2 * linux/drivers/ide/pci/slc90e66.c Version 0.18 Aug 9, 2007
4 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
5 * Copyright (C) 2006-2007 MontaVista Software, Inc. <source@mvista.com>
7 * This is a look-alike variation of the ICH0 PIIX4 Ultra-66,
8 * but this keeps the ISA-Bridge and slots alive.
12 #include <linux/types.h>
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/ioport.h>
16 #include <linux/pci.h>
17 #include <linux/hdreg.h>
18 #include <linux/ide.h>
19 #include <linux/delay.h>
20 #include <linux/init.h>
24 static void slc90e66_set_pio_mode(ide_drive_t *drive, const u8 pio)
26 ide_hwif_t *hwif = HWIF(drive);
27 struct pci_dev *dev = hwif->pci_dev;
28 int is_slave = drive->dn & 1;
29 int master_port = hwif->channel ? 0x42 : 0x40;
30 int slave_port = 0x44;
36 static const u8 timings[][2]= {
43 spin_lock_irqsave(&ide_lock, flags);
44 pci_read_config_word(dev, master_port, &master_data);
47 control |= 1; /* Programmable timing on */
48 if (drive->media == ide_disk)
49 control |= 4; /* Prefetch, post write */
51 control |= 2; /* IORDY */
53 master_data |= 0x4000;
54 master_data &= ~0x0070;
56 /* Set PPE, IE and TIME */
57 master_data |= control << 4;
59 pci_read_config_byte(dev, slave_port, &slave_data);
60 slave_data &= hwif->channel ? 0x0f : 0xf0;
61 slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) <<
62 (hwif->channel ? 4 : 0);
64 master_data &= ~0x3307;
66 /* enable PPE, IE and TIME */
67 master_data |= control;
69 master_data |= (timings[pio][0] << 12) | (timings[pio][1] << 8);
71 pci_write_config_word(dev, master_port, master_data);
73 pci_write_config_byte(dev, slave_port, slave_data);
74 spin_unlock_irqrestore(&ide_lock, flags);
77 static void slc90e66_set_dma_mode(ide_drive_t *drive, const u8 speed)
79 ide_hwif_t *hwif = HWIF(drive);
80 struct pci_dev *dev = hwif->pci_dev;
81 u8 maslave = hwif->channel ? 0x42 : 0x40;
82 int sitre = 0, a_speed = 7 << (drive->dn * 4);
83 int u_speed = 0, u_flag = 1 << drive->dn;
84 u16 reg4042, reg44, reg48, reg4a;
86 pci_read_config_word(dev, maslave, ®4042);
87 sitre = (reg4042 & 0x4000) ? 1 : 0;
88 pci_read_config_word(dev, 0x44, ®44);
89 pci_read_config_word(dev, 0x48, ®48);
90 pci_read_config_word(dev, 0x4a, ®4a);
93 case XFER_UDMA_4: u_speed = 4 << (drive->dn * 4); break;
94 case XFER_UDMA_3: u_speed = 3 << (drive->dn * 4); break;
95 case XFER_UDMA_2: u_speed = 2 << (drive->dn * 4); break;
96 case XFER_UDMA_1: u_speed = 1 << (drive->dn * 4); break;
97 case XFER_UDMA_0: u_speed = 0 << (drive->dn * 4); break;
100 case XFER_SW_DMA_2: break;
104 if (speed >= XFER_UDMA_0) {
105 if (!(reg48 & u_flag))
106 pci_write_config_word(dev, 0x48, reg48|u_flag);
107 /* FIXME: (reg4a & a_speed) ? */
108 if ((reg4a & u_speed) != u_speed) {
109 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
110 pci_read_config_word(dev, 0x4a, ®4a);
111 pci_write_config_word(dev, 0x4a, reg4a|u_speed);
114 const u8 mwdma_to_pio[] = { 0, 3, 4 };
118 pci_write_config_word(dev, 0x48, reg48 & ~u_flag);
120 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
122 if (speed >= XFER_MW_DMA_0)
123 pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
125 pio = 2; /* only SWDMA2 is allowed */
127 slc90e66_set_pio_mode(drive, pio);
131 static void __devinit init_hwif_slc90e66 (ide_hwif_t *hwif)
134 u8 mask = hwif->channel ? 0x01 : 0x02; /* bit0:Primary */
137 hwif->irq = hwif->channel ? 15 : 14;
139 hwif->set_pio_mode = &slc90e66_set_pio_mode;
140 hwif->set_dma_mode = &slc90e66_set_dma_mode;
142 pci_read_config_byte(hwif->pci_dev, 0x47, ®47);
144 hwif->drives[0].autotune = 1;
145 hwif->drives[1].autotune = 1;
147 if (hwif->dma_base == 0)
150 hwif->ultra_mask = 0x1f;
151 hwif->mwdma_mask = 0x06;
152 hwif->swdma_mask = 0x04;
154 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
155 /* bit[0(1)]: 0:80, 1:40 */
156 hwif->cbl = (reg47 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
159 static ide_pci_device_t slc90e66_chipset __devinitdata = {
161 .init_hwif = init_hwif_slc90e66,
163 .enablebits = {{0x41,0x80,0x80}, {0x43,0x80,0x80}},
164 .bootable = ON_BOARD,
165 .pio_mask = ATA_PIO4,
168 static int __devinit slc90e66_init_one(struct pci_dev *dev, const struct pci_device_id *id)
170 return ide_setup_pci_device(dev, &slc90e66_chipset);
173 static const struct pci_device_id slc90e66_pci_tbl[] = {
174 { PCI_VDEVICE(EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1), 0 },
177 MODULE_DEVICE_TABLE(pci, slc90e66_pci_tbl);
179 static struct pci_driver driver = {
180 .name = "SLC90e66_IDE",
181 .id_table = slc90e66_pci_tbl,
182 .probe = slc90e66_init_one,
185 static int __init slc90e66_ide_init(void)
187 return ide_pci_register_driver(&driver);
190 module_init(slc90e66_ide_init);
192 MODULE_AUTHOR("Andre Hedrick");
193 MODULE_DESCRIPTION("PCI driver module for SLC90E66 IDE");
194 MODULE_LICENSE("GPL");