diff options
Diffstat (limited to 'target/linux/danube/files/drivers/char/danube_gpio.c')
| -rw-r--r-- | target/linux/danube/files/drivers/char/danube_gpio.c | 442 |
1 files changed, 0 insertions, 442 deletions
diff --git a/target/linux/danube/files/drivers/char/danube_gpio.c b/target/linux/danube/files/drivers/char/danube_gpio.c deleted file mode 100644 index dbdb71e8f..000000000 --- a/target/linux/danube/files/drivers/char/danube_gpio.c +++ /dev/null @@ -1,442 +0,0 @@ -/* - * 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. - * - * Copyright (C) 2005 infineon - * Copyright (C) 2007 John Crispin <blogic@openwrt.org> - * - */ - -#include <linux/module.h> -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/proc_fs.h> -#include <linux/init.h> -#include <linux/ioctl.h> -#include <asm/semaphore.h> -#include <asm/uaccess.h> -#include <asm/danube/danube.h> -#include <asm/danube/danube_ioctl.h> - -#define MAX_PORTS 2 -#define PINS_PER_PORT 16 - -static unsigned int danube_gpio_major = 0; - -/* TODO do we need this ? */ -static struct semaphore port_sem; - -/* TODO do we really need this ? return in a define is forbidden by coding style */ -#define DANUBE_GPIO_SANITY {if (port > MAX_PORTS || pin > PINS_PER_PORT) return -EINVAL; } - -int -danube_port_reserve_pin (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - printk("%s : call to obseleted function\n", __func__); - - return 0; -} -EXPORT_SYMBOL(danube_port_reserve_pin); - -int -danube_port_free_pin (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - printk("%s : call to obseleted function\n", __func__); - - return 0; -} -EXPORT_SYMBOL(danube_port_free_pin); - -int -danube_port_set_open_drain (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - writel(readl(DANUBE_GPIO_P0_OD + (port * 0x30)) | (1 << pin), DANUBE_GPIO_P0_OD); - - return 0; -} -EXPORT_SYMBOL(danube_port_set_open_drain); - -int -danube_port_clear_open_drain (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - writel(readl(DANUBE_GPIO_P0_OD + (port * 0x30)) & ~(1 << pin), DANUBE_GPIO_P0_OD); - - return 0; -} -EXPORT_SYMBOL(danube_port_clear_open_drain); - -int -danube_port_set_pudsel (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - writel(readl(DANUBE_GPIO_P0_PUDSEL + (port * 0x30)) | (1 << pin), DANUBE_GPIO_P0_PUDSEL); - - return 0; -} -EXPORT_SYMBOL(danube_port_set_pudsel); - -int -danube_port_clear_pudsel (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - writel(readl(DANUBE_GPIO_P0_PUDSEL + (port * 0x30)) & ~(1 << pin), DANUBE_GPIO_P0_PUDSEL); - - return 0; -} -EXPORT_SYMBOL(danube_port_clear_pudsel); - -int -danube_port_set_puden (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - writel(readl(DANUBE_GPIO_P0_PUDEN + (port * 0x30)) | (1 << pin), DANUBE_GPIO_P0_PUDEN); - - return 0; -} -EXPORT_SYMBOL(danube_port_set_puden); - -int -danube_port_clear_puden (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - writel(readl(DANUBE_GPIO_P0_PUDEN + (port * 0x30)) & ~(1 << pin), DANUBE_GPIO_P0_PUDEN); - - return 0; -} -EXPORT_SYMBOL(danube_port_clear_puden); - -int -danube_port_set_stoff (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - writel(readl(DANUBE_GPIO_P0_STOFF + (port * 0x30)) | (1 << pin), DANUBE_GPIO_P0_STOFF); - - return 0; -} -EXPORT_SYMBOL(danube_port_set_stoff); - -int -danube_port_clear_stoff (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - writel(readl(DANUBE_GPIO_P0_STOFF + (port * 0x30)) & ~(1 << pin), DANUBE_GPIO_P0_STOFF); - - return 0; -} -EXPORT_SYMBOL(danube_port_clear_stoff); - -int -danube_port_set_dir_out (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - writel(readl(DANUBE_GPIO_P0_DIR + (port * 0x30)) | (1 << pin), DANUBE_GPIO_P0_DIR); - - return 0; -} -EXPORT_SYMBOL(danube_port_set_dir_out); - -int -danube_port_set_dir_in (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - writel(readl(DANUBE_GPIO_P0_DIR + (port * 0x30)) & ~(1 << pin), DANUBE_GPIO_P0_DIR); - - return 0; -} -EXPORT_SYMBOL(danube_port_set_dir_in); - -int -danube_port_set_output (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - writel(readl(DANUBE_GPIO_P0_OUT + (port * 0x30)) | (1 << pin), DANUBE_GPIO_P0_OUT); - - return 0; -} -EXPORT_SYMBOL(danube_port_set_output); - -int -danube_port_clear_output (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - writel(readl(DANUBE_GPIO_P0_OUT + (port * 0x30)) & ~(1 << pin), DANUBE_GPIO_P0_OUT); - - return 0; -} -EXPORT_SYMBOL(danube_port_clear_output); - -int -danube_port_get_input (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - - if (readl(DANUBE_GPIO_P0_IN + (port * 0x30)) & (1 << pin)) - return 0; - else - return 1; -} -EXPORT_SYMBOL(danube_port_get_input); - -int -danube_port_set_altsel0 (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - writel(readl(DANUBE_GPIO_P0_ALTSEL0 + (port * 0x30)) | (1 << pin), DANUBE_GPIO_P0_ALTSEL0); - - return 0; -} -EXPORT_SYMBOL(danube_port_set_altsel0); - -int -danube_port_clear_altsel0 (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - writel(readl(DANUBE_GPIO_P0_ALTSEL0 + (port * 0x30)) & ~(1 << pin), DANUBE_GPIO_P0_ALTSEL0); - - return 0; -} -EXPORT_SYMBOL(danube_port_clear_altsel0); - -int -danube_port_set_altsel1 (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - writel(readl(DANUBE_GPIO_P0_ALTSEL1 + (port * 0x30)) | (1 << pin), DANUBE_GPIO_P0_ALTSEL1); - - return 0; -} -EXPORT_SYMBOL(danube_port_set_altsel1); - -int -danube_port_clear_altsel1 (unsigned int port, unsigned int pin) -{ - DANUBE_GPIO_SANITY; - writel(readl(DANUBE_GPIO_P0_ALTSEL1 + (port * 0x30)) & ~(1 << pin), DANUBE_GPIO_P0_ALTSEL1); - - return 0; -} -EXPORT_SYMBOL(danube_port_clear_altsel1); - -long danube_port_read_procmem_helper(char* tag, u32* in_reg, char *buf) -{ - u32 reg, bit = 0; - unsigned int len, t; - - len = sprintf(buf, "\n%s: ", tag); - reg = readl(in_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; - } - - return len; -} - -int -danube_port_read_procmem (char *buf, char **start, off_t offset, int count, - int *eof, void *data) -{ - long len = sprintf (buf, "\nDanube Port Settings\n"); - - len += sprintf (buf + len, - " 3 2 1 0\n"); - len += sprintf (buf + len, - " 10987654321098765432109876543210\n"); - len += sprintf (buf + len, - "----------------------------------------\n"); - - len += danube_port_read_procmem_helper("P0-OUT", DANUBE_GPIO_P0_OUT, &buf[len]); - len += danube_port_read_procmem_helper("P1-OUT", DANUBE_GPIO_P1_OUT, &buf[len]); - len += danube_port_read_procmem_helper("P0-IN ", DANUBE_GPIO_P0_IN, &buf[len]); - len += danube_port_read_procmem_helper("P1-IN ", DANUBE_GPIO_P1_IN, &buf[len]); - len += danube_port_read_procmem_helper("P0-DIR", DANUBE_GPIO_P0_DIR, &buf[len]); - len += danube_port_read_procmem_helper("P1-DIR", DANUBE_GPIO_P1_DIR, &buf[len]); - len += danube_port_read_procmem_helper("P0-STO ", DANUBE_GPIO_P0_STOFF, &buf[len]); - len += danube_port_read_procmem_helper("P1-STO ", DANUBE_GPIO_P1_STOFF, &buf[len]); - len += danube_port_read_procmem_helper("P0-PUDE", DANUBE_GPIO_P0_PUDEN, &buf[len]); - len += danube_port_read_procmem_helper("P1-PUDE", DANUBE_GPIO_P1_PUDEN, &buf[len]); - len += danube_port_read_procmem_helper("P0-OD ", DANUBE_GPIO_P0_OD, &buf[len]); - len += danube_port_read_procmem_helper("P1-OD ", DANUBE_GPIO_P1_OD, &buf[len]); - len += danube_port_read_procmem_helper("P0-PUDS", DANUBE_GPIO_P0_PUDSEL, &buf[len]); - len += danube_port_read_procmem_helper("P1-PUDS", DANUBE_GPIO_P1_PUDSEL, &buf[len]); - len += danube_port_read_procmem_helper("P0-ALT0", DANUBE_GPIO_P0_ALTSEL0, &buf[len]); - len += danube_port_read_procmem_helper("P1-ALT0", DANUBE_GPIO_P1_ALTSEL0, &buf[len]); - len += danube_port_read_procmem_helper("P0-ALT1", DANUBE_GPIO_P0_ALTSEL1, &buf[len]); - len += danube_port_read_procmem_helper("P1-ALT1", DANUBE_GPIO_P1_ALTSEL1, &buf[len]); - len = len + sprintf (buf + len, "\n\n"); - - *eof = 1; - - 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) - danube_port_clear_open_drain(parm.port, parm.pin); - else - danube_port_set_open_drain(parm.port, parm.pin); - break; - - case DANUBE_PORT_IOCPUDSEL: - if (parm.value == 0x00) - danube_port_clear_pudsel(parm.port, parm.pin); - else - danube_port_set_pudsel(parm.port, parm.pin); - break; - - case DANUBE_PORT_IOCPUDEN: - if (parm.value == 0x00) - danube_port_clear_puden(parm.port, parm.pin); - else - danube_port_set_puden(parm.port, parm.pin); - break; - - case DANUBE_PORT_IOCSTOFF: - if (parm.value == 0x00) - danube_port_clear_stoff(parm.port, parm.pin); - else - danube_port_set_stoff(parm.port, parm.pin); - break; - - case DANUBE_PORT_IOCDIR: - if (parm.value == 0x00) - danube_port_set_dir_in(parm.port, parm.pin); - else - danube_port_set_dir_out(parm.port, parm.pin); - break; - - case DANUBE_PORT_IOCOUTPUT: - if (parm.value == 0x00) - danube_port_clear_output(parm.port, parm.pin); - else - danube_port_set_output(parm.port, parm.pin); - break; - - case DANUBE_PORT_IOCALTSEL0: - if (parm.value == 0x00) - danube_port_clear_altsel0(parm.port, parm.pin); - else - danube_port_set_altsel0(parm.port, parm.pin); - break; - - case DANUBE_PORT_IOCALTSEL1: - if (parm.value == 0x00) - danube_port_clear_altsel1(parm.port, parm.pin); - else - danube_port_set_altsel1(parm.port, parm.pin); - break; - - case DANUBE_PORT_IOCINPUT: - parm.value = danube_port_get_input(parm.port, parm.pin); - 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_gpio_init (void) -{ - int retval = 0; - - sema_init (&port_sem, 1); - - danube_gpio_major = register_chrdev(0, "danube_gpio", &port_fops); - if (!danube_gpio_major) - { - printk("danube-port: Error! Could not register port device. #%d\n", danube_gpio_major); - retval = -EINVAL; - goto out; - } - - create_proc_read_entry("danube_gpio", 0, NULL, - danube_port_read_procmem, NULL); - - printk("registered danube gpio driver\n"); - -out: - return retval; -} - -void __exit -danube_gpio_exit (void) -{ - unregister_chrdev(danube_gpio_major, "danube_gpio"); - remove_proc_entry("danube_gpio", NULL); -} - -module_init(danube_gpio_init); -module_exit(danube_gpio_exit); |