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 struct atiixp_ide_timing {
23 u8 command_width;
24 u8 recover_width;
25 };
26
27 static struct atiixp_ide_timing pio_timing[] = {
28 { 0x05, 0x0d },
29 { 0x04, 0x07 },
30 { 0x03, 0x04 },
31 { 0x02, 0x02 },
32 { 0x02, 0x00 },
33 };
34
35 static struct 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 * @hwif: port
46 * @drive: drive
47 *
48 * Set the interface PIO mode.
49 */
50
atiixp_set_pio_mode(ide_hwif_t * hwif,ide_drive_t * drive)51 static void atiixp_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
52 {
53 struct pci_dev *dev = to_pci_dev(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 const u8 pio = drive->pio_mode - XFER_PIO_0;
59
60 spin_lock_irqsave(&atiixp_lock, flags);
61
62 pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
63 pio_mode_data &= ~(0x07 << (drive->dn * 4));
64 pio_mode_data |= (pio << (drive->dn * 4));
65 pci_write_config_word(dev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
66
67 pci_read_config_dword(dev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
68 pio_timing_data &= ~(0xff << timing_shift);
69 pio_timing_data |= (pio_timing[pio].recover_width << timing_shift) |
70 (pio_timing[pio].command_width << (timing_shift + 4));
71 pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
72
73 spin_unlock_irqrestore(&atiixp_lock, flags);
74 }
75
76 /**
77 * atiixp_set_dma_mode - set host controller for DMA mode
78 * @hwif: port
79 * @drive: drive
80 *
81 * Set a ATIIXP host controller to the desired DMA mode. This involves
82 * programming the right timing data into the PCI configuration space.
83 */
84
atiixp_set_dma_mode(ide_hwif_t * hwif,ide_drive_t * drive)85 static void atiixp_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
86 {
87 struct pci_dev *dev = to_pci_dev(hwif->dev);
88 unsigned long flags;
89 int timing_shift = (drive->dn ^ 1) * 8;
90 u32 tmp32;
91 u16 tmp16;
92 u16 udma_ctl = 0;
93 const u8 speed = drive->dma_mode;
94
95 spin_lock_irqsave(&atiixp_lock, flags);
96
97 pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &udma_ctl);
98
99 if (speed >= XFER_UDMA_0) {
100 pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &tmp16);
101 tmp16 &= ~(0x07 << (drive->dn * 4));
102 tmp16 |= ((speed & 0x07) << (drive->dn * 4));
103 pci_write_config_word(dev, ATIIXP_IDE_UDMA_MODE, tmp16);
104
105 udma_ctl |= (1 << drive->dn);
106 } else if (speed >= XFER_MW_DMA_0) {
107 u8 i = speed & 0x03;
108
109 pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &tmp32);
110 tmp32 &= ~(0xff << timing_shift);
111 tmp32 |= (mdma_timing[i].recover_width << timing_shift) |
112 (mdma_timing[i].command_width << (timing_shift + 4));
113 pci_write_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, tmp32);
114
115 udma_ctl &= ~(1 << drive->dn);
116 }
117
118 pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, udma_ctl);
119
120 spin_unlock_irqrestore(&atiixp_lock, flags);
121 }
122
atiixp_cable_detect(ide_hwif_t * hwif)123 static u8 atiixp_cable_detect(ide_hwif_t *hwif)
124 {
125 struct pci_dev *pdev = to_pci_dev(hwif->dev);
126 u8 udma_mode = 0, ch = hwif->channel;
127
128 pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ch, &udma_mode);
129
130 if ((udma_mode & 0x07) >= 0x04 || (udma_mode & 0x70) >= 0x40)
131 return ATA_CBL_PATA80;
132 else
133 return ATA_CBL_PATA40;
134 }
135
136 static const struct ide_port_ops atiixp_port_ops = {
137 .set_pio_mode = atiixp_set_pio_mode,
138 .set_dma_mode = atiixp_set_dma_mode,
139 .cable_detect = atiixp_cable_detect,
140 };
141
142 static const struct ide_port_info atiixp_pci_info[] = {
143 { /* 0: IXP200/300/400/700 */
144 .name = DRV_NAME,
145 .enablebits = {{0x48,0x01,0x00}, {0x48,0x08,0x00}},
146 .port_ops = &atiixp_port_ops,
147 .pio_mask = ATA_PIO4,
148 .mwdma_mask = ATA_MWDMA2,
149 .udma_mask = ATA_UDMA5,
150 },
151 { /* 1: IXP600 */
152 .name = DRV_NAME,
153 .enablebits = {{0x48,0x01,0x00}, {0x00,0x00,0x00}},
154 .port_ops = &atiixp_port_ops,
155 .host_flags = IDE_HFLAG_SINGLE,
156 .pio_mask = ATA_PIO4,
157 .mwdma_mask = ATA_MWDMA2,
158 .udma_mask = ATA_UDMA5,
159 },
160 };
161
162 /**
163 * atiixp_init_one - called when a ATIIXP is found
164 * @dev: the atiixp device
165 * @id: the matching pci id
166 *
167 * Called when the PCI registration layer (or the IDE initialization)
168 * finds a device matching our IDE device tables.
169 */
170
atiixp_init_one(struct pci_dev * dev,const struct pci_device_id * id)171 static int atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
172 {
173 return ide_pci_init_one(dev, &atiixp_pci_info[id->driver_data], NULL);
174 }
175
176 static const struct pci_device_id atiixp_pci_tbl[] = {
177 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), 0 },
178 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), 0 },
179 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), 0 },
180 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), 1 },
181 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP700_IDE), 0 },
182 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_HUDSON2_IDE), 0 },
183 { 0, },
184 };
185 MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl);
186
187 static struct pci_driver atiixp_pci_driver = {
188 .name = "ATIIXP_IDE",
189 .id_table = atiixp_pci_tbl,
190 .probe = atiixp_init_one,
191 .remove = ide_pci_remove,
192 .suspend = ide_pci_suspend,
193 .resume = ide_pci_resume,
194 };
195
atiixp_ide_init(void)196 static int __init atiixp_ide_init(void)
197 {
198 return ide_pci_register_driver(&atiixp_pci_driver);
199 }
200
atiixp_ide_exit(void)201 static void __exit atiixp_ide_exit(void)
202 {
203 pci_unregister_driver(&atiixp_pci_driver);
204 }
205
206 module_init(atiixp_ide_init);
207 module_exit(atiixp_ide_exit);
208
209 MODULE_AUTHOR("HUI YU");
210 MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE");
211 MODULE_LICENSE("GPL");
212
