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SUNRPC: Prevent kernel stack corruption on long values of flush
[deliverable/linux.git] / drivers / pinctrl / pinctrl-xway.c
1 /*
2 * linux/drivers/pinctrl/pinmux-xway.c
3 * based on linux/drivers/pinctrl/pinmux-pxa910.c
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * publishhed by the Free Software Foundation.
8 *
9 * Copyright (C) 2012 John Crispin <blogic@openwrt.org>
10 */
11
12 #include <linux/slab.h>
13 #include <linux/module.h>
14 #include <linux/of_platform.h>
15 #include <linux/of_address.h>
16 #include <linux/of_gpio.h>
17 #include <linux/ioport.h>
18 #include <linux/io.h>
19 #include <linux/device.h>
20 #include <linux/module.h>
21 #include <linux/io.h>
22 #include <linux/platform_device.h>
23
24 #include "pinctrl-lantiq.h"
25
26 #include <lantiq_soc.h>
27
28 /* we have 3 1/2 banks of 16 bit each */
29 #define PINS 16
30 #define PORT3 3
31 #define PORT(x) (x / PINS)
32 #define PORT_PIN(x) (x % PINS)
33
34 /* we have 2 mux bits that can be set for each pin */
35 #define MUX_ALT0 0x1
36 #define MUX_ALT1 0x2
37
38 /*
39 * each bank has this offset apart from the 1/2 bank that is mixed into the
40 * other 3 ranges
41 */
42 #define REG_OFF 0x30
43
44 /* these are the offsets to our registers */
45 #define GPIO_BASE(p) (REG_OFF * PORT(p))
46 #define GPIO_OUT(p) GPIO_BASE(p)
47 #define GPIO_IN(p) (GPIO_BASE(p) + 0x04)
48 #define GPIO_DIR(p) (GPIO_BASE(p) + 0x08)
49 #define GPIO_ALT0(p) (GPIO_BASE(p) + 0x0C)
50 #define GPIO_ALT1(p) (GPIO_BASE(p) + 0x10)
51 #define GPIO_OD(p) (GPIO_BASE(p) + 0x14)
52 #define GPIO_PUDSEL(p) (GPIO_BASE(p) + 0x1c)
53 #define GPIO_PUDEN(p) (GPIO_BASE(p) + 0x20)
54
55 /* the 1/2 port needs special offsets for some registers */
56 #define GPIO3_OD (GPIO_BASE(0) + 0x24)
57 #define GPIO3_PUDSEL (GPIO_BASE(0) + 0x28)
58 #define GPIO3_PUDEN (GPIO_BASE(0) + 0x2C)
59 #define GPIO3_ALT1 (GPIO_BASE(PINS) + 0x24)
60
61 /* macros to help us access the registers */
62 #define gpio_getbit(m, r, p) (!!(ltq_r32(m + r) & BIT(p)))
63 #define gpio_setbit(m, r, p) ltq_w32_mask(0, BIT(p), m + r)
64 #define gpio_clearbit(m, r, p) ltq_w32_mask(BIT(p), 0, m + r)
65
66 #define MFP_XWAY(a, f0, f1, f2, f3) \
67 { \
68 .name = #a, \
69 .pin = a, \
70 .func = { \
71 XWAY_MUX_##f0, \
72 XWAY_MUX_##f1, \
73 XWAY_MUX_##f2, \
74 XWAY_MUX_##f3, \
75 }, \
76 }
77
78 #define GRP_MUX(a, m, p) \
79 { .name = a, .mux = XWAY_MUX_##m, .pins = p, .npins = ARRAY_SIZE(p), }
80
81 #define FUNC_MUX(f, m) \
82 { .func = f, .mux = XWAY_MUX_##m, }
83
84 #define XWAY_MAX_PIN 32
85 #define XR9_MAX_PIN 56
86
87 enum xway_mux {
88 XWAY_MUX_GPIO = 0,
89 XWAY_MUX_SPI,
90 XWAY_MUX_ASC,
91 XWAY_MUX_PCI,
92 XWAY_MUX_CGU,
93 XWAY_MUX_EBU,
94 XWAY_MUX_JTAG,
95 XWAY_MUX_EXIN,
96 XWAY_MUX_TDM,
97 XWAY_MUX_STP,
98 XWAY_MUX_SIN,
99 XWAY_MUX_GPT,
100 XWAY_MUX_NMI,
101 XWAY_MUX_MDIO,
102 XWAY_MUX_MII,
103 XWAY_MUX_EPHY,
104 XWAY_MUX_DFE,
105 XWAY_MUX_SDIO,
106 XWAY_MUX_NONE = 0xffff,
107 };
108
109 static const struct ltq_mfp_pin xway_mfp[] = {
110 /* pin f0 f1 f2 f3 */
111 MFP_XWAY(GPIO0, GPIO, EXIN, NONE, TDM),
112 MFP_XWAY(GPIO1, GPIO, EXIN, NONE, NONE),
113 MFP_XWAY(GPIO2, GPIO, CGU, EXIN, NONE),
114 MFP_XWAY(GPIO3, GPIO, CGU, NONE, PCI),
115 MFP_XWAY(GPIO4, GPIO, STP, NONE, ASC),
116 MFP_XWAY(GPIO5, GPIO, STP, NONE, NONE),
117 MFP_XWAY(GPIO6, GPIO, STP, GPT, ASC),
118 MFP_XWAY(GPIO7, GPIO, CGU, PCI, NONE),
119 MFP_XWAY(GPIO8, GPIO, CGU, NMI, NONE),
120 MFP_XWAY(GPIO9, GPIO, ASC, SPI, EXIN),
121 MFP_XWAY(GPIO10, GPIO, ASC, SPI, NONE),
122 MFP_XWAY(GPIO11, GPIO, ASC, PCI, SPI),
123 MFP_XWAY(GPIO12, GPIO, ASC, NONE, NONE),
124 MFP_XWAY(GPIO13, GPIO, EBU, SPI, NONE),
125 MFP_XWAY(GPIO14, GPIO, CGU, PCI, NONE),
126 MFP_XWAY(GPIO15, GPIO, SPI, JTAG, NONE),
127 MFP_XWAY(GPIO16, GPIO, SPI, NONE, JTAG),
128 MFP_XWAY(GPIO17, GPIO, SPI, NONE, JTAG),
129 MFP_XWAY(GPIO18, GPIO, SPI, NONE, JTAG),
130 MFP_XWAY(GPIO19, GPIO, PCI, NONE, NONE),
131 MFP_XWAY(GPIO20, GPIO, JTAG, NONE, NONE),
132 MFP_XWAY(GPIO21, GPIO, PCI, EBU, GPT),
133 MFP_XWAY(GPIO22, GPIO, SPI, NONE, NONE),
134 MFP_XWAY(GPIO23, GPIO, EBU, PCI, STP),
135 MFP_XWAY(GPIO24, GPIO, EBU, TDM, PCI),
136 MFP_XWAY(GPIO25, GPIO, TDM, NONE, ASC),
137 MFP_XWAY(GPIO26, GPIO, EBU, NONE, TDM),
138 MFP_XWAY(GPIO27, GPIO, TDM, NONE, ASC),
139 MFP_XWAY(GPIO28, GPIO, GPT, NONE, NONE),
140 MFP_XWAY(GPIO29, GPIO, PCI, NONE, NONE),
141 MFP_XWAY(GPIO30, GPIO, PCI, NONE, NONE),
142 MFP_XWAY(GPIO31, GPIO, EBU, PCI, NONE),
143 MFP_XWAY(GPIO32, GPIO, NONE, NONE, EBU),
144 MFP_XWAY(GPIO33, GPIO, NONE, NONE, EBU),
145 MFP_XWAY(GPIO34, GPIO, NONE, NONE, EBU),
146 MFP_XWAY(GPIO35, GPIO, NONE, NONE, EBU),
147 MFP_XWAY(GPIO36, GPIO, SIN, NONE, EBU),
148 MFP_XWAY(GPIO37, GPIO, PCI, NONE, NONE),
149 MFP_XWAY(GPIO38, GPIO, PCI, NONE, NONE),
150 MFP_XWAY(GPIO39, GPIO, EXIN, NONE, NONE),
151 MFP_XWAY(GPIO40, GPIO, NONE, NONE, NONE),
152 MFP_XWAY(GPIO41, GPIO, NONE, NONE, NONE),
153 MFP_XWAY(GPIO42, GPIO, MDIO, NONE, NONE),
154 MFP_XWAY(GPIO43, GPIO, MDIO, NONE, NONE),
155 MFP_XWAY(GPIO44, GPIO, NONE, NONE, SIN),
156 MFP_XWAY(GPIO45, GPIO, NONE, NONE, SIN),
157 MFP_XWAY(GPIO46, GPIO, NONE, NONE, EXIN),
158 MFP_XWAY(GPIO47, GPIO, NONE, NONE, SIN),
159 MFP_XWAY(GPIO48, GPIO, EBU, NONE, NONE),
160 MFP_XWAY(GPIO49, GPIO, EBU, NONE, NONE),
161 MFP_XWAY(GPIO50, GPIO, NONE, NONE, NONE),
162 MFP_XWAY(GPIO51, GPIO, NONE, NONE, NONE),
163 MFP_XWAY(GPIO52, GPIO, NONE, NONE, NONE),
164 MFP_XWAY(GPIO53, GPIO, NONE, NONE, NONE),
165 MFP_XWAY(GPIO54, GPIO, NONE, NONE, NONE),
166 MFP_XWAY(GPIO55, GPIO, NONE, NONE, NONE),
167 };
168
169 static const struct ltq_mfp_pin ase_mfp[] = {
170 /* pin f0 f1 f2 f3 */
171 MFP_XWAY(GPIO0, GPIO, EXIN, MII, TDM),
172 MFP_XWAY(GPIO1, GPIO, STP, DFE, EBU),
173 MFP_XWAY(GPIO2, GPIO, STP, DFE, EPHY),
174 MFP_XWAY(GPIO3, GPIO, STP, EPHY, EBU),
175 MFP_XWAY(GPIO4, GPIO, GPT, EPHY, MII),
176 MFP_XWAY(GPIO5, GPIO, MII, ASC, GPT),
177 MFP_XWAY(GPIO6, GPIO, MII, ASC, EXIN),
178 MFP_XWAY(GPIO7, GPIO, SPI, MII, JTAG),
179 MFP_XWAY(GPIO8, GPIO, SPI, MII, JTAG),
180 MFP_XWAY(GPIO9, GPIO, SPI, MII, JTAG),
181 MFP_XWAY(GPIO10, GPIO, SPI, MII, JTAG),
182 MFP_XWAY(GPIO11, GPIO, EBU, CGU, JTAG),
183 MFP_XWAY(GPIO12, GPIO, EBU, MII, SDIO),
184 MFP_XWAY(GPIO13, GPIO, EBU, MII, CGU),
185 MFP_XWAY(GPIO14, GPIO, EBU, SPI, CGU),
186 MFP_XWAY(GPIO15, GPIO, EBU, SPI, SDIO),
187 MFP_XWAY(GPIO16, GPIO, NONE, NONE, NONE),
188 MFP_XWAY(GPIO17, GPIO, NONE, NONE, NONE),
189 MFP_XWAY(GPIO18, GPIO, NONE, NONE, NONE),
190 MFP_XWAY(GPIO19, GPIO, EBU, MII, SDIO),
191 MFP_XWAY(GPIO20, GPIO, EBU, MII, SDIO),
192 MFP_XWAY(GPIO21, GPIO, EBU, MII, SDIO),
193 MFP_XWAY(GPIO22, GPIO, EBU, MII, CGU),
194 MFP_XWAY(GPIO23, GPIO, EBU, MII, CGU),
195 MFP_XWAY(GPIO24, GPIO, EBU, NONE, MII),
196 MFP_XWAY(GPIO25, GPIO, EBU, MII, GPT),
197 MFP_XWAY(GPIO26, GPIO, EBU, MII, SDIO),
198 MFP_XWAY(GPIO27, GPIO, EBU, NONE, MII),
199 MFP_XWAY(GPIO28, GPIO, MII, EBU, SDIO),
200 MFP_XWAY(GPIO29, GPIO, EBU, MII, EXIN),
201 MFP_XWAY(GPIO30, GPIO, NONE, NONE, NONE),
202 MFP_XWAY(GPIO31, GPIO, NONE, NONE, NONE),
203 };
204
205 static const unsigned pins_jtag[] = {GPIO15, GPIO16, GPIO17, GPIO19, GPIO35};
206 static const unsigned pins_asc0[] = {GPIO11, GPIO12};
207 static const unsigned pins_asc0_cts_rts[] = {GPIO9, GPIO10};
208 static const unsigned pins_stp[] = {GPIO4, GPIO5, GPIO6};
209 static const unsigned pins_nmi[] = {GPIO8};
210 static const unsigned pins_mdio[] = {GPIO42, GPIO43};
211
212 static const unsigned pins_ebu_a24[] = {GPIO13};
213 static const unsigned pins_ebu_clk[] = {GPIO21};
214 static const unsigned pins_ebu_cs1[] = {GPIO23};
215 static const unsigned pins_ebu_a23[] = {GPIO24};
216 static const unsigned pins_ebu_wait[] = {GPIO26};
217 static const unsigned pins_ebu_a25[] = {GPIO31};
218 static const unsigned pins_ebu_rdy[] = {GPIO48};
219 static const unsigned pins_ebu_rd[] = {GPIO49};
220
221 static const unsigned pins_nand_ale[] = {GPIO13};
222 static const unsigned pins_nand_cs1[] = {GPIO23};
223 static const unsigned pins_nand_cle[] = {GPIO24};
224 static const unsigned pins_nand_rdy[] = {GPIO48};
225 static const unsigned pins_nand_rd[] = {GPIO49};
226
227 static const unsigned pins_exin0[] = {GPIO0};
228 static const unsigned pins_exin1[] = {GPIO1};
229 static const unsigned pins_exin2[] = {GPIO2};
230 static const unsigned pins_exin3[] = {GPIO39};
231 static const unsigned pins_exin4[] = {GPIO46};
232 static const unsigned pins_exin5[] = {GPIO9};
233
234 static const unsigned pins_spi[] = {GPIO16, GPIO17, GPIO18};
235 static const unsigned pins_spi_cs1[] = {GPIO15};
236 static const unsigned pins_spi_cs2[] = {GPIO21};
237 static const unsigned pins_spi_cs3[] = {GPIO13};
238 static const unsigned pins_spi_cs4[] = {GPIO10};
239 static const unsigned pins_spi_cs5[] = {GPIO9};
240 static const unsigned pins_spi_cs6[] = {GPIO11};
241
242 static const unsigned pins_gpt1[] = {GPIO28};
243 static const unsigned pins_gpt2[] = {GPIO21};
244 static const unsigned pins_gpt3[] = {GPIO6};
245
246 static const unsigned pins_clkout0[] = {GPIO8};
247 static const unsigned pins_clkout1[] = {GPIO7};
248 static const unsigned pins_clkout2[] = {GPIO3};
249 static const unsigned pins_clkout3[] = {GPIO2};
250
251 static const unsigned pins_pci_gnt1[] = {GPIO30};
252 static const unsigned pins_pci_gnt2[] = {GPIO23};
253 static const unsigned pins_pci_gnt3[] = {GPIO19};
254 static const unsigned pins_pci_gnt4[] = {GPIO38};
255 static const unsigned pins_pci_req1[] = {GPIO29};
256 static const unsigned pins_pci_req2[] = {GPIO31};
257 static const unsigned pins_pci_req3[] = {GPIO3};
258 static const unsigned pins_pci_req4[] = {GPIO37};
259
260 static const unsigned ase_pins_jtag[] = {GPIO7, GPIO8, GPIO9, GPIO10, GPIO11};
261 static const unsigned ase_pins_asc[] = {GPIO5, GPIO6};
262 static const unsigned ase_pins_stp[] = {GPIO1, GPIO2, GPIO3};
263 static const unsigned ase_pins_ephy[] = {GPIO2, GPIO3, GPIO4};
264 static const unsigned ase_pins_dfe[] = {GPIO1, GPIO2};
265
266 static const unsigned ase_pins_spi[] = {GPIO8, GPIO9, GPIO10};
267 static const unsigned ase_pins_spi_cs1[] = {GPIO7};
268 static const unsigned ase_pins_spi_cs2[] = {GPIO15};
269 static const unsigned ase_pins_spi_cs3[] = {GPIO14};
270
271 static const unsigned ase_pins_exin0[] = {GPIO6};
272 static const unsigned ase_pins_exin1[] = {GPIO29};
273 static const unsigned ase_pins_exin2[] = {GPIO0};
274
275 static const unsigned ase_pins_gpt1[] = {GPIO5};
276 static const unsigned ase_pins_gpt2[] = {GPIO4};
277 static const unsigned ase_pins_gpt3[] = {GPIO25};
278
279 static const struct ltq_pin_group xway_grps[] = {
280 GRP_MUX("exin0", EXIN, pins_exin0),
281 GRP_MUX("exin1", EXIN, pins_exin1),
282 GRP_MUX("exin2", EXIN, pins_exin2),
283 GRP_MUX("jtag", JTAG, pins_jtag),
284 GRP_MUX("ebu a23", EBU, pins_ebu_a23),
285 GRP_MUX("ebu a24", EBU, pins_ebu_a24),
286 GRP_MUX("ebu a25", EBU, pins_ebu_a25),
287 GRP_MUX("ebu clk", EBU, pins_ebu_clk),
288 GRP_MUX("ebu cs1", EBU, pins_ebu_cs1),
289 GRP_MUX("ebu wait", EBU, pins_ebu_wait),
290 GRP_MUX("nand ale", EBU, pins_nand_ale),
291 GRP_MUX("nand cs1", EBU, pins_nand_cs1),
292 GRP_MUX("nand cle", EBU, pins_nand_cle),
293 GRP_MUX("spi", SPI, pins_spi),
294 GRP_MUX("spi_cs1", SPI, pins_spi_cs1),
295 GRP_MUX("spi_cs2", SPI, pins_spi_cs2),
296 GRP_MUX("spi_cs3", SPI, pins_spi_cs3),
297 GRP_MUX("spi_cs4", SPI, pins_spi_cs4),
298 GRP_MUX("spi_cs5", SPI, pins_spi_cs5),
299 GRP_MUX("spi_cs6", SPI, pins_spi_cs6),
300 GRP_MUX("asc0", ASC, pins_asc0),
301 GRP_MUX("asc0 cts rts", ASC, pins_asc0_cts_rts),
302 GRP_MUX("stp", STP, pins_stp),
303 GRP_MUX("nmi", NMI, pins_nmi),
304 GRP_MUX("gpt1", GPT, pins_gpt1),
305 GRP_MUX("gpt2", GPT, pins_gpt2),
306 GRP_MUX("gpt3", GPT, pins_gpt3),
307 GRP_MUX("clkout0", CGU, pins_clkout0),
308 GRP_MUX("clkout1", CGU, pins_clkout1),
309 GRP_MUX("clkout2", CGU, pins_clkout2),
310 GRP_MUX("clkout3", CGU, pins_clkout3),
311 GRP_MUX("gnt1", PCI, pins_pci_gnt1),
312 GRP_MUX("gnt2", PCI, pins_pci_gnt2),
313 GRP_MUX("gnt3", PCI, pins_pci_gnt3),
314 GRP_MUX("req1", PCI, pins_pci_req1),
315 GRP_MUX("req2", PCI, pins_pci_req2),
316 GRP_MUX("req3", PCI, pins_pci_req3),
317 /* xrx only */
318 GRP_MUX("nand rdy", EBU, pins_nand_rdy),
319 GRP_MUX("nand rd", EBU, pins_nand_rd),
320 GRP_MUX("exin3", EXIN, pins_exin3),
321 GRP_MUX("exin4", EXIN, pins_exin4),
322 GRP_MUX("exin5", EXIN, pins_exin5),
323 GRP_MUX("gnt4", PCI, pins_pci_gnt4),
324 GRP_MUX("req4", PCI, pins_pci_gnt4),
325 GRP_MUX("mdio", MDIO, pins_mdio),
326 };
327
328 static const struct ltq_pin_group ase_grps[] = {
329 GRP_MUX("exin0", EXIN, ase_pins_exin0),
330 GRP_MUX("exin1", EXIN, ase_pins_exin1),
331 GRP_MUX("exin2", EXIN, ase_pins_exin2),
332 GRP_MUX("jtag", JTAG, ase_pins_jtag),
333 GRP_MUX("stp", STP, ase_pins_stp),
334 GRP_MUX("asc", ASC, ase_pins_asc),
335 GRP_MUX("gpt1", GPT, ase_pins_gpt1),
336 GRP_MUX("gpt2", GPT, ase_pins_gpt2),
337 GRP_MUX("gpt3", GPT, ase_pins_gpt3),
338 GRP_MUX("ephy", EPHY, ase_pins_ephy),
339 GRP_MUX("dfe", DFE, ase_pins_dfe),
340 GRP_MUX("spi", SPI, ase_pins_spi),
341 GRP_MUX("spi_cs1", SPI, ase_pins_spi_cs1),
342 GRP_MUX("spi_cs2", SPI, ase_pins_spi_cs2),
343 GRP_MUX("spi_cs3", SPI, ase_pins_spi_cs3),
344 };
345
346 static const char * const xway_pci_grps[] = {"gnt1", "gnt2",
347 "gnt3", "req1",
348 "req2", "req3"};
349 static const char * const xway_spi_grps[] = {"spi", "spi_cs1",
350 "spi_cs2", "spi_cs3",
351 "spi_cs4", "spi_cs5",
352 "spi_cs6"};
353 static const char * const xway_cgu_grps[] = {"clkout0", "clkout1",
354 "clkout2", "clkout3"};
355 static const char * const xway_ebu_grps[] = {"ebu a23", "ebu a24",
356 "ebu a25", "ebu cs1",
357 "ebu wait", "ebu clk",
358 "nand ale", "nand cs1",
359 "nand cle"};
360 static const char * const xway_exin_grps[] = {"exin0", "exin1", "exin2"};
361 static const char * const xway_gpt_grps[] = {"gpt1", "gpt2", "gpt3"};
362 static const char * const xway_asc_grps[] = {"asc0", "asc0 cts rts"};
363 static const char * const xway_jtag_grps[] = {"jtag"};
364 static const char * const xway_stp_grps[] = {"stp"};
365 static const char * const xway_nmi_grps[] = {"nmi"};
366
367 /* ar9/vr9/gr9 */
368 static const char * const xrx_mdio_grps[] = {"mdio"};
369 static const char * const xrx_ebu_grps[] = {"ebu a23", "ebu a24",
370 "ebu a25", "ebu cs1",
371 "ebu wait", "ebu clk",
372 "nand ale", "nand cs1",
373 "nand cle", "nand rdy",
374 "nand rd"};
375 static const char * const xrx_exin_grps[] = {"exin0", "exin1", "exin2",
376 "exin3", "exin4", "exin5"};
377 static const char * const xrx_pci_grps[] = {"gnt1", "gnt2",
378 "gnt3", "gnt4",
379 "req1", "req2",
380 "req3", "req4"};
381
382 /* ase */
383 static const char * const ase_exin_grps[] = {"exin0", "exin1", "exin2"};
384 static const char * const ase_gpt_grps[] = {"gpt1", "gpt2", "gpt3"};
385 static const char * const ase_dfe_grps[] = {"dfe"};
386 static const char * const ase_ephy_grps[] = {"ephy"};
387 static const char * const ase_asc_grps[] = {"asc"};
388 static const char * const ase_jtag_grps[] = {"jtag"};
389 static const char * const ase_stp_grps[] = {"stp"};
390 static const char * const ase_spi_grps[] = {"spi", "spi_cs1",
391 "spi_cs2", "spi_cs3"};
392
393 static const struct ltq_pmx_func danube_funcs[] = {
394 {"spi", ARRAY_AND_SIZE(xway_spi_grps)},
395 {"asc", ARRAY_AND_SIZE(xway_asc_grps)},
396 {"cgu", ARRAY_AND_SIZE(xway_cgu_grps)},
397 {"jtag", ARRAY_AND_SIZE(xway_jtag_grps)},
398 {"exin", ARRAY_AND_SIZE(xway_exin_grps)},
399 {"stp", ARRAY_AND_SIZE(xway_stp_grps)},
400 {"gpt", ARRAY_AND_SIZE(xway_gpt_grps)},
401 {"nmi", ARRAY_AND_SIZE(xway_nmi_grps)},
402 {"pci", ARRAY_AND_SIZE(xway_pci_grps)},
403 {"ebu", ARRAY_AND_SIZE(xway_ebu_grps)},
404 };
405
406 static const struct ltq_pmx_func xrx_funcs[] = {
407 {"spi", ARRAY_AND_SIZE(xway_spi_grps)},
408 {"asc", ARRAY_AND_SIZE(xway_asc_grps)},
409 {"cgu", ARRAY_AND_SIZE(xway_cgu_grps)},
410 {"jtag", ARRAY_AND_SIZE(xway_jtag_grps)},
411 {"exin", ARRAY_AND_SIZE(xrx_exin_grps)},
412 {"stp", ARRAY_AND_SIZE(xway_stp_grps)},
413 {"gpt", ARRAY_AND_SIZE(xway_gpt_grps)},
414 {"nmi", ARRAY_AND_SIZE(xway_nmi_grps)},
415 {"pci", ARRAY_AND_SIZE(xrx_pci_grps)},
416 {"ebu", ARRAY_AND_SIZE(xrx_ebu_grps)},
417 {"mdio", ARRAY_AND_SIZE(xrx_mdio_grps)},
418 };
419
420 static const struct ltq_pmx_func ase_funcs[] = {
421 {"spi", ARRAY_AND_SIZE(ase_spi_grps)},
422 {"asc", ARRAY_AND_SIZE(ase_asc_grps)},
423 {"jtag", ARRAY_AND_SIZE(ase_jtag_grps)},
424 {"exin", ARRAY_AND_SIZE(ase_exin_grps)},
425 {"stp", ARRAY_AND_SIZE(ase_stp_grps)},
426 {"gpt", ARRAY_AND_SIZE(ase_gpt_grps)},
427 {"ephy", ARRAY_AND_SIZE(ase_ephy_grps)},
428 {"dfe", ARRAY_AND_SIZE(ase_dfe_grps)},
429 };
430
431 /* --------- pinconf related code --------- */
432 static int xway_pinconf_get(struct pinctrl_dev *pctldev,
433 unsigned pin,
434 unsigned long *config)
435 {
436 struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctldev);
437 enum ltq_pinconf_param param = LTQ_PINCONF_UNPACK_PARAM(*config);
438 int port = PORT(pin);
439 u32 reg;
440
441 switch (param) {
442 case LTQ_PINCONF_PARAM_OPEN_DRAIN:
443 if (port == PORT3)
444 reg = GPIO3_OD;
445 else
446 reg = GPIO_OD(port);
447 *config = LTQ_PINCONF_PACK(param,
448 !!gpio_getbit(info->membase[0], reg, PORT_PIN(port)));
449 break;
450
451 case LTQ_PINCONF_PARAM_PULL:
452 if (port == PORT3)
453 reg = GPIO3_PUDEN;
454 else
455 reg = GPIO_PUDEN(port);
456 if (!gpio_getbit(info->membase[0], reg, PORT_PIN(port))) {
457 *config = LTQ_PINCONF_PACK(param, 0);
458 break;
459 }
460
461 if (port == PORT3)
462 reg = GPIO3_PUDSEL;
463 else
464 reg = GPIO_PUDSEL(port);
465 if (!gpio_getbit(info->membase[0], reg, PORT_PIN(port)))
466 *config = LTQ_PINCONF_PACK(param, 2);
467 else
468 *config = LTQ_PINCONF_PACK(param, 1);
469 break;
470
471 default:
472 dev_err(pctldev->dev, "Invalid config param %04x\n", param);
473 return -ENOTSUPP;
474 }
475 return 0;
476 }
477
478 static int xway_pinconf_set(struct pinctrl_dev *pctldev,
479 unsigned pin,
480 unsigned long config)
481 {
482 struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctldev);
483 enum ltq_pinconf_param param = LTQ_PINCONF_UNPACK_PARAM(config);
484 int arg = LTQ_PINCONF_UNPACK_ARG(config);
485 int port = PORT(pin);
486 u32 reg;
487
488 switch (param) {
489 case LTQ_PINCONF_PARAM_OPEN_DRAIN:
490 if (port == PORT3)
491 reg = GPIO3_OD;
492 else
493 reg = GPIO_OD(port);
494 gpio_setbit(info->membase[0], reg, PORT_PIN(port));
495 break;
496
497 case LTQ_PINCONF_PARAM_PULL:
498 if (port == PORT3)
499 reg = GPIO3_PUDEN;
500 else
501 reg = GPIO_PUDEN(port);
502 if (arg == 0) {
503 gpio_clearbit(info->membase[0], reg, PORT_PIN(port));
504 break;
505 }
506 gpio_setbit(info->membase[0], reg, PORT_PIN(port));
507
508 if (port == PORT3)
509 reg = GPIO3_PUDSEL;
510 else
511 reg = GPIO_PUDSEL(port);
512 if (arg == 1)
513 gpio_clearbit(info->membase[0], reg, PORT_PIN(port));
514 else if (arg == 2)
515 gpio_setbit(info->membase[0], reg, PORT_PIN(port));
516 else
517 dev_err(pctldev->dev, "Invalid pull value %d\n", arg);
518 break;
519
520 default:
521 dev_err(pctldev->dev, "Invalid config param %04x\n", param);
522 return -ENOTSUPP;
523 }
524 return 0;
525 }
526
527 struct pinconf_ops xway_pinconf_ops = {
528 .pin_config_get = xway_pinconf_get,
529 .pin_config_set = xway_pinconf_set,
530 };
531
532 static struct pinctrl_desc xway_pctrl_desc = {
533 .owner = THIS_MODULE,
534 .confops = &xway_pinconf_ops,
535 };
536
537 static inline int xway_mux_apply(struct pinctrl_dev *pctrldev,
538 int pin, int mux)
539 {
540 struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
541 int port = PORT(pin);
542 u32 alt1_reg = GPIO_ALT1(pin);
543
544 if (port == PORT3)
545 alt1_reg = GPIO3_ALT1;
546
547 if (mux & MUX_ALT0)
548 gpio_setbit(info->membase[0], GPIO_ALT0(pin), PORT_PIN(pin));
549 else
550 gpio_clearbit(info->membase[0], GPIO_ALT0(pin), PORT_PIN(pin));
551
552 if (mux & MUX_ALT1)
553 gpio_setbit(info->membase[0], alt1_reg, PORT_PIN(pin));
554 else
555 gpio_clearbit(info->membase[0], alt1_reg, PORT_PIN(pin));
556
557 return 0;
558 }
559
560 static const struct ltq_cfg_param xway_cfg_params[] = {
561 {"lantiq,pull", LTQ_PINCONF_PARAM_PULL},
562 {"lantiq,open-drain", LTQ_PINCONF_PARAM_OPEN_DRAIN},
563 };
564
565 static struct ltq_pinmux_info xway_info = {
566 .desc = &xway_pctrl_desc,
567 .apply_mux = xway_mux_apply,
568 .params = xway_cfg_params,
569 .num_params = ARRAY_SIZE(xway_cfg_params),
570 };
571
572 /* --------- gpio_chip related code --------- */
573 static void xway_gpio_set(struct gpio_chip *chip, unsigned int pin, int val)
574 {
575 struct ltq_pinmux_info *info = dev_get_drvdata(chip->dev);
576
577 if (val)
578 gpio_setbit(info->membase[0], GPIO_OUT(pin), PORT_PIN(pin));
579 else
580 gpio_clearbit(info->membase[0], GPIO_OUT(pin), PORT_PIN(pin));
581 }
582
583 static int xway_gpio_get(struct gpio_chip *chip, unsigned int pin)
584 {
585 struct ltq_pinmux_info *info = dev_get_drvdata(chip->dev);
586
587 return gpio_getbit(info->membase[0], GPIO_IN(pin), PORT_PIN(pin));
588 }
589
590 static int xway_gpio_dir_in(struct gpio_chip *chip, unsigned int pin)
591 {
592 struct ltq_pinmux_info *info = dev_get_drvdata(chip->dev);
593
594 gpio_clearbit(info->membase[0], GPIO_DIR(pin), PORT_PIN(pin));
595
596 return 0;
597 }
598
599 static int xway_gpio_dir_out(struct gpio_chip *chip, unsigned int pin, int val)
600 {
601 struct ltq_pinmux_info *info = dev_get_drvdata(chip->dev);
602
603 gpio_setbit(info->membase[0], GPIO_DIR(pin), PORT_PIN(pin));
604 xway_gpio_set(chip, pin, val);
605
606 return 0;
607 }
608
609 static int xway_gpio_req(struct gpio_chip *chip, unsigned offset)
610 {
611 int gpio = chip->base + offset;
612
613 return pinctrl_request_gpio(gpio);
614 }
615
616 static void xway_gpio_free(struct gpio_chip *chip, unsigned offset)
617 {
618 int gpio = chip->base + offset;
619
620 pinctrl_free_gpio(gpio);
621 }
622
623 static struct gpio_chip xway_chip = {
624 .label = "gpio-xway",
625 .direction_input = xway_gpio_dir_in,
626 .direction_output = xway_gpio_dir_out,
627 .get = xway_gpio_get,
628 .set = xway_gpio_set,
629 .request = xway_gpio_req,
630 .free = xway_gpio_free,
631 .base = -1,
632 };
633
634
635 /* --------- register the pinctrl layer --------- */
636 static const unsigned xway_exin_pin_map[] = {GPIO0, GPIO1, GPIO2, GPIO39, GPIO46, GPIO9};
637 static const unsigned ase_exin_pins_map[] = {GPIO6, GPIO29, GPIO0};
638
639 static struct pinctrl_xway_soc {
640 int pin_count;
641 const struct ltq_mfp_pin *mfp;
642 const struct ltq_pin_group *grps;
643 unsigned int num_grps;
644 const struct ltq_pmx_func *funcs;
645 unsigned int num_funcs;
646 const unsigned *exin;
647 unsigned int num_exin;
648 } soc_cfg[] = {
649 /* legacy xway */
650 {XWAY_MAX_PIN, xway_mfp,
651 xway_grps, ARRAY_SIZE(xway_grps),
652 danube_funcs, ARRAY_SIZE(danube_funcs),
653 xway_exin_pin_map, 3},
654 /* xway xr9 series */
655 {XR9_MAX_PIN, xway_mfp,
656 xway_grps, ARRAY_SIZE(xway_grps),
657 xrx_funcs, ARRAY_SIZE(xrx_funcs),
658 xway_exin_pin_map, 6},
659 /* xway ase series */
660 {XWAY_MAX_PIN, ase_mfp,
661 ase_grps, ARRAY_SIZE(ase_grps),
662 ase_funcs, ARRAY_SIZE(ase_funcs),
663 ase_exin_pins_map, 3},
664 };
665
666 static struct pinctrl_gpio_range xway_gpio_range = {
667 .name = "XWAY GPIO",
668 .gc = &xway_chip,
669 };
670
671 static const struct of_device_id xway_match[] = {
672 { .compatible = "lantiq,pinctrl-xway", .data = &soc_cfg[0]},
673 { .compatible = "lantiq,pinctrl-xr9", .data = &soc_cfg[1]},
674 { .compatible = "lantiq,pinctrl-ase", .data = &soc_cfg[2]},
675 {},
676 };
677 MODULE_DEVICE_TABLE(of, xway_match);
678
679 static int __devinit pinmux_xway_probe(struct platform_device *pdev)
680 {
681 const struct of_device_id *match;
682 const struct pinctrl_xway_soc *xway_soc;
683 struct resource *res;
684 int ret, i;
685
686 /* get and remap our register range */
687 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
688 if (!res) {
689 dev_err(&pdev->dev, "Failed to get resource\n");
690 return -ENOENT;
691 }
692 xway_info.membase[0] = devm_request_and_ioremap(&pdev->dev, res);
693 if (!xway_info.membase[0]) {
694 dev_err(&pdev->dev, "Failed to remap resource\n");
695 return -ENOMEM;
696 }
697
698 match = of_match_device(xway_match, &pdev->dev);
699 if (match)
700 xway_soc = (const struct pinctrl_xway_soc *) match->data;
701 else
702 xway_soc = &soc_cfg[0];
703
704 /* find out how many pads we have */
705 xway_chip.ngpio = xway_soc->pin_count;
706
707 /* load our pad descriptors */
708 xway_info.pads = devm_kzalloc(&pdev->dev,
709 sizeof(struct pinctrl_pin_desc) * xway_chip.ngpio,
710 GFP_KERNEL);
711 if (!xway_info.pads) {
712 dev_err(&pdev->dev, "Failed to allocate pads\n");
713 return -ENOMEM;
714 }
715 for (i = 0; i < xway_chip.ngpio; i++) {
716 /* strlen("ioXY") + 1 = 5 */
717 char *name = devm_kzalloc(&pdev->dev, 5, GFP_KERNEL);
718
719 if (!name) {
720 dev_err(&pdev->dev, "Failed to allocate pad name\n");
721 return -ENOMEM;
722 }
723 snprintf(name, 5, "io%d", i);
724 xway_info.pads[i].number = GPIO0 + i;
725 xway_info.pads[i].name = name;
726 }
727 xway_pctrl_desc.pins = xway_info.pads;
728
729 /* load the gpio chip */
730 xway_chip.dev = &pdev->dev;
731 of_gpiochip_add(&xway_chip);
732 ret = gpiochip_add(&xway_chip);
733 if (ret) {
734 dev_err(&pdev->dev, "Failed to register gpio chip\n");
735 return ret;
736 }
737
738 /* setup the data needed by pinctrl */
739 xway_pctrl_desc.name = dev_name(&pdev->dev);
740 xway_pctrl_desc.npins = xway_chip.ngpio;
741
742 xway_info.num_pads = xway_chip.ngpio;
743 xway_info.num_mfp = xway_chip.ngpio;
744 xway_info.mfp = xway_soc->mfp;
745 xway_info.grps = xway_soc->grps;
746 xway_info.num_grps = xway_soc->num_grps;
747 xway_info.funcs = xway_soc->funcs;
748 xway_info.num_funcs = xway_soc->num_funcs;
749 xway_info.exin = xway_soc->exin;
750 xway_info.num_exin = xway_soc->num_exin;
751
752 /* register with the generic lantiq layer */
753 ret = ltq_pinctrl_register(pdev, &xway_info);
754 if (ret) {
755 dev_err(&pdev->dev, "Failed to register pinctrl driver\n");
756 return ret;
757 }
758
759 /* finish with registering the gpio range in pinctrl */
760 xway_gpio_range.npins = xway_chip.ngpio;
761 xway_gpio_range.base = xway_chip.base;
762 pinctrl_add_gpio_range(xway_info.pctrl, &xway_gpio_range);
763 dev_info(&pdev->dev, "Init done\n");
764 return 0;
765 }
766
767 static struct platform_driver pinmux_xway_driver = {
768 .probe = pinmux_xway_probe,
769 .driver = {
770 .name = "pinctrl-xway",
771 .owner = THIS_MODULE,
772 .of_match_table = xway_match,
773 },
774 };
775
776 static int __init pinmux_xway_init(void)
777 {
778 return platform_driver_register(&pinmux_xway_driver);
779 }
780
781 core_initcall_sync(pinmux_xway_init);
Linux kernel - Deliverables
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