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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 | // SPDX-License-Identifier: GPL-2.0-only /* * pata_jmicron.c - JMicron ATA driver for non AHCI mode. This drives the * PATA port of the controller. The SATA ports are * driven by AHCI in the usual configuration although * this driver can handle other setups if we need it. * * (c) 2006 Red Hat */ #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_host.h> #include <linux/libata.h> #include <linux/ata.h> #define DRV_NAME "pata_jmicron" #define DRV_VERSION "0.1.5" typedef enum { PORT_PATA0 = 0, PORT_PATA1 = 1, PORT_SATA = 2, } port_type; /** * jmicron_pre_reset - check for 40/80 pin * @link: ATA link * @deadline: deadline jiffies for the operation * * Perform the PATA port setup we need. * * On the Jmicron 361/363 there is a single PATA port that can be mapped * either as primary or secondary (or neither). We don't do any policy * and setup here. We assume that has been done by init_one and the * BIOS. */ static int jmicron_pre_reset(struct ata_link *link, unsigned long deadline) { struct ata_port *ap = link->ap; struct pci_dev *pdev = to_pci_dev(ap->host->dev); u32 control; u32 control5; int port_mask = 1<< (4 * ap->port_no); int port = ap->port_no; port_type port_map[2]; /* Check if our port is enabled */ pci_read_config_dword(pdev, 0x40, &control); if ((control & port_mask) == 0) return -ENOENT; /* There are two basic mappings. One has the two SATA ports merged as master/slave and the secondary as PATA, the other has only the SATA port mapped */ if (control & (1 << 23)) { port_map[0] = PORT_SATA; port_map[1] = PORT_PATA0; } else { port_map[0] = PORT_SATA; port_map[1] = PORT_SATA; } /* The 365/366 may have this bit set to map the second PATA port as the internal primary channel */ pci_read_config_dword(pdev, 0x80, &control5); if (control5 & (1<<24)) port_map[0] = PORT_PATA1; /* The two ports may then be logically swapped by the firmware */ if (control & (1 << 22)) port = port ^ 1; /* * Now we know which physical port we are talking about we can * actually do our cable checking etc. Thankfully we don't need * to do the plumbing for other cases. */ switch (port_map[port]) { case PORT_PATA0: if ((control & (1 << 5)) == 0) return -ENOENT; if (control & (1 << 3)) /* 40/80 pin primary */ ap->cbl = ATA_CBL_PATA40; else ap->cbl = ATA_CBL_PATA80; break; case PORT_PATA1: /* Bit 21 is set if the port is enabled */ if ((control5 & (1 << 21)) == 0) return -ENOENT; if (control5 & (1 << 19)) /* 40/80 pin secondary */ ap->cbl = ATA_CBL_PATA40; else ap->cbl = ATA_CBL_PATA80; break; case PORT_SATA: ap->cbl = ATA_CBL_SATA; break; } return ata_sff_prereset(link, deadline); } /* No PIO or DMA methods needed for this device */ static const struct scsi_host_template jmicron_sht = { ATA_BMDMA_SHT(DRV_NAME), }; static struct ata_port_operations jmicron_ops = { .inherits = &ata_bmdma_port_ops, .prereset = jmicron_pre_reset, }; /** * jmicron_init_one - Register Jmicron ATA PCI device with kernel services * @pdev: PCI device to register * @id: PCI device ID * * Called from kernel PCI layer. * * LOCKING: * Inherited from PCI layer (may sleep). * * RETURNS: * Zero on success, or -ERRNO value. */ static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *id) { static const struct ata_port_info info = { .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, .udma_mask = ATA_UDMA5, .port_ops = &jmicron_ops, }; const struct ata_port_info *ppi[] = { &info, NULL }; return ata_pci_bmdma_init_one(pdev, ppi, &jmicron_sht, NULL, 0); } static const struct pci_device_id jmicron_pci_tbl[] = { { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 }, { } /* terminate list */ }; static struct pci_driver jmicron_pci_driver = { .name = DRV_NAME, .id_table = jmicron_pci_tbl, .probe = jmicron_init_one, .remove = ata_pci_remove_one, #ifdef CONFIG_PM_SLEEP .suspend = ata_pci_device_suspend, .resume = ata_pci_device_resume, #endif }; module_pci_driver(jmicron_pci_driver); MODULE_AUTHOR("Alan Cox"); MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl); MODULE_VERSION(DRV_VERSION); |