1 // SPDX-License-Identifier: GPL-2.0+
3  * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
16 /* BSEC REGISTER OFFSET (base relative) */
24 #define BSEC_SPLOCK_OFF			0x064 /* Program safmem sticky lock */
25 #define BSEC_SWLOCK_OFF			0x07C /* write in OTP sticky lock */
26 #define BSEC_SRLOCK_OFF			0x094 /* shadowing sticky lock */
36 /* LOCK Register */
47  * OTP Lock services definition
53  * bsec_check_error() - Check status of one otp
55  * @otp: otp number (0 - BSEC_OTP_MAX_VALUE)
56  * Return: 0 if no error, -EAGAIN or -ENOTSUPP
67 		return -EAGAIN;  in bsec_check_error()
69 		return -ENOTSUPP;  in bsec_check_error()
75  * bsec_lock() - manage lock for each type SR/SP/SW
77  * @otp: otp number (0 - BSEC_OTP_MAX_VALUE)
92  * bsec_read_SR_lock() - read SR lock (Shadowing)
94  * @otp: otp number (0 - BSEC_OTP_MAX_VALUE)
103  * bsec_read_SP_lock() - read SP lock (program Lock)
105  * @otp: otp number (0 - BSEC_OTP_MAX_VALUE)
114  * bsec_SW_lock() - manage SW lock (Write in Shadow)
116  * @otp: otp number (0 - BSEC_OTP_MAX_VALUE)
125  * bsec_power_safmem() - Activate or deactivate safmem power
150  * bsec_shadow_register() - copy safmen otp to bsec data
152  * @otp: otp number (0 - BSEC_OTP_MAX_VALUE)
192  * bsec_read_shadow() - read an otp data value from shadow
195  * @otp: otp number (0 - BSEC_OTP_MAX_VALUE)
206  * bsec_write_shadow() - write value in BSEC data register in shadow
209  * @otp: otp number (0 - BSEC_OTP_MAX_VALUE)
216 		pr_debug("bsec : OTP %d is lock, write will be ignore\n", otp);  in bsec_write_shadow()
224  * bsec_program_otp() - program a bit in SAFMEM
227  * @otp: otp number (0 - BSEC_OTP_MAX_VALUE)
240 		pr_debug("bsec : Global lock, prog will be ignore\n");  in bsec_program_otp()
264 		ret = -EACCES;  in bsec_program_otp()
286 	ret = bsec_read_shadow(plat->base, &tmp_data, otp);  in stm32mp_bsec_read_otp()
291 	ret = bsec_shadow_register(plat->base, otp);  in stm32mp_bsec_read_otp()
295 	ret = bsec_read_shadow(plat->base, val, otp);  in stm32mp_bsec_read_otp()
300 	ret = bsec_write_shadow(plat->base, tmp_data, otp);  in stm32mp_bsec_read_otp()
308 	return bsec_read_shadow(plat->base, val, otp);  in stm32mp_bsec_read_shadow()
315 	return bsec_program_otp(plat->base, val, otp);  in stm32mp_bsec_write_otp()
322 	return bsec_write_shadow(plat->base, val, otp);  in stm32mp_bsec_write_shadow()
325 static int stm32mp_bsec_read(struct udevice *dev, int offset,  in stm32mp_bsec_read()  argument
334 	if (offset >= STM32_BSEC_OTP_OFFSET) {  in stm32mp_bsec_read()
335 		offset -= STM32_BSEC_OTP_OFFSET;  in stm32mp_bsec_read()
338 	otp = offset / sizeof(u32);  in stm32mp_bsec_read()
340 	if (otp < 0 || (otp + nb_otp - 1) > BSEC_OTP_MAX_VALUE) {  in stm32mp_bsec_read()
343 		return -EINVAL;  in stm32mp_bsec_read()
347 		u32 *addr = &((u32 *)buf)[i - otp];  in stm32mp_bsec_read()
360 static int stm32mp_bsec_write(struct udevice *dev, int offset,  in stm32mp_bsec_write()  argument
369 	if (offset >= STM32_BSEC_OTP_OFFSET) {  in stm32mp_bsec_write()
370 		offset -= STM32_BSEC_OTP_OFFSET;  in stm32mp_bsec_write()
373 	otp = offset / sizeof(u32);  in stm32mp_bsec_write()
375 	if (otp < 0 || (otp + nb_otp - 1) > BSEC_OTP_MAX_VALUE) {  in stm32mp_bsec_write()
378 		return -EINVAL;  in stm32mp_bsec_write()
382 		u32 *val = &((u32 *)buf)[i - otp];  in stm32mp_bsec_write()
403 	plat->base = (u32)dev_read_addr_ptr(dev);  in stm32mp_bsec_ofdata_to_platdata()
409 	{ .compatible = "st,stm32mp-bsec" },