3 * Copyright (C) 2006 Red Hat <alan@redhat.com>
5 * May be copied or modified under the terms of the GNU General Public License
8 #include <linux/types.h>
9 #include <linux/module.h>
10 #include <linux/pci.h>
11 #include <linux/delay.h>
12 #include <linux/hdreg.h>
13 #include <linux/ide.h>
14 #include <linux/init.h>
25 * ata66_jmicron - Cable check
28 * Returns the cable type.
31 static u8 __devinit ata66_jmicron(ide_hwif_t *hwif)
33 struct pci_dev *pdev = hwif->pci_dev;
38 int port = hwif->channel;
39 port_type port_map[2];
41 pci_read_config_dword(pdev, 0x40, &control);
43 /* There are two basic mappings. One has the two SATA ports merged
44 as master/slave and the secondary as PATA, the other has only the
46 if (control & (1 << 23)) {
47 port_map[0] = PORT_SATA;
48 port_map[1] = PORT_PATA0;
50 port_map[0] = PORT_SATA;
51 port_map[1] = PORT_SATA;
54 /* The 365/366 may have this bit set to map the second PATA port
55 as the internal primary channel */
56 pci_read_config_dword(pdev, 0x80, &control5);
57 if (control5 & (1<<24))
58 port_map[0] = PORT_PATA1;
60 /* The two ports may then be logically swapped by the firmware */
61 if (control & (1 << 22))
65 * Now we know which physical port we are talking about we can
66 * actually do our cable checking etc. Thankfully we don't need
67 * to do the plumbing for other cases.
69 switch (port_map[port])
72 if (control & (1 << 3)) /* 40/80 pin primary */
73 return ATA_CBL_PATA40;
74 return ATA_CBL_PATA80;
76 if (control5 & (1 << 19)) /* 40/80 pin secondary */
77 return ATA_CBL_PATA40;
78 return ATA_CBL_PATA80;
82 /* Avoid bogus "control reaches end of non-void function" */
83 return ATA_CBL_PATA80;
86 static void jmicron_tuneproc(ide_drive_t *drive, u8 pio)
88 pio = ide_get_best_pio_mode(drive, pio, 5);
89 ide_config_drive_speed(drive, XFER_PIO_0 + pio);
93 * jmicron_tune_chipset - set controller timings
94 * @drive: Drive to set up
95 * @xferspeed: speed we want to achieve
97 * As the JMicron snoops for timings all we actually need to do is
98 * make sure we don't set an invalid mode. We do need to honour
99 * the cable detect here.
102 static int jmicron_tune_chipset (ide_drive_t *drive, byte xferspeed)
104 u8 speed = ide_rate_filter(drive, xferspeed);
106 return ide_config_drive_speed(drive, speed);
110 * jmicron_configure_drive_for_dma - set up for DMA transfers
111 * @drive: drive we are going to set up
113 * As the JMicron snoops for timings all we actually need to do is
114 * make sure we don't set an invalid mode.
117 static int jmicron_config_drive_for_dma (ide_drive_t *drive)
119 if (ide_tune_dma(drive))
122 jmicron_tuneproc(drive, 255);
128 * init_hwif_jmicron - set up hwif structs
129 * @hwif: interface to set up
131 * Minimal set up is required for the Jmicron hardware.
134 static void __devinit init_hwif_jmicron(ide_hwif_t *hwif)
136 hwif->speedproc = &jmicron_tune_chipset;
137 hwif->tuneproc = &jmicron_tuneproc;
139 hwif->drives[0].autotune = 1;
140 hwif->drives[1].autotune = 1;
146 hwif->ultra_mask = 0x7f;
147 hwif->mwdma_mask = 0x07;
149 hwif->ide_dma_check = &jmicron_config_drive_for_dma;
151 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
152 hwif->cbl = ata66_jmicron(hwif);
155 hwif->drives[0].autodma = hwif->autodma;
156 hwif->drives[1].autodma = hwif->autodma;
163 static ide_pci_device_t jmicron_chipset __devinitdata = {
165 .init_hwif = init_hwif_jmicron,
167 .bootable = ON_BOARD,
168 .enablebits = { { 0x40, 0x01, 0x01 }, { 0x40, 0x10, 0x10 } },
169 .pio_mask = ATA_PIO5,
173 * jmicron_init_one - pci layer discovery entry
175 * @id: ident table entry
177 * Called by the PCI code when it finds a Jmicron controller.
178 * We then use the IDE PCI generic helper to do most of the work.
181 static int __devinit jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id)
183 ide_setup_pci_device(dev, &jmicron_chipset);
187 /* All JMB PATA controllers have and will continue to have the same
188 * interface. Matching vendor and device class is enough for all
189 * current and future controllers if the controller is programmed
192 * If libata is configured, jmicron PCI quirk programs the controller
193 * into the correct mode. If libata isn't configured, match known
194 * device IDs too to maintain backward compatibility.
196 static struct pci_device_id jmicron_pci_tbl[] = {
197 #if !defined(CONFIG_ATA) && !defined(CONFIG_ATA_MODULE)
198 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB361) },
199 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB363) },
200 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB365) },
201 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB366) },
202 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB368) },
204 { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
205 PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },
209 MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
211 static struct pci_driver driver = {
212 .name = "JMicron IDE",
213 .id_table = jmicron_pci_tbl,
214 .probe = jmicron_init_one,
217 static int __init jmicron_ide_init(void)
219 return ide_pci_register_driver(&driver);
222 module_init(jmicron_ide_init);
224 MODULE_AUTHOR("Alan Cox");
225 MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes");
226 MODULE_LICENSE("GPL");