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+/*
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+ * (C) Copyright 2012-2013, Xilinx, Michal Simek
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+ *
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+ * (C) Copyright 2012
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+ * Joe Hershberger <joe.hershberger@ni.com>
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+ *
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+ * See file CREDITS for list of people who contributed to this
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+ * project.
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License as
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+ * published by the Free Software Foundation; either version 2 of
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+ * the License, or (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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+ * MA 02111-1307 USA
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+ */
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+
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+#include <common.h>
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+#include <asm/io.h>
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+#include <zynqpl.h>
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+#include <asm/arch/hardware.h>
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+#include <asm/arch/sys_proto.h>
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+
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+#define DEVCFG_CTRL_PCFG_PROG_B 0x40000000
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+#define DEVCFG_ISR_FATAL_ERROR_MASK 0x00740040
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+#define DEVCFG_ISR_ERROR_FLAGS_MASK 0x00340840
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+#define DEVCFG_ISR_RX_FIFO_OV 0x00040000
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+#define DEVCFG_ISR_DMA_DONE 0x00002000
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+#define DEVCFG_ISR_PCFG_DONE 0x00000004
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+#define DEVCFG_STATUS_DMA_CMD_Q_F 0x80000000
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+#define DEVCFG_STATUS_DMA_CMD_Q_E 0x40000000
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+#define DEVCFG_STATUS_DMA_DONE_CNT_MASK 0x30000000
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+#define DEVCFG_STATUS_PCFG_INIT 0x00000010
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+#define DEVCFG_MCTRL_RFIFO_FLUSH 0x00000002
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+#define DEVCFG_MCTRL_WFIFO_FLUSH 0x00000001
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+
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+#ifndef CONFIG_SYS_FPGA_WAIT
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+#define CONFIG_SYS_FPGA_WAIT CONFIG_SYS_HZ/100 /* 10 ms */
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+#endif
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+
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+#ifndef CONFIG_SYS_FPGA_PROG_TIME
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+#define CONFIG_SYS_FPGA_PROG_TIME CONFIG_SYS_HZ /* 1 s */
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+#endif
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+
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+int zynq_info(Xilinx_desc *desc)
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+{
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+ return FPGA_SUCCESS;
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+}
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+
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+#define DUMMY_WORD 0xffffffff
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+
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+/* Xilinx binary format header */
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+static const u32 bin_format[] = {
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+ DUMMY_WORD, /* Dummy words */
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+ DUMMY_WORD,
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+ DUMMY_WORD,
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+ DUMMY_WORD,
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+ DUMMY_WORD,
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+ DUMMY_WORD,
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+ DUMMY_WORD,
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+ DUMMY_WORD,
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+ 0x000000bb, /* Sync word */
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+ 0x11220044, /* Sync word */
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+ DUMMY_WORD,
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+ DUMMY_WORD,
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+ 0xaa995566, /* Sync word */
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+};
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+
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+#define SWAP_NO 1
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+#define SWAP_DONE 2
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+
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+/*
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+ * Load the whole word from unaligned buffer
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+ * Keep in your mind that it is byte loading on little-endian system
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+ */
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+static u32 load_word(const void *buf, u32 swap)
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+{
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+ u32 word = 0;
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+ u8 *bitc = (u8 *)buf;
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+ int p;
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+
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+ if (swap == SWAP_NO) {
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+ for (p = 0; p < 4; p++) {
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+ word <<= 8;
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+ word |= bitc[p];
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+ }
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+ } else {
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+ for (p = 3; p >= 0; p--) {
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+ word <<= 8;
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+ word |= bitc[p];
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+ }
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+ }
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+
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+ return word;
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+}
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+
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+static u32 check_header(const void *buf)
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+{
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+ u32 i, pattern;
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+ int swap = SWAP_NO;
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+ u32 *test = (u32 *)buf;
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+
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+ debug("%s: Let's check bitstream header\n", __func__);
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+
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+ /* Checking that passing bin is not a bitstream */
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+ for (i = 0; i < ARRAY_SIZE(bin_format); i++) {
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+ pattern = load_word(&test[i], swap);
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+
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+ /*
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+ * Bitstreams in binary format are swapped
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+ * compare to regular bistream.
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+ * Do not swap dummy word but if swap is done assume
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+ * that parsing buffer is binary format
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+ */
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+ if ((__swab32(pattern) != DUMMY_WORD) &&
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+ (__swab32(pattern) == bin_format[i])) {
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+ pattern = __swab32(pattern);
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+ swap = SWAP_DONE;
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+ debug("%s: data swapped - let's swap\n", __func__);
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+ }
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+
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+ debug("%s: %d/%x: pattern %x/%x bin_format\n", __func__, i,
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+ (u32)&test[i], pattern, bin_format[i]);
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+ if (pattern != bin_format[i]) {
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+ debug("%s: Bitstream is not recognized\n", __func__);
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+ return 0;
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+ }
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+ }
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+ debug("%s: Found bitstream header at %x %s swapinng\n", __func__,
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+ (u32)buf, swap == SWAP_NO ? "without" : "with");
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+
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+ return swap;
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+}
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+
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+static void *check_data(u8 *buf, size_t bsize, u32 *swap)
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+{
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+ u32 word, p = 0; /* possition */
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+
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+ /* Because buf doesn't need to be aligned let's read it by chars */
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+ for (p = 0; p < bsize; p++) {
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+ word = load_word(&buf[p], SWAP_NO);
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+ debug("%s: word %x %x/%x\n", __func__, word, p, (u32)&buf[p]);
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+
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+ /* Find the first bitstream dummy word */
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+ if (word == DUMMY_WORD) {
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+ debug("%s: Found dummy word at position %x/%x\n",
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+ __func__, p, (u32)&buf[p]);
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+ *swap = check_header(&buf[p]);
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+ if (*swap) {
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+ /* FIXME add full bitstream checking here */
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+ return &buf[p];
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+ }
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+ }
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+ /* Loop can be huge - support CTRL + C */
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+ if (ctrlc())
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+ return 0;
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+ }
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+ return 0;
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+}
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+
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+
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+int zynq_load(Xilinx_desc *desc, const void *buf, size_t bsize)
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+{
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+ unsigned long ts; /* Timestamp */
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+ u32 partialbit = 0;
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+ u32 i, control, isr_status, status, swap, diff;
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+ u32 *buf_start;
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+
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+ /* Detect if we are going working with partial or full bitstream */
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+ if (bsize != desc->size) {
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+ printf("%s: Working with partial bitstream\n", __func__);
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+ partialbit = 1;
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+ }
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+
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+ buf_start = check_data((u8 *)buf, bsize, &swap);
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+ if (!buf_start)
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+ return FPGA_FAIL;
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+
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+ /* Check if data is postpone from start */
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+ diff = (u32)buf_start - (u32)buf;
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+ if (diff) {
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+ printf("%s: Bitstream is not validated yet (diff %x)\n",
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+ __func__, diff);
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+ return FPGA_FAIL;
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+ }
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+
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+ if ((u32)buf_start & 0x3) {
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+ u32 *new_buf = (u32 *)((u32)buf & ~0x3);
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+
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+ printf("%s: Align buffer at %x to %x(swap %d)\n", __func__,
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+ (u32)buf_start, (u32)new_buf, swap);
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+
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+ for (i = 0; i < (bsize/4); i++)
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+ new_buf[i] = load_word(&buf_start[i], swap);
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+
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+ swap = SWAP_DONE;
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+ buf = new_buf;
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+ } else if (swap != SWAP_DONE) {
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+ /* For bitstream which are aligned */
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+ u32 *new_buf = (u32 *)buf;
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+
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+ printf("%s: Bitstream is not swapped(%d) - swap it\n", __func__,
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+ swap);
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+
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+ for (i = 0; i < (bsize/4); i++)
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+ new_buf[i] = load_word(&buf_start[i], swap);
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+
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+ swap = SWAP_DONE;
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+ }
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+
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+ if (!partialbit) {
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+ zynq_slcr_devcfg_disable();
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+
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+ /* Setting PCFG_PROG_B signal to high */
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+ control = readl(&devcfg_base->ctrl);
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+ writel(control | DEVCFG_CTRL_PCFG_PROG_B, &devcfg_base->ctrl);
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+ /* Setting PCFG_PROG_B signal to low */
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+ writel(control & ~DEVCFG_CTRL_PCFG_PROG_B, &devcfg_base->ctrl);
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+
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+ /* Polling the PCAP_INIT status for Reset */
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+ ts = get_timer(0);
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+ while (readl(&devcfg_base->status) & DEVCFG_STATUS_PCFG_INIT) {
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+ if (get_timer(ts) > CONFIG_SYS_FPGA_WAIT) {
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+ printf("%s: Timeout wait for INIT to clear\n",
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+ __func__);
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+ return FPGA_FAIL;
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+ }
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+ }
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+
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+ /* Setting PCFG_PROG_B signal to high */
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+ writel(control | DEVCFG_CTRL_PCFG_PROG_B, &devcfg_base->ctrl);
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+
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+ /* Polling the PCAP_INIT status for Set */
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+ ts = get_timer(0);
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+ while (!(readl(&devcfg_base->status) &
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+ DEVCFG_STATUS_PCFG_INIT)) {
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+ if (get_timer(ts) > CONFIG_SYS_FPGA_WAIT) {
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+ printf("%s: Timeout wait for INIT to set\n",
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+ __func__);
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+ return FPGA_FAIL;
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+ }
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+ }
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+ }
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+
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+ isr_status = readl(&devcfg_base->int_sts);
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+
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+ /* Clear it all, so if Boot ROM comes back, it can proceed */
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+ writel(0xFFFFFFFF, &devcfg_base->int_sts);
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+
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+ if (isr_status & DEVCFG_ISR_FATAL_ERROR_MASK) {
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+ debug("%s: Fatal errors in PCAP 0x%X\n", __func__, isr_status);
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+
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+ /* If RX FIFO overflow, need to flush RX FIFO first */
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+ if (isr_status & DEVCFG_ISR_RX_FIFO_OV) {
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+ writel(DEVCFG_MCTRL_RFIFO_FLUSH, &devcfg_base->mctrl);
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+ writel(0xFFFFFFFF, &devcfg_base->int_sts);
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+ }
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+ return FPGA_FAIL;
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+ }
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+
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+ status = readl(&devcfg_base->status);
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+
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+ debug("%s: Status = 0x%08X\n", __func__, status);
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+
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+ if (status & DEVCFG_STATUS_DMA_CMD_Q_F) {
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+ debug("%s: Error: device busy\n", __func__);
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+ return FPGA_FAIL;
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+ }
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+
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+ debug("%s: Device ready\n", __func__);
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+
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+ if (!(status & DEVCFG_STATUS_DMA_CMD_Q_E)) {
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+ if (!(readl(&devcfg_base->int_sts) & DEVCFG_ISR_DMA_DONE)) {
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+ /* Error state, transfer cannot occur */
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+ debug("%s: ISR indicates error\n", __func__);
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+ return FPGA_FAIL;
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+ } else {
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+ /* Clear out the status */
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+ writel(DEVCFG_ISR_DMA_DONE, &devcfg_base->int_sts);
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+ }
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+ }
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+
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+ if (status & DEVCFG_STATUS_DMA_DONE_CNT_MASK) {
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+ /* Clear the count of completed DMA transfers */
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+ writel(DEVCFG_STATUS_DMA_DONE_CNT_MASK, &devcfg_base->status);
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+ }
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+
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+ debug("%s: Source = 0x%08X\n", __func__, (u32)buf);
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+ debug("%s: Size = %zu\n", __func__, bsize);
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+
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+ /* Set up the transfer */
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+ writel((u32)buf | 1, &devcfg_base->dma_src_addr);
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+ writel(0xFFFFFFFF, &devcfg_base->dma_dst_addr);
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+ writel(bsize >> 2, &devcfg_base->dma_src_len);
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+ writel(0, &devcfg_base->dma_dst_len);
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+
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+ isr_status = readl(&devcfg_base->int_sts);
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+
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+ /* Polling the PCAP_INIT status for Set */
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+ ts = get_timer(0);
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+ while (!(isr_status & DEVCFG_ISR_DMA_DONE)) {
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+ if (isr_status & DEVCFG_ISR_ERROR_FLAGS_MASK) {
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+ debug("%s: Error: isr = 0x%08X\n", __func__,
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+ isr_status);
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+ debug("%s: Write count = 0x%08X\n", __func__,
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+ readl(&devcfg_base->write_count));
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+ debug("%s: Read count = 0x%08X\n", __func__,
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+ readl(&devcfg_base->read_count));
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+
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+ return FPGA_FAIL;
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+ }
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+ if (get_timer(ts) > CONFIG_SYS_FPGA_PROG_TIME) {
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+ printf("%s: Timeout wait for DMA to complete\n",
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+ __func__);
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+ return FPGA_FAIL;
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+ }
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+ isr_status = readl(&devcfg_base->int_sts);
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+ }
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+
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+ debug("%s: DMA transfer is done\n", __func__);
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+
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+ /* Check FPGA configuration completion */
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+ ts = get_timer(0);
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+ while (!(isr_status & DEVCFG_ISR_PCFG_DONE)) {
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+ if (get_timer(ts) > CONFIG_SYS_FPGA_WAIT) {
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+ printf("%s: Timeout wait for FPGA to config\n",
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+ __func__);
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+ return FPGA_FAIL;
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+ }
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+ isr_status = readl(&devcfg_base->int_sts);
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+ }
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+
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+ debug("%s: FPGA config done\n", __func__);
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+
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+ /* Clear out the DMA status */
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+ writel(DEVCFG_ISR_DMA_DONE, &devcfg_base->int_sts);
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+
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+ if (!partialbit)
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+ zynq_slcr_devcfg_enable();
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+
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+ return FPGA_SUCCESS;
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+}
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+
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+int zynq_dump(Xilinx_desc *desc, const void *buf, size_t bsize)
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+{
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+ return FPGA_FAIL;
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+}
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