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u-boot/drivers/dma/fsl_dma.c
Tom Rini 8897bf4288 global: Remove unused or unnecessary CONFIG symbols related to DDR
These symbols are now either unused or were only used within the config
file to determine other logic, which could be done in a way that doesn't
further pollute the CONFIG namespace.

Signed-off-by: Tom Rini <trini@konsulko.com>
2021-08-30 19:49:22 -04:00

165 lines
3.8 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2004,2007,2008 Freescale Semiconductor, Inc.
* (C) Copyright 2002, 2003 Motorola Inc.
* Xianghua Xiao (X.Xiao@motorola.com)
*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
#include <config.h>
#include <common.h>
#include <asm/io.h>
#include <asm/fsl_dma.h>
/* Controller can only transfer 2^26 - 1 bytes at a time */
#define FSL_DMA_MAX_SIZE (0x3ffffff)
#if defined(CONFIG_MPC83xx)
#define FSL_DMA_MR_DEFAULT (FSL_DMA_MR_CTM_DIRECT | FSL_DMA_MR_DMSEN)
#else
#define FSL_DMA_MR_DEFAULT (FSL_DMA_MR_BWC_DIS | FSL_DMA_MR_CTM_DIRECT)
#endif
#if defined(CONFIG_MPC83xx)
dma83xx_t *dma_base = (void *)(CONFIG_SYS_MPC83xx_DMA_ADDR);
#elif defined(CONFIG_MPC85xx)
ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC85xx_DMA_ADDR);
#elif defined(CONFIG_MPC86xx)
ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC86xx_DMA_ADDR);
#else
#error "Freescale DMA engine not supported on your processor"
#endif
static void dma_sync(void)
{
#if defined(CONFIG_MPC85xx)
asm("sync; isync; msync");
#elif defined(CONFIG_MPC86xx)
asm("sync; isync");
#endif
}
static void out_dma32(volatile unsigned *addr, int val)
{
#if defined(CONFIG_MPC83xx)
out_le32(addr, val);
#else
out_be32(addr, val);
#endif
}
static uint in_dma32(volatile unsigned *addr)
{
#if defined(CONFIG_MPC83xx)
return in_le32(addr);
#else
return in_be32(addr);
#endif
}
static uint dma_check(void) {
volatile fsl_dma_t *dma = &dma_base->dma[0];
uint status;
/* While the channel is busy, spin */
do {
status = in_dma32(&dma->sr);
} while (status & FSL_DMA_SR_CB);
/* clear MR[CS] channel start bit */
out_dma32(&dma->mr, in_dma32(&dma->mr) & ~FSL_DMA_MR_CS);
dma_sync();
if (status != 0)
printf ("DMA Error: status = %x\n", status);
return status;
}
#if !defined(CONFIG_MPC83xx)
void dma_init(void) {
volatile fsl_dma_t *dma = &dma_base->dma[0];
out_dma32(&dma->satr, FSL_DMA_SATR_SREAD_SNOOP);
out_dma32(&dma->datr, FSL_DMA_DATR_DWRITE_SNOOP);
out_dma32(&dma->sr, 0xffffffff); /* clear any errors */
dma_sync();
}
#endif
int dmacpy(phys_addr_t dest, phys_addr_t src, phys_size_t count) {
volatile fsl_dma_t *dma = &dma_base->dma[0];
uint xfer_size;
while (count) {
xfer_size = min(FSL_DMA_MAX_SIZE, count);
out_dma32(&dma->dar, (u32) (dest & 0xFFFFFFFF));
out_dma32(&dma->sar, (u32) (src & 0xFFFFFFFF));
#if !defined(CONFIG_MPC83xx)
out_dma32(&dma->satr,
in_dma32(&dma->satr) | (u32)((u64)src >> 32));
out_dma32(&dma->datr,
in_dma32(&dma->datr) | (u32)((u64)dest >> 32));
#endif
out_dma32(&dma->bcr, xfer_size);
dma_sync();
/* Prepare mode register */
out_dma32(&dma->mr, FSL_DMA_MR_DEFAULT);
dma_sync();
/* Start the transfer */
out_dma32(&dma->mr, FSL_DMA_MR_DEFAULT | FSL_DMA_MR_CS);
count -= xfer_size;
src += xfer_size;
dest += xfer_size;
dma_sync();
if (dma_check())
return -1;
}
return 0;
}
/*
* 85xx/86xx use dma to initialize SDRAM when !CONFIG_ECC_INIT_VIA_DDRCONTROLLER
*/
#if ((!defined CONFIG_MPC83xx && defined(CONFIG_DDR_ECC) && \
!defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)))
void dma_meminit(uint val, uint size)
{
uint *p = 0;
uint i = 0;
for (*p = 0; p < (uint *)(8 * 1024); p++) {
if (((uint)p & 0x1f) == 0)
ppcDcbz((ulong)p);
*p = (uint)CONFIG_MEM_INIT_VALUE;
if (((uint)p & 0x1c) == 0x1c)
ppcDcbf((ulong)p);
}
dmacpy(0x002000, 0, 0x002000); /* 8K */
dmacpy(0x004000, 0, 0x004000); /* 16K */
dmacpy(0x008000, 0, 0x008000); /* 32K */
dmacpy(0x010000, 0, 0x010000); /* 64K */
dmacpy(0x020000, 0, 0x020000); /* 128K */
dmacpy(0x040000, 0, 0x040000); /* 256K */
dmacpy(0x080000, 0, 0x080000); /* 512K */
dmacpy(0x100000, 0, 0x100000); /* 1M */
dmacpy(0x200000, 0, 0x200000); /* 2M */
dmacpy(0x400000, 0, 0x400000); /* 4M */
for (i = 1; i < size / 0x800000; i++)
dmacpy((0x800000 * i), 0, 0x800000);
}
#endif