From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/pinctrl/sh-pfc/core.c | 662 +++++++++++++++++++++++++++++++++++ 1 file changed, 662 insertions(+) create mode 100644 kernel/drivers/pinctrl/sh-pfc/core.c (limited to 'kernel/drivers/pinctrl/sh-pfc/core.c') diff --git a/kernel/drivers/pinctrl/sh-pfc/core.c b/kernel/drivers/pinctrl/sh-pfc/core.c new file mode 100644 index 000000000..7b2c9495c --- /dev/null +++ b/kernel/drivers/pinctrl/sh-pfc/core.c @@ -0,0 +1,662 @@ +/* + * 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" + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "core.h" + +static int sh_pfc_map_resources(struct sh_pfc *pfc, + struct platform_device *pdev) +{ + unsigned int num_windows = 0; + unsigned int num_irqs = 0; + struct sh_pfc_window *windows; + unsigned int *irqs = NULL; + struct resource *res; + unsigned int i; + + /* Count the MEM and IRQ resources. */ + for (i = 0; i < pdev->num_resources; ++i) { + switch (resource_type(&pdev->resource[i])) { + case IORESOURCE_MEM: + num_windows++; + break; + + case IORESOURCE_IRQ: + num_irqs++; + break; + } + } + + if (num_windows == 0) + return -EINVAL; + + /* Allocate memory windows and IRQs arrays. */ + windows = devm_kzalloc(pfc->dev, num_windows * sizeof(*windows), + GFP_KERNEL); + if (windows == NULL) + return -ENOMEM; + + pfc->num_windows = num_windows; + pfc->windows = windows; + + if (num_irqs) { + irqs = devm_kzalloc(pfc->dev, num_irqs * sizeof(*irqs), + GFP_KERNEL); + if (irqs == NULL) + return -ENOMEM; + + pfc->num_irqs = num_irqs; + pfc->irqs = irqs; + } + + /* Fill them. */ + for (i = 0, res = pdev->resource; i < pdev->num_resources; i++, res++) { + switch (resource_type(res)) { + case IORESOURCE_MEM: + windows->phys = res->start; + windows->size = resource_size(res); + windows->virt = devm_ioremap_resource(pfc->dev, res); + if (IS_ERR(windows->virt)) + return -ENOMEM; + windows++; + break; + + case IORESOURCE_IRQ: + *irqs++ = res->start; + break; + } + } + + return 0; +} + +static void __iomem *sh_pfc_phys_to_virt(struct sh_pfc *pfc, u32 reg) +{ + struct sh_pfc_window *window; + phys_addr_t address = reg; + unsigned int i; + + /* scan through physical windows and convert address */ + for (i = 0; i < pfc->num_windows; i++) { + window = pfc->windows + i; + + if (address < window->phys) + continue; + + if (address >= (window->phys + window->size)) + continue; + + return window->virt + (address - window->phys); + } + + BUG(); + return NULL; +} + +int sh_pfc_get_pin_index(struct sh_pfc *pfc, unsigned int pin) +{ + unsigned int offset; + unsigned int i; + + for (i = 0, offset = 0; i < pfc->nr_ranges; ++i) { + const struct sh_pfc_pin_range *range = &pfc->ranges[i]; + + if (pin <= range->end) + return pin >= range->start + ? offset + pin - range->start : -1; + + offset += range->end - range->start + 1; + } + + return -EINVAL; +} + +static int sh_pfc_enum_in_range(u16 enum_id, const struct pinmux_range *r) +{ + if (enum_id < r->begin) + return 0; + + if (enum_id > r->end) + return 0; + + return 1; +} + +u32 sh_pfc_read_raw_reg(void __iomem *mapped_reg, unsigned int 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; +} + +void sh_pfc_write_raw_reg(void __iomem *mapped_reg, unsigned int reg_width, + u32 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(); +} + +static void sh_pfc_config_reg_helper(struct sh_pfc *pfc, + const struct pinmux_cfg_reg *crp, + unsigned int in_pos, + void __iomem **mapped_regp, u32 *maskp, + unsigned int *posp) +{ + unsigned int k; + + *mapped_regp = sh_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 void sh_pfc_write_config_reg(struct sh_pfc *pfc, + const struct pinmux_cfg_reg *crp, + unsigned int field, u32 value) +{ + void __iomem *mapped_reg; + unsigned int pos; + u32 mask, data; + + sh_pfc_config_reg_helper(pfc, crp, field, &mapped_reg, &mask, &pos); + + dev_dbg(pfc->dev, "write_reg addr = %x, value = 0x%x, field = %u, " + "r_width = %u, f_width = %u\n", + crp->reg, value, field, crp->reg_width, crp->field_width); + + mask = ~(mask << pos); + value = value << pos; + + data = sh_pfc_read_raw_reg(mapped_reg, crp->reg_width); + data &= mask; + data |= value; + + if (pfc->info->unlock_reg) + sh_pfc_write_raw_reg( + sh_pfc_phys_to_virt(pfc, pfc->info->unlock_reg), 32, + ~data); + + sh_pfc_write_raw_reg(mapped_reg, crp->reg_width, data); +} + +static int sh_pfc_get_config_reg(struct sh_pfc *pfc, u16 enum_id, + const struct pinmux_cfg_reg **crp, + unsigned int *fieldp, u32 *valuep) +{ + unsigned int k = 0; + + while (1) { + const struct pinmux_cfg_reg *config_reg = + pfc->info->cfg_regs + k; + unsigned int r_width = config_reg->reg_width; + unsigned int f_width = config_reg->field_width; + unsigned int curr_width; + unsigned int bit_pos; + unsigned int pos = 0; + unsigned int m = 0; + + if (!r_width) + break; + + for (bit_pos = 0; bit_pos < r_width; bit_pos += curr_width) { + u32 ncomb; + u32 n; + + 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; + return 0; + } + } + pos += ncomb; + m++; + } + k++; + } + + return -EINVAL; +} + +static int sh_pfc_mark_to_enum(struct sh_pfc *pfc, u16 mark, int pos, + u16 *enum_idp) +{ + const u16 *data = pfc->info->gpio_data; + unsigned int k; + + if (pos) { + *enum_idp = data[pos + 1]; + return pos + 1; + } + + for (k = 0; k < pfc->info->gpio_data_size; k++) { + if (data[k] == mark) { + *enum_idp = data[k + 1]; + return k + 1; + } + } + + dev_err(pfc->dev, "cannot locate data/mark enum_id for mark %d\n", + mark); + return -EINVAL; +} + +int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned mark, int pinmux_type) +{ + const struct pinmux_range *range; + int pos = 0; + + switch (pinmux_type) { + case PINMUX_TYPE_GPIO: + case PINMUX_TYPE_FUNCTION: + range = NULL; + break; + + case PINMUX_TYPE_OUTPUT: + range = &pfc->info->output; + break; + + case PINMUX_TYPE_INPUT: + range = &pfc->info->input; + break; + + default: + return -EINVAL; + } + + /* Iterate over all the configuration fields we need to update. */ + while (1) { + const struct pinmux_cfg_reg *cr; + unsigned int field; + u16 enum_id; + u32 value; + int in_range; + int ret; + + pos = sh_pfc_mark_to_enum(pfc, mark, pos, &enum_id); + if (pos < 0) + return pos; + + if (!enum_id) + break; + + /* Check if the configuration field selects a function. If it + * doesn't, skip the field if it's not applicable to the + * requested pinmux type. + */ + in_range = sh_pfc_enum_in_range(enum_id, &pfc->info->function); + if (!in_range) { + if (pinmux_type == PINMUX_TYPE_FUNCTION) { + /* Functions are allowed to modify all + * fields. + */ + in_range = 1; + } else if (pinmux_type != PINMUX_TYPE_GPIO) { + /* Input/output types can only modify fields + * that correspond to their respective ranges. + */ + in_range = sh_pfc_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; + } + /* GPIOs are only allowed to modify function fields. */ + } + + if (!in_range) + continue; + + ret = sh_pfc_get_config_reg(pfc, enum_id, &cr, &field, &value); + if (ret < 0) + return ret; + + sh_pfc_write_config_reg(pfc, cr, field, value); + } + + return 0; +} + +static int sh_pfc_init_ranges(struct sh_pfc *pfc) +{ + struct sh_pfc_pin_range *range; + unsigned int nr_ranges; + unsigned int i; + + if (pfc->info->pins[0].pin == (u16)-1) { + /* Pin number -1 denotes that the SoC doesn't report pin numbers + * in its pin arrays yet. Consider the pin numbers range as + * continuous and allocate a single range. + */ + pfc->nr_ranges = 1; + pfc->ranges = devm_kzalloc(pfc->dev, sizeof(*pfc->ranges), + GFP_KERNEL); + if (pfc->ranges == NULL) + return -ENOMEM; + + pfc->ranges->start = 0; + pfc->ranges->end = pfc->info->nr_pins - 1; + pfc->nr_gpio_pins = pfc->info->nr_pins; + + return 0; + } + + /* Count, allocate and fill the ranges. The PFC SoC data pins array must + * be sorted by pin numbers, and pins without a GPIO port must come + * last. + */ + for (i = 1, nr_ranges = 1; i < pfc->info->nr_pins; ++i) { + if (pfc->info->pins[i-1].pin != pfc->info->pins[i].pin - 1) + nr_ranges++; + } + + pfc->nr_ranges = nr_ranges; + pfc->ranges = devm_kzalloc(pfc->dev, sizeof(*pfc->ranges) * nr_ranges, + GFP_KERNEL); + if (pfc->ranges == NULL) + return -ENOMEM; + + range = pfc->ranges; + range->start = pfc->info->pins[0].pin; + + for (i = 1; i < pfc->info->nr_pins; ++i) { + if (pfc->info->pins[i-1].pin == pfc->info->pins[i].pin - 1) + continue; + + range->end = pfc->info->pins[i-1].pin; + if (!(pfc->info->pins[i-1].configs & SH_PFC_PIN_CFG_NO_GPIO)) + pfc->nr_gpio_pins = range->end + 1; + + range++; + range->start = pfc->info->pins[i].pin; + } + + range->end = pfc->info->pins[i-1].pin; + if (!(pfc->info->pins[i-1].configs & SH_PFC_PIN_CFG_NO_GPIO)) + pfc->nr_gpio_pins = range->end + 1; + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id sh_pfc_of_table[] = { +#ifdef CONFIG_PINCTRL_PFC_EMEV2 + { + .compatible = "renesas,pfc-emev2", + .data = &emev2_pinmux_info, + }, +#endif +#ifdef CONFIG_PINCTRL_PFC_R8A73A4 + { + .compatible = "renesas,pfc-r8a73a4", + .data = &r8a73a4_pinmux_info, + }, +#endif +#ifdef CONFIG_PINCTRL_PFC_R8A7740 + { + .compatible = "renesas,pfc-r8a7740", + .data = &r8a7740_pinmux_info, + }, +#endif +#ifdef CONFIG_PINCTRL_PFC_R8A7778 + { + .compatible = "renesas,pfc-r8a7778", + .data = &r8a7778_pinmux_info, + }, +#endif +#ifdef CONFIG_PINCTRL_PFC_R8A7779 + { + .compatible = "renesas,pfc-r8a7779", + .data = &r8a7779_pinmux_info, + }, +#endif +#ifdef CONFIG_PINCTRL_PFC_R8A7790 + { + .compatible = "renesas,pfc-r8a7790", + .data = &r8a7790_pinmux_info, + }, +#endif +#ifdef CONFIG_PINCTRL_PFC_R8A7791 + { + .compatible = "renesas,pfc-r8a7791", + .data = &r8a7791_pinmux_info, + }, +#endif +#ifdef CONFIG_PINCTRL_PFC_SH73A0 + { + .compatible = "renesas,pfc-sh73a0", + .data = &sh73a0_pinmux_info, + }, +#endif + { }, +}; +MODULE_DEVICE_TABLE(of, sh_pfc_of_table); +#endif + +static int sh_pfc_probe(struct platform_device *pdev) +{ + const struct platform_device_id *platid = platform_get_device_id(pdev); +#ifdef CONFIG_OF + struct device_node *np = pdev->dev.of_node; +#endif + const struct sh_pfc_soc_info *info; + struct sh_pfc *pfc; + int ret; + +#ifdef CONFIG_OF + if (np) + info = of_match_device(sh_pfc_of_table, &pdev->dev)->data; + else +#endif + info = platid ? (const void *)platid->driver_data : NULL; + + if (info == NULL) + return -ENODEV; + + pfc = devm_kzalloc(&pdev->dev, sizeof(*pfc), GFP_KERNEL); + if (pfc == NULL) + return -ENOMEM; + + pfc->info = info; + pfc->dev = &pdev->dev; + + ret = sh_pfc_map_resources(pfc, pdev); + if (unlikely(ret < 0)) + return ret; + + spin_lock_init(&pfc->lock); + + if (info->ops && info->ops->init) { + ret = info->ops->init(pfc); + if (ret < 0) + return ret; + } + + pinctrl_provide_dummies(); + + ret = sh_pfc_init_ranges(pfc); + if (ret < 0) + return ret; + + /* + * Initialize pinctrl bindings first + */ + ret = sh_pfc_register_pinctrl(pfc); + if (unlikely(ret != 0)) + return ret; + +#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. + */ + dev_notice(pfc->dev, "failed to init GPIO chip, ignoring...\n"); + } +#endif + + platform_set_drvdata(pdev, pfc); + + dev_info(pfc->dev, "%s support registered\n", info->name); + + return 0; +} + +static int 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); + + return 0; +} + +static const struct platform_device_id sh_pfc_id_table[] = { +#ifdef CONFIG_PINCTRL_PFC_R8A73A4 + { "pfc-r8a73a4", (kernel_ulong_t)&r8a73a4_pinmux_info }, +#endif +#ifdef CONFIG_PINCTRL_PFC_R8A7740 + { "pfc-r8a7740", (kernel_ulong_t)&r8a7740_pinmux_info }, +#endif +#ifdef CONFIG_PINCTRL_PFC_R8A7778 + { "pfc-r8a7778", (kernel_ulong_t)&r8a7778_pinmux_info }, +#endif +#ifdef CONFIG_PINCTRL_PFC_R8A7779 + { "pfc-r8a7779", (kernel_ulong_t)&r8a7779_pinmux_info }, +#endif +#ifdef CONFIG_PINCTRL_PFC_SH7203 + { "pfc-sh7203", (kernel_ulong_t)&sh7203_pinmux_info }, +#endif +#ifdef CONFIG_PINCTRL_PFC_SH7264 + { "pfc-sh7264", (kernel_ulong_t)&sh7264_pinmux_info }, +#endif +#ifdef CONFIG_PINCTRL_PFC_SH7269 + { "pfc-sh7269", (kernel_ulong_t)&sh7269_pinmux_info }, +#endif +#ifdef CONFIG_PINCTRL_PFC_SH73A0 + { "pfc-sh73a0", (kernel_ulong_t)&sh73a0_pinmux_info }, +#endif +#ifdef CONFIG_PINCTRL_PFC_SH7720 + { "pfc-sh7720", (kernel_ulong_t)&sh7720_pinmux_info }, +#endif +#ifdef CONFIG_PINCTRL_PFC_SH7722 + { "pfc-sh7722", (kernel_ulong_t)&sh7722_pinmux_info }, +#endif +#ifdef CONFIG_PINCTRL_PFC_SH7723 + { "pfc-sh7723", (kernel_ulong_t)&sh7723_pinmux_info }, +#endif +#ifdef CONFIG_PINCTRL_PFC_SH7724 + { "pfc-sh7724", (kernel_ulong_t)&sh7724_pinmux_info }, +#endif +#ifdef CONFIG_PINCTRL_PFC_SH7734 + { "pfc-sh7734", (kernel_ulong_t)&sh7734_pinmux_info }, +#endif +#ifdef CONFIG_PINCTRL_PFC_SH7757 + { "pfc-sh7757", (kernel_ulong_t)&sh7757_pinmux_info }, +#endif +#ifdef CONFIG_PINCTRL_PFC_SH7785 + { "pfc-sh7785", (kernel_ulong_t)&sh7785_pinmux_info }, +#endif +#ifdef CONFIG_PINCTRL_PFC_SH7786 + { "pfc-sh7786", (kernel_ulong_t)&sh7786_pinmux_info }, +#endif +#ifdef CONFIG_PINCTRL_PFC_SHX3 + { "pfc-shx3", (kernel_ulong_t)&shx3_pinmux_info }, +#endif + { "sh-pfc", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(platform, sh_pfc_id_table); + +static struct platform_driver sh_pfc_driver = { + .probe = sh_pfc_probe, + .remove = sh_pfc_remove, + .id_table = sh_pfc_id_table, + .driver = { + .name = DRV_NAME, + .of_match_table = of_match_ptr(sh_pfc_of_table), + }, +}; + +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, Laurent Pinchart"); +MODULE_DESCRIPTION("Pin Control and GPIO driver for SuperH pin function controller"); +MODULE_LICENSE("GPL v2"); -- cgit 1.2.3-korg