diff options
Diffstat (limited to 'drivers/pinctrl/sirf/pinctrl-sirf.c')
-rw-r--r-- | drivers/pinctrl/sirf/pinctrl-sirf.c | 894 |
1 files changed, 0 insertions, 894 deletions
diff --git a/drivers/pinctrl/sirf/pinctrl-sirf.c b/drivers/pinctrl/sirf/pinctrl-sirf.c deleted file mode 100644 index 63a287d5795f..000000000000 --- a/drivers/pinctrl/sirf/pinctrl-sirf.c +++ /dev/null @@ -1,894 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * pinmux driver for CSR SiRFprimaII - * - * Authors: - * Rongjun Ying <rongjun.ying@csr.com> - * Yuping Luo <yuping.luo@csr.com> - * Barry Song <baohua.song@csr.com> - * - * Copyright (c) 2011 - 2014 Cambridge Silicon Radio Limited, a CSR plc group - * company. - */ - -#include <linux/init.h> -#include <linux/irq.h> -#include <linux/platform_device.h> -#include <linux/io.h> -#include <linux/slab.h> -#include <linux/err.h> -#include <linux/pinctrl/pinctrl.h> -#include <linux/pinctrl/pinmux.h> -#include <linux/pinctrl/consumer.h> -#include <linux/pinctrl/machine.h> -#include <linux/of.h> -#include <linux/of_address.h> -#include <linux/of_device.h> -#include <linux/of_platform.h> -#include <linux/bitops.h> -#include <linux/gpio/driver.h> -#include <linux/of_gpio.h> - -#include "pinctrl-sirf.h" - -#define DRIVER_NAME "pinmux-sirf" - -struct sirfsoc_gpio_bank { - int id; - int parent_irq; - spinlock_t lock; -}; - -struct sirfsoc_gpio_chip { - struct of_mm_gpio_chip chip; - struct sirfsoc_gpio_bank sgpio_bank[SIRFSOC_GPIO_NO_OF_BANKS]; - spinlock_t lock; -}; - -static struct sirfsoc_pin_group *sirfsoc_pin_groups; -static int sirfsoc_pingrp_cnt; - -static int sirfsoc_get_groups_count(struct pinctrl_dev *pctldev) -{ - return sirfsoc_pingrp_cnt; -} - -static const char *sirfsoc_get_group_name(struct pinctrl_dev *pctldev, - unsigned selector) -{ - return sirfsoc_pin_groups[selector].name; -} - -static int sirfsoc_get_group_pins(struct pinctrl_dev *pctldev, - unsigned selector, - const unsigned **pins, - unsigned *num_pins) -{ - *pins = sirfsoc_pin_groups[selector].pins; - *num_pins = sirfsoc_pin_groups[selector].num_pins; - return 0; -} - -static void sirfsoc_pin_dbg_show(struct pinctrl_dev *pctldev, - struct seq_file *s, unsigned offset) -{ - seq_printf(s, " " DRIVER_NAME); -} - -static int sirfsoc_dt_node_to_map(struct pinctrl_dev *pctldev, - struct device_node *np_config, - struct pinctrl_map **map, unsigned *num_maps) -{ - struct sirfsoc_pmx *spmx = pinctrl_dev_get_drvdata(pctldev); - struct device_node *np; - struct property *prop; - const char *function, *group; - int ret, index = 0, count = 0; - - /* calculate number of maps required */ - for_each_child_of_node(np_config, np) { - ret = of_property_read_string(np, "sirf,function", &function); - if (ret < 0) { - of_node_put(np); - return ret; - } - - ret = of_property_count_strings(np, "sirf,pins"); - if (ret < 0) { - of_node_put(np); - return ret; - } - - count += ret; - } - - if (!count) { - dev_err(spmx->dev, "No child nodes passed via DT\n"); - return -ENODEV; - } - - *map = kcalloc(count, sizeof(**map), GFP_KERNEL); - if (!*map) - return -ENOMEM; - - for_each_child_of_node(np_config, np) { - of_property_read_string(np, "sirf,function", &function); - of_property_for_each_string(np, "sirf,pins", prop, group) { - (*map)[index].type = PIN_MAP_TYPE_MUX_GROUP; - (*map)[index].data.mux.group = group; - (*map)[index].data.mux.function = function; - index++; - } - } - - *num_maps = count; - - return 0; -} - -static void sirfsoc_dt_free_map(struct pinctrl_dev *pctldev, - struct pinctrl_map *map, unsigned num_maps) -{ - kfree(map); -} - -static const struct pinctrl_ops sirfsoc_pctrl_ops = { - .get_groups_count = sirfsoc_get_groups_count, - .get_group_name = sirfsoc_get_group_name, - .get_group_pins = sirfsoc_get_group_pins, - .pin_dbg_show = sirfsoc_pin_dbg_show, - .dt_node_to_map = sirfsoc_dt_node_to_map, - .dt_free_map = sirfsoc_dt_free_map, -}; - -static struct sirfsoc_pmx_func *sirfsoc_pmx_functions; -static int sirfsoc_pmxfunc_cnt; - -static void sirfsoc_pinmux_endisable(struct sirfsoc_pmx *spmx, - unsigned selector, bool enable) -{ - int i; - const struct sirfsoc_padmux *mux = - sirfsoc_pmx_functions[selector].padmux; - const struct sirfsoc_muxmask *mask = mux->muxmask; - - for (i = 0; i < mux->muxmask_counts; i++) { - u32 muxval; - muxval = readl(spmx->gpio_virtbase + - SIRFSOC_GPIO_PAD_EN(mask[i].group)); - if (enable) - muxval = muxval & ~mask[i].mask; - else - muxval = muxval | mask[i].mask; - writel(muxval, spmx->gpio_virtbase + - SIRFSOC_GPIO_PAD_EN(mask[i].group)); - } - - if (mux->funcmask && enable) { - u32 func_en_val; - - func_en_val = - readl(spmx->rsc_virtbase + mux->ctrlreg); - func_en_val = - (func_en_val & ~mux->funcmask) | (mux->funcval); - writel(func_en_val, spmx->rsc_virtbase + mux->ctrlreg); - } -} - -static int sirfsoc_pinmux_set_mux(struct pinctrl_dev *pmxdev, - unsigned selector, - unsigned group) -{ - struct sirfsoc_pmx *spmx; - - spmx = pinctrl_dev_get_drvdata(pmxdev); - sirfsoc_pinmux_endisable(spmx, selector, true); - - return 0; -} - -static int sirfsoc_pinmux_get_funcs_count(struct pinctrl_dev *pmxdev) -{ - return sirfsoc_pmxfunc_cnt; -} - -static const char *sirfsoc_pinmux_get_func_name(struct pinctrl_dev *pctldev, - unsigned selector) -{ - return sirfsoc_pmx_functions[selector].name; -} - -static int sirfsoc_pinmux_get_groups(struct pinctrl_dev *pctldev, - unsigned selector, - const char * const **groups, - unsigned * const num_groups) -{ - *groups = sirfsoc_pmx_functions[selector].groups; - *num_groups = sirfsoc_pmx_functions[selector].num_groups; - return 0; -} - -static int sirfsoc_pinmux_request_gpio(struct pinctrl_dev *pmxdev, - struct pinctrl_gpio_range *range, unsigned offset) -{ - struct sirfsoc_pmx *spmx; - - int group = range->id; - - u32 muxval; - - spmx = pinctrl_dev_get_drvdata(pmxdev); - - muxval = readl(spmx->gpio_virtbase + - SIRFSOC_GPIO_PAD_EN(group)); - muxval = muxval | (1 << (offset - range->pin_base)); - writel(muxval, spmx->gpio_virtbase + - SIRFSOC_GPIO_PAD_EN(group)); - - return 0; -} - -static const struct pinmux_ops sirfsoc_pinmux_ops = { - .set_mux = sirfsoc_pinmux_set_mux, - .get_functions_count = sirfsoc_pinmux_get_funcs_count, - .get_function_name = sirfsoc_pinmux_get_func_name, - .get_function_groups = sirfsoc_pinmux_get_groups, - .gpio_request_enable = sirfsoc_pinmux_request_gpio, -}; - -static struct pinctrl_desc sirfsoc_pinmux_desc = { - .name = DRIVER_NAME, - .pctlops = &sirfsoc_pctrl_ops, - .pmxops = &sirfsoc_pinmux_ops, - .owner = THIS_MODULE, -}; - -static void __iomem *sirfsoc_rsc_of_iomap(void) -{ - const struct of_device_id rsc_ids[] = { - { .compatible = "sirf,prima2-rsc" }, - {} - }; - struct device_node *np; - - np = of_find_matching_node(NULL, rsc_ids); - if (!np) - panic("unable to find compatible rsc node in dtb\n"); - - return of_iomap(np, 0); -} - -static int sirfsoc_gpio_of_xlate(struct gpio_chip *gc, - const struct of_phandle_args *gpiospec, - u32 *flags) -{ - if (gpiospec->args[0] > SIRFSOC_GPIO_NO_OF_BANKS * SIRFSOC_GPIO_BANK_SIZE) - return -EINVAL; - - if (flags) - *flags = gpiospec->args[1]; - - return gpiospec->args[0]; -} - -static const struct of_device_id pinmux_ids[] = { - { .compatible = "sirf,prima2-pinctrl", .data = &prima2_pinctrl_data, }, - { .compatible = "sirf,atlas6-pinctrl", .data = &atlas6_pinctrl_data, }, - {} -}; - -static int sirfsoc_pinmux_probe(struct platform_device *pdev) -{ - int ret; - struct sirfsoc_pmx *spmx; - struct device_node *np = pdev->dev.of_node; - const struct sirfsoc_pinctrl_data *pdata; - - /* Create state holders etc for this driver */ - spmx = devm_kzalloc(&pdev->dev, sizeof(*spmx), GFP_KERNEL); - if (!spmx) - return -ENOMEM; - - spmx->dev = &pdev->dev; - - platform_set_drvdata(pdev, spmx); - - spmx->gpio_virtbase = of_iomap(np, 0); - if (!spmx->gpio_virtbase) { - dev_err(&pdev->dev, "can't map gpio registers\n"); - return -ENOMEM; - } - - spmx->rsc_virtbase = sirfsoc_rsc_of_iomap(); - if (!spmx->rsc_virtbase) { - ret = -ENOMEM; - dev_err(&pdev->dev, "can't map rsc registers\n"); - goto out_no_rsc_remap; - } - - pdata = of_match_node(pinmux_ids, np)->data; - sirfsoc_pin_groups = pdata->grps; - sirfsoc_pingrp_cnt = pdata->grps_cnt; - sirfsoc_pmx_functions = pdata->funcs; - sirfsoc_pmxfunc_cnt = pdata->funcs_cnt; - sirfsoc_pinmux_desc.pins = pdata->pads; - sirfsoc_pinmux_desc.npins = pdata->pads_cnt; - - - /* Now register the pin controller and all pins it handles */ - spmx->pmx = pinctrl_register(&sirfsoc_pinmux_desc, &pdev->dev, spmx); - if (IS_ERR(spmx->pmx)) { - dev_err(&pdev->dev, "could not register SIRFSOC pinmux driver\n"); - ret = PTR_ERR(spmx->pmx); - goto out_no_pmx; - } - - dev_info(&pdev->dev, "initialized SIRFSOC pinmux driver\n"); - - return 0; - -out_no_pmx: - iounmap(spmx->rsc_virtbase); -out_no_rsc_remap: - iounmap(spmx->gpio_virtbase); - return ret; -} - -#ifdef CONFIG_PM_SLEEP -static int sirfsoc_pinmux_suspend_noirq(struct device *dev) -{ - int i, j; - struct sirfsoc_pmx *spmx = dev_get_drvdata(dev); - - for (i = 0; i < SIRFSOC_GPIO_NO_OF_BANKS; i++) { - for (j = 0; j < SIRFSOC_GPIO_BANK_SIZE; j++) { - spmx->gpio_regs[i][j] = readl(spmx->gpio_virtbase + - SIRFSOC_GPIO_CTRL(i, j)); - } - spmx->ints_regs[i] = readl(spmx->gpio_virtbase + - SIRFSOC_GPIO_INT_STATUS(i)); - spmx->paden_regs[i] = readl(spmx->gpio_virtbase + - SIRFSOC_GPIO_PAD_EN(i)); - } - spmx->dspen_regs = readl(spmx->gpio_virtbase + SIRFSOC_GPIO_DSP_EN0); - - for (i = 0; i < 3; i++) - spmx->rsc_regs[i] = readl(spmx->rsc_virtbase + 4 * i); - - return 0; -} - -static int sirfsoc_pinmux_resume_noirq(struct device *dev) -{ - int i, j; - struct sirfsoc_pmx *spmx = dev_get_drvdata(dev); - - for (i = 0; i < SIRFSOC_GPIO_NO_OF_BANKS; i++) { - for (j = 0; j < SIRFSOC_GPIO_BANK_SIZE; j++) { - writel(spmx->gpio_regs[i][j], spmx->gpio_virtbase + - SIRFSOC_GPIO_CTRL(i, j)); - } - writel(spmx->ints_regs[i], spmx->gpio_virtbase + - SIRFSOC_GPIO_INT_STATUS(i)); - writel(spmx->paden_regs[i], spmx->gpio_virtbase + - SIRFSOC_GPIO_PAD_EN(i)); - } - writel(spmx->dspen_regs, spmx->gpio_virtbase + SIRFSOC_GPIO_DSP_EN0); - - for (i = 0; i < 3; i++) - writel(spmx->rsc_regs[i], spmx->rsc_virtbase + 4 * i); - - return 0; -} - -static const struct dev_pm_ops sirfsoc_pinmux_pm_ops = { - .suspend_noirq = sirfsoc_pinmux_suspend_noirq, - .resume_noirq = sirfsoc_pinmux_resume_noirq, - .freeze_noirq = sirfsoc_pinmux_suspend_noirq, - .restore_noirq = sirfsoc_pinmux_resume_noirq, -}; -#endif - -static struct platform_driver sirfsoc_pinmux_driver = { - .driver = { - .name = DRIVER_NAME, - .of_match_table = pinmux_ids, -#ifdef CONFIG_PM_SLEEP - .pm = &sirfsoc_pinmux_pm_ops, -#endif - }, - .probe = sirfsoc_pinmux_probe, -}; - -static int __init sirfsoc_pinmux_init(void) -{ - return platform_driver_register(&sirfsoc_pinmux_driver); -} -arch_initcall(sirfsoc_pinmux_init); - -static inline struct sirfsoc_gpio_bank * -sirfsoc_gpio_to_bank(struct sirfsoc_gpio_chip *sgpio, unsigned int offset) -{ - return &sgpio->sgpio_bank[offset / SIRFSOC_GPIO_BANK_SIZE]; -} - -static inline int sirfsoc_gpio_to_bankoff(unsigned int offset) -{ - return offset % SIRFSOC_GPIO_BANK_SIZE; -} - -static void sirfsoc_gpio_irq_ack(struct irq_data *d) -{ - struct gpio_chip *gc = irq_data_get_irq_chip_data(d); - struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(gc); - struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, d->hwirq); - int idx = sirfsoc_gpio_to_bankoff(d->hwirq); - u32 val, offset; - unsigned long flags; - - offset = SIRFSOC_GPIO_CTRL(bank->id, idx); - - spin_lock_irqsave(&sgpio->lock, flags); - - val = readl(sgpio->chip.regs + offset); - - writel(val, sgpio->chip.regs + offset); - - spin_unlock_irqrestore(&sgpio->lock, flags); -} - -static void __sirfsoc_gpio_irq_mask(struct sirfsoc_gpio_chip *sgpio, - struct sirfsoc_gpio_bank *bank, - int idx) -{ - u32 val, offset; - unsigned long flags; - - offset = SIRFSOC_GPIO_CTRL(bank->id, idx); - - spin_lock_irqsave(&sgpio->lock, flags); - - val = readl(sgpio->chip.regs + offset); - val &= ~SIRFSOC_GPIO_CTL_INTR_EN_MASK; - val &= ~SIRFSOC_GPIO_CTL_INTR_STS_MASK; - writel(val, sgpio->chip.regs + offset); - - spin_unlock_irqrestore(&sgpio->lock, flags); -} - -static void sirfsoc_gpio_irq_mask(struct irq_data *d) -{ - struct gpio_chip *gc = irq_data_get_irq_chip_data(d); - struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(gc); - struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, d->hwirq); - - __sirfsoc_gpio_irq_mask(sgpio, bank, d->hwirq % SIRFSOC_GPIO_BANK_SIZE); -} - -static void sirfsoc_gpio_irq_unmask(struct irq_data *d) -{ - struct gpio_chip *gc = irq_data_get_irq_chip_data(d); - struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(gc); - struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, d->hwirq); - int idx = sirfsoc_gpio_to_bankoff(d->hwirq); - u32 val, offset; - unsigned long flags; - - offset = SIRFSOC_GPIO_CTRL(bank->id, idx); - - spin_lock_irqsave(&sgpio->lock, flags); - - val = readl(sgpio->chip.regs + offset); - val &= ~SIRFSOC_GPIO_CTL_INTR_STS_MASK; - val |= SIRFSOC_GPIO_CTL_INTR_EN_MASK; - writel(val, sgpio->chip.regs + offset); - - spin_unlock_irqrestore(&sgpio->lock, flags); -} - -static int sirfsoc_gpio_irq_type(struct irq_data *d, unsigned type) -{ - struct gpio_chip *gc = irq_data_get_irq_chip_data(d); - struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(gc); - struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, d->hwirq); - int idx = sirfsoc_gpio_to_bankoff(d->hwirq); - u32 val, offset; - unsigned long flags; - - offset = SIRFSOC_GPIO_CTRL(bank->id, idx); - - spin_lock_irqsave(&sgpio->lock, flags); - - val = readl(sgpio->chip.regs + offset); - val &= ~(SIRFSOC_GPIO_CTL_INTR_STS_MASK | SIRFSOC_GPIO_CTL_OUT_EN_MASK); - - switch (type) { - case IRQ_TYPE_NONE: - break; - case IRQ_TYPE_EDGE_RISING: - val |= SIRFSOC_GPIO_CTL_INTR_HIGH_MASK | - SIRFSOC_GPIO_CTL_INTR_TYPE_MASK; - val &= ~SIRFSOC_GPIO_CTL_INTR_LOW_MASK; - break; - case IRQ_TYPE_EDGE_FALLING: - val &= ~SIRFSOC_GPIO_CTL_INTR_HIGH_MASK; - val |= SIRFSOC_GPIO_CTL_INTR_LOW_MASK | - SIRFSOC_GPIO_CTL_INTR_TYPE_MASK; - break; - case IRQ_TYPE_EDGE_BOTH: - val |= SIRFSOC_GPIO_CTL_INTR_HIGH_MASK | - SIRFSOC_GPIO_CTL_INTR_LOW_MASK | - SIRFSOC_GPIO_CTL_INTR_TYPE_MASK; - break; - case IRQ_TYPE_LEVEL_LOW: - val &= ~(SIRFSOC_GPIO_CTL_INTR_HIGH_MASK | - SIRFSOC_GPIO_CTL_INTR_TYPE_MASK); - val |= SIRFSOC_GPIO_CTL_INTR_LOW_MASK; - break; - case IRQ_TYPE_LEVEL_HIGH: - val |= SIRFSOC_GPIO_CTL_INTR_HIGH_MASK; - val &= ~(SIRFSOC_GPIO_CTL_INTR_LOW_MASK | - SIRFSOC_GPIO_CTL_INTR_TYPE_MASK); - break; - } - - writel(val, sgpio->chip.regs + offset); - - spin_unlock_irqrestore(&sgpio->lock, flags); - - return 0; -} - -static struct irq_chip sirfsoc_irq_chip = { - .name = "sirf-gpio-irq", - .irq_ack = sirfsoc_gpio_irq_ack, - .irq_mask = sirfsoc_gpio_irq_mask, - .irq_unmask = sirfsoc_gpio_irq_unmask, - .irq_set_type = sirfsoc_gpio_irq_type, -}; - -static void sirfsoc_gpio_handle_irq(struct irq_desc *desc) -{ - unsigned int irq = irq_desc_get_irq(desc); - struct gpio_chip *gc = irq_desc_get_handler_data(desc); - struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(gc); - struct sirfsoc_gpio_bank *bank; - u32 status, ctrl; - int idx = 0; - struct irq_chip *chip = irq_desc_get_chip(desc); - int i; - - for (i = 0; i < SIRFSOC_GPIO_NO_OF_BANKS; i++) { - bank = &sgpio->sgpio_bank[i]; - if (bank->parent_irq == irq) - break; - } - BUG_ON(i == SIRFSOC_GPIO_NO_OF_BANKS); - - chained_irq_enter(chip, desc); - - status = readl(sgpio->chip.regs + SIRFSOC_GPIO_INT_STATUS(bank->id)); - if (!status) { - printk(KERN_WARNING - "%s: gpio id %d status %#x no interrupt is flagged\n", - __func__, bank->id, status); - handle_bad_irq(desc); - return; - } - - while (status) { - ctrl = readl(sgpio->chip.regs + SIRFSOC_GPIO_CTRL(bank->id, idx)); - - /* - * Here we must check whether the corresponding GPIO's interrupt - * has been enabled, otherwise just skip it - */ - if ((status & 0x1) && (ctrl & SIRFSOC_GPIO_CTL_INTR_EN_MASK)) { - pr_debug("%s: gpio id %d idx %d happens\n", - __func__, bank->id, idx); - generic_handle_irq(irq_find_mapping(gc->irq.domain, idx + - bank->id * SIRFSOC_GPIO_BANK_SIZE)); - } - - idx++; - status = status >> 1; - } - - chained_irq_exit(chip, desc); -} - -static inline void sirfsoc_gpio_set_input(struct sirfsoc_gpio_chip *sgpio, - unsigned ctrl_offset) -{ - u32 val; - - val = readl(sgpio->chip.regs + ctrl_offset); - val &= ~SIRFSOC_GPIO_CTL_OUT_EN_MASK; - writel(val, sgpio->chip.regs + ctrl_offset); -} - -static int sirfsoc_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(chip); - struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, offset); - unsigned long flags; - - if (pinctrl_gpio_request(chip->base + offset)) - return -ENODEV; - - spin_lock_irqsave(&bank->lock, flags); - - /* - * default status: - * set direction as input and mask irq - */ - sirfsoc_gpio_set_input(sgpio, SIRFSOC_GPIO_CTRL(bank->id, offset)); - __sirfsoc_gpio_irq_mask(sgpio, bank, offset); - - spin_unlock_irqrestore(&bank->lock, flags); - - return 0; -} - -static void sirfsoc_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(chip); - struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, offset); - unsigned long flags; - - spin_lock_irqsave(&bank->lock, flags); - - __sirfsoc_gpio_irq_mask(sgpio, bank, offset); - sirfsoc_gpio_set_input(sgpio, SIRFSOC_GPIO_CTRL(bank->id, offset)); - - spin_unlock_irqrestore(&bank->lock, flags); - - pinctrl_gpio_free(chip->base + offset); -} - -static int sirfsoc_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) -{ - struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(chip); - struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, gpio); - int idx = sirfsoc_gpio_to_bankoff(gpio); - unsigned long flags; - unsigned offset; - - offset = SIRFSOC_GPIO_CTRL(bank->id, idx); - - spin_lock_irqsave(&bank->lock, flags); - - sirfsoc_gpio_set_input(sgpio, offset); - - spin_unlock_irqrestore(&bank->lock, flags); - - return 0; -} - -static inline void sirfsoc_gpio_set_output(struct sirfsoc_gpio_chip *sgpio, - struct sirfsoc_gpio_bank *bank, - unsigned offset, - int value) -{ - u32 out_ctrl; - unsigned long flags; - - spin_lock_irqsave(&bank->lock, flags); - - out_ctrl = readl(sgpio->chip.regs + offset); - if (value) - out_ctrl |= SIRFSOC_GPIO_CTL_DATAOUT_MASK; - else - out_ctrl &= ~SIRFSOC_GPIO_CTL_DATAOUT_MASK; - - out_ctrl &= ~SIRFSOC_GPIO_CTL_INTR_EN_MASK; - out_ctrl |= SIRFSOC_GPIO_CTL_OUT_EN_MASK; - writel(out_ctrl, sgpio->chip.regs + offset); - - spin_unlock_irqrestore(&bank->lock, flags); -} - -static int sirfsoc_gpio_direction_output(struct gpio_chip *chip, - unsigned gpio, int value) -{ - struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(chip); - struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, gpio); - int idx = sirfsoc_gpio_to_bankoff(gpio); - u32 offset; - unsigned long flags; - - offset = SIRFSOC_GPIO_CTRL(bank->id, idx); - - spin_lock_irqsave(&sgpio->lock, flags); - - sirfsoc_gpio_set_output(sgpio, bank, offset, value); - - spin_unlock_irqrestore(&sgpio->lock, flags); - - return 0; -} - -static int sirfsoc_gpio_get_value(struct gpio_chip *chip, unsigned offset) -{ - struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(chip); - struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, offset); - u32 val; - unsigned long flags; - - spin_lock_irqsave(&bank->lock, flags); - - val = readl(sgpio->chip.regs + SIRFSOC_GPIO_CTRL(bank->id, offset)); - - spin_unlock_irqrestore(&bank->lock, flags); - - return !!(val & SIRFSOC_GPIO_CTL_DATAIN_MASK); -} - -static void sirfsoc_gpio_set_value(struct gpio_chip *chip, unsigned offset, - int value) -{ - struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(chip); - struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, offset); - u32 ctrl; - unsigned long flags; - - spin_lock_irqsave(&bank->lock, flags); - - ctrl = readl(sgpio->chip.regs + SIRFSOC_GPIO_CTRL(bank->id, offset)); - if (value) - ctrl |= SIRFSOC_GPIO_CTL_DATAOUT_MASK; - else - ctrl &= ~SIRFSOC_GPIO_CTL_DATAOUT_MASK; - writel(ctrl, sgpio->chip.regs + SIRFSOC_GPIO_CTRL(bank->id, offset)); - - spin_unlock_irqrestore(&bank->lock, flags); -} - -static void sirfsoc_gpio_set_pullup(struct sirfsoc_gpio_chip *sgpio, - const u32 *pullups) -{ - int i, n; - const unsigned long *p = (const unsigned long *)pullups; - - for (i = 0; i < SIRFSOC_GPIO_NO_OF_BANKS; i++) { - for_each_set_bit(n, p + i, BITS_PER_LONG) { - u32 offset = SIRFSOC_GPIO_CTRL(i, n); - u32 val = readl(sgpio->chip.regs + offset); - val |= SIRFSOC_GPIO_CTL_PULL_MASK; - val |= SIRFSOC_GPIO_CTL_PULL_HIGH; - writel(val, sgpio->chip.regs + offset); - } - } -} - -static void sirfsoc_gpio_set_pulldown(struct sirfsoc_gpio_chip *sgpio, - const u32 *pulldowns) -{ - int i, n; - const unsigned long *p = (const unsigned long *)pulldowns; - - for (i = 0; i < SIRFSOC_GPIO_NO_OF_BANKS; i++) { - for_each_set_bit(n, p + i, BITS_PER_LONG) { - u32 offset = SIRFSOC_GPIO_CTRL(i, n); - u32 val = readl(sgpio->chip.regs + offset); - val |= SIRFSOC_GPIO_CTL_PULL_MASK; - val &= ~SIRFSOC_GPIO_CTL_PULL_HIGH; - writel(val, sgpio->chip.regs + offset); - } - } -} - -static int sirfsoc_gpio_probe(struct device_node *np) -{ - int i, err = 0; - struct sirfsoc_gpio_chip *sgpio; - struct sirfsoc_gpio_bank *bank; - void __iomem *regs; - struct platform_device *pdev; - struct gpio_irq_chip *girq; - - u32 pullups[SIRFSOC_GPIO_NO_OF_BANKS], pulldowns[SIRFSOC_GPIO_NO_OF_BANKS]; - - pdev = of_find_device_by_node(np); - if (!pdev) - return -ENODEV; - - sgpio = devm_kzalloc(&pdev->dev, sizeof(*sgpio), GFP_KERNEL); - if (!sgpio) { - err = -ENOMEM; - goto out_put_device; - } - spin_lock_init(&sgpio->lock); - - regs = of_iomap(np, 0); - if (!regs) { - err = -ENOMEM; - goto out_put_device; - } - - sgpio->chip.gc.request = sirfsoc_gpio_request; - sgpio->chip.gc.free = sirfsoc_gpio_free; - sgpio->chip.gc.direction_input = sirfsoc_gpio_direction_input; - sgpio->chip.gc.get = sirfsoc_gpio_get_value; - sgpio->chip.gc.direction_output = sirfsoc_gpio_direction_output; - sgpio->chip.gc.set = sirfsoc_gpio_set_value; - sgpio->chip.gc.base = 0; - sgpio->chip.gc.ngpio = SIRFSOC_GPIO_BANK_SIZE * SIRFSOC_GPIO_NO_OF_BANKS; - sgpio->chip.gc.label = kasprintf(GFP_KERNEL, "%pOF", np); - sgpio->chip.gc.of_node = np; - sgpio->chip.gc.of_xlate = sirfsoc_gpio_of_xlate; - sgpio->chip.gc.of_gpio_n_cells = 2; - sgpio->chip.gc.parent = &pdev->dev; - sgpio->chip.regs = regs; - - girq = &sgpio->chip.gc.irq; - girq->chip = &sirfsoc_irq_chip; - girq->parent_handler = sirfsoc_gpio_handle_irq; - girq->num_parents = SIRFSOC_GPIO_NO_OF_BANKS; - girq->parents = devm_kcalloc(&pdev->dev, SIRFSOC_GPIO_NO_OF_BANKS, - sizeof(*girq->parents), - GFP_KERNEL); - if (!girq->parents) { - err = -ENOMEM; - goto out_put_device; - } - for (i = 0; i < SIRFSOC_GPIO_NO_OF_BANKS; i++) { - bank = &sgpio->sgpio_bank[i]; - spin_lock_init(&bank->lock); - bank->parent_irq = platform_get_irq(pdev, i); - if (bank->parent_irq < 0) { - err = bank->parent_irq; - goto out; - } - girq->parents[i] = bank->parent_irq; - } - girq->default_type = IRQ_TYPE_NONE; - girq->handler = handle_level_irq; - - err = gpiochip_add_data(&sgpio->chip.gc, sgpio); - if (err) { - dev_err(&pdev->dev, "%pOF: error in probe function with status %d\n", - np, err); - goto out; - } - - err = gpiochip_add_pin_range(&sgpio->chip.gc, dev_name(&pdev->dev), - 0, 0, SIRFSOC_GPIO_BANK_SIZE * SIRFSOC_GPIO_NO_OF_BANKS); - if (err) { - dev_err(&pdev->dev, - "could not add gpiochip pin range\n"); - goto out_no_range; - } - - if (!of_property_read_u32_array(np, "sirf,pullups", pullups, - SIRFSOC_GPIO_NO_OF_BANKS)) - sirfsoc_gpio_set_pullup(sgpio, pullups); - - if (!of_property_read_u32_array(np, "sirf,pulldowns", pulldowns, - SIRFSOC_GPIO_NO_OF_BANKS)) - sirfsoc_gpio_set_pulldown(sgpio, pulldowns); - - return 0; - -out_no_range: - gpiochip_remove(&sgpio->chip.gc); -out: - iounmap(regs); -out_put_device: - put_device(&pdev->dev); - return err; -} - -static int __init sirfsoc_gpio_init(void) -{ - - struct device_node *np; - - np = of_find_matching_node(NULL, pinmux_ids); - - if (!np) - return -ENODEV; - - return sirfsoc_gpio_probe(np); -} -subsys_initcall(sirfsoc_gpio_init); |