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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
669a5db4 JG |
2 | /* |
3 | * Promise PATA TX2/TX4/TX2000/133 IDE driver for pdc20268 to pdc20277. | |
4 | * | |
669a5db4 JG |
5 | * Ported to libata by: |
6 | * Albert Lee <albertcc@tw.ibm.com> IBM Corporation | |
7 | * | |
8 | * Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org> | |
9 | * Portions Copyright (C) 1999 Promise Technology, Inc. | |
10 | * | |
11 | * Author: Frank Tiernan (frankt@promise.com) | |
12 | * Released under terms of General Public License | |
13 | * | |
669a5db4 | 14 | * libata documentation is available via 'make {ps|pdf}docs', |
19285f3c | 15 | * as Documentation/driver-api/libata.rst |
669a5db4 JG |
16 | * |
17 | * Hardware information only available under NDA. | |
669a5db4 JG |
18 | */ |
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/pci.h> | |
669a5db4 JG |
22 | #include <linux/blkdev.h> |
23 | #include <linux/delay.h> | |
24 | #include <linux/device.h> | |
cedda4c3 | 25 | #include <linux/ktime.h> |
669a5db4 JG |
26 | #include <scsi/scsi.h> |
27 | #include <scsi/scsi_host.h> | |
28 | #include <scsi/scsi_cmnd.h> | |
29 | #include <linux/libata.h> | |
669a5db4 JG |
30 | |
31 | #define DRV_NAME "pata_pdc2027x" | |
2a3103ce | 32 | #define DRV_VERSION "1.0" |
669a5db4 JG |
33 | |
34 | enum { | |
0d5ff566 TH |
35 | PDC_MMIO_BAR = 5, |
36 | ||
669a5db4 JG |
37 | PDC_UDMA_100 = 0, |
38 | PDC_UDMA_133 = 1, | |
39 | ||
40 | PDC_100_MHZ = 100000000, | |
41 | PDC_133_MHZ = 133333333, | |
42 | ||
43 | PDC_SYS_CTL = 0x1100, | |
44 | PDC_ATA_CTL = 0x1104, | |
45 | PDC_GLOBAL_CTL = 0x1108, | |
46 | PDC_CTCR0 = 0x110C, | |
47 | PDC_CTCR1 = 0x1110, | |
48 | PDC_BYTE_COUNT = 0x1120, | |
49 | PDC_PLL_CTL = 0x1202, | |
50 | }; | |
51 | ||
52 | static int pdc2027x_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); | |
58eb8cd5 | 53 | #ifdef CONFIG_PM_SLEEP |
adacaf14 | 54 | static int pdc2027x_reinit_one(struct pci_dev *pdev); |
59affa50 | 55 | #endif |
a1efdaba | 56 | static int pdc2027x_prereset(struct ata_link *link, unsigned long deadline); |
669a5db4 JG |
57 | static void pdc2027x_set_piomode(struct ata_port *ap, struct ata_device *adev); |
58 | static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev); | |
669a5db4 | 59 | static int pdc2027x_check_atapi_dma(struct ata_queued_cmd *qc); |
f0a6d77b | 60 | static unsigned int pdc2027x_mode_filter(struct ata_device *adev, unsigned int mask); |
9bedb799 | 61 | static int pdc2027x_cable_detect(struct ata_port *ap); |
0260731f | 62 | static int pdc2027x_set_mode(struct ata_link *link, struct ata_device **r_failed); |
669a5db4 JG |
63 | |
64 | /* | |
65 | * ATA Timing Tables based on 133MHz controller clock. | |
66 | * These tables are only used when the controller is in 133MHz clock. | |
67 | * If the controller is in 100MHz clock, the ASIC hardware will | |
68 | * set the timing registers automatically when "set feature" command | |
69 | * is issued to the device. However, if the controller clock is 133MHz, | |
70 | * the following tables must be used. | |
71 | */ | |
20f9ceed | 72 | static const struct pdc2027x_pio_timing { |
669a5db4 | 73 | u8 value0, value1, value2; |
e00b19e2 | 74 | } pdc2027x_pio_timing_tbl[] = { |
669a5db4 JG |
75 | { 0xfb, 0x2b, 0xac }, /* PIO mode 0 */ |
76 | { 0x46, 0x29, 0xa4 }, /* PIO mode 1 */ | |
77 | { 0x23, 0x26, 0x64 }, /* PIO mode 2 */ | |
78 | { 0x27, 0x0d, 0x35 }, /* PIO mode 3, IORDY on, Prefetch off */ | |
79 | { 0x23, 0x09, 0x25 }, /* PIO mode 4, IORDY on, Prefetch off */ | |
80 | }; | |
81 | ||
20f9ceed | 82 | static const struct pdc2027x_mdma_timing { |
669a5db4 | 83 | u8 value0, value1; |
e00b19e2 | 84 | } pdc2027x_mdma_timing_tbl[] = { |
669a5db4 JG |
85 | { 0xdf, 0x5f }, /* MDMA mode 0 */ |
86 | { 0x6b, 0x27 }, /* MDMA mode 1 */ | |
87 | { 0x69, 0x25 }, /* MDMA mode 2 */ | |
88 | }; | |
89 | ||
20f9ceed | 90 | static const struct pdc2027x_udma_timing { |
669a5db4 | 91 | u8 value0, value1, value2; |
e00b19e2 | 92 | } pdc2027x_udma_timing_tbl[] = { |
669a5db4 JG |
93 | { 0x4a, 0x0f, 0xd5 }, /* UDMA mode 0 */ |
94 | { 0x3a, 0x0a, 0xd0 }, /* UDMA mode 1 */ | |
95 | { 0x2a, 0x07, 0xcd }, /* UDMA mode 2 */ | |
96 | { 0x1a, 0x05, 0xcd }, /* UDMA mode 3 */ | |
97 | { 0x1a, 0x03, 0xcd }, /* UDMA mode 4 */ | |
98 | { 0x1a, 0x02, 0xcb }, /* UDMA mode 5 */ | |
99 | { 0x1a, 0x01, 0xcb }, /* UDMA mode 6 */ | |
100 | }; | |
101 | ||
102 | static const struct pci_device_id pdc2027x_pci_tbl[] = { | |
2d2744fc JG |
103 | { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20268), PDC_UDMA_100 }, |
104 | { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20269), PDC_UDMA_133 }, | |
105 | { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20270), PDC_UDMA_100 }, | |
106 | { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20271), PDC_UDMA_133 }, | |
107 | { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20275), PDC_UDMA_133 }, | |
108 | { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20276), PDC_UDMA_133 }, | |
109 | { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20277), PDC_UDMA_133 }, | |
110 | ||
669a5db4 JG |
111 | { } /* terminate list */ |
112 | }; | |
113 | ||
114 | static struct pci_driver pdc2027x_pci_driver = { | |
115 | .name = DRV_NAME, | |
116 | .id_table = pdc2027x_pci_tbl, | |
117 | .probe = pdc2027x_init_one, | |
24dc5f33 | 118 | .remove = ata_pci_remove_one, |
58eb8cd5 | 119 | #ifdef CONFIG_PM_SLEEP |
adacaf14 BZ |
120 | .suspend = ata_pci_device_suspend, |
121 | .resume = pdc2027x_reinit_one, | |
122 | #endif | |
669a5db4 JG |
123 | }; |
124 | ||
25df73d9 | 125 | static const struct scsi_host_template pdc2027x_sht = { |
68d1d07b | 126 | ATA_BMDMA_SHT(DRV_NAME), |
669a5db4 JG |
127 | }; |
128 | ||
129 | static struct ata_port_operations pdc2027x_pata100_ops = { | |
029cfd6b | 130 | .inherits = &ata_bmdma_port_ops, |
669a5db4 | 131 | .check_atapi_dma = pdc2027x_check_atapi_dma, |
9bedb799 | 132 | .cable_detect = pdc2027x_cable_detect, |
a1efdaba | 133 | .prereset = pdc2027x_prereset, |
669a5db4 JG |
134 | }; |
135 | ||
136 | static struct ata_port_operations pdc2027x_pata133_ops = { | |
029cfd6b TH |
137 | .inherits = &pdc2027x_pata100_ops, |
138 | .mode_filter = pdc2027x_mode_filter, | |
669a5db4 JG |
139 | .set_piomode = pdc2027x_set_piomode, |
140 | .set_dmamode = pdc2027x_set_dmamode, | |
9bedb799 | 141 | .set_mode = pdc2027x_set_mode, |
669a5db4 JG |
142 | }; |
143 | ||
144 | static struct ata_port_info pdc2027x_port_info[] = { | |
145 | /* PDC_UDMA_100 */ | |
146 | { | |
9cbe056f | 147 | .flags = ATA_FLAG_SLAVE_POSS, |
14bdef98 EIB |
148 | .pio_mask = ATA_PIO4, |
149 | .mwdma_mask = ATA_MWDMA2, | |
150 | .udma_mask = ATA_UDMA5, | |
669a5db4 JG |
151 | .port_ops = &pdc2027x_pata100_ops, |
152 | }, | |
153 | /* PDC_UDMA_133 */ | |
154 | { | |
9cbe056f | 155 | .flags = ATA_FLAG_SLAVE_POSS, |
14bdef98 EIB |
156 | .pio_mask = ATA_PIO4, |
157 | .mwdma_mask = ATA_MWDMA2, | |
158 | .udma_mask = ATA_UDMA6, | |
669a5db4 JG |
159 | .port_ops = &pdc2027x_pata133_ops, |
160 | }, | |
161 | }; | |
162 | ||
163 | MODULE_AUTHOR("Andre Hedrick, Frank Tiernan, Albert Lee"); | |
164 | MODULE_DESCRIPTION("libata driver module for Promise PDC20268 to PDC20277"); | |
165 | MODULE_LICENSE("GPL"); | |
166 | MODULE_VERSION(DRV_VERSION); | |
167 | MODULE_DEVICE_TABLE(pci, pdc2027x_pci_tbl); | |
168 | ||
169 | /** | |
170 | * port_mmio - Get the MMIO address of PDC2027x extended registers | |
171 | * @ap: Port | |
172 | * @offset: offset from mmio base | |
173 | */ | |
7c250413 | 174 | static inline void __iomem *port_mmio(struct ata_port *ap, unsigned int offset) |
669a5db4 | 175 | { |
0d5ff566 | 176 | return ap->host->iomap[PDC_MMIO_BAR] + ap->port_no * 0x100 + offset; |
669a5db4 JG |
177 | } |
178 | ||
179 | /** | |
180 | * dev_mmio - Get the MMIO address of PDC2027x extended registers | |
181 | * @ap: Port | |
182 | * @adev: device | |
183 | * @offset: offset from mmio base | |
184 | */ | |
7c250413 | 185 | static inline void __iomem *dev_mmio(struct ata_port *ap, struct ata_device *adev, unsigned int offset) |
669a5db4 JG |
186 | { |
187 | u8 adj = (adev->devno) ? 0x08 : 0x00; | |
188 | return port_mmio(ap, offset) + adj; | |
189 | } | |
190 | ||
191 | /** | |
1906cf27 | 192 | * pdc2027x_cable_detect - Probe host controller cable detect info |
669a5db4 JG |
193 | * @ap: Port for which cable detect info is desired |
194 | * | |
195 | * Read 80c cable indicator from Promise extended register. | |
196 | * This register is latched when the system is reset. | |
197 | * | |
198 | * LOCKING: | |
199 | * None (inherited from caller). | |
200 | */ | |
9bedb799 | 201 | static int pdc2027x_cable_detect(struct ata_port *ap) |
669a5db4 JG |
202 | { |
203 | u32 cgcr; | |
204 | ||
205 | /* check cable detect results */ | |
d2a84f47 | 206 | cgcr = ioread32(port_mmio(ap, PDC_GLOBAL_CTL)); |
669a5db4 JG |
207 | if (cgcr & (1 << 26)) |
208 | goto cbl40; | |
209 | ||
b5a5fc8b | 210 | ata_port_dbg(ap, "No cable or 80-conductor cable\n"); |
669a5db4 | 211 | |
9bedb799 | 212 | return ATA_CBL_PATA80; |
669a5db4 | 213 | cbl40: |
b5a5fc8b | 214 | ata_port_info(ap, DRV_NAME ":40-conductor cable detected\n"); |
9bedb799 | 215 | return ATA_CBL_PATA40; |
669a5db4 JG |
216 | } |
217 | ||
218 | /** | |
219 | * pdc2027x_port_enabled - Check PDC ATA control register to see whether the port is enabled. | |
220 | * @ap: Port to check | |
221 | */ | |
222 | static inline int pdc2027x_port_enabled(struct ata_port *ap) | |
223 | { | |
d2a84f47 | 224 | return ioread8(port_mmio(ap, PDC_ATA_CTL)) & 0x02; |
669a5db4 JG |
225 | } |
226 | ||
227 | /** | |
228 | * pdc2027x_prereset - prereset for PATA host controller | |
cc0680a5 | 229 | * @link: Target link |
d4b2bab4 | 230 | * @deadline: deadline jiffies for the operation |
669a5db4 JG |
231 | * |
232 | * Probeinit including cable detection. | |
233 | * | |
234 | * LOCKING: | |
235 | * None (inherited from caller). | |
236 | */ | |
237 | ||
cc0680a5 | 238 | static int pdc2027x_prereset(struct ata_link *link, unsigned long deadline) |
669a5db4 JG |
239 | { |
240 | /* Check whether port enabled */ | |
cc0680a5 | 241 | if (!pdc2027x_port_enabled(link->ap)) |
c961922b | 242 | return -ENOENT; |
9363c382 | 243 | return ata_sff_prereset(link, deadline); |
669a5db4 JG |
244 | } |
245 | ||
9bedb799 | 246 | /** |
1906cf27 | 247 | * pdc2027x_mode_filter - mode selection filter |
9bedb799 AC |
248 | * @adev: ATA device |
249 | * @mask: list of modes proposed | |
250 | * | |
251 | * Block UDMA on devices that cause trouble with this controller. | |
252 | */ | |
253 | ||
f0a6d77b | 254 | static unsigned int pdc2027x_mode_filter(struct ata_device *adev, unsigned int mask) |
9bedb799 AC |
255 | { |
256 | unsigned char model_num[ATA_ID_PROD_LEN + 1]; | |
257 | struct ata_device *pair = ata_dev_pair(adev); | |
258 | ||
259 | if (adev->class != ATA_DEV_ATA || adev->devno == 0 || pair == NULL) | |
c7087652 | 260 | return mask; |
9bedb799 AC |
261 | |
262 | /* Check for slave of a Maxtor at UDMA6 */ | |
263 | ata_id_c_string(pair->id, model_num, ATA_ID_PROD, | |
264 | ATA_ID_PROD_LEN + 1); | |
265 | /* If the master is a maxtor in UDMA6 then the slave should not use UDMA 6 */ | |
4ca4e439 | 266 | if (strstr(model_num, "Maxtor") == NULL && pair->dma_mode == XFER_UDMA_6) |
9bedb799 AC |
267 | mask &= ~ (1 << (6 + ATA_SHIFT_UDMA)); |
268 | ||
c7087652 | 269 | return mask; |
9bedb799 AC |
270 | } |
271 | ||
669a5db4 JG |
272 | /** |
273 | * pdc2027x_set_piomode - Initialize host controller PATA PIO timings | |
274 | * @ap: Port to configure | |
275 | * @adev: um | |
669a5db4 JG |
276 | * |
277 | * Set PIO mode for device. | |
278 | * | |
279 | * LOCKING: | |
280 | * None (inherited from caller). | |
281 | */ | |
282 | ||
283 | static void pdc2027x_set_piomode(struct ata_port *ap, struct ata_device *adev) | |
284 | { | |
285 | unsigned int pio = adev->pio_mode - XFER_PIO_0; | |
286 | u32 ctcr0, ctcr1; | |
287 | ||
b5a5fc8b | 288 | ata_port_dbg(ap, "adev->pio_mode[%X]\n", adev->pio_mode); |
669a5db4 JG |
289 | |
290 | /* Sanity check */ | |
291 | if (pio > 4) { | |
b5a5fc8b | 292 | ata_port_err(ap, "Unknown pio mode [%d] ignored\n", pio); |
669a5db4 JG |
293 | return; |
294 | ||
295 | } | |
296 | ||
297 | /* Set the PIO timing registers using value table for 133MHz */ | |
b5a5fc8b | 298 | ata_port_dbg(ap, "Set pio regs... \n"); |
669a5db4 | 299 | |
d2a84f47 | 300 | ctcr0 = ioread32(dev_mmio(ap, adev, PDC_CTCR0)); |
669a5db4 JG |
301 | ctcr0 &= 0xffff0000; |
302 | ctcr0 |= pdc2027x_pio_timing_tbl[pio].value0 | | |
303 | (pdc2027x_pio_timing_tbl[pio].value1 << 8); | |
d2a84f47 | 304 | iowrite32(ctcr0, dev_mmio(ap, adev, PDC_CTCR0)); |
669a5db4 | 305 | |
d2a84f47 | 306 | ctcr1 = ioread32(dev_mmio(ap, adev, PDC_CTCR1)); |
669a5db4 JG |
307 | ctcr1 &= 0x00ffffff; |
308 | ctcr1 |= (pdc2027x_pio_timing_tbl[pio].value2 << 24); | |
d2a84f47 | 309 | iowrite32(ctcr1, dev_mmio(ap, adev, PDC_CTCR1)); |
669a5db4 | 310 | |
b5a5fc8b | 311 | ata_port_dbg(ap, "Set to pio mode[%u] \n", pio); |
669a5db4 JG |
312 | } |
313 | ||
314 | /** | |
315 | * pdc2027x_set_dmamode - Initialize host controller PATA UDMA timings | |
316 | * @ap: Port to configure | |
317 | * @adev: um | |
669a5db4 JG |
318 | * |
319 | * Set UDMA mode for device. | |
320 | * | |
321 | * LOCKING: | |
322 | * None (inherited from caller). | |
323 | */ | |
324 | static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev) | |
325 | { | |
326 | unsigned int dma_mode = adev->dma_mode; | |
327 | u32 ctcr0, ctcr1; | |
328 | ||
329 | if ((dma_mode >= XFER_UDMA_0) && | |
330 | (dma_mode <= XFER_UDMA_6)) { | |
331 | /* Set the UDMA timing registers with value table for 133MHz */ | |
332 | unsigned int udma_mode = dma_mode & 0x07; | |
333 | ||
334 | if (dma_mode == XFER_UDMA_2) { | |
335 | /* | |
336 | * Turn off tHOLD. | |
337 | * If tHOLD is '1', the hardware will add half clock for data hold time. | |
338 | * This code segment seems to be no effect. tHOLD will be overwritten below. | |
339 | */ | |
d2a84f47 AC |
340 | ctcr1 = ioread32(dev_mmio(ap, adev, PDC_CTCR1)); |
341 | iowrite32(ctcr1 & ~(1 << 7), dev_mmio(ap, adev, PDC_CTCR1)); | |
669a5db4 JG |
342 | } |
343 | ||
b5a5fc8b | 344 | ata_port_dbg(ap, "Set udma regs... \n"); |
669a5db4 | 345 | |
d2a84f47 | 346 | ctcr1 = ioread32(dev_mmio(ap, adev, PDC_CTCR1)); |
669a5db4 JG |
347 | ctcr1 &= 0xff000000; |
348 | ctcr1 |= pdc2027x_udma_timing_tbl[udma_mode].value0 | | |
349 | (pdc2027x_udma_timing_tbl[udma_mode].value1 << 8) | | |
350 | (pdc2027x_udma_timing_tbl[udma_mode].value2 << 16); | |
d2a84f47 | 351 | iowrite32(ctcr1, dev_mmio(ap, adev, PDC_CTCR1)); |
669a5db4 | 352 | |
b5a5fc8b | 353 | ata_port_dbg(ap, "Set to udma mode[%u] \n", udma_mode); |
669a5db4 JG |
354 | |
355 | } else if ((dma_mode >= XFER_MW_DMA_0) && | |
356 | (dma_mode <= XFER_MW_DMA_2)) { | |
357 | /* Set the MDMA timing registers with value table for 133MHz */ | |
358 | unsigned int mdma_mode = dma_mode & 0x07; | |
359 | ||
b5a5fc8b | 360 | ata_port_dbg(ap, "Set mdma regs... \n"); |
d2a84f47 | 361 | ctcr0 = ioread32(dev_mmio(ap, adev, PDC_CTCR0)); |
669a5db4 JG |
362 | |
363 | ctcr0 &= 0x0000ffff; | |
364 | ctcr0 |= (pdc2027x_mdma_timing_tbl[mdma_mode].value0 << 16) | | |
365 | (pdc2027x_mdma_timing_tbl[mdma_mode].value1 << 24); | |
366 | ||
d2a84f47 | 367 | iowrite32(ctcr0, dev_mmio(ap, adev, PDC_CTCR0)); |
669a5db4 | 368 | |
b5a5fc8b | 369 | ata_port_dbg(ap, "Set to mdma mode[%u] \n", mdma_mode); |
669a5db4 | 370 | } else { |
b5a5fc8b | 371 | ata_port_err(ap, "Unknown dma mode [%u] ignored\n", dma_mode); |
669a5db4 JG |
372 | } |
373 | } | |
374 | ||
375 | /** | |
9bedb799 | 376 | * pdc2027x_set_mode - Set the timing registers back to correct values. |
0260731f | 377 | * @link: link to configure |
9bedb799 | 378 | * @r_failed: Returned device for failure |
669a5db4 JG |
379 | * |
380 | * The pdc2027x hardware will look at "SET FEATURES" and change the timing registers | |
381 | * automatically. The values set by the hardware might be incorrect, under 133Mhz PLL. | |
382 | * This function overwrites the possibly incorrect values set by the hardware to be correct. | |
383 | */ | |
0260731f | 384 | static int pdc2027x_set_mode(struct ata_link *link, struct ata_device **r_failed) |
669a5db4 | 385 | { |
0260731f | 386 | struct ata_port *ap = link->ap; |
f58229f8 TH |
387 | struct ata_device *dev; |
388 | int rc; | |
669a5db4 | 389 | |
0260731f | 390 | rc = ata_do_set_mode(link, r_failed); |
f58229f8 TH |
391 | if (rc < 0) |
392 | return rc; | |
669a5db4 | 393 | |
1eca4365 TH |
394 | ata_for_each_dev(dev, link, ENABLED) { |
395 | pdc2027x_set_piomode(ap, dev); | |
396 | ||
397 | /* | |
398 | * Enable prefetch if the device support PIO only. | |
399 | */ | |
400 | if (dev->xfer_shift == ATA_SHIFT_PIO) { | |
401 | u32 ctcr1 = ioread32(dev_mmio(ap, dev, PDC_CTCR1)); | |
402 | ctcr1 |= (1 << 25); | |
403 | iowrite32(ctcr1, dev_mmio(ap, dev, PDC_CTCR1)); | |
404 | ||
b5a5fc8b | 405 | ata_dev_dbg(dev, "Turn on prefetch\n"); |
1eca4365 TH |
406 | } else { |
407 | pdc2027x_set_dmamode(ap, dev); | |
669a5db4 JG |
408 | } |
409 | } | |
9bedb799 | 410 | return 0; |
669a5db4 JG |
411 | } |
412 | ||
413 | /** | |
414 | * pdc2027x_check_atapi_dma - Check whether ATAPI DMA can be supported for this command | |
415 | * @qc: Metadata associated with taskfile to check | |
416 | * | |
417 | * LOCKING: | |
418 | * None (inherited from caller). | |
419 | * | |
420 | * RETURNS: 0 when ATAPI DMA can be used | |
421 | * 1 otherwise | |
422 | */ | |
423 | static int pdc2027x_check_atapi_dma(struct ata_queued_cmd *qc) | |
424 | { | |
425 | struct scsi_cmnd *cmd = qc->scsicmd; | |
426 | u8 *scsicmd = cmd->cmnd; | |
427 | int rc = 1; /* atapi dma off by default */ | |
428 | ||
429 | /* | |
430 | * This workaround is from Promise's GPL driver. | |
431 | * If ATAPI DMA is used for commands not in the | |
432 | * following white list, say MODE_SENSE and REQUEST_SENSE, | |
433 | * pdc2027x might hit the irq lost problem. | |
434 | */ | |
435 | switch (scsicmd[0]) { | |
436 | case READ_10: | |
437 | case WRITE_10: | |
438 | case READ_12: | |
439 | case WRITE_12: | |
440 | case READ_6: | |
441 | case WRITE_6: | |
442 | case 0xad: /* READ_DVD_STRUCTURE */ | |
443 | case 0xbe: /* READ_CD */ | |
444 | /* ATAPI DMA is ok */ | |
445 | rc = 0; | |
446 | break; | |
447 | default: | |
448 | ; | |
449 | } | |
450 | ||
451 | return rc; | |
452 | } | |
453 | ||
454 | /** | |
455 | * pdc_read_counter - Read the ctr counter | |
5d728824 | 456 | * @host: target ATA host |
669a5db4 JG |
457 | */ |
458 | ||
5d728824 | 459 | static long pdc_read_counter(struct ata_host *host) |
669a5db4 | 460 | { |
5d728824 | 461 | void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR]; |
669a5db4 JG |
462 | long counter; |
463 | int retry = 1; | |
464 | u32 bccrl, bccrh, bccrlv, bccrhv; | |
465 | ||
466 | retry: | |
d2a84f47 AC |
467 | bccrl = ioread32(mmio_base + PDC_BYTE_COUNT) & 0x7fff; |
468 | bccrh = ioread32(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff; | |
669a5db4 JG |
469 | |
470 | /* Read the counter values again for verification */ | |
d2a84f47 AC |
471 | bccrlv = ioread32(mmio_base + PDC_BYTE_COUNT) & 0x7fff; |
472 | bccrhv = ioread32(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff; | |
669a5db4 JG |
473 | |
474 | counter = (bccrh << 15) | bccrl; | |
475 | ||
b5a5fc8b HR |
476 | dev_dbg(host->dev, "bccrh [%X] bccrl [%X]\n", bccrh, bccrl); |
477 | dev_dbg(host->dev, "bccrhv[%X] bccrlv[%X]\n", bccrhv, bccrlv); | |
669a5db4 JG |
478 | |
479 | /* | |
480 | * The 30-bit decreasing counter are read by 2 pieces. | |
481 | * Incorrect value may be read when both bccrh and bccrl are changing. | |
482 | * Ex. When 7900 decrease to 78FF, wrong value 7800 might be read. | |
483 | */ | |
484 | if (retry && !(bccrh == bccrhv && bccrl >= bccrlv)) { | |
485 | retry--; | |
b5a5fc8b | 486 | dev_dbg(host->dev, "rereading counter\n"); |
669a5db4 JG |
487 | goto retry; |
488 | } | |
489 | ||
490 | return counter; | |
491 | } | |
492 | ||
493 | /** | |
1906cf27 | 494 | * pdc_adjust_pll - Adjust the PLL input clock in Hz. |
669a5db4 | 495 | * |
5d728824 | 496 | * @host: target ATA host |
669a5db4 | 497 | * @pll_clock: The input of PLL in HZ |
1906cf27 | 498 | * @board_idx: board identifier |
669a5db4 | 499 | */ |
5d728824 | 500 | static void pdc_adjust_pll(struct ata_host *host, long pll_clock, unsigned int board_idx) |
669a5db4 | 501 | { |
5d728824 | 502 | void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR]; |
669a5db4 JG |
503 | u16 pll_ctl; |
504 | long pll_clock_khz = pll_clock / 1000; | |
505 | long pout_required = board_idx? PDC_133_MHZ:PDC_100_MHZ; | |
506 | long ratio = pout_required / pll_clock_khz; | |
507 | int F, R; | |
508 | ||
509 | /* Sanity check */ | |
510 | if (unlikely(pll_clock_khz < 5000L || pll_clock_khz > 70000L)) { | |
b5a5fc8b HR |
511 | dev_err(host->dev, "Invalid PLL input clock %ldkHz, give up!\n", |
512 | pll_clock_khz); | |
669a5db4 JG |
513 | return; |
514 | } | |
515 | ||
b5a5fc8b | 516 | dev_dbg(host->dev, "pout_required is %ld\n", pout_required); |
669a5db4 JG |
517 | |
518 | /* Show the current clock value of PLL control register | |
519 | * (maybe already configured by the firmware) | |
520 | */ | |
d2a84f47 | 521 | pll_ctl = ioread16(mmio_base + PDC_PLL_CTL); |
669a5db4 | 522 | |
b5a5fc8b | 523 | dev_dbg(host->dev, "pll_ctl[%X]\n", pll_ctl); |
669a5db4 JG |
524 | |
525 | /* | |
526 | * Calculate the ratio of F, R and OD | |
527 | * POUT = (F + 2) / (( R + 2) * NO) | |
528 | */ | |
529 | if (ratio < 8600L) { /* 8.6x */ | |
530 | /* Using NO = 0x01, R = 0x0D */ | |
531 | R = 0x0d; | |
532 | } else if (ratio < 12900L) { /* 12.9x */ | |
533 | /* Using NO = 0x01, R = 0x08 */ | |
534 | R = 0x08; | |
535 | } else if (ratio < 16100L) { /* 16.1x */ | |
536 | /* Using NO = 0x01, R = 0x06 */ | |
537 | R = 0x06; | |
538 | } else if (ratio < 64000L) { /* 64x */ | |
539 | R = 0x00; | |
540 | } else { | |
541 | /* Invalid ratio */ | |
b5a5fc8b | 542 | dev_err(host->dev, "Invalid ratio %ld, give up!\n", ratio); |
669a5db4 JG |
543 | return; |
544 | } | |
545 | ||
546 | F = (ratio * (R+2)) / 1000 - 2; | |
547 | ||
548 | if (unlikely(F < 0 || F > 127)) { | |
549 | /* Invalid F */ | |
b5a5fc8b | 550 | dev_err(host->dev, "F[%d] invalid!\n", F); |
669a5db4 JG |
551 | return; |
552 | } | |
553 | ||
b5a5fc8b | 554 | dev_dbg(host->dev, "F[%d] R[%d] ratio*1000[%ld]\n", F, R, ratio); |
669a5db4 JG |
555 | |
556 | pll_ctl = (R << 8) | F; | |
557 | ||
b5a5fc8b | 558 | dev_dbg(host->dev, "Writing pll_ctl[%X]\n", pll_ctl); |
669a5db4 | 559 | |
d2a84f47 AC |
560 | iowrite16(pll_ctl, mmio_base + PDC_PLL_CTL); |
561 | ioread16(mmio_base + PDC_PLL_CTL); /* flush */ | |
669a5db4 JG |
562 | |
563 | /* Wait the PLL circuit to be stable */ | |
b3506c7e | 564 | msleep(30); |
669a5db4 | 565 | |
669a5db4 JG |
566 | /* |
567 | * Show the current clock value of PLL control register | |
568 | * (maybe configured by the firmware) | |
569 | */ | |
d2a84f47 | 570 | pll_ctl = ioread16(mmio_base + PDC_PLL_CTL); |
669a5db4 | 571 | |
b5a5fc8b | 572 | dev_dbg(host->dev, "pll_ctl[%X]\n", pll_ctl); |
669a5db4 JG |
573 | |
574 | return; | |
575 | } | |
576 | ||
577 | /** | |
1906cf27 | 578 | * pdc_detect_pll_input_clock - Detect the PLL input clock in Hz. |
5d728824 | 579 | * @host: target ATA host |
669a5db4 JG |
580 | * Ex. 16949000 on 33MHz PCI bus for pdc20275. |
581 | * Half of the PCI clock. | |
582 | */ | |
5d728824 | 583 | static long pdc_detect_pll_input_clock(struct ata_host *host) |
669a5db4 | 584 | { |
5d728824 | 585 | void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR]; |
669a5db4 JG |
586 | u32 scr; |
587 | long start_count, end_count; | |
cedda4c3 | 588 | ktime_t start_time, end_time; |
8c781bf7 | 589 | long pll_clock, usec_elapsed; |
669a5db4 | 590 | |
669a5db4 | 591 | /* Start the test mode */ |
d2a84f47 | 592 | scr = ioread32(mmio_base + PDC_SYS_CTL); |
b5a5fc8b | 593 | dev_dbg(host->dev, "scr[%X]\n", scr); |
d2a84f47 AC |
594 | iowrite32(scr | (0x01 << 14), mmio_base + PDC_SYS_CTL); |
595 | ioread32(mmio_base + PDC_SYS_CTL); /* flush */ | |
669a5db4 | 596 | |
78c4af0b MP |
597 | /* Read current counter value */ |
598 | start_count = pdc_read_counter(host); | |
cedda4c3 | 599 | start_time = ktime_get(); |
78c4af0b | 600 | |
669a5db4 | 601 | /* Let the counter run for 100 ms. */ |
b3506c7e | 602 | msleep(100); |
669a5db4 JG |
603 | |
604 | /* Read the counter values again */ | |
5d728824 | 605 | end_count = pdc_read_counter(host); |
cedda4c3 | 606 | end_time = ktime_get(); |
669a5db4 JG |
607 | |
608 | /* Stop the test mode */ | |
d2a84f47 | 609 | scr = ioread32(mmio_base + PDC_SYS_CTL); |
b5a5fc8b | 610 | dev_dbg(host->dev, "scr[%X]\n", scr); |
d2a84f47 AC |
611 | iowrite32(scr & ~(0x01 << 14), mmio_base + PDC_SYS_CTL); |
612 | ioread32(mmio_base + PDC_SYS_CTL); /* flush */ | |
669a5db4 JG |
613 | |
614 | /* calculate the input clock in Hz */ | |
cedda4c3 | 615 | usec_elapsed = (long) ktime_us_delta(end_time, start_time); |
8c781bf7 | 616 | |
78c4af0b | 617 | pll_clock = ((start_count - end_count) & 0x3fffffff) / 100 * |
8c781bf7 | 618 | (100000000 / usec_elapsed); |
669a5db4 | 619 | |
b5a5fc8b HR |
620 | dev_dbg(host->dev, "start[%ld] end[%ld] PLL input clock[%ld]HZ\n", |
621 | start_count, end_count, pll_clock); | |
669a5db4 JG |
622 | |
623 | return pll_clock; | |
624 | } | |
625 | ||
626 | /** | |
627 | * pdc_hardware_init - Initialize the hardware. | |
5d728824 TH |
628 | * @host: target ATA host |
629 | * @board_idx: board identifier | |
669a5db4 | 630 | */ |
c1da86c1 | 631 | static void pdc_hardware_init(struct ata_host *host, unsigned int board_idx) |
669a5db4 JG |
632 | { |
633 | long pll_clock; | |
634 | ||
635 | /* | |
636 | * Detect PLL input clock rate. | |
637 | * On some system, where PCI bus is running at non-standard clock rate. | |
638 | * Ex. 25MHz or 40MHz, we have to adjust the cycle_time. | |
639 | * The pdc20275 controller employs PLL circuit to help correct timing registers setting. | |
640 | */ | |
5d728824 | 641 | pll_clock = pdc_detect_pll_input_clock(host); |
669a5db4 | 642 | |
a44fec1f | 643 | dev_info(host->dev, "PLL input clock %ld kHz\n", pll_clock/1000); |
669a5db4 JG |
644 | |
645 | /* Adjust PLL control register */ | |
5d728824 | 646 | pdc_adjust_pll(host, pll_clock, board_idx); |
669a5db4 JG |
647 | } |
648 | ||
649 | /** | |
650 | * pdc_ata_setup_port - setup the mmio address | |
651 | * @port: ata ioports to setup | |
652 | * @base: base address | |
653 | */ | |
0d5ff566 | 654 | static void pdc_ata_setup_port(struct ata_ioports *port, void __iomem *base) |
669a5db4 JG |
655 | { |
656 | port->cmd_addr = | |
657 | port->data_addr = base; | |
658 | port->feature_addr = | |
659 | port->error_addr = base + 0x05; | |
660 | port->nsect_addr = base + 0x0a; | |
661 | port->lbal_addr = base + 0x0f; | |
662 | port->lbam_addr = base + 0x10; | |
663 | port->lbah_addr = base + 0x15; | |
664 | port->device_addr = base + 0x1a; | |
665 | port->command_addr = | |
666 | port->status_addr = base + 0x1f; | |
667 | port->altstatus_addr = | |
668 | port->ctl_addr = base + 0x81a; | |
669 | } | |
670 | ||
671 | /** | |
672 | * pdc2027x_init_one - PCI probe function | |
673 | * Called when an instance of PCI adapter is inserted. | |
674 | * This function checks whether the hardware is supported, | |
675 | * initialize hardware and register an instance of ata_host to | |
5d728824 | 676 | * libata. (implements struct pci_driver.probe() ) |
669a5db4 JG |
677 | * |
678 | * @pdev: instance of pci_dev found | |
679 | * @ent: matching entry in the id_tbl[] | |
680 | */ | |
0ec24914 GKH |
681 | static int pdc2027x_init_one(struct pci_dev *pdev, |
682 | const struct pci_device_id *ent) | |
669a5db4 | 683 | { |
cbcdd875 TH |
684 | static const unsigned long cmd_offset[] = { 0x17c0, 0x15c0 }; |
685 | static const unsigned long bmdma_offset[] = { 0x1000, 0x1008 }; | |
669a5db4 | 686 | unsigned int board_idx = (unsigned int) ent->driver_data; |
5d728824 TH |
687 | const struct ata_port_info *ppi[] = |
688 | { &pdc2027x_port_info[board_idx], NULL }; | |
689 | struct ata_host *host; | |
7c250413 | 690 | void __iomem *mmio_base; |
cbcdd875 | 691 | int i, rc; |
669a5db4 | 692 | |
06296a1e | 693 | ata_print_version_once(&pdev->dev, DRV_VERSION); |
669a5db4 | 694 | |
5d728824 TH |
695 | /* alloc host */ |
696 | host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2); | |
697 | if (!host) | |
698 | return -ENOMEM; | |
699 | ||
700 | /* acquire resources and fill host */ | |
24dc5f33 | 701 | rc = pcim_enable_device(pdev); |
669a5db4 JG |
702 | if (rc) |
703 | return rc; | |
704 | ||
0d5ff566 | 705 | rc = pcim_iomap_regions(pdev, 1 << PDC_MMIO_BAR, DRV_NAME); |
669a5db4 | 706 | if (rc) |
24dc5f33 | 707 | return rc; |
5d728824 | 708 | host->iomap = pcim_iomap_table(pdev); |
669a5db4 | 709 | |
b5e55556 | 710 | rc = dma_set_mask_and_coherent(&pdev->dev, ATA_DMA_MASK); |
669a5db4 | 711 | if (rc) |
24dc5f33 | 712 | return rc; |
669a5db4 | 713 | |
5d728824 | 714 | mmio_base = host->iomap[PDC_MMIO_BAR]; |
669a5db4 | 715 | |
cbcdd875 TH |
716 | for (i = 0; i < 2; i++) { |
717 | struct ata_port *ap = host->ports[i]; | |
718 | ||
719 | pdc_ata_setup_port(&ap->ioaddr, mmio_base + cmd_offset[i]); | |
720 | ap->ioaddr.bmdma_addr = mmio_base + bmdma_offset[i]; | |
721 | ||
722 | ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio"); | |
723 | ata_port_pbar_desc(ap, PDC_MMIO_BAR, cmd_offset[i], "cmd"); | |
724 | } | |
0d5ff566 | 725 | |
669a5db4 JG |
726 | //pci_enable_intx(pdev); |
727 | ||
728 | /* initialize adapter */ | |
c1da86c1 | 729 | pdc_hardware_init(host, board_idx); |
669a5db4 | 730 | |
5d728824 | 731 | pci_set_master(pdev); |
c3b28894 | 732 | return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt, |
9363c382 | 733 | IRQF_SHARED, &pdc2027x_sht); |
669a5db4 JG |
734 | } |
735 | ||
58eb8cd5 | 736 | #ifdef CONFIG_PM_SLEEP |
adacaf14 BZ |
737 | static int pdc2027x_reinit_one(struct pci_dev *pdev) |
738 | { | |
0a86e1c8 | 739 | struct ata_host *host = pci_get_drvdata(pdev); |
adacaf14 BZ |
740 | unsigned int board_idx; |
741 | int rc; | |
742 | ||
743 | rc = ata_pci_device_do_resume(pdev); | |
744 | if (rc) | |
745 | return rc; | |
746 | ||
747 | if (pdev->device == PCI_DEVICE_ID_PROMISE_20268 || | |
748 | pdev->device == PCI_DEVICE_ID_PROMISE_20270) | |
749 | board_idx = PDC_UDMA_100; | |
750 | else | |
751 | board_idx = PDC_UDMA_133; | |
752 | ||
c1da86c1 | 753 | pdc_hardware_init(host, board_idx); |
adacaf14 BZ |
754 | |
755 | ata_host_resume(host); | |
756 | return 0; | |
757 | } | |
758 | #endif | |
759 | ||
2fc75da0 | 760 | module_pci_driver(pdc2027x_pci_driver); |