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-rw-r--r--drivers/misc/ali512x.c423
1 files changed, 423 insertions, 0 deletions
diff --git a/drivers/misc/ali512x.c b/drivers/misc/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 <config.h>
+
+#ifdef CONFIG_ALI152X
+
+#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);
+}
+
+#if 0
+static int ali_read(u8 index)
+{
+ outb(index, ALI_INDEX);
+ return inb(ALI_DATA);
+}
+#endif
+
+#define ALI_OPEN() \
+ outb(0x51, ALI_INDEX); \
+ outb(0x23, ALI_INDEX)
+
+
+#define ALI_CLOSE() \
+ outb(0xbb, ALI_INDEX)
+
+/* 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 an indirect address scheme.
+ *
+ * Reigster 3 in the SIO is used to select the index and data
+ * port addresses where the CIO I/O registers show up.
+ * The function selection registers are accessible under
+ * function SIO 8.
+ *
+ * SIO reigster 3 (CIO Address Selection) bit definitions:
+ * bit 7 CIO index and data registers enabled
+ * bit 1-0 CIO indirect registers port address 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 port and CIO data port
+ * 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
+ *
+ */
+
+#define ALI_CIO_PORT_SEL 0x83
+#define ALI_CIO_INDEX 0xea
+#define ALI_CIO_DATA 0xeb
+
+void ali512x_set_cio(int enabled)
+{
+ int i;
+
+ ALI_OPEN();
+
+ if (enabled) {
+ ali_write(0x3, ALI_CIO_PORT_SEL); /* Enable CIO data register */
+ } else {
+ ali_write(0x3, ALI_CIO_PORT_SEL & ~0x80);
+ }
+
+ 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&7);
+ } else if (pin >= 20 && pin <= 25) {
+ addr = 0xe8+(pin&7);
+ } else if (pin >= 30 && pin <= 37) {
+ addr = 0xf5+(pin&7);
+ } else {
+ return;
+ }
+
+ ALI_OPEN();
+
+ ALI_SELDEV(8);
+
+
+ data=0xf4;
+ 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;
+
+ reg = pin/10;
+ bit = 1 << (pin%10);
+
+
+ outb(reg, ALI_CIO_INDEX); /* select I/O register */
+ data = inb(ALI_CIO_DATA);
+ if (value) {
+ data |= bit;
+ } else {
+ data &= ~bit;
+ }
+ outb(data, ALI_CIO_DATA);
+}
+
+int ali512x_cio_in(int pin)
+{
+ u8 reg;
+ u8 data;
+ u8 bit;
+
+ /* valid pins are 10-17, 20-25 and 30-37 */
+ reg = pin/10;
+ bit = 1 << (pin%10);
+
+
+ outb(reg, ALI_CIO_INDEX); /* select I/O register */
+ data = inb(ALI_CIO_DATA);
+
+ return data & bit;
+}
+
+
+#endif
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