summaryrefslogtreecommitdiffstats
path: root/drivers/ata/pata_hpt3x3.c
blob: 255c5aaff3a81e8c3ddce32dca7ba49a6dd0cf1d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
/*
 *	pata_hpt3x3		-	HPT3x3 driver
 *	(c) Copyright 2005-2006 Red Hat
 *
 *	Was pata_hpt34x but the naming was confusing as it supported the
 *	343 and 363 so it has been renamed.
 *
 *	Based on:
 *	linux/drivers/ide/pci/hpt34x.c		Version 0.40	Sept 10, 2002
 *	Copyright (C) 1998-2000	Andre Hedrick <andre@linux-ide.org>
 *
 *	May be copied or modified under the terms of the GNU General Public
 *	License
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>

#define DRV_NAME	"pata_hpt3x3"
#define DRV_VERSION	"0.6.1"

/**
 *	hpt3x3_set_piomode		-	PIO setup
 *	@ap: ATA interface
 *	@adev: device on the interface
 *
 *	Set our PIO requirements. This is fairly simple on the HPT3x3 as
 *	all we have to do is clear the MWDMA and UDMA bits then load the
 *	mode number.
 */

static void hpt3x3_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	u32 r1, r2;
	int dn = 2 * ap->port_no + adev->devno;

	pci_read_config_dword(pdev, 0x44, &r1);
	pci_read_config_dword(pdev, 0x48, &r2);
	/* Load the PIO timing number */
	r1 &= ~(7 << (3 * dn));
	r1 |= (adev->pio_mode - XFER_PIO_0) << (3 * dn);
	r2 &= ~(0x11 << dn);	/* Clear MWDMA and UDMA bits */

	pci_write_config_dword(pdev, 0x44, r1);
	pci_write_config_dword(pdev, 0x48, r2);
}

#if defined(CONFIG_PATA_HPT3X3_DMA)
/**
 *	hpt3x3_set_dmamode		-	DMA timing setup
 *	@ap: ATA interface
 *	@adev: Device being configured
 *
 *	Set up the channel for MWDMA or UDMA modes. Much the same as with
 *	PIO, load the mode number and then set MWDMA or UDMA flag.
 *
 *	0x44 : bit 0-2 master mode, 3-5 slave mode, etc
 *	0x48 : bit 4/0 DMA/UDMA bit 5/1 for slave etc
 */

static void hpt3x3_set_dmamode(struct ata_port *ap, struct ata_device *adev)
{
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	u32 r1, r2;
	int dn = 2 * ap->port_no + adev->devno;
	int mode_num = adev->dma_mode & 0x0F;

	pci_read_config_dword(pdev, 0x44, &r1);
	pci_read_config_dword(pdev, 0x48, &r2);
	/* Load the timing number */
	r1 &= ~(7 << (3 * dn));
	r1 |= (mode_num << (3 * dn));
	r2 &= ~(0x11 << dn);	/* Clear MWDMA and UDMA bits */

	if (adev->dma_mode >= XFER_UDMA_0)
		r2 |= (0x01 << dn);	/* Ultra mode */
	else
		r2 |= (0x10 << dn);	/* MWDMA */

	pci_write_config_dword(pdev, 0x44, r1);
	pci_write_config_dword(pdev, 0x48, r2);
}

/**
 *	hpt3x3_freeze		-	DMA workaround
 *	@ap: port to freeze
 *
 *	When freezing an HPT3x3 we must stop any pending DMA before
 *	writing to the control register or the chip will hang
 */

static void hpt3x3_freeze(struct ata_port *ap)
{
	void __iomem *mmio = ap->ioaddr.bmdma_addr;

	iowrite8(ioread8(mmio + ATA_DMA_CMD) & ~ ATA_DMA_START,
			mmio + ATA_DMA_CMD);
	ata_sff_dma_pause(ap);
	ata_sff_freeze(ap);
}

/**
 *	hpt3x3_bmdma_setup	-	DMA workaround
 *	@qc: Queued command
 *
 *	When issuing BMDMA we must clean up the error/active bits in
 *	software on this device
 */

static void hpt3x3_bmdma_setup(struct ata_queued_cmd *qc)
{
	struct ata_port *ap = qc->ap;
	u8 r = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
	r |= ATA_DMA_INTR | ATA_DMA_ERR;
	iowrite8(r, ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
	return ata_bmdma_setup(qc);
}

/**
 *	hpt3x3_atapi_dma	-	ATAPI DMA check
 *	@qc: Queued command
 *
 *	Just say no - we don't do ATAPI DMA
 */

static int hpt3x3_atapi_dma(struct ata_queued_cmd *qc)
{
	return 1;
}

#endif /* CONFIG_PATA_HPT3X3_DMA */

static struct scsi_host_template hpt3x3_sht = {
	ATA_BMDMA_SHT(DRV_NAME),
};

static struct ata_port_operations hpt3x3_port_ops = {
	.inherits	= &ata_bmdma_port_ops,
	.cable_detect	= ata_cable_40wire,
	.set_piomode	= hpt3x3_set_piomode,
#if defined(CONFIG_PATA_HPT3X3_DMA)
	.set_dmamode	= hpt3x3_set_dmamode,
	.bmdma_setup	= hpt3x3_bmdma_setup,
	.check_atapi_dma= hpt3x3_atapi_dma,
	.freeze		= hpt3x3_freeze,
#endif

};

/**
 *	hpt3x3_init_chipset	-	chip setup
 *	@dev: PCI device
 *
 *	Perform the setup required at boot and on resume.
 */

static void hpt3x3_init_chipset(struct pci_dev *dev)
{
	u16 cmd;
	/* Initialize the board */
	pci_write_config_word(dev, 0x80, 0x00);
	/* Check if it is a 343 or a 363. 363 has COMMAND_MEMORY set */
	pci_read_config_word(dev, PCI_COMMAND, &cmd);
	if (cmd & PCI_COMMAND_MEMORY)
		pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF0);
	else
		pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x20);
}

/**
 *	hpt3x3_init_one		-	Initialise an HPT343/363
 *	@pdev: PCI device
 *	@id: Entry in match table
 *
 *	Perform basic initialisation. We set the device up so we access all
 *	ports via BAR4. This is necessary to work around errata.
 */

static int hpt3x3_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
	static const struct ata_port_info info = {
		.flags = ATA_FLAG_SLAVE_POSS,
		.pio_mask = ATA_PIO4,
#if defined(CONFIG_PATA_HPT3X3_DMA)
		/* Further debug needed */
		.mwdma_mask = ATA_MWDMA2,
		.udma_mask = ATA_UDMA2,
#endif
		.port_ops = &hpt3x3_port_ops
	};
	/* Register offsets of taskfiles in BAR4 area */
	static const u8 offset_cmd[2] = { 0x20, 0x28 };
	static const u8 offset_ctl[2] = { 0x36, 0x3E };
	const struct ata_port_info *ppi[] = { &info, NULL };
	struct ata_host *host;
	int i, rc;
	void __iomem *base;

	hpt3x3_init_chipset(pdev);

	ata_print_version_once(&pdev->dev, DRV_VERSION);

	host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2);
	if (!host)
		return -ENOMEM;
	/* acquire resources and fill host */
	rc = pcim_enable_device(pdev);
	if (rc)
		return rc;

	/* Everything is relative to BAR4 if we set up this way */
	rc = pcim_iomap_regions(pdev, 1 << 4, DRV_NAME);
	if (rc == -EBUSY)
		pcim_pin_device(pdev);
	if (rc)
		return rc;
	host->iomap = pcim_iomap_table(pdev);
	rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
	if (rc)
		return rc;
	rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
	if (rc)
		return rc;

	base = host->iomap[4];	/* Bus mastering base */

	for (i = 0; i < host->n_ports; i++) {
		struct ata_port *ap = host->ports[i];
		struct ata_ioports *ioaddr = &ap->ioaddr;

		ioaddr->cmd_addr = base + offset_cmd[i];
		ioaddr->altstatus_addr =
		ioaddr->ctl_addr = base + offset_ctl[i];
		ioaddr->scr_addr = NULL;
		ata_sff_std_ports(ioaddr);
		ioaddr->bmdma_addr = base + 8 * i;

		ata_port_pbar_desc(ap, 4, -1, "ioport");
		ata_port_pbar_desc(ap, 4, offset_cmd[i], "cmd");
	}
	pci_set_master(pdev);
	return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
				 IRQF_SHARED, &hpt3x3_sht);
}

#ifdef CONFIG_PM
static int hpt3x3_reinit_one(struct pci_dev *dev)
{
	struct ata_host *host = pci_get_drvdata(dev);
	int rc;

	rc = ata_pci_device_do_resume(dev);
	if (rc)
		return rc;

	hpt3x3_init_chipset(dev);

	ata_host_resume(host);
	return 0;
}
#endif

static const struct pci_device_id hpt3x3[] = {
	{ PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT343), },

	{ },
};

static struct pci_driver hpt3x3_pci_driver = {
	.name 		= DRV_NAME,
	.id_table	= hpt3x3,
	.probe 		= hpt3x3_init_one,
	.remove		= ata_pci_remove_one,
#ifdef CONFIG_PM
	.suspend	= ata_pci_device_suspend,
	.resume		= hpt3x3_reinit_one,
#endif
};

module_pci_driver(hpt3x3_pci_driver);

MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for the Highpoint HPT343/363");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, hpt3x3);
MODULE_VERSION(DRV_VERSION);