si_pci.c revision 335087 
1/*-
2 * Device driver for Specialix range (SI/XIO) of serial line multiplexors.
3 *
4 * Copyright (C) 2000, Peter Wemm <peter@netplex.com.au>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notices, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notices, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
16 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
17 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
18 * NO EVENT SHALL THE AUTHORS BE LIABLE.
19 */
20
21#include <sys/cdefs.h>
22__FBSDID("$FreeBSD: stable/11/sys/dev/si/si_pci.c 335087 2018-06-13 20:33:52Z dim $");
23
24#include <sys/param.h>
25#include <sys/systm.h>
26#include <sys/kernel.h>
27#include <sys/module.h>
28#include <sys/bus.h>
29#include <machine/bus.h>
30#include <sys/rman.h>
31#include <machine/resource.h>
32
33#include <dev/si/sireg.h>
34#include <dev/si/sivar.h>
35
36#include <dev/pci/pcireg.h>
37#include <dev/pci/pcivar.h>
38
39static int
40si_pci_probe(device_t dev)
41{
42	const char *desc = NULL;
43
44	switch (pci_get_devid(dev)) {
45	case 0x400011cb:
46		desc = "Specialix SI/XIO PCI host card";
47		break;
48	case 0x200011cb:
49		if (pci_read_config(dev, SIJETSSIDREG, 4) == 0x020011cb)
50			desc = "Specialix SX PCI host card";
51		break;
52	}
53	if (desc) {
54		device_set_desc(dev, desc);
55		return BUS_PROBE_DEFAULT;
56	}
57	return ENXIO;
58}
59
60static int
61si_pci_attach(device_t dev)
62{
63	struct si_softc *sc;
64	void *ih;
65	int error;
66
67	error = 0;
68	ih = NULL;
69	sc = device_get_softc(dev);
70
71	switch (pci_get_devid(dev)) {
72	case 0x400011cb:
73		sc->sc_type = SIPCI;
74		sc->sc_mem_rid = SIPCIBADR;
75		break;
76	case 0x200011cb:
77		sc->sc_type = SIJETPCI;
78		sc->sc_mem_rid = SIJETBADR;
79		break;
80	}
81
82	sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
83						&sc->sc_mem_rid,
84						RF_ACTIVE);
85	if (!sc->sc_mem_res) {
86		device_printf(dev, "couldn't map memory\n");
87		goto fail;
88	}
89	sc->sc_paddr = (caddr_t)(uintptr_t)rman_get_start(sc->sc_mem_res);
90	sc->sc_maddr = rman_get_virtual(sc->sc_mem_res);
91
92	sc->sc_irq_rid = 0;
93	sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
94						&sc->sc_irq_rid,
95						RF_ACTIVE | RF_SHAREABLE);
96	if (!sc->sc_irq_res) {
97		device_printf(dev, "couldn't map interrupt\n");
98		goto fail;
99	}
100	sc->sc_irq = rman_get_start(sc->sc_irq_res);
101	error = bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_TTY,
102			       NULL, si_intr, sc, &ih);
103	if (error) {
104		device_printf(dev, "could not activate interrupt\n");
105		goto fail;
106	}
107
108	if (pci_get_devid(dev) == 0x200011cb) {
109		int rid;
110		struct resource *plx_res;
111		uint32_t *addr;
112		uint32_t oldvalue;
113
114		/* Perform a PLX control register fixup */
115		rid = PCIR_BAR(0);
116		plx_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
117		    RF_ACTIVE);
118		if (plx_res == NULL) {
119			device_printf(dev, "couldn't map plx registers\n");
120		} else {
121			addr = rman_get_virtual(plx_res);
122			oldvalue = addr[0x50 / 4];
123			if (oldvalue != 0x18260000) {
124				device_printf(dev, "PLX register 0x50: 0x%08x changed to 0x%08x\n", oldvalue, 0x18260000);
125				addr[0x50 / 4] = 0x18260000;
126			}
127			bus_release_resource(dev, SYS_RES_MEMORY, rid, plx_res);
128		}
129	}
130
131	error = siattach(dev);
132	if (error)
133		goto fail;
134	return (0);		/* success */
135
136fail:
137	if (error == 0)
138		error = ENXIO;
139	if (sc->sc_irq_res) {
140		if (ih)
141			bus_teardown_intr(dev, sc->sc_irq_res, ih);
142		bus_release_resource(dev, SYS_RES_IRQ,
143				     sc->sc_irq_rid, sc->sc_irq_res);
144		sc->sc_irq_res = 0;
145	}
146	if (sc->sc_mem_res) {
147		bus_release_resource(dev, SYS_RES_MEMORY,
148				     sc->sc_mem_rid, sc->sc_mem_res);
149		sc->sc_mem_res = 0;
150	}
151	return (error);
152}
153
154static device_method_t si_pci_methods[] = {
155	/* Device interface */
156	DEVMETHOD(device_probe,		si_pci_probe),
157	DEVMETHOD(device_attach,	si_pci_attach),
158
159	{ 0, 0 }
160};
161
162static driver_t si_pci_driver = {
163	"si",
164	si_pci_methods,
165	sizeof(struct si_softc),
166};
167
168DRIVER_MODULE(si, pci, si_pci_driver, si_devclass, 0, 0);
169