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/*
* ARC FPGA Platform support code
*
* Copyright (C) 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.
*/
#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()
*/
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);
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