void reset_misc(void)
{
struct gpio_desc gpio = {};
int node;
node = fdt_node_offset_by_compatible(gd->fdt_blob, 0,
"samsung,emmc-reset");
if (node < 0)
return;
gpio_request_by_name_nodev(gd->fdt_blob, node, "reset-gpio", 0, &gpio,
GPIOD_IS_OUT);
if (dm_gpio_is_valid(&gpio)) {
/*
* Reset eMMC
*
* FIXME: Need to optimize delay time. Minimum 1usec pulse is
* required by 'JEDEC Standard No.84-A441' (eMMC)
* document but real delay time is expected to greater
* than 1usec.
*/
dm_gpio_set_value(&gpio, 0);
mdelay(10);
dm_gpio_set_value(&gpio, 1);
}
}
static int dw_mdio_reset(struct mii_dev *bus)
{
struct udevice *dev = bus->priv;
struct dw_eth_dev *priv = dev_get_priv(dev);
struct dw_eth_pdata *pdata = dev_get_platdata(dev);
int ret;
if (!dm_gpio_is_valid(&priv->reset_gpio))
return 0;
/* reset the phy */
ret = dm_gpio_set_value(&priv->reset_gpio, 0);
if (ret)
return ret;
udelay(pdata->reset_delays[0]);
ret = dm_gpio_set_value(&priv->reset_gpio, 1);
if (ret)
return ret;
udelay(pdata->reset_delays[1]);
ret = dm_gpio_set_value(&priv->reset_gpio, 0);
if (ret)
return ret;
udelay(pdata->reset_delays[2]);
return 0;
}
static u32 cpld_read(struct udevice *dev, u8 addr)
{
struct renesas_ulcb_sysreset_priv *priv = dev_get_priv(dev);
u32 data = 0;
int i;
for (i = 0; i < 8; i++) {
dm_gpio_set_value(&priv->mosi, !!(addr & 0x80)); /* MSB first */
dm_gpio_set_value(&priv->sck, 1);
addr <<= 1;
dm_gpio_set_value(&priv->sck, 0);
}
dm_gpio_set_value(&priv->mosi, 0); /* READ */
dm_gpio_set_value(&priv->sstbz, 0);
dm_gpio_set_value(&priv->sck, 1);
dm_gpio_set_value(&priv->sck, 0);
dm_gpio_set_value(&priv->sstbz, 1);
for (i = 0; i < 32; i++) {
dm_gpio_set_value(&priv->sck, 1);
data <<= 1;
data |= dm_gpio_get_value(&priv->miso); /* MSB first */
dm_gpio_set_value(&priv->sck, 0);
}
return data;
}
int board_late_init(void)
{
struct gpio_desc gpio = {};
int node;
node = fdt_node_offset_by_compatible(gd->fdt_blob, 0, "st,led1");
if (node < 0)
return -1;
gpio_request_by_name_nodev(offset_to_ofnode(node), "led-gpio", 0, &gpio,
GPIOD_IS_OUT);
if (dm_gpio_is_valid(&gpio)) {
dm_gpio_set_value(&gpio, 0);
mdelay(10);
dm_gpio_set_value(&gpio, 1);
}
/* read button 1*/
node = fdt_node_offset_by_compatible(gd->fdt_blob, 0, "st,button1");
if (node < 0)
return -1;
gpio_request_by_name_nodev(offset_to_ofnode(node), "button-gpio", 0,
&gpio, GPIOD_IS_IN);
if (dm_gpio_is_valid(&gpio)) {
if (dm_gpio_get_value(&gpio))
puts("usr button is at HIGH LEVEL\n");
else
puts("usr button is at LOW LEVEL\n");
}
return 0;
}
/**
* Handle the next stage of device init
*/
static int handle_stage(const void *blob, struct tegra_lcd_priv *priv)
{
debug("%s: stage %d\n", __func__, priv->stage);
/* do the things for this stage */
switch (priv->stage) {
case STAGE_START:
/*
* It is possible that the FDT has requested that the LCD be
* disabled. We currently don't support this. It would require
* changes to U-Boot LCD subsystem to have LCD support
* compiled in but not used. An easier option might be to
* still have a frame buffer, but leave the backlight off and
* remove all mention of lcd in the stdout environment
* variable.
*/
funcmux_select(PERIPH_ID_DISP1, FUNCMUX_DEFAULT);
break;
case STAGE_PANEL_VDD:
if (dm_gpio_is_valid(&priv->panel_vdd))
dm_gpio_set_value(&priv->panel_vdd, 1);
break;
case STAGE_LVDS:
if (dm_gpio_is_valid(&priv->lvds_shutdown))
dm_gpio_set_value(&priv->lvds_shutdown, 1);
break;
case STAGE_BACKLIGHT_VDD:
if (dm_gpio_is_valid(&priv->backlight_vdd))
dm_gpio_set_value(&priv->backlight_vdd, 1);
break;
case STAGE_PWM:
/* Enable PWM at 15/16 high, 32768 Hz with divider 1 */
pinmux_set_func(PMUX_PINGRP_GPU, PMUX_FUNC_PWM);
pinmux_tristate_disable(PMUX_PINGRP_GPU);
pwm_set_config(priv->pwm, priv->pwm_channel, 0xdf, 0xff);
pwm_set_enable(priv->pwm, priv->pwm_channel, true);
break;
case STAGE_BACKLIGHT_EN:
if (dm_gpio_is_valid(&priv->backlight_en))
dm_gpio_set_value(&priv->backlight_en, 1);
break;
case STAGE_DONE:
break;
}
/* set up timer for next stage */
priv->timer_next = timer_get_us();
if (priv->stage < FDT_LCD_TIMINGS)
priv->timer_next += priv->panel_timings[priv->stage] * 1000;
/* move to next stage */
priv->stage++;
return 0;
}
void __weak board_netphy_reset(void *dev)
{
struct pic32eth_dev *priv = dev;
if (!dm_gpio_is_valid(&priv->rst_gpio))
return;
/* phy reset */
dm_gpio_set_value(&priv->rst_gpio, 0);
udelay(300);
dm_gpio_set_value(&priv->rst_gpio, 1);
udelay(300);
}
int i2c_arbitrator_select(struct udevice *mux, struct udevice *bus,
uint channel)
{
struct i2c_arbitrator_priv *priv = dev_get_priv(mux);
unsigned start;
int ret;
debug("%s: %s\n", __func__, mux->name);
/* Start a round of trying to claim the bus */
start = get_timer(0);
do {
unsigned start_retry;
int waiting = 0;
/* Indicate that we want to claim the bus */
ret = dm_gpio_set_value(&priv->ap_claim, 1);
if (ret)
goto err;
udelay(priv->slew_delay_us);
/* Wait for the EC to release it */
start_retry = get_timer(0);
while (get_timer(start_retry) < priv->wait_retry_ms) {
ret = dm_gpio_get_value(&priv->ec_claim);
if (ret < 0) {
goto err;
} else if (!ret) {
/* We got it, so return */
return 0;
}
if (!waiting)
waiting = 1;
}
/* It didn't release, so give up, wait, and try again */
ret = dm_gpio_set_value(&priv->ap_claim, 0);
if (ret)
goto err;
mdelay(priv->wait_retry_ms);
} while (get_timer(start) < priv->wait_free_ms);
/* Give up, release our claim */
printf("I2C: Could not claim bus, timeout %lu\n", get_timer(start));
ret = -ETIMEDOUT;
ret = 0;
err:
return ret;
}
static int rockchip_dwmmc_pwrseq_set_power(struct udevice *dev, bool enable)
{
struct gpio_desc reset;
int ret;
ret = gpio_request_by_name(dev, "reset-gpios", 0, &reset, GPIOD_IS_OUT);
if (ret)
return ret;
dm_gpio_set_value(&reset, 1);
udelay(1);
dm_gpio_set_value(&reset, 0);
udelay(200);
return 0;
}
static int pwm_backlight_enable(struct udevice *dev)
{
struct pwm_backlight_priv *priv = dev_get_priv(dev);
struct dm_regulator_uclass_platdata *plat;
uint duty_cycle;
int ret;
if (priv->reg) {
plat = dev_get_uclass_platdata(priv->reg);
debug("%s: Enable '%s', regulator '%s'/'%s'\n", __func__,
dev->name, priv->reg->name, plat->name);
ret = regulator_set_enable(priv->reg, true);
if (ret) {
debug("%s: Cannot enable regulator for PWM '%s'\n",
__func__, dev->name);
return ret;
}
mdelay(120);
}
duty_cycle = priv->period_ns * (priv->default_level - priv->min_level) /
(priv->max_level - priv->min_level + 1);
ret = pwm_set_config(priv->pwm, priv->channel, priv->period_ns,
duty_cycle);
if (ret)
return ret;
ret = pwm_set_enable(priv->pwm, priv->channel, true);
if (ret)
return ret;
mdelay(10);
dm_gpio_set_value(&priv->enable, 1);
return 0;
}
/*
* EHCI-initialization
* Create the appropriate control structures to manage
* a new EHCI host controller.
*/
int ehci_hcd_init(int index, enum usb_init_type init,
struct ehci_hccr **hccr, struct ehci_hcor **hcor)
{
struct exynos_ehci *ctx = &exynos;
#ifdef CONFIG_OF_CONTROL
if (exynos_usb_parse_dt(gd->fdt_blob, ctx)) {
debug("Unable to parse device tree for ehci-exynos\n");
return -ENODEV;
}
#else
ctx->usb = (struct exynos_usb_phy *)samsung_get_base_usb_phy();
ctx->hcd = (struct ehci_hccr *)samsung_get_base_usb_ehci();
#endif
#ifdef CONFIG_OF_CONTROL
/* setup the Vbus gpio here */
if (dm_gpio_is_valid(&ctx->vbus_gpio))
dm_gpio_set_value(&ctx->vbus_gpio, 1);
#endif
setup_usb_phy(ctx->usb);
board_usb_init(index, init);
*hccr = ctx->hcd;
*hcor = (struct ehci_hcor *)((uint32_t) *hccr
+ HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
debug("Exynos5-ehci: init hccr %x and hcor %x hc_length %d\n",
(uint32_t)*hccr, (uint32_t)*hcor,
(uint32_t)HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
return 0;
}
static void spi_cs_deactivate(struct pic32_spi_priv *priv)
{
if (!dm_gpio_is_valid(&priv->cs_gpio))
return;
dm_gpio_set_value(&priv->cs_gpio, 0);
}
static int do_sdhci_init(struct sdhci_host *host)
{
int dev_id, flag, ret;
flag = host->bus_width == 8 ? PINMUX_FLAG_8BIT_MODE : PINMUX_FLAG_NONE;
dev_id = host->index + PERIPH_ID_SDMMC0;
ret = exynos_pinmux_config(dev_id, flag);
if (ret) {
printf("external SD not configured\n");
return ret;
}
if (dm_gpio_is_valid(&host->pwr_gpio)) {
dm_gpio_set_value(&host->pwr_gpio, 1);
ret = exynos_pinmux_config(dev_id, flag);
if (ret) {
debug("MMC not configured\n");
return ret;
}
}
if (dm_gpio_is_valid(&host->cd_gpio)) {
ret = dm_gpio_get_value(&host->cd_gpio);
if (ret) {
debug("no SD card detected (%d)\n", ret);
return -ENODEV;
}
}
return s5p_sdhci_core_init(host);
}
static int do_sdhci_init(struct sdhci_host *host)
{
int dev_id, flag;
int err = 0;
flag = host->bus_width == 8 ? PINMUX_FLAG_8BIT_MODE : PINMUX_FLAG_NONE;
dev_id = host->index + PERIPH_ID_SDMMC0;
if (dm_gpio_is_valid(&host->pwr_gpio)) {
dm_gpio_set_value(&host->pwr_gpio, 1);
err = exynos_pinmux_config(dev_id, flag);
if (err) {
debug("MMC not configured\n");
return err;
}
}
if (dm_gpio_is_valid(&host->cd_gpio)) {
if (dm_gpio_get_value(&host->cd_gpio))
return -ENODEV;
err = exynos_pinmux_config(dev_id, flag);
if (err) {
printf("external SD not configured\n");
return err;
}
}
return s5p_sdhci_core_init(host);
}
static int fixed_regulator_set_enable(struct udevice *dev, bool enable)
{
struct fixed_regulator_platdata *dev_pdata = dev_get_platdata(dev);
int ret;
debug("%s: dev='%s', enable=%d, delay=%d, has_gpio=%d\n", __func__,
dev->name, enable, dev_pdata->startup_delay_us,
dm_gpio_is_valid(&dev_pdata->gpio));
/* Enable GPIO is optional */
if (!dm_gpio_is_valid(&dev_pdata->gpio)) {
if (!enable)
return -ENOSYS;
return 0;
}
ret = dm_gpio_set_value(&dev_pdata->gpio, enable);
if (ret) {
pr_err("Can't set regulator : %s gpio to: %d\n", dev->name,
enable);
return ret;
}
if (enable && dev_pdata->startup_delay_us)
udelay(dev_pdata->startup_delay_us);
debug("%s: done\n", __func__);
return 0;
}
static int xhci_usb_probe(struct udevice *dev)
{
struct exynos_xhci_platdata *plat = dev_get_platdata(dev);
struct exynos_xhci *ctx = dev_get_priv(dev);
struct xhci_hcor *hcor;
int ret;
ctx->hcd = (struct xhci_hccr *)plat->hcd_base;
ctx->usb3_phy = (struct exynos_usb3_phy *)plat->phy_base;
ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET);
hcor = (struct xhci_hcor *)((uint32_t)ctx->hcd +
HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase)));
/* setup the Vbus gpio here */
if (dm_gpio_is_valid(&plat->vbus_gpio))
dm_gpio_set_value(&plat->vbus_gpio, 1);
ret = exynos_xhci_core_init(ctx);
if (ret) {
puts("XHCI: failed to initialize controller\n");
return -EINVAL;
}
return xhci_register(dev, ctx->hcd, hcor);
}
static int enable_sequence(struct udevice *dev, int seq)
{
struct pwm_backlight_priv *priv = dev_get_priv(dev);
int ret;
switch (seq) {
case 0:
if (priv->reg) {
__maybe_unused struct dm_regulator_uclass_platdata
*plat;
plat = dev_get_uclass_platdata(priv->reg);
log_debug("Enable '%s', regulator '%s'/'%s'\n",
dev->name, priv->reg->name, plat->name);
ret = regulator_set_enable(priv->reg, true);
if (ret) {
log_debug("Cannot enable regulator for PWM '%s'\n",
dev->name);
return log_ret(ret);
}
mdelay(120);
}
break;
case 1:
mdelay(10);
dm_gpio_set_value(&priv->enable, 1);
break;
}
return 0;
}
static int led_7seg_init(unsigned int segments)
{
int node;
int ret;
int i;
struct gpio_desc desc[8];
node = fdt_node_offset_by_compatible(gd->fdt_blob, 0,
"atl,of-led-7seg");
if (node < 0)
return -ENODEV;
ret = gpio_request_list_by_name_nodev(offset_to_ofnode(node),
"segment-gpios", desc,
ARRAY_SIZE(desc), GPIOD_IS_OUT);
if (ret < 0)
return ret;
for (i = 0; i < ARRAY_SIZE(desc); i++) {
ret = dm_gpio_set_value(&desc[i], !(segments & BIT(i)));
if (ret)
return ret;
}
return 0;
}
void board_pex_config(void)
{
#ifdef CONFIG_SPL_BUILD
uint k;
struct gpio_desc gpio = {};
if (!request_gpio_by_name(&gpio, "pca9698@22", 31, "fpga-program-gpio")) {
/* prepare FPGA reconfiguration */
dm_gpio_set_dir_flags(&gpio, GPIOD_IS_OUT);
dm_gpio_set_value(&gpio, 0);
/* give lunatic PCIe clock some time to stabilize */
mdelay(500);
/* start FPGA reconfiguration */
dm_gpio_set_dir_flags(&gpio, GPIOD_IS_IN);
}
/* wait for FPGA done */
if (!request_gpio_by_name(&gpio, "pca9698@22", 19, "fpga-done-gpio")) {
for (k = 0; k < 20; ++k) {
if (dm_gpio_get_value(&gpio)) {
printf("FPGA done after %u rounds\n", k);
break;
}
mdelay(100);
}
}
/* disable FPGA reset */
if (!request_gpio_by_name(&gpio, "gpio@18100", 6, "cpu-to-fpga-reset")) {
dm_gpio_set_dir_flags(&gpio, GPIOD_IS_OUT);
dm_gpio_set_value(&gpio, 1);
}
/* wait for FPGA ready */
if (!request_gpio_by_name(&gpio, "pca9698@22", 27, "fpga-ready-gpio")) {
for (k = 0; k < 2; ++k) {
if (!dm_gpio_get_value(&gpio))
break;
mdelay(100);
}
}
#endif
}
static int gpio_led_set_on(struct udevice *dev, int on)
{
struct led_gpio_priv *priv = dev_get_priv(dev);
if (!dm_gpio_is_valid(&priv->gpio))
return -EREMOTEIO;
return dm_gpio_set_value(&priv->gpio, on);
}
static void atmel_spi_cs_deactivate(struct udevice *dev)
{
struct udevice *bus = dev_get_parent(dev);
struct atmel_spi_priv *priv = dev_get_priv(bus);
struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
u32 cs = slave_plat->cs;
dm_gpio_set_value(&priv->cs_gpios[cs], 1);
}
static void i2c_gpio_sda_set(struct gpio_desc *sda, int bit)
{
if (bit) {
dm_gpio_set_dir_flags(sda, GPIOD_IS_IN);
} else {
dm_gpio_set_dir_flags(sda, GPIOD_IS_OUT);
dm_gpio_set_value(sda, 0);
}
}
int video_bridge_set_active(struct udevice *dev, bool active)
{
struct video_bridge_priv *uc_priv = dev_get_uclass_priv(dev);
int ret;
debug("%s: %d\n", __func__, active);
ret = dm_gpio_set_value(&uc_priv->sleep, !active);
if (ret)
return ret;
if (active) {
ret = dm_gpio_set_value(&uc_priv->reset, true);
if (ret)
return ret;
udelay(10);
ret = dm_gpio_set_value(&uc_priv->reset, false);
}
return ret;
}
/**
* gpio_set_value() - [COMPAT] Configure logical value on GPIO pin
* gpio: GPIO number
* value: Logical value to be set on the GPIO pin.
*
* This function implements the API that's compatible with current
* GPIO API used in U-Boot. The request is forwarded to particular
* GPIO driver. Returns 0 on success, negative value on error.
*/
int gpio_set_value(unsigned gpio, int value)
{
struct gpio_desc desc;
int ret;
ret = gpio_to_device(gpio, &desc);
if (ret)
return ret;
return dm_gpio_set_value(&desc, value);
}
static int simple_panel_enable_backlight(struct udevice *dev)
{
struct simple_panel_priv *priv = dev_get_priv(dev);
int ret;
dm_gpio_set_value(&priv->enable, 1);
ret = backlight_enable(priv->backlight);
if (ret)
return ret;
return 0;
}
int i2c_arbitrator_deselect(struct udevice *mux, struct udevice *bus,
uint channel)
{
struct i2c_arbitrator_priv *priv = dev_get_priv(mux);
int ret;
debug("%s: %s\n", __func__, mux->name);
ret = dm_gpio_set_value(&priv->ap_claim, 0);
udelay(priv->slew_delay_us);
return ret;
}
static int pwm_backlight_set_brightness(struct udevice *dev, int percent)
{
struct pwm_backlight_priv *priv = dev_get_priv(dev);
bool disable = false;
int level;
int ret;
if (!priv->enabled) {
ret = enable_sequence(dev, 0);
if (ret)
return log_ret(ret);
}
if (percent == BACKLIGHT_OFF) {
disable = true;
percent = 0;
}
if (percent == BACKLIGHT_DEFAULT) {
level = priv->default_level;
} else {
if (priv->levels) {
level = priv->levels[percent * (priv->num_levels - 1)
/ 100];
} else {
level = priv->min_level +
(priv->max_level - priv->min_level) *
percent / 100;
}
}
priv->cur_level = level;
ret = set_pwm(priv);
if (ret)
return log_ret(ret);
if (!priv->enabled) {
ret = enable_sequence(dev, 1);
if (ret)
return log_ret(ret);
priv->enabled = true;
}
if (disable) {
dm_gpio_set_value(&priv->enable, 0);
if (priv->reg) {
ret = regulator_set_enable(priv->reg, false);
if (ret)
return log_ret(ret);
}
priv->enabled = false;
}
return 0;
}
static int do_mmc_init(int dev_index, bool removable)
{
struct mmc_host *host;
struct mmc *mmc;
/* DT should have been read & host config filled in */
host = &mmc_host[dev_index];
if (!host->enabled)
return -1;
debug(" do_mmc_init: index %d, bus width %d pwr_gpio %d cd_gpio %d\n",
dev_index, host->width, gpio_get_number(&host->pwr_gpio),
gpio_get_number(&host->cd_gpio));
host->clock = 0;
clock_start_periph_pll(host->mmc_id, CLOCK_ID_PERIPH, 20000000);
if (dm_gpio_is_valid(&host->pwr_gpio))
dm_gpio_set_value(&host->pwr_gpio, 1);
memset(&host->cfg, 0, sizeof(host->cfg));
host->cfg.name = "Tegra SD/MMC";
host->cfg.ops = &tegra_mmc_ops;
host->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
host->cfg.host_caps = 0;
if (host->width == 8)
host->cfg.host_caps |= MMC_MODE_8BIT;
if (host->width >= 4)
host->cfg.host_caps |= MMC_MODE_4BIT;
host->cfg.host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
/*
* min freq is for card identification, and is the highest
* low-speed SDIO card frequency (actually 400KHz)
* max freq is highest HS eMMC clock as per the SD/MMC spec
* (actually 52MHz)
*/
host->cfg.f_min = 375000;
host->cfg.f_max = 48000000;
host->cfg.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
mmc = mmc_create(&host->cfg, host);
mmc->block_dev.removable = removable;
if (mmc == NULL)
return -1;
return 0;
}
static void atmel_spi_cs_deactivate(struct udevice *dev)
{
#ifdef CONFIG_DM_GPIO
struct udevice *bus = dev_get_parent(dev);
struct atmel_spi_priv *priv = dev_get_priv(bus);
struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
u32 cs = slave_plat->cs;
if (!dm_gpio_is_valid(&priv->cs_gpios[cs]))
return;
dm_gpio_set_value(&priv->cs_gpios[cs], 1);
#endif
}
static int simple_panel_enable_backlight(struct udevice *dev)
{
struct simple_panel_priv *priv = dev_get_priv(dev);
int ret;
debug("%s: start, backlight = '%s'\n", __func__, priv->backlight->name);
dm_gpio_set_value(&priv->enable, 1);
ret = backlight_enable(priv->backlight);
debug("%s: done, ret = %d\n", __func__, ret);
if (ret)
return ret;
return 0;
}
static void rk3399_force_power_on_reset(void)
{
ofnode node;
struct gpio_desc sysreset_gpio;
debug("%s: trying to force a power-on reset\n", __func__);
node = ofnode_path("/config");
if (!ofnode_valid(node)) {
debug("%s: no /config node?\n", __func__);
return;
}
if (gpio_request_by_name_nodev(node, "sysreset-gpio", 0,
&sysreset_gpio, GPIOD_IS_OUT)) {
debug("%s: could not find a /config/sysreset-gpio\n", __func__);
return;
}
dm_gpio_set_value(&sysreset_gpio, 1);
}