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path: root/drivers/tty/serial/8250/8250_ni.c
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Diffstat (limited to 'drivers/tty/serial/8250/8250_ni.c')
-rw-r--r--drivers/tty/serial/8250/8250_ni.c133
1 files changed, 61 insertions, 72 deletions
diff --git a/drivers/tty/serial/8250/8250_ni.c b/drivers/tty/serial/8250/8250_ni.c
index b10a42d2ad63..cb5b42b3609c 100644
--- a/drivers/tty/serial/8250/8250_ni.c
+++ b/drivers/tty/serial/8250/8250_ni.c
@@ -10,14 +10,18 @@
* Copyright 2012-2023 National Instruments Corporation
*/
-#include <linux/acpi.h>
#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/clk.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/init.h>
+#include <linux/mod_devicetable.h>
#include <linux/module.h>
+#include <linux/platform_device.h>
#include <linux/property.h>
-#include <linux/clk.h>
+#include <linux/serial_core.h>
+#include <linux/types.h>
#include "8250.h"
@@ -90,10 +94,10 @@ static int ni16550_disable_transceivers(struct uart_port *port)
{
u8 pcr;
- pcr = port->serial_in(port, NI16550_PCR_OFFSET);
+ pcr = serial_port_in(port, NI16550_PCR_OFFSET);
pcr &= ~NI16550_PCR_TXVR_ENABLE_BIT;
dev_dbg(port->dev, "disable transceivers: write pcr: 0x%02x\n", pcr);
- port->serial_out(port, NI16550_PCR_OFFSET, pcr);
+ serial_port_out(port, NI16550_PCR_OFFSET, pcr);
return 0;
}
@@ -105,7 +109,7 @@ static int ni16550_rs485_config(struct uart_port *port,
struct uart_8250_port *up = container_of(port, struct uart_8250_port, port);
u8 pcr;
- pcr = serial_in(up, NI16550_PCR_OFFSET);
+ pcr = serial_port_in(port, NI16550_PCR_OFFSET);
pcr &= ~NI16550_PCR_WIRE_MODE_MASK;
if ((rs485->flags & SER_RS485_MODE_RS422) ||
@@ -120,7 +124,7 @@ static int ni16550_rs485_config(struct uart_port *port,
}
dev_dbg(port->dev, "config rs485: write pcr: 0x%02x, acr: %02x\n", pcr, up->acr);
- serial_out(up, NI16550_PCR_OFFSET, pcr);
+ serial_port_out(port, NI16550_PCR_OFFSET, pcr);
serial_icr_write(up, UART_ACR, up->acr);
return 0;
@@ -224,31 +228,26 @@ static int ni16550_get_regs(struct platform_device *pdev,
{
struct resource *regs;
- regs = platform_get_resource(pdev, IORESOURCE_IO, 0);
- if (regs) {
+ regs = platform_get_mem_or_io(pdev, 0);
+ if (!regs)
+ return dev_err_probe(&pdev->dev, -EINVAL, "no registers defined\n");
+
+ switch (resource_type(regs)) {
+ case IORESOURCE_IO:
port->iotype = UPIO_PORT;
port->iobase = regs->start;
return 0;
- }
-
- regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (regs) {
+ case IORESOURCE_MEM:
port->iotype = UPIO_MEM;
port->mapbase = regs->start;
port->mapsize = resource_size(regs);
port->flags |= UPF_IOREMAP;
- port->membase = devm_ioremap(&pdev->dev, port->mapbase,
- port->mapsize);
- if (!port->membase)
- return -ENOMEM;
-
return 0;
+ default:
+ return -EINVAL;
}
-
- dev_err(&pdev->dev, "no registers defined\n");
- return -EINVAL;
}
/*
@@ -276,86 +275,80 @@ static void ni16550_set_mctrl(struct uart_port *port, unsigned int mctrl)
static int ni16550_probe(struct platform_device *pdev)
{
+ struct uart_8250_port *uart __free(kfree) = NULL;
const struct ni16550_device_info *info;
struct device *dev = &pdev->dev;
- struct uart_8250_port uart = {};
unsigned int txfifosz, rxfifosz;
- unsigned int prescaler = 0;
struct ni16550_data *data;
+ unsigned int prescaler;
const char *portmode;
bool rs232_property;
int ret;
- int irq;
+
+ uart = kzalloc(sizeof(*uart), GFP_KERNEL);
+ if (!uart)
+ return -ENOMEM;
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
- spin_lock_init(&uart.port.lock);
+ spin_lock_init(&uart->port.lock);
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return irq;
-
- ret = ni16550_get_regs(pdev, &uart.port);
+ ret = ni16550_get_regs(pdev, &uart->port);
if (ret < 0)
return ret;
/* early setup so that serial_in()/serial_out() work */
- serial8250_set_defaults(&uart);
+ serial8250_set_defaults(uart);
info = device_get_match_data(dev);
- uart.port.dev = dev;
- uart.port.irq = irq;
- uart.port.irqflags = IRQF_SHARED;
- uart.port.flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF
- | UPF_FIXED_PORT | UPF_FIXED_TYPE;
- uart.port.startup = ni16550_port_startup;
- uart.port.shutdown = ni16550_port_shutdown;
+ uart->port.dev = dev;
+ uart->port.flags = UPF_BOOT_AUTOCONF | UPF_FIXED_PORT | UPF_FIXED_TYPE;
+ uart->port.startup = ni16550_port_startup;
+ uart->port.shutdown = ni16550_port_shutdown;
/*
* Hardware instantiation of FIFO sizes are held in registers.
*/
- txfifosz = ni16550_read_fifo_size(&uart, NI16550_TFS_OFFSET);
- rxfifosz = ni16550_read_fifo_size(&uart, NI16550_RFS_OFFSET);
+ txfifosz = ni16550_read_fifo_size(uart, NI16550_TFS_OFFSET);
+ rxfifosz = ni16550_read_fifo_size(uart, NI16550_RFS_OFFSET);
dev_dbg(dev, "NI 16550 has TX FIFO size %u, RX FIFO size %u\n",
txfifosz, rxfifosz);
- uart.port.type = PORT_16550A;
- uart.port.fifosize = txfifosz;
- uart.tx_loadsz = txfifosz;
- uart.fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10;
- uart.capabilities = UART_CAP_FIFO | UART_CAP_AFE | UART_CAP_EFR;
+ uart->port.type = PORT_16550A;
+ uart->port.fifosize = txfifosz;
+ uart->tx_loadsz = txfifosz;
+ uart->fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10;
+ uart->capabilities = UART_CAP_FIFO | UART_CAP_AFE | UART_CAP_EFR;
/*
* Declaration of the base clock frequency can come from one of:
* - static declaration in this driver (for older ACPI IDs)
- * - a "clock-frquency" ACPI
+ * - a "clock-frequency" ACPI
*/
- if (info->uartclk)
- uart.port.uartclk = info->uartclk;
- if (device_property_read_u32(dev, "clock-frequency",
- &uart.port.uartclk)) {
+ uart->port.uartclk = info->uartclk;
+
+ ret = uart_read_port_properties(&uart->port);
+ if (ret)
+ return ret;
+
+ if (!uart->port.uartclk) {
data->clk = devm_clk_get_enabled(dev, NULL);
if (!IS_ERR(data->clk))
- uart.port.uartclk = clk_get_rate(data->clk);
+ uart->port.uartclk = clk_get_rate(data->clk);
}
- if (!uart.port.uartclk) {
- dev_err(dev, "unable to determine clock frequency!\n");
- ret = -ENODEV;
- goto err;
- }
+ if (!uart->port.uartclk)
+ return dev_err_probe(dev, -ENODEV, "unable to determine clock frequency!\n");
- if (info->prescaler)
- prescaler = info->prescaler;
+ prescaler = info->prescaler;
device_property_read_u32(dev, "clock-prescaler", &prescaler);
-
- if (prescaler != 0) {
- uart.port.set_mctrl = ni16550_set_mctrl;
- ni16550_config_prescaler(&uart, (u8)prescaler);
+ if (prescaler) {
+ uart->port.set_mctrl = ni16550_set_mctrl;
+ ni16550_config_prescaler(uart, (u8)prescaler);
}
/*
@@ -373,7 +366,7 @@ static int ni16550_probe(struct platform_device *pdev)
dev_dbg(dev, "port is in %s mode (via device property)\n",
rs232_property ? "RS-232" : "RS-485");
} else if (info->flags & NI_HAS_PMR) {
- rs232_property = is_pmr_rs232_mode(&uart);
+ rs232_property = is_pmr_rs232_mode(uart);
dev_dbg(dev, "port is in %s mode (via PMR)\n",
rs232_property ? "RS-232" : "RS-485");
@@ -388,19 +381,16 @@ static int ni16550_probe(struct platform_device *pdev)
* Neither the 'transceiver' property nor the PMR indicate
* that this is an RS-232 port, so it must be an RS-485 one.
*/
- ni16550_rs485_setup(&uart.port);
+ ni16550_rs485_setup(&uart->port);
}
- ret = serial8250_register_8250_port(&uart);
+ ret = serial8250_register_8250_port(uart);
if (ret < 0)
- goto err;
+ return ret;
data->line = ret;
platform_set_drvdata(pdev, data);
return 0;
-
-err:
- return ret;
}
static void ni16550_remove(struct platform_device *pdev)
@@ -410,7 +400,6 @@ static void ni16550_remove(struct platform_device *pdev)
serial8250_unregister_port(data->line);
}
-#ifdef CONFIG_ACPI
/* NI 16550 RS-485 Interface */
static const struct ni16550_device_info nic7750 = {
.uartclk = 33333333,
@@ -435,20 +424,20 @@ static const struct ni16550_device_info nic7a69 = {
.uartclk = 29629629,
.prescaler = 0x09,
};
+
static const struct acpi_device_id ni16550_acpi_match[] = {
{ "NIC7750", (kernel_ulong_t)&nic7750 },
{ "NIC7772", (kernel_ulong_t)&nic7772 },
{ "NIC792B", (kernel_ulong_t)&nic792b },
{ "NIC7A69", (kernel_ulong_t)&nic7a69 },
- { },
+ { }
};
MODULE_DEVICE_TABLE(acpi, ni16550_acpi_match);
-#endif
static struct platform_driver ni16550_driver = {
.driver = {
.name = "ni16550",
- .acpi_match_table = ACPI_PTR(ni16550_acpi_match),
+ .acpi_match_table = ni16550_acpi_match,
},
.probe = ni16550_probe,
.remove = ni16550_remove,
generated by cgit v1.2.3 (git 2.39.0) at 2025-08-22 09:39:57 +0300