xref: /openbmc/linux/drivers/ata/pata_piccolo.c (revision 25df73d9)
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 
tosh_set_piomode(struct ata_port * ap,struct ata_device * adev)31 static 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 
tosh_set_dmamode(struct ata_port * ap,struct ata_device * adev)44 static 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 
65 static const struct scsi_host_template tosh_sht = {
66 	ATA_BMDMA_SHT(DRV_NAME),
67 };
68 
69 static 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 
ata_tosh_init_one(struct pci_dev * dev,const struct pci_device_id * id)86 static 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 
100 static 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 
108 static 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 
119 module_pci_driver(ata_tosh_pci_driver);
120 
121 MODULE_AUTHOR("Alan Cox");
122 MODULE_DESCRIPTION("Low level driver for Toshiba Piccolo ATA");
123 MODULE_LICENSE("GPL");
124 MODULE_DEVICE_TABLE(pci, ata_tosh);
125 MODULE_VERSION(DRV_VERSION);
126