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Merge branch 'master' of git://www.denx.de/git/u-boot-microblaze
[people/ms/u-boot.git] / drivers / fpga / zynqmppl.c
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1/*
2 * (C) Copyright 2015 - 2016, Xilinx, Inc,
3 * Michal Simek <michal.simek@xilinx.com>
4 * Siva Durga Prasad <siva.durga.paladugu@xilinx.com>
5 *
6 * SPDX-License-Identifier: GPL-2.0
7 */
8
9#include <console.h>
10#include <common.h>
11#include <zynqmppl.h>
12#include <linux/sizes.h>
13
14#define DUMMY_WORD 0xffffffff
15
16/* Xilinx binary format header */
17static const u32 bin_format[] = {
18 DUMMY_WORD, /* Dummy words */
19 DUMMY_WORD,
20 DUMMY_WORD,
21 DUMMY_WORD,
22 DUMMY_WORD,
23 DUMMY_WORD,
24 DUMMY_WORD,
25 DUMMY_WORD,
26 DUMMY_WORD,
27 DUMMY_WORD,
28 DUMMY_WORD,
29 DUMMY_WORD,
30 DUMMY_WORD,
31 DUMMY_WORD,
32 DUMMY_WORD,
33 DUMMY_WORD,
34 0x000000bb, /* Sync word */
35 0x11220044, /* Sync word */
36 DUMMY_WORD,
37 DUMMY_WORD,
38 0xaa995566, /* Sync word */
39};
40
41#define SWAP_NO 1
42#define SWAP_DONE 2
43
44/*
45 * Load the whole word from unaligned buffer
46 * Keep in your mind that it is byte loading on little-endian system
47 */
48static u32 load_word(const void *buf, u32 swap)
49{
50 u32 word = 0;
51 u8 *bitc = (u8 *)buf;
52 int p;
53
54 if (swap == SWAP_NO) {
55 for (p = 0; p < 4; p++) {
56 word <<= 8;
57 word |= bitc[p];
58 }
59 } else {
60 for (p = 3; p >= 0; p--) {
61 word <<= 8;
62 word |= bitc[p];
63 }
64 }
65
66 return word;
67}
68
69static u32 check_header(const void *buf)
70{
71 u32 i, pattern;
72 int swap = SWAP_NO;
73 u32 *test = (u32 *)buf;
74
75 debug("%s: Let's check bitstream header\n", __func__);
76
77 /* Checking that passing bin is not a bitstream */
78 for (i = 0; i < ARRAY_SIZE(bin_format); i++) {
79 pattern = load_word(&test[i], swap);
80
81 /*
82 * Bitstreams in binary format are swapped
83 * compare to regular bistream.
84 * Do not swap dummy word but if swap is done assume
85 * that parsing buffer is binary format
86 */
87 if ((__swab32(pattern) != DUMMY_WORD) &&
88 (__swab32(pattern) == bin_format[i])) {
89 swap = SWAP_DONE;
90 debug("%s: data swapped - let's swap\n", __func__);
91 }
92
93 debug("%s: %d/%px: pattern %x/%x bin_format\n", __func__, i,
94 &test[i], pattern, bin_format[i]);
95 }
96 debug("%s: Found bitstream header at %px %s swapinng\n", __func__,
97 buf, swap == SWAP_NO ? "without" : "with");
98
99 return swap;
100}
101
102static void *check_data(u8 *buf, size_t bsize, u32 *swap)
103{
104 u32 word, p = 0; /* possition */
105
106 /* Because buf doesn't need to be aligned let's read it by chars */
107 for (p = 0; p < bsize; p++) {
108 word = load_word(&buf[p], SWAP_NO);
109 debug("%s: word %x %x/%px\n", __func__, word, p, &buf[p]);
110
111 /* Find the first bitstream dummy word */
112 if (word == DUMMY_WORD) {
113 debug("%s: Found dummy word at position %x/%px\n",
114 __func__, p, &buf[p]);
115 *swap = check_header(&buf[p]);
116 if (*swap) {
117 /* FIXME add full bitstream checking here */
118 return &buf[p];
119 }
120 }
121 /* Loop can be huge - support CTRL + C */
122 if (ctrlc())
123 return NULL;
124 }
125 return NULL;
126}
127
128static ulong zynqmp_align_dma_buffer(u32 *buf, u32 len, u32 swap)
129{
130 u32 *new_buf;
131 u32 i;
132
133 if ((ulong)buf != ALIGN((ulong)buf, ARCH_DMA_MINALIGN)) {
134 new_buf = (u32 *)ALIGN((ulong)buf, ARCH_DMA_MINALIGN);
135
136 /*
137 * This might be dangerous but permits to flash if
138 * ARCH_DMA_MINALIGN is greater than header size
139 */
140 if (new_buf > (u32 *)buf) {
141 debug("%s: Aligned buffer is after buffer start\n",
142 __func__);
143 new_buf -= ARCH_DMA_MINALIGN;
144 }
145 printf("%s: Align buffer at %px to %px(swap %d)\n", __func__,
146 buf, new_buf, swap);
147
148 for (i = 0; i < (len/4); i++)
149 new_buf[i] = load_word(&buf[i], swap);
150
151 buf = new_buf;
152 } else if (swap != SWAP_DONE) {
153 /* For bitstream which are aligned */
154 u32 *new_buf = (u32 *)buf;
155
156 printf("%s: Bitstream is not swapped(%d) - swap it\n", __func__,
157 swap);
158
159 for (i = 0; i < (len/4); i++)
160 new_buf[i] = load_word(&buf[i], swap);
161 }
162
163 return (ulong)buf;
164}
165
166static int zynqmp_validate_bitstream(xilinx_desc *desc, const void *buf,
167 size_t bsize, u32 blocksize, u32 *swap)
168{
169 ulong *buf_start;
170 ulong diff;
171
172 buf_start = check_data((u8 *)buf, blocksize, swap);
173
174 if (!buf_start)
175 return FPGA_FAIL;
176
177 /* Check if data is postpone from start */
178 diff = (ulong)buf_start - (ulong)buf;
179 if (diff) {
180 printf("%s: Bitstream is not validated yet (diff %lx)\n",
181 __func__, diff);
182 return FPGA_FAIL;
183 }
184
185 if ((ulong)buf < SZ_1M) {
186 printf("%s: Bitstream has to be placed up to 1MB (%px)\n",
187 __func__, buf);
188 return FPGA_FAIL;
189 }
190
191 return 0;
192}
193
194static int invoke_smc(ulong id, ulong reg0, ulong reg1, ulong reg2)
195{
196 struct pt_regs regs;
197 regs.regs[0] = id;
198 regs.regs[1] = reg0;
199 regs.regs[2] = reg1;
200 regs.regs[3] = reg2;
201
202 smc_call(&regs);
203
204 return regs.regs[0];
205}
206
207static int zynqmp_load(xilinx_desc *desc, const void *buf, size_t bsize,
208 bitstream_type bstype)
209{
210 u32 swap;
211 ulong bin_buf, flags;
212 int ret;
213
214 if (zynqmp_validate_bitstream(desc, buf, bsize, bsize, &swap))
215 return FPGA_FAIL;
216
217 bin_buf = zynqmp_align_dma_buffer((u32 *)buf, bsize, swap);
218
219 debug("%s called!\n", __func__);
220 flush_dcache_range(bin_buf, bin_buf + bsize);
221
222 if (bsize % 4)
223 bsize = bsize / 4 + 1;
224 else
225 bsize = bsize / 4;
226
227 flags = (u32)bsize | ((u64)bstype << 32);
228
229 ret = invoke_smc(ZYNQMP_SIP_SVC_PM_FPGA_LOAD, bin_buf, flags, 0);
230 if (ret)
231 debug("PL FPGA LOAD fail\n");
232
233 return ret;
234}
235
236struct xilinx_fpga_op zynqmp_op = {
237 .load = zynqmp_load,
238};