From eb49e9076141756d6c8fc97663e94eead0d7fc42 Mon Sep 17 00:00:00 2001
From: Greg Ungerer <gerg@snapgear.com>
Date: Fri, 1 Feb 2008 17:34:50 +1000
Subject: [PATCH] m68knommu: platform setup for 528x ColdFire parts

Switch to platform style configuration for 528x ColdFire parts.
Initial support is for the UARTs. DMA support moved to common code
for all ColdFire parts.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 arch/m68knommu/platform/528x/config.c | 86 ++++++++++++++++++++++++---
 1 file changed, 77 insertions(+), 9 deletions(-)

diff --git a/arch/m68knommu/platform/528x/config.c b/arch/m68knommu/platform/528x/config.c
index acbd43486d97..036e1b73d944 100644
--- a/arch/m68knommu/platform/528x/config.c
+++ b/arch/m68knommu/platform/528x/config.c
@@ -16,11 +16,15 @@
 #include <linux/param.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
-#include <asm/dma.h>
+#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/flash.h>
+#include <linux/io.h>
 #include <asm/machdep.h>
 #include <asm/coldfire.h>
 #include <asm/mcfsim.h>
-#include <asm/mcfdma.h>
+#include <asm/mcfuart.h>
+#include <asm/mcfqspi.h>
 
 /***************************************************************************/
 
@@ -28,14 +32,67 @@ void coldfire_reset(void);
 
 /***************************************************************************/
 
-/*
- *	DMA channel base address table.
- */
-unsigned int   dma_base_addr[MAX_M68K_DMA_CHANNELS] = {
-        MCF_MBAR + MCFDMA_BASE0,
+static struct mcf_platform_uart m528x_uart_platform[] = {
+	{
+		.mapbase	= MCF_MBAR + MCFUART_BASE1,
+		.irq		= MCFINT_VECBASE + MCFINT_UART0,
+	},
+	{
+		.mapbase 	= MCF_MBAR + MCFUART_BASE2,
+		.irq		= MCFINT_VECBASE + MCFINT_UART0 + 1,
+	},
+	{
+		.mapbase 	= MCF_MBAR + MCFUART_BASE3,
+		.irq		= MCFINT_VECBASE + MCFINT_UART0 + 2,
+	},
+	{ },
 };
 
-unsigned int dma_device_address[MAX_M68K_DMA_CHANNELS];
+static struct platform_device m528x_uart = {
+	.name			= "mcfuart",
+	.id			= 0,
+	.dev.platform_data	= m528x_uart_platform,
+};
+
+static struct platform_device *m528x_devices[] __initdata = {
+	&m528x_uart,
+};
+
+/***************************************************************************/
+
+#define	INTC0	(MCF_MBAR + MCFICM_INTC0)
+
+static void __init m528x_uart_init_line(int line, int irq)
+{
+	u8 port;
+	u32 imr;
+
+	if ((line < 0) || (line > 2))
+		return;
+
+	/* level 6, line based priority */
+	writeb(0x30+line, INTC0 + MCFINTC_ICR0 + MCFINT_UART0 + line);
+
+	imr = readl(INTC0 + MCFINTC_IMRL);
+	imr &= ~((1 << (irq - MCFINT_VECBASE)) | 1);
+	writel(imr, INTC0 + MCFINTC_IMRL);
+
+	/* make sure PUAPAR is set for UART0 and UART1 */
+	if (line < 2) {
+		port = readb(MCF_MBAR + MCF5282_GPIO_PUAPAR);
+		port |= (0x03 << (line * 2));
+		writeb(port, MCF_MBAR + MCF5282_GPIO_PUAPAR);
+	}
+}
+
+static void __init m528x_uarts_init(void)
+{
+	const int nrlines = ARRAY_SIZE(m528x_uart_platform);
+	int line;
+
+	for (line = 0; (line < nrlines); line++)
+		m528x_uart_init_line(line, m528x_uart_platform[line].irq);
+}
 
 /***************************************************************************/
 
@@ -54,10 +111,21 @@ void mcf_autovector(unsigned int vec)
 
 /***************************************************************************/
 
-void config_BSP(char *commandp, int size)
+void __init config_BSP(char *commandp, int size)
 {
 	mcf_disableall();
 	mach_reset = coldfire_reset;
 }
 
 /***************************************************************************/
+
+static int __init init_BSP(void)
+{
+	m528x_uarts_init();
+	platform_add_devices(m528x_devices, ARRAY_SIZE(m528x_devices));
+	return 0;
+}
+
+arch_initcall(init_BSP);
+
+/***************************************************************************/
-- 
GitLab