[U-Boot-Users] Patch: PCI mode indication for PQ2FADS-ZU

[Yuli Barcohen]

Hi,

According to the MPC8260 User's Manual, PCI_MODE signal should be
reflected in SCCR register, and local bus pins configuration is taken
from HRCW and appears in SIUMCR. For some reason it does not work this
way, so the only possibility to detect if the board is configured in PCI
mode is to check the BCSR. The attached patch sets SCCR and SIUMCR
according to the BCSR.
-- 
========================================================================
 Yuli Barcohen       | Phone +972-9-765-1788 |  Software Project Leader
 yuli at arabellasw.com | Fax   +972-9-765-7494 | Arabella Software, Israel
========================================================================
-------------- next part --------------
Index: board/mpc8260ads/mpc8260ads.c
===================================================================
RCS file: /home/CVS/u-boot/u-boot/board/mpc8260ads/mpc8260ads.c,v
retrieving revision 1.1.1.5
retrieving revision 1.9
diff -p -u -r1.1.1.5 -r1.9
--- board/mpc8260ads/mpc8260ads.c	6 Aug 2003 17:03:01 -0000	1.1.1.5
+++ board/mpc8260ads/mpc8260ads.c	7 Aug 2003 09:22:32 -0000	1.9
@@ -35,6 +35,7 @@
 #include <common.h>
 #include <ioports.h>
 #include <mpc8260.h>
+#include <asm/m8260_pci.h>
 #include <i2c.h>
 #include <spd.h>
 #include <miiphy.h>
@@ -237,6 +238,7 @@ int board_pre_init (void)
 
 long int initdram (int board_type)
 {
+	vu_long *bcsr = (vu_long *)CFG_BCSR;
 	volatile immap_t *immap = (immap_t *) CFG_IMMR;
 	volatile memctl8260_t *memctl = &immap->im_memctl;
 	volatile uchar *ramaddr, c = 0xff;
@@ -252,27 +254,41 @@ long int initdram (int board_type)
 	immap->im_siu_conf.sc_ppc_alrh = 0x01267893;
 	immap->im_siu_conf.sc_tescr1   = 0x00004000;
 
+#if CONFIG_ADSTYPE == CFG_PQ2FADS
+	if ((bcsr[3] & BCSR_PCI_MODE) == 0) { /* PCI mode selected by JP9 */
+		immap->im_clkrst.car_sccr |= M826X_SCCR_PCI_MODE_EN;
+		immap->im_siu_conf.sc_siumcr =
+			(immap->im_siu_conf.sc_siumcr & ~SIUMCR_LBPC11)
+			| SIUMCR_LBPC01;
+	}
+#endif /* CONFIG_ADSTYPE == CFG_PQ2FADS */
+
 	memctl->memc_mptpr = CFG_MPTPR;
 #ifdef CFG_LSDRAM_BASE
-	/* Init local bus SDRAM */
-	memctl->memc_lsrt  = CFG_LSRT;
+	/*
+	  Initialise local bus SDRAM only if the pins
+	  are configured as local bus pins and not as PCI.
+	  The configuration is determined by the HRCW.
+	*/
+	if ((immap->im_siu_conf.sc_siumcr & SIUMCR_LBPC11) == SIUMCR_LBPC00) {
+		memctl->memc_lsrt  = CFG_LSRT;
 #if CONFIG_ADSTYPE == CFG_PQ2FADS /* CS3 */
-	memctl->memc_or3   = 0xFF803280;
-	memctl->memc_br3   = CFG_LSDRAM_BASE | 0x00001861;
+		memctl->memc_or3   = 0xFF803280;
+		memctl->memc_br3   = CFG_LSDRAM_BASE | 0x00001861;
 #else  				  /* CS4 */
-	memctl->memc_or4   = 0xFFC01480;
-	memctl->memc_br4   = CFG_LSDRAM_BASE | 0x00001861;
+		memctl->memc_or4   = 0xFFC01480;
+		memctl->memc_br4   = CFG_LSDRAM_BASE | 0x00001861;
 #endif /* CONFIG_ADSTYPE == CFG_PQ2FADS */
-	memctl->memc_lsdmr = CFG_LSDMR | 0x28000000;
-	ramaddr = (uchar *) CFG_LSDRAM_BASE;
-	*ramaddr = c;
-	memctl->memc_lsdmr = CFG_LSDMR | 0x08000000;
-	for (i = 0; i < 8; i++) {
+		memctl->memc_lsdmr = CFG_LSDMR | 0x28000000;
+		ramaddr = (uchar *) CFG_LSDRAM_BASE;
+		*ramaddr = c;
+		memctl->memc_lsdmr = CFG_LSDMR | 0x08000000;
+		for (i = 0; i < 8; i++)
+			*ramaddr = c;
+		memctl->memc_lsdmr = CFG_LSDMR | 0x18000000;
 		*ramaddr = c;
+		memctl->memc_lsdmr = CFG_LSDMR | 0x40000000;
 	}
-	memctl->memc_lsdmr = CFG_LSDMR | 0x18000000;
-	*ramaddr = c;
-	memctl->memc_lsdmr = CFG_LSDMR | 0x40000000;
 #endif /* CFG_LSDRAM_BASE */
 
 	/* Init 60x bus SDRAM */
Index: include/configs/MPC8260ADS.h
===================================================================
RCS file: /home/CVS/u-boot/u-boot/include/configs/MPC8260ADS.h,v
retrieving revision 1.1.1.5
retrieving revision 1.11
diff -p -u -r1.1.1.5 -r1.11
--- include/configs/MPC8260ADS.h	6 Aug 2003 17:03:02 -0000	1.1.1.5
+++ include/configs/MPC8260ADS.h	7 Aug 2003 09:22:32 -0000	1.11
@@ -206,6 +206,8 @@
 /*
  * Miscellaneous configurable options
  */
+#define CFG_HUSH_PARSER
+#define CFG_PROMPT_HUSH_PS2 "> "
 #define CFG_LONGHELP			/* undef to save memory	    */
 #define CFG_PROMPT	"=> "		/* Monitor Command Prompt   */
 #if (CONFIG_COMMANDS & CFG_CMD_KGDB)
@@ -247,7 +249,7 @@
 #define CFG_IMMR		0xF0000000
 #define CFG_BCSR		0xF4500000
 #define CFG_SDRAM_BASE		0x00000000
-#define CFG_LSDRAM_BASE		0xD0000000
+#define CFG_LSDRAM_BASE		0xFD000000
 
 #define RS232EN_1		0x02000002
 #define RS232EN_2		0x01000001
@@ -255,6 +257,7 @@
 #define FETH1_RST		0x04000004
 #define FETHIEN2		0x01000000
 #define FETH2_RST		0x08000000
+#define BCSR_PCI_MODE		0x01000000
 
 #define CFG_INIT_RAM_ADDR	CFG_IMMR
 #define CFG_INIT_RAM_END	0x4000	/* End of used area in DPRAM	*/
@@ -326,6 +329,10 @@
 #define CFG_TMCNTSC		(TMCNTSC_SEC|TMCNTSC_ALR|TMCNTSC_TCF|TMCNTSC_TCE)
 #define CFG_PISCR		(PISCR_PS|PISCR_PTF|PISCR_PTE)
 #define CFG_RCCR		0
+
+#if CONFIG_ADSTYPE == CFG_8266ADS
+#undef CFG_LSDRAM_BASE		/* No local bus SDRAM on MPC8266ADS */
+#endif /* CONFIG_ADSTYPE == CFG_8266ADS */
 
 #if CONFIG_ADSTYPE == CFG_PQ2FADS
 #define CFG_PSDMR		0x824B36A3