parisc/sticon: Add user font support

This is a major rework of the sticon (parisc text console) driver in
order to support user font support.

Usually one want to use the stifb (parisc framebuffer driver) which is
based on fbcon and does support fonts and colors, but some old machines
(e.g. HP 730 workstations) don't provide a supported stifb graphic card,
and for those user fonts are preferred.

This patch drops unused code for software cursor and scrollback,
enhances the debug output and adds better documentation.

The code was tested on various machines with byte-mode and word-mode
graphic cards on GSC- and PCI-busses.
Signed-off-by: Helge Deller <deller@gmx.de>

drivers/video/console/Kconfig

@@ -119,6 +119,7 @@ config STI_CONSOLE
 	bool "STI text console"
 	depends on PARISC && HAS_IOMEM
 	select FONT_SUPPORT
+	select CRC32
 	default y
 	help
 	  The STI console is the builtin display/keyboard on HP-PARISC

drivers/video/fbdev/sticore.h

@@ -4,12 +4,6 @@
 
 /* generic STI structures & functions */
 
-#if 0
-#define DPRINTK(x)	printk x
-#else
-#define DPRINTK(x) 
-#endif
-
 #define MAX_STI_ROMS 4		/* max no. of ROMs which this driver handles */
 
 #define STI_REGION_MAX 8	/* hardcoded STI constants */
@@ -246,8 +240,12 @@ struct sti_rom_font {
 /* sticore internal font handling */
 
 struct sti_cooked_font {
-        struct sti_rom_font *raw;
+	struct sti_rom_font *raw;	/* native ptr for STI functions */
+	void *raw_ptr;			/* kmalloc'ed font data */
 	struct sti_cooked_font *next_font;
+	int height, width;
+	int refcount;
+	u32 crc;
 };
 
 struct sti_cooked_rom {
@@ -341,9 +339,6 @@ struct sti_all_data {
 struct sti_struct {
 	spinlock_t lock;
 		
-	/* the following fields needs to be filled in by the word/byte routines */
-	int font_width;	
-	int font_height;
 	/* char **mon_strings; */
 	int sti_mem_request;
 	u32 graphics_id[2];
@@ -362,6 +357,7 @@ struct sti_struct {
 
 	struct sti_glob_cfg *glob_cfg;	/* points into sti_all_data */
 
+	int wordmode;
 	struct sti_cooked_font *font;	/* ptr to selected font (cooked) */
 
 	struct pci_dev *pd;
@@ -380,6 +376,7 @@ struct sti_struct {
 /* sticore interface functions */
 
 struct sti_struct *sti_get_rom(unsigned int index); /* 0: default sti */
+void sti_font_convert_bytemode(struct sti_struct *sti, struct sti_cooked_font *f);
 
 
 /* sticore main function to call STI firmware */
@@ -391,12 +388,14 @@ int sti_call(const struct sti_struct *sti, unsigned long func,
 
 /* functions to call the STI ROM directly */
 
-void sti_putc(struct sti_struct *sti, int c, int y, int x);
+void sti_putc(struct sti_struct *sti, int c, int y, int x,
+		struct sti_cooked_font *font);
 void sti_set(struct sti_struct *sti, int src_y, int src_x,
-	     int height, int width, u8 color);
+		int height, int width, u8 color);
 void sti_clear(struct sti_struct *sti, int src_y, int src_x,
-	       int height, int width, int c);
+		int height, int width, int c, struct sti_cooked_font *font);
 void sti_bmove(struct sti_struct *sti, int src_y, int src_x,
-	       int dst_y, int dst_x, int height, int width);
+		int dst_y, int dst_x, int height, int width,
+		struct sti_cooked_font *font);
 
 #endif	/* STICORE_H */