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d0f349fbce
This patch adds timer support for the i.MX machine family. This code can be used on the following machs: - i.MX1 (tested) - i.MX2 (i.MX21 (to be tested), i.MX27 (tested)) - i.MX3 (i.MX31 (tested)) TODO: It seems impossible to build a kernel for more than one CPU because the timer do not follow the platform device rules. So it does only work if timer 1 can be accessed on all CPUs at the same address. Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
155 lines
4.0 KiB
C
155 lines
4.0 KiB
C
/*
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* Copyright (C) 2000 Deep Blue Solutions Ltd
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* Copyright (C) 2002 Shane Nay (shane@minirl.com)
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* Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/clk.h>
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#include <linux/serial_8250.h>
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#include <asm/hardware.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/time.h>
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#include <asm/memory.h>
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#include <asm/mach/map.h>
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#include <asm/arch/common.h>
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#include <asm/arch/board-mx31ads.h>
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/*!
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* @file mx31ads.c
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*
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* @brief This file contains the board-specific initialization routines.
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*
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* @ingroup System
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*/
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#if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_8250_MODULE)
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/*!
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* The serial port definition structure.
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*/
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static struct plat_serial8250_port serial_platform_data[] = {
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{
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.membase = (void *)(PBC_BASE_ADDRESS + PBC_SC16C652_UARTA),
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.mapbase = (unsigned long)(CS4_BASE_ADDR + PBC_SC16C652_UARTA),
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.irq = EXPIO_INT_XUART_INTA,
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.uartclk = 14745600,
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.regshift = 0,
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.iotype = UPIO_MEM,
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.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ,
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}, {
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.membase = (void *)(PBC_BASE_ADDRESS + PBC_SC16C652_UARTB),
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.mapbase = (unsigned long)(CS4_BASE_ADDR + PBC_SC16C652_UARTB),
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.irq = EXPIO_INT_XUART_INTB,
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.uartclk = 14745600,
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.regshift = 0,
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.iotype = UPIO_MEM,
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.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ,
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},
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{},
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};
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static struct platform_device serial_device = {
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.name = "serial8250",
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.id = 0,
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.dev = {
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.platform_data = serial_platform_data,
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},
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};
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static int __init mxc_init_extuart(void)
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{
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return platform_device_register(&serial_device);
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}
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#else
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static inline int mxc_init_extuart(void)
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{
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return 0;
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}
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#endif
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/*!
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* This structure defines static mappings for the i.MX31ADS board.
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*/
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static struct map_desc mx31ads_io_desc[] __initdata = {
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{
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.virtual = AIPS1_BASE_ADDR_VIRT,
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.pfn = __phys_to_pfn(AIPS1_BASE_ADDR),
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.length = AIPS1_SIZE,
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.type = MT_NONSHARED_DEVICE
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}, {
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.virtual = SPBA0_BASE_ADDR_VIRT,
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.pfn = __phys_to_pfn(SPBA0_BASE_ADDR),
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.length = SPBA0_SIZE,
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.type = MT_NONSHARED_DEVICE
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}, {
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.virtual = AIPS2_BASE_ADDR_VIRT,
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.pfn = __phys_to_pfn(AIPS2_BASE_ADDR),
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.length = AIPS2_SIZE,
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.type = MT_NONSHARED_DEVICE
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}, {
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.virtual = CS4_BASE_ADDR_VIRT,
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.pfn = __phys_to_pfn(CS4_BASE_ADDR),
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.length = CS4_SIZE / 2,
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.type = MT_DEVICE
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},
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};
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/*!
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* Set up static virtual mappings.
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*/
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void __init mx31ads_map_io(void)
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{
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mxc_map_io();
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iotable_init(mx31ads_io_desc, ARRAY_SIZE(mx31ads_io_desc));
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}
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/*!
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* Board specific initialization.
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*/
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static void __init mxc_board_init(void)
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{
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mxc_init_extuart();
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}
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static void __init mx31ads_timer_init(void)
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{
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mxc_clocks_init(26000000);
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mxc_timer_init("ipg_clk.0");
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}
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struct sys_timer mx31ads_timer = {
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.init = mx31ads_timer_init,
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};
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/*
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* The following uses standard kernel macros defined in arch.h in order to
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* initialize __mach_desc_MX31ADS data structure.
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*/
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MACHINE_START(MX31ADS, "Freescale MX31ADS")
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/* Maintainer: Freescale Semiconductor, Inc. */
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.phys_io = AIPS1_BASE_ADDR,
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.io_pg_offst = ((AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc,
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.boot_params = PHYS_OFFSET + 0x100,
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.map_io = mx31ads_map_io,
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.init_irq = mxc_init_irq,
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.init_machine = mxc_board_init,
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.timer = &mx31ads_timer,
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MACHINE_END
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