added several new USB commands: remote reset, API version and read/write volatile flash environment

git-svn-id: https://svn.openpcd.org:2342/trunk@295 6dc7ffe9-61d6-0310-9af1-9938baff3ed1

2 files changed, 90 insertions, 9 deletions

diff --git a/firmware/src/os/usbcmd_generic.c b/firmware/src/os/usbcmd_generic.c
index c26daf7..77b992f 100644
--- a/firmware/src/os/usbcmd_generic.c
+++ b/firmware/src/os/usbcmd_generic.c
@@ -10,27 +10,98 @@
 #include <os/led.h>
 #include <os/dbgu.h>
 #include <os/main.h>
+#include <os/flash.h>
+#include <board.h>
+#ifdef  PCD
+#include <rc632_highlevel.h>
+#endif/*PCD*/
+
+#define OPENPCD_API_VERSION (0x01)
+#define CONFIG_AREA_ADDR ((void*)(AT91C_IFLASH + AT91C_IFLASH_SIZE - ENVIRONMENT_SIZE))
+#define CONFIG_AREA_WORDS ( AT91C_IFLASH_PAGE_SIZE/sizeof(u_int32_t) )
+
+volatile u_int32_t config_stack[ CONFIG_AREA_WORDS ];
+
+static int gen_setenv(const void* buffer,int len)
+{
+    volatile unsigned int i;
+    u_int32_t *dst;
+
+    if( len >= sizeof(config_stack) )
+	len=sizeof(config_stack);
+	
+    memcpy(&config_stack,buffer,len);
+    
+    /* retrieve current content to allow partial flashing */    
+    
+    /* flash changes */
+    dst=(u_int32_t*)CONFIG_AREA_ADDR;
+    for(i=0;i<CONFIG_AREA_WORDS;i++)
+	*dst++=config_stack[i];
+
+    flash_page(CONFIG_AREA_ADDR);
+	
+    return len;
+}
+
+static int gen_getenv(void* buffer,int len)
+{
+    if( len >= sizeof(config_stack) )
+	len=sizeof(config_stack);
+
+    memcpy(buffer,&config_stack,len);
+
+    return len;
+}
 
 static int gen_usb_rx(struct req_ctx *rctx)
 {
 	struct openpcd_hdr *poh = (struct openpcd_hdr *) rctx->data;
-	struct openpcd_compile_version *ver = 
-			(struct openpcd_compile_version *) poh->data;
-	int ret = 1;
+	struct openpcd_compile_version *ver =
+	    (struct openpcd_compile_version *)poh->data; 
+	u_int32_t len = rctx->tot_len-sizeof(*poh);
 
-	rctx->tot_len = sizeof(*poh);
+        /* initialize transmit length to header length */
+        rctx->tot_len = sizeof(*poh);
 
 	switch (poh->cmd) {
+
+	case OPENPCD_CMD_GET_API_VERSION:
+		DEBUGP("CMD_GET_API_VERSION\n");
+		poh->flags &= OPENPCD_FLAG_RESPOND;
+		poh->val = OPENPCD_API_VERSION;
+		break;
+		
+	case OPENPCD_CMD_GET_ENVIRONMENT:
+		poh->flags &= OPENPCD_FLAG_RESPOND;
+		poh->val = gen_getenv(&poh->data,poh->val);
+		rctx->tot_len += poh->val;
+		DEBUGP("CMD_GET_ENVIRONMENT(res_len=%u)\n", poh->val);
+		break;
+		
+	case OPENPCD_CMD_SET_ENVIRONMENT:
+		DEBUGP("CMD_SET_ENVIRONMENT (in_len=%u)\n", len);
+		gen_setenv(&poh->data,len);
+		break;
+		
+	case OPENPCD_CMD_RESET:
+		DEBUGP("CMD_RESET\n");
+		AT91F_RSTSoftReset(AT91C_BASE_RSTC, AT91C_RSTC_PROCRST|
+				   AT91C_RSTC_PERRST|AT91C_RSTC_EXTRST);
+		break;
+
 	case OPENPCD_CMD_GET_VERSION:
-		DEBUGP("GET_VERSION ");
+		DEBUGP("GET_VERSION\n");
+		poh->flags |= OPENPCD_FLAG_RESPOND;
 		memcpy(ver, &opcd_version, sizeof(*ver));
 		rctx->tot_len += sizeof(*ver);
-		poh->flags |= OPENPCD_FLAG_RESPOND;
 		break;
+
 	case OPENPCD_CMD_SET_LED:
-		DEBUGP("SET LED(%u,%u) ", poh->reg, poh->val);
+		DEBUGP("SET LED(%u,%u)\n", poh->reg, poh->val);
 		led_switch(poh->reg, poh->val);
 		break;
+
 	case OPENPCD_CMD_GET_SERIAL:
 		DEBUGP("GET SERIAL(");
 		poh->flags |= OPENPCD_FLAG_RESPOND;
@@ -41,14 +112,15 @@ static int gen_usb_rx(struct req_ctx *rctx)
 			return USB_ERR(USB_ERR_CMD_NOT_IMPL);
 		}
 
-		DEBUGP("%s) ", hexdump(poh->data, 4));
+		DEBUGP("%s)\n", hexdump(poh->data, 4));
 #else
 		/* FIXME: where to get serial in PICC case */
 		return USB_ERR(USB_ERR_CMD_NOT_IMPL);
 #endif
 		break;
+
 	default:
-		DEBUGP("UNKNOWN ");
+		DEBUGP("UNKNOWN\n");
 		return USB_ERR(USB_ERR_CMD_UNKNOWN);
 		break;
 	}
@@ -60,6 +132,13 @@ static int gen_usb_rx(struct req_ctx *rctx)
 
 void usbcmd_gen_init(void)
 {
+	DEBUGP("Inititalizing usbcmd_gen_init\n");
+	/* setup FLASH write support for environment storage */
+	flash_init();
+	
+	/* retrieve default data from flash */
+	memcpy(&config_stack,CONFIG_AREA_ADDR,sizeof(config_stack));
+	
 	usb_hdlr_register(&gen_usb_rx, OPENPCD_CMD_CLS_GENERIC);
 }
 
diff --git a/firmware/src/os/usbcmd_generic.h b/firmware/src/os/usbcmd_generic.h
index 0a7b8b7..4dd0456 100644
--- a/firmware/src/os/usbcmd_generic.h
+++ b/firmware/src/os/usbcmd_generic.h
@@ -1,4 +1,6 @@
 #ifndef _USBAPI_GENERIC_H
 #define _USBAPI_GENERIC_H
 extern void usbcmd_gen_init(void);
+extern int gen_setenv(void* data,u_int32_t pos,u_int32_t length);
+extern int gen_getenv(void* data,u_int32_t pos,u_int32_t length);
 #endif