drivers/misc/ali512x.c

   1 /*
   2  * (C) Copyright 2002
   3  * Daniel Engström, Omicron Ceti AB <daniel@omicron.se>.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 /*
   9  * Based on sc520cdp.c from rolo 1.6:
  10  *----------------------------------------------------------------------
  11  * (C) Copyright 2000
  12  * Sysgo Real-Time Solutions GmbH
  13  * Klein-Winternheim, Germany
  14  *----------------------------------------------------------------------
  15  */
  16
  17 #include <config.h>
  18
  19 #include <common.h>
  20 #include <asm/io.h>
  21 #include <ali512x.h>
  22
  23
  24 /* ALI M5123 Logical device numbers:
  25  * 0 FDC
  26  * 1 unused?
  27  * 2 unused?
  28  * 3 lpt
  29  * 4 UART1
  30  * 5 UART2
  31  * 6 RTC
  32  * 7 mouse/kbd
  33  * 8 CIO
  34  */
  35
  36 /*
  37  ************************************************************
  38  *  Some access primitives for the ALi chip:                *
  39  ************************************************************
  40  */
  41
  42 static void ali_write(u8 index, u8 value)
  43 {
  44         /* write an arbirary register */
  45         outb(index, ALI_INDEX);
  46         outb(value, ALI_DATA);
  47 }
  48
  49 #if 0
  50 static int ali_read(u8 index)
  51 {
  52         outb(index, ALI_INDEX);
  53         return inb(ALI_DATA);
  54 }
  55 #endif
  56
  57 #define ALI_OPEN() \
  58         outb(0x51, ALI_INDEX); \
  59         outb(0x23, ALI_INDEX)
  60
  61
  62 #define ALI_CLOSE() \
  63         outb(0xbb, ALI_INDEX)
  64
  65 /* Select a logical device */
  66 #define ALI_SELDEV(dev) \
  67         ali_write(0x07, dev)
  68
  69
  70 void ali512x_init(void)
  71 {
  72         ALI_OPEN();
  73
  74         ali_write(0x02, 0x01);  /* soft reset */
  75         ali_write(0x03, 0x03);  /* disable access to CIOs */
  76         ali_write(0x22, 0x00);  /* disable direct powerdown */
  77         ali_write(0x23, 0x00);  /* disable auto powerdown */
  78         ali_write(0x24, 0x00);  /* IR 8 is active hi, pin26 is PDIR */
  79
  80         ALI_CLOSE();
  81 }
  82
  83 void ali512x_set_fdc(int enabled, u16 io, u8 irq, u8 dma_channel)
  84 {
  85         ALI_OPEN();
  86         ALI_SELDEV(0);
  87
  88         ali_write(0x30, enabled?1:0);
  89         if (enabled) {
  90                 ali_write(0x60, io >> 8);
  91                 ali_write(0x61, io & 0xff);
  92                 ali_write(0x70, irq);
  93                 ali_write(0x74, dma_channel);
  94
  95                 /* AT mode, no drive swap */
  96                 ali_write(0xf0, 0x08);
  97                 ali_write(0xf1, 0x00);
  98                 ali_write(0xf2, 0xff);
  99                 ali_write(0xf4, 0x00);
 100         }
 101         ALI_CLOSE();
 102 }
 103
 104
 105 void ali512x_set_pp(int enabled, u16 io, u8 irq, u8 dma_channel)
 106 {
 107         ALI_OPEN();
 108         ALI_SELDEV(3);
 109
 110         ali_write(0x30, enabled?1:0);
 111         if (enabled) {
 112                 ali_write(0x60, io >> 8);
 113                 ali_write(0x61, io & 0xff);
 114                 ali_write(0x70, irq);
 115                 ali_write(0x74, dma_channel);
 116
 117                 /* mode: EPP 1.9, ECP FIFO threshold = 7, IRQ active low */
 118                 ali_write(0xf0, 0xbc);
 119                 /* 12 MHz, Burst DMA in ECP */
 120                 ali_write(0xf1, 0x05);
 121         }
 122         ALI_CLOSE();
 123
 124 }
 125
 126 void ali512x_set_uart(int enabled, int index, u16 io, u8 irq)
 127 {
 128         ALI_OPEN();
 129         ALI_SELDEV(index?5:4);
 130
 131         ali_write(0x30, enabled?1:0);
 132         if (enabled) {
 133                 ali_write(0x60, io >> 8);
 134                 ali_write(0x61, io & 0xff);
 135                 ali_write(0x70, irq);
 136
 137                 ali_write(0xf0, 0x00);
 138                 ali_write(0xf1, 0x00);
 139
 140                 /* huh? write 0xf2 twice - a typo in rolo
 141                  * or some secret ali errata? Who knows?
 142                  */
 143                 if (index) {
 144                         ali_write(0xf2, 0x00);
 145                 }
 146                 ali_write(0xf2, 0x0c);
 147         }
 148         ALI_CLOSE();
 149
 150 }
 151
 152 void ali512x_set_uart2_irda(int enabled)
 153 {
 154         ALI_OPEN();
 155         ALI_SELDEV(5);
 156
 157         ali_write(0xf1, enabled?0x48:0x00); /* fullduplex IrDa */
 158         ALI_CLOSE();
 159
 160 }
 161
 162 void ali512x_set_rtc(int enabled, u16 io, u8 irq)
 163 {
 164         ALI_OPEN();
 165         ALI_SELDEV(6);
 166
 167         ali_write(0x30, enabled?1:0);
 168         if (enabled) {
 169                 ali_write(0x60, io >> 8);
 170                 ali_write(0x61, io & 0xff);
 171                 ali_write(0x70, irq);
 172
 173                 ali_write(0xf0, 0x00);
 174         }
 175         ALI_CLOSE();
 176 }
 177
 178 void ali512x_set_kbc(int enabled, u8 kbc_irq, u8 mouse_irq)
 179 {
 180         ALI_OPEN();
 181         ALI_SELDEV(7);
 182
 183         ali_write(0x30, enabled?1:0);
 184         if (enabled) {
 185                 ali_write(0x70, kbc_irq);
 186                 ali_write(0x72, mouse_irq);
 187
 188                 ali_write(0xf0, 0x00);
 189         }
 190         ALI_CLOSE();
 191 }
 192
 193
 194 /* Common I/O
 195  *
 196  * (This descripotsion is base on several incompete sources
 197  *  since I have not been able to obtain any datasheet for the device
 198  *  there may be some mis-understandings burried in here.
 199  *  -- Daniel daniel@omicron.se)
 200  *
 201  * There are 22 CIO pins numbered
 202  * 10-17
 203  * 20-25
 204  * 30-37
 205  *
 206  * 20-24 are dedicated CIO pins, the other 17 are muliplexed with
 207  * other functions.
 208  *
 209  *           Secondary
 210  * CIO Pin   Function    Decription
 211  * =======================================================
 212  * CIO10     IRQIN1      Interrupt input 1?
 213  * CIO11     IRQIN2      Interrupt input 2?
 214  * CIO12     IRRX        IrDa Receive
 215  * CIO13     IRTX        IrDa Transmit
 216  * CIO14     P21         KBC P21 fucntion
 217  * CIO15     P20         KBC P21 fucntion
 218  * CIO16     I2C_CLK     I2C Clock
 219  * CIO17     I2C_DAT     I2C Data
 220  *
 221  * CIO20     -
 222  * CIO21     -
 223  * CIO22     -
 224  * CIO23     -
 225  * CIO24     -
 226  * CIO25     LOCK        Keylock
 227  *
 228  * CIO30     KBC_CLK     Keybaord Clock
 229  * CIO31     CS0J        General Chip Select decoder CS0J
 230  * CIO32     CS1J        General Chip Select decoder CS1J
 231  * CIO33     ALT_KCLK    Alternative Keyboard Clock
 232  * CIO34     ALT_KDAT    Alternative Keyboard Data
 233  * CIO35     ALT_MCLK    Alternative Mouse Clock
 234  * CIO36     ALT_MDAT    Alternative Mouse Data
 235  * CIO37     ALT_KBC     Alternative KBC select
 236  *
 237  * The CIO use an indirect address scheme.
 238  *
 239  * Reigster 3 in the SIO is used to select the index and data
 240  * port addresses where the CIO I/O registers show up.
 241  * The function selection registers are accessible under
 242  * function SIO 8.
 243  *
 244  * SIO reigster 3 (CIO Address Selection) bit definitions:
 245  * bit 7   CIO index and data registers enabled
 246  * bit 1-0 CIO indirect registers port address select
 247  *       0  index = 0xE0 data = 0xE1
 248  *       1  index = 0xE2 data = 0xE3
 249  *       2  index = 0xE4 data = 0xE5
 250  *       3  index = 0xEA data = 0xEB
 251  *
 252  * There are three CIO I/O register accessed via CIO index port and CIO data port
 253  * 0x01     CIO 10-17 data
 254  * 0x02     CIO 20-25 data (bits 7-6 unused)
 255  * 0x03     CIO 30-37 data
 256  *
 257  *
 258  * The pin function is accessed through normal
 259  * SIO registers, each register have the same format:
 260  *
 261  * Bit   Function                     Value
 262  * 0     Input/output                 1=input
 263  * 1     Polarity of signal           1=inverted
 264  * 2     Unused                       ??
 265  * 3     Function (normal or special) 1=special
 266  * 7-4   Unused
 267  *
 268  * SIO REG
 269  * 0xe0     CIO 10 Config
 270  * 0xe1     CIO 11 Config
 271  * 0xe2     CIO 12 Config
 272  * 0xe3     CIO 13 Config
 273  * 0xe4     CIO 14 Config
 274  * 0xe5     CIO 15 Config
 275  * 0xe6     CIO 16 Config
 276  * 0xe7     CIO 16 Config
 277  *
 278  * 0xe8     CIO 20 Config
 279  * 0xe9     CIO 21 Config
 280  * 0xea     CIO 22 Config
 281  * 0xeb     CIO 23 Config
 282  * 0xec     CIO 24 Config
 283  * 0xed     CIO 25 Config
 284  *
 285  * 0xf5     CIO 30 Config
 286  * 0xf6     CIO 31 Config
 287  * 0xf7     CIO 32 Config
 288  * 0xf8     CIO 33 Config
 289  * 0xf9     CIO 34 Config
 290  * 0xfa     CIO 35 Config
 291  * 0xfb     CIO 36 Config
 292  * 0xfc     CIO 37 Config
 293  *
 294  */
 295
 296 #define ALI_CIO_PORT_SEL 0x83
 297 #define ALI_CIO_INDEX    0xea
 298 #define ALI_CIO_DATA     0xeb
 299
 300 void ali512x_set_cio(int enabled)
 301 {
 302         int i;
 303
 304         ALI_OPEN();
 305
 306         if (enabled) {
 307                 ali_write(0x3, ALI_CIO_PORT_SEL);    /* Enable CIO data register */
 308         } else {
 309                 ali_write(0x3, ALI_CIO_PORT_SEL & ~0x80);
 310         }
 311
 312         ALI_SELDEV(8);
 313
 314         ali_write(0x30, enabled?1:0);
 315
 316         /* set all pins to input to start with */
 317         for (i=0xe0;i<0xee;i++) {
 318                 ali_write(i, 1);
 319         }
 320
 321         for (i=0xf5;i<0xfe;i++) {
 322                 ali_write(i, 1);
 323         }
 324
 325         ALI_CLOSE();
 326 }
 327
 328
 329 void ali512x_cio_function(int pin, int special, int inv, int input)
 330 {
 331         u8 data;
 332         u8 addr;
 333
 334         /* valid pins are 10-17, 20-25 and 30-37 */
 335         if (pin >= 10 && pin <= 17) {
 336                 addr = 0xe0+(pin&7);
 337         } else if (pin >= 20 && pin <= 25) {
 338                 addr = 0xe8+(pin&7);
 339         } else if (pin >= 30 && pin <= 37) {
 340                 addr = 0xf5+(pin&7);
 341         } else {
 342                 return;
 343         }
 344
 345         ALI_OPEN();
 346
 347         ALI_SELDEV(8);
 348
 349
 350         data=0xf4;
 351         if (special) {
 352                 data |= 0x08;
 353         } else {
 354                 if (inv) {
 355                         data |= 0x02;
 356                 }
 357                 if (input) {
 358                         data |= 0x01;
 359                 }
 360         }
 361
 362         ali_write(addr, data);
 363
 364         ALI_CLOSE();
 365 }
 366
 367 void ali512x_cio_out(int pin, int value)
 368 {
 369         u8 reg;
 370         u8 data;
 371         u8 bit;
 372
 373         reg = pin/10;
 374         bit = 1 << (pin%10);
 375
 376
 377         outb(reg, ALI_CIO_INDEX);     /* select I/O register */
 378         data = inb(ALI_CIO_DATA);
 379         if (value) {
 380                 data |= bit;
 381         } else {
 382                 data &= ~bit;
 383         }
 384         outb(data, ALI_CIO_DATA);
 385 }
 386
 387 int ali512x_cio_in(int pin)
 388 {
 389         u8 reg;
 390         u8 data;
 391         u8 bit;
 392
 393         /* valid pins are 10-17, 20-25 and 30-37 */
 394         reg = pin/10;
 395         bit = 1 << (pin%10);
 396
 397
 398         outb(reg, ALI_CIO_INDEX);     /* select I/O register */
 399         data = inb(ALI_CIO_DATA);
 400
 401         return data & bit;
 402 }