You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
154 lines
3.8 KiB
154 lines
3.8 KiB
/*
|
|
* Copyright (c) 2015-2020, Renesas Electronics Corporation. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
#include <arch_helpers.h>
|
|
#include <common/debug.h>
|
|
#include <lib/mmio.h>
|
|
|
|
#include "cpg_registers.h"
|
|
#include "rcar_def.h"
|
|
#include "rcar_private.h"
|
|
|
|
/* DMA CHANNEL setting (0/16/32) */
|
|
#if RCAR_LSI == RCAR_V3M
|
|
#define DMA_CH 16
|
|
#else
|
|
#define DMA_CH 0
|
|
#endif
|
|
|
|
#if (DMA_CH == 0)
|
|
#define SYS_DMAC_BIT ((uint32_t)1U << 19U)
|
|
#define DMA_BASE (0xE6700000U)
|
|
#elif (DMA_CH == 16)
|
|
#define SYS_DMAC_BIT ((uint32_t)1U << 18U)
|
|
#define DMA_BASE (0xE7300000U)
|
|
#elif (DMA_CH == 32)
|
|
#define SYS_DMAC_BIT ((uint32_t)1U << 17U)
|
|
#define DMA_BASE (0xE7320000U)
|
|
#else
|
|
#define SYS_DMAC_BIT ((uint32_t)1U << 19U)
|
|
#define DMA_BASE (0xE6700000U)
|
|
#endif
|
|
|
|
/* DMA operation */
|
|
#define DMA_DMAOR (DMA_BASE + 0x0060U)
|
|
/* DMA secure control */
|
|
#define DMA_DMASEC (DMA_BASE + 0x0030U)
|
|
/* DMA channel clear */
|
|
#define DMA_DMACHCLR (DMA_BASE + 0x0080U)
|
|
/* DMA source address */
|
|
#define DMA_DMASAR (DMA_BASE + 0x8000U)
|
|
/* DMA destination address */
|
|
#define DMA_DMADAR (DMA_BASE + 0x8004U)
|
|
/* DMA transfer count */
|
|
#define DMA_DMATCR (DMA_BASE + 0x8008U)
|
|
/* DMA channel control */
|
|
#define DMA_DMACHCR (DMA_BASE + 0x800CU)
|
|
/* DMA fixed destination address */
|
|
#define DMA_DMAFIXDAR (DMA_BASE + 0x8014U)
|
|
|
|
#define DMA_USE_CHANNEL (0x00000001U)
|
|
#define DMAOR_INITIAL (0x0301U)
|
|
#define DMACHCLR_CH_ALL (0x0000FFFFU)
|
|
#define DMAFIXDAR_32BIT_SHIFT (32U)
|
|
#define DMAFIXDAR_DAR_MASK (0x000000FFU)
|
|
#define DMADAR_BOUNDARY_ADDR (0x100000000ULL)
|
|
#define DMATCR_CNT_SHIFT (6U)
|
|
#define DMATCR_MAX (0x00FFFFFFU)
|
|
#define DMACHCR_TRN_MODE (0x00105409U)
|
|
#define DMACHCR_DE_BIT (0x00000001U)
|
|
#define DMACHCR_TE_BIT (0x00000002U)
|
|
#define DMACHCR_CHE_BIT (0x80000000U)
|
|
|
|
#define DMA_SIZE_UNIT FLASH_TRANS_SIZE_UNIT
|
|
#define DMA_FRACTION_MASK (0xFFU)
|
|
#define DMA_DST_LIMIT (0x10000000000ULL)
|
|
|
|
/* transfer length limit */
|
|
#define DMA_LENGTH_LIMIT ((DMATCR_MAX * (1U << DMATCR_CNT_SHIFT)) \
|
|
& ~DMA_FRACTION_MASK)
|
|
|
|
static void dma_enable(void)
|
|
{
|
|
mstpcr_write(CPG_SMSTPCR2, CPG_MSTPSR2, SYS_DMAC_BIT);
|
|
}
|
|
|
|
static void dma_setup(void)
|
|
{
|
|
mmio_write_16(DMA_DMAOR, 0);
|
|
mmio_write_32(DMA_DMACHCLR, DMACHCLR_CH_ALL);
|
|
}
|
|
|
|
static void dma_start(uintptr_t dst, uint32_t src, uint32_t len)
|
|
{
|
|
mmio_write_16(DMA_DMAOR, DMAOR_INITIAL);
|
|
mmio_write_32(DMA_DMAFIXDAR, (dst >> DMAFIXDAR_32BIT_SHIFT) &
|
|
DMAFIXDAR_DAR_MASK);
|
|
mmio_write_32(DMA_DMADAR, dst & UINT32_MAX);
|
|
mmio_write_32(DMA_DMASAR, src);
|
|
mmio_write_32(DMA_DMATCR, len >> DMATCR_CNT_SHIFT);
|
|
mmio_write_32(DMA_DMASEC, DMA_USE_CHANNEL);
|
|
mmio_write_32(DMA_DMACHCR, DMACHCR_TRN_MODE);
|
|
}
|
|
|
|
static void dma_end(void)
|
|
{
|
|
while ((mmio_read_32(DMA_DMACHCR) & DMACHCR_TE_BIT) == 0) {
|
|
if ((mmio_read_32(DMA_DMACHCR) & DMACHCR_CHE_BIT) != 0U) {
|
|
ERROR("BL2: DMA - Channel Address Error\n");
|
|
panic();
|
|
break;
|
|
}
|
|
}
|
|
/* DMA transfer Disable */
|
|
mmio_clrbits_32(DMA_DMACHCR, DMACHCR_DE_BIT);
|
|
while ((mmio_read_32(DMA_DMACHCR) & DMACHCR_DE_BIT) != 0)
|
|
;
|
|
|
|
mmio_write_32(DMA_DMASEC, 0);
|
|
mmio_write_16(DMA_DMAOR, 0);
|
|
mmio_write_32(DMA_DMACHCLR, DMA_USE_CHANNEL);
|
|
}
|
|
|
|
void rcar_dma_exec(uintptr_t dst, uint32_t src, uint32_t len)
|
|
{
|
|
uint32_t dma_len = len;
|
|
|
|
if (len & DMA_FRACTION_MASK)
|
|
dma_len = (len + DMA_SIZE_UNIT) & ~DMA_FRACTION_MASK;
|
|
|
|
if (!dma_len || dma_len > DMA_LENGTH_LIMIT) {
|
|
ERROR("BL2: DMA - size invalid, length (0x%x)\n", dma_len);
|
|
panic();
|
|
}
|
|
|
|
if (src & DMA_FRACTION_MASK) {
|
|
ERROR("BL2: DMA - src address invalid (0x%x), len=(0x%x)\n",
|
|
src, dma_len);
|
|
panic();
|
|
}
|
|
|
|
if ((dst & UINT32_MAX) + dma_len > DMADAR_BOUNDARY_ADDR ||
|
|
(dst + dma_len > DMA_DST_LIMIT) ||
|
|
(dst & DMA_FRACTION_MASK)) {
|
|
ERROR("BL2: DMA - dest address invalid (0x%lx), len=(0x%x)\n",
|
|
dst, dma_len);
|
|
panic();
|
|
}
|
|
|
|
dma_start(dst, src, dma_len);
|
|
dma_end();
|
|
}
|
|
|
|
void rcar_dma_init(void)
|
|
{
|
|
dma_enable();
|
|
dma_setup();
|
|
}
|