/*
*
* (C) Copyright 2002
* Daniel Engström, Omicron Ceti AB <daniel@omicron.se>.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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 <common.h>
#include <pci.h>
#include <ds1722.h>
#include <asm/io.h>
#include <asm/pci.h>
#include <asm/ic/sc520.h>
#include <asm/ic/pci.h>
DECLARE_GLOBAL_DATA_PTR;
static void pci_sc520_spunk_fixup_irq(struct pci_controller *hose, pci_dev_t dev)
{
int version = sc520_mmcr->sysinfo;
/* a configurable lists of irqs to steal
* when we need one (a board with more pci interrupt pins
* would use a larger table */
static int irq_list[] = {
CONFIG_SYS_FIRST_PCI_IRQ,
CONFIG_SYS_SECOND_PCI_IRQ,
CONFIG_SYS_THIRD_PCI_IRQ,
CONFIG_SYS_FORTH_PCI_IRQ
};
static int next_irq_index=0;
uchar tmp_pin;
int pin;
pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_PIN, &tmp_pin);
pin = tmp_pin;
pin-=1; /* pci config space use 1-based numbering */
if (-1 == pin) {
return; /* device use no irq */
}
/* map device number + pin to a pin on the sc520 */
switch (PCI_DEV(dev)) {
case 6: /* ETH0 */
pin+=SC520_PCI_INTA;
break;
case 7: /* ETH1 */
pin+=SC520_PCI_INTB;
break;
case 8: /* Crypto */
pin+=SC520_PCI_INTC;
break;
case 9: /* PMC slot */
pin+=SC520_PCI_INTD;
break;
case 10: /* PC-Card */
if (version < 10) {
pin+=SC520_PCI_INTD;
} else {
pin+=SC520_PCI_INTC;
}
break;
default:
return;
}
pin&=3; /* wrap around */
if (sc520_pci_ints[pin] == -1) {
/* re-route one interrupt for us */
if (next_irq_index > 3) {
return;
}
if (pci_sc520_set_irq(pin, irq_list[next_irq_index])) {
return;
}
next_irq_index++;
}
if (-1 != sc520_pci_ints[pin]) {
pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE,
sc520_pci_ints[pin]);
}
#if 0
printf("fixup_irq: device %d pin %c irq %d\n",
PCI_DEV(dev), 'A' + pin, sc520_pci_ints[pin]);
#endif
}
static void pci_sc520_spunk_configure_cardbus(struct pci_controller *hose,
pci_dev_t dev, struct pci_config_table *te)
{
u32 io_base;
u32 temp;
pciauto_config_device(hose, dev);
pci_hose_write_config_word(hose, dev, PCI_COMMAND, 0x07); /* enable device */
pci_hose_write_config_byte(hose, dev, 0x0c, 0x10); /* cacheline size */
pci_hose_write_config_byte(hose, dev, 0x0d, 0x40); /* latency timer */
pci_hose_write_config_byte(hose, dev, 0x1b, 0x40); /* cardbus latency timer */
pci_hose_write_config_word(hose, dev, PCI_BRIDGE_CONTROL, 0x0040); /* reset cardbus */
pci_hose_write_config_word(hose, dev, PCI_BRIDGE_CONTROL, 0x0080); /* route interrupts though ExCA */
pci_hose_write_config_word(hose, dev, 0x44, 0x3e0); /* map legacy I/O port to 0x3e0 */
pci_hose_read_config_dword(hose, dev, 0x80, &temp); /* System control */
pci_hose_write_config_dword(hose, dev, 0x80, temp | 0x60); /* System control: disable clockrun */
/* route MF0 to ~INT and MF3 to IRQ7
* reserve all others */
pci_hose_write_config_dword(hose, dev, 0x8c, 0x00007002);
pci_hose_write_config_byte(hose, dev, 0x91, 0x00); /* card control */
pci_hose_write_config_byte(hose, dev, 0x92, 0x62); /* device control */
if (te->device != 0xac56) {
pci_hose_write_config_byte(hose, dev, 0x93, 0x21); /* async interrupt enable */
pci_hose_write_config_word(hose, dev, 0xa8, 0x0000); /* reset GPIO */
pci_hose_write_config_word(hose, dev, 0xac, 0x0000); /* reset GPIO */
pci_hose_write_config_word(hose, dev, 0xaa, 0x0000); /* reset GPIO */
pci_hose_write_config_word(hose, dev, 0xae, 0x0000); /* reset GPIO */
} else {
pci_hose_write_config_byte(hose, dev, 0x93, 0x20); /* */
}
pci_hose_write_config_word(hose, dev, 0xa4, 0x8000); /* reset power management */
pci_hose_read_config_dword(hose, dev, PCI_BASE_ADDRESS_0, &io_base);
io_base &= ~0xfL;
writeb(0x07, io_base+0x803); /* route CSC irq though ExCA and enable IRQ7 */
writel(0, io_base+0x10); /* CLKRUN default */
writel(0, io_base+0x20); /* CLKRUN default */
}
static struct pci_config_table pci_sc520_spunk_config_table[] = {
{ 0x104c, 0xac50, PCI_ANY_ID, 0, 0x0a, 0, pci_sc520_spunk_configure_cardbus, { 0, 0, 0} },
{ 0x104c, 0xac56, PCI_ANY_ID, 0, 0x0a, 0, pci_sc520_spunk_configure_cardbus, { 0, 0, 0} },
{ 0, 0, 0, 0, 0, 0, NULL, {0,0,0}}
};
static struct pci_controller sc520_spunk_hose = {
fixup_irq: pci_sc520_spunk_fixup_irq,
config_table: pci_sc520_spunk_config_table,
first_busno: 0x00,
last_busno: 0xff,
};
void pci_init_board(void)
{
pci_sc520_init(&sc520_spunk_hose);
}
/*
* This function should map a chunk of size bytes
* of the system address space to the ISA bus
*
* The function will return the memory address
* as seen by the host (which may very will be the
* same as the bus address)
*/
u32 isa_map_rom(u32 bus_addr, int size)
{
u32 par;
printf("isa_map_rom asked to map %d bytes at %x\n",
size, bus_addr);
par = size;
if (par < 0x80000) {
par = 0x80000;
}
par >>= 12;
par--;
par&=0x7f;
par <<= 18;
par |= (bus_addr>>12);
par |= 0x50000000;
printf ("setting PAR11 to %x\n", par);
/* Map rom 0x10000 with PAR1 */
sc520_mmcr->par[11] = par;
return bus_addr;
}
/*
* this function removed any mapping created
* with pci_get_rom_window()
*/
void isa_unmap_rom(u32 addr)
{
printf("isa_unmap_rom asked to unmap %x", addr);
if ((addr>>12) == (sc520_mmcr->par[11] & 0x3ffff)) {
sc520_mmcr->par[11] = 0;
printf(" done\n");
return;
}
printf(" not ours\n");
}
#define PCI_ROM_TEMP_SPACE 0x10000
/*
* This function should map a chunk of size bytes
* of the system address space to the PCI bus,
* suitable to map PCI ROMS (bus address < 16M)
* the function will return the host memory address
* which should be converted into a bus address
* before used to configure the PCI rom address
* decoder
*/
u32 pci_get_rom_window(struct pci_controller *hose, int size)
{
u32 par;
par = size;
if (par < 0x80000) {
par = 0x80000;
}
par >>= 16;
par--;
par&=0x7ff;
par <<= 14;
par |= (PCI_ROM_TEMP_SPACE>>16);
par |= 0x72000000;
printf ("setting PAR1 to %x\n", par);
/* Map rom 0x10000 with PAR1 */
sc520_mmcr->par[1] = par;
return PCI_ROM_TEMP_SPACE;
}
/*
* this function removed any mapping created
* with pci_get_rom_window()
*/
void pci_remove_rom_window(struct pci_controller *hose, u32 addr)
{
printf("pci_remove_rom_window: %x", addr);
if (addr == PCI_ROM_TEMP_SPACE) {
sc520_mmcr->par[1] = 0;
printf(" done\n");
return;
}
printf(" not ours\n");
}
/*
* This function is called in order to provide acces to the
* legacy video I/O ports on the PCI bus.
* After this function accesses to I/O ports 0x3b0-0x3bb and
* 0x3c0-0x3df shuld result in transactions on the PCI bus.
*
*/
int pci_enable_legacy_video_ports(struct pci_controller *hose)
{
/* Map video memory to 0xa0000*/
sc520_mmcr->par[0] = 0x7200400a;
/* forward all I/O accesses to PCI */
sc520_mmcr->adddecctl = sc520_mmcr->adddecctl | IO_HOLE_DEST_PCI;
/* so we map away all io ports to pci (only way to access pci io
* below 0x400. But then we have to map back the portions that we dont
* use so that the generate cycles on the GPIO bus where the sio and
* ISA slots are connected, this requre the use of several PAR registers
*/
/* bring 0x100 - 0x2f7 back to ISA using PAR5 */
sc520_mmcr->par[5] = 0x31f70100;
/* com2 use 2f8-2ff */
/* bring 0x300 - 0x3af back to ISA using PAR7 */
sc520_mmcr->par[7] = 0x30af0300;
/* vga use 3b0-3bb */
/* bring 0x3bc - 0x3bf back to ISA using PAR8 */
sc520_mmcr->par[8] = 0x300303bc;
/* vga use 3c0-3df */
/* bring 0x3e0 - 0x3f7 back to ISA using PAR9 */
sc520_mmcr->par[9] = 0x301703e0;
/* com1 use 3f8-3ff */
return 0;
}