4801driver.h

arm 平台下 linux gpio 的驱动

/*
 **********************************************************************
 * 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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 **********************************************************************

Soekris Net48xx GPIO driver
Provides basic control (read and write) over the 12 general purpose
IO-pins of the Soekris Net4801 and the error-led (which happens to
be connected to another general purpose IO pin)

  (c) Copyright 2003-2004   Martin Hejl <[e-mail]>
                            G&H Softwareentwicklung GmbH

*/

#ifndef __4801GPIO_H__
#define __4801GPIO_H__


#define __NO_VERSION__      /* This isn't "the" file 
                             * of the kernel module */
#include "common.h"							 
#include <linux/version.h>   /* Not included by 
                              * module.h because 
                              * of the __NO_VERSION__ */

/* 12 gpio pins  */
#define NUMBER_OF_PINS 12

#define SC1100_VENDOR_ID     0x100B
#define SC1100_F0_DEVICE_ID  0x0510

/* ofset to use if we can't find the SIO at 0x2E */
#define SIO_BASE_OFFSET 0x20

/* defines for IO-Addresses/offsets */
#define SIO_GPIO_BANK0_OUT sio_gpio_base
#define SIO_GPIO_BANK1_OUT sio_gpio_base+0x4
#define SIO_GPIO_BANK2_OUT sio_gpio_base+0x8

#define SIO_GPIO_BANK0_IN sio_gpio_base + 1
#define SIO_GPIO_BANK1_IN sio_gpio_base+0x5
#define SIO_GPIO_BANK2_IN sio_gpio_base+0x9

#define SIO_INDEX    (0x2E + offset_87336)
#define SIO_DATA     (0x2f + offset_87336)

#define SIO_TMS_BANKS 3	 /* number of temperature sensors*/
#define SIO_TMSCFG  0x08 /* offset of TMS Configuration */
#define SIO_TMSBS   0x09 /* offset of TMS Bank Select */
#define SIO_TCHCFST 0x0A /* offset Temperature Channel Configuration and Status */
#define SIO_RDCHT   0x0B /* offset Read Channel Temperature */

#define SIO_LVM_BANKS 14 /* number of voltage monitors*/
#define SIO_VCNVR   0x07 /* offset of Voltage Conversion Rate */
#define SIO_VLMCFG  0x08 /* offset VLM Configuration */
#define SIO_VLMBS   0x09 /* offset VLM Bank Select */
#define SIO_VCHCFST 0x0A /* offset Voltage Channel Configuration and Status */
#define SIO_RDCHV   0x0B /* offset Read Channel Voltage */

#define SIO_LVM_VREF 1235

#define SIO_DEV_SEL   0x7
#define SIO_DEV_ENB   0x30
#define SIO_GPIO_DEV  0x7
#define SIO_VLM_DEV   0x0D
#define SIO_TMS_DEV   0x0E

#define SIO_BASE_LADDR 0x61
#define SIO_BASE_HADDR 0x60
#define SIO_GPIO_PIN_SELECT    0xF0
#define SIO_GPIO_PIN_CONFIGURE 0xF1

#define PRECISION 100

#define CONFIG_GPIO_INPUT   0x04
#define CONFIG_GPIO_OUTPUT  0x03
#define SIO_SID       0x20    /* SuperI/O ID Register */
#define SIO_SID_VALUE 0xe9    /* Expected value in SuperI/O ID Register */

#define GEODE_GPIO_SIZE 0x2c  /* Size of GPIO register block */
#define GEODE_GPIO_DATA_IN 0x04
#define GEODE_GPIO_DATA_OUT 0x00

static unsigned short int sio_gpio_base=0;
static unsigned short int sio_tms_base=0;
static unsigned short int sio_vlm_base=0;
static unsigned short int geode_gpio_base=0;
static unsigned short int offset_87336=0;

/*

Pin assignment of the Net4801 GPIOs (connected to the 87226 GPIO pins
and _NOT_ to the GPIO pins of the GEODE processor)

                     +----+----+
               3,3 V |  1 |  2 | 5 V
                     +----+----+
GPIO0   Port 2 Bit 0 |  3 |  4 | Port 2 Bit 1   GPIO1
                     +----+----+
GPIO2   Port 2 Bit 2 |  5 |  6 | Port 2 Bit 3   GPIO3
                     +----+----+
GPIO4   Port 2 Bit 4 |  7 |  8 | Port 2 Bit 5   GPIO5
                     +----+----+
GPIO6   Port 2 Bit 6 |  9 | 10 | Port 2 Bit 7   GPIO7
                     +----+----+
                 GND | 11 | 12 | Port 0 Bit 4   GPIO8
                     +----+----+
GPIO9   Port 0 Bit 5 | 13 | 14 | GND
                     +----+----+
GPIO10  Port 1 Bit 3 | 15 | 16 | Port 1 Bit 2   GPIO11
                     +----+----+
                 GND | 17 | 18 | unknown (docs say GND, but is 3.3V on my box)
                     +----+----+
                 TXD | 19 | 20 | RXD
                     +----+----+

Error_LED => GEODE GPIO20

*/

#endif