1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * SMC 37C93X initialization code
4 */
5
6 #include <linux/kernel.h>
7
8 #include <linux/mm.h>
9 #include <linux/init.h>
10 #include <linux/delay.h>
11
12 #include <asm/hwrpb.h>
13 #include <asm/io.h>
14
15 #include "proto.h"
16
17 #define SMC_DEBUG 0
18
19 #if SMC_DEBUG
20 # define DBG_DEVS(args) printk args
21 #else
22 # define DBG_DEVS(args)
23 #endif
24
25 #define KB 1024
26 #define MB (1024*KB)
27 #define GB (1024*MB)
28
29 /* device "activate" register contents */
30 #define DEVICE_ON 1
31 #define DEVICE_OFF 0
32
33 /* configuration on/off keys */
34 #define CONFIG_ON_KEY 0x55
35 #define CONFIG_OFF_KEY 0xaa
36
37 /* configuration space device definitions */
38 #define FDC 0
39 #define IDE1 1
40 #define IDE2 2
41 #define PARP 3
42 #define SER1 4
43 #define SER2 5
44 #define RTCL 6
45 #define KYBD 7
46 #define AUXIO 8
47
48 /* Chip register offsets from base */
49 #define CONFIG_CONTROL 0x02
50 #define INDEX_ADDRESS 0x03
51 #define LOGICAL_DEVICE_NUMBER 0x07
52 #define DEVICE_ID 0x20
53 #define DEVICE_REV 0x21
54 #define POWER_CONTROL 0x22
55 #define POWER_MGMT 0x23
56 #define OSC 0x24
57
58 #define ACTIVATE 0x30
59 #define ADDR_HI 0x60
60 #define ADDR_LO 0x61
61 #define INTERRUPT_SEL 0x70
62 #define INTERRUPT_SEL_2 0x72 /* KYBD/MOUS only */
63 #define DMA_CHANNEL_SEL 0x74 /* FDC/PARP only */
64
65 #define FDD_MODE_REGISTER 0x90
66 #define FDD_OPTION_REGISTER 0x91
67
68 /* values that we read back that are expected ... */
69 #define VALID_DEVICE_ID 2
70
71 /* default device addresses */
72 #define KYBD_INTERRUPT 1
73 #define MOUS_INTERRUPT 12
74 #define COM2_BASE 0x2f8
75 #define COM2_INTERRUPT 3
76 #define COM1_BASE 0x3f8
77 #define COM1_INTERRUPT 4
78 #define PARP_BASE 0x3bc
79 #define PARP_INTERRUPT 7
80
81 static unsigned long __init SMCConfigState(unsigned long baseAddr)
82 {
83 unsigned char devId;
84
85 unsigned long configPort;
86 unsigned long indexPort;
87 unsigned long dataPort;
88
89 int i;
90
91 configPort = indexPort = baseAddr;
92 dataPort = configPort + 1;
93
94 #define NUM_RETRIES 5
95
96 for (i = 0; i < NUM_RETRIES; i++)
97 {
98 outb(CONFIG_ON_KEY, configPort);
99 outb(CONFIG_ON_KEY, configPort);
100 outb(DEVICE_ID, indexPort);
101 devId = inb(dataPort);
102 if (devId == VALID_DEVICE_ID) {
103 outb(DEVICE_REV, indexPort);
104 /* unsigned char devRev = */ inb(dataPort);
105 break;
106 }
107 else
108 udelay(100);
109 }
110 return (i != NUM_RETRIES) ? baseAddr : 0L;
111 }
112
113 static void __init SMCRunState(unsigned long baseAddr)
114 {
115 outb(CONFIG_OFF_KEY, baseAddr);
116 }
117
118 static unsigned long __init SMCDetectUltraIO(void)
119 {
120 unsigned long baseAddr;
121
122 baseAddr = 0x3F0;
123 if ( ( baseAddr = SMCConfigState( baseAddr ) ) == 0x3F0 ) {
124 return( baseAddr );
125 }
126 baseAddr = 0x370;
127 if ( ( baseAddr = SMCConfigState( baseAddr ) ) == 0x370 ) {
128 return( baseAddr );
129 }
130 return( ( unsigned long )0 );
131 }
132
133 static void __init SMCEnableDevice(unsigned long baseAddr,
134 unsigned long device,
135 unsigned long portaddr,
136 unsigned long interrupt)
137 {
138 unsigned long indexPort;
139 unsigned long dataPort;
140
141 indexPort = baseAddr;
142 dataPort = baseAddr + 1;
143
144 outb(LOGICAL_DEVICE_NUMBER, indexPort);
145 outb(device, dataPort);
146
147 outb(ADDR_LO, indexPort);
148 outb(( portaddr & 0xFF ), dataPort);
149
150 outb(ADDR_HI, indexPort);
151 outb((portaddr >> 8) & 0xFF, dataPort);
152
153 outb(INTERRUPT_SEL, indexPort);
154 outb(interrupt, dataPort);
155
156 outb(ACTIVATE, indexPort);
157 outb(DEVICE_ON, dataPort);
158 }
159
160 static void __init SMCEnableKYBD(unsigned long baseAddr)
161 {
162 unsigned long indexPort;
163 unsigned long dataPort;
164
165 indexPort = baseAddr;
166 dataPort = baseAddr + 1;
167
168 outb(LOGICAL_DEVICE_NUMBER, indexPort);
169 outb(KYBD, dataPort);
170
171 outb(INTERRUPT_SEL, indexPort); /* Primary interrupt select */
172 outb(KYBD_INTERRUPT, dataPort);
173
174 outb(INTERRUPT_SEL_2, indexPort); /* Secondary interrupt select */
175 outb(MOUS_INTERRUPT, dataPort);
176
177 outb(ACTIVATE, indexPort);
178 outb(DEVICE_ON, dataPort);
179 }
180
181 static void __init SMCEnableFDC(unsigned long baseAddr)
182 {
183 unsigned long indexPort;
184 unsigned long dataPort;
185
186 unsigned char oldValue;
187
188 indexPort = baseAddr;
189 dataPort = baseAddr + 1;
190
191 outb(LOGICAL_DEVICE_NUMBER, indexPort);
192 outb(FDC, dataPort);
193
194 outb(FDD_MODE_REGISTER, indexPort);
195 oldValue = inb(dataPort);
196
197 oldValue |= 0x0E; /* Enable burst mode */
198 outb(oldValue, dataPort);
199
200 outb(INTERRUPT_SEL, indexPort); /* Primary interrupt select */
201 outb(0x06, dataPort );
202
203 outb(DMA_CHANNEL_SEL, indexPort); /* DMA channel select */
204 outb(0x02, dataPort);
205
206 outb(ACTIVATE, indexPort);
207 outb(DEVICE_ON, dataPort);
208 }
209
210 #if SMC_DEBUG
211 static void __init SMCReportDeviceStatus(unsigned long baseAddr)
212 {
213 unsigned long indexPort;
214 unsigned long dataPort;
215 unsigned char currentControl;
216
217 indexPort = baseAddr;
218 dataPort = baseAddr + 1;
219
220 outb(POWER_CONTROL, indexPort);
221 currentControl = inb(dataPort);
222
223 printk(currentControl & (1 << FDC)
224 ? "\t+FDC Enabled\n" : "\t-FDC Disabled\n");
225 printk(currentControl & (1 << IDE1)
226 ? "\t+IDE1 Enabled\n" : "\t-IDE1 Disabled\n");
227 printk(currentControl & (1 << IDE2)
228 ? "\t+IDE2 Enabled\n" : "\t-IDE2 Disabled\n");
229 printk(currentControl & (1 << PARP)
230 ? "\t+PARP Enabled\n" : "\t-PARP Disabled\n");
231 printk(currentControl & (1 << SER1)
232 ? "\t+SER1 Enabled\n" : "\t-SER1 Disabled\n");
233 printk(currentControl & (1 << SER2)
234 ? "\t+SER2 Enabled\n" : "\t-SER2 Disabled\n");
235
236 printk( "\n" );
237 }
238 #endif
239
240 int __init SMC93x_Init(void)
241 {
242 unsigned long SMCUltraBase;
243 unsigned long flags;
244
245 local_irq_save(flags);
246 if ((SMCUltraBase = SMCDetectUltraIO()) != 0UL) {
247 #if SMC_DEBUG
248 SMCReportDeviceStatus(SMCUltraBase);
249 #endif
250 SMCEnableDevice(SMCUltraBase, SER1, COM1_BASE, COM1_INTERRUPT);
251 DBG_DEVS(("SMC FDC37C93X: SER1 done\n"));
252 SMCEnableDevice(SMCUltraBase, SER2, COM2_BASE, COM2_INTERRUPT);
253 DBG_DEVS(("SMC FDC37C93X: SER2 done\n"));
254 SMCEnableDevice(SMCUltraBase, PARP, PARP_BASE, PARP_INTERRUPT);
255 DBG_DEVS(("SMC FDC37C93X: PARP done\n"));
256 /* On PC164, IDE on the SMC is not enabled;
257 CMD646 (PCI) on MB */
258 SMCEnableKYBD(SMCUltraBase);
259 DBG_DEVS(("SMC FDC37C93X: KYB done\n"));
260 SMCEnableFDC(SMCUltraBase);
261 DBG_DEVS(("SMC FDC37C93X: FDC done\n"));
262 #if SMC_DEBUG
263 SMCReportDeviceStatus(SMCUltraBase);
264 #endif
265 SMCRunState(SMCUltraBase);
266 local_irq_restore(flags);
267 printk("SMC FDC37C93X Ultra I/O Controller found @ 0x%lx\n",
268 SMCUltraBase);
269 return 1;
270 }
271 else {
272 local_irq_restore(flags);
273 DBG_DEVS(("No SMC FDC37C93X Ultra I/O Controller found\n"));
274 return 0;
275 }
276 }
277
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