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Linux/drivers/pinctrl/spear/pinctrl-spear310.c

  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 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                 .owner = THIS_MODULE,
412                 .of_match_table = spear310_pinctrl_of_match,
413         },
414         .probe = spear310_pinctrl_probe,
415         .remove = spear310_pinctrl_remove,
416 };
417 
418 static int __init spear310_pinctrl_init(void)
419 {
420         return platform_driver_register(&spear310_pinctrl_driver);
421 }
422 arch_initcall(spear310_pinctrl_init);
423 
424 static void __exit spear310_pinctrl_exit(void)
425 {
426         platform_driver_unregister(&spear310_pinctrl_driver);
427 }
428 module_exit(spear310_pinctrl_exit);
429 
430 MODULE_AUTHOR("Viresh Kumar <viresh.linux@gmail.com>");
431 MODULE_DESCRIPTION("ST Microelectronics SPEAr310 pinctrl driver");
432 MODULE_LICENSE("GPL v2");
433 MODULE_DEVICE_TABLE(of, spear310_pinctrl_of_match);
434 

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