gemini: add support for 3.8

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35993 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 389 insertions, 0 deletions

diff --git a/target/linux/gemini/patches-3.8/140-arm-gemini-add-pci-support.patch b/target/linux/gemini/patches-3.8/140-arm-gemini-add-pci-support.patch
new file mode 100644
index 0000000000..82df3dfa15
--- /dev/null
+++ b/target/linux/gemini/patches-3.8/140-arm-gemini-add-pci-support.patch
@@ -0,0 +1,389 @@
+--- a/arch/arm/Kconfig
++++ b/arch/arm/Kconfig
+@@ -388,6 +388,7 @@ config ARCH_GEMINI
+ 	select ARCH_USES_GETTIMEOFFSET
+ 	select NEED_MACH_GPIO_H
+ 	select CPU_FA526
++	select MIGHT_HAVE_PCI
+ 	help
+ 	  Support for the Cortina Systems Gemini family SoCs
+ 
+--- a/arch/arm/mach-gemini/include/mach/hardware.h
++++ b/arch/arm/mach-gemini/include/mach/hardware.h
+@@ -71,4 +71,9 @@
+  */
+ #define IO_ADDRESS(x)	IOMEM((((x) & 0xFFF00000) >> 4) | ((x) & 0x000FFFFF) | 0xF0000000)
+ 
++/*
++ * PCI subsystem macros
++ */
++#define pcibios_assign_all_busses()	1
++
+ #endif
+--- a/arch/arm/mach-gemini/include/mach/irqs.h
++++ b/arch/arm/mach-gemini/include/mach/irqs.h
+@@ -43,11 +43,14 @@
+ 
+ #define NORMAL_IRQ_NUM	32
+ 
+-#define GPIO_IRQ_BASE	NORMAL_IRQ_NUM
++#define PCI_IRQ_BASE	NORMAL_IRQ_NUM
++#define PCI_IRQ_NUM	4
++
++#define GPIO_IRQ_BASE	(NORMAL_IRQ_NUM + PCI_IRQ_NUM)
+ #define GPIO_IRQ_NUM	(3 * 32)
+ 
+ #define ARCH_TIMER_IRQ	IRQ_TIMER2
+ 
+-#define NR_IRQS		(NORMAL_IRQ_NUM + GPIO_IRQ_NUM)
++#define NR_IRQS		(NORMAL_IRQ_NUM + PCI_IRQ_NUM + GPIO_IRQ_NUM)
+ 
+ #endif /* __MACH_IRQS_H__ */
+--- a/arch/arm/mach-gemini/Makefile
++++ b/arch/arm/mach-gemini/Makefile
+@@ -6,6 +6,8 @@
+ 
+ obj-y			:= irq.o mm.o time.o devices.o gpio.o idle.o reset.o
+ 
++obj-$(CONFIG_PCI)	+= pci.o
++
+ # Board-specific support
+ obj-$(CONFIG_MACH_NAS4220B)	+= board-nas4220b.o
+ obj-$(CONFIG_MACH_RUT100)	+= board-rut1xx.o
+--- a/arch/arm/mach-gemini/mm.c
++++ b/arch/arm/mach-gemini/mm.c
+@@ -59,6 +59,11 @@ static struct map_desc gemini_io_desc[]
+ 		.length		= SZ_512K,
+ 		.type 		= MT_DEVICE,
+ 	}, {
++		.virtual	= (unsigned long)IO_ADDRESS(GEMINI_PCI_IO_BASE),
++		.pfn		= __phys_to_pfn(GEMINI_PCI_IO_BASE),
++		.length		= SZ_512K,
++		.type 		= MT_DEVICE,
++	}, {
+ 		.virtual	= (unsigned long)IO_ADDRESS(GEMINI_FLASH_CTRL_BASE),
+ 		.pfn		= __phys_to_pfn(GEMINI_FLASH_CTRL_BASE),
+ 		.length		= SZ_512K,
+--- /dev/null
++++ b/arch/arm/mach-gemini/pci.c
+@@ -0,0 +1,320 @@
++/*
++ *  Support for Gemini PCI Controller
++ *
++ *  Copyright (C) 2009 Janos Laube <janos.dev@gmail.com>
++ *  Copyright (C) 2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
++ *
++ * based on SL2312 PCI controller code
++ *   Storlink (C) 2003
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ */
++
++#include <linux/kernel.h>
++#include <linux/pci.h>
++#include <linux/irq.h>
++#include <linux/gpio.h>
++
++#include <asm/mach/pci.h>
++
++#include <mach/irqs.h>
++#include <mach/hardware.h>
++
++#define GEMINI_PCI_IOSIZE_1M		0x0000
++
++#define GEMINI_PCI_PMC			0x40
++#define GEMINI_PCI_PMCSR		0x44
++#define GEMINI_PCI_CTRL1		0x48
++#define GEMINI_PCI_CTRL2		0x4C
++#define GEMINI_PCI_MEM1_BASE_SIZE	0x50
++#define GEMINI_PCI_MEM2_BASE_SIZE	0x54
++#define GEMINI_PCI_MEM3_BASE_SIZE	0x58
++
++#define PCI_CTRL2_INTSTS_OFFSET		28
++#define PCI_CTRL2_INTMASK_OFFSET	22
++
++#define GEMINI_PCI_DMA_MASK		0xFFF00000
++#define GEMINI_PCI_DMA_MEM1_BASE	0x00000000
++#define GEMINI_PCI_DMA_MEM2_BASE	0x00000000
++#define GEMINI_PCI_DMA_MEM3_BASE	0x00000000
++#define GEMINI_PCI_DMA_MEM1_SIZE	7
++#define GEMINI_PCI_DMA_MEM2_SIZE	6
++#define GEMINI_PCI_DMA_MEM3_SIZE	6
++
++#define PCI_CONF_ENABLE		(1 << 31)
++#define PCI_CONF_WHERE(r)	((r) & 0xFC)
++#define PCI_CONF_BUS(b)		(((b) & 0xFF) << 16)
++#define PCI_CONF_DEVICE(d)	(((d) & 0x1F) << 11)
++#define PCI_CONF_FUNCTION(f)	(((f) & 0x07) << 8)
++
++#define PCI_IOSIZE_REG	(IO_ADDRESS(GEMINI_PCI_IO_BASE))
++#define PCI_PROT_REG	(IO_ADDRESS(GEMINI_PCI_IO_BASE) + 0x04)
++#define PCI_CTRL_REG	(IO_ADDRESS(GEMINI_PCI_IO_BASE) + 0x08)
++#define PCI_SOFTRST_REG	(IO_ADDRESS(GEMINI_PCI_IO_BASE) + 0x10)
++#define PCI_CONFIG_REG	(IO_ADDRESS(GEMINI_PCI_IO_BASE) + 0x28)
++#define PCI_DATA_REG	(IO_ADDRESS(GEMINI_PCI_IO_BASE) + 0x2C)
++
++
++static DEFINE_SPINLOCK(gemini_pci_lock);
++
++static int gemini_pci_read_config(struct pci_bus* bus, unsigned int fn,
++				  int config, int size, u32* value)
++{
++	unsigned long irq_flags;
++
++	spin_lock_irqsave(&gemini_pci_lock, irq_flags);
++
++	__raw_writel(PCI_CONF_BUS(bus->number) |
++			PCI_CONF_DEVICE(PCI_SLOT(fn)) |
++			PCI_CONF_FUNCTION(PCI_FUNC(fn)) |
++			PCI_CONF_WHERE(config) |
++			PCI_CONF_ENABLE,
++			PCI_CONFIG_REG);
++
++	*value = __raw_readl(PCI_DATA_REG);
++
++	if (size == 1)
++		*value = (*value >> (8 * (config & 3))) & 0xFF;
++	else if (size == 2)
++		*value = (*value >> (8 * (config & 3))) & 0xFFFF;
++
++	spin_unlock_irqrestore(&gemini_pci_lock, irq_flags);
++
++	dev_dbg(&bus->dev,
++		"[read]  slt: %.2d, fnc: %d, cnf: 0x%.2X, val (%d bytes): 0x%.8X\n",
++		PCI_SLOT(fn), PCI_FUNC(fn), config, size, *value);
++
++	return PCIBIOS_SUCCESSFUL;
++}
++
++static int gemini_pci_write_config(struct pci_bus* bus, unsigned int fn,
++				   int config, int size, u32 value)
++{
++	unsigned long irq_flags = 0;
++	int ret = PCIBIOS_SUCCESSFUL;
++
++	dev_dbg(&bus->dev,
++		"[write] slt: %.2d, fnc: %d, cnf: 0x%.2X, val (%d bytes): 0x%.8X\n",
++		PCI_SLOT(fn), PCI_FUNC(fn), config, size, value);
++
++	spin_lock_irqsave(&gemini_pci_lock, irq_flags);
++
++	__raw_writel(PCI_CONF_BUS(bus->number) |
++			PCI_CONF_DEVICE(PCI_SLOT(fn)) |
++			PCI_CONF_FUNCTION(PCI_FUNC(fn)) |
++			PCI_CONF_WHERE(config) |
++			PCI_CONF_ENABLE,
++			PCI_CONFIG_REG);
++
++	switch(size) {
++	case 4:
++		__raw_writel(value, PCI_DATA_REG);
++		break;
++	case 2:
++		__raw_writew(value, PCI_DATA_REG + (config & 3));
++		break;
++	case 1:
++		__raw_writeb(value, PCI_DATA_REG + (config & 3));
++		break;
++	default:
++		ret = PCIBIOS_BAD_REGISTER_NUMBER;
++	}
++
++	spin_unlock_irqrestore(&gemini_pci_lock, irq_flags);
++
++	return ret;
++}
++
++static struct pci_ops gemini_pci_ops = {
++	.read	= gemini_pci_read_config,
++	.write	= gemini_pci_write_config,
++};
++
++static struct resource gemini_pci_resource_io = {
++	.name	= "PCI I/O Space",
++	.start	= GEMINI_PCI_IO_BASE,
++	.end	= GEMINI_PCI_IO_BASE + SZ_1M - 1,
++	.flags	= IORESOURCE_IO,
++};
++
++static struct resource gemini_pci_resource_mem = {
++	.name	= "PCI Memory Space",
++	.start	= GEMINI_PCI_MEM_BASE,
++	.end	= GEMINI_PCI_MEM_BASE + SZ_128M - 1,
++	.flags	= IORESOURCE_MEM,
++};
++
++static int __init gemini_pci_request_resources(struct pci_sys_data *sys)
++{
++	if (request_resource(&ioport_resource, &gemini_pci_resource_io))
++		goto bad_resources;
++	if (request_resource(&iomem_resource, &gemini_pci_resource_mem))
++		goto bad_resources;
++
++	pci_add_resource(&sys->resources, &gemini_pci_resource_io);
++	pci_add_resource(&sys->resources, &gemini_pci_resource_mem);
++
++	return 0;
++
++bad_resources:
++	pr_err("Gemini PCI: request_resource() failed. "
++			"Abort PCI bus enumeration.\n");
++	return -1;
++}
++
++static int __init gemini_pci_setup(int nr, struct pci_sys_data *sys)
++{
++	unsigned int cmd;
++
++	pcibios_min_io = 0x100;
++	pcibios_min_mem = 0;
++
++	if ((nr > 0) || gemini_pci_request_resources(sys))
++		return 0;
++
++	/* setup I/O space to 1MB size */
++	__raw_writel(GEMINI_PCI_IOSIZE_1M, PCI_IOSIZE_REG);
++
++	/* setup hostbridge */
++	cmd = __raw_readl(PCI_CTRL_REG);
++	cmd |= PCI_COMMAND_IO;
++	cmd |= PCI_COMMAND_MEMORY;
++	cmd |= PCI_COMMAND_MASTER;
++	__raw_writel(cmd, PCI_CTRL_REG);
++
++	return 1;
++}
++
++static struct pci_bus* __init gemini_pci_scan_bus(int nr, struct pci_sys_data* sys)
++{
++	unsigned int reg = 0;
++	struct pci_bus* bus = 0;
++
++	bus = pci_scan_bus(nr, &gemini_pci_ops, sys);
++	if (bus) {
++		dev_dbg(&bus->dev, "setting up PCI DMA\n");
++		reg = (GEMINI_PCI_DMA_MEM1_BASE & GEMINI_PCI_DMA_MASK)
++			| (GEMINI_PCI_DMA_MEM1_SIZE << 16);
++		gemini_pci_write_config(bus, 0, GEMINI_PCI_MEM1_BASE_SIZE, 4, reg);
++		reg =	(GEMINI_PCI_DMA_MEM2_BASE & GEMINI_PCI_DMA_MASK)
++			| (GEMINI_PCI_DMA_MEM2_SIZE << 16);
++		gemini_pci_write_config(bus, 0, GEMINI_PCI_MEM2_BASE_SIZE, 4, reg);
++		reg = (GEMINI_PCI_DMA_MEM3_BASE & GEMINI_PCI_DMA_MASK)
++			| (GEMINI_PCI_DMA_MEM3_SIZE << 16);
++		gemini_pci_write_config(bus, 0, GEMINI_PCI_MEM3_BASE_SIZE, 4, reg);
++	}
++
++	return bus;
++}
++
++/* Should work with all boards based on original Storlink EVB */
++static int __init gemini_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
++{
++	if (slot < 9 || slot > 12)
++		return -1;
++
++	return PCI_IRQ_BASE + (((slot - 9) + (pin - 1)) & 0x3);
++}
++
++static struct hw_pci gemini_hw_pci __initdata = {
++	.nr_controllers	= 1,
++	.setup		= gemini_pci_setup,
++	.scan           = gemini_pci_scan_bus,
++	.map_irq	= gemini_pci_map_irq,
++};
++
++/* we need this for muxed PCI interrupts handling */
++static struct pci_bus bogus_pci_bus;
++
++static void gemini_pci_ack_irq(struct irq_data *d)
++{
++	unsigned int irq = d->irq;
++	unsigned int reg;
++
++	gemini_pci_read_config(&bogus_pci_bus, 0, GEMINI_PCI_CTRL2, 4, &reg);
++	reg &= ~(0xF << PCI_CTRL2_INTSTS_OFFSET);
++	reg |= 1 << (irq - PCI_IRQ_BASE + PCI_CTRL2_INTSTS_OFFSET);
++	gemini_pci_write_config(&bogus_pci_bus, 0, GEMINI_PCI_CTRL2, 4, reg);
++}
++
++static void gemini_pci_mask_irq(struct irq_data *d)
++{
++	unsigned int irq = d->irq;
++	unsigned int reg;
++
++	gemini_pci_read_config(&bogus_pci_bus, 0, GEMINI_PCI_CTRL2, 4, &reg);
++	reg &= ~((0xF << PCI_CTRL2_INTSTS_OFFSET)
++		| (1 << (irq - PCI_IRQ_BASE + PCI_CTRL2_INTMASK_OFFSET)));
++	gemini_pci_write_config(&bogus_pci_bus, 0, GEMINI_PCI_CTRL2, 4, reg);
++}
++
++static void gemini_pci_unmask_irq(struct irq_data *d)
++{
++	unsigned int irq = d->irq;
++	unsigned int reg;
++
++	gemini_pci_read_config(&bogus_pci_bus, 0, GEMINI_PCI_CTRL2, 4, &reg);
++	reg &= ~(0xF << PCI_CTRL2_INTSTS_OFFSET);
++	reg |= 1 << (irq - PCI_IRQ_BASE + PCI_CTRL2_INTMASK_OFFSET);
++	gemini_pci_write_config(&bogus_pci_bus, 0, GEMINI_PCI_CTRL2, 4, reg);
++}
++
++static void gemini_pci_irq_handler(unsigned int irq, struct irq_desc *desc)
++{
++	unsigned int pci_irq_no, irq_stat, reg, i;
++
++	gemini_pci_read_config(&bogus_pci_bus, 0, GEMINI_PCI_CTRL2, 4, &reg);
++	irq_stat = reg >> PCI_CTRL2_INTSTS_OFFSET;
++
++	for (i = 0; i < 4; i++) {
++
++		if ((irq_stat & (1 << i)) == 0)
++			continue;
++
++		pci_irq_no = PCI_IRQ_BASE + i;
++
++		BUG_ON(!(irq_desc[pci_irq_no].handle_irq));
++		irq_desc[pci_irq_no].handle_irq(pci_irq_no,
++				&irq_desc[pci_irq_no]);
++	}
++}
++
++static struct irq_chip gemini_pci_irq_chip = {
++	.name = "PCI",
++	.irq_ack = gemini_pci_ack_irq,
++	.irq_mask = gemini_pci_mask_irq,
++	.irq_unmask = gemini_pci_unmask_irq,
++};
++
++static int __init gemini_pci_init(void)
++{
++	int i;
++
++	for (i = 72; i <= 95; i++)
++		gpio_request(i, "PCI");
++
++	/* initialize our bogus bus */
++	dev_set_name(&bogus_pci_bus.dev, "PCI IRQ handler");
++	bogus_pci_bus.number = 0;
++
++	/* mask and clear all interrupts */
++	gemini_pci_write_config(&bogus_pci_bus, 0, GEMINI_PCI_CTRL2 + 2, 2,
++				0xF000);
++
++	for (i = PCI_IRQ_BASE; i < PCI_IRQ_BASE + 4; i++) {
++		irq_set_chip_and_handler(i, &gemini_pci_irq_chip,
++					 handle_level_irq);
++		set_irq_flags(i, IRQF_VALID);
++	}
++
++	irq_set_chained_handler(IRQ_PCI, gemini_pci_irq_handler);
++
++	pci_common_init(&gemini_hw_pci);
++
++	return 0;
++}
++
++subsys_initcall(gemini_pci_init);