1 // SPDX-License-Identifier: GPL-2.0-only
3  * Analog Devices Generic AXI ADC IP core
6  * Copyright 2012-2020 Analog Devices Inc.
23 #include <linux/fpga/adi-axi-common.h>
26 #include <linux/iio/buffer-dmaengine.h>
35 /* ADC controls */
48 /* ADC Channel controls */
52 #define   ADI_AXI_REG_CHAN_CTRL_PN_SEL_OWR	BIT(10)
96 	guard(mutex)(&st->lock);  in axi_adc_enable()
97 	ret = regmap_set_bits(st->regmap, ADI_AXI_REG_RSTN,  in axi_adc_enable()
107 	ret = regmap_read_poll_timeout(st->regmap, ADI_AXI_ADC_REG_DRP_STATUS,  in axi_adc_enable()
113 	return regmap_set_bits(st->regmap, ADI_AXI_REG_RSTN,  in axi_adc_enable()
121 	guard(mutex)(&st->lock);  in axi_adc_disable()
122 	regmap_write(st->regmap, ADI_AXI_REG_RSTN, 0);  in axi_adc_disable()
131 	if (!data->enable)  in axi_adc_data_format_set()
132 		return regmap_clear_bits(st->regmap,  in axi_adc_data_format_set()
137 	if (data->sign_extend)  in axi_adc_data_format_set()
139 	if (data->type == IIO_BACKEND_OFFSET_BINARY)  in axi_adc_data_format_set()
142 	return regmap_update_bits(st->regmap, ADI_AXI_REG_CHAN_CTRL(chan),  in axi_adc_data_format_set()
153 		return regmap_clear_bits(st->regmap, ADI_AXI_ADC_REG_CTRL,  in axi_adc_data_sample_trigger()
156 		return regmap_set_bits(st->regmap, ADI_AXI_ADC_REG_CTRL,  in axi_adc_data_sample_trigger()
159 		return -EINVAL;  in axi_adc_data_sample_trigger()
171 		return -EINVAL;  in axi_adc_iodelays_set()
173 		return -EINVAL;  in axi_adc_iodelays_set()
175 	guard(mutex)(&st->lock);  in axi_adc_iodelays_set()
176 	ret = regmap_write(st->regmap, ADI_AXI_ADC_REG_DELAY(lane), tap);  in axi_adc_iodelays_set()
183 	ret = regmap_read(st->regmap, ADI_AXI_ADC_REG_DELAY(lane), &val);  in axi_adc_iodelays_set()
187 		return -EIO;  in axi_adc_iodelays_set()
203 		return regmap_update_bits(st->regmap, ADI_AXI_ADC_REG_CHAN_CTRL_3(chan),  in axi_adc_test_pattern_set()
207 		return regmap_update_bits(st->regmap, ADI_AXI_ADC_REG_CHAN_CTRL_3(chan),  in axi_adc_test_pattern_set()
211 		return -EINVAL;  in axi_adc_test_pattern_set()
220 	guard(mutex)(&st->lock);  in axi_adc_read_chan_status()
222 	ret = regmap_write(st->regmap, ADI_AXI_ADC_REG_CHAN_STATUS(chan),  in axi_adc_read_chan_status()
230 	return regmap_read(st->regmap, ADI_AXI_ADC_REG_CHAN_STATUS(chan),  in axi_adc_read_chan_status()
281 	return regmap_set_bits(st->regmap, ADI_AXI_REG_CHAN_CTRL(chan),  in axi_adc_chan_enable()
289 	return regmap_clear_bits(st->regmap, ADI_AXI_REG_CHAN_CTRL(chan),  in axi_adc_chan_disable()
299 	if (device_property_read_string(st->dev, "dma-names", &dma_name))  in axi_adc_request_buffer()
302 	return iio_dmaengine_buffer_setup(st->dev, indio_dev, dma_name);  in axi_adc_request_buffer()
317 		return regmap_read(st->regmap, reg, readval);  in axi_adc_reg_access()
319 	return regmap_write(st->regmap, reg, writeval);  in axi_adc_reg_access()
345 	.name = "axi-adc",
358 	st = devm_kzalloc(&pdev->dev, sizeof(*st), GFP_KERNEL);  in adi_axi_adc_probe()
360 		return -ENOMEM;  in adi_axi_adc_probe()
366 	st->dev = &pdev->dev;  in adi_axi_adc_probe()
367 	st->regmap = devm_regmap_init_mmio(&pdev->dev, base,  in adi_axi_adc_probe()
369 	if (IS_ERR(st->regmap))  in adi_axi_adc_probe()
370 		return dev_err_probe(&pdev->dev, PTR_ERR(st->regmap),  in adi_axi_adc_probe()
373 	expected_ver = device_get_match_data(&pdev->dev);  in adi_axi_adc_probe()
375 		return -ENODEV;  in adi_axi_adc_probe()
377 	clk = devm_clk_get_enabled(&pdev->dev, NULL);  in adi_axi_adc_probe()
379 		return dev_err_probe(&pdev->dev, PTR_ERR(clk),  in adi_axi_adc_probe()
386 	ret = regmap_write(st->regmap, ADI_AXI_REG_RSTN, 0);  in adi_axi_adc_probe()
390 	ret = regmap_read(st->regmap, ADI_AXI_REG_VERSION, &ver);  in adi_axi_adc_probe()
395 		dev_err(&pdev->dev,  in adi_axi_adc_probe()
403 		return -ENODEV;  in adi_axi_adc_probe()
406 	ret = devm_iio_backend_register(&pdev->dev, &adi_axi_adc_generic, st);  in adi_axi_adc_probe()
408 		return dev_err_probe(&pdev->dev, ret,  in adi_axi_adc_probe()
411 	dev_info(&pdev->dev, "AXI ADC IP core (%d.%.2d.%c) probed\n",  in adi_axi_adc_probe()
419 static unsigned int adi_axi_adc_10_0_a_info = ADI_AXI_PCORE_VER(10, 0, 'a');
423 	{ .compatible = "adi,axi-adc-10.0.a", .data = &adi_axi_adc_10_0_a_info },
438 MODULE_DESCRIPTION("Analog Devices Generic AXI ADC IP core driver");