1 /* 2 * pata_jmicron.c - JMicron ATA driver for non AHCI mode. This drives the 3 * PATA port of the controller. The SATA ports are 4 * driven by AHCI in the usual configuration although 5 * this driver can handle other setups if we need it. 6 * 7 * (c) 2006 Red Hat 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/pci.h> 13 #include <linux/blkdev.h> 14 #include <linux/delay.h> 15 #include <linux/device.h> 16 #include <scsi/scsi_host.h> 17 #include <linux/libata.h> 18 #include <linux/ata.h> 19 20 #define DRV_NAME "pata_jmicron" 21 #define DRV_VERSION "0.1.5" 22 23 typedef enum { 24 PORT_PATA0 = 0, 25 PORT_PATA1 = 1, 26 PORT_SATA = 2, 27 } port_type; 28 29 /** 30 * jmicron_pre_reset - check for 40/80 pin 31 * @link: ATA link 32 * @deadline: deadline jiffies for the operation 33 * 34 * Perform the PATA port setup we need. 35 * 36 * On the Jmicron 361/363 there is a single PATA port that can be mapped 37 * either as primary or secondary (or neither). We don't do any policy 38 * and setup here. We assume that has been done by init_one and the 39 * BIOS. 40 */ 41 static int jmicron_pre_reset(struct ata_link *link, unsigned long deadline) 42 { 43 struct ata_port *ap = link->ap; 44 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 45 u32 control; 46 u32 control5; 47 int port_mask = 1<< (4 * ap->port_no); 48 int port = ap->port_no; 49 port_type port_map[2]; 50 51 /* Check if our port is enabled */ 52 pci_read_config_dword(pdev, 0x40, &control); 53 if ((control & port_mask) == 0) 54 return -ENOENT; 55 56 /* There are two basic mappings. One has the two SATA ports merged 57 as master/slave and the secondary as PATA, the other has only the 58 SATA port mapped */ 59 if (control & (1 << 23)) { 60 port_map[0] = PORT_SATA; 61 port_map[1] = PORT_PATA0; 62 } else { 63 port_map[0] = PORT_SATA; 64 port_map[1] = PORT_SATA; 65 } 66 67 /* The 365/366 may have this bit set to map the second PATA port 68 as the internal primary channel */ 69 pci_read_config_dword(pdev, 0x80, &control5); 70 if (control5 & (1<<24)) 71 port_map[0] = PORT_PATA1; 72 73 /* The two ports may then be logically swapped by the firmware */ 74 if (control & (1 << 22)) 75 port = port ^ 1; 76 77 /* 78 * Now we know which physical port we are talking about we can 79 * actually do our cable checking etc. Thankfully we don't need 80 * to do the plumbing for other cases. 81 */ 82 switch (port_map[port]) { 83 case PORT_PATA0: 84 if ((control & (1 << 5)) == 0) 85 return -ENOENT; 86 if (control & (1 << 3)) /* 40/80 pin primary */ 87 ap->cbl = ATA_CBL_PATA40; 88 else 89 ap->cbl = ATA_CBL_PATA80; 90 break; 91 case PORT_PATA1: 92 /* Bit 21 is set if the port is enabled */ 93 if ((control5 & (1 << 21)) == 0) 94 return -ENOENT; 95 if (control5 & (1 << 19)) /* 40/80 pin secondary */ 96 ap->cbl = ATA_CBL_PATA40; 97 else 98 ap->cbl = ATA_CBL_PATA80; 99 break; 100 case PORT_SATA: 101 ap->cbl = ATA_CBL_SATA; 102 break; 103 } 104 return ata_sff_prereset(link, deadline); 105 } 106 107 /* No PIO or DMA methods needed for this device */ 108 109 static struct scsi_host_template jmicron_sht = { 110 ATA_BMDMA_SHT(DRV_NAME), 111 }; 112 113 static struct ata_port_operations jmicron_ops = { 114 .inherits = &ata_bmdma_port_ops, 115 .prereset = jmicron_pre_reset, 116 }; 117 118 119 /** 120 * jmicron_init_one - Register Jmicron ATA PCI device with kernel services 121 * @pdev: PCI device to register 122 * @ent: Entry in jmicron_pci_tbl matching with @pdev 123 * 124 * Called from kernel PCI layer. 125 * 126 * LOCKING: 127 * Inherited from PCI layer (may sleep). 128 * 129 * RETURNS: 130 * Zero on success, or -ERRNO value. 131 */ 132 133 static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *id) 134 { 135 static const struct ata_port_info info = { 136 .flags = ATA_FLAG_SLAVE_POSS, 137 138 .pio_mask = ATA_PIO4, 139 .mwdma_mask = ATA_MWDMA2, 140 .udma_mask = ATA_UDMA5, 141 142 .port_ops = &jmicron_ops, 143 }; 144 const struct ata_port_info *ppi[] = { &info, NULL }; 145 146 /* 147 * The JMicron chip 361/363 contains one SATA controller and one 148 * PATA controller,for powering on these both controllers, we must 149 * follow the sequence one by one, otherwise one of them can not be 150 * powered on successfully, so here we disable the async suspend 151 * method for these chips. 152 */ 153 if (pdev->vendor == PCI_VENDOR_ID_JMICRON && 154 (pdev->device == PCI_DEVICE_ID_JMICRON_JMB363 || 155 pdev->device == PCI_DEVICE_ID_JMICRON_JMB361)) 156 device_disable_async_suspend(&pdev->dev); 157 158 return ata_pci_bmdma_init_one(pdev, ppi, &jmicron_sht, NULL, 0); 159 } 160 161 static const struct pci_device_id jmicron_pci_tbl[] = { 162 { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 163 PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 }, 164 { } /* terminate list */ 165 }; 166 167 static struct pci_driver jmicron_pci_driver = { 168 .name = DRV_NAME, 169 .id_table = jmicron_pci_tbl, 170 .probe = jmicron_init_one, 171 .remove = ata_pci_remove_one, 172 #ifdef CONFIG_PM_SLEEP 173 .suspend = ata_pci_device_suspend, 174 .resume = ata_pci_device_resume, 175 #endif 176 }; 177 178 module_pci_driver(jmicron_pci_driver); 179 180 MODULE_AUTHOR("Alan Cox"); 181 MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports"); 182 MODULE_LICENSE("GPL"); 183 MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl); 184 MODULE_VERSION(DRV_VERSION); 185 186