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174 lines
4.4 KiB
174 lines
4.4 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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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/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_bmdma_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_SLEEP |
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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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module_pci_driver(jmicron_pci_driver); |
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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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