1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 2011 The Chromium OS Authors.
4 */
5
6 /* Tegra20 high-level function multiplexing */
7 #include <common.h>
8 #include <log.h>
9 #include <asm/arch/clock.h>
10 #include <asm/arch/funcmux.h>
11 #include <asm/arch/pinmux.h>
12
13 /*
14 * The PINMUX macro is used to set up pinmux tables.
15 */
16 #define PINMUX(grp, mux, pupd, tri) \
17 {PMUX_PINGRP_##grp, PMUX_FUNC_##mux, PMUX_PULL_##pupd, PMUX_TRI_##tri}
18
19 static const struct pmux_pingrp_config disp1_default[] = {
20 PINMUX(LDI, DISPA, NORMAL, NORMAL),
21 PINMUX(LHP0, DISPA, NORMAL, NORMAL),
22 PINMUX(LHP1, DISPA, NORMAL, NORMAL),
23 PINMUX(LHP2, DISPA, NORMAL, NORMAL),
24 PINMUX(LHS, DISPA, NORMAL, NORMAL),
25 PINMUX(LM0, RSVD4, NORMAL, NORMAL),
26 PINMUX(LPP, DISPA, NORMAL, NORMAL),
27 PINMUX(LPW0, DISPA, NORMAL, NORMAL),
28 PINMUX(LPW2, DISPA, NORMAL, NORMAL),
29 PINMUX(LSC0, DISPA, NORMAL, NORMAL),
30 PINMUX(LSPI, DISPA, NORMAL, NORMAL),
31 PINMUX(LVP1, DISPA, NORMAL, NORMAL),
32 PINMUX(LVS, DISPA, NORMAL, NORMAL),
33 PINMUX(SLXD, SPDIF, NORMAL, NORMAL),
34 };
35
36
funcmux_select(enum periph_id id,int config)37 int funcmux_select(enum periph_id id, int config)
38 {
39 int bad_config = config != FUNCMUX_DEFAULT;
40
41 switch (id) {
42 case PERIPH_ID_UART1:
43 switch (config) {
44 case FUNCMUX_UART1_IRRX_IRTX:
45 pinmux_set_func(PMUX_PINGRP_IRRX, PMUX_FUNC_UARTA);
46 pinmux_set_func(PMUX_PINGRP_IRTX, PMUX_FUNC_UARTA);
47 pinmux_tristate_disable(PMUX_PINGRP_IRRX);
48 pinmux_tristate_disable(PMUX_PINGRP_IRTX);
49 break;
50 case FUNCMUX_UART1_UAA_UAB:
51 pinmux_set_func(PMUX_PINGRP_UAA, PMUX_FUNC_UARTA);
52 pinmux_set_func(PMUX_PINGRP_UAB, PMUX_FUNC_UARTA);
53 pinmux_tristate_disable(PMUX_PINGRP_UAA);
54 pinmux_tristate_disable(PMUX_PINGRP_UAB);
55 bad_config = 0;
56 break;
57 case FUNCMUX_UART1_GPU:
58 pinmux_set_func(PMUX_PINGRP_GPU, PMUX_FUNC_UARTA);
59 pinmux_tristate_disable(PMUX_PINGRP_GPU);
60 bad_config = 0;
61 break;
62 case FUNCMUX_UART1_SDIO1:
63 pinmux_set_func(PMUX_PINGRP_SDIO1, PMUX_FUNC_UARTA);
64 pinmux_tristate_disable(PMUX_PINGRP_SDIO1);
65 bad_config = 0;
66 break;
67 }
68 if (!bad_config) {
69 /*
70 * Tegra appears to boot with function UARTA pre-
71 * selected on mux group SDB. If two mux groups are
72 * both set to the same function, it's unclear which
73 * group's pins drive the RX signals into the HW.
74 * For UARTA, SDB certainly overrides group IRTX in
75 * practice. To solve this, configure some alternative
76 * function on SDB to avoid the conflict. Also, tri-
77 * state the group to avoid driving any signal onto it
78 * until we know what's connected.
79 */
80 pinmux_tristate_enable(PMUX_PINGRP_SDB);
81 pinmux_set_func(PMUX_PINGRP_SDB, PMUX_FUNC_SDIO3);
82 }
83 break;
84
85 case PERIPH_ID_UART2:
86 if (config == FUNCMUX_UART2_UAD) {
87 pinmux_set_func(PMUX_PINGRP_UAD, PMUX_FUNC_UARTB);
88 pinmux_tristate_disable(PMUX_PINGRP_UAD);
89 }
90 break;
91
92 case PERIPH_ID_UART4:
93 if (config == FUNCMUX_UART4_GMC) {
94 pinmux_set_func(PMUX_PINGRP_GMC, PMUX_FUNC_UARTD);
95 pinmux_tristate_disable(PMUX_PINGRP_GMC);
96 }
97 break;
98
99 case PERIPH_ID_DVC_I2C:
100 /* there is only one selection, pinmux_config is ignored */
101 if (config == FUNCMUX_DVC_I2CP) {
102 pinmux_set_func(PMUX_PINGRP_I2CP, PMUX_FUNC_I2C);
103 pinmux_tristate_disable(PMUX_PINGRP_I2CP);
104 }
105 break;
106
107 case PERIPH_ID_I2C1:
108 /* support pinmux_config of 0 for now, */
109 if (config == FUNCMUX_I2C1_RM) {
110 pinmux_set_func(PMUX_PINGRP_RM, PMUX_FUNC_I2C);
111 pinmux_tristate_disable(PMUX_PINGRP_RM);
112 }
113 break;
114 case PERIPH_ID_I2C2: /* I2C2 */
115 switch (config) {
116 case FUNCMUX_I2C2_DDC: /* DDC pin group, select I2C2 */
117 pinmux_set_func(PMUX_PINGRP_DDC, PMUX_FUNC_I2C2);
118 /* PTA to HDMI */
119 pinmux_set_func(PMUX_PINGRP_PTA, PMUX_FUNC_HDMI);
120 pinmux_tristate_disable(PMUX_PINGRP_DDC);
121 break;
122 case FUNCMUX_I2C2_PTA: /* PTA pin group, select I2C2 */
123 pinmux_set_func(PMUX_PINGRP_PTA, PMUX_FUNC_I2C2);
124 /* set DDC_SEL to RSVDx (RSVD2 works for now) */
125 pinmux_set_func(PMUX_PINGRP_DDC, PMUX_FUNC_RSVD2);
126 pinmux_tristate_disable(PMUX_PINGRP_PTA);
127 bad_config = 0;
128 break;
129 }
130 break;
131 case PERIPH_ID_I2C3: /* I2C3 */
132 /* support pinmux_config of 0 for now */
133 if (config == FUNCMUX_I2C3_DTF) {
134 pinmux_set_func(PMUX_PINGRP_DTF, PMUX_FUNC_I2C3);
135 pinmux_tristate_disable(PMUX_PINGRP_DTF);
136 }
137 break;
138
139 case PERIPH_ID_SDMMC1:
140 if (config == FUNCMUX_SDMMC1_SDIO1_4BIT) {
141 pinmux_set_func(PMUX_PINGRP_SDIO1, PMUX_FUNC_SDIO1);
142 pinmux_tristate_disable(PMUX_PINGRP_SDIO1);
143 }
144 break;
145
146 case PERIPH_ID_SDMMC2:
147 if (config == FUNCMUX_SDMMC2_DTA_DTD_8BIT) {
148 pinmux_set_func(PMUX_PINGRP_DTA, PMUX_FUNC_SDIO2);
149 pinmux_set_func(PMUX_PINGRP_DTD, PMUX_FUNC_SDIO2);
150
151 pinmux_tristate_disable(PMUX_PINGRP_DTA);
152 pinmux_tristate_disable(PMUX_PINGRP_DTD);
153 }
154 break;
155
156 case PERIPH_ID_SDMMC3:
157 switch (config) {
158 case FUNCMUX_SDMMC3_SDB_SLXA_8BIT:
159 pinmux_set_func(PMUX_PINGRP_SLXA, PMUX_FUNC_SDIO3);
160 pinmux_set_func(PMUX_PINGRP_SLXC, PMUX_FUNC_SDIO3);
161 pinmux_set_func(PMUX_PINGRP_SLXD, PMUX_FUNC_SDIO3);
162 pinmux_set_func(PMUX_PINGRP_SLXK, PMUX_FUNC_SDIO3);
163
164 pinmux_tristate_disable(PMUX_PINGRP_SLXA);
165 pinmux_tristate_disable(PMUX_PINGRP_SLXC);
166 pinmux_tristate_disable(PMUX_PINGRP_SLXD);
167 pinmux_tristate_disable(PMUX_PINGRP_SLXK);
168 /* fall through */
169
170 case FUNCMUX_SDMMC3_SDB_4BIT:
171 pinmux_set_func(PMUX_PINGRP_SDB, PMUX_FUNC_SDIO3);
172 pinmux_set_func(PMUX_PINGRP_SDC, PMUX_FUNC_SDIO3);
173 pinmux_set_func(PMUX_PINGRP_SDD, PMUX_FUNC_SDIO3);
174
175 pinmux_tristate_disable(PMUX_PINGRP_SDB);
176 pinmux_tristate_disable(PMUX_PINGRP_SDC);
177 pinmux_tristate_disable(PMUX_PINGRP_SDD);
178 bad_config = 0;
179 break;
180 }
181 break;
182
183 case PERIPH_ID_SDMMC4:
184 switch (config) {
185 case FUNCMUX_SDMMC4_ATC_ATD_8BIT:
186 pinmux_set_func(PMUX_PINGRP_ATC, PMUX_FUNC_SDIO4);
187 pinmux_set_func(PMUX_PINGRP_ATD, PMUX_FUNC_SDIO4);
188
189 pinmux_tristate_disable(PMUX_PINGRP_ATC);
190 pinmux_tristate_disable(PMUX_PINGRP_ATD);
191 break;
192
193 case FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT:
194 pinmux_set_func(PMUX_PINGRP_GME, PMUX_FUNC_SDIO4);
195 pinmux_tristate_disable(PMUX_PINGRP_GME);
196 /* fall through */
197
198 case FUNCMUX_SDMMC4_ATB_GMA_4_BIT:
199 pinmux_set_func(PMUX_PINGRP_ATB, PMUX_FUNC_SDIO4);
200 pinmux_set_func(PMUX_PINGRP_GMA, PMUX_FUNC_SDIO4);
201
202 pinmux_tristate_disable(PMUX_PINGRP_ATB);
203 pinmux_tristate_disable(PMUX_PINGRP_GMA);
204 bad_config = 0;
205 break;
206 }
207 break;
208
209 case PERIPH_ID_KBC:
210 if (config == FUNCMUX_DEFAULT) {
211 enum pmux_pingrp grp[] = {PMUX_PINGRP_KBCA,
212 PMUX_PINGRP_KBCB, PMUX_PINGRP_KBCC,
213 PMUX_PINGRP_KBCD, PMUX_PINGRP_KBCE,
214 PMUX_PINGRP_KBCF};
215 int i;
216
217 for (i = 0; i < ARRAY_SIZE(grp); i++) {
218 pinmux_tristate_disable(grp[i]);
219 pinmux_set_func(grp[i], PMUX_FUNC_KBC);
220 pinmux_set_pullupdown(grp[i], PMUX_PULL_UP);
221 }
222 }
223 break;
224
225 case PERIPH_ID_USB2:
226 if (config == FUNCMUX_USB2_ULPI) {
227 pinmux_set_func(PMUX_PINGRP_UAA, PMUX_FUNC_ULPI);
228 pinmux_set_func(PMUX_PINGRP_UAB, PMUX_FUNC_ULPI);
229 pinmux_set_func(PMUX_PINGRP_UDA, PMUX_FUNC_ULPI);
230
231 pinmux_tristate_disable(PMUX_PINGRP_UAA);
232 pinmux_tristate_disable(PMUX_PINGRP_UAB);
233 pinmux_tristate_disable(PMUX_PINGRP_UDA);
234 }
235 break;
236
237 case PERIPH_ID_SPI1:
238 if (config == FUNCMUX_SPI1_GMC_GMD) {
239 pinmux_set_func(PMUX_PINGRP_GMC, PMUX_FUNC_SFLASH);
240 pinmux_set_func(PMUX_PINGRP_GMD, PMUX_FUNC_SFLASH);
241
242 pinmux_tristate_disable(PMUX_PINGRP_GMC);
243 pinmux_tristate_disable(PMUX_PINGRP_GMD);
244 }
245 break;
246
247 case PERIPH_ID_NDFLASH:
248 switch (config) {
249 case FUNCMUX_NDFLASH_ATC:
250 pinmux_set_func(PMUX_PINGRP_ATC, PMUX_FUNC_NAND);
251 pinmux_tristate_disable(PMUX_PINGRP_ATC);
252 break;
253 case FUNCMUX_NDFLASH_KBC_8_BIT:
254 pinmux_set_func(PMUX_PINGRP_KBCA, PMUX_FUNC_NAND);
255 pinmux_set_func(PMUX_PINGRP_KBCB, PMUX_FUNC_NAND);
256 pinmux_set_func(PMUX_PINGRP_KBCC, PMUX_FUNC_NAND);
257 pinmux_set_func(PMUX_PINGRP_KBCD, PMUX_FUNC_NAND);
258 pinmux_set_func(PMUX_PINGRP_KBCE, PMUX_FUNC_NAND);
259 pinmux_set_func(PMUX_PINGRP_KBCF, PMUX_FUNC_NAND);
260
261 pinmux_tristate_disable(PMUX_PINGRP_KBCA);
262 pinmux_tristate_disable(PMUX_PINGRP_KBCB);
263 pinmux_tristate_disable(PMUX_PINGRP_KBCC);
264 pinmux_tristate_disable(PMUX_PINGRP_KBCD);
265 pinmux_tristate_disable(PMUX_PINGRP_KBCE);
266 pinmux_tristate_disable(PMUX_PINGRP_KBCF);
267
268 bad_config = 0;
269 break;
270 }
271 break;
272 case PERIPH_ID_DISP1:
273 if (config == FUNCMUX_DEFAULT) {
274 int i;
275
276 for (i = PMUX_PINGRP_LD0; i <= PMUX_PINGRP_LD17; i++) {
277 pinmux_set_func(i, PMUX_FUNC_DISPA);
278 pinmux_tristate_disable(i);
279 pinmux_set_pullupdown(i, PMUX_PULL_NORMAL);
280 }
281 pinmux_config_pingrp_table(disp1_default,
282 ARRAY_SIZE(disp1_default));
283 }
284 break;
285
286 default:
287 debug("%s: invalid periph_id %d", __func__, id);
288 return -1;
289 }
290
291 if (bad_config) {
292 debug("%s: invalid config %d for periph_id %d", __func__,
293 config, id);
294 return -1;
295 }
296
297 return 0;
298 }
299