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-rw-r--r--lib_i386/ic/ali512x.c442
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diff --git a/lib_i386/ic/ali512x.c b/lib_i386/ic/ali512x.c
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-/*
- * (C) Copyright 2002
- * Daniel Engström, Omicron Ceti AB <daniel@omicron.se>.
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-/*
- * Based on sc520cdp.c from rolo 1.6:
- *----------------------------------------------------------------------
- * (C) Copyright 2000
- * Sysgo Real-Time Solutions GmbH
- * Klein-Winternheim, Germany
- *----------------------------------------------------------------------
- */
-
-#include <common.h>
-#include <asm/io.h>
-#include <asm/ic/ali512x.h>
-
-
-/* ALI M5123 Logical device numbers:
- * 0 FDC
- * 1 unused?
- * 2 unused?
- * 3 lpt
- * 4 UART1
- * 5 UART2
- * 6 RTC
- * 7 mouse/kbd
- * 8 CIO
- */
-
-/*
- ************************************************************
- * Some access primitives for the ALi chip: *
- ************************************************************
- */
-
-static void ali_write(u8 index, u8 value)
-{
- /* write an arbirary register */
- outb(index, ALI_INDEX);
- outb(value, ALI_DATA);
-}
-
-static int ali_read(u8 index)
-{
- outb(index, ALI_INDEX);
- return inb(ALI_DATA);
-}
-
-#define ALI_OPEN() \
- outb(0x51, ALI_DATA); \
- outb(0x23, ALI_DATA)
-
-
-#define ALI_CLOSE() \
- outb(0xbb, ALI_DATA)
-
-/* Select a logical device */
-#define ALI_SELDEV(dev) \
- ali_write(0x07, dev)
-
-
-void ali512x_init(void)
-{
- ALI_OPEN();
-
- ali_write(0x02, 0x01); /* soft reset */
- ali_write(0x03, 0x03); /* disable access to CIOs */
- ali_write(0x22, 0x00); /* disable direct powerdown */
- ali_write(0x23, 0x00); /* disable auto powerdown */
- ali_write(0x24, 0x00); /* IR 8 is active hi, pin26 is PDIR */
-
- ALI_CLOSE();
-}
-
-void ali512x_set_fdc(int enabled, u16 io, u8 irq, u8 dma_channel)
-{
- ALI_OPEN();
- ALI_SELDEV(0);
-
- ali_write(0x30, enabled?1:0);
- if (enabled) {
- ali_write(0x60, io >> 8);
- ali_write(0x61, io & 0xff);
- ali_write(0x70, irq);
- ali_write(0x74, dma_channel);
-
- /* AT mode, no drive swap */
- ali_write(0xf0, 0x08);
- ali_write(0xf1, 0x00);
- ali_write(0xf2, 0xff);
- ali_write(0xf4, 0x00);
- }
- ALI_CLOSE();
-}
-
-
-void ali512x_set_pp(int enabled, u16 io, u8 irq, u8 dma_channel)
-{
- ALI_OPEN();
- ALI_SELDEV(3);
-
- ali_write(0x30, enabled?1:0);
- if (enabled) {
- ali_write(0x60, io >> 8);
- ali_write(0x61, io & 0xff);
- ali_write(0x70, irq);
- ali_write(0x74, dma_channel);
-
- /* mode: EPP 1.9, ECP FIFO threshold = 7, IRQ active low */
- ali_write(0xf0, 0xbc);
- /* 12 MHz, Burst DMA in ECP */
- ali_write(0xf1, 0x05);
- }
- ALI_CLOSE();
-
-}
-
-void ali512x_set_uart(int enabled, int index, u16 io, u8 irq)
-{
- ALI_OPEN();
- ALI_SELDEV(index?5:4);
-
- ali_write(0x30, enabled?1:0);
- if (enabled) {
- ali_write(0x60, io >> 8);
- ali_write(0x61, io & 0xff);
- ali_write(0x70, irq);
-
- ali_write(0xf0, 0x00);
- ali_write(0xf1, 0x00);
-
- /* huh? write 0xf2 twice - a typo in rolo
- * or some secret ali errata? Who knows?
- */
- if (index) {
- ali_write(0xf2, 0x00);
- }
- ali_write(0xf2, 0x0c);
- }
- ALI_CLOSE();
-
-}
-
-void ali512x_set_uart2_irda(int enabled)
-{
- ALI_OPEN();
- ALI_SELDEV(5);
-
- ali_write(0xf1, enabled?0x48:0x00); /* fullduplex IrDa */
- ALI_CLOSE();
-
-}
-
-void ali512x_set_rtc(int enabled, u16 io, u8 irq)
-{
- ALI_OPEN();
- ALI_SELDEV(6);
-
- ali_write(0x30, enabled?1:0);
- if (enabled) {
- ali_write(0x60, io >> 8);
- ali_write(0x61, io & 0xff);
- ali_write(0x70, irq);
-
- ali_write(0xf0, 0x00);
- }
- ALI_CLOSE();
-}
-
-void ali512x_set_kbc(int enabled, u8 kbc_irq, u8 mouse_irq)
-{
- ALI_OPEN();
- ALI_SELDEV(7);
-
- ali_write(0x30, enabled?1:0);
- if (enabled) {
- ali_write(0x70, kbc_irq);
- ali_write(0x72, mouse_irq);
-
- ali_write(0xf0, 0x00);
- }
- ALI_CLOSE();
-}
-
-
-/* Common I/O
- *
- * (This descripotsion is base on several incompete sources
- * since I have not been able to obtain any datasheet for the device
- * there may be some mis-understandings burried in here.
- * -- Daniel daniel@omicron.se)
- *
- * There are 22 CIO pins numbered
- * 10-17
- * 20-25
- * 30-37
- *
- * 20-24 are dedicated CIO pins, the other 17 are muliplexed with
- * other functions.
- *
- * Secondary
- * CIO Pin Function Decription
- * =======================================================
- * CIO10 IRQIN1 Interrupt input 1?
- * CIO11 IRQIN2 Interrupt input 2?
- * CIO12 IRRX IrDa Receive
- * CIO13 IRTX IrDa Transmit
- * CIO14 P21 KBC P21 fucntion
- * CIO15 P20 KBC P21 fucntion
- * CIO16 I2C_CLK I2C Clock
- * CIO17 I2C_DAT I2C Data
- *
- * CIO20 -
- * CIO21 -
- * CIO22 -
- * CIO23 -
- * CIO24 -
- * CIO25 LOCK Keylock
- *
- * CIO30 KBC_CLK Keybaord Clock
- * CIO31 CS0J General Chip Select decoder CS0J
- * CIO32 CS1J General Chip Select decoder CS1J
- * CIO33 ALT_KCLK Alternative Keyboard Clock
- * CIO34 ALT_KDAT Alternative Keyboard Data
- * CIO35 ALT_MCLK Alternative Mouse Clock
- * CIO36 ALT_MDAT Alternative Mouse Data
- * CIO37 ALT_KBC Alternative KBC select
- *
- * The CIO use a double indirect address scheme.
- *
- * Reigster 3 in the SIO is used to selectg where the CIO
- * I/O registers show up under function 8. Note that these
- * registers clash with the CIO function select regsters,
- * below.
- *
- * SIO reigster 3 (CIO Address Selection) bit definitions:
- * bit 7 CIO data register enabled
- * bit 1-0 CIO indirect registers select
- * 0 index = 0xE0 data = 0xE1
- * 1 index = 0xE2 data = 0xE3
- * 2 index = 0xE4 data = 0xE5
- * 3 index = 0xEA data = 0xEB
- *
- * There are three CIO I/O register accessed via CIO index and CIO data
- * 0x01 CIO 10-17 data
- * 0x02 CIO 20-25 data (bits 7-6 unused)
- * 0x03 CIO 30-37 data
- *
- *
- * The pin function is accessed through normal
- * SIO registers, each register have the same format:
- *
- * Bit Function Value
- * 0 Input/output 1=input
- * 1 Polarity of signal 1=inverted
- * 2 Unused ??
- * 3 Function (normal or special) 1=special
- * 7-4 Unused
- *
- * SIO REG
- * 0xe0 CIO 10 Config
- * 0xe1 CIO 11 Config
- * 0xe2 CIO 12 Config
- * 0xe3 CIO 13 Config
- * 0xe4 CIO 14 Config
- * 0xe5 CIO 15 Config
- * 0xe6 CIO 16 Config
- * 0xe7 CIO 16 Config
- *
- * 0xe8 CIO 20 Config
- * 0xe9 CIO 21 Config
- * 0xea CIO 22 Config
- * 0xeb CIO 23 Config
- * 0xec CIO 24 Config
- * 0xed CIO 25 Config
- *
- * 0xf5 CIO 30 Config
- * 0xf6 CIO 31 Config
- * 0xf7 CIO 32 Config
- * 0xf8 CIO 33 Config
- * 0xf9 CIO 34 Config
- * 0xfa CIO 35 Config
- * 0xfb CIO 36 Config
- * 0xfc CIO 37 Config
- *
- */
-
-void ali512x_set_cio(int enabled)
-{
- int i;
-
- ALI_OPEN();
- ali_write(0x3, 3); /* Disable CIO data register */
-
- ALI_SELDEV(8);
- ali_write(0x30, enabled?1:0);
-
- /* set all pins to input to start with */
- for (i=0xe0;i<0xee;i++) {
- ali_write(i, 1);
- }
- for (i=0xf5;i<0xfe;i++) {
- ali_write(i, 1);
- }
-
- ALI_CLOSE();
-}
-
-void ali512x_cio_function(int pin, int special, int inv, int input)
-{
- u8 data;
- u8 addr;
-
-
- /* valid pins are 10-17, 20-25 and 30-37 */
- if (pin >= 10 && pin <= 17) {
- addr = 0xe0+(pin-10);
- } else if (pin >= 20 && pin <= 25) {
- addr = 0xe8+(pin-20);
- } else if (pin >= 30 && pin <= 37) {
- addr = 0xf5+(pin-30);
- } else {
- return;
- }
-
- ALI_OPEN();
- ALI_SELDEV(8);
-
- ali_write(0x03, 0x03); /* Disable CIO data register */
-
- data=0;
- if (special) {
- data |= 0x08;
- } else {
- if (inv) {
- data |= 0x02;
- }
- if (input) {
- data |= 0x01;
- }
- }
-
- ali_write(addr, data);
-
- ALI_CLOSE();
-}
-
-void ali512x_cio_out(int pin, int value)
-{
- u8 reg;
- u8 data;
- u8 bit;
-
- /* valid pins are 10-17, 20-25 and 30-37 */
- if (pin >= 10 && pin <= 17) {
- reg = 1;
- pin -= 10;
- } else if (pin >= 20 && pin <= 25) {
- reg = 2;
- pin -= 20;
- } else if (pin >= 30 && pin <= 37) {
- reg = 3;
- pin -= 30;
- } else {
- return;
- }
- bit = 1 << pin;
-
- ALI_OPEN();
- ALI_SELDEV(8);
-
- ali_write(0x03, 0x83); /* Enable CIO data register, use data port at 0xea */
-
- ali_write(0xea, reg); /* select I/O register */
- data = ali_read(0xeb);
- if (value) {
- data |= bit;
- } else {
- data &= ~bit;
- }
- ali_write(0xeb, data);
- ali_write(0xea, 0); /* select register 0 */
- ali_write(0x03, 0x03); /* Disable CIO data register */
- ALI_CLOSE();
-}
-
-int ali512x_cio_in(int pin)
-{
- u8 reg;
- u8 data;
- u8 bit;
-
- /* valid pins are 10-17, 20-25 and 30-37 */
- if (pin >= 10 && pin <= 17) {
- reg = 1;
- pin -= 10;
- } else if (pin >= 20 && pin <= 25) {
- reg = 2;
- pin -= 20;
- } else if (pin >= 30 && pin <= 37) {
- reg = 3;
- pin -= 30;
- } else {
- return -1;
- }
- bit = 1 << pin;
-
- ALI_OPEN();
- ALI_SELDEV(8);
-
- ali_write(0x03, 0x83); /* Enable CIO data register, use data port at 0xea */
-
- ali_write(0xea, reg); /* select I/O register */
- data = ali_read(0xeb);
- ali_write(0xea, 0); /* select register 0 */
- ali_write(0x03, 0x03); /* Disable CIO data register */
- ALI_CLOSE();
-
- return data & bit;
-}
-
-
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