serial: remove sirf prima/atlas driver

The CSR SiRF prima2/atlas platforms are getting removed, so this driver
is no longer needed.

Cc: Barry Song <baohua@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20210120161324.3728294-1-arnd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

5 files changed, 0 insertions, 2007 deletions

diff --git a/Documentation/devicetree/bindings/serial/sirf-uart.txt b/Documentation/devicetree/bindings/serial/sirf-uart.txt
deleted file mode 100644
index 1e48bbbeecc6..000000000000
--- a/Documentation/devicetree/bindings/serial/sirf-uart.txt
+++ /dev/null
@@ -1,34 +0,0 @@
-* CSR SiRFprimaII/atlasVI Universal Synchronous Asynchronous Receiver/Transmitter *
-
-Required properties:
-- compatible : Should be "sirf,prima2-uart", "sirf, prima2-usp-uart",
-		"sirf,atlas7-uart" or "sirf,atlas7-usp-uart".
-- reg : Offset and length of the register set for the device
-- interrupts : Should contain uart interrupt
-- fifosize : Should define hardware rx/tx fifo size
-- clocks : Should contain uart clock number
-
-Optional properties:
-- uart-has-rtscts: we have hardware flow controller pins in hardware
-- rts-gpios: RTS pin for USP-based UART if uart-has-rtscts is true
-- cts-gpios: CTS pin for USP-based UART if uart-has-rtscts is true
-
-Example:
-
-uart0: uart@b0050000 {
-	cell-index = <0>;
-	compatible = "sirf,prima2-uart";
-	reg = <0xb0050000 0x1000>;
-	interrupts = <17>;
-	fifosize = <128>;
-	clocks = <&clks 13>;
-};
-
-On the board-specific dts, we can put rts-gpios and cts-gpios like
-
-usp@b0090000 {
-	compatible = "sirf,prima2-usp-uart";
-	uart-has-rtscts;
-	rts-gpios = <&gpio 15 0>;
-	cts-gpios = <&gpio 46 0>;
-};
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 83f6ca4bf210..22e86ba4f827 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -276,28 +276,6 @@ config SERIAL_SAMSUNG_CONSOLE
 	  your boot loader about how to pass options to the kernel at
 	  boot time.)
 
-config SERIAL_SIRFSOC
-	tristate "SiRF SoC Platform Serial port support"
-	depends on ARCH_SIRF
-	select SERIAL_CORE
-	help
-	  Support for the on-chip UART on the CSR SiRFprimaII series,
-	  providing /dev/ttySiRF0, 1 and 2 (note, some machines may not
-	  provide all of these ports, depending on how the serial port
-	  pins are configured).
-
-config SERIAL_SIRFSOC_CONSOLE
-	bool "Support for console on SiRF SoC serial port"
-	depends on SERIAL_SIRFSOC=y
-	select SERIAL_CORE_CONSOLE
-	help
-	  Even if you say Y here, the currently visible virtual console
-	  (/dev/tty0) will still be used as the system console by default, but
-	  you can alter that using a kernel command line option such as
-	  "console=ttySiRFx". (Try "man bootparam" or see the documentation of
-	  your boot loader about how to pass options to the kernel at
-	  boot time.)
-
 config SERIAL_TEGRA
 	tristate "NVIDIA Tegra20/30 SoC serial controller"
 	depends on ARCH_TEGRA && TEGRA20_APB_DMA
diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile
index ec2b74091f0c..931dc1d6885e 100644
--- a/drivers/tty/serial/Makefile
+++ b/drivers/tty/serial/Makefile
@@ -69,7 +69,6 @@ obj-$(CONFIG_SERIAL_PCH_UART)	+= pch_uart.o
 obj-$(CONFIG_SERIAL_MXS_AUART) += mxs-auart.o
 obj-$(CONFIG_SERIAL_LANTIQ)	+= lantiq.o
 obj-$(CONFIG_SERIAL_XILINX_PS_UART) += xilinx_uartps.o
-obj-$(CONFIG_SERIAL_SIRFSOC) += sirfsoc_uart.o
 obj-$(CONFIG_SERIAL_TEGRA) += serial-tegra.o
 obj-$(CONFIG_SERIAL_TEGRA_TCU) += tegra-tcu.o
 obj-$(CONFIG_SERIAL_AR933X)   += ar933x_uart.o
diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c
deleted file mode 100644
index 38622f2a30a9..000000000000
--- a/drivers/tty/serial/sirfsoc_uart.c
+++ /dev/null
@@ -1,1503 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Driver for CSR SiRFprimaII onboard UARTs.
- *
- * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
- */
-
-#include <linux/module.h>
-#include <linux/ioport.h>
-#include <linux/platform_device.h>
-#include <linux/init.h>
-#include <linux/sysrq.h>
-#include <linux/console.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial_core.h>
-#include <linux/serial.h>
-#include <linux/clk.h>
-#include <linux/of.h>
-#include <linux/slab.h>
-#include <linux/io.h>
-#include <linux/of_gpio.h>
-#include <linux/dmaengine.h>
-#include <linux/dma-direction.h>
-#include <linux/dma-mapping.h>
-#include <asm/irq.h>
-#include <asm/mach/irq.h>
-
-#include "sirfsoc_uart.h"
-
-static unsigned int
-sirfsoc_uart_pio_tx_chars(struct sirfsoc_uart_port *sirfport, int count);
-static unsigned int
-sirfsoc_uart_pio_rx_chars(struct uart_port *port, unsigned int max_rx_count);
-static struct uart_driver sirfsoc_uart_drv;
-
-static void sirfsoc_uart_tx_dma_complete_callback(void *param);
-static const struct sirfsoc_baudrate_to_regv baudrate_to_regv[] = {
-	{4000000, 2359296},
-	{3500000, 1310721},
-	{3000000, 1572865},
-	{2500000, 1245186},
-	{2000000, 1572866},
-	{1500000, 1245188},
-	{1152000, 1638404},
-	{1000000, 1572869},
-	{921600, 1114120},
-	{576000, 1245196},
-	{500000, 1245198},
-	{460800, 1572876},
-	{230400, 1310750},
-	{115200, 1310781},
-	{57600, 1310843},
-	{38400, 1114328},
-	{19200, 1114545},
-	{9600, 1114979},
-};
-
-static struct sirfsoc_uart_port *sirf_ports[SIRFSOC_UART_NR];
-
-static inline struct sirfsoc_uart_port *to_sirfport(struct uart_port *port)
-{
-	return container_of(port, struct sirfsoc_uart_port, port);
-}
-
-static inline unsigned int sirfsoc_uart_tx_empty(struct uart_port *port)
-{
-	unsigned long reg;
-	struct sirfsoc_uart_port *sirfport = to_sirfport(port);
-	struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
-	struct sirfsoc_fifo_status *ufifo_st = &sirfport->uart_reg->fifo_status;
-	reg = rd_regl(port, ureg->sirfsoc_tx_fifo_status);
-	return (reg & ufifo_st->ff_empty(port)) ? TIOCSER_TEMT : 0;
-}
-
-static unsigned int sirfsoc_uart_get_mctrl(struct uart_port *port)
-{
-	struct sirfsoc_uart_port *sirfport = to_sirfport(port);
-	struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
-	if (!sirfport->hw_flow_ctrl || !sirfport->ms_enabled)
-		goto cts_asserted;
-	if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
-		if (!(rd_regl(port, ureg->sirfsoc_afc_ctrl) &
-						SIRFUART_AFC_CTS_STATUS))
-			goto cts_asserted;
-		else
-			goto cts_deasserted;
-	} else {
-		if (!gpio_get_value(sirfport->cts_gpio))
-			goto cts_asserted;
-		else
-			goto cts_deasserted;
-	}
-cts_deasserted:
-	return TIOCM_CAR | TIOCM_DSR;
-cts_asserted:
-	return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS;
-}
-
-static void sirfsoc_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
-	struct sirfsoc_uart_port *sirfport = to_sirfport(port);
-	struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
-	unsigned int assert = mctrl & TIOCM_RTS;
-	unsigned int val = assert ? SIRFUART_AFC_CTRL_RX_THD : 0x0;
-	unsigned int current_val;
-
-	if (mctrl & TIOCM_LOOP) {
-		if (sirfport->uart_reg->uart_type == SIRF_REAL_UART)
-			wr_regl(port, ureg->sirfsoc_line_ctrl,
-				rd_regl(port, ureg->sirfsoc_line_ctrl) |
-				SIRFUART_LOOP_BACK);
-		else
-			wr_regl(port, ureg->sirfsoc_mode1,
-				rd_regl(port, ureg->sirfsoc_mode1) |
-				SIRFSOC_USP_LOOP_BACK_CTRL);
-	} else {
-		if (sirfport->uart_reg->uart_type == SIRF_REAL_UART)
-			wr_regl(port, ureg->sirfsoc_line_ctrl,
-				rd_regl(port, ureg->sirfsoc_line_ctrl) &
-				~SIRFUART_LOOP_BACK);
-		else
-			wr_regl(port, ureg->sirfsoc_mode1,
-				rd_regl(port, ureg->sirfsoc_mode1) &
-				~SIRFSOC_USP_LOOP_BACK_CTRL);
-	}
-
-	if (!sirfport->hw_flow_ctrl || !sirfport->ms_enabled)
-		return;
-	if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
-		current_val = rd_regl(port, ureg->sirfsoc_afc_ctrl) & ~0xFF;
-		val |= current_val;
-		wr_regl(port, ureg->sirfsoc_afc_ctrl, val);
-	} else {
-		if (!val)
-			gpio_set_value(sirfport->rts_gpio, 1);
-		else
-			gpio_set_value(sirfport->rts_gpio, 0);
-	}
-}
-
-static void sirfsoc_uart_stop_tx(struct uart_port *port)
-{
-	struct sirfsoc_uart_port *sirfport = to_sirfport(port);
-	struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
-	struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
-
-	if (sirfport->tx_dma_chan) {
-		if (sirfport->tx_dma_state == TX_DMA_RUNNING) {
-			dmaengine_pause(sirfport->tx_dma_chan);
-			sirfport->tx_dma_state = TX_DMA_PAUSE;
-		} else {
-			if (!sirfport->is_atlas7)
-				wr_regl(port, ureg->sirfsoc_int_en_reg,
-				rd_regl(port, ureg->sirfsoc_int_en_reg) &
-				~uint_en->sirfsoc_txfifo_empty_en);
-			else
-				wr_regl(port, ureg->sirfsoc_int_en_clr_reg,
-				uint_en->sirfsoc_txfifo_empty_en);
-		}
-	} else {
-		if (sirfport->uart_reg->uart_type == SIRF_USP_UART)
-			wr_regl(port, ureg->sirfsoc_tx_rx_en, rd_regl(port,
-				ureg->sirfsoc_tx_rx_en) & ~SIRFUART_TX_EN);
-		if (!sirfport->is_atlas7)
-			wr_regl(port, ureg->sirfsoc_int_en_reg,
-				rd_regl(port, ureg->sirfsoc_int_en_reg) &
-				~uint_en->sirfsoc_txfifo_empty_en);
-		else
-			wr_regl(port, ureg->sirfsoc_int_en_clr_reg,
-				uint_en->sirfsoc_txfifo_empty_en);
-	}
-}
-
-static void sirfsoc_uart_tx_with_dma(struct sirfsoc_uart_port *sirfport)
-{
-	struct uart_port *port = &sirfport->port;
-	struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
-	struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
-	struct circ_buf *xmit = &port->state->xmit;
-	unsigned long tran_size;
-	unsigned long tran_start;
-	unsigned long pio_tx_size;
-
-	tran_size = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);
-	tran_start = (unsigned long)(xmit->buf + xmit->tail);
-	if (uart_circ_empty(xmit) || uart_tx_stopped(port) ||
-			!tran_size)
-		return;
-	if (sirfport->tx_dma_state == TX_DMA_PAUSE) {
-		dmaengine_resume(sirfport->tx_dma_chan);
-		return;
-	}
-	if (sirfport->tx_dma_state == TX_DMA_RUNNING)
-		return;
-	if (!sirfport->is_atlas7)
-		wr_regl(port, ureg->sirfsoc_int_en_reg,
-				rd_regl(port, ureg->sirfsoc_int_en_reg)&
-				~(uint_en->sirfsoc_txfifo_empty_en));
-	else
-		wr_regl(port, ureg->sirfsoc_int_en_clr_reg,
-				uint_en->sirfsoc_txfifo_empty_en);
-	/*
-	 * DMA requires buffer address and buffer length are both aligned with
-	 * 4 bytes, so we use PIO for
-	 * 1. if address is not aligned with 4bytes, use PIO for the first 1~3
-	 * bytes, and move to DMA for the left part aligned with 4bytes
-	 * 2. if buffer length is not aligned with 4bytes, use DMA for aligned
-	 * part first, move to PIO for the left 1~3 bytes
-	 */
-	if (tran_size < 4 || BYTES_TO_ALIGN(tran_start)) {
-		wr_regl(port, ureg->sirfsoc_tx_fifo_op, SIRFUART_FIFO_STOP);
-		wr_regl(port, ureg->sirfsoc_tx_dma_io_ctrl,
-			rd_regl(port, ureg->sirfsoc_tx_dma_io_ctrl)|
-			SIRFUART_IO_MODE);
-		if (BYTES_TO_ALIGN(tran_start)) {
-			pio_tx_size = sirfsoc_uart_pio_tx_chars(sirfport,
-				BYTES_TO_ALIGN(tran_start));
-			tran_size -= pio_tx_size;
-		}
-		if (tran_size < 4)
-			sirfsoc_uart_pio_tx_chars(sirfport, tran_size);
-		if (!sirfport->is_atlas7)
-			wr_regl(port, ureg->sirfsoc_int_en_reg,
-				rd_regl(port, ureg->sirfsoc_int_en_reg)|
-				uint_en->sirfsoc_txfifo_empty_en);
-		else
-			wr_regl(port, ureg->sirfsoc_int_en_reg,
-				uint_en->sirfsoc_txfifo_empty_en);
-		wr_regl(port, ureg->sirfsoc_tx_fifo_op, SIRFUART_FIFO_START);
-	} else {
-		/* tx transfer mode switch into dma mode */
-		wr_regl(port, ureg->sirfsoc_tx_fifo_op, SIRFUART_FIFO_STOP);
-		wr_regl(port, ureg->sirfsoc_tx_dma_io_ctrl,
-			rd_regl(port, ureg->sirfsoc_tx_dma_io_ctrl)&
-			~SIRFUART_IO_MODE);
-		wr_regl(port, ureg->sirfsoc_tx_fifo_op, SIRFUART_FIFO_START);
-		tran_size &= ~(0x3);
-
-		sirfport->tx_dma_addr = dma_map_single(port->dev,
-			xmit->buf + xmit->tail,
-			tran_size, DMA_TO_DEVICE);
-		sirfport->tx_dma_desc = dmaengine_prep_slave_single(
-			sirfport->tx_dma_chan, sirfport->tx_dma_addr,
-			tran_size, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT);
-		if (!sirfport->tx_dma_desc) {
-			dev_err(port->dev, "DMA prep slave single fail\n");
-			return;
-		}
-		sirfport->tx_dma_desc->callback =
-			sirfsoc_uart_tx_dma_complete_callback;
-		sirfport->tx_dma_desc->callback_param = (void *)sirfport;
-		sirfport->transfer_size = tran_size;
-
-		dmaengine_submit(sirfport->tx_dma_desc);
-		dma_async_issue_pending(sirfport->tx_dma_chan);
-		sirfport->tx_dma_state = TX_DMA_RUNNING;
-	}
-}
-
-static void sirfsoc_uart_start_tx(struct uart_port *port)
-{
-	struct sirfsoc_uart_port *sirfport = to_sirfport(port);
-	struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
-	struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
-	if (sirfport->tx_dma_chan)
-		sirfsoc_uart_tx_with_dma(sirfport);
-	else {
-		if (sirfport->uart_reg->uart_type == SIRF_USP_UART)
-			wr_regl(port, ureg->sirfsoc_tx_rx_en, rd_regl(port,
-				ureg->sirfsoc_tx_rx_en) | SIRFUART_TX_EN);
-		wr_regl(port, ureg->sirfsoc_tx_fifo_op, SIRFUART_FIFO_STOP);
-		sirfsoc_uart_pio_tx_chars(sirfport, port->fifosize);
-		wr_regl(port, ureg->sirfsoc_tx_fifo_op, SIRFUART_FIFO_START);
-		if (!sirfport->is_atlas7)
-			wr_regl(port, ureg->sirfsoc_int_en_reg,
-					rd_regl(port, ureg->sirfsoc_int_en_reg)|
-					uint_en->sirfsoc_txfifo_empty_en);
-		else
-			wr_regl(port, ureg->sirfsoc_int_en_reg,
-					uint_en->sirfsoc_txfifo_empty_en);
-	}
-}
-
-static void sirfsoc_uart_stop_rx(struct uart_port *port)
-{
-	struct sirfsoc_uart_port *sirfport = to_sirfport(port);
-	struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
-	struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
-
-	wr_regl(port, ureg->sirfsoc_rx_fifo_op, 0);
-	if (sirfport->rx_dma_chan) {
-		if (!sirfport->is_atlas7)
-			wr_regl(port, ureg->sirfsoc_int_en_reg,
-				rd_regl(port, ureg->sirfsoc_int_en_reg) &
-				~(SIRFUART_RX_DMA_INT_EN(uint_en,
-				sirfport->uart_reg->uart_type) |
-				uint_en->sirfsoc_rx_done_en));
-		else
-			wr_regl(port, ureg->sirfsoc_int_en_clr_reg,
-				SIRFUART_RX_DMA_INT_EN(uint_en,
-				sirfport->uart_reg->uart_type)|
-				uint_en->sirfsoc_rx_done_en);
-		dmaengine_terminate_all(sirfport->rx_dma_chan);
-	} else {
-		if (!sirfport->is_atlas7)
-			wr_regl(port, ureg->sirfsoc_int_en_reg,
-				rd_regl(port, ureg->sirfsoc_int_en_reg)&
-				~(SIRFUART_RX_IO_INT_EN(uint_en,
-				sirfport->uart_reg->uart_type)));
-		else
-			wr_regl(port, ureg->sirfsoc_int_en_clr_reg,
-				SIRFUART_RX_IO_INT_EN(uint_en,
-				sirfport->uart_reg->uart_type));
-	}
-}
-
-static void sirfsoc_uart_disable_ms(struct uart_port *port)
-{
-	struct sirfsoc_uart_port *sirfport = to_sirfport(port);
-	struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
-	struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
-
-	if (!sirfport->hw_flow_ctrl)
-		return;
-	sirfport->ms_enabled = false;
-	if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
-		wr_regl(port, ureg->sirfsoc_afc_ctrl,
-				rd_regl(port, ureg->sirfsoc_afc_ctrl) & ~0x3FF);
-		if (!sirfport->is_atlas7)
-			wr_regl(port, ureg->sirfsoc_int_en_reg,
-					rd_regl(port, ureg->sirfsoc_int_en_reg)&
-					~uint_en->sirfsoc_cts_en);
-		else
-			wr_regl(port, ureg->sirfsoc_int_en_clr_reg,
-					uint_en->sirfsoc_cts_en);
-	} else
-		disable_irq(gpio_to_irq(sirfport->cts_gpio));
-}
-
-static irqreturn_t sirfsoc_uart_usp_cts_handler(int irq, void *dev_id)
-{
-	struct sirfsoc_uart_port *sirfport = (struct sirfsoc_uart_port *)dev_id;
-	struct uart_port *port = &sirfport->port;
-	spin_lock(&port->lock);
-	if (gpio_is_valid(sirfport->cts_gpio) && sirfport->ms_enabled)
-		uart_handle_cts_change(port,
-				!gpio_get_value(sirfport->cts_gpio));
-	spin_unlock(&port->lock);
-	return IRQ_HANDLED;
-}
-
-static void sirfsoc_uart_enable_ms(struct uart_port *port)
-{
-	struct sirfsoc_uart_port *sirfport = to_sirfport(port);
-	struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
-	struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
-
-	if (!sirfport->hw_flow_ctrl)
-		return;
-	sirfport->ms_enabled = true;
-	if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
-		wr_regl(port, ureg->sirfsoc_afc_ctrl,
-				rd_regl(port, ureg->sirfsoc_afc_ctrl) |
-				SIRFUART_AFC_TX_EN | SIRFUART_AFC_RX_EN |
-				SIRFUART_AFC_CTRL_RX_THD);
-		if (!sirfport->is_atlas7)
-			wr_regl(port, ureg->sirfsoc_int_en_reg,
-					rd_regl(port, ureg->sirfsoc_int_en_reg)
-					| uint_en->sirfsoc_cts_en);
-		else
-			wr_regl(port, ureg->sirfsoc_int_en_reg,
-					uint_en->sirfsoc_cts_en);
-	} else
-		enable_irq(gpio_to_irq(sirfport->cts_gpio));
-}
-
-static void sirfsoc_uart_break_ctl(struct uart_port *port, int break_state)
-{
-	struct sirfsoc_uart_port *sirfport = to_sirfport(port);
-	struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
-	if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
-		unsigned long ulcon = rd_regl(port, ureg->sirfsoc_line_ctrl);
-		if (break_state)
-			ulcon |= SIRFUART_SET_BREAK;
-		else
-			ulcon &= ~SIRFUART_SET_BREAK;
-		wr_regl(port, ureg->sirfsoc_line_ctrl, ulcon);
-	}
-}
-
-static unsigned int
-sirfsoc_uart_pio_rx_chars(struct uart_port *port, unsigned int max_rx_count)
-{
-	struct sirfsoc_uart_port *sirfport = to_sirfport(port);
-	struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
-	struct sirfsoc_fifo_status *ufifo_st = &sirfport->uart_reg->fifo_status;
-	unsigned int ch, rx_count = 0;
-	struct tty_struct *tty;
-	tty = tty_port_tty_get(&port->state->port);
-	if (!tty)
-		return -ENODEV;
-	while (!(rd_regl(port, ureg->sirfsoc_rx_fifo_status) &
-					ufifo_st->ff_empty(port))) {
-		ch = rd_regl(port, ureg->sirfsoc_rx_fifo_data) |
-			SIRFUART_DUMMY_READ;
-		if (unlikely(uart_handle_sysrq_char(port, ch)))
-			continue;
-		uart_insert_char(port, 0, 0, ch, TTY_NORMAL);
-		rx_count++;
-		if (rx_count >= max_rx_count)
-			break;
-	}
-
-	port->icount.rx += rx_count;
-
-	return rx_count;
-}
-
-static unsigned int
-sirfsoc_uart_pio_tx_chars(struct sirfsoc_uart_port *sirfport, int count)
-{
-	struct uart_port *port = &sirfport->port;
-	struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
-	struct sirfsoc_fifo_status *ufifo_st = &sirfport->uart_reg->fifo_status;
-	struct circ_buf *xmit = &port->state->xmit;
-	unsigned int num_tx = 0;
-	while (!uart_circ_empty(xmit) &&
-		!(rd_regl(port, ureg->sirfsoc_tx_fifo_status) &
-					ufifo_st->ff_full(port)) &&
-		count--) {
-		wr_regl(port, ureg->sirfsoc_tx_fifo_data,
-				xmit->buf[xmit->tail]);
-		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-		port->icount.tx++;
-		num_tx++;
-	}
-	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(port);
-	return num_tx;
-}
-
-static void sirfsoc_uart_tx_dma_complete_callback(void *param)
-{
-	struct sirfsoc_uart_port *sirfport = (struct sirfsoc_uart_port *)param;
-	struct uart_port *port = &sirfport->port;
-	struct circ_buf *xmit = &port->state->xmit;
-	unsigned long flags;
-
-	spin_lock_irqsave(&port->lock, flags);
-	xmit->tail = (xmit->tail + sirfport->transfer_size) &
-				(UART_XMIT_SIZE - 1);
-	port->icount.tx += sirfport->transfer_size;
-	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(port);
-	if (sirfport->tx_dma_addr)
-		dma_unmap_single(port->dev, sirfport->tx_dma_addr,
-				sirfport->transfer_size, DMA_TO_DEVICE);
-	sirfport->tx_dma_state = TX_DMA_IDLE;
-	sirfsoc_uart_tx_with_dma(sirfport);
-	spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static irqreturn_t sirfsoc_uart_isr(int irq, void *dev_id)
-{
-	unsigned long intr_status;
-	unsigned long cts_status;
-	unsigned long flag = TTY_NORMAL;
-	struct sirfsoc_uart_port *sirfport = (struct sirfsoc_uart_port *)dev_id;
-	struct uart_port *port = &sirfport->port;
-	struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
-	struct sirfsoc_fifo_status *ufifo_st = &sirfport->uart_reg->fifo_status;
-	struct sirfsoc_int_status *uint_st = &sirfport->uart_reg->uart_int_st;
-	struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
-	struct uart_state *state = port->state;
-	struct circ_buf *xmit = &port->state->xmit;
-	spin_lock(&port->lock);
-	intr_status = rd_regl(port, ureg->sirfsoc_int_st_reg);
-	wr_regl(port, ureg->sirfsoc_int_st_reg, intr_status);
-	intr_status &= rd_regl(port, ureg->sirfsoc_int_en_reg);
-	if (unlikely(intr_status & (SIRFUART_ERR_INT_STAT(uint_st,
-				sirfport->uart_reg->uart_type)))) {
-		if (intr_status & uint_st->sirfsoc_rxd_brk) {
-			port->icount.brk++;
-			if (uart_handle_break(port))
-				goto recv_char;
-		}
-		if (intr_status & uint_st->sirfsoc_rx_oflow) {
-			port->icount.overrun++;
-			flag = TTY_OVERRUN;
-		}
-		if (intr_status & uint_st->sirfsoc_frm_err) {
-			port->icount.frame++;
-			flag = TTY_FRAME;
-		}
-		if (intr_status & uint_st->sirfsoc_parity_err) {
-			port->icount.parity++;
-			flag = TTY_PARITY;
-		}
-		wr_regl(port, ureg->sirfsoc_rx_fifo_op, SIRFUART_FIFO_RESET);
-		wr_regl(port, ureg->sirfsoc_rx_fifo_op, 0);
-		wr_regl(port, ureg->sirfsoc_rx_fifo_op, SIRFUART_FIFO_START);
-		intr_status &= port->read_status_mask;
-		uart_insert_char(port, intr_status,
-					uint_en->sirfsoc_rx_oflow_en, 0, flag);
-	}
-recv_char:
-	if ((sirfport->uart_reg->uart_type == SIRF_REAL_UART) &&
-			(intr_status & SIRFUART_CTS_INT_ST(uint_st)) &&
-			!sirfport->tx_dma_state) {
-		cts_status = rd_regl(port, ureg->sirfsoc_afc_ctrl) &
-					SIRFUART_AFC_CTS_STATUS;
-		if (cts_status != 0)
-			cts_status = 0;
-		else
-			cts_status = 1;
-		uart_handle_cts_change(port, cts_status);
-		wake_up_interruptible(&state->port.delta_msr_wait);
-	}
-	if (!sirfport->rx_dma_chan &&
-		(intr_status & SIRFUART_RX_IO_INT_ST(uint_st))) {
-		/*
-		 * chip will trigger continuous RX_TIMEOUT interrupt
-		 * in RXFIFO empty and not trigger if RXFIFO recevice
-		 * data in limit time, original method use RX_TIMEOUT
-		 * will trigger lots of useless interrupt in RXFIFO
-		 * empty.RXFIFO received one byte will trigger RX_DONE
-		 * interrupt.use RX_DONE to wait for data received
-		 * into RXFIFO, use RX_THD/RX_FULL for lots data receive
-		 * and use RX_TIMEOUT for the last left data.
-		 */
-		if (intr_status & uint_st->sirfsoc_rx_done) {
-			if (!sirfport->is_atlas7) {
-				wr_regl(port, ureg->sirfsoc_int_en_reg,
-					rd_regl(port, ureg->sirfsoc_int_en_reg)
-					& ~(uint_en->sirfsoc_rx_done_en));
-				wr_regl(port, ureg->sirfsoc_int_en_reg,
-				rd_regl(port, ureg->sirfsoc_int_en_reg)
-				| (uint_en->sirfsoc_rx_timeout_en));
-			} else {
-				wr_regl(port, ureg->sirfsoc_int_en_clr_reg,
-					uint_en->sirfsoc_rx_done_en);
-				wr_regl(port, ureg->sirfsoc_int_en_reg,
-					uint_en->sirfsoc_rx_timeout_en);
-			}
-		} else {
-			if (intr_status & uint_st->sirfsoc_rx_timeout) {
-				if (!sirfport->is_atlas7) {
-					wr_regl(port, ureg->sirfsoc_int_en_reg,
-					rd_regl(port, ureg->sirfsoc_int_en_reg)
-					& ~(uint_en->sirfsoc_rx_timeout_en));
-					wr_regl(port, ureg->sirfsoc_int_en_reg,
-					rd_regl(port, ureg->sirfsoc_int_en_reg)
-					| (uint_en->sirfsoc_rx_done_en));
-				} else {
-					wr_regl(port,
-						ureg->sirfsoc_int_en_clr_reg,
-						uint_en->sirfsoc_rx_timeout_en);
-					wr_regl(port, ureg->sirfsoc_int_en_reg,
-						uint_en->sirfsoc_rx_done_en);
-				}
-			}
-			sirfsoc_uart_pio_rx_chars(port, port->fifosize);
-		}
-	}
-	spin_unlock(&port->lock);
-	tty_flip_buffer_push(&state->port);
-	spin_lock(&port->lock);
-	if (intr_status & uint_st->sirfsoc_txfifo_empty) {
-		if (sirfport->tx_dma_chan)
-			sirfsoc_uart_tx_with_dma(sirfport);
-		else {
-			if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
-				spin_unlock(&port->lock);
-				return IRQ_HANDLED;
-			} else {
-				sirfsoc_uart_pio_tx_chars(sirfport,
-						port->fifosize);
-				if ((uart_circ_empty(xmit)) &&
-				(rd_regl(port, ureg->sirfsoc_tx_fifo_status) &
-				ufifo_st->ff_empty(port)))
-					sirfsoc_uart_stop_tx(port);
-			}
-		}
-	}
-	spin_unlock(&port->lock);
-
-	return IRQ_HANDLED;
-}
-
-static void sirfsoc_uart_rx_dma_complete_callback(void *param)
-{
-}
-
-/* submit rx dma task into dmaengine */
-static void sirfsoc_uart_start_next_rx_dma(struct uart_port *port)
-{
-	struct sirfsoc_uart_port *sirfport = to_sirfport(port);
-	struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
-	struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
-	wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl,
-		rd_regl(port, ureg->sirfsoc_rx_dma_io_ctrl) &
-		~SIRFUART_IO_MODE);
-	sirfport->rx_dma_items.xmit.tail =
-		sirfport->rx_dma_items.xmit.head = 0;
-	sirfport->rx_dma_items.desc =
-		dmaengine_prep_dma_cyclic(sirfport->rx_dma_chan,
-		sirfport->rx_dma_items.dma_addr, SIRFSOC_RX_DMA_BUF_SIZE,
-		SIRFSOC_RX_DMA_BUF_SIZE / 2,
-		DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT);
-	if (IS_ERR_OR_NULL(sirfport->rx_dma_items.desc)) {
-		dev_err(port->dev, "DMA slave single fail\n");
-		return;
-	}
-	sirfport->rx_dma_items.desc->callback =
-		sirfsoc_uart_rx_dma_complete_callback;
-	sirfport->rx_dma_items.desc->callback_param = sirfport;
-	sirfport->rx_dma_items.cookie =
-		dmaengine_submit(sirfport->rx_dma_items.desc);
-	dma_async_issue_pending(sirfport->rx_dma_chan);
-	if (!sirfport->is_atlas7)
-		wr_regl(port, ureg->sirfsoc_int_en_reg,
-				rd_regl(port, ureg->sirfsoc_int_en_reg) |
-				SIRFUART_RX_DMA_INT_EN(uint_en,
-				sirfport->uart_reg->uart_type));
-	else
-		wr_regl(port, ureg->sirfsoc_int_en_reg,
-				SIRFUART_RX_DMA_INT_EN(uint_en,
-				sirfport->uart_reg->uart_type));
-}
-
-static unsigned int
-sirfsoc_usp_calc_sample_div(unsigned long set_rate,
-		unsigned long ioclk_rate, unsigned long *sample_reg)
-{
-	unsigned long min_delta = ~0UL;
-	unsigned short sample_div;
-	unsigned long ioclk_div = 0;
-	unsigned long temp_delta;
-
-	for (sample_div = SIRF_USP_MIN_SAMPLE_DIV;
-			sample_div <= SIRF_MAX_SAMPLE_DIV; sample_div++) {
-		temp_delta = ioclk_rate -
-		(ioclk_rate + (set_rate * sample_div) / 2)
-		/ (set_rate * sample_div) * set_rate * sample_div;
-
-		temp_delta = (temp_delta > 0) ? temp_delta : -temp_delta;
-		if (temp_delta < min_delta) {
-			ioclk_div = (2 * ioclk_rate /
-				(set_rate * sample_div) + 1) / 2 - 1;
-			if (ioclk_div > SIRF_IOCLK_DIV_MAX)
-				continue;
-			min_delta = temp_delta;
-			*sample_reg = sample_div;
-			if (!temp_delta)
-				break;
-		}
-	}
-	return ioclk_div;
-}
-
-static unsigned int
-sirfsoc_uart_calc_sample_div(unsigned long baud_rate,
-			unsigned long ioclk_rate, unsigned long *set_baud)
-{
-	unsigned long min_delta = ~0UL;
-	unsigned short sample_div;
-	unsigned int regv = 0;
-	unsigned long ioclk_div;
-	unsigned long baud_tmp;
-	int temp_delta;
-
-	for (sample_div = SIRF_MIN_SAMPLE_DIV;
-			sample_div <= SIRF_MAX_SAMPLE_DIV; sample_div++) {
-		ioclk_div = (ioclk_rate / (baud_rate * (sample_div + 1))) - 1;
-		if (ioclk_div > SIRF_IOCLK_DIV_MAX)
-			continue;
-		baud_tmp = ioclk_rate / ((ioclk_div + 1) * (sample_div + 1));
-		temp_delta = baud_tmp - baud_rate;
-		temp_delta = (temp_delta > 0) ? temp_delta : -temp_delta;
-		if (temp_delta < min_delta) {
-			regv = regv & (~SIRF_IOCLK_DIV_MASK);
-			regv = regv | ioclk_div;
-			regv = regv & (~SIRF_SAMPLE_DIV_MASK);
-			regv = regv | (sample_div << SIRF_SAMPLE_DIV_SHIFT);
-			min_delta = temp_delta;
-			*set_baud = baud_tmp;
-		}
-	}
-	return regv;
-}
-
-static void sirfsoc_uart_set_termios(struct uart_port *port,
-				       struct ktermios *termios,
-				       struct ktermios *old)
-{
-	struct sirfsoc_uart_port *sirfport = to_sirfport(port);
-	struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
-	struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
-	unsigned long	config_reg = 0;
-	unsigned long	baud_rate;
-	unsigned long	set_baud;
-	unsigned long	flags;
-	unsigned long	ic;
-	unsigned int	clk_div_reg = 0;
-	unsigned long	txfifo_op_reg, ioclk_rate;
-	unsigned long	rx_time_out;
-	int		threshold_div;
-	u32		data_bit_len, stop_bit_len, len_val;
-	unsigned long	sample_div_reg = 0xf;
-	ioclk_rate	= port->uartclk;
-
-	switch (termios->c_cflag & CSIZE) {
-	default:
-	case CS8:
-		data_bit_len = 8;
-		config_reg |= SIRFUART_DATA_BIT_LEN_8;
-		break;
-	case CS7:
-		data_bit_len = 7;
-		config_reg |= SIRFUART_DATA_BIT_LEN_7;
-		break;
-	case CS6:
-		data_bit_len = 6;
-		config_reg |= SIRFUART_DATA_BIT_LEN_6;
-		break;
-	case CS5:
-		data_bit_len = 5;
-		config_reg |= SIRFUART_DATA_BIT_LEN_5;
-		break;
-	}
-	if (termios->c_cflag & CSTOPB) {
-		config_reg |= SIRFUART_STOP_BIT_LEN_2;
-		stop_bit_len = 2;
-	} else
-		stop_bit_len = 1;
-
-	spin_lock_irqsave(&port->lock, flags);
-	port->read_status_mask = uint_en->sirfsoc_rx_oflow_en;
-	port->ignore_status_mask = 0;
-	if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
-		if (termios->c_iflag & INPCK)
-			port->read_status_mask |= uint_en->sirfsoc_frm_err_en |
-				uint_en->sirfsoc_parity_err_en;
-	} else {
-		if (termios->c_iflag & INPCK)
-			port->read_status_mask |= uint_en->sirfsoc_frm_err_en;
-	}
-	if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK))
-			port->read_status_mask |= uint_en->sirfsoc_rxd_brk_en;
-	if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
-		if (termios->c_iflag & IGNPAR)
-			port->ignore_status_mask |=
-				uint_en->sirfsoc_frm_err_en |
-				uint_en->sirfsoc_parity_err_en;
-		if (termios->c_cflag & PARENB) {
-			if (termios->c_cflag & CMSPAR) {
-				if (termios->c_cflag & PARODD)
-					config_reg |= SIRFUART_STICK_BIT_MARK;
-				else
-					config_reg |= SIRFUART_STICK_BIT_SPACE;
-			} else {
-				if (termios->c_cflag & PARODD)
-					config_reg |= SIRFUART_STICK_BIT_ODD;
-				else
-					config_reg |= SIRFUART_STICK_BIT_EVEN;
-			}
-		}
-	} else {
-		if (termios->c_iflag & IGNPAR)
-			port->ignore_status_mask |=
-				uint_en->sirfsoc_frm_err_en;
-		if (termios->c_cflag & PARENB)
-			dev_warn(port->dev,
-					"USP-UART not support parity err\n");
-	}
-	if (termios->c_iflag & IGNBRK) {
-		port->ignore_status_mask |=
-			uint_en->sirfsoc_rxd_brk_en;
-		if (termios->c_iflag & IGNPAR)
-			port->ignore_status_mask |=
-				uint_en->sirfsoc_rx_oflow_en;
-	}
-	if ((termios->c_cflag & CREAD) == 0)
-		port->ignore_status_mask |= SIRFUART_DUMMY_READ;
-	/* Hardware Flow Control Settings */
-	if (UART_ENABLE_MS(port, termios->c_cflag)) {
-		if (!sirfport->ms_enabled)
-			sirfsoc_uart_enable_ms(port);
-	} else {
-		if (sirfport->ms_enabled)
-			sirfsoc_uart_disable_ms(port);
-	}
-	baud_rate = uart_get_baud_rate(port, termios, old, 0, 4000000);
-	if (ioclk_rate == 150000000) {
-		for (ic = 0; ic < SIRF_BAUD_RATE_SUPPORT_NR; ic++)
-			if (baud_rate == baudrate_to_regv[ic].baud_rate)
-				clk_div_reg = baudrate_to_regv[ic].reg_val;
-	}
-	set_baud = baud_rate;
-	if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
-		if (unlikely(clk_div_reg == 0))
-			clk_div_reg = sirfsoc_uart_calc_sample_div(baud_rate,
-					ioclk_rate, &set_baud);
-		wr_regl(port, ureg->sirfsoc_divisor, clk_div_reg);
-	} else {
-		clk_div_reg = sirfsoc_usp_calc_sample_div(baud_rate,
-				ioclk_rate, &sample_div_reg);
-		sample_div_reg--;
-		set_baud = ((ioclk_rate / (clk_div_reg+1) - 1) /
-				(sample_div_reg + 1));
-		/* setting usp mode 2 */
-		len_val = ((1 << SIRFSOC_USP_MODE2_RXD_DELAY_OFFSET) |
-				(1 << SIRFSOC_USP_MODE2_TXD_DELAY_OFFSET));
-		len_val |= ((clk_div_reg & SIRFSOC_USP_MODE2_CLK_DIVISOR_MASK)
-				<< SIRFSOC_USP_MODE2_CLK_DIVISOR_OFFSET);
-		wr_regl(port, ureg->sirfsoc_mode2, len_val);
-	}
-	if (tty_termios_baud_rate(termios))
-		tty_termios_encode_baud_rate(termios, set_baud, set_baud);
-	/* set receive timeout && data bits len */
-	rx_time_out = SIRFSOC_UART_RX_TIMEOUT(set_baud, 20000);
-	rx_time_out = SIRFUART_RECV_TIMEOUT_VALUE(rx_time_out);
-	txfifo_op_reg = rd_regl(port, ureg->sirfsoc_tx_fifo_op);
-	wr_regl(port, ureg->sirfsoc_tx_fifo_op,
-			(txfifo_op_reg & ~SIRFUART_FIFO_START));
-	if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
-		config_reg |= SIRFUART_UART_RECV_TIMEOUT(rx_time_out);
-		wr_regl(port, ureg->sirfsoc_line_ctrl, config_reg);
-	} else {
-		/*tx frame ctrl*/
-		len_val = (data_bit_len - 1) << SIRFSOC_USP_TX_DATA_LEN_OFFSET;
-		len_val |= (data_bit_len + 1 + stop_bit_len - 1) <<
-				SIRFSOC_USP_TX_FRAME_LEN_OFFSET;
-		len_val |= ((data_bit_len - 1) <<
-				SIRFSOC_USP_TX_SHIFTER_LEN_OFFSET);
-		len_val |= (((clk_div_reg & 0xc00) >> 10) <<
-				SIRFSOC_USP_TX_CLK_DIVISOR_OFFSET);
-		wr_regl(port, ureg->sirfsoc_tx_frame_ctrl, len_val);
-		/*rx frame ctrl*/
-		len_val = (data_bit_len - 1) << SIRFSOC_USP_RX_DATA_LEN_OFFSET;
-		len_val |= (data_bit_len + 1 + stop_bit_len - 1) <<
-				SIRFSOC_USP_RX_FRAME_LEN_OFFSET;
-		len_val |= (data_bit_len - 1) <<
-				SIRFSOC_USP_RX_SHIFTER_LEN_OFFSET;
-		len_val |= (((clk_div_reg & 0xf000) >> 12) <<
-				SIRFSOC_USP_RX_CLK_DIVISOR_OFFSET);
-		wr_regl(port, ureg->sirfsoc_rx_frame_ctrl, len_val);
-		/*async param*/
-		wr_regl(port, ureg->sirfsoc_async_param_reg,
-			(SIRFUART_USP_RECV_TIMEOUT(rx_time_out)) |
-			(sample_div_reg & SIRFSOC_USP_ASYNC_DIV2_MASK) <<
-			SIRFSOC_USP_ASYNC_DIV2_OFFSET);
-	}
-	if (sirfport->tx_dma_chan)
-		wr_regl(port, ureg->sirfsoc_tx_dma_io_ctrl, SIRFUART_DMA_MODE);
-	else
-		wr_regl(port, ureg->sirfsoc_tx_dma_io_ctrl, SIRFUART_IO_MODE);
-	if (sirfport->rx_dma_chan)
-		wr_regl(port, ureg->sirfs