diff options
Diffstat (limited to 'arch/arm/mach-msm/reset_modem.c')
| -rw-r--r-- | arch/arm/mach-msm/reset_modem.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/arch/arm/mach-msm/reset_modem.c b/arch/arm/mach-msm/reset_modem.c new file mode 100644 index 000000000000..5d5b0f9a0620 --- /dev/null +++ b/arch/arm/mach-msm/reset_modem.c @@ -0,0 +1,226 @@ +/* Copyright (c) 2008-2009, Code Aurora Forum. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of Code Aurora Forum nor + * the names of its contributors may be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * Alternatively, provided that this notice is retained in full, this software + * may be relicensed by the recipient under the terms of the GNU General Public + * License version 2 ("GPL") and only version 2, in which case the provisions of + * the GPL apply INSTEAD OF those given above. If the recipient relicenses the + * software under the GPL, then the identification text in the MODULE_LICENSE + * macro must be changed to reflect "GPLv2" instead of "Dual BSD/GPL". Once a + * recipient changes the license terms to the GPL, subsequent recipients shall + * not relicense under alternate licensing terms, including the BSD or dual + * BSD/GPL terms. In addition, the following license statement immediately + * below and between the words START and END shall also then apply when this + * software is relicensed under the GPL: + * + * START + * + * This program is free software; you can redistribute it and/or modify it under + * the terms of the GNU General Public License version 2 and only version 2 as + * published by the Free Software Foundation. + * + * 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. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * END + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + */ +/* + * MSM architecture driver to reset the modem + */ +#include <linux/uaccess.h> +#include <linux/module.h> +#include <linux/fs.h> +#include <linux/miscdevice.h> + +#include "smd_private.h" +#include "proc_comm.h" + +#define DEBUG +/* #undef DEBUG */ +#ifdef DEBUG +#define D(x...) printk(x) +#else +#define D(x...) do {} while (0) +#endif + +static ssize_t reset_modem_read(struct file *fp, char __user *buf, + size_t count, loff_t *pos) +{ + return 0; +} + +static ssize_t reset_modem_write(struct file *fp, const char __user *buf, + size_t count, loff_t *pos) +{ + unsigned char cmd[64]; + int len; + int time; + int zero = 0; + int r; + + if (count < 1) + return 0; + + len = count > 63 ? 63 : count; + + if (copy_from_user(cmd, buf, len)) + return -EFAULT; + + cmd[len] = 0; + + /* lazy */ + if (cmd[len-1] == '\n') { + cmd[len-1] = 0; + len--; + } + + if (!strncmp(cmd, "wait", 4)) { + D(KERN_ERR "INFO:%s:%i:%s: " + "MODEM RESTART: WAIT\n", + __FILE__, + __LINE__, + __func__); + smsm_reset_modem(SMSM_MODEM_WAIT); + } else if (!strncmp(cmd, "continue", 8)) { + D(KERN_ERR "INFO:%s:%i:%s: " + "MODEM RESTART: CONTINUE\n", + __FILE__, + __LINE__, + __func__); + smsm_reset_modem_cont(); + } else if (!strncmp(cmd, "download", 8)) { + D(KERN_ERR "INFO:%s:%i:%s: " + "MODEM RESTART: DOWNLOAD\n", + __FILE__, + __LINE__, + __func__); + smsm_reset_modem(SMSM_SYSTEM_DOWNLOAD); + } else if (sscanf(cmd, "deferred reset %i", &time) == 1) { + D(KERN_ERR "INFO:%s:%i:%s: " + "MODEM RESTART: DEFERRED RESET %ims\n", + __FILE__, + __LINE__, + __func__, + time); + if (time == 0) { + r = 0; + msm_proc_comm_reset_modem_now(); + } else { + r = msm_proc_comm(PCOM_RESET_MODEM, &time, &zero); + } + if (r < 0) + return r; + } else if (!strncmp(cmd, "deferred reset", 14)) { + D(KERN_ERR "INFO:%s:%i:%s: " + "MODEM RESTART: DEFERRED RESET 0ms\n", + __FILE__, + __LINE__, + __func__); + r = 0; + msm_proc_comm_reset_modem_now(); + if (r < 0) + return r; + } else if (!strncmp(cmd, "reset chip now", 14)) { + uint param1 = 0x0; + uint param2 = 0x0; + + D(KERN_ERR "INFO:%s:%i:%s: " + "MODEM RESTART: CHIP RESET IMMEDIATE\n", + __FILE__, + __LINE__, + __func__); + + r = msm_proc_comm(PCOM_RESET_CHIP_IMM, ¶m1, ¶m2); + + if (r < 0) + return r; + } else if (!strncmp(cmd, "reset chip", 10)) { + + uint param1 = 0x0; + uint param2 = 0x0; + + D(KERN_ERR "INFO:%s:%i:%s: " + "MODEM RESTART: CHIP RESET \n", + __FILE__, + __LINE__, + __func__); + + r = msm_proc_comm(PCOM_RESET_CHIP, ¶m1, ¶m2); + + if (r < 0) + return r; + } else { /* if (!strncmp(cmd, "reset", 5)) */ + printk(KERN_ERR "INFO:%s:%i:%s: " + "MODEM RESTART: RESET\n", + __FILE__, + __LINE__, + __func__); + smsm_reset_modem(SMSM_RESET); + } + + return count; +} + +static int reset_modem_open(struct inode *ip, struct file *fp) +{ + return 0; +} + +static int reset_modem_release(struct inode *ip, struct file *fp) +{ + return 0; +} + +static const struct file_operations reset_modem_fops = { + .owner = THIS_MODULE, + .read = reset_modem_read, + .write = reset_modem_write, + .open = reset_modem_open, + .release = reset_modem_release, +}; + +static struct miscdevice reset_modem_dev = { + .minor = MISC_DYNAMIC_MINOR, + .name = "reset_modem", + .fops = &reset_modem_fops, +}; + +static int __init reset_modem_init(void) +{ + return misc_register(&reset_modem_dev); +} + +module_init(reset_modem_init); + +MODULE_DESCRIPTION("Reset Modem"); +MODULE_LICENSE("GPL v2"); |