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1 | /* |
1 | /* |
2 | * Copyright (c) 2006 Josef Cejka |
2 | * Copyright (c) 2006 Josef Cejka |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup kbd_port |
29 | /** @addtogroup kbd_port |
30 | * @ingroup kbd |
30 | * @ingroup kbd |
31 | * @{ |
31 | * @{ |
32 | */ |
32 | */ |
33 | /** @file |
33 | /** @file |
34 | * @brief NS16550 port driver. |
34 | * @brief NS16550 port driver. |
35 | */ |
35 | */ |
36 | 36 | ||
37 | #include <ipc/ipc.h> |
37 | #include <ipc/ipc.h> |
38 | #include <async.h> |
38 | #include <async.h> |
39 | #include <sysinfo.h> |
39 | #include <sysinfo.h> |
40 | #include <kbd.h> |
40 | #include <kbd.h> |
41 | #include <kbd_port.h> |
41 | #include <kbd_port.h> |
42 | #include <ddi.h> |
42 | #include <ddi.h> |
43 | 43 | ||
44 | /* NS16550 registers */ |
44 | /* NS16550 registers */ |
45 | #define RBR_REG 0 /** Receiver Buffer Register. */ |
45 | #define RBR_REG 0 /** Receiver Buffer Register. */ |
46 | #define IER_REG 1 /** Interrupt Enable Register. */ |
46 | #define IER_REG 1 /** Interrupt Enable Register. */ |
47 | #define IIR_REG 2 /** Interrupt Ident Register (read). */ |
47 | #define IIR_REG 2 /** Interrupt Ident Register (read). */ |
48 | #define FCR_REG 2 /** FIFO control register (write). */ |
48 | #define FCR_REG 2 /** FIFO control register (write). */ |
49 | #define LCR_REG 3 /** Line Control register. */ |
49 | #define LCR_REG 3 /** Line Control register. */ |
50 | #define MCR_REG 4 /** Modem Control Register. */ |
50 | #define MCR_REG 4 /** Modem Control Register. */ |
51 | #define LSR_REG 5 /** Line Status Register. */ |
51 | #define LSR_REG 5 /** Line Status Register. */ |
52 | 52 | ||
53 | #define LSR_DATA_READY 0x01 |
53 | #define LSR_DATA_READY 0x01 |
54 | 54 | ||
55 | static irq_cmd_t ns16550_cmds[] = { |
55 | static irq_cmd_t ns16550_cmds[] = { |
56 | { |
56 | { |
57 | .cmd = CMD_PIO_READ_8, |
57 | .cmd = CMD_PIO_READ_8, |
58 | .addr = (void *) 0, /* will be patched in run-time */ |
58 | .addr = (void *) 0, /* will be patched in run-time */ |
59 | .dstarg = 1 |
59 | .dstarg = 1 |
60 | }, |
60 | }, |
61 | { |
61 | { |
62 | .cmd = CMD_BTEST, |
62 | .cmd = CMD_BTEST, |
63 | .value = LSR_DATA_READY, |
63 | .value = LSR_DATA_READY, |
64 | .srcarg = 1, |
64 | .srcarg = 1, |
65 | .dstarg = 3 |
65 | .dstarg = 3 |
66 | }, |
66 | }, |
67 | { |
67 | { |
68 | .cmd = CMD_PREDICATE, |
68 | .cmd = CMD_PREDICATE, |
69 | .value = 2, |
69 | .value = 2, |
70 | .srcarg = 3 |
70 | .srcarg = 3 |
71 | }, |
71 | }, |
72 | { |
72 | { |
73 | .cmd = CMD_PIO_READ_8, |
73 | .cmd = CMD_PIO_READ_8, |
74 | .addr = (void *) 0, /* will be patched in run-time */ |
74 | .addr = (void *) 0, /* will be patched in run-time */ |
75 | .dstarg = 2 |
75 | .dstarg = 2 |
76 | }, |
76 | }, |
77 | { |
77 | { |
78 | .cmd = CMD_ACCEPT |
78 | .cmd = CMD_ACCEPT |
79 | } |
79 | } |
80 | }; |
80 | }; |
81 | 81 | ||
82 | irq_code_t ns16550_kbd = { |
82 | irq_code_t ns16550_kbd = { |
83 | sizeof(ns16550_cmds) / sizeof(irq_cmd_t), |
83 | sizeof(ns16550_cmds) / sizeof(irq_cmd_t), |
84 | ns16550_cmds |
84 | ns16550_cmds |
85 | }; |
85 | }; |
86 | 86 | ||
87 | static void ns16550_irq_handler(ipc_callid_t iid, ipc_call_t *call); |
87 | static void ns16550_irq_handler(ipc_callid_t iid, ipc_call_t *call); |
88 | 88 | ||
89 | static uintptr_t ns16550_physical; |
89 | static uintptr_t ns16550_physical; |
90 | static uintptr_t ns16550_kernel; |
90 | static uintptr_t ns16550_kernel; |
91 | 91 | ||
92 | int kbd_port_init(void) |
92 | int kbd_port_init(void) |
93 | { |
93 | { |
94 | void *vaddr; |
94 | void *vaddr; |
95 | 95 | ||
96 | async_set_interrupt_received(ns16550_irq_handler); |
96 | async_set_interrupt_received(ns16550_irq_handler); |
97 | 97 | ||
98 | ns16550_physical = sysinfo_value("kbd.address.physical"); |
98 | ns16550_physical = sysinfo_value("kbd.address.physical"); |
99 | ns16550_kernel = sysinfo_value("kbd.address.kernel"); |
99 | ns16550_kernel = sysinfo_value("kbd.address.kernel"); |
100 | ns16550_kbd.cmds[0].addr = (void *) (ns16550_kernel + LSR_REG); |
100 | ns16550_kbd.cmds[0].addr = (void *) (ns16550_kernel + LSR_REG); |
101 | ns16550_kbd.cmds[3].addr = (void *) (ns16550_kernel + RBR_REG); |
101 | ns16550_kbd.cmds[3].addr = (void *) (ns16550_kernel + RBR_REG); |
102 | ipc_register_irq(sysinfo_value("kbd.inr"), sysinfo_value("kbd.devno"), |
102 | ipc_register_irq(sysinfo_value("kbd.inr"), device_assign_devno(), |
103 | 0, &ns16550_kbd); |
103 | 0, &ns16550_kbd); |
104 | return pio_enable((void *) ns16550_physical, 8, &vaddr); |
104 | return pio_enable((void *) ns16550_physical, 8, &vaddr); |
105 | } |
105 | } |
106 | 106 | ||
107 | static void ns16550_irq_handler(ipc_callid_t iid, ipc_call_t *call) |
107 | static void ns16550_irq_handler(ipc_callid_t iid, ipc_call_t *call) |
108 | { |
108 | { |
109 | int scan_code = IPC_GET_ARG2(*call); |
109 | int scan_code = IPC_GET_ARG2(*call); |
110 | kbd_push_scancode(scan_code); |
110 | kbd_push_scancode(scan_code); |
111 | } |
111 | } |
112 | 112 | ||
113 | /** |
113 | /** |
114 | * @} |
114 | * @} |
115 | */ |
115 | */ |
116 | 116 |