u-boot/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

643 lines
16 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* U-Boot Marvell 37xx SoC pinctrl driver
*
* Copyright (C) 2017 Stefan Roese <sr@denx.de>
*
* This driver is based on the Linux driver version, which is:
* Copyright (C) 2017 Marvell
* Gregory CLEMENT <gregory.clement@free-electrons.com>
*
* Additionally parts are derived from the Meson U-Boot pinctrl driver,
* which is:
* (C) Copyright 2016 - Beniamino Galvani <b.galvani@gmail.com>
* Based on code from Linux kernel:
* Copyright (C) 2016 Endless Mobile, Inc.
* https://spdx.org/licenses
*/
#include <common.h>
#include <config.h>
#include <dm.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/pinctrl.h>
#include <dm/root.h>
#include <errno.h>
#include <fdtdec.h>
#include <regmap.h>
#include <asm/gpio.h>
#include <asm/system.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
#define OUTPUT_EN 0x0
#define INPUT_VAL 0x10
#define OUTPUT_VAL 0x18
#define OUTPUT_CTL 0x20
#define SELECTION 0x30
#define IRQ_EN 0x0
#define IRQ_POL 0x08
#define IRQ_STATUS 0x10
#define IRQ_WKUP 0x18
#define NB_FUNCS 3
#define GPIO_PER_REG 32
/**
* struct armada_37xx_pin_group: represents group of pins of a pinmux function.
* The pins of a pinmux groups are composed of one or two groups of contiguous
* pins.
* @name: Name of the pin group, used to lookup the group.
* @start_pins: Index of the first pin of the main range of pins belonging to
* the group
* @npins: Number of pins included in the first range
* @reg_mask: Bit mask matching the group in the selection register
* @extra_pins: Index of the first pin of the optional second range of pins
* belonging to the group
* @npins: Number of pins included in the second optional range
* @funcs: A list of pinmux functions that can be selected for this group.
* @pins: List of the pins included in the group
*/
struct armada_37xx_pin_group {
const char *name;
unsigned int start_pin;
unsigned int npins;
u32 reg_mask;
u32 val[NB_FUNCS];
unsigned int extra_pin;
unsigned int extra_npins;
const char *funcs[NB_FUNCS];
unsigned int *pins;
};
struct armada_37xx_pin_data {
u8 nr_pins;
char *name;
struct armada_37xx_pin_group *groups;
int ngroups;
};
struct armada_37xx_pmx_func {
const char *name;
const char **groups;
unsigned int ngroups;
};
struct armada_37xx_pinctrl {
void __iomem *base;
const struct armada_37xx_pin_data *data;
struct udevice *dev;
struct pinctrl_dev *pctl_dev;
struct armada_37xx_pin_group *groups;
unsigned int ngroups;
struct armada_37xx_pmx_func *funcs;
unsigned int nfuncs;
};
#define PIN_GRP(_name, _start, _nr, _mask, _func1, _func2) \
{ \
.name = _name, \
.start_pin = _start, \
.npins = _nr, \
.reg_mask = _mask, \
.val = {0, _mask}, \
.funcs = {_func1, _func2} \
}
#define PIN_GRP_GPIO(_name, _start, _nr, _mask, _func1) \
{ \
.name = _name, \
.start_pin = _start, \
.npins = _nr, \
.reg_mask = _mask, \
.val = {0, _mask}, \
.funcs = {_func1, "gpio"} \
}
#define PIN_GRP_GPIO_2(_name, _start, _nr, _mask, _val1, _val2, _func1) \
{ \
.name = _name, \
.start_pin = _start, \
.npins = _nr, \
.reg_mask = _mask, \
.val = {_val1, _val2}, \
.funcs = {_func1, "gpio"} \
}
#define PIN_GRP_GPIO_3(_name, _start, _nr, _mask, _v1, _v2, _v3, _f1, _f2) \
{ \
.name = _name, \
.start_pin = _start, \
.npins = _nr, \
.reg_mask = _mask, \
.val = {_v1, _v2, _v3}, \
.funcs = {_f1, _f2, "gpio"} \
}
#define PIN_GRP_EXTRA(_name, _start, _nr, _mask, _v1, _v2, _start2, _nr2, \
_f1, _f2) \
{ \
.name = _name, \
.start_pin = _start, \
.npins = _nr, \
.reg_mask = _mask, \
.val = {_v1, _v2}, \
.extra_pin = _start2, \
.extra_npins = _nr2, \
.funcs = {_f1, _f2} \
}
static struct armada_37xx_pin_group armada_37xx_nb_groups[] = {
PIN_GRP_GPIO("jtag", 20, 5, BIT(0), "jtag"),
PIN_GRP_GPIO("sdio0", 8, 3, BIT(1), "sdio"),
PIN_GRP_GPIO("emmc_nb", 27, 9, BIT(2), "emmc"),
PIN_GRP_GPIO("pwm0", 11, 1, BIT(3), "pwm"),
PIN_GRP_GPIO("pwm1", 12, 1, BIT(4), "pwm"),
PIN_GRP_GPIO("pwm2", 13, 1, BIT(5), "pwm"),
PIN_GRP_GPIO("pwm3", 14, 1, BIT(6), "pwm"),
PIN_GRP_GPIO("pmic1", 7, 1, BIT(7), "pmic"),
PIN_GRP_GPIO("pmic0", 6, 1, BIT(8), "pmic"),
PIN_GRP_GPIO("i2c2", 2, 2, BIT(9), "i2c"),
PIN_GRP_GPIO("i2c1", 0, 2, BIT(10), "i2c"),
PIN_GRP_GPIO("spi_cs1", 17, 1, BIT(12), "spi"),
PIN_GRP_GPIO_2("spi_cs2", 18, 1, BIT(13) | BIT(19), 0, BIT(13), "spi"),
PIN_GRP_GPIO_2("spi_cs3", 19, 1, BIT(14) | BIT(19), 0, BIT(14), "spi"),
PIN_GRP_GPIO("onewire", 4, 1, BIT(16), "onewire"),
PIN_GRP_GPIO("uart1", 25, 2, BIT(17), "uart"),
PIN_GRP_GPIO("spi_quad", 15, 2, BIT(18), "spi"),
PIN_GRP_EXTRA("uart2", 9, 2, BIT(1) | BIT(13) | BIT(14) | BIT(19),
BIT(1) | BIT(13) | BIT(14), BIT(1) | BIT(19),
18, 2, "gpio", "uart"),
PIN_GRP_GPIO("led0_od", 11, 1, BIT(20), "led"),
PIN_GRP_GPIO("led1_od", 12, 1, BIT(21), "led"),
PIN_GRP_GPIO("led2_od", 13, 1, BIT(22), "led"),
PIN_GRP_GPIO("led3_od", 14, 1, BIT(23), "led"),
};
static struct armada_37xx_pin_group armada_37xx_sb_groups[] = {
PIN_GRP_GPIO("usb32_drvvbus0", 0, 1, BIT(0), "drvbus"),
PIN_GRP_GPIO("usb2_drvvbus1", 1, 1, BIT(1), "drvbus"),
PIN_GRP_GPIO("sdio_sb", 24, 6, BIT(2), "sdio"),
PIN_GRP_GPIO("rgmii", 6, 12, BIT(3), "mii"),
PIN_GRP_GPIO("smi", 18, 2, BIT(4), "smi"),
PIN_GRP_GPIO("pcie1", 3, 3, BIT(5) | BIT(9) | BIT(10), "pcie"),
PIN_GRP_GPIO("ptp", 20, 3, BIT(11) | BIT(12) | BIT(13), "ptp"),
PIN_GRP("ptp_clk", 21, 1, BIT(6), "ptp", "mii"),
PIN_GRP("ptp_trig", 22, 1, BIT(7), "ptp", "mii"),
PIN_GRP_GPIO_3("mii_col", 23, 1, BIT(8) | BIT(14), 0, BIT(8), BIT(14),
"mii", "mii_err"),
};
const struct armada_37xx_pin_data armada_37xx_pin_nb = {
.nr_pins = 36,
.name = "GPIO1",
.groups = armada_37xx_nb_groups,
.ngroups = ARRAY_SIZE(armada_37xx_nb_groups),
};
const struct armada_37xx_pin_data armada_37xx_pin_sb = {
.nr_pins = 30,
.name = "GPIO2",
.groups = armada_37xx_sb_groups,
.ngroups = ARRAY_SIZE(armada_37xx_sb_groups),
};
static inline void armada_37xx_update_reg(unsigned int *reg,
unsigned int *offset)
{
/* We never have more than 2 registers */
if (*offset >= GPIO_PER_REG) {
*offset -= GPIO_PER_REG;
*reg += sizeof(u32);
}
}
static int armada_37xx_get_func_reg(struct armada_37xx_pin_group *grp,
const char *func)
{
int f;
for (f = 0; (f < NB_FUNCS) && grp->funcs[f]; f++)
if (!strcmp(grp->funcs[f], func))
return f;
return -ENOTSUPP;
}
static int armada_37xx_pmx_get_groups_count(struct udevice *dev)
{
struct armada_37xx_pinctrl *info = dev_get_priv(dev);
return info->ngroups;
}
static const char *armada_37xx_pmx_dummy_name = "_dummy";
static const char *armada_37xx_pmx_get_group_name(struct udevice *dev,
unsigned selector)
{
struct armada_37xx_pinctrl *info = dev_get_priv(dev);
if (!info->groups[selector].name)
return armada_37xx_pmx_dummy_name;
return info->groups[selector].name;
}
static int armada_37xx_pmx_get_funcs_count(struct udevice *dev)
{
struct armada_37xx_pinctrl *info = dev_get_priv(dev);
return info->nfuncs;
}
static const char *armada_37xx_pmx_get_func_name(struct udevice *dev,
unsigned selector)
{
struct armada_37xx_pinctrl *info = dev_get_priv(dev);
return info->funcs[selector].name;
}
static int armada_37xx_pmx_set_by_name(struct udevice *dev,
const char *name,
struct armada_37xx_pin_group *grp)
{
struct armada_37xx_pinctrl *info = dev_get_priv(dev);
unsigned int reg = SELECTION;
unsigned int mask = grp->reg_mask;
int func, val;
dev_dbg(info->dev, "enable function %s group %s\n",
name, grp->name);
func = armada_37xx_get_func_reg(grp, name);
if (func < 0)
return func;
val = grp->val[func];
clrsetbits_le32(info->base + reg, mask, val);
return 0;
}
static int armada_37xx_pmx_group_set(struct udevice *dev,
unsigned group_selector,
unsigned func_selector)
{
struct armada_37xx_pinctrl *info = dev_get_priv(dev);
struct armada_37xx_pin_group *grp = &info->groups[group_selector];
const char *name = info->funcs[func_selector].name;
return armada_37xx_pmx_set_by_name(dev, name, grp);
}
/**
* armada_37xx_add_function() - Add a new function to the list
* @funcs: array of function to add the new one
* @funcsize: size of the remaining space for the function
* @name: name of the function to add
*
* If it is a new function then create it by adding its name else
* increment the number of group associated to this function.
*/
static int armada_37xx_add_function(struct armada_37xx_pmx_func *funcs,
int *funcsize, const char *name)
{
int i = 0;
if (*funcsize <= 0)
return -EOVERFLOW;
while (funcs->ngroups) {
/* function already there */
if (strcmp(funcs->name, name) == 0) {
funcs->ngroups++;
return -EEXIST;
}
funcs++;
i++;
}
/* append new unique function */
funcs->name = name;
funcs->ngroups = 1;
(*funcsize)--;
return 0;
}
/**
* armada_37xx_fill_group() - complete the group array
* @info: info driver instance
*
* Based on the data available from the armada_37xx_pin_group array
* completes the last member of the struct for each function: the list
* of the groups associated to this function.
*
*/
static int armada_37xx_fill_group(struct armada_37xx_pinctrl *info)
{
int n, num = 0, funcsize = info->data->nr_pins;
for (n = 0; n < info->ngroups; n++) {
struct armada_37xx_pin_group *grp = &info->groups[n];
int i, j, f;
grp->pins = devm_kzalloc(info->dev,
(grp->npins + grp->extra_npins) *
sizeof(*grp->pins), GFP_KERNEL);
if (!grp->pins)
return -ENOMEM;
for (i = 0; i < grp->npins; i++)
grp->pins[i] = grp->start_pin + i;
for (j = 0; j < grp->extra_npins; j++)
grp->pins[i+j] = grp->extra_pin + j;
for (f = 0; (f < NB_FUNCS) && grp->funcs[f]; f++) {
int ret;
/* check for unique functions and count groups */
ret = armada_37xx_add_function(info->funcs, &funcsize,
grp->funcs[f]);
if (ret == -EOVERFLOW)
dev_err(info->dev,
"More functions than pins(%d)\n",
info->data->nr_pins);
if (ret < 0)
continue;
num++;
}
}
info->nfuncs = num;
return 0;
}
/**
* armada_37xx_fill_funcs() - complete the funcs array
* @info: info driver instance
*
* Based on the data available from the armada_37xx_pin_group array
* completes the last two member of the struct for each group:
* - the list of the pins included in the group
* - the list of pinmux functions that can be selected for this group
*
*/
static int armada_37xx_fill_func(struct armada_37xx_pinctrl *info)
{
struct armada_37xx_pmx_func *funcs = info->funcs;
int n;
for (n = 0; n < info->nfuncs; n++) {
const char *name = funcs[n].name;
const char **groups;
int g;
funcs[n].groups = devm_kzalloc(info->dev, funcs[n].ngroups *
sizeof(*(funcs[n].groups)),
GFP_KERNEL);
if (!funcs[n].groups)
return -ENOMEM;
groups = funcs[n].groups;
for (g = 0; g < info->ngroups; g++) {
struct armada_37xx_pin_group *gp = &info->groups[g];
int f;
for (f = 0; (f < NB_FUNCS) && gp->funcs[f]; f++) {
if (strcmp(gp->funcs[f], name) == 0) {
*groups = gp->name;
groups++;
}
}
}
}
return 0;
}
static int armada_37xx_gpio_get(struct udevice *dev, unsigned int offset)
{
struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
unsigned int reg = INPUT_VAL;
unsigned int val, mask;
armada_37xx_update_reg(&reg, &offset);
mask = BIT(offset);
val = readl(info->base + reg);
return (val & mask) != 0;
}
static int armada_37xx_gpio_set(struct udevice *dev, unsigned int offset,
int value)
{
struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
unsigned int reg = OUTPUT_VAL;
unsigned int mask, val;
armada_37xx_update_reg(&reg, &offset);
mask = BIT(offset);
val = value ? mask : 0;
clrsetbits_le32(info->base + reg, mask, val);
return 0;
}
static int armada_37xx_gpio_get_direction(struct udevice *dev,
unsigned int offset)
{
struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
unsigned int reg = OUTPUT_EN;
unsigned int val, mask;
armada_37xx_update_reg(&reg, &offset);
mask = BIT(offset);
val = readl(info->base + reg);
if (val & mask)
return GPIOF_OUTPUT;
else
return GPIOF_INPUT;
}
static int armada_37xx_gpio_direction_input(struct udevice *dev,
unsigned int offset)
{
struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
unsigned int reg = OUTPUT_EN;
unsigned int mask;
armada_37xx_update_reg(&reg, &offset);
mask = BIT(offset);
clrbits_le32(info->base + reg, mask);
return 0;
}
static int armada_37xx_gpio_direction_output(struct udevice *dev,
unsigned int offset, int value)
{
struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
unsigned int reg = OUTPUT_EN;
unsigned int mask;
armada_37xx_update_reg(&reg, &offset);
mask = BIT(offset);
setbits_le32(info->base + reg, mask);
/* And set the requested value */
return armada_37xx_gpio_set(dev, offset, value);
}
static int armada_37xx_gpio_probe(struct udevice *dev)
{
struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
struct gpio_dev_priv *uc_priv;
uc_priv = dev_get_uclass_priv(dev);
uc_priv->bank_name = info->data->name;
uc_priv->gpio_count = info->data->nr_pins;
return 0;
}
static const struct dm_gpio_ops armada_37xx_gpio_ops = {
.set_value = armada_37xx_gpio_set,
.get_value = armada_37xx_gpio_get,
.get_function = armada_37xx_gpio_get_direction,
.direction_input = armada_37xx_gpio_direction_input,
.direction_output = armada_37xx_gpio_direction_output,
};
static struct driver armada_37xx_gpio_driver = {
.name = "armada-37xx-gpio",
.id = UCLASS_GPIO,
.probe = armada_37xx_gpio_probe,
.ops = &armada_37xx_gpio_ops,
};
static int armada_37xx_gpiochip_register(struct udevice *parent,
struct armada_37xx_pinctrl *info)
{
const void *blob = gd->fdt_blob;
int node = dev_of_offset(parent);
struct uclass_driver *drv;
struct udevice *dev;
int ret = -ENODEV;
int subnode;
char *name;
/* Lookup GPIO driver */
drv = lists_uclass_lookup(UCLASS_GPIO);
if (!drv) {
puts("Cannot find GPIO driver\n");
return -ENOENT;
}
fdt_for_each_subnode(subnode, blob, node) {
if (fdtdec_get_bool(blob, subnode, "gpio-controller")) {
ret = 0;
break;
}
};
if (ret)
return ret;
name = calloc(1, 32);
sprintf(name, "armada-37xx-gpio");
/* Create child device UCLASS_GPIO and bind it */
device_bind(parent, &armada_37xx_gpio_driver, name, NULL, subnode,
&dev);
dev_set_of_offset(dev, subnode);
return 0;
}
const struct pinctrl_ops armada_37xx_pinctrl_ops = {
.get_groups_count = armada_37xx_pmx_get_groups_count,
.get_group_name = armada_37xx_pmx_get_group_name,
.get_functions_count = armada_37xx_pmx_get_funcs_count,
.get_function_name = armada_37xx_pmx_get_func_name,
.pinmux_group_set = armada_37xx_pmx_group_set,
.set_state = pinctrl_generic_set_state,
};
int armada_37xx_pinctrl_probe(struct udevice *dev)
{
struct armada_37xx_pinctrl *info = dev_get_priv(dev);
const struct armada_37xx_pin_data *pin_data;
int ret;
info->data = (struct armada_37xx_pin_data *)dev_get_driver_data(dev);
pin_data = info->data;
info->base = (void __iomem *)devfdt_get_addr(dev);
if (!info->base) {
pr_err("unable to find regmap\n");
return -ENODEV;
}
info->groups = pin_data->groups;
info->ngroups = pin_data->ngroups;
/*
* we allocate functions for number of pins and hope there are
* fewer unique functions than pins available
*/
info->funcs = devm_kzalloc(info->dev, pin_data->nr_pins *
sizeof(struct armada_37xx_pmx_func), GFP_KERNEL);
if (!info->funcs)
return -ENOMEM;
ret = armada_37xx_fill_group(info);
if (ret)
return ret;
ret = armada_37xx_fill_func(info);
if (ret)
return ret;
ret = armada_37xx_gpiochip_register(dev, info);
if (ret)
return ret;
return 0;
}
static const struct udevice_id armada_37xx_pinctrl_of_match[] = {
{
.compatible = "marvell,armada3710-sb-pinctrl",
.data = (ulong)&armada_37xx_pin_sb,
},
{
.compatible = "marvell,armada3710-nb-pinctrl",
.data = (ulong)&armada_37xx_pin_nb,
},
{ /* sentinel */ }
};
U_BOOT_DRIVER(armada_37xx_pinctrl) = {
.name = "armada-37xx-pinctrl",
.id = UCLASS_PINCTRL,
.of_match = of_match_ptr(armada_37xx_pinctrl_of_match),
.probe = armada_37xx_pinctrl_probe,
.priv_auto_alloc_size = sizeof(struct armada_37xx_pinctrl),
.ops = &armada_37xx_pinctrl_ops,
};