Release 4.9 arch/arm/mach-integrator/integrator_ap.c
/*
* linux/arch/arm/mach-integrator/integrator_ap.c
*
* Copyright (C) 2000-2003 Deep Blue Solutions Ltd
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/syscore_ops.h>
#include <linux/amba/bus.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/termios.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include "hardware.h"
#include "cm.h"
#include "common.h"
#include "pci_v3.h"
#include "lm.h"
/* Base address to the AP system controller */
void __iomem *ap_syscon_base;
/* Base address to the external bus interface */
static void __iomem *ebi_base;
/*
* All IO addresses are mapped onto VA 0xFFFx.xxxx, where x.xxxx
* is the (PA >> 12).
*
* Setup a VA for the Integrator interrupt controller (for header #0,
* just for now).
*/
#define VA_IC_BASE __io_address(INTEGRATOR_IC_BASE)
/*
* Logical Physical
* f1400000 14000000 Interrupt controller
* f1600000 16000000 UART 0
*/
static struct map_desc ap_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
}
};
static void __init ap_map_io(void)
{
iotable_init(ap_io_desc, ARRAY_SIZE(ap_io_desc));
pci_v3_early_init();
}
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#ifdef CONFIG_PM
static unsigned long ic_irq_enable;
static int irq_suspend(void)
{
ic_irq_enable = readl(VA_IC_BASE + IRQ_ENABLE);
return 0;
}
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static void irq_resume(void)
{
/* disable all irq sources */
cm_clear_irqs();
writel(-1, VA_IC_BASE + IRQ_ENABLE_CLEAR);
writel(-1, VA_IC_BASE + FIQ_ENABLE_CLEAR);
writel(ic_irq_enable, VA_IC_BASE + IRQ_ENABLE_SET);
}
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#else
#define irq_suspend NULL
#define irq_resume NULL
#endif
static struct syscore_ops irq_syscore_ops = {
.suspend = irq_suspend,
.resume = irq_resume,
};
static int __init irq_syscore_init(void)
{
register_syscore_ops(&irq_syscore_ops);
return 0;
}
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device_initcall(irq_syscore_init);
/*
* For the PL010 found in the Integrator/AP some of the UART control is
* implemented in the system controller and accessed using a callback
* from the driver.
*/
static void integrator_uart_set_mctrl(struct amba_device *dev,
void __iomem *base, unsigned int mctrl)
{
unsigned int ctrls = 0, ctrlc = 0, rts_mask, dtr_mask;
u32 phybase = dev->res.start;
if (phybase == INTEGRATOR_UART0_BASE) {
/* UART0 */
rts_mask = 1 << 4;
dtr_mask = 1 << 5;
} else {
/* UART1 */
rts_mask = 1 << 6;
dtr_mask = 1 << 7;
}
if (mctrl & TIOCM_RTS)
ctrlc |= rts_mask;
else
ctrls |= rts_mask;
if (mctrl & TIOCM_DTR)
ctrlc |= dtr_mask;
else
ctrls |= dtr_mask;
__raw_writel(ctrls, ap_syscon_base + INTEGRATOR_SC_CTRLS_OFFSET);
__raw_writel(ctrlc, ap_syscon_base + INTEGRATOR_SC_CTRLC_OFFSET);
}
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struct amba_pl010_data ap_uart_data = {
.set_mctrl = integrator_uart_set_mctrl,
};
void __init ap_init_early(void)
{
}
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static void __init ap_init_irq_of(void)
{
cm_init();
irqchip_init();
}
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/* For the Device Tree, add in the UART callbacks as AUXDATA */
static struct of_dev_auxdata ap_auxdata_lookup[] __initdata = {
OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART0_BASE,
"uart0", &ap_uart_data),
OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART1_BASE,
"uart1", &ap_uart_data),
{ /* sentinel */ },
};
static const struct of_device_id ap_syscon_match[] = {
{ .compatible = "arm,integrator-ap-syscon"},
{ },
};
static const struct of_device_id ebi_match[] = {
{ .compatible = "arm,external-bus-interface"},
{ },
};
static void __init ap_init_of(void)
{
unsigned long sc_dec;
struct device_node *syscon;
struct device_node *ebi;
int i;
syscon = of_find_matching_node(NULL, ap_syscon_match);
if (!syscon)
return;
ebi = of_find_matching_node(NULL, ebi_match);
if (!ebi)
return;
ap_syscon_base = of_iomap(syscon, 0);
if (!ap_syscon_base)
return;
ebi_base = of_iomap(ebi, 0);
if (!ebi_base)
return;
of_platform_default_populate(NULL, ap_auxdata_lookup, NULL);
sc_dec = readl(ap_syscon_base + INTEGRATOR_SC_DEC_OFFSET);
for (i = 0; i < 4; i++) {
struct lm_device *lmdev;
if ((sc_dec & (16 << i)) == 0)
continue;
lmdev = kzalloc(sizeof(struct lm_device), GFP_KERNEL);
if (!lmdev)
continue;
lmdev->resource.start = 0xc0000000 + 0x10000000 * i;
lmdev->resource.end = lmdev->resource.start + 0x0fffffff;
lmdev->resource.flags = IORESOURCE_MEM;
lmdev->irq = irq_of_parse_and_map(syscon, i);
lmdev->id = i;
lm_device_register(lmdev);
}
}
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static const char * ap_dt_board_compat[] = {
"arm,integrator-ap",
NULL,
};
DT_MACHINE_START(INTEGRATOR_AP_DT, "ARM Integrator/AP (Device Tree)")
.reserve = integrator_reserve,
.map_io = ap_map_io,
.init_early = ap_init_early,
.init_irq = ap_init_irq_of,
.init_machine = ap_init_of,
.dt_compat = ap_dt_board_compat,
MACHINE_END
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