1 2/* 3 * Copyright (C) 2006 Red Hat 4 * 5 * May be copied or modified under the terms of the GNU General Public License 6 */ 7 8#include <linux/types.h> 9#include <linux/module.h> 10#include <linux/pci.h> 11#include <linux/ide.h> 12#include <linux/init.h> 13 14#define DRV_NAME "jmicron" 15 16typedef enum { 17 PORT_PATA0 = 0, 18 PORT_PATA1 = 1, 19 PORT_SATA = 2, 20} port_type; 21 22/** 23 * jmicron_cable_detect - cable detection 24 * @hwif: IDE port 25 * 26 * Returns the cable type. 27 */ 28 29static u8 jmicron_cable_detect(ide_hwif_t *hwif) 30{ 31 struct pci_dev *pdev = to_pci_dev(hwif->dev); 32 33 u32 control; 34 u32 control5; 35 36 int port = hwif->channel; 37 port_type port_map[2]; 38 39 pci_read_config_dword(pdev, 0x40, &control); 40 41 /* There are two basic mappings. One has the two SATA ports merged 42 as master/slave and the secondary as PATA, the other has only the 43 SATA port mapped */ 44 if (control & (1 << 23)) { 45 port_map[0] = PORT_SATA; 46 port_map[1] = PORT_PATA0; 47 } else { 48 port_map[0] = PORT_SATA; 49 port_map[1] = PORT_SATA; 50 } 51 52 /* The 365/366 may have this bit set to map the second PATA port 53 as the internal primary channel */ 54 pci_read_config_dword(pdev, 0x80, &control5); 55 if (control5 & (1<<24)) 56 port_map[0] = PORT_PATA1; 57 58 /* The two ports may then be logically swapped by the firmware */ 59 if (control & (1 << 22)) 60 port = port ^ 1; 61 62 /* 63 * Now we know which physical port we are talking about we can 64 * actually do our cable checking etc. Thankfully we don't need 65 * to do the plumbing for other cases. 66 */ 67 switch (port_map[port]) { 68 case PORT_PATA0: 69 if (control & (1 << 3)) /* 40/80 pin primary */ 70 return ATA_CBL_PATA40; 71 return ATA_CBL_PATA80; 72 case PORT_PATA1: 73 if (control5 & (1 << 19)) /* 40/80 pin secondary */ 74 return ATA_CBL_PATA40; 75 return ATA_CBL_PATA80; 76 case PORT_SATA: 77 break; 78 } 79 /* Avoid bogus "control reaches end of non-void function" */ 80 return ATA_CBL_PATA80; 81} 82 83static void jmicron_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive) 84{ 85} 86 87/** 88 * jmicron_set_dma_mode - set host controller for DMA mode 89 * @hwif: port 90 * @drive: drive 91 * 92 * As the JMicron snoops for timings we don't need to do anything here. 93 */ 94 95static void jmicron_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive) 96{ 97} 98 99static const struct ide_port_ops jmicron_port_ops = { 100 .set_pio_mode = jmicron_set_pio_mode, 101 .set_dma_mode = jmicron_set_dma_mode, 102 .cable_detect = jmicron_cable_detect, 103}; 104 105static const struct ide_port_info jmicron_chipset = { 106 .name = DRV_NAME, 107 .enablebits = { { 0x40, 0x01, 0x01 }, { 0x40, 0x10, 0x10 } }, 108 .port_ops = &jmicron_port_ops, 109 .pio_mask = ATA_PIO5, 110 .mwdma_mask = ATA_MWDMA2, 111 .udma_mask = ATA_UDMA6, 112}; 113 114/** 115 * jmicron_init_one - pci layer discovery entry 116 * @dev: PCI device 117 * @id: ident table entry 118 * 119 * Called by the PCI code when it finds a Jmicron controller. 120 * We then use the IDE PCI generic helper to do most of the work. 121 */ 122 123static int jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id) 124{ 125 return ide_pci_init_one(dev, &jmicron_chipset, NULL); 126} 127 128/* All JMB PATA controllers have and will continue to have the same 129 * interface. Matching vendor and device class is enough for all 130 * current and future controllers if the controller is programmed 131 * properly. 132 * 133 * If libata is configured, jmicron PCI quirk programs the controller 134 * into the correct mode. If libata isn't configured, match known 135 * device IDs too to maintain backward compatibility. 136 */ 137static struct pci_device_id jmicron_pci_tbl[] = { 138#if !defined(CONFIG_ATA) && !defined(CONFIG_ATA_MODULE) 139 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB361) }, 140 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB363) }, 141 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB365) }, 142 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB366) }, 143 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB368) }, 144#endif 145 { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 146 PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 }, 147 { 0, }, 148}; 149 150MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl); 151 152static struct pci_driver jmicron_pci_driver = { 153 .name = "JMicron IDE", 154 .id_table = jmicron_pci_tbl, 155 .probe = jmicron_init_one, 156 .remove = ide_pci_remove, 157 .suspend = ide_pci_suspend, 158 .resume = ide_pci_resume, 159}; 160 161static int __init jmicron_ide_init(void) 162{ 163 return ide_pci_register_driver(&jmicron_pci_driver); 164} 165 166static void __exit jmicron_ide_exit(void) 167{ 168 pci_unregister_driver(&jmicron_pci_driver); 169} 170 171module_init(jmicron_ide_init); 172module_exit(jmicron_ide_exit); 173 174MODULE_AUTHOR("Alan Cox"); 175MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes"); 176MODULE_LICENSE("GPL"); 177