3  * Driver for Amlogic A1 SPI flash controller (SPIFC)
113 static int amlogic_spifc_a1_request(struct amlogic_spifc_a1 *spifc, bool read)  in amlogic_spifc_a1_request()  argument
120 	       spifc->base + SPIFC_A1_USER_CTRL0_REG);  in amlogic_spifc_a1_request()
122 	return readl_poll_timeout(spifc->base + SPIFC_A1_USER_CTRL0_REG,  in amlogic_spifc_a1_request()
127 static void amlogic_spifc_a1_drain_buffer(struct amlogic_spifc_a1 *spifc,  in amlogic_spifc_a1_drain_buffer()  argument
135 	       spifc->base + SPIFC_A1_DBUF_CTRL_REG);  in amlogic_spifc_a1_drain_buffer()
136 	ioread32_rep(spifc->base + SPIFC_A1_DBUF_DATA_REG, buf, count);  in amlogic_spifc_a1_drain_buffer()
139 		data = readl(spifc->base + SPIFC_A1_DBUF_DATA_REG);  in amlogic_spifc_a1_drain_buffer()
144 static void amlogic_spifc_a1_fill_buffer(struct amlogic_spifc_a1 *spifc,  in amlogic_spifc_a1_fill_buffer()  argument
152 	       spifc->base + SPIFC_A1_DBUF_CTRL_REG);  in amlogic_spifc_a1_fill_buffer()
153 	iowrite32_rep(spifc->base + SPIFC_A1_DBUF_DATA_REG, buf, count);  in amlogic_spifc_a1_fill_buffer()
157 		writel(data, spifc->base + SPIFC_A1_DBUF_DATA_REG);  in amlogic_spifc_a1_fill_buffer()
161 static void amlogic_spifc_a1_user_init(struct amlogic_spifc_a1 *spifc)  in amlogic_spifc_a1_user_init()  argument
163 	writel(0, spifc->base + SPIFC_A1_USER_CTRL0_REG);  in amlogic_spifc_a1_user_init()
164 	writel(0, spifc->base + SPIFC_A1_USER_CTRL1_REG);  in amlogic_spifc_a1_user_init()
165 	writel(0, spifc->base + SPIFC_A1_USER_CTRL2_REG);  in amlogic_spifc_a1_user_init()
166 	writel(0, spifc->base + SPIFC_A1_USER_CTRL3_REG);  in amlogic_spifc_a1_user_init()
169 static void amlogic_spifc_a1_set_cmd(struct amlogic_spifc_a1 *spifc,  in amlogic_spifc_a1_set_cmd()  argument
174 	val = readl(spifc->base + SPIFC_A1_USER_CTRL1_REG);  in amlogic_spifc_a1_set_cmd()
177 	writel(val, spifc->base + SPIFC_A1_USER_CTRL1_REG);  in amlogic_spifc_a1_set_cmd()
180 static void amlogic_spifc_a1_set_addr(struct amlogic_spifc_a1 *spifc, u32 addr,  in amlogic_spifc_a1_set_addr()  argument
185 	writel(addr, spifc->base + SPIFC_A1_USER_ADDR_REG);  in amlogic_spifc_a1_set_addr()
187 	val = readl(spifc->base + SPIFC_A1_USER_CTRL1_REG);  in amlogic_spifc_a1_set_addr()
190 	writel(val, spifc->base + SPIFC_A1_USER_CTRL1_REG);  in amlogic_spifc_a1_set_addr()
193 static void amlogic_spifc_a1_set_dummy(struct amlogic_spifc_a1 *spifc,  in amlogic_spifc_a1_set_dummy()  argument
196 	u32 val = readl(spifc->base + SPIFC_A1_USER_CTRL2_REG);  in amlogic_spifc_a1_set_dummy()
200 	writel(val, spifc->base + SPIFC_A1_USER_CTRL2_REG);  in amlogic_spifc_a1_set_dummy()
203 static int amlogic_spifc_a1_read(struct amlogic_spifc_a1 *spifc, void *buf,  in amlogic_spifc_a1_read()  argument
206 	u32 val = readl(spifc->base + SPIFC_A1_USER_CTRL3_REG);  in amlogic_spifc_a1_read()
213 	writel(val, spifc->base + SPIFC_A1_USER_CTRL3_REG);  in amlogic_spifc_a1_read()
215 	ret = amlogic_spifc_a1_request(spifc, true);  in amlogic_spifc_a1_read()
217 		amlogic_spifc_a1_drain_buffer(spifc, buf, size);  in amlogic_spifc_a1_read()
222 static int amlogic_spifc_a1_write(struct amlogic_spifc_a1 *spifc,  in amlogic_spifc_a1_write()  argument
227 	amlogic_spifc_a1_fill_buffer(spifc, buf, size);  in amlogic_spifc_a1_write()
229 	val = readl(spifc->base + SPIFC_A1_USER_CTRL1_REG);  in amlogic_spifc_a1_write()
234 	writel(val, spifc->base + SPIFC_A1_USER_CTRL1_REG);  in amlogic_spifc_a1_write()
236 	return amlogic_spifc_a1_request(spifc, false);  in amlogic_spifc_a1_write()
239 static int amlogic_spifc_a1_set_freq(struct amlogic_spifc_a1 *spifc, u32 freq)  in amlogic_spifc_a1_set_freq()  argument
243 	if (freq == spifc->curr_speed_hz)  in amlogic_spifc_a1_set_freq()
246 	ret = clk_set_rate(spifc->clk, freq);  in amlogic_spifc_a1_set_freq()
250 	spifc->curr_speed_hz = freq;  in amlogic_spifc_a1_set_freq()
257 	struct amlogic_spifc_a1 *spifc =  in amlogic_spifc_a1_exec_op()  local
262 	ret = amlogic_spifc_a1_set_freq(spifc, mem->spi->max_speed_hz);  in amlogic_spifc_a1_exec_op()
266 	amlogic_spifc_a1_user_init(spifc);  in amlogic_spifc_a1_exec_op()
267 	amlogic_spifc_a1_set_cmd(spifc, SPIFC_A1_USER_CMD(op));  in amlogic_spifc_a1_exec_op()
270 		amlogic_spifc_a1_set_addr(spifc, op->addr.val,  in amlogic_spifc_a1_exec_op()
274 		amlogic_spifc_a1_set_dummy(spifc, SPIFC_A1_USER_DUMMY(op));  in amlogic_spifc_a1_exec_op()
279 		writel(0, spifc->base + SPIFC_A1_USER_DBUF_ADDR_REG);  in amlogic_spifc_a1_exec_op()
282 			ret = amlogic_spifc_a1_read(spifc, op->data.buf.in,  in amlogic_spifc_a1_exec_op()
285 			ret = amlogic_spifc_a1_write(spifc, op->data.buf.out,  in amlogic_spifc_a1_exec_op()
288 		ret = amlogic_spifc_a1_request(spifc, false);  in amlogic_spifc_a1_exec_op()
301 static void amlogic_spifc_a1_hw_init(struct amlogic_spifc_a1 *spifc)  in amlogic_spifc_a1_hw_init()  argument
305 	regv = readl(spifc->base + SPIFC_A1_AHB_REQ_CTRL_REG);  in amlogic_spifc_a1_hw_init()
307 	writel(regv, spifc->base + SPIFC_A1_AHB_REQ_CTRL_REG);  in amlogic_spifc_a1_hw_init()
309 	regv = readl(spifc->base + SPIFC_A1_AHB_CTRL_REG);  in amlogic_spifc_a1_hw_init()
311 	writel(regv, spifc->base + SPIFC_A1_AHB_CTRL_REG);  in amlogic_spifc_a1_hw_init()
313 	writel(SPIFC_A1_ACTIMING0_VAL, spifc->base + SPIFC_A1_ACTIMING0_REG);  in amlogic_spifc_a1_hw_init()
315 	writel(0, spifc->base + SPIFC_A1_USER_DBUF_ADDR_REG);  in amlogic_spifc_a1_hw_init()
326 	struct amlogic_spifc_a1 *spifc;  in amlogic_spifc_a1_probe()  local
329 	ctrl = devm_spi_alloc_host(&pdev->dev, sizeof(*spifc));  in amlogic_spifc_a1_probe()
333 	spifc = spi_controller_get_devdata(ctrl);  in amlogic_spifc_a1_probe()
334 	platform_set_drvdata(pdev, spifc);  in amlogic_spifc_a1_probe()
336 	spifc->dev = &pdev->dev;  in amlogic_spifc_a1_probe()
337 	spifc->ctrl = ctrl;  in amlogic_spifc_a1_probe()
339 	spifc->base = devm_platform_ioremap_resource(pdev, 0);  in amlogic_spifc_a1_probe()
340 	if (IS_ERR(spifc->base))  in amlogic_spifc_a1_probe()
341 		return PTR_ERR(spifc->base);  in amlogic_spifc_a1_probe()
343 	spifc->clk = devm_clk_get_enabled(spifc->dev, NULL);  in amlogic_spifc_a1_probe()
344 	if (IS_ERR(spifc->clk))  in amlogic_spifc_a1_probe()
345 		return dev_err_probe(spifc->dev, PTR_ERR(spifc->clk),  in amlogic_spifc_a1_probe()
348 	amlogic_spifc_a1_hw_init(spifc);  in amlogic_spifc_a1_probe()
350 	pm_runtime_set_autosuspend_delay(spifc->dev, 500);  in amlogic_spifc_a1_probe()
351 	pm_runtime_use_autosuspend(spifc->dev);  in amlogic_spifc_a1_probe()
352 	devm_pm_runtime_enable(spifc->dev);  in amlogic_spifc_a1_probe()
364 	ret = devm_spi_register_controller(spifc->dev, ctrl);  in amlogic_spifc_a1_probe()
366 		return dev_err_probe(spifc->dev, ret,  in amlogic_spifc_a1_probe()
375 	struct amlogic_spifc_a1 *spifc = dev_get_drvdata(dev);  in amlogic_spifc_a1_suspend()  local
378 	ret = spi_controller_suspend(spifc->ctrl);  in amlogic_spifc_a1_suspend()
383 		clk_disable_unprepare(spifc->clk);  in amlogic_spifc_a1_suspend()
390 	struct amlogic_spifc_a1 *spifc = dev_get_drvdata(dev);  in amlogic_spifc_a1_resume()  local
394 		ret = clk_prepare_enable(spifc->clk);  in amlogic_spifc_a1_resume()
399 	amlogic_spifc_a1_hw_init(spifc);  in amlogic_spifc_a1_resume()
401 	ret = spi_controller_resume(spifc->ctrl);  in amlogic_spifc_a1_resume()
403 		clk_disable_unprepare(spifc->clk);  in amlogic_spifc_a1_resume()
412 	struct amlogic_spifc_a1 *spifc = dev_get_drvdata(dev);  in amlogic_spifc_a1_runtime_suspend()  local
414 	clk_disable_unprepare(spifc->clk);  in amlogic_spifc_a1_runtime_suspend()
421 	struct amlogic_spifc_a1 *spifc = dev_get_drvdata(dev);  in amlogic_spifc_a1_runtime_resume()  local
424 	ret = clk_prepare_enable(spifc->clk);  in amlogic_spifc_a1_runtime_resume()
426 		amlogic_spifc_a1_hw_init(spifc);  in amlogic_spifc_a1_runtime_resume()
442 	{ .compatible = "amlogic,a1-spifc", },
451 		.name		= "amlogic-spifc-a1",
459 MODULE_DESCRIPTION("Amlogic A1 SPIFC driver");