875 lines
20 KiB
C
875 lines
20 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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*
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* Copyright (C) 2005 infineon
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* Copyright (C) 2007 John Crispin <blogic@openwrt.org>
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*
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/proc_fs.h>
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#include <linux/init.h>
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#include <linux/ioctl.h>
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#include <asm/semaphore.h>
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#include <asm/uaccess.h>
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#include <asm/danube/danube.h>
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#include <asm/danube/danube_ioctl.h>
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#define DANUBE_PORT_OUT_REG 0x00000010
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#define DANUBE_PORT_IN_REG 0x00000014
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#define DANUBE_PORT_DIR_REG 0x00000018
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#define DANUBE_PORT_ALTSEL0_REG 0x0000001C
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#define DANUBE_PORT_ALTSEL1_REG 0x00000020
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#define DANUBE_PORT_OD_REG 0x00000024
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#define DANUBE_PORT_STOFF_REG 0x00000028
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#define DANUBE_PORT_PUDSEL_REG 0x0000002C
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#define DANUBE_PORT_PUDEN_REG 0x00000030
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#define PORT_MODULE_ID 0xff
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#define PORT_WRITE_REG(reg, value) \
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*((volatile u32*)(reg)) = (u32)value;
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#define PORT_READ_REG(reg, value) \
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value = (u32)*((volatile u32*)(reg));
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#define PORT_IOC_CALL(ret,port,pin,func) \
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ret=danube_port_reserve_pin(port,pin,PORT_MODULE_ID); \
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if (ret == 0) ret=func(port,pin,PORT_MODULE_ID); \
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if (ret == 0) ret=danube_port_free_pin(port,pin,PORT_MODULE_ID);
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#define MAX_PORTS 2 // Number of ports in system
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#define PINS_PER_PORT 16 // Number of available pins per port
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static int port_major = 0;
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static int danube_port_pin_usage[MAX_PORTS][PINS_PER_PORT]; // Map for pin usage
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static u32 danube_port_bases[MAX_PORTS]
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= { DANUBE_GPIO_BASE_ADDR, DANUBE_GPIO_P0_PUDEN };
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static struct semaphore port_sem;
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int
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danube_port_reserve_pin (int port, int pin, int module_id)
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{
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] == 0) {
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danube_port_pin_usage[port][pin] = module_id;
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}
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else {
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return -EBUSY;
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}
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return 0;
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}
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int
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danube_port_free_pin (int port, int pin, int module_id)
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{
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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danube_port_pin_usage[port][pin] = 0;
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return 0;
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}
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int
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danube_port_set_open_drain (int port, int pin, int module_id)
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{
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u32 reg;
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_OD_REG, reg);
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reg |= (1 << pin);
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PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_OD_REG, reg);
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return 0;
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}
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int
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danube_port_clear_open_drain (int port, int pin, int module_id)
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{
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u32 reg;
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_OD_REG, reg);
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reg &= ~(1 << pin);
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PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_OD_REG, reg);
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return 0;
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}
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int
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danube_port_set_pudsel (int port, int pin, int module_id)
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{
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u32 reg;
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_PUDSEL_REG, reg);
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reg |= (1 << pin);
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PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_PUDSEL_REG,
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reg);
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return 0;
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}
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int
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danube_port_clear_pudsel (int port, int pin, int module_id)
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{
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u32 reg;
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_PUDSEL_REG, reg);
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reg &= ~(1 << pin);
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PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_PUDSEL_REG,
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reg);
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return 0;
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}
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int
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danube_port_set_puden (int port, int pin, int module_id)
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{
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u32 reg;
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_PUDEN_REG, reg);
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reg |= (1 << pin);
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PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_PUDEN_REG, reg);
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return 0;
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}
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int
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danube_port_clear_puden (int port, int pin, int module_id)
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{
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u32 reg;
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_PUDEN_REG, reg);
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reg &= ~(1 << pin);
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PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_PUDEN_REG, reg);
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return 0;
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}
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int
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danube_port_set_stoff (int port, int pin, int module_id)
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{
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u32 reg;
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_STOFF_REG, reg);
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reg |= (1 << pin);
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PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_STOFF_REG, reg);
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return 0;
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}
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int
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danube_port_clear_stoff (int port, int pin, int module_id)
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{
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u32 reg;
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_STOFF_REG, reg);
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reg &= ~(1 << pin);
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PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_STOFF_REG, reg);
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return 0;
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}
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int
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danube_port_set_dir_out (int port, int pin, int module_id)
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{
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u32 reg;
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_DIR_REG, reg);
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reg |= (1 << pin);
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PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_DIR_REG, reg);
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return 0;
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}
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int
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danube_port_set_dir_in (int port, int pin, int module_id)
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{
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u32 reg;
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_DIR_REG, reg);
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reg &= ~(1 << pin);
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PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_DIR_REG, reg);
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return 0;
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}
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int
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danube_port_set_output (int port, int pin, int module_id)
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{
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u32 reg;
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_OUT_REG, reg);
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reg |= (1 << pin);
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PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_OUT_REG, reg);
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return 0;
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}
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int
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danube_port_clear_output (int port, int pin, int module_id)
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{
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u32 reg;
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_OUT_REG, reg);
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reg &= ~(1 << pin);
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PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_OUT_REG, reg);
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return 0;
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}
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int
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danube_port_get_input (int port, int pin, int module_id)
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{
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u32 reg;
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_IN_REG, reg);
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reg &= (1 << pin);
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if (reg == 0x00)
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return 0;
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else
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return 1;
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}
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int
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danube_port_set_altsel0 (int port, int pin, int module_id)
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{
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u32 reg;
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL0_REG,
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reg);
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reg |= (1 << pin);
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PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL0_REG,
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reg);
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return 0;
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}
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int
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danube_port_clear_altsel0 (int port, int pin, int module_id)
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{
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u32 reg;
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL0_REG,
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reg);
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reg &= ~(1 << pin);
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PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL0_REG,
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reg);
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return 0;
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}
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int
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danube_port_set_altsel1 (int port, int pin, int module_id)
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{
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u32 reg;
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL1_REG,
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reg);
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reg |= (1 << pin);
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PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL1_REG,
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reg);
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return 0;
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}
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int
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danube_port_clear_altsel1 (int port, int pin, int module_id)
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{
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u32 reg;
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if (port < 0 || pin < 0)
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return -EINVAL;
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if (port > MAX_PORTS || pin > PINS_PER_PORT)
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return -EINVAL;
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if (danube_port_pin_usage[port][pin] != module_id)
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return -EBUSY;
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PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL1_REG,
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reg);
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reg &= ~(1 << pin);
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PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL1_REG,
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reg);
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return 0;
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}
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int
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danube_port_read_procmem (char *buf, char **start, off_t offset, int count,
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int *eof, void *data)
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{
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long len = 0;
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int t = 0;
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u32 bit = 0;
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u32 reg = 0;
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len = sprintf (buf, "\nDanube Port Settings\n");
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len = len + sprintf (buf + len,
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" 3 2 1 0\n");
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len = len + sprintf (buf + len,
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" 10987654321098765432109876543210\n");
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len = len + sprintf (buf + len,
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"----------------------------------------\n");
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len = len + sprintf (buf + len, "\nP0-OUT: ");
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PORT_READ_REG (DANUBE_GPIO_P0_OUT, reg);
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bit = 0x80000000;
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for (t = 0; t < 32; t++) {
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if ((reg & bit) > 0)
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len = len + sprintf (buf + len, "X");
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else
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len = len + sprintf (buf + len, " ");
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bit = bit >> 1;
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}
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len = len + sprintf (buf + len, "\nP1-OUT: ");
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PORT_READ_REG (DANUBE_GPIO_P1_OUT, reg);
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bit = 0x80000000;
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for (t = 0; t < 32; t++) {
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if ((reg & bit) > 0)
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len = len + sprintf (buf + len, "X");
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else
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len = len + sprintf (buf + len, " ");
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bit = bit >> 1;
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}
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len = len + sprintf (buf + len, "\nP0-IN: ");
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PORT_READ_REG (DANUBE_GPIO_P0_IN, reg);
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bit = 0x80000000;
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for (t = 0; t < 32; t++) {
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if ((reg & bit) > 0)
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len = len + sprintf (buf + len, "X");
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else
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len = len + sprintf (buf + len, " ");
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bit = bit >> 1;
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}
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len = len + sprintf (buf + len, "\nP1-IN: ");
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PORT_READ_REG (DANUBE_GPIO_P1_IN, reg);
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bit = 0x80000000;
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for (t = 0; t < 32; t++) {
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if ((reg & bit) > 0)
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len = len + sprintf (buf + len, "X");
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else
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len = len + sprintf (buf + len, " ");
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bit = bit >> 1;
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}
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len = len + sprintf (buf + len, "\nP0-DIR: ");
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PORT_READ_REG (DANUBE_GPIO_P0_DIR, reg);
|
|
bit = 0x80000000;
|
|
for (t = 0; t < 32; t++) {
|
|
if ((reg & bit) > 0)
|
|
len = len + sprintf (buf + len, "X");
|
|
else
|
|
len = len + sprintf (buf + len, " ");
|
|
bit = bit >> 1;
|
|
}
|
|
|
|
len = len + sprintf (buf + len, "\nP1-DIR: ");
|
|
PORT_READ_REG (DANUBE_GPIO_P1_DIR, reg);
|
|
bit = 0x80000000;
|
|
for (t = 0; t < 32; t++) {
|
|
if ((reg & bit) > 0)
|
|
len = len + sprintf (buf + len, "X");
|
|
else
|
|
len = len + sprintf (buf + len, " ");
|
|
bit = bit >> 1;
|
|
}
|
|
|
|
len = len + sprintf (buf + len, "\nP0-STO: ");
|
|
PORT_READ_REG (DANUBE_GPIO_P0_STOFF, reg);
|
|
bit = 0x80000000;
|
|
for (t = 0; t < 32; t++) {
|
|
if ((reg & bit) > 0)
|
|
len = len + sprintf (buf + len, "X");
|
|
else
|
|
len = len + sprintf (buf + len, " ");
|
|
bit = bit >> 1;
|
|
}
|
|
|
|
len = len + sprintf (buf + len, "\nP1-STO: ");
|
|
PORT_READ_REG (DANUBE_GPIO_P1_STOFF, reg);
|
|
bit = 0x80000000;
|
|
for (t = 0; t < 32; t++) {
|
|
if ((reg & bit) > 0)
|
|
len = len + sprintf (buf + len, "X");
|
|
else
|
|
len = len + sprintf (buf + len, " ");
|
|
bit = bit >> 1;
|
|
}
|
|
|
|
len = len + sprintf (buf + len, "\nP0-PUDE:");
|
|
PORT_READ_REG (DANUBE_GPIO_P0_PUDEN, reg);
|
|
bit = 0x80000000;
|
|
for (t = 0; t < 32; t++) {
|
|
if ((reg & bit) > 0)
|
|
len = len + sprintf (buf + len, "X");
|
|
else
|
|
len = len + sprintf (buf + len, " ");
|
|
bit = bit >> 1;
|
|
}
|
|
|
|
len = len + sprintf (buf + len, "\nP1-PUDE:");
|
|
PORT_READ_REG (DANUBE_GPIO_P1_PUDEN, reg);
|
|
bit = 0x80000000;
|
|
for (t = 0; t < 32; t++) {
|
|
if ((reg & bit) > 0)
|
|
len = len + sprintf (buf + len, "X");
|
|
else
|
|
len = len + sprintf (buf + len, " ");
|
|
bit = bit >> 1;
|
|
}
|
|
|
|
len = len + sprintf (buf + len, "\nP0-OD: ");
|
|
PORT_READ_REG (DANUBE_GPIO_P0_OD, reg);
|
|
bit = 0x80000000;
|
|
for (t = 0; t < 32; t++) {
|
|
if ((reg & bit) > 0)
|
|
len = len + sprintf (buf + len, "X");
|
|
else
|
|
len = len + sprintf (buf + len, " ");
|
|
bit = bit >> 1;
|
|
}
|
|
|
|
len = len + sprintf (buf + len, "\nP1-OD: ");
|
|
PORT_READ_REG (DANUBE_GPIO_P1_OD, reg);
|
|
bit = 0x80000000;
|
|
for (t = 0; t < 32; t++) {
|
|
if ((reg & bit) > 0)
|
|
len = len + sprintf (buf + len, "X");
|
|
else
|
|
len = len + sprintf (buf + len, " ");
|
|
bit = bit >> 1;
|
|
}
|
|
|
|
len = len + sprintf (buf + len, "\nP0-PUDS:");
|
|
PORT_READ_REG (DANUBE_GPIO_P0_PUDSEL, reg);
|
|
bit = 0x80000000;
|
|
for (t = 0; t < 32; t++) {
|
|
if ((reg & bit) > 0)
|
|
len = len + sprintf (buf + len, "X");
|
|
else
|
|
len = len + sprintf (buf + len, " ");
|
|
bit = bit >> 1;
|
|
}
|
|
|
|
len = len + sprintf (buf + len, "\nP1-PUDS:");
|
|
PORT_READ_REG (DANUBE_GPIO_P1_PUDSEL, reg);
|
|
bit = 0x80000000;
|
|
for (t = 0; t < 32; t++) {
|
|
if ((reg & bit) > 0)
|
|
len = len + sprintf (buf + len, "X");
|
|
else
|
|
len = len + sprintf (buf + len, " ");
|
|
bit = bit >> 1;
|
|
}
|
|
|
|
len = len + sprintf (buf + len, "\nP0_ALT0:");
|
|
PORT_READ_REG (DANUBE_GPIO_P0_ALTSEL0, reg);
|
|
bit = 0x80000000;
|
|
for (t = 0; t < 32; t++) {
|
|
if ((reg & bit) > 0)
|
|
len = len + sprintf (buf + len, "X");
|
|
else
|
|
len = len + sprintf (buf + len, " ");
|
|
bit = bit >> 1;
|
|
}
|
|
|
|
len = len + sprintf (buf + len, "\nP0_ALT1:");
|
|
PORT_READ_REG (DANUBE_GPIO_P0_ALTSEL1, reg);
|
|
bit = 0x80000000;
|
|
for (t = 0; t < 32; t++) {
|
|
if ((reg & bit) > 0)
|
|
len = len + sprintf (buf + len, "X");
|
|
else
|
|
len = len + sprintf (buf + len, " ");
|
|
bit = bit >> 1;
|
|
}
|
|
|
|
len = len + sprintf (buf + len, "\nP1_ALT0:");
|
|
PORT_READ_REG (DANUBE_GPIO_P1_ALTSEL0, reg);
|
|
bit = 0x80000000;
|
|
for (t = 0; t < 32; t++) {
|
|
if ((reg & bit) > 0)
|
|
len = len + sprintf (buf + len, "X");
|
|
else
|
|
len = len + sprintf (buf + len, " ");
|
|
bit = bit >> 1;
|
|
}
|
|
|
|
len = len + sprintf (buf + len, "\nP1_ALT1:");
|
|
PORT_READ_REG (DANUBE_GPIO_P1_ALTSEL1, reg);
|
|
bit = 0x80000000;
|
|
for (t = 0; t < 32; t++) {
|
|
if ((reg & bit) > 0)
|
|
len = len + sprintf (buf + len, "X");
|
|
else
|
|
len = len + sprintf (buf + len, " ");
|
|
bit = bit >> 1;
|
|
}
|
|
|
|
len = len + sprintf (buf + len, "\n\n");
|
|
|
|
*eof = 1; // No more data available
|
|
return len;
|
|
}
|
|
|
|
static int
|
|
danube_port_open (struct inode *inode, struct file *filep)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
danube_port_release (struct inode *inode, struct file *filelp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
danube_port_ioctl (struct inode *inode, struct file *filp,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
int ret = 0;
|
|
volatile struct danube_port_ioctl_parm parm;
|
|
|
|
if (_IOC_TYPE (cmd) != DANUBE_PORT_IOC_MAGIC)
|
|
return -EINVAL;
|
|
|
|
if (_IOC_DIR (cmd) & _IOC_WRITE) {
|
|
if (!access_ok
|
|
(VERIFY_READ, arg,
|
|
sizeof (struct danube_port_ioctl_parm)))
|
|
return -EFAULT;
|
|
ret = copy_from_user ((void *) &parm, (void *) arg,
|
|
sizeof (struct danube_port_ioctl_parm));
|
|
}
|
|
if (_IOC_DIR (cmd) & _IOC_READ) {
|
|
if (!access_ok
|
|
(VERIFY_WRITE, arg,
|
|
sizeof (struct danube_port_ioctl_parm)))
|
|
return -EFAULT;
|
|
}
|
|
|
|
if (down_trylock (&port_sem) != 0)
|
|
return -EBUSY;
|
|
|
|
switch (cmd) {
|
|
case DANUBE_PORT_IOCOD:
|
|
if (parm.value == 0x00) {
|
|
PORT_IOC_CALL (ret, parm.port, parm.pin,
|
|
danube_port_clear_open_drain);
|
|
}
|
|
else {
|
|
PORT_IOC_CALL (ret, parm.port, parm.pin,
|
|
danube_port_set_open_drain);
|
|
}
|
|
break;
|
|
case DANUBE_PORT_IOCPUDSEL:
|
|
if (parm.value == 0x00) {
|
|
PORT_IOC_CALL (ret, parm.port, parm.pin,
|
|
danube_port_clear_pudsel);
|
|
}
|
|
else {
|
|
PORT_IOC_CALL (ret, parm.port, parm.pin,
|
|
danube_port_set_pudsel);
|
|
}
|
|
break;
|
|
case DANUBE_PORT_IOCPUDEN:
|
|
if (parm.value == 0x00) {
|
|
PORT_IOC_CALL (ret, parm.port, parm.pin,
|
|
danube_port_clear_puden);
|
|
}
|
|
else {
|
|
PORT_IOC_CALL (ret, parm.port, parm.pin,
|
|
danube_port_set_puden);
|
|
}
|
|
break;
|
|
case DANUBE_PORT_IOCSTOFF:
|
|
if (parm.value == 0x00) {
|
|
PORT_IOC_CALL (ret, parm.port, parm.pin,
|
|
danube_port_clear_stoff);
|
|
}
|
|
else {
|
|
PORT_IOC_CALL (ret, parm.port, parm.pin,
|
|
danube_port_set_stoff);
|
|
}
|
|
break;
|
|
case DANUBE_PORT_IOCDIR:
|
|
if (parm.value == 0x00) {
|
|
PORT_IOC_CALL (ret, parm.port, parm.pin,
|
|
danube_port_set_dir_in);
|
|
}
|
|
else {
|
|
PORT_IOC_CALL (ret, parm.port, parm.pin,
|
|
danube_port_set_dir_out);
|
|
}
|
|
break;
|
|
case DANUBE_PORT_IOCOUTPUT:
|
|
if (parm.value == 0x00) {
|
|
PORT_IOC_CALL (ret, parm.port, parm.pin,
|
|
danube_port_clear_output);
|
|
}
|
|
else {
|
|
PORT_IOC_CALL (ret, parm.port, parm.pin,
|
|
danube_port_set_output);
|
|
}
|
|
break;
|
|
case DANUBE_PORT_IOCALTSEL0:
|
|
if (parm.value == 0x00) {
|
|
PORT_IOC_CALL (ret, parm.port, parm.pin,
|
|
danube_port_clear_altsel0);
|
|
}
|
|
else {
|
|
PORT_IOC_CALL (ret, parm.port, parm.pin,
|
|
danube_port_set_altsel0);
|
|
}
|
|
break;
|
|
case DANUBE_PORT_IOCALTSEL1:
|
|
if (parm.value == 0x00) {
|
|
PORT_IOC_CALL (ret, parm.port, parm.pin,
|
|
danube_port_clear_altsel1);
|
|
}
|
|
else {
|
|
PORT_IOC_CALL (ret, parm.port, parm.pin,
|
|
danube_port_set_altsel1);
|
|
}
|
|
break;
|
|
case DANUBE_PORT_IOCINPUT:
|
|
ret = danube_port_reserve_pin (parm.port, parm.pin,
|
|
PORT_MODULE_ID);
|
|
if (ret == 0)
|
|
parm.value =
|
|
danube_port_get_input (parm.port, parm.pin,
|
|
PORT_MODULE_ID);
|
|
ret = danube_port_free_pin (parm.port, parm.pin,
|
|
PORT_MODULE_ID);
|
|
copy_to_user ((void *) arg, (void *) &parm,
|
|
sizeof (struct danube_port_ioctl_parm));
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
up (&port_sem);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct file_operations port_fops = {
|
|
open:danube_port_open,
|
|
release:danube_port_release,
|
|
ioctl:danube_port_ioctl
|
|
};
|
|
|
|
int __init
|
|
danube_port_init (void)
|
|
{
|
|
int t = 0;
|
|
int i = 0;
|
|
int err = 0;
|
|
printk ("Danube Port Initialization\n");
|
|
|
|
sema_init (&port_sem, 1);
|
|
|
|
/* Check ports for available pins */
|
|
for (t = 0; t < MAX_PORTS; t++) {
|
|
for (i = 0; i < PINS_PER_PORT; i++)
|
|
danube_port_pin_usage[t][i] = 0;
|
|
}
|
|
|
|
/* register port device */
|
|
err = register_chrdev (0, "danube-port", &port_fops);
|
|
if (err > 0)
|
|
port_major = err;
|
|
else {
|
|
printk ("danube-port: Error! Could not register port device. #%d\n", err);
|
|
return err;
|
|
}
|
|
|
|
/* Create proc file */
|
|
create_proc_read_entry ("driver/danube_port", 0, NULL,
|
|
danube_port_read_procmem, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
module_init (danube_port_init);
|
|
|
|
EXPORT_SYMBOL (danube_port_reserve_pin);
|
|
EXPORT_SYMBOL (danube_port_free_pin);
|
|
EXPORT_SYMBOL (danube_port_set_open_drain);
|
|
EXPORT_SYMBOL (danube_port_clear_open_drain);
|
|
EXPORT_SYMBOL (danube_port_set_pudsel);
|
|
EXPORT_SYMBOL (danube_port_clear_pudsel);
|
|
EXPORT_SYMBOL (danube_port_set_puden);
|
|
EXPORT_SYMBOL (danube_port_clear_puden);
|
|
EXPORT_SYMBOL (danube_port_set_stoff);
|
|
EXPORT_SYMBOL (danube_port_clear_stoff);
|
|
EXPORT_SYMBOL (danube_port_set_dir_out);
|
|
EXPORT_SYMBOL (danube_port_set_dir_in);
|
|
EXPORT_SYMBOL (danube_port_set_output);
|
|
EXPORT_SYMBOL (danube_port_clear_output);
|
|
EXPORT_SYMBOL (danube_port_get_input);
|
|
|
|
EXPORT_SYMBOL (danube_port_set_altsel0);
|
|
EXPORT_SYMBOL (danube_port_clear_altsel0);
|
|
EXPORT_SYMBOL (danube_port_set_altsel1);
|
|
EXPORT_SYMBOL (danube_port_clear_altsel1);
|