summaryrefslogtreecommitdiff
path: root/cpu
diff options
context:
space:
mode:
Diffstat (limited to 'cpu')
-rw-r--r--cpu/bf537/Makefile52
-rw-r--r--cpu/bf537/cache.S128
-rw-r--r--cpu/bf537/config.mk27
-rw-r--r--cpu/bf537/cpu.c227
-rw-r--r--cpu/bf537/cpu.h66
-rw-r--r--cpu/bf537/flush.S403
-rw-r--r--cpu/bf537/i2c.c460
-rw-r--r--cpu/bf537/init_sdram.S174
-rw-r--r--cpu/bf537/init_sdram_bootrom_initblock.S199
-rw-r--r--cpu/bf537/interrupt.S246
-rw-r--r--cpu/bf537/interrupts.c174
-rw-r--r--cpu/bf537/ints.c117
-rw-r--r--cpu/bf537/serial.c194
-rw-r--r--cpu/bf537/serial.h77
-rw-r--r--cpu/bf537/start.S579
-rw-r--r--cpu/bf537/start1.S38
-rw-r--r--cpu/bf537/traps.c241
-rw-r--r--cpu/bf537/video.c194
-rw-r--r--cpu/bf537/video.h25
19 files changed, 3621 insertions, 0 deletions
diff --git a/cpu/bf537/Makefile b/cpu/bf537/Makefile
new file mode 100644
index 0000000..61c7338
--- /dev/null
+++ b/cpu/bf537/Makefile
@@ -0,0 +1,52 @@
+# U-boot - Makefile
+#
+# Copyright (c) 2005 blackfin.uclinux.org
+#
+# (C) Copyright 2000-2004
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# 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 $(TOPDIR)/config.mk
+
+LIB = $(obj)lib$(CPU).a
+
+START = start.o start1.o interrupt.o cache.o flush.o init_sdram.o
+COBJS = cpu.o traps.o ints.o serial.o interrupts.o video.o i2c.o
+
+EXTRA = init_sdram_bootrom_initblock.o
+
+SRCS := $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS := $(addprefix $(obj),$(COBJS) $(SOBJS))
+START := $(addprefix $(obj),$(START))
+
+all: $(obj).depend $(START) $(LIB) $(obj).depend $(EXTRA)
+
+$(LIB): $(OBJS)
+ $(AR) $(ARFLAGS) $@ $(OBJS)
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/cpu/bf537/cache.S b/cpu/bf537/cache.S
new file mode 100644
index 0000000..5bda5bf
--- /dev/null
+++ b/cpu/bf537/cache.S
@@ -0,0 +1,128 @@
+#define ASSEMBLY
+#include <asm/linkage.h>
+#include <config.h>
+#include <asm/blackfin.h>
+
+.text
+.align 2
+ENTRY(_blackfin_icache_flush_range)
+ R2 = -32;
+ R2 = R0 & R2;
+ P0 = R2;
+ P1 = R1;
+ CSYNC;
+ 1:
+ IFLUSH[P0++];
+ CC = P0 < P1(iu);
+ IF CC JUMP 1b(bp);
+ IFLUSH[P0];
+ SSYNC;
+ RTS;
+
+ENTRY(_blackfin_dcache_flush_range)
+ R2 = -32;
+ R2 = R0 & R2;
+ P0 = R2;
+ P1 = R1;
+ CSYNC;
+1:
+ FLUSH[P0++];
+ CC = P0 < P1(iu);
+ IF CC JUMP 1b(bp);
+ FLUSH[P0];
+ SSYNC;
+ RTS;
+
+ENTRY(_icache_invalidate)
+ENTRY(_invalidate_entire_icache)
+ [--SP] = (R7:5);
+
+ P0.L = (IMEM_CONTROL & 0xFFFF);
+ P0.H = (IMEM_CONTROL >> 16);
+ R7 =[P0];
+
+ /*
+ * Clear the IMC bit , All valid bits in the instruction
+ * cache are set to the invalid state
+ */
+ BITCLR(R7, IMC_P);
+ CLI R6;
+ /* SSYNC required before invalidating cache. */
+ SSYNC;
+ .align 8;
+ [P0] = R7;
+ SSYNC;
+ STI R6;
+
+ /* Configures the instruction cache agian */
+ R6 = (IMC | ENICPLB);
+ R7 = R7 | R6;
+
+ CLI R6;
+ SSYNC;
+ .align 8;
+ [P0] = R7;
+ SSYNC;
+ STI R6;
+
+ (R7:5) =[SP++];
+ RTS;
+
+/*
+ * Invalidate the Entire Data cache by
+ * clearing DMC[1:0] bits
+ */
+ENTRY(_invalidate_entire_dcache)
+ENTRY(_dcache_invalidate)
+ [--SP] = (R7:6);
+
+ P0.L = (DMEM_CONTROL & 0xFFFF);
+ P0.H = (DMEM_CONTROL >> 16);
+ R7 =[P0];
+
+ /*
+ * Clear the DMC[1:0] bits, All valid bits in the data
+ * cache are set to the invalid state
+ */
+ BITCLR(R7, DMC0_P);
+ BITCLR(R7, DMC1_P);
+ CLI R6;
+ SSYNC;
+ .align 8;
+ [P0] = R7;
+ SSYNC;
+ STI R6;
+ /* Configures the data cache again */
+
+ R6 = (ACACHE_BCACHE | ENDCPLB | PORT_PREF0);
+ R7 = R7 | R6;
+
+ CLI R6;
+ SSYNC;
+ .align 8;
+ [P0] = R7;
+ SSYNC;
+ STI R6;
+
+ (R7:6) =[SP++];
+ RTS;
+
+ENTRY(_blackfin_dcache_invalidate_range)
+ R2 = -32;
+ R2 = R0 & R2;
+ P0 = R2;
+ P1 = R1;
+ CSYNC;
+1:
+ FLUSHINV[P0++];
+ CC = P0 < P1(iu);
+ IF CC JUMP 1b(bp);
+
+ /*
+ * If the data crosses a cache line, then we'll be pointing to
+ * the last cache line, but won't have flushed/invalidated it yet, so do
+ * one more.
+ */
+ FLUSHINV[P0];
+ SSYNC;
+ RTS;
diff --git a/cpu/bf537/config.mk b/cpu/bf537/config.mk
new file mode 100644
index 0000000..4d57d9c
--- /dev/null
+++ b/cpu/bf537/config.mk
@@ -0,0 +1,27 @@
+# U-boot - config.mk
+#
+# Copyright (c) 2005 blackfin.uclinux.org
+#
+# (C) Copyright 2000-2004
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# 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
+#
+
+PLATFORM_RELFLAGS += -mcpu=bf537 -ffixed-P5
diff --git a/cpu/bf537/cpu.c b/cpu/bf537/cpu.c
new file mode 100644
index 0000000..cb8dc3c
--- /dev/null
+++ b/cpu/bf537/cpu.c
@@ -0,0 +1,227 @@
+/*
+ * U-boot - cpu.c CPU specific functions
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ *
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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 <asm/blackfin.h>
+#include <command.h>
+#include <asm/entry.h>
+#include <asm/cplb.h>
+#include <asm/io.h>
+
+#define CACHE_ON 1
+#define CACHE_OFF 0
+
+extern unsigned int icplb_table[page_descriptor_table_size][2];
+extern unsigned int dcplb_table[page_descriptor_table_size][2];
+
+int do_reset(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+ __asm__ __volatile__("cli r3;" "P0 = %0;" "JUMP (P0);"::"r"(L1_ISRAM)
+ );
+
+ return 0;
+}
+
+/* These functions are just used to satisfy the linker */
+int cpu_init(void)
+{
+ return 0;
+}
+
+int cleanup_before_linux(void)
+{
+ return 0;
+}
+
+void icache_enable(void)
+{
+ unsigned int *I0, *I1;
+ int i, j = 0;
+
+ if ((*pCHIPID >> 28) < 2)
+ return;
+
+ /* Before enable icache, disable it first */
+ icache_disable();
+ I0 = (unsigned int *)ICPLB_ADDR0;
+ I1 = (unsigned int *)ICPLB_DATA0;
+
+ /* make sure the locked ones go in first */
+ for (i = 0; i < page_descriptor_table_size; i++) {
+ if (CPLB_LOCK & icplb_table[i][1]) {
+ debug("adding %02i %02i 0x%08x 0x%08x\n", i, j,
+ icplb_table[i][0], icplb_table[i][1]);
+ *I0++ = icplb_table[i][0];
+ *I1++ = icplb_table[i][1];
+ j++;
+ }
+ }
+
+ for (i = 0; i < page_descriptor_table_size; i++) {
+ if (!(CPLB_LOCK & icplb_table[i][1])) {
+ debug("adding %02i %02i 0x%08x 0x%08x\n", i, j,
+ icplb_table[i][0], icplb_table[i][1]);
+ *I0++ = icplb_table[i][0];
+ *I1++ = icplb_table[i][1];
+ j++;
+ if (j == 16) {
+ break;
+ }
+ }
+ }
+
+ /* Fill the rest with invalid entry */
+ if (j <= 15) {
+ for (; j < 16; j++) {
+ debug("filling %i with 0", j);
+ *I1++ = 0x0;
+ }
+
+ }
+
+ cli();
+ sync();
+ asm(" .align 8; ");
+ *(unsigned int *)IMEM_CONTROL = IMC | ENICPLB;
+ sync();
+ sti();
+}
+
+void icache_disable(void)
+{
+ if ((*pCHIPID >> 28) < 2)
+ return;
+ cli();
+ sync();
+ asm(" .align 8; ");
+ *(unsigned int *)IMEM_CONTROL &= ~(IMC | ENICPLB);
+ sync();
+ sti();
+}
+
+int icache_status(void)
+{
+ unsigned int value;
+ value = *(unsigned int *)IMEM_CONTROL;
+
+ if (value & (IMC | ENICPLB))
+ return CACHE_ON;
+ else
+ return CACHE_OFF;
+}
+
+void dcache_enable(void)
+{
+ unsigned int *I0, *I1;
+ unsigned int temp;
+ int i, j = 0;
+
+ /* Before enable dcache, disable it first */
+ dcache_disable();
+ I0 = (unsigned int *)DCPLB_ADDR0;
+ I1 = (unsigned int *)DCPLB_DATA0;
+
+ /* make sure the locked ones go in first */
+ for (i = 0; i < page_descriptor_table_size; i++) {
+ if (CPLB_LOCK & dcplb_table[i][1]) {
+ debug("adding %02i %02i 0x%08x 0x%08x\n", i, j,
+ dcplb_table[i][0], dcplb_table[i][1]);
+ *I0++ = dcplb_table[i][0];
+ *I1++ = dcplb_table[i][1];
+ j++;
+ } else {
+ debug("skip %02i %02i 0x%08x 0x%08x\n", i, j,
+ dcplb_table[i][0], dcplb_table[i][1]);
+ }
+ }
+
+ for (i = 0; i < page_descriptor_table_size; i++) {
+ if (!(CPLB_LOCK & dcplb_table[i][1])) {
+ debug("adding %02i %02i 0x%08x 0x%08x\n", i, j,
+ dcplb_table[i][0], dcplb_table[i][1]);
+ *I0++ = dcplb_table[i][0];
+ *I1++ = dcplb_table[i][1];
+ j++;
+ if (j == 16) {
+ break;
+ }
+ }
+ }
+
+ /* Fill the rest with invalid entry */
+ if (j <= 15) {
+ for (; j < 16; j++) {
+ debug("filling %i with 0", j);
+ *I1++ = 0x0;
+ }
+ }
+
+ cli();
+ temp = *(unsigned int *)DMEM_CONTROL;
+ sync();
+ asm(" .align 8; ");
+ *(unsigned int *)DMEM_CONTROL =
+ ACACHE_BCACHE | ENDCPLB | PORT_PREF0 | temp;
+ sync();
+ sti();
+}
+
+void dcache_disable(void)
+{
+ unsigned int *I0, *I1;
+ int i;
+
+ cli();
+ sync();
+ asm(" .align 8; ");
+ *(unsigned int *)DMEM_CONTROL &=
+ ~(ACACHE_BCACHE | ENDCPLB | PORT_PREF0);
+ sync();
+ sti();
+
+ /* after disable dcache,
+ * clear it so we don't confuse the next application
+ */
+ I0 = (unsigned int *)DCPLB_ADDR0;
+ I1 = (unsigned int *)DCPLB_DATA0;
+
+ for (i = 0; i < 16; i++) {
+ *I0++ = 0x0;
+ *I1++ = 0x0;
+ }
+}
+
+int dcache_status(void)
+{
+ unsigned int value;
+ value = *(unsigned int *)DMEM_CONTROL;
+
+ if (value & (ENDCPLB))
+ return CACHE_ON;
+ else
+ return CACHE_OFF;
+}
diff --git a/cpu/bf537/cpu.h b/cpu/bf537/cpu.h
new file mode 100644
index 0000000..821363e
--- /dev/null
+++ b/cpu/bf537/cpu.h
@@ -0,0 +1,66 @@
+/*
+ * U-boot - cpu.h
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ *
+ * 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
+ */
+
+#ifndef _CPU_H_
+#define _CPU_H_
+
+#include <command.h>
+
+#define INTERNAL_IRQS (32)
+#define NUM_IRQ_NODES 16
+#define DEF_INTERRUPT_FLAGS 1
+#define MAX_TIM_LOAD 0xFFFFFFFF
+
+void blackfin_irq_panic(int reason, struct pt_regs *reg);
+extern void dump(struct pt_regs *regs);
+void display_excp(void);
+asmlinkage void evt_nmi(void);
+asmlinkage void evt_exception(void);
+asmlinkage void trap(void);
+asmlinkage void evt_ivhw(void);
+asmlinkage void evt_rst(void);
+asmlinkage void evt_timer(void);
+asmlinkage void evt_evt7(void);
+asmlinkage void evt_evt8(void);
+asmlinkage void evt_evt9(void);
+asmlinkage void evt_evt10(void);
+asmlinkage void evt_evt11(void);
+asmlinkage void evt_evt12(void);
+asmlinkage void evt_evt13(void);
+asmlinkage void evt_soft_int1(void);
+asmlinkage void evt_system_call(void);
+void blackfin_irq_panic(int reason, struct pt_regs *regs);
+void blackfin_free_irq(unsigned int irq, void *dev_id);
+void call_isr(int irq, struct pt_regs *fp);
+void blackfin_do_irq(int vec, struct pt_regs *fp);
+void blackfin_init_IRQ(void);
+void blackfin_enable_irq(unsigned int irq);
+void blackfin_disable_irq(unsigned int irq);
+extern int do_reset(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]);
+int blackfin_request_irq(unsigned int irq,
+ void (*handler) (int, void *, struct pt_regs *),
+ unsigned long flags, const char *devname,
+ void *dev_id);
+void timer_init(void);
+#endif
diff --git a/cpu/bf537/flush.S b/cpu/bf537/flush.S
new file mode 100644
index 0000000..c260a8f
--- /dev/null
+++ b/cpu/bf537/flush.S
@@ -0,0 +1,403 @@
+/* Copyright (C) 2003 Analog Devices, Inc. All Rights Reserved.
+ * Copyright (C) 2004 LG SOft India. All Rights Reserved.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.
+ */
+#define ASSEMBLY
+
+#include <asm/linkage.h>
+#include <asm/cplb.h>
+#include <config.h>
+#include <asm/blackfin.h>
+
+.text
+
+/* This is an external function being called by the user
+ * application through __flush_cache_all. Currently this function
+ * serves the purpose of flushing all the pending writes in
+ * in the instruction cache.
+ */
+
+ENTRY(_flush_instruction_cache)
+ [--SP] = ( R7:6, P5:4 );
+ LINK 12;
+ SP += -12;
+ P5.H = (ICPLB_ADDR0 >> 16);
+ P5.L = (ICPLB_ADDR0 & 0xFFFF);
+ P4.H = (ICPLB_DATA0 >> 16);
+ P4.L = (ICPLB_DATA0 & 0xFFFF);
+ R7 = CPLB_VALID | CPLB_L1_CHBL;
+ R6 = 16;
+inext: R0 = [P5++];
+ R1 = [P4++];
+ [--SP] = RETS;
+ CALL _icplb_flush; /* R0 = page, R1 = data*/
+ RETS = [SP++];
+iskip: R6 += -1;
+ CC = R6;
+ IF CC JUMP inext;
+ SSYNC;
+ SP += 12;
+ UNLINK;
+ ( R7:6, P5:4 ) = [SP++];
+ RTS;
+
+/* This is an internal function to flush all pending
+ * writes in the cache associated with a particular ICPLB.
+ *
+ * R0 - page's start address
+ * R1 - CPLB's data field.
+ */
+
+.align 2
+ENTRY(_icplb_flush)
+ [--SP] = ( R7:0, P5:0 );
+ [--SP] = LC0;
+ [--SP] = LT0;
+ [--SP] = LB0;
+ [--SP] = LC1;
+ [--SP] = LT1;
+ [--SP] = LB1;
+
+ /* If it's a 1K or 4K page, then it's quickest to
+ * just systematically flush all the addresses in
+ * the page, regardless of whether they're in the
+ * cache, or dirty. If it's a 1M or 4M page, there
+ * are too many addresses, and we have to search the
+ * cache for lines corresponding to the page.
+ */
+
+ CC = BITTST(R1, 17); /* 1MB or 4MB */
+ IF !CC JUMP iflush_whole_page;
+
+ /* We're only interested in the page's size, so extract
+ * this from the CPLB (bits 17:16), and scale to give an
+ * offset into the page_size and page_prefix tables.
+ */
+
+ R1 <<= 14;
+ R1 >>= 30;
+ R1 <<= 2;
+
+ /* We can also determine the sub-bank used, because this is
+ * taken from bits 13:12 of the address.
+ */
+
+ R3 = ((12<<8)|2); /* Extraction pattern */
+ nop; /* Anamoly 05000209 */
+ R4 = EXTRACT(R0, R3.L) (Z); /* Extract bits */
+
+ /* Save in extraction pattern for later deposit. */
+ R3.H = R4.L << 0;
+
+ /* So:
+ * R0 = Page start
+ * R1 = Page length (actually, offset into size/prefix tables)
+ * R3 = sub-bank deposit values
+ *
+ * The cache has 2 Ways, and 64 sets, so we iterate through
+ * the sets, accessing the tag for each Way, for our Bank and
+ * sub-bank, looking for dirty, valid tags that match our
+ * address prefix.
+ */
+
+ P5.L = (ITEST_COMMAND & 0xFFFF);
+ P5.H = (ITEST_COMMAND >> 16);
+ P4.L = (ITEST_DATA0 & 0xFFFF);
+ P4.H = (ITEST_DATA0 >> 16);
+
+ P0.L = page_prefix_table;
+ P0.H = page_prefix_table;
+ P1 = R1;
+ R5 = 0; /* Set counter*/
+ P0 = P1 + P0;
+ R4 = [P0]; /* This is the address prefix*/
+
+ /* We're reading (bit 1==0) the tag (bit 2==0), and we
+ * don't care about which double-word, since we're only
+ * fetching tags, so we only have to set Set, Bank,
+ * Sub-bank and Way.
+ */
+
+ P2 = 4;
+ LSETUP (ifs1, ife1) LC1 = P2;
+ifs1: P0 = 32; /* iterate over all sets*/
+ LSETUP (ifs0, ife0) LC0 = P0;
+ifs0: R6 = R5 << 5; /* Combine set*/
+ R6.H = R3.H << 0 ; /* and sub-bank*/
+ [P5] = R6; /* Issue Command*/
+ SSYNC; /* CSYNC will not work here :(*/
+ R7 = [P4]; /* and read Tag.*/
+ CC = BITTST(R7, 0); /* Check if valid*/
+ IF !CC JUMP ifskip; /* and skip if not.*/
+
+ /* Compare against the page address. First, plant bits 13:12
+ * into the tag, since those aren't part of the returned data.
+ */
+
+ R7 = DEPOSIT(R7, R3); /* set 13:12*/
+ R1 = R7 & R4; /* Mask off lower bits*/
+ CC = R1 == R0; /* Compare against page start.*/
+ IF !CC JUMP ifskip; /* Skip it if it doesn't match.*/
+
+ /* Tag address matches against page, so this is an entry
+ * we must flush.
+ */
+
+ R7 >>= 10; /* Mask off the non-address bits*/
+ R7 <<= 10;
+ P3 = R7;
+ IFLUSH [P3]; /* And flush the entry*/
+ifskip:
+ife0: R5 += 1; /* Advance to next Set*/
+ife1: NOP;
+
+ifinished:
+ SSYNC; /* Ensure the data gets out to mem.*/
+
+ /*Finished. Restore context.*/
+ LB1 = [SP++];
+ LT1 = [SP++];
+ LC1 = [SP++];
+ LB0 = [SP++];
+ LT0 = [SP++];
+ LC0 = [SP++];
+ ( R7:0, P5:0 ) = [SP++];
+ RTS;
+
+iflush_whole_page:
+ /* It's a 1K or 4K page, so quicker to just flush the
+ * entire page.
+ */
+
+ P1 = 32; /* For 1K pages*/
+ P2 = P1 << 2; /* For 4K pages*/
+ P0 = R0; /* Start of page*/
+ CC = BITTST(R1, 16); /* Whether 1K or 4K*/
+ IF CC P1 = P2;
+ P1 += -1; /* Unroll one iteration*/
+ SSYNC;
+ IFLUSH [P0++]; /* because CSYNC can't end loops.*/
+ LSETUP (isall, ieall) LC0 = P1;
+isall:IFLUSH [P0++];
+ieall: NOP;
+ SSYNC;
+ JUMP ifinished;
+
+/* This is an external function being called by the user
+ * application through __flush_cache_all. Currently this function
+ * serves the purpose of flushing all the pending writes in
+ * in the data cache.
+ */
+
+ENTRY(_flush_data_cache)
+ [--SP] = ( R7:6, P5:4 );
+ LINK 12;
+ SP += -12;
+ P5.H = (DCPLB_ADDR0 >> 16);
+ P5.L = (DCPLB_ADDR0 & 0xFFFF);
+ P4.H = (DCPLB_DATA0 >> 16);
+ P4.L = (DCPLB_DATA0 & 0xFFFF);
+ R7 = CPLB_VALID | CPLB_L1_CHBL | CPLB_DIRTY (Z);
+ R6 = 16;
+next: R0 = [P5++];
+ R1 = [P4++];
+ CC = BITTST(R1, 14); /* Is it write-through?*/
+ IF CC JUMP skip; /* If so, ignore it.*/
+ R2 = R1 & R7; /* Is it a dirty, cached page?*/
+ CC = R2;
+ IF !CC JUMP skip; /* If not, ignore it.*/
+ [--SP] = RETS;
+ CALL _dcplb_flush; /* R0 = page, R1 = data*/
+ RETS = [SP++];
+skip: R6 += -1;
+ CC = R6;
+ IF CC JUMP next;
+ SSYNC;
+ SP += 12;
+ UNLINK;
+ ( R7:6, P5:4 ) = [SP++];
+ RTS;
+
+/* This is an internal function to flush all pending
+ * writes in the cache associated with a particular DCPLB.
+ *
+ * R0 - page's start address
+ * R1 - CPLB's data field.
+ */
+
+.align 2
+ENTRY(_dcplb_flush)
+ [--SP] = ( R7:0, P5:0 );
+ [--SP] = LC0;
+ [--SP] = LT0;
+ [--SP] = LB0;
+ [--SP] = LC1;
+ [--SP] = LT1;
+ [--SP] = LB1;
+
+ /* If it's a 1K or 4K page, then it's quickest to
+ * just systematically flush all the addresses in
+ * the page, regardless of whether they're in the
+ * cache, or dirty. If it's a 1M or 4M page, there
+ * are too many addresses, and we have to search the
+ * cache for lines corresponding to the page.
+ */
+
+ CC = BITTST(R1, 17); /* 1MB or 4MB */
+ IF !CC JUMP dflush_whole_page;
+
+ /* We're only interested in the page's size, so extract
+ * this from the CPLB (bits 17:16), and scale to give an
+ * offset into the page_size and page_prefix tables.
+ */
+
+ R1 <<= 14;
+ R1 >>= 30;
+ R1 <<= 2;
+
+ /* The page could be mapped into Bank A or Bank B, depending
+ * on (a) whether both banks are configured as cache, and
+ * (b) on whether address bit A[x] is set. x is determined
+ * by DCBS in DMEM_CONTROL
+ */
+
+ R2 = 0; /* Default to Bank A (Bank B would be 1)*/
+
+ P0.L = (DMEM_CONTROL & 0xFFFF);
+ P0.H = (DMEM_CONTROL >> 16);
+
+ R3 = [P0]; /* If Bank B is not enabled as cache*/
+ CC = BITTST(R3, 2); /* then Bank A is our only option.*/
+ IF CC JUMP bank_chosen;
+
+ R4 = 1<<14; /* If DCBS==0, use A[14].*/
+ R5 = R4 << 7; /* If DCBS==1, use A[23];*/
+ CC = BITTST(R3, 4);
+ IF CC R4 = R5; /* R4 now has either bit 14 or bit 23 set.*/
+ R5 = R0 & R4; /* Use it to test the Page address*/
+ CC = R5; /* and if that bit is set, we use Bank B,*/
+ R2 = CC; /* else we use Bank A.*/
+ R2 <<= 23; /* The Bank selection's at posn 23.*/
+
+bank_chosen:
+
+ /* We can also determine the sub-bank used, because this is
+ * taken from bits 13:12 of the address.
+ */
+
+ R3 = ((12<<8)|2); /* Extraction pattern */
+ nop; /*Anamoly 05000209*/
+ R4 = EXTRACT(R0, R3.L) (Z); /* Extract bits*/
+ /* Save in extraction pattern for later deposit.*/
+ R3.H = R4.L << 0;
+
+ /* So:
+ * R0 = Page start
+ * R1 = Page length (actually, offset into size/prefix tables)
+ * R2 = Bank select mask
+ * R3 = sub-bank deposit values
+ *
+ * The cache has 2 Ways, and 64 sets, so we iterate through
+ * the sets, accessing the tag for each Way, for our Bank and
+ * sub-bank, looking for dirty, valid tags that match our
+ * address prefix.
+ */
+
+ P5.L = (DTEST_COMMAND & 0xFFFF);
+ P5.H = (DTEST_COMMAND >> 16);
+ P4.L = (DTEST_DATA0 & 0xFFFF);
+ P4.H = (DTEST_DATA0 >> 16);
+
+ P0.L = page_prefix_table;
+ P0.H = page_prefix_table;
+ P1 = R1;
+ R5 = 0; /* Set counter*/
+ P0 = P1 + P0;
+ R4 = [P0]; /* This is the address prefix*/
+
+
+ /* We're reading (bit 1==0) the tag (bit 2==0), and we
+ * don't care about which double-word, since we're only
+ * fetching tags, so we only have to set Set, Bank,
+ * Sub-bank and Way.
+ */
+
+ P2 = 2;
+ LSETUP (fs1, fe1) LC1 = P2;
+fs1: P0 = 64; /* iterate over all sets*/
+ LSETUP (fs0, fe0) LC0 = P0;
+fs0: R6 = R5 << 5; /* Combine set*/
+ R6.H = R3.H << 0 ; /* and sub-bank*/
+ R6 = R6 | R2; /* and Bank. Leave Way==0 at first.*/
+ BITSET(R6,14);
+ [P5] = R6; /* Issue Command*/
+ SSYNC;
+ R7 = [P4]; /* and read Tag.*/
+ CC = BITTST(R7, 0); /* Check if valid*/
+ IF !CC JUMP fskip; /* and skip if not.*/
+ CC = BITTST(R7, 1); /* Check if dirty*/
+ IF !CC JUMP fskip; /* and skip if not.*/
+
+ /* Compare against the page address. First, plant bits 13:12
+ * into the tag, since those aren't part of the returned data.
+ */
+
+ R7 = DEPOSIT(R7, R3); /* set 13:12*/
+ R1 = R7 & R4; /* Mask off lower bits*/
+ CC = R1 == R0; /* Compare against page start.*/
+ IF !CC JUMP fskip; /* Skip it if it doesn't match.*/
+
+ /* Tag address matches against page, so this is an entry
+ * we must flush.
+ */
+
+ R7 >>= 10; /* Mask off the non-address bits*/
+ R7 <<= 10;
+ P3 = R7;
+ SSYNC;
+ FLUSHINV [P3]; /* And flush the entry*/
+fskip:
+fe0: R5 += 1; /* Advance to next Set*/
+fe1: BITSET(R2, 26); /* Go to next Way.*/
+
+dfinished:
+ SSYNC; /* Ensure the data gets out to mem.*/
+
+ /*Finished. Restore context.*/
+ LB1 = [SP++];
+ LT1 = [SP++];
+ LC1 = [SP++];
+ LB0 = [SP++];
+ LT0 = [SP++];
+ LC0 = [SP++];
+ ( R7:0, P5:0 ) = [SP++];
+ RTS;
+
+dflush_whole_page:
+
+ /* It's a 1K or 4K page, so quicker to just flush the
+ * entire page.
+ */
+
+ P1 = 32; /* For 1K pages*/
+ P2 = P1 << 2; /* For 4K pages*/
+ P0 = R0; /* Start of page*/
+ CC = BITTST(R1, 16); /* Whether 1K or 4K*/
+ IF CC P1 = P2;
+ P1 += -1; /* Unroll one iteration*/
+ SSYNC;
+ FLUSHINV [P0++]; /* because CSYNC can't end loops.*/
+ LSETUP (eall, eall) LC0 = P1;
+eall: FLUSHINV [P0++];
+ SSYNC;
+ JUMP dfinished;
+
+.align 4;
+page_prefix_table:
+.byte4 0xFFFFFC00; /* 1K */
+.byte4 0xFFFFF000; /* 4K */
+.byte4 0xFFF00000; /* 1M */
+.byte4 0xFFC00000; /* 4M */
+.page_prefix_table.end:
diff --git a/cpu/bf537/i2c.c b/cpu/bf537/i2c.c
new file mode 100644
index 0000000..3b0d026
--- /dev/null
+++ b/cpu/bf537/i2c.c
@@ -0,0 +1,460 @@
+/****************************************************************
+ * $ID: i2c.c 24 Oct 2006 12:00:00 +0800 $ *
+ * *
+ * Description: *
+ * *
+ * Maintainer: sonicz <sonic.zhang@analog.com> *
+ * *
+ * CopyRight (c) 2006 Analog Device *
+ * All rights reserved. *
+ * *
+ * This file is free software; *
+ * you are free to modify and/or redistribute it *
+ * under the terms of the GNU General Public Licence (GPL).*
+ * *
+ ****************************************************************/
+
+#include <common.h>
+
+#ifdef CONFIG_HARD_I2C
+
+#include <asm/blackfin.h>
+#include <i2c.h>
+#include <asm/io.h>
+
+#define bfin_read16(addr) ({ unsigned __v; \
+ __asm__ __volatile__ (\
+ "%0 = w[%1] (z);\n\t"\
+ : "=d"(__v) : "a"(addr)); (unsigned short)__v; })
+
+#define bfin_write16(addr,val) ({\
+ __asm__ __volatile__ (\
+ "w[%0] = %1;\n\t"\
+ : : "a"(addr) , "d"(val) : "memory");})
+
+/* Two-Wire Interface (0xFFC01400 - 0xFFC014FF) */
+#define bfin_read_TWI_CLKDIV() bfin_read16(TWI_CLKDIV)
+#define bfin_write_TWI_CLKDIV(val) bfin_write16(TWI_CLKDIV,val)
+#define bfin_read_TWI_CONTROL() bfin_read16(TWI_CONTROL)
+#define bfin_write_TWI_CONTROL(val) bfin_write16(TWI_CONTROL,val)
+#define bfin_read_TWI_SLAVE_CTL() bfin_read16(TWI_SLAVE_CTL)
+#define bfin_write_TWI_SLAVE_CTL(val) bfin_write16(TWI_SLAVE_CTL,val)
+#define bfin_read_TWI_SLAVE_STAT() bfin_read16(TWI_SLAVE_STAT)
+#define bfin_write_TWI_SLAVE_STAT(val) bfin_write16(TWI_SLAVE_STAT,val)
+#define bfin_read_TWI_SLAVE_ADDR() bfin_read16(TWI_SLAVE_ADDR)
+#define bfin_write_TWI_SLAVE_ADDR(val) bfin_write16(TWI_SLAVE_ADDR,val)
+#define bfin_read_TWI_MASTER_CTL() bfin_read16(TWI_MASTER_CTL)
+#define bfin_write_TWI_MASTER_CTL(val) bfin_write16(TWI_MASTER_CTL,val)
+#define bfin_read_TWI_MASTER_STAT() bfin_read16(TWI_MASTER_STAT)
+#define bfin_write_TWI_MASTER_STAT(val) bfin_write16(TWI_MASTER_STAT,val)
+#define bfin_read_TWI_MASTER_ADDR() bfin_read16(TWI_MASTER_ADDR)
+#define bfin_write_TWI_MASTER_ADDR(val) bfin_write16(TWI_MASTER_ADDR,val)
+#define bfin_read_TWI_INT_STAT() bfin_read16(TWI_INT_STAT)
+#define bfin_write_TWI_INT_STAT(val) bfin_write16(TWI_INT_STAT,val)
+#define bfin_read_TWI_INT_MASK() bfin_read16(TWI_INT_MASK)
+#define bfin_write_TWI_INT_MASK(val) bfin_write16(TWI_INT_MASK,val)
+#define bfin_read_TWI_FIFO_CTL() bfin_read16(TWI_FIFO_CTL)
+#define bfin_write_TWI_FIFO_CTL(val) bfin_write16(TWI_FIFO_CTL,val)
+#define bfin_read_TWI_FIFO_STAT() bfin_read16(TWI_FIFO_STAT)
+#define bfin_write_TWI_FIFO_STAT(val) bfin_write16(TWI_FIFO_STAT,val)
+#define bfin_read_TWI_XMT_DATA8() bfin_read16(TWI_XMT_DATA8)
+#define bfin_write_TWI_XMT_DATA8(val) bfin_write16(TWI_XMT_DATA8,val)
+#define bfin_read_TWI_XMT_DATA16() bfin_read16(TWI_XMT_DATA16)
+#define bfin_write_TWI_XMT_DATA16(val) bfin_write16(TWI_XMT_DATA16,val)
+#define bfin_read_TWI_RCV_DATA8() bfin_read16(TWI_RCV_DATA8)
+#define bfin_write_TWI_RCV_DATA8(val) bfin_write16(TWI_RCV_DATA8,val)
+#define bfin_read_TWI_RCV_DATA16() bfin_read16(TWI_RCV_DATA16)
+#define bfin_write_TWI_RCV_DATA16(val) bfin_write16(TWI_RCV_DATA16,val)
+
+#ifdef DEBUG_I2C
+#define PRINTD(fmt,args...) do { \
+ DECLARE_GLOBAL_DATA_PTR; \
+ if (gd->have_console) \
+ printf(fmt ,##args); \
+ } while (0)
+#else
+#define PRINTD(fmt,args...)
+#endif
+
+#ifndef CONFIG_TWICLK_KHZ
+#define CONFIG_TWICLK_KHZ 50
+#endif
+
+/* All transfers are described by this data structure */
+struct i2c_msg {
+ u16 addr; /* slave address */
+ u16 flags;
+#define I2C_M_STOP 0x2
+#define I2C_M_RD 0x1
+ u16 len; /* msg length */
+ u8 *buf; /* pointer to msg data */
+};
+
+/**
+ * i2c_reset: - reset the host controller
+ *
+ */
+
+static void i2c_reset(void)
+{
+ /* Disable TWI */
+ bfin_write_TWI_CONTROL(0);
+ sync();
+
+ /* Set TWI internal clock as 10MHz */
+ bfin_write_TWI_CONTROL(((get_sclk() / 1024 / 1024 + 5) / 10) & 0x7F);
+
+ /* Set Twi interface clock as specified */
+ if (CONFIG_TWICLK_KHZ > 400)
+ bfin_write_TWI_CLKDIV(((5 * 1024 / 400) << 8) | ((5 * 1024 /
+ 400) & 0xFF));
+ else
+ bfin_write_TWI_CLKDIV(((5 * 1024 /
+ CONFIG_TWICLK_KHZ) << 8) | ((5 * 1024 /
+ CONFIG_TWICLK_KHZ)
+ & 0xFF));
+
+ /* Enable TWI */
+ bfin_write_TWI_CONTROL(bfin_read_TWI_CONTROL() | TWI_ENA);
+ sync();
+}
+
+int wait_for_completion(struct i2c_msg *msg, int timeout_count)
+{
+ unsigned short twi_int_stat;
+ unsigned short mast_stat;
+ int i;
+
+ for (i = 0; i < timeout_count; i++) {
+ twi_int_stat = bfin_read_TWI_INT_STAT();
+ mast_stat = bfin_read_TWI_MASTER_STAT();
+
+ if (XMTSERV & twi_int_stat) {
+ /* Transmit next data */
+ if (msg->len > 0) {
+ bfin_write_TWI_XMT_DATA8(*(msg->buf++));
+ msg->len--;
+ } else if (msg->flags & I2C_M_STOP)
+ bfin_write_TWI_MASTER_CTL
+ (bfin_read_TWI_MASTER_CTL() | STOP);
+ sync();
+ /* Clear status */
+ bfin_write_TWI_INT_STAT(XMTSERV);
+ sync();
+ i = 0;
+ }
+ if (RCVSERV & twi_int_stat) {
+ if (msg->len > 0) {
+ /* Receive next data */
+ *(msg->buf++) = bfin_read_TWI_RCV_DATA8();
+ msg->len--;
+ } else if (msg->flags & I2C_M_STOP) {
+ bfin_write_TWI_MASTER_CTL
+ (bfin_read_TWI_MASTER_CTL() | STOP);
+ sync();
+ }
+ /* Clear interrupt source */
+ bfin_write_TWI_INT_STAT(RCVSERV);
+ sync();
+ i = 0;
+ }
+ if (MERR & twi_int_stat) {
+ bfin_write_TWI_INT_STAT(MERR);
+ bfin_write_TWI_INT_MASK(0);
+ bfin_write_TWI_MASTER_STAT(0x3e);
+ bfin_write_TWI_MASTER_CTL(0);
+ sync();
+ /*
+ * if both err and complete int stats are set,
+ * return proper results.
+ */
+ if (MCOMP & twi_int_stat) {
+ bfin_write_TWI_INT_STAT(MCOMP);
+ bfin_write_TWI_INT_MASK(0);
+ bfin_write_TWI_MASTER_CTL(0);
+ sync();
+ /*
+ * If it is a quick transfer,
+ * only address bug no data, not an err.
+ */
+ if (msg->len == 0 && mast_stat & BUFRDERR)
+ return 0;
+ /*
+ * If address not acknowledged return -3,
+ * else return 0.
+ */
+ else if (!(mast_stat & ANAK))
+ return 0;
+ else
+ return -3;
+ }
+ return -1;
+ }
+ if (MCOMP & twi_int_stat) {
+ bfin_write_TWI_INT_STAT(MCOMP);
+ sync();
+ bfin_write_TWI_INT_MASK(0);
+ bfin_write_TWI_MASTER_CTL(0);
+ sync();
+ return 0;
+ }
+ }
+ if (msg->flags & I2C_M_RD)
+ return -4;
+ else
+ return -2;
+}
+
+/**
+ * i2c_transfer: - Transfer one byte over the i2c bus
+ *
+ * This function can tranfer a byte over the i2c bus in both directions.
+ * It is used by the public API functions.
+ *
+ * @return: 0: transfer successful
+ * -1: transfer fail
+ * -2: transmit timeout
+ * -3: ACK missing
+ * -4: receive timeout
+ * -5: controller not ready
+ */
+int i2c_transfer(struct i2c_msg *msg)
+{
+ int ret = 0;
+ int timeout_count = 10000;
+ int len = msg->len;
+
+ if (!(bfin_read_TWI_CONTROL() & TWI_ENA)) {
+ ret = -5;
+ goto transfer_error;
+ }
+
+ while (bfin_read_TWI_MASTER_STAT() & BUSBUSY) ;
+
+ /* Set Transmit device address */
+ bfin_write_TWI_MASTER_ADDR(msg->addr);
+
+ /*
+ * FIFO Initiation.
+ * Data in FIFO should be discarded before start a new operation.
+ */
+ bfin_write_TWI_FIFO_CTL(0x3);
+ sync();
+ bfin_write_TWI_FIFO_CTL(0);
+ sync();
+
+ if (!(msg->flags & I2C_M_RD)) {
+ /* Transmit first data */
+ if (msg->len > 0) {
+ PRINTD("1 in i2c_transfer: buf=%d, len=%d\n", *msg->buf,
+ len);
+ bfin_write_TWI_XMT_DATA8(*(msg->buf++));
+ msg->len--;
+ sync();
+ }
+ }
+
+ /* clear int stat */
+ bfin_write_TWI_INT_STAT(MERR | MCOMP | XMTSERV | RCVSERV);
+
+ /* Interrupt mask . Enable XMT, RCV interrupt */
+ bfin_write_TWI_INT_MASK(MCOMP | MERR |
+ ((msg->flags & I2C_M_RD) ? RCVSERV : XMTSERV));
+ sync();
+
+ if (len > 0 && len <= 255)
+ bfin_write_TWI_MASTER_CTL((len << 6));
+ else if (msg->len > 255) {
+ bfin_write_TWI_MASTER_CTL((0xff << 6));
+ msg->flags &= I2C_M_STOP;
+ } else
+ bfin_write_TWI_MASTER_CTL(0);
+
+ /* Master enable */
+ bfin_write_TWI_MASTER_CTL(bfin_read_TWI_MASTER_CTL() | MEN |
+ ((msg->flags & I2C_M_RD)
+ ? MDIR : 0) | ((CONFIG_TWICLK_KHZ >
+ 100) ? FAST : 0));
+ sync();
+
+ ret = wait_for_completion(msg, timeout_count);
+ PRINTD("3 in i2c_transfer: ret=%d\n", ret);
+
+transfer_error:
+ switch (ret) {
+ case 1:
+ PRINTD(("i2c_transfer: error: transfer fail\n"));
+ break;
+ case 2:
+ PRINTD(("i2c_transfer: error: transmit timeout\n"));
+ break;
+ case 3:
+ PRINTD(("i2c_transfer: error: ACK missing\n"));
+ break;
+ case 4:
+ PRINTD(("i2c_transfer: error: receive timeout\n"));
+ break;
+ case 5:
+ PRINTD(("i2c_transfer: error: controller not ready\n"));
+ i2c_reset();
+ break;
+ default:
+ break;
+ }
+ return ret;
+
+}
+
+/* ---------------------------------------------------------------------*/
+/* API Functions */
+/* ---------------------------------------------------------------------*/
+
+void i2c_init(int speed, int slaveaddr)
+{
+ i2c_reset();
+}
+
+/**
+ * i2c_probe: - Test if a chip answers for a given i2c address
+ *
+ * @chip: address of the chip which is searched for
+ * @return: 0 if a chip was found, -1 otherwhise
+ */
+
+int i2c_probe(uchar chip)
+{
+ struct i2c_msg msg;
+ u8 probebuf;
+
+ i2c_reset();
+
+ probebuf = 0;
+ msg.addr = chip;
+ msg.flags = 0;
+ msg.len = 1;
+ msg.buf = &probebuf;
+ if (i2c_transfer(&msg))
+ return -1;
+
+ msg.addr = chip;
+ msg.flags = I2C_M_RD;
+ msg.len = 1;
+ msg.buf = &probebuf;
+ if (i2c_transfer(&msg))
+ return -1;
+
+ return 0;
+}
+
+/**
+ * i2c_read: - Read multiple bytes from an i2c device
+ *
+ * chip: I2C chip address, range 0..127
+ * addr: Memory (register) address within the chip
+ * alen: Number of bytes to use for addr (typically 1, 2 for larger
+ * memories, 0 for register type devices with only one
+ * register)
+ * buffer: Where to read/write the data
+ * len: How many bytes to read/write
+ *
+ * Returns: 0 on success, not 0 on failure
+ */
+
+int i2c_read(uchar chip, uint addr, int alen, uchar * buffer, int len)
+{
+ struct i2c_msg msg;
+ u8 addr_bytes[3]; /* lowest...highest byte of data address */
+
+ PRINTD("i2c_read: chip=0x%x, addr=0x%x, alen=0x%x, len=0x%x\n", chip,
+ addr, alen, len);
+
+ if (alen > 0) {
+ addr_bytes[0] = (u8) ((addr >> 0) & 0x000000FF);
+ addr_bytes[1] = (u8) ((addr >> 8) & 0x000000FF);
+ addr_bytes[2] = (u8) ((addr >> 16) & 0x000000FF);
+ msg.addr = chip;
+ msg.flags = 0;
+ msg.len = alen;
+ msg.buf = addr_bytes;
+ if (i2c_transfer(&msg))
+ return -1;
+ }
+
+ /* start read sequence */
+ PRINTD(("i2c_read: start read sequence\n"));
+ msg.addr = chip;
+ msg.flags = I2C_M_RD;
+ msg.len = len;
+ msg.buf = buffer;
+ if (i2c_transfer(&msg))
+ return -1;
+
+ return 0;
+}
+
+/**
+ * i2c_write: - Write multiple bytes to an i2c device
+ *
+ * chip: I2C chip address, range 0..127
+ * addr: Memory (register) address within the chip
+ * alen: Number of bytes to use for addr (typically 1, 2 for larger
+ * memories, 0 for register type devices with only one
+ * register)
+ * buffer: Where to read/write the data
+ * len: How many bytes to read/write
+ *
+ * Returns: 0 on success, not 0 on failure
+ */
+
+int i2c_write(uchar chip, uint addr, int alen, uchar * buffer, int len)
+{
+ struct i2c_msg msg;
+ u8 addr_bytes[3]; /* lowest...highest byte of data address */
+
+ PRINTD
+ ("i2c_write: chip=0x%x, addr=0x%x, alen=0x%x, len=0x%x, buf0=0x%x\n",
+ chip, addr, alen, len, buffer[0]);
+
+ /* chip address write */
+ if (alen > 0) {
+ addr_bytes[0] = (u8) ((addr >> 0) & 0x000000FF);
+ addr_bytes[1] = (u8) ((addr >> 8) & 0x000000FF);
+ addr_bytes[2] = (u8) ((addr >> 16) & 0x000000FF);
+ msg.addr = chip;
+ msg.flags = 0;
+ msg.len = alen;
+ msg.buf = addr_bytes;
+ if (i2c_transfer(&msg))
+ return -1;
+ }
+
+ /* start read sequence */
+ PRINTD(("i2c_write: start write sequence\n"));
+ msg.addr = chip;
+ msg.flags = 0;
+ msg.len = len;
+ msg.buf = buffer;
+ if (i2c_transfer(&msg))
+ return -1;
+
+ return 0;
+
+}
+
+uchar i2c_reg_read(uchar chip, uchar reg)
+{
+ uchar buf;
+
+ PRINTD("i2c_reg_read: chip=0x%02x, reg=0x%02x\n", chip, reg);
+ i2c_read(chip, reg, 0, &buf, 1);
+ return (buf);
+}
+
+void i2c_reg_write(uchar chip, uchar reg, uchar val)
+{
+ PRINTD("i2c_reg_write: chip=0x%02x, reg=0x%02x, val=0x%02x\n", chip,
+ reg, val);
+ i2c_write(chip, reg, 0, &val, 1);
+}
+
+#endif /* CONFIG_HARD_I2C */
diff --git a/cpu/bf537/init_sdram.S b/cpu/bf537/init_sdram.S
new file mode 100644
index 0000000..897a589
--- /dev/null
+++ b/cpu/bf537/init_sdram.S
@@ -0,0 +1,174 @@
+#define ASSEMBLY
+
+#include <linux/config.h>
+#include <config.h>
+#include <asm/blackfin.h>
+#include <asm/mem_init.h>
+.global init_sdram;
+
+#if (BFIN_BOOT_MODE != BF537_UART_BOOT)
+#if (CONFIG_CCLK_DIV == 1)
+#define CONFIG_CCLK_ACT_DIV CCLK_DIV1
+#endif
+#if (CONFIG_CCLK_DIV == 2)
+#define CONFIG_CCLK_ACT_DIV CCLK_DIV2
+#endif
+#if (CONFIG_CCLK_DIV == 4)
+#define CONFIG_CCLK_ACT_DIV CCLK_DIV4
+#endif
+#if (CONFIG_CCLK_DIV == 8)
+#define CONFIG_CCLK_ACT_DIV CCLK_DIV8
+#endif
+#ifndef CONFIG_CCLK_ACT_DIV
+#define CONFIG_CCLK_ACT_DIV CONFIG_CCLK_DIV_not_defined_properly
+#endif
+#endif
+
+init_sdram:
+ [--SP] = ASTAT;
+ [--SP] = RETS;
+ [--SP] = (R7:0);
+ [--SP] = (P5:0);
+
+#if (BFIN_BOOT_MODE == BF537_SPI_MASTER_BOOT)
+ p0.h = hi(SIC_IWR);
+ p0.l = lo(SIC_IWR);
+ r0.l = 0x1;
+ w[p0] = r0.l;
+ SSYNC;
+
+ p0.h = hi(SPI_BAUD);
+ p0.l = lo(SPI_BAUD);
+ r0.l = CONFIG_SPI_BAUD;
+ w[p0] = r0.l;
+ SSYNC;
+#endif
+
+#if (BFIN_BOOT_MODE != BF537_UART_BOOT)
+
+#ifdef CONFIG_BF537
+ /* Enable PHY CLK buffer output */
+ p0.h = hi(VR_CTL);
+ p0.l = lo(VR_CTL);
+ r0.l = w[p0];
+ bitset(r0, 14);
+ w[p0] = r0.l;
+ ssync;
+#endif
+ /*
+ * PLL_LOCKCNT - how many SCLK Cycles to delay while PLL becomes stable
+ */
+ p0.h = hi(PLL_LOCKCNT);
+ p0.l = lo(PLL_LOCKCNT);
+ r0 = 0x300(Z);
+ w[p0] = r0.l;
+ ssync;
+
+ /*
+ * Put SDRAM in self-refresh, incase anything is running
+ */
+ P2.H = hi(EBIU_SDGCTL);
+ P2.L = lo(EBIU_SDGCTL);
+ R0 = [P2];
+ BITSET (R0, 24);
+ [P2] = R0;
+ SSYNC;
+
+ /*
+ * Set PLL_CTL with the value that we calculate in R0
+ * - [14:09] = MSEL[5:0] : CLKIN / VCO multiplication factors
+ * - [8] = BYPASS : BYPASS the PLL, run CLKIN into CCLK/SCLK
+ * - [7] = output delay (add 200ps of delay to mem signals)
+ * - [6] = input delay (add 200ps of input delay to mem signals)
+ * - [5] = PDWN : 1=All Clocks off
+ * - [3] = STOPCK : 1=Core Clock off
+ * - [1] = PLL_OFF : 1=Disable Power to PLL
+ * - [0] = DF : 1=Pass CLKIN/2 to PLL / 0=Pass CLKIN to PLL
+ * all other bits set to zero
+ */
+
+ r0 = CONFIG_VCO_MULT & 63; /* Load the VCO multiplier */
+ r0 = r0 << 9; /* Shift it over */
+ r1 = CONFIG_CLKIN_HALF; /* Do we need to divide CLKIN by 2?*/
+ r0 = r1 | r0;
+ r1 = CONFIG_PLL_BYPASS; /* Bypass the PLL? */
+ r1 = r1 << 8; /* Shift it over */
+ r0 = r1 | r0; /* add them all together */
+
+ p0.h = hi(PLL_CTL);
+ p0.l = lo(PLL_CTL); /* Load the address */
+ cli r2; /* Disable interrupts */
+ ssync;
+ w[p0] = r0.l; /* Set the value */
+ idle; /* Wait for the PLL to stablize */
+ sti r2; /* Enable interrupts */
+
+check_again:
+ p0.h = hi(PLL_STAT);
+ p0.l = lo(PLL_STAT);
+ R0 = W[P0](Z);
+ CC = BITTST(R0,5);
+ if ! CC jump check_again;
+
+ /* Configure SCLK & CCLK Dividers */
+ r0 = (CONFIG_CCLK_ACT_DIV | CONFIG_SCLK_DIV);
+ p0.h = hi(PLL_DIV);
+ p0.l = lo(PLL_DIV);
+ w[p0] = r0.l;
+ ssync;
+#endif
+
+ /*
+ * Now, Initialize the SDRAM,
+ * start with the SDRAM Refresh Rate Control Register
+ */
+ p0.l = lo(EBIU_SDRRC);
+ p0.h = hi(EBIU_SDRRC);
+ r0 = mem_SDRRC;
+ w[p0] = r0.l;
+ ssync;
+
+ /*
+ * SDRAM Memory Bank Control Register - bank specific parameters
+ */
+ p0.l = (EBIU_SDBCTL & 0xFFFF);
+ p0.h = (EBIU_SDBCTL >> 16);
+ r0 = mem_SDBCTL;
+ w[p0] = r0.l;
+ ssync;
+
+ /*
+ * SDRAM Global Control Register - global programmable parameters
+ * Disable self-refresh
+ */
+ P2.H = hi(EBIU_SDGCTL);
+ P2.L = lo(EBIU_SDGCTL);
+ R0 = [P2];
+ BITCLR (R0, 24);
+
+ /*
+ * Check if SDRAM is already powered up, if it is, enable self-refresh
+ */
+ p0.h = hi(EBIU_SDSTAT);
+ p0.l = lo(EBIU_SDSTAT);
+ r2.l = w[p0];
+ cc = bittst(r2,3);
+ if !cc jump skip;
+ NOP;
+ BITSET (R0, 23);
+skip:
+ [P2] = R0;
+ SSYNC;
+
+ /* Write in the new value in the register */
+ R0.L = lo(mem_SDGCTL);
+ R0.H = hi(mem_SDGCTL);
+ [P2] = R0;
+ SSYNC;
+ nop;
+
+ (P5:0) = [SP++];
+ (R7:0) = [SP++];
+ RETS = [SP++];
+ ASTAT = [SP++];
+ RTS;
diff --git a/cpu/bf537/init_sdram_bootrom_initblock.S b/cpu/bf537/init_sdram_bootrom_initblock.S
new file mode 100644
index 0000000..f9adbb9
--- /dev/null
+++ b/cpu/bf537/init_sdram_bootrom_initblock.S
@@ -0,0 +1,199 @@
+#define ASSEMBLY
+
+#include <linux/config.h>
+#include <config.h>
+#include <asm/blackfin.h>
+#include <asm/mem_init.h>
+.global init_sdram;
+
+#if (BFIN_BOOT_MODE != BF537_UART_BOOT)
+#if (CONFIG_CCLK_DIV == 1)
+#define CONFIG_CCLK_ACT_DIV CCLK_DIV1
+#endif
+#if (CONFIG_CCLK_DIV == 2)
+#define CONFIG_CCLK_ACT_DIV CCLK_DIV2
+#endif
+#if (CONFIG_CCLK_DIV == 4)
+#define CONFIG_CCLK_ACT_DIV CCLK_DIV4
+#endif
+#if (CONFIG_CCLK_DIV == 8)
+#define CONFIG_CCLK_ACT_DIV CCLK_DIV8
+#endif
+#ifndef CONFIG_CCLK_ACT_DIV
+#define CONFIG_CCLK_ACT_DIV CONFIG_CCLK_DIV_not_defined_properly
+#endif
+#endif
+
+init_sdram:
+ [--SP] = ASTAT;
+ [--SP] = RETS;
+ [--SP] = (R7:0);
+ [--SP] = (P5:0);
+
+#if (BFIN_BOOT_MODE == BF537_SPI_MASTER_BOOT)
+ p0.h = hi(SIC_IWR);
+ p0.l = lo(SIC_IWR);
+ r0.l = 0x1;
+ w[p0] = r0.l;
+ SSYNC;
+
+ p0.h = hi(SPI_BAUD);
+ p0.l = lo(SPI_BAUD);
+ r0.l = CONFIG_SPI_BAUD_INITBLOCK;
+ w[p0] = r0.l;
+ SSYNC;
+#endif
+
+#if (BFIN_BOOT_MODE != BF537_UART_BOOT)
+
+#ifdef CONFIG_BF537
+ /* Enable PHY CLK buffer output */
+ p0.h = hi(VR_CTL);
+ p0.l = lo(VR_CTL);
+ r0.l = w[p0];
+ bitset(r0, 14);
+ w[p0] = r0.l;
+ ssync;
+#endif
+ /*
+ * PLL_LOCKCNT - how many SCLK Cycles to delay while PLL becomes stable
+ */
+ p0.h = hi(PLL_LOCKCNT);
+ p0.l = lo(PLL_LOCKCNT);
+ r0 = 0x300(Z);
+ w[p0] = r0.l;
+ ssync;
+
+ /*
+ * Put SDRAM in self-refresh, incase anything is running
+ */
+ P2.H = hi(EBIU_SDGCTL);
+ P2.L = lo(EBIU_SDGCTL);
+ R0 = [P2];
+ BITSET (R0, 24);
+ [P2] = R0;
+ SSYNC;
+
+ /*
+ * Set PLL_CTL with the value that we calculate in R0
+ * - [14:09] = MSEL[5:0] : CLKIN / VCO multiplication factors
+ * - [8] = BYPASS : BYPASS the PLL, run CLKIN into CCLK/SCLK
+ * - [7] = output delay (add 200ps of delay to mem signals)
+ * - [6] = input delay (add 200ps of input delay to mem signals)
+ * - [5] = PDWN : 1=All Clocks off
+ * - [3] = STOPCK : 1=Core Clock off
+ * - [1] = PLL_OFF : 1=Disable Power to PLL
+ * - [0] = DF : 1=Pass CLKIN/2 to PLL / 0=Pass CLKIN to PLL
+ * all other bits set to zero
+ */
+
+ r0 = CONFIG_VCO_MULT & 63; /* Load the VCO multiplier */
+ r0 = r0 << 9; /* Shift it over */
+ r1 = CONFIG_CLKIN_HALF; /* Do we need to divide CLKIN by 2?*/
+ r0 = r1 | r0;
+ r1 = CONFIG_PLL_BYPASS; /* Bypass the PLL? */
+ r1 = r1 << 8; /* Shift it over */
+ r0 = r1 | r0; /* add them all together */
+
+ p0.h = hi(PLL_CTL);
+ p0.l = lo(PLL_CTL); /* Load the address */
+ cli r2; /* Disable interrupts */
+ ssync;
+ w[p0] = r0.l; /* Set the value */
+ idle; /* Wait for the PLL to stablize */
+ sti r2; /* Enable interrupts */
+
+check_again:
+ p0.h = hi(PLL_STAT);
+ p0.l = lo(PLL_STAT);
+ R0 = W[P0](Z);
+ CC = BITTST(R0,5);
+ if ! CC jump check_again;
+
+ /* Configure SCLK & CCLK Dividers */
+ r0 = (CONFIG_CCLK_ACT_DIV | CONFIG_SCLK_DIV);
+ p0.h = hi(PLL_DIV);
+ p0.l = lo(PLL_DIV);
+ w[p0] = r0.l;
+ ssync;
+#endif
+
+ /*
+ * We now are running at speed, time to set the Async mem bank wait states
+ * This will speed up execution, since we are normally running from FLASH.
+ */
+
+ p2.h = (EBIU_AMBCTL1 >> 16);
+ p2.l = (EBIU_AMBCTL1 & 0xFFFF);
+ r0.h = (AMBCTL1VAL >> 16);
+ r0.l = (AMBCTL1VAL & 0xFFFF);
+ [p2] = r0;
+ ssync;
+
+ p2.h = (EBIU_AMBCTL0 >> 16);
+ p2.l = (EBIU_AMBCTL0 & 0xFFFF);
+ r0.h = (AMBCTL0VAL >> 16);
+ r0.l = (AMBCTL0VAL & 0xFFFF);
+ [p2] = r0;
+ ssync;
+
+ p2.h = (EBIU_AMGCTL >> 16);
+ p2.l = (EBIU_AMGCTL & 0xffff);
+ r0 = AMGCTLVAL;
+ w[p2] = r0;
+ ssync;
+
+ /*
+ * Now, Initialize the SDRAM,
+ * start with the SDRAM Refresh Rate Control Register
+ */
+ p0.l = lo(EBIU_SDRRC);
+ p0.h = hi(EBIU_SDRRC);
+ r0 = mem_SDRRC;
+ w[p0] = r0.l;
+ ssync;
+
+ /*
+ * SDRAM Memory Bank Control Register - bank specific parameters
+ */
+ p0.l = (EBIU_SDBCTL & 0xFFFF);
+ p0.h = (EBIU_SDBCTL >> 16);
+ r0 = mem_SDBCTL;
+ w[p0] = r0.l;
+ ssync;
+
+ /*
+ * SDRAM Global Control Register - global programmable parameters
+ * Disable self-refresh
+ */
+ P2.H = hi(EBIU_SDGCTL);
+ P2.L = lo(EBIU_SDGCTL);
+ R0 = [P2];
+ BITCLR (R0, 24);
+
+ /*
+ * Check if SDRAM is already powered up, if it is, enable self-refresh
+ */
+ p0.h = hi(EBIU_SDSTAT);
+ p0.l = lo(EBIU_SDSTAT);
+ r2.l = w[p0];
+ cc = bittst(r2,3);
+ if !cc jump skip;
+ NOP;
+ BITSET (R0, 23);
+skip:
+ [P2] = R0;
+ SSYNC;
+
+ /* Write in the new value in the register */
+ R0.L = lo(mem_SDGCTL);
+ R0.H = hi(mem_SDGCTL);
+ [P2] = R0;
+ SSYNC;
+ nop;
+
+ (P5:0) = [SP++];
+ (R7:0) = [SP++];
+ RETS = [SP++];
+ ASTAT = [SP++];
+ RTS;
diff --git a/cpu/bf537/interrupt.S b/cpu/bf537/interrupt.S
new file mode 100644
index 0000000..a8be34f
--- /dev/null
+++ b/cpu/bf537/interrupt.S
@@ -0,0 +1,246 @@
+/*
+ * U-boot - interrupt.S Processing of interrupts and exception handling
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ *
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * This file is based on interrupt.S
+ *
+ * Copyright (C) 2003 Metrowerks, Inc. <mwaddel@metrowerks.com>
+ * Copyright (C) 2002 Arcturus Networks Ltd. Ted Ma <mated@sympatico.ca>
+ * Copyright (C) 1998 D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca>,
+ * Kenneth Albanowski <kjahds@kjahds.com>,
+ * The Silver Hammer Group, Ltd.
+ *
+ * (c) 1995, Dionne & Associates
+ * (c) 1995, DKG Display Tech.
+ *
+ * This file is also based on exception.asm
+ * (C) Copyright 2001-2005 - Analog Devices, Inc. All rights reserved.
+ *
+ * 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
+ */
+
+#define ASSEMBLY
+#include <config.h>
+#include <asm/blackfin.h>
+#include <asm/hw_irq.h>
+#include <asm/entry.h>
+#include <asm/blackfin_defs.h>
+
+.global _blackfin_irq_panic;
+
+.text
+.align 2
+
+#ifndef CONFIG_KGDB
+.global _evt_emulation
+_evt_emulation:
+ SAVE_CONTEXT
+ r0 = IRQ_EMU;
+ r1 = seqstat;
+ sp += -12;
+ call _blackfin_irq_panic;
+ sp += 12;
+ rte;
+#endif
+
+.global _evt_nmi
+_evt_nmi:
+ SAVE_CONTEXT
+ r0 = IRQ_NMI;
+ r1 = RETN;
+ sp += -12;
+ call _blackfin_irq_panic;
+ sp += 12;
+
+_evt_nmi_exit:
+ rtn;
+
+.global _trap
+_trap:
+ SAVE_ALL_SYS
+ r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */
+ sp += -12;
+ call _trap_c
+ sp += 12;
+ RESTORE_ALL_SYS
+ rtx;
+
+.global _evt_rst
+_evt_rst:
+ SAVE_CONTEXT
+ r0 = IRQ_RST;
+ r1 = RETN;
+ sp += -12;
+ call _do_reset;
+ sp += 12;
+
+_evt_rst_exit:
+ rtn;
+
+irq_panic:
+ r0 = IRQ_EVX;
+ r1 = sp;
+ sp += -12;
+ call _blackfin_irq_panic;
+ sp += 12;
+
+.global _evt_ivhw
+_evt_ivhw:
+ SAVE_CONTEXT
+ RAISE 14;
+
+_evt_ivhw_exit:
+ rti;
+
+.global _evt_timer
+_evt_timer:
+ SAVE_CONTEXT
+ r0 = IRQ_CORETMR;
+ sp += -12;
+ /* Polling method used now. */
+ /* call timer_int; */
+ sp += 12;
+ RESTORE_CONTEXT
+ rti;
+ nop;
+
+.global _evt_evt7
+_evt_evt7:
+ SAVE_CONTEXT
+ r0 = 7;
+ sp += -12;
+ call _process_int;
+ sp += 12;
+
+evt_evt7_exit:
+ RESTORE_CONTEXT
+ rti;
+
+.global _evt_evt8
+_evt_evt8:
+ SAVE_CONTEXT
+ r0 = 8;
+ sp += -12;
+ call _process_int;
+ sp += 12;
+
+evt_evt8_exit:
+ RESTORE_CONTEXT
+ rti;
+
+.global _evt_evt9
+_evt_evt9:
+ SAVE_CONTEXT
+ r0 = 9;
+ sp += -12;
+ call _process_int;
+ sp += 12;
+
+evt_evt9_exit:
+ RESTORE_CONTEXT
+ rti;
+
+.global _evt_evt10
+_evt_evt10:
+ SAVE_CONTEXT
+ r0 = 10;
+ sp += -12;
+ call _process_int;
+ sp += 12;
+
+evt_evt10_exit:
+ RESTORE_CONTEXT
+ rti;
+
+.global _evt_evt11
+_evt_evt11:
+ SAVE_CONTEXT
+ r0 = 11;
+ sp += -12;
+ call _process_int;
+ sp += 12;
+
+evt_evt11_exit:
+ RESTORE_CONTEXT
+ rti;
+
+.global _evt_evt12
+_evt_evt12:
+ SAVE_CONTEXT
+ r0 = 12;
+ sp += -12;
+ call _process_int;
+ sp += 12;
+evt_evt12_exit:
+ RESTORE_CONTEXT
+ rti;
+
+.global _evt_evt13
+_evt_evt13:
+ SAVE_CONTEXT
+ r0 = 13;
+ sp += -12;
+ call _process_int;
+ sp += 12;
+
+evt_evt13_exit:
+ RESTORE_CONTEXT
+ rti;
+
+.global _evt_system_call
+_evt_system_call:
+ [--sp] = r0;
+ [--SP] = RETI;
+ r0 = [sp++];
+ r0 += 2;
+ [--sp] = r0;
+ RETI = [SP++];
+ r0 = [SP++];
+ SAVE_CONTEXT
+ sp += -12;
+ call _exception_handle;
+ sp += 12;
+ RESTORE_CONTEXT
+ RTI;
+
+evt_system_call_exit:
+ rti;
+
+.global _evt_soft_int1
+_evt_soft_int1:
+ [--sp] = r0;
+ [--SP] = RETI;
+ r0 = [sp++];
+ r0 += 2;
+ [--sp] = r0;
+ RETI = [SP++];
+ r0 = [SP++];
+ SAVE_CONTEXT
+ sp += -12;
+ call _exception_handle;
+ sp += 12;
+ RESTORE_CONTEXT
+ RTI;
+
+evt_soft_int1_exit:
+ rti;
diff --git a/cpu/bf537/interrupts.c b/cpu/bf537/interrupts.c
new file mode 100644
index 0000000..2ca76ec
--- /dev/null
+++ b/cpu/bf537/interrupts.c
@@ -0,0 +1,174 @@
+/*
+ * U-boot - interrupts.c Interrupt related routines
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ *
+ * This file is based on interrupts.c
+ * Copyright 1996 Roman Zippel
+ * Copyright 1999 D. Jeff Dionne <jeff@uclinux.org>
+ * Copyright 2000-2001 Lineo, Inc. D. Jefff Dionne <jeff@lineo.ca>
+ * Copyright 2002 Arcturus Networks Inc. MaTed <mated@sympatico.ca>
+ * Copyright 2003 Metrowerks/Motorola
+ * Copyright 2003 Bas Vermeulen <bas@buyways.nl>,
+ * BuyWays B.V. (www.buyways.nl)
+ *
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+
+ * 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 <asm/machdep.h>
+#include <asm/irq.h>
+#include <config.h>
+#include <asm/blackfin.h>
+#include "cpu.h"
+
+static ulong timestamp;
+static ulong last_time;
+static int int_flag;
+
+int irq_flags; /* needed by asm-blackfin/system.h */
+
+/* Functions just to satisfy the linker */
+
+/*
+ * This function is derived from PowerPC code (read timebase as long long).
+ * On BF533 it just returns the timer value.
+ */
+unsigned long long get_ticks(void)
+{
+ return get_timer(0);
+}
+
+/*
+ * This function is derived from PowerPC code (timebase clock frequency).
+ * On BF533 it returns the number of timer ticks per second.
+ */
+ulong get_tbclk (void)
+{
+ ulong tbclk;
+
+ tbclk = CFG_HZ;
+ return tbclk;
+}
+
+void enable_interrupts(void)
+{
+ restore_flags(int_flag);
+}
+
+int disable_interrupts(void)
+{
+ save_and_cli(int_flag);
+ return 1;
+}
+
+int interrupt_init(void)
+{
+ return (0);
+}
+
+void udelay(unsigned long usec)
+{
+ unsigned long delay, start, stop;
+ unsigned long cclk;
+ cclk = (CONFIG_CCLK_HZ);
+
+ while (usec > 1) {
+ /*
+ * how many clock ticks to delay?
+ * - request(in useconds) * clock_ticks(Hz) / useconds/second
+ */
+ if (usec < 1000) {
+ delay = (usec * (cclk / 244)) >> 12;
+ usec = 0;
+ } else {
+ delay = (1000 * (cclk / 244)) >> 12;
+ usec -= 1000;
+ }
+
+ asm volatile (" %0 = CYCLES;":"=r" (start));
+ do {
+ asm volatile (" %0 = CYCLES; ":"=r" (stop));
+ } while (stop - start < delay);
+ }
+
+ return;
+}
+
+void timer_init(void)
+{
+ *pTCNTL = 0x1;
+ *pTSCALE = 0x0;
+ *pTCOUNT = MAX_TIM_LOAD;
+ *pTPERIOD = MAX_TIM_LOAD;
+ *pTCNTL = 0x7;
+ asm("CSYNC;");
+
+ timestamp = 0;
+ last_time = 0;
+}
+
+/* Any network command or flash
+ * command is started get_timer shall
+ * be called before TCOUNT gets reset,
+ * to implement the accurate timeouts.
+ *
+ * How ever milliconds doesn't return
+ * the number that has been elapsed from
+ * the last reset.
+ *
+ * As get_timer is used in the u-boot
+ * only for timeouts this should be
+ * sufficient
+ */
+ulong get_timer(ulong base)
+{
+ ulong milisec;
+
+ /* Number of clocks elapsed */
+ ulong clocks = (MAX_TIM_LOAD - (*pTCOUNT));
+
+ /**
+ * Find if the TCOUNT is reset
+ * timestamp gives the number of times
+ * TCOUNT got reset
+ */
+ if (clocks < last_time)
+ timestamp++;
+ last_time = clocks;
+
+ /* Get the number of milliseconds */
+ milisec = clocks / (CONFIG_CCLK_HZ / 1000);
+
+ /**
+ * Find the number of millisonds
+ * that got elapsed before this TCOUNT cycle
+ */
+ milisec += timestamp * (MAX_TIM_LOAD / (CONFIG_CCLK_HZ / 1000));
+
+ return (milisec - base);
+}
+
+void reset_timer (void)
+{
+ timestamp = 0;
+}
diff --git a/cpu/bf537/ints.c b/cpu/bf537/ints.c
new file mode 100644
index 0000000..f476f14
--- /dev/null
+++ b/cpu/bf537/ints.c
@@ -0,0 +1,117 @@
+/*
+ * U-boot - ints.c Interrupt related routines
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ *
+ * This file is based on ints.c
+ *
+ * Apr18 2003, Changed by HuTao to support interrupt cascading for Blackfin
+ * drivers
+ *
+ * Copyright 1996 Roman Zippel
+ * Copyright 1999 D. Jeff Dionne <jeff@uclinux.org>
+ * Copyright 2000-2001 Lineo, Inc. D. Jefff Dionne <jeff@lineo.ca>
+ * Copyright 2002 Arcturus Networks Inc. MaTed <mated@sympatico.ca>
+ * Copyright 2003 Metrowerks/Motorola
+ *
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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 <linux/stddef.h>
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <asm/traps.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+#include <asm/machdep.h>
+#include <asm/setup.h>
+#include <asm/blackfin.h>
+#include "cpu.h"
+
+void blackfin_irq_panic(int reason, struct pt_regs *regs)
+{
+ printf("\n\nException: IRQ 0x%x entered\n", reason);
+ printf("code=[0x%x], ", (unsigned int)(regs->seqstat & 0x3f));
+ printf("stack frame=0x%x, ", (unsigned int)regs);
+ printf("bad PC=0x%04x\n", (unsigned int)regs->pc);
+ dump(regs);
+ printf("Unhandled IRQ or exceptions!\n");
+ printf("Please reset the board \n");
+}
+
+void blackfin_init_IRQ(void)
+{
+ *(unsigned volatile long *)(SIC_IMASK) = SIC_UNMASK_ALL;
+ cli();
+#ifndef CONFIG_KGDB
+ *(unsigned volatile long *)(EVT_EMULATION_ADDR) = 0x0;
+#endif
+ *(unsigned volatile long *)(EVT_NMI_ADDR) =
+ (unsigned volatile long)evt_nmi;
+ *(unsigned volatile long *)(EVT_EXCEPTION_ADDR) =
+ (unsigned volatile long)trap;
+ *(unsigned volatile long *)(EVT_HARDWARE_ERROR_ADDR) =
+ (unsigned volatile long)evt_ivhw;
+ *(unsigned volatile long *)(EVT_RESET_ADDR) =
+ (unsigned volatile long)evt_rst;
+ *(unsigned volatile long *)(EVT_TIMER_ADDR) =
+ (unsigned volatile long)evt_timer;
+ *(unsigned volatile long *)(EVT_IVG7_ADDR) =
+ (unsigned volatile long)evt_evt7;
+ *(unsigned volatile long *)(EVT_IVG8_ADDR) =
+ (unsigned volatile long)evt_evt8;
+ *(unsigned volatile long *)(EVT_IVG9_ADDR) =
+ (unsigned volatile long)evt_evt9;
+ *(unsigned volatile long *)(EVT_IVG10_ADDR) =
+ (unsigned volatile long)evt_evt10;
+ *(unsigned volatile long *)(EVT_IVG11_ADDR) =
+ (unsigned volatile long)evt_evt11;
+ *(unsigned volatile long *)(EVT_IVG12_ADDR) =
+ (unsigned volatile long)evt_evt12;
+ *(unsigned volatile long *)(EVT_IVG13_ADDR) =
+ (unsigned volatile long)evt_evt13;
+ *(unsigned volatile long *)(EVT_IVG14_ADDR) =
+ (unsigned volatile long)evt_system_call;
+ *(unsigned volatile long *)(EVT_IVG15_ADDR) =
+ (unsigned volatile long)evt_soft_int1;
+ *(volatile unsigned long *)ILAT = 0;
+ asm("csync;");
+ sti();
+ *(volatile unsigned long *)IMASK = 0xffbf;
+ asm("csync;");
+}
+
+void exception_handle(void)
+{
+#if defined (CONFIG_PANIC_HANG)
+ display_excp();
+#else
+ udelay(100000); /* allow messages to go out */
+ do_reset(NULL, 0, 0, NULL);
+#endif
+}
+
+void display_excp(void)
+{
+ printf("Exception!\n");
+}
diff --git a/cpu/bf537/serial.c b/cpu/bf537/serial.c
new file mode 100644
index 0000000..dd4f916
--- /dev/null
+++ b/cpu/bf537/serial.c
@@ -0,0 +1,194 @@
+/*
+ * U-boot - serial.c Serial driver for BF537
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ *
+ * This file is based on
+ * bf537_serial.c: Serial driver for BlackFin BF537 internal UART.
+ * Copyright (c) 2003 Bas Vermeulen <bas@buyways.nl>,
+ * BuyWays B.V. (www.buyways.nl)
+ *
+ * Based heavily on blkfinserial.c
+ * blkfinserial.c: Serial driver for BlackFin DSP internal USRTs.
+ * Copyright(c) 2003 Metrowerks <mwaddel@metrowerks.com>
+ * Copyright(c) 2001 Tony Z. Kou <tonyko@arcturusnetworks.com>
+ * Copyright(c) 2001-2002 Arcturus Networks Inc. <www.arcturusnetworks.com>
+ *
+ * Based on code from 68328 version serial driver imlpementation which was:
+ * Copyright (C) 1995 David S. Miller <davem@caip.rutgers.edu>
+ * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com>
+ * Copyright (C) 1998, 1999 D. Jeff Dionne <jeff@uclinux.org>
+ * Copyright (C) 1999 Vladimir Gurevich <vgurevic@cisco.com>
+ *
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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 <asm/irq.h>
+#include <asm/system.h>
+#include <asm/segment.h>
+#include <asm/bitops.h>
+#include <asm/delay.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include "serial.h"
+
+unsigned long pll_div_fact;
+
+void calc_baud(void)
+{
+ unsigned char i;
+ int temp;
+ u_long sclk = get_sclk();
+
+ for (i = 0; i < sizeof(baud_table) / sizeof(int); i++) {
+ temp = sclk / (baud_table[i] * 8);
+ if ((temp & 0x1) == 1) {
+ temp++;
+ }
+ temp = temp / 2;
+ hw_baud_table[i].dl_high = (temp >> 8) & 0xFF;
+ hw_baud_table[i].dl_low = (temp) & 0xFF;
+ }
+}
+
+void serial_setbrg(void)
+{
+ int i;
+ DECLARE_GLOBAL_DATA_PTR;
+
+ calc_baud();
+
+ for (i = 0; i < sizeof(baud_table) / sizeof(int); i++) {
+ if (gd->baudrate == baud_table[i])
+ break;
+ }
+
+ /* Enable UART */
+ *pUART_GCTL |= UART_GCTL_UCEN;
+ sync();
+
+ /* Set DLAB in LCR to Access DLL and DLH */
+ ACCESS_LATCH;
+ sync();
+
+ *pUART_DLL = hw_baud_table[i].dl_low;
+ sync();
+ *pUART_DLH = hw_baud_table[i].dl_high;
+ sync();
+
+ /* Clear DLAB in LCR to Access THR RBR IER */
+ ACCESS_PORT_IER;
+ sync();
+
+ /* Enable ERBFI and ELSI interrupts
+ * to poll SIC_ISR register*/
+ *pUART_IER = UART_IER_ELSI | UART_IER_ERBFI | UART_IER_ETBEI;
+ sync();
+
+ /* Set LCR to Word Lengh 8-bit word select */
+ *pUART_LCR = UART_LCR_WLS8;
+ sync();
+
+ return;
+}
+
+int serial_init(void)
+{
+ serial_setbrg();
+ return (0);
+}
+
+void serial_putc(const char c)
+{
+ if ((*pUART_LSR) & UART_LSR_TEMT) {
+ if (c == '\n')
+ serial_putc('\r');
+
+ local_put_char(c);
+ }
+
+ while (!((*pUART_LSR) & UART_LSR_TEMT))
+ SYNC_ALL;
+
+ return;
+}
+
+int serial_tstc(void)
+{
+ if (*pUART_LSR & UART_LSR_DR)
+ return 1;
+ else
+ return 0;
+}
+
+int serial_getc(void)
+{
+ unsigned short uart_lsr_val, uart_rbr_val;
+ unsigned long isr_val;
+ int ret;
+
+ /* Poll for RX Interrupt */
+ while (!((isr_val =
+ *(volatile unsigned long *)SIC_ISR) & IRQ_UART_RX_BIT)) ;
+ asm("csync;");
+
+ uart_lsr_val = *pUART_LSR; /* Clear status bit */
+ uart_rbr_val = *pUART_RBR; /* getc() */
+
+ if (isr_val & IRQ_UART_ERROR_BIT) {
+ ret = -1;
+ } else {
+ ret = uart_rbr_val & 0xff;
+ }
+
+ return ret;
+}
+
+void serial_puts(const char *s)
+{
+ while (*s) {
+ serial_putc(*s++);
+ }
+}
+
+static void local_put_char(char ch)
+{
+ int flags = 0;
+ unsigned long isr_val;
+
+ save_and_cli(flags);
+
+ /* Poll for TX Interruput */
+ while (!((isr_val = *pSIC_ISR) & IRQ_UART_TX_BIT)) ;
+ asm("csync;");
+
+ *pUART_THR = ch; /* putc() */
+
+ if (isr_val & IRQ_UART_ERROR_BIT) {
+ printf("?");
+ }
+
+ restore_flags(flags);
+
+ return;
+}
diff --git a/cpu/bf537/serial.h b/cpu/bf537/serial.h
new file mode 100644
index 0000000..c9ee3dc
--- /dev/null
+++ b/cpu/bf537/serial.h
@@ -0,0 +1,77 @@
+/*
+ * U-boot - bf537_serial.h Serial Driver defines
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ *
+ * This file is based on
+ * bf533_serial.h: Definitions for the BlackFin BF533 DSP serial driver.
+ * Copyright (C) 2003 Bas Vermeulen <bas@buyways.nl>
+ * BuyWays B.V. (www.buyways.nl)
+ *
+ * Based heavily on:
+ * blkfinserial.h: Definitions for the BlackFin DSP serial driver.
+ *
+ * Copyright (C) 2001 Tony Z. Kou tonyko@arcturusnetworks.com
+ * Copyright (C) 2001 Arcturus Networks Inc. <www.arcturusnetworks.com>
+ *
+ * Based on code from 68328serial.c which was:
+ * Copyright (C) 1995 David S. Miller <davem@caip.rutgers.edu>
+ * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com>
+ * Copyright (C) 1998, 1999 D. Jeff Dionne <jeff@uclinux.org>
+ * Copyright (C) 1999 Vladimir Gurevich <vgurevic@cisco.com>
+ *
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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
+ */
+
+#ifndef _Bf537_SERIAL_H
+#define _Bf537_SERIAL_H
+
+#include <linux/config.h>
+#include <asm/blackfin.h>
+
+#define SYNC_ALL __asm__ __volatile__ ("ssync;\n")
+#define ACCESS_LATCH *pUART_LCR |= UART_LCR_DLAB;
+#define ACCESS_PORT_IER *pUART_LCR &= (~UART_LCR_DLAB);
+
+void serial_setbrg(void);
+static void local_put_char(char ch);
+void calc_baud(void);
+void serial_setbrg(void);
+int serial_init(void);
+void serial_putc(const char c);
+int serial_tstc(void);
+int serial_getc(void);
+void serial_puts(const char *s);
+static void local_put_char(char ch);
+
+int baud_table[5] = { 9600, 19200, 38400, 57600, 115200 };
+
+struct {
+ unsigned char dl_high;
+ unsigned char dl_low;
+} hw_baud_table[5];
+
+#ifdef CONFIG_STAMP
+extern unsigned long pll_div_fact;
+#endif
+
+#endif
diff --git a/cpu/bf537/start.S b/cpu/bf537/start.S
new file mode 100644
index 0000000..264e9b6
--- /dev/null
+++ b/cpu/bf537/start.S
@@ -0,0 +1,579 @@
+/*
+ * U-boot - start.S Startup file of u-boot for BF537
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ *
+ * This file is based on head.S
+ * Copyright (c) 2003 Metrowerks/Motorola
+ * Copyright (C) 1998 D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca>,
+ * Kenneth Albanowski <kjahds@kjahds.com>,
+ * The Silver Hammer Group, Ltd.
+ * (c) 1995, Dionne & Associates
+ * (c) 1995, DKG Display Tech.
+ *
+ * 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
+ */
+
+/*
+ * Note: A change in this file subsequently requires a change in
+ * board/$(board_name)/config.mk for a valid u-boot.bin
+ */
+
+#define ASSEMBLY
+
+#include <linux/config.h>
+#include <config.h>
+#include <asm/blackfin.h>
+
+.global _stext;
+.global __bss_start;
+.global start;
+.global _start;
+.global _rambase;
+.global _ramstart;
+.global _ramend;
+.global _bf533_data_dest;
+.global _bf533_data_size;
+.global edata;
+.global _initialize;
+.global _exit;
+.global flashdataend;
+.global init_sdram;
+.global _icache_enable;
+.global _dcache_enable;
+#if defined(CONFIG_BF537)&&defined(CONFIG_POST)
+.global _memory_post_test;
+.global _post_flag;
+#endif
+
+#if (BFIN_BOOT_MODE == BF537_UART_BOOT)
+#if (CONFIG_CCLK_DIV == 1)
+#define CONFIG_CCLK_ACT_DIV CCLK_DIV1
+#endif
+#if (CONFIG_CCLK_DIV == 2)
+#define CONFIG_CCLK_ACT_DIV CCLK_DIV2
+#endif
+#if (CONFIG_CCLK_DIV == 4)
+#define CONFIG_CCLK_ACT_DIV CCLK_DIV4
+#endif
+#if (CONFIG_CCLK_DIV == 8)
+#define CONFIG_CCLK_ACT_DIV CCLK_DIV8
+#endif
+#ifndef CONFIG_CCLK_ACT_DIV
+#define CONFIG_CCLK_ACT_DIV CONFIG_CCLK_DIV_not_defined_properly
+#endif
+#endif
+
+.text
+_start:
+start:
+_stext:
+
+ R0 = 0x32;
+ SYSCFG = R0;
+ SSYNC;
+
+ /* As per HW reference manual DAG registers,
+ * DATA and Address resgister shall be zero'd
+ * in initialization, after a reset state
+ */
+ r1 = 0; /* Data registers zero'd */
+ r2 = 0;
+ r3 = 0;
+ r4 = 0;
+ r5 = 0;
+ r6 = 0;
+ r7 = 0;
+
+ p0 = 0; /* Address registers zero'd */
+ p1 = 0;
+ p2 = 0;
+ p3 = 0;
+ p4 = 0;
+ p5 = 0;
+
+ i0 = 0; /* DAG Registers zero'd */
+ i1 = 0;
+ i2 = 0;
+ i3 = 0;
+ m0 = 0;
+ m1 = 0;
+ m3 = 0;
+ m3 = 0;
+ l0 = 0;
+ l1 = 0;
+ l2 = 0;
+ l3 = 0;
+ b0 = 0;
+ b1 = 0;
+ b2 = 0;
+ b3 = 0;
+
+ /* Set loop counters to zero, to make sure that
+ * hw loops are disabled.
+ */
+ r0 = 0;
+ lc0 = r0;
+ lc1 = r0;
+
+ SSYNC;
+
+ /* Check soft reset status */
+ p0.h = SWRST >> 16;
+ p0.l = SWRST & 0xFFFF;
+ r0.l = w[p0];
+
+ cc = bittst(r0, 15);
+ if !cc jump no_soft_reset;
+
+ /* Clear Soft reset */
+ r0 = 0x0000;
+ w[p0] = r0;
+ ssync;
+
+no_soft_reset:
+ nop;
+
+ /* Clear EVT registers */
+ p0.h = (EVT_EMULATION_ADDR >> 16);
+ p0.l = (EVT_EMULATION_ADDR & 0xFFFF);
+ p0 += 8;
+ p1 = 14;
+ r1 = 0;
+ LSETUP(4,4) lc0 = p1;
+ [ p0 ++ ] = r1;
+
+#if (BFIN_BOOT_MODE != BF537_SPI_MASTER_BOOT)
+ p0.h = hi(SIC_IWR);
+ p0.l = lo(SIC_IWR);
+ r0.l = 0x1;
+ w[p0] = r0.l;
+ SSYNC;
+#endif
+
+#if (BFIN_BOOT_MODE == BF537_UART_BOOT)
+
+ p0.h = hi(SIC_IWR);
+ p0.l = lo(SIC_IWR);
+ r0.l = 0x1;
+ w[p0] = r0.l;
+ SSYNC;
+
+ /*
+ * PLL_LOCKCNT - how many SCLK Cycles to delay while PLL becomes stable
+ */
+ p0.h = hi(PLL_LOCKCNT);
+ p0.l = lo(PLL_LOCKCNT);
+ r0 = 0x300(Z);
+ w[p0] = r0.l;
+ ssync;
+
+ /*
+ * Put SDRAM in self-refresh, incase anything is running
+ */
+ P2.H = hi(EBIU_SDGCTL);
+ P2.L = lo(EBIU_SDGCTL);
+ R0 = [P2];
+ BITSET (R0, 24);
+ [P2] = R0;
+ SSYNC;
+
+ /*
+ * Set PLL_CTL with the value that we calculate in R0
+ * - [14:09] = MSEL[5:0] : CLKIN / VCO multiplication factors
+ * - [8] = BYPASS : BYPASS the PLL, run CLKIN into CCLK/SCLK
+ * - [7] = output delay (add 200ps of delay to mem signals)
+ * - [6] = input delay (add 200ps of input delay to mem signals)
+ * - [5] = PDWN : 1=All Clocks off
+ * - [3] = STOPCK : 1=Core Clock off
+ * - [1] = PLL_OFF : 1=Disable Power to PLL
+ * - [0] = DF : 1=Pass CLKIN/2 to PLL / 0=Pass CLKIN to PLL
+ * all other bits set to zero
+ */
+
+ r0 = CONFIG_VCO_MULT & 63; /* Load the VCO multiplier */
+ r0 = r0 << 9; /* Shift it over, */
+ r1 = CONFIG_CLKIN_HALF; /* Do we need to divide CLKIN by 2?*/
+ r0 = r1 | r0;
+ r1 = CONFIG_PLL_BYPASS; /* Bypass the PLL? */
+ r1 = r1 << 8; /* Shift it over */
+ r0 = r1 | r0; /* add them all together */
+
+ p0.h = hi(PLL_CTL);
+ p0.l = lo(PLL_CTL); /* Load the address */
+ cli r2; /* Disable interrupts */
+ ssync;
+ w[p0] = r0.l; /* Set the value */
+ idle; /* Wait for the PLL to stablize */
+ sti r2; /* Enable interrupts */
+
+check_again:
+ p0.h = hi(PLL_STAT);
+ p0.l = lo(PLL_STAT);
+ R0 = W[P0](Z);
+ CC = BITTST(R0,5);
+ if ! CC jump check_again;
+
+ /* Configure SCLK & CCLK Dividers */
+ r0 = (CONFIG_CCLK_ACT_DIV | CONFIG_SCLK_DIV);
+ p0.h = hi(PLL_DIV);
+ p0.l = lo(PLL_DIV);
+ w[p0] = r0.l;
+ ssync;
+#endif
+
+ /*
+ * We now are running at speed, time to set the Async mem bank wait states
+ * This will speed up execution, since we are normally running from FLASH.
+ * we need to read MAC address from FLASH
+ */
+ p2.h = (EBIU_AMBCTL1 >> 16);
+ p2.l = (EBIU_AMBCTL1 & 0xFFFF);
+ r0.h = (AMBCTL1VAL >> 16);
+ r0.l = (AMBCTL1VAL & 0xFFFF);
+ [p2] = r0;
+ ssync;
+
+ p2.h = (EBIU_AMBCTL0 >> 16);
+ p2.l = (EBIU_AMBCTL0 & 0xFFFF);
+ r0.h = (AMBCTL0VAL >> 16);
+ r0.l = (AMBCTL0VAL & 0xFFFF);
+ [p2] = r0;
+ ssync;
+
+ p2.h = (EBIU_AMGCTL >> 16);
+ p2.l = (EBIU_AMGCTL & 0xffff);
+ r0 = AMGCTLVAL;
+ w[p2] = r0;
+ ssync;
+
+#if ((BFIN_BOOT_MODE != BF537_SPI_MASTER_BOOT) && (BFIN_BOOT_MODE != BF537_UART_BOOT))
+ sp.l = (0xffb01000 & 0xFFFF);
+ sp.h = (0xffb01000 >> 16);
+
+ call init_sdram;
+#endif
+
+
+#if defined(CONFIG_BF537)&&defined(CONFIG_POST)
+ /* DMA POST code to Hi of L1 SRAM */
+postcopy:
+ /* P1 Points to the beginning of SYSTEM MMR Space */
+ P1.H = hi(SYSMMR_BASE);
+ P1.L = lo(SYSMMR_BASE);
+
+ R0.H = _text_l1;
+ R0.L = _text_l1;
+ R1.H = _etext_l1;
+ R1.L = _etext_l1;
+ R2 = R1 - R0; /* Count */
+ R0.H = _etext;
+ R0.L = _etext;
+ R1.H = (CFG_MONITOR_BASE >> 16);
+ R1.L = (CFG_MONITOR_BASE & 0xFFFF);
+ R0 = R0 - R1;
+ R1.H = (CFG_FLASH_BASE >> 16);
+ R1.L = (CFG_FLASH_BASE & 0xFFFF);
+ R0 = R0 + R1; /* Source Address */
+ R1.H = hi(L1_ISRAM); /* Destination Address (high) */
+ R1.L = lo(L1_ISRAM); /* Destination Address (low) */
+ R3.L = DMAEN; /* Source DMAConfig Value (8-bit words) */
+ /* Destination DMAConfig Value (8-bit words) */
+ R4.L = (DI_EN | WNR | DMAEN);
+
+ R6 = 0x1 (Z);
+ W[P1+OFFSET_(MDMA_S0_X_MODIFY)] = R6; /* Source Modify = 1 */
+ W[P1+OFFSET_(MDMA_D0_X_MODIFY)] = R6; /* Destination Modify = 1 */
+
+ [P1+OFFSET_(MDMA_S0_START_ADDR)] = R0; /* Set Source Base Address */
+ W[P1+OFFSET_(MDMA_S0_X_COUNT)] = R2; /* Set Source Count */
+ /* Set Source DMAConfig = DMA Enable,
+ Memory Read, 8-Bit Transfers, 1-D DMA, Flow - Stop */
+ W[P1+OFFSET_(MDMA_S0_CONFIG)] = R3;
+
+ [P1+OFFSET_(MDMA_D0_START_ADDR)] = R1; /* Set Destination Base Address */
+ W[P1+OFFSET_(MDMA_D0_X_COUNT)] = R2; /* Set Destination Count */
+ /* Set Destination DMAConfig = DMA Enable,
+ Memory Write, 8-Bit Transfers, 1-D DMA, Flow - Stop, IOC */
+ W[P1+OFFSET_(MDMA_D0_CONFIG)] = R4;
+
+POST_DMA_DONE:
+ p0.h = hi(MDMA_D0_IRQ_STATUS);
+ p0.l = lo(MDMA_D0_IRQ_STATUS);
+ R0 = W[P0](Z);
+ CC = BITTST(R0, 0);
+ if ! CC jump POST_DMA_DONE
+
+ R0 = 0x1;
+ W[P1+OFFSET_(MDMA_D0_IRQ_STATUS)] = R0; /* Write 1 to clear DMA interrupt */
+
+ /* DMA POST data to Hi of L1 SRAM */
+ R0.H = _rodata_l1;
+ R0.L = _rodata_l1;
+ R1.H = _erodata_l1;
+ R1.L = _erodata_l1;
+ R2 = R1 - R0; /* Count */
+ R0.H = _erodata;
+ R0.L = _erodata;
+ R1.H = (CFG_MONITOR_BASE >> 16);
+ R1.L = (CFG_MONITOR_BASE & 0xFFFF);
+ R0 = R0 - R1;
+ R1.H = (CFG_FLASH_BASE >> 16);
+ R1.L = (CFG_FLASH_BASE & 0xFFFF);
+ R0 = R0 + R1; /* Source Address */
+ R1.H = hi(DATA_BANKB_SRAM); /* Destination Address (high) */
+ R1.L = lo(DATA_BANKB_SRAM); /* Destination Address (low) */
+ R3.L = DMAEN; /* Source DMAConfig Value (8-bit words) */
+ R4.L = (DI_EN | WNR | DMAEN); /* Destination DMAConfig Value (8-bit words) */
+
+ R6 = 0x1 (Z);
+ W[P1+OFFSET_(MDMA_S0_X_MODIFY)] = R6; /* Source Modify = 1 */
+ W[P1+OFFSET_(MDMA_D0_X_MODIFY)] = R6; /* Destination Modify = 1 */
+
+ [P1+OFFSET_(MDMA_S0_START_ADDR)] = R0; /* Set Source Base Address */
+ W[P1+OFFSET_(MDMA_S0_X_COUNT)] = R2; /* Set Source Count */
+ /* Set Source DMAConfig = DMA Enable,
+ Memory Read, 8-Bit Transfers, 1-D DMA, Flow - Stop */
+ W[P1+OFFSET_(MDMA_S0_CONFIG)] = R3;
+
+ [P1+OFFSET_(MDMA_D0_START_ADDR)] = R1; /* Set Destination Base Address */
+ W[P1+OFFSET_(MDMA_D0_X_COUNT)] = R2; /* Set Destination Count */
+ /* Set Destination DMAConfig = DMA Enable,
+ Memory Write, 8-Bit Transfers, 1-D DMA, Flow - Stop, IOC */
+ W[P1+OFFSET_(MDMA_D0_CONFIG)] = R4;
+
+POST_DATA_DMA_DONE:
+ p0.h = hi(MDMA_D0_IRQ_STATUS);
+ p0.l = lo(MDMA_D0_IRQ_STATUS);
+ R0 = W[P0](Z);
+ CC = BITTST(R0, 0);
+ if ! CC jump POST_DATA_DMA_DONE
+
+ R0 = 0x1;
+ W[P1+OFFSET_(MDMA_D0_IRQ_STATUS)] = R0; /* Write 1 to clear DMA interrupt */
+
+ p0.l = _memory_post_test;
+ p0.h = _memory_post_test;
+ r0 = 0x0;
+ call (p0);
+ r7 = r0; /* save return value */
+
+ call init_sdram;
+#endif
+
+ /* relocate into to RAM */
+ call get_pc;
+offset:
+ r2.l = offset;
+ r2.h = offset;
+ r3.l = start;
+ r3.h = start;
+ r1 = r2 - r3;
+
+ r0 = r0 - r1;
+ p1 = r0;
+
+ p2.l = (CFG_MONITOR_BASE & 0xffff);
+ p2.h = (CFG_MONITOR_BASE >> 16);
+
+ p3 = 0x04;
+ p4.l = ((CFG_MONITOR_BASE + CFG_MONITOR_LEN) & 0xffff);
+ p4.h = ((CFG_MONITOR_BASE + CFG_MONITOR_LEN) >> 16);
+loop1:
+ r1 = [p1 ++ p3];
+ [p2 ++ p3] = r1;
+ cc=p2==p4;
+ if !cc jump loop1;
+ /*
+ * configure STACK
+ */
+ r0.h = (CONFIG_STACKBASE >> 16);
+ r0.l = (CONFIG_STACKBASE & 0xFFFF);
+ sp = r0;
+ fp = sp;
+
+ /*
+ * This next section keeps the processor in supervisor mode
+ * during kernel boot. Switches to user mode at end of boot.
+ * See page 3-9 of Hardware Reference manual for documentation.
+ */
+
+ /* To keep ourselves in the supervisor mode */
+ p0.l = (EVT_IVG15_ADDR & 0xFFFF);
+ p0.h = (EVT_IVG15_ADDR >> 16);
+
+ p1.l = _real_start;
+ p1.h = _real_start;
+ [p0] = p1;
+
+ p0.l = (IMASK & 0xFFFF);
+ p0.h = (IMASK >> 16);
+ r0.l = LO(IVG15_POS);
+ r0.h = HI(IVG15_POS);
+ [p0] = r0;
+ raise 15;
+ p0.l = WAIT_HERE;
+ p0.h = WAIT_HERE;
+ reti = p0;
+ rti;
+
+WAIT_HERE:
+ jump WAIT_HERE;
+
+.global _real_start;
+_real_start:
+ [ -- sp ] = reti;
+
+#ifdef CONFIG_BF537
+/* Initialise General-Purpose I/O Modules on BF537
+ * Rev 0.0 Anomaly 05000212 - PORTx_FER,
+ * PORT_MUX Registers Do Not accept "writes" correctly
+ */
+ p0.h = hi(PORTF_FER);
+ p0.l = lo(PORTF_FER);
+ R0.L = W[P0]; /* Read */
+ nop;
+ nop;
+ nop;
+ ssync;
+ R0 = 0x000F(Z);
+ W[P0] = R0.L; /* Write */
+ nop;
+ nop;
+ nop;
+ ssync;
+ W[P0] = R0.L; /* Enable peripheral function of PORTF for UART0 and UART1 */
+ nop;
+ nop;
+ nop;
+ ssync;
+
+ p0.h = hi(PORTH_FER);
+ p0.l = lo(PORTH_FER);
+ R0.L = W[P0]; /* Read */
+ nop;
+ nop;
+ nop;
+ ssync;
+ R0 = 0xFFFF(Z);
+ W[P0] = R0.L; /* Write */
+ nop;
+ nop;
+ nop;
+ ssync;
+ W[P0] = R0.L; /* Enable peripheral function of PORTH for MAC */
+ nop;
+ nop;
+ nop;
+ ssync;
+
+#endif
+
+ /* DMA reset code to Hi of L1 SRAM */
+copy:
+ P1.H = hi(SYSMMR_BASE); /* P1 Points to the beginning of SYSTEM MMR Space */
+ P1.L = lo(SYSMMR_BASE);
+
+ R0.H = reset_start; /* Source Address (high) */
+ R0.L = reset_start; /* Source Address (low) */
+ R1.H = reset_end;
+ R1.L = reset_end;
+ R2 = R1 - R0; /* Count */
+ R1.H = hi(L1_ISRAM); /* Destination Address (high) */
+ R1.L = lo(L1_ISRAM); /* Destination Address (low) */
+ R3.L = DMAEN; /* Source DMAConfig Value (8-bit words) */
+ R4.L = (DI_EN | WNR | DMAEN); /* Destination DMAConfig Value (8-bit words) */
+
+DMA:
+ R6 = 0x1 (Z);
+ W[P1+OFFSET_(MDMA_S0_X_MODIFY)] = R6; /* Source Modify = 1 */
+ W[P1+OFFSET_(MDMA_D0_X_MODIFY)] = R6; /* Destination Modify = 1 */
+
+ [P1+OFFSET_(MDMA_S0_START_ADDR)] = R0; /* Set Source Base Address */
+ W[P1+OFFSET_(MDMA_S0_X_COUNT)] = R2; /* Set Source Count */
+ /* Set Source DMAConfig = DMA Enable,
+ Memory Read, 8-Bit Transfers, 1-D DMA, Flow - Stop */
+ W[P1+OFFSET_(MDMA_S0_CONFIG)] = R3;
+
+ [P1+OFFSET_(MDMA_D0_START_ADDR)] = R1; /* Set Destination Base Address */
+ W[P1+OFFSET_(MDMA_D0_X_COUNT)] = R2; /* Set Destination Count */
+ /* Set Destination DMAConfig = DMA Enable,
+ Memory Write, 8-Bit Transfers, 1-D DMA, Flow - Stop, IOC */
+ W[P1+OFFSET_(MDMA_D0_CONFIG)] = R4;
+
+WAIT_DMA_DONE:
+ p0.h = hi(MDMA_D0_IRQ_STATUS);
+ p0.l = lo(MDMA_D0_IRQ_STATUS);
+ R0 = W[P0](Z);
+ CC = BITTST(R0, 0);
+ if ! CC jump WAIT_DMA_DONE
+
+ R0 = 0x1;
+ W[P1+OFFSET_(MDMA_D0_IRQ_STATUS)] = R0; /* Write 1 to clear DMA interrupt */
+
+ /* Initialize BSS Section with 0 s */
+ p1.l = __bss_start;
+ p1.h = __bss_start;
+ p2.l = _end;
+ p2.h = _end;
+ r1 = p1;
+ r2 = p2;
+ r3 = r2 - r1;
+ r3 = r3 >> 2;
+ p3 = r3;
+ lsetup (_clear_bss, _clear_bss_end ) lc1 = p3;
+ CC = p2<=p1;
+ if CC jump _clear_bss_skip;
+ r0 = 0;
+_clear_bss:
+_clear_bss_end:
+ [p1++] = r0;
+_clear_bss_skip:
+
+#if defined(CONFIG_BF537)&&defined(CONFIG_POST)
+ p0.l = _post_flag;
+ p0.h = _post_flag;
+ r0 = r7;
+ [p0] = r0;
+#endif
+
+ p0.l = _start1;
+ p0.h = _start1;
+ jump (p0);
+
+reset_start:
+ p0.h = WDOG_CNT >> 16;
+ p0.l = WDOG_CNT & 0xffff;
+ r0 = 0x0010;
+ w[p0] = r0;
+ p0.h = WDOG_CTL >> 16;
+ p0.l = WDOG_CTL & 0xffff;
+ r0 = 0x0000;
+ w[p0] = r0;
+reset_wait:
+ jump reset_wait;
+
+reset_end:
+ nop;
+
+_exit:
+ jump.s _exit;
+get_pc:
+ r0 = rets;
+ rts;
diff --git a/cpu/bf537/start1.S b/cpu/bf537/start1.S
new file mode 100644
index 0000000..72cfafb
--- /dev/null
+++ b/cpu/bf537/start1.S
@@ -0,0 +1,38 @@
+/*
+ * U-boot - start1.S Code running out of RAM after relocation
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ *
+ * 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
+ */
+
+#define ASSEMBLY
+#include <linux/config.h>
+#include <config.h>
+#include <asm/blackfin.h>
+
+.global start1;
+.global _start1;
+
+.text
+_start1:
+start1:
+ sp += -12;
+ call _board_init_f;
+ sp += 12;
diff --git a/cpu/bf537/traps.c b/cpu/bf537/traps.c
new file mode 100644
index 0000000..994ece8
--- /dev/null
+++ b/cpu/bf537/traps.c
@@ -0,0 +1,241 @@
+/*
+ * U-boot - traps.c Routines related to interrupts and exceptions
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ *
+ * This file is based on
+ * No original Copyright holder listed,
+ * Probabily original (C) Roman Zippel (assigned DJD, 1999)
+ *
+ * Copyright 2003 Metrowerks - for Blackfin
+ * Copyright 2000-2001 Lineo, Inc. D. Jeff Dionne <jeff@lineo.ca>
+ * Copyright 1999-2000 D. Jeff Dionne, <jeff@uclinux.org>
+ *
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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 <linux/types.h>
+#include <asm/errno.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/traps.h>
+#include <asm/page.h>
+#include <asm/machdep.h>
+#include "cpu.h"
+#include <asm/arch/anomaly.h>
+#include <asm/cplb.h>
+#include <asm/io.h>
+
+void init_IRQ(void)
+{
+ blackfin_init_IRQ();
+ return;
+}
+
+void process_int(unsigned long vec, struct pt_regs *fp)
+{
+ printf("interrupt\n");
+ return;
+}
+
+extern unsigned int icplb_table[page_descriptor_table_size][2];
+extern unsigned int dcplb_table[page_descriptor_table_size][2];
+
+unsigned long last_cplb_fault_retx;
+
+static unsigned int cplb_sizes[4] =
+ { 1024, 4 * 1024, 1024 * 1024, 4 * 1024 * 1024 };
+
+void trap_c(struct pt_regs *regs)
+{
+ unsigned int addr;
+ unsigned long trapnr = (regs->seqstat) & SEQSTAT_EXCAUSE;
+ unsigned int i, j, size, *I0, *I1;
+ unsigned short data = 0;
+
+ switch (trapnr) {
+ /* 0x26 - Data CPLB Miss */
+ case VEC_CPLB_M:
+
+#ifdef ANOMALY_05000261
+ /*
+ * Work around an anomaly: if we see a new DCPLB fault,
+ * return without doing anything. Then,
+ * if we get the same fault again, handle it.
+ */
+ addr = last_cplb_fault_retx;
+ last_cplb_fault_retx = regs->retx;
+ printf("this time, curr = 0x%08x last = 0x%08x\n",
+ addr, last_cplb_fault_retx);
+ if (addr != last_cplb_fault_retx)
+ goto trap_c_return;
+#endif
+ data = 1;
+
+ case VEC_CPLB_I_M:
+
+ if (data) {
+ addr = *pDCPLB_FAULT_ADDR;
+ } else {
+ addr = *pICPLB_FAULT_ADDR;
+ }
+ for (i = 0; i < page_descriptor_table_size; i++) {
+ if (data) {
+ size = cplb_sizes[dcplb_table[i][1] >> 16];
+ j = dcplb_table[i][0];
+ } else {
+ size = cplb_sizes[icplb_table[i][1] >> 16];
+ j = icplb_table[i][0];
+ }
+ if ((j <= addr) && ((j + size) > addr)) {
+ debug("found %i 0x%08x\n", i, j);
+ break;
+ }
+ }
+ if (i == page_descriptor_table_size) {
+ printf("something is really wrong\n");
+ do_reset(NULL, 0, 0, NULL);
+ }
+
+ /* Turn the cache off */
+ if (data) {
+ sync();
+ asm(" .align 8; ");
+ *(unsigned int *)DMEM_CONTROL &=
+ ~(ACACHE_BCACHE | ENDCPLB | PORT_PREF0);
+ sync();
+ } else {
+ sync();
+ asm(" .align 8; ");
+ *(unsigned int *)IMEM_CONTROL &= ~(IMC | ENICPLB);
+ sync();
+ }
+
+ if (data) {
+ I0 = (unsigned int *)DCPLB_ADDR0;
+ I1 = (unsigned int *)DCPLB_DATA0;
+ } else {
+ I0 = (unsigned int *)ICPLB_ADDR0;
+ I1 = (unsigned int *)ICPLB_DATA0;
+ }
+
+ j = 0;
+ while (*I1 & CPLB_LOCK) {
+ debug("skipping %i %08p - %08x\n", j, I1, *I1);
+ *I0++;
+ *I1++;
+ j++;
+ }
+
+ debug("remove %i 0x%08x 0x%08x\n", j, *I0, *I1);
+
+ for (; j < 15; j++) {
+ debug("replace %i 0x%08x 0x%08x\n", j, I0, I0 + 1);
+ *I0++ = *(I0 + 1);
+ *I1++ = *(I1 + 1);
+ }
+
+ if (data) {
+ *I0 = dcplb_table[i][0];
+ *I1 = dcplb_table[i][1];
+ I0 = (unsigned int *)DCPLB_ADDR0;
+ I1 = (unsigned int *)DCPLB_DATA0;
+ } else {
+ *I0 = icplb_table[i][0];
+ *I1 = icplb_table[i][1];
+ I0 = (unsigned int *)ICPLB_ADDR0;
+ I1 = (unsigned int *)ICPLB_DATA0;
+ }
+
+ for (j = 0; j < 16; j++) {
+ debug("%i 0x%08x 0x%08x\n", j, *I0++, *I1++);
+ }
+
+ /* Turn the cache back on */
+ if (data) {
+ j = *(unsigned int *)DMEM_CONTROL;
+ sync();
+ asm(" .align 8; ");
+ *(unsigned int *)DMEM_CONTROL =
+ ACACHE_BCACHE | ENDCPLB | PORT_PREF0 | j;
+ sync();
+ } else {
+ sync();
+ asm(" .align 8; ");
+ *(unsigned int *)IMEM_CONTROL = IMC | ENICPLB;
+ sync();
+ }
+
+ break;
+ default:
+ /* All traps come here */
+ printf("code=[0x%x], ", (unsigned int)(regs->seqstat & 0x3f));
+ printf("stack frame=0x%x, ", (unsigned int)regs);
+ printf("bad PC=0x%04x\n", (unsigned int)regs->pc);
+ dump(regs);
+ printf("\n\n");
+
+ printf("Unhandled IRQ or exceptions!\n");
+ printf("Please reset the board \n");
+ do_reset(NULL, 0, 0, NULL);
+ }
+
+trap_c_return:
+ return;
+
+}
+
+void dump(struct pt_regs *fp)
+{
+ debug("RETE: %08lx RETN: %08lx RETX: %08lx RETS: %08lx\n",
+ fp->rete, fp->retn, fp->retx, fp->rets);
+ debug("IPEND: %04lx SYSCFG: %04lx\n", fp->ipend, fp->syscfg);
+ debug("SEQSTAT: %08lx SP: %08lx\n", (long)fp->seqstat, (long)fp);
+ debug("R0: %08lx R1: %08lx R2: %08lx R3: %08lx\n",
+ fp->r0, fp->r1, fp->r2, fp->r3);
+ debug("R4: %08lx R5: %08lx R6: %08lx R7: %08lx\n",
+ fp->r4, fp->r5, fp->r6, fp->r7);
+ debug("P0: %08lx P1: %08lx P2: %08lx P3: %08lx\n",
+ fp->p0, fp->p1, fp->p2, fp->p3);
+ debug("P4: %08lx P5: %08lx FP: %08lx\n",
+ fp->p4, fp->p5, fp->fp);
+ debug("A0.w: %08lx A0.x: %08lx A1.w: %08lx A1.x: %08lx\n",
+ fp->a0w, fp->a0x, fp->a1w, fp->a1x);
+
+ debug("LB0: %08lx LT0: %08lx LC0: %08lx\n",
+ fp->lb0, fp->lt0, fp->lc0);
+ debug("LB1: %08lx LT1: %08lx LC1: %08lx\n",
+ fp->lb1, fp->lt1, fp->lc1);
+ debug("B0: %08lx L0: %08lx M0: %08lx I0: %08lx\n",
+ fp->b0, fp->l0, fp->m0, fp->i0);
+ debug("B1: %08lx L1: %08lx M1: %08lx I1: %08lx\n",
+ fp->b1, fp->l1, fp->m1, fp->i1);
+ debug("B2: %08lx L2: %08lx M2: %08lx I2: %08lx\n",
+ fp->b2, fp->l2, fp->m2, fp->i2);
+ debug("B3: %08lx L3: %08lx M3: %08lx I3: %08lx\n",
+ fp->b3, fp->l3, fp->m3, fp->i3);
+
+ debug("DCPLB_FAULT_ADDR=%p\n", *pDCPLB_FAULT_ADDR);
+ debug("ICPLB_FAULT_ADDR=%p\n", *pICPLB_FAULT_ADDR);
+
+}
diff --git a/cpu/bf537/video.c b/cpu/bf537/video.c
new file mode 100644
index 0000000..3ff0151
--- /dev/null
+++ b/cpu/bf537/video.c
@@ -0,0 +1,194 @@
+/*
+ * (C) Copyright 2000
+ * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
+ * (C) Copyright 2002
+ * Wolfgang Denk, wd@denx.de
+ * (C) Copyright 2006
+ * Aubrey Li, aubrey.li@analog.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 <stdarg.h>
+#include <common.h>
+#include <config.h>
+#include <asm/blackfin.h>
+#include <i2c.h>
+#include <linux/types.h>
+#include <devices.h>
+
+#ifdef CONFIG_VIDEO
+#define NTSC_FRAME_ADDR 0x06000000
+#include "video.h"
+
+/* NTSC OUTPUT SIZE 720 * 240 */
+#define VERTICAL 2
+#define HORIZONTAL 4
+
+int is_vblank_line(const int line)
+{
+ /*
+ * This array contains a single bit for each line in
+ * an NTSC frame.
+ */
+ if ((line <= 18) || (line >= 264 && line <= 281) || (line == 528))
+ return true;
+
+ return false;
+}
+
+int NTSC_framebuffer_init(char *base_address)
+{
+ const int NTSC_frames = 1;
+ const int NTSC_lines = 525;
+ char *dest = base_address;
+ int frame_num, line_num;
+
+ for (frame_num = 0; frame_num < NTSC_frames; ++frame_num) {
+ for (line_num = 1; line_num <= NTSC_lines; ++line_num) {
+ unsigned int code;
+ int offset = 0;
+ int i;
+
+ if (is_vblank_line(line_num))
+ offset++;
+
+ if (line_num > 266 || line_num < 3)
+ offset += 2;
+
+ /* Output EAV code */
+ code = SystemCodeMap[offset].EAV;
+ write_dest_byte((char)(code >> 24) & 0xff);
+ write_dest_byte((char)(code >> 16) & 0xff);
+ write_dest_byte((char)(code >> 8) & 0xff);
+ write_dest_byte((char)(code) & 0xff);
+
+ /* Output horizontal blanking */
+ for (i = 0; i < 67 * 2; ++i) {
+ write_dest_byte(0x80);
+ write_dest_byte(0x10);
+ }
+
+ /* Output SAV */
+ code = SystemCodeMap[offset].SAV;
+ write_dest_byte((char)(code >> 24) & 0xff);
+ write_dest_byte((char)(code >> 16) & 0xff);
+ write_dest_byte((char)(code >> 8) & 0xff);
+ write_dest_byte((char)(code) & 0xff);
+
+ /* Output empty horizontal data */
+ for (i = 0; i < 360 * 2; ++i) {
+ write_dest_byte(0x80);
+ write_dest_byte(0x10);
+ }
+ }
+ }
+
+ return dest - base_address;
+}
+
+void fill_frame(char *Frame, int Value)
+{
+ int *OddPtr32;
+ int OddLine;
+ int *EvenPtr32;
+ int EvenLine;
+ int i;
+ int *data;
+ int m, n;
+
+ /* fill odd and even frames */
+ for (OddLine = 22, EvenLine = 285; OddLine < 263; OddLine++, EvenLine++) {
+ OddPtr32 = (int *)((Frame + (OddLine * 1716)) + 276);
+ EvenPtr32 = (int *)((Frame + (EvenLine * 1716)) + 276);
+ for (i = 0; i < 360; i++, OddPtr32++, EvenPtr32++) {
+ *OddPtr32 = Value;
+ *EvenPtr32 = Value;
+ }
+ }
+
+ for (m = 0; m < VERTICAL; m++) {
+ data = (int *)u_boot_logo.data;
+ for (OddLine = (22 + m), EvenLine = (285 + m);
+ OddLine < (u_boot_logo.height * VERTICAL) + (22 + m);
+ OddLine += VERTICAL, EvenLine += VERTICAL) {
+ OddPtr32 = (int *)((Frame + ((OddLine) * 1716)) + 276);
+ EvenPtr32 =
+ (int *)((Frame + ((EvenLine) * 1716)) + 276);
+ for (i = 0; i < u_boot_logo.width / 2; i++) {
+ /* enlarge one pixel to m x n */
+ for (n = 0; n < HORIZONTAL; n++) {
+ *OddPtr32++ = *data;
+ *EvenPtr32++ = *data;
+ }
+ data++;
+ }
+ }
+ }
+}
+
+void video_putc(const char c)
+{
+}
+
+void video_puts(const char *s)
+{
+}
+
+static int video_init(void)
+{
+ char *NTSCFrame;
+ NTSCFrame = (char *)NTSC_FRAME_ADDR;
+ NTSC_framebuffer_init(NTSCFrame);
+ fill_frame(NTSCFrame, BLUE);
+
+ *pPPI_CONTROL = 0x0082;
+ *pPPI_FRAME = 0x020D;
+
+ *pDMA0_START_ADDR = NTSCFrame;
+ *pDMA0_X_COUNT = 0x035A;
+ *pDMA0_X_MODIFY = 0x0002;
+ *pDMA0_Y_COUNT = 0x020D;
+ *pDMA0_Y_MODIFY = 0x0002;
+ *pDMA0_CONFIG = 0x1015;
+ *pPPI_CONTROL = 0x0083;
+ return 0;
+}
+
+int drv_video_init(void)
+{
+ int error, devices = 1;
+
+ device_t videodev;
+
+ video_init(); /* Video initialization */
+
+ memset(&videodev, 0, sizeof(videodev));
+
+ strcpy(videodev.name, "video");
+ videodev.ext = DEV_EXT_VIDEO; /* Video extensions */
+ videodev.flags = DEV_FLAGS_OUTPUT; /* Output only */
+ videodev.putc = video_putc; /* 'putc' function */
+ videodev.puts = video_puts; /* 'puts' function */
+
+ error = device_register(&videodev);
+
+ return (error == 0) ? devices : error;
+}
+#endif
diff --git a/cpu/bf537/video.h b/cpu/bf537/video.h
new file mode 100644
index 0000000..a43553f
--- /dev/null
+++ b/cpu/bf537/video.h
@@ -0,0 +1,25 @@
+#include <video_logo.h>
+#define write_dest_byte(val) {*dest++=val;}
+#define BLACK (0x01800180) /* black pixel pattern */
+#define BLUE (0x296E29F0) /* blue pixel pattern */
+#define RED (0x51F0515A) /* red pixel pattern */
+#define MAGENTA (0x6ADE6ACA) /* magenta pixel pattern*/
+#define GREEN (0x91229136) /* green pixel pattern */
+#define CYAN (0xAA10AAA6) /* cyan pixel pattern */
+#define YELLOW (0xD292D210) /* yellow pixel pattern */
+#define WHITE (0xFE80FE80) /* white pixel pattern */
+
+#define true 1
+#define false 0
+
+typedef struct {
+ unsigned int SAV;
+ unsigned int EAV;
+} SystemCodeType;
+
+const SystemCodeType SystemCodeMap[4] = {
+ {0xFF000080, 0xFF00009D},
+ {0xFF0000AB, 0xFF0000B6},
+ {0xFF0000C7, 0xFF0000DA},
+ {0xFF0000EC, 0xFF0000F1}
+};
generated by cgit v1.1 at 2024-11-07 22:43:52 +0000