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/*
* (C) Copyright 2015 - 2016, Xilinx, Inc,
* Michal Simek <michal.simek@xilinx.com>
* Siva Durga Prasad <siva.durga.paladugu@xilinx.com>
*
* SPDX-License-Identifier: GPL-2.0
*/
#include <console.h>
#include <common.h>
#include <zynqmppl.h>
#include <linux/sizes.h>
#define DUMMY_WORD 0xffffffff
/* Xilinx binary format header */
static const u32 bin_format[] = {
DUMMY_WORD, /* Dummy words */
DUMMY_WORD,
DUMMY_WORD,
DUMMY_WORD,
DUMMY_WORD,
DUMMY_WORD,
DUMMY_WORD,
DUMMY_WORD,
DUMMY_WORD,
DUMMY_WORD,
DUMMY_WORD,
DUMMY_WORD,
DUMMY_WORD,
DUMMY_WORD,
DUMMY_WORD,
DUMMY_WORD,
0x000000bb, /* Sync word */
0x11220044, /* Sync word */
DUMMY_WORD,
DUMMY_WORD,
0xaa995566, /* Sync word */
};
#define SWAP_NO 1
#define SWAP_DONE 2
/*
* Load the whole word from unaligned buffer
* Keep in your mind that it is byte loading on little-endian system
*/
static u32 load_word(const void *buf, u32 swap)
{
u32 word = 0;
u8 *bitc = (u8 *)buf;
int p;
if (swap == SWAP_NO) {
for (p = 0; p < 4; p++) {
word <<= 8;
word |= bitc[p];
}
} else {
for (p = 3; p >= 0; p--) {
word <<= 8;
word |= bitc[p];
}
}
return word;
}
static u32 check_header(const void *buf)
{
u32 i, pattern;
int swap = SWAP_NO;
u32 *test = (u32 *)buf;
debug("%s: Let's check bitstream header\n", __func__);
/* Checking that passing bin is not a bitstream */
for (i = 0; i < ARRAY_SIZE(bin_format); i++) {
pattern = load_word(&test[i], swap);
/*
* Bitstreams in binary format are swapped
* compare to regular bistream.
* Do not swap dummy word but if swap is done assume
* that parsing buffer is binary format
*/
if ((__swab32(pattern) != DUMMY_WORD) &&
(__swab32(pattern) == bin_format[i])) {
swap = SWAP_DONE;
debug("%s: data swapped - let's swap\n", __func__);
}
debug("%s: %d/%px: pattern %x/%x bin_format\n", __func__, i,
&test[i], pattern, bin_format[i]);
}
debug("%s: Found bitstream header at %px %s swapinng\n", __func__,
buf, swap == SWAP_NO ? "without" : "with");
return swap;
}
static void *check_data(u8 *buf, size_t bsize, u32 *swap)
{
u32 word, p = 0; /* possition */
/* Because buf doesn't need to be aligned let's read it by chars */
for (p = 0; p < bsize; p++) {
word = load_word(&buf[p], SWAP_NO);
debug("%s: word %x %x/%px\n", __func__, word, p, &buf[p]);
/* Find the first bitstream dummy word */
if (word == DUMMY_WORD) {
debug("%s: Found dummy word at position %x/%px\n",
__func__, p, &buf[p]);
*swap = check_header(&buf[p]);
if (*swap) {
/* FIXME add full bitstream checking here */
return &buf[p];
}
}
/* Loop can be huge - support CTRL + C */
if (ctrlc())
return NULL;
}
return NULL;
}
static ulong zynqmp_align_dma_buffer(u32 *buf, u32 len, u32 swap)
{
u32 *new_buf;
u32 i;
if ((ulong)buf != ALIGN((ulong)buf, ARCH_DMA_MINALIGN)) {
new_buf = (u32 *)ALIGN((ulong)buf, ARCH_DMA_MINALIGN);
/*
* This might be dangerous but permits to flash if
* ARCH_DMA_MINALIGN is greater than header size
*/
if (new_buf > (u32 *)buf) {
debug("%s: Aligned buffer is after buffer start\n",
__func__);
new_buf -= ARCH_DMA_MINALIGN;
}
printf("%s: Align buffer at %px to %px(swap %d)\n", __func__,
buf, new_buf, swap);
for (i = 0; i < (len/4); i++)
new_buf[i] = load_word(&buf[i], swap);
buf = new_buf;
} else if (swap != SWAP_DONE) {
/* For bitstream which are aligned */
u32 *new_buf = (u32 *)buf;
printf("%s: Bitstream is not swapped(%d) - swap it\n", __func__,
swap);
for (i = 0; i < (len/4); i++)
new_buf[i] = load_word(&buf[i], swap);
}
return (ulong)buf;
}
static int zynqmp_validate_bitstream(xilinx_desc *desc, const void *buf,
size_t bsize, u32 blocksize, u32 *swap)
{
ulong *buf_start;
ulong diff;
buf_start = check_data((u8 *)buf, blocksize, swap);
if (!buf_start)
return FPGA_FAIL;
/* Check if data is postpone from start */
diff = (ulong)buf_start - (ulong)buf;
if (diff) {
printf("%s: Bitstream is not validated yet (diff %lx)\n",
__func__, diff);
return FPGA_FAIL;
}
if ((ulong)buf < SZ_1M) {
printf("%s: Bitstream has to be placed up to 1MB (%px)\n",
__func__, buf);
return FPGA_FAIL;
}
return 0;
}
static int invoke_smc(ulong id, ulong reg0, ulong reg1, ulong reg2)
{
struct pt_regs regs;
regs.regs[0] = id;
regs.regs[1] = reg0;
regs.regs[2] = reg1;
regs.regs[3] = reg2;
smc_call(®s);
return regs.regs[0];
}
static int zynqmp_load(xilinx_desc *desc, const void *buf, size_t bsize,
bitstream_type bstype)
{
u32 swap;
ulong bin_buf, flags;
int ret;
if (zynqmp_validate_bitstream(desc, buf, bsize, bsize, &swap))
return FPGA_FAIL;
bin_buf = zynqmp_align_dma_buffer((u32 *)buf, bsize, swap);
debug("%s called!\n", __func__);
flush_dcache_range(bin_buf, bin_buf + bsize);
if (bsize % 4)
bsize = bsize / 4 + 1;
else
bsize = bsize / 4;
flags = (u32)bsize | ((u64)bstype << 32);
ret = invoke_smc(ZYNQMP_SIP_SVC_PM_FPGA_LOAD, bin_buf, flags, 0);
if (ret)
debug("PL FPGA LOAD fail\n");
return ret;
}
struct xilinx_fpga_op zynqmp_op = {
.load = zynqmp_load,
};
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