3  * Rockchip OTP Driver
22 /* OTP Register Offsets */
35 /* OTP Register bits and masks */
85 static int rockchip_otp_reset(struct rockchip_otp *otp)  in rockchip_otp_reset()  argument
89 	ret = reset_control_assert(otp->rst);  in rockchip_otp_reset()
91 		dev_err(otp->dev, "failed to assert otp phy %d\n", ret);  in rockchip_otp_reset()
97 	ret = reset_control_deassert(otp->rst);  in rockchip_otp_reset()
99 		dev_err(otp->dev, "failed to deassert otp phy %d\n", ret);  in rockchip_otp_reset()
106 static int rockchip_otp_wait_status(struct rockchip_otp *otp,  in rockchip_otp_wait_status()  argument
112 	ret = readl_poll_timeout_atomic(otp->base + reg, status,  in rockchip_otp_wait_status()
118 	writel(flag, otp->base + reg);  in rockchip_otp_wait_status()
123 static int rockchip_otp_ecc_enable(struct rockchip_otp *otp, bool enable)  in rockchip_otp_ecc_enable()  argument
128 	       otp->base + OTPC_SBPI_CTRL);  in rockchip_otp_ecc_enable()
130 	writel(SBPI_CMD_VALID_MASK | 0x1, otp->base + OTPC_SBPI_CMD_VALID_PRE);  in rockchip_otp_ecc_enable()
132 	       otp->base + OTPC_SBPI_CMD0_OFFSET);  in rockchip_otp_ecc_enable()
134 		writel(SBPI_ECC_ENABLE, otp->base + OTPC_SBPI_CMD1_OFFSET);  in rockchip_otp_ecc_enable()
136 		writel(SBPI_ECC_DISABLE, otp->base + OTPC_SBPI_CMD1_OFFSET);  in rockchip_otp_ecc_enable()
138 	writel(SBPI_ENABLE_MASK | SBPI_ENABLE, otp->base + OTPC_SBPI_CTRL);  in rockchip_otp_ecc_enable()
140 	ret = rockchip_otp_wait_status(otp, OTPC_INT_STATUS, OTPC_SBPI_DONE);  in rockchip_otp_ecc_enable()
142 		dev_err(otp->dev, "timeout during ecc_enable\n");  in rockchip_otp_ecc_enable()
150 	struct rockchip_otp *otp = context;  in px30_otp_read()  local
154 	ret = rockchip_otp_reset(otp);  in px30_otp_read()
156 		dev_err(otp->dev, "failed to reset otp phy\n");  in px30_otp_read()
160 	ret = rockchip_otp_ecc_enable(otp, false);  in px30_otp_read()
162 		dev_err(otp->dev, "rockchip_otp_ecc_enable err\n");  in px30_otp_read()
166 	writel(OTPC_USE_USER | OTPC_USE_USER_MASK, otp->base + OTPC_USER_CTRL);  in px30_otp_read()
170 		       otp->base + OTPC_USER_ADDR);  in px30_otp_read()
172 		       otp->base + OTPC_USER_ENABLE);  in px30_otp_read()
173 		ret = rockchip_otp_wait_status(otp, OTPC_INT_STATUS, OTPC_USER_DONE);  in px30_otp_read()
175 			dev_err(otp->dev, "timeout during read setup\n");  in px30_otp_read()
178 		*buf++ = readb(otp->base + OTPC_USER_Q);  in px30_otp_read()
182 	writel(0x0 | OTPC_USE_USER_MASK, otp->base + OTPC_USER_CTRL);  in px30_otp_read()
190 	struct rockchip_otp *otp = context;  in rk3588_otp_read()  local
208 		       otp->base + RK3588_OTPC_AUTO_CTRL);  in rk3588_otp_read()
209 		writel(RK3588_AUTO_EN, otp->base + RK3588_OTPC_AUTO_EN);  in rk3588_otp_read()
211 		ret = rockchip_otp_wait_status(otp, RK3588_OTPC_INT_ST,  in rk3588_otp_read()
214 			dev_err(otp->dev, "timeout during read setup\n");  in rk3588_otp_read()
218 		data = readl(otp->base + RK3588_OTPC_DOUT0);  in rk3588_otp_read()
236 	struct rockchip_otp *otp = context;  in rockchip_otp_read()  local
239 	if (!otp->data || !otp->data->reg_read)  in rockchip_otp_read()
242 	ret = clk_bulk_prepare_enable(otp->data->num_clks, otp->clks);  in rockchip_otp_read()
244 		dev_err(otp->dev, "failed to prepare/enable clks\n");  in rockchip_otp_read()
248 	ret = otp->data->reg_read(context, offset, val, bytes);  in rockchip_otp_read()
250 	clk_bulk_disable_unprepare(otp->data->num_clks, otp->clks);  in rockchip_otp_read()
256 	.name = "rockchip-otp",
267 	"otp", "apb_pclk", "phy",
278 	"otp", "apb_pclk", "phy", "arb",
290 		.compatible = "rockchip,px30-otp",
294 		.compatible = "rockchip,rk3308-otp",
298 		.compatible = "rockchip,rk3588-otp",
308 	struct rockchip_otp *otp;  in rockchip_otp_probe()  local
317 	otp = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_otp),  in rockchip_otp_probe()
319 	if (!otp)  in rockchip_otp_probe()
322 	otp->data = data;  in rockchip_otp_probe()
323 	otp->dev = dev;  in rockchip_otp_probe()
324 	otp->base = devm_platform_ioremap_resource(pdev, 0);  in rockchip_otp_probe()
325 	if (IS_ERR(otp->base))  in rockchip_otp_probe()
326 		return dev_err_probe(dev, PTR_ERR(otp->base),  in rockchip_otp_probe()
329 	otp->clks = devm_kcalloc(dev, data->num_clks, sizeof(*otp->clks),  in rockchip_otp_probe()
331 	if (!otp->clks)  in rockchip_otp_probe()
335 		otp->clks[i].id = data->clks[i];  in rockchip_otp_probe()
337 	ret = devm_clk_bulk_get(dev, data->num_clks, otp->clks);  in rockchip_otp_probe()
341 	otp->rst = devm_reset_control_array_get_exclusive(dev);  in rockchip_otp_probe()
342 	if (IS_ERR(otp->rst))  in rockchip_otp_probe()
343 		return dev_err_probe(dev, PTR_ERR(otp->rst),  in rockchip_otp_probe()
347 	otp_config.priv = otp;  in rockchip_otp_probe()
360 		.name = "rockchip-otp",
366 MODULE_DESCRIPTION("Rockchip OTP driver");