tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * bfin_sport.h - userspace header for bfin sport driver
3 *
4 * Copyright 2004-2008 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9#ifndef __BFIN_SPORT_H__
10#define __BFIN_SPORT_H__
11
12#ifdef __KERNEL__
13#include <linux/cdev.h>
14#include <linux/mutex.h>
15#include <linux/sched.h>
16#include <linux/wait.h>
17#endif
18
19#define SPORT_MAJOR 237
20#define SPORT_NR_DEVS 2
21
22/* Sport mode: it can be set to TDM, i2s or others */
23#define NORM_MODE 0x0
24#define TDM_MODE 0x1
25#define I2S_MODE 0x2
26
27/* Data format, normal, a-law or u-law */
28#define NORM_FORMAT 0x0
29#define ALAW_FORMAT 0x2
30#define ULAW_FORMAT 0x3
31
32/* Function driver which use sport must initialize the structure */
33struct sport_config {
34 /* TDM (multichannels), I2S or other mode */
35 unsigned int mode:3;
36
37 /* if TDM mode is selected, channels must be set */
38 int channels; /* Must be in 8 units */
39 unsigned int frame_delay:4; /* Delay between frame sync pulse and first bit */
40
41 /* I2S mode */
42 unsigned int right_first:1; /* Right stereo channel first */
43
44 /* In mormal mode, the following item need to be set */
45 unsigned int lsb_first:1; /* order of transmit or receive data */
46 unsigned int fsync:1; /* Frame sync required */
47 unsigned int data_indep:1; /* data independent frame sync generated */
48 unsigned int act_low:1; /* Active low TFS */
49 unsigned int late_fsync:1; /* Late frame sync */
50 unsigned int tckfe:1;
51 unsigned int sec_en:1; /* Secondary side enabled */
52
53 /* Choose clock source */
54 unsigned int int_clk:1; /* Internal or external clock */
55
56 /* If external clock is used, the following fields are ignored */
57 int serial_clk;
58 int fsync_clk;
59
60 unsigned int data_format:2; /* Normal, u-law or a-law */
61
62 int word_len; /* How length of the word in bits, 3-32 bits */
63 int dma_enabled;
64};
65
66/* Userspace interface */
67#define SPORT_IOC_MAGIC 'P'
68#define SPORT_IOC_CONFIG _IOWR('P', 0x01, struct sport_config)
69
70#ifdef __KERNEL__
71
72struct sport_register {
73 unsigned short tcr1;
74 unsigned short reserved0;
75 unsigned short tcr2;
76 unsigned short reserved1;
77 unsigned short tclkdiv;
78 unsigned short reserved2;
79 unsigned short tfsdiv;
80 unsigned short reserved3;
81 unsigned long tx;
82 unsigned long reserved_l0;
83 unsigned long rx;
84 unsigned long reserved_l1;
85 unsigned short rcr1;
86 unsigned short reserved4;
87 unsigned short rcr2;
88 unsigned short reserved5;
89 unsigned short rclkdiv;
90 unsigned short reserved6;
91 unsigned short rfsdiv;
92 unsigned short reserved7;
93 unsigned short stat;
94 unsigned short reserved8;
95 unsigned short chnl;
96 unsigned short reserved9;
97 unsigned short mcmc1;
98 unsigned short reserved10;
99 unsigned short mcmc2;
100 unsigned short reserved11;
101 unsigned long mtcs0;
102 unsigned long mtcs1;
103 unsigned long mtcs2;
104 unsigned long mtcs3;
105 unsigned long mrcs0;
106 unsigned long mrcs1;
107 unsigned long mrcs2;
108 unsigned long mrcs3;
109};
110
111struct sport_dev {
112 struct cdev cdev; /* Char device structure */
113
114 int sport_num;
115
116 int dma_rx_chan;
117 int dma_tx_chan;
118
119 int rx_irq;
120 unsigned char *rx_buf; /* Buffer store the received data */
121 int rx_len; /* How many bytes will be received */
122 int rx_received; /* How many bytes has been received */
123
124 int tx_irq;
125 const unsigned char *tx_buf;
126 int tx_len;
127 int tx_sent;
128
129 int err_irq;
130
131 struct mutex mutex; /* mutual exclusion semaphore */
132 struct task_struct *task;
133
134 wait_queue_head_t waitq;
135 int wait_con;
136 struct sport_register *regs;
137 struct sport_config config;
138};
139
140#endif
141
142#define SPORT_TCR1 0
143#define SPORT_TCR2 1
144#define SPORT_TCLKDIV 2
145#define SPORT_TFSDIV 3
146#define SPORT_RCR1 8
147#define SPORT_RCR2 9
148#define SPORT_RCLKDIV 10
149#define SPORT_RFSDIV 11
150#define SPORT_CHANNEL 13
151#define SPORT_MCMC1 14
152#define SPORT_MCMC2 15
153#define SPORT_MTCS0 16
154#define SPORT_MTCS1 17
155#define SPORT_MTCS2 18
156#define SPORT_MTCS3 19
157#define SPORT_MRCS0 20
158#define SPORT_MRCS1 21
159#define SPORT_MRCS2 22
160#define SPORT_MRCS3 23
161
162#endif