[PATCH] dell_rbu: new Dell BIOS update driver
Remote BIOS Update driver for updating BIOS images on Dell servers and desktops. See dell_rbu.txt for details. Signed-off-by: Abhay Salunke <Abhay_Salunke@dell.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Jens Axboe <axboe@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Abhay Salunke
Linus Torvalds
Родитель
6e3eaab020
Коммит
6c54c28e69
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@ -0,0 +1,74 @@
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Purpose:
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Demonstrate the usage of the new open sourced rbu (Remote BIOS Update) driver
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for updating BIOS images on Dell servers and desktops.
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Scope:
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This document discusses the functionality of the rbu driver only.
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It does not cover the support needed from aplications to enable the BIOS to
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update itself with the image downloaded in to the memory.
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Overview:
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This driver works with Dell OpenManage or Dell Update Packages for updating
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the BIOS on Dell servers (starting from servers sold since 1999), desktops
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and notebooks (starting from those sold in 2005).
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Please go to http://support.dell.com register and you can find info on
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OpenManage and Dell Update packages (DUP).
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Dell_RBU driver supports BIOS update using the monilothic image and packetized
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image methods. In case of moniolithic the driver allocates a contiguous chunk
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of physical pages having the BIOS image. In case of packetized the app
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using the driver breaks the image in to packets of fixed sizes and the driver
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would place each packet in contiguous physical memory. The driver also
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maintains a link list of packets for reading them back.
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If the dell_rbu driver is unloaded all the allocated memory is freed.
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The rbu driver needs to have an application which will inform the BIOS to
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enable the update in the next system reboot.
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The user should not unload the rbu driver after downloading the BIOS image
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or updating.
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The driver load creates the following directories under the /sys file system.
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/sys/class/firmware/dell_rbu/loading
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/sys/class/firmware/dell_rbu/data
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/sys/devices/platform/dell_rbu/image_type
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/sys/devices/platform/dell_rbu/data
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The driver supports two types of update mechanism; monolithic and packetized.
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These update mechanism depends upon the BIOS currently running on the system.
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Most of the Dell systems support a monolithic update where the BIOS image is
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copied to a single contiguous block of physical memory.
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In case of packet mechanism the single memory can be broken in smaller chuks
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of contiguous memory and the BIOS image is scattered in these packets.
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By default the driver uses monolithic memory for the update type. This can be
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changed to contiguous during the driver load time by specifying the load
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parameter image_type=packet. This can also be changed later as below
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echo packet > /sys/devices/platform/dell_rbu/image_type
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Do the steps below to download the BIOS image.
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1) echo 1 > /sys/class/firmware/dell_rbu/loading
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2) cp bios_image.hdr /sys/class/firmware/dell_rbu/data
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3) echo 0 > /sys/class/firmware/dell_rbu/loading
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The /sys/class/firmware/dell_rbu/ entries will remain till the following is
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done.
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echo -1 > /sys/class/firmware/dell_rbu/loading
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Until this step is completed the drivr cannot be unloaded.
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Also the driver provides /sys/devices/platform/dell_rbu/data readonly file to
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read back the image downloaded. This is useful in case of packet update
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mechanism where the above steps 1,2,3 will repeated for every packet.
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By reading the /sys/devices/platform/dell_rbu/data file all packet data
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downloaded can be verified in a single file.
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The packets are arranged in this file one after the other in a FIFO order.
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NOTE:
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This driver requires a patch for firmware_class.c which has the addition
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of request_firmware_nowait_nohotplug function to wortk
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Also after updating the BIOS image an user mdoe application neeeds to execute
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code which message the BIOS update request to the BIOS. So on the next reboot
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the BIOS knows about the new image downloaded and it updates it self.
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Also don't unload the rbu drive if the image has to be updated.
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@ -58,4 +58,13 @@ config EFI_PCDP
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See <http://www.dig64.org/specifications/DIG64_HCDPv20_042804.pdf>
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config DELL_RBU
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tristate "BIOS update support for DELL systems via sysfs"
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select FW_LOADER
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help
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Say m if you want to have the option of updating the BIOS for your
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DELL system. Note you need a Dell OpenManage or Dell Update package (DUP)
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supporting application to comunicate with the BIOS regarding the new
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image for the image update to take effect.
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See <file:Documentation/dell_rbu.txt> for more details on the driver.
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endmenu
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@ -4,3 +4,4 @@
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obj-$(CONFIG_EDD) += edd.o
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obj-$(CONFIG_EFI_VARS) += efivars.o
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obj-$(CONFIG_EFI_PCDP) += pcdp.o
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obj-$(CONFIG_DELL_RBU) += dell_rbu.o
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@ -0,0 +1,634 @@
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/*
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* dell_rbu.c
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* Bios Update driver for Dell systems
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* Author: Dell Inc
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* Abhay Salunke <abhay_salunke@dell.com>
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*
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* Copyright (C) 2005 Dell Inc.
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*
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* Remote BIOS Update (rbu) driver is used for updating DELL BIOS by
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* creating entries in the /sys file systems on Linux 2.6 and higher
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* kernels. The driver supports two mechanism to update the BIOS namely
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* contiguous and packetized. Both these methods still require having some
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* application to set the CMOS bit indicating the BIOS to update itself
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* after a reboot.
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*
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* Contiguous method:
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* This driver writes the incoming data in a monolithic image by allocating
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* contiguous physical pages large enough to accommodate the incoming BIOS
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* image size.
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*
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* Packetized method:
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* The driver writes the incoming packet image by allocating a new packet
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* on every time the packet data is written. This driver requires an
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* application to break the BIOS image in to fixed sized packet chunks.
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*
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* See Documentation/dell_rbu.txt for more info.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License v2.0 as published by
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* the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/version.h>
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#include <linux/config.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/blkdev.h>
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#include <linux/device.h>
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#include <linux/spinlock.h>
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#include <linux/moduleparam.h>
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#include <linux/firmware.h>
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#include <linux/dma-mapping.h>
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MODULE_AUTHOR("Abhay Salunke <abhay_salunke@dell.com>");
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MODULE_DESCRIPTION("Driver for updating BIOS image on DELL systems");
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MODULE_LICENSE("GPL");
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MODULE_VERSION("1.0");
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#define BIOS_SCAN_LIMIT 0xffffffff
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#define MAX_IMAGE_LENGTH 16
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static struct _rbu_data {
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void *image_update_buffer;
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unsigned long image_update_buffer_size;
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unsigned long bios_image_size;
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int image_update_ordernum;
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int dma_alloc;
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spinlock_t lock;
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unsigned long packet_read_count;
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unsigned long packet_write_count;
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unsigned long num_packets;
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unsigned long packetsize;
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} rbu_data;
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static char image_type[MAX_IMAGE_LENGTH] = "mono";
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module_param_string(image_type, image_type, sizeof(image_type), 0);
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MODULE_PARM_DESC(image_type, "BIOS image type. choose- mono or packet");
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struct packet_data {
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struct list_head list;
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size_t length;
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void *data;
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int ordernum;
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};
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static struct packet_data packet_data_head;
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static struct platform_device *rbu_device;
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static int context;
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static dma_addr_t dell_rbu_dmaaddr;
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static void init_packet_head(void)
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{
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INIT_LIST_HEAD(&packet_data_head.list);
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rbu_data.packet_write_count = 0;
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rbu_data.packet_read_count = 0;
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rbu_data.num_packets = 0;
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rbu_data.packetsize = 0;
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}
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static int fill_last_packet(void *data, size_t length)
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{
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struct list_head *ptemp_list;
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struct packet_data *packet = NULL;
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int packet_count = 0;
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pr_debug("fill_last_packet: entry \n");
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if (!rbu_data.num_packets) {
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pr_debug("fill_last_packet: num_packets=0\n");
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return -ENOMEM;
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}
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packet_count = rbu_data.num_packets;
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ptemp_list = (&packet_data_head.list)->prev;
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packet = list_entry(ptemp_list, struct packet_data, list);
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if ((rbu_data.packet_write_count + length) > rbu_data.packetsize) {
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pr_debug("dell_rbu:%s: packet size data "
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"overrun\n", __FUNCTION__);
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return -EINVAL;
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}
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pr_debug("fill_last_packet : buffer = %p\n", packet->data);
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memcpy((packet->data + rbu_data.packet_write_count), data, length);
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if ((rbu_data.packet_write_count + length) == rbu_data.packetsize) {
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/*
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* this was the last data chunk in the packet
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* so reinitialize the packet data counter to zero
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*/
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rbu_data.packet_write_count = 0;
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} else
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rbu_data.packet_write_count += length;
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pr_debug("fill_last_packet: exit \n");
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return 0;
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}
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static int create_packet(size_t length)
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{
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struct packet_data *newpacket;
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int ordernum = 0;
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pr_debug("create_packet: entry \n");
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if (!rbu_data.packetsize) {
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pr_debug("create_packet: packetsize not specified\n");
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return -EINVAL;
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}
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newpacket = kmalloc(sizeof(struct packet_data), GFP_KERNEL);
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if (!newpacket) {
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printk(KERN_WARNING
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"dell_rbu:%s: failed to allocate new "
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"packet\n", __FUNCTION__);
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return -ENOMEM;
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}
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ordernum = get_order(length);
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/*
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* there is no upper limit on memory
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* address for packetized mechanism
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*/
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newpacket->data = (unsigned char *)__get_free_pages(GFP_KERNEL,
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ordernum);
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pr_debug("create_packet: newpacket %p\n", newpacket->data);
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if (!newpacket->data) {
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printk(KERN_WARNING
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"dell_rbu:%s: failed to allocate new "
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"packet\n", __FUNCTION__);
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kfree(newpacket);
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return -ENOMEM;
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}
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newpacket->ordernum = ordernum;
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++rbu_data.num_packets;
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/*
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* initialize the newly created packet headers
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*/
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INIT_LIST_HEAD(&newpacket->list);
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list_add_tail(&newpacket->list, &packet_data_head.list);
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/*
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* packets have fixed size
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*/
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newpacket->length = rbu_data.packetsize;
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pr_debug("create_packet: exit \n");
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return 0;
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}
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static int packetize_data(void *data, size_t length)
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{
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int rc = 0;
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if (!rbu_data.packet_write_count) {
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if ((rc = create_packet(length)))
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return rc;
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}
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if ((rc = fill_last_packet(data, length)))
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return rc;
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return rc;
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}
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static int
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do_packet_read(char *data, struct list_head *ptemp_list,
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int length, int bytes_read, int *list_read_count)
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{
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void *ptemp_buf;
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struct packet_data *newpacket = NULL;
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int bytes_copied = 0;
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int j = 0;
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newpacket = list_entry(ptemp_list, struct packet_data, list);
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*list_read_count += newpacket->length;
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if (*list_read_count > bytes_read) {
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/* point to the start of unread data */
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j = newpacket->length - (*list_read_count - bytes_read);
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/* point to the offset in the packet buffer */
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ptemp_buf = (u8 *) newpacket->data + j;
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/*
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* check if there is enough room in
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* * the incoming buffer
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*/
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if (length > (*list_read_count - bytes_read))
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/*
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* copy what ever is there in this
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* packet and move on
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*/
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bytes_copied = (*list_read_count - bytes_read);
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else
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/* copy the remaining */
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bytes_copied = length;
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memcpy(data, ptemp_buf, bytes_copied);
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}
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return bytes_copied;
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}
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static int packet_read_list(char *data, size_t * pread_length)
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{
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struct list_head *ptemp_list;
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int temp_count = 0;
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int bytes_copied = 0;
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int bytes_read = 0;
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int remaining_bytes = 0;
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char *pdest = data;
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/* check if we have any packets */
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if (0 == rbu_data.num_packets)
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return -ENOMEM;
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remaining_bytes = *pread_length;
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bytes_read = rbu_data.packet_read_count;
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ptemp_list = (&packet_data_head.list)->next;
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while (!list_empty(ptemp_list)) {
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bytes_copied = do_packet_read(pdest, ptemp_list,
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remaining_bytes, bytes_read,
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&temp_count);
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remaining_bytes -= bytes_copied;
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bytes_read += bytes_copied;
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pdest += bytes_copied;
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/*
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* check if we reached end of buffer before reaching the
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* last packet
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*/
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if (remaining_bytes == 0)
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break;
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ptemp_list = ptemp_list->next;
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}
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/*finally set the bytes read */
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*pread_length = bytes_read - rbu_data.packet_read_count;
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rbu_data.packet_read_count = bytes_read;
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return 0;
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}
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static void packet_empty_list(void)
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{
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struct list_head *ptemp_list;
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struct list_head *pnext_list;
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struct packet_data *newpacket;
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ptemp_list = (&packet_data_head.list)->next;
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while (!list_empty(ptemp_list)) {
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newpacket =
|
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list_entry(ptemp_list, struct packet_data, list);
|
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pnext_list = ptemp_list->next;
|
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list_del(ptemp_list);
|
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ptemp_list = pnext_list;
|
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/*
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* zero out the RBU packet memory before freeing
|
||||
* to make sure there are no stale RBU packets left in memory
|
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*/
|
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memset(newpacket->data, 0, rbu_data.packetsize);
|
||||
free_pages((unsigned long)newpacket->data,
|
||||
newpacket->ordernum);
|
||||
kfree(newpacket);
|
||||
}
|
||||
rbu_data.packet_write_count = 0;
|
||||
rbu_data.packet_read_count = 0;
|
||||
rbu_data.num_packets = 0;
|
||||
rbu_data.packetsize = 0;
|
||||
}
|
||||
|
||||
/*
|
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* img_update_free: Frees the buffer allocated for storing BIOS image
|
||||
* Always called with lock held and returned with lock held
|
||||
*/
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||||
static void img_update_free(void)
|
||||
{
|
||||
if (!rbu_data.image_update_buffer)
|
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return;
|
||||
/*
|
||||
* zero out this buffer before freeing it to get rid of any stale
|
||||
* BIOS image copied in memory.
|
||||
*/
|
||||
memset(rbu_data.image_update_buffer, 0,
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||||
rbu_data.image_update_buffer_size);
|
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if (rbu_data.dma_alloc == 1)
|
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dma_free_coherent(NULL, rbu_data.bios_image_size,
|
||||
rbu_data.image_update_buffer,
|
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dell_rbu_dmaaddr);
|
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else
|
||||
free_pages((unsigned long)rbu_data.image_update_buffer,
|
||||
rbu_data.image_update_ordernum);
|
||||
|
||||
/*
|
||||
* Re-initialize the rbu_data variables after a free
|
||||
*/
|
||||
rbu_data.image_update_ordernum = -1;
|
||||
rbu_data.image_update_buffer = NULL;
|
||||
rbu_data.image_update_buffer_size = 0;
|
||||
rbu_data.bios_image_size = 0;
|
||||
rbu_data.dma_alloc = 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* img_update_realloc: This function allocates the contiguous pages to
|
||||
* accommodate the requested size of data. The memory address and size
|
||||
* values are stored globally and on every call to this function the new
|
||||
* size is checked to see if more data is required than the existing size.
|
||||
* If true the previous memory is freed and new allocation is done to
|
||||
* accommodate the new size. If the incoming size is less then than the
|
||||
* already allocated size, then that memory is reused. This function is
|
||||
* called with lock held and returns with lock held.
|
||||
*/
|
||||
static int img_update_realloc(unsigned long size)
|
||||
{
|
||||
unsigned char *image_update_buffer = NULL;
|
||||
unsigned long rc;
|
||||
unsigned long img_buf_phys_addr;
|
||||
int ordernum;
|
||||
int dma_alloc = 0;
|
||||
|
||||
/*
|
||||
* check if the buffer of sufficient size has been
|
||||
* already allocated
|
||||
*/
|
||||
if (rbu_data.image_update_buffer_size >= size) {
|
||||
/*
|
||||
* check for corruption
|
||||
*/
|
||||
if ((size != 0) && (rbu_data.image_update_buffer == NULL)) {
|
||||
printk(KERN_ERR "dell_rbu:%s: corruption "
|
||||
"check failed\n", __FUNCTION__);
|
||||
return -EINVAL;
|
||||
}
|
||||
/*
|
||||
* we have a valid pre-allocated buffer with
|
||||
* sufficient size
|
||||
*/
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* free any previously allocated buffer
|
||||
*/
|
||||
img_update_free();
|
||||
|
||||
spin_unlock(&rbu_data.lock);
|
||||
|
||||
ordernum = get_order(size);
|
||||
image_update_buffer =
|
||||
(unsigned char *)__get_free_pages(GFP_KERNEL, ordernum);
|
||||
|
||||
img_buf_phys_addr =
|
||||
(unsigned long)virt_to_phys(image_update_buffer);
|
||||
|
||||
if (img_buf_phys_addr > BIOS_SCAN_LIMIT) {
|
||||
free_pages((unsigned long)image_update_buffer, ordernum);
|
||||
ordernum = -1;
|
||||
image_update_buffer = dma_alloc_coherent(NULL, size,
|
||||
&dell_rbu_dmaaddr,
|
||||
GFP_KERNEL);
|
||||
dma_alloc = 1;
|
||||
}
|
||||
|
||||
spin_lock(&rbu_data.lock);
|
||||
|
||||
if (image_update_buffer != NULL) {
|
||||
rbu_data.image_update_buffer = image_update_buffer;
|
||||
rbu_data.image_update_buffer_size = size;
|
||||
rbu_data.bios_image_size =
|
||||
rbu_data.image_update_buffer_size;
|
||||
rbu_data.image_update_ordernum = ordernum;
|
||||
rbu_data.dma_alloc = dma_alloc;
|
||||
rc = 0;
|
||||
} else {
|
||||
pr_debug("Not enough memory for image update:"
|
||||
"size = %ld\n", size);
|
||||
rc = -ENOMEM;
|
||||
}
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static ssize_t read_packet_data(char *buffer, loff_t pos, size_t count)
|
||||
{
|
||||
int retval;
|
||||
size_t bytes_left;
|
||||
size_t data_length;
|
||||
char *ptempBuf = buffer;
|
||||
unsigned long imagesize;
|
||||
|
||||
/* check to see if we have something to return */
|
||||
if (rbu_data.num_packets == 0) {
|
||||
pr_debug("read_packet_data: no packets written\n");
|
||||
retval = -ENOMEM;
|
||||
goto read_rbu_data_exit;
|
||||
}
|
||||
|
||||
imagesize = rbu_data.num_packets * rbu_data.packetsize;
|
||||
|
||||
if (pos > imagesize) {
|
||||
retval = 0;
|
||||
printk(KERN_WARNING "dell_rbu:read_packet_data: "
|
||||
"data underrun\n");
|
||||
goto read_rbu_data_exit;
|
||||
}
|
||||
|
||||
bytes_left = imagesize - pos;
|
||||
data_length = min(bytes_left, count);
|
||||
|
||||
if ((retval = packet_read_list(ptempBuf, &data_length)) < 0)
|
||||
goto read_rbu_data_exit;
|
||||
|
||||
if ((pos + count) > imagesize) {
|
||||
rbu_data.packet_read_count = 0;
|
||||
/* this was the last copy */
|
||||
retval = bytes_left;
|
||||
} else
|
||||
retval = count;
|
||||
|
||||
read_rbu_data_exit:
|
||||
return retval;
|
||||
}
|
||||
|
||||
static ssize_t read_rbu_mono_data(char *buffer, loff_t pos, size_t count)
|
||||
{
|
||||
unsigned char *ptemp = NULL;
|
||||
size_t bytes_left = 0;
|
||||
size_t data_length = 0;
|
||||
ssize_t ret_count = 0;
|
||||
|
||||
/* check to see if we have something to return */
|
||||
if ((rbu_data.image_update_buffer == NULL) ||
|
||||
(rbu_data.bios_image_size == 0)) {
|
||||
pr_debug("read_rbu_data_mono: image_update_buffer %p ,"
|
||||
"bios_image_size %lu\n",
|
||||
rbu_data.image_update_buffer,
|
||||
rbu_data.bios_image_size);
|
||||
ret_count = -ENOMEM;
|
||||
goto read_rbu_data_exit;
|
||||
}
|
||||
|
||||
if (pos > rbu_data.bios_image_size) {
|
||||
ret_count = 0;
|
||||
goto read_rbu_data_exit;
|
||||
}
|
||||
|
||||
bytes_left = rbu_data.bios_image_size - pos;
|
||||
data_length = min(bytes_left, count);
|
||||
|
||||
ptemp = rbu_data.image_update_buffer;
|
||||
memcpy(buffer, (ptemp + pos), data_length);
|
||||
|
||||
if ((pos + count) > rbu_data.bios_image_size)
|
||||
/* this was the last copy */
|
||||
ret_count = bytes_left;
|
||||
else
|
||||
ret_count = count;
|
||||
read_rbu_data_exit:
|
||||
return ret_count;
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
read_rbu_data(struct kobject *kobj, char *buffer, loff_t pos, size_t count)
|
||||
{
|
||||
ssize_t ret_count = 0;
|
||||
|
||||
spin_lock(&rbu_data.lock);
|
||||
|
||||
if (!strcmp(image_type, "mono"))
|
||||
ret_count = read_rbu_mono_data(buffer, pos, count);
|
||||
else if (!strcmp(image_type, "packet"))
|
||||
ret_count = read_packet_data(buffer, pos, count);
|
||||
else
|
||||
pr_debug("read_rbu_data: invalid image type specified\n");
|
||||
|
||||
spin_unlock(&rbu_data.lock);
|
||||
return ret_count;
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
read_rbu_image_type(struct kobject *kobj, char *buffer, loff_t pos,
|
||||
size_t count)
|
||||
{
|
||||
int size = 0;
|
||||
if (!pos)
|
||||
size = sprintf(buffer, "%s\n", image_type);
|
||||
return size;
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
write_rbu_image_type(struct kobject *kobj, char *buffer, loff_t pos,
|
||||
size_t count)
|
||||
{
|
||||
int rc = count;
|
||||
spin_lock(&rbu_data.lock);
|
||||
|
||||
if (strlen(buffer) < MAX_IMAGE_LENGTH)
|
||||
sscanf(buffer, "%s", image_type);
|
||||
else
|
||||
printk(KERN_WARNING "dell_rbu: image_type is invalid"
|
||||
"max chars = %d, \n incoming str--%s-- \n",
|
||||
MAX_IMAGE_LENGTH, buffer);
|
||||
|
||||
/* we must free all previous allocations */
|
||||
packet_empty_list();
|
||||
img_update_free();
|
||||
|
||||
spin_unlock(&rbu_data.lock);
|
||||
return rc;
|
||||
|
||||
}
|
||||
|
||||
static struct bin_attribute rbu_data_attr = {
|
||||
.attr = {.name = "data",.owner = THIS_MODULE,.mode = 0444},
|
||||
.read = read_rbu_data,
|
||||
};
|
||||
|
||||
static struct bin_attribute rbu_image_type_attr = {
|
||||
.attr = {.name = "image_type",.owner = THIS_MODULE,.mode = 0644},
|
||||
.read = read_rbu_image_type,
|
||||
.write = write_rbu_image_type,
|
||||
};
|
||||
|
||||
static void callbackfn_rbu(const struct firmware *fw, void *context)
|
||||
{
|
||||
int rc = 0;
|
||||
|
||||
if (!fw || !fw->size)
|
||||
return;
|
||||
|
||||
spin_lock(&rbu_data.lock);
|
||||
if (!strcmp(image_type, "mono")) {
|
||||
if (!img_update_realloc(fw->size))
|
||||
memcpy(rbu_data.image_update_buffer,
|
||||
fw->data, fw->size);
|
||||
} else if (!strcmp(image_type, "packet")) {
|
||||
if (!rbu_data.packetsize)
|
||||
rbu_data.packetsize = fw->size;
|
||||
else if (rbu_data.packetsize != fw->size) {
|
||||
packet_empty_list();
|
||||
rbu_data.packetsize = fw->size;
|
||||
}
|
||||
packetize_data(fw->data, fw->size);
|
||||
} else
|
||||
pr_debug("invalid image type specified.\n");
|
||||
spin_unlock(&rbu_data.lock);
|
||||
|
||||
rc = request_firmware_nowait(THIS_MODULE, FW_ACTION_NOHOTPLUG,
|
||||
"dell_rbu", &rbu_device->dev,
|
||||
&context, callbackfn_rbu);
|
||||
if (rc)
|
||||
printk(KERN_ERR
|
||||
"dell_rbu:%s request_firmware_nowait failed"
|
||||
" %d\n", __FUNCTION__, rc);
|
||||
}
|
||||
|
||||
static int __init dcdrbu_init(void)
|
||||
{
|
||||
int rc = 0;
|
||||
spin_lock_init(&rbu_data.lock);
|
||||
|
||||
init_packet_head();
|
||||
rbu_device =
|
||||
platform_device_register_simple("dell_rbu", -1, NULL, 0);
|
||||
if (!rbu_device) {
|
||||
printk(KERN_ERR
|
||||
"dell_rbu:%s:platform_device_register_simple "
|
||||
"failed\n", __FUNCTION__);
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
sysfs_create_bin_file(&rbu_device->dev.kobj, &rbu_data_attr);
|
||||
sysfs_create_bin_file(&rbu_device->dev.kobj, &rbu_image_type_attr);
|
||||
|
||||
rc = request_firmware_nowait(THIS_MODULE, FW_ACTION_NOHOTPLUG,
|
||||
"dell_rbu", &rbu_device->dev,
|
||||
&context, callbackfn_rbu);
|
||||
if (rc)
|
||||
printk(KERN_ERR "dell_rbu:%s:request_firmware_nowait"
|
||||
" failed %d\n", __FUNCTION__, rc);
|
||||
|
||||
return rc;
|
||||
|
||||
}
|
||||
|
||||
static __exit void dcdrbu_exit(void)
|
||||
{
|
||||
spin_lock(&rbu_data.lock);
|
||||
packet_empty_list();
|
||||
img_update_free();
|
||||
spin_unlock(&rbu_data.lock);
|
||||
platform_device_unregister(rbu_device);
|
||||
}
|
||||
|
||||
module_exit(dcdrbu_exit);
|
||||
module_init(dcdrbu_init);
|
||||
Загрузка…
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