1 // SPDX-License-Identifier: GPL-2.0-only
3  * Analog Devices Generic AXI ADC IP core
6  * Copyright 2012-2020 Analog Devices Inc.
22 #include <linux/iio/buffer-dmaengine.h>
24 #include <linux/fpga/adi-axi-common.h>
25 #include <linux/iio/adc/adi-axi-adc.h>
32 /* ADC controls */
39 /* ADC Channel controls */
97 	iowrite32(val, st->regs + reg);  in adi_axi_adc_write()
103 	return ioread32(st->regs + reg);  in adi_axi_adc_read()
114 	if (device_property_read_string(dev, "dma-names", &dma_name))  in adi_axi_adc_config_dma_buffer()
117 	return devm_iio_dmaengine_buffer_setup(indio_dev->dev.parent,  in adi_axi_adc_config_dma_buffer()
126 	struct adi_axi_adc_conv *conv = &st->client->conv;  in adi_axi_adc_read_raw()
128 	if (!conv->read_raw)  in adi_axi_adc_read_raw()
129 		return -EOPNOTSUPP;  in adi_axi_adc_read_raw()
131 	return conv->read_raw(conv, chan, val, val2, mask);  in adi_axi_adc_read_raw()
139 	struct adi_axi_adc_conv *conv = &st->client->conv;  in adi_axi_adc_write_raw()
141 	if (!conv->write_raw)  in adi_axi_adc_write_raw()
142 		return -EOPNOTSUPP;  in adi_axi_adc_write_raw()
144 	return conv->write_raw(conv, chan, val, val2, mask);  in adi_axi_adc_write_raw()
153 	struct adi_axi_adc_conv *conv = &st->client->conv;  in adi_axi_adc_read_avail()
155 	if (!conv->read_avail)  in adi_axi_adc_read_avail()
156 		return -EOPNOTSUPP;  in adi_axi_adc_read_avail()
158 	return conv->read_avail(conv, chan, vals, type, length, mask);  in adi_axi_adc_read_avail()
165 	struct adi_axi_adc_conv *conv = &st->client->conv;  in adi_axi_adc_update_scan_mode()
168 	for (i = 0; i < conv->chip_info->num_channels; i++) {  in adi_axi_adc_update_scan_mode()
194 		return ERR_PTR(-ENOMEM);  in adi_axi_adc_conv_register()
198 	cl->dev = get_device(dev);  in adi_axi_adc_conv_register()
200 	list_add_tail(&cl->entry, &registered_clients);  in adi_axi_adc_conv_register()
204 	return &cl->conv;  in adi_axi_adc_conv_register()
213 	list_del(&cl->entry);  in adi_axi_adc_conv_unregister()
214 	put_device(cl->dev);  in adi_axi_adc_conv_unregister()
264 		return ERR_PTR(-ENODEV);  in adi_axi_adc_attach_client()
266 	cln = of_parse_phandle(dev->of_node, "adi,adc-dev", 0);  in adi_axi_adc_attach_client()
268 		dev_err(dev, "No 'adi,adc-dev' node defined\n");  in adi_axi_adc_attach_client()
269 		return ERR_PTR(-ENODEV);  in adi_axi_adc_attach_client()
275 		if (!cl->dev)  in adi_axi_adc_attach_client()
278 		if (cl->dev->of_node != cln)  in adi_axi_adc_attach_client()
281 		if (!try_module_get(cl->dev->driver->owner)) {  in adi_axi_adc_attach_client()
284 			return ERR_PTR(-ENODEV);  in adi_axi_adc_attach_client()
287 		get_device(cl->dev);  in adi_axi_adc_attach_client()
288 		cl->info = info;  in adi_axi_adc_attach_client()
297 	return ERR_PTR(-EPROBE_DEFER);  in adi_axi_adc_attach_client()
303 	struct adi_axi_adc_conv *conv = &st->client->conv;  in adi_axi_adc_setup_channels()
306 	if (conv->preenable_setup) {  in adi_axi_adc_setup_channels()
307 		ret = conv->preenable_setup(conv);  in adi_axi_adc_setup_channels()
312 	for (i = 0; i < conv->chip_info->num_channels; i++) {  in adi_axi_adc_setup_channels()
334 	put_device(cl->dev);  in adi_axi_adc_cleanup()
335 	module_put(cl->dev->driver->owner);  in adi_axi_adc_cleanup()
347 	cl = adi_axi_adc_attach_client(&pdev->dev);  in adi_axi_adc_probe()
351 	ret = devm_add_action_or_reset(&pdev->dev, adi_axi_adc_cleanup, cl);  in adi_axi_adc_probe()
355 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*st));  in adi_axi_adc_probe()
357 		return -ENOMEM;  in adi_axi_adc_probe()
360 	st->client = cl;  in adi_axi_adc_probe()
361 	cl->state = st;  in adi_axi_adc_probe()
362 	mutex_init(&st->lock);  in adi_axi_adc_probe()
364 	st->regs = devm_platform_ioremap_resource(pdev, 0);  in adi_axi_adc_probe()
365 	if (IS_ERR(st->regs))  in adi_axi_adc_probe()
366 		return PTR_ERR(st->regs);  in adi_axi_adc_probe()
368 	conv = &st->client->conv;  in adi_axi_adc_probe()
374 	if (cl->info->version > ver) {  in adi_axi_adc_probe()
375 		dev_err(&pdev->dev,  in adi_axi_adc_probe()
377 			ADI_AXI_PCORE_VER_MAJOR(cl->info->version),  in adi_axi_adc_probe()
378 			ADI_AXI_PCORE_VER_MINOR(cl->info->version),  in adi_axi_adc_probe()
379 			ADI_AXI_PCORE_VER_PATCH(cl->info->version),  in adi_axi_adc_probe()
383 		return -ENODEV;  in adi_axi_adc_probe()
386 	indio_dev->info = &adi_axi_adc_info;  in adi_axi_adc_probe()
387 	indio_dev->name = "adi-axi-adc";  in adi_axi_adc_probe()
388 	indio_dev->modes = INDIO_DIRECT_MODE;  in adi_axi_adc_probe()
389 	indio_dev->num_channels = conv->chip_info->num_channels;  in adi_axi_adc_probe()
390 	indio_dev->channels = conv->chip_info->channels;  in adi_axi_adc_probe()
392 	ret = adi_axi_adc_config_dma_buffer(&pdev->dev, indio_dev);  in adi_axi_adc_probe()
396 	ret = adi_axi_adc_setup_channels(&pdev->dev, st);  in adi_axi_adc_probe()
400 	ret = devm_iio_device_register(&pdev->dev, indio_dev);  in adi_axi_adc_probe()
404 	dev_info(&pdev->dev, "AXI ADC IP core (%d.%.2d.%c) probed\n",  in adi_axi_adc_probe()
414 	{ .compatible = "adi,axi-adc-10.0.a", .data = &adi_axi_adc_10_0_a_info },
429 MODULE_DESCRIPTION("Analog Devices Generic AXI ADC IP core driver");