summaryrefslogtreecommitdiff
path: root/arch/arm/common/it8152.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/common/it8152.c')
-rw-r--r--arch/arm/common/it8152.c352
1 files changed, 0 insertions, 352 deletions
diff --git a/arch/arm/common/it8152.c b/arch/arm/common/it8152.c
deleted file mode 100644
index 9ec740cac469..000000000000
--- a/arch/arm/common/it8152.c
+++ /dev/null
@@ -1,352 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * linux/arch/arm/common/it8152.c
- *
- * Copyright Compulab Ltd, 2002-2007
- * Mike Rapoport <mike@compulab.co.il>
- *
- * The DMA bouncing part is taken from arch/arm/mach-ixp4xx/common-pci.c
- * (see this file for respective copyrights)
- *
- * Thanks to Guennadi Liakhovetski <gl@dsa-ac.de> for IRQ enumberation
- * and demux code.
- */
-
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/pci.h>
-#include <linux/ptrace.h>
-#include <linux/interrupt.h>
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <linux/export.h>
-
-#include <asm/mach/pci.h>
-#include <asm/hardware/it8152.h>
-
-#define MAX_SLOTS 21
-
-static void it8152_mask_irq(struct irq_data *d)
-{
- unsigned int irq = d->irq;
-
- if (irq >= IT8152_LD_IRQ(0)) {
- __raw_writel((__raw_readl(IT8152_INTC_LDCNIMR) |
- (1 << (irq - IT8152_LD_IRQ(0)))),
- IT8152_INTC_LDCNIMR);
- } else if (irq >= IT8152_LP_IRQ(0)) {
- __raw_writel((__raw_readl(IT8152_INTC_LPCNIMR) |
- (1 << (irq - IT8152_LP_IRQ(0)))),
- IT8152_INTC_LPCNIMR);
- } else if (irq >= IT8152_PD_IRQ(0)) {
- __raw_writel((__raw_readl(IT8152_INTC_PDCNIMR) |
- (1 << (irq - IT8152_PD_IRQ(0)))),
- IT8152_INTC_PDCNIMR);
- }
-}
-
-static void it8152_unmask_irq(struct irq_data *d)
-{
- unsigned int irq = d->irq;
-
- if (irq >= IT8152_LD_IRQ(0)) {
- __raw_writel((__raw_readl(IT8152_INTC_LDCNIMR) &
- ~(1 << (irq - IT8152_LD_IRQ(0)))),
- IT8152_INTC_LDCNIMR);
- } else if (irq >= IT8152_LP_IRQ(0)) {
- __raw_writel((__raw_readl(IT8152_INTC_LPCNIMR) &
- ~(1 << (irq - IT8152_LP_IRQ(0)))),
- IT8152_INTC_LPCNIMR);
- } else if (irq >= IT8152_PD_IRQ(0)) {
- __raw_writel((__raw_readl(IT8152_INTC_PDCNIMR) &
- ~(1 << (irq - IT8152_PD_IRQ(0)))),
- IT8152_INTC_PDCNIMR);
- }
-}
-
-static struct irq_chip it8152_irq_chip = {
- .name = "it8152",
- .irq_ack = it8152_mask_irq,
- .irq_mask = it8152_mask_irq,
- .irq_unmask = it8152_unmask_irq,
-};
-
-void it8152_init_irq(void)
-{
- int irq;
-
- __raw_writel((0xffff), IT8152_INTC_PDCNIMR);
- __raw_writel((0), IT8152_INTC_PDCNIRR);
- __raw_writel((0xffff), IT8152_INTC_LPCNIMR);
- __raw_writel((0), IT8152_INTC_LPCNIRR);
- __raw_writel((0xffff), IT8152_INTC_LDCNIMR);
- __raw_writel((0), IT8152_INTC_LDCNIRR);
-
- for (irq = IT8152_IRQ(0); irq <= IT8152_LAST_IRQ; irq++) {
- irq_set_chip_and_handler(irq, &it8152_irq_chip,
- handle_level_irq);
- irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
- }
-}
-
-void it8152_irq_demux(struct irq_desc *desc)
-{
- int bits_pd, bits_lp, bits_ld;
- int i;
-
- while (1) {
- /* Read all */
- bits_pd = __raw_readl(IT8152_INTC_PDCNIRR);
- bits_lp = __raw_readl(IT8152_INTC_LPCNIRR);
- bits_ld = __raw_readl(IT8152_INTC_LDCNIRR);
-
- /* Ack */
- __raw_writel((~bits_pd), IT8152_INTC_PDCNIRR);
- __raw_writel((~bits_lp), IT8152_INTC_LPCNIRR);
- __raw_writel((~bits_ld), IT8152_INTC_LDCNIRR);
-
- if (!(bits_ld | bits_lp | bits_pd)) {
- /* Re-read to guarantee, that there was a moment of
- time, when they all three were 0. */
- bits_pd = __raw_readl(IT8152_INTC_PDCNIRR);
- bits_lp = __raw_readl(IT8152_INTC_LPCNIRR);
- bits_ld = __raw_readl(IT8152_INTC_LDCNIRR);
- if (!(bits_ld | bits_lp | bits_pd))
- return;
- }
-
- bits_pd &= ((1 << IT8152_PD_IRQ_COUNT) - 1);
- while (bits_pd) {
- i = __ffs(bits_pd);
- generic_handle_irq(IT8152_PD_IRQ(i));
- bits_pd &= ~(1 << i);
- }
-
- bits_lp &= ((1 << IT8152_LP_IRQ_COUNT) - 1);
- while (bits_lp) {
- i = __ffs(bits_lp);
- generic_handle_irq(IT8152_LP_IRQ(i));
- bits_lp &= ~(1 << i);
- }
-
- bits_ld &= ((1 << IT8152_LD_IRQ_COUNT) - 1);
- while (bits_ld) {
- i = __ffs(bits_ld);
- generic_handle_irq(IT8152_LD_IRQ(i));
- bits_ld &= ~(1 << i);
- }
- }
-}
-
-/* mapping for on-chip devices */
-int __init it8152_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
-{
- if ((dev->vendor == PCI_VENDOR_ID_ITE) &&
- (dev->device == PCI_DEVICE_ID_ITE_8152)) {
- if ((dev->class >> 8) == PCI_CLASS_MULTIMEDIA_AUDIO)
- return IT8152_AUDIO_INT;
- if ((dev->class >> 8) == PCI_CLASS_SERIAL_USB)
- return IT8152_USB_INT;
- if ((dev->class >> 8) == PCI_CLASS_SYSTEM_DMA)
- return IT8152_CDMA_INT;
- }
-
- return 0;
-}
-
-static unsigned long it8152_pci_dev_base_address(struct pci_bus *bus,
- unsigned int devfn)
-{
- unsigned long addr = 0;
-
- if (bus->number == 0) {
- if (devfn < PCI_DEVFN(MAX_SLOTS, 0))
- addr = (devfn << 8);
- } else
- addr = (bus->number << 16) | (devfn << 8);
-
- return addr;
-}
-
-static int it8152_pci_read_config(struct pci_bus *bus,
- unsigned int devfn, int where,
- int size, u32 *value)
-{
- unsigned long addr = it8152_pci_dev_base_address(bus, devfn);
- u32 v;
- int shift;
-
- shift = (where & 3);
-
- __raw_writel((addr + where), IT8152_PCI_CFG_ADDR);
- v = (__raw_readl(IT8152_PCI_CFG_DATA) >> (8 * (shift)));
-
- *value = v;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int it8152_pci_write_config(struct pci_bus *bus,
- unsigned int devfn, int where,
- int size, u32 value)
-{
- unsigned long addr = it8152_pci_dev_base_address(bus, devfn);
- u32 v, vtemp, mask = 0;
- int shift;
-
- if (size == 1)
- mask = 0xff;
- if (size == 2)
- mask = 0xffff;
-
- shift = (where & 3);
-
- __raw_writel((addr + where), IT8152_PCI_CFG_ADDR);
- vtemp = __raw_readl(IT8152_PCI_CFG_DATA);
-
- if (mask)
- vtemp &= ~(mask << (8 * shift));
- else
- vtemp = 0;
-
- v = (value << (8 * shift));
- __raw_writel((addr + where), IT8152_PCI_CFG_ADDR);
- __raw_writel((v | vtemp), IT8152_PCI_CFG_DATA);
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-struct pci_ops it8152_ops = {
- .read = it8152_pci_read_config,
- .write = it8152_pci_write_config,
-};
-
-static struct resource it8152_io = {
- .name = "IT8152 PCI I/O region",
- .flags = IORESOURCE_IO,
-};
-
-static struct resource it8152_mem = {
- .name = "IT8152 PCI memory region",
- .start = 0x10000000,
- .end = 0x13e00000,
- .flags = IORESOURCE_MEM,
-};
-
-/*
- * The following functions are needed for DMA bouncing.
- * ITE8152 chip can address up to 64MByte, so all the devices
- * connected to ITE8152 (PCI and USB) should have limited DMA window
- */
-static int it8152_needs_bounce(struct device *dev, dma_addr_t dma_addr, size_t size)
-{
- dev_dbg(dev, "%s: dma_addr %08x, size %08x\n",
- __func__, dma_addr, size);
- return (dma_addr + size - PHYS_OFFSET) >= SZ_64M;
-}
-
-/*
- * Setup DMA mask to 64MB on devices connected to ITE8152. Ignore all
- * other devices.
- */
-static int it8152_pci_platform_notify(struct device *dev)
-{
- if (dev_is_pci(dev)) {
- if (dev->dma_mask)
- *dev->dma_mask = (SZ_64M - 1) | PHYS_OFFSET;
- dev->coherent_dma_mask = (SZ_64M - 1) | PHYS_OFFSET;
- dmabounce_register_dev(dev, 2048, 4096, it8152_needs_bounce);
- }
- return 0;
-}
-
-static int it8152_pci_platform_notify_remove(struct device *dev)
-{
- if (dev_is_pci(dev))
- dmabounce_unregister_dev(dev);
-
- return 0;
-}
-
-int dma_set_coherent_mask(struct device *dev, u64 mask)
-{
- if (mask >= PHYS_OFFSET + SZ_64M - 1)
- return 0;
-
- return -EIO;
-}
-
-int __init it8152_pci_setup(int nr, struct pci_sys_data *sys)
-{
- /*
- * FIXME: use pci_ioremap_io to remap the IO space here and
- * move over to the generic io.h implementation.
- * This requires solving the same problem for PXA PCMCIA
- * support.
- */
- it8152_io.start = (unsigned long)IT8152_IO_BASE + 0x12000;
- it8152_io.end = (unsigned long)IT8152_IO_BASE + 0x12000 + 0x100000;
-
- sys->mem_offset = 0x10000000;
- sys->io_offset = (unsigned long)IT8152_IO_BASE;
-
- if (request_resource(&ioport_resource, &it8152_io)) {
- printk(KERN_ERR "PCI: unable to allocate IO region\n");
- goto err0;
- }
- if (request_resource(&iomem_resource, &it8152_mem)) {
- printk(KERN_ERR "PCI: unable to allocate memory region\n");
- goto err1;
- }
-
- pci_add_resource_offset(&sys->resources, &it8152_io, sys->io_offset);
- pci_add_resource_offset(&sys->resources, &it8152_mem, sys->mem_offset);
-
- if (platform_notify || platform_notify_remove) {
- printk(KERN_ERR "PCI: Can't use platform_notify\n");
- goto err2;
- }
-
- platform_notify = it8152_pci_platform_notify;
- platform_notify_remove = it8152_pci_platform_notify_remove;
-
- return 1;
-
-err2:
- release_resource(&it8152_io);
-err1:
- release_resource(&it8152_mem);
-err0:
- return -EBUSY;
-}
-
-/* ITE bridge requires setting latency timer to avoid early bus access
- termination by PCI bus master devices
-*/
-void pcibios_set_master(struct pci_dev *dev)
-{
- u8 lat;
-
- /* no need to update on-chip OHCI controller */
- if ((dev->vendor == PCI_VENDOR_ID_ITE) &&
- (dev->device == PCI_DEVICE_ID_ITE_8152) &&
- ((dev->class >> 8) == PCI_CLASS_SERIAL_USB))
- return;
-
- pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
- if (lat < 16)
- lat = (64 <= pcibios_max_latency) ? 64 : pcibios_max_latency;
- else if (lat > pcibios_max_latency)
- lat = pcibios_max_latency;
- else
- return;
- printk(KERN_DEBUG "PCI: Setting latency timer of device %s to %d\n",
- pci_name(dev), lat);
- pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
-}
-
-
-EXPORT_SYMBOL(dma_set_coherent_mask);
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-17 03:52:22 +0300