// SPDX-License-Identifier: GPL-2.0-only /* * pata_amd.c - AMD PATA for new ATA layer * (C) 2005-2006 Red Hat Inc * * Based on pata-sil680. Errata information is taken from data sheets * and the amd74xx.c driver by Vojtech Pavlik. Nvidia SATA devices are * claimed by sata-nv.c. * * TODO: * Variable system clock when/if it makes sense * Power management on ports * * * Documentation publicly available. */ #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 … /** * timing_setup - shared timing computation and load * @ap: ATA port being set up * @adev: drive being configured * @offset: port offset * @speed: target speed * @clock: clock multiplier (number of times 33MHz for this part) * * Perform the actual timing set up for Nvidia or AMD PATA devices. * The actual devices vary so they all call into this helper function * providing the clock multipler and offset (because AMD and Nvidia put * the ports at different locations). */ static void timing_setup(struct ata_port *ap, struct ata_device *adev, int offset, int speed, int clock) { … } /** * amd_pre_reset - perform reset handling * @link: ATA link * @deadline: deadline jiffies for the operation * * Reset sequence checking enable bits to see which ports are * active. */ static int amd_pre_reset(struct ata_link *link, unsigned long deadline) { … } /** * amd_cable_detect - report cable type * @ap: port * * AMD controller/BIOS setups record the cable type in word 0x42 */ static int amd_cable_detect(struct ata_port *ap) { … } /** * amd_fifo_setup - set the PIO FIFO for ATA/ATAPI * @ap: ATA interface * * Set the PCI fifo for this device according to the devices present * on the bus at this point in time. We need to turn the post write buffer * off for ATAPI devices as we may need to issue a word sized write to the * device as the final I/O */ static void amd_fifo_setup(struct ata_port *ap) { … } /** * amd33_set_piomode - set initial PIO mode data * @ap: ATA interface * @adev: ATA device * * Program the AMD registers for PIO mode. */ static void amd33_set_piomode(struct ata_port *ap, struct ata_device *adev) { … } static void amd66_set_piomode(struct ata_port *ap, struct ata_device *adev) { … } static void amd100_set_piomode(struct ata_port *ap, struct ata_device *adev) { … } static void amd133_set_piomode(struct ata_port *ap, struct ata_device *adev) { … } /** * amd33_set_dmamode - set initial DMA mode data * @ap: ATA interface * @adev: ATA device * * Program the MWDMA/UDMA modes for the AMD and Nvidia * chipset. */ static void amd33_set_dmamode(struct ata_port *ap, struct ata_device *adev) { … } static void amd66_set_dmamode(struct ata_port *ap, struct ata_device *adev) { … } static void amd100_set_dmamode(struct ata_port *ap, struct ata_device *adev) { … } static void amd133_set_dmamode(struct ata_port *ap, struct ata_device *adev) { … } /* Both host-side and drive-side detection results are worthless on NV * PATAs. Ignore them and just follow what BIOS configured. Both the * current configuration in PCI config reg and ACPI GTM result are * cached during driver attach and are consulted to select transfer * mode. */ static unsigned int nv_mode_filter(struct ata_device *dev, unsigned int xfer_mask) { … } /** * nv_pre_reset - cable detection * @link: ATA link * @deadline: deadline jiffies for the operation * * Perform cable detection. The BIOS stores this in PCI config * space for us. */ static int nv_pre_reset(struct ata_link *link, unsigned long deadline) { … } /** * nv100_set_piomode - set initial PIO mode data * @ap: ATA interface * @adev: ATA device * * Program the AMD registers for PIO mode. */ static void nv100_set_piomode(struct ata_port *ap, struct ata_device *adev) { … } static void nv133_set_piomode(struct ata_port *ap, struct ata_device *adev) { … } /** * nv100_set_dmamode - set initial DMA mode data * @ap: ATA interface * @adev: ATA device * * Program the MWDMA/UDMA modes for the AMD and Nvidia * chipset. */ static void nv100_set_dmamode(struct ata_port *ap, struct ata_device *adev) { … } static void nv133_set_dmamode(struct ata_port *ap, struct ata_device *adev) { … } static void nv_host_stop(struct ata_host *host) { … } static const struct scsi_host_template amd_sht = …; static const struct ata_port_operations amd_base_port_ops = …; static struct ata_port_operations amd33_port_ops = …; static struct ata_port_operations amd66_port_ops = …; static struct ata_port_operations amd100_port_ops = …; static struct ata_port_operations amd133_port_ops = …; static const struct ata_port_operations nv_base_port_ops = …; static struct ata_port_operations nv100_port_ops = …; static struct ata_port_operations nv133_port_ops = …; static void amd_clear_fifo(struct pci_dev *pdev) { … } static int amd_init_one(struct pci_dev *pdev, const struct pci_device_id *id) { … } #ifdef CONFIG_PM_SLEEP static int amd_reinit_one(struct pci_dev *pdev) { … } #endif static const struct pci_device_id amd[] = …; static struct pci_driver amd_pci_driver = …; module_pci_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_DEVICE_TABLE(pci, amd); MODULE_VERSION(…);
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