diff options
Diffstat (limited to 'sys/dev/sx/sx_util.c')
| -rw-r--r-- | sys/dev/sx/sx_util.c | 260 |
1 files changed, 0 insertions, 260 deletions
diff --git a/sys/dev/sx/sx_util.c b/sys/dev/sx/sx_util.c deleted file mode 100644 index 0eeb8aeb7549..000000000000 --- a/sys/dev/sx/sx_util.c +++ /dev/null @@ -1,260 +0,0 @@ -/*- - * Device driver for Specialix I/O8+ multiport serial card. - * - * Copyright 2003 Frank Mayhar <frank@exit.com> - * - * Derived from the "si" driver by Peter Wemm <peter@netplex.com.au>, using - * lots of information from the Linux "specialix" driver by Roger Wolff - * <R.E.Wolff@BitWizard.nl> and from the Intel CD1865 "Intelligent Eight- - * Channel Communications Controller" datasheet. Roger was also nice - * enough to answer numerous questions about stuff specific to the I/O8+ - * not covered by the CD1865 datasheet. - * - * 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 - * notices, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notices, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY ``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 AUTHORS BE LIABLE. - * - * $FreeBSD$ - */ - -#include "opt_debug_sx.h" - -/* Utility and support routines for the Specialix I/O8+ driver. */ - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/bus.h> -#include <sys/tty.h> -#include <machine/resource.h> -#include <machine/bus.h> -#include <machine/clock.h> -#include <sys/rman.h> - -#include <dev/sx/cd1865.h> -#include <dev/sx/sxvar.h> -#include <dev/sx/sx.h> -#include <dev/sx/sx_util.h> - -/* - * sx_probe_io8() - * Probe the board to verify that it is a Specialix I/O8+. - * - * Description: - * This is called by sx_pci_attach() (and possibly in the future by - * sx_isa_attach()) to verify that the card we're attaching to is - * indeed a Specialix I/O8+. To do this, we check for the Prescaler - * Period Register of the CD1865 chip and for the Specialix signature - * on the DSR input line of each channel. These lines, along with the - * RTS output lines, are wired down in hardware. - */ -int -sx_probe_io8( - device_t dev) -{ - struct sx_softc *sc; - unsigned char val1, val2; - int i; - - sc = device_get_softc(dev); - /* - * Try to write the Prescaler Period Register, then read it back, - * twice. If this fails, it's not an I/O8+. - */ - sx_cd1865_out(sc, CD1865_PPRL, 0x5a); - DELAY(1); - val1 = sx_cd1865_in(sc, CD1865_PPRL); - - sx_cd1865_out(sc, CD1865_PPRL, 0xa5); - DELAY(1); - val2 = sx_cd1865_in(sc, CD1865_PPRL); - - if ((val1 != 0x5a) || (val2 != 0xa5)) - return(1); - - /* - * Check the lines that Specialix uses as board identification. - * These are the DSR input and the RTS output, which are wired - * down. - */ - val1 = 0; - for (i = 0; i < 8; i++) { - sx_cd1865_out(sc, CD1865_CAR, i); /* Select channel. */ - if (sx_cd1865_in(sc, CD1865_MSVR) & CD1865_MSVR_DSR) /* Set? */ - val1 |= 1 << i; /* OR it in. */ - } -#ifdef notdef - val2 = 0; - for (i = 0; i < 8; i++) { - sx_cd1865_out(sc, CD1865_CAR, i); /* Select channel. */ - if (sx_cd1865_in(sc, CD1865_MSVR) & CD1865_MSVR_RTS) /* Set? */ - val2 |= 1 << i; /* OR it in. */ - } - /* - * They managed to switch the bit order between the docs and - * the IO8+ card. The new PCI card now conforms to old docs. - * They changed the PCI docs to reflect the situation on the - * old card. - */ - val2 = (bp->flags & SX_BOARD_IS_PCI) ? 0x4d : 0xb2; -#endif /* notdef */ - if (val1 != 0x4d) { - if (bootverbose) - device_printf(dev, - "Specialix I/O8+ ID 0x4d not found (0x%02x).\n", - val1); - return(1); - } - return(0); /* Probed successfully. */ -} - -/* - * sx_init_CD1865() - * Hard-reset and initialize the I/O8+ CD1865 processor. - * - * Description: - * This routine does a hard reset of the CD1865 chip and waits for it - * to complete. (The reset should complete after 500us; we wait 1ms - * and fail if we time out.) We then initialize the CD1865 processor. - */ -int -sx_init_cd1865( - struct sx_softc *sc, - int unit) -{ - int s; - unsigned int to; - - s = spltty(); - disable_intr(); - sx_cd1865_out(sc, CD1865_GSVR, 0x00); /* Clear the GSVR. */ - sx_cd1865_wait_CCR(sc, 0); /* Wait for the CCR to clear. */ - sx_cd1865_out(sc, CD1865_CCR, CD1865_CCR_HARDRESET); /* Reset CD1865. */ - enable_intr(); - to = SX_GSVR_TIMEOUT/5; - while (to-- > 0) { - if (sx_cd1865_in(sc, CD1865_GSVR) == 0xff) - break; - DELAY(5); - } - if (to == 0) { - splx(s); - printf("sx%d: Timeout waiting for reset.\n", unit); - return(EIO); - } - /* - * The high five bits of the Global Interrupt Vector Register is - * used to identify daisy-chained CD1865 chips. The I/O8+ isn't - * daisy chained, but we have to initialize the field anyway. - */ - sx_cd1865_out(sc, CD1865_GIVR, SX_CD1865_ID); - /* Clear the Global Interrupting Channel register. */ - sx_cd1865_out(sc, CD1865_GICR, 0); - /* - * Set the Service Match Registers to the appropriate values. See - * the cd1865.h include file for more information. - */ - sx_cd1865_out(sc, CD1865_MSMR, CD1865_ACK_MINT); /* Modem. */ - sx_cd1865_out(sc, CD1865_TSMR, CD1865_ACK_TINT); /* Transmit. */ - sx_cd1865_out(sc, CD1865_RSMR, CD1865_ACK_RINT); /* Receive. */ - /* - * Set RegAckEn in the Service Request Configuration Register; - * we'll be acknowledging service requests in software, not - * hardware. - */ - sx_cd1865_bis(sc, CD1865_SRCR, CD1865_SRCR_REGACKEN); - /* - * Set the CD1865 timer tick rate. The value here is the processor - * clock rate (in MHz) divided by the rate in ticks per second. See - * commentary in sx.h. - */ - sx_cd1865_out(sc, CD1865_PPRH, SX_CD1865_PRESCALE >> 8); - sx_cd1865_out(sc, CD1865_PPRL, SX_CD1865_PRESCALE & 0xff); - - splx(s); - return(0); -} - -#ifdef notyet -/* - * Set the IRQ using the RTS lines that run to the PAL on the board.... - * - * This is a placeholder for ISA support, if that's ever implemented. This - * should _only_ be called from sx_isa_attach(). - */ -int -sx_set_irq( - struct sx_softc *sc, - int unit, - int irq) -{ - register int virq; - register int i, j; - - switch (irq) { - /* In the same order as in the docs... */ - case 15: - virq = 0; - break; - case 12: - virq = 1; - break; - case 11: - virq = 2; - break; - case 9: - virq = 3; - break; - default: - printf("sx%d: Illegal irq %d.\n", unit, irq); - return(0); - } - for (i = 0; i < 2; i++) { - sx_cd1865_out(sc, CD1865_CAR, i); /* Select channel. */ - j = ((virq >> i) & 0x1) ? MSVR_RTS : 0; - sx_cd1865_out(sc, CD1865_MSVRTS, j); - } - return(1); -} - -#endif /* notyet */ - -/* - * sx_int_port() - * Determine the port that interrupted us. - * - * Description: - * This routine checks the Global Interrupting Channel Register (GICR) - * to find the port that caused an interrupt. It returns a pointer to - * the sx_port structure of the interrupting port, or NULL if there was - * none. - * - * XXX - check type/validity of interrupt? - */ -struct sx_port * -sx_int_port( - struct sx_softc *sc, - int unit) -{ - unsigned char chan; - struct sx_port *pp; - - chan = (sx_cd1865_in(sc, CD1865_GSCR2|SX_EI) & CD1865_GICR_CHAN_MASK) - >> CD1865_GICR_CHAN_SHIFT; - DPRINT((NULL, DBG_INTR, "Intr chan %d\n", chan)); - if (chan < CD1865_NUMCHAN) { - pp = sc->sc_ports + (int)chan; - return(pp); - } - printf("sx%d: False interrupt on port %d.\n", unit, chan); - return(NULL); -} |