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authorIliyan Malchev <malchev@google.com>2009-11-15 21:16:43 -0500
committerDaniel Walker <dwalker@codeaurora.org>2010-05-12 12:15:24 -0400
commit1207babdcdfe5501d1528c86b445a9d1045ecc01 (patch)
treee1fab45d892ab8998575066e1e9355274d0f8e43 /arch/arm
parent34f719b0c25cca6e11164f926fc798c25499aa96 (diff)
[ARM] msm: add /proc/last_radio_log when supported by the modem.
Signed-off-by: Iliyan Malchev <malchev@google.com> Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-msm/Makefile1
-rw-r--r--arch/arm/mach-msm/last_radio_log.c82
-rw-r--r--arch/arm/mach-msm/smd.c4
3 files changed, 87 insertions, 0 deletions
diff --git a/arch/arm/mach-msm/Makefile b/arch/arm/mach-msm/Makefile
index 9c3c4019da8a..147339c87277 100644
--- a/arch/arm/mach-msm/Makefile
+++ b/arch/arm/mach-msm/Makefile
@@ -6,6 +6,7 @@ obj-y += acpuclock-arm11.o
6obj-y += clock.o clock-7x01a.o 6obj-y += clock.o clock-7x01a.o
7 7
8obj-$(CONFIG_MSM_SMD) += smd.o smd_debug.o 8obj-$(CONFIG_MSM_SMD) += smd.o smd_debug.o
9obj-$(CONFIG_MSM_SMD) += last_radio_log.o
9 10
10obj-$(CONFIG_MACH_TROUT) += board-trout.o 11obj-$(CONFIG_MACH_TROUT) += board-trout.o
11obj-$(CONFIG_MACH_HALIBUT) += board-halibut.o 12obj-$(CONFIG_MACH_HALIBUT) += board-halibut.o
diff --git a/arch/arm/mach-msm/last_radio_log.c b/arch/arm/mach-msm/last_radio_log.c
new file mode 100644
index 000000000000..b64ba5a98686
--- /dev/null
+++ b/arch/arm/mach-msm/last_radio_log.c
@@ -0,0 +1,82 @@
1/* arch/arm/mach-msm/last_radio_log.c
2 *
3 * Extract the log from a modem crash though SMEM
4 *
5 * Copyright (C) 2007 Google, Inc.
6 *
7 * This software is licensed under the terms of the GNU General Public
8 * License version 2, as published by the Free Software Foundation, and
9 * may be copied, distributed, and modified under those terms.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 */
17
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/fs.h>
21#include <linux/proc_fs.h>
22#include <linux/uaccess.h>
23
24#include "smd_private.h"
25
26static void *radio_log_base;
27static size_t radio_log_size;
28
29extern void *smem_item(unsigned id, unsigned *size);
30
31static ssize_t last_radio_log_read(struct file *file, char __user *buf,
32 size_t len, loff_t *offset)
33{
34 loff_t pos = *offset;
35 ssize_t count;
36
37 if (pos >= radio_log_size)
38 return 0;
39
40 count = min(len, (size_t)(radio_log_size - pos));
41 if (copy_to_user(buf, radio_log_base + pos, count)) {
42 pr_err("%s: copy to user failed\n", __func__);
43 return -EFAULT;
44 }
45
46 *offset += count;
47 return count;
48}
49
50static struct file_operations last_radio_log_fops = {
51 .read = last_radio_log_read
52};
53
54void msm_init_last_radio_log(struct module *owner)
55{
56 struct proc_dir_entry *entry;
57
58 if (last_radio_log_fops.owner) {
59 pr_err("%s: already claimed\n", __func__);
60 return;
61 }
62
63 radio_log_base = smem_item(SMEM_CLKREGIM_BSP, &radio_log_size);
64 if (!radio_log_base) {
65 pr_err("%s: could not retrieve SMEM_CLKREGIM_BSP\n", __func__);
66 return;
67 }
68
69 entry = create_proc_entry("last_radio_log", S_IFREG | S_IRUGO, NULL);
70 if (!entry) {
71 pr_err("%s: could not create proc entry for radio log\n",
72 __func__);
73 return;
74 }
75
76 pr_err("%s: last radio log is %d bytes long\n", __func__,
77 radio_log_size);
78 last_radio_log_fops.owner = owner;
79 entry->proc_fops = &last_radio_log_fops;
80 entry->size = radio_log_size;
81}
82EXPORT_SYMBOL(msm_init_last_radio_log);
diff --git a/arch/arm/mach-msm/smd.c b/arch/arm/mach-msm/smd.c
index 34bcc327aa88..655fe42506ca 100644
--- a/arch/arm/mach-msm/smd.c
+++ b/arch/arm/mach-msm/smd.c
@@ -1038,6 +1038,8 @@ int smd_core_init(void)
1038 return 0; 1038 return 0;
1039} 1039}
1040 1040
1041extern void msm_init_last_radio_log(struct module *);
1042
1041static int __init msm_smd_probe(struct platform_device *pdev) 1043static int __init msm_smd_probe(struct platform_device *pdev)
1042{ 1044{
1043 pr_info("smd_init()\n"); 1045 pr_info("smd_init()\n");
@@ -1053,6 +1055,8 @@ static int __init msm_smd_probe(struct platform_device *pdev)
1053 1055
1054 msm_check_for_modem_crash = check_for_modem_crash; 1056 msm_check_for_modem_crash = check_for_modem_crash;
1055 1057
1058 msm_init_last_radio_log(THIS_MODULE);
1059
1056 smd_initialized = 1; 1060 smd_initialized = 1;
1057 1061
1058 return 0; 1062 return 0;