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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * AMD 755/756/766/8111 and nVidia nForce/2/2s/3/3s/CK804/MCP04
4 * IDE driver for Linux.
5 *
6 * Copyright (c) 2000-2002 Vojtech Pavlik
7 * Copyright (c) 2007-2010 Bartlomiej Zolnierkiewicz
8 *
9 * Based on the work of:
10 * Andre Hedrick
11 */
12
13
14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/pci.h>
17#include <linux/init.h>
18#include <linux/ide.h>
19
20#define DRV_NAME "amd74xx"
21
22enum {
23 AMD_IDE_CONFIG = 0x41,
24 AMD_CABLE_DETECT = 0x42,
25 AMD_DRIVE_TIMING = 0x48,
26 AMD_8BIT_TIMING = 0x4e,
27 AMD_ADDRESS_SETUP = 0x4c,
28 AMD_UDMA_TIMING = 0x50,
29};
30
31static unsigned int amd_80w;
32static unsigned int amd_clock;
33
34static char *amd_dma[] = { "16", "25", "33", "44", "66", "100", "133" };
35static unsigned char amd_cyc2udma[] = { 6, 6, 5, 4, 0, 1, 1, 2, 2, 3, 3, 3, 3, 3, 3, 7 };
36
37static inline u8 amd_offset(struct pci_dev *dev)
38{
39 return (dev->vendor == PCI_VENDOR_ID_NVIDIA) ? 0x10 : 0;
40}
41
42/*
43 * amd_set_speed() writes timing values to the chipset registers
44 */
45
46static void amd_set_speed(struct pci_dev *dev, u8 dn, u8 udma_mask,
47 struct ide_timing *timing)
48{
49 u8 t = 0, offset = amd_offset(dev);
50
51 pci_read_config_byte(dev, AMD_ADDRESS_SETUP + offset, &t);
52 t = (t & ~(3 << ((3 - dn) << 1))) | ((clamp_val(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
53 pci_write_config_byte(dev, AMD_ADDRESS_SETUP + offset, t);
54
55 pci_write_config_byte(dev, AMD_8BIT_TIMING + offset + (1 - (dn >> 1)),
56 ((clamp_val(timing->act8b, 1, 16) - 1) << 4) | (clamp_val(timing->rec8b, 1, 16) - 1));
57
58 pci_write_config_byte(dev, AMD_DRIVE_TIMING + offset + (3 - dn),
59 ((clamp_val(timing->active, 1, 16) - 1) << 4) | (clamp_val(timing->recover, 1, 16) - 1));
60
61 switch (udma_mask) {
62 case ATA_UDMA2: t = timing->udma ? (0xc0 | (clamp_val(timing->udma, 2, 5) - 2)) : 0x03; break;
63 case ATA_UDMA4: t = timing->udma ? (0xc0 | amd_cyc2udma[clamp_val(timing->udma, 2, 10)]) : 0x03; break;
64 case ATA_UDMA5: t = timing->udma ? (0xc0 | amd_cyc2udma[clamp_val(timing->udma, 1, 10)]) : 0x03; break;
65 case ATA_UDMA6: t = timing->udma ? (0xc0 | amd_cyc2udma[clamp_val(timing->udma, 1, 15)]) : 0x03; break;
66 default: return;
67 }
68
69 if (timing->udma)
70 pci_write_config_byte(dev, AMD_UDMA_TIMING + offset + 3 - dn, t);
71}
72
73/*
74 * amd_set_drive() computes timing values and configures the chipset
75 * to a desired transfer mode. It also can be called by upper layers.
76 */
77
78static void amd_set_drive(ide_hwif_t *hwif, ide_drive_t *drive)
79{
80 struct pci_dev *dev = to_pci_dev(hwif->dev);
81 ide_drive_t *peer = ide_get_pair_dev(drive);
82 struct ide_timing t, p;
83 int T, UT;
84 u8 udma_mask = hwif->ultra_mask;
85 const u8 speed = drive->dma_mode;
86
87 T = 1000000000 / amd_clock;
88 UT = (udma_mask == ATA_UDMA2) ? T : (T / 2);
89
90 ide_timing_compute(drive, speed, &t, T, UT);
91
92 if (peer) {
93 ide_timing_compute(peer, peer->pio_mode, &p, T, UT);
94 ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
95 }
96
97 if (speed == XFER_UDMA_5 && amd_clock <= 33333) t.udma = 1;
98 if (speed == XFER_UDMA_6 && amd_clock <= 33333) t.udma = 15;
99
100 amd_set_speed(dev, drive->dn, udma_mask, &t);
101}
102
103/*
104 * amd_set_pio_mode() is a callback from upper layers for PIO-only tuning.
105 */
106
107static void amd_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
108{
109 drive->dma_mode = drive->pio_mode;
110 amd_set_drive(hwif, drive);
111}
112
113static void amd7409_cable_detect(struct pci_dev *dev)
114{
115 /* no host side cable detection */
116 amd_80w = 0x03;
117}
118
119static void amd7411_cable_detect(struct pci_dev *dev)
120{
121 int i;
122 u32 u = 0;
123 u8 t = 0, offset = amd_offset(dev);
124
125 pci_read_config_byte(dev, AMD_CABLE_DETECT + offset, &t);
126 pci_read_config_dword(dev, AMD_UDMA_TIMING + offset, &u);
127 amd_80w = ((t & 0x3) ? 1 : 0) | ((t & 0xc) ? 2 : 0);
128 for (i = 24; i >= 0; i -= 8)
129 if (((u >> i) & 4) && !(amd_80w & (1 << (1 - (i >> 4))))) {
130 printk(KERN_WARNING DRV_NAME " %s: BIOS didn't set "
131 "cable bits correctly. Enabling workaround.\n",
132 pci_name(dev));
133 amd_80w |= (1 << (1 - (i >> 4)));
134 }
135}
136
137/*
138 * The initialization callback. Initialize drive independent registers.
139 */
140
141static int init_chipset_amd74xx(struct pci_dev *dev)
142{
143 u8 t = 0, offset = amd_offset(dev);
144
145/*
146 * Check 80-wire cable presence.
147 */
148
149 if (dev->vendor == PCI_VENDOR_ID_AMD &&
150 dev->device == PCI_DEVICE_ID_AMD_COBRA_7401)
151 ; /* no UDMA > 2 */
152 else if (dev->vendor == PCI_VENDOR_ID_AMD &&
153 dev->device == PCI_DEVICE_ID_AMD_VIPER_7409)
154 amd7409_cable_detect(dev);
155 else
156 amd7411_cable_detect(dev);
157
158/*
159 * Take care of prefetch & postwrite.
160 */
161
162 pci_read_config_byte(dev, AMD_IDE_CONFIG + offset, &t);
163 /*
164 * Check for broken FIFO support.
165 */
166 if (dev->vendor == PCI_VENDOR_ID_AMD &&
167 dev->device == PCI_DEVICE_ID_AMD_VIPER_7411)
168 t &= 0x0f;
169 else
170 t |= 0xf0;
171 pci_write_config_byte(dev, AMD_IDE_CONFIG + offset, t);
172
173 return 0;
174}
175
176static u8 amd_cable_detect(ide_hwif_t *hwif)
177{
178 if ((amd_80w >> hwif->channel) & 1)
179 return ATA_CBL_PATA80;
180 else
181 return ATA_CBL_PATA40;
182}
183
184static const struct ide_port_ops amd_port_ops = {
185 .set_pio_mode = amd_set_pio_mode,
186 .set_dma_mode = amd_set_drive,
187 .cable_detect = amd_cable_detect,
188};
189
190#define IDE_HFLAGS_AMD \
191 (IDE_HFLAG_PIO_NO_BLACKLIST | \
192 IDE_HFLAG_POST_SET_MODE | \
193 IDE_HFLAG_IO_32BIT | \
194 IDE_HFLAG_UNMASK_IRQS)
195
196#define DECLARE_AMD_DEV(swdma, udma) \
197 { \
198 .name = DRV_NAME, \
199 .init_chipset = init_chipset_amd74xx, \
200 .enablebits = {{0x40,0x02,0x02}, {0x40,0x01,0x01}}, \
201 .port_ops = &amd_port_ops, \
202 .host_flags = IDE_HFLAGS_AMD, \
203 .pio_mask = ATA_PIO5, \
204 .swdma_mask = swdma, \
205 .mwdma_mask = ATA_MWDMA2, \
206 .udma_mask = udma, \
207 }
208
209#define DECLARE_NV_DEV(udma) \
210 { \
211 .name = DRV_NAME, \
212 .init_chipset = init_chipset_amd74xx, \
213 .enablebits = {{0x50,0x02,0x02}, {0x50,0x01,0x01}}, \
214 .port_ops = &amd_port_ops, \
215 .host_flags = IDE_HFLAGS_AMD, \
216 .pio_mask = ATA_PIO5, \
217 .swdma_mask = ATA_SWDMA2, \
218 .mwdma_mask = ATA_MWDMA2, \
219 .udma_mask = udma, \
220 }
221
222static const struct ide_port_info amd74xx_chipsets[] = {
223 /* 0: AMD7401 */ DECLARE_AMD_DEV(0x00, ATA_UDMA2),
224 /* 1: AMD7409 */ DECLARE_AMD_DEV(ATA_SWDMA2, ATA_UDMA4),
225 /* 2: AMD7411/7441 */ DECLARE_AMD_DEV(ATA_SWDMA2, ATA_UDMA5),
226 /* 3: AMD8111 */ DECLARE_AMD_DEV(ATA_SWDMA2, ATA_UDMA6),
227
228 /* 4: NFORCE */ DECLARE_NV_DEV(ATA_UDMA5),
229 /* 5: >= NFORCE2 */ DECLARE_NV_DEV(ATA_UDMA6),
230
231 /* 6: AMD5536 */ DECLARE_AMD_DEV(ATA_SWDMA2, ATA_UDMA5),
232};
233
234static int amd74xx_probe(struct pci_dev *dev, const struct pci_device_id *id)
235{
236 struct ide_port_info d;
237 u8 idx = id->driver_data;
238
239 d = amd74xx_chipsets[idx];
240
241 /*
242 * Check for bad SWDMA and incorrectly wired Serenade mainboards.
243 */
244 if (idx == 1) {
245 if (dev->revision <= 7)
246 d.swdma_mask = 0;
247 d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX;
248 } else if (idx == 3) {
249 if (dev->subsystem_vendor == PCI_VENDOR_ID_AMD &&
250 dev->subsystem_device == PCI_DEVICE_ID_AMD_SERENADE)
251 d.udma_mask = ATA_UDMA5;
252 }
253
254 /*
255 * It seems that on some nVidia controllers using AltStatus
256 * register can be unreliable so default to Status register
257 * if the device is in Compatibility Mode.
258 */
259 if (dev->vendor == PCI_VENDOR_ID_NVIDIA &&
260 ide_pci_is_in_compatibility_mode(dev))
261 d.host_flags |= IDE_HFLAG_BROKEN_ALTSTATUS;
262
263 printk(KERN_INFO "%s %s: UDMA%s controller\n",
264 d.name, pci_name(dev), amd_dma[fls(d.udma_mask) - 1]);
265
266 /*
267 * Determine the system bus clock.
268 */
269 amd_clock = (ide_pci_clk ? ide_pci_clk : 33) * 1000;
270
271 switch (amd_clock) {
272 case 33000: amd_clock = 33333; break;
273 case 37000: amd_clock = 37500; break;
274 case 41000: amd_clock = 41666; break;
275 }
276
277 if (amd_clock < 20000 || amd_clock > 50000) {
278 printk(KERN_WARNING "%s: User given PCI clock speed impossible"
279 " (%d), using 33 MHz instead.\n",
280 d.name, amd_clock);
281 amd_clock = 33333;
282 }
283
284 return ide_pci_init_one(dev, &d, NULL);
285}
286
287static const struct pci_device_id amd74xx_pci_tbl[] = {
288 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_COBRA_7401), 0 },
289 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_VIPER_7409), 1 },
290 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_VIPER_7411), 2 },
291 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_OPUS_7441), 2 },
292 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_8111_IDE), 3 },
293 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_IDE), 4 },
294 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2_IDE), 5 },
295 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2S_IDE), 5 },
296#ifdef CONFIG_BLK_DEV_IDE_SATA
297 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2S_SATA), 5 },
298#endif
299 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3_IDE), 5 },
300 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_IDE), 5 },
301#ifdef CONFIG_BLK_DEV_IDE_SATA
302 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA), 5 },
303 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA2), 5 },
304#endif
305 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_IDE), 5 },
306 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_IDE), 5 },
307 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_IDE), 5 },
308 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_IDE), 5 },
309 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_IDE), 5 },
310 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP65_IDE), 5 },
311 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP67_IDE), 5 },
312 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP73_IDE), 5 },
313 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP77_IDE), 5 },
314 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_CS5536_IDE), 6 },
315 { 0, },
316};
317MODULE_DEVICE_TABLE(pci, amd74xx_pci_tbl);
318
319static struct pci_driver amd74xx_pci_driver = {
320 .name = "AMD_IDE",
321 .id_table = amd74xx_pci_tbl,
322 .probe = amd74xx_probe,
323 .remove = ide_pci_remove,
324 .suspend = ide_pci_suspend,
325 .resume = ide_pci_resume,
326};
327
328static int __init amd74xx_ide_init(void)
329{
330 return ide_pci_register_driver(&amd74xx_pci_driver);
331}
332
333static void __exit amd74xx_ide_exit(void)
334{
335 pci_unregister_driver(&amd74xx_pci_driver);
336}
337
338module_init(amd74xx_ide_init);
339module_exit(amd74xx_ide_exit);
340
341MODULE_AUTHOR("Vojtech Pavlik, Bartlomiej Zolnierkiewicz");
342MODULE_DESCRIPTION("AMD PCI IDE driver");
343MODULE_LICENSE("GPL");