1/*
2 *  linux/drivers/ide/pci/atiixp.c	Version 0.01-bart2	Feb. 26, 2004
3 *
4 *  Copyright (C) 2003 ATI Inc. <hyu@ati.com>
5 *  Copyright (C) 2004 Bartlomiej Zolnierkiewicz
6 *
7 */
8
9#include <linux/types.h>
10#include <linux/module.h>
11#include <linux/kernel.h>
12#include <linux/ioport.h>
13#include <linux/pci.h>
14#include <linux/hdreg.h>
15#include <linux/ide.h>
16#include <linux/delay.h>
17#include <linux/init.h>
18
19#include <asm/io.h>
20
21#define ATIIXP_IDE_PIO_TIMING		0x40
22#define ATIIXP_IDE_MDMA_TIMING		0x44
23#define ATIIXP_IDE_PIO_CONTROL		0x48
24#define ATIIXP_IDE_PIO_MODE		0x4a
25#define ATIIXP_IDE_UDMA_CONTROL		0x54
26#define ATIIXP_IDE_UDMA_MODE		0x56
27
28typedef struct {
29	u8 command_width;
30	u8 recover_width;
31} atiixp_ide_timing;
32
33static atiixp_ide_timing pio_timing[] = {
34	{ 0x05, 0x0d },
35	{ 0x04, 0x07 },
36	{ 0x03, 0x04 },
37	{ 0x02, 0x02 },
38	{ 0x02, 0x00 },
39};
40
41static atiixp_ide_timing mdma_timing[] = {
42	{ 0x07, 0x07 },
43	{ 0x02, 0x01 },
44	{ 0x02, 0x00 },
45};
46
47static int save_mdma_mode[4];
48
49static DEFINE_SPINLOCK(atiixp_lock);
50
51/**
52 *	atiixp_dma_2_pio		-	return the PIO mode matching DMA
53 *	@xfer_rate: transfer speed
54 *
55 *	Returns the nearest equivalent PIO timing for the PIO or DMA
56 *	mode requested by the controller.
57 */
58
59static u8 atiixp_dma_2_pio(u8 xfer_rate) {
60	switch(xfer_rate) {
61		case XFER_UDMA_6:
62		case XFER_UDMA_5:
63		case XFER_UDMA_4:
64		case XFER_UDMA_3:
65		case XFER_UDMA_2:
66		case XFER_UDMA_1:
67		case XFER_UDMA_0:
68		case XFER_MW_DMA_2:
69		case XFER_PIO_4:
70			return 4;
71		case XFER_MW_DMA_1:
72		case XFER_PIO_3:
73			return 3;
74		case XFER_SW_DMA_2:
75		case XFER_PIO_2:
76			return 2;
77		case XFER_MW_DMA_0:
78		case XFER_SW_DMA_1:
79		case XFER_SW_DMA_0:
80		case XFER_PIO_1:
81		case XFER_PIO_0:
82		case XFER_PIO_SLOW:
83		default:
84			return 0;
85	}
86}
87
88static void atiixp_dma_host_on(ide_drive_t *drive)
89{
90	struct pci_dev *dev = drive->hwif->pci_dev;
91	unsigned long flags;
92	u16 tmp16;
93
94	spin_lock_irqsave(&atiixp_lock, flags);
95
96	pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
97	if (save_mdma_mode[drive->dn])
98		tmp16 &= ~(1 << drive->dn);
99	else
100		tmp16 |= (1 << drive->dn);
101	pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
102
103	spin_unlock_irqrestore(&atiixp_lock, flags);
104
105	ide_dma_host_on(drive);
106}
107
108static void atiixp_dma_host_off(ide_drive_t *drive)
109{
110	struct pci_dev *dev = drive->hwif->pci_dev;
111	unsigned long flags;
112	u16 tmp16;
113
114	spin_lock_irqsave(&atiixp_lock, flags);
115
116	pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
117	tmp16 &= ~(1 << drive->dn);
118	pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
119
120	spin_unlock_irqrestore(&atiixp_lock, flags);
121
122	ide_dma_host_off(drive);
123}
124
125/**
126 *	atiixp_tune_drive		-	tune a drive attached to a ATIIXP
127 *	@drive: drive to tune
128 *	@pio: desired PIO mode
129 *
130 *	Set the interface PIO mode.
131 */
132
133static void atiixp_tuneproc(ide_drive_t *drive, u8 pio)
134{
135	struct pci_dev *dev = drive->hwif->pci_dev;
136	unsigned long flags;
137	int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
138	u32 pio_timing_data;
139	u16 pio_mode_data;
140
141	spin_lock_irqsave(&atiixp_lock, flags);
142
143	pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
144	pio_mode_data &= ~(0x07 << (drive->dn * 4));
145	pio_mode_data |= (pio << (drive->dn * 4));
146	pci_write_config_word(dev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
147
148	pci_read_config_dword(dev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
149	pio_timing_data &= ~(0xff << timing_shift);
150	pio_timing_data |= (pio_timing[pio].recover_width << timing_shift) |
151		 (pio_timing[pio].command_width << (timing_shift + 4));
152	pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
153
154	spin_unlock_irqrestore(&atiixp_lock, flags);
155}
156
157/**
158 *	atiixp_tune_chipset	-	tune a ATIIXP interface
159 *	@drive: IDE drive to tune
160 *	@xferspeed: speed to configure
161 *
162 *	Set a ATIIXP interface channel to the desired speeds. This involves
163 *	requires the right timing data into the ATIIXP configuration space
164 *	then setting the drive parameters appropriately
165 */
166
167static int atiixp_speedproc(ide_drive_t *drive, u8 xferspeed)
168{
169	struct pci_dev *dev = drive->hwif->pci_dev;
170	unsigned long flags;
171	int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
172	u32 tmp32;
173	u16 tmp16;
174	u8 speed, pio;
175
176	speed = ide_rate_filter(drive, xferspeed);
177
178	spin_lock_irqsave(&atiixp_lock, flags);
179
180	save_mdma_mode[drive->dn] = 0;
181	if (speed >= XFER_UDMA_0) {
182		pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &tmp16);
183		tmp16 &= ~(0x07 << (drive->dn * 4));
184		tmp16 |= ((speed & 0x07) << (drive->dn * 4));
185		pci_write_config_word(dev, ATIIXP_IDE_UDMA_MODE, tmp16);
186	} else {
187		if ((speed >= XFER_MW_DMA_0) && (speed <= XFER_MW_DMA_2)) {
188			save_mdma_mode[drive->dn] = speed;
189			pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &tmp32);
190			tmp32 &= ~(0xff << timing_shift);
191			tmp32 |= (mdma_timing[speed & 0x03].recover_width << timing_shift) |
192				(mdma_timing[speed & 0x03].command_width << (timing_shift + 4));
193			pci_write_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, tmp32);
194		}
195	}
196
197	spin_unlock_irqrestore(&atiixp_lock, flags);
198
199	if (speed >= XFER_SW_DMA_0)
200		pio = atiixp_dma_2_pio(speed);
201	else
202		pio = speed - XFER_PIO_0;
203
204	atiixp_tuneproc(drive, pio);
205
206	return ide_config_drive_speed(drive, speed);
207}
208
209/**
210 *	atiixp_dma_check	-	set up an IDE device
211 *	@drive: IDE drive to configure
212 *
213 *	Set up the ATIIXP interface for the best available speed on this
214 *	interface, preferring DMA to PIO.
215 */
216
217static int atiixp_dma_check(ide_drive_t *drive)
218{
219	u8 tspeed, speed;
220
221	drive->init_speed = 0;
222
223	if (ide_tune_dma(drive))
224		return 0;
225
226	if (ide_use_fast_pio(drive)) {
227		tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);
228		speed = atiixp_dma_2_pio(XFER_PIO_0 + tspeed) + XFER_PIO_0;
229		atiixp_speedproc(drive, speed);
230	}
231
232	return -1;
233}
234
235/**
236 *	init_hwif_atiixp		-	fill in the hwif for the ATIIXP
237 *	@hwif: IDE interface
238 *
239 *	Set up the ide_hwif_t for the ATIIXP interface according to the
240 *	capabilities of the hardware.
241 */
242
243static void __devinit init_hwif_atiixp(ide_hwif_t *hwif)
244{
245	u8 udma_mode = 0;
246	u8 ch = hwif->channel;
247	struct pci_dev *pdev = hwif->pci_dev;
248
249	if (!hwif->irq)
250		hwif->irq = ch ? 15 : 14;
251
252	hwif->autodma = 0;
253	hwif->tuneproc = &atiixp_tuneproc;
254	hwif->speedproc = &atiixp_speedproc;
255	hwif->drives[0].autotune = 1;
256	hwif->drives[1].autotune = 1;
257
258	if (!hwif->dma_base)
259		return;
260
261	hwif->atapi_dma = 1;
262	hwif->ultra_mask = 0x3f;
263	hwif->mwdma_mask = 0x06;
264	hwif->swdma_mask = 0x04;
265
266	pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ch, &udma_mode);
267	if ((udma_mode & 0x07) >= 0x04 || (udma_mode & 0x70) >= 0x40)
268		hwif->udma_four = 1;
269	else
270		hwif->udma_four = 0;
271
272	hwif->dma_host_on = &atiixp_dma_host_on;
273	hwif->dma_host_off = &atiixp_dma_host_off;
274	hwif->ide_dma_check = &atiixp_dma_check;
275	if (!noautodma)
276		hwif->autodma = 1;
277
278	hwif->drives[1].autodma = hwif->autodma;
279	hwif->drives[0].autodma = hwif->autodma;
280}
281
282
283static ide_pci_device_t atiixp_pci_info[] __devinitdata = {
284	{	/* 0 */
285		.name		= "ATIIXP",
286		.init_hwif	= init_hwif_atiixp,
287		.channels	= 2,
288		.autodma	= AUTODMA,
289		.enablebits	= {{0x48,0x01,0x00}, {0x48,0x08,0x00}},
290		.bootable	= ON_BOARD,
291	},{	/* 1 */
292		.name		= "SB600_PATA",
293		.init_hwif	= init_hwif_atiixp,
294		.channels	= 1,
295		.autodma	= AUTODMA,
296		.enablebits	= {{0x48,0x01,0x00}, {0x00,0x00,0x00}},
297 		.bootable	= ON_BOARD,
298 	},
299};
300
301/**
302 *	atiixp_init_one	-	called when a ATIIXP is found
303 *	@dev: the atiixp device
304 *	@id: the matching pci id
305 *
306 *	Called when the PCI registration layer (or the IDE initialization)
307 *	finds a device matching our IDE device tables.
308 */
309
310static int __devinit atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
311{
312	return ide_setup_pci_device(dev, &atiixp_pci_info[id->driver_data]);
313}
314
315static struct pci_device_id atiixp_pci_tbl[] = {
316	{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP200_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
317	{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP300_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
318	{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
319	{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
320	{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP700_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
321	{ 0, },
322};
323MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl);
324
325static struct pci_driver driver = {
326	.name		= "ATIIXP_IDE",
327	.id_table	= atiixp_pci_tbl,
328	.probe		= atiixp_init_one,
329};
330
331static int __init atiixp_ide_init(void)
332{
333	return ide_pci_register_driver(&driver);
334}
335
336module_init(atiixp_ide_init);
337
338MODULE_AUTHOR("HUI YU");
339MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE");
340MODULE_LICENSE("GPL");
341