[PATCH 03/10] drm/ast: Move Gen6+ POST code to separate source file

Thomas Zimmermann tzimmermann at suse.de
Wed Jul 2 13:12:51 UTC 2025


Move POST code for Gen6+ to separate source file and hide it in
ast_2500_post(). With P2A configuration, it performs a full board
POST; otherwise it enables the transmitter chip. No changes to the
overall logic.

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
---
 drivers/gpu/drm/ast/Makefile          |   1 +
 drivers/gpu/drm/ast/ast_2500.c        | 567 ++++++++++++++++++++++++++
 drivers/gpu/drm/ast/ast_dram_tables.h |  62 ---
 drivers/gpu/drm/ast/ast_drv.c         |   2 +-
 drivers/gpu/drm/ast/ast_drv.h         |   5 +-
 drivers/gpu/drm/ast/ast_post.c        | 461 +--------------------
 6 files changed, 576 insertions(+), 522 deletions(-)
 create mode 100644 drivers/gpu/drm/ast/ast_2500.c

diff --git a/drivers/gpu/drm/ast/Makefile b/drivers/gpu/drm/ast/Makefile
index 0f09e0fa741b..38374720e32e 100644
--- a/drivers/gpu/drm/ast/Makefile
+++ b/drivers/gpu/drm/ast/Makefile
@@ -4,6 +4,7 @@
 # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
 
 ast-y := \
+	ast_2500.o \
 	ast_2600.o \
 	ast_cursor.o \
 	ast_ddc.o \
diff --git a/drivers/gpu/drm/ast/ast_2500.c b/drivers/gpu/drm/ast/ast_2500.c
new file mode 100644
index 000000000000..e5b3e0c63222
--- /dev/null
+++ b/drivers/gpu/drm/ast/ast_2500.c
@@ -0,0 +1,567 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ */
+/*
+ * Authors: Dave Airlie <airlied at redhat.com>
+ */
+
+#include <linux/delay.h>
+
+#include <drm/drm_print.h>
+
+#include "ast_drv.h"
+#include "ast_post.h"
+
+/*
+ * POST
+ */
+
+/*
+ * AST2500 DRAM settings modules
+ */
+
+#define REGTBL_NUM           17
+#define REGIDX_010           0
+#define REGIDX_014           1
+#define REGIDX_018           2
+#define REGIDX_020           3
+#define REGIDX_024           4
+#define REGIDX_02C           5
+#define REGIDX_030           6
+#define REGIDX_214           7
+#define REGIDX_2E0           8
+#define REGIDX_2E4           9
+#define REGIDX_2E8           10
+#define REGIDX_2EC           11
+#define REGIDX_2F0           12
+#define REGIDX_2F4           13
+#define REGIDX_2F8           14
+#define REGIDX_RFC           15
+#define REGIDX_PLL           16
+
+static const u32 ast2500_ddr3_1600_timing_table[REGTBL_NUM] = {
+	0x64604D38,		     /* 0x010 */
+	0x29690599,		     /* 0x014 */
+	0x00000300,		     /* 0x018 */
+	0x00000000,		     /* 0x020 */
+	0x00000000,		     /* 0x024 */
+	0x02181E70,		     /* 0x02C */
+	0x00000040,		     /* 0x030 */
+	0x00000024,		     /* 0x214 */
+	0x02001300,		     /* 0x2E0 */
+	0x0E0000A0,		     /* 0x2E4 */
+	0x000E001B,		     /* 0x2E8 */
+	0x35B8C105,		     /* 0x2EC */
+	0x08090408,		     /* 0x2F0 */
+	0x9B000800,		     /* 0x2F4 */
+	0x0E400A00,		     /* 0x2F8 */
+	0x9971452F,		     /* tRFC  */
+	0x000071C1		     /* PLL   */
+};
+
+static const u32 ast2500_ddr4_1600_timing_table[REGTBL_NUM] = {
+	0x63604E37,		     /* 0x010 */
+	0xE97AFA99,		     /* 0x014 */
+	0x00019000,		     /* 0x018 */
+	0x08000000,		     /* 0x020 */
+	0x00000400,		     /* 0x024 */
+	0x00000410,		     /* 0x02C */
+	0x00000101,		     /* 0x030 */
+	0x00000024,		     /* 0x214 */
+	0x03002900,		     /* 0x2E0 */
+	0x0E0000A0,		     /* 0x2E4 */
+	0x000E001C,		     /* 0x2E8 */
+	0x35B8C106,		     /* 0x2EC */
+	0x08080607,		     /* 0x2F0 */
+	0x9B000900,		     /* 0x2F4 */
+	0x0E400A00,		     /* 0x2F8 */
+	0x99714545,		     /* tRFC  */
+	0x000071C1		     /* PLL   */
+};
+
+#define TIMEOUT              5000000
+
+void ast_2500_patch_ahb(void __iomem *regs)
+{
+	u32 data;
+
+	/* Clear bus lock condition */
+	__ast_moutdwm(regs, 0x1e600000, 0xAEED1A03);
+	__ast_moutdwm(regs, 0x1e600084, 0x00010000);
+	__ast_moutdwm(regs, 0x1e600088, 0x00000000);
+	__ast_moutdwm(regs, 0x1e6e2000, 0x1688A8A8);
+
+	data = __ast_mindwm(regs, 0x1e6e2070);
+	if (data & 0x08000000) { /* check fast reset */
+		/*
+		 * If "Fast restet" is enabled for ARM-ICE debugger,
+		 * then WDT needs to enable, that
+		 * WDT04 is WDT#1 Reload reg.
+		 * WDT08 is WDT#1 counter restart reg to avoid system deadlock
+		 * WDT0C is WDT#1 control reg
+		 *	[6:5]:= 01:Full chip
+		 *	[4]:= 1:1MHz clock source
+		 *	[1]:= 1:WDT will be cleeared and disabled after timeout occurs
+		 *	[0]:= 1:WDT enable
+		 */
+		__ast_moutdwm(regs, 0x1E785004, 0x00000010);
+		__ast_moutdwm(regs, 0x1E785008, 0x00004755);
+		__ast_moutdwm(regs, 0x1E78500c, 0x00000033);
+		udelay(1000);
+	}
+
+	do {
+		__ast_moutdwm(regs, 0x1e6e2000, 0x1688A8A8);
+		data = __ast_mindwm(regs, 0x1e6e2000);
+	} while (data != 1);
+
+	__ast_moutdwm(regs, 0x1e6e207c, 0x08000000); /* clear fast reset */
+}
+
+static bool mmc_test_single_2500(struct ast_device *ast, u32 datagen)
+{
+	return mmc_test(ast, datagen, 0x85);
+}
+
+static bool cbr_test_2500(struct ast_device *ast)
+{
+	ast_moutdwm(ast, 0x1E6E0074, 0x0000FFFF);
+	ast_moutdwm(ast, 0x1E6E007C, 0xFF00FF00);
+	if (!mmc_test_burst(ast, 0))
+		return false;
+	if (!mmc_test_single_2500(ast, 0))
+		return false;
+	return true;
+}
+
+static bool ddr_test_2500(struct ast_device *ast)
+{
+	ast_moutdwm(ast, 0x1E6E0074, 0x0000FFFF);
+	ast_moutdwm(ast, 0x1E6E007C, 0xFF00FF00);
+	if (!mmc_test_burst(ast, 0))
+		return false;
+	if (!mmc_test_burst(ast, 1))
+		return false;
+	if (!mmc_test_burst(ast, 2))
+		return false;
+	if (!mmc_test_burst(ast, 3))
+		return false;
+	if (!mmc_test_single_2500(ast, 0))
+		return false;
+	return true;
+}
+
+static void ddr_init_common_2500(struct ast_device *ast)
+{
+	ast_moutdwm(ast, 0x1E6E0034, 0x00020080);
+	ast_moutdwm(ast, 0x1E6E0008, 0x2003000F);
+	ast_moutdwm(ast, 0x1E6E0038, 0x00000FFF);
+	ast_moutdwm(ast, 0x1E6E0040, 0x88448844);
+	ast_moutdwm(ast, 0x1E6E0044, 0x24422288);
+	ast_moutdwm(ast, 0x1E6E0048, 0x22222222);
+	ast_moutdwm(ast, 0x1E6E004C, 0x22222222);
+	ast_moutdwm(ast, 0x1E6E0050, 0x80000000);
+	ast_moutdwm(ast, 0x1E6E0208, 0x00000000);
+	ast_moutdwm(ast, 0x1E6E0218, 0x00000000);
+	ast_moutdwm(ast, 0x1E6E0220, 0x00000000);
+	ast_moutdwm(ast, 0x1E6E0228, 0x00000000);
+	ast_moutdwm(ast, 0x1E6E0230, 0x00000000);
+	ast_moutdwm(ast, 0x1E6E02A8, 0x00000000);
+	ast_moutdwm(ast, 0x1E6E02B0, 0x00000000);
+	ast_moutdwm(ast, 0x1E6E0240, 0x86000000);
+	ast_moutdwm(ast, 0x1E6E0244, 0x00008600);
+	ast_moutdwm(ast, 0x1E6E0248, 0x80000000);
+	ast_moutdwm(ast, 0x1E6E024C, 0x80808080);
+}
+
+static void ddr_phy_init_2500(struct ast_device *ast)
+{
+	u32 data, pass, timecnt;
+
+	pass = 0;
+	ast_moutdwm(ast, 0x1E6E0060, 0x00000005);
+	while (!pass) {
+		for (timecnt = 0; timecnt < TIMEOUT; timecnt++) {
+			data = ast_mindwm(ast, 0x1E6E0060) & 0x1;
+			if (!data)
+				break;
+		}
+		if (timecnt != TIMEOUT) {
+			data = ast_mindwm(ast, 0x1E6E0300) & 0x000A0000;
+			if (!data)
+				pass = 1;
+		}
+		if (!pass) {
+			ast_moutdwm(ast, 0x1E6E0060, 0x00000000);
+			udelay(10); /* delay 10 us */
+			ast_moutdwm(ast, 0x1E6E0060, 0x00000005);
+		}
+	}
+
+	ast_moutdwm(ast, 0x1E6E0060, 0x00000006);
+}
+
+/*
+ * Check DRAM Size
+ * 1Gb : 0x80000000 ~ 0x87FFFFFF
+ * 2Gb : 0x80000000 ~ 0x8FFFFFFF
+ * 4Gb : 0x80000000 ~ 0x9FFFFFFF
+ * 8Gb : 0x80000000 ~ 0xBFFFFFFF
+ */
+static void check_dram_size_2500(struct ast_device *ast, u32 tRFC)
+{
+	u32 reg_04, reg_14;
+
+	reg_04 = ast_mindwm(ast, 0x1E6E0004) & 0xfffffffc;
+	reg_14 = ast_mindwm(ast, 0x1E6E0014) & 0xffffff00;
+
+	ast_moutdwm(ast, 0xA0100000, 0x41424344);
+	ast_moutdwm(ast, 0x90100000, 0x35363738);
+	ast_moutdwm(ast, 0x88100000, 0x292A2B2C);
+	ast_moutdwm(ast, 0x80100000, 0x1D1E1F10);
+
+	/* Check 8Gbit */
+	if (ast_mindwm(ast, 0xA0100000) == 0x41424344) {
+		reg_04 |= 0x03;
+		reg_14 |= (tRFC >> 24) & 0xFF;
+		/* Check 4Gbit */
+	} else if (ast_mindwm(ast, 0x90100000) == 0x35363738) {
+		reg_04 |= 0x02;
+		reg_14 |= (tRFC >> 16) & 0xFF;
+		/* Check 2Gbit */
+	} else if (ast_mindwm(ast, 0x88100000) == 0x292A2B2C) {
+		reg_04 |= 0x01;
+		reg_14 |= (tRFC >> 8) & 0xFF;
+	} else {
+		reg_14 |= tRFC & 0xFF;
+	}
+	ast_moutdwm(ast, 0x1E6E0004, reg_04);
+	ast_moutdwm(ast, 0x1E6E0014, reg_14);
+}
+
+static void enable_cache_2500(struct ast_device *ast)
+{
+	u32 reg_04, data;
+
+	reg_04 = ast_mindwm(ast, 0x1E6E0004);
+	ast_moutdwm(ast, 0x1E6E0004, reg_04 | 0x1000);
+
+	do
+		data = ast_mindwm(ast, 0x1E6E0004);
+	while (!(data & 0x80000));
+	ast_moutdwm(ast, 0x1E6E0004, reg_04 | 0x400);
+}
+
+static void set_mpll_2500(struct ast_device *ast)
+{
+	u32 addr, data, param;
+
+	/* Reset MMC */
+	ast_moutdwm(ast, 0x1E6E0000, 0xFC600309);
+	ast_moutdwm(ast, 0x1E6E0034, 0x00020080);
+	for (addr = 0x1e6e0004; addr < 0x1e6e0090;) {
+		ast_moutdwm(ast, addr, 0x0);
+		addr += 4;
+	}
+	ast_moutdwm(ast, 0x1E6E0034, 0x00020000);
+
+	ast_moutdwm(ast, 0x1E6E2000, 0x1688A8A8);
+	data = ast_mindwm(ast, 0x1E6E2070) & 0x00800000;
+	if (data) {
+		/* CLKIN = 25MHz */
+		param = 0x930023E0;
+		ast_moutdwm(ast, 0x1E6E2160, 0x00011320);
+	} else {
+		/* CLKIN = 24MHz */
+		param = 0x93002400;
+	}
+	ast_moutdwm(ast, 0x1E6E2020, param);
+	udelay(100);
+}
+
+static void reset_mmc_2500(struct ast_device *ast)
+{
+	ast_moutdwm(ast, 0x1E78505C, 0x00000004);
+	ast_moutdwm(ast, 0x1E785044, 0x00000001);
+	ast_moutdwm(ast, 0x1E785048, 0x00004755);
+	ast_moutdwm(ast, 0x1E78504C, 0x00000013);
+	mdelay(100);
+	ast_moutdwm(ast, 0x1E785054, 0x00000077);
+	ast_moutdwm(ast, 0x1E6E0000, 0xFC600309);
+}
+
+static void ddr3_init_2500(struct ast_device *ast, const u32 *ddr_table)
+{
+	ast_moutdwm(ast, 0x1E6E0004, 0x00000303);
+	ast_moutdwm(ast, 0x1E6E0010, ddr_table[REGIDX_010]);
+	ast_moutdwm(ast, 0x1E6E0014, ddr_table[REGIDX_014]);
+	ast_moutdwm(ast, 0x1E6E0018, ddr_table[REGIDX_018]);
+	ast_moutdwm(ast, 0x1E6E0020, ddr_table[REGIDX_020]);	     /* MODEREG4/6 */
+	ast_moutdwm(ast, 0x1E6E0024, ddr_table[REGIDX_024]);	     /* MODEREG5 */
+	ast_moutdwm(ast, 0x1E6E002C, ddr_table[REGIDX_02C] | 0x100); /* MODEREG0/2 */
+	ast_moutdwm(ast, 0x1E6E0030, ddr_table[REGIDX_030]);	     /* MODEREG1/3 */
+
+	/* DDR PHY Setting */
+	ast_moutdwm(ast, 0x1E6E0200, 0x02492AAE);
+	ast_moutdwm(ast, 0x1E6E0204, 0x00001001);
+	ast_moutdwm(ast, 0x1E6E020C, 0x55E00B0B);
+	ast_moutdwm(ast, 0x1E6E0210, 0x20000000);
+	ast_moutdwm(ast, 0x1E6E0214, ddr_table[REGIDX_214]);
+	ast_moutdwm(ast, 0x1E6E02E0, ddr_table[REGIDX_2E0]);
+	ast_moutdwm(ast, 0x1E6E02E4, ddr_table[REGIDX_2E4]);
+	ast_moutdwm(ast, 0x1E6E02E8, ddr_table[REGIDX_2E8]);
+	ast_moutdwm(ast, 0x1E6E02EC, ddr_table[REGIDX_2EC]);
+	ast_moutdwm(ast, 0x1E6E02F0, ddr_table[REGIDX_2F0]);
+	ast_moutdwm(ast, 0x1E6E02F4, ddr_table[REGIDX_2F4]);
+	ast_moutdwm(ast, 0x1E6E02F8, ddr_table[REGIDX_2F8]);
+	ast_moutdwm(ast, 0x1E6E0290, 0x00100008);
+	ast_moutdwm(ast, 0x1E6E02C0, 0x00000006);
+
+	/* Controller Setting */
+	ast_moutdwm(ast, 0x1E6E0034, 0x00020091);
+
+	/* Wait DDR PHY init done */
+	ddr_phy_init_2500(ast);
+
+	ast_moutdwm(ast, 0x1E6E0120, ddr_table[REGIDX_PLL]);
+	ast_moutdwm(ast, 0x1E6E000C, 0x42AA5C81);
+	ast_moutdwm(ast, 0x1E6E0034, 0x0001AF93);
+
+	check_dram_size_2500(ast, ddr_table[REGIDX_RFC]);
+	enable_cache_2500(ast);
+	ast_moutdwm(ast, 0x1E6E001C, 0x00000008);
+	ast_moutdwm(ast, 0x1E6E0038, 0xFFFFFF00);
+}
+
+static void ddr4_init_2500(struct ast_device *ast, const u32 *ddr_table)
+{
+	u32 data, data2, pass, retrycnt;
+	u32 ddr_vref, phy_vref;
+	u32 min_ddr_vref = 0, min_phy_vref = 0;
+	u32 max_ddr_vref = 0, max_phy_vref = 0;
+
+	ast_moutdwm(ast, 0x1E6E0004, 0x00000313);
+	ast_moutdwm(ast, 0x1E6E0010, ddr_table[REGIDX_010]);
+	ast_moutdwm(ast, 0x1E6E0014, ddr_table[REGIDX_014]);
+	ast_moutdwm(ast, 0x1E6E0018, ddr_table[REGIDX_018]);
+	ast_moutdwm(ast, 0x1E6E0020, ddr_table[REGIDX_020]);	     /* MODEREG4/6 */
+	ast_moutdwm(ast, 0x1E6E0024, ddr_table[REGIDX_024]);	     /* MODEREG5 */
+	ast_moutdwm(ast, 0x1E6E002C, ddr_table[REGIDX_02C] | 0x100); /* MODEREG0/2 */
+	ast_moutdwm(ast, 0x1E6E0030, ddr_table[REGIDX_030]);	     /* MODEREG1/3 */
+
+	/* DDR PHY Setting */
+	ast_moutdwm(ast, 0x1E6E0200, 0x42492AAE);
+	ast_moutdwm(ast, 0x1E6E0204, 0x09002000);
+	ast_moutdwm(ast, 0x1E6E020C, 0x55E00B0B);
+	ast_moutdwm(ast, 0x1E6E0210, 0x20000000);
+	ast_moutdwm(ast, 0x1E6E0214, ddr_table[REGIDX_214]);
+	ast_moutdwm(ast, 0x1E6E02E0, ddr_table[REGIDX_2E0]);
+	ast_moutdwm(ast, 0x1E6E02E4, ddr_table[REGIDX_2E4]);
+	ast_moutdwm(ast, 0x1E6E02E8, ddr_table[REGIDX_2E8]);
+	ast_moutdwm(ast, 0x1E6E02EC, ddr_table[REGIDX_2EC]);
+	ast_moutdwm(ast, 0x1E6E02F0, ddr_table[REGIDX_2F0]);
+	ast_moutdwm(ast, 0x1E6E02F4, ddr_table[REGIDX_2F4]);
+	ast_moutdwm(ast, 0x1E6E02F8, ddr_table[REGIDX_2F8]);
+	ast_moutdwm(ast, 0x1E6E0290, 0x00100008);
+	ast_moutdwm(ast, 0x1E6E02C4, 0x3C183C3C);
+	ast_moutdwm(ast, 0x1E6E02C8, 0x00631E0E);
+
+	/* Controller Setting */
+	ast_moutdwm(ast, 0x1E6E0034, 0x0001A991);
+
+	/* Train PHY Vref first */
+	pass = 0;
+
+	for (retrycnt = 0; retrycnt < 4 && pass == 0; retrycnt++) {
+		max_phy_vref = 0x0;
+		pass = 0;
+		ast_moutdwm(ast, 0x1E6E02C0, 0x00001C06);
+		for (phy_vref = 0x40; phy_vref < 0x80; phy_vref++) {
+			ast_moutdwm(ast, 0x1E6E000C, 0x00000000);
+			ast_moutdwm(ast, 0x1E6E0060, 0x00000000);
+			ast_moutdwm(ast, 0x1E6E02CC, phy_vref | (phy_vref << 8));
+			/* Fire DFI Init */
+			ddr_phy_init_2500(ast);
+			ast_moutdwm(ast, 0x1E6E000C, 0x00005C01);
+			if (cbr_test_2500(ast)) {
+				pass++;
+				data = ast_mindwm(ast, 0x1E6E03D0);
+				data2 = data >> 8;
+				data  = data & 0xff;
+				if (data > data2)
+					data = data2;
+				if (max_phy_vref < data) {
+					max_phy_vref = data;
+					min_phy_vref = phy_vref;
+				}
+			} else if (pass > 0) {
+				break;
+			}
+		}
+	}
+	ast_moutdwm(ast, 0x1E6E02CC, min_phy_vref | (min_phy_vref << 8));
+
+	/* Train DDR Vref next */
+	pass = 0;
+
+	for (retrycnt = 0; retrycnt < 4 && pass == 0; retrycnt++) {
+		min_ddr_vref = 0xFF;
+		max_ddr_vref = 0x0;
+		pass = 0;
+		for (ddr_vref = 0x00; ddr_vref < 0x40; ddr_vref++) {
+			ast_moutdwm(ast, 0x1E6E000C, 0x00000000);
+			ast_moutdwm(ast, 0x1E6E0060, 0x00000000);
+			ast_moutdwm(ast, 0x1E6E02C0, 0x00000006 | (ddr_vref << 8));
+			/* Fire DFI Init */
+			ddr_phy_init_2500(ast);
+			ast_moutdwm(ast, 0x1E6E000C, 0x00005C01);
+			if (cbr_test_2500(ast)) {
+				pass++;
+				if (min_ddr_vref > ddr_vref)
+					min_ddr_vref = ddr_vref;
+				if (max_ddr_vref < ddr_vref)
+					max_ddr_vref = ddr_vref;
+			} else if (pass != 0) {
+				break;
+			}
+		}
+	}
+
+	ast_moutdwm(ast, 0x1E6E000C, 0x00000000);
+	ast_moutdwm(ast, 0x1E6E0060, 0x00000000);
+	ddr_vref = (min_ddr_vref + max_ddr_vref + 1) >> 1;
+	ast_moutdwm(ast, 0x1E6E02C0, 0x00000006 | (ddr_vref << 8));
+
+	/* Wait DDR PHY init done */
+	ddr_phy_init_2500(ast);
+
+	ast_moutdwm(ast, 0x1E6E0120, ddr_table[REGIDX_PLL]);
+	ast_moutdwm(ast, 0x1E6E000C, 0x42AA5C81);
+	ast_moutdwm(ast, 0x1E6E0034, 0x0001AF93);
+
+	check_dram_size_2500(ast, ddr_table[REGIDX_RFC]);
+	enable_cache_2500(ast);
+	ast_moutdwm(ast, 0x1E6E001C, 0x00000008);
+	ast_moutdwm(ast, 0x1E6E0038, 0xFFFFFF00);
+}
+
+static bool ast_dram_init_2500(struct ast_device *ast)
+{
+	u32 data;
+	u32 max_tries = 5;
+
+	do {
+		if (max_tries-- == 0)
+			return false;
+		set_mpll_2500(ast);
+		reset_mmc_2500(ast);
+		ddr_init_common_2500(ast);
+
+		data = ast_mindwm(ast, 0x1E6E2070);
+		if (data & 0x01000000)
+			ddr4_init_2500(ast, ast2500_ddr4_1600_timing_table);
+		else
+			ddr3_init_2500(ast, ast2500_ddr3_1600_timing_table);
+	} while (!ddr_test_2500(ast));
+
+	ast_moutdwm(ast, 0x1E6E2040, ast_mindwm(ast, 0x1E6E2040) | 0x41);
+
+	/* Patch code */
+	data = ast_mindwm(ast, 0x1E6E200C) & 0xF9FFFFFF;
+	ast_moutdwm(ast, 0x1E6E200C, data | 0x10000000);
+
+	return true;
+}
+
+static void ast_post_chip_2500(struct ast_device *ast)
+{
+	struct drm_device *dev = &ast->base;
+	u32 temp;
+	u8 reg;
+
+	reg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd0, 0xff);
+	if ((reg & AST_IO_VGACRD0_VRAM_INIT_STATUS_MASK) == 0) {/* vga only */
+		/* Clear bus lock condition */
+		ast_2500_patch_ahb(ast->regs);
+
+		/* Disable watchdog */
+		ast_moutdwm(ast, 0x1E78502C, 0x00000000);
+		ast_moutdwm(ast, 0x1E78504C, 0x00000000);
+
+		/*
+		 * Reset USB port to patch USB unknown device issue
+		 * SCU90 is Multi-function Pin Control #5
+		 *	[29]:= 1:Enable USB2.0 Host port#1 (that the mutually shared USB2.0 Hub
+		 *				port).
+		 * SCU94 is Multi-function Pin Control #6
+		 *	[14:13]:= 1x:USB2.0 Host2 controller
+		 * SCU70 is Hardware Strap reg
+		 *	[23]:= 1:CLKIN is 25MHz and USBCK1 = 24/48 MHz (determined by
+		 *				[18]: 0(24)/1(48) MHz)
+		 * SCU7C is Write clear reg to SCU70
+		 *	[23]:= write 1 and then SCU70[23] will be clear as 0b.
+		 */
+		ast_moutdwm(ast, 0x1E6E2090, 0x20000000);
+		ast_moutdwm(ast, 0x1E6E2094, 0x00004000);
+		if (ast_mindwm(ast, 0x1E6E2070) & 0x00800000) {
+			ast_moutdwm(ast, 0x1E6E207C, 0x00800000);
+			mdelay(100);
+			ast_moutdwm(ast, 0x1E6E2070, 0x00800000);
+		}
+		/* Modify eSPI reset pin */
+		temp = ast_mindwm(ast, 0x1E6E2070);
+		if (temp & 0x02000000)
+			ast_moutdwm(ast, 0x1E6E207C, 0x00004000);
+
+		/* Slow down CPU/AHB CLK in VGA only mode */
+		temp = ast_read32(ast, 0x12008);
+		temp |= 0x73;
+		ast_write32(ast, 0x12008, temp);
+
+		if (!ast_dram_init_2500(ast))
+			drm_err(dev, "DRAM init failed !\n");
+
+		temp = ast_mindwm(ast, 0x1e6e2040);
+		ast_moutdwm(ast, 0x1e6e2040, temp | 0x40);
+	}
+
+	/* wait ready */
+	do {
+		reg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd0, 0xff);
+	} while ((reg & 0x40) == 0);
+}
+
+int ast_2500_post(struct ast_device *ast)
+{
+	if (ast->config_mode == ast_use_p2a) {
+		ast_post_chip_2500(ast);
+	} else {
+		if (ast->tx_chip == AST_TX_SIL164) {
+			/* Enable DVO */
+			ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xa3, 0xcf, 0x80);
+		}
+	}
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/ast/ast_dram_tables.h b/drivers/gpu/drm/ast/ast_dram_tables.h
index 1e9ac9d6d26c..45bd1afab0d5 100644
--- a/drivers/gpu/drm/ast/ast_dram_tables.h
+++ b/drivers/gpu/drm/ast/ast_dram_tables.h
@@ -142,66 +142,4 @@ static const struct ast_dramstruct ast2100_dram_table_data[] = {
 	{ 0xffff, 0xffffffff },
 };
 
-/*
- * AST2500 DRAM settings modules
- */
-#define REGTBL_NUM           17
-#define REGIDX_010           0
-#define REGIDX_014           1
-#define REGIDX_018           2
-#define REGIDX_020           3
-#define REGIDX_024           4
-#define REGIDX_02C           5
-#define REGIDX_030           6
-#define REGIDX_214           7
-#define REGIDX_2E0           8
-#define REGIDX_2E4           9
-#define REGIDX_2E8           10
-#define REGIDX_2EC           11
-#define REGIDX_2F0           12
-#define REGIDX_2F4           13
-#define REGIDX_2F8           14
-#define REGIDX_RFC           15
-#define REGIDX_PLL           16
-
-static const u32 ast2500_ddr3_1600_timing_table[REGTBL_NUM] = {
-	0x64604D38,		     /* 0x010 */
-	0x29690599,		     /* 0x014 */
-	0x00000300,		     /* 0x018 */
-	0x00000000,		     /* 0x020 */
-	0x00000000,		     /* 0x024 */
-	0x02181E70,		     /* 0x02C */
-	0x00000040,		     /* 0x030 */
-	0x00000024,		     /* 0x214 */
-	0x02001300,		     /* 0x2E0 */
-	0x0E0000A0,		     /* 0x2E4 */
-	0x000E001B,		     /* 0x2E8 */
-	0x35B8C105,		     /* 0x2EC */
-	0x08090408,		     /* 0x2F0 */
-	0x9B000800,		     /* 0x2F4 */
-	0x0E400A00,		     /* 0x2F8 */
-	0x9971452F,		     /* tRFC  */
-	0x000071C1		     /* PLL   */
-};
-
-static const u32 ast2500_ddr4_1600_timing_table[REGTBL_NUM] = {
-	0x63604E37,		     /* 0x010 */
-	0xE97AFA99,		     /* 0x014 */
-	0x00019000,		     /* 0x018 */
-	0x08000000,		     /* 0x020 */
-	0x00000400,		     /* 0x024 */
-	0x00000410,		     /* 0x02C */
-	0x00000101,		     /* 0x030 */
-	0x00000024,		     /* 0x214 */
-	0x03002900,		     /* 0x2E0 */
-	0x0E0000A0,		     /* 0x2E4 */
-	0x000E001C,		     /* 0x2E8 */
-	0x35B8C106,		     /* 0x2EC */
-	0x08080607,		     /* 0x2F0 */
-	0x9B000900,		     /* 0x2F4 */
-	0x0E400A00,		     /* 0x2F8 */
-	0x99714545,		     /* tRFC  */
-	0x000071C1		     /* PLL   */
-};
-
 #endif
diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c
index 054acda41909..356b3b7e52d2 100644
--- a/drivers/gpu/drm/ast/ast_drv.c
+++ b/drivers/gpu/drm/ast/ast_drv.c
@@ -171,7 +171,7 @@ static int ast_detect_chip(struct pci_dev *pdev,
 			/* Patch AST2500/AST2510 */
 			if ((pdev->revision & 0xf0) == 0x40) {
 				if (!(vgacrd0 & AST_IO_VGACRD0_VRAM_INIT_STATUS_MASK))
-					ast_patch_ahb_2500(regs);
+					ast_2500_patch_ahb(regs);
 			}
 
 			/* Double check that it's actually working */
diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index 570c2fe98b58..4a92c377e9bd 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -417,6 +417,10 @@ struct ast_crtc_state {
 
 int ast_mm_init(struct ast_device *ast);
 
+/* ast_2500.c */
+void ast_2500_patch_ahb(void __iomem *regs);
+int ast_2500_post(struct ast_device *ast);
+
 /* ast_2600.c */
 int ast_2600_post(struct ast_device *ast);
 
@@ -424,7 +428,6 @@ int ast_2600_post(struct ast_device *ast);
 int ast_post_gpu(struct ast_device *ast);
 u32 ast_mindwm(struct ast_device *ast, u32 r);
 void ast_moutdwm(struct ast_device *ast, u32 r, u32 v);
-void ast_patch_ahb_2500(void __iomem *regs);
 
 int ast_vga_output_init(struct ast_device *ast);
 int ast_sil164_output_init(struct ast_device *ast);
diff --git a/drivers/gpu/drm/ast/ast_post.c b/drivers/gpu/drm/ast/ast_post.c
index 03a7367bdc71..0d99270b58c4 100644
--- a/drivers/gpu/drm/ast/ast_post.c
+++ b/drivers/gpu/drm/ast/ast_post.c
@@ -36,7 +36,6 @@
 #include "ast_post.h"
 
 static void ast_post_chip_2300(struct ast_device *ast);
-static void ast_post_chip_2500(struct ast_device *ast);
 
 static const u8 extreginfo[] = { 0x0f, 0x04, 0x1c, 0xff };
 static const u8 extreginfo_ast2300[] = { 0x0f, 0x04, 0x1f, 0xff };
@@ -352,14 +351,9 @@ int ast_post_gpu(struct ast_device *ast)
 		if (ret)
 			return ret;
 	} else if (AST_GEN(ast) >= 6) {
-		if (ast->config_mode == ast_use_p2a) {
-			ast_post_chip_2500(ast);
-		} else {
-			if (ast->tx_chip == AST_TX_SIL164) {
-				/* Enable DVO */
-				ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xa3, 0xcf, 0x80);
-			}
-		}
+		ret = ast_2500_post(ast);
+		if (ret)
+			return ret;
 	} else if (AST_GEN(ast) >= 4) {
 		if (ast->config_mode == ast_use_p2a) {
 			ast_post_chip_2300(ast);
@@ -497,11 +491,6 @@ static u32 mmc_test_single2(struct ast_device *ast, u32 datagen)
 	return mmc_test2(ast, datagen, 0x05);
 }
 
-static bool mmc_test_single_2500(struct ast_device *ast, u32 datagen)
-{
-	return mmc_test(ast, datagen, 0x85);
-}
-
 static int cbr_test(struct ast_device *ast)
 {
 	u32 data;
@@ -1666,447 +1655,3 @@ static void ast_post_chip_2300(struct ast_device *ast)
 		reg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd0, 0xff);
 	} while ((reg & 0x40) == 0);
 }
-
-static bool cbr_test_2500(struct ast_device *ast)
-{
-	ast_moutdwm(ast, 0x1E6E0074, 0x0000FFFF);
-	ast_moutdwm(ast, 0x1E6E007C, 0xFF00FF00);
-	if (!mmc_test_burst(ast, 0))
-		return false;
-	if (!mmc_test_single_2500(ast, 0))
-		return false;
-	return true;
-}
-
-static bool ddr_test_2500(struct ast_device *ast)
-{
-	ast_moutdwm(ast, 0x1E6E0074, 0x0000FFFF);
-	ast_moutdwm(ast, 0x1E6E007C, 0xFF00FF00);
-	if (!mmc_test_burst(ast, 0))
-		return false;
-	if (!mmc_test_burst(ast, 1))
-		return false;
-	if (!mmc_test_burst(ast, 2))
-		return false;
-	if (!mmc_test_burst(ast, 3))
-		return false;
-	if (!mmc_test_single_2500(ast, 0))
-		return false;
-	return true;
-}
-
-static void ddr_init_common_2500(struct ast_device *ast)
-{
-	ast_moutdwm(ast, 0x1E6E0034, 0x00020080);
-	ast_moutdwm(ast, 0x1E6E0008, 0x2003000F);
-	ast_moutdwm(ast, 0x1E6E0038, 0x00000FFF);
-	ast_moutdwm(ast, 0x1E6E0040, 0x88448844);
-	ast_moutdwm(ast, 0x1E6E0044, 0x24422288);
-	ast_moutdwm(ast, 0x1E6E0048, 0x22222222);
-	ast_moutdwm(ast, 0x1E6E004C, 0x22222222);
-	ast_moutdwm(ast, 0x1E6E0050, 0x80000000);
-	ast_moutdwm(ast, 0x1E6E0208, 0x00000000);
-	ast_moutdwm(ast, 0x1E6E0218, 0x00000000);
-	ast_moutdwm(ast, 0x1E6E0220, 0x00000000);
-	ast_moutdwm(ast, 0x1E6E0228, 0x00000000);
-	ast_moutdwm(ast, 0x1E6E0230, 0x00000000);
-	ast_moutdwm(ast, 0x1E6E02A8, 0x00000000);
-	ast_moutdwm(ast, 0x1E6E02B0, 0x00000000);
-	ast_moutdwm(ast, 0x1E6E0240, 0x86000000);
-	ast_moutdwm(ast, 0x1E6E0244, 0x00008600);
-	ast_moutdwm(ast, 0x1E6E0248, 0x80000000);
-	ast_moutdwm(ast, 0x1E6E024C, 0x80808080);
-}
-
-static void ddr_phy_init_2500(struct ast_device *ast)
-{
-	u32 data, pass, timecnt;
-
-	pass = 0;
-	ast_moutdwm(ast, 0x1E6E0060, 0x00000005);
-	while (!pass) {
-		for (timecnt = 0; timecnt < TIMEOUT; timecnt++) {
-			data = ast_mindwm(ast, 0x1E6E0060) & 0x1;
-			if (!data)
-				break;
-		}
-		if (timecnt != TIMEOUT) {
-			data = ast_mindwm(ast, 0x1E6E0300) & 0x000A0000;
-			if (!data)
-				pass = 1;
-		}
-		if (!pass) {
-			ast_moutdwm(ast, 0x1E6E0060, 0x00000000);
-			udelay(10); /* delay 10 us */
-			ast_moutdwm(ast, 0x1E6E0060, 0x00000005);
-		}
-	}
-
-	ast_moutdwm(ast, 0x1E6E0060, 0x00000006);
-}
-
-/*
- * Check DRAM Size
- * 1Gb : 0x80000000 ~ 0x87FFFFFF
- * 2Gb : 0x80000000 ~ 0x8FFFFFFF
- * 4Gb : 0x80000000 ~ 0x9FFFFFFF
- * 8Gb : 0x80000000 ~ 0xBFFFFFFF
- */
-static void check_dram_size_2500(struct ast_device *ast, u32 tRFC)
-{
-	u32 reg_04, reg_14;
-
-	reg_04 = ast_mindwm(ast, 0x1E6E0004) & 0xfffffffc;
-	reg_14 = ast_mindwm(ast, 0x1E6E0014) & 0xffffff00;
-
-	ast_moutdwm(ast, 0xA0100000, 0x41424344);
-	ast_moutdwm(ast, 0x90100000, 0x35363738);
-	ast_moutdwm(ast, 0x88100000, 0x292A2B2C);
-	ast_moutdwm(ast, 0x80100000, 0x1D1E1F10);
-
-	/* Check 8Gbit */
-	if (ast_mindwm(ast, 0xA0100000) == 0x41424344) {
-		reg_04 |= 0x03;
-		reg_14 |= (tRFC >> 24) & 0xFF;
-		/* Check 4Gbit */
-	} else if (ast_mindwm(ast, 0x90100000) == 0x35363738) {
-		reg_04 |= 0x02;
-		reg_14 |= (tRFC >> 16) & 0xFF;
-		/* Check 2Gbit */
-	} else if (ast_mindwm(ast, 0x88100000) == 0x292A2B2C) {
-		reg_04 |= 0x01;
-		reg_14 |= (tRFC >> 8) & 0xFF;
-	} else {
-		reg_14 |= tRFC & 0xFF;
-	}
-	ast_moutdwm(ast, 0x1E6E0004, reg_04);
-	ast_moutdwm(ast, 0x1E6E0014, reg_14);
-}
-
-static void enable_cache_2500(struct ast_device *ast)
-{
-	u32 reg_04, data;
-
-	reg_04 = ast_mindwm(ast, 0x1E6E0004);
-	ast_moutdwm(ast, 0x1E6E0004, reg_04 | 0x1000);
-
-	do
-		data = ast_mindwm(ast, 0x1E6E0004);
-	while (!(data & 0x80000));
-	ast_moutdwm(ast, 0x1E6E0004, reg_04 | 0x400);
-}
-
-static void set_mpll_2500(struct ast_device *ast)
-{
-	u32 addr, data, param;
-
-	/* Reset MMC */
-	ast_moutdwm(ast, 0x1E6E0000, 0xFC600309);
-	ast_moutdwm(ast, 0x1E6E0034, 0x00020080);
-	for (addr = 0x1e6e0004; addr < 0x1e6e0090;) {
-		ast_moutdwm(ast, addr, 0x0);
-		addr += 4;
-	}
-	ast_moutdwm(ast, 0x1E6E0034, 0x00020000);
-
-	ast_moutdwm(ast, 0x1E6E2000, 0x1688A8A8);
-	data = ast_mindwm(ast, 0x1E6E2070) & 0x00800000;
-	if (data) {
-		/* CLKIN = 25MHz */
-		param = 0x930023E0;
-		ast_moutdwm(ast, 0x1E6E2160, 0x00011320);
-	} else {
-		/* CLKIN = 24MHz */
-		param = 0x93002400;
-	}
-	ast_moutdwm(ast, 0x1E6E2020, param);
-	udelay(100);
-}
-
-static void reset_mmc_2500(struct ast_device *ast)
-{
-	ast_moutdwm(ast, 0x1E78505C, 0x00000004);
-	ast_moutdwm(ast, 0x1E785044, 0x00000001);
-	ast_moutdwm(ast, 0x1E785048, 0x00004755);
-	ast_moutdwm(ast, 0x1E78504C, 0x00000013);
-	mdelay(100);
-	ast_moutdwm(ast, 0x1E785054, 0x00000077);
-	ast_moutdwm(ast, 0x1E6E0000, 0xFC600309);
-}
-
-static void ddr3_init_2500(struct ast_device *ast, const u32 *ddr_table)
-{
-
-	ast_moutdwm(ast, 0x1E6E0004, 0x00000303);
-	ast_moutdwm(ast, 0x1E6E0010, ddr_table[REGIDX_010]);
-	ast_moutdwm(ast, 0x1E6E0014, ddr_table[REGIDX_014]);
-	ast_moutdwm(ast, 0x1E6E0018, ddr_table[REGIDX_018]);
-	ast_moutdwm(ast, 0x1E6E0020, ddr_table[REGIDX_020]);	     /* MODEREG4/6 */
-	ast_moutdwm(ast, 0x1E6E0024, ddr_table[REGIDX_024]);	     /* MODEREG5 */
-	ast_moutdwm(ast, 0x1E6E002C, ddr_table[REGIDX_02C] | 0x100); /* MODEREG0/2 */
-	ast_moutdwm(ast, 0x1E6E0030, ddr_table[REGIDX_030]);	     /* MODEREG1/3 */
-
-	/* DDR PHY Setting */
-	ast_moutdwm(ast, 0x1E6E0200, 0x02492AAE);
-	ast_moutdwm(ast, 0x1E6E0204, 0x00001001);
-	ast_moutdwm(ast, 0x1E6E020C, 0x55E00B0B);
-	ast_moutdwm(ast, 0x1E6E0210, 0x20000000);
-	ast_moutdwm(ast, 0x1E6E0214, ddr_table[REGIDX_214]);
-	ast_moutdwm(ast, 0x1E6E02E0, ddr_table[REGIDX_2E0]);
-	ast_moutdwm(ast, 0x1E6E02E4, ddr_table[REGIDX_2E4]);
-	ast_moutdwm(ast, 0x1E6E02E8, ddr_table[REGIDX_2E8]);
-	ast_moutdwm(ast, 0x1E6E02EC, ddr_table[REGIDX_2EC]);
-	ast_moutdwm(ast, 0x1E6E02F0, ddr_table[REGIDX_2F0]);
-	ast_moutdwm(ast, 0x1E6E02F4, ddr_table[REGIDX_2F4]);
-	ast_moutdwm(ast, 0x1E6E02F8, ddr_table[REGIDX_2F8]);
-	ast_moutdwm(ast, 0x1E6E0290, 0x00100008);
-	ast_moutdwm(ast, 0x1E6E02C0, 0x00000006);
-
-	/* Controller Setting */
-	ast_moutdwm(ast, 0x1E6E0034, 0x00020091);
-
-	/* Wait DDR PHY init done */
-	ddr_phy_init_2500(ast);
-
-	ast_moutdwm(ast, 0x1E6E0120, ddr_table[REGIDX_PLL]);
-	ast_moutdwm(ast, 0x1E6E000C, 0x42AA5C81);
-	ast_moutdwm(ast, 0x1E6E0034, 0x0001AF93);
-
-	check_dram_size_2500(ast, ddr_table[REGIDX_RFC]);
-	enable_cache_2500(ast);
-	ast_moutdwm(ast, 0x1E6E001C, 0x00000008);
-	ast_moutdwm(ast, 0x1E6E0038, 0xFFFFFF00);
-}
-
-static void ddr4_init_2500(struct ast_device *ast, const u32 *ddr_table)
-{
-	u32 data, data2, pass, retrycnt;
-	u32 ddr_vref, phy_vref;
-	u32 min_ddr_vref = 0, min_phy_vref = 0;
-	u32 max_ddr_vref = 0, max_phy_vref = 0;
-
-	ast_moutdwm(ast, 0x1E6E0004, 0x00000313);
-	ast_moutdwm(ast, 0x1E6E0010, ddr_table[REGIDX_010]);
-	ast_moutdwm(ast, 0x1E6E0014, ddr_table[REGIDX_014]);
-	ast_moutdwm(ast, 0x1E6E0018, ddr_table[REGIDX_018]);
-	ast_moutdwm(ast, 0x1E6E0020, ddr_table[REGIDX_020]);	     /* MODEREG4/6 */
-	ast_moutdwm(ast, 0x1E6E0024, ddr_table[REGIDX_024]);	     /* MODEREG5 */
-	ast_moutdwm(ast, 0x1E6E002C, ddr_table[REGIDX_02C] | 0x100); /* MODEREG0/2 */
-	ast_moutdwm(ast, 0x1E6E0030, ddr_table[REGIDX_030]);	     /* MODEREG1/3 */
-
-	/* DDR PHY Setting */
-	ast_moutdwm(ast, 0x1E6E0200, 0x42492AAE);
-	ast_moutdwm(ast, 0x1E6E0204, 0x09002000);
-	ast_moutdwm(ast, 0x1E6E020C, 0x55E00B0B);
-	ast_moutdwm(ast, 0x1E6E0210, 0x20000000);
-	ast_moutdwm(ast, 0x1E6E0214, ddr_table[REGIDX_214]);
-	ast_moutdwm(ast, 0x1E6E02E0, ddr_table[REGIDX_2E0]);
-	ast_moutdwm(ast, 0x1E6E02E4, ddr_table[REGIDX_2E4]);
-	ast_moutdwm(ast, 0x1E6E02E8, ddr_table[REGIDX_2E8]);
-	ast_moutdwm(ast, 0x1E6E02EC, ddr_table[REGIDX_2EC]);
-	ast_moutdwm(ast, 0x1E6E02F0, ddr_table[REGIDX_2F0]);
-	ast_moutdwm(ast, 0x1E6E02F4, ddr_table[REGIDX_2F4]);
-	ast_moutdwm(ast, 0x1E6E02F8, ddr_table[REGIDX_2F8]);
-	ast_moutdwm(ast, 0x1E6E0290, 0x00100008);
-	ast_moutdwm(ast, 0x1E6E02C4, 0x3C183C3C);
-	ast_moutdwm(ast, 0x1E6E02C8, 0x00631E0E);
-
-	/* Controller Setting */
-	ast_moutdwm(ast, 0x1E6E0034, 0x0001A991);
-
-	/* Train PHY Vref first */
-	pass = 0;
-
-	for (retrycnt = 0; retrycnt < 4 && pass == 0; retrycnt++) {
-		max_phy_vref = 0x0;
-		pass = 0;
-		ast_moutdwm(ast, 0x1E6E02C0, 0x00001C06);
-		for (phy_vref = 0x40; phy_vref < 0x80; phy_vref++) {
-			ast_moutdwm(ast, 0x1E6E000C, 0x00000000);
-			ast_moutdwm(ast, 0x1E6E0060, 0x00000000);
-			ast_moutdwm(ast, 0x1E6E02CC, phy_vref | (phy_vref << 8));
-			/* Fire DFI Init */
-			ddr_phy_init_2500(ast);
-			ast_moutdwm(ast, 0x1E6E000C, 0x00005C01);
-			if (cbr_test_2500(ast)) {
-				pass++;
-				data = ast_mindwm(ast, 0x1E6E03D0);
-				data2 = data >> 8;
-				data  = data & 0xff;
-				if (data > data2)
-					data = data2;
-				if (max_phy_vref < data) {
-					max_phy_vref = data;
-					min_phy_vref = phy_vref;
-				}
-			} else if (pass > 0)
-				break;
-		}
-	}
-	ast_moutdwm(ast, 0x1E6E02CC, min_phy_vref | (min_phy_vref << 8));
-
-	/* Train DDR Vref next */
-	pass = 0;
-
-	for (retrycnt = 0; retrycnt < 4 && pass == 0; retrycnt++) {
-		min_ddr_vref = 0xFF;
-		max_ddr_vref = 0x0;
-		pass = 0;
-		for (ddr_vref = 0x00; ddr_vref < 0x40; ddr_vref++) {
-			ast_moutdwm(ast, 0x1E6E000C, 0x00000000);
-			ast_moutdwm(ast, 0x1E6E0060, 0x00000000);
-			ast_moutdwm(ast, 0x1E6E02C0, 0x00000006 | (ddr_vref << 8));
-			/* Fire DFI Init */
-			ddr_phy_init_2500(ast);
-			ast_moutdwm(ast, 0x1E6E000C, 0x00005C01);
-			if (cbr_test_2500(ast)) {
-				pass++;
-				if (min_ddr_vref > ddr_vref)
-					min_ddr_vref = ddr_vref;
-				if (max_ddr_vref < ddr_vref)
-					max_ddr_vref = ddr_vref;
-			} else if (pass != 0)
-				break;
-		}
-	}
-
-	ast_moutdwm(ast, 0x1E6E000C, 0x00000000);
-	ast_moutdwm(ast, 0x1E6E0060, 0x00000000);
-	ddr_vref = (min_ddr_vref + max_ddr_vref + 1) >> 1;
-	ast_moutdwm(ast, 0x1E6E02C0, 0x00000006 | (ddr_vref << 8));
-
-	/* Wait DDR PHY init done */
-	ddr_phy_init_2500(ast);
-
-	ast_moutdwm(ast, 0x1E6E0120, ddr_table[REGIDX_PLL]);
-	ast_moutdwm(ast, 0x1E6E000C, 0x42AA5C81);
-	ast_moutdwm(ast, 0x1E6E0034, 0x0001AF93);
-
-	check_dram_size_2500(ast, ddr_table[REGIDX_RFC]);
-	enable_cache_2500(ast);
-	ast_moutdwm(ast, 0x1E6E001C, 0x00000008);
-	ast_moutdwm(ast, 0x1E6E0038, 0xFFFFFF00);
-}
-
-static bool ast_dram_init_2500(struct ast_device *ast)
-{
-	u32 data;
-	u32 max_tries = 5;
-
-	do {
-		if (max_tries-- == 0)
-			return false;
-		set_mpll_2500(ast);
-		reset_mmc_2500(ast);
-		ddr_init_common_2500(ast);
-
-		data = ast_mindwm(ast, 0x1E6E2070);
-		if (data & 0x01000000)
-			ddr4_init_2500(ast, ast2500_ddr4_1600_timing_table);
-		else
-			ddr3_init_2500(ast, ast2500_ddr3_1600_timing_table);
-	} while (!ddr_test_2500(ast));
-
-	ast_moutdwm(ast, 0x1E6E2040, ast_mindwm(ast, 0x1E6E2040) | 0x41);
-
-	/* Patch code */
-	data = ast_mindwm(ast, 0x1E6E200C) & 0xF9FFFFFF;
-	ast_moutdwm(ast, 0x1E6E200C, data | 0x10000000);
-
-	return true;
-}
-
-void ast_patch_ahb_2500(void __iomem *regs)
-{
-	u32 data;
-
-	/* Clear bus lock condition */
-	__ast_moutdwm(regs, 0x1e600000, 0xAEED1A03);
-	__ast_moutdwm(regs, 0x1e600084, 0x00010000);
-	__ast_moutdwm(regs, 0x1e600088, 0x00000000);
-	__ast_moutdwm(regs, 0x1e6e2000, 0x1688A8A8);
-
-	data = __ast_mindwm(regs, 0x1e6e2070);
-	if (data & 0x08000000) { /* check fast reset */
-		/*
-		 * If "Fast restet" is enabled for ARM-ICE debugger,
-		 * then WDT needs to enable, that
-		 * WDT04 is WDT#1 Reload reg.
-		 * WDT08 is WDT#1 counter restart reg to avoid system deadlock
-		 * WDT0C is WDT#1 control reg
-		 *	[6:5]:= 01:Full chip
-		 *	[4]:= 1:1MHz clock source
-		 *	[1]:= 1:WDT will be cleeared and disabled after timeout occurs
-		 *	[0]:= 1:WDT enable
-		 */
-		__ast_moutdwm(regs, 0x1E785004, 0x00000010);
-		__ast_moutdwm(regs, 0x1E785008, 0x00004755);
-		__ast_moutdwm(regs, 0x1E78500c, 0x00000033);
-		udelay(1000);
-	}
-
-	do {
-		__ast_moutdwm(regs, 0x1e6e2000, 0x1688A8A8);
-		data = __ast_mindwm(regs, 0x1e6e2000);
-	} while (data != 1);
-
-	__ast_moutdwm(regs, 0x1e6e207c, 0x08000000); /* clear fast reset */
-}
-
-void ast_post_chip_2500(struct ast_device *ast)
-{
-	struct drm_device *dev = &ast->base;
-	u32 temp;
-	u8 reg;
-
-	reg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd0, 0xff);
-	if ((reg & AST_IO_VGACRD0_VRAM_INIT_STATUS_MASK) == 0) {/* vga only */
-		/* Clear bus lock condition */
-		ast_patch_ahb_2500(ast->regs);
-
-		/* Disable watchdog */
-		ast_moutdwm(ast, 0x1E78502C, 0x00000000);
-		ast_moutdwm(ast, 0x1E78504C, 0x00000000);
-
-		/*
-		 * Reset USB port to patch USB unknown device issue
-		 * SCU90 is Multi-function Pin Control #5
-		 *	[29]:= 1:Enable USB2.0 Host port#1 (that the mutually shared USB2.0 Hub
-		 *				port).
-		 * SCU94 is Multi-function Pin Control #6
-		 *	[14:13]:= 1x:USB2.0 Host2 controller
-		 * SCU70 is Hardware Strap reg
-		 *	[23]:= 1:CLKIN is 25MHz and USBCK1 = 24/48 MHz (determined by
-		 *				[18]: 0(24)/1(48) MHz)
-		 * SCU7C is Write clear reg to SCU70
-		 *	[23]:= write 1 and then SCU70[23] will be clear as 0b.
-		 */
-		ast_moutdwm(ast, 0x1E6E2090, 0x20000000);
-		ast_moutdwm(ast, 0x1E6E2094, 0x00004000);
-		if (ast_mindwm(ast, 0x1E6E2070) & 0x00800000) {
-			ast_moutdwm(ast, 0x1E6E207C, 0x00800000);
-			mdelay(100);
-			ast_moutdwm(ast, 0x1E6E2070, 0x00800000);
-		}
-		/* Modify eSPI reset pin */
-		temp = ast_mindwm(ast, 0x1E6E2070);
-		if (temp & 0x02000000)
-			ast_moutdwm(ast, 0x1E6E207C, 0x00004000);
-
-		/* Slow down CPU/AHB CLK in VGA only mode */
-		temp = ast_read32(ast, 0x12008);
-		temp |= 0x73;
-		ast_write32(ast, 0x12008, temp);
-
-		if (!ast_dram_init_2500(ast))
-			drm_err(dev, "DRAM init failed !\n");
-
-		temp = ast_mindwm(ast, 0x1e6e2040);
-		ast_moutdwm(ast, 0x1e6e2040, temp | 0x40);
-	}
-
-	/* wait ready */
-	do {
-		reg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd0, 0xff);
-	} while ((reg & 0x40) == 0);
-}
-- 
2.50.0



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