// SPDX-License-Identifier: GPL-2.0-or-later /* * sata_via.c - VIA Serial ATA controllers * * Maintained by: Tejun Heo <[email protected]> * Please ALWAYS copy [email protected] * on emails. * * Copyright 2003-2004 Red Hat, Inc. All rights reserved. * Copyright 2003-2004 Jeff Garzik * * libata documentation is available via 'make {ps|pdf}docs', * as Documentation/driver-api/libata.rst * * Hardware documentation available under NDA. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/blkdev.h> #include <linux/delay.h> #include <linux/device.h> #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> #include <scsi/scsi_host.h> #include <linux/libata.h> #define DRV_NAME … #define DRV_VERSION … /* * vt8251 is different from other sata controllers of VIA. It has two * channels, each channel has both Master and Slave slot. */ enum board_ids_enum { … }; enum { … }; struct svia_priv { … }; static int vt6420_hotplug; module_param_named(vt6420_hotplug, vt6420_hotplug, int, 0644); MODULE_PARM_DESC(…) …; static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); #ifdef CONFIG_PM_SLEEP static int svia_pci_device_resume(struct pci_dev *pdev); #endif static int svia_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); static int svia_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); static int vt8251_scr_read(struct ata_link *link, unsigned int scr, u32 *val); static int vt8251_scr_write(struct ata_link *link, unsigned int scr, u32 val); static void svia_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); static void svia_noop_freeze(struct ata_port *ap); static int vt6420_prereset(struct ata_link *link, unsigned long deadline); static void vt6420_bmdma_start(struct ata_queued_cmd *qc); static int vt6421_pata_cable_detect(struct ata_port *ap); static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev); static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev); static void vt6421_error_handler(struct ata_port *ap); static const struct pci_device_id svia_pci_tbl[] = …; static struct pci_driver svia_pci_driver = …; static const struct scsi_host_template svia_sht = …; static struct ata_port_operations svia_base_ops = …; static struct ata_port_operations vt6420_sata_ops = …; static struct ata_port_operations vt6421_pata_ops = …; static struct ata_port_operations vt6421_sata_ops = …; static struct ata_port_operations vt8251_ops = …; static const struct ata_port_info vt6420_port_info = …; static const struct ata_port_info vt6421_sport_info = …; static const struct ata_port_info vt6421_pport_info = …; static const struct ata_port_info vt8251_port_info = …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_DEVICE_TABLE(pci, svia_pci_tbl); MODULE_VERSION(…); static int svia_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) { … } static int svia_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) { … } static int vt8251_scr_read(struct ata_link *link, unsigned int scr, u32 *val) { … } static int vt8251_scr_write(struct ata_link *link, unsigned int scr, u32 val) { … } /** * svia_tf_load - send taskfile registers to host controller * @ap: Port to which output is sent * @tf: ATA taskfile register set * * Outputs ATA taskfile to standard ATA host controller. * * This is to fix the internal bug of via chipsets, which will * reset the device register after changing the IEN bit on ctl * register. */ static void svia_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) { … } static void svia_noop_freeze(struct ata_port *ap) { … } /** * vt6420_prereset - prereset for vt6420 * @link: target ATA link * @deadline: deadline jiffies for the operation * * SCR registers on vt6420 are pieces of shit and may hang the * whole machine completely if accessed with the wrong timing. * To avoid such catastrophe, vt6420 doesn't provide generic SCR * access operations, but uses SStatus and SControl only during * boot probing in controlled way. * * As the old (pre EH update) probing code is proven to work, we * strictly follow the access pattern. * * LOCKING: * Kernel thread context (may sleep) * * RETURNS: * 0 on success, -errno otherwise. */ static int vt6420_prereset(struct ata_link *link, unsigned long deadline) { … } static void vt6420_bmdma_start(struct ata_queued_cmd *qc) { … } static int vt6421_pata_cable_detect(struct ata_port *ap) { … } static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev) { … } static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev) { … } static const unsigned int svia_bar_sizes[] = …; static const unsigned int vt6421_bar_sizes[] = …; static void __iomem *svia_scr_addr(void __iomem *addr, unsigned int port) { … } static void __iomem *vt6421_scr_addr(void __iomem *addr, unsigned int port) { … } static void vt6421_init_addrs(struct ata_port *ap) { … } static int vt6420_prepare_host(struct pci_dev *pdev, struct ata_host **r_host) { … } static int vt6421_prepare_host(struct pci_dev *pdev, struct ata_host **r_host) { … } static int vt8251_prepare_host(struct pci_dev *pdev, struct ata_host **r_host) { … } static void svia_wd_fix(struct pci_dev *pdev) { … } static irqreturn_t vt642x_interrupt(int irq, void *dev_instance) { … } static void vt6421_error_handler(struct ata_port *ap) { … } static void svia_configure(struct pci_dev *pdev, int board_id, struct svia_priv *hpriv) { … } static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { … } #ifdef CONFIG_PM_SLEEP static int svia_pci_device_resume(struct pci_dev *pdev) { … } #endif module_pci_driver(…) …;
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