forked from Minki/linux
SERIAL: AR933X: Add driver for the built-in UART of the SoC
This patch adds the driver for the built-in UART of the Atheros AR933X SoCs. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Cc: linux-mips@linux-mips.org Cc: Kathy Giori <kgiori@qca.qualcomm.com> Cc: "Luis R. Rodriguez" <rodrigue@qca.qualcomm.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: linux-serial@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/2526/ Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Gabor Juhos
Ralf Baechle
parent
c279b77596
commit
d57f341ba0
18
arch/mips/include/asm/mach-ath79/ar933x_uart_platform.h
Normal file
18
arch/mips/include/asm/mach-ath79/ar933x_uart_platform.h
Normal file
@ -0,0 +1,18 @@
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/*
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* Platform data definition for Atheros AR933X UART
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*
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* Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*/
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#ifndef _AR933X_UART_PLATFORM_H
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#define _AR933X_UART_PLATFORM_H
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struct ar933x_uart_platform_data {
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unsigned uartclk;
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};
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#endif /* _AR933X_UART_PLATFORM_H */
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@ -1610,4 +1610,27 @@ config SERIAL_XILINX_PS_UART_CONSOLE
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help
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Enable a Xilinx PS UART port to be the system console.
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config SERIAL_AR933X
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bool "AR933X serial port support"
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depends on SOC_AR933X
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select SERIAL_CORE
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help
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If you have an Atheros AR933X SOC based board and want to use the
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built-in UART of the SoC, say Y to this option.
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config SERIAL_AR933X_CONSOLE
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bool "Console on AR933X serial port"
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depends on SERIAL_AR933X=y
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select SERIAL_CORE_CONSOLE
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help
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Enable a built-in UART port of the AR933X to be the system console.
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config SERIAL_AR933X_NR_UARTS
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int "Maximum number of AR933X serial ports"
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depends on SERIAL_AR933X
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default "2"
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help
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Set this to the number of serial ports you want the driver
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to support.
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endmenu
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@ -94,3 +94,4 @@ obj-$(CONFIG_SERIAL_MSM_SMD) += msm_smd_tty.o
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obj-$(CONFIG_SERIAL_MXS_AUART) += mxs-auart.o
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obj-$(CONFIG_SERIAL_LANTIQ) += lantiq.o
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obj-$(CONFIG_SERIAL_XILINX_PS_UART) += xilinx_uartps.o
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obj-$(CONFIG_SERIAL_AR933X) += ar933x_uart.o
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688
drivers/tty/serial/ar933x_uart.c
Normal file
688
drivers/tty/serial/ar933x_uart.c
Normal file
@ -0,0 +1,688 @@
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/*
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* Atheros AR933X SoC built-in UART driver
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*
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* Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
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*
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* Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/ioport.h>
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#include <linux/init.h>
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#include <linux/console.h>
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#include <linux/sysrq.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/serial_core.h>
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#include <linux/serial.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <asm/mach-ath79/ar933x_uart.h>
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#include <asm/mach-ath79/ar933x_uart_platform.h>
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#define DRIVER_NAME "ar933x-uart"
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#define AR933X_DUMMY_STATUS_RD 0x01
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static struct uart_driver ar933x_uart_driver;
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struct ar933x_uart_port {
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struct uart_port port;
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unsigned int ier; /* shadow Interrupt Enable Register */
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};
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static inline unsigned int ar933x_uart_read(struct ar933x_uart_port *up,
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int offset)
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{
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return readl(up->port.membase + offset);
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}
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static inline void ar933x_uart_write(struct ar933x_uart_port *up,
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int offset, unsigned int value)
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{
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writel(value, up->port.membase + offset);
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}
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static inline void ar933x_uart_rmw(struct ar933x_uart_port *up,
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unsigned int offset,
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unsigned int mask,
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unsigned int val)
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{
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unsigned int t;
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t = ar933x_uart_read(up, offset);
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t &= ~mask;
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t |= val;
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ar933x_uart_write(up, offset, t);
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}
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static inline void ar933x_uart_rmw_set(struct ar933x_uart_port *up,
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unsigned int offset,
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unsigned int val)
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{
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ar933x_uart_rmw(up, offset, 0, val);
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}
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static inline void ar933x_uart_rmw_clear(struct ar933x_uart_port *up,
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unsigned int offset,
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unsigned int val)
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{
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ar933x_uart_rmw(up, offset, val, 0);
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}
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static inline void ar933x_uart_start_tx_interrupt(struct ar933x_uart_port *up)
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{
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up->ier |= AR933X_UART_INT_TX_EMPTY;
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ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
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}
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static inline void ar933x_uart_stop_tx_interrupt(struct ar933x_uart_port *up)
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{
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up->ier &= ~AR933X_UART_INT_TX_EMPTY;
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ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
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}
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static inline void ar933x_uart_putc(struct ar933x_uart_port *up, int ch)
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{
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unsigned int rdata;
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rdata = ch & AR933X_UART_DATA_TX_RX_MASK;
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rdata |= AR933X_UART_DATA_TX_CSR;
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ar933x_uart_write(up, AR933X_UART_DATA_REG, rdata);
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}
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static unsigned int ar933x_uart_tx_empty(struct uart_port *port)
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{
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struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
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unsigned long flags;
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unsigned int rdata;
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spin_lock_irqsave(&up->port.lock, flags);
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rdata = ar933x_uart_read(up, AR933X_UART_DATA_REG);
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spin_unlock_irqrestore(&up->port.lock, flags);
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return (rdata & AR933X_UART_DATA_TX_CSR) ? 0 : TIOCSER_TEMT;
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}
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static unsigned int ar933x_uart_get_mctrl(struct uart_port *port)
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{
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return TIOCM_CAR;
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}
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static void ar933x_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
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{
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}
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static void ar933x_uart_start_tx(struct uart_port *port)
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{
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struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
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ar933x_uart_start_tx_interrupt(up);
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}
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static void ar933x_uart_stop_tx(struct uart_port *port)
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{
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struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
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ar933x_uart_stop_tx_interrupt(up);
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}
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static void ar933x_uart_stop_rx(struct uart_port *port)
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{
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struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
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up->ier &= ~AR933X_UART_INT_RX_VALID;
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ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
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}
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static void ar933x_uart_break_ctl(struct uart_port *port, int break_state)
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{
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struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
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unsigned long flags;
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spin_lock_irqsave(&up->port.lock, flags);
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if (break_state == -1)
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ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
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AR933X_UART_CS_TX_BREAK);
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else
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ar933x_uart_rmw_clear(up, AR933X_UART_CS_REG,
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AR933X_UART_CS_TX_BREAK);
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spin_unlock_irqrestore(&up->port.lock, flags);
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}
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static void ar933x_uart_enable_ms(struct uart_port *port)
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{
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}
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static void ar933x_uart_set_termios(struct uart_port *port,
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struct ktermios *new,
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struct ktermios *old)
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{
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struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
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unsigned int cs;
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unsigned long flags;
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unsigned int baud, scale;
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/* Only CS8 is supported */
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new->c_cflag &= ~CSIZE;
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new->c_cflag |= CS8;
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/* Only one stop bit is supported */
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new->c_cflag &= ~CSTOPB;
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cs = 0;
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if (new->c_cflag & PARENB) {
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if (!(new->c_cflag & PARODD))
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cs |= AR933X_UART_CS_PARITY_EVEN;
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else
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cs |= AR933X_UART_CS_PARITY_ODD;
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} else {
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cs |= AR933X_UART_CS_PARITY_NONE;
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}
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/* Mark/space parity is not supported */
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new->c_cflag &= ~CMSPAR;
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baud = uart_get_baud_rate(port, new, old, 0, port->uartclk / 16);
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scale = (port->uartclk / (16 * baud)) - 1;
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/*
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* Ok, we're now changing the port state. Do it with
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* interrupts disabled.
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*/
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spin_lock_irqsave(&up->port.lock, flags);
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/* Update the per-port timeout. */
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uart_update_timeout(port, new->c_cflag, baud);
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up->port.ignore_status_mask = 0;
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/* ignore all characters if CREAD is not set */
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if ((new->c_cflag & CREAD) == 0)
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up->port.ignore_status_mask |= AR933X_DUMMY_STATUS_RD;
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ar933x_uart_write(up, AR933X_UART_CLOCK_REG,
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scale << AR933X_UART_CLOCK_SCALE_S | 8192);
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/* setup configuration register */
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ar933x_uart_rmw(up, AR933X_UART_CS_REG, AR933X_UART_CS_PARITY_M, cs);
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/* enable host interrupt */
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ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
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AR933X_UART_CS_HOST_INT_EN);
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spin_unlock_irqrestore(&up->port.lock, flags);
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if (tty_termios_baud_rate(new))
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tty_termios_encode_baud_rate(new, baud, baud);
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}
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static void ar933x_uart_rx_chars(struct ar933x_uart_port *up)
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{
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struct tty_struct *tty;
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int max_count = 256;
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tty = tty_port_tty_get(&up->port.state->port);
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do {
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unsigned int rdata;
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unsigned char ch;
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rdata = ar933x_uart_read(up, AR933X_UART_DATA_REG);
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if ((rdata & AR933X_UART_DATA_RX_CSR) == 0)
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break;
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/* remove the character from the FIFO */
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ar933x_uart_write(up, AR933X_UART_DATA_REG,
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AR933X_UART_DATA_RX_CSR);
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if (!tty) {
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/* discard the data if no tty available */
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continue;
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}
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up->port.icount.rx++;
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ch = rdata & AR933X_UART_DATA_TX_RX_MASK;
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if (uart_handle_sysrq_char(&up->port, ch))
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continue;
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if ((up->port.ignore_status_mask & AR933X_DUMMY_STATUS_RD) == 0)
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tty_insert_flip_char(tty, ch, TTY_NORMAL);
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} while (max_count-- > 0);
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if (tty) {
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tty_flip_buffer_push(tty);
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tty_kref_put(tty);
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}
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}
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static void ar933x_uart_tx_chars(struct ar933x_uart_port *up)
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{
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struct circ_buf *xmit = &up->port.state->xmit;
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int count;
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if (uart_tx_stopped(&up->port))
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return;
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count = up->port.fifosize;
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do {
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unsigned int rdata;
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rdata = ar933x_uart_read(up, AR933X_UART_DATA_REG);
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if ((rdata & AR933X_UART_DATA_TX_CSR) == 0)
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break;
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if (up->port.x_char) {
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ar933x_uart_putc(up, up->port.x_char);
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up->port.icount.tx++;
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up->port.x_char = 0;
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continue;
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}
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if (uart_circ_empty(xmit))
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break;
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ar933x_uart_putc(up, xmit->buf[xmit->tail]);
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xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
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up->port.icount.tx++;
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} while (--count > 0);
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if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
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uart_write_wakeup(&up->port);
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if (!uart_circ_empty(xmit))
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ar933x_uart_start_tx_interrupt(up);
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}
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static irqreturn_t ar933x_uart_interrupt(int irq, void *dev_id)
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{
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struct ar933x_uart_port *up = dev_id;
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unsigned int status;
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status = ar933x_uart_read(up, AR933X_UART_CS_REG);
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if ((status & AR933X_UART_CS_HOST_INT) == 0)
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return IRQ_NONE;
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spin_lock(&up->port.lock);
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status = ar933x_uart_read(up, AR933X_UART_INT_REG);
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status &= ar933x_uart_read(up, AR933X_UART_INT_EN_REG);
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if (status & AR933X_UART_INT_RX_VALID) {
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ar933x_uart_write(up, AR933X_UART_INT_REG,
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AR933X_UART_INT_RX_VALID);
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ar933x_uart_rx_chars(up);
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}
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if (status & AR933X_UART_INT_TX_EMPTY) {
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ar933x_uart_write(up, AR933X_UART_INT_REG,
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AR933X_UART_INT_TX_EMPTY);
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ar933x_uart_stop_tx_interrupt(up);
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ar933x_uart_tx_chars(up);
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}
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spin_unlock(&up->port.lock);
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return IRQ_HANDLED;
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}
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static int ar933x_uart_startup(struct uart_port *port)
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{
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struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
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unsigned long flags;
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int ret;
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ret = request_irq(up->port.irq, ar933x_uart_interrupt,
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up->port.irqflags, dev_name(up->port.dev), up);
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if (ret)
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return ret;
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spin_lock_irqsave(&up->port.lock, flags);
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/* Enable HOST interrupts */
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ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
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AR933X_UART_CS_HOST_INT_EN);
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/* Enable RX interrupts */
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up->ier = AR933X_UART_INT_RX_VALID;
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ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
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spin_unlock_irqrestore(&up->port.lock, flags);
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return 0;
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}
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static void ar933x_uart_shutdown(struct uart_port *port)
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{
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struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
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/* Disable all interrupts */
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up->ier = 0;
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ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
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/* Disable break condition */
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ar933x_uart_rmw_clear(up, AR933X_UART_CS_REG,
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AR933X_UART_CS_TX_BREAK);
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free_irq(up->port.irq, up);
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}
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static const char *ar933x_uart_type(struct uart_port *port)
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{
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return (port->type == PORT_AR933X) ? "AR933X UART" : NULL;
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}
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static void ar933x_uart_release_port(struct uart_port *port)
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{
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/* Nothing to release ... */
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||||
}
|
||||
|
||||
static int ar933x_uart_request_port(struct uart_port *port)
|
||||
{
|
||||
/* UARTs always present */
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void ar933x_uart_config_port(struct uart_port *port, int flags)
|
||||
{
|
||||
if (flags & UART_CONFIG_TYPE)
|
||||
port->type = PORT_AR933X;
|
||||
}
|
||||
|
||||
static int ar933x_uart_verify_port(struct uart_port *port,
|
||||
struct serial_struct *ser)
|
||||
{
|
||||
if (ser->type != PORT_UNKNOWN &&
|
||||
ser->type != PORT_AR933X)
|
||||
return -EINVAL;
|
||||
|
||||
if (ser->irq < 0 || ser->irq >= NR_IRQS)
|
||||
return -EINVAL;
|
||||
|
||||
if (ser->baud_base < 28800)
|
||||
return -EINVAL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct uart_ops ar933x_uart_ops = {
|
||||
.tx_empty = ar933x_uart_tx_empty,
|
||||
.set_mctrl = ar933x_uart_set_mctrl,
|
||||
.get_mctrl = ar933x_uart_get_mctrl,
|
||||
.stop_tx = ar933x_uart_stop_tx,
|
||||
.start_tx = ar933x_uart_start_tx,
|
||||
.stop_rx = ar933x_uart_stop_rx,
|
||||
.enable_ms = ar933x_uart_enable_ms,
|
||||
.break_ctl = ar933x_uart_break_ctl,
|
||||
.startup = ar933x_uart_startup,
|
||||
.shutdown = ar933x_uart_shutdown,
|
||||
.set_termios = ar933x_uart_set_termios,
|
||||
.type = ar933x_uart_type,
|
||||
.release_port = ar933x_uart_release_port,
|
||||
.request_port = ar933x_uart_request_port,
|
||||
.config_port = ar933x_uart_config_port,
|
||||
.verify_port = ar933x_uart_verify_port,
|
||||
};
|
||||
|
||||
#ifdef CONFIG_SERIAL_AR933X_CONSOLE
|
||||
|
||||
static struct ar933x_uart_port *
|
||||
ar933x_console_ports[CONFIG_SERIAL_AR933X_NR_UARTS];
|
||||
|
||||
static void ar933x_uart_wait_xmitr(struct ar933x_uart_port *up)
|
||||
{
|
||||
unsigned int status;
|
||||
unsigned int timeout = 60000;
|
||||
|
||||
/* Wait up to 60ms for the character(s) to be sent. */
|
||||
do {
|
||||
status = ar933x_uart_read(up, AR933X_UART_DATA_REG);
|
||||
if (--timeout == 0)
|
||||
break;
|
||||
udelay(1);
|
||||
} while ((status & AR933X_UART_DATA_TX_CSR) == 0);
|
||||
}
|
||||
|
||||
static void ar933x_uart_console_putchar(struct uart_port *port, int ch)
|
||||
{
|
||||
struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
|
||||
|
||||
ar933x_uart_wait_xmitr(up);
|
||||
ar933x_uart_putc(up, ch);
|
||||
}
|
||||
|
||||
static void ar933x_uart_console_write(struct console *co, const char *s,
|
||||
unsigned int count)
|
||||
{
|
||||
struct ar933x_uart_port *up = ar933x_console_ports[co->index];
|
||||
unsigned long flags;
|
||||
unsigned int int_en;
|
||||
int locked = 1;
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
if (up->port.sysrq)
|
||||
locked = 0;
|
||||
else if (oops_in_progress)
|
||||
locked = spin_trylock(&up->port.lock);
|
||||
else
|
||||
spin_lock(&up->port.lock);
|
||||
|
||||
/*
|
||||
* First save the IER then disable the interrupts
|
||||
*/
|
||||
int_en = ar933x_uart_read(up, AR933X_UART_INT_EN_REG);
|
||||
ar933x_uart_write(up, AR933X_UART_INT_EN_REG, 0);
|
||||
|
||||
uart_console_write(&up->port, s, count, ar933x_uart_console_putchar);
|
||||
|
||||
/*
|
||||
* Finally, wait for transmitter to become empty
|
||||
* and restore the IER
|
||||
*/
|
||||
ar933x_uart_wait_xmitr(up);
|
||||
ar933x_uart_write(up, AR933X_UART_INT_EN_REG, int_en);
|
||||
|
||||
ar933x_uart_write(up, AR933X_UART_INT_REG, AR933X_UART_INT_ALLINTS);
|
||||
|
||||
if (locked)
|
||||
spin_unlock(&up->port.lock);
|
||||
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
static int ar933x_uart_console_setup(struct console *co, char *options)
|
||||
{
|
||||
struct ar933x_uart_port *up;
|
||||
int baud = 115200;
|
||||
int bits = 8;
|
||||
int parity = 'n';
|
||||
int flow = 'n';
|
||||
|
||||
if (co->index < 0 || co->index >= CONFIG_SERIAL_AR933X_NR_UARTS)
|
||||
return -EINVAL;
|
||||
|
||||
up = ar933x_console_ports[co->index];
|
||||
if (!up)
|
||||
return -ENODEV;
|
||||
|
||||
if (options)
|
||||
uart_parse_options(options, &baud, &parity, &bits, &flow);
|
||||
|
||||
return uart_set_options(&up->port, co, baud, parity, bits, flow);
|
||||
}
|
||||
|
||||
static struct console ar933x_uart_console = {
|
||||
.name = "ttyATH",
|
||||
.write = ar933x_uart_console_write,
|
||||
.device = uart_console_device,
|
||||
.setup = ar933x_uart_console_setup,
|
||||
.flags = CON_PRINTBUFFER,
|
||||
.index = -1,
|
||||
.data = &ar933x_uart_driver,
|
||||
};
|
||||
|
||||
static void ar933x_uart_add_console_port(struct ar933x_uart_port *up)
|
||||
{
|
||||
ar933x_console_ports[up->port.line] = up;
|
||||
}
|
||||
|
||||
#define AR933X_SERIAL_CONSOLE (&ar933x_uart_console)
|
||||
|
||||
#else
|
||||
|
||||
static inline void ar933x_uart_add_console_port(struct ar933x_uart_port *up) {}
|
||||
|
||||
#define AR933X_SERIAL_CONSOLE NULL
|
||||
|
||||
#endif /* CONFIG_SERIAL_AR933X_CONSOLE */
|
||||
|
||||
static struct uart_driver ar933x_uart_driver = {
|
||||
.owner = THIS_MODULE,
|
||||
.driver_name = DRIVER_NAME,
|
||||
.dev_name = "ttyATH",
|
||||
.nr = CONFIG_SERIAL_AR933X_NR_UARTS,
|
||||
.cons = AR933X_SERIAL_CONSOLE,
|
||||
};
|
||||
|
||||
static int __devinit ar933x_uart_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct ar933x_uart_platform_data *pdata;
|
||||
struct ar933x_uart_port *up;
|
||||
struct uart_port *port;
|
||||
struct resource *mem_res;
|
||||
struct resource *irq_res;
|
||||
int id;
|
||||
int ret;
|
||||
|
||||
pdata = pdev->dev.platform_data;
|
||||
if (!pdata)
|
||||
return -EINVAL;
|
||||
|
||||
id = pdev->id;
|
||||
if (id == -1)
|
||||
id = 0;
|
||||
|
||||
if (id > CONFIG_SERIAL_AR933X_NR_UARTS)
|
||||
return -EINVAL;
|
||||
|
||||
mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
if (!mem_res) {
|
||||
dev_err(&pdev->dev, "no MEM resource\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
||||
if (!irq_res) {
|
||||
dev_err(&pdev->dev, "no IRQ resource\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
up = kzalloc(sizeof(struct ar933x_uart_port), GFP_KERNEL);
|
||||
if (!up)
|
||||
return -ENOMEM;
|
||||
|
||||
port = &up->port;
|
||||
port->mapbase = mem_res->start;
|
||||
|
||||
port->membase = ioremap(mem_res->start, AR933X_UART_REGS_SIZE);
|
||||
if (!port->membase) {
|
||||
ret = -ENOMEM;
|
||||
goto err_free_up;
|
||||
}
|
||||
|
||||
port->line = id;
|
||||
port->irq = irq_res->start;
|
||||
port->dev = &pdev->dev;
|
||||
port->type = PORT_AR933X;
|
||||
port->iotype = UPIO_MEM32;
|
||||
port->uartclk = pdata->uartclk;
|
||||
|
||||
port->regshift = 2;
|
||||
port->fifosize = AR933X_UART_FIFO_SIZE;
|
||||
port->ops = &ar933x_uart_ops;
|
||||
|
||||
ar933x_uart_add_console_port(up);
|
||||
|
||||
ret = uart_add_one_port(&ar933x_uart_driver, &up->port);
|
||||
if (ret)
|
||||
goto err_unmap;
|
||||
|
||||
platform_set_drvdata(pdev, up);
|
||||
return 0;
|
||||
|
||||
err_unmap:
|
||||
iounmap(up->port.membase);
|
||||
err_free_up:
|
||||
kfree(up);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __devexit ar933x_uart_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct ar933x_uart_port *up;
|
||||
|
||||
up = platform_get_drvdata(pdev);
|
||||
platform_set_drvdata(pdev, NULL);
|
||||
|
||||
if (up) {
|
||||
uart_remove_one_port(&ar933x_uart_driver, &up->port);
|
||||
iounmap(up->port.membase);
|
||||
kfree(up);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver ar933x_uart_platform_driver = {
|
||||
.probe = ar933x_uart_probe,
|
||||
.remove = __devexit_p(ar933x_uart_remove),
|
||||
.driver = {
|
||||
.name = DRIVER_NAME,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
};
|
||||
|
||||
static int __init ar933x_uart_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ar933x_uart_driver.nr = CONFIG_SERIAL_AR933X_NR_UARTS;
|
||||
ret = uart_register_driver(&ar933x_uart_driver);
|
||||
if (ret)
|
||||
goto err_out;
|
||||
|
||||
ret = platform_driver_register(&ar933x_uart_platform_driver);
|
||||
if (ret)
|
||||
goto err_unregister_uart_driver;
|
||||
|
||||
return 0;
|
||||
|
||||
err_unregister_uart_driver:
|
||||
uart_unregister_driver(&ar933x_uart_driver);
|
||||
err_out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __exit ar933x_uart_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&ar933x_uart_platform_driver);
|
||||
uart_unregister_driver(&ar933x_uart_driver);
|
||||
}
|
||||
|
||||
module_init(ar933x_uart_init);
|
||||
module_exit(ar933x_uart_exit);
|
||||
|
||||
MODULE_DESCRIPTION("Atheros AR933X UART driver");
|
||||
MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_ALIAS("platform:" DRIVER_NAME);
|
||||
@ -207,6 +207,10 @@
|
||||
/* Xilinx PSS UART */
|
||||
#define PORT_XUARTPS 98
|
||||
|
||||
/* Atheros AR933X SoC */
|
||||
#define PORT_AR933X 99
|
||||
|
||||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
#include <linux/compiler.h>
|
||||
|
||||
Loading…
Reference in New Issue
Block a user