2 * linux/drivers/char/riscom8_reg.h -- RISCom/8 multiport serial driver.
6 * Definitions for RISCom/8 Async Mux card by SDL Communications, Inc.
10 * Address mapping between Cirrus Logic CD180 chip internal registers
11 * and ISA port addresses:
13 * CL-CD180 A6 A5 A4 A3 A2 A1 A0
14 * ISA A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
16 #define RC_TO_ISA(r) ((((r)&0x07)<<1) | (((r)&~0x07)<<7))
19 /* RISCom/8 On-Board Registers (assuming address translation) */
21 #define RC_RI 0x100 /* Ring Indicator Register (R/O) */
22 #define RC_DTR 0x100 /* DTR Register (W/O) */
23 #define RC_BSR 0x101 /* Board Status Register (R/O) */
24 #define RC_CTOUT 0x101 /* Clear Timeout (W/O) */
27 /* Board Status Register */
29 #define RC_BSR_TOUT 0x08 /* Hardware Timeout */
30 #define RC_BSR_RINT 0x04 /* Receiver Interrupt */
31 #define RC_BSR_TINT 0x02 /* Transmitter Interrupt */
32 #define RC_BSR_MINT 0x01 /* Modem Ctl Interrupt */
35 /* On-board oscillator frequency (in Hz) */
36 #define RC_OSCFREQ 9830400
38 /* Values of choice for Interrupt ACKs */
39 #define RC_ACK_MINT 0x81 /* goes to PILR1 */
40 #define RC_ACK_RINT 0x82 /* goes to PILR3 */
41 #define RC_ACK_TINT 0x84 /* goes to PILR2 */
43 /* Chip ID (sorry, only one chip now) */
46 /* Definitions for Cirrus Logic CL-CD180 8-port async mux chip */
48 #define CD180_NCH 8 /* Total number of channels */
49 #define CD180_TPC 16 /* Ticks per character */
50 #define CD180_NFIFO 8 /* TX FIFO size */
53 /* Global registers */
55 #define CD180_GIVR 0x40 /* Global Interrupt Vector Register */
56 #define CD180_GICR 0x41 /* Global Interrupting Channel Register */
57 #define CD180_PILR1 0x61 /* Priority Interrupt Level Register 1 */
58 #define CD180_PILR2 0x62 /* Priority Interrupt Level Register 2 */
59 #define CD180_PILR3 0x63 /* Priority Interrupt Level Register 3 */
60 #define CD180_CAR 0x64 /* Channel Access Register */
61 #define CD180_GFRCR 0x6b /* Global Firmware Revision Code Register */
62 #define CD180_PPRH 0x70 /* Prescaler Period Register High */
63 #define CD180_PPRL 0x71 /* Prescaler Period Register Low */
64 #define CD180_RDR 0x78 /* Receiver Data Register */
65 #define CD180_RCSR 0x7a /* Receiver Character Status Register */
66 #define CD180_TDR 0x7b /* Transmit Data Register */
67 #define CD180_EOIR 0x7f /* End of Interrupt Register */
70 /* Channel Registers */
72 #define CD180_CCR 0x01 /* Channel Command Register */
73 #define CD180_IER 0x02 /* Interrupt Enable Register */
74 #define CD180_COR1 0x03 /* Channel Option Register 1 */
75 #define CD180_COR2 0x04 /* Channel Option Register 2 */
76 #define CD180_COR3 0x05 /* Channel Option Register 3 */
77 #define CD180_CCSR 0x06 /* Channel Control Status Register */
78 #define CD180_RDCR 0x07 /* Receive Data Count Register */
79 #define CD180_SCHR1 0x09 /* Special Character Register 1 */
80 #define CD180_SCHR2 0x0a /* Special Character Register 2 */
81 #define CD180_SCHR3 0x0b /* Special Character Register 3 */
82 #define CD180_SCHR4 0x0c /* Special Character Register 4 */
83 #define CD180_MCOR1 0x10 /* Modem Change Option 1 Register */
84 #define CD180_MCOR2 0x11 /* Modem Change Option 2 Register */
85 #define CD180_MCR 0x12 /* Modem Change Register */
86 #define CD180_RTPR 0x18 /* Receive Timeout Period Register */
87 #define CD180_MSVR 0x28 /* Modem Signal Value Register */
88 #define CD180_RBPRH 0x31 /* Receive Baud Rate Period Register High */
89 #define CD180_RBPRL 0x32 /* Receive Baud Rate Period Register Low */
90 #define CD180_TBPRH 0x39 /* Transmit Baud Rate Period Register High */
91 #define CD180_TBPRL 0x3a /* Transmit Baud Rate Period Register Low */
94 /* Global Interrupt Vector Register (R/W) */
96 #define GIVR_ITMASK 0x07 /* Interrupt type mask */
97 #define GIVR_IT_MODEM 0x01 /* Modem Signal Change Interrupt */
98 #define GIVR_IT_TX 0x02 /* Transmit Data Interrupt */
99 #define GIVR_IT_RCV 0x03 /* Receive Good Data Interrupt */
100 #define GIVR_IT_REXC 0x07 /* Receive Exception Interrupt */
103 /* Global Interrupt Channel Register (R/W) */
105 #define GICR_CHAN 0x1c /* Channel Number Mask */
106 #define GICR_CHAN_OFF 2 /* Channel Number Offset */
109 /* Channel Address Register (R/W) */
111 #define CAR_CHAN 0x07 /* Channel Number Mask */
112 #define CAR_A7 0x08 /* A7 Address Extension (unused) */
115 /* Receive Character Status Register (R/O) */
117 #define RCSR_TOUT 0x80 /* Rx Timeout */
118 #define RCSR_SCDET 0x70 /* Special Character Detected Mask */
119 #define RCSR_NO_SC 0x00 /* No Special Characters Detected */
120 #define RCSR_SC_1 0x10 /* Special Char 1 (or 1 & 3) Detected */
121 #define RCSR_SC_2 0x20 /* Special Char 2 (or 2 & 4) Detected */
122 #define RCSR_SC_3 0x30 /* Special Char 3 Detected */
123 #define RCSR_SC_4 0x40 /* Special Char 4 Detected */
124 #define RCSR_BREAK 0x08 /* Break has been detected */
125 #define RCSR_PE 0x04 /* Parity Error */
126 #define RCSR_FE 0x02 /* Frame Error */
127 #define RCSR_OE 0x01 /* Overrun Error */
130 /* Channel Command Register (R/W) (commands in groups can be OR-ed) */
132 #define CCR_HARDRESET 0x81 /* Reset the chip */
134 #define CCR_SOFTRESET 0x80 /* Soft Channel Reset */
136 #define CCR_CORCHG1 0x42 /* Channel Option Register 1 Changed */
137 #define CCR_CORCHG2 0x44 /* Channel Option Register 2 Changed */
138 #define CCR_CORCHG3 0x48 /* Channel Option Register 3 Changed */
140 #define CCR_SSCH1 0x21 /* Send Special Character 1 */
142 #define CCR_SSCH2 0x22 /* Send Special Character 2 */
144 #define CCR_SSCH3 0x23 /* Send Special Character 3 */
146 #define CCR_SSCH4 0x24 /* Send Special Character 4 */
148 #define CCR_TXEN 0x18 /* Enable Transmitter */
149 #define CCR_RXEN 0x12 /* Enable Receiver */
151 #define CCR_TXDIS 0x14 /* Disable Transmitter */
152 #define CCR_RXDIS 0x11 /* Disable Receiver */
155 /* Interrupt Enable Register (R/W) */
157 #define IER_DSR 0x80 /* Enable interrupt on DSR change */
158 #define IER_CD 0x40 /* Enable interrupt on CD change */
159 #define IER_CTS 0x20 /* Enable interrupt on CTS change */
160 #define IER_RXD 0x10 /* Enable interrupt on Receive Data */
161 #define IER_RXSC 0x08 /* Enable interrupt on Receive Spec. Char */
162 #define IER_TXRDY 0x04 /* Enable interrupt on TX FIFO empty */
163 #define IER_TXEMPTY 0x02 /* Enable interrupt on TX completely empty */
164 #define IER_RET 0x01 /* Enable interrupt on RX Exc. Timeout */
167 /* Channel Option Register 1 (R/W) */
169 #define COR1_ODDP 0x80 /* Odd Parity */
170 #define COR1_PARMODE 0x60 /* Parity Mode mask */
171 #define COR1_NOPAR 0x00 /* No Parity */
172 #define COR1_FORCEPAR 0x20 /* Force Parity */
173 #define COR1_NORMPAR 0x40 /* Normal Parity */
174 #define COR1_IGNORE 0x10 /* Ignore Parity on RX */
175 #define COR1_STOPBITS 0x0c /* Number of Stop Bits */
176 #define COR1_1SB 0x00 /* 1 Stop Bit */
177 #define COR1_15SB 0x04 /* 1.5 Stop Bits */
178 #define COR1_2SB 0x08 /* 2 Stop Bits */
179 #define COR1_CHARLEN 0x03 /* Character Length */
180 #define COR1_5BITS 0x00 /* 5 bits */
181 #define COR1_6BITS 0x01 /* 6 bits */
182 #define COR1_7BITS 0x02 /* 7 bits */
183 #define COR1_8BITS 0x03 /* 8 bits */
186 /* Channel Option Register 2 (R/W) */
188 #define COR2_IXM 0x80 /* Implied XON mode */
189 #define COR2_TXIBE 0x40 /* Enable In-Band (XON/XOFF) Flow Control */
190 #define COR2_ETC 0x20 /* Embedded Tx Commands Enable */
191 #define COR2_LLM 0x10 /* Local Loopback Mode */
192 #define COR2_RLM 0x08 /* Remote Loopback Mode */
193 #define COR2_RTSAO 0x04 /* RTS Automatic Output Enable */
194 #define COR2_CTSAE 0x02 /* CTS Automatic Enable */
195 #define COR2_DSRAE 0x01 /* DSR Automatic Enable */
198 /* Channel Option Register 3 (R/W) */
200 #define COR3_XONCH 0x80 /* XON is a pair of characters (1 & 3) */
201 #define COR3_XOFFCH 0x40 /* XOFF is a pair of characters (2 & 4) */
202 #define COR3_FCT 0x20 /* Flow-Control Transparency Mode */
203 #define COR3_SCDE 0x10 /* Special Character Detection Enable */
204 #define COR3_RXTH 0x0f /* RX FIFO Threshold value (1-8) */
207 /* Channel Control Status Register (R/O) */
209 #define CCSR_RXEN 0x80 /* Receiver Enabled */
210 #define CCSR_RXFLOFF 0x40 /* Receive Flow Off (XOFF was sent) */
211 #define CCSR_RXFLON 0x20 /* Receive Flow On (XON was sent) */
212 #define CCSR_TXEN 0x08 /* Transmitter Enabled */
213 #define CCSR_TXFLOFF 0x04 /* Transmit Flow Off (got XOFF) */
214 #define CCSR_TXFLON 0x02 /* Transmit Flow On (got XON) */
217 /* Modem Change Option Register 1 (R/W) */
219 #define MCOR1_DSRZD 0x80 /* Detect 0->1 transition of DSR */
220 #define MCOR1_CDZD 0x40 /* Detect 0->1 transition of CD */
221 #define MCOR1_CTSZD 0x20 /* Detect 0->1 transition of CTS */
222 #define MCOR1_DTRTH 0x0f /* Auto DTR flow control Threshold (1-8) */
223 #define MCOR1_NODTRFC 0x0 /* Automatic DTR flow control disabled */
226 /* Modem Change Option Register 2 (R/W) */
228 #define MCOR2_DSROD 0x80 /* Detect 1->0 transition of DSR */
229 #define MCOR2_CDOD 0x40 /* Detect 1->0 transition of CD */
230 #define MCOR2_CTSOD 0x20 /* Detect 1->0 transition of CTS */
233 /* Modem Change Register (R/W) */
235 #define MCR_DSRCHG 0x80 /* DSR Changed */
236 #define MCR_CDCHG 0x40 /* CD Changed */
237 #define MCR_CTSCHG 0x20 /* CTS Changed */
240 /* Modem Signal Value Register (R/W) */
242 #define MSVR_DSR 0x80 /* Current state of DSR input */
243 #define MSVR_CD 0x40 /* Current state of CD input */
244 #define MSVR_CTS 0x20 /* Current state of CTS input */
245 #define MSVR_DTR 0x02 /* Current state of DTR output */
246 #define MSVR_RTS 0x01 /* Current state of RTS output */
249 /* Escape characters */
251 #define CD180_C_ESC 0x00 /* Escape character */
252 #define CD180_C_SBRK 0x81 /* Start sending BREAK */
253 #define CD180_C_DELAY 0x82 /* Delay output */
254 #define CD180_C_EBRK 0x83 /* Stop sending BREAK */
