1 /*
2  * Driver for the ST Microelectronics SPEAr310 pinmux
3  *
4  * Copyright (C) 2012 ST Microelectronics
5  * Viresh Kumar <vireshk@kernel.org>
6  *
7  * This file is licensed under the terms of the GNU General Public
8  * License version 2. This program is licensed "as is" without any
9  * warranty of any kind, whether express or implied.
10  */
11 
12 #include <linux/err.h>
13 #include <linux/init.h>
14 #include <linux/mod_devicetable.h>
15 #include <linux/platform_device.h>
16 #include "pinctrl-spear3xx.h"
17 
18 #define DRIVER_NAME "spear310-pinmux"
19 
20 /* addresses */
21 #define PMX_CONFIG_REG			0x08
22 
23 /* emi_cs_0_to_5_pins */
24 static const unsigned emi_cs_0_to_5_pins[] = { 45, 46, 47, 48, 49, 50 };
25 static struct spear_muxreg emi_cs_0_to_5_muxreg[] = {
26 	{
27 		.reg = PMX_CONFIG_REG,
28 		.mask = PMX_TIMER_0_1_MASK | PMX_TIMER_2_3_MASK,
29 		.val = 0,
30 	},
31 };
32 
33 static struct spear_modemux emi_cs_0_to_5_modemux[] = {
34 	{
35 		.muxregs = emi_cs_0_to_5_muxreg,
36 		.nmuxregs = ARRAY_SIZE(emi_cs_0_to_5_muxreg),
37 	},
38 };
39 
40 static struct spear_pingroup emi_cs_0_to_5_pingroup = {
41 	.name = "emi_cs_0_to_5_grp",
42 	.pins = emi_cs_0_to_5_pins,
43 	.npins = ARRAY_SIZE(emi_cs_0_to_5_pins),
44 	.modemuxs = emi_cs_0_to_5_modemux,
45 	.nmodemuxs = ARRAY_SIZE(emi_cs_0_to_5_modemux),
46 };
47 
48 static const char *const emi_cs_0_to_5_grps[] = { "emi_cs_0_to_5_grp" };
49 static struct spear_function emi_cs_0_to_5_function = {
50 	.name = "emi",
51 	.groups = emi_cs_0_to_5_grps,
52 	.ngroups = ARRAY_SIZE(emi_cs_0_to_5_grps),
53 };
54 
55 /* uart1_pins */
56 static const unsigned uart1_pins[] = { 0, 1 };
57 static struct spear_muxreg uart1_muxreg[] = {
58 	{
59 		.reg = PMX_CONFIG_REG,
60 		.mask = PMX_FIRDA_MASK,
61 		.val = 0,
62 	},
63 };
64 
65 static struct spear_modemux uart1_modemux[] = {
66 	{
67 		.muxregs = uart1_muxreg,
68 		.nmuxregs = ARRAY_SIZE(uart1_muxreg),
69 	},
70 };
71 
72 static struct spear_pingroup uart1_pingroup = {
73 	.name = "uart1_grp",
74 	.pins = uart1_pins,
75 	.npins = ARRAY_SIZE(uart1_pins),
76 	.modemuxs = uart1_modemux,
77 	.nmodemuxs = ARRAY_SIZE(uart1_modemux),
78 };
79 
80 static const char *const uart1_grps[] = { "uart1_grp" };
81 static struct spear_function uart1_function = {
82 	.name = "uart1",
83 	.groups = uart1_grps,
84 	.ngroups = ARRAY_SIZE(uart1_grps),
85 };
86 
87 /* uart2_pins */
88 static const unsigned uart2_pins[] = { 43, 44 };
89 static struct spear_muxreg uart2_muxreg[] = {
90 	{
91 		.reg = PMX_CONFIG_REG,
92 		.mask = PMX_TIMER_0_1_MASK,
93 		.val = 0,
94 	},
95 };
96 
97 static struct spear_modemux uart2_modemux[] = {
98 	{
99 		.muxregs = uart2_muxreg,
100 		.nmuxregs = ARRAY_SIZE(uart2_muxreg),
101 	},
102 };
103 
104 static struct spear_pingroup uart2_pingroup = {
105 	.name = "uart2_grp",
106 	.pins = uart2_pins,
107 	.npins = ARRAY_SIZE(uart2_pins),
108 	.modemuxs = uart2_modemux,
109 	.nmodemuxs = ARRAY_SIZE(uart2_modemux),
110 };
111 
112 static const char *const uart2_grps[] = { "uart2_grp" };
113 static struct spear_function uart2_function = {
114 	.name = "uart2",
115 	.groups = uart2_grps,
116 	.ngroups = ARRAY_SIZE(uart2_grps),
117 };
118 
119 /* uart3_pins */
120 static const unsigned uart3_pins[] = { 37, 38 };
121 static struct spear_muxreg uart3_muxreg[] = {
122 	{
123 		.reg = PMX_CONFIG_REG,
124 		.mask = PMX_UART0_MODEM_MASK,
125 		.val = 0,
126 	},
127 };
128 
129 static struct spear_modemux uart3_modemux[] = {
130 	{
131 		.muxregs = uart3_muxreg,
132 		.nmuxregs = ARRAY_SIZE(uart3_muxreg),
133 	},
134 };
135 
136 static struct spear_pingroup uart3_pingroup = {
137 	.name = "uart3_grp",
138 	.pins = uart3_pins,
139 	.npins = ARRAY_SIZE(uart3_pins),
140 	.modemuxs = uart3_modemux,
141 	.nmodemuxs = ARRAY_SIZE(uart3_modemux),
142 };
143 
144 static const char *const uart3_grps[] = { "uart3_grp" };
145 static struct spear_function uart3_function = {
146 	.name = "uart3",
147 	.groups = uart3_grps,
148 	.ngroups = ARRAY_SIZE(uart3_grps),
149 };
150 
151 /* uart4_pins */
152 static const unsigned uart4_pins[] = { 39, 40 };
153 static struct spear_muxreg uart4_muxreg[] = {
154 	{
155 		.reg = PMX_CONFIG_REG,
156 		.mask = PMX_UART0_MODEM_MASK,
157 		.val = 0,
158 	},
159 };
160 
161 static struct spear_modemux uart4_modemux[] = {
162 	{
163 		.muxregs = uart4_muxreg,
164 		.nmuxregs = ARRAY_SIZE(uart4_muxreg),
165 	},
166 };
167 
168 static struct spear_pingroup uart4_pingroup = {
169 	.name = "uart4_grp",
170 	.pins = uart4_pins,
171 	.npins = ARRAY_SIZE(uart4_pins),
172 	.modemuxs = uart4_modemux,
173 	.nmodemuxs = ARRAY_SIZE(uart4_modemux),
174 };
175 
176 static const char *const uart4_grps[] = { "uart4_grp" };
177 static struct spear_function uart4_function = {
178 	.name = "uart4",
179 	.groups = uart4_grps,
180 	.ngroups = ARRAY_SIZE(uart4_grps),
181 };
182 
183 /* uart5_pins */
184 static const unsigned uart5_pins[] = { 41, 42 };
185 static struct spear_muxreg uart5_muxreg[] = {
186 	{
187 		.reg = PMX_CONFIG_REG,
188 		.mask = PMX_UART0_MODEM_MASK,
189 		.val = 0,
190 	},
191 };
192 
193 static struct spear_modemux uart5_modemux[] = {
194 	{
195 		.muxregs = uart5_muxreg,
196 		.nmuxregs = ARRAY_SIZE(uart5_muxreg),
197 	},
198 };
199 
200 static struct spear_pingroup uart5_pingroup = {
201 	.name = "uart5_grp",
202 	.pins = uart5_pins,
203 	.npins = ARRAY_SIZE(uart5_pins),
204 	.modemuxs = uart5_modemux,
205 	.nmodemuxs = ARRAY_SIZE(uart5_modemux),
206 };
207 
208 static const char *const uart5_grps[] = { "uart5_grp" };
209 static struct spear_function uart5_function = {
210 	.name = "uart5",
211 	.groups = uart5_grps,
212 	.ngroups = ARRAY_SIZE(uart5_grps),
213 };
214 
215 /* fsmc_pins */
216 static const unsigned fsmc_pins[] = { 34, 35, 36 };
217 static struct spear_muxreg fsmc_muxreg[] = {
218 	{
219 		.reg = PMX_CONFIG_REG,
220 		.mask = PMX_SSP_CS_MASK,
221 		.val = 0,
222 	},
223 };
224 
225 static struct spear_modemux fsmc_modemux[] = {
226 	{
227 		.muxregs = fsmc_muxreg,
228 		.nmuxregs = ARRAY_SIZE(fsmc_muxreg),
229 	},
230 };
231 
232 static struct spear_pingroup fsmc_pingroup = {
233 	.name = "fsmc_grp",
234 	.pins = fsmc_pins,
235 	.npins = ARRAY_SIZE(fsmc_pins),
236 	.modemuxs = fsmc_modemux,
237 	.nmodemuxs = ARRAY_SIZE(fsmc_modemux),
238 };
239 
240 static const char *const fsmc_grps[] = { "fsmc_grp" };
241 static struct spear_function fsmc_function = {
242 	.name = "fsmc",
243 	.groups = fsmc_grps,
244 	.ngroups = ARRAY_SIZE(fsmc_grps),
245 };
246 
247 /* rs485_0_pins */
248 static const unsigned rs485_0_pins[] = { 19, 20, 21, 22, 23 };
249 static struct spear_muxreg rs485_0_muxreg[] = {
250 	{
251 		.reg = PMX_CONFIG_REG,
252 		.mask = PMX_MII_MASK,
253 		.val = 0,
254 	},
255 };
256 
257 static struct spear_modemux rs485_0_modemux[] = {
258 	{
259 		.muxregs = rs485_0_muxreg,
260 		.nmuxregs = ARRAY_SIZE(rs485_0_muxreg),
261 	},
262 };
263 
264 static struct spear_pingroup rs485_0_pingroup = {
265 	.name = "rs485_0_grp",
266 	.pins = rs485_0_pins,
267 	.npins = ARRAY_SIZE(rs485_0_pins),
268 	.modemuxs = rs485_0_modemux,
269 	.nmodemuxs = ARRAY_SIZE(rs485_0_modemux),
270 };
271 
272 static const char *const rs485_0_grps[] = { "rs485_0" };
273 static struct spear_function rs485_0_function = {
274 	.name = "rs485_0",
275 	.groups = rs485_0_grps,
276 	.ngroups = ARRAY_SIZE(rs485_0_grps),
277 };
278 
279 /* rs485_1_pins */
280 static const unsigned rs485_1_pins[] = { 14, 15, 16, 17, 18 };
281 static struct spear_muxreg rs485_1_muxreg[] = {
282 	{
283 		.reg = PMX_CONFIG_REG,
284 		.mask = PMX_MII_MASK,
285 		.val = 0,
286 	},
287 };
288 
289 static struct spear_modemux rs485_1_modemux[] = {
290 	{
291 		.muxregs = rs485_1_muxreg,
292 		.nmuxregs = ARRAY_SIZE(rs485_1_muxreg),
293 	},
294 };
295 
296 static struct spear_pingroup rs485_1_pingroup = {
297 	.name = "rs485_1_grp",
298 	.pins = rs485_1_pins,
299 	.npins = ARRAY_SIZE(rs485_1_pins),
300 	.modemuxs = rs485_1_modemux,
301 	.nmodemuxs = ARRAY_SIZE(rs485_1_modemux),
302 };
303 
304 static const char *const rs485_1_grps[] = { "rs485_1" };
305 static struct spear_function rs485_1_function = {
306 	.name = "rs485_1",
307 	.groups = rs485_1_grps,
308 	.ngroups = ARRAY_SIZE(rs485_1_grps),
309 };
310 
311 /* tdm_pins */
312 static const unsigned tdm_pins[] = { 10, 11, 12, 13 };
313 static struct spear_muxreg tdm_muxreg[] = {
314 	{
315 		.reg = PMX_CONFIG_REG,
316 		.mask = PMX_MII_MASK,
317 		.val = 0,
318 	},
319 };
320 
321 static struct spear_modemux tdm_modemux[] = {
322 	{
323 		.muxregs = tdm_muxreg,
324 		.nmuxregs = ARRAY_SIZE(tdm_muxreg),
325 	},
326 };
327 
328 static struct spear_pingroup tdm_pingroup = {
329 	.name = "tdm_grp",
330 	.pins = tdm_pins,
331 	.npins = ARRAY_SIZE(tdm_pins),
332 	.modemuxs = tdm_modemux,
333 	.nmodemuxs = ARRAY_SIZE(tdm_modemux),
334 };
335 
336 static const char *const tdm_grps[] = { "tdm_grp" };
337 static struct spear_function tdm_function = {
338 	.name = "tdm",
339 	.groups = tdm_grps,
340 	.ngroups = ARRAY_SIZE(tdm_grps),
341 };
342 
343 /* pingroups */
344 static struct spear_pingroup *spear310_pingroups[] = {
345 	SPEAR3XX_COMMON_PINGROUPS,
346 	&emi_cs_0_to_5_pingroup,
347 	&uart1_pingroup,
348 	&uart2_pingroup,
349 	&uart3_pingroup,
350 	&uart4_pingroup,
351 	&uart5_pingroup,
352 	&fsmc_pingroup,
353 	&rs485_0_pingroup,
354 	&rs485_1_pingroup,
355 	&tdm_pingroup,
356 };
357 
358 /* functions */
359 static struct spear_function *spear310_functions[] = {
360 	SPEAR3XX_COMMON_FUNCTIONS,
361 	&emi_cs_0_to_5_function,
362 	&uart1_function,
363 	&uart2_function,
364 	&uart3_function,
365 	&uart4_function,
366 	&uart5_function,
367 	&fsmc_function,
368 	&rs485_0_function,
369 	&rs485_1_function,
370 	&tdm_function,
371 };
372 
373 static const struct of_device_id spear310_pinctrl_of_match[] = {
374 	{
375 		.compatible = "st,spear310-pinmux",
376 	},
377 	{},
378 };
379 
spear310_pinctrl_probe(struct platform_device * pdev)380 static int spear310_pinctrl_probe(struct platform_device *pdev)
381 {
382 	spear3xx_machdata.groups = spear310_pingroups;
383 	spear3xx_machdata.ngroups = ARRAY_SIZE(spear310_pingroups);
384 	spear3xx_machdata.functions = spear310_functions;
385 	spear3xx_machdata.nfunctions = ARRAY_SIZE(spear310_functions);
386 
387 	pmx_init_addr(&spear3xx_machdata, PMX_CONFIG_REG);
388 	pmx_init_gpio_pingroup_addr(spear3xx_machdata.gpio_pingroups,
389 			spear3xx_machdata.ngpio_pingroups, PMX_CONFIG_REG);
390 
391 	spear3xx_machdata.modes_supported = false;
392 
393 	return spear_pinctrl_probe(pdev, &spear3xx_machdata);
394 }
395 
396 static struct platform_driver spear310_pinctrl_driver = {
397 	.driver = {
398 		.name = DRIVER_NAME,
399 		.of_match_table = spear310_pinctrl_of_match,
400 	},
401 	.probe = spear310_pinctrl_probe,
402 };
403 
spear310_pinctrl_init(void)404 static int __init spear310_pinctrl_init(void)
405 {
406 	return platform_driver_register(&spear310_pinctrl_driver);
407 }
408 arch_initcall(spear310_pinctrl_init);
409