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