1 files changed, 271 insertions, 0 deletions
diff --git a/board/sc520_cdp/sc520_cdp_pci.c b/board/sc520_cdp/sc520_cdp_pci.c
new file mode 100644
index 0000000000..ccb79888dc
--- /dev/null
+++ b/board/sc520_cdp/sc520_cdp_pci.c
@@ -0,0 +1,271 @@
+/*
+ *
+ * (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 <asm/io.h>
+#include <asm/pci.h>
+#include <asm/ic/sc520.h>
+#include <asm/ic/pci.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#undef SC520_CDP_DEBUG
+
+#ifdef	SC520_CDP_DEBUG
+#define	PRINTF(fmt,args...)	printf (fmt ,##args)
+#else
+#define PRINTF(fmt,args...)
+#endif
+
+static void pci_sc520_cdp_fixup_irq(struct pci_controller *hose, pci_dev_t dev)
+{
+	/* 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 20:
+		pin+=SC520_PCI_INTA;
+		break;
+
+	case 19:
+		pin+=SC520_PCI_INTB;
+		break;
+
+	case 18:
+		pin+=SC520_PCI_INTC;
+		break;
+
+	case 17:
+		pin+=SC520_PCI_INTD;
+		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]);
+	}
+	PRINTF("fixup_irq: device %d pin %c irq %d\n",
+	       PCI_DEV(dev), 'A' + pin, sc520_pci_ints[pin]);
+}
+
+static struct pci_controller sc520_cdp_hose = {
+	fixup_irq: pci_sc520_cdp_fixup_irq,
+};
+
+void pci_init_board(void)
+{
+	pci_sc520_init(&sc520_cdp_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 - 0x1ef back to ISA using PAR5 */
+	sc520_mmcr->par[5] = 0x30ef0100;
+
+	/* IDE use 1f0-1f7 */
+
+	/* bring 0x1f8 - 0x2f7 back to ISA using PAR6 */
+	sc520_mmcr->par[6] = 0x30ff01f8;
+
+	/* 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 - 0x3f5 back to ISA using PAR9 */
+	sc520_mmcr->par[9] = 0x301503e0;
+
+	/* ide use 3f6 */
+
+	/* bring 0x3f7  back to ISA using PAR10 */
+	sc520_mmcr->par[10] = 0x300003f7;
+
+	/* com1 use 3f8-3ff */
+
+	return 0;
+}