![Alan Cox](/assets/img/avatar_default.png)
This allows parallel scan and the like to be set without having to stop using the existing full helper functions. This patch merely adds the argument and fixes up the callers. It doesn't undo the special cases already in the tree or add any new parallel callers. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
186 lines
4.6 KiB
C
186 lines
4.6 KiB
C
/*
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* pata_jmicron.c - JMicron ATA driver for non AHCI mode. This drives the
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* PATA port of the controller. The SATA ports are
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* driven by AHCI in the usual configuration although
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* this driver can handle other setups if we need it.
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*
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* (c) 2006 Red Hat
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <scsi/scsi_host.h>
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#include <linux/libata.h>
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#include <linux/ata.h>
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#define DRV_NAME "pata_jmicron"
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#define DRV_VERSION "0.1.5"
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typedef enum {
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PORT_PATA0 = 0,
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PORT_PATA1 = 1,
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PORT_SATA = 2,
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} port_type;
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/**
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* jmicron_pre_reset - check for 40/80 pin
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* @link: ATA link
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* @deadline: deadline jiffies for the operation
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*
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* Perform the PATA port setup we need.
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*
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* On the Jmicron 361/363 there is a single PATA port that can be mapped
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* either as primary or secondary (or neither). We don't do any policy
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* and setup here. We assume that has been done by init_one and the
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* BIOS.
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*/
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static int jmicron_pre_reset(struct ata_link *link, unsigned long deadline)
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{
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struct ata_port *ap = link->ap;
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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u32 control;
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u32 control5;
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int port_mask = 1<< (4 * ap->port_no);
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int port = ap->port_no;
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port_type port_map[2];
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/* Check if our port is enabled */
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pci_read_config_dword(pdev, 0x40, &control);
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if ((control & port_mask) == 0)
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return -ENOENT;
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/* There are two basic mappings. One has the two SATA ports merged
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as master/slave and the secondary as PATA, the other has only the
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SATA port mapped */
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if (control & (1 << 23)) {
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port_map[0] = PORT_SATA;
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port_map[1] = PORT_PATA0;
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} else {
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port_map[0] = PORT_SATA;
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port_map[1] = PORT_SATA;
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}
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/* The 365/366 may have this bit set to map the second PATA port
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as the internal primary channel */
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pci_read_config_dword(pdev, 0x80, &control5);
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if (control5 & (1<<24))
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port_map[0] = PORT_PATA1;
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/* The two ports may then be logically swapped by the firmware */
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if (control & (1 << 22))
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port = port ^ 1;
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/*
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* Now we know which physical port we are talking about we can
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* actually do our cable checking etc. Thankfully we don't need
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* to do the plumbing for other cases.
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*/
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switch (port_map[port]) {
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case PORT_PATA0:
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if ((control & (1 << 5)) == 0)
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return -ENOENT;
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if (control & (1 << 3)) /* 40/80 pin primary */
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ap->cbl = ATA_CBL_PATA40;
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else
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ap->cbl = ATA_CBL_PATA80;
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break;
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case PORT_PATA1:
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/* Bit 21 is set if the port is enabled */
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if ((control5 & (1 << 21)) == 0)
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return -ENOENT;
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if (control5 & (1 << 19)) /* 40/80 pin secondary */
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ap->cbl = ATA_CBL_PATA40;
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else
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ap->cbl = ATA_CBL_PATA80;
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break;
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case PORT_SATA:
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ap->cbl = ATA_CBL_SATA;
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break;
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}
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return ata_sff_prereset(link, deadline);
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}
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/* No PIO or DMA methods needed for this device */
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static struct scsi_host_template jmicron_sht = {
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ATA_BMDMA_SHT(DRV_NAME),
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};
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static struct ata_port_operations jmicron_ops = {
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.inherits = &ata_bmdma_port_ops,
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.prereset = jmicron_pre_reset,
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};
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/**
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* jmicron_init_one - Register Jmicron ATA PCI device with kernel services
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* @pdev: PCI device to register
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* @ent: Entry in jmicron_pci_tbl matching with @pdev
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*
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* Called from kernel PCI layer.
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*
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* LOCKING:
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* Inherited from PCI layer (may sleep).
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*
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* RETURNS:
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* Zero on success, or -ERRNO value.
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*/
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static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
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{
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static const struct ata_port_info info = {
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = ATA_PIO4,
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.mwdma_mask = ATA_MWDMA2,
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.udma_mask = ATA_UDMA5,
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.port_ops = &jmicron_ops,
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};
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const struct ata_port_info *ppi[] = { &info, NULL };
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return ata_pci_sff_init_one(pdev, ppi, &jmicron_sht, NULL, 0);
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}
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static const struct pci_device_id jmicron_pci_tbl[] = {
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{ PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
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PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },
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{ } /* terminate list */
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};
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static struct pci_driver jmicron_pci_driver = {
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.name = DRV_NAME,
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.id_table = jmicron_pci_tbl,
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.probe = jmicron_init_one,
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.remove = ata_pci_remove_one,
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#ifdef CONFIG_PM
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.suspend = ata_pci_device_suspend,
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.resume = ata_pci_device_resume,
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#endif
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};
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static int __init jmicron_init(void)
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{
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return pci_register_driver(&jmicron_pci_driver);
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}
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static void __exit jmicron_exit(void)
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{
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pci_unregister_driver(&jmicron_pci_driver);
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}
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module_init(jmicron_init);
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module_exit(jmicron_exit);
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
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MODULE_VERSION(DRV_VERSION);
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