summaryrefslogtreecommitdiffstats
path: root/arch/m68k/mac/debug.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/m68k/mac/debug.c')
-rw-r--r--arch/m68k/mac/debug.c366
1 files changed, 366 insertions, 0 deletions
diff --git a/arch/m68k/mac/debug.c b/arch/m68k/mac/debug.c
new file mode 100644
index 000000000..cc6f491fb
--- /dev/null
+++ b/arch/m68k/mac/debug.c
@@ -0,0 +1,366 @@
+/*
+ * linux/arch/m68k/mac/debug.c
+ *
+ * Shamelessly stolen (SCC code and general framework) from:
+ *
+ * linux/arch/m68k/atari/debug.c
+ *
+ * Atari debugging and serial console stuff
+ *
+ * Assembled of parts of former atari/config.c 97-12-18 by Roman Hodek
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/tty.h>
+#include <linux/console.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+
+#define BOOTINFO_COMPAT_1_0
+#include <asm/setup.h>
+#include <asm/bootinfo.h>
+#include <asm/machw.h>
+#include <asm/macints.h>
+
+extern char m68k_debug_device[];
+
+extern struct compat_bootinfo compat_boot_info;
+
+extern unsigned long mac_videobase;
+extern unsigned long mac_videodepth;
+extern unsigned long mac_rowbytes;
+
+/*
+ * These two auxiliary debug functions should go away ASAP. Only usage:
+ * before the console output is up (after head.S come some other crucial
+ * setup routines :-) it permits writing 'data' to the screen as bit patterns
+ * (good luck reading those). Helped to figure that the bootinfo contained
+ * garbage data on the amount and size of memory chunks ...
+ *
+ * The 'pos' argument now simply means 'linefeed after print' ...
+ */
+
+static int peng=0, line=0;
+
+void mac_debugging_short(int pos, short num)
+{
+ unsigned char *pengoffset;
+ unsigned char *pptr;
+ int i;
+
+ if (!MACH_IS_MAC) {
+ /* printk("debug: %d !\n", num); */
+ return;
+ }
+
+ /* calculate current offset */
+ pengoffset=(unsigned char *)(mac_videobase+(20+line*2)*mac_rowbytes)
+ +80*peng;
+
+ pptr=pengoffset;
+
+ for(i=0;i<8*sizeof(short);i++) /* # of bits */
+ {
+ /* value mask for bit i, reverse order */
+ *pptr++ = (num & ( 1 << (8*sizeof(short)-i-1) ) ? 0xFF : 0x00);
+ }
+
+ peng++;
+
+ if (pos) {
+ line++;
+ peng = 0;
+ }
+}
+
+void mac_debugging_long(int pos, long addr)
+{
+ unsigned char *pengoffset;
+ unsigned char *pptr;
+ int i;
+
+ if (!MACH_IS_MAC) {
+ /* printk("debug: #%ld !\n", addr); */
+ return;
+ }
+
+ pengoffset=(unsigned char *)(mac_videobase+(20+line*2)*mac_rowbytes)
+ +80*peng;
+
+ pptr=pengoffset;
+
+ for(i=0;i<8*sizeof(long);i++) /* # of bits */
+ {
+ *pptr++ = (addr & ( 1 << (8*sizeof(long)-i-1) ) ? 0xFF : 0x00);
+ }
+
+ peng++;
+
+ if (pos) {
+ line++;
+ peng = 0;
+ }
+}
+
+/*
+ * Penguin - used by head.S console; obsolete
+ */
+char that_penguin[]={
+#include "that_penguin.h"
+};
+
+/*
+ * B/W version of penguin, unfinished - any takers??
+ */
+static char bw_penguin[]={
+#include "bw_penguin.h"
+};
+
+void mac_debugging_penguin(int peng)
+{
+ unsigned char *pengoffset;
+ unsigned char *pptr;
+ unsigned char *bwpdptr=bw_penguin;
+ int i;
+
+ if (!MACH_IS_MAC)
+ return;
+
+ if (compat_boot_info.bi_mac.videodepth ==1)
+ pengoffset=(unsigned char *)(mac_videobase+80*mac_rowbytes)
+ +5*peng;
+ else
+ pengoffset=(unsigned char *)(mac_videobase+80*mac_rowbytes)
+ +20*peng;
+
+ pptr=pengoffset;
+
+ for(i=0;i<36;i++)
+ {
+ memcpy(pptr,bwpdptr,4);
+ bwpdptr+=4;
+ pptr+=mac_rowbytes;
+ }
+}
+
+/*
+ * B/W version of flaming Mac, unfinished (see above).
+ */
+static char bw_kaboom_map[]={
+#include "bw_mac.h"
+};
+
+static void mac_boom_boom(void)
+{
+ static unsigned char *boomoffset=NULL;
+ unsigned char *pptr;
+ unsigned char *bwpdptr=bw_kaboom_map;
+ int i;
+
+ if(!boomoffset)
+ if (compat_boot_info.bi_mac.videodepth == 1) {
+ boomoffset=(unsigned char *)(mac_videobase+160*mac_rowbytes);
+ } else {
+ boomoffset=(unsigned char *)(mac_videobase+256*mac_rowbytes);
+ }
+ else
+ if (compat_boot_info.bi_mac.videodepth == 1)
+ boomoffset+=5;
+ else
+ boomoffset+=32;
+
+ pptr=boomoffset;
+
+ for(i=0;i<36;i++)
+ {
+ memcpy(pptr,bwpdptr,4);
+ bwpdptr+=4;
+ pptr+=mac_rowbytes;
+ }
+}
+
+void mac_boom(int booms)
+{
+ int i;
+
+ if (!MACH_IS_MAC)
+ return;
+
+ for(i=0;i<booms;i++)
+ mac_boom_boom();
+ while(1);
+}
+
+
+#if 0
+/*
+ * TODO: serial debug code
+ */
+
+/* Flag that serial port is already initialized and used */
+int mac_SCC_init_done = 0;
+/* Can be set somewhere, if a SCC master reset has already be done and should
+ * not be repeated; used by kgdb */
+int mac_SCC_reset_done = 0;
+
+static struct console mac_console_driver = {
+ "debug",
+ NULL, /* write */
+ NULL, /* read */
+ NULL, /* device */
+ NULL, /* wait_key */
+ NULL, /* unblank */
+ NULL, /* setup */
+ CON_PRINTBUFFER,
+ -1,
+ 0,
+ NULL
+};
+
+static int scc_port;
+
+static inline void mac_scc_out (char c)
+{
+ do {
+ MFPDELAY();
+ } while (!(scc.cha_b_ctrl & 0x04)); /* wait for tx buf empty */
+ MFPDELAY();
+ scc.cha_b_data = c;
+}
+
+void mac_scc_console_write (struct console *co, const char *str,
+ unsigned int count)
+{
+ while (count--) {
+ if (*str == '\n')
+ mac_scc_out( '\r' );
+ mac_scc_out( *str++ );
+ }
+}
+
+#ifdef CONFIG_SERIAL_CONSOLE
+int mac_scc_console_wait_key(struct console *co)
+{
+ do {
+ MFPDELAY();
+ } while( !(scc.cha_b_ctrl & 0x01) ); /* wait for rx buf filled */
+ MFPDELAY();
+ return( scc.cha_b_data );
+}
+#endif
+
+/* The following two functions do a quick'n'dirty initialization of the MFP or
+ * SCC serial ports. They're used by the debugging interface, kgdb, and the
+ * serial console code. */
+#define SCC_WRITE(reg,val) \
+ do { \
+ scc.cha_b_ctrl = (reg); \
+ MFPDELAY(); \
+ scc.cha_b_ctrl = (val); \
+ MFPDELAY(); \
+ } while(0)
+
+/* loops_per_sec isn't initialized yet, so we can't use udelay(). This does a
+ * delay of ~ 60us. */
+#define LONG_DELAY() \
+ do { \
+ int i; \
+ for( i = 100; i > 0; --i ) \
+ MFPDELAY(); \
+ } while(0)
+
+#ifndef CONFIG_SERIAL_CONSOLE
+__initfunc(static void mac_init_scc_port( int cflag, int port ))
+#else
+void mac_init_scc_port( int cflag, int port )
+#endif
+{
+ extern int mac_SCC_reset_done;
+ static int clksrc_table[9] =
+ /* reg 11: 0x50 = BRG, 0x00 = RTxC, 0x28 = TRxC */
+ { 0x50, 0x50, 0x50, 0x50, 0x50, 0x50, 0x50, 0x00, 0x00 };
+ static int brgsrc_table[9] =
+ /* reg 14: 0 = RTxC, 2 = PCLK */
+ { 2, 2, 2, 2, 2, 2, 0, 2, 2 };
+ static int clkmode_table[9] =
+ /* reg 4: 0x40 = x16, 0x80 = x32, 0xc0 = x64 */
+ { 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0xc0, 0x80 };
+ static int div_table[9] =
+ /* reg12 (BRG low) */
+ { 208, 138, 103, 50, 24, 11, 1, 0, 0 };
+
+ int baud = cflag & CBAUD;
+ int clksrc, clkmode, div, reg3, reg5;
+
+ if (cflag & CBAUDEX)
+ baud += B38400;
+ if (baud < B1200 || baud > B38400+2)
+ baud = B9600; /* use default 9600bps for non-implemented rates */
+ baud -= B1200; /* tables starts at 1200bps */
+
+ clksrc = clksrc_table[baud];
+ clkmode = clkmode_table[baud];
+ div = div_table[baud];
+
+ reg3 = (cflag & CSIZE) == CS8 ? 0xc0 : 0x40;
+ reg5 = (cflag & CSIZE) == CS8 ? 0x60 : 0x20 | 0x82 /* assert DTR/RTS */;
+
+ (void)scc.cha_b_ctrl; /* reset reg pointer */
+ SCC_WRITE( 9, 0xc0 ); /* reset */
+ LONG_DELAY(); /* extra delay after WR9 access */
+ SCC_WRITE( 4, (cflag & PARENB) ? ((cflag & PARODD) ? 0x01 : 0x03) : 0 |
+ 0x04 /* 1 stopbit */ |
+ clkmode );
+ SCC_WRITE( 3, reg3 );
+ SCC_WRITE( 5, reg5 );
+ SCC_WRITE( 9, 0 ); /* no interrupts */
+ LONG_DELAY(); /* extra delay after WR9 access */
+ SCC_WRITE( 10, 0 ); /* NRZ mode */
+ SCC_WRITE( 11, clksrc ); /* main clock source */
+ SCC_WRITE( 12, div ); /* BRG value */
+ SCC_WRITE( 13, 0 ); /* BRG high byte */
+ SCC_WRITE( 14, brgsrc_table[baud] );
+ SCC_WRITE( 14, brgsrc_table[baud] | (div ? 1 : 0) );
+ SCC_WRITE( 3, reg3 | 1 );
+ SCC_WRITE( 5, reg5 | 8 );
+
+ mac_SCC_reset_done = 1;
+ mac_SCC_init_done = 1;
+}
+
+
+__initfunc(void mac_debug_init(void))
+{
+#ifdef CONFIG_KGDB
+ /* the m68k_debug_device is used by the GDB stub, do nothing here */
+ return;
+#endif
+ if (!strcmp( m68k_debug_device, "ser" )) {
+ strcpy( m68k_debug_device, "ser1" );
+ }
+ if (!strcmp( m68k_debug_device, "ser1" )) {
+ /* ST-MFP Modem1 serial port */
+ mac_init_scc_port( B9600|CS8, 0 );
+ mac_console_driver.write = mac_scc_console_write;
+ }
+ else if (!strcmp( m68k_debug_device, "ser2" )) {
+ /* SCC Modem2 serial port */
+ mac_init_scc_port( B9600|CS8, 1 );
+ mac_console_driver.write = mac_scc_console_write;
+ }
+ if (mac_console_driver.write)
+ register_console(&mac_console_driver);
+}
+#endif
+
+/*
+ * Local variables:
+ * c-indent-level: 4
+ * tab-width: 8
+ * End:
+ */
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-20 09:41:08 +0000