From 1306abec905df1ff5cf2b1d91ac0d94d18d96c5b Mon Sep 17 00:00:00 2001
From: Cliff Brake <cbrake@happy.dev.bec-systems.com>
Date: Fri, 20 Jul 2007 19:00:07 -0400
Subject: [PATCH] cm-x270-it8152

---
 arch/arm/common/Makefile          |    1 +
 arch/arm/common/it8152.c          |  272 +++++++++++++++++++++++++++++++++++++
 arch/arm/kernel/bios32.c          |   28 ++++-
 include/asm-arm/hardware/it8152.h |  104 ++++++++++++++
 include/asm-arm/pci.h             |    7 +
 include/linux/pci_ids.h           |    1 +
 6 files changed, 410 insertions(+), 3 deletions(-)
 create mode 100644 arch/arm/common/it8152.c
 create mode 100644 include/asm-arm/hardware/it8152.h

diff --git a/arch/arm/common/Makefile b/arch/arm/common/Makefile
index e1289a2..3d0b9fa 100644
--- a/arch/arm/common/Makefile
+++ b/arch/arm/common/Makefile
@@ -17,3 +17,4 @@ obj-$(CONFIG_SHARPSL_PM)	+= sharpsl_pm.o
 obj-$(CONFIG_SHARP_SCOOP)	+= scoop.o
 obj-$(CONFIG_ARCH_IXP2000)	+= uengine.o
 obj-$(CONFIG_ARCH_IXP23XX)	+= uengine.o
+obj-$(CONFIG_PCI_HOST_ITE8152)  += it8152.o
diff --git a/arch/arm/common/it8152.c b/arch/arm/common/it8152.c
new file mode 100644
index 0000000..8563610
--- /dev/null
+++ b/arch/arm/common/it8152.c
@@ -0,0 +1,272 @@
+/*
+ * arch/arm/common/it8152.c: PCI functions for IT8152
+ *
+ * Compulab Ltd, 2002-2006
+ *
+ * The DMA bouncing is taken from arch/arm/mach-ixp4xx/common-pci.c
+ * (see this file for respective copyrights)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#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/slab.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <asm/mach/map.h>
+
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/mach/pci.h>
+#include <asm/hardware/it8152.h>
+
+#define MAX_SLOTS		21
+
+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;
+
+#ifdef CONFIG_MACH_ARMCORE
+	if(devfn!=0) IT8152_GPIO_GPLR=0x00;
+#endif	
+	shift = (where & 3);
+
+	IT8152_PCI_CFG_ADDR = (addr + where);
+	v = (IT8152_PCI_CFG_DATA  >> (8 * (shift)));	
+
+	*value = v;
+
+#ifdef CONFIG_MACH_ARMCORE
+	if(devfn!=0) IT8152_GPIO_GPLR=0x20;
+#endif	
+
+	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;
+
+#ifdef CONFIG_MACH_ARMCORE
+	if(devfn!=0) IT8152_GPIO_GPLR=0x00;
+#endif
+
+	if(size==1) mask=0xff;
+	if(size==2) mask=0xffff;
+
+	shift = (where & 3);
+
+	IT8152_PCI_CFG_ADDR = addr + where;
+	vtemp = IT8152_PCI_CFG_DATA;
+
+	if(mask) vtemp &= ~(mask << (8 * shift));
+	else vtemp = 0;
+
+	v = (value << (8 * shift));
+	IT8152_PCI_CFG_ADDR = addr + where;
+	IT8152_PCI_CFG_DATA  = (v | vtemp);
+
+#ifdef CONFIG_MACH_ARMCORE
+	if(devfn!=0) IT8152_GPIO_GPLR=0x20;
+#endif
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static 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_mem1 = {
+	.name	= "First IT8152 PCI memory region",
+	.start	= 0x10000000,
+	.end	= 0x13e00000,
+	.flags	= IORESOURCE_MEM,
+};
+
+/*
+ * The following functions are needed for DMA bouncing.
+ * ITE8152 chip can addrees up to 64MByte, so all the devices
+ * connected to ITE8152 (PCI and USB) should have limited DMA window
+ */
+
+/*
+ * 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->bus == &pci_bus_type ) {
+		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);
+	}
+	return 0;
+}
+
+static int it8152_pci_platform_notify_remove(struct device *dev)
+{
+	if ( dev->bus == &pci_bus_type ) {
+		dmabounce_unregister_dev(dev);
+	}
+	return 0;
+}
+
+int dma_needs_bounce(struct device *dev, dma_addr_t dma_addr, size_t size)
+{
+	dev_dbg(dev, "%s: dma_addr %08x, size %08x\n",
+		__FUNCTION__, dma_addr, size);
+	return (dev->bus == &pci_bus_type ) && 
+		((dma_addr + size - PHYS_OFFSET) >= SZ_64M);
+}
+
+/*
+ * Only first 64MB of memory can be accessed via PCI.
+ * We use GFP_DMA to allocate safe buffers to do map/unmap.
+ * This is really ugly and we need a better way of specifying
+ * DMA-capable regions of memory.
+ */
+void __init it8152_adjust_zones(int node, unsigned long *zone_size,
+	unsigned long *zhole_size)
+{
+	unsigned int sz = SZ_64M >> PAGE_SHIFT;
+
+	/*
+	 * Only adjust if > 64M on current system
+	 */
+	if (node || (zone_size[0] <= sz))
+		return;
+
+	zone_size[1] = zone_size[0] - sz;
+	zone_size[0] = sz;
+	zhole_size[1] = zhole_size[0];
+	zhole_size[0] = 0;
+}
+
+/*
+ * We override these so we properly do dmabounce otherwise drivers
+ * are able to set the dma_mask to 0xffffffff and we can no longer
+ * trap bounces. :(
+ *
+ * We just return true on everyhing except for < 64MB in which case 
+ * we will fail miseralby and die since we can't handle that case.
+ */
+int
+pci_set_dma_mask(struct pci_dev *dev, u64 mask)
+{
+	printk(KERN_INFO "===> %s: %s %x\n", __FUNCTION__, dev->dev.bus_id, mask);
+	if (mask >= PHYS_OFFSET + SZ_64M - 1 )
+		return 0;
+
+	return -EIO;
+}
+    
+int
+pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
+{
+	printk(KERN_INFO "===> %s: %s %x\n", __FUNCTION__, dev->dev.bus_id, mask);
+	if (mask >= PHYS_OFFSET + SZ_64M - 1 )
+		return 0;
+
+	return -EIO;
+}
+
+EXPORT_SYMBOL(pci_set_dma_mask);
+EXPORT_SYMBOL(pci_set_consistent_dma_mask);
+
+
+int __init it8152_pci_setup(int nr, struct pci_sys_data *sys)
+{
+	it8152_io.start = IT8152_IO_BASE + 0x12000;
+ 	it8152_io.end	= IT8152_IO_BASE + 0x100000;
+
+	if (request_resource(&ioport_resource, &it8152_io)) {
+		printk(KERN_ERR "PCI: unable to allocate IO region\n");
+		return -EBUSY;
+	}
+	if (request_resource(&iomem_resource, &it8152_mem1)) {
+		printk(KERN_ERR "PCI: unable to allocate memory region\n");
+		return -EBUSY;
+	}
+
+	sys->resource[0] = &it8152_io;
+	sys->resource[1] = &it8152_mem1;
+
+	if (platform_notify || platform_notify_remove) {
+		printk(KERN_ERR "PCI: Can't use platform_notify\n");
+		return -EBUSY;
+	}
+
+	platform_notify = it8152_pci_platform_notify;
+	platform_notify_remove = it8152_pci_platform_notify_remove;
+
+	return 1;  
+}
+			  
+/*
+ * If we set up a device for bus mastering, we need to check the latency
+ * timer as we don't have even crappy BIOSes to set it properly.
+ * The implementation is from arch/i386/pci/i386.c
+ */
+unsigned int pcibios_max_latency = 255;
+
+void pcibios_set_master(struct pci_dev *dev)
+{
+	u8 lat;
+
+	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);
+}
+
+
+struct pci_bus * __init it8152_pci_scan_bus(int nr, struct pci_sys_data *sys)
+{
+	return pci_scan_bus(nr, &it8152_ops, sys);
+}
+
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index 240c448..d8d2352 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -279,6 +279,25 @@ static void __devinit 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 __init 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);
+
+
+
 void __devinit pcibios_update_irq(struct pci_dev *dev, int irq)
 {
 	if (debug_pci)
@@ -292,9 +311,12 @@ void __devinit pcibios_update_irq(struct pci_dev *dev, int irq)
  */
 static inline int pdev_bad_for_parity(struct pci_dev *dev)
 {
-	return (dev->vendor == PCI_VENDOR_ID_INTERG &&
-		(dev->device == PCI_DEVICE_ID_INTERG_2000 ||
-		 dev->device == PCI_DEVICE_ID_INTERG_2010));
+	return ((dev->vendor == PCI_VENDOR_ID_INTERG &&
+		 (dev->device == PCI_DEVICE_ID_INTERG_2000 ||
+		  dev->device == PCI_DEVICE_ID_INTERG_2010)) ||
+		(dev->vendor == PCI_VENDOR_ID_ITE &&
+		 dev->device == PCI_DEVICE_ID_ITE_8152));
+
 }
 
 /*
diff --git a/include/asm-arm/hardware/it8152.h b/include/asm-arm/hardware/it8152.h
new file mode 100644
index 0000000..d28210d
--- /dev/null
+++ b/include/asm-arm/hardware/it8152.h
@@ -0,0 +1,104 @@
+/*
+ *  arch/arm/mach-pxa/it8152.h
+ *
+ *  Compulab Ltd., 2006
+ *
+ *  ITE 8152 companion chip definitions
+ */
+
+
+/* #define CMX270_IT8152_VIRT		(CMX270_VIRT_BASE) */
+
+
+extern unsigned long it8152_base_address;
+
+#define IT8152_IO_BASE			(it8152_base_address + 0x03e00000)
+#define IT8152_CFGREG_BASE		(it8152_base_address + 0x03f00000)
+
+/* #define IRQ_GPIO_IT8152_IRQ		IRQ_GPIO(GPIO_IT8152_IRQ) */
+
+#define IT8152_SHORT_IO(x)		(*((volatile unsigned short *)(IT8152_CFGREG_BASE+(x))))
+#define IT8152_LONG_IO(x)		(*((volatile unsigned long *)(IT8152_CFGREG_BASE+(x))))
+
+
+#define IT8152_PCI_MEMBASE		(*((volatile unsigned long *)(it8152_base_address)))
+/* #define IT8152_PCI_IOBASE		(*((volatile unsigned long *)(it8152_base_address + 0x3e00000))) */
+
+#define IT8152_PCI_IACK			(*((volatile unsigned long *)(it8152_base_address + 0x3f00808)))
+#define IT8152_PCI_CFG_ADDR		(*((volatile unsigned long *)(it8152_base_address + 0x3f00800)))
+#define IT8152_PCI_CFG_DATA		(*((volatile unsigned long *)(it8152_base_address + 0x3f00804)))
+
+#define IT_BUSNUM_SHF                   16
+#define IT_DEVNUM_SHF                   11
+#define IT_FUNCNUM_SHF                  8
+#define IT_REGNUM_SHF                   2
+
+/* Power management & PLL registers */
+#define IT8152_PMPLL_DSR		IT8152_LONG_IO(0x00)
+#define IT8152_PMPLL_DSSR		IT8152_LONG_IO(0x04)
+#define IT8152_PMPLL_PLLCR		IT8152_LONG_IO(0x20)
+#define IT8152_PMPLL_MFSR		IT8152_LONG_IO(0x24)
+
+/* Memory controller */
+#define IT8152_MC_REG_OFFSET		0x100
+
+#define IT8152_MC_SDCR			IT8152_LONG_IO(IT8152_MC_REG_OFFSET + 0x00)
+#define IT8152_MC_PCICR			IT8152_LONG_IO(IT8152_MC_REG_OFFSET + 0x04)
+
+/* Interrupt related definitions */
+#define IT8152_INTC_REG_OFFSET		0x300
+
+#define IT8152_INTC_LDCNIRR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x00)
+#define IT8152_INTC_LDPNIRR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x04)
+#define IT8152_INTC_LDCNIMR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x08)
+#define IT8152_INTC_LDPNIMR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x0C)
+#define IT8152_INTC_LDNITR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x10)
+#define IT8152_INTC_LDNIAR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x14)
+#define IT8152_INTC_LPCNIRR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x20)
+#define IT8152_INTC_LPPNIRR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x24)
+#define IT8152_INTC_LPCNIMR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x28)
+#define IT8152_INTC_LPPNIMR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x2C)
+#define IT8152_INTC_LPNITR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x30)
+#define IT8152_INTC_LPNIAR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x34)
+#define IT8152_INTC_PDCNIRR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x40)
+#define IT8152_INTC_PDPNIRR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x44)
+#define IT8152_INTC_PDCNIMR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x48)
+#define IT8152_INTC_PDPNIMR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x4C)
+#define IT8152_INTC_PDNITR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x50)
+#define IT8152_INTC_PDNIAR		IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0x54)
+#define IT8152_INTC_INTC_TYPER	IT8152_LONG_IO(IT8152_INTC_REG_OFFSET + 0xFC)
+
+#define IT8152_UART_BASE		IT8152_LONG_IO(0x200)
+
+#define IT8152_GPIO_REG_OFFSET		0x500
+
+#define IT8152_GPIO_GPLR		IT8152_LONG_IO(IT8152_GPIO_REG_OFFSET)
+#define IT8152_GPIO_GPCR12		IT8152_LONG_IO(IT8152_GPIO_REG_OFFSET + 0x04)
+#define IT8152_GPIO_GPCR34		IT8152_LONG_IO(IT8152_GPIO_REG_OFFSET + 0x08)
+
+
+/* Interrupt bit definitions */
+#define PCISERR_BIT		(1<<14)
+#define H2PTADR_BIT		(1<<13)
+#define H2PMAR_BIT		(1<<12)
+#define PCI_INTD_BIT	(1<<11)
+#define PCI_INTC_BIT	(1<<10)
+#define PCI_INTB_BIT	(1<<9)
+#define PCI_INTA_BIT	(1<<8)
+#define CDMA_INT_BIT	(1<<2)
+#define USB_INT_BIT		(1<<1)
+#define AUDIO_INT_BIT	(1<<0)
+
+/* IT8152 UART */
+#define ITESER_BIT		(1<<5)
+
+
+
+
+
+
+
+
+
+ 
+
diff --git a/include/asm-arm/pci.h b/include/asm-arm/pci.h
index f21abd4..2cf30bf 100644
--- a/include/asm-arm/pci.h
+++ b/include/asm-arm/pci.h
@@ -8,10 +8,17 @@
 
 #define pcibios_scan_all_fns(a, b)	0
 
+#ifdef CONFIG_PCI_HOST_ITE8152
+/* ITE bridge requires setting latency timer to avoid early bus access
+   termination by PIC bus mater devices
+*/
+extern void pcibios_set_master(struct pci_dev *dev);
+#else
 static inline void pcibios_set_master(struct pci_dev *dev)
 {
 	/* No special bus mastering setup handling */
 }
+#endif
 
 static inline void pcibios_penalize_isa_irq(int irq, int active)
 {
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 5b1c999..b4c81d5 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -1650,6 +1650,7 @@
 #define PCI_DEVICE_ID_ITE_8211		0x8211
 #define PCI_DEVICE_ID_ITE_8212		0x8212
 #define PCI_DEVICE_ID_ITE_8213		0x8213
+#define PCI_DEVICE_ID_ITE_8152		0x8152
 #define PCI_DEVICE_ID_ITE_8872		0x8872
 #define PCI_DEVICE_ID_ITE_IT8330G_0	0xe886
 
-- 
1.5.1.6

