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 2003 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/sysmacros.h>
32 #include <sys/sunddi.h>
33 #include <sys/esunddi.h>
34 #include <sys/sunndi.h>
35
36 #include <sys/platform_module.h>
37 #include <sys/errno.h>
38
39 #define SHARED_SMBUS_PATH "/pci@1f,0/pci@1,1/pmu@3/i2c@0,0/i2c-nvram@0,8e"
40 static dev_info_t *shared_smbus_dip;
41 static kmutex_t snowbird_smbus_mutex;
42
43 void
44 startup_platform(void)
45 {
46 mutex_init(&snowbird_smbus_mutex, NULL, NULL, NULL);
47 }
48
49 int
50 set_platform_tsb_spares()
51 {
52 return (0);
53 }
54
55 void
56 set_platform_defaults(void)
57 {
58 extern char *tod_module_name;
59 tod_module_name = "todds1307";
60 }
61
62 /*
63 * Definitions for accessing the pci config space of the isa node
64 * of Southbridge.
65 */
66 #define PLATFORM_ISA_PATHNAME "/pci@1f,0/isa@7"
67 #define PLATFORM_ISA_PATHNAME_WITH_SIMBA "/pci@1f,0/pci@1,1/isa@7"
68 ddi_acc_handle_t platform_isa_handle; /* handle for isa pci space */
69
70 void
71 load_platform_drivers(void)
72 {
73 dev_info_t *dip; /* dip of the isa driver */
74
75 if (ddi_install_driver("power") != DDI_SUCCESS)
76 cmn_err(CE_WARN, "Failed to install \"power\" driver.");
77
78 /*
79 * It is OK to return error because 'us' driver is not available
80 * in all clusters (e.g. missing in Core cluster).
81 */
82 (void) ddi_install_driver("us");
83
84 /*
85 * Install Isa driver. This is required for the southbridge IDE
86 * workaround - to reset the IDE channel during IDE bus reset.
87 * Panic the system in case ISA driver could not be loaded or
88 * any problem in accessing its pci config space. Since the register
89 * to reset the channel for IDE is in ISA config space!.
90 */
91 dip = e_ddi_hold_devi_by_path(PLATFORM_ISA_PATHNAME_WITH_SIMBA, 0);
92
93 if (dip == NULL)
94 dip = e_ddi_hold_devi_by_path(PLATFORM_ISA_PATHNAME, 0);
95
96 if (dip == NULL) {
97 cmn_err(CE_PANIC, "Could not install the isa driver\n");
98 return;
99 }
100
101 if (pci_config_setup(dip, &platform_isa_handle) != DDI_SUCCESS) {
102 cmn_err(CE_PANIC, "Could not get the config space of isa\n");
103 return;
104 }
105
106 /*
107 * Figure out which smbus_dip is shared with OBP for the nvram
108 * device, so the lock can be acquired.
109 *
110 * This should really be done elsewhere, like startup_platform, but
111 * that runs before the devinfo tree is setup with configure().
112 * So it is here until there is a better place.
113 */
114 dip = e_ddi_hold_devi_by_path(SHARED_SMBUS_PATH, 0);
115
116 if (dip != NULL) {
117 ASSERT(dip != NULL);
118 shared_smbus_dip = ddi_get_parent(dip);
119
120 ndi_hold_devi(shared_smbus_dip);
121 ndi_rele_devi(dip);
122 } else {
123 shared_smbus_dip = NULL;
124 }
125
126 /*
127 * Install the TOD driver
128 */
129 if (ddi_install_driver("todds1307") != DDI_SUCCESS)
130 cmn_err(CE_WARN, "Failed to install \"todds1307\" driver.");
131 }
132
133 /*
134 * This routine provides a workaround for a bug in the SB chip which
135 * can cause data corruption. Will be invoked from the IDE HBA driver for
136 * Acer SouthBridge at the time of IDE bus reset.
137 */
138 /*ARGSUSED*/
139 int
140 plat_ide_chipreset(dev_info_t *dip, int chno)
141 {
142 uint8_t val;
143 int ret = DDI_SUCCESS;
144
145 val = pci_config_get8(platform_isa_handle, 0x58);
146 /*
147 * The dip passed as the argument is not used for snowbird.
148 * This will be needed for platforms which have multiple on-board SB,
149 * The dip passed will be used to match the corresponding ISA node.
150 */
151 switch (chno) {
152 case 0:
153 /*
154 * First disable the primary channel then re-enable it.
155 * As per ALI no wait should be required in between have
156 * given 1ms delay in between to be on safer side.
157 * bit 2 of register 0x58 when 0 disable the channel 0.
158 * bit 2 of register 0x58 when 1 enables the channel 0.
159 */
160 pci_config_put8(platform_isa_handle, 0x58, val & 0xFB);
161 drv_usecwait(1000);
162 pci_config_put8(platform_isa_handle, 0x58, val);
163 break;
164 case 1:
165 /*
166 * bit 3 of register 0x58 when 0 disable the channel 1.
167 * bit 3 of register 0x58 when 1 enables the channel 1.
168 */
169 pci_config_put8(platform_isa_handle, 0x58, val & 0xF7);
170 drv_usecwait(1000);
171 pci_config_put8(platform_isa_handle, 0x58, val);
172 break;
173 default:
174 /*
175 * Unknown channel number passed. Return failure.
176 */
177 ret = DDI_FAILURE;
178 }
179
180 return (ret);
181 }
182
183
184
185 /*ARGSUSED*/
186 int
187 plat_cpu_poweron(struct cpu *cp)
188 {
189 return (ENOTSUP); /* not supported on this platform */
190 }
191
192 /*ARGSUSED*/
193 int
194 plat_cpu_poweroff(struct cpu *cp)
195 {
196 return (ENOTSUP); /* not supported on this platform */
197 }
198
199 /*ARGSUSED*/
200 void
201 plat_freelist_process(int mnode)
202 {
203 }
204
205 char *platform_module_list[] = {
206 (char *)0
207 };
208
209 /*ARGSUSED*/
210 void
211 plat_tod_fault(enum tod_fault_type tod_bad)
212 {
213 }
214
215 /*
216 * Unfortunately, snowbird's smbus controller is used by both OBP
217 * and the OS's i2c drivers. The 'eeprom' command executes
218 * OBP code to handle property requests. If eeprom didn't do this, or if the
219 * controllers were partitioned so that all devices on a given controller were
220 * driven by either OBP or the OS, this wouldn't be necessary.
221 *
222 * Note that getprop doesn't have the same issue as it reads from cached
223 * memory in OBP.
224 */
225
226 /*
227 * Common locking enter code
228 */
229 void
230 plat_setprop_enter(void)
231 {
232 mutex_enter(&snowbird_smbus_mutex);
233 }
234
235 /*
236 * Common locking exit code
237 */
238 void
239 plat_setprop_exit(void)
240 {
241 mutex_exit(&snowbird_smbus_mutex);
242 }
243
244 /*
245 * Called by smbus driver
246 */
247 void
248 plat_shared_i2c_enter(dev_info_t *dip)
249 {
250 if (dip == shared_smbus_dip) {
251 plat_setprop_enter();
252 }
253 }
254
255 /*
256 * Called by smbus driver
257 */
258 void
259 plat_shared_i2c_exit(dev_info_t *dip)
260 {
261 if (dip == shared_smbus_dip) {
262 plat_setprop_exit();
263 }
264 }