linux/drivers/net/wan/hd64570.h
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   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __HD64570_H
   3#define __HD64570_H
   4
   5/* SCA HD64570 register definitions - all addresses for mode 0 (8086 MPU)
   6   and 1 (64180 MPU). For modes 2 and 3, XOR the address with 0x01.
   7
   8   Source: HD64570 SCA User's Manual
   9*/
  10
  11
  12
  13/* SCA Control Registers */
  14#define LPR    0x00             /* Low Power */
  15
  16/* Wait controller registers */
  17#define PABR0  0x02             /* Physical Address Boundary 0 */
  18#define PABR1  0x03             /* Physical Address Boundary 1 */
  19#define WCRL   0x04             /* Wait Control L */
  20#define WCRM   0x05             /* Wait Control M */
  21#define WCRH   0x06             /* Wait Control H */
  22
  23#define PCR    0x08             /* DMA Priority Control */
  24#define DMER   0x09             /* DMA Master Enable */
  25
  26
  27/* Interrupt registers */
  28#define ISR0   0x10             /* Interrupt Status 0  */
  29#define ISR1   0x11             /* Interrupt Status 1  */
  30#define ISR2   0x12             /* Interrupt Status 2  */
  31
  32#define IER0   0x14             /* Interrupt Enable 0  */
  33#define IER1   0x15             /* Interrupt Enable 1  */
  34#define IER2   0x16             /* Interrupt Enable 2  */
  35
  36#define ITCR   0x18             /* Interrupt Control */
  37#define IVR    0x1A             /* Interrupt Vector */
  38#define IMVR   0x1C             /* Interrupt Modified Vector */
  39
  40
  41
  42/* MSCI channel (port) 0 registers - offset 0x20
  43   MSCI channel (port) 1 registers - offset 0x40 */
  44
  45#define MSCI0_OFFSET 0x20
  46#define MSCI1_OFFSET 0x40
  47
  48#define TRBL   0x00             /* TX/RX buffer L */ 
  49#define TRBH   0x01             /* TX/RX buffer H */ 
  50#define ST0    0x02             /* Status 0 */
  51#define ST1    0x03             /* Status 1 */
  52#define ST2    0x04             /* Status 2 */
  53#define ST3    0x05             /* Status 3 */
  54#define FST    0x06             /* Frame Status  */
  55#define IE0    0x08             /* Interrupt Enable 0 */
  56#define IE1    0x09             /* Interrupt Enable 1 */
  57#define IE2    0x0A             /* Interrupt Enable 2 */
  58#define FIE    0x0B             /* Frame Interrupt Enable  */
  59#define CMD    0x0C             /* Command */
  60#define MD0    0x0E             /* Mode 0 */
  61#define MD1    0x0F             /* Mode 1 */
  62#define MD2    0x10             /* Mode 2 */
  63#define CTL    0x11             /* Control */
  64#define SA0    0x12             /* Sync/Address 0 */
  65#define SA1    0x13             /* Sync/Address 1 */
  66#define IDL    0x14             /* Idle Pattern */
  67#define TMC    0x15             /* Time Constant */
  68#define RXS    0x16             /* RX Clock Source */
  69#define TXS    0x17             /* TX Clock Source */
  70#define TRC0   0x18             /* TX Ready Control 0 */ 
  71#define TRC1   0x19             /* TX Ready Control 1 */ 
  72#define RRC    0x1A             /* RX Ready Control */ 
  73#define CST0   0x1C             /* Current Status 0 */
  74#define CST1   0x1D             /* Current Status 1 */
  75
  76
  77/* Timer channel 0 (port 0 RX) registers - offset 0x60
  78   Timer channel 1 (port 0 TX) registers - offset 0x68
  79   Timer channel 2 (port 1 RX) registers - offset 0x70
  80   Timer channel 3 (port 1 TX) registers - offset 0x78
  81*/
  82
  83#define TIMER0RX_OFFSET 0x60
  84#define TIMER0TX_OFFSET 0x68
  85#define TIMER1RX_OFFSET 0x70
  86#define TIMER1TX_OFFSET 0x78
  87
  88#define TCNTL  0x00             /* Up-counter L */
  89#define TCNTH  0x01             /* Up-counter H */
  90#define TCONRL 0x02             /* Constant L */
  91#define TCONRH 0x03             /* Constant H */
  92#define TCSR   0x04             /* Control/Status */
  93#define TEPR   0x05             /* Expand Prescale */
  94
  95
  96
  97/* DMA channel 0 (port 0 RX) registers - offset 0x80
  98   DMA channel 1 (port 0 TX) registers - offset 0xA0
  99   DMA channel 2 (port 1 RX) registers - offset 0xC0
 100   DMA channel 3 (port 1 TX) registers - offset 0xE0
 101*/
 102
 103#define DMAC0RX_OFFSET 0x80
 104#define DMAC0TX_OFFSET 0xA0
 105#define DMAC1RX_OFFSET 0xC0
 106#define DMAC1TX_OFFSET 0xE0
 107
 108#define BARL   0x00             /* Buffer Address L (chained block) */
 109#define BARH   0x01             /* Buffer Address H (chained block) */
 110#define BARB   0x02             /* Buffer Address B (chained block) */
 111
 112#define DARL   0x00             /* RX Destination Addr L (single block) */
 113#define DARH   0x01             /* RX Destination Addr H (single block) */
 114#define DARB   0x02             /* RX Destination Addr B (single block) */
 115
 116#define SARL   0x04             /* TX Source Address L (single block) */
 117#define SARH   0x05             /* TX Source Address H (single block) */
 118#define SARB   0x06             /* TX Source Address B (single block) */
 119
 120#define CPB    0x06             /* Chain Pointer Base (chained block) */
 121
 122#define CDAL   0x08             /* Current Descriptor Addr L (chained block) */
 123#define CDAH   0x09             /* Current Descriptor Addr H (chained block) */
 124#define EDAL   0x0A             /* Error Descriptor Addr L (chained block) */
 125#define EDAH   0x0B             /* Error Descriptor Addr H (chained block) */
 126#define BFLL   0x0C             /* RX Receive Buffer Length L (chained block)*/
 127#define BFLH   0x0D             /* RX Receive Buffer Length H (chained block)*/
 128#define BCRL   0x0E             /* Byte Count L */
 129#define BCRH   0x0F             /* Byte Count H */
 130#define DSR    0x10             /* DMA Status */
 131#define DSR_RX(node) (DSR + (node ? DMAC1RX_OFFSET : DMAC0RX_OFFSET))
 132#define DSR_TX(node) (DSR + (node ? DMAC1TX_OFFSET : DMAC0TX_OFFSET))
 133#define DMR    0x11             /* DMA Mode */
 134#define DMR_RX(node) (DMR + (node ? DMAC1RX_OFFSET : DMAC0RX_OFFSET))
 135#define DMR_TX(node) (DMR + (node ? DMAC1TX_OFFSET : DMAC0TX_OFFSET))
 136#define FCT    0x13             /* Frame End Interrupt Counter */
 137#define FCT_RX(node) (FCT + (node ? DMAC1RX_OFFSET : DMAC0RX_OFFSET))
 138#define FCT_TX(node) (FCT + (node ? DMAC1TX_OFFSET : DMAC0TX_OFFSET))
 139#define DIR    0x14             /* DMA Interrupt Enable */
 140#define DIR_RX(node) (DIR + (node ? DMAC1RX_OFFSET : DMAC0RX_OFFSET))
 141#define DIR_TX(node) (DIR + (node ? DMAC1TX_OFFSET : DMAC0TX_OFFSET))
 142#define DCR    0x15             /* DMA Command  */
 143#define DCR_RX(node) (DCR + (node ? DMAC1RX_OFFSET : DMAC0RX_OFFSET))
 144#define DCR_TX(node) (DCR + (node ? DMAC1TX_OFFSET : DMAC0TX_OFFSET))
 145
 146
 147
 148
 149/* Descriptor Structure */
 150
 151typedef struct {
 152        u16 cp;                 /* Chain Pointer */
 153        u32 bp;                 /* Buffer Pointer (24 bits) */
 154        u16 len;                /* Data Length */
 155        u8 stat;                /* Status */
 156        u8 unused;              /* pads to 2-byte boundary */
 157}__packed pkt_desc;
 158
 159
 160/* Packet Descriptor Status bits */
 161
 162#define ST_TX_EOM     0x80      /* End of frame */
 163#define ST_TX_EOT     0x01      /* End of transmission */
 164
 165#define ST_RX_EOM     0x80      /* End of frame */
 166#define ST_RX_SHORT   0x40      /* Short frame */
 167#define ST_RX_ABORT   0x20      /* Abort */
 168#define ST_RX_RESBIT  0x10      /* Residual bit */
 169#define ST_RX_OVERRUN 0x08      /* Overrun */
 170#define ST_RX_CRC     0x04      /* CRC */
 171
 172#define ST_ERROR_MASK 0x7C
 173
 174#define DIR_EOTE      0x80      /* Transfer completed */
 175#define DIR_EOME      0x40      /* Frame Transfer Completed (chained-block) */
 176#define DIR_BOFE      0x20      /* Buffer Overflow/Underflow (chained-block)*/
 177#define DIR_COFE      0x10      /* Counter Overflow (chained-block) */
 178
 179
 180#define DSR_EOT       0x80      /* Transfer completed */
 181#define DSR_EOM       0x40      /* Frame Transfer Completed (chained-block) */
 182#define DSR_BOF       0x20      /* Buffer Overflow/Underflow (chained-block)*/
 183#define DSR_COF       0x10      /* Counter Overflow (chained-block) */
 184#define DSR_DE        0x02      /* DMA Enable */
 185#define DSR_DWE       0x01      /* DMA Write Disable */
 186
 187/* DMA Master Enable Register (DMER) bits */
 188#define DMER_DME      0x80      /* DMA Master Enable */
 189
 190
 191#define CMD_RESET     0x21      /* Reset Channel */
 192#define CMD_TX_ENABLE 0x02      /* Start transmitter */
 193#define CMD_RX_ENABLE 0x12      /* Start receiver */
 194
 195#define MD0_HDLC      0x80      /* Bit-sync HDLC mode */
 196#define MD0_CRC_ENA   0x04      /* Enable CRC code calculation */
 197#define MD0_CRC_CCITT 0x02      /* CCITT CRC instead of CRC-16 */
 198#define MD0_CRC_PR1   0x01      /* Initial all-ones instead of all-zeros */
 199
 200#define MD0_CRC_NONE  0x00
 201#define MD0_CRC_16_0  0x04
 202#define MD0_CRC_16    0x05
 203#define MD0_CRC_ITU_0 0x06
 204#define MD0_CRC_ITU   0x07
 205
 206#define MD2_NRZ       0x00
 207#define MD2_NRZI      0x20
 208#define MD2_MANCHESTER 0x80
 209#define MD2_FM_MARK   0xA0
 210#define MD2_FM_SPACE  0xC0
 211#define MD2_LOOPBACK  0x03      /* Local data Loopback */
 212
 213#define CTL_NORTS     0x01
 214#define CTL_IDLE      0x10      /* Transmit an idle pattern */
 215#define CTL_UDRNC     0x20      /* Idle after CRC or FCS+flag transmission */
 216
 217#define ST0_TXRDY     0x02      /* TX ready */
 218#define ST0_RXRDY     0x01      /* RX ready */
 219
 220#define ST1_UDRN      0x80      /* MSCI TX underrun */
 221#define ST1_CDCD      0x04      /* DCD level changed */
 222
 223#define ST3_CTS       0x08      /* modem input - /CTS */
 224#define ST3_DCD       0x04      /* modem input - /DCD */
 225
 226#define IE0_TXINT     0x80      /* TX INT MSCI interrupt enable */
 227#define IE0_RXINTA    0x40      /* RX INT A MSCI interrupt enable */
 228#define IE1_UDRN      0x80      /* TX underrun MSCI interrupt enable */
 229#define IE1_CDCD      0x04      /* DCD level changed */
 230
 231#define DCR_ABORT     0x01      /* Software abort command */
 232#define DCR_CLEAR_EOF 0x02      /* Clear EOF interrupt */
 233
 234/* TX and RX Clock Source - RXS and TXS */
 235#define CLK_BRG_MASK  0x0F
 236#define CLK_LINE_RX   0x00      /* TX/RX clock line input */
 237#define CLK_LINE_TX   0x00      /* TX/RX line input */
 238#define CLK_BRG_RX    0x40      /* internal baud rate generator */
 239#define CLK_BRG_TX    0x40      /* internal baud rate generator */
 240#define CLK_RXCLK_TX  0x60      /* TX clock from RX clock */
 241
 242#endif
 243
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