diff options
author | Iliyan Malchev <malchev@google.com> | 2009-11-15 18:16:43 -0800 |
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committer | Daniel Walker <dwalker@codeaurora.org> | 2010-05-12 09:15:24 -0700 |
commit | 1207babdcdfe5501d1528c86b445a9d1045ecc01 (patch) | |
tree | e1fab45d892ab8998575066e1e9355274d0f8e43 /arch/arm/mach-msm | |
parent | 34f719b0c25cca6e11164f926fc798c25499aa96 (diff) | |
download | op-kernel-dev-1207babdcdfe5501d1528c86b445a9d1045ecc01.zip op-kernel-dev-1207babdcdfe5501d1528c86b445a9d1045ecc01.tar.gz |
[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/mach-msm')
-rw-r--r-- | arch/arm/mach-msm/Makefile | 1 | ||||
-rw-r--r-- | arch/arm/mach-msm/last_radio_log.c | 82 | ||||
-rw-r--r-- | arch/arm/mach-msm/smd.c | 4 |
3 files changed, 87 insertions, 0 deletions
diff --git a/arch/arm/mach-msm/Makefile b/arch/arm/mach-msm/Makefile index 9c3c401..147339c 100644 --- a/arch/arm/mach-msm/Makefile +++ b/arch/arm/mach-msm/Makefile @@ -6,6 +6,7 @@ obj-y += acpuclock-arm11.o obj-y += clock.o clock-7x01a.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_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 0000000..b64ba5a --- /dev/null +++ b/arch/arm/mach-msm/last_radio_log.c @@ -0,0 +1,82 @@ +/* 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); diff --git a/arch/arm/mach-msm/smd.c b/arch/arm/mach-msm/smd.c index 34bcc32..655fe42 100644 --- a/arch/arm/mach-msm/smd.c +++ b/arch/arm/mach-msm/smd.c @@ -1038,6 +1038,8 @@ int smd_core_init(void) return 0; } +extern void msm_init_last_radio_log(struct module *); + static int __init msm_smd_probe(struct platform_device *pdev) { 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_init_last_radio_log(THIS_MODULE); + smd_initialized = 1; return 0; |