sys/arch/i386/pci/ali1543.c

   1 /*      $NetBSD: ali1543.c,v 1.10 2008/04/28 20:23:24 martin Exp $      */
   2
   3 /*
   4  * Copyright (c) 2001
   5  *       HAYAKAWA Koichi.  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
  18  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  19  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR 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 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 IN
  25  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /*-
  30  * Copyright (c) 1999 The NetBSD Foundation, Inc.
  31  * All rights reserved.
  32  *
  33  * This code is derived from software contributed to The NetBSD Foundation
  34  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
  35  * NASA Ames Research Center.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  * 1. Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  * 2. Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in the
  44  *    documentation and/or other materials provided with the distribution.
  45  *
  46  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  47  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  48  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  49  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  50  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  51  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  52  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  53  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  54  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  55  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  56  * POSSIBILITY OF SUCH DAMAGE.
  57  */
  58
  59 /*
  60  * Copyright (c) 1999, by UCHIYAMA Yasushi
  61  * All rights reserved.
  62  *
  63  * Redistribution and use in source and binary forms, with or without
  64  * modification, are permitted provided that the following conditions
  65  * are met:
  66  * 1. Redistributions of source code must retain the above copyright
  67  *    notice, this list of conditions and the following disclaimer.
  68  * 2. The name of the developer may NOT be used to endorse or promote products
  69  *    derived from this software without specific prior written permission.
  70  *
  71  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  72  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  73  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  74  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  75  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  76  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  77  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  78  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  79  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  80  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  81  * SUCH DAMAGE.
  82  */
  83
  84 /* HAYAKAWA Koichi wrote ALi 1543 PCI ICU code basing on VIA82C586 driver */
  85
  86 #include <sys/cdefs.h>
  87 __KERNEL_RCSID(0, "$NetBSD: ali1543.c,v 1.10 2008/04/28 20:23:24 martin Exp $");
  88
  89 #include <sys/param.h>
  90 #include <sys/systm.h>
  91 #include <sys/errno.h>
  92 #include <sys/device.h>
  93 #include <sys/malloc.h>
  94 #include <sys/proc.h>
  95
  96 #include <machine/intr.h>
  97 #include <machine/bus.h>
  98
  99 #include <dev/pci/pcivar.h>
 100 #include <dev/pci/pcireg.h>
 101 #include <dev/pci/pcidevs.h>
 102
 103 #include <i386/pci/pci_intr_fixup.h>
 104 #include <i386/pci/piixvar.h>
 105
 106
 107 int ali1543_getclink(pciintr_icu_handle_t, int, int *);
 108 int ali1543_get_intr(pciintr_icu_handle_t, int, int *);
 109 int ali1543_set_intr(pciintr_icu_handle_t, int, int);
 110
 111
 112 const struct pciintr_icu ali1543_icu = {
 113         ali1543_getclink,
 114         ali1543_get_intr,
 115         ali1543_set_intr,
 116         piix_get_trigger,
 117         piix_set_trigger,
 118 };
 119
 120
 121 /*
 122  * Linux source code (linux/arch/i386/kernel/pci-irq.c) says that the
 123  * irq order of ALi PCI ICU is shuffled.
 124  */
 125 static const int ali1543_intr_shuffle_get[16] = {
 126         0, 9, 3, 10, 4, 5, 7, 6, 1, 11, 0, 12, 0, 14, 0, 15
 127 };
 128 static const int ali1543_intr_shuffle_set[16] = {
 129         0, 8, 0, 2, 4, 5, 7, 6, 0, 1, 3, 9, 11, 0, 13, 15
 130 };
 131
 132 #define ALI1543_IRQ_MASK                0xdefa
 133
 134 #define ALI1543_LEGAL_LINK(link)        (((link) >= 0) && ((link) <= 7))
 135 #define ALI1543_LEGAL_IRQ(irq)          ((1 << (irq)) & ALI1543_IRQ_MASK)
 136
 137 #define ALI1543_INTR_CFG_REG            0x48
 138
 139 #define ALI1543_INTR_PIRQA_SHIFT        0
 140 #define ALI1543_INTR_PIRQA_MASK         0x0000000f
 141 #define ALI1543_INTR_PIRQB_SHIFT        4
 142 #define ALI1543_INTR_PIRQB_MASK         0x000000f0
 143 #define ALI1543_INTR_PIRQC_SHIFT        8
 144 #define ALI1543_INTR_PIRQC_MASK         0x00000f00
 145 #define ALI1543_INTR_PIRQD_SHIFT        12
 146 #define ALI1543_INTR_PIRQD_MASK         0x0000f000
 147
 148 #define ALI1543_INTR_PIRQ_SHIFT(clink)  ((clink)*4)
 149 #define ALI1543_INTR_PIRQ_IRQ(reg, clink)                               \
 150         (((reg) >> ((clink)*4)) & 0x0f)
 151 #define ALI1543_PIRQ(reg, clink)                                        \
 152         ali1543_intr_shuffle_get[ALI1543_INTR_PIRQ_IRQ((reg), (clink))]
 153
 154
 155 int
 156 ali1543_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag,
 157     pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp)
 158 {
 159
 160         if (piix_init(pc, iot, tag, ptagp, phandp) == 0) {
 161                 *ptagp = &ali1543_icu;
 162
 163                 return (0);
 164         }
 165
 166         return (1);
 167 }
 168
 169 int
 170 ali1543_getclink(pciintr_icu_handle_t v, int link, int *clinkp)
 171 {
 172
 173         if (ALI1543_LEGAL_LINK(link - 1)) {
 174                 *clinkp = link - 1;
 175                 return (0);
 176         }
 177
 178         return (1);
 179 }
 180
 181 int
 182 ali1543_get_intr(pciintr_icu_handle_t v, int clink, int *irqp)
 183 {
 184         struct piix_handle *ph = v;
 185         pcireg_t reg;
 186         int val;
 187
 188         if (ALI1543_LEGAL_LINK(clink) == 0)
 189                 return (1);
 190
 191         reg = pci_conf_read(ph->ph_pc, ph->ph_tag, ALI1543_INTR_CFG_REG);
 192 #ifdef DEBUG_1543
 193         printf("ali1543: PIRQ reg 0x%08x\n", reg); /* XXX debug */
 194 #endif /* DEBUG_1543 */
 195         val = ALI1543_PIRQ(reg, clink);
 196         *irqp = (val == 0) ?
 197             X86_PCI_INTERRUPT_LINE_NO_CONNECTION : val;
 198
 199         return (0);
 200 }
 201
 202 int
 203 ali1543_set_intr(pciintr_icu_handle_t v, int clink, int irq)
 204 {
 205         struct piix_handle *ph = v;
 206         int shift, val;
 207         pcireg_t reg;
 208
 209         if (ALI1543_LEGAL_LINK(clink) == 0 || ALI1543_LEGAL_IRQ(irq) == 0)
 210                 return (1);
 211
 212         reg = pci_conf_read(ph->ph_pc, ph->ph_tag, ALI1543_INTR_CFG_REG);
 213         ali1543_get_intr(v, clink, &val);
 214         shift = ALI1543_INTR_PIRQ_SHIFT(clink);
 215         reg &= ~(0x0f << shift);
 216         reg |= (ali1543_intr_shuffle_set[irq] << shift);
 217         pci_conf_write(ph->ph_pc, ph->ph_tag, ALI1543_INTR_CFG_REG, reg);
 218         if (ali1543_get_intr(v, clink, &val) != 0 || val != irq)
 219                 return (1);
 220
 221         return (0);
 222 }