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");