Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy...
[linux-2.6] / arch / alpha / kernel / smc37c93x.c
1 /*
2  * SMC 37C93X initialization code
3  */
4
5 #include <linux/kernel.h>
6
7 #include <linux/slab.h>
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 #include <asm/segment.h>
15
16 #define SMC_DEBUG 0
17
18 #if SMC_DEBUG
19 # define DBG_DEVS(args)         printk args
20 #else
21 # define DBG_DEVS(args)
22 #endif
23
24 #define KB              1024
25 #define MB              (1024*KB)
26 #define GB              (1024*MB)
27
28 /* device "activate" register contents */
29 #define DEVICE_ON               1
30 #define DEVICE_OFF              0
31
32 /* configuration on/off keys */
33 #define CONFIG_ON_KEY           0x55
34 #define CONFIG_OFF_KEY          0xaa
35
36 /* configuration space device definitions */
37 #define FDC                     0
38 #define IDE1                    1
39 #define IDE2                    2
40 #define PARP                    3
41 #define SER1                    4
42 #define SER2                    5
43 #define RTCL                    6
44 #define KYBD                    7
45 #define AUXIO                   8
46
47 /* Chip register offsets from base */
48 #define CONFIG_CONTROL          0x02
49 #define INDEX_ADDRESS           0x03
50 #define LOGICAL_DEVICE_NUMBER   0x07
51 #define DEVICE_ID               0x20
52 #define DEVICE_REV              0x21
53 #define POWER_CONTROL           0x22
54 #define POWER_MGMT              0x23
55 #define OSC                     0x24
56
57 #define ACTIVATE                0x30
58 #define ADDR_HI                 0x60
59 #define ADDR_LO                 0x61
60 #define INTERRUPT_SEL           0x70
61 #define INTERRUPT_SEL_2         0x72 /* KYBD/MOUS only */
62 #define DMA_CHANNEL_SEL         0x74 /* FDC/PARP only */
63
64 #define FDD_MODE_REGISTER       0x90
65 #define FDD_OPTION_REGISTER     0x91
66
67 /* values that we read back that are expected ... */
68 #define VALID_DEVICE_ID         2
69
70 /* default device addresses */
71 #define KYBD_INTERRUPT          1
72 #define MOUS_INTERRUPT          12
73 #define COM2_BASE               0x2f8
74 #define COM2_INTERRUPT          3
75 #define COM1_BASE               0x3f8
76 #define COM1_INTERRUPT          4
77 #define PARP_BASE               0x3bc
78 #define PARP_INTERRUPT          7
79
80 static unsigned long __init SMCConfigState(unsigned long baseAddr)
81 {
82         unsigned char devId;
83         unsigned char devRev;
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                         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 }