radeon_monitor.c

优龙2410linux2.6.8内核源代码

#include "radeonfb.h"
#include "../edid.h"

#ifdef CONFIG_PPC_OF
#include <asm/prom.h>
#include <asm/pci-bridge.h>
#endif /* CONFIG_PPC_OF */

static struct fb_var_screeninfo radeonfb_default_var = {
        640, 480, 640, 480, 0, 0, 8, 0,
        {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
        0, 0, -1, -1, 0, 39721, 40, 24, 32, 11, 96, 2,
        0, FB_VMODE_NONINTERLACED
};

static char *radeon_get_mon_name(int type)
{
	char *pret = NULL;

	switch (type) {
		case MT_NONE:
			pret = "no";
			break;
		case MT_CRT:
			pret = "CRT";
			break;
		case MT_DFP:
			pret = "DFP";
			break;
		case MT_LCD:
			pret = "LCD";
			break;
		case MT_CTV:
			pret = "CTV";
			break;
		case MT_STV:
			pret = "STV";
			break;
	}

	return pret;
}


#ifdef CONFIG_PPC_OF
/*
 * Try to find monitor informations & EDID data out of the Open Firmware
 * device-tree. This also contains some "hacks" to work around a few machine
 * models with broken OF probing by hard-coding known EDIDs for some Mac
 * laptops internal LVDS panel. (XXX: not done yet)
 */
static int __devinit radeon_parse_montype_prop(struct device_node *dp, u8 **out_EDID, int hdno)
{
        static char *propnames[] = { "DFP,EDID", "LCD,EDID", "EDID", "EDID1", "EDID2",  NULL };
	u8 *pedid = NULL;
	u8 *pmt = NULL;
	u8 *tmp;
        int i, mt;  
	
	RTRACE("analyzing OF properties...\n");
	pmt = (u8 *)get_property(dp, "display-type", NULL);
	if (!pmt)
		return MT_NONE;
	RTRACE("display-type: %s\n", pmt);
	/* OF says "LCD" for DFP as well, we discriminate from the caller of this
	 * function
	 */
	if (!strcmp(pmt, "LCD") || !strcmp(pmt, "DFP"))
		mt = MT_DFP;
	else if (!strcmp(pmt, "CRT"))
		mt = MT_CRT;
	else if (strcmp(pmt, "NONE")) {
		printk(KERN_WARNING "radeonfb: Unknown OF display-type: %s\n", pmt);
		return MT_NONE;
	}
	for (i = 0; propnames[i] != NULL; ++i) {
		pedid = (u8 *)get_property(dp, propnames[i], NULL);
		if (pedid != NULL)
			break;
	}
	/* We didn't find the EDID in the leaf node, some cards will actually
	 * put EDID1/EDID2 in the parent, look for these (typically M6 tipb).
	 * single-head cards have hdno == -1 and skip this step
	 */
	if (pedid == NULL && dp->parent && (hdno != -1))
		pedid = get_property(dp->parent, (hdno == 0) ? "EDID1" : "EDID2", NULL);
	if (pedid == NULL && dp->parent && (hdno == 0))
		pedid = get_property(dp->parent, "EDID", NULL);
	if (pedid == NULL)
		return mt;

	tmp = (u8 *)kmalloc(EDID_LENGTH, GFP_KERNEL);
	if (!tmp)
		return mt;
	memcpy(tmp, pedid, EDID_LENGTH);
	*out_EDID = tmp;
	return mt;
}

static int __devinit radeon_probe_OF_head(struct radeonfb_info *rinfo, int head_no,
					  u8 **out_EDID)
{
        struct device_node *dp;

	RTRACE("radeon_probe_OF_head\n");

        dp = pci_device_to_OF_node(rinfo->pdev);
        while (dp == NULL)
		return MT_NONE;

	if (rinfo->has_CRTC2) {
		char *pname;
		int len, second = 0;

		dp = dp->child;
		do {
			if (!dp)
				return MT_NONE;
			pname = (char *)get_property(dp, "name", NULL);
			if (!pname)
				return MT_NONE;
			len = strlen(pname);
			RTRACE("head: %s (letter: %c, head_no: %d)\n",
			       pname, pname[len-1], head_no);
			if (pname[len-1] == 'A' && head_no == 0) {
				int mt = radeon_parse_montype_prop(dp, out_EDID, 0);
				/* Maybe check for LVDS_GEN_CNTL here ? I need to check out
				 * what OF does when booting with lid closed
				 */
				if (mt == MT_DFP && rinfo->is_mobility)
					mt = MT_LCD;
				return mt;
			} else if (pname[len-1] == 'B' && head_no == 1)
				return radeon_parse_montype_prop(dp, out_EDID, 1);
			second = 1;
			dp = dp->sibling;
		} while(!second);
	} else {
		if (head_no > 0)
			return MT_NONE;
		return radeon_parse_montype_prop(dp, out_EDID, -1);
	}
        return MT_NONE;
}
#endif /* CONFIG_PPC_OF */


static int __devinit radeon_get_panel_info_BIOS(struct radeonfb_info *rinfo)
{
	unsigned long tmp, tmp0;
	char stmp[30];
	int i;

	if (!rinfo->bios_seg)
		return 0;

	if (!(tmp = BIOS_IN16(rinfo->fp_bios_start + 0x40))) {
		printk(KERN_ERR "radeonfb: Failed to detect DFP panel info using BIOS\n");
		rinfo->panel_info.pwr_delay = 200;
		return 0;
	}

	for(i=0; i<24; i++)
		stmp[i] = BIOS_IN8(tmp+i+1);
	stmp[24] = 0;
	printk("radeonfb: panel ID string: %s\n", stmp);
	rinfo->panel_info.xres = BIOS_IN16(tmp + 25);
	rinfo->panel_info.yres = BIOS_IN16(tmp + 27);
	printk("radeonfb: detected LVDS panel size from BIOS: %dx%d\n",
		rinfo->panel_info.xres, rinfo->panel_info.yres);

	rinfo->panel_info.pwr_delay = BIOS_IN16(tmp + 44);
	RTRACE("BIOS provided panel power delay: %d\n", rinfo->panel_info.pwr_delay);
	if (rinfo->panel_info.pwr_delay > 2000 || rinfo->panel_info.pwr_delay <= 0)
		rinfo->panel_info.pwr_delay = 2000;

	/*
	 * Some panels only work properly with some divider combinations
	 */
	rinfo->panel_info.ref_divider = BIOS_IN16(tmp + 46);
	rinfo->panel_info.post_divider = BIOS_IN8(tmp + 48);
	rinfo->panel_info.fbk_divider = BIOS_IN16(tmp + 49);
	if (rinfo->panel_info.ref_divider != 0 &&
	    rinfo->panel_info.fbk_divider > 3) {
		rinfo->panel_info.use_bios_dividers = 1;
		printk(KERN_INFO "radeondb: BIOS provided dividers will be used\n");
		RTRACE("ref_divider = %x\n", rinfo->panel_info.ref_divider);
		RTRACE("post_divider = %x\n", rinfo->panel_info.post_divider);
		RTRACE("fbk_divider = %x\n", rinfo->panel_info.fbk_divider);
	}
	RTRACE("Scanning BIOS table ...\n");
	for(i=0; i<32; i++) {
		tmp0 = BIOS_IN16(tmp+64+i*2);
		if (tmp0 == 0)
			break;
		RTRACE(" %d x %d\n", BIOS_IN16(tmp0), BIOS_IN16(tmp0+2));
		if ((BIOS_IN16(tmp0) == rinfo->panel_info.xres) &&
		    (BIOS_IN16(tmp0+2) == rinfo->panel_info.yres)) {
			rinfo->panel_info.hblank = (BIOS_IN16(tmp0+17) - BIOS_IN16(tmp0+19)) * 8;
			rinfo->panel_info.hOver_plus = ((BIOS_IN16(tmp0+21) -
							 BIOS_IN16(tmp0+19) -1) * 8) & 0x7fff;
			rinfo->panel_info.hSync_width = BIOS_IN8(tmp0+23) * 8;
			rinfo->panel_info.vblank = BIOS_IN16(tmp0+24) - BIOS_IN16(tmp0+26);
			rinfo->panel_info.vOver_plus = (BIOS_IN16(tmp0+28) & 0x7ff) - BIOS_IN16(tmp0+26);
			rinfo->panel_info.vSync_width = (BIOS_IN16(tmp0+28) & 0xf800) >> 11;
			rinfo->panel_info.clock = BIOS_IN16(tmp0+9);
			/* Assume high active syncs for now until ATI tells me more... maybe we
			 * can probe register values here ?
			 */
			rinfo->panel_info.hAct_high = 1;
			rinfo->panel_info.vAct_high = 1;
			/* Mark panel infos valid */
			rinfo->panel_info.valid = 1;

			RTRACE("Found panel in BIOS table:\n");
			RTRACE("  hblank: %d\n", rinfo->panel_info.hblank);
			RTRACE("  hOver_plus: %d\n", rinfo->panel_info.hOver_plus);
			RTRACE("  hSync_width: %d\n", rinfo->panel_info.hSync_width);
			RTRACE("  vblank: %d\n", rinfo->panel_info.vblank);
			RTRACE("  vOver_plus: %d\n", rinfo->panel_info.vOver_plus);
			RTRACE("  vSync_width: %d\n", rinfo->panel_info.vSync_width);
			RTRACE("  clock: %d\n", rinfo->panel_info.clock);
				
			return 1;
		}
	}
	RTRACE("Didn't find panel in BIOS table !\n");

	return 0;
}

/* Try to extract the connector informations from the BIOS. This
 * doesn't quite work yet, but it's output is still useful for
 * debugging
 */
static void __devinit radeon_parse_connector_info(struct radeonfb_info *rinfo)
{
	int offset, chips, connectors, tmp, i, conn, type;

	static char* __conn_type_table[16] = {
		"NONE", "Proprietary", "CRT", "DVI-I", "DVI-D", "Unknown", "Unknown",
		"Unknown", "Unknown", "Unknown", "Unknown", "Unknown", "Unknown",
		"Unknown", "Unknown", "Unknown"
	};

	if (!rinfo->bios_seg)
		return;

	offset = BIOS_IN16(rinfo->fp_bios_start + 0x50);
	if (offset == 0) {
		printk(KERN_WARNING "radeonfb: No connector info table detected\n");
		return;
	}

	/* Don't do much more at this point but displaying the data if
	 * DEBUG is enabled
	 */
	chips = BIOS_IN8(offset++) >> 4;
	RTRACE("%d chips in connector info\n", chips);
	for (i = 0; i < chips; i++) {
		tmp = BIOS_IN8(offset++);
		connectors = tmp & 0x0f;
		RTRACE(" - chip %d has %d connectors\n", tmp >> 4, connectors);
		for (conn = 0; ; conn++) {
			tmp = BIOS_IN16(offset);
			if (tmp == 0)
				break;
			offset += 2;
			type = (tmp >> 12) & 0x0f;
			RTRACE("  * connector %d of type %d (%s) : %04x\n",
			       conn, type, __conn_type_table[type], tmp);
		}
	}
}


/*
 * Probe physical connection of a CRT. This code comes from XFree
 * as well and currently is only implemented for the CRT DAC, the
 * code for the TVDAC is commented out in XFree as "non working"
 */
static int __devinit radeon_crt_is_connected(struct radeonfb_info *rinfo, int is_crt_dac)
{
    int	          connected = 0;

    /* the monitor either wasn't connected or it is a non-DDC CRT.
     * try to probe it
     */
    if (is_crt_dac) {
	unsigned long ulOrigVCLK_ECP_CNTL;
	unsigned long ulOrigDAC_CNTL;
	unsigned long ulOrigDAC_EXT_CNTL;
	unsigned long ulOrigCRTC_EXT_CNTL;
	unsigned long ulData;
	unsigned long ulMask;

	ulOrigVCLK_ECP_CNTL = INPLL(VCLK_ECP_CNTL);

	ulData              = ulOrigVCLK_ECP_CNTL;
	ulData             &= ~(PIXCLK_ALWAYS_ONb
				| PIXCLK_DAC_ALWAYS_ONb);
	ulMask              = ~(PIXCLK_ALWAYS_ONb
				| PIXCLK_DAC_ALWAYS_ONb);
	OUTPLLP(VCLK_ECP_CNTL, ulData, ulMask);

	ulOrigCRTC_EXT_CNTL = INREG(CRTC_EXT_CNTL);
	ulData              = ulOrigCRTC_EXT_CNTL;
	ulData             |= CRTC_CRT_ON;
	OUTREG(CRTC_EXT_CNTL, ulData);
   
	ulOrigDAC_EXT_CNTL = INREG(DAC_EXT_CNTL);
	ulData             = ulOrigDAC_EXT_CNTL;
	ulData            &= ~DAC_FORCE_DATA_MASK;
	ulData            |=  (DAC_FORCE_BLANK_OFF_EN
			       |DAC_FORCE_DATA_EN
			       |DAC_FORCE_DATA_SEL_MASK);
	if ((rinfo->family == CHIP_FAMILY_RV250) ||
	    (rinfo->family == CHIP_FAMILY_RV280))
	    ulData |= (0x01b6 << DAC_FORCE_DATA_SHIFT);
	else
	    ulData |= (0x01ac << DAC_FORCE_DATA_SHIFT);

	OUTREG(DAC_EXT_CNTL, ulData);

	ulOrigDAC_CNTL     = INREG(DAC_CNTL);
	ulData             = ulOrigDAC_CNTL;
	ulData            |= DAC_CMP_EN;
	ulData            &= ~(DAC_RANGE_CNTL_MASK
			       | DAC_PDWN);
	ulData            |= 0x2;
	OUTREG(DAC_CNTL, ulData);

	mdelay(1);

	ulData     = INREG(DAC_CNTL);
	connected =  (DAC_CMP_OUTPUT & ulData) ? 1 : 0;
  
	ulData    = ulOrigVCLK_ECP_CNTL;
	ulMask    = 0xFFFFFFFFL;
	OUTPLLP(VCLK_ECP_CNTL, ulData, ulMask);

	OUTREG(DAC_CNTL,      ulOrigDAC_CNTL     );
	OUTREG(DAC_EXT_CNTL,  ulOrigDAC_EXT_CNTL );
	OUTREG(CRTC_EXT_CNTL, ulOrigCRTC_EXT_CNTL);
    }

    return connected ? MT_CRT : MT_NONE;
}

/*
 * Parse the "monitor_layout" string if any. This code is mostly
 * copied from XFree's radeon driver
 */
static int __devinit radeon_parse_monitor_layout(struct radeonfb_info *rinfo,
						 const char *monitor_layout)
{
	char s1[5], s2[5];
	int i = 0, second = 0;
	const char *s;

	if (!monitor_layout)
		return 0;

	s = monitor_layout;
	do {
		switch(*s) {
		case ',':
			s1[i] = '\0';
			i = 0;
			second = 1;
			break;
		case ' ':
		case '\0':
			break;
		default:
			if (i > 4)
				break;
			if (second)
				s2[i] = *s;
			else
				s1[i] = *s;
			i++;
		}
	} while (*s++);
	if (second)
		s2[i] = 0;
	else {
		s1[i] = 0;
		s2[0] = 0;
	}
	if (strcmp(s1, "CRT") == 0)
		rinfo->mon1_type = MT_CRT;
	else if (strcmp(s1, "TMDS") == 0)
		rinfo->mon1_type = MT_DFP;
	else if (strcmp(s1, "LVDS") == 0)
		rinfo->mon1_type = MT_LCD;

	if (strcmp(s2, "CRT") == 0)
		rinfo->mon2_type = MT_CRT;
	else if (strcmp(s2, "TMDS") == 0)
		rinfo->mon2_type = MT_DFP;
	else if (strcmp(s2, "LVDS") == 0)
		rinfo->mon2_type = MT_LCD;

	return 1;
}

/*
 * Probe display on both primary and secondary card's connector (if any)
 * by various available techniques (i2c, OF device tree, BIOS, ...) and
 * try to retreive EDID. The algorithm here comes from XFree's radeon
 * driver
 */
void __devinit radeon_probe_screens(struct radeonfb_info *rinfo,
				    const char *monitor_layout, int ignore_edid)
{
#ifdef CONFIG_FB_RADEON_I2C
	int ddc_crt2_used = 0;	
#endif
	int tmp, i;

	radeon_parse_connector_info(rinfo);

	if (radeon_parse_monitor_layout(rinfo, monitor_layout)) {

		/*
		 * If user specified a monitor_layout option, use it instead
		 * of auto-detecting. Maybe we should only use this argument
		 * on the first radeon card probed or provide a way to specify
		 * a layout for each card ?
		 */

		RTRACE("Using specified monitor layout: %s", monitor_layout);
#ifdef CONFIG_FB_RADEON_I2C
		if (!ignore_edid) {
			if (rinfo->mon1_type != MT_NONE)
				if (!radeon_probe_i2c_connector(rinfo, ddc_dvi, &rinfo->mon1_EDID)) {
					radeon_probe_i2c_connector(rinfo, ddc_crt2, &rinfo->mon1_EDID);
					ddc_crt2_used = 1;
				}
			if (rinfo->mon2_type != MT_NONE)
				if (!radeon_probe_i2c_connector(rinfo, ddc_vga, &rinfo->mon2_EDID) &&
				    !ddc_crt2_used)
					radeon_probe_i2c_connector(rinfo, ddc_crt2, &rinfo->mon2_EDID);
		}
#endif /* CONFIG_FB_RADEON_I2C */
		if (rinfo->mon1_type == MT_NONE) {
			if (rinfo->mon2_type != MT_NONE) {
				rinfo->mon1_type = rinfo->mon2_type;
				rinfo->mon1_EDID = rinfo->mon2_EDID;
			} else {
				rinfo->mon1_type = MT_CRT;
				printk(KERN_INFO "radeonfb: No valid monitor, assuming CRT on first port\n");
			}
			rinfo->mon2_type = MT_NONE;
			rinfo->mon2_EDID = NULL;
		}
	} else {
		/*
		 * Auto-detecting display type (well... trying to ...)
		 */
		
		RTRACE("Starting monitor auto detection...\n");

#if DEBUG && defined(CONFIG_FB_RADEON_I2C)
		{
			u8 *EDIDs[4] = { NULL, NULL, NULL, NULL };
			int mon_types[4] = {MT_NONE, MT_NONE, MT_NONE, MT_NONE};
			int i;

			for (i = 0; i < 4; i++)
				mon_types[i] = radeon_probe_i2c_connector(rinfo,
									  i+1, &EDIDs[i]);
		}
#endif /* DEBUG */
		/*
		 * Old single head cards
		 */
		if (!rinfo->has_CRTC2) {
#ifdef CONFIG_PPC_OF
			if (rinfo->mon1_type == MT_NONE)
				rinfo->mon1_type = radeon_probe_OF_head(rinfo, 0,
									&rinfo->mon1_EDID);
#endif /* CONFIG_PPC_OF */
#ifdef CONFIG_FB_RADEON_I2C
			if (rinfo->mon1_type == MT_NONE)
				rinfo->mon1_type = radeon_probe_i2c_connector(rinfo, ddc_dvi,
								      &rinfo->mon1_EDID);
			if (rinfo->mon1_type == MT_NONE)
				rinfo->mon1_type =
					radeon_probe_i2c_connector(rinfo, ddc_vga,
								   &rinfo->mon1_EDID);