drv: add missing file to repository

The repository evolved with the assumpiton that the platform header file and the top-level for SPEC were included Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

drv: add missing file to repository
The repository evolved with the assumpiton that the platform header file and the top-level for SPEC were included Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
3fa73cd3 · Federico Vaga · 510c2b5e · 3fa73cd3 · 3fa73cd3
Commit 3fa73cd3 authored Aug 03, 2020 by Federico Vaga
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fmc-adc-100m14b4ch-spec-core.c kernel/fmc-adc-100m14b4ch-spec-core.c +136 -0

fmc-adc-100m14b4cha.h kernel/platform_data/fmc-adc-100m14b4cha.h +27 -0

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--- a/kernel/fmc-adc-100m14b4ch-spec-core.c
+++ b/kernel/fmc-adc-100m14b4ch-spec-core.c
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2020 CERN (www.cern.ch)
+ * Author: Federico Vaga <federico.vaga@cern.ch>
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include "platform_data/fmc-adc-100m14b4cha.h"
+
+enum fa_spec_dev_offsets {
+	FA_SPEC_ADC_MEM_START = 0x000002000,
+	FA_SPEC_ADC_MEM_END = 0x000003FFF,
+};
+
+static const struct fmc_adc_platform_data fmc_adc_pdata = {
+	.flags = 0,
+	.calib_trig_time = 0,
+	.calib_trig_threshold = 0,
+	.calib_trig_internal = 0,
+};
+
+static int fa_spec_probe(struct platform_device *pdev) {
+	static struct resource fa_spec_fdt_res[] = {
+		{
+			.name = "fmc-adc-mem",
+			.flags = IORESOURCE_MEM,
+		},
+		{
+			.name = "fmc-adc-dma",
+			.flags = IORESOURCE_DMA,
+		},
+		{
+			.name = "fmc-adc-irq",
+			.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHLEVEL,
+		}};
+	struct platform_device_info pdevinfo = {
+		.parent = &pdev->dev,
+		.name = "fmc-adc-100m",
+		.id = PLATFORM_DEVID_AUTO,
+		.res = fa_spec_fdt_res,
+		.num_res = ARRAY_SIZE(fa_spec_fdt_res),
+		.data = &fmc_adc_pdata,
+		.size_data = sizeof(fmc_adc_pdata),
+		.dma_mask = DMA_BIT_MASK(32),
+	};
+	struct platform_device *pdev_child;
+	struct resource *rmem;
+	struct resource *r;
+	int irq;
+	int dma_dev_chan;
+
+	rmem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!rmem) {
+		dev_err(&pdev->dev, "Missing memory resource\n");
+		return -EINVAL;
+	}
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		dev_err(&pdev->dev, "Missing IRQ number\n");
+		return -EINVAL;
+	}
+
+	r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+	if (!r) {
+		dev_err(&pdev->dev, "Missing DMA engine\n");
+		return -EINVAL;
+	}
+	dma_dev_chan = r->start;
+
+	fa_spec_fdt_res[0].parent = rmem;
+	fa_spec_fdt_res[0].start = rmem->start + FA_SPEC_ADC_MEM_START;
+	fa_spec_fdt_res[0].end = rmem->start + FA_SPEC_ADC_MEM_END;
+	fa_spec_fdt_res[1].start = dma_dev_chan;
+	fa_spec_fdt_res[2].start = irq;
+
+	pdev_child = platform_device_register_full(&pdevinfo);
+	if (IS_ERR(pdev_child))
+		return PTR_ERR(pdev_child);
+	platform_set_drvdata(pdev, pdev_child);
+	return 0;
+}
+
+static int fa_spec_remove(struct platform_device *pdev) {
+	struct platform_device *pdev_child = platform_get_drvdata(pdev);
+
+	platform_device_unregister(pdev_child);
+
+	return 0;
+}
+
+/**
+ * List of supported platform
+ */
+enum fa_spec_version {
+	FA_SPEC_VER = 0,
+};
+
+static const struct platform_device_id fa_spec_id_table[] = {
+	{
+		.name = "fmc-adc-100m-spec",
+		.driver_data = FA_SPEC_VER,
+	},
+	{
+		.name = "id:000010DC41444301",
+		.driver_data = FA_SPEC_VER,
+	},
+	{
+		.name = "id:000010dc41444301",
+		.driver_data = FA_SPEC_VER,
+	},
+	{},
+};
+
+static struct platform_driver fa_spec_driver = {
+	.driver =
+        {
+		.name = "fmc-adc-spec",
+		.owner = THIS_MODULE,
+        },
+	.id_table = fa_spec_id_table,
+	.probe = fa_spec_probe,
+	.remove = fa_spec_remove,
+};
+module_platform_driver(fa_spec_driver);
+
+MODULE_AUTHOR("Federico Vaga <federico.vaga@cern.ch>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(VERSION);
+MODULE_DESCRIPTION("Driver for the SPEC ADC 100 MSamples 14 bits 4 Channels");
+MODULE_DEVICE_TABLE(platform, fa_spec_id_table);
+
+MODULE_SOFTDEP("pre: spec_fmc_carrier fmc-adc-100m14b4ch");
--- a/kernel/platform_data/fmc-adc-100m14b4cha.h
+++ b/kernel/platform_data/fmc-adc-100m14b4cha.h
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2020 CERN (www.cern.ch)
+ * Author: Federico Vaga <federico.vaga@cern.ch>
+ */
+
+#ifndef __FMC_ADC_PDATA_H__
+#define __FMC_ADC_PDATA_H__
+
+#define FMC_ADC_BIG_ENDIAN BIT(0)
+#define FMC_ADC_NOSQUASH_SCATTERLIST BIT(1)
+/*
+ * In principle this should not be necessary. The two variants should
+ * be as close as possible to each other. But this is not the case, the DMA
+ * interface is different and we need to distinguish between SPEC and SVEC.
+ * NOTE any other carrier is not supported!
+ */
+#define FMC_ADC_SVEC BIT(3)
+
+struct fmc_adc_platform_data {
+	unsigned long flags;
+	uint8_t calib_trig_time;
+	uint8_t calib_trig_threshold;
+	uint8_t calib_trig_internal;
+};
+
+#endif