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@@ -1,789 +0,0 @@
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-From 1de387abd06fb67aaa8e27a48e378ffd9aaddd74 Mon Sep 17 00:00:00 2001
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-From: Gabor Juhos <[email protected]>
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-Date: Mon, 20 Jun 2011 19:26:11 +0200
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-Subject: [PATCH 14/27] SERIAL: AR933X: Add driver for the built-in UART of the SoC
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-
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-This patch adds the driver for the built-in UART of the
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-Atheros AR933X SoCs.
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-
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-Signed-off-by: Gabor Juhos <[email protected]>
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-Cc: [email protected]
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-Cc: Kathy Giori <[email protected]>
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-Cc: "Luis R. Rodriguez" <[email protected]>
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-Cc: Alan Cox <[email protected]>
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-Cc: [email protected]
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-Patchwork: https://patchwork.linux-mips.org/patch/2526/
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-Signed-off-by: Alan Cox <[email protected]>
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-Signed-off-by: Ralf Baechle <[email protected]>
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----
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- .../include/asm/mach-ath79/ar933x_uart_platform.h | 18 +
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- drivers/tty/serial/Kconfig | 23 +
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- drivers/tty/serial/Makefile | 1 +
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- drivers/tty/serial/ar933x_uart.c | 688 ++++++++++++++++++++
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- include/linux/serial_core.h | 4 +
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- 5 files changed, 734 insertions(+), 0 deletions(-)
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- create mode 100644 arch/mips/include/asm/mach-ath79/ar933x_uart_platform.h
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- create mode 100644 drivers/tty/serial/ar933x_uart.c
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-
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---- /dev/null
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-+++ b/arch/mips/include/asm/mach-ath79/ar933x_uart_platform.h
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-@@ -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 <[email protected]>
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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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-+
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-+#ifndef _AR933X_UART_PLATFORM_H
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-+#define _AR933X_UART_PLATFORM_H
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-+
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-+struct ar933x_uart_platform_data {
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-+ unsigned uartclk;
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-+};
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-+
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-+#endif /* _AR933X_UART_PLATFORM_H */
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---- a/drivers/tty/serial/Kconfig
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-+++ b/drivers/tty/serial/Kconfig
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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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-
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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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-+
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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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-+
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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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-+
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- endmenu
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---- a/drivers/tty/serial/Makefile
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-+++ b/drivers/tty/serial/Makefile
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-@@ -94,3 +94,4 @@ obj-$(CONFIG_SERIAL_MSM_SMD) += msm_smd_
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- obj-$(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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---- /dev/null
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-+++ b/drivers/tty/serial/ar933x_uart.c
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-@@ -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 <[email protected]>
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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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-+
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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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-+
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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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-+
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-+#define DRIVER_NAME "ar933x-uart"
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-+
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-+#define AR933X_DUMMY_STATUS_RD 0x01
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-+
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-+static struct uart_driver ar933x_uart_driver;
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-+
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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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-+
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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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-+
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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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-+
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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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-+
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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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-+
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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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-+
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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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-+
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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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-+
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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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-+
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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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-+
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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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-+
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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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-+
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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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-+
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-+ return (rdata & AR933X_UART_DATA_TX_CSR) ? 0 : TIOCSER_TEMT;
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-+}
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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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-+
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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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-+
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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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-+
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-+ ar933x_uart_start_tx_interrupt(up);
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-+}
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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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-+
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-+ ar933x_uart_stop_tx_interrupt(up);
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-+}
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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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-+
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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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-+
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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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-+
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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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-+
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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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-+
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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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-+
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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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-+
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-+ /* Only one stop bit is supported */
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-+ new->c_cflag &= ~CSTOPB;
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-+
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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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-+
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-+ /* Mark/space parity is not supported */
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-+ new->c_cflag &= ~CMSPAR;
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-+
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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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-+ /*
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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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-+
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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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-+
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-+ up->port.ignore_status_mask = 0;
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-+
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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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-+
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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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-+
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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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-+
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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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-+
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-+ spin_unlock_irqrestore(&up->port.lock, flags);
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-+
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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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-+
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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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-+
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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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-+
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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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-+
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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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-+
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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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-+
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-+ up->port.icount.rx++;
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-+ ch = rdata & AR933X_UART_DATA_TX_RX_MASK;
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-+
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-+ if (uart_handle_sysrq_char(&up->port, ch))
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-+ continue;
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-+
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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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-+
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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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-+
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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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-+
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-+ if (uart_tx_stopped(&up->port))
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-+ return;
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-+
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-+ count = up->port.fifosize;
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-+ do {
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-+ unsigned int rdata;
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-+
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|
|
-+ rdata = ar933x_uart_read(up, AR933X_UART_DATA_REG);
|
|
|
-+ if ((rdata & AR933X_UART_DATA_TX_CSR) == 0)
|
|
|
-+ break;
|
|
|
-+
|
|
|
-+ if (up->port.x_char) {
|
|
|
-+ ar933x_uart_putc(up, up->port.x_char);
|
|
|
-+ up->port.icount.tx++;
|
|
|
-+ up->port.x_char = 0;
|
|
|
-+ continue;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ if (uart_circ_empty(xmit))
|
|
|
-+ break;
|
|
|
-+
|
|
|
-+ ar933x_uart_putc(up, xmit->buf[xmit->tail]);
|
|
|
-+
|
|
|
-+ xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
|
|
|
-+ up->port.icount.tx++;
|
|
|
-+ } while (--count > 0);
|
|
|
-+
|
|
|
-+ if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
|
|
|
-+ uart_write_wakeup(&up->port);
|
|
|
-+
|
|
|
-+ if (!uart_circ_empty(xmit))
|
|
|
-+ ar933x_uart_start_tx_interrupt(up);
|
|
|
-+}
|
|
|
-+
|
|
|
-+static irqreturn_t ar933x_uart_interrupt(int irq, void *dev_id)
|
|
|
-+{
|
|
|
-+ struct ar933x_uart_port *up = dev_id;
|
|
|
-+ unsigned int status;
|
|
|
-+
|
|
|
-+ status = ar933x_uart_read(up, AR933X_UART_CS_REG);
|
|
|
-+ if ((status & AR933X_UART_CS_HOST_INT) == 0)
|
|
|
-+ return IRQ_NONE;
|
|
|
-+
|
|
|
-+ spin_lock(&up->port.lock);
|
|
|
-+
|
|
|
-+ status = ar933x_uart_read(up, AR933X_UART_INT_REG);
|
|
|
-+ status &= ar933x_uart_read(up, AR933X_UART_INT_EN_REG);
|
|
|
-+
|
|
|
-+ if (status & AR933X_UART_INT_RX_VALID) {
|
|
|
-+ ar933x_uart_write(up, AR933X_UART_INT_REG,
|
|
|
-+ AR933X_UART_INT_RX_VALID);
|
|
|
-+ ar933x_uart_rx_chars(up);
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ if (status & AR933X_UART_INT_TX_EMPTY) {
|
|
|
-+ ar933x_uart_write(up, AR933X_UART_INT_REG,
|
|
|
-+ AR933X_UART_INT_TX_EMPTY);
|
|
|
-+ ar933x_uart_stop_tx_interrupt(up);
|
|
|
-+ ar933x_uart_tx_chars(up);
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ spin_unlock(&up->port.lock);
|
|
|
-+
|
|
|
-+ return IRQ_HANDLED;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static int ar933x_uart_startup(struct uart_port *port)
|
|
|
-+{
|
|
|
-+ struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
|
|
|
-+ unsigned long flags;
|
|
|
-+ int ret;
|
|
|
-+
|
|
|
-+ ret = request_irq(up->port.irq, ar933x_uart_interrupt,
|
|
|
-+ up->port.irqflags, dev_name(up->port.dev), up);
|
|
|
-+ if (ret)
|
|
|
-+ return ret;
|
|
|
-+
|
|
|
-+ spin_lock_irqsave(&up->port.lock, flags);
|
|
|
-+
|
|
|
-+ /* Enable HOST interrupts */
|
|
|
-+ ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
|
|
|
-+ AR933X_UART_CS_HOST_INT_EN);
|
|
|
-+
|
|
|
-+ /* Enable RX interrupts */
|
|
|
-+ up->ier = AR933X_UART_INT_RX_VALID;
|
|
|
-+ ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
|
|
|
-+
|
|
|
-+ spin_unlock_irqrestore(&up->port.lock, flags);
|
|
|
-+
|
|
|
-+ return 0;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static void ar933x_uart_shutdown(struct uart_port *port)
|
|
|
-+{
|
|
|
-+ struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
|
|
|
-+
|
|
|
-+ /* Disable all interrupts */
|
|
|
-+ up->ier = 0;
|
|
|
-+ ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
|
|
|
-+
|
|
|
-+ /* Disable break condition */
|
|
|
-+ ar933x_uart_rmw_clear(up, AR933X_UART_CS_REG,
|
|
|
-+ AR933X_UART_CS_TX_BREAK);
|
|
|
-+
|
|
|
-+ free_irq(up->port.irq, up);
|
|
|
-+}
|
|
|
-+
|
|
|
-+static const char *ar933x_uart_type(struct uart_port *port)
|
|
|
-+{
|
|
|
-+ return (port->type == PORT_AR933X) ? "AR933X UART" : NULL;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static void ar933x_uart_release_port(struct uart_port *port)
|
|
|
-+{
|
|
|
-+ /* Nothing to release ... */
|
|
|
-+}
|
|
|
-+
|
|
|
-+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 <[email protected]>");
|
|
|
-+MODULE_LICENSE("GPL v2");
|
|
|
-+MODULE_ALIAS("platform:" DRIVER_NAME);
|
|
|
---- a/include/linux/serial_core.h
|
|
|
-+++ b/include/linux/serial_core.h
|
|
|
-@@ -207,6 +207,10 @@
|
|
|
- /* Xilinx PSS UART */
|
|
|
- #define PORT_XUARTPS 98
|
|
|
-
|
|
|
-+/* Atheros AR933X SoC */
|
|
|
-+#define PORT_AR933X 99
|
|
|
-+
|
|
|
-+
|
|
|
- #ifdef __KERNEL__
|
|
|
-
|
|
|
- #include <linux/compiler.h>
|