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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * include/linux/serial_reg.h
3 *
4 * Copyright (C) 1992, 1994 by Theodore Ts'o.
5 *
6 * Redistribution of this file is permitted under the terms of the GNU
7 * Public License (GPL)
8 *
9 * These are the UART port assignments, expressed as offsets from the base
10 * register. These assignments should hold for any serial port based on
11 * a 8250, 16450, or 16550(A).
12 */
13
14#ifndef _LINUX_SERIAL_REG_H
15#define _LINUX_SERIAL_REG_H
16
17/*
18 * DLAB=0
19 */
20#define UART_RX 0 /* In: Receive buffer */
21#define UART_TX 0 /* Out: Transmit buffer */
22
23#define UART_IER 1 /* Out: Interrupt Enable Register */
24#define UART_IER_MSI 0x08 /* Enable Modem status interrupt */
25#define UART_IER_RLSI 0x04 /* Enable receiver line status interrupt */
26#define UART_IER_THRI 0x02 /* Enable Transmitter holding register int. */
27#define UART_IER_RDI 0x01 /* Enable receiver data interrupt */
28/*
29 * Sleep mode for ST16650 and TI16750. For the ST16650, EFR[4]=1
30 */
31#define UART_IERX_SLEEP 0x10 /* Enable sleep mode */
32
33#define UART_IIR 2 /* In: Interrupt ID Register */
34#define UART_IIR_NO_INT 0x01 /* No interrupts pending */
35#define UART_IIR_ID 0x06 /* Mask for the interrupt ID */
36#define UART_IIR_MSI 0x00 /* Modem status interrupt */
37#define UART_IIR_THRI 0x02 /* Transmitter holding register empty */
38#define UART_IIR_RDI 0x04 /* Receiver data interrupt */
39#define UART_IIR_RLSI 0x06 /* Receiver line status interrupt */
40
41#define UART_FCR 2 /* Out: FIFO Control Register */
42#define UART_FCR_ENABLE_FIFO 0x01 /* Enable the FIFO */
43#define UART_FCR_CLEAR_RCVR 0x02 /* Clear the RCVR FIFO */
44#define UART_FCR_CLEAR_XMIT 0x04 /* Clear the XMIT FIFO */
45#define UART_FCR_DMA_SELECT 0x08 /* For DMA applications */
46/*
47 * Note: The FIFO trigger levels are chip specific:
48 * RX:76 = 00 01 10 11 TX:54 = 00 01 10 11
49 * PC16550D: 1 4 8 14 xx xx xx xx
50 * TI16C550A: 1 4 8 14 xx xx xx xx
51 * TI16C550C: 1 4 8 14 xx xx xx xx
52 * ST16C550: 1 4 8 14 xx xx xx xx
53 * ST16C650: 8 16 24 28 16 8 24 30 PORT_16650V2
54 * NS16C552: 1 4 8 14 xx xx xx xx
55 * ST16C654: 8 16 56 60 8 16 32 56 PORT_16654
56 * TI16C750: 1 16 32 56 xx xx xx xx PORT_16750
57 * TI16C752: 8 16 56 60 8 16 32 56
58 */
59#define UART_FCR_R_TRIG_00 0x00
60#define UART_FCR_R_TRIG_01 0x40
61#define UART_FCR_R_TRIG_10 0x80
62#define UART_FCR_R_TRIG_11 0xc0
63#define UART_FCR_T_TRIG_00 0x00
64#define UART_FCR_T_TRIG_01 0x10
65#define UART_FCR_T_TRIG_10 0x20
66#define UART_FCR_T_TRIG_11 0x30
67
68#define UART_FCR_TRIGGER_MASK 0xC0 /* Mask for the FIFO trigger range */
69#define UART_FCR_TRIGGER_1 0x00 /* Mask for trigger set at 1 */
70#define UART_FCR_TRIGGER_4 0x40 /* Mask for trigger set at 4 */
71#define UART_FCR_TRIGGER_8 0x80 /* Mask for trigger set at 8 */
72#define UART_FCR_TRIGGER_14 0xC0 /* Mask for trigger set at 14 */
73/* 16650 definitions */
74#define UART_FCR6_R_TRIGGER_8 0x00 /* Mask for receive trigger set at 1 */
75#define UART_FCR6_R_TRIGGER_16 0x40 /* Mask for receive trigger set at 4 */
76#define UART_FCR6_R_TRIGGER_24 0x80 /* Mask for receive trigger set at 8 */
77#define UART_FCR6_R_TRIGGER_28 0xC0 /* Mask for receive trigger set at 14 */
78#define UART_FCR6_T_TRIGGER_16 0x00 /* Mask for transmit trigger set at 16 */
79#define UART_FCR6_T_TRIGGER_8 0x10 /* Mask for transmit trigger set at 8 */
80#define UART_FCR6_T_TRIGGER_24 0x20 /* Mask for transmit trigger set at 24 */
81#define UART_FCR6_T_TRIGGER_30 0x30 /* Mask for transmit trigger set at 30 */
82#define UART_FCR7_64BYTE 0x20 /* Go into 64 byte mode (TI16C750) */
83
84#define UART_LCR 3 /* Out: Line Control Register */
85/*
86 * Note: if the word length is 5 bits (UART_LCR_WLEN5), then setting
87 * UART_LCR_STOP will select 1.5 stop bits, not 2 stop bits.
88 */
89#define UART_LCR_DLAB 0x80 /* Divisor latch access bit */
90#define UART_LCR_SBC 0x40 /* Set break control */
91#define UART_LCR_SPAR 0x20 /* Stick parity (?) */
92#define UART_LCR_EPAR 0x10 /* Even parity select */
93#define UART_LCR_PARITY 0x08 /* Parity Enable */
94#define UART_LCR_STOP 0x04 /* Stop bits: 0=1 bit, 1=2 bits */
95#define UART_LCR_WLEN5 0x00 /* Wordlength: 5 bits */
96#define UART_LCR_WLEN6 0x01 /* Wordlength: 6 bits */
97#define UART_LCR_WLEN7 0x02 /* Wordlength: 7 bits */
98#define UART_LCR_WLEN8 0x03 /* Wordlength: 8 bits */
99
100#define UART_MCR 4 /* Out: Modem Control Register */
101#define UART_MCR_CLKSEL 0x80 /* Divide clock by 4 (TI16C752, EFR[4]=1) */
102#define UART_MCR_TCRTLR 0x40 /* Access TCR/TLR (TI16C752, EFR[4]=1) */
103#define UART_MCR_XONANY 0x20 /* Enable Xon Any (TI16C752, EFR[4]=1) */
104#define UART_MCR_AFE 0x20 /* Enable auto-RTS/CTS (TI16C550C/TI16C750) */
105#define UART_MCR_LOOP 0x10 /* Enable loopback test mode */
106#define UART_MCR_OUT2 0x08 /* Out2 complement */
107#define UART_MCR_OUT1 0x04 /* Out1 complement */
108#define UART_MCR_RTS 0x02 /* RTS complement */
109#define UART_MCR_DTR 0x01 /* DTR complement */
110
111#define UART_LSR 5 /* In: Line Status Register */
112#define UART_LSR_TEMT 0x40 /* Transmitter empty */
113#define UART_LSR_THRE 0x20 /* Transmit-hold-register empty */
114#define UART_LSR_BI 0x10 /* Break interrupt indicator */
115#define UART_LSR_FE 0x08 /* Frame error indicator */
116#define UART_LSR_PE 0x04 /* Parity error indicator */
117#define UART_LSR_OE 0x02 /* Overrun error indicator */
118#define UART_LSR_DR 0x01 /* Receiver data ready */
119
120#define UART_MSR 6 /* In: Modem Status Register */
121#define UART_MSR_DCD 0x80 /* Data Carrier Detect */
122#define UART_MSR_RI 0x40 /* Ring Indicator */
123#define UART_MSR_DSR 0x20 /* Data Set Ready */
124#define UART_MSR_CTS 0x10 /* Clear to Send */
125#define UART_MSR_DDCD 0x08 /* Delta DCD */
126#define UART_MSR_TERI 0x04 /* Trailing edge ring indicator */
127#define UART_MSR_DDSR 0x02 /* Delta DSR */
128#define UART_MSR_DCTS 0x01 /* Delta CTS */
129#define UART_MSR_ANY_DELTA 0x0F /* Any of the delta bits! */
130
131#define UART_SCR 7 /* I/O: Scratch Register */
132
133/*
134 * DLAB=1
135 */
136#define UART_DLL 0 /* Out: Divisor Latch Low */
137#define UART_DLM 1 /* Out: Divisor Latch High */
138
139/*
140 * LCR=0xBF (or DLAB=1 for 16C660)
141 */
142#define UART_EFR 2 /* I/O: Extended Features Register */
143#define UART_EFR_CTS 0x80 /* CTS flow control */
144#define UART_EFR_RTS 0x40 /* RTS flow control */
145#define UART_EFR_SCD 0x20 /* Special character detect */
146#define UART_EFR_ECB 0x10 /* Enhanced control bit */
147/*
148 * the low four bits control software flow control
149 */
150
151/*
152 * LCR=0xBF, TI16C752, ST16650, ST16650A, ST16654
153 */
154#define UART_XON1 4 /* I/O: Xon character 1 */
155#define UART_XON2 5 /* I/O: Xon character 2 */
156#define UART_XOFF1 6 /* I/O: Xoff character 1 */
157#define UART_XOFF2 7 /* I/O: Xoff character 2 */
158
159/*
160 * EFR[4]=1 MCR[6]=1, TI16C752
161 */
162#define UART_TI752_TCR 6 /* I/O: transmission control register */
163#define UART_TI752_TLR 7 /* I/O: trigger level register */
164
165/*
166 * LCR=0xBF, XR16C85x
167 */
168#define UART_TRG 0 /* FCTR bit 7 selects Rx or Tx
169 * In: Fifo count
170 * Out: Fifo custom trigger levels */
171/*
172 * These are the definitions for the Programmable Trigger Register
173 */
174#define UART_TRG_1 0x01
175#define UART_TRG_4 0x04
176#define UART_TRG_8 0x08
177#define UART_TRG_16 0x10
178#define UART_TRG_32 0x20
179#define UART_TRG_64 0x40
180#define UART_TRG_96 0x60
181#define UART_TRG_120 0x78
182#define UART_TRG_128 0x80
183
184#define UART_FCTR 1 /* Feature Control Register */
185#define UART_FCTR_RTS_NODELAY 0x00 /* RTS flow control delay */
186#define UART_FCTR_RTS_4DELAY 0x01
187#define UART_FCTR_RTS_6DELAY 0x02
188#define UART_FCTR_RTS_8DELAY 0x03
189#define UART_FCTR_IRDA 0x04 /* IrDa data encode select */
190#define UART_FCTR_TX_INT 0x08 /* Tx interrupt type select */
191#define UART_FCTR_TRGA 0x00 /* Tx/Rx 550 trigger table select */
192#define UART_FCTR_TRGB 0x10 /* Tx/Rx 650 trigger table select */
193#define UART_FCTR_TRGC 0x20 /* Tx/Rx 654 trigger table select */
194#define UART_FCTR_TRGD 0x30 /* Tx/Rx 850 programmable trigger select */
195#define UART_FCTR_SCR_SWAP 0x40 /* Scratch pad register swap */
196#define UART_FCTR_RX 0x00 /* Programmable trigger mode select */
197#define UART_FCTR_TX 0x80 /* Programmable trigger mode select */
198
199/*
200 * LCR=0xBF, FCTR[6]=1
201 */
202#define UART_EMSR 7 /* Extended Mode Select Register */
203#define UART_EMSR_FIFO_COUNT 0x01 /* Rx/Tx select */
204#define UART_EMSR_ALT_COUNT 0x02 /* Alternating count select */
205
206/*
207 * The Intel XScale on-chip UARTs define these bits
208 */
209#define UART_IER_DMAE 0x80 /* DMA Requests Enable */
210#define UART_IER_UUE 0x40 /* UART Unit Enable */
211#define UART_IER_NRZE 0x20 /* NRZ coding Enable */
212#define UART_IER_RTOIE 0x10 /* Receiver Time Out Interrupt Enable */
213
214#define UART_IIR_TOD 0x08 /* Character Timeout Indication Detected */
215
216#define UART_FCR_PXAR1 0x00 /* receive FIFO treshold = 1 */
217#define UART_FCR_PXAR8 0x40 /* receive FIFO treshold = 8 */
218#define UART_FCR_PXAR16 0x80 /* receive FIFO treshold = 16 */
219#define UART_FCR_PXAR32 0xc0 /* receive FIFO treshold = 32 */
220
221
222
223
224/*
225 * These register definitions are for the 16C950
226 */
227#define UART_ASR 0x01 /* Additional Status Register */
228#define UART_RFL 0x03 /* Receiver FIFO level */
229#define UART_TFL 0x04 /* Transmitter FIFO level */
230#define UART_ICR 0x05 /* Index Control Register */
231
232/* The 16950 ICR registers */
233#define UART_ACR 0x00 /* Additional Control Register */
234#define UART_CPR 0x01 /* Clock Prescalar Register */
235#define UART_TCR 0x02 /* Times Clock Register */
236#define UART_CKS 0x03 /* Clock Select Register */
237#define UART_TTL 0x04 /* Transmitter Interrupt Trigger Level */
238#define UART_RTL 0x05 /* Receiver Interrupt Trigger Level */
239#define UART_FCL 0x06 /* Flow Control Level Lower */
240#define UART_FCH 0x07 /* Flow Control Level Higher */
241#define UART_ID1 0x08 /* ID #1 */
242#define UART_ID2 0x09 /* ID #2 */
243#define UART_ID3 0x0A /* ID #3 */
244#define UART_REV 0x0B /* Revision */
245#define UART_CSR 0x0C /* Channel Software Reset */
246#define UART_NMR 0x0D /* Nine-bit Mode Register */
247#define UART_CTR 0xFF
248
249/*
250 * The 16C950 Additional Control Reigster
251 */
252#define UART_ACR_RXDIS 0x01 /* Receiver disable */
253#define UART_ACR_TXDIS 0x02 /* Receiver disable */
254#define UART_ACR_DSRFC 0x04 /* DSR Flow Control */
255#define UART_ACR_TLENB 0x20 /* 950 trigger levels enable */
256#define UART_ACR_ICRRD 0x40 /* ICR Read enable */
257#define UART_ACR_ASREN 0x80 /* Additional status enable */
258
259
260
261/*
262 * These definitions are for the RSA-DV II/S card, from
263 *
264 * Kiyokazu SUTO <suto@ks-and-ks.ne.jp>
265 */
266
267#define UART_RSA_BASE (-8)
268
269#define UART_RSA_MSR ((UART_RSA_BASE) + 0) /* I/O: Mode Select Register */
270
271#define UART_RSA_MSR_SWAP (1 << 0) /* Swap low/high 8 bytes in I/O port addr */
272#define UART_RSA_MSR_FIFO (1 << 2) /* Enable the external FIFO */
273#define UART_RSA_MSR_FLOW (1 << 3) /* Enable the auto RTS/CTS flow control */
274#define UART_RSA_MSR_ITYP (1 << 4) /* Level (1) / Edge triger (0) */
275
276#define UART_RSA_IER ((UART_RSA_BASE) + 1) /* I/O: Interrupt Enable Register */
277
278#define UART_RSA_IER_Rx_FIFO_H (1 << 0) /* Enable Rx FIFO half full int. */
279#define UART_RSA_IER_Tx_FIFO_H (1 << 1) /* Enable Tx FIFO half full int. */
280#define UART_RSA_IER_Tx_FIFO_E (1 << 2) /* Enable Tx FIFO empty int. */
281#define UART_RSA_IER_Rx_TOUT (1 << 3) /* Enable char receive timeout int */
282#define UART_RSA_IER_TIMER (1 << 4) /* Enable timer interrupt */
283
284#define UART_RSA_SRR ((UART_RSA_BASE) + 2) /* IN: Status Read Register */
285
286#define UART_RSA_SRR_Tx_FIFO_NEMP (1 << 0) /* Tx FIFO is not empty (1) */
287#define UART_RSA_SRR_Tx_FIFO_NHFL (1 << 1) /* Tx FIFO is not half full (1) */
288#define UART_RSA_SRR_Tx_FIFO_NFUL (1 << 2) /* Tx FIFO is not full (1) */
289#define UART_RSA_SRR_Rx_FIFO_NEMP (1 << 3) /* Rx FIFO is not empty (1) */
290#define UART_RSA_SRR_Rx_FIFO_NHFL (1 << 4) /* Rx FIFO is not half full (1) */
291#define UART_RSA_SRR_Rx_FIFO_NFUL (1 << 5) /* Rx FIFO is not full (1) */
292#define UART_RSA_SRR_Rx_TOUT (1 << 6) /* Character reception timeout occurred (1) */
293#define UART_RSA_SRR_TIMER (1 << 7) /* Timer interrupt occurred */
294
295#define UART_RSA_FRR ((UART_RSA_BASE) + 2) /* OUT: FIFO Reset Register */
296
297#define UART_RSA_TIVSR ((UART_RSA_BASE) + 3) /* I/O: Timer Interval Value Set Register */
298
299#define UART_RSA_TCR ((UART_RSA_BASE) + 4) /* OUT: Timer Control Register */
300
301#define UART_RSA_TCR_SWITCH (1 << 0) /* Timer on */
302
303/*
304 * The RSA DSV/II board has two fixed clock frequencies. One is the
305 * standard rate, and the other is 8 times faster.
306 */
307#define SERIAL_RSA_BAUD_BASE (921600)
308#define SERIAL_RSA_BAUD_BASE_LO (SERIAL_RSA_BAUD_BASE / 8)
309
310/*
311 * Extra serial register definitions for the internal UARTs
312 * in TI OMAP processors.
313 */
314#define UART_OMAP_MDR1 0x08 /* Mode definition register */
315#define UART_OMAP_MDR2 0x09 /* Mode definition register 2 */
316#define UART_OMAP_SCR 0x10 /* Supplementary control register */
317#define UART_OMAP_SSR 0x11 /* Supplementary status register */
318#define UART_OMAP_EBLR 0x12 /* BOF length register */
319#define UART_OMAP_OSC_12M_SEL 0x13 /* OMAP1510 12MHz osc select */
320#define UART_OMAP_MVER 0x14 /* Module version register */
321#define UART_OMAP_SYSC 0x15 /* System configuration register */
322#define UART_OMAP_SYSS 0x16 /* System status register */
323
324#endif /* _LINUX_SERIAL_REG_H */
325