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Commit | Line | Data |
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a1497357 MA |
1 | /* |
2 | Mantis PCI bridge driver | |
3 | ||
4 | Copyright (C) Manu Abraham (abraham.manu@gmail.com) | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
b3b96144 | 21 | #include <linux/kernel.h> |
add20636 | 22 | #include <linux/spinlock.h> |
b7f080cf | 23 | #include <asm/io.h> |
b3b96144 | 24 | |
b3b96144 MA |
25 | #include <linux/signal.h> |
26 | #include <linux/sched.h> | |
27 | #include <linux/interrupt.h> | |
28 | ||
29 | #include "dmxdev.h" | |
30 | #include "dvbdev.h" | |
31 | #include "dvb_demux.h" | |
32 | #include "dvb_frontend.h" | |
33 | #include "dvb_net.h" | |
34 | ||
add20636 | 35 | #include "mantis_common.h" |
b3b96144 MA |
36 | #include "mantis_reg.h" |
37 | #include "mantis_uart.h" | |
add20636 MA |
38 | |
39 | struct mantis_uart_params { | |
40 | enum mantis_baud baud_rate; | |
41 | enum mantis_parity parity; | |
42 | }; | |
43 | ||
a1497357 MA |
44 | static struct { |
45 | char string[7]; | |
46 | } rates[5] = { | |
47 | { "9600" }, | |
48 | { "19200" }, | |
49 | { "38400" }, | |
50 | { "57600" }, | |
51 | { "115200" } | |
52 | }; | |
53 | ||
54 | static struct { | |
55 | char string[5]; | |
56 | } parity[3] = { | |
57 | { "NONE" }, | |
58 | { "ODD" }, | |
59 | { "EVEN" } | |
60 | }; | |
61 | ||
add20636 MA |
62 | #define UART_MAX_BUF 16 |
63 | ||
64 | int mantis_uart_read(struct mantis_pci *mantis, u8 *data) | |
65 | { | |
66 | struct mantis_hwconfig *config = mantis->hwconfig; | |
0bdc799b | 67 | u32 stat = 0, i; |
add20636 MA |
68 | |
69 | /* get data */ | |
70 | for (i = 0; i < (config->bytes + 1); i++) { | |
71 | ||
0bdc799b MA |
72 | stat = mmread(MANTIS_UART_STAT); |
73 | ||
add20636 | 74 | if (stat & MANTIS_UART_RXFIFO_FULL) { |
b3b96144 | 75 | dprintk(MANTIS_ERROR, 1, "RX Fifo FULL"); |
add20636 MA |
76 | } |
77 | data[i] = mmread(MANTIS_UART_RXD) & 0x3f; | |
78 | ||
b3b96144 | 79 | dprintk(MANTIS_DEBUG, 1, "Reading ... <%02x>", data[i] & 0x3f); |
add20636 MA |
80 | |
81 | if (data[i] & (1 << 7)) { | |
b3b96144 | 82 | dprintk(MANTIS_ERROR, 1, "UART framing error"); |
add20636 MA |
83 | return -EINVAL; |
84 | } | |
85 | if (data[i] & (1 << 6)) { | |
b3b96144 | 86 | dprintk(MANTIS_ERROR, 1, "UART parity error"); |
add20636 MA |
87 | return -EINVAL; |
88 | } | |
89 | } | |
90 | ||
91 | return 0; | |
92 | } | |
93 | ||
94 | static void mantis_uart_work(struct work_struct *work) | |
95 | { | |
96 | struct mantis_pci *mantis = container_of(work, struct mantis_pci, uart_work); | |
97 | struct mantis_hwconfig *config = mantis->hwconfig; | |
98 | u8 buf[16]; | |
99 | int i; | |
100 | ||
add20636 MA |
101 | mantis_uart_read(mantis, buf); |
102 | ||
add20636 | 103 | for (i = 0; i < (config->bytes + 1); i++) |
a1497357 | 104 | dprintk(MANTIS_INFO, 1, "UART BUF:%d <%02x> ", i, buf[i]); |
add20636 | 105 | |
b3b96144 | 106 | dprintk(MANTIS_DEBUG, 0, "\n"); |
add20636 MA |
107 | } |
108 | ||
109 | static int mantis_uart_setup(struct mantis_pci *mantis, | |
110 | struct mantis_uart_params *params) | |
111 | { | |
add20636 MA |
112 | u32 reg; |
113 | ||
add20636 MA |
114 | mmwrite((mmread(MANTIS_UART_CTL) | (params->parity & 0x3)), MANTIS_UART_CTL); |
115 | ||
116 | reg = mmread(MANTIS_UART_BAUD); | |
117 | ||
118 | switch (params->baud_rate) { | |
119 | case MANTIS_BAUD_9600: | |
120 | reg |= 0xd8; | |
121 | break; | |
122 | case MANTIS_BAUD_19200: | |
123 | reg |= 0x6c; | |
124 | break; | |
125 | case MANTIS_BAUD_38400: | |
126 | reg |= 0x36; | |
127 | break; | |
128 | case MANTIS_BAUD_57600: | |
129 | reg |= 0x23; | |
130 | break; | |
131 | case MANTIS_BAUD_115200: | |
132 | reg |= 0x11; | |
133 | break; | |
134 | default: | |
135 | return -EINVAL; | |
136 | } | |
137 | ||
138 | mmwrite(reg, MANTIS_UART_BAUD); | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
143 | int mantis_uart_init(struct mantis_pci *mantis) | |
144 | { | |
145 | struct mantis_hwconfig *config = mantis->hwconfig; | |
146 | struct mantis_uart_params params; | |
147 | ||
add20636 MA |
148 | /* default parity: */ |
149 | params.baud_rate = config->baud_rate; | |
150 | params.parity = config->parity; | |
a1497357 MA |
151 | dprintk(MANTIS_INFO, 1, "Initializing UART @ %sbps parity:%s", |
152 | rates[params.baud_rate].string, | |
153 | parity[params.parity].string); | |
add20636 MA |
154 | |
155 | init_waitqueue_head(&mantis->uart_wq); | |
156 | spin_lock_init(&mantis->uart_lock); | |
157 | ||
158 | INIT_WORK(&mantis->uart_work, mantis_uart_work); | |
159 | ||
160 | /* disable interrupt */ | |
161 | mmwrite(mmread(MANTIS_UART_CTL) & 0xffef, MANTIS_UART_CTL); | |
162 | ||
163 | mantis_uart_setup(mantis, ¶ms); | |
164 | ||
165 | /* default 1 byte */ | |
166 | mmwrite((mmread(MANTIS_UART_BAUD) | (config->bytes << 8)), MANTIS_UART_BAUD); | |
167 | ||
168 | /* flush buffer */ | |
169 | mmwrite((mmread(MANTIS_UART_CTL) | MANTIS_UART_RXFLUSH), MANTIS_UART_CTL); | |
170 | ||
171 | /* enable interrupt */ | |
172 | mmwrite(mmread(MANTIS_INT_MASK) | 0x800, MANTIS_INT_MASK); | |
173 | mmwrite(mmread(MANTIS_UART_CTL) | MANTIS_UART_RXINT, MANTIS_UART_CTL); | |
174 | ||
175 | schedule_work(&mantis->uart_work); | |
25985edc | 176 | dprintk(MANTIS_DEBUG, 1, "UART successfully initialized"); |
add20636 MA |
177 | |
178 | return 0; | |
179 | } | |
b3b96144 | 180 | EXPORT_SYMBOL_GPL(mantis_uart_init); |
add20636 MA |
181 | |
182 | void mantis_uart_exit(struct mantis_pci *mantis) | |
183 | { | |
184 | /* disable interrupt */ | |
185 | mmwrite(mmread(MANTIS_UART_CTL) & 0xffef, MANTIS_UART_CTL); | |
0d9c76ae | 186 | flush_work_sync(&mantis->uart_work); |
add20636 | 187 | } |
b3b96144 | 188 | EXPORT_SYMBOL_GPL(mantis_uart_exit); |