From 2d238f621b57a10dd262be124e0771ba1826347a Mon Sep 17 00:00:00 2001
From: Uros Majstorovic <majstor@majstor.org>
Date: Thu, 13 Feb 2025 18:38:59 +0100
Subject: moved other drivers to drv/

---
 fw/fe310/eos/dev/drv/gt911.c | 225 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 225 insertions(+)
 create mode 100644 fw/fe310/eos/dev/drv/gt911.c

(limited to 'fw/fe310/eos/dev/drv/gt911.c')

diff --git a/fw/fe310/eos/dev/drv/gt911.c b/fw/fe310/eos/dev/drv/gt911.c
new file mode 100644
index 0000000..22b82c6
--- /dev/null
+++ b/fw/fe310/eos/dev/drv/gt911.c
@@ -0,0 +1,225 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "encoding.h"
+#include "platform.h"
+#include "board.h"
+
+#include "eos.h"
+
+#include "soc/i2c.h"
+#include "soc/timer.h"
+
+#include "gt911.h"
+
+#define CMD_SLEEP       0x05
+
+#define REG_CMD         0x8040
+#define REG_CMD2        0x8046
+
+#define REG_STATUS      0x814E
+#define REG_POINTS      0x814F
+
+#define REG_CFG         0x8047
+#define REG_CHKSUM      0x80FF
+
+#define REG_MOD_SW1     0x804D
+#define REG_REF_RATE    0x8056
+#define REG_X_THR       0x8057
+#define REG_Y_THR       0x8058
+
+#define REG_PROD_ID     0x8140
+#define REG_FW_VER      0x8144
+
+static int g911_command(uint8_t command) {
+    int rv;
+
+    if (command > 0x07) {
+        rv = eos_i2c_write16(GT911_ADDR, REG_CMD2, &command, 1);
+        if (rv) return rv;
+    }
+
+    rv = eos_i2c_write16(GT911_ADDR, REG_CMD, &command, 1);
+    if (rv) return rv;
+
+    return EOS_OK;
+}
+
+static uint8_t gt911_chksum(uint8_t *buf,  uint8_t len) {
+    int i;
+    uint8_t csum = 0;
+
+    for(i=0; i<len; i++) {
+        csum += buf[i];
+    }
+
+    // csum %= 256;
+    csum = (~csum) + 1;
+
+    return csum;
+}
+
+static int gt911_chip_id(char *buf) {
+    int rv;
+
+    rv = eos_i2c_read16(GT911_ADDR, REG_PROD_ID, buf, 4);
+    return rv;
+}
+
+static int gt911_fw_ver(char *buf) {
+    int rv;
+
+    rv = eos_i2c_read16(GT911_ADDR, REG_FW_VER, buf, 2);
+    return rv;
+}
+
+void eos_gt911_reset(void) {
+    /* INT and RST output and low */
+    GPIO_REG(GPIO_OUTPUT_VAL)   &= ~((1 << CTP_PIN_INT) | (1 << CTP_PIN_RST));
+    GPIO_REG(GPIO_OUTPUT_EN)    |=  ((1 << CTP_PIN_INT) | (1 << CTP_PIN_RST));
+
+    /* T2: > 10ms */
+    eos_sleep(12);
+
+    /* high: 0x28/0x29 (0x14 7bit), low: 0xBA/0xBB (0x5D 7bit) */
+    if (GT911_ADDR == 0x14) {
+        GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << CTP_PIN_INT);
+    }
+
+    /* T3: > 100us */
+    eos_sleep(1);
+    GPIO_REG(GPIO_OUTPUT_EN)    &= ~(1 << CTP_PIN_RST);
+
+    /* T4: > 5ms */
+    eos_sleep(6);
+    GPIO_REG(GPIO_OUTPUT_VAL)   &= ~(1 << CTP_PIN_INT);
+    /* end select I2C slave addr */
+
+    /* T5: > 50ms */
+    eos_sleep(51);
+
+    /* set INT as input */
+    GPIO_REG(GPIO_OUTPUT_EN)    &= ~(1 << CTP_PIN_INT);
+}
+
+int eos_gt911_sleep(void) {
+    int rv;
+
+    GPIO_REG(GPIO_OUTPUT_VAL)   &= ~(1 << CTP_PIN_INT);
+    GPIO_REG(GPIO_OUTPUT_EN)    |=  (1 << CTP_PIN_INT);
+
+    rv = g911_command(CMD_SLEEP);
+    if (rv) return rv;
+
+    return EOS_OK;
+}
+
+void eos_gt911_wake(void) {
+    GPIO_REG(GPIO_OUTPUT_VAL)   |=  (1 << CTP_PIN_INT);
+    GPIO_REG(GPIO_OUTPUT_EN)    |=  (1 << CTP_PIN_INT);
+
+    eos_sleep(5);
+
+    GPIO_REG(GPIO_OUTPUT_EN)    &= ~(1 << CTP_PIN_INT);
+    GPIO_REG(GPIO_OUTPUT_VAL)   &= ~(1 << CTP_PIN_INT);
+}
+
+int eos_gt911_cfg_read(uint8_t *cfg_buf) {
+    int rv;
+
+    rv = eos_i2c_read16(GT911_ADDR, REG_CFG, cfg_buf, GT911_SIZE_CFG);
+    return rv;
+}
+
+int eos_gt911_cfg_write(uint8_t *cfg_buf) {
+    int rv;
+
+    cfg_buf[GT911_SIZE_CFG - 2] = gt911_chksum(cfg_buf, GT911_SIZE_CFG - 2);
+    cfg_buf[GT911_SIZE_CFG - 1] = 1;
+
+    rv = eos_i2c_write16(GT911_ADDR, REG_CFG, cfg_buf, GT911_SIZE_CFG);
+    return rv;
+}
+
+int eos_gt911_cfg_print(void) {
+    int i, rv;
+    uint8_t cfg_buf[GT911_SIZE_CFG];
+
+    rv = eos_gt911_cfg_read(cfg_buf);
+    if (rv) return rv;
+
+    printf("GT911 CFG:\n");
+    for (i=0; i<GT911_SIZE_CFG-2; i++) {
+        printf("%.2X", cfg_buf[i]);
+        if (i % 8 == 7) {
+            printf("\n");
+        } else {
+            printf(" ");
+        }
+    }
+
+    rv = gt911_fw_ver(cfg_buf);
+    if (rv) return rv;
+
+    printf("GT911 FW VER:%.2X%.2X\n", cfg_buf[1], cfg_buf[0]);
+
+    return EOS_OK;
+}
+
+void eos_gt911_set_reg(uint8_t *cfg_buf, uint16_t reg, uint8_t val) {
+    cfg_buf[reg - REG_CFG] = val;
+}
+
+uint8_t eos_gt911_get_reg(uint8_t *cfg_buf, uint16_t reg) {
+    return cfg_buf[reg - REG_CFG];
+}
+
+int eos_gt911_configure(void) {
+    int rv;
+    uint8_t cfg_buf[GT911_SIZE_CFG];
+    uint8_t reg;
+
+    rv = eos_gt911_cfg_read(cfg_buf);
+    if (rv) return rv;
+
+    /* XY coordinate output threshold: 1 */
+    eos_gt911_set_reg(cfg_buf, REG_X_THR, 1);
+    eos_gt911_set_reg(cfg_buf, REG_Y_THR, 1);
+
+    /* INT triggering mechanism: falling edge */
+    reg = eos_gt911_get_reg(cfg_buf, REG_MOD_SW1);
+    reg &= 0xFC;
+    reg |= 1;
+    eos_gt911_set_reg(cfg_buf, REG_MOD_SW1, reg);
+
+    /* Coordinates report rate: 5 ms */
+    reg = eos_gt911_get_reg(cfg_buf, REG_REF_RATE);
+    reg &= 0xF0;
+    eos_gt911_set_reg(cfg_buf, REG_REF_RATE, reg);
+
+    rv = eos_gt911_cfg_write(cfg_buf);
+    return rv;
+}
+
+int eos_gt911_set_status(uint8_t status) {
+    int rv;
+
+    rv = eos_i2c_write16(GT911_ADDR, REG_STATUS, &status, 1);
+    return rv;
+}
+
+int eos_gt911_get_status(uint8_t *status) {
+    int rv;
+
+    rv = eos_i2c_read16(GT911_ADDR, REG_STATUS, status, 1);
+    return rv;
+}
+
+int eos_gt911_get_points(int num_points, uint8_t *points) {
+    int rv;
+
+    rv = eos_i2c_read16(GT911_ADDR, REG_POINTS, points, GT911_SIZE_PBUF * num_points);
+    return rv;
+}
-- 
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