1 // SPDX-License-Identifier: GPL-2.0+
10 #include <linux/arm-smccc.h>
13 #include <linux/nvmem-provider.h>
75 static bool in_hole(void *context, u32 index)  in in_hole()  argument
78 	const struct ocotp_devtype_data *data = priv->data;  in in_hole()
81 	for (i = 0; i < data->num_region; i++) {  in in_hole()
82 		if (data->region[i].flag & HOLE_REGION) {  in in_hole()
83 			if ((index >= data->region[i].start) &&  in in_hole()
84 			    (index <= data->region[i].end))  in in_hole()
92 static bool in_ecc(void *context, u32 index)  in in_ecc()  argument
95 	const struct ocotp_devtype_data *data = priv->data;  in in_ecc()
98 	for (i = 0; i < data->num_region; i++) {  in in_ecc()
99 		if (data->region[i].flag & ECC_REGION) {  in in_ecc()
100 			if ((index >= data->region[i].start) &&  in in_ecc()
101 			    (index <= data->region[i].end))  in in_ecc()
116 	hdr->ver = IMX_SC_RPC_VERSION;  in imx_sc_misc_otp_fuse_read()
117 	hdr->svc = IMX_SC_RPC_SVC_MISC;  in imx_sc_misc_otp_fuse_read()
118 	hdr->func = IMX_SC_MISC_FUNC_OTP_FUSE_READ;  in imx_sc_misc_otp_fuse_read()
119 	hdr->size = 2;  in imx_sc_misc_otp_fuse_read()
136 	u32 count, index, num_bytes;  in imx_scu_ocotp_read()  local
141 	index = offset;  in imx_scu_ocotp_read()
145 	if (count > (priv->data->nregs - index))  in imx_scu_ocotp_read()
146 		count = priv->data->nregs - index;  in imx_scu_ocotp_read()
150 		return -ENOMEM;  in imx_scu_ocotp_read()
156 	for (i = index; i < (index + count); i++) {  in imx_scu_ocotp_read()
162 		ret = imx_sc_misc_otp_fuse_read(priv->nvmem_ipc, i, buf);  in imx_scu_ocotp_read()
187 	u32 index;  in imx_scu_ocotp_write()  local
192 		return -EINVAL;  in imx_scu_ocotp_write()
194 	index = offset;  in imx_scu_ocotp_write()
196 	if (in_hole(context, index))  in imx_scu_ocotp_write()
197 		return -EINVAL;  in imx_scu_ocotp_write()
199 	if (in_ecc(context, index)) {  in imx_scu_ocotp_write()
202 		ret = imx_sc_misc_otp_fuse_read(priv->nvmem_ipc, index, &tmp);  in imx_scu_ocotp_write()
208 			return -EIO;  in imx_scu_ocotp_write()
214 	arm_smccc_smc(IMX_SIP_OTP_WRITE, index, *buf, 0, 0, 0, 0, 0, &res);  in imx_scu_ocotp_write()
222 	.name = "imx-scu-ocotp",
233 	{ .compatible = "fsl,imx8qxp-scu-ocotp", (void *)&imx8qxp_data },
234 	{ .compatible = "fsl,imx8qm-scu-ocotp", (void *)&imx8qm_data },
241 	struct device *dev = &pdev->dev;  in imx_scu_ocotp_probe()
248 		return -ENOMEM;  in imx_scu_ocotp_probe()
250 	ret = imx_scu_get_handle(&priv->nvmem_ipc);  in imx_scu_ocotp_probe()
254 	priv->data = of_device_get_match_data(dev);  in imx_scu_ocotp_probe()
255 	priv->dev = dev;  in imx_scu_ocotp_probe()
256 	imx_scu_ocotp_nvmem_config.size = 4 * priv->data->nregs;  in imx_scu_ocotp_probe()
274 MODULE_DESCRIPTION("i.MX8 SCU OCOTP fuse box driver");