// SPDX-License-Identifier: GPL-2.0-only /* * sata_inic162x.c - Driver for Initio 162x SATA controllers * * Copyright 2006 SUSE Linux Products GmbH * Copyright 2006 Tejun Heo <[email protected]> * * **** WARNING **** * * This driver never worked properly and unfortunately data corruption is * relatively common. There isn't anyone working on the driver and there's * no support from the vendor. Do not use this driver in any production * environment. * * http://thread.gmane.org/gmane.linux.debian.devel.bugs.rc/378525/focus=54491 * https://bugzilla.kernel.org/show_bug.cgi?id=60565 * * ***************** * * This controller is eccentric and easily locks up if something isn't * right. Documentation is available at initio's website but it only * documents registers (not programming model). * * This driver has interesting history. The first version was written * from the documentation and a 2.4 IDE driver posted on a Taiwan * company, which didn't use any IDMA features and couldn't handle * LBA48. The resulting driver couldn't handle LBA48 devices either * making it pretty useless. * * After a while, initio picked the driver up, renamed it to * sata_initio162x, updated it to use IDMA for ATA DMA commands and * posted it on their website. It only used ATA_PROT_DMA for IDMA and * attaching both devices and issuing IDMA and !IDMA commands * simultaneously broke it due to PIRQ masking interaction but it did * show how to use the IDMA (ADMA + some initio specific twists) * engine. * * Then, I picked up their changes again and here's the usable driver * which uses IDMA for everything. Everything works now including * LBA48, CD/DVD burning, suspend/resume and hotplug. There are some * issues tho. Result Tf is not resported properly, NCQ isn't * supported yet and CD/DVD writing works with DMA assisted PIO * protocol (which, for native SATA devices, shouldn't cause any * noticeable difference). * * Anyways, so, here's finally a working driver for inic162x. Enjoy! * * initio: If you guys wanna improve the driver regarding result TF * access and other stuff, please feel free to contact me. I'll be * happy to assist. */ #include <linux/gfp.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> #include <scsi/scsi_host.h> #include <linux/libata.h> #include <linux/blkdev.h> #include <scsi/scsi_device.h> #define DRV_NAME … #define DRV_VERSION … enum { … }; /* Comman Parameter Block */ struct inic_cpb { … } __packed; /* Physical Region Descriptor */ struct inic_prd { … } __packed; struct inic_pkt { … } __packed; struct inic_host_priv { … }; struct inic_port_priv { … }; static const struct scsi_host_template inic_sht = …; static const int scr_map[] = …; static void __iomem *inic_port_base(struct ata_port *ap) { … } static void inic_reset_port(void __iomem *port_base) { … } static int inic_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val) { … } static int inic_scr_write(struct ata_link *link, unsigned sc_reg, u32 val) { … } static void inic_stop_idma(struct ata_port *ap) { … } static void inic_host_err_intr(struct ata_port *ap, u8 irq_stat, u16 idma_stat) { … } static void inic_host_intr(struct ata_port *ap) { … } static irqreturn_t inic_interrupt(int irq, void *dev_instance) { … } static int inic_check_atapi_dma(struct ata_queued_cmd *qc) { … } static void inic_fill_sg(struct inic_prd *prd, struct ata_queued_cmd *qc) { … } static enum ata_completion_errors inic_qc_prep(struct ata_queued_cmd *qc) { … } static unsigned int inic_qc_issue(struct ata_queued_cmd *qc) { … } static void inic_tf_read(struct ata_port *ap, struct ata_taskfile *tf) { … } static void inic_qc_fill_rtf(struct ata_queued_cmd *qc) { … } static void inic_freeze(struct ata_port *ap) { … } static void inic_thaw(struct ata_port *ap) { … } static int inic_check_ready(struct ata_link *link) { … } /* * SRST and SControl hardreset don't give valid signature on this * controller. Only controller specific hardreset mechanism works. */ static int inic_hardreset(struct ata_link *link, unsigned int *class, unsigned long deadline) { … } static void inic_error_handler(struct ata_port *ap) { … } static void inic_post_internal_cmd(struct ata_queued_cmd *qc) { … } static void init_port(struct ata_port *ap) { … } static int inic_port_resume(struct ata_port *ap) { … } static int inic_port_start(struct ata_port *ap) { … } static struct ata_port_operations inic_port_ops = …; static const struct ata_port_info inic_port_info = …; static int init_controller(void __iomem *mmio_base, u16 hctl) { … } #ifdef CONFIG_PM_SLEEP static int inic_pci_device_resume(struct pci_dev *pdev) { … } #endif static int inic_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { … } static const struct pci_device_id inic_pci_tbl[] = …; static struct pci_driver inic_pci_driver = …; module_pci_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_DEVICE_TABLE(pci, inic_pci_tbl); MODULE_VERSION(…);
Codebase Browser
linux