Annotation of sys/arch/i386/pci/ali1543.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: ali1543.c,v 1.2 2002/05/02 17:46:00 mickey Exp $ */
2: /* $NetBSD: ali1543.c,v 1.2 2001/09/13 14:00:52 tshiozak Exp $ */
3:
4: /*
5: * Copyright (c) 2001
6: * HAYAKAWA Koichi. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. The name of the author may not be used to endorse or promote products
17: * derived from this software without specific prior written permission.
18: *
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
22: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
23: * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
24: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
25: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
26: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
28: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
29: * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30: * POSSIBILITY OF SUCH DAMAGE.
31: */
32:
33: /*-
34: * Copyright (c) 1999 The NetBSD Foundation, Inc.
35: * All rights reserved.
36: *
37: * This code is derived from software contributed to The NetBSD Foundation
38: * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
39: * NASA Ames Research Center.
40: *
41: * Redistribution and use in source and binary forms, with or without
42: * modification, are permitted provided that the following conditions
43: * are met:
44: * 1. Redistributions of source code must retain the above copyright
45: * notice, this list of conditions and the following disclaimer.
46: * 2. Redistributions in binary form must reproduce the above copyright
47: * notice, this list of conditions and the following disclaimer in the
48: * documentation and/or other materials provided with the distribution.
49: * 3. All advertising materials mentioning features or use of this software
50: * must display the following acknowledgement:
51: * This product includes software developed by the NetBSD
52: * Foundation, Inc. and its contributors.
53: * 4. Neither the name of The NetBSD Foundation nor the names of its
54: * contributors may be used to endorse or promote products derived
55: * from this software without specific prior written permission.
56: *
57: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
58: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
59: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
60: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
61: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
62: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
63: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
64: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
65: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
66: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
67: * POSSIBILITY OF SUCH DAMAGE.
68: */
69:
70: /*
71: * Copyright (c) 1999, by UCHIYAMA Yasushi
72: * All rights reserved.
73: *
74: * Redistribution and use in source and binary forms, with or without
75: * modification, are permitted provided that the following conditions
76: * are met:
77: * 1. Redistributions of source code must retain the above copyright
78: * notice, this list of conditions and the following disclaimer.
79: * 2. The name of the developer may NOT be used to endorse or promote products
80: * derived from this software without specific prior written permission.
81: *
82: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
83: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
84: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
85: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
86: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
87: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
88: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
89: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
90: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
91: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
92: * SUCH DAMAGE.
93: */
94:
95: /* HAYAKAWA Koichi wrote ALi 1543 PCI ICU code basing on VIA82C586 driver */
96:
97: #include <sys/param.h>
98: #include <sys/systm.h>
99: #include <sys/errno.h>
100: #include <sys/device.h>
101: #include <sys/malloc.h>
102: #include <sys/proc.h>
103:
104: #include <machine/intr.h>
105: #include <machine/bus.h>
106:
107: #include <dev/pci/pcivar.h>
108: #include <dev/pci/pcireg.h>
109: #include <dev/pci/pcidevs.h>
110:
111: #include <i386/pci/pcibiosvar.h>
112: #include <i386/pci/piixvar.h>
113:
114:
115: int ali1543_getclink (pciintr_icu_handle_t, int, int *);
116: int ali1543_get_intr (pciintr_icu_handle_t, int, int *);
117: int ali1543_set_intr (pciintr_icu_handle_t, int, int);
118:
119:
120: const struct pciintr_icu ali1543_icu = {
121: ali1543_getclink,
122: ali1543_get_intr,
123: ali1543_set_intr,
124: piix_get_trigger,
125: piix_set_trigger,
126: };
127:
128:
129: /*
130: * Linux source code (linux/arch/i386/kernel/pci-irq.c) says that the
131: * irq order of ALi PCI ICU is shuffled.
132: */
133: const static int ali1543_intr_shuffle_get[16] = {
134: 0, 9, 3, 10, 4, 5, 7, 6, 1, 11, 0, 12, 0, 14, 0, 15
135: };
136: const static int ali1543_intr_shuffle_set[16] = {
137: 0, 8, 0, 2, 4, 5, 7, 6, 0, 1, 3, 9, 11, 0, 13, 15
138: };
139:
140: #define ALI1543_IRQ_MASK 0xdefa
141:
142: #define ALI1543_LEGAL_LINK(link) (((link) >= 0) && ((link) <= 7))
143: #define ALI1543_LEGAL_IRQ(irq) ((1 << (irq)) & ALI1543_IRQ_MASK)
144:
145: #define ALI1543_INTR_CFG_REG 0x48
146:
147: #define ALI1543_INTR_PIRQA_SHIFT 0
148: #define ALI1543_INTR_PIRQA_MASK 0x0000000f
149: #define ALI1543_INTR_PIRQB_SHIFT 4
150: #define ALI1543_INTR_PIRQB_MASK 0x000000f0
151: #define ALI1543_INTR_PIRQC_SHIFT 8
152: #define ALI1543_INTR_PIRQC_MASK 0x00000f00
153: #define ALI1543_INTR_PIRQD_SHIFT 12
154: #define ALI1543_INTR_PIRQD_MASK 0x0000f000
155:
156: #define ALI1543_INTR_PIRQ_SHIFT(clink) ((clink)*4)
157: #define ALI1543_INTR_PIRQ_IRQ(reg, clink) \
158: (((reg) >> ((clink)*4)) & 0x0f)
159: #define ALI1543_PIRQ(reg, clink) \
160: ali1543_intr_shuffle_get[ALI1543_INTR_PIRQ_IRQ((reg), (clink))]
161:
162:
163: int
164: ali1543_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag,
165: pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp)
166: {
167:
168: if (piix_init(pc, iot, tag, ptagp, phandp) == 0) {
169: *ptagp = &ali1543_icu;
170:
171: return (0);
172: }
173:
174: return (1);
175: }
176:
177: int
178: ali1543_getclink(pciintr_icu_handle_t v, int link, int *clinkp)
179: {
180:
181: if (ALI1543_LEGAL_LINK(link - 1)) {
182: *clinkp = link - 1;
183: return (0);
184: }
185:
186: return (1);
187: }
188:
189: int
190: ali1543_get_intr(pciintr_icu_handle_t v, int clink, int *irqp)
191: {
192: struct piix_handle *ph = v;
193: pcireg_t reg;
194: int val;
195:
196: if (ALI1543_LEGAL_LINK(clink) == 0)
197: return (1);
198:
199: reg = pci_conf_read(ph->ph_pc, ph->ph_tag, ALI1543_INTR_CFG_REG);
200: #ifdef DEBUG_1543
201: printf("ali1543: PIRQ reg 0x%08x\n", reg); /* XXX debug */
202: #endif /* DEBUG_1543 */
203: val = ALI1543_PIRQ(reg, clink);
204: *irqp = (val == 0) ?
205: I386_PCI_INTERRUPT_LINE_NO_CONNECTION : val;
206:
207: return (0);
208: }
209:
210: int
211: ali1543_set_intr(pciintr_icu_handle_t v, int clink, int irq)
212: {
213: struct piix_handle *ph = v;
214: int shift, val;
215: pcireg_t reg;
216:
217: if (ALI1543_LEGAL_LINK(clink) == 0 || ALI1543_LEGAL_IRQ(irq) == 0)
218: return (1);
219:
220: reg = pci_conf_read(ph->ph_pc, ph->ph_tag, ALI1543_INTR_CFG_REG);
221: ali1543_get_intr(v, clink, &val);
222: shift = ALI1543_INTR_PIRQ_SHIFT(clink);
223: reg &= ~(0x0f << shift);
224: reg |= (ali1543_intr_shuffle_set[irq] << shift);
225: pci_conf_write(ph->ph_pc, ph->ph_tag, ALI1543_INTR_CFG_REG, reg);
226: if (ali1543_get_intr(v, clink, &val) != 0 || val != irq)
227: return (1);
228:
229: return (0);
230: }
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