1 /* $NetBSD: ali1543.c,v 1.13 2023/12/20 15:00:08 thorpej 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 1.13 2023/12/20 15:00:08 thorpej 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/proc.h>
94
95 #include <machine/intr.h>
96 #include <sys/bus.h>
97
98 #include <dev/pci/pcivar.h>
99 #include <dev/pci/pcireg.h>
100 #include <dev/pci/pcidevs.h>
101
102 #include <i386/pci/pci_intr_fixup.h>
103 #include <i386/pci/piixvar.h>
104
105
106 int ali1543_getclink(pciintr_icu_handle_t, int, int *);
107 int ali1543_get_intr(pciintr_icu_handle_t, int, int *);
108 int ali1543_set_intr(pciintr_icu_handle_t, int, int);
109
110
111 const struct pciintr_icu ali1543_icu = {
112 ali1543_getclink,
113 ali1543_get_intr,
114 ali1543_set_intr,
115 piix_get_trigger,
116 piix_set_trigger,
117 };
118
119
120 /*
121 * Linux source code (linux/arch/i386/kernel/pci-irq.c) says that the
122 * irq order of ALi PCI ICU is shuffled.
123 */
124 static const int ali1543_intr_shuffle_get[16] = {
125 0, 9, 3, 10, 4, 5, 7, 6, 1, 11, 0, 12, 0, 14, 0, 15
126 };
127 static const int ali1543_intr_shuffle_set[16] = {
128 0, 8, 0, 2, 4, 5, 7, 6, 0, 1, 3, 9, 11, 0, 13, 15
129 };
130
131 #define ALI1543_IRQ_MASK 0xdefa
132
133 #define ALI1543_LEGAL_LINK(link) (((link) >= 0) && ((link) <= 7))
134 #define ALI1543_LEGAL_IRQ(irq) ((1 << (irq)) & ALI1543_IRQ_MASK)
135
136 #define ALI1543_INTR_CFG_REG 0x48
137
138 #define ALI1543_INTR_PIRQA_SHIFT 0
139 #define ALI1543_INTR_PIRQA_MASK 0x0000000f
140 #define ALI1543_INTR_PIRQB_SHIFT 4
141 #define ALI1543_INTR_PIRQB_MASK 0x000000f0
142 #define ALI1543_INTR_PIRQC_SHIFT 8
143 #define ALI1543_INTR_PIRQC_MASK 0x00000f00
144 #define ALI1543_INTR_PIRQD_SHIFT 12
145 #define ALI1543_INTR_PIRQD_MASK 0x0000f000
146
147 #define ALI1543_INTR_PIRQ_SHIFT(clink) ((clink)*4)
148 #define ALI1543_INTR_PIRQ_IRQ(reg, clink) \
149 (((reg) >> ((clink)*4)) & 0x0f)
150 #define ALI1543_PIRQ(reg, clink) \
151 ali1543_intr_shuffle_get[ALI1543_INTR_PIRQ_IRQ((reg), (clink))]
152
153
154 int
ali1543_init(pci_chipset_tag_t pc,bus_space_tag_t iot,pcitag_t tag,pciintr_icu_tag_t * ptagp,pciintr_icu_handle_t * phandp)155 ali1543_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag,
156 pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp)
157 {
158
159 if (piix_init(pc, iot, tag, ptagp, phandp) == 0) {
160 *ptagp = &ali1543_icu;
161
162 return (0);
163 }
164
165 return (1);
166 }
167
168 int
ali1543_getclink(pciintr_icu_handle_t v,int link,int * clinkp)169 ali1543_getclink(pciintr_icu_handle_t v, int link, int *clinkp)
170 {
171
172 if (ALI1543_LEGAL_LINK(link - 1)) {
173 *clinkp = link - 1;
174 return (0);
175 }
176
177 return (1);
178 }
179
180 int
ali1543_get_intr(pciintr_icu_handle_t v,int clink,int * irqp)181 ali1543_get_intr(pciintr_icu_handle_t v, int clink, int *irqp)
182 {
183 struct piix_handle *ph = v;
184 pcireg_t reg;
185 int val;
186
187 if (ALI1543_LEGAL_LINK(clink) == 0)
188 return (1);
189
190 reg = pci_conf_read(ph->ph_pc, ph->ph_tag, ALI1543_INTR_CFG_REG);
191 #ifdef DEBUG_1543
192 printf("ali1543: PIRQ reg 0x%08x\n", reg); /* XXX debug */
193 #endif /* DEBUG_1543 */
194 val = ALI1543_PIRQ(reg, clink);
195 *irqp = (val == 0) ?
196 X86_PCI_INTERRUPT_LINE_NO_CONNECTION : val;
197
198 return (0);
199 }
200
201 int
ali1543_set_intr(pciintr_icu_handle_t v,int clink,int irq)202 ali1543_set_intr(pciintr_icu_handle_t v, int clink, int irq)
203 {
204 struct piix_handle *ph = v;
205 int shift, val;
206 pcireg_t reg;
207
208 if (ALI1543_LEGAL_LINK(clink) == 0 || ALI1543_LEGAL_IRQ(irq) == 0)
209 return (1);
210
211 reg = pci_conf_read(ph->ph_pc, ph->ph_tag, ALI1543_INTR_CFG_REG);
212 ali1543_get_intr(v, clink, &val);
213 shift = ALI1543_INTR_PIRQ_SHIFT(clink);
214 reg &= ~(0x0f << shift);
215 reg |= (ali1543_intr_shuffle_set[irq] << shift);
216 pci_conf_write(ph->ph_pc, ph->ph_tag, ALI1543_INTR_CFG_REG, reg);
217 if (ali1543_get_intr(v, clink, &val) != 0 || val != irq)
218 return (1);
219
220 return (0);
221 }
222