aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-davinci/include/mach/edma.h
blob: 3c7dc2db70e4c118b0ad3425121932bacdabb5e9 (plain) (blame)
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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
/*
 *  TI DAVINCI dma definitions
 *
 *  Copyright (C) 2006-2009 Texas Instruments.
 *
 *  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.
 *
 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  You should have received a copy of the  GNU General Public License along
 *  with this program; if not, write  to the Free Software Foundation, Inc.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

/*
 * This EDMA3 programming framework exposes two basic kinds of resource:
 *
 *  Channel	Triggers transfers, usually from a hardware event but
 *		also manually or by "chaining" from DMA completions.
 *		Each channel is coupled to a Parameter RAM (PaRAM) slot.
 *
 *  Slot	Each PaRAM slot holds a DMA transfer descriptor (PaRAM
 *		"set"), source and destination addresses, a link to a
 *		next PaRAM slot (if any), options for the transfer, and
 *		instructions for updating those addresses.  There are
 *		more than twice as many slots as event channels.
 *
 * Each PaRAM set describes a sequence of transfers, either for one large
 * buffer or for several discontiguous smaller buffers.  An EDMA transfer
 * is driven only from a channel, which performs the transfers specified
 * in its PaRAM slot until there are no more transfers.  When that last
 * transfer completes, the "link" field may be used to reload the channel's
 * PaRAM slot with a new transfer descriptor.
 *
 * The EDMA Channel Controller (CC) maps requests from channels into physical
 * Transfer Controller (TC) requests when the channel triggers (by hardware
 * or software events, or by chaining).  The two physical DMA channels provided
 * by the TCs are thus shared by many logical channels.
 *
 * DaVinci hardware also has a "QDMA" mechanism which is not currently
 * supported through this interface.  (DSP firmware uses it though.)
 */

#ifndef EDMA_H_
#define EDMA_H_

/* PaRAM slots are laid out like this */
struct edmacc_param {
	unsigned int opt;
	unsigned int src;
	unsigned int a_b_cnt;
	unsigned int dst;
	unsigned int src_dst_bidx;
	unsigned int link_bcntrld;
	unsigned int src_dst_cidx;
	unsigned int ccnt;
};

#define CCINT0_INTERRUPT     16
#define CCERRINT_INTERRUPT   17
#define TCERRINT0_INTERRUPT   18
#define TCERRINT1_INTERRUPT   19

/* fields in edmacc_param.opt */
#define SAM		BIT(0)
#define DAM		BIT(1)
#define SYNCDIM		BIT(2)
#define STATIC		BIT(3)
#define EDMA_FWID	(0x07 << 8)
#define TCCMODE		BIT(11)
#define EDMA_TCC(t)	((t) << 12)
#define TCINTEN		BIT(20)
#define ITCINTEN	BIT(21)
#define TCCHEN		BIT(22)
#define ITCCHEN		BIT(23)

#define TRWORD (0x7<<2)
#define PAENTRY (0x1ff<<5)

/* Drivers should avoid using these symbolic names for dm644x
 * channels, and use platform_device IORESOURCE_DMA resources
 * instead.  (Other DaVinci chips have different peripherals
 * and thus have different DMA channel mappings.)
 */
#define DAVINCI_DMA_MCBSP_TX              2
#define DAVINCI_DMA_MCBSP_RX              3
#define DAVINCI_DMA_VPSS_HIST             4
#define DAVINCI_DMA_VPSS_H3A              5
#define DAVINCI_DMA_VPSS_PRVU             6
#define DAVINCI_DMA_VPSS_RSZ              7
#define DAVINCI_DMA_IMCOP_IMXINT          8
#define DAVINCI_DMA_IMCOP_VLCDINT         9
#define DAVINCI_DMA_IMCO_PASQINT         10
#define DAVINCI_DMA_IMCOP_DSQINT         11
#define DAVINCI_DMA_SPI_SPIX             16
#define DAVINCI_DMA_SPI_SPIR             17
#define DAVINCI_DMA_UART0_URXEVT0        18
#define DAVINCI_DMA_UART0_UTXEVT0        19
#define DAVINCI_DMA_UART1_URXEVT1        20
#define DAVINCI_DMA_UART1_UTXEVT1        21
#define DAVINCI_DMA_UART2_URXEVT2        22
#define DAVINCI_DMA_UART2_UTXEVT2        23
#define DAVINCI_DMA_MEMSTK_MSEVT         24
#define DAVINCI_DMA_MMCRXEVT             26
#define DAVINCI_DMA_MMCTXEVT             27
#define DAVINCI_DMA_I2C_ICREVT           28
#define DAVINCI_DMA_I2C_ICXEVT           29
#define DAVINCI_DMA_GPIO_GPINT0          32
#define DAVINCI_DMA_GPIO_GPINT1          33
#define DAVINCI_DMA_GPIO_GPINT2          34
#define DAVINCI_DMA_GPIO_GPINT3          35
#define DAVINCI_DMA_GPIO_GPINT4          36
#define DAVINCI_DMA_GPIO_GPINT5          37
#define DAVINCI_DMA_GPIO_GPINT6          38
#define DAVINCI_DMA_GPIO_GPINT7          39
#define DAVINCI_DMA_GPIO_GPBNKINT0       40
#define DAVINCI_DMA_GPIO_GPBNKINT1       41
#define DAVINCI_DMA_GPIO_GPBNKINT2       42
#define DAVINCI_DMA_GPIO_GPBNKINT3       43
#define DAVINCI_DMA_GPIO_GPBNKINT4       44
#define DAVINCI_DMA_TIMER0_TINT0         48
#define DAVINCI_DMA_TIMER1_TINT1         49
#define DAVINCI_DMA_TIMER2_TINT2         50
#define DAVINCI_DMA_TIMER3_TINT3         51
#define DAVINCI_DMA_PWM0                 52
#define DAVINCI_DMA_PWM1                 53
#define DAVINCI_DMA_PWM2                 54

/* DA830 specific EDMA3 information */
#define EDMA_DA830_NUM_DMACH		32
#define EDMA_DA830_NUM_TCC		32
#define EDMA_DA830_NUM_PARAMENTRY	128
#define EDMA_DA830_NUM_EVQUE		2
#define EDMA_DA830_NUM_TC		2
#define EDMA_DA830_CHMAP_EXIST		0
#define EDMA_DA830_NUM_REGIONS		4
#define DA830_DMACH2EVENT_MAP0		0x000FC03Fu
#define DA830_DMACH2EVENT_MAP1		0x00000000u
#define DA830_EDMA_ARM_OWN		0x30FFCCFFu

/* DA830 specific EDMA3 Events Information */
enum DA830_edma_ch {
	DA830_DMACH_MCASP0_RX,
	DA830_DMACH_MCASP0_TX,
	DA830_DMACH_MCASP1_RX,
	DA830_DMACH_MCASP1_TX,
	DA830_DMACH_MCASP2_RX,
	DA830_DMACH_MCASP2_TX,
	DA830_DMACH_GPIO_BNK0INT,
	DA830_DMACH_GPIO_BNK1INT,
	DA830_DMACH_UART0_RX,
	DA830_DMACH_UART0_TX,
	DA830_DMACH_TMR64P0_EVTOUT12,
	DA830_DMACH_TMR64P0_EVTOUT34,
	DA830_DMACH_UART1_RX,
	DA830_DMACH_UART1_TX,
	DA830_DMACH_SPI0_RX,
	DA830_DMACH_SPI0_TX,
	DA830_DMACH_MMCSD_RX,
	DA830_DMACH_MMCSD_TX,
	DA830_DMACH_SPI1_RX,
	DA830_DMACH_SPI1_TX,
	DA830_DMACH_DMAX_EVTOUT6,
	DA830_DMACH_DMAX_EVTOUT7,
	DA830_DMACH_GPIO_BNK2INT,
	DA830_DMACH_GPIO_BNK3INT,
	DA830_DMACH_I2C0_RX,
	DA830_DMACH_I2C0_TX,
	DA830_DMACH_I2C1_RX,
	DA830_DMACH_I2C1_TX,
	DA830_DMACH_GPIO_BNK4INT,
	DA830_DMACH_GPIO_BNK5INT,
	DA830_DMACH_UART2_RX,
	DA830_DMACH_UART2_TX
};

/*ch_status paramater of callback function possible values*/
#define DMA_COMPLETE 1
#define DMA_CC_ERROR 2
#define DMA_TC1_ERROR 3
#define DMA_TC2_ERROR 4

enum address_mode {
	INCR = 0,
	FIFO = 1
};

enum fifo_width {
	W8BIT = 0,
	W16BIT = 1,
	W32BIT = 2,
	W64BIT = 3,
	W128BIT = 4,
	W256BIT = 5
};

enum dma_event_q {
	EVENTQ_0 = 0,
	EVENTQ_1 = 1,
	EVENTQ_2 = 2,
	EVENTQ_3 = 3,
	EVENTQ_DEFAULT = -1
};

enum sync_dimension {
	ASYNC = 0,
	ABSYNC = 1
};

#define EDMA_CTLR_CHAN(ctlr, chan)	(((ctlr) << 16) | (chan))
#define EDMA_CTLR(i)			((i) >> 16)
#define EDMA_CHAN_SLOT(i)		((i) & 0xffff)

#define EDMA_CHANNEL_ANY		-1	/* for edma_alloc_channel() */
#define EDMA_SLOT_ANY			-1	/* for edma_alloc_slot() */

/* alloc/free DMA channels and their dedicated parameter RAM slots */
int edma_alloc_channel(int channel,
	void (*callback)(unsigned channel, u16 ch_status, void *data),
	void *data, enum dma_event_q);
void edma_free_channel(unsigned channel);

/* alloc/free parameter RAM slots */
int edma_alloc_slot(unsigned ctlr, int slot);
void edma_free_slot(unsigned slot);

/* calls that operate on part of a parameter RAM slot */
void edma_set_src(unsigned slot, dma_addr_t src_port,
				enum address_mode mode, enum fifo_width);
void edma_set_dest(unsigned slot, dma_addr_t dest_port,
				 enum address_mode mode, enum fifo_width);
void edma_get_position(unsigned slot, dma_addr_t *src, dma_addr_t *dst);
void edma_set_src_index(unsigned slot, s16 src_bidx, s16 src_cidx);
void edma_set_dest_index(unsigned slot, s16 dest_bidx, s16 dest_cidx);
void edma_set_transfer_params(unsigned slot, u16 acnt, u16 bcnt, u16 ccnt,
		u16 bcnt_rld, enum sync_dimension sync_mode);
void edma_link(unsigned from, unsigned to);
void edma_unlink(unsigned from);

/* calls that operate on an entire parameter RAM slot */
void edma_write_slot(unsigned slot, const struct edmacc_param *params);
void edma_read_slot(unsigned slot, struct edmacc_param *params);

/* channel control operations */
int edma_start(unsigned channel);
void edma_stop(unsigned channel);
void edma_clean_channel(unsigned channel);
void edma_clear_event(unsigned channel);
void edma_pause(unsigned channel);
void edma_resume(unsigned channel);

/* platform_data for EDMA driver */
struct edma_soc_info {

	/* how many dma resources of each type */
	unsigned	n_channel;
	unsigned	n_region;
	unsigned	n_slot;
	unsigned	n_tc;
	unsigned	n_cc;
	enum dma_event_q	default_queue;

	/* list of channels with no even trigger; terminated by "-1" */
	const s8	*noevent;
	const s8	(*queue_tc_mapping)[2];
	const s8	(*queue_priority_mapping)[2];
};

#endif