18c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-only 28c2ecf20Sopenharmony_ci 38c2ecf20Sopenharmony_ci#include <linux/kernel.h> 48c2ecf20Sopenharmony_ci#include <linux/init.h> 58c2ecf20Sopenharmony_ci#include <linux/module.h> 68c2ecf20Sopenharmony_ci#include <linux/ide.h> 78c2ecf20Sopenharmony_ci 88c2ecf20Sopenharmony_ci#define DRV_NAME "ide-4drives" 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_cistatic bool probe_4drives; 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_cimodule_param_named(probe, probe_4drives, bool, 0); 138c2ecf20Sopenharmony_ciMODULE_PARM_DESC(probe, "probe for generic IDE chipset with 4 drives/port"); 148c2ecf20Sopenharmony_ci 158c2ecf20Sopenharmony_cistatic void ide_4drives_init_dev(ide_drive_t *drive) 168c2ecf20Sopenharmony_ci{ 178c2ecf20Sopenharmony_ci if (drive->hwif->channel) 188c2ecf20Sopenharmony_ci drive->select ^= 0x20; 198c2ecf20Sopenharmony_ci} 208c2ecf20Sopenharmony_ci 218c2ecf20Sopenharmony_cistatic const struct ide_port_ops ide_4drives_port_ops = { 228c2ecf20Sopenharmony_ci .init_dev = ide_4drives_init_dev, 238c2ecf20Sopenharmony_ci}; 248c2ecf20Sopenharmony_ci 258c2ecf20Sopenharmony_cistatic const struct ide_port_info ide_4drives_port_info = { 268c2ecf20Sopenharmony_ci .port_ops = &ide_4drives_port_ops, 278c2ecf20Sopenharmony_ci .host_flags = IDE_HFLAG_SERIALIZE | IDE_HFLAG_NO_DMA | 288c2ecf20Sopenharmony_ci IDE_HFLAG_4DRIVES, 298c2ecf20Sopenharmony_ci .chipset = ide_4drives, 308c2ecf20Sopenharmony_ci}; 318c2ecf20Sopenharmony_ci 328c2ecf20Sopenharmony_cistatic int __init ide_4drives_init(void) 338c2ecf20Sopenharmony_ci{ 348c2ecf20Sopenharmony_ci unsigned long base = 0x1f0, ctl = 0x3f6; 358c2ecf20Sopenharmony_ci struct ide_hw hw, *hws[] = { &hw, &hw }; 368c2ecf20Sopenharmony_ci 378c2ecf20Sopenharmony_ci if (probe_4drives == 0) 388c2ecf20Sopenharmony_ci return -ENODEV; 398c2ecf20Sopenharmony_ci 408c2ecf20Sopenharmony_ci if (!request_region(base, 8, DRV_NAME)) { 418c2ecf20Sopenharmony_ci printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 428c2ecf20Sopenharmony_ci DRV_NAME, base, base + 7); 438c2ecf20Sopenharmony_ci return -EBUSY; 448c2ecf20Sopenharmony_ci } 458c2ecf20Sopenharmony_ci 468c2ecf20Sopenharmony_ci if (!request_region(ctl, 1, DRV_NAME)) { 478c2ecf20Sopenharmony_ci printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n", 488c2ecf20Sopenharmony_ci DRV_NAME, ctl); 498c2ecf20Sopenharmony_ci release_region(base, 8); 508c2ecf20Sopenharmony_ci return -EBUSY; 518c2ecf20Sopenharmony_ci } 528c2ecf20Sopenharmony_ci 538c2ecf20Sopenharmony_ci memset(&hw, 0, sizeof(hw)); 548c2ecf20Sopenharmony_ci 558c2ecf20Sopenharmony_ci ide_std_init_ports(&hw, base, ctl); 568c2ecf20Sopenharmony_ci hw.irq = 14; 578c2ecf20Sopenharmony_ci 588c2ecf20Sopenharmony_ci return ide_host_add(&ide_4drives_port_info, hws, 2, NULL); 598c2ecf20Sopenharmony_ci} 608c2ecf20Sopenharmony_ci 618c2ecf20Sopenharmony_cimodule_init(ide_4drives_init); 628c2ecf20Sopenharmony_ci 638c2ecf20Sopenharmony_ciMODULE_AUTHOR("Bartlomiej Zolnierkiewicz"); 648c2ecf20Sopenharmony_ciMODULE_DESCRIPTION("generic IDE chipset with 4 drives/port support"); 658c2ecf20Sopenharmony_ciMODULE_LICENSE("GPL"); 66