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https://github.com/brain-hackers/u-boot-brain
synced 2024-08-30 22:08:52 +09:00
![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
375 lines
8.2 KiB
C
375 lines
8.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2012 Henrik Nordstrom <henrik@henriknordstrom.net>
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*
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* Based on earlier arch/arm/cpu/armv7/sunxi/gpio.c:
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*
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* (C) Copyright 2007-2011
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* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
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* Tom Cubie <tangliang@allwinnertech.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <fdtdec.h>
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#include <malloc.h>
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#include <asm/arch/gpio.h>
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#include <asm/io.h>
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#include <asm/gpio.h>
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#include <dm/device-internal.h>
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#include <dt-bindings/gpio/gpio.h>
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#define SUNXI_GPIOS_PER_BANK SUNXI_GPIO_A_NR
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struct sunxi_gpio_platdata {
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struct sunxi_gpio *regs;
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const char *bank_name; /* Name of bank, e.g. "B" */
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int gpio_count;
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};
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#ifndef CONFIG_DM_GPIO
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static int sunxi_gpio_output(u32 pin, u32 val)
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{
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u32 dat;
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u32 bank = GPIO_BANK(pin);
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u32 num = GPIO_NUM(pin);
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struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
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dat = readl(&pio->dat);
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if (val)
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dat |= 0x1 << num;
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else
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dat &= ~(0x1 << num);
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writel(dat, &pio->dat);
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return 0;
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}
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static int sunxi_gpio_input(u32 pin)
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{
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u32 dat;
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u32 bank = GPIO_BANK(pin);
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u32 num = GPIO_NUM(pin);
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struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
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dat = readl(&pio->dat);
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dat >>= num;
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return dat & 0x1;
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}
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int gpio_request(unsigned gpio, const char *label)
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{
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return 0;
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}
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int gpio_free(unsigned gpio)
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{
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return 0;
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}
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int gpio_direction_input(unsigned gpio)
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{
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sunxi_gpio_set_cfgpin(gpio, SUNXI_GPIO_INPUT);
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return 0;
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}
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int gpio_direction_output(unsigned gpio, int value)
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{
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sunxi_gpio_set_cfgpin(gpio, SUNXI_GPIO_OUTPUT);
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return sunxi_gpio_output(gpio, value);
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}
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int gpio_get_value(unsigned gpio)
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{
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return sunxi_gpio_input(gpio);
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}
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int gpio_set_value(unsigned gpio, int value)
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{
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return sunxi_gpio_output(gpio, value);
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}
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int sunxi_name_to_gpio(const char *name)
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{
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int group = 0;
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int groupsize = 9 * 32;
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long pin;
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char *eptr;
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if (*name == 'P' || *name == 'p')
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name++;
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if (*name >= 'A') {
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group = *name - (*name > 'a' ? 'a' : 'A');
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groupsize = 32;
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name++;
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}
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pin = simple_strtol(name, &eptr, 10);
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if (!*name || *eptr)
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return -1;
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if (pin < 0 || pin > groupsize || group >= 9)
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return -1;
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return group * 32 + pin;
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}
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#endif
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int sunxi_name_to_gpio_bank(const char *name)
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{
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int group = 0;
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if (*name == 'P' || *name == 'p')
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name++;
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if (*name >= 'A') {
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group = *name - (*name > 'a' ? 'a' : 'A');
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return group;
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}
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return -1;
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}
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#ifdef CONFIG_DM_GPIO
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/* TODO(sjg@chromium.org): Remove this function and use device tree */
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int sunxi_name_to_gpio(const char *name)
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{
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unsigned int gpio;
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int ret;
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#if !defined CONFIG_SPL_BUILD && defined CONFIG_AXP_GPIO
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char lookup[8];
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if (strcasecmp(name, "AXP0-VBUS-DETECT") == 0) {
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sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d",
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SUNXI_GPIO_AXP0_VBUS_DETECT);
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name = lookup;
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} else if (strcasecmp(name, "AXP0-VBUS-ENABLE") == 0) {
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sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d",
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SUNXI_GPIO_AXP0_VBUS_ENABLE);
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name = lookup;
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}
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#endif
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ret = gpio_lookup_name(name, NULL, NULL, &gpio);
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return ret ? ret : gpio;
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}
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static int sunxi_gpio_direction_input(struct udevice *dev, unsigned offset)
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{
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struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
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sunxi_gpio_set_cfgbank(plat->regs, offset, SUNXI_GPIO_INPUT);
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return 0;
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}
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static int sunxi_gpio_direction_output(struct udevice *dev, unsigned offset,
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int value)
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{
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struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
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u32 num = GPIO_NUM(offset);
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sunxi_gpio_set_cfgbank(plat->regs, offset, SUNXI_GPIO_OUTPUT);
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clrsetbits_le32(&plat->regs->dat, 1 << num, value ? (1 << num) : 0);
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return 0;
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}
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static int sunxi_gpio_get_value(struct udevice *dev, unsigned offset)
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{
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struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
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u32 num = GPIO_NUM(offset);
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unsigned dat;
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dat = readl(&plat->regs->dat);
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dat >>= num;
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return dat & 0x1;
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}
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static int sunxi_gpio_set_value(struct udevice *dev, unsigned offset,
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int value)
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{
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struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
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u32 num = GPIO_NUM(offset);
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clrsetbits_le32(&plat->regs->dat, 1 << num, value ? (1 << num) : 0);
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return 0;
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}
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static int sunxi_gpio_get_function(struct udevice *dev, unsigned offset)
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{
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struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
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int func;
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func = sunxi_gpio_get_cfgbank(plat->regs, offset);
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if (func == SUNXI_GPIO_OUTPUT)
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return GPIOF_OUTPUT;
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else if (func == SUNXI_GPIO_INPUT)
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return GPIOF_INPUT;
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else
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return GPIOF_FUNC;
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}
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static int sunxi_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
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struct ofnode_phandle_args *args)
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{
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int ret;
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ret = device_get_child(dev, args->args[0], &desc->dev);
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if (ret)
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return ret;
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desc->offset = args->args[1];
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desc->flags = args->args[2] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0;
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return 0;
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}
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static const struct dm_gpio_ops gpio_sunxi_ops = {
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.direction_input = sunxi_gpio_direction_input,
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.direction_output = sunxi_gpio_direction_output,
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.get_value = sunxi_gpio_get_value,
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.set_value = sunxi_gpio_set_value,
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.get_function = sunxi_gpio_get_function,
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.xlate = sunxi_gpio_xlate,
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};
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/**
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* Returns the name of a GPIO bank
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*
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* GPIO banks are named A, B, C, ...
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*
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* @bank: Bank number (0, 1..n-1)
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* @return allocated string containing the name
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*/
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static char *gpio_bank_name(int bank)
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{
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char *name;
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name = malloc(3);
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if (name) {
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name[0] = 'P';
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name[1] = 'A' + bank;
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name[2] = '\0';
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}
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return name;
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}
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static int gpio_sunxi_probe(struct udevice *dev)
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{
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struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
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struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
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/* Tell the uclass how many GPIOs we have */
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if (plat) {
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uc_priv->gpio_count = plat->gpio_count;
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uc_priv->bank_name = plat->bank_name;
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}
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return 0;
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}
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struct sunxi_gpio_soc_data {
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int start;
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int no_banks;
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};
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/**
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* We have a top-level GPIO device with no actual GPIOs. It has a child
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* device for each Sunxi bank.
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*/
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static int gpio_sunxi_bind(struct udevice *parent)
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{
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struct sunxi_gpio_soc_data *soc_data =
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(struct sunxi_gpio_soc_data *)dev_get_driver_data(parent);
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struct sunxi_gpio_platdata *plat = parent->platdata;
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struct sunxi_gpio_reg *ctlr;
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int bank, ret;
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/* If this is a child device, there is nothing to do here */
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if (plat)
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return 0;
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ctlr = (struct sunxi_gpio_reg *)devfdt_get_addr(parent);
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for (bank = 0; bank < soc_data->no_banks; bank++) {
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struct sunxi_gpio_platdata *plat;
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struct udevice *dev;
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plat = calloc(1, sizeof(*plat));
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if (!plat)
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return -ENOMEM;
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plat->regs = &ctlr->gpio_bank[bank];
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plat->bank_name = gpio_bank_name(soc_data->start + bank);
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plat->gpio_count = SUNXI_GPIOS_PER_BANK;
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ret = device_bind(parent, parent->driver,
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plat->bank_name, plat, -1, &dev);
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if (ret)
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return ret;
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dev_set_of_offset(dev, dev_of_offset(parent));
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}
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return 0;
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}
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static const struct sunxi_gpio_soc_data soc_data_a_all = {
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.start = 0,
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.no_banks = SUNXI_GPIO_BANKS,
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};
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static const struct sunxi_gpio_soc_data soc_data_l_1 = {
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.start = 'L' - 'A',
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.no_banks = 1,
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};
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static const struct sunxi_gpio_soc_data soc_data_l_2 = {
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.start = 'L' - 'A',
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.no_banks = 2,
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};
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static const struct sunxi_gpio_soc_data soc_data_l_3 = {
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.start = 'L' - 'A',
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.no_banks = 3,
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};
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#define ID(_compat_, _soc_data_) \
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{ .compatible = _compat_, .data = (ulong)&soc_data_##_soc_data_ }
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static const struct udevice_id sunxi_gpio_ids[] = {
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ID("allwinner,sun4i-a10-pinctrl", a_all),
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ID("allwinner,sun5i-a10s-pinctrl", a_all),
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ID("allwinner,sun5i-a13-pinctrl", a_all),
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ID("allwinner,sun50i-h5-pinctrl", a_all),
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ID("allwinner,sun6i-a31-pinctrl", a_all),
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ID("allwinner,sun6i-a31s-pinctrl", a_all),
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ID("allwinner,sun7i-a20-pinctrl", a_all),
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ID("allwinner,sun8i-a23-pinctrl", a_all),
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ID("allwinner,sun8i-a33-pinctrl", a_all),
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ID("allwinner,sun8i-a83t-pinctrl", a_all),
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ID("allwinner,sun8i-h3-pinctrl", a_all),
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ID("allwinner,sun8i-r40-pinctrl", a_all),
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ID("allwinner,sun8i-v3s-pinctrl", a_all),
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ID("allwinner,sun9i-a80-pinctrl", a_all),
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ID("allwinner,sun50i-a64-pinctrl", a_all),
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ID("allwinner,sun6i-a31-r-pinctrl", l_2),
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ID("allwinner,sun8i-a23-r-pinctrl", l_1),
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ID("allwinner,sun8i-a83t-r-pinctrl", l_1),
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ID("allwinner,sun8i-h3-r-pinctrl", l_1),
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ID("allwinner,sun9i-a80-r-pinctrl", l_3),
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ID("allwinner,sun50i-a64-r-pinctrl", l_1),
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{ }
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};
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U_BOOT_DRIVER(gpio_sunxi) = {
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.name = "gpio_sunxi",
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.id = UCLASS_GPIO,
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.ops = &gpio_sunxi_ops,
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.of_match = sunxi_gpio_ids,
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.bind = gpio_sunxi_bind,
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.probe = gpio_sunxi_probe,
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};
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#endif
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