static int serial_omap_probe(struct platform_device *pdev)
{
struct omap_uart_port_info *omap_up_info = dev_get_platdata(&pdev->dev);
struct uart_omap_port *up;
struct resource *mem;
void __iomem *base;
int uartirq = 0;
int wakeirq = 0;
int ret;
/* The optional wakeirq may be specified in the board dts file */
if (pdev->dev.of_node) {
uartirq = irq_of_parse_and_map(pdev->dev.of_node, 0);
if (!uartirq)
return -EPROBE_DEFER;
wakeirq = irq_of_parse_and_map(pdev->dev.of_node, 1);
omap_up_info = of_get_uart_port_info(&pdev->dev);
pdev->dev.platform_data = omap_up_info;
} else {
uartirq = platform_get_irq(pdev, 0);
if (uartirq < 0)
return -EPROBE_DEFER;
}
up = devm_kzalloc(&pdev->dev, sizeof(*up), GFP_KERNEL);
if (!up)
return -ENOMEM;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, mem);
if (IS_ERR(base))
return PTR_ERR(base);
up->dev = &pdev->dev;
up->port.dev = &pdev->dev;
up->port.type = PORT_OMAP;
up->port.iotype = UPIO_MEM;
up->port.irq = uartirq;
up->port.regshift = 2;
up->port.fifosize = 64;
up->port.ops = &serial_omap_pops;
if (pdev->dev.of_node)
ret = of_alias_get_id(pdev->dev.of_node, "serial");
else
ret = pdev->id;
if (ret < 0) {
dev_err(&pdev->dev, "failed to get alias/pdev id, errno %d\n",
ret);
goto err_port_line;
}
up->port.line = ret;
if (up->port.line >= OMAP_MAX_HSUART_PORTS) {
dev_err(&pdev->dev, "uart ID %d > MAX %d.\n", up->port.line,
OMAP_MAX_HSUART_PORTS);
ret = -ENXIO;
goto err_port_line;
}
up->wakeirq = wakeirq;
if (!up->wakeirq)
dev_info(up->port.dev, "no wakeirq for uart%d\n",
up->port.line);
ret = serial_omap_probe_rs485(up, pdev->dev.of_node);
if (ret < 0)
goto err_rs485;
sprintf(up->name, "OMAP UART%d", up->port.line);
up->port.mapbase = mem->start;
up->port.membase = base;
up->port.flags = omap_up_info->flags;
up->port.uartclk = omap_up_info->uartclk;
up->port.rs485_config = serial_omap_config_rs485;
if (!up->port.uartclk) {
up->port.uartclk = DEFAULT_CLK_SPEED;
dev_warn(&pdev->dev,
"No clock speed specified: using default: %d\n",
DEFAULT_CLK_SPEED);
}
up->latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
up->calc_latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
pm_qos_add_request(&up->pm_qos_request,
PM_QOS_CPU_DMA_LATENCY, up->latency);
INIT_WORK(&up->qos_work, serial_omap_uart_qos_work);
platform_set_drvdata(pdev, up);
if (omap_up_info->autosuspend_timeout == 0)
omap_up_info->autosuspend_timeout = -1;
device_init_wakeup(up->dev, true);
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_set_autosuspend_delay(&pdev->dev,
omap_up_info->autosuspend_timeout);
pm_runtime_irq_safe(&pdev->dev);
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
omap_serial_fill_features_erratas(up);
ui[up->port.line] = up;
serial_omap_add_console_port(up);
ret = uart_add_one_port(&serial_omap_reg, &up->port);
if (ret != 0)
goto err_add_port;
pm_runtime_mark_last_busy(up->dev);
pm_runtime_put_autosuspend(up->dev);
return 0;
err_add_port:
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
pm_qos_remove_request(&up->pm_qos_request);
device_init_wakeup(up->dev, false);
err_rs485:
err_port_line:
return ret;
}
static int serial_omap_probe(struct platform_device *pdev)
{
struct uart_omap_port *up;
struct resource *mem, *irq, *dma_tx, *dma_rx;
struct omap_uart_port_info *omap_up_info = pdev->dev.platform_data;
int ret = -ENOSPC;
if (pdev->dev.of_node)
omap_up_info = of_get_uart_port_info(&pdev->dev);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem) {
dev_err(&pdev->dev, "no mem resource?\n");
return -ENODEV;
}
irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!irq) {
dev_err(&pdev->dev, "no irq resource?\n");
return -ENODEV;
}
if (!devm_request_mem_region(&pdev->dev, mem->start, resource_size(mem),
pdev->dev.driver->name)) {
dev_err(&pdev->dev, "memory region already claimed\n");
return -EBUSY;
}
dma_rx = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx");
if (!dma_rx)
return -ENXIO;
dma_tx = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx");
if (!dma_tx)
return -ENXIO;
up = devm_kzalloc(&pdev->dev, sizeof(*up), GFP_KERNEL);
if (!up)
return -ENOMEM;
up->pdev = pdev;
up->port.dev = &pdev->dev;
up->port.type = PORT_OMAP;
up->port.iotype = UPIO_MEM;
up->port.irq = irq->start;
up->port.regshift = 2;
up->port.fifosize = 64;
up->port.ops = &serial_omap_pops;
if (pdev->dev.of_node)
up->port.line = of_alias_get_id(pdev->dev.of_node, "serial");
else
up->port.line = pdev->id;
if (up->port.line < 0) {
dev_err(&pdev->dev, "failed to get alias/pdev id, errno %d\n",
up->port.line);
ret = -ENODEV;
goto err_port_line;
}
sprintf(up->name, "OMAP UART%d", up->port.line);
up->port.mapbase = mem->start;
up->port.membase = devm_ioremap(&pdev->dev, mem->start,
resource_size(mem));
if (!up->port.membase) {
dev_err(&pdev->dev, "can't ioremap UART\n");
ret = -ENOMEM;
goto err_ioremap;
}
up->port.flags = omap_up_info->flags;
up->port.uartclk = omap_up_info->uartclk;
if (!up->port.uartclk) {
up->port.uartclk = DEFAULT_CLK_SPEED;
dev_warn(&pdev->dev, "No clock speed specified: using default:"
"%d\n", DEFAULT_CLK_SPEED);
}
up->uart_dma.uart_base = mem->start;
if (omap_up_info->dma_enabled) {
up->uart_dma.uart_dma_tx = dma_tx->start;
up->uart_dma.uart_dma_rx = dma_rx->start;
up->use_dma = 1;
up->uart_dma.rx_buf_size = omap_up_info->dma_rx_buf_size;
up->uart_dma.rx_timeout = omap_up_info->dma_rx_timeout;
up->uart_dma.rx_poll_rate = omap_up_info->dma_rx_poll_rate;
spin_lock_init(&(up->uart_dma.tx_lock));
spin_lock_init(&(up->uart_dma.rx_lock));
up->uart_dma.tx_dma_channel = OMAP_UART_DMA_CH_FREE;
up->uart_dma.rx_dma_channel = OMAP_UART_DMA_CH_FREE;
}
up->latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
up->calc_latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
pm_qos_add_request(&up->pm_qos_request,
PM_QOS_CPU_DMA_LATENCY, up->latency);
serial_omap_uart_wq = create_singlethread_workqueue(up->name);
INIT_WORK(&up->qos_work, serial_omap_uart_qos_work);
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_set_autosuspend_delay(&pdev->dev,
omap_up_info->autosuspend_timeout);
pm_runtime_irq_safe(&pdev->dev);
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
omap_serial_fill_features_erratas(up);
ui[up->port.line] = up;
serial_omap_add_console_port(up);
ret = uart_add_one_port(&serial_omap_reg, &up->port);
if (ret != 0)
goto err_add_port;
pm_runtime_put(&pdev->dev);
platform_set_drvdata(pdev, up);
return 0;
err_add_port:
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
err_ioremap:
err_port_line:
dev_err(&pdev->dev, "[UART%d]: failure [%s]: %d\n",
pdev->id, __func__, ret);
return ret;
}
static int omap8250_probe(struct platform_device *pdev)
{
struct resource *regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
struct resource *irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
struct omap8250_priv *priv;
struct uart_8250_port up;
int ret;
void __iomem *membase;
if (!regs || !irq) {
dev_err(&pdev->dev, "missing registers or irq\n");
return -EINVAL;
}
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
membase = devm_ioremap_nocache(&pdev->dev, regs->start,
resource_size(regs));
if (!membase)
return -ENODEV;
memset(&up, 0, sizeof(up));
up.port.dev = &pdev->dev;
up.port.mapbase = regs->start;
up.port.membase = membase;
up.port.irq = irq->start;
/*
* It claims to be 16C750 compatible however it is a little different.
* It has EFR and has no FCR7_64byte bit. The AFE (which it claims to
* have) is enabled via EFR instead of MCR. The type is set here 8250
* just to get things going. UNKNOWN does not work for a few reasons and
* we don't need our own type since we don't use 8250's set_termios()
* or pm callback.
*/
up.port.type = PORT_8250;
up.port.iotype = UPIO_MEM;
up.port.flags = UPF_FIXED_PORT | UPF_FIXED_TYPE | UPF_SOFT_FLOW |
UPF_HARD_FLOW;
up.port.private_data = priv;
up.port.regshift = 2;
up.port.fifosize = 64;
up.tx_loadsz = 64;
up.capabilities = UART_CAP_FIFO;
#ifdef CONFIG_PM_RUNTIME
/*
* PM_RUNTIME is mostly transparent. However to do it right we need to a
* TX empty interrupt before we can put the device to auto idle. So if
* PM_RUNTIME is not enabled we don't add that flag and can spare that
* one extra interrupt in the TX path.
*/
up.capabilities |= UART_CAP_RPM;
#endif
up.port.set_termios = omap_8250_set_termios;
up.port.pm = omap_8250_pm;
up.port.startup = omap_8250_startup;
up.port.shutdown = omap_8250_shutdown;
up.port.throttle = omap_8250_throttle;
up.port.unthrottle = omap_8250_unthrottle;
if (pdev->dev.of_node) {
ret = of_alias_get_id(pdev->dev.of_node, "serial");
of_property_read_u32(pdev->dev.of_node, "clock-frequency",
&up.port.uartclk);
priv->wakeirq = irq_of_parse_and_map(pdev->dev.of_node, 1);
} else {
ret = pdev->id;
}
if (ret < 0) {
dev_err(&pdev->dev, "failed to get alias/pdev id\n");
return ret;
}
up.port.line = ret;
if (!up.port.uartclk) {
up.port.uartclk = DEFAULT_CLK_SPEED;
dev_warn(&pdev->dev,
"No clock speed specified: using default: %d\n",
DEFAULT_CLK_SPEED);
}
priv->latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
priv->calc_latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
pm_qos_add_request(&priv->pm_qos_request, PM_QOS_CPU_DMA_LATENCY,
priv->latency);
INIT_WORK(&priv->qos_work, omap8250_uart_qos_work);
device_init_wakeup(&pdev->dev, true);
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_set_autosuspend_delay(&pdev->dev, -1);
pm_runtime_irq_safe(&pdev->dev);
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
omap_serial_fill_features_erratas(&up, priv);
#ifdef CONFIG_SERIAL_8250_DMA
if (pdev->dev.of_node) {
/*
* Oh DMA support. If there are no DMA properties in the DT then
* we will fall back to a generic DMA channel which does not
* really work here. To ensure that we do not get a generic DMA
* channel assigned, we have the the_no_dma_filter_fn() here.
* To avoid "failed to request DMA" messages we check for DMA
* properties in DT.
*/
ret = of_property_count_strings(pdev->dev.of_node, "dma-names");
if (ret == 2) {
up.dma = &priv->omap8250_dma;
up.port.handle_irq = omap_8250_dma_handle_irq;
priv->omap8250_dma.fn = the_no_dma_filter_fn;
priv->omap8250_dma.tx_dma = omap_8250_tx_dma;
priv->omap8250_dma.rx_dma = omap_8250_rx_dma;
priv->omap8250_dma.rx_size = RX_TRIGGER;
priv->omap8250_dma.rxconf.src_maxburst = RX_TRIGGER;
priv->omap8250_dma.txconf.dst_maxburst = TX_TRIGGER;
if (of_machine_is_compatible("ti,am33xx"))
priv->habit |= OMAP_DMA_TX_KICK;
}
}
#endif
ret = serial8250_register_8250_port(&up);
if (ret < 0) {
dev_err(&pdev->dev, "unable to register 8250 port\n");
goto err;
}
priv->line = ret;
platform_set_drvdata(pdev, priv);
pm_runtime_mark_last_busy(&pdev->dev);
pm_runtime_put_autosuspend(&pdev->dev);
return 0;
err:
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
return ret;
}
static int uart_omap_probe(struct platform_device *pdev)
{
printk("omap_i2c_probe started\n");
struct uart_omap_port *up;
struct resource *mem,*irq;
struct omap_uart_port_info *omap_up_info=pdev->dev.platform_data;
int ret;
struct rtdm_device *rdev;
void __iomem *mem_1;
int retval;
if(pdev->dev.of_node)
omap_up_info = of_get_uart_port_info(&pdev->dev);
mem = platform_get_resource(pdev,IORESOURCE_MEM,0);
if(!mem)
{
dev_err(&pdev->dev,"no mem resource\n");
return -ENODEV;
}
printk("platform_get_resource for mem\n");
irq = platform_get_resource(pdev,IORESOURCE_IRQ,0);
if(!irq)
{
dev_err(&pdev->dev,"no irq resource\n");
return -ENODEV;
}
printk("platform_get_resource for irq\n");
if(!devm_request_mem_region(&pdev->dev,mem->start,resource_size(mem),pdev->dev.driver->name))
{
dev_err(&pdev->dev,"memory region already claimed\n");
return -EBUSY;
}
printk("mem->start=%x\n",mem->start);
printk("irq->start=%x\n",irq->start);
if ( gpio_is_valid(omap_up_info->DTR_gpio) && omap_up_info->DTR_present)
{
ret = gpio_request(omap_up_info->DTR_gpio, "omap-serial");
printk("gpio_request\n");
if (ret < 0)
return ret;
ret = gpio_direction_output(omap_up_info->DTR_gpio,omap_up_info->DTR_inverted);
printk("gpio_direction_output\n");
if (ret < 0)
return ret;
}
printk("gpio_is_valid\n");
up = devm_kzalloc(&pdev->dev, sizeof(*up), GFP_KERNEL);
if (!up)
return -ENOMEM;
printk("Local struct up=%x\n",up);
rtdm_printk("clock enabling.......UART4\n");
mem_1 = ioremap(SOC_PRCM_REGS, SOC_PRCM_SIZE);
if(!mem)
{
printk (KERN_ERR "HI: ERROR: Failed to remap memory for GPIO Bank 2 IRQ pin configuration.\n");
return 0;
}
// retval=ioread32(mem_1 + 0x78);
// rtdm_printk("value of clock i2c enable retval=%d\n",retval);
iowrite32(CM_PER_UART4_CLKCTRL , mem_1 + 0x78);
// retval = ioread32(CM_PER_UART4_CLKCTRL + 0x78);
// rtdm_printk("value of clock i2c enable retval=%d\n",retval);
rtdm_printk("clock enable for UART4\n");
rdev=kzalloc(sizeof(struct rtdm_device),GFP_KERNEL);
rdev = &up->rtdm_dev;
memcpy(rdev, &uart_device, sizeof(struct rtdm_device));
ret=rtdm_dev_register(rdev);
if(ret<0)
{
printk("RTDM device not registered\n");
}
rdev->device_data = devm_kzalloc(&pdev->dev, sizeof(MY_DEV), GFP_KERNEL);
rdev->device_data = up;
printk("RTDM driver register\n");
if (gpio_is_valid(omap_up_info->DTR_gpio) && omap_up_info->DTR_present)
{
up->DTR_gpio = omap_up_info->DTR_gpio;
up->DTR_inverted = omap_up_info->DTR_inverted;
printk("DTR gpio valid\n");
}
else
up->DTR_gpio = -EINVAL;
up->DTR_active = 0;
up->dev = &pdev->dev;
up->irq = irq->start;
up->regshift = 2;
up->fifosize = 64;
if (pdev->dev.of_node)
{
up->line = of_alias_get_id(pdev->dev.of_node, "serial");
printk("pdev->dev.of_node\n");
}
else
{
up->line = pdev->id;
printk("pdev->id\n");
}
if (up->line < 0)
{
dev_err(&pdev->dev, "failed to get alias/pdev id, errno %d\n",up->line);
ret = -ENODEV;
// goto err_port_line;
}
up->pins = devm_pinctrl_get_select_default(&pdev->dev);
if (IS_ERR(up->pins))
{
dev_warn(&pdev->dev, "did not get pins for uart%i error: %li\n",up->line, PTR_ERR(up->pins));
up->pins = NULL;
}
printk("devm_pinctrl_get_select_default\n");
sprintf(up->name, "OMAP UART%d", up->line);
up->mapbase = mem->start;
up->membase = devm_ioremap(&pdev->dev,mem->start,resource_size(mem));//what does ioremap do???? read about it
if (!up->membase)
{
dev_err(&pdev->dev, "can't ioremap UART\n");
ret = -ENOMEM;
// goto err_ioremap;
}
up->flags = omap_up_info->flags;
up->uartclk = omap_up_info->uartclk;
printk("clock freq=%d\n",up->uartclk);
if(!up->uartclk)
{
up->uartclk = DEFAULT_CLK_SPEED;
dev_warn(&pdev->dev, "No clock speed specified: using default:""%d\n", DEFAULT_CLK_SPEED);
}
up->latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
up->calc_latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
platform_set_drvdata(pdev, up);
omap_serial_fill_features_erratas(up);
return 0;
//err_unuse_clocks:
// omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, 0);
//err_free_mem:
// platform_set_drvdata(pdev, NULL);
// return r;
}
static int __devinit serial_omap_probe(struct platform_device *pdev)
{
struct uart_omap_port *up;
struct resource *mem, *irq;
struct omap_uart_port_info *omap_up_info = pdev->dev.platform_data;
int ret;
if (pdev->dev.of_node)
omap_up_info = of_get_uart_port_info(&pdev->dev);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem) {
dev_err(&pdev->dev, "no mem resource?\n");
return -ENODEV;
}
irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!irq) {
dev_err(&pdev->dev, "no irq resource?\n");
return -ENODEV;
}
if (!devm_request_mem_region(&pdev->dev, mem->start, resource_size(mem),
pdev->dev.driver->name)) {
dev_err(&pdev->dev, "memory region already claimed\n");
return -EBUSY;
}
if (gpio_is_valid(omap_up_info->DTR_gpio) &&
omap_up_info->DTR_present) {
ret = gpio_request(omap_up_info->DTR_gpio, "omap-serial");
if (ret < 0)
return ret;
ret = gpio_direction_output(omap_up_info->DTR_gpio,
omap_up_info->DTR_inverted);
if (ret < 0)
return ret;
}
up = devm_kzalloc(&pdev->dev, sizeof(*up), GFP_KERNEL);
if (!up)
return -ENOMEM;
if (gpio_is_valid(omap_up_info->DTR_gpio) &&
omap_up_info->DTR_present) {
up->DTR_gpio = omap_up_info->DTR_gpio;
up->DTR_inverted = omap_up_info->DTR_inverted;
} else
up->DTR_gpio = -EINVAL;
up->DTR_active = 0;
up->dev = &pdev->dev;
up->port.dev = &pdev->dev;
up->port.type = PORT_OMAP;
up->port.iotype = UPIO_MEM;
up->port.irq = irq->start;
up->port.regshift = 2;
up->port.fifosize = 64;
up->port.ops = &serial_omap_pops;
if (pdev->dev.of_node)
up->port.line = of_alias_get_id(pdev->dev.of_node, "serial");
else
up->port.line = pdev->id;
if (up->port.line < 0) {
dev_err(&pdev->dev, "failed to get alias/pdev id, errno %d\n",
up->port.line);
ret = -ENODEV;
goto err_port_line;
}
up->pins = devm_pinctrl_get_select_default(&pdev->dev);
if (IS_ERR(up->pins)) {
dev_warn(&pdev->dev, "did not get pins for uart%i error: %li\n",
up->port.line, PTR_ERR(up->pins));
up->pins = NULL;
}
sprintf(up->name, "OMAP UART%d", up->port.line);
up->port.mapbase = mem->start;
up->port.membase = devm_ioremap(&pdev->dev, mem->start,
resource_size(mem));
if (!up->port.membase) {
dev_err(&pdev->dev, "can't ioremap UART\n");
ret = -ENOMEM;
goto err_ioremap;
}
up->port.flags = omap_up_info->flags;
up->port.uartclk = omap_up_info->uartclk;
if (!up->port.uartclk) {
up->port.uartclk = DEFAULT_CLK_SPEED;
dev_warn(&pdev->dev, "No clock speed specified: using default:"
"%d\n", DEFAULT_CLK_SPEED);
}
up->latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
up->calc_latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
pm_qos_add_request(&up->pm_qos_request,
PM_QOS_CPU_DMA_LATENCY, up->latency);
serial_omap_uart_wq = create_singlethread_workqueue(up->name);
INIT_WORK(&up->qos_work, serial_omap_uart_qos_work);
platform_set_drvdata(pdev, up);
pm_runtime_enable(&pdev->dev);
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_set_autosuspend_delay(&pdev->dev,
omap_up_info->autosuspend_timeout);
pm_runtime_irq_safe(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
omap_serial_fill_features_erratas(up);
ui[up->port.line] = up;
serial_omap_add_console_port(up);
ret = uart_add_one_port(&serial_omap_reg, &up->port);
if (ret != 0)
goto err_add_port;
pm_runtime_mark_last_busy(up->dev);
pm_runtime_put_autosuspend(up->dev);
return 0;
err_add_port:
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
err_ioremap:
err_port_line:
dev_err(&pdev->dev, "[UART%d]: failure [%s]: %d\n",
pdev->id, __func__, ret);
return ret;
}