]> git.sur5r.net Git - u-boot/blob - drivers/fpga/socfpga.c
Merge branch 'master' of git://git.denx.de/u-boot-sunxi
[u-boot] / drivers / fpga / socfpga.c
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
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 */
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