diff options
Diffstat (limited to 'drivers/misc/modem_if_na/lte_modem_bootloader.c')
| -rw-r--r-- | drivers/misc/modem_if_na/lte_modem_bootloader.c | 320 |
1 files changed, 0 insertions, 320 deletions
diff --git a/drivers/misc/modem_if_na/lte_modem_bootloader.c b/drivers/misc/modem_if_na/lte_modem_bootloader.c deleted file mode 100644 index 0798b38..0000000 --- a/drivers/misc/modem_if_na/lte_modem_bootloader.c +++ /dev/null @@ -1,320 +0,0 @@ -/* Lte modem bootloader support for Samsung Tuna Board. - * - * Copyright (C) 2011 Google, Inc. - * Copyright (C) 2011 Samsung Electronics. - * - * 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/init.h> -#include <linux/module.h> -#include <linux/interrupt.h> -#include <linux/platform_device.h> -#include <linux/miscdevice.h> - -#include <linux/uaccess.h> -#include <linux/fs.h> -#include <linux/wait.h> -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/mutex.h> -#include <linux/irq.h> -#include <linux/gpio.h> -#include <linux/wakelock.h> -#include <linux/delay.h> -#include <linux/spi/spi.h> - -#include <linux/platform_data/lte_modem_bootloader.h> - -#define LEN_XMIT_DELEY 10 -#define MAX_XMIT_SIZE 16 - -int factory_mode; - -enum xmit_bootloader_status { - XMIT_BOOT_READY, - XMIT_LOADER_READY, -}; - -struct lte_modem_bootloader { - struct spi_device *spi_dev; - struct miscdevice dev; - - struct mutex lock; - - unsigned int gpio_lte2ap_status; - enum xmit_bootloader_status xmit_status; -}; -#define to_loader(misc) container_of(misc, struct lte_modem_bootloader, dev); - -static inline -int spi_xmit(struct lte_modem_bootloader *loader, - const char *buf, int size_per_xmit) -{ - int i; - int ret; - unsigned char xmit_buf[MAX_XMIT_SIZE]; - struct spi_message msg; - struct spi_transfer xfers[MAX_XMIT_SIZE]; - - memcpy(xmit_buf, buf, sizeof(xmit_buf)); - spi_message_init(&msg); - memset(xfers, 0, sizeof(xfers)); - for (i = 0; i < size_per_xmit ; i++) { - xfers[i].cs_change = 1; - xfers[i].len = 1; - xfers[i].tx_buf = xmit_buf + i; - spi_message_add_tail(&xfers[i], &msg); - } - ret = spi_sync(loader->spi_dev, &msg); - - if (ret < 0) - dev_err(&loader->spi_dev->dev, - "%s - error %d\n", __func__, ret); - - return ret; -} - - -static -int bootloader_write(struct lte_modem_bootloader *loader, - const char *addr, const int len) -{ - int i; - int ret = 0; - unsigned char lenbuf[4]; - - if (loader->xmit_status == XMIT_LOADER_READY) { - memcpy(lenbuf, &len, ARRAY_SIZE(lenbuf)); - ret = spi_xmit(loader, lenbuf, - ARRAY_SIZE(lenbuf)); - if (ret < 0) - return ret; - msleep(LEN_XMIT_DELEY); - } - - for (i = 0 ; i < len / MAX_XMIT_SIZE ; i++) { - ret = spi_xmit(loader, - addr + i * MAX_XMIT_SIZE, - MAX_XMIT_SIZE); - if (ret < 0) - return ret; - } - ret = spi_xmit(loader, addr + i * MAX_XMIT_SIZE , len % MAX_XMIT_SIZE); - - return 0; -} - - -static -int bootloader_open(struct inode *inode, struct file *flip) -{ - struct lte_modem_bootloader *loader = to_loader(flip->private_data); - flip->private_data = loader; - - return 0; -} - -static -long bootloader_ioctl(struct file *flip, - unsigned int cmd, unsigned long arg) -{ - int ret = 0; - int status; - struct lte_modem_bootloader_param param; - struct lte_modem_bootloader *loader = flip->private_data; - - mutex_lock(&loader->lock); - switch (cmd) { - case IOCTL_LTE_MODEM_XMIT_BOOT: - - ret = copy_from_user(¶m, (const void __user *)arg, - sizeof(param)); - if (ret) { - dev_err(&loader->spi_dev->dev, "%s - can not copy userdata\n", - __func__); - ret = -EFAULT; - goto exit_err; - } - - dev_info(&loader->spi_dev->dev, - "IOCTL_LTE_MODEM_XMIT_BOOT - bin size: %d\n", - param.len); - - ret = bootloader_write(loader, param.buf, param.len); - if (ret < 0) { - dev_err(&loader->spi_dev->dev, "failed to xmit boot bin\n"); - } else { - if (loader->xmit_status == XMIT_BOOT_READY) - loader->xmit_status = XMIT_LOADER_READY; - else - loader->xmit_status = XMIT_BOOT_READY; - } - - break; - case IOCTL_LTE_MODEM_LTE2AP_STATUS: - status = gpio_get_value(loader->gpio_lte2ap_status); - pr_debug("LTE2AP status :%d\n", status); - ret = copy_to_user((unsigned int *)arg, &status, - sizeof(status)); - - break; - - case IOCTL_LTE_MODEM_FACTORY_MODE_ON: - factory_mode = 1; - pr_info("usb %s, Factory Mode On\n", __func__); - break; - - case IOCTL_LTE_MODEM_FACTORY_MODE_OFF: - factory_mode = 0; - pr_info("usb %s, Factory Mode Off\n", __func__); - break; - - default: - dev_err(&loader->spi_dev->dev, - "%s - ioctl cmd error\n", - __func__); - ret = -ENOIOCTLCMD; - - break; - } - mutex_unlock(&loader->lock); - -exit_err: - return ret; -} - -static const struct file_operations lte_modem_bootloader_fops = { - .owner = THIS_MODULE, - .open = bootloader_open, - .unlocked_ioctl = bootloader_ioctl, -}; - -static -int bootloader_gpio_setup(struct lte_modem_bootloader *loader) -{ - if (!loader->gpio_lte2ap_status) - return -EINVAL; - - gpio_request(loader->gpio_lte2ap_status, "GPIO_LTE2AP_STATUS"); - gpio_direction_input(loader->gpio_lte2ap_status); - - return 0; -} - -static -int __devinit lte_modem_bootloader_probe(struct spi_device *spi) -{ - int ret; - - struct lte_modem_bootloader *loader; - struct lte_modem_bootloader_platform_data *pdata; - - loader = kzalloc(sizeof(*loader), GFP_KERNEL); - if (!loader) { - pr_err("failed to allocate for lte_modem_bootloader\n"); - ret = -ENOMEM; - goto err_alloc; - } - mutex_init(&loader->lock); - - spi->bits_per_word = 8; - - if (spi_setup(spi)) { - pr_err("failed to setup spi for lte_modem_bootloader\n"); - ret = -EINVAL; - goto err_setup; - } - - loader->spi_dev = spi; - - if (!spi->dev.platform_data) { - pr_err("failed to get platform data for lte_modem_bootloader\n"); - ret = -EINVAL; - goto err_setup; - } - pdata = (struct lte_modem_bootloader_platform_data *) \ - spi->dev.platform_data; - loader->gpio_lte2ap_status = pdata->gpio_lte2ap_status; - - ret = bootloader_gpio_setup(loader); - if (ret) { - pr_err("failed to set gpio for lte_modem_boot_loader\n"); - goto err_setup; - } - - loader->gpio_lte2ap_status = pdata->gpio_lte2ap_status; - loader->xmit_status = XMIT_BOOT_READY; - - spi_set_drvdata(spi, loader); - - loader->dev.minor = MISC_DYNAMIC_MINOR; - loader->dev.name = "lte_spi"; - loader->dev.fops = <e_modem_bootloader_fops; - ret = misc_register(&loader->dev); - if (ret) { - pr_err("failed to register misc dev for lte_modem_bootloader\n"); - goto err_setup; - } - pr_info("lte_modem_bootloader successfully probed\n"); - - factory_mode = 0; - - return 0; - -err_setup: - mutex_destroy(&loader->lock); - kfree(loader); - -err_alloc: - - return ret; -} - -static -int __devexit lte_modem_bootloader_remove(struct spi_device *spi) -{ - struct lte_modem_bootloader *loader = spi_get_drvdata(spi); - - misc_deregister(&loader->dev); - mutex_destroy(&loader->lock); - kfree(loader); - - return 0; -} - -static -struct spi_driver lte_modem_bootloader_driver = { - .driver = { - .name = "lte_modem_spi", - .bus = &spi_bus_type, - .owner = THIS_MODULE, - }, - .probe = lte_modem_bootloader_probe, - .remove = __devexit_p(lte_modem_bootloader_remove), -}; - -static -int __init lte_modem_bootloader_init(void) -{ - return spi_register_driver(<e_modem_bootloader_driver); -} - -static -void __exit lte_modem_bootloader_exit(void) -{ - spi_unregister_driver(<e_modem_bootloader_driver); -} - -module_init(lte_modem_bootloader_init); -module_exit(lte_modem_bootloader_exit); - -MODULE_DESCRIPTION("LTE Modem Bootloader driver"); -MODULE_LICENSE("GPL"); |