1 /* -*- linux-c -*- *
2  *
3  * ALSA driver for the digigram lx6464es interface
4  *
5  * Copyright (c) 2009 Tim Blechmann <tim@klingt.org>
6  *
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; see the file COPYING.  If not, write to
20  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21  * Boston, MA 02111-1307, USA.
22  *
23  */
24 
25 #ifndef LX6464ES_H
26 #define LX6464ES_H
27 
28 #include <linux/spinlock.h>
29 #include <linux/atomic.h>
30 
31 #include <sound/core.h>
32 #include <sound/pcm.h>
33 
34 #include "lx_core.h"
35 
36 #define LXP "LX6464ES: "
37 
38 enum {
39     ES_cmd_free         = 0,    /* no command executing */
40     ES_cmd_processing   = 1,	/* execution of a read/write command */
41     ES_read_pending     = 2,    /* a asynchron read command is pending */
42     ES_read_finishing   = 3,    /* a read command has finished waiting (set by
43 				 * Interrupt or CancelIrp) */
44 };
45 
46 enum lx_stream_status {
47 	LX_STREAM_STATUS_FREE,
48 /* 	LX_STREAM_STATUS_OPEN, */
49 	LX_STREAM_STATUS_SCHEDULE_RUN,
50 /* 	LX_STREAM_STATUS_STARTED, */
51 	LX_STREAM_STATUS_RUNNING,
52 	LX_STREAM_STATUS_SCHEDULE_STOP,
53 /* 	LX_STREAM_STATUS_STOPPED, */
54 /* 	LX_STREAM_STATUS_PAUSED */
55 };
56 
57 
58 struct lx_stream {
59 	struct snd_pcm_substream  *stream;
60 	snd_pcm_uframes_t          frame_pos;
61 	enum lx_stream_status      status; /* free, open, running, draining
62 					    * pause */
63 	unsigned int               is_capture:1;
64 };
65 
66 
67 struct lx6464es {
68 	struct snd_card        *card;
69 	struct pci_dev         *pci;
70 	int			irq;
71 
72 	u8			mac_address[6];
73 
74 	spinlock_t		lock;        /* interrupt spinlock */
75 	struct mutex            setup_mutex; /* mutex used in hw_params, open
76 					      * and close */
77 
78 	struct tasklet_struct   trigger_tasklet; /* trigger tasklet */
79 	struct tasklet_struct   tasklet_capture;
80 	struct tasklet_struct   tasklet_playback;
81 
82 	/* ports */
83 	unsigned long		port_plx;	   /* io port (size=256) */
84 	void __iomem           *port_plx_remapped; /* remapped plx port */
85 	void __iomem           *port_dsp_bar;      /* memory port (32-bit,
86 						    * non-prefetchable,
87 						    * size=8K) */
88 
89 	/* messaging */
90 	spinlock_t		msg_lock;          /* message spinlock */
91 	struct lx_rmh           rmh;
92 
93 	/* configuration */
94 	uint			freq_ratio : 2;
95 	uint                    playback_mute : 1;
96 	uint                    hardware_running[2];
97 	u32                     board_sample_rate; /* sample rate read from
98 						    * board */
99 	u16                     pcm_granularity;   /* board blocksize */
100 
101 	/* dma */
102 	struct snd_dma_buffer   capture_dma_buf;
103 	struct snd_dma_buffer   playback_dma_buf;
104 
105 	/* pcm */
106 	struct snd_pcm         *pcm;
107 
108 	/* streams */
109 	struct lx_stream        capture_stream;
110 	struct lx_stream        playback_stream;
111 };
112 
113 
114 #endif /* LX6464ES_H */
115