1/*
2 * Copyright (C) 2010 Francisco Jerez.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 *
25 */
26#include <core/device.h>
27#include <subdev/fb/regsnv04.h>
28
29#define NV04_PFB_DEBUG_0					0x00100080
30#	define NV04_PFB_DEBUG_0_PAGE_MODE			0x00000001
31#	define NV04_PFB_DEBUG_0_REFRESH_OFF			0x00000010
32#	define NV04_PFB_DEBUG_0_REFRESH_COUNTX64		0x00003f00
33#	define NV04_PFB_DEBUG_0_REFRESH_SLOW_CLK		0x00004000
34#	define NV04_PFB_DEBUG_0_SAFE_MODE			0x00008000
35#	define NV04_PFB_DEBUG_0_ALOM_ENABLE			0x00010000
36#	define NV04_PFB_DEBUG_0_CASOE				0x00100000
37#	define NV04_PFB_DEBUG_0_CKE_INVERT			0x10000000
38#	define NV04_PFB_DEBUG_0_REFINC				0x20000000
39#	define NV04_PFB_DEBUG_0_SAVE_POWER_OFF			0x40000000
40#define NV04_PFB_CFG0						0x00100200
41#	define NV04_PFB_CFG0_SCRAMBLE				0x20000000
42#define NV04_PFB_CFG1						0x00100204
43#define NV04_PFB_SCRAMBLE(i)                         (0x00100400 + 4 * (i))
44
45#define NV10_PFB_REFCTRL					0x00100210
46#	define NV10_PFB_REFCTRL_VALID_1				(1 << 31)
47
48static inline struct io_mapping *
49fbmem_init(struct nvkm_device *dev)
50{
51	return io_mapping_create_wc(nv_device_resource_start(dev, 1),
52				    nv_device_resource_len(dev, 1));
53}
54
55static inline void
56fbmem_fini(struct io_mapping *fb)
57{
58	io_mapping_free(fb);
59}
60
61static inline u32
62fbmem_peek(struct io_mapping *fb, u32 off)
63{
64	u8 __iomem *p = io_mapping_map_atomic_wc(fb, off & PAGE_MASK);
65	u32 val = ioread32(p + (off & ~PAGE_MASK));
66	io_mapping_unmap_atomic(p);
67	return val;
68}
69
70static inline void
71fbmem_poke(struct io_mapping *fb, u32 off, u32 val)
72{
73	u8 __iomem *p = io_mapping_map_atomic_wc(fb, off & PAGE_MASK);
74	iowrite32(val, p + (off & ~PAGE_MASK));
75	wmb();
76	io_mapping_unmap_atomic(p);
77}
78
79static inline bool
80fbmem_readback(struct io_mapping *fb, u32 off, u32 val)
81{
82	fbmem_poke(fb, off, val);
83	return val == fbmem_peek(fb, off);
84}
85