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