[PATCH] powerpc: Unify udbg (#2)

This patch unifies udbg for both ppc32 and ppc64 when building the
merged achitecture. xmon now has a single "back end". The powermac udbg
stuff gets enriched with some ADB capabilities and btext output. In
addition, the early_init callback is now called on ppc32 as well,
approx. in the same order as ppc64 regarding device-tree manipulations.
The init sequences of ppc32 and ppc64 are getting closer, I'll unify
them in a later patch.

For now, you can force udbg to the scc using "sccdbg" or to btext using
"btextdbg" on powermacs. I'll implement a cleaner way of forcing udbg
output to something else than the autodetected OF output device in a
later patch.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

4 files changed, 20 insertions, 14 deletions

diff --git a/include/asm-powerpc/btext.h b/include/asm-powerpc/btext.h
index 71cce36bc63..906f46e3100 100644
--- a/include/asm-powerpc/btext.h
+++ b/include/asm-powerpc/btext.h
@@ -7,21 +7,22 @@
 #define __PPC_BTEXT_H
 #ifdef __KERNEL__
 
-extern void btext_clearscreen(void);
-extern void btext_flushscreen(void);
-
-extern int boot_text_mapped;
-
-extern int btext_initialize(struct device_node *np);
-
-extern void map_boot_text(void);
-extern void init_boot_display(void);
+extern int btext_find_display(int allow_nonstdout);
 extern void btext_update_display(unsigned long phys, int width, int height,
 				 int depth, int pitch);
+extern void btext_setup_display(int width, int height, int depth, int pitch,
+				unsigned long address);
+extern void btext_prepare_BAT(void);
+extern void btext_unmap(void);
 
 extern void btext_drawchar(char c);
 extern void btext_drawstring(const char *str);
 extern void btext_drawhex(unsigned long v);
+extern void btext_drawtext(const char *c, unsigned int len);
+
+extern void btext_clearscreen(void);
+extern void btext_flushscreen(void);
+extern void btext_flushline(void);
 
 #endif /* __KERNEL__ */
 #endif /* __PPC_BTEXT_H */
diff --git a/include/asm-powerpc/udbg.h b/include/asm-powerpc/udbg.h
index 4049a96dc43..8d6b44c8f35 100644
--- a/include/asm-powerpc/udbg.h
+++ b/include/asm-powerpc/udbg.h
@@ -13,8 +13,8 @@
 #include <linux/compiler.h>
 #include <linux/init.h>
 
-extern void (*udbg_putc)(unsigned char c);
-extern unsigned char (*udbg_getc)(void);
+extern void (*udbg_putc)(char c);
+extern char (*udbg_getc)(void);
 extern int (*udbg_getc_poll)(void);
 
 extern void udbg_puts(const char *s);
@@ -30,5 +30,8 @@ extern unsigned int udbg_probe_uart_speed(void __iomem *comport,
 					  unsigned int clock);
 
 struct device_node;
-extern void udbg_init_scc(struct device_node *np);
+extern void udbg_scc_init(int force_scc);
+extern int udbg_adb_init(int force_btext);
+extern void udbg_adb_init_early(void);
+
 #endif /* _ASM_POWERPC_UDBG_H */
diff --git a/include/asm-ppc/btext.h b/include/asm-ppc/btext.h
index ccaefabe0bf..ed3630251b3 100644
--- a/include/asm-ppc/btext.h
+++ b/include/asm-ppc/btext.h
@@ -17,7 +17,7 @@ extern unsigned long disp_BAT[2];
 extern boot_infos_t disp_bi;
 extern int boot_text_mapped;
 
-extern void init_boot_display(void);
+extern void btext_init(boot_infos_t *bi);
 extern void btext_welcome(void);
 extern void btext_prepare_BAT(void);
 extern void btext_setup_display(int width, int height, int depth, int pitch,
diff --git a/include/asm-ppc/machdep.h b/include/asm-ppc/machdep.h
index f01255bd1dc..39200def8d1 100644
--- a/include/asm-ppc/machdep.h
+++ b/include/asm-ppc/machdep.h
@@ -35,8 +35,10 @@ struct machdep_calls {
 	int		(*get_irq)(struct pt_regs *);
 	
 	/* A general init function, called by ppc_init in init/main.c.
-	   May be NULL. */
+	   May be NULL. DEPRECATED ! */
 	void		(*init)(void);
+	/* For compatibility with merged platforms */
+	void		(*init_early)(void);
 
 	void		(*restart)(char *cmd);
 	void		(*power_off)(void);