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kernel/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c

1233 lines
27 KiB
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2018 MediaTek Inc.
*
* Author: Sean Wang <sean.wang@mediatek.com>
*
*/
#include <dt-bindings/pinctrl/mt65xx.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/gpio/driver.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_irq.h>
#include "mtk-eint.h"
#include "pinctrl-mtk-common-v2.h"
/**
* struct mtk_drive_desc - the structure that holds the information
* of the driving current
* @min: the minimum current of this group
* @max: the maximum current of this group
* @step: the step current of this group
* @scal: the weight factor
*
* formula: output = ((input) / step - 1) * scal
*/
struct mtk_drive_desc {
u8 min;
u8 max;
u8 step;
u8 scal;
};
/* The groups of drive strength */
static const struct mtk_drive_desc mtk_drive[] = {
[DRV_GRP0] = { 4, 16, 4, 1 },
[DRV_GRP1] = { 4, 16, 4, 2 },
[DRV_GRP2] = { 2, 8, 2, 1 },
[DRV_GRP3] = { 2, 8, 2, 2 },
[DRV_GRP4] = { 2, 16, 2, 1 },
};
static void mtk_w32(struct mtk_pinctrl *pctl, u8 i, u32 reg, u32 val)
{
writel_relaxed(val, pctl->base[i] + reg);
}
static u32 mtk_r32(struct mtk_pinctrl *pctl, u8 i, u32 reg)
{
return readl_relaxed(pctl->base[i] + reg);
}
void mtk_rmw(struct mtk_pinctrl *pctl, u8 i, u32 reg, u32 mask, u32 set)
{
u32 val;
unsigned long flags;
spin_lock_irqsave(&pctl->lock, flags);
val = mtk_r32(pctl, i, reg);
val &= ~mask;
val |= set;
mtk_w32(pctl, i, reg, val);
spin_unlock_irqrestore(&pctl->lock, flags);
}
static int mtk_hw_pin_field_lookup(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc,
int field, struct mtk_pin_field *pfd)
{
const struct mtk_pin_field_calc *c;
const struct mtk_pin_reg_calc *rc;
int start = 0, end, check;
bool found = false;
u32 bits;
if (hw->soc->reg_cal && hw->soc->reg_cal[field].range) {
rc = &hw->soc->reg_cal[field];
} else {
dev_dbg(hw->dev,
"Not support field %d for this soc\n", field);
return -ENOTSUPP;
}
end = rc->nranges - 1;
while (start <= end) {
check = (start + end) >> 1;
if (desc->number >= rc->range[check].s_pin
&& desc->number <= rc->range[check].e_pin) {
found = true;
break;
} else if (start == end)
break;
else if (desc->number < rc->range[check].s_pin)
end = check - 1;
else
start = check + 1;
}
if (!found) {
dev_dbg(hw->dev, "Not support field %d for pin = %d (%s)\n",
field, desc->number, desc->name);
return -ENOTSUPP;
}
c = rc->range + check;
if (c->i_base > hw->nbase - 1) {
dev_err(hw->dev,
"Invalid base for field %d for pin = %d (%s)\n",
field, desc->number, desc->name);
return -EINVAL;
}
/* Calculated bits as the overall offset the pin is located at,
* if c->fixed is held, that determines the all the pins in the
* range use the same field with the s_pin.
*/
bits = c->fixed ? c->s_bit : c->s_bit +
(desc->number - c->s_pin) * (c->x_bits);
/* Fill pfd from bits. For example 32-bit register applied is assumed
* when c->sz_reg is equal to 32.
*/
pfd->index = c->i_base;
pfd->offset = c->s_addr + c->x_addrs * (bits / c->sz_reg);
pfd->bitpos = bits % c->sz_reg;
pfd->mask = (1 << c->x_bits) - 1;
/* pfd->next is used for indicating that bit wrapping-around happens
* which requires the manipulation for bit 0 starting in the next
* register to form the complete field read/write.
*/
pfd->next = pfd->bitpos + c->x_bits > c->sz_reg ? c->x_addrs : 0;
return 0;
}
static int mtk_hw_pin_field_get(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc,
int field, struct mtk_pin_field *pfd)
{
if (field < 0 || field >= PINCTRL_PIN_REG_MAX) {
dev_err(hw->dev, "Invalid Field %d\n", field);
return -EINVAL;
}
return mtk_hw_pin_field_lookup(hw, desc, field, pfd);
}
static void mtk_hw_bits_part(struct mtk_pin_field *pf, int *h, int *l)
{
*l = 32 - pf->bitpos;
*h = get_count_order(pf->mask) - *l;
}
static void mtk_hw_write_cross_field(struct mtk_pinctrl *hw,
struct mtk_pin_field *pf, int value)
{
int nbits_l, nbits_h;
mtk_hw_bits_part(pf, &nbits_h, &nbits_l);
mtk_rmw(hw, pf->index, pf->offset, pf->mask << pf->bitpos,
(value & pf->mask) << pf->bitpos);
mtk_rmw(hw, pf->index, pf->offset + pf->next, BIT(nbits_h) - 1,
(value & pf->mask) >> nbits_l);
}
static void mtk_hw_read_cross_field(struct mtk_pinctrl *hw,
struct mtk_pin_field *pf, int *value)
{
int nbits_l, nbits_h, h, l;
mtk_hw_bits_part(pf, &nbits_h, &nbits_l);
l = (mtk_r32(hw, pf->index, pf->offset)
>> pf->bitpos) & (BIT(nbits_l) - 1);
h = (mtk_r32(hw, pf->index, pf->offset + pf->next))
& (BIT(nbits_h) - 1);
*value = (h << nbits_l) | l;
}
int mtk_hw_set_value(struct mtk_pinctrl *hw, const struct mtk_pin_desc *desc,
int field, int value)
{
struct mtk_pin_field pf;
int err;
err = mtk_hw_pin_field_get(hw, desc, field, &pf);
if (err)
return err;
if (value < 0 || value > pf.mask)
return -EINVAL;
if (!pf.next)
mtk_rmw(hw, pf.index, pf.offset, pf.mask << pf.bitpos,
(value & pf.mask) << pf.bitpos);
else
mtk_hw_write_cross_field(hw, &pf, value);
return 0;
}
EXPORT_SYMBOL_GPL(mtk_hw_set_value);
int mtk_hw_get_value(struct mtk_pinctrl *hw, const struct mtk_pin_desc *desc,
int field, int *value)
{
struct mtk_pin_field pf;
int err;
err = mtk_hw_pin_field_get(hw, desc, field, &pf);
if (err)
return err;
if (!pf.next)
*value = (mtk_r32(hw, pf.index, pf.offset)
>> pf.bitpos) & pf.mask;
else
mtk_hw_read_cross_field(hw, &pf, value);
return 0;
}
EXPORT_SYMBOL_GPL(mtk_hw_get_value);
static int mtk_xt_find_eint_num(struct mtk_pinctrl *hw, unsigned long eint_n)
{
const struct mtk_pin_desc *desc;
int i = 0;
desc = (const struct mtk_pin_desc *)hw->soc->pins;
while (i < hw->soc->npins) {
if (desc[i].eint.eint_n == eint_n)
return desc[i].number;
i++;
}
return EINT_NA;
}
/*
* Virtual GPIO only used inside SOC and not being exported to outside SOC.
* Some modules use virtual GPIO as eint (e.g. pmif or usb).
* In MTK platform, external interrupt (EINT) and GPIO is 1-1 mapping
* and we can set GPIO as eint.
* But some modules use specific eint which doesn't have real GPIO pin.
* So we use virtual GPIO to map it.
*/
bool mtk_is_virt_gpio(struct mtk_pinctrl *hw, unsigned int gpio_n)
{
const struct mtk_pin_desc *desc;
bool virt_gpio = false;
desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio_n];
/* if the GPIO is not supported for eint mode */
if (desc->eint.eint_m == NO_EINT_SUPPORT)
return virt_gpio;
if (desc->funcs && !desc->funcs[desc->eint.eint_m].name)
virt_gpio = true;
return virt_gpio;
}
EXPORT_SYMBOL_GPL(mtk_is_virt_gpio);
static int mtk_xt_get_gpio_n(void *data, unsigned long eint_n,
unsigned int *gpio_n,
struct gpio_chip **gpio_chip)
{
struct mtk_pinctrl *hw = (struct mtk_pinctrl *)data;
const struct mtk_pin_desc *desc;
desc = (const struct mtk_pin_desc *)hw->soc->pins;
*gpio_chip = &hw->chip;
/*
* Be greedy to guess first gpio_n is equal to eint_n.
* Only eint virtual eint number is greater than gpio number.
*/
if (hw->soc->npins > eint_n &&
desc[eint_n].eint.eint_n == eint_n)
*gpio_n = eint_n;
else
*gpio_n = mtk_xt_find_eint_num(hw, eint_n);
return *gpio_n == EINT_NA ? -EINVAL : 0;
}
static int mtk_xt_get_gpio_state(void *data, unsigned long eint_n)
{
struct mtk_pinctrl *hw = (struct mtk_pinctrl *)data;
const struct mtk_pin_desc *desc;
struct gpio_chip *gpio_chip;
unsigned int gpio_n;
int value, err;
err = mtk_xt_get_gpio_n(hw, eint_n, &gpio_n, &gpio_chip);
if (err)
return err;
desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio_n];
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DI, &value);
if (err)
return err;
return !!value;
}
static int mtk_xt_set_gpio_as_eint(void *data, unsigned long eint_n)
{
struct mtk_pinctrl *hw = (struct mtk_pinctrl *)data;
const struct mtk_pin_desc *desc;
struct gpio_chip *gpio_chip;
unsigned int gpio_n;
int err;
err = mtk_xt_get_gpio_n(hw, eint_n, &gpio_n, &gpio_chip);
if (err)
return err;
if (mtk_is_virt_gpio(hw, gpio_n))
return 0;
desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio_n];
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE,
desc->eint.eint_m);
if (err)
return err;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, MTK_INPUT);
if (err)
return err;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT, MTK_ENABLE);
/* SMT is supposed to be supported by every real GPIO and doesn't
* support virtual GPIOs, so the extra condition err != -ENOTSUPP
* is just for adding EINT support to these virtual GPIOs. It should
* add an extra flag in the pin descriptor when more pins with
* distinctive characteristic come out.
*/
if (err && err != -ENOTSUPP)
return err;
return 0;
}
static const struct mtk_eint_xt mtk_eint_xt = {
.get_gpio_n = mtk_xt_get_gpio_n,
.get_gpio_state = mtk_xt_get_gpio_state,
.set_gpio_as_eint = mtk_xt_set_gpio_as_eint,
};
int mtk_build_eint(struct mtk_pinctrl *hw, struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
int ret;
if (!IS_ENABLED(CONFIG_EINT_MTK))
return 0;
if (!of_property_read_bool(np, "interrupt-controller"))
return -ENODEV;
hw->eint = devm_kzalloc(hw->dev, sizeof(*hw->eint), GFP_KERNEL);
if (!hw->eint)
return -ENOMEM;
hw->eint->base = devm_platform_ioremap_resource_byname(pdev, "eint");
if (IS_ERR(hw->eint->base)) {
ret = PTR_ERR(hw->eint->base);
goto err_free_eint;
}
hw->eint->irq = irq_of_parse_and_map(np, 0);
if (!hw->eint->irq) {
ret = -EINVAL;
goto err_free_eint;
}
if (!hw->soc->eint_hw) {
ret = -ENODEV;
goto err_free_eint;
}
hw->eint->dev = &pdev->dev;
hw->eint->hw = hw->soc->eint_hw;
hw->eint->pctl = hw;
hw->eint->gpio_xlate = &mtk_eint_xt;
return mtk_eint_do_init(hw->eint);
err_free_eint:
devm_kfree(hw->dev, hw->eint);
hw->eint = NULL;
return ret;
}
EXPORT_SYMBOL_GPL(mtk_build_eint);
/* Revision 0 */
int mtk_pinconf_bias_disable_set(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc)
{
int err;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PU,
MTK_DISABLE);
if (err)
return err;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PD,
MTK_DISABLE);
if (err)
return err;
return 0;
}
EXPORT_SYMBOL_GPL(mtk_pinconf_bias_disable_set);
int mtk_pinconf_bias_disable_get(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, int *res)
{
int v, v2;
int err;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PU, &v);
if (err)
return err;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PD, &v2);
if (err)
return err;
if (v == MTK_ENABLE || v2 == MTK_ENABLE)
return -EINVAL;
*res = 1;
return 0;
}
EXPORT_SYMBOL_GPL(mtk_pinconf_bias_disable_get);
int mtk_pinconf_bias_set(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, bool pullup)
{
int err, arg;
arg = pullup ? 1 : 2;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PU, arg & 1);
if (err)
return err;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PD,
!!(arg & 2));
if (err)
return err;
return 0;
}
EXPORT_SYMBOL_GPL(mtk_pinconf_bias_set);
int mtk_pinconf_bias_get(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, bool pullup, int *res)
{
int reg, err, v;
reg = pullup ? PINCTRL_PIN_REG_PU : PINCTRL_PIN_REG_PD;
err = mtk_hw_get_value(hw, desc, reg, &v);
if (err)
return err;
if (!v)
return -EINVAL;
*res = 1;
return 0;
}
EXPORT_SYMBOL_GPL(mtk_pinconf_bias_get);
/* Revision 1 */
int mtk_pinconf_bias_disable_set_rev1(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc)
{
return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PULLEN,
MTK_DISABLE);
}
EXPORT_SYMBOL_GPL(mtk_pinconf_bias_disable_set_rev1);
int mtk_pinconf_bias_disable_get_rev1(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, int *res)
{
int v, err;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PULLEN, &v);
if (err)
return err;
if (v == MTK_ENABLE)
return -EINVAL;
*res = 1;
return 0;
}
EXPORT_SYMBOL_GPL(mtk_pinconf_bias_disable_get_rev1);
int mtk_pinconf_bias_set_rev1(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, bool pullup)
{
int err, arg;
arg = pullup ? MTK_PULLUP : MTK_PULLDOWN;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PULLEN,
MTK_ENABLE);
if (err)
return err;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PULLSEL, arg);
if (err)
return err;
return 0;
}
EXPORT_SYMBOL_GPL(mtk_pinconf_bias_set_rev1);
int mtk_pinconf_bias_get_rev1(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, bool pullup,
int *res)
{
int err, v;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PULLEN, &v);
if (err)
return err;
if (v == MTK_DISABLE)
return -EINVAL;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PULLSEL, &v);
if (err)
return err;
if (pullup ^ (v == MTK_PULLUP))
return -EINVAL;
*res = 1;
return 0;
}
EXPORT_SYMBOL_GPL(mtk_pinconf_bias_get_rev1);
/* Combo for the following pull register type:
* 1. PU + PD
* 2. PULLSEL + PULLEN
* 3. PUPD + R0 + R1
*/
static int mtk_pinconf_bias_set_pu_pd(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc,
u32 pullup, u32 arg)
{
int err, pu, pd;
if (arg == MTK_DISABLE) {
pu = 0;
pd = 0;
} else if ((arg == MTK_ENABLE) && pullup) {
pu = 1;
pd = 0;
} else if ((arg == MTK_ENABLE) && !pullup) {
pu = 0;
pd = 1;
} else {
err = -EINVAL;
goto out;
}
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PU, pu);
if (err)
goto out;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PD, pd);
out:
return err;
}
static int mtk_pinconf_bias_set_pullsel_pullen(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc,
u32 pullup, u32 arg)
{
int err, enable;
if (arg == MTK_DISABLE)
enable = 0;
else if (arg == MTK_ENABLE)
enable = 1;
else {
err = -EINVAL;
goto out;
}
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PULLEN, enable);
if (err)
goto out;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PULLSEL, pullup);
out:
return err;
}
static int mtk_pinconf_bias_set_pupd_r1_r0(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc,
u32 pullup, u32 arg)
{
int err, r0, r1;
if ((arg == MTK_DISABLE) || (arg == MTK_PUPD_SET_R1R0_00)) {
pullup = 0;
r0 = 0;
r1 = 0;
} else if (arg == MTK_PUPD_SET_R1R0_01) {
r0 = 1;
r1 = 0;
} else if (arg == MTK_PUPD_SET_R1R0_10) {
r0 = 0;
r1 = 1;
} else if (arg == MTK_PUPD_SET_R1R0_11) {
r0 = 1;
r1 = 1;
} else {
err = -EINVAL;
goto out;
}
/* MTK HW PUPD bit: 1 for pull-down, 0 for pull-up */
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PUPD, !pullup);
if (err)
goto out;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_R0, r0);
if (err)
goto out;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_R1, r1);
out:
return err;
}
static int mtk_hw_pin_rsel_lookup(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc,
u32 pullup, u32 arg, u32 *rsel_val)
{
const struct mtk_pin_rsel *rsel;
int check;
bool found = false;
rsel = hw->soc->pin_rsel;
for (check = 0; check <= hw->soc->npin_rsel - 1; check++) {
if (desc->number >= rsel[check].s_pin &&
desc->number <= rsel[check].e_pin) {
if (pullup) {
if (rsel[check].up_rsel == arg) {
found = true;
*rsel_val = rsel[check].rsel_index;
break;
}
} else {
if (rsel[check].down_rsel == arg) {
found = true;
*rsel_val = rsel[check].rsel_index;
break;
}
}
}
}
if (!found) {
dev_err(hw->dev, "Not support rsel value %d Ohm for pin = %d (%s)\n",
arg, desc->number, desc->name);
return -ENOTSUPP;
}
return 0;
}
static int mtk_pinconf_bias_set_rsel(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc,
u32 pullup, u32 arg)
{
int err, rsel_val;
if (hw->rsel_si_unit) {
/* find pin rsel_index from pin_rsel array*/
err = mtk_hw_pin_rsel_lookup(hw, desc, pullup, arg, &rsel_val);
if (err)
return err;
} else {
if (arg < MTK_PULL_SET_RSEL_000 || arg > MTK_PULL_SET_RSEL_111)
return -EINVAL;
rsel_val = arg - MTK_PULL_SET_RSEL_000;
}
return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_RSEL, rsel_val);
}
static int mtk_pinconf_bias_set_pu_pd_rsel(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc,
u32 pullup, u32 arg)
{
u32 enable = arg == MTK_DISABLE ? MTK_DISABLE : MTK_ENABLE;
int err;
if (arg != MTK_DISABLE) {
err = mtk_pinconf_bias_set_rsel(hw, desc, pullup, arg);
if (err)
return err;
}
return mtk_pinconf_bias_set_pu_pd(hw, desc, pullup, enable);
}
int mtk_pinconf_bias_set_combo(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc,
u32 pullup, u32 arg)
{
int err = -ENOTSUPP;
u32 try_all_type;
if (hw->soc->pull_type)
try_all_type = hw->soc->pull_type[desc->number];
else
try_all_type = MTK_PULL_TYPE_MASK;
if (try_all_type & MTK_PULL_RSEL_TYPE) {
err = mtk_pinconf_bias_set_pu_pd_rsel(hw, desc, pullup, arg);
if (!err)
return 0;
}
if (try_all_type & MTK_PULL_PU_PD_TYPE) {
err = mtk_pinconf_bias_set_pu_pd(hw, desc, pullup, arg);
if (!err)
return 0;
}
if (try_all_type & MTK_PULL_PULLSEL_TYPE) {
err = mtk_pinconf_bias_set_pullsel_pullen(hw, desc,
pullup, arg);
if (!err)
return 0;
}
if (try_all_type & MTK_PULL_PUPD_R1R0_TYPE)
err = mtk_pinconf_bias_set_pupd_r1_r0(hw, desc, pullup, arg);
if (err)
dev_err(hw->dev, "Invalid pull argument\n");
return err;
}
EXPORT_SYMBOL_GPL(mtk_pinconf_bias_set_combo);
static int mtk_rsel_get_si_unit(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc,
u32 pullup, u32 rsel_val, u32 *si_unit)
{
const struct mtk_pin_rsel *rsel;
int check;
rsel = hw->soc->pin_rsel;
for (check = 0; check <= hw->soc->npin_rsel - 1; check++) {
if (desc->number >= rsel[check].s_pin &&
desc->number <= rsel[check].e_pin) {
if (rsel_val == rsel[check].rsel_index) {
if (pullup)
*si_unit = rsel[check].up_rsel;
else
*si_unit = rsel[check].down_rsel;
break;
}
}
}
return 0;
}
static int mtk_pinconf_bias_get_pu_pd_rsel(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc,
u32 *pullup, u32 *enable)
{
int pu, pd, rsel, err;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_RSEL, &rsel);
if (err)
goto out;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PU, &pu);
if (err)
goto out;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PD, &pd);
if (err)
goto out;
if (pu == 0 && pd == 0) {
*pullup = 0;
*enable = MTK_DISABLE;
} else if (pu == 1 && pd == 0) {
*pullup = 1;
if (hw->rsel_si_unit)
mtk_rsel_get_si_unit(hw, desc, *pullup, rsel, enable);
else
*enable = rsel + MTK_PULL_SET_RSEL_000;
} else if (pu == 0 && pd == 1) {
*pullup = 0;
if (hw->rsel_si_unit)
mtk_rsel_get_si_unit(hw, desc, *pullup, rsel, enable);
else
*enable = rsel + MTK_PULL_SET_RSEL_000;
} else {
err = -EINVAL;
goto out;
}
out:
return err;
}
static int mtk_pinconf_bias_get_pu_pd(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc,
u32 *pullup, u32 *enable)
{
int err, pu, pd;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PU, &pu);
if (err)
goto out;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PD, &pd);
if (err)
goto out;
if (pu == 0 && pd == 0) {
*pullup = 0;
*enable = MTK_DISABLE;
} else if (pu == 1 && pd == 0) {
*pullup = 1;
*enable = MTK_ENABLE;
} else if (pu == 0 && pd == 1) {
*pullup = 0;
*enable = MTK_ENABLE;
} else
err = -EINVAL;
out:
return err;
}
static int mtk_pinconf_bias_get_pullsel_pullen(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc,
u32 *pullup, u32 *enable)
{
int err;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PULLSEL, pullup);
if (err)
goto out;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PULLEN, enable);
out:
return err;
}
static int mtk_pinconf_bias_get_pupd_r1_r0(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc,
u32 *pullup, u32 *enable)
{
int err, r0, r1;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PUPD, pullup);
if (err)
goto out;
/* MTK HW PUPD bit: 1 for pull-down, 0 for pull-up */
*pullup = !(*pullup);
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_R0, &r0);
if (err)
goto out;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_R1, &r1);
if (err)
goto out;
if ((r1 == 0) && (r0 == 0))
*enable = MTK_PUPD_SET_R1R0_00;
else if ((r1 == 0) && (r0 == 1))
*enable = MTK_PUPD_SET_R1R0_01;
else if ((r1 == 1) && (r0 == 0))
*enable = MTK_PUPD_SET_R1R0_10;
else if ((r1 == 1) && (r0 == 1))
*enable = MTK_PUPD_SET_R1R0_11;
else
err = -EINVAL;
out:
return err;
}
int mtk_pinconf_bias_get_combo(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc,
u32 *pullup, u32 *enable)
{
int err = -ENOTSUPP;
u32 try_all_type;
if (hw->soc->pull_type)
try_all_type = hw->soc->pull_type[desc->number];
else
try_all_type = MTK_PULL_TYPE_MASK;
if (try_all_type & MTK_PULL_RSEL_TYPE) {
err = mtk_pinconf_bias_get_pu_pd_rsel(hw, desc, pullup, enable);
if (!err)
return 0;
}
if (try_all_type & MTK_PULL_PU_PD_TYPE) {
err = mtk_pinconf_bias_get_pu_pd(hw, desc, pullup, enable);
if (!err)
return 0;
}
if (try_all_type & MTK_PULL_PULLSEL_TYPE) {
err = mtk_pinconf_bias_get_pullsel_pullen(hw, desc,
pullup, enable);
if (!err)
return 0;
}
if (try_all_type & MTK_PULL_PUPD_R1R0_TYPE)
err = mtk_pinconf_bias_get_pupd_r1_r0(hw, desc, pullup, enable);
return err;
}
EXPORT_SYMBOL_GPL(mtk_pinconf_bias_get_combo);
/* Revision 0 */
int mtk_pinconf_drive_set(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, u32 arg)
{
const struct mtk_drive_desc *tb;
int err = -ENOTSUPP;
tb = &mtk_drive[desc->drv_n];
/* 4mA when (e8, e4) = (0, 0)
* 8mA when (e8, e4) = (0, 1)
* 12mA when (e8, e4) = (1, 0)
* 16mA when (e8, e4) = (1, 1)
*/
if ((arg >= tb->min && arg <= tb->max) && !(arg % tb->step)) {
arg = (arg / tb->step - 1) * tb->scal;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_E4,
arg & 0x1);
if (err)
return err;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_E8,
(arg & 0x2) >> 1);
if (err)
return err;
}
return err;
}
EXPORT_SYMBOL_GPL(mtk_pinconf_drive_set);
int mtk_pinconf_drive_get(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, int *val)
{
const struct mtk_drive_desc *tb;
int err, val1, val2;
tb = &mtk_drive[desc->drv_n];
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_E4, &val1);
if (err)
return err;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_E8, &val2);
if (err)
return err;
/* 4mA when (e8, e4) = (0, 0); 8mA when (e8, e4) = (0, 1)
* 12mA when (e8, e4) = (1, 0); 16mA when (e8, e4) = (1, 1)
*/
*val = (((val2 << 1) + val1) / tb->scal + 1) * tb->step;
return 0;
}
EXPORT_SYMBOL_GPL(mtk_pinconf_drive_get);
/* Revision 1 */
int mtk_pinconf_drive_set_rev1(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, u32 arg)
{
const struct mtk_drive_desc *tb;
int err = -ENOTSUPP;
tb = &mtk_drive[desc->drv_n];
if ((arg >= tb->min && arg <= tb->max) && !(arg % tb->step)) {
arg = (arg / tb->step - 1) * tb->scal;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DRV,
arg);
if (err)
return err;
}
return err;
}
EXPORT_SYMBOL_GPL(mtk_pinconf_drive_set_rev1);
int mtk_pinconf_drive_get_rev1(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, int *val)
{
const struct mtk_drive_desc *tb;
int err, val1;
tb = &mtk_drive[desc->drv_n];
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DRV, &val1);
if (err)
return err;
*val = ((val1 & 0x7) / tb->scal + 1) * tb->step;
return 0;
}
EXPORT_SYMBOL_GPL(mtk_pinconf_drive_get_rev1);
int mtk_pinconf_drive_set_raw(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, u32 arg)
{
return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DRV, arg);
}
EXPORT_SYMBOL_GPL(mtk_pinconf_drive_set_raw);
int mtk_pinconf_drive_get_raw(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, int *val)
{
return mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DRV, val);
}
EXPORT_SYMBOL_GPL(mtk_pinconf_drive_get_raw);
int mtk_pinconf_adv_pull_set(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, bool pullup,
u32 arg)
{
int err;
/* 10K off & 50K (75K) off, when (R0, R1) = (0, 0);
* 10K off & 50K (75K) on, when (R0, R1) = (0, 1);
* 10K on & 50K (75K) off, when (R0, R1) = (1, 0);
* 10K on & 50K (75K) on, when (R0, R1) = (1, 1)
*/
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_R0, arg & 1);
if (err)
return 0;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_R1,
!!(arg & 2));
if (err)
return 0;
arg = pullup ? 0 : 1;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PUPD, arg);
/* If PUPD register is not supported for that pin, let's fallback to
* general bias control.
*/
if (err == -ENOTSUPP) {
if (hw->soc->bias_set) {
err = hw->soc->bias_set(hw, desc, pullup);
if (err)
return err;
} else {
err = mtk_pinconf_bias_set_rev1(hw, desc, pullup);
if (err)
err = mtk_pinconf_bias_set(hw, desc, pullup);
}
}
return err;
}
EXPORT_SYMBOL_GPL(mtk_pinconf_adv_pull_set);
int mtk_pinconf_adv_pull_get(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, bool pullup,
u32 *val)
{
u32 t, t2;
int err;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_PUPD, &t);
/* If PUPD register is not supported for that pin, let's fallback to
* general bias control.
*/
if (err == -ENOTSUPP) {
if (hw->soc->bias_get) {
err = hw->soc->bias_get(hw, desc, pullup, val);
if (err)
return err;
} else {
return -ENOTSUPP;
}
} else {
/* t == 0 supposes PULLUP for the customized PULL setup */
if (err)
return err;
if (pullup ^ !t)
return -EINVAL;
}
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_R0, &t);
if (err)
return err;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_R1, &t2);
if (err)
return err;
*val = (t | t2 << 1) & 0x7;
return 0;
}
EXPORT_SYMBOL_GPL(mtk_pinconf_adv_pull_get);
int mtk_pinconf_adv_drive_set(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, u32 arg)
{
int err;
int en = arg & 1;
int e0 = !!(arg & 2);
int e1 = !!(arg & 4);
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DRV_EN, en);
if (err)
return err;
if (!en)
return err;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DRV_E0, e0);
if (err)
return err;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DRV_E1, e1);
if (err)
return err;
return err;
}
EXPORT_SYMBOL_GPL(mtk_pinconf_adv_drive_set);
int mtk_pinconf_adv_drive_get(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, u32 *val)
{
u32 en, e0, e1;
int err;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DRV_EN, &en);
if (err)
return err;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DRV_E0, &e0);
if (err)
return err;
err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DRV_E1, &e1);
if (err)
return err;
*val = (en | e0 << 1 | e1 << 2) & 0x7;
return 0;
}
EXPORT_SYMBOL_GPL(mtk_pinconf_adv_drive_get);
int mtk_pinconf_adv_drive_set_raw(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, u32 arg)
{
return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DRV_ADV, arg);
}
EXPORT_SYMBOL_GPL(mtk_pinconf_adv_drive_set_raw);
int mtk_pinconf_adv_drive_get_raw(struct mtk_pinctrl *hw,
const struct mtk_pin_desc *desc, u32 *val)
{
return mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DRV_ADV, val);
}
EXPORT_SYMBOL_GPL(mtk_pinconf_adv_drive_get_raw);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
MODULE_DESCRIPTION("Pin configuration library module for mediatek SoCs");
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