Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / mfd / davinci_voicecodec.c

diff --git a/kernel/drivers/mfd/davinci_voicecodec.c b/kernel/drivers/mfd/davinci_voicecodec.c
new file mode 100644 (file)
index 0000000..9bbc642
--- /dev/null
+++ b/kernel/drivers/mfd/davinci_voicecodec.c
@@ -0,0 +1,154 @@
+/*
+ * DaVinci Voice Codec Core Interface for TI platforms
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc
+ *
+ * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#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;
+       int ret;
+
+       davinci_vc = devm_kzalloc(&pdev->dev,
+                                 sizeof(struct davinci_vc), GFP_KERNEL);
+       if (!davinci_vc) {
+               dev_dbg(&pdev->dev,
+                           "could not allocate memory for private data\n");
+               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);
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+       davinci_vc->base = devm_ioremap_resource(&pdev->dev, res);
+       if (IS_ERR(davinci_vc->base)) {
+               ret = PTR_ERR(davinci_vc->base);
+               goto fail;
+       }
+
+       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 =
+               (dma_addr_t)(io_v2p(davinci_vc->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 =
+               (dma_addr_t)(io_v2p(davinci_vc->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");