* Make CPU clock on ICA-IP board controllable by a "cpuclk"

  environment variable which can set to "100", "133", or "150". The
  CPU clock will be configured accordingly upon next reboot. Other
  values are ignored. In case of an invalid or undefined "cpuclk"
  value, the compile-time default CPU clock speed will be used.

* Enable Quad-UART on BMS2003 board (initialize the PCMCIA memory
  window that is used to access the UART registers by the Linux driver)

* Patch by Reinhard Meyer, 20 Dec 2003:
  Fix clock calculation for the MPC5200 for higher clock frequencies
  (above 2**32 / 10 = 429.5 MHz).

CHANGELOG

@@ -2,6 +2,21 @@
 Changes since U-Boot 1.0.0:
 ======================================================================
 
+* Make CPU clock on ICA-IP board controllable by a "cpuclk"
+  environment variable which can set to "100", "133", or "150". The
+  CPU clock will be configured accordingly upon next reboot. Other
+  values are ignored. In case of an invalid or undefined "cpuclk"
+  value, the compile-time default CPU clock speed will be used.
+
+* Enable Quad-UART on BMS2003 board (initialize the PCMCIA memory
+  window that is used to access the UART registers by the Linux driver)
+
+* Patch by Reinhard Meyer, 20 Dec 2003:
+  Fix clock calculation for the MPC5200 for higher clock frequencies
+  (above 2**32 / 10 = 429.5 MHz).
+
+* Fix CONFIG_PLL_PCI_TO_MEM_MULTIPLIER divider error in SP8240 configuration
+
 * Fix IceCube CLKIN configuration (it's 33.000000MHz)
 
 * Add new configuration for IceCube board with DDR memory

README

@@ -3110,7 +3110,7 @@ int main (int argc, char *argv[])
 
 	while (learning) {
 		Read the README file in the top level directory;
-		Read http://www.denx.de/re/DPLG.html
+		Read http://www.denx.de/twiki/bin/view/DULG/Manual ;
 		Read the source, Luke;
 	}
 

board/incaip/memsetup.S

@@ -55,63 +55,142 @@
 #define CGU_MUXCR(value)        0x0014(value)
 #define CGU_PLL1SR(value)       0x000C(value)
 
-	.globl	memsetup
-memsetup:
+	.set	noreorder		
 
-	/* EBU Initialization for the Flash CS0 and CS2.
-	 */
-	li	t0, EBU_MODUL_BASE
 
-	li	t1, 0xA0000041
-	sw	t1, EBU_ADDSEL0(t0)
+/*
+ * void ebu_init(long)
+ *
+ * a0 has the clock value we are going to run at
+ */
+	.globl	ebu_init
+	.ent	ebu_init
+ebu_init:
+
+	li	t1, EBU_MODUL_BASE
+	li	t2, 0xA0000041
+	sw	t2, EBU_ADDSEL0(t1)
+	li	t2, 0xA0800041
+	sw	t2, EBU_ADDSEL2(t1)
+	li	t2, 0xBE0000F1
+	sw	t2, EBU_ADDSEL1(t1)
+
+	li	t3, 100000000
+	beq	a0, t3, 1f
+	nop
+	li	t3, 133000000
+	beq	a0, t3, 2f
+	nop
+	li	t3, 150000000
+	beq	a0, t3, 2f
+	nop
+	b	3f
+	nop
 
-#if CPU_CLOCK_RATE==100000000	/* 100 MHz clock for the MIPS core */
-	lw	t1, EBU_BUSCON0(t0)  /* value set up by magic flash word */
-	sw	t1, EBU_BUSCON2(t0)
-#else /* 150 MHz or 133 MHz */
-	li	t1, 0x8841417E
-	sw	t1, EBU_BUSCON0(t0)
-	sw	t1, EBU_BUSCON2(t0)
-#endif
+	/* 100 MHz */
+1:
+	li	t2, 0x8841417D
+	sw	t2, EBU_BUSCON0(t1)
+	sw	t2, EBU_BUSCON2(t1)
+	li	t2, 0x684142BD
+	b	3f
+	sw	t2, EBU_BUSCON1(t1)	/* delay slot */
+
+	/* 133 or 150 MHz */
+2:
+	li	t2, 0x8841417E
+	sw	t2, EBU_BUSCON0(t1)
+	sw	t2, EBU_BUSCON2(t1)
+	li	t2, 0x684143FD
+	sw	t2, EBU_BUSCON1(t1)
+3:
+	j	ra
+	nop
+
+	.end	ebu_init
 
-	li	t1, 0xA0800041
-	sw	t1, EBU_ADDSEL2(t0)
 
-	/* Need to initialize CS1 too, so as to to prevent overlapping with
-	 * Flash bank 1.
+/*
+ * void cgu_init(long)
+ *
+ * a0 has the clock value
+ */
+	.globl	cgu_init
+	.ent	cgu_init
+cgu_init:
+
+	li	t1, CGU_MODUL_BASE
+
+	li	t3, 100000000
+	beq	a0, t3, 1f
+	nop
+	li	t3, 133000000
+	beq	a0, t3, 2f
+	nop
+	li	t3, 150000000
+	beq	a0, t3, 3f
+	nop
+	b	5f
+	nop
+
+	/* 100 MHz clock */
+1:
+	li	t2, 0x80000014
+	sw	t2, CGU_DIVCR(t1)
+	li	t2, 0x80000000
+	sw	t2, CGU_MUXCR(t1)
+	li	t2, 0x800B0001
+	b	5f
+	sw	t2, CGU_PLL1CR(t1)	/* delay slot */
+
+	/* 133 MHz clock */
+2:
+	li	t2, 0x80000054
+	sw	t2, CGU_DIVCR(t1)
+	li	t2, 0x80000000
+	sw	t2, CGU_MUXCR(t1)
+	li	t2, 0x800B0001
+	b	5f
+	sw	t2, CGU_PLL1CR(t1)	/* delay slot */
+
+	/* 150 MHz clock */
+3:
+	li	t2, 0x80000017
+	sw	t2, CGU_DIVCR(t1)
+	li	t2, 0xC00B0001
+	sw	t2, CGU_PLL1CR(t1)
+	li	t3, 0x80000000
+4:
+	lw	t2, CGU_PLL1SR(t1)
+	and	t2, t2, t3
+	beq	t2, zero, 4b
+	nop
+	li	t2, 0x80000001
+	sw	t2, CGU_MUXCR(t1)
+5:
+	j	ra
+	nop
+
+	.end	cgu_init
+
+
+	.globl	memsetup
+	.ent	memsetup
+memsetup:
+
+	/* EBU and CGU Initialization.
 	 */
-	li	t1, 0xBE0000F1
- 	sw	t1, EBU_ADDSEL1(t0)
-
-#if CPU_CLOCK_RATE==100000000   /* 100 MHz clock for the MIPS core */
-	li	t1, 0x684142BD
-#else /* 150 MHz or 133 MHz */
-	li	t1, 0x684143FD
-#endif
- 	sw	t1, EBU_BUSCON1(t0)
-
-#if CPU_CLOCK_RATE==150000000   /* 150 MHz clock for the MIPS core */
-	li      t0, CGU_MODUL_BASE
-	li      t1, 0x80000017
-	sw      t1, CGU_DIVCR(t0)
-	li      t1, 0xC00B0001
-	sw      t1, CGU_PLL1CR(t0)
-	lui     t2, 0x8000
-b1:
-	lw      t1, CGU_PLL1SR(t0)
-	and     t1, t1, t2
-	beq     t1, zero, b1
-	li      t1, 0x80000001
-	sw      t1, CGU_MUXCR(t0)
-#elif CPU_CLOCK_RATE==133000000	/* 133 MHz clock for the MIPS core */
-	li	t0, CGU_MODUL_BASE
-	li	t1, 0x80000054
-	sw	t1, CGU_DIVCR(t0)
-	li	t1, 0x80000000
-	sw	t1, CGU_MUXCR(t0)
-	li	t1, 0x800B0001
-	sw	t1, CGU_PLL1CR(t0)
-#endif
+	li	a0, CPU_CLOCK_RATE
+	move	t0, ra
+
+	/* We rely on the fact that neither ebu_init() nor cgu_init()
+	 * modify t0 and a0.
+	 */
+	bal	ebu_init
+	nop
+	bal	cgu_init
+	nop
+	move	ra, t0
 
 	/* SDRAM Initialization.
 	 */
@@ -154,3 +233,5 @@ b1:
 
 	j	ra
 	nop
+	.end	memsetup
+

common/cmd_pcmcia.c

@@ -227,6 +227,18 @@ int pcmcia_on (void)
 			break;
 		    }
 #endif	/* CONFIG_IDE_8xx_PCCARD */
+#ifdef CONFIG_BMS2003
+		case 3: {	/* map I/O window for 4xUART data/ctrl */
+			win->br += 0x140000;
+			win->or = (	PCMCIA_BSIZE_256K
+				|	PCMCIA_PPS_8
+				|	PCMCIA_PRS_IO
+				|	slotbit
+				|	PCMCIA_PV
+				|	CFG_PCMCIA_TIMING );
+			break;
+		    }
+#endif /* CONFIG_BMS2003 */
 		default:	/* set to not valid */
 			win->or = 0;
 			break;

cpu/mips/incaip_clock.c

@@ -102,3 +102,18 @@ uint incaip_get_fpiclk(void)
 	 break;
    }
 }
+
+int incaip_set_cpuclk(void)
+{
+	uchar tmp[64];
+	ulong cpuclk;
+
+	if (getenv_r("cpuclk", tmp, sizeof(tmp)) > 0)
+	{
+		cpuclk = simple_strtoul(tmp, NULL, 10) * 1000000;
+		ebu_init(cpuclk);
+		cgu_init(cpuclk);
+	}
+
+	return 0;
+}

cpu/mpc5xxx/speed.c

@@ -30,10 +30,10 @@
 /* Bus-to-Core Multipliers */
 
 static int bus2core[] = {
-	0,  0,  0,  10, 20, 20, 25, 45,
-	30, 55, 40, 50, 0,  60, 35, 0,
-	30, 25, 65, 10, 70, 20, 75, 45,
-	0,  55, 40, 50, 80, 60, 35, 0
+	3, 2, 2, 2, 4, 4, 5, 9,
+	6, 11, 8, 10, 3, 12, 7, 0,
+	6, 5, 13, 2, 14, 4, 15, 9,
+	0, 11, 8, 10, 16, 12, 7, 0
 };
 /* ------------------------------------------------------------------------- */
 
@@ -62,7 +62,7 @@ int get_clocks (void)
 	} else {
 		gd->bus_clk = vco / 4;
 	}
-	gd->cpu_clk = gd->bus_clk * bus2core[val & 0x1f] / 10;
+	gd->cpu_clk = gd->bus_clk * bus2core[val & 0x1f] / 2;
 
 	val = *(vu_long *)MPC5XXX_CDM_CFG;
 	if (val & (1 << 8)) {

include/common.h

@@ -362,6 +362,9 @@ ulong	get_HCLK (void);
 ulong	get_PCLK (void);
 ulong	get_UCLK (void);
 #endif
+#if defined CONFIG_INCA_IP
+uint    incaip_get_cpuclk (void);
+#endif
 ulong	get_bus_freq  (ulong);
 
 #if defined(CONFIG_MPC85xx)

include/configs/Sandpoint8240.h

@@ -269,7 +269,7 @@
  */
 
 #define CONFIG_SYS_CLK_FREQ  33000000	/* external frequency to pll */
-#define CONFIG_PLL_PCI_TO_MEM_MULTIPLIER  2
+#define CONFIG_PLL_PCI_TO_MEM_MULTIPLIER  1
 
 #define CFG_ROMNAL		7	/*rom/flash next access time		*/
 #define CFG_ROMFAL		11	/*rom/flash access time			*/

include/configs/incaip.h

@@ -36,12 +36,7 @@
 #define CPU_CLOCK_RATE	133000000	/* 133 MHz clock for the MIPS core */
 #endif
 
-#if CPU_CLOCK_RATE == 100000000
-#define INFINEON_EBU_BOOTCFG	0x20C4	/* CMULT = 4 for 100 MHz */
-#else
-#define INFINEON_EBU_BOOTCFG	0x40C4	/* CMULT = 8 for 150 MHz */
-#endif
-
+#define INFINEON_EBU_BOOTCFG	0x40C4	/* CMULT = 8 */
 
 #define CONFIG_BOOTDELAY	5	/* autoboot after 5 seconds	*/
 
@@ -106,7 +101,7 @@
 
 #define CFG_BOOTPARAMS_LEN	128*1024
 
-#define CFG_HZ			(CPU_CLOCK_RATE/2)
+#define CFG_HZ			(incaip_get_cpuclk() / 2)
 
 #define CFG_SDRAM_BASE		0x80000000
 

lib_mips/board.c

@@ -41,6 +41,8 @@
 
 extern int timer_init(void);
 
+extern int incaip_set_cpuclk(void);
+
 extern ulong uboot_end_data;
 extern ulong uboot_end;
 
@@ -163,6 +165,9 @@ typedef int (init_fnc_t) (void);
 init_fnc_t *init_sequence[] = {
 	timer_init,
 	env_init,		/* initialize environment */
+#ifdef CONFIG_INCA_IP
+	incaip_set_cpuclk,	/* set cpu clock according to environment variable */
+#endif
 	init_baudrate,		/* initialze baudrate settings */
 	serial_init,		/* serial communications setup */
 	console_init_f,