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 = NULL;
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);
145 pvc_write_string(str, 0, 0);
146 if (len > PVC_VISIBLE_CHARS)
147 pvc_write_string(&str[PVC_VISIBLE_CHARS], 0, 1);
151 #define MAX_PROGRAMMABLE_CHARS 8
152 int pvc_program_cg(int charnum, u8 bitmap[BM_SIZE])
157 if (charnum > MAX_PROGRAMMABLE_CHARS)
161 pvc_write(0x40 | addr, MODE_INST);
163 for (i=0; i<BM_SIZE; i++)
164 pvc_write(bitmap[i], MODE_DATA);
168 #define FUNC_SET_CMD 0x20
169 #define EIGHT_BYTE (1 << 4)
171 #define TWO_LINES (1 << 3)
173 #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)), MODE_INST);
180 #define ENTRYMODE_CMD 0x4
181 #define AUTO_INC (1 << 1)
183 #define CURSOR_FOLLOWS_DISP (1 << 0)
184 static void pvc_entrymode(u8 cmd)
186 pvc_write(ENTRYMODE_CMD | (cmd & (AUTO_INC|CURSOR_FOLLOWS_DISP)), MODE_INST);
189 #define DISP_CNT_CMD 0x08
191 #define DISP_ON (1 << 2)
192 #define CUR_ON (1 << 1)
193 #define CUR_BLINK (1 << 0)
194 void pvc_dispcnt(u8 cmd)
196 pvc_write(DISP_CNT_CMD | (cmd & (DISP_ON|CUR_ON|CUR_BLINK)), MODE_INST);
199 #define MOVE_CMD 0x10
200 #define DISPLAY (1 << 3)
202 #define RIGHT (1 << 2)
204 void pvc_move(u8 cmd)
206 pvc_write(MOVE_CMD | (cmd & (DISPLAY|RIGHT)), MODE_INST);
209 #define CLEAR_CMD 0x1
212 pvc_write(CLEAR_CMD, MODE_INST);
218 pvc_write(HOME_CMD, MODE_INST);
226 cmd |= (SMALL_FONT|TWO_LINES);
228 cmd |= (LARGE_FONT|ONE_LINE);
230 pvc_dispcnt(DISP_ON);
231 pvc_entrymode(AUTO_INC);
234 pvc_write_string_centered("Display", 0);
235 pvc_write_string_centered("Initialized", 1);
240 module_init(pvc_init);
241 MODULE_LICENSE("GPL");