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Jeff Garzik669a5db2006-08-29 18:12:40 -04001/*
2 * pata_ns87410.c - National Semiconductor 87410 PATA for new ATA layer
3 * (C) 2006 Red Hat Inc
4 * Alan Cox <alan@redhat.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21#include <linux/kernel.h>
22#include <linux/module.h>
23#include <linux/pci.h>
24#include <linux/init.h>
25#include <linux/blkdev.h>
26#include <linux/delay.h>
27#include <scsi/scsi_host.h>
28#include <linux/libata.h>
29
30#define DRV_NAME "pata_ns87410"
Jeff Garzika0fcdc02007-03-09 07:24:15 -050031#define DRV_VERSION "0.4.6"
Jeff Garzik669a5db2006-08-29 18:12:40 -040032
33/**
34 * ns87410_pre_reset - probe begin
35 * @ap: ATA port
Tejun Heod4b2bab2007-02-02 16:50:52 +090036 * @deadline: deadline jiffies for the operation
Jeff Garzik669a5db2006-08-29 18:12:40 -040037 *
Jeff Garzika0fcdc02007-03-09 07:24:15 -050038 * Check enabled ports
Jeff Garzik669a5db2006-08-29 18:12:40 -040039 */
40
Tejun Heod4b2bab2007-02-02 16:50:52 +090041static int ns87410_pre_reset(struct ata_port *ap, unsigned long deadline)
Jeff Garzik669a5db2006-08-29 18:12:40 -040042{
43 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
44 static const struct pci_bits ns87410_enable_bits[] = {
45 { 0x43, 1, 0x08, 0x08 },
46 { 0x47, 1, 0x08, 0x08 }
47 };
48
Alan Coxc9619222006-09-26 17:53:38 +010049 if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no]))
50 return -ENOENT;
Tejun Heod4b2bab2007-02-02 16:50:52 +090051
52 return ata_std_prereset(ap, deadline);
Jeff Garzik669a5db2006-08-29 18:12:40 -040053}
54
55/**
56 * ns87410_error_handler - probe reset
57 * @ap: ATA port
58 *
59 * Perform the ATA probe and bus reset sequence plus specific handling
60 * for this hardware. The MPIIX has the enable bits in a different place
61 * to PIIX4 and friends. As a pure PIO device it has no cable detect
62 */
63
64static void ns87410_error_handler(struct ata_port *ap)
65{
66 ata_bmdma_drive_eh(ap, ns87410_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
67}
68
69/**
70 * ns87410_set_piomode - set initial PIO mode data
71 * @ap: ATA interface
72 * @adev: ATA device
73 *
74 * Program timing data. This is kept per channel not per device,
75 * and only affects the data port.
76 */
77
78static void ns87410_set_piomode(struct ata_port *ap, struct ata_device *adev)
79{
80 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
81 int port = 0x40 + 4 * ap->port_no;
82 u8 idetcr, idefr;
83 struct ata_timing at;
84
85 static const u8 activebits[15] = {
86 0, 1, 2, 3, 4,
87 5, 5, 6, 6, 6,
88 6, 7, 7, 7, 7
89 };
90
91 static const u8 recoverbits[12] = {
92 0, 1, 2, 3, 4, 5, 6, 6, 7, 7, 7, 7
93 };
94
95 pci_read_config_byte(pdev, port + 3, &idefr);
96
97 if (ata_pio_need_iordy(adev))
98 idefr |= 0x04; /* IORDY enable */
99 else
100 idefr &= ~0x04;
101
102 if (ata_timing_compute(adev, adev->pio_mode, &at, 30303, 1) < 0) {
103 dev_printk(KERN_ERR, &pdev->dev, "unknown mode %d.\n", adev->pio_mode);
104 return;
105 }
106
107 at.active = FIT(at.active, 2, 16) - 2;
108 at.setup = FIT(at.setup, 1, 4) - 1;
109 at.recover = FIT(at.recover, 1, 12) - 1;
110
111 idetcr = (at.setup << 6) | (recoverbits[at.recover] << 3) | activebits[at.active];
112
113 pci_write_config_byte(pdev, port, idetcr);
114 pci_write_config_byte(pdev, port + 3, idefr);
115 /* We use ap->private_data as a pointer to the device currently
116 loaded for timing */
117 ap->private_data = adev;
118}
119
120/**
121 * ns87410_qc_issue_prot - command issue
122 * @qc: command pending
123 *
124 * Called when the libata layer is about to issue a command. We wrap
125 * this interface so that we can load the correct ATA timings if
126 * neccessary.
127 */
128
129static unsigned int ns87410_qc_issue_prot(struct ata_queued_cmd *qc)
130{
131 struct ata_port *ap = qc->ap;
132 struct ata_device *adev = qc->dev;
133
134 /* If modes have been configured and the channel data is not loaded
135 then load it. We have to check if pio_mode is set as the core code
136 does not set adev->pio_mode to XFER_PIO_0 while probing as would be
137 logical */
138
139 if (adev->pio_mode && adev != ap->private_data)
140 ns87410_set_piomode(ap, adev);
141
142 return ata_qc_issue_prot(qc);
143}
144
145static struct scsi_host_template ns87410_sht = {
146 .module = THIS_MODULE,
147 .name = DRV_NAME,
148 .ioctl = ata_scsi_ioctl,
149 .queuecommand = ata_scsi_queuecmd,
150 .can_queue = ATA_DEF_QUEUE,
151 .this_id = ATA_SHT_THIS_ID,
152 .sg_tablesize = LIBATA_MAX_PRD,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400153 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
154 .emulated = ATA_SHT_EMULATED,
155 .use_clustering = ATA_SHT_USE_CLUSTERING,
156 .proc_name = DRV_NAME,
157 .dma_boundary = ATA_DMA_BOUNDARY,
158 .slave_configure = ata_scsi_slave_config,
Tejun Heoafdfe892006-11-29 11:26:47 +0900159 .slave_destroy = ata_scsi_slave_destroy,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400160 .bios_param = ata_std_bios_param,
161};
162
163static struct ata_port_operations ns87410_port_ops = {
164 .port_disable = ata_port_disable,
165 .set_piomode = ns87410_set_piomode,
166
167 .tf_load = ata_tf_load,
168 .tf_read = ata_tf_read,
169 .check_status = ata_check_status,
170 .exec_command = ata_exec_command,
171 .dev_select = ata_std_dev_select,
172
173 .freeze = ata_bmdma_freeze,
174 .thaw = ata_bmdma_thaw,
175 .error_handler = ns87410_error_handler,
176 .post_internal_cmd = ata_bmdma_post_internal_cmd,
Jeff Garzika0fcdc02007-03-09 07:24:15 -0500177 .cable_detect = ata_cable_40wire,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400178
179 .qc_prep = ata_qc_prep,
180 .qc_issue = ns87410_qc_issue_prot,
Jeff Garzikbda30282006-09-27 05:41:13 -0400181
Tejun Heo0d5ff562007-02-01 15:06:36 +0900182 .data_xfer = ata_data_xfer,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400183
184 .irq_handler = ata_interrupt,
185 .irq_clear = ata_bmdma_irq_clear,
Akira Iguchi246ce3b2007-01-26 16:27:58 +0900186 .irq_on = ata_irq_on,
187 .irq_ack = ata_irq_ack,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400188
189 .port_start = ata_port_start,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400190};
191
192static int ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id)
193{
Tejun Heo1626aeb2007-05-04 12:43:58 +0200194 static const struct ata_port_info info = {
Jeff Garzik669a5db2006-08-29 18:12:40 -0400195 .sht = &ns87410_sht,
196 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
197 .pio_mask = 0x0F,
198 .port_ops = &ns87410_port_ops
199 };
Tejun Heo1626aeb2007-05-04 12:43:58 +0200200 const struct ata_port_info *ppi[] = { &info, NULL };
201 return ata_pci_init_one(dev, ppi);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400202}
203
204static const struct pci_device_id ns87410[] = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400205 { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87410), },
206
207 { },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400208};
209
210static struct pci_driver ns87410_pci_driver = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400211 .name = DRV_NAME,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400212 .id_table = ns87410,
213 .probe = ns87410_init_one,
Alan30ced0f2006-11-22 16:57:36 +0000214 .remove = ata_pci_remove_one,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900215#ifdef CONFIG_PM
Alan30ced0f2006-11-22 16:57:36 +0000216 .suspend = ata_pci_device_suspend,
217 .resume = ata_pci_device_resume,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900218#endif
Jeff Garzik669a5db2006-08-29 18:12:40 -0400219};
220
221static int __init ns87410_init(void)
222{
223 return pci_register_driver(&ns87410_pci_driver);
224}
225
Jeff Garzik669a5db2006-08-29 18:12:40 -0400226static void __exit ns87410_exit(void)
227{
228 pci_unregister_driver(&ns87410_pci_driver);
229}
230
Jeff Garzik669a5db2006-08-29 18:12:40 -0400231MODULE_AUTHOR("Alan Cox");
232MODULE_DESCRIPTION("low-level driver for Nat Semi 87410");
233MODULE_LICENSE("GPL");
234MODULE_DEVICE_TABLE(pci, ns87410);
235MODULE_VERSION(DRV_VERSION);
236
237module_init(ns87410_init);
238module_exit(ns87410_exit);