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332 lines
7.3 KiB
332 lines
7.3 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* arch/arm/mach-iop32x/iq31244.c |
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* |
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* Board support code for the Intel EP80219 and IQ31244 platforms. |
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* |
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* Author: Rory Bolt <[email protected]> |
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* Copyright (C) 2002 Rory Bolt |
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* Copyright 2003 (c) MontaVista, Software, Inc. |
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* Copyright (C) 2004 Intel Corp. |
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*/ |
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#include <linux/mm.h> |
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#include <linux/init.h> |
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#include <linux/delay.h> |
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#include <linux/kernel.h> |
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#include <linux/pci.h> |
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#include <linux/pm.h> |
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#include <linux/string.h> |
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#include <linux/serial_core.h> |
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#include <linux/serial_8250.h> |
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#include <linux/mtd/physmap.h> |
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#include <linux/platform_device.h> |
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#include <linux/io.h> |
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#include <linux/gpio/machine.h> |
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#include <asm/cputype.h> |
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#include <asm/irq.h> |
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#include <asm/mach/arch.h> |
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#include <asm/mach/map.h> |
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#include <asm/mach/pci.h> |
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#include <asm/mach/time.h> |
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#include <asm/mach-types.h> |
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#include <asm/page.h> |
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#include "hardware.h" |
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#include "irqs.h" |
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#include "gpio-iop32x.h" |
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/* |
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* Until March of 2007 iq31244 platforms and ep80219 platforms shared the |
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* same machine id, and the processor type was used to select board type. |
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* However this assumption breaks for an iq80219 board which is an iop219 |
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* processor on an iq31244 board. The force_ep80219 flag has been added |
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* for old boot loaders using the iq31244 machine id for an ep80219 platform. |
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*/ |
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static int force_ep80219; |
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static int is_80219(void) |
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{ |
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return !!((read_cpuid_id() & 0xffffffe0) == 0x69052e20); |
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} |
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static int is_ep80219(void) |
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{ |
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if (machine_is_ep80219() || force_ep80219) |
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return 1; |
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else |
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return 0; |
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} |
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/* |
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* EP80219/IQ31244 timer tick configuration. |
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*/ |
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static void __init iq31244_timer_init(void) |
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{ |
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if (is_ep80219()) { |
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/* 33.333 MHz crystal. */ |
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iop_init_time(200000000); |
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} else { |
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/* 33.000 MHz crystal. */ |
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iop_init_time(198000000); |
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} |
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} |
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/* |
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* IQ31244 I/O. |
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*/ |
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static struct map_desc iq31244_io_desc[] __initdata = { |
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{ /* on-board devices */ |
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.virtual = IQ31244_UART, |
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.pfn = __phys_to_pfn(IQ31244_UART), |
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.length = 0x00100000, |
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.type = MT_DEVICE, |
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}, |
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}; |
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void __init iq31244_map_io(void) |
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{ |
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iop3xx_map_io(); |
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iotable_init(iq31244_io_desc, ARRAY_SIZE(iq31244_io_desc)); |
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} |
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/* |
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* EP80219/IQ31244 PCI. |
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*/ |
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static int __init |
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ep80219_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
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{ |
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int irq; |
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if (slot == 0) { |
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/* CFlash */ |
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irq = IRQ_IOP32X_XINT1; |
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} else if (slot == 1) { |
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/* 82551 Pro 100 */ |
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irq = IRQ_IOP32X_XINT0; |
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} else if (slot == 2) { |
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/* PCI-X Slot */ |
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irq = IRQ_IOP32X_XINT3; |
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} else if (slot == 3) { |
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/* SATA */ |
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irq = IRQ_IOP32X_XINT2; |
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} else { |
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printk(KERN_ERR "ep80219_pci_map_irq() called for unknown " |
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"device PCI:%d:%d:%d\n", dev->bus->number, |
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PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn)); |
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irq = -1; |
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} |
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return irq; |
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} |
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static struct hw_pci ep80219_pci __initdata = { |
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.nr_controllers = 1, |
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.ops = &iop3xx_ops, |
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.setup = iop3xx_pci_setup, |
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.preinit = iop3xx_pci_preinit, |
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.map_irq = ep80219_pci_map_irq, |
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}; |
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static int __init |
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iq31244_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
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{ |
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int irq; |
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if (slot == 0) { |
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/* CFlash */ |
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irq = IRQ_IOP32X_XINT1; |
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} else if (slot == 1) { |
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/* SATA */ |
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irq = IRQ_IOP32X_XINT2; |
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} else if (slot == 2) { |
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/* PCI-X Slot */ |
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irq = IRQ_IOP32X_XINT3; |
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} else if (slot == 3) { |
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/* 82546 GigE */ |
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irq = IRQ_IOP32X_XINT0; |
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} else { |
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printk(KERN_ERR "iq31244_pci_map_irq called for unknown " |
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"device PCI:%d:%d:%d\n", dev->bus->number, |
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PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn)); |
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irq = -1; |
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} |
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return irq; |
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} |
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static struct hw_pci iq31244_pci __initdata = { |
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.nr_controllers = 1, |
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.ops = &iop3xx_ops, |
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.setup = iop3xx_pci_setup, |
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.preinit = iop3xx_pci_preinit, |
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.map_irq = iq31244_pci_map_irq, |
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}; |
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static int __init iq31244_pci_init(void) |
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{ |
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if (is_ep80219()) |
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pci_common_init(&ep80219_pci); |
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else if (machine_is_iq31244()) { |
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if (is_80219()) { |
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printk("note: iq31244 board type has been selected\n"); |
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printk("note: to select ep80219 operation:\n"); |
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printk("\t1/ specify \"force_ep80219\" on the kernel" |
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" command line\n"); |
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printk("\t2/ update boot loader to pass" |
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" the ep80219 id: %d\n", MACH_TYPE_EP80219); |
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} |
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pci_common_init(&iq31244_pci); |
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} |
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return 0; |
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} |
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subsys_initcall(iq31244_pci_init); |
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/* |
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* IQ31244 machine initialisation. |
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*/ |
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static struct physmap_flash_data iq31244_flash_data = { |
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.width = 2, |
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}; |
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static struct resource iq31244_flash_resource = { |
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.start = 0xf0000000, |
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.end = 0xf07fffff, |
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.flags = IORESOURCE_MEM, |
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}; |
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static struct platform_device iq31244_flash_device = { |
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.name = "physmap-flash", |
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.id = 0, |
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.dev = { |
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.platform_data = &iq31244_flash_data, |
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}, |
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.num_resources = 1, |
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.resource = &iq31244_flash_resource, |
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}; |
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static struct plat_serial8250_port iq31244_serial_port[] = { |
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{ |
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.mapbase = IQ31244_UART, |
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.membase = (char *)IQ31244_UART, |
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.irq = IRQ_IOP32X_XINT1, |
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.flags = UPF_SKIP_TEST, |
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.iotype = UPIO_MEM, |
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.regshift = 0, |
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.uartclk = 1843200, |
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}, |
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{ }, |
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}; |
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static struct resource iq31244_uart_resource = { |
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.start = IQ31244_UART, |
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.end = IQ31244_UART + 7, |
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.flags = IORESOURCE_MEM, |
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}; |
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static struct platform_device iq31244_serial_device = { |
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.name = "serial8250", |
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.id = PLAT8250_DEV_PLATFORM, |
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.dev = { |
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.platform_data = iq31244_serial_port, |
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}, |
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.num_resources = 1, |
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.resource = &iq31244_uart_resource, |
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}; |
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/* |
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* This function will send a SHUTDOWN_COMPLETE message to the PIC |
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* controller over I2C. We are not using the i2c subsystem since |
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* we are going to power off and it may be removed |
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*/ |
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void ep80219_power_off(void) |
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{ |
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/* |
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* Send the Address byte w/ the start condition |
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*/ |
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*IOP3XX_IDBR1 = 0x60; |
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*IOP3XX_ICR1 = 0xE9; |
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mdelay(1); |
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/* |
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* Send the START_MSG byte w/ no start or stop condition |
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*/ |
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*IOP3XX_IDBR1 = 0x0F; |
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*IOP3XX_ICR1 = 0xE8; |
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mdelay(1); |
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/* |
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* Send the SHUTDOWN_COMPLETE Message ID byte w/ no start or |
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* stop condition |
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*/ |
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*IOP3XX_IDBR1 = 0x03; |
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*IOP3XX_ICR1 = 0xE8; |
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mdelay(1); |
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/* |
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* Send an ignored byte w/ stop condition |
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*/ |
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*IOP3XX_IDBR1 = 0x00; |
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*IOP3XX_ICR1 = 0xEA; |
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while (1) |
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; |
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} |
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static void __init iq31244_init_machine(void) |
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{ |
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register_iop32x_gpio(); |
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gpiod_add_lookup_table(&iop3xx_i2c0_gpio_lookup); |
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gpiod_add_lookup_table(&iop3xx_i2c1_gpio_lookup); |
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platform_device_register(&iop3xx_i2c0_device); |
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platform_device_register(&iop3xx_i2c1_device); |
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platform_device_register(&iq31244_flash_device); |
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platform_device_register(&iq31244_serial_device); |
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platform_device_register(&iop3xx_dma_0_channel); |
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platform_device_register(&iop3xx_dma_1_channel); |
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if (is_ep80219()) |
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pm_power_off = ep80219_power_off; |
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if (!is_80219()) |
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platform_device_register(&iop3xx_aau_channel); |
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} |
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static int __init force_ep80219_setup(char *str) |
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{ |
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force_ep80219 = 1; |
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return 1; |
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} |
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__setup("force_ep80219", force_ep80219_setup); |
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MACHINE_START(IQ31244, "Intel IQ31244") |
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/* Maintainer: Intel Corp. */ |
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.atag_offset = 0x100, |
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.map_io = iq31244_map_io, |
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.init_irq = iop32x_init_irq, |
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.init_time = iq31244_timer_init, |
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.init_machine = iq31244_init_machine, |
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.restart = iop3xx_restart, |
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MACHINE_END |
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/* There should have been an ep80219 machine identifier from the beginning. |
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* Boot roms older than March 2007 do not know the ep80219 machine id. Pass |
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* "force_ep80219" on the kernel command line, otherwise iq31244 operation |
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* will be selected. |
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*/ |
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MACHINE_START(EP80219, "Intel EP80219") |
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/* Maintainer: Intel Corp. */ |
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.atag_offset = 0x100, |
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.map_io = iq31244_map_io, |
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.init_irq = iop32x_init_irq, |
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.init_time = iq31244_timer_init, |
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.init_machine = iq31244_init_machine, |
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.restart = iop3xx_restart, |
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MACHINE_END
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