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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: Vineet Gupta <vgupta@synopsys.com> Cc: Arnd Bergmann <arnd@arndb.de>
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4 changed files with 167 additions and 0 deletions
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@ -13,6 +13,7 @@
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#define TIMER0_IRQ 3
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#define TIMER1_IRQ 4
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#include <plat/irq.h> /* Board Specific IRQ assignments */
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#include <asm-generic/irq.h>
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extern void __init arc_init_IRQ(void);
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27
arch/arc/plat-arcfpga/include/plat/irq.h
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27
arch/arc/plat-arcfpga/include/plat/irq.h
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/*
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* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* vineetg: Feb 2009
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* -For AA4 board, IRQ assignments to peripherals
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*/
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#ifndef __PLAT_IRQ_H
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#define __PLAT_IRQ_H
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#define NR_IRQS 16
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#define UART0_IRQ 5
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#define UART1_IRQ 10
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#define UART2_IRQ 11
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#define VMAC_IRQ 6
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#define IDE_IRQ 13
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#define PCI_IRQ 14
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#define PS2_IRQ 15
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#endif
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31
arch/arc/plat-arcfpga/include/plat/memmap.h
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arch/arc/plat-arcfpga/include/plat/memmap.h
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/*
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* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* vineetg: Feb 2009
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* -For AA4 board, System Memory Map for Peripherals etc
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*/
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#ifndef __PLAT_MEMMAP_H
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#define __PLAT_MEMMAP_H
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#define UART0_BASE 0xC0FC1000
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#define UART1_BASE 0xC0FC1100
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#define VMAC_REG_BASEADDR 0xC0FC2000
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#define IDE_CONTROLLER_BASE 0xC0FC9000
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#define AHB_PCI_HOST_BRG_BASE 0xC0FD0000
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#define PGU_BASEADDR 0xC0FC8000
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#define VLCK_ADDR 0xC0FCF028
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#define BVCI_LAT_UNIT_BASE 0xC0FED000
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#define PS2_BASE_ADDR 0xC0FCC000
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#endif
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@ -10,7 +10,102 @@
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/console.h>
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#include <asm/setup.h>
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#include <asm/irq.h>
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#include <asm/clk.h>
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#include <plat/memmap.h>
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/*----------------------- Platform Devices -----------------------------*/
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#if defined(CONFIG_SERIAL_ARC) || defined(CONFIG_SERIAL_ARC_MODULE)
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static unsigned long arc_uart_info[] = {
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CONFIG_ARC_SERIAL_BAUD, /* uart->baud */
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-1, /* uart->port.uartclk */
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-1, /* uart->is_emulated (runtime @running_on_hw) */
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0
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};
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#define ARC_UART_DEV(n) \
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\
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static struct resource arc_uart##n##_res[] = { \
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{ \
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.start = UART##n##_BASE, \
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.end = UART##n##_BASE + 0xFF, \
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.flags = IORESOURCE_MEM, \
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}, \
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{ \
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.start = UART##n##_IRQ, \
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.end = UART##n##_IRQ, \
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.flags = IORESOURCE_IRQ, \
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}, \
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}; \
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\
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static struct platform_device arc_uart##n##_dev = { \
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.name = "arc-uart", \
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.id = n, \
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.num_resources = ARRAY_SIZE(arc_uart##n##_res), \
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.resource = arc_uart##n##_res, \
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.dev = { \
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.platform_data = &arc_uart_info, \
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}, \
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}
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ARC_UART_DEV(0);
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#if CONFIG_SERIAL_ARC_NR_PORTS > 1
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ARC_UART_DEV(1);
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#endif
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static struct platform_device *fpga_early_devs[] __initdata = {
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#if defined(CONFIG_SERIAL_ARC_CONSOLE)
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&arc_uart0_dev,
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#endif
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};
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static void arc_fpga_serial_init(void)
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{
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arc_uart_info[1] = arc_get_core_freq();
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/* To let driver workaround ISS bug: baudh Reg can't be set to 0 */
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arc_uart_info[2] = !running_on_hw;
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early_platform_add_devices(fpga_early_devs,
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ARRAY_SIZE(fpga_early_devs));
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/*
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* ARC console driver registers itself as an early platform driver
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* of class "earlyprintk".
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* Install it here, followed by probe of devices.
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* The installation here doesn't require earlyprintk in command line
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* To do so however, replace the lines below with
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* parse_early_param();
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* early_platform_driver_probe("earlyprintk", 1, 1);
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* ^^
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*/
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early_platform_driver_register_all("earlyprintk");
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early_platform_driver_probe("earlyprintk", 1, 0);
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/*
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* This is to make sure that arc uart would be preferred console
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* despite one/more of following:
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* -command line lacked "console=ttyARC0" or
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* -CONFIG_VT_CONSOLE was enabled (for no reason whatsoever)
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* Note that this needs to be done after above early console is reg,
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* otherwise the early console never gets a chance to run.
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*/
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add_preferred_console("ttyARC", 0, "115200");
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}
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#else
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static void arc_fpga_serial_init(void)
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{
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}
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#endif /* CONFIG_SERIAL_ARC */
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/*
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* Early Platform Initialization called from setup_arch()
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@ -18,12 +113,25 @@
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void __init arc_platform_early_init(void)
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{
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pr_info("[plat-arcfpga]: registering early dev resources\n");
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arc_fpga_serial_init();
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}
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static struct platform_device *fpga_devs[] __initdata = {
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#if defined(CONFIG_SERIAL_ARC) || defined(CONFIG_SERIAL_ARC_MODULE)
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&arc_uart0_dev,
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#if CONFIG_SERIAL_ARC_NR_PORTS > 1
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&arc_uart1_dev,
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#endif
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#endif
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};
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int __init fpga_plat_init(void)
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{
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pr_info("[plat-arcfpga]: registering device resources\n");
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platform_add_devices(fpga_devs, ARRAY_SIZE(fpga_devs));
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return 0;
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}
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arch_initcall(fpga_plat_init);
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