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authorRoland Dreier <rolandd@cisco.com>2005-11-07 03:58:13 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 10:53:26 -0500
commitb0f7b8bc57ee90138a7c429951457027a90c326f (patch)
tree07f320bf7d240273faf64d02069488fb29761ae8 /arch/ppc/syslib/ppc440spe_pcie.c
parent41aace4fe81e3da52fa80b8380e5d2d084f77691 (diff)
[PATCH] ppc32: Add 440SPe support
Add support for the AMCC PowerPC 440SPe SoC, including PCI Express in root port mode. Signed-off-by: Roland Dreier <rolandd@cisco.com> Cc: Matt Porter <mporter@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/ppc/syslib/ppc440spe_pcie.c')
-rw-r--r--arch/ppc/syslib/ppc440spe_pcie.c442
1 files changed, 442 insertions, 0 deletions
diff --git a/arch/ppc/syslib/ppc440spe_pcie.c b/arch/ppc/syslib/ppc440spe_pcie.c
new file mode 100644
index 000000000000..1509fc1ddfb6
--- /dev/null
+++ b/arch/ppc/syslib/ppc440spe_pcie.c
@@ -0,0 +1,442 @@
1/*
2 * Copyright (c) 2005 Cisco Systems. All rights reserved.
3 * Roland Dreier <rolandd@cisco.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 */
10
11#include <linux/config.h>
12#include <linux/kernel.h>
13#include <linux/delay.h>
14#include <linux/pci.h>
15#include <linux/init.h>
16
17#include <asm/reg.h>
18#include <asm/io.h>
19#include <asm/ibm44x.h>
20
21#include "ppc440spe_pcie.h"
22
23static int
24pcie_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
25 int len, u32 *val)
26{
27 struct pci_controller *hose = bus->sysdata;
28
29 if (PCI_SLOT(devfn) != 1)
30 return PCIBIOS_DEVICE_NOT_FOUND;
31
32 offset += devfn << 12;
33
34 /*
35 * Note: the caller has already checked that offset is
36 * suitably aligned and that len is 1, 2 or 4.
37 */
38 switch (len) {
39 case 1:
40 *val = in_8(hose->cfg_data + offset);
41 break;
42 case 2:
43 *val = in_le16(hose->cfg_data + offset);
44 break;
45 default:
46 *val = in_le32(hose->cfg_data + offset);
47 break;
48 }
49
50 if (0) printk("%s: read %x(%d) @ %x\n", __func__, *val, len, offset);
51
52 return PCIBIOS_SUCCESSFUL;
53}
54
55static int
56pcie_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
57 int len, u32 val)
58{
59 struct pci_controller *hose = bus->sysdata;
60
61 if (PCI_SLOT(devfn) != 1)
62 return PCIBIOS_DEVICE_NOT_FOUND;
63
64 offset += devfn << 12;
65
66 switch (len) {
67 case 1:
68 out_8(hose->cfg_data + offset, val);
69 break;
70 case 2:
71 out_le16(hose->cfg_data + offset, val);
72 break;
73 default:
74 out_le32(hose->cfg_data + offset, val);
75 break;
76 }
77 return PCIBIOS_SUCCESSFUL;
78}
79
80static struct pci_ops pcie_pci_ops =
81{
82 .read = pcie_read_config,
83 .write = pcie_write_config
84};
85
86enum {
87 PTYPE_ENDPOINT = 0x0,
88 PTYPE_LEGACY_ENDPOINT = 0x1,
89 PTYPE_ROOT_PORT = 0x4,
90
91 LNKW_X1 = 0x1,
92 LNKW_X4 = 0x4,
93 LNKW_X8 = 0x8
94};
95
96static void check_error(void)
97{
98 u32 valPE0, valPE1, valPE2;
99
100 /* SDR0_PEGPLLLCT1 reset */
101 if (!(valPE0 = SDR_READ(PESDR0_PLLLCT1) & 0x01000000)) {
102 printk(KERN_INFO "PCIE: SDR0_PEGPLLLCT1 reset error 0x%8x\n", valPE0);
103 }
104
105 valPE0 = SDR_READ(PESDR0_RCSSET);
106 valPE1 = SDR_READ(PESDR1_RCSSET);
107 valPE2 = SDR_READ(PESDR2_RCSSET);
108
109 /* SDR0_PExRCSSET rstgu */
110 if ( !(valPE0 & 0x01000000) ||
111 !(valPE1 & 0x01000000) ||
112 !(valPE2 & 0x01000000)) {
113 printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstgu error\n");
114 }
115
116 /* SDR0_PExRCSSET rstdl */
117 if ( !(valPE0 & 0x00010000) ||
118 !(valPE1 & 0x00010000) ||
119 !(valPE2 & 0x00010000)) {
120 printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstdl error\n");
121 }
122
123 /* SDR0_PExRCSSET rstpyn */
124 if ( (valPE0 & 0x00001000) ||
125 (valPE1 & 0x00001000) ||
126 (valPE2 & 0x00001000)) {
127 printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstpyn error\n");
128 }
129
130 /* SDR0_PExRCSSET hldplb */
131 if ( (valPE0 & 0x10000000) ||
132 (valPE1 & 0x10000000) ||
133 (valPE2 & 0x10000000)) {
134 printk(KERN_INFO "PCIE: SDR0_PExRCSSET hldplb error\n");
135 }
136
137 /* SDR0_PExRCSSET rdy */
138 if ( (valPE0 & 0x00100000) ||
139 (valPE1 & 0x00100000) ||
140 (valPE2 & 0x00100000)) {
141 printk(KERN_INFO "PCIE: SDR0_PExRCSSET rdy error\n");
142 }
143
144 /* SDR0_PExRCSSET shutdown */
145 if ( (valPE0 & 0x00000100) ||
146 (valPE1 & 0x00000100) ||
147 (valPE2 & 0x00000100)) {
148 printk(KERN_INFO "PCIE: SDR0_PExRCSSET shutdown error\n");
149 }
150}
151
152/*
153 * Initialize PCI Express core as described in User Manual section 27.12.1
154 */
155int ppc440spe_init_pcie(void)
156{
157 /* Set PLL clock receiver to LVPECL */
158 SDR_WRITE(PESDR0_PLLLCT1, SDR_READ(PESDR0_PLLLCT1) | 1 << 28);
159
160 check_error();
161
162 printk(KERN_INFO "PCIE initialization OK\n");
163
164 if (!(SDR_READ(PESDR0_PLLLCT2) & 0x10000))
165 printk(KERN_INFO "PESDR_PLLCT2 resistance calibration failed (0x%08x)\n",
166 SDR_READ(PESDR0_PLLLCT2));
167
168 /* De-assert reset of PCIe PLL, wait for lock */
169 SDR_WRITE(PESDR0_PLLLCT1, SDR_READ(PESDR0_PLLLCT1) & ~(1 << 24));
170 udelay(3);
171
172 return 0;
173}
174
175int ppc440spe_init_pcie_rootport(int port)
176{
177 static int core_init;
178 void __iomem *utl_base;
179 u32 val = 0;
180 int i;
181
182 if (!core_init) {
183 ++core_init;
184 i = ppc440spe_init_pcie();
185 if (i)
186 return i;
187 }
188
189 /*
190 * Initialize various parts of the PCI Express core for our port:
191 *
192 * - Set as a root port and enable max width
193 * (PXIE0 -> X8, PCIE1 and PCIE2 -> X4).
194 * - Set up UTL configuration.
195 * - Increase SERDES drive strength to levels suggested by AMCC.
196 * - De-assert RSTPYN, RSTDL and RSTGU.
197 */
198 switch (port) {
199 case 0:
200 SDR_WRITE(PESDR0_DLPSET, PTYPE_ROOT_PORT << 20 | LNKW_X8 << 12);
201
202 SDR_WRITE(PESDR0_UTLSET1, 0x21222222);
203 SDR_WRITE(PESDR0_UTLSET2, 0x11000000);
204
205 SDR_WRITE(PESDR0_HSSL0SET1, 0x35000000);
206 SDR_WRITE(PESDR0_HSSL1SET1, 0x35000000);
207 SDR_WRITE(PESDR0_HSSL2SET1, 0x35000000);
208 SDR_WRITE(PESDR0_HSSL3SET1, 0x35000000);
209 SDR_WRITE(PESDR0_HSSL4SET1, 0x35000000);
210 SDR_WRITE(PESDR0_HSSL5SET1, 0x35000000);
211 SDR_WRITE(PESDR0_HSSL6SET1, 0x35000000);
212 SDR_WRITE(PESDR0_HSSL7SET1, 0x35000000);
213
214 SDR_WRITE(PESDR0_RCSSET,
215 (SDR_READ(PESDR0_RCSSET) & ~(1 << 24 | 1 << 16)) | 1 << 12);
216 break;
217
218 case 1:
219 SDR_WRITE(PESDR1_DLPSET, PTYPE_ROOT_PORT << 20 | LNKW_X4 << 12);
220
221 SDR_WRITE(PESDR1_UTLSET1, 0x21222222);
222 SDR_WRITE(PESDR1_UTLSET2, 0x11000000);
223
224 SDR_WRITE(PESDR1_HSSL0SET1, 0x35000000);
225 SDR_WRITE(PESDR1_HSSL1SET1, 0x35000000);
226 SDR_WRITE(PESDR1_HSSL2SET1, 0x35000000);
227 SDR_WRITE(PESDR1_HSSL3SET1, 0x35000000);
228
229 SDR_WRITE(PESDR1_RCSSET,
230 (SDR_READ(PESDR1_RCSSET) & ~(1 << 24 | 1 << 16)) | 1 << 12);
231 break;
232
233 case 2:
234 SDR_WRITE(PESDR2_DLPSET, PTYPE_ROOT_PORT << 20 | LNKW_X4 << 12);
235
236 SDR_WRITE(PESDR2_UTLSET1, 0x21222222);
237 SDR_WRITE(PESDR2_UTLSET2, 0x11000000);
238
239 SDR_WRITE(PESDR2_HSSL0SET1, 0x35000000);
240 SDR_WRITE(PESDR2_HSSL1SET1, 0x35000000);
241 SDR_WRITE(PESDR2_HSSL2SET1, 0x35000000);
242 SDR_WRITE(PESDR2_HSSL3SET1, 0x35000000);
243
244 SDR_WRITE(PESDR2_RCSSET,
245 (SDR_READ(PESDR2_RCSSET) & ~(1 << 24 | 1 << 16)) | 1 << 12);
246 break;
247 }
248
249 mdelay(1000);
250
251 switch (port) {
252 case 0: val = SDR_READ(PESDR0_RCSSTS); break;
253 case 1: val = SDR_READ(PESDR1_RCSSTS); break;
254 case 2: val = SDR_READ(PESDR2_RCSSTS); break;
255 }
256
257 if (!(val & (1 << 20)))
258 printk(KERN_INFO "PCIE%d: PGRST inactive\n", port);
259 else
260 printk(KERN_WARNING "PGRST for PCIE%d failed %08x\n", port, val);
261
262 switch (port) {
263 case 0: printk(KERN_INFO "PCIE0: LOOP %08x\n", SDR_READ(PESDR0_LOOP)); break;
264 case 1: printk(KERN_INFO "PCIE1: LOOP %08x\n", SDR_READ(PESDR1_LOOP)); break;
265 case 2: printk(KERN_INFO "PCIE2: LOOP %08x\n", SDR_READ(PESDR2_LOOP)); break;
266 }
267
268 /*
269 * Map UTL registers at 0xc_1000_0n00
270 */
271 switch (port) {
272 case 0:
273 mtdcr(DCRN_PEGPL_REGBAH(PCIE0), 0x0000000c);
274 mtdcr(DCRN_PEGPL_REGBAL(PCIE0), 0x10000000);
275 mtdcr(DCRN_PEGPL_REGMSK(PCIE0), 0x00007001);
276 mtdcr(DCRN_PEGPL_SPECIAL(PCIE0), 0x68782800);
277 break;
278
279 case 1:
280 mtdcr(DCRN_PEGPL_REGBAH(PCIE1), 0x0000000c);
281 mtdcr(DCRN_PEGPL_REGBAL(PCIE1), 0x10001000);
282 mtdcr(DCRN_PEGPL_REGMSK(PCIE1), 0x00007001);
283 mtdcr(DCRN_PEGPL_SPECIAL(PCIE1), 0x68782800);
284 break;
285
286 case 2:
287 mtdcr(DCRN_PEGPL_REGBAH(PCIE2), 0x0000000c);
288 mtdcr(DCRN_PEGPL_REGBAL(PCIE2), 0x10002000);
289 mtdcr(DCRN_PEGPL_REGMSK(PCIE2), 0x00007001);
290 mtdcr(DCRN_PEGPL_SPECIAL(PCIE2), 0x68782800);
291 }
292
293 utl_base = ioremap64(0xc10000000ull + 0x1000 * port, 0x100);
294
295 /*
296 * Set buffer allocations and then assert VRB and TXE.
297 */
298 out_be32(utl_base + PEUTL_OUTTR, 0x08000000);
299 out_be32(utl_base + PEUTL_INTR, 0x02000000);
300 out_be32(utl_base + PEUTL_OPDBSZ, 0x10000000);
301 out_be32(utl_base + PEUTL_PBBSZ, 0x53000000);
302 out_be32(utl_base + PEUTL_IPHBSZ, 0x08000000);
303 out_be32(utl_base + PEUTL_IPDBSZ, 0x10000000);
304 out_be32(utl_base + PEUTL_RCIRQEN, 0x00f00000);
305 out_be32(utl_base + PEUTL_PCTL, 0x80800066);
306
307 iounmap(utl_base);
308
309 /*
310 * We map PCI Express configuration access into the 512MB regions
311 * PCIE0: 0xc_4000_0000
312 * PCIE1: 0xc_8000_0000
313 * PCIE2: 0xc_c000_0000
314 */
315 switch (port) {
316 case 0:
317 mtdcr(DCRN_PEGPL_CFGBAH(PCIE0), 0x0000000c);
318 mtdcr(DCRN_PEGPL_CFGBAL(PCIE0), 0x40000000);
319 mtdcr(DCRN_PEGPL_CFGMSK(PCIE0), 0xe0000001); /* 512MB region, valid */
320 break;
321
322 case 1:
323 mtdcr(DCRN_PEGPL_CFGBAH(PCIE1), 0x0000000c);
324 mtdcr(DCRN_PEGPL_CFGBAL(PCIE1), 0x80000000);
325 mtdcr(DCRN_PEGPL_CFGMSK(PCIE1), 0xe0000001); /* 512MB region, valid */
326 break;
327
328 case 2:
329 mtdcr(DCRN_PEGPL_CFGBAH(PCIE2), 0x0000000c);
330 mtdcr(DCRN_PEGPL_CFGBAL(PCIE2), 0xc0000000);
331 mtdcr(DCRN_PEGPL_CFGMSK(PCIE2), 0xe0000001); /* 512MB region, valid */
332 break;
333 }
334
335 /*
336 * Check for VC0 active and assert RDY.
337 */
338 switch (port) {
339 case 0:
340 if (!(SDR_READ(PESDR0_RCSSTS) & (1 << 16)))
341 printk(KERN_WARNING "PCIE0: VC0 not active\n");
342 SDR_WRITE(PESDR0_RCSSET, SDR_READ(PESDR0_RCSSET) | 1 << 20);
343 break;
344 case 1:
345 if (!(SDR_READ(PESDR1_RCSSTS) & (1 << 16)))
346 printk(KERN_WARNING "PCIE0: VC0 not active\n");
347 SDR_WRITE(PESDR1_RCSSET, SDR_READ(PESDR1_RCSSET) | 1 << 20);
348 break;
349 case 2:
350 if (!(SDR_READ(PESDR2_RCSSTS) & (1 << 16)))
351 printk(KERN_WARNING "PCIE0: VC0 not active\n");
352 SDR_WRITE(PESDR2_RCSSET, SDR_READ(PESDR2_RCSSET) | 1 << 20);
353 break;
354 }
355
356#if 0
357 /* Dump all config regs */
358 for (i = 0x300; i <= 0x320; ++i)
359 printk("[%04x] 0x%08x\n", i, SDR_READ(i));
360 for (i = 0x340; i <= 0x353; ++i)
361 printk("[%04x] 0x%08x\n", i, SDR_READ(i));
362 for (i = 0x370; i <= 0x383; ++i)
363 printk("[%04x] 0x%08x\n", i, SDR_READ(i));
364 for (i = 0x3a0; i <= 0x3a2; ++i)
365 printk("[%04x] 0x%08x\n", i, SDR_READ(i));
366 for (i = 0x3c0; i <= 0x3c3; ++i)
367 printk("[%04x] 0x%08x\n", i, SDR_READ(i));
368#endif
369
370 mdelay(100);
371
372 return 0;
373}
374
375void ppc440spe_setup_pcie(struct pci_controller *hose, int port)
376{
377 void __iomem *mbase;
378
379 /*
380 * Map 16MB, which is enough for 4 bits of bus #
381 */
382 hose->cfg_data = ioremap64(0xc40000000ull + port * 0x40000000,
383 1 << 24);
384 hose->ops = &pcie_pci_ops;
385
386 /*
387 * Set bus numbers on our root port
388 */
389 mbase = ioremap64(0xc50000000ull + port * 0x40000000, 4096);
390 out_8(mbase + PCI_PRIMARY_BUS, 0);
391 out_8(mbase + PCI_SECONDARY_BUS, 0);
392
393 /*
394 * Set up outbound translation to hose->mem_space from PLB
395 * addresses at an offset of 0xd_0000_0000. We set the low
396 * bits of the mask to 11 to turn off splitting into 8
397 * subregions and to enable the outbound translation.
398 */
399 out_le32(mbase + PECFG_POM0LAH, 0);
400 out_le32(mbase + PECFG_POM0LAL, hose->mem_space.start);
401
402 switch (port) {
403 case 0:
404 mtdcr(DCRN_PEGPL_OMR1BAH(PCIE0), 0x0000000d);
405 mtdcr(DCRN_PEGPL_OMR1BAL(PCIE0), hose->mem_space.start);
406 mtdcr(DCRN_PEGPL_OMR1MSKH(PCIE0), 0x7fffffff);
407 mtdcr(DCRN_PEGPL_OMR1MSKL(PCIE0),
408 ~(hose->mem_space.end - hose->mem_space.start) | 3);
409 break;
410 case 1:
411 mtdcr(DCRN_PEGPL_OMR1BAH(PCIE1), 0x0000000d);
412 mtdcr(DCRN_PEGPL_OMR1BAL(PCIE1), hose->mem_space.start);
413 mtdcr(DCRN_PEGPL_OMR1MSKH(PCIE1), 0x7fffffff);
414 mtdcr(DCRN_PEGPL_OMR1MSKL(PCIE1),
415 ~(hose->mem_space.end - hose->mem_space.start) | 3);
416
417 break;
418 case 2:
419 mtdcr(DCRN_PEGPL_OMR1BAH(PCIE2), 0x0000000d);
420 mtdcr(DCRN_PEGPL_OMR1BAL(PCIE2), hose->mem_space.start);
421 mtdcr(DCRN_PEGPL_OMR1MSKH(PCIE2), 0x7fffffff);
422 mtdcr(DCRN_PEGPL_OMR1MSKL(PCIE2),
423 ~(hose->mem_space.end - hose->mem_space.start) | 3);
424 break;
425 }
426
427 /* Set up 16GB inbound memory window at 0 */
428 out_le32(mbase + PCI_BASE_ADDRESS_0, 0);
429 out_le32(mbase + PCI_BASE_ADDRESS_1, 0);
430 out_le32(mbase + PECFG_BAR0HMPA, 0x7fffffc);
431 out_le32(mbase + PECFG_BAR0LMPA, 0);
432 out_le32(mbase + PECFG_PIM0LAL, 0);
433 out_le32(mbase + PECFG_PIM0LAH, 0);
434 out_le32(mbase + PECFG_PIMEN, 0x1);
435
436 /* Enable I/O, Mem, and Busmaster cycles */
437 out_le16(mbase + PCI_COMMAND,
438 in_le16(mbase + PCI_COMMAND) |
439 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
440
441 iounmap(mbase);
442}
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