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669a5db4 JG |
1 | /* |
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" | |
31 | #define DRV_VERSION "0.4.2" | |
32 | ||
33 | /** | |
34 | * ns87410_pre_reset - probe begin | |
35 | * @ap: ATA port | |
36 | * | |
37 | * Set up cable type and use generic probe init | |
38 | */ | |
39 | ||
40 | static int ns87410_pre_reset(struct ata_port *ap) | |
41 | { | |
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 } | |
46 | }; | |
47 | ||
c961922b AC |
48 | if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no])) |
49 | return -ENOENT; | |
669a5db4 JG |
50 | ap->cbl = ATA_CBL_PATA40; |
51 | return ata_std_prereset(ap); | |
52 | } | |
53 | ||
54 | /** | |
55 | * ns87410_error_handler - probe reset | |
56 | * @ap: ATA port | |
57 | * | |
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 | |
61 | */ | |
62 | ||
63 | static void ns87410_error_handler(struct ata_port *ap) | |
64 | { | |
65 | ata_bmdma_drive_eh(ap, ns87410_pre_reset, ata_std_softreset, NULL, ata_std_postreset); | |
66 | } | |
67 | ||
68 | /** | |
69 | * ns87410_set_piomode - set initial PIO mode data | |
70 | * @ap: ATA interface | |
71 | * @adev: ATA device | |
72 | * | |
73 | * Program timing data. This is kept per channel not per device, | |
74 | * and only affects the data port. | |
75 | */ | |
76 | ||
77 | static void ns87410_set_piomode(struct ata_port *ap, struct ata_device *adev) | |
78 | { | |
79 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
80 | int port = 0x40 + 4 * ap->port_no; | |
81 | u8 idetcr, idefr; | |
82 | struct ata_timing at; | |
83 | ||
84 | static const u8 activebits[15] = { | |
85 | 0, 1, 2, 3, 4, | |
86 | 5, 5, 6, 6, 6, | |
87 | 6, 7, 7, 7, 7 | |
88 | }; | |
89 | ||
90 | static const u8 recoverbits[12] = { | |
91 | 0, 1, 2, 3, 4, 5, 6, 6, 7, 7, 7, 7 | |
92 | }; | |
93 | ||
94 | pci_read_config_byte(pdev, port + 3, &idefr); | |
95 | ||
96 | if (ata_pio_need_iordy(adev)) | |
97 | idefr |= 0x04; /* IORDY enable */ | |
98 | else | |
99 | idefr &= ~0x04; | |
100 | ||
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); | |
103 | return; | |
104 | } | |
105 | ||
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; | |
109 | ||
110 | idetcr = (at.setup << 6) | (recoverbits[at.recover] << 3) | activebits[at.active]; | |
111 | ||
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 | |
115 | loaded for timing */ | |
116 | ap->private_data = adev; | |
117 | } | |
118 | ||
119 | /** | |
120 | * ns87410_qc_issue_prot - command issue | |
121 | * @qc: command pending | |
122 | * | |
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 | |
125 | * neccessary. | |
126 | */ | |
127 | ||
128 | static unsigned int ns87410_qc_issue_prot(struct ata_queued_cmd *qc) | |
129 | { | |
130 | struct ata_port *ap = qc->ap; | |
131 | struct ata_device *adev = qc->dev; | |
132 | ||
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 | |
136 | logical */ | |
137 | ||
138 | if (adev->pio_mode && adev != ap->private_data) | |
139 | ns87410_set_piomode(ap, adev); | |
140 | ||
141 | return ata_qc_issue_prot(qc); | |
142 | } | |
143 | ||
144 | static struct scsi_host_template ns87410_sht = { | |
145 | .module = THIS_MODULE, | |
146 | .name = DRV_NAME, | |
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, | |
afdfe899 | 159 | .slave_destroy = ata_scsi_slave_destroy, |
669a5db4 JG |
160 | .bios_param = ata_std_bios_param, |
161 | }; | |
162 | ||
163 | static 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, | |
177 | ||
178 | .qc_prep = ata_qc_prep, | |
179 | .qc_issue = ns87410_qc_issue_prot, | |
bda30288 | 180 | |
669a5db4 JG |
181 | .data_xfer = ata_pio_data_xfer, |
182 | ||
183 | .irq_handler = ata_interrupt, | |
184 | .irq_clear = ata_bmdma_irq_clear, | |
185 | ||
186 | .port_start = ata_port_start, | |
187 | .port_stop = ata_port_stop, | |
188 | .host_stop = ata_host_stop | |
189 | }; | |
190 | ||
191 | static int ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id) | |
192 | { | |
193 | static struct ata_port_info info = { | |
194 | .sht = &ns87410_sht, | |
195 | .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, | |
196 | .pio_mask = 0x0F, | |
197 | .port_ops = &ns87410_port_ops | |
198 | }; | |
199 | static struct ata_port_info *port_info[2] = {&info, &info}; | |
200 | return ata_pci_init_one(dev, port_info, 2); | |
201 | } | |
202 | ||
203 | static const struct pci_device_id ns87410[] = { | |
2d2744fc JG |
204 | { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87410), }, |
205 | ||
206 | { }, | |
669a5db4 JG |
207 | }; |
208 | ||
209 | static struct pci_driver ns87410_pci_driver = { | |
2d2744fc | 210 | .name = DRV_NAME, |
669a5db4 JG |
211 | .id_table = ns87410, |
212 | .probe = ns87410_init_one, | |
213 | .remove = ata_pci_remove_one | |
214 | }; | |
215 | ||
216 | static int __init ns87410_init(void) | |
217 | { | |
218 | return pci_register_driver(&ns87410_pci_driver); | |
219 | } | |
220 | ||
669a5db4 JG |
221 | static void __exit ns87410_exit(void) |
222 | { | |
223 | pci_unregister_driver(&ns87410_pci_driver); | |
224 | } | |
225 | ||
669a5db4 JG |
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); | |
231 | ||
232 | module_init(ns87410_init); | |
233 | module_exit(ns87410_exit); |