1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/sunddi.h>
32 #include <sys/sunndi.h>
33 #include <sys/modctl.h>
34 #include <sys/sysmacros.h>
35 #include <sys/platform_module.h>
36 #include <sys/errno.h>
37
38 /*
39 * This platmod is used by both SUNW,Sun-Fire-280R (a.k.a littleneck) and
40 * SUNW,Netra-T4 (a.k.a. lw2plus) platforms.
41 */
42
43 #define LITTLENECK_NVRAM_PATH "/pci@8,700000/ebus@5/i2c@1,2e/nvram@0,a0"
44 #define LW2PLUS_NVRAM_PATH "/pci@8,700000/ebus@5/i2c@1,30/nvram@0,e0"
45
46 static dev_info_t *shared_pcf8584_dip = NULL;
47 static kmutex_t lneck_pcf8584_mutex;
48
49 int (*p2get_mem_unum)(int, uint64_t, char *, int, int *);
50
51 void
startup_platform(void)52 startup_platform(void)
53 {
54 mutex_init(&lneck_pcf8584_mutex, NULL, NULL, NULL);
55 }
56
57 int
set_platform_tsb_spares()58 set_platform_tsb_spares()
59 {
60 return (0);
61 }
62
63 void
set_platform_defaults(void)64 set_platform_defaults(void)
65 {
66 }
67
68 void
load_platform_drivers(void)69 load_platform_drivers(void)
70 {
71 char **drv;
72 dev_info_t *nvram_dip;
73 static char *boot_time_drivers[] = {
74 "todds1287",
75 "pcf8574",
76 "mc-us3",
77 NULL
78 };
79
80 for (drv = boot_time_drivers; *drv; drv++) {
81 if (i_ddi_attach_hw_nodes(*drv) != DDI_SUCCESS)
82 cmn_err(CE_WARN, "Failed to install \"%s\" driver.",
83 *drv);
84 }
85
86 /* hold modules for keyswitch polling and plat_get_mem_unum() */
87 (void) ddi_hold_driver(ddi_name_to_major("pcf8574"));
88 (void) ddi_hold_driver(ddi_name_to_major("mc-us3"));
89
90 /*
91 * For littleneck we figure out which pcf8584 dip is shared with
92 * OBP for the nvram device, so the lock can be acquired.
93 * If this fails see if we're running on a Netra 20.
94 * The Netra 20 nvram node is the SCC and is also shared by
95 * Solaris and OBP.
96 */
97
98 nvram_dip = e_ddi_hold_devi_by_path(LITTLENECK_NVRAM_PATH, 0);
99
100 if (nvram_dip == NULL)
101 nvram_dip = e_ddi_hold_devi_by_path(LW2PLUS_NVRAM_PATH, 0);
102 if (nvram_dip == NULL)
103 cmn_err(CE_WARN, "Failed to hold pcf8584");
104 else {
105 shared_pcf8584_dip = ddi_get_parent(nvram_dip);
106
107 ndi_hold_devi(shared_pcf8584_dip);
108 ndi_rele_devi(nvram_dip);
109 }
110 }
111
112 /*ARGSUSED*/
113 int
plat_cpu_poweron(struct cpu * cp)114 plat_cpu_poweron(struct cpu *cp)
115 {
116 return (ENOTSUP); /* not supported on this platform */
117 }
118
119 /*ARGSUSED*/
120 int
plat_cpu_poweroff(struct cpu * cp)121 plat_cpu_poweroff(struct cpu *cp)
122 {
123 return (ENOTSUP); /* not supported on this platform */
124 }
125
126 /*ARGSUSED*/
127 void
plat_freelist_process(int mnode)128 plat_freelist_process(int mnode)
129 {
130 }
131
132 /*
133 * No platform drivers on this platform
134 */
135 char *platform_module_list[] = {
136 (char *)0
137 };
138
139 /*ARGSUSED*/
140 void
plat_tod_fault(enum tod_fault_type tod_bad)141 plat_tod_fault(enum tod_fault_type tod_bad)
142 {
143 }
144
145 /*ARGSUSED*/
146 int
plat_get_mem_unum(int synd_code,uint64_t flt_addr,int flt_bus_id,int flt_in_memory,ushort_t flt_status,char * buf,int buflen,int * lenp)147 plat_get_mem_unum(int synd_code, uint64_t flt_addr, int flt_bus_id,
148 int flt_in_memory, ushort_t flt_status, char *buf, int buflen, int *lenp)
149 {
150 if (flt_in_memory && (p2get_mem_unum != NULL))
151 return (p2get_mem_unum(synd_code, P2ALIGN(flt_addr, 8),
152 buf, buflen, lenp));
153 else
154 return (ENOTSUP);
155 }
156
157 int
plat_get_cpu_unum(int cpuid,char * buf,int buflen,int * lenp)158 plat_get_cpu_unum(int cpuid, char *buf, int buflen, int *lenp)
159 {
160 if (snprintf(buf, buflen, "Slot %d", cpuid) >= buflen) {
161 return (ENOSPC);
162 } else {
163 *lenp = strlen(buf);
164 return (0);
165 }
166 }
167
168 /*
169 * Littleneck's BBC pcf8584 controller is used by both OBP and the OS's i2c
170 * drivers. The 'eeprom' command executes OBP code to handle property requests.
171 * If eeprom didn't do this, or if the controllers were partitioned so that all
172 * devices on a given controller were driven by either OBP or the OS, this
173 * wouldn't be necessary.
174 *
175 * Note that getprop doesn't have the same issue as it reads from cached
176 * memory in OBP.
177 */
178
179 /*
180 * Common locking enter code
181 */
182 void
plat_setprop_enter(void)183 plat_setprop_enter(void)
184 {
185 mutex_enter(&lneck_pcf8584_mutex);
186 }
187
188 /*
189 * Common locking exit code
190 */
191 void
plat_setprop_exit(void)192 plat_setprop_exit(void)
193 {
194 mutex_exit(&lneck_pcf8584_mutex);
195 }
196
197 /*
198 * Called by pcf8584 driver
199 */
200 void
plat_shared_i2c_enter(dev_info_t * i2cnexus_dip)201 plat_shared_i2c_enter(dev_info_t *i2cnexus_dip)
202 {
203 if (i2cnexus_dip == shared_pcf8584_dip) {
204 plat_setprop_enter();
205 }
206 }
207
208 /*
209 * Called by pcf8584 driver
210 */
211 void
plat_shared_i2c_exit(dev_info_t * i2cnexus_dip)212 plat_shared_i2c_exit(dev_info_t *i2cnexus_dip)
213 {
214 if (i2cnexus_dip == shared_pcf8584_dip) {
215 plat_setprop_exit();
216 }
217 }
218