---
recipes-kernel/linux/linux-xlnx-dev.bb | 5 +
...rm-xilinx-Add-encoder-for-Digilent-boards.patch | 294 ++++++++++
...002-clk-Add-driver-for-axi_dynclk-IP-Core.patch | 601 +++++++++++++++++++++
3 files changed, 900 insertions(+)
create mode 100644
recipes-kernel/linux/linux-xlnx-dev/0001-drm-xilinx-Add-encoder-for-Digilent-boards.patch
create mode 100644
recipes-kernel/linux/linux-xlnx-dev/0002-clk-Add-driver-for-axi_dynclk-IP-Core.patch
diff --git a/recipes-kernel/linux/linux-xlnx-dev.bb
b/recipes-kernel/linux/linux-xlnx-dev.bb
index 1bfed49..a145b2a 100644
--- a/recipes-kernel/linux/linux-xlnx-dev.bb
+++ b/recipes-kernel/linux/linux-xlnx-dev.bb
@@ -9,6 +9,11 @@ SRCBRANCH = "${KBRANCH}"
# Use the SRCREV for the last tagged revision of linux-xlnx.
SRCREV ?= '${@oe.utils.conditional("PREFERRED_PROVIDER_virtual/kernel", "linux-xlnx-dev",
"${AUTOREV}", "3821a7bfdf7a4c697cac62f0157d8bf49467ea67", d)}'
+SRC_URI_append_zybo-linux-bd-zynq7 = " \
+ file://0001-drm-xilinx-Add-encoder-for-Digilent-boards.patch \
+ file://0002-clk-Add-driver-for-axi_dynclk-IP-Core.patch \
+"
+
python () {
if d.getVar("PREFERRED_PROVIDER_virtual/kernel", True) !=
"linux-xlnx-dev":
raise bb.parse.SkipPackage("Set PREFERRED_PROVIDER_virtual/kernel to
linux-xlnx-dev to enable it")
diff --git
a/recipes-kernel/linux/linux-xlnx-dev/0001-drm-xilinx-Add-encoder-for-Digilent-boards.patch
b/recipes-kernel/linux/linux-xlnx-dev/0001-drm-xilinx-Add-encoder-for-Digilent-boards.patch
new file mode 100644
index 0000000..892455a
--- /dev/null
+++
b/recipes-kernel/linux/linux-xlnx-dev/0001-drm-xilinx-Add-encoder-for-Digilent-boards.patch
@@ -0,0 +1,294 @@
+From 3d1820b308dcc9344d8e7df4a8a712632fb77b97 Mon Sep 17 00:00:00 2001
+Message-Id:
<3d1820b308dcc9344d8e7df4a8a712632fb77b97.1460291687.git.jason.wu.m...@gmail.com>
+From: Jason Wu <[email protected]>
+Date: Sun, 10 Apr 2016 13:14:13 +1000
+Subject: [LINUX] [PATCH] drm: xilinx: Add encoder for Digilent boards
+
+Add the dglnt_encoder driver that enables DRM support for the VGA and
+HDMI output ports found on many Digilent boards.
+
+Upstream-Status: Pending
+
+Signed-off-by: Sam Bobrowicz <[email protected]>
+Signed-off-by: Jason Wu <[email protected]>
+---
+github.com () linux-xlnx.git xlnx/master
+
+diff --git a/Documentation/devicetree/bindings/drm/xilinx/dglnt_encoder.txt
b/Documentation/devicetree/bindings/drm/xilinx/dglnt_encoder.txt
+new file mode 100644
+index 0000000..242b24e
+--- /dev/null
++++ b/Documentation/devicetree/bindings/drm/xilinx/dglnt_encoder.txt
+@@ -0,0 +1,23 @@
++Device-Tree bindings for Digilent DRM Encoder Slave
++
++This driver provides support for VGA and HDMI outputs on Digilent FPGA boards.
++The VGA or HDMI port must be connected to a Xilinx display pipeline via an
++axi2vid IP core.
++
++Required properties:
++ - compatible: Should be "digilent,drm-encoder".
++
++Optional properties:
++ - dglnt,edid-i2c: The I2C device connected to the DDC bus on the video
++ connector. This is used to obtain the supported resolutions
++ of an attached monitor. If not defined, then a default
++ set of resolutions is used and the display will initialize
++ to 720p. Note most VGA connectors on Digilent boards do
++ not have the DDC bus routed out.
++
++Example:
++
++ encoder_0: digilent_encoder {
++ compatible = "digilent,drm-encoder";
++ dglnt,edid-i2c = <&i2c1>;
++ };
+diff --git a/drivers/gpu/drm/xilinx/Kconfig b/drivers/gpu/drm/xilinx/Kconfig
+index a713b17..c32a4a6 100644
+--- a/drivers/gpu/drm/xilinx/Kconfig
++++ b/drivers/gpu/drm/xilinx/Kconfig
+@@ -21,3 +21,9 @@ config DRM_XILINX_DP_SUB
+ select DRM_XILINX_DP
+ help
+ DRM driver for Xilinx Display Port Subsystem.
++
++config DRM_DIGILENT_ENCODER
++ tristate "Digilent VGA/HDMI DRM Encoder Driver"
++ depends on DRM_XILINX
++ help
++ DRM slave encoder for Video-out on Digilent boards.
+diff --git a/drivers/gpu/drm/xilinx/Makefile b/drivers/gpu/drm/xilinx/Makefile
+index 705472c..a571bd9 100644
+--- a/drivers/gpu/drm/xilinx/Makefile
++++ b/drivers/gpu/drm/xilinx/Makefile
+@@ -10,3 +10,4 @@ xilinx_drm-y += xilinx_cresample.o xilinx_osd.o
xilinx_rgb2yuv.o xilinx_vtc.o
+ obj-$(CONFIG_DRM_XILINX) += xilinx_drm.o
+ obj-$(CONFIG_DRM_XILINX_DP) += xilinx_drm_dp.o
+ obj-$(CONFIG_DRM_XILINX_DP_SUB) += xilinx_drm_dp_sub.o
++obj-$(CONFIG_DRM_DIGILENT_ENCODER) += dglnt_encoder.o
+diff --git a/drivers/gpu/drm/xilinx/dglnt_encoder.c
b/drivers/gpu/drm/xilinx/dglnt_encoder.c
+new file mode 100644
+index 0000000..26a2398
+--- /dev/null
++++ b/drivers/gpu/drm/xilinx/dglnt_encoder.c
+@@ -0,0 +1,217 @@
++/*
++ * dglnt_encoder.c - DRM slave encoder for Video-out on Digilent boards
++ *
++ * Copyright (C) 2015 Digilent
++ * Author: Sam Bobrowicz <[email protected]>
++ *
++ * Based on udl_encoder.c and udl_connector.c, Copyright (C) 2012 Red Hat.
++ * Also based on xilinx_drm_dp.c, Copyright (C) 2014 Xilinx, Inc.
++ *
++ * This software is licensed under the terms of the GNU General Public
++ * License version 2, as published by the Free Software Foundation, and
++ * may be copied, distributed, and modified under those terms.
++ *
++ * 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.
++ */
++
++#include <drm/drmP.h>
++#include <drm/drm_edid.h>
++#include <drm/drm_encoder_slave.h>
++
++#include <linux/device.h>
++#include <linux/module.h>
++#include <linux/err.h>
++#include <linux/i2c.h>
++#include <linux/of.h>
++#include <linux/of_platform.h>
++#include <linux/platform_device.h>
++
++#define DGLNT_ENC_MAX_FREQ 150000
++#define DGLNT_ENC_MAX_H 1920
++#define DGLNT_ENC_MAX_V 1080
++#define DGLNT_ENC_PREF_H 1280
++#define DGLNT_ENC_PREF_V 720
++
++struct dglnt_encoder {
++ struct drm_encoder *encoder;
++ struct i2c_adapter *i2c_bus;
++ bool i2c_present;
++};
++
++static inline struct dglnt_encoder *to_dglnt_encoder(
++ struct drm_encoder *encoder)
++{
++ return to_encoder_slave(encoder)->slave_priv;
++}
++
++static bool dglnt_mode_fixup(struct drm_encoder *encoder,
++ const struct drm_display_mode *mode,
++ struct drm_display_mode *adjusted_mode)
++{
++ return true;
++}
++
++static void dglnt_encoder_mode_set(struct drm_encoder *encoder,
++ struct drm_display_mode *mode,
++ struct drm_display_mode *adjusted_mode)
++{
++}
++
++static void
++dglnt_encoder_dpms(struct drm_encoder *encoder, int mode)
++{
++}
++
++static void dglnt_encoder_save(struct drm_encoder *encoder)
++{
++}
++
++static void dglnt_encoder_restore(struct drm_encoder *encoder)
++{
++}
++
++static int dglnt_encoder_mode_valid(struct drm_encoder *encoder,
++ struct drm_display_mode *mode)
++{
++ if (mode &&
++ !(mode->flags & ((DRM_MODE_FLAG_INTERLACE |
++ DRM_MODE_FLAG_DBLCLK) | DRM_MODE_FLAG_3D_MASK)) &&
++ (mode->clock <= DGLNT_ENC_MAX_FREQ) &&
++ (mode->hdisplay <= DGLNT_ENC_MAX_H) &&
++ (mode->vdisplay <= DGLNT_ENC_MAX_V))
++ return MODE_OK;
++ return MODE_BAD;
++}
++
++static int dglnt_encoder_get_modes(struct drm_encoder *encoder,
++ struct drm_connector *connector)
++{
++ struct dglnt_encoder *dglnt = to_dglnt_encoder(encoder);
++ struct edid *edid;
++ int num_modes = 0;
++
++ if (dglnt->i2c_present) {
++ edid = drm_get_edid(connector, dglnt->i2c_bus);
++ drm_mode_connector_update_edid_property(connector, edid);
++ if (edid) {
++ num_modes = drm_add_edid_modes(connector, edid);
++ kfree(edid);
++ }
++ } else {
++ num_modes = drm_add_modes_noedid(connector, DGLNT_ENC_MAX_H,
++ DGLNT_ENC_MAX_V);
++ drm_set_preferred_mode(connector, DGLNT_ENC_PREF_H,
++ DGLNT_ENC_PREF_V);
++ }
++ return num_modes;
++}
++
++static enum drm_connector_status dglnt_encoder_detect(
++ struct drm_encoder *encoder,
++ struct drm_connector *connector)
++{
++ struct dglnt_encoder *dglnt = to_dglnt_encoder(encoder);
++
++ if (dglnt->i2c_present) {
++ if (drm_probe_ddc(dglnt->i2c_bus))
++ return connector_status_connected;
++ return connector_status_disconnected;
++ } else
++ return connector_status_unknown;
++}
++
++static struct drm_encoder_slave_funcs dglnt_encoder_slave_funcs = {
++ .dpms = dglnt_encoder_dpms,
++ .save = dglnt_encoder_save,
++ .restore = dglnt_encoder_restore,
++ .mode_fixup = dglnt_mode_fixup,
++ .mode_valid = dglnt_encoder_mode_valid,
++ .mode_set = dglnt_encoder_mode_set,
++ .detect = dglnt_encoder_detect,
++ .get_modes = dglnt_encoder_get_modes,
++};
++
++static int dglnt_encoder_encoder_init(struct platform_device *pdev,
++ struct drm_device *dev,
++ struct drm_encoder_slave *encoder)
++{
++ struct dglnt_encoder *dglnt = platform_get_drvdata(pdev);
++ struct device_node *sub_node;
++
++ encoder->slave_priv = dglnt;
++ encoder->slave_funcs = &dglnt_encoder_slave_funcs;
++
++ dglnt->encoder = &encoder->base;
++
++ /* get i2c adapter for edid */
++ dglnt->i2c_present = false;
++ sub_node = of_parse_phandle(pdev->dev.of_node, "dglnt,edid-i2c", 0);
++ if (sub_node) {
++ dglnt->i2c_bus = of_find_i2c_adapter_by_node(sub_node);
++ if (!dglnt->i2c_bus)
++ DRM_INFO("failed to get the edid i2c adapter, using default
modes\n");
++ else
++ dglnt->i2c_present = true;
++ of_node_put(sub_node);
++ }
++
++ return 0;
++}
++
++static int dglnt_encoder_probe(struct platform_device *pdev)
++{
++ struct dglnt_encoder *dglnt;
++
++ dglnt = devm_kzalloc(&pdev->dev, sizeof(*dglnt), GFP_KERNEL);
++ if (!dglnt)
++ return -ENOMEM;
++
++ platform_set_drvdata(pdev, dglnt);
++
++ return 0;
++}
++
++static int dglnt_encoder_remove(struct platform_device *pdev)
++{
++ return 0;
++}
++
++static const struct of_device_id dglnt_encoder_of_match[] = {
++ { .compatible = "digilent,drm-encoder", },
++ { /* end of table */ },
++};
++MODULE_DEVICE_TABLE(of, dglnt_encoder_of_match);
++
++static struct drm_platform_encoder_driver dglnt_encoder_driver = {
++ .platform_driver = {
++ .probe = dglnt_encoder_probe,
++ .remove = dglnt_encoder_remove,
++ .driver = {
++ .owner = THIS_MODULE,
++ .name = "dglnt-drm-enc",
++ .of_match_table = dglnt_encoder_of_match,
++ },
++ },
++
++ .encoder_init = dglnt_encoder_encoder_init,
++};
++
++static int __init dglnt_encoder_init(void)
++{
++ return platform_driver_register(&dglnt_encoder_driver.platform_driver);
++}
++
++static void __exit dglnt_encoder_exit(void)
++{
++ platform_driver_unregister(&dglnt_encoder_driver.platform_driver);
++}
++
++module_init(dglnt_encoder_init);
++module_exit(dglnt_encoder_exit);
++
++MODULE_AUTHOR("Digilent, Inc.");
++MODULE_DESCRIPTION("DRM slave encoder for Video-out on Digilent boards");
++MODULE_LICENSE("GPL v2");
+--
+1.9.1
+
diff --git
a/recipes-kernel/linux/linux-xlnx-dev/0002-clk-Add-driver-for-axi_dynclk-IP-Core.patch
b/recipes-kernel/linux/linux-xlnx-dev/0002-clk-Add-driver-for-axi_dynclk-IP-Core.patch
new file mode 100644
index 0000000..b508fc2
--- /dev/null
+++
b/recipes-kernel/linux/linux-xlnx-dev/0002-clk-Add-driver-for-axi_dynclk-IP-Core.patch
@@ -0,0 +1,601 @@
+From e3b9c3186bbdf9cd5d084c62ecd232b57a316d3f Mon Sep 17 00:00:00 2001
+From: Jason Wu <[email protected]>
+Date: Sun, 10 Apr 2016 13:16:06 +1000
+Subject: [PATCH] clk: Add driver for axi_dynclk IP Core
+
+Add support for the axi_dynclk IP Core available from Digilent. This IP
+core dynamically configures the clock resources inside a Xilinx FPGA to
+generate a clock with a software programmable frequency.
+
+Upstream-Status: Pending
+
+Signed-off-by: Sam Bobrowicz <[email protected]>
+Signed-off-by: Jason Wu <[email protected]>
+
+diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
+index c3e3a02..29dfd15 100644
+--- a/drivers/clk/Kconfig
++++ b/drivers/clk/Kconfig
+@@ -147,6 +147,14 @@ config CLK_QORIQ
+ This adds the clock driver support for Freescale QorIQ platforms
+ using common clock framework.
+
++config COMMON_CLK_DGLNT_DYNCLK
++ tristate "Digilent axi_dynclk Driver"
++ depends on ARCH_ZYNQ || MICROBLAZE
++ help
++ ---help---
++ Support for the Digilent AXI Dynamic Clock core for Xilinx
++ FPGAs.
++
+ config COMMON_CLK_XGENE
+ bool "Clock driver for APM XGene SoC"
+ default y
+diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
+index 820714c..9043f45 100644
+--- a/drivers/clk/Makefile
++++ b/drivers/clk/Makefile
+@@ -22,6 +22,7 @@ obj-$(CONFIG_COMMON_CLK_AXI_CLKGEN) += clk-axi-clkgen.o
+ obj-$(CONFIG_ARCH_AXXIA) += clk-axm5516.o
+ obj-$(CONFIG_COMMON_CLK_CDCE706) += clk-cdce706.o
+ obj-$(CONFIG_ARCH_CLPS711X) += clk-clps711x.o
++obj-$(CONFIG_COMMON_CLK_DGLNT_DYNCLK) += clk-dglnt-dynclk.o
+ obj-$(CONFIG_ARCH_EFM32) += clk-efm32gg.o
+ obj-$(CONFIG_ARCH_HIGHBANK) += clk-highbank.o
+ obj-$(CONFIG_MACH_LOONGSON32) += clk-ls1x.o
+diff --git a/drivers/clk/clk-dglnt-dynclk.c b/drivers/clk/clk-dglnt-dynclk.c
+new file mode 100644
+index 0000000..496ad5f
+--- /dev/null
++++ b/drivers/clk/clk-dglnt-dynclk.c
+@@ -0,0 +1,547 @@
++/*
++ * clk-dglnt-dynclk.c - Digilent AXI Dynamic Clock (axi_dynclk) Driver
++ *
++ * Copyright (C) 2015 Digilent
++ * Author: Sam Bobrowicz <[email protected]>
++ *
++ * Reused code from clk-axi-clkgen.c, Copyright (C) 2012-2013 Analog Devices
Inc.
++ *
++ * This software is licensed under the terms of the GNU General Public
++ * License version 2, as published by the Free Software Foundation, and
++ * may be copied, distributed, and modified under those terms.
++ *
++ * 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.
++ */
++
++#include <linux/platform_device.h>
++#include <linux/clk-provider.h>
++#include <linux/clk.h>
++#include <linux/slab.h>
++#include <linux/io.h>
++#include <linux/of.h>
++#include <linux/module.h>
++#include <linux/err.h>
++#include <linux/kernel.h>
++
++#define CLK_BIT_WEDGE 13
++#define CLK_BIT_NOCOUNT 12
++
++/* This value is used to signal an error */
++#define ERR_CLKCOUNTCALC 0xFFFFFFFF
++#define ERR_CLKDIVIDER (1 << CLK_BIT_WEDGE | 1 << CLK_BIT_NOCOUNT)
++
++#define DYNCLK_DIV_1_REGMASK 0x1041
++/* 25 MHz (125 KHz / 5) */
++#define DYNCLK_DEFAULT_FREQ 125000
++
++#define MMCM_FREQ_VCOMIN 600000
++#define MMCM_FREQ_VCOMAX 1200000
++#define MMCM_FREQ_PFDMIN 10000
++#define MMCM_FREQ_PFDMAX 450000
++#define MMCM_FREQ_OUTMIN 4000
++#define MMCM_FREQ_OUTMAX 800000
++#define MMCM_DIV_MAX 106
++#define MMCM_FB_MIN 2
++#define MMCM_FB_MAX 64
++#define MMCM_CLKDIV_MAX 128
++#define MMCM_CLKDIV_MIN 1
++
++#define OFST_DISPLAY_CTRL 0x0
++#define OFST_DISPLAY_STATUS 0x4
++#define OFST_DISPLAY_CLK_L 0x8
++#define OFST_DISPLAY_FB_L 0x0C
++#define OFST_DISPLAY_FB_H_CLK_H 0x10
++#define OFST_DISPLAY_DIV 0x14
++#define OFST_DISPLAY_LOCK_L 0x18
++#define OFST_DISPLAY_FLTR_LOCK_H 0x1C
++
++static const u64 lock_lookup[64] = {
++ 0b0011000110111110100011111010010000000001,
++ 0b0011000110111110100011111010010000000001,
++ 0b0100001000111110100011111010010000000001,
++ 0b0101101011111110100011111010010000000001,
++ 0b0111001110111110100011111010010000000001,
++ 0b1000110001111110100011111010010000000001,
++ 0b1001110011111110100011111010010000000001,
++ 0b1011010110111110100011111010010000000001,
++ 0b1100111001111110100011111010010000000001,
++ 0b1110011100111110100011111010010000000001,
++ 0b1111111111111000010011111010010000000001,
++ 0b1111111111110011100111111010010000000001,
++ 0b1111111111101110111011111010010000000001,
++ 0b1111111111101011110011111010010000000001,
++ 0b1111111111101000101011111010010000000001,
++ 0b1111111111100111000111111010010000000001,
++ 0b1111111111100011111111111010010000000001,
++ 0b1111111111100010011011111010010000000001,
++ 0b1111111111100000110111111010010000000001,
++ 0b1111111111011111010011111010010000000001,
++ 0b1111111111011101101111111010010000000001,
++ 0b1111111111011100001011111010010000000001,
++ 0b1111111111011010100111111010010000000001,
++ 0b1111111111011001000011111010010000000001,
++ 0b1111111111011001000011111010010000000001,
++ 0b1111111111010111011111111010010000000001,
++ 0b1111111111010101111011111010010000000001,
++ 0b1111111111010101111011111010010000000001,
++ 0b1111111111010100010111111010010000000001,
++ 0b1111111111010100010111111010010000000001,
++ 0b1111111111010010110011111010010000000001,
++ 0b1111111111010010110011111010010000000001,
++ 0b1111111111010010110011111010010000000001,
++ 0b1111111111010001001111111010010000000001,
++ 0b1111111111010001001111111010010000000001,
++ 0b1111111111010001001111111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001,
++ 0b1111111111001111101011111010010000000001
++};
++
++static const u32 filter_lookup_low[64] = {
++ 0b0001011111,
++ 0b0001010111,
++ 0b0001111011,
++ 0b0001011011,
++ 0b0001101011,
++ 0b0001110011,
++ 0b0001110011,
++ 0b0001110011,
++ 0b0001110011,
++ 0b0001001011,
++ 0b0001001011,
++ 0b0001001011,
++ 0b0010110011,
++ 0b0001010011,
++ 0b0001010011,
++ 0b0001010011,
++ 0b0001010011,
++ 0b0001010011,
++ 0b0001010011,
++ 0b0001010011,
++ 0b0001010011,
++ 0b0001010011,
++ 0b0001010011,
++ 0b0001100011,
++ 0b0001100011,
++ 0b0001100011,
++ 0b0001100011,
++ 0b0001100011,
++ 0b0001100011,
++ 0b0001100011,
++ 0b0001100011,
++ 0b0001100011,
++ 0b0001100011,
++ 0b0001100011,
++ 0b0001100011,
++ 0b0001100011,
++ 0b0001100011,
++ 0b0010010011,
++ 0b0010010011,
++ 0b0010010011,
++ 0b0010010011,
++ 0b0010010011,
++ 0b0010010011,
++ 0b0010010011,
++ 0b0010010011,
++ 0b0010010011,
++ 0b0010010011,
++ 0b0010100011,
++ 0b0010100011,
++ 0b0010100011,
++ 0b0010100011,
++ 0b0010100011,
++ 0b0010100011,
++ 0b0010100011,
++ 0b0010100011,
++ 0b0010100011,
++ 0b0010100011,
++ 0b0010100011,
++ 0b0010100011,
++ 0b0010100011,
++ 0b0010100011,
++ 0b0010100011,
++ 0b0010100011,
++ 0b0010100011
++};
++
++struct dglnt_dynclk_reg;
++struct dglnt_dynclk_mode;
++struct dglnt_dynclk;
++
++struct dglnt_dynclk_reg {
++ u32 clk0L;
++ u32 clkFBL;
++ u32 clkFBH_clk0H;
++ u32 divclk;
++ u32 lockL;
++ u32 fltr_lockH;
++};
++
++struct dglnt_dynclk_mode {
++ u32 freq;
++ u32 fbmult;
++ u32 clkdiv;
++ u32 maindiv;
++};
++
++struct dglnt_dynclk {
++ void __iomem *base;
++ struct clk_hw clk_hw;
++ unsigned long freq;
++};
++
++u32 dglnt_dynclk_divider(u32 divide)
++{
++ u32 output = 0;
++ u32 highTime = 0;
++ u32 lowTime = 0;
++
++ if ((divide < 1) || (divide > 128))
++ return ERR_CLKDIVIDER;
++
++ if (divide == 1)
++ return DYNCLK_DIV_1_REGMASK;
++
++ highTime = divide / 2;
++ /* if divide is odd */
++ if (divide & 0x1) {
++ lowTime = highTime + 1;
++ output = 1 << CLK_BIT_WEDGE;
++ } else {
++ lowTime = highTime;
++ }
++
++ output |= 0x03F & lowTime;
++ output |= 0xFC0 & (highTime << 6);
++ return output;
++}
++
++u32 dglnt_dynclk_count_calc(u32 divide)
++{
++ u32 output = 0;
++ u32 divCalc = 0;
++
++ divCalc = dglnt_dynclk_divider(divide);
++ if (divCalc == ERR_CLKDIVIDER)
++ output = ERR_CLKCOUNTCALC;
++ else
++ output = (0xFFF & divCalc) | ((divCalc << 10) & 0x00C00000);
++ return output;
++}
++
++
++int dglnt_dynclk_find_reg(struct dglnt_dynclk_reg *regValues,
++ struct dglnt_dynclk_mode *clkParams)
++{
++ if ((clkParams->fbmult < 2) || clkParams->fbmult > 64)
++ return -EINVAL;
++
++ regValues->clk0L = dglnt_dynclk_count_calc(clkParams->clkdiv);
++ if (regValues->clk0L == ERR_CLKCOUNTCALC)
++ return -EINVAL;
++
++ regValues->clkFBL = dglnt_dynclk_count_calc(clkParams->fbmult);
++ if (regValues->clkFBL == ERR_CLKCOUNTCALC)
++ return -EINVAL;
++
++ regValues->clkFBH_clk0H = 0;
++
++ regValues->divclk = dglnt_dynclk_divider(clkParams->maindiv);
++ if (regValues->divclk == ERR_CLKDIVIDER)
++ return -EINVAL;
++
++ regValues->lockL = (u32)(lock_lookup[clkParams->fbmult - 1] &
++ 0xFFFFFFFF);
++
++ regValues->fltr_lockH = (u32)((lock_lookup[clkParams->fbmult - 1] >>
++ 32) & 0x000000FF);
++ regValues->fltr_lockH |= ((filter_lookup_low[clkParams->fbmult - 1] <<
++ 16) & 0x03FF0000);
++
++ return 0;
++}
++
++void dglnt_dynclk_write_reg(struct dglnt_dynclk_reg *regValues,
++ void __iomem *baseaddr)
++{
++ writel(regValues->clk0L, baseaddr + OFST_DISPLAY_CLK_L);
++ writel(regValues->clkFBL, baseaddr + OFST_DISPLAY_FB_L);
++ writel(regValues->clkFBH_clk0H, baseaddr + OFST_DISPLAY_FB_H_CLK_H);
++ writel(regValues->divclk, baseaddr + OFST_DISPLAY_DIV);
++ writel(regValues->lockL, baseaddr + OFST_DISPLAY_LOCK_L);
++ writel(regValues->fltr_lockH, baseaddr + OFST_DISPLAY_FLTR_LOCK_H);
++}
++
++u32 dglnt_dynclk_find_mode(u32 freq, u32 parentFreq,
++ struct dglnt_dynclk_mode *bestPick)
++{
++ u32 bestError = MMCM_FREQ_OUTMAX;
++ u32 curError;
++ u32 curClkMult;
++ u32 curFreq;
++ u32 divVal;
++ u32 curFb, curClkDiv;
++ u32 minFb = 0;
++ u32 maxFb = 0;
++ u32 curDiv = 1;
++ u32 maxDiv;
++ bool freq_found = false;
++
++ bestPick->freq = 0;
++ if (parentFreq == 0)
++ return 0;
++
++ /* minimum frequency is actually dictated by VCOmin */
++ if (freq < MMCM_FREQ_OUTMIN)
++ freq = MMCM_FREQ_OUTMIN;
++ if (freq > MMCM_FREQ_OUTMAX)
++ freq = MMCM_FREQ_OUTMAX;
++
++ if (parentFreq > MMCM_FREQ_PFDMAX)
++ curDiv = 2;
++ maxDiv = parentFreq / MMCM_FREQ_PFDMIN;
++ if (maxDiv > MMCM_DIV_MAX)
++ maxDiv = MMCM_DIV_MAX;
++
++ while (curDiv <= maxDiv && !freq_found) {
++ minFb = curDiv * DIV_ROUND_UP(MMCM_FREQ_VCOMIN, parentFreq);
++ maxFb = curDiv * (MMCM_FREQ_VCOMAX / parentFreq);
++ if (maxFb > MMCM_FB_MAX)
++ maxFb = MMCM_FB_MAX;
++ if (minFb < MMCM_FB_MIN)
++ minFb = MMCM_FB_MIN;
++
++ divVal = curDiv * freq;
++ /*
++ * This multiplier is used to find the best clkDiv value for
++ * each FB value
++ */
++ curClkMult = ((parentFreq * 1000) + (divVal / 2)) / divVal;
++
++ curFb = minFb;
++ while (curFb <= maxFb && !freq_found) {
++ curClkDiv = ((curClkMult * curFb) + 500) / 1000;
++ if (curClkDiv > MMCM_CLKDIV_MAX)
++ curClkDiv = MMCM_CLKDIV_MAX;
++ if (curClkDiv < MMCM_CLKDIV_MIN)
++ curClkDiv = MMCM_CLKDIV_MIN;
++ curFreq = (((parentFreq * curFb) / curDiv) / curClkDiv);
++ if (curFreq >= freq)
++ curError = curFreq - freq;
++ else
++ curError = freq - curFreq;
++ if (curError < bestError) {
++ bestError = curError;
++ bestPick->clkdiv = curClkDiv;
++ bestPick->fbmult = curFb;
++ bestPick->maindiv = curDiv;
++ bestPick->freq = curFreq;
++ }
++ if (!curError)
++ freq_found = true;
++ curFb++;
++ }
++ curDiv++;
++ }
++ return bestPick->freq;
++}
++
++static struct dglnt_dynclk *clk_hw_to_dglnt_dynclk(struct clk_hw *clk_hw)
++{
++ return container_of(clk_hw, struct dglnt_dynclk, clk_hw);
++}
++
++
++static int dglnt_dynclk_enable(struct clk_hw *clk_hw)
++{
++ struct dglnt_dynclk *dglnt_dynclk = clk_hw_to_dglnt_dynclk(clk_hw);
++ unsigned int clock_state;
++
++ if (dglnt_dynclk->freq) {
++ writel(1, dglnt_dynclk->base + OFST_DISPLAY_CTRL);
++ do {
++ clock_state = readl(dglnt_dynclk->base +
++ OFST_DISPLAY_STATUS);
++ } while (!clock_state);
++ }
++ return 0;
++}
++
++static void dglnt_dynclk_disable(struct clk_hw *clk_hw)
++{
++ struct dglnt_dynclk *dglnt_dynclk = clk_hw_to_dglnt_dynclk(clk_hw);
++
++ writel(0, dglnt_dynclk->base + OFST_DISPLAY_CTRL);
++}
++
++static int dglnt_dynclk_set_rate(struct clk_hw *clk_hw,
++ unsigned long rate, unsigned long parent_rate)
++{
++ struct dglnt_dynclk *dglnt_dynclk = clk_hw_to_dglnt_dynclk(clk_hw);
++ struct dglnt_dynclk_reg clkReg;
++ struct dglnt_dynclk_mode clkMode;
++
++ if (parent_rate == 0 || rate == 0)
++ return -EINVAL;
++ if (rate == dglnt_dynclk->freq)
++ return 0;
++
++ /*
++ * Convert from Hz to KHz, then multiply by five to account for
++ * BUFR division
++ */
++ rate = (rate + 100) / 200;
++ /* convert from Hz to KHz */
++ parent_rate = (parent_rate + 500) / 1000;
++ if (!dglnt_dynclk_find_mode(rate, parent_rate, &clkMode))
++ return -EINVAL;
++
++ /*
++ * Write to the PLL dynamic configuration registers to configure it
++ * with the calculated parameters.
++ */
++ dglnt_dynclk_find_reg(&clkReg, &clkMode);
++ dglnt_dynclk_write_reg(&clkReg, dglnt_dynclk->base);
++ dglnt_dynclk->freq = clkMode.freq * 200;
++ dglnt_dynclk_disable(clk_hw);
++ dglnt_dynclk_enable(clk_hw);
++
++ return 0;
++}
++
++static long dglnt_dynclk_round_rate(struct clk_hw *hw, unsigned long rate,
++ unsigned long *parent_rate)
++{
++ struct dglnt_dynclk_mode clkMode;
++
++ dglnt_dynclk_find_mode(((rate + 100) / 200),
++ ((*parent_rate) + 500) / 1000, &clkMode);
++
++ return (clkMode.freq * 200);
++}
++
++static unsigned long dglnt_dynclk_recalc_rate(struct clk_hw *clk_hw,
++ unsigned long parent_rate)
++{
++ struct dglnt_dynclk *dglnt_dynclk = clk_hw_to_dglnt_dynclk(clk_hw);
++
++ return dglnt_dynclk->freq;
++}
++
++
++static const struct clk_ops dglnt_dynclk_ops = {
++ .recalc_rate = dglnt_dynclk_recalc_rate,
++ .round_rate = dglnt_dynclk_round_rate,
++ .set_rate = dglnt_dynclk_set_rate,
++ .enable = dglnt_dynclk_enable,
++ .disable = dglnt_dynclk_disable,
++};
++
++static const struct of_device_id dglnt_dynclk_ids[] = {
++ { .compatible = "digilent,axi-dynclk", },
++ { },
++};
++MODULE_DEVICE_TABLE(of, dglnt_dynclk_ids);
++
++static int dglnt_dynclk_probe(struct platform_device *pdev)
++{
++ const struct of_device_id *id;
++ struct dglnt_dynclk *dglnt_dynclk;
++ struct clk_init_data init;
++ const char *parent_name;
++ const char *clk_name;
++ struct resource *mem;
++ struct clk *clk;
++
++ if (!pdev->dev.of_node)
++ return -ENODEV;
++
++ id = of_match_node(dglnt_dynclk_ids, pdev->dev.of_node);
++ if (!id)
++ return -ENODEV;
++
++ dglnt_dynclk = devm_kzalloc(&pdev->dev, sizeof(*dglnt_dynclk),
++ GFP_KERNEL);
++ if (!dglnt_dynclk)
++ return -ENOMEM;
++
++ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ dglnt_dynclk->base = devm_ioremap_resource(&pdev->dev, mem);
++ if (IS_ERR(dglnt_dynclk->base))
++ return PTR_ERR(dglnt_dynclk->base);
++
++ parent_name = of_clk_get_parent_name(pdev->dev.of_node, 0);
++ if (!parent_name)
++ return -EINVAL;
++
++ clk_name = pdev->dev.of_node->name;
++ of_property_read_string(pdev->dev.of_node, "clock-output-names",
++ &clk_name);
++
++ init.name = clk_name;
++ init.ops = &dglnt_dynclk_ops;
++ init.flags = 0;
++ init.parent_names = &parent_name;
++ init.num_parents = 1;
++
++ dglnt_dynclk->freq = 0;
++ dglnt_dynclk_disable(&dglnt_dynclk->clk_hw);
++
++ dglnt_dynclk->clk_hw.init = &init;
++ clk = devm_clk_register(&pdev->dev, &dglnt_dynclk->clk_hw);
++ if (IS_ERR(clk))
++ return PTR_ERR(clk);
++
++ return of_clk_add_provider(pdev->dev.of_node, of_clk_src_simple_get,
++ clk);
++}
++
++static int dglnt_dynclk_remove(struct platform_device *pdev)
++{
++ of_clk_del_provider(pdev->dev.of_node);
++
++ return 0;
++}
++
++static struct platform_driver dglnt_dynclk_driver = {
++ .driver = {
++ .name = "dglnt-dynclk",
++ .owner = THIS_MODULE,
++ .of_match_table = dglnt_dynclk_ids,
++ },
++ .probe = dglnt_dynclk_probe,
++ .remove = dglnt_dynclk_remove,
++};
++module_platform_driver(dglnt_dynclk_driver);
++
++MODULE_LICENSE("GPL v2");
++MODULE_AUTHOR("Sam Bobrowicz <[email protected]>");
++MODULE_DESCRIPTION("CCF Driver for Digilent axi_dynclk IP Core");
+--
+1.9.1
+
--
1.9.1
--
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