[PATCH] arm: remove it8152 PCI controller driver

[Mike Rapoport <rppt@kernel.org>]

From: Mike Rapoport <rppt@linux.ibm.com>

The it8152 PCI host controller was only used by cm-x2xx platforms.
Since these platforms were removed, there is no point to keep it8152
driver.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
---
 arch/arm/Kconfig                       |   6 -
 arch/arm/common/Makefile               |   1 -
 arch/arm/common/it8152.c               | 352 -------------------------
 arch/arm/include/asm/hardware/it8152.h | 116 --------
 arch/arm/kernel/bios32.c               |  17 --
 5 files changed, 492 deletions(-)
 delete mode 100644 arch/arm/common/it8152.c
 delete mode 100644 arch/arm/include/asm/hardware/it8152.h

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 2ac74904a3ce..fa1d1f36937a 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1148,12 +1148,6 @@ config PCI_NANOENGINE
 	help
 	  Enable PCI on the BSE nanoEngine board.
 
-config PCI_HOST_ITE8152
-	bool
-	depends on PCI && MACH_ARMCORE
-	default y
-	select DMABOUNCE
-
 config ARM_ERRATA_814220
 	bool "ARM errata: Cache maintenance by set/way operations can execute out of order"
 	depends on CPU_V7
diff --git a/arch/arm/common/Makefile b/arch/arm/common/Makefile
index 219a260bbe5f..8cd574be94cf 100644
--- a/arch/arm/common/Makefile
+++ b/arch/arm/common/Makefile
@@ -12,7 +12,6 @@ obj-$(CONFIG_SHARP_LOCOMO)	+= locomo.o
 obj-$(CONFIG_SHARP_PARAM)	+= sharpsl_param.o
 obj-$(CONFIG_SHARP_SCOOP)	+= scoop.o
 obj-$(CONFIG_CPU_V7)		+= secure_cntvoff.o
-obj-$(CONFIG_PCI_HOST_ITE8152)  += it8152.o
 obj-$(CONFIG_MCPM)		+= mcpm_head.o mcpm_entry.o mcpm_platsmp.o vlock.o
 CFLAGS_REMOVE_mcpm_entry.o	= -pg
 AFLAGS_mcpm_head.o		:= -march=armv7-a
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);
diff --git a/arch/arm/include/asm/hardware/it8152.h b/arch/arm/include/asm/hardware/it8152.h
deleted file mode 100644
index e175c2384f28..000000000000
--- a/arch/arm/include/asm/hardware/it8152.h
+++ /dev/null
@@ -1,116 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * linux/include/arm/hardware/it8152.h
- *
- * Copyright Compulab Ltd., 2006,2007
- * Mike Rapoport <mike@compulab.co.il>
- *
- * ITE 8152 companion chip register definitions
- */
-
-#ifndef __ASM_HARDWARE_IT8152_H
-#define __ASM_HARDWARE_IT8152_H
-
-#include <mach/irqs.h>
-
-extern void __iomem *it8152_base_address;
-
-#define IT8152_IO_BASE			(it8152_base_address + 0x03e00000)
-#define IT8152_CFGREG_BASE		(it8152_base_address + 0x03f00000)
-
-#define __REG_IT8152(x)			(it8152_base_address + (x))
-
-#define IT8152_PCI_CFG_ADDR		__REG_IT8152(0x3f00800)
-#define IT8152_PCI_CFG_DATA		__REG_IT8152(0x3f00804)
-
-#define IT8152_INTC_LDCNIRR		__REG_IT8152(0x3f00300)
-#define IT8152_INTC_LDPNIRR		__REG_IT8152(0x3f00304)
-#define IT8152_INTC_LDCNIMR		__REG_IT8152(0x3f00308)
-#define IT8152_INTC_LDPNIMR		__REG_IT8152(0x3f0030C)
-#define IT8152_INTC_LDNITR		__REG_IT8152(0x3f00310)
-#define IT8152_INTC_LDNIAR		__REG_IT8152(0x3f00314)
-#define IT8152_INTC_LPCNIRR		__REG_IT8152(0x3f00320)
-#define IT8152_INTC_LPPNIRR		__REG_IT8152(0x3f00324)
-#define IT8152_INTC_LPCNIMR		__REG_IT8152(0x3f00328)
-#define IT8152_INTC_LPPNIMR		__REG_IT8152(0x3f0032C)
-#define IT8152_INTC_LPNITR		__REG_IT8152(0x3f00330)
-#define IT8152_INTC_LPNIAR		__REG_IT8152(0x3f00334)
-#define IT8152_INTC_PDCNIRR		__REG_IT8152(0x3f00340)
-#define IT8152_INTC_PDPNIRR		__REG_IT8152(0x3f00344)
-#define IT8152_INTC_PDCNIMR		__REG_IT8152(0x3f00348)
-#define IT8152_INTC_PDPNIMR		__REG_IT8152(0x3f0034C)
-#define IT8152_INTC_PDNITR		__REG_IT8152(0x3f00350)
-#define IT8152_INTC_PDNIAR		__REG_IT8152(0x3f00354)
-#define IT8152_INTC_INTC_TYPER		__REG_IT8152(0x3f003FC)
-
-#define IT8152_GPIO_GPDR		__REG_IT8152(0x3f00500)
-
-/*
-  Interrupt controller per register summary:
-  ---------------------------------------
-  LCDNIRR:
-  IT8152_LD_IRQ(8) PCICLK stop
-  IT8152_LD_IRQ(7) MCLK ready
-  IT8152_LD_IRQ(6) s/w
-  IT8152_LD_IRQ(5) UART
-  IT8152_LD_IRQ(4) GPIO
-  IT8152_LD_IRQ(3) TIMER 4
-  IT8152_LD_IRQ(2) TIMER 3
-  IT8152_LD_IRQ(1) TIMER 2
-  IT8152_LD_IRQ(0) TIMER 1
-
-  LPCNIRR:
-  IT8152_LP_IRQ(x) serial IRQ x
-
-  PCIDNIRR:
-  IT8152_PD_IRQ(14) PCISERR
-  IT8152_PD_IRQ(13) CPU/PCI bridge target abort (h2pTADR)
-  IT8152_PD_IRQ(12) CPU/PCI bridge master abort (h2pMADR)
-  IT8152_PD_IRQ(11) PCI INTD
-  IT8152_PD_IRQ(10) PCI INTC
-  IT8152_PD_IRQ(9)  PCI INTB
-  IT8152_PD_IRQ(8)  PCI INTA
-  IT8152_PD_IRQ(7)  serial INTD
-  IT8152_PD_IRQ(6)  serial INTC
-  IT8152_PD_IRQ(5)  serial INTB
-  IT8152_PD_IRQ(4)  serial INTA
-  IT8152_PD_IRQ(3)  serial IRQ IOCHK (IOCHKR)
-  IT8152_PD_IRQ(2)  chaining DMA (CDMAR)
-  IT8152_PD_IRQ(1)  USB (USBR)
-  IT8152_PD_IRQ(0)  Audio controller (ACR)
- */
-#define IT8152_IRQ(x)   (IRQ_BOARD_START + (x))
-#define IT8152_LAST_IRQ	(IRQ_BOARD_START + 40)
-
-/* IRQ-sources in 3 groups - local devices, LPC (serial), and external PCI */
-#define IT8152_LD_IRQ_COUNT     9
-#define IT8152_LP_IRQ_COUNT     16
-#define IT8152_PD_IRQ_COUNT     15
-
-/* Priorities: */
-#define IT8152_PD_IRQ(i)        IT8152_IRQ(i)
-#define IT8152_LP_IRQ(i)        (IT8152_IRQ(i) + IT8152_PD_IRQ_COUNT)
-#define IT8152_LD_IRQ(i)        (IT8152_IRQ(i) + IT8152_PD_IRQ_COUNT + IT8152_LP_IRQ_COUNT)
-
-/* frequently used interrupts */
-#define IT8152_PCISERR		IT8152_PD_IRQ(14)
-#define IT8152_H2PTADR		IT8152_PD_IRQ(13)
-#define IT8152_H2PMAR		IT8152_PD_IRQ(12)
-#define IT8152_PCI_INTD		IT8152_PD_IRQ(11)
-#define IT8152_PCI_INTC		IT8152_PD_IRQ(10)
-#define IT8152_PCI_INTB		IT8152_PD_IRQ(9)
-#define IT8152_PCI_INTA		IT8152_PD_IRQ(8)
-#define IT8152_CDMA_INT		IT8152_PD_IRQ(2)
-#define IT8152_USB_INT		IT8152_PD_IRQ(1)
-#define IT8152_AUDIO_INT	IT8152_PD_IRQ(0)
-
-struct pci_dev;
-struct pci_sys_data;
-
-extern void it8152_irq_demux(struct irq_desc *desc);
-extern void it8152_init_irq(void);
-extern int it8152_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
-extern int it8152_pci_setup(int nr, struct pci_sys_data *sys);
-extern struct pci_ops it8152_ops;
-
-#endif /* __ASM_HARDWARE_IT8152_H */
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index ed46ca69813d..eecec16aa708 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -252,23 +252,6 @@ static void pci_fixup_cy82c693(struct pci_dev *dev)
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693, pci_fixup_cy82c693);
 
-static void pci_fixup_it8152(struct pci_dev *dev)
-{
-	int i;
-	/* fixup for ITE 8152 devices */
-	/* FIXME: add defines for class 0x68000 and 0x80103 */
-	if ((dev->class >> 8) == PCI_CLASS_BRIDGE_HOST ||
-	    dev->class == 0x68000 ||
-	    dev->class == 0x80103) {
-		for (i = 0; i < PCI_NUM_RESOURCES; i++) {
-			dev->resource[i].start = 0;
-			dev->resource[i].end   = 0;
-			dev->resource[i].flags = 0;
-		}
-	}
-}
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8152, pci_fixup_it8152);
-
 /*
  * If the bus contains any of these devices, then we must not turn on
  * parity checking of any kind.  Currently this is CyberPro 20x0 only.
-- 
2.26.2


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