u-boot/drivers/fpga/socfpga.c
Tien Fong Chee 6867e19a43 arm: socfpga: Restructure FPGA driver in the preparation to support A10
Move FPGA driver which is Gen5 specific code into Gen5 driver file
and keeping common FPGA driver intact. All the changes are still keeping
in driver/fpga/ and no functional change. Subsequent patch would move
FPGA manager driver from arch/arm into driver/fpga/.

Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
Reviewed-by: Ley Foon Tan <ley.foon.tan@intel.com>
Reviewed-by: Dinh Nguyen <dinguyen@kernel.org>
2017-07-26 10:31:44 +02:00

73 lines
1.7 KiB
C

/*
* Copyright (C) 2012 Altera Corporation <www.altera.com>
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <common.h>
#include <asm/io.h>
#include <linux/errno.h>
#include <asm/arch/fpga_manager.h>
#include <asm/arch/reset_manager.h>
#include <asm/arch/system_manager.h>
DECLARE_GLOBAL_DATA_PTR;
/* Timeout count */
#define FPGA_TIMEOUT_CNT 0x1000000
static struct socfpga_fpga_manager *fpgamgr_regs =
(struct socfpga_fpga_manager *)SOCFPGA_FPGAMGRREGS_ADDRESS;
int fpgamgr_dclkcnt_set(unsigned long cnt)
{
unsigned long i;
/* Clear any existing done status */
if (readl(&fpgamgr_regs->dclkstat))
writel(0x1, &fpgamgr_regs->dclkstat);
/* Write the dclkcnt */
writel(cnt, &fpgamgr_regs->dclkcnt);
/* Wait till the dclkcnt done */
for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
if (!readl(&fpgamgr_regs->dclkstat))
continue;
writel(0x1, &fpgamgr_regs->dclkstat);
return 0;
}
return -ETIMEDOUT;
}
/* Write the RBF data to FPGA Manager */
void fpgamgr_program_write(const void *rbf_data, size_t rbf_size)
{
uint32_t src = (uint32_t)rbf_data;
uint32_t dst = SOCFPGA_FPGAMGRDATA_ADDRESS;
/* Number of loops for 32-byte long copying. */
uint32_t loops32 = rbf_size / 32;
/* Number of loops for 4-byte long copying + trailing bytes */
uint32_t loops4 = DIV_ROUND_UP(rbf_size % 32, 4);
asm volatile(
"1: ldmia %0!, {r0-r7}\n"
" stmia %1!, {r0-r7}\n"
" sub %1, #32\n"
" subs %2, #1\n"
" bne 1b\n"
" cmp %3, #0\n"
" beq 3f\n"
"2: ldr %2, [%0], #4\n"
" str %2, [%1]\n"
" subs %3, #1\n"
" bne 2b\n"
"3: nop\n"
: "+r"(src), "+r"(dst), "+r"(loops32), "+r"(loops4) :
: "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "cc");
}