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   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 }