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

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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: Vineet Gupta <vgupta@synopsys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Vineet Gupta 2013-01-18 15:12:20 +05:30
parent c121c5063c
commit ee36d17221
4 changed files with 167 additions and 0 deletions
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1
arch/arc/include/asm/irq.h
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@ -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);

27
arch/arc/plat-arcfpga/include/plat/irq.h Normal file
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@ -0,0 +1,27 @@
/*
* 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

31
arch/arc/plat-arcfpga/include/plat/memmap.h Normal file
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@ -0,0 +1,31 @@
/*
* 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

108
arch/arc/plat-arcfpga/platform.c
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@ -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);