Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * linux/arch/arm/mach-footbridge/personal-pci.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * PCI bios-type initialisation for PCI machines
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Bits taken from various places.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/mach/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/mach-types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static int irqmap_personal_server[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	IRQ_IN0, IRQ_IN1, IRQ_IN2, IRQ_IN3, 0, 0, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	IRQ_DOORBELLHOST, IRQ_DMA1, IRQ_DMA2, IRQ_PCI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static int personal_server_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	unsigned char line;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	if (line > 0x40 && line <= 0x5f) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		/* line corresponds to the bit controlling this interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		 * in the footbridge.  Ignore the first 8 interrupt bits,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		 * look up the rest in the map.  IN0 is bit number 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		return irqmap_personal_server[(line & 0x1f) - 8];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	} else if (line == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		/* no interrupt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 		return irqmap_personal_server[(line - 1) & 3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static struct hw_pci personal_server_pci __initdata = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	.map_irq		= personal_server_map_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	.nr_controllers		= 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	.ops			= &dc21285_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	.setup			= dc21285_setup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	.preinit		= dc21285_preinit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	.postinit		= dc21285_postinit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static int __init personal_pci_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	if (machine_is_personal_server())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 		pci_common_init(&personal_server_pci);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) subsys_initcall(personal_pci_init);