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_set_pio_mode(ide_drive_t *drive, const u8 pio)
88 ide_config_drive_speed(drive, XFER_PIO_0 + pio);
92 * jmicron_tune_chipset - set controller timings
93 * @drive: Drive to set up
94 * @speed: speed we want to achieve
96 * As the JMicron snoops for timings all we actually need to do is
97 * set the transfer mode on the device.
100 static int jmicron_tune_chipset(ide_drive_t *drive, const u8 speed)
102 return ide_config_drive_speed(drive, speed);
106 * jmicron_configure_drive_for_dma - set up for DMA transfers
107 * @drive: drive we are going to set up
109 * As the JMicron snoops for timings all we actually need to do is
110 * make sure we don't set an invalid mode.
113 static int jmicron_config_drive_for_dma (ide_drive_t *drive)
115 if (ide_tune_dma(drive))
118 ide_set_max_pio(drive);
124 * init_hwif_jmicron - set up hwif structs
125 * @hwif: interface to set up
127 * Minimal set up is required for the Jmicron hardware.
130 static void __devinit init_hwif_jmicron(ide_hwif_t *hwif)
132 hwif->speedproc = &jmicron_tune_chipset;
133 hwif->set_pio_mode = &jmicron_set_pio_mode;
135 hwif->drives[0].autotune = 1;
136 hwif->drives[1].autotune = 1;
142 hwif->ultra_mask = 0x7f;
143 hwif->mwdma_mask = 0x07;
145 hwif->ide_dma_check = &jmicron_config_drive_for_dma;
147 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
148 hwif->cbl = ata66_jmicron(hwif);
151 hwif->drives[0].autodma = hwif->autodma;
152 hwif->drives[1].autodma = hwif->autodma;
159 static ide_pci_device_t jmicron_chipset __devinitdata = {
161 .init_hwif = init_hwif_jmicron,
163 .bootable = ON_BOARD,
164 .enablebits = { { 0x40, 0x01, 0x01 }, { 0x40, 0x10, 0x10 } },
165 .pio_mask = ATA_PIO5,
169 * jmicron_init_one - pci layer discovery entry
171 * @id: ident table entry
173 * Called by the PCI code when it finds a Jmicron controller.
174 * We then use the IDE PCI generic helper to do most of the work.
177 static int __devinit jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id)
179 ide_setup_pci_device(dev, &jmicron_chipset);
183 /* All JMB PATA controllers have and will continue to have the same
184 * interface. Matching vendor and device class is enough for all
185 * current and future controllers if the controller is programmed
188 * If libata is configured, jmicron PCI quirk programs the controller
189 * into the correct mode. If libata isn't configured, match known
190 * device IDs too to maintain backward compatibility.
192 static struct pci_device_id jmicron_pci_tbl[] = {
193 #if !defined(CONFIG_ATA) && !defined(CONFIG_ATA_MODULE)
194 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB361) },
195 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB363) },
196 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB365) },
197 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB366) },
198 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB368) },
200 { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
201 PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },
205 MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
207 static struct pci_driver driver = {
208 .name = "JMicron IDE",
209 .id_table = jmicron_pci_tbl,
210 .probe = jmicron_init_one,
213 static int __init jmicron_ide_init(void)
215 return ide_pci_register_driver(&driver);
218 module_init(jmicron_ide_init);
220 MODULE_AUTHOR("Alan Cox");
221 MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes");
222 MODULE_LICENSE("GPL");