1 From 5c37079957c5e5555aa8284a879f8cc44fa8eb25 Mon Sep 17 00:00:00 2001
2 From: Alison Wang <b18965@freescale.com>
3 Date: Thu, 4 Aug 2011 09:59:39 +0800
4 Subject: [PATCH 05/52] Add serial driver and irda driver support for MCF5445x and MCF547x/MCF548x
6 Add common serial driver for MCF5445x and MCF547x/MCF548x.
7 Also add irda support for MCF547x/MCF548x.
9 Signed-off-by: Alison Wang <b18965@freescale.com>
11 drivers/tty/serial/Kconfig | 20 ++++++++++
12 drivers/tty/serial/mcf.c | 87 ++++++++++++++++++++++++++++++++++++++++++++
13 2 files changed, 107 insertions(+), 0 deletions(-)
15 --- a/drivers/tty/serial/Kconfig
16 +++ b/drivers/tty/serial/Kconfig
17 @@ -1027,6 +1027,26 @@ config SERIAL_68328_RTS_CTS
18 bool "Support RTS/CTS on 68328 serial port"
19 depends on SERIAL_68328
21 +config SERIAL_COLDFIRE_IRDA
22 + bool "ColdFire IRDA support"
23 + depends on SERIAL_MCF
25 + This driver supports IrDA on the ColdFire platform,
26 + such as MCF547x and MCF548x.
28 + Say Y here if you want to use IrDA 1.1 SIR mode.
30 +config SERIAL_COLDFIRE_EDMA
31 + bool "ColdFire serial EDMA support"
32 + depends on SERIAL_MCF
35 + Enables Enhanced Direct Memory Access(eDMA) in the Coldfire
38 + Say Y here if you want to use DMA processing of transmit
39 + and receive data for the serial driver.
42 bool "Coldfire serial support"
44 --- a/drivers/tty/serial/mcf.c
45 +++ b/drivers/tty/serial/mcf.c
47 * mcf.c -- Freescale ColdFire UART driver
49 * (C) Copyright 2003-2007, Greg Ungerer <gerg@snapgear.com>
50 + * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All Rights Reserved.
51 + * Jason Jin Jason.Jin@freescale.com
52 + * Shrek Wu B16972@freescale.com
53 + * Chengju Cai b22600@freescale.com
55 * This program is free software; you can redistribute it and/or modify
56 * it under the terms of the GNU General Public License as published by
58 #include <linux/serial.h>
59 #include <linux/serial_core.h>
61 +#include <linux/delay.h>
62 #include <asm/coldfire.h>
63 #include <asm/mcfsim.h>
64 #include <asm/mcfuart.h>
65 +#include <asm/m5485psc.h>
66 #include <asm/nettel.h>
68 /****************************************************************************/
70 #define mcf_setppdtr(p, v) do { } while (0)
73 +#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
74 +#define SERIAL_IRDA_LINE (2)
77 /****************************************************************************/
80 @@ -101,6 +111,15 @@ static void mcf_start_tx(struct uart_por
82 struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
84 +#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
85 + if (port->line == SERIAL_IRDA_LINE) {
86 + /* Disable IRDA receiver*/
87 + writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR);
88 + writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR);
90 + writeb(MCFUART_UCR_TXENABLE, port->membase + MCFUART_UCR);
93 pp->imr |= MCFUART_UIR_TXREADY;
94 writeb(pp->imr, port->membase + MCFUART_UIMR);
96 @@ -154,6 +173,30 @@ static int mcf_startup(struct uart_port
98 spin_lock_irqsave(&port->lock, flags);
100 +#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
101 + if (port->line == SERIAL_IRDA_LINE) {
102 + /* Put PSC in IrDA mode */
103 + MCF_PSC_SICR(port->line) = MCF_PSC_SICR_SIM_SIR;
105 + /* Set pulse width to 1.6 uS */
106 + MCF_PSC_IRSDR(port->line) = (uint8_t)
107 + (16 * (CONFIG_MCFCLK / 10000000));
108 + MCF_PSC_IRCR1(port->line) = MCF_PSC_IRCR1_SPUL;
109 + MCF_PSC_IRCR2(port->line) = 0;
111 + /* Enable RTS to send */
112 + MCF_PSC_OPSET(port->line) = MCF_PSC_OPSET_RTS;
114 + /* Setup FIFO Alarms */
115 + MCF_PSC_RFAR(port->line) = MCF_PSC_RFAR_ALARM(248);
116 + MCF_PSC_TFAR(port->line) = MCF_PSC_TFAR_ALARM(248);
118 + MCF_PSC_RFCR(port->line) = MCF_PSC_RFCR_FRMEN
119 + | MCF_PSC_RFCR_GR(4);
120 + MCF_PSC_TFCR(port->line) = MCF_PSC_TFCR_FRMEN
121 + | MCF_PSC_RFCR_GR(4);
124 /* Reset UART, get it into known state... */
125 writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR);
126 writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR);
127 @@ -177,7 +220,17 @@ static void mcf_shutdown(struct uart_por
129 struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
131 +#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
132 + unsigned long delay_counter = 0;
135 +#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
136 + while (!((readb(port->membase + MCFUART_USR)) & MCFUART_USR_TXEMPTY)) {
137 + if (delay_counter++ > 25000)
142 spin_lock_irqsave(&port->lock, flags);
144 /* Disable all interrupts now */
145 @@ -202,7 +255,14 @@ static void mcf_set_termios(struct uart_
148 unsigned char mr1, mr2;
149 +#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
150 + int i = 0; /* hush GCC */
153 +#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
154 + while (i++ < 35000)
157 baud = uart_get_baud_rate(port, termios, old, 0, 230400);
158 #if defined(CONFIG_M5272)
159 baudclk = (MCF_BUSCLK / baud) / 32;
160 @@ -331,6 +391,23 @@ static void mcf_tx_chars(struct mcf_uart
161 while (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXREADY) {
162 if (xmit->head == xmit->tail)
164 +#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
165 + if (port->line == SERIAL_IRDA_LINE) {
166 + while (!((readb(port->membase + MCFUART_USR))\
167 + & MCFUART_USR_TXEMPTY))
169 + /* delay for settle */
170 +#if defined(CONFIG_M548X)
172 +#elif defined(CONFIG_M547X)
176 + while (i++ < 25000)
181 writeb(xmit->buf[xmit->tail], port->membase + MCFUART_UTB);
182 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE -1);
184 @@ -340,6 +417,16 @@ static void mcf_tx_chars(struct mcf_uart
185 uart_write_wakeup(port);
187 if (xmit->head == xmit->tail) {
188 +#ifdef CONFIG_SERIAL_COLDFIRE_IRDA
189 + if (port->line == SERIAL_IRDA_LINE) {
190 + /* Enable receiver for IRDA */
191 + writeb(MCFUART_UCR_CMDRESETRX,\
192 + port->membase + MCFUART_UCR);
194 + writeb(MCFUART_UCR_TXENABLE | MCFUART_UCR_RXENABLE,\
195 + port->membase + MCFUART_UCR);
198 pp->imr &= ~MCFUART_UIR_TXREADY;
199 writeb(pp->imr, port->membase + MCFUART_UIMR);