aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/irda/nsc-ircc.h
blob: bbdc97ff83cae11df92933f9cb7cb4b55cef2f5e (plain)
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
/*********************************************************************
 *                
 * Filename:      nsc-ircc.h
 * Version:       
 * Description:   
 * Status:        Experimental.
 * Author:        Dag Brattli <dagb@cs.uit.no>
 * Created at:    Fri Nov 13 14:37:40 1998
 * Modified at:   Sun Jan 23 17:47:00 2000
 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 * 
 *     Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no>
 *     Copyright (c) 1998 Lichen Wang, <lwang@actisys.com>
 *     Copyright (c) 1998 Actisys Corp., www.actisys.com
 *     All Rights Reserved
 *      
 *     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.
 *  
 *     Neither Dag Brattli nor University of Tromsø admit liability nor
 *     provide warranty for any of this software. This material is 
 *     provided "AS-IS" and at no charge.
 *     
 ********************************************************************/

#ifndef NSC_IRCC_H
#define NSC_IRCC_H

#include <linux/time.h>

#include <linux/spinlock.h>
#include <linux/pm.h>
#include <linux/types.h>
#include <asm/io.h>

/* DMA modes needed */
#define DMA_TX_MODE     0x08    /* Mem to I/O, ++, demand. */
#define DMA_RX_MODE     0x04    /* I/O to mem, ++, demand. */

/* Config registers for the '108 */
#define CFG_108_BAIC 0x00
#define CFG_108_CSRT 0x01
#define CFG_108_MCTL 0x02

/* Config registers for the '338 */
#define CFG_338_FER  0x00
#define CFG_338_FAR  0x01
#define CFG_338_PTR  0x02
#define CFG_338_PNP0 0x1b
#define CFG_338_PNP1 0x1c
#define CFG_338_PNP3 0x4f

/* Config registers for the '39x (in the logical device bank) */
#define CFG_39X_LDN	0x07	/* Logical device number (Super I/O bank) */
#define CFG_39X_SIOCF1	0x21	/* SuperI/O Config */
#define CFG_39X_ACT	0x30	/* Device activation */
#define CFG_39X_BASEH	0x60	/* Device base address (high bits) */
#define CFG_39X_BASEL	0x61	/* Device base address (low bits) */
#define CFG_39X_IRQNUM	0x70	/* Interrupt number & wake up enable */
#define CFG_39X_IRQSEL	0x71	/* Interrupt select (edge/level + polarity) */
#define CFG_39X_DMA0	0x74	/* DMA 0 configuration */
#define CFG_39X_DMA1	0x75	/* DMA 1 configuration */
#define CFG_39X_SPC	0xF0	/* Serial port configuration register */

/* Flags for configuration register CRF0 */
#define APEDCRC		0x02
#define ENBNKSEL	0x01

/* Set 0 */
#define TXD             0x00 /* Transmit data port */
#define RXD             0x00 /* Receive data port */

/* Register 1 */
#define IER		0x01 /* Interrupt Enable Register*/
#define IER_RXHDL_IE    0x01 /* Receiver high data level interrupt */
#define IER_TXLDL_IE    0x02 /* Transeiver low data level interrupt */
#define IER_LS_IE	0x04//* Link Status Interrupt */
#define IER_ETXURI      0x04 /* Tx underrun */
#define IER_DMA_IE	0x10 /* DMA finished interrupt */
#define IER_TXEMP_IE    0x20
#define IER_SFIF_IE     0x40 /* Frame status FIFO intr */
#define IER_TMR_IE      0x80 /* Timer event */

#define FCR		0x02 /* (write only) */
#define FCR_FIFO_EN     0x01 /* Enable FIFO's */
#define FCR_RXSR        0x02 /* Rx FIFO soft reset */
#define FCR_TXSR        0x04 /* Tx FIFO soft reset */
#define FCR_RXTH	0x40 /* Rx FIFO threshold (set to 16) */
#define FCR_TXTH	0x20 /* Tx FIFO threshold (set to 17) */

#define EIR		0x02 /* (read only) */
#define EIR_RXHDL_EV	0x01
#define EIR_TXLDL_EV    0x02
#define EIR_LS_EV	0x04
#define EIR_DMA_EV	0x10
#define EIR_TXEMP_EV	0x20
#define EIR_SFIF_EV     0x40
#define EIR_TMR_EV      0x80

#define LCR             0x03 /* Link control register */
#define LCR_WLS_8       0x03 /* 8 bits */

#define BSR 	        0x03 /* Bank select register */
#define BSR_BKSE        0x80
#define BANK0 	        LCR_WLS_8 /* Must make sure that we set 8N1 */
#define BANK1	        0x80
#define BANK2	        0xe0
#define BANK3	        0xe4
#define BANK4	        0xe8
#define BANK5	        0xec
#define BANK6	        0xf0
#define BANK7     	0xf4

#define MCR		0x04 /* Mode Control Register */
#define MCR_MODE_MASK	~(0xd0)
#define MCR_UART        0x00
#define MCR_RESERVED  	0x20	
#define MCR_SHARP_IR    0x40
#define MCR_SIR         0x60
#define MCR_MIR  	0x80
#define MCR_FIR		0xa0
#define MCR_CEIR        0xb0
#define MCR_IR_PLS      0x10
#define MCR_DMA_EN	0x04
#define MCR_EN_IRQ	0x08
#define MCR_TX_DFR	0x08

#define LSR             0x05 /* Link status register */
#define LSR_RXDA        0x01 /* Receiver data available */
#define LSR_TXRDY       0x20 /* Transmitter ready */
#define LSR_TXEMP       0x40 /* Transmitter empty */

#define ASCR            0x07 /* Auxillary Status and Control Register */
#define ASCR_RXF_TOUT   0x01 /* Rx FIFO timeout */
#define ASCR_FEND_INF   0x02 /* Frame end bytes in rx FIFO */
#define ASCR_S_EOT      0x04 /* Set end of transmission */
#define ASCT_RXBSY      0x20 /* Rx busy */
#define ASCR_TXUR       0x40 /* Transeiver underrun */
#define ASCR_CTE        0x80 /* Clear timer event */

/* Bank 2 */
#define BGDL            0x00 /* Baud Generator Divisor Port (Low Byte) */
#define BGDH            0x01 /* Baud Generator Divisor Port (High Byte) */

#define ECR1		0x02 /* Extended Control Register 1 */
#define ECR1_EXT_SL	0x01 /* Extended Mode Select */
#define ECR1_DMANF	0x02 /* DMA Fairness */
#define ECR1_DMATH      0x04 /* DMA Threshold */
#define ECR1_DMASWP	0x08 /* DMA Swap */

#define EXCR2		0x04
#define EXCR2_TFSIZ	0x01 /* Rx FIFO size = 32 */
#define EXCR2_RFSIZ	0x04 /* Tx FIFO size = 32 */

#define TXFLV           0x06 /* Tx FIFO level */
#define RXFLV           0x07 /* Rx FIFO level */

/* Bank 3 */
#define MID		0x00

/* Bank 4 */
#define TMRL            0x00 /* Timer low byte */
#define TMRH            0x01 /* Timer high byte */
#define IRCR1           0x02 /* Infrared control register 1 */
#define IRCR1_TMR_EN    0x01 /* Timer enable */

#define TFRLL		0x04
#define TFRLH		0x05
#define RFRLL		0x06
#define RFRLH		0x07

/* Bank 5 */
#define IRCR2           0x04 /* Infrared control register 2 */
#define IRCR2_MDRS      0x04 /* MIR data rate select */
#define IRCR2_FEND_MD   0x20 /* */

#define FRM_ST          0x05 /* Frame status FIFO */
#define FRM_ST_VLD      0x80 /* Frame status FIFO data valid */
#define FRM_ST_ERR_MSK  0x5f
#define FRM_ST_LOST_FR  0x40 /* Frame lost */
#define FRM_ST_MAX_LEN  0x10 /* Max frame len exceeded */
#define FRM_ST_PHY_ERR  0x08 /* Physical layer error */
#define FRM_ST_BAD_CRC  0x04 
#define FRM_ST_OVR1     0x02 /* Rx FIFO overrun */
#define FRM_ST_OVR2     0x01 /* Frame status FIFO overrun */

#define RFLFL           0x06
#define RFLFH           0x07

/* Bank 6 */
#define IR_CFG2		0x00
#define IR_CFG2_DIS_CRC	0x02

/* Bank 7 */
#define IRM_CR		0x07 /* Infrared module control register */
#define IRM_CR_IRX_MSL	0x40
#define IRM_CR_AF_MNT   0x80 /* Automatic format */

/* NSC chip information */
struct nsc_chip {
	char *name;          /* Name of chipset */
	int cfg[3];          /* Config registers */
	u_int8_t cid_index;  /* Chip identification index reg */
	u_int8_t cid_value;  /* Chip identification expected value */
	u_int8_t cid_mask;   /* Chip identification revision mask */

	/* Functions for probing and initializing the specific chip */
	int (*probe)(struct nsc_chip *chip, chipio_t *info);
	int (*init)(struct nsc_chip *chip, chipio_t *info);
};
typedef struct nsc_chip nsc_chip_t;

/* For storing entries in the status FIFO */
struct st_fifo_entry {
	int status;
	int len;
};

#define MAX_TX_WINDOW 7
#define MAX_RX_WINDOW 7

struct st_fifo {
	struct st_fifo_entry entries[MAX_RX_WINDOW];
	int pending_bytes;
	int head;
	int tail;
	int len;
};

struct frame_cb {
	void *start; /* Start of frame in DMA mem */
	int len;     /* Lenght of frame in DMA mem */
};

struct tx_fifo {
	struct frame_cb queue[MAX_TX_WINDOW]; /* Info about frames in queue */
	int             ptr;                  /* Currently being sent */
	int             len;                  /* Lenght of queue */
	int             free;                 /* Next free slot */
	void           *tail;                 /* Next free start in DMA mem */
};

/* Private data for each instance */
struct nsc_ircc_cb {
	struct st_fifo st_fifo;    /* Info about received frames */
	struct tx_fifo tx_fifo;    /* Info about frames to be transmitted */

	struct net_device *netdev;     /* Yes! we are some kind of netdevice */
	struct net_device_stats stats;
	
	struct irlap_cb *irlap;    /* The link layer we are binded to */
	struct qos_info qos;       /* QoS capabilities for this device */
	
	chipio_t io;               /* IrDA controller information */
	iobuff_t tx_buff;          /* Transmit buffer */
	iobuff_t rx_buff;          /* Receive buffer */
	dma_addr_t tx_buff_dma;
	dma_addr_t rx_buff_dma;

	__u8 ier;                  /* Interrupt enable register */

	struct timeval stamp;
	struct timeval now;

	spinlock_t lock;           /* For serializing operations */
	
	__u32 new_speed;
	int index;                 /* Instance index */

	struct platform_device *pldev;
};

static inline void switch_bank(int iobase, int bank)
{
		outb(bank, iobase+BSR);
}

#endif /* NSC_IRCC_H */