1 | /* $NetBSD: nouveau_subdev_bus_hwsq.c,v 1.1.1.1 2014/08/06 12:36:29 riastradh Exp $ */ |
2 | |
3 | /* |
4 | * Copyright 2013 Red Hat Inc. |
5 | * |
6 | * Permission is hereby granted, free of charge, to any person obtaining a |
7 | * copy of this software and associated documentation files (the "Software"), |
8 | * to deal in the Software without restriction, including without limitation |
9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
10 | * and/or sell copies of the Software, and to permit persons to whom the |
11 | * Software is furnished to do so, subject to the following conditions: |
12 | * |
13 | * The above copyright notice and this permission notice shall be included in |
14 | * all copies or substantial portions of the Software. |
15 | * |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
19 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
22 | * OTHER DEALINGS IN THE SOFTWARE. |
23 | * |
24 | * Authors: Ben Skeggs <bskeggs@redhat.com> |
25 | */ |
26 | |
27 | #include <sys/cdefs.h> |
28 | __KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_bus_hwsq.c,v 1.1.1.1 2014/08/06 12:36:29 riastradh Exp $" ); |
29 | |
30 | #include <subdev/timer.h> |
31 | #include <subdev/bus.h> |
32 | |
33 | struct nouveau_hwsq { |
34 | struct nouveau_bus *pbus; |
35 | u32 addr; |
36 | u32 data; |
37 | struct { |
38 | u8 data[512]; |
39 | u8 size; |
40 | } c; |
41 | }; |
42 | |
43 | static void |
44 | hwsq_cmd(struct nouveau_hwsq *hwsq, int size, u8 data[]) |
45 | { |
46 | memcpy(&hwsq->c.data[hwsq->c.size], data, size * sizeof(data[0])); |
47 | hwsq->c.size += size; |
48 | } |
49 | |
50 | int |
51 | nouveau_hwsq_init(struct nouveau_bus *pbus, struct nouveau_hwsq **phwsq) |
52 | { |
53 | struct nouveau_hwsq *hwsq; |
54 | |
55 | hwsq = *phwsq = kmalloc(sizeof(*hwsq), GFP_KERNEL); |
56 | if (hwsq) { |
57 | hwsq->pbus = pbus; |
58 | hwsq->addr = ~0; |
59 | hwsq->data = ~0; |
60 | memset(hwsq->c.data, 0x7f, sizeof(hwsq->c.data)); |
61 | hwsq->c.size = 0; |
62 | } |
63 | |
64 | return hwsq ? 0 : -ENOMEM; |
65 | } |
66 | |
67 | int |
68 | nouveau_hwsq_fini(struct nouveau_hwsq **phwsq, bool exec) |
69 | { |
70 | struct nouveau_hwsq *hwsq = *phwsq; |
71 | int ret = 0, i; |
72 | if (hwsq) { |
73 | struct nouveau_bus *pbus = hwsq->pbus; |
74 | hwsq->c.size = (hwsq->c.size + 4) / 4; |
75 | if (hwsq->c.size <= pbus->hwsq_size) { |
76 | if (exec) |
77 | ret = pbus->hwsq_exec(pbus, (u32 *)hwsq->c.data, |
78 | hwsq->c.size); |
79 | if (ret) |
80 | nv_error(pbus, "hwsq exec failed: %d\n" , ret); |
81 | } else { |
82 | nv_error(pbus, "hwsq ucode too large\n" ); |
83 | ret = -ENOSPC; |
84 | } |
85 | |
86 | for (i = 0; ret && i < hwsq->c.size; i++) |
87 | nv_error(pbus, "\t0x%08x\n" , ((u32 *)hwsq->c.data)[i]); |
88 | |
89 | *phwsq = NULL; |
90 | kfree(hwsq); |
91 | } |
92 | return ret; |
93 | } |
94 | |
95 | void |
96 | nouveau_hwsq_wr32(struct nouveau_hwsq *hwsq, u32 addr, u32 data) |
97 | { |
98 | nv_debug(hwsq->pbus, "R[%06x] = 0x%08x\n" , addr, data); |
99 | |
100 | if (hwsq->data != data) { |
101 | if ((data & 0xffff0000) != (hwsq->data & 0xffff0000)) { |
102 | hwsq_cmd(hwsq, 5, (u8[]){ 0xe2, data, data >> 8, |
103 | data >> 16, data >> 24 }); |
104 | } else { |
105 | hwsq_cmd(hwsq, 3, (u8[]){ 0x42, data, data >> 8 }); |
106 | } |
107 | } |
108 | |
109 | if ((addr & 0xffff0000) != (hwsq->addr & 0xffff0000)) { |
110 | hwsq_cmd(hwsq, 5, (u8[]){ 0xe0, addr, addr >> 8, |
111 | addr >> 16, addr >> 24 }); |
112 | } else { |
113 | hwsq_cmd(hwsq, 3, (u8[]){ 0x40, addr, addr >> 8 }); |
114 | } |
115 | |
116 | hwsq->addr = addr; |
117 | hwsq->data = data; |
118 | } |
119 | |
120 | void |
121 | nouveau_hwsq_setf(struct nouveau_hwsq *hwsq, u8 flag, int data) |
122 | { |
123 | nv_debug(hwsq->pbus, " FLAG[%02x] = %d\n" , flag, data); |
124 | flag += 0x80; |
125 | if (data >= 0) |
126 | flag += 0x20; |
127 | if (data >= 1) |
128 | flag += 0x20; |
129 | hwsq_cmd(hwsq, 1, (u8[]){ flag }); |
130 | } |
131 | |
132 | void |
133 | nouveau_hwsq_wait(struct nouveau_hwsq *hwsq, u8 flag, u8 data) |
134 | { |
135 | nv_debug(hwsq->pbus, " WAIT[%02x] = %d\n" , flag, data); |
136 | hwsq_cmd(hwsq, 3, (u8[]){ 0x5f, flag, data }); |
137 | } |
138 | |
139 | void |
140 | nouveau_hwsq_nsec(struct nouveau_hwsq *hwsq, u32 nsec) |
141 | { |
142 | u8 shift = 0, usec = nsec / 1000; |
143 | while (usec & ~3) { |
144 | usec >>= 2; |
145 | shift++; |
146 | } |
147 | |
148 | nv_debug(hwsq->pbus, " DELAY = %d ns\n" , nsec); |
149 | hwsq_cmd(hwsq, 1, (u8[]){ 0x00 | (shift << 2) | usec }); |
150 | } |
151 | |