+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * PQ2 ADS-style PCI interrupt controller
- *
- * Copyright 2007 Freescale Semiconductor, Inc.
- * Author: Scott Wood <scottwood@freescale.com>
- *
- * Loosely based on mpc82xx ADS support by Vitaly Bordug <vbordug@ru.mvista.com>
- * Copyright (c) 2006 MontaVista Software, Inc.
- */
-
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <linux/irq.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/of_irq.h>
-
-#include <asm/io.h>
-#include <asm/cpm2.h>
-
-#include "pq2.h"
-
-static DEFINE_RAW_SPINLOCK(pci_pic_lock);
-
-struct pq2ads_pci_pic {
- struct device_node *node;
- struct irq_domain *host;
-
- struct {
- u32 stat;
- u32 mask;
- } __iomem *regs;
-};
-
-#define NUM_IRQS 32
-
-static void pq2ads_pci_mask_irq(struct irq_data *d)
-{
- struct pq2ads_pci_pic *priv = irq_data_get_irq_chip_data(d);
- int irq = NUM_IRQS - irqd_to_hwirq(d) - 1;
-
- if (irq != -1) {
- unsigned long flags;
- raw_spin_lock_irqsave(&pci_pic_lock, flags);
-
- setbits32(&priv->regs->mask, 1 << irq);
- mb();
-
- raw_spin_unlock_irqrestore(&pci_pic_lock, flags);
- }
-}
-
-static void pq2ads_pci_unmask_irq(struct irq_data *d)
-{
- struct pq2ads_pci_pic *priv = irq_data_get_irq_chip_data(d);
- int irq = NUM_IRQS - irqd_to_hwirq(d) - 1;
-
- if (irq != -1) {
- unsigned long flags;
-
- raw_spin_lock_irqsave(&pci_pic_lock, flags);
- clrbits32(&priv->regs->mask, 1 << irq);
- raw_spin_unlock_irqrestore(&pci_pic_lock, flags);
- }
-}
-
-static struct irq_chip pq2ads_pci_ic = {
- .name = "PQ2 ADS PCI",
- .irq_mask = pq2ads_pci_mask_irq,
- .irq_mask_ack = pq2ads_pci_mask_irq,
- .irq_ack = pq2ads_pci_mask_irq,
- .irq_unmask = pq2ads_pci_unmask_irq,
- .irq_enable = pq2ads_pci_unmask_irq,
- .irq_disable = pq2ads_pci_mask_irq
-};
-
-static void pq2ads_pci_irq_demux(struct irq_desc *desc)
-{
- struct pq2ads_pci_pic *priv = irq_desc_get_handler_data(desc);
- u32 stat, mask, pend;
- int bit;
-
- for (;;) {
- stat = in_be32(&priv->regs->stat);
- mask = in_be32(&priv->regs->mask);
-
- pend = stat & ~mask;
-
- if (!pend)
- break;
-
- for (bit = 0; pend != 0; ++bit, pend <<= 1) {
- if (pend & 0x80000000)
- generic_handle_domain_irq(priv->host, bit);
- }
- }
-}
-
-static int pci_pic_host_map(struct irq_domain *h, unsigned int virq,
- irq_hw_number_t hw)
-{
- irq_set_status_flags(virq, IRQ_LEVEL);
- irq_set_chip_data(virq, h->host_data);
- irq_set_chip_and_handler(virq, &pq2ads_pci_ic, handle_level_irq);
- return 0;
-}
-
-static const struct irq_domain_ops pci_pic_host_ops = {
- .map = pci_pic_host_map,
-};
-
-int __init pq2ads_pci_init_irq(void)
-{
- struct pq2ads_pci_pic *priv;
- struct irq_domain *host;
- struct device_node *np;
- int ret = -ENODEV;
- int irq;
-
- np = of_find_compatible_node(NULL, NULL, "fsl,pq2ads-pci-pic");
- if (!np) {
- printk(KERN_ERR "No pci pic node in device tree.\n");
- goto out;
- }
-
- irq = irq_of_parse_and_map(np, 0);
- if (!irq) {
- printk(KERN_ERR "No interrupt in pci pic node.\n");
- goto out_put_node;
- }
-
- priv = kzalloc(sizeof(*priv), GFP_KERNEL);
- if (!priv) {
- ret = -ENOMEM;
- goto out_unmap_irq;
- }
-
- /* PCI interrupt controller registers: status and mask */
- priv->regs = of_iomap(np, 0);
- if (!priv->regs) {
- printk(KERN_ERR "Cannot map PCI PIC registers.\n");
- goto out_free_kmalloc;
- }
-
- /* mask all PCI interrupts */
- out_be32(&priv->regs->mask, ~0);
- mb();
-
- host = irq_domain_add_linear(np, NUM_IRQS, &pci_pic_host_ops, priv);
- if (!host) {
- ret = -ENOMEM;
- goto out_unmap_regs;
- }
-
- priv->host = host;
- irq_set_handler_data(irq, priv);
- irq_set_chained_handler(irq, pq2ads_pci_irq_demux);
- ret = 0;
- goto out_put_node;
-
-out_unmap_regs:
- iounmap(priv->regs);
-out_free_kmalloc:
- kfree(priv);
-out_unmap_irq:
- irq_dispose_mapping(irq);
-out_put_node:
- of_node_put(np);
-out:
- return ret;
-}
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * PQ2/mpc8260 board-specific stuff
- *
- * A collection of structures, addresses, and values associated with
- * the Freescale MPC8260ADS/MPC8266ADS-PCI boards.
- * Copied from the RPX-Classic and SBS8260 stuff.
- *
- * Author: Vitaly Bordug <vbordug@ru.mvista.com>
- *
- * Originally written by Dan Malek for Motorola MPC8260 family
- *
- * Copyright (c) 2001 Dan Malek <dan@embeddedalley.com>
- * Copyright (c) 2006 MontaVista Software, Inc.
- */
-
-#ifdef __KERNEL__
-#ifndef __MACH_ADS8260_DEFS
-#define __MACH_ADS8260_DEFS
-
-#include <linux/seq_file.h>
-
-/* The ADS8260 has 16, 32-bit wide control/status registers, accessed
- * only on word boundaries.
- * Not all are used (yet), or are interesting to us (yet).
- */
-
-/* Things of interest in the CSR.
- */
-#define BCSR0_LED0 ((uint)0x02000000) /* 0 == on */
-#define BCSR0_LED1 ((uint)0x01000000) /* 0 == on */
-#define BCSR1_FETHIEN ((uint)0x08000000) /* 0 == enable*/
-#define BCSR1_FETH_RST ((uint)0x04000000) /* 0 == reset */
-#define BCSR1_RS232_EN1 ((uint)0x02000000) /* 0 ==enable */
-#define BCSR1_RS232_EN2 ((uint)0x01000000) /* 0 ==enable */
-#define BCSR3_FETHIEN2 ((uint)0x10000000) /* 0 == enable*/
-#define BCSR3_FETH2_RST ((uint)0x80000000) /* 0 == reset */
-
-#endif /* __MACH_ADS8260_DEFS */
-#endif /* __KERNEL__ */
projects / platform / kernel / linux-rpi.git / commitdiff