--- /dev/null
+/*
+ * drivers/amlogic/firmware/bl40_module.c
+ *
+ * Copyright (C) 2017 Amlogic, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ */
+
+#define pr_fmt(fmt) "bl40: " fmt
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/io.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/mutex.h>
+#include <linux/device.h>
+#include <linux/timer.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/reset.h>
+#include <linux/dma-mapping.h>
+#include <linux/uaccess.h>
+#include <linux/miscdevice.h>
+#include <linux/clk.h>
+#include <asm/cacheflush.h>
+#include <linux/firmware.h>
+#include <linux/arm-smccc.h>
+#include <linux/platform_device.h>
+#include <linux/of_device.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/amlogic/scpi_protocol.h>
+
+#define AMLOGIC_BL40_BOOTUP 0x8200004E
+struct bl40_info {
+ char name[30];
+};
+
+struct device *device;
+#define BL40_IOC_MAGIC 'H'
+#define BL40_FIRMWARE_LOAD _IOWR(BL40_IOC_MAGIC, 1, struct bl40_info)
+
+static long bl40_miscdev_ioctl(struct file *fp, unsigned int cmd,
+ unsigned long arg)
+{
+ int ret = 0;
+ const struct firmware *firmware;
+ void __user *argp = (void __user *)arg;
+ struct bl40_info bl40_info;
+ unsigned long phy_addr;
+ void *virt_addr = NULL;
+ struct arm_smccc_res res = {0};
+ size_t size;
+
+ switch (cmd) {
+ case BL40_FIRMWARE_LOAD:
+ ret = copy_from_user((void *)&bl40_info,
+ argp, sizeof(bl40_info));
+ if (ret < 0)
+ return ret;
+ ret = request_firmware(&firmware, bl40_info.name, device);
+ if (ret < 0) {
+ pr_err("req firmware fail %d\n", ret);
+ return ret;
+ }
+
+ size = firmware->size;
+ virt_addr = devm_kzalloc(device, size, GFP_KERNEL);
+ if (!virt_addr) {
+ release_firmware(firmware);
+ pr_err("memory request fail\n");
+ return -ENOMEM;
+ }
+ memcpy(virt_addr, firmware->data, size);
+ release_firmware(firmware);
+ dma_map_single(device, virt_addr, size, DMA_FROM_DEVICE);
+ phy_addr = virt_to_phys(virt_addr);
+
+ /* unlock bl40 */
+ scpi_unlock_bl40();
+ arm_smccc_smc(AMLOGIC_BL40_BOOTUP, phy_addr,
+ size, 0, 0, 0, 0, 0, &res);
+ pr_info("free memory\n");
+ devm_kfree(device, virt_addr);
+ ret = res.a0;
+ break;
+ default:
+ pr_info("Not have this cmd\n");
+ break;
+ };
+ pr_info("bl40 ioctl\n");
+ return ret;
+}
+
+static const struct file_operations bl40_miscdev_fops = {
+ .owner = THIS_MODULE,
+ .open = simple_open,
+ .unlocked_ioctl = bl40_miscdev_ioctl,
+ .compat_ioctl = bl40_miscdev_ioctl,
+};
+
+static struct miscdevice bl40_miscdev = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "bl40",
+ .fops = &bl40_miscdev_fops,
+};
+
+static int bl40_platform_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ device = &pdev->dev;
+ platform_set_drvdata(pdev, NULL);
+ ret = misc_register(&bl40_miscdev);
+ pr_info("bl40 probe\n");
+ return ret;
+}
+
+static int bl40_platform_remove(struct platform_device *pdev)
+{
+ misc_deregister(&bl40_miscdev);
+ platform_set_drvdata(pdev, NULL);
+ return 0;
+}
+
+static const struct of_device_id bl40_device_id[] = {
+ {
+ .compatible = "amlogic, bl40-bootup",
+ },
+ {}
+};
+
+static struct platform_driver bl40_platform_driver = {
+ .driver = {
+ .name = "bl40",
+ .owner = THIS_MODULE,
+ .of_match_table = bl40_device_id,
+ },
+ .probe = bl40_platform_probe,
+ .remove = bl40_platform_remove,
+};
+module_platform_driver(bl40_platform_driver);
+
+MODULE_AUTHOR("Amlogic Bl40");
+MODULE_DESCRIPTION("BL40 Boot Module Driver");
+MODULE_LICENSE("GPL v2");
projects / platform / kernel / linux-amlogic.git / commitdiff