atiixp.c revision 2bfba3c444fe8b2ab1c38112a89d8f03b61136ca 
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
22typedef struct {
23	u8 command_width;
24	u8 recover_width;
25} atiixp_ide_timing;
26
27static atiixp_ide_timing pio_timing[] = {
28	{ 0x05, 0x0d },
29	{ 0x04, 0x07 },
30	{ 0x03, 0x04 },
31	{ 0x02, 0x02 },
32	{ 0x02, 0x00 },
33};
34
35static atiixp_ide_timing mdma_timing[] = {
36	{ 0x07, 0x07 },
37	{ 0x02, 0x01 },
38	{ 0x02, 0x00 },
39};
40
41static 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
51static 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 & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 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
84static 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 & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 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
121static 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
134static 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
140static 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
170static 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
175static 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};
183MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl);
184
185static 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
194static int __init atiixp_ide_init(void)
195{
196	return ide_pci_register_driver(&atiixp_pci_driver);
197}
198
199static void __exit atiixp_ide_exit(void)
200{
201	pci_unregister_driver(&atiixp_pci_driver);
202}
203
204module_init(atiixp_ide_init);
205module_exit(atiixp_ide_exit);
206
207MODULE_AUTHOR("HUI YU");
208MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE");
209MODULE_LICENSE("GPL");
210