/*- * Copyright (c) 1991 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ * from: @(#)com.c 7.5 (Berkeley) 5/16/91 * from: i386/isa sio.c,v 1.234 */ #include "opt_compat.h" #include "opt_gdb.h" #include "opt_kdb.h" #include "opt_sio.h" /* * Serial driver, based on 386BSD-0.1 com driver. * Mostly rewritten to use pseudo-DMA. * Works for National Semiconductor NS8250-NS16550AF UARTs. * COM driver, based on HP dca driver. * * Changes for PC Card integration: * - Added PC Card driver table and handlers */ /*=============================================================== * 386BSD(98),FreeBSD-1.1x(98) com driver. * ----- * modified for PC9801 by M.Ishii * Kyoto University Microcomputer Club (KMC) * Chou "TEFUTEFU" Hirotomi * Kyoto Univ. the faculty of medicine *=============================================================== * FreeBSD-2.0.1(98) sio driver. * ----- * modified for pc98 Internal i8251 and MICRO CORE MC16550II * T.Koike(hfc01340@niftyserve.or.jp) * implement kernel device configuration * aizu@orient.center.nitech.ac.jp * * Notes. * ----- * PC98 localization based on 386BSD(98) com driver. Using its PC98 local * functions. * This driver is under debugging,has bugs. */ /* * modified for AIWA B98-01 * by T.Hatanou last update: 15 Sep.1995 */ /* * Modified by Y.Takahashi of Kogakuin University. */ /* * modified for 8251(FIFO) by Seigo TANIMURA */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef PC98 #include #include #endif #ifdef COM_ESP #include #endif #include #ifdef PC98 #include #include #include #endif #define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ /* * Meaning of flags: * * 0x00000001 shared IRQs * 0x00000002 disable FIFO * 0x00000008 recover sooner from lost output interrupts * 0x00000010 device is potential system console * 0x00000020 device is forced to become system console * 0x00000040 device is reserved for low-level IO * 0x00000080 use this port for remote kernel debugging * 0x0000??00 minor number of master port * 0x00010000 PPS timestamping on CTS instead of DCD * 0x00080000 IIR_TXRDY bug * 0x00400000 If no comconsole found then mark as a comconsole * 0x1?000000 interface type */ #ifdef COM_MULTIPORT /* checks in flags for multiport and which is multiport "master chip" * for a given card */ #define COM_ISMULTIPORT(flags) ((flags) & 0x01) #define COM_MPMASTER(flags) (((flags) >> 8) & 0x0ff) #ifndef PC98 #define COM_NOTAST4(flags) ((flags) & 0x04) #endif #else #define COM_ISMULTIPORT(flags) (0) #endif /* COM_MULTIPORT */ #define COM_C_IIR_TXRDYBUG 0x80000 #define COM_CONSOLE(flags) ((flags) & 0x10) #define COM_DEBUGGER(flags) ((flags) & 0x80) #ifndef PC98 #define COM_FIFOSIZE(flags) (((flags) & 0xff000000) >> 24) #endif #define COM_FORCECONSOLE(flags) ((flags) & 0x20) #define COM_IIR_TXRDYBUG(flags) ((flags) & COM_C_IIR_TXRDYBUG) #define COM_LLCONSOLE(flags) ((flags) & 0x40) #define COM_LOSESOUTINTS(flags) ((flags) & 0x08) #define COM_NOFIFO(flags) ((flags) & 0x02) #ifndef PC98 #define COM_NOSCR(flags) ((flags) & 0x100000) #endif #define COM_PPSCTS(flags) ((flags) & 0x10000) #ifndef PC98 #define COM_ST16650A(flags) ((flags) & 0x20000) #define COM_TI16754(flags) ((flags) & 0x200000) #endif #define sio_getreg(com, off) \ (bus_space_read_1((com)->bst, (com)->bsh, (off))) #define sio_setreg(com, off, value) \ (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) /* * com state bits. * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher * than the other bits so that they can be tested as a group without masking * off the low bits. * * The following com and tty flags correspond closely: * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and * comstop()) * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) * TS_FLUSH is not used. * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). */ #define CS_BUSY 0x80 /* output in progress */ #define CS_TTGO 0x40 /* output not stopped by XOFF */ #define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ #define CS_CHECKMSR 1 /* check of MSR scheduled */ #define CS_CTS_OFLOW 2 /* use CTS output flow control */ #define CS_ODONE 4 /* output completed */ #define CS_RTS_IFLOW 8 /* use RTS input flow control */ #define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ static char const * const error_desc[] = { #define CE_OVERRUN 0 "silo overflow", #define CE_INTERRUPT_BUF_OVERFLOW 1 "interrupt-level buffer overflow", #define CE_TTY_BUF_OVERFLOW 2 "tty-level buffer overflow", }; #define CE_NTYPES 3 #define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum]) /* types. XXX - should be elsewhere */ typedef u_int Port_t; /* hardware port */ typedef u_char bool_t; /* boolean */ /* queue of linear buffers */ struct lbq { u_char *l_head; /* next char to process */ u_char *l_tail; /* one past the last char to process */ struct lbq *l_next; /* next in queue */ bool_t l_queued; /* nonzero if queued */ }; /* com device structure */ struct com_s { u_char state; /* miscellaneous flag bits */ u_char cfcr_image; /* copy of value written to CFCR */ #ifdef COM_ESP bool_t esp; /* is this unit a hayes esp board? */ #endif u_char extra_state; /* more flag bits, separate for order trick */ u_char fifo_image; /* copy of value written to FIFO */ bool_t hasfifo; /* nonzero for 16550 UARTs */ bool_t loses_outints; /* nonzero if device loses output interrupts */ u_char mcr_image; /* copy of value written to MCR */ #ifdef COM_MULTIPORT bool_t multiport; /* is this unit part of a multiport device? */ #endif /* COM_MULTIPORT */ bool_t no_irq; /* nonzero if irq is not attached */ bool_t gone; /* hardware disappeared */ bool_t poll; /* nonzero if polling is required */ bool_t poll_output; /* nonzero if polling for output is required */ bool_t st16650a; /* nonzero if Startech 16650A compatible */ int unit; /* unit number */ u_int flags; /* copy of device flags */ u_int tx_fifo_size; /* * The high level of the driver never reads status registers directly * because there would be too many side effects to handle conveniently. * Instead, it reads copies of the registers stored here by the * interrupt handler. */ u_char last_modem_status; /* last MSR read by intr handler */ u_char prev_modem_status; /* last MSR handled by high level */ u_char *ibuf; /* start of input buffer */ u_char *ibufend; /* end of input buffer */ u_char *ibufold; /* old input buffer, to be freed */ u_char *ihighwater; /* threshold in input buffer */ u_char *iptr; /* next free spot in input buffer */ int ibufsize; /* size of ibuf (not include error bytes) */ int ierroff; /* offset of error bytes in ibuf */ struct lbq obufq; /* head of queue of output buffers */ struct lbq obufs[2]; /* output buffers */ bus_space_tag_t bst; bus_space_handle_t bsh; #ifdef PC98 Port_t cmd_port; Port_t sts_port; Port_t in_modem_port; Port_t intr_ctrl_port; Port_t rsabase; /* Iobase address of an I/O-DATA RSA board. */ int intr_enable; int pc98_prev_modem_status; int pc98_modem_delta; int modem_car_chg_timer; int pc98_prev_siocmd; int pc98_prev_siomod; int modem_checking; int pc98_if_type; bool_t pc98_8251fifo; bool_t pc98_8251fifo_enable; #endif /* PC98 */ Port_t data_port; /* i/o ports */ #ifdef COM_ESP Port_t esp_port; #endif Port_t int_ctl_port; Port_t int_id_port; Port_t modem_ctl_port; Port_t line_status_port; Port_t modem_status_port; struct tty *tp; /* cross reference */ struct pps_state pps; int pps_bit; #ifdef KDB int alt_brk_state; #endif u_long bytes_in; /* statistics */ u_long bytes_out; u_int delta_error_counts[CE_NTYPES]; u_long error_counts[CE_NTYPES]; u_long rclk; struct resource *irqres; struct resource *ioportres; int ioportrid; void *cookie; /* * Data area for output buffers. Someday we should build the output * buffer queue without copying data. */ #ifdef PC98 int obufsize; u_char *obuf1; u_char *obuf2; #else u_char obuf1[256]; u_char obuf2[256]; #endif }; #ifdef COM_ESP static int espattach(struct com_s *com, Port_t esp_port); #endif static void combreak(struct tty *tp, int sig); static timeout_t siobusycheck; static u_int siodivisor(u_long rclk, speed_t speed); static void comclose(struct tty *tp); static int comopen(struct tty *tp, struct cdev *dev); static void sioinput(struct com_s *com); static void siointr1(struct com_s *com); static int siointr(void *arg); static int commodem(struct tty *tp, int sigon, int sigoff); static int comparam(struct tty *tp, struct termios *t); static void siopoll(void *); static void siosettimeout(void); static int siosetwater(struct com_s *com, speed_t speed); static void comstart(struct tty *tp); static void comstop(struct tty *tp, int rw); static timeout_t comwakeup; char sio_driver_name[] = "sio"; static struct mtx sio_lock; static int sio_inited; /* table and macro for fast conversion from a unit number to its com struct */ devclass_t sio_devclass; #define com_addr(unit) ((struct com_s *) \ devclass_get_softc(sio_devclass, unit)) /* XXX */ int comconsole = -1; static volatile speed_t comdefaultrate = CONSPEED; static u_long comdefaultrclk = DEFAULT_RCLK; SYSCTL_ULONG(_machdep, OID_AUTO, conrclk, CTLFLAG_RW, &comdefaultrclk, 0, ""); static speed_t gdbdefaultrate = GDBSPEED; SYSCTL_UINT(_machdep, OID_AUTO, gdbspeed, CTLFLAG_RW, &gdbdefaultrate, GDBSPEED, ""); static u_int com_events; /* input chars + weighted output completions */ static Port_t siocniobase; static int siocnunit = -1; static void *sio_slow_ih; static void *sio_fast_ih; static int sio_timeout; static int sio_timeouts_until_log; static struct callout_handle sio_timeout_handle = CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle); static int sio_numunits; #ifdef PC98 struct siodev { short if_type; short irq; Port_t cmd, sts, ctrl, mod; }; static int sysclock; #define COM_INT_DISABLE {int previpri; previpri=spltty(); #define COM_INT_ENABLE splx(previpri);} #define IEN_TxFLAG IEN_Tx #define COM_CARRIER_DETECT_EMULATE 0 #define PC98_CHECK_MODEM_INTERVAL (hz/10) #define DCD_OFF_TOLERANCE 2 #define DCD_ON_RECOGNITION 2 #define IS_8251(if_type) (!(if_type & 0x10)) #define COM1_EXT_CLOCK 0x40000 static void commint(struct cdev *dev); static void com_tiocm_bis(struct com_s *com, int msr); static void com_tiocm_bic(struct com_s *com, int msr); static int com_tiocm_get(struct com_s *com); static int com_tiocm_get_delta(struct com_s *com); static void pc98_msrint_start(struct cdev *dev); static void com_cflag_and_speed_set(struct com_s *com, int cflag, int speed); static int pc98_ttspeedtab(struct com_s *com, int speed, u_int *divisor); static int pc98_get_modem_status(struct com_s *com); static timeout_t pc98_check_msr; static void pc98_set_baud_rate(struct com_s *com, u_int count); static void pc98_i8251_reset(struct com_s *com, int mode, int command); static void pc98_disable_i8251_interrupt(struct com_s *com, int mod); static void pc98_enable_i8251_interrupt(struct com_s *com, int mod); static int pc98_check_i8251_interrupt(struct com_s *com); static int pc98_i8251_get_cmd(struct com_s *com); static int pc98_i8251_get_mod(struct com_s *com); static void pc98_i8251_set_cmd(struct com_s *com, int x); static void pc98_i8251_or_cmd(struct com_s *com, int x); static void pc98_i8251_clear_cmd(struct com_s *com, int x); static void pc98_i8251_clear_or_cmd(struct com_s *com, int clr, int x); static int pc98_check_if_type(device_t dev, struct siodev *iod); static int pc98_check_8251vfast(void); static int pc98_check_8251fifo(void); static void pc98_check_sysclock(void); static void pc98_set_ioport(struct com_s *com); #define com_int_Tx_disable(com) \ pc98_disable_i8251_interrupt(com,IEN_Tx|IEN_TxEMP) #define com_int_Tx_enable(com) \ pc98_enable_i8251_interrupt(com,IEN_TxFLAG) #define com_int_Rx_disable(com) \ pc98_disable_i8251_interrupt(com,IEN_Rx) #define com_int_Rx_enable(com) \ pc98_enable_i8251_interrupt(com,IEN_Rx) #define com_int_TxRx_disable(com) \ pc98_disable_i8251_interrupt(com,IEN_Tx|IEN_TxEMP|IEN_Rx) #define com_int_TxRx_enable(com) \ pc98_enable_i8251_interrupt(com,IEN_TxFLAG|IEN_Rx) #define com_send_break_on(com) \ (IS_8251((com)->pc98_if_type) ? \ pc98_i8251_or_cmd((com), CMD8251_SBRK) : \ sio_setreg((com), com_cfcr, (com)->cfcr_image |= CFCR_SBREAK)) #define com_send_break_off(com) \ (IS_8251((com)->pc98_if_type) ? \ pc98_i8251_clear_cmd((com), CMD8251_SBRK) : \ sio_setreg((com), com_cfcr, (com)->cfcr_image &= ~CFCR_SBREAK)) static struct speedtab pc98speedtab[] = { /* internal RS232C interface */ { 0, 0, }, { 50, 50, }, { 75, 75, }, { 150, 150, }, { 200, 200, }, { 300, 300, }, { 600, 600, }, { 1200, 1200, }, { 2400, 2400, }, { 4800, 4800, }, { 9600, 9600, }, { 19200, 19200, }, { 38400, 38400, }, { 51200, 51200, }, { 76800, 76800, }, { 20800, 20800, }, { 31200, 31200, }, { 41600, 41600, }, { 62400, 62400, }, { -1, -1 } }; static struct speedtab pc98fast_speedtab[] = { { 9600, 0x80 | (DEFAULT_RCLK / (16 * (9600))), }, { 19200, 0x80 | (DEFAULT_RCLK / (16 * (19200))), }, { 38400, 0x80 | (DEFAULT_RCLK / (16 * (38400))), }, { 57600, 0x80 | (DEFAULT_RCLK / (16 * (57600))), }, { 115200, 0x80 | (DEFAULT_RCLK / (16 * (115200))), }, { -1, -1 } }; static struct speedtab comspeedtab_pio9032b[] = { { 300, 6, }, { 600, 5, }, { 1200, 4, }, { 2400, 3, }, { 4800, 2, }, { 9600, 1, }, { 19200, 0, }, { 38400, 7, }, { -1, -1 } }; static struct speedtab comspeedtab_b98_01[] = { { 75, 11, }, { 150, 10, }, { 300, 9, }, { 600, 8, }, { 1200, 7, }, { 2400, 6, }, { 4800, 5, }, { 9600, 4, }, { 19200, 3, }, { 38400, 2, }, { 76800, 1, }, { 153600, 0, }, { -1, -1 } }; static struct speedtab comspeedtab_ind[] = { { 300, 1536, }, { 600, 768, }, { 1200, 384, }, { 2400, 192, }, { 4800, 96, }, { 9600, 48, }, { 19200, 24, }, { 38400, 12, }, { 57600, 8, }, { 115200, 4, }, { 153600, 3, }, { 230400, 2, }, { 460800, 1, }, { -1, -1 } }; struct { char *name; short port_table[7]; short irr_mask; struct speedtab *speedtab; short check_irq; } if_8251_type[] = { /* COM_IF_INTERNAL */ { " (internal)", {0x30, 0x32, 0x32, 0x33, 0x35, -1, -1}, -1, pc98speedtab, 1 }, /* COM_IF_PC9861K_1 */ { " (PC9861K)", {0xb1, 0xb3, 0xb3, 0xb0, 0xb0, -1, -1}, 3, NULL, 1 }, /* COM_IF_PC9861K_2 */ { " (PC9861K)", {0xb9, 0xbb, 0xbb, 0xb2, 0xb2, -1, -1}, 3, NULL, 1 }, /* COM_IF_IND_SS_1 */ { " (IND-SS)", {0xb1, 0xb3, 0xb3, 0xb0, 0xb0, 0xb3, -1}, 3, comspeedtab_ind, 1 }, /* COM_IF_IND_SS_2 */ { " (IND-SS)", {0xb9, 0xbb, 0xbb, 0xb2, 0xb2, 0xbb, -1}, 3, comspeedtab_ind, 1 }, /* COM_IF_PIO9032B_1 */ { " (PIO9032B)", {0xb1, 0xb3, 0xb3, 0xb0, 0xb0, 0xb8, -1}, 7, comspeedtab_pio9032b, 1 }, /* COM_IF_PIO9032B_2 */ { " (PIO9032B)", {0xb9, 0xbb, 0xbb, 0xb2, 0xb2, 0xba, -1}, 7, comspeedtab_pio9032b, 1 }, /* COM_IF_B98_01_1 */ { " (B98-01)", {0xb1, 0xb3, 0xb3, 0xb0, 0xb0, 0xd1, 0xd3}, 7, comspeedtab_b98_01, 0 }, /* COM_IF_B98_01_2 */ { " (B98-01)", {0xb9, 0xbb, 0xbb, 0xb2, 0xb2, 0xd5, 0xd7}, 7, comspeedtab_b98_01, 0 }, }; #define PC98SIO_data_port(type) (if_8251_type[type].port_table[0]) #define PC98SIO_cmd_port(type) (if_8251_type[type].port_table[1]) #define PC98SIO_sts_port(type) (if_8251_type[type].port_table[2]) #define PC98SIO_in_modem_port(type) (if_8251_type[type].port_table[3]) #define PC98SIO_intr_ctrl_port(type) (if_8251_type[type].port_table[4]) #define PC98SIO_baud_rate_port(type) (if_8251_type[type].port_table[5]) #define PC98SIO_func_port(type) (if_8251_type[type].port_table[6]) #define I8251F_data 0x130 #define I8251F_lsr 0x132 #define I8251F_msr 0x134 #define I8251F_iir 0x136 #define I8251F_fcr 0x138 #define I8251F_div 0x13a static bus_addr_t port_table_0[] = {0x000, 0x001, 0x002, 0x003, 0x004, 0x005, 0x006, 0x007}; static bus_addr_t port_table_1[] = {0x000, 0x002, 0x004, 0x006, 0x008, 0x00a, 0x00c, 0x00e}; static bus_addr_t port_table_8[] = {0x000, 0x100, 0x200, 0x300, 0x400, 0x500, 0x600, 0x700}; static bus_addr_t port_table_rsa[] = { 0x008, 0x009, 0x00a, 0x00b, 0x00c, 0x00d, 0x00e, 0x00f, 0x000, 0x001, 0x002, 0x003, 0x004, 0x005, 0x006, 0x007 }; struct { char *name; short irr_read; short irr_write; bus_addr_t *iat; bus_size_t iatsz; u_long rclk; } if_16550a_type[] = { /* COM_IF_RSA98 */ {" (RSA-98)", -1, -1, port_table_0, IO_COMSIZE, DEFAULT_RCLK}, /* COM_IF_NS16550 */ {"", -1, -1, port_table_0, IO_COMSIZE, DEFAULT_RCLK}, /* COM_IF_SECOND_CCU */ {"", -1, -1, port_table_0, IO_COMSIZE, DEFAULT_RCLK}, /* COM_IF_MC16550II */ {" (MC16550II)", -1, 0x1000, port_table_8, IO_COMSIZE, DEFAULT_RCLK * 4}, /* COM_IF_MCRS98 */ {" (MC-RS98)", -1, 0x1000, port_table_8, IO_COMSIZE, DEFAULT_RCLK * 4}, /* COM_IF_RSB3000 */ {" (RSB-3000)", 0xbf, -1, port_table_1, IO_COMSIZE, DEFAULT_RCLK * 10}, /* COM_IF_RSB384 */ {" (RSB-384)", 0xbf, -1, port_table_1, IO_COMSIZE, DEFAULT_RCLK * 10}, /* COM_IF_MODEM_CARD */ {"", -1, -1, port_table_0, IO_COMSIZE, DEFAULT_RCLK}, /* COM_IF_RSA98III */ {" (RSA-98III)", -1, -1, port_table_rsa, 16, DEFAULT_RCLK * 8}, /* COM_IF_ESP98 */ {" (ESP98)", -1, -1, port_table_1, IO_COMSIZE, DEFAULT_RCLK * 4}, }; #endif /* PC98 */ #ifdef GDB static Port_t siogdbiobase = 0; #endif #ifdef COM_ESP #ifdef PC98 /* XXX configure this properly. */ /* XXX quite broken for new-bus. */ static Port_t likely_com_ports[] = { 0, 0xb0, 0xb1, 0 }; static Port_t likely_esp_ports[] = { 0xc0d0, 0 }; #define ESP98_CMD1 (ESP_CMD1 * 0x100) #define ESP98_CMD2 (ESP_CMD2 * 0x100) #define ESP98_STATUS1 (ESP_STATUS1 * 0x100) #define ESP98_STATUS2 (ESP_STATUS2 * 0x100) #else /* PC98 */ /* XXX configure this properly. */ static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; static Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; #endif /* PC98 */ #endif /* * handle sysctl read/write requests for console speed * * In addition to setting comdefaultrate for I/O through /dev/console, * also set the initial and lock values for the /dev/ttyXX device * if there is one associated with the console. Finally, if the /dev/tty * device has already been open, change the speed on the open running port * itself. */ static int sysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) { int error, s; speed_t newspeed; struct com_s *com; struct tty *tp; newspeed = comdefaultrate; error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); if (error || !req->newptr) return (error); comdefaultrate = newspeed; if (comconsole < 0) /* serial console not selected? */ return (0); com = com_addr(comconsole); if (com == NULL) return (ENXIO); tp = com->tp; if (tp == NULL) return (ENXIO); /* * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX * (note, the lock rates really are boolean -- if non-zero, disallow * speed changes) */ tp->t_init_in.c_ispeed = tp->t_init_in.c_ospeed = tp->t_lock_in.c_ispeed = tp->t_lock_in.c_ospeed = tp->t_init_out.c_ispeed = tp->t_init_out.c_ospeed = tp->t_lock_out.c_ispeed = tp->t_lock_out.c_ospeed = comdefaultrate; if (tp->t_state & TS_ISOPEN) { tp->t_termios.c_ispeed = tp->t_termios.c_ospeed = comdefaultrate; s = spltty(); error = comparam(tp, &tp->t_termios); splx(s); } return error; } SYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 0, 0, sysctl_machdep_comdefaultrate, "I", ""); TUNABLE_INT("machdep.conspeed", __DEVOLATILE(int *, &comdefaultrate)); /* * Unload the driver and clear the table. * XXX this is mostly wrong. * XXX TODO: * This is usually called when the card is ejected, but * can be caused by a kldunload of a controller driver. * The idea is to reset the driver's view of the device * and ensure that any driver entry points such as * read and write do not hang. */ int siodetach(device_t dev) { struct com_s *com; com = (struct com_s *) device_get_softc(dev); if (com == NULL) { device_printf(dev, "NULL com in siounload\n"); return (0); } com->gone = TRUE; if (com->tp) ttyfree(com->tp); if (com->irqres) { bus_teardown_intr(dev, com->irqres, com->cookie); bus_release_resource(dev, SYS_RES_IRQ, 0, com->irqres); } if (com->ioportres) bus_release_resource(dev, SYS_RES_IOPORT, com->ioportrid, com->ioportres); if (com->ibuf != NULL) free(com->ibuf, M_DEVBUF); #ifdef PC98 if (com->obuf1 != NULL) free(com->obuf1, M_DEVBUF); #endif device_set_softc(dev, NULL); free(com, M_DEVBUF); return (0); } int sioprobe(dev, xrid, rclk, noprobe) device_t dev; int xrid; u_long rclk; int noprobe; { #if 0 static bool_t already_init; device_t xdev; #endif struct com_s *com; u_int divisor; bool_t failures[10]; int fn; device_t idev; Port_t iobase; intrmask_t irqmap[4]; intrmask_t irqs; u_char mcr_image; int result; u_long xirq; u_int flags = device_get_flags(dev); int rid; struct resource *port; #ifdef PC98 int tmp; struct siodev iod; #endif #ifdef PC98 iod.if_type = GET_IFTYPE(flags); if ((iod.if_type < 0 || iod.if_type > COM_IF_END1) && (iod.if_type < 0x10 || iod.if_type > COM_IF_END2)) return ENXIO; #endif rid = xrid; #ifdef PC98 if (IS_8251(iod.if_type)) { port = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE); } else if (iod.if_type == COM_IF_MODEM_CARD || iod.if_type == COM_IF_RSA98III || isa_get_vendorid(dev)) { port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, if_16550a_type[iod.if_type & 0x0f].iatsz, RF_ACTIVE); } else { port = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid, if_16550a_type[iod.if_type & 0x0f].iat, if_16550a_type[iod.if_type & 0x0f].iatsz, RF_ACTIVE); } #else port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, IO_COMSIZE, RF_ACTIVE); #endif if (!port) return (ENXIO); #ifdef PC98 if (!IS_8251(iod.if_type)) { if (isa_load_resourcev(port, if_16550a_type[iod.if_type & 0x0f].iat, if_16550a_type[iod.if_type & 0x0f].iatsz) != 0) { bus_release_resource(dev, SYS_RES_IOPORT, rid, port); return ENXIO; } } #endif com = malloc(sizeof(*com), M_DEVBUF, M_NOWAIT | M_ZERO); if (com == NULL) { bus_release_resource(dev, SYS_RES_IOPORT, rid, port); return (ENOMEM); } device_set_softc(dev, com); com->bst = rman_get_bustag(port); com->bsh = rman_get_bushandle(port); #ifdef PC98 if (!IS_8251(iod.if_type) && rclk == 0) rclk = if_16550a_type[iod.if_type & 0x0f].rclk; #else if (rclk == 0) rclk = DEFAULT_RCLK; #endif com->rclk = rclk; while (sio_inited != 2) if (atomic_cmpset_int(&sio_inited, 0, 1)) { mtx_init(&sio_lock, sio_driver_name, NULL, (comconsole != -1) ? MTX_SPIN | MTX_QUIET : MTX_SPIN); atomic_store_rel_int(&sio_inited, 2); } #if 0 /* * XXX this is broken - when we are first called, there are no * previously configured IO ports. We could hard code * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. * This code has been doing nothing since the conversion since * "count" is zero the first time around. */ if (!already_init) { /* * Turn off MCR_IENABLE for all likely serial ports. An unused * port with its MCR_IENABLE gate open will inhibit interrupts * from any used port that shares the interrupt vector. * XXX the gate enable is elsewhere for some multiports. */ device_t *devs; int count, i, xioport; #ifdef PC98 int xiftype; #endif devclass_get_devices(sio_devclass, &devs, &count); #ifdef PC98 for (i = 0; i < count; i++) { xdev = devs[i]; xioport = bus_get_resource_start(xdev, SYS_RES_IOPORT, 0); xiftype = GET_IFTYPE(device_get_flags(xdev)); if (device_is_enabled(xdev) && xioport > 0) { if (IS_8251(xiftype)) outb((xioport & 0xff00) | PC98SIO_cmd_port(xiftype & 0x0f), 0xf2); else outb(xioport + if_16550a_type[xiftype & 0x0f].iat[com_mcr], 0); } } #else for (i = 0; i < count; i++) { xdev = devs[i]; if (device_is_enabled(xdev) && bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, NULL) == 0) outb(xioport + com_mcr, 0); } #endif free(devs, M_TEMP); already_init = TRUE; } #endif if (COM_LLCONSOLE(flags)) { printf("sio%d: reserved for low-level i/o\n", device_get_unit(dev)); bus_release_resource(dev, SYS_RES_IOPORT, rid, port); device_set_softc(dev, NULL); free(com, M_DEVBUF); return (ENXIO); } #ifdef PC98 DELAY(10); /* * If the port is i8251 UART (internal, B98_01) */ if (pc98_check_if_type(dev, &iod) == -1) { bus_release_resource(dev, SYS_RES_IOPORT, rid, port); device_set_softc(dev, NULL); free(com, M_DEVBUF); return (ENXIO); } if (iod.irq > 0) bus_set_resource(dev, SYS_RES_IRQ, 0, iod.irq, 1); if (IS_8251(iod.if_type)) { outb(iod.cmd, 0); DELAY(10); outb(iod.cmd, 0); DELAY(10); outb(iod.cmd, 0); DELAY(10); outb(iod.cmd, CMD8251_RESET); DELAY(1000); /* for a while...*/ outb(iod.cmd, 0xf2); /* MODE (dummy) */ DELAY(10); outb(iod.cmd, 0x01); /* CMD (dummy) */ DELAY(1000); /* for a while...*/ if (( inb(iod.sts) & STS8251_TxEMP ) == 0 ) { result = (ENXIO); } if (if_8251_type[iod.if_type & 0x0f].check_irq) { COM_INT_DISABLE tmp = ( inb( iod.ctrl ) & ~(IEN_Rx|IEN_TxEMP|IEN_Tx)); outb( iod.ctrl, tmp|IEN_TxEMP ); DELAY(10); result = isa_irq_pending() ? 0 : ENXIO; outb( iod.ctrl, tmp ); COM_INT_ENABLE } else { /* * B98_01 doesn't activate TxEMP interrupt line * when being reset, so we can't check irq pending. */ result = 0; } bus_release_resource(dev, SYS_RES_IOPORT, rid, port); if (result) { device_set_softc(dev, NULL); free(com, M_DEVBUF); } return result; } #endif /* PC98 */ /* * If the device is on a multiport card and has an AST/4 * compatible interrupt control register, initialize this * register and prepare to leave MCR_IENABLE clear in the mcr. * Otherwise, prepare to set MCR_IENABLE in the mcr. * Point idev to the device struct giving the correct id_irq. * This is the struct for the master device if there is one. */ idev = dev; mcr_image = MCR_IENABLE; #ifdef COM_MULTIPORT if (COM_ISMULTIPORT(flags)) { #ifndef PC98 Port_t xiobase; u_long io; #endif idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); if (idev == NULL) { printf("sio%d: master device %d not configured\n", device_get_unit(dev), COM_MPMASTER(flags)); idev = dev; } #ifndef PC98 if (!COM_NOTAST4(flags)) { if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, NULL) == 0) { xiobase = io; if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) == 0) outb(xiobase + com_scr, 0x80); else outb(xiobase + com_scr, 0); } mcr_image = 0; } #endif } #endif /* COM_MULTIPORT */ if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) mcr_image = 0; bzero(failures, sizeof failures); iobase = rman_get_start(port); #ifdef PC98 if (iod.if_type == COM_IF_RSA98III) { mcr_image = 0; outb(iobase + rsa_msr, 0x04); outb(iobase + rsa_frr, 0x00); if ((inb(iobase + rsa_srr) & 0x36) != 0x36) { bus_release_resource(dev, SYS_RES_IOPORT, rid, port); device_set_softc(dev, NULL); free(com, M_DEVBUF); return (ENXIO); } outb(iobase + rsa_ier, 0x00); outb(iobase + rsa_frr, 0x00); outb(iobase + rsa_tivsr, 0x00); outb(iobase + rsa_tcr, 0x00); } tmp = if_16550a_type[iod.if_type & 0x0f].irr_write; if (tmp != -1) { /* MC16550II */ int irqout; switch (isa_get_irq(idev)) { case 3: irqout = 4; break; case 5: irqout = 5; break; case 6: irqout = 6; break; case 12: irqout = 7; break; default: printf("sio%d: irq configuration error\n", device_get_unit(dev)); bus_release_resource(dev, SYS_RES_IOPORT, rid, port); device_set_softc(dev, NULL); free(com, M_DEVBUF); return (ENXIO); } outb((iobase & 0x00ff) | tmp, irqout); } #endif /* * We don't want to get actual interrupts, just masked ones. * Interrupts from this line should already be masked in the ICU, * but mask them in the processor as well in case there are some * (misconfigured) shared interrupts. */ mtx_lock_spin(&sio_lock); /* EXTRA DELAY? */ /* * Initialize the speed and the word size and wait long enough to * drain the maximum of 16 bytes of junk in device output queues. * The speed is undefined after a master reset and must be set * before relying on anything related to output. There may be * junk after a (very fast) soft reboot and (apparently) after * master reset. * XXX what about the UART bug avoided by waiting in comparam()? * We don't want to to wait long enough to drain at 2 bps. */ if (iobase == siocniobase) DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); else { sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); divisor = siodivisor(rclk, SIO_TEST_SPEED); sio_setreg(com, com_dlbl, divisor & 0xff); sio_setreg(com, com_dlbh, divisor >> 8); sio_setreg(com, com_cfcr, CFCR_8BITS); DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); } /* * Enable the interrupt gate and disable device interrupts. This * should leave the device driving the interrupt line low and * guarantee an edge trigger if an interrupt can be generated. */ /* EXTRA DELAY? */ sio_setreg(com, com_mcr, mcr_image); sio_setreg(com, com_ier, 0); DELAY(1000); /* XXX */ irqmap[0] = isa_irq_pending(); /* * Attempt to set loopback mode so that we can send a null byte * without annoying any external device. */ /* EXTRA DELAY? */ sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); /* * Attempt to generate an output interrupt. On 8250's, setting * IER_ETXRDY generates an interrupt independent of the current * setting and independent of whether the THR is empty. On 16450's, * setting IER_ETXRDY generates an interrupt independent of the * current setting. On 16550A's, setting IER_ETXRDY only * generates an interrupt when IER_ETXRDY is not already set. */ sio_setreg(com, com_ier, IER_ETXRDY); #ifdef PC98 if (iod.if_type == COM_IF_RSA98III) outb(iobase + rsa_ier, 0x04); #endif /* * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate * an interrupt. They'd better generate one for actually doing * output. Loopback may be broken on the same incompatibles but * it's unlikely to do more than allow the null byte out. */ sio_setreg(com, com_data, 0); if (iobase == siocniobase) DELAY((1 + 2) * 1000000 / (comdefaultrate / 10)); else DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); /* * Turn off loopback mode so that the interrupt gate works again * (MCR_IENABLE was hidden). This should leave the device driving * an interrupt line high. It doesn't matter if the interrupt * line oscillates while we are not looking at it, since interrupts * are disabled. */ /* EXTRA DELAY? */ sio_setreg(com, com_mcr, mcr_image); /* * It seems my Xircom CBEM56G Cardbus modem wants to be reset * to 8 bits *again*, or else probe test 0 will fail. * gwk@sgi.com, 4/19/2001 */ sio_setreg(com, com_cfcr, CFCR_8BITS); /* * Some PCMCIA cards (Palido 321s, DC-1S, ...) have the "TXRDY bug", * so we probe for a buggy IIR_TXRDY implementation even in the * noprobe case. We don't probe for it in the !noprobe case because * noprobe is always set for PCMCIA cards and the problem is not * known to affect any other cards. */ if (noprobe) { /* Read IIR a few times. */ for (fn = 0; fn < 2; fn ++) { DELAY(10000); failures[6] = sio_getreg(com, com_iir); } /* IIR_TXRDY should be clear. Is it? */ result = 0; if (failures[6] & IIR_TXRDY) { /* * No. We seem to have the bug. Does our fix for * it work? */ sio_setreg(com, com_ier, 0); if (sio_getreg(com, com_iir) & IIR_NOPEND) { /* Yes. We discovered the TXRDY bug! */ SET_FLAG(dev, COM_C_IIR_TXRDYBUG); } else { /* No. Just fail. XXX */ result = ENXIO; sio_setreg(com, com_mcr, 0); } } else { /* Yes. No bug. */ CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); } sio_setreg(com, com_ier, 0); sio_setreg(com, com_cfcr, CFCR_8BITS); mtx_unlock_spin(&sio_lock); bus_release_resource(dev, SYS_RES_IOPORT, rid, port); if (iobase == siocniobase) result = 0; if (result != 0) { device_set_softc(dev, NULL); free(com, M_DEVBUF); } return (result); } /* * Check that * o the CFCR, IER and MCR in UART hold the values written to them * (the values happen to be all distinct - this is good for * avoiding false positive tests from bus echoes). * o an output interrupt is generated and its vector is correct. * o the interrupt goes away when the IIR in the UART is read. */ /* EXTRA DELAY? */ failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; failures[2] = sio_getreg(com, com_mcr) - mcr_image; DELAY(10000); /* Some internal modems need this time */ irqmap[1] = isa_irq_pending(); failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; #ifdef PC98 if (iod.if_type == COM_IF_RSA98III) inb(iobase + rsa_srr); #endif DELAY(1000); /* XXX */ irqmap[2] = isa_irq_pending(); failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; #ifdef PC98 if (iod.if_type == COM_IF_RSA98III) inb(iobase + rsa_srr); #endif /* * Turn off all device interrupts and check that they go off properly. * Leave MCR_IENABLE alone. For ports without a master port, it gates * the OUT2 output of the UART to * the ICU input. Closing the gate would give a floating ICU input * (unless there is another device driving it) and spurious interrupts. * (On the system that this was first tested on, the input floats high * and gives a (masked) interrupt as soon as the gate is closed.) */ sio_setreg(com, com_ier, 0); sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ failures[7] = sio_getreg(com, com_ier); #ifdef PC98 if (iod.if_type == COM_IF_RSA98III) outb(iobase + rsa_ier, 0x00); #endif DELAY(1000); /* XXX */ irqmap[3] = isa_irq_pending(); failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; #ifdef PC98 if (iod.if_type == COM_IF_RSA98III) { inb(iobase + rsa_srr); outb(iobase + rsa_frr, 0x00); } #endif mtx_unlock_spin(&sio_lock); irqs = irqmap[1] & ~irqmap[0]; if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && ((1 << xirq) & irqs) == 0) { printf( "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", device_get_unit(dev), xirq, irqs); printf( "sio%d: port may not be enabled\n", device_get_unit(dev)); } if (bootverbose) printf("sio%d: irq maps: %#x %#x %#x %#x\n", device_get_unit(dev), irqmap[0], irqmap[1], irqmap[2], irqmap[3]); result = 0; for (fn = 0; fn < sizeof failures; ++fn) if (failures[fn]) { sio_setreg(com, com_mcr, 0); result = ENXIO; if (bootverbose) { printf("sio%d: probe failed test(s):", device_get_unit(dev)); for (fn = 0; fn < sizeof failures; ++fn) if (failures[fn]) printf(" %d", fn); printf("\n"); } break; } bus_release_resource(dev, SYS_RES_IOPORT, rid, port); if (iobase == siocniobase) result = 0; if (result != 0) { device_set_softc(dev, NULL); free(com, M_DEVBUF); } return (result); } #ifdef COM_ESP static int espattach(com, esp_port) struct com_s *com; Port_t esp_port; { u_char dips; u_char val; /* * Check the ESP-specific I/O port to see if we're an ESP * card. If not, return failure immediately. */ if ((inb(esp_port) & 0xf3) == 0) { printf(" port 0x%x is not an ESP board?\n", esp_port); return (0); } /* * We've got something that claims to be a Hayes ESP card. * Let's hope so. */ /* Get the dip-switch configuration */ #ifdef PC98 outb(esp_port + ESP98_CMD1, ESP_GETDIPS); dips = inb(esp_port + ESP98_STATUS1); #else outb(esp_port + ESP_CMD1, ESP_GETDIPS); dips = inb(esp_port + ESP_STATUS1); #endif /* * Bits 0,1 of dips say which COM port we are. */ #ifdef PC98 if ((rman_get_start(com->ioportres) & 0xff) == likely_com_ports[dips & 0x03]) #else if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) #endif printf(" : ESP"); else { printf(" esp_port has com %d\n", dips & 0x03); return (0); } /* * Check for ESP version 2.0 or later: bits 4,5,6 = 010. */ #ifdef PC98 outb(esp_port + ESP98_CMD1, ESP_GETTEST); val = inb(esp_port + ESP98_STATUS1); /* clear reg 1 */ val = inb(esp_port + ESP98_STATUS2); #else outb(esp_port + ESP_CMD1, ESP_GETTEST); val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ val = inb(esp_port + ESP_STATUS2); #endif if ((val & 0x70) < 0x20) { printf("-old (%o)", val & 0x70); return (0); } /* * Check for ability to emulate 16550: bit 7 == 1 */ if ((dips & 0x80) == 0) { printf(" slave"); return (0); } /* * Okay, we seem to be a Hayes ESP card. Whee. */ com->esp = TRUE; com->esp_port = esp_port; return (1); } #endif /* COM_ESP */ int sioattach(dev, xrid, rclk) device_t dev; int xrid; u_long rclk; { struct com_s *com; #ifdef COM_ESP Port_t *espp; #endif Port_t iobase; int unit; u_int flags; int rid; struct resource *port; int ret; int error; struct tty *tp; #ifdef PC98 u_char *obuf; u_long obufsize; int if_type = GET_IFTYPE(device_get_flags(dev)); #endif rid = xrid; #ifdef PC98 if (IS_8251(if_type)) { port = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE); } else if (if_type == COM_IF_MODEM_CARD || if_type == COM_IF_RSA98III || isa_get_vendorid(dev)) { port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, if_16550a_type[if_type & 0x0f].iatsz, RF_ACTIVE); } else { port = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid, if_16550a_type[if_type & 0x0f].iat, if_16550a_type[if_type & 0x0f].iatsz, RF_ACTIVE); } #else port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, IO_COMSIZE, RF_ACTIVE); #endif if (!port) return (ENXIO); #ifdef PC98 if (!IS_8251(if_type)) { if (isa_load_resourcev(port, if_16550a_type[if_type & 0x0f].iat, if_16550a_type[if_type & 0x0f].iatsz) != 0) { bus_release_resource(dev, SYS_RES_IOPORT, rid, port); return ENXIO; } } #endif iobase = rman_get_start(port); unit = device_get_unit(dev); com = device_get_softc(dev); flags = device_get_flags(dev); if (unit >= sio_numunits) sio_numunits = unit + 1; #ifdef PC98 obufsize = 256; if (if_type == COM_IF_RSA98III) obufsize = 2048; if ((obuf = malloc(obufsize * 2, M_DEVBUF, M_NOWAIT)) == NULL) { bus_release_resource(dev, SYS_RES_IOPORT, rid, port); return ENXIO; } bzero(obuf, obufsize * 2); #endif /* * sioprobe() has initialized the device registers as follows: * o cfcr = CFCR_8BITS. * It is most important that CFCR_DLAB is off, so that the * data port is not hidden when we enable interrupts. * o ier = 0. * Interrupts are only enabled when the line is open. * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible * interrupt control register or the config specifies no irq. * Keeping MCR_DTR and MCR_RTS off might stop the external * device from sending before we are ready. */ bzero(com, sizeof *com); com->unit = unit; com->ioportres = port; com->ioportrid = rid; com->bst = rman_get_bustag(port); com->bsh = rman_get_bushandle(port); com->cfcr_image = CFCR_8BITS; com->loses_outints = COM_LOSESOUTINTS(flags) != 0; com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; com->tx_fifo_size = 1; #ifdef PC98 com->obufsize = obufsize; com->obuf1 = obuf; com->obuf2 = obuf + obufsize; #endif com->obufs[0].l_head = com->obuf1; com->obufs[1].l_head = com->obuf2; #ifdef PC98 com->pc98_if_type = if_type; if (IS_8251(if_type)) { pc98_set_ioport(com); if (if_type == COM_IF_INTERNAL && pc98_check_8251fifo()) { com->pc98_8251fifo = 1; com->pc98_8251fifo_enable = 0; } } else { bus_addr_t *iat = if_16550a_type[if_type & 0x0f].iat; com->data_port = iobase + iat[com_data]; com->int_ctl_port = iobase + iat[com_ier]; com->int_id_port = iobase + iat[com_iir]; com->modem_ctl_port = iobase + iat[com_mcr]; com->mcr_image = inb(com->modem_ctl_port); com->line_status_port = iobase + iat[com_lsr]; com->modem_status_port = iobase + iat[com_msr]; } #else /* not PC98 */ com->data_port = iobase + com_data; com->int_ctl_port = iobase + com_ier; com->int_id_port = iobase + com_iir; com->modem_ctl_port = iobase + com_mcr; com->mcr_image = inb(com->modem_ctl_port); com->line_status_port = iobase + com_lsr; com->modem_status_port = iobase + com_msr; #endif tp = com->tp = ttyalloc(); tp->t_oproc = comstart; tp->t_param = comparam; tp->t_stop = comstop; tp->t_modem = commodem; tp->t_break = combreak; tp->t_close = comclose; tp->t_open = comopen; tp->t_sc = com; #ifdef PC98 if (!IS_8251(if_type) && rclk == 0) rclk = if_16550a_type[if_type & 0x0f].rclk; #else if (rclk == 0) rclk = DEFAULT_RCLK; #endif com->rclk = rclk; if (unit == comconsole) ttyconsolemode(tp, comdefaultrate); error = siosetwater(com, tp->t_init_in.c_ispeed); mtx_unlock_spin(&sio_lock); if (error) { /* * Leave i/o resources allocated if this is a `cn'-level * console, so that other devices can't snarf them. */ if (iobase != siocniobase) bus_release_resource(dev, SYS_RES_IOPORT, rid, port); return (ENOMEM); } /* attempt to determine UART type */ printf("sio%d: type", unit); #ifndef PC98 if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags) && !COM_NOSCR(flags)) { u_char scr; u_char scr1; u_char scr2; scr = sio_getreg(com, com_scr); sio_setreg(com, com_scr, 0xa5); scr1 = sio_getreg(com, com_scr); sio_setreg(com, com_scr, 0x5a); scr2 = sio_getreg(com, com_scr); sio_setreg(com, com_scr, scr); if (scr1 != 0xa5 || scr2 != 0x5a) { printf(" 8250 or not responding"); goto determined_type; } } #endif /* !PC98 */ #ifdef PC98 if (IS_8251(com->pc98_if_type)) { if (com->pc98_8251fifo && !COM_NOFIFO(flags)) com->tx_fifo_size = 16; com_int_TxRx_disable( com ); com_cflag_and_speed_set( com, tp->t_init_in.c_cflag, comdefaultrate ); com_tiocm_bic( com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE ); com_send_break_off( com ); if (com->pc98_if_type == COM_IF_INTERNAL) { printf(" (internal%s%s)", com->pc98_8251fifo ? " fifo" : "", PC98SIO_baud_rate_port(com->pc98_if_type) != -1 ? " v-fast" : ""); } else { printf(" 8251%s", if_8251_type[com->pc98_if_type & 0x0f].name); } } else { #endif /* PC98 */ sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); DELAY(100); switch (inb(com->int_id_port) & IIR_FIFO_MASK) { case FIFO_RX_LOW: printf(" 16450"); break; case FIFO_RX_MEDL: printf(" 16450?"); break; case FIFO_RX_MEDH: printf(" 16550?"); break; case FIFO_RX_HIGH: if (COM_NOFIFO(flags)) { printf(" 16550A fifo disabled"); break; } com->hasfifo = TRUE; #ifdef PC98 if (com->pc98_if_type == COM_IF_RSA98III) { com->tx_fifo_size = 2048; com->rsabase = iobase; outb(com->rsabase + rsa_ier, 0x00); outb(com->rsabase + rsa_frr, 0x00); } #else if (COM_ST16650A(flags)) { printf(" ST16650A"); com->st16650a = TRUE; com->tx_fifo_size = 32; break; } if (COM_TI16754(flags)) { printf(" TI16754"); com->tx_fifo_size = 64; break; } #endif printf(" 16550A"); #ifdef COM_ESP #ifdef PC98 if (com->pc98_if_type == COM_IF_ESP98) #endif for (espp = likely_esp_ports; *espp != 0; espp++) if (espattach(com, *espp)) { com->tx_fifo_size = 1024; break; } if (com->esp) break; #endif #ifdef PC98 com->tx_fifo_size = 16; #else com->tx_fifo_size = COM_FIFOSIZE(flags); if (com->tx_fifo_size == 0) com->tx_fifo_size = 16; else printf(" lookalike with %u bytes FIFO", com->tx_fifo_size); #endif break; } #ifdef PC98 if (com->pc98_if_type == COM_IF_RSB3000) { /* Set RSB-2000/3000 Extended Buffer mode. */ u_char lcr; lcr = sio_getreg(com, com_cfcr); sio_setreg(com, com_cfcr, lcr | CFCR_DLAB); sio_setreg(com, com_emr, EMR_EXBUFF | EMR_EFMODE); sio_setreg(com, com_cfcr, lcr); } #endif #ifdef COM_ESP if (com->esp) { /* * Set 16550 compatibility mode. * We don't use the ESP_MODE_SCALE bit to increase the * fifo trigger levels because we can't handle large * bursts of input. * XXX flow control should be set in comparam(), not here. */ #ifdef PC98 outb(com->esp_port + ESP98_CMD1, ESP_SETMODE); outb(com->esp_port + ESP98_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); #else outb(com->esp_port + ESP_CMD1, ESP_SETMODE); outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); #endif /* Set RTS/CTS flow control. */ #ifdef PC98 outb(com->esp_port + ESP98_CMD1, ESP_SETFLOWTYPE); outb(com->esp_port + ESP98_CMD2, ESP_FLOW_RTS); outb(com->esp_port + ESP98_CMD2, ESP_FLOW_CTS); #else outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); #endif /* Set flow-control levels. */ #ifdef PC98 outb(com->esp_port + ESP98_CMD1, ESP_SETRXFLOW); outb(com->esp_port + ESP98_CMD2, HIBYTE(768)); outb(com->esp_port + ESP98_CMD2, LOBYTE(768)); outb(com->esp_port + ESP98_CMD2, HIBYTE(512)); outb(com->esp_port + ESP98_CMD2, LOBYTE(512)); #else outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); outb(com->esp_port + ESP_CMD2, HIBYTE(768)); outb(com->esp_port + ESP_CMD2, LOBYTE(768)); outb(com->esp_port + ESP_CMD2, HIBYTE(512)); outb(com->esp_port + ESP_CMD2, LOBYTE(512)); #endif #ifdef PC98 /* Set UART clock prescaler. */ outb(com->esp_port + ESP98_CMD1, ESP_SETCLOCK); outb(com->esp_port + ESP98_CMD2, 2); /* 4 times */ #endif } #endif /* COM_ESP */ sio_setreg(com, com_fifo, 0); #ifdef PC98 printf("%s", if_16550a_type[com->pc98_if_type & 0x0f].name); #else determined_type: ; #endif #ifdef COM_MULTIPORT if (COM_ISMULTIPORT(flags)) { device_t masterdev; com->multiport = TRUE; printf(" (multiport"); if (unit == COM_MPMASTER(flags)) printf(" master"); printf(")"); masterdev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, SYS_RES_IRQ, 0, NULL, NULL) != 0); } #endif /* COM_MULTIPORT */ #ifdef PC98 } #endif if (unit == comconsole) printf(", console"); if (COM_IIR_TXRDYBUG(flags)) printf(" with a buggy IIR_TXRDY implementation"); printf("\n"); if (sio_fast_ih == NULL) { swi_add(&tty_intr_event, "sio", siopoll, NULL, SWI_TTY, 0, &sio_fast_ih); swi_add(&clk_intr_event, "sio", siopoll, NULL, SWI_CLOCK, 0, &sio_slow_ih); } com->flags = flags; com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; tp->t_pps = &com->pps; if (COM_PPSCTS(flags)) com->pps_bit = MSR_CTS; else com->pps_bit = MSR_DCD; pps_init(&com->pps); rid = 0; com->irqres = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE); if (com->irqres) { ret = bus_setup_intr(dev, com->irqres, INTR_TYPE_TTY, siointr, NULL, com, &com->cookie); if (ret) { ret = bus_setup_intr(dev, com->irqres, INTR_TYPE_TTY, NULL, (driver_intr_t *)siointr, com, &com->cookie); if (ret == 0) device_printf(dev, "unable to activate interrupt in fast mode - using normal mode\n"); } if (ret) device_printf(dev, "could not activate interrupt\n"); #if defined(KDB) /* * Enable interrupts for early break-to-debugger support * on the console. */ if (ret == 0 && unit == comconsole) outb(siocniobase + com_ier, IER_ERXRDY | IER_ERLS | IER_EMSC); #endif } /* We're ready, open the doors... */ ttycreate(tp, TS_CALLOUT, "d%r", unit); return (0); } static int comopen(struct tty *tp, struct cdev *dev) { struct com_s *com; int i; com = tp->t_sc; com->poll = com->no_irq; com->poll_output = com->loses_outints; #ifdef PC98 if (IS_8251(com->pc98_if_type)) { com_tiocm_bis(com, TIOCM_DTR|TIOCM_RTS); pc98_msrint_start(dev); if (com->pc98_8251fifo) { com->pc98_8251fifo_enable = 1; outb(I8251F_fcr, FIFO_ENABLE | FIFO_XMT_RST | FIFO_RCV_RST); } } #endif if (com->hasfifo) { /* * (Re)enable and drain fifos. * * Certain SMC chips cause problems if the fifos * are enabled while input is ready. Turn off the * fifo if necessary to clear the input. We test * the input ready bit after enabling the fifos * since we've already enabled them in comparam() * and to handle races between enabling and fresh * input. */ for (i = 0; i < 500; i++) { sio_setreg(com, com_fifo, FIFO_RCV_RST | FIFO_XMT_RST | com->fifo_image); #ifdef PC98 if (com->pc98_if_type == COM_IF_RSA98III) outb(com->rsabase + rsa_frr , 0x00); #endif /* * XXX the delays are for superstitious * historical reasons. It must be less than * the character time at the maximum * supported speed (87 usec at 115200 bps * 8N1). Otherwise we might loop endlessly * if data is streaming in. We used to use * delays of 100. That usually worked * because DELAY(100) used to usually delay * for about 85 usec instead of 100. */ DELAY(50); #ifdef PC98 if (com->pc98_if_type == COM_IF_RSA98III ? !(inb(com->rsabase + rsa_srr) & 0x08) : !(inb(com->line_status_port) & LSR_RXRDY)) break; #else if (!(inb(com->line_status_port) & LSR_RXRDY)) break; #endif sio_setreg(com, com_fifo, 0); DELAY(50); (void) inb(com->data_port); } if (i == 500) return (EIO); } mtx_lock_spin(&sio_lock); #ifdef PC98 if (IS_8251(com->pc98_if_type)) { com_tiocm_bis(com, TIOCM_LE); com->pc98_prev_modem_status = pc98_get_modem_status(com); com_int_Rx_enable(com); } else { #endif (void) inb(com->line_status_port); (void) inb(com->data_port); com->prev_modem_status = com->last_modem_status = inb(com->modem_status_port); outb(com->int_ctl_port, IER_ERXRDY | IER_ERLS | IER_EMSC | (COM_IIR_TXRDYBUG(com->flags) ? 0 : IER_ETXRDY)); #ifdef PC98 if (com->pc98_if_type == COM_IF_RSA98III) { outb(com->rsabase + rsa_ier, 0x1d); outb(com->int_ctl_port, IER_ERLS | IER_EMSC); } #endif #ifdef PC98 } #endif mtx_unlock_spin(&sio_lock); siosettimeout(); /* XXX: should be generic ? */ #ifdef PC98 if ((IS_8251(com->pc98_if_type) && (pc98_get_modem_status(com) & TIOCM_CAR)) || (!IS_8251(com->pc98_if_type) && (com->prev_modem_status & MSR_DCD)) || ISCALLOUT(dev)) ttyld_modem(tp, 1); #else if (com->prev_modem_status & MSR_DCD || ISCALLOUT(dev)) ttyld_modem(tp, 1); #endif return (0); } static void comclose(tp) struct tty *tp; { int s; struct com_s *com; s = spltty(); com = tp->t_sc; com->poll = FALSE; com->poll_output = FALSE; #ifdef PC98 com_send_break_off(com); #else sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); #endif #if defined(KDB) /* * Leave interrupts enabled and don't clear DTR if this is the * console. This allows us to detect break-to-debugger events * while the console device is closed. */ if (com->unit != comconsole) #endif { #ifdef PC98 int tmp; if (IS_8251(com->pc98_if_type)) com_int_TxRx_disable(com); else sio_setreg(com, com_ier, 0); if (com->pc98_if_type == COM_IF_RSA98III) outb(com->rsabase + rsa_ier, 0x00); if (IS_8251(com->pc98_if_type)) tmp = pc98_get_modem_status(com) & TIOCM_CAR; else tmp = com->prev_modem_status & MSR_DCD; #else sio_setreg(com, com_ier, 0); #endif if (tp->t_cflag & HUPCL /* * XXX we will miss any carrier drop between here and the * next open. Perhaps we should watch DCD even when the * port is closed; it is not sufficient to check it at * the next open because it might go up and down while * we're not watching. */ || (!tp->t_actout #ifdef PC98 && !(tmp) #else && !(com->prev_modem_status & MSR_DCD) #endif && !(tp->t_init_in.c_cflag & CLOCAL)) || !(tp->t_state & TS_ISOPEN)) { #ifdef PC98 if (IS_8251(com->pc98_if_type)) com_tiocm_bic(com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE); else #endif (void)commodem(tp, 0, SER_DTR); ttydtrwaitstart(tp); } #ifdef PC98 else { if (IS_8251(com->pc98_if_type)) com_tiocm_bic(com, TIOCM_LE); } #endif } #ifdef PC98 if (com->pc98_8251fifo) { if (com->pc98_8251fifo_enable) outb(I8251F_fcr, FIFO_XMT_RST | FIFO_RCV_RST); com->pc98_8251fifo_enable = 0; } #endif if (com->hasfifo) { /* * Disable fifos so that they are off after controlled * reboots. Some BIOSes fail to detect 16550s when the * fifos are enabled. */ sio_setreg(com, com_fifo, 0); } tp->t_actout = FALSE; wakeup(&tp->t_actout); wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ siosettimeout(); splx(s); } static void siobusycheck(chan) void *chan; { struct com_s *com; int s; com = (struct com_s *)chan; /* * Clear TS_BUSY if low-level output is complete. * spl locking is sufficient because siointr1() does not set CS_BUSY. * If siointr1() clears CS_BUSY after we look at it, then we'll get * called again. Reading the line status port outside of siointr1() * is safe because CS_BUSY is clear so there are no output interrupts * to lose. */ s = spltty(); if (com->state & CS_BUSY) com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ #ifdef PC98 else if ((IS_8251(com->pc98_if_type) && ((com->pc98_8251fifo_enable && (inb(I8251F_lsr) & (FLSR_TxRDY | FLSR_TxEMP)) == (FLSR_TxRDY | FLSR_TxEMP)) || (!com->pc98_8251fifo_enable && (inb(com->sts_port) & (STS8251_TxRDY | STS8251_TxEMP)) == (STS8251_TxRDY | STS8251_TxEMP)))) || ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) == (LSR_TSRE | LSR_TXRDY))) { #else else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) == (LSR_TSRE | LSR_TXRDY)) { #endif com->tp->t_state &= ~TS_BUSY; ttwwakeup(com->tp); com->extra_state &= ~CSE_BUSYCHECK; } else timeout(siobusycheck, com, hz / 100); splx(s); } static u_int siodivisor(rclk, speed) u_long rclk; speed_t speed; { long actual_speed; u_int divisor; int error; if (speed == 0) return (0); #if UINT_MAX > (ULONG_MAX - 1) / 8 if (speed > (ULONG_MAX - 1) / 8) return (0); #endif divisor = (rclk / (8UL * speed) + 1) / 2; if (divisor == 0 || divisor >= 65536) return (0); actual_speed = rclk / (16UL * divisor); /* 10 times error in percent: */ error = ((actual_speed - (long)speed) * 2000 / (long)speed + 1) / 2; /* 3.0% maximum error tolerance: */ if (error < -30 || error > 30) return (0); return (divisor); } /* * Call this function with the sio_lock mutex held. It will return with the * lock still held. */ static void sioinput(com) struct com_s *com; { u_char *buf; int incc; u_char line_status; int recv_data; struct tty *tp; buf = com->ibuf; tp = com->tp; if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { com_events -= (com->iptr - com->ibuf); com->iptr = com->ibuf; return; } if (tp->t_state & TS_CAN_BYPASS_L_RINT) { /* * Avoid the grotesquely inefficient lineswitch routine * (ttyinput) in "raw" mode. It usually takes about 450 * instructions (that's without canonical processing or echo!). * slinput is reasonably fast (usually 40 instructions plus * call overhead). */ do { /* * This may look odd, but it is using save-and-enable * semantics instead of the save-and-disable semantics * that are used everywhere else. */ mtx_unlock_spin(&sio_lock); incc = com->iptr - buf; if (tp->t_rawq.c_cc + incc > tp->t_ihiwat && (com->state & CS_RTS_IFLOW || tp->t_iflag & IXOFF) && !(tp->t_state & TS_TBLOCK)) ttyblock(tp); com->delta_error_counts[CE_TTY_BUF_OVERFLOW] += b_to_q((char *)buf, incc, &tp->t_rawq); buf += incc; tk_nin += incc; tk_rawcc += incc; tp->t_rawcc += incc; ttwakeup(tp); if (tp->t_state & TS_TTSTOP && (tp->t_iflag & IXANY || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { tp->t_state &= ~TS_TTSTOP; tp->t_lflag &= ~FLUSHO; comstart(tp); } mtx_lock_spin(&sio_lock); } while (buf < com->iptr); } else { do { /* * This may look odd, but it is using save-and-enable * semantics instead of the save-and-disable semantics * that are used everywhere else. */ mtx_unlock_spin(&sio_lock); line_status = buf[com->ierroff]; recv_data = *buf++; if (line_status & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { if (line_status & LSR_BI) recv_data |= TTY_BI; if (line_status & LSR_FE) recv_data |= TTY_FE; if (line_status & LSR_OE) recv_data |= TTY_OE; if (line_status & LSR_PE) recv_data |= TTY_PE; } ttyld_rint(tp, recv_data); mtx_lock_spin(&sio_lock); } while (buf < com->iptr); } com_events -= (com->iptr - com->ibuf); com->iptr = com->ibuf; /* * There is now room for another low-level buffer full of input, * so enable RTS if it is now disabled and there is room in the * high-level buffer. */ #ifdef PC98 if (IS_8251(com->pc98_if_type)) { if ((com->state & CS_RTS_IFLOW) && !(com_tiocm_get(com) & TIOCM_RTS) && !(tp->t_state & TS_TBLOCK)) com_tiocm_bis(com, TIOCM_RTS); } else { if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && !(tp->t_state & TS_TBLOCK)) outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); } #else if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && !(tp->t_state & TS_TBLOCK)) outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); #endif } static int siointr(arg) void *arg; { struct com_s *com; #if defined(PC98) && defined(COM_MULTIPORT) u_char rsa_buf_status; #endif #ifndef COM_MULTIPORT com = (struct com_s *)arg; mtx_lock_spin(&sio_lock); siointr1(com); mtx_unlock_spin(&sio_lock); #else /* COM_MULTIPORT */ bool_t possibly_more_intrs; int unit; /* * Loop until there is no activity on any port. This is necessary * to get an interrupt edge more than to avoid another interrupt. * If the IRQ signal is just an OR of the IRQ signals from several * devices, then the edge from one may be lost because another is * on. */ mtx_lock_spin(&sio_lock); do { possibly_more_intrs = FALSE; for (unit = 0; unit < sio_numunits; ++unit) { com = com_addr(unit); /* * XXX COM_LOCK(); * would it work here, or be counter-productive? */ #ifdef PC98 if (com != NULL && !com->gone && IS_8251(com->pc98_if_type)) { siointr1(com); } else if (com != NULL && !com->gone && com->pc98_if_type == COM_IF_RSA98III) { rsa_buf_status = inb(com->rsabase + rsa_srr) & 0xc9; if ((rsa_buf_status & 0xc8) || !(rsa_buf_status & 0x01)) { siointr1(com); if (rsa_buf_status != (inb(com->rsabase + rsa_srr) & 0xc9)) possibly_more_intrs = TRUE; } } else #endif if (com != NULL && !com->gone && (inb(com->int_id_port) & IIR_IMASK) != IIR_NOPEND) { siointr1(com); possibly_more_intrs = TRUE; } /* XXX COM_UNLOCK(); */ } } while (possibly_more_intrs); mtx_unlock_spin(&sio_lock); #endif /* COM_MULTIPORT */ return (FILTER_HANDLED); } static struct timespec siots[8]; static int siotso; static int volatile siotsunit = -1; static int sysctl_siots(SYSCTL_HANDLER_ARGS) { char buf[128]; long long delta; size_t len; int error, i, tso; for (i = 1, tso = siotso; i < tso; i++) { delta = (long long)(siots[i].tv_sec - siots[i - 1].tv_sec) * 1000000000 + (siots[i].tv_nsec - siots[i - 1].tv_nsec); len = sprintf(buf, "%lld\n", delta); if (delta >= 110000) len += sprintf(buf + len - 1, ": *** %ld.%09ld\n", (long)siots[i].tv_sec, siots[i].tv_nsec) - 1; if (i == tso - 1) buf[len - 1] = '\0'; error = SYSCTL_OUT(req, buf, len); if (error != 0) return (error); } return (0); } SYSCTL_PROC(_machdep, OID_AUTO, siots, CTLTYPE_STRING | CTLFLAG_RD, 0, 0, sysctl_siots, "A", "sio timestamps"); static void siointr1(com) struct com_s *com; { u_char int_ctl; u_char int_ctl_new; u_char line_status; u_char modem_status; u_char *ioptr; u_char recv_data; #ifdef PC98 u_char tmp = 0; u_char rsa_buf_status = 0; int rsa_tx_fifo_size = 0; #endif /* PC98 */ #if defined(KDB) int kdb_brk; again: #endif if (COM_IIR_TXRDYBUG(com->flags)) { int_ctl = inb(com->int_ctl_port); int_ctl_new = int_ctl; } else { int_ctl = 0; int_ctl_new = 0; } while (!com->gone) { #ifdef PC98 status_read:; if (IS_8251(com->pc98_if_type)) { if (com->pc98_8251fifo_enable) tmp = inb(I8251F_lsr); else tmp = inb(com->sts_port); more_intr: line_status = 0; if (com->pc98_8251fifo_enable) { if (tmp & FLSR_TxRDY) line_status |= LSR_TXRDY; if (tmp & FLSR_RxRDY) line_status |= LSR_RXRDY; if (tmp & FLSR_TxEMP) line_status |= LSR_TSRE; if (tmp & FLSR_PE) line_status |= LSR_PE; if (tmp & FLSR_OE) line_status |= LSR_OE; if (tmp & FLSR_BI) line_status |= LSR_BI; } else { if (tmp & STS8251_TxRDY) line_status |= LSR_TXRDY; if (tmp & STS8251_RxRDY) line_status |= LSR_RXRDY; if (tmp & STS8251_TxEMP) line_status |= LSR_TSRE; if (tmp & STS8251_PE) line_status |= LSR_PE; if (tmp & STS8251_OE) line_status |= LSR_OE; if (tmp & STS8251_FE) line_status |= LSR_FE; if (tmp & STS8251_BI) line_status |= LSR_BI; } } else { #endif /* PC98 */ if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { modem_status = inb(com->modem_status_port); if ((modem_status ^ com->last_modem_status) & com->pps_bit) { pps_capture(&com->pps); pps_event(&com->pps, (modem_status & com->pps_bit) ? PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); } } line_status = inb(com->line_status_port); #ifdef PC98 } if (com->pc98_if_type == COM_IF_RSA98III) rsa_buf_status = inb(com->rsabase + rsa_srr); #endif /* PC98 */ /* input event? (check first to help avoid overruns) */ #ifndef PC98 while (line_status & LSR_RCV_MASK) { #else while ((line_status & LSR_RCV_MASK) || (com->pc98_if_type == COM_IF_RSA98III && (rsa_buf_status & 0x08))) { #endif /* PC98 */ /* break/unnattached error bits or real input? */ #ifdef PC98 if (IS_8251(com->pc98_if_type)) { if (com->pc98_8251fifo_enable) { recv_data = inb(I8251F_data); if (tmp & (FLSR_PE | FLSR_OE | FLSR_BI)) { pc98_i8251_or_cmd(com, CMD8251_ER); recv_data = 0; } } else { recv_data = inb(com->data_port); if (tmp & (STS8251_PE | STS8251_OE | STS8251_FE | STS8251_BI)) { pc98_i8251_or_cmd(com, CMD8251_ER); recv_data = 0; } } } else if (com->pc98_if_type == COM_IF_RSA98III) { if (!(rsa_buf_status & 0x08)) recv_data = 0; else recv_data = inb(com->data_port); } else #endif if (!(line_status & LSR_RXRDY)) recv_data = 0; else recv_data = inb(com->data_port); #ifdef KDB if (com->unit == comconsole && (kdb_brk = kdb_alt_break(recv_data, &com->alt_brk_state)) != 0) { goto again; } #endif /* KDB */ if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { /* * Don't store BI if IGNBRK or FE/PE if IGNPAR. * Otherwise, push the work to a higher level * (to handle PARMRK) if we're bypassing. * Otherwise, convert BI/FE and PE+INPCK to 0. * * This makes bypassing work right in the * usual "raw" case (IGNBRK set, and IGNPAR * and INPCK clear). * * Note: BI together with FE/PE means just BI. */ if (line_status & LSR_BI) { #if defined(KDB) if (com->unit == comconsole) { kdb_enter(KDB_WHY_BREAK, "Line break on console"); goto cont; } #endif if (com->tp == NULL || com->tp->t_iflag & IGNBRK) goto cont; } else { if (com->tp == NULL || com->tp->t_iflag & IGNPAR) goto cont; } if (com->tp->t_state & TS_CAN_BYPASS_L_RINT && (line_status & (LSR_BI | LSR_FE) || com->tp->t_iflag & INPCK)) recv_data = 0; } ++com->bytes_in; if (com->tp != NULL && com->tp->t_hotchar != 0 && recv_data == com->tp->t_hotchar) swi_sched(sio_fast_ih, 0); ioptr = com->iptr; if (ioptr >= com->ibufend) CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); else { if (com->tp != NULL && com->tp->t_do_timestamp) microtime(&com->tp->t_timestamp); ++com_events; swi_sched(sio_slow_ih, SWI_DELAY); #if 0 /* for testing input latency vs efficiency */ if (com->iptr - com->ibuf == 8) swi_sched(sio_fast_ih, 0); #endif ioptr[0] = recv_data; ioptr[com->ierroff] = line_status; com->iptr = ++ioptr; if (ioptr == com->ihighwater && com->state & CS_RTS_IFLOW) #ifdef PC98 IS_8251(com->pc98_if_type) ? com_tiocm_bic(com, TIOCM_RTS) : #endif outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); if (line_status & LSR_OE) CE_RECORD(com, CE_OVERRUN); } cont: if (line_status & LSR_TXRDY && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) goto txrdy; /* * "& 0x7F" is to avoid the gcc-1.40 generating a slow * jump from the top of the loop to here */ #ifdef PC98 if (IS_8251(com->pc98_if_type)) goto status_read; else #endif line_status = inb(com->line_status_port) & 0x7F; #ifdef PC98 if (com->pc98_if_type == COM_IF_RSA98III) rsa_buf_status = inb(com->rsabase + rsa_srr); #endif /* PC98 */ } /* modem status change? (always check before doing output) */ #ifdef PC98 if (!IS_8251(com->pc98_if_type)) { #endif modem_status = inb(com->modem_status_port); if (modem_status != com->last_modem_status) { /* * Schedule high level to handle DCD changes. Note * that we don't use the delta bits anywhere. Some * UARTs mess them up, and it's easy to remember the * previous bits and calculate the delta. */ com->last_modem_status = modem_status; if (!(com->state & CS_CHECKMSR)) { com_events += LOTS_OF_EVENTS; com->state |= CS_CHECKMSR; swi_sched(sio_fast_ih, 0); } /* handle CTS change immediately for crisp flow ctl */ if (com->state & CS_CTS_OFLOW) { if (modem_status & MSR_CTS) com->state |= CS_ODEVREADY; else com->state &= ~CS_ODEVREADY; } } #ifdef PC98 } #endif txrdy: /* output queued and everything ready? */ #ifndef PC98 if (line_status & LSR_TXRDY && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { #else if (((com->pc98_if_type == COM_IF_RSA98III) ? (rsa_buf_status & 0x02) : (line_status & LSR_TXRDY)) && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { #endif #ifdef PC98 Port_t tmp_data_port; if (IS_8251(com->pc98_if_type) && com->pc98_8251fifo_enable) tmp_data_port = I8251F_data; else tmp_data_port = com->data_port; #endif ioptr = com->obufq.l_head; if (com->tx_fifo_size > 1 && com->unit != siotsunit) { u_int ocount; ocount = com->obufq.l_tail - ioptr; #ifdef PC98 if (com->pc98_if_type == COM_IF_RSA98III) { rsa_buf_status = inb(com->rsabase + rsa_srr); rsa_tx_fifo_size = 1024; if (!(rsa_buf_status & 0x01)) rsa_tx_fifo_size = 2048; if (ocount > rsa_tx_fifo_size) ocount = rsa_tx_fifo_size; } else #endif if (ocount > com->tx_fifo_size) ocount = com->tx_fifo_size; com->bytes_out += ocount; do #ifdef PC98 outb(tmp_data_port, *ioptr++); #else outb(com->data_port, *ioptr++); #endif while (--ocount != 0); } else { #ifdef PC98 outb(tmp_data_port, *ioptr++); #else outb(com->data_port, *ioptr++); #endif ++com->bytes_out; if (com->unit == siotsunit && siotso < sizeof siots / sizeof siots[0]) nanouptime(&siots[siotso++]); } #ifdef PC98 if (IS_8251(com->pc98_if_type)) if (!(pc98_check_i8251_interrupt(com) & IEN_TxFLAG)) com_int_Tx_enable(com); #endif com->obufq.l_head = ioptr; if (COM_IIR_TXRDYBUG(com->flags)) int_ctl_new = int_ctl | IER_ETXRDY; if (ioptr >= com->obufq.l_tail) { struct lbq *qp; qp = com->obufq.l_next; qp->l_queued = FALSE; qp = qp->l_next; if (qp != NULL) { com->obufq.l_head = qp->l_head; com->obufq.l_tail = qp->l_tail; com->obufq.l_next = qp; } else { /* output just completed */ if (COM_IIR_TXRDYBUG(com->flags)) int_ctl_new = int_ctl & ~IER_ETXRDY; com->state &= ~CS_BUSY; #if defined(PC98) if (IS_8251(com->pc98_if_type) && pc98_check_i8251_interrupt(com) & IEN_TxFLAG) com_int_Tx_disable(com); #endif } if (!(com->state & CS_ODONE)) { com_events += LOTS_OF_EVENTS; com->state |= CS_ODONE; /* handle at high level ASAP */ swi_sched(sio_fast_ih, 0); } } #ifdef PC98 if (COM_IIR_TXRDYBUG(com->flags) && int_ctl != int_ctl_new) { if (com->pc98_if_type == COM_IF_RSA98III) { int_ctl_new &= ~(IER_ETXRDY | IER_ERXRDY); outb(com->int_ctl_port, int_ctl_new); outb(com->rsabase + rsa_ier, 0x1d); } else outb(com->int_ctl_port, int_ctl_new); } #else if (COM_IIR_TXRDYBUG(com->flags) && int_ctl != int_ctl_new) outb(com->int_ctl_port, int_ctl_new); #endif } #ifdef PC98 else if (line_status & LSR_TXRDY) { if (IS_8251(com->pc98_if_type)) if (pc98_check_i8251_interrupt(com) & IEN_TxFLAG) com_int_Tx_disable(com); } if (IS_8251(com->pc98_if_type)) { if (com->pc98_8251fifo_enable) { if ((tmp = inb(I8251F_lsr)) & FLSR_RxRDY) goto more_intr; } else { if ((tmp = inb(com->sts_port)) & STS8251_RxRDY) goto more_intr; } } #endif /* finished? */ #ifndef COM_MULTIPORT #ifdef PC98 if (IS_8251(com->pc98_if_type)) return; #endif if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) #endif /* COM_MULTIPORT */ return; } } /* software interrupt handler for SWI_TTY */ static void siopoll(void *dummy) { int unit; if (com_events == 0) return; repeat: for (unit = 0; unit < sio_numunits; ++unit) { struct com_s *com; int incc; struct tty *tp; com = com_addr(unit); if (com == NULL) continue; tp = com->tp; if (tp == NULL || com->gone) { /* * Discard any events related to never-opened or * going-away devices. */ mtx_lock_spin(&sio_lock); incc = com->iptr - com->ibuf; com->iptr = com->ibuf; if (com->state & CS_CHECKMSR) { incc += LOTS_OF_EVENTS; com->state &= ~CS_CHECKMSR; } com_events -= incc; mtx_unlock_spin(&sio_lock); continue; } if (com->iptr != com->ibuf) { mtx_lock_spin(&sio_lock); sioinput(com); mtx_unlock_spin(&sio_lock); } if (com->state & CS_CHECKMSR) { u_char delta_modem_status; #ifdef PC98 if (!IS_8251(com->pc98_if_type)) { #endif mtx_lock_spin(&sio_lock); delta_modem_status = com->last_modem_status ^ com->prev_modem_status; com->prev_modem_status = com->last_modem_status; com_events -= LOTS_OF_EVENTS; com->state &= ~CS_CHECKMSR; mtx_unlock_spin(&sio_lock); if (delta_modem_status & MSR_DCD) ttyld_modem(tp, com->prev_modem_status & MSR_DCD); #ifdef PC98 } #endif } if (com->state & CS_ODONE) { mtx_lock_spin(&sio_lock); com_events -= LOTS_OF_EVENTS; com->state &= ~CS_ODONE; mtx_unlock_spin(&sio_lock); if (!(com->state & CS_BUSY) && !(com->extra_state & CSE_BUSYCHECK)) { timeout(siobusycheck, com, hz / 100); com->extra_state |= CSE_BUSYCHECK; } ttyld_start(tp); } if (com_events == 0) break; } if (com_events >= LOTS_OF_EVENTS) goto repeat; } static void combreak(tp, sig) struct tty *tp; int sig; { struct com_s *com; com = tp->t_sc; #ifdef PC98 if (sig) com_send_break_on(com); else com_send_break_off(com); #else if (sig) sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); else sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); #endif } static int comparam(tp, t) struct tty *tp; struct termios *t; { u_int cfcr; int cflag; struct com_s *com; u_int divisor; u_char dlbh; u_char dlbl; u_char efr_flowbits; int s; #ifdef PC98 u_char param = 0; #endif com = tp->t_sc; if (com == NULL) return (ENODEV); #ifdef PC98 cfcr = 0; if (IS_8251(com->pc98_if_type)) { if (pc98_ttspeedtab(com, t->c_ospeed, &divisor) != 0) return (EINVAL); } else { #endif /* check requested parameters */ if (t->c_ispeed != (t->c_ospeed != 0 ? t->c_ospeed : tp->t_ospeed)) return (EINVAL); divisor = siodivisor(com->rclk, t->c_ispeed); if (divisor == 0) return (EINVAL); #ifdef PC98 } #endif /* parameters are OK, convert them to the com struct and the device */ s = spltty(); #ifdef PC98 if (IS_8251(com->pc98_if_type)) { if (t->c_ospeed == 0) com_tiocm_bic(com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE); else com_tiocm_bis(com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE); } else #endif if (t->c_ospeed == 0) (void)commodem(tp, 0, SER_DTR); /* hang up line */ else (void)commodem(tp, SER_DTR, 0); cflag = t->c_cflag; #ifdef PC98 if (!IS_8251(com->pc98_if_type)) { #endif switch (cflag & CSIZE) { case CS5: cfcr = CFCR_5BITS; break; case CS6: cfcr = CFCR_6BITS; break; case CS7: cfcr = CFCR_7BITS; break; default: cfcr = CFCR_8BITS; break; } if (cflag & PARENB) { cfcr |= CFCR_PENAB; if (!(cflag & PARODD)) cfcr |= CFCR_PEVEN; } if (cflag & CSTOPB) cfcr |= CFCR_STOPB; if (com->hasfifo) { /* * Use a fifo trigger level low enough so that the input * latency from the fifo is less than about 16 msec and * the total latency is less than about 30 msec. These * latencies are reasonable for humans. Serial comms * protocols shouldn't expect anything better since modem * latencies are larger. * * The fifo trigger level cannot be set at RX_HIGH for high * speed connections without further work on reducing * interrupt disablement times in other parts of the system, * without producing silo overflow errors. */ com->fifo_image = com->unit == siotsunit ? 0 : t->c_ispeed <= 4800 ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH; #ifdef COM_ESP /* * The Hayes ESP card needs the fifo DMA mode bit set * in compatibility mode. If not, it will interrupt * for each character received. */ if (com->esp) com->fifo_image |= FIFO_DMA_MODE; #endif sio_setreg(com, com_fifo, com->fifo_image); } #ifdef PC98 } #endif /* * This returns with interrupts disabled so that we can complete * the speed change atomically. Keeping interrupts disabled is * especially important while com_data is hidden. */ (void) siosetwater(com, t->c_ispeed); #ifdef PC98 if (IS_8251(com->pc98_if_type)) com_cflag_and_speed_set(com, cflag, t->c_ospeed); else { #endif sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); /* * Only set the divisor registers if they would change, since on * some 16550 incompatibles (UMC8669F), setting them while input * is arriving loses sync until data stops arriving. */ dlbl = divisor & 0xFF; if (sio_getreg(com, com_dlbl) != dlbl) sio_setreg(com, com_dlbl, dlbl); dlbh = divisor >> 8; if (sio_getreg(com, com_dlbh) != dlbh) sio_setreg(com, com_dlbh, dlbh); #ifdef PC98 } #endif efr_flowbits = 0; if (cflag & CRTS_IFLOW) { com->state |= CS_RTS_IFLOW; efr_flowbits |= EFR_AUTORTS; /* * If CS_RTS_IFLOW just changed from off to on, the change * needs to be propagated to MCR_RTS. This isn't urgent, * so do it later by calling comstart() instead of repeating * a lot of code from comstart() here. */ } else if (com->state & CS_RTS_IFLOW) { com->state &= ~CS_RTS_IFLOW; /* * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS * on here, since comstart() won't do it later. */ #ifdef PC98 if (IS_8251(com->pc98_if_type)) com_tiocm_bis(com, TIOCM_RTS); else outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); #else outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); #endif } /* * Set up state to handle output flow control. * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? * Now has 10+ msec latency, while CTS flow has 50- usec latency. */ com->state |= CS_ODEVREADY; com->state &= ~CS_CTS_OFLOW; #ifdef PC98 if (com->pc98_if_type == COM_IF_RSA98III) { param = inb(com->rsabase + rsa_msr); outb(com->rsabase + rsa_msr, param & 0x14); } #endif if (cflag & CCTS_OFLOW) { com->state |= CS_CTS_OFLOW; efr_flowbits |= EFR_AUTOCTS; #ifdef PC98 if (IS_8251(com->pc98_if_type)) { if (!(pc98_get_modem_status(com) & TIOCM_CTS)) com->state &= ~CS_ODEVREADY; } else if (com->pc98_if_type == COM_IF_RSA98III) { /* Set automatic flow control mode */ outb(com->rsabase + rsa_msr, param | 0x08); } else #endif if (!(com->last_modem_status & MSR_CTS)) com->state &= ~CS_ODEVREADY; } #ifdef PC98 if (!IS_8251(com->pc98_if_type)) sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); #else if (com->st16650a) { sio_setreg(com, com_lcr, LCR_EFR_ENABLE); sio_setreg(com, com_efr, (sio_getreg(com, com_efr) & ~(EFR_AUTOCTS | EFR_AUTORTS)) | efr_flowbits); } sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); #endif /* XXX shouldn't call functions while intrs are disabled. */ ttyldoptim(tp); mtx_unlock_spin(&sio_lock); splx(s); comstart(tp); if (com->ibufold != NULL) { free(com->ibufold, M_DEVBUF); com->ibufold = NULL; } return (0); } /* * This function must be called with the sio_lock mutex released and will * return with it obtained. */ static int siosetwater(com, speed) struct com_s *com; speed_t speed; { int cp4ticks; u_char *ibuf; int ibufsize; struct tty *tp; /* * Make the buffer size large enough to handle a softtty interrupt * latency of about 2 ticks without loss of throughput or data * (about 3 ticks if input flow control is not used or not honoured, * but a bit less for CS5-CS7 modes). */ cp4ticks = speed / 10 / hz * 4; for (ibufsize = 128; ibufsize < cp4ticks;) ibufsize <<= 1; #ifdef PC98 if (com->pc98_if_type == COM_IF_RSA98III) ibufsize = 2048; #endif if (ibufsize == com->ibufsize) { mtx_lock_spin(&sio_lock); return (0); } /* * Allocate input buffer. The extra factor of 2 in the size is * to allow for an error byte for each input byte. */ ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); if (ibuf == NULL) { mtx_lock_spin(&sio_lock); return (ENOMEM); } /* Initialize non-critical variables. */ com->ibufold = com->ibuf; com->ibufsize = ibufsize; tp = com->tp; if (tp != NULL) { tp->t_ififosize = 2 * ibufsize; tp->t_ispeedwat = (speed_t)-1; tp->t_ospeedwat = (speed_t)-1; } /* * Read current input buffer, if any. Continue with interrupts * disabled. */ mtx_lock_spin(&sio_lock); if (com->iptr != com->ibuf) sioinput(com); /*- * Initialize critical variables, including input buffer watermarks. * The external device is asked to stop sending when the buffer * exactly reaches high water, or when the high level requests it. * The high level is notified immediately (rather than at a later * clock tick) when this watermark is reached. * The buffer size is chosen so the watermark should almost never * be reached. * The low watermark is invisibly 0 since the buffer is always * emptied all at once. */ com->iptr = com->ibuf = ibuf; com->ibufend = ibuf + ibufsize; com->ierroff = ibufsize; com->ihighwater = ibuf + 3 * ibufsize / 4; return (0); } static void comstart(tp) struct tty *tp; { struct com_s *com; int s; com = tp->t_sc; if (com == NULL) return; s = spltty(); mtx_lock_spin(&sio_lock); if (tp->t_state & TS_TTSTOP) com->state &= ~CS_TTGO; else com->state |= CS_TTGO; if (tp->t_state & TS_TBLOCK) { #ifdef PC98 if (IS_8251(com->pc98_if_type)) { if ((com_tiocm_get(com) & TIOCM_RTS) && (com->state & CS_RTS_IFLOW)) com_tiocm_bic(com, TIOCM_RTS); } else { if ((com->mcr_image & MCR_RTS) && (com->state & CS_RTS_IFLOW)) outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); } #else if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); #endif } else { #ifdef PC98 if (IS_8251(com->pc98_if_type)) { if (!(com_tiocm_get(com) & TIOCM_RTS) && com->iptr < com->ihighwater && com->state & CS_RTS_IFLOW) com_tiocm_bis(com, TIOCM_RTS); } else { if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater && com->state & CS_RTS_IFLOW) outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); } #else if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater && com->state & CS_RTS_IFLOW) outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); #endif } mtx_unlock_spin(&sio_lock); if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { ttwwakeup(tp); splx(s); return; } if (tp->t_outq.c_cc != 0) { struct lbq *qp; struct lbq *next; if (!com->obufs[0].l_queued) { com->obufs[0].l_tail = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, #ifdef PC98 com->obufsize); #else sizeof com->obuf1); #endif com->obufs[0].l_next = NULL; com->obufs[0].l_queued = TRUE; mtx_lock_spin(&sio_lock); if (com->state & CS_BUSY) { qp = com->obufq.l_next; while ((next = qp->l_next) != NULL) qp = next; qp->l_next = &com->obufs[0]; } else { com->obufq.l_head = com->obufs[0].l_head; com->obufq.l_tail = com->obufs[0].l_tail; com->obufq.l_next = &com->obufs[0]; com->state |= CS_BUSY; } mtx_unlock_spin(&sio_lock); } if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { com->obufs[1].l_tail = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, #ifdef PC98 com->obufsize); #else sizeof com->obuf2); #endif com->obufs[1].l_next = NULL; com->obufs[1].l_queued = TRUE; mtx_lock_spin(&sio_lock); if (com->state & CS_BUSY) { qp = com->obufq.l_next; while ((next = qp->l_next) != NULL) qp = next; qp->l_next = &com->obufs[1]; } else { com->obufq.l_head = com->obufs[1].l_head; com->obufq.l_tail = com->obufs[1].l_tail; com->obufq.l_next = &com->obufs[1]; com->state |= CS_BUSY; } mtx_unlock_spin(&sio_lock); } tp->t_state |= TS_BUSY; } mtx_lock_spin(&sio_lock); if (com->state >= (CS_BUSY | CS_TTGO)) siointr1(com); /* fake interrupt to start output */ mtx_unlock_spin(&sio_lock); ttwwakeup(tp); splx(s); } static void comstop(tp, rw) struct tty *tp; int rw; { struct com_s *com; #ifdef PC98 int rsa98_tmp = 0; #endif com = tp->t_sc; if (com == NULL || com->gone) return; mtx_lock_spin(&sio_lock); if (rw & FWRITE) { #ifdef PC98 if (!IS_8251(com->pc98_if_type)) { #endif if (com->hasfifo) #ifdef COM_ESP /* XXX avoid h/w bug. */ if (!com->esp) #endif sio_setreg(com, com_fifo, FIFO_XMT_RST | com->fifo_image); #ifdef PC98 if (com->pc98_if_type == COM_IF_RSA98III) for (rsa98_tmp = 0; rsa98_tmp < 2048; rsa98_tmp++) sio_setreg(com, com_fifo, FIFO_XMT_RST | com->fifo_image); } #endif com->obufs[0].l_queued = FALSE; com->obufs[1].l_queued = FALSE; if (com->state & CS_ODONE) com_events -= LOTS_OF_EVENTS; com->state &= ~(CS_ODONE | CS_BUSY); com->tp->t_state &= ~TS_BUSY; } if (rw & FREAD) { #ifdef PC98 if (!IS_8251(com->pc98_if_type)) { if (com->pc98_if_type == COM_IF_RSA98III) for (rsa98_tmp = 0; rsa98_tmp < 2048; rsa98_tmp++) sio_getreg(com, com_data); #endif if (com->hasfifo) #ifdef COM_ESP /* XXX avoid h/w bug. */ if (!com->esp) #endif sio_setreg(com, com_fifo, FIFO_RCV_RST | com->fifo_image); #ifdef PC98 } #endif com_events -= (com->iptr - com->ibuf); com->iptr = com->ibuf; } mtx_unlock_spin(&sio_lock); comstart(tp); } static int commodem(struct tty *tp, int sigon, int sigoff) { struct com_s *com; int bitand, bitor, msr; #ifdef PC98 int clr, set; #endif com = tp->t_sc; if (com->gone) return(0); if (sigon != 0 || sigoff != 0) { #ifdef PC98 if (IS_8251(com->pc98_if_type)) { bitand = bitor = 0; clr = set = 0; if (sigoff & SER_DTR) { bitand |= TIOCM_DTR; clr |= CMD8251_DTR; } if (sigoff & SER_RTS) { bitand |= TIOCM_RTS; clr |= CMD8251_RxEN | CMD8251_RTS; } if (sigon & SER_DTR) { bitor |= TIOCM_DTR; set |= CMD8251_TxEN | CMD8251_RxEN | CMD8251_DTR; } if (sigon & SER_RTS) { bitor |= TIOCM_RTS; set |= CMD8251_TxEN | CMD8251_RxEN | CMD8251_RTS; } bitand = ~bitand; mtx_lock_spin(&sio_lock); com->pc98_prev_modem_status &= bitand; com->pc98_prev_modem_status |= bitor; pc98_i8251_clear_or_cmd(com, clr, set); mtx_unlock_spin(&sio_lock); return (0); } else { #endif bitand = bitor = 0; if (sigoff & SER_DTR) bitand |= MCR_DTR; if (sigoff & SER_RTS) bitand |= MCR_RTS; if (sigon & SER_DTR) bitor |= MCR_DTR; if (sigon & SER_RTS) bitor |= MCR_RTS; bitand = ~bitand; mtx_lock_spin(&sio_lock); com->mcr_image &= bitand; com->mcr_image |= bitor; outb(com->modem_ctl_port, com->mcr_image); mtx_unlock_spin(&sio_lock); return (0); #ifdef PC98 } #endif } else { #ifdef PC98 if (IS_8251(com->pc98_if_type)) return (com_tiocm_get(com)); else { #endif bitor = 0; if (com->mcr_image & MCR_DTR) bitor |= SER_DTR; if (com->mcr_image & MCR_RTS) bitor |= SER_RTS; msr = com->prev_modem_status; if (msr & MSR_CTS) bitor |= SER_CTS; if (msr & MSR_DCD) bitor |= SER_DCD; if (msr & MSR_DSR) bitor |= SER_DSR; if (msr & MSR_DSR) bitor |= SER_DSR; if (msr & (MSR_RI | MSR_TERI)) bitor |= SER_RI; return (bitor); #ifdef PC98 } #endif } } static void siosettimeout() { struct com_s *com; bool_t someopen; int unit; /* * Set our timeout period to 1 second if no polled devices are open. * Otherwise set it to max(1/200, 1/hz). * Enable timeouts iff some device is open. */ untimeout(comwakeup, (void *)NULL, sio_timeout_handle); sio_timeout = hz; someopen = FALSE; for (unit = 0; unit < sio_numunits; ++unit) { com = com_addr(unit); if (com != NULL && com->tp != NULL && com->tp->t_state & TS_ISOPEN && !com->gone) { someopen = TRUE; if (com->poll || com->poll_output) { sio_timeout = hz > 200 ? hz / 200 : 1; break; } } } if (someopen) { sio_timeouts_until_log = hz / sio_timeout; sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); } else { /* Flush error messages, if any. */ sio_timeouts_until_log = 1; comwakeup((void *)NULL); untimeout(comwakeup, (void *)NULL, sio_timeout_handle); } } static void comwakeup(chan) void *chan; { struct com_s *com; int unit; sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); /* * Recover from lost output interrupts. * Poll any lines that don't use interrupts. */ for (unit = 0; unit < sio_numunits; ++unit) { com = com_addr(unit); if (com != NULL && !com->gone && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { mtx_lock_spin(&sio_lock); siointr1(com); mtx_unlock_spin(&sio_lock); } } /* * Check for and log errors, but not too often. */ if (--sio_timeouts_until_log > 0) return; sio_timeouts_until_log = hz / sio_timeout; for (unit = 0; unit < sio_numunits; ++unit) { int errnum; com = com_addr(unit); if (com == NULL) continue; if (com->gone) continue; for (errnum = 0; errnum < CE_NTYPES; ++errnum) { u_int delta; u_long total; mtx_lock_spin(&sio_lock); delta = com->delta_error_counts[errnum]; com->delta_error_counts[errnum] = 0; mtx_unlock_spin(&sio_lock); if (delta == 0) continue; total = com->error_counts[errnum] += delta; log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", unit, delta, error_desc[errnum], delta == 1 ? "" : "s", total); } } } #ifdef PC98 /* commint is called when modem control line changes */ static void commint(struct cdev *dev) { register struct tty *tp; int stat,delta; struct com_s *com; com = dev->si_drv1; tp = com->tp; stat = com_tiocm_get(com); delta = com_tiocm_get_delta(com); if (com->state & CS_CTS_OFLOW) { if (stat & TIOCM_CTS) com->state |= CS_ODEVREADY; else com->state &= ~CS_ODEVREADY; } if ((delta & TIOCM_CAR) && (ISCALLOUT(dev)) == 0) { if (stat & TIOCM_CAR ) (void)ttyld_modem(tp, 1); else if (ttyld_modem(tp, 0) == 0) { /* negate DTR, RTS */ com_tiocm_bic(com, (tp->t_cflag & HUPCL) ? TIOCM_DTR|TIOCM_RTS|TIOCM_LE : TIOCM_LE ); /* disable IENABLE */ com_int_TxRx_disable( com ); } } } #endif /* * Following are all routines needed for SIO to act as console */ struct siocnstate { u_char dlbl; u_char dlbh; u_char ier; u_char cfcr; u_char mcr; }; /* * This is a function in order to not replicate "ttyd%d" more * places than absolutely necessary. */ static void siocnset(struct consdev *cd, int unit) { cd->cn_unit = unit; sprintf(cd->cn_name, "ttyd%d", unit); } static speed_t siocngetspeed(Port_t, u_long rclk); static void siocnclose(struct siocnstate *sp, Port_t iobase); static void siocnopen(struct siocnstate *sp, Port_t iobase, int speed); static void siocntxwait(Port_t iobase); static cn_probe_t sio_cnprobe; static cn_init_t sio_cninit; static cn_term_t sio_cnterm; static cn_getc_t sio_cngetc; static cn_putc_t sio_cnputc; static cn_grab_t sio_cngrab; static cn_ungrab_t sio_cnungrab; CONSOLE_DRIVER(sio); static void siocntxwait(iobase) Port_t iobase; { int timo; /* * Wait for any pending transmission to finish. Required to avoid * the UART lockup bug when the speed is changed, and for normal * transmits. */ timo = 100000; while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) != (LSR_TSRE | LSR_TXRDY) && --timo != 0) ; } /* * Read the serial port specified and try to figure out what speed * it's currently running at. We're assuming the serial port has * been initialized and is basicly idle. This routine is only intended * to be run at system startup. * * If the value read from the serial port doesn't make sense, return 0. */ static speed_t siocngetspeed(iobase, rclk) Port_t iobase; u_long rclk; { u_int divisor; u_char dlbh; u_char dlbl; u_char cfcr; cfcr = inb(iobase + com_cfcr); outb(iobase + com_cfcr, CFCR_DLAB | cfcr); dlbl = inb(iobase + com_dlbl); dlbh = inb(iobase + com_dlbh); outb(iobase + com_cfcr, cfcr); divisor = dlbh << 8 | dlbl; /* XXX there should be more sanity checking. */ if (divisor == 0) return (CONSPEED); return (rclk / (16UL * divisor)); } static void siocnopen(sp, iobase, speed) struct siocnstate *sp; Port_t iobase; int speed; { u_int divisor; u_char dlbh; u_char dlbl; /* * Save all the device control registers except the fifo register * and set our default ones (cs8 -parenb speed=comdefaultrate). * We can't save the fifo register since it is read-only. */ sp->ier = inb(iobase + com_ier); outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ siocntxwait(iobase); sp->cfcr = inb(iobase + com_cfcr); outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); sp->dlbl = inb(iobase + com_dlbl); sp->dlbh = inb(iobase + com_dlbh); /* * Only set the divisor registers if they would change, since on * some 16550 incompatibles (Startech), setting them clears the * data input register. This also reduces the effects of the * UMC8669F bug. */ divisor = siodivisor(comdefaultrclk, speed); dlbl = divisor & 0xFF; if (sp->dlbl != dlbl) outb(iobase + com_dlbl, dlbl); dlbh = divisor >> 8; if (sp->dlbh != dlbh) outb(iobase + com_dlbh, dlbh); outb(iobase + com_cfcr, CFCR_8BITS); sp->mcr = inb(iobase + com_mcr); /* * We don't want interrupts, but must be careful not to "disable" * them by clearing the MCR_IENABLE bit, since that might cause * an interrupt by floating the IRQ line. */ outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); } static void siocnclose(sp, iobase) struct siocnstate *sp; Port_t iobase; { /* * Restore the device control registers. */ siocntxwait(iobase); outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); if (sp->dlbl != inb(iobase + com_dlbl)) outb(iobase + com_dlbl, sp->dlbl); if (sp->dlbh != inb(iobase + com_dlbh)) outb(iobase + com_dlbh, sp->dlbh); outb(iobase + com_cfcr, sp->cfcr); /* * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. */ outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); outb(iobase + com_ier, sp->ier); } static void sio_cnprobe(cp) struct consdev *cp; { speed_t boot_speed; u_char cfcr; u_int divisor; int s, unit; struct siocnstate sp; /* * Find our first enabled console, if any. If it is a high-level * console device, then initialize it and return successfully. * If it is a low-level console device, then initialize it and * return unsuccessfully. It must be initialized in both cases * for early use by console drivers and debuggers. Initializing * the hardware is not necessary in all cases, since the i/o * routines initialize it on the fly, but it is necessary if * input might arrive while the hardware is switched back to an * uninitialized state. We can't handle multiple console devices * yet because our low-level routines don't take a device arg. * We trust the user to set the console flags properly so that we * don't need to probe. */ cp->cn_pri = CN_DEAD; for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ int flags; if (resource_disabled("sio", unit)) continue; if (resource_int_value("sio", unit, "flags", &flags)) continue; if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { int port; Port_t iobase; if (resource_int_value("sio", unit, "port", &port)) continue; iobase = port; s = spltty(); if ((boothowto & RB_SERIAL) && COM_CONSOLE(flags)) { boot_speed = siocngetspeed(iobase, comdefaultrclk); if (boot_speed) comdefaultrate = boot_speed; } /* * Initialize the divisor latch. We can't rely on * siocnopen() to do this the first time, since it * avoids writing to the latch if the latch appears * to have the correct value. Also, if we didn't * just read the speed from the hardware, then we * need to set the speed in hardware so that * switching it later is null. */ cfcr = inb(iobase + com_cfcr); outb(iobase + com_cfcr, CFCR_DLAB | cfcr); divisor = siodivisor(comdefaultrclk, comdefaultrate); outb(iobase + com_dlbl, divisor & 0xff); outb(iobase + com_dlbh, divisor >> 8); outb(iobase + com_cfcr, cfcr); siocnopen(&sp, iobase, comdefaultrate); splx(s); if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { siocnset(cp, unit); cp->cn_pri = COM_FORCECONSOLE(flags) || boothowto & RB_SERIAL ? CN_REMOTE : CN_NORMAL; siocniobase = iobase; siocnunit = unit; } #ifdef GDB if (COM_DEBUGGER(flags)) siogdbiobase = iobase; #endif } } } static void sio_cninit(cp) struct consdev *cp; { comconsole = cp->cn_unit; } static void sio_cnterm(cp) struct consdev *cp; { comconsole = -1; } static void sio_cngrab(struct consdev *cp) { } static void sio_cnungrab(struct consdev *cp) { } static int sio_cngetc(struct consdev *cd) { int c; Port_t iobase; int s; struct siocnstate sp; speed_t speed; if (cd != NULL && cd->cn_unit == siocnunit) { iobase = siocniobase; speed = comdefaultrate; } else { #ifdef GDB iobase = siogdbiobase; speed = gdbdefaultrate; #else return (-1); #endif } s = spltty(); siocnopen(&sp, iobase, speed); if (inb(iobase + com_lsr) & LSR_RXRDY) c = inb(iobase + com_data); else c = -1; siocnclose(&sp, iobase); splx(s); return (c); } static void sio_cnputc(struct consdev *cd, int c) { int need_unlock; int s; struct siocnstate sp; Port_t iobase; speed_t speed; if (cd != NULL && cd->cn_unit == siocnunit) { iobase = siocniobase; speed = comdefaultrate; } else { #ifdef GDB iobase = siogdbiobase; speed = gdbdefaultrate; #else return; #endif } s = spltty(); need_unlock = 0; if (!kdb_active && sio_inited == 2 && !mtx_owned(&sio_lock)) { mtx_lock_spin(&sio_lock); need_unlock = 1; } siocnopen(&sp, iobase, speed); siocntxwait(iobase); outb(iobase + com_data, c); siocnclose(&sp, iobase); if (need_unlock) mtx_unlock_spin(&sio_lock); splx(s); } /* * Remote gdb(1) support. */ #if defined(GDB) #include static gdb_probe_f siogdbprobe; static gdb_init_f siogdbinit; static gdb_term_f siogdbterm; static gdb_getc_f siogdbgetc; static gdb_putc_f siogdbputc; GDB_DBGPORT(sio, siogdbprobe, siogdbinit, siogdbterm, siogdbgetc, siogdbputc); static int siogdbprobe(void) { return ((siogdbiobase != 0) ? 0 : -1); } static void siogdbinit(void) { } static void siogdbterm(void) { } static void siogdbputc(int c) { sio_cnputc(NULL, c); } static int siogdbgetc(void) { return (sio_cngetc(NULL)); } #endif #ifdef PC98 /* * pc98 local function */ static void com_tiocm_bis(struct com_s *com, int msr) { int s; int tmp = 0; s=spltty(); com->pc98_prev_modem_status |= ( msr & (TIOCM_LE|TIOCM_DTR|TIOCM_RTS) ); tmp |= CMD8251_TxEN|CMD8251_RxEN; if ( msr & TIOCM_DTR ) tmp |= CMD8251_DTR; if ( msr & TIOCM_RTS ) tmp |= CMD8251_RTS; pc98_i8251_or_cmd( com, tmp ); splx(s); } static void com_tiocm_bic(struct com_s *com, int msr) { int s; int tmp = msr; s=spltty(); com->pc98_prev_modem_status &= ~( msr & (TIOCM_LE|TIOCM_DTR|TIOCM_RTS) ); if ( msr & TIOCM_DTR ) tmp |= CMD8251_DTR; if ( msr & TIOCM_RTS ) tmp |= CMD8251_RTS; pc98_i8251_clear_cmd( com, tmp ); splx(s); } static int com_tiocm_get(struct com_s *com) { return( com->pc98_prev_modem_status ); } static int com_tiocm_get_delta(struct com_s *com) { int tmp; tmp = com->pc98_modem_delta; com->pc98_modem_delta = 0; return( tmp ); } /* convert to TIOCM_?? ( ioctl.h ) */ static int pc98_get_modem_status(struct com_s *com) { register int msr; msr = com->pc98_prev_modem_status & ~(TIOCM_CAR|TIOCM_RI|TIOCM_DSR|TIOCM_CTS); if (com->pc98_8251fifo_enable) { int stat2; stat2 = inb(I8251F_msr); if ( stat2 & MSR_DCD ) msr |= TIOCM_CAR; if ( stat2 & MSR_RI ) msr |= TIOCM_RI; if ( stat2 & MSR_DSR ) msr |= TIOCM_DSR; if ( stat2 & MSR_CTS ) msr |= TIOCM_CTS; #if COM_CARRIER_DETECT_EMULATE if ( msr & (TIOCM_DSR|TIOCM_CTS) ) { msr |= TIOCM_CAR; } #endif } else { int stat, stat2; stat = inb(com->sts_port); stat2 = inb(com->in_modem_port); if ( !(stat2 & CICSCD_CD) ) msr |= TIOCM_CAR; if ( !(stat2 & CICSCD_CI) ) msr |= TIOCM_RI; if ( stat & STS8251_DSR ) msr |= TIOCM_DSR; if ( !(stat2 & CICSCD_CS) ) msr |= TIOCM_CTS; #if COM_CARRIER_DETECT_EMULATE if ( msr & (TIOCM_DSR|TIOCM_CTS) ) { msr |= TIOCM_CAR; } #endif } return(msr); } static void pc98_check_msr(void* chan) { int msr, delta; int s; register struct tty *tp; struct com_s *com; struct cdev *dev; dev=(struct cdev *)chan; com = dev->si_drv1; tp = dev->si_tty; s = spltty(); msr = pc98_get_modem_status(com); /* make change flag */ delta = msr ^ com->pc98_prev_modem_status; if ( delta & TIOCM_CAR ) { if ( com->modem_car_chg_timer ) { if ( -- com->modem_car_chg_timer ) msr ^= TIOCM_CAR; } else { if ((com->modem_car_chg_timer = (msr & TIOCM_CAR) ? DCD_ON_RECOGNITION : DCD_OFF_TOLERANCE) != 0) msr ^= TIOCM_CAR; } } else com->modem_car_chg_timer = 0; delta = ( msr ^ com->pc98_prev_modem_status ) & (TIOCM_CAR|TIOCM_RI|TIOCM_DSR|TIOCM_CTS); com->pc98_prev_modem_status = msr; delta = ( com->pc98_modem_delta |= delta ); splx(s); if ( com->modem_checking || (tp->t_state & (TS_ISOPEN)) ) { if ( delta ) { commint(dev); } timeout(pc98_check_msr, (caddr_t)dev, PC98_CHECK_MODEM_INTERVAL); } else { com->modem_checking = 0; } } static void pc98_msrint_start(struct cdev *dev) { struct com_s *com; int s = spltty(); com = dev->si_drv1; /* modem control line check routine envoke interval is 1/10 sec */ if ( com->modem_checking == 0 ) { com->pc98_prev_modem_status = pc98_get_modem_status(com); com->pc98_modem_delta = 0; timeout(pc98_check_msr, (caddr_t)dev, PC98_CHECK_MODEM_INTERVAL); com->modem_checking = 1; } splx(s); } static void pc98_disable_i8251_interrupt(struct com_s *com, int mod) { /* disable interrupt */ register int tmp; mod |= ~(IEN_Tx|IEN_TxEMP|IEN_Rx); COM_INT_DISABLE tmp = inb( com->intr_ctrl_port ) & ~(IEN_Tx|IEN_TxEMP|IEN_Rx); outb( com->intr_ctrl_port, (com->intr_enable&=~mod) | tmp ); COM_INT_ENABLE } static void pc98_enable_i8251_interrupt(struct com_s *com, int mod) { register int tmp; COM_INT_DISABLE tmp = inb( com->intr_ctrl_port ) & ~(IEN_Tx|IEN_TxEMP|IEN_Rx); outb( com->intr_ctrl_port, (com->intr_enable|=mod) | tmp ); COM_INT_ENABLE } static int pc98_check_i8251_interrupt(struct com_s *com) { return ( com->intr_enable & 0x07 ); } static void pc98_i8251_clear_cmd(struct com_s *com, int x) { int tmp; COM_INT_DISABLE tmp = com->pc98_prev_siocmd & ~(x); if (com->pc98_8251fifo_enable) outb(I8251F_fcr, 0); outb(com->cmd_port, tmp); com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH); if (com->pc98_8251fifo_enable) outb(I8251F_fcr, FIFO_ENABLE); COM_INT_ENABLE } static void pc98_i8251_or_cmd(struct com_s *com, int x) { int tmp; COM_INT_DISABLE if (com->pc98_8251fifo_enable) outb(I8251F_fcr, 0); tmp = com->pc98_prev_siocmd | (x); outb(com->cmd_port, tmp); com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH); if (com->pc98_8251fifo_enable) outb(I8251F_fcr, FIFO_ENABLE); COM_INT_ENABLE } static void pc98_i8251_set_cmd(struct com_s *com, int x) { int tmp; COM_INT_DISABLE if (com->pc98_8251fifo_enable) outb(I8251F_fcr, 0); tmp = (x); outb(com->cmd_port, tmp); com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH); if (com->pc98_8251fifo_enable) outb(I8251F_fcr, FIFO_ENABLE); COM_INT_ENABLE } static void pc98_i8251_clear_or_cmd(struct com_s *com, int clr, int x) { int tmp; COM_INT_DISABLE if (com->pc98_8251fifo_enable) outb(I8251F_fcr, 0); tmp = com->pc98_prev_siocmd & ~(clr); tmp |= (x); outb(com->cmd_port, tmp); com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH); if (com->pc98_8251fifo_enable) outb(I8251F_fcr, FIFO_ENABLE); COM_INT_ENABLE } static int pc98_i8251_get_cmd(struct com_s *com) { return com->pc98_prev_siocmd; } static int pc98_i8251_get_mod(struct com_s *com) { return com->pc98_prev_siomod; } static void pc98_i8251_reset(struct com_s *com, int mode, int command) { if (com->pc98_8251fifo_enable) outb(I8251F_fcr, 0); outb(com->cmd_port, 0); /* dummy */ DELAY(2); outb(com->cmd_port, 0); /* dummy */ DELAY(2); outb(com->cmd_port, 0); /* dummy */ DELAY(2); outb(com->cmd_port, CMD8251_RESET); /* internal reset */ DELAY(2); outb(com->cmd_port, mode ); /* mode register */ com->pc98_prev_siomod = mode; DELAY(2); pc98_i8251_set_cmd( com, (command|CMD8251_ER) ); DELAY(10); if (com->pc98_8251fifo_enable) outb(I8251F_fcr, FIFO_ENABLE | FIFO_XMT_RST | FIFO_RCV_RST); } static void pc98_check_sysclock(void) { /* get system clock from port */ if ( pc98_machine_type & M_8M ) { /* 8 MHz system & H98 */ sysclock = 8; } else { /* 5 MHz system */ sysclock = 5; } } static void com_cflag_and_speed_set( struct com_s *com, int cflag, int speed) { int cfcr=0; int previnterrupt; int tmp; u_int count; if (pc98_ttspeedtab(com, speed, &count) != 0) return; previnterrupt = pc98_check_i8251_interrupt(com); pc98_disable_i8251_interrupt( com, IEN_Tx|IEN_TxEMP|IEN_Rx ); switch ( cflag&CSIZE ) { case CS5: cfcr = MOD8251_5BITS; break; case CS6: cfcr = MOD8251_6BITS; break; case CS7: cfcr = MOD8251_7BITS; break; case CS8: cfcr = MOD8251_8BITS; break; } if ( cflag&PARENB ) { if ( cflag&PARODD ) cfcr |= MOD8251_PENAB; else cfcr |= MOD8251_PENAB | MOD8251_PEVEN; } if ( cflag&CSTOPB ) cfcr |= MOD8251_STOP2; else cfcr |= MOD8251_STOP1; if ( count & 0x10000 ) cfcr |= MOD8251_CLKx1; else cfcr |= MOD8251_CLKx16; while (!((tmp = inb(com->sts_port)) & STS8251_TxEMP)) ; /* set baud rate from ospeed */ pc98_set_baud_rate( com, count ); if ( cfcr != pc98_i8251_get_mod(com) ) pc98_i8251_reset(com, cfcr, pc98_i8251_get_cmd(com) ); pc98_enable_i8251_interrupt( com, previnterrupt ); } static int pc98_ttspeedtab(struct com_s *com, int speed, u_int *divisor) { int if_type, effect_sp, count = -1, mod; if_type = com->pc98_if_type & 0x0f; switch (com->pc98_if_type) { case COM_IF_INTERNAL: if (PC98SIO_baud_rate_port(if_type) != -1) { count = ttspeedtab(speed, if_8251_type[if_type].speedtab); if (count > 0) { count |= COM1_EXT_CLOCK; break; } } /* for *1CLK asynchronous! mode, TEFUTEFU */ mod = (sysclock == 5) ? 2457600 : 1996800; effect_sp = ttspeedtab( speed, pc98speedtab ); if ( effect_sp < 0 ) /* XXX */ effect_sp = ttspeedtab( (speed - 1), pc98speedtab ); if ( effect_sp <= 0 ) return effect_sp; if ( effect_sp == speed ) mod /= 16; if ( mod % effect_sp ) return(-1); count = mod / effect_sp; if ( count > 65535 ) return(-1); if ( effect_sp != speed ) count |= 0x10000; break; case COM_IF_PC9861K_1: case COM_IF_PC9861K_2: count = 1; break; case COM_IF_IND_SS_1: case COM_IF_IND_SS_2: case COM_IF_PIO9032B_1: case COM_IF_PIO9032B_2: count = ttspeedtab( speed, if_8251_type[if_type].speedtab ); break; case COM_IF_B98_01_1: case COM_IF_B98_01_2: count = ttspeedtab( speed, if_8251_type[if_type].speedtab ); #ifdef B98_01_OLD if (count == 0 || count == 1) { count += 4; count |= 0x20000; /* x1 mode for 76800 and 153600 */ } #endif break; } if (count < 0) return count; *divisor = (u_int) count; return 0; } static void pc98_set_baud_rate( struct com_s *com, u_int count ) { int if_type, io, s; if_type = com->pc98_if_type & 0x0f; io = rman_get_start(com->ioportres) & 0xff00; switch (com->pc98_if_type) { case COM_IF_INTERNAL: if (PC98SIO_baud_rate_port(if_type) != -1) { if (count & COM1_EXT_CLOCK) { outb((Port_t)PC98SIO_baud_rate_port(if_type), count & 0xff); break; } else { outb((Port_t)PC98SIO_baud_rate_port(if_type), 0x09); } } if (count == 0) return; /* set i8253 */ s = splclock(); if (count != 3) outb( 0x77, 0xb6 ); else outb( 0x77, 0xb4 ); outb( 0x5f, 0); outb( 0x75, count & 0xff ); outb( 0x5f, 0); outb( 0x75, (count >> 8) & 0xff ); splx(s); break; case COM_IF_IND_SS_1: case COM_IF_IND_SS_2: outb(io | PC98SIO_intr_ctrl_port(if_type), 0); outb(io | PC98SIO_baud_rate_port(if_type), 0); outb(io | PC98SIO_baud_rate_port(if_type), 0xc0); outb(io | PC98SIO_baud_rate_port(if_type), (count >> 8) | 0x80); outb(io | PC98SIO_baud_rate_port(if_type), count & 0xff); break; case COM_IF_PIO9032B_1: case COM_IF_PIO9032B_2: outb(io | PC98SIO_baud_rate_port(if_type), count); break; case COM_IF_B98_01_1: case COM_IF_B98_01_2: outb(io | PC98SIO_baud_rate_port(if_type), count & 0x0f); #ifdef B98_01_OLD /* * Some old B98_01 board should be controlled * in different way, but this hasn't been tested yet. */ outb(io | PC98SIO_func_port(if_type), (count & 0x20000) ? 0xf0 : 0xf2); #endif break; } } static int pc98_check_if_type(device_t dev, struct siodev *iod) { int irr, io, if_type, tmp; static short irq_tab[2][8] = { { 3, 5, 6, 9, 10, 12, 13, -1}, { 3, 10, 12, 13, 5, 6, 9, -1} }; if_type = iod->if_type & 0x0f; iod->irq = 0; io = isa_get_port(dev) & 0xff00; if (IS_8251(iod->if_type)) { if (PC98SIO_func_port(if_type) != -1) { outb(io | PC98SIO_func_port(if_type), 0xf2); tmp = ttspeedtab(9600, if_8251_type[if_type].speedtab); if (tmp != -1 && PC98SIO_baud_rate_port(if_type) != -1) outb(io | PC98SIO_baud_rate_port(if_type), tmp); } iod->cmd = io | PC98SIO_cmd_port(if_type); iod->sts = io | PC98SIO_sts_port(if_type); iod->mod = io | PC98SIO_in_modem_port(if_type); iod->ctrl = io | PC98SIO_intr_ctrl_port(if_type); if (iod->if_type == COM_IF_INTERNAL) { iod->irq = 4; if (pc98_check_8251vfast()) { PC98SIO_baud_rate_port(if_type) = I8251F_div; if_8251_type[if_type].speedtab = pc98fast_speedtab; } } else { tmp = inb( iod->mod ) & if_8251_type[if_type].irr_mask; if ((isa_get_port(dev) & 0xff) == IO_COM2) iod->irq = irq_tab[0][tmp]; else iod->irq = irq_tab[1][tmp]; } } else { irr = if_16550a_type[if_type].irr_read; #ifdef COM_MULTIPORT if (!COM_ISMULTIPORT(device_get_flags(dev)) || device_get_unit(dev) == COM_MPMASTER(device_get_flags(dev))) #endif if (irr != -1) { tmp = inb(io | irr); if (isa_get_port(dev) & 0x01) /* XXX depend on RSB-384 */ iod->irq = irq_tab[1][tmp >> 3]; else iod->irq = irq_tab[0][tmp & 0x07]; } iod->cmd = 0; iod->sts = 0; iod->mod = 0; iod->ctrl = 0; } if ( iod->irq == -1 ) return -1; return 0; } static void pc98_set_ioport(struct com_s *com) { int if_type = com->pc98_if_type & 0x0f; Port_t io = rman_get_start(com->ioportres) & 0xff00; pc98_check_sysclock(); com->data_port = io | PC98SIO_data_port(if_type); com->cmd_port = io | PC98SIO_cmd_port(if_type); com->sts_port = io | PC98SIO_sts_port(if_type); com->in_modem_port = io | PC98SIO_in_modem_port(if_type); com->intr_ctrl_port = io | PC98SIO_intr_ctrl_port(if_type); } static int pc98_check_8251vfast(void) { int i; outb(I8251F_div, 0x8c); DELAY(10); for (i = 0; i < 100; i++) { if ((inb(I8251F_div) & 0x80) != 0) { i = 0; break; } DELAY(1); } outb(I8251F_div, 0); DELAY(10); for (; i < 100; i++) { if ((inb(I8251F_div) & 0x80) == 0) return 1; DELAY(1); } return 0; } static int pc98_check_8251fifo(void) { u_char tmp1, tmp2; tmp1 = inb(I8251F_iir); DELAY(10); tmp2 = inb(I8251F_iir); if (((tmp1 ^ tmp2) & 0x40) != 0 && ((tmp1 | tmp2) & 0x20) == 0) return 1; return 0; } #endif /* PC98 defined */