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https://github.com/AsahiLinux/u-boot
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323 lines
8.3 KiB
C
323 lines
8.3 KiB
C
/*
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*
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* (C) Copyright 2002
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* Daniel Engström, Omicron Ceti AB <daniel@omicron.se>.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <pci.h>
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#include <ds1722.h>
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#include <asm/io.h>
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#include <asm/pci.h>
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#include <asm/ic/sc520.h>
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#include <asm/ic/pci.h>
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DECLARE_GLOBAL_DATA_PTR;
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static void pci_sc520_spunk_fixup_irq(struct pci_controller *hose, pci_dev_t dev)
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{
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int version = sc520_mmcr->sysinfo;
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/* a configurable lists of irqs to steal
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* when we need one (a board with more pci interrupt pins
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* would use a larger table */
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static int irq_list[] = {
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CONFIG_SYS_FIRST_PCI_IRQ,
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CONFIG_SYS_SECOND_PCI_IRQ,
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CONFIG_SYS_THIRD_PCI_IRQ,
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CONFIG_SYS_FORTH_PCI_IRQ
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};
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static int next_irq_index=0;
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uchar tmp_pin;
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int pin;
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pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_PIN, &tmp_pin);
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pin = tmp_pin;
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pin-=1; /* pci config space use 1-based numbering */
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if (-1 == pin) {
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return; /* device use no irq */
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}
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/* map device number + pin to a pin on the sc520 */
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switch (PCI_DEV(dev)) {
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case 6: /* ETH0 */
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pin+=SC520_PCI_INTA;
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break;
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case 7: /* ETH1 */
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pin+=SC520_PCI_INTB;
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break;
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case 8: /* Crypto */
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pin+=SC520_PCI_INTC;
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break;
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case 9: /* PMC slot */
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pin+=SC520_PCI_INTD;
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break;
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case 10: /* PC-Card */
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if (version < 10) {
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pin+=SC520_PCI_INTD;
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} else {
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pin+=SC520_PCI_INTC;
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}
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break;
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default:
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return;
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}
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pin&=3; /* wrap around */
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if (sc520_pci_ints[pin] == -1) {
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/* re-route one interrupt for us */
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if (next_irq_index > 3) {
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return;
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}
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if (pci_sc520_set_irq(pin, irq_list[next_irq_index])) {
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return;
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}
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next_irq_index++;
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}
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if (-1 != sc520_pci_ints[pin]) {
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pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE,
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sc520_pci_ints[pin]);
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}
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#if 0
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printf("fixup_irq: device %d pin %c irq %d\n",
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PCI_DEV(dev), 'A' + pin, sc520_pci_ints[pin]);
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#endif
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}
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static void pci_sc520_spunk_configure_cardbus(struct pci_controller *hose,
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pci_dev_t dev, struct pci_config_table *te)
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{
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u32 io_base;
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u32 temp;
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pciauto_config_device(hose, dev);
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pci_hose_write_config_word(hose, dev, PCI_COMMAND, 0x07); /* enable device */
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pci_hose_write_config_byte(hose, dev, 0x0c, 0x10); /* cacheline size */
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pci_hose_write_config_byte(hose, dev, 0x0d, 0x40); /* latency timer */
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pci_hose_write_config_byte(hose, dev, 0x1b, 0x40); /* cardbus latency timer */
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pci_hose_write_config_word(hose, dev, PCI_BRIDGE_CONTROL, 0x0040); /* reset cardbus */
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pci_hose_write_config_word(hose, dev, PCI_BRIDGE_CONTROL, 0x0080); /* route interrupts though ExCA */
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pci_hose_write_config_word(hose, dev, 0x44, 0x3e0); /* map legacy I/O port to 0x3e0 */
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pci_hose_read_config_dword(hose, dev, 0x80, &temp); /* System control */
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pci_hose_write_config_dword(hose, dev, 0x80, temp | 0x60); /* System control: disable clockrun */
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/* route MF0 to ~INT and MF3 to IRQ7
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* reserve all others */
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pci_hose_write_config_dword(hose, dev, 0x8c, 0x00007002);
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pci_hose_write_config_byte(hose, dev, 0x91, 0x00); /* card control */
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pci_hose_write_config_byte(hose, dev, 0x92, 0x62); /* device control */
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if (te->device != 0xac56) {
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pci_hose_write_config_byte(hose, dev, 0x93, 0x21); /* async interrupt enable */
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pci_hose_write_config_word(hose, dev, 0xa8, 0x0000); /* reset GPIO */
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pci_hose_write_config_word(hose, dev, 0xac, 0x0000); /* reset GPIO */
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pci_hose_write_config_word(hose, dev, 0xaa, 0x0000); /* reset GPIO */
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pci_hose_write_config_word(hose, dev, 0xae, 0x0000); /* reset GPIO */
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} else {
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pci_hose_write_config_byte(hose, dev, 0x93, 0x20); /* */
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}
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pci_hose_write_config_word(hose, dev, 0xa4, 0x8000); /* reset power management */
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pci_hose_read_config_dword(hose, dev, PCI_BASE_ADDRESS_0, &io_base);
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io_base &= ~0xfL;
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writeb(0x07, io_base+0x803); /* route CSC irq though ExCA and enable IRQ7 */
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writel(0, io_base+0x10); /* CLKRUN default */
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writel(0, io_base+0x20); /* CLKRUN default */
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}
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static struct pci_config_table pci_sc520_spunk_config_table[] = {
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{ 0x104c, 0xac50, PCI_ANY_ID, 0, 0x0a, 0, pci_sc520_spunk_configure_cardbus, { 0, 0, 0} },
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{ 0x104c, 0xac56, PCI_ANY_ID, 0, 0x0a, 0, pci_sc520_spunk_configure_cardbus, { 0, 0, 0} },
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{ 0, 0, 0, 0, 0, 0, NULL, {0,0,0}}
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};
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static struct pci_controller sc520_spunk_hose = {
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fixup_irq: pci_sc520_spunk_fixup_irq,
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config_table: pci_sc520_spunk_config_table,
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first_busno: 0x00,
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last_busno: 0xff,
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};
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void pci_init_board(void)
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{
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pci_sc520_init(&sc520_spunk_hose);
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}
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/*
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* This function should map a chunk of size bytes
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* of the system address space to the ISA bus
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*
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* The function will return the memory address
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* as seen by the host (which may very will be the
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* same as the bus address)
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*/
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u32 isa_map_rom(u32 bus_addr, int size)
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{
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u32 par;
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printf("isa_map_rom asked to map %d bytes at %x\n",
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size, bus_addr);
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par = size;
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if (par < 0x80000) {
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par = 0x80000;
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}
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par >>= 12;
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par--;
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par&=0x7f;
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par <<= 18;
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par |= (bus_addr>>12);
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par |= 0x50000000;
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printf ("setting PAR11 to %x\n", par);
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/* Map rom 0x10000 with PAR1 */
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sc520_mmcr->par[11] = par;
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return bus_addr;
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}
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/*
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* this function removed any mapping created
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* with pci_get_rom_window()
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*/
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void isa_unmap_rom(u32 addr)
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{
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printf("isa_unmap_rom asked to unmap %x", addr);
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if ((addr>>12) == (sc520_mmcr->par[11] & 0x3ffff)) {
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sc520_mmcr->par[11] = 0;
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printf(" done\n");
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return;
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}
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printf(" not ours\n");
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}
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#define PCI_ROM_TEMP_SPACE 0x10000
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/*
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* This function should map a chunk of size bytes
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* of the system address space to the PCI bus,
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* suitable to map PCI ROMS (bus address < 16M)
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* the function will return the host memory address
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* which should be converted into a bus address
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* before used to configure the PCI rom address
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* decoder
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*/
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u32 pci_get_rom_window(struct pci_controller *hose, int size)
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{
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u32 par;
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par = size;
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if (par < 0x80000) {
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par = 0x80000;
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}
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par >>= 16;
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par--;
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par&=0x7ff;
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par <<= 14;
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par |= (PCI_ROM_TEMP_SPACE>>16);
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par |= 0x72000000;
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printf ("setting PAR1 to %x\n", par);
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/* Map rom 0x10000 with PAR1 */
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sc520_mmcr->par[1] = par;
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return PCI_ROM_TEMP_SPACE;
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}
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/*
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* this function removed any mapping created
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* with pci_get_rom_window()
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*/
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void pci_remove_rom_window(struct pci_controller *hose, u32 addr)
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{
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printf("pci_remove_rom_window: %x", addr);
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if (addr == PCI_ROM_TEMP_SPACE) {
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sc520_mmcr->par[1] = 0;
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printf(" done\n");
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return;
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}
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printf(" not ours\n");
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}
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/*
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* This function is called in order to provide acces to the
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* legacy video I/O ports on the PCI bus.
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* After this function accesses to I/O ports 0x3b0-0x3bb and
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* 0x3c0-0x3df shuld result in transactions on the PCI bus.
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*
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*/
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int pci_enable_legacy_video_ports(struct pci_controller *hose)
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{
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/* Map video memory to 0xa0000*/
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sc520_mmcr->par[0] = 0x7200400a;
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/* forward all I/O accesses to PCI */
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sc520_mmcr->adddecctl = sc520_mmcr->adddecctl | IO_HOLE_DEST_PCI;
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/* so we map away all io ports to pci (only way to access pci io
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* below 0x400. But then we have to map back the portions that we dont
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* use so that the generate cycles on the GPIO bus where the sio and
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* ISA slots are connected, this requre the use of several PAR registers
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*/
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/* bring 0x100 - 0x2f7 back to ISA using PAR5 */
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sc520_mmcr->par[5] = 0x31f70100;
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/* com2 use 2f8-2ff */
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/* bring 0x300 - 0x3af back to ISA using PAR7 */
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sc520_mmcr->par[7] = 0x30af0300;
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/* vga use 3b0-3bb */
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/* bring 0x3bc - 0x3bf back to ISA using PAR8 */
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sc520_mmcr->par[8] = 0x300303bc;
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/* vga use 3c0-3df */
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/* bring 0x3e0 - 0x3f7 back to ISA using PAR9 */
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sc520_mmcr->par[9] = 0x301703e0;
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/* com1 use 3f8-3ff */
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return 0;
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}
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