tqm_led.patch

linux交叉编译环境个软件和内核的补丁。

+ diff -u linux-2.2.13/arch/ppc/8xx_io/Makefile.ORIG linux-2.2.13/arch/ppc/8xx_io/Makefile
--- linux-2.2.13/arch/ppc/8xx_io/Makefile.ORIG	Fri Oct 22 23:27:14 1999
+++ linux-2.2.13/arch/ppc/8xx_io/Makefile	Sun Jan  9 00:00:14 2000
@@ -36,4 +36,6 @@
 O_OBJS += iic.o
 endif
 
+O_OBJS += tqm_led.o
+
 include $(TOPDIR)/Rules.make
+ diff -u linux-2.2.13/arch/ppc/8xx_io/tqm_led.c.ORIG linux-2.2.13/arch/ppc/8xx_io/tqm_led.c
--- linux-2.2.13/arch/ppc/8xx_io/tqm_led.c.ORIG	Sat Jan  8 23:18:48 2000
+++ linux-2.2.13/arch/ppc/8xx_io/tqm_led.c	Tue Nov 16 00:39:35 1999
@@ -0,0 +1,273 @@
+/*
+ * Copyright (C) 1999
+ * DENX Software Engineering
+ * Wolfgang Denk, [e-mail]
+ * All rights reserved.
+ */
+
+
+/*
+ * Standard in kernel modules
+ */
+#include <linux/kernel.h>	/* We're doing kernel work	*/
+#include <linux/module.h>	/* Specifically, a module	*/
+#include <asm/uaccess.h>	/* for put_user			*/
+#include <asm/init.h>		/* for __initfunc		*/
+#include <asm/8xx_immap.h>
+#include <asm/mpc8xx.h>
+
+extern cpm8xx_t *cpmp;		/* Pointer to comm processor	*/
+
+#undef	DEBUG
+
+#ifdef	DEBUG
+# define debugk(fmt,args...)	printk(fmt ,##args)
+#else
+# define debugk(fmt,args...)
+#endif
+
+/*
+ * Deal with CONFIG_MODVERSIONS
+ */
+#if CONFIG_MODVERSIONS==1
+# define MODVERSIONS
+# include <linux/modversions.h>
+#endif
+
+/*
+ * For character devices
+ */
+#include <linux/fs.h>		/* character device definitions	*/
+#include <linux/wrapper.h>	/* wrapper for compatibility with future versions */
+
+#ifndef KERNEL_VERSION
+# define KERNEL_VERSION(a,b,c)	((a)*65536+(b)*256+(c))
+#endif
+
+#define	DEBUG	1
+#define SUCCESS 0
+
+#define	LED_MAJOR	42	/* free for demo/sample use	*/
+
+/*
+ * Device Declarations 
+ */
+
+/*
+ * The name for our device, as it will appear in /proc/devices
+ */
+#define DEVICE_NAME "TQM_LED"
+
+/*
+ * prevent concurent access of the same device
+ */
+static int Device_Open = 0;
+
+/*
+ * Prototypes
+ */
+int led_init (void );
+static int device_open(struct inode *, struct file *);
+static int device_release(struct inode *, struct file *);
+static ssize_t device_read(struct file *, char *, size_t, loff_t *);
+static ssize_t device_write(struct file *, const char *, size_t, loff_t *);
+int init_module(void);
+void cleanup_module(void);
+
+struct file_operations led_ops =
+{
+	NULL,			/* seek		*/
+	device_read,
+	device_write,
+	NULL,			/* readdir	*/
+	NULL,			/* select	*/
+	NULL,			/* ioctl	*/
+	NULL,			/* mmap		*/
+	device_open,
+	NULL,			/* flush	*/
+	device_release		/* close	*/
+};
+
+static int Major;
+
+/*
+ * Initialize the driver - Register the character device
+ */
+__initfunc( int led_init (void) )
+{
+	/*
+	 * Register the character device
+	 */
+	Major = register_chrdev (LED_MAJOR, DEVICE_NAME, &led_ops);
+
+	/* Negative values signify an error */
+	if (Major < 0) {
+		printk ("TQM_LED init_module: failed with %d\n", Major);
+		return Major;
+	}
+
+	printk ("TQM_LED registred: major = %d\n", LED_MAJOR);
+	return 0;
+}
+
+/*
+ * called whenever a process attempts to open the device
+ */
+static int device_open (struct inode *inode, struct file *file)
+{
+	volatile cpm8xx_t *cp = cpmp;
+
+	debugk ("device_open(%p,%p)\n", inode, file);
+
+	/*
+	 * Get major / minor numbers when needed
+	 */
+	debugk ("Device: %d.%d\n", inode->i_rdev >> 8, inode->i_rdev & 0xFF);
+
+	/*
+	 * exclusive open only
+	 */
+	if (Device_Open) {
+		return -EBUSY;
+	}
+
+	/*
+	 * Be careful here on SMP kernels!
+	 */
+	Device_Open++;
+
+	/*
+	 * Make sure that the module isn't removed while
+	 * the file is open by incrementing the usage count
+	 */
+	MOD_INC_USE_COUNT;
+
+	debugk ("LED_OPEN: pbdir=0x%x  pbpar=0x%x  pbodr=0x%x  pbdat=0x%x\n",
+		cp->cp_pbdir, cp->cp_pbpar, cp->cp_pbodr, cp->cp_pbdat);
+
+	cp->cp_pbdat |= 0x0000003F;
+
+	cp->cp_pbdir |= 0x0000003F;
+
+	debugk ("LED_OPEN: pbdir=0x%x  pbpar=0x%x  pbodr=0x%x  pbdat=0x%x\n",
+		cp->cp_pbdir, cp->cp_pbpar, cp->cp_pbodr, cp->cp_pbdat);
+
+	return SUCCESS;
+}
+
+
+/*
+ * Called when a process closes the device.
+ * Doesn't have a return value in version 2.0.x because it can't fail,
+ * but in version 2.2.x it is allowed to fail
+ */
+static int device_release (struct inode *inode, struct file *file)
+{
+	volatile cpm8xx_t *cp = cpmp;
+
+	debugk ("device_release(%p,%p)\n", inode, file);
+
+	/* We're now ready for our next caller */
+	Device_Open--;
+
+	MOD_DEC_USE_COUNT;
+
+	debugk ("LED_CLOSE: pbdir=0x%x  pbpar=0x%x  pbodr=0x%x  pbdat=0x%x\n",
+		cp->cp_pbdir, cp->cp_pbpar, cp->cp_pbodr, cp->cp_pbdat);
+
+	cp->cp_pbdir &= 0xFFFFFFC0;
+
+	cp->cp_pbdat &= 0xFFFFFFC0;
+
+	debugk ("LED_CLOSE: pbdir=0x%x  pbpar=0x%x  pbodr=0x%x  pbdat=0x%x\n",
+		cp->cp_pbdir, cp->cp_pbpar, cp->cp_pbodr, cp->cp_pbdat);
+
+	return 0;
+}
+
+
+/*
+ * read entry point:
+ */
+
+static ssize_t device_read (struct file *file,
+			    char *buffer,	/* The buffer to fill with data */
+			    size_t length,	/* The length of the buffer */
+			    loff_t * offset)	/* Our offset in the file */
+{
+	volatile cpm8xx_t *cp = cpmp;
+
+	unsigned char c = cp->cp_pbdat & 0x0000003F;
+
+	put_user (c, buffer);
+
+	debugk ("Read: value = 0x%02x\n", c);
+
+	return (1);		/* read() always returns exactly one byte */
+}
+
+
+
+
+/*
+ * write entry point: dummy here
+ */
+static ssize_t device_write (struct file *file,
+			     const char *buffer,	/* buffer */
+			     size_t length,		/* length of buffer */
+			     loff_t * offset)		/* offset in the file */
+{
+	volatile cpm8xx_t *cp = cpmp;
+	size_t len = length;
+	int error;
+
+	unsigned char c;
+
+	while (length-- > 0) {
+		unsigned int pbdat = cp->cp_pbdat & 0xFFFFFFC0;
+
+		if ((error = get_user (c, buffer++)) != 0) {
+			return (error);
+		}
+		c &= 0x3F;
+
+		cp->cp_pbdat = pbdat | (unsigned int)c;
+	}
+	return (len);
+}
+
+
+/******************************
+ **** Module Declarations *****
+ **************************** */
+
+#ifdef MODULE
+/*
+ * Initialize the module
+ */
+int init_module (void)
+{
+	return led_init();
+}
+
+/*
+ * Cleanup - unregister the appropriate file from /proc
+ */
+void cleanup_module (void)
+{
+	int ret;
+
+	/*
+	 * Unregister the device
+	 */
+	ret = module_unregister_chrdev (Major, DEVICE_NAME);
+
+	/*
+	 * If there's an error, report it
+	 */
+	if (ret < 0) {
+		printk ("unregister_chrdev: error %d\n", ret);
+	}
+}
+
+#endif	/* MODULE */
+ diff -u linux-2.2.13/drivers/char/mem.c.ORIG linux-2.2.13/drivers/char/mem.c
--- linux-2.2.13/drivers/char/mem.c.ORIG	Mon Oct 25 00:49:19 1999
+++ linux-2.2.13/drivers/char/mem.c	Sat Jan  8 23:45:05 2000
@@ -686,5 +686,6 @@
 #ifdef CONFIG_VIDEO_DEV
 	videodev_init();
 #endif
+	led_init();	/* initialize TQM LED driver */
 	return 0;
 }