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0c02c8007e
linux-next/arch/arm/mach-integrator/pci_v3.c
Grant Likely 0c02c8007e of/irq: Rename of_irq_map_* functions to of_irq_parse_* 
The OF irq handling code has been overloading the term 'map' to refer to
both parsing the data in the device tree and mapping it to the internal
linux irq system. This is probably because the device tree does have the
concept of an 'interrupt-map' function for translating interrupt
references from one node to another, but 'map' is still confusing when
the primary purpose of some of the functions are to parse the DT data.

This patch renames all the of_irq_map_* functions to of_irq_parse_*
which makes it clear that there is a difference between the parsing
phase and the mapping phase. Kernel code can make use of just the
parsing or just the mapping support as needed by the subsystem.

The patch was generated mechanically with a handful of sed commands.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
Acked-by: Michal Simek <monstr@monstr.eu>
Acked-by: Tony Lindgren <tony@atomide.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-24 11:40:59 +01:00

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/*
* linux/arch/arm/mach-integrator/pci_v3.c
*
* PCI functions for V3 host PCI bridge
*
* Copyright (C) 1999 ARM Limited
* Copyright (C) 2000-2001 Deep Blue Solutions Ltd
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_pci.h>
#include <video/vga.h>
#include <mach/hardware.h>
#include <mach/platform.h>
#include <mach/irqs.h>
#include <asm/mach/map.h>
#include <asm/signal.h>
#include <asm/mach/pci.h>
#include <asm/irq_regs.h>
#include "pci_v3.h"
/*
* Where in the memory map does PCI live?
*
* This represents a fairly liberal usage of address space. Even though
* the V3 only has two windows (therefore we need to map stuff on the fly),
* we maintain the same addresses, even if they're not mapped.
*/
#define PHYS_PCI_MEM_BASE 0x40000000 /* 256M */
#define PHYS_PCI_PRE_BASE 0x50000000 /* 256M */
#define PHYS_PCI_IO_BASE 0x60000000 /* 16M */
#define PHYS_PCI_CONFIG_BASE 0x61000000 /* 16M */
#define PHYS_PCI_V3_BASE 0x62000000 /* 64K */
#define PCI_MEMORY_VADDR IOMEM(0xe8000000)
#define PCI_CONFIG_VADDR IOMEM(0xec000000)
/*
* V3 Local Bus to PCI Bridge definitions
*
* Registers (these are taken from page 129 of the EPC User's Manual Rev 1.04
* All V3 register names are prefaced by V3_ to avoid clashing with any other
* PCI definitions. Their names match the user's manual.
*
* I'm assuming that I20 is disabled.
*
*/
#define V3_PCI_VENDOR 0x00000000
#define V3_PCI_DEVICE 0x00000002
#define V3_PCI_CMD 0x00000004
#define V3_PCI_STAT 0x00000006
#define V3_PCI_CC_REV 0x00000008
#define V3_PCI_HDR_CFG 0x0000000C
#define V3_PCI_IO_BASE 0x00000010
#define V3_PCI_BASE0 0x00000014
#define V3_PCI_BASE1 0x00000018
#define V3_PCI_SUB_VENDOR 0x0000002C
#define V3_PCI_SUB_ID 0x0000002E
#define V3_PCI_ROM 0x00000030
#define V3_PCI_BPARAM 0x0000003C
#define V3_PCI_MAP0 0x00000040
#define V3_PCI_MAP1 0x00000044
#define V3_PCI_INT_STAT 0x00000048
#define V3_PCI_INT_CFG 0x0000004C
#define V3_LB_BASE0 0x00000054
#define V3_LB_BASE1 0x00000058
#define V3_LB_MAP0 0x0000005E
#define V3_LB_MAP1 0x00000062
#define V3_LB_BASE2 0x00000064
#define V3_LB_MAP2 0x00000066
#define V3_LB_SIZE 0x00000068
#define V3_LB_IO_BASE 0x0000006E
#define V3_FIFO_CFG 0x00000070
#define V3_FIFO_PRIORITY 0x00000072
#define V3_FIFO_STAT 0x00000074
#define V3_LB_ISTAT 0x00000076
#define V3_LB_IMASK 0x00000077
#define V3_SYSTEM 0x00000078
#define V3_LB_CFG 0x0000007A
#define V3_PCI_CFG 0x0000007C
#define V3_DMA_PCI_ADR0 0x00000080
#define V3_DMA_PCI_ADR1 0x00000090
#define V3_DMA_LOCAL_ADR0 0x00000084
#define V3_DMA_LOCAL_ADR1 0x00000094
#define V3_DMA_LENGTH0 0x00000088
#define V3_DMA_LENGTH1 0x00000098
#define V3_DMA_CSR0 0x0000008B
#define V3_DMA_CSR1 0x0000009B
#define V3_DMA_CTLB_ADR0 0x0000008C
#define V3_DMA_CTLB_ADR1 0x0000009C
#define V3_DMA_DELAY 0x000000E0
#define V3_MAIL_DATA 0x000000C0
#define V3_PCI_MAIL_IEWR 0x000000D0
#define V3_PCI_MAIL_IERD 0x000000D2
#define V3_LB_MAIL_IEWR 0x000000D4
#define V3_LB_MAIL_IERD 0x000000D6
#define V3_MAIL_WR_STAT 0x000000D8
#define V3_MAIL_RD_STAT 0x000000DA
#define V3_QBA_MAP 0x000000DC
/* PCI COMMAND REGISTER bits
*/
#define V3_COMMAND_M_FBB_EN (1 << 9)
#define V3_COMMAND_M_SERR_EN (1 << 8)
#define V3_COMMAND_M_PAR_EN (1 << 6)
#define V3_COMMAND_M_MASTER_EN (1 << 2)
#define V3_COMMAND_M_MEM_EN (1 << 1)
#define V3_COMMAND_M_IO_EN (1 << 0)
/* SYSTEM REGISTER bits
*/
#define V3_SYSTEM_M_RST_OUT (1 << 15)
#define V3_SYSTEM_M_LOCK (1 << 14)
/* PCI_CFG bits
*/
#define V3_PCI_CFG_M_I2O_EN (1 << 15)
#define V3_PCI_CFG_M_IO_REG_DIS (1 << 14)
#define V3_PCI_CFG_M_IO_DIS (1 << 13)
#define V3_PCI_CFG_M_EN3V (1 << 12)
#define V3_PCI_CFG_M_RETRY_EN (1 << 10)
#define V3_PCI_CFG_M_AD_LOW1 (1 << 9)
#define V3_PCI_CFG_M_AD_LOW0 (1 << 8)
/* PCI_BASE register bits (PCI -> Local Bus)
*/
#define V3_PCI_BASE_M_ADR_BASE 0xFFF00000
#define V3_PCI_BASE_M_ADR_BASEL 0x000FFF00
#define V3_PCI_BASE_M_PREFETCH (1 << 3)
#define V3_PCI_BASE_M_TYPE (3 << 1)
#define V3_PCI_BASE_M_IO (1 << 0)
/* PCI MAP register bits (PCI -> Local bus)
*/
#define V3_PCI_MAP_M_MAP_ADR 0xFFF00000
#define V3_PCI_MAP_M_RD_POST_INH (1 << 15)
#define V3_PCI_MAP_M_ROM_SIZE (3 << 10)
#define V3_PCI_MAP_M_SWAP (3 << 8)
#define V3_PCI_MAP_M_ADR_SIZE 0x000000F0
#define V3_PCI_MAP_M_REG_EN (1 << 1)
#define V3_PCI_MAP_M_ENABLE (1 << 0)
/*
* LB_BASE0,1 register bits (Local bus -> PCI)
*/
#define V3_LB_BASE_ADR_BASE 0xfff00000
#define V3_LB_BASE_SWAP (3 << 8)
#define V3_LB_BASE_ADR_SIZE (15 << 4)
#define V3_LB_BASE_PREFETCH (1 << 3)
#define V3_LB_BASE_ENABLE (1 << 0)
#define V3_LB_BASE_ADR_SIZE_1MB (0 << 4)
#define V3_LB_BASE_ADR_SIZE_2MB (1 << 4)
#define V3_LB_BASE_ADR_SIZE_4MB (2 << 4)
#define V3_LB_BASE_ADR_SIZE_8MB (3 << 4)
#define V3_LB_BASE_ADR_SIZE_16MB (4 << 4)
#define V3_LB_BASE_ADR_SIZE_32MB (5 << 4)
#define V3_LB_BASE_ADR_SIZE_64MB (6 << 4)
#define V3_LB_BASE_ADR_SIZE_128MB (7 << 4)
#define V3_LB_BASE_ADR_SIZE_256MB (8 << 4)
#define V3_LB_BASE_ADR_SIZE_512MB (9 << 4)
#define V3_LB_BASE_ADR_SIZE_1GB (10 << 4)
#define V3_LB_BASE_ADR_SIZE_2GB (11 << 4)
#define v3_addr_to_lb_base(a) ((a) & V3_LB_BASE_ADR_BASE)
/*
* LB_MAP0,1 register bits (Local bus -> PCI)
*/
#define V3_LB_MAP_MAP_ADR 0xfff0
#define V3_LB_MAP_TYPE (7 << 1)
#define V3_LB_MAP_AD_LOW_EN (1 << 0)
#define V3_LB_MAP_TYPE_IACK (0 << 1)
#define V3_LB_MAP_TYPE_IO (1 << 1)
#define V3_LB_MAP_TYPE_MEM (3 << 1)
#define V3_LB_MAP_TYPE_CONFIG (5 << 1)
#define V3_LB_MAP_TYPE_MEM_MULTIPLE (6 << 1)
#define v3_addr_to_lb_map(a) (((a) >> 16) & V3_LB_MAP_MAP_ADR)
/*
* LB_BASE2 register bits (Local bus -> PCI IO)
*/
#define V3_LB_BASE2_ADR_BASE 0xff00
#define V3_LB_BASE2_SWAP (3 << 6)
#define V3_LB_BASE2_ENABLE (1 << 0)
#define v3_addr_to_lb_base2(a) (((a) >> 16) & V3_LB_BASE2_ADR_BASE)
/*
* LB_MAP2 register bits (Local bus -> PCI IO)
*/
#define V3_LB_MAP2_MAP_ADR 0xff00
#define v3_addr_to_lb_map2(a) (((a) >> 16) & V3_LB_MAP2_MAP_ADR)
/*
* The V3 PCI interface chip in Integrator provides several windows from
* local bus memory into the PCI memory areas. Unfortunately, there
* are not really enough windows for our usage, therefore we reuse
* one of the windows for access to PCI configuration space. The
* memory map is as follows:
*
* Local Bus Memory Usage
*
* 40000000 - 4FFFFFFF PCI memory. 256M non-prefetchable
* 50000000 - 5FFFFFFF PCI memory. 256M prefetchable
* 60000000 - 60FFFFFF PCI IO. 16M
* 61000000 - 61FFFFFF PCI Configuration. 16M
*
* There are three V3 windows, each described by a pair of V3 registers.
* These are LB_BASE0/LB_MAP0, LB_BASE1/LB_MAP1 and LB_BASE2/LB_MAP2.
* Base0 and Base1 can be used for any type of PCI memory access. Base2
* can be used either for PCI I/O or for I20 accesses. By default, uHAL
* uses this only for PCI IO space.
*
* Normally these spaces are mapped using the following base registers:
*
* Usage Local Bus Memory Base/Map registers used
*
* Mem 40000000 - 4FFFFFFF LB_BASE0/LB_MAP0
* Mem 50000000 - 5FFFFFFF LB_BASE1/LB_MAP1
* IO 60000000 - 60FFFFFF LB_BASE2/LB_MAP2
* Cfg 61000000 - 61FFFFFF
*
* This means that I20 and PCI configuration space accesses will fail.
* When PCI configuration accesses are needed (via the uHAL PCI
* configuration space primitives) we must remap the spaces as follows:
*
* Usage Local Bus Memory Base/Map registers used
*
* Mem 40000000 - 4FFFFFFF LB_BASE0/LB_MAP0
* Mem 50000000 - 5FFFFFFF LB_BASE0/LB_MAP0
* IO 60000000 - 60FFFFFF LB_BASE2/LB_MAP2
* Cfg 61000000 - 61FFFFFF LB_BASE1/LB_MAP1
*
* To make this work, the code depends on overlapping windows working.
* The V3 chip translates an address by checking its range within
* each of the BASE/MAP pairs in turn (in ascending register number
* order). It will use the first matching pair. So, for example,
* if the same address is mapped by both LB_BASE0/LB_MAP0 and
* LB_BASE1/LB_MAP1, the V3 will use the translation from
* LB_BASE0/LB_MAP0.
*
* To allow PCI Configuration space access, the code enlarges the
* window mapped by LB_BASE0/LB_MAP0 from 256M to 512M. This occludes
* the windows currently mapped by LB_BASE1/LB_MAP1 so that it can
* be remapped for use by configuration cycles.
*
* At the end of the PCI Configuration space accesses,
* LB_BASE1/LB_MAP1 is reset to map PCI Memory. Finally the window
* mapped by LB_BASE0/LB_MAP0 is reduced in size from 512M to 256M to
* reveal the now restored LB_BASE1/LB_MAP1 window.
*
* NOTE: We do not set up I2O mapping. I suspect that this is only
* for an intelligent (target) device. Using I2O disables most of
* the mappings into PCI memory.
*/
/* Filled in by probe */
static void __iomem *pci_v3_base;
/* CPU side memory ranges */
static struct resource conf_mem; /* FIXME: remap this instead of static map */
static struct resource io_mem;
static struct resource non_mem;
static struct resource pre_mem;
/* PCI side memory ranges */
static u64 non_mem_pci;
static u64 non_mem_pci_sz;
static u64 pre_mem_pci;
static u64 pre_mem_pci_sz;
// V3 access routines
#define v3_writeb(o,v) __raw_writeb(v, pci_v3_base + (unsigned int)(o))
#define v3_readb(o) (__raw_readb(pci_v3_base + (unsigned int)(o)))
#define v3_writew(o,v) __raw_writew(v, pci_v3_base + (unsigned int)(o))
#define v3_readw(o) (__raw_readw(pci_v3_base + (unsigned int)(o)))
#define v3_writel(o,v) __raw_writel(v, pci_v3_base + (unsigned int)(o))
#define v3_readl(o) (__raw_readl(pci_v3_base + (unsigned int)(o)))
/*============================================================================
*
* routine: uHALir_PCIMakeConfigAddress()
*
* parameters: bus = which bus
* device = which device
* function = which function
* offset = configuration space register we are interested in
*
* description: this routine will generate a platform dependent config
* address.
*
* calls: none
*
* returns: configuration address to play on the PCI bus
*
* To generate the appropriate PCI configuration cycles in the PCI
* configuration address space, you present the V3 with the following pattern
* (which is very nearly a type 1 (except that the lower two bits are 00 and
* not 01). In order for this mapping to work you need to set up one of
* the local to PCI aperatures to 16Mbytes in length translating to
* PCI configuration space starting at 0x0000.0000.
*
* PCI configuration cycles look like this:
*
* Type 0:
*
* 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
* 3 2|1 0 9 8|7 6 5 4|3 2 1 0|9 8 7 6|5 4 3 2|1 0 9 8|7 6 5 4|3 2 1 0
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | | |D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|0|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* 31:11 Device select bit.
* 10:8 Function number
* 7:2 Register number
*
* Type 1:
*
* 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
* 3 2|1 0 9 8|7 6 5 4|3 2 1 0|9 8 7 6|5 4 3 2|1 0 9 8|7 6 5 4|3 2 1 0
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | | | | | | | | | | |B|B|B|B|B|B|B|B|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|1|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* 31:24 reserved
* 23:16 bus number (8 bits = 128 possible buses)
* 15:11 Device number (5 bits)
* 10:8 function number
* 7:2 register number
*
*/
static DEFINE_RAW_SPINLOCK(v3_lock);
#undef V3_LB_BASE_PREFETCH
#define V3_LB_BASE_PREFETCH 0
static void __iomem *v3_open_config_window(struct pci_bus *bus,
unsigned int devfn, int offset)
{
unsigned int address, mapaddress, busnr;
busnr = bus->number;
/*
* Trap out illegal values
*/
BUG_ON(offset > 255);
BUG_ON(busnr > 255);
BUG_ON(devfn > 255);
if (busnr == 0) {
int slot = PCI_SLOT(devfn);
/*
* local bus segment so need a type 0 config cycle
*
* build the PCI configuration "address" with one-hot in
* A31-A11
*
* mapaddress:
* 3:1 = config cycle (101)
* 0 = PCI A1 & A0 are 0 (0)
*/
address = PCI_FUNC(devfn) << 8;
mapaddress = V3_LB_MAP_TYPE_CONFIG;
if (slot > 12)
/*
* high order bits are handled by the MAP register
*/
mapaddress |= 1 << (slot - 5);
else
/*
* low order bits handled directly in the address
*/
address |= 1 << (slot + 11);
} else {
/*
* not the local bus segment so need a type 1 config cycle
*
* address:
* 23:16 = bus number
* 15:11 = slot number (7:3 of devfn)
* 10:8 = func number (2:0 of devfn)
*
* mapaddress:
* 3:1 = config cycle (101)
* 0 = PCI A1 & A0 from host bus (1)
*/
mapaddress = V3_LB_MAP_TYPE_CONFIG | V3_LB_MAP_AD_LOW_EN;
address = (busnr << 16) | (devfn << 8);
}
/*
* Set up base0 to see all 512Mbytes of memory space (not
* prefetchable), this frees up base1 for re-use by
* configuration memory
*/
v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(non_mem.start) |
V3_LB_BASE_ADR_SIZE_512MB | V3_LB_BASE_ENABLE);
/*
* Set up base1/map1 to point into configuration space.
*/
v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(conf_mem.start) |
V3_LB_BASE_ADR_SIZE_16MB | V3_LB_BASE_ENABLE);
v3_writew(V3_LB_MAP1, mapaddress);
return PCI_CONFIG_VADDR + address + offset;
}
static void v3_close_config_window(void)
{
/*
* Reassign base1 for use by prefetchable PCI memory
*/
v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(pre_mem.start) |
V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_PREFETCH |
V3_LB_BASE_ENABLE);
v3_writew(V3_LB_MAP1, v3_addr_to_lb_map(pre_mem_pci) |
V3_LB_MAP_TYPE_MEM_MULTIPLE);
/*
* And shrink base0 back to a 256M window (NOTE: MAP0 already correct)
*/
v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(non_mem.start) |
V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_ENABLE);
}
static int v3_read_config(struct pci_bus *bus, unsigned int devfn, int where,
int size, u32 *val)
{
void __iomem *addr;
unsigned long flags;
u32 v;
raw_spin_lock_irqsave(&v3_lock, flags);
addr = v3_open_config_window(bus, devfn, where);
switch (size) {
case 1:
v = __raw_readb(addr);
break;
case 2:
v = __raw_readw(addr);
break;
default:
v = __raw_readl(addr);
break;
}
v3_close_config_window();
raw_spin_unlock_irqrestore(&v3_lock, flags);
*val = v;
return PCIBIOS_SUCCESSFUL;
}
static int v3_write_config(struct pci_bus *bus, unsigned int devfn, int where,
int size, u32 val)
{
void __iomem *addr;
unsigned long flags;
raw_spin_lock_irqsave(&v3_lock, flags);
addr = v3_open_config_window(bus, devfn, where);
switch (size) {
case 1:
__raw_writeb((u8)val, addr);
__raw_readb(addr);
break;
case 2:
__raw_writew((u16)val, addr);
__raw_readw(addr);
break;
case 4:
__raw_writel(val, addr);
__raw_readl(addr);
break;
}
v3_close_config_window();
raw_spin_unlock_irqrestore(&v3_lock, flags);
return PCIBIOS_SUCCESSFUL;
}
static struct pci_ops pci_v3_ops = {
.read = v3_read_config,
.write = v3_write_config,
};
static int __init pci_v3_setup_resources(struct pci_sys_data *sys)
{
if (request_resource(&iomem_resource, &non_mem)) {
printk(KERN_ERR "PCI: unable to allocate non-prefetchable "
"memory region\n");
return -EBUSY;
}
if (request_resource(&iomem_resource, &pre_mem)) {
release_resource(&non_mem);
printk(KERN_ERR "PCI: unable to allocate prefetchable "
"memory region\n");
return -EBUSY;
}
/*
* the mem resource for this bus
* the prefetch mem resource for this bus
*/
pci_add_resource_offset(&sys->resources, &non_mem, sys->mem_offset);
pci_add_resource_offset(&sys->resources, &pre_mem, sys->mem_offset);
return 1;
}
/*
* These don't seem to be implemented on the Integrator I have, which
* means I can't get additional information on the reason for the pm2fb
* problems. I suppose I'll just have to mind-meld with the machine. ;)
*/
static void __iomem *ap_syscon_base;
#define INTEGRATOR_SC_PCIENABLE_OFFSET 0x18
#define INTEGRATOR_SC_LBFADDR_OFFSET 0x20
#define INTEGRATOR_SC_LBFCODE_OFFSET 0x24
static int
v3_pci_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
{
unsigned long pc = instruction_pointer(regs);
unsigned long instr = *(unsigned long *)pc;
#if 0
char buf[128];
sprintf(buf, "V3 fault: addr 0x%08lx, FSR 0x%03x, PC 0x%08lx [%08lx] LBFADDR=%08x LBFCODE=%02x ISTAT=%02x\n",
addr, fsr, pc, instr, __raw_readl(ap_syscon_base + INTEGRATOR_SC_LBFADDR_OFFSET), __raw_readl(ap_syscon_base + INTEGRATOR_SC_LBFCODE_OFFSET) & 255,
v3_readb(V3_LB_ISTAT));
printk(KERN_DEBUG "%s", buf);
#endif
v3_writeb(V3_LB_ISTAT, 0);
__raw_writel(3, ap_syscon_base + INTEGRATOR_SC_PCIENABLE_OFFSET);
/*
* If the instruction being executed was a read,
* make it look like it read all-ones.
*/
if ((instr & 0x0c100000) == 0x04100000) {
int reg = (instr >> 12) & 15;
unsigned long val;
if (instr & 0x00400000)
val = 255;
else
val = -1;
regs->uregs[reg] = val;
regs->ARM_pc += 4;
return 0;
}
if ((instr & 0x0e100090) == 0x00100090) {
int reg = (instr >> 12) & 15;
regs->uregs[reg] = -1;
regs->ARM_pc += 4;
return 0;
}
return 1;
}
static irqreturn_t v3_irq(int dummy, void *devid)
{
#ifdef CONFIG_DEBUG_LL
struct pt_regs *regs = get_irq_regs();
unsigned long pc = instruction_pointer(regs);
unsigned long instr = *(unsigned long *)pc;
char buf[128];
extern void printascii(const char *);
sprintf(buf, "V3 int %d: pc=0x%08lx [%08lx] LBFADDR=%08x LBFCODE=%02x "
"ISTAT=%02x\n", IRQ_AP_V3INT, pc, instr,
__raw_readl(ap_syscon_base + INTEGRATOR_SC_LBFADDR_OFFSET),
__raw_readl(ap_syscon_base + INTEGRATOR_SC_LBFCODE_OFFSET) & 255,
v3_readb(V3_LB_ISTAT));
printascii(buf);
#endif
v3_writew(V3_PCI_STAT, 0xf000);
v3_writeb(V3_LB_ISTAT, 0);
__raw_writel(3, ap_syscon_base + INTEGRATOR_SC_PCIENABLE_OFFSET);
#ifdef CONFIG_DEBUG_LL
/*
* If the instruction being executed was a read,
* make it look like it read all-ones.
*/
if ((instr & 0x0c100000) == 0x04100000) {
int reg = (instr >> 16) & 15;
sprintf(buf, " reg%d = %08lx\n", reg, regs->uregs[reg]);
printascii(buf);
}
#endif
return IRQ_HANDLED;
}
static int __init pci_v3_setup(int nr, struct pci_sys_data *sys)
{
int ret = 0;
if (!ap_syscon_base)
return -EINVAL;
if (nr == 0) {
sys->mem_offset = non_mem.start;
ret = pci_v3_setup_resources(sys);
}
return ret;
}
/*
* V3_LB_BASE? - local bus address
* V3_LB_MAP? - pci bus address
*/
static void __init pci_v3_preinit(void)
{
unsigned long flags;
unsigned int temp;
pcibios_min_mem = 0x00100000;
/*
* Hook in our fault handler for PCI errors
*/
hook_fault_code(4, v3_pci_fault, SIGBUS, 0, "external abort on linefetch");
hook_fault_code(6, v3_pci_fault, SIGBUS, 0, "external abort on linefetch");
hook_fault_code(8, v3_pci_fault, SIGBUS, 0, "external abort on non-linefetch");
hook_fault_code(10, v3_pci_fault, SIGBUS, 0, "external abort on non-linefetch");
raw_spin_lock_irqsave(&v3_lock, flags);
/*
* Unlock V3 registers, but only if they were previously locked.
*/
if (v3_readw(V3_SYSTEM) & V3_SYSTEM_M_LOCK)
v3_writew(V3_SYSTEM, 0xa05f);
/*
* Setup window 0 - PCI non-prefetchable memory
* Local: 0x40000000 Bus: 0x00000000 Size: 256MB
*/
v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(non_mem.start) |
V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_ENABLE);
v3_writew(V3_LB_MAP0, v3_addr_to_lb_map(non_mem_pci) |
V3_LB_MAP_TYPE_MEM);
/*
* Setup window 1 - PCI prefetchable memory
* Local: 0x50000000 Bus: 0x10000000 Size: 256MB
*/
v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(pre_mem.start) |
V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_PREFETCH |
V3_LB_BASE_ENABLE);
v3_writew(V3_LB_MAP1, v3_addr_to_lb_map(pre_mem_pci) |
V3_LB_MAP_TYPE_MEM_MULTIPLE);
/*
* Setup window 2 - PCI IO
*/
v3_writel(V3_LB_BASE2, v3_addr_to_lb_base2(io_mem.start) |
V3_LB_BASE_ENABLE);
v3_writew(V3_LB_MAP2, v3_addr_to_lb_map2(0));
/*
* Disable PCI to host IO cycles
*/
temp = v3_readw(V3_PCI_CFG) & ~V3_PCI_CFG_M_I2O_EN;
temp |= V3_PCI_CFG_M_IO_REG_DIS | V3_PCI_CFG_M_IO_DIS;
v3_writew(V3_PCI_CFG, temp);
printk(KERN_DEBUG "FIFO_CFG: %04x FIFO_PRIO: %04x\n",
v3_readw(V3_FIFO_CFG), v3_readw(V3_FIFO_PRIORITY));
/*
* Set the V3 FIFO such that writes have higher priority than
* reads, and local bus write causes local bus read fifo flush.
* Same for PCI.
*/
v3_writew(V3_FIFO_PRIORITY, 0x0a0a);
/*
* Re-lock the system register.
*/
temp = v3_readw(V3_SYSTEM) | V3_SYSTEM_M_LOCK;
v3_writew(V3_SYSTEM, temp);
/*
* Clear any error conditions, and enable write errors.
*/
v3_writeb(V3_LB_ISTAT, 0);
v3_writew(V3_LB_CFG, v3_readw(V3_LB_CFG) | (1 << 10));
v3_writeb(V3_LB_IMASK, 0x28);
__raw_writel(3, ap_syscon_base + INTEGRATOR_SC_PCIENABLE_OFFSET);
raw_spin_unlock_irqrestore(&v3_lock, flags);
}
static void __init pci_v3_postinit(void)
{
unsigned int pci_cmd;
pci_cmd = PCI_COMMAND_MEMORY |
PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE;
v3_writew(V3_PCI_CMD, pci_cmd);
v3_writeb(V3_LB_ISTAT, ~0x40);
v3_writeb(V3_LB_IMASK, 0x68);
#if 0
ret = request_irq(IRQ_AP_LBUSTIMEOUT, lb_timeout, 0, "bus timeout", NULL);
if (ret)
printk(KERN_ERR "PCI: unable to grab local bus timeout "
"interrupt: %d\n", ret);
#endif
register_isa_ports(non_mem.start, io_mem.start, 0);
}
/*
* A small note about bridges and interrupts. The DECchip 21050 (and
* later) adheres to the PCI-PCI bridge specification. This says that
* the interrupts on the other side of a bridge are swizzled in the
* following manner:
*
* Dev Interrupt Interrupt
* Pin on Pin on
* Device Connector
*
* 4 A A
* B B
* C C
* D D
*
* 5 A B
* B C
* C D
* D A
*
* 6 A C
* B D
* C A
* D B
*
* 7 A D
* B A
* C B
* D C
*
* Where A = pin 1, B = pin 2 and so on and pin=0 = default = A.
* Thus, each swizzle is ((pin-1) + (device#-4)) % 4
*/
/*
* This routine handles multiple bridges.
*/
static u8 __init pci_v3_swizzle(struct pci_dev *dev, u8 *pinp)
{
if (*pinp == 0)
*pinp = 1;
return pci_common_swizzle(dev, pinp);
}
static int irq_tab[4] __initdata = {
IRQ_AP_PCIINT0, IRQ_AP_PCIINT1, IRQ_AP_PCIINT2, IRQ_AP_PCIINT3
};
/*
* map the specified device/slot/pin to an IRQ. This works out such
* that slot 9 pin 1 is INT0, pin 2 is INT1, and slot 10 pin 1 is INT1.
*/
static int __init pci_v3_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
int intnr = ((slot - 9) + (pin - 1)) & 3;
return irq_tab[intnr];
}
static struct hw_pci pci_v3 __initdata = {
.swizzle = pci_v3_swizzle,
.setup = pci_v3_setup,
.nr_controllers = 1,
.ops = &pci_v3_ops,
.preinit = pci_v3_preinit,
.postinit = pci_v3_postinit,
};
#ifdef CONFIG_OF
static int __init pci_v3_map_irq_dt(const struct pci_dev *dev, u8 slot, u8 pin)
{
struct of_irq oirq;
int ret;
ret = of_irq_parse_pci(dev, &oirq);
if (ret) {
dev_err(&dev->dev, "of_irq_parse_pci() %d\n", ret);
/* Proper return code 0 == NO_IRQ */
return 0;
}
return irq_create_of_mapping(oirq.controller, oirq.specifier,
oirq.size);
}
static int __init pci_v3_dtprobe(struct platform_device *pdev,
struct device_node *np)
{
struct of_pci_range_parser parser;
struct of_pci_range range;
struct resource *res;
int irq, ret;
if (of_pci_range_parser_init(&parser, np))
return -EINVAL;
/* Get base for bridge registers */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "unable to obtain PCIv3 base\n");
return -ENODEV;
}
pci_v3_base = devm_ioremap(&pdev->dev, res->start,
resource_size(res));
if (!pci_v3_base) {
dev_err(&pdev->dev, "unable to remap PCIv3 base\n");
return -ENODEV;
}
/* Get and request error IRQ resource */
irq = platform_get_irq(pdev, 0);
if (irq <= 0) {
dev_err(&pdev->dev, "unable to obtain PCIv3 error IRQ\n");
return -ENODEV;
}
ret = devm_request_irq(&pdev->dev, irq, v3_irq, 0,
"PCIv3 error", NULL);
if (ret < 0) {
dev_err(&pdev->dev, "unable to request PCIv3 error IRQ %d (%d)\n", irq, ret);
return ret;
}
for_each_of_pci_range(&parser, &range) {
if (!range.flags) {
of_pci_range_to_resource(&range, np, &conf_mem);
conf_mem.name = "PCIv3 config";
}
if (range.flags & IORESOURCE_IO) {
of_pci_range_to_resource(&range, np, &io_mem);
io_mem.name = "PCIv3 I/O";
}
if ((range.flags & IORESOURCE_MEM) &&
!(range.flags & IORESOURCE_PREFETCH)) {
non_mem_pci = range.pci_addr;
non_mem_pci_sz = range.size;
of_pci_range_to_resource(&range, np, &non_mem);
non_mem.name = "PCIv3 non-prefetched mem";
}
if ((range.flags & IORESOURCE_MEM) &&
(range.flags & IORESOURCE_PREFETCH)) {
pre_mem_pci = range.pci_addr;
pre_mem_pci_sz = range.size;
of_pci_range_to_resource(&range, np, &pre_mem);
pre_mem.name = "PCIv3 prefetched mem";
}
}
if (!conf_mem.start || !io_mem.start ||
!non_mem.start || !pre_mem.start) {
dev_err(&pdev->dev, "missing ranges in device node\n");
return -EINVAL;
}
pci_v3.map_irq = pci_v3_map_irq_dt;
pci_common_init_dev(&pdev->dev, &pci_v3);
return 0;
}
#else
static inline int pci_v3_dtprobe(struct platform_device *pdev,
struct device_node *np)
{
return -EINVAL;
}
#endif
static int __init pci_v3_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
int ret;
/* Remap the Integrator system controller */
ap_syscon_base = ioremap(INTEGRATOR_SC_BASE, 0x100);
if (!ap_syscon_base) {
dev_err(&pdev->dev, "unable to remap the AP syscon for PCIv3\n");
return -ENODEV;
}
/* Device tree probe path */
if (np)
return pci_v3_dtprobe(pdev, np);
pci_v3_base = devm_ioremap(&pdev->dev, PHYS_PCI_V3_BASE, SZ_64K);
if (!pci_v3_base) {
dev_err(&pdev->dev, "unable to remap PCIv3 base\n");
return -ENODEV;
}
ret = devm_request_irq(&pdev->dev, IRQ_AP_V3INT, v3_irq, 0, "V3", NULL);
if (ret) {
dev_err(&pdev->dev, "unable to grab PCI error interrupt: %d\n",
ret);
return -ENODEV;
}
conf_mem.name = "PCIv3 config";
conf_mem.start = PHYS_PCI_CONFIG_BASE;
conf_mem.end = PHYS_PCI_CONFIG_BASE + SZ_16M - 1;
conf_mem.flags = IORESOURCE_MEM;
io_mem.name = "PCIv3 I/O";
io_mem.start = PHYS_PCI_IO_BASE;
io_mem.end = PHYS_PCI_IO_BASE + SZ_16M - 1;
io_mem.flags = IORESOURCE_MEM;
non_mem_pci = 0x00000000;
non_mem_pci_sz = SZ_256M;
non_mem.name = "PCIv3 non-prefetched mem";
non_mem.start = PHYS_PCI_MEM_BASE;
non_mem.end = PHYS_PCI_MEM_BASE + SZ_256M - 1;
non_mem.flags = IORESOURCE_MEM;
pre_mem_pci = 0x10000000;
pre_mem_pci_sz = SZ_256M;
pre_mem.name = "PCIv3 prefetched mem";
pre_mem.start = PHYS_PCI_PRE_BASE + SZ_256M;
pre_mem.end = PHYS_PCI_PRE_BASE + SZ_256M - 1;
pre_mem.flags = IORESOURCE_MEM | IORESOURCE_PREFETCH;
pci_v3.map_irq = pci_v3_map_irq;
pci_common_init_dev(&pdev->dev, &pci_v3);
return 0;
}
static const struct of_device_id pci_ids[] = {
{ .compatible = "v3,v360epc-pci", },
{},
};
static struct platform_driver pci_v3_driver = {
.driver = {
.name = "pci-v3",
.of_match_table = pci_ids,
},
};
static int __init pci_v3_init(void)
{
return platform_driver_probe(&pci_v3_driver, pci_v3_probe);
}
subsys_initcall(pci_v3_init);
/*
* Static mappings for the PCIv3 bridge
*
* e8000000 40000000 PCI memory PHYS_PCI_MEM_BASE (max 512M)
* ec000000 61000000 PCI config space PHYS_PCI_CONFIG_BASE (max 16M)
* fee00000 60000000 PCI IO PHYS_PCI_IO_BASE (max 16M)
*/
static struct map_desc pci_v3_io_desc[] __initdata __maybe_unused = {
{
.virtual = (unsigned long)PCI_MEMORY_VADDR,
.pfn = __phys_to_pfn(PHYS_PCI_MEM_BASE),
.length = SZ_16M,
.type = MT_DEVICE
}, {
.virtual = (unsigned long)PCI_CONFIG_VADDR,
.pfn = __phys_to_pfn(PHYS_PCI_CONFIG_BASE),
.length = SZ_16M,
.type = MT_DEVICE
}
};
int __init pci_v3_early_init(void)
{
iotable_init(pci_v3_io_desc, ARRAY_SIZE(pci_v3_io_desc));
vga_base = (unsigned long)PCI_MEMORY_VADDR;
pci_map_io_early(__phys_to_pfn(PHYS_PCI_IO_BASE));
return 0;
}
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