2 * U-Boot Marvell 37xx SoC pinctrl driver
4 * Copyright (C) 2017 Stefan Roese <sr@denx.de>
6 * This driver is based on the Linux driver version, which is:
7 * Copyright (C) 2017 Marvell
8 * Gregory CLEMENT <gregory.clement@free-electrons.com>
10 * Additionally parts are derived from the Meson U-Boot pinctrl driver,
12 * (C) Copyright 2016 - Beniamino Galvani <b.galvani@gmail.com>
13 * Based on code from Linux kernel:
14 * Copyright (C) 2016 Endless Mobile, Inc.
16 * SPDX-License-Identifier: GPL-2.0+
17 * https://spdx.org/licenses
23 #include <dm/device-internal.h>
25 #include <dm/pinctrl.h>
31 #include <asm/system.h>
34 DECLARE_GLOBAL_DATA_PTR
;
37 #define INPUT_VAL 0x10
38 #define OUTPUT_VAL 0x18
39 #define OUTPUT_CTL 0x20
40 #define SELECTION 0x30
44 #define IRQ_STATUS 0x10
48 #define GPIO_PER_REG 32
51 * struct armada_37xx_pin_group: represents group of pins of a pinmux function.
52 * The pins of a pinmux groups are composed of one or two groups of contiguous
54 * @name: Name of the pin group, used to lookup the group.
55 * @start_pins: Index of the first pin of the main range of pins belonging to
57 * @npins: Number of pins included in the first range
58 * @reg_mask: Bit mask matching the group in the selection register
59 * @extra_pins: Index of the first pin of the optional second range of pins
60 * belonging to the group
61 * @npins: Number of pins included in the second optional range
62 * @funcs: A list of pinmux functions that can be selected for this group.
63 * @pins: List of the pins included in the group
65 struct armada_37xx_pin_group
{
67 unsigned int start_pin
;
71 unsigned int extra_pin
;
72 unsigned int extra_npins
;
73 const char *funcs
[NB_FUNCS
];
77 struct armada_37xx_pin_data
{
80 struct armada_37xx_pin_group
*groups
;
84 struct armada_37xx_pmx_func
{
90 struct armada_37xx_pinctrl
{
92 const struct armada_37xx_pin_data
*data
;
94 struct pinctrl_dev
*pctl_dev
;
95 struct armada_37xx_pin_group
*groups
;
97 struct armada_37xx_pmx_func
*funcs
;
101 #define PIN_GRP(_name, _start, _nr, _mask, _func1, _func2) \
104 .start_pin = _start, \
108 .funcs = {_func1, _func2} \
111 #define PIN_GRP_GPIO(_name, _start, _nr, _mask, _func1) \
114 .start_pin = _start, \
118 .funcs = {_func1, "gpio"} \
121 #define PIN_GRP_GPIO_2(_name, _start, _nr, _mask, _val1, _val2, _func1) \
124 .start_pin = _start, \
127 .val = {_val1, _val2}, \
128 .funcs = {_func1, "gpio"} \
131 #define PIN_GRP_EXTRA(_name, _start, _nr, _mask, _v1, _v2, _start2, _nr2, \
135 .start_pin = _start, \
139 .extra_pin = _start2, \
140 .extra_npins = _nr2, \
141 .funcs = {_f1, _f2} \
144 static struct armada_37xx_pin_group armada_37xx_nb_groups
[] = {
145 PIN_GRP_GPIO("jtag", 20, 5, BIT(0), "jtag"),
146 PIN_GRP_GPIO("sdio0", 8, 3, BIT(1), "sdio"),
147 PIN_GRP_GPIO("emmc_nb", 27, 9, BIT(2), "emmc"),
148 PIN_GRP_GPIO("pwm0", 11, 1, BIT(3), "pwm"),
149 PIN_GRP_GPIO("pwm1", 12, 1, BIT(4), "pwm"),
150 PIN_GRP_GPIO("pwm2", 13, 1, BIT(5), "pwm"),
151 PIN_GRP_GPIO("pwm3", 14, 1, BIT(6), "pwm"),
152 PIN_GRP_GPIO("pmic1", 17, 1, BIT(7), "pmic"),
153 PIN_GRP_GPIO("pmic0", 16, 1, BIT(8), "pmic"),
154 PIN_GRP_GPIO("i2c2", 2, 2, BIT(9), "i2c"),
155 PIN_GRP_GPIO("i2c1", 0, 2, BIT(10), "i2c"),
156 PIN_GRP_GPIO("spi_cs1", 17, 1, BIT(12), "spi"),
157 PIN_GRP_GPIO_2("spi_cs2", 18, 1, BIT(13) | BIT(19), 0, BIT(13), "spi"),
158 PIN_GRP_GPIO_2("spi_cs3", 19, 1, BIT(14) | BIT(19), 0, BIT(14), "spi"),
159 PIN_GRP_GPIO("onewire", 4, 1, BIT(16), "onewire"),
160 PIN_GRP_GPIO("uart1", 25, 2, BIT(17), "uart"),
161 PIN_GRP_GPIO("spi_quad", 15, 2, BIT(18), "spi"),
162 PIN_GRP_EXTRA("uart2", 9, 2, BIT(1) | BIT(13) | BIT(14) | BIT(19),
163 BIT(1) | BIT(13) | BIT(14), BIT(1) | BIT(19),
164 18, 2, "gpio", "uart"),
165 PIN_GRP_GPIO("led0_od", 11, 1, BIT(20), "led"),
166 PIN_GRP_GPIO("led1_od", 12, 1, BIT(21), "led"),
167 PIN_GRP_GPIO("led2_od", 13, 1, BIT(22), "led"),
168 PIN_GRP_GPIO("led3_od", 14, 1, BIT(23), "led"),
172 static struct armada_37xx_pin_group armada_37xx_sb_groups
[] = {
173 PIN_GRP_GPIO("usb32_drvvbus0", 0, 1, BIT(0), "drvbus"),
174 PIN_GRP_GPIO("usb2_drvvbus1", 1, 1, BIT(1), "drvbus"),
175 PIN_GRP_GPIO("sdio_sb", 24, 5, BIT(2), "sdio"),
176 PIN_GRP_EXTRA("rgmii", 6, 14, BIT(3), 0, BIT(3), 23, 1, "mii", "gpio"),
177 PIN_GRP_GPIO("pcie1", 3, 2, BIT(4), "pcie"),
178 PIN_GRP_GPIO("ptp", 20, 3, BIT(5), "ptp"),
179 PIN_GRP("ptp_clk", 21, 1, BIT(6), "ptp", "mii"),
180 PIN_GRP("ptp_trig", 22, 1, BIT(7), "ptp", "mii"),
181 PIN_GRP("mii_col", 23, 1, BIT(8), "mii", "mii_err"),
184 const struct armada_37xx_pin_data armada_37xx_pin_nb
= {
187 .groups
= armada_37xx_nb_groups
,
188 .ngroups
= ARRAY_SIZE(armada_37xx_nb_groups
),
191 const struct armada_37xx_pin_data armada_37xx_pin_sb
= {
194 .groups
= armada_37xx_sb_groups
,
195 .ngroups
= ARRAY_SIZE(armada_37xx_sb_groups
),
198 static inline void armada_37xx_update_reg(unsigned int *reg
,
201 /* We never have more than 2 registers */
202 if (offset
>= GPIO_PER_REG
) {
203 offset
-= GPIO_PER_REG
;
208 static int armada_37xx_get_func_reg(struct armada_37xx_pin_group
*grp
,
213 for (f
= 0; f
< NB_FUNCS
; f
++)
214 if (!strcmp(grp
->funcs
[f
], func
))
220 static int armada_37xx_pmx_get_groups_count(struct udevice
*dev
)
222 struct armada_37xx_pinctrl
*info
= dev_get_priv(dev
);
224 return info
->ngroups
;
227 static const char *armada_37xx_pmx_dummy_name
= "_dummy";
229 static const char *armada_37xx_pmx_get_group_name(struct udevice
*dev
,
232 struct armada_37xx_pinctrl
*info
= dev_get_priv(dev
);
234 if (!info
->groups
[selector
].name
)
235 return armada_37xx_pmx_dummy_name
;
237 return info
->groups
[selector
].name
;
240 static int armada_37xx_pmx_get_funcs_count(struct udevice
*dev
)
242 struct armada_37xx_pinctrl
*info
= dev_get_priv(dev
);
247 static const char *armada_37xx_pmx_get_func_name(struct udevice
*dev
,
250 struct armada_37xx_pinctrl
*info
= dev_get_priv(dev
);
252 return info
->funcs
[selector
].name
;
255 static int armada_37xx_pmx_set_by_name(struct udevice
*dev
,
257 struct armada_37xx_pin_group
*grp
)
259 struct armada_37xx_pinctrl
*info
= dev_get_priv(dev
);
260 unsigned int reg
= SELECTION
;
261 unsigned int mask
= grp
->reg_mask
;
264 dev_dbg(info
->dev
, "enable function %s group %s\n",
267 func
= armada_37xx_get_func_reg(grp
, name
);
272 val
= grp
->val
[func
];
274 clrsetbits_le32(info
->base
+ reg
, mask
, val
);
279 static int armada_37xx_pmx_group_set(struct udevice
*dev
,
280 unsigned group_selector
,
281 unsigned func_selector
)
283 struct armada_37xx_pinctrl
*info
= dev_get_priv(dev
);
284 struct armada_37xx_pin_group
*grp
= &info
->groups
[group_selector
];
285 const char *name
= info
->funcs
[func_selector
].name
;
287 return armada_37xx_pmx_set_by_name(dev
, name
, grp
);
291 * armada_37xx_add_function() - Add a new function to the list
292 * @funcs: array of function to add the new one
293 * @funcsize: size of the remaining space for the function
294 * @name: name of the function to add
296 * If it is a new function then create it by adding its name else
297 * increment the number of group associated to this function.
299 static int armada_37xx_add_function(struct armada_37xx_pmx_func
*funcs
,
300 int *funcsize
, const char *name
)
307 while (funcs
->ngroups
) {
308 /* function already there */
309 if (strcmp(funcs
->name
, name
) == 0) {
318 /* append new unique function */
327 * armada_37xx_fill_group() - complete the group array
328 * @info: info driver instance
330 * Based on the data available from the armada_37xx_pin_group array
331 * completes the last member of the struct for each function: the list
332 * of the groups associated to this function.
335 static int armada_37xx_fill_group(struct armada_37xx_pinctrl
*info
)
337 int n
, num
= 0, funcsize
= info
->data
->nr_pins
;
339 for (n
= 0; n
< info
->ngroups
; n
++) {
340 struct armada_37xx_pin_group
*grp
= &info
->groups
[n
];
343 grp
->pins
= devm_kzalloc(info
->dev
,
344 (grp
->npins
+ grp
->extra_npins
) *
345 sizeof(*grp
->pins
), GFP_KERNEL
);
349 for (i
= 0; i
< grp
->npins
; i
++)
350 grp
->pins
[i
] = grp
->start_pin
+ i
;
352 for (j
= 0; j
< grp
->extra_npins
; j
++)
353 grp
->pins
[i
+j
] = grp
->extra_pin
+ j
;
355 for (f
= 0; f
< NB_FUNCS
; f
++) {
357 /* check for unique functions and count groups */
358 ret
= armada_37xx_add_function(info
->funcs
, &funcsize
,
360 if (ret
== -EOVERFLOW
)
362 "More functions than pins(%d)\n",
363 info
->data
->nr_pins
);
376 * armada_37xx_fill_funcs() - complete the funcs array
377 * @info: info driver instance
379 * Based on the data available from the armada_37xx_pin_group array
380 * completes the last two member of the struct for each group:
381 * - the list of the pins included in the group
382 * - the list of pinmux functions that can be selected for this group
385 static int armada_37xx_fill_func(struct armada_37xx_pinctrl
*info
)
387 struct armada_37xx_pmx_func
*funcs
= info
->funcs
;
390 for (n
= 0; n
< info
->nfuncs
; n
++) {
391 const char *name
= funcs
[n
].name
;
395 funcs
[n
].groups
= devm_kzalloc(info
->dev
, funcs
[n
].ngroups
*
396 sizeof(*(funcs
[n
].groups
)),
398 if (!funcs
[n
].groups
)
401 groups
= funcs
[n
].groups
;
403 for (g
= 0; g
< info
->ngroups
; g
++) {
404 struct armada_37xx_pin_group
*gp
= &info
->groups
[g
];
407 for (f
= 0; f
< NB_FUNCS
; f
++) {
408 if (strcmp(gp
->funcs
[f
], name
) == 0) {
418 static int armada_37xx_gpio_get(struct udevice
*dev
, unsigned int offset
)
420 struct armada_37xx_pinctrl
*info
= dev_get_priv(dev
->parent
);
421 unsigned int reg
= INPUT_VAL
;
422 unsigned int val
, mask
;
424 armada_37xx_update_reg(®
, offset
);
427 val
= readl(info
->base
+ reg
);
429 return (val
& mask
) != 0;
432 static int armada_37xx_gpio_set(struct udevice
*dev
, unsigned int offset
,
435 struct armada_37xx_pinctrl
*info
= dev_get_priv(dev
->parent
);
436 unsigned int reg
= OUTPUT_VAL
;
437 unsigned int mask
, val
;
439 armada_37xx_update_reg(®
, offset
);
441 val
= value
? mask
: 0;
443 clrsetbits_le32(info
->base
+ reg
, mask
, val
);
448 static int armada_37xx_gpio_get_direction(struct udevice
*dev
,
451 struct armada_37xx_pinctrl
*info
= dev_get_priv(dev
->parent
);
452 unsigned int reg
= OUTPUT_EN
;
453 unsigned int val
, mask
;
455 armada_37xx_update_reg(®
, offset
);
457 val
= readl(info
->base
+ reg
);
465 static int armada_37xx_gpio_direction_input(struct udevice
*dev
,
468 struct armada_37xx_pinctrl
*info
= dev_get_priv(dev
->parent
);
469 unsigned int reg
= OUTPUT_EN
;
472 armada_37xx_update_reg(®
, offset
);
475 clrbits_le32(info
->base
+ reg
, mask
);
480 static int armada_37xx_gpio_direction_output(struct udevice
*dev
,
481 unsigned int offset
, int value
)
483 struct armada_37xx_pinctrl
*info
= dev_get_priv(dev
->parent
);
484 unsigned int reg
= OUTPUT_EN
;
487 armada_37xx_update_reg(®
, offset
);
490 setbits_le32(info
->base
+ reg
, mask
);
492 /* And set the requested value */
493 return armada_37xx_gpio_set(dev
, offset
, value
);
496 static int armada_37xx_gpio_probe(struct udevice
*dev
)
498 struct armada_37xx_pinctrl
*info
= dev_get_priv(dev
->parent
);
499 struct gpio_dev_priv
*uc_priv
;
501 uc_priv
= dev_get_uclass_priv(dev
);
502 uc_priv
->bank_name
= info
->data
->name
;
503 uc_priv
->gpio_count
= info
->data
->nr_pins
;
508 static const struct dm_gpio_ops armada_37xx_gpio_ops
= {
509 .set_value
= armada_37xx_gpio_set
,
510 .get_value
= armada_37xx_gpio_get
,
511 .get_function
= armada_37xx_gpio_get_direction
,
512 .direction_input
= armada_37xx_gpio_direction_input
,
513 .direction_output
= armada_37xx_gpio_direction_output
,
516 static struct driver armada_37xx_gpio_driver
= {
517 .name
= "armada-37xx-gpio",
519 .probe
= armada_37xx_gpio_probe
,
520 .ops
= &armada_37xx_gpio_ops
,
523 static int armada_37xx_gpiochip_register(struct udevice
*parent
,
524 struct armada_37xx_pinctrl
*info
)
526 const void *blob
= gd
->fdt_blob
;
527 int node
= dev_of_offset(parent
);
528 struct uclass_driver
*drv
;
534 /* Lookup GPIO driver */
535 drv
= lists_uclass_lookup(UCLASS_GPIO
);
537 puts("Cannot find GPIO driver\n");
541 fdt_for_each_subnode(subnode
, blob
, node
) {
542 if (fdtdec_get_bool(blob
, subnode
, "gpio-controller")) {
550 name
= calloc(1, 32);
551 sprintf(name
, "armada-37xx-gpio");
553 /* Create child device UCLASS_GPIO and bind it */
554 device_bind(parent
, &armada_37xx_gpio_driver
, name
, NULL
, subnode
,
556 dev_set_of_offset(dev
, subnode
);
561 const struct pinctrl_ops armada_37xx_pinctrl_ops
= {
562 .get_groups_count
= armada_37xx_pmx_get_groups_count
,
563 .get_group_name
= armada_37xx_pmx_get_group_name
,
564 .get_functions_count
= armada_37xx_pmx_get_funcs_count
,
565 .get_function_name
= armada_37xx_pmx_get_func_name
,
566 .pinmux_group_set
= armada_37xx_pmx_group_set
,
567 .set_state
= pinctrl_generic_set_state
,
570 int armada_37xx_pinctrl_probe(struct udevice
*dev
)
572 struct armada_37xx_pinctrl
*info
= dev_get_priv(dev
);
573 const struct armada_37xx_pin_data
*pin_data
;
576 info
->data
= (struct armada_37xx_pin_data
*)dev_get_driver_data(dev
);
577 pin_data
= info
->data
;
579 info
->base
= (void __iomem
*)devfdt_get_addr(dev
);
581 pr_err("unable to find regmap\n");
585 info
->groups
= pin_data
->groups
;
586 info
->ngroups
= pin_data
->ngroups
;
589 * we allocate functions for number of pins and hope there are
590 * fewer unique functions than pins available
592 info
->funcs
= devm_kzalloc(info
->dev
, pin_data
->nr_pins
*
593 sizeof(struct armada_37xx_pmx_func
), GFP_KERNEL
);
598 ret
= armada_37xx_fill_group(info
);
602 ret
= armada_37xx_fill_func(info
);
606 ret
= armada_37xx_gpiochip_register(dev
, info
);
613 static const struct udevice_id armada_37xx_pinctrl_of_match
[] = {
615 .compatible
= "marvell,armada3710-sb-pinctrl",
616 .data
= (ulong
)&armada_37xx_pin_sb
,
619 .compatible
= "marvell,armada3710-nb-pinctrl",
620 .data
= (ulong
)&armada_37xx_pin_nb
,
625 U_BOOT_DRIVER(armada_37xx_pinctrl
) = {
626 .name
= "armada-37xx-pinctrl",
627 .id
= UCLASS_PINCTRL
,
628 .of_match
= of_match_ptr(armada_37xx_pinctrl_of_match
),
629 .probe
= armada_37xx_pinctrl_probe
,
630 .priv_auto_alloc_size
= sizeof(struct armada_37xx_pinctrl
),
631 .ops
= &armada_37xx_pinctrl_ops
,