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linux-stable/arch/arm/mach-ixp4xx/fsg-setup.c
Linus Walleij f458ac4797 ARM/net: ixp4xx: Pass ethernet physical base as resource 
In order to probe this ethernet interface from the device tree
all physical MMIO regions must be passed as resources. Begin
this rewrite by first passing the port base address as a
resource for all platforms using this driver, remap it in
the driver and avoid using any reference of the statically
mapped virtual address in the driver.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-01-12 12:59:53 -08:00

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// SPDX-License-Identifier: GPL-2.0
/*
* arch/arm/mach-ixp4xx/fsg-setup.c
*
* FSG board-setup
*
* Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
*
* based on ixdp425-setup.c:
* Copyright (C) 2003-2004 MontaVista Software, Inc.
* based on nslu2-power.c
* Copyright (C) 2005 Tower Technologies
*
* Author: Rod Whitby <rod@whitby.id.au>
* Maintainers: http://www.nslu2-linux.org/
*
*/
#include <linux/gpio.h>
#include <linux/if_ether.h>
#include <linux/irq.h>
#include <linux/serial.h>
#include <linux/serial_8250.h>
#include <linux/leds.h>
#include <linux/reboot.h>
#include <linux/i2c.h>
#include <linux/gpio/machine.h>
#include <linux/io.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include "irqs.h"
#define FSG_SDA_PIN 12
#define FSG_SCL_PIN 13
#define FSG_SB_GPIO 4 /* sync button */
#define FSG_RB_GPIO 9 /* reset button */
#define FSG_UB_GPIO 10 /* usb button */
static struct flash_platform_data fsg_flash_data = {
.map_name = "cfi_probe",
.width = 2,
};
static struct resource fsg_flash_resource = {
.flags = IORESOURCE_MEM,
};
static struct platform_device fsg_flash = {
.name = "IXP4XX-Flash",
.id = 0,
.dev = {
.platform_data = &fsg_flash_data,
},
.num_resources = 1,
.resource = &fsg_flash_resource,
};
static struct gpiod_lookup_table fsg_i2c_gpiod_table = {
.dev_id = "i2c-gpio.0",
.table = {
GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", FSG_SDA_PIN,
NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", FSG_SCL_PIN,
NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
},
};
static struct platform_device fsg_i2c_gpio = {
.name = "i2c-gpio",
.id = 0,
.dev = {
.platform_data = NULL,
},
};
static struct i2c_board_info __initdata fsg_i2c_board_info [] = {
{
I2C_BOARD_INFO("isl1208", 0x6f),
},
};
static struct resource fsg_uart_resources[] = {
{
.start = IXP4XX_UART1_BASE_PHYS,
.end = IXP4XX_UART1_BASE_PHYS + 0x0fff,
.flags = IORESOURCE_MEM,
},
{
.start = IXP4XX_UART2_BASE_PHYS,
.end = IXP4XX_UART2_BASE_PHYS + 0x0fff,
.flags = IORESOURCE_MEM,
}
};
static struct plat_serial8250_port fsg_uart_data[] = {
{
.mapbase = IXP4XX_UART1_BASE_PHYS,
.membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
.irq = IRQ_IXP4XX_UART1,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
.iotype = UPIO_MEM,
.regshift = 2,
.uartclk = IXP4XX_UART_XTAL,
},
{
.mapbase = IXP4XX_UART2_BASE_PHYS,
.membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
.irq = IRQ_IXP4XX_UART2,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
.iotype = UPIO_MEM,
.regshift = 2,
.uartclk = IXP4XX_UART_XTAL,
},
{ }
};
static struct platform_device fsg_uart = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM,
.dev = {
.platform_data = fsg_uart_data,
},
.num_resources = ARRAY_SIZE(fsg_uart_resources),
.resource = fsg_uart_resources,
};
static struct platform_device fsg_leds = {
.name = "fsg-led",
.id = -1,
};
/* Built-in 10/100 Ethernet MAC interfaces */
static struct resource fsg_eth_npeb_resources[] = {
{
.start = IXP4XX_EthB_BASE_PHYS,
.end = IXP4XX_EthB_BASE_PHYS + 0x0fff,
.flags = IORESOURCE_MEM,
},
};
static struct resource fsg_eth_npec_resources[] = {
{
.start = IXP4XX_EthC_BASE_PHYS,
.end = IXP4XX_EthC_BASE_PHYS + 0x0fff,
.flags = IORESOURCE_MEM,
},
};
static struct eth_plat_info fsg_plat_eth[] = {
{
.phy = 5,
.rxq = 3,
.txreadyq = 20,
}, {
.phy = 4,
.rxq = 4,
.txreadyq = 21,
}
};
static struct platform_device fsg_eth[] = {
{
.name = "ixp4xx_eth",
.id = IXP4XX_ETH_NPEB,
.dev = {
.platform_data = fsg_plat_eth,
},
.num_resources = ARRAY_SIZE(fsg_eth_npeb_resources),
.resource = fsg_eth_npeb_resources,
}, {
.name = "ixp4xx_eth",
.id = IXP4XX_ETH_NPEC,
.dev = {
.platform_data = fsg_plat_eth + 1,
},
.num_resources = ARRAY_SIZE(fsg_eth_npec_resources),
.resource = fsg_eth_npec_resources,
}
};
static struct platform_device *fsg_devices[] __initdata = {
&fsg_i2c_gpio,
&fsg_flash,
&fsg_leds,
&fsg_eth[0],
&fsg_eth[1],
};
static irqreturn_t fsg_power_handler(int irq, void *dev_id)
{
/* Signal init to do the ctrlaltdel action, this will bypass init if
* it hasn't started and do a kernel_restart.
*/
ctrl_alt_del();
return IRQ_HANDLED;
}
static irqreturn_t fsg_reset_handler(int irq, void *dev_id)
{
/* This is the paper-clip reset which does an emergency reboot. */
printk(KERN_INFO "Restarting system.\n");
machine_restart(NULL);
/* This should never be reached. */
return IRQ_HANDLED;
}
static void __init fsg_init(void)
{
uint8_t __iomem *f;
ixp4xx_sys_init();
fsg_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
fsg_flash_resource.end =
IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
*IXP4XX_EXP_CS0 |= IXP4XX_FLASH_WRITABLE;
*IXP4XX_EXP_CS1 = *IXP4XX_EXP_CS0;
/* Configure CS2 for operation, 8bit and writable */
*IXP4XX_EXP_CS2 = 0xbfff0002;
gpiod_add_lookup_table(&fsg_i2c_gpiod_table);
i2c_register_board_info(0, fsg_i2c_board_info,
ARRAY_SIZE(fsg_i2c_board_info));
/* This is only useful on a modified machine, but it is valuable
* to have it first in order to see debug messages, and so that
* it does *not* get removed if platform_add_devices fails!
*/
(void)platform_device_register(&fsg_uart);
platform_add_devices(fsg_devices, ARRAY_SIZE(fsg_devices));
if (request_irq(gpio_to_irq(FSG_RB_GPIO), &fsg_reset_handler,
IRQF_TRIGGER_LOW, "FSG reset button", NULL) < 0) {
printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
gpio_to_irq(FSG_RB_GPIO));
}
if (request_irq(gpio_to_irq(FSG_SB_GPIO), &fsg_power_handler,
IRQF_TRIGGER_LOW, "FSG power button", NULL) < 0) {
printk(KERN_DEBUG "Power Button IRQ %d not available\n",
gpio_to_irq(FSG_SB_GPIO));
}
/*
* Map in a portion of the flash and read the MAC addresses.
* Since it is stored in BE in the flash itself, we need to
* byteswap it if we're in LE mode.
*/
f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x400000);
if (f) {
#ifdef __ARMEB__
int i;
for (i = 0; i < 6; i++) {
fsg_plat_eth[0].hwaddr[i] = readb(f + 0x3C0422 + i);
fsg_plat_eth[1].hwaddr[i] = readb(f + 0x3C043B + i);
}
#else
/*
Endian-swapped reads from unaligned addresses are
required to extract the two MACs from the big-endian
Redboot config area in flash.
*/
fsg_plat_eth[0].hwaddr[0] = readb(f + 0x3C0421);
fsg_plat_eth[0].hwaddr[1] = readb(f + 0x3C0420);
fsg_plat_eth[0].hwaddr[2] = readb(f + 0x3C0427);
fsg_plat_eth[0].hwaddr[3] = readb(f + 0x3C0426);
fsg_plat_eth[0].hwaddr[4] = readb(f + 0x3C0425);
fsg_plat_eth[0].hwaddr[5] = readb(f + 0x3C0424);
fsg_plat_eth[1].hwaddr[0] = readb(f + 0x3C0439);
fsg_plat_eth[1].hwaddr[1] = readb(f + 0x3C043F);
fsg_plat_eth[1].hwaddr[2] = readb(f + 0x3C043E);
fsg_plat_eth[1].hwaddr[3] = readb(f + 0x3C043D);
fsg_plat_eth[1].hwaddr[4] = readb(f + 0x3C043C);
fsg_plat_eth[1].hwaddr[5] = readb(f + 0x3C0443);
#endif
iounmap(f);
}
printk(KERN_INFO "FSG: Using MAC address %pM for port 0\n",
fsg_plat_eth[0].hwaddr);
printk(KERN_INFO "FSG: Using MAC address %pM for port 1\n",
fsg_plat_eth[1].hwaddr);
}
MACHINE_START(FSG, "Freecom FSG-3")
/* Maintainer: www.nslu2-linux.org */
.map_io = ixp4xx_map_io,
.init_early = ixp4xx_init_early,
.init_irq = ixp4xx_init_irq,
.init_time = ixp4xx_timer_init,
.atag_offset = 0x100,
.init_machine = fsg_init,
#if defined(CONFIG_PCI)
.dma_zone_size = SZ_64M,
#endif
.restart = ixp4xx_restart,
MACHINE_END
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