* Patch by Daniel Engström, 13 Nov 2002:

  Add support for i386 architecture and AMD SC520 board

* Patch by Pierre Aubert, 12 Nov 2002:
  Add support for DOS filesystem and booting from DOS floppy disk

1 files changed, 442 insertions, 0 deletions

diff --git a/lib_i386/ic/ali512x.c b/lib_i386/ic/ali512x.c
new file mode 100644
index 0000000..4537095
--- /dev/null
+++ b/lib_i386/ic/ali512x.c
@@ -0,0 +1,442 @@
+/*
+ * (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; 
+}
+
+