reverts #7317, fixes #7458

Author: d-a-v

bootloaders/eboot/eboot.c

@@ -12,6 +12,7 @@
 #include <string.h>
 #include "flash.h"
 #include "eboot_command.h"
+#include "spi_vendors.h"
 #include <uzlib.h>
 
 extern unsigned char _gzip_dict;
@@ -114,12 +115,10 @@ int uzlib_flash_read_cb(struct uzlib_uncomp *m)
 }
 
 unsigned char gzip_dict[32768];
-uint8_t buffer2[FLASH_SECTOR_SIZE]; // no room for this on the stack
 
 int copy_raw(const uint32_t src_addr,
              const uint32_t dst_addr,
-             const uint32_t size,
-             const bool verify)
+             const uint32_t size)
 {
     // require regions to be aligned
     if ((src_addr & 0xfff) != 0 ||
@@ -159,10 +158,8 @@ int copy_raw(const uint32_t src_addr,
 	gzip = true;
     }
     while (left > 0) {
-        if (!verify) {
-           if (SPIEraseSector(daddr/buffer_size)) {
-               return 2;
-           }
+        if (SPIEraseSector(daddr/buffer_size)) {
+            return 2;
         }
         if (!gzip) {
             if (SPIRead(saddr, buffer, buffer_size)) {
@@ -182,17 +179,8 @@ int copy_raw(const uint32_t src_addr,
                 buffer[i] = 0xff;
             }
         }
-        if (verify) {
-            if (SPIRead(daddr, buffer2, buffer_size)) {
-                return 4;
-            }
-            if (memcmp(buffer, buffer2, buffer_size)) {
-                return 9;
-            }
-        } else {
-            if (SPIWrite(daddr, buffer, buffer_size)) {
-                return 4;
-            }
+        if (SPIWrite(daddr, buffer, buffer_size)) {
+            return 4;
         }
         saddr += buffer_size;
         daddr += buffer_size;
@@ -202,6 +190,29 @@ int copy_raw(const uint32_t src_addr,
     return 0;
 }
 
+//#define XMC_SUPPORT
+#ifdef XMC_SUPPORT
+// Define a few SPI0 registers we need access to
+#define ESP8266_REG(addr) *((volatile uint32_t *)(0x60000000+(addr)))
+#define SPI0CMD ESP8266_REG(0x200)
+#define SPI0CLK ESP8266_REG(0x218)
+#define SPI0C   ESP8266_REG(0x208)
+#define SPI0W0  ESP8266_REG(0x240)
+
+#define SPICMDRDID (1 << 28)
+
+/* spi_flash_get_id()
+   Returns the flash chip ID - same as the SDK function.
+   We need our own version as the SDK isn't available here.
+ */
+uint32_t __attribute__((noinline)) spi_flash_get_id() {
+  SPI0W0=0;
+  SPI0CMD=SPICMDRDID;
+  while (SPI0CMD) {}
+  return SPI0W0;
+}
+#endif // XMC_SUPPORT
+
 int main()
 {
     int res = 9;
@@ -224,20 +235,47 @@ int main()
     if (cmd.action == ACTION_COPY_RAW) {
         ets_putc('c'); ets_putc('p'); ets_putc(':');
 
+#ifdef XMC_SUPPORT
+        // save the flash access speed registers
+        uint32_t spi0clk = SPI0CLK;
+        uint32_t spi0c   = SPI0C;
+        
+        uint32_t vendor  = spi_flash_get_id() & 0x000000ff;
+        if (vendor == SPI_FLASH_VENDOR_XMC) {
+           uint32_t flashinfo=0;
+           if (SPIRead(0, &flashinfo, 4)) {
+              // failed to read the configured flash speed.
+              // Do not change anything,
+           } else {
+              // select an appropriate flash speed
+              // Register values are those used by ROM
+              switch ((flashinfo >> 24) & 0x0f) {
+                 case 0x0: // 40MHz, slow to 20
+                 case 0x1: // 26MHz, slow to 20
+                      SPI0CLK = 0x00003043;
+                      SPI0C   = 0x00EAA313;
+                      break;
+                 case 0x2: // 20MHz, no change
+                      break;
+                 case 0xf: // 80MHz, slow to 26
+                      SPI0CLK = 0x00002002;
+                      SPI0C   = 0x00EAA202;
+                      break;
+                 default:
+                      break;
+              }
+           }
+        }
+#endif // XMC_SUPPORT
         ets_wdt_disable();
-        res = copy_raw(cmd.args[0], cmd.args[1], cmd.args[2], false);
+        res = copy_raw(cmd.args[0], cmd.args[1], cmd.args[2]);
         ets_wdt_enable();
-
-        ets_putc('0'+res); ets_putc('\n');
-
-        // Verify the copy
-        ets_putc('c'); ets_putc('m'); ets_putc('p'); ets_putc(':');
-        if (res == 0) {
-            ets_wdt_disable();
-            res = copy_raw(cmd.args[0], cmd.args[1], cmd.args[2], true);
-            ets_wdt_enable();
-            }
-
+        
+#ifdef XMC_SUPPORT
+        // restore the saved flash access speed registers
+        SPI0CLK = spi0clk;
+        SPI0C   = spi0c;
+#endif        
         ets_putc('0'+res); ets_putc('\n');
         if (res == 0) {
             cmd.action = ACTION_LOAD_APP;

bootloaders/eboot/eboot.elf

@@ -52,7 +52,7 @@ static SpiOpResult PRECACHE_ATTR
 _SPICommand(volatile uint32_t spiIfNum,
             uint32_t spic,uint32_t spiu,uint32_t spiu1,uint32_t spiu2,
             uint32_t *data,uint32_t writeWords,uint32_t readWords)
-{
+{ 
   if (spiIfNum>1)
      return SPI_RESULT_ERR;
 
@@ -69,11 +69,8 @@ _SPICommand(volatile uint32_t spiIfNum,
   volatile SpiFlashChip *fchip=flashchip;
   volatile uint32_t spicmdusr=SPICMDUSR;
 
-  uint32_t saved_ps=0;
-
   if (!spiIfNum) {
-     // Only need to disable interrupts and precache when using SPI0
-     saved_ps = xt_rsil(15);
+     // Only need to precache when using SPI0
      PRECACHE_START();
      Wait_SPI_Idlep((SpiFlashChip *)fchip);
   }
@@ -119,9 +116,6 @@ _SPICommand(volatile uint32_t spiIfNum,
   SPIREG(SPI0C) = oldSPI0C;
 
   PRECACHE_END();
-  if (!spiIfNum) {
-      xt_wsr_ps(saved_ps);
-  }
   return (timeout>0 ? SPI_RESULT_OK : SPI_RESULT_TIMEOUT);
 }