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1 // SPDX-License-Identifier: BSD-3-Clause
2 /*
3  * Copyright (C) 2012-2017 Altera Corporation <www.altera.com>
4  * All rights reserved.
5  */
6 
7 #include <common.h>
8 #include <asm/io.h>
9 #include <linux/errno.h>
10 #include <asm/arch/fpga_manager.h>
11 #include <asm/arch/reset_manager.h>
12 #include <asm/arch/system_manager.h>
13 
14 /* Timeout count */
15 #define FPGA_TIMEOUT_CNT		0x1000000
16 
17 static struct socfpga_fpga_manager *fpgamgr_regs =
18 	(struct socfpga_fpga_manager *)SOCFPGA_FPGAMGRREGS_ADDRESS;
19 
fpgamgr_dclkcnt_set(unsigned long cnt)20 int fpgamgr_dclkcnt_set(unsigned long cnt)
21 {
22 	unsigned long i;
23 
24 	/* Clear any existing done status */
25 	if (readl(&fpgamgr_regs->dclkstat))
26 		writel(0x1, &fpgamgr_regs->dclkstat);
27 
28 	/* Write the dclkcnt */
29 	writel(cnt, &fpgamgr_regs->dclkcnt);
30 
31 	/* Wait till the dclkcnt done */
32 	for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
33 		if (!readl(&fpgamgr_regs->dclkstat))
34 			continue;
35 
36 		writel(0x1, &fpgamgr_regs->dclkstat);
37 		return 0;
38 	}
39 
40 	return -ETIMEDOUT;
41 }
42 
43 /* Write the RBF data to FPGA Manager */
fpgamgr_program_write(const void * rbf_data,size_t rbf_size)44 void fpgamgr_program_write(const void *rbf_data, size_t rbf_size)
45 {
46 	uint32_t src = (uint32_t)rbf_data;
47 	uint32_t dst = SOCFPGA_FPGAMGRDATA_ADDRESS;
48 
49 	/* Number of loops for 32-byte long copying. */
50 	uint32_t loops32 = rbf_size / 32;
51 	/* Number of loops for 4-byte long copying + trailing bytes */
52 	uint32_t loops4 = DIV_ROUND_UP(rbf_size % 32, 4);
53 
54 	asm volatile(
55 		"	cmp	%2,	#0\n"
56 		"	beq	2f\n"
57 		"1:	ldmia	%0!,	{r0-r7}\n"
58 		"	stmia	%1!,	{r0-r7}\n"
59 		"	sub	%1,	#32\n"
60 		"	subs	%2,	#1\n"
61 		"	bne	1b\n"
62 		"2:	cmp	%3,	#0\n"
63 		"	beq	4f\n"
64 		"3:	ldr	%2,	[%0],	#4\n"
65 		"	str	%2,	[%1]\n"
66 		"	subs	%3,	#1\n"
67 		"	bne	3b\n"
68 		"4:	nop\n"
69 		: "+r"(src), "+r"(dst), "+r"(loops32), "+r"(loops4) :
70 		: "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "cc");
71 }
72 
73