mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
147 lines
3.4 KiB
147 lines
3.4 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* linux/arch/arm/mach-integrator/integrator_cp.c |
|
* |
|
* 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 "hardware.h" |
|
#include "cm.h" |
|
#include "common.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 0x28 |
|
|
|
/* |
|
* 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(0xca000000 + 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
|
|
|