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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/init.h> |
22 | #include <linux/blkdev.h> |
23 | #include <linux/delay.h> |
24 | #include <scsi/scsi_host.h> |
25 | #include <linux/libata.h> |
26 | |
27 | #define DRV_NAME "pata_piccolo" |
28 | #define DRV_VERSION "0.0.1" |
29 | |
30 | |
31 | |
32 | static void tosh_set_piomode(struct ata_port *ap, struct ata_device *adev) |
33 | { |
34 | static const u16 pio[6] = { /* For reg 0x50 low word & E088 */ |
35 | 0x0566, 0x0433, 0x0311, 0x0201, 0x0200, 0x0100 |
36 | }; |
37 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
38 | u16 conf; |
39 | pci_read_config_word(pdev, 0x50, &conf); |
40 | conf &= 0xE088; |
41 | conf |= pio[adev->pio_mode - XFER_PIO_0]; |
42 | pci_write_config_word(pdev, 0x50, conf); |
43 | } |
44 | |
45 | static void tosh_set_dmamode(struct ata_port *ap, struct ata_device *adev) |
46 | { |
47 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
48 | u32 conf; |
49 | pci_read_config_dword(pdev, 0x5C, &conf); |
50 | conf &= 0x78FFE088; /* Keep the other bits */ |
51 | if (adev->dma_mode >= XFER_UDMA_0) { |
52 | int udma = adev->dma_mode - XFER_UDMA_0; |
53 | conf |= 0x80000000; |
54 | conf |= (udma + 2) << 28; |
55 | conf |= (2 - udma) * 0x111; /* spread into three nibbles */ |
56 | } else { |
57 | static const u32 mwdma[4] = { |
58 | 0x0655, 0x0200, 0x0200, 0x0100 |
59 | }; |
60 | conf |= mwdma[adev->dma_mode - XFER_MW_DMA_0]; |
61 | } |
62 | pci_write_config_dword(pdev, 0x5C, conf); |
63 | } |
64 | |
65 | |
66 | static struct scsi_host_template tosh_sht = { |
67 | ATA_BMDMA_SHT(DRV_NAME), |
68 | }; |
69 | |
70 | static struct ata_port_operations tosh_port_ops = { |
71 | .inherits = &ata_bmdma_port_ops, |
72 | .cable_detect = ata_cable_unknown, |
73 | .set_piomode = tosh_set_piomode, |
74 | .set_dmamode = tosh_set_dmamode |
75 | }; |
76 | |
77 | /** |
78 | * ata_tosh_init - attach generic IDE |
79 | * @dev: PCI device found |
80 | * @id: match entry |
81 | * |
82 | * Called each time a matching IDE interface is found. We check if the |
83 | * interface is one we wish to claim and if so we perform any chip |
84 | * specific hacks then let the ATA layer do the heavy lifting. |
85 | */ |
86 | |
87 | static int ata_tosh_init_one(struct pci_dev *dev, const struct pci_device_id *id) |
88 | { |
89 | static const struct ata_port_info info = { |
90 | .flags = ATA_FLAG_SLAVE_POSS, |
91 | .pio_mask = ATA_PIO5, |
92 | .mwdma_mask = ATA_MWDMA2, |
93 | .udma_mask = ATA_UDMA2, |
94 | .port_ops = &tosh_port_ops |
95 | }; |
96 | const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info }; |
97 | /* Just one port for the moment */ |
98 | return ata_pci_bmdma_init_one(dev, ppi, &tosh_sht, NULL, 0); |
99 | } |
100 | |
101 | static struct pci_device_id ata_tosh[] = { |
102 | { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), }, |
103 | { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), }, |
104 | { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3), }, |
105 | { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5), }, |
106 | { 0, }, |
107 | }; |
108 | |
109 | static struct pci_driver ata_tosh_pci_driver = { |
110 | .name = DRV_NAME, |
111 | .id_table = ata_tosh, |
112 | .probe = ata_tosh_init_one, |
113 | .remove = ata_pci_remove_one, |
114 | #ifdef CONFIG_PM |
115 | .suspend = ata_pci_device_suspend, |
116 | .resume = ata_pci_device_resume, |
117 | #endif |
118 | }; |
119 | |
120 | module_pci_driver(ata_tosh_pci_driver); |
121 | |
122 | MODULE_AUTHOR("Alan Cox"); |
123 | MODULE_DESCRIPTION("Low level driver for Toshiba Piccolo ATA"); |
124 | MODULE_LICENSE("GPL"); |
125 | MODULE_DEVICE_TABLE(pci, ata_tosh); |
126 | MODULE_VERSION(DRV_VERSION); |
127 |
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