mirror of https://gitee.com/openkylin/linux.git
201 lines
4.5 KiB
C
201 lines
4.5 KiB
C
/*
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* board-og.c -- support for the OpenGear KS8695 based boards.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/serial_8250.h>
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#include <linux/gpio.h>
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#include <linux/irq.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include "devices.h"
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#include <mach/regs-gpio.h>
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#include <mach/gpio-ks8695.h>
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#include "generic.h"
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static int og_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
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{
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if (machine_is_im4004() && (slot == 8))
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return KS8695_IRQ_EXTERN1;
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return KS8695_IRQ_EXTERN0;
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}
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static struct ks8695_pci_cfg __initdata og_pci = {
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.mode = KS8695_MODE_PCI,
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.map_irq = og_pci_map_irq,
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};
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static void __init og_register_pci(void)
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{
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/* Initialize the GPIO lines for interrupt mode */
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ks8695_gpio_interrupt(KS8695_GPIO_0, IRQ_TYPE_LEVEL_LOW);
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/* Cardbus Slot */
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if (machine_is_im4004())
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ks8695_gpio_interrupt(KS8695_GPIO_1, IRQ_TYPE_LEVEL_LOW);
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if (IS_ENABLED(CONFIG_PCI))
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ks8695_init_pci(&og_pci);
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}
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/*
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* The PCI bus reset is driven by a dedicated GPIO line. Toggle it here
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* and bring the PCI bus out of reset.
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*/
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static void __init og_pci_bus_reset(void)
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{
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unsigned int rstline = 1;
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/* Some boards use a different GPIO as the PCI reset line */
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if (machine_is_im4004())
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rstline = 2;
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else if (machine_is_im42xx())
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rstline = 0;
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gpio_request(rstline, "PCI reset");
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gpio_direction_output(rstline, 0);
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/* Drive a reset on the PCI reset line */
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gpio_set_value(rstline, 1);
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gpio_set_value(rstline, 0);
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mdelay(100);
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gpio_set_value(rstline, 1);
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mdelay(100);
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}
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/*
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* Direct connect serial ports (non-PCI that is).
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*/
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#define S8250_PHYS 0x03800000
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#define S8250_VIRT 0xf4000000
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#define S8250_SIZE 0x00100000
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static struct __initdata map_desc og_io_desc[] = {
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{
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.virtual = S8250_VIRT,
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.pfn = __phys_to_pfn(S8250_PHYS),
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.length = S8250_SIZE,
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.type = MT_DEVICE,
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}
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};
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static struct resource og_uart_resources[] = {
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{
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.start = S8250_VIRT,
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.end = S8250_VIRT + S8250_SIZE,
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.flags = IORESOURCE_MEM
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},
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};
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static struct plat_serial8250_port og_uart_data[] = {
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{
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.mapbase = S8250_VIRT,
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.membase = (char *) S8250_VIRT,
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.irq = 3,
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.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
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.iotype = UPIO_MEM,
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.regshift = 2,
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.uartclk = 115200 * 16,
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},
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{ },
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};
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static struct platform_device og_uart = {
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.name = "serial8250",
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.id = 0,
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.dev.platform_data = og_uart_data,
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.num_resources = 1,
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.resource = og_uart_resources
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};
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static struct platform_device *og_devices[] __initdata = {
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&og_uart
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};
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static void __init og_init(void)
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{
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ks8695_register_gpios();
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if (machine_is_cm4002()) {
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ks8695_gpio_interrupt(KS8695_GPIO_1, IRQ_TYPE_LEVEL_HIGH);
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iotable_init(og_io_desc, ARRAY_SIZE(og_io_desc));
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platform_add_devices(og_devices, ARRAY_SIZE(og_devices));
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} else {
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og_pci_bus_reset();
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og_register_pci();
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}
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ks8695_add_device_lan();
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ks8695_add_device_wan();
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}
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#ifdef CONFIG_MACH_CM4002
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MACHINE_START(CM4002, "OpenGear/CM4002")
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/* OpenGear Inc. */
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.atag_offset = 0x100,
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.map_io = ks8695_map_io,
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.init_irq = ks8695_init_irq,
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.init_machine = og_init,
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.init_time = ks8695_timer_init,
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.restart = ks8695_restart,
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MACHINE_END
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#endif
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#ifdef CONFIG_MACH_CM4008
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MACHINE_START(CM4008, "OpenGear/CM4008")
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/* OpenGear Inc. */
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.atag_offset = 0x100,
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.map_io = ks8695_map_io,
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.init_irq = ks8695_init_irq,
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.init_machine = og_init,
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.init_time = ks8695_timer_init,
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.restart = ks8695_restart,
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MACHINE_END
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#endif
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#ifdef CONFIG_MACH_CM41xx
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MACHINE_START(CM41XX, "OpenGear/CM41xx")
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/* OpenGear Inc. */
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.atag_offset = 0x100,
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.map_io = ks8695_map_io,
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.init_irq = ks8695_init_irq,
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.init_machine = og_init,
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.init_time = ks8695_timer_init,
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.restart = ks8695_restart,
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MACHINE_END
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#endif
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#ifdef CONFIG_MACH_IM4004
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MACHINE_START(IM4004, "OpenGear/IM4004")
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/* OpenGear Inc. */
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.atag_offset = 0x100,
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.map_io = ks8695_map_io,
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.init_irq = ks8695_init_irq,
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.init_machine = og_init,
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.init_time = ks8695_timer_init,
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.restart = ks8695_restart,
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MACHINE_END
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#endif
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#ifdef CONFIG_MACH_IM42xx
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MACHINE_START(IM42XX, "OpenGear/IM42xx")
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/* OpenGear Inc. */
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.atag_offset = 0x100,
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.map_io = ks8695_map_io,
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.init_irq = ks8695_init_irq,
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.init_machine = og_init,
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.init_time = ks8695_timer_init,
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.restart = ks8695_restart,
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MACHINE_END
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#endif
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