1 /*
2 * Pinctrl driver for the Toumaz Xenif TZ1090 SoC
3 *
4 * Copyright (c) 2013, Imagination Technologies Ltd.
5 *
6 * Derived from Tegra code:
7 * Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved.
8 *
9 * Derived from code:
10 * Copyright (C) 2010 Google, Inc.
11 * Copyright (C) 2010 NVIDIA Corporation
12 * Copyright (C) 2009-2011 ST-Ericsson AB
13 *
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms and conditions of the GNU General Public License,
16 * version 2, as published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope it will be useful, but WITHOUT
19 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
20 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
21 * more details.
22 */
23
24 #include <linux/bitops.h>
25 #include <linux/io.h>
26 #include <linux/module.h>
27 #include <linux/of.h>
28 #include <linux/platform_device.h>
29 #include <linux/pinctrl/machine.h>
30 #include <linux/pinctrl/pinconf-generic.h>
31 #include <linux/pinctrl/pinctrl.h>
32 #include <linux/pinctrl/pinmux.h>
33 #include <linux/slab.h>
34 #include <linux/spinlock.h>
35
36 /*
37 * The registers may be shared with other threads/cores, so we need to use the
38 * metag global lock2 for atomicity.
39 */
40 #include <asm/global_lock.h>
41
42 #include "core.h"
43 #include "pinconf.h"
44
45 /* Register offsets from bank base address */
46 #define REG_PINCTRL_SELECT 0x10
47 #define REG_PINCTRL_SCHMITT 0x90
48 #define REG_PINCTRL_PU_PD 0xa0
49 #define REG_PINCTRL_SR 0xc0
50 #define REG_PINCTRL_DR 0xd0
51 #define REG_PINCTRL_IF_CTL 0xe0
52
53 /* REG_PINCTRL_PU_PD field values */
54 #define REG_PU_PD_TRISTATE 0
55 #define REG_PU_PD_UP 1
56 #define REG_PU_PD_DOWN 2
57 #define REG_PU_PD_REPEATER 3
58
59 /* REG_PINCTRL_DR field values */
60 #define REG_DR_2mA 0
61 #define REG_DR_4mA 1
62 #define REG_DR_8mA 2
63 #define REG_DR_12mA 3
64
65 /**
66 * struct tz1090_function - TZ1090 pinctrl mux function
67 * @name: The name of the function, exported to pinctrl core.
68 * @groups: An array of pin groups that may select this function.
69 * @ngroups: The number of entries in @groups.
70 */
71 struct tz1090_function {
72 const char *name;
73 const char * const *groups;
74 unsigned int ngroups;
75 };
76
77 /**
78 * struct tz1090_muxdesc - TZ1090 individual mux description
79 * @funcs: Function for each mux value.
80 * @reg: Mux register offset. 0 if unsupported.
81 * @bit: Mux register bit. 0 if unsupported.
82 * @width: Mux field width. 0 if unsupported.
83 *
84 * A representation of a group of signals (possibly just one signal) in the
85 * TZ1090 which can be muxed to a set of functions or sub muxes.
86 */
87 struct tz1090_muxdesc {
88 int funcs[5];
89 u16 reg;
90 u8 bit;
91 u8 width;
92 };
93
94 /**
95 * struct tz1090_pingroup - TZ1090 pin group
96 * @name: Name of pin group.
97 * @pins: Array of pin numbers in this pin group.
98 * @npins: Number of pins in this pin group.
99 * @mux: Top level mux.
100 * @drv: Drive control supported, 0 if unsupported.
101 * This means Schmitt, Slew, and Drive strength.
102 * @slw_bit: Slew register bit. 0 if unsupported.
103 * The same bit is used for Schmitt, and Drive (*2).
104 * @func: Currently muxed function.
105 * @func_count: Number of pins using current mux function.
106 *
107 * A representation of a group of pins (possibly just one pin) in the TZ1090
108 * pin controller. Each group allows some parameter or parameters to be
109 * configured. The most common is mux function selection.
110 */
111 struct tz1090_pingroup {
112 const char *name;
113 const unsigned int *pins;
114 unsigned int npins;
115 struct tz1090_muxdesc mux;
116
117 bool drv;
118 u8 slw_bit;
119
120 int func;
121 unsigned int func_count;
122 };
123
124 /*
125 * Most pins affected by the pinmux can also be GPIOs. Define these first.
126 * These must match how the GPIO driver names/numbers its pins.
127 */
128
129 enum tz1090_pin {
130 /* GPIO pins */
131 TZ1090_PIN_SDIO_CLK,
132 TZ1090_PIN_SDIO_CMD,
133 TZ1090_PIN_SDIO_D0,
134 TZ1090_PIN_SDIO_D1,
135 TZ1090_PIN_SDIO_D2,
136 TZ1090_PIN_SDIO_D3,
137 TZ1090_PIN_SDH_CD,
138 TZ1090_PIN_SDH_WP,
139 TZ1090_PIN_SPI0_MCLK,
140 TZ1090_PIN_SPI0_CS0,
141 TZ1090_PIN_SPI0_CS1,
142 TZ1090_PIN_SPI0_CS2,
143 TZ1090_PIN_SPI0_DOUT,
144 TZ1090_PIN_SPI0_DIN,
145 TZ1090_PIN_SPI1_MCLK,
146 TZ1090_PIN_SPI1_CS0,
147 TZ1090_PIN_SPI1_CS1,
148 TZ1090_PIN_SPI1_CS2,
149 TZ1090_PIN_SPI1_DOUT,
150 TZ1090_PIN_SPI1_DIN,
151 TZ1090_PIN_UART0_RXD,
152 TZ1090_PIN_UART0_TXD,
153 TZ1090_PIN_UART0_CTS,
154 TZ1090_PIN_UART0_RTS,
155 TZ1090_PIN_UART1_RXD,
156 TZ1090_PIN_UART1_TXD,
157 TZ1090_PIN_SCB0_SDAT,
158 TZ1090_PIN_SCB0_SCLK,
159 TZ1090_PIN_SCB1_SDAT,
160 TZ1090_PIN_SCB1_SCLK,
161 TZ1090_PIN_SCB2_SDAT,
162 TZ1090_PIN_SCB2_SCLK,
163 TZ1090_PIN_I2S_MCLK,
164 TZ1090_PIN_I2S_BCLK_OUT,
165 TZ1090_PIN_I2S_LRCLK_OUT,
166 TZ1090_PIN_I2S_DOUT0,
167 TZ1090_PIN_I2S_DOUT1,
168 TZ1090_PIN_I2S_DOUT2,
169 TZ1090_PIN_I2S_DIN,
170 TZ1090_PIN_PDM_A,
171 TZ1090_PIN_PDM_B,
172 TZ1090_PIN_PDM_C,
173 TZ1090_PIN_PDM_D,
174 TZ1090_PIN_TFT_RED0,
175 TZ1090_PIN_TFT_RED1,
176 TZ1090_PIN_TFT_RED2,
177 TZ1090_PIN_TFT_RED3,
178 TZ1090_PIN_TFT_RED4,
179 TZ1090_PIN_TFT_RED5,
180 TZ1090_PIN_TFT_RED6,
181 TZ1090_PIN_TFT_RED7,
182 TZ1090_PIN_TFT_GREEN0,
183 TZ1090_PIN_TFT_GREEN1,
184 TZ1090_PIN_TFT_GREEN2,
185 TZ1090_PIN_TFT_GREEN3,
186 TZ1090_PIN_TFT_GREEN4,
187 TZ1090_PIN_TFT_GREEN5,
188 TZ1090_PIN_TFT_GREEN6,
189 TZ1090_PIN_TFT_GREEN7,
190 TZ1090_PIN_TFT_BLUE0,
191 TZ1090_PIN_TFT_BLUE1,
192 TZ1090_PIN_TFT_BLUE2,
193 TZ1090_PIN_TFT_BLUE3,
194 TZ1090_PIN_TFT_BLUE4,
195 TZ1090_PIN_TFT_BLUE5,
196 TZ1090_PIN_TFT_BLUE6,
197 TZ1090_PIN_TFT_BLUE7,
198 TZ1090_PIN_TFT_VDDEN_GD,
199 TZ1090_PIN_TFT_PANELCLK,
200 TZ1090_PIN_TFT_BLANK_LS,
201 TZ1090_PIN_TFT_VSYNC_NS,
202 TZ1090_PIN_TFT_HSYNC_NR,
203 TZ1090_PIN_TFT_VD12ACB,
204 TZ1090_PIN_TFT_PWRSAVE,
205 TZ1090_PIN_TX_ON,
206 TZ1090_PIN_RX_ON,
207 TZ1090_PIN_PLL_ON,
208 TZ1090_PIN_PA_ON,
209 TZ1090_PIN_RX_HP,
210 TZ1090_PIN_GAIN0,
211 TZ1090_PIN_GAIN1,
212 TZ1090_PIN_GAIN2,
213 TZ1090_PIN_GAIN3,
214 TZ1090_PIN_GAIN4,
215 TZ1090_PIN_GAIN5,
216 TZ1090_PIN_GAIN6,
217 TZ1090_PIN_GAIN7,
218 TZ1090_PIN_ANT_SEL0,
219 TZ1090_PIN_ANT_SEL1,
220 TZ1090_PIN_SDH_CLK_IN,
221
222 /* Non-GPIO pins */
223 TZ1090_PIN_TCK,
224 TZ1090_PIN_TRST,
225 TZ1090_PIN_TDI,
226 TZ1090_PIN_TDO,
227 TZ1090_PIN_TMS,
228 TZ1090_PIN_CLK_OUT0,
229 TZ1090_PIN_CLK_OUT1,
230
231 NUM_GPIOS = TZ1090_PIN_TCK,
232 };
233
234 /* Pin names */
235
236 static const struct pinctrl_pin_desc tz1090_pins[] = {
237 /* GPIO pins */
238 PINCTRL_PIN(TZ1090_PIN_SDIO_CLK, "sdio_clk"),
239 PINCTRL_PIN(TZ1090_PIN_SDIO_CMD, "sdio_cmd"),
240 PINCTRL_PIN(TZ1090_PIN_SDIO_D0, "sdio_d0"),
241 PINCTRL_PIN(TZ1090_PIN_SDIO_D1, "sdio_d1"),
242 PINCTRL_PIN(TZ1090_PIN_SDIO_D2, "sdio_d2"),
243 PINCTRL_PIN(TZ1090_PIN_SDIO_D3, "sdio_d3"),
244 PINCTRL_PIN(TZ1090_PIN_SDH_CD, "sdh_cd"),
245 PINCTRL_PIN(TZ1090_PIN_SDH_WP, "sdh_wp"),
246 PINCTRL_PIN(TZ1090_PIN_SPI0_MCLK, "spi0_mclk"),
247 PINCTRL_PIN(TZ1090_PIN_SPI0_CS0, "spi0_cs0"),
248 PINCTRL_PIN(TZ1090_PIN_SPI0_CS1, "spi0_cs1"),
249 PINCTRL_PIN(TZ1090_PIN_SPI0_CS2, "spi0_cs2"),
250 PINCTRL_PIN(TZ1090_PIN_SPI0_DOUT, "spi0_dout"),
251 PINCTRL_PIN(TZ1090_PIN_SPI0_DIN, "spi0_din"),
252 PINCTRL_PIN(TZ1090_PIN_SPI1_MCLK, "spi1_mclk"),
253 PINCTRL_PIN(TZ1090_PIN_SPI1_CS0, "spi1_cs0"),
254 PINCTRL_PIN(TZ1090_PIN_SPI1_CS1, "spi1_cs1"),
255 PINCTRL_PIN(TZ1090_PIN_SPI1_CS2, "spi1_cs2"),
256 PINCTRL_PIN(TZ1090_PIN_SPI1_DOUT, "spi1_dout"),
257 PINCTRL_PIN(TZ1090_PIN_SPI1_DIN, "spi1_din"),
258 PINCTRL_PIN(TZ1090_PIN_UART0_RXD, "uart0_rxd"),
259 PINCTRL_PIN(TZ1090_PIN_UART0_TXD, "uart0_txd"),
260 PINCTRL_PIN(TZ1090_PIN_UART0_CTS, "uart0_cts"),
261 PINCTRL_PIN(TZ1090_PIN_UART0_RTS, "uart0_rts"),
262 PINCTRL_PIN(TZ1090_PIN_UART1_RXD, "uart1_rxd"),
263 PINCTRL_PIN(TZ1090_PIN_UART1_TXD, "uart1_txd"),
264 PINCTRL_PIN(TZ1090_PIN_SCB0_SDAT, "scb0_sdat"),
265 PINCTRL_PIN(TZ1090_PIN_SCB0_SCLK, "scb0_sclk"),
266 PINCTRL_PIN(TZ1090_PIN_SCB1_SDAT, "scb1_sdat"),
267 PINCTRL_PIN(TZ1090_PIN_SCB1_SCLK, "scb1_sclk"),
268 PINCTRL_PIN(TZ1090_PIN_SCB2_SDAT, "scb2_sdat"),
269 PINCTRL_PIN(TZ1090_PIN_SCB2_SCLK, "scb2_sclk"),
270 PINCTRL_PIN(TZ1090_PIN_I2S_MCLK, "i2s_mclk"),
271 PINCTRL_PIN(TZ1090_PIN_I2S_BCLK_OUT, "i2s_bclk_out"),
272 PINCTRL_PIN(TZ1090_PIN_I2S_LRCLK_OUT, "i2s_lrclk_out"),
273 PINCTRL_PIN(TZ1090_PIN_I2S_DOUT0, "i2s_dout0"),
274 PINCTRL_PIN(TZ1090_PIN_I2S_DOUT1, "i2s_dout1"),
275 PINCTRL_PIN(TZ1090_PIN_I2S_DOUT2, "i2s_dout2"),
276 PINCTRL_PIN(TZ1090_PIN_I2S_DIN, "i2s_din"),
277 PINCTRL_PIN(TZ1090_PIN_PDM_A, "pdm_a"),
278 PINCTRL_PIN(TZ1090_PIN_PDM_B, "pdm_b"),
279 PINCTRL_PIN(TZ1090_PIN_PDM_C, "pdm_c"),
280 PINCTRL_PIN(TZ1090_PIN_PDM_D, "pdm_d"),
281 PINCTRL_PIN(TZ1090_PIN_TFT_RED0, "tft_red0"),
282 PINCTRL_PIN(TZ1090_PIN_TFT_RED1, "tft_red1"),
283 PINCTRL_PIN(TZ1090_PIN_TFT_RED2, "tft_red2"),
284 PINCTRL_PIN(TZ1090_PIN_TFT_RED3, "tft_red3"),
285 PINCTRL_PIN(TZ1090_PIN_TFT_RED4, "tft_red4"),
286 PINCTRL_PIN(TZ1090_PIN_TFT_RED5, "tft_red5"),
287 PINCTRL_PIN(TZ1090_PIN_TFT_RED6, "tft_red6"),
288 PINCTRL_PIN(TZ1090_PIN_TFT_RED7, "tft_red7"),
289 PINCTRL_PIN(TZ1090_PIN_TFT_GREEN0, "tft_green0"),
290 PINCTRL_PIN(TZ1090_PIN_TFT_GREEN1, "tft_green1"),
291 PINCTRL_PIN(TZ1090_PIN_TFT_GREEN2, "tft_green2"),
292 PINCTRL_PIN(TZ1090_PIN_TFT_GREEN3, "tft_green3"),
293 PINCTRL_PIN(TZ1090_PIN_TFT_GREEN4, "tft_green4"),
294 PINCTRL_PIN(TZ1090_PIN_TFT_GREEN5, "tft_green5"),
295 PINCTRL_PIN(TZ1090_PIN_TFT_GREEN6, "tft_green6"),
296 PINCTRL_PIN(TZ1090_PIN_TFT_GREEN7, "tft_green7"),
297 PINCTRL_PIN(TZ1090_PIN_TFT_BLUE0, "tft_blue0"),
298 PINCTRL_PIN(TZ1090_PIN_TFT_BLUE1, "tft_blue1"),
299 PINCTRL_PIN(TZ1090_PIN_TFT_BLUE2, "tft_blue2"),
300 PINCTRL_PIN(TZ1090_PIN_TFT_BLUE3, "tft_blue3"),
301 PINCTRL_PIN(TZ1090_PIN_TFT_BLUE4, "tft_blue4"),
302 PINCTRL_PIN(TZ1090_PIN_TFT_BLUE5, "tft_blue5"),
303 PINCTRL_PIN(TZ1090_PIN_TFT_BLUE6, "tft_blue6"),
304 PINCTRL_PIN(TZ1090_PIN_TFT_BLUE7, "tft_blue7"),
305 PINCTRL_PIN(TZ1090_PIN_TFT_VDDEN_GD, "tft_vdden_gd"),
306 PINCTRL_PIN(TZ1090_PIN_TFT_PANELCLK, "tft_panelclk"),
307 PINCTRL_PIN(TZ1090_PIN_TFT_BLANK_LS, "tft_blank_ls"),
308 PINCTRL_PIN(TZ1090_PIN_TFT_VSYNC_NS, "tft_vsync_ns"),
309 PINCTRL_PIN(TZ1090_PIN_TFT_HSYNC_NR, "tft_hsync_nr"),
310 PINCTRL_PIN(TZ1090_PIN_TFT_VD12ACB, "tft_vd12acb"),
311 PINCTRL_PIN(TZ1090_PIN_TFT_PWRSAVE, "tft_pwrsave"),
312 PINCTRL_PIN(TZ1090_PIN_TX_ON, "tx_on"),
313 PINCTRL_PIN(TZ1090_PIN_RX_ON, "rx_on"),
314 PINCTRL_PIN(TZ1090_PIN_PLL_ON, "pll_on"),
315 PINCTRL_PIN(TZ1090_PIN_PA_ON, "pa_on"),
316 PINCTRL_PIN(TZ1090_PIN_RX_HP, "rx_hp"),
317 PINCTRL_PIN(TZ1090_PIN_GAIN0, "gain0"),
318 PINCTRL_PIN(TZ1090_PIN_GAIN1, "gain1"),
319 PINCTRL_PIN(TZ1090_PIN_GAIN2, "gain2"),
320 PINCTRL_PIN(TZ1090_PIN_GAIN3, "gain3"),
321 PINCTRL_PIN(TZ1090_PIN_GAIN4, "gain4"),
322 PINCTRL_PIN(TZ1090_PIN_GAIN5, "gain5"),
323 PINCTRL_PIN(TZ1090_PIN_GAIN6, "gain6"),
324 PINCTRL_PIN(TZ1090_PIN_GAIN7, "gain7"),
325 PINCTRL_PIN(TZ1090_PIN_ANT_SEL0, "ant_sel0"),
326 PINCTRL_PIN(TZ1090_PIN_ANT_SEL1, "ant_sel1"),
327 PINCTRL_PIN(TZ1090_PIN_SDH_CLK_IN, "sdh_clk_in"),
328
329 /* Non-GPIO pins */
330 PINCTRL_PIN(TZ1090_PIN_TCK, "tck"),
331 PINCTRL_PIN(TZ1090_PIN_TRST, "trst"),
332 PINCTRL_PIN(TZ1090_PIN_TDI, "tdi"),
333 PINCTRL_PIN(TZ1090_PIN_TDO, "tdo"),
334 PINCTRL_PIN(TZ1090_PIN_TMS, "tms"),
335 PINCTRL_PIN(TZ1090_PIN_CLK_OUT0, "clk_out0"),
336 PINCTRL_PIN(TZ1090_PIN_CLK_OUT1, "clk_out1"),
337 };
338
339 /* Pins in each pin group */
340
341 static const unsigned int spi1_cs2_pins[] = {
342 TZ1090_PIN_SPI1_CS2,
343 };
344
345 static const unsigned int pdm_d_pins[] = {
346 TZ1090_PIN_PDM_D,
347 };
348
349 static const unsigned int tft_pins[] = {
350 TZ1090_PIN_TFT_RED0,
351 TZ1090_PIN_TFT_RED1,
352 TZ1090_PIN_TFT_RED2,
353 TZ1090_PIN_TFT_RED3,
354 TZ1090_PIN_TFT_RED4,
355 TZ1090_PIN_TFT_RED5,
356 TZ1090_PIN_TFT_RED6,
357 TZ1090_PIN_TFT_RED7,
358 TZ1090_PIN_TFT_GREEN0,
359 TZ1090_PIN_TFT_GREEN1,
360 TZ1090_PIN_TFT_GREEN2,
361 TZ1090_PIN_TFT_GREEN3,
362 TZ1090_PIN_TFT_GREEN4,
363 TZ1090_PIN_TFT_GREEN5,
364 TZ1090_PIN_TFT_GREEN6,
365 TZ1090_PIN_TFT_GREEN7,
366 TZ1090_PIN_TFT_BLUE0,
367 TZ1090_PIN_TFT_BLUE1,
368 TZ1090_PIN_TFT_BLUE2,
369 TZ1090_PIN_TFT_BLUE3,
370 TZ1090_PIN_TFT_BLUE4,
371 TZ1090_PIN_TFT_BLUE5,
372 TZ1090_PIN_TFT_BLUE6,
373 TZ1090_PIN_TFT_BLUE7,
374 TZ1090_PIN_TFT_VDDEN_GD,
375 TZ1090_PIN_TFT_PANELCLK,
376 TZ1090_PIN_TFT_BLANK_LS,
377 TZ1090_PIN_TFT_VSYNC_NS,
378 TZ1090_PIN_TFT_HSYNC_NR,
379 TZ1090_PIN_TFT_VD12ACB,
380 TZ1090_PIN_TFT_PWRSAVE,
381 };
382
383 static const unsigned int afe_pins[] = {
384 TZ1090_PIN_TX_ON,
385 TZ1090_PIN_RX_ON,
386 TZ1090_PIN_PLL_ON,
387 TZ1090_PIN_PA_ON,
388 TZ1090_PIN_RX_HP,
389 TZ1090_PIN_ANT_SEL0,
390 TZ1090_PIN_ANT_SEL1,
391 TZ1090_PIN_GAIN0,
392 TZ1090_PIN_GAIN1,
393 TZ1090_PIN_GAIN2,
394 TZ1090_PIN_GAIN3,
395 TZ1090_PIN_GAIN4,
396 TZ1090_PIN_GAIN5,
397 TZ1090_PIN_GAIN6,
398 TZ1090_PIN_GAIN7,
399 };
400
401 static const unsigned int sdio_pins[] = {
402 TZ1090_PIN_SDIO_CLK,
403 TZ1090_PIN_SDIO_CMD,
404 TZ1090_PIN_SDIO_D0,
405 TZ1090_PIN_SDIO_D1,
406 TZ1090_PIN_SDIO_D2,
407 TZ1090_PIN_SDIO_D3,
408 };
409
410 static const unsigned int sdh_pins[] = {
411 TZ1090_PIN_SDH_CD,
412 TZ1090_PIN_SDH_WP,
413 TZ1090_PIN_SDH_CLK_IN,
414 };
415
416 static const unsigned int spi0_pins[] = {
417 TZ1090_PIN_SPI0_MCLK,
418 TZ1090_PIN_SPI0_CS0,
419 TZ1090_PIN_SPI0_CS1,
420 TZ1090_PIN_SPI0_CS2,
421 TZ1090_PIN_SPI0_DOUT,
422 TZ1090_PIN_SPI0_DIN,
423 };
424
425 static const unsigned int spi1_pins[] = {
426 TZ1090_PIN_SPI1_MCLK,
427 TZ1090_PIN_SPI1_CS0,
428 TZ1090_PIN_SPI1_CS1,
429 TZ1090_PIN_SPI1_CS2,
430 TZ1090_PIN_SPI1_DOUT,
431 TZ1090_PIN_SPI1_DIN,
432 };
433
434 static const unsigned int uart0_pins[] = {
435 TZ1090_PIN_UART0_RTS,
436 TZ1090_PIN_UART0_CTS,
437 TZ1090_PIN_UART0_TXD,
438 TZ1090_PIN_UART0_RXD,
439 };
440
441 static const unsigned int uart1_pins[] = {
442 TZ1090_PIN_UART1_TXD,
443 TZ1090_PIN_UART1_RXD,
444 };
445
446 static const unsigned int uart_pins[] = {
447 TZ1090_PIN_UART1_TXD,
448 TZ1090_PIN_UART1_RXD,
449 TZ1090_PIN_UART0_RTS,
450 TZ1090_PIN_UART0_CTS,
451 TZ1090_PIN_UART0_TXD,
452 TZ1090_PIN_UART0_RXD,
453 };
454
455 static const unsigned int scb0_pins[] = {
456 TZ1090_PIN_SCB0_SDAT,
457 TZ1090_PIN_SCB0_SCLK,
458 };
459
460 static const unsigned int scb1_pins[] = {
461 TZ1090_PIN_SCB1_SDAT,
462 TZ1090_PIN_SCB1_SCLK,
463 };
464
465 static const unsigned int scb2_pins[] = {
466 TZ1090_PIN_SCB2_SDAT,
467 TZ1090_PIN_SCB2_SCLK,
468 };
469
470 static const unsigned int i2s_pins[] = {
471 TZ1090_PIN_I2S_MCLK,
472 TZ1090_PIN_I2S_BCLK_OUT,
473 TZ1090_PIN_I2S_LRCLK_OUT,
474 TZ1090_PIN_I2S_DOUT0,
475 TZ1090_PIN_I2S_DOUT1,
476 TZ1090_PIN_I2S_DOUT2,
477 TZ1090_PIN_I2S_DIN,
478 };
479
480 static const unsigned int jtag_pins[] = {
481 TZ1090_PIN_TCK,
482 TZ1090_PIN_TRST,
483 TZ1090_PIN_TDI,
484 TZ1090_PIN_TDO,
485 TZ1090_PIN_TMS,
486 };
487
488 /* Pins in each drive pin group */
489
490 static const unsigned int drive_sdio_pins[] = {
491 TZ1090_PIN_SDIO_CLK,
492 TZ1090_PIN_SDIO_CMD,
493 TZ1090_PIN_SDIO_D0,
494 TZ1090_PIN_SDIO_D1,
495 TZ1090_PIN_SDIO_D2,
496 TZ1090_PIN_SDIO_D3,
497 TZ1090_PIN_SDH_WP,
498 TZ1090_PIN_SDH_CD,
499 TZ1090_PIN_SDH_CLK_IN,
500 };
501
502 static const unsigned int drive_i2s_pins[] = {
503 TZ1090_PIN_CLK_OUT1,
504 TZ1090_PIN_I2S_DIN,
505 TZ1090_PIN_I2S_DOUT0,
506 TZ1090_PIN_I2S_DOUT1,
507 TZ1090_PIN_I2S_DOUT2,
508 TZ1090_PIN_I2S_LRCLK_OUT,
509 TZ1090_PIN_I2S_BCLK_OUT,
510 TZ1090_PIN_I2S_MCLK,
511 };
512
513 static const unsigned int drive_scb0_pins[] = {
514 TZ1090_PIN_SCB0_SCLK,
515 TZ1090_PIN_SCB0_SDAT,
516 TZ1090_PIN_PDM_D,
517 TZ1090_PIN_PDM_C,
518 };
519
520 static const unsigned int drive_pdm_pins[] = {
521 TZ1090_PIN_CLK_OUT0,
522 TZ1090_PIN_PDM_B,
523 TZ1090_PIN_PDM_A,
524 };
525
526 /* Pin groups each function can be muxed to */
527
528 /*
529 * The magic "perip" function allows otherwise non-muxing pins to be enabled in
530 * peripheral mode.
531 */
532 static const char * const perip_groups[] = {
533 /* non-muxing convenient gpio pingroups */
534 "uart",
535 "uart0",
536 "uart1",
537 "spi0",
538 "spi1",
539 "scb0",
540 "scb1",
541 "scb2",
542 "i2s",
543 /* individual pins not part of a pin mux group */
544 "spi0_mclk",
545 "spi0_cs0",
546 "spi0_cs1",
547 "spi0_cs2",
548 "spi0_dout",
549 "spi0_din",
550 "spi1_mclk",
551 "spi1_cs0",
552 "spi1_cs1",
553 "spi1_dout",
554 "spi1_din",
555 "uart0_rxd",
556 "uart0_txd",
557 "uart0_cts",
558 "uart0_rts",
559 "uart1_rxd",
560 "uart1_txd",
561 "scb0_sdat",
562 "scb0_sclk",
563 "scb1_sdat",
564 "scb1_sclk",
565 "scb2_sdat",
566 "scb2_sclk",
567 "i2s_mclk",
568 "i2s_bclk_out",
569 "i2s_lrclk_out",
570 "i2s_dout0",
571 "i2s_dout1",
572 "i2s_dout2",
573 "i2s_din",
574 "pdm_a",
575 "pdm_b",
576 "pdm_c",
577 };
578
579 static const char * const sdh_sdio_groups[] = {
580 "sdh",
581 "sdio",
582 /* sdh pins */
583 "sdh_cd",
584 "sdh_wp",
585 "sdh_clk_in",
586 /* sdio pins */
587 "sdio_clk",
588 "sdio_cmd",
589 "sdio_d0",
590 "sdio_d1",
591 "sdio_d2",
592 "sdio_d3",
593 };
594
595 static const char * const spi1_cs2_groups[] = {
596 "spi1_cs2",
597 };
598
599 static const char * const pdm_dac_groups[] = {
600 "pdm_d",
601 };
602
603 static const char * const usb_vbus_groups[] = {
604 "spi1_cs2",
605 "pdm_d",
606 };
607
608 static const char * const afe_groups[] = {
609 "afe",
610 /* afe pins */
611 "tx_on",
612 "rx_on",
613 "pll_on",
614 "pa_on",
615 "rx_hp",
616 "ant_sel0",
617 "ant_sel1",
618 "gain0",
619 "gain1",
620 "gain2",
621 "gain3",
622 "gain4",
623 "gain5",
624 "gain6",
625 "gain7",
626 };
627
628 static const char * const tft_groups[] = {
629 "tft",
630 /* tft pins */
631 "tft_red0",
632 "tft_red1",
633 "tft_red2",
634 "tft_red3",
635 "tft_red4",
636 "tft_red5",
637 "tft_red6",
638 "tft_red7",
639 "tft_green0",
640 "tft_green1",
641 "tft_green2",
642 "tft_green3",
643 "tft_green4",
644 "tft_green5",
645 "tft_green6",
646 "tft_green7",
647 "tft_blue0",
648 "tft_blue1",
649 "tft_blue2",
650 "tft_blue3",
651 "tft_blue4",
652 "tft_blue5",
653 "tft_blue6",
654 "tft_blue7",
655 "tft_vdden_gd",
656 "tft_panelclk",
657 "tft_blank_ls",
658 "tft_vsync_ns",
659 "tft_hsync_nr",
660 "tft_vd12acb",
661 "tft_pwrsave",
662 };
663
664 /* Mux functions that can be used by a mux */
665
666 enum tz1090_mux {
667 /* internal placeholder */
668 TZ1090_MUX_NA = -1,
669 /* magic per-non-muxing-GPIO-pin peripheral mode mux */
670 TZ1090_MUX_PERIP,
671 /* SDH/SDIO mux */
672 TZ1090_MUX_SDH,
673 TZ1090_MUX_SDIO,
674 /* USB_VBUS muxes */
675 TZ1090_MUX_SPI1_CS2,
676 TZ1090_MUX_PDM_DAC,
677 TZ1090_MUX_USB_VBUS,
678 /* AFE mux */
679 TZ1090_MUX_AFE,
680 TZ1090_MUX_TS_OUT_0,
681 /* EXT_DAC mux */
682 TZ1090_MUX_DAC,
683 TZ1090_MUX_NOT_IQADC_STB,
684 TZ1090_MUX_IQDAC_STB,
685 /* TFT mux */
686 TZ1090_MUX_TFT,
687 TZ1090_MUX_EXT_DAC,
688 TZ1090_MUX_TS_OUT_1,
689 TZ1090_MUX_LCD_TRACE,
690 TZ1090_MUX_PHY_RINGOSC,
691 };
692
693 #define FUNCTION(mux, fname, group) \
694 [(TZ1090_MUX_ ## mux)] = { \
695 .name = #fname, \
696 .groups = group##_groups, \
697 .ngroups = ARRAY_SIZE(group##_groups), \
698 }
699 /* For intermediate functions with submuxes */
700 #define NULL_FUNCTION(mux, fname) \
701 [(TZ1090_MUX_ ## mux)] = { \
702 .name = #fname, \
703 }
704
705 /* Must correlate with enum tz1090_mux */
706 static const struct tz1090_function tz1090_functions[] = {
707 /* FUNCTION function name pingroups */
708 FUNCTION(PERIP, perip, perip),
709 FUNCTION(SDH, sdh, sdh_sdio),
710 FUNCTION(SDIO, sdio, sdh_sdio),
711 FUNCTION(SPI1_CS2, spi1_cs2, spi1_cs2),
712 FUNCTION(PDM_DAC, pdm_dac, pdm_dac),
713 FUNCTION(USB_VBUS, usb_vbus, usb_vbus),
714 FUNCTION(AFE, afe, afe),
715 FUNCTION(TS_OUT_0, ts_out_0, afe),
716 FUNCTION(DAC, ext_dac, tft),
717 FUNCTION(NOT_IQADC_STB, not_iqadc_stb, tft),
718 FUNCTION(IQDAC_STB, iqdac_stb, tft),
719 FUNCTION(TFT, tft, tft),
720 NULL_FUNCTION(EXT_DAC, _ext_dac),
721 FUNCTION(TS_OUT_1, ts_out_1, tft),
722 FUNCTION(LCD_TRACE, lcd_trace, tft),
723 FUNCTION(PHY_RINGOSC, phy_ringosc, tft),
724 };
725
726 /* Sub muxes */
727
728 /**
729 * MUX() - Initialise a mux description.
730 * @f0: Function 0 (TZ1090_MUX_ is prepended, NA for none)
731 * @f1: Function 1 (TZ1090_MUX_ is prepended, NA for none)
732 * @f2: Function 2 (TZ1090_MUX_ is prepended, NA for none)
733 * @f3: Function 3 (TZ1090_MUX_ is prepended, NA for none)
734 * @f4: Function 4 (TZ1090_MUX_ is prepended, NA for none)
735 * @mux_r: Mux register (REG_PINCTRL_ is prepended)
736 * @mux_b: Bit number in register that the mux field begins
737 * @mux_w: Width of mux field in register
738 */
739 #define MUX(f0, f1, f2, f3, f4, mux_r, mux_b, mux_w) \
740 { \
741 .funcs = { \
742 TZ1090_MUX_ ## f0, \
743 TZ1090_MUX_ ## f1, \
744 TZ1090_MUX_ ## f2, \
745 TZ1090_MUX_ ## f3, \
746 TZ1090_MUX_ ## f4, \
747 }, \
748 .reg = (REG_PINCTRL_ ## mux_r), \
749 .bit = (mux_b), \
750 .width = (mux_w), \
751 }
752
753 /**
754 * DEFINE_SUBMUX() - Defines a submux description separate from a pin group.
755 * @mux: Mux name (_submux is appended)
756 * @f0: Function 0 (TZ1090_MUX_ is prepended, NA for none)
757 * @f1: Function 1 (TZ1090_MUX_ is prepended, NA for none)
758 * @f2: Function 2 (TZ1090_MUX_ is prepended, NA for none)
759 * @f3: Function 3 (TZ1090_MUX_ is prepended, NA for none)
760 * @f4: Function 4 (TZ1090_MUX_ is prepended, NA for none)
761 * @mux_r: Mux register (REG_PINCTRL_ is prepended)
762 * @mux_b: Bit number in register that the mux field begins
763 * @mux_w: Width of mux field in register
764 *
765 * A sub mux is a nested mux that can be bound to a magic function number used
766 * by another mux description. For example value 4 of the top level mux might
767 * correspond to a function which has a submux pointed to in tz1090_submux[].
768 * The outer mux can then take on any function in the top level mux or the
769 * submux, and if a submux function is chosen both muxes are updated to route
770 * the signal from the submux.
771 *
772 * The submux can be defined with DEFINE_SUBMUX and pointed to from
773 * tz1090_submux[] using SUBMUX.
774 */
775 #define DEFINE_SUBMUX(mux, f0, f1, f2, f3, f4, mux_r, mux_b, mux_w) \
776 static struct tz1090_muxdesc mux ## _submux = \
777 MUX(f0, f1, f2, f3, f4, mux_r, mux_b, mux_w)
778
779 /**
780 * SUBMUX() - Link a submux to a function number.
781 * @f: Function name (TZ1090_MUX_ is prepended)
782 * @submux: Submux name (_submux is appended)
783 *
784 * For use in tz1090_submux[] initialisation to link an intermediate function
785 * number to a particular submux description. It indicates that when the
786 * function is chosen the signal is connected to the submux.
787 */
788 #define SUBMUX(f, submux) [(TZ1090_MUX_ ## f)] = &(submux ## _submux)
789
790 /**
791 * MUX_PG() - Initialise a pin group with mux control
792 * @pg_name: Pin group name (stringified, _pins appended to get pins array)
793 * @f0: Function 0 (TZ1090_MUX_ is prepended, NA for none)
794 * @f1: Function 1 (TZ1090_MUX_ is prepended, NA for none)
795 * @f2: Function 2 (TZ1090_MUX_ is prepended, NA for none)
796 * @f3: Function 3 (TZ1090_MUX_ is prepended, NA for none)
797 * @f4: Function 4 (TZ1090_MUX_ is prepended, NA for none)
798 * @mux_r: Mux register (REG_PINCTRL_ is prepended)
799 * @mux_b: Bit number in register that the mux field begins
800 * @mux_w: Width of mux field in register
801 */
802 #define MUX_PG(pg_name, f0, f1, f2, f3, f4, \
803 mux_r, mux_b, mux_w) \
804 { \
805 .name = #pg_name, \
806 .pins = pg_name##_pins, \
807 .npins = ARRAY_SIZE(pg_name##_pins), \
808 .mux = MUX(f0, f1, f2, f3, f4, \
809 mux_r, mux_b, mux_w), \
810 }
811
812 /**
813 * SIMPLE_PG() - Initialise a simple convenience pin group
814 * @pg_name: Pin group name (stringified, _pins appended to get pins array)
815 *
816 * A simple pin group is simply used for binding pins together so they can be
817 * referred to by a single name instead of having to list every pin
818 * individually.
819 */
820 #define SIMPLE_PG(pg_name) \
821 { \
822 .name = #pg_name, \
823 .pins = pg_name##_pins, \
824 .npins = ARRAY_SIZE(pg_name##_pins), \
825 }
826
827 /**
828 * DRV_PG() - Initialise a pin group with drive control
829 * @pg_name: Pin group name (stringified, _pins appended to get pins array)
830 * @slw_b: Slew register bit.
831 * The same bit is used for Schmitt, and Drive (*2).
832 */
833 #define DRV_PG(pg_name, slw_b) \
834 { \
835 .name = #pg_name, \
836 .pins = pg_name##_pins, \
837 .npins = ARRAY_SIZE(pg_name##_pins), \
838 .drv = true, \
839 .slw_bit = (slw_b), \
840 }
841
842 /*
843 * Define main muxing pin groups
844 */
845
846 /* submuxes */
847
848 /* name f0, f1, f2, f3, f4, mux r/b/w */
849 DEFINE_SUBMUX(ext_dac, DAC, NOT_IQADC_STB, IQDAC_STB, NA, NA, IF_CTL, 6, 2);
850
851 /* bind submuxes to internal functions */
852 static struct tz1090_muxdesc *tz1090_submux[] = {
853 SUBMUX(EXT_DAC, ext_dac),
854 };
855
856 /*
857 * These are the pin mux groups. Pin muxing can be enabled and disabled for each
858 * pin individually so these groups are internal. The mapping of pins to pin mux
859 * group is below (tz1090_mux_pins).
860 */
861 static struct tz1090_pingroup tz1090_mux_groups[] = {
862 /* Muxing pin groups */
863 /* pg_name, f0, f1, f2, f3, f4, mux r/b/w */
864 MUX_PG(sdh, SDH, SDIO, NA, NA, NA, IF_CTL, 20, 2),
865 MUX_PG(sdio, SDIO, SDH, NA, NA, NA, IF_CTL, 16, 2),
866 MUX_PG(spi1_cs2, SPI1_CS2, USB_VBUS, NA, NA, NA, IF_CTL, 10, 2),
867 MUX_PG(pdm_d, PDM_DAC, USB_VBUS, NA, NA, NA, IF_CTL, 8, 2),
868 MUX_PG(afe, AFE, TS_OUT_0, NA, NA, NA, IF_CTL, 4, 2),
869 MUX_PG(tft, TFT, EXT_DAC, TS_OUT_1, LCD_TRACE, PHY_RINGOSC, IF_CTL, 0, 3),
870 };
871
872 /*
873 * This is the mapping from GPIO pins to pin mux groups in tz1090_mux_groups[].
874 * Pins which aren't muxable to multiple peripherals are set to
875 * TZ1090_MUX_GROUP_MAX to enable the "perip" function to enable/disable
876 * peripheral control of the pin.
877 *
878 * This array is initialised in tz1090_init_mux_pins().
879 */
880 static u8 tz1090_mux_pins[NUM_GPIOS];
881
882 /* TZ1090_MUX_GROUP_MAX is used in tz1090_mux_pins[] for non-muxing pins */
883 #define TZ1090_MUX_GROUP_MAX ARRAY_SIZE(tz1090_mux_groups)
884
885 /**
886 * tz1090_init_mux_pins() - Initialise GPIO pin to mux group mapping.
887 *
888 * Initialises the tz1090_mux_pins[] array to be the inverse of the pin lists in
889 * each pin mux group in tz1090_mux_groups[].
890 *
891 * It is assumed that no pin mux groups overlap (share pins).
892 */
tz1090_init_mux_pins(void)893 static void __init tz1090_init_mux_pins(void)
894 {
895 unsigned int g, p;
896 const struct tz1090_pingroup *grp;
897 const unsigned int *pin;
898
899 for (p = 0; p < NUM_GPIOS; ++p)
900 tz1090_mux_pins[p] = TZ1090_MUX_GROUP_MAX;
901
902 grp = tz1090_mux_groups;
903 for (g = 0, grp = tz1090_mux_groups;
904 g < ARRAY_SIZE(tz1090_mux_groups); ++g, ++grp)
905 for (pin = grp->pins, p = 0; p < grp->npins; ++p, ++pin)
906 tz1090_mux_pins[*pin] = g;
907 }
908
909 /*
910 * These are the externally visible pin groups. Some of them allow group control
911 * of drive configuration. Some are just simple convenience pingroups. All the
912 * internal pin mux groups in tz1090_mux_groups[] are mirrored here with the
913 * same pins.
914 * Pseudo pin groups follow in the group numbers after this array for each GPIO
915 * pin. Any group used for muxing must have all pins belonging to the same pin
916 * mux group.
917 */
918 static struct tz1090_pingroup tz1090_groups[] = {
919 /* Pin groups with drive control (with no out of place pins) */
920 /* pg_name, slw/schmitt/drv b */
921 DRV_PG(jtag, 11 /* 11, 22 */),
922 DRV_PG(tft, 10 /* 10, 20 */),
923 DRV_PG(scb2, 9 /* 9, 18 */),
924 DRV_PG(spi0, 7 /* 7, 14 */),
925 DRV_PG(uart, 5 /* 5, 10 */),
926 DRV_PG(scb1, 4 /* 4, 8 */),
927 DRV_PG(spi1, 3 /* 3, 6 */),
928 DRV_PG(afe, 0 /* 0, 0 */),
929
930 /*
931 * Drive specific pin groups (with odd combinations of pins which makes
932 * the pin group naming somewhat arbitrary)
933 */
934 /* pg_name, slw/schmitt/drv b */
935 DRV_PG(drive_sdio, 8 /* 8, 16 */), /* sdio_* + sdh_* */
936 DRV_PG(drive_i2s, 6 /* 6, 12 */), /* i2s_* + clk_out1 */
937 DRV_PG(drive_scb0, 2 /* 2, 4 */), /* scb0_* + pdm_{c,d} */
938 DRV_PG(drive_pdm, 1 /* 1, 2 */), /* pdm_{a,b} + clk_out0 */
939
940 /* Convenience pin groups */
941 /* pg_name */
942 SIMPLE_PG(uart0),
943 SIMPLE_PG(uart1),
944 SIMPLE_PG(scb0),
945 SIMPLE_PG(i2s),
946 SIMPLE_PG(sdh),
947 SIMPLE_PG(sdio),
948
949 /* pseudo-pingroups for each GPIO pin follow */
950 };
951
952 /**
953 * struct tz1090_pmx - Private pinctrl data
954 * @dev: Platform device
955 * @pctl: Pin control device
956 * @regs: Register region
957 * @lock: Lock protecting coherency of pin_en, gpio_en, and SELECT regs
958 * @pin_en: Pins that have been enabled (32 pins packed into each element)
959 * @gpio_en: GPIOs that have been enabled (32 pins packed into each element)
960 */
961 struct tz1090_pmx {
962 struct device *dev;
963 struct pinctrl_dev *pctl;
964 void __iomem *regs;
965 spinlock_t lock;
966 u32 pin_en[3];
967 u32 gpio_en[3];
968 };
969
pmx_read(struct tz1090_pmx * pmx,u32 reg)970 static inline u32 pmx_read(struct tz1090_pmx *pmx, u32 reg)
971 {
972 return ioread32(pmx->regs + reg);
973 }
974
pmx_write(struct tz1090_pmx * pmx,u32 val,u32 reg)975 static inline void pmx_write(struct tz1090_pmx *pmx, u32 val, u32 reg)
976 {
977 iowrite32(val, pmx->regs + reg);
978 }
979
980 /*
981 * Pin control operations
982 */
983
984 /* each GPIO pin has it's own pseudo pingroup containing only itself */
985
tz1090_pinctrl_get_groups_count(struct pinctrl_dev * pctldev)986 static int tz1090_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
987 {
988 return ARRAY_SIZE(tz1090_groups) + NUM_GPIOS;
989 }
990
tz1090_pinctrl_get_group_name(struct pinctrl_dev * pctldev,unsigned int group)991 static const char *tz1090_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
992 unsigned int group)
993 {
994 if (group < ARRAY_SIZE(tz1090_groups)) {
995 /* normal pingroup */
996 return tz1090_groups[group].name;
997 } else {
998 /* individual gpio pin pseudo-pingroup */
999 unsigned int pin = group - ARRAY_SIZE(tz1090_groups);
1000 return tz1090_pins[pin].name;
1001 }
1002 }
1003
tz1090_pinctrl_get_group_pins(struct pinctrl_dev * pctldev,unsigned int group,const unsigned int ** pins,unsigned int * num_pins)1004 static int tz1090_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
1005 unsigned int group,
1006 const unsigned int **pins,
1007 unsigned int *num_pins)
1008 {
1009 if (group < ARRAY_SIZE(tz1090_groups)) {
1010 /* normal pingroup */
1011 *pins = tz1090_groups[group].pins;
1012 *num_pins = tz1090_groups[group].npins;
1013 } else {
1014 /* individual gpio pin pseudo-pingroup */
1015 unsigned int pin = group - ARRAY_SIZE(tz1090_groups);
1016 *pins = &tz1090_pins[pin].number;
1017 *num_pins = 1;
1018 }
1019
1020 return 0;
1021 }
1022
1023 #ifdef CONFIG_DEBUG_FS
tz1090_pinctrl_pin_dbg_show(struct pinctrl_dev * pctldev,struct seq_file * s,unsigned int offset)1024 static void tz1090_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
1025 struct seq_file *s,
1026 unsigned int offset)
1027 {
1028 seq_printf(s, " %s", dev_name(pctldev->dev));
1029 }
1030 #endif
1031
reserve_map(struct device * dev,struct pinctrl_map ** map,unsigned int * reserved_maps,unsigned int * num_maps,unsigned int reserve)1032 static int reserve_map(struct device *dev, struct pinctrl_map **map,
1033 unsigned int *reserved_maps, unsigned int *num_maps,
1034 unsigned int reserve)
1035 {
1036 unsigned int old_num = *reserved_maps;
1037 unsigned int new_num = *num_maps + reserve;
1038 struct pinctrl_map *new_map;
1039
1040 if (old_num >= new_num)
1041 return 0;
1042
1043 new_map = krealloc(*map, sizeof(*new_map) * new_num, GFP_KERNEL);
1044 if (!new_map) {
1045 dev_err(dev, "krealloc(map) failed\n");
1046 return -ENOMEM;
1047 }
1048
1049 memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map));
1050
1051 *map = new_map;
1052 *reserved_maps = new_num;
1053
1054 return 0;
1055 }
1056
add_map_mux(struct pinctrl_map ** map,unsigned int * reserved_maps,unsigned int * num_maps,const char * group,const char * function)1057 static int add_map_mux(struct pinctrl_map **map, unsigned int *reserved_maps,
1058 unsigned int *num_maps, const char *group,
1059 const char *function)
1060 {
1061 if (WARN_ON(*num_maps == *reserved_maps))
1062 return -ENOSPC;
1063
1064 (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
1065 (*map)[*num_maps].data.mux.group = group;
1066 (*map)[*num_maps].data.mux.function = function;
1067 (*num_maps)++;
1068
1069 return 0;
1070 }
1071
add_map_configs(struct device * dev,struct pinctrl_map ** map,unsigned int * reserved_maps,unsigned int * num_maps,const char * group,unsigned long * configs,unsigned int num_configs)1072 static int add_map_configs(struct device *dev,
1073 struct pinctrl_map **map,
1074 unsigned int *reserved_maps, unsigned int *num_maps,
1075 const char *group, unsigned long *configs,
1076 unsigned int num_configs)
1077 {
1078 unsigned long *dup_configs;
1079
1080 if (WARN_ON(*num_maps == *reserved_maps))
1081 return -ENOSPC;
1082
1083 dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
1084 GFP_KERNEL);
1085 if (!dup_configs) {
1086 dev_err(dev, "kmemdup(configs) failed\n");
1087 return -ENOMEM;
1088 }
1089
1090 (*map)[*num_maps].type = PIN_MAP_TYPE_CONFIGS_GROUP;
1091 (*map)[*num_maps].data.configs.group_or_pin = group;
1092 (*map)[*num_maps].data.configs.configs = dup_configs;
1093 (*map)[*num_maps].data.configs.num_configs = num_configs;
1094 (*num_maps)++;
1095
1096 return 0;
1097 }
1098
tz1090_pinctrl_dt_free_map(struct pinctrl_dev * pctldev,struct pinctrl_map * map,unsigned int num_maps)1099 static void tz1090_pinctrl_dt_free_map(struct pinctrl_dev *pctldev,
1100 struct pinctrl_map *map,
1101 unsigned int num_maps)
1102 {
1103 int i;
1104
1105 for (i = 0; i < num_maps; i++)
1106 if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
1107 kfree(map[i].data.configs.configs);
1108
1109 kfree(map);
1110 }
1111
tz1090_pinctrl_dt_subnode_to_map(struct device * dev,struct device_node * np,struct pinctrl_map ** map,unsigned int * reserved_maps,unsigned int * num_maps)1112 static int tz1090_pinctrl_dt_subnode_to_map(struct device *dev,
1113 struct device_node *np,
1114 struct pinctrl_map **map,
1115 unsigned int *reserved_maps,
1116 unsigned int *num_maps)
1117 {
1118 int ret;
1119 const char *function;
1120 unsigned long *configs = NULL;
1121 unsigned int num_configs = 0;
1122 unsigned int reserve;
1123 struct property *prop;
1124 const char *group;
1125
1126 ret = of_property_read_string(np, "tz1090,function", &function);
1127 if (ret < 0) {
1128 /* EINVAL=missing, which is fine since it's optional */
1129 if (ret != -EINVAL)
1130 dev_err(dev, "could not parse property function\n");
1131 function = NULL;
1132 }
1133
1134 ret = pinconf_generic_parse_dt_config(np, &configs, &num_configs);
1135 if (ret)
1136 return ret;
1137
1138 reserve = 0;
1139 if (function != NULL)
1140 reserve++;
1141 if (num_configs)
1142 reserve++;
1143 ret = of_property_count_strings(np, "tz1090,pins");
1144 if (ret < 0) {
1145 dev_err(dev, "could not parse property pins\n");
1146 goto exit;
1147 }
1148 reserve *= ret;
1149
1150 ret = reserve_map(dev, map, reserved_maps, num_maps, reserve);
1151 if (ret < 0)
1152 goto exit;
1153
1154 of_property_for_each_string(np, "tz1090,pins", prop, group) {
1155 if (function) {
1156 ret = add_map_mux(map, reserved_maps, num_maps,
1157 group, function);
1158 if (ret < 0)
1159 goto exit;
1160 }
1161
1162 if (num_configs) {
1163 ret = add_map_configs(dev, map, reserved_maps,
1164 num_maps, group, configs,
1165 num_configs);
1166 if (ret < 0)
1167 goto exit;
1168 }
1169 }
1170
1171 ret = 0;
1172
1173 exit:
1174 kfree(configs);
1175 return ret;
1176 }
1177
tz1090_pinctrl_dt_node_to_map(struct pinctrl_dev * pctldev,struct device_node * np_config,struct pinctrl_map ** map,unsigned int * num_maps)1178 static int tz1090_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
1179 struct device_node *np_config,
1180 struct pinctrl_map **map,
1181 unsigned int *num_maps)
1182 {
1183 unsigned int reserved_maps;
1184 struct device_node *np;
1185 int ret;
1186
1187 reserved_maps = 0;
1188 *map = NULL;
1189 *num_maps = 0;
1190
1191 for_each_child_of_node(np_config, np) {
1192 ret = tz1090_pinctrl_dt_subnode_to_map(pctldev->dev, np, map,
1193 &reserved_maps,
1194 num_maps);
1195 if (ret < 0) {
1196 tz1090_pinctrl_dt_free_map(pctldev, *map, *num_maps);
1197 return ret;
1198 }
1199 }
1200
1201 return 0;
1202 }
1203
1204 static struct pinctrl_ops tz1090_pinctrl_ops = {
1205 .get_groups_count = tz1090_pinctrl_get_groups_count,
1206 .get_group_name = tz1090_pinctrl_get_group_name,
1207 .get_group_pins = tz1090_pinctrl_get_group_pins,
1208 #ifdef CONFIG_DEBUG_FS
1209 .pin_dbg_show = tz1090_pinctrl_pin_dbg_show,
1210 #endif
1211 .dt_node_to_map = tz1090_pinctrl_dt_node_to_map,
1212 .dt_free_map = tz1090_pinctrl_dt_free_map,
1213 };
1214
1215 /*
1216 * Pin mux operations
1217 */
1218
tz1090_pinctrl_get_funcs_count(struct pinctrl_dev * pctldev)1219 static int tz1090_pinctrl_get_funcs_count(struct pinctrl_dev *pctldev)
1220 {
1221 return ARRAY_SIZE(tz1090_functions);
1222 }
1223
tz1090_pinctrl_get_func_name(struct pinctrl_dev * pctldev,unsigned int function)1224 static const char *tz1090_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
1225 unsigned int function)
1226 {
1227 return tz1090_functions[function].name;
1228 }
1229
tz1090_pinctrl_get_func_groups(struct pinctrl_dev * pctldev,unsigned int function,const char * const ** groups,unsigned int * const num_groups)1230 static int tz1090_pinctrl_get_func_groups(struct pinctrl_dev *pctldev,
1231 unsigned int function,
1232 const char * const **groups,
1233 unsigned int * const num_groups)
1234 {
1235 /* pingroup functions */
1236 *groups = tz1090_functions[function].groups;
1237 *num_groups = tz1090_functions[function].ngroups;
1238 return 0;
1239 }
1240
1241 /**
1242 * tz1090_pinctrl_select() - update bit in SELECT register
1243 * @pmx: Pinmux data
1244 * @pin: Pin number (must be within GPIO range)
1245 */
tz1090_pinctrl_select(struct tz1090_pmx * pmx,unsigned int pin)1246 static void tz1090_pinctrl_select(struct tz1090_pmx *pmx,
1247 unsigned int pin)
1248 {
1249 u32 reg, reg_shift, select, val;
1250 unsigned int pmx_index, pmx_shift;
1251 unsigned long flags;
1252
1253 /* uses base 32 instead of base 30 */
1254 pmx_index = pin >> 5;
1255 pmx_shift = pin & 0x1f;
1256
1257 /* select = !perip || gpio */
1258 select = ((~pmx->pin_en[pmx_index] |
1259 pmx->gpio_en[pmx_index]) >> pmx_shift) & 1;
1260
1261 /* find register and bit offset (base 30) */
1262 reg = REG_PINCTRL_SELECT + 4*(pin / 30);
1263 reg_shift = pin % 30;
1264
1265 /* modify gpio select bit */
1266 __global_lock2(flags);
1267 val = pmx_read(pmx, reg);
1268 val &= ~BIT(reg_shift);
1269 val |= select << reg_shift;
1270 pmx_write(pmx, val, reg);
1271 __global_unlock2(flags);
1272 }
1273
1274 /**
1275 * tz1090_pinctrl_gpio_select() - enable/disable GPIO usage for a pin
1276 * @pmx: Pinmux data
1277 * @pin: Pin number
1278 * @gpio_select: true to enable pin as GPIO,
1279 * false to leave control to whatever function is enabled
1280 *
1281 * Records that GPIO usage is enabled/disabled so that enabling a function
1282 * doesn't override the SELECT register bit.
1283 */
tz1090_pinctrl_gpio_select(struct tz1090_pmx * pmx,unsigned int pin,bool gpio_select)1284 static void tz1090_pinctrl_gpio_select(struct tz1090_pmx *pmx,
1285 unsigned int pin,
1286 bool gpio_select)
1287 {
1288 unsigned int index, shift;
1289 u32 gpio_en;
1290
1291 if (pin >= NUM_GPIOS)
1292 return;
1293
1294 /* uses base 32 instead of base 30 */
1295 index = pin >> 5;
1296 shift = pin & 0x1f;
1297
1298 spin_lock(&pmx->lock);
1299
1300 /* keep a record whether gpio is selected */
1301 gpio_en = pmx->gpio_en[index];
1302 gpio_en &= ~BIT(shift);
1303 if (gpio_select)
1304 gpio_en |= BIT(shift);
1305 pmx->gpio_en[index] = gpio_en;
1306
1307 /* update the select bit */
1308 tz1090_pinctrl_select(pmx, pin);
1309
1310 spin_unlock(&pmx->lock);
1311 }
1312
1313 /**
1314 * tz1090_pinctrl_perip_select() - enable/disable peripheral interface for a pin
1315 * @pmx: Pinmux data
1316 * @pin: Pin number
1317 * @perip_select: true to enable peripheral interface when not GPIO,
1318 * false to leave pin in GPIO mode
1319 *
1320 * Records that peripheral usage is enabled/disabled so that SELECT register can
1321 * be set appropriately when GPIO is disabled.
1322 */
tz1090_pinctrl_perip_select(struct tz1090_pmx * pmx,unsigned int pin,bool perip_select)1323 static void tz1090_pinctrl_perip_select(struct tz1090_pmx *pmx,
1324 unsigned int pin,
1325 bool perip_select)
1326 {
1327 unsigned int index, shift;
1328 u32 pin_en;
1329
1330 if (pin >= NUM_GPIOS)
1331 return;
1332
1333 /* uses base 32 instead of base 30 */
1334 index = pin >> 5;
1335 shift = pin & 0x1f;
1336
1337 spin_lock(&pmx->lock);
1338
1339 /* keep a record whether peripheral is selected */
1340 pin_en = pmx->pin_en[index];
1341 pin_en &= ~BIT(shift);
1342 if (perip_select)
1343 pin_en |= BIT(shift);
1344 pmx->pin_en[index] = pin_en;
1345
1346 /* update the select bit */
1347 tz1090_pinctrl_select(pmx, pin);
1348
1349 spin_unlock(&pmx->lock);
1350 }
1351
1352 /**
1353 * tz1090_pinctrl_enable_mux() - Switch a pin mux group to a function.
1354 * @pmx: Pinmux data
1355 * @desc: Pinmux description
1356 * @function: Function to switch to
1357 *
1358 * Enable a particular function on a pin mux group. Since pin mux descriptions
1359 * are nested this function is recursive.
1360 */
tz1090_pinctrl_enable_mux(struct tz1090_pmx * pmx,const struct tz1090_muxdesc * desc,unsigned int function)1361 static int tz1090_pinctrl_enable_mux(struct tz1090_pmx *pmx,
1362 const struct tz1090_muxdesc *desc,
1363 unsigned int function)
1364 {
1365 const int *fit;
1366 unsigned long flags;
1367 int mux;
1368 unsigned int func, ret;
1369 u32 reg, mask;
1370
1371 /* find the mux value for this function, searching recursively */
1372 for (mux = 0, fit = desc->funcs;
1373 mux < ARRAY_SIZE(desc->funcs); ++mux, ++fit) {
1374 func = *fit;
1375 if (func == function)
1376 goto found_mux;
1377
1378 /* maybe it's a sub-mux */
1379 if (func < ARRAY_SIZE(tz1090_submux) && tz1090_submux[func]) {
1380 ret = tz1090_pinctrl_enable_mux(pmx,
1381 tz1090_submux[func],
1382 function);
1383 if (!ret)
1384 goto found_mux;
1385 }
1386 }
1387
1388 return -EINVAL;
1389 found_mux:
1390
1391 /* Set up the mux */
1392 if (desc->width) {
1393 mask = (BIT(desc->width) - 1) << desc->bit;
1394 __global_lock2(flags);
1395 reg = pmx_read(pmx, desc->reg);
1396 reg &= ~mask;
1397 reg |= (mux << desc->bit) & mask;
1398 pmx_write(pmx, reg, desc->reg);
1399 __global_unlock2(flags);
1400 }
1401
1402 return 0;
1403 }
1404
1405 /**
1406 * tz1090_pinctrl_enable() - Enable a function on a pin group.
1407 * @pctldev: Pin control data
1408 * @function: Function index to enable
1409 * @group: Group index to enable
1410 *
1411 * Enable a particular function on a group of pins. The per GPIO pin pseudo pin
1412 * groups can be used (in which case the pin will be enabled in peripheral mode
1413 * and if it belongs to a pin mux group the mux will be switched if it isn't
1414 * already in use. Some convenience pin groups can also be used in which case
1415 * the effect is the same as enabling the function on each individual pin in the
1416 * group.
1417 */
tz1090_pinctrl_set_mux(struct pinctrl_dev * pctldev,unsigned int function,unsigned int group)1418 static int tz1090_pinctrl_set_mux(struct pinctrl_dev *pctldev,
1419 unsigned int function, unsigned int group)
1420 {
1421 struct tz1090_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
1422 struct tz1090_pingroup *grp;
1423 int ret;
1424 unsigned int pin_num, mux_group, i, npins;
1425 const unsigned int *pins;
1426
1427 /* group of pins? */
1428 if (group < ARRAY_SIZE(tz1090_groups)) {
1429 grp = &tz1090_groups[group];
1430 npins = grp->npins;
1431 pins = grp->pins;
1432 /*
1433 * All pins in the group must belong to the same mux group,
1434 * which allows us to just use the mux group of the first pin.
1435 * By explicitly listing permitted pingroups for each function
1436 * the pinmux core should ensure this is always the case.
1437 */
1438 } else {
1439 pin_num = group - ARRAY_SIZE(tz1090_groups);
1440 npins = 1;
1441 pins = &pin_num;
1442 }
1443 mux_group = tz1090_mux_pins[*pins];
1444
1445 /* no mux group, but can still be individually muxed to peripheral */
1446 if (mux_group >= TZ1090_MUX_GROUP_MAX) {
1447 if (function == TZ1090_MUX_PERIP)
1448 goto mux_pins;
1449 return -EINVAL;
1450 }
1451
1452 /* mux group already set to a different function? */
1453 grp = &tz1090_mux_groups[mux_group];
1454 if (grp->func_count && grp->func != function) {
1455 dev_err(pctldev->dev,
1456 "%s: can't mux pin(s) to '%s', group already muxed to '%s'\n",
1457 __func__, tz1090_functions[function].name,
1458 tz1090_functions[grp->func].name);
1459 return -EBUSY;
1460 }
1461
1462 dev_dbg(pctldev->dev, "%s: muxing %u pin(s) in '%s' to '%s'\n",
1463 __func__, npins, grp->name, tz1090_functions[function].name);
1464
1465 /* if first pin in mux group to be enabled, enable the group mux */
1466 if (!grp->func_count) {
1467 grp->func = function;
1468 ret = tz1090_pinctrl_enable_mux(pmx, &grp->mux, function);
1469 if (ret)
1470 return ret;
1471 }
1472 /* add pins to ref count and mux individually to peripheral */
1473 grp->func_count += npins;
1474 mux_pins:
1475 for (i = 0; i < npins; ++i)
1476 tz1090_pinctrl_perip_select(pmx, pins[i], true);
1477
1478 return 0;
1479 }
1480
1481 /**
1482 * tz1090_pinctrl_gpio_request_enable() - Put pin in GPIO mode.
1483 * @pctldev: Pin control data
1484 * @range: GPIO range
1485 * @pin: Pin number
1486 *
1487 * Puts a particular pin into GPIO mode, disabling peripheral control until it's
1488 * disabled again.
1489 */
tz1090_pinctrl_gpio_request_enable(struct pinctrl_dev * pctldev,struct pinctrl_gpio_range * range,unsigned int pin)1490 static int tz1090_pinctrl_gpio_request_enable(struct pinctrl_dev *pctldev,
1491 struct pinctrl_gpio_range *range,
1492 unsigned int pin)
1493 {
1494 struct tz1090_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
1495 tz1090_pinctrl_gpio_select(pmx, pin, true);
1496 return 0;
1497 }
1498
1499 /**
1500 * tz1090_pinctrl_gpio_disable_free() - Take pin out of GPIO mode.
1501 * @pctldev: Pin control data
1502 * @range: GPIO range
1503 * @pin: Pin number
1504 *
1505 * Take a particular pin out of GPIO mode. If the pin is enabled for a
1506 * peripheral it will return to peripheral mode.
1507 */
tz1090_pinctrl_gpio_disable_free(struct pinctrl_dev * pctldev,struct pinctrl_gpio_range * range,unsigned int pin)1508 static void tz1090_pinctrl_gpio_disable_free(struct pinctrl_dev *pctldev,
1509 struct pinctrl_gpio_range *range,
1510 unsigned int pin)
1511 {
1512 struct tz1090_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
1513 tz1090_pinctrl_gpio_select(pmx, pin, false);
1514 }
1515
1516 static struct pinmux_ops tz1090_pinmux_ops = {
1517 .get_functions_count = tz1090_pinctrl_get_funcs_count,
1518 .get_function_name = tz1090_pinctrl_get_func_name,
1519 .get_function_groups = tz1090_pinctrl_get_func_groups,
1520 .set_mux = tz1090_pinctrl_set_mux,
1521 .gpio_request_enable = tz1090_pinctrl_gpio_request_enable,
1522 .gpio_disable_free = tz1090_pinctrl_gpio_disable_free,
1523 };
1524
1525 /*
1526 * Pin config operations
1527 */
1528
1529 struct tz1090_pinconf_pullup {
1530 unsigned char index;
1531 unsigned char shift;
1532 };
1533
1534 /* The mapping of pin to pull up/down register index and shift */
1535 static struct tz1090_pinconf_pullup tz1090_pinconf_pullup[] = {
1536 {5, 22}, /* 0 - TZ1090_PIN_SDIO_CLK */
1537 {0, 14}, /* 1 - TZ1090_PIN_SDIO_CMD */
1538 {0, 6}, /* 2 - TZ1090_PIN_SDIO_D0 */
1539 {0, 8}, /* 3 - TZ1090_PIN_SDIO_D1 */
1540 {0, 10}, /* 4 - TZ1090_PIN_SDIO_D2 */
1541 {0, 12}, /* 5 - TZ1090_PIN_SDIO_D3 */
1542 {0, 2}, /* 6 - TZ1090_PIN_SDH_CD */
1543 {0, 4}, /* 7 - TZ1090_PIN_SDH_WP */
1544 {0, 16}, /* 8 - TZ1090_PIN_SPI0_MCLK */
1545 {0, 18}, /* 9 - TZ1090_PIN_SPI0_CS0 */
1546 {0, 20}, /* 10 - TZ1090_PIN_SPI0_CS1 */
1547 {0, 22}, /* 11 - TZ1090_PIN_SPI0_CS2 */
1548 {0, 24}, /* 12 - TZ1090_PIN_SPI0_DOUT */
1549 {0, 26}, /* 13 - TZ1090_PIN_SPI0_DIN */
1550 {0, 28}, /* 14 - TZ1090_PIN_SPI1_MCLK */
1551 {0, 30}, /* 15 - TZ1090_PIN_SPI1_CS0 */
1552 {1, 0}, /* 16 - TZ1090_PIN_SPI1_CS1 */
1553 {1, 2}, /* 17 - TZ1090_PIN_SPI1_CS2 */
1554 {1, 4}, /* 18 - TZ1090_PIN_SPI1_DOUT */
1555 {1, 6}, /* 19 - TZ1090_PIN_SPI1_DIN */
1556 {1, 8}, /* 20 - TZ1090_PIN_UART0_RXD */
1557 {1, 10}, /* 21 - TZ1090_PIN_UART0_TXD */
1558 {1, 12}, /* 22 - TZ1090_PIN_UART0_CTS */
1559 {1, 14}, /* 23 - TZ1090_PIN_UART0_RTS */
1560 {1, 16}, /* 24 - TZ1090_PIN_UART1_RXD */
1561 {1, 18}, /* 25 - TZ1090_PIN_UART1_TXD */
1562 {1, 20}, /* 26 - TZ1090_PIN_SCB0_SDAT */
1563 {1, 22}, /* 27 - TZ1090_PIN_SCB0_SCLK */
1564 {1, 24}, /* 28 - TZ1090_PIN_SCB1_SDAT */
1565 {1, 26}, /* 29 - TZ1090_PIN_SCB1_SCLK */
1566
1567 {1, 28}, /* 30 - TZ1090_PIN_SCB2_SDAT */
1568 {1, 30}, /* 31 - TZ1090_PIN_SCB2_SCLK */
1569 {2, 0}, /* 32 - TZ1090_PIN_I2S_MCLK */
1570 {2, 2}, /* 33 - TZ1090_PIN_I2S_BCLK_OUT */
1571 {2, 4}, /* 34 - TZ1090_PIN_I2S_LRCLK_OUT */
1572 {2, 6}, /* 35 - TZ1090_PIN_I2S_DOUT0 */
1573 {2, 8}, /* 36 - TZ1090_PIN_I2S_DOUT1 */
1574 {2, 10}, /* 37 - TZ1090_PIN_I2S_DOUT2 */
1575 {2, 12}, /* 38 - TZ1090_PIN_I2S_DIN */
1576 {4, 12}, /* 39 - TZ1090_PIN_PDM_A */
1577 {4, 14}, /* 40 - TZ1090_PIN_PDM_B */
1578 {4, 18}, /* 41 - TZ1090_PIN_PDM_C */
1579 {4, 20}, /* 42 - TZ1090_PIN_PDM_D */
1580 {2, 14}, /* 43 - TZ1090_PIN_TFT_RED0 */
1581 {2, 16}, /* 44 - TZ1090_PIN_TFT_RED1 */
1582 {2, 18}, /* 45 - TZ1090_PIN_TFT_RED2 */
1583 {2, 20}, /* 46 - TZ1090_PIN_TFT_RED3 */
1584 {2, 22}, /* 47 - TZ1090_PIN_TFT_RED4 */
1585 {2, 24}, /* 48 - TZ1090_PIN_TFT_RED5 */
1586 {2, 26}, /* 49 - TZ1090_PIN_TFT_RED6 */
1587 {2, 28}, /* 50 - TZ1090_PIN_TFT_RED7 */
1588 {2, 30}, /* 51 - TZ1090_PIN_TFT_GREEN0 */
1589 {3, 0}, /* 52 - TZ1090_PIN_TFT_GREEN1 */
1590 {3, 2}, /* 53 - TZ1090_PIN_TFT_GREEN2 */
1591 {3, 4}, /* 54 - TZ1090_PIN_TFT_GREEN3 */
1592 {3, 6}, /* 55 - TZ1090_PIN_TFT_GREEN4 */
1593 {3, 8}, /* 56 - TZ1090_PIN_TFT_GREEN5 */
1594 {3, 10}, /* 57 - TZ1090_PIN_TFT_GREEN6 */
1595 {3, 12}, /* 58 - TZ1090_PIN_TFT_GREEN7 */
1596 {3, 14}, /* 59 - TZ1090_PIN_TFT_BLUE0 */
1597
1598 {3, 16}, /* 60 - TZ1090_PIN_TFT_BLUE1 */
1599 {3, 18}, /* 61 - TZ1090_PIN_TFT_BLUE2 */
1600 {3, 20}, /* 62 - TZ1090_PIN_TFT_BLUE3 */
1601 {3, 22}, /* 63 - TZ1090_PIN_TFT_BLUE4 */
1602 {3, 24}, /* 64 - TZ1090_PIN_TFT_BLUE5 */
1603 {3, 26}, /* 65 - TZ1090_PIN_TFT_BLUE6 */
1604 {3, 28}, /* 66 - TZ1090_PIN_TFT_BLUE7 */
1605 {3, 30}, /* 67 - TZ1090_PIN_TFT_VDDEN_GD */
1606 {4, 0}, /* 68 - TZ1090_PIN_TFT_PANELCLK */
1607 {4, 2}, /* 69 - TZ1090_PIN_TFT_BLANK_LS */
1608 {4, 4}, /* 70 - TZ1090_PIN_TFT_VSYNC_NS */
1609 {4, 6}, /* 71 - TZ1090_PIN_TFT_HSYNC_NR */
1610 {4, 8}, /* 72 - TZ1090_PIN_TFT_VD12ACB */
1611 {4, 10}, /* 73 - TZ1090_PIN_TFT_PWRSAVE */
1612 {4, 24}, /* 74 - TZ1090_PIN_TX_ON */
1613 {4, 26}, /* 75 - TZ1090_PIN_RX_ON */
1614 {4, 28}, /* 76 - TZ1090_PIN_PLL_ON */
1615 {4, 30}, /* 77 - TZ1090_PIN_PA_ON */
1616 {5, 0}, /* 78 - TZ1090_PIN_RX_HP */
1617 {5, 6}, /* 79 - TZ1090_PIN_GAIN0 */
1618 {5, 8}, /* 80 - TZ1090_PIN_GAIN1 */
1619 {5, 10}, /* 81 - TZ1090_PIN_GAIN2 */
1620 {5, 12}, /* 82 - TZ1090_PIN_GAIN3 */
1621 {5, 14}, /* 83 - TZ1090_PIN_GAIN4 */
1622 {5, 16}, /* 84 - TZ1090_PIN_GAIN5 */
1623 {5, 18}, /* 85 - TZ1090_PIN_GAIN6 */
1624 {5, 20}, /* 86 - TZ1090_PIN_GAIN7 */
1625 {5, 2}, /* 87 - TZ1090_PIN_ANT_SEL0 */
1626 {5, 4}, /* 88 - TZ1090_PIN_ANT_SEL1 */
1627 {0, 0}, /* 89 - TZ1090_PIN_SDH_CLK_IN */
1628
1629 {5, 24}, /* 90 - TZ1090_PIN_TCK */
1630 {5, 26}, /* 91 - TZ1090_PIN_TRST */
1631 {5, 28}, /* 92 - TZ1090_PIN_TDI */
1632 {5, 30}, /* 93 - TZ1090_PIN_TDO */
1633 {6, 0}, /* 94 - TZ1090_PIN_TMS */
1634 {4, 16}, /* 95 - TZ1090_PIN_CLK_OUT0 */
1635 {4, 22}, /* 96 - TZ1090_PIN_CLK_OUT1 */
1636 };
1637
tz1090_pinconf_reg(struct pinctrl_dev * pctldev,unsigned int pin,enum pin_config_param param,bool report_err,u32 * reg,u32 * width,u32 * mask,u32 * shift,u32 * val)1638 static int tz1090_pinconf_reg(struct pinctrl_dev *pctldev,
1639 unsigned int pin,
1640 enum pin_config_param param,
1641 bool report_err,
1642 u32 *reg, u32 *width, u32 *mask, u32 *shift,
1643 u32 *val)
1644 {
1645 struct tz1090_pinconf_pullup *pu;
1646
1647 /* All supported pins have controllable input bias */
1648 switch (param) {
1649 case PIN_CONFIG_BIAS_DISABLE:
1650 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
1651 *val = REG_PU_PD_TRISTATE;
1652 break;
1653 case PIN_CONFIG_BIAS_PULL_UP:
1654 *val = REG_PU_PD_UP;
1655 break;
1656 case PIN_CONFIG_BIAS_PULL_DOWN:
1657 *val = REG_PU_PD_DOWN;
1658 break;
1659 case PIN_CONFIG_BIAS_BUS_HOLD:
1660 *val = REG_PU_PD_REPEATER;
1661 break;
1662 default:
1663 return -ENOTSUPP;
1664 };
1665
1666 /* Only input bias parameters supported */
1667 pu = &tz1090_pinconf_pullup[pin];
1668 *reg = REG_PINCTRL_PU_PD + 4*pu->index;
1669 *shift = pu->shift;
1670 *width = 2;
1671
1672 /* Calculate field information */
1673 *mask = (BIT(*width) - 1) << *shift;
1674
1675 return 0;
1676 }
1677
tz1090_pinconf_get(struct pinctrl_dev * pctldev,unsigned int pin,unsigned long * config)1678 static int tz1090_pinconf_get(struct pinctrl_dev *pctldev,
1679 unsigned int pin, unsigned long *config)
1680 {
1681 struct tz1090_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
1682 enum pin_config_param param = pinconf_to_config_param(*config);
1683 int ret;
1684 u32 reg, width, mask, shift, val, tmp, arg;
1685
1686 /* Get register information */
1687 ret = tz1090_pinconf_reg(pctldev, pin, param, true,
1688 ®, &width, &mask, &shift, &val);
1689 if (ret < 0)
1690 return ret;
1691
1692 /* Extract field from register */
1693 tmp = pmx_read(pmx, reg);
1694 arg = ((tmp & mask) >> shift) == val;
1695
1696 /* Config not active */
1697 if (!arg)
1698 return -EINVAL;
1699
1700 /* And pack config */
1701 *config = pinconf_to_config_packed(param, arg);
1702
1703 return 0;
1704 }
1705
tz1090_pinconf_set(struct pinctrl_dev * pctldev,unsigned int pin,unsigned long * configs,unsigned num_configs)1706 static int tz1090_pinconf_set(struct pinctrl_dev *pctldev,
1707 unsigned int pin, unsigned long *configs,
1708 unsigned num_configs)
1709 {
1710 struct tz1090_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
1711 enum pin_config_param param;
1712 unsigned int arg;
1713 int ret;
1714 u32 reg, width, mask, shift, val, tmp;
1715 unsigned long flags;
1716 int i;
1717
1718 for (i = 0; i < num_configs; i++) {
1719 param = pinconf_to_config_param(configs[i]);
1720 arg = pinconf_to_config_argument(configs[i]);
1721
1722 dev_dbg(pctldev->dev, "%s(pin=%s, config=%#lx)\n",
1723 __func__, tz1090_pins[pin].name, configs[i]);
1724
1725 /* Get register information */
1726 ret = tz1090_pinconf_reg(pctldev, pin, param, true,
1727 ®, &width, &mask, &shift, &val);
1728 if (ret < 0)
1729 return ret;
1730
1731 /* Unpack argument and range check it */
1732 if (arg > 1) {
1733 dev_dbg(pctldev->dev, "%s: arg %u out of range\n",
1734 __func__, arg);
1735 return -EINVAL;
1736 }
1737
1738 /* Write register field */
1739 __global_lock2(flags);
1740 tmp = pmx_read(pmx, reg);
1741 tmp &= ~mask;
1742 if (arg)
1743 tmp |= val << shift;
1744 pmx_write(pmx, tmp, reg);
1745 __global_unlock2(flags);
1746 } /* for each config */
1747
1748 return 0;
1749 }
1750
1751 static const int tz1090_boolean_map[] = {
1752 [0] = -EINVAL,
1753 [1] = 1,
1754 };
1755
1756 static const int tz1090_dr_map[] = {
1757 [REG_DR_2mA] = 2,
1758 [REG_DR_4mA] = 4,
1759 [REG_DR_8mA] = 8,
1760 [REG_DR_12mA] = 12,
1761 };
1762
tz1090_pinconf_group_reg(struct pinctrl_dev * pctldev,const struct tz1090_pingroup * g,enum pin_config_param param,bool report_err,u32 * reg,u32 * width,u32 * mask,u32 * shift,const int ** map)1763 static int tz1090_pinconf_group_reg(struct pinctrl_dev *pctldev,
1764 const struct tz1090_pingroup *g,
1765 enum pin_config_param param,
1766 bool report_err,
1767 u32 *reg, u32 *width, u32 *mask, u32 *shift,
1768 const int **map)
1769 {
1770 /* Drive configuration applies in groups, but not to all groups. */
1771 if (!g->drv) {
1772 if (report_err)
1773 dev_dbg(pctldev->dev,
1774 "%s: group %s has no drive control\n",
1775 __func__, g->name);
1776 return -ENOTSUPP;
1777 }
1778
1779 /* Find information about drive parameter's register */
1780 switch (param) {
1781 case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
1782 *reg = REG_PINCTRL_SCHMITT;
1783 *width = 1;
1784 *map = tz1090_boolean_map;
1785 break;
1786 case PIN_CONFIG_DRIVE_STRENGTH:
1787 *reg = REG_PINCTRL_DR;
1788 *width = 2;
1789 *map = tz1090_dr_map;
1790 break;
1791 default:
1792 return -ENOTSUPP;
1793 };
1794
1795 /* Calculate field information */
1796 *shift = g->slw_bit * *width;
1797 *mask = (BIT(*width) - 1) << *shift;
1798
1799 return 0;
1800 }
1801
tz1090_pinconf_group_get(struct pinctrl_dev * pctldev,unsigned int group,unsigned long * config)1802 static int tz1090_pinconf_group_get(struct pinctrl_dev *pctldev,
1803 unsigned int group,
1804 unsigned long *config)
1805 {
1806 struct tz1090_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
1807 const struct tz1090_pingroup *g;
1808 enum pin_config_param param = pinconf_to_config_param(*config);
1809 int ret, arg;
1810 unsigned int pin;
1811 u32 reg, width, mask, shift, val;
1812 const int *map;
1813
1814 if (group >= ARRAY_SIZE(tz1090_groups)) {
1815 pin = group - ARRAY_SIZE(tz1090_groups);
1816 return tz1090_pinconf_get(pctldev, pin, config);
1817 }
1818
1819 g = &tz1090_groups[group];
1820 if (g->npins == 1) {
1821 pin = g->pins[0];
1822 ret = tz1090_pinconf_get(pctldev, pin, config);
1823 if (ret != -ENOTSUPP)
1824 return ret;
1825 }
1826
1827 /* Get register information */
1828 ret = tz1090_pinconf_group_reg(pctldev, g, param, true,
1829 ®, &width, &mask, &shift, &map);
1830 if (ret < 0)
1831 return ret;
1832
1833 /* Extract field from register */
1834 val = pmx_read(pmx, reg);
1835 arg = map[(val & mask) >> shift];
1836 if (arg < 0)
1837 return arg;
1838
1839 /* And pack config */
1840 *config = pinconf_to_config_packed(param, arg);
1841
1842 return 0;
1843 }
1844
tz1090_pinconf_group_set(struct pinctrl_dev * pctldev,unsigned int group,unsigned long * configs,unsigned num_configs)1845 static int tz1090_pinconf_group_set(struct pinctrl_dev *pctldev,
1846 unsigned int group, unsigned long *configs,
1847 unsigned num_configs)
1848 {
1849 struct tz1090_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
1850 const struct tz1090_pingroup *g;
1851 enum pin_config_param param;
1852 unsigned int arg, pin, i;
1853 const unsigned int *pit;
1854 int ret;
1855 u32 reg, width, mask, shift, val;
1856 unsigned long flags;
1857 const int *map;
1858 int j;
1859
1860 if (group >= ARRAY_SIZE(tz1090_groups)) {
1861 pin = group - ARRAY_SIZE(tz1090_groups);
1862 return tz1090_pinconf_set(pctldev, pin, configs, num_configs);
1863 }
1864
1865 g = &tz1090_groups[group];
1866 if (g->npins == 1) {
1867 pin = g->pins[0];
1868 ret = tz1090_pinconf_set(pctldev, pin, configs, num_configs);
1869 if (ret != -ENOTSUPP)
1870 return ret;
1871 }
1872
1873 for (j = 0; j < num_configs; j++) {
1874 param = pinconf_to_config_param(configs[j]);
1875
1876 dev_dbg(pctldev->dev, "%s(group=%s, config=%#lx)\n",
1877 __func__, g->name, configs[j]);
1878
1879 /* Get register information */
1880 ret = tz1090_pinconf_group_reg(pctldev, g, param, true, ®,
1881 &width, &mask, &shift, &map);
1882 if (ret < 0) {
1883 /*
1884 * Maybe we're trying to set a per-pin configuration
1885 * of a group, so do the pins one by one. This is
1886 * mainly as a convenience.
1887 */
1888 for (i = 0, pit = g->pins; i < g->npins; ++i, ++pit) {
1889 ret = tz1090_pinconf_set(pctldev, *pit, configs,
1890 num_configs);
1891 if (ret)
1892 return ret;
1893 }
1894 return 0;
1895 }
1896
1897 /* Unpack argument and map it to register value */
1898 arg = pinconf_to_config_argument(configs[j]);
1899 for (i = 0; i < BIT(width); ++i) {
1900 if (map[i] == arg || (map[i] == -EINVAL && !arg)) {
1901 /* Write register field */
1902 __global_lock2(flags);
1903 val = pmx_read(pmx, reg);
1904 val &= ~mask;
1905 val |= i << shift;
1906 pmx_write(pmx, val, reg);
1907 __global_unlock2(flags);
1908 goto next_config;
1909 }
1910 }
1911
1912 dev_dbg(pctldev->dev, "%s: arg %u not supported\n",
1913 __func__, arg);
1914 return -EINVAL;
1915
1916 next_config:
1917 ;
1918 } /* for each config */
1919
1920 return 0;
1921 }
1922
1923 static struct pinconf_ops tz1090_pinconf_ops = {
1924 .is_generic = true,
1925 .pin_config_get = tz1090_pinconf_get,
1926 .pin_config_set = tz1090_pinconf_set,
1927 .pin_config_group_get = tz1090_pinconf_group_get,
1928 .pin_config_group_set = tz1090_pinconf_group_set,
1929 .pin_config_config_dbg_show = pinconf_generic_dump_config,
1930 };
1931
1932 /*
1933 * Pin control driver setup
1934 */
1935
1936 static struct pinctrl_desc tz1090_pinctrl_desc = {
1937 .pctlops = &tz1090_pinctrl_ops,
1938 .pmxops = &tz1090_pinmux_ops,
1939 .confops = &tz1090_pinconf_ops,
1940 .owner = THIS_MODULE,
1941 };
1942
tz1090_pinctrl_probe(struct platform_device * pdev)1943 static int tz1090_pinctrl_probe(struct platform_device *pdev)
1944 {
1945 struct tz1090_pmx *pmx;
1946 struct resource *res;
1947
1948 pmx = devm_kzalloc(&pdev->dev, sizeof(*pmx), GFP_KERNEL);
1949 if (!pmx) {
1950 dev_err(&pdev->dev, "Can't alloc tz1090_pmx\n");
1951 return -ENOMEM;
1952 }
1953 pmx->dev = &pdev->dev;
1954 spin_lock_init(&pmx->lock);
1955
1956 tz1090_pinctrl_desc.name = dev_name(&pdev->dev);
1957 tz1090_pinctrl_desc.pins = tz1090_pins;
1958 tz1090_pinctrl_desc.npins = ARRAY_SIZE(tz1090_pins);
1959
1960 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1961 pmx->regs = devm_ioremap_resource(&pdev->dev, res);
1962 if (IS_ERR(pmx->regs))
1963 return PTR_ERR(pmx->regs);
1964
1965 pmx->pctl = pinctrl_register(&tz1090_pinctrl_desc, &pdev->dev, pmx);
1966 if (!pmx->pctl) {
1967 dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
1968 return -ENODEV;
1969 }
1970
1971 platform_set_drvdata(pdev, pmx);
1972
1973 dev_info(&pdev->dev, "TZ1090 pinctrl driver initialised\n");
1974
1975 return 0;
1976 }
1977
tz1090_pinctrl_remove(struct platform_device * pdev)1978 static int tz1090_pinctrl_remove(struct platform_device *pdev)
1979 {
1980 struct tz1090_pmx *pmx = platform_get_drvdata(pdev);
1981
1982 pinctrl_unregister(pmx->pctl);
1983
1984 return 0;
1985 }
1986
1987 static struct of_device_id tz1090_pinctrl_of_match[] = {
1988 { .compatible = "img,tz1090-pinctrl", },
1989 { },
1990 };
1991
1992 static struct platform_driver tz1090_pinctrl_driver = {
1993 .driver = {
1994 .name = "tz1090-pinctrl",
1995 .owner = THIS_MODULE,
1996 .of_match_table = tz1090_pinctrl_of_match,
1997 },
1998 .probe = tz1090_pinctrl_probe,
1999 .remove = tz1090_pinctrl_remove,
2000 };
2001
tz1090_pinctrl_init(void)2002 static int __init tz1090_pinctrl_init(void)
2003 {
2004 tz1090_init_mux_pins();
2005 return platform_driver_register(&tz1090_pinctrl_driver);
2006 }
2007 arch_initcall(tz1090_pinctrl_init);
2008
tz1090_pinctrl_exit(void)2009 static void __exit tz1090_pinctrl_exit(void)
2010 {
2011 platform_driver_unregister(&tz1090_pinctrl_driver);
2012 }
2013 module_exit(tz1090_pinctrl_exit);
2014
2015 MODULE_AUTHOR("Imagination Technologies Ltd.");
2016 MODULE_DESCRIPTION("Toumaz Xenif TZ1090 pinctrl driver");
2017 MODULE_LICENSE("GPL v2");
2018 MODULE_DEVICE_TABLE(of, tz1090_pinctrl_of_match);
2019