firmware: dell_rbu: Move dell_rbu to drivers/platform/x86
Move dell_rbu to the more appropriate directory drivers/platform/x86. Signed-off-by: Stuart Hayes <stuart.w.hayes@gmail.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Stuart Hayes
committed by
Andy Shevchenko
Andy Shevchenko
parent
12c956c4f3
commit
c48e2ffd71
@@ -230,6 +230,18 @@ config DELL_RBTN
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To compile this driver as a module, choose M here: the module will
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be called dell-rbtn.
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config DELL_RBU
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tristate "BIOS update support for DELL systems via sysfs"
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depends on X86
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select FW_LOADER
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select FW_LOADER_USER_HELPER
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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 communicate 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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config FUJITSU_LAPTOP
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tristate "Fujitsu Laptop Extras"
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@@ -23,6 +23,7 @@ obj-$(CONFIG_DELL_WMI_AIO) += dell-wmi-aio.o
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obj-$(CONFIG_DELL_WMI_LED) += dell-wmi-led.o
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obj-$(CONFIG_DELL_SMO8800) += dell-smo8800.o
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obj-$(CONFIG_DELL_RBTN) += dell-rbtn.o
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obj-$(CONFIG_DELL_RBU) += dell_rbu.o
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obj-$(CONFIG_ACER_WMI) += acer-wmi.o
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obj-$(CONFIG_ACER_WIRELESS) += acer-wireless.o
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obj-$(CONFIG_ACERHDF) += acerhdf.o
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753
drivers/platform/x86/dell_rbu.c
Normal file
753
drivers/platform/x86/dell_rbu.c
Normal file
@@ -0,0 +1,753 @@
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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/init.h>
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#include <linux/module.h>
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#include <linux/slab.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/platform_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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#include <asm/set_memory.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("3.2");
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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 num_packets;
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unsigned long packetsize;
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unsigned long imagesize;
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int entry_created;
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} rbu_data;
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static char image_type[MAX_IMAGE_LENGTH + 1] = "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,
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"BIOS image type. choose- mono or packet or init");
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static unsigned long allocation_floor = 0x100000;
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module_param(allocation_floor, ulong, 0644);
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MODULE_PARM_DESC(allocation_floor,
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"Minimum address for allocations when using Packet mode");
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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_read_count = 0;
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rbu_data.num_packets = 0;
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rbu_data.packetsize = 0;
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rbu_data.imagesize = 0;
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}
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static int create_packet(void *data, 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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int retval = 0;
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unsigned int packet_array_size = 0;
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void **invalid_addr_packet_array = NULL;
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void *packet_data_temp_buf = NULL;
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unsigned int idx = 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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retval = -EINVAL;
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goto out_noalloc;
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}
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spin_unlock(&rbu_data.lock);
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newpacket = kzalloc(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", __func__);
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retval = -ENOMEM;
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spin_lock(&rbu_data.lock);
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goto out_noalloc;
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}
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ordernum = get_order(length);
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/*
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* BIOS errata mean we cannot allocate packets below 1MB or they will
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* be overwritten by BIOS.
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*
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* array to temporarily hold packets
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* that are below the allocation floor
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*
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* NOTE: very simplistic because we only need the floor to be at 1MB
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* due to BIOS errata. This shouldn't be used for higher floors
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* or you will run out of mem trying to allocate the array.
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*/
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packet_array_size = max(
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(unsigned int)(allocation_floor / rbu_data.packetsize),
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(unsigned int)1);
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invalid_addr_packet_array = kcalloc(packet_array_size, sizeof(void *),
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GFP_KERNEL);
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if (!invalid_addr_packet_array) {
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printk(KERN_WARNING
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"dell_rbu:%s: failed to allocate "
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"invalid_addr_packet_array \n",
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__func__);
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retval = -ENOMEM;
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spin_lock(&rbu_data.lock);
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goto out_alloc_packet;
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}
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while (!packet_data_temp_buf) {
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packet_data_temp_buf = (unsigned char *)
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__get_free_pages(GFP_KERNEL, ordernum);
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if (!packet_data_temp_buf) {
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printk(KERN_WARNING
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"dell_rbu:%s: failed to allocate new "
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"packet\n", __func__);
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retval = -ENOMEM;
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spin_lock(&rbu_data.lock);
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goto out_alloc_packet_array;
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}
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if ((unsigned long)virt_to_phys(packet_data_temp_buf)
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< allocation_floor) {
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pr_debug("packet 0x%lx below floor at 0x%lx.\n",
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(unsigned long)virt_to_phys(
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packet_data_temp_buf),
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allocation_floor);
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invalid_addr_packet_array[idx++] = packet_data_temp_buf;
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packet_data_temp_buf = NULL;
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}
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}
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/*
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* set to uncachable or it may never get written back before reboot
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*/
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set_memory_uc((unsigned long)packet_data_temp_buf, 1 << ordernum);
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spin_lock(&rbu_data.lock);
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newpacket->data = packet_data_temp_buf;
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pr_debug("create_packet: newpacket at physical addr %lx\n",
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(unsigned long)virt_to_phys(newpacket->data));
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/* packets may not have fixed size */
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newpacket->length = length;
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newpacket->ordernum = ordernum;
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++rbu_data.num_packets;
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/* initialize the newly created packet headers */
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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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memcpy(newpacket->data, data, length);
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pr_debug("create_packet: exit \n");
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out_alloc_packet_array:
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/* always free packet array */
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for (;idx>0;idx--) {
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pr_debug("freeing unused packet below floor 0x%lx.\n",
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(unsigned long)virt_to_phys(
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invalid_addr_packet_array[idx-1]));
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free_pages((unsigned long)invalid_addr_packet_array[idx-1],
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ordernum);
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}
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kfree(invalid_addr_packet_array);
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out_alloc_packet:
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/* if error, free data */
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if (retval)
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kfree(newpacket);
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out_noalloc:
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return retval;
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}
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static int packetize_data(const u8 *data, size_t length)
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{
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int rc = 0;
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int done = 0;
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int packet_length;
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u8 *temp;
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u8 *end = (u8 *) data + length;
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pr_debug("packetize_data: data length %zd\n", length);
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if (!rbu_data.packetsize) {
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printk(KERN_WARNING
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"dell_rbu: packetsize not specified\n");
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return -EIO;
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}
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temp = (u8 *) data;
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/* packetize the hunk */
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while (!done) {
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if ((temp + rbu_data.packetsize) < end)
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packet_length = rbu_data.packetsize;
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else {
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/* this is the last packet */
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packet_length = end - temp;
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done = 1;
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}
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if ((rc = create_packet(temp, packet_length)))
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return rc;
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pr_debug("%p:%td\n", temp, (end - temp));
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temp += packet_length;
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}
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rbu_data.imagesize = length;
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return rc;
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}
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static int 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, &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
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* 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);
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set_memory_wb((unsigned long)newpacket->data,
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1 << newpacket->ordernum);
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free_pages((unsigned long) newpacket->data,
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newpacket->ordernum);
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kfree(newpacket);
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}
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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.imagesize = 0;
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}
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/*
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* img_update_free: Frees the buffer allocated for storing BIOS image
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* Always called with lock held and returned with lock held
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*/
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static void img_update_free(void)
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{
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if (!rbu_data.image_update_buffer)
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return;
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/*
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* zero out this buffer before freeing it to get rid of any stale
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* BIOS image copied in memory.
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*/
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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,
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rbu_data.image_update_buffer, dell_rbu_dmaaddr);
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else
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free_pages((unsigned long) rbu_data.image_update_buffer,
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rbu_data.image_update_ordernum);
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/*
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* Re-initialize the rbu_data variables after a free
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*/
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rbu_data.image_update_ordernum = -1;
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rbu_data.image_update_buffer = NULL;
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rbu_data.image_update_buffer_size = 0;
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rbu_data.bios_image_size = 0;
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rbu_data.dma_alloc = 0;
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}
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/*
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* img_update_realloc: This function allocates the contiguous pages to
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* accommodate the requested size of data. The memory address and size
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* values are stored globally and on every call to this function the new
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* size is checked to see if more data is required than the existing size.
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* If true the previous memory is freed and new allocation is done to
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* accommodate the new size. If the incoming size is less then than the
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* already allocated size, then that memory is reused. This function is
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* called with lock held and returns with lock held.
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*/
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static int img_update_realloc(unsigned long size)
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{
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unsigned char *image_update_buffer = NULL;
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unsigned long rc;
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unsigned long img_buf_phys_addr;
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int ordernum;
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int dma_alloc = 0;
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/*
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* check if the buffer of sufficient size has been
|
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* already allocated
|
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*/
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if (rbu_data.image_update_buffer_size >= size) {
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/*
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* check for corruption
|
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*/
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if ((size != 0) && (rbu_data.image_update_buffer == NULL)) {
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printk(KERN_ERR "dell_rbu:%s: corruption "
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"check failed\n", __func__);
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return -EINVAL;
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}
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/*
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* we have a valid pre-allocated buffer with
|
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* sufficient size
|
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*/
|
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return 0;
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}
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/*
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* free any previously allocated buffer
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*/
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img_update_free();
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spin_unlock(&rbu_data.lock);
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ordernum = get_order(size);
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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;
|
||||
|
||||
/* 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;
|
||||
}
|
||||
|
||||
if (pos > rbu_data.imagesize) {
|
||||
retval = 0;
|
||||
printk(KERN_WARNING "dell_rbu:read_packet_data: "
|
||||
"data underrun\n");
|
||||
goto read_rbu_data_exit;
|
||||
}
|
||||
|
||||
bytes_left = rbu_data.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) > rbu_data.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)
|
||||
{
|
||||
/* 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);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
return memory_read_from_buffer(buffer, count, &pos,
|
||||
rbu_data.image_update_buffer, rbu_data.bios_image_size);
|
||||
}
|
||||
|
||||
static ssize_t read_rbu_data(struct file *filp, struct kobject *kobj,
|
||||
struct bin_attribute *bin_attr,
|
||||
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 void callbackfn_rbu(const struct firmware *fw, void *context)
|
||||
{
|
||||
rbu_data.entry_created = 0;
|
||||
|
||||
if (!fw)
|
||||
return;
|
||||
|
||||
if (!fw->size)
|
||||
goto out;
|
||||
|
||||
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")) {
|
||||
/*
|
||||
* we need to free previous packets if a
|
||||
* new hunk of packets needs to be downloaded
|
||||
*/
|
||||
packet_empty_list();
|
||||
if (packetize_data(fw->data, fw->size))
|
||||
/* Incase something goes wrong when we are
|
||||
* in middle of packetizing the data, we
|
||||
* need to free up whatever packets might
|
||||
* have been created before we quit.
|
||||
*/
|
||||
packet_empty_list();
|
||||
} else
|
||||
pr_debug("invalid image type specified.\n");
|
||||
spin_unlock(&rbu_data.lock);
|
||||
out:
|
||||
release_firmware(fw);
|
||||
}
|
||||
|
||||
static ssize_t read_rbu_image_type(struct file *filp, struct kobject *kobj,
|
||||
struct bin_attribute *bin_attr,
|
||||
char *buffer, loff_t pos, size_t count)
|
||||
{
|
||||
int size = 0;
|
||||
if (!pos)
|
||||
size = scnprintf(buffer, count, "%s\n", image_type);
|
||||
return size;
|
||||
}
|
||||
|
||||
static ssize_t write_rbu_image_type(struct file *filp, struct kobject *kobj,
|
||||
struct bin_attribute *bin_attr,
|
||||
char *buffer, loff_t pos, size_t count)
|
||||
{
|
||||
int rc = count;
|
||||
int req_firm_rc = 0;
|
||||
int i;
|
||||
spin_lock(&rbu_data.lock);
|
||||
/*
|
||||
* Find the first newline or space
|
||||
*/
|
||||
for (i = 0; i < count; ++i)
|
||||
if (buffer[i] == '\n' || buffer[i] == ' ') {
|
||||
buffer[i] = '\0';
|
||||
break;
|
||||
}
|
||||
if (i == count)
|
||||
buffer[count] = '\0';
|
||||
|
||||
if (strstr(buffer, "mono"))
|
||||
strcpy(image_type, "mono");
|
||||
else if (strstr(buffer, "packet"))
|
||||
strcpy(image_type, "packet");
|
||||
else if (strstr(buffer, "init")) {
|
||||
/*
|
||||
* If due to the user error the driver gets in a bad
|
||||
* state where even though it is loaded , the
|
||||
* /sys/class/firmware/dell_rbu entries are missing.
|
||||
* to cover this situation the user can recreate entries
|
||||
* by writing init to image_type.
|
||||
*/
|
||||
if (!rbu_data.entry_created) {
|
||||
spin_unlock(&rbu_data.lock);
|
||||
req_firm_rc = request_firmware_nowait(THIS_MODULE,
|
||||
FW_ACTION_NOHOTPLUG, "dell_rbu",
|
||||
&rbu_device->dev, GFP_KERNEL, &context,
|
||||
callbackfn_rbu);
|
||||
if (req_firm_rc) {
|
||||
printk(KERN_ERR
|
||||
"dell_rbu:%s request_firmware_nowait"
|
||||
" failed %d\n", __func__, rc);
|
||||
rc = -EIO;
|
||||
} else
|
||||
rbu_data.entry_created = 1;
|
||||
|
||||
spin_lock(&rbu_data.lock);
|
||||
}
|
||||
} else {
|
||||
printk(KERN_WARNING "dell_rbu: image_type is invalid\n");
|
||||
spin_unlock(&rbu_data.lock);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* we must free all previous allocations */
|
||||
packet_empty_list();
|
||||
img_update_free();
|
||||
spin_unlock(&rbu_data.lock);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static ssize_t read_rbu_packet_size(struct file *filp, struct kobject *kobj,
|
||||
struct bin_attribute *bin_attr,
|
||||
char *buffer, loff_t pos, size_t count)
|
||||
{
|
||||
int size = 0;
|
||||
if (!pos) {
|
||||
spin_lock(&rbu_data.lock);
|
||||
size = scnprintf(buffer, count, "%lu\n", rbu_data.packetsize);
|
||||
spin_unlock(&rbu_data.lock);
|
||||
}
|
||||
return size;
|
||||
}
|
||||
|
||||
static ssize_t write_rbu_packet_size(struct file *filp, struct kobject *kobj,
|
||||
struct bin_attribute *bin_attr,
|
||||
char *buffer, loff_t pos, size_t count)
|
||||
{
|
||||
unsigned long temp;
|
||||
spin_lock(&rbu_data.lock);
|
||||
packet_empty_list();
|
||||
sscanf(buffer, "%lu", &temp);
|
||||
if (temp < 0xffffffff)
|
||||
rbu_data.packetsize = temp;
|
||||
|
||||
spin_unlock(&rbu_data.lock);
|
||||
return count;
|
||||
}
|
||||
|
||||
static struct bin_attribute rbu_data_attr = {
|
||||
.attr = {.name = "data", .mode = 0444},
|
||||
.read = read_rbu_data,
|
||||
};
|
||||
|
||||
static struct bin_attribute rbu_image_type_attr = {
|
||||
.attr = {.name = "image_type", .mode = 0644},
|
||||
.read = read_rbu_image_type,
|
||||
.write = write_rbu_image_type,
|
||||
};
|
||||
|
||||
static struct bin_attribute rbu_packet_size_attr = {
|
||||
.attr = {.name = "packet_size", .mode = 0644},
|
||||
.read = read_rbu_packet_size,
|
||||
.write = write_rbu_packet_size,
|
||||
};
|
||||
|
||||
static int __init dcdrbu_init(void)
|
||||
{
|
||||
int rc;
|
||||
spin_lock_init(&rbu_data.lock);
|
||||
|
||||
init_packet_head();
|
||||
rbu_device = platform_device_register_simple("dell_rbu", -1, NULL, 0);
|
||||
if (IS_ERR(rbu_device)) {
|
||||
printk(KERN_ERR
|
||||
"dell_rbu:%s:platform_device_register_simple "
|
||||
"failed\n", __func__);
|
||||
return PTR_ERR(rbu_device);
|
||||
}
|
||||
|
||||
rc = sysfs_create_bin_file(&rbu_device->dev.kobj, &rbu_data_attr);
|
||||
if (rc)
|
||||
goto out_devreg;
|
||||
rc = sysfs_create_bin_file(&rbu_device->dev.kobj, &rbu_image_type_attr);
|
||||
if (rc)
|
||||
goto out_data;
|
||||
rc = sysfs_create_bin_file(&rbu_device->dev.kobj,
|
||||
&rbu_packet_size_attr);
|
||||
if (rc)
|
||||
goto out_imtype;
|
||||
|
||||
rbu_data.entry_created = 0;
|
||||
return 0;
|
||||
|
||||
out_imtype:
|
||||
sysfs_remove_bin_file(&rbu_device->dev.kobj, &rbu_image_type_attr);
|
||||
out_data:
|
||||
sysfs_remove_bin_file(&rbu_device->dev.kobj, &rbu_data_attr);
|
||||
out_devreg:
|
||||
platform_device_unregister(rbu_device);
|
||||
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);
|
||||
|
||||
/* vim:noet:ts=8:sw=8
|
||||
*/
|
||||
Reference in New Issue
Block a user