/**
* platform_get_irq - get an IRQ for a device
* @dev: platform device
* @num: IRQ number index
*/
int platform_get_irq(struct platform_device *dev, unsigned int num)
{
#ifdef CONFIG_SPARC
/* sparc does not have irqs represented as IORESOURCE_IRQ resources */
if (!dev || num >= dev->archdata.num_irqs)
return -ENXIO;
return dev->archdata.irqs[num];
#else
struct resource *r;
if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) {
int ret;
ret = of_irq_get(dev->dev.of_node, num);
if (ret > 0 || ret == -EPROBE_DEFER)
return ret;
}
r = platform_get_resource(dev, IORESOURCE_IRQ, num);
if (has_acpi_companion(&dev->dev)) {
if (r && r->flags & IORESOURCE_DISABLED) {
int ret;
ret = acpi_irq_get(ACPI_HANDLE(&dev->dev), num, r);
if (ret)
return ret;
}
}
/*
* The resources may pass trigger flags to the irqs that need
* to be set up. It so happens that the trigger flags for
* IORESOURCE_BITS correspond 1-to-1 to the IRQF_TRIGGER*
* settings.
*/
if (r && r->flags & IORESOURCE_BITS) {
struct irq_data *irqd;
irqd = irq_get_irq_data(r->start);
if (!irqd)
return -ENXIO;
irqd_set_trigger_type(irqd, r->flags & IORESOURCE_BITS);
}
if (r)
return r->start;
/*
* For the index 0 interrupt, allow falling back to GpioInt
* resources. While a device could have both Interrupt and GpioInt
* resources, making this fallback ambiguous, in many common cases
* the device will only expose one IRQ, and this fallback
* allows a common code path across either kind of resource.
*/
if (num == 0 && has_acpi_companion(&dev->dev))
return acpi_dev_gpio_irq_get(ACPI_COMPANION(&dev->dev), num);
return -ENXIO;
#endif
}
int platform_dma_configure(struct device *dev)
{
enum dev_dma_attr attr;
int ret = 0;
if (dev->of_node) {
ret = of_dma_configure(dev, dev->of_node, true);
} else if (has_acpi_companion(dev)) {
attr = acpi_get_dma_attr(to_acpi_device_node(dev->fwnode));
ret = acpi_dma_configure(dev, attr);
}
return ret;
}
static void dw8250_quirks(struct uart_port *p, struct dw8250_data *data)
{
if (p->dev->of_node) {
struct device_node *np = p->dev->of_node;
int id;
/* get index of serial line, if found in DT aliases */
id = of_alias_get_id(np, "serial");
if (id >= 0)
p->line = id;
#ifdef CONFIG_64BIT
if (of_device_is_compatible(np, "cavium,octeon-3860-uart")) {
p->serial_in = dw8250_serial_inq;
p->serial_out = dw8250_serial_outq;
p->flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_FIXED_TYPE;
p->type = PORT_OCTEON;
data->usr_reg = 0x27;
data->skip_autocfg = true;
}
#endif
if (of_device_is_big_endian(p->dev->of_node)) {
p->iotype = UPIO_MEM32BE;
p->serial_in = dw8250_serial_in32be;
p->serial_out = dw8250_serial_out32be;
}
} else if (has_acpi_companion(p->dev)) {
const struct acpi_device_id *id;
id = acpi_match_device(p->dev->driver->acpi_match_table,
p->dev);
if (id && !strcmp(id->id, "APMC0D08")) {
p->iotype = UPIO_MEM32;
p->regshift = 2;
p->serial_in = dw8250_serial_in32;
data->uart_16550_compatible = true;
}
p->set_termios = dw8250_set_termios;
}
/* Platforms with iDMA */
if (platform_get_resource_byname(to_platform_device(p->dev),
IORESOURCE_MEM, "lpss_priv")) {
p->set_termios = dw8250_set_termios;
data->dma.rx_param = p->dev->parent;
data->dma.tx_param = p->dev->parent;
data->dma.fn = dw8250_idma_filter;
}
}
static int qcom_rng_probe(struct platform_device *pdev)
{
struct resource *res;
struct qcom_rng *rng;
int ret;
rng = devm_kzalloc(&pdev->dev, sizeof(*rng), GFP_KERNEL);
if (!rng)
return -ENOMEM;
platform_set_drvdata(pdev, rng);
mutex_init(&rng->lock);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
rng->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(rng->base))
return PTR_ERR(rng->base);
/* ACPI systems have clk already on, so skip clk_get */
if (!has_acpi_companion(&pdev->dev)) {
rng->clk = devm_clk_get(&pdev->dev, "core");
if (IS_ERR(rng->clk))
return PTR_ERR(rng->clk);
}
rng->skip_init = (unsigned long)device_get_match_data(&pdev->dev);
qcom_rng_dev = rng;
ret = crypto_register_rng(&qcom_rng_alg);
if (ret) {
dev_err(&pdev->dev, "Register crypto rng failed: %d\n", ret);
qcom_rng_dev = NULL;
}
return ret;
}
static int dw_i2c_probe(struct platform_device *pdev)
{
struct dw_i2c_dev *dev;
struct i2c_adapter *adap;
struct resource *mem;
struct dw_i2c_platform_data *pdata;
int irq, r;
u32 clk_freq, ht = 0;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
dev = devm_kzalloc(&pdev->dev, sizeof(struct dw_i2c_dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
dev->base = devm_ioremap_resource(&pdev->dev, mem);
if (IS_ERR(dev->base))
return PTR_ERR(dev->base);
init_completion(&dev->cmd_complete);
mutex_init(&dev->lock);
dev->dev = &pdev->dev;
dev->irq = irq;
platform_set_drvdata(pdev, dev);
/* fast mode by default because of legacy reasons */
clk_freq = 400000;
if (has_acpi_companion(&pdev->dev)) {
dw_i2c_acpi_configure(pdev);
} else if (pdev->dev.of_node) {
of_property_read_u32(pdev->dev.of_node,
"i2c-sda-hold-time-ns", &ht);
of_property_read_u32(pdev->dev.of_node,
"i2c-sda-falling-time-ns",
&dev->sda_falling_time);
of_property_read_u32(pdev->dev.of_node,
"i2c-scl-falling-time-ns",
&dev->scl_falling_time);
of_property_read_u32(pdev->dev.of_node, "clock-frequency",
&clk_freq);
/* Only standard mode at 100kHz and fast mode at 400kHz
* are supported.
*/
if (clk_freq != 100000 && clk_freq != 400000) {
dev_err(&pdev->dev, "Only 100kHz and 400kHz supported");
return -EINVAL;
}
} else {
pdata = dev_get_platdata(&pdev->dev);
if (pdata)
clk_freq = pdata->i2c_scl_freq;
}
r = i2c_dw_eval_lock_support(dev);
if (r)
return r;
dev->functionality =
I2C_FUNC_I2C |
I2C_FUNC_10BIT_ADDR |
I2C_FUNC_SMBUS_BYTE |
I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA |
I2C_FUNC_SMBUS_I2C_BLOCK;
if (clk_freq == 100000)
dev->master_cfg = DW_IC_CON_MASTER | DW_IC_CON_SLAVE_DISABLE |
DW_IC_CON_RESTART_EN | DW_IC_CON_SPEED_STD;
else
dev->master_cfg = DW_IC_CON_MASTER | DW_IC_CON_SLAVE_DISABLE |
DW_IC_CON_RESTART_EN | DW_IC_CON_SPEED_FAST;
dev->clk = devm_clk_get(&pdev->dev, NULL);
dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz;
if (IS_ERR(dev->clk))
return PTR_ERR(dev->clk);
clk_prepare_enable(dev->clk);
if (!dev->sda_hold_time && ht) {
u32 ic_clk = dev->get_clk_rate_khz(dev);
dev->sda_hold_time = div_u64((u64)ic_clk * ht + 500000,
1000000);
}
if (!dev->tx_fifo_depth) {
u32 param1 = i2c_dw_read_comp_param(dev);
dev->tx_fifo_depth = ((param1 >> 16) & 0xff) + 1;
dev->rx_fifo_depth = ((param1 >> 8) & 0xff) + 1;
dev->adapter.nr = pdev->id;
}
static struct dma_chan *dw_dma_of_xlate(struct of_phandle_args *dma_spec,
struct of_dma *ofdma)
{
struct dw_dma *dw = ofdma->of_dma_data;
struct dw_dma_slave slave = {
.dma_dev = dw->dma.dev,
};
dma_cap_mask_t cap;
if (dma_spec->args_count != 3)
return NULL;
slave.src_id = dma_spec->args[0];
slave.dst_id = dma_spec->args[0];
slave.src_master = dma_spec->args[1];
slave.dst_master = dma_spec->args[2];
if (WARN_ON(slave.src_id >= DW_DMA_MAX_NR_REQUESTS ||
slave.dst_id >= DW_DMA_MAX_NR_REQUESTS ||
slave.src_master >= dw->nr_masters ||
slave.dst_master >= dw->nr_masters))
return NULL;
dma_cap_zero(cap);
dma_cap_set(DMA_SLAVE, cap);
/* TODO: there should be a simpler way to do this */
return dma_request_channel(cap, dw_dma_filter, &slave);
}
#ifdef CONFIG_ACPI
static bool dw_dma_acpi_filter(struct dma_chan *chan, void *param)
{
struct acpi_dma_spec *dma_spec = param;
struct dw_dma_slave slave = {
.dma_dev = dma_spec->dev,
.src_id = dma_spec->slave_id,
.dst_id = dma_spec->slave_id,
.src_master = 1,
.dst_master = 0,
};
return dw_dma_filter(chan, &slave);
}
static void dw_dma_acpi_controller_register(struct dw_dma *dw)
{
struct device *dev = dw->dma.dev;
struct acpi_dma_filter_info *info;
int ret;
info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
if (!info)
return;
dma_cap_zero(info->dma_cap);
dma_cap_set(DMA_SLAVE, info->dma_cap);
info->filter_fn = dw_dma_acpi_filter;
ret = devm_acpi_dma_controller_register(dev, acpi_dma_simple_xlate,
info);
if (ret)
dev_err(dev, "could not register acpi_dma_controller\n");
}
#else /* !CONFIG_ACPI */
static inline void dw_dma_acpi_controller_register(struct dw_dma *dw) {}
#endif /* !CONFIG_ACPI */
#ifdef CONFIG_OF
static struct dw_dma_platform_data *
dw_dma_parse_dt(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct dw_dma_platform_data *pdata;
u32 tmp, arr[DW_DMA_MAX_NR_MASTERS];
if (!np) {
dev_err(&pdev->dev, "Missing DT data\n");
return NULL;
}
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return NULL;
if (of_property_read_u32(np, "dma-channels", &pdata->nr_channels))
return NULL;
if (of_property_read_bool(np, "is_private"))
pdata->is_private = true;
if (!of_property_read_u32(np, "chan_allocation_order", &tmp))
pdata->chan_allocation_order = (unsigned char)tmp;
if (!of_property_read_u32(np, "chan_priority", &tmp))
pdata->chan_priority = tmp;
if (!of_property_read_u32(np, "block_size", &tmp))
pdata->block_size = tmp;
if (!of_property_read_u32(np, "dma-masters", &tmp)) {
if (tmp > DW_DMA_MAX_NR_MASTERS)
return NULL;
pdata->nr_masters = tmp;
}
if (!of_property_read_u32_array(np, "data_width", arr,
pdata->nr_masters))
for (tmp = 0; tmp < pdata->nr_masters; tmp++)
pdata->data_width[tmp] = arr[tmp];
return pdata;
}
#else
static inline struct dw_dma_platform_data *
dw_dma_parse_dt(struct platform_device *pdev)
{
return NULL;
}
#endif
static int dw_probe(struct platform_device *pdev)
{
struct dw_dma_chip *chip;
struct device *dev = &pdev->dev;
struct resource *mem;
const struct acpi_device_id *id;
struct dw_dma_platform_data *pdata;
int err;
chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->irq = platform_get_irq(pdev, 0);
if (chip->irq < 0)
return chip->irq;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
chip->regs = devm_ioremap_resource(dev, mem);
if (IS_ERR(chip->regs))
return PTR_ERR(chip->regs);
err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (err)
return err;
pdata = dev_get_platdata(dev);
if (!pdata)
pdata = dw_dma_parse_dt(pdev);
if (!pdata && has_acpi_companion(dev)) {
id = acpi_match_device(dev->driver->acpi_match_table, dev);
if (id)
pdata = (struct dw_dma_platform_data *)id->driver_data;
}
chip->dev = dev;
chip->clk = devm_clk_get(chip->dev, "hclk");
if (IS_ERR(chip->clk))
return PTR_ERR(chip->clk);
err = clk_prepare_enable(chip->clk);
if (err)
return err;
pm_runtime_enable(&pdev->dev);
err = dw_dma_probe(chip, pdata);
if (err)
goto err_dw_dma_probe;
platform_set_drvdata(pdev, chip);
if (pdev->dev.of_node) {
err = of_dma_controller_register(pdev->dev.of_node,
dw_dma_of_xlate, chip->dw);
if (err)
dev_err(&pdev->dev,
"could not register of_dma_controller\n");
}
if (ACPI_HANDLE(&pdev->dev))
dw_dma_acpi_controller_register(chip->dw);
return 0;
err_dw_dma_probe:
pm_runtime_disable(&pdev->dev);
clk_disable_unprepare(chip->clk);
return err;
}
static int dw_remove(struct platform_device *pdev)
{
struct dw_dma_chip *chip = platform_get_drvdata(pdev);
if (pdev->dev.of_node)
of_dma_controller_free(pdev->dev.of_node);
dw_dma_remove(chip);
pm_runtime_disable(&pdev->dev);
clk_disable_unprepare(chip->clk);
return 0;
}
static void dw_shutdown(struct platform_device *pdev)
{
struct dw_dma_chip *chip = platform_get_drvdata(pdev);
dw_dma_disable(chip);
clk_disable_unprepare(chip->clk);
}
#ifdef CONFIG_OF
static const struct of_device_id dw_dma_of_id_table[] = {
{ .compatible = "snps,dma-spear1340" },
{}
};
/* Configure the MDIO bus and connect the external PHY */
int emac_phy_config(struct platform_device *pdev, struct emac_adapter *adpt)
{
struct device_node *np = pdev->dev.of_node;
struct mii_bus *mii_bus;
int ret;
/* Create the mii_bus object for talking to the MDIO bus */
adpt->mii_bus = mii_bus = devm_mdiobus_alloc(&pdev->dev);
if (!mii_bus)
return -ENOMEM;
mii_bus->name = "emac-mdio";
snprintf(mii_bus->id, MII_BUS_ID_SIZE, "%s", pdev->name);
mii_bus->read = emac_mdio_read;
mii_bus->write = emac_mdio_write;
mii_bus->parent = &pdev->dev;
mii_bus->priv = adpt;
if (has_acpi_companion(&pdev->dev)) {
u32 phy_addr;
ret = mdiobus_register(mii_bus);
if (ret) {
dev_err(&pdev->dev, "could not register mdio bus\n");
return ret;
}
ret = device_property_read_u32(&pdev->dev, "phy-channel",
&phy_addr);
if (ret)
/* If we can't read a valid phy address, then assume
* that there is only one phy on this mdio bus.
*/
adpt->phydev = phy_find_first(mii_bus);
else
adpt->phydev = mdiobus_get_phy(mii_bus, phy_addr);
/* of_phy_find_device() claims a reference to the phydev,
* so we do that here manually as well. When the driver
* later unloads, it can unilaterally drop the reference
* without worrying about ACPI vs DT.
*/
if (adpt->phydev)
get_device(&adpt->phydev->mdio.dev);
} else {
struct device_node *phy_np;
ret = of_mdiobus_register(mii_bus, np);
if (ret) {
dev_err(&pdev->dev, "could not register mdio bus\n");
return ret;
}
phy_np = of_parse_phandle(np, "phy-handle", 0);
adpt->phydev = of_phy_find_device(phy_np);
of_node_put(phy_np);
}
if (!adpt->phydev) {
dev_err(&pdev->dev, "could not find external phy\n");
mdiobus_unregister(mii_bus);
return -ENODEV;
}
return 0;
}
