--- /dev/null
+/*
+ * tegra_das.c - Tegra DAS driver
+ *
+ * Author: Stephen Warren <swarren@nvidia.com>
+ * Copyright (C) 2010 - NVIDIA, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <mach/iomap.h>
+#include <sound/soc.h>
+#include "tegra_das.h"
+
+#define DRV_NAME "tegra-das"
+
+static struct tegra_das *das;
+
+static inline void tegra_das_write(u32 reg, u32 val)
+{
+ __raw_writel(val, das->regs + reg);
+}
+
+static inline u32 tegra_das_read(u32 reg)
+{
+ return __raw_readl(das->regs + reg);
+}
+
+int tegra_das_connect_dap_to_dac(int dap, int dac)
+{
+ u32 addr;
+ u32 reg;
+
+ if (!das)
+ return -ENODEV;
+
+ addr = TEGRA_DAS_DAP_CTRL_SEL +
+ (dap * TEGRA_DAS_DAP_CTRL_SEL_STRIDE);
+ reg = dac << TEGRA_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL_P;
+
+ tegra_das_write(addr, reg);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(tegra_das_connect_dap_to_dac);
+
+int tegra_das_connect_dap_to_dap(int dap, int otherdap, int master,
+ int sdata1rx, int sdata2rx)
+{
+ u32 addr;
+ u32 reg;
+
+ if (!das)
+ return -ENODEV;
+
+ addr = TEGRA_DAS_DAP_CTRL_SEL +
+ (dap * TEGRA_DAS_DAP_CTRL_SEL_STRIDE);
+ reg = otherdap << TEGRA_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL_P |
+ !!sdata2rx << TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA2_TX_RX_P |
+ !!sdata1rx << TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA1_TX_RX_P |
+ !!master << TEGRA_DAS_DAP_CTRL_SEL_DAP_MS_SEL_P;
+
+ tegra_das_write(addr, reg);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(tegra_das_connect_dap_to_dap);
+
+int tegra_das_connect_dac_to_dap(int dac, int dap)
+{
+ u32 addr;
+ u32 reg;
+
+ if (!das)
+ return -ENODEV;
+
+ addr = TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL +
+ (dac * TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_STRIDE);
+ reg = dap << TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL_P |
+ dap << TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL_P |
+ dap << TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL_P;
+
+ tegra_das_write(addr, reg);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(tegra_das_connect_dac_to_dap);
+
+#ifdef CONFIG_DEBUG_FS
+static int tegra_das_show(struct seq_file *s, void *unused)
+{
+ int i;
+ u32 addr;
+ u32 reg;
+
+ for (i = 0; i < TEGRA_DAS_DAP_CTRL_SEL_COUNT; i++) {
+ addr = TEGRA_DAS_DAP_CTRL_SEL +
+ (i * TEGRA_DAS_DAP_CTRL_SEL_STRIDE);
+ reg = tegra_das_read(addr);
+ seq_printf(s, "TEGRA_DAS_DAP_CTRL_SEL[%d] = %08x\n", i, reg);
+ }
+
+ for (i = 0; i < TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_COUNT; i++) {
+ addr = TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL +
+ (i * TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_STRIDE);
+ reg = tegra_das_read(addr);
+ seq_printf(s, "TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL[%d] = %08x\n",
+ i, reg);
+ }
+
+ return 0;
+}
+
+static int tegra_das_debug_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, tegra_das_show, inode->i_private);
+}
+
+static const struct file_operations tegra_das_debug_fops = {
+ .open = tegra_das_debug_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void tegra_das_debug_add(struct tegra_das *das)
+{
+ das->debug = debugfs_create_file(DRV_NAME, S_IRUGO, asoc_debugfs_root,
+ das, &tegra_das_debug_fops);
+}
+
+static void tegra_das_debug_remove(struct tegra_das *das)
+{
+ if (das->debug)
+ debugfs_remove(das->debug);
+}
+#else
+static inline void tegra_das_debug_add(struct tegra_das *das)
+{
+}
+
+static inline void tegra_das_debug_remove(struct tegra_das *das)
+{
+}
+#endif
+
+static int __devinit tegra_das_probe(struct platform_device *pdev)
+{
+ struct resource *res, *region;
+ int ret = 0;
+
+ if (das)
+ return -ENODEV;
+
+ das = kzalloc(sizeof(struct tegra_das), GFP_KERNEL);
+ if (!das) {
+ dev_err(&pdev->dev, "Can't allocate tegra_das\n");
+ ret = -ENOMEM;
+ goto exit;
+ }
+ das->dev = &pdev->dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "No memory resource\n");
+ ret = -ENODEV;
+ goto err_free;
+ }
+
+ region = request_mem_region(res->start, resource_size(res),
+ pdev->name);
+ if (!region) {
+ dev_err(&pdev->dev, "Memory region already claimed\n");
+ ret = -EBUSY;
+ goto err_free;
+ }
+
+ das->regs = ioremap(res->start, resource_size(res));
+ if (!das->regs) {
+ dev_err(&pdev->dev, "ioremap failed\n");
+ ret = -ENOMEM;
+ goto err_release;
+ }
+
+ tegra_das_debug_add(das);
+
+ platform_set_drvdata(pdev, das);
+
+ return 0;
+
+err_release:
+ release_mem_region(res->start, resource_size(res));
+err_free:
+ kfree(das);
+ das = 0;
+exit:
+ return ret;
+}
+
+static int __devexit tegra_das_remove(struct platform_device *pdev)
+{
+ struct resource *res;
+
+ if (!das)
+ return -ENODEV;
+
+ platform_set_drvdata(pdev, NULL);
+
+ tegra_das_debug_remove(das);
+
+ iounmap(das->regs);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ release_mem_region(res->start, resource_size(res));
+
+ kfree(das);
+ das = 0;
+
+ return 0;
+}
+
+static struct platform_driver tegra_das_driver = {
+ .probe = tegra_das_probe,
+ .remove = __devexit_p(tegra_das_remove),
+ .driver = {
+ .name = DRV_NAME,
+ },
+};
+
+static int __init tegra_das_modinit(void)
+{
+ return platform_driver_register(&tegra_das_driver);
+}
+module_init(tegra_das_modinit);
+
+static void __exit tegra_das_modexit(void)
+{
+ platform_driver_unregister(&tegra_das_driver);
+}
+module_exit(tegra_das_modexit);
+
+MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
+MODULE_DESCRIPTION("Tegra DAS driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * tegra_das.h - Definitions for Tegra DAS driver
+ *
+ * Author: Stephen Warren <swarren@nvidia.com>
+ * Copyright (C) 2010 - NVIDIA, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#ifndef __TEGRA_DAS_H__
+#define __TEGRA_DAS_H__
+
+/* Register TEGRA_DAS_DAP_CTRL_SEL */
+#define TEGRA_DAS_DAP_CTRL_SEL 0x00
+#define TEGRA_DAS_DAP_CTRL_SEL_COUNT 5
+#define TEGRA_DAS_DAP_CTRL_SEL_STRIDE 4
+#define TEGRA_DAS_DAP_CTRL_SEL_DAP_MS_SEL_P 31
+#define TEGRA_DAS_DAP_CTRL_SEL_DAP_MS_SEL_S 1
+#define TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA1_TX_RX_P 30
+#define TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA1_TX_RX_S 1
+#define TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA2_TX_RX_P 29
+#define TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA2_TX_RX_S 1
+#define TEGRA_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL_P 0
+#define TEGRA_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL_S 5
+
+/* Values for field TEGRA_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL */
+#define TEGRA_DAS_DAP_SEL_DAC1 0
+#define TEGRA_DAS_DAP_SEL_DAC2 1
+#define TEGRA_DAS_DAP_SEL_DAC3 2
+#define TEGRA_DAS_DAP_SEL_DAP1 16
+#define TEGRA_DAS_DAP_SEL_DAP2 17
+#define TEGRA_DAS_DAP_SEL_DAP3 18
+#define TEGRA_DAS_DAP_SEL_DAP4 19
+#define TEGRA_DAS_DAP_SEL_DAP5 20
+
+/* Register TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL */
+#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL 0x40
+#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_COUNT 3
+#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_STRIDE 4
+#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL_P 28
+#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL_S 4
+#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL_P 24
+#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL_S 4
+#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL_P 0
+#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL_S 4
+
+/*
+ * Values for:
+ * TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL
+ * TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL
+ * TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL
+ */
+#define TEGRA_DAS_DAC_SEL_DAP1 0
+#define TEGRA_DAS_DAC_SEL_DAP2 1
+#define TEGRA_DAS_DAC_SEL_DAP3 2
+#define TEGRA_DAS_DAC_SEL_DAP4 3
+#define TEGRA_DAS_DAC_SEL_DAP5 4
+
+/*
+ * Names/IDs of the DACs/DAPs.
+ */
+
+#define TEGRA_DAS_DAP_ID_1 0
+#define TEGRA_DAS_DAP_ID_2 1
+#define TEGRA_DAS_DAP_ID_3 2
+#define TEGRA_DAS_DAP_ID_4 3
+#define TEGRA_DAS_DAP_ID_5 4
+
+#define TEGRA_DAS_DAC_ID_1 0
+#define TEGRA_DAS_DAC_ID_2 1
+#define TEGRA_DAS_DAC_ID_3 2
+
+struct tegra_das {
+ struct device *dev;
+ void __iomem *regs;
+ struct dentry *debug;
+};
+
+/*
+ * Terminology:
+ * DAS: Digital audio switch (HW module controlled by this driver)
+ * DAP: Digital audio port (port/pins on Tegra device)
+ * DAC: Digital audio controller (e.g. I2S or AC97 controller elsewhere)
+ *
+ * The Tegra DAS is a mux/cross-bar which can connect each DAP to a specific
+ * DAC, or another DAP. When DAPs are connected, one must be the master and
+ * one the slave. Each DAC allows selection of a specific DAP for input, to
+ * cater for the case where N DAPs are connected to 1 DAC for broadcast
+ * output.
+ *
+ * This driver is dumb; no attempt is made to ensure that a valid routing
+ * configuration is programmed.
+ */
+
+/*
+ * Connect a DAP to to a DAC
+ * dap_id: DAP to connect: TEGRA_DAS_DAP_ID_*
+ * dac_sel: DAC to connect to: TEGRA_DAS_DAP_SEL_DAC*
+ */
+extern int tegra_das_connect_dap_to_dac(int dap_id, int dac_sel);
+
+/*
+ * Connect a DAP to to another DAP
+ * dap_id: DAP to connect: TEGRA_DAS_DAP_ID_*
+ * other_dap_sel: DAP to connect to: TEGRA_DAS_DAP_SEL_DAP*
+ * master: Is this DAP the master (1) or slave (0)
+ * sdata1rx: Is this DAP's SDATA1 pin RX (1) or TX (0)
+ * sdata2rx: Is this DAP's SDATA2 pin RX (1) or TX (0)
+ */
+extern int tegra_das_connect_dap_to_dap(int dap_id, int other_dap_sel,
+ int master, int sdata1rx,
+ int sdata2rx);
+
+/*
+ * Connect a DAC's input to a DAP
+ * (DAC outputs are selected by the DAP)
+ * dac_id: DAC ID to connect: TEGRA_DAS_DAC_ID_*
+ * dap_sel: DAP to receive input from: TEGRA_DAS_DAC_SEL_DAP*
+ */
+extern int tegra_das_connect_dac_to_dap(int dac_id, int dap_sel);
+
+#endif
projects / GitHub / LineageOS / android_kernel_samsung_universal7580.git / commitdiff