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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2016 Marvell International Ltd.
* https://spdx.org/licenses
*/
#include <config.h>
#include <fdtdec.h>
#include <errno.h>
#include <dm.h>
#include <log.h>
#include <asm/global_data.h>
#include <dm/pinctrl.h>
#include <dm/root.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/arch-armada8k/soc-info.h>
#include <linux/bitops.h>
#include "pinctrl-mvebu.h"
#define AP_EMMC_PHY_CTRL_REG 0x100
#define CP_EMMC_PHY_CTRL_REG 0x424
#define EMMC_PHY_CTRL_SDPHY_EN BIT(0)
#define AP806_EMMC_CLK_PIN_ID 0
#define AP806_EMMC_CLK_FUNC 0x1
#define CP110_EMMC_CLK_PIN_ID 56
#define CP110_EMMC_CLK_FUNC 0xe
DECLARE_GLOBAL_DATA_PTR;
/* mvebu_pinctl_emmc_set_mux: configure sd/mmc PHY mux
* To enable SDIO/eMMC in Armada-APN806/CP110, need to configure PHY mux.
* eMMC/SD PHY register responsible for muxing between MPPs and SD/eMMC
* controller:
* - Bit0 enabled SDIO/eMMC PHY is used as a MPP muxltiplexer,
* - Bit0 disabled SDIO/eMMC PHY is connected to SDIO/eMMC controller
* If pin function is set to eMMC/SD, then configure the eMMC/SD PHY
* muxltiplexer register to be on SDIO/eMMC controller
*/
void mvebu_pinctl_emmc_set_mux(struct udevice *dev, u32 pin, u32 func)
{
const void *blob = gd->fdt_blob;
int node = dev_of_offset(dev);
struct mvebu_pinctrl_priv *priv = dev_get_priv(dev);
if (!fdt_node_check_compatible(blob, node, "marvell,ap806-pinctrl")) {
if ((pin == AP806_EMMC_CLK_PIN_ID) &&
(func == AP806_EMMC_CLK_FUNC)) {
clrbits_le32(priv->base_reg + AP_EMMC_PHY_CTRL_REG,
EMMC_PHY_CTRL_SDPHY_EN);
}
} else if (!fdt_node_check_compatible(blob, node,
"marvell,armada-8k-cpm-pinctrl") ||
!fdt_node_check_compatible(blob, node,
"marvell,armada-7k-pinctrl")) {
if ((pin == CP110_EMMC_CLK_PIN_ID) &&
(func == CP110_EMMC_CLK_FUNC)) {
clrbits_le32(priv->base_reg + CP_EMMC_PHY_CTRL_REG,
EMMC_PHY_CTRL_SDPHY_EN);
}
}
}
/*
* mvebu_pinctrl_set_state: configure pin functions.
* @dev: the pinctrl device to be configured.
* @config: the state to be configured.
* @return: 0 in success
*/
int mvebu_pinctrl_set_state(struct udevice *dev, struct udevice *config)
{
const void *blob = gd->fdt_blob;
int node = dev_of_offset(config);
struct mvebu_pinctrl_priv *priv;
u32 pin_arr[MVEBU_MAX_PINS_PER_BANK];
u32 function;
int i, pin_count;
priv = dev_get_priv(dev);
pin_count = fdtdec_get_int_array_count(blob, node,
"marvell,pins",
pin_arr,
MVEBU_MAX_PINS_PER_BANK);
if (pin_count <= 0) {
debug("Failed reading pins array for pinconfig %s (%d)\n",
config->name, pin_count);
return -EINVAL;
}
function = fdtdec_get_int(blob, node, "marvell,function", 0xff);
/*
* Check if setup of PHY mux is needed for this pins group.
* Only the first pin id in array is tested, all the rest use the same
* pin function.
*/
mvebu_pinctl_emmc_set_mux(dev, pin_arr[0], function);
for (i = 0; i < pin_count; i++) {
int reg_offset;
int field_offset;
int pin = pin_arr[i];
if (function > priv->max_func) {
debug("Illegal function %d for pinconfig %s\n",
function, config->name);
return -EINVAL;
}
/* Calculate register address and bit in register */
reg_offset = priv->reg_direction * 4 *
(pin >> (PIN_REG_SHIFT));
field_offset = (BITS_PER_PIN) * (pin & PIN_FIELD_MASK);
clrsetbits_le32(priv->base_reg + reg_offset,
PIN_FUNC_MASK << field_offset,
(function & PIN_FUNC_MASK) << field_offset);
}
return 0;
}
/*
* mvebu_pinctrl_set_state_all: configure the entire bank pin functions.
* @dev: the pinctrl device to be configured.
* @config: the state to be configured.
* @return: 0 in success
*/
static int mvebu_pinctrl_set_state_all(struct udevice *dev,
struct udevice *config)
{
const void *blob = gd->fdt_blob;
int node = dev_of_offset(config);
struct mvebu_pinctrl_priv *priv;
u32 func_arr[MVEBU_MAX_PINS_PER_BANK];
int pin, err;
priv = dev_get_priv(dev);
err = fdtdec_get_int_array(blob, node, "pin-func",
func_arr, priv->pin_cnt);
if (err) {
debug("Failed reading pin functions for bank %s\n",
priv->bank_name);
return -EINVAL;
}
/* Check if setup of PHY mux is needed for this pins group. */
if (priv->pin_cnt < CP110_EMMC_CLK_PIN_ID)
mvebu_pinctl_emmc_set_mux(dev, AP806_EMMC_CLK_PIN_ID,
func_arr[AP806_EMMC_CLK_PIN_ID]);
else
mvebu_pinctl_emmc_set_mux(dev, CP110_EMMC_CLK_PIN_ID,
func_arr[CP110_EMMC_CLK_PIN_ID]);
for (pin = 0; pin < priv->pin_cnt; pin++) {
int reg_offset;
int field_offset;
u32 func = func_arr[pin];
/* Bypass pins with function 0xFF */
if (func == 0xff) {
debug("Warning: pin %d value is not modified ", pin);
debug("(kept as default)\n");
continue;
} else if (func > priv->max_func) {
debug("Illegal function %d for pin %d\n", func, pin);
return -EINVAL;
}
/* Calculate register address and bit in register */
reg_offset = priv->reg_direction * 4 *
(pin >> (PIN_REG_SHIFT));
field_offset = (BITS_PER_PIN) * (pin & PIN_FIELD_MASK);
clrsetbits_le32(priv->base_reg + reg_offset,
PIN_FUNC_MASK << field_offset,
(func & PIN_FUNC_MASK) << field_offset);
}
return 0;
}
int mvebu_pinctl_probe(struct udevice *dev)
{
const void *blob = gd->fdt_blob;
int node = dev_of_offset(dev);
struct mvebu_pinctrl_priv *priv;
priv = dev_get_priv(dev);
if (!priv) {
debug("%s: Failed to get private\n", __func__);
return -EINVAL;
}
priv->base_reg = dev_read_addr_ptr(dev);
if (!priv->base_reg) {
debug("%s: Failed to get base address\n", __func__);
return -EINVAL;
}
priv->pin_cnt = fdtdec_get_int(blob, node, "pin-count",
MVEBU_MAX_PINS_PER_BANK);
priv->max_func = fdtdec_get_int(blob, node, "max-func",
MVEBU_MAX_FUNC);
priv->bank_name = fdt_getprop(blob, node, "bank-name", NULL);
priv->reg_direction = 1;
if (fdtdec_get_bool(blob, node, "reverse-reg"))
priv->reg_direction = -1;
return mvebu_pinctrl_set_state_all(dev, dev);
}
static struct pinctrl_ops mvebu_pinctrl_ops = {
.set_state = mvebu_pinctrl_set_state
};
static const struct udevice_id mvebu_pinctrl_ids[] = {
{ .compatible = "marvell,mvebu-pinctrl" },
{ .compatible = "marvell,ap806-pinctrl" },
{ .compatible = "marvell,armada-7k-pinctrl" },
{ .compatible = "marvell,armada-8k-cpm-pinctrl" },
{ .compatible = "marvell,armada-8k-cps-pinctrl" },
{ }
};
U_BOOT_DRIVER(pinctrl_mvebu) = {
.name = "mvebu_pinctrl",
.id = UCLASS_PINCTRL,
.of_match = mvebu_pinctrl_ids,
.priv_auto = sizeof(struct mvebu_pinctrl_priv),
.ops = &mvebu_pinctrl_ops,
.probe = mvebu_pinctl_probe
};
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