--- /dev/null
+/***************************************************************
+ * Project:
+ * CPLD SlaveSerial Configuration via embedded microprocessor.
+ *
+ * Copyright info:
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it as you like.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Description:
+ *
+ * This is the main source file that will allow a microprocessor
+ * to configure Xilinx Virtex, Virtex-E, Virtex-EM, Virtex-II,
+ * and Spartan-II devices via the SlaveSerial Configuration Mode.
+ * This code is discussed in Xilinx Application Note, XAPP502.
+ *
+ * History:
+ * 3-October-2001 MN/MP - Created
+ * 20-August-2008 Renesas Solutions - Modified to SH7723
+ ****************************************************************/
+
+#include <common.h>
+
+/* Serial */
+#define SCIF_BASE 0xffe00000 /* SCIF0 */
+#define SCSMR (vu_short *)(SCIF_BASE + 0x00)
+#define SCBRR (vu_char *)(SCIF_BASE + 0x04)
+#define SCSCR (vu_short *)(SCIF_BASE + 0x08)
+#define SC_TDR (vu_char *)(SCIF_BASE + 0x0C)
+#define SC_SR (vu_short *)(SCIF_BASE + 0x10)
+#define SCFCR (vu_short *)(SCIF_BASE + 0x18)
+#define RFCR (vu_long *)0xFE400020
+
+#define SCSCR_INIT 0x0038
+#define SCSCR_CLR 0x0000
+#define SCFCR_INIT 0x0006
+#define SCSMR_INIT 0x0080
+#define RFCR_CLR 0xA400
+#define SCI_TD_E 0x0020
+#define SCI_TDRE_CLEAR 0x00df
+
+#define BPS_SETTING_VALUE 1 /* 12.5MHz */
+#define WAIT_RFCR_COUNTER 500
+
+/* CPLD data size */
+#define CPLD_DATA_SIZE 169216
+
+/* out */
+#define CPLD_PFC_ADR ((vu_short *)0xA4050112)
+
+#define CPLD_PROG_ADR ((vu_char *)0xA4050132)
+#define CPLD_PROG_DAT 0x80
+
+/* in */
+#define CPLD_INIT_ADR ((vu_char *)0xA4050132)
+#define CPLD_INIT_DAT 0x40
+#define CPLD_DONE_ADR ((vu_char *)0xA4050132)
+#define CPLD_DONE_DAT 0x20
+
+#define HIZCRB ((vu_short *)0xA405015A)
+
+/* data */
+#define CPLD_NOMAL_START 0xA0A80000
+#define CPLD_SAFE_START 0xA0AC0000
+#define MODE_SW (vu_char *)0xA405012A
+
+static void init_cpld_loader(void)
+{
+
+ *SCSCR = SCSCR_CLR;
+ *SCFCR = SCFCR_INIT;
+ *SCSMR = SCSMR_INIT;
+
+ *SCBRR = BPS_SETTING_VALUE;
+
+ *RFCR = RFCR_CLR; /* Refresh counter clear */
+
+ while (*RFCR < WAIT_RFCR_COUNTER)
+ ;
+
+ *SCFCR = 0x0; /* RTRG=00, TTRG=00 */
+ /* MCE=0,TFRST=0,RFRST=0,LOOP=0 */
+ *SCSCR = SCSCR_INIT;
+}
+
+static int check_write_ready(void)
+{
+ u16 status = *SC_SR;
+ return status & SCI_TD_E;
+}
+
+static void write_cpld_data(char ch)
+{
+ while (!check_write_ready())
+ ;
+
+ *SC_TDR = ch;
+ *SC_SR;
+ *SC_SR = SCI_TDRE_CLEAR;
+}
+
+static int delay(void)
+{
+ int i;
+ int c = 0;
+ for (i = 0; i < 200; i++) {
+ c = *(volatile int *)0xa0000000;
+ }
+ return c;
+}
+
+/***********************************************************************
+ *
+ * Function: slave_serial
+ *
+ * Description: Initiates SlaveSerial Configuration.
+ * Calls ShiftDataOut() to output serial data
+ *
+ ***********************************************************************/
+static void slave_serial(void)
+{
+ int i;
+ unsigned char *flash;
+
+ *CPLD_PROG_ADR |= CPLD_PROG_DAT; /* PROGRAM_OE HIGH */
+ delay();
+
+ /*
+ * Toggle Program Pin by Toggling Program_OE bit
+ * This is accomplished by writing to the Program Register in the CPLD
+ *
+ * NOTE: The Program_OE bit should be driven high to bring the Virtex
+ * Program Pin low. Likewise, it should be driven low
+ * to bring the Virtex Program Pin to High-Z
+ */
+
+ *CPLD_PROG_ADR &= ~CPLD_PROG_DAT; /* PROGRAM_OE LOW */
+ delay();
+
+ /*
+ * Bring Program High-Z
+ * (Drive Program_OE bit low to bring Virtex Program Pin to High-Z
+ */
+
+ /* Program_OE bit Low brings the Virtex Program Pin to High Z: */
+ *CPLD_PROG_ADR |= CPLD_PROG_DAT; /* PROGRAM_OE HIGH */
+
+ while ((*CPLD_INIT_ADR & CPLD_INIT_DAT) == 0)
+ delay();
+
+ /* Begin Slave-Serial Configuration */
+ flash = (unsigned char *)CPLD_NOMAL_START;
+
+ for (i = 0; i < CPLD_DATA_SIZE; i++)
+ write_cpld_data(*flash++);
+}
+
+/***********************************************************************
+ *
+ * Function: check_done_bit
+ *
+ * Description: This function takes monitors the CPLD Input Register
+ * by checking the status of the DONE bit in that Register.
+ * By doing so, it monitors the Xilinx Virtex device's DONE
+ * Pin to see if configuration bitstream has been properly
+ * loaded
+ *
+ ***********************************************************************/
+static void check_done_bit(void)
+{
+ while (!(*CPLD_DONE_ADR & CPLD_DONE_DAT))
+ ;
+}
+
+/***********************************************************************
+ *
+ * Function: init_cpld
+ *
+ * Description: Begins Slave Serial configuration of Xilinx FPGA
+ *
+ ***********************************************************************/
+void init_cpld(void)
+{
+ /* Init serial device */
+ init_cpld_loader();
+
+ if (*CPLD_DONE_ADR & CPLD_DONE_DAT) /* Already DONE */
+ return;
+
+ *HIZCRB = 0x0000;
+ *CPLD_PFC_ADR = 0x7c00; /* FPGA PROG = OUTPUT */
+
+ /* write CPLD data from NOR flash to device */
+ slave_serial();
+
+ /*
+ * Monitor the DONE bit in the CPLD Input Register to see if
+ * configuration successful
+ */
+
+ check_done_bit();
+}
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