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linux_dsm_epyc7002/drivers/pinctrl/mvebu/pinctrl-mvebu.c
Kees Cook a86854d0c5 treewide: devm_kzalloc() -> devm_kcalloc() 
The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc().
This patch replaces cases of:

        devm_kzalloc(handle, a * b, gfp)

with:
        devm_kcalloc(handle, a * b, gfp)

as well as handling cases of:

        devm_kzalloc(handle, a * b * c, gfp)

with:

        devm_kzalloc(handle, array3_size(a, b, c), gfp)

as it's slightly less ugly than:

        devm_kcalloc(handle, array_size(a, b), c, gfp)

This does, however, attempt to ignore constant size factors like:

        devm_kzalloc(handle, 4 * 1024, gfp)

though any constants defined via macros get caught up in the conversion.

Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.

Some manual whitespace fixes were needed in this patch, as Coccinelle
really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...".

The Coccinelle script used for this was:

// Fix redundant parens around sizeof().
@@
expression HANDLE;
type TYPE;
expression THING, E;
@@

(
  devm_kzalloc(HANDLE,
-	(sizeof(TYPE)) * E
+	sizeof(TYPE) * E
  , ...)
|
  devm_kzalloc(HANDLE,
-	(sizeof(THING)) * E
+	sizeof(THING) * E
  , ...)
)

// Drop single-byte sizes and redundant parens.
@@
expression HANDLE;
expression COUNT;
typedef u8;
typedef __u8;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(u8) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(__u8) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(char) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(unsigned char) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(u8) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(__u8) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(char) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(unsigned char) * COUNT
+	COUNT
  , ...)
)

// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
expression HANDLE;
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@

(
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (COUNT_ID)
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * COUNT_ID
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (COUNT_CONST)
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * COUNT_CONST
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (COUNT_ID)
+	COUNT_ID, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * COUNT_ID
+	COUNT_ID, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (COUNT_CONST)
+	COUNT_CONST, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * COUNT_CONST
+	COUNT_CONST, sizeof(THING)
  , ...)
)

// 2-factor product, only identifiers.
@@
expression HANDLE;
identifier SIZE, COUNT;
@@

- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	SIZE * COUNT
+	COUNT, SIZE
  , ...)

// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression HANDLE;
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
)

// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression HANDLE;
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
)

// 3-factor product, only identifiers, with redundant parens removed.
@@
expression HANDLE;
identifier STRIDE, SIZE, COUNT;
@@

(
  devm_kzalloc(HANDLE,
-	(COUNT) * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
)

// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression HANDLE;
expression E1, E2, E3;
constant C1, C2, C3;
@@

(
  devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * (E2) * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * (E2) * (E3)
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	E1 * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
)

// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression HANDLE;
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@

(
  devm_kzalloc(HANDLE, sizeof(THING) * C2, ...)
|
  devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...)
|
  devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
  devm_kzalloc(HANDLE, C1 * C2, ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (E2)
+	E2, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * E2
+	E2, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (E2)
+	E2, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * E2
+	E2, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	(E1) * E2
+	E1, E2
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	(E1) * (E2)
+	E1, E2
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	E1 * E2
+	E1, E2
  , ...)
)

Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 16:19:22 -07:00

841 lines
22 KiB
C
Raw Blame History

/*
* Marvell MVEBU pinctrl core driver
*
* Authors: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/pinctrl/machine.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include "pinctrl-mvebu.h"
#define MPPS_PER_REG 8
#define MPP_BITS 4
#define MPP_MASK 0xf
struct mvebu_pinctrl_function {
const char *name;
const char **groups;
unsigned num_groups;
};
struct mvebu_pinctrl_group {
const char *name;
const struct mvebu_mpp_ctrl *ctrl;
struct mvebu_mpp_ctrl_data *data;
struct mvebu_mpp_ctrl_setting *settings;
unsigned num_settings;
unsigned gid;
unsigned *pins;
unsigned npins;
};
struct mvebu_pinctrl {
struct device *dev;
struct pinctrl_dev *pctldev;
struct pinctrl_desc desc;
struct mvebu_pinctrl_group *groups;
unsigned num_groups;
struct mvebu_pinctrl_function *functions;
unsigned num_functions;
u8 variant;
};
int mvebu_mmio_mpp_ctrl_get(struct mvebu_mpp_ctrl_data *data,
unsigned int pid, unsigned long *config)
{
unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
*config = (readl(data->base + off) >> shift) & MVEBU_MPP_MASK;
return 0;
}
int mvebu_mmio_mpp_ctrl_set(struct mvebu_mpp_ctrl_data *data,
unsigned int pid, unsigned long config)
{
unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
unsigned long reg;
reg = readl(data->base + off) & ~(MVEBU_MPP_MASK << shift);
writel(reg | (config << shift), data->base + off);
return 0;
}
static struct mvebu_pinctrl_group *mvebu_pinctrl_find_group_by_pid(
struct mvebu_pinctrl *pctl, unsigned pid)
{
unsigned n;
for (n = 0; n < pctl->num_groups; n++) {
if (pid >= pctl->groups[n].pins[0] &&
pid < pctl->groups[n].pins[0] +
pctl->groups[n].npins)
return &pctl->groups[n];
}
return NULL;
}
static struct mvebu_pinctrl_group *mvebu_pinctrl_find_group_by_name(
struct mvebu_pinctrl *pctl, const char *name)
{
unsigned n;
for (n = 0; n < pctl->num_groups; n++) {
if (strcmp(name, pctl->groups[n].name) == 0)
return &pctl->groups[n];
}
return NULL;
}
static struct mvebu_mpp_ctrl_setting *mvebu_pinctrl_find_setting_by_val(
struct mvebu_pinctrl *pctl, struct mvebu_pinctrl_group *grp,
unsigned long config)
{
unsigned n;
for (n = 0; n < grp->num_settings; n++) {
if (config == grp->settings[n].val) {
if (!pctl->variant || (pctl->variant &
grp->settings[n].variant))
return &grp->settings[n];
}
}
return NULL;
}
static struct mvebu_mpp_ctrl_setting *mvebu_pinctrl_find_setting_by_name(
struct mvebu_pinctrl *pctl, struct mvebu_pinctrl_group *grp,
const char *name)
{
unsigned n;
for (n = 0; n < grp->num_settings; n++) {
if (strcmp(name, grp->settings[n].name) == 0) {
if (!pctl->variant || (pctl->variant &
grp->settings[n].variant))
return &grp->settings[n];
}
}
return NULL;
}
static struct mvebu_mpp_ctrl_setting *mvebu_pinctrl_find_gpio_setting(
struct mvebu_pinctrl *pctl, struct mvebu_pinctrl_group *grp)
{
unsigned n;
for (n = 0; n < grp->num_settings; n++) {
if (grp->settings[n].flags &
(MVEBU_SETTING_GPO | MVEBU_SETTING_GPI)) {
if (!pctl->variant || (pctl->variant &
grp->settings[n].variant))
return &grp->settings[n];
}
}
return NULL;
}
static struct mvebu_pinctrl_function *mvebu_pinctrl_find_function_by_name(
struct mvebu_pinctrl *pctl, const char *name)
{
unsigned n;
for (n = 0; n < pctl->num_functions; n++) {
if (strcmp(name, pctl->functions[n].name) == 0)
return &pctl->functions[n];
}
return NULL;
}
static int mvebu_pinconf_group_get(struct pinctrl_dev *pctldev,
unsigned gid, unsigned long *config)
{
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
struct mvebu_pinctrl_group *grp = &pctl->groups[gid];
if (!grp->ctrl)
return -EINVAL;
return grp->ctrl->mpp_get(grp->data, grp->pins[0], config);
}
static int mvebu_pinconf_group_set(struct pinctrl_dev *pctldev,
unsigned gid, unsigned long *configs,
unsigned num_configs)
{
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
struct mvebu_pinctrl_group *grp = &pctl->groups[gid];
int i, ret;
if (!grp->ctrl)
return -EINVAL;
for (i = 0; i < num_configs; i++) {
ret = grp->ctrl->mpp_set(grp->data, grp->pins[0], configs[i]);
if (ret)
return ret;
} /* for each config */
return 0;
}
static void mvebu_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
struct seq_file *s, unsigned gid)
{
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
struct mvebu_pinctrl_group *grp = &pctl->groups[gid];
struct mvebu_mpp_ctrl_setting *curr;
unsigned long config;
unsigned n;
if (mvebu_pinconf_group_get(pctldev, gid, &config))
return;
curr = mvebu_pinctrl_find_setting_by_val(pctl, grp, config);
if (curr) {
seq_printf(s, "current: %s", curr->name);
if (curr->subname)
seq_printf(s, "(%s)", curr->subname);
if (curr->flags & (MVEBU_SETTING_GPO | MVEBU_SETTING_GPI)) {
seq_putc(s, '(');
if (curr->flags & MVEBU_SETTING_GPI)
seq_putc(s, 'i');
if (curr->flags & MVEBU_SETTING_GPO)
seq_putc(s, 'o');
seq_putc(s, ')');
}
} else {
seq_puts(s, "current: UNKNOWN");
}
if (grp->num_settings > 1) {
seq_puts(s, ", available = [");
for (n = 0; n < grp->num_settings; n++) {
if (curr == &grp->settings[n])
continue;
/* skip unsupported settings for this variant */
if (pctl->variant &&
!(pctl->variant & grp->settings[n].variant))
continue;
seq_printf(s, " %s", grp->settings[n].name);
if (grp->settings[n].subname)
seq_printf(s, "(%s)", grp->settings[n].subname);
if (grp->settings[n].flags &
(MVEBU_SETTING_GPO | MVEBU_SETTING_GPI)) {
seq_putc(s, '(');
if (grp->settings[n].flags & MVEBU_SETTING_GPI)
seq_putc(s, 'i');
if (grp->settings[n].flags & MVEBU_SETTING_GPO)
seq_putc(s, 'o');
seq_putc(s, ')');
}
}
seq_puts(s, " ]");
}
}
static const struct pinconf_ops mvebu_pinconf_ops = {
.pin_config_group_get = mvebu_pinconf_group_get,
.pin_config_group_set = mvebu_pinconf_group_set,
.pin_config_group_dbg_show = mvebu_pinconf_group_dbg_show,
};
static int mvebu_pinmux_get_funcs_count(struct pinctrl_dev *pctldev)
{
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
return pctl->num_functions;
}
static const char *mvebu_pinmux_get_func_name(struct pinctrl_dev *pctldev,
unsigned fid)
{
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
return pctl->functions[fid].name;
}
static int mvebu_pinmux_get_groups(struct pinctrl_dev *pctldev, unsigned fid,
const char * const **groups,
unsigned * const num_groups)
{
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
*groups = pctl->functions[fid].groups;
*num_groups = pctl->functions[fid].num_groups;
return 0;
}
static int mvebu_pinmux_set(struct pinctrl_dev *pctldev, unsigned fid,
unsigned gid)
{
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
struct mvebu_pinctrl_function *func = &pctl->functions[fid];
struct mvebu_pinctrl_group *grp = &pctl->groups[gid];
struct mvebu_mpp_ctrl_setting *setting;
int ret;
unsigned long config;
setting = mvebu_pinctrl_find_setting_by_name(pctl, grp,
func->name);
if (!setting) {
dev_err(pctl->dev,
"unable to find setting %s in group %s\n",
func->name, func->groups[gid]);
return -EINVAL;
}
config = setting->val;
ret = mvebu_pinconf_group_set(pctldev, grp->gid, &config, 1);
if (ret) {
dev_err(pctl->dev, "cannot set group %s to %s\n",
func->groups[gid], func->name);
return ret;
}
return 0;
}
static int mvebu_pinmux_gpio_request_enable(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range, unsigned offset)
{
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
struct mvebu_pinctrl_group *grp;
struct mvebu_mpp_ctrl_setting *setting;
unsigned long config;
grp = mvebu_pinctrl_find_group_by_pid(pctl, offset);
if (!grp)
return -EINVAL;
if (grp->ctrl->mpp_gpio_req)
return grp->ctrl->mpp_gpio_req(grp->data, offset);
setting = mvebu_pinctrl_find_gpio_setting(pctl, grp);
if (!setting)
return -ENOTSUPP;
config = setting->val;
return mvebu_pinconf_group_set(pctldev, grp->gid, &config, 1);
}
static int mvebu_pinmux_gpio_set_direction(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range, unsigned offset, bool input)
{
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
struct mvebu_pinctrl_group *grp;
struct mvebu_mpp_ctrl_setting *setting;
grp = mvebu_pinctrl_find_group_by_pid(pctl, offset);
if (!grp)
return -EINVAL;
if (grp->ctrl->mpp_gpio_dir)
return grp->ctrl->mpp_gpio_dir(grp->data, offset, input);
setting = mvebu_pinctrl_find_gpio_setting(pctl, grp);
if (!setting)
return -ENOTSUPP;
if ((input && (setting->flags & MVEBU_SETTING_GPI)) ||
(!input && (setting->flags & MVEBU_SETTING_GPO)))
return 0;
return -ENOTSUPP;
}
static const struct pinmux_ops mvebu_pinmux_ops = {
.get_functions_count = mvebu_pinmux_get_funcs_count,
.get_function_name = mvebu_pinmux_get_func_name,
.get_function_groups = mvebu_pinmux_get_groups,
.gpio_request_enable = mvebu_pinmux_gpio_request_enable,
.gpio_set_direction = mvebu_pinmux_gpio_set_direction,
.set_mux = mvebu_pinmux_set,
};
static int mvebu_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
{
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
return pctl->num_groups;
}
static const char *mvebu_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
unsigned gid)
{
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
return pctl->groups[gid].name;
}
static int mvebu_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
unsigned gid, const unsigned **pins,
unsigned *num_pins)
{
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
*pins = pctl->groups[gid].pins;
*num_pins = pctl->groups[gid].npins;
return 0;
}
static int mvebu_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
struct device_node *np,
struct pinctrl_map **map,
unsigned *num_maps)
{
struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
struct property *prop;
const char *function;
const char *group;
int ret, nmaps, n;
*map = NULL;
*num_maps = 0;
ret = of_property_read_string(np, "marvell,function", &function);
if (ret) {
dev_err(pctl->dev,
"missing marvell,function in node %s\n", np->name);
return 0;
}
nmaps = of_property_count_strings(np, "marvell,pins");
if (nmaps < 0) {
dev_err(pctl->dev,
"missing marvell,pins in node %s\n", np->name);
return 0;
}
*map = kmalloc_array(nmaps, sizeof(**map), GFP_KERNEL);
if (!*map)
return -ENOMEM;
n = 0;
of_property_for_each_string(np, "marvell,pins", prop, group) {
struct mvebu_pinctrl_group *grp =
mvebu_pinctrl_find_group_by_name(pctl, group);
if (!grp) {
dev_err(pctl->dev, "unknown pin %s", group);
continue;
}
if (!mvebu_pinctrl_find_setting_by_name(pctl, grp, function)) {
dev_err(pctl->dev, "unsupported function %s on pin %s",
function, group);
continue;
}
(*map)[n].type = PIN_MAP_TYPE_MUX_GROUP;
(*map)[n].data.mux.group = group;
(*map)[n].data.mux.function = function;
n++;
}
*num_maps = nmaps;
return 0;
}
static void mvebu_pinctrl_dt_free_map(struct pinctrl_dev *pctldev,
struct pinctrl_map *map, unsigned num_maps)
{
kfree(map);
}
static const struct pinctrl_ops mvebu_pinctrl_ops = {
.get_groups_count = mvebu_pinctrl_get_groups_count,
.get_group_name = mvebu_pinctrl_get_group_name,
.get_group_pins = mvebu_pinctrl_get_group_pins,
.dt_node_to_map = mvebu_pinctrl_dt_node_to_map,
.dt_free_map = mvebu_pinctrl_dt_free_map,
};
static int _add_function(struct mvebu_pinctrl_function *funcs, int *funcsize,
const char *name)
{
if (*funcsize <= 0)
return -EOVERFLOW;
while (funcs->num_groups) {
/* function already there */
if (strcmp(funcs->name, name) == 0) {
funcs->num_groups++;
return -EEXIST;
}
funcs++;
}
/* append new unique function */
funcs->name = name;
funcs->num_groups = 1;
(*funcsize)--;
return 0;
}
static int mvebu_pinctrl_build_functions(struct platform_device *pdev,
struct mvebu_pinctrl *pctl)
{
struct mvebu_pinctrl_function *funcs;
int num = 0, funcsize = pctl->desc.npins;
int n, s;
/* we allocate functions for number of pins and hope
* there are fewer unique functions than pins available */
funcs = devm_kcalloc(&pdev->dev,
funcsize, sizeof(struct mvebu_pinctrl_function),
GFP_KERNEL);
if (!funcs)
return -ENOMEM;
for (n = 0; n < pctl->num_groups; n++) {
struct mvebu_pinctrl_group *grp = &pctl->groups[n];
for (s = 0; s < grp->num_settings; s++) {
int ret;
/* skip unsupported settings on this variant */
if (pctl->variant &&
!(pctl->variant & grp->settings[s].variant))
continue;
/* check for unique functions and count groups */
ret = _add_function(funcs, &funcsize,
grp->settings[s].name);
if (ret == -EOVERFLOW)
dev_err(&pdev->dev,
"More functions than pins(%d)\n",
pctl->desc.npins);
if (ret < 0)
continue;
num++;
}
}
pctl->num_functions = num;
pctl->functions = funcs;
for (n = 0; n < pctl->num_groups; n++) {
struct mvebu_pinctrl_group *grp = &pctl->groups[n];
for (s = 0; s < grp->num_settings; s++) {
struct mvebu_pinctrl_function *f;
const char **groups;
/* skip unsupported settings on this variant */
if (pctl->variant &&
!(pctl->variant & grp->settings[s].variant))
continue;
f = mvebu_pinctrl_find_function_by_name(pctl,
grp->settings[s].name);
/* allocate group name array if not done already */
if (!f->groups) {
f->groups = devm_kcalloc(&pdev->dev,
f->num_groups,
sizeof(char *),
GFP_KERNEL);
if (!f->groups)
return -ENOMEM;
}
/* find next free group name and assign current name */
groups = f->groups;
while (*groups)
groups++;
*groups = grp->name;
}
}
return 0;
}
int mvebu_pinctrl_probe(struct platform_device *pdev)
{
struct mvebu_pinctrl_soc_info *soc = dev_get_platdata(&pdev->dev);
struct mvebu_pinctrl *pctl;
struct pinctrl_pin_desc *pdesc;
unsigned gid, n, k;
unsigned size, noname = 0;
char *noname_buf;
void *p;
int ret;
if (!soc || !soc->controls || !soc->modes) {
dev_err(&pdev->dev, "wrong pinctrl soc info\n");
return -EINVAL;
}
pctl = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_pinctrl),
GFP_KERNEL);
if (!pctl)
return -ENOMEM;
pctl->desc.name = dev_name(&pdev->dev);
pctl->desc.owner = THIS_MODULE;
pctl->desc.pctlops = &mvebu_pinctrl_ops;
pctl->desc.pmxops = &mvebu_pinmux_ops;
pctl->desc.confops = &mvebu_pinconf_ops;
pctl->variant = soc->variant;
pctl->dev = &pdev->dev;
platform_set_drvdata(pdev, pctl);
/* count controls and create names for mvebu generic
register controls; also does sanity checks */
pctl->num_groups = 0;
pctl->desc.npins = 0;
for (n = 0; n < soc->ncontrols; n++) {
const struct mvebu_mpp_ctrl *ctrl = &soc->controls[n];
pctl->desc.npins += ctrl->npins;
/* initialize control's pins[] array */
for (k = 0; k < ctrl->npins; k++)
ctrl->pins[k] = ctrl->pid + k;
/*
* We allow to pass controls with NULL name that we treat
* as a range of one-pin groups with generic mvebu register
* controls.
*/
if (!ctrl->name) {
pctl->num_groups += ctrl->npins;
noname += ctrl->npins;
} else {
pctl->num_groups += 1;
}
}
pdesc = devm_kcalloc(&pdev->dev,
pctl->desc.npins,
sizeof(struct pinctrl_pin_desc),
GFP_KERNEL);
if (!pdesc)
return -ENOMEM;
for (n = 0; n < pctl->desc.npins; n++)
pdesc[n].number = n;
pctl->desc.pins = pdesc;
/*
* allocate groups and name buffers for unnamed groups.
*/
size = pctl->num_groups * sizeof(*pctl->groups) + noname * 8;
p = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
if (!p)
return -ENOMEM;
pctl->groups = p;
noname_buf = p + pctl->num_groups * sizeof(*pctl->groups);
/* assign mpp controls to groups */
gid = 0;
for (n = 0; n < soc->ncontrols; n++) {
const struct mvebu_mpp_ctrl *ctrl = &soc->controls[n];
struct mvebu_mpp_ctrl_data *data = soc->control_data ?
&soc->control_data[n] : NULL;
pctl->groups[gid].gid = gid;
pctl->groups[gid].ctrl = ctrl;
pctl->groups[gid].data = data;
pctl->groups[gid].name = ctrl->name;
pctl->groups[gid].pins = ctrl->pins;
pctl->groups[gid].npins = ctrl->npins;
/*
* We treat unnamed controls as a range of one-pin groups
* with generic mvebu register controls. Use one group for
* each in this range and assign a default group name.
*/
if (!ctrl->name) {
pctl->groups[gid].name = noname_buf;
pctl->groups[gid].npins = 1;
sprintf(noname_buf, "mpp%d", ctrl->pid+0);
noname_buf += 8;
for (k = 1; k < ctrl->npins; k++) {
gid++;
pctl->groups[gid].gid = gid;
pctl->groups[gid].ctrl = ctrl;
pctl->groups[gid].data = data;
pctl->groups[gid].name = noname_buf;
pctl->groups[gid].pins = &ctrl->pins[k];
pctl->groups[gid].npins = 1;
sprintf(noname_buf, "mpp%d", ctrl->pid+k);
noname_buf += 8;
}
}
gid++;
}
/* assign mpp modes to groups */
for (n = 0; n < soc->nmodes; n++) {
struct mvebu_mpp_mode *mode = &soc->modes[n];
struct mvebu_mpp_ctrl_setting *set = &mode->settings[0];
struct mvebu_pinctrl_group *grp;
unsigned num_settings;
unsigned supp_settings;
for (num_settings = 0, supp_settings = 0; ; set++) {
if (!set->name)
break;
num_settings++;
/* skip unsupported settings for this variant */
if (pctl->variant && !(pctl->variant & set->variant))
continue;
supp_settings++;
/* find gpio/gpo/gpi settings */
if (strcmp(set->name, "gpio") == 0)
set->flags = MVEBU_SETTING_GPI |
MVEBU_SETTING_GPO;
else if (strcmp(set->name, "gpo") == 0)
set->flags = MVEBU_SETTING_GPO;
else if (strcmp(set->name, "gpi") == 0)
set->flags = MVEBU_SETTING_GPI;
}
/* skip modes with no settings for this variant */
if (!supp_settings)
continue;
grp = mvebu_pinctrl_find_group_by_pid(pctl, mode->pid);
if (!grp) {
dev_warn(&pdev->dev, "unknown pinctrl group %d\n",
mode->pid);
continue;
}
grp->settings = mode->settings;
grp->num_settings = num_settings;
}
ret = mvebu_pinctrl_build_functions(pdev, pctl);
if (ret) {
dev_err(&pdev->dev, "unable to build functions\n");
return ret;
}
pctl->pctldev = devm_pinctrl_register(&pdev->dev, &pctl->desc, pctl);
if (IS_ERR(pctl->pctldev)) {
dev_err(&pdev->dev, "unable to register pinctrl driver\n");
return PTR_ERR(pctl->pctldev);
}
dev_info(&pdev->dev, "registered pinctrl driver\n");
/* register gpio ranges */
for (n = 0; n < soc->ngpioranges; n++)
pinctrl_add_gpio_range(pctl->pctldev, &soc->gpioranges[n]);
return 0;
}
/*
* mvebu_pinctrl_simple_mmio_probe - probe a simple mmio pinctrl
* @pdev: platform device (with platform data already attached)
*
* Initialise a simple (single base address) mmio pinctrl driver,
* assigning the MMIO base address to all mvebu mpp ctrl instances.
*/
int mvebu_pinctrl_simple_mmio_probe(struct platform_device *pdev)
{
struct mvebu_pinctrl_soc_info *soc = dev_get_platdata(&pdev->dev);
struct mvebu_mpp_ctrl_data *mpp_data;
struct resource *res;
void __iomem *base;
int i;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
mpp_data = devm_kcalloc(&pdev->dev, soc->ncontrols, sizeof(*mpp_data),
GFP_KERNEL);
if (!mpp_data)
return -ENOMEM;
for (i = 0; i < soc->ncontrols; i++)
mpp_data[i].base = base;
soc->control_data = mpp_data;
return mvebu_pinctrl_probe(pdev);
}
int mvebu_regmap_mpp_ctrl_get(struct mvebu_mpp_ctrl_data *data,
unsigned int pid, unsigned long *config)
{
unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
unsigned int val;
int err;
err = regmap_read(data->regmap.map, data->regmap.offset + off, &val);
if (err)
return err;
*config = (val >> shift) & MVEBU_MPP_MASK;
return 0;
}
int mvebu_regmap_mpp_ctrl_set(struct mvebu_mpp_ctrl_data *data,
unsigned int pid, unsigned long config)
{
unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
return regmap_update_bits(data->regmap.map, data->regmap.offset + off,
MVEBU_MPP_MASK << shift, config << shift);
}
int mvebu_pinctrl_simple_regmap_probe(struct platform_device *pdev,
struct device *syscon_dev, u32 offset)
{
struct mvebu_pinctrl_soc_info *soc = dev_get_platdata(&pdev->dev);
struct mvebu_mpp_ctrl_data *mpp_data;
struct regmap *regmap;
int i;
regmap = syscon_node_to_regmap(syscon_dev->of_node);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
mpp_data = devm_kcalloc(&pdev->dev, soc->ncontrols, sizeof(*mpp_data),
GFP_KERNEL);
if (!mpp_data)
return -ENOMEM;
for (i = 0; i < soc->ncontrols; i++) {
mpp_data[i].regmap.map = regmap;
mpp_data[i].regmap.offset = offset;
}
soc->control_data = mpp_data;
return mvebu_pinctrl_probe(pdev);
}
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