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87d0bab2 HD |
1 | /* |
2 | * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. | |
3 | * Copyright (C) 2011 Google, Inc. | |
4 | * | |
5 | * Author: | |
6 | * Jay Cheng <jacheng@nvidia.com> | |
7 | * James Wylder <james.wylder@motorola.com> | |
8 | * Benoit Goby <benoit@android.com> | |
9 | * Colin Cross <ccross@android.com> | |
10 | * Hiroshi DOYU <hdoyu@nvidia.com> | |
11 | * | |
12 | * This software is licensed under the terms of the GNU General Public | |
13 | * License version 2, as published by the Free Software Foundation, and | |
14 | * may be copied, distributed, and modified under those terms. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | */ | |
22 | ||
903b33e0 | 23 | #include <linux/err.h> |
87d0bab2 HD |
24 | #include <linux/kernel.h> |
25 | #include <linux/module.h> | |
26 | #include <linux/platform_device.h> | |
27 | #include <linux/io.h> | |
306a7f91 TR |
28 | |
29 | #include <soc/tegra/ahb.h> | |
87d0bab2 HD |
30 | |
31 | #define DRV_NAME "tegra-ahb" | |
32 | ||
33 | #define AHB_ARBITRATION_DISABLE 0x00 | |
34 | #define AHB_ARBITRATION_PRIORITY_CTRL 0x04 | |
35 | #define AHB_PRIORITY_WEIGHT(x) (((x) & 0x7) << 29) | |
36 | #define PRIORITY_SELECT_USB BIT(6) | |
37 | #define PRIORITY_SELECT_USB2 BIT(18) | |
38 | #define PRIORITY_SELECT_USB3 BIT(17) | |
39 | ||
40 | #define AHB_GIZMO_AHB_MEM 0x0c | |
41 | #define ENB_FAST_REARBITRATE BIT(2) | |
42 | #define DONT_SPLIT_AHB_WR BIT(7) | |
43 | ||
44 | #define AHB_GIZMO_APB_DMA 0x10 | |
45 | #define AHB_GIZMO_IDE 0x18 | |
46 | #define AHB_GIZMO_USB 0x1c | |
47 | #define AHB_GIZMO_AHB_XBAR_BRIDGE 0x20 | |
48 | #define AHB_GIZMO_CPU_AHB_BRIDGE 0x24 | |
49 | #define AHB_GIZMO_COP_AHB_BRIDGE 0x28 | |
50 | #define AHB_GIZMO_XBAR_APB_CTLR 0x2c | |
51 | #define AHB_GIZMO_VCP_AHB_BRIDGE 0x30 | |
52 | #define AHB_GIZMO_NAND 0x3c | |
53 | #define AHB_GIZMO_SDMMC4 0x44 | |
54 | #define AHB_GIZMO_XIO 0x48 | |
55 | #define AHB_GIZMO_BSEV 0x60 | |
56 | #define AHB_GIZMO_BSEA 0x70 | |
57 | #define AHB_GIZMO_NOR 0x74 | |
58 | #define AHB_GIZMO_USB2 0x78 | |
59 | #define AHB_GIZMO_USB3 0x7c | |
60 | #define IMMEDIATE BIT(18) | |
61 | ||
62 | #define AHB_GIZMO_SDMMC1 0x80 | |
63 | #define AHB_GIZMO_SDMMC2 0x84 | |
64 | #define AHB_GIZMO_SDMMC3 0x88 | |
65 | #define AHB_MEM_PREFETCH_CFG_X 0xd8 | |
66 | #define AHB_ARBITRATION_XBAR_CTRL 0xdc | |
67 | #define AHB_MEM_PREFETCH_CFG3 0xe0 | |
68 | #define AHB_MEM_PREFETCH_CFG4 0xe4 | |
69 | #define AHB_MEM_PREFETCH_CFG1 0xec | |
70 | #define AHB_MEM_PREFETCH_CFG2 0xf0 | |
71 | #define PREFETCH_ENB BIT(31) | |
72 | #define MST_ID(x) (((x) & 0x1f) << 26) | |
73 | #define AHBDMA_MST_ID MST_ID(5) | |
74 | #define USB_MST_ID MST_ID(6) | |
75 | #define USB2_MST_ID MST_ID(18) | |
76 | #define USB3_MST_ID MST_ID(17) | |
77 | #define ADDR_BNDRY(x) (((x) & 0xf) << 21) | |
78 | #define INACTIVITY_TIMEOUT(x) (((x) & 0xffff) << 0) | |
79 | ||
80 | #define AHB_ARBITRATION_AHB_MEM_WRQUE_MST_ID 0xf8 | |
81 | ||
89c788ba HD |
82 | #define AHB_ARBITRATION_XBAR_CTRL_SMMU_INIT_DONE BIT(17) |
83 | ||
84 | static struct platform_driver tegra_ahb_driver; | |
85 | ||
87d0bab2 HD |
86 | static const u32 tegra_ahb_gizmo[] = { |
87 | AHB_ARBITRATION_DISABLE, | |
88 | AHB_ARBITRATION_PRIORITY_CTRL, | |
89 | AHB_GIZMO_AHB_MEM, | |
90 | AHB_GIZMO_APB_DMA, | |
91 | AHB_GIZMO_IDE, | |
92 | AHB_GIZMO_USB, | |
93 | AHB_GIZMO_AHB_XBAR_BRIDGE, | |
94 | AHB_GIZMO_CPU_AHB_BRIDGE, | |
95 | AHB_GIZMO_COP_AHB_BRIDGE, | |
96 | AHB_GIZMO_XBAR_APB_CTLR, | |
97 | AHB_GIZMO_VCP_AHB_BRIDGE, | |
98 | AHB_GIZMO_NAND, | |
99 | AHB_GIZMO_SDMMC4, | |
100 | AHB_GIZMO_XIO, | |
101 | AHB_GIZMO_BSEV, | |
102 | AHB_GIZMO_BSEA, | |
103 | AHB_GIZMO_NOR, | |
104 | AHB_GIZMO_USB2, | |
105 | AHB_GIZMO_USB3, | |
106 | AHB_GIZMO_SDMMC1, | |
107 | AHB_GIZMO_SDMMC2, | |
108 | AHB_GIZMO_SDMMC3, | |
109 | AHB_MEM_PREFETCH_CFG_X, | |
110 | AHB_ARBITRATION_XBAR_CTRL, | |
111 | AHB_MEM_PREFETCH_CFG3, | |
112 | AHB_MEM_PREFETCH_CFG4, | |
113 | AHB_MEM_PREFETCH_CFG1, | |
114 | AHB_MEM_PREFETCH_CFG2, | |
115 | AHB_ARBITRATION_AHB_MEM_WRQUE_MST_ID, | |
116 | }; | |
117 | ||
118 | struct tegra_ahb { | |
119 | void __iomem *regs; | |
120 | struct device *dev; | |
121 | u32 ctx[0]; | |
122 | }; | |
123 | ||
124 | static inline u32 gizmo_readl(struct tegra_ahb *ahb, u32 offset) | |
125 | { | |
126 | return readl(ahb->regs + offset); | |
127 | } | |
128 | ||
129 | static inline void gizmo_writel(struct tegra_ahb *ahb, u32 value, u32 offset) | |
130 | { | |
131 | writel(value, ahb->regs + offset); | |
132 | } | |
133 | ||
b44bf43b | 134 | #ifdef CONFIG_TEGRA_IOMMU_SMMU |
89c788ba HD |
135 | static int tegra_ahb_match_by_smmu(struct device *dev, void *data) |
136 | { | |
137 | struct tegra_ahb *ahb = dev_get_drvdata(dev); | |
138 | struct device_node *dn = data; | |
139 | ||
140 | return (ahb->dev->of_node == dn) ? 1 : 0; | |
141 | } | |
142 | ||
143 | int tegra_ahb_enable_smmu(struct device_node *dn) | |
144 | { | |
145 | struct device *dev; | |
146 | u32 val; | |
147 | struct tegra_ahb *ahb; | |
148 | ||
149 | dev = driver_find_device(&tegra_ahb_driver.driver, NULL, dn, | |
150 | tegra_ahb_match_by_smmu); | |
151 | if (!dev) | |
152 | return -EPROBE_DEFER; | |
153 | ahb = dev_get_drvdata(dev); | |
154 | val = gizmo_readl(ahb, AHB_ARBITRATION_XBAR_CTRL); | |
155 | val |= AHB_ARBITRATION_XBAR_CTRL_SMMU_INIT_DONE; | |
156 | gizmo_writel(ahb, val, AHB_ARBITRATION_XBAR_CTRL); | |
157 | return 0; | |
158 | } | |
159 | EXPORT_SYMBOL(tegra_ahb_enable_smmu); | |
160 | #endif | |
161 | ||
2c36af0e | 162 | #ifdef CONFIG_PM |
87d0bab2 HD |
163 | static int tegra_ahb_suspend(struct device *dev) |
164 | { | |
165 | int i; | |
166 | struct tegra_ahb *ahb = dev_get_drvdata(dev); | |
167 | ||
168 | for (i = 0; i < ARRAY_SIZE(tegra_ahb_gizmo); i++) | |
169 | ahb->ctx[i] = gizmo_readl(ahb, tegra_ahb_gizmo[i]); | |
170 | return 0; | |
171 | } | |
172 | ||
173 | static int tegra_ahb_resume(struct device *dev) | |
174 | { | |
175 | int i; | |
176 | struct tegra_ahb *ahb = dev_get_drvdata(dev); | |
177 | ||
178 | for (i = 0; i < ARRAY_SIZE(tegra_ahb_gizmo); i++) | |
179 | gizmo_writel(ahb, ahb->ctx[i], tegra_ahb_gizmo[i]); | |
180 | return 0; | |
181 | } | |
f1101749 | 182 | #endif |
87d0bab2 HD |
183 | |
184 | static UNIVERSAL_DEV_PM_OPS(tegra_ahb_pm, | |
185 | tegra_ahb_suspend, | |
186 | tegra_ahb_resume, NULL); | |
187 | ||
188 | static void tegra_ahb_gizmo_init(struct tegra_ahb *ahb) | |
189 | { | |
190 | u32 val; | |
191 | ||
192 | val = gizmo_readl(ahb, AHB_GIZMO_AHB_MEM); | |
193 | val |= ENB_FAST_REARBITRATE | IMMEDIATE | DONT_SPLIT_AHB_WR; | |
194 | gizmo_writel(ahb, val, AHB_GIZMO_AHB_MEM); | |
195 | ||
196 | val = gizmo_readl(ahb, AHB_GIZMO_USB); | |
197 | val |= IMMEDIATE; | |
198 | gizmo_writel(ahb, val, AHB_GIZMO_USB); | |
199 | ||
200 | val = gizmo_readl(ahb, AHB_GIZMO_USB2); | |
201 | val |= IMMEDIATE; | |
202 | gizmo_writel(ahb, val, AHB_GIZMO_USB2); | |
203 | ||
204 | val = gizmo_readl(ahb, AHB_GIZMO_USB3); | |
205 | val |= IMMEDIATE; | |
206 | gizmo_writel(ahb, val, AHB_GIZMO_USB3); | |
207 | ||
208 | val = gizmo_readl(ahb, AHB_ARBITRATION_PRIORITY_CTRL); | |
209 | val |= PRIORITY_SELECT_USB | | |
210 | PRIORITY_SELECT_USB2 | | |
211 | PRIORITY_SELECT_USB3 | | |
212 | AHB_PRIORITY_WEIGHT(7); | |
213 | gizmo_writel(ahb, val, AHB_ARBITRATION_PRIORITY_CTRL); | |
214 | ||
215 | val = gizmo_readl(ahb, AHB_MEM_PREFETCH_CFG1); | |
216 | val &= ~MST_ID(~0); | |
217 | val |= PREFETCH_ENB | | |
218 | AHBDMA_MST_ID | | |
219 | ADDR_BNDRY(0xc) | | |
220 | INACTIVITY_TIMEOUT(0x1000); | |
221 | gizmo_writel(ahb, val, AHB_MEM_PREFETCH_CFG1); | |
222 | ||
223 | val = gizmo_readl(ahb, AHB_MEM_PREFETCH_CFG2); | |
224 | val &= ~MST_ID(~0); | |
225 | val |= PREFETCH_ENB | | |
226 | USB_MST_ID | | |
227 | ADDR_BNDRY(0xc) | | |
228 | INACTIVITY_TIMEOUT(0x1000); | |
229 | gizmo_writel(ahb, val, AHB_MEM_PREFETCH_CFG2); | |
230 | ||
231 | val = gizmo_readl(ahb, AHB_MEM_PREFETCH_CFG3); | |
232 | val &= ~MST_ID(~0); | |
233 | val |= PREFETCH_ENB | | |
234 | USB3_MST_ID | | |
235 | ADDR_BNDRY(0xc) | | |
236 | INACTIVITY_TIMEOUT(0x1000); | |
237 | gizmo_writel(ahb, val, AHB_MEM_PREFETCH_CFG3); | |
238 | ||
239 | val = gizmo_readl(ahb, AHB_MEM_PREFETCH_CFG4); | |
240 | val &= ~MST_ID(~0); | |
241 | val |= PREFETCH_ENB | | |
242 | USB2_MST_ID | | |
243 | ADDR_BNDRY(0xc) | | |
244 | INACTIVITY_TIMEOUT(0x1000); | |
245 | gizmo_writel(ahb, val, AHB_MEM_PREFETCH_CFG4); | |
246 | } | |
247 | ||
c571b211 | 248 | static int tegra_ahb_probe(struct platform_device *pdev) |
87d0bab2 HD |
249 | { |
250 | struct resource *res; | |
251 | struct tegra_ahb *ahb; | |
252 | size_t bytes; | |
253 | ||
254 | bytes = sizeof(*ahb) + sizeof(u32) * ARRAY_SIZE(tegra_ahb_gizmo); | |
255 | ahb = devm_kzalloc(&pdev->dev, bytes, GFP_KERNEL); | |
256 | if (!ahb) | |
257 | return -ENOMEM; | |
258 | ||
259 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
903b33e0 TR |
260 | ahb->regs = devm_ioremap_resource(&pdev->dev, res); |
261 | if (IS_ERR(ahb->regs)) | |
262 | return PTR_ERR(ahb->regs); | |
87d0bab2 HD |
263 | |
264 | ahb->dev = &pdev->dev; | |
265 | platform_set_drvdata(pdev, ahb); | |
266 | tegra_ahb_gizmo_init(ahb); | |
267 | return 0; | |
268 | } | |
269 | ||
c571b211 | 270 | static const struct of_device_id tegra_ahb_of_match[] = { |
87d0bab2 HD |
271 | { .compatible = "nvidia,tegra30-ahb", }, |
272 | { .compatible = "nvidia,tegra20-ahb", }, | |
273 | {}, | |
274 | }; | |
275 | ||
276 | static struct platform_driver tegra_ahb_driver = { | |
277 | .probe = tegra_ahb_probe, | |
87d0bab2 HD |
278 | .driver = { |
279 | .name = DRV_NAME, | |
280 | .owner = THIS_MODULE, | |
281 | .of_match_table = tegra_ahb_of_match, | |
282 | .pm = &tegra_ahb_pm, | |
283 | }, | |
284 | }; | |
285 | module_platform_driver(tegra_ahb_driver); | |
286 | ||
287 | MODULE_AUTHOR("Hiroshi DOYU <hdoyu@nvidia.com>"); | |
288 | MODULE_DESCRIPTION("Tegra AHB driver"); | |
289 | MODULE_LICENSE("GPL v2"); | |
290 | MODULE_ALIAS("platform:" DRV_NAME); |