1 /*
2  * Driver for the ST Microelectronics SPEAr310 pinmux
3  *
4  * Copyright (C) 2012 ST Microelectronics
5  * Viresh Kumar <viresh.linux@gmail.com>
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/module.h>
15 #include <linux/of_device.h>
16 #include <linux/platform_device.h>
17 #include "pinctrl-spear3xx.h"
18 
19 #define DRIVER_NAME "spear310-pinmux"
20 
21 /* addresses */
22 #define PMX_CONFIG_REG			0x08
23 
24 /* emi_cs_0_to_5_pins */
25 static const unsigned emi_cs_0_to_5_pins[] = { 45, 46, 47, 48, 49, 50 };
26 static struct spear_muxreg emi_cs_0_to_5_muxreg[] = {
27 	{
28 		.reg = PMX_CONFIG_REG,
29 		.mask = PMX_TIMER_0_1_MASK | PMX_TIMER_2_3_MASK,
30 		.val = 0,
31 	},
32 };
33 
34 static struct spear_modemux emi_cs_0_to_5_modemux[] = {
35 	{
36 		.muxregs = emi_cs_0_to_5_muxreg,
37 		.nmuxregs = ARRAY_SIZE(emi_cs_0_to_5_muxreg),
38 	},
39 };
40 
41 static struct spear_pingroup emi_cs_0_to_5_pingroup = {
42 	.name = "emi_cs_0_to_5_grp",
43 	.pins = emi_cs_0_to_5_pins,
44 	.npins = ARRAY_SIZE(emi_cs_0_to_5_pins),
45 	.modemuxs = emi_cs_0_to_5_modemux,
46 	.nmodemuxs = ARRAY_SIZE(emi_cs_0_to_5_modemux),
47 };
48 
49 static const char *const emi_cs_0_to_5_grps[] = { "emi_cs_0_to_5_grp" };
50 static struct spear_function emi_cs_0_to_5_function = {
51 	.name = "emi",
52 	.groups = emi_cs_0_to_5_grps,
53 	.ngroups = ARRAY_SIZE(emi_cs_0_to_5_grps),
54 };
55 
56 /* uart1_pins */
57 static const unsigned uart1_pins[] = { 0, 1 };
58 static struct spear_muxreg uart1_muxreg[] = {
59 	{
60 		.reg = PMX_CONFIG_REG,
61 		.mask = PMX_FIRDA_MASK,
62 		.val = 0,
63 	},
64 };
65 
66 static struct spear_modemux uart1_modemux[] = {
67 	{
68 		.muxregs = uart1_muxreg,
69 		.nmuxregs = ARRAY_SIZE(uart1_muxreg),
70 	},
71 };
72 
73 static struct spear_pingroup uart1_pingroup = {
74 	.name = "uart1_grp",
75 	.pins = uart1_pins,
76 	.npins = ARRAY_SIZE(uart1_pins),
77 	.modemuxs = uart1_modemux,
78 	.nmodemuxs = ARRAY_SIZE(uart1_modemux),
79 };
80 
81 static const char *const uart1_grps[] = { "uart1_grp" };
82 static struct spear_function uart1_function = {
83 	.name = "uart1",
84 	.groups = uart1_grps,
85 	.ngroups = ARRAY_SIZE(uart1_grps),
86 };
87 
88 /* uart2_pins */
89 static const unsigned uart2_pins[] = { 43, 44 };
90 static struct spear_muxreg uart2_muxreg[] = {
91 	{
92 		.reg = PMX_CONFIG_REG,
93 		.mask = PMX_TIMER_0_1_MASK,
94 		.val = 0,
95 	},
96 };
97 
98 static struct spear_modemux uart2_modemux[] = {
99 	{
100 		.muxregs = uart2_muxreg,
101 		.nmuxregs = ARRAY_SIZE(uart2_muxreg),
102 	},
103 };
104 
105 static struct spear_pingroup uart2_pingroup = {
106 	.name = "uart2_grp",
107 	.pins = uart2_pins,
108 	.npins = ARRAY_SIZE(uart2_pins),
109 	.modemuxs = uart2_modemux,
110 	.nmodemuxs = ARRAY_SIZE(uart2_modemux),
111 };
112 
113 static const char *const uart2_grps[] = { "uart2_grp" };
114 static struct spear_function uart2_function = {
115 	.name = "uart2",
116 	.groups = uart2_grps,
117 	.ngroups = ARRAY_SIZE(uart2_grps),
118 };
119 
120 /* uart3_pins */
121 static const unsigned uart3_pins[] = { 37, 38 };
122 static struct spear_muxreg uart3_muxreg[] = {
123 	{
124 		.reg = PMX_CONFIG_REG,
125 		.mask = PMX_UART0_MODEM_MASK,
126 		.val = 0,
127 	},
128 };
129 
130 static struct spear_modemux uart3_modemux[] = {
131 	{
132 		.muxregs = uart3_muxreg,
133 		.nmuxregs = ARRAY_SIZE(uart3_muxreg),
134 	},
135 };
136 
137 static struct spear_pingroup uart3_pingroup = {
138 	.name = "uart3_grp",
139 	.pins = uart3_pins,
140 	.npins = ARRAY_SIZE(uart3_pins),
141 	.modemuxs = uart3_modemux,
142 	.nmodemuxs = ARRAY_SIZE(uart3_modemux),
143 };
144 
145 static const char *const uart3_grps[] = { "uart3_grp" };
146 static struct spear_function uart3_function = {
147 	.name = "uart3",
148 	.groups = uart3_grps,
149 	.ngroups = ARRAY_SIZE(uart3_grps),
150 };
151 
152 /* uart4_pins */
153 static const unsigned uart4_pins[] = { 39, 40 };
154 static struct spear_muxreg uart4_muxreg[] = {
155 	{
156 		.reg = PMX_CONFIG_REG,
157 		.mask = PMX_UART0_MODEM_MASK,
158 		.val = 0,
159 	},
160 };
161 
162 static struct spear_modemux uart4_modemux[] = {
163 	{
164 		.muxregs = uart4_muxreg,
165 		.nmuxregs = ARRAY_SIZE(uart4_muxreg),
166 	},
167 };
168 
169 static struct spear_pingroup uart4_pingroup = {
170 	.name = "uart4_grp",
171 	.pins = uart4_pins,
172 	.npins = ARRAY_SIZE(uart4_pins),
173 	.modemuxs = uart4_modemux,
174 	.nmodemuxs = ARRAY_SIZE(uart4_modemux),
175 };
176 
177 static const char *const uart4_grps[] = { "uart4_grp" };
178 static struct spear_function uart4_function = {
179 	.name = "uart4",
180 	.groups = uart4_grps,
181 	.ngroups = ARRAY_SIZE(uart4_grps),
182 };
183 
184 /* uart5_pins */
185 static const unsigned uart5_pins[] = { 41, 42 };
186 static struct spear_muxreg uart5_muxreg[] = {
187 	{
188 		.reg = PMX_CONFIG_REG,
189 		.mask = PMX_UART0_MODEM_MASK,
190 		.val = 0,
191 	},
192 };
193 
194 static struct spear_modemux uart5_modemux[] = {
195 	{
196 		.muxregs = uart5_muxreg,
197 		.nmuxregs = ARRAY_SIZE(uart5_muxreg),
198 	},
199 };
200 
201 static struct spear_pingroup uart5_pingroup = {
202 	.name = "uart5_grp",
203 	.pins = uart5_pins,
204 	.npins = ARRAY_SIZE(uart5_pins),
205 	.modemuxs = uart5_modemux,
206 	.nmodemuxs = ARRAY_SIZE(uart5_modemux),
207 };
208 
209 static const char *const uart5_grps[] = { "uart5_grp" };
210 static struct spear_function uart5_function = {
211 	.name = "uart5",
212 	.groups = uart5_grps,
213 	.ngroups = ARRAY_SIZE(uart5_grps),
214 };
215 
216 /* fsmc_pins */
217 static const unsigned fsmc_pins[] = { 34, 35, 36 };
218 static struct spear_muxreg fsmc_muxreg[] = {
219 	{
220 		.reg = PMX_CONFIG_REG,
221 		.mask = PMX_SSP_CS_MASK,
222 		.val = 0,
223 	},
224 };
225 
226 static struct spear_modemux fsmc_modemux[] = {
227 	{
228 		.muxregs = fsmc_muxreg,
229 		.nmuxregs = ARRAY_SIZE(fsmc_muxreg),
230 	},
231 };
232 
233 static struct spear_pingroup fsmc_pingroup = {
234 	.name = "fsmc_grp",
235 	.pins = fsmc_pins,
236 	.npins = ARRAY_SIZE(fsmc_pins),
237 	.modemuxs = fsmc_modemux,
238 	.nmodemuxs = ARRAY_SIZE(fsmc_modemux),
239 };
240 
241 static const char *const fsmc_grps[] = { "fsmc_grp" };
242 static struct spear_function fsmc_function = {
243 	.name = "fsmc",
244 	.groups = fsmc_grps,
245 	.ngroups = ARRAY_SIZE(fsmc_grps),
246 };
247 
248 /* rs485_0_pins */
249 static const unsigned rs485_0_pins[] = { 19, 20, 21, 22, 23 };
250 static struct spear_muxreg rs485_0_muxreg[] = {
251 	{
252 		.reg = PMX_CONFIG_REG,
253 		.mask = PMX_MII_MASK,
254 		.val = 0,
255 	},
256 };
257 
258 static struct spear_modemux rs485_0_modemux[] = {
259 	{
260 		.muxregs = rs485_0_muxreg,
261 		.nmuxregs = ARRAY_SIZE(rs485_0_muxreg),
262 	},
263 };
264 
265 static struct spear_pingroup rs485_0_pingroup = {
266 	.name = "rs485_0_grp",
267 	.pins = rs485_0_pins,
268 	.npins = ARRAY_SIZE(rs485_0_pins),
269 	.modemuxs = rs485_0_modemux,
270 	.nmodemuxs = ARRAY_SIZE(rs485_0_modemux),
271 };
272 
273 static const char *const rs485_0_grps[] = { "rs485_0" };
274 static struct spear_function rs485_0_function = {
275 	.name = "rs485_0",
276 	.groups = rs485_0_grps,
277 	.ngroups = ARRAY_SIZE(rs485_0_grps),
278 };
279 
280 /* rs485_1_pins */
281 static const unsigned rs485_1_pins[] = { 14, 15, 16, 17, 18 };
282 static struct spear_muxreg rs485_1_muxreg[] = {
283 	{
284 		.reg = PMX_CONFIG_REG,
285 		.mask = PMX_MII_MASK,
286 		.val = 0,
287 	},
288 };
289 
290 static struct spear_modemux rs485_1_modemux[] = {
291 	{
292 		.muxregs = rs485_1_muxreg,
293 		.nmuxregs = ARRAY_SIZE(rs485_1_muxreg),
294 	},
295 };
296 
297 static struct spear_pingroup rs485_1_pingroup = {
298 	.name = "rs485_1_grp",
299 	.pins = rs485_1_pins,
300 	.npins = ARRAY_SIZE(rs485_1_pins),
301 	.modemuxs = rs485_1_modemux,
302 	.nmodemuxs = ARRAY_SIZE(rs485_1_modemux),
303 };
304 
305 static const char *const rs485_1_grps[] = { "rs485_1" };
306 static struct spear_function rs485_1_function = {
307 	.name = "rs485_1",
308 	.groups = rs485_1_grps,
309 	.ngroups = ARRAY_SIZE(rs485_1_grps),
310 };
311 
312 /* tdm_pins */
313 static const unsigned tdm_pins[] = { 10, 11, 12, 13 };
314 static struct spear_muxreg tdm_muxreg[] = {
315 	{
316 		.reg = PMX_CONFIG_REG,
317 		.mask = PMX_MII_MASK,
318 		.val = 0,
319 	},
320 };
321 
322 static struct spear_modemux tdm_modemux[] = {
323 	{
324 		.muxregs = tdm_muxreg,
325 		.nmuxregs = ARRAY_SIZE(tdm_muxreg),
326 	},
327 };
328 
329 static struct spear_pingroup tdm_pingroup = {
330 	.name = "tdm_grp",
331 	.pins = tdm_pins,
332 	.npins = ARRAY_SIZE(tdm_pins),
333 	.modemuxs = tdm_modemux,
334 	.nmodemuxs = ARRAY_SIZE(tdm_modemux),
335 };
336 
337 static const char *const tdm_grps[] = { "tdm_grp" };
338 static struct spear_function tdm_function = {
339 	.name = "tdm",
340 	.groups = tdm_grps,
341 	.ngroups = ARRAY_SIZE(tdm_grps),
342 };
343 
344 /* pingroups */
345 static struct spear_pingroup *spear310_pingroups[] = {
346 	SPEAR3XX_COMMON_PINGROUPS,
347 	&emi_cs_0_to_5_pingroup,
348 	&uart1_pingroup,
349 	&uart2_pingroup,
350 	&uart3_pingroup,
351 	&uart4_pingroup,
352 	&uart5_pingroup,
353 	&fsmc_pingroup,
354 	&rs485_0_pingroup,
355 	&rs485_1_pingroup,
356 	&tdm_pingroup,
357 };
358 
359 /* functions */
360 static struct spear_function *spear310_functions[] = {
361 	SPEAR3XX_COMMON_FUNCTIONS,
362 	&emi_cs_0_to_5_function,
363 	&uart1_function,
364 	&uart2_function,
365 	&uart3_function,
366 	&uart4_function,
367 	&uart5_function,
368 	&fsmc_function,
369 	&rs485_0_function,
370 	&rs485_1_function,
371 	&tdm_function,
372 };
373 
374 static const struct of_device_id spear310_pinctrl_of_match[] = {
375 	{
376 		.compatible = "st,spear310-pinmux",
377 	},
378 	{},
379 };
380 
381 static int spear310_pinctrl_probe(struct platform_device *pdev)
382 {
383 	int ret;
384 
385 	spear3xx_machdata.groups = spear310_pingroups;
386 	spear3xx_machdata.ngroups = ARRAY_SIZE(spear310_pingroups);
387 	spear3xx_machdata.functions = spear310_functions;
388 	spear3xx_machdata.nfunctions = ARRAY_SIZE(spear310_functions);
389 
390 	pmx_init_addr(&spear3xx_machdata, PMX_CONFIG_REG);
391 	pmx_init_gpio_pingroup_addr(spear3xx_machdata.gpio_pingroups,
392 			spear3xx_machdata.ngpio_pingroups, PMX_CONFIG_REG);
393 
394 	spear3xx_machdata.modes_supported = false;
395 
396 	ret = spear_pinctrl_probe(pdev, &spear3xx_machdata);
397 	if (ret)
398 		return ret;
399 
400 	return 0;
401 }
402 
403 static int spear310_pinctrl_remove(struct platform_device *pdev)
404 {
405 	return spear_pinctrl_remove(pdev);
406 }
407 
408 static struct platform_driver spear310_pinctrl_driver = {
409 	.driver = {
410 		.name = DRIVER_NAME,
411 		.of_match_table = spear310_pinctrl_of_match,
412 	},
413 	.probe = spear310_pinctrl_probe,
414 	.remove = spear310_pinctrl_remove,
415 };
416 
417 static int __init spear310_pinctrl_init(void)
418 {
419 	return platform_driver_register(&spear310_pinctrl_driver);
420 }
421 arch_initcall(spear310_pinctrl_init);
422 
423 static void __exit spear310_pinctrl_exit(void)
424 {
425 	platform_driver_unregister(&spear310_pinctrl_driver);
426 }
427 module_exit(spear310_pinctrl_exit);
428 
429 MODULE_AUTHOR("Viresh Kumar <viresh.linux@gmail.com>");
430 MODULE_DESCRIPTION("ST Microelectronics SPEAr310 pinctrl driver");
431 MODULE_LICENSE("GPL v2");
432 MODULE_DEVICE_TABLE(of, spear310_pinctrl_of_match);
433