Commit 1207babd authored by Iliyan Malchev's avatar Iliyan Malchev Committed by Daniel Walker
Browse files

[ARM] msm: add /proc/last_radio_log when supported by the modem. 



Signed-off-by: default avatarIliyan Malchev <malchev@google.com>
Signed-off-by: default avatarDaniel Walker <dwalker@codeaurora.org>
parent 34f719b0

arch/arm/mach-msm/Makefile

+1 −0
Original line number Original line Diff line number Diff line
@@ -6,6 +6,7 @@ obj-y += acpuclock-arm11.o 
obj-y += clock.o clock-7x01a.o

obj-y += clock.o clock-7x01a.o





obj-$(CONFIG_MSM_SMD) += smd.o smd_debug.o

obj-$(CONFIG_MSM_SMD) += smd.o smd_debug.o

obj-$(CONFIG_MSM_SMD) += last_radio_log.o





obj-$(CONFIG_MACH_TROUT) += board-trout.o

obj-$(CONFIG_MACH_TROUT) += board-trout.o

obj-$(CONFIG_MACH_HALIBUT) += board-halibut.o
 
obj-$(CONFIG_MACH_HALIBUT) += board-halibut.o

arch/arm/mach-msm/last_radio_log.c

0 → 100644
+82 −0
Original line number Original line Diff line number Diff line 
/* arch/arm/mach-msm/last_radio_log.c

 *

 * Extract the log from a modem crash though SMEM

 *

 * Copyright (C) 2007 Google, Inc.

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 * may be copied, distributed, and modified under those terms.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 */



#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/fs.h>

#include <linux/proc_fs.h>

#include <linux/uaccess.h>



#include "smd_private.h"



static void *radio_log_base;

static size_t radio_log_size;



extern void *smem_item(unsigned id, unsigned *size);



static ssize_t last_radio_log_read(struct file *file, char __user *buf,

			size_t len, loff_t *offset)

{

	loff_t pos = *offset;

	ssize_t count;



	if (pos >= radio_log_size)

		return 0;



	count = min(len, (size_t)(radio_log_size - pos));

	if (copy_to_user(buf, radio_log_base + pos, count)) {

		pr_err("%s: copy to user failed\n", __func__);

		return -EFAULT;

	}



	*offset += count;

	return count;

}



static struct file_operations last_radio_log_fops = {

	.read = last_radio_log_read

};



void msm_init_last_radio_log(struct module *owner)

{

	struct proc_dir_entry *entry;



	if (last_radio_log_fops.owner) {

		pr_err("%s: already claimed\n", __func__);

		return;

	}



	radio_log_base = smem_item(SMEM_CLKREGIM_BSP, &radio_log_size);

	if (!radio_log_base) {

		pr_err("%s: could not retrieve SMEM_CLKREGIM_BSP\n", __func__);

		return;

	}



	entry = create_proc_entry("last_radio_log", S_IFREG | S_IRUGO, NULL);

	if (!entry) {

		pr_err("%s: could not create proc entry for radio log\n",

				__func__);

		return;

	}



	pr_err("%s: last radio log is %d bytes long\n", __func__,

		radio_log_size);

	last_radio_log_fops.owner = owner;

	entry->proc_fops = &last_radio_log_fops;

	entry->size = radio_log_size;

}

EXPORT_SYMBOL(msm_init_last_radio_log);

arch/arm/mach-msm/smd.c

+4 −0
Original line number Original line Diff line number Diff line
@@ -1038,6 +1038,8 @@ int smd_core_init(void) 
	return 0;

	return 0;

}

}





extern void msm_init_last_radio_log(struct module *);



static int __init msm_smd_probe(struct platform_device *pdev)

static int __init msm_smd_probe(struct platform_device *pdev)

{

{

	pr_info("smd_init()\n");

	pr_info("smd_init()\n");
@@ -1053,6 +1055,8 @@ static int __init msm_smd_probe(struct platform_device *pdev) 




	msm_check_for_modem_crash = check_for_modem_crash;

	msm_check_for_modem_crash = check_for_modem_crash;





	msm_init_last_radio_log(THIS_MODULE);



	smd_initialized = 1;

	smd_initialized = 1;





	return 0;

	return 0;