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serial: 8250: Extract platform driver
Extract platform driver to a separate module for better maintenance and to reduce churn on 8250_core part changes when it's solely related to the former. No functional changes intended. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Sunil V L <sunilvl@ventanamicro.com> Tested-by: Sunil V L <sunilvl@ventanamicro.com> Link: https://lore.kernel.org/r/20240506140308.4040735-3-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko
Greg Kroah-Hartman
parent
c0e1aa60d6
commit
ffd8e8bd26
@ -9,7 +9,7 @@
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#include <linux/bits.h>
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#include <linux/serial_8250.h>
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#include <linux/serial_reg.h>
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#include <linux/serial_core.h>
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#include <linux/dmaengine.h>
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#include "../serial_mctrl_gpio.h"
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@ -93,6 +93,10 @@ struct serial8250_config {
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#define UART_BUG_THRE BIT(3) /* UART has buggy THRE reassertion */
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#define UART_BUG_TXRACE BIT(5) /* UART Tx fails to set remote DR */
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/* Module parameters */
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#define UART_NR CONFIG_SERIAL_8250_NR_UARTS
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extern unsigned int nr_uarts;
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#ifdef CONFIG_SERIAL_8250_SHARE_IRQ
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#define SERIAL8250_SHARE_IRQS 1
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@ -100,6 +104,9 @@ struct serial8250_config {
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#define SERIAL8250_SHARE_IRQS 0
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#endif
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extern unsigned int share_irqs;
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extern unsigned int skip_txen_test;
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#define SERIAL8250_PORT_FLAGS(_base, _irq, _flags) \
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{ \
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.iobase = _base, \
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@ -111,7 +118,19 @@ struct serial8250_config {
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#define SERIAL8250_PORT(_base, _irq) SERIAL8250_PORT_FLAGS(_base, _irq, 0)
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extern struct uart_driver serial8250_reg;
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void serial8250_register_ports(struct uart_driver *drv, struct device *dev);
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/* Legacy ISA bus related APIs */
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typedef void (*serial8250_isa_config_fn)(int, struct uart_port *, u32 *);
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extern serial8250_isa_config_fn serial8250_isa_config;
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void serial8250_isa_init_ports(void);
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extern struct platform_device *serial8250_isa_devs;
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extern const struct uart_ops *univ8250_port_base_ops;
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extern struct uart_ops univ8250_port_ops;
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static inline int serial_in(struct uart_8250_port *up, int offset)
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{
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@ -201,6 +220,7 @@ static inline bool serial8250_clear_THRI(struct uart_8250_port *up)
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return true;
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}
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struct uart_8250_port *serial8250_setup_port(int index);
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struct uart_8250_port *serial8250_get_port(int line);
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void serial8250_rpm_get(struct uart_8250_port *p);
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@ -6,11 +6,9 @@
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*
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* Copyright (C) 2001 Russell King.
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*
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* Supports: ISA-compatible 8250/16550 ports
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* PNP 8250/16550 ports
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* Supports:
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* early_serial_setup() ports
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* userspace-configurable "phantom" ports
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* "serial8250" platform devices
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* serial8250_register_8250_port() ports
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*/
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@ -36,47 +34,13 @@
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#include <linux/string_helpers.h>
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#include <linux/uaccess.h>
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#include <linux/io.h>
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#ifdef CONFIG_SPARC
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#include <linux/sunserialcore.h>
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#endif
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#include <asm/irq.h>
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#include "../serial_base.h" /* For serial_base_add_isa_preferred_console() */
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#include "8250.h"
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/*
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* Configuration:
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* share_irqs - whether we pass IRQF_SHARED to request_irq(). This option
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* is unsafe when used on edge-triggered interrupts.
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*/
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static unsigned int share_irqs = SERIAL8250_SHARE_IRQS;
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static unsigned int nr_uarts = CONFIG_SERIAL_8250_RUNTIME_UARTS;
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static struct uart_driver serial8250_reg;
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static unsigned int skip_txen_test; /* force skip of txen test at init time */
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#define PASS_LIMIT 512
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#include <asm/serial.h>
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/*
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* SERIAL_PORT_DFNS tells us about built-in ports that have no
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* standard enumeration mechanism. Platforms that can find all
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* serial ports via mechanisms like ACPI or PCI need not supply it.
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*/
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#ifndef SERIAL_PORT_DFNS
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#define SERIAL_PORT_DFNS
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#endif
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static const struct old_serial_port old_serial_port[] = {
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SERIAL_PORT_DFNS /* defined in asm/serial.h */
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};
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#define UART_NR CONFIG_SERIAL_8250_NR_UARTS
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struct irq_info {
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struct hlist_node node;
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int irq;
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@ -342,7 +306,7 @@ static void univ8250_release_irq(struct uart_8250_port *up)
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}
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const struct uart_ops *univ8250_port_base_ops = NULL;
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static struct uart_ops univ8250_port_ops;
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struct uart_ops univ8250_port_ops;
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static const struct uart_8250_ops univ8250_driver_ops = {
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.setup_irq = univ8250_setup_irq,
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@ -370,22 +334,12 @@ struct uart_8250_port *serial8250_get_port(int line)
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}
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EXPORT_SYMBOL_GPL(serial8250_get_port);
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static void (*serial8250_isa_config)(int port, struct uart_port *up,
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u32 *capabilities);
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void serial8250_set_isa_configurator(
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void (*v)(int port, struct uart_port *up, u32 *capabilities))
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{
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serial8250_isa_config = v;
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}
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EXPORT_SYMBOL(serial8250_set_isa_configurator);
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static inline void serial8250_apply_quirks(struct uart_8250_port *up)
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{
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up->port.quirks |= skip_txen_test ? UPQ_NO_TXEN_TEST : 0;
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}
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static struct uart_8250_port *serial8250_setup_port(int index)
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struct uart_8250_port *serial8250_setup_port(int index)
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{
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struct uart_8250_port *up;
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@ -410,59 +364,7 @@ static struct uart_8250_port *serial8250_setup_port(int index)
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return up;
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}
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static void __init serial8250_isa_init_ports(void)
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{
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struct uart_8250_port *up;
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static int first = 1;
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int i, irqflag = 0;
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if (!first)
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return;
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first = 0;
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if (nr_uarts > UART_NR)
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nr_uarts = UART_NR;
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/*
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* Set up initial isa ports based on nr_uart module param, or else
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* default to CONFIG_SERIAL_8250_RUNTIME_UARTS. Note that we do not
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* need to increase nr_uarts when setting up the initial isa ports.
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*/
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for (i = 0; i < nr_uarts; i++)
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serial8250_setup_port(i);
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/* chain base port ops to support Remote Supervisor Adapter */
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univ8250_port_ops = *univ8250_port_base_ops;
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univ8250_rsa_support(&univ8250_port_ops);
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if (share_irqs)
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irqflag = IRQF_SHARED;
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for (i = 0, up = serial8250_ports;
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i < ARRAY_SIZE(old_serial_port) && i < nr_uarts;
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i++, up++) {
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struct uart_port *port = &up->port;
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port->iobase = old_serial_port[i].port;
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port->irq = irq_canonicalize(old_serial_port[i].irq);
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port->irqflags = 0;
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port->uartclk = old_serial_port[i].baud_base * 16;
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port->flags = old_serial_port[i].flags;
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port->hub6 = 0;
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port->membase = old_serial_port[i].iomem_base;
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port->iotype = old_serial_port[i].io_type;
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port->regshift = old_serial_port[i].iomem_reg_shift;
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port->irqflags |= irqflag;
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if (serial8250_isa_config != NULL)
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serial8250_isa_config(i, &up->port, &up->capabilities);
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serial_base_add_isa_preferred_console(serial8250_reg.dev_name, i);
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}
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}
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static void __init
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serial8250_register_ports(struct uart_driver *drv, struct device *dev)
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void __init serial8250_register_ports(struct uart_driver *drv, struct device *dev)
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{
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int i;
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@ -619,7 +521,7 @@ console_initcall(univ8250_console_init);
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#define SERIAL8250_CONSOLE NULL
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#endif
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static struct uart_driver serial8250_reg = {
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struct uart_driver serial8250_reg = {
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.owner = THIS_MODULE,
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.driver_name = "serial",
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.dev_name = "ttyS",
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@ -720,120 +622,6 @@ void serial8250_resume_port(int line)
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}
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EXPORT_SYMBOL(serial8250_resume_port);
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/*
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* Register a set of serial devices attached to a platform device. The
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* list is terminated with a zero flags entry, which means we expect
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* all entries to have at least UPF_BOOT_AUTOCONF set.
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*/
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static int serial8250_probe(struct platform_device *dev)
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{
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struct plat_serial8250_port *p = dev_get_platdata(&dev->dev);
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struct uart_8250_port uart;
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int ret, i, irqflag = 0;
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memset(&uart, 0, sizeof(uart));
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if (share_irqs)
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irqflag = IRQF_SHARED;
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for (i = 0; p && p->flags != 0; p++, i++) {
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uart.port.iobase = p->iobase;
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uart.port.membase = p->membase;
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uart.port.irq = p->irq;
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uart.port.irqflags = p->irqflags;
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uart.port.uartclk = p->uartclk;
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uart.port.regshift = p->regshift;
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uart.port.iotype = p->iotype;
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uart.port.flags = p->flags;
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uart.port.mapbase = p->mapbase;
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uart.port.mapsize = p->mapsize;
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uart.port.hub6 = p->hub6;
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uart.port.has_sysrq = p->has_sysrq;
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uart.port.private_data = p->private_data;
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uart.port.type = p->type;
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uart.bugs = p->bugs;
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uart.port.serial_in = p->serial_in;
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uart.port.serial_out = p->serial_out;
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uart.dl_read = p->dl_read;
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uart.dl_write = p->dl_write;
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uart.port.handle_irq = p->handle_irq;
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uart.port.handle_break = p->handle_break;
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uart.port.set_termios = p->set_termios;
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uart.port.set_ldisc = p->set_ldisc;
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uart.port.get_mctrl = p->get_mctrl;
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uart.port.pm = p->pm;
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uart.port.dev = &dev->dev;
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uart.port.irqflags |= irqflag;
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ret = serial8250_register_8250_port(&uart);
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if (ret < 0) {
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dev_err(&dev->dev, "unable to register port at index %d "
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"(IO%lx MEM%llx IRQ%d): %d\n", i,
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p->iobase, (unsigned long long)p->mapbase,
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p->irq, ret);
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}
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}
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return 0;
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}
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/*
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* Remove serial ports registered against a platform device.
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*/
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static void serial8250_remove(struct platform_device *dev)
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{
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int i;
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for (i = 0; i < nr_uarts; i++) {
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struct uart_8250_port *up = &serial8250_ports[i];
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if (up->port.dev == &dev->dev)
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serial8250_unregister_port(i);
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}
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}
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static int serial8250_suspend(struct platform_device *dev, pm_message_t state)
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{
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int i;
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for (i = 0; i < UART_NR; i++) {
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struct uart_8250_port *up = &serial8250_ports[i];
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if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
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uart_suspend_port(&serial8250_reg, &up->port);
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}
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return 0;
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}
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static int serial8250_resume(struct platform_device *dev)
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{
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int i;
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for (i = 0; i < UART_NR; i++) {
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struct uart_8250_port *up = &serial8250_ports[i];
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if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
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serial8250_resume_port(i);
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}
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return 0;
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}
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static struct platform_driver serial8250_isa_driver = {
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.probe = serial8250_probe,
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.remove_new = serial8250_remove,
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.suspend = serial8250_suspend,
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.resume = serial8250_resume,
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.driver = {
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.name = "serial8250",
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},
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};
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/*
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* This "device" covers _all_ ISA 8250-compatible serial devices listed
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* in the table in include/asm/serial.h
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*/
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static struct platform_device *serial8250_isa_devs;
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/*
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* serial8250_register_8250_port and serial8250_unregister_port allows for
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* 16x50 serial ports to be configured at run-time, to support PCMCIA
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@ -1110,125 +898,5 @@ void serial8250_unregister_port(int line)
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}
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EXPORT_SYMBOL(serial8250_unregister_port);
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static int __init serial8250_init(void)
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{
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int ret;
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if (nr_uarts == 0)
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return -ENODEV;
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serial8250_isa_init_ports();
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pr_info("Serial: 8250/16550 driver, %d ports, IRQ sharing %s\n",
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nr_uarts, str_enabled_disabled(share_irqs));
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#ifdef CONFIG_SPARC
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ret = sunserial_register_minors(&serial8250_reg, UART_NR);
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#else
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serial8250_reg.nr = UART_NR;
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ret = uart_register_driver(&serial8250_reg);
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#endif
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if (ret)
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goto out;
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ret = serial8250_pnp_init();
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if (ret)
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goto unreg_uart_drv;
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serial8250_isa_devs = platform_device_alloc("serial8250",
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PLAT8250_DEV_LEGACY);
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if (!serial8250_isa_devs) {
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ret = -ENOMEM;
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goto unreg_pnp;
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}
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ret = platform_device_add(serial8250_isa_devs);
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if (ret)
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goto put_dev;
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serial8250_register_ports(&serial8250_reg, &serial8250_isa_devs->dev);
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ret = platform_driver_register(&serial8250_isa_driver);
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if (ret == 0)
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goto out;
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platform_device_del(serial8250_isa_devs);
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put_dev:
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platform_device_put(serial8250_isa_devs);
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unreg_pnp:
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serial8250_pnp_exit();
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unreg_uart_drv:
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#ifdef CONFIG_SPARC
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sunserial_unregister_minors(&serial8250_reg, UART_NR);
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#else
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uart_unregister_driver(&serial8250_reg);
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#endif
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out:
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return ret;
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}
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static void __exit serial8250_exit(void)
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{
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struct platform_device *isa_dev = serial8250_isa_devs;
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/*
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* This tells serial8250_unregister_port() not to re-register
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* the ports (thereby making serial8250_isa_driver permanently
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* in use.)
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*/
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serial8250_isa_devs = NULL;
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platform_driver_unregister(&serial8250_isa_driver);
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platform_device_unregister(isa_dev);
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serial8250_pnp_exit();
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#ifdef CONFIG_SPARC
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sunserial_unregister_minors(&serial8250_reg, UART_NR);
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#else
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uart_unregister_driver(&serial8250_reg);
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#endif
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}
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module_init(serial8250_init);
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module_exit(serial8250_exit);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Generic 8250/16x50 serial driver");
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module_param_hw(share_irqs, uint, other, 0644);
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MODULE_PARM_DESC(share_irqs, "Share IRQs with other non-8250/16x50 devices (unsafe)");
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module_param(nr_uarts, uint, 0644);
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MODULE_PARM_DESC(nr_uarts, "Maximum number of UARTs supported. (1-" __MODULE_STRING(CONFIG_SERIAL_8250_NR_UARTS) ")");
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module_param(skip_txen_test, uint, 0644);
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MODULE_PARM_DESC(skip_txen_test, "Skip checking for the TXEN bug at init time");
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MODULE_ALIAS_CHARDEV_MAJOR(TTY_MAJOR);
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#ifdef CONFIG_SERIAL_8250_DEPRECATED_OPTIONS
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#ifndef MODULE
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/* This module was renamed to 8250_core in 3.7. Keep the old "8250" name
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* working as well for the module options so we don't break people. We
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* need to keep the names identical and the convenient macros will happily
|
||||
* refuse to let us do that by failing the build with redefinition errors
|
||||
* of global variables. So we stick them inside a dummy function to avoid
|
||||
* those conflicts. The options still get parsed, and the redefined
|
||||
* MODULE_PARAM_PREFIX lets us keep the "8250." syntax alive.
|
||||
*
|
||||
* This is hacky. I'm sorry.
|
||||
*/
|
||||
static void __used s8250_options(void)
|
||||
{
|
||||
#undef MODULE_PARAM_PREFIX
|
||||
#define MODULE_PARAM_PREFIX "8250_core."
|
||||
|
||||
module_param_cb(share_irqs, ¶m_ops_uint, &share_irqs, 0644);
|
||||
module_param_cb(nr_uarts, ¶m_ops_uint, &nr_uarts, 0644);
|
||||
module_param_cb(skip_txen_test, ¶m_ops_uint, &skip_txen_test, 0644);
|
||||
}
|
||||
#else
|
||||
MODULE_ALIAS("8250_core");
|
||||
#endif
|
||||
#endif
|
||||
|
||||
339
drivers/tty/serial/8250/8250_platform.c
Normal file
339
drivers/tty/serial/8250/8250_platform.c
Normal file
@ -0,0 +1,339 @@
|
||||
// SPDX-License-Identifier: GPL-2.0+
|
||||
/*
|
||||
* Universal/legacy platform driver for 8250/16550-type serial ports
|
||||
*
|
||||
* Supports: ISA-compatible 8250/16550 ports
|
||||
* PNP 8250/16550 ports
|
||||
* "serial8250" platform devices
|
||||
*/
|
||||
#include <linux/array_size.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/moduleparam.h>
|
||||
#include <linux/platform_device.h>
|
||||
|
||||
#include <linux/serial_8250.h>
|
||||
|
||||
#ifdef CONFIG_SPARC
|
||||
#include <linux/sunserialcore.h>
|
||||
#endif
|
||||
|
||||
#include "../serial_base.h" /* For serial_base_add_isa_preferred_console() */
|
||||
#include "8250.h"
|
||||
|
||||
/*
|
||||
* Configuration:
|
||||
* share_irqs Whether we pass IRQF_SHARED to request_irq().
|
||||
* This option is unsafe when used on edge-triggered interrupts.
|
||||
* skip_txen_test Force skip of txen test at init time.
|
||||
*/
|
||||
unsigned int share_irqs = SERIAL8250_SHARE_IRQS;
|
||||
unsigned int skip_txen_test;
|
||||
|
||||
unsigned int nr_uarts = CONFIG_SERIAL_8250_RUNTIME_UARTS;
|
||||
|
||||
#include <asm/serial.h>
|
||||
|
||||
/*
|
||||
* SERIAL_PORT_DFNS tells us about built-in ports that have no
|
||||
* standard enumeration mechanism. Platforms that can find all
|
||||
* serial ports via mechanisms like ACPI or PCI need not supply it.
|
||||
*/
|
||||
#ifndef SERIAL_PORT_DFNS
|
||||
#define SERIAL_PORT_DFNS
|
||||
#endif
|
||||
|
||||
static const struct old_serial_port old_serial_port[] = {
|
||||
SERIAL_PORT_DFNS /* defined in asm/serial.h */
|
||||
};
|
||||
|
||||
serial8250_isa_config_fn serial8250_isa_config;
|
||||
void serial8250_set_isa_configurator(serial8250_isa_config_fn v)
|
||||
{
|
||||
serial8250_isa_config = v;
|
||||
}
|
||||
EXPORT_SYMBOL(serial8250_set_isa_configurator);
|
||||
|
||||
void __init serial8250_isa_init_ports(void)
|
||||
{
|
||||
static int first = 1;
|
||||
int i, irqflag = 0;
|
||||
|
||||
if (!first)
|
||||
return;
|
||||
first = 0;
|
||||
|
||||
if (nr_uarts > UART_NR)
|
||||
nr_uarts = UART_NR;
|
||||
|
||||
/*
|
||||
* Set up initial isa ports based on nr_uart module param, or else
|
||||
* default to CONFIG_SERIAL_8250_RUNTIME_UARTS. Note that we do not
|
||||
* need to increase nr_uarts when setting up the initial isa ports.
|
||||
*/
|
||||
for (i = 0; i < nr_uarts; i++)
|
||||
serial8250_setup_port(i);
|
||||
|
||||
/* chain base port ops to support Remote Supervisor Adapter */
|
||||
univ8250_port_ops = *univ8250_port_base_ops;
|
||||
univ8250_rsa_support(&univ8250_port_ops);
|
||||
|
||||
if (share_irqs)
|
||||
irqflag = IRQF_SHARED;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(old_serial_port) && i < nr_uarts; i++) {
|
||||
struct uart_8250_port *up = serial8250_get_port(i);
|
||||
struct uart_port *port = &up->port;
|
||||
|
||||
port->iobase = old_serial_port[i].port;
|
||||
port->irq = irq_canonicalize(old_serial_port[i].irq);
|
||||
port->irqflags = 0;
|
||||
port->uartclk = old_serial_port[i].baud_base * 16;
|
||||
port->flags = old_serial_port[i].flags;
|
||||
port->hub6 = 0;
|
||||
port->membase = old_serial_port[i].iomem_base;
|
||||
port->iotype = old_serial_port[i].io_type;
|
||||
port->regshift = old_serial_port[i].iomem_reg_shift;
|
||||
|
||||
port->irqflags |= irqflag;
|
||||
if (serial8250_isa_config != NULL)
|
||||
serial8250_isa_config(i, &up->port, &up->capabilities);
|
||||
|
||||
serial_base_add_isa_preferred_console(serial8250_reg.dev_name, i);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Register a set of serial devices attached to a platform device. The
|
||||
* list is terminated with a zero flags entry, which means we expect
|
||||
* all entries to have at least UPF_BOOT_AUTOCONF set.
|
||||
*/
|
||||
static int serial8250_probe(struct platform_device *dev)
|
||||
{
|
||||
struct plat_serial8250_port *p = dev_get_platdata(&dev->dev);
|
||||
struct uart_8250_port uart;
|
||||
int ret, i, irqflag = 0;
|
||||
|
||||
memset(&uart, 0, sizeof(uart));
|
||||
|
||||
if (share_irqs)
|
||||
irqflag = IRQF_SHARED;
|
||||
|
||||
for (i = 0; p && p->flags != 0; p++, i++) {
|
||||
uart.port.iobase = p->iobase;
|
||||
uart.port.membase = p->membase;
|
||||
uart.port.irq = p->irq;
|
||||
uart.port.irqflags = p->irqflags;
|
||||
uart.port.uartclk = p->uartclk;
|
||||
uart.port.regshift = p->regshift;
|
||||
uart.port.iotype = p->iotype;
|
||||
uart.port.flags = p->flags;
|
||||
uart.port.mapbase = p->mapbase;
|
||||
uart.port.mapsize = p->mapsize;
|
||||
uart.port.hub6 = p->hub6;
|
||||
uart.port.has_sysrq = p->has_sysrq;
|
||||
uart.port.private_data = p->private_data;
|
||||
uart.port.type = p->type;
|
||||
uart.bugs = p->bugs;
|
||||
uart.port.serial_in = p->serial_in;
|
||||
uart.port.serial_out = p->serial_out;
|
||||
uart.dl_read = p->dl_read;
|
||||
uart.dl_write = p->dl_write;
|
||||
uart.port.handle_irq = p->handle_irq;
|
||||
uart.port.handle_break = p->handle_break;
|
||||
uart.port.set_termios = p->set_termios;
|
||||
uart.port.set_ldisc = p->set_ldisc;
|
||||
uart.port.get_mctrl = p->get_mctrl;
|
||||
uart.port.pm = p->pm;
|
||||
uart.port.dev = &dev->dev;
|
||||
uart.port.irqflags |= irqflag;
|
||||
ret = serial8250_register_8250_port(&uart);
|
||||
if (ret < 0) {
|
||||
dev_err(&dev->dev, "unable to register port at index %d "
|
||||
"(IO%lx MEM%llx IRQ%d): %d\n", i,
|
||||
p->iobase, (unsigned long long)p->mapbase,
|
||||
p->irq, ret);
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Remove serial ports registered against a platform device.
|
||||
*/
|
||||
static void serial8250_remove(struct platform_device *dev)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < nr_uarts; i++) {
|
||||
struct uart_8250_port *up = serial8250_get_port(i);
|
||||
|
||||
if (up->port.dev == &dev->dev)
|
||||
serial8250_unregister_port(i);
|
||||
}
|
||||
}
|
||||
|
||||
static int serial8250_suspend(struct platform_device *dev, pm_message_t state)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < UART_NR; i++) {
|
||||
struct uart_8250_port *up = serial8250_get_port(i);
|
||||
|
||||
if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
|
||||
uart_suspend_port(&serial8250_reg, &up->port);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int serial8250_resume(struct platform_device *dev)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < UART_NR; i++) {
|
||||
struct uart_8250_port *up = serial8250_get_port(i);
|
||||
|
||||
if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
|
||||
serial8250_resume_port(i);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver serial8250_isa_driver = {
|
||||
.probe = serial8250_probe,
|
||||
.remove_new = serial8250_remove,
|
||||
.suspend = serial8250_suspend,
|
||||
.resume = serial8250_resume,
|
||||
.driver = {
|
||||
.name = "serial8250",
|
||||
},
|
||||
};
|
||||
|
||||
/*
|
||||
* This "device" covers _all_ ISA 8250-compatible serial devices listed
|
||||
* in the table in include/asm/serial.h
|
||||
*/
|
||||
struct platform_device *serial8250_isa_devs;
|
||||
|
||||
static int __init serial8250_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (nr_uarts == 0)
|
||||
return -ENODEV;
|
||||
|
||||
serial8250_isa_init_ports();
|
||||
|
||||
pr_info("Serial: 8250/16550 driver, %d ports, IRQ sharing %s\n",
|
||||
nr_uarts, str_enabled_disabled(share_irqs));
|
||||
|
||||
#ifdef CONFIG_SPARC
|
||||
ret = sunserial_register_minors(&serial8250_reg, UART_NR);
|
||||
#else
|
||||
serial8250_reg.nr = UART_NR;
|
||||
ret = uart_register_driver(&serial8250_reg);
|
||||
#endif
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
ret = serial8250_pnp_init();
|
||||
if (ret)
|
||||
goto unreg_uart_drv;
|
||||
|
||||
serial8250_isa_devs = platform_device_alloc("serial8250",
|
||||
PLAT8250_DEV_LEGACY);
|
||||
if (!serial8250_isa_devs) {
|
||||
ret = -ENOMEM;
|
||||
goto unreg_pnp;
|
||||
}
|
||||
|
||||
ret = platform_device_add(serial8250_isa_devs);
|
||||
if (ret)
|
||||
goto put_dev;
|
||||
|
||||
serial8250_register_ports(&serial8250_reg, &serial8250_isa_devs->dev);
|
||||
|
||||
ret = platform_driver_register(&serial8250_isa_driver);
|
||||
if (ret == 0)
|
||||
goto out;
|
||||
|
||||
platform_device_del(serial8250_isa_devs);
|
||||
put_dev:
|
||||
platform_device_put(serial8250_isa_devs);
|
||||
unreg_pnp:
|
||||
serial8250_pnp_exit();
|
||||
unreg_uart_drv:
|
||||
#ifdef CONFIG_SPARC
|
||||
sunserial_unregister_minors(&serial8250_reg, UART_NR);
|
||||
#else
|
||||
uart_unregister_driver(&serial8250_reg);
|
||||
#endif
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
module_init(serial8250_init);
|
||||
|
||||
static void __exit serial8250_exit(void)
|
||||
{
|
||||
struct platform_device *isa_dev = serial8250_isa_devs;
|
||||
|
||||
/*
|
||||
* This tells serial8250_unregister_port() not to re-register
|
||||
* the ports (thereby making serial8250_isa_driver permanently
|
||||
* in use.)
|
||||
*/
|
||||
serial8250_isa_devs = NULL;
|
||||
|
||||
platform_driver_unregister(&serial8250_isa_driver);
|
||||
platform_device_unregister(isa_dev);
|
||||
|
||||
serial8250_pnp_exit();
|
||||
|
||||
#ifdef CONFIG_SPARC
|
||||
sunserial_unregister_minors(&serial8250_reg, UART_NR);
|
||||
#else
|
||||
uart_unregister_driver(&serial8250_reg);
|
||||
#endif
|
||||
}
|
||||
module_exit(serial8250_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Generic 8250/16x50 serial platform driver");
|
||||
|
||||
module_param_hw(share_irqs, uint, other, 0644);
|
||||
MODULE_PARM_DESC(share_irqs, "Share IRQs with other non-8250/16x50 devices (unsafe)");
|
||||
|
||||
module_param(nr_uarts, uint, 0644);
|
||||
MODULE_PARM_DESC(nr_uarts, "Maximum number of UARTs supported. (1-" __MODULE_STRING(CONFIG_SERIAL_8250_NR_UARTS) ")");
|
||||
|
||||
module_param(skip_txen_test, uint, 0644);
|
||||
MODULE_PARM_DESC(skip_txen_test, "Skip checking for the TXEN bug at init time");
|
||||
|
||||
MODULE_ALIAS_CHARDEV_MAJOR(TTY_MAJOR);
|
||||
|
||||
#ifdef CONFIG_SERIAL_8250_DEPRECATED_OPTIONS
|
||||
#ifndef MODULE
|
||||
/* This module was renamed to 8250_core in 3.7. Keep the old "8250" name
|
||||
* working as well for the module options so we don't break people. We
|
||||
* need to keep the names identical and the convenient macros will happily
|
||||
* refuse to let us do that by failing the build with redefinition errors
|
||||
* of global variables. So we stick them inside a dummy function to avoid
|
||||
* those conflicts. The options still get parsed, and the redefined
|
||||
* MODULE_PARAM_PREFIX lets us keep the "8250." syntax alive.
|
||||
*
|
||||
* This is hacky. I'm sorry.
|
||||
*/
|
||||
static void __used s8250_options(void)
|
||||
{
|
||||
#undef MODULE_PARAM_PREFIX
|
||||
#define MODULE_PARAM_PREFIX "8250_core."
|
||||
|
||||
module_param_cb(share_irqs, ¶m_ops_uint, &share_irqs, 0644);
|
||||
module_param_cb(nr_uarts, ¶m_ops_uint, &nr_uarts, 0644);
|
||||
module_param_cb(skip_txen_test, ¶m_ops_uint, &skip_txen_test, 0644);
|
||||
}
|
||||
#else
|
||||
MODULE_ALIAS("8250_core");
|
||||
#endif
|
||||
#endif
|
||||
@ -3,10 +3,13 @@
|
||||
# Makefile for the 8250 serial device drivers.
|
||||
#
|
||||
|
||||
obj-$(CONFIG_SERIAL_8250) += 8250.o 8250_base.o
|
||||
obj-$(CONFIG_SERIAL_8250) += 8250.o
|
||||
8250-y := 8250_core.o
|
||||
8250-y += 8250_platform.o
|
||||
8250-$(CONFIG_SERIAL_8250_PNP) += 8250_pnp.o
|
||||
8250-$(CONFIG_SERIAL_8250_RSA) += 8250_rsa.o
|
||||
|
||||
obj-$(CONFIG_SERIAL_8250) += 8250_base.o
|
||||
8250_base-y := 8250_port.o
|
||||
8250_base-$(CONFIG_SERIAL_8250_DMA) += 8250_dma.o
|
||||
8250_base-$(CONFIG_SERIAL_8250_DWLIB) += 8250_dwlib.o
|
||||
|
||||
Loading…
Reference in New Issue
Block a user