56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
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/* arch/arm/mach-msm/htc_wifi_nvs.c
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*
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* Code to extract WiFi calibration information from ATAG set up
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* by the bootloader.
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*
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* Copyright (C) 2008 Google, Inc.
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* Author: Dmitry Shmidt <dimitrysh@google.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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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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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <asm/setup.h>
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/* configuration tags specific to msm */
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#define ATAG_MSM_WIFI 0x57494649 /* MSM WiFi */
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#define MAX_NVS_SIZE 0x800U
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static unsigned char wifi_nvs_ram[MAX_NVS_SIZE];
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unsigned char *get_wifi_nvs_ram( void )
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{
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return( wifi_nvs_ram );
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}
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EXPORT_SYMBOL(get_wifi_nvs_ram);
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static int __init parse_tag_msm_wifi(const struct tag *tag)
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{
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unsigned char *dptr = (unsigned char *)(&tag->u);
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unsigned size;
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size = min((tag->hdr.size - 2) * sizeof(__u32), MAX_NVS_SIZE);
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#ifdef ATAG_MSM_WIFI_DEBUG
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unsigned i;
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printk("WiFi Data size = %d , 0x%x\n", tag->hdr.size, tag->hdr.tag);
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for (i = 0; i < size; i++)
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printk("%02x ", *dptr++);
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#endif
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memcpy( (void *)wifi_nvs_ram, (void *)dptr, size );
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return 0;
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}
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__tagtable(ATAG_MSM_WIFI, parse_tag_msm_wifi);
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