Eric Lee / smarc-fsl-linux-kernel

Blame view

arch/arm/mach-ep93xx/dma.c 3.45 KB
edit raw normal view history
e791e3455   Mika Westerberg   ep93xx: add dmaen... 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
 
  /*
   * arch/arm/mach-ep93xx/dma.c
   *
   * Platform support code for the EP93xx dmaengine driver.
   *
   * Copyright (C) 2011 Mika Westerberg
   *
   * This work is based on the original dma-m2p implementation with
   * following copyrights:
   *
   *   Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
   *   Copyright (C) 2006 Applied Data Systems
   *   Copyright (C) 2009 Ryan Mallon <rmallon@gmail.com>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or (at
   * your option) any later version.
   */
  
  #include <linux/dmaengine.h>
  #include <linux/dma-mapping.h>
  #include <linux/init.h>
  #include <linux/interrupt.h>
  #include <linux/kernel.h>
  #include <linux/platform_device.h>
  
  #include <mach/dma.h>
  #include <mach/hardware.h>
  
  #define DMA_CHANNEL(_name, _base, _irq) \
  	{ .name = (_name), .base = (_base), .irq = (_irq) }
  
  /*
   * DMA M2P channels.
   *
   * On the EP93xx chip the following peripherals my be allocated to the 10
   * Memory to Internal Peripheral (M2P) channels (5 transmit + 5 receive).
   *
   *	I2S	contains 3 Tx and 3 Rx DMA Channels
   *	AAC	contains 3 Tx and 3 Rx DMA Channels
   *	UART1	contains 1 Tx and 1 Rx DMA Channels
   *	UART2	contains 1 Tx and 1 Rx DMA Channels
   *	UART3	contains 1 Tx and 1 Rx DMA Channels
   *	IrDA	contains 1 Tx and 1 Rx DMA Channels
   *
   * Registers are mapped statically in ep93xx_map_io().
   */
  static struct ep93xx_dma_chan_data ep93xx_dma_m2p_channels[] = {
  	DMA_CHANNEL("m2p0", EP93XX_DMA_BASE + 0x0000, IRQ_EP93XX_DMAM2P0),
  	DMA_CHANNEL("m2p1", EP93XX_DMA_BASE + 0x0040, IRQ_EP93XX_DMAM2P1),
  	DMA_CHANNEL("m2p2", EP93XX_DMA_BASE + 0x0080, IRQ_EP93XX_DMAM2P2),
  	DMA_CHANNEL("m2p3", EP93XX_DMA_BASE + 0x00c0, IRQ_EP93XX_DMAM2P3),
  	DMA_CHANNEL("m2p4", EP93XX_DMA_BASE + 0x0240, IRQ_EP93XX_DMAM2P4),
  	DMA_CHANNEL("m2p5", EP93XX_DMA_BASE + 0x0200, IRQ_EP93XX_DMAM2P5),
  	DMA_CHANNEL("m2p6", EP93XX_DMA_BASE + 0x02c0, IRQ_EP93XX_DMAM2P6),
  	DMA_CHANNEL("m2p7", EP93XX_DMA_BASE + 0x0280, IRQ_EP93XX_DMAM2P7),
  	DMA_CHANNEL("m2p8", EP93XX_DMA_BASE + 0x0340, IRQ_EP93XX_DMAM2P8),
  	DMA_CHANNEL("m2p9", EP93XX_DMA_BASE + 0x0300, IRQ_EP93XX_DMAM2P9),
  };
  
  static struct ep93xx_dma_platform_data ep93xx_dma_m2p_data = {
  	.channels		= ep93xx_dma_m2p_channels,
  	.num_channels		= ARRAY_SIZE(ep93xx_dma_m2p_channels),
  };
  
  static struct platform_device ep93xx_dma_m2p_device = {
  	.name			= "ep93xx-dma-m2p",
  	.id			= -1,
  	.dev			= {
  		.platform_data	= &ep93xx_dma_m2p_data,
  	},
  };
  
  /*
   * DMA M2M channels.
   *
   * There are 2 M2M channels which support memcpy/memset and in addition simple
   * hardware requests from/to SSP and IDE. We do not implement an external
   * hardware requests.
   *
   * Registers are mapped statically in ep93xx_map_io().
   */
  static struct ep93xx_dma_chan_data ep93xx_dma_m2m_channels[] = {
  	DMA_CHANNEL("m2m0", EP93XX_DMA_BASE + 0x0100, IRQ_EP93XX_DMAM2M0),
  	DMA_CHANNEL("m2m1", EP93XX_DMA_BASE + 0x0140, IRQ_EP93XX_DMAM2M1),
  };
  
  static struct ep93xx_dma_platform_data ep93xx_dma_m2m_data = {
  	.channels		= ep93xx_dma_m2m_channels,
  	.num_channels		= ARRAY_SIZE(ep93xx_dma_m2m_channels),
  };
  
  static struct platform_device ep93xx_dma_m2m_device = {
  	.name			= "ep93xx-dma-m2m",
  	.id			= -1,
  	.dev			= {
  		.platform_data	= &ep93xx_dma_m2m_data,
  	},
  };
  
  static int __init ep93xx_dma_init(void)
  {
  	platform_device_register(&ep93xx_dma_m2p_device);
  	platform_device_register(&ep93xx_dma_m2m_device);
  	return 0;
  }
  arch_initcall(ep93xx_dma_init);