// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright ( C ) 2003 Deep Blue Solutions Ltd
*/
#include <linux/kernel.h>
#include <linux/amba/mmci.h>
#include <linux/io.h>
#include <linux/irqchip.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/sched_clock.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>
#include <asm /mach/arch.h>
#include <asm /mach/map.h>
#include "integrator-hardware.h"
#include "integrator-cm.h"
#include "integrator.h"
/* Base address to the core module header */
static struct regmap *cm_map;
/* Base address to the CP controller */
static void __iomem *intcp_con_base;
#define CM_COUNTER_OFFSET 0 x28
/*
* Logical Physical
* f1400000 14000000 Interrupt controller
* f1600000 16000000 UART 0
* fca00000 ca000000 SIC
*/
static struct map_desc intcp_io_desc[] __initdata __maybe_unused = {
{
.virtual = IO_ADDRESS(INTEGRATOR_IC_BASE),
.pfn = __phys_to_pfn(INTEGRATOR_IC_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}, {
.virtual = IO_ADDRESS(INTEGRATOR_UART0_BASE),
.pfn = __phys_to_pfn(INTEGRATOR_UART0_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}, {
.virtual = IO_ADDRESS(INTEGRATOR_CP_SIC_BASE),
.pfn = __phys_to_pfn(INTEGRATOR_CP_SIC_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}
};
static void __init intcp_map_io(void )
{
iotable_init(intcp_io_desc, ARRAY_SIZE(intcp_io_desc));
}
/*
* It seems that the card insertion interrupt remains active after
* we ' ve acknowledged it . We therefore ignore the interrupt , and
* rely on reading it from the SIC . This also means that we must
* clear the latched interrupt .
*/
static unsigned int mmc_status(struct device *dev)
{
unsigned int status = readl(__io_address(0 xca000000 + 4 ));
writel(8 , intcp_con_base + 8 );
return status & 8 ;
}
static struct mmci_platform_data mmc_data = {
.ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
.status = mmc_status,
};
static u64 notrace intcp_read_sched_clock(void )
{
unsigned int val;
/* MMIO so discard return code */
regmap_read(cm_map, CM_COUNTER_OFFSET, &val);
return val;
}
static void __init intcp_init_early(void )
{
cm_map = syscon_regmap_lookup_by_compatible("arm,core-module-integrator" );
if (IS_ERR(cm_map))
return ;
sched_clock_register(intcp_read_sched_clock, 32 , 24000000 );
}
static void __init intcp_init_irq_of(void )
{
cm_init();
irqchip_init();
}
/*
* For the Device Tree , add in the UART , MMC and CLCD specifics as AUXDATA
* and enforce the bus names since these are used for clock lookups .
*/
static struct of_dev_auxdata intcp_auxdata_lookup[] __initdata = {
OF_DEV_AUXDATA("arm,primecell" , INTEGRATOR_CP_MMC_BASE,
"mmci" , &mmc_data),
{ /* sentinel */ },
};
static const struct of_device_id intcp_syscon_match[] = {
{ .compatible = "arm,integrator-cp-syscon" },
{ },
};
static void __init intcp_init_of(void )
{
struct device_node *cpcon;
cpcon = of_find_matching_node(NULL, intcp_syscon_match);
if (!cpcon)
return ;
intcp_con_base = of_iomap(cpcon, 0 );
if (!intcp_con_base)
return ;
of_platform_default_populate(NULL, intcp_auxdata_lookup, NULL);
}
static const char * intcp_dt_board_compat[] = {
"arm,integrator-cp" ,
NULL,
};
DT_MACHINE_START(INTEGRATOR_CP_DT, "ARM Integrator/CP (Device Tree)" )
.reserve = integrator_reserve,
.map_io = intcp_map_io,
.init_early = intcp_init_early,
.init_irq = intcp_init_irq_of,
.init_machine = intcp_init_of,
.dt_compat = intcp_dt_board_compat,
MACHINE_END
Messung V0.5 in Prozent C=94 H=93 G=93
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-09-29)
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