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Diffstat (limited to 'arch/arm/mach-ixp4xx/gtwx5715-pci.c')
-rw-r--r--arch/arm/mach-ixp4xx/gtwx5715-pci.c101
1 files changed, 101 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp4xx/gtwx5715-pci.c b/arch/arm/mach-ixp4xx/gtwx5715-pci.c
new file mode 100644
index 0000000..b180358
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/gtwx5715-pci.c
@@ -0,0 +1,101 @@
+/*
+ * arch/arm/mach-ixp4xx/gtwx5715-pci.c
+ *
+ * Gemtek GTWX5715 (Linksys WRV54G) board setup
+ *
+ * Copyright (C) 2004 George T. Joseph
+ * Derived from Coyote
+ *
+ * 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 <linux/pci.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <asm/mach-types.h>
+#include <asm/hardware.h>
+#include <asm/irq.h>
+#include <asm/arch/gtwx5715.h>
+#include <asm/mach/pci.h>
+
+extern void ixp4xx_pci_preinit(void);
+extern int ixp4xx_setup(int nr, struct pci_sys_data *sys);
+extern struct pci_bus *ixp4xx_scan_bus(int nr, struct pci_sys_data *sys);
+
+ /*
+ * The exact GPIO pins and IRQs are defined in arch-ixp4xx/gtwx5715.h
+ * Slot 0 isn't actually populated with a card connector but
+ * we initialize it anyway in case a future version has the
+ * slot populated or someone with good soldering skills has
+ * some free time.
+ */
+
+
+static void gtwx5715_init_gpio(u8 pin, u32 style)
+{
+ gpio_line_config(pin, style | IXP4XX_GPIO_ACTIVE_LOW);
+
+ if (style & IXP4XX_GPIO_IN) gpio_line_isr_clear(pin);
+}
+
+void __init gtwx5715_pci_preinit(void)
+{
+ gtwx5715_init_gpio(GTWX5715_PCI_SLOT0_INTA_GPIO, IXP4XX_GPIO_IN);
+ gtwx5715_init_gpio(GTWX5715_PCI_SLOT1_INTA_GPIO, IXP4XX_GPIO_IN);
+
+ ixp4xx_pci_preinit();
+}
+
+
+static int __init gtwx5715_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+{
+ int rc;
+ static int gtwx5715_irqmap
+ [GTWX5715_PCI_SLOT_COUNT]
+ [GTWX5715_PCI_INT_PIN_COUNT] = {
+ {GTWX5715_PCI_SLOT0_INTA_IRQ, GTWX5715_PCI_SLOT0_INTB_IRQ},
+ {GTWX5715_PCI_SLOT1_INTA_IRQ, GTWX5715_PCI_SLOT1_INTB_IRQ},
+};
+
+ if (slot >= GTWX5715_PCI_SLOT_COUNT ||
+ pin >= GTWX5715_PCI_INT_PIN_COUNT) rc = -1;
+ else
+ rc = gtwx5715_irqmap[slot][pin-1];
+
+ printk("%s: Mapped slot %d pin %d to IRQ %d\n", __FUNCTION__,slot, pin, rc);
+ return(rc);
+}
+
+struct hw_pci gtwx5715_pci __initdata = {
+ .nr_controllers = 1,
+ .preinit = gtwx5715_pci_preinit,
+ .swizzle = pci_std_swizzle,
+ .setup = ixp4xx_setup,
+ .scan = ixp4xx_scan_bus,
+ .map_irq = gtwx5715_map_irq,
+};
+
+int __init gtwx5715_pci_init(void)
+{
+ if (machine_is_gtwx5715())
+ {
+ pci_common_init(&gtwx5715_pci);
+ }
+
+ return 0;
+}
+
+subsys_initcall(gtwx5715_pci_init);