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bf5xx-sport.h
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1 /*
2  * File: bf5xx_sport.h
3  * Based on:
4  * Author: Roy Huang <[email protected]>
5  *
6  * Created:
7  * Description:
8  *
9  * Copyright 2004-2007 Analog Devices Inc.
10  *
11  * Bugs: Enter bugs at http://blackfin.uclinux.org/
12  *
13  * This program is free software; you can redistribute it and/or modify
14  * it under the terms of the GNU General Public License as published by
15  * the Free Software Foundation; either version 2 of the License, or
16  * (at your option) any later version.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21  * GNU General Public License for more details.
22  *
23  * You should have received a copy of the GNU General Public License
24  * along with this program; if not, see the file COPYING, or write
25  * to the Free Software Foundation, Inc.,
26  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
27  */
28 
29 
30 #ifndef __BF5XX_SPORT_H__
31 #define __BF5XX_SPORT_H__
32 
33 #include <linux/types.h>
34 #include <linux/wait.h>
35 #include <linux/workqueue.h>
36 #include <linux/platform_device.h>
37 #include <asm/dma.h>
38 #include <asm/bfin_sport.h>
39 
40 #define DESC_ELEMENT_COUNT 9
41 
42 struct sport_device {
43  int num;
44  int dma_rx_chan;
45  int dma_tx_chan;
46  int err_irq;
47  const unsigned short *pin_req;
48  struct sport_register *regs;
49 
50  unsigned char *rx_buf;
51  unsigned char *tx_buf;
52  unsigned int rx_fragsize;
53  unsigned int tx_fragsize;
54  unsigned int rx_frags;
55  unsigned int tx_frags;
56  unsigned int wdsize;
57 
58  /* for dummy dma transfer */
59  void *dummy_buf;
60  unsigned int dummy_count;
61 
62  /* DMA descriptor ring head of current audio stream*/
63  struct dmasg *dma_rx_desc;
64  struct dmasg *dma_tx_desc;
65  unsigned int rx_desc_bytes;
66  unsigned int tx_desc_bytes;
67 
68  unsigned int rx_run:1; /* rx is running */
69  unsigned int tx_run:1; /* tx is running */
70 
71  struct dmasg *dummy_rx_desc;
72  struct dmasg *dummy_tx_desc;
73 
74  struct dmasg *curr_rx_desc;
75  struct dmasg *curr_tx_desc;
76 
77  int rx_curr_frag;
78  int tx_curr_frag;
79 
80  unsigned int rcr1;
81  unsigned int rcr2;
82  int rx_tdm_count;
83 
84  unsigned int tcr1;
85  unsigned int tcr2;
86  int tx_tdm_count;
87 
88  void (*rx_callback)(void *data);
89  void *rx_data;
90  void (*tx_callback)(void *data);
91  void *tx_data;
92  void (*err_callback)(void *data);
93  void *err_data;
94  unsigned char *tx_dma_buf;
95  unsigned char *rx_dma_buf;
96 #ifdef CONFIG_SND_BF5XX_MMAP_SUPPORT
97  dma_addr_t tx_dma_phy;
98  dma_addr_t rx_dma_phy;
99  int tx_pos;/*pcm sample count*/
100  int rx_pos;
101  unsigned int tx_buffer_size;
102  unsigned int rx_buffer_size;
103  int tx_delay_pos;
104  int once;
105 #endif
106  void *private_data;
107 };
108 
109 struct sport_param {
110  int num;
111  int dma_rx_chan;
112  int dma_tx_chan;
113  int err_irq;
114  const unsigned short *pin_req;
115  struct sport_register *regs;
116  unsigned int wdsize;
117  unsigned int dummy_count;
118  void *private_data;
119 };
120 
121 struct sport_device *sport_init(struct platform_device *pdev,
122  unsigned int wdsize, unsigned int dummy_count, size_t priv_size);
123 
124 void sport_done(struct sport_device *sport);
125 
126 /* first use these ...*/
127 
128 /* note: multichannel is in units of 8 channels, tdm_count is number of channels
129  * NOT / 8 ! all channels are enabled by default */
130 int sport_set_multichannel(struct sport_device *sport, int tdm_count,
131  u32 mask, int packed);
132 
133 int sport_config_rx(struct sport_device *sport,
134  unsigned int rcr1, unsigned int rcr2,
135  unsigned int clkdiv, unsigned int fsdiv);
136 
137 int sport_config_tx(struct sport_device *sport,
138  unsigned int tcr1, unsigned int tcr2,
139  unsigned int clkdiv, unsigned int fsdiv);
140 
141 /* ... then these: */
142 
143 /* buffer size (in bytes) == fragcount * fragsize_bytes */
144 
145 /* this is not a very general api, it sets the dma to 2d autobuffer mode */
146 
147 int sport_config_rx_dma(struct sport_device *sport, void *buf,
148  int fragcount, size_t fragsize_bytes);
149 
150 int sport_config_tx_dma(struct sport_device *sport, void *buf,
151  int fragcount, size_t fragsize_bytes);
152 
153 int sport_tx_start(struct sport_device *sport);
154 int sport_tx_stop(struct sport_device *sport);
155 int sport_rx_start(struct sport_device *sport);
156 int sport_rx_stop(struct sport_device *sport);
157 
158 /* for use in interrupt handler */
159 unsigned long sport_curr_offset_rx(struct sport_device *sport);
160 unsigned long sport_curr_offset_tx(struct sport_device *sport);
161 
162 void sport_incfrag(struct sport_device *sport, int *frag, int tx);
163 void sport_decfrag(struct sport_device *sport, int *frag, int tx);
164 
165 int sport_set_rx_callback(struct sport_device *sport,
166  void (*rx_callback)(void *), void *rx_data);
167 int sport_set_tx_callback(struct sport_device *sport,
168  void (*tx_callback)(void *), void *tx_data);
169 int sport_set_err_callback(struct sport_device *sport,
170  void (*err_callback)(void *), void *err_data);
171 
172 int sport_send_and_recv(struct sport_device *sport, u8 *out_data, \
173  u8 *in_data, int len);
174 #endif /* BF53X_SPORT_H */
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