From patchwork Wed Nov 21 02:53:33 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 1777581 Return-Path: X-Original-To: patchwork-linux-sh@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id E38883FD8C for ; Wed, 21 Nov 2012 02:53:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754488Ab2KUCx2 (ORCPT ); Tue, 20 Nov 2012 21:53:28 -0500 Received: from perceval.ideasonboard.com ([95.142.166.194]:39405 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754481Ab2KUCx1 (ORCPT ); Tue, 20 Nov 2012 21:53:27 -0500 Received: from avalon.ideasonboard.com (unknown [91.178.91.187]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id EC1F835A87 for ; Wed, 21 Nov 2012 03:53:22 +0100 (CET) From: Laurent Pinchart To: linux-sh@vger.kernel.org Subject: [PATCH 17/42] sh-pfc: Move driver from drivers/sh/ to drivers/pinctrl/ Date: Wed, 21 Nov 2012 03:53:33 +0100 Message-Id: <1353466438-10929-18-git-send-email-laurent.pinchart+renesas@ideasonboard.com> X-Mailer: git-send-email 1.7.8.6 In-Reply-To: <1353466438-10929-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com> References: <1353464863-10281-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com> <1353466438-10929-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com> Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org Signed-off-by: Laurent Pinchart --- drivers/pinctrl/Kconfig | 1 + drivers/pinctrl/Makefile | 1 + drivers/pinctrl/sh-pfc/Kconfig | 24 ++ drivers/pinctrl/sh-pfc/Makefile | 5 + drivers/pinctrl/sh-pfc/core.c | 611 ++++++++++++++++++++++++++++++++++++++ drivers/pinctrl/sh-pfc/core.h | 54 ++++ drivers/pinctrl/sh-pfc/gpio.c | 181 +++++++++++ drivers/pinctrl/sh-pfc/pinctrl.c | 481 ++++++++++++++++++++++++++++++ drivers/sh/Kconfig | 1 - drivers/sh/Makefile | 1 - drivers/sh/pfc/Kconfig | 18 -- drivers/sh/pfc/Makefile | 5 - drivers/sh/pfc/core.c | 611 -------------------------------------- drivers/sh/pfc/core.h | 54 ---- drivers/sh/pfc/gpio.c | 181 ----------- drivers/sh/pfc/pinctrl.c | 481 ------------------------------ 16 files changed, 1358 insertions(+), 1352 deletions(-) create mode 100644 drivers/pinctrl/sh-pfc/Kconfig create mode 100644 drivers/pinctrl/sh-pfc/Makefile create mode 100644 drivers/pinctrl/sh-pfc/core.c create mode 100644 drivers/pinctrl/sh-pfc/core.h create mode 100644 drivers/pinctrl/sh-pfc/gpio.c create mode 100644 drivers/pinctrl/sh-pfc/pinctrl.c delete mode 100644 drivers/sh/pfc/Kconfig delete mode 100644 drivers/sh/pfc/Makefile delete mode 100644 drivers/sh/pfc/core.c delete mode 100644 drivers/sh/pfc/core.h delete mode 100644 drivers/sh/pfc/gpio.c delete mode 100644 drivers/sh/pfc/pinctrl.c diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index d96caef..448e62b 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -210,6 +210,7 @@ config PINCTRL_ARMADA_XP bool select PINCTRL_MVEBU +source "drivers/pinctrl/sh-pfc/Kconfig" source "drivers/pinctrl/spear/Kconfig" config PINCTRL_XWAY diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index f395ba5..c44f17d 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -44,4 +44,5 @@ obj-$(CONFIG_PINCTRL_ARMADA_XP) += pinctrl-armada-xp.o obj-$(CONFIG_PINCTRL_XWAY) += pinctrl-xway.o obj-$(CONFIG_PINCTRL_LANTIQ) += pinctrl-lantiq.o +obj-$(CONFIG_PINCTRL_SH_PFC) += sh-pfc/ obj-$(CONFIG_PLAT_SPEAR) += spear/ diff --git a/drivers/pinctrl/sh-pfc/Kconfig b/drivers/pinctrl/sh-pfc/Kconfig new file mode 100644 index 0000000..ae69dbe --- /dev/null +++ b/drivers/pinctrl/sh-pfc/Kconfig @@ -0,0 +1,24 @@ +# +# Renesas SH and SH Mobile PINCTRL drivers +# + +if ARCH_SHMOBILE || SUPERH + +config PINCTRL_SH_PFC + # XXX move off the gpio dependency + depends on GENERIC_GPIO + select GPIO_SH_PFC if ARCH_REQUIRE_GPIOLIB + select PINMUX + select PINCONF + def_bool y + help + This enables pin control drivers for SH and SH Mobile platforms + +config GPIO_SH_PFC + bool "SuperH PFC GPIO support" + depends on PINCTRL_SH_PFC && GPIOLIB + help + This enables support for GPIOs within the SoC's pin function + controller. + +endif diff --git a/drivers/pinctrl/sh-pfc/Makefile b/drivers/pinctrl/sh-pfc/Makefile new file mode 100644 index 0000000..6ba6fb2 --- /dev/null +++ b/drivers/pinctrl/sh-pfc/Makefile @@ -0,0 +1,5 @@ +sh-pfc-objs = core.o pinctrl.o +ifeq ($(CONFIG_GPIO_SH_PFC),y) +sh-pfc-objs += gpio.o +endif +obj-$(CONFIG_PINCTRL_SH_PFC) += sh-pfc.o diff --git a/drivers/pinctrl/sh-pfc/core.c b/drivers/pinctrl/sh-pfc/core.c new file mode 100644 index 0000000..68b40d8 --- /dev/null +++ b/drivers/pinctrl/sh-pfc/core.c @@ -0,0 +1,611 @@ +/* + * 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 DRV_NAME "sh-pfc" +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "core.h" + +static void pfc_iounmap(struct sh_pfc *pfc) +{ + int k; + + for (k = 0; k < pfc->num_windows; k++) + if (pfc->window[k].virt) + iounmap(pfc->window[k].virt); + + kfree(pfc->window); + pfc->num_windows = 0; + pfc->window = NULL; +} + +static int pfc_ioremap(struct sh_pfc *pfc, struct platform_device *pdev) +{ + struct resource *res; + int k; + + if (pdev->num_resources == 0) { + pfc->num_windows = 0; + return 0; + } + + pfc->window = kzalloc(pdev->num_resources * sizeof(*pfc->window), + GFP_NOWAIT); + if (!pfc->window) + goto err1; + + pfc->num_windows = pdev->num_resources; + + for (k = 0, res = pdev->resource; k < pdev->num_resources; k++, res++) { + 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_windows; 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; +} + +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); +} + +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->pdata->unlock_reg) + gpio_write_raw_reg(pfc_phys_to_virt(pfc, pfc->pdata->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->pdata->gpios[gpio]; + struct pinmux_data_reg *data_reg; + int k, n; + + if (!enum_in_range(gpiop->enum_id, &pfc->pdata->data)) + return -1; + + k = 0; + while (1) { + data_reg = pfc->pdata->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->pdata->first_gpio; k <= pfc->pdata->last_gpio; k++) + setup_data_reg(pfc, k); + + k = 0; + while (1) { + drp = pfc->pdata->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->pdata->gpios[gpio]; + int k, n; + + if (!enum_in_range(gpiop->enum_id, &pfc->pdata->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->pdata->data_regs + k; + *bitp = n; + return 0; +} + +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->pdata->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->pdata->gpios[gpio].enum_id; + pinmux_enum_t *data = pfc->pdata->gpio_data; + int k; + + if (!enum_in_range(enum_id, &pfc->pdata->data)) { + if (!enum_in_range(enum_id, &pfc->pdata->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->pdata->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; +} + +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->pdata->output; + break; + + case PINMUX_TYPE_INPUT: + range = &pfc->pdata->input; + break; + + case PINMUX_TYPE_INPUT_PULLUP: + range = &pfc->pdata->input_pu; + break; + + case PINMUX_TYPE_INPUT_PULLDOWN: + range = &pfc->pdata->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->pdata->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; +} + +static int sh_pfc_probe(struct platform_device *pdev) +{ + struct sh_pfc_platform_data *pdata = pdev->dev.platform_data; + struct sh_pfc *pfc; + int ret; + + /* + * Ensure that the type encoding fits + */ + BUILD_BUG_ON(PINMUX_FLAG_TYPE > ((1 << PINMUX_FLAG_DBIT_SHIFT) - 1)); + + if (pdata == NULL) + return -ENODEV; + + pfc = devm_kzalloc(&pdev->dev, sizeof(pfc), GFP_KERNEL); + if (pfc == NULL) + return -ENOMEM; + + pfc->pdata = pdata; + pfc->dev = &pdev->dev; + + ret = pfc_ioremap(pfc, pdev); + if (unlikely(ret < 0)) + return ret; + + spin_lock_init(&pfc->lock); + + pinctrl_provide_dummies(); + setup_data_regs(pfc); + + /* + * Initialize pinctrl bindings first + */ + ret = sh_pfc_register_pinctrl(pfc); + if (unlikely(ret != 0)) + goto err; + +#ifdef CONFIG_GPIO_SH_PFC + /* + * Then the GPIO chip + */ + ret = sh_pfc_register_gpiochip(pfc); + if (unlikely(ret != 0)) { + /* + * If the GPIO chip fails to come up we still leave the + * PFC state as it is, given that there are already + * extant users of it that have succeeded by this point. + */ + pr_notice("failed to init GPIO chip, ignoring...\n"); + } +#endif + + platform_set_drvdata(pdev, pfc); + + pr_info("%s support registered\n", pdata->name); + + return 0; + +err: + pfc_iounmap(pfc); + return ret; +} + +static int __devexit sh_pfc_remove(struct platform_device *pdev) +{ + struct sh_pfc *pfc = platform_get_drvdata(pdev); + +#ifdef CONFIG_GPIO_SH_PFC + sh_pfc_unregister_gpiochip(pfc); +#endif + sh_pfc_unregister_pinctrl(pfc); + + pfc_iounmap(pfc); + + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static const struct platform_device_id sh_pfc_id_table[] = { + { "sh-pfc", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(platform, sh_pfc_id_table); + +static struct platform_driver sh_pfc_driver = { + .probe = sh_pfc_probe, + .remove = __devexit_p(sh_pfc_remove), + .id_table = sh_pfc_id_table, + .driver = { + .name = DRV_NAME, + .owner = THIS_MODULE, + }, +}; + +static int __init sh_pfc_init(void) +{ + return platform_driver_register(&sh_pfc_driver); +} +postcore_initcall(sh_pfc_init); + +static void __exit sh_pfc_exit(void) +{ + platform_driver_unregister(&sh_pfc_driver); +} +module_exit(sh_pfc_exit); + +MODULE_AUTHOR("Magnus Damm, Paul Mundt"); +MODULE_DESCRIPTION("Pin Control and GPIO driver for SuperH pin function controller"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/pinctrl/sh-pfc/core.h b/drivers/pinctrl/sh-pfc/core.h new file mode 100644 index 0000000..b71f559 --- /dev/null +++ b/drivers/pinctrl/sh-pfc/core.h @@ -0,0 +1,54 @@ +/* + * SuperH Pin Function Controller support. + * + * Copyright (C) 2012 Renesas Solutions Corp. + * + * 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. + */ +#ifndef __SH_PFC_CORE_H__ +#define __SH_PFC_CORE_H__ + +#include +#include +#include + +struct pfc_window { + phys_addr_t phys; + void __iomem *virt; + unsigned long size; +}; + +struct sh_pfc_chip; +struct sh_pfc_pinctrl; + +struct sh_pfc { + struct device *dev; + struct sh_pfc_platform_data *pdata; + spinlock_t lock; + + unsigned int num_windows; + struct pfc_window *window; + + struct sh_pfc_chip *gpio; + struct sh_pfc_pinctrl *pinctrl; +}; + +int sh_pfc_register_gpiochip(struct sh_pfc *pfc); +int sh_pfc_unregister_gpiochip(struct sh_pfc *pfc); + +int sh_pfc_register_pinctrl(struct sh_pfc *pfc); +int sh_pfc_unregister_pinctrl(struct sh_pfc *pfc); + +int sh_pfc_read_bit(struct pinmux_data_reg *dr, unsigned long in_pos); +void sh_pfc_write_bit(struct pinmux_data_reg *dr, unsigned long in_pos, + unsigned long value); +int sh_pfc_get_data_reg(struct sh_pfc *pfc, unsigned gpio, + struct pinmux_data_reg **drp, int *bitp); +int sh_pfc_gpio_to_enum(struct sh_pfc *pfc, unsigned gpio, int pos, + pinmux_enum_t *enum_idp); +int sh_pfc_config_gpio(struct sh_pfc *pfc, unsigned gpio, int pinmux_type, + int cfg_mode); + +#endif /* __SH_PFC_CORE_H__ */ diff --git a/drivers/pinctrl/sh-pfc/gpio.c b/drivers/pinctrl/sh-pfc/gpio.c new file mode 100644 index 0000000..9f4f0fd --- /dev/null +++ b/drivers/pinctrl/sh-pfc/gpio.c @@ -0,0 +1,181 @@ +/* + * SuperH Pin Function Controller GPIO driver. + * + * 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 " gpio: " fmt + +#include +#include +#include +#include +#include +#include +#include + +#include "core.h" + +struct sh_pfc_chip { + struct sh_pfc *pfc; + struct gpio_chip gpio_chip; +}; + +static struct sh_pfc_chip *gpio_to_pfc_chip(struct gpio_chip *gc) +{ + return container_of(gc, struct sh_pfc_chip, gpio_chip); +} + +static struct sh_pfc *gpio_to_pfc(struct gpio_chip *gc) +{ + return gpio_to_pfc_chip(gc)->pfc; +} + +static int sh_gpio_request(struct gpio_chip *gc, unsigned offset) +{ + return pinctrl_request_gpio(offset); +} + +static void sh_gpio_free(struct gpio_chip *gc, unsigned offset) +{ + pinctrl_free_gpio(offset); +} + +static void sh_gpio_set_value(struct sh_pfc *pfc, unsigned gpio, int value) +{ + struct pinmux_data_reg *dr = NULL; + int bit = 0; + + if (sh_pfc_get_data_reg(pfc, gpio, &dr, &bit) != 0) + BUG(); + else + sh_pfc_write_bit(dr, bit, value); +} + +static int sh_gpio_get_value(struct sh_pfc *pfc, unsigned gpio) +{ + struct pinmux_data_reg *dr = NULL; + int bit = 0; + + if (sh_pfc_get_data_reg(pfc, gpio, &dr, &bit) != 0) + return -EINVAL; + + return sh_pfc_read_bit(dr, bit); +} + +static int sh_gpio_direction_input(struct gpio_chip *gc, unsigned offset) +{ + return pinctrl_gpio_direction_input(offset); +} + +static int sh_gpio_direction_output(struct gpio_chip *gc, unsigned offset, + int value) +{ + sh_gpio_set_value(gpio_to_pfc(gc), offset, value); + + return pinctrl_gpio_direction_output(offset); +} + +static int sh_gpio_get(struct gpio_chip *gc, unsigned offset) +{ + return sh_gpio_get_value(gpio_to_pfc(gc), offset); +} + +static void sh_gpio_set(struct gpio_chip *gc, unsigned offset, int value) +{ + sh_gpio_set_value(gpio_to_pfc(gc), offset, value); +} + +static int sh_gpio_to_irq(struct gpio_chip *gc, unsigned offset) +{ + struct sh_pfc *pfc = gpio_to_pfc(gc); + pinmux_enum_t enum_id; + pinmux_enum_t *enum_ids; + int i, k, pos; + + pos = 0; + enum_id = 0; + while (1) { + pos = sh_pfc_gpio_to_enum(pfc, offset, pos, &enum_id); + if (pos <= 0 || !enum_id) + break; + + for (i = 0; i < pfc->pdata->gpio_irq_size; i++) { + enum_ids = pfc->pdata->gpio_irq[i].enum_ids; + for (k = 0; enum_ids[k]; k++) { + if (enum_ids[k] == enum_id) + return pfc->pdata->gpio_irq[i].irq; + } + } + } + + return -ENOSYS; +} + +static void sh_pfc_gpio_setup(struct sh_pfc_chip *chip) +{ + struct sh_pfc *pfc = chip->pfc; + struct gpio_chip *gc = &chip->gpio_chip; + + gc->request = sh_gpio_request; + gc->free = sh_gpio_free; + gc->direction_input = sh_gpio_direction_input; + gc->get = sh_gpio_get; + gc->direction_output = sh_gpio_direction_output; + gc->set = sh_gpio_set; + gc->to_irq = sh_gpio_to_irq; + + WARN_ON(pfc->pdata->first_gpio != 0); /* needs testing */ + + gc->label = pfc->pdata->name; + gc->owner = THIS_MODULE; + gc->base = pfc->pdata->first_gpio; + gc->ngpio = (pfc->pdata->last_gpio - pfc->pdata->first_gpio) + 1; +} + +int sh_pfc_register_gpiochip(struct sh_pfc *pfc) +{ + struct sh_pfc_chip *chip; + int ret; + + chip = kzalloc(sizeof(struct sh_pfc_chip), GFP_KERNEL); + if (unlikely(!chip)) + return -ENOMEM; + + chip->pfc = pfc; + + sh_pfc_gpio_setup(chip); + + ret = gpiochip_add(&chip->gpio_chip); + if (unlikely(ret < 0)) { + kfree(chip); + return ret; + } + + pfc->gpio = chip; + + pr_info("%s handling gpio %d -> %d\n", + pfc->pdata->name, pfc->pdata->first_gpio, + pfc->pdata->last_gpio); + + return 0; +} + +int __exit sh_pfc_unregister_gpiochip(struct sh_pfc *pfc) +{ + struct sh_pfc_chip *chip = pfc->gpio; + int ret; + + ret = gpiochip_remove(&chip->gpio_chip); + if (unlikely(ret < 0)) + return ret; + + kfree(chip); + pfc->gpio = NULL; + return 0; +} diff --git a/drivers/pinctrl/sh-pfc/pinctrl.c b/drivers/pinctrl/sh-pfc/pinctrl.c new file mode 100644 index 0000000..c0c8271 --- /dev/null +++ b/drivers/pinctrl/sh-pfc/pinctrl.c @@ -0,0 +1,481 @@ +/* + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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 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 void __devinit 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 __devinit 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 __devinit 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 __devexit 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; +} diff --git a/drivers/sh/Kconfig b/drivers/sh/Kconfig index d860ef7..f168a61 100644 --- a/drivers/sh/Kconfig +++ b/drivers/sh/Kconfig @@ -1,6 +1,5 @@ menu "SuperH / SH-Mobile Driver Options" source "drivers/sh/intc/Kconfig" -source "drivers/sh/pfc/Kconfig" endmenu diff --git a/drivers/sh/Makefile b/drivers/sh/Makefile index e57895b..fc67f56 100644 --- a/drivers/sh/Makefile +++ b/drivers/sh/Makefile @@ -5,7 +5,6 @@ obj-y := intc/ obj-$(CONFIG_HAVE_CLK) += clk/ obj-$(CONFIG_MAPLE) += maple/ -obj-$(CONFIG_SH_PFC) += pfc/ obj-$(CONFIG_SUPERHYWAY) += superhyway/ obj-y += pm_runtime.o diff --git a/drivers/sh/pfc/Kconfig b/drivers/sh/pfc/Kconfig deleted file mode 100644 index eaeabc5..0000000 --- a/drivers/sh/pfc/Kconfig +++ /dev/null @@ -1,18 +0,0 @@ -comment "Pin function controller options" - -config SH_PFC - # XXX move off the gpio dependency - depends on GENERIC_GPIO - select GPIO_SH_PFC if ARCH_REQUIRE_GPIOLIB - select PINCTRL_SH_PFC - select PINCTRL - select PINMUX - select PINCONF - def_bool y - -config GPIO_SH_PFC - bool "SuperH PFC GPIO support" - depends on SH_PFC && GPIOLIB - help - This enables support for GPIOs within the SoC's pin function - controller. diff --git a/drivers/sh/pfc/Makefile b/drivers/sh/pfc/Makefile deleted file mode 100644 index 6315cf3..0000000 --- a/drivers/sh/pfc/Makefile +++ /dev/null @@ -1,5 +0,0 @@ -sh-pfc-objs = core.o pinctrl.o -ifeq ($(CONFIG_GPIO_SH_PFC),y) -sh-pfc-objs += gpio.o -endif -obj-y += sh-pfc.o diff --git a/drivers/sh/pfc/core.c b/drivers/sh/pfc/core.c deleted file mode 100644 index 68b40d8..0000000 --- a/drivers/sh/pfc/core.c +++ /dev/null @@ -1,611 +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 DRV_NAME "sh-pfc" -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "core.h" - -static void pfc_iounmap(struct sh_pfc *pfc) -{ - int k; - - for (k = 0; k < pfc->num_windows; k++) - if (pfc->window[k].virt) - iounmap(pfc->window[k].virt); - - kfree(pfc->window); - pfc->num_windows = 0; - pfc->window = NULL; -} - -static int pfc_ioremap(struct sh_pfc *pfc, struct platform_device *pdev) -{ - struct resource *res; - int k; - - if (pdev->num_resources == 0) { - pfc->num_windows = 0; - return 0; - } - - pfc->window = kzalloc(pdev->num_resources * sizeof(*pfc->window), - GFP_NOWAIT); - if (!pfc->window) - goto err1; - - pfc->num_windows = pdev->num_resources; - - for (k = 0, res = pdev->resource; k < pdev->num_resources; k++, res++) { - 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_windows; 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; -} - -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); -} - -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->pdata->unlock_reg) - gpio_write_raw_reg(pfc_phys_to_virt(pfc, pfc->pdata->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->pdata->gpios[gpio]; - struct pinmux_data_reg *data_reg; - int k, n; - - if (!enum_in_range(gpiop->enum_id, &pfc->pdata->data)) - return -1; - - k = 0; - while (1) { - data_reg = pfc->pdata->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->pdata->first_gpio; k <= pfc->pdata->last_gpio; k++) - setup_data_reg(pfc, k); - - k = 0; - while (1) { - drp = pfc->pdata->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->pdata->gpios[gpio]; - int k, n; - - if (!enum_in_range(gpiop->enum_id, &pfc->pdata->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->pdata->data_regs + k; - *bitp = n; - return 0; -} - -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->pdata->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->pdata->gpios[gpio].enum_id; - pinmux_enum_t *data = pfc->pdata->gpio_data; - int k; - - if (!enum_in_range(enum_id, &pfc->pdata->data)) { - if (!enum_in_range(enum_id, &pfc->pdata->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->pdata->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; -} - -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->pdata->output; - break; - - case PINMUX_TYPE_INPUT: - range = &pfc->pdata->input; - break; - - case PINMUX_TYPE_INPUT_PULLUP: - range = &pfc->pdata->input_pu; - break; - - case PINMUX_TYPE_INPUT_PULLDOWN: - range = &pfc->pdata->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->pdata->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; -} - -static int sh_pfc_probe(struct platform_device *pdev) -{ - struct sh_pfc_platform_data *pdata = pdev->dev.platform_data; - struct sh_pfc *pfc; - int ret; - - /* - * Ensure that the type encoding fits - */ - BUILD_BUG_ON(PINMUX_FLAG_TYPE > ((1 << PINMUX_FLAG_DBIT_SHIFT) - 1)); - - if (pdata == NULL) - return -ENODEV; - - pfc = devm_kzalloc(&pdev->dev, sizeof(pfc), GFP_KERNEL); - if (pfc == NULL) - return -ENOMEM; - - pfc->pdata = pdata; - pfc->dev = &pdev->dev; - - ret = pfc_ioremap(pfc, pdev); - if (unlikely(ret < 0)) - return ret; - - spin_lock_init(&pfc->lock); - - pinctrl_provide_dummies(); - setup_data_regs(pfc); - - /* - * Initialize pinctrl bindings first - */ - ret = sh_pfc_register_pinctrl(pfc); - if (unlikely(ret != 0)) - goto err; - -#ifdef CONFIG_GPIO_SH_PFC - /* - * Then the GPIO chip - */ - ret = sh_pfc_register_gpiochip(pfc); - if (unlikely(ret != 0)) { - /* - * If the GPIO chip fails to come up we still leave the - * PFC state as it is, given that there are already - * extant users of it that have succeeded by this point. - */ - pr_notice("failed to init GPIO chip, ignoring...\n"); - } -#endif - - platform_set_drvdata(pdev, pfc); - - pr_info("%s support registered\n", pdata->name); - - return 0; - -err: - pfc_iounmap(pfc); - return ret; -} - -static int __devexit sh_pfc_remove(struct platform_device *pdev) -{ - struct sh_pfc *pfc = platform_get_drvdata(pdev); - -#ifdef CONFIG_GPIO_SH_PFC - sh_pfc_unregister_gpiochip(pfc); -#endif - sh_pfc_unregister_pinctrl(pfc); - - pfc_iounmap(pfc); - - platform_set_drvdata(pdev, NULL); - - return 0; -} - -static const struct platform_device_id sh_pfc_id_table[] = { - { "sh-pfc", 0 }, - { }, -}; -MODULE_DEVICE_TABLE(platform, sh_pfc_id_table); - -static struct platform_driver sh_pfc_driver = { - .probe = sh_pfc_probe, - .remove = __devexit_p(sh_pfc_remove), - .id_table = sh_pfc_id_table, - .driver = { - .name = DRV_NAME, - .owner = THIS_MODULE, - }, -}; - -static int __init sh_pfc_init(void) -{ - return platform_driver_register(&sh_pfc_driver); -} -postcore_initcall(sh_pfc_init); - -static void __exit sh_pfc_exit(void) -{ - platform_driver_unregister(&sh_pfc_driver); -} -module_exit(sh_pfc_exit); - -MODULE_AUTHOR("Magnus Damm, Paul Mundt"); -MODULE_DESCRIPTION("Pin Control and GPIO driver for SuperH pin function controller"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/sh/pfc/core.h b/drivers/sh/pfc/core.h deleted file mode 100644 index b71f559..0000000 --- a/drivers/sh/pfc/core.h +++ /dev/null @@ -1,54 +0,0 @@ -/* - * SuperH Pin Function Controller support. - * - * Copyright (C) 2012 Renesas Solutions Corp. - * - * 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. - */ -#ifndef __SH_PFC_CORE_H__ -#define __SH_PFC_CORE_H__ - -#include -#include -#include - -struct pfc_window { - phys_addr_t phys; - void __iomem *virt; - unsigned long size; -}; - -struct sh_pfc_chip; -struct sh_pfc_pinctrl; - -struct sh_pfc { - struct device *dev; - struct sh_pfc_platform_data *pdata; - spinlock_t lock; - - unsigned int num_windows; - struct pfc_window *window; - - struct sh_pfc_chip *gpio; - struct sh_pfc_pinctrl *pinctrl; -}; - -int sh_pfc_register_gpiochip(struct sh_pfc *pfc); -int sh_pfc_unregister_gpiochip(struct sh_pfc *pfc); - -int sh_pfc_register_pinctrl(struct sh_pfc *pfc); -int sh_pfc_unregister_pinctrl(struct sh_pfc *pfc); - -int sh_pfc_read_bit(struct pinmux_data_reg *dr, unsigned long in_pos); -void sh_pfc_write_bit(struct pinmux_data_reg *dr, unsigned long in_pos, - unsigned long value); -int sh_pfc_get_data_reg(struct sh_pfc *pfc, unsigned gpio, - struct pinmux_data_reg **drp, int *bitp); -int sh_pfc_gpio_to_enum(struct sh_pfc *pfc, unsigned gpio, int pos, - pinmux_enum_t *enum_idp); -int sh_pfc_config_gpio(struct sh_pfc *pfc, unsigned gpio, int pinmux_type, - int cfg_mode); - -#endif /* __SH_PFC_CORE_H__ */ diff --git a/drivers/sh/pfc/gpio.c b/drivers/sh/pfc/gpio.c deleted file mode 100644 index 9f4f0fd..0000000 --- a/drivers/sh/pfc/gpio.c +++ /dev/null @@ -1,181 +0,0 @@ -/* - * SuperH Pin Function Controller GPIO driver. - * - * 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 " gpio: " fmt - -#include -#include -#include -#include -#include -#include -#include - -#include "core.h" - -struct sh_pfc_chip { - struct sh_pfc *pfc; - struct gpio_chip gpio_chip; -}; - -static struct sh_pfc_chip *gpio_to_pfc_chip(struct gpio_chip *gc) -{ - return container_of(gc, struct sh_pfc_chip, gpio_chip); -} - -static struct sh_pfc *gpio_to_pfc(struct gpio_chip *gc) -{ - return gpio_to_pfc_chip(gc)->pfc; -} - -static int sh_gpio_request(struct gpio_chip *gc, unsigned offset) -{ - return pinctrl_request_gpio(offset); -} - -static void sh_gpio_free(struct gpio_chip *gc, unsigned offset) -{ - pinctrl_free_gpio(offset); -} - -static void sh_gpio_set_value(struct sh_pfc *pfc, unsigned gpio, int value) -{ - struct pinmux_data_reg *dr = NULL; - int bit = 0; - - if (sh_pfc_get_data_reg(pfc, gpio, &dr, &bit) != 0) - BUG(); - else - sh_pfc_write_bit(dr, bit, value); -} - -static int sh_gpio_get_value(struct sh_pfc *pfc, unsigned gpio) -{ - struct pinmux_data_reg *dr = NULL; - int bit = 0; - - if (sh_pfc_get_data_reg(pfc, gpio, &dr, &bit) != 0) - return -EINVAL; - - return sh_pfc_read_bit(dr, bit); -} - -static int sh_gpio_direction_input(struct gpio_chip *gc, unsigned offset) -{ - return pinctrl_gpio_direction_input(offset); -} - -static int sh_gpio_direction_output(struct gpio_chip *gc, unsigned offset, - int value) -{ - sh_gpio_set_value(gpio_to_pfc(gc), offset, value); - - return pinctrl_gpio_direction_output(offset); -} - -static int sh_gpio_get(struct gpio_chip *gc, unsigned offset) -{ - return sh_gpio_get_value(gpio_to_pfc(gc), offset); -} - -static void sh_gpio_set(struct gpio_chip *gc, unsigned offset, int value) -{ - sh_gpio_set_value(gpio_to_pfc(gc), offset, value); -} - -static int sh_gpio_to_irq(struct gpio_chip *gc, unsigned offset) -{ - struct sh_pfc *pfc = gpio_to_pfc(gc); - pinmux_enum_t enum_id; - pinmux_enum_t *enum_ids; - int i, k, pos; - - pos = 0; - enum_id = 0; - while (1) { - pos = sh_pfc_gpio_to_enum(pfc, offset, pos, &enum_id); - if (pos <= 0 || !enum_id) - break; - - for (i = 0; i < pfc->pdata->gpio_irq_size; i++) { - enum_ids = pfc->pdata->gpio_irq[i].enum_ids; - for (k = 0; enum_ids[k]; k++) { - if (enum_ids[k] == enum_id) - return pfc->pdata->gpio_irq[i].irq; - } - } - } - - return -ENOSYS; -} - -static void sh_pfc_gpio_setup(struct sh_pfc_chip *chip) -{ - struct sh_pfc *pfc = chip->pfc; - struct gpio_chip *gc = &chip->gpio_chip; - - gc->request = sh_gpio_request; - gc->free = sh_gpio_free; - gc->direction_input = sh_gpio_direction_input; - gc->get = sh_gpio_get; - gc->direction_output = sh_gpio_direction_output; - gc->set = sh_gpio_set; - gc->to_irq = sh_gpio_to_irq; - - WARN_ON(pfc->pdata->first_gpio != 0); /* needs testing */ - - gc->label = pfc->pdata->name; - gc->owner = THIS_MODULE; - gc->base = pfc->pdata->first_gpio; - gc->ngpio = (pfc->pdata->last_gpio - pfc->pdata->first_gpio) + 1; -} - -int sh_pfc_register_gpiochip(struct sh_pfc *pfc) -{ - struct sh_pfc_chip *chip; - int ret; - - chip = kzalloc(sizeof(struct sh_pfc_chip), GFP_KERNEL); - if (unlikely(!chip)) - return -ENOMEM; - - chip->pfc = pfc; - - sh_pfc_gpio_setup(chip); - - ret = gpiochip_add(&chip->gpio_chip); - if (unlikely(ret < 0)) { - kfree(chip); - return ret; - } - - pfc->gpio = chip; - - pr_info("%s handling gpio %d -> %d\n", - pfc->pdata->name, pfc->pdata->first_gpio, - pfc->pdata->last_gpio); - - return 0; -} - -int __exit sh_pfc_unregister_gpiochip(struct sh_pfc *pfc) -{ - struct sh_pfc_chip *chip = pfc->gpio; - int ret; - - ret = gpiochip_remove(&chip->gpio_chip); - if (unlikely(ret < 0)) - return ret; - - kfree(chip); - pfc->gpio = NULL; - return 0; -} diff --git a/drivers/sh/pfc/pinctrl.c b/drivers/sh/pfc/pinctrl.c deleted file mode 100644 index c0c8271..0000000 --- a/drivers/sh/pfc/pinctrl.c +++ /dev/null @@ -1,481 +0,0 @@ -/* - * 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#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 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 void __devinit 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 __devinit 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 __devinit 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 __devexit 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; -}