Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Driver for 8250/16550-type serial ports |
3 | * | |
4 | * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. | |
5 | * | |
6 | * Copyright (C) 2001 Russell King. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
1da177e4 LT |
12 | */ |
13 | ||
bc49a661 | 14 | #include <linux/serial_8250.h> |
9ee4b83e HK |
15 | #include <linux/dmaengine.h> |
16 | ||
17 | struct uart_8250_dma { | |
18 | dma_filter_fn fn; | |
19 | void *rx_param; | |
20 | void *tx_param; | |
21 | ||
22 | int rx_chan_id; | |
23 | int tx_chan_id; | |
24 | ||
25 | struct dma_slave_config rxconf; | |
26 | struct dma_slave_config txconf; | |
27 | ||
28 | struct dma_chan *rxchan; | |
29 | struct dma_chan *txchan; | |
30 | ||
31 | dma_addr_t rx_addr; | |
32 | dma_addr_t tx_addr; | |
33 | ||
34 | dma_cookie_t rx_cookie; | |
35 | dma_cookie_t tx_cookie; | |
36 | ||
37 | void *rx_buf; | |
38 | ||
39 | size_t rx_size; | |
40 | size_t tx_size; | |
41 | ||
42 | unsigned char tx_running:1; | |
43 | }; | |
1da177e4 LT |
44 | |
45 | struct old_serial_port { | |
46 | unsigned int uart; | |
47 | unsigned int baud_base; | |
48 | unsigned int port; | |
49 | unsigned int irq; | |
50 | unsigned int flags; | |
51 | unsigned char hub6; | |
52 | unsigned char io_type; | |
53 | unsigned char *iomem_base; | |
54 | unsigned short iomem_reg_shift; | |
1c2f0493 | 55 | unsigned long irqflags; |
1da177e4 LT |
56 | }; |
57 | ||
1da177e4 LT |
58 | struct serial8250_config { |
59 | const char *name; | |
60 | unsigned short fifo_size; | |
61 | unsigned short tx_loadsz; | |
62 | unsigned char fcr; | |
63 | unsigned int flags; | |
64 | }; | |
65 | ||
66 | #define UART_CAP_FIFO (1 << 8) /* UART has FIFO */ | |
67 | #define UART_CAP_EFR (1 << 9) /* UART has EFR */ | |
68 | #define UART_CAP_SLEEP (1 << 10) /* UART has IER sleep */ | |
69 | #define UART_CAP_AFE (1 << 11) /* MCR-based hw flow control */ | |
70 | #define UART_CAP_UUE (1 << 12) /* UART needs IER bit 6 set (Xscale) */ | |
4539c24f | 71 | #define UART_CAP_RTOIE (1 << 13) /* UART needs IER bit 4 set (Xscale, Tegra) */ |
ebebd49a | 72 | #define UART_CAP_HFIFO (1 << 14) /* UART has a "hidden" FIFO */ |
1da177e4 | 73 | |
4ba5e35d | 74 | #define UART_BUG_QUOT (1 << 0) /* UART has buggy quot LSB */ |
55d3b282 | 75 | #define UART_BUG_TXEN (1 << 1) /* UART has buggy TX IIR status */ |
21c614a7 | 76 | #define UART_BUG_NOMSR (1 << 2) /* UART has buggy MSR status bits (Au1x00) */ |
363f66fe | 77 | #define UART_BUG_THRE (1 << 3) /* UART has buggy THRE reassertion */ |
eb26dfe8 | 78 | #define UART_BUG_PARITY (1 << 4) /* UART mishandles parity if FIFO enabled */ |
4ba5e35d | 79 | |
1da177e4 LT |
80 | #define PROBE_RSA (1 << 0) |
81 | #define PROBE_ANY (~0) | |
82 | ||
83 | #define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8) | |
84 | ||
85 | #ifdef CONFIG_SERIAL_8250_SHARE_IRQ | |
86 | #define SERIAL8250_SHARE_IRQS 1 | |
87 | #else | |
88 | #define SERIAL8250_SHARE_IRQS 0 | |
89 | #endif | |
90 | ||
3f0ab327 PG |
91 | static inline int serial_in(struct uart_8250_port *up, int offset) |
92 | { | |
93 | return up->port.serial_in(&up->port, offset); | |
94 | } | |
95 | ||
96 | static inline void serial_out(struct uart_8250_port *up, int offset, int value) | |
97 | { | |
98 | up->port.serial_out(&up->port, offset, value); | |
99 | } | |
100 | ||
0ad372b9 SM |
101 | void serial8250_clear_and_reinit_fifos(struct uart_8250_port *p); |
102 | ||
cc419fa0 MD |
103 | static inline int serial_dl_read(struct uart_8250_port *up) |
104 | { | |
105 | return up->dl_read(up); | |
106 | } | |
107 | ||
108 | static inline void serial_dl_write(struct uart_8250_port *up, int value) | |
109 | { | |
110 | up->dl_write(up, value); | |
111 | } | |
112 | ||
1da177e4 LT |
113 | #if defined(__alpha__) && !defined(CONFIG_PCI) |
114 | /* | |
115 | * Digital did something really horribly wrong with the OUT1 and OUT2 | |
116 | * lines on at least some ALPHA's. The failure mode is that if either | |
117 | * is cleared, the machine locks up with endless interrupts. | |
118 | */ | |
119 | #define ALPHA_KLUDGE_MCR (UART_MCR_OUT2 | UART_MCR_OUT1) | |
1da177e4 LT |
120 | #else |
121 | #define ALPHA_KLUDGE_MCR 0 | |
122 | #endif | |
835d844d SY |
123 | |
124 | #ifdef CONFIG_SERIAL_8250_PNP | |
125 | int serial8250_pnp_init(void); | |
126 | void serial8250_pnp_exit(void); | |
127 | #else | |
128 | static inline int serial8250_pnp_init(void) { return 0; } | |
129 | static inline void serial8250_pnp_exit(void) { } | |
130 | #endif | |
131 | ||
54ec52b6 TL |
132 | #ifdef CONFIG_ARCH_OMAP1 |
133 | static inline int is_omap1_8250(struct uart_8250_port *pt) | |
134 | { | |
135 | int res; | |
136 | ||
137 | switch (pt->port.mapbase) { | |
138 | case OMAP1_UART1_BASE: | |
139 | case OMAP1_UART2_BASE: | |
140 | case OMAP1_UART3_BASE: | |
141 | res = 1; | |
142 | break; | |
143 | default: | |
144 | res = 0; | |
145 | break; | |
146 | } | |
147 | ||
148 | return res; | |
149 | } | |
150 | ||
151 | static inline int is_omap1510_8250(struct uart_8250_port *pt) | |
152 | { | |
153 | if (!cpu_is_omap1510()) | |
154 | return 0; | |
155 | ||
156 | return is_omap1_8250(pt); | |
157 | } | |
158 | #else | |
159 | static inline int is_omap1_8250(struct uart_8250_port *pt) | |
160 | { | |
161 | return 0; | |
162 | } | |
163 | static inline int is_omap1510_8250(struct uart_8250_port *pt) | |
164 | { | |
165 | return 0; | |
166 | } | |
167 | #endif | |
9ee4b83e HK |
168 | |
169 | #ifdef CONFIG_SERIAL_8250_DMA | |
170 | extern int serial8250_tx_dma(struct uart_8250_port *); | |
171 | extern int serial8250_rx_dma(struct uart_8250_port *, unsigned int iir); | |
172 | extern int serial8250_request_dma(struct uart_8250_port *); | |
173 | extern void serial8250_release_dma(struct uart_8250_port *); | |
174 | #else | |
175 | static inline int serial8250_tx_dma(struct uart_8250_port *p) | |
176 | { | |
177 | return -1; | |
178 | } | |
179 | static inline int serial8250_rx_dma(struct uart_8250_port *p, unsigned int iir) | |
180 | { | |
181 | return -1; | |
182 | } | |
183 | static inline int serial8250_request_dma(struct uart_8250_port *p) | |
184 | { | |
185 | return -1; | |
186 | } | |
187 | static inline void serial8250_release_dma(struct uart_8250_port *p) { } | |
188 | #endif |