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/hdreg.h>
15 #include <linux/ide.h>
16 #include <linux/init.h>
18 static DEFINE_SPINLOCK(slc90e66_lock);
20 static void slc90e66_set_pio_mode(ide_drive_t *drive, const u8 pio)
22 ide_hwif_t *hwif = HWIF(drive);
23 struct pci_dev *dev = to_pci_dev(hwif->dev);
24 int is_slave = drive->dn & 1;
25 int master_port = hwif->channel ? 0x42 : 0x40;
26 int slave_port = 0x44;
32 static const u8 timings[][2] = {
39 spin_lock_irqsave(&slc90e66_lock, flags);
40 pci_read_config_word(dev, master_port, &master_data);
43 control |= 1; /* Programmable timing on */
44 if (drive->media == ide_disk)
45 control |= 4; /* Prefetch, post write */
47 control |= 2; /* IORDY */
49 master_data |= 0x4000;
50 master_data &= ~0x0070;
52 /* Set PPE, IE and TIME */
53 master_data |= control << 4;
55 pci_read_config_byte(dev, slave_port, &slave_data);
56 slave_data &= hwif->channel ? 0x0f : 0xf0;
57 slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) <<
58 (hwif->channel ? 4 : 0);
60 master_data &= ~0x3307;
62 /* enable PPE, IE and TIME */
63 master_data |= control;
65 master_data |= (timings[pio][0] << 12) | (timings[pio][1] << 8);
67 pci_write_config_word(dev, master_port, master_data);
69 pci_write_config_byte(dev, slave_port, slave_data);
70 spin_unlock_irqrestore(&slc90e66_lock, flags);
73 static void slc90e66_set_dma_mode(ide_drive_t *drive, const u8 speed)
75 ide_hwif_t *hwif = HWIF(drive);
76 struct pci_dev *dev = to_pci_dev(hwif->dev);
77 u8 maslave = hwif->channel ? 0x42 : 0x40;
78 int sitre = 0, a_speed = 7 << (drive->dn * 4);
79 int u_speed = 0, u_flag = 1 << drive->dn;
80 u16 reg4042, reg44, reg48, reg4a;
82 pci_read_config_word(dev, maslave, ®4042);
83 sitre = (reg4042 & 0x4000) ? 1 : 0;
84 pci_read_config_word(dev, 0x44, ®44);
85 pci_read_config_word(dev, 0x48, ®48);
86 pci_read_config_word(dev, 0x4a, ®4a);
88 if (speed >= XFER_UDMA_0) {
89 u_speed = (speed - XFER_UDMA_0) << (drive->dn * 4);
91 if (!(reg48 & u_flag))
92 pci_write_config_word(dev, 0x48, reg48|u_flag);
93 /* FIXME: (reg4a & a_speed) ? */
94 if ((reg4a & u_speed) != u_speed) {
95 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
96 pci_read_config_word(dev, 0x4a, ®4a);
97 pci_write_config_word(dev, 0x4a, reg4a|u_speed);
100 const u8 mwdma_to_pio[] = { 0, 3, 4 };
104 pci_write_config_word(dev, 0x48, reg48 & ~u_flag);
106 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
108 if (speed >= XFER_MW_DMA_0)
109 pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
111 pio = 2; /* only SWDMA2 is allowed */
113 slc90e66_set_pio_mode(drive, pio);
117 static u8 __devinit slc90e66_cable_detect(ide_hwif_t *hwif)
119 struct pci_dev *dev = to_pci_dev(hwif->dev);
120 u8 reg47 = 0, mask = hwif->channel ? 0x01 : 0x02;
122 pci_read_config_byte(dev, 0x47, ®47);
124 /* bit[0(1)]: 0:80, 1:40 */
125 return (reg47 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
128 static const struct ide_port_ops slc90e66_port_ops = {
129 .set_pio_mode = slc90e66_set_pio_mode,
130 .set_dma_mode = slc90e66_set_dma_mode,
131 .cable_detect = slc90e66_cable_detect,
134 static const struct ide_port_info slc90e66_chipset __devinitdata = {
136 .enablebits = { {0x41, 0x80, 0x80}, {0x43, 0x80, 0x80} },
137 .port_ops = &slc90e66_port_ops,
138 .host_flags = IDE_HFLAG_LEGACY_IRQS,
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_setup_pci_device(dev, &slc90e66_chipset);
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 driver = {
157 .name = "SLC90e66_IDE",
158 .id_table = slc90e66_pci_tbl,
159 .probe = slc90e66_init_one,
162 static int __init slc90e66_ide_init(void)
164 return ide_pci_register_driver(&driver);
167 module_init(slc90e66_ide_init);
169 MODULE_AUTHOR("Andre Hedrick");
170 MODULE_DESCRIPTION("PCI driver module for SLC90E66 IDE");
171 MODULE_LICENSE("GPL");