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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * pata_jmicron.c - JMicron ATA driver for non AHCI mode. This drives the4 * PATA port of the controller. The SATA ports are5 * driven by AHCI in the usual configuration although6 * this driver can handle other setups if we need it.7 *8 * (c) 2006 Red Hat9 */10 11#include <linux/kernel.h>12#include <linux/module.h>13#include <linux/pci.h>14#include <linux/blkdev.h>15#include <linux/delay.h>16#include <linux/device.h>17#include <scsi/scsi_host.h>18#include <linux/libata.h>19#include <linux/ata.h>20 21#define DRV_NAME "pata_jmicron"22#define DRV_VERSION "0.1.5"23 24typedef enum {25 PORT_PATA0 = 0,26 PORT_PATA1 = 1,27 PORT_SATA = 2,28} port_type;29 30/**31 * jmicron_pre_reset - check for 40/80 pin32 * @link: ATA link33 * @deadline: deadline jiffies for the operation34 *35 * Perform the PATA port setup we need.36 *37 * On the Jmicron 361/363 there is a single PATA port that can be mapped38 * either as primary or secondary (or neither). We don't do any policy39 * and setup here. We assume that has been done by init_one and the40 * BIOS.41 */42static int jmicron_pre_reset(struct ata_link *link, unsigned long deadline)43{44 struct ata_port *ap = link->ap;45 struct pci_dev *pdev = to_pci_dev(ap->host->dev);46 u32 control;47 u32 control5;48 int port_mask = 1<< (4 * ap->port_no);49 int port = ap->port_no;50 port_type port_map[2];51 52 /* Check if our port is enabled */53 pci_read_config_dword(pdev, 0x40, &control);54 if ((control & port_mask) == 0)55 return -ENOENT;56 57 /* There are two basic mappings. One has the two SATA ports merged58 as master/slave and the secondary as PATA, the other has only the59 SATA port mapped */60 if (control & (1 << 23)) {61 port_map[0] = PORT_SATA;62 port_map[1] = PORT_PATA0;63 } else {64 port_map[0] = PORT_SATA;65 port_map[1] = PORT_SATA;66 }67 68 /* The 365/366 may have this bit set to map the second PATA port69 as the internal primary channel */70 pci_read_config_dword(pdev, 0x80, &control5);71 if (control5 & (1<<24))72 port_map[0] = PORT_PATA1;73 74 /* The two ports may then be logically swapped by the firmware */75 if (control & (1 << 22))76 port = port ^ 1;77 78 /*79 * Now we know which physical port we are talking about we can80 * actually do our cable checking etc. Thankfully we don't need81 * to do the plumbing for other cases.82 */83 switch (port_map[port]) {84 case PORT_PATA0:85 if ((control & (1 << 5)) == 0)86 return -ENOENT;87 if (control & (1 << 3)) /* 40/80 pin primary */88 ap->cbl = ATA_CBL_PATA40;89 else90 ap->cbl = ATA_CBL_PATA80;91 break;92 case PORT_PATA1:93 /* Bit 21 is set if the port is enabled */94 if ((control5 & (1 << 21)) == 0)95 return -ENOENT;96 if (control5 & (1 << 19)) /* 40/80 pin secondary */97 ap->cbl = ATA_CBL_PATA40;98 else99 ap->cbl = ATA_CBL_PATA80;100 break;101 case PORT_SATA:102 ap->cbl = ATA_CBL_SATA;103 break;104 }105 return ata_sff_prereset(link, deadline);106}107 108/* No PIO or DMA methods needed for this device */109 110static const struct scsi_host_template jmicron_sht = {111 ATA_BMDMA_SHT(DRV_NAME),112};113 114static struct ata_port_operations jmicron_ops = {115 .inherits = &ata_bmdma_port_ops,116 .prereset = jmicron_pre_reset,117};118 119 120/**121 * jmicron_init_one - Register Jmicron ATA PCI device with kernel services122 * @pdev: PCI device to register123 * @id: PCI device ID124 *125 * Called from kernel PCI layer.126 *127 * LOCKING:128 * Inherited from PCI layer (may sleep).129 *130 * RETURNS:131 * Zero on success, or -ERRNO value.132 */133 134static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *id)135{136 static const struct ata_port_info info = {137 .flags = ATA_FLAG_SLAVE_POSS,138 139 .pio_mask = ATA_PIO4,140 .mwdma_mask = ATA_MWDMA2,141 .udma_mask = ATA_UDMA5,142 143 .port_ops = &jmicron_ops,144 };145 const struct ata_port_info *ppi[] = { &info, NULL };146 147 return ata_pci_bmdma_init_one(pdev, ppi, &jmicron_sht, NULL, 0);148}149 150static const struct pci_device_id jmicron_pci_tbl[] = {151 { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,152 PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },153 { } /* terminate list */154};155 156static struct pci_driver jmicron_pci_driver = {157 .name = DRV_NAME,158 .id_table = jmicron_pci_tbl,159 .probe = jmicron_init_one,160 .remove = ata_pci_remove_one,161#ifdef CONFIG_PM_SLEEP162 .suspend = ata_pci_device_suspend,163 .resume = ata_pci_device_resume,164#endif165};166 167module_pci_driver(jmicron_pci_driver);168 169MODULE_AUTHOR("Alan Cox");170MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports");171MODULE_LICENSE("GPL");172MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);173MODULE_VERSION(DRV_VERSION);174 175