2 * Copyright 2009-2011 Freescale Semiconductor, Inc.
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 #ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
27 #include <asm/fsl_serdes.h>
28 #include <asm/immap_85xx.h>
30 #include <asm/processor.h>
31 #include <asm/fsl_law.h>
32 #include "fsl_corenet_serdes.h"
34 static u32 serdes_prtcl_map
;
36 #define HWCONFIG_BUFFER_SIZE 128
39 static const char *serdes_prtcl_str
[] = {
49 [SGMII_FM1_DTSEC1
] = "SGMII_FM1_DTSEC1",
50 [SGMII_FM1_DTSEC2
] = "SGMII_FM1_DTSEC2",
51 [SGMII_FM1_DTSEC3
] = "SGMII_FM1_DTSEC3",
52 [SGMII_FM1_DTSEC4
] = "SGMII_FM1_DTSEC4",
53 [SGMII_FM1_DTSEC5
] = "SGMII_FM1_DTSEC5",
54 [SGMII_FM2_DTSEC1
] = "SGMII_FM2_DTSEC1",
55 [SGMII_FM2_DTSEC2
] = "SGMII_FM2_DTSEC2",
56 [SGMII_FM2_DTSEC3
] = "SGMII_FM2_DTSEC3",
57 [SGMII_FM2_DTSEC4
] = "SGMII_FM2_DTSEC4",
58 [XAUI_FM1
] = "XAUI_FM1",
59 [XAUI_FM2
] = "XAUI_FM2",
66 unsigned int lpd
; /* RCW lane powerdown bit */
68 } lanes
[SRDS_MAX_LANES
] = {
69 { 0, 152, FSL_SRDS_BANK_1
},
70 { 1, 153, FSL_SRDS_BANK_1
},
71 { 2, 154, FSL_SRDS_BANK_1
},
72 { 3, 155, FSL_SRDS_BANK_1
},
73 { 4, 156, FSL_SRDS_BANK_1
},
74 { 5, 157, FSL_SRDS_BANK_1
},
75 { 6, 158, FSL_SRDS_BANK_1
},
76 { 7, 159, FSL_SRDS_BANK_1
},
77 { 8, 160, FSL_SRDS_BANK_1
},
78 { 9, 161, FSL_SRDS_BANK_1
},
79 { 16, 162, FSL_SRDS_BANK_2
},
80 { 17, 163, FSL_SRDS_BANK_2
},
81 { 18, 164, FSL_SRDS_BANK_2
},
82 { 19, 165, FSL_SRDS_BANK_2
},
83 { 20, 170, FSL_SRDS_BANK_3
},
84 { 21, 171, FSL_SRDS_BANK_3
},
85 { 22, 172, FSL_SRDS_BANK_3
},
86 { 23, 173, FSL_SRDS_BANK_3
},
89 int serdes_get_lane_idx(int lane
)
91 return lanes
[lane
].idx
;
94 int serdes_get_bank(int lane
)
96 return lanes
[lane
].bank
;
99 int serdes_lane_enabled(int lane
)
101 ccsr_gur_t
*gur
= (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR
);
102 serdes_corenet_t
*regs
= (void *)CONFIG_SYS_FSL_CORENET_SERDES_ADDR
;
104 int bank
= lanes
[lane
].bank
;
105 int word
= lanes
[lane
].lpd
/ 32;
106 int bit
= lanes
[lane
].lpd
% 32;
108 if (in_be32(®s
->bank
[bank
].rstctl
) & SRDS_RSTCTL_SDPD
)
111 #ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
113 * For banks two and three, use the srds_lpd_b[] array instead of the
114 * RCW, because this array contains the real values of SRDS_LPD_B2 and
118 return !(srds_lpd_b
[bank
] & (8 >> (lane
- (6 + 4 * bank
))));
121 return !(in_be32(&gur
->rcwsr
[word
]) & (0x80000000 >> bit
));
124 int is_serdes_configured(enum srds_prtcl device
)
126 ccsr_gur_t
*gur
= (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR
);
128 /* Is serdes enabled at all? */
129 if (!(in_be32(&gur
->rcwsr
[5]) & FSL_CORENET_RCWSR5_SRDS_EN
))
132 return (1 << device
) & serdes_prtcl_map
;
135 #ifndef CONFIG_SYS_DCSRBAR_PHYS
136 #define CONFIG_SYS_DCSRBAR_PHYS 0x80000000 /* Must be 1GB-aligned for rev1.0 */
137 #define CONFIG_SYS_DCSRBAR 0x80000000
138 #define __DCSR_NOT_DEFINED_BY_CONFIG
141 #ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
142 static void enable_bank(ccsr_gur_t
*gur
, int bank
)
147 * Enable the lanes SRDS_LPD_Bn. The RCW bits are read-only in
148 * CCSR, and read/write in DSCR.
150 rcw5
= in_be32(gur
->rcwsr
+ 5);
151 if (bank
== FSL_SRDS_BANK_2
) {
152 rcw5
&= ~FSL_CORENET_RCWSRn_SRDS_LPD_B2
;
153 rcw5
|= srds_lpd_b
[bank
] << 26;
154 } else if (bank
== FSL_SRDS_BANK_3
) {
155 rcw5
&= ~FSL_CORENET_RCWSRn_SRDS_LPD_B3
;
156 rcw5
|= srds_lpd_b
[bank
] << 18;
158 printf("SERDES: enable_bank: bad bank %d\n", bank
+ 1);
162 /* See similar code in cpu/mpc85xx/cpu_init.c for an explanation
163 * of the DCSR mapping.
166 #ifdef __DCSR_NOT_DEFINED_BY_CONFIG
167 struct law_entry law
= find_law(CONFIG_SYS_DCSRBAR_PHYS
);
170 law_index
= set_next_law(CONFIG_SYS_DCSRBAR_PHYS
,
171 LAW_SIZE_1M
, LAW_TRGT_IF_DCSR
);
173 set_law(law
.index
, CONFIG_SYS_DCSRBAR_PHYS
, LAW_SIZE_1M
,
176 u32
*p
= (void *)CONFIG_SYS_DCSRBAR
+ 0x20114;
178 #ifdef __DCSR_NOT_DEFINED_BY_CONFIG
180 disable_law(law_index
);
182 set_law(law
.index
, law
.addr
, law
.size
, law
.trgt_id
);
188 * To avoid problems with clock jitter, rev 2 p4080 uses the pll from
189 * bank 3 to clock banks 2 and 3, as well as a limited selection of
190 * protocol configurations. This requires that banks 2 and 3's lanes be
191 * disabled in the RCW, and enabled with some fixup here to re-enable
192 * them, and to configure bank 2's clock parameters in bank 3's pll in
193 * cases where they differ.
195 static void p4080_erratum_serdes8(serdes_corenet_t
*regs
, ccsr_gur_t
*gur
,
196 u32 devdisr
, u32 devdisr2
, int cfg
)
202 * The disabled lanes of bank 2 will cause the associated
203 * logic blocks to be disabled in DEVDISR. We reverse that here.
205 * Note that normally it is not permitted to clear DEVDISR bits
206 * once the device has been disabled, but the hardware people
207 * say that this special case is OK.
209 clrbits_be32(&gur
->devdisr
, devdisr
);
210 clrbits_be32(&gur
->devdisr2
, devdisr2
);
213 * Some protocols require special handling. There are a few
214 * additional protocol configurations that can be used, which are
215 * not listed here. See app note 4065 for supported protocol
221 * Bank 2 has PCIe which wants BWSEL -- tell bank 3's PLL.
222 * SGMII on bank 3 should still be usable.
224 setbits_be32(®s
->bank
[FSL_SRDS_BANK_3
].pllcr1
,
225 SRDS_PLLCR1_PLL_BWSEL
);
227 enable_bank(gur
, FSL_SRDS_BANK_3
);
233 * Banks 2 (XAUI) and 3 (SGMII) have different clocking
234 * requirements in these configurations. Bank 3 cannot
235 * be used and should have its lanes (but not the bank
236 * itself) disabled in the RCW. We set up bank 3's pll
237 * for bank 2's needs here.
239 srds_ratio_b2
= (in_be32(&gur
->rcwsr
[4]) >> 13) & 7;
241 /* Determine refclock from XAUI ratio */
242 switch (srds_ratio_b2
) {
244 rfck_sel
= SRDS_PLLCR0_RFCK_SEL_156_25
;
247 rfck_sel
= SRDS_PLLCR0_RFCK_SEL_125
;
250 printf("SERDES: bad SRDS_RATIO_B2 %d\n",
255 clrsetbits_be32(®s
->bank
[FSL_SRDS_BANK_3
].pllcr0
,
256 SRDS_PLLCR0_RFCK_SEL_MASK
, rfck_sel
);
258 clrsetbits_be32(®s
->bank
[FSL_SRDS_BANK_3
].pllcr0
,
259 SRDS_PLLCR0_FRATE_SEL_MASK
,
260 SRDS_PLLCR0_FRATE_SEL_6_25
);
263 enable_bank(gur
, FSL_SRDS_BANK_3
);
269 void fsl_serdes_init(void)
271 ccsr_gur_t
*gur
= (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR
);
273 serdes_corenet_t
*srds_regs
;
275 enum srds_prtcl lane_prtcl
;
277 int have_bank
[SRDS_MAX_BANK
] = {};
278 #ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
279 u32 serdes8_devdisr
= 0;
280 u32 serdes8_devdisr2
= 0;
281 char srds_lpd_opt
[16];
282 const char *srds_lpd_arg
;
285 char buffer
[HWCONFIG_BUFFER_SIZE
];
289 * Extract hwconfig from environment since we have not properly setup
290 * the environment but need it for ddr config params
292 if (getenv_f("hwconfig", buffer
, sizeof(buffer
)) > 0)
295 /* Is serdes enabled at all? */
296 if (!(in_be32(&gur
->rcwsr
[5]) & FSL_CORENET_RCWSR5_SRDS_EN
))
299 srds_regs
= (void *)(CONFIG_SYS_FSL_CORENET_SERDES_ADDR
);
300 cfg
= (in_be32(&gur
->rcwsr
[4]) & FSL_CORENET_RCWSR4_SRDS_PRTCL
) >> 26;
301 debug("Using SERDES configuration 0x%x, lane settings:\n", cfg
);
303 if (!is_serdes_prtcl_valid(cfg
)) {
304 printf("SERDES[PRTCL] = 0x%x is not valid\n", cfg
);
308 #ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
310 * Store the values of the fsl_srds_lpd_b2 and fsl_srds_lpd_b3
311 * hwconfig options into the srds_lpd_b[] array. See README.p4080ds
312 * for a description of these options.
314 for (bank
= 1; bank
< ARRAY_SIZE(srds_lpd_b
); bank
++) {
315 sprintf(srds_lpd_opt
, "fsl_srds_lpd_b%u", bank
+ 1);
317 hwconfig_subarg_f("serdes", srds_lpd_opt
, &arglen
, buf
);
320 simple_strtoul(srds_lpd_arg
, NULL
, 0) & 0xf;
324 /* Look for banks with all lanes disabled, and power down the bank. */
325 for (lane
= 0; lane
< SRDS_MAX_LANES
; lane
++) {
326 enum srds_prtcl lane_prtcl
= serdes_get_prtcl(cfg
, lane
);
327 if (serdes_lane_enabled(lane
)) {
328 have_bank
[serdes_get_bank(lane
)] = 1;
329 serdes_prtcl_map
|= (1 << lane_prtcl
);
333 #ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
335 * Bank two uses the clock from bank three, so if bank two is enabled,
336 * then bank three must also be enabled.
338 if (have_bank
[FSL_SRDS_BANK_2
])
339 have_bank
[FSL_SRDS_BANK_3
] = 1;
342 for (bank
= 0; bank
< SRDS_MAX_BANK
; bank
++) {
343 if (!have_bank
[bank
]) {
344 printf("SERDES: bank %d disabled\n", bank
+ 1);
345 setbits_be32(&srds_regs
->bank
[bank
].rstctl
,
350 for (lane
= 0; lane
< SRDS_MAX_LANES
; lane
++) {
351 idx
= serdes_get_lane_idx(lane
);
352 lane_prtcl
= serdes_get_prtcl(cfg
, lane
);
369 printf("%s ", serdes_prtcl_str
[lane_prtcl
]);
372 #ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
373 switch (lane_prtcl
) {
377 serdes8_devdisr
|= FSL_CORENET_DEVDISR_PCIE1
>>
378 (lane_prtcl
- PCIE1
);
382 serdes8_devdisr
|= FSL_CORENET_DEVDISR_SRIO1
>>
383 (lane_prtcl
- SRIO1
);
385 case SGMII_FM1_DTSEC1
:
386 serdes8_devdisr2
|= FSL_CORENET_DEVDISR2_FM1
|
387 FSL_CORENET_DEVDISR2_DTSEC1_1
;
389 case SGMII_FM1_DTSEC2
:
390 serdes8_devdisr2
|= FSL_CORENET_DEVDISR2_FM1
|
391 FSL_CORENET_DEVDISR2_DTSEC1_2
;
393 case SGMII_FM1_DTSEC3
:
394 serdes8_devdisr2
|= FSL_CORENET_DEVDISR2_FM1
|
395 FSL_CORENET_DEVDISR2_DTSEC1_3
;
397 case SGMII_FM1_DTSEC4
:
398 serdes8_devdisr2
|= FSL_CORENET_DEVDISR2_FM1
|
399 FSL_CORENET_DEVDISR2_DTSEC1_4
;
401 case SGMII_FM2_DTSEC1
:
402 serdes8_devdisr2
|= FSL_CORENET_DEVDISR2_FM2
|
403 FSL_CORENET_DEVDISR2_DTSEC2_1
;
405 case SGMII_FM2_DTSEC2
:
406 serdes8_devdisr2
|= FSL_CORENET_DEVDISR2_FM2
|
407 FSL_CORENET_DEVDISR2_DTSEC2_2
;
409 case SGMII_FM2_DTSEC3
:
410 serdes8_devdisr2
|= FSL_CORENET_DEVDISR2_FM2
|
411 FSL_CORENET_DEVDISR2_DTSEC2_3
;
413 case SGMII_FM2_DTSEC4
:
414 serdes8_devdisr2
|= FSL_CORENET_DEVDISR2_FM2
|
415 FSL_CORENET_DEVDISR2_DTSEC2_4
;
419 if (lane_prtcl
== XAUI_FM1
)
420 serdes8_devdisr2
|= FSL_CORENET_DEVDISR2_FM1
|
421 FSL_CORENET_DEVDISR2_10GEC1
;
423 serdes8_devdisr2
|= FSL_CORENET_DEVDISR2_FM2
|
424 FSL_CORENET_DEVDISR2_10GEC2
;
439 for (idx
= 0; idx
< SRDS_MAX_BANK
; idx
++) {
444 #ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
446 * Change bank init order to 0, 2, 1, so that the third bank's
447 * PLL is established before we start the second bank. The
448 * second bank uses the third bank's PLL.
452 bank
= FSL_SRDS_BANK_3
;
454 bank
= FSL_SRDS_BANK_2
;
457 /* Skip disabled banks */
458 if (!have_bank
[bank
])
461 #ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
464 * Re-enable devices on banks two and three that were
465 * disabled by the RCW, and then enable bank three. The
466 * devices need to be enabled before either bank is
469 p4080_erratum_serdes8(srds_regs
, gur
, serdes8_devdisr
,
470 serdes8_devdisr2
, cfg
);
471 } else if (idx
== 2) {
472 /* Eable bank two now that bank three is enabled. */
473 enable_bank(gur
, FSL_SRDS_BANK_2
);
477 /* reset banks for errata */
478 setbits_be32(&srds_regs
->bank
[bank
].rstctl
, SRDS_RSTCTL_RST
);
480 /* wait for reset complete or 1-second timeout */
481 end_tick
= usec2ticks(1000000) + get_ticks();
483 rstctl
= in_be32(&srds_regs
->bank
[bank
].rstctl
);
484 if (rstctl
& SRDS_RSTCTL_RSTDONE
)
486 } while (end_tick
> get_ticks());
488 if (!(rstctl
& SRDS_RSTCTL_RSTDONE
)) {
489 printf("SERDES: timeout resetting bank %d\n",