[deliverable/linux.git] / drivers / sh / pfc / pinctrl.c

/*
 * SuperH Pin Function Controller pinmux support.
 *
 * Copyright (C) 2012  Paul Mundt
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#define DRV_NAME "sh-pfc"
#define pr_fmt(fmt) KBUILD_MODNAME " pinctrl: " fmt

#include <linux/init.h>
#include <linux/module.h>
#include <linux/sh_pfc.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pinctrl/pinconf-generic.h>

#include "core.h"

struct sh_pfc_pinctrl {
	struct pinctrl_dev *pctl;
	struct sh_pfc *pfc;

	struct pinmux_gpio **functions;
	unsigned int nr_functions;

	struct pinctrl_pin_desc *pads;
	unsigned int nr_pads;

	spinlock_t lock;
};

static int sh_pfc_get_groups_count(struct pinctrl_dev *pctldev)
{
	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);

	return pmx->nr_pads;
}

static const char *sh_pfc_get_group_name(struct pinctrl_dev *pctldev,
					 unsigned selector)
{
	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);

	return pmx->pads[selector].name;
}

static int sh_pfc_get_group_pins(struct pinctrl_dev *pctldev, unsigned group,
				 const unsigned **pins, unsigned *num_pins)
{
	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);

	*pins = &pmx->pads[group].number;
	*num_pins = 1;

	return 0;
}

static void sh_pfc_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
				unsigned offset)
{
	seq_printf(s, "%s", DRV_NAME);
}

static struct pinctrl_ops sh_pfc_pinctrl_ops = {
	.get_groups_count	= sh_pfc_get_groups_count,
	.get_group_name		= sh_pfc_get_group_name,
	.get_group_pins		= sh_pfc_get_group_pins,
	.pin_dbg_show		= sh_pfc_pin_dbg_show,
};

static int sh_pfc_get_functions_count(struct pinctrl_dev *pctldev)
{
	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);

	return pmx->nr_functions;
}

static const char *sh_pfc_get_function_name(struct pinctrl_dev *pctldev,
					    unsigned selector)
{
	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);

	return pmx->functions[selector]->name;
}

static int sh_pfc_get_function_groups(struct pinctrl_dev *pctldev, unsigned func,
				      const char * const **groups,
				      unsigned * const num_groups)
{
	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);

	*groups = &pmx->functions[func]->name;
	*num_groups = 1;

	return 0;
}

static int sh_pfc_noop_enable(struct pinctrl_dev *pctldev, unsigned func,
			      unsigned group)
{
	return 0;
}

static void sh_pfc_noop_disable(struct pinctrl_dev *pctldev, unsigned func,
				unsigned group)
{
}

static inline int sh_pfc_config_function(struct sh_pfc *pfc, unsigned offset)
{
	if (sh_pfc_config_gpio(pfc, offset,
			       PINMUX_TYPE_FUNCTION,
			       GPIO_CFG_DRYRUN) != 0)
		return -EINVAL;

	if (sh_pfc_config_gpio(pfc, offset,
			       PINMUX_TYPE_FUNCTION,
			       GPIO_CFG_REQ) != 0)
		return -EINVAL;

	return 0;
}

static int sh_pfc_reconfig_pin(struct sh_pfc *pfc, unsigned offset,
			       int new_type)
{
	unsigned long flags;
	int pinmux_type;
	int ret = -EINVAL;

	spin_lock_irqsave(&pfc->lock, flags);

	pinmux_type = pfc->pdata->gpios[offset].flags & PINMUX_FLAG_TYPE;

	/*
	 * See if the present config needs to first be de-configured.
	 */
	switch (pinmux_type) {
	case PINMUX_TYPE_GPIO:
		break;
	case PINMUX_TYPE_OUTPUT:
	case PINMUX_TYPE_INPUT:
	case PINMUX_TYPE_INPUT_PULLUP:
	case PINMUX_TYPE_INPUT_PULLDOWN:
		sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE);
		break;
	default:
		goto err;
	}

	/*
	 * Dry run
	 */
	if (sh_pfc_config_gpio(pfc, offset, new_type,
			       GPIO_CFG_DRYRUN) != 0)
		goto err;

	/*
	 * Request
	 */
	if (sh_pfc_config_gpio(pfc, offset, new_type,
			       GPIO_CFG_REQ) != 0)
		goto err;

	pfc->pdata->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
	pfc->pdata->gpios[offset].flags |= new_type;

	ret = 0;

err:
	spin_unlock_irqrestore(&pfc->lock, flags);

	return ret;
}


static int sh_pfc_gpio_request_enable(struct pinctrl_dev *pctldev,
				      struct pinctrl_gpio_range *range,
				      unsigned offset)
{
	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
	struct sh_pfc *pfc = pmx->pfc;
	unsigned long flags;
	int ret, pinmux_type;

	spin_lock_irqsave(&pfc->lock, flags);

	pinmux_type = pfc->pdata->gpios[offset].flags & PINMUX_FLAG_TYPE;

	switch (pinmux_type) {
	case PINMUX_TYPE_FUNCTION:
		pr_notice_once("Use of GPIO API for function requests is "
			       "deprecated, convert to pinctrl\n");
		/* handle for now */
		ret = sh_pfc_config_function(pfc, offset);
		if (unlikely(ret < 0))
			goto err;

		break;
	case PINMUX_TYPE_GPIO:
	case PINMUX_TYPE_INPUT:
	case PINMUX_TYPE_OUTPUT:
		break;
	default:
		pr_err("Unsupported mux type (%d), bailing...\n", pinmux_type);
		ret = -ENOTSUPP;
		goto err;
	}

	ret = 0;

err:
	spin_unlock_irqrestore(&pfc->lock, flags);

	return ret;
}

static void sh_pfc_gpio_disable_free(struct pinctrl_dev *pctldev,
				     struct pinctrl_gpio_range *range,
				     unsigned offset)
{
	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
	struct sh_pfc *pfc = pmx->pfc;
	unsigned long flags;
	int pinmux_type;

	spin_lock_irqsave(&pfc->lock, flags);

	pinmux_type = pfc->pdata->gpios[offset].flags & PINMUX_FLAG_TYPE;

	sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE);

	spin_unlock_irqrestore(&pfc->lock, flags);
}

static int sh_pfc_gpio_set_direction(struct pinctrl_dev *pctldev,
				     struct pinctrl_gpio_range *range,
				     unsigned offset, bool input)
{
	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
	int type = input ? PINMUX_TYPE_INPUT : PINMUX_TYPE_OUTPUT;

	return sh_pfc_reconfig_pin(pmx->pfc, offset, type);
}

static struct pinmux_ops sh_pfc_pinmux_ops = {
	.get_functions_count	= sh_pfc_get_functions_count,
	.get_function_name	= sh_pfc_get_function_name,
	.get_function_groups	= sh_pfc_get_function_groups,
	.enable			= sh_pfc_noop_enable,
	.disable		= sh_pfc_noop_disable,
	.gpio_request_enable	= sh_pfc_gpio_request_enable,
	.gpio_disable_free	= sh_pfc_gpio_disable_free,
	.gpio_set_direction	= sh_pfc_gpio_set_direction,
};

static int sh_pfc_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin,
			      unsigned long *config)
{
	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
	struct sh_pfc *pfc = pmx->pfc;

	*config = pfc->pdata->gpios[pin].flags & PINMUX_FLAG_TYPE;

	return 0;
}

static int sh_pfc_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin,
			      unsigned long config)
{
	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);

	/* Validate the new type */
	if (config >= PINMUX_FLAG_TYPE)
		return -EINVAL;

	return sh_pfc_reconfig_pin(pmx->pfc, pin, config);
}

static void sh_pfc_pinconf_dbg_show(struct pinctrl_dev *pctldev,
				    struct seq_file *s, unsigned pin)
{
	const char *pinmux_type_str[] = {
		[PINMUX_TYPE_NONE]		= "none",
		[PINMUX_TYPE_FUNCTION]		= "function",
		[PINMUX_TYPE_GPIO]		= "gpio",
		[PINMUX_TYPE_OUTPUT]		= "output",
		[PINMUX_TYPE_INPUT]		= "input",
		[PINMUX_TYPE_INPUT_PULLUP]	= "input bias pull up",
		[PINMUX_TYPE_INPUT_PULLDOWN]	= "input bias pull down",
	};
	unsigned long config;
	int rc;

	rc = sh_pfc_pinconf_get(pctldev, pin, &config);
	if (unlikely(rc != 0))
		return;

	seq_printf(s, " %s", pinmux_type_str[config]);
}

static struct pinconf_ops sh_pfc_pinconf_ops = {
	.pin_config_get		= sh_pfc_pinconf_get,
	.pin_config_set		= sh_pfc_pinconf_set,
	.pin_config_dbg_show	= sh_pfc_pinconf_dbg_show,
};

static struct pinctrl_gpio_range sh_pfc_gpio_range = {
	.name		= DRV_NAME,
	.id		= 0,
};

static struct pinctrl_desc sh_pfc_pinctrl_desc = {
	.name		= DRV_NAME,
	.owner		= THIS_MODULE,
	.pctlops	= &sh_pfc_pinctrl_ops,
	.pmxops		= &sh_pfc_pinmux_ops,
	.confops	= &sh_pfc_pinconf_ops,
};

static inline void sh_pfc_map_one_gpio(struct sh_pfc *pfc,
				       struct sh_pfc_pinctrl *pmx,
				       struct pinmux_gpio *gpio,
				       unsigned offset)
{
	struct pinmux_data_reg *dummy;
	unsigned long flags;
	int bit;

	gpio->flags &= ~PINMUX_FLAG_TYPE;

	if (sh_pfc_get_data_reg(pfc, offset, &dummy, &bit) == 0)
		gpio->flags |= PINMUX_TYPE_GPIO;
	else {
		gpio->flags |= PINMUX_TYPE_FUNCTION;

		spin_lock_irqsave(&pmx->lock, flags);
		pmx->nr_functions++;
		spin_unlock_irqrestore(&pmx->lock, flags);
	}
}

/* pinmux ranges -> pinctrl pin descs */
static int sh_pfc_map_gpios(struct sh_pfc *pfc, struct sh_pfc_pinctrl *pmx)
{
	unsigned long flags;
	int i;

	pmx->nr_pads = pfc->pdata->last_gpio - pfc->pdata->first_gpio + 1;

	pmx->pads = kmalloc(sizeof(struct pinctrl_pin_desc) * pmx->nr_pads,
			    GFP_KERNEL);
	if (unlikely(!pmx->pads)) {
		pmx->nr_pads = 0;
		return -ENOMEM;
	}

	spin_lock_irqsave(&pfc->lock, flags);

	/*
	 * We don't necessarily have a 1:1 mapping between pin and linux
	 * GPIO number, as the latter maps to the associated enum_id.
	 * Care needs to be taken to translate back to pin space when
	 * dealing with any pin configurations.
	 */
	for (i = 0; i < pmx->nr_pads; i++) {
		struct pinctrl_pin_desc *pin = pmx->pads + i;
		struct pinmux_gpio *gpio = pfc->pdata->gpios + i;

		pin->number = pfc->pdata->first_gpio + i;
		pin->name = gpio->name;

		/* XXX */
		if (unlikely(!gpio->enum_id))
			continue;

		sh_pfc_map_one_gpio(pfc, pmx, gpio, i);
	}

	spin_unlock_irqrestore(&pfc->lock, flags);

	sh_pfc_pinctrl_desc.pins = pmx->pads;
	sh_pfc_pinctrl_desc.npins = pmx->nr_pads;

	return 0;
}

static int sh_pfc_map_functions(struct sh_pfc *pfc, struct sh_pfc_pinctrl *pmx)
{
	unsigned long flags;
	int i, fn;

	pmx->functions = kzalloc(pmx->nr_functions * sizeof(void *),
				 GFP_KERNEL);
	if (unlikely(!pmx->functions))
		return -ENOMEM;

	spin_lock_irqsave(&pmx->lock, flags);

	for (i = fn = 0; i < pmx->nr_pads; i++) {
		struct pinmux_gpio *gpio = pfc->pdata->gpios + i;

		if ((gpio->flags & PINMUX_FLAG_TYPE) == PINMUX_TYPE_FUNCTION)
			pmx->functions[fn++] = gpio;
	}

	spin_unlock_irqrestore(&pmx->lock, flags);

	return 0;
}

int sh_pfc_register_pinctrl(struct sh_pfc *pfc)
{
	struct sh_pfc_pinctrl *pmx;
	int ret;

	pmx = kzalloc(sizeof(struct sh_pfc_pinctrl), GFP_KERNEL);
	if (unlikely(!pmx))
		return -ENOMEM;

	spin_lock_init(&pmx->lock);

	pmx->pfc = pfc;
	pfc->pinctrl = pmx;

	ret = sh_pfc_map_gpios(pfc, pmx);
	if (unlikely(ret != 0))
		return ret;

	ret = sh_pfc_map_functions(pfc, pmx);
	if (unlikely(ret != 0))
		goto free_pads;

	pmx->pctl = pinctrl_register(&sh_pfc_pinctrl_desc, pfc->dev, pmx);
	if (IS_ERR(pmx->pctl)) {
		ret = PTR_ERR(pmx->pctl);
		goto free_functions;
	}

	sh_pfc_gpio_range.npins = pfc->pdata->last_gpio
				- pfc->pdata->first_gpio + 1;
	sh_pfc_gpio_range.base = pfc->pdata->first_gpio;
	sh_pfc_gpio_range.pin_base = pfc->pdata->first_gpio;

	pinctrl_add_gpio_range(pmx->pctl, &sh_pfc_gpio_range);

	return 0;

free_functions:
	kfree(pmx->functions);
free_pads:
	kfree(pmx->pads);
	kfree(pmx);

	return ret;
}

int sh_pfc_unregister_pinctrl(struct sh_pfc *pfc)
{
	struct sh_pfc_pinctrl *pmx = pfc->pinctrl;

	pinctrl_unregister(pmx->pctl);

	kfree(pmx->functions);
	kfree(pmx->pads);
	kfree(pmx);

	pfc->pinctrl = NULL;
	return 0;
}
Commit	Line	Data
ca5481c6 PM	1	/*
	2	* SuperH Pin Function Controller pinmux support.
	3	*
	4	* Copyright (C) 2012 Paul Mundt
	5	*
	6	* This file is subject to the terms and conditions of the GNU General Public
	7	* License. See the file "COPYING" in the main directory of this archive
	8	* for more details.
	9	*/
54407110	10
c6193eac	11	#define DRV_NAME "sh-pfc"
f9492fda	12	#define pr_fmt(fmt) KBUILD_MODNAME " pinctrl: " fmt
ca5481c6 PM	13
	14	#include <linux/init.h>
	15	#include <linux/module.h>
	16	#include <linux/sh_pfc.h>
	17	#include <linux/err.h>
	18	#include <linux/slab.h>
d93a891f	19	#include <linux/spinlock.h>
ca5481c6 PM	20	#include <linux/pinctrl/consumer.h>
	21	#include <linux/pinctrl/pinctrl.h>
	22	#include <linux/pinctrl/pinconf.h>
	23	#include <linux/pinctrl/pinmux.h>
	24	#include <linux/pinctrl/pinconf-generic.h>
	25
f9165132 LP	26	#include "core.h"
f9165132 LP	27
ca5481c6 PM	28	struct sh_pfc_pinctrl {
	29	struct pinctrl_dev *pctl;
	30	struct sh_pfc *pfc;
	31
d93a891f PM	32	struct pinmux_gpio **functions;
	33	unsigned int nr_functions;
	34
ca5481c6 PM	35	struct pinctrl_pin_desc *pads;
ca5481c6 PM	36	unsigned int nr_pads;
d93a891f PM	37
d93a891f PM	38	spinlock_t lock;
ca5481c6 PM	39	};
ca5481c6 PM	40
e3f805e8	41	static int sh_pfc_get_groups_count(struct pinctrl_dev *pctldev)
ca5481c6	42	{
e3f805e8 PM	43	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
	44
	45	return pmx->nr_pads;
ca5481c6 PM	46	}
ca5481c6 PM	47
e3f805e8	48	static const char sh_pfc_get_group_name(struct pinctrl_dev pctldev,
ca5481c6 PM	49	unsigned selector)
ca5481c6 PM	50	{
e3f805e8 PM	51	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
	52
	53	return pmx->pads[selector].name;
ca5481c6 PM	54	}
	55
	56	static int sh_pfc_get_group_pins(struct pinctrl_dev *pctldev, unsigned group,
	57	const unsigned *pins, unsigned num_pins)
	58	{
e3f805e8 PM	59	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
	60
	61	*pins = &pmx->pads[group].number;
	62	*num_pins = 1;
	63
	64	return 0;
ca5481c6 PM	65	}
ca5481c6 PM	66
fdd85ec3 PM	67	static void sh_pfc_pin_dbg_show(struct pinctrl_dev pctldev, struct seq_file s,
	68	unsigned offset)
	69	{
	70	seq_printf(s, "%s", DRV_NAME);
	71	}
	72
ca5481c6	73	static struct pinctrl_ops sh_pfc_pinctrl_ops = {
e3f805e8 PM	74	.get_groups_count = sh_pfc_get_groups_count,
e3f805e8 PM	75	.get_group_name = sh_pfc_get_group_name,
ca5481c6	76	.get_group_pins = sh_pfc_get_group_pins,
fdd85ec3	77	.pin_dbg_show = sh_pfc_pin_dbg_show,
ca5481c6 PM	78	};
ca5481c6 PM	79
d93a891f PM	80	static int sh_pfc_get_functions_count(struct pinctrl_dev *pctldev)
	81	{
	82	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
	83
	84	return pmx->nr_functions;
	85	}
	86
	87	static const char sh_pfc_get_function_name(struct pinctrl_dev pctldev,
	88	unsigned selector)
	89	{
	90	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
	91
	92	return pmx->functions[selector]->name;
	93	}
ca5481c6	94
ca5481c6 PM	95	static int sh_pfc_get_function_groups(struct pinctrl_dev *pctldev, unsigned func,
	96	const char * const **groups,
	97	unsigned * const num_groups)
	98	{
d93a891f PM	99	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
	100
	101	*groups = &pmx->functions[func]->name;
	102	*num_groups = 1;
	103
ca5481c6 PM	104	return 0;
	105	}
	106
	107	static int sh_pfc_noop_enable(struct pinctrl_dev *pctldev, unsigned func,
	108	unsigned group)
	109	{
	110	return 0;
	111	}
	112
	113	static void sh_pfc_noop_disable(struct pinctrl_dev *pctldev, unsigned func,
	114	unsigned group)
	115	{
	116	}
	117
d93a891f PM	118	static inline int sh_pfc_config_function(struct sh_pfc *pfc, unsigned offset)
	119	{
	120	if (sh_pfc_config_gpio(pfc, offset,
	121	PINMUX_TYPE_FUNCTION,
	122	GPIO_CFG_DRYRUN) != 0)
	123	return -EINVAL;
	124
	125	if (sh_pfc_config_gpio(pfc, offset,
	126	PINMUX_TYPE_FUNCTION,
	127	GPIO_CFG_REQ) != 0)
	128	return -EINVAL;
	129
	130	return 0;
	131	}
	132
fdd85ec3 PM	133	static int sh_pfc_reconfig_pin(struct sh_pfc *pfc, unsigned offset,
	134	int new_type)
	135	{
	136	unsigned long flags;
	137	int pinmux_type;
	138	int ret = -EINVAL;
	139
	140	spin_lock_irqsave(&pfc->lock, flags);
	141
d4e62d00	142	pinmux_type = pfc->pdata->gpios[offset].flags & PINMUX_FLAG_TYPE;
fdd85ec3 PM	143
	144	/*
	145	* See if the present config needs to first be de-configured.
	146	*/
	147	switch (pinmux_type) {
	148	case PINMUX_TYPE_GPIO:
	149	break;
	150	case PINMUX_TYPE_OUTPUT:
	151	case PINMUX_TYPE_INPUT:
	152	case PINMUX_TYPE_INPUT_PULLUP:
	153	case PINMUX_TYPE_INPUT_PULLDOWN:
	154	sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE);
	155	break;
	156	default:
	157	goto err;
	158	}
	159
	160	/*
	161	* Dry run
	162	*/
	163	if (sh_pfc_config_gpio(pfc, offset, new_type,
	164	GPIO_CFG_DRYRUN) != 0)
	165	goto err;
	166
	167	/*
	168	* Request
	169	*/
	170	if (sh_pfc_config_gpio(pfc, offset, new_type,
	171	GPIO_CFG_REQ) != 0)
	172	goto err;
	173
d4e62d00 LP	174	pfc->pdata->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
d4e62d00 LP	175	pfc->pdata->gpios[offset].flags \|= new_type;
fdd85ec3 PM	176
	177	ret = 0;
	178
	179	err:
	180	spin_unlock_irqrestore(&pfc->lock, flags);
	181
	182	return ret;
	183	}
	184
	185
ca5481c6 PM	186	static int sh_pfc_gpio_request_enable(struct pinctrl_dev *pctldev,
	187	struct pinctrl_gpio_range *range,
	188	unsigned offset)
	189	{
	190	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
	191	struct sh_pfc *pfc = pmx->pfc;
ca5481c6	192	unsigned long flags;
d93a891f	193	int ret, pinmux_type;
ca5481c6 PM	194
	195	spin_lock_irqsave(&pfc->lock, flags);
	196
d4e62d00	197	pinmux_type = pfc->pdata->gpios[offset].flags & PINMUX_FLAG_TYPE;
ca5481c6	198
d93a891f PM	199	switch (pinmux_type) {
	200	case PINMUX_TYPE_FUNCTION:
	201	pr_notice_once("Use of GPIO API for function requests is "
	202	"deprecated, convert to pinctrl\n");
	203	/* handle for now */
	204	ret = sh_pfc_config_function(pfc, offset);
	205	if (unlikely(ret < 0))
ca5481c6	206	goto err;
ca5481c6	207
d93a891f PM	208	break;
d93a891f PM	209	case PINMUX_TYPE_GPIO:
16d74ebe PM	210	case PINMUX_TYPE_INPUT:
16d74ebe PM	211	case PINMUX_TYPE_OUTPUT:
d93a891f PM	212	break;
	213	default:
	214	pr_err("Unsupported mux type (%d), bailing...\n", pinmux_type);
077664a2 LP	215	ret = -ENOTSUPP;
077664a2 LP	216	goto err;
d93a891f	217	}
ca5481c6 PM	218
	219	ret = 0;
	220
	221	err:
	222	spin_unlock_irqrestore(&pfc->lock, flags);
	223
	224	return ret;
	225	}
	226
	227	static void sh_pfc_gpio_disable_free(struct pinctrl_dev *pctldev,
	228	struct pinctrl_gpio_range *range,
	229	unsigned offset)
	230	{
	231	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
	232	struct sh_pfc *pfc = pmx->pfc;
	233	unsigned long flags;
	234	int pinmux_type;
	235
	236	spin_lock_irqsave(&pfc->lock, flags);
	237
d4e62d00	238	pinmux_type = pfc->pdata->gpios[offset].flags & PINMUX_FLAG_TYPE;
ca5481c6 PM	239
	240	sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE);
	241
ca5481c6 PM	242	spin_unlock_irqrestore(&pfc->lock, flags);
	243	}
	244
	245	static int sh_pfc_gpio_set_direction(struct pinctrl_dev *pctldev,
	246	struct pinctrl_gpio_range *range,
	247	unsigned offset, bool input)
	248	{
	249	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
fdd85ec3	250	int type = input ? PINMUX_TYPE_INPUT : PINMUX_TYPE_OUTPUT;
ca5481c6	251
fdd85ec3	252	return sh_pfc_reconfig_pin(pmx->pfc, offset, type);
ca5481c6 PM	253	}
	254
	255	static struct pinmux_ops sh_pfc_pinmux_ops = {
d93a891f PM	256	.get_functions_count = sh_pfc_get_functions_count,
d93a891f PM	257	.get_function_name = sh_pfc_get_function_name,
ca5481c6 PM	258	.get_function_groups = sh_pfc_get_function_groups,
	259	.enable = sh_pfc_noop_enable,
	260	.disable = sh_pfc_noop_disable,
	261	.gpio_request_enable = sh_pfc_gpio_request_enable,
	262	.gpio_disable_free = sh_pfc_gpio_disable_free,
	263	.gpio_set_direction = sh_pfc_gpio_set_direction,
	264	};
	265
	266	static int sh_pfc_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin,
	267	unsigned long *config)
	268	{
fdd85ec3 PM	269	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
fdd85ec3 PM	270	struct sh_pfc *pfc = pmx->pfc;
d93a891f	271
d4e62d00	272	*config = pfc->pdata->gpios[pin].flags & PINMUX_FLAG_TYPE;
d93a891f	273
fdd85ec3	274	return 0;
ca5481c6 PM	275	}
	276
	277	static int sh_pfc_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin,
	278	unsigned long config)
	279	{
fdd85ec3	280	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
fdd85ec3 PM	281
	282	/* Validate the new type */
	283	if (config >= PINMUX_FLAG_TYPE)
	284	return -EINVAL;
	285
	286	return sh_pfc_reconfig_pin(pmx->pfc, pin, config);
	287	}
	288
	289	static void sh_pfc_pinconf_dbg_show(struct pinctrl_dev *pctldev,
	290	struct seq_file *s, unsigned pin)
	291	{
	292	const char *pinmux_type_str[] = {
	293	[PINMUX_TYPE_NONE] = "none",
	294	[PINMUX_TYPE_FUNCTION] = "function",
	295	[PINMUX_TYPE_GPIO] = "gpio",
	296	[PINMUX_TYPE_OUTPUT] = "output",
	297	[PINMUX_TYPE_INPUT] = "input",
	298	[PINMUX_TYPE_INPUT_PULLUP] = "input bias pull up",
	299	[PINMUX_TYPE_INPUT_PULLDOWN] = "input bias pull down",
	300	};
	301	unsigned long config;
	302	int rc;
	303
	304	rc = sh_pfc_pinconf_get(pctldev, pin, &config);
	305	if (unlikely(rc != 0))
	306	return;
	307
	308	seq_printf(s, " %s", pinmux_type_str[config]);
ca5481c6 PM	309	}
	310
	311	static struct pinconf_ops sh_pfc_pinconf_ops = {
ca5481c6 PM	312	.pin_config_get = sh_pfc_pinconf_get,
ca5481c6 PM	313	.pin_config_set = sh_pfc_pinconf_set,
fdd85ec3	314	.pin_config_dbg_show = sh_pfc_pinconf_dbg_show,
ca5481c6 PM	315	};
	316
	317	static struct pinctrl_gpio_range sh_pfc_gpio_range = {
54407110	318	.name = DRV_NAME,
ca5481c6 PM	319	.id = 0,
	320	};
	321
	322	static struct pinctrl_desc sh_pfc_pinctrl_desc = {
54407110	323	.name = DRV_NAME,
ca5481c6 PM	324	.owner = THIS_MODULE,
	325	.pctlops = &sh_pfc_pinctrl_ops,
	326	.pmxops = &sh_pfc_pinmux_ops,
	327	.confops = &sh_pfc_pinconf_ops,
	328	};
	329
0fe763c5 GKH	330	static inline void sh_pfc_map_one_gpio(struct sh_pfc *pfc,
	331	struct sh_pfc_pinctrl *pmx,
	332	struct pinmux_gpio *gpio,
	333	unsigned offset)
d93a891f PM	334	{
	335	struct pinmux_data_reg *dummy;
	336	unsigned long flags;
	337	int bit;
	338
	339	gpio->flags &= ~PINMUX_FLAG_TYPE;
	340
	341	if (sh_pfc_get_data_reg(pfc, offset, &dummy, &bit) == 0)
	342	gpio->flags \|= PINMUX_TYPE_GPIO;
	343	else {
	344	gpio->flags \|= PINMUX_TYPE_FUNCTION;
	345
	346	spin_lock_irqsave(&pmx->lock, flags);
	347	pmx->nr_functions++;
	348	spin_unlock_irqrestore(&pmx->lock, flags);
	349	}
	350	}
	351
ca5481c6	352	/* pinmux ranges -> pinctrl pin descs */
0fe763c5	353	static int sh_pfc_map_gpios(struct sh_pfc pfc, struct sh_pfc_pinctrl pmx)
ca5481c6	354	{
d93a891f	355	unsigned long flags;
ca5481c6 PM	356	int i;
ca5481c6 PM	357
d4e62d00	358	pmx->nr_pads = pfc->pdata->last_gpio - pfc->pdata->first_gpio + 1;
ca5481c6 PM	359
	360	pmx->pads = kmalloc(sizeof(struct pinctrl_pin_desc) * pmx->nr_pads,
	361	GFP_KERNEL);
	362	if (unlikely(!pmx->pads)) {
	363	pmx->nr_pads = 0;
	364	return -ENOMEM;
	365	}
	366
d93a891f PM	367	spin_lock_irqsave(&pfc->lock, flags);
d93a891f PM	368
ca5481c6 PM	369	/*
	370	* We don't necessarily have a 1:1 mapping between pin and linux
	371	* GPIO number, as the latter maps to the associated enum_id.
	372	* Care needs to be taken to translate back to pin space when
	373	* dealing with any pin configurations.
	374	*/
	375	for (i = 0; i < pmx->nr_pads; i++) {
	376	struct pinctrl_pin_desc *pin = pmx->pads + i;
d4e62d00	377	struct pinmux_gpio *gpio = pfc->pdata->gpios + i;
ca5481c6	378
d4e62d00	379	pin->number = pfc->pdata->first_gpio + i;
ca5481c6	380	pin->name = gpio->name;
d93a891f	381
e3e79454 PM	382	/* XXX */
	383	if (unlikely(!gpio->enum_id))
	384	continue;
	385
d93a891f	386	sh_pfc_map_one_gpio(pfc, pmx, gpio, i);
ca5481c6 PM	387	}
ca5481c6 PM	388
d93a891f PM	389	spin_unlock_irqrestore(&pfc->lock, flags);
d93a891f PM	390
ca5481c6 PM	391	sh_pfc_pinctrl_desc.pins = pmx->pads;
	392	sh_pfc_pinctrl_desc.npins = pmx->nr_pads;
	393
	394	return 0;
	395	}
	396
0fe763c5	397	static int sh_pfc_map_functions(struct sh_pfc pfc, struct sh_pfc_pinctrl pmx)
d93a891f PM	398	{
	399	unsigned long flags;
	400	int i, fn;
	401
	402	pmx->functions = kzalloc(pmx->nr_functions * sizeof(void *),
	403	GFP_KERNEL);
	404	if (unlikely(!pmx->functions))
	405	return -ENOMEM;
	406
	407	spin_lock_irqsave(&pmx->lock, flags);
	408
	409	for (i = fn = 0; i < pmx->nr_pads; i++) {
d4e62d00	410	struct pinmux_gpio *gpio = pfc->pdata->gpios + i;
d93a891f PM	411
	412	if ((gpio->flags & PINMUX_FLAG_TYPE) == PINMUX_TYPE_FUNCTION)
	413	pmx->functions[fn++] = gpio;
	414	}
	415
	416	spin_unlock_irqrestore(&pmx->lock, flags);
	417
	418	return 0;
	419	}
	420
c6193eac	421	int sh_pfc_register_pinctrl(struct sh_pfc *pfc)
ca5481c6	422	{
c6193eac	423	struct sh_pfc_pinctrl *pmx;
ca5481c6 PM	424	int ret;
ca5481c6 PM	425
c6193eac LP	426	pmx = kzalloc(sizeof(struct sh_pfc_pinctrl), GFP_KERNEL);
	427	if (unlikely(!pmx))
	428	return -ENOMEM;
	429
	430	spin_lock_init(&pmx->lock);
ca5481c6	431
c6193eac LP	432	pmx->pfc = pfc;
c6193eac LP	433	pfc->pinctrl = pmx;
ca5481c6	434
c6193eac	435	ret = sh_pfc_map_gpios(pfc, pmx);
ca5481c6 PM	436	if (unlikely(ret != 0))
	437	return ret;
	438
c6193eac	439	ret = sh_pfc_map_functions(pfc, pmx);
d93a891f PM	440	if (unlikely(ret != 0))
	441	goto free_pads;
	442
c6193eac LP	443	pmx->pctl = pinctrl_register(&sh_pfc_pinctrl_desc, pfc->dev, pmx);
	444	if (IS_ERR(pmx->pctl)) {
	445	ret = PTR_ERR(pmx->pctl);
d93a891f	446	goto free_functions;
ca5481c6 PM	447	}
ca5481c6 PM	448
d4e62d00 LP	449	sh_pfc_gpio_range.npins = pfc->pdata->last_gpio
	450	- pfc->pdata->first_gpio + 1;
	451	sh_pfc_gpio_range.base = pfc->pdata->first_gpio;
	452	sh_pfc_gpio_range.pin_base = pfc->pdata->first_gpio;
ca5481c6	453
c6193eac	454	pinctrl_add_gpio_range(pmx->pctl, &sh_pfc_gpio_range);
ca5481c6 PM	455
	456	return 0;
	457
d93a891f	458	free_functions:
c6193eac	459	kfree(pmx->functions);
d93a891f	460	free_pads:
c6193eac LP	461	kfree(pmx->pads);
c6193eac LP	462	kfree(pmx);
d93a891f	463
ca5481c6 PM	464	return ret;
	465	}
	466
c6193eac	467	int sh_pfc_unregister_pinctrl(struct sh_pfc *pfc)
ca5481c6	468	{
c6193eac	469	struct sh_pfc_pinctrl *pmx = pfc->pinctrl;
ca5481c6	470
ca5481c6 PM	471	pinctrl_unregister(pmx->pctl);
ca5481c6 PM	472
c6193eac LP	473	kfree(pmx->functions);
	474	kfree(pmx->pads);
	475	kfree(pmx);
ca5481c6	476
c6193eac	477	pfc->pinctrl = NULL;
ca5481c6 PM	478	return 0;
ca5481c6 PM	479	}