--- /dev/null
+/*
+ * Copyright (C) 2011 Freescale Semiconductor, Inc.
+ *
+ * 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/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+
+#include <linux/platform_device.h>
+#include <linux/regulator/machine.h>
+#include <asm/mach-types.h>
+
+#include <mach/mxc_hdmi.h>
+#include <linux/mfd/mxc-hdmi-core.h>
+
+struct mxc_hdmi_data {
+ struct clk *isfr_clk;
+ struct platform_device *pdev;
+ unsigned long __iomem *reg_base;
+ unsigned long reg_phys_base;
+ struct device *dev;
+};
+
+static unsigned long hdmi_base;
+
+int mxc_hdmi_pixel_clk;
+int mxc_hdmi_ratio;
+
+u8 hdmi_readb(unsigned int reg)
+{
+ u8 value;
+
+ value = __raw_readb(hdmi_base + reg);
+
+ pr_debug("hdmi rd: 0x%04x = 0x%02x\n", reg, value);
+
+ return value;
+}
+
+void hdmi_writeb(u8 value, unsigned int reg)
+{
+ pr_debug("hdmi wr: 0x%04x = 0x%02x\n", reg, value);
+ __raw_writeb(value, hdmi_base + reg);
+}
+
+void hdmi_mask_writeb(u8 data, unsigned int reg, u8 shift, u8 mask)
+{
+ u8 value = hdmi_readb(reg) & ~mask;
+ value |= (data << shift) & mask;
+ hdmi_writeb(value, reg);
+}
+
+unsigned int hdmi_read4(unsigned int reg)
+{
+ /* read a four byte address from registers */
+ return (hdmi_readb(reg + 3) << 24) |
+ (hdmi_readb(reg + 2) << 16) |
+ (hdmi_readb(reg + 1) << 8) |
+ hdmi_readb(reg);
+}
+
+void hdmi_write4(unsigned int value, unsigned int reg)
+{
+ /* write a four byte address to hdmi regs */
+ hdmi_writeb(value & 0xff, reg);
+ hdmi_writeb((value >> 8) & 0xff, reg + 1);
+ hdmi_writeb((value >> 16) & 0xff, reg + 2);
+ hdmi_writeb((value >> 24) & 0xff, reg + 3);
+}
+
+static void initialize_hdmi_ih_mutes(void)
+{
+ u8 ih_mute;
+
+ /*
+ * Boot up defaults are:
+ * HDMI_IH_MUTE = 0x03 (disabled)
+ * HDMI_IH_MUTE_* = 0x00 (enabled)
+ */
+
+ /* Disable top level interrupt bits in HDMI block */
+ ih_mute = hdmi_readb(HDMI_IH_MUTE) |
+ HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT |
+ HDMI_IH_MUTE_MUTE_ALL_INTERRUPT;
+
+ hdmi_writeb(ih_mute, HDMI_IH_MUTE);
+
+ /* Disable interrupts in the IH_MUTE_* registers */
+ hdmi_writeb(0xff, HDMI_IH_MUTE_FC_STAT0);
+ hdmi_writeb(0xff, HDMI_IH_MUTE_FC_STAT1);
+ hdmi_writeb(0xff, HDMI_IH_MUTE_FC_STAT2);
+ hdmi_writeb(0xff, HDMI_IH_MUTE_AS_STAT0);
+ hdmi_writeb(0xff, HDMI_IH_MUTE_PHY_STAT0);
+ hdmi_writeb(0xff, HDMI_IH_MUTE_I2CM_STAT0);
+ hdmi_writeb(0xff, HDMI_IH_MUTE_CEC_STAT0);
+ hdmi_writeb(0xff, HDMI_IH_MUTE_VP_STAT0);
+ hdmi_writeb(0xff, HDMI_IH_MUTE_I2CMPHY_STAT0);
+ hdmi_writeb(0xff, HDMI_IH_MUTE_AHBDMAAUD_STAT0);
+
+ /* Enable top level interrupt bits in HDMI block */
+ ih_mute &= ~(HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT |
+ HDMI_IH_MUTE_MUTE_ALL_INTERRUPT);
+ hdmi_writeb(ih_mute, HDMI_IH_MUTE);
+}
+
+static int mxc_hdmi_core_probe(struct platform_device *pdev)
+{
+ struct mxc_hdmi_data *hdmi_data;
+ struct resource *res;
+ int ret = 0;
+
+ /* 100% for 8 bit pixels */
+ mxc_hdmi_ratio = 100;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENOENT;
+
+ hdmi_data = kzalloc(sizeof(struct mxc_hdmi_data), GFP_KERNEL);
+ if (!hdmi_data) {
+ dev_err(&pdev->dev, "Couldn't allocate mxc hdmi mfd device\n");
+ return -ENOMEM;
+ }
+ hdmi_data->pdev = pdev;
+
+ hdmi_data->isfr_clk = clk_get(&hdmi_data->pdev->dev, "hdmi_isfr_clk");
+ if (IS_ERR(hdmi_data->isfr_clk)) {
+ ret = PTR_ERR(hdmi_data->isfr_clk);
+ dev_err(&hdmi_data->pdev->dev,
+ "Unable to get HDMI isfr clk: %d\n", ret);
+ goto eclkg;
+ }
+
+ ret = clk_enable(hdmi_data->isfr_clk);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Cannot enable HDMI clock: %d\n", ret);
+ goto eclke;
+ }
+
+ pr_debug("%s isfr_clk:%d\n", __func__,
+ (int)clk_get_rate(hdmi_data->isfr_clk));
+
+ hdmi_data->reg_phys_base = res->start;
+ if (!request_mem_region(res->start, resource_size(res),
+ dev_name(&pdev->dev))) {
+ dev_err(&pdev->dev, "request_mem_region failed\n");
+ ret = -EBUSY;
+ goto emem;
+ }
+
+ hdmi_data->reg_base = ioremap(res->start, resource_size(res));
+ if (!hdmi_data->reg_base) {
+ dev_err(&pdev->dev, "ioremap failed\n");
+ ret = -ENOMEM;
+ goto eirq;
+ }
+ hdmi_base = (unsigned long)hdmi_data->reg_base;
+
+ pr_debug("\n%s hdmi hw base = 0x%08x\n\n", __func__, (int)res->start);
+
+ initialize_hdmi_ih_mutes();
+
+ /* Replace platform data coming in with a local struct */
+ platform_set_drvdata(pdev, hdmi_data);
+
+ return ret;
+
+eirq:
+ release_mem_region(res->start, resource_size(res));
+emem:
+ clk_disable(hdmi_data->isfr_clk);
+eclke:
+ clk_put(hdmi_data->isfr_clk);
+eclkg:
+ kfree(hdmi_data);
+ return ret;
+}
+
+
+static int __exit mxc_hdmi_core_remove(struct platform_device *pdev)
+{
+ struct mxc_hdmi_data *hdmi_data = platform_get_drvdata(pdev);
+ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ iounmap(hdmi_data->reg_base);
+ release_mem_region(res->start, resource_size(res));
+
+ kfree(hdmi_data);
+
+ return 0;
+}
+
+static struct platform_driver mxc_hdmi_core_driver = {
+ .driver = {
+ .name = "mxc_hdmi_core",
+ .owner = THIS_MODULE,
+ },
+ .remove = __exit_p(mxc_hdmi_core_remove),
+};
+
+static int __init mxc_hdmi_core_init(void)
+{
+ return platform_driver_probe(&mxc_hdmi_core_driver,
+ mxc_hdmi_core_probe);
+}
+
+static void __exit mxc_hdmi_core_exit(void)
+{
+ platform_driver_unregister(&mxc_hdmi_core_driver);
+}
+
+subsys_initcall(mxc_hdmi_core_init);
+module_exit(mxc_hdmi_core_exit);
+
+MODULE_DESCRIPTION("Core driver for Freescale i.Mx on-chip HDMI");
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * 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_MXC_HDMI_CORE_H_
+#define __LINUX_MXC_HDMI_CORE_H_
+
+u8 hdmi_readb(unsigned int reg);
+void hdmi_writeb(u8 value, unsigned int reg);
+void hdmi_mask_writeb(u8 data, unsigned int addr, u8 shift, u8 mask);
+unsigned int hdmi_read4(unsigned int reg);
+void hdmi_write4(unsigned int value, unsigned int reg);
+
+extern int mxc_hdmi_pixel_clk;
+extern int mxc_hdmi_ratio;
+
+#endif
projects / karo-tx-linux.git / commitdiff