sh: pfc: Shuffle PFC support core.

This follows the intc/clk changes and shuffles the PFC support code under
its own directory. This will facilitate better code sharing, and allow us
to trim down the exported interface by quite a margin.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 0 insertions, 578 deletions

diff --git a/drivers/sh/pfc.c b/drivers/sh/pfc.c
deleted file mode 100644
index ce4579ebd60..00000000000
--- a/drivers/sh/pfc.c
+++ /dev/null
@@ -1,578 +0,0 @@
-/*
- * SuperH Pin Function Controller support.
- *
- * Copyright (C) 2008 Magnus Damm
- * Copyright (C) 2009 - 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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/sh_pfc.h>
-#include <linux/module.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/bitops.h>
-#include <linux/slab.h>
-#include <linux/ioport.h>
-
-static struct sh_pfc *sh_pfc __read_mostly;
-
-static inline bool sh_pfc_initialized(void)
-{
-	return !!sh_pfc;
-}
-
-static void pfc_iounmap(struct sh_pfc *pfc)
-{
-	int k;
-
-	for (k = 0; k < pfc->num_resources; k++)
-		if (pfc->window[k].virt)
-			iounmap(pfc->window[k].virt);
-
-	kfree(pfc->window);
-	pfc->window = NULL;
-}
-
-static int pfc_ioremap(struct sh_pfc *pfc)
-{
-	struct resource *res;
-	int k;
-
-	if (!pfc->num_resources)
-		return 0;
-
-	pfc->window = kzalloc(pfc->num_resources * sizeof(*pfc->window),
-			      GFP_NOWAIT);
-	if (!pfc->window)
-		goto err1;
-
-	for (k = 0; k < pfc->num_resources; k++) {
-		res = pfc->resource + k;
-		WARN_ON(resource_type(res) != IORESOURCE_MEM);
-		pfc->window[k].phys = res->start;
-		pfc->window[k].size = resource_size(res);
-		pfc->window[k].virt = ioremap_nocache(res->start,
-							 resource_size(res));
-		if (!pfc->window[k].virt)
-			goto err2;
-	}
-
-	return 0;
-
-err2:
-	pfc_iounmap(pfc);
-err1:
-	return -1;
-}
-
-static void __iomem *pfc_phys_to_virt(struct sh_pfc *pfc,
-				      unsigned long address)
-{
-	struct pfc_window *window;
-	int k;
-
-	/* scan through physical windows and convert address */
-	for (k = 0; k < pfc->num_resources; k++) {
-		window = pfc->window + k;
-
-		if (address < window->phys)
-			continue;
-
-		if (address >= (window->phys + window->size))
-			continue;
-
-		return window->virt + (address - window->phys);
-	}
-
-	/* no windows defined, register must be 1:1 mapped virt:phys */
-	return (void __iomem *)address;
-}
-
-static int enum_in_range(pinmux_enum_t enum_id, struct pinmux_range *r)
-{
-	if (enum_id < r->begin)
-		return 0;
-
-	if (enum_id > r->end)
-		return 0;
-
-	return 1;
-}
-
-static unsigned long gpio_read_raw_reg(void __iomem *mapped_reg,
-				       unsigned long reg_width)
-{
-	switch (reg_width) {
-	case 8:
-		return ioread8(mapped_reg);
-	case 16:
-		return ioread16(mapped_reg);
-	case 32:
-		return ioread32(mapped_reg);
-	}
-
-	BUG();
-	return 0;
-}
-
-static void gpio_write_raw_reg(void __iomem *mapped_reg,
-			       unsigned long reg_width,
-			       unsigned long data)
-{
-	switch (reg_width) {
-	case 8:
-		iowrite8(data, mapped_reg);
-		return;
-	case 16:
-		iowrite16(data, mapped_reg);
-		return;
-	case 32:
-		iowrite32(data, mapped_reg);
-		return;
-	}
-
-	BUG();
-}
-
-int sh_pfc_read_bit(struct pinmux_data_reg *dr, unsigned long in_pos)
-{
-	unsigned long pos;
-
-	pos = dr->reg_width - (in_pos + 1);
-
-	pr_debug("read_bit: addr = %lx, pos = %ld, "
-		 "r_width = %ld\n", dr->reg, pos, dr->reg_width);
-
-	return (gpio_read_raw_reg(dr->mapped_reg, dr->reg_width) >> pos) & 1;
-}
-EXPORT_SYMBOL_GPL(sh_pfc_read_bit);
-
-void sh_pfc_write_bit(struct pinmux_data_reg *dr, unsigned long in_pos,
-		      unsigned long value)
-{
-	unsigned long pos;
-
-	pos = dr->reg_width - (in_pos + 1);
-
-	pr_debug("write_bit addr = %lx, value = %d, pos = %ld, "
-		 "r_width = %ld\n",
-		 dr->reg, !!value, pos, dr->reg_width);
-
-	if (value)
-		set_bit(pos, &dr->reg_shadow);
-	else
-		clear_bit(pos, &dr->reg_shadow);
-
-	gpio_write_raw_reg(dr->mapped_reg, dr->reg_width, dr->reg_shadow);
-}
-EXPORT_SYMBOL_GPL(sh_pfc_write_bit);
-
-static void config_reg_helper(struct sh_pfc *pfc,
-			      struct pinmux_cfg_reg *crp,
-			      unsigned long in_pos,
-			      void __iomem **mapped_regp,
-			      unsigned long *maskp,
-			      unsigned long *posp)
-{
-	int k;
-
-	*mapped_regp = pfc_phys_to_virt(pfc, crp->reg);
-
-	if (crp->field_width) {
-		*maskp = (1 << crp->field_width) - 1;
-		*posp = crp->reg_width - ((in_pos + 1) * crp->field_width);
-	} else {
-		*maskp = (1 << crp->var_field_width[in_pos]) - 1;
-		*posp = crp->reg_width;
-		for (k = 0; k <= in_pos; k++)
-			*posp -= crp->var_field_width[k];
-	}
-}
-
-static int read_config_reg(struct sh_pfc *pfc,
-			   struct pinmux_cfg_reg *crp,
-			   unsigned long field)
-{
-	void __iomem *mapped_reg;
-	unsigned long mask, pos;
-
-	config_reg_helper(pfc, crp, field, &mapped_reg, &mask, &pos);
-
-	pr_debug("read_reg: addr = %lx, field = %ld, "
-		 "r_width = %ld, f_width = %ld\n",
-		 crp->reg, field, crp->reg_width, crp->field_width);
-
-	return (gpio_read_raw_reg(mapped_reg, crp->reg_width) >> pos) & mask;
-}
-
-static void write_config_reg(struct sh_pfc *pfc,
-			     struct pinmux_cfg_reg *crp,
-			     unsigned long field, unsigned long value)
-{
-	void __iomem *mapped_reg;
-	unsigned long mask, pos, data;
-
-	config_reg_helper(pfc, crp, field, &mapped_reg, &mask, &pos);
-
-	pr_debug("write_reg addr = %lx, value = %ld, field = %ld, "
-		 "r_width = %ld, f_width = %ld\n",
-		 crp->reg, value, field, crp->reg_width, crp->field_width);
-
-	mask = ~(mask << pos);
-	value = value << pos;
-
-	data = gpio_read_raw_reg(mapped_reg, crp->reg_width);
-	data &= mask;
-	data |= value;
-
-	if (pfc->unlock_reg)
-		gpio_write_raw_reg(pfc_phys_to_virt(pfc, pfc->unlock_reg),
-				   32, ~data);
-
-	gpio_write_raw_reg(mapped_reg, crp->reg_width, data);
-}
-
-static int setup_data_reg(struct sh_pfc *pfc, unsigned gpio)
-{
-	struct pinmux_gpio *gpiop = &pfc->gpios[gpio];
-	struct pinmux_data_reg *data_reg;
-	int k, n;
-
-	if (!enum_in_range(gpiop->enum_id, &pfc->data))
-		return -1;
-
-	k = 0;
-	while (1) {
-		data_reg = pfc->data_regs + k;
-
-		if (!data_reg->reg_width)
-			break;
-
-		data_reg->mapped_reg = pfc_phys_to_virt(pfc, data_reg->reg);
-
-		for (n = 0; n < data_reg->reg_width; n++) {
-			if (data_reg->enum_ids[n] == gpiop->enum_id) {
-				gpiop->flags &= ~PINMUX_FLAG_DREG;
-				gpiop->flags |= (k << PINMUX_FLAG_DREG_SHIFT);
-				gpiop->flags &= ~PINMUX_FLAG_DBIT;
-				gpiop->flags |= (n << PINMUX_FLAG_DBIT_SHIFT);
-				return 0;
-			}
-		}
-		k++;
-	}
-
-	BUG();
-
-	return -1;
-}
-
-static void setup_data_regs(struct sh_pfc *pfc)
-{
-	struct pinmux_data_reg *drp;
-	int k;
-
-	for (k = pfc->first_gpio; k <= pfc->last_gpio; k++)
-		setup_data_reg(pfc, k);
-
-	k = 0;
-	while (1) {
-		drp = pfc->data_regs + k;
-
-		if (!drp->reg_width)
-			break;
-
-		drp->reg_shadow = gpio_read_raw_reg(drp->mapped_reg,
-						    drp->reg_width);
-		k++;
-	}
-}
-
-int sh_pfc_get_data_reg(struct sh_pfc *pfc, unsigned gpio,
-			struct pinmux_data_reg **drp, int *bitp)
-{
-	struct pinmux_gpio *gpiop = &pfc->gpios[gpio];
-	int k, n;
-
-	if (!enum_in_range(gpiop->enum_id, &pfc->data))
-		return -1;
-
-	k = (gpiop->flags & PINMUX_FLAG_DREG) >> PINMUX_FLAG_DREG_SHIFT;
-	n = (gpiop->flags & PINMUX_FLAG_DBIT) >> PINMUX_FLAG_DBIT_SHIFT;
-	*drp = pfc->data_regs + k;
-	*bitp = n;
-	return 0;
-}
-EXPORT_SYMBOL_GPL(sh_pfc_get_data_reg);
-
-static int get_config_reg(struct sh_pfc *pfc, pinmux_enum_t enum_id,
-			  struct pinmux_cfg_reg **crp,
-			  int *fieldp, int *valuep,
-			  unsigned long **cntp)
-{
-	struct pinmux_cfg_reg *config_reg;
-	unsigned long r_width, f_width, curr_width, ncomb;
-	int k, m, n, pos, bit_pos;
-
-	k = 0;
-	while (1) {
-		config_reg = pfc->cfg_regs + k;
-
-		r_width = config_reg->reg_width;
-		f_width = config_reg->field_width;
-
-		if (!r_width)
-			break;
-
-		pos = 0;
-		m = 0;
-		for (bit_pos = 0; bit_pos < r_width; bit_pos += curr_width) {
-			if (f_width)
-				curr_width = f_width;
-			else
-				curr_width = config_reg->var_field_width[m];
-
-			ncomb = 1 << curr_width;
-			for (n = 0; n < ncomb; n++) {
-				if (config_reg->enum_ids[pos + n] == enum_id) {
-					*crp = config_reg;
-					*fieldp = m;
-					*valuep = n;
-					*cntp = &config_reg->cnt[m];
-					return 0;
-				}
-			}
-			pos += ncomb;
-			m++;
-		}
-		k++;
-	}
-
-	return -1;
-}
-
-int sh_pfc_gpio_to_enum(struct sh_pfc *pfc, unsigned gpio, int pos,
-			pinmux_enum_t *enum_idp)
-{
-	pinmux_enum_t enum_id = pfc->gpios[gpio].enum_id;
-	pinmux_enum_t *data = pfc->gpio_data;
-	int k;
-
-	if (!enum_in_range(enum_id, &pfc->data)) {
-		if (!enum_in_range(enum_id, &pfc->mark)) {
-			pr_err("non data/mark enum_id for gpio %d\n", gpio);
-			return -1;
-		}
-	}
-
-	if (pos) {
-		*enum_idp = data[pos + 1];
-		return pos + 1;
-	}
-
-	for (k = 0; k < pfc->gpio_data_size; k++) {
-		if (data[k] == enum_id) {
-			*enum_idp = data[k + 1];
-			return k + 1;
-		}
-	}
-
-	pr_err("cannot locate data/mark enum_id for gpio %d\n", gpio);
-	return -1;
-}
-EXPORT_SYMBOL_GPL(sh_pfc_gpio_to_enum);
-
-int sh_pfc_config_gpio(struct sh_pfc *pfc, unsigned gpio, int pinmux_type,
-		       int cfg_mode)
-{
-	struct pinmux_cfg_reg *cr = NULL;
-	pinmux_enum_t enum_id;
-	struct pinmux_range *range;
-	int in_range, pos, field, value;
-	unsigned long *cntp;
-
-	switch (pinmux_type) {
-
-	case PINMUX_TYPE_FUNCTION:
-		range = NULL;
-		break;
-
-	case PINMUX_TYPE_OUTPUT:
-		range = &pfc->output;
-		break;
-
-	case PINMUX_TYPE_INPUT:
-		range = &pfc->input;
-		break;
-
-	case PINMUX_TYPE_INPUT_PULLUP:
-		range = &pfc->input_pu;
-		break;
-
-	case PINMUX_TYPE_INPUT_PULLDOWN:
-		range = &pfc->input_pd;
-		break;
-
-	default:
-		goto out_err;
-	}
-
-	pos = 0;
-	enum_id = 0;
-	field = 0;
-	value = 0;
-	while (1) {
-		pos = sh_pfc_gpio_to_enum(pfc, gpio, pos, &enum_id);
-		if (pos <= 0)
-			goto out_err;
-
-		if (!enum_id)
-			break;
-
-		/* first check if this is a function enum */
-		in_range = enum_in_range(enum_id, &pfc->function);
-		if (!in_range) {
-			/* not a function enum */
-			if (range) {
-				/*
-				 * other range exists, so this pin is
-				 * a regular GPIO pin that now is being
-				 * bound to a specific direction.
-				 *
-				 * for this case we only allow function enums
-				 * and the enums that match the other range.
-				 */
-				in_range = enum_in_range(enum_id, range);
-
-				/*
-				 * special case pass through for fixed
-				 * input-only or output-only pins without
-				 * function enum register association.
-				 */
-				if (in_range && enum_id == range->force)
-					continue;
-			} else {
-				/*
-				 * no other range exists, so this pin
-				 * must then be of the function type.
-				 *
-				 * allow function type pins to select
-				 * any combination of function/in/out
-				 * in their MARK lists.
-				 */
-				in_range = 1;
-			}
-		}
-
-		if (!in_range)
-			continue;
-
-		if (get_config_reg(pfc, enum_id, &cr,
-				   &field, &value, &cntp) != 0)
-			goto out_err;
-
-		switch (cfg_mode) {
-		case GPIO_CFG_DRYRUN:
-			if (!*cntp ||
-			    (read_config_reg(pfc, cr, field) != value))
-				continue;
-			break;
-
-		case GPIO_CFG_REQ:
-			write_config_reg(pfc, cr, field, value);
-			*cntp = *cntp + 1;
-			break;
-
-		case GPIO_CFG_FREE:
-			*cntp = *cntp - 1;
-			break;
-		}
-	}
-
-	return 0;
- out_err:
-	return -1;
-}
-EXPORT_SYMBOL_GPL(sh_pfc_config_gpio);
-
-int sh_pfc_set_direction(struct sh_pfc *pfc, unsigned gpio,
-			 int new_pinmux_type)
-{
-	int pinmux_type;
-	int ret = -EINVAL;
-
-	if (!pfc)
-		goto err_out;
-
-	pinmux_type = pfc->gpios[gpio].flags & PINMUX_FLAG_TYPE;
-
-	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, gpio, pinmux_type, GPIO_CFG_FREE);
-		break;
-	default:
-		goto err_out;
-	}
-
-	if (sh_pfc_config_gpio(pfc, gpio,
-			       new_pinmux_type,
-			       GPIO_CFG_DRYRUN) != 0)
-		goto err_out;
-
-	if (sh_pfc_config_gpio(pfc, gpio,
-			       new_pinmux_type,
-			       GPIO_CFG_REQ) != 0)
-		BUG();
-
-	pfc->gpios[gpio].flags &= ~PINMUX_FLAG_TYPE;
-	pfc->gpios[gpio].flags |= new_pinmux_type;
-
-	ret = 0;
- err_out:
-	return ret;
-}
-EXPORT_SYMBOL_GPL(sh_pfc_set_direction);
-
-int register_sh_pfc(struct sh_pfc *pfc)
-{
-	int (*initroutine)(struct sh_pfc *) = NULL;
-	int ret;
-
-	/*
-	 * Ensure that the type encoding fits
-	 */
-	BUILD_BUG_ON(PINMUX_FLAG_TYPE > ((1 << PINMUX_FLAG_DBIT_SHIFT) - 1));
-
-	if (sh_pfc)
-		return -EBUSY;
-
-	ret = pfc_ioremap(pfc);
-	if (unlikely(ret < 0))
-		return ret;
-
-	spin_lock_init(&pfc->lock);
-
-	setup_data_regs(pfc);
-
-	sh_pfc = pfc;
-	pr_info("%s support registered\n", pfc->name);
-
-	initroutine = symbol_request(sh_pfc_register_gpiochip);
-	if (initroutine) {
-		(*initroutine)(pfc);
-		symbol_put_addr(initroutine);
-	}
-
-	return 0;
-}