From 69ed847740e3efb5c5ff6319629c93d236150959 Mon Sep 17 00:00:00 2001
From: Uros Majstorovic <majstor@majstor.org>
Date: Fri, 23 Sep 2022 20:08:02 +0200
Subject: i2s driver fixed; added uart programming;

---
 fw/fe310/phone/flash.c | 160 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 160 insertions(+)
 create mode 100644 fw/fe310/phone/flash.c

(limited to 'fw/fe310/phone/flash.c')

diff --git a/fw/fe310/phone/flash.c b/fw/fe310/phone/flash.c
new file mode 100644
index 0000000..e78576a
--- /dev/null
+++ b/fw/fe310/phone/flash.c
@@ -0,0 +1,160 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <encoding.h>
+#include <platform.h>
+
+#include <eos.h>
+
+#include <soc/timer.h>
+#include <dev/flash.h>
+#include <eve/eve.h>
+#include <eve/eve_kbd.h>
+#include <eve/eve_font.h>
+
+#include <eve/screen/window.h>
+#include <eve/screen/page.h>
+#include <eve/screen/form.h>
+
+#include "app/app.h"
+#include "app/status.h"
+
+#include "flash.h"
+
+static const uint8_t magic[] =
+    {0x2D, 0xC0, 0x3B, 0x5F, 0xEA, 0xE3, 0x1A, 0x3A, 0x83, 0x11, 0x6A, 0x33, 0x98, 0x46, 0x1C, 0x47};
+
+#define ACK         0x05
+#define NACK        0x0A
+#define BLK_SIZE    256
+
+__attribute__ ((section (".itim")))
+static uint32_t crc32x(unsigned char *buf, size_t len, uint32_t crc) {
+    int i;
+
+    crc = ~crc;
+    while (len--) {
+        crc ^= *buf++;
+        for (i=0; i<8; i++) {
+            uint32_t t = ~((crc & 1) - 1);
+            crc = (crc >> 1) ^ (0xEDB88320 & t);
+        }
+    }
+
+    return ~crc;
+}
+
+__attribute__ ((section (".itim")))
+void flash_write(void) {
+    volatile uint32_t r;
+    uint32_t crc32, crc32_b;
+    uint32_t addr;
+    uint8_t buf[BLK_SIZE + 2 * sizeof(uint32_t)];
+    int i;
+
+    clear_csr(mstatus, MSTATUS_MIE);
+    SPI0_REG(SPI_REG_FCTRL) = 0;
+    SPI0_REG(SPI_REG_FMT) &= ~SPI_FMT_DIR(SPI_DIR_TX);
+
+    do {
+        for (i=0; i<sizeof(buf); i++) {
+            while ((r = UART0_REG(UART_REG_RXFIFO)) & 0x80000000);
+            buf[i] = r;
+        }
+
+        addr = 0;
+        addr |= (uint32_t)buf[0] << 24;
+        addr |= (uint32_t)buf[1] << 16;
+        addr |= (uint32_t)buf[2] << 8;
+        addr |= (uint32_t)buf[3];
+
+        crc32_b = 0;
+        crc32_b |= (uint32_t)buf[BLK_SIZE + 4] << 24;
+        crc32_b |= (uint32_t)buf[BLK_SIZE + 5] << 16;
+        crc32_b |= (uint32_t)buf[BLK_SIZE + 6] << 8;
+        crc32_b |= (uint32_t)buf[BLK_SIZE + 7];
+        crc32 = crc32x(buf, BLK_SIZE + sizeof(uint32_t), 0xffffffff);
+        if (crc32 != crc32_b) {
+            *buf = NACK;
+            goto write_rep;
+        }
+
+        if (addr != -1) {
+            if (addr % 4096 == 0) {
+                eos_flash_wren();
+                eos_flash_ser(addr);
+                eos_flash_wip();
+            }
+            eos_flash_wren();
+            eos_flash_pp(addr, buf + sizeof(uint32_t));
+            eos_flash_wip();
+        }
+        *buf = ACK;
+write_rep:
+        while (UART0_REG(UART_REG_TXFIFO) & 0x80000000);
+        UART0_REG(UART_REG_TXFIFO) = *buf;
+    } while (addr != -1);
+
+    while(1);
+}
+
+void flash_write_init(void) {
+    volatile uint32_t r;
+    uint8_t buf[sizeof(magic)];
+    int i;
+
+    while (!(UART0_REG(UART_REG_RXFIFO) & 0x80000000));
+    app_status_set_msg("READY!");
+    eve_window_root_draw(app_root());
+
+    for (i=0; i<sizeof(magic); i++) {
+        while ((r = UART0_REG(UART_REG_RXFIFO)) & 0x80000000);
+        buf[i] = r;
+    }
+    if (memcmp(buf, magic, sizeof(magic)) == 0) {
+        *buf = ACK;
+        app_status_set_msg("FLASH START");
+    } else {
+        *buf = NACK;
+        app_status_set_msg("FLASH FAIL");
+    }
+    eve_window_root_draw(app_root());
+
+    while (UART0_REG(UART_REG_TXFIFO) & 0x80000000);
+    UART0_REG(UART_REG_TXFIFO) = *buf;
+}
+
+int flash_app(EVEWindow *window, EVEViewStack *stack) {
+    EVEFormSpec spec[] = {
+        APP_SPACERW(1,1),
+    };
+    EVEPage *page = eve_form_create(window, stack, spec, APP_SPEC_SIZE(spec), flash_uievt, flash_close);
+    if (page == NULL) return EVE_ERR_NOMEM;
+
+    return EVE_OK;
+}
+
+int flash_uievt(EVEPage *page, uint16_t evt, void *param) {
+    int ret = 0;
+
+    switch (evt) {
+        case EVE_UIEVT_GEST_TOUCH: {
+            flash_write_init();
+            flash_write();
+            break;
+        }
+
+        default: {
+            ret = eve_form_uievt(page, evt, param);
+            break;
+        }
+    }
+
+    return ret;
+}
+
+void flash_close(EVEPage *page) {
+    eve_form_destroy(page);
+}
-- 
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