Merge branch 'wireless-next' of git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi...
[pandora-kernel.git] / drivers / dma / shdma.h
1 /*
2  * Renesas SuperH DMA Engine support
3  *
4  * Copyright (C) 2009 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
5  * Copyright (C) 2009 Renesas Solutions, Inc. All rights reserved.
6  *
7  * This is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  */
13 #ifndef __DMA_SHDMA_H
14 #define __DMA_SHDMA_H
15
16 #include <linux/dmaengine.h>
17 #include <linux/interrupt.h>
18 #include <linux/list.h>
19
20 #define SH_DMAC_MAX_CHANNELS 20
21 #define SH_DMA_SLAVE_NUMBER 256
22 #define SH_DMA_TCR_MAX 0x00FFFFFF       /* 16MB */
23
24 struct device;
25
26 enum dmae_pm_state {
27         DMAE_PM_ESTABLISHED,
28         DMAE_PM_BUSY,
29         DMAE_PM_PENDING,
30 };
31
32 struct sh_dmae_chan {
33         dma_cookie_t completed_cookie;  /* The maximum cookie completed */
34         spinlock_t desc_lock;           /* Descriptor operation lock */
35         struct list_head ld_queue;      /* Link descriptors queue */
36         struct list_head ld_free;       /* Link descriptors free */
37         struct dma_chan common;         /* DMA common channel */
38         struct device *dev;             /* Channel device */
39         struct tasklet_struct tasklet;  /* Tasklet */
40         int descs_allocated;            /* desc count */
41         int xmit_shift;                 /* log_2(bytes_per_xfer) */
42         int irq;
43         int id;                         /* Raw id of this channel */
44         u32 __iomem *base;
45         char dev_id[16];                /* unique name per DMAC of channel */
46         int pm_error;
47         enum dmae_pm_state pm_state;
48 };
49
50 struct sh_dmae_device {
51         struct dma_device common;
52         struct sh_dmae_chan *chan[SH_DMAC_MAX_CHANNELS];
53         struct sh_dmae_pdata *pdata;
54         struct list_head node;
55         u32 __iomem *chan_reg;
56         u16 __iomem *dmars;
57         unsigned int chcr_offset;
58         u32 chcr_ie_bit;
59 };
60
61 #define to_sh_chan(chan) container_of(chan, struct sh_dmae_chan, common)
62 #define to_sh_desc(lh) container_of(lh, struct sh_desc, node)
63 #define tx_to_sh_desc(tx) container_of(tx, struct sh_desc, async_tx)
64 #define to_sh_dev(chan) container_of(chan->common.device,\
65                                      struct sh_dmae_device, common)
66
67 #endif  /* __DMA_SHDMA_H */