83d290c56f
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>
263 lines
6.4 KiB
C
263 lines
6.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.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 <led.h>
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#include <asm/io.h>
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#include <dm/lists.h>
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#define LEDS_MAX 24
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/* LED Init register */
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#define LED_INIT_REG 0x00
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#define LED_INIT_FASTINTV_MS 20
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#define LED_INIT_FASTINTV_SHIFT 6
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#define LED_INIT_FASTINTV_MASK (0x3f << LED_INIT_FASTINTV_SHIFT)
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#define LED_INIT_SLEDEN_SHIFT 12
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#define LED_INIT_SLEDEN_MASK (1 << LED_INIT_SLEDEN_SHIFT)
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#define LED_INIT_SLEDMUX_SHIFT 13
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#define LED_INIT_SLEDMUX_MASK (1 << LED_INIT_SLEDMUX_SHIFT)
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#define LED_INIT_SLEDCLKNPOL_SHIFT 14
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#define LED_INIT_SLEDCLKNPOL_MASK (1 << LED_INIT_SLEDCLKNPOL_SHIFT)
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#define LED_INIT_SLEDDATAPPOL_SHIFT 15
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#define LED_INIT_SLEDDATANPOL_MASK (1 << LED_INIT_SLEDDATAPPOL_SHIFT)
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#define LED_INIT_SLEDSHIFTDIR_SHIFT 16
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#define LED_INIT_SLEDSHIFTDIR_MASK (1 << LED_INIT_SLEDSHIFTDIR_SHIFT)
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/* LED Mode registers */
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#define LED_MODE_REG_HI 0x04
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#define LED_MODE_REG_LO 0x08
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#define LED_MODE_ON 0
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#define LED_MODE_FAST 1
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#define LED_MODE_BLINK 2
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#define LED_MODE_OFF 3
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#define LED_MODE_MASK 0x3
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DECLARE_GLOBAL_DATA_PTR;
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struct bcm6328_led_priv {
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void __iomem *regs;
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void __iomem *mode;
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uint8_t shift;
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bool active_low;
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};
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static unsigned long bcm6328_led_get_mode(struct bcm6328_led_priv *priv)
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{
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return ((readl_be(priv->mode) >> priv->shift) & LED_MODE_MASK);
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}
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static int bcm6328_led_set_mode(struct bcm6328_led_priv *priv, uint8_t mode)
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{
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clrsetbits_be32(priv->mode, (LED_MODE_MASK << priv->shift),
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(mode << priv->shift));
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return 0;
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}
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static enum led_state_t bcm6328_led_get_state(struct udevice *dev)
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{
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struct bcm6328_led_priv *priv = dev_get_priv(dev);
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enum led_state_t state = LEDST_OFF;
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switch (bcm6328_led_get_mode(priv)) {
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#ifdef CONFIG_LED_BLINK
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case LED_MODE_BLINK:
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case LED_MODE_FAST:
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state = LEDST_BLINK;
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break;
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#endif
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case LED_MODE_OFF:
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state = (priv->active_low ? LEDST_ON : LEDST_OFF);
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break;
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case LED_MODE_ON:
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state = (priv->active_low ? LEDST_OFF : LEDST_ON);
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break;
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}
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return state;
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}
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static int bcm6328_led_set_state(struct udevice *dev, enum led_state_t state)
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{
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struct bcm6328_led_priv *priv = dev_get_priv(dev);
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unsigned long mode;
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switch (state) {
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#ifdef CONFIG_LED_BLINK
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case LEDST_BLINK:
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mode = LED_MODE_BLINK;
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break;
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#endif
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case LEDST_OFF:
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mode = (priv->active_low ? LED_MODE_ON : LED_MODE_OFF);
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break;
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case LEDST_ON:
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mode = (priv->active_low ? LED_MODE_OFF : LED_MODE_ON);
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break;
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case LEDST_TOGGLE:
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if (bcm6328_led_get_state(dev) == LEDST_OFF)
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return bcm6328_led_set_state(dev, LEDST_ON);
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else
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return bcm6328_led_set_state(dev, LEDST_OFF);
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break;
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default:
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return -ENOSYS;
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}
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return bcm6328_led_set_mode(priv, mode);
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}
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#ifdef CONFIG_LED_BLINK
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static unsigned long bcm6328_blink_delay(int delay)
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{
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unsigned long bcm6328_delay = delay;
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bcm6328_delay += (LED_INIT_FASTINTV_MS / 2);
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bcm6328_delay /= LED_INIT_FASTINTV_MS;
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bcm6328_delay <<= LED_INIT_FASTINTV_SHIFT;
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if (bcm6328_delay > LED_INIT_FASTINTV_MASK)
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return LED_INIT_FASTINTV_MASK;
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else
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return bcm6328_delay;
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}
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static int bcm6328_led_set_period(struct udevice *dev, int period_ms)
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{
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struct bcm6328_led_priv *priv = dev_get_priv(dev);
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clrsetbits_be32(priv->regs + LED_INIT_REG, LED_INIT_FASTINTV_MASK,
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bcm6328_blink_delay(period_ms));
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return 0;
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}
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#endif
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static const struct led_ops bcm6328_led_ops = {
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.get_state = bcm6328_led_get_state,
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.set_state = bcm6328_led_set_state,
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#ifdef CONFIG_LED_BLINK
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.set_period = bcm6328_led_set_period,
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#endif
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};
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static int bcm6328_led_probe(struct udevice *dev)
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{
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struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev);
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fdt_addr_t addr;
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fdt_size_t size;
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/* Top-level LED node */
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if (!uc_plat->label) {
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void __iomem *regs;
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u32 set_bits = 0;
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addr = devfdt_get_addr_size_index(dev, 0, &size);
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if (addr == FDT_ADDR_T_NONE)
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return -EINVAL;
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regs = ioremap(addr, size);
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if (fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
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"brcm,serial-leds"))
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set_bits |= LED_INIT_SLEDEN_MASK;
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if (fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
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"brcm,serial-mux"))
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set_bits |= LED_INIT_SLEDMUX_MASK;
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if (fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
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"brcm,serial-clk-low"))
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set_bits |= LED_INIT_SLEDCLKNPOL_MASK;
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if (!fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
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"brcm,serial-dat-low"))
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set_bits |= LED_INIT_SLEDDATANPOL_MASK;
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if (!fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
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"brcm,serial-shift-inv"))
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set_bits |= LED_INIT_SLEDSHIFTDIR_MASK;
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clrsetbits_be32(regs + LED_INIT_REG, ~0, set_bits);
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} else {
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struct bcm6328_led_priv *priv = dev_get_priv(dev);
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unsigned int pin;
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addr = devfdt_get_addr_size_index(dev_get_parent(dev), 0,
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&size);
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if (addr == FDT_ADDR_T_NONE)
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return -EINVAL;
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pin = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(dev), "reg",
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LEDS_MAX);
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if (pin >= LEDS_MAX)
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return -EINVAL;
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priv->regs = ioremap(addr, size);
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if (pin < 8) {
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/* LEDs 0-7 (bits 47:32) */
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priv->mode = priv->regs + LED_MODE_REG_HI;
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priv->shift = (pin << 1);
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} else {
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/* LEDs 8-23 (bits 31:0) */
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priv->mode = priv->regs + LED_MODE_REG_LO;
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priv->shift = ((pin - 8) << 1);
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}
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if (fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
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"active-low"))
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priv->active_low = true;
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}
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return 0;
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}
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static int bcm6328_led_bind(struct udevice *parent)
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{
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const void *blob = gd->fdt_blob;
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int node;
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for (node = fdt_first_subnode(blob, dev_of_offset(parent));
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node > 0;
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node = fdt_next_subnode(blob, node)) {
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struct led_uc_plat *uc_plat;
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struct udevice *dev;
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const char *label;
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int ret;
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label = fdt_getprop(blob, node, "label", NULL);
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if (!label) {
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debug("%s: node %s has no label\n", __func__,
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fdt_get_name(blob, node, NULL));
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return -EINVAL;
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}
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ret = device_bind_driver_to_node(parent, "bcm6328-led",
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fdt_get_name(blob, node, NULL),
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offset_to_ofnode(node), &dev);
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if (ret)
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return ret;
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uc_plat = dev_get_uclass_platdata(dev);
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uc_plat->label = label;
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}
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return 0;
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}
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static const struct udevice_id bcm6328_led_ids[] = {
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{ .compatible = "brcm,bcm6328-leds" },
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{ /* sentinel */ }
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};
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U_BOOT_DRIVER(bcm6328_led) = {
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.name = "bcm6328-led",
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.id = UCLASS_LED,
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.of_match = bcm6328_led_ids,
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.ops = &bcm6328_led_ops,
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.bind = bcm6328_led_bind,
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.probe = bcm6328_led_probe,
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.priv_auto_alloc_size = sizeof(struct bcm6328_led_priv),
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};
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