xref: /openbmc/linux/include/linux/amba/serial.h (revision 1a59d1b8)
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *  linux/include/asm-arm/hardware/serial_amba.h
4  *
5  *  Internal header file for AMBA serial ports
6  *
7  *  Copyright (C) ARM Limited
8  *  Copyright (C) 2000 Deep Blue Solutions Ltd.
9  */
10 #ifndef ASM_ARM_HARDWARE_SERIAL_AMBA_H
11 #define ASM_ARM_HARDWARE_SERIAL_AMBA_H
12 
13 #include <linux/types.h>
14 
15 /* -------------------------------------------------------------------------------
16  *  From AMBA UART (PL010) Block Specification
17  * -------------------------------------------------------------------------------
18  *  UART Register Offsets.
19  */
20 #define UART01x_DR		0x00	/* Data read or written from the interface. */
21 #define UART01x_RSR		0x04	/* Receive status register (Read). */
22 #define UART01x_ECR		0x04	/* Error clear register (Write). */
23 #define UART010_LCRH		0x08	/* Line control register, high byte. */
24 #define ST_UART011_DMAWM	0x08    /* DMA watermark configure register. */
25 #define UART010_LCRM		0x0C	/* Line control register, middle byte. */
26 #define ST_UART011_TIMEOUT	0x0C    /* Timeout period register. */
27 #define UART010_LCRL		0x10	/* Line control register, low byte. */
28 #define UART010_CR		0x14	/* Control register. */
29 #define UART01x_FR		0x18	/* Flag register (Read only). */
30 #define UART010_IIR		0x1C	/* Interrupt identification register (Read). */
31 #define UART010_ICR		0x1C	/* Interrupt clear register (Write). */
32 #define ST_UART011_LCRH_RX	0x1C    /* Rx line control register. */
33 #define UART01x_ILPR		0x20	/* IrDA low power counter register. */
34 #define UART011_IBRD		0x24	/* Integer baud rate divisor register. */
35 #define UART011_FBRD		0x28	/* Fractional baud rate divisor register. */
36 #define UART011_LCRH		0x2c	/* Line control register. */
37 #define ST_UART011_LCRH_TX	0x2c    /* Tx Line control register. */
38 #define UART011_CR		0x30	/* Control register. */
39 #define UART011_IFLS		0x34	/* Interrupt fifo level select. */
40 #define UART011_IMSC		0x38	/* Interrupt mask. */
41 #define UART011_RIS		0x3c	/* Raw interrupt status. */
42 #define UART011_MIS		0x40	/* Masked interrupt status. */
43 #define UART011_ICR		0x44	/* Interrupt clear register. */
44 #define UART011_DMACR		0x48	/* DMA control register. */
45 #define ST_UART011_XFCR		0x50	/* XON/XOFF control register. */
46 #define ST_UART011_XON1		0x54	/* XON1 register. */
47 #define ST_UART011_XON2		0x58	/* XON2 register. */
48 #define ST_UART011_XOFF1	0x5C	/* XON1 register. */
49 #define ST_UART011_XOFF2	0x60	/* XON2 register. */
50 #define ST_UART011_ITCR		0x80	/* Integration test control register. */
51 #define ST_UART011_ITIP		0x84	/* Integration test input register. */
52 #define ST_UART011_ABCR		0x100	/* Autobaud control register. */
53 #define ST_UART011_ABIMSC	0x15C	/* Autobaud interrupt mask/clear register. */
54 
55 /*
56  * ZTE UART register offsets.  This UART has a radically different address
57  * allocation from the ARM and ST variants, so we list all registers here.
58  * We assume unlisted registers do not exist.
59  */
60 #define ZX_UART011_DR		0x04
61 #define ZX_UART011_FR		0x14
62 #define ZX_UART011_IBRD		0x24
63 #define ZX_UART011_FBRD		0x28
64 #define ZX_UART011_LCRH		0x30
65 #define ZX_UART011_CR		0x34
66 #define ZX_UART011_IFLS		0x38
67 #define ZX_UART011_IMSC		0x40
68 #define ZX_UART011_RIS		0x44
69 #define ZX_UART011_MIS		0x48
70 #define ZX_UART011_ICR		0x4c
71 #define ZX_UART011_DMACR	0x50
72 
73 #define UART011_DR_OE		(1 << 11)
74 #define UART011_DR_BE		(1 << 10)
75 #define UART011_DR_PE		(1 << 9)
76 #define UART011_DR_FE		(1 << 8)
77 
78 #define UART01x_RSR_OE 		0x08
79 #define UART01x_RSR_BE 		0x04
80 #define UART01x_RSR_PE 		0x02
81 #define UART01x_RSR_FE 		0x01
82 
83 #define UART011_FR_RI		0x100
84 #define UART011_FR_TXFE		0x080
85 #define UART011_FR_RXFF		0x040
86 #define UART01x_FR_TXFF		0x020
87 #define UART01x_FR_RXFE		0x010
88 #define UART01x_FR_BUSY		0x008
89 #define UART01x_FR_DCD 		0x004
90 #define UART01x_FR_DSR 		0x002
91 #define UART01x_FR_CTS 		0x001
92 #define UART01x_FR_TMSK		(UART01x_FR_TXFF + UART01x_FR_BUSY)
93 
94 /*
95  * Some bits of Flag Register on ZTE device have different position from
96  * standard ones.
97  */
98 #define ZX_UART01x_FR_BUSY	0x100
99 #define ZX_UART01x_FR_DSR	0x008
100 #define ZX_UART01x_FR_CTS	0x002
101 #define ZX_UART011_FR_RI	0x001
102 
103 #define UART011_CR_CTSEN	0x8000	/* CTS hardware flow control */
104 #define UART011_CR_RTSEN	0x4000	/* RTS hardware flow control */
105 #define UART011_CR_OUT2		0x2000	/* OUT2 */
106 #define UART011_CR_OUT1		0x1000	/* OUT1 */
107 #define UART011_CR_RTS		0x0800	/* RTS */
108 #define UART011_CR_DTR		0x0400	/* DTR */
109 #define UART011_CR_RXE		0x0200	/* receive enable */
110 #define UART011_CR_TXE		0x0100	/* transmit enable */
111 #define UART011_CR_LBE		0x0080	/* loopback enable */
112 #define UART010_CR_RTIE		0x0040
113 #define UART010_CR_TIE 		0x0020
114 #define UART010_CR_RIE 		0x0010
115 #define UART010_CR_MSIE		0x0008
116 #define ST_UART011_CR_OVSFACT	0x0008	/* Oversampling factor */
117 #define UART01x_CR_IIRLP	0x0004	/* SIR low power mode */
118 #define UART01x_CR_SIREN	0x0002	/* SIR enable */
119 #define UART01x_CR_UARTEN	0x0001	/* UART enable */
120 
121 #define UART011_LCRH_SPS	0x80
122 #define UART01x_LCRH_WLEN_8	0x60
123 #define UART01x_LCRH_WLEN_7	0x40
124 #define UART01x_LCRH_WLEN_6	0x20
125 #define UART01x_LCRH_WLEN_5	0x00
126 #define UART01x_LCRH_FEN	0x10
127 #define UART01x_LCRH_STP2	0x08
128 #define UART01x_LCRH_EPS	0x04
129 #define UART01x_LCRH_PEN	0x02
130 #define UART01x_LCRH_BRK	0x01
131 
132 #define ST_UART011_DMAWM_RX_1	(0 << 3)
133 #define ST_UART011_DMAWM_RX_2	(1 << 3)
134 #define ST_UART011_DMAWM_RX_4	(2 << 3)
135 #define ST_UART011_DMAWM_RX_8	(3 << 3)
136 #define ST_UART011_DMAWM_RX_16	(4 << 3)
137 #define ST_UART011_DMAWM_RX_32	(5 << 3)
138 #define ST_UART011_DMAWM_RX_48	(6 << 3)
139 #define ST_UART011_DMAWM_TX_1	0
140 #define ST_UART011_DMAWM_TX_2	1
141 #define ST_UART011_DMAWM_TX_4	2
142 #define ST_UART011_DMAWM_TX_8	3
143 #define ST_UART011_DMAWM_TX_16	4
144 #define ST_UART011_DMAWM_TX_32	5
145 #define ST_UART011_DMAWM_TX_48	6
146 
147 #define UART010_IIR_RTIS	0x08
148 #define UART010_IIR_TIS		0x04
149 #define UART010_IIR_RIS		0x02
150 #define UART010_IIR_MIS		0x01
151 
152 #define UART011_IFLS_RX1_8	(0 << 3)
153 #define UART011_IFLS_RX2_8	(1 << 3)
154 #define UART011_IFLS_RX4_8	(2 << 3)
155 #define UART011_IFLS_RX6_8	(3 << 3)
156 #define UART011_IFLS_RX7_8	(4 << 3)
157 #define UART011_IFLS_TX1_8	(0 << 0)
158 #define UART011_IFLS_TX2_8	(1 << 0)
159 #define UART011_IFLS_TX4_8	(2 << 0)
160 #define UART011_IFLS_TX6_8	(3 << 0)
161 #define UART011_IFLS_TX7_8	(4 << 0)
162 /* special values for ST vendor with deeper fifo */
163 #define UART011_IFLS_RX_HALF	(5 << 3)
164 #define UART011_IFLS_TX_HALF	(5 << 0)
165 
166 #define UART011_OEIM		(1 << 10)	/* overrun error interrupt mask */
167 #define UART011_BEIM		(1 << 9)	/* break error interrupt mask */
168 #define UART011_PEIM		(1 << 8)	/* parity error interrupt mask */
169 #define UART011_FEIM		(1 << 7)	/* framing error interrupt mask */
170 #define UART011_RTIM		(1 << 6)	/* receive timeout interrupt mask */
171 #define UART011_TXIM		(1 << 5)	/* transmit interrupt mask */
172 #define UART011_RXIM		(1 << 4)	/* receive interrupt mask */
173 #define UART011_DSRMIM		(1 << 3)	/* DSR interrupt mask */
174 #define UART011_DCDMIM		(1 << 2)	/* DCD interrupt mask */
175 #define UART011_CTSMIM		(1 << 1)	/* CTS interrupt mask */
176 #define UART011_RIMIM		(1 << 0)	/* RI interrupt mask */
177 
178 #define UART011_OEIS		(1 << 10)	/* overrun error interrupt status */
179 #define UART011_BEIS		(1 << 9)	/* break error interrupt status */
180 #define UART011_PEIS		(1 << 8)	/* parity error interrupt status */
181 #define UART011_FEIS		(1 << 7)	/* framing error interrupt status */
182 #define UART011_RTIS		(1 << 6)	/* receive timeout interrupt status */
183 #define UART011_TXIS		(1 << 5)	/* transmit interrupt status */
184 #define UART011_RXIS		(1 << 4)	/* receive interrupt status */
185 #define UART011_DSRMIS		(1 << 3)	/* DSR interrupt status */
186 #define UART011_DCDMIS		(1 << 2)	/* DCD interrupt status */
187 #define UART011_CTSMIS		(1 << 1)	/* CTS interrupt status */
188 #define UART011_RIMIS		(1 << 0)	/* RI interrupt status */
189 
190 #define UART011_OEIC		(1 << 10)	/* overrun error interrupt clear */
191 #define UART011_BEIC		(1 << 9)	/* break error interrupt clear */
192 #define UART011_PEIC		(1 << 8)	/* parity error interrupt clear */
193 #define UART011_FEIC		(1 << 7)	/* framing error interrupt clear */
194 #define UART011_RTIC		(1 << 6)	/* receive timeout interrupt clear */
195 #define UART011_TXIC		(1 << 5)	/* transmit interrupt clear */
196 #define UART011_RXIC		(1 << 4)	/* receive interrupt clear */
197 #define UART011_DSRMIC		(1 << 3)	/* DSR interrupt clear */
198 #define UART011_DCDMIC		(1 << 2)	/* DCD interrupt clear */
199 #define UART011_CTSMIC		(1 << 1)	/* CTS interrupt clear */
200 #define UART011_RIMIC		(1 << 0)	/* RI interrupt clear */
201 
202 #define UART011_DMAONERR	(1 << 2)	/* disable dma on error */
203 #define UART011_TXDMAE		(1 << 1)	/* enable transmit dma */
204 #define UART011_RXDMAE		(1 << 0)	/* enable receive dma */
205 
206 #define UART01x_RSR_ANY		(UART01x_RSR_OE|UART01x_RSR_BE|UART01x_RSR_PE|UART01x_RSR_FE)
207 #define UART01x_FR_MODEM_ANY	(UART01x_FR_DCD|UART01x_FR_DSR|UART01x_FR_CTS)
208 
209 #ifndef __ASSEMBLY__
210 struct amba_device; /* in uncompress this is included but amba/bus.h is not */
211 struct amba_pl010_data {
212 	void (*set_mctrl)(struct amba_device *dev, void __iomem *base, unsigned int mctrl);
213 };
214 
215 struct dma_chan;
216 struct amba_pl011_data {
217 	bool (*dma_filter)(struct dma_chan *chan, void *filter_param);
218 	void *dma_rx_param;
219 	void *dma_tx_param;
220 	bool dma_rx_poll_enable;
221 	unsigned int dma_rx_poll_rate;
222 	unsigned int dma_rx_poll_timeout;
223         void (*init) (void);
224 	void (*exit) (void);
225 };
226 #endif
227 
228 #endif
229