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