diff options
Diffstat (limited to 'drivers/char/rio/rioparam.c')
| -rw-r--r-- | drivers/char/rio/rioparam.c | 663 |
1 files changed, 0 insertions, 663 deletions
diff --git a/drivers/char/rio/rioparam.c b/drivers/char/rio/rioparam.c deleted file mode 100644 index 6415f3f..0000000 --- a/drivers/char/rio/rioparam.c +++ /dev/null @@ -1,663 +0,0 @@ -/* -** ----------------------------------------------------------------------------- -** -** Perle Specialix driver for Linux -** Ported from existing RIO Driver for SCO sources. - * - * (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -** -** Module : rioparam.c -** SID : 1.3 -** Last Modified : 11/6/98 10:33:45 -** Retrieved : 11/6/98 10:33:50 -** -** ident @(#)rioparam.c 1.3 -** -** ----------------------------------------------------------------------------- -*/ - -#include <linux/module.h> -#include <linux/errno.h> -#include <linux/tty.h> -#include <asm/io.h> -#include <asm/system.h> -#include <asm/string.h> -#include <asm/uaccess.h> - -#include <linux/termios.h> -#include <linux/serial.h> - -#include <linux/generic_serial.h> - - -#include "linux_compat.h" -#include "rio_linux.h" -#include "pkt.h" -#include "daemon.h" -#include "rio.h" -#include "riospace.h" -#include "cmdpkt.h" -#include "map.h" -#include "rup.h" -#include "port.h" -#include "riodrvr.h" -#include "rioinfo.h" -#include "func.h" -#include "errors.h" -#include "pci.h" - -#include "parmmap.h" -#include "unixrup.h" -#include "board.h" -#include "host.h" -#include "phb.h" -#include "link.h" -#include "cmdblk.h" -#include "route.h" -#include "cirrus.h" -#include "rioioctl.h" -#include "param.h" - - - -/* -** The Scam, based on email from jeremyr@bugs.specialix.co.uk.... -** -** To send a command on a particular port, you put a packet with the -** command bit set onto the port. The command bit is in the len field, -** and gets ORed in with the actual byte count. -** -** When you send a packet with the command bit set the first -** data byte (data[0]) is interpreted as the command to execute. -** It also governs what data structure overlay should accompany the packet. -** Commands are defined in cirrus/cirrus.h -** -** If you want the command to pre-emt data already on the queue for the -** port, set the pre-emptive bit in conjunction with the command bit. -** It is not defined what will happen if you set the preemptive bit -** on a packet that is NOT a command. -** -** Pre-emptive commands should be queued at the head of the queue using -** add_start(), whereas normal commands and data are enqueued using -** add_end(). -** -** Most commands do not use the remaining bytes in the data array. The -** exceptions are OPEN MOPEN and CONFIG. (NB. As with the SI CONFIG and -** OPEN are currently analogous). With these three commands the following -** 11 data bytes are all used to pass config information such as baud rate etc. -** The fields are also defined in cirrus.h. Some contain straightforward -** information such as the transmit XON character. Two contain the transmit and -** receive baud rates respectively. For most baud rates there is a direct -** mapping between the rates defined in <sys/termio.h> and the byte in the -** packet. There are additional (non UNIX-standard) rates defined in -** /u/dos/rio/cirrus/h/brates.h. -** -** The rest of the data fields contain approximations to the Cirrus registers -** that are used to program number of bits etc. Each registers bit fields is -** defined in cirrus.h. -** -** NB. Only use those bits that are defined as being driver specific -** or common to the RTA and the driver. -** -** All commands going from RTA->Host will be dealt with by the Host code - you -** will never see them. As with the SI there will be three fields to look out -** for in each phb (not yet defined - needs defining a.s.a.p). -** -** modem_status - current state of handshake pins. -** -** port_status - current port status - equivalent to hi_stat for SI, indicates -** if port is IDLE_OPEN, IDLE_CLOSED etc. -** -** break_status - bit X set if break has been received. -** -** Happy hacking. -** -*/ - -/* -** RIOParam is used to open or configure a port. You pass it a PortP, -** which will have a tty struct attached to it. You also pass a command, -** either OPEN or CONFIG. The port's setup is taken from the t_ fields -** of the tty struct inside the PortP, and the port is either opened -** or re-configured. You must also tell RIOParam if the device is a modem -** device or not (i.e. top bit of minor number set or clear - take special -** care when deciding on this!). -** RIOParam neither flushes nor waits for drain, and is NOT preemptive. -** -** RIOParam assumes it will be called at splrio(), and also assumes -** that CookMode is set correctly in the port structure. -** -** NB. for MPX -** tty lock must NOT have been previously acquired. -*/ -int RIOParam(struct Port *PortP, int cmd, int Modem, int SleepFlag) -{ - struct tty_struct *TtyP; - int retval; - struct phb_param __iomem *phb_param_ptr; - struct PKT __iomem *PacketP; - int res; - u8 Cor1 = 0, Cor2 = 0, Cor4 = 0, Cor5 = 0; - u8 TxXon = 0, TxXoff = 0, RxXon = 0, RxXoff = 0; - u8 LNext = 0, TxBaud = 0, RxBaud = 0; - int retries = 0xff; - unsigned long flags; - - func_enter(); - - TtyP = PortP->gs.port.tty; - - rio_dprintk(RIO_DEBUG_PARAM, "RIOParam: Port:%d cmd:%d Modem:%d SleepFlag:%d Mapped: %d, tty=%p\n", PortP->PortNum, cmd, Modem, SleepFlag, PortP->Mapped, TtyP); - - if (!TtyP) { - rio_dprintk(RIO_DEBUG_PARAM, "Can't call rioparam with null tty.\n"); - - func_exit(); - - return RIO_FAIL; - } - rio_spin_lock_irqsave(&PortP->portSem, flags); - - if (cmd == RIOC_OPEN) { - /* - ** If the port is set to store or lock the parameters, and it is - ** paramed with OPEN, we want to restore the saved port termio, but - ** only if StoredTermio has been saved, i.e. NOT 1st open after reboot. - */ - } - - /* - ** wait for space - */ - while (!(res = can_add_transmit(&PacketP, PortP)) || (PortP->InUse != NOT_INUSE)) { - if (retries-- <= 0) { - break; - } - if (PortP->InUse != NOT_INUSE) { - rio_dprintk(RIO_DEBUG_PARAM, "Port IN_USE for pre-emptive command\n"); - } - - if (!res) { - rio_dprintk(RIO_DEBUG_PARAM, "Port has no space on transmit queue\n"); - } - - if (SleepFlag != OK_TO_SLEEP) { - rio_spin_unlock_irqrestore(&PortP->portSem, flags); - func_exit(); - - return RIO_FAIL; - } - - rio_dprintk(RIO_DEBUG_PARAM, "wait for can_add_transmit\n"); - rio_spin_unlock_irqrestore(&PortP->portSem, flags); - retval = RIODelay(PortP, HUNDRED_MS); - rio_spin_lock_irqsave(&PortP->portSem, flags); - if (retval == RIO_FAIL) { - rio_dprintk(RIO_DEBUG_PARAM, "wait for can_add_transmit broken by signal\n"); - rio_spin_unlock_irqrestore(&PortP->portSem, flags); - func_exit(); - return -EINTR; - } - if (PortP->State & RIO_DELETED) { - rio_spin_unlock_irqrestore(&PortP->portSem, flags); - func_exit(); - return 0; - } - } - - if (!res) { - rio_spin_unlock_irqrestore(&PortP->portSem, flags); - func_exit(); - - return RIO_FAIL; - } - - rio_dprintk(RIO_DEBUG_PARAM, "can_add_transmit() returns %x\n", res); - rio_dprintk(RIO_DEBUG_PARAM, "Packet is %p\n", PacketP); - - phb_param_ptr = (struct phb_param __iomem *) PacketP->data; - - - switch (TtyP->termios->c_cflag & CSIZE) { - case CS5: - { - rio_dprintk(RIO_DEBUG_PARAM, "5 bit data\n"); - Cor1 |= RIOC_COR1_5BITS; - break; - } - case CS6: - { - rio_dprintk(RIO_DEBUG_PARAM, "6 bit data\n"); - Cor1 |= RIOC_COR1_6BITS; - break; - } - case CS7: - { - rio_dprintk(RIO_DEBUG_PARAM, "7 bit data\n"); - Cor1 |= RIOC_COR1_7BITS; - break; - } - case CS8: - { - rio_dprintk(RIO_DEBUG_PARAM, "8 bit data\n"); - Cor1 |= RIOC_COR1_8BITS; - break; - } - } - - if (TtyP->termios->c_cflag & CSTOPB) { - rio_dprintk(RIO_DEBUG_PARAM, "2 stop bits\n"); - Cor1 |= RIOC_COR1_2STOP; - } else { - rio_dprintk(RIO_DEBUG_PARAM, "1 stop bit\n"); - Cor1 |= RIOC_COR1_1STOP; - } - - if (TtyP->termios->c_cflag & PARENB) { - rio_dprintk(RIO_DEBUG_PARAM, "Enable parity\n"); - Cor1 |= RIOC_COR1_NORMAL; - } else { - rio_dprintk(RIO_DEBUG_PARAM, "Disable parity\n"); - Cor1 |= RIOC_COR1_NOP; - } - if (TtyP->termios->c_cflag & PARODD) { - rio_dprintk(RIO_DEBUG_PARAM, "Odd parity\n"); - Cor1 |= RIOC_COR1_ODD; - } else { - rio_dprintk(RIO_DEBUG_PARAM, "Even parity\n"); - Cor1 |= RIOC_COR1_EVEN; - } - - /* - ** COR 2 - */ - if (TtyP->termios->c_iflag & IXON) { - rio_dprintk(RIO_DEBUG_PARAM, "Enable start/stop output control\n"); - Cor2 |= RIOC_COR2_IXON; - } else { - if (PortP->Config & RIO_IXON) { - rio_dprintk(RIO_DEBUG_PARAM, "Force enable start/stop output control\n"); - Cor2 |= RIOC_COR2_IXON; - } else - rio_dprintk(RIO_DEBUG_PARAM, "IXON has been disabled.\n"); - } - - if (TtyP->termios->c_iflag & IXANY) { - if (PortP->Config & RIO_IXANY) { - rio_dprintk(RIO_DEBUG_PARAM, "Enable any key to restart output\n"); - Cor2 |= RIOC_COR2_IXANY; - } else - rio_dprintk(RIO_DEBUG_PARAM, "IXANY has been disabled due to sanity reasons.\n"); - } - - if (TtyP->termios->c_iflag & IXOFF) { - rio_dprintk(RIO_DEBUG_PARAM, "Enable start/stop input control 2\n"); - Cor2 |= RIOC_COR2_IXOFF; - } - - if (TtyP->termios->c_cflag & HUPCL) { - rio_dprintk(RIO_DEBUG_PARAM, "Hangup on last close\n"); - Cor2 |= RIOC_COR2_HUPCL; - } - - if (C_CRTSCTS(TtyP)) { - rio_dprintk(RIO_DEBUG_PARAM, "Rx hardware flow control enabled\n"); - Cor2 |= RIOC_COR2_CTSFLOW; - Cor2 |= RIOC_COR2_RTSFLOW; - } else { - rio_dprintk(RIO_DEBUG_PARAM, "Rx hardware flow control disabled\n"); - Cor2 &= ~RIOC_COR2_CTSFLOW; - Cor2 &= ~RIOC_COR2_RTSFLOW; - } - - - if (TtyP->termios->c_cflag & CLOCAL) { - rio_dprintk(RIO_DEBUG_PARAM, "Local line\n"); - } else { - rio_dprintk(RIO_DEBUG_PARAM, "Possible Modem line\n"); - } - - /* - ** COR 4 (there is no COR 3) - */ - if (TtyP->termios->c_iflag & IGNBRK) { - rio_dprintk(RIO_DEBUG_PARAM, "Ignore break condition\n"); - Cor4 |= RIOC_COR4_IGNBRK; - } - if (!(TtyP->termios->c_iflag & BRKINT)) { - rio_dprintk(RIO_DEBUG_PARAM, "Break generates NULL condition\n"); - Cor4 |= RIOC_COR4_NBRKINT; - } else { - rio_dprintk(RIO_DEBUG_PARAM, "Interrupt on break condition\n"); - } - - if (TtyP->termios->c_iflag & INLCR) { - rio_dprintk(RIO_DEBUG_PARAM, "Map newline to carriage return on input\n"); - Cor4 |= RIOC_COR4_INLCR; - } - - if (TtyP->termios->c_iflag & IGNCR) { - rio_dprintk(RIO_DEBUG_PARAM, "Ignore carriage return on input\n"); - Cor4 |= RIOC_COR4_IGNCR; - } - - if (TtyP->termios->c_iflag & ICRNL) { - rio_dprintk(RIO_DEBUG_PARAM, "Map carriage return to newline on input\n"); - Cor4 |= RIOC_COR4_ICRNL; - } - if (TtyP->termios->c_iflag & IGNPAR) { - rio_dprintk(RIO_DEBUG_PARAM, "Ignore characters with parity errors\n"); - Cor4 |= RIOC_COR4_IGNPAR; - } - if (TtyP->termios->c_iflag & PARMRK) { - rio_dprintk(RIO_DEBUG_PARAM, "Mark parity errors\n"); - Cor4 |= RIOC_COR4_PARMRK; - } - - /* - ** Set the RAISEMOD flag to ensure that the modem lines are raised - ** on reception of a config packet. - ** The download code handles the zero baud condition. - */ - Cor4 |= RIOC_COR4_RAISEMOD; - - /* - ** COR 5 - */ - - Cor5 = RIOC_COR5_CMOE; - - /* - ** Set to monitor tbusy/tstop (or not). - */ - - if (PortP->MonitorTstate) - Cor5 |= RIOC_COR5_TSTATE_ON; - else - Cor5 |= RIOC_COR5_TSTATE_OFF; - - /* - ** Could set LNE here if you wanted LNext processing. SVR4 will use it. - */ - if (TtyP->termios->c_iflag & ISTRIP) { - rio_dprintk(RIO_DEBUG_PARAM, "Strip input characters\n"); - if (!(PortP->State & RIO_TRIAD_MODE)) { - Cor5 |= RIOC_COR5_ISTRIP; - } - } - - if (TtyP->termios->c_oflag & ONLCR) { - rio_dprintk(RIO_DEBUG_PARAM, "Map newline to carriage-return, newline on output\n"); - if (PortP->CookMode == COOK_MEDIUM) - Cor5 |= RIOC_COR5_ONLCR; - } - if (TtyP->termios->c_oflag & OCRNL) { - rio_dprintk(RIO_DEBUG_PARAM, "Map carriage return to newline on output\n"); - if (PortP->CookMode == COOK_MEDIUM) - Cor5 |= RIOC_COR5_OCRNL; - } - if ((TtyP->termios->c_oflag & TABDLY) == TAB3) { - rio_dprintk(RIO_DEBUG_PARAM, "Tab delay 3 set\n"); - if (PortP->CookMode == COOK_MEDIUM) - Cor5 |= RIOC_COR5_TAB3; - } - - /* - ** Flow control bytes. - */ - TxXon = TtyP->termios->c_cc[VSTART]; - TxXoff = TtyP->termios->c_cc[VSTOP]; - RxXon = TtyP->termios->c_cc[VSTART]; - RxXoff = TtyP->termios->c_cc[VSTOP]; - /* - ** LNEXT byte - */ - LNext = 0; - - /* - ** Baud rate bytes - */ - rio_dprintk(RIO_DEBUG_PARAM, "Mapping of rx/tx baud %x (%x)\n", TtyP->termios->c_cflag, CBAUD); - - switch (TtyP->termios->c_cflag & CBAUD) { -#define e(b) case B ## b : RxBaud = TxBaud = RIO_B ## b ;break - e(50); - e(75); - e(110); - e(134); - e(150); - e(200); - e(300); - e(600); - e(1200); - e(1800); - e(2400); - e(4800); - e(9600); - e(19200); - e(38400); - e(57600); - e(115200); /* e(230400);e(460800); e(921600); */ - } - - rio_dprintk(RIO_DEBUG_PARAM, "tx baud 0x%x, rx baud 0x%x\n", TxBaud, RxBaud); - - - /* - ** Leftovers - */ - if (TtyP->termios->c_cflag & CREAD) - rio_dprintk(RIO_DEBUG_PARAM, "Enable receiver\n"); -#ifdef RCV1EN - if (TtyP->termios->c_cflag & RCV1EN) - rio_dprintk(RIO_DEBUG_PARAM, "RCV1EN (?)\n"); -#endif -#ifdef XMT1EN - if (TtyP->termios->c_cflag & XMT1EN) - rio_dprintk(RIO_DEBUG_PARAM, "XMT1EN (?)\n"); -#endif - if (TtyP->termios->c_lflag & ISIG) - rio_dprintk(RIO_DEBUG_PARAM, "Input character signal generating enabled\n"); - if (TtyP->termios->c_lflag & ICANON) - rio_dprintk(RIO_DEBUG_PARAM, "Canonical input: erase and kill enabled\n"); - if (TtyP->termios->c_lflag & XCASE) - rio_dprintk(RIO_DEBUG_PARAM, "Canonical upper/lower presentation\n"); - if (TtyP->termios->c_lflag & ECHO) - rio_dprintk(RIO_DEBUG_PARAM, "Enable input echo\n"); - if (TtyP->termios->c_lflag & ECHOE) - rio_dprintk(RIO_DEBUG_PARAM, "Enable echo erase\n"); - if (TtyP->termios->c_lflag & ECHOK) - rio_dprintk(RIO_DEBUG_PARAM, "Enable echo kill\n"); - if (TtyP->termios->c_lflag & ECHONL) - rio_dprintk(RIO_DEBUG_PARAM, "Enable echo newline\n"); - if (TtyP->termios->c_lflag & NOFLSH) - rio_dprintk(RIO_DEBUG_PARAM, "Disable flush after interrupt or quit\n"); -#ifdef TOSTOP - if (TtyP->termios->c_lflag & TOSTOP) - rio_dprintk(RIO_DEBUG_PARAM, "Send SIGTTOU for background output\n"); -#endif -#ifdef XCLUDE - if (TtyP->termios->c_lflag & XCLUDE) - rio_dprintk(RIO_DEBUG_PARAM, "Exclusive use of this line\n"); -#endif - if (TtyP->termios->c_iflag & IUCLC) - rio_dprintk(RIO_DEBUG_PARAM, "Map uppercase to lowercase on input\n"); - if (TtyP->termios->c_oflag & OPOST) - rio_dprintk(RIO_DEBUG_PARAM, "Enable output post-processing\n"); - if (TtyP->termios->c_oflag & OLCUC) - rio_dprintk(RIO_DEBUG_PARAM, "Map lowercase to uppercase on output\n"); - if (TtyP->termios->c_oflag & ONOCR) - rio_dprintk(RIO_DEBUG_PARAM, "No carriage return output at column 0\n"); - if (TtyP->termios->c_oflag & ONLRET) - rio_dprintk(RIO_DEBUG_PARAM, "Newline performs carriage return function\n"); - if (TtyP->termios->c_oflag & OFILL) - rio_dprintk(RIO_DEBUG_PARAM, "Use fill characters for delay\n"); - if (TtyP->termios->c_oflag & OFDEL) - rio_dprintk(RIO_DEBUG_PARAM, "Fill character is DEL\n"); - if (TtyP->termios->c_oflag & NLDLY) - rio_dprintk(RIO_DEBUG_PARAM, "Newline delay set\n"); - if (TtyP->termios->c_oflag & CRDLY) - rio_dprintk(RIO_DEBUG_PARAM, "Carriage return delay set\n"); - if (TtyP->termios->c_oflag & TABDLY) - rio_dprintk(RIO_DEBUG_PARAM, "Tab delay set\n"); - /* - ** These things are kind of useful in a later life! - */ - PortP->Cor2Copy = Cor2; - - if (PortP->State & RIO_DELETED) { - rio_spin_unlock_irqrestore(&PortP->portSem, flags); - func_exit(); - - return RIO_FAIL; - } - - /* - ** Actually write the info into the packet to be sent - */ - writeb(cmd, &phb_param_ptr->Cmd); - writeb(Cor1, &phb_param_ptr->Cor1); - writeb(Cor2, &phb_param_ptr->Cor2); - writeb(Cor4, &phb_param_ptr->Cor4); - writeb(Cor5, &phb_param_ptr->Cor5); - writeb(TxXon, &phb_param_ptr->TxXon); - writeb(RxXon, &phb_param_ptr->RxXon); - writeb(TxXoff, &phb_param_ptr->TxXoff); - writeb(RxXoff, &phb_param_ptr->RxXoff); - writeb(LNext, &phb_param_ptr->LNext); - writeb(TxBaud, &phb_param_ptr->TxBaud); - writeb(RxBaud, &phb_param_ptr->RxBaud); - - /* - ** Set the length/command field - */ - writeb(12 | PKT_CMD_BIT, &PacketP->len); - - /* - ** The packet is formed - now, whack it off - ** to its final destination: - */ - add_transmit(PortP); - /* - ** Count characters transmitted for port statistics reporting - */ - if (PortP->statsGather) - PortP->txchars += 12; - - rio_spin_unlock_irqrestore(&PortP->portSem, flags); - - rio_dprintk(RIO_DEBUG_PARAM, "add_transmit returned.\n"); - /* - ** job done. - */ - func_exit(); - - return 0; -} - - -/* -** We can add another packet to a transmit queue if the packet pointer pointed -** to by the TxAdd pointer has PKT_IN_USE clear in its address. -*/ -int can_add_transmit(struct PKT __iomem **PktP, struct Port *PortP) -{ - struct PKT __iomem *tp; - - *PktP = tp = (struct PKT __iomem *) RIO_PTR(PortP->Caddr, readw(PortP->TxAdd)); - - return !((unsigned long) tp & PKT_IN_USE); -} - -/* -** To add a packet to the queue, you set the PKT_IN_USE bit in the address, -** and then move the TxAdd pointer along one position to point to the next -** packet pointer. You must wrap the pointer from the end back to the start. -*/ -void add_transmit(struct Port *PortP) -{ - if (readw(PortP->TxAdd) & PKT_IN_USE) { - rio_dprintk(RIO_DEBUG_PARAM, "add_transmit: Packet has been stolen!"); - } - writew(readw(PortP->TxAdd) | PKT_IN_USE, PortP->TxAdd); - PortP->TxAdd = (PortP->TxAdd == PortP->TxEnd) ? PortP->TxStart : PortP->TxAdd + 1; - writew(RIO_OFF(PortP->Caddr, PortP->TxAdd), &PortP->PhbP->tx_add); -} - -/**************************************** - * Put a packet onto the end of the - * free list - ****************************************/ -void put_free_end(struct Host *HostP, struct PKT __iomem *PktP) -{ - struct rio_free_list __iomem *tmp_pointer; - unsigned short old_end, new_end; - unsigned long flags; - - rio_spin_lock_irqsave(&HostP->HostLock, flags); - - /************************************************* - * Put a packet back onto the back of the free list - * - ************************************************/ - - rio_dprintk(RIO_DEBUG_PFE, "put_free_end(PktP=%p)\n", PktP); - - if ((old_end = readw(&HostP->ParmMapP->free_list_end)) != TPNULL) { - new_end = RIO_OFF(HostP->Caddr, PktP); - tmp_pointer = (struct rio_free_list __iomem *) RIO_PTR(HostP->Caddr, old_end); - writew(new_end, &tmp_pointer->next); - writew(old_end, &((struct rio_free_list __iomem *) PktP)->prev); - writew(TPNULL, &((struct rio_free_list __iomem *) PktP)->next); - writew(new_end, &HostP->ParmMapP->free_list_end); - } else { /* First packet on the free list this should never happen! */ - rio_dprintk(RIO_DEBUG_PFE, "put_free_end(): This should never happen\n"); - writew(RIO_OFF(HostP->Caddr, PktP), &HostP->ParmMapP->free_list_end); - tmp_pointer = (struct rio_free_list __iomem *) PktP; - writew(TPNULL, &tmp_pointer->prev); - writew(TPNULL, &tmp_pointer->next); - } - rio_dprintk(RIO_DEBUG_CMD, "Before unlock: %p\n", &HostP->HostLock); - rio_spin_unlock_irqrestore(&HostP->HostLock, flags); -} - -/* -** can_remove_receive(PktP,P) returns non-zero if PKT_IN_USE is set -** for the next packet on the queue. It will also set PktP to point to the -** relevant packet, [having cleared the PKT_IN_USE bit]. If PKT_IN_USE is clear, -** then can_remove_receive() returns 0. -*/ -int can_remove_receive(struct PKT __iomem **PktP, struct Port *PortP) -{ - if (readw(PortP->RxRemove) & PKT_IN_USE) { - *PktP = (struct PKT __iomem *) RIO_PTR(PortP->Caddr, readw(PortP->RxRemove) & ~PKT_IN_USE); - return 1; - } - return 0; -} - -/* -** To remove a packet from the receive queue you clear its PKT_IN_USE bit, -** and then bump the pointers. Once the pointers get to the end, they must -** be wrapped back to the start. -*/ -void remove_receive(struct Port *PortP) -{ - writew(readw(PortP->RxRemove) & ~PKT_IN_USE, PortP->RxRemove); - PortP->RxRemove = (PortP->RxRemove == PortP->RxEnd) ? PortP->RxStart : PortP->RxRemove + 1; - writew(RIO_OFF(PortP->Caddr, PortP->RxRemove), &PortP->PhbP->rx_remove); -} |
