2 * linux/drivers/ide/pci/slc90e66.c Version 0.19 Sep 24, 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 DEFINE_SPINLOCK(slc90e66_lock);
26 static void slc90e66_set_pio_mode(ide_drive_t *drive, const u8 pio)
28 ide_hwif_t *hwif = HWIF(drive);
29 struct pci_dev *dev = hwif->pci_dev;
30 int is_slave = drive->dn & 1;
31 int master_port = hwif->channel ? 0x42 : 0x40;
32 int slave_port = 0x44;
38 static const u8 timings[][2]= {
45 spin_lock_irqsave(&slc90e66_lock, flags);
46 pci_read_config_word(dev, master_port, &master_data);
49 control |= 1; /* Programmable timing on */
50 if (drive->media == ide_disk)
51 control |= 4; /* Prefetch, post write */
53 control |= 2; /* IORDY */
55 master_data |= 0x4000;
56 master_data &= ~0x0070;
58 /* Set PPE, IE and TIME */
59 master_data |= control << 4;
61 pci_read_config_byte(dev, slave_port, &slave_data);
62 slave_data &= hwif->channel ? 0x0f : 0xf0;
63 slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) <<
64 (hwif->channel ? 4 : 0);
66 master_data &= ~0x3307;
68 /* enable PPE, IE and TIME */
69 master_data |= control;
71 master_data |= (timings[pio][0] << 12) | (timings[pio][1] << 8);
73 pci_write_config_word(dev, master_port, master_data);
75 pci_write_config_byte(dev, slave_port, slave_data);
76 spin_unlock_irqrestore(&slc90e66_lock, flags);
79 static void slc90e66_set_dma_mode(ide_drive_t *drive, const u8 speed)
81 ide_hwif_t *hwif = HWIF(drive);
82 struct pci_dev *dev = hwif->pci_dev;
83 u8 maslave = hwif->channel ? 0x42 : 0x40;
84 int sitre = 0, a_speed = 7 << (drive->dn * 4);
85 int u_speed = 0, u_flag = 1 << drive->dn;
86 u16 reg4042, reg44, reg48, reg4a;
88 pci_read_config_word(dev, maslave, ®4042);
89 sitre = (reg4042 & 0x4000) ? 1 : 0;
90 pci_read_config_word(dev, 0x44, ®44);
91 pci_read_config_word(dev, 0x48, ®48);
92 pci_read_config_word(dev, 0x4a, ®4a);
95 case XFER_UDMA_4: u_speed = 4 << (drive->dn * 4); break;
96 case XFER_UDMA_3: u_speed = 3 << (drive->dn * 4); break;
97 case XFER_UDMA_2: u_speed = 2 << (drive->dn * 4); break;
98 case XFER_UDMA_1: u_speed = 1 << (drive->dn * 4); break;
99 case XFER_UDMA_0: u_speed = 0 << (drive->dn * 4); break;
102 case XFER_SW_DMA_2: break;
106 if (speed >= XFER_UDMA_0) {
107 if (!(reg48 & u_flag))
108 pci_write_config_word(dev, 0x48, reg48|u_flag);
109 /* FIXME: (reg4a & a_speed) ? */
110 if ((reg4a & u_speed) != u_speed) {
111 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
112 pci_read_config_word(dev, 0x4a, ®4a);
113 pci_write_config_word(dev, 0x4a, reg4a|u_speed);
116 const u8 mwdma_to_pio[] = { 0, 3, 4 };
120 pci_write_config_word(dev, 0x48, reg48 & ~u_flag);
122 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
124 if (speed >= XFER_MW_DMA_0)
125 pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
127 pio = 2; /* only SWDMA2 is allowed */
129 slc90e66_set_pio_mode(drive, pio);
133 static void __devinit init_hwif_slc90e66 (ide_hwif_t *hwif)
136 u8 mask = hwif->channel ? 0x01 : 0x02; /* bit0:Primary */
138 hwif->set_pio_mode = &slc90e66_set_pio_mode;
139 hwif->set_dma_mode = &slc90e66_set_dma_mode;
141 pci_read_config_byte(hwif->pci_dev, 0x47, ®47);
143 if (hwif->dma_base == 0)
146 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
147 /* bit[0(1)]: 0:80, 1:40 */
148 hwif->cbl = (reg47 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
151 static const struct ide_port_info slc90e66_chipset __devinitdata = {
153 .init_hwif = init_hwif_slc90e66,
154 .enablebits = {{0x41,0x80,0x80}, {0x43,0x80,0x80}},
155 .host_flags = IDE_HFLAG_LEGACY_IRQS | IDE_HFLAG_BOOTABLE,
156 .pio_mask = ATA_PIO4,
157 .swdma_mask = ATA_SWDMA2_ONLY,
158 .mwdma_mask = ATA_MWDMA12_ONLY,
159 .udma_mask = ATA_UDMA4,
162 static int __devinit slc90e66_init_one(struct pci_dev *dev, const struct pci_device_id *id)
164 return ide_setup_pci_device(dev, &slc90e66_chipset);
167 static const struct pci_device_id slc90e66_pci_tbl[] = {
168 { PCI_VDEVICE(EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1), 0 },
171 MODULE_DEVICE_TABLE(pci, slc90e66_pci_tbl);
173 static struct pci_driver driver = {
174 .name = "SLC90e66_IDE",
175 .id_table = slc90e66_pci_tbl,
176 .probe = slc90e66_init_one,
179 static int __init slc90e66_ide_init(void)
181 return ide_pci_register_driver(&driver);
184 module_init(slc90e66_ide_init);
186 MODULE_AUTHOR("Andre Hedrick");
187 MODULE_DESCRIPTION("PCI driver module for SLC90E66 IDE");
188 MODULE_LICENSE("GPL");