19 #include <linux/nvmem-provider.h>
25  * # of tries for OTP Status. The time to execute a command varies. The slowest
31 /* Sequence to enable OTP program */
56 #define OTPC_CMD_MASK  (BIT(OTPC_COMMAND_COMMAND_WIDTH) - 1)
57 #define OTPC_ADDR_MASK (BIT(OTPC_CPUADDR_REG_OTPC_CPU_ADDRESS_WIDTH) - 1)
125 		return -EAGAIN;  in poll_cpu_status()
168 	u32 address = offset / priv->config->word_size;  in bcm_otpc_read()
172 		set_command(priv->base, OTPC_CMD_READ);  in bcm_otpc_read()
173 		set_cpu_address(priv->base, address++);  in bcm_otpc_read()
174 		set_start_bit(priv->base);  in bcm_otpc_read()
175 		ret = poll_cpu_status(priv->base, OTPC_STAT_CMD_DONE);  in bcm_otpc_read()
177 			dev_err(priv->dev, "otp read error: 0x%x", ret);  in bcm_otpc_read()
178 			return -EIO;  in bcm_otpc_read()
181 		for (i = 0; i < priv->map->otpc_row_size; i++) {  in bcm_otpc_read()
182 			*buf++ = readl(priv->base +  in bcm_otpc_read()
183 					priv->map->data_r_offset[i]);  in bcm_otpc_read()
187 		reset_start_bit(priv->base);  in bcm_otpc_read()
199 	u32 address = offset / priv->config->word_size;  in bcm_otpc_write()
202 	if (offset % priv->config->word_size)  in bcm_otpc_write()
203 		return -EINVAL;  in bcm_otpc_write()
205 	ret = enable_ocotp_program(priv->base);  in bcm_otpc_write()
207 		return -EIO;  in bcm_otpc_write()
210 		set_command(priv->base, OTPC_CMD_PROGRAM);  in bcm_otpc_write()
211 		set_cpu_address(priv->base, address++);  in bcm_otpc_write()
212 		for (i = 0; i < priv->map->otpc_row_size; i++) {  in bcm_otpc_write()
213 			writel(*buf, priv->base + priv->map->data_w_offset[i]);  in bcm_otpc_write()
217 		set_start_bit(priv->base);  in bcm_otpc_write()
218 		ret = poll_cpu_status(priv->base, OTPC_STAT_CMD_DONE);  in bcm_otpc_write()
219 		reset_start_bit(priv->base);  in bcm_otpc_write()
221 			dev_err(priv->dev, "otp write error: 0x%x", ret);  in bcm_otpc_write()
222 			return -EIO;  in bcm_otpc_write()
226 	disable_ocotp_program(priv->base);  in bcm_otpc_write()
232 	.name = "bcm-ocotp",
242 	{ .compatible = "brcm,ocotp-v2", .data = &otp_map_v2 },
256 	struct device *dev = &pdev->dev;  in bcm_otpc_probe()
265 		return -ENOMEM;  in bcm_otpc_probe()
267 	priv->map = device_get_match_data(dev);  in bcm_otpc_probe()
268 	if (!priv->map)  in bcm_otpc_probe()
269 		return -ENODEV;  in bcm_otpc_probe()
271 	/* Get OTP base address register. */  in bcm_otpc_probe()
273 	priv->base = devm_ioremap_resource(dev, res);  in bcm_otpc_probe()
274 	if (IS_ERR(priv->base)) {  in bcm_otpc_probe()
276 		return PTR_ERR(priv->base);  in bcm_otpc_probe()
280 	writel(readl(priv->base + OTPC_MODE_REG_OFFSET) |  in bcm_otpc_probe()
282 		priv->base + OTPC_MODE_REG_OFFSET);  in bcm_otpc_probe()
283 	reset_start_bit(priv->base);  in bcm_otpc_probe()
285 	/* Read size of memory in words. */  in bcm_otpc_probe()
286 	err = device_property_read_u32(dev, "brcm,ocotp-size", &num_words);  in bcm_otpc_probe()
288 		dev_err(dev, "size parameter not specified\n");  in bcm_otpc_probe()
289 		return -EINVAL;  in bcm_otpc_probe()
291 		dev_err(dev, "size must be > 0\n");  in bcm_otpc_probe()
292 		return -EINVAL;  in bcm_otpc_probe()
295 	bcm_otpc_nvmem_config.size = 4 * num_words;  in bcm_otpc_probe()
299 	if (priv->map == &otp_map_v2) {  in bcm_otpc_probe()
304 	priv->config = &bcm_otpc_nvmem_config;  in bcm_otpc_probe()
318 		.name	= "brcm-otpc",