2 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
3 * Copyright (C) 2006-2007 MontaVista Software, Inc. <source@mvista.com>
5 * This is a look-alike variation of the ICH0 PIIX4 Ultra-66,
6 * but this keeps the ISA-Bridge and slots alive.
10 #include <linux/types.h>
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/pci.h>
14 #include <linux/ide.h>
15 #include <linux/init.h>
17 #define DRV_NAME "slc90e66"
19 static DEFINE_SPINLOCK(slc90e66_lock);
21 static void slc90e66_set_pio_mode(ide_drive_t *drive, const u8 pio)
23 ide_hwif_t *hwif = drive->hwif;
24 struct pci_dev *dev = to_pci_dev(hwif->dev);
25 int is_slave = drive->dn & 1;
26 int master_port = hwif->channel ? 0x42 : 0x40;
27 int slave_port = 0x44;
33 static const u8 timings[][2] = {
40 spin_lock_irqsave(&slc90e66_lock, flags);
41 pci_read_config_word(dev, master_port, &master_data);
44 control |= 1; /* Programmable timing on */
45 if (drive->media == ide_disk)
46 control |= 4; /* Prefetch, post write */
47 if (ide_pio_need_iordy(drive, pio))
48 control |= 2; /* IORDY */
50 master_data |= 0x4000;
51 master_data &= ~0x0070;
53 /* Set PPE, IE and TIME */
54 master_data |= control << 4;
56 pci_read_config_byte(dev, slave_port, &slave_data);
57 slave_data &= hwif->channel ? 0x0f : 0xf0;
58 slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) <<
59 (hwif->channel ? 4 : 0);
61 master_data &= ~0x3307;
63 /* enable PPE, IE and TIME */
64 master_data |= control;
66 master_data |= (timings[pio][0] << 12) | (timings[pio][1] << 8);
68 pci_write_config_word(dev, master_port, master_data);
70 pci_write_config_byte(dev, slave_port, slave_data);
71 spin_unlock_irqrestore(&slc90e66_lock, flags);
74 static void slc90e66_set_dma_mode(ide_drive_t *drive, const u8 speed)
76 ide_hwif_t *hwif = drive->hwif;
77 struct pci_dev *dev = to_pci_dev(hwif->dev);
78 u8 maslave = hwif->channel ? 0x42 : 0x40;
79 int sitre = 0, a_speed = 7 << (drive->dn * 4);
80 int u_speed = 0, u_flag = 1 << drive->dn;
81 u16 reg4042, reg44, reg48, reg4a;
83 pci_read_config_word(dev, maslave, ®4042);
84 sitre = (reg4042 & 0x4000) ? 1 : 0;
85 pci_read_config_word(dev, 0x44, ®44);
86 pci_read_config_word(dev, 0x48, ®48);
87 pci_read_config_word(dev, 0x4a, ®4a);
89 if (speed >= XFER_UDMA_0) {
90 u_speed = (speed - XFER_UDMA_0) << (drive->dn * 4);
92 if (!(reg48 & u_flag))
93 pci_write_config_word(dev, 0x48, reg48|u_flag);
94 /* FIXME: (reg4a & a_speed) ? */
95 if ((reg4a & u_speed) != u_speed) {
96 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
97 pci_read_config_word(dev, 0x4a, ®4a);
98 pci_write_config_word(dev, 0x4a, reg4a|u_speed);
101 const u8 mwdma_to_pio[] = { 0, 3, 4 };
105 pci_write_config_word(dev, 0x48, reg48 & ~u_flag);
107 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
109 if (speed >= XFER_MW_DMA_0)
110 pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
112 pio = 2; /* only SWDMA2 is allowed */
114 slc90e66_set_pio_mode(drive, pio);
118 static u8 slc90e66_cable_detect(ide_hwif_t *hwif)
120 struct pci_dev *dev = to_pci_dev(hwif->dev);
121 u8 reg47 = 0, mask = hwif->channel ? 0x01 : 0x02;
123 pci_read_config_byte(dev, 0x47, ®47);
125 /* bit[0(1)]: 0:80, 1:40 */
126 return (reg47 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
129 static const struct ide_port_ops slc90e66_port_ops = {
130 .set_pio_mode = slc90e66_set_pio_mode,
131 .set_dma_mode = slc90e66_set_dma_mode,
132 .cable_detect = slc90e66_cable_detect,
135 static const struct ide_port_info slc90e66_chipset __devinitdata = {
137 .enablebits = { {0x41, 0x80, 0x80}, {0x43, 0x80, 0x80} },
138 .port_ops = &slc90e66_port_ops,
139 .pio_mask = ATA_PIO4,
140 .swdma_mask = ATA_SWDMA2_ONLY,
141 .mwdma_mask = ATA_MWDMA12_ONLY,
142 .udma_mask = ATA_UDMA4,
145 static int __devinit slc90e66_init_one(struct pci_dev *dev, const struct pci_device_id *id)
147 return ide_pci_init_one(dev, &slc90e66_chipset, NULL);
150 static const struct pci_device_id slc90e66_pci_tbl[] = {
151 { PCI_VDEVICE(EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1), 0 },
154 MODULE_DEVICE_TABLE(pci, slc90e66_pci_tbl);
156 static struct pci_driver slc90e66_pci_driver = {
157 .name = "SLC90e66_IDE",
158 .id_table = slc90e66_pci_tbl,
159 .probe = slc90e66_init_one,
160 .remove = ide_pci_remove,
161 .suspend = ide_pci_suspend,
162 .resume = ide_pci_resume,
165 static int __init slc90e66_ide_init(void)
167 return ide_pci_register_driver(&slc90e66_pci_driver);
170 static void __exit slc90e66_ide_exit(void)
172 pci_unregister_driver(&slc90e66_pci_driver);
175 module_init(slc90e66_ide_init);
176 module_exit(slc90e66_ide_exit);
178 MODULE_AUTHOR("Andre Hedrick");
179 MODULE_DESCRIPTION("PCI driver module for SLC90E66 IDE");
180 MODULE_LICENSE("GPL");