2  * eFuse driver for Rockchip devices
5  * Written by Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
7  * SPDX-License-Identifier:	GPL-2.0+
15 #include <linux/arm-smccc.h>
89 typedef int (*EFUSE_READ)(struct udevice *dev, int offset, void *buf, int size);
92 	u32 ctrl;      /* 0x00  efuse control register */
93 	u32 dout;      /* 0x04  efuse data out register */
94 	u32 rf;        /* 0x08  efuse redundancy bit used register */
98 		       /* 0x14	efuse strobe finish control register */
120 	/* setup efuse timing */  in rk1808_efuse_timing_init()
136 				      void *buf, int size)  in rockchip_rk1808_efuse_read()  argument
139 	struct rockchip_efuse_regs *efuse =  in rockchip_rk1808_efuse_read()  local
140 		(struct rockchip_efuse_regs *)plat->base;  in rockchip_rk1808_efuse_read()
146 	rk1808_efuse_timing_init(plat->base);  in rockchip_rk1808_efuse_read()
149 	addr_end = roundup(offset + size, RK1808_NBYTES) / RK1808_NBYTES;  in rockchip_rk1808_efuse_read()
151 	addr_len = addr_end - addr_start;  in rockchip_rk1808_efuse_read()
155 		return -ENOMEM;  in rockchip_rk1808_efuse_read()
157 	while (addr_len--) {  in rockchip_rk1808_efuse_read()
160 		       &efuse->auto_ctrl);  in rockchip_rk1808_efuse_read()
162 		status = readl(&efuse->int_status);  in rockchip_rk1808_efuse_read()
164 			ret = -EIO;  in rockchip_rk1808_efuse_read()
167 		out_value = readl(&efuse->dout2);  in rockchip_rk1808_efuse_read()
168 		writel(RK1808_INT_FINISH, &efuse->int_status);  in rockchip_rk1808_efuse_read()
173 	memcpy(buf, buffer + addr_offset, size);  in rockchip_rk1808_efuse_read()
182 				      void *buf, int size)  in rockchip_rk3368_efuse_read()  argument
185 	struct rockchip_efuse_regs *efuse =  in rockchip_rk3368_efuse_read()  local
186 		(struct rockchip_efuse_regs *)plat->base;  in rockchip_rk3368_efuse_read()
191 	sip_smc_secure_reg_write((ulong)&efuse->ctrl,  in rockchip_rk3368_efuse_read()
194 	while (size--) {  in rockchip_rk3368_efuse_read()
195 		res = sip_smc_secure_reg_read((ulong)&efuse->ctrl);  in rockchip_rk3368_efuse_read()
196 		sip_smc_secure_reg_write((ulong)&efuse->ctrl, res.a1 &  in rockchip_rk3368_efuse_read()
199 		res = sip_smc_secure_reg_read((ulong)&efuse->ctrl);  in rockchip_rk3368_efuse_read()
200 		sip_smc_secure_reg_write((ulong)&efuse->ctrl, res.a1 |  in rockchip_rk3368_efuse_read()
205 		res = sip_smc_secure_reg_read((ulong)&efuse->ctrl);  in rockchip_rk3368_efuse_read()
206 		sip_smc_secure_reg_write((ulong)&efuse->ctrl,  in rockchip_rk3368_efuse_read()
210 		res = sip_smc_secure_reg_read((ulong)&efuse->dout);  in rockchip_rk3368_efuse_read()
213 		res = sip_smc_secure_reg_read((ulong)&efuse->ctrl);  in rockchip_rk3368_efuse_read()
214 		sip_smc_secure_reg_write((ulong)&efuse->ctrl,  in rockchip_rk3368_efuse_read()
220 	sip_smc_secure_reg_write((ulong)&efuse->ctrl,  in rockchip_rk3368_efuse_read()
228 				      void *buf, int size)  in rockchip_rk3399_efuse_read()  argument
231 	struct rockchip_efuse_regs *efuse =  in rockchip_rk3399_efuse_read()  local
232 		(struct rockchip_efuse_regs *)plat->base;  in rockchip_rk3399_efuse_read()
242 	addr_end = DIV_ROUND_UP(offset + size, RK3399_BYTES_PER_FUSE);  in rockchip_rk3399_efuse_read()
244 	/* cap to the size of the efuse block */  in rockchip_rk3399_efuse_read()
249 	       &efuse->ctrl);  in rockchip_rk3399_efuse_read()
252 		setbits_le32(&efuse->ctrl,  in rockchip_rk3399_efuse_read()
255 		out_value = readl(&efuse->dout);  in rockchip_rk3399_efuse_read()
256 		clrbits_le32(&efuse->ctrl, RK3399_STROBE);  in rockchip_rk3399_efuse_read()
264 	writel(RK3399_PD | RK3399_CSB, &efuse->ctrl);  in rockchip_rk3399_efuse_read()
266 	memcpy(buf, bytes + addr_offset, size);  in rockchip_rk3399_efuse_read()
272 				      void *buf, int size)  in rockchip_rk3288_efuse_read()  argument
275 	struct rockchip_efuse_regs *efuse =  in rockchip_rk3288_efuse_read()  local
276 		(struct rockchip_efuse_regs *)plat->base;  in rockchip_rk3288_efuse_read()
280 	if (size > (max_size - offset))  in rockchip_rk3288_efuse_read()
281 		size = max_size - offset;  in rockchip_rk3288_efuse_read()
284 	writel(RK3288_LOAD | RK3288_PGENB, &efuse->ctrl);  in rockchip_rk3288_efuse_read()
287 	while (size--) {  in rockchip_rk3288_efuse_read()
288 		writel(readl(&efuse->ctrl) &  in rockchip_rk3288_efuse_read()
290 				&efuse->ctrl);  in rockchip_rk3288_efuse_read()
292 		writel(readl(&efuse->ctrl) |  in rockchip_rk3288_efuse_read()
294 				&efuse->ctrl);  in rockchip_rk3288_efuse_read()
297 		writel(readl(&efuse->ctrl) |  in rockchip_rk3288_efuse_read()
298 				RK3288_STROBE, &efuse->ctrl);  in rockchip_rk3288_efuse_read()
301 		*buffer++ = readl(&efuse->dout);  in rockchip_rk3288_efuse_read()
303 		writel(readl(&efuse->ctrl) &  in rockchip_rk3288_efuse_read()
304 				(~RK3288_STROBE), &efuse->ctrl);  in rockchip_rk3288_efuse_read()
309 	writel(RK3288_PGENB | RK3288_CSB, &efuse->ctrl);  in rockchip_rk3288_efuse_read()
316 					     void *buf, int size)  in rockchip_rk3288_efuse_secure_read()  argument
319 	struct rockchip_efuse_regs *efuse =  in rockchip_rk3288_efuse_secure_read()  local
320 		(struct rockchip_efuse_regs *)plat->base;  in rockchip_rk3288_efuse_secure_read()
325 	if (size > (max_size - offset))  in rockchip_rk3288_efuse_secure_read()
326 		size = max_size - offset;  in rockchip_rk3288_efuse_secure_read()
329 	sip_smc_secure_reg_write((ulong)&efuse->ctrl,  in rockchip_rk3288_efuse_secure_read()
332 	while (size--) {  in rockchip_rk3288_efuse_secure_read()
333 		res = sip_smc_secure_reg_read((ulong)&efuse->ctrl);  in rockchip_rk3288_efuse_secure_read()
334 		sip_smc_secure_reg_write((ulong)&efuse->ctrl, res.a1 &  in rockchip_rk3288_efuse_secure_read()
337 		res = sip_smc_secure_reg_read((ulong)&efuse->ctrl);  in rockchip_rk3288_efuse_secure_read()
338 		sip_smc_secure_reg_write((ulong)&efuse->ctrl, res.a1 |  in rockchip_rk3288_efuse_secure_read()
343 		res = sip_smc_secure_reg_read((ulong)&efuse->ctrl);  in rockchip_rk3288_efuse_secure_read()
344 		sip_smc_secure_reg_write((ulong)&efuse->ctrl,  in rockchip_rk3288_efuse_secure_read()
348 		res = sip_smc_secure_reg_read((ulong)&efuse->dout);  in rockchip_rk3288_efuse_secure_read()
351 		res = sip_smc_secure_reg_read((ulong)&efuse->ctrl);  in rockchip_rk3288_efuse_secure_read()
352 		sip_smc_secure_reg_write((ulong)&efuse->ctrl,  in rockchip_rk3288_efuse_secure_read()
358 	sip_smc_secure_reg_write((ulong)&efuse->ctrl,  in rockchip_rk3288_efuse_secure_read()
366 				      void *buf, int size)  in rockchip_rk3328_efuse_read()  argument
369 	struct rockchip_efuse_regs *efuse =  in rockchip_rk3328_efuse_read()  local
370 		(struct rockchip_efuse_regs *)plat->base;  in rockchip_rk3328_efuse_read()
376 	/* Max non-secure Byte */  in rockchip_rk3328_efuse_read()
377 	if (size > 32)  in rockchip_rk3328_efuse_read()
378 		size = 32;  in rockchip_rk3328_efuse_read()
380 	/* 128 Byte efuse, 96 Byte for secure, 32 Byte for non-secure */  in rockchip_rk3328_efuse_read()
384 	addr_end = roundup(offset + size, RK3399_BYTES_PER_FUSE) /  in rockchip_rk3328_efuse_read()
387 	addr_len = addr_end - addr_start;  in rockchip_rk3328_efuse_read()
391 		return -ENOMEM;  in rockchip_rk3328_efuse_read()
396 		         &efuse->auto_ctrl);  in rockchip_rk3328_efuse_read()
398 		status = readl(&efuse->int_status);  in rockchip_rk3328_efuse_read()
400 			ret = -EIO;  in rockchip_rk3328_efuse_read()
403 		out_value = readl(&efuse->dout2);  in rockchip_rk3328_efuse_read()
404 		writel(RK3328_INT_FINISH, &efuse->int_status);  in rockchip_rk3328_efuse_read()
409 	memcpy(buf, buffer + addr_offset, size);  in rockchip_rk3328_efuse_read()
417 			       void *buf, int size)  in rockchip_efuse_read()  argument
423 		return -ENOSYS;  in rockchip_efuse_read()
425 	return (*efuse_read)(dev, offset, buf, size);  in rockchip_efuse_read()
430 	*buf = device_is_compatible(dev, "rockchip,rk3288-secure-efuse") ?  in rockchip_efuse_capatiblity()
439 	int ret = -EINVAL;  in rockchip_efuse_ioctl()
459 	plat->base = dev_read_addr_ptr(dev);  in rockchip_efuse_ofdata_to_platdata()
465 		.compatible = "rockchip,rk1808-efuse",
470 		.compatible = "rockchip,rk3288-secure-efuse",
475 		.compatible = "rockchip,rk3066a-efuse",
479 		.compatible = "rockchip,rk3188-efuse",
483 		.compatible = "rockchip,rk322x-efuse",
487 		.compatible = "rockchip,rk3328-efuse",
492 		.compatible = "rockchip,rk3368-efuse",
497 		.compatible = "rockchip,rk3399-efuse",