[alsa-devel] [PATCH v2 1/5] MFD: DaVinci Voice Codec
miguel.aguilar at ridgerun.com
miguel.aguilar at ridgerun.com
Thu Mar 11 16:32:21 CET 2010
From: Miguel Aguilar <miguel.aguilar at ridgerun.com>
This is the MFD driver for the DaVinci Voice codec, it has two clients:
* Voice codec interface
* Voice codec CQ93VC
Signed-off-by: Miguel Aguilar <miguel.aguilar at ridgerun.com>
---
drivers/mfd/Kconfig | 4 +
drivers/mfd/Makefile | 1 +
drivers/mfd/davinci_voicecodec.c | 189 ++++++++++++++++++++++++++++++++
include/linux/mfd/davinci_voicecodec.h | 126 +++++++++++++++++++++
4 files changed, 320 insertions(+), 0 deletions(-)
create mode 100644 drivers/mfd/davinci_voicecodec.c
create mode 100644 include/linux/mfd/davinci_voicecodec.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 8782978..6e93c0b 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -43,6 +43,10 @@ config MFD_SH_MOBILE_SDHI
This driver supports the SDHI hardware block found in many
SuperH Mobile SoCs.
+config MFD_DAVINCI_VOICECODEC
+ tristate
+ select MFD_CORE
+
config MFD_DM355EVM_MSP
bool "DaVinci DM355 EVM microcontroller"
depends on I2C && MACH_DAVINCI_DM355_EVM
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index ca2f2c4..f5c617f 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_MFD_SH_MOBILE_SDHI) += sh_mobile_sdhi.o
obj-$(CONFIG_HTC_EGPIO) += htc-egpio.o
obj-$(CONFIG_HTC_PASIC3) += htc-pasic3.o
+obj-$(CONFIG_MFD_DAVINCI_VOICECODEC) += davinci_voicecodec.o
obj-$(CONFIG_MFD_DM355EVM_MSP) += dm355evm_msp.o
obj-$(CONFIG_MFD_T7L66XB) += t7l66xb.o
diff --git a/drivers/mfd/davinci_voicecodec.c b/drivers/mfd/davinci_voicecodec.c
new file mode 100644
index 0000000..9886aa8
--- /dev/null
+++ b/drivers/mfd/davinci_voicecodec.c
@@ -0,0 +1,189 @@
+/*
+ * DaVinci Voice Codec Core Interface for TI platforms
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc
+ *
+ * Author: Miguel Aguilar <miguel.aguilar at 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/delay.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+
+#include <sound/pcm.h>
+
+#include <linux/mfd/davinci_voicecodec.h>
+
+u32 davinci_vc_read(struct davinci_vc *davinci_vc, int reg)
+{
+ return __raw_readl(davinci_vc->base + reg);
+}
+
+void davinci_vc_write(struct davinci_vc *davinci_vc,
+ int reg, u32 val)
+{
+ __raw_writel(val, davinci_vc->base + reg);
+}
+
+static int __init davinci_vc_probe(struct platform_device *pdev)
+{
+ struct davinci_vc *davinci_vc;
+ struct resource *res, *mem;
+ struct mfd_cell *cell = NULL;
+ int ret;
+
+ davinci_vc = kzalloc(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 = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(davinci_vc->clk)) {
+ dev_dbg(&pdev->dev,
+ "could not get the clock for voice codec\n");
+ ret = -ENODEV;
+ goto fail1;
+ }
+ clk_enable(davinci_vc->clk);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "no mem resource\n");
+ ret = -ENODEV;
+ goto fail2;
+ }
+
+ davinci_vc->pbase = res->start;
+ davinci_vc->base_size = resource_size(res);
+
+ mem = request_mem_region(davinci_vc->pbase, davinci_vc->base_size,
+ pdev->name);
+ if (!mem) {
+ dev_err(&pdev->dev, "VCIF region already claimed\n");
+ ret = -EBUSY;
+ goto fail2;
+ }
+
+ davinci_vc->base = ioremap(davinci_vc->pbase, davinci_vc->base_size);
+ if (!davinci_vc->base) {
+ dev_err(&pdev->dev, "can't ioremap mem resource.\n");
+ ret = -ENOMEM;
+ goto fail3;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "no DMA resource\n");
+ return -ENXIO;
+ }
+
+ 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");
+ return -ENXIO;
+ }
+
+ 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->driver_data = davinci_vc;
+
+ /* Voice codec CQ93VC client */
+ cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
+ cell->name = "cq93vc";
+ cell->driver_data = davinci_vc;
+
+ ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
+ DAVINCI_VC_CELLS, NULL, 0);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "fail to register client devices\n");
+ goto fail4;
+ }
+
+ return 0;
+
+fail4:
+ iounmap(davinci_vc->base);
+fail3:
+ release_mem_region(davinci_vc->pbase, davinci_vc->base_size);
+fail2:
+ clk_disable(davinci_vc->clk);
+ clk_put(davinci_vc->clk);
+ davinci_vc->clk = NULL;
+fail1:
+ kfree(davinci_vc);
+
+ return ret;
+}
+
+static int __devexit davinci_vc_remove(struct platform_device *pdev)
+{
+ struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
+
+ mfd_remove_devices(&pdev->dev);
+
+ iounmap(davinci_vc->base);
+ release_mem_region(davinci_vc->pbase, davinci_vc->base_size);
+
+ clk_disable(davinci_vc->clk);
+ clk_put(davinci_vc->clk);
+ davinci_vc->clk = NULL;
+
+ kfree(davinci_vc);
+
+ return 0;
+}
+
+static struct platform_driver davinci_vc_driver = {
+ .driver = {
+ .name = "davinci_voicecodec",
+ .owner = THIS_MODULE,
+ },
+ .remove = __devexit_p(davinci_vc_remove),
+};
+
+static int __init davinci_vc_init(void)
+{
+ return platform_driver_probe(&davinci_vc_driver, davinci_vc_probe);
+}
+module_init(davinci_vc_init);
+
+static void __exit davinci_vc_exit(void)
+{
+ platform_driver_unregister(&davinci_vc_driver);
+}
+module_exit(davinci_vc_exit);
+
+MODULE_AUTHOR("Miguel Aguilar");
+MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/davinci_voicecodec.h b/include/linux/mfd/davinci_voicecodec.h
new file mode 100644
index 0000000..0ab6132
--- /dev/null
+++ b/include/linux/mfd/davinci_voicecodec.h
@@ -0,0 +1,126 @@
+/*
+ * DaVinci Voice Codec Core Interface for TI platforms
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc
+ *
+ * Author: Miguel Aguilar <miguel.aguilar at 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
+ */
+
+#ifndef __LINUX_MFD_DAVINCI_VOICECODEC_H_
+#define __LINUX_MFD_DAVINIC_VOICECODEC_H_
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/core.h>
+
+#include <mach/edma.h>
+
+/*
+ * Register values.
+ */
+#define DAVINCI_VC_PID 0x00
+#define DAVINCI_VC_CTRL 0x04
+#define DAVINCI_VC_INTEN 0x08
+#define DAVINCI_VC_INTSTATUS 0x0c
+#define DAVINCI_VC_INTCLR 0x10
+#define DAVINCI_VC_EMUL_CTRL 0x14
+#define DAVINCI_VC_RFIFO 0x20
+#define DAVINCI_VC_WFIFO 0x24
+#define DAVINCI_VC_FIFOSTAT 0x28
+#define DAVINCI_VC_TST_CTRL 0x2C
+#define DAVINCI_VC_REG05 0x94
+#define DAVINCI_VC_REG09 0xA4
+#define DAVINCI_VC_REG12 0xB0
+
+/* DAVINCI_VC_CTRL bit fields */
+#define DAVINCI_VC_CTRL_MASK 0x5500
+#define DAVINCI_VC_CTRL_RSTADC BIT(0)
+#define DAVINCI_VC_CTRL_RSTDAC BIT(1)
+#define DAVINCI_VC_CTRL_RD_BITS_8 BIT(4)
+#define DAVINCI_VC_CTRL_RD_UNSIGNED BIT(5)
+#define DAVINCI_VC_CTRL_WD_BITS_8 BIT(6)
+#define DAVINCI_VC_CTRL_WD_UNSIGNED BIT(7)
+#define DAVINCI_VC_CTRL_RFIFOEN BIT(8)
+#define DAVINCI_VC_CTRL_RFIFOCL BIT(9)
+#define DAVINCI_VC_CTRL_RFIFOMD_WORD_1 BIT(10)
+#define DAVINCI_VC_CTRL_WFIFOEN BIT(12)
+#define DAVINCI_VC_CTRL_WFIFOCL BIT(13)
+#define DAVINCI_VC_CTRL_WFIFOMD_WORD_1 BIT(14)
+
+/* DAVINCI_VC_INT bit fields */
+#define DAVINCI_VC_INT_MASK 0x3F
+#define DAVINCI_VC_INT_RDRDY_MASK BIT(0)
+#define DAVINCI_VC_INT_RERROVF_MASK BIT(1)
+#define DAVINCI_VC_INT_RERRUDR_MASK BIT(2)
+#define DAVINCI_VC_INT_WDREQ_MASK BIT(3)
+#define DAVINCI_VC_INT_WERROVF_MASKBIT BIT(4)
+#define DAVINCI_VC_INT_WERRUDR_MASK BIT(5)
+
+/* DAVINCI_VC_REG05 bit fields */
+#define DAVINCI_VC_REG05_PGA_GAIN 0x07
+
+/* DAVINCI_VC_REG09 bit fields */
+#define DAVINCI_VC_REG09_MUTE 0x40
+#define DAVINCI_VC_REG09_DIG_ATTEN 0x3F
+
+/* DAVINCI_VC_REG12 bit fields */
+#define DAVINCI_VC_REG12_POWER_ALL_ON 0xFD
+#define DAVINCI_VC_REG12_POWER_ALL_OFF 0x00
+
+#define DAVINCI_VC_CELLS 2
+
+enum davinci_vc_cells {
+ DAVINCI_VC_VCIF_CELL,
+ DAVINCI_VC_CQ93VC_CELL,
+};
+
+struct davinci_vcif {
+ struct platform_device *pdev;
+ u32 dma_tx_channel;
+ u32 dma_rx_channel;
+ dma_addr_t dma_tx_addr;
+ dma_addr_t dma_rx_addr;
+};
+
+struct cq93vc {
+ struct platform_device *pdev;
+ struct snd_soc_codec *codec;
+ u32 sysclk;
+};
+
+struct davinci_vc;
+
+struct davinci_vc {
+ /* Device data */
+ struct device *dev;
+ struct platform_device *pdev;
+ struct clk *clk;
+
+ /* Memory resources */
+ void __iomem *base;
+ resource_size_t pbase;
+ size_t base_size;
+
+ /* MFD cells */
+ struct mfd_cell cells[DAVINCI_VC_CELLS];
+
+ /* Client devices */
+ struct davinci_vcif davinci_vcif;
+ struct cq93vc cq93vc;
+};
+
+#endif
--
1.6.0.4
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