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