drivers/gpu/drm/ast/ast_dp501.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0

 #include <linux/delay.h>
 #include <linux/firmware.h>
 #include <linux/module.h>

 #include "ast_drv.h"

 MODULE_FIRMWARE("ast_dp501_fw.bin");

 static void ast_release_firmware(void *data)
 {
 	struct ast_private *ast = data;

 	release_firmware(ast->dp501_fw);
 	ast->dp501_fw = NULL;
 }

 static int ast_load_dp501_microcode(struct drm_device *dev)
 {
 	struct ast_private *ast = to_ast_private(dev);
 	int ret;

 	ret = request_firmware(&ast->dp501_fw, "ast_dp501_fw.bin", dev->dev);
 	if (ret)
 		return ret;

 	return devm_add_action_or_reset(dev->dev, ast_release_firmware, ast);
 }

 static void send_ack(struct ast_private *ast)
 {
 	u8 sendack;
 	sendack = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9b, 0xff);
 	sendack |= 0x80;
 	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9b, 0x00, sendack);
 }

 static void send_nack(struct ast_private *ast)
 {
 	u8 sendack;
 	sendack = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9b, 0xff);
 	sendack &= ~0x80;
 	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9b, 0x00, sendack);
 }

 static bool wait_ack(struct ast_private *ast)
 {
 	u8 waitack;
 	u32 retry = 0;
 	do {
 		waitack = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd2, 0xff);
 		waitack &= 0x80;
 		udelay(100);
 	} while ((!waitack) && (retry++ < 1000));

 	if (retry < 1000)
 		return true;
 	else
 		return false;
 }

 static bool wait_nack(struct ast_private *ast)
 {
 	u8 waitack;
 	u32 retry = 0;
 	do {
 		waitack = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd2, 0xff);
 		waitack &= 0x80;
 		udelay(100);
 	} while ((waitack) && (retry++ < 1000));

 	if (retry < 1000)
 		return true;
 	else
 		return false;
 }

 static void set_cmd_trigger(struct ast_private *ast)
 {
 	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9b, ~0x40, 0x40);
 }

 static void clear_cmd_trigger(struct ast_private *ast)
 {
 	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9b, ~0x40, 0x00);
 }

 #if 0
 static bool wait_fw_ready(struct ast_private *ast)
 {
 	u8 waitready;
 	u32 retry = 0;
 	do {
 		waitready = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd2, 0xff);
 		waitready &= 0x40;
 		udelay(100);
 	} while ((!waitready) && (retry++ < 1000));

 	if (retry < 1000)
 		return true;
 	else
 		return false;
 }
 #endif

 static bool ast_write_cmd(struct drm_device *dev, u8 data)
 {
 	struct ast_private *ast = to_ast_private(dev);
 	int retry = 0;
 	if (wait_nack(ast)) {
 		send_nack(ast);
 		ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9a, 0x00, data);
 		send_ack(ast);
 		set_cmd_trigger(ast);
 		do {
 			if (wait_ack(ast)) {
 				clear_cmd_trigger(ast);
 				send_nack(ast);
 				return true;
 			}
 		} while (retry++ < 100);
 	}
 	clear_cmd_trigger(ast);
 	send_nack(ast);
 	return false;
 }

 static bool ast_write_data(struct drm_device *dev, u8 data)
 {
 	struct ast_private *ast = to_ast_private(dev);

 	if (wait_nack(ast)) {
 		send_nack(ast);
 		ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9a, 0x00, data);
 		send_ack(ast);
 		if (wait_ack(ast)) {
 			send_nack(ast);
 			return true;
 		}
 	}
 	send_nack(ast);
 	return false;
 }

 #if 0
 static bool ast_read_data(struct drm_device *dev, u8 *data)
 {
 	struct ast_private *ast = to_ast_private(dev);
 	u8 tmp;

 	*data = 0;

 	if (wait_ack(ast) == false)
 		return false;
 	tmp = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd3, 0xff);
 	*data = tmp;
 	if (wait_nack(ast) == false) {
 		send_nack(ast);
 		return false;
 	}
 	send_nack(ast);
 	return true;
 }

 static void clear_cmd(struct ast_private *ast)
 {
 	send_nack(ast);
 	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9a, 0x00, 0x00);
 }
 #endif

 void ast_set_dp501_video_output(struct drm_device *dev, u8 mode)
 {
 	ast_write_cmd(dev, 0x40);
 	ast_write_data(dev, mode);

 	msleep(10);
 }

 static u32 get_fw_base(struct ast_private *ast)
 {
 	return ast_mindwm(ast, 0x1e6e2104) & 0x7fffffff;
 }

 bool ast_backup_fw(struct drm_device *dev, u8 *addr, u32 size)
 {
 	struct ast_private *ast = to_ast_private(dev);
 	u32 i, data;
 	u32 boot_address;

 	if (ast->config_mode != ast_use_p2a)
 		return false;

 	data = ast_mindwm(ast, 0x1e6e2100) & 0x01;
 	if (data) {
 		boot_address = get_fw_base(ast);
 		for (i = 0; i < size; i += 4)
 			*(u32 *)(addr + i) = ast_mindwm(ast, boot_address + i);
 		return true;
 	}
 	return false;
 }

 static bool ast_launch_m68k(struct drm_device *dev)
 {
 	struct ast_private *ast = to_ast_private(dev);
 	u32 i, data, len = 0;
 	u32 boot_address;
 	u8 *fw_addr = NULL;
 	u8 jreg;

 	if (ast->config_mode != ast_use_p2a)
 		return false;

 	data = ast_mindwm(ast, 0x1e6e2100) & 0x01;
 	if (!data) {

 		if (ast->dp501_fw_addr) {
 			fw_addr = ast->dp501_fw_addr;
 			len = 32*1024;
 		} else {
 			if (!ast->dp501_fw &&
 			    ast_load_dp501_microcode(dev) < 0)
 				return false;

 			fw_addr = (u8 *)ast->dp501_fw->data;
 			len = ast->dp501_fw->size;
 		}
 		/* Get BootAddress */
 		ast_moutdwm(ast, 0x1e6e2000, 0x1688a8a8);
 		data = ast_mindwm(ast, 0x1e6e0004);
 		switch (data & 0x03) {
 		case 0:
 			boot_address = 0x44000000;
 			break;
 		default:
 		case 1:
 			boot_address = 0x48000000;
 			break;
 		case 2:
 			boot_address = 0x50000000;
 			break;
 		case 3:
 			boot_address = 0x60000000;
 			break;
 		}
 		boot_address -= 0x200000; /* -2MB */

 		/* copy image to buffer */
 		for (i = 0; i < len; i += 4) {
 			data = *(u32 *)(fw_addr + i);
 			ast_moutdwm(ast, boot_address + i, data);
 		}

 		/* Init SCU */
 		ast_moutdwm(ast, 0x1e6e2000, 0x1688a8a8);

 		/* Launch FW */
 		ast_moutdwm(ast, 0x1e6e2104, 0x80000000 + boot_address);
 		ast_moutdwm(ast, 0x1e6e2100, 1);

 		/* Update Scratch */
 		data = ast_mindwm(ast, 0x1e6e2040) & 0xfffff1ff;		/* D[11:9] = 100b: UEFI handling */
 		data |= 0x800;
 		ast_moutdwm(ast, 0x1e6e2040, data);

 		jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x99, 0xfc); /* D[1:0]: Reserved Video Buffer */
 		jreg |= 0x02;
 		ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x99, jreg);
 	}
 	return true;
 }

 u8 ast_get_dp501_max_clk(struct drm_device *dev)
 {
 	struct ast_private *ast = to_ast_private(dev);
 	u32 boot_address, offset, data;
 	u8 linkcap[4], linkrate, linklanes, maxclk = 0xff;
 	u32 *plinkcap;

 	if (ast->config_mode == ast_use_p2a) {
 		boot_address = get_fw_base(ast);

 		/* validate FW version */
 		offset = AST_DP501_GBL_VERSION;
 		data = ast_mindwm(ast, boot_address + offset);
 		if ((data & AST_DP501_FW_VERSION_MASK) != AST_DP501_FW_VERSION_1) /* version: 1x */
 			return maxclk;

 		/* Read Link Capability */
 		offset  = AST_DP501_LINKRATE;
 		plinkcap = (u32 *)linkcap;
 		*plinkcap  = ast_mindwm(ast, boot_address + offset);
 		if (linkcap[2] == 0) {
 			linkrate = linkcap[0];
 			linklanes = linkcap[1];
 			data = (linkrate == 0x0a) ? (90 * linklanes) : (54 * linklanes);
 			if (data > 0xff)
 				data = 0xff;
 			maxclk = (u8)data;
 		}
 	} else {
 		if (!ast->dp501_fw_buf)
 			return AST_DP501_DEFAULT_DCLK;	/* 1024x768 as default */

 		/* dummy read */
 		offset = 0x0000;
 		data = readl(ast->dp501_fw_buf + offset);

 		/* validate FW version */
 		offset = AST_DP501_GBL_VERSION;
 		data = readl(ast->dp501_fw_buf + offset);
 		if ((data & AST_DP501_FW_VERSION_MASK) != AST_DP501_FW_VERSION_1) /* version: 1x */
 			return maxclk;

 		/* Read Link Capability */
 		offset = AST_DP501_LINKRATE;
 		plinkcap = (u32 *)linkcap;
 		*plinkcap = readl(ast->dp501_fw_buf + offset);
 		if (linkcap[2] == 0) {
 			linkrate = linkcap[0];
 			linklanes = linkcap[1];
 			data = (linkrate == 0x0a) ? (90 * linklanes) : (54 * linklanes);
 			if (data > 0xff)
 				data = 0xff;
 			maxclk = (u8)data;
 		}
 	}
 	return maxclk;
 }

 bool ast_dp501_read_edid(struct drm_device *dev, u8 *ediddata)
 {
 	struct ast_private *ast = to_ast_private(dev);
 	u32 i, boot_address, offset, data;
 	u32 *pEDIDidx;

 	if (ast->config_mode == ast_use_p2a) {
 		boot_address = get_fw_base(ast);

 		/* validate FW version */
 		offset = AST_DP501_GBL_VERSION;
 		data = ast_mindwm(ast, boot_address + offset);
 		if ((data & AST_DP501_FW_VERSION_MASK) != AST_DP501_FW_VERSION_1)
 			return false;

 		/* validate PnP Monitor */
 		offset = AST_DP501_PNPMONITOR;
 		data = ast_mindwm(ast, boot_address + offset);
 		if (!(data & AST_DP501_PNP_CONNECTED))
 			return false;

 		/* Read EDID */
 		offset = AST_DP501_EDID_DATA;
 		for (i = 0; i < 128; i += 4) {
 			data = ast_mindwm(ast, boot_address + offset + i);
 			pEDIDidx = (u32 *)(ediddata + i);
 			*pEDIDidx = data;
 		}
 	} else {
 		if (!ast->dp501_fw_buf)
 			return false;

 		/* dummy read */
 		offset = 0x0000;
 		data = readl(ast->dp501_fw_buf + offset);

 		/* validate FW version */
 		offset = AST_DP501_GBL_VERSION;
 		data = readl(ast->dp501_fw_buf + offset);
 		if ((data & AST_DP501_FW_VERSION_MASK) != AST_DP501_FW_VERSION_1)
 			return false;

 		/* validate PnP Monitor */
 		offset = AST_DP501_PNPMONITOR;
 		data = readl(ast->dp501_fw_buf + offset);
 		if (!(data & AST_DP501_PNP_CONNECTED))
 			return false;

 		/* Read EDID */
 		offset = AST_DP501_EDID_DATA;
 		for (i = 0; i < 128; i += 4) {
 			data = readl(ast->dp501_fw_buf + offset + i);
 			pEDIDidx = (u32 *)(ediddata + i);
 			*pEDIDidx = data;
 		}
 	}

 	return true;
 }

 static bool ast_init_dvo(struct drm_device *dev)
 {
 	struct ast_private *ast = to_ast_private(dev);
 	u8 jreg;
 	u32 data;
 	ast_write32(ast, 0xf004, 0x1e6e0000);
 	ast_write32(ast, 0xf000, 0x1);
 	ast_write32(ast, 0x12000, 0x1688a8a8);

 	jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff);
 	if (!(jreg & 0x80)) {
 		/* Init SCU DVO Settings */
 		data = ast_read32(ast, 0x12008);
 		/* delay phase */
 		data &= 0xfffff8ff;
 		data |= 0x00000500;
 		ast_write32(ast, 0x12008, data);

 		if (ast->chip == AST2300) {
 			data = ast_read32(ast, 0x12084);
 			/* multi-pins for DVO single-edge */
 			data |= 0xfffe0000;
 			ast_write32(ast, 0x12084, data);

 			data = ast_read32(ast, 0x12088);
 			/* multi-pins for DVO single-edge */
 			data |= 0x000fffff;
 			ast_write32(ast, 0x12088, data);

 			data = ast_read32(ast, 0x12090);
 			/* multi-pins for DVO single-edge */
 			data &= 0xffffffcf;
 			data |= 0x00000020;
 			ast_write32(ast, 0x12090, data);
 		} else { /* AST2400 */
 			data = ast_read32(ast, 0x12088);
 			/* multi-pins for DVO single-edge */
 			data |= 0x30000000;
 			ast_write32(ast, 0x12088, data);

 			data = ast_read32(ast, 0x1208c);
 			/* multi-pins for DVO single-edge */
 			data |= 0x000000cf;
 			ast_write32(ast, 0x1208c, data);

 			data = ast_read32(ast, 0x120a4);
 			/* multi-pins for DVO single-edge */
 			data |= 0xffff0000;
 			ast_write32(ast, 0x120a4, data);

 			data = ast_read32(ast, 0x120a8);
 			/* multi-pins for DVO single-edge */
 			data |= 0x0000000f;
 			ast_write32(ast, 0x120a8, data);

 			data = ast_read32(ast, 0x12094);
 			/* multi-pins for DVO single-edge */
 			data |= 0x00000002;
 			ast_write32(ast, 0x12094, data);
 		}
 	}

 	/* Force to DVO */
 	data = ast_read32(ast, 0x1202c);
 	data &= 0xfffbffff;
 	ast_write32(ast, 0x1202c, data);

 	/* Init VGA DVO Settings */
 	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xcf, 0x80);
 	return true;
 }


 static void ast_init_analog(struct drm_device *dev)
 {
 	struct ast_private *ast = to_ast_private(dev);
 	u32 data;

 	/*
 	 * Set DAC source to VGA mode in SCU2C via the P2A
 	 * bridge. First configure the P2U to target the SCU
 	 * in case it isn't at this stage.
 	 */
 	ast_write32(ast, 0xf004, 0x1e6e0000);
 	ast_write32(ast, 0xf000, 0x1);

 	/* Then unlock the SCU with the magic password */
 	ast_write32(ast, 0x12000, 0x1688a8a8);
 	ast_write32(ast, 0x12000, 0x1688a8a8);
 	ast_write32(ast, 0x12000, 0x1688a8a8);

 	/* Finally, clear bits [17:16] of SCU2c */
 	data = ast_read32(ast, 0x1202c);
 	data &= 0xfffcffff;
 	ast_write32(ast, 0, data);

 	/* Disable DVO */
 	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xcf, 0x00);
 }

 void ast_init_3rdtx(struct drm_device *dev)
 {
 	struct ast_private *ast = to_ast_private(dev);
 	u8 jreg;

 	if (ast->chip == AST2300 || ast->chip == AST2400) {
 		jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
 		switch (jreg & 0x0e) {
 		case 0x04:
 			ast_init_dvo(dev);
 			break;
 		case 0x08:
 			ast_launch_m68k(dev);
 			break;
 		case 0x0c:
 			ast_init_dvo(dev);
 			break;
 		default:
 			if (ast->tx_chip_type == AST_TX_SIL164)
 				ast_init_dvo(dev);
 			else
 				ast_init_analog(dev);
 		}
 	}
 }
	// SPDX-License-Identifier: GPL-2.0

	#include <linux/delay.h>
	#include <linux/firmware.h>
	#include <linux/module.h>

	#include "ast_drv.h"

	MODULE_FIRMWARE("ast_dp501_fw.bin");

	static void ast_release_firmware(void *data)
	{
	struct ast_private *ast = data;

	release_firmware(ast->dp501_fw);
	ast->dp501_fw = NULL;
	}

	static int ast_load_dp501_microcode(struct drm_device *dev)
	{
	struct ast_private *ast = to_ast_private(dev);
	int ret;

	ret = request_firmware(&ast->dp501_fw, "ast_dp501_fw.bin", dev->dev);
	if (ret)
	return ret;

	return devm_add_action_or_reset(dev->dev, ast_release_firmware, ast);
	}

	static void send_ack(struct ast_private *ast)
	{
	u8 sendack;
	sendack = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9b, 0xff);
	sendack \|= 0x80;
	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9b, 0x00, sendack);
	}

	static void send_nack(struct ast_private *ast)
	{
	u8 sendack;
	sendack = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9b, 0xff);
	sendack &= ~0x80;
	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9b, 0x00, sendack);
	}

	static bool wait_ack(struct ast_private *ast)
	{
	u8 waitack;
	u32 retry = 0;
	do {
	waitack = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd2, 0xff);
	waitack &= 0x80;
	udelay(100);
	} while ((!waitack) && (retry++ < 1000));

	if (retry < 1000)
	return true;
	else
	return false;
	}

	static bool wait_nack(struct ast_private *ast)
	{
	u8 waitack;
	u32 retry = 0;
	do {
	waitack = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd2, 0xff);
	waitack &= 0x80;
	udelay(100);
	} while ((waitack) && (retry++ < 1000));

	if (retry < 1000)
	return true;
	else
	return false;
	}

	static void set_cmd_trigger(struct ast_private *ast)
	{
	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9b, ~0x40, 0x40);
	}

	static void clear_cmd_trigger(struct ast_private *ast)
	{
	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9b, ~0x40, 0x00);
	}

	#if 0
	static bool wait_fw_ready(struct ast_private *ast)
	{
	u8 waitready;
	u32 retry = 0;
	do {
	waitready = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd2, 0xff);
	waitready &= 0x40;
	udelay(100);
	} while ((!waitready) && (retry++ < 1000));

	if (retry < 1000)
	return true;
	else
	return false;
	}
	#endif

	static bool ast_write_cmd(struct drm_device *dev, u8 data)
	{
	struct ast_private *ast = to_ast_private(dev);
	int retry = 0;
	if (wait_nack(ast)) {
	send_nack(ast);
	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9a, 0x00, data);
	send_ack(ast);
	set_cmd_trigger(ast);
	do {
	if (wait_ack(ast)) {
	clear_cmd_trigger(ast);
	send_nack(ast);
	return true;
	}
	} while (retry++ < 100);
	}
	clear_cmd_trigger(ast);
	send_nack(ast);
	return false;
	}

	static bool ast_write_data(struct drm_device *dev, u8 data)
	{
	struct ast_private *ast = to_ast_private(dev);

	if (wait_nack(ast)) {
	send_nack(ast);
	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9a, 0x00, data);
	send_ack(ast);
	if (wait_ack(ast)) {
	send_nack(ast);
	return true;
	}
	}
	send_nack(ast);
	return false;
	}

	#if 0
	static bool ast_read_data(struct drm_device dev, u8 data)
	{
	struct ast_private *ast = to_ast_private(dev);
	u8 tmp;

	*data = 0;

	if (wait_ack(ast) == false)
	return false;
	tmp = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd3, 0xff);
	*data = tmp;
	if (wait_nack(ast) == false) {
	send_nack(ast);
	return false;
	}
	send_nack(ast);
	return true;
	}

	static void clear_cmd(struct ast_private *ast)
	{
	send_nack(ast);
	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x9a, 0x00, 0x00);
	}
	#endif

	void ast_set_dp501_video_output(struct drm_device *dev, u8 mode)
	{
	ast_write_cmd(dev, 0x40);
	ast_write_data(dev, mode);

	msleep(10);
	}

	static u32 get_fw_base(struct ast_private *ast)
	{
	return ast_mindwm(ast, 0x1e6e2104) & 0x7fffffff;
	}

	bool ast_backup_fw(struct drm_device dev, u8 addr, u32 size)
	{
	struct ast_private *ast = to_ast_private(dev);
	u32 i, data;
	u32 boot_address;

	if (ast->config_mode != ast_use_p2a)
	return false;

	data = ast_mindwm(ast, 0x1e6e2100) & 0x01;
	if (data) {
	boot_address = get_fw_base(ast);
	for (i = 0; i < size; i += 4)
	(u32 )(addr + i) = ast_mindwm(ast, boot_address + i);
	return true;
	}
	return false;
	}

	static bool ast_launch_m68k(struct drm_device *dev)
	{
	struct ast_private *ast = to_ast_private(dev);
	u32 i, data, len = 0;
	u32 boot_address;
	u8 *fw_addr = NULL;
	u8 jreg;

	if (ast->config_mode != ast_use_p2a)
	return false;

	data = ast_mindwm(ast, 0x1e6e2100) & 0x01;
	if (!data) {

	if (ast->dp501_fw_addr) {
	fw_addr = ast->dp501_fw_addr;
	len = 32*1024;
	} else {
	if (!ast->dp501_fw &&
	ast_load_dp501_microcode(dev) < 0)
	return false;

	fw_addr = (u8 *)ast->dp501_fw->data;
	len = ast->dp501_fw->size;
	}
	/* Get BootAddress */
	ast_moutdwm(ast, 0x1e6e2000, 0x1688a8a8);
	data = ast_mindwm(ast, 0x1e6e0004);
	switch (data & 0x03) {
	case 0:
	boot_address = 0x44000000;
	break;
	default:
	case 1:
	boot_address = 0x48000000;
	break;
	case 2:
	boot_address = 0x50000000;
	break;
	case 3:
	boot_address = 0x60000000;
	break;
	}
	boot_address -= 0x200000; /* -2MB */

	/* copy image to buffer */
	for (i = 0; i < len; i += 4) {
	data = (u32 )(fw_addr + i);
	ast_moutdwm(ast, boot_address + i, data);
	}

	/* Init SCU */
	ast_moutdwm(ast, 0x1e6e2000, 0x1688a8a8);

	/* Launch FW */
	ast_moutdwm(ast, 0x1e6e2104, 0x80000000 + boot_address);
	ast_moutdwm(ast, 0x1e6e2100, 1);

	/* Update Scratch */
	data = ast_mindwm(ast, 0x1e6e2040) & 0xfffff1ff; /* D[11:9] = 100b: UEFI handling */
	data \|= 0x800;
	ast_moutdwm(ast, 0x1e6e2040, data);

	jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x99, 0xfc); /* D[1:0]: Reserved Video Buffer */
	jreg \|= 0x02;
	ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x99, jreg);
	}
	return true;
	}

	u8 ast_get_dp501_max_clk(struct drm_device *dev)
	{
	struct ast_private *ast = to_ast_private(dev);
	u32 boot_address, offset, data;
	u8 linkcap[4], linkrate, linklanes, maxclk = 0xff;
	u32 *plinkcap;

	if (ast->config_mode == ast_use_p2a) {
	boot_address = get_fw_base(ast);

	/* validate FW version */
	offset = AST_DP501_GBL_VERSION;
	data = ast_mindwm(ast, boot_address + offset);
	if ((data & AST_DP501_FW_VERSION_MASK) != AST_DP501_FW_VERSION_1) /* version: 1x */
	return maxclk;

	/* Read Link Capability */
	offset = AST_DP501_LINKRATE;
	plinkcap = (u32 *)linkcap;
	*plinkcap = ast_mindwm(ast, boot_address + offset);
	if (linkcap[2] == 0) {
	linkrate = linkcap[0];
	linklanes = linkcap[1];
	data = (linkrate == 0x0a) ? (90 * linklanes) : (54 * linklanes);
	if (data > 0xff)
	data = 0xff;
	maxclk = (u8)data;
	}
	} else {
	if (!ast->dp501_fw_buf)
	return AST_DP501_DEFAULT_DCLK; /* 1024x768 as default */

	/* dummy read */
	offset = 0x0000;
	data = readl(ast->dp501_fw_buf + offset);

	/* validate FW version */
	offset = AST_DP501_GBL_VERSION;
	data = readl(ast->dp501_fw_buf + offset);
	if ((data & AST_DP501_FW_VERSION_MASK) != AST_DP501_FW_VERSION_1) /* version: 1x */
	return maxclk;

	/* Read Link Capability */
	offset = AST_DP501_LINKRATE;
	plinkcap = (u32 *)linkcap;
	*plinkcap = readl(ast->dp501_fw_buf + offset);
	if (linkcap[2] == 0) {
	linkrate = linkcap[0];
	linklanes = linkcap[1];
	data = (linkrate == 0x0a) ? (90 * linklanes) : (54 * linklanes);
	if (data > 0xff)
	data = 0xff;
	maxclk = (u8)data;
	}
	}
	return maxclk;
	}

	bool ast_dp501_read_edid(struct drm_device dev, u8 ediddata)
	{
	struct ast_private *ast = to_ast_private(dev);
	u32 i, boot_address, offset, data;
	u32 *pEDIDidx;

	if (ast->config_mode == ast_use_p2a) {
	boot_address = get_fw_base(ast);

	/* validate FW version */
	offset = AST_DP501_GBL_VERSION;
	data = ast_mindwm(ast, boot_address + offset);
	if ((data & AST_DP501_FW_VERSION_MASK) != AST_DP501_FW_VERSION_1)
	return false;

	/* validate PnP Monitor */
	offset = AST_DP501_PNPMONITOR;
	data = ast_mindwm(ast, boot_address + offset);
	if (!(data & AST_DP501_PNP_CONNECTED))
	return false;

	/* Read EDID */
	offset = AST_DP501_EDID_DATA;
	for (i = 0; i < 128; i += 4) {
	data = ast_mindwm(ast, boot_address + offset + i);
	pEDIDidx = (u32 *)(ediddata + i);
	*pEDIDidx = data;
	}
	} else {
	if (!ast->dp501_fw_buf)
	return false;

	/* dummy read */
	offset = 0x0000;
	data = readl(ast->dp501_fw_buf + offset);

	/* validate FW version */
	offset = AST_DP501_GBL_VERSION;
	data = readl(ast->dp501_fw_buf + offset);
	if ((data & AST_DP501_FW_VERSION_MASK) != AST_DP501_FW_VERSION_1)
	return false;

	/* validate PnP Monitor */
	offset = AST_DP501_PNPMONITOR;
	data = readl(ast->dp501_fw_buf + offset);
	if (!(data & AST_DP501_PNP_CONNECTED))
	return false;

	/* Read EDID */
	offset = AST_DP501_EDID_DATA;
	for (i = 0; i < 128; i += 4) {
	data = readl(ast->dp501_fw_buf + offset + i);
	pEDIDidx = (u32 *)(ediddata + i);
	*pEDIDidx = data;
	}
	}

	return true;
	}

	static bool ast_init_dvo(struct drm_device *dev)
	{
	struct ast_private *ast = to_ast_private(dev);
	u8 jreg;
	u32 data;
	ast_write32(ast, 0xf004, 0x1e6e0000);
	ast_write32(ast, 0xf000, 0x1);
	ast_write32(ast, 0x12000, 0x1688a8a8);

	jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff);
	if (!(jreg & 0x80)) {
	/* Init SCU DVO Settings */
	data = ast_read32(ast, 0x12008);
	/* delay phase */
	data &= 0xfffff8ff;
	data \|= 0x00000500;
	ast_write32(ast, 0x12008, data);

	if (ast->chip == AST2300) {
	data = ast_read32(ast, 0x12084);
	/* multi-pins for DVO single-edge */
	data \|= 0xfffe0000;
	ast_write32(ast, 0x12084, data);

	data = ast_read32(ast, 0x12088);
	/* multi-pins for DVO single-edge */
	data \|= 0x000fffff;
	ast_write32(ast, 0x12088, data);

	data = ast_read32(ast, 0x12090);
	/* multi-pins for DVO single-edge */
	data &= 0xffffffcf;
	data \|= 0x00000020;
	ast_write32(ast, 0x12090, data);
	} else { /* AST2400 */
	data = ast_read32(ast, 0x12088);
	/* multi-pins for DVO single-edge */
	data \|= 0x30000000;
	ast_write32(ast, 0x12088, data);

	data = ast_read32(ast, 0x1208c);
	/* multi-pins for DVO single-edge */
	data \|= 0x000000cf;
	ast_write32(ast, 0x1208c, data);

	data = ast_read32(ast, 0x120a4);
	/* multi-pins for DVO single-edge */
	data \|= 0xffff0000;
	ast_write32(ast, 0x120a4, data);

	data = ast_read32(ast, 0x120a8);
	/* multi-pins for DVO single-edge */
	data \|= 0x0000000f;
	ast_write32(ast, 0x120a8, data);

	data = ast_read32(ast, 0x12094);
	/* multi-pins for DVO single-edge */
	data \|= 0x00000002;
	ast_write32(ast, 0x12094, data);
	}
	}

	/* Force to DVO */
	data = ast_read32(ast, 0x1202c);
	data &= 0xfffbffff;
	ast_write32(ast, 0x1202c, data);

	/* Init VGA DVO Settings */
	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xcf, 0x80);
	return true;
	}


	static void ast_init_analog(struct drm_device *dev)
	{
	struct ast_private *ast = to_ast_private(dev);
	u32 data;

	/*
	* Set DAC source to VGA mode in SCU2C via the P2A
	* bridge. First configure the P2U to target the SCU
	* in case it isn't at this stage.
	*/
	ast_write32(ast, 0xf004, 0x1e6e0000);
	ast_write32(ast, 0xf000, 0x1);

	/* Then unlock the SCU with the magic password */
	ast_write32(ast, 0x12000, 0x1688a8a8);
	ast_write32(ast, 0x12000, 0x1688a8a8);
	ast_write32(ast, 0x12000, 0x1688a8a8);

	/* Finally, clear bits [17:16] of SCU2c */
	data = ast_read32(ast, 0x1202c);
	data &= 0xfffcffff;
	ast_write32(ast, 0, data);

	/* Disable DVO */
	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xcf, 0x00);
	}

	void ast_init_3rdtx(struct drm_device *dev)
	{
	struct ast_private *ast = to_ast_private(dev);
	u8 jreg;

	if (ast->chip == AST2300 \|\| ast->chip == AST2400) {
	jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
	switch (jreg & 0x0e) {
	case 0x04:
	ast_init_dvo(dev);
	break;
	case 0x08:
	ast_launch_m68k(dev);
	break;
	case 0x0c:
	ast_init_dvo(dev);
	break;
	default:
	if (ast->tx_chip_type == AST_TX_SIL164)
	ast_init_dvo(dev);
	else
	ast_init_analog(dev);
	}
	}
	}