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https://github.com/AsahiLinux/u-boot
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9a865fff15
Commit 359ec49319 broke support for the
Freescale DMA engine on the 83xx parts. This is due to using registers
which do not exist on 83xx. Remove the attribute register accesses from
the 83xx build.
Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Cc: York Sun <yorksun@freescale.com>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
184 lines
4.7 KiB
C
184 lines
4.7 KiB
C
/*
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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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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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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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