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669a5db4 JG |
1 | /* |
2 | * pata_radisys.c - Intel PATA/SATA controllers | |
3 | * | |
4 | * (C) 2006 Red Hat <alan@redhat.com> | |
5 | * | |
6 | * Some parts based on ata_piix.c by Jeff Garzik and others. | |
7 | * | |
8 | * A PIIX relative, this device has a single ATA channel and no | |
9 | * slave timings, SITRE or PPE. In that sense it is a close relative | |
10 | * of the original PIIX. It does however support UDMA 33/66 per channel | |
11 | * although no other modes/timings. Also lacking is 32bit I/O on the ATA | |
12 | * port. | |
13 | */ | |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/pci.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/blkdev.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/device.h> | |
22 | #include <scsi/scsi_host.h> | |
23 | #include <linux/libata.h> | |
24 | #include <linux/ata.h> | |
25 | ||
26 | #define DRV_NAME "pata_radisys" | |
27 | #define DRV_VERSION "0.4.1" | |
28 | ||
29 | /** | |
30 | * radisys_probe_init - probe begin | |
31 | * @ap: ATA port | |
32 | * | |
33 | * Set up cable type and use generic probe init | |
34 | */ | |
85cd7251 | 35 | |
669a5db4 JG |
36 | static int radisys_pre_reset(struct ata_port *ap) |
37 | { | |
38 | ap->cbl = ATA_CBL_PATA80; | |
39 | return ata_std_prereset(ap); | |
40 | } | |
41 | ||
42 | ||
43 | /** | |
44 | * radisys_pata_error_handler - Probe specified port on PATA host controller | |
45 | * @ap: Port to probe | |
46 | * @classes: | |
47 | * | |
48 | * LOCKING: | |
49 | * None (inherited from caller). | |
50 | */ | |
51 | ||
52 | static void radisys_pata_error_handler(struct ata_port *ap) | |
53 | { | |
54 | ata_bmdma_drive_eh(ap, radisys_pre_reset, ata_std_softreset, NULL, ata_std_postreset); | |
55 | } | |
56 | ||
57 | /** | |
58 | * radisys_set_piomode - Initialize host controller PATA PIO timings | |
59 | * @ap: Port whose timings we are configuring | |
60 | * @adev: um | |
61 | * | |
62 | * Set PIO mode for device, in host controller PCI config space. | |
63 | * | |
64 | * LOCKING: | |
65 | * None (inherited from caller). | |
66 | */ | |
67 | ||
68 | static void radisys_set_piomode (struct ata_port *ap, struct ata_device *adev) | |
69 | { | |
70 | unsigned int pio = adev->pio_mode - XFER_PIO_0; | |
71 | struct pci_dev *dev = to_pci_dev(ap->host->dev); | |
72 | u16 idetm_data; | |
73 | int control = 0; | |
74 | ||
75 | /* | |
76 | * See Intel Document 298600-004 for the timing programing rules | |
77 | * for PIIX/ICH. Note that the early PIIX does not have the slave | |
78 | * timing port at 0x44. The Radisys is a relative of the PIIX | |
79 | * but not the same so be careful. | |
80 | */ | |
81 | ||
82 | static const /* ISP RTC */ | |
83 | u8 timings[][2] = { { 0, 0 }, /* Check me */ | |
84 | { 0, 0 }, | |
85 | { 1, 1 }, | |
86 | { 2, 2 }, | |
87 | { 3, 3 }, }; | |
88 | ||
89 | if (pio > 0) | |
90 | control |= 1; /* TIME1 enable */ | |
91 | if (ata_pio_need_iordy(adev)) | |
92 | control |= 2; /* IE IORDY */ | |
93 | ||
94 | pci_read_config_word(dev, 0x40, &idetm_data); | |
95 | ||
96 | /* Enable IE and TIME as appropriate. Clear the other | |
97 | drive timing bits */ | |
98 | idetm_data &= 0xCCCC; | |
99 | idetm_data |= (control << (4 * adev->devno)); | |
100 | idetm_data |= (timings[pio][0] << 12) | | |
101 | (timings[pio][1] << 8); | |
102 | pci_write_config_word(dev, 0x40, idetm_data); | |
103 | ||
104 | /* Track which port is configured */ | |
105 | ap->private_data = adev; | |
106 | } | |
107 | ||
108 | /** | |
109 | * radisys_set_dmamode - Initialize host controller PATA DMA timings | |
110 | * @ap: Port whose timings we are configuring | |
111 | * @adev: Device to program | |
112 | * @isich: True if the device is an ICH and has IOCFG registers | |
113 | * | |
114 | * Set MWDMA mode for device, in host controller PCI config space. | |
115 | * | |
116 | * LOCKING: | |
117 | * None (inherited from caller). | |
118 | */ | |
119 | ||
120 | static void radisys_set_dmamode (struct ata_port *ap, struct ata_device *adev) | |
121 | { | |
122 | struct pci_dev *dev = to_pci_dev(ap->host->dev); | |
123 | u16 idetm_data; | |
124 | u8 udma_enable; | |
85cd7251 | 125 | |
669a5db4 JG |
126 | static const /* ISP RTC */ |
127 | u8 timings[][2] = { { 0, 0 }, | |
128 | { 0, 0 }, | |
129 | { 1, 1 }, | |
130 | { 2, 2 }, | |
131 | { 3, 3 }, }; | |
132 | ||
133 | /* | |
134 | * MWDMA is driven by the PIO timings. We must also enable | |
135 | * IORDY unconditionally. | |
136 | */ | |
137 | ||
138 | pci_read_config_word(dev, 0x40, &idetm_data); | |
139 | pci_read_config_byte(dev, 0x48, &udma_enable); | |
140 | ||
141 | if (adev->dma_mode < XFER_UDMA_0) { | |
142 | unsigned int mwdma = adev->dma_mode - XFER_MW_DMA_0; | |
143 | const unsigned int needed_pio[3] = { | |
144 | XFER_PIO_0, XFER_PIO_3, XFER_PIO_4 | |
145 | }; | |
146 | int pio = needed_pio[mwdma] - XFER_PIO_0; | |
147 | int control = 3; /* IORDY|TIME0 */ | |
148 | ||
149 | /* If the drive MWDMA is faster than it can do PIO then | |
150 | we must force PIO0 for PIO cycles. */ | |
151 | ||
152 | if (adev->pio_mode < needed_pio[mwdma]) | |
153 | control = 1; | |
154 | ||
155 | /* Mask out the relevant control and timing bits we will load. Also | |
156 | clear the other drive TIME register as a precaution */ | |
85cd7251 | 157 | |
669a5db4 JG |
158 | idetm_data &= 0xCCCC; |
159 | idetm_data |= control << (4 * adev->devno); | |
160 | idetm_data |= (timings[pio][0] << 12) | (timings[pio][1] << 8); | |
161 | ||
162 | udma_enable &= ~(1 << adev->devno); | |
163 | } else { | |
164 | u8 udma_mode; | |
85cd7251 | 165 | |
669a5db4 | 166 | /* UDMA66 on: UDMA 33 and 66 are switchable via register 0x4A */ |
85cd7251 | 167 | |
669a5db4 | 168 | pci_read_config_byte(dev, 0x4A, &udma_mode); |
85cd7251 | 169 | |
669a5db4 JG |
170 | if (adev->xfer_mode == XFER_UDMA_2) |
171 | udma_mode &= ~ (1 << adev->devno); | |
172 | else /* UDMA 4 */ | |
173 | udma_mode |= (1 << adev->devno); | |
85cd7251 | 174 | |
669a5db4 | 175 | pci_write_config_byte(dev, 0x4A, udma_mode); |
85cd7251 | 176 | |
669a5db4 JG |
177 | udma_enable |= (1 << adev->devno); |
178 | } | |
179 | pci_write_config_word(dev, 0x40, idetm_data); | |
180 | pci_write_config_byte(dev, 0x48, udma_enable); | |
181 | ||
182 | /* Track which port is configured */ | |
183 | ap->private_data = adev; | |
184 | } | |
185 | ||
186 | /** | |
187 | * radisys_qc_issue_prot - command issue | |
188 | * @qc: command pending | |
189 | * | |
190 | * Called when the libata layer is about to issue a command. We wrap | |
191 | * this interface so that we can load the correct ATA timings if | |
192 | * neccessary. Our logic also clears TIME0/TIME1 for the other device so | |
193 | * that, even if we get this wrong, cycles to the other device will | |
194 | * be made PIO0. | |
195 | */ | |
196 | ||
197 | static unsigned int radisys_qc_issue_prot(struct ata_queued_cmd *qc) | |
198 | { | |
199 | struct ata_port *ap = qc->ap; | |
200 | struct ata_device *adev = qc->dev; | |
201 | ||
202 | if (adev != ap->private_data) { | |
203 | /* UDMA timing is not shared */ | |
204 | if (adev->dma_mode < XFER_UDMA_0) { | |
205 | if (adev->dma_mode) | |
206 | radisys_set_dmamode(ap, adev); | |
207 | else if (adev->pio_mode) | |
208 | radisys_set_piomode(ap, adev); | |
209 | } | |
210 | } | |
211 | return ata_qc_issue_prot(qc); | |
212 | } | |
213 | ||
214 | ||
215 | static struct scsi_host_template radisys_sht = { | |
216 | .module = THIS_MODULE, | |
217 | .name = DRV_NAME, | |
218 | .ioctl = ata_scsi_ioctl, | |
219 | .queuecommand = ata_scsi_queuecmd, | |
220 | .can_queue = ATA_DEF_QUEUE, | |
221 | .this_id = ATA_SHT_THIS_ID, | |
222 | .sg_tablesize = LIBATA_MAX_PRD, | |
669a5db4 JG |
223 | .cmd_per_lun = ATA_SHT_CMD_PER_LUN, |
224 | .emulated = ATA_SHT_EMULATED, | |
225 | .use_clustering = ATA_SHT_USE_CLUSTERING, | |
226 | .proc_name = DRV_NAME, | |
227 | .dma_boundary = ATA_DMA_BOUNDARY, | |
228 | .slave_configure = ata_scsi_slave_config, | |
afdfe899 | 229 | .slave_destroy = ata_scsi_slave_destroy, |
669a5db4 | 230 | .bios_param = ata_std_bios_param, |
30ced0f0 A |
231 | .resume = ata_scsi_device_resume, |
232 | .suspend = ata_scsi_device_suspend, | |
669a5db4 JG |
233 | }; |
234 | ||
235 | static const struct ata_port_operations radisys_pata_ops = { | |
236 | .port_disable = ata_port_disable, | |
237 | .set_piomode = radisys_set_piomode, | |
238 | .set_dmamode = radisys_set_dmamode, | |
239 | .mode_filter = ata_pci_default_filter, | |
240 | ||
241 | .tf_load = ata_tf_load, | |
242 | .tf_read = ata_tf_read, | |
243 | .check_status = ata_check_status, | |
244 | .exec_command = ata_exec_command, | |
245 | .dev_select = ata_std_dev_select, | |
246 | ||
247 | .freeze = ata_bmdma_freeze, | |
248 | .thaw = ata_bmdma_thaw, | |
249 | .error_handler = radisys_pata_error_handler, | |
250 | .post_internal_cmd = ata_bmdma_post_internal_cmd, | |
251 | ||
252 | .bmdma_setup = ata_bmdma_setup, | |
253 | .bmdma_start = ata_bmdma_start, | |
254 | .bmdma_stop = ata_bmdma_stop, | |
255 | .bmdma_status = ata_bmdma_status, | |
256 | .qc_prep = ata_qc_prep, | |
257 | .qc_issue = radisys_qc_issue_prot, | |
0d5ff566 | 258 | .data_xfer = ata_data_xfer, |
669a5db4 | 259 | |
669a5db4 JG |
260 | .irq_handler = ata_interrupt, |
261 | .irq_clear = ata_bmdma_irq_clear, | |
246ce3b6 AI |
262 | .irq_on = ata_irq_on, |
263 | .irq_ack = ata_irq_ack, | |
669a5db4 JG |
264 | |
265 | .port_start = ata_port_start, | |
669a5db4 JG |
266 | }; |
267 | ||
268 | ||
269 | /** | |
270 | * radisys_init_one - Register PIIX ATA PCI device with kernel services | |
271 | * @pdev: PCI device to register | |
272 | * @ent: Entry in radisys_pci_tbl matching with @pdev | |
273 | * | |
274 | * Called from kernel PCI layer. We probe for combined mode (sigh), | |
275 | * and then hand over control to libata, for it to do the rest. | |
276 | * | |
277 | * LOCKING: | |
278 | * Inherited from PCI layer (may sleep). | |
279 | * | |
280 | * RETURNS: | |
281 | * Zero on success, or -ERRNO value. | |
282 | */ | |
283 | ||
284 | static int radisys_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) | |
285 | { | |
286 | static int printed_version; | |
287 | static struct ata_port_info info = { | |
288 | .sht = &radisys_sht, | |
289 | .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, | |
290 | .pio_mask = 0x1f, /* pio0-4 */ | |
291 | .mwdma_mask = 0x07, /* mwdma1-2 */ | |
292 | .udma_mask = 0x14, /* UDMA33/66 only */ | |
293 | .port_ops = &radisys_pata_ops, | |
294 | }; | |
295 | static struct ata_port_info *port_info[2] = { &info, &info }; | |
296 | ||
297 | if (!printed_version++) | |
298 | dev_printk(KERN_DEBUG, &pdev->dev, | |
299 | "version " DRV_VERSION "\n"); | |
300 | ||
301 | return ata_pci_init_one(pdev, port_info, 2); | |
302 | } | |
303 | ||
304 | static const struct pci_device_id radisys_pci_tbl[] = { | |
2d2744fc JG |
305 | { PCI_VDEVICE(RADISYS, 0x8201), }, |
306 | ||
669a5db4 JG |
307 | { } /* terminate list */ |
308 | }; | |
309 | ||
310 | static struct pci_driver radisys_pci_driver = { | |
311 | .name = DRV_NAME, | |
312 | .id_table = radisys_pci_tbl, | |
313 | .probe = radisys_init_one, | |
314 | .remove = ata_pci_remove_one, | |
30ced0f0 A |
315 | .suspend = ata_pci_device_suspend, |
316 | .resume = ata_pci_device_resume, | |
669a5db4 JG |
317 | }; |
318 | ||
319 | static int __init radisys_init(void) | |
320 | { | |
321 | return pci_register_driver(&radisys_pci_driver); | |
322 | } | |
323 | ||
324 | static void __exit radisys_exit(void) | |
325 | { | |
326 | pci_unregister_driver(&radisys_pci_driver); | |
327 | } | |
328 | ||
669a5db4 JG |
329 | module_init(radisys_init); |
330 | module_exit(radisys_exit); | |
331 | ||
332 | MODULE_AUTHOR("Alan Cox"); | |
333 | MODULE_DESCRIPTION("SCSI low-level driver for Radisys R82600 controllers"); | |
334 | MODULE_LICENSE("GPL"); | |
335 | MODULE_DEVICE_TABLE(pci, radisys_pci_tbl); | |
336 | MODULE_VERSION(DRV_VERSION); | |
337 |