drivers/misc/ali512x.c - uboot/armada - Git at Google

 /*
  * (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>

 #include <common.h>
 #include <asm/io.h>
 #include <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;
 }
	/*
	* (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>

	#include <common.h>
	#include <asm/io.h>
	#include <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;
	}