2 * pata_ns87410.c - National Semiconductor 87410 PATA for new ATA layer
4 * Alan Cox <alan@redhat.com>
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)
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.
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.
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>
30 #define DRV_NAME "pata_ns87410"
31 #define DRV_VERSION "0.4.2"
34 * ns87410_pre_reset - probe begin
37 * Set up cable type and use generic probe init
40 static int ns87410_pre_reset(struct ata_port *ap)
42 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
43 static const struct pci_bits ns87410_enable_bits[] = {
44 { 0x43, 1, 0x08, 0x08 },
45 { 0x47, 1, 0x08, 0x08 }
48 if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no]))
50 ap->cbl = ATA_CBL_PATA40;
51 return ata_std_prereset(ap);
55 * ns87410_error_handler - probe reset
58 * Perform the ATA probe and bus reset sequence plus specific handling
59 * for this hardware. The MPIIX has the enable bits in a different place
60 * to PIIX4 and friends. As a pure PIO device it has no cable detect
63 static void ns87410_error_handler(struct ata_port *ap)
65 ata_bmdma_drive_eh(ap, ns87410_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
69 * ns87410_set_piomode - set initial PIO mode data
73 * Program timing data. This is kept per channel not per device,
74 * and only affects the data port.
77 static void ns87410_set_piomode(struct ata_port *ap, struct ata_device *adev)
79 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
80 int port = 0x40 + 4 * ap->port_no;
84 static const u8 activebits[15] = {
90 static const u8 recoverbits[12] = {
91 0, 1, 2, 3, 4, 5, 6, 6, 7, 7, 7, 7
94 pci_read_config_byte(pdev, port + 3, &idefr);
96 if (ata_pio_need_iordy(adev))
97 idefr |= 0x04; /* IORDY enable */
101 if (ata_timing_compute(adev, adev->pio_mode, &at, 30303, 1) < 0) {
102 dev_printk(KERN_ERR, &pdev->dev, "unknown mode %d.\n", adev->pio_mode);
106 at.active = FIT(at.active, 2, 16) - 2;
107 at.setup = FIT(at.setup, 1, 4) - 1;
108 at.recover = FIT(at.recover, 1, 12) - 1;
110 idetcr = (at.setup << 6) | (recoverbits[at.recover] << 3) | activebits[at.active];
112 pci_write_config_byte(pdev, port, idetcr);
113 pci_write_config_byte(pdev, port + 3, idefr);
114 /* We use ap->private_data as a pointer to the device currently
116 ap->private_data = adev;
120 * ns87410_qc_issue_prot - command issue
121 * @qc: command pending
123 * Called when the libata layer is about to issue a command. We wrap
124 * this interface so that we can load the correct ATA timings if
128 static unsigned int ns87410_qc_issue_prot(struct ata_queued_cmd *qc)
130 struct ata_port *ap = qc->ap;
131 struct ata_device *adev = qc->dev;
133 /* If modes have been configured and the channel data is not loaded
134 then load it. We have to check if pio_mode is set as the core code
135 does not set adev->pio_mode to XFER_PIO_0 while probing as would be
138 if (adev->pio_mode && adev != ap->private_data)
139 ns87410_set_piomode(ap, adev);
141 return ata_qc_issue_prot(qc);
144 static struct scsi_host_template ns87410_sht = {
145 .module = THIS_MODULE,
147 .ioctl = ata_scsi_ioctl,
148 .queuecommand = ata_scsi_queuecmd,
149 .can_queue = ATA_DEF_QUEUE,
150 .this_id = ATA_SHT_THIS_ID,
151 .sg_tablesize = LIBATA_MAX_PRD,
152 .max_sectors = ATA_MAX_SECTORS,
153 .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,
159 .slave_destroy = ata_scsi_slave_destroy,
160 .bios_param = ata_std_bios_param,
163 static struct ata_port_operations ns87410_port_ops = {
164 .port_disable = ata_port_disable,
165 .set_piomode = ns87410_set_piomode,
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,
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,
178 .qc_prep = ata_qc_prep,
179 .qc_issue = ns87410_qc_issue_prot,
181 .data_xfer = ata_pio_data_xfer,
183 .irq_handler = ata_interrupt,
184 .irq_clear = ata_bmdma_irq_clear,
186 .port_start = ata_port_start,
187 .port_stop = ata_port_stop,
188 .host_stop = ata_host_stop
191 static int ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id)
193 static struct ata_port_info info = {
195 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
197 .port_ops = &ns87410_port_ops
199 static struct ata_port_info *port_info[2] = {&info, &info};
200 return ata_pci_init_one(dev, port_info, 2);
203 static const struct pci_device_id ns87410[] = {
204 { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87410), },
209 static struct pci_driver ns87410_pci_driver = {
212 .probe = ns87410_init_one,
213 .remove = ata_pci_remove_one
216 static int __init ns87410_init(void)
218 return pci_register_driver(&ns87410_pci_driver);
221 static void __exit ns87410_exit(void)
223 pci_unregister_driver(&ns87410_pci_driver);
226 MODULE_AUTHOR("Alan Cox");
227 MODULE_DESCRIPTION("low-level driver for Nat Semi 87410");
228 MODULE_LICENSE("GPL");
229 MODULE_DEVICE_TABLE(pci, ns87410);
230 MODULE_VERSION(DRV_VERSION);
232 module_init(ns87410_init);
233 module_exit(ns87410_exit);