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linux/arch/arm/mach-iop32x/n2100.c
Mike Rapoport e31cf2f4ca mm: don't include asm/pgtable.h if linux/mm.h is already included 
Patch series "mm: consolidate definitions of page table accessors", v2.

The low level page table accessors (pXY_index(), pXY_offset()) are
duplicated across all architectures and sometimes more than once.  For
instance, we have 31 definition of pgd_offset() for 25 supported
architectures.

Most of these definitions are actually identical and typically it boils
down to, e.g.

static inline unsigned long pmd_index(unsigned long address)
{
        return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
}

static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
{
        return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
}

These definitions can be shared among 90% of the arches provided
XYZ_SHIFT, PTRS_PER_XYZ and xyz_page_vaddr() are defined.

For architectures that really need a custom version there is always
possibility to override the generic version with the usual ifdefs magic.

These patches introduce include/linux/pgtable.h that replaces
include/asm-generic/pgtable.h and add the definitions of the page table
accessors to the new header.

This patch (of 12):

The linux/mm.h header includes <asm/pgtable.h> to allow inlining of the
functions involving page table manipulations, e.g.  pte_alloc() and
pmd_alloc().  So, there is no point to explicitly include <asm/pgtable.h>
in the files that include <linux/mm.h>.

The include statements in such cases are remove with a simple loop:

	for f in $(git grep -l "include <linux/mm.h>") ; do
		sed -i -e '/include <asm\/pgtable.h>/ d' $f
	done

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200514170327.31389-1-rppt@kernel.org
Link: http://lkml.kernel.org/r/20200514170327.31389-2-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-09 09:39:13 -07:00

367 lines
8.0 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* arch/arm/mach-iop32x/n2100.c
*
* Board support code for the Thecus N2100 platform.
*
* Author: Rory Bolt <rorybolt@pacbell.net>
* Copyright (C) 2002 Rory Bolt
* Copyright 2003 (c) MontaVista, Software, Inc.
* Copyright (C) 2004 Intel Corp.
*/
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/f75375s.h>
#include <linux/leds-pca9532.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/pm.h>
#include <linux/string.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <linux/mtd/physmap.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/reboot.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/gpio/machine.h>
#include <asm/irq.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/pci.h>
#include <asm/mach/time.h>
#include <asm/mach-types.h>
#include <asm/page.h>
#include "hardware.h"
#include "irqs.h"
#include "gpio-iop32x.h"
/*
* N2100 timer tick configuration.
*/
static void __init n2100_timer_init(void)
{
/* 33.000 MHz crystal. */
iop_init_time(198000000);
}
/*
* N2100 I/O.
*/
static struct map_desc n2100_io_desc[] __initdata = {
{ /* on-board devices */
.virtual = N2100_UART,
.pfn = __phys_to_pfn(N2100_UART),
.length = 0x00100000,
.type = MT_DEVICE
},
};
void __init n2100_map_io(void)
{
iop3xx_map_io();
iotable_init(n2100_io_desc, ARRAY_SIZE(n2100_io_desc));
}
/*
* N2100 PCI.
*/
static int n2100_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
int irq;
if (PCI_SLOT(dev->devfn) == 1) {
/* RTL8110SB #1 */
irq = IRQ_IOP32X_XINT0;
} else if (PCI_SLOT(dev->devfn) == 2) {
/* RTL8110SB #2 */
irq = IRQ_IOP32X_XINT3;
} else if (PCI_SLOT(dev->devfn) == 3) {
/* Sil3512 */
irq = IRQ_IOP32X_XINT2;
} else if (PCI_SLOT(dev->devfn) == 4 && pin == 1) {
/* VT6212 INTA */
irq = IRQ_IOP32X_XINT1;
} else if (PCI_SLOT(dev->devfn) == 4 && pin == 2) {
/* VT6212 INTB */
irq = IRQ_IOP32X_XINT0;
} else if (PCI_SLOT(dev->devfn) == 4 && pin == 3) {
/* VT6212 INTC */
irq = IRQ_IOP32X_XINT2;
} else if (PCI_SLOT(dev->devfn) == 5) {
/* Mini-PCI slot */
irq = IRQ_IOP32X_XINT3;
} else {
printk(KERN_ERR "n2100_pci_map_irq() called for unknown "
"device PCI:%d:%d:%d\n", dev->bus->number,
PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
irq = -1;
}
return irq;
}
static struct hw_pci n2100_pci __initdata = {
.nr_controllers = 1,
.ops = &iop3xx_ops,
.setup = iop3xx_pci_setup,
.preinit = iop3xx_pci_preinit,
.map_irq = n2100_pci_map_irq,
};
/*
* Both r8169 chips on the n2100 exhibit PCI parity problems. Set
* the ->broken_parity_status flag for both ports so that the r8169
* driver knows it should ignore error interrupts.
*/
static void n2100_fixup_r8169(struct pci_dev *dev)
{
if (dev->bus->number == 0 &&
(dev->devfn == PCI_DEVFN(1, 0) ||
dev->devfn == PCI_DEVFN(2, 0)))
dev->broken_parity_status = 1;
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, PCI_ANY_ID, n2100_fixup_r8169);
static int __init n2100_pci_init(void)
{
if (machine_is_n2100())
pci_common_init(&n2100_pci);
return 0;
}
subsys_initcall(n2100_pci_init);
/*
* N2100 machine initialisation.
*/
static struct physmap_flash_data n2100_flash_data = {
.width = 2,
};
static struct resource n2100_flash_resource = {
.start = 0xf0000000,
.end = 0xf0ffffff,
.flags = IORESOURCE_MEM,
};
static struct platform_device n2100_flash_device = {
.name = "physmap-flash",
.id = 0,
.dev = {
.platform_data = &n2100_flash_data,
},
.num_resources = 1,
.resource = &n2100_flash_resource,
};
static struct plat_serial8250_port n2100_serial_port[] = {
{
.mapbase = N2100_UART,
.membase = (char *)N2100_UART,
.irq = 0,
.flags = UPF_SKIP_TEST | UPF_AUTO_IRQ | UPF_SHARE_IRQ,
.iotype = UPIO_MEM,
.regshift = 0,
.uartclk = 1843200,
},
{ },
};
static struct resource n2100_uart_resource = {
.start = N2100_UART,
.end = N2100_UART + 7,
.flags = IORESOURCE_MEM,
};
static struct platform_device n2100_serial_device = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM,
.dev = {
.platform_data = n2100_serial_port,
},
.num_resources = 1,
.resource = &n2100_uart_resource,
};
static struct f75375s_platform_data n2100_f75375s = {
.pwm = { 255, 255 },
.pwm_enable = { 0, 0 },
};
static struct pca9532_platform_data n2100_leds = {
.leds = {
{ .name = "n2100:red:satafail0",
.state = PCA9532_OFF,
.type = PCA9532_TYPE_LED,
},
{ .name = "n2100:red:satafail1",
.state = PCA9532_OFF,
.type = PCA9532_TYPE_LED,
},
{ .name = "n2100:blue:usb",
.state = PCA9532_OFF,
.type = PCA9532_TYPE_LED,
},
{ .type = PCA9532_TYPE_NONE },
{ .type = PCA9532_TYPE_NONE },
{ .type = PCA9532_TYPE_NONE },
{ .type = PCA9532_TYPE_NONE },
{ .name = "n2100:red:usb",
.state = PCA9532_OFF,
.type = PCA9532_TYPE_LED,
},
{ .type = PCA9532_TYPE_NONE }, /* power OFF gpio */
{ .type = PCA9532_TYPE_NONE }, /* reset gpio */
{ .type = PCA9532_TYPE_NONE },
{ .type = PCA9532_TYPE_NONE },
{ .type = PCA9532_TYPE_NONE },
{ .name = "n2100:orange:system",
.state = PCA9532_OFF,
.type = PCA9532_TYPE_LED,
},
{ .name = "n2100:red:system",
.state = PCA9532_OFF,
.type = PCA9532_TYPE_LED,
},
{ .name = "N2100 beeper" ,
.state = PCA9532_OFF,
.type = PCA9532_TYPE_N2100_BEEP,
},
},
.psc = { 0, 0 },
.pwm = { 0, 0 },
};
static struct i2c_board_info __initdata n2100_i2c_devices[] = {
{
I2C_BOARD_INFO("rs5c372b", 0x32),
},
{
I2C_BOARD_INFO("f75375", 0x2e),
.platform_data = &n2100_f75375s,
},
{
I2C_BOARD_INFO("pca9532", 0x60),
.platform_data = &n2100_leds,
},
};
/*
* Pull PCA9532 GPIO #8 low to power off the machine.
*/
static void n2100_power_off(void)
{
local_irq_disable();
/* Start condition, I2C address of PCA9532, write transaction. */
*IOP3XX_IDBR0 = 0xc0;
*IOP3XX_ICR0 = 0xe9;
mdelay(1);
/* Write address 0x08. */
*IOP3XX_IDBR0 = 0x08;
*IOP3XX_ICR0 = 0xe8;
mdelay(1);
/* Write data 0x01, stop condition. */
*IOP3XX_IDBR0 = 0x01;
*IOP3XX_ICR0 = 0xea;
while (1)
;
}
static void n2100_restart(enum reboot_mode mode, const char *cmd)
{
int ret;
ret = gpio_direction_output(N2100_HARDWARE_RESET, 0);
if (ret) {
pr_crit("could not drive reset GPIO low\n");
return;
}
/* Wait for reset to happen */
while (1)
;
}
static struct timer_list power_button_poll_timer;
static void power_button_poll(struct timer_list *unused)
{
if (gpio_get_value(N2100_POWER_BUTTON) == 0) {
ctrl_alt_del();
return;
}
power_button_poll_timer.expires = jiffies + (HZ / 10);
add_timer(&power_button_poll_timer);
}
static int __init n2100_request_gpios(void)
{
int ret;
if (!machine_is_n2100())
return 0;
ret = gpio_request(N2100_HARDWARE_RESET, "reset");
if (ret)
pr_err("could not request reset GPIO\n");
ret = gpio_request(N2100_POWER_BUTTON, "power");
if (ret)
pr_err("could not request power GPIO\n");
else {
ret = gpio_direction_input(N2100_POWER_BUTTON);
if (ret)
pr_err("could not set power GPIO as input\n");
}
/* Set up power button poll timer */
timer_setup(&power_button_poll_timer, power_button_poll, 0);
power_button_poll_timer.expires = jiffies + (HZ / 10);
add_timer(&power_button_poll_timer);
return 0;
}
device_initcall(n2100_request_gpios);
static void __init n2100_init_machine(void)
{
register_iop32x_gpio();
gpiod_add_lookup_table(&iop3xx_i2c0_gpio_lookup);
platform_device_register(&iop3xx_i2c0_device);
platform_device_register(&n2100_flash_device);
platform_device_register(&n2100_serial_device);
platform_device_register(&iop3xx_dma_0_channel);
platform_device_register(&iop3xx_dma_1_channel);
i2c_register_board_info(0, n2100_i2c_devices,
ARRAY_SIZE(n2100_i2c_devices));
pm_power_off = n2100_power_off;
}
MACHINE_START(N2100, "Thecus N2100")
/* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
.atag_offset = 0x100,
.map_io = n2100_map_io,
.init_irq = iop32x_init_irq,
.init_time = n2100_timer_init,
.init_machine = n2100_init_machine,
.restart = n2100_restart,
MACHINE_END
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