]> Git Repo - J-u-boot.git/blob - drivers/dma/fsl_dma.c
Merge patch series "Clean-up patch set for MbedTLS integration"
[J-u-boot.git] / drivers / dma / fsl_dma.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright 2004,2007,2008 Freescale Semiconductor, Inc.
4  * (C) Copyright 2002, 2003 Motorola Inc.
5  * Xianghua Xiao ([email protected])
6  *
7  * (C) Copyright 2000
8  * Wolfgang Denk, DENX Software Engineering, [email protected].
9  */
10
11 #include <config.h>
12 #include <asm/io.h>
13 #include <asm/fsl_dma.h>
14
15 /* Controller can only transfer 2^26 - 1 bytes at a time */
16 #define FSL_DMA_MAX_SIZE        (0x3ffffff)
17
18 #if defined(CONFIG_MPC83xx)
19 #define FSL_DMA_MR_DEFAULT (FSL_DMA_MR_CTM_DIRECT | FSL_DMA_MR_DMSEN)
20 #else
21 #define FSL_DMA_MR_DEFAULT (FSL_DMA_MR_BWC_DIS | FSL_DMA_MR_CTM_DIRECT)
22 #endif
23
24
25 #if defined(CONFIG_MPC83xx)
26 dma83xx_t *dma_base = (void *)(CFG_SYS_MPC83xx_DMA_ADDR);
27 #elif defined(CONFIG_MPC85xx)
28 ccsr_dma_t *dma_base = (void *)(CFG_SYS_MPC85xx_DMA_ADDR);
29 #elif defined(CONFIG_MPC86xx)
30 ccsr_dma_t *dma_base = (void *)(CONFIG_SYS_MPC86xx_DMA_ADDR);
31 #else
32 #error "Freescale DMA engine not supported on your processor"
33 #endif
34
35 static void dma_sync(void)
36 {
37 #if defined(CONFIG_MPC85xx)
38         asm("sync; isync; msync");
39 #elif defined(CONFIG_MPC86xx)
40         asm("sync; isync");
41 #endif
42 }
43
44 static void out_dma32(volatile unsigned *addr, int val)
45 {
46 #if defined(CONFIG_MPC83xx)
47         out_le32(addr, val);
48 #else
49         out_be32(addr, val);
50 #endif
51 }
52
53 static uint in_dma32(volatile unsigned *addr)
54 {
55 #if defined(CONFIG_MPC83xx)
56         return in_le32(addr);
57 #else
58         return in_be32(addr);
59 #endif
60 }
61
62 static uint dma_check(void) {
63         volatile fsl_dma_t *dma = &dma_base->dma[0];
64         uint status;
65
66         /* While the channel is busy, spin */
67         do {
68                 status = in_dma32(&dma->sr);
69         } while (status & FSL_DMA_SR_CB);
70
71         /* clear MR[CS] channel start bit */
72         out_dma32(&dma->mr, in_dma32(&dma->mr) & ~FSL_DMA_MR_CS);
73         dma_sync();
74
75         if (status != 0)
76                 printf ("DMA Error: status = %x\n", status);
77
78         return status;
79 }
80
81 #if !defined(CONFIG_MPC83xx)
82 void dma_init(void) {
83         volatile fsl_dma_t *dma = &dma_base->dma[0];
84
85         out_dma32(&dma->satr, FSL_DMA_SATR_SREAD_SNOOP);
86         out_dma32(&dma->datr, FSL_DMA_DATR_DWRITE_SNOOP);
87         out_dma32(&dma->sr, 0xffffffff); /* clear any errors */
88         dma_sync();
89 }
90 #endif
91
92 int dmacpy(phys_addr_t dest, phys_addr_t src, phys_size_t count) {
93         volatile fsl_dma_t *dma = &dma_base->dma[0];
94         uint xfer_size;
95
96         while (count) {
97                 xfer_size = min(FSL_DMA_MAX_SIZE, count);
98
99                 out_dma32(&dma->dar, (u32) (dest & 0xFFFFFFFF));
100                 out_dma32(&dma->sar, (u32) (src & 0xFFFFFFFF));
101 #if !defined(CONFIG_MPC83xx)
102                 out_dma32(&dma->satr,
103                         in_dma32(&dma->satr) | (u32)((u64)src >> 32));
104                 out_dma32(&dma->datr,
105                         in_dma32(&dma->datr) | (u32)((u64)dest >> 32));
106 #endif
107                 out_dma32(&dma->bcr, xfer_size);
108                 dma_sync();
109
110                 /* Prepare mode register */
111                 out_dma32(&dma->mr, FSL_DMA_MR_DEFAULT);
112                 dma_sync();
113
114                 /* Start the transfer */
115                 out_dma32(&dma->mr, FSL_DMA_MR_DEFAULT | FSL_DMA_MR_CS);
116
117                 count -= xfer_size;
118                 src += xfer_size;
119                 dest += xfer_size;
120
121                 dma_sync();
122
123                 if (dma_check())
124                         return -1;
125         }
126
127         return 0;
128 }
129
130 /*
131  * 85xx/86xx use dma to initialize SDRAM when !CONFIG_ECC_INIT_VIA_DDRCONTROLLER
132  */
133 #if ((!defined CONFIG_MPC83xx && defined(CONFIG_DDR_ECC) &&     \
134         !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)))
135 void dma_meminit(uint size)
136 {
137         uint *p = 0;
138         uint i = 0;
139
140         for (*p = 0; p < (uint *)(8 * 1024); p++) {
141                 if (((uint)p & 0x1f) == 0)
142                         ppcDcbz((ulong)p);
143
144                 *p = (uint)0xDEADBEEF;
145
146                 if (((uint)p & 0x1c) == 0x1c)
147                         ppcDcbf((ulong)p);
148         }
149
150         dmacpy(0x002000, 0, 0x002000); /* 8K */
151         dmacpy(0x004000, 0, 0x004000); /* 16K */
152         dmacpy(0x008000, 0, 0x008000); /* 32K */
153         dmacpy(0x010000, 0, 0x010000); /* 64K */
154         dmacpy(0x020000, 0, 0x020000); /* 128K */
155         dmacpy(0x040000, 0, 0x040000); /* 256K */
156         dmacpy(0x080000, 0, 0x080000); /* 512K */
157         dmacpy(0x100000, 0, 0x100000); /* 1M */
158         dmacpy(0x200000, 0, 0x200000); /* 2M */
159         dmacpy(0x400000, 0, 0x400000); /* 4M */
160
161         for (i = 1; i < size / 0x800000; i++)
162                 dmacpy((0x800000 * i), 0, 0x800000);
163 }
164 #endif
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