blob: bfc0ab8f102ab5ba07cf13d1239d82bfdbc32163 [file] [log] [blame]
Thierry Reding79c7a902014-12-09 22:25:09 -07001/*
Stephen Warren1680d7b2015-10-23 10:50:49 -06002 * Copyright (c) 2014-2015, NVIDIA CORPORATION. All rights reserved.
Thierry Reding79c7a902014-12-09 22:25:09 -07003 *
4 * SPDX-License-Identifier: GPL-2.0
5 */
6
7#define pr_fmt(fmt) "tegra-xusb-padctl: " fmt
8
9#include <common.h>
10#include <errno.h>
Simon Glassbe789092017-07-25 08:29:59 -060011#include <dm/of_access.h>
12#include <dm/ofnode.h>
Thierry Reding79c7a902014-12-09 22:25:09 -070013
Stephen Warren1680d7b2015-10-23 10:50:49 -060014#include "../xusb-padctl-common.h"
15
Thierry Reding79c7a902014-12-09 22:25:09 -070016#include <dt-bindings/pinctrl/pinctrl-tegra-xusb.h>
17
18#define XUSB_PADCTL_ELPG_PROGRAM 0x01c
19#define XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_VCORE_DOWN (1 << 26)
20#define XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN_EARLY (1 << 25)
21#define XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN (1 << 24)
22
23#define XUSB_PADCTL_IOPHY_PLL_P0_CTL1 0x040
24#define XUSB_PADCTL_IOPHY_PLL_P0_CTL1_PLL0_LOCKDET (1 << 19)
25#define XUSB_PADCTL_IOPHY_PLL_P0_CTL1_REFCLK_SEL_MASK (0xf << 12)
26#define XUSB_PADCTL_IOPHY_PLL_P0_CTL1_PLL_RST (1 << 1)
27
28#define XUSB_PADCTL_IOPHY_PLL_P0_CTL2 0x044
29#define XUSB_PADCTL_IOPHY_PLL_P0_CTL2_REFCLKBUF_EN (1 << 6)
30#define XUSB_PADCTL_IOPHY_PLL_P0_CTL2_TXCLKREF_EN (1 << 5)
31#define XUSB_PADCTL_IOPHY_PLL_P0_CTL2_TXCLKREF_SEL (1 << 4)
32
33#define XUSB_PADCTL_IOPHY_PLL_S0_CTL1 0x138
34#define XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL1_LOCKDET (1 << 27)
35#define XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL1_MODE (1 << 24)
36#define XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_PWR_OVRD (1 << 3)
37#define XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_RST (1 << 1)
38#define XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_IDDQ (1 << 0)
39
40#define XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1 0x148
41#define XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1_IDDQ_OVRD (1 << 1)
42#define XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1_IDDQ (1 << 0)
43
44enum tegra124_function {
45 TEGRA124_FUNC_SNPS,
46 TEGRA124_FUNC_XUSB,
47 TEGRA124_FUNC_UART,
48 TEGRA124_FUNC_PCIE,
49 TEGRA124_FUNC_USB3,
50 TEGRA124_FUNC_SATA,
51 TEGRA124_FUNC_RSVD,
52};
53
54static const char *const tegra124_functions[] = {
55 "snps",
56 "xusb",
57 "uart",
58 "pcie",
59 "usb3",
60 "sata",
61 "rsvd",
62};
63
64static const unsigned int tegra124_otg_functions[] = {
65 TEGRA124_FUNC_SNPS,
66 TEGRA124_FUNC_XUSB,
67 TEGRA124_FUNC_UART,
68 TEGRA124_FUNC_RSVD,
69};
70
71static const unsigned int tegra124_usb_functions[] = {
72 TEGRA124_FUNC_SNPS,
73 TEGRA124_FUNC_XUSB,
74};
75
76static const unsigned int tegra124_pci_functions[] = {
77 TEGRA124_FUNC_PCIE,
78 TEGRA124_FUNC_USB3,
79 TEGRA124_FUNC_SATA,
80 TEGRA124_FUNC_RSVD,
81};
82
Thierry Reding79c7a902014-12-09 22:25:09 -070083#define TEGRA124_LANE(_name, _offset, _shift, _mask, _iddq, _funcs) \
84 { \
85 .name = _name, \
86 .offset = _offset, \
87 .shift = _shift, \
88 .mask = _mask, \
89 .iddq = _iddq, \
90 .num_funcs = ARRAY_SIZE(tegra124_##_funcs##_functions), \
91 .funcs = tegra124_##_funcs##_functions, \
92 }
93
94static const struct tegra_xusb_padctl_lane tegra124_lanes[] = {
95 TEGRA124_LANE("otg-0", 0x004, 0, 0x3, 0, otg),
96 TEGRA124_LANE("otg-1", 0x004, 2, 0x3, 0, otg),
97 TEGRA124_LANE("otg-2", 0x004, 4, 0x3, 0, otg),
98 TEGRA124_LANE("ulpi-0", 0x004, 12, 0x1, 0, usb),
99 TEGRA124_LANE("hsic-0", 0x004, 14, 0x1, 0, usb),
100 TEGRA124_LANE("hsic-1", 0x004, 15, 0x1, 0, usb),
101 TEGRA124_LANE("pcie-0", 0x134, 16, 0x3, 1, pci),
102 TEGRA124_LANE("pcie-1", 0x134, 18, 0x3, 2, pci),
103 TEGRA124_LANE("pcie-2", 0x134, 20, 0x3, 3, pci),
104 TEGRA124_LANE("pcie-3", 0x134, 22, 0x3, 4, pci),
105 TEGRA124_LANE("pcie-4", 0x134, 24, 0x3, 5, pci),
106 TEGRA124_LANE("sata-0", 0x134, 26, 0x3, 6, pci),
107};
108
Thierry Reding79c7a902014-12-09 22:25:09 -0700109static int tegra_xusb_padctl_enable(struct tegra_xusb_padctl *padctl)
110{
111 u32 value;
112
113 if (padctl->enable++ > 0)
114 return 0;
115
116 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
117 value &= ~XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN;
118 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
119
120 udelay(100);
121
122 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
123 value &= ~XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN_EARLY;
124 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
125
126 udelay(100);
127
128 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
129 value &= ~XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_VCORE_DOWN;
130 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
131
132 return 0;
133}
134
135static int tegra_xusb_padctl_disable(struct tegra_xusb_padctl *padctl)
136{
137 u32 value;
138
139 if (padctl->enable == 0) {
Masahiro Yamada9b643e32017-09-16 14:10:41 +0900140 pr_err("unbalanced enable/disable");
Thierry Reding79c7a902014-12-09 22:25:09 -0700141 return 0;
142 }
143
144 if (--padctl->enable > 0)
145 return 0;
146
147 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
148 value |= XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_VCORE_DOWN;
149 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
150
151 udelay(100);
152
153 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
154 value |= XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN_EARLY;
155 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
156
157 udelay(100);
158
159 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
160 value |= XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN;
161 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
162
163 return 0;
164}
165
166static int phy_prepare(struct tegra_xusb_phy *phy)
167{
168 return tegra_xusb_padctl_enable(phy->padctl);
169}
170
171static int phy_unprepare(struct tegra_xusb_phy *phy)
172{
173 return tegra_xusb_padctl_disable(phy->padctl);
174}
175
176static int pcie_phy_enable(struct tegra_xusb_phy *phy)
177{
178 struct tegra_xusb_padctl *padctl = phy->padctl;
179 int err = -ETIMEDOUT;
180 unsigned long start;
181 u32 value;
182
183 value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_P0_CTL1);
184 value &= ~XUSB_PADCTL_IOPHY_PLL_P0_CTL1_REFCLK_SEL_MASK;
185 padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_P0_CTL1);
186
187 value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_P0_CTL2);
188 value |= XUSB_PADCTL_IOPHY_PLL_P0_CTL2_REFCLKBUF_EN |
189 XUSB_PADCTL_IOPHY_PLL_P0_CTL2_TXCLKREF_EN |
190 XUSB_PADCTL_IOPHY_PLL_P0_CTL2_TXCLKREF_SEL;
191 padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_P0_CTL2);
192
193 value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_P0_CTL1);
194 value |= XUSB_PADCTL_IOPHY_PLL_P0_CTL1_PLL_RST;
195 padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_P0_CTL1);
196
197 start = get_timer(0);
198
199 while (get_timer(start) < 50) {
200 value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_P0_CTL1);
201 if (value & XUSB_PADCTL_IOPHY_PLL_P0_CTL1_PLL0_LOCKDET) {
202 err = 0;
203 break;
204 }
205 }
206
207 return err;
208}
209
210static int pcie_phy_disable(struct tegra_xusb_phy *phy)
211{
212 struct tegra_xusb_padctl *padctl = phy->padctl;
213 u32 value;
214
215 value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_P0_CTL1);
216 value &= ~XUSB_PADCTL_IOPHY_PLL_P0_CTL1_PLL_RST;
217 padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_P0_CTL1);
218
219 return 0;
220}
221
222static int sata_phy_enable(struct tegra_xusb_phy *phy)
223{
224 struct tegra_xusb_padctl *padctl = phy->padctl;
225 int err = -ETIMEDOUT;
226 unsigned long start;
227 u32 value;
228
229 value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1);
230 value &= ~XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1_IDDQ_OVRD;
231 value &= ~XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1_IDDQ;
232 padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1);
233
234 value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
235 value &= ~XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_PWR_OVRD;
236 value &= ~XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_IDDQ;
237 padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
238
239 value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
240 value |= XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL1_MODE;
241 padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
242
243 value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
244 value |= XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_RST;
245 padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
246
247 start = get_timer(0);
248
249 while (get_timer(start) < 50) {
250 value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
251 if (value & XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL1_LOCKDET) {
252 err = 0;
253 break;
254 }
255 }
256
257 return err;
258}
259
260static int sata_phy_disable(struct tegra_xusb_phy *phy)
261{
262 struct tegra_xusb_padctl *padctl = phy->padctl;
263 u32 value;
264
265 value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
266 value &= ~XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_RST;
267 padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
268
269 value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
270 value &= ~XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL1_MODE;
271 padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
272
273 value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
274 value |= XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_PWR_OVRD;
275 value |= XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_IDDQ;
276 padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
277
278 value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1);
279 value |= ~XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1_IDDQ_OVRD;
280 value |= ~XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1_IDDQ;
281 padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1);
282
283 return 0;
284}
285
286static const struct tegra_xusb_phy_ops pcie_phy_ops = {
287 .prepare = phy_prepare,
288 .enable = pcie_phy_enable,
289 .disable = pcie_phy_disable,
290 .unprepare = phy_unprepare,
291};
292
293static const struct tegra_xusb_phy_ops sata_phy_ops = {
294 .prepare = phy_prepare,
295 .enable = sata_phy_enable,
296 .disable = sata_phy_disable,
297 .unprepare = phy_unprepare,
298};
299
Stephen Warren095e6582015-10-23 10:50:50 -0600300static struct tegra_xusb_phy tegra124_phys[] = {
301 {
302 .type = TEGRA_XUSB_PADCTL_PCIE,
303 .ops = &pcie_phy_ops,
304 .padctl = &padctl,
305 },
306 {
307 .type = TEGRA_XUSB_PADCTL_SATA,
308 .ops = &sata_phy_ops,
309 .padctl = &padctl,
Thierry Reding79c7a902014-12-09 22:25:09 -0700310 },
311};
312
Stephen Warren095e6582015-10-23 10:50:50 -0600313static const struct tegra_xusb_padctl_soc tegra124_socdata = {
314 .lanes = tegra124_lanes,
315 .num_lanes = ARRAY_SIZE(tegra124_lanes),
316 .functions = tegra124_functions,
317 .num_functions = ARRAY_SIZE(tegra124_functions),
318 .phys = tegra124_phys,
319 .num_phys = ARRAY_SIZE(tegra124_phys),
320};
Thierry Reding79c7a902014-12-09 22:25:09 -0700321
Simon Glassbe789092017-07-25 08:29:59 -0600322void tegra_xusb_padctl_init(void)
Thierry Reding79c7a902014-12-09 22:25:09 -0700323{
Simon Glassbe789092017-07-25 08:29:59 -0600324 ofnode nodes[1];
325 int count = 0;
326 int ret;
Thierry Reding79c7a902014-12-09 22:25:09 -0700327
Simon Glassbe789092017-07-25 08:29:59 -0600328 debug("%s: start\n", __func__);
329 if (of_live_active()) {
330 struct device_node *np = of_find_compatible_node(NULL, NULL,
331 "nvidia,tegra124-xusb-padctl");
332
333 debug("np=%p\n", np);
334 if (np) {
335 nodes[0] = np_to_ofnode(np);
336 count = 1;
337 }
338 } else {
339 int node_offsets[1];
340 int i;
341
342 count = fdtdec_find_aliases_for_id(gd->fdt_blob, "padctl",
343 COMPAT_NVIDIA_TEGRA124_XUSB_PADCTL,
344 node_offsets, ARRAY_SIZE(node_offsets));
345 for (i = 0; i < count; i++)
346 nodes[i] = offset_to_ofnode(node_offsets[i]);
347 }
348
349 ret = tegra_xusb_process_nodes(nodes, count, &tegra124_socdata);
350 debug("%s: done, ret=%d\n", __func__, ret);
Thierry Reding79c7a902014-12-09 22:25:09 -0700351}