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Message-ID: <51076.192.168.10.88.1253639068.squirrel@dbdmail.itg.ti.com>
Date: Tue, 22 Sep 2009 22:34:28 +0530 (IST)
From: "Govindraj.R" <govindraj.raja@...com>
To: linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-serial@...r.kernel.org
Subject: [PATCH 1/3] OMAP UART: Adding support for omap-serial driver.
From: Govindraj R <govindraj.raja@...com>
This patch adds support for OMAP3430-HIGH SPEED UART Controller.
Signed-off-by: Govindraj R <govindraj.raja@...com>
Reviewed-by: Alan Cox <alan@...rguk.ukuu.org.uk>
Reviewed-by: Tony Lindgren <tony@...mide.com>
---
arch/arm/plat-omap/include/mach/omap-serial.h | 156 ++
drivers/serial/Kconfig | 92 +
drivers/serial/Makefile | 1
drivers/serial/omap-serial.c | 1745 ++++++++++++++++++++++++++
4 files changed, 1994 insertions(+)
diff --git a/arch/arm/plat-omap/include/mach/omap-serial.h
b/arch/arm/plat-omap/include/mach/omap-serial.h
new file mode 100644
index 0000000..17b6d17
--- /dev/null
+++ b/arch/arm/plat-omap/include/mach/omap-serial.h
@@ -0,0 +1,156 @@
+/*
+ * arch/arm/plat-omap/include/mach/omap-serial.h
+ *
+ * Driver for OMAP3430 UART controller.
+ *
+ * Copyright (C) 2009 Texas Instruments.
+ *
+ * Authors:
+ * Govindraj R <govindraj.raja@...com>
+ * Thara Gopinath <thara@...com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#ifndef __OMAP_SERIAL_H__
+#define __OMAP_SERIAL_H__
+
+#include <linux/serial_core.h>
+#include <linux/platform_device.h>
+
+#ifdef CONFIG_PM
+#include <../arch/arm/mach-omap2/prm.h>
+#include <../arch/arm/mach-omap2/pm.h>
+#include <../arch/arm/mach-omap2/prm-regbits-34xx.h>
+#include <mach/control.h>
+#endif
+
+/* TI OMAP CONSOLE */
+#define PORT_OMAP 86
+#define DRIVER_NAME "omap-hsuart"
+
+/* tty device name used by omap-serial driver,
+ * in bootargs we specify as console=ttyO0 if uart1
+ * is used as console uart.
+ */
+#define DEVICE_NAME "ttyO"
+
+/*
+ * We default to IRQ0 for the "no irq" hack. Some
+ * machine types want others as well - they're free
+ * to redefine this in their header file.
+ */
+#define is_real_interrupt(irq) ((irq) != 0)
+
+#if defined(CONFIG_SERIAL_OMAP_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
+#define SUPPORT_SYSRQ
+#endif
+
+#ifdef CONFIG_ARCH_OMAP34XX
+#define OMAP_MDR1_DISABLE 0x07
+#define OMAP_MDR1_MODE13X 0x03
+#define OMAP_MDR1_MODE16X 0x00
+#define OMAP_MODE13X_SPEED 230400
+#endif
+
+#define CONSOLE_NAME "console="
+
+#define UART_CLK (48000000)
+#define QUART_CLK (1843200)
+
+#define QUART (0x3)
+
+#define SLEEP_TIMEOUT (5 * HZ)
+#define RX_TIMEOUT (3 * HZ)
+
+struct uart_dma_info {
+ int dma_enabled;
+ int rx_dma_bufsize;
+ int rx_timeout;
+ };
+
+struct omap_uart_state {
+ int clocked;
+ struct clk *ick;
+ struct clk *fck;
+ int num;
+ int can_sleep;
+
+ void __iomem *wk_st;
+ void __iomem *wk_en;
+ u32 wk_mask;
+ u32 padconf;
+
+#ifdef CONFIG_PM
+ struct timer_list timer;
+ u32 timeout;
+ int context_valid;
+ /* Registers to be saved/restored for OFF-mode */
+ u16 dll;
+ u16 dlh;
+ u16 ier;
+ u16 sysc;
+ u16 scr;
+ u16 wer;
+#endif
+};
+
+struct uart_omap_dma {
+ u8 uart_dma_tx;
+ u8 uart_dma_rx;
+ int rx_dma_channel;
+ int tx_dma_channel;
+ /* Physical adress of RX DMA buffer */
+ dma_addr_t rx_buf_dma_phys;
+ /* Physical adress of TX DMA buffer */
+ dma_addr_t tx_buf_dma_phys;
+ /*
+ * Buffer for rx dma.It is not required for tx because the buffer
+ * comes from port structure
+ */
+ unsigned int uart_base;
+ unsigned char *rx_buf;
+ unsigned int prev_rx_dma_pos;
+ int tx_buf_size;
+ int tx_dma_state;
+ int rx_dma_state;
+ spinlock_t tx_lock;
+ spinlock_t rx_lock;
+ /* timer to poll activity on rx dma */
+ struct timer_list rx_timer;
+ int rx_buf_size;
+ int rx_timeout;
+};
+
+struct uart_omap_port {
+ struct uart_port port;
+ struct uart_omap_dma uart_dma;
+ struct platform_device *pdev;
+
+ unsigned char ier;
+ unsigned char lcr;
+ unsigned char mcr;
+ unsigned char fcr;
+ unsigned char efr;
+
+ int use_dma;
+ int is_buf_dma_alloced;
+ /*
+ * Some bits in registers are cleared on a read, so they must
+ * be saved whenever the register is read but the bits will not
+ * be immediately processed.
+ */
+ unsigned int lsr_break_flag;
+#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA
+ unsigned char msr_saved_flags;
+ char name[20];
+ spinlock_t uart_lock;
+ unsigned long port_activity;
+};
+
+extern void omap_uart_idle_init(int num);
+extern char *saved_command_line;
+
+#endif /* __OMAP_SERIAL_H__ */
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 6553833..30f3b27 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -1359,6 +1359,98 @@ config SERIAL_OF_PLATFORM
Currently, only 8250 compatible ports are supported, but
others can easily be added.
+config SERIAL_OMAP
+ bool "OMAP serial port support"
+ depends on ARM && ARCH_OMAP
+ select SERIAL_CORE
+ help
+ If you have a machine based on an Texas Instruments OMAP CPU you
+ can enable its onboard serial ports by enabling this option.
+
+config SERIAL_OMAP_CONSOLE
+ bool "Console on OMAP serial port"
+ depends on SERIAL_OMAP
+ select SERIAL_CORE_CONSOLE
+ help
+ If you have enabled the serial port on the Texas Instruments OMAP
+ CPU you can make it the console by answering Y to this option.
+
+ 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=ttyS0". (Try "man bootparam" or see the documentation of
+ your boot loader (lilo or loadlin) about how to pass options to the
+ kernel at boot time.)
+
+config SERIAL_OMAP_DMA_UART1
+ bool "UART1 DMA support"
+ depends on SERIAL_OMAP
+ help
+ If you have enabled the serial port on the Texas Instruments OMAP
+ CPU you can enable the DMA transfer on UART 1 by answering
+ to this option.
+
+config SERIAL_OMAP_UART1_RXDMA_TIMEOUT
+ int "Timeout value for RX DMA in microseconds"
+ depends on SERIAL_OMAP_DMA_UART1
+ default "1"
+ help
+ Set the timeout value in which you want the data pulled by RX dma to
+ be passed to the tty framework.
+
+config SERIAL_OMAP_UART1_RXDMA_BUFSIZE
+ int "DMA buffer size for RX in bytes"
+ depends on SERIAL_OMAP_DMA_UART1
+ default "4096"
+ help
+ Set the dma buffer size for UART Rx
+
+config SERIAL_OMAP_DMA_UART2
+ bool "UART2 DMA support"
+ depends on SERIAL_OMAP
+ help
+ If you have enabled the serial port on the Texas Instruments OMAP
+ CPU you can enable the DMA transfer on UART 2 by answering
+ to this option.
+
+config SERIAL_OMAP_UART2_RXDMA_TIMEOUT
+ int "Timeout value for RX DMA in microseconds"
+ depends on SERIAL_OMAP_DMA_UART2
+ default "1"
+ help
+ Set the timeout value in which you want the data pulled by RX dma to
+ be passed to the tty framework.
+
+config SERIAL_OMAP_UART2_RXDMA_BUFSIZE
+ int "DMA buffer size for RX in bytes"
+ depends on SERIAL_OMAP_DMA_UART2
+ default "4096"
+ help
+ Set the dma buffer size for UART Rx
+
+config SERIAL_OMAP_DMA_UART3
+ bool "UART3 DMA support"
+ depends on SERIAL_OMAP
+ help
+ If you have enabled the serial port on the Texas Instruments OMAP
+ CPU you can enable the DMA transfer on UART 3 by answering
+ to this option.
+
+config SERIAL_OMAP_UART3_RXDMA_TIMEOUT
+ int "Timeout value for RX DMA in microseconds"
+ depends on SERIAL_OMAP_DMA_UART3
+ default "1"
+ help
+ Set the timeout value in which you want the data pulled by RX dma to
+ be passed to the tty framework.
+
+config SERIAL_OMAP_UART3_RXDMA_BUFSIZE
+ int "DMA buffer size for RX in bytes"
+ depends on SERIAL_OMAP_DMA_UART3
+ default "4096"
+ help
+ Set the dma buffer size for UART Rx
+
config SERIAL_OF_PLATFORM_NWPSERIAL
tristate "NWP serial port driver"
depends on PPC_OF && PPC_DCR
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index d5a2998..db38f2c 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -79,3 +79,4 @@ obj-$(CONFIG_SERIAL_KS8695) += serial_ks8695.o
obj-$(CONFIG_KGDB_SERIAL_CONSOLE) += kgdboc.o
obj-$(CONFIG_SERIAL_QE) += ucc_uart.o
obj-$(CONFIG_SERIAL_TIMBERDALE) += timbuart.o
+obj-$(CONFIG_SERIAL_OMAP) += omap-serial.o
diff --git a/drivers/serial/omap-serial.c b/drivers/serial/omap-serial.c
new file mode 100644
index 0000000..527642f
--- /dev/null
+++ b/drivers/serial/omap-serial.c
@@ -0,0 +1,1745 @@
+/*
+ * drivers/serial/omap-serial.c
+ *
+ * Driver for OMAP3430 UART controller.
+ *
+ * Copyright (C) 2009 Texas Instruments.
+ *
+ * Authors:
+ * Govindraj R <govindraj.raja@...com>
+ * Thara Gopinath <thara@...com>
+ *
+ * PM Framework based on arch/arm/mach-omap2/serial.c
+ * by Kevin Hilman.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/serial_reg.h>
+#include <linux/delay.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/io.h>
+#include <linux/dma-mapping.h>
+#include <linux/clk.h>
+
+#include <asm/irq.h>
+#include <mach/dma.h>
+#include <mach/dmtimer.h>
+#include <mach/omap-serial.h>
+
+static struct uart_omap_port *ui[OMAP_MAX_NR_PORTS];
+static struct omap_uart_state omap_uart[OMAP_MAX_NR_PORTS];
+
+/* Forward declaration of functions */
+static void uart_tx_dma_callback(int lch, u16 ch_status, void *data);
+static void serial_omap_rx_timeout(unsigned long uart_no);
+static void serial_omap_start_rxdma(struct uart_omap_port *up);
+static int serial_omap_remove(struct platform_device *dev);
+
+static inline void omap_uart_block_sleep(int num);
+static void omap_uart_smart_idle_enable(int num, int enable);
+static inline void omap_uart_enable_clocks(int num);
+
+#ifdef DEBUG
+static void serial_omap_display_reg(struct uart_port *port);
+#endif
+
+int console_detect(char *str)
+{
+ char *next, *start = NULL;
+ int i;
+
+ i = strlen(CONSOLE_NAME);
+ next = saved_command_line;
+
+ while ((next = strchr(next, 'c')) != NULL) {
+ if (!strncmp(next, CONSOLE_NAME, i)) {
+ start = next;
+ break;
+ } else {
+ next++;
+ }
+ }
+ if (!start)
+ return -EPERM;
+ i = 0;
+ start = strchr(start, '=') + 1;
+ while (*start != ',') {
+ str[i++] = *start++;
+ if (i > 6) {
+ pr_err("%s : Invalid Console Name\n", __func__);
+ return -EPERM;
+ }
+ }
+ str[i] = '\0';
+ return 0;
+}
+
+static inline unsigned int serial_in(struct uart_omap_port *up, int offset)
+{
+ offset <<= up->port.regshift;
+ if (up->pdev->id != 4)
+ return readb(up->port.membase + offset);
+ else
+ return readw(up->port.membase + offset);
+}
+
+static inline void serial_out(struct uart_omap_port *up, int offset, int value)
+{
+ offset <<= up->port.regshift;
+ if (up->pdev->id != 4)
+ writeb(value, up->port.membase + offset);
+ else
+ writew(value, up->port.membase + offset);
+}
+
+static inline void serial_omap_clear_fifos(struct uart_omap_port *port)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)port;
+ serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO);
+ serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO |
+ UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
+ serial_out(up, UART_FCR, 0);
+}
+
+/*
+ * We have written our own function to get the divisor so as to support
+ * 13x mode.
+ */
+static unsigned int
+serial_omap_get_divisor(struct uart_port *port, unsigned int baud)
+{
+ unsigned int divisor;
+ if (baud > OMAP_MODE13X_SPEED && baud != 3000000)
+ divisor = 13;
+ else
+ divisor = 16;
+ return port->uartclk/(baud * divisor);
+}
+
+static void serial_omap_stop_rxdma(struct uart_omap_port *up)
+{
+ if (up->uart_dma.rx_dma_state) {
+ del_timer_sync(&up->uart_dma.rx_timer);
+ omap_stop_dma(up->uart_dma.rx_dma_channel);
+ omap_free_dma(up->uart_dma.rx_dma_channel);
+ up->uart_dma.rx_dma_channel = 0xFF;
+ up->uart_dma.rx_dma_state = 0x0;
+ }
+}
+
+static void serial_omap_enable_ms(struct uart_port *port)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)port;
+
+ dev_dbg(up->port.dev, "serial_omap_enable_ms+%d\n", up->pdev->id);
+ up->ier |= UART_IER_MSI;
+ serial_out(up, UART_IER, up->ier);
+}
+
+static void serial_omap_stop_tx(struct uart_port *port)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)port;
+ if (up->use_dma) {
+ if (up->uart_dma.tx_dma_channel != 0xFF) {
+ /*
+ * Check if dma is still active . If yes do nothing,
+ * return. Else stop dma
+ */
+ int status = omap_readl(OMAP34XX_DMA4_BASE +
+ OMAP_DMA4_CCR(up->uart_dma.tx_dma_channel));
+ if (status & (1 << 7))
+ return;
+ omap_stop_dma(up->uart_dma.tx_dma_channel);
+ omap_free_dma(up->uart_dma.tx_dma_channel);
+ up->uart_dma.tx_dma_channel = 0xFF;
+ }
+ }
+
+ if (up->ier & UART_IER_THRI) {
+ up->ier &= ~UART_IER_THRI;
+ serial_out(up, UART_IER, up->ier);
+ }
+}
+
+static void serial_omap_stop_rx(struct uart_port *port)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)port;
+ serial_omap_stop_rxdma(up);
+ up->ier &= ~UART_IER_RLSI;
+ up->port.read_status_mask &= ~UART_LSR_DR;
+ serial_out(up, UART_IER, up->ier);
+
+}
+
+static inline void receive_chars(struct uart_omap_port *up, int *status)
+{
+ struct tty_struct *tty = up->port.info->port.tty;
+ unsigned int ch, flag;
+ int max_count = 256;
+
+ do {
+ ch = serial_in(up, UART_RX);
+ flag = TTY_NORMAL;
+ up->port.icount.rx++;
+
+ if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE |
+ UART_LSR_FE | UART_LSR_OE))) {
+ /*
+ * For statistics only
+ */
+ if (*status & UART_LSR_BI) {
+ *status &= ~(UART_LSR_FE | UART_LSR_PE);
+ up->port.icount.brk++;
+ /*
+ * We do the SysRQ and SAK checking
+ * here because otherwise the break
+ * may get masked by ignore_status_mask
+ * or read_status_mask.
+ */
+ if (uart_handle_break(&up->port))
+ goto ignore_char;
+ } else if (*status & UART_LSR_PE)
+ up->port.icount.parity++;
+ else if (*status & UART_LSR_FE)
+ up->port.icount.frame++;
+ if (*status & UART_LSR_OE)
+ up->port.icount.overrun++;
+
+ /*
+ * Mask off conditions which should be ignored.
+ */
+ *status &= up->port.read_status_mask;
+
+#ifdef CONFIG_SERIAL_OMAP_CONSOLE
+ if (up->port.line == up->port.cons->index) {
+ /* Recover the break flag from console xmit */
+ *status |= up->lsr_break_flag;
+ up->lsr_break_flag = 0;
+ }
+#endif
+ if (*status & UART_LSR_BI)
+ flag = TTY_BREAK;
+ else if (*status & UART_LSR_PE)
+ flag = TTY_PARITY;
+ else if (*status & UART_LSR_FE)
+ flag = TTY_FRAME;
+ }
+
+ if (uart_handle_sysrq_char(&up->port, ch))
+ goto ignore_char;
+ uart_insert_char(&up->port, *status, UART_LSR_OE, ch, flag);
+ignore_char:
+ *status = serial_in(up, UART_LSR);
+ } while ((*status & UART_LSR_DR) && (max_count-- > 0));
+ tty_flip_buffer_push(tty);
+}
+
+static void transmit_chars(struct uart_omap_port *up)
+{
+ struct circ_buf *xmit = &up->port.info->xmit;
+ int count;
+
+ if (up->port.x_char) {
+ serial_out(up, UART_TX, up->port.x_char);
+ up->port.icount.tx++;
+ up->port.x_char = 0;
+ return;
+ }
+ if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
+ serial_omap_stop_tx(&up->port);
+ return;
+ }
+
+ count = up->port.fifosize / 4;
+ do {
+ serial_out(up, UART_TX, xmit->buf[xmit->tail]);
+ xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
+ up->port.icount.tx++;
+ if (uart_circ_empty(xmit))
+ break;
+ } while (--count > 0);
+
+ if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+ uart_write_wakeup(&up->port);
+
+ if (uart_circ_empty(xmit))
+ serial_omap_stop_tx(&up->port);
+}
+
+static void serial_omap_start_tx(struct uart_port *port)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)port;
+
+ if (up->use_dma && !(up->port.x_char)) {
+
+ struct circ_buf *xmit = &up->port.info->xmit;
+ unsigned int start = up->uart_dma.tx_buf_dma_phys +
+ (xmit->tail & (UART_XMIT_SIZE - 1));
+ if (uart_circ_empty(xmit) || up->uart_dma.tx_dma_state)
+ return;
+ spin_lock(&(up->uart_dma.tx_lock));
+ up->uart_dma.tx_dma_state = 1;
+ spin_unlock(&(up->uart_dma.tx_lock));
+
+ up->uart_dma.tx_buf_size = uart_circ_chars_pending(xmit);
+ /* It is a circular buffer. See if the buffer has wounded back.
+ * If yes it will have to be transferred in two separate dma
+ * transfers */
+ if (start + up->uart_dma.tx_buf_size >=
+ up->uart_dma.tx_buf_dma_phys + UART_XMIT_SIZE)
+ up->uart_dma.tx_buf_size =
+ (up->uart_dma.tx_buf_dma_phys +
+ UART_XMIT_SIZE) - start;
+
+ if (up->uart_dma.tx_dma_channel == 0xFF)
+ omap_request_dma(up->uart_dma.uart_dma_tx,
+ "UART Tx DMA",
+ (void *)uart_tx_dma_callback, up,
+ &(up->uart_dma.tx_dma_channel));
+ omap_set_dma_dest_params(up->uart_dma.tx_dma_channel, 0,
+ OMAP_DMA_AMODE_CONSTANT,
+ up->uart_dma.uart_base, 0, 0);
+ omap_set_dma_src_params(up->uart_dma.tx_dma_channel, 0,
+ OMAP_DMA_AMODE_POST_INC, start, 0, 0);
+
+ omap_set_dma_transfer_params(up->uart_dma.tx_dma_channel,
+ OMAP_DMA_DATA_TYPE_S8,
+ up->uart_dma.tx_buf_size, 1,
+ OMAP_DMA_SYNC_ELEMENT,
+ up->uart_dma.uart_dma_tx, 0);
+
+ omap_start_dma(up->uart_dma.tx_dma_channel);
+
+ } else if (!(up->ier & UART_IER_THRI)) {
+ up->ier |= UART_IER_THRI;
+ serial_out(up, UART_IER, up->ier);
+ }
+}
+
+static unsigned int check_modem_status(struct uart_omap_port *up)
+{
+ int status;
+ status = serial_in(up, UART_MSR);
+
+ status |= up->msr_saved_flags;
+ up->msr_saved_flags = 0;
+
+ if ((status & UART_MSR_ANY_DELTA) == 0)
+ return status;
+ if (status & UART_MSR_ANY_DELTA && up->ier & UART_IER_MSI &&
+ up->port.info != NULL) {
+ if (status & UART_MSR_TERI)
+ up->port.icount.rng++;
+ if (status & UART_MSR_DDSR)
+ up->port.icount.dsr++;
+ if (status & UART_MSR_DDCD)
+ uart_handle_dcd_change
+ (&up->port, status & UART_MSR_DCD);
+ if (status & UART_MSR_DCTS)
+ uart_handle_cts_change
+ (&up->port, status & UART_MSR_CTS);
+ wake_up_interruptible(&up->port.info->delta_msr_wait);
+ }
+
+ return status;
+}
+
+/*
+ * This handles the interrupt from one port.
+ */
+static inline irqreturn_t serial_omap_irq(int irq, void *dev_id)
+{
+ struct uart_omap_port *up = dev_id;
+ unsigned int iir, lsr;
+
+ omap_uart_block_sleep(up->pdev->id - 1);
+
+ iir = serial_in(up, UART_IIR);
+ if (iir & UART_IIR_NO_INT)
+ return IRQ_NONE;
+
+ lsr = serial_in(up, UART_LSR);
+ if ((iir & 0x4) && up->use_dma) {
+ up->ier &= ~UART_IER_RDI;
+ serial_out(up, UART_IER, up->ier);
+ serial_omap_start_rxdma(up);
+ } else if (lsr & UART_LSR_DR) {
+ receive_chars(up, &lsr);
+ }
+ check_modem_status(up);
+ if ((lsr & UART_LSR_THRE) && (iir & 0x2))
+ transmit_chars(up);
+
+ up->port_activity = jiffies;
+ return IRQ_HANDLED;
+}
+
+static unsigned int serial_omap_tx_empty(struct uart_port *port)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)port;
+ unsigned long flags;
+ unsigned int ret;
+
+ dev_dbg(up->port.dev, "serial_omap_tx_empty+%d\n", up->pdev->id);
+ spin_lock_irqsave(&up->port.lock, flags);
+ ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
+ spin_unlock_irqrestore(&up->port.lock, flags);
+
+ return ret;
+}
+
+static unsigned int serial_omap_get_mctrl(struct uart_port *port)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)port;
+ unsigned char status;
+ unsigned int ret;
+
+ status = check_modem_status(up);
+ dev_dbg(up->port.dev, "serial_omap_get_mctrl+%d\n", up->pdev->id);
+
+ ret = 0;
+ if (status & UART_MSR_DCD)
+ ret |= TIOCM_CAR;
+ if (status & UART_MSR_RI)
+ ret |= TIOCM_RNG;
+ if (status & UART_MSR_DSR)
+ ret |= TIOCM_DSR;
+ if (status & UART_MSR_CTS)
+ ret |= TIOCM_CTS;
+ return ret;
+}
+
+static void serial_omap_set_mctrl(struct uart_port *port, unsigned int mctrl)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)port;
+ unsigned char mcr = 0;
+
+ dev_dbg(up->port.dev, "serial_omap_set_mctrl+%d\n", up->pdev->id);
+ if (mctrl & TIOCM_RTS)
+ mcr |= UART_MCR_RTS;
+ if (mctrl & TIOCM_DTR)
+ mcr |= UART_MCR_DTR;
+ if (mctrl & TIOCM_OUT1)
+ mcr |= UART_MCR_OUT1;
+ if (mctrl & TIOCM_OUT2)
+ mcr |= UART_MCR_OUT2;
+ if (mctrl & TIOCM_LOOP)
+ mcr |= UART_MCR_LOOP;
+
+ mcr |= up->mcr;
+ serial_out(up, UART_MCR, mcr);
+}
+
+static void serial_omap_break_ctl(struct uart_port *port, int break_state)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)port;
+ unsigned long flags;
+
+ dev_dbg(up->port.dev, "serial_omap_break_ctl+%d\n", up->pdev->id);
+ spin_lock_irqsave(&up->port.lock, flags);
+ if (break_state == -1)
+ up->lcr |= UART_LCR_SBC;
+ else
+ up->lcr &= ~UART_LCR_SBC;
+ serial_out(up, UART_LCR, up->lcr);
+ spin_unlock_irqrestore(&up->port.lock, flags);
+}
+
+static int serial_omap_startup(struct uart_port *port)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)port;
+ unsigned long flags;
+ int irq_flags = 0;
+ int retval;
+
+ omap_uart_smart_idle_enable(up->pdev->id - 1, 0);
+
+ if (up->port.flags & UPF_SHARE_IRQ)
+ irq_flags |= IRQF_SHARED;
+
+ /*
+ * Allocate the IRQ
+ */
+ retval = request_irq(up->port.irq, serial_omap_irq, irq_flags,
+ up->name, up);
+ if (retval)
+ return retval;
+
+ dev_dbg(up->port.dev, "serial_omap_startup+%d\n", up->pdev->id);
+
+ /*
+ * Clear the FIFO buffers and disable them.
+ * (they will be reenabled in set_termios())
+ */
+ serial_omap_clear_fifos(up);
+ /* For Hardware flow control */
+ serial_out(up, UART_MCR, 0x2);
+
+ /*
+ * Clear the interrupt registers.
+ */
+ (void) serial_in(up, UART_LSR);
+ (void) serial_in(up, UART_RX);
+ (void) serial_in(up, UART_IIR);
+ (void) serial_in(up, UART_MSR);
+
+ /*
+ * Now, initialize the UART
+ */
+ serial_out(up, UART_LCR, UART_LCR_WLEN8);
+ spin_lock_irqsave(&up->port.lock, flags);
+ if (up->port.flags & UPF_FOURPORT) {
+ if (!is_real_interrupt(up->port.irq))
+ up->port.mctrl |= TIOCM_OUT1;
+ } else {
+ /*
+ * Most PC uarts need OUT2 raised to enable interrupts.
+ */
+ if (is_real_interrupt(up->port.irq))
+ up->port.mctrl |= TIOCM_OUT2;
+ }
+ serial_omap_set_mctrl(&up->port, up->port.mctrl);
+ spin_unlock_irqrestore(&up->port.lock, flags);
+
+ up->msr_saved_flags = 0;
+
+ if (up->port.flags & UPF_FOURPORT) {
+ unsigned int icp;
+ /*
+ * Enable interrupts on the AST Fourport board
+ */
+ icp = (up->port.iobase & 0xfe0) | 0x01f;
+ outb_p(0x80, icp);
+ (void) inb_p(icp);
+ }
+
+ if (up->use_dma) {
+ if (!up->is_buf_dma_alloced) {
+ free_page((unsigned long)up->port.info->xmit.buf);
+ up->port.info->xmit.buf = NULL;
+ up->port.info->xmit.buf = dma_alloc_coherent(NULL,
+ UART_XMIT_SIZE,
+ (dma_addr_t *)&(up->uart_dma.tx_buf_dma_phys),
+ 0);
+ up->is_buf_dma_alloced = 1;
+ }
+ init_timer(&(up->uart_dma.rx_timer));
+ up->uart_dma.rx_timer.function = serial_omap_rx_timeout;
+ up->uart_dma.rx_timer.data = up->pdev->id;
+ /* Currently the buffer size is 4KB. Can increase it */
+ up->uart_dma.rx_buf = dma_alloc_coherent(NULL,
+ up->uart_dma.rx_buf_size,
+ (dma_addr_t *)&(up->uart_dma.rx_buf_dma_phys), 0);
+ }
+
+ /*
+ * Finally, enable interrupts. Note: Modem status interrupts
+ * are set via set_termios(), which will be occurring imminently
+ * anyway, so we don't enable them here.
+ */
+ up->ier = UART_IER_RLSI | UART_IER_RDI;
+ serial_out(up, UART_IER, up->ier);
+
+ up->port_activity = jiffies;
+ return 0;
+}
+
+static void serial_omap_shutdown(struct uart_port *port)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)port;
+ unsigned long flags;
+
+ dev_dbg(up->port.dev, "serial_omap_shutdown+%d\n", up->pdev->id);
+ /*
+ * Disable interrupts from this port
+ */
+ up->ier = 0;
+ serial_out(up, UART_IER, 0);
+
+ spin_lock_irqsave(&up->port.lock, flags);
+ if (up->port.flags & UPF_FOURPORT) {
+ /* reset interrupts on the AST Fourport board */
+ inb((up->port.iobase & 0xfe0) | 0x1f);
+ up->port.mctrl |= TIOCM_OUT1;
+ } else
+ up->port.mctrl &= ~TIOCM_OUT2;
+ serial_omap_set_mctrl(&up->port, up->port.mctrl);
+ spin_unlock_irqrestore(&up->port.lock, flags);
+
+ /*
+ * Disable break condition and FIFOs
+ */
+ serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC);
+ serial_omap_clear_fifos(up);
+
+ /*
+ * Read data port to reset things, and then free the irq
+ */
+ (void) serial_in(up, UART_RX);
+ if (up->use_dma) {
+ int tmp;
+ if (up->is_buf_dma_alloced) {
+ dma_free_coherent(up->port.dev,
+ UART_XMIT_SIZE,
+ up->port.info->xmit.buf,
+ up->uart_dma.tx_buf_dma_phys);
+ up->port.info->xmit.buf = NULL;
+ up->is_buf_dma_alloced = 0;
+ }
+ serial_omap_stop_rx(port);
+ dma_free_coherent(up->port.dev,
+ up->uart_dma.rx_buf_size,
+ up->uart_dma.rx_buf,
+ up->uart_dma.rx_buf_dma_phys);
+ up->uart_dma.rx_buf = NULL;
+ tmp = serial_in(up, UART_OMAP_SYSC) & 0x7;
+ serial_out(up, UART_OMAP_SYSC, tmp); /* force-idle */
+ }
+
+ free_irq(up->port.irq, up);
+}
+
+static inline void
+serial_omap_configure_xonxoff
+ (struct uart_omap_port *up, struct ktermios *termios)
+{
+ unsigned char efr = 0;
+
+ up->lcr = serial_in(up, UART_LCR);
+ serial_out(up, UART_LCR, 0xbf);
+ up->efr = serial_in(up, UART_EFR);
+ serial_out(up, UART_EFR, up->efr & ~UART_EFR_ECB);
+
+ serial_out(up, UART_XON1, termios->c_cc[VSTART]);
+ serial_out(up, UART_XOFF1, termios->c_cc[VSTOP]);
+
+ /* IXON Flag:
+ * Enable XON/XOFF flow control on output.
+ * Transmit XON1, XOFF1
+ */
+ if (termios->c_iflag & IXON)
+ efr |= 0x01 << 3;
+
+ /* IXOFF Flag:
+ * Enable XON/XOFF flow control on input.
+ * Receiver compares XON1, XOFF1.
+ */
+ if (termios->c_iflag & IXOFF)
+ efr |= 0x01 << 1;
+
+ serial_out(up, UART_EFR, up->efr | UART_EFR_ECB);
+ serial_out(up, UART_LCR, 0x80);
+
+ up->mcr = serial_in(up, UART_MCR);
+
+ /* IXANY Flag:
+ * Enable any character to restart output.
+ * Operation resumes after receiving any
+ * character after recognition of the XOFF character
+ */
+ if (termios->c_iflag & IXANY)
+ up->mcr |= 1<<5;
+
+ serial_out(up, UART_MCR, up->mcr | 1<<6);
+
+ serial_out(up, UART_LCR, 0xbf);
+ serial_out(up, UART_TI752_TCR, 0x0f);
+ /* Enable special char function UARTi.EFR_REG[5] and
+ * load the new software flow control mode IXON or IXOFF
+ * and restore the UARTi.EFR_REG[4] ENHANCED_EN value.
+ */
+ serial_out(up, UART_EFR, up->efr | efr | 1<<5);
+ serial_out(up, UART_LCR, 0x80);
+
+ serial_out(up, UART_MCR, up->mcr & ~(1<<6));
+ serial_out(up, UART_LCR, up->lcr);
+}
+
+static void
+serial_omap_set_termios(struct uart_port *port, struct ktermios *termios,
+ struct ktermios *old)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)port;
+ unsigned char cval;
+ unsigned char efr = 0;
+ unsigned long flags;
+ unsigned int baud, quot;
+
+ switch (termios->c_cflag & CSIZE) {
+ case CS5:
+ cval = UART_LCR_WLEN5;
+ break;
+ case CS6:
+ cval = UART_LCR_WLEN6;
+ break;
+ case CS7:
+ cval = UART_LCR_WLEN7;
+ break;
+ default:
+ case CS8:
+ cval = UART_LCR_WLEN8;
+ break;
+ }
+
+ if (termios->c_cflag & CSTOPB)
+ cval |= UART_LCR_STOP;
+ if (termios->c_cflag & PARENB)
+ cval |= UART_LCR_PARITY;
+ if (!(termios->c_cflag & PARODD))
+ cval |= UART_LCR_EPAR;
+
+ /*
+ * Ask the core to calculate the divisor for us.
+ */
+
+ baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/13);
+ quot = serial_omap_get_divisor(port, baud);
+
+ if (up->use_dma)
+ up->fcr = UART_FCR_ENABLE_FIFO
+ | 0x1 << 6 | 0x1 << 4
+ | UART_FCR_DMA_SELECT;
+ else
+ up->fcr = UART_FCR_ENABLE_FIFO
+ | 0x1 << 6 | 0x1 << 4;
+
+ /*
+ * Ok, we're now changing the port state. Do it with
+ * interrupts disabled.
+ */
+ spin_lock_irqsave(&up->port.lock, flags);
+
+ /*
+ * Update the per-port timeout.
+ */
+ uart_update_timeout(port, termios->c_cflag, baud);
+
+ up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
+ if (termios->c_iflag & INPCK)
+ up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
+ if (termios->c_iflag & (BRKINT | PARMRK))
+ up->port.read_status_mask |= UART_LSR_BI;
+
+ /*
+ * Characters to ignore
+ */
+ up->port.ignore_status_mask = 0;
+ if (termios->c_iflag & IGNPAR)
+ up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
+ if (termios->c_iflag & IGNBRK) {
+ up->port.ignore_status_mask |= UART_LSR_BI;
+ /*
+ * If we're ignoring parity and break indicators,
+ * ignore overruns too (for real raw support).
+ */
+ if (termios->c_iflag & IGNPAR)
+ up->port.ignore_status_mask |= UART_LSR_OE;
+ }
+
+ /*
+ * ignore all characters if CREAD is not set
+ */
+ if ((termios->c_cflag & CREAD) == 0)
+ up->port.ignore_status_mask |= UART_LSR_DR;
+
+ /*
+ * Modem status interrupts
+ */
+ up->ier &= ~UART_IER_MSI;
+ if (UART_ENABLE_MS(&up->port, termios->c_cflag))
+ up->ier |= UART_IER_MSI;
+ serial_out(up, UART_IER, up->ier);
+ serial_out(up, UART_LCR, cval); /* reset DLAB */
+
+ /*-----------FIFOs and DMA Settings -----------*/
+ serial_out(up, UART_LCR, UART_LCR_DLAB);
+ serial_out(up, UART_DLL, 0);
+ serial_out(up, UART_DLM, 0);
+ serial_out(up, UART_LCR, 0);
+
+ serial_out(up, UART_LCR, 0xbf);
+
+ up->efr = serial_in(up, UART_EFR);
+ serial_out(up, UART_EFR, up->efr | UART_EFR_ECB);
+ serial_out(up, UART_LCR, 0x0); /* Access FCR */
+
+ up->mcr = serial_in(up, UART_MCR);
+ serial_out(up, UART_MCR, up->mcr | 0x40); /* Access TLR*/
+ /* FIFO ENABLE, DMA MODE */
+ serial_out(up, UART_FCR, up->fcr);
+ serial_out(up, UART_LCR, 0xbf); /* Access EFR */
+
+ if (up->use_dma) {
+ serial_out(up, UART_TI752_TLR, 0x00);
+ serial_out(up, UART_OMAP_SCR, ((1 << 6) | (1 << 7)));
+ }
+
+ serial_out(up, UART_EFR, up->efr);
+ serial_out(up, UART_LCR, 0x80);
+ serial_out(up, UART_MCR, up->mcr); /* Restore TLR */
+
+ /*-----Protocol, Baud Rate, and Interrupt Settings -- */
+
+ serial_out(up, UART_OMAP_MDR1, OMAP_MDR1_DISABLE);
+
+ serial_out(up, UART_LCR, 0xbf); /* Access EFR */
+
+ up->efr = serial_in(up, UART_EFR);
+ serial_out(up, UART_EFR, up->efr | UART_EFR_ECB);
+
+ serial_out(up, UART_LCR, 0);
+ serial_out(up, UART_IER, 0);
+ serial_out(up, UART_LCR, 0xbf);
+
+ serial_out(up, UART_DLL, quot & 0xff); /* LS of divisor */
+ serial_out(up, UART_DLM, quot >> 8); /* MS of divisor */
+
+ serial_out(up, UART_LCR, 0);
+ serial_out(up, UART_IER, up->ier);
+ serial_out(up, UART_LCR, 0xbf); /* Access EFR */
+
+ serial_out(up, UART_EFR, up->efr);
+ serial_out(up, UART_LCR, cval);
+
+ if (baud > 230400 && baud != 3000000)
+ serial_out(up, UART_OMAP_MDR1, OMAP_MDR1_MODE13X);
+ else
+ serial_out(up, UART_OMAP_MDR1, OMAP_MDR1_MODE16X);
+
+ /* Hardware Flow Control Configuration */
+
+ if (termios->c_cflag & CRTSCTS) {
+ efr |= (UART_EFR_CTS | UART_EFR_RTS);
+ serial_out(up, UART_LCR, 0x80);
+
+ up->mcr = serial_in(up, UART_MCR);
+ serial_out(up, UART_MCR, up->mcr | 0x40);
+
+ serial_out(up, UART_LCR, 0xbf); /* Access EFR */
+
+ up->efr = serial_in(up, UART_EFR);
+ serial_out(up, UART_EFR, up->efr | UART_EFR_ECB);
+
+ serial_out(up, UART_TI752_TCR, 0x0f);
+ serial_out(up, UART_EFR, efr); /* Enable AUTORTS and AUTOCTS */
+ serial_out(up, UART_LCR, 0x80);
+ serial_out(up, UART_MCR, up->mcr | 0x02);
+ serial_out(up, UART_LCR, cval);
+ }
+
+ serial_omap_set_mctrl(&up->port, up->port.mctrl);
+ /* ----Software Flow Control Configuration----- */
+ if (termios->c_iflag & (IXON | IXOFF))
+ serial_omap_configure_xonxoff(up, termios);
+
+ spin_unlock_irqrestore(&up->port.lock, flags);
+ dev_dbg(up->port.dev, "serial_omap_set_termios+%d\n", up->pdev->id);
+
+#ifdef DEBUG
+ serial_omap_display_reg(port);
+#endif
+}
+
+static void
+serial_omap_pm(struct uart_port *port, unsigned int state,
+ unsigned int oldstate)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)port;
+ unsigned char efr;
+ dev_dbg(up->port.dev, "serial_omap_pm+%d\n", up->pdev->id);
+ efr = serial_in(up, UART_EFR);
+ serial_out(up, UART_LCR, 0xBF);
+ serial_out(up, UART_EFR, efr | UART_EFR_ECB);
+ serial_out(up, UART_LCR, 0);
+
+ serial_out(up, UART_IER, (state != 0) ? UART_IERX_SLEEP : 0);
+ serial_out(up, UART_LCR, 0xBF);
+ serial_out(up, UART_EFR, efr);
+ serial_out(up, UART_LCR, 0);
+}
+
+static void serial_omap_release_port(struct uart_port *port)
+{
+ dev_dbg(port->dev, "serial_omap_release_port+\n");
+}
+
+static int serial_omap_request_port(struct uart_port *port)
+{
+ dev_dbg(port->dev, "serial_omap_request_port+\n");
+ return 0;
+}
+
+static void serial_omap_config_port(struct uart_port *port, int flags)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)port;
+
+ dev_dbg(up->port.dev, "serial_omap_config_port+%d\n",
+ up->pdev->id);
+ up->port.type = PORT_OMAP;
+}
+
+static int
+serial_omap_verify_port(struct uart_port *port, struct serial_struct *ser)
+{
+ /* we don't want the core code to modify any port params */
+ dev_dbg(port->dev, "serial_omap_verify_port+\n");
+ return -EINVAL;
+}
+
+static const char *
+serial_omap_type(struct uart_port *port)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)port;
+
+ dev_dbg(up->port.dev, "serial_omap_type+%d\n", up->pdev->id);
+ return up->name;
+}
+
+#ifdef CONFIG_SERIAL_OMAP_CONSOLE
+
+static struct uart_omap_port *serial_omap_console_ports[4];
+
+static struct uart_driver serial_omap_reg;
+
+#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
+
+/*
+ * Wait for transmitter & holding register to empty
+ */
+static inline void wait_for_xmitr(struct uart_omap_port *up)
+{
+ unsigned int status, tmout = 10000;
+
+ /* Wait up to 10ms for the character(s) to be sent. */
+ do {
+ status = serial_in(up, UART_LSR);
+
+ if (status & UART_LSR_BI)
+ up->lsr_break_flag = UART_LSR_BI;
+
+ if (--tmout == 0)
+ break;
+ udelay(1);
+ } while ((status & BOTH_EMPTY) != BOTH_EMPTY);
+
+ /* Wait up to 1s for flow control if necessary */
+ if (up->port.flags & UPF_CONS_FLOW) {
+ tmout = 1000000;
+ for (tmout = 1000000; tmout; tmout--) {
+ unsigned int msr = serial_in(up, UART_MSR);
+ up->msr_saved_flags |= msr & MSR_SAVE_FLAGS;
+ if (msr & UART_MSR_CTS)
+ break;
+ udelay(1);
+ }
+ }
+}
+
+static void serial_omap_console_putchar(struct uart_port *port, int ch)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)port;
+
+ wait_for_xmitr(up);
+ serial_out(up, UART_TX, ch);
+}
+
+/*
+ * Print a string to the serial port trying not to disturb
+ * any possible real use of the port...
+ *
+ * The console_lock must be held when we get here.
+ */
+static void
+serial_omap_console_write(struct console *co, const char *s,
+ unsigned int count)
+{
+ struct uart_omap_port *up = serial_omap_console_ports[co->index];
+ unsigned int ier;
+
+ /*
+ * First save the IER then disable the interrupts
+ */
+ ier = serial_in(up, UART_IER);
+ serial_out(up, UART_IER, 0);
+
+ uart_console_write(&up->port, s, count, serial_omap_console_putchar);
+
+ /*
+ * Finally, wait for transmitter to become empty
+ * and restore the IER
+ */
+ wait_for_xmitr(up);
+ serial_out(up, UART_IER, ier);
+ /*
+ * The receive handling will happen properly because the
+ * receive ready bit will still be set; it is not cleared
+ * on read. However, modem control will not, we must
+ * call it if we have saved something in the saved flags
+ * while processing with interrupts off.
+ */
+ if (up->msr_saved_flags)
+ check_modem_status(up);
+}
+
+static int __init
+serial_omap_console_setup(struct console *co, char *options)
+{
+ struct uart_omap_port *up;
+ int baud = 9600;
+ int bits = 8;
+ int parity = 'n';
+ int flow = 'n';
+ int r;
+
+ if (serial_omap_console_ports[co->index] == NULL)
+ return -ENODEV;
+ up = serial_omap_console_ports[co->index];
+
+ if (options)
+ uart_parse_options(options, &baud, &parity, &bits, &flow);
+
+ r = uart_set_options(&up->port, co, baud, parity, bits, flow);
+
+ return r;
+}
+
+static struct console serial_omap_console = {
+ .name = DEVICE_NAME,
+ .write = serial_omap_console_write,
+ .device = uart_console_device,
+ .setup = serial_omap_console_setup,
+ .flags = CON_PRINTBUFFER,
+ .index = -1,
+ .data = &serial_omap_reg,
+};
+
+static void serial_omap_add_console_port(struct uart_omap_port *up)
+{
+ serial_omap_console_ports[up->pdev->id - 1] = up;
+}
+
+#define OMAP_CONSOLE (&serial_omap_console)
+
+#else
+
+#define OMAP_CONSOLE NULL
+
+static inline void serial_omap_add_console_port(struct uart_omap_port *up) {}
+
+#endif
+
+struct uart_ops serial_omap_pops = {
+ .tx_empty = serial_omap_tx_empty,
+ .set_mctrl = serial_omap_set_mctrl,
+ .get_mctrl = serial_omap_get_mctrl,
+ .stop_tx = serial_omap_stop_tx,
+ .start_tx = serial_omap_start_tx,
+ .stop_rx = serial_omap_stop_rx,
+ .enable_ms = serial_omap_enable_ms,
+ .break_ctl = serial_omap_break_ctl,
+ .startup = serial_omap_startup,
+ .shutdown = serial_omap_shutdown,
+ .set_termios = serial_omap_set_termios,
+ .pm = serial_omap_pm,
+ .type = serial_omap_type,
+ .release_port = serial_omap_release_port,
+ .request_port = serial_omap_request_port,
+ .config_port = serial_omap_config_port,
+ .verify_port = serial_omap_verify_port,
+};
+
+static struct uart_driver serial_omap_reg = {
+ .owner = THIS_MODULE,
+ .driver_name = "OMAP-SERIAL",
+ .dev_name = DEVICE_NAME,
+ .major = TTY_MAJOR,
+ .minor = 64,
+ .nr = OMAP_MAX_NR_PORTS,
+ .cons = OMAP_CONSOLE,
+};
+
+static
+int serial_omap_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct uart_omap_port *up = platform_get_drvdata(pdev);
+
+ if (up)
+ uart_suspend_port(&serial_omap_reg, &up->port);
+ return 0;
+}
+
+static int serial_omap_resume(struct platform_device *dev)
+{
+ struct uart_omap_port *up = platform_get_drvdata(dev);
+ if (up)
+ uart_resume_port(&serial_omap_reg, &up->port);
+ return 0;
+}
+
+static void serial_omap_rx_timeout(unsigned long uart_no)
+{
+ struct uart_omap_port *up = ui[uart_no - 1];
+ unsigned int curr_dma_pos;
+ curr_dma_pos = omap_readl(OMAP34XX_DMA4_BASE +
+ OMAP_DMA4_CDAC(up->uart_dma.rx_dma_channel));
+ if ((curr_dma_pos == up->uart_dma.prev_rx_dma_pos) ||
+ (curr_dma_pos == 0)) {
+ if (jiffies_to_msecs(jiffies - up->port_activity) <
+ RX_TIMEOUT) {
+ mod_timer(&up->uart_dma.rx_timer, jiffies +
+ usecs_to_jiffies(up->uart_dma.rx_timeout));
+ } else {
+ serial_omap_stop_rxdma(up);
+ up->ier |= UART_IER_RDI;
+ serial_out(up, UART_IER, up->ier);
+ }
+ return;
+ } else {
+ unsigned int curr_transmitted_size = curr_dma_pos -
+ up->uart_dma.prev_rx_dma_pos;
+ up->port.icount.rx += curr_transmitted_size;
+ tty_insert_flip_string(up->port.info->port.tty,
+ up->uart_dma.rx_buf +
+ (up->uart_dma.prev_rx_dma_pos -
+ up->uart_dma.rx_buf_dma_phys),
+ curr_transmitted_size);
+ tty_flip_buffer_push(up->port.info->port.tty);
+ up->uart_dma.prev_rx_dma_pos = curr_dma_pos;
+ if (up->uart_dma.rx_buf_size +
+ up->uart_dma.rx_buf_dma_phys == curr_dma_pos)
+ serial_omap_start_rxdma(up);
+ else
+ mod_timer(&up->uart_dma.rx_timer, jiffies +
+ usecs_to_jiffies(up->uart_dma.rx_timeout));
+ up->port_activity = jiffies;
+ }
+}
+
+static void uart_rx_dma_callback(int lch, u16 ch_status, void *data)
+{
+ return;
+}
+
+static void serial_omap_start_rxdma(struct uart_omap_port *up)
+{
+ if (up->uart_dma.rx_dma_channel == 0xFF) {
+ omap_request_dma(up->uart_dma.uart_dma_rx, "UART Rx DMA",
+ (void *)uart_rx_dma_callback, up,
+ &(up->uart_dma.rx_dma_channel));
+
+ omap_set_dma_src_params(up->uart_dma.rx_dma_channel, 0,
+ OMAP_DMA_AMODE_CONSTANT,
+ up->uart_dma.uart_base, 0, 0);
+ omap_set_dma_dest_params(up->uart_dma.rx_dma_channel, 0,
+ OMAP_DMA_AMODE_POST_INC,
+ up->uart_dma.rx_buf_dma_phys, 0, 0);
+ omap_set_dma_transfer_params(up->uart_dma.rx_dma_channel,
+ OMAP_DMA_DATA_TYPE_S8,
+ up->uart_dma.rx_buf_size, 1,
+ OMAP_DMA_SYNC_ELEMENT,
+ up->uart_dma.uart_dma_rx, 0);
+ }
+ up->uart_dma.prev_rx_dma_pos = up->uart_dma.rx_buf_dma_phys;
+ omap_writel(0, OMAP34XX_DMA4_BASE
+ + OMAP_DMA4_CDAC(up->uart_dma.rx_dma_channel));
+ omap_start_dma(up->uart_dma.rx_dma_channel);
+ mod_timer(&up->uart_dma.rx_timer, jiffies +
+ usecs_to_jiffies(up->uart_dma.rx_timeout));
+ up->uart_dma.rx_dma_state = 1;
+}
+
+static void serial_omap_continue_tx(struct uart_omap_port *up)
+{
+ struct circ_buf *xmit = &up->port.info->xmit;
+ int start = up->uart_dma.tx_buf_dma_phys
+ + (xmit->tail & (UART_XMIT_SIZE - 1));
+ if (uart_circ_empty(xmit))
+ return;
+
+ up->uart_dma.tx_buf_size = uart_circ_chars_pending(xmit);
+ /* It is a circular buffer. See if the buffer has wounded back.
+ * If yes it will have to be transferred in two separate dma
+ * transfers
+ */
+ if (start + up->uart_dma.tx_buf_size >=
+ up->uart_dma.tx_buf_dma_phys + UART_XMIT_SIZE)
+ up->uart_dma.tx_buf_size =
+ (up->uart_dma.tx_buf_dma_phys + UART_XMIT_SIZE) - start;
+ omap_set_dma_dest_params(up->uart_dma.tx_dma_channel, 0,
+ OMAP_DMA_AMODE_CONSTANT,
+ up->uart_dma.uart_base, 0, 0);
+ omap_set_dma_src_params(up->uart_dma.tx_dma_channel, 0,
+ OMAP_DMA_AMODE_POST_INC, start, 0, 0);
+
+ omap_set_dma_transfer_params(up->uart_dma.tx_dma_channel,
+ OMAP_DMA_DATA_TYPE_S8,
+ up->uart_dma.tx_buf_size, 1,
+ OMAP_DMA_SYNC_ELEMENT,
+ up->uart_dma.uart_dma_tx, 0);
+
+ omap_start_dma(up->uart_dma.tx_dma_channel);
+}
+
+static void uart_tx_dma_callback(int lch, u16 ch_status, void *data)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)data;
+ struct circ_buf *xmit = &up->port.info->xmit;
+ xmit->tail = (xmit->tail + up->uart_dma.tx_buf_size) & \
+ (UART_XMIT_SIZE - 1);
+ up->port.icount.tx += up->uart_dma.tx_buf_size;
+
+ if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+ uart_write_wakeup(&up->port);
+
+ if (uart_circ_empty(xmit)) {
+ spin_lock(&(up->uart_dma.tx_lock));
+ serial_omap_stop_tx(&up->port);
+ up->uart_dma.tx_dma_state = 0;
+ spin_unlock(&(up->uart_dma.tx_lock));
+ } else {
+ omap_stop_dma(up->uart_dma.tx_dma_channel);
+ serial_omap_continue_tx(up);
+ }
+ up->port_activity = jiffies;
+ return;
+}
+
+static int serial_omap_probe(struct platform_device *pdev)
+{
+ struct uart_omap_port *up;
+ struct resource *mem, *irq, *dma_tx, *dma_rx;
+ struct uart_dma_info *up_dma = pdev->dev.platform_data;
+ int ret = -ENOSPC;
+ char str[7];
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!mem) {
+ dev_err(&pdev->dev, "no mem resource?\n");
+ return -ENODEV;
+ }
+ irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!irq) {
+ dev_err(&pdev->dev, "no irq resource?\n");
+ return -ENODEV;
+ }
+
+ ret = (int) request_mem_region(mem->start, (mem->end - mem->start) + 1,
+ pdev->dev.driver->name);
+ if (!ret) {
+ dev_err(&pdev->dev, "memory region already claimed\n");
+ return -EBUSY;
+ }
+
+ dma_tx = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+ if (!dma_tx) {
+ ret = -EINVAL;
+ goto err;
+ }
+
+ dma_rx = platform_get_resource(pdev, IORESOURCE_DMA, 1);
+ if (!dma_rx) {
+ ret = -EINVAL;
+ goto err;
+ }
+
+ up = kzalloc(sizeof(*up), GFP_KERNEL);
+ if (up == NULL) {
+ ret = -ENOMEM;
+ goto do_release_region;
+ }
+ sprintf(up->name, "OMAP UART%d", pdev->id);
+ up->pdev = pdev;
+ up->port.dev = &pdev->dev;
+ up->port.type = PORT_OMAP;
+ up->port.iotype = UPIO_MEM;
+ up->port.mapbase = mem->start;
+ up->port.irq = irq->start;
+
+ up->uart_dma.uart_dma_tx = dma_tx->start;
+ up->uart_dma.uart_dma_rx = dma_rx->start;
+ up->uart_dma.uart_base = mem->start;
+
+ up->port.fifosize = 64;
+ up->port.ops = &serial_omap_pops;
+ up->port.line = pdev->id - 1;
+ if ((pdev->id - 1) == QUART) {
+ up->port.membase = ioremap_nocache(mem->start, 0x16 << 1);
+ up->port.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP;
+ up->port.uartclk = QUART_CLK;
+ up->port.regshift = 1;
+ } else {
+ up->port.membase = (void *) OMAP2_IO_ADDRESS(mem->start);
+ up->port.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
+ up->port.uartclk = UART_CLK;
+ up->port.regshift = 2;
+ }
+
+ if (up_dma->dma_enabled) {
+ up->use_dma = 1;
+ up->uart_dma.rx_buf_size = up_dma->rx_dma_bufsize;
+ up->uart_dma.rx_timeout = up_dma->rx_timeout;
+ }
+
+ if (up->use_dma) {
+ spin_lock_init(&(up->uart_dma.tx_lock));
+ spin_lock_init(&(up->uart_dma.rx_lock));
+ up->uart_dma.tx_dma_channel = 0xFF;
+ up->uart_dma.rx_dma_channel = 0xFF;
+ }
+ if (console_detect(str)) {
+ pr_err("\n %s: Invalid console paramter...\n", __func__);
+ pr_err("\n %s: UART Driver Init Failed!\n", __func__);
+ return -EPERM;
+ }
+ ui[pdev->id - 1] = up;
+ serial_omap_add_console_port(up);
+
+ ret = uart_add_one_port(&serial_omap_reg, &up->port);
+ if (ret != 0)
+ goto do_release_region;
+
+ platform_set_drvdata(pdev, up);
+ return 0;
+err:
+ dev_err(&pdev->dev, "[UART%d]: failure [%s]\n",
+ pdev->id, __func__);
+do_release_region:
+ release_mem_region(mem->start, (mem->end - mem->start) + 1);
+ return ret;
+}
+
+static int serial_omap_remove(struct platform_device *dev)
+{
+ struct uart_omap_port *up = platform_get_drvdata(dev);
+ platform_set_drvdata(dev, NULL);
+ if (up) {
+ uart_remove_one_port(&serial_omap_reg, &up->port);
+ kfree(up);
+ }
+ return 0;
+}
+
+static struct platform_driver serial_omap_driver = {
+ .probe = serial_omap_probe,
+ .remove = serial_omap_remove,
+
+ .suspend = serial_omap_suspend,
+ .resume = serial_omap_resume,
+ .driver = {
+ .name = "omap-uart",
+ },
+};
+
+int __init serial_omap_init(void)
+{
+ int ret;
+
+ ret = uart_register_driver(&serial_omap_reg);
+ if (ret != 0)
+ return ret;
+ ret = platform_driver_register(&serial_omap_driver);
+ if (ret != 0)
+ uart_unregister_driver(&serial_omap_reg);
+ return ret;
+}
+
+void __exit serial_omap_exit(void)
+{
+ platform_driver_unregister(&serial_omap_driver);
+ uart_unregister_driver(&serial_omap_reg);
+}
+
+#ifdef CONFIG_PM
+static void omap_uart_save_context(int num)
+{
+ struct omap_uart_state *uart = &omap_uart[num];
+ struct uart_omap_port *up = ui[num];
+
+ u16 lcr = 0;
+ lcr = serial_in(up, UART_LCR);
+ serial_out(up, UART_LCR, 0xBF);
+ uart->dll = serial_in(up, UART_DLL);
+ uart->dlh = serial_in(up, UART_DLM);
+ serial_out(up, UART_LCR, lcr);
+ uart->ier = serial_in(up, UART_IER);
+ uart->sysc = serial_in(up, UART_OMAP_SYSC);
+ uart->scr = serial_in(up, UART_OMAP_SCR);
+ uart->wer = serial_in(up, UART_OMAP_WER);
+
+ uart->context_valid = 1;
+}
+
+static void omap_uart_restore_context(int num)
+{
+ struct omap_uart_state *uart = &omap_uart[num];
+ struct uart_omap_port *up = ui[num];
+ u16 efr = 0;
+
+ if (!uart->context_valid)
+ return;
+
+ uart->context_valid = 0;
+
+ serial_out(up, UART_OMAP_MDR1, 0x7);
+ serial_out(up, UART_LCR, 0xBF); /* Config B mode */
+ efr = serial_in(up, UART_EFR);
+ serial_out(up, UART_EFR, UART_EFR_ECB);
+ serial_out(up, UART_LCR, 0x0); /* Operational mode */
+ serial_out(up, UART_IER, 0x0);
+ serial_out(up, UART_LCR, 0xBF); /* Config B mode */
+ serial_out(up, UART_DLL, uart->dll);
+ serial_out(up, UART_DLM, uart->dlh);
+ serial_out(up, UART_LCR, 0x0); /* Operational mode */
+ serial_out(up, UART_IER, uart->ier);
+ serial_out(up, UART_FCR, up->fcr);
+ serial_out(up, UART_LCR, 0xBF); /* Config B mode */
+ serial_out(up, UART_EFR, efr);
+ serial_out(up, UART_LCR, UART_LCR_WLEN8);
+ serial_out(up, UART_OMAP_SCR, uart->scr);
+ serial_out(up, UART_OMAP_WER, uart->wer);
+ serial_out(up, UART_OMAP_SYSC, uart->sysc | (0x2 << 3));
+ serial_out(up, UART_OMAP_MDR1, 0x00); /* UART 16x mode */
+}
+
+/* Remove this during /mach-omap2/serial.c cleanup for 8250 support */
+void omap_uart_enable_irqs(int enable) {}
+
+static inline void omap_uart_disable_clocks(int num)
+{
+ struct omap_uart_state *uart = &omap_uart[num];
+ if (!uart->clocked)
+ return;
+
+ omap_uart_save_context(num);
+ uart->clocked = 0;
+ clk_disable(uart->ick);
+ clk_disable(uart->fck);
+}
+
+void omap_uart_enable_wakeup(int num)
+{
+ struct omap_uart_state *uart = &omap_uart[num];
+ /* Set wake-enable bit */
+ if (uart->wk_en && uart->wk_mask) {
+ u32 v = __raw_readl(uart->wk_en);
+ v |= uart->wk_mask;
+ __raw_writel(v, uart->wk_en);
+ }
+
+ /* Ensure IOPAD wake-enables are set */
+ if (cpu_is_omap34xx() && uart->padconf) {
+ u16 v = omap_ctrl_readw(uart->padconf);
+ v |= OMAP3_PADCONF_WAKEUPENABLE0;
+ omap_ctrl_writew(v, uart->padconf);
+ }
+}
+
+static void omap_uart_smart_idle_enable(int num, int enable)
+{
+ struct uart_omap_port *up = ui[num];
+ u16 sysc;
+
+ sysc = serial_in(up, UART_OMAP_SYSC) & 0x7;
+
+ if (enable)
+ /* Errata 2.15: Force idle if in DMA mode */
+ sysc |= up->use_dma ? 0x0 : (0x2 << 3);
+ else
+ sysc |= 0x1 << 3;
+
+ serial_out(up, UART_OMAP_SYSC, sysc);
+}
+
+static void omap_uart_block_sleep(int num)
+{
+ struct omap_uart_state *uart = &omap_uart[num];
+
+ omap_uart_enable_clocks(num);
+
+ omap_uart_smart_idle_enable(num, 0);
+ uart->can_sleep = 0;
+ if (uart->timeout)
+ mod_timer(&uart->timer, jiffies + uart->timeout);
+}
+
+static void omap_uart_allow_sleep(int num)
+{
+ struct omap_uart_state *uart = &omap_uart[num];
+ if (!uart->clocked)
+ return;
+
+ if (uart->padconf)
+ omap_uart_enable_wakeup(num);
+
+ omap_uart_smart_idle_enable(num, 1);
+ uart->can_sleep = 1;
+
+ if (uart->timeout)
+ del_timer_sync(&uart->timer);
+}
+
+void omap_uart_prepare_idle(int num)
+{
+ omap_uart_disable_clocks(num);
+}
+
+void omap_uart_resume_idle(int num)
+{
+ struct omap_uart_state *uart = &omap_uart[num];
+
+ omap_uart_enable_clocks(num);
+
+ /* Check for IO pad wakeup */
+ if (cpu_is_omap34xx() && uart->padconf) {
+ u16 p = omap_ctrl_readw(uart->padconf);
+
+ if (p & OMAP3_PADCONF_WAKEUPEVENT0)
+ omap_uart_block_sleep(num);
+ }
+
+ /* Check for normal UART wakeup */
+ if (__raw_readl(uart->wk_st) & uart->wk_mask)
+ omap_uart_block_sleep(num);
+}
+
+void omap_uart_prepare_suspend(void)
+{
+ int j;
+ for (j = 0; j < OMAP_MAX_NR_PORTS; j++)
+ omap_uart_allow_sleep(j);
+}
+
+int omap_uart_can_sleep(void)
+{
+ int can_sleep = 1;
+ int j;
+
+ for (j = 0; j < OMAP_MAX_NR_PORTS; j++) {
+ struct omap_uart_state *uart = &omap_uart[j];
+
+ if (!uart->clocked)
+ continue;
+
+ if (!uart->can_sleep) {
+ can_sleep = 0;
+ continue;
+ }
+
+ omap_uart_allow_sleep(j);
+ }
+ return can_sleep;
+}
+
+static void omap_uart_init_wakeup_source(int num)
+{
+ struct omap_uart_state *uart = &omap_uart[num];
+
+ if (cpu_is_omap34xx()) {
+ u32 mod = (uart->num == 2) ? OMAP3430_PER_MOD : CORE_MOD;
+ u32 wk_mask = 0;
+ u32 padconf = 0;
+
+ uart->wk_en = OMAP34XX_PRM_REGADDR(mod, PM_WKEN1);
+ uart->wk_st = OMAP34XX_PRM_REGADDR(mod, PM_WKST1);
+ switch (uart->num) {
+ case 0:
+ wk_mask = OMAP3430_ST_UART1_MASK;
+ padconf = 0x182;
+ break;
+ case 1:
+ wk_mask = OMAP3430_ST_UART2_MASK;
+ padconf = 0x17a;
+ break;
+ case 2:
+ wk_mask = OMAP3430_ST_UART3_MASK;
+ padconf = 0x19e;
+ break;
+ }
+ uart->wk_mask = wk_mask;
+ uart->padconf = padconf;
+ } else if (cpu_is_omap24xx()) {
+ u32 wk_mask = 0;
+
+ if (cpu_is_omap2430()) {
+ uart->wk_en = OMAP2430_PRM_REGADDR(CORE_MOD, PM_WKEN1);
+ uart->wk_st = OMAP2430_PRM_REGADDR(CORE_MOD, PM_WKST1);
+ } else if (cpu_is_omap2420()) {
+ uart->wk_en = OMAP2420_PRM_REGADDR(CORE_MOD, PM_WKEN1);
+ uart->wk_st = OMAP2420_PRM_REGADDR(CORE_MOD, PM_WKST1);
+ }
+ switch (uart->num) {
+ case 0:
+ wk_mask = OMAP24XX_ST_UART1_MASK;
+ break;
+ case 1:
+ wk_mask = OMAP24XX_ST_UART2_MASK;
+ break;
+ case 2:
+ wk_mask = OMAP24XX_ST_UART3_MASK;
+ break;
+ }
+ uart->wk_mask = wk_mask;
+ } else {
+ uart->wk_en = 0;
+ uart->wk_st = 0;
+ uart->wk_mask = 0;
+ uart->padconf = 0;
+ }
+}
+
+static void omap_uart_idle_timer(unsigned long data)
+{
+
+ struct omap_uart_state *uart = (struct omap_uart_state *)data;
+ struct uart_omap_port *up = ui[uart->num];
+
+ if (up->use_dma && (up->uart_dma.tx_dma_channel != 0xFF
+ || up->uart_dma.rx_dma_channel != 0xFF)) {
+ omap_uart_block_sleep(uart->num);
+ return;
+ }
+
+ omap_uart_allow_sleep(uart->num);
+}
+
+void omap_uart_idle_init(int num)
+{
+ struct omap_uart_state *uart = &omap_uart[num];
+
+ uart->can_sleep = 0;
+ uart->timeout = SLEEP_TIMEOUT;
+ setup_timer(&uart->timer, omap_uart_idle_timer,
+ (unsigned long) uart);
+
+ mod_timer(&uart->timer, jiffies + uart->timeout);
+
+ omap_uart_init_wakeup_source(num);
+}
+
+#else
+static inline void omap_uart_restore_context(int num) {}
+static inline void omap_uart_block_sleep(int num) {}
+static void omap_uart_smart_idle_enable(int num, int enable) {}
+#endif /* CONFIG_PM */
+
+static inline void omap_uart_enable_clocks(int num)
+{
+ struct omap_uart_state *uart = &omap_uart[num];
+ if (uart->clocked)
+ return;
+
+ clk_enable(uart->ick);
+ clk_enable(uart->fck);
+ uart->clocked = 1;
+ omap_uart_restore_context(num);
+}
+
+void __init omap_serial_early_init()
+{
+ int i;
+ char name[16];
+
+ for (i = 0; i < OMAP_MAX_NR_PORTS; i++) {
+ struct omap_uart_state *uart = &omap_uart[i];
+ sprintf(name, "uart%d_ick", i+1);
+ uart->ick = clk_get(NULL, name);
+
+ if (IS_ERR(uart->ick)) {
+ printk(KERN_ERR "Could not get uart%d_ick\n", i+1);
+ uart->ick = NULL;
+ }
+
+ sprintf(name, "uart%d_fck", i+1);
+ uart->fck = clk_get(NULL, name);
+
+ if (IS_ERR(uart->fck)) {
+ printk(KERN_ERR "Could not get uart%d_fck\n", i+1);
+ uart->fck = NULL;
+ }
+
+ uart->num = i;
+ omap_uart_enable_clocks(i);
+ }
+}
+
+#ifdef DEBUG
+#define UART_OMAP_SPR 0x07 /* Scratchpad register */
+static void serial_omap_display_reg(struct uart_port *port)
+{
+ struct uart_omap_port *up = (struct uart_omap_port *)port;
+ unsigned int lcr, efr, mcr, dll, dlh, xon1, xon2, xoff1, xoff2;
+ unsigned int tcr, tlr, uasr;
+ pr_debug("Register dump for UART%d\n", up->pdev->id);
+ pr_debug("IER_REG = 0x%x\n", serial_in(up, UART_IER));
+ pr_debug("IIR_REG = 0x%x\n", serial_in(up, UART_IIR));
+ lcr = serial_in(up, UART_LCR);
+ pr_debug("LCR_REG = 0x%x\n", lcr);
+ mcr = serial_in(up, UART_MCR);
+ pr_debug("MCR_REG = 0x%x\n", mcr);
+ pr_debug("LSR_REG = 0x%x\n", serial_in(up, UART_LSR));
+ pr_debug("MSR_REG = 0x%x\n", serial_in(up, UART_MSR));
+ pr_debug("SPR_REG = 0x%x\n", serial_in(up, UART_OMAP_SPR));
+ pr_debug("MDR1_REG = 0x%x\n", serial_in(up, UART_OMAP_MDR1));
+ pr_debug("MDR2_REG = 0x%x\n", serial_in(up, UART_OMAP_MDR2));
+ pr_debug("SCR_REG = 0x%x\n", serial_in(up, UART_OMAP_SCR));
+ pr_debug("SSR_REG = 0x%x\n", serial_in(up, UART_OMAP_SSR));
+ pr_debug("MVR_REG = 0x%x\n", serial_in(up, UART_OMAP_MVER));
+ pr_debug("SYSC_REG = 0x%x\n", serial_in(up, UART_OMAP_SYSC));
+ pr_debug("SYSS_REG = 0x%x\n", serial_in(up, UART_OMAP_SYSS));
+ pr_debug("WER_REG = 0x%x\n", serial_in(up, UART_OMAP_WER));
+
+ serial_out(up, UART_LCR, 0xBF);
+ dll = serial_in(up, UART_DLL);
+ dlh = serial_in(up, UART_DLM);
+ efr = serial_in(up, UART_EFR);
+ xon1 = serial_in(up, UART_XON1);
+ xon2 = serial_in(up, UART_XON2);
+
+ serial_out(up, UART_EFR, efr | UART_EFR_ECB);
+ serial_out(up, UART_LCR, lcr);
+ serial_out(up, UART_MCR, mcr | UART_MCR_TCRTLR);
+ serial_out(up, UART_LCR, 0xBF);
+
+ tcr = serial_in(up, UART_TI752_TCR);
+ tlr = serial_in(up, UART_TI752_TLR);
+
+ serial_out(up, UART_LCR, lcr);
+ serial_out(up, UART_MCR, mcr);
+ serial_out(up, UART_LCR, 0xBF);
+
+ xoff1 = serial_in(up, UART_XOFF1);
+ xoff2 = serial_in(up, UART_XOFF2);
+ uasr = serial_in(up, UART_OMAP_UASR);
+
+ serial_out(up, UART_EFR, efr);
+ serial_out(up, UART_LCR, lcr);
+
+ pr_debug("DLL_REG = 0x%x\n", dll);
+ pr_debug("DLH_REG = 0x%x\n", dlh);
+ pr_debug("EFR_REG = 0x%x\n", efr);
+
+ pr_debug("XON1_ADDR_REG = 0x%x\n", xon1);
+ pr_debug("XON2_ADDR_REG = 0x%x\n", xon2);
+ pr_debug("TCR_REG = 0x%x\n", tcr);
+ pr_debug("TLR_REG = 0x%x\n", tlr);
+
+ pr_debug("XOFF1_REG = 0x%x\n", xoff1);
+ pr_debug("XOFF2_REG = 0x%x\n", xoff2);
+ pr_debug("UASR_REG = 0x%x\n", uasr);
+}
+#endif /* DEBUG */
+
+subsys_initcall(serial_omap_init);
+module_exit(serial_omap_exit);
+
+MODULE_DESCRIPTION("OMAP High Speed UART driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRIVER_NAME);
+MODULE_AUTHOR("Texas Instruments Inc");
--
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