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ths5fafdf22007-09-16 21:08:06 +00001/*
pbrook69db0ac2006-07-17 18:45:34 +00002 * Arm PrimeCell PL050 Keyboard / Mouse Interface
pbrookcdbdb642006-04-09 01:32:52 +00003 *
pbrook9e61ec32007-04-30 02:39:55 +00004 * Copyright (c) 2006-2007 CodeSourcery.
pbrookcdbdb642006-04-09 01:32:52 +00005 * Written by Paul Brook
6 *
7 * This code is licenced under the GPL.
8 */
9
Paul Brook86394e92009-05-14 22:35:07 +010010#include "sysbus.h"
pbrook87ecb682007-11-17 17:14:51 +000011#include "ps2.h"
pbrookcdbdb642006-04-09 01:32:52 +000012
13typedef struct {
Paul Brook86394e92009-05-14 22:35:07 +010014 SysBusDevice busdev;
pbrookcdbdb642006-04-09 01:32:52 +000015 void *dev;
pbrookcdbdb642006-04-09 01:32:52 +000016 uint32_t cr;
17 uint32_t clk;
18 uint32_t last;
pbrookcdbdb642006-04-09 01:32:52 +000019 int pending;
pbrookd537cf62007-04-07 18:14:41 +000020 qemu_irq irq;
pbrookcdbdb642006-04-09 01:32:52 +000021 int is_mouse;
22} pl050_state;
23
pbrook9e61ec32007-04-30 02:39:55 +000024#define PL050_TXEMPTY (1 << 6)
25#define PL050_TXBUSY (1 << 5)
26#define PL050_RXFULL (1 << 4)
27#define PL050_RXBUSY (1 << 3)
28#define PL050_RXPARITY (1 << 2)
29#define PL050_KMIC (1 << 1)
30#define PL050_KMID (1 << 0)
31
pbrookcdbdb642006-04-09 01:32:52 +000032static const unsigned char pl050_id[] =
33{ 0x50, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
34
35static void pl050_update(void *opaque, int level)
36{
37 pl050_state *s = (pl050_state *)opaque;
38 int raise;
39
40 s->pending = level;
41 raise = (s->pending && (s->cr & 0x10) != 0)
42 || (s->cr & 0x08) != 0;
pbrookd537cf62007-04-07 18:14:41 +000043 qemu_set_irq(s->irq, raise);
pbrookcdbdb642006-04-09 01:32:52 +000044}
45
Anthony Liguoric227f092009-10-01 16:12:16 -050046static uint32_t pl050_read(void *opaque, target_phys_addr_t offset)
pbrookcdbdb642006-04-09 01:32:52 +000047{
48 pl050_state *s = (pl050_state *)opaque;
pbrookcdbdb642006-04-09 01:32:52 +000049 if (offset >= 0xfe0 && offset < 0x1000)
50 return pl050_id[(offset - 0xfe0) >> 2];
51
52 switch (offset >> 2) {
53 case 0: /* KMICR */
54 return s->cr;
55 case 1: /* KMISTAT */
pbrook9e61ec32007-04-30 02:39:55 +000056 {
57 uint8_t val;
58 uint32_t stat;
59
60 val = s->last;
61 val = val ^ (val >> 4);
62 val = val ^ (val >> 2);
63 val = (val ^ (val >> 1)) & 1;
64
65 stat = PL050_TXEMPTY;
66 if (val)
67 stat |= PL050_RXPARITY;
68 if (s->pending)
69 stat |= PL050_RXFULL;
70
71 return stat;
pbrookcdbdb642006-04-09 01:32:52 +000072 }
73 case 2: /* KMIDATA */
74 if (s->pending)
75 s->last = ps2_read_data(s->dev);
76 return s->last;
77 case 3: /* KMICLKDIV */
78 return s->clk;
79 case 4: /* KMIIR */
80 return s->pending | 2;
81 default:
Paul Brook2ac71172009-05-08 02:35:15 +010082 hw_error("pl050_read: Bad offset %x\n", (int)offset);
pbrookcdbdb642006-04-09 01:32:52 +000083 return 0;
84 }
85}
86
Anthony Liguoric227f092009-10-01 16:12:16 -050087static void pl050_write(void *opaque, target_phys_addr_t offset,
pbrookcdbdb642006-04-09 01:32:52 +000088 uint32_t value)
89{
90 pl050_state *s = (pl050_state *)opaque;
pbrookcdbdb642006-04-09 01:32:52 +000091 switch (offset >> 2) {
92 case 0: /* KMICR */
93 s->cr = value;
94 pl050_update(s, s->pending);
95 /* ??? Need to implement the enable/disable bit. */
96 break;
97 case 2: /* KMIDATA */
98 /* ??? This should toggle the TX interrupt line. */
99 /* ??? This means kbd/mouse can block each other. */
100 if (s->is_mouse) {
101 ps2_write_mouse(s->dev, value);
102 } else {
103 ps2_write_keyboard(s->dev, value);
104 }
105 break;
106 case 3: /* KMICLKDIV */
107 s->clk = value;
108 return;
109 default:
Paul Brook2ac71172009-05-08 02:35:15 +0100110 hw_error("pl050_write: Bad offset %x\n", (int)offset);
pbrookcdbdb642006-04-09 01:32:52 +0000111 }
112}
Blue Swirld60efc62009-08-25 18:29:31 +0000113static CPUReadMemoryFunc * const pl050_readfn[] = {
pbrookcdbdb642006-04-09 01:32:52 +0000114 pl050_read,
115 pl050_read,
116 pl050_read
117};
118
Blue Swirld60efc62009-08-25 18:29:31 +0000119static CPUWriteMemoryFunc * const pl050_writefn[] = {
pbrookcdbdb642006-04-09 01:32:52 +0000120 pl050_write,
121 pl050_write,
122 pl050_write
123};
124
Gerd Hoffmann81a322d2009-08-14 10:36:05 +0200125static int pl050_init(SysBusDevice *dev, int is_mouse)
pbrookcdbdb642006-04-09 01:32:52 +0000126{
Paul Brook86394e92009-05-14 22:35:07 +0100127 pl050_state *s = FROM_SYSBUS(pl050_state, dev);
pbrookcdbdb642006-04-09 01:32:52 +0000128 int iomemtype;
pbrookcdbdb642006-04-09 01:32:52 +0000129
Avi Kivity1eed09c2009-06-14 11:38:51 +0300130 iomemtype = cpu_register_io_memory(pl050_readfn,
pbrookcdbdb642006-04-09 01:32:52 +0000131 pl050_writefn, s);
Paul Brook86394e92009-05-14 22:35:07 +0100132 sysbus_init_mmio(dev, 0x1000, iomemtype);
133 sysbus_init_irq(dev, &s->irq);
pbrookcdbdb642006-04-09 01:32:52 +0000134 s->is_mouse = is_mouse;
Paul Brook86394e92009-05-14 22:35:07 +0100135 if (s->is_mouse)
pbrookcdbdb642006-04-09 01:32:52 +0000136 s->dev = ps2_mouse_init(pl050_update, s);
137 else
138 s->dev = ps2_kbd_init(pl050_update, s);
139 /* ??? Save/restore. */
Gerd Hoffmann81a322d2009-08-14 10:36:05 +0200140 return 0;
pbrookcdbdb642006-04-09 01:32:52 +0000141}
Paul Brook86394e92009-05-14 22:35:07 +0100142
Gerd Hoffmann81a322d2009-08-14 10:36:05 +0200143static int pl050_init_keyboard(SysBusDevice *dev)
Paul Brook86394e92009-05-14 22:35:07 +0100144{
Gerd Hoffmann81a322d2009-08-14 10:36:05 +0200145 return pl050_init(dev, 0);
Paul Brook86394e92009-05-14 22:35:07 +0100146}
147
Gerd Hoffmann81a322d2009-08-14 10:36:05 +0200148static int pl050_init_mouse(SysBusDevice *dev)
Paul Brook86394e92009-05-14 22:35:07 +0100149{
Gerd Hoffmann81a322d2009-08-14 10:36:05 +0200150 return pl050_init(dev, 1);
Paul Brook86394e92009-05-14 22:35:07 +0100151}
152
153static void pl050_register_devices(void)
154{
155 sysbus_register_dev("pl050_keyboard", sizeof(pl050_state),
156 pl050_init_keyboard);
157 sysbus_register_dev("pl050_mouse", sizeof(pl050_state),
158 pl050_init_mouse);
159}
160
161device_init(pl050_register_devices)