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669a5db4 JG |
1 | /* |
2 | * pata_oldpiix.c - Intel PATA/SATA controllers | |
3 | * | |
4 | * (C) 2005 Red Hat <alan@redhat.com> | |
5 | * | |
6 | * Some parts based on ata_piix.c by Jeff Garzik and others. | |
7 | * | |
8 | * Early PIIX differs significantly from the later PIIX as it lacks | |
9 | * SITRE and the slave timing registers. This means that you have to | |
10 | * set timing per channel, or be clever. Libata tells us whenever it | |
11 | * does drive selection and we use this to reload the timings. | |
12 | * | |
13 | * Because of these behaviour differences PIIX gets its own driver module. | |
14 | */ | |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/pci.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/blkdev.h> | |
21 | #include <linux/delay.h> | |
22 | #include <linux/device.h> | |
23 | #include <scsi/scsi_host.h> | |
24 | #include <linux/libata.h> | |
25 | #include <linux/ata.h> | |
26 | ||
27 | #define DRV_NAME "pata_oldpiix" | |
a0fcdc02 | 28 | #define DRV_VERSION "0.5.5" |
669a5db4 JG |
29 | |
30 | /** | |
31 | * oldpiix_pre_reset - probe begin | |
32 | * @ap: ATA port | |
33 | * | |
34 | * Set up cable type and use generic probe init | |
35 | */ | |
36 | ||
37 | static int oldpiix_pre_reset(struct ata_port *ap) | |
38 | { | |
39 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
40 | static const struct pci_bits oldpiix_enable_bits[] = { | |
41 | { 0x41U, 1U, 0x80UL, 0x80UL }, /* port 0 */ | |
42 | { 0x43U, 1U, 0x80UL, 0x80UL }, /* port 1 */ | |
43 | }; | |
44 | ||
c961922b AC |
45 | if (!pci_test_config_bits(pdev, &oldpiix_enable_bits[ap->port_no])) |
46 | return -ENOENT; | |
669a5db4 JG |
47 | return ata_std_prereset(ap); |
48 | } | |
49 | ||
50 | /** | |
51 | * oldpiix_pata_error_handler - Probe specified port on PATA host controller | |
52 | * @ap: Port to probe | |
53 | * @classes: | |
54 | * | |
55 | * LOCKING: | |
56 | * None (inherited from caller). | |
57 | */ | |
58 | ||
59 | static void oldpiix_pata_error_handler(struct ata_port *ap) | |
60 | { | |
61 | ata_bmdma_drive_eh(ap, oldpiix_pre_reset, ata_std_softreset, NULL, ata_std_postreset); | |
62 | } | |
63 | ||
64 | /** | |
65 | * oldpiix_set_piomode - Initialize host controller PATA PIO timings | |
66 | * @ap: Port whose timings we are configuring | |
a0fcdc02 | 67 | * @adev: Device whose timings we are configuring |
669a5db4 JG |
68 | * |
69 | * Set PIO mode for device, in host controller PCI config space. | |
70 | * | |
71 | * LOCKING: | |
72 | * None (inherited from caller). | |
73 | */ | |
74 | ||
75 | static void oldpiix_set_piomode (struct ata_port *ap, struct ata_device *adev) | |
76 | { | |
77 | unsigned int pio = adev->pio_mode - XFER_PIO_0; | |
78 | struct pci_dev *dev = to_pci_dev(ap->host->dev); | |
79 | unsigned int idetm_port= ap->port_no ? 0x42 : 0x40; | |
80 | u16 idetm_data; | |
81 | int control = 0; | |
82 | ||
83 | /* | |
84 | * See Intel Document 298600-004 for the timing programing rules | |
85 | * for PIIX/ICH. Note that the early PIIX does not have the slave | |
86 | * timing port at 0x44. | |
87 | */ | |
88 | ||
89 | static const /* ISP RTC */ | |
90 | u8 timings[][2] = { { 0, 0 }, | |
91 | { 0, 0 }, | |
92 | { 1, 0 }, | |
93 | { 2, 1 }, | |
94 | { 2, 3 }, }; | |
95 | ||
409ba47c SS |
96 | if (pio > 1) |
97 | control |= 1; /* TIME */ | |
669a5db4 | 98 | if (ata_pio_need_iordy(adev)) |
409ba47c | 99 | control |= 2; /* IE */ |
669a5db4 | 100 | |
409ba47c | 101 | /* Intel specifies that the prefetch/posting is for disk only */ |
669a5db4 | 102 | if (adev->class == ATA_DEV_ATA) |
409ba47c | 103 | control |= 4; /* PPE */ |
669a5db4 JG |
104 | |
105 | pci_read_config_word(dev, idetm_port, &idetm_data); | |
106 | ||
409ba47c SS |
107 | /* |
108 | * Set PPE, IE and TIME as appropriate. | |
109 | * Clear the other drive's timing bits. | |
110 | */ | |
669a5db4 JG |
111 | if (adev->devno == 0) { |
112 | idetm_data &= 0xCCE0; | |
113 | idetm_data |= control; | |
114 | } else { | |
115 | idetm_data &= 0xCC0E; | |
116 | idetm_data |= (control << 4); | |
117 | } | |
118 | idetm_data |= (timings[pio][0] << 12) | | |
119 | (timings[pio][1] << 8); | |
120 | pci_write_config_word(dev, idetm_port, idetm_data); | |
121 | ||
122 | /* Track which port is configured */ | |
123 | ap->private_data = adev; | |
124 | } | |
125 | ||
126 | /** | |
127 | * oldpiix_set_dmamode - Initialize host controller PATA DMA timings | |
128 | * @ap: Port whose timings we are configuring | |
129 | * @adev: Device to program | |
130 | * @isich: True if the device is an ICH and has IOCFG registers | |
131 | * | |
132 | * Set MWDMA mode for device, in host controller PCI config space. | |
133 | * | |
134 | * LOCKING: | |
135 | * None (inherited from caller). | |
136 | */ | |
137 | ||
138 | static void oldpiix_set_dmamode (struct ata_port *ap, struct ata_device *adev) | |
139 | { | |
140 | struct pci_dev *dev = to_pci_dev(ap->host->dev); | |
141 | u8 idetm_port = ap->port_no ? 0x42 : 0x40; | |
142 | u16 idetm_data; | |
143 | ||
144 | static const /* ISP RTC */ | |
145 | u8 timings[][2] = { { 0, 0 }, | |
146 | { 0, 0 }, | |
147 | { 1, 0 }, | |
148 | { 2, 1 }, | |
149 | { 2, 3 }, }; | |
150 | ||
151 | /* | |
152 | * MWDMA is driven by the PIO timings. We must also enable | |
153 | * IORDY unconditionally along with TIME1. PPE has already | |
154 | * been set when the PIO timing was set. | |
155 | */ | |
156 | ||
157 | unsigned int mwdma = adev->dma_mode - XFER_MW_DMA_0; | |
158 | unsigned int control; | |
159 | const unsigned int needed_pio[3] = { | |
160 | XFER_PIO_0, XFER_PIO_3, XFER_PIO_4 | |
161 | }; | |
162 | int pio = needed_pio[mwdma] - XFER_PIO_0; | |
163 | ||
164 | pci_read_config_word(dev, idetm_port, &idetm_data); | |
165 | ||
166 | control = 3; /* IORDY|TIME0 */ | |
167 | /* Intel specifies that the PPE functionality is for disk only */ | |
168 | if (adev->class == ATA_DEV_ATA) | |
169 | control |= 4; /* PPE enable */ | |
170 | ||
171 | /* If the drive MWDMA is faster than it can do PIO then | |
172 | we must force PIO into PIO0 */ | |
173 | ||
174 | if (adev->pio_mode < needed_pio[mwdma]) | |
175 | /* Enable DMA timing only */ | |
176 | control |= 8; /* PIO cycles in PIO0 */ | |
177 | ||
178 | /* Mask out the relevant control and timing bits we will load. Also | |
179 | clear the other drive TIME register as a precaution */ | |
180 | if (adev->devno == 0) { | |
181 | idetm_data &= 0xCCE0; | |
182 | idetm_data |= control; | |
183 | } else { | |
184 | idetm_data &= 0xCC0E; | |
185 | idetm_data |= (control << 4); | |
186 | } | |
187 | idetm_data |= (timings[pio][0] << 12) | (timings[pio][1] << 8); | |
188 | pci_write_config_word(dev, idetm_port, idetm_data); | |
189 | ||
190 | /* Track which port is configured */ | |
191 | ap->private_data = adev; | |
192 | } | |
193 | ||
194 | /** | |
195 | * oldpiix_qc_issue_prot - command issue | |
196 | * @qc: command pending | |
197 | * | |
198 | * Called when the libata layer is about to issue a command. We wrap | |
199 | * this interface so that we can load the correct ATA timings if | |
200 | * neccessary. Our logic also clears TIME0/TIME1 for the other device so | |
201 | * that, even if we get this wrong, cycles to the other device will | |
202 | * be made PIO0. | |
203 | */ | |
204 | ||
205 | static unsigned int oldpiix_qc_issue_prot(struct ata_queued_cmd *qc) | |
206 | { | |
207 | struct ata_port *ap = qc->ap; | |
208 | struct ata_device *adev = qc->dev; | |
209 | ||
210 | if (adev != ap->private_data) { | |
b7939b14 | 211 | oldpiix_set_piomode(ap, adev); |
669a5db4 JG |
212 | if (adev->dma_mode) |
213 | oldpiix_set_dmamode(ap, adev); | |
669a5db4 JG |
214 | } |
215 | return ata_qc_issue_prot(qc); | |
216 | } | |
217 | ||
218 | ||
219 | static struct scsi_host_template oldpiix_sht = { | |
220 | .module = THIS_MODULE, | |
221 | .name = DRV_NAME, | |
222 | .ioctl = ata_scsi_ioctl, | |
223 | .queuecommand = ata_scsi_queuecmd, | |
224 | .can_queue = ATA_DEF_QUEUE, | |
225 | .this_id = ATA_SHT_THIS_ID, | |
226 | .sg_tablesize = LIBATA_MAX_PRD, | |
669a5db4 JG |
227 | .cmd_per_lun = ATA_SHT_CMD_PER_LUN, |
228 | .emulated = ATA_SHT_EMULATED, | |
229 | .use_clustering = ATA_SHT_USE_CLUSTERING, | |
230 | .proc_name = DRV_NAME, | |
231 | .dma_boundary = ATA_DMA_BOUNDARY, | |
232 | .slave_configure = ata_scsi_slave_config, | |
afdfe899 | 233 | .slave_destroy = ata_scsi_slave_destroy, |
669a5db4 | 234 | .bios_param = ata_std_bios_param, |
438ac6d5 | 235 | #ifdef CONFIG_PM |
30ced0f0 A |
236 | .resume = ata_scsi_device_resume, |
237 | .suspend = ata_scsi_device_suspend, | |
438ac6d5 | 238 | #endif |
669a5db4 JG |
239 | }; |
240 | ||
241 | static const struct ata_port_operations oldpiix_pata_ops = { | |
242 | .port_disable = ata_port_disable, | |
243 | .set_piomode = oldpiix_set_piomode, | |
244 | .set_dmamode = oldpiix_set_dmamode, | |
245 | .mode_filter = ata_pci_default_filter, | |
246 | ||
247 | .tf_load = ata_tf_load, | |
248 | .tf_read = ata_tf_read, | |
249 | .check_status = ata_check_status, | |
250 | .exec_command = ata_exec_command, | |
251 | .dev_select = ata_std_dev_select, | |
252 | ||
253 | .freeze = ata_bmdma_freeze, | |
254 | .thaw = ata_bmdma_thaw, | |
255 | .error_handler = oldpiix_pata_error_handler, | |
256 | .post_internal_cmd = ata_bmdma_post_internal_cmd, | |
a0fcdc02 | 257 | .cable_detect = ata_cable_40wire, |
669a5db4 JG |
258 | |
259 | .bmdma_setup = ata_bmdma_setup, | |
260 | .bmdma_start = ata_bmdma_start, | |
261 | .bmdma_stop = ata_bmdma_stop, | |
262 | .bmdma_status = ata_bmdma_status, | |
263 | .qc_prep = ata_qc_prep, | |
264 | .qc_issue = oldpiix_qc_issue_prot, | |
0d5ff566 | 265 | .data_xfer = ata_data_xfer, |
669a5db4 JG |
266 | |
267 | .irq_handler = ata_interrupt, | |
268 | .irq_clear = ata_bmdma_irq_clear, | |
246ce3b6 AI |
269 | .irq_on = ata_irq_on, |
270 | .irq_ack = ata_irq_ack, | |
669a5db4 JG |
271 | |
272 | .port_start = ata_port_start, | |
669a5db4 JG |
273 | }; |
274 | ||
275 | ||
276 | /** | |
277 | * oldpiix_init_one - Register PIIX ATA PCI device with kernel services | |
278 | * @pdev: PCI device to register | |
279 | * @ent: Entry in oldpiix_pci_tbl matching with @pdev | |
280 | * | |
281 | * Called from kernel PCI layer. We probe for combined mode (sigh), | |
282 | * and then hand over control to libata, for it to do the rest. | |
283 | * | |
284 | * LOCKING: | |
285 | * Inherited from PCI layer (may sleep). | |
286 | * | |
287 | * RETURNS: | |
288 | * Zero on success, or -ERRNO value. | |
289 | */ | |
290 | ||
291 | static int oldpiix_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) | |
292 | { | |
293 | static int printed_version; | |
294 | static struct ata_port_info info = { | |
295 | .sht = &oldpiix_sht, | |
296 | .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, | |
297 | .pio_mask = 0x1f, /* pio0-4 */ | |
298 | .mwdma_mask = 0x07, /* mwdma1-2 */ | |
299 | .port_ops = &oldpiix_pata_ops, | |
300 | }; | |
301 | static struct ata_port_info *port_info[2] = { &info, &info }; | |
302 | ||
303 | if (!printed_version++) | |
304 | dev_printk(KERN_DEBUG, &pdev->dev, | |
305 | "version " DRV_VERSION "\n"); | |
306 | ||
307 | return ata_pci_init_one(pdev, port_info, 2); | |
308 | } | |
309 | ||
310 | static const struct pci_device_id oldpiix_pci_tbl[] = { | |
2d2744fc JG |
311 | { PCI_VDEVICE(INTEL, 0x1230), }, |
312 | ||
669a5db4 JG |
313 | { } /* terminate list */ |
314 | }; | |
315 | ||
316 | static struct pci_driver oldpiix_pci_driver = { | |
317 | .name = DRV_NAME, | |
318 | .id_table = oldpiix_pci_tbl, | |
319 | .probe = oldpiix_init_one, | |
320 | .remove = ata_pci_remove_one, | |
438ac6d5 | 321 | #ifdef CONFIG_PM |
30ced0f0 A |
322 | .suspend = ata_pci_device_suspend, |
323 | .resume = ata_pci_device_resume, | |
438ac6d5 | 324 | #endif |
669a5db4 JG |
325 | }; |
326 | ||
327 | static int __init oldpiix_init(void) | |
328 | { | |
329 | return pci_register_driver(&oldpiix_pci_driver); | |
330 | } | |
331 | ||
332 | static void __exit oldpiix_exit(void) | |
333 | { | |
334 | pci_unregister_driver(&oldpiix_pci_driver); | |
335 | } | |
336 | ||
669a5db4 JG |
337 | module_init(oldpiix_init); |
338 | module_exit(oldpiix_exit); | |
339 | ||
340 | MODULE_AUTHOR("Alan Cox"); | |
341 | MODULE_DESCRIPTION("SCSI low-level driver for early PIIX series controllers"); | |
342 | MODULE_LICENSE("GPL"); | |
343 | MODULE_DEVICE_TABLE(pci, oldpiix_pci_tbl); | |
344 | MODULE_VERSION(DRV_VERSION); | |
345 |