1 // SPDX-License-Identifier: GPL-2.0-only
3  * Rockchip Secure OTP Driver
6  * Author: Hisping <hisping.lin@rock-chips.com>
15 #include <linux/nvmem-provider.h>
36 	int size;  member
39 	int (*init)(struct rockchip_otp *otp);
44 	if (ver->impl_id == TEE_IMPL_ID_OPTEE)  in optee_ctx_match()
51  * func: read data from non-protected oem zone in secure otp
71 		return -EINVAL;  in rockchip_read_oem_non_protected_otp()
78 	/* Open context with OP-TEE driver */  in rockchip_read_oem_non_protected_otp()
82 		rc = -ENODEV;  in rockchip_read_oem_non_protected_otp()
95 		rc = -EINVAL;  in rockchip_read_oem_non_protected_otp()
123 	param[1].u.memref.size = shm_size;  in rockchip_read_oem_non_protected_otp()
129 		rc = -EINVAL;  in rockchip_read_oem_non_protected_otp()
136 		rc = -EINVAL;  in rockchip_read_oem_non_protected_otp()
154  * func: write data to non-protected oem zone in secure otp
174 		return -EINVAL;  in rockchip_write_oem_non_protected_otp()
181 	/* Open context with OP-TEE driver */  in rockchip_write_oem_non_protected_otp()
185 		rc = -ENODEV;  in rockchip_write_oem_non_protected_otp()
198 		rc = -EINVAL;  in rockchip_write_oem_non_protected_otp()
215 		rc = -EINVAL;  in rockchip_write_oem_non_protected_otp()
234 	param[1].u.memref.size = shm_size;  in rockchip_write_oem_non_protected_otp()
240 		rc = -EINVAL;  in rockchip_write_oem_non_protected_otp()
259 	struct rockchip_otp *otp = context;  in rockchip_secure_otp_read()  local
260 	int ret = -EINVAL;  in rockchip_secure_otp_read()
262 	if (otp->data && otp->data->reg_read)  in rockchip_secure_otp_read()
263 		ret = otp->data->reg_read(offset, val, bytes);  in rockchip_secure_otp_read()
271 	struct rockchip_otp *otp = context;  in rockchip_secure_otp_write()  local
272 	int ret = -EINVAL;  in rockchip_secure_otp_write()
274 	if (otp->data && otp->data->reg_write)  in rockchip_secure_otp_write()
275 		ret = otp->data->reg_write(offset, val, bytes);  in rockchip_secure_otp_write()
281 	.name = "rockchip-secure-otp",
297 		.compatible = "rockchip,secure-otp",
306 	struct device *dev = &pdev->dev;  in rockchip_secure_otp_probe()
307 	struct rockchip_otp *otp;  in rockchip_secure_otp_probe()  local
316 		return -EINVAL;  in rockchip_secure_otp_probe()
319 	ret = device_property_read_u32(dev, "rockchip,otp-size", &otp_size);  in rockchip_secure_otp_probe()
321 		dev_err(dev, "otp size parameter not specified\n");  in rockchip_secure_otp_probe()
322 		return -EINVAL;  in rockchip_secure_otp_probe()
324 		dev_err(dev, "otp size must be > 0\n");  in rockchip_secure_otp_probe()
325 		return -EINVAL;  in rockchip_secure_otp_probe()
328 	otp = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_otp),  in rockchip_secure_otp_probe()
330 	if (!otp)  in rockchip_secure_otp_probe()
331 		return -ENOMEM;  in rockchip_secure_otp_probe()
333 	otp->data = data;  in rockchip_secure_otp_probe()
334 	otp->dev = dev;  in rockchip_secure_otp_probe()
336 	otp->config = &otp_config;  in rockchip_secure_otp_probe()
337 	otp->config->size = otp_size;  in rockchip_secure_otp_probe()
338 	otp->config->priv = otp;  in rockchip_secure_otp_probe()
339 	otp->config->dev = dev;  in rockchip_secure_otp_probe()
341 	if (data->init) {  in rockchip_secure_otp_probe()
342 		ret = data->init(otp);  in rockchip_secure_otp_probe()
347 	nvmem = devm_nvmem_register(dev, otp->config);  in rockchip_secure_otp_probe()
355 		.name = "rockchip-secure-otp",
366 		pr_err("failed to register secure otp driver\n");  in rockchip_secure_otp_init()
381 MODULE_DESCRIPTION("Rockchip Secure OTP Driver");