } |
| isi_card[idx].base = 0; |
| isi_card[idx].irq = 0; |
| |
| if (!io[idx]) |
| continue; |
| |
| if (irq[idx] == 2 || irq[idx] == 3 || irq[idx] == 4 || |
| irq[idx] == 5 || irq[idx] == 7 || |
| irq[idx] == 10 || irq[idx] == 11 || |
| irq[idx] == 12 || irq[idx] == 15) { |
| printk(KERN_ERR "ISICOM: ISA not supported yet.\n"); |
| retval = -EINVAL; |
| goto error; |
| } else |
| printk(KERN_ERR "ISICOM: Irq %d unsupported. " |
| "Disabling Card%d...\n", irq[idx], idx + 1); |
| } |
| |
| retval = isicom_register_tty_driver(); |
| if (retval < 0) |
| goto error; |
| |
| retval = pci_register_driver(&isicom_driver); |
| if (retval < 0) { |
| printk(KERN_ERR "ISICOM: Unable to register pci driver.\n"); |
| goto errtty; |
| } |
| |
| retval = misc_register(&isiloader_device); |
| if (retval < 0) |
| goto errpci; |
| |
| init_timer(&tx); |
| tx.expires = jiffies + 1; |
| tx.data = 0; |
| tx.function = isicom_tx; |
| re_schedule = 1; |
| add_timer(&tx); |
| |
| return 0; |
| errpci: |
| pci_unregister_driver(&isicom_driver); |
| errtty: |
| isicom_unregister_tty_driver(); |
| error: |
| return retval; |
| } |
| |
| static void __exit isicom_exit(void) |
| { |
| unsigned int index = 0; |
| |
| re_schedule = 0; |
| |
| while (re_schedule != 2 && index++ < 100) |
| msleep(10); |
| |
| pci_unregister_driver(&isicom_driver); |
| isicom_unregister_tty_driver(); |
| } |
| |
| module_init(isicom_setup); |
| module_exit(isicom_exit); |
| |
| MODULE_AUTHOR("MultiTech"); |
| MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech"); |
| MODULE_LICENSE("GPL"); |
| module_param_array(io, int, NULL, 0); |
| MODULE_PARM_DESC(io, "I/O ports for the cards"); |
| module_param_array(irq, int, NULL, 0); |
| MODULE_PARM_DESC(irq, "Interrupts for the cards"); |