+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Driver for TANBAC TB0219 base board.
- *
- * Copyright (C) 2005 Yoichi Yuasa <yuasa@linux-mips.org>
- */
-#include <linux/platform_device.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/uaccess.h>
-
-#include <asm/io.h>
-#include <asm/reboot.h>
-#include <asm/vr41xx/giu.h>
-#include <asm/vr41xx/tb0219.h>
-
-MODULE_AUTHOR("Yoichi Yuasa <yuasa@linux-mips.org>");
-MODULE_DESCRIPTION("TANBAC TB0219 base board driver");
-MODULE_LICENSE("GPL");
-
-static int major; /* default is dynamic major device number */
-module_param(major, int, 0);
-MODULE_PARM_DESC(major, "Major device number");
-
-static void (*old_machine_restart)(char *command);
-static void __iomem *tb0219_base;
-static DEFINE_SPINLOCK(tb0219_lock);
-
-#define tb0219_read(offset) readw(tb0219_base + (offset))
-#define tb0219_write(offset, value) writew((value), tb0219_base + (offset))
-
-#define TB0219_START 0x0a000000UL
-#define TB0219_SIZE 0x20UL
-
-#define TB0219_LED 0x00
-#define TB0219_GPIO_INPUT 0x02
-#define TB0219_GPIO_OUTPUT 0x04
-#define TB0219_DIP_SWITCH 0x06
-#define TB0219_MISC 0x08
-#define TB0219_RESET 0x0e
-#define TB0219_PCI_SLOT1_IRQ_STATUS 0x10
-#define TB0219_PCI_SLOT2_IRQ_STATUS 0x12
-#define TB0219_PCI_SLOT3_IRQ_STATUS 0x14
-
-typedef enum {
- TYPE_LED,
- TYPE_GPIO_OUTPUT,
-} tb0219_type_t;
-
-/*
- * Minor device number
- * 0 = 7 segment LED
- *
- * 16 = GPIO IN 0
- * 17 = GPIO IN 1
- * 18 = GPIO IN 2
- * 19 = GPIO IN 3
- * 20 = GPIO IN 4
- * 21 = GPIO IN 5
- * 22 = GPIO IN 6
- * 23 = GPIO IN 7
- *
- * 32 = GPIO OUT 0
- * 33 = GPIO OUT 1
- * 34 = GPIO OUT 2
- * 35 = GPIO OUT 3
- * 36 = GPIO OUT 4
- * 37 = GPIO OUT 5
- * 38 = GPIO OUT 6
- * 39 = GPIO OUT 7
- *
- * 48 = DIP switch 1
- * 49 = DIP switch 2
- * 50 = DIP switch 3
- * 51 = DIP switch 4
- * 52 = DIP switch 5
- * 53 = DIP switch 6
- * 54 = DIP switch 7
- * 55 = DIP switch 8
- */
-
-static inline char get_led(void)
-{
- return (char)tb0219_read(TB0219_LED);
-}
-
-static inline char get_gpio_input_pin(unsigned int pin)
-{
- uint16_t values;
-
- values = tb0219_read(TB0219_GPIO_INPUT);
- if (values & (1 << pin))
- return '1';
-
- return '0';
-}
-
-static inline char get_gpio_output_pin(unsigned int pin)
-{
- uint16_t values;
-
- values = tb0219_read(TB0219_GPIO_OUTPUT);
- if (values & (1 << pin))
- return '1';
-
- return '0';
-}
-
-static inline char get_dip_switch(unsigned int pin)
-{
- uint16_t values;
-
- values = tb0219_read(TB0219_DIP_SWITCH);
- if (values & (1 << pin))
- return '1';
-
- return '0';
-}
-
-static inline int set_led(char command)
-{
- tb0219_write(TB0219_LED, command);
-
- return 0;
-}
-
-static inline int set_gpio_output_pin(unsigned int pin, char command)
-{
- unsigned long flags;
- uint16_t value;
-
- if (command != '0' && command != '1')
- return -EINVAL;
-
- spin_lock_irqsave(&tb0219_lock, flags);
- value = tb0219_read(TB0219_GPIO_OUTPUT);
- if (command == '0')
- value &= ~(1 << pin);
- else
- value |= 1 << pin;
- tb0219_write(TB0219_GPIO_OUTPUT, value);
- spin_unlock_irqrestore(&tb0219_lock, flags);
-
- return 0;
-
-}
-
-static ssize_t tanbac_tb0219_read(struct file *file, char __user *buf, size_t len,
- loff_t *ppos)
-{
- unsigned int minor;
- char value;
-
- minor = iminor(file_inode(file));
- switch (minor) {
- case 0:
- value = get_led();
- break;
- case 16 ... 23:
- value = get_gpio_input_pin(minor - 16);
- break;
- case 32 ... 39:
- value = get_gpio_output_pin(minor - 32);
- break;
- case 48 ... 55:
- value = get_dip_switch(minor - 48);
- break;
- default:
- return -EBADF;
- }
-
- if (len <= 0)
- return -EFAULT;
-
- if (put_user(value, buf))
- return -EFAULT;
-
- return 1;
-}
-
-static ssize_t tanbac_tb0219_write(struct file *file, const char __user *data,
- size_t len, loff_t *ppos)
-{
- unsigned int minor;
- tb0219_type_t type;
- size_t i;
- int retval = 0;
- char c;
-
- minor = iminor(file_inode(file));
- switch (minor) {
- case 0:
- type = TYPE_LED;
- break;
- case 32 ... 39:
- type = TYPE_GPIO_OUTPUT;
- break;
- default:
- return -EBADF;
- }
-
- for (i = 0; i < len; i++) {
- if (get_user(c, data + i))
- return -EFAULT;
-
- switch (type) {
- case TYPE_LED:
- retval = set_led(c);
- break;
- case TYPE_GPIO_OUTPUT:
- retval = set_gpio_output_pin(minor - 32, c);
- break;
- }
-
- if (retval < 0)
- break;
- }
-
- return i;
-}
-
-static int tanbac_tb0219_open(struct inode *inode, struct file *file)
-{
- unsigned int minor;
-
- minor = iminor(inode);
- switch (minor) {
- case 0:
- case 16 ... 23:
- case 32 ... 39:
- case 48 ... 55:
- return stream_open(inode, file);
- default:
- break;
- }
-
- return -EBADF;
-}
-
-static int tanbac_tb0219_release(struct inode *inode, struct file *file)
-{
- return 0;
-}
-
-static const struct file_operations tb0219_fops = {
- .owner = THIS_MODULE,
- .read = tanbac_tb0219_read,
- .write = tanbac_tb0219_write,
- .open = tanbac_tb0219_open,
- .release = tanbac_tb0219_release,
- .llseek = no_llseek,
-};
-
-static void tb0219_restart(char *command)
-{
- tb0219_write(TB0219_RESET, 0);
-}
-
-static void tb0219_pci_irq_init(void)
-{
- /* PCI Slot 1 */
- vr41xx_set_irq_trigger(TB0219_PCI_SLOT1_PIN, IRQ_TRIGGER_LEVEL, IRQ_SIGNAL_THROUGH);
- vr41xx_set_irq_level(TB0219_PCI_SLOT1_PIN, IRQ_LEVEL_LOW);
-
- /* PCI Slot 2 */
- vr41xx_set_irq_trigger(TB0219_PCI_SLOT2_PIN, IRQ_TRIGGER_LEVEL, IRQ_SIGNAL_THROUGH);
- vr41xx_set_irq_level(TB0219_PCI_SLOT2_PIN, IRQ_LEVEL_LOW);
-
- /* PCI Slot 3 */
- vr41xx_set_irq_trigger(TB0219_PCI_SLOT3_PIN, IRQ_TRIGGER_LEVEL, IRQ_SIGNAL_THROUGH);
- vr41xx_set_irq_level(TB0219_PCI_SLOT3_PIN, IRQ_LEVEL_LOW);
-}
-
-static int tb0219_probe(struct platform_device *dev)
-{
- int retval;
-
- if (request_mem_region(TB0219_START, TB0219_SIZE, "TB0219") == NULL)
- return -EBUSY;
-
- tb0219_base = ioremap(TB0219_START, TB0219_SIZE);
- if (tb0219_base == NULL) {
- release_mem_region(TB0219_START, TB0219_SIZE);
- return -ENOMEM;
- }
-
- retval = register_chrdev(major, "TB0219", &tb0219_fops);
- if (retval < 0) {
- iounmap(tb0219_base);
- tb0219_base = NULL;
- release_mem_region(TB0219_START, TB0219_SIZE);
- return retval;
- }
-
- old_machine_restart = _machine_restart;
- _machine_restart = tb0219_restart;
-
- tb0219_pci_irq_init();
-
- if (major == 0) {
- major = retval;
- printk(KERN_INFO "TB0219: major number %d\n", major);
- }
-
- return 0;
-}
-
-static int tb0219_remove(struct platform_device *dev)
-{
- _machine_restart = old_machine_restart;
-
- iounmap(tb0219_base);
- tb0219_base = NULL;
-
- release_mem_region(TB0219_START, TB0219_SIZE);
-
- return 0;
-}
-
-static struct platform_device *tb0219_platform_device;
-
-static struct platform_driver tb0219_device_driver = {
- .probe = tb0219_probe,
- .remove = tb0219_remove,
- .driver = {
- .name = "TB0219",
- },
-};
-
-static int __init tanbac_tb0219_init(void)
-{
- int retval;
-
- tb0219_platform_device = platform_device_alloc("TB0219", -1);
- if (!tb0219_platform_device)
- return -ENOMEM;
-
- retval = platform_device_add(tb0219_platform_device);
- if (retval < 0) {
- platform_device_put(tb0219_platform_device);
- return retval;
- }
-
- retval = platform_driver_register(&tb0219_device_driver);
- if (retval < 0)
- platform_device_unregister(tb0219_platform_device);
-
- return retval;
-}
-
-static void __exit tanbac_tb0219_exit(void)
-{
- platform_driver_unregister(&tb0219_device_driver);
- platform_device_unregister(tb0219_platform_device);
-}
-
-module_init(tanbac_tb0219_init);
-module_exit(tanbac_tb0219_exit);
projects / platform / kernel / linux-rpi.git / commitdiff