diff options
Diffstat (limited to 'drivers/char/lcd.c')
| -rw-r--r-- | drivers/char/lcd.c | 688 |
1 files changed, 0 insertions, 688 deletions
diff --git a/drivers/char/lcd.c b/drivers/char/lcd.c deleted file mode 100644 index 29963d8be66..00000000000 --- a/drivers/char/lcd.c +++ /dev/null @@ -1,688 +0,0 @@ -/* - * LCD, LED and Button interface for Cobalt - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 1996, 1997 by Andrew Bose - * - * Linux kernel version history: - * March 2001: Ported from 2.0.34 by Liam Davies - * - */ - -#define RTC_IO_EXTENT 0x10 /*Only really two ports, but... */ - -#include <linux/config.h> -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/miscdevice.h> -#include <linux/slab.h> -#include <linux/ioport.h> -#include <linux/fcntl.h> -#include <linux/mc146818rtc.h> -#include <linux/netdevice.h> -#include <linux/sched.h> -#include <linux/delay.h> - -#include <asm/io.h> -#include <asm/uaccess.h> -#include <asm/system.h> -#include <linux/delay.h> - -#include "lcd.h" - -static DEFINE_SPINLOCK(lcd_lock); - -static int lcd_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg); - -static unsigned int lcd_present = 1; - -/* used in arch/mips/cobalt/reset.c */ -int led_state = 0; - -#if defined(CONFIG_TULIP) && 0 - -#define MAX_INTERFACES 8 -static linkcheck_func_t linkcheck_callbacks[MAX_INTERFACES]; -static void *linkcheck_cookies[MAX_INTERFACES]; - -int lcd_register_linkcheck_func(int iface_num, void *func, void *cookie) -{ - if (iface_num < 0 || - iface_num >= MAX_INTERFACES || - linkcheck_callbacks[iface_num] != NULL) - return -1; - linkcheck_callbacks[iface_num] = (linkcheck_func_t) func; - linkcheck_cookies[iface_num] = cookie; - return 0; -} -#endif - -static int lcd_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg) -{ - struct lcd_display button_display; - unsigned long address, a; - - switch (cmd) { - case LCD_On: - udelay(150); - BusyCheck(); - LCDWriteInst(0x0F); - break; - - case LCD_Off: - udelay(150); - BusyCheck(); - LCDWriteInst(0x08); - break; - - case LCD_Reset: - udelay(150); - LCDWriteInst(0x3F); - udelay(150); - LCDWriteInst(0x3F); - udelay(150); - LCDWriteInst(0x3F); - udelay(150); - LCDWriteInst(0x3F); - udelay(150); - LCDWriteInst(0x01); - udelay(150); - LCDWriteInst(0x06); - break; - - case LCD_Clear: - udelay(150); - BusyCheck(); - LCDWriteInst(0x01); - break; - - case LCD_Cursor_Left: - udelay(150); - BusyCheck(); - LCDWriteInst(0x10); - break; - - case LCD_Cursor_Right: - udelay(150); - BusyCheck(); - LCDWriteInst(0x14); - break; - - case LCD_Cursor_Off: - udelay(150); - BusyCheck(); - LCDWriteInst(0x0C); - break; - - case LCD_Cursor_On: - udelay(150); - BusyCheck(); - LCDWriteInst(0x0F); - break; - - case LCD_Blink_Off: - udelay(150); - BusyCheck(); - LCDWriteInst(0x0E); - break; - - case LCD_Get_Cursor_Pos:{ - struct lcd_display display; - - udelay(150); - BusyCheck(); - display.cursor_address = (LCDReadInst); - display.cursor_address = - (display.cursor_address & 0x07F); - if (copy_to_user - ((struct lcd_display *) arg, &display, - sizeof(struct lcd_display))) - return -EFAULT; - - break; - } - - - case LCD_Set_Cursor_Pos:{ - struct lcd_display display; - - if (copy_from_user - (&display, (struct lcd_display *) arg, - sizeof(struct lcd_display))) - return -EFAULT; - - a = (display.cursor_address | kLCD_Addr); - - udelay(150); - BusyCheck(); - LCDWriteInst(a); - - break; - } - - case LCD_Get_Cursor:{ - struct lcd_display display; - - udelay(150); - BusyCheck(); - display.character = LCDReadData; - - if (copy_to_user - ((struct lcd_display *) arg, &display, - sizeof(struct lcd_display))) - return -EFAULT; - udelay(150); - BusyCheck(); - LCDWriteInst(0x10); - - break; - } - - case LCD_Set_Cursor:{ - struct lcd_display display; - - if (copy_from_user - (&display, (struct lcd_display *) arg, - sizeof(struct lcd_display))) - return -EFAULT; - - udelay(150); - BusyCheck(); - LCDWriteData(display.character); - udelay(150); - BusyCheck(); - LCDWriteInst(0x10); - - break; - } - - - case LCD_Disp_Left: - udelay(150); - BusyCheck(); - LCDWriteInst(0x18); - break; - - case LCD_Disp_Right: - udelay(150); - BusyCheck(); - LCDWriteInst(0x1C); - break; - - case LCD_Home: - udelay(150); - BusyCheck(); - LCDWriteInst(0x02); - break; - - case LCD_Write:{ - struct lcd_display display; - unsigned int index; - - - if (copy_from_user - (&display, (struct lcd_display *) arg, - sizeof(struct lcd_display))) - return -EFAULT; - - udelay(150); - BusyCheck(); - LCDWriteInst(0x80); - udelay(150); - BusyCheck(); - - for (index = 0; index < (display.size1); index++) { - udelay(150); - BusyCheck(); - LCDWriteData(display.line1[index]); - BusyCheck(); - } - - udelay(150); - BusyCheck(); - LCDWriteInst(0xC0); - udelay(150); - BusyCheck(); - for (index = 0; index < (display.size2); index++) { - udelay(150); - BusyCheck(); - LCDWriteData(display.line2[index]); - } - - break; - } - - case LCD_Read:{ - struct lcd_display display; - - BusyCheck(); - for (address = kDD_R00; address <= kDD_R01; - address++) { - a = (address | kLCD_Addr); - - udelay(150); - BusyCheck(); - LCDWriteInst(a); - udelay(150); - BusyCheck(); - display.line1[address] = LCDReadData; - } - - display.line1[0x27] = '\0'; - - for (address = kDD_R10; address <= kDD_R11; - address++) { - a = (address | kLCD_Addr); - - udelay(150); - BusyCheck(); - LCDWriteInst(a); - - udelay(150); - BusyCheck(); - display.line2[address - 0x40] = - LCDReadData; - } - - display.line2[0x27] = '\0'; - - if (copy_to_user - ((struct lcd_display *) arg, &display, - sizeof(struct lcd_display))) - return -EFAULT; - break; - } - -// set all GPIO leds to led_display.leds - - case LED_Set:{ - struct lcd_display led_display; - - - if (copy_from_user - (&led_display, (struct lcd_display *) arg, - sizeof(struct lcd_display))) - return -EFAULT; - - led_state = led_display.leds; - LEDSet(led_state); - - break; - } - - -// set only bit led_display.leds - - case LED_Bit_Set:{ - unsigned int i; - int bit = 1; - struct lcd_display led_display; - - - if (copy_from_user - (&led_display, (struct lcd_display *) arg, - sizeof(struct lcd_display))) - return -EFAULT; - - for (i = 0; i < (int) led_display.leds; i++) { - bit = 2 * bit; - } - - led_state = led_state | bit; - LEDSet(led_state); - break; - } - -// clear only bit led_display.leds - - case LED_Bit_Clear:{ - unsigned int i; - int bit = 1; - struct lcd_display led_display; - - - if (copy_from_user - (&led_display, (struct lcd_display *) arg, - sizeof(struct lcd_display))) - return -EFAULT; - - for (i = 0; i < (int) led_display.leds; i++) { - bit = 2 * bit; - } - - led_state = led_state & ~bit; - LEDSet(led_state); - break; - } - - - case BUTTON_Read:{ - button_display.buttons = GPIRead; - if (copy_to_user - ((struct lcd_display *) arg, &button_display, - sizeof(struct lcd_display))) - return -EFAULT; - break; - } - - case LINK_Check:{ - button_display.buttons = - *((volatile unsigned long *) (0xB0100060)); - if (copy_to_user - ((struct lcd_display *) arg, &button_display, - sizeof(struct lcd_display))) - return -EFAULT; - break; - } - - case LINK_Check_2:{ - int iface_num; - - /* panel-utils should pass in the desired interface status is wanted for - * in "buttons" of the structure. We will set this to non-zero if the - * link is in fact up for the requested interface. --DaveM - */ - if (copy_from_user - (&button_display, (struct lcd_display *) arg, - sizeof(button_display))) - return -EFAULT; - iface_num = button_display.buttons; -#if defined(CONFIG_TULIP) && 0 - if (iface_num >= 0 && - iface_num < MAX_INTERFACES && - linkcheck_callbacks[iface_num] != NULL) { - button_display.buttons = - linkcheck_callbacks[iface_num] - (linkcheck_cookies[iface_num]); - } else -#endif - button_display.buttons = 0; - - if (__copy_to_user - ((struct lcd_display *) arg, &button_display, - sizeof(struct lcd_display))) - return -EFAULT; - break; - } - -// Erase the flash - - case FLASH_Erase:{ - - int ctr = 0; - - if ( !capable(CAP_SYS_ADMIN) ) return -EPERM; - - pr_info(LCD "Erasing Flash\n"); - - // Chip Erase Sequence - WRITE_FLASH(kFlash_Addr1, kFlash_Data1); - WRITE_FLASH(kFlash_Addr2, kFlash_Data2); - WRITE_FLASH(kFlash_Addr1, kFlash_Erase3); - WRITE_FLASH(kFlash_Addr1, kFlash_Data1); - WRITE_FLASH(kFlash_Addr2, kFlash_Data2); - WRITE_FLASH(kFlash_Addr1, kFlash_Erase6); - - while ((!dqpoll(0x00000000, 0xFF)) - && (!timeout(0x00000000))) { - ctr++; - } - - if (READ_FLASH(0x07FFF0) == 0xFF) { - pr_info(LCD "Erase Successful\n"); - } else if (timeout) { - pr_info(LCD "Erase Timed Out\n"); - } - - break; - } - -// burn the flash - - case FLASH_Burn:{ - - volatile unsigned long burn_addr; - unsigned long flags; - unsigned int i, index; - unsigned char *rom; - - - struct lcd_display display; - - if ( !capable(CAP_SYS_ADMIN) ) return -EPERM; - - if (copy_from_user - (&display, (struct lcd_display *) arg, - sizeof(struct lcd_display))) - return -EFAULT; - rom = (unsigned char *) kmalloc((128), GFP_ATOMIC); - if (rom == NULL) { - printk(KERN_ERR LCD "kmalloc() failed in %s\n", - __FUNCTION__); - return -ENOMEM; - } - - pr_info(LCD "Starting Flash burn\n"); - for (i = 0; i < FLASH_SIZE; i = i + 128) { - - if (copy_from_user - (rom, display.RomImage + i, 128)) { - kfree(rom); - return -EFAULT; - } - burn_addr = kFlashBase + i; - spin_lock_irqsave(&lcd_lock, flags); - for (index = 0; index < (128); index++) { - - WRITE_FLASH(kFlash_Addr1, - kFlash_Data1); - WRITE_FLASH(kFlash_Addr2, - kFlash_Data2); - WRITE_FLASH(kFlash_Addr1, - kFlash_Prog); - *((volatile unsigned char *)burn_addr) = - (volatile unsigned char) rom[index]; - - while ((!dqpoll (burn_addr, - (volatile unsigned char) - rom[index])) && - (!timeout(burn_addr))) { } - burn_addr++; - } - spin_unlock_irqrestore(&lcd_lock, flags); - if (* ((volatile unsigned char *) - (burn_addr - 1)) == - (volatile unsigned char) - rom[index - 1]) { - } else if (timeout) { - pr_info(LCD "Flash burn timed out\n"); - } - - - } - kfree(rom); - - pr_info(LCD "Flash successfully burned\n"); - - break; - } - -// read the flash all at once - - case FLASH_Read:{ - - unsigned char *user_bytes; - volatile unsigned long read_addr; - unsigned int i; - - user_bytes = - &(((struct lcd_display *) arg)->RomImage[0]); - - if (!access_ok - (VERIFY_WRITE, user_bytes, FLASH_SIZE)) - return -EFAULT; - - pr_info(LCD "Reading Flash"); - for (i = 0; i < FLASH_SIZE; i++) { - unsigned char tmp_byte; - read_addr = kFlashBase + i; - tmp_byte = - *((volatile unsigned char *) - read_addr); - if (__put_user(tmp_byte, &user_bytes[i])) - return -EFAULT; - } - - - break; - } - - default: - return -EINVAL; - - } - - return 0; - -} - -static int lcd_open(struct inode *inode, struct file *file) -{ - if (!lcd_present) - return -ENXIO; - else - return 0; -} - -/* Only RESET or NEXT counts as button pressed */ - -static inline int button_pressed(void) -{ - unsigned long buttons = GPIRead; - - if ((buttons == BUTTON_Next) || (buttons == BUTTON_Next_B) - || (buttons == BUTTON_Reset_B)) - return buttons; - return 0; -} - -/* LED daemon sits on this and we wake him up once a key is pressed. */ - -static int lcd_waiters = 0; - -static ssize_t lcd_read(struct file *file, char *buf, - size_t count, loff_t *ofs) -{ - long buttons_now; - - if (lcd_waiters > 0) - return -EINVAL; - - lcd_waiters++; - while (((buttons_now = (long) button_pressed()) == 0) && - !(signal_pending(current))) { - msleep_interruptible(2000); - } - lcd_waiters--; - - if (signal_pending(current)) - return -ERESTARTSYS; - return buttons_now; -} - -/* - * The various file operations we support. - */ - -static struct file_operations lcd_fops = { - .read = lcd_read, - .ioctl = lcd_ioctl, - .open = lcd_open, -}; - -static struct miscdevice lcd_dev = { - MISC_DYNAMIC_MINOR, - "lcd", - &lcd_fops -}; - -static int lcd_init(void) -{ - int ret; - unsigned long data; - - pr_info("%s\n", LCD_DRIVER); - ret = misc_register(&lcd_dev); - if (ret) { - printk(KERN_WARNING LCD "Unable to register misc device.\n"); - return ret; - } - - /* Check region? Naaah! Just snarf it up. */ -/* request_region(RTC_PORT(0), RTC_IO_EXTENT, "lcd");*/ - - udelay(150); - data = LCDReadData; - if ((data & 0x000000FF) == (0x00)) { - lcd_present = 0; - pr_info(LCD "LCD Not Present\n"); - } else { - lcd_present = 1; - WRITE_GAL(kGal_DevBank2PReg, kGal_DevBank2Cfg); - WRITE_GAL(kGal_DevBank3PReg, kGal_DevBank3Cfg); - } - - return 0; -} - -static void __exit lcd_exit(void) -{ - misc_deregister(&lcd_dev); -} - -// -// Function: dqpoll -// -// Description: Polls the data lines to see if the flash is busy -// -// In: address, byte data -// -// Out: 0 = busy, 1 = write or erase complete -// -// - -static int dqpoll(volatile unsigned long address, volatile unsigned char data) -{ - volatile unsigned char dq7; - - dq7 = data & 0x80; - - return ((READ_FLASH(address) & 0x80) == dq7); -} - -// -// Function: timeout -// -// Description: Checks to see if erase or write has timed out -// By polling dq5 -// -// In: address -// -// -// Out: 0 = not timed out, 1 = timed out - -static int timeout(volatile unsigned long address) -{ - return (READ_FLASH(address) & 0x20) == 0x20; -} - -module_init(lcd_init); -module_exit(lcd_exit); - -MODULE_AUTHOR("Andrew Bose"); -MODULE_LICENSE("GPL"); |