diff options
Diffstat (limited to 'drivers/misc/dbx500-mloader.c')
| -rw-r--r-- | drivers/misc/dbx500-mloader.c | 288 |
1 files changed, 288 insertions, 0 deletions
diff --git a/drivers/misc/dbx500-mloader.c b/drivers/misc/dbx500-mloader.c new file mode 100644 index 00000000000..408d1a1a29e --- /dev/null +++ b/drivers/misc/dbx500-mloader.c @@ -0,0 +1,288 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * Author: Ludovic Barre <ludovic.barre@stericsson.com> for ST-Ericsson. + * License terms: GNU General Public License (GPL), version 2 + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/fs.h> +#include <linux/errno.h> +#include <linux/types.h> +#include <linux/device.h> +#include <linux/miscdevice.h> +#include <linux/firmware.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/mm.h> +#include <linux/uaccess.h> +#include <linux/mman.h> +#include <linux/io.h> + +#include <mach/mloader-dbx500.h> +#include <linux/mloader.h> +#include <mach/hardware.h> + +#define DEVICE_NAME "dbx500_mloader_fw" + +struct mloader_priv { + struct platform_device *pdev; + struct dbx500_mloader_pdata *pdata; + struct miscdevice misc_dev; + u32 aeras_size; + void __iomem *uid_base; + u8 size; +}; + +static struct mloader_priv *mloader_priv; + +static int mloader_fw_send(struct dbx500_ml_fw *fw_info) +{ + const struct firmware *fw; + unsigned long size; + unsigned long phys_start; + void *fw_data; + void *vaddr; + void __iomem *ioaddr; + int ret; + + ret = request_firmware(&fw, fw_info->name, &mloader_priv->pdev->dev); + if (ret) { + dev_err(&mloader_priv->pdev->dev, "request firmware failed\n"); + goto out; + } + + if (fw->size > (fw_info->area->size - fw_info->offset)) { + dev_err(&mloader_priv->pdev->dev, + "fw:%s is too big for:%s\n", + fw_info->name, fw_info->area->name); + ret = -EINVAL; + goto err_fw; + } + + size = PAGE_ALIGN(fw->size); + phys_start = fw_info->area->start + fw_info->offset; + phys_start &= PAGE_MASK; + ioaddr = ioremap(phys_start, size); + if (!ioaddr) { + dev_err(&mloader_priv->pdev->dev, + "failed remap memory region.\n"); + ret = -EINVAL; + goto err_fw; + } + + vaddr = ioaddr + (fw_info->offset & ~PAGE_MASK); + fw_data = (void *)fw->data; + memcpy_toio(vaddr, fw_data, fw->size); + iounmap(ioaddr); + +err_fw: + release_firmware(fw); +out: + return ret; +} + +static int mloader_fw_upload(void) +{ + int i, ret; + struct dbx500_mloader_pdata *pdata = mloader_priv->pdata; + + for (i = 0; i < pdata->nr_fws; i++) { + ret = mloader_fw_send(&pdata->fws[i]); + if (ret) + goto err; + } + + return 0; +err: + dev_err(&mloader_priv->pdev->dev, + "Failed to upload %s firmware", pdata->fws[i].name); + return ret; +} + +static int mloader_fw_mmapdump(struct file *file, struct vm_area_struct *vma) +{ + int i; + unsigned long dump_size = 0; + unsigned long vma_start = vma->vm_start; + + if (vma->vm_flags & VM_WRITE) + return -EPERM; + + for (i = 0 ; i < mloader_priv->pdata->nr_areas ; i++) + dump_size += mloader_priv->pdata->areas[i].size; + + if ((vma->vm_end - vma->vm_start) < dump_size) + return -EINVAL; + + for (i = 0 ; i < mloader_priv->pdata->nr_areas ; i++) { + if (remap_pfn_range(vma, + vma_start, + mloader_priv->pdata->areas[i].start >> PAGE_SHIFT, + mloader_priv->pdata->areas[i].size, + vma->vm_page_prot)) + return -EAGAIN; + vma_start += mloader_priv->pdata->areas[i].size; + } + return 0; +} + +static void mloader_fw_dumpinfo(struct dump_image *images) +{ + u32 offset = 0; + int i; + + for (i = 0 ; i < mloader_priv->pdata->nr_areas ; i++) { + strncpy(images[i].name, + mloader_priv->pdata->areas[i].name, MAX_NAME); + images[i].name[MAX_NAME-1] = 0; + images[i].offset = offset; + images[i].size = mloader_priv->pdata->areas[i].size; + offset += mloader_priv->pdata->areas[i].size; + } +} + +static long mloader_fw_ioctl(struct file *filp, unsigned int cmd, + unsigned long arg) +{ + long ret = 0; + void __user *argp = (void __user *)arg; + + switch (cmd) { + case ML_UPLOAD: + ret = mloader_fw_upload(); + break; + case ML_GET_NBIMAGES: + ret = put_user(mloader_priv->pdata->nr_areas, + (unsigned long __user *)argp); + break; + case ML_GET_DUMPINFO: { + struct dump_image *dump_images; + dump_images = kzalloc(mloader_priv->pdata->nr_areas + * sizeof(struct dump_image), GFP_ATOMIC); + mloader_fw_dumpinfo(dump_images); + ret = copy_to_user(argp, (void *) dump_images, + mloader_priv->pdata->nr_areas + * sizeof(struct dump_image)) ? -EFAULT : 0; + kfree(dump_images); + break; + } + case ML_GET_FUSEINFO: { + ret = copy_to_user(argp, (void *) mloader_priv->uid_base, + mloader_priv->size) ? -EFAULT : 0; + break; + } + default: + ret = -EPERM; + break; + } + + return ret; +} + +static const struct file_operations modem_fw_fops = { + .owner = THIS_MODULE, + .unlocked_ioctl = mloader_fw_ioctl, + .mmap = mloader_fw_mmapdump, +}; + +static int __devinit mloader_fw_probe(struct platform_device *pdev) +{ + int ret = 0; + int i; + struct resource *res = NULL; + + mloader_priv = kzalloc(sizeof(*mloader_priv), GFP_ATOMIC); + if (!mloader_priv) { + ret = -ENOMEM; + goto out; + } + + mloader_priv->pdev = pdev; + mloader_priv->pdata = pdev->dev.platform_data; + + mloader_priv->misc_dev.minor = MISC_DYNAMIC_MINOR; + mloader_priv->misc_dev.name = DEVICE_NAME; + mloader_priv->misc_dev.fops = &modem_fw_fops; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mloader_priv->size = resource_size(res); + mloader_priv->uid_base = ioremap(res->start, mloader_priv->size); + + if (!mloader_priv->uid_base) { + ret = -ENOMEM; + goto err_free_priv; + } + + ret = misc_register(&mloader_priv->misc_dev); + if (ret < 0) { + dev_err(&pdev->dev, "can't misc_register\n"); + goto err_free_priv; + } + + dev_info(&mloader_priv->pdev->dev, "mloader device register\n"); + + for (i = 0 ; i < mloader_priv->pdata->nr_areas ; i++) { + dev_dbg(&mloader_priv->pdev->dev, + "Area:%d (name:%s start:%x size:%x)\n", + i, mloader_priv->pdata->areas[i].name, + mloader_priv->pdata->areas[i].start, + mloader_priv->pdata->areas[i].size); + } + + for (i = 0 ; i < mloader_priv->pdata->nr_fws ; i++) { + dev_dbg(&mloader_priv->pdev->dev, + "Firmware:%d (name:%s offset:%x " + "area_name:%s area_start:%x area_size:%x)\n", + i, mloader_priv->pdata->fws[i].name, + mloader_priv->pdata->fws[i].offset, + mloader_priv->pdata->fws[i].area->name, + mloader_priv->pdata->fws[i].area->start, + mloader_priv->pdata->fws[i].area->size); + } + + return ret; + +err_free_priv: + kfree(mloader_priv); +out: + return ret; +} + +static int __devexit mloader_fw_remove(struct platform_device *pdev) +{ + int err; + + err = misc_register(&mloader_priv->misc_dev); + if (err < 0) + dev_err(&pdev->dev, "can't misc_deregister, %d\n", err); + + kfree(mloader_priv); + + return err; +} + +static struct platform_driver mloader_fw_driver = { + .driver.name = DEVICE_NAME, + .driver.owner = THIS_MODULE, + .probe = mloader_fw_probe, + .remove = __devexit_p(mloader_fw_remove), +}; + +static int __init mloader_fw_init(void) +{ + return platform_driver_register(&mloader_fw_driver); +} + +static void __exit mloader_fw_exit(void) +{ + kfree(mloader_priv); + platform_driver_unregister(&mloader_fw_driver); +} + +module_init(mloader_fw_init); +module_exit(mloader_fw_exit); +MODULE_DESCRIPTION("ST-Ericsson modem loader firmware"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Ludovic Barre <ludovic.barre@stericsson.com>"); |