staging: panel: Refactor LCD init code
Rework lcd_init method to make it a little bit more clear about the precedence of the params, move LCD geometry and pins layout to the LCD struct and thus make the LCD-related module params effectively read-only. Signed-off-by: Mariusz Gorski <marius.gorski@gmail.com> Acked-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mariusz Gorski
Greg Kroah-Hartman
parent
87b8e0c881
commit
8037e2a3c0
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@ -225,6 +225,21 @@ static wait_queue_head_t keypad_read_wait;
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/* lcd-specific variables */
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static struct {
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bool enabled;
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int height;
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int width;
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int bwidth;
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int hwidth;
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int charset;
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int proto;
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/* TODO: use union here? */
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struct {
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int e;
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int rs;
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int rw;
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int cl;
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int da;
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int bl;
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} pins;
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} lcd;
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/* Needed only for init */
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@ -766,7 +781,7 @@ static void lcd_send_serial(int byte)
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/* turn the backlight on or off */
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static void lcd_backlight(int on)
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{
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if (lcd_bl_pin == PIN_NONE)
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if (lcd.pins.bl == PIN_NONE)
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return;
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/* The backlight is activated by setting the AUTOFEED line to +5V */
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@ -865,23 +880,23 @@ static void lcd_write_data_tilcd(int data)
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static void lcd_gotoxy(void)
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{
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lcd_write_cmd(0x80 /* set DDRAM address */
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| (lcd_addr_y ? lcd_hwidth : 0)
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| (lcd_addr_y ? lcd.hwidth : 0)
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/* we force the cursor to stay at the end of the
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line if it wants to go farther */
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| ((lcd_addr_x < lcd_bwidth) ? lcd_addr_x &
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(lcd_hwidth - 1) : lcd_bwidth - 1));
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| ((lcd_addr_x < lcd.bwidth) ? lcd_addr_x &
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(lcd.hwidth - 1) : lcd.bwidth - 1));
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}
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static void lcd_print(char c)
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{
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if (lcd_addr_x < lcd_bwidth) {
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if (lcd_addr_x < lcd.bwidth) {
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if (lcd_char_conv != NULL)
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c = lcd_char_conv[(unsigned char)c];
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lcd_write_data(c);
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lcd_addr_x++;
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}
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/* prevents the cursor from wrapping onto the next line */
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if (lcd_addr_x == lcd_bwidth)
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if (lcd_addr_x == lcd.bwidth)
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lcd_gotoxy();
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}
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@ -895,7 +910,7 @@ static void lcd_clear_fast_s(void)
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lcd_gotoxy();
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spin_lock_irq(&pprt_lock);
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for (pos = 0; pos < lcd_height * lcd_hwidth; pos++) {
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for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) {
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lcd_send_serial(0x5F); /* R/W=W, RS=1 */
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lcd_send_serial(' ' & 0x0F);
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lcd_send_serial((' ' >> 4) & 0x0F);
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@ -918,7 +933,7 @@ static void lcd_clear_fast_p8(void)
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lcd_gotoxy();
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spin_lock_irq(&pprt_lock);
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for (pos = 0; pos < lcd_height * lcd_hwidth; pos++) {
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for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) {
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/* present the data to the data port */
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w_dtr(pprt, ' ');
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@ -956,7 +971,7 @@ static void lcd_clear_fast_tilcd(void)
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lcd_gotoxy();
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spin_lock_irq(&pprt_lock);
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for (pos = 0; pos < lcd_height * lcd_hwidth; pos++) {
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for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) {
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/* present the data to the data port */
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w_dtr(pprt, ' ');
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udelay(60);
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@ -981,7 +996,7 @@ static void lcd_clear_display(void)
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static void lcd_init_display(void)
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{
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lcd_flags = ((lcd_height > 1) ? LCD_FLAG_N : 0)
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lcd_flags = ((lcd.height > 1) ? LCD_FLAG_N : 0)
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| LCD_FLAG_D | LCD_FLAG_C | LCD_FLAG_B;
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long_sleep(20); /* wait 20 ms after power-up for the paranoid */
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@ -1095,17 +1110,17 @@ static inline int handle_lcd_special_code(void)
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case 'l': /* Shift Cursor Left */
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if (lcd_addr_x > 0) {
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/* back one char if not at end of line */
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if (lcd_addr_x < lcd_bwidth)
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if (lcd_addr_x < lcd.bwidth)
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lcd_write_cmd(0x10);
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lcd_addr_x--;
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}
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processed = 1;
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break;
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case 'r': /* shift cursor right */
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if (lcd_addr_x < lcd_width) {
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if (lcd_addr_x < lcd.width) {
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/* allow the cursor to pass the end of the line */
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if (lcd_addr_x <
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(lcd_bwidth - 1))
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(lcd.bwidth - 1))
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lcd_write_cmd(0x14);
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lcd_addr_x++;
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}
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@ -1124,7 +1139,7 @@ static inline int handle_lcd_special_code(void)
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case 'k': { /* kill end of line */
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int x;
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for (x = lcd_addr_x; x < lcd_bwidth; x++)
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for (x = lcd_addr_x; x < lcd.bwidth; x++)
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lcd_write_data(' ');
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/* restore cursor position */
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@ -1272,7 +1287,7 @@ static void lcd_write_char(char c)
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if (lcd_addr_x > 0) {
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/* check if we're not at the
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end of the line */
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if (lcd_addr_x < lcd_bwidth)
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if (lcd_addr_x < lcd.bwidth)
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/* back one char */
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lcd_write_cmd(0x10);
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lcd_addr_x--;
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@ -1289,10 +1304,10 @@ static void lcd_write_char(char c)
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case '\n':
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/* flush the remainder of the current line and
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go to the beginning of the next line */
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for (; lcd_addr_x < lcd_bwidth; lcd_addr_x++)
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for (; lcd_addr_x < lcd.bwidth; lcd_addr_x++)
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lcd_write_data(' ');
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lcd_addr_x = 0;
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lcd_addr_y = (lcd_addr_y + 1) % lcd_height;
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lcd_addr_y = (lcd_addr_y + 1) % lcd.height;
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lcd_gotoxy();
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break;
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case '\r':
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@ -1421,174 +1436,164 @@ static void lcd_init(void)
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switch (selected_lcd_type) {
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case LCD_TYPE_OLD:
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/* parallel mode, 8 bits */
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if (lcd_proto == NOT_SET)
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lcd_proto = LCD_PROTO_PARALLEL;
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if (lcd_charset == NOT_SET)
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lcd_charset = LCD_CHARSET_NORMAL;
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if (lcd_e_pin == PIN_NOT_SET)
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lcd_e_pin = PIN_STROBE;
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if (lcd_rs_pin == PIN_NOT_SET)
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lcd_rs_pin = PIN_AUTOLF;
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lcd.proto = LCD_PROTO_PARALLEL;
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lcd.charset = LCD_CHARSET_NORMAL;
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lcd.pins.e = PIN_STROBE;
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lcd.pins.rs = PIN_AUTOLF;
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if (lcd_width == NOT_SET)
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lcd_width = 40;
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if (lcd_bwidth == NOT_SET)
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lcd_bwidth = 40;
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if (lcd_hwidth == NOT_SET)
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lcd_hwidth = 64;
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if (lcd_height == NOT_SET)
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lcd_height = 2;
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lcd.width = 40;
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lcd.bwidth = 40;
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lcd.hwidth = 64;
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lcd.height = 2;
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break;
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case LCD_TYPE_KS0074:
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/* serial mode, ks0074 */
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if (lcd_proto == NOT_SET)
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lcd_proto = LCD_PROTO_SERIAL;
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if (lcd_charset == NOT_SET)
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lcd_charset = LCD_CHARSET_KS0074;
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if (lcd_bl_pin == PIN_NOT_SET)
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lcd_bl_pin = PIN_AUTOLF;
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if (lcd_cl_pin == PIN_NOT_SET)
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lcd_cl_pin = PIN_STROBE;
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if (lcd_da_pin == PIN_NOT_SET)
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lcd_da_pin = PIN_D0;
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lcd.proto = LCD_PROTO_SERIAL;
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lcd.charset = LCD_CHARSET_KS0074;
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lcd.pins.bl = PIN_AUTOLF;
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lcd.pins.cl = PIN_STROBE;
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lcd.pins.da = PIN_D0;
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if (lcd_width == NOT_SET)
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lcd_width = 16;
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if (lcd_bwidth == NOT_SET)
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lcd_bwidth = 40;
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if (lcd_hwidth == NOT_SET)
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lcd_hwidth = 16;
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if (lcd_height == NOT_SET)
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lcd_height = 2;
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lcd.width = 16;
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lcd.bwidth = 40;
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lcd.hwidth = 16;
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lcd.height = 2;
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break;
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case LCD_TYPE_NEXCOM:
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/* parallel mode, 8 bits, generic */
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if (lcd_proto == NOT_SET)
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lcd_proto = LCD_PROTO_PARALLEL;
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if (lcd_charset == NOT_SET)
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lcd_charset = LCD_CHARSET_NORMAL;
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if (lcd_e_pin == PIN_NOT_SET)
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lcd_e_pin = PIN_AUTOLF;
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if (lcd_rs_pin == PIN_NOT_SET)
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lcd_rs_pin = PIN_SELECP;
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if (lcd_rw_pin == PIN_NOT_SET)
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lcd_rw_pin = PIN_INITP;
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lcd.proto = LCD_PROTO_PARALLEL;
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lcd.charset = LCD_CHARSET_NORMAL;
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lcd.pins.e = PIN_AUTOLF;
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lcd.pins.rs = PIN_SELECP;
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lcd.pins.rw = PIN_INITP;
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if (lcd_width == NOT_SET)
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lcd_width = 16;
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if (lcd_bwidth == NOT_SET)
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lcd_bwidth = 40;
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if (lcd_hwidth == NOT_SET)
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lcd_hwidth = 64;
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if (lcd_height == NOT_SET)
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lcd_height = 2;
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lcd.width = 16;
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lcd.bwidth = 40;
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lcd.hwidth = 64;
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lcd.height = 2;
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break;
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case LCD_TYPE_CUSTOM:
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/* customer-defined */
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if (lcd_proto == NOT_SET)
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lcd_proto = DEFAULT_LCD_PROTO;
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if (lcd_charset == NOT_SET)
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lcd_charset = DEFAULT_LCD_CHARSET;
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lcd.proto = DEFAULT_LCD_PROTO;
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lcd.charset = DEFAULT_LCD_CHARSET;
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/* default geometry will be set later */
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break;
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case LCD_TYPE_HANTRONIX:
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/* parallel mode, 8 bits, hantronix-like */
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default:
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if (lcd_proto == NOT_SET)
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lcd_proto = LCD_PROTO_PARALLEL;
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if (lcd_charset == NOT_SET)
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lcd_charset = LCD_CHARSET_NORMAL;
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if (lcd_e_pin == PIN_NOT_SET)
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lcd_e_pin = PIN_STROBE;
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if (lcd_rs_pin == PIN_NOT_SET)
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lcd_rs_pin = PIN_SELECP;
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lcd.proto = LCD_PROTO_PARALLEL;
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lcd.charset = LCD_CHARSET_NORMAL;
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lcd.pins.e = PIN_STROBE;
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lcd.pins.rs = PIN_SELECP;
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if (lcd_width == NOT_SET)
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lcd_width = 16;
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if (lcd_bwidth == NOT_SET)
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lcd_bwidth = 40;
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if (lcd_hwidth == NOT_SET)
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lcd_hwidth = 64;
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if (lcd_height == NOT_SET)
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lcd_height = 2;
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lcd.width = 16;
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lcd.bwidth = 40;
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lcd.hwidth = 64;
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lcd.height = 2;
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break;
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}
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/* this is used to catch wrong and default values */
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if (lcd_width <= 0)
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lcd_width = DEFAULT_LCD_WIDTH;
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if (lcd_bwidth <= 0)
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lcd_bwidth = DEFAULT_LCD_BWIDTH;
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if (lcd_hwidth <= 0)
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lcd_hwidth = DEFAULT_LCD_HWIDTH;
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if (lcd_height <= 0)
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lcd_height = DEFAULT_LCD_HEIGHT;
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/* Overwrite with module params set on loading */
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if (lcd_height > -1)
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lcd.height = lcd_height;
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if (lcd_width > -1)
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lcd.width = lcd_width;
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if (lcd_bwidth > -1)
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lcd.bwidth = lcd_bwidth;
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if (lcd_hwidth > -1)
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lcd.hwidth = lcd_hwidth;
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if (lcd_charset > -1)
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lcd.charset = lcd_charset;
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if (lcd_proto > -1)
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lcd.proto = lcd_proto;
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if (lcd_e_pin != PIN_NOT_SET)
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lcd.pins.e = lcd_e_pin;
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if (lcd_rs_pin != PIN_NOT_SET)
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lcd.pins.rs = lcd_rs_pin;
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if (lcd_rw_pin != PIN_NOT_SET)
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lcd.pins.rw = lcd_rw_pin;
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if (lcd_cl_pin != PIN_NOT_SET)
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lcd.pins.cl = lcd_cl_pin;
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if (lcd_da_pin != PIN_NOT_SET)
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lcd.pins.da = lcd_da_pin;
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if (lcd_bl_pin != PIN_NOT_SET)
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lcd.pins.bl = lcd_bl_pin;
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if (lcd_proto == LCD_PROTO_SERIAL) { /* SERIAL */
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/* this is used to catch wrong and default values */
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if (lcd.width <= 0)
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lcd.width = DEFAULT_LCD_WIDTH;
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if (lcd.bwidth <= 0)
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lcd.bwidth = DEFAULT_LCD_BWIDTH;
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if (lcd.hwidth <= 0)
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lcd.hwidth = DEFAULT_LCD_HWIDTH;
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if (lcd.height <= 0)
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lcd.height = DEFAULT_LCD_HEIGHT;
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if (lcd.proto == LCD_PROTO_SERIAL) { /* SERIAL */
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lcd_write_cmd = lcd_write_cmd_s;
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lcd_write_data = lcd_write_data_s;
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lcd_clear_fast = lcd_clear_fast_s;
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if (lcd_cl_pin == PIN_NOT_SET)
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lcd_cl_pin = DEFAULT_LCD_PIN_SCL;
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if (lcd_da_pin == PIN_NOT_SET)
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lcd_da_pin = DEFAULT_LCD_PIN_SDA;
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if (lcd.pins.cl == PIN_NOT_SET)
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lcd.pins.cl = DEFAULT_LCD_PIN_SCL;
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if (lcd.pins.da == PIN_NOT_SET)
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lcd.pins.da = DEFAULT_LCD_PIN_SDA;
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} else if (lcd_proto == LCD_PROTO_PARALLEL) { /* PARALLEL */
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} else if (lcd.proto == LCD_PROTO_PARALLEL) { /* PARALLEL */
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lcd_write_cmd = lcd_write_cmd_p8;
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lcd_write_data = lcd_write_data_p8;
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lcd_clear_fast = lcd_clear_fast_p8;
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if (lcd_e_pin == PIN_NOT_SET)
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lcd_e_pin = DEFAULT_LCD_PIN_E;
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if (lcd_rs_pin == PIN_NOT_SET)
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lcd_rs_pin = DEFAULT_LCD_PIN_RS;
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if (lcd_rw_pin == PIN_NOT_SET)
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lcd_rw_pin = DEFAULT_LCD_PIN_RW;
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if (lcd.pins.e == PIN_NOT_SET)
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lcd.pins.e = DEFAULT_LCD_PIN_E;
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if (lcd.pins.rs == PIN_NOT_SET)
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lcd.pins.rs = DEFAULT_LCD_PIN_RS;
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if (lcd.pins.rw == PIN_NOT_SET)
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lcd.pins.rw = DEFAULT_LCD_PIN_RW;
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} else {
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lcd_write_cmd = lcd_write_cmd_tilcd;
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lcd_write_data = lcd_write_data_tilcd;
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lcd_clear_fast = lcd_clear_fast_tilcd;
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}
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if (lcd_bl_pin == PIN_NOT_SET)
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lcd_bl_pin = DEFAULT_LCD_PIN_BL;
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if (lcd.pins.bl == PIN_NOT_SET)
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lcd.pins.bl = DEFAULT_LCD_PIN_BL;
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if (lcd_e_pin == PIN_NOT_SET)
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lcd_e_pin = PIN_NONE;
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if (lcd_rs_pin == PIN_NOT_SET)
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lcd_rs_pin = PIN_NONE;
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if (lcd_rw_pin == PIN_NOT_SET)
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lcd_rw_pin = PIN_NONE;
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if (lcd_bl_pin == PIN_NOT_SET)
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lcd_bl_pin = PIN_NONE;
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if (lcd_cl_pin == PIN_NOT_SET)
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lcd_cl_pin = PIN_NONE;
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if (lcd_da_pin == PIN_NOT_SET)
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lcd_da_pin = PIN_NONE;
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if (lcd.pins.e == PIN_NOT_SET)
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lcd.pins.e = PIN_NONE;
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if (lcd.pins.rs == PIN_NOT_SET)
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lcd.pins.rs = PIN_NONE;
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if (lcd.pins.rw == PIN_NOT_SET)
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lcd.pins.rw = PIN_NONE;
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if (lcd.pins.bl == PIN_NOT_SET)
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lcd.pins.bl = PIN_NONE;
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if (lcd.pins.cl == PIN_NOT_SET)
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lcd.pins.cl = PIN_NONE;
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if (lcd.pins.da == PIN_NOT_SET)
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lcd.pins.da = PIN_NONE;
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if (lcd_charset == NOT_SET)
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lcd_charset = DEFAULT_LCD_CHARSET;
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if (lcd.charset == NOT_SET)
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lcd.charset = DEFAULT_LCD_CHARSET;
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|
||||
if (lcd_charset == LCD_CHARSET_KS0074)
|
||||
if (lcd.charset == LCD_CHARSET_KS0074)
|
||||
lcd_char_conv = lcd_char_conv_ks0074;
|
||||
else
|
||||
lcd_char_conv = NULL;
|
||||
|
||||
if (lcd_bl_pin != PIN_NONE)
|
||||
if (lcd.pins.bl != PIN_NONE)
|
||||
init_scan_timer();
|
||||
|
||||
pin_to_bits(lcd_e_pin, lcd_bits[LCD_PORT_D][LCD_BIT_E],
|
||||
pin_to_bits(lcd.pins.e, lcd_bits[LCD_PORT_D][LCD_BIT_E],
|
||||
lcd_bits[LCD_PORT_C][LCD_BIT_E]);
|
||||
pin_to_bits(lcd_rs_pin, lcd_bits[LCD_PORT_D][LCD_BIT_RS],
|
||||
pin_to_bits(lcd.pins.rs, lcd_bits[LCD_PORT_D][LCD_BIT_RS],
|
||||
lcd_bits[LCD_PORT_C][LCD_BIT_RS]);
|
||||
pin_to_bits(lcd_rw_pin, lcd_bits[LCD_PORT_D][LCD_BIT_RW],
|
||||
pin_to_bits(lcd.pins.rw, lcd_bits[LCD_PORT_D][LCD_BIT_RW],
|
||||
lcd_bits[LCD_PORT_C][LCD_BIT_RW]);
|
||||
pin_to_bits(lcd_bl_pin, lcd_bits[LCD_PORT_D][LCD_BIT_BL],
|
||||
pin_to_bits(lcd.pins.bl, lcd_bits[LCD_PORT_D][LCD_BIT_BL],
|
||||
lcd_bits[LCD_PORT_C][LCD_BIT_BL]);
|
||||
pin_to_bits(lcd_cl_pin, lcd_bits[LCD_PORT_D][LCD_BIT_CL],
|
||||
pin_to_bits(lcd.pins.cl, lcd_bits[LCD_PORT_D][LCD_BIT_CL],
|
||||
lcd_bits[LCD_PORT_C][LCD_BIT_CL]);
|
||||
pin_to_bits(lcd_da_pin, lcd_bits[LCD_PORT_D][LCD_BIT_DA],
|
||||
pin_to_bits(lcd.pins.da, lcd_bits[LCD_PORT_D][LCD_BIT_DA],
|
||||
lcd_bits[LCD_PORT_C][LCD_BIT_DA]);
|
||||
|
||||
/* before this line, we must NOT send anything to the display.
|
||||
|
|
@ -2278,6 +2283,23 @@ static int __init panel_init_module(void)
|
|||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* Init lcd struct with load-time values to preserve exact current
|
||||
* functionality (at least for now).
|
||||
*/
|
||||
lcd.height = lcd_height;
|
||||
lcd.width = lcd_width;
|
||||
lcd.bwidth = lcd_bwidth;
|
||||
lcd.hwidth = lcd_hwidth;
|
||||
lcd.charset = lcd_charset;
|
||||
lcd.proto = lcd_proto;
|
||||
lcd.pins.e = lcd_e_pin;
|
||||
lcd.pins.rs = lcd_rs_pin;
|
||||
lcd.pins.rw = lcd_rw_pin;
|
||||
lcd.pins.cl = lcd_cl_pin;
|
||||
lcd.pins.da = lcd_da_pin;
|
||||
lcd.pins.bl = lcd_bl_pin;
|
||||
|
||||
/*
|
||||
* Overwrite selection with module param values (both keypad and lcd),
|
||||
* where the deprecated params have lower prio.
|
||||
|
|
|
|||
Loading…
Reference in New Issue