2 * Copyright 2004,2007,2008 Freescale Semiconductor, Inc.
3 * (C) Copyright 2002, 2003 Motorola Inc.
4 * Xianghua Xiao (X.Xiao@motorola.com)
7 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 #include <asm/fsl_dma.h>
33 /* Controller can only transfer 2^26 - 1 bytes at a time */
34 #define FSL_DMA_MAX_SIZE (0x3ffffff)
36 #if defined(CONFIG_MPC83xx)
37 #define FSL_DMA_MR_DEFAULT (FSL_DMA_MR_CTM_DIRECT | FSL_DMA_MR_DMSEN)
39 #define FSL_DMA_MR_DEFAULT (FSL_DMA_MR_BWC_DIS | FSL_DMA_MR_CTM_DIRECT)
43 #if defined(CONFIG_MPC83xx)
44 dma83xx_t *dma_base = (void *)(CONFIG_SYS_MPC83xx_DMA_ADDR);
45 #elif defined(CONFIG_MPC85xx)
46 ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC85xx_DMA_ADDR);
47 #elif defined(CONFIG_MPC86xx)
48 ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC86xx_DMA_ADDR);
50 #error "Freescale DMA engine not supported on your processor"
53 static void dma_sync(void)
55 #if defined(CONFIG_MPC85xx)
56 asm("sync; isync; msync");
57 #elif defined(CONFIG_MPC86xx)
62 static void out_dma32(volatile unsigned *addr, int val)
64 #if defined(CONFIG_MPC83xx)
71 static uint in_dma32(volatile unsigned *addr)
73 #if defined(CONFIG_MPC83xx)
80 static uint dma_check(void) {
81 volatile fsl_dma_t *dma = &dma_base->dma[0];
84 /* While the channel is busy, spin */
86 status = in_dma32(&dma->sr);
87 } while (status & FSL_DMA_SR_CB);
89 /* clear MR[CS] channel start bit */
90 out_dma32(&dma->mr, in_dma32(&dma->mr) & ~FSL_DMA_MR_CS);
94 printf ("DMA Error: status = %x\n", status);
99 #if !defined(CONFIG_MPC83xx)
100 void dma_init(void) {
101 volatile fsl_dma_t *dma = &dma_base->dma[0];
103 out_dma32(&dma->satr, FSL_DMA_SATR_SREAD_SNOOP);
104 out_dma32(&dma->datr, FSL_DMA_DATR_DWRITE_SNOOP);
105 out_dma32(&dma->sr, 0xffffffff); /* clear any errors */
110 int dmacpy(phys_addr_t dest, phys_addr_t src, phys_size_t count) {
111 volatile fsl_dma_t *dma = &dma_base->dma[0];
115 xfer_size = MIN(FSL_DMA_MAX_SIZE, count);
117 out_dma32(&dma->dar, (uint) dest);
118 out_dma32(&dma->sar, (uint) src);
119 out_dma32(&dma->bcr, xfer_size);
122 /* Prepare mode register */
123 out_dma32(&dma->mr, FSL_DMA_MR_DEFAULT);
126 /* Start the transfer */
127 out_dma32(&dma->mr, FSL_DMA_MR_DEFAULT | FSL_DMA_MR_CS);
143 * 85xx/86xx use dma to initialize SDRAM when !CONFIG_ECC_INIT_VIA_DDRCONTROLLER
144 * while 83xx uses dma to initialize SDRAM when CONFIG_DDR_ECC_INIT_VIA_DMA
146 #if ((!defined CONFIG_MPC83xx && defined(CONFIG_DDR_ECC) && \
147 !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)) || \
148 (defined(CONFIG_MPC83xx) && defined(CONFIG_DDR_ECC_INIT_VIA_DMA)))
149 void dma_meminit(uint val, uint size)
154 for (*p = 0; p < (uint *)(8 * 1024); p++) {
155 if (((uint)p & 0x1f) == 0)
158 *p = (uint)CONFIG_MEM_INIT_VALUE;
160 if (((uint)p & 0x1c) == 0x1c)
164 dmacpy(0x002000, 0, 0x002000); /* 8K */
165 dmacpy(0x004000, 0, 0x004000); /* 16K */
166 dmacpy(0x008000, 0, 0x008000); /* 32K */
167 dmacpy(0x010000, 0, 0x010000); /* 64K */
168 dmacpy(0x020000, 0, 0x020000); /* 128K */
169 dmacpy(0x040000, 0, 0x040000); /* 256K */
170 dmacpy(0x080000, 0, 0x080000); /* 512K */
171 dmacpy(0x100000, 0, 0x100000); /* 1M */
172 dmacpy(0x200000, 0, 0x200000); /* 2M */
173 dmacpy(0x400000, 0, 0x400000); /* 4M */
175 for (i = 1; i < size / 0x800000; i++)
176 dmacpy((0x800000 * i), 0, 0x800000);