1 /* 2 * (C) Copyright 2002 3 * Daniel Engström, Omicron Ceti AB <daniel@omicron.se>. 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 /* 25 * Based on sc520cdp.c from rolo 1.6: 26 *---------------------------------------------------------------------- 27 * (C) Copyright 2000 28 * Sysgo Real-Time Solutions GmbH 29 * Klein-Winternheim, Germany 30 *---------------------------------------------------------------------- 31 */ 32 33 #include <config.h> 34 35 #include <common.h> 36 #include <asm/io.h> 37 #include <ali512x.h> 38 39 40 /* ALI M5123 Logical device numbers: 41 * 0 FDC 42 * 1 unused? 43 * 2 unused? 44 * 3 lpt 45 * 4 UART1 46 * 5 UART2 47 * 6 RTC 48 * 7 mouse/kbd 49 * 8 CIO 50 */ 51 52 /* 53 ************************************************************ 54 * Some access primitives for the ALi chip: * 55 ************************************************************ 56 */ 57 58 static void ali_write(u8 index, u8 value) 59 { 60 /* write an arbirary register */ 61 outb(index, ALI_INDEX); 62 outb(value, ALI_DATA); 63 } 64 65 #if 0 66 static int ali_read(u8 index) 67 { 68 outb(index, ALI_INDEX); 69 return inb(ALI_DATA); 70 } 71 #endif 72 73 #define ALI_OPEN() \ 74 outb(0x51, ALI_INDEX); \ 75 outb(0x23, ALI_INDEX) 76 77 78 #define ALI_CLOSE() \ 79 outb(0xbb, ALI_INDEX) 80 81 /* Select a logical device */ 82 #define ALI_SELDEV(dev) \ 83 ali_write(0x07, dev) 84 85 86 void ali512x_init(void) 87 { 88 ALI_OPEN(); 89 90 ali_write(0x02, 0x01); /* soft reset */ 91 ali_write(0x03, 0x03); /* disable access to CIOs */ 92 ali_write(0x22, 0x00); /* disable direct powerdown */ 93 ali_write(0x23, 0x00); /* disable auto powerdown */ 94 ali_write(0x24, 0x00); /* IR 8 is active hi, pin26 is PDIR */ 95 96 ALI_CLOSE(); 97 } 98 99 void ali512x_set_fdc(int enabled, u16 io, u8 irq, u8 dma_channel) 100 { 101 ALI_OPEN(); 102 ALI_SELDEV(0); 103 104 ali_write(0x30, enabled?1:0); 105 if (enabled) { 106 ali_write(0x60, io >> 8); 107 ali_write(0x61, io & 0xff); 108 ali_write(0x70, irq); 109 ali_write(0x74, dma_channel); 110 111 /* AT mode, no drive swap */ 112 ali_write(0xf0, 0x08); 113 ali_write(0xf1, 0x00); 114 ali_write(0xf2, 0xff); 115 ali_write(0xf4, 0x00); 116 } 117 ALI_CLOSE(); 118 } 119 120 121 void ali512x_set_pp(int enabled, u16 io, u8 irq, u8 dma_channel) 122 { 123 ALI_OPEN(); 124 ALI_SELDEV(3); 125 126 ali_write(0x30, enabled?1:0); 127 if (enabled) { 128 ali_write(0x60, io >> 8); 129 ali_write(0x61, io & 0xff); 130 ali_write(0x70, irq); 131 ali_write(0x74, dma_channel); 132 133 /* mode: EPP 1.9, ECP FIFO threshold = 7, IRQ active low */ 134 ali_write(0xf0, 0xbc); 135 /* 12 MHz, Burst DMA in ECP */ 136 ali_write(0xf1, 0x05); 137 } 138 ALI_CLOSE(); 139 140 } 141 142 void ali512x_set_uart(int enabled, int index, u16 io, u8 irq) 143 { 144 ALI_OPEN(); 145 ALI_SELDEV(index?5:4); 146 147 ali_write(0x30, enabled?1:0); 148 if (enabled) { 149 ali_write(0x60, io >> 8); 150 ali_write(0x61, io & 0xff); 151 ali_write(0x70, irq); 152 153 ali_write(0xf0, 0x00); 154 ali_write(0xf1, 0x00); 155 156 /* huh? write 0xf2 twice - a typo in rolo 157 * or some secret ali errata? Who knows? 158 */ 159 if (index) { 160 ali_write(0xf2, 0x00); 161 } 162 ali_write(0xf2, 0x0c); 163 } 164 ALI_CLOSE(); 165 166 } 167 168 void ali512x_set_uart2_irda(int enabled) 169 { 170 ALI_OPEN(); 171 ALI_SELDEV(5); 172 173 ali_write(0xf1, enabled?0x48:0x00); /* fullduplex IrDa */ 174 ALI_CLOSE(); 175 176 } 177 178 void ali512x_set_rtc(int enabled, u16 io, u8 irq) 179 { 180 ALI_OPEN(); 181 ALI_SELDEV(6); 182 183 ali_write(0x30, enabled?1:0); 184 if (enabled) { 185 ali_write(0x60, io >> 8); 186 ali_write(0x61, io & 0xff); 187 ali_write(0x70, irq); 188 189 ali_write(0xf0, 0x00); 190 } 191 ALI_CLOSE(); 192 } 193 194 void ali512x_set_kbc(int enabled, u8 kbc_irq, u8 mouse_irq) 195 { 196 ALI_OPEN(); 197 ALI_SELDEV(7); 198 199 ali_write(0x30, enabled?1:0); 200 if (enabled) { 201 ali_write(0x70, kbc_irq); 202 ali_write(0x72, mouse_irq); 203 204 ali_write(0xf0, 0x00); 205 } 206 ALI_CLOSE(); 207 } 208 209 210 /* Common I/O 211 * 212 * (This descripotsion is base on several incompete sources 213 * since I have not been able to obtain any datasheet for the device 214 * there may be some mis-understandings burried in here. 215 * -- Daniel daniel@omicron.se) 216 * 217 * There are 22 CIO pins numbered 218 * 10-17 219 * 20-25 220 * 30-37 221 * 222 * 20-24 are dedicated CIO pins, the other 17 are muliplexed with 223 * other functions. 224 * 225 * Secondary 226 * CIO Pin Function Decription 227 * ======================================================= 228 * CIO10 IRQIN1 Interrupt input 1? 229 * CIO11 IRQIN2 Interrupt input 2? 230 * CIO12 IRRX IrDa Receive 231 * CIO13 IRTX IrDa Transmit 232 * CIO14 P21 KBC P21 fucntion 233 * CIO15 P20 KBC P21 fucntion 234 * CIO16 I2C_CLK I2C Clock 235 * CIO17 I2C_DAT I2C Data 236 * 237 * CIO20 - 238 * CIO21 - 239 * CIO22 - 240 * CIO23 - 241 * CIO24 - 242 * CIO25 LOCK Keylock 243 * 244 * CIO30 KBC_CLK Keybaord Clock 245 * CIO31 CS0J General Chip Select decoder CS0J 246 * CIO32 CS1J General Chip Select decoder CS1J 247 * CIO33 ALT_KCLK Alternative Keyboard Clock 248 * CIO34 ALT_KDAT Alternative Keyboard Data 249 * CIO35 ALT_MCLK Alternative Mouse Clock 250 * CIO36 ALT_MDAT Alternative Mouse Data 251 * CIO37 ALT_KBC Alternative KBC select 252 * 253 * The CIO use an indirect address scheme. 254 * 255 * Reigster 3 in the SIO is used to select the index and data 256 * port addresses where the CIO I/O registers show up. 257 * The function selection registers are accessible under 258 * function SIO 8. 259 * 260 * SIO reigster 3 (CIO Address Selection) bit definitions: 261 * bit 7 CIO index and data registers enabled 262 * bit 1-0 CIO indirect registers port address select 263 * 0 index = 0xE0 data = 0xE1 264 * 1 index = 0xE2 data = 0xE3 265 * 2 index = 0xE4 data = 0xE5 266 * 3 index = 0xEA data = 0xEB 267 * 268 * There are three CIO I/O register accessed via CIO index port and CIO data port 269 * 0x01 CIO 10-17 data 270 * 0x02 CIO 20-25 data (bits 7-6 unused) 271 * 0x03 CIO 30-37 data 272 * 273 * 274 * The pin function is accessed through normal 275 * SIO registers, each register have the same format: 276 * 277 * Bit Function Value 278 * 0 Input/output 1=input 279 * 1 Polarity of signal 1=inverted 280 * 2 Unused ?? 281 * 3 Function (normal or special) 1=special 282 * 7-4 Unused 283 * 284 * SIO REG 285 * 0xe0 CIO 10 Config 286 * 0xe1 CIO 11 Config 287 * 0xe2 CIO 12 Config 288 * 0xe3 CIO 13 Config 289 * 0xe4 CIO 14 Config 290 * 0xe5 CIO 15 Config 291 * 0xe6 CIO 16 Config 292 * 0xe7 CIO 16 Config 293 * 294 * 0xe8 CIO 20 Config 295 * 0xe9 CIO 21 Config 296 * 0xea CIO 22 Config 297 * 0xeb CIO 23 Config 298 * 0xec CIO 24 Config 299 * 0xed CIO 25 Config 300 * 301 * 0xf5 CIO 30 Config 302 * 0xf6 CIO 31 Config 303 * 0xf7 CIO 32 Config 304 * 0xf8 CIO 33 Config 305 * 0xf9 CIO 34 Config 306 * 0xfa CIO 35 Config 307 * 0xfb CIO 36 Config 308 * 0xfc CIO 37 Config 309 * 310 */ 311 312 #define ALI_CIO_PORT_SEL 0x83 313 #define ALI_CIO_INDEX 0xea 314 #define ALI_CIO_DATA 0xeb 315 316 void ali512x_set_cio(int enabled) 317 { 318 int i; 319 320 ALI_OPEN(); 321 322 if (enabled) { 323 ali_write(0x3, ALI_CIO_PORT_SEL); /* Enable CIO data register */ 324 } else { 325 ali_write(0x3, ALI_CIO_PORT_SEL & ~0x80); 326 } 327 328 ALI_SELDEV(8); 329 330 ali_write(0x30, enabled?1:0); 331 332 /* set all pins to input to start with */ 333 for (i=0xe0;i<0xee;i++) { 334 ali_write(i, 1); 335 } 336 337 for (i=0xf5;i<0xfe;i++) { 338 ali_write(i, 1); 339 } 340 341 ALI_CLOSE(); 342 } 343 344 345 void ali512x_cio_function(int pin, int special, int inv, int input) 346 { 347 u8 data; 348 u8 addr; 349 350 /* valid pins are 10-17, 20-25 and 30-37 */ 351 if (pin >= 10 && pin <= 17) { 352 addr = 0xe0+(pin&7); 353 } else if (pin >= 20 && pin <= 25) { 354 addr = 0xe8+(pin&7); 355 } else if (pin >= 30 && pin <= 37) { 356 addr = 0xf5+(pin&7); 357 } else { 358 return; 359 } 360 361 ALI_OPEN(); 362 363 ALI_SELDEV(8); 364 365 366 data=0xf4; 367 if (special) { 368 data |= 0x08; 369 } else { 370 if (inv) { 371 data |= 0x02; 372 } 373 if (input) { 374 data |= 0x01; 375 } 376 } 377 378 ali_write(addr, data); 379 380 ALI_CLOSE(); 381 } 382 383 void ali512x_cio_out(int pin, int value) 384 { 385 u8 reg; 386 u8 data; 387 u8 bit; 388 389 reg = pin/10; 390 bit = 1 << (pin%10); 391 392 393 outb(reg, ALI_CIO_INDEX); /* select I/O register */ 394 data = inb(ALI_CIO_DATA); 395 if (value) { 396 data |= bit; 397 } else { 398 data &= ~bit; 399 } 400 outb(data, ALI_CIO_DATA); 401 } 402 403 int ali512x_cio_in(int pin) 404 { 405 u8 reg; 406 u8 data; 407 u8 bit; 408 409 /* valid pins are 10-17, 20-25 and 30-37 */ 410 reg = pin/10; 411 bit = 1 << (pin%10); 412 413 414 outb(reg, ALI_CIO_INDEX); /* select I/O register */ 415 data = inb(ALI_CIO_DATA); 416 417 return data & bit; 418 } 419