Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 683 insertions, 0 deletions

diff --git a/drivers/char/lcd.c b/drivers/char/lcd.c
new file mode 100644
index 0000000..cf01a72
--- /dev/null
+++ b/drivers/char/lcd.c
@@ -0,0 +1,683 @@
+/*
+ * 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 long lcd_read(struct inode *inode, struct file *file, char *buf,
+		     unsigned long count)
+{
+	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)
+{
+	unsigned long data;
+
+	pr_info("%s\n", LCD_DRIVER);
+	misc_register(&lcd_dev);
+
+	/* 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");