/*
* 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;
int ret;
/* It seems SLC90E66 needs some time after PCI reset... */
mdelay(80 );
pr_info("PCI: Checking 66MHz capabilities...\n" );
for (pci_devfn = 0 ; pci_devfn < 0 xff; pci_devfn++) {
if (PCI_FUNC(pci_devfn))
continue ;
ret = early_read_config_word(hose, top_bus, current_bus,
pci_devfn, PCI_VENDOR_ID, &vid);
if (ret != PCIBIOS_SUCCESSFUL)
continue ;
if (vid == 0 xffff)
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 = 0 x10000;
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 = 0 x20000000; /* low 512MB */
if (!mem_size) {
/* default size for auto assignment */
if (txx9_pci_mem_high)
mem_size = 0 x20000000; /* mem:512M(max) */
else
mem_size = 0 x08000000; /* mem:128M(max) */
}
if (txx9_pci_mem_high) {
min = 0 x20000000;
max = 0 xe0000000;
}
/* 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 = 0 x01000000; /* 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 , 0 x20000000,
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 = 0 x8000; /* reserve 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, 0 x64, ®_64);
pci_read_config_dword(dev, 0 xb0, ®_b0);
pci_read_config_byte(dev, 0 xe1, ®_e1);
/* serial irq control */
reg_64 = 0 xd0;
/* serial irq pin */
reg_b0 |= 0 x00010000;
/* ide irq on isa14 */
reg_e1 &= 0 xf0;
reg_e1 |= 0 x0d;
pci_write_config_byte(dev, 0 x64, reg_64);
pci_write_config_dword(dev, 0 xb0, reg_b0);
pci_write_config_byte(dev, 0 xe1, reg_e1);
smsc_fdc37m81x_init(0 x3f0);
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 ] = {0 x41, 0 x43};
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 | 0 x80);
pci_read_config_byte(dev, regs[i], &dat);
pr_cont(" IDETIM%d %02x" , i, dat);
}
pci_read_config_byte(dev, 0 x5c, &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 |= 0 x01;
pci_write_config_byte(dev, 0 x5c, dat);
pci_read_config_byte(dev, 0 x5c, &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 long timeout;
unsigned char bist;
int ret;
/* Do built-in self test */
ret = pci_read_config_byte(dev, PCI_BIST, &bist);
if ((ret != PCIBIOS_SUCCESSFUL) || !(bist & PCI_BIST_CAPABLE))
return ;
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 0 x9460
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 ;
}
static int (*txx9_pci_map_irq)(const struct pci_dev *dev, u8 slot, u8 pin);
int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
return txx9_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;
}
txx9_pci_map_irq = txx9_board_vec->pci_map_irq;
return str;
}
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