74 static inline void imx_rngc_irq_mask_clear(struct imx_rngc *rngc)  in imx_rngc_irq_mask_clear()  argument
79 	ctrl = readl(rngc->base + RNGC_CONTROL);  in imx_rngc_irq_mask_clear()
81 	writel(ctrl, rngc->base + RNGC_CONTROL);  in imx_rngc_irq_mask_clear()
88 	cmd = readl(rngc->base + RNGC_COMMAND);  in imx_rngc_irq_mask_clear()
90 	writel(cmd, rngc->base + RNGC_COMMAND);  in imx_rngc_irq_mask_clear()
93 static inline void imx_rngc_irq_unmask(struct imx_rngc *rngc)  in imx_rngc_irq_unmask()  argument
97 	ctrl = readl(rngc->base + RNGC_CONTROL);  in imx_rngc_irq_unmask()
99 	writel(ctrl, rngc->base + RNGC_CONTROL);  in imx_rngc_irq_unmask()
102 static int imx_rngc_self_test(struct imx_rngc *rngc)  in imx_rngc_self_test()  argument
107 	imx_rngc_irq_unmask(rngc);  in imx_rngc_self_test()
110 	cmd = readl(rngc->base + RNGC_COMMAND);  in imx_rngc_self_test()
111 	writel(cmd | RNGC_CMD_SELF_TEST, rngc->base + RNGC_COMMAND);  in imx_rngc_self_test()
113 	ret = wait_for_completion_timeout(&rngc->rng_op_done, msecs_to_jiffies(RNGC_TIMEOUT));  in imx_rngc_self_test()
114 	imx_rngc_irq_mask_clear(rngc);  in imx_rngc_self_test()
118 	return rngc->err_reg ? -EIO : 0;  in imx_rngc_self_test()
123 	struct imx_rngc *rngc = container_of(rng, struct imx_rngc, rng);  in imx_rngc_read()  local
128 		status = readl(rngc->base + RNGC_STATUS);  in imx_rngc_read()
136 			*(u32 *)data = readl(rngc->base + RNGC_FIFO);  in imx_rngc_read()
149 	struct imx_rngc *rngc = (struct imx_rngc *)priv;  in imx_rngc_irq()  local
156 	status = readl(rngc->base + RNGC_STATUS);  in imx_rngc_irq()
157 	rngc->err_reg = readl(rngc->base + RNGC_ERROR);  in imx_rngc_irq()
159 	imx_rngc_irq_mask_clear(rngc);  in imx_rngc_irq()
162 		complete(&rngc->rng_op_done);  in imx_rngc_irq()
169 	struct imx_rngc *rngc = container_of(rng, struct imx_rngc, rng);  in imx_rngc_init()  local
174 	cmd = readl(rngc->base + RNGC_COMMAND);  in imx_rngc_init()
175 	writel(cmd | RNGC_CMD_CLR_ERR, rngc->base + RNGC_COMMAND);  in imx_rngc_init()
177 	imx_rngc_irq_unmask(rngc);  in imx_rngc_init()
182 		cmd = readl(rngc->base + RNGC_COMMAND);  in imx_rngc_init()
183 		writel(cmd | RNGC_CMD_SEED, rngc->base + RNGC_COMMAND);  in imx_rngc_init()
185 		ret = wait_for_completion_timeout(&rngc->rng_op_done, msecs_to_jiffies(RNGC_TIMEOUT));  in imx_rngc_init()
191 	} while (rngc->err_reg == RNGC_ERROR_STATUS_STAT_ERR);  in imx_rngc_init()
193 	if (rngc->err_reg) {  in imx_rngc_init()
202 	ctrl = readl(rngc->base + RNGC_CONTROL);  in imx_rngc_init()
204 	writel(ctrl, rngc->base + RNGC_CONTROL);  in imx_rngc_init()
214 	imx_rngc_irq_mask_clear(rngc);  in imx_rngc_init()
220 	struct imx_rngc *rngc = container_of(rng, struct imx_rngc, rng);  in imx_rngc_cleanup()  local
222 	imx_rngc_irq_mask_clear(rngc);  in imx_rngc_cleanup()
227 	struct imx_rngc *rngc;  in imx_rngc_probe()  local
233 	rngc = devm_kzalloc(&pdev->dev, sizeof(*rngc), GFP_KERNEL);  in imx_rngc_probe()
234 	if (!rngc)  in imx_rngc_probe()
237 	rngc->base = devm_platform_ioremap_resource(pdev, 0);  in imx_rngc_probe()
238 	if (IS_ERR(rngc->base))  in imx_rngc_probe()
239 		return PTR_ERR(rngc->base);  in imx_rngc_probe()
241 	rngc->clk = devm_clk_get_enabled(&pdev->dev, NULL);  in imx_rngc_probe()
242 	if (IS_ERR(rngc->clk))  in imx_rngc_probe()
243 		return dev_err_probe(&pdev->dev, PTR_ERR(rngc->clk), "Cannot get rng_clk\n");  in imx_rngc_probe()
249 	ver_id = readl(rngc->base + RNGC_VER_ID);  in imx_rngc_probe()
258 	init_completion(&rngc->rng_op_done);  in imx_rngc_probe()
260 	rngc->rng.name = pdev->name;  in imx_rngc_probe()
261 	rngc->rng.init = imx_rngc_init;  in imx_rngc_probe()
262 	rngc->rng.read = imx_rngc_read;  in imx_rngc_probe()
263 	rngc->rng.cleanup = imx_rngc_cleanup;  in imx_rngc_probe()
264 	rngc->rng.quality = 19;  in imx_rngc_probe()
266 	rngc->dev = &pdev->dev;  in imx_rngc_probe()
267 	platform_set_drvdata(pdev, rngc);  in imx_rngc_probe()
269 	imx_rngc_irq_mask_clear(rngc);  in imx_rngc_probe()
272 			irq, imx_rngc_irq, 0, pdev->name, (void *)rngc);  in imx_rngc_probe()
277 		ret = imx_rngc_self_test(rngc);  in imx_rngc_probe()
282 	ret = devm_hwrng_register(&pdev->dev, &rngc->rng);  in imx_rngc_probe()
295 	struct imx_rngc *rngc = dev_get_drvdata(dev);  in imx_rngc_suspend()  local
297 	clk_disable_unprepare(rngc->clk);  in imx_rngc_suspend()
304 	struct imx_rngc *rngc = dev_get_drvdata(dev);  in imx_rngc_resume()  local
306 	clk_prepare_enable(rngc->clk);  in imx_rngc_resume()