Merge remote-tracking branch 'u-boot-samsung/master'

[people/ms/u-boot.git] / drivers / serial / serial_mxc.c

diff --git a/drivers/serial/serial_mxc.c b/drivers/serial/serial_mxc.c
index acc5b7d83bd6aad92a5a5e84ae4744c8a053530e..313d560afce8635f3b1f29c3ea029173b69f8c40 100644 (file)
--- a/drivers/serial/serial_mxc.c
+++ b/drivers/serial/serial_mxc.c
@@ -1,58 +1,24 @@
 /*
  * (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
+ * SPDX-License-Identifier:    GPL-2.0+
  */
 
 #include <common.h>
-#ifdef CONFIG_MX31
-#include <asm/arch/mx31.h>
-#else
+#include <watchdog.h>
 #include <asm/arch/imx-regs.h>
 #include <asm/arch/clock.h>
-#endif
+#include <serial.h>
+#include <linux/compiler.h>
 
 #define __REG(x)     (*((volatile u32 *)(x)))
 
-#ifdef CONFIG_SYS_MX31_UART1
-#define UART_PHYS 0x43f90000
-#elif defined(CONFIG_SYS_MX31_UART2)
-#define UART_PHYS 0x43f94000
-#elif defined(CONFIG_SYS_MX31_UART3)
-#define UART_PHYS 0x5000c000
-#elif defined(CONFIG_SYS_MX31_UART4)
-#define UART_PHYS 0x43fb0000
-#elif defined(CONFIG_SYS_MX31_UART5)
-#define UART_PHYS 0x43fb4000
-#elif defined(CONFIG_SYS_MX27_UART1)
-#define UART_PHYS 0x1000a000
-#elif defined(CONFIG_SYS_MX27_UART2)
-#define UART_PHYS 0x1000b000
-#elif defined(CONFIG_SYS_MX27_UART3)
-#define UART_PHYS 0x1000c000
-#elif defined(CONFIG_SYS_MX27_UART4)
-#define UART_PHYS 0x1000d000
-#elif defined(CONFIG_SYS_MX27_UART5)
-#define UART_PHYS 0x1001b000
-#elif defined(CONFIG_SYS_MX27_UART6)
-#define UART_PHYS 0x1001c000
-#else
-#error "define CONFIG_SYS_MX31_UARTx to use the mx31 UART driver"
+#ifndef CONFIG_MXC_UART_BASE
+#error "define CONFIG_MXC_UART_BASE to use the MXC UART driver"
 #endif
 
+#define UART_PHYS      CONFIG_MXC_UART_BASE
+
 /* Register definitions */
 #define URXD  0x0  /* Receiver Register */
 #define UTXD  0x40 /* Transmitter Register */
@@ -111,7 +77,7 @@
 #define  UCR3_DSR        (1<<10) /* Data set ready */
 #define  UCR3_DCD        (1<<9)  /* Data carrier detect */
 #define  UCR3_RI         (1<<8)  /* Ring indicator */
-#define  UCR3_TIMEOUTEN  (1<<7)  /* Timeout interrupt enable */
+#define  UCR3_ADNIMP     (1<<7)  /* Autobaud Detection Not Improved */
 #define  UCR3_RXDSEN    (1<<6)  /* Receive status interrupt enable */
 #define  UCR3_AIRINTEN   (1<<5)  /* Async IR wake interrupt enable */
 #define  UCR3_AWAKEN    (1<<4)  /* Async wake interrupt enable */
@@ -164,13 +130,9 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-void serial_setbrg (void)
+static void mxc_serial_setbrg(void)
 {
-#ifdef CONFIG_MX31
-       u32 clk = mx31_get_ipg_clk();
-#else
-       u32 clk = imx_get_perclk1();
-#endif
+       u32 clk = imx_get_uartclk();
 
        if (!gd->baudrate)
                gd->baudrate = CONFIG_BAUDRATE;
@@ -181,18 +143,20 @@ void serial_setbrg (void)
 
 }
 
-int serial_getc (void)
+static int mxc_serial_getc(void)
 {
-       while (__REG(UART_PHYS + UTS) & UTS_RXEMPTY);
+       while (__REG(UART_PHYS + UTS) & UTS_RXEMPTY)
+               WATCHDOG_RESET();
        return (__REG(UART_PHYS + URXD) & URXD_RX_DATA); /* mask out status from upper word */
 }
 
-void serial_putc (const char c)
+static void mxc_serial_putc(const char c)
 {
        __REG(UART_PHYS + UTXD) = c;
 
        /* wait for transmitter to be ready */
-       while(!(__REG(UART_PHYS + UTS) & UTS_TXEMPTY));
+       while (!(__REG(UART_PHYS + UTS) & UTS_TXEMPTY))
+               WATCHDOG_RESET();
 
        /* If \n, also do \r */
        if (c == '\n')
@@ -202,7 +166,7 @@ void serial_putc (const char c)
 /*
  * Test whether a character is in the RX buffer
  */
-int serial_tstc (void)
+static int mxc_serial_tstc(void)
 {
        /* If receive fifo is empty, return false */
        if (__REG(UART_PHYS + UTS) & UTS_RXEMPTY)
@@ -210,27 +174,19 @@ int serial_tstc (void)
        return 1;
 }
 
-void
-serial_puts (const char *s)
-{
-       while (*s) {
-               serial_putc (*s++);
-       }
-}
-
 /*
  * Initialise the serial port with the given baudrate. The settings
  * are always 8 data bits, no parity, 1 stop bit, no start bits.
  *
  */
-int serial_init (void)
+static int mxc_serial_init(void)
 {
        __REG(UART_PHYS + UCR1) = 0x0;
        __REG(UART_PHYS + UCR2) = 0x0;
 
        while (!(__REG(UART_PHYS + UCR2) & UCR2_SRST));
 
-       __REG(UART_PHYS + UCR3) = 0x0704;
+       __REG(UART_PHYS + UCR3) = 0x0704 | UCR3_ADNIMP;
        __REG(UART_PHYS + UCR4) = 0x8000;
        __REG(UART_PHYS + UESC) = 0x002b;
        __REG(UART_PHYS + UTIM) = 0x0;
@@ -245,3 +201,24 @@ int serial_init (void)
 
        return 0;
 }
+
+static struct serial_device mxc_serial_drv = {
+       .name   = "mxc_serial",
+       .start  = mxc_serial_init,
+       .stop   = NULL,
+       .setbrg = mxc_serial_setbrg,
+       .putc   = mxc_serial_putc,
+       .puts   = default_serial_puts,
+       .getc   = mxc_serial_getc,
+       .tstc   = mxc_serial_tstc,
+};
+
+void mxc_serial_initialize(void)
+{
+       serial_register(&mxc_serial_drv);
+}
+
+__weak struct serial_device *default_serial_console(void)
+{
+       return &mxc_serial_drv;
+}