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Commit ee36d172 authored by Vineet Gupta's avatar Vineet Gupta
Browse files

ARC: [plat-arcfpga] Static platform device for CONFIG_SERIAL_ARC 



N.B. This is old style of hardcoding platform device specific info
in code and it's instantiation thererof using platform_add_devices().
Subsequent patches replace this with DeviceTree based runtime probe.

This patch has been retained just as an example of "don't-do-this" for
newer kernel ports.

Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
parent c121c506

arch/arc/include/asm/irq.h

+1 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
#define TIMER0_IRQ      3

#define TIMER1_IRQ      4



#include <plat/irq.h>		/* Board Specific IRQ assignments */

#include <asm-generic/irq.h>



extern void __init arc_init_IRQ(void);

arch/arc/plat-arcfpga/include/plat/irq.h

0 → 100644
+27 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * vineetg: Feb 2009

 *  -For AA4 board, IRQ assignments to peripherals

 */



#ifndef __PLAT_IRQ_H

#define __PLAT_IRQ_H



#define NR_IRQS		16



#define UART0_IRQ	5

#define UART1_IRQ	10

#define UART2_IRQ	11



#define VMAC_IRQ	6



#define IDE_IRQ		13

#define PCI_IRQ		14

#define PS2_IRQ		15



#endif

arch/arc/plat-arcfpga/include/plat/memmap.h

0 → 100644
+31 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * vineetg: Feb 2009

 *  -For AA4 board, System Memory Map for Peripherals etc

 */



#ifndef __PLAT_MEMMAP_H

#define __PLAT_MEMMAP_H



#define UART0_BASE              0xC0FC1000

#define UART1_BASE              0xC0FC1100



#define VMAC_REG_BASEADDR       0xC0FC2000



#define IDE_CONTROLLER_BASE     0xC0FC9000



#define AHB_PCI_HOST_BRG_BASE   0xC0FD0000



#define PGU_BASEADDR            0xC0FC8000

#define VLCK_ADDR               0xC0FCF028



#define BVCI_LAT_UNIT_BASE      0xC0FED000



#define PS2_BASE_ADDR		0xC0FCC000



#endif

arch/arc/plat-arcfpga/platform.c

+108 −0
Original line number Diff line number Diff line
@@ -10,7 +10,102 @@ 


#include <linux/types.h>

#include <linux/init.h>

#include <linux/device.h>

#include <linux/platform_device.h>

#include <linux/console.h>

#include <asm/setup.h>

#include <asm/irq.h>

#include <asm/clk.h>

#include <plat/memmap.h>



/*----------------------- Platform Devices -----------------------------*/



#if defined(CONFIG_SERIAL_ARC) || defined(CONFIG_SERIAL_ARC_MODULE)



static unsigned long arc_uart_info[] = {

	CONFIG_ARC_SERIAL_BAUD,	/* uart->baud */

	-1,			/* uart->port.uartclk */

	-1,			/* uart->is_emulated (runtime @running_on_hw) */

	0

};



#define ARC_UART_DEV(n)					\

							\

static struct resource arc_uart##n##_res[] = {		\

	{						\

		.start = UART##n##_BASE,			\

		.end   = UART##n##_BASE + 0xFF,		\

		.flags = IORESOURCE_MEM,		\

	},						\

	{						\

		.start = UART##n##_IRQ,			\

		.end   = UART##n##_IRQ,			\

		.flags = IORESOURCE_IRQ,		\

	},						\

};							\

							\

static struct platform_device arc_uart##n##_dev = {	\

	.name = "arc-uart",				\

	.id = n,					\

	.num_resources = ARRAY_SIZE(arc_uart##n##_res),	\

	.resource = arc_uart##n##_res,			\

	.dev = {					\

		.platform_data = &arc_uart_info,	\

	},						\

}



ARC_UART_DEV(0);

#if CONFIG_SERIAL_ARC_NR_PORTS > 1

ARC_UART_DEV(1);

#endif



static struct platform_device *fpga_early_devs[] __initdata = {

#if defined(CONFIG_SERIAL_ARC_CONSOLE)

	&arc_uart0_dev,

#endif

};



static void arc_fpga_serial_init(void)

{

	arc_uart_info[1] = arc_get_core_freq();



	/* To let driver workaround ISS bug: baudh Reg can't be set to 0 */

	arc_uart_info[2] = !running_on_hw;



	early_platform_add_devices(fpga_early_devs,

				   ARRAY_SIZE(fpga_early_devs));



	/*

	 * ARC console driver registers itself as an early platform driver

	 * of class "earlyprintk".

	 * Install it here, followed by probe of devices.

	 * The installation here doesn't require earlyprintk in command line

	 * To do so however, replace the lines below with

	 *	parse_early_param();

	 *	early_platform_driver_probe("earlyprintk", 1, 1);

	 *						      ^^

	 */

	early_platform_driver_register_all("earlyprintk");

	early_platform_driver_probe("earlyprintk", 1, 0);



	/*

	 * This is to make sure that arc uart would be preferred console

	 * despite one/more of following:

	 *   -command line lacked "console=ttyARC0" or

	 *   -CONFIG_VT_CONSOLE was enabled (for no reason whatsoever)

	 * Note that this needs to be done after above early console is reg,

	 * otherwise the early console never gets a chance to run.

	 */

	add_preferred_console("ttyARC", 0, "115200");

}



#else



static void arc_fpga_serial_init(void)

{

}



#endif	/* CONFIG_SERIAL_ARC */



/*

 * Early Platform Initialization called from setup_arch()
@@ -18,12 +113,25 @@ 
void __init arc_platform_early_init(void)

{

	pr_info("[plat-arcfpga]: registering early dev resources\n");



	arc_fpga_serial_init();

}



static struct platform_device *fpga_devs[] __initdata = {

#if defined(CONFIG_SERIAL_ARC) || defined(CONFIG_SERIAL_ARC_MODULE)

	&arc_uart0_dev,

#if CONFIG_SERIAL_ARC_NR_PORTS > 1

	&arc_uart1_dev,

#endif

#endif

};



int __init fpga_plat_init(void)

{

	pr_info("[plat-arcfpga]: registering device resources\n");



	platform_add_devices(fpga_devs, ARRAY_SIZE(fpga_devs));



	return 0;

}

arch_initcall(fpga_plat_init);