如何把can总线驱动的补丁打到内核上？

Question

Index: linux-2.6-working/arch/arm/Kconfig
===================================================================
--- linux-2.6-working.orig/arch/arm/Kconfig 2006-01-19 17:41:46.000000000 +0000
+++ linux-2.6-working/arch/arm/Kconfig 2006-01-24 11:17:08.000000000 +0000
@@ -784,6 +784,8 @@

source "drivers/mmc/Kconfig"

+source "drivers/can/Kconfig"
+
endmenu

source "fs/Kconfig"
Index: linux-2.6-working/drivers/Kconfig
===================================================================
--- linux-2.6-working.orig/drivers/Kconfig 2006-01-19 17:41:46.000000000 +0000
+++ linux-2.6-working/drivers/Kconfig 2006-01-19 17:42:31.000000000 +0000
@@ -68,4 +68,6 @@

source "drivers/sn/Kconfig"

+source "drivers/can/Kconfig"
+
endmenu
Index: linux-2.6-working/drivers/Makefile
===================================================================
--- linux-2.6-working.orig/drivers/Makefile 2006-01-19 17:41:46.000000000 +0000
+++ linux-2.6-working/drivers/Makefile 2006-01-19 17:42:31.000000000 +0000
@@ -72,3 +72,4 @@
obj-y += firmware/
obj-$(CONFIG_CRYPTO) += crypto/
obj-$(CONFIG_SUPERH) += sh/
+obj-$(CONFIG_CAN) += can/
Index: linux-2.6-working/drivers/can/Kconfig
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6-working/drivers/can/Kconfig 2006-01-24 11:17:13.000000000 +0000
@@ -0,0 +1,17 @@
+menu "CAN support"
+
+config CAN
+ tristate "CAN support"
+ depends on NET
+ help
+ Controller Area Network (CAN) is a serial bus network used in
+ industrial and automotive control and monitoring applications.
+
+config CAN_DEBUG
+ boolean "Debug support for CAN drivers"
+ depends on CAN && DEBUG_KERNEL
+ help
+ Say "yes" to enable debug messaging (like dev_dbg and pr_debug),
+ sysfs, and debugfs support in CAN controller drivers.
+
+endmenu
Index: linux-2.6-working/drivers/can/Makefile
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6-working/drivers/can/Makefile 2006-01-24 11:17:13.000000000 +0000
@@ -0,0 +1,5 @@
+ifeq ($(CONFIG_CAN_DEBUG),y)
+EXTRA_CFLAGS += -DDEBUG
+endif
+
+obj-$(CONFIG_CAN) += can.o
Index: linux-2.6-working/drivers/can/can.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6-working/drivers/can/can.c 2006-01-24 11:17:36.000000000 +0000
@@ -0,0 +1,148 @@
+/*
+ * Controller Area Network (CAN) infrastructure.
+ *
+ * Copyright (C) 2006 Arcom Control Systems Ltd.
+ *
+ * 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.
+ */
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+#include <linux/can/can.h>
+
+
+ssize_t can_bit_rate_show(struct class_device *cdev, char *buf)
+{
+ struct can_device *can = to_can_device(cdev);
+ return sprintf(buf, "%d\n", can->get_bit_rate(can));
+}
+
+ssize_t can_bit_rate_store(struct class_device *cdev, const char *buf, size_t count)
+{
+ struct can_device *can = to_can_device(cdev);
+ int bit_rate;
+
+ if (netif_running(&can->ndev))
+ return -EBUSY;
+
+ bit_rate = simple_strtoul(buf, NULL, 0);
+ can->set_bit_rate(can, bit_rate);
+
+ return count;
+}
+
+CLASS_DEVICE_ATTR(bit_rate, 0644, can_bit_rate_show, can_bit_rate_store);
+
+
+static struct net_device_stats *can_get_stats(struct net_device *netdev)
+{
+ struct can_device *can = netdev->priv;
+
+ return &can->stats;
+}
+
+static void can_device_release(struct class_device *cdev)
+{
+ struct can_device *can = to_can_device(cdev);
+
+ class_device_remove_file(&can->cdev, &class_device_attr_bit_rate);
+
+ unregister_netdev(&can->ndev);
+
+ kfree(can);
+}
+
+static struct class can_device_class = {
+ .name = "can",
+ .owner = THIS_MODULE,
+ .release = can_device_release,
+};
+
+struct can_device * __init_or_module
+can_device_alloc(struct device *dev, unsigned size)
+{
+ struct can_device *can;
+
+ if (!dev)
+ return NULL;
+
+ can = kzalloc(size + sizeof(struct can_device), SLAB_KERNEL);
+ if (!can)
+ return NULL;
+
+ class_device_initialize(&can->cdev);
+ can->cdev.class = &can_device_class;
+ can->cdev.dev = get_device(dev);
+ can_device_set_devdata(can, &can[1]);
+
+ return can;
+}
+EXPORT_SYMBOL_GPL(can_device_alloc);
+
+int __init_or_module can_device_register(struct can_device *can)
+{
+ struct device *dev = can->cdev.dev;
+ int ret;
+
+ /* Network device initialization */
+ SET_NETDEV_DEV(&can->ndev, dev);
+ strcpy(can->ndev.name, "can%d");
+ can->ndev.get_stats = can_get_stats;
+ can->ndev.flags = IFF_NOARP | IFF_MULTICAST;
+ can->ndev.mtu = sizeof(struct can_frame);
+ can->ndev.tx_queue_len = 10;
+ can->ndev.priv = can;
+
+ ret = register_netdev(&can->ndev);
+ if (ret < 0) {
+ dev_err(dev, "network device registration failed (ret = %d)\n", ret);
+ goto error_net;
+ }
+
+ /* Use the network interface name as the class device id. */
+ strcpy(can->cdev.class_id, can->ndev.name);
+ ret = class_device_add(&can->cdev);
+ if (ret < 0)
+ goto error_class;
+
+ class_device_create_file(&can->cdev, &class_device_attr_bit_rate);
+
+ return 0;
+
+ error_class:
+ unregister_netdev(&can->ndev);
+ error_net:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(can_device_register);
+
+void can_device_unregister(struct can_device *can)
+{
+ class_device_unregister(&can->cdev);
+ can->cdev.dev = NULL;
+}
+EXPORT_SYMBOL_GPL(can_device_unregister);
+
+static int __init can_init(void)
+{
+ int ret;
+
+ ret = class_register(&can_device_class);
+ if (ret < 0)
+ goto error;
+ return 0;
+
+ error:
+ return ret;
+}
+
+subsys_initcall(can_init);
+
+MODULE_DESCRIPTION("CAN infrastructure");
+MODULE_LICENSE("GPL");
Index: linux-2.6-working/include/linux/can/can.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6-working/include/linux/can/can.h 2006-01-24 11:17:36.000000000 +0000
@@ -0,0 +1,107 @@
+/*
+ * Controller Area Network (CAN) infrastructure.
+ *
+ * Copyright (C) 2006 Arcom Control Systems Ltd.
+ *
+ * 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.
+ */
+#ifndef __LINUX_CAN_CAN_H
+#define __LINUX_CAN_CAN_H
+
+#define CAN_FRAME_MAX_DATA_LEN 8
+
+/**
+ * struct can_frame_header - Extended CAN frame header fields
+ * @id: 11 bit standard ID
+ * @srr: Substitute Remote Request bit
+ * @ide: Extended frame bit
+ * @eid: 18 bit extended ID
+ * @rtr: Remote Transmit Request bit
+ * @rb1: Reserved Bit 1
+ * @rb0: Reserved Bit 0
+ * @dlc: 4 bit Data Length Code
+ *
+ * For a standard frame ensure that ide == 0 and fill in only id, rtr and dlc.
+ *
+ * srs, rb1, and rb0 are unused and should be set to zero.
+ *
+ * Note: The memory layout does not correspond to the on-the-wire format for a
+ * CAN frame header.
+ */
+struct can_frame_header {
+ unsigned id:11;
+ unsigned srs:1;
+ unsigned ide:1;
+ unsigned eid:18;
+ unsigned rtr:1;
+ unsigned rb1:1;
+ unsigned rb0:1;
+ unsigned dlc:4;
+};
+
+/**
+ * struct can_frame - CAN frame header fields and data
+ * @header: CAN frame header
+ * @data: 8 bytes of data
+ *
+ * User space transmits and receives struct can_frame's via the network device
+ * socket interface.
+ *
+ * Note: The memory layout does not correspond to the on-the-wire format for a
+ * CAN frame.
+ */
+struct can_frame {
+ struct can_frame_header header;
+ uint8_t data[CAN_FRAME_MAX_DATA_LEN];
+};
+
+#ifdef __KERNEL__
+
+/**
+ * struct can_device - CAN controller class device
+ * @cdev: the class device
+ * @set_bit_rate: driver operation to set the CAN bus bit rate, may return
+ * -EINVAL if the requested bit rate isn't possible. This is only called
+ * if the network device is down.
+ * @get_bit_rate: driver operation to get the current CAN bus bit rate.
+ * @ndev: the network device
+ * @stats: the network device statistics
+ *
+ * The CAN controller driver must provide ndev.open, ndev.stop and
+ * ndev.hard_start_xmit before registering the CAN device.
+ */
+struct can_device {
+ struct class_device cdev;
+
+ int (*set_bit_rate)(struct can_device *can, int bit_rate);
+ int (*get_bit_rate)(struct can_device *can);
+
+ struct net_device ndev;
+ struct net_device_stats stats;
+};
+
+struct can_device * can_device_alloc(struct device *dev, unsigned size);
+int can_device_register(struct can_device *can);
+void can_device_unregister(struct can_device *can);
+
+static inline void *can_device_get_devdata(struct can_device *can)
+{
+ return class_get_devdata(&can->cdev);
+}
+
+static inline void can_device_set_devdata(struct can_device *can, void *data)
+{
+ class_set_devdata(&can->cdev, data);
+}
+
+static inline struct can_device *to_can_device(struct class_device *cdev)
+{
+ return cdev ? container_of(cdev, struct can_device, cdev) : NULL;
+}
+
+#endif /* __KERNEL__ */
+
+#endif /* !__LINUX_CAN_CAN_H */
Index: linux-2.6-working/Documentation/can/can-summary
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6-working/Documentation/can/can-summary 2006-01-24 11:18:16.000000000 +0000
@@ -0,0 +1,44 @@
+Controller Area Network (CAN) support
+=====================================
+
+Overview
+--------
+
+Controller Area Network (CAN) is a serial bus network commonly used in
+automotive and industrial control applications.
+
+CAN is (exclusively) a broadcast network, each node selects which frames to
+receive based on the ID (or extended ID) in the frame header.
+
+Two frame formats are specified in the CAN 2.0B specification: standard and
+extended. Standard frames have an 11 bit ID; extended an 29 bit ID (split
+into 11 bit standard ID the 18 bit extended ID). All frames have a Remote
+Transmit Request bit which may be set to request a remote node to transmit a
+response. Frames may have up to 8 octets of payload data.
+
+
+User space interface
+--------------------
+
+CAN frames are transmitted and received using a packet(7) socket bind(2)'ed to
+the CAN network device.
+
+Since a CAN frame is not a whole number of octets the CAN frame is
+encapsulated in a 'struct can_frame' which includes fields for the header and
+the payload. Note that the in-memory layout of 'struct can_frame' does not
+correspond to the on-the-wire format of the CAN frame.
+
+/sys/class/can/can?/bit_rate may be used to set/query the bit rate of the CAN
+bus.
+
+
+Todo
+----
+
+- a user-space interface that doesn't require root or CAP_NET_RAW and that
+ isn't a security risk. i.e., you shouldn't be able to open a non-CAN network
+ interface and send raw CAN frames down it.
+
+- hardware message filtering?
+
+- report bus errors to user-space (e.g., bus-passive and bus-off modes).

以上是补丁的源码，我是从网页上粘贴过来的。我把以上的源码存为can.patch文件。请问我如何把以上代码打到内核上。

[ 本帖最后由 kingreat 于 2008-2-29 16:11 编辑 ]