Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Virtual EISA root driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * Acts as a placeholder if we don't have a proper EISA bridge.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * (C) 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  */
^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/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/eisa.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/moduleparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #if defined(CONFIG_ALPHA_JENSEN) || defined(CONFIG_EISA_VLB_PRIMING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define EISA_FORCE_PROBE_DEFAULT 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define EISA_FORCE_PROBE_DEFAULT 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static int force_probe = EISA_FORCE_PROBE_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static void virtual_eisa_release (struct device *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /* The default EISA device parent (virtual root device).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)  * Now use a platform device, since that's the obvious choice. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static struct platform_device eisa_root_dev = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	.name = "eisa",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	.id   = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	.dev  = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		.release = virtual_eisa_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static struct eisa_root_device eisa_bus_root = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	.dev		= &eisa_root_dev.dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	.bus_base_addr	= 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	.res		= &ioport_resource,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	.slots		= EISA_MAX_SLOTS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	.dma_mask	= 0xffffffff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static void virtual_eisa_release (struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	/* nothing really to do here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static int __init virtual_eisa_root_init (void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	if ((r = platform_device_register (&eisa_root_dev)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 		return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	eisa_bus_root.force_probe = force_probe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	dev_set_drvdata(&eisa_root_dev.dev, &eisa_bus_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	if (eisa_root_register (&eisa_bus_root)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 		/* A real bridge may have been registered before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 		 * us. So quietly unregister. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 		platform_device_unregister (&eisa_root_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) module_param (force_probe, int, 0444);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) device_initcall (virtual_eisa_root_init);