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
22struct atiixp_ide_timing {
23	u8 command_width;
24	u8 recover_width;
25};
26
27static struct atiixp_ide_timing pio_timing[] = {
28	{ 0x05, 0x0d },
29	{ 0x04, 0x07 },
30	{ 0x03, 0x04 },
31	{ 0x02, 0x02 },
32	{ 0x02, 0x00 },
33};
34
35static struct 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 *	@hwif: port
46 *	@drive: drive
47 *
48 *	Set the interface PIO mode.
49 */
50
51static 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
85static 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
123static 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
136static 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
142static 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
171static 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
176static 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};
185MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl);
186
187static 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
196static int __init atiixp_ide_init(void)
197{
198	return ide_pci_register_driver(&atiixp_pci_driver);
199}
200
201static void __exit atiixp_ide_exit(void)
202{
203	pci_unregister_driver(&atiixp_pci_driver);
204}
205
206module_init(atiixp_ide_init);
207module_exit(atiixp_ide_exit);
208
209MODULE_AUTHOR("HUI YU");
210MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE");
211MODULE_LICENSE("GPL");
212