drivers/net/irda/ali-ircc.h

   1 /*********************************************************************
   2  *
   3  * Filename:      ali-ircc.h
   4  * Version:       0.5
   5  * Description:   Driver for the ALI M1535D and M1543C FIR Controller
   6  * Status:        Experimental.
   7  * Author:        Benjamin Kong <benjamin_kong@ali.com.tw>
   8  * Created at:    2000/10/16 03:46PM
   9  * Modified at:   2001/1/3 02:56PM
  10  * Modified by:   Benjamin Kong <benjamin_kong@ali.com.tw>
  11  *
  12  *     Copyright (c) 2000 Benjamin Kong <benjamin_kong@ali.com.tw>
  13  *     All Rights Reserved
  14  *
  15  *     This program is free software; you can redistribute it and/or
  16  *     modify it under the terms of the GNU General Public License as
  17  *     published by the Free Software Foundation; either version 2 of
  18  *     the License, or (at your option) any later version.
  19  *
  20  ********************************************************************/
  21
  22 #ifndef ALI_IRCC_H
  23 #define ALI_IRCC_H
  24
  25 #include <linux/ktime.h>
  26
  27 #include <linux/spinlock.h>
  28 #include <linux/pm.h>
  29 #include <linux/types.h>
  30 #include <asm/io.h>
  31
  32 /* SIR Register */
  33 /* Usr definition of linux/serial_reg.h */
  34
  35 /* FIR Register */
  36 #define BANK0           0x20
  37 #define BANK1           0x21
  38 #define BANK2           0x22
  39 #define BANK3           0x23
  40
  41 #define FIR_MCR         0x07    /* Master Control Register */
  42
  43 /* Bank 0 */
  44 #define FIR_DR          0x00    /* Alias 0, FIR Data Register (R/W) */
  45 #define FIR_IER         0x01    /* Alias 1, FIR Interrupt Enable Register (R/W) */
  46 #define FIR_IIR         0x02    /* Alias 2, FIR Interrupt Identification Register (Read only) */
  47 #define FIR_LCR_A       0x03    /* Alias 3, FIR Line Control Register A (R/W) */
  48 #define FIR_LCR_B       0x04    /* Alias 4, FIR Line Control Register B (R/W) */
  49 #define FIR_LSR         0x05    /* Alias 5, FIR Line Status Register (R/W) */
  50 #define FIR_BSR         0x06    /* Alias 6, FIR Bus Status Register (Read only) */
  51
  52
  53         /* Alias 1 */
  54         #define IER_FIFO        0x10    /* FIR FIFO Interrupt Enable */
  55         #define IER_TIMER       0x20    /* Timer Interrupt Enable */
  56         #define IER_EOM         0x40    /* End of Message Interrupt Enable */
  57         #define IER_ACT         0x80    /* Active Frame Interrupt Enable */
  58
  59         /* Alias 2 */
  60         #define IIR_FIFO        0x10    /* FIR FIFO Interrupt */
  61         #define IIR_TIMER       0x20    /* Timer Interrupt */
  62         #define IIR_EOM         0x40    /* End of Message Interrupt */
  63         #define IIR_ACT         0x80    /* Active Frame Interrupt */
  64
  65         /* Alias 3 */
  66         #define LCR_A_FIFO_RESET 0x80   /* FIFO Reset */
  67
  68         /* Alias 4 */
  69         #define LCR_B_BW        0x10    /* Brick Wall */
  70         #define LCR_B_SIP       0x20    /* SIP Enable */
  71         #define LCR_B_TX_MODE   0x40    /* Transmit Mode */
  72         #define LCR_B_RX_MODE   0x80    /* Receive Mode */
  73
  74         /* Alias 5 */
  75         #define LSR_FIR_LSA     0x00    /* FIR Line Status Address */
  76         #define LSR_FRAME_ABORT 0x08    /* Frame Abort */
  77         #define LSR_CRC_ERROR   0x10    /* CRC Error */
  78         #define LSR_SIZE_ERROR  0x20    /* Size Error */
  79         #define LSR_FRAME_ERROR 0x40    /* Frame Error */
  80         #define LSR_FIFO_UR     0x80    /* FIFO Underrun */
  81         #define LSR_FIFO_OR     0x80    /* FIFO Overrun */
  82
  83         /* Alias 6 */
  84         #define BSR_FIFO_NOT_EMPTY      0x80    /* FIFO Not Empty */
  85
  86 /* Bank 1 */
  87 #define FIR_CR          0x00    /* Alias 0, FIR Configuration Register (R/W) */
  88 #define FIR_FIFO_TR     0x01    /* Alias 1, FIR FIFO Threshold Register (R/W) */
  89 #define FIR_DMA_TR      0x02    /* Alias 2, FIR DMA Threshold Register (R/W) */
  90 #define FIR_TIMER_IIR   0x03    /* Alias 3, FIR Timer interrupt interval register (W/O) */
  91 #define FIR_FIFO_FR     0x03    /* Alias 3, FIR FIFO Flag register (R/O) */
  92 #define FIR_FIFO_RAR    0x04    /* Alias 4, FIR FIFO Read Address register (R/O) */
  93 #define FIR_FIFO_WAR    0x05    /* Alias 5, FIR FIFO Write Address register (R/O) */
  94 #define FIR_TR          0x06    /* Alias 6, Test REgister (W/O) */
  95
  96         /* Alias 0 */
  97         #define CR_DMA_EN       0x01    /* DMA Enable */
  98         #define CR_DMA_BURST    0x02    /* DMA Burst Mode */
  99         #define CR_TIMER_EN     0x08    /* Timer Enable */
 100
 101         /* Alias 3 */
 102         #define TIMER_IIR_500   0x00    /* 500 us */
 103         #define TIMER_IIR_1ms   0x01    /* 1   ms */
 104         #define TIMER_IIR_2ms   0x02    /* 2   ms */
 105         #define TIMER_IIR_4ms   0x03    /* 4   ms */
 106
 107 /* Bank 2 */
 108 #define FIR_IRDA_CR     0x00    /* Alias 0, IrDA Control Register (R/W) */
 109 #define FIR_BOF_CR      0x01    /* Alias 1, BOF Count Register (R/W) */
 110 #define FIR_BW_CR       0x02    /* Alias 2, Brick Wall Count Register (R/W) */
 111 #define FIR_TX_DSR_HI   0x03    /* Alias 3, TX Data Size Register (high) (R/W) */
 112 #define FIR_TX_DSR_LO   0x04    /* Alias 4, TX Data Size Register (low) (R/W) */
 113 #define FIR_RX_DSR_HI   0x05    /* Alias 5, RX Data Size Register (high) (R/W) */
 114 #define FIR_RX_DSR_LO   0x06    /* Alias 6, RX Data Size Register (low) (R/W) */
 115
 116         /* Alias 0 */
 117         #define IRDA_CR_HDLC1152 0x80   /* 1.152Mbps HDLC Select */
 118         #define IRDA_CR_CRC     0X40    /* CRC Select. */
 119         #define IRDA_CR_HDLC    0x20    /* HDLC select. */
 120         #define IRDA_CR_HP_MODE 0x10    /* HP mode (read only) */
 121         #define IRDA_CR_SD_ST   0x08    /* SD/MODE State.  */
 122         #define IRDA_CR_FIR_SIN 0x04    /* FIR SIN Select. */
 123         #define IRDA_CR_ITTX_0  0x02    /* SOUT State. IRTX force to 0 */
 124         #define IRDA_CR_ITTX_1  0x03    /* SOUT State. IRTX force to 1 */
 125
 126 /* Bank 3 */
 127 #define FIR_ID_VR       0x00    /* Alias 0, FIR ID Version Register (R/O) */
 128 #define FIR_MODULE_CR   0x01    /* Alias 1, FIR Module Control Register (R/W) */
 129 #define FIR_IO_BASE_HI  0x02    /* Alias 2, FIR Higher I/O Base Address Register (R/O) */
 130 #define FIR_IO_BASE_LO  0x03    /* Alias 3, FIR Lower I/O Base Address Register (R/O) */
 131 #define FIR_IRQ_CR      0x04    /* Alias 4, FIR IRQ Channel Register (R/O) */
 132 #define FIR_DMA_CR      0x05    /* Alias 5, FIR DMA Channel Register (R/O) */
 133
 134 struct ali_chip {
 135         char *name;
 136         int cfg[2];
 137         unsigned char entr1;
 138         unsigned char entr2;
 139         unsigned char cid_index;
 140         unsigned char cid_value;
 141         int (*probe)(struct ali_chip *chip, chipio_t *info);
 142         int (*init)(struct ali_chip *chip, chipio_t *info);
 143 };
 144 typedef struct ali_chip ali_chip_t;
 145
 146
 147 /* DMA modes needed */
 148 #define DMA_TX_MODE     0x08    /* Mem to I/O, ++, demand. */
 149 #define DMA_RX_MODE     0x04    /* I/O to mem, ++, demand. */
 150
 151 #define MAX_TX_WINDOW   7
 152 #define MAX_RX_WINDOW   7
 153
 154 #define TX_FIFO_Threshold       8
 155 #define RX_FIFO_Threshold       1
 156 #define TX_DMA_Threshold        1
 157 #define RX_DMA_Threshold        1
 158
 159 /* For storing entries in the status FIFO */
 160
 161 struct st_fifo_entry {
 162         int status;
 163         int len;
 164 };
 165
 166 struct st_fifo {
 167         struct st_fifo_entry entries[MAX_RX_WINDOW];
 168         int pending_bytes;
 169         int head;
 170         int tail;
 171         int len;
 172 };
 173
 174 struct frame_cb {
 175         void *start; /* Start of frame in DMA mem */
 176         int len;     /* Length of frame in DMA mem */
 177 };
 178
 179 struct tx_fifo {
 180         struct frame_cb queue[MAX_TX_WINDOW]; /* Info about frames in queue */
 181         int             ptr;                  /* Currently being sent */
 182         int             len;                  /* Length of queue */
 183         int             free;                 /* Next free slot */
 184         void           *tail;                 /* Next free start in DMA mem */
 185 };
 186
 187 /* Private data for each instance */
 188 struct ali_ircc_cb {
 189
 190         struct st_fifo st_fifo;    /* Info about received frames */
 191         struct tx_fifo tx_fifo;    /* Info about frames to be transmitted */
 192
 193         struct net_device *netdev;     /* Yes! we are some kind of netdevice */
 194
 195         struct irlap_cb *irlap;    /* The link layer we are binded to */
 196         struct qos_info qos;       /* QoS capabilities for this device */
 197
 198         chipio_t io;               /* IrDA controller information */
 199         iobuff_t tx_buff;          /* Transmit buffer */
 200         iobuff_t rx_buff;          /* Receive buffer */
 201         dma_addr_t tx_buff_dma;
 202         dma_addr_t rx_buff_dma;
 203
 204         __u8 ier;                  /* Interrupt enable register */
 205
 206         __u8 InterruptID;          /* Interrupt ID */
 207         __u8 BusStatus;            /* Bus Status */
 208         __u8 LineStatus;           /* Line Status */
 209
 210         unsigned char rcvFramesOverflow;
 211
 212         ktime_t stamp;
 213
 214         spinlock_t lock;           /* For serializing operations */
 215
 216         __u32 new_speed;
 217         int index;                 /* Instance index */
 218
 219         unsigned char fifo_opti_buf;
 220 };
 221
 222 static inline void switch_bank(int iobase, int bank)
 223 {
 224                 outb(bank, iobase+FIR_MCR);
 225 }
 226
 227 #endif /* ALI_IRCC_H */