* Patch by Yuli Barcohen, 13 Jul 2004:

  Allow clock setting on MPC866/MPC885 series chips according to
  environment variable `cpuclk'

* Patch by Yuli Barcohen, 20 Apr 2004:
  Remove unnecessary redefine of CPM_DATAONLY_SIZE for MPC826x

CHANGELOG

@@ -2,6 +2,13 @@
 Changes since U-Boot 1.1.1:
 ======================================================================
 
+* Patch by Yuli Barcohen, 13 Jul 2004:
+  Allow clock setting on MPC866/MPC885 series chips according to
+  environment variable `cpuclk'
+
+* Patch by Yuli Barcohen, 20 Apr 2004:
+  Remove unnecessary redefine of CPM_DATAONLY_SIZE for MPC826x
+
 * Patch by Vincent Dubey, 24 Sep 2004:
   Add support for xaeniax board
 

README

@@ -339,16 +339,17 @@ The following options need to be configured:
 		CONFIG_MPC8240, CONFIG_MPC8245
 
 - 8xx CPU Options: (if using an MPC8xx cpu)
-		Define one or more of
-		CONFIG_8xx_GCLK_FREQ	- if get_gclk_freq() cannot work
+		CONFIG_8xx_GCLK_FREQ	- deprecated: CPU clock if
+					  get_gclk_freq() cannot work
 					  e.g. if there is no 32KHz
 					  reference PIT/RTC clock
+		CONFIG_8xx_OSCLK	- PLL input clock (either EXTCLK
+					  or XTAL/EXTAL)
 
-- 859/866 CPU options: (if using a MPC859 or MPC866 CPU):
-		CFG_866_OSCCLK
-		CFG_866_CPUCLK_MIN
-		CFG_866_CPUCLK_MAX
-		CFG_866_CPUCLK_DEFAULT
+- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU):
+		CFG_8xx_CPUCLK_MIN
+		CFG_8xx_CPUCLK_MAX
+		CONFIG_8xx_CPUCLK_DEFAULT
 			See doc/README.MPC866
 
 		CFG_MEASURE_CPUCLK
@@ -358,7 +359,7 @@ The following options need to be configured:
 		values. Mostly useful for board bringup to make sure
 		the PLL is locked at the intended frequency. Note
 		that this requires a (stable) reference clock (32 kHz
-		RTC clock),
+		RTC clock or CFG_8XX_XIN)
 
 - Linux Kernel Interface:
 		CONFIG_CLOCKS_IN_MHZ

cpu/mpc8260/commproc.c

@@ -20,13 +20,6 @@
 #include <common.h>
 #include <asm/cpm_8260.h>
 
-/*
- * because we have stack and init data in dual port ram
- * we must reduce the size
- */
-#undef	CPM_DATAONLY_SIZE
-#define CPM_DATAONLY_SIZE	((uint)(8 * 1024) - CPM_DATAONLY_BASE)
-
 void
 m8260_cpm_reset(void)
 {

cpu/mpc8xx/cpu.c

@@ -124,13 +124,13 @@ static int check_CPU (long clock, uint pvr, uint immr)
 		printf ("unknown M%s (0x%08x)", id_str, k);
 
 
-#if defined(CFG_866_CPUCLK_MIN) && defined(CFG_866_CPUCLK_MAX)
+#if defined(CFG_8xx_CPUCLK_MIN) && defined(CFG_8xx_CPUCLK_MAX)
 	printf (" at %s MHz [%d.%d...%d.%d MHz]\n       ",
 		strmhz (buf, clock),
-		CFG_866_CPUCLK_MIN / 1000000,
-		((CFG_866_CPUCLK_MIN % 1000000) + 50000) / 100000,
-		CFG_866_CPUCLK_MAX / 1000000,
-		((CFG_866_CPUCLK_MAX % 1000000) + 50000) / 100000
+		CFG_8xx_CPUCLK_MIN / 1000000,
+		((CFG_8xx_CPUCLK_MIN % 1000000) + 50000) / 100000,
+		CFG_8xx_CPUCLK_MAX / 1000000,
+		((CFG_8xx_CPUCLK_MAX % 1000000) + 50000) / 100000
 	);
 #else
 	printf (" at %s MHz: ", strmhz (buf, clock));
@@ -140,7 +140,7 @@ static int check_CPU (long clock, uint pvr, uint immr)
 		checkdcache () >> 10
 	);
 
-	/* do we have a FEC (860T/P or 852/859/866)? */
+	/* do we have a FEC (860T/P or 852/859/866/885)? */
 
 	immap->im_cpm.cp_fec.fec_addr_low = 0x12345678;
 	if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) {

cpu/mpc8xx/speed.c

@@ -25,7 +25,7 @@
 #include <mpc8xx.h>
 #include <asm/processor.h>
 
-#if !defined(CONFIG_TQM866M) || defined(CFG_MEASURE_CPUCLK)
+#if !defined(CONFIG_8xx_CPUCLK_DEFAULT) || defined(CFG_MEASURE_CPUCLK)
 
 #define PITC_SHIFT 16
 #define PITR_SHIFT 16
@@ -172,7 +172,7 @@ unsigned long measure_gclk(void)
 
 #endif
 
-#if !defined(CONFIG_TQM866M) && !defined(CONFIG_NC650)
+#if !defined(CONFIG_8xx_CPUCLK_DEFAULT)
 
 /*
  * get_clocks() fills in gd->cpu_clock depending on CONFIG_8xx_GCLK_FREQ
@@ -226,15 +226,15 @@ int get_clocks (void)
 	return (0);
 }
 
-#else /* CONFIG_MPC866_FAMILY */
+#else /* CONFIG_8xx_CPUCLK_DEFAULT defined, use dynamic clock setting */
 
 static long init_pll_866 (long clk);
 
 /* This function sets up PLL (init_pll_866() is called) and
  * fills gd->cpu_clk and gd->bus_clk according to the environment
- * variable 'cpuclk' or to CFG_866_CPUCLK_DEFAULT (if 'cpuclk'
+ * variable 'cpuclk' or to CONFIG_8xx_CPUCLK_DEFAULT (if 'cpuclk'
  * contains invalid value).
- * This functions requires an MPC866 series CPU.
+ * This functions requires an MPC866 or newer series CPU.
  */
 int get_clocks_866 (void)
 {
@@ -248,8 +248,8 @@ int get_clocks_866 (void)
 	if (getenv_r ("cpuclk", tmp, sizeof (tmp)) > 0)
 		cpuclk = simple_strtoul (tmp, NULL, 10) * 1000000;
 
-	if ((CFG_866_CPUCLK_MIN > cpuclk) || (CFG_866_CPUCLK_MAX < cpuclk))
-		cpuclk = CFG_866_CPUCLK_DEFAULT;
+	if ((CFG_8xx_CPUCLK_MIN > cpuclk) || (CFG_8xx_CPUCLK_MAX < cpuclk))
+		cpuclk = CONFIG_8xx_CPUCLK_DEFAULT;
 
 	gd->cpu_clk = init_pll_866 (cpuclk);
 #if defined(CFG_MEASURE_CPUCLK)
@@ -284,13 +284,13 @@ int sdram_adjust_866 (void)
 
 	mamr = immr->im_memctl.memc_mamr;
 	mamr &= ~MAMR_PTA_MSK;
-	mamr |= ((gd->cpu_clk / CFG_866_PTA_PER_CLK) << MAMR_PTA_SHIFT);
+	mamr |= ((gd->cpu_clk / CFG_PTA_PER_CLK) << MAMR_PTA_SHIFT);
 	immr->im_memctl.memc_mamr = mamr;
 
 	return (0);
 }
 
-/* Configure PLL for MPC866/859 CPU series
+/* Configure PLL for MPC866/859/885 CPU series
  * PLL multiplication factor is set to the value nearest to the desired clk,
  * assuming a oscclk of 10 MHz.
  */
@@ -312,19 +312,19 @@ static long init_pll_866 (long clk)
 
 	if (clk < 40000000) {
 		s = 2;
-		step_mfi = CFG_866_OSCCLK / 4;
+		step_mfi = CONFIG_8xx_OSCLK / 4;
 		mfd = 7;
-		step_mfn = CFG_866_OSCCLK / 30;
+		step_mfn = CONFIG_8xx_OSCLK / 30;
 	} else if (clk < 80000000) {
 		s = 1;
-		step_mfi = CFG_866_OSCCLK / 2;
+		step_mfi = CONFIG_8xx_OSCLK / 2;
 		mfd = 14;
-		step_mfn = CFG_866_OSCCLK / 30;
+		step_mfn = CONFIG_8xx_OSCLK / 30;
 	} else {
 		s = 0;
-		step_mfi = CFG_866_OSCCLK;
+		step_mfi = CONFIG_8xx_OSCLK;
 		mfd = 29;
-		step_mfn = CFG_866_OSCCLK / 30;
+		step_mfn = CONFIG_8xx_OSCLK / 30;
 	}
 
 	/* Calculate integer part of multiplication factor
@@ -362,7 +362,7 @@ static long init_pll_866 (long clk)
 	return (n);
 }
 
-#endif /* CONFIG_MPC866_FAMILY */
+#endif /* CONFIG_8xx_CPUCLK_DEFAULT */
 
 #if defined(CONFIG_TQM8xxL) && !defined(CONFIG_TQM866M)
 /*

doc/README.MPC866

@@ -1,12 +1,12 @@
 The current implementation allows the user to specify the desired CPU
 clock value, in MHz, via an environment variable "cpuclk".
 
-Three compile-time constants are used:
+Four compile-time constants are used:
 
-	CFG_866_OSCCLK            - input quartz clock
-	CFG_866_CPUCLK_MIN        - minimum allowed CPU clock
-	CFG_866_CPUCLK_MAX        - maximum allowed CPU clock
-	CFG_866_CPUCLK_DEFAULT    - default CPU clock value
+	CONFIG_8xx_OSCLK          - input quartz clock
+	CFG_8xx_CPUCLK_MIN        - minimum allowed CPU clock
+	CFG_8xx_CPUCLK_MAX        - maximum allowed CPU clock
+	CONFIG_8xx_CPUCLK_DEFAULT - default CPU clock value
 
 If the "cpuclk" environment variable value is within the CPUCLK_MIN /
 CPUCLK_MAX limits, the specified value is used. Otherwise, the
@@ -16,8 +16,9 @@ Please make sure you understand what you are doing, and understand
 the restrictions of your hardware (board, processor). For example,
 ethernet will stop working for CPU clock frequencies below 25 MHz.
 
-Please note that for now the new clock-handling code has been enabled
-for the TQM866M board only, even though it should be pretty much
-common for other MPC859 / MPC866 based boards also. Our intention
-here was to move in small steps and not to break the existing code
-for other boards.
+Please note that the new clock-handling code is enabled if
+CONFIG_8xx_CPUCLK_DEFAULT is defined. Since this mechanism supports
+only MPC866 and newer CPUs, this constant MUST NOT be defined for
+MPC823/850/860/862 series. The clock generation algorithm for older
+chips is different and has not been implemented yet. If you need it,
+your patch is welcome.

include/configs/Adder.h

@@ -41,7 +41,14 @@
 #define FEC_ENET
 #endif /* CONFIG_FEC_ENET */
 
-#define CONFIG_8xx_OSCLK	10000000	/* 10 MHz oscillator on EXTCLK  */
+#define CONFIG_8xx_OSCLK		10000000 /* 10 MHz oscillator on EXTCLK */
+#define CONFIG_8xx_CPUCLK_DEFAULT	50000000
+#define CFG_8xx_CPUCLK_MIN		40000000
+#ifdef CONFIG_MPC852T
+#define CFG_8xx_CPUCLK_MAX		50000000
+#else
+#define CFG_8xx_CPUCLK_MAX		120000000
+#endif /* CONFIG_MPC852T */
 
 #define CONFIG_COMMANDS		(CONFIG_CMD_DFL  \
 				| CFG_CMD_DHCP   \
@@ -89,6 +96,15 @@
 
 #define CFG_MAMR		0x00802114
 
+/*
+ * 2048	SDRAM rows
+ * 1000	factor s -> ms
+ * 64	PTP (pre-divider from MPTPR) from SDRAM example configuration
+ * 4	Number of refresh cycles per period
+ * 64	Refresh cycle in ms per number of rows
+ */
+#define CFG_PTA_PER_CLK		((2048 * 64 * 1000) / (4 * 64))
+
 #define CFG_MEMTEST_START	0x00100000	/* memtest works on		*/
 #define CFG_MEMTEST_END		0x00700000	/* 1 ... 7 MB in SDRAM		*/
 

include/configs/NC650.h

@@ -44,25 +44,25 @@
 /*
  * 10 MHz - PLL input clock
  */
-#define CFG_866_OSCCLK		10000000
+#define CFG_8xx_OSCCLK			10000000
 
 /*
  * 50 MHz - default CPU clock
  */
-#define CFG_866_CPUCLK_DEFAULT	50000000
+#define CONFIG_8xx_CPUCLK_DEFAULT	50000000
 
 /*
  * 15 MHz - CPU minimum clock
  */
-#define CFG_866_CPUCLK_MIN	15000000
+#define CFG_8xx_CPUCLK_MIN		15000000
 
 /*
  * 133 MHz - CPU maximum clock
  */
-#define CFG_866_CPUCLK_MAX	133000000
+#define CFG_8xx_CPUCLK_MAX		133000000
 
 #define CFG_MEASURE_CPUCLK
-#define CFG_8XX_XIN		CFG_866_OSCCLK
+#define CFG_8XX_XIN			CFG_8xx_OSCCLK
 
 #define CONFIG_BOOTDELAY	5	/* autoboot after 5 seconds	*/
 
@@ -307,7 +307,7 @@
  * 4    Number of refresh cycles per period
  * 64   Refresh cycle in ms per number of rows
  */
-#define CFG_866_PTA_PER_CLK	((4096 * 64 * 1000) / (4 * 64))
+#define CFG_PTA_PER_CLK		((4096 * 64 * 1000) / (4 * 64))
 
 /*
  * Memory Periodic Timer Prescaler

include/configs/TQM866M.h

@@ -1,5 +1,5 @@
 /*
- * (C) Copyright 2000-2003
+ * (C) Copyright 2000-2004
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * See file CREDITS for list of people who contributed to this
@@ -36,10 +36,10 @@
 #define CONFIG_MPC866		1	/* This is a MPC866 CPU		*/
 #define CONFIG_TQM866M		1	/* ...on a TQM8xxM module	*/
 
-#define CFG_866_OSCCLK		 10000000	/*  10 MHz - PLL input clock		*/
-#define CFG_866_CPUCLK_MIN	 15000000	/*  15 MHz - CPU minimum clock		*/
-#define CFG_866_CPUCLK_MAX	133000000	/* 133 MHz - CPU maximum clock		*/
-#define CFG_866_CPUCLK_DEFAULT	 50000000	/*  50 MHz - CPU default clock		*/
+#define CONFIG_8xx_OSCLK		10000000	/*  10 MHz - PLL input clock	*/
+#define CFG_8xx_CPUCLK_MIN		15000000	/*  15 MHz - CPU minimum clock	*/
+#define CFG_8xx_CPUCLK_MAX		133000000	/* 133 MHz - CPU maximum clock	*/
+#define CONFIG_8xx_CPUCLK_DEFAULT	50000000	/*  50 MHz - CPU default clock	*/
 						/* (it will be used if there is no	*/
 						/* 'cpuclk' variable with valid value)	*/
 
@@ -404,12 +404,12 @@
  * 4	Number of refresh cycles per period
  * 64	Refresh cycle in ms per number of rows
  */
-#define CFG_866_PTA_PER_CLK	((4096 * 64 * 1000) / (4 * 64))
+#define CFG_PTA_PER_CLK	((4096 * 64 * 1000) / (4 * 64))
 
 /*
  * Memory Periodic Timer Prescaler
  * Periodic timer for refresh, start with refresh rate for 40 MHz clock
- * (CFG_866_CPUCLK_MIN / CFG_866_PTA_PER_CLK)
+ * (CFG_8xx_CPUCLK_MIN / CFG_PTA_PER_CLK)
  */
 #define CFG_MAMR_PTA		39
 

lib_ppc/board.c

@@ -264,7 +264,7 @@ init_fnc_t *init_sequence[] = {
 	board_early_init_f,
 #endif
 
-#if !defined(CONFIG_TQM866M) && !defined(CONFIG_NC650)
+#if !defined(CONFIG_8xx_CPUCLK_DEFAULT)
 	get_clocks,		/* get CPU and bus clocks (etc.) */
 #if defined(CONFIG_TQM8xxL) && !defined(CONFIG_TQM866M)
 	adjust_sdram_tbs_8xx,
@@ -280,7 +280,7 @@ init_fnc_t *init_sequence[] = {
 	board_postclk_init,
 #endif
 	env_init,
-#if defined(CONFIG_TQM866M) || defined(CONFIG_NC650)
+#if defined(CONFIG_8xx_CPUCLK_DEFAULT)
 	get_clocks_866,		/* get CPU and bus clocks according to the environment variable */
 	sdram_adjust_866,	/* adjust sdram refresh rate according to the new clock */
 	init_timebase,