mirror of
https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
167 lines
3.9 KiB
C
167 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2004,2007,2008 Freescale Semiconductor, Inc.
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* (C) Copyright 2002, 2003 Motorola Inc.
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* Xianghua Xiao (X.Xiao@motorola.com)
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*
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* (C) Copyright 2000
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*/
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#include <config.h>
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#include <common.h>
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#include <asm/io.h>
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#include <asm/fsl_dma.h>
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/* Controller can only transfer 2^26 - 1 bytes at a time */
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#define FSL_DMA_MAX_SIZE (0x3ffffff)
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#if defined(CONFIG_MPC83xx)
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#define FSL_DMA_MR_DEFAULT (FSL_DMA_MR_CTM_DIRECT | FSL_DMA_MR_DMSEN)
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#else
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#define FSL_DMA_MR_DEFAULT (FSL_DMA_MR_BWC_DIS | FSL_DMA_MR_CTM_DIRECT)
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#endif
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#if defined(CONFIG_MPC83xx)
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dma83xx_t *dma_base = (void *)(CONFIG_SYS_MPC83xx_DMA_ADDR);
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#elif defined(CONFIG_MPC85xx)
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ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC85xx_DMA_ADDR);
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#elif defined(CONFIG_MPC86xx)
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ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC86xx_DMA_ADDR);
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#else
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#error "Freescale DMA engine not supported on your processor"
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#endif
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static void dma_sync(void)
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{
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#if defined(CONFIG_MPC85xx)
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asm("sync; isync; msync");
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#elif defined(CONFIG_MPC86xx)
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asm("sync; isync");
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#endif
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}
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static void out_dma32(volatile unsigned *addr, int val)
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{
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#if defined(CONFIG_MPC83xx)
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out_le32(addr, val);
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#else
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out_be32(addr, val);
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#endif
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}
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static uint in_dma32(volatile unsigned *addr)
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{
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#if defined(CONFIG_MPC83xx)
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return in_le32(addr);
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#else
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return in_be32(addr);
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#endif
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}
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static uint dma_check(void) {
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volatile fsl_dma_t *dma = &dma_base->dma[0];
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uint status;
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/* While the channel is busy, spin */
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do {
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status = in_dma32(&dma->sr);
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} while (status & FSL_DMA_SR_CB);
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/* clear MR[CS] channel start bit */
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out_dma32(&dma->mr, in_dma32(&dma->mr) & ~FSL_DMA_MR_CS);
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dma_sync();
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if (status != 0)
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printf ("DMA Error: status = %x\n", status);
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return status;
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}
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#if !defined(CONFIG_MPC83xx)
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void dma_init(void) {
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volatile fsl_dma_t *dma = &dma_base->dma[0];
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out_dma32(&dma->satr, FSL_DMA_SATR_SREAD_SNOOP);
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out_dma32(&dma->datr, FSL_DMA_DATR_DWRITE_SNOOP);
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out_dma32(&dma->sr, 0xffffffff); /* clear any errors */
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dma_sync();
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}
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#endif
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int dmacpy(phys_addr_t dest, phys_addr_t src, phys_size_t count) {
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volatile fsl_dma_t *dma = &dma_base->dma[0];
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uint xfer_size;
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while (count) {
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xfer_size = min(FSL_DMA_MAX_SIZE, count);
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out_dma32(&dma->dar, (u32) (dest & 0xFFFFFFFF));
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out_dma32(&dma->sar, (u32) (src & 0xFFFFFFFF));
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#if !defined(CONFIG_MPC83xx)
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out_dma32(&dma->satr,
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in_dma32(&dma->satr) | (u32)((u64)src >> 32));
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out_dma32(&dma->datr,
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in_dma32(&dma->datr) | (u32)((u64)dest >> 32));
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#endif
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out_dma32(&dma->bcr, xfer_size);
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dma_sync();
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/* Prepare mode register */
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out_dma32(&dma->mr, FSL_DMA_MR_DEFAULT);
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dma_sync();
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/* Start the transfer */
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out_dma32(&dma->mr, FSL_DMA_MR_DEFAULT | FSL_DMA_MR_CS);
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count -= xfer_size;
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src += xfer_size;
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dest += xfer_size;
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dma_sync();
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if (dma_check())
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return -1;
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}
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return 0;
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}
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/*
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* 85xx/86xx use dma to initialize SDRAM when !CONFIG_ECC_INIT_VIA_DDRCONTROLLER
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* while 83xx uses dma to initialize SDRAM when CONFIG_DDR_ECC_INIT_VIA_DMA
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*/
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#if ((!defined CONFIG_MPC83xx && defined(CONFIG_DDR_ECC) && \
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!defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)) || \
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(defined(CONFIG_MPC83xx) && defined(CONFIG_DDR_ECC_INIT_VIA_DMA)))
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void dma_meminit(uint val, uint size)
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{
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uint *p = 0;
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uint i = 0;
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for (*p = 0; p < (uint *)(8 * 1024); p++) {
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if (((uint)p & 0x1f) == 0)
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ppcDcbz((ulong)p);
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*p = (uint)CONFIG_MEM_INIT_VALUE;
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if (((uint)p & 0x1c) == 0x1c)
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ppcDcbf((ulong)p);
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}
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dmacpy(0x002000, 0, 0x002000); /* 8K */
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dmacpy(0x004000, 0, 0x004000); /* 16K */
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dmacpy(0x008000, 0, 0x008000); /* 32K */
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dmacpy(0x010000, 0, 0x010000); /* 64K */
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dmacpy(0x020000, 0, 0x020000); /* 128K */
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dmacpy(0x040000, 0, 0x040000); /* 256K */
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dmacpy(0x080000, 0, 0x080000); /* 512K */
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dmacpy(0x100000, 0, 0x100000); /* 1M */
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dmacpy(0x200000, 0, 0x200000); /* 2M */
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dmacpy(0x400000, 0, 0x400000); /* 4M */
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for (i = 1; i < size / 0x800000; i++)
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dmacpy((0x800000 * i), 0, 0x800000);
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}
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#endif
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