extracted init_fpga()

BaS_GNU/BaS_GNU/sources/sysinit.c

@@ -10,9 +10,7 @@
 #include "MCF5475.h"
 #include "startcf.h"
 #include "cache.h"
-
+#include "sysinit.h"
-static const uint8_t *FPGA_FLASH_DATA = (uint8_t *) 0xe0700000L;
-static const uint8_t *FPGA_FLASH_DATA_END = (uint8_t *) 0xe0800000L;
 
 extern unsigned long _VRAM;
 extern unsigned long BaS;
@@ -22,8 +20,6 @@ extern int wait_1ms();
 extern int wait_50us();
 
 
-#define uart_out_word(a)	MCF_PSC0_PSCTB_8BIT = (a);
-
 /*
  * init SLICE TIMER 0 
  * all  = 32.538 sec = 30.736mHz
@@ -131,7 +127,7 @@ void init_serial(void)
  */
 void init_ddram(void)
 {
-	MCF_PSC0_PSCTB_8BIT = 'DDRA';
+	uart_out_word('DDRA');
 	if (!(MCF_SDRAMC_SDCR & MCF_SDRAMC_SDCR_REF)) {
 		/* Basic configuration and initialization */
 		MCF_SDRAMC_SDRAMDS = 0x000002AA;	// SDRAMDS configuration
@@ -159,9 +155,9 @@ void init_ddram(void)
 //      MCF_SDRAMC_SDCR         = 0x710F0F00;   // SDCR (lock SDMR and enable refresh)
 		MCF_SDRAMC_SDCR = 0x710D0F00;	// SDCR (lock SDMR and enable refresh)
 	}
-	MCF_PSC0_PSCTB_8BIT = 'M OK';
+	uart_out_word('M OK');
-	MCF_PSC0_PSCTB_8BIT = '!   ';
+	uart_out_word('!   ');
-	MCF_PSC0_PSCTB_8BIT = 0x0a0d;
+	uart_out_word(0x0a0d);
 }
 
 /*
@@ -169,7 +165,7 @@ void init_ddram(void)
  */
 void init_fbcs()
 {
-	MCF_PSC0_PSCTB_8BIT = 'FBCS';
+	uart_out_word('FBCS');
 
 	/* Flash */
 	MCF_FBCS0_CSAR = 0xE0000000;	// FLASH ADRESS
@@ -202,93 +198,11 @@ void init_fbcs()
 	MCF_FBCS4_CSMR = (MCF_FBCS_CSMR_BAM_1G	// 4000'0000-7FFF'FFFF
 			  | MCF_FBCS_CSMR_V);
 
-	MCF_PSC0_PSCTB_8BIT = ' OK!';
-	MCF_PSC0_PSCTB_8BIT = 0x0a0d;
-}
-
-/*
- * load FPGA
- */
-void init_fpga(void)
-{
-	register uint8_t *fpga_data;
-	register int i;
-
-	uart_out_word('FPGA');
-
-	MCF_GPIO_PODR_FEC1L &= ~(1 << 1);	/* FPGA clock => low */
-	MCF_GPIO_PODR_FEC1L &= ~(1 << 2);	/* FPGA config => low */
-
-	while (((MCF_GPIO_PPDSDR_FEC1L & (1 << 0))) || ((MCF_GPIO_PPDSDR_FEC1L & (1 << 5))));
-
-	wait_10us();
-	MCF_GPIO_PODR_FEC1L |= (1 << 2);
-	wait_10us();
-
-	while (!MCF_GPIO_PPDSDR_FEC1L & (1 << 0))
-	{
-		wait_10us();
-	}
-	
-	/*
-	 * excerpt from an Altera configuration manual:
-	 *
-	 * The low-to-high transition of nCONFIG on the FPGA begins the configuration cycle. The
-	 * configuration cycle consists of 3 stages<65>reset, configuration, and initialization.
-	 * While nCONFIG is low, the device is in reset. When the device comes out of reset,
-	 * nCONFIG must be at a logic high level in order for the device to release the open-drain
- 	 * nSTATUS pin. After nSTATUS is released, it is pulled high by a pull-up resistor and the FPGA
-	 * is ready to receive configuration data. Before and during configuration, all user I/O pins
-	 * are tri-stated. Stratix series, Arria series, and Cyclone series have weak pull-up resistors
-	 * on the I/O pins which are on, before and during configuration.
-	 *
-	 * To begin configuration, nCONFIG and nSTATUS must be at a logic high level. You can delay
-	 * configuration by holding the nCONFIG low. The device receives configuration data on its
-	 * DATA0 pins. Configuration data is latched into the FPGA on the rising edge of DCLK. After
-	 * the FPGA has received all configuration data successfully, it releases the CONF_DONE pin,
-	 * which is pulled high by a pull-up resistor. A low to high transition on CONF_DONE indicates
-	 * configuration is complete and initialization of the device can begin.
-	 */
-	fpga_data = (uint8_t *) FPGA_FLASH_DATA;
-	do
-	{
-		uint8_t value = *fpga_data++;
-		for (i = 0; i < 8; i++)
-		{
-
-			if ((value << i) & 0b10000000)
-			{
-				/* bit set -> toggle DATA0 to high */
-				MCF_GPIO_PODR_FEC1L |= (1 << 3);
-			}
-			else
-			{
-				/* bit is cleared -> toggle DATA0 to low */
-				MCF_GPIO_PODR_FEC1L &= ~(1 << 3);
-			}
-			/* toggle DCLK -> FPGA reads the bit */
-			MCF_GPIO_PODR_FEC1L |= 1;
-			MCF_GPIO_PODR_FEC1L &= ~1;
-		}
-	} while (!(MCF_GPIO_PPDSDR_FEC1L & (1 << 5)) && (fpga_data < FPGA_FLASH_DATA_END));
-
-	if (fpga_data < FPGA_FLASH_DATA_END)
-	{
-		for (i = 0; i < 4000; i++)
-		{
-			/* toggle a little more since it's fun ;) */
-			MCF_GPIO_PODR_FEC1L |= 1;
-			MCF_GPIO_PODR_FEC1L &= ~1;
-		}
-	}
-	else
-	{
-		uart_out_word(' NOT');
-	}
 	uart_out_word(' OK!');
-	uart_out_word(0x0d0a);
+	uart_out_word(0x0a0d);
 }
 
+
 void wait_pll(void)
 {
 	do {