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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
| commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
| tree | a94efe259b9009378be6d90eb30d2b019d95c194 /arch/arm/mach-ixp4xx/miccpt-pci.c | |
| parent | Initial commit. (diff) | |
| download | linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip | |
Adding upstream version 5.10.209.upstream/5.10.209
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/mach-ixp4xx/miccpt-pci.c')
| -rw-r--r-- | arch/arm/mach-ixp4xx/miccpt-pci.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp4xx/miccpt-pci.c b/arch/arm/mach-ixp4xx/miccpt-pci.c new file mode 100644 index 000000000..55a36537e --- /dev/null +++ b/arch/arm/mach-ixp4xx/miccpt-pci.c @@ -0,0 +1,75 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * arch/arm/mach-ixp4xx/miccpt-pci.c + * + * MICCPT board-level PCI initialization + * + * Copyright (C) 2002 Intel Corporation. + * Copyright (C) 2003-2004 MontaVista Software, Inc. + * Copyright (C) 2006 OMICRON electronics GmbH + * + * Author: Michael Jochum <michael.jochum@omicron.at> + */ + +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/irq.h> +#include <asm/mach/pci.h> +#include <asm/irq.h> +#include <mach/hardware.h> +#include <asm/mach-types.h> + +#include "irqs.h" + +#define MAX_DEV 4 +#define IRQ_LINES 4 + +/* PCI controller GPIO to IRQ pin mappings */ +#define INTA 1 +#define INTB 2 +#define INTC 3 +#define INTD 4 + + +void __init miccpt_pci_preinit(void) +{ + irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW); + irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW); + irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW); + irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW); + ixp4xx_pci_preinit(); +} + +static int __init miccpt_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +{ + static int pci_irq_table[IRQ_LINES] = { + IXP4XX_GPIO_IRQ(INTA), + IXP4XX_GPIO_IRQ(INTB), + IXP4XX_GPIO_IRQ(INTC), + IXP4XX_GPIO_IRQ(INTD) + }; + + if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES) + return pci_irq_table[(slot + pin - 2) % 4]; + + return -1; +} + +struct hw_pci miccpt_pci __initdata = { + .nr_controllers = 1, + .ops = &ixp4xx_ops, + .preinit = miccpt_pci_preinit, + .setup = ixp4xx_setup, + .map_irq = miccpt_map_irq, +}; + +int __init miccpt_pci_init(void) +{ + if (machine_is_miccpt()) + pci_common_init(&miccpt_pci); + return 0; +} + +subsys_initcall(miccpt_pci_init); |