2 * Picvue PVC160206 display driver
4 * Brian Murphy <brian@murphy.dk>
7 #include <linux/kernel.h>
8 #include <linux/delay.h>
9 #include <asm/bootinfo.h>
10 #include <asm/lasat/lasat.h>
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/errno.h>
14 #include <linux/string.h>
20 #define PVC_DISPMEM 80
21 #define PVC_LINELEN PVC_DISPMEM / PVC_NLINES
23 struct pvc_defs
*picvue
;
25 DECLARE_MUTEX(pvc_sem
);
27 static void pvc_reg_write(u32 val
)
32 static u32
pvc_reg_read(void)
34 u32 tmp
= *picvue
->reg
;
38 static void pvc_write_byte(u32 data
, u8 byte
)
42 data
&= ~picvue
->data_mask
;
43 data
|= byte
<< picvue
->data_shift
;
46 pvc_reg_write(data
& ~picvue
->e
);
50 static u8
pvc_read_byte(u32 data
)
57 byte
= (pvc_reg_read() & picvue
->data_mask
) >> picvue
->data_shift
;
64 static u8
pvc_read_data(void)
66 u32 data
= pvc_reg_read();
72 byte
= pvc_read_byte(data
);
79 static int pvc_wait(void)
84 while ((pvc_read_data() & PVC_BUSY
) && i
)
94 static void pvc_write(u8 byte
, int mode
)
96 u32 data
= pvc_reg_read();
98 if (mode
== MODE_DATA
)
104 pvc_write_byte(data
, byte
);
105 if (mode
== MODE_DATA
)
113 void pvc_write_string(const unsigned char *str
, u8 addr
, int line
)
117 if (line
> 0 && (PVC_NLINES
> 1))
119 pvc_write(0x80 | addr
, MODE_INST
);
121 while (*str
!= 0 && i
< PVC_LINELEN
) {
122 pvc_write(*str
++, MODE_DATA
);
127 void pvc_write_string_centered(const unsigned char *str
, int line
)
129 int len
= strlen(str
);
132 if (len
> PVC_VISIBLE_CHARS
)
135 addr
= (PVC_VISIBLE_CHARS
- strlen(str
))/2;
137 pvc_write_string(str
, addr
, line
);
140 void pvc_dump_string(const unsigned char *str
)
142 int len
= strlen(str
);
144 pvc_write_string(str
, 0, 0);
145 if (len
> PVC_VISIBLE_CHARS
)
146 pvc_write_string(&str
[PVC_VISIBLE_CHARS
], 0, 1);
150 #define MAX_PROGRAMMABLE_CHARS 8
151 int pvc_program_cg(int charnum
, u8 bitmap
[BM_SIZE
])
156 if (charnum
> MAX_PROGRAMMABLE_CHARS
)
160 pvc_write(0x40 | addr
, MODE_INST
);
162 for (i
= 0; i
< BM_SIZE
; i
++)
163 pvc_write(bitmap
[i
], MODE_DATA
);
167 #define FUNC_SET_CMD 0x20
168 #define EIGHT_BYTE (1 << 4)
170 #define TWO_LINES (1 << 3)
172 #define LARGE_FONT (1 << 2)
175 static void pvc_funcset(u8 cmd
)
177 pvc_write(FUNC_SET_CMD
| (cmd
& (EIGHT_BYTE
|TWO_LINES
|LARGE_FONT
)),
181 #define ENTRYMODE_CMD 0x4
182 #define AUTO_INC (1 << 1)
184 #define CURSOR_FOLLOWS_DISP (1 << 0)
186 static void pvc_entrymode(u8 cmd
)
188 pvc_write(ENTRYMODE_CMD
| (cmd
& (AUTO_INC
|CURSOR_FOLLOWS_DISP
)),
192 #define DISP_CNT_CMD 0x08
194 #define DISP_ON (1 << 2)
195 #define CUR_ON (1 << 1)
196 #define CUR_BLINK (1 << 0)
197 void pvc_dispcnt(u8 cmd
)
199 pvc_write(DISP_CNT_CMD
| (cmd
& (DISP_ON
|CUR_ON
|CUR_BLINK
)), MODE_INST
);
202 #define MOVE_CMD 0x10
203 #define DISPLAY (1 << 3)
205 #define RIGHT (1 << 2)
207 void pvc_move(u8 cmd
)
209 pvc_write(MOVE_CMD
| (cmd
& (DISPLAY
|RIGHT
)), MODE_INST
);
212 #define CLEAR_CMD 0x1
215 pvc_write(CLEAR_CMD
, MODE_INST
);
221 pvc_write(HOME_CMD
, MODE_INST
);
229 cmd
|= (SMALL_FONT
|TWO_LINES
);
231 cmd
|= (LARGE_FONT
|ONE_LINE
);
233 pvc_dispcnt(DISP_ON
);
234 pvc_entrymode(AUTO_INC
);
237 pvc_write_string_centered("Display", 0);
238 pvc_write_string_centered("Initialized", 1);
243 module_init(pvc_init
);
244 MODULE_LICENSE("GPL");
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