1/*
2 * Copyright 2012 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sub license, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
15 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
17 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
18 * USE OR OTHER DEALINGS IN THE SOFTWARE.
19 *
20 * The above copyright notice and this permission notice (including the
21 * next paragraph) shall be included in all copies or substantial portions
22 * of the Software.
23 *
24 */
25/*
26 * Authors: Dave Airlie <airlied@redhat.com>
27 */
28
29#include <linux/delay.h>
30#include <linux/pci.h>
31
32#include <drm/drm_print.h>
33
34#include "ast_drv.h"
35#include "ast_post.h"
36
37u32 __ast_mindwm(void __iomem *regs, u32 r)
38{
39 u32 data;
40
41 __ast_write32(addr: regs, reg: 0xf004, val: r & 0xffff0000);
42 __ast_write32(addr: regs, reg: 0xf000, val: 0x1);
43
44 do {
45 data = __ast_read32(addr: regs, reg: 0xf004) & 0xffff0000;
46 } while (data != (r & 0xffff0000));
47
48 return __ast_read32(addr: regs, reg: 0x10000 + (r & 0x0000ffff));
49}
50
51void __ast_moutdwm(void __iomem *regs, u32 r, u32 v)
52{
53 u32 data;
54
55 __ast_write32(addr: regs, reg: 0xf004, val: r & 0xffff0000);
56 __ast_write32(addr: regs, reg: 0xf000, val: 0x1);
57
58 do {
59 data = __ast_read32(addr: regs, reg: 0xf004) & 0xffff0000;
60 } while (data != (r & 0xffff0000));
61
62 __ast_write32(addr: regs, reg: 0x10000 + (r & 0x0000ffff), val: v);
63}
64
65u32 ast_mindwm(struct ast_device *ast, u32 r)
66{
67 return __ast_mindwm(regs: ast->regs, r);
68}
69
70void ast_moutdwm(struct ast_device *ast, u32 r, u32 v)
71{
72 __ast_moutdwm(regs: ast->regs, r, v);
73}
74
75int ast_post_gpu(struct ast_device *ast)
76{
77 int ret;
78
79 if (AST_GEN(ast) >= 7) {
80 ret = ast_2600_post(ast);
81 if (ret)
82 return ret;
83 } else if (AST_GEN(ast) >= 6) {
84 ret = ast_2500_post(ast);
85 if (ret)
86 return ret;
87 } else if (AST_GEN(ast) >= 4) {
88 ret = ast_2300_post(ast);
89 if (ret)
90 return ret;
91 } else if (AST_GEN(ast) >= 2) {
92 ret = ast_2100_post(ast);
93 if (ret)
94 return ret;
95 } else {
96 ret = ast_2000_post(ast);
97 if (ret)
98 return ret;
99 }
100
101 return 0;
102}
103
104#define TIMEOUT 5000000
105
106bool mmc_test(struct ast_device *ast, u32 datagen, u8 test_ctl)
107{
108 u32 data, timeout;
109
110 ast_moutdwm(ast, r: 0x1e6e0070, v: 0x00000000);
111 ast_moutdwm(ast, r: 0x1e6e0070, v: (datagen << 3) | test_ctl);
112 timeout = 0;
113 do {
114 data = ast_mindwm(ast, r: 0x1e6e0070) & 0x3000;
115 if (data & 0x2000)
116 return false;
117 if (++timeout > TIMEOUT) {
118 ast_moutdwm(ast, r: 0x1e6e0070, v: 0x00000000);
119 return false;
120 }
121 } while (!data);
122 ast_moutdwm(ast, r: 0x1e6e0070, v: 0x0);
123 return true;
124}
125
126bool mmc_test_burst(struct ast_device *ast, u32 datagen)
127{
128 return mmc_test(ast, datagen, test_ctl: 0xc1);
129}
130

source code of linux/drivers/gpu/drm/ast/ast_post.c