From 03ec4d6158bd3c555b6c60b9e7476740464f19fa Mon Sep 17 00:00:00 2001
From: Uros Majstorovic <majstor@majstor.org>
Date: Sun, 4 Sep 2022 18:41:42 +0200
Subject: lcd driver

---
 fw/fe310/eos/dev/lcd.c | 125 +++++++++++++++++++++++++++++++++++++++++++++++++
 fw/fe310/eos/dev/lcd.h |   5 ++
 2 files changed, 130 insertions(+)
 create mode 100644 fw/fe310/eos/dev/lcd.c
 create mode 100644 fw/fe310/eos/dev/lcd.h

diff --git a/fw/fe310/eos/dev/lcd.c b/fw/fe310/eos/dev/lcd.c
new file mode 100644
index 0000000..69651d0
--- /dev/null
+++ b/fw/fe310/eos/dev/lcd.c
@@ -0,0 +1,125 @@
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "encoding.h"
+#include "platform.h"
+
+#include "eos.h"
+
+#include "board.h"
+
+#include "soc/timer.h"
+#include "soc/pwr.h"
+#include "eve/eve.h"
+
+#include "eve.h"
+#include "gt911.h"
+#include "ili9806e.h"
+
+#include "lcd.h"
+
+static int lcd_enable(void) {
+    int rv;
+
+    rv = eos_spi_select(EOS_SPI_DEV_EVE);
+    if (rv) return rv;
+
+    eve_gpio_set(EVE_GPIO_LCD_EN, 1);
+    eos_spi_deselect();
+
+    return EOS_OK;
+}
+
+static int lcd_disable(void) {
+    int rv;
+
+    rv = eos_spi_select(EOS_SPI_DEV_EVE);
+    if (rv) return rv;
+
+    eve_gpio_set(EVE_GPIO_LCD_EN, 0);
+    eos_spi_deselect();
+
+    return EOS_OK;
+}
+
+int lcd_select(void) {
+    int rv;
+
+    GPIO_REG(GPIO_OUTPUT_XOR)   |=  (1 << SPI_CSPIN_LCD);
+    GPIO_REG(GPIO_OUTPUT_VAL)   |=  (1 << SPI_CSPIN_LCD);
+    GPIO_REG(GPIO_OUTPUT_EN)    |=  (1 << SPI_CSPIN_LCD);
+
+    rv = eos_spi_select(EOS_SPI_DEV_LCD);
+    if (rv) {
+        GPIO_REG(GPIO_OUTPUT_EN)    &= ~(1 << SPI_CSPIN_LCD);
+        GPIO_REG(GPIO_OUTPUT_XOR)   &= ~(1 << SPI_CSPIN_LCD);
+        GPIO_REG(GPIO_OUTPUT_VAL)   &= ~(1 << SPI_CSPIN_LCD);
+        return rv;
+    }
+
+    return EOS_OK;
+}
+
+void lcd_deselect(void) {
+    eos_spi_deselect();
+    GPIO_REG(GPIO_OUTPUT_EN)    &= ~(1 << SPI_CSPIN_LCD);
+    GPIO_REG(GPIO_OUTPUT_XOR)   &= ~(1 << SPI_CSPIN_LCD);
+    GPIO_REG(GPIO_OUTPUT_VAL)   &= ~(1 << SPI_CSPIN_LCD);
+}
+
+int eos_lcd_init(uint8_t wakeup_cause) {
+    int rst = (wakeup_cause == EOS_PWR_WAKE_RST);
+    int rv;
+
+    rv = eos_lcd_wake();
+    if (rv) return rv;
+
+    eos_gt911_init();
+    if (rst) {
+        eos_gt911_reset();
+    } else {
+        /* There is a problem with GT911 and sleep */
+        // eos_gt911_wake();
+        eos_gt911_reset();
+    }
+    return EOS_OK;
+}
+
+int eos_lcd_sleep(void) {
+    int rv;
+
+    rv = lcd_select();
+    if (rv) return rv;
+
+    eos_ili9806e_sleep();
+    lcd_deselect();
+
+    rv = lcd_disable();
+    if (rv) return rv;
+
+    /* There is a problem with GT911 and sleep */
+    // eos_gt911_sleep();
+    return EOS_OK;
+}
+
+int eos_lcd_wake(void) {
+    int rv;
+
+    rv = lcd_enable();
+    if (rv) return rv;
+
+    eos_time_sleep(200);
+
+    rv = lcd_select();
+    if (rv) {
+        lcd_disable();
+        return rv;
+    }
+
+    rv = eos_ili9806e_init();
+    if (rv == EOS_ERR_ABSENT) eve_lcd_absent();
+    lcd_deselect();
+
+    if (rv) lcd_disable();
+    return rv;
+}
diff --git a/fw/fe310/eos/dev/lcd.h b/fw/fe310/eos/dev/lcd.h
new file mode 100644
index 0000000..7ca2f7d
--- /dev/null
+++ b/fw/fe310/eos/dev/lcd.h
@@ -0,0 +1,5 @@
+#include <stdint.h>
+
+int eos_lcd_init(uint8_t wakeup_cause);
+int eos_lcd_sleep(void);
+int eos_lcd_wake(void);
-- 
cgit v1.2.3