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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