1 // SPDX-License-Identifier: GPL-2.0-only
13 #include <linux/nvmem-provider.h>
23 /* Amount of time required to hold charge to blow fuse in micro-seconds */
44  * struct qfprom_soc_data - config that varies from SoC to SoC.
60  * struct qfprom_priv - structure holding qfprom attributes
62  * @qfpraw:       iomapped memory space for qfprom-efuse raw address space.
63  * @qfpconf:      iomapped memory space for qfprom-efuse configuration address
68  * @secclk:       Clock supply.
69  * @vcc:          Regulator supply.
84  * struct qfprom_touched_values - saved values to restore after blowing
97  * struct qfprom_soc_compatible_data - Data matched against the SoC
129  * qfprom_disable_fuse_blowing() - Undo enabling of fuse blowing.
144 	writel(old->timer_val, priv->qfpconf + QFPROM_BLOW_TIMER_OFFSET);  in qfprom_disable_fuse_blowing()
145 	writel(old->accel_val, priv->qfpconf + QFPROM_ACCEL_OFFSET);  in qfprom_disable_fuse_blowing()
147 	dev_pm_genpd_set_performance_state(priv->dev, 0);  in qfprom_disable_fuse_blowing()
148 	pm_runtime_put(priv->dev);  in qfprom_disable_fuse_blowing()
156 	ret = regulator_set_voltage(priv->vcc, 0, INT_MAX);  in qfprom_disable_fuse_blowing()
158 		dev_warn(priv->dev, "Failed to set 0 voltage (ignoring)\n");  in qfprom_disable_fuse_blowing()
160 	ret = regulator_disable(priv->vcc);  in qfprom_disable_fuse_blowing()
162 		dev_warn(priv->dev, "Failed to disable regulator (ignoring)\n");  in qfprom_disable_fuse_blowing()
164 	ret = clk_set_rate(priv->secclk, old->clk_rate);  in qfprom_disable_fuse_blowing()
166 		dev_warn(priv->dev,  in qfprom_disable_fuse_blowing()
169 	clk_disable_unprepare(priv->secclk);  in qfprom_disable_fuse_blowing()
173  * qfprom_enable_fuse_blowing() - Enable fuse blowing.
182  * Return: 0 or -err.
188 	int qfprom_blow_uV = priv->soc_data->qfprom_blow_uV;  in qfprom_enable_fuse_blowing()
190 	ret = clk_prepare_enable(priv->secclk);  in qfprom_enable_fuse_blowing()
192 		dev_err(priv->dev, "Failed to enable clock\n");  in qfprom_enable_fuse_blowing()
196 	old->clk_rate = clk_get_rate(priv->secclk);  in qfprom_enable_fuse_blowing()
197 	ret = clk_set_rate(priv->secclk, priv->soc_data->qfprom_blow_set_freq);  in qfprom_enable_fuse_blowing()
199 		dev_err(priv->dev, "Failed to set clock rate for enable\n");  in qfprom_enable_fuse_blowing()
208 	ret = regulator_set_voltage(priv->vcc, qfprom_blow_uV, INT_MAX);  in qfprom_enable_fuse_blowing()
210 		dev_err(priv->dev, "Failed to set %duV\n", qfprom_blow_uV);  in qfprom_enable_fuse_blowing()
214 	ret = regulator_enable(priv->vcc);  in qfprom_enable_fuse_blowing()
216 		dev_err(priv->dev, "Failed to enable regulator\n");  in qfprom_enable_fuse_blowing()
220 	ret = pm_runtime_resume_and_get(priv->dev);  in qfprom_enable_fuse_blowing()
222 		dev_err(priv->dev, "Failed to enable power-domain\n");  in qfprom_enable_fuse_blowing()
225 	dev_pm_genpd_set_performance_state(priv->dev, INT_MAX);  in qfprom_enable_fuse_blowing()
227 	old->timer_val = readl(priv->qfpconf + QFPROM_BLOW_TIMER_OFFSET);  in qfprom_enable_fuse_blowing()
228 	old->accel_val = readl(priv->qfpconf + QFPROM_ACCEL_OFFSET);  in qfprom_enable_fuse_blowing()
229 	writel(priv->soc_data->qfprom_blow_timer_value,  in qfprom_enable_fuse_blowing()
230 	       priv->qfpconf + QFPROM_BLOW_TIMER_OFFSET);  in qfprom_enable_fuse_blowing()
231 	writel(priv->soc_data->accel_value,  in qfprom_enable_fuse_blowing()
232 	       priv->qfpconf + QFPROM_ACCEL_OFFSET);  in qfprom_enable_fuse_blowing()
237 	regulator_disable(priv->vcc);  in qfprom_enable_fuse_blowing()
239 	clk_set_rate(priv->secclk, old->clk_rate);  in qfprom_enable_fuse_blowing()
241 	clk_disable_unprepare(priv->secclk);  in qfprom_enable_fuse_blowing()
246  * qfprom_reg_write() - Write to fuses.
254  * Return: 0 or -err.
267 	dev_dbg(priv->dev,  in qfprom_reg_write()
274 	 * word_size and stride for reading vs. writing, we'll enforce here.  in qfprom_reg_write()
277 		dev_err(priv->dev,  in qfprom_reg_write()
279 		return -EINVAL;  in qfprom_reg_write()
282 		dev_err(priv->dev,  in qfprom_reg_write()
284 		return -EINVAL;  in qfprom_reg_write()
292 		priv->qfpconf + QFPROM_BLOW_STATUS_OFFSET,  in qfprom_reg_write()
297 		dev_err(priv->dev,  in qfprom_reg_write()
303 		writel(value[i], priv->qfpraw + reg + (i * 4));  in qfprom_reg_write()
306 		priv->qfpconf + QFPROM_BLOW_STATUS_OFFSET,  in qfprom_reg_write()
312 		dev_err(priv->dev, "Timeout waiting for finish.\n");  in qfprom_reg_write()
326 	void __iomem *base = priv->qfpcorrected;  in qfprom_reg_read()
328 	if (read_raw_data && priv->qfpraw)  in qfprom_reg_read()
329 		base = priv->qfpraw;  in qfprom_reg_read()
331 	while (words--)  in qfprom_reg_read()
365 	struct device *dev = &pdev->dev;  in qfprom_probe()
374 		return -ENOMEM;  in qfprom_probe()
378 	priv->qfpcorrected = devm_ioremap_resource(dev, res);  in qfprom_probe()
379 	if (IS_ERR(priv->qfpcorrected))  in qfprom_probe()
380 		return PTR_ERR(priv->qfpcorrected);  in qfprom_probe()
386 	priv->dev = dev;  in qfprom_probe()
389 		econfig.keepout = soc_data->keepout;  in qfprom_probe()
390 		econfig.nkeepout = soc_data->nkeepout;  in qfprom_probe()
402 		priv->qfpraw = devm_ioremap_resource(dev, res);  in qfprom_probe()
403 		if (IS_ERR(priv->qfpraw))  in qfprom_probe()
404 			return PTR_ERR(priv->qfpraw);  in qfprom_probe()
406 		priv->qfpconf = devm_ioremap_resource(dev, res);  in qfprom_probe()
407 		if (IS_ERR(priv->qfpconf))  in qfprom_probe()
408 			return PTR_ERR(priv->qfpconf);  in qfprom_probe()
410 		priv->qfpsecurity = devm_ioremap_resource(dev, res);  in qfprom_probe()
411 		if (IS_ERR(priv->qfpsecurity))  in qfprom_probe()
412 			return PTR_ERR(priv->qfpsecurity);  in qfprom_probe()
414 		version = readl(priv->qfpsecurity + QFPROM_VERSION_OFFSET);  in qfprom_probe()
421 			priv->soc_data = &qfprom_7_8_data;  in qfprom_probe()
423 			priv->soc_data = &qfprom_7_15_data;  in qfprom_probe()
425 		priv->vcc = devm_regulator_get(&pdev->dev, "vcc");  in qfprom_probe()
426 		if (IS_ERR(priv->vcc))  in qfprom_probe()
427 			return PTR_ERR(priv->vcc);  in qfprom_probe()
429 		priv->secclk = devm_clk_get(dev, "core");  in qfprom_probe()
430 		if (IS_ERR(priv->secclk)) {  in qfprom_probe()
431 			ret = PTR_ERR(priv->secclk);  in qfprom_probe()
432 			if (ret != -EPROBE_DEFER)  in qfprom_probe()
438 		if (priv->soc_data)  in qfprom_probe()
454 	{ .compatible = "qcom,sc7180-qfprom", .data = &sc7180_qfprom},
455 	{ .compatible = "qcom,sc7280-qfprom", .data = &sc7280_qfprom},