| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jiri Slaby | 4706 | 59.49% | 32 | 32.99% |
| Alan Cox | 1467 | 18.55% | 26 | 26.80% |
| Linus Torvalds (pre-git) | 1397 | 17.66% | 5 | 5.15% |
| Al Viro | 90 | 1.14% | 4 | 4.12% |
| Joe Perches | 56 | 0.71% | 3 | 3.09% |
| Linus Torvalds | 44 | 0.56% | 3 | 3.09% |
| Peter Hurley | 33 | 0.42% | 4 | 4.12% |
| Ben Hutchings | 25 | 0.32% | 1 | 1.03% |
| Andrew Morton | 22 | 0.28% | 2 | 2.06% |
| Dan Carpenter | 20 | 0.25% | 1 | 1.03% |
| Mikael Pettersson | 16 | 0.20% | 1 | 1.03% |
| Kees Cook | 10 | 0.13% | 2 | 2.06% |
| Maximilian Attems | 5 | 0.06% | 2 | 2.06% |
| Huang Shijie | 4 | 0.05% | 1 | 1.03% |
| Dave Jones | 3 | 0.04% | 1 | 1.03% |
| Tejun Heo | 3 | 0.04% | 1 | 1.03% |
| Julia Lawall | 2 | 0.03% | 1 | 1.03% |
| Greg Kroah-Hartman | 2 | 0.03% | 2 | 2.06% |
| Adrian Bunk | 1 | 0.01% | 1 | 1.03% |
| Bill Pemberton | 1 | 0.01% | 1 | 1.03% |
| Jeff Dike | 1 | 0.01% | 1 | 1.03% |
| Arvind Yadav | 1 | 0.01% | 1 | 1.03% |
| Arnd Bergmann | 1 | 0.01% | 1 | 1.03% |
| Total | 7910 | 97 |
// SPDX-License-Identifier: GPL-2.0+ /* * Original driver code supplied by Multi-Tech * * Changes * 1/9/98 alan@lxorguk.ukuu.org.uk * 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@lxorguk.ukuu.org.uk * 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.d/) * * 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 */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/module.h> #include <linux/firmware.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/interrupt.h> #include <linux/timer.h> #include <linux/delay.h> #include <linux/ioport.h> #include <linux/slab.h> #include <linux/uaccess.h> #include <linux/io.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 isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c)) #else #define isicom_paranoia_check(a, b, c) 0 #endif static int isicom_probe(struct pci_dev *, const struct pci_device_id *); static void isicom_remove(struct pci_dev *); static const 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 = isicom_remove }; static int prev_card = 3; /* start servicing isi_card[0] */ static struct tty_driver *isicom_normal; static void isicom_tx(struct timer_list *unused); static void isicom_start(struct tty_struct *tty); static DEFINE_TIMER(tx, isicom_tx); /* 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, 20, 21 }; struct isi_board { unsigned long base; int irq; unsigned char port_count; unsigned short status; unsigned short port_status; /* each bit for each port */ unsigned short shift_count; struct isi_port *ports; signed char count; spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */ unsigned long flags; unsigned int index; }; struct isi_port { unsigned short magic; struct tty_port port; u16 channel; u16 status; struct isi_board *card; 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 WaitTillCardIsFree(unsigned long base) { unsigned int count = 0; while (!(inw(base + 0xe) & 0x1) && count++ < 100) mdelay(1); return !(inw(base + 0xe) & 0x1); } static int lock_card(struct isi_board *card) { unsigned long base = card->base; unsigned int retries, a; for (retries = 0; retries < 10; retries++) { spin_lock_irqsave(&card->card_lock, card->flags); for (a = 0; a < 10; a++) { if (inw(base + 0xe) & 0x1) return 1; udelay(10); } spin_unlock_irqrestore(&card->card_lock, card->flags); msleep(10); } pr_warn("Failed to lock Card (0x%lx)\n", card->base); return 0; /* Failed to acquire the card! */ } static void unlock_card(struct isi_board *card) { spin_unlock_irqrestore(&card->card_lock, card->flags); } /* * ISI Card specific ops ... */ /* card->lock HAS to be held */ static void raise_dtr(struct isi_port *port) { struct isi_board *card = port->card; unsigned long base = card->base; u16 channel = port->channel; if (WaitTillCardIsFree(base)) return; outw(0x8000 | (channel << card->shift_count) | 0x02, base); outw(0x0504, base); InterruptTheCard(base); port->status |= ISI_DTR; } /* card->lock HAS to be held */ static void drop_dtr(struct isi_port *port) { struct isi_board *card = port->card; unsigned long base = card->base; u16 channel = port->channel; if (WaitTillCardIsFree(base)) return; outw(0x8000 | (channel << card->shift_count) | 0x02, base); outw(0x0404, base); InterruptTheCard(base); port->status &= ~ISI_DTR; } /* card->lock HAS to be held */ 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 (WaitTillCardIsFree(base)) return; outw(0x8000 | (channel << card->shift_count) | 0x02, base); outw(0x0a04, base); InterruptTheCard(base); port->status |= ISI_RTS; } /* card->lock HAS to be held */ 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 (WaitTillCardIsFree(base)) return; outw(0x8000 | (channel << card->shift_count) | 0x02, base); outw(0x0804, base); InterruptTheCard(base); port->status &= ~ISI_RTS; } /* card->lock MUST NOT be held */ static void isicom_dtr_rts(struct tty_port *port, int on) { struct isi_port *ip = container_of(port, struct isi_port, port); struct isi_board *card = ip->card; unsigned long base = card->base; u16 channel = ip->channel; if (!lock_card(card)) return; if (on) { outw(0x8000 | (channel << card->shift_count) | 0x02, base); outw(0x0f04, base); InterruptTheCard(base); ip->status |= (ISI_DTR | ISI_RTS); } else { outw(0x8000 | (channel << card->shift_count) | 0x02, base); outw(0x0C04, base); InterruptTheCard(base); ip->status &= ~(ISI_DTR | ISI_RTS); } unlock_card(card); } /* card->lock HAS to be held */ 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 (WaitTillCardIsFree(base)) return; outw(0x8000 | (channel << card->shift_count) | 0x02, base); outw(0x0c04, base); InterruptTheCard(base); port->status &= ~(ISI_RTS | ISI_DTR); } /* * ISICOM Driver specific routines ... * */ static inline int __isicom_paranoia_check(struct isi_port const *port, char *name, const char *routine) { if (!port) { pr_warn("Warning: bad isicom magic for dev %s in %s\n", name, routine); return 1; } if (port->magic != ISICOM_MAGIC) { pr_warn("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(struct timer_list *unused) { unsigned long flags, base; unsigned int retries; short count = (BOARD_COUNT-1), card; 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; spin_lock_irqsave(&isi_card[card].card_lock, flags); for (retries = 0; retries < 100; retries++) { if (inw(base + 0xe) & 0x1) break; udelay(2); } if (retries >= 100) goto unlock; tty = tty_port_tty_get(&port->port); if (tty == NULL) goto put_unlock; for (; count > 0; count--, port++) { /* port not active or tx disabled to force flow control */ if (!tty_port_initialized(&port->port) || !(port->status & ISI_TXOK)) continue; txcount = min_t(short, TX_SIZE, port->xmit_cnt); if (txcount <= 0 || tty->stopped || tty->hw_stopped) continue; if (!(inw(base + 0x02) & (1 << port->channel))) continue; pr_debug("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->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->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->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) tty_wakeup(tty); } put_unlock: tty_kref_put(tty); unlock: spin_unlock_irqrestore(&isi_card[card].card_lock, flags); /* schedule another tx for hopefully in about 10ms */ sched_again: mod_timer(&tx, jiffies + msecs_to_jiffies(10)); } /* * Main interrupt handler routine */ static irqreturn_t isicom_interrupt(int irq, void *dev_id) { 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; /* did the card interrupt us? */ if (!(inw(base + 0x0e) & 0x02)) return IRQ_NONE; spin_lock(&card->card_lock); /* * 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) { pr_warn("%s(0x%lx): %d(channel) > port_count\n", __func__, base, channel + 1); outw(0x0000, base+0x04); /* enable interrupts */ spin_unlock(&card->card_lock); return IRQ_HANDLED; } port = card->ports + channel; if (!tty_port_initialized(&port->port)) { outw(0x0000, base+0x04); /* enable interrupts */ spin_unlock(&card->card_lock); return IRQ_HANDLED; } tty = tty_port_tty_get(&port->port); if (tty == NULL) { word_count = byte_count >> 1; while (byte_count > 1) { inw(base); byte_count -= 2; } if (byte_count & 0x01) inw(base); 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 (tty_port_check_carrier(&port->port)) { if (port->status & ISI_DCD) { if (!(header & ISI_DCD)) { /* Carrier has been lost */ pr_debug("%s: DCD->low.\n", __func__); port->status &= ~ISI_DCD; tty_hangup(tty); } } else if (header & ISI_DCD) { /* Carrier has been detected */ pr_debug("%s: DCD->high.\n", __func__); port->status |= ISI_DCD; wake_up_interruptible(&port->port.open_wait); } } else { if (header & ISI_DCD) port->status |= ISI_DCD; else port->status &= ~ISI_DCD; } if (tty_port_cts_enabled(&port->port)) { if (tty->hw_stopped) { if (header & ISI_CTS) { tty->hw_stopped = 0; /* start tx ing */ port->status |= (ISI_TXOK | ISI_CTS); tty_wakeup(tty); } } else if (!(header & ISI_CTS)) { 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(&port->port, 0, TTY_BREAK); if (port->port.flags & ASYNC_SAK) do_SAK(tty); tty_flip_buffer_push(&port->port); break; case 2: /* Statistics */ pr_debug("%s: stats!!!\n", __func__); break; default: pr_debug("%s: Unknown code in status packet.\n", __func__); break; } } else { /* Data Packet */ count = tty_prepare_flip_string(&port->port, &rp, byte_count & ~1); pr_debug("%s: Can rx %d of %d bytes.\n", __func__, count, byte_count); word_count = count >> 1; insw(base, rp, word_count); byte_count -= (word_count << 1); if (count & 0x0001) { tty_insert_flip_char(&port->port, inw(base) & 0xff, TTY_NORMAL); byte_count -= 2; } if (byte_count > 0) { pr_debug("%s(0x%lx:%d): Flip buffer overflow! dropping bytes...\n", __func__, base, channel + 1); /* drain out unread xtra data */ while (byte_count > 0) { inw(base); byte_count -= 2; } } tty_flip_buffer_push(&port->port); } outw(0x0000, base+0x04); /* enable interrupts */ spin_unlock(&card->card_lock); tty_kref_put(tty); return IRQ_HANDLED; } static void isicom_config_port(struct tty_struct *tty) { struct isi_port *port = tty->driver_data; struct isi_board *card = port->card; unsigned long baud; unsigned long base = card->base; u16 channel_setup, channel = port->channel, shift_count = card->shift_count; unsigned char flow_ctrl; /* FIXME: Switch to new tty baud API */ 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. */ /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */ if (baud < 1 || baud > 4) 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->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) baud++; /* 57.6 Kbps */ if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) baud += 2; /* 115 Kbps */ if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) baud += 3; /* 230 kbps*/ if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) baud += 4; /* 460 kbps*/ } if (linuxb_to_isib[baud] == -1) { /* hang up */ drop_dtr(port); return; } else raise_dtr(port); if (WaitTillCardIsFree(base) == 0) { 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); } tty_port_set_check_carrier(&port->port, !C_CLOCAL(tty)); /* flow control settings ...*/ flow_ctrl = 0; tty_port_set_cts_flow(&port->port, C_CRTSCTS(tty)); if (C_CRTSCTS(tty)) flow_ctrl |= ISICOM_CTSRTS; if (I_IXON(tty)) flow_ctrl |= ISICOM_RESPOND_XONXOFF; if (I_IXOFF(tty)) flow_ctrl |= ISICOM_INITIATE_XONXOFF; if (WaitTillCardIsFree(base) == 0) { outw(0x8000 | (channel << shift_count) | 0x04, base); outw(flow_ctrl << 8 | 0x05, base); outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base); InterruptTheCard(base); } /* 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; bp->count++; if (!(bp->status & BOARD_INIT)) { port = bp->ports; for (channel = 0; channel < bp->port_count; channel++, port++) drop_dtr_rts(port); } bp->status |= BOARD_ACTIVE | BOARD_INIT; } /* Activate and thus setup board are protected from races against shutdown by the tty_port mutex */ static int isicom_activate(struct tty_port *tport, struct tty_struct *tty) { struct isi_port *port = container_of(tport, struct isi_port, port); struct isi_board *card = port->card; unsigned long flags; if (tty_port_alloc_xmit_buf(tport) < 0) return -ENOMEM; spin_lock_irqsave(&card->card_lock, flags); isicom_setup_board(card); port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; /* discard any residual data */ if (WaitTillCardIsFree(card->base) == 0) { outw(0x8000 | (port->channel << card->shift_count) | 0x02, card->base); outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base); InterruptTheCard(card->base); } isicom_config_port(tty); spin_unlock_irqrestore(&card->card_lock, flags); return 0; } static int isicom_carrier_raised(struct tty_port *port) { struct isi_port *ip = container_of(port, struct isi_port, port); return (ip->status & ISI_DCD)?1 : 0; } static struct tty_port *isicom_find_port(struct tty_struct *tty) { struct isi_port *port; struct isi_board *card; unsigned int board; int line = tty->index; board = BOARD(line); card = &isi_card[board]; if (!(card->status & FIRMWARE_LOADED)) return NULL; /* open on a port greater than the port count for the card !!! */ if (line > ((board * 16) + card->port_count - 1)) return NULL; port = &isi_ports[line]; if (isicom_paranoia_check(port, tty->name, "isicom_open")) return NULL; return &port->port; } static int isicom_open(struct tty_struct *tty, struct file *filp) { struct isi_port *port; struct tty_port *tport; tport = isicom_find_port(tty); if (tport == NULL) return -ENODEV; port = container_of(tport, struct isi_port, port); tty->driver_data = port; return tty_port_open(tport, tty, filp); } /* close et all */ /* card->lock HAS to be held */ static void isicom_shutdown_port(struct isi_port *port) { struct isi_board *card = port->card; if (--card->count < 0) { pr_debug("%s: bad board(0x%lx) count %d.\n", __func__, card->base, card->count); card->count = 0; } /* last port was closed, shutdown that board too */ if (!card->count) card->status &= BOARD_ACTIVE; } 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); tty_wakeup(tty); } static void isicom_shutdown(struct tty_port *port) { struct isi_port *ip = container_of(port, struct isi_port, port); struct isi_board *card = ip->card; unsigned long flags; /* indicate to the card that no more data can be received on this port */ spin_lock_irqsave(&card->card_lock, flags); card->port_status &= ~(1 << ip->channel); outw(card->port_status, card->base + 0x02); isicom_shutdown_port(ip); spin_unlock_irqrestore(&card->card_lock, flags); tty_port_free_xmit_buf(port); } static void isicom_close(struct tty_struct *tty, struct file *filp) { struct isi_port *ip = tty->driver_data; struct tty_port *port; if (ip == NULL) return; port = &ip->port; if (isicom_paranoia_check(ip, tty->name, "isicom_close")) return; tty_port_close(port, tty, filp); } /* 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; 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->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 int 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 0; spin_lock_irqsave(&card->card_lock, flags); if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) { spin_unlock_irqrestore(&card->card_lock, flags); return 0; } port->port.xmit_buf[port->xmit_head++] = ch; port->xmit_head &= (SERIAL_XMIT_SIZE - 1); port->xmit_cnt++; spin_unlock_irqrestore(&card->card_lock, flags); return 1; } /* 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->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 int isicom_send_break(struct tty_struct *tty, int length) { struct isi_port *port = tty->driver_data; struct isi_board *card = port->card; unsigned long base = card->base; if (length == -1) return -EOPNOTSUPP; if (!lock_card(card)) return -EINVAL; outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base); outw((length & 0xff) << 8 | 0x00, base); outw((length & 0xff00u), base); InterruptTheCard(base); unlock_card(card); return 0; } static int isicom_tiocmget(struct tty_struct *tty) { 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, unsigned int set, unsigned int clear) { struct isi_port *port = tty->driver_data; unsigned long flags; if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) return -ENODEV; spin_lock_irqsave(&port->card->card_lock, flags); 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); spin_unlock_irqrestore(&port->card->card_lock, flags); return 0; } static int isicom_set_serial_info(struct tty_struct *tty, struct serial_struct *ss) { struct isi_port *port = tty->driver_data; int reconfig_port; if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) return -ENODEV; mutex_lock(&port->port.mutex); reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) != (ss->flags & ASYNC_SPD_MASK)); if (!capable(CAP_SYS_ADMIN)) { if ((ss->close_delay != port->port.close_delay) || (ss->closing_wait != port->port.closing_wait) || ((ss->flags & ~ASYNC_USR_MASK) != (port->port.flags & ~ASYNC_USR_MASK))) { mutex_unlock(&port->port.mutex); return -EPERM; } port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) | (ss->flags & ASYNC_USR_MASK)); } else { port->port.close_delay = ss->close_delay; port->port.closing_wait = ss->closing_wait; port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) | (ss->flags & ASYNC_FLAGS)); } if (reconfig_port) { unsigned long flags; spin_lock_irqsave(&port->card->card_lock, flags); isicom_config_port(tty); spin_unlock_irqrestore(&port->card->card_lock, flags); } mutex_unlock(&port->port.mutex); return 0; } static int isicom_get_serial_info(struct tty_struct *tty, struct serial_struct *ss) { struct isi_port *port = tty->driver_data; if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) return -ENODEV; mutex_lock(&port->port.mutex); /* ss->type = ? */ ss->line = port - isi_ports; ss->port = port->card->base; ss->irq = port->card->irq; ss->flags = port->port.flags; /* ss->baud_base = ? */ ss->close_delay = port->port.close_delay; ss->closing_wait = port->port.closing_wait; mutex_unlock(&port->port.mutex); return 0; } /* set_termios et all */ static void isicom_set_termios(struct tty_struct *tty, struct ktermios *old_termios) { struct isi_port *port = tty->driver_data; unsigned long flags; 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; spin_lock_irqsave(&port->card->card_lock, flags); isicom_config_port(tty); spin_unlock_irqrestore(&port->card->card_lock, flags); if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) { 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; } 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; tty_port_hangup(&port->port); } /* * Driver init and deinit functions */ static const 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, .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, .break_ctl = isicom_send_break, .get_serial = isicom_get_serial_info, .set_serial = isicom_set_serial_info, }; static const struct tty_port_operations isicom_port_ops = { .carrier_raised = isicom_carrier_raised, .dtr_rts = isicom_dtr_rts, .activate = isicom_activate, .shutdown = isicom_shutdown, }; static int 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 sig, portcount = 0; int retval = 0; dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1, base); inw(base + 0x8); msleep(10); outw(0, base + 0x8); /* Reset */ msleep(1000); sig = inw(base + 0x4) & 0xff; if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd && sig != 0xee) { dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible " "bad I/O Port Address 0x%lx).\n", card + 1, base); dev_dbg(&pdev->dev, "Sig=0x%x\n", sig); retval = -EIO; goto end; } msleep(10); portcount = inw(base + 0x2); if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 && portcount != 8 && portcount != 16)) { dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n", card + 1); retval = -EIO; goto end; } switch (sig) { case 0xa5: case 0xbb: case 0xdd: board->port_count = (portcount == 4) ? 4 : 8; board->shift_count = 12; break; case 0xcc: case 0xee: board->port_count = 16; board->shift_count = 11; break; } dev_info(&pdev->dev, "-Done\n"); *signature = sig; end: return retval; } static int load_firmware(struct pci_dev *pdev, const unsigned int index, const unsigned int signature) { struct isi_board *board = pci_get_drvdata(pdev); const struct firmware *fw; unsigned long base = board->base; unsigned int a; u16 word_count, status; int retval = -EIO; char *name; u8 *data; struct stframe { u16 addr; u16 count; u8 data[0]; } *frame; switch (signature) { case 0xa5: name = "isi608.bin"; break; case 0xbb: name = "isi608em.bin"; break; case 0xcc: name = "isi616em.bin"; break; case 0xdd: name = "isi4608.bin"; break; case 0xee: name = "isi4616.bin"; break; default: dev_err(&pdev->dev, "Unknown signature.\n"); goto end; } retval = request_firmware(&fw, name, &pdev->dev); if (retval) goto end; retval = -EIO; for (frame = (struct stframe *)fw->data; frame < (struct stframe *)(fw->data + fw->size); frame = (struct stframe *)((u8 *)(frame + 1) + frame->count)) { if (WaitTillCardIsFree(base)) goto errrelfw; outw(0xf0, base); /* start upload sequence */ outw(0x00, base); outw(frame->addr, base); /* lsb of address */ word_count = frame->count / 2 + frame->count % 2; outw(word_count, base); InterruptTheCard(base); udelay(100); /* 0x2f */ if (WaitTillCardIsFree(base)) goto errrelfw; status = inw(base + 0x4); if (status != 0) { dev_warn(&pdev->dev, "Card%d rejected load header:\n" "Address:0x%x\n" "Count:0x%x\n" "Status:0x%x\n", index + 1, frame->addr, frame->count, status); goto errrelfw; } outsw(base, frame->data, word_count); InterruptTheCard(base); udelay(50); /* 0x0f */ if (WaitTillCardIsFree(base)) goto errrelfw; status = inw(base + 0x4); if (status != 0) { dev_err(&pdev->dev, "Card%d got out of sync.Card " "Status:0x%x\n", index + 1, status); goto errrelfw; } } /* XXX: should we test it by reading it back and comparing with original like * in load firmware package? */ for (frame = (struct stframe *)fw->data; frame < (struct stframe *)(fw->data + fw->size); frame = (struct stframe *)((u8 *)(frame + 1) + frame->count)) { if (WaitTillCardIsFree(base)) goto errrelfw; outw(0xf1, base); /* start download sequence */ outw(0x00, base); outw(frame->addr, base); /* lsb of address */ word_count = (frame->count >> 1) + frame->count % 2; outw(word_count + 1, base); InterruptTheCard(base); udelay(50); /* 0xf */ if (WaitTillCardIsFree(base)) goto errrelfw; status = inw(base + 0x4); if (status != 0) { dev_warn(&pdev->dev, "Card%d rejected verify header:\n" "Address:0x%x\n" "Count:0x%x\n" "Status: 0x%x\n", index + 1, frame->addr, frame->count, status); goto errrelfw; } data = kmalloc_array(word_count, 2, GFP_KERNEL); if (data == NULL) { dev_err(&pdev->dev, "Card%d, firmware upload " "failed, not enough memory\n", index + 1); goto errrelfw; } inw(base); insw(base, data, word_count); InterruptTheCard(base); for (a = 0; a < frame->count; a++) if (data[a] != frame->data[a]) { kfree(data); dev_err(&pdev->dev, "Card%d, firmware upload " "failed\n", index + 1); goto errrelfw; } kfree(data); udelay(50); /* 0xf */ if (WaitTillCardIsFree(base)) goto errrelfw; status = inw(base + 0x4); if (status != 0) { dev_err(&pdev->dev, "Card%d verify got out of sync. " "Card Status:0x%x\n", index + 1, status); goto errrelfw; } } /* xfer ctrl */ if (WaitTillCardIsFree(base)) goto errrelfw; outw(0xf2, base); outw(0x800, base); outw(0x0, base); outw(0x0, base); InterruptTheCard(base); outw(0x0, base + 0x4); /* for ISI4608 cards */ board->status |= FIRMWARE_LOADED; retval = 0; errrelfw: release_firmware(fw); end: return retval; } /* * Insmod can set static symbols so keep these static */ static unsigned int card_count; static int isicom_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { unsigned int uninitialized_var(signature), index; int retval = -EPERM; struct isi_board *board = NULL; if (card_count >= BOARD_COUNT) goto err; retval = pci_enable_device(pdev); if (retval) { dev_err(&pdev->dev, "failed to enable\n"); goto err; } 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; } } if (index == BOARD_COUNT) { retval = -ENODEV; goto err_disable; } board->index = index; board->base = pci_resource_start(pdev, 3); board->irq = pdev->irq; card_count++; pci_set_drvdata(pdev, board); retval = pci_request_region(pdev, 3, ISICOM_NAME); if (retval) { dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d " "will be disabled.\n", board->base, board->base + 15, index + 1); retval = -EBUSY; goto errdec; } retval = request_irq(board->irq, isicom_interrupt, IRQF_SHARED, ISICOM_NAME, board); if (retval < 0) { dev_err(&pdev->dev, "Could not install handler at Irq %d. " "Card%d will be disabled.\n", board->irq, index + 1); goto errunrr; } retval = reset_card(pdev, index, &signature); if (retval < 0) goto errunri; retval = load_firmware(pdev, index, signature); if (retval < 0) goto errunri; for (index = 0; index < board->port_count; index++) { struct tty_port *tport = &board->ports[index].port; tty_port_init(tport); tport->ops = &isicom_port_ops; tport->close_delay = 50 * HZ/100; tport->closing_wait = 3000 * HZ/100; tty_port_register_device(tport, isicom_normal, board->index * 16 + index, &pdev->dev); } return 0; errunri: free_irq(board->irq, board); errunrr: pci_release_region(pdev, 3); errdec: board->base = 0; card_count--; err_disable: pci_disable_device(pdev); err: return retval; } static void isicom_remove(struct pci_dev *pdev) { struct isi_board *board = pci_get_drvdata(pdev); unsigned int i; for (i = 0; i < board->port_count; i++) { tty_unregister_device(isicom_normal, board->index * 16 + i); tty_port_destroy(&board->ports[i].port); } free_irq(board->irq, board); pci_release_region(pdev, 3); board->base = 0; card_count--; pci_disable_device(pdev); } static int __init isicom_init(void) { int retval, idx, channel; struct isi_port *port; 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->status = 0; /* . . . */ } isi_card[idx].base = 0; isi_card[idx].irq = 0; } /* tty driver structure initialization */ isicom_normal = alloc_tty_driver(PORT_COUNT); if (!isicom_normal) { retval = -ENOMEM; goto error; } isicom_normal->name = "ttyM"; 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_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK; tty_set_operations(isicom_normal, &isicom_ops); retval = tty_register_driver(isicom_normal); if (retval) { pr_debug("Couldn't register the dialin driver\n"); goto err_puttty; } retval = pci_register_driver(&isicom_driver); if (retval < 0) { pr_err("Unable to register pci driver.\n"); goto err_unrtty; } mod_timer(&tx, jiffies + 1); return 0; err_unrtty: tty_unregister_driver(isicom_normal); err_puttty: put_tty_driver(isicom_normal); error: return retval; } static void __exit isicom_exit(void) { del_timer_sync(&tx); pci_unregister_driver(&isicom_driver); tty_unregister_driver(isicom_normal); put_tty_driver(isicom_normal); } module_init(isicom_init); module_exit(isicom_exit); MODULE_AUTHOR("MultiTech"); MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech"); MODULE_LICENSE("GPL"); MODULE_FIRMWARE("isi608.bin"); MODULE_FIRMWARE("isi608em.bin"); MODULE_FIRMWARE("isi616em.bin"); MODULE_FIRMWARE("isi4608.bin"); MODULE_FIRMWARE("isi4616.bin");
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