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DMAENGINE: generic channel status v2
[net-next-2.6.git] / arch / arm / mach-u300 / include / mach / coh901318.h
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1/*
2 *
3 * include/linux/coh901318.h
4 *
5 *
6 * Copyright (C) 2007-2009 ST-Ericsson
7 * License terms: GNU General Public License (GPL) version 2
8 * DMA driver for COH 901 318
9 * Author: Per Friden <per.friden@stericsson.com>
10 */
11
12#ifndef COH901318_H
13#define COH901318_H
14
15#include <linux/device.h>
16#include <linux/dmaengine.h>
17
18#define MAX_DMA_PACKET_SIZE_SHIFT 11
19#define MAX_DMA_PACKET_SIZE (1 << MAX_DMA_PACKET_SIZE_SHIFT)
20
21/**
22 * struct coh901318_lli - linked list item for DMAC
23 * @control: control settings for DMAC
24 * @src_addr: transfer source address
25 * @dst_addr: transfer destination address
26 * @link_addr: physical address to next lli
27 * @virt_link_addr: virtual addres of next lli (only used by pool_free)
28 * @phy_this: physical address of current lli (only used by pool_free)
29 */
30struct coh901318_lli {
31 u32 control;
32 dma_addr_t src_addr;
33 dma_addr_t dst_addr;
34 dma_addr_t link_addr;
35
36 void *virt_link_addr;
37 dma_addr_t phy_this;
38};
39/**
40 * struct coh901318_params - parameters for DMAC configuration
41 * @config: DMA config register
42 * @ctrl_lli_last: DMA control register for the last lli in the list
43 * @ctrl_lli: DMA control register for an lli
44 * @ctrl_lli_chained: DMA control register for a chained lli
45 */
46struct coh901318_params {
47 u32 config;
48 u32 ctrl_lli_last;
49 u32 ctrl_lli;
50 u32 ctrl_lli_chained;
51};
52/**
53 * struct coh_dma_channel - dma channel base
54 * @name: ascii name of dma channel
55 * @number: channel id number
b87108a7 56 * @desc_nbr_max: number of preallocated descriptors
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57 * @priority_high: prio of channel, 0 low otherwise high.
58 * @param: configuration parameters
59 * @dev_addr: physical address of periphal connected to channel
60 */
61struct coh_dma_channel {
62 const char name[32];
63 const int number;
64 const int desc_nbr_max;
65 const int priority_high;
66 const struct coh901318_params param;
67 const dma_addr_t dev_addr;
68};
69
70/**
71 * dma_access_memory_state_t - register dma for memory access
72 *
73 * @dev: The dma device
74 * @active: 1 means dma intends to access memory
75 * 0 means dma wont access memory
76 */
77typedef void (*dma_access_memory_state_t)(struct device *dev,
78 bool active);
79
80/**
81 * struct powersave - DMA power save structure
82 * @lock: lock protecting data in this struct
83 * @started_channels: bit mask indicating active dma channels
84 */
85struct powersave {
86 spinlock_t lock;
87 u64 started_channels;
88};
89/**
90 * struct coh901318_platform - platform arch structure
91 * @chans_slave: specifying dma slave channels
92 * @chans_memcpy: specifying dma memcpy channels
93 * @access_memory_state: requesting DMA memeory access (on / off)
94 * @chan_conf: dma channel configurations
95 * @max_channels: max number of dma chanenls
96 */
97struct coh901318_platform {
98 const int *chans_slave;
99 const int *chans_memcpy;
100 const dma_access_memory_state_t access_memory_state;
101 const struct coh_dma_channel *chan_conf;
102 const int max_channels;
103};
104
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105/**
106 * coh901318_filter_id() - DMA channel filter function
107 * @chan: dma channel handle
108 * @chan_id: id of dma channel to be filter out
109 *
110 * In dma_request_channel() it specifies what channel id to be requested
111 */
112bool coh901318_filter_id(struct dma_chan *chan, void *chan_id);
113
114/*
115 * DMA Controller - this access the static mappings of the coh901318 dma.
116 *
117 */
118
119#define COH901318_MOD32_MASK (0x1F)
120#define COH901318_WORD_MASK (0xFFFFFFFF)
121/* INT_STATUS - Interrupt Status Registers 32bit (R/-) */
122#define COH901318_INT_STATUS1 (0x0000)
123#define COH901318_INT_STATUS2 (0x0004)
124/* TC_INT_STATUS - Terminal Count Interrupt Status Registers 32bit (R/-) */
125#define COH901318_TC_INT_STATUS1 (0x0008)
126#define COH901318_TC_INT_STATUS2 (0x000C)
127/* TC_INT_CLEAR - Terminal Count Interrupt Clear Registers 32bit (-/W) */
128#define COH901318_TC_INT_CLEAR1 (0x0010)
129#define COH901318_TC_INT_CLEAR2 (0x0014)
130/* RAW_TC_INT_STATUS - Raw Term Count Interrupt Status Registers 32bit (R/-) */
131#define COH901318_RAW_TC_INT_STATUS1 (0x0018)
132#define COH901318_RAW_TC_INT_STATUS2 (0x001C)
133/* BE_INT_STATUS - Bus Error Interrupt Status Registers 32bit (R/-) */
134#define COH901318_BE_INT_STATUS1 (0x0020)
135#define COH901318_BE_INT_STATUS2 (0x0024)
136/* BE_INT_CLEAR - Bus Error Interrupt Clear Registers 32bit (-/W) */
137#define COH901318_BE_INT_CLEAR1 (0x0028)
138#define COH901318_BE_INT_CLEAR2 (0x002C)
139/* RAW_BE_INT_STATUS - Raw Term Count Interrupt Status Registers 32bit (R/-) */
140#define COH901318_RAW_BE_INT_STATUS1 (0x0030)
141#define COH901318_RAW_BE_INT_STATUS2 (0x0034)
142
143/*
144 * CX_CFG - Channel Configuration Registers 32bit (R/W)
145 */
146#define COH901318_CX_CFG (0x0100)
147#define COH901318_CX_CFG_SPACING (0x04)
148/* Channel enable activates tha dma job */
149#define COH901318_CX_CFG_CH_ENABLE (0x00000001)
150#define COH901318_CX_CFG_CH_DISABLE (0x00000000)
151/* Request Mode */
152#define COH901318_CX_CFG_RM_MASK (0x00000006)
153#define COH901318_CX_CFG_RM_MEMORY_TO_MEMORY (0x0 << 1)
154#define COH901318_CX_CFG_RM_PRIMARY_TO_MEMORY (0x1 << 1)
155#define COH901318_CX_CFG_RM_MEMORY_TO_PRIMARY (0x1 << 1)
156#define COH901318_CX_CFG_RM_PRIMARY_TO_SECONDARY (0x3 << 1)
157#define COH901318_CX_CFG_RM_SECONDARY_TO_PRIMARY (0x3 << 1)
158/* Linked channel request field. RM must == 11 */
159#define COH901318_CX_CFG_LCRF_SHIFT 3
160#define COH901318_CX_CFG_LCRF_MASK (0x000001F8)
161#define COH901318_CX_CFG_LCR_DISABLE (0x00000000)
162/* Terminal Counter Interrupt Request Mask */
163#define COH901318_CX_CFG_TC_IRQ_ENABLE (0x00000200)
164#define COH901318_CX_CFG_TC_IRQ_DISABLE (0x00000000)
165/* Bus Error interrupt Mask */
166#define COH901318_CX_CFG_BE_IRQ_ENABLE (0x00000400)
167#define COH901318_CX_CFG_BE_IRQ_DISABLE (0x00000000)
168
169/*
170 * CX_STAT - Channel Status Registers 32bit (R/-)
171 */
172#define COH901318_CX_STAT (0x0200)
173#define COH901318_CX_STAT_SPACING (0x04)
174#define COH901318_CX_STAT_RBE_IRQ_IND (0x00000008)
175#define COH901318_CX_STAT_RTC_IRQ_IND (0x00000004)
176#define COH901318_CX_STAT_ACTIVE (0x00000002)
177#define COH901318_CX_STAT_ENABLED (0x00000001)
178
179/*
180 * CX_CTRL - Channel Control Registers 32bit (R/W)
181 */
182#define COH901318_CX_CTRL (0x0400)
183#define COH901318_CX_CTRL_SPACING (0x10)
184/* Transfer Count Enable */
185#define COH901318_CX_CTRL_TC_ENABLE (0x00001000)
186#define COH901318_CX_CTRL_TC_DISABLE (0x00000000)
187/* Transfer Count Value 0 - 4095 */
188#define COH901318_CX_CTRL_TC_VALUE_MASK (0x00000FFF)
189/* Burst count */
190#define COH901318_CX_CTRL_BURST_COUNT_MASK (0x0000E000)
191#define COH901318_CX_CTRL_BURST_COUNT_64_BYTES (0x7 << 13)
192#define COH901318_CX_CTRL_BURST_COUNT_48_BYTES (0x6 << 13)
193#define COH901318_CX_CTRL_BURST_COUNT_32_BYTES (0x5 << 13)
194#define COH901318_CX_CTRL_BURST_COUNT_16_BYTES (0x4 << 13)
195#define COH901318_CX_CTRL_BURST_COUNT_8_BYTES (0x3 << 13)
196#define COH901318_CX_CTRL_BURST_COUNT_4_BYTES (0x2 << 13)
197#define COH901318_CX_CTRL_BURST_COUNT_2_BYTES (0x1 << 13)
198#define COH901318_CX_CTRL_BURST_COUNT_1_BYTE (0x0 << 13)
199/* Source bus size */
200#define COH901318_CX_CTRL_SRC_BUS_SIZE_MASK (0x00030000)
201#define COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS (0x2 << 16)
202#define COH901318_CX_CTRL_SRC_BUS_SIZE_16_BITS (0x1 << 16)
203#define COH901318_CX_CTRL_SRC_BUS_SIZE_8_BITS (0x0 << 16)
204/* Source address increment */
205#define COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE (0x00040000)
206#define COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE (0x00000000)
207/* Destination Bus Size */
208#define COH901318_CX_CTRL_DST_BUS_SIZE_MASK (0x00180000)
209#define COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS (0x2 << 19)
210#define COH901318_CX_CTRL_DST_BUS_SIZE_16_BITS (0x1 << 19)
211#define COH901318_CX_CTRL_DST_BUS_SIZE_8_BITS (0x0 << 19)
212/* Destination address increment */
213#define COH901318_CX_CTRL_DST_ADDR_INC_ENABLE (0x00200000)
214#define COH901318_CX_CTRL_DST_ADDR_INC_DISABLE (0x00000000)
215/* Master Mode (Master2 is only connected to MSL) */
216#define COH901318_CX_CTRL_MASTER_MODE_MASK (0x00C00000)
217#define COH901318_CX_CTRL_MASTER_MODE_M2R_M1W (0x3 << 22)
218#define COH901318_CX_CTRL_MASTER_MODE_M1R_M2W (0x2 << 22)
219#define COH901318_CX_CTRL_MASTER_MODE_M2RW (0x1 << 22)
220#define COH901318_CX_CTRL_MASTER_MODE_M1RW (0x0 << 22)
221/* Terminal Count flag to PER enable */
222#define COH901318_CX_CTRL_TCP_ENABLE (0x01000000)
223#define COH901318_CX_CTRL_TCP_DISABLE (0x00000000)
224/* Terminal Count flags to CPU enable */
225#define COH901318_CX_CTRL_TC_IRQ_ENABLE (0x02000000)
226#define COH901318_CX_CTRL_TC_IRQ_DISABLE (0x00000000)
227/* Hand shake to peripheral */
228#define COH901318_CX_CTRL_HSP_ENABLE (0x04000000)
229#define COH901318_CX_CTRL_HSP_DISABLE (0x00000000)
230#define COH901318_CX_CTRL_HSS_ENABLE (0x08000000)
231#define COH901318_CX_CTRL_HSS_DISABLE (0x00000000)
232/* DMA mode */
233#define COH901318_CX_CTRL_DDMA_MASK (0x30000000)
234#define COH901318_CX_CTRL_DDMA_LEGACY (0x0 << 28)
235#define COH901318_CX_CTRL_DDMA_DEMAND_DMA1 (0x1 << 28)
236#define COH901318_CX_CTRL_DDMA_DEMAND_DMA2 (0x2 << 28)
237/* Primary Request Data Destination */
238#define COH901318_CX_CTRL_PRDD_MASK (0x40000000)
239#define COH901318_CX_CTRL_PRDD_DEST (0x1 << 30)
240#define COH901318_CX_CTRL_PRDD_SOURCE (0x0 << 30)
241
242/*
243 * CX_SRC_ADDR - Channel Source Address Registers 32bit (R/W)
244 */
245#define COH901318_CX_SRC_ADDR (0x0404)
246#define COH901318_CX_SRC_ADDR_SPACING (0x10)
247
248/*
249 * CX_DST_ADDR - Channel Destination Address Registers 32bit R/W
250 */
251#define COH901318_CX_DST_ADDR (0x0408)
252#define COH901318_CX_DST_ADDR_SPACING (0x10)
253
254/*
255 * CX_LNK_ADDR - Channel Link Address Registers 32bit (R/W)
256 */
257#define COH901318_CX_LNK_ADDR (0x040C)
258#define COH901318_CX_LNK_ADDR_SPACING (0x10)
259#define COH901318_CX_LNK_LINK_IMMEDIATE (0x00000001)
260#endif /* COH901318_H */