1 files changed, 136 insertions, 0 deletions
diff --git a/drivers/mfd/davinci_voicecodec.c b/drivers/mfd/davinci_voicecodec.c
new file mode 100644
index 000000000..965820481
--- /dev/null
+++ b/drivers/mfd/davinci_voicecodec.c
@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DaVinci Voice Codec Core Interface for TI platforms
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc
+ *
+ * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/regmap.h>
+
+#include <sound/pcm.h>
+
+#include <linux/mfd/davinci_voicecodec.h>
+
+static const struct regmap_config davinci_vc_regmap = {
+	.reg_bits = 32,
+	.val_bits = 32,
+};
+
+static int __init davinci_vc_probe(struct platform_device *pdev)
+{
+	struct davinci_vc *davinci_vc;
+	struct resource *res;
+	struct mfd_cell *cell = NULL;
+	dma_addr_t fifo_base;
+	int ret;
+
+	davinci_vc = devm_kzalloc(&pdev->dev,
+				  sizeof(struct davinci_vc), GFP_KERNEL);
+	if (!davinci_vc)
+		return -ENOMEM;
+
+	davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(davinci_vc->clk)) {
+		dev_dbg(&pdev->dev,
+			    "could not get the clock for voice codec\n");
+		return -ENODEV;
+	}
+	clk_enable(davinci_vc->clk);
+
+	davinci_vc->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+	if (IS_ERR(davinci_vc->base)) {
+		ret = PTR_ERR(davinci_vc->base);
+		goto fail;
+	}
+	fifo_base = (dma_addr_t)res->start;
+
+	davinci_vc->regmap = devm_regmap_init_mmio(&pdev->dev,
+						   davinci_vc->base,
+						   &davinci_vc_regmap);
+	if (IS_ERR(davinci_vc->regmap)) {
+		ret = PTR_ERR(davinci_vc->regmap);
+		goto fail;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "no DMA resource\n");
+		ret = -ENXIO;
+		goto fail;
+	}
+
+	davinci_vc->davinci_vcif.dma_tx_channel = res->start;
+	davinci_vc->davinci_vcif.dma_tx_addr = fifo_base + DAVINCI_VC_WFIFO;
+
+	res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
+	if (!res) {
+		dev_err(&pdev->dev, "no DMA resource\n");
+		ret = -ENXIO;
+		goto fail;
+	}
+
+	davinci_vc->davinci_vcif.dma_rx_channel = res->start;
+	davinci_vc->davinci_vcif.dma_rx_addr = fifo_base + DAVINCI_VC_RFIFO;
+
+	davinci_vc->dev = &pdev->dev;
+	davinci_vc->pdev = pdev;
+
+	/* Voice codec interface client */
+	cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL];
+	cell->name = "davinci-vcif";
+	cell->platform_data = davinci_vc;
+	cell->pdata_size = sizeof(*davinci_vc);
+
+	/* Voice codec CQ93VC client */
+	cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
+	cell->name = "cq93vc-codec";
+	cell->platform_data = davinci_vc;
+	cell->pdata_size = sizeof(*davinci_vc);
+
+	ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
+			      DAVINCI_VC_CELLS, NULL, 0, NULL);
+	if (ret != 0) {
+		dev_err(&pdev->dev, "fail to register client devices\n");
+		goto fail;
+	}
+
+	return 0;
+
+fail:
+	clk_disable(davinci_vc->clk);
+
+	return ret;
+}
+
+static int davinci_vc_remove(struct platform_device *pdev)
+{
+	struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
+
+	mfd_remove_devices(&pdev->dev);
+
+	clk_disable(davinci_vc->clk);
+
+	return 0;
+}
+
+static struct platform_driver davinci_vc_driver = {
+	.driver	= {
+		.name = "davinci_voicecodec",
+	},
+	.remove	= davinci_vc_remove,
+};
+
+module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);
+
+MODULE_AUTHOR("Miguel Aguilar");
+MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
+MODULE_LICENSE("GPL");