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Annotation of sys/arch/i386/pci/rccosb4.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: rccosb4.c,v 1.4 2005/11/23 09:24:57 mickey Exp $      */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 2004,2005 Michael Shalayeff
        !             5:  * All rights reserved.
        !             6:  *
        !             7:  * Redistribution and use in source and binary forms, with or without
        !             8:  * modification, are permitted provided that the following conditions
        !             9:  * are met:
        !            10:  * 1. Redistributions of source code must retain the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer.
        !            12:  * 2. Redistributions in binary form must reproduce the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer in the
        !            14:  *    documentation and/or other materials provided with the distribution.
        !            15:  *
        !            16:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
        !            17:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        !            18:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        !            19:  * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
        !            20:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
        !            21:  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
        !            22:  * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            23:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
        !            24:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
        !            25:  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
        !            26:  * THE POSSIBILITY OF SUCH DAMAGE.
        !            27:  */
        !            28:
        !            29: /*
        !            30:  * Support for RCC South Bridge interrupt controller
        !            31:  */
        !            32:
        !            33: #include <sys/param.h>
        !            34: #include <sys/systm.h>
        !            35: #include <sys/device.h>
        !            36: #include <sys/malloc.h>
        !            37:
        !            38: #include <machine/intr.h>
        !            39: #include <machine/bus.h>
        !            40:
        !            41: #include <dev/pci/pcivar.h>
        !            42: #include <dev/pci/pcireg.h>
        !            43:
        !            44: #include <i386/pci/pcibiosvar.h>
        !            45: #include <i386/pci/piixvar.h>
        !            46: #include <i386/pci/rccosb4reg.h>
        !            47:
        !            48: struct osb4_handle {
        !            49:        struct piix_handle piix;
        !            50:
        !            51: #define        osb4_iot        piix.ph_iot
        !            52:        bus_space_handle_t osb4_ioh;
        !            53: };
        !            54:
        !            55: int    osb4_getclink(pciintr_icu_handle_t, int, int *);
        !            56: int    osb4_get_intr(pciintr_icu_handle_t, int, int *);
        !            57: int    osb4_set_intr(pciintr_icu_handle_t, int, int);
        !            58:
        !            59: const struct pciintr_icu osb4_pci_icu = {
        !            60:        osb4_getclink,
        !            61:        osb4_get_intr,
        !            62:        osb4_set_intr,
        !            63:        piix_get_trigger,
        !            64:        piix_set_trigger,
        !            65: };
        !            66:
        !            67: int
        !            68: osb4_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag,
        !            69:     pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp)
        !            70: {
        !            71:        struct osb4_handle *ph;
        !            72:
        !            73:        ph = malloc(sizeof(*ph), M_DEVBUF, M_NOWAIT);
        !            74:        if (ph == NULL)
        !            75:                return (1);
        !            76:
        !            77:        ph->piix.ph_iot = iot;
        !            78:        ph->piix.ph_pc = pc;
        !            79:        ph->piix.ph_tag = tag;
        !            80:
        !            81:        if (bus_space_map(iot, OSB4_PIAIR, 2, 0, &ph->osb4_ioh)) {
        !            82:                free(ph, M_DEVBUF);
        !            83:                return (1);
        !            84:        }
        !            85:
        !            86:        if (bus_space_map(iot, OSB4_REG_ELCR, 2, 0, &ph->piix.ph_elcr_ioh)) {
        !            87:                free(ph, M_DEVBUF);
        !            88:                return (1);
        !            89:        }
        !            90:
        !            91:        *ptagp = &osb4_pci_icu;
        !            92:        *phandp = ph;
        !            93:        return (0);
        !            94: }
        !            95:
        !            96: int
        !            97: osb4_getclink(pciintr_icu_handle_t v, int link, int *clinkp)
        !            98: {
        !            99:        if (OSB4_LEGAL_LINK(link - 1)) {
        !           100:                *clinkp = link;
        !           101:                if (link <= OSB4_PISP)
        !           102:                        *clinkp |= PCI_INT_VIA_ISA;
        !           103:                return (0);
        !           104:        }
        !           105:
        !           106:        return (1);
        !           107: }
        !           108:
        !           109: int
        !           110: osb4_get_intr(pciintr_icu_handle_t v, int clink, int *irqp)
        !           111: {
        !           112:        struct osb4_handle *ph = v;
        !           113:        int link = clink & 0xff;
        !           114:
        !           115:        if (!OSB4_LEGAL_LINK(link))
        !           116:                return (1);
        !           117:
        !           118:        bus_space_write_1(ph->osb4_iot, ph->osb4_ioh, 0, link);
        !           119:        *irqp = bus_space_read_1(ph->osb4_iot, ph->osb4_ioh, 1) & 0xf;
        !           120:        if (*irqp == 0)
        !           121:                *irqp = I386_PCI_INTERRUPT_LINE_NO_CONNECTION;
        !           122:
        !           123:        return (0);
        !           124: }
        !           125:
        !           126: int
        !           127: osb4_set_intr(pciintr_icu_handle_t v, int clink, int irq)
        !           128: {
        !           129:        struct osb4_handle *ph = v;
        !           130:        int link = clink & 0xff;
        !           131:
        !           132:        if (!OSB4_LEGAL_LINK(link) || !OSB4_LEGAL_IRQ(irq & 0xf))
        !           133:                return (1);
        !           134:
        !           135:        bus_space_write_1(ph->osb4_iot, ph->osb4_ioh, 0, link);
        !           136:        bus_space_write_1(ph->osb4_iot, ph->osb4_ioh, 1, irq & 0xf);
        !           137:
        !           138:        return (0);
        !           139: }