drivers/pinctrl/pinctrl-qe-io.c - github/trini/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2006 Freescale Semiconductor, Inc.
  *
  * Dave Liu <daveliu@freescale.com>
  * based on source code of Shlomi Gridish
  */

 #include <linux/errno.h>
 #include <asm/io.h>
 #include <asm/immap_83xx.h>

 #if defined(CONFIG_PINCTRL)
 #include <dm.h>
 #include <dm/device_compat.h>
 #include <dm/pinctrl.h>
 #include <linux/ioport.h>

 /**
  * struct qe_io_plat
  *
  * @base:		Base register address
  * @num_par_io_ports	number of io ports
  */
 struct qe_io_plat {
 	qepio83xx_t *base;
 	u32 num_io_ports;
 };
 #endif

 #define	NUM_OF_PINS	32

 /** qe_cfg_iopin configure one io pin setting
  *
  * @par_io:	pointer to parallel I/O base
  * @port:	io pin port
  * @pin:	io pin number which get configured
  * @dir:	direction of io pin 2 bits valid
  *		00 = pin disabled
  *		01 = output
  *		10 = input
  *		11 = pin is I/O
  * @open_drain:	is pin open drain
  * @assign:	pin assignment registers select the function of the pin
  */
 static void qe_cfg_iopin(qepio83xx_t *par_io, u8 port, u8 pin, int dir,
 			 int open_drain, int assign)
 {
 	u32	dbit_mask;
 	u32	dbit_dir;
 	u32	dbit_asgn;
 	u32	bit_mask;
 	u32	tmp_val;
 	int	offset;

 	offset = (NUM_OF_PINS - (pin % (NUM_OF_PINS / 2) + 1) * 2);

 	/* Calculate pin location and 2bit mask and dir */
 	dbit_mask = (u32)(0x3 << offset);
 	dbit_dir = (u32)(dir << offset);

 	/* Setup the direction */
 	tmp_val = (pin > (NUM_OF_PINS / 2) - 1) ?
 		in_be32(&par_io->ioport[port].dir2) :
 		in_be32(&par_io->ioport[port].dir1);

 	if (pin > (NUM_OF_PINS / 2) - 1) {
 		out_be32(&par_io->ioport[port].dir2, ~dbit_mask & tmp_val);
 		out_be32(&par_io->ioport[port].dir2, dbit_dir | tmp_val);
 	} else {
 		out_be32(&par_io->ioport[port].dir1, ~dbit_mask & tmp_val);
 		out_be32(&par_io->ioport[port].dir1, dbit_dir | tmp_val);
 	}

 	/* Calculate pin location for 1bit mask */
 	bit_mask = (u32)(1 << (NUM_OF_PINS - (pin + 1)));

 	/* Setup the open drain */
 	tmp_val = in_be32(&par_io->ioport[port].podr);
 	if (open_drain)
 		out_be32(&par_io->ioport[port].podr, bit_mask | tmp_val);
 	else
 		out_be32(&par_io->ioport[port].podr, ~bit_mask & tmp_val);

 	/* Setup the assignment */
 	tmp_val = (pin > (NUM_OF_PINS / 2) - 1) ?
 		in_be32(&par_io->ioport[port].ppar2) :
 		in_be32(&par_io->ioport[port].ppar1);
 	dbit_asgn = (u32)(assign << offset);

 	/* Clear and set 2 bits mask */
 	if (pin > (NUM_OF_PINS / 2) - 1) {
 		out_be32(&par_io->ioport[port].ppar2, ~dbit_mask & tmp_val);
 		out_be32(&par_io->ioport[port].ppar2, dbit_asgn | tmp_val);
 	} else {
 		out_be32(&par_io->ioport[port].ppar1, ~dbit_mask & tmp_val);
 		out_be32(&par_io->ioport[port].ppar1, dbit_asgn | tmp_val);
 	}
 }

 #if !defined(CONFIG_PINCTRL)
 /** qe_config_iopin configure one io pin setting
  *
  * @port:	io pin port
  * @pin:	io pin number which get configured
  * @dir:	direction of io pin 2 bits valid
  *		00 = pin disabled
  *		01 = output
  *		10 = input
  *		11 = pin is I/O
  * @open_drain:	is pin open drain
  * @assign:	pin assignment registers select the function of the pin
  */
 void qe_config_iopin(u8 port, u8 pin, int dir, int open_drain, int assign)
 {
 	immap_t        *im = (immap_t *)CONFIG_SYS_IMMR;
 	qepio83xx_t    *par_io = (qepio83xx_t *)&im->qepio;

 	qe_cfg_iopin(par_io, port, pin, dir, open_drain, assign);
 }
 #else
 static int qe_io_of_to_plat(struct udevice *dev)
 {
 	struct qe_io_plat *plat = dev_get_plat(dev);
 	fdt_addr_t addr;

 	addr = dev_read_addr(dev);
 	if (addr == FDT_ADDR_T_NONE)
 		return -EINVAL;

 	plat->base = (qepio83xx_t *)addr;
 	if (dev_read_u32(dev, "num-ports", &plat->num_io_ports))
 		return -EINVAL;

 	return 0;
 }

 /**
  * par_io_of_config_node	config
  * @dev:	pointer to pinctrl device
  * @pio:	ofnode of pinconfig property
  */
 static int par_io_of_config_node(struct udevice *dev, ofnode pio)
 {
 	struct qe_io_plat *plat = dev_get_plat(dev);
 	qepio83xx_t *par_io = plat->base;
 	const unsigned int *pio_map;
 	int pio_map_len;

 	pio_map = ofnode_get_property(pio, "pio-map", &pio_map_len);
 	if (!pio_map)
 		return -ENOENT;

 	pio_map_len /= sizeof(unsigned int);
 	if ((pio_map_len % 6) != 0) {
 		dev_err(dev, "%s: pio-map format wrong!\n", __func__);
 		return -EINVAL;
 	}

 	while (pio_map_len > 0) {
 		/*
 		 * column pio_map[5] from linux (has_irq) not
 		 * supported in u-boot yet.
 		 */
 		qe_cfg_iopin(par_io, (u8)pio_map[0], (u8)pio_map[1],
 			     (int)pio_map[2], (int)pio_map[3],
 			     (int)pio_map[4]);
 		pio_map += 6;
 		pio_map_len -= 6;
 	}
 	return 0;
 }

 int par_io_of_config(struct udevice *dev)
 {
 	u32 phandle;
 	ofnode pio;
 	int err;

 	err = ofnode_read_u32(dev_ofnode(dev), "pio-handle", &phandle);
 	if (err) {
 		dev_err(dev, "%s: pio-handle not available\n", __func__);
 		return err;
 	}

 	pio = ofnode_get_by_phandle(phandle);
 	if (!ofnode_valid(pio)) {
 		dev_err(dev, "%s: unable to find node\n", __func__);
 		return -EINVAL;
 	}

 	/* To Do: find pinctrl device and pass it */
 	return par_io_of_config_node(NULL, pio);
 }

 /*
  * This is not nice!
  * pinsettings should work with "pinctrl-" properties.
  * Unfortunately on mpc83xx powerpc linux device trees
  * devices handle this with "pio-handle" properties ...
  *
  * Even worser, old board code inits all par_io
  * pins in one step, if U-Boot uses the device
  * or not. So init all par_io definitions here too
  * as linux does this also.
  */
 static void config_qe_ioports(struct udevice *dev)
 {
 	ofnode ofn;

 	for (ofn = dev_read_first_subnode(dev); ofnode_valid(ofn);
 	     ofn = dev_read_next_subnode(ofn)) {
 		/*
 		 * ignore errors here, as may the subnode
 		 * has no pio-handle
 		 */
 		par_io_of_config_node(dev, ofn);
 	}
 }

 static int par_io_pinctrl_probe(struct udevice *dev)
 {
 	config_qe_ioports(dev);

 	return 0;
 }

 static int par_io_pinctrl_set_state(struct udevice *dev, struct udevice *config)
 {
 	return 0;
 }

 const struct pinctrl_ops par_io_pinctrl_ops = {
 	.set_state = par_io_pinctrl_set_state,
 };

 static const struct udevice_id par_io_pinctrl_match[] = {
 	{ .compatible = "fsl,mpc8360-par_io"},
 	{ /* sentinel */ }
 };

 U_BOOT_DRIVER(par_io_pinctrl) = {
 	.name = "par-io-pinctrl",
 	.id = UCLASS_PINCTRL,
 	.of_match = of_match_ptr(par_io_pinctrl_match),
 	.probe = par_io_pinctrl_probe,
 	.of_to_plat = qe_io_of_to_plat,
 	.plat_auto	= sizeof(struct qe_io_plat),
 	.ops = &par_io_pinctrl_ops,
 #if CONFIG_IS_ENABLED(OF_REAL)
 	.flags	= DM_FLAG_PRE_RELOC,
 #endif
 };
 #endif
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright (C) 2006 Freescale Semiconductor, Inc.
	*
	* Dave Liu <daveliu@freescale.com>
	* based on source code of Shlomi Gridish
	*/

	#include <linux/errno.h>
	#include <asm/io.h>
	#include <asm/immap_83xx.h>

	#if defined(CONFIG_PINCTRL)
	#include <dm.h>
	#include <dm/device_compat.h>
	#include <dm/pinctrl.h>
	#include <linux/ioport.h>

	/**
	* struct qe_io_plat
	*
	* @base: Base register address
	* @num_par_io_ports number of io ports
	*/
	struct qe_io_plat {
	qepio83xx_t *base;
	u32 num_io_ports;
	};
	#endif

	#define NUM_OF_PINS 32

	/** qe_cfg_iopin configure one io pin setting
	*
	* @par_io: pointer to parallel I/O base
	* @port: io pin port
	* @pin: io pin number which get configured
	* @dir: direction of io pin 2 bits valid
	* 00 = pin disabled
	* 01 = output
	* 10 = input
	* 11 = pin is I/O
	* @open_drain: is pin open drain
	* @assign: pin assignment registers select the function of the pin
	*/
	static void qe_cfg_iopin(qepio83xx_t *par_io, u8 port, u8 pin, int dir,
	int open_drain, int assign)
	{
	u32 dbit_mask;
	u32 dbit_dir;
	u32 dbit_asgn;
	u32 bit_mask;
	u32 tmp_val;
	int offset;

	offset = (NUM_OF_PINS - (pin % (NUM_OF_PINS / 2) + 1) * 2);

	/* Calculate pin location and 2bit mask and dir */
	dbit_mask = (u32)(0x3 << offset);
	dbit_dir = (u32)(dir << offset);

	/* Setup the direction */
	tmp_val = (pin > (NUM_OF_PINS / 2) - 1) ?
	in_be32(&par_io->ioport[port].dir2) :
	in_be32(&par_io->ioport[port].dir1);

	if (pin > (NUM_OF_PINS / 2) - 1) {
	out_be32(&par_io->ioport[port].dir2, ~dbit_mask & tmp_val);
	out_be32(&par_io->ioport[port].dir2, dbit_dir \| tmp_val);
	} else {
	out_be32(&par_io->ioport[port].dir1, ~dbit_mask & tmp_val);
	out_be32(&par_io->ioport[port].dir1, dbit_dir \| tmp_val);
	}

	/* Calculate pin location for 1bit mask */
	bit_mask = (u32)(1 << (NUM_OF_PINS - (pin + 1)));

	/* Setup the open drain */
	tmp_val = in_be32(&par_io->ioport[port].podr);
	if (open_drain)
	out_be32(&par_io->ioport[port].podr, bit_mask \| tmp_val);
	else
	out_be32(&par_io->ioport[port].podr, ~bit_mask & tmp_val);

	/* Setup the assignment */
	tmp_val = (pin > (NUM_OF_PINS / 2) - 1) ?
	in_be32(&par_io->ioport[port].ppar2) :
	in_be32(&par_io->ioport[port].ppar1);
	dbit_asgn = (u32)(assign << offset);

	/* Clear and set 2 bits mask */
	if (pin > (NUM_OF_PINS / 2) - 1) {
	out_be32(&par_io->ioport[port].ppar2, ~dbit_mask & tmp_val);
	out_be32(&par_io->ioport[port].ppar2, dbit_asgn \| tmp_val);
	} else {
	out_be32(&par_io->ioport[port].ppar1, ~dbit_mask & tmp_val);
	out_be32(&par_io->ioport[port].ppar1, dbit_asgn \| tmp_val);
	}
	}

	#if !defined(CONFIG_PINCTRL)
	/** qe_config_iopin configure one io pin setting
	*
	* @port: io pin port
	* @pin: io pin number which get configured
	* @dir: direction of io pin 2 bits valid
	* 00 = pin disabled
	* 01 = output
	* 10 = input
	* 11 = pin is I/O
	* @open_drain: is pin open drain
	* @assign: pin assignment registers select the function of the pin
	*/
	void qe_config_iopin(u8 port, u8 pin, int dir, int open_drain, int assign)
	{
	immap_t im = (immap_t )CONFIG_SYS_IMMR;
	qepio83xx_t par_io = (qepio83xx_t )&im->qepio;

	qe_cfg_iopin(par_io, port, pin, dir, open_drain, assign);
	}
	#else
	static int qe_io_of_to_plat(struct udevice *dev)
	{
	struct qe_io_plat *plat = dev_get_plat(dev);
	fdt_addr_t addr;

	addr = dev_read_addr(dev);
	if (addr == FDT_ADDR_T_NONE)
	return -EINVAL;

	plat->base = (qepio83xx_t *)addr;
	if (dev_read_u32(dev, "num-ports", &plat->num_io_ports))
	return -EINVAL;

	return 0;
	}

	/**
	* par_io_of_config_node config
	* @dev: pointer to pinctrl device
	* @pio: ofnode of pinconfig property
	*/
	static int par_io_of_config_node(struct udevice *dev, ofnode pio)
	{
	struct qe_io_plat *plat = dev_get_plat(dev);
	qepio83xx_t *par_io = plat->base;
	const unsigned int *pio_map;
	int pio_map_len;

	pio_map = ofnode_get_property(pio, "pio-map", &pio_map_len);
	if (!pio_map)
	return -ENOENT;

	pio_map_len /= sizeof(unsigned int);
	if ((pio_map_len % 6) != 0) {
	dev_err(dev, "%s: pio-map format wrong!\n", __func__);
	return -EINVAL;
	}

	while (pio_map_len > 0) {
	/*
	* column pio_map[5] from linux (has_irq) not
	* supported in u-boot yet.
	*/
	qe_cfg_iopin(par_io, (u8)pio_map[0], (u8)pio_map[1],
	(int)pio_map[2], (int)pio_map[3],
	(int)pio_map[4]);
	pio_map += 6;
	pio_map_len -= 6;
	}
	return 0;
	}

	int par_io_of_config(struct udevice *dev)
	{
	u32 phandle;
	ofnode pio;
	int err;

	err = ofnode_read_u32(dev_ofnode(dev), "pio-handle", &phandle);
	if (err) {
	dev_err(dev, "%s: pio-handle not available\n", __func__);
	return err;
	}

	pio = ofnode_get_by_phandle(phandle);
	if (!ofnode_valid(pio)) {
	dev_err(dev, "%s: unable to find node\n", __func__);
	return -EINVAL;
	}

	/* To Do: find pinctrl device and pass it */
	return par_io_of_config_node(NULL, pio);
	}

	/*
	* This is not nice!
	* pinsettings should work with "pinctrl-" properties.
	* Unfortunately on mpc83xx powerpc linux device trees
	* devices handle this with "pio-handle" properties ...
	*
	* Even worser, old board code inits all par_io
	* pins in one step, if U-Boot uses the device
	* or not. So init all par_io definitions here too
	* as linux does this also.
	*/
	static void config_qe_ioports(struct udevice *dev)
	{
	ofnode ofn;

	for (ofn = dev_read_first_subnode(dev); ofnode_valid(ofn);
	ofn = dev_read_next_subnode(ofn)) {
	/*
	* ignore errors here, as may the subnode
	* has no pio-handle
	*/
	par_io_of_config_node(dev, ofn);
	}
	}

	static int par_io_pinctrl_probe(struct udevice *dev)
	{
	config_qe_ioports(dev);

	return 0;
	}

	static int par_io_pinctrl_set_state(struct udevice dev, struct udevice config)
	{
	return 0;
	}

	const struct pinctrl_ops par_io_pinctrl_ops = {
	.set_state = par_io_pinctrl_set_state,
	};

	static const struct udevice_id par_io_pinctrl_match[] = {
	{ .compatible = "fsl,mpc8360-par_io"},
	{ /* sentinel */ }
	};

	U_BOOT_DRIVER(par_io_pinctrl) = {
	.name = "par-io-pinctrl",
	.id = UCLASS_PINCTRL,
	.of_match = of_match_ptr(par_io_pinctrl_match),
	.probe = par_io_pinctrl_probe,
	.of_to_plat = qe_io_of_to_plat,
	.plat_auto = sizeof(struct qe_io_plat),
	.ops = &par_io_pinctrl_ops,
	#if CONFIG_IS_ENABLED(OF_REAL)
	.flags = DM_FLAG_PRE_RELOC,
	#endif
	};
	#endif