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path: root/drivers/pinctrl/pinctrl-falcon.c
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-rw-r--r--drivers/pinctrl/pinctrl-falcon.c468
1 files changed, 468 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-falcon.c b/drivers/pinctrl/pinctrl-falcon.c
new file mode 100644
index 000000000000..ee7305903470
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-falcon.c
@@ -0,0 +1,468 @@
1/*
2 * linux/drivers/pinctrl/pinmux-falcon.c
3 * based on linux/drivers/pinctrl/pinmux-pxa910.c
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published
7 * by the Free Software Foundation.
8 *
9 * Copyright (C) 2012 Thomas Langer <thomas.langer@lantiq.com>
10 * Copyright (C) 2012 John Crispin <blogic@openwrt.org>
11 */
12
13#include <linux/gpio.h>
14#include <linux/interrupt.h>
15#include <linux/slab.h>
16#include <linux/export.h>
17#include <linux/err.h>
18#include <linux/module.h>
19#include <linux/of.h>
20#include <linux/of_platform.h>
21#include <linux/of_address.h>
22#include <linux/of_gpio.h>
23#include <linux/platform_device.h>
24
25#include "pinctrl-lantiq.h"
26
27#include <lantiq_soc.h>
28
29/* Multiplexer Control Register */
30#define LTQ_PADC_MUX(x) (x * 0x4)
31/* Pull Up Enable Register */
32#define LTQ_PADC_PUEN 0x80
33/* Pull Down Enable Register */
34#define LTQ_PADC_PDEN 0x84
35/* Slew Rate Control Register */
36#define LTQ_PADC_SRC 0x88
37/* Drive Current Control Register */
38#define LTQ_PADC_DCC 0x8C
39/* Pad Control Availability Register */
40#define LTQ_PADC_AVAIL 0xF0
41
42#define pad_r32(p, reg) ltq_r32(p + reg)
43#define pad_w32(p, val, reg) ltq_w32(val, p + reg)
44#define pad_w32_mask(c, clear, set, reg) \
45 pad_w32(c, (pad_r32(c, reg) & ~(clear)) | (set), reg)
46
47#define pad_getbit(m, r, p) (!!(ltq_r32(m + r) & (1 << p)))
48
49#define PORTS 5
50#define PINS 32
51#define PORT(x) (x / PINS)
52#define PORT_PIN(x) (x % PINS)
53
54#define MFP_FALCON(a, f0, f1, f2, f3) \
55{ \
56 .name = #a, \
57 .pin = a, \
58 .func = { \
59 FALCON_MUX_##f0, \
60 FALCON_MUX_##f1, \
61 FALCON_MUX_##f2, \
62 FALCON_MUX_##f3, \
63 }, \
64}
65
66#define GRP_MUX(a, m, p) \
67{ \
68 .name = a, \
69 .mux = FALCON_MUX_##m, \
70 .pins = p, \
71 .npins = ARRAY_SIZE(p), \
72}
73
74enum falcon_mux {
75 FALCON_MUX_GPIO = 0,
76 FALCON_MUX_RST,
77 FALCON_MUX_NTR,
78 FALCON_MUX_MDIO,
79 FALCON_MUX_LED,
80 FALCON_MUX_SPI,
81 FALCON_MUX_ASC,
82 FALCON_MUX_I2C,
83 FALCON_MUX_HOSTIF,
84 FALCON_MUX_SLIC,
85 FALCON_MUX_JTAG,
86 FALCON_MUX_PCM,
87 FALCON_MUX_MII,
88 FALCON_MUX_PHY,
89 FALCON_MUX_NONE = 0xffff,
90};
91
92static struct pinctrl_pin_desc falcon_pads[PORTS * PINS];
93static int pad_count[PORTS];
94
95static void lantiq_load_pin_desc(struct pinctrl_pin_desc *d, int bank, int len)
96{
97 int base = bank * PINS;
98 int i;
99
100 for (i = 0; i < len; i++) {
101 /* strlen("ioXYZ") + 1 = 6 */
102 char *name = kzalloc(6, GFP_KERNEL);
103 snprintf(name, 6, "io%d", base + i);
104 d[i].number = base + i;
105 d[i].name = name;
106 }
107 pad_count[bank] = len;
108}
109
110static struct ltq_mfp_pin falcon_mfp[] = {
111 /* pin f0 f1 f2 f3 */
112 MFP_FALCON(GPIO0, RST, GPIO, NONE, NONE),
113 MFP_FALCON(GPIO1, GPIO, GPIO, NONE, NONE),
114 MFP_FALCON(GPIO2, GPIO, GPIO, NONE, NONE),
115 MFP_FALCON(GPIO3, GPIO, GPIO, NONE, NONE),
116 MFP_FALCON(GPIO4, NTR, GPIO, NONE, NONE),
117 MFP_FALCON(GPIO5, NTR, GPIO, NONE, NONE),
118 MFP_FALCON(GPIO6, RST, GPIO, NONE, NONE),
119 MFP_FALCON(GPIO7, MDIO, GPIO, NONE, NONE),
120 MFP_FALCON(GPIO8, MDIO, GPIO, NONE, NONE),
121 MFP_FALCON(GPIO9, LED, GPIO, NONE, NONE),
122 MFP_FALCON(GPIO10, LED, GPIO, NONE, NONE),
123 MFP_FALCON(GPIO11, LED, GPIO, NONE, NONE),
124 MFP_FALCON(GPIO12, LED, GPIO, NONE, NONE),
125 MFP_FALCON(GPIO13, LED, GPIO, NONE, NONE),
126 MFP_FALCON(GPIO14, LED, GPIO, NONE, NONE),
127 MFP_FALCON(GPIO32, ASC, GPIO, NONE, NONE),
128 MFP_FALCON(GPIO33, ASC, GPIO, NONE, NONE),
129 MFP_FALCON(GPIO34, SPI, GPIO, NONE, NONE),
130 MFP_FALCON(GPIO35, SPI, GPIO, NONE, NONE),
131 MFP_FALCON(GPIO36, SPI, GPIO, NONE, NONE),
132 MFP_FALCON(GPIO37, SPI, GPIO, NONE, NONE),
133 MFP_FALCON(GPIO38, SPI, GPIO, NONE, NONE),
134 MFP_FALCON(GPIO39, I2C, GPIO, NONE, NONE),
135 MFP_FALCON(GPIO40, I2C, GPIO, NONE, NONE),
136 MFP_FALCON(GPIO41, HOSTIF, GPIO, HOSTIF, JTAG),
137 MFP_FALCON(GPIO42, HOSTIF, GPIO, HOSTIF, NONE),
138 MFP_FALCON(GPIO43, SLIC, GPIO, NONE, NONE),
139 MFP_FALCON(GPIO44, SLIC, GPIO, PCM, ASC),
140 MFP_FALCON(GPIO45, SLIC, GPIO, PCM, ASC),
141 MFP_FALCON(GPIO64, MII, GPIO, NONE, NONE),
142 MFP_FALCON(GPIO65, MII, GPIO, NONE, NONE),
143 MFP_FALCON(GPIO66, MII, GPIO, NONE, NONE),
144 MFP_FALCON(GPIO67, MII, GPIO, NONE, NONE),
145 MFP_FALCON(GPIO68, MII, GPIO, NONE, NONE),
146 MFP_FALCON(GPIO69, MII, GPIO, NONE, NONE),
147 MFP_FALCON(GPIO70, MII, GPIO, NONE, NONE),
148 MFP_FALCON(GPIO71, MII, GPIO, NONE, NONE),
149 MFP_FALCON(GPIO72, MII, GPIO, NONE, NONE),
150 MFP_FALCON(GPIO73, MII, GPIO, NONE, NONE),
151 MFP_FALCON(GPIO74, MII, GPIO, NONE, NONE),
152 MFP_FALCON(GPIO75, MII, GPIO, NONE, NONE),
153 MFP_FALCON(GPIO76, MII, GPIO, NONE, NONE),
154 MFP_FALCON(GPIO77, MII, GPIO, NONE, NONE),
155 MFP_FALCON(GPIO78, MII, GPIO, NONE, NONE),
156 MFP_FALCON(GPIO79, MII, GPIO, NONE, NONE),
157 MFP_FALCON(GPIO80, MII, GPIO, NONE, NONE),
158 MFP_FALCON(GPIO81, MII, GPIO, NONE, NONE),
159 MFP_FALCON(GPIO82, MII, GPIO, NONE, NONE),
160 MFP_FALCON(GPIO83, MII, GPIO, NONE, NONE),
161 MFP_FALCON(GPIO84, MII, GPIO, NONE, NONE),
162 MFP_FALCON(GPIO85, MII, GPIO, NONE, NONE),
163 MFP_FALCON(GPIO86, MII, GPIO, NONE, NONE),
164 MFP_FALCON(GPIO87, MII, GPIO, NONE, NONE),
165 MFP_FALCON(GPIO88, PHY, GPIO, NONE, NONE),
166};
167
168static const unsigned pins_por[] = {GPIO0};
169static const unsigned pins_ntr[] = {GPIO4};
170static const unsigned pins_ntr8k[] = {GPIO5};
171static const unsigned pins_hrst[] = {GPIO6};
172static const unsigned pins_mdio[] = {GPIO7, GPIO8};
173static const unsigned pins_bled[] = {GPIO7, GPIO10, GPIO11,
174 GPIO12, GPIO13, GPIO14};
175static const unsigned pins_asc0[] = {GPIO32, GPIO33};
176static const unsigned pins_spi[] = {GPIO34, GPIO35, GPIO36};
177static const unsigned pins_spi_cs0[] = {GPIO37};
178static const unsigned pins_spi_cs1[] = {GPIO38};
179static const unsigned pins_i2c[] = {GPIO39, GPIO40};
180static const unsigned pins_jtag[] = {GPIO41};
181static const unsigned pins_slic[] = {GPIO43, GPIO44, GPIO45};
182static const unsigned pins_pcm[] = {GPIO44, GPIO45};
183static const unsigned pins_asc1[] = {GPIO44, GPIO45};
184
185static struct ltq_pin_group falcon_grps[] = {
186 GRP_MUX("por", RST, pins_por),
187 GRP_MUX("ntr", NTR, pins_ntr),
188 GRP_MUX("ntr8k", NTR, pins_ntr8k),
189 GRP_MUX("hrst", RST, pins_hrst),
190 GRP_MUX("mdio", MDIO, pins_mdio),
191 GRP_MUX("bootled", LED, pins_bled),
192 GRP_MUX("asc0", ASC, pins_asc0),
193 GRP_MUX("spi", SPI, pins_spi),
194 GRP_MUX("spi cs0", SPI, pins_spi_cs0),
195 GRP_MUX("spi cs1", SPI, pins_spi_cs1),
196 GRP_MUX("i2c", I2C, pins_i2c),
197 GRP_MUX("jtag", JTAG, pins_jtag),
198 GRP_MUX("slic", SLIC, pins_slic),
199 GRP_MUX("pcm", PCM, pins_pcm),
200 GRP_MUX("asc1", ASC, pins_asc1),
201};
202
203static const char * const ltq_rst_grps[] = {"por", "hrst"};
204static const char * const ltq_ntr_grps[] = {"ntr", "ntr8k"};
205static const char * const ltq_mdio_grps[] = {"mdio"};
206static const char * const ltq_bled_grps[] = {"bootled"};
207static const char * const ltq_asc_grps[] = {"asc0", "asc1"};
208static const char * const ltq_spi_grps[] = {"spi", "spi cs0", "spi cs1"};
209static const char * const ltq_i2c_grps[] = {"i2c"};
210static const char * const ltq_jtag_grps[] = {"jtag"};
211static const char * const ltq_slic_grps[] = {"slic"};
212static const char * const ltq_pcm_grps[] = {"pcm"};
213
214static struct ltq_pmx_func falcon_funcs[] = {
215 {"rst", ARRAY_AND_SIZE(ltq_rst_grps)},
216 {"ntr", ARRAY_AND_SIZE(ltq_ntr_grps)},
217 {"mdio", ARRAY_AND_SIZE(ltq_mdio_grps)},
218 {"led", ARRAY_AND_SIZE(ltq_bled_grps)},
219 {"asc", ARRAY_AND_SIZE(ltq_asc_grps)},
220 {"spi", ARRAY_AND_SIZE(ltq_spi_grps)},
221 {"i2c", ARRAY_AND_SIZE(ltq_i2c_grps)},
222 {"jtag", ARRAY_AND_SIZE(ltq_jtag_grps)},
223 {"slic", ARRAY_AND_SIZE(ltq_slic_grps)},
224 {"pcm", ARRAY_AND_SIZE(ltq_pcm_grps)},
225};
226
227
228
229
230/* --------- pinconf related code --------- */
231static int falcon_pinconf_group_get(struct pinctrl_dev *pctrldev,
232 unsigned group, unsigned long *config)
233{
234 return -ENOTSUPP;
235}
236
237static int falcon_pinconf_group_set(struct pinctrl_dev *pctrldev,
238 unsigned group, unsigned long config)
239{
240 return -ENOTSUPP;
241}
242
243static int falcon_pinconf_get(struct pinctrl_dev *pctrldev,
244 unsigned pin, unsigned long *config)
245{
246 struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
247 enum ltq_pinconf_param param = LTQ_PINCONF_UNPACK_PARAM(*config);
248 void __iomem *mem = info->membase[PORT(pin)];
249
250 switch (param) {
251 case LTQ_PINCONF_PARAM_DRIVE_CURRENT:
252 *config = LTQ_PINCONF_PACK(param,
253 !!pad_getbit(mem, LTQ_PADC_DCC, PORT_PIN(pin)));
254 break;
255
256 case LTQ_PINCONF_PARAM_SLEW_RATE:
257 *config = LTQ_PINCONF_PACK(param,
258 !!pad_getbit(mem, LTQ_PADC_SRC, PORT_PIN(pin)));
259 break;
260
261 case LTQ_PINCONF_PARAM_PULL:
262 if (pad_getbit(mem, LTQ_PADC_PDEN, PORT_PIN(pin)))
263 *config = LTQ_PINCONF_PACK(param, 1);
264 else if (pad_getbit(mem, LTQ_PADC_PUEN, PORT_PIN(pin)))
265 *config = LTQ_PINCONF_PACK(param, 2);
266 else
267 *config = LTQ_PINCONF_PACK(param, 0);
268
269 break;
270
271 default:
272 return -ENOTSUPP;
273 }
274
275 return 0;
276}
277
278static int falcon_pinconf_set(struct pinctrl_dev *pctrldev,
279 unsigned pin, unsigned long config)
280{
281 enum ltq_pinconf_param param = LTQ_PINCONF_UNPACK_PARAM(config);
282 int arg = LTQ_PINCONF_UNPACK_ARG(config);
283 struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
284 void __iomem *mem = info->membase[PORT(pin)];
285 u32 reg;
286
287 switch (param) {
288 case LTQ_PINCONF_PARAM_DRIVE_CURRENT:
289 reg = LTQ_PADC_DCC;
290 break;
291
292 case LTQ_PINCONF_PARAM_SLEW_RATE:
293 reg = LTQ_PADC_SRC;
294 break;
295
296 case LTQ_PINCONF_PARAM_PULL:
297 if (arg == 1)
298 reg = LTQ_PADC_PDEN;
299 else
300 reg = LTQ_PADC_PUEN;
301 break;
302
303 default:
304 pr_err("%s: Invalid config param %04x\n",
305 pinctrl_dev_get_name(pctrldev), param);
306 return -ENOTSUPP;
307 }
308
309 pad_w32(mem, BIT(PORT_PIN(pin)), reg);
310 if (!(pad_r32(mem, reg) & BIT(PORT_PIN(pin))))
311 return -ENOTSUPP;
312 return 0;
313}
314
315static void falcon_pinconf_dbg_show(struct pinctrl_dev *pctrldev,
316 struct seq_file *s, unsigned offset)
317{
318}
319
320static void falcon_pinconf_group_dbg_show(struct pinctrl_dev *pctrldev,
321 struct seq_file *s, unsigned selector)
322{
323}
324
325struct pinconf_ops falcon_pinconf_ops = {
326 .pin_config_get = falcon_pinconf_get,
327 .pin_config_set = falcon_pinconf_set,
328 .pin_config_group_get = falcon_pinconf_group_get,
329 .pin_config_group_set = falcon_pinconf_group_set,
330 .pin_config_dbg_show = falcon_pinconf_dbg_show,
331 .pin_config_group_dbg_show = falcon_pinconf_group_dbg_show,
332};
333
334static struct pinctrl_desc falcon_pctrl_desc = {
335 .owner = THIS_MODULE,
336 .pins = falcon_pads,
337 .confops = &falcon_pinconf_ops,
338};
339
340static inline int falcon_mux_apply(struct pinctrl_dev *pctrldev,
341 int mfp, int mux)
342{
343 struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
344 int port = PORT(info->mfp[mfp].pin);
345
346 if ((port >= PORTS) || (!info->membase[port]))
347 return -ENODEV;
348
349 pad_w32(info->membase[port], mux,
350 LTQ_PADC_MUX(PORT_PIN(info->mfp[mfp].pin)));
351 return 0;
352}
353
354static const struct ltq_cfg_param falcon_cfg_params[] = {
355 {"lantiq,pull", LTQ_PINCONF_PARAM_PULL},
356 {"lantiq,drive-current", LTQ_PINCONF_PARAM_DRIVE_CURRENT},
357 {"lantiq,slew-rate", LTQ_PINCONF_PARAM_SLEW_RATE},
358};
359
360static struct ltq_pinmux_info falcon_info = {
361 .desc = &falcon_pctrl_desc,
362 .apply_mux = falcon_mux_apply,
363};
364
365
366
367
368/* --------- register the pinctrl layer --------- */
369
370int pinctrl_falcon_get_range_size(int id)
371{
372 u32 avail;
373
374 if ((id >= PORTS) || (!falcon_info.membase[id]))
375 return -EINVAL;
376
377 avail = pad_r32(falcon_info.membase[id], LTQ_PADC_AVAIL);
378
379 return fls(avail);
380}
381
382void pinctrl_falcon_add_gpio_range(struct pinctrl_gpio_range *range)
383{
384 pinctrl_add_gpio_range(falcon_info.pctrl, range);
385}
386
387static int pinctrl_falcon_probe(struct platform_device *pdev)
388{
389 struct device_node *np;
390 int pad_count = 0;
391 int ret = 0;
392
393 /* load and remap the pad resources of the different banks */
394 for_each_compatible_node(np, NULL, "lantiq,pad-falcon") {
395 struct platform_device *ppdev = of_find_device_by_node(np);
396 const __be32 *bank = of_get_property(np, "lantiq,bank", NULL);
397 struct resource res;
398 u32 avail;
399 int pins;
400
401 if (!ppdev) {
402 dev_err(&pdev->dev, "failed to find pad pdev\n");
403 continue;
404 }
405 if (!bank || *bank >= PORTS)
406 continue;
407 if (of_address_to_resource(np, 0, &res))
408 continue;
409 falcon_info.clk[*bank] = clk_get(&ppdev->dev, NULL);
410 if (IS_ERR(falcon_info.clk[*bank])) {
411 dev_err(&ppdev->dev, "failed to get clock\n");
412 return PTR_ERR(falcon_info.clk[*bank]);
413 }
414 falcon_info.membase[*bank] =
415 devm_request_and_ioremap(&pdev->dev, &res);
416 if (!falcon_info.membase[*bank]) {
417 dev_err(&pdev->dev,
418 "Failed to remap memory for bank %d\n",
419 *bank);
420 return -ENOMEM;
421 }
422 avail = pad_r32(falcon_info.membase[*bank],
423 LTQ_PADC_AVAIL);
424 pins = fls(avail);
425 lantiq_load_pin_desc(&falcon_pads[pad_count], *bank, pins);
426 pad_count += pins;
427 clk_enable(falcon_info.clk[*bank]);
428 dev_dbg(&pdev->dev, "found %s with %d pads\n",
429 res.name, pins);
430 }
431 dev_dbg(&pdev->dev, "found a total of %d pads\n", pad_count);
432 falcon_pctrl_desc.name = dev_name(&pdev->dev);
433 falcon_pctrl_desc.npins = pad_count;
434
435 falcon_info.mfp = falcon_mfp;
436 falcon_info.num_mfp = ARRAY_SIZE(falcon_mfp);
437 falcon_info.grps = falcon_grps;
438 falcon_info.num_grps = ARRAY_SIZE(falcon_grps);
439 falcon_info.funcs = falcon_funcs;
440 falcon_info.num_funcs = ARRAY_SIZE(falcon_funcs);
441
442 ret = ltq_pinctrl_register(pdev, &falcon_info);
443 if (!ret)
444 dev_info(&pdev->dev, "Init done\n");
445 return ret;
446}
447
448static const struct of_device_id falcon_match[] = {
449 { .compatible = "lantiq,pinctrl-falcon" },
450 {},
451};
452MODULE_DEVICE_TABLE(of, falcon_match);
453
454static struct platform_driver pinctrl_falcon_driver = {
455 .probe = pinctrl_falcon_probe,
456 .driver = {
457 .name = "pinctrl-falcon",
458 .owner = THIS_MODULE,
459 .of_match_table = falcon_match,
460 },
461};
462
463int __init pinctrl_falcon_init(void)
464{
465 return platform_driver_register(&pinctrl_falcon_driver);
466}
467
468core_initcall_sync(pinctrl_falcon_init);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-25 23:19:39 -0500