MFD: DaVinci Voice Codec
Miguel Aguilar [Thu, 11 Mar 2010 15:32:21 +0000 (09:32 -0600)]
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@ridgerun.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

drivers/mfd/Kconfig
drivers/mfd/Makefile
drivers/mfd/davinci_voicecodec.c [new file with mode: 0644]
include/linux/mfd/davinci_voicecodec.h [new file with mode: 0644]

index 951fa9b..20e3229 100644 (file)
@@ -53,6 +53,10 @@ 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
index 22715ad..4fbf8f8 100644 (file)
@@ -12,6 +12,7 @@ obj-$(CONFIG_HTC_EGPIO)               += htc-egpio.o
 obj-$(CONFIG_HTC_PASIC3)       += htc-pasic3.o
 obj-$(CONFIG_HTC_I2CPLD)       += htc-i2cpld.o
 
+obj-$(CONFIG_MFD_DAVINCI_VOICECODEC)   += davinci_voicecodec.o
 obj-$(CONFIG_MFD_DM355EVM_MSP) += dm355evm_msp.o
 
 obj-$(CONFIG_MFD_T7L66XB)      += t7l66xb.o tmio_core.o
diff --git a/drivers/mfd/davinci_voicecodec.c b/drivers/mfd/davinci_voicecodec.c
new file mode 100644 (file)
index 0000000..9886aa8
--- /dev/null
@@ -0,0 +1,189 @@
+/*
+ * 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/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 (file)
index 0000000..0ab6132
--- /dev/null
@@ -0,0 +1,126 @@
+/*
+ * 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
+ */
+
+#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