xref: /openbmc/linux/drivers/memory/tegra/tegra20.c (revision 22d55f02) 
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) 2012 NVIDIA CORPORATION.  All rights reserved.
4  */
5 
6 #include <dt-bindings/memory/tegra20-mc.h>
7 
8 #include "mc.h"
9 
10 static const struct tegra_mc_client tegra20_mc_clients[] = {
11 	{
12 		.id = 0x00,
13 		.name = "display0a",
14 	}, {
15 		.id = 0x01,
16 		.name = "display0ab",
17 	}, {
18 		.id = 0x02,
19 		.name = "display0b",
20 	}, {
21 		.id = 0x03,
22 		.name = "display0bb",
23 	}, {
24 		.id = 0x04,
25 		.name = "display0c",
26 	}, {
27 		.id = 0x05,
28 		.name = "display0cb",
29 	}, {
30 		.id = 0x06,
31 		.name = "display1b",
32 	}, {
33 		.id = 0x07,
34 		.name = "display1bb",
35 	}, {
36 		.id = 0x08,
37 		.name = "eppup",
38 	}, {
39 		.id = 0x09,
40 		.name = "g2pr",
41 	}, {
42 		.id = 0x0a,
43 		.name = "g2sr",
44 	}, {
45 		.id = 0x0b,
46 		.name = "mpeunifbr",
47 	}, {
48 		.id = 0x0c,
49 		.name = "viruv",
50 	}, {
51 		.id = 0x0d,
52 		.name = "avpcarm7r",
53 	}, {
54 		.id = 0x0e,
55 		.name = "displayhc",
56 	}, {
57 		.id = 0x0f,
58 		.name = "displayhcb",
59 	}, {
60 		.id = 0x10,
61 		.name = "fdcdrd",
62 	}, {
63 		.id = 0x11,
64 		.name = "g2dr",
65 	}, {
66 		.id = 0x12,
67 		.name = "host1xdmar",
68 	}, {
69 		.id = 0x13,
70 		.name = "host1xr",
71 	}, {
72 		.id = 0x14,
73 		.name = "idxsrd",
74 	}, {
75 		.id = 0x15,
76 		.name = "mpcorer",
77 	}, {
78 		.id = 0x16,
79 		.name = "mpe_ipred",
80 	}, {
81 		.id = 0x17,
82 		.name = "mpeamemrd",
83 	}, {
84 		.id = 0x18,
85 		.name = "mpecsrd",
86 	}, {
87 		.id = 0x19,
88 		.name = "ppcsahbdmar",
89 	}, {
90 		.id = 0x1a,
91 		.name = "ppcsahbslvr",
92 	}, {
93 		.id = 0x1b,
94 		.name = "texsrd",
95 	}, {
96 		.id = 0x1c,
97 		.name = "vdebsevr",
98 	}, {
99 		.id = 0x1d,
100 		.name = "vdember",
101 	}, {
102 		.id = 0x1e,
103 		.name = "vdemcer",
104 	}, {
105 		.id = 0x1f,
106 		.name = "vdetper",
107 	}, {
108 		.id = 0x20,
109 		.name = "eppu",
110 	}, {
111 		.id = 0x21,
112 		.name = "eppv",
113 	}, {
114 		.id = 0x22,
115 		.name = "eppy",
116 	}, {
117 		.id = 0x23,
118 		.name = "mpeunifbw",
119 	}, {
120 		.id = 0x24,
121 		.name = "viwsb",
122 	}, {
123 		.id = 0x25,
124 		.name = "viwu",
125 	}, {
126 		.id = 0x26,
127 		.name = "viwv",
128 	}, {
129 		.id = 0x27,
130 		.name = "viwy",
131 	}, {
132 		.id = 0x28,
133 		.name = "g2dw",
134 	}, {
135 		.id = 0x29,
136 		.name = "avpcarm7w",
137 	}, {
138 		.id = 0x2a,
139 		.name = "fdcdwr",
140 	}, {
141 		.id = 0x2b,
142 		.name = "host1xw",
143 	}, {
144 		.id = 0x2c,
145 		.name = "ispw",
146 	}, {
147 		.id = 0x2d,
148 		.name = "mpcorew",
149 	}, {
150 		.id = 0x2e,
151 		.name = "mpecswr",
152 	}, {
153 		.id = 0x2f,
154 		.name = "ppcsahbdmaw",
155 	}, {
156 		.id = 0x30,
157 		.name = "ppcsahbslvw",
158 	}, {
159 		.id = 0x31,
160 		.name = "vdebsevw",
161 	}, {
162 		.id = 0x32,
163 		.name = "vdembew",
164 	}, {
165 		.id = 0x33,
166 		.name = "vdetpmw",
167 	},
168 };
169 
170 #define TEGRA20_MC_RESET(_name, _control, _status, _reset, _bit)	\
171 	{								\
172 		.name = #_name,						\
173 		.id = TEGRA20_MC_RESET_##_name,				\
174 		.control = _control,					\
175 		.status = _status,					\
176 		.reset = _reset,					\
177 		.bit = _bit,						\
178 	}
179 
180 static const struct tegra_mc_reset tegra20_mc_resets[] = {
181 	TEGRA20_MC_RESET(AVPC,   0x100, 0x140, 0x104,  0),
182 	TEGRA20_MC_RESET(DC,     0x100, 0x144, 0x104,  1),
183 	TEGRA20_MC_RESET(DCB,    0x100, 0x148, 0x104,  2),
184 	TEGRA20_MC_RESET(EPP,    0x100, 0x14c, 0x104,  3),
185 	TEGRA20_MC_RESET(2D,     0x100, 0x150, 0x104,  4),
186 	TEGRA20_MC_RESET(HC,     0x100, 0x154, 0x104,  5),
187 	TEGRA20_MC_RESET(ISP,    0x100, 0x158, 0x104,  6),
188 	TEGRA20_MC_RESET(MPCORE, 0x100, 0x15c, 0x104,  7),
189 	TEGRA20_MC_RESET(MPEA,   0x100, 0x160, 0x104,  8),
190 	TEGRA20_MC_RESET(MPEB,   0x100, 0x164, 0x104,  9),
191 	TEGRA20_MC_RESET(MPEC,   0x100, 0x168, 0x104, 10),
192 	TEGRA20_MC_RESET(3D,     0x100, 0x16c, 0x104, 11),
193 	TEGRA20_MC_RESET(PPCS,   0x100, 0x170, 0x104, 12),
194 	TEGRA20_MC_RESET(VDE,    0x100, 0x174, 0x104, 13),
195 	TEGRA20_MC_RESET(VI,     0x100, 0x178, 0x104, 14),
196 };
197 
198 static int tegra20_mc_hotreset_assert(struct tegra_mc *mc,
199 				      const struct tegra_mc_reset *rst)
200 {
201 	unsigned long flags;
202 	u32 value;
203 
204 	spin_lock_irqsave(&mc->lock, flags);
205 
206 	value = mc_readl(mc, rst->reset);
207 	mc_writel(mc, value & ~BIT(rst->bit), rst->reset);
208 
209 	spin_unlock_irqrestore(&mc->lock, flags);
210 
211 	return 0;
212 }
213 
214 static int tegra20_mc_hotreset_deassert(struct tegra_mc *mc,
215 					const struct tegra_mc_reset *rst)
216 {
217 	unsigned long flags;
218 	u32 value;
219 
220 	spin_lock_irqsave(&mc->lock, flags);
221 
222 	value = mc_readl(mc, rst->reset);
223 	mc_writel(mc, value | BIT(rst->bit), rst->reset);
224 
225 	spin_unlock_irqrestore(&mc->lock, flags);
226 
227 	return 0;
228 }
229 
230 static int tegra20_mc_block_dma(struct tegra_mc *mc,
231 				const struct tegra_mc_reset *rst)
232 {
233 	unsigned long flags;
234 	u32 value;
235 
236 	spin_lock_irqsave(&mc->lock, flags);
237 
238 	value = mc_readl(mc, rst->control) & ~BIT(rst->bit);
239 	mc_writel(mc, value, rst->control);
240 
241 	spin_unlock_irqrestore(&mc->lock, flags);
242 
243 	return 0;
244 }
245 
246 static bool tegra20_mc_dma_idling(struct tegra_mc *mc,
247 				  const struct tegra_mc_reset *rst)
248 {
249 	return mc_readl(mc, rst->status) == 0;
250 }
251 
252 static int tegra20_mc_reset_status(struct tegra_mc *mc,
253 				   const struct tegra_mc_reset *rst)
254 {
255 	return (mc_readl(mc, rst->reset) & BIT(rst->bit)) == 0;
256 }
257 
258 static int tegra20_mc_unblock_dma(struct tegra_mc *mc,
259 				  const struct tegra_mc_reset *rst)
260 {
261 	unsigned long flags;
262 	u32 value;
263 
264 	spin_lock_irqsave(&mc->lock, flags);
265 
266 	value = mc_readl(mc, rst->control) | BIT(rst->bit);
267 	mc_writel(mc, value, rst->control);
268 
269 	spin_unlock_irqrestore(&mc->lock, flags);
270 
271 	return 0;
272 }
273 
274 static const struct tegra_mc_reset_ops tegra20_mc_reset_ops = {
275 	.hotreset_assert = tegra20_mc_hotreset_assert,
276 	.hotreset_deassert = tegra20_mc_hotreset_deassert,
277 	.block_dma = tegra20_mc_block_dma,
278 	.dma_idling = tegra20_mc_dma_idling,
279 	.unblock_dma = tegra20_mc_unblock_dma,
280 	.reset_status = tegra20_mc_reset_status,
281 };
282 
283 const struct tegra_mc_soc tegra20_mc_soc = {
284 	.clients = tegra20_mc_clients,
285 	.num_clients = ARRAY_SIZE(tegra20_mc_clients),
286 	.num_address_bits = 32,
287 	.client_id_mask = 0x3f,
288 	.intmask = MC_INT_SECURITY_VIOLATION | MC_INT_INVALID_GART_PAGE |
289 		   MC_INT_DECERR_EMEM,
290 	.reset_ops = &tegra20_mc_reset_ops,
291 	.resets = tegra20_mc_resets,
292 	.num_resets = ARRAY_SIZE(tegra20_mc_resets),
293 };
294