+++ /dev/null
-From 5c37079957c5e5555aa8284a879f8cc44fa8eb25 Mon Sep 17 00:00:00 2001
-From: Alison Wang <b18965@freescale.com>
-Date: Thu, 4 Aug 2011 09:59:39 +0800
-Subject: [PATCH 05/52] Add serial driver and irda driver support for MCF5445x and MCF547x/MCF548x
-
-Add common serial driver for MCF5445x and MCF547x/MCF548x.
-Also add irda support for MCF547x/MCF548x.
-
-Signed-off-by: Alison Wang <b18965@freescale.com>
----
- drivers/tty/serial/Kconfig | 20 ++++++++++
- drivers/tty/serial/mcf.c | 87 ++++++++++++++++++++++++++++++++++++++++++++
- 2 files changed, 107 insertions(+), 0 deletions(-)
-
---- a/drivers/tty/serial/Kconfig
-+++ b/drivers/tty/serial/Kconfig
-@@ -1027,6 +1027,26 @@ config SERIAL_68328_RTS_CTS
- bool "Support RTS/CTS on 68328 serial port"
- depends on SERIAL_68328
-
-+config SERIAL_COLDFIRE_IRDA
-+ bool "ColdFire IRDA support"
-+ depends on SERIAL_MCF
-+ help
-+ This driver supports IrDA on the ColdFire platform,
-+ such as MCF547x and MCF548x.
-+
-+ Say Y here if you want to use IrDA 1.1 SIR mode.
-+
-+config SERIAL_COLDFIRE_EDMA
-+ bool "ColdFire serial EDMA support"
-+ depends on SERIAL_MCF
-+ default n
-+ help
-+ Enables Enhanced Direct Memory Access(eDMA) in the Coldfire
-+ serial driver.
-+
-+ Say Y here if you want to use DMA processing of transmit
-+ and receive data for the serial driver.
-+
- config SERIAL_MCF
- bool "Coldfire serial support"
- depends on COLDFIRE
---- a/drivers/tty/serial/mcf.c
-+++ b/drivers/tty/serial/mcf.c
-@@ -4,6 +4,10 @@
- * mcf.c -- Freescale ColdFire UART driver
- *
- * (C) Copyright 2003-2007, Greg Ungerer <gerg@snapgear.com>
-+ * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All Rights Reserved.
-+ * Jason Jin Jason.Jin@freescale.com
-+ * Shrek Wu B16972@freescale.com
-+ * Chengju Cai b22600@freescale.com
- *
- * 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
-@@ -23,9 +27,11 @@
- #include <linux/serial.h>
- #include <linux/serial_core.h>
- #include <linux/io.h>
-+#include <linux/delay.h>
- #include <asm/coldfire.h>
- #include <asm/mcfsim.h>
- #include <asm/mcfuart.h>
-+#include <asm/m5485psc.h>
- #include <asm/nettel.h>
-
- /****************************************************************************/
-@@ -46,6 +52,10 @@
- #define mcf_setppdtr(p, v) do { } while (0)
- #endif
-
-+#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
-+#define SERIAL_IRDA_LINE (2)
-+#endif
-+
- /****************************************************************************/
-
- /*
-@@ -101,6 +111,15 @@ static void mcf_start_tx(struct uart_por
- {
- struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
-
-+#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
-+ if (port->line == SERIAL_IRDA_LINE) {
-+ /* Disable IRDA receiver*/
-+ writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR);
-+ writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR);
-+
-+ writeb(MCFUART_UCR_TXENABLE, port->membase + MCFUART_UCR);
-+ }
-+#endif
- pp->imr |= MCFUART_UIR_TXREADY;
- writeb(pp->imr, port->membase + MCFUART_UIMR);
- }
-@@ -154,6 +173,30 @@ static int mcf_startup(struct uart_port
-
- spin_lock_irqsave(&port->lock, flags);
-
-+#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
-+ if (port->line == SERIAL_IRDA_LINE) {
-+ /* Put PSC in IrDA mode */
-+ MCF_PSC_SICR(port->line) = MCF_PSC_SICR_SIM_SIR;
-+
-+ /* Set pulse width to 1.6 uS */
-+ MCF_PSC_IRSDR(port->line) = (uint8_t)
-+ (16 * (CONFIG_MCFCLK / 10000000));
-+ MCF_PSC_IRCR1(port->line) = MCF_PSC_IRCR1_SPUL;
-+ MCF_PSC_IRCR2(port->line) = 0;
-+
-+ /* Enable RTS to send */
-+ MCF_PSC_OPSET(port->line) = MCF_PSC_OPSET_RTS;
-+
-+ /* Setup FIFO Alarms */
-+ MCF_PSC_RFAR(port->line) = MCF_PSC_RFAR_ALARM(248);
-+ MCF_PSC_TFAR(port->line) = MCF_PSC_TFAR_ALARM(248);
-+
-+ MCF_PSC_RFCR(port->line) = MCF_PSC_RFCR_FRMEN
-+ | MCF_PSC_RFCR_GR(4);
-+ MCF_PSC_TFCR(port->line) = MCF_PSC_TFCR_FRMEN
-+ | MCF_PSC_RFCR_GR(4);
-+ }
-+#endif
- /* Reset UART, get it into known state... */
- writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR);
- writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR);
-@@ -177,7 +220,17 @@ static void mcf_shutdown(struct uart_por
- {
- struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
- unsigned long flags;
-+#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
-+ unsigned long delay_counter = 0;
-+#endif
-
-+#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
-+ while (!((readb(port->membase + MCFUART_USR)) & MCFUART_USR_TXEMPTY)) {
-+ if (delay_counter++ > 25000)
-+ break;
-+ udelay(10);
-+ }
-+#endif
- spin_lock_irqsave(&port->lock, flags);
-
- /* Disable all interrupts now */
-@@ -202,7 +255,14 @@ static void mcf_set_termios(struct uart_
- unsigned int baudfr;
- #endif
- unsigned char mr1, mr2;
-+#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
-+ int i = 0; /* hush GCC */
-+#endif
-
-+#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
-+ while (i++ < 35000)
-+ udelay(1);
-+#endif
- baud = uart_get_baud_rate(port, termios, old, 0, 230400);
- #if defined(CONFIG_M5272)
- baudclk = (MCF_BUSCLK / baud) / 32;
-@@ -331,6 +391,23 @@ static void mcf_tx_chars(struct mcf_uart
- while (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXREADY) {
- if (xmit->head == xmit->tail)
- break;
-+#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
-+ if (port->line == SERIAL_IRDA_LINE) {
-+ while (!((readb(port->membase + MCFUART_USR))\
-+ & MCFUART_USR_TXEMPTY))
-+ ;
-+ /* delay for settle */
-+#if defined(CONFIG_M548X)
-+ udelay(1);
-+#elif defined(CONFIG_M547X)
-+ udelay(2);
-+#else
-+ int i = 0;
-+ while (i++ < 25000)
-+ udelay(1);
-+#endif
-+ }
-+#endif
- writeb(xmit->buf[xmit->tail], port->membase + MCFUART_UTB);
- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE -1);
- port->icount.tx++;
-@@ -340,6 +417,16 @@ static void mcf_tx_chars(struct mcf_uart
- uart_write_wakeup(port);
-
- if (xmit->head == xmit->tail) {
-+#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
-+ if (port->line == SERIAL_IRDA_LINE) {
-+ /* Enable receiver for IRDA */
-+ writeb(MCFUART_UCR_CMDRESETRX,\
-+ port->membase + MCFUART_UCR);
-+ /* reset RX */
-+ writeb(MCFUART_UCR_TXENABLE | MCFUART_UCR_RXENABLE,\
-+ port->membase + MCFUART_UCR);
-+ }
-+#endif
- pp->imr &= ~MCFUART_UIR_TXREADY;
- writeb(pp->imr, port->membase + MCFUART_UIMR);
- }
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