Initial support for MPC8641 HPCN board.

1 files changed, 669 insertions, 0 deletions

diff --git a/cpu/mpc86xx/cpu.c b/cpu/mpc86xx/cpu.c
new file mode 100644
index 0000000..b0fe8ab
--- /dev/null
+++ b/cpu/mpc86xx/cpu.c
@@ -0,0 +1,669 @@
+/*
+ * Copyright 2004 Freescale Semiconductor
+ * Jeff Brown (jeffrey@freescale.com)
+ * Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <watchdog.h>
+#include <command.h>
+#include <asm/cache.h>
+#include <mpc86xx.h>
+
+#if defined(CONFIG_OF_FLAT_TREE)
+#include <ft_build.h>
+#endif
+
+
+// SS: For debug only, remove after use
+
+static __inline__ unsigned long get_dbat3u (void)
+{
+   unsigned long dbat3u;
+   asm volatile("mfspr %0, 542" : "=r" (dbat3u) :);
+   return dbat3u;
+}
+
+static __inline__ unsigned long get_dbat3l (void)
+{
+   unsigned long dbat3l;
+   asm volatile("mfspr %0, 543" : "=r" (dbat3l) :);
+   return dbat3l;
+}
+
+static __inline__ unsigned long get_msr (void)
+{
+   unsigned long msr;
+   asm volatile("mfmsr %0" : "=r" (msr) :);
+   return msr;
+}
+
+extern unsigned long get_board_sys_clk(ulong dummy);
+
+int checkcpu (void)
+{
+	sys_info_t sysinfo;
+	uint pvr, svr;
+	uint ver;
+	uint major, minor;
+	uint lcrr;		/* local bus clock ratio register */
+	uint clkdiv;		/* clock divider portion of lcrr */
+	
+	puts("Freescale PowerPC\n");
+
+	pvr = get_pvr();
+	ver = PVR_VER(pvr);
+	major = PVR_MAJ(pvr);
+	minor = PVR_MIN(pvr);
+
+	puts ("CPU:\n");
+
+	printf("    Core: ");
+	
+	switch (ver) {
+	case PVR_VER(PVR_86xx):
+	    puts("E600");
+	    break;
+	default:
+	    puts("Unknown");
+	    break;
+	}
+	printf(", Version: %d.%d, (0x%08x)\n", major, minor, pvr);
+
+	svr = get_svr();
+	ver = SVR_VER(svr);
+	major = SVR_MAJ(svr);
+	minor = SVR_MIN(svr);
+
+	puts("    System: ");
+	switch (ver) {	
+	case SVR_8641:
+	        puts("8641");
+	        break;
+	case SVR_8641D:
+		puts("8641D");
+		break;
+	default:
+		puts("Unknown");
+		break;
+	}
+	printf(", Version: %d.%d, (0x%08x)\n", major, minor, svr);
+
+	get_sys_info(&sysinfo);
+
+	puts("    Clocks: ");
+	printf("CPU:%4lu MHz, ", sysinfo.freqProcessor / 1000000);
+	printf("MPX:%4lu MHz, ", sysinfo.freqSystemBus / 1000000);
+	printf("DDR:%4lu MHz, ", sysinfo.freqSystemBus / 2000000);
+        	
+#if defined(CFG_LBC_LCRR)
+	lcrr = CFG_LBC_LCRR;
+#else
+	{
+	    volatile immap_t *immap = (immap_t *)CFG_IMMR;
+	    volatile ccsr_lbc_t *lbc= &immap->im_lbc;
+
+	    lcrr = lbc->lcrr;
+	}
+#endif
+	clkdiv = lcrr & 0x0f;
+	if (clkdiv == 2 || clkdiv == 4 || clkdiv == 8) {
+		printf("LBC:%4lu MHz\n",
+		       sysinfo.freqSystemBus / 1000000 / clkdiv);
+	} else {
+		printf("    LBC: unknown (lcrr: 0x%08x)\n", lcrr);
+	}
+
+        printf("    L2: ");
+        if (get_l2cr() & 0x80000000)
+           printf("Enabled\n");
+        else
+           printf("Disabled\n");
+        
+	return (0);
+}
+
+
+/* -------------------------------------------------------------------- */
+
+static inline void
+soft_restart(unsigned long addr)
+{
+
+#ifndef CONFIG_MPC8641HPCN
+   
+	/* SRR0 has system reset vector, SRR1 has default MSR value */
+	/* rfi restores MSR from SRR1 and sets the PC to the SRR0 value */
+
+	__asm__ __volatile__ ("mtspr	26, %0"		:: "r" (addr));
+	__asm__ __volatile__ ("li	4, (1 << 6)"	::: "r4");
+	__asm__ __volatile__ ("mtspr	27, 4");
+	__asm__ __volatile__ ("rfi");
+
+#else /* CONFIG_MPC8641HPCN */
+        out8(PIXIS_BASE+PIXIS_RST,0);
+#endif /* !CONFIG_MPC8641HPCN */
+	while(1);	/* not reached */
+}
+
+
+
+#ifdef CONFIG_MPC8641HPCN
+
+int set_px_sysclk(ulong sysclk)
+{
+         u8 sysclk_s, sysclk_r, sysclk_v, vclkh, vclkl, sysclk_aux,tmp;
+
+         /* Per table 27, page 58 of MPC8641HPCN spec*/
+         switch(sysclk)
+         {
+            case 33:
+               sysclk_s = 0x04;
+               sysclk_r = 0x04;
+               sysclk_v = 0x07;
+               sysclk_aux = 0x00;
+               break;
+            case 40:
+               sysclk_s = 0x01;
+               sysclk_r = 0x1F;
+               sysclk_v = 0x20;
+               sysclk_aux = 0x01;
+               break;
+            case 50:
+               sysclk_s = 0x01;
+               sysclk_r = 0x1F;
+               sysclk_v = 0x2A;
+               sysclk_aux = 0x02;
+               break;
+            case 66:
+               sysclk_s = 0x01;
+               sysclk_r = 0x04;
+               sysclk_v = 0x04;
+               sysclk_aux = 0x03;
+               break;
+            case 83:
+               sysclk_s = 0x01;
+               sysclk_r = 0x1F;
+               sysclk_v = 0x4B;
+               sysclk_aux = 0x04;
+               break;
+            case 100:
+               sysclk_s = 0x01;
+               sysclk_r = 0x1F;
+               sysclk_v = 0x5C;
+               sysclk_aux = 0x05;
+               break;
+            case 134:
+               sysclk_s = 0x06;
+               sysclk_r = 0x1F;
+               sysclk_v = 0x3B;
+              sysclk_aux = 0x06; 
+               break;
+            case 166:
+               sysclk_s = 0x06;
+               sysclk_r = 0x1F;
+               sysclk_v = 0x4B;
+               sysclk_aux = 0x07;
+               break;
+            default:
+               printf("Unsupported SYSCLK frequency.\n");
+               return 0;
+         }
+         
+         vclkh = (sysclk_s << 5) | sysclk_r ;
+         vclkl = sysclk_v;
+         out8(PIXIS_BASE+PIXIS_VCLKH,vclkh);
+         out8(PIXIS_BASE+PIXIS_VCLKL,vclkl);
+
+         out8(PIXIS_BASE+PIXIS_AUX,sysclk_aux);
+         
+         return 1;
+}
+
+int set_px_mpxpll(ulong mpxpll)
+{
+         u8 tmp;
+         u8 val;
+         switch(mpxpll)
+         {
+            case 2:
+            case 4:
+            case 6:
+            case 8:
+            case 10:
+            case 12:
+            case 14:
+            case 16:
+               val = (u8)mpxpll;
+               break;
+            default:
+               printf("Unsupported MPXPLL ratio.\n");
+               return 0;
+         }
+
+         tmp = in8(PIXIS_BASE+PIXIS_VSPEED1);
+         tmp = (tmp & 0xF0) | (val & 0x0F);
+         out8(PIXIS_BASE+PIXIS_VSPEED1,tmp);
+         
+         return 1;
+}
+
+int set_px_corepll(ulong corepll)
+{
+         u8 tmp;
+         u8 val;
+        
+         switch((int)corepll)
+         {
+            case 20:
+               val = 0x08;
+               break;
+            case 25:
+               val = 0x0C;
+               break;
+            case 30:
+               val = 0x10;
+               break;
+            case 35:
+               val = 0x1C;
+               break;
+            case 40:
+               val = 0x14;
+               break;
+            case 45:
+               val = 0x0E;
+               break;
+            default:
+               printf("Unsupported COREPLL ratio.\n");
+               return 0;
+         }
+         
+         tmp = in8(PIXIS_BASE+PIXIS_VSPEED0);
+         tmp = (tmp & 0xE0) | (val & 0x1F);
+         out8(PIXIS_BASE+PIXIS_VSPEED0,tmp);
+         
+         return 1;
+}
+
+void read_from_px_regs(int set)
+{
+         u8 tmp, mask = 0x1C;
+         tmp = in8(PIXIS_BASE+PIXIS_VCFGEN0);
+         if (set)
+            tmp = tmp | mask;
+         else
+            tmp = tmp & ~mask;
+         out8(PIXIS_BASE+PIXIS_VCFGEN0,tmp);                        
+}
+
+void read_from_px_regs_altbank(int set)
+{
+         u8 tmp, mask = 0x04;
+         tmp = in8(PIXIS_BASE+PIXIS_VCFGEN1);
+         if (set)
+            tmp = tmp | mask;
+         else
+            tmp = tmp & ~mask;
+         out8(PIXIS_BASE+PIXIS_VCFGEN1,tmp);   
+}
+
+void set_altbank(void)
+{
+         u8 tmp;
+         tmp = in8(PIXIS_BASE+PIXIS_VBOOT);
+         tmp ^= 0x40;
+         out8(PIXIS_BASE+PIXIS_VBOOT,tmp);
+ }
+
+
+void set_px_go(void)
+{
+         u8 tmp;
+         tmp = in8(PIXIS_BASE+PIXIS_VCTL);
+         tmp = tmp & 0x1E;
+         out8(PIXIS_BASE+PIXIS_VCTL,tmp);
+         tmp = in8(PIXIS_BASE+PIXIS_VCTL);
+         tmp = tmp | 0x01;
+         out8(PIXIS_BASE+PIXIS_VCTL,tmp); 
+}
+
+void set_px_go_with_watchdog(void)
+{
+         u8 tmp;
+         tmp = in8(PIXIS_BASE+PIXIS_VCTL);
+         tmp = tmp & 0x1E;
+         out8(PIXIS_BASE+PIXIS_VCTL,tmp);
+         tmp = in8(PIXIS_BASE+PIXIS_VCTL);
+         tmp = tmp | 0x09;
+         out8(PIXIS_BASE+PIXIS_VCTL,tmp); 
+}
+
+/* This function takes the non-integral cpu:mpx pll ratio
+ * and converts it to an integer that can be used to assign
+ * FPGA register values.
+ * input: strptr i.e. argv[2]
+*/
+
+ulong strfractoint(uchar *strptr)
+{
+   int i,j,retval,intarr_len=0, decarr_len=0, mulconst, no_dec=0;
+   ulong intval =0, decval=0;
+   uchar intarr[3], decarr[3];
+
+   /* Assign the integer part to intarr[]
+    * If there is no decimal point i.e.
+    * if the ratio is an integral value
+    * simply create the intarr.
+   */
+   i=0;
+   while(strptr[i] != 46)
+   {
+      if(strptr[i] == 0)
+      {
+         no_dec = 1;
+         break;    /* Break from loop once the end of string is reached */
+      }
+      
+      intarr[i] = strptr[i];
+      i++;
+   }
+   
+   intarr_len = i; /* Assign length of integer part to intarr_len*/
+   intarr[i] = '\0'; /* */
+
+   if(no_dec)
+   {
+      mulconst=10; /* Currently needed only for single digit corepll ratios */
+      decval = 0;
+   }
+   else
+   {
+      j=0;
+      i++; /* Skipping the decimal point */
+      while ((strptr[i] > 47) && (strptr[i] < 58))
+      {
+         decarr[j] = strptr[i];
+         i++;
+         j++;
+      }
+      
+      decarr_len = j;
+      decarr[j] = '\0';
+      
+      mulconst=1;
+      for(i=0; i<decarr_len;i++)
+         mulconst = mulconst*10;
+      decval = simple_strtoul(decarr,NULL,10);      
+   }
+
+   intval = simple_strtoul(intarr,NULL,10);
+   intval = intval*mulconst;
+
+   retval = intval+decval;
+
+   return retval;
+
+}
+   
+
+#endif //CONFIG_MPC8641HPCN
+
+
+/* no generic way to do board reset. simply call soft_reset. */
+void
+do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+        char cmd;
+        ulong addr, val;
+        ulong corepll;
+        
+                
+
+#ifdef CFG_RESET_ADDRESS
+	addr = CFG_RESET_ADDRESS;
+#else
+	/*
+	 * note: when CFG_MONITOR_BASE points to a RAM address,
+	 * CFG_MONITOR_BASE - sizeof (ulong) is usually a valid
+	 * address. Better pick an address known to be invalid on your
+	 * system and assign it to CFG_RESET_ADDRESS.
+	 */
+	addr = CFG_MONITOR_BASE - sizeof (ulong);
+#endif
+
+#ifndef CONFIG_MPC8641HPCN
+
+       /* flush and disable I/D cache */
+	__asm__ __volatile__ ("mfspr	3, 1008"	::: "r3");
+	__asm__ __volatile__ ("ori	5, 5, 0xcc00"	::: "r5");
+	__asm__ __volatile__ ("ori	4, 3, 0xc00"	::: "r4");
+	__asm__ __volatile__ ("andc	5, 3, 5"	::: "r5");
+	__asm__ __volatile__ ("sync");
+	__asm__ __volatile__ ("mtspr	1008, 4");
+	__asm__ __volatile__ ("isync");
+	__asm__ __volatile__ ("sync");
+	__asm__ __volatile__ ("mtspr	1008, 5");
+	__asm__ __volatile__ ("isync");
+	__asm__ __volatile__ ("sync");
+
+        soft_restart(addr);
+
+#else /* CONFIG_MPC8641HPCN */
+        
+        if(argc > 1)
+        {
+           cmd = argv[1][1];
+           switch(cmd)
+           {
+              case 'f':    /* reset with frequency changed */
+
+                 if (argc < 5)
+                    goto my_usage;
+                 
+                 read_from_px_regs(0);
+                 
+                 val = set_px_sysclk(simple_strtoul(argv[2],NULL,10));
+                 
+                 corepll = strfractoint(argv[3]);
+                 val = val + set_px_corepll(corepll);
+                 val = val + set_px_mpxpll(simple_strtoul(argv[4],NULL,10));
+                 if(val == 3)
+                 {
+                    printf("Setting registers VCFGEN0 and VCTL\n");
+                    read_from_px_regs(1);
+                    printf("Resetting board with values from VSPEED0, VSPEED1, VCLKH, and VCLKL ....\n");
+                    set_px_go();
+                 }
+                 else
+                    goto my_usage;
+                 
+                 while(1); /* Not reached */
+                 
+              case 'l':
+                 if(argv[2][1] == 'f')
+                 {
+                    read_from_px_regs(0);
+                    read_from_px_regs_altbank(0);
+                    /* reset with frequency changed */
+                    val = set_px_sysclk(simple_strtoul(argv[3],NULL,10));
+                    
+                    corepll = strfractoint(argv[4]);
+                    val = val + set_px_corepll(corepll);
+                    val = val + set_px_mpxpll(simple_strtoul(argv[5],NULL,10));
+                    if(val == 3)
+                    {
+                       printf("Setting registers VCFGEN0, VCFGEN1, VBOOT, and VCTL\n");
+                       set_altbank();
+                       read_from_px_regs(1);
+                       read_from_px_regs_altbank(1);
+                       printf("Enabling watchdog timer on the FPGA and resetting board with values from VSPEED0, VSPEED1, VCLKH, and VCLKL to boot from the other bank ....\n");
+                       set_px_go_with_watchdog();
+                       
+                    }
+                    else
+                       goto my_usage;
+                 
+                    while(1); /* Not reached */
+                 }
+                 else /* Reset from next bank without changing frequencies */
+                 {
+                    read_from_px_regs(0);
+                    read_from_px_regs_altbank(0);
+                    if(argc > 2)
+                       goto my_usage;
+                    printf("Setting registers VCFGEN1, VBOOT, and VCTL\n");
+                    set_altbank();
+                    read_from_px_regs_altbank(1);
+                    printf("Enabling watchdog timer on the FPGA and resetting board to boot from the other bank....\n");
+                    set_px_go_with_watchdog();
+                    while(1); /* Not reached */
+                 }
+
+              default:
+                 goto my_usage;
+           }
+my_usage:
+           printf("\nUsage: reset cf <SYSCLK freq> <COREPLL ratio> <MPXPLL ratio>\n");
+           printf("       reset altbank [cf <SYSCLK freq> <COREPLL ratio> <MPXPLL ratio>]\n");
+           printf("For example:   reset cf 40 2.5 10\n");
+           printf("See MPC8641HPCN Design Workbook for valid values of command line parameters.\n");
+           return;
+        }
+        else
+           out8(PIXIS_BASE+PIXIS_RST,0);
+           
+#endif /* !CONFIG_MPC8641HPCN */
+        
+	while(1);	/* not reached */
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * Get timebase clock frequency
+ */
+unsigned long get_tbclk(void)
+{
+	sys_info_t  sys_info;
+
+	get_sys_info(&sys_info);
+	return ((sys_info.freqSystemBus + 3L) / 4L);
+
+}
+
+/* ------------------------------------------------------------------------- */
+
+#if defined(CONFIG_WATCHDOG)
+void
+watchdog_reset(void)
+{
+
+}
+#endif	/* CONFIG_WATCHDOG */
+
+/* ------------------------------------------------------------------------- */
+
+#if defined(CONFIG_DDR_ECC)
+void dma_init(void) {
+	volatile immap_t *immap = (immap_t *)CFG_IMMR;
+	volatile ccsr_dma_t *dma = &immap->im_dma;
+
+	dma->satr0 = 0x00040000;
+	dma->datr0 = 0x00040000;
+	asm("sync; isync");
+	return;
+}
+
+uint dma_check(void) {
+	volatile immap_t *immap = (immap_t *)CFG_IMMR;
+	volatile ccsr_dma_t *dma = &immap->im_dma;
+	volatile uint status = dma->sr0;
+
+	/* While the channel is busy, spin */
+	while((status & 4) == 4) {
+		status = dma->sr0;
+	}
+
+	if (status != 0) {
+		printf ("DMA Error: status = %x\n", status);
+	}
+	return status;
+}
+
+int dma_xfer(void *dest, uint count, void *src) {
+	volatile immap_t *immap = (immap_t *)CFG_IMMR;
+	volatile ccsr_dma_t *dma = &immap->im_dma;
+
+	dma->dar0 = (uint) dest;
+	dma->sar0 = (uint) src;
+	dma->bcr0 = count;
+	dma->mr0 = 0xf000004;
+	asm("sync;isync");
+	dma->mr0 = 0xf000005;
+	asm("sync;isync");
+	return dma_check();
+}
+#endif	/* CONFIG_DDR_ECC */
+
+
+#ifdef CONFIG_OF_FLAT_TREE
+void ft_cpu_setup(void *blob, bd_t *bd)
+{
+	u32 *p;
+	ulong clock;
+	int len;
+  
+	clock = bd->bi_busfreq;
+	p = ft_get_prop(blob, "/cpus/" OF_CPU "/bus-frequency", &len);
+	if (p != NULL)
+		*p = cpu_to_be32(clock);
+
+	p = ft_get_prop(blob, "/" OF_SOC "/serial@4500/clock-frequency", &len);
+	if (p != NULL)
+		*p = cpu_to_be32(clock);
+
+	p = ft_get_prop(blob, "/" OF_SOC "/serial@4600/clock-frequency", &len);
+	if (p != NULL)
+		*p = cpu_to_be32(clock);
+
+#if defined(CONFIG_MPC86XX_TSEC1)
+	p = ft_get_prop(blob, "/" OF_SOC "/ethernet@24000/address", &len);
+	memcpy(p, bd->bi_enetaddr, 6);
+#endif
+ 
+#if defined(CONFIG_MPC86XX_TSEC2)
+	p = ft_get_prop(blob, "/" OF_SOC "/ethernet@25000/address", &len);
+	memcpy(p, bd->bi_enet1addr, 6);
+#endif
+
+#if defined(CONFIG_MPC86XX_TSEC3)
+	p = ft_get_prop(blob, "/" OF_SOC "/ethernet@26000/address", &len);
+	memcpy(p, bd->bi_enet2addr, 6);
+#endif
+
+#if defined(CONFIG_MPC86XX_TSEC4)
+	p = ft_get_prop(blob, "/" OF_SOC "/ethernet@27000/address", &len);
+	 memcpy(p, bd->bi_enet3addr, 6);
+#endif
+
+}
+#endif