// SPDX-License-Identifier: GPL-2.0-only /* * New ATA layer SC1200 driver Alan Cox <[email protected]> * * TODO: Mode selection filtering * TODO: Needs custom DMA cleanup code * * Based very heavily on * * linux/drivers/ide/pci/sc1200.c Version 0.91 28-Jan-2003 * * Copyright (C) 2000-2002 Mark Lord <[email protected]> * May be copied or modified under the terms of the GNU General Public License * * Development of this chipset driver was funded * by the nice folks at National Semiconductor. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/blkdev.h> #include <linux/delay.h> #include <scsi/scsi_host.h> #include <linux/libata.h> #define DRV_NAME … #define DRV_VERSION … #define SC1200_REV_A … #define SC1200_REV_B1 … #define SC1200_REV_B3 … #define SC1200_REV_C1 … #define SC1200_REV_D1 … /** * sc1200_clock - PCI clock * * Return the PCI bus clocking for the SC1200 chipset configuration * in use. We return 0 for 33MHz 1 for 48MHz and 2 for 66Mhz */ static int sc1200_clock(void) { … } /** * sc1200_set_piomode - PIO setup * @ap: ATA interface * @adev: device on the interface * * Set our PIO requirements. This is fairly simple on the SC1200 */ static void sc1200_set_piomode(struct ata_port *ap, struct ata_device *adev) { … } /** * sc1200_set_dmamode - DMA timing setup * @ap: ATA interface * @adev: Device being configured * * We cannot mix MWDMA and UDMA without reloading timings each switch * master to slave. */ static void sc1200_set_dmamode(struct ata_port *ap, struct ata_device *adev) { … } /** * sc1200_qc_issue - command issue * @qc: command pending * * Called when the libata layer is about to issue a command. We wrap * this interface so that we can load the correct ATA timings if * necessary. Specifically we have a problem that there is only * one MWDMA/UDMA bit. */ static unsigned int sc1200_qc_issue(struct ata_queued_cmd *qc) { … } /** * sc1200_qc_defer - implement serialization * @qc: command * * Serialize command issue on this controller. */ static int sc1200_qc_defer(struct ata_queued_cmd *qc) { … } static const struct scsi_host_template sc1200_sht = …; static struct ata_port_operations sc1200_port_ops = …; /** * sc1200_init_one - Initialise an SC1200 * @dev: PCI device * @id: Entry in match table * * Just throw the needed data at the libata helper and it does all * our work. */ static int sc1200_init_one(struct pci_dev *dev, const struct pci_device_id *id) { … } static const struct pci_device_id sc1200[] = …; static struct pci_driver sc1200_pci_driver = …; module_pci_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_DEVICE_TABLE(pci, sc1200); MODULE_VERSION(…);
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