Parallel LCD: add control register (CR) register definition and write function.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

mzapo_parlcd.c

@@ -23,6 +23,11 @@
 #include "mzapo_parlcd.h"
 #include "mzapo_regs.h"
 
+void parlcd_write_cr(unsigned char *parlcd_mem_base, uint16_t data)
+{
+  *(volatile uint16_t*)(parlcd_mem_base + PARLCD_REG_CR_o) = data;
+}
+
 void parlcd_write_cmd(unsigned char *parlcd_mem_base, uint16_t cmd)
 {
   *(volatile uint16_t*)(parlcd_mem_base + PARLCD_REG_CMD_o) = cmd;

mzapo_parlcd.h

@@ -21,6 +21,8 @@
 extern "C" {
 #endif
 
+void parlcd_write_cr(unsigned char *parlcd_mem_base, uint16_t data);
+
 void parlcd_write_cmd(unsigned char *parlcd_mem_base, uint16_t cmd);
 
 void parlcd_write_data(unsigned char *parlcd_mem_base, uint16_t data);

mzapo_regs.h

@@ -45,6 +45,8 @@
 #define PARLCD_REG_BASE_PHYS  0x43c00000
 #define PARLCD_REG_SIZE       0x00004000
 
+#define PARLCD_REG_CR_o                 0x0000
+#define PARLCD_REG_CR_RESET_m                  0x00000010
 #define PARLCD_REG_CMD_o                0x0008
 #define PARLCD_REG_DATA_o               0x000C