1 /*
2 * Copyright (C) 2003 ATI Inc. <hyu@ati.com>
3 * Copyright (C) 2004,2007 Bartlomiej Zolnierkiewicz
4 */
5
6 #include <linux/types.h>
7 #include <linux/module.h>
8 #include <linux/kernel.h>
9 #include <linux/pci.h>
10 #include <linux/ide.h>
11 #include <linux/init.h>
12
13 #define DRV_NAME "atiixp"
14
15 #define ATIIXP_IDE_PIO_TIMING 0x40
16 #define ATIIXP_IDE_MDMA_TIMING 0x44
17 #define ATIIXP_IDE_PIO_CONTROL 0x48
18 #define ATIIXP_IDE_PIO_MODE 0x4a
19 #define ATIIXP_IDE_UDMA_CONTROL 0x54
20 #define ATIIXP_IDE_UDMA_MODE 0x56
21
22 typedef struct {
23 u8 command_width;
24 u8 recover_width;
25 } atiixp_ide_timing;
26
27 static atiixp_ide_timing pio_timing[] = {
28 { 0x05, 0x0d },
29 { 0x04, 0x07 },
30 { 0x03, 0x04 },
31 { 0x02, 0x02 },
32 { 0x02, 0x00 },
33 };
34
35 static atiixp_ide_timing mdma_timing[] = {
36 { 0x07, 0x07 },
37 { 0x02, 0x01 },
38 { 0x02, 0x00 },
39 };
40
41 static DEFINE_SPINLOCK(atiixp_lock);
42
43 /**
44 * atiixp_set_pio_mode - set host controller for PIO mode
45 * @drive: drive
46 * @pio: PIO mode number
47 *
48 * Set the interface PIO mode.
49 */
50
atiixp_set_pio_mode(ide_drive_t * drive,const u8 pio)51 static void atiixp_set_pio_mode(ide_drive_t *drive, const u8 pio)
52 {
53 struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
54 unsigned long flags;
55 int timing_shift = (drive->dn ^ 1) * 8;
56 u32 pio_timing_data;
57 u16 pio_mode_data;
58
59 spin_lock_irqsave(&atiixp_lock, flags);
60
61 pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
62 pio_mode_data &= ~(0x07 << (drive->dn * 4));
63 pio_mode_data |= (pio << (drive->dn * 4));
64 pci_write_config_word(dev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
65
66 pci_read_config_dword(dev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
67 pio_timing_data &= ~(0xff << timing_shift);
68 pio_timing_data |= (pio_timing[pio].recover_width << timing_shift) |
69 (pio_timing[pio].command_width << (timing_shift + 4));
70 pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
71
72 spin_unlock_irqrestore(&atiixp_lock, flags);
73 }
74
75 /**
76 * atiixp_set_dma_mode - set host controller for DMA mode
77 * @drive: drive
78 * @speed: DMA mode
79 *
80 * Set a ATIIXP host controller to the desired DMA mode. This involves
81 * programming the right timing data into the PCI configuration space.
82 */
83
atiixp_set_dma_mode(ide_drive_t * drive,const u8 speed)84 static void atiixp_set_dma_mode(ide_drive_t *drive, const u8 speed)
85 {
86 struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
87 unsigned long flags;
88 int timing_shift = (drive->dn ^ 1) * 8;
89 u32 tmp32;
90 u16 tmp16;
91 u16 udma_ctl = 0;
92
93 spin_lock_irqsave(&atiixp_lock, flags);
94
95 pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &udma_ctl);
96
97 if (speed >= XFER_UDMA_0) {
98 pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &tmp16);
99 tmp16 &= ~(0x07 << (drive->dn * 4));
100 tmp16 |= ((speed & 0x07) << (drive->dn * 4));
101 pci_write_config_word(dev, ATIIXP_IDE_UDMA_MODE, tmp16);
102
103 udma_ctl |= (1 << drive->dn);
104 } else if (speed >= XFER_MW_DMA_0) {
105 u8 i = speed & 0x03;
106
107 pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &tmp32);
108 tmp32 &= ~(0xff << timing_shift);
109 tmp32 |= (mdma_timing[i].recover_width << timing_shift) |
110 (mdma_timing[i].command_width << (timing_shift + 4));
111 pci_write_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, tmp32);
112
113 udma_ctl &= ~(1 << drive->dn);
114 }
115
116 pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, udma_ctl);
117
118 spin_unlock_irqrestore(&atiixp_lock, flags);
119 }
120
atiixp_cable_detect(ide_hwif_t * hwif)121 static u8 atiixp_cable_detect(ide_hwif_t *hwif)
122 {
123 struct pci_dev *pdev = to_pci_dev(hwif->dev);
124 u8 udma_mode = 0, ch = hwif->channel;
125
126 pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ch, &udma_mode);
127
128 if ((udma_mode & 0x07) >= 0x04 || (udma_mode & 0x70) >= 0x40)
129 return ATA_CBL_PATA80;
130 else
131 return ATA_CBL_PATA40;
132 }
133
134 static const struct ide_port_ops atiixp_port_ops = {
135 .set_pio_mode = atiixp_set_pio_mode,
136 .set_dma_mode = atiixp_set_dma_mode,
137 .cable_detect = atiixp_cable_detect,
138 };
139
140 static const struct ide_port_info atiixp_pci_info[] __devinitdata = {
141 { /* 0: IXP200/300/400/700 */
142 .name = DRV_NAME,
143 .enablebits = {{0x48,0x01,0x00}, {0x48,0x08,0x00}},
144 .port_ops = &atiixp_port_ops,
145 .host_flags = IDE_HFLAG_LEGACY_IRQS,
146 .pio_mask = ATA_PIO4,
147 .mwdma_mask = ATA_MWDMA2,
148 .udma_mask = ATA_UDMA5,
149 },
150 { /* 1: IXP600 */
151 .name = DRV_NAME,
152 .enablebits = {{0x48,0x01,0x00}, {0x00,0x00,0x00}},
153 .port_ops = &atiixp_port_ops,
154 .host_flags = IDE_HFLAG_SINGLE | IDE_HFLAG_LEGACY_IRQS,
155 .pio_mask = ATA_PIO4,
156 .mwdma_mask = ATA_MWDMA2,
157 .udma_mask = ATA_UDMA5,
158 },
159 };
160
161 /**
162 * atiixp_init_one - called when a ATIIXP is found
163 * @dev: the atiixp device
164 * @id: the matching pci id
165 *
166 * Called when the PCI registration layer (or the IDE initialization)
167 * finds a device matching our IDE device tables.
168 */
169
atiixp_init_one(struct pci_dev * dev,const struct pci_device_id * id)170 static int __devinit atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
171 {
172 return ide_pci_init_one(dev, &atiixp_pci_info[id->driver_data], NULL);
173 }
174
175 static const struct pci_device_id atiixp_pci_tbl[] = {
176 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), 0 },
177 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), 0 },
178 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), 0 },
179 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), 1 },
180 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP700_IDE), 0 },
181 { 0, },
182 };
183 MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl);
184
185 static struct pci_driver atiixp_pci_driver = {
186 .name = "ATIIXP_IDE",
187 .id_table = atiixp_pci_tbl,
188 .probe = atiixp_init_one,
189 .remove = ide_pci_remove,
190 .suspend = ide_pci_suspend,
191 .resume = ide_pci_resume,
192 };
193
atiixp_ide_init(void)194 static int __init atiixp_ide_init(void)
195 {
196 return ide_pci_register_driver(&atiixp_pci_driver);
197 }
198
atiixp_ide_exit(void)199 static void __exit atiixp_ide_exit(void)
200 {
201 pci_unregister_driver(&atiixp_pci_driver);
202 }
203
204 module_init(atiixp_ide_init);
205 module_exit(atiixp_ide_exit);
206
207 MODULE_AUTHOR("HUI YU");
208 MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE");
209 MODULE_LICENSE("GPL");
210