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669a5db4 JG |
1 | /* |
2 | * RZ1000/1001 driver based upon | |
3 | * | |
4 | * linux/drivers/ide/pci/rz1000.c Version 0.06 January 12, 2003 | |
5 | * Copyright (C) 1995-1998 Linus Torvalds & author (see below) | |
6 | * Principal Author: mlord@pobox.com (Mark Lord) | |
7 | * | |
8 | * See linux/MAINTAINERS for address of current maintainer. | |
9 | * | |
10 | * This file provides support for disabling the buggy read-ahead | |
11 | * mode of the RZ1000 IDE chipset, commonly used on Intel motherboards. | |
12 | */ | |
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/pci.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/blkdev.h> | |
19 | #include <linux/delay.h> | |
20 | #include <scsi/scsi_host.h> | |
21 | #include <linux/libata.h> | |
22 | ||
23 | #define DRV_NAME "pata_rz1000" | |
8bc3fc47 | 24 | #define DRV_VERSION "0.2.4" |
669a5db4 JG |
25 | |
26 | ||
669a5db4 JG |
27 | /** |
28 | * rz1000_set_mode - mode setting function | |
0260731f | 29 | * @link: ATA link |
b229a7b0 | 30 | * @unused: returned device on set_mode failure |
669a5db4 JG |
31 | * |
32 | * Use a non standard set_mode function. We don't want to be tuned. We | |
33 | * would prefer to be BIOS generic but for the fact our hardware is | |
34 | * whacked out. | |
35 | */ | |
36 | ||
0260731f | 37 | static int rz1000_set_mode(struct ata_link *link, struct ata_device **unused) |
669a5db4 | 38 | { |
f58229f8 | 39 | struct ata_device *dev; |
669a5db4 | 40 | |
0260731f | 41 | ata_link_for_each_dev(dev, link) { |
9666f400 | 42 | if (ata_dev_enabled(dev)) { |
669a5db4 JG |
43 | /* We don't really care */ |
44 | dev->pio_mode = XFER_PIO_0; | |
45 | dev->xfer_mode = XFER_PIO_0; | |
46 | dev->xfer_shift = ATA_SHIFT_PIO; | |
47 | dev->flags |= ATA_DFLAG_PIO; | |
e852f705 | 48 | ata_dev_printk(dev, KERN_INFO, "configured for PIO\n"); |
669a5db4 JG |
49 | } |
50 | } | |
b229a7b0 | 51 | return 0; |
669a5db4 JG |
52 | } |
53 | ||
54 | ||
55 | static struct scsi_host_template rz1000_sht = { | |
56 | .module = THIS_MODULE, | |
57 | .name = DRV_NAME, | |
58 | .ioctl = ata_scsi_ioctl, | |
59 | .queuecommand = ata_scsi_queuecmd, | |
60 | .can_queue = ATA_DEF_QUEUE, | |
61 | .this_id = ATA_SHT_THIS_ID, | |
62 | .sg_tablesize = LIBATA_MAX_PRD, | |
669a5db4 JG |
63 | .cmd_per_lun = ATA_SHT_CMD_PER_LUN, |
64 | .emulated = ATA_SHT_EMULATED, | |
65 | .use_clustering = ATA_SHT_USE_CLUSTERING, | |
66 | .proc_name = DRV_NAME, | |
67 | .dma_boundary = ATA_DMA_BOUNDARY, | |
68 | .slave_configure = ata_scsi_slave_config, | |
afdfe899 | 69 | .slave_destroy = ata_scsi_slave_destroy, |
669a5db4 JG |
70 | .bios_param = ata_std_bios_param, |
71 | }; | |
72 | ||
73 | static struct ata_port_operations rz1000_port_ops = { | |
74 | .set_mode = rz1000_set_mode, | |
75 | ||
669a5db4 JG |
76 | .tf_load = ata_tf_load, |
77 | .tf_read = ata_tf_read, | |
78 | .check_status = ata_check_status, | |
79 | .exec_command = ata_exec_command, | |
80 | .dev_select = ata_std_dev_select, | |
81 | ||
669a5db4 JG |
82 | .bmdma_setup = ata_bmdma_setup, |
83 | .bmdma_start = ata_bmdma_start, | |
84 | .bmdma_stop = ata_bmdma_stop, | |
85 | .bmdma_status = ata_bmdma_status, | |
86 | ||
87 | .qc_prep = ata_qc_prep, | |
88 | .qc_issue = ata_qc_issue_prot, | |
bda30288 | 89 | |
0d5ff566 | 90 | .data_xfer = ata_data_xfer, |
669a5db4 JG |
91 | |
92 | .freeze = ata_bmdma_freeze, | |
93 | .thaw = ata_bmdma_thaw, | |
2a25dfe4 | 94 | .error_handler = ata_bmdma_error_handler, |
669a5db4 | 95 | .post_internal_cmd = ata_bmdma_post_internal_cmd, |
2a25dfe4 | 96 | .cable_detect = ata_cable_40wire, |
669a5db4 JG |
97 | |
98 | .irq_handler = ata_interrupt, | |
99 | .irq_clear = ata_bmdma_irq_clear, | |
246ce3b6 | 100 | .irq_on = ata_irq_on, |
669a5db4 | 101 | |
81ad1837 | 102 | .port_start = ata_sff_port_start, |
669a5db4 JG |
103 | }; |
104 | ||
ad4a42d2 A |
105 | static int rz1000_fifo_disable(struct pci_dev *pdev) |
106 | { | |
107 | u16 reg; | |
108 | /* Be exceptionally paranoid as we must be sure to apply the fix */ | |
109 | if (pci_read_config_word(pdev, 0x40, ®) != 0) | |
110 | return -1; | |
111 | reg &= 0xDFFF; | |
112 | if (pci_write_config_word(pdev, 0x40, reg) != 0) | |
113 | return -1; | |
114 | printk(KERN_INFO DRV_NAME ": disabled chipset readahead.\n"); | |
115 | return 0; | |
116 | } | |
117 | ||
669a5db4 JG |
118 | /** |
119 | * rz1000_init_one - Register RZ1000 ATA PCI device with kernel services | |
120 | * @pdev: PCI device to register | |
121 | * @ent: Entry in rz1000_pci_tbl matching with @pdev | |
122 | * | |
123 | * Configure an RZ1000 interface. This doesn't require much special | |
124 | * handling except that we *MUST* kill the chipset readahead or the | |
125 | * user may experience data corruption. | |
126 | */ | |
127 | ||
128 | static int rz1000_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) | |
129 | { | |
130 | static int printed_version; | |
1626aeb8 | 131 | static const struct ata_port_info info = { |
669a5db4 | 132 | .sht = &rz1000_sht, |
1d2808fd | 133 | .flags = ATA_FLAG_SLAVE_POSS, |
669a5db4 JG |
134 | .pio_mask = 0x1f, |
135 | .port_ops = &rz1000_port_ops | |
136 | }; | |
1626aeb8 | 137 | const struct ata_port_info *ppi[] = { &info, NULL }; |
669a5db4 JG |
138 | |
139 | if (!printed_version++) | |
140 | printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n"); | |
141 | ||
1626aeb8 TH |
142 | if (rz1000_fifo_disable(pdev) == 0) |
143 | return ata_pci_init_one(pdev, ppi); | |
144 | ||
669a5db4 JG |
145 | printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n"); |
146 | /* Not safe to use so skip */ | |
147 | return -ENODEV; | |
148 | } | |
149 | ||
438ac6d5 | 150 | #ifdef CONFIG_PM |
ad4a42d2 A |
151 | static int rz1000_reinit_one(struct pci_dev *pdev) |
152 | { | |
153 | /* If this fails on resume (which is a "cant happen" case), we | |
154 | must stop as any progress risks data loss */ | |
155 | if (rz1000_fifo_disable(pdev)) | |
156 | panic("rz1000 fifo"); | |
157 | return ata_pci_device_resume(pdev); | |
158 | } | |
438ac6d5 | 159 | #endif |
ad4a42d2 | 160 | |
2d2744fc JG |
161 | static const struct pci_device_id pata_rz1000[] = { |
162 | { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), }, | |
163 | { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), }, | |
164 | ||
165 | { }, | |
669a5db4 JG |
166 | }; |
167 | ||
168 | static struct pci_driver rz1000_pci_driver = { | |
2d2744fc | 169 | .name = DRV_NAME, |
669a5db4 JG |
170 | .id_table = pata_rz1000, |
171 | .probe = rz1000_init_one, | |
ad4a42d2 | 172 | .remove = ata_pci_remove_one, |
438ac6d5 | 173 | #ifdef CONFIG_PM |
ad4a42d2 A |
174 | .suspend = ata_pci_device_suspend, |
175 | .resume = rz1000_reinit_one, | |
438ac6d5 | 176 | #endif |
669a5db4 JG |
177 | }; |
178 | ||
669a5db4 JG |
179 | static int __init rz1000_init(void) |
180 | { | |
181 | return pci_register_driver(&rz1000_pci_driver); | |
182 | } | |
183 | ||
184 | static void __exit rz1000_exit(void) | |
185 | { | |
186 | pci_unregister_driver(&rz1000_pci_driver); | |
187 | } | |
188 | ||
189 | MODULE_AUTHOR("Alan Cox"); | |
190 | MODULE_DESCRIPTION("low-level driver for RZ1000 PCI ATA"); | |
191 | MODULE_LICENSE("GPL"); | |
192 | MODULE_DEVICE_TABLE(pci, pata_rz1000); | |
193 | MODULE_VERSION(DRV_VERSION); | |
194 | ||
195 | module_init(rz1000_init); | |
196 | module_exit(rz1000_exit); | |
197 |