2 * (C) Copyright 2012-2013, Xilinx, Michal Simek
7 * SPDX-License-Identifier: GPL-2.0+
13 #include <linux/sizes.h>
14 #include <asm/arch/hardware.h>
15 #include <asm/arch/sys_proto.h>
17 #define DEVCFG_CTRL_PCFG_PROG_B 0x40000000
18 #define DEVCFG_ISR_FATAL_ERROR_MASK 0x00740040
19 #define DEVCFG_ISR_ERROR_FLAGS_MASK 0x00340840
20 #define DEVCFG_ISR_RX_FIFO_OV 0x00040000
21 #define DEVCFG_ISR_DMA_DONE 0x00002000
22 #define DEVCFG_ISR_PCFG_DONE 0x00000004
23 #define DEVCFG_STATUS_DMA_CMD_Q_F 0x80000000
24 #define DEVCFG_STATUS_DMA_CMD_Q_E 0x40000000
25 #define DEVCFG_STATUS_DMA_DONE_CNT_MASK 0x30000000
26 #define DEVCFG_STATUS_PCFG_INIT 0x00000010
27 #define DEVCFG_MCTRL_PCAP_LPBK 0x00000010
28 #define DEVCFG_MCTRL_RFIFO_FLUSH 0x00000002
29 #define DEVCFG_MCTRL_WFIFO_FLUSH 0x00000001
31 #ifndef CONFIG_SYS_FPGA_WAIT
32 #define CONFIG_SYS_FPGA_WAIT CONFIG_SYS_HZ/100 /* 10 ms */
35 #ifndef CONFIG_SYS_FPGA_PROG_TIME
36 #define CONFIG_SYS_FPGA_PROG_TIME (CONFIG_SYS_HZ * 4) /* 4 s */
39 static int zynq_info(xilinx_desc *desc)
44 #define DUMMY_WORD 0xffffffff
46 /* Xilinx binary format header */
47 static const u32 bin_format[] = {
48 DUMMY_WORD, /* Dummy words */
56 0x000000bb, /* Sync word */
57 0x11220044, /* Sync word */
60 0xaa995566, /* Sync word */
67 * Load the whole word from unaligned buffer
68 * Keep in your mind that it is byte loading on little-endian system
70 static u32 load_word(const void *buf, u32 swap)
76 if (swap == SWAP_NO) {
77 for (p = 0; p < 4; p++) {
82 for (p = 3; p >= 0; p--) {
91 static u32 check_header(const void *buf)
95 u32 *test = (u32 *)buf;
97 debug("%s: Let's check bitstream header\n", __func__);
99 /* Checking that passing bin is not a bitstream */
100 for (i = 0; i < ARRAY_SIZE(bin_format); i++) {
101 pattern = load_word(&test[i], swap);
104 * Bitstreams in binary format are swapped
105 * compare to regular bistream.
106 * Do not swap dummy word but if swap is done assume
107 * that parsing buffer is binary format
109 if ((__swab32(pattern) != DUMMY_WORD) &&
110 (__swab32(pattern) == bin_format[i])) {
111 pattern = __swab32(pattern);
113 debug("%s: data swapped - let's swap\n", __func__);
116 debug("%s: %d/%x: pattern %x/%x bin_format\n", __func__, i,
117 (u32)&test[i], pattern, bin_format[i]);
118 if (pattern != bin_format[i]) {
119 debug("%s: Bitstream is not recognized\n", __func__);
123 debug("%s: Found bitstream header at %x %s swapinng\n", __func__,
124 (u32)buf, swap == SWAP_NO ? "without" : "with");
129 static void *check_data(u8 *buf, size_t bsize, u32 *swap)
131 u32 word, p = 0; /* possition */
133 /* Because buf doesn't need to be aligned let's read it by chars */
134 for (p = 0; p < bsize; p++) {
135 word = load_word(&buf[p], SWAP_NO);
136 debug("%s: word %x %x/%x\n", __func__, word, p, (u32)&buf[p]);
138 /* Find the first bitstream dummy word */
139 if (word == DUMMY_WORD) {
140 debug("%s: Found dummy word at position %x/%x\n",
141 __func__, p, (u32)&buf[p]);
142 *swap = check_header(&buf[p]);
144 /* FIXME add full bitstream checking here */
148 /* Loop can be huge - support CTRL + C */
155 static int zynq_dma_transfer(u32 srcbuf, u32 srclen, u32 dstbuf, u32 dstlen)
160 /* Set up the transfer */
161 writel((u32)srcbuf, &devcfg_base->dma_src_addr);
162 writel(dstbuf, &devcfg_base->dma_dst_addr);
163 writel(srclen, &devcfg_base->dma_src_len);
164 writel(dstlen, &devcfg_base->dma_dst_len);
166 isr_status = readl(&devcfg_base->int_sts);
168 /* Polling the PCAP_INIT status for Set */
170 while (!(isr_status & DEVCFG_ISR_DMA_DONE)) {
171 if (isr_status & DEVCFG_ISR_ERROR_FLAGS_MASK) {
172 debug("%s: Error: isr = 0x%08X\n", __func__,
174 debug("%s: Write count = 0x%08X\n", __func__,
175 readl(&devcfg_base->write_count));
176 debug("%s: Read count = 0x%08X\n", __func__,
177 readl(&devcfg_base->read_count));
181 if (get_timer(ts) > CONFIG_SYS_FPGA_PROG_TIME) {
182 printf("%s: Timeout wait for DMA to complete\n",
186 isr_status = readl(&devcfg_base->int_sts);
189 debug("%s: DMA transfer is done\n", __func__);
191 /* Clear out the DMA status */
192 writel(DEVCFG_ISR_DMA_DONE, &devcfg_base->int_sts);
197 static int zynq_dma_xfer_init(u32 partialbit)
199 u32 status, control, isr_status;
202 /* Clear loopback bit */
203 clrbits_le32(&devcfg_base->mctrl, DEVCFG_MCTRL_PCAP_LPBK);
206 zynq_slcr_devcfg_disable();
208 /* Setting PCFG_PROG_B signal to high */
209 control = readl(&devcfg_base->ctrl);
210 writel(control | DEVCFG_CTRL_PCFG_PROG_B, &devcfg_base->ctrl);
211 /* Setting PCFG_PROG_B signal to low */
212 writel(control & ~DEVCFG_CTRL_PCFG_PROG_B, &devcfg_base->ctrl);
214 /* Polling the PCAP_INIT status for Reset */
216 while (readl(&devcfg_base->status) & DEVCFG_STATUS_PCFG_INIT) {
217 if (get_timer(ts) > CONFIG_SYS_FPGA_WAIT) {
218 printf("%s: Timeout wait for INIT to clear\n",
224 /* Setting PCFG_PROG_B signal to high */
225 writel(control | DEVCFG_CTRL_PCFG_PROG_B, &devcfg_base->ctrl);
227 /* Polling the PCAP_INIT status for Set */
229 while (!(readl(&devcfg_base->status) &
230 DEVCFG_STATUS_PCFG_INIT)) {
231 if (get_timer(ts) > CONFIG_SYS_FPGA_WAIT) {
232 printf("%s: Timeout wait for INIT to set\n",
239 isr_status = readl(&devcfg_base->int_sts);
241 /* Clear it all, so if Boot ROM comes back, it can proceed */
242 writel(0xFFFFFFFF, &devcfg_base->int_sts);
244 if (isr_status & DEVCFG_ISR_FATAL_ERROR_MASK) {
245 debug("%s: Fatal errors in PCAP 0x%X\n", __func__, isr_status);
247 /* If RX FIFO overflow, need to flush RX FIFO first */
248 if (isr_status & DEVCFG_ISR_RX_FIFO_OV) {
249 writel(DEVCFG_MCTRL_RFIFO_FLUSH, &devcfg_base->mctrl);
250 writel(0xFFFFFFFF, &devcfg_base->int_sts);
255 status = readl(&devcfg_base->status);
257 debug("%s: Status = 0x%08X\n", __func__, status);
259 if (status & DEVCFG_STATUS_DMA_CMD_Q_F) {
260 debug("%s: Error: device busy\n", __func__);
264 debug("%s: Device ready\n", __func__);
266 if (!(status & DEVCFG_STATUS_DMA_CMD_Q_E)) {
267 if (!(readl(&devcfg_base->int_sts) & DEVCFG_ISR_DMA_DONE)) {
268 /* Error state, transfer cannot occur */
269 debug("%s: ISR indicates error\n", __func__);
272 /* Clear out the status */
273 writel(DEVCFG_ISR_DMA_DONE, &devcfg_base->int_sts);
277 if (status & DEVCFG_STATUS_DMA_DONE_CNT_MASK) {
278 /* Clear the count of completed DMA transfers */
279 writel(DEVCFG_STATUS_DMA_DONE_CNT_MASK, &devcfg_base->status);
285 static u32 *zynq_align_dma_buffer(u32 *buf, u32 len, u32 swap)
290 if ((u32)buf != ALIGN((u32)buf, ARCH_DMA_MINALIGN)) {
291 new_buf = (u32 *)ALIGN((u32)buf, ARCH_DMA_MINALIGN);
294 * This might be dangerous but permits to flash if
295 * ARCH_DMA_MINALIGN is greater than header size
298 debug("%s: Aligned buffer is after buffer start\n",
300 new_buf -= ARCH_DMA_MINALIGN;
302 printf("%s: Align buffer at %x to %x(swap %d)\n", __func__,
303 (u32)buf, (u32)new_buf, swap);
305 for (i = 0; i < (len/4); i++)
306 new_buf[i] = load_word(&buf[i], swap);
309 } else if (swap != SWAP_DONE) {
310 /* For bitstream which are aligned */
311 u32 *new_buf = (u32 *)buf;
313 printf("%s: Bitstream is not swapped(%d) - swap it\n", __func__,
316 for (i = 0; i < (len/4); i++)
317 new_buf[i] = load_word(&buf[i], swap);
323 static int zynq_validate_bitstream(xilinx_desc *desc, const void *buf,
324 size_t bsize, u32 blocksize, u32 *swap,
330 /* Detect if we are going working with partial or full bitstream */
331 if (bsize != desc->size) {
332 printf("%s: Working with partial bitstream\n", __func__);
335 buf_start = check_data((u8 *)buf, blocksize, swap);
340 /* Check if data is postpone from start */
341 diff = (u32)buf_start - (u32)buf;
343 printf("%s: Bitstream is not validated yet (diff %x)\n",
348 if ((u32)buf < SZ_1M) {
349 printf("%s: Bitstream has to be placed up to 1MB (%x)\n",
354 if (zynq_dma_xfer_init(*partialbit))
361 static int zynq_load(xilinx_desc *desc, const void *buf, size_t bsize)
363 unsigned long ts; /* Timestamp */
365 u32 isr_status, swap;
368 * send bsize inplace of blocksize as it was not a bitstream
371 if (zynq_validate_bitstream(desc, buf, bsize, bsize, &swap,
375 buf = zynq_align_dma_buffer((u32 *)buf, bsize, swap);
377 debug("%s: Source = 0x%08X\n", __func__, (u32)buf);
378 debug("%s: Size = %zu\n", __func__, bsize);
380 /* flush(clean & invalidate) d-cache range buf */
381 flush_dcache_range((u32)buf, (u32)buf +
382 roundup(bsize, ARCH_DMA_MINALIGN));
384 if (zynq_dma_transfer((u32)buf | 1, bsize >> 2, 0xffffffff, 0))
387 isr_status = readl(&devcfg_base->int_sts);
388 /* Check FPGA configuration completion */
390 while (!(isr_status & DEVCFG_ISR_PCFG_DONE)) {
391 if (get_timer(ts) > CONFIG_SYS_FPGA_WAIT) {
392 printf("%s: Timeout wait for FPGA to config\n",
396 isr_status = readl(&devcfg_base->int_sts);
399 debug("%s: FPGA config done\n", __func__);
402 zynq_slcr_devcfg_enable();
407 static int zynq_dump(xilinx_desc *desc, const void *buf, size_t bsize)
412 struct xilinx_fpga_op zynq_op = {