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Diffstat (limited to 'board/ap325rxa/cpld-ap325rxa.c')
| -rw-r--r-- | board/ap325rxa/cpld-ap325rxa.c | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/board/ap325rxa/cpld-ap325rxa.c b/board/ap325rxa/cpld-ap325rxa.c deleted file mode 100644 index 16fadcb..0000000 --- a/board/ap325rxa/cpld-ap325rxa.c +++ /dev/null @@ -1,206 +0,0 @@ -/*************************************************************** - * 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(); -} |