1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * pata_jmicron.c - JMicron ATA driver for non AHCI mode. This drives the 4 * PATA port of the controller. The SATA ports are 5 * driven by AHCI in the usual configuration although 6 * this driver can handle other setups if we need it. 7 * 8 * (c) 2006 Red Hat 9 */ 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 24 typedef 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 pin 32 * @link: ATA link 33 * @deadline: deadline jiffies for the operation 34 * 35 * Perform the PATA port setup we need. 36 * 37 * On the Jmicron 361/363 there is a single PATA port that can be mapped 38 * either as primary or secondary (or neither). We don't do any policy 39 * and setup here. We assume that has been done by init_one and the 40 * BIOS. 41 */ 42 static 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 merged 58 as master/slave and the secondary as PATA, the other has only the 59 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 port 69 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 can 80 * actually do our cable checking etc. Thankfully we don't need 81 * 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 else 90 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 else 99 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 */ 109 110 static const struct scsi_host_template jmicron_sht = { 111 ATA_BMDMA_SHT(DRV_NAME), 112 }; 113 114 static 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 services 122 * @pdev: PCI device to register 123 * @id: PCI device ID 124 * 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 */ 133 134 static 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 } 149 150 static 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 }; 155 156 static 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_SLEEP 162 .suspend = ata_pci_device_suspend, 163 .resume = ata_pci_device_resume, 164 #endif 165 }; 166 167 module_pci_driver(jmicron_pci_driver); 168 169 MODULE_AUTHOR("Alan Cox"); 170 MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports"); 171 MODULE_LICENSE("GPL"); 172 MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl); 173 MODULE_VERSION(DRV_VERSION); 174 175