1/*
2 *  pata_piccolo.c - Toshiba Piccolo PATA/SATA controller driver.
3 *
4 *  This is basically an update to ata_generic.c to add Toshiba Piccolo support
5 *  then split out to keep ata_generic "clean".
6 *
7 *  Copyright 2005 Red Hat Inc, all rights reserved.
8 *
9 *  Elements from ide/pci/generic.c
10 *	    Copyright (C) 2001-2002	Andre Hedrick <andre@linux-ide.org>
11 *	    Portions (C) Copyright 2002  Red Hat Inc <alan@redhat.com>
12 *
13 *  May be copied or modified under the terms of the GNU General Public License
14 *
15 *  The timing data tables/programming info are courtesy of the NetBSD driver
16 */
17
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/pci.h>
21#include <linux/blkdev.h>
22#include <linux/delay.h>
23#include <scsi/scsi_host.h>
24#include <linux/libata.h>
25
26#define DRV_NAME "pata_piccolo"
27#define DRV_VERSION "0.0.1"
28
29
30
31static void tosh_set_piomode(struct ata_port *ap, struct ata_device *adev)
32{
33	static const u16 pio[6] = {	/* For reg 0x50 low word & E088 */
34		0x0566, 0x0433, 0x0311, 0x0201, 0x0200, 0x0100
35	};
36	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
37	u16 conf;
38	pci_read_config_word(pdev, 0x50, &conf);
39	conf &= 0xE088;
40	conf |= pio[adev->pio_mode - XFER_PIO_0];
41	pci_write_config_word(pdev, 0x50, conf);
42}
43
44static void tosh_set_dmamode(struct ata_port *ap, struct ata_device *adev)
45{
46	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
47	u32 conf;
48	pci_read_config_dword(pdev, 0x5C, &conf);
49	conf &= 0x78FFE088;	/* Keep the other bits */
50	if (adev->dma_mode >= XFER_UDMA_0) {
51		int udma = adev->dma_mode - XFER_UDMA_0;
52		conf |= 0x80000000;
53		conf |= (udma + 2) << 28;
54		conf |= (2 - udma) * 0x111;	/* spread into three nibbles */
55	} else {
56		static const u32 mwdma[4] = {
57			0x0655, 0x0200, 0x0200, 0x0100
58		};
59		conf |= mwdma[adev->dma_mode - XFER_MW_DMA_0];
60	}
61	pci_write_config_dword(pdev, 0x5C, conf);
62}
63
64
65static const struct scsi_host_template tosh_sht = {
66	ATA_BMDMA_SHT(DRV_NAME),
67};
68
69static struct ata_port_operations tosh_port_ops = {
70	.inherits	= &ata_bmdma_port_ops,
71	.cable_detect	= ata_cable_unknown,
72	.set_piomode	= tosh_set_piomode,
73	.set_dmamode	= tosh_set_dmamode
74};
75
76/**
77 *	ata_tosh_init_one		-	attach generic IDE
78 *	@dev: PCI device found
79 *	@id: match entry
80 *
81 *	Called each time a matching IDE interface is found. We check if the
82 *	interface is one we wish to claim and if so we perform any chip
83 *	specific hacks then let the ATA layer do the heavy lifting.
84 */
85
86static int ata_tosh_init_one(struct pci_dev *dev, const struct pci_device_id *id)
87{
88	static const struct ata_port_info info = {
89		.flags = ATA_FLAG_SLAVE_POSS,
90		.pio_mask = ATA_PIO5,
91		.mwdma_mask = ATA_MWDMA2,
92		.udma_mask = ATA_UDMA2,
93		.port_ops = &tosh_port_ops
94	};
95	const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
96	/* Just one port for the moment */
97	return ata_pci_bmdma_init_one(dev, ppi, &tosh_sht, NULL, 0);
98}
99
100static struct pci_device_id ata_tosh[] = {
101	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
102	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2),  },
103	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3),  },
104	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5),  },
105	{ 0, },
106};
107
108static struct pci_driver ata_tosh_pci_driver = {
109	.name 		= DRV_NAME,
110	.id_table	= ata_tosh,
111	.probe 		= ata_tosh_init_one,
112	.remove		= ata_pci_remove_one,
113#ifdef CONFIG_PM_SLEEP
114	.suspend	= ata_pci_device_suspend,
115	.resume		= ata_pci_device_resume,
116#endif
117};
118
119module_pci_driver(ata_tosh_pci_driver);
120
121MODULE_AUTHOR("Alan Cox");
122MODULE_DESCRIPTION("Low level driver for Toshiba Piccolo ATA");
123MODULE_LICENSE("GPL");
124MODULE_DEVICE_TABLE(pci, ata_tosh);
125MODULE_VERSION(DRV_VERSION);
126