blob: a7320ba15575490e85e1905b26b4669e4c18c173 [file] [log] [blame]
Jeff Garzik669a5db2006-08-29 18:12:40 -04001/*
2 * pata_opti.c - ATI PATA for new ATA layer
3 * (C) 2005 Red Hat Inc
4 * Alan Cox <alan@redhat.com>
5 *
6 * Based on
7 * linux/drivers/ide/pci/opti621.c Version 0.7 Sept 10, 2002
8 *
9 * Copyright (C) 1996-1998 Linus Torvalds & authors (see below)
10 *
11 * Authors:
12 * Jaromir Koutek <miri@punknet.cz>,
13 * Jan Harkes <jaharkes@cwi.nl>,
14 * Mark Lord <mlord@pobox.com>
15 * Some parts of code are from ali14xx.c and from rz1000.c.
16 *
17 * Also consulted the FreeBSD prototype driver by Kevin Day to try
18 * and resolve some confusions. Further documentation can be found in
19 * Ralf Brown's interrupt list
20 *
21 * If you have other variants of the Opti range (Viper/Vendetta) please
22 * try this driver with those PCI idents and report back. For the later
23 * chips see the pata_optidma driver
24 *
25 */
26
27#include <linux/kernel.h>
28#include <linux/module.h>
29#include <linux/pci.h>
30#include <linux/init.h>
31#include <linux/blkdev.h>
32#include <linux/delay.h>
33#include <scsi/scsi_host.h>
34#include <linux/libata.h>
35
36#define DRV_NAME "pata_opti"
Alan Coxc9619222006-09-26 17:53:38 +010037#define DRV_VERSION "0.2.5"
Jeff Garzik669a5db2006-08-29 18:12:40 -040038
39enum {
40 READ_REG = 0, /* index of Read cycle timing register */
41 WRITE_REG = 1, /* index of Write cycle timing register */
42 CNTRL_REG = 3, /* index of Control register */
43 STRAP_REG = 5, /* index of Strap register */
44 MISC_REG = 6 /* index of Miscellaneous register */
45};
46
47/**
48 * opti_pre_reset - probe begin
49 * @ap: ATA port
50 *
51 * Set up cable type and use generic probe init
52 */
53
54static int opti_pre_reset(struct ata_port *ap)
55{
56 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
57 static const struct pci_bits opti_enable_bits[] = {
58 { 0x45, 1, 0x80, 0x00 },
59 { 0x40, 1, 0x08, 0x00 }
60 };
61
Alan Coxc9619222006-09-26 17:53:38 +010062 if (!pci_test_config_bits(pdev, &opti_enable_bits[ap->port_no]))
63 return -ENOENT;
64
Jeff Garzik669a5db2006-08-29 18:12:40 -040065 ap->cbl = ATA_CBL_PATA40;
66 return ata_std_prereset(ap);
67}
68
69/**
70 * opti_probe_reset - probe reset
71 * @ap: ATA port
72 *
73 * Perform the ATA probe and bus reset sequence plus specific handling
74 * for this hardware. The Opti needs little handling - we have no UDMA66
75 * capability that needs cable detection. All we must do is check the port
76 * is enabled.
77 */
78
79static void opti_error_handler(struct ata_port *ap)
80{
81 ata_bmdma_drive_eh(ap, opti_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
82}
83
84/**
85 * opti_write_reg - control register setup
86 * @ap: ATA port
87 * @value: value
88 * @reg: control register number
89 *
90 * The Opti uses magic 'trapdoor' register accesses to do configuration
91 * rather than using PCI space as other controllers do. The double inw
92 * on the error register activates configuration mode. We can then write
93 * the control register
94 */
95
96static void opti_write_reg(struct ata_port *ap, u8 val, int reg)
97{
98 unsigned long regio = ap->ioaddr.cmd_addr;
99
100 /* These 3 unlock the control register access */
101 inw(regio + 1);
102 inw(regio + 1);
103 outb(3, regio + 2);
104
105 /* Do the I/O */
106 outb(val, regio + reg);
107
108 /* Relock */
109 outb(0x83, regio + 2);
110}
111
112#if 0
113/**
114 * opti_read_reg - control register read
115 * @ap: ATA port
116 * @reg: control register number
117 *
118 * The Opti uses magic 'trapdoor' register accesses to do configuration
119 * rather than using PCI space as other controllers do. The double inw
120 * on the error register activates configuration mode. We can then read
121 * the control register
122 */
123
124static u8 opti_read_reg(struct ata_port *ap, int reg)
125{
126 unsigned long regio = ap->ioaddr.cmd_addr;
127 u8 ret;
128 inw(regio + 1);
129 inw(regio + 1);
130 outb(3, regio + 2);
131 ret = inb(regio + reg);
132 outb(0x83, regio + 2);
133}
134#endif
135
136/**
137 * opti_set_piomode - set initial PIO mode data
138 * @ap: ATA interface
139 * @adev: ATA device
140 *
141 * Called to do the PIO mode setup. Timing numbers are taken from
142 * the FreeBSD driver then pre computed to keep the code clean. There
143 * are two tables depending on the hardware clock speed.
144 */
145
146static void opti_set_piomode(struct ata_port *ap, struct ata_device *adev)
147{
148 struct ata_device *pair = ata_dev_pair(adev);
149 int clock;
150 int pio = adev->pio_mode - XFER_PIO_0;
151 unsigned long regio = ap->ioaddr.cmd_addr;
152 u8 addr;
153
154 /* Address table precomputed with prefetch off and a DCLK of 2 */
155 static const u8 addr_timing[2][5] = {
156 { 0x30, 0x20, 0x20, 0x10, 0x10 },
157 { 0x20, 0x20, 0x10, 0x10, 0x10 }
158 };
159 static const u8 data_rec_timing[2][5] = {
160 { 0x6B, 0x56, 0x42, 0x32, 0x31 },
161 { 0x58, 0x44, 0x32, 0x22, 0x21 }
162 };
163
164 outb(0xff, regio + 5);
165 clock = inw(regio + 5) & 1;
166
167 /*
168 * As with many controllers the address setup time is shared
169 * and must suit both devices if present.
170 */
171
172 addr = addr_timing[clock][pio];
173 if (pair) {
174 /* Hardware constraint */
175 u8 pair_addr = addr_timing[clock][pair->pio_mode - XFER_PIO_0];
176 if (pair_addr > addr)
177 addr = pair_addr;
178 }
179
180 /* Commence primary programming sequence */
181 opti_write_reg(ap, adev->devno, MISC_REG);
182 opti_write_reg(ap, data_rec_timing[clock][pio], READ_REG);
183 opti_write_reg(ap, data_rec_timing[clock][pio], WRITE_REG);
184 opti_write_reg(ap, addr, MISC_REG);
185
186 /* Programming sequence complete, override strapping */
187 opti_write_reg(ap, 0x85, CNTRL_REG);
188}
189
190static struct scsi_host_template opti_sht = {
191 .module = THIS_MODULE,
192 .name = DRV_NAME,
193 .ioctl = ata_scsi_ioctl,
194 .queuecommand = ata_scsi_queuecmd,
195 .can_queue = ATA_DEF_QUEUE,
196 .this_id = ATA_SHT_THIS_ID,
197 .sg_tablesize = LIBATA_MAX_PRD,
198 .max_sectors = ATA_MAX_SECTORS,
199 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
200 .emulated = ATA_SHT_EMULATED,
201 .use_clustering = ATA_SHT_USE_CLUSTERING,
202 .proc_name = DRV_NAME,
203 .dma_boundary = ATA_DMA_BOUNDARY,
204 .slave_configure = ata_scsi_slave_config,
205 .bios_param = ata_std_bios_param,
206};
207
208static struct ata_port_operations opti_port_ops = {
209 .port_disable = ata_port_disable,
210 .set_piomode = opti_set_piomode,
211/* .set_dmamode = opti_set_dmamode, */
212 .tf_load = ata_tf_load,
213 .tf_read = ata_tf_read,
214 .check_status = ata_check_status,
215 .exec_command = ata_exec_command,
216 .dev_select = ata_std_dev_select,
217
218 .freeze = ata_bmdma_freeze,
219 .thaw = ata_bmdma_thaw,
220 .error_handler = opti_error_handler,
221 .post_internal_cmd = ata_bmdma_post_internal_cmd,
222
223 .bmdma_setup = ata_bmdma_setup,
224 .bmdma_start = ata_bmdma_start,
225 .bmdma_stop = ata_bmdma_stop,
226 .bmdma_status = ata_bmdma_status,
227
228 .qc_prep = ata_qc_prep,
229 .qc_issue = ata_qc_issue_prot,
Jeff Garzikbda30282006-09-27 05:41:13 -0400230
Jeff Garzik669a5db2006-08-29 18:12:40 -0400231 .data_xfer = ata_pio_data_xfer,
232
233 .irq_handler = ata_interrupt,
234 .irq_clear = ata_bmdma_irq_clear,
235
236 .port_start = ata_port_start,
237 .port_stop = ata_port_stop,
238 .host_stop = ata_host_stop
239};
240
241static int opti_init_one(struct pci_dev *dev, const struct pci_device_id *id)
242{
243 static struct ata_port_info info = {
244 .sht = &opti_sht,
245 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
246 .pio_mask = 0x1f,
247 .port_ops = &opti_port_ops
248 };
249 static struct ata_port_info *port_info[2] = { &info, &info };
250 static int printed_version;
251
252 if (!printed_version++)
253 dev_printk(KERN_DEBUG, &dev->dev, "version " DRV_VERSION "\n");
254
255 return ata_pci_init_one(dev, port_info, 2);
256}
257
258static const struct pci_device_id opti[] = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400259 { PCI_VDEVICE(OPTI, PCI_DEVICE_ID_OPTI_82C621), 0 },
260 { PCI_VDEVICE(OPTI, PCI_DEVICE_ID_OPTI_82C825), 1 },
261
262 { },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400263};
264
265static struct pci_driver opti_pci_driver = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400266 .name = DRV_NAME,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400267 .id_table = opti,
268 .probe = opti_init_one,
269 .remove = ata_pci_remove_one
270};
271
272static int __init opti_init(void)
273{
274 return pci_register_driver(&opti_pci_driver);
275}
276
Jeff Garzik669a5db2006-08-29 18:12:40 -0400277static void __exit opti_exit(void)
278{
279 pci_unregister_driver(&opti_pci_driver);
280}
281
282
283MODULE_AUTHOR("Alan Cox");
284MODULE_DESCRIPTION("low-level driver for Opti 621/621X");
285MODULE_LICENSE("GPL");
286MODULE_DEVICE_TABLE(pci, opti);
287MODULE_VERSION(DRV_VERSION);
288
289module_init(opti_init);
290module_exit(opti_exit);