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linux/arch/mips/txx9/generic/pci.c

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/*
* linux/arch/mips/txx9/pci.c
*
* Based on linux/arch/mips/txx9/rbtx4927/setup.c,
* linux/arch/mips/txx9/rbtx4938/setup.c,
* and RBTX49xx patch from CELF patch archive.
*
* Copyright 2001-2005 MontaVista Software Inc.
* Copyright (C) 1996, 97, 2001, 04 Ralf Baechle (ralf@linux-mips.org)
* (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/delay.h>
#include <linux/jiffies.h>
#include <linux/io.h>
#include <asm/txx9/generic.h>
#include <asm/txx9/pci.h>
#ifdef CONFIG_TOSHIBA_FPCIB0
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <asm/i8259.h>
#include <asm/txx9/smsc_fdc37m81x.h>
#endif
static int __init
early_read_config_word(struct pci_controller *hose,
int top_bus, int bus, int devfn, int offset, u16 *value)
{
struct pci_bus fake_bus;
fake_bus.number = bus;
fake_bus.sysdata = hose;
fake_bus.ops = hose->pci_ops;
if (bus != top_bus)
/* Fake a parent bus structure. */
fake_bus.parent = &fake_bus;
else
fake_bus.parent = NULL;
return pci_bus_read_config_word(&fake_bus, devfn, offset, value);
}
int __init txx9_pci66_check(struct pci_controller *hose, int top_bus,
int current_bus)
{
u32 pci_devfn;
unsigned short vid;
int cap66 = -1;
u16 stat;
/* It seems SLC90E66 needs some time after PCI reset... */
mdelay(80);
pr_info("PCI: Checking 66MHz capabilities...\n");
for (pci_devfn = 0; pci_devfn < 0xff; pci_devfn++) {
if (PCI_FUNC(pci_devfn))
continue;
if (early_read_config_word(hose, top_bus, current_bus,
pci_devfn, PCI_VENDOR_ID, &vid) !=
PCIBIOS_SUCCESSFUL)
continue;
if (vid == 0xffff)
continue;
/* check 66MHz capability */
if (cap66 < 0)
cap66 = 1;
if (cap66) {
early_read_config_word(hose, top_bus, current_bus,
pci_devfn, PCI_STATUS, &stat);
if (!(stat & PCI_STATUS_66MHZ)) {
pr_debug("PCI: %02x:%02x not 66MHz capable.\n",
current_bus, pci_devfn);
cap66 = 0;
break;
}
}
}
return cap66 > 0;
}
static struct resource primary_pci_mem_res[2] = {
{ .name = "PCI MEM" },
{ .name = "PCI MMIO" },
};
static struct resource primary_pci_io_res = { .name = "PCI IO" };
struct pci_controller txx9_primary_pcic = {
.mem_resource = &primary_pci_mem_res[0],
.io_resource = &primary_pci_io_res,
};
#ifdef CONFIG_64BIT
int txx9_pci_mem_high __initdata = 1;
#else
int txx9_pci_mem_high __initdata;
#endif
/*
* allocate pci_controller and resources.
* mem_base, io_base: physical address. 0 for auto assignment.
* mem_size and io_size means max size on auto assignment.
* pcic must be &txx9_primary_pcic or NULL.
*/
struct pci_controller *__init
txx9_alloc_pci_controller(struct pci_controller *pcic,
unsigned long mem_base, unsigned long mem_size,
unsigned long io_base, unsigned long io_size)
{
struct pcic {
struct pci_controller c;
struct resource r_mem[2];
struct resource r_io;
} *new = NULL;
int min_size = 0x10000;
if (!pcic) {
new = kzalloc(sizeof(*new), GFP_KERNEL);
if (!new)
return NULL;
new->r_mem[0].name = "PCI mem";
new->r_mem[1].name = "PCI mmio";
new->r_io.name = "PCI io";
new->c.mem_resource = new->r_mem;
new->c.io_resource = &new->r_io;
pcic = &new->c;
} else
BUG_ON(pcic != &txx9_primary_pcic);
pcic->io_resource->flags = IORESOURCE_IO;
/*
* for auto assignment, first search a (big) region for PCI
* MEM, then search a region for PCI IO.
*/
if (mem_base) {
pcic->mem_resource[0].start = mem_base;
pcic->mem_resource[0].end = mem_base + mem_size - 1;
if (request_resource(&iomem_resource, &pcic->mem_resource[0]))
goto free_and_exit;
} else {
unsigned long min = 0, max = 0x20000000; /* low 512MB */
if (!mem_size) {
/* default size for auto assignment */
if (txx9_pci_mem_high)
mem_size = 0x20000000; /* mem:512M(max) */
else
mem_size = 0x08000000; /* mem:128M(max) */
}
if (txx9_pci_mem_high) {
min = 0x20000000;
max = 0xe0000000;
}
/* search free region for PCI MEM */
for (; mem_size >= min_size; mem_size /= 2) {
if (allocate_resource(&iomem_resource,
&pcic->mem_resource[0],
mem_size, min, max,
mem_size, NULL, NULL) == 0)
break;
}
if (mem_size < min_size)
goto free_and_exit;
}
pcic->mem_resource[1].flags = IORESOURCE_MEM | IORESOURCE_BUSY;
if (io_base) {
pcic->mem_resource[1].start = io_base;
pcic->mem_resource[1].end = io_base + io_size - 1;
if (request_resource(&iomem_resource, &pcic->mem_resource[1]))
goto release_and_exit;
} else {
if (!io_size)
/* default size for auto assignment */
io_size = 0x01000000; /* io:16M(max) */
/* search free region for PCI IO in low 512MB */
for (; io_size >= min_size; io_size /= 2) {
if (allocate_resource(&iomem_resource,
&pcic->mem_resource[1],
io_size, 0, 0x20000000,
io_size, NULL, NULL) == 0)
break;
}
if (io_size < min_size)
goto release_and_exit;
io_base = pcic->mem_resource[1].start;
}
pcic->mem_resource[0].flags = IORESOURCE_MEM;
if (pcic == &txx9_primary_pcic &&
mips_io_port_base == (unsigned long)-1) {
/* map ioport 0 to PCI I/O space address 0 */
set_io_port_base(IO_BASE + pcic->mem_resource[1].start);
pcic->io_resource->start = 0;
pcic->io_offset = 0; /* busaddr == ioaddr */
pcic->io_map_base = IO_BASE + pcic->mem_resource[1].start;
} else {
/* physaddr to ioaddr */
pcic->io_resource->start =
io_base - (mips_io_port_base - IO_BASE);
pcic->io_offset = io_base - (mips_io_port_base - IO_BASE);
pcic->io_map_base = mips_io_port_base;
}
pcic->io_resource->end = pcic->io_resource->start + io_size - 1;
pcic->mem_offset = 0; /* busaddr == physaddr */
pr_info("PCI: IO %pR MEM %pR\n", &pcic->mem_resource[1],
&pcic->mem_resource[0]);
/* register_pci_controller() will request MEM resource */
release_resource(&pcic->mem_resource[0]);
return pcic;
release_and_exit:
release_resource(&pcic->mem_resource[0]);
free_and_exit:
kfree(new);
pr_err("PCI: Failed to allocate resources.\n");
return NULL;
}
static int __init
txx9_arch_pci_init(void)
{
PCIBIOS_MIN_IO = 0x8000; /* reseve legacy I/O space */
return 0;
}
arch_initcall(txx9_arch_pci_init);
/* IRQ/IDSEL mapping */
int txx9_pci_option =
#ifdef CONFIG_PICMG_PCI_BACKPLANE_DEFAULT
TXX9_PCI_OPT_PICMG |
#endif
TXX9_PCI_OPT_CLK_AUTO;
enum txx9_pci_err_action txx9_pci_err_action = TXX9_PCI_ERR_REPORT;
#ifdef CONFIG_TOSHIBA_FPCIB0
static irqreturn_t i8259_interrupt(int irq, void *dev_id)
{
int isairq;
isairq = i8259_irq();
if (unlikely(isairq <= I8259A_IRQ_BASE))
return IRQ_NONE;
generic_handle_irq(isairq);
return IRQ_HANDLED;
}
static int txx9_i8259_irq_setup(int irq)
{
int err;
init_i8259_irqs();
err = request_irq(irq, &i8259_interrupt, IRQF_SHARED,
"cascade(i8259)", (void *)(long)irq);
if (!err)
pr_info("PCI-ISA bridge PIC (irq %d)\n", irq);
return err;
}
static void __ref quirk_slc90e66_bridge(struct pci_dev *dev)
{
int irq; /* PCI/ISA Bridge interrupt */
u8 reg_64;
u32 reg_b0;
u8 reg_e1;
irq = pcibios_map_irq(dev, PCI_SLOT(dev->devfn), 1); /* INTA */
if (!irq)
return;
txx9_i8259_irq_setup(irq);
pci_read_config_byte(dev, 0x64, &reg_64);
pci_read_config_dword(dev, 0xb0, &reg_b0);
pci_read_config_byte(dev, 0xe1, &reg_e1);
/* serial irq control */
reg_64 = 0xd0;
/* serial irq pin */
reg_b0 |= 0x00010000;
/* ide irq on isa14 */
reg_e1 &= 0xf0;
reg_e1 |= 0x0d;
pci_write_config_byte(dev, 0x64, reg_64);
pci_write_config_dword(dev, 0xb0, reg_b0);
pci_write_config_byte(dev, 0xe1, reg_e1);
smsc_fdc37m81x_init(0x3f0);
smsc_fdc37m81x_config_beg();
smsc_fdc37m81x_config_set(SMSC_FDC37M81X_DNUM,
SMSC_FDC37M81X_KBD);
smsc_fdc37m81x_config_set(SMSC_FDC37M81X_INT, 1);
smsc_fdc37m81x_config_set(SMSC_FDC37M81X_INT2, 12);
smsc_fdc37m81x_config_set(SMSC_FDC37M81X_ACTIVE,
1);
smsc_fdc37m81x_config_end();
}
static void quirk_slc90e66_ide(struct pci_dev *dev)
{
unsigned char dat;
int regs[2] = {0x41, 0x43};
int i;
/* SMSC SLC90E66 IDE uses irq 14, 15 (default) */
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 14);
pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &dat);
pr_info("PCI: %s: IRQ %02x", pci_name(dev), dat);
/* enable SMSC SLC90E66 IDE */
for (i = 0; i < ARRAY_SIZE(regs); i++) {
pci_read_config_byte(dev, regs[i], &dat);
pci_write_config_byte(dev, regs[i], dat | 0x80);
pci_read_config_byte(dev, regs[i], &dat);
pr_cont(" IDETIM%d %02x", i, dat);
}
pci_read_config_byte(dev, 0x5c, &dat);
/*
* !!! DO NOT REMOVE THIS COMMENT IT IS REQUIRED BY SMSC !!!
*
* This line of code is intended to provide the user with a work
* around solution to the anomalies cited in SMSC's anomaly sheet
* entitled, "SLC90E66 Functional Rev.J_0.1 Anomalies"".
*
* !!! DO NOT REMOVE THIS COMMENT IT IS REQUIRED BY SMSC !!!
*/
dat |= 0x01;
pci_write_config_byte(dev, 0x5c, dat);
pci_read_config_byte(dev, 0x5c, &dat);
pr_cont(" REG5C %02x\n", dat);
}
#endif /* CONFIG_TOSHIBA_FPCIB0 */
static void tc35815_fixup(struct pci_dev *dev)
{
/* This device may have PM registers but not they are not supported. */
if (dev->pm_cap) {
dev_info(&dev->dev, "PM disabled\n");
dev->pm_cap = 0;
}
}
static void final_fixup(struct pci_dev *dev)
{
unsigned char bist;
/* Do build-in self test */
if (pci_read_config_byte(dev, PCI_BIST, &bist) == PCIBIOS_SUCCESSFUL &&
(bist & PCI_BIST_CAPABLE)) {
unsigned long timeout;
pci_set_power_state(dev, PCI_D0);
pr_info("PCI: %s BIST...", pci_name(dev));
pci_write_config_byte(dev, PCI_BIST, PCI_BIST_START);
timeout = jiffies + HZ * 2; /* timeout after 2 sec */
do {
pci_read_config_byte(dev, PCI_BIST, &bist);
if (time_after(jiffies, timeout))
break;
} while (bist & PCI_BIST_START);
if (bist & (PCI_BIST_CODE_MASK | PCI_BIST_START))
pr_cont("failed. (0x%x)\n", bist);
else
pr_cont("OK.\n");
}
}
#ifdef CONFIG_TOSHIBA_FPCIB0
#define PCI_DEVICE_ID_EFAR_SLC90E66_0 0x9460
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_0,
quirk_slc90e66_bridge);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1,
quirk_slc90e66_ide);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1,
quirk_slc90e66_ide);
#endif
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_TOSHIBA_2,
PCI_DEVICE_ID_TOSHIBA_TC35815_NWU, tc35815_fixup);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_TOSHIBA_2,
PCI_DEVICE_ID_TOSHIBA_TC35815_TX4939, tc35815_fixup);
DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, final_fixup);
DECLARE_PCI_FIXUP_RESUME(PCI_ANY_ID, PCI_ANY_ID, final_fixup);
int pcibios_plat_dev_init(struct pci_dev *dev)
{
return 0;
}
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
return txx9_board_vec->pci_map_irq(dev, slot, pin);
}
char * (*txx9_board_pcibios_setup)(char *str) __initdata;
char *__init txx9_pcibios_setup(char *str)
{
if (txx9_board_pcibios_setup && !txx9_board_pcibios_setup(str))
return NULL;
if (!strcmp(str, "picmg")) {
/* PICMG compliant backplane (TOSHIBA JMB-PICMG-ATX
(5V or 3.3V), JMB-PICMG-L2 (5V only), etc.) */
txx9_pci_option |= TXX9_PCI_OPT_PICMG;
return NULL;
} else if (!strcmp(str, "nopicmg")) {
/* non-PICMG compliant backplane (TOSHIBA
RBHBK4100,RBHBK4200, Interface PCM-PCM05, etc.) */
txx9_pci_option &= ~TXX9_PCI_OPT_PICMG;
return NULL;
} else if (!strncmp(str, "clk=", 4)) {
char *val = str + 4;
txx9_pci_option &= ~TXX9_PCI_OPT_CLK_MASK;
if (strcmp(val, "33") == 0)
txx9_pci_option |= TXX9_PCI_OPT_CLK_33;
else if (strcmp(val, "66") == 0)
txx9_pci_option |= TXX9_PCI_OPT_CLK_66;
else /* "auto" */
txx9_pci_option |= TXX9_PCI_OPT_CLK_AUTO;
return NULL;
} else if (!strncmp(str, "err=", 4)) {
if (!strcmp(str + 4, "panic"))
txx9_pci_err_action = TXX9_PCI_ERR_PANIC;
else if (!strcmp(str + 4, "ignore"))
txx9_pci_err_action = TXX9_PCI_ERR_IGNORE;
return NULL;
}
return str;
}
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