2 * (C) Copyright 2003-2004
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * Mark Jonas, Freescale Semiconductor, mark.jonas@motorola.com.
11 * Copyright 2012-2013 Stefan Roese <sr@denx.de>
13 * SPDX-License-Identifier: GPL-2.0+
21 #include <linux/compiler.h>
22 #include <asm/processor.h>
26 #include "is46r16320d.h"
28 #include "mt46v16m16-75.h"
31 DECLARE_GLOBAL_DATA_PTR
;
33 #if !defined(CONFIG_SYS_RAMBOOT) && \
34 (defined(CONFIG_SPL) && defined(CONFIG_SPL_BUILD))
35 static void sdram_start(int hi_addr
)
37 long hi_addr_bit
= hi_addr
? 0x01000000 : 0;
38 long control
= SDRAM_CONTROL
| hi_addr_bit
;
40 /* unlock mode register */
41 out_be32((void *)MPC5XXX_SDRAM_CTRL
, control
| 0x80000000);
43 /* precharge all banks */
44 out_be32((void *)MPC5XXX_SDRAM_CTRL
, control
| 0x80000002);
47 /* set mode register: extended mode */
48 out_be32((void *)MPC5XXX_SDRAM_MODE
, SDRAM_EMODE
);
50 /* set mode register: reset DLL */
51 out_be32((void *)MPC5XXX_SDRAM_MODE
, SDRAM_MODE
| 0x04000000);
54 /* precharge all banks */
55 out_be32((void *)MPC5XXX_SDRAM_CTRL
, control
| 0x80000002);
58 out_be32((void *)MPC5XXX_SDRAM_CTRL
, control
| 0x80000004);
60 /* set mode register */
61 out_be32((void *)MPC5XXX_SDRAM_MODE
, SDRAM_MODE
);
63 /* normal operation */
64 out_be32((void *)MPC5XXX_SDRAM_CTRL
, control
);
67 * Wait a short while for the DLL to lock before accessing
75 * ATTENTION: Although partially referenced initdram does NOT make real use
76 * use of CONFIG_SYS_SDRAM_BASE. The code does not work if
77 * CONFIG_SYS_SDRAM_BASE is something else than 0x00000000.
79 phys_size_t
initdram(int board_type
)
84 #if !defined(CONFIG_SYS_RAMBOOT) && \
85 (defined(CONFIG_SPL) && defined(CONFIG_SPL_BUILD))
88 /* setup SDRAM chip selects */
89 out_be32((void *)MPC5XXX_SDRAM_CS0CFG
, 0x0000001e); /* 2GB at 0x0 */
90 out_be32((void *)MPC5XXX_SDRAM_CS1CFG
, 0x80000000); /* disabled */
92 /* setup config registers */
93 out_be32((void *)MPC5XXX_SDRAM_CONFIG1
, SDRAM_CONFIG1
);
94 out_be32((void *)MPC5XXX_SDRAM_CONFIG2
, SDRAM_CONFIG2
);
98 out_be32((void *)MPC5XXX_CDM_PORCFG
, SDRAM_TAPDELAY
);
101 /* find RAM size using SDRAM CS0 only */
103 test1
= get_ram_size((long *)CONFIG_SYS_SDRAM_BASE
, 0x80000000);
105 test2
= get_ram_size((long *)CONFIG_SYS_SDRAM_BASE
, 0x80000000);
113 /* memory smaller than 1MB is impossible */
114 if (dramsize
< (1 << 20))
117 /* set SDRAM CS0 size according to the amount of RAM found */
119 out_be32((void *)MPC5XXX_SDRAM_CS0CFG
,
120 0x13 + __builtin_ffs(dramsize
>> 20) - 1);
122 out_be32((void *)MPC5XXX_SDRAM_CS0CFG
, 0); /* disabled */
124 #else /* CONFIG_SYS_RAMBOOT */
126 /* retrieve size of memory connected to SDRAM CS0 */
127 dramsize
= in_be32((void *)MPC5XXX_SDRAM_CS0CFG
) & 0xFF;
128 if (dramsize
>= 0x13)
129 dramsize
= (1 << (dramsize
- 0x13)) << 20;
133 /* retrieve size of memory connected to SDRAM CS1 */
134 dramsize2
= in_be32((void *)MPC5XXX_SDRAM_CS1CFG
) & 0xFF;
135 if (dramsize2
>= 0x13)
136 dramsize2
= (1 << (dramsize2
- 0x13)) << 20;
140 #endif /* CONFIG_SYS_RAMBOOT */
143 * On MPC5200B we need to set the special configuration delay in the
144 * DDR controller. Please refer to Freescale's AN3221 "MPC5200B SDRAM
145 * Initialization and Configuration", 3.3.1 SDelay--MBAR + 0x0190:
147 * "The SDelay should be written to a value of 0x00000004. It is
148 * required to account for changes caused by normal wafer processing
153 if ((SVR_MJREV(svr
) >= 2) && (PVR_MAJ(pvr
) == 1) && (PVR_MIN(pvr
) == 4))
154 out_be32((void *)MPC5XXX_SDRAM_SDELAY
, 0x04);
156 return dramsize
+ dramsize2
;
159 static void get_revisions(int *failsavelevel
, int *digiboardversion
,
162 struct mpc5xxx_gpt_0_7
*gpt
= (struct mpc5xxx_gpt_0_7
*)MPC5XXX_GPT
;
165 /* read digitalboard-version from TMR[2..4] */
167 val
|= (gpt
->gpt2
.sr
& (1 << (31 - 23))) ? (1) : 0;
168 val
|= (gpt
->gpt3
.sr
& (1 << (31 - 23))) ? (1 << 1) : 0;
169 val
|= (gpt
->gpt4
.sr
& (1 << (31 - 23))) ? (1 << 2) : 0;
170 *digiboardversion
= val
;
173 * A4M2K only supports digiboardversion. No failsavelevel and
176 #if !defined(CONFIG_A4M2K)
178 * Figure out failsavelevel
181 *failsavelevel
= 0; /* 0=failsave, 1=board ok, 2=fpga ok */
183 if (*digiboardversion
== 0) {
184 *failsavelevel
= 1; /* digiboard-version ok */
186 /* read fpga-version from TMR[5..7] */
188 val
|= (gpt
->gpt5
.sr
& (1 << (31 - 23))) ? (1) : 0;
189 val
|= (gpt
->gpt6
.sr
& (1 << (31 - 23))) ? (1 << 1) : 0;
190 val
|= (gpt
->gpt7
.sr
& (1 << (31 - 23))) ? (1 << 2) : 0;
193 if (*fpgaversion
== 1)
194 *failsavelevel
= 2; /* fpga-version ok */
200 * This function is called from the SPL U-Boot version for
201 * early init stuff, that needs to be done for OS (e.g. Linux)
202 * booting. Doing it later in the real U-Boot would not work
203 * in case that the SPL U-Boot boots Linux directly.
205 void spl_board_init(void)
207 struct mpc5xxx_gpio
*gpio
= (struct mpc5xxx_gpio
*)MPC5XXX_GPIO
;
208 struct mpc5xxx_mmap_ctl
*mm
=
209 (struct mpc5xxx_mmap_ctl
*)CONFIG_SYS_MBAR
;
211 #if defined(CONFIG_A4M2K)
212 /* enable CS3 and CS5 (FPGA) */
213 setbits_be32(&mm
->ipbi_ws_ctrl
, (1 << 19) | (1 << 21));
215 int digiboardversion
;
220 get_revisions(&failsavelevel
, &digiboardversion
, &fpgaversion
);
222 val
= in_be32(&mm
->ipbi_ws_ctrl
);
224 /* first clear bits 19..21 (CS3...5) */
225 val
&= ~((1 << 19) | (1 << 20) | (1 << 21));
226 if (failsavelevel
== 2) {
228 val
|= (1 << 19) | (1 << 21);
231 if (failsavelevel
>= 1) {
232 /* at least digiboard-version ok */
236 /* And write new value back to register */
237 out_be32(&mm
->ipbi_ws_ctrl
, val
);
240 /* Setup pin multiplexing */
241 if (failsavelevel
== 2) {
242 /* fpga-version ok */
243 #if defined(CONFIG_SYS_GPS_PORT_CONFIG_2)
244 out_be32(&gpio
->port_config
, CONFIG_SYS_GPS_PORT_CONFIG_2
);
246 } else if (failsavelevel
== 1) {
247 /* digiboard-version ok - fpga not */
248 #if defined(CONFIG_SYS_GPS_PORT_CONFIG_1)
249 out_be32(&gpio
->port_config
, CONFIG_SYS_GPS_PORT_CONFIG_1
);
252 /* full failsave-mode */
253 #if defined(CONFIG_SYS_GPS_PORT_CONFIG)
254 out_be32(&gpio
->port_config
, CONFIG_SYS_GPS_PORT_CONFIG
);
260 * Setup gpio_wkup_7 as watchdog AS INPUT to disable it - see
263 * MPC5XXX_WU_GPIO_DIR direction is already 0 (INPUT)
264 * set bit 0(msb) to 1
266 setbits_be32((void *)MPC5XXX_WU_GPIO_ENABLE
, CONFIG_WDOG_GPIO_PIN
);
268 #if defined(CONFIG_A4M2K)
269 /* Setup USB[x] as MPCDiag[0..3] GPIO outputs */
271 /* set USB0,6,7,8 (MPCDiag[0..3]) direction to output */
272 gpio
->simple_ddr
|= 1 << (31 - 15);
273 gpio
->simple_ddr
|= 1 << (31 - 14);
274 gpio
->simple_ddr
|= 1 << (31 - 13);
275 gpio
->simple_ddr
|= 1 << (31 - 12);
277 /* enable USB0,6,7,8 (MPCDiag[0..3]) as GPIO */
278 gpio
->simple_gpioe
|= 1 << (31 - 15);
279 gpio
->simple_gpioe
|= 1 << (31 - 14);
280 gpio
->simple_gpioe
|= 1 << (31 - 13);
281 gpio
->simple_gpioe
|= 1 << (31 - 12);
283 /* Setup PSC2[0..2] as STSLED[0..2] GPIO outputs */
285 /* set PSC2[0..2] (STSLED[0..2]) direction to output */
286 gpio
->simple_ddr
|= 1 << (31 - 27);
287 gpio
->simple_ddr
|= 1 << (31 - 26);
288 gpio
->simple_ddr
|= 1 << (31 - 25);
290 /* enable PSC2[0..2] (STSLED[0..2]) as GPIO */
291 gpio
->simple_gpioe
|= 1 << (31 - 27);
292 gpio
->simple_gpioe
|= 1 << (31 - 26);
293 gpio
->simple_gpioe
|= 1 << (31 - 25);
295 /* Setup PSC6[2] as MRST2 self reset GPIO output */
297 /* set PSC6[2]/IRDA_TX (MRST2) direction to output */
298 gpio
->simple_ddr
|= 1 << (31 - 3);
300 /* set PSC6[2]/IRDA_TX (MRST2) output as open drain */
301 gpio
->simple_ode
|= 1 << (31 - 3);
303 /* set PSC6[2]/IRDA_TX (MRST2) output as default high */
304 gpio
->simple_dvo
|= 1 << (31 - 3);
306 /* enable PSC6[2]/IRDA_TX (MRST2) as GPIO */
307 gpio
->simple_gpioe
|= 1 << (31 - 3);
309 /* Setup PSC6[3] as HARNSSCD harness code GPIO input */
311 /* set PSC6[3]/IR_USB_CLK (HARNSSCD) direction to input */
312 gpio
->simple_ddr
|= 0 << (31 - 2);
314 /* enable PSC6[3]/IR_USB_CLK (HARNSSCD) as GPIO */
315 gpio
->simple_gpioe
|= 1 << (31 - 2);
317 /* setup GPIOs for status-leds if needed - see ticket #57 */
318 if (failsavelevel
> 0) {
319 /* digiboard-version is OK */
320 /* LED is LOW ACTIVE - so deactivate by set output to 1 */
321 gpio
->simple_dvo
|= 1 << (31 - 12);
322 gpio
->simple_dvo
|= 1 << (31 - 13);
323 /* set GPIO direction to output */
324 gpio
->simple_ddr
|= 1 << (31 - 12);
325 gpio
->simple_ddr
|= 1 << (31 - 13);
326 /* open drain config is set to "normal output" at reset */
327 /* gpio->simple_ode &=~ ( 1 << (31-12) ); */
328 /* gpio->simple_ode &=~ ( 1 << (31-13) ); */
330 gpio
->simple_gpioe
|= 1 << (31 - 12);
331 gpio
->simple_gpioe
|= 1 << (31 - 13);
334 /* setup fpga irq - see ticket #65 */
335 if (failsavelevel
> 1) {
337 * The main irq initialisation is done in interrupts.c
340 struct mpc5xxx_intr
*intr
=
341 (struct mpc5xxx_intr
*)(MPC5XXX_ICTL
);
343 setbits_be32(&intr
->ctrl
, 0x08C01801);
346 * The MBAR+0x0524 Bit 21:23 CSe are ignored here due to the
347 * already cleared (intr_ctrl) MBAR+0x0510 ECLR[0] bit above
355 int digiboardversion
;
359 get_revisions(&failsavelevel
, &digiboardversion
, &fpgaversion
);
362 puts("Board: A4M2K\n");
363 printf(" digiboard IO version %u\n", digiboardversion
);
365 puts("Board: A3M071\n");
366 printf("Rev: failsave level %u\n", failsavelevel
);
367 printf(" digiboard IO version %u\n", digiboardversion
);
368 if (failsavelevel
> 0) /* only if fpga-version red */
369 printf(" fpga IO version %u\n", fpgaversion
);
375 /* miscellaneous platform dependent initialisations */
376 int misc_init_r(void)
378 /* adjust flash start and offset to detected values */
379 gd
->bd
->bi_flashstart
= flash_info
[0].start
[0];
380 gd
->bd
->bi_flashoffset
= 0;
383 out_be32((void *)MPC5XXX_BOOTCS_START
,
384 START_REG(gd
->bd
->bi_flashstart
));
385 out_be32((void *)MPC5XXX_CS0_START
, START_REG(gd
->bd
->bi_flashstart
));
386 out_be32((void *)MPC5XXX_BOOTCS_STOP
,
387 STOP_REG(gd
->bd
->bi_flashstart
, gd
->bd
->bi_flashsize
));
388 out_be32((void *)MPC5XXX_CS0_STOP
,
389 STOP_REG(gd
->bd
->bi_flashstart
, gd
->bd
->bi_flashsize
));
394 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
395 int ft_board_setup(void *blob
, bd_t
*bd
)
397 ft_cpu_setup(blob
, bd
);
401 #endif /* defined(CONFIG_OF_FLAT_TREE) && defined(CONFIG_OF_BOARD_SETUP) */
403 #ifdef CONFIG_SPL_OS_BOOT
405 * A3M071 specific implementation of spl_start_uboot()
408 * 0 if booting into OS is selected (default)
409 * 1 if booting into U-Boot is selected
411 int spl_start_uboot(void)
416 getenv_f("boot_os", s
, sizeof(s
));
417 if ((s
!= NULL
) && (*s
== '1' || *s
== 'y' || *s
== 'Y' ||
418 *s
== 't' || *s
== 'T'))
425 #if defined(CONFIG_HW_WATCHDOG)
426 static int watchdog_toggle
;
428 void hw_watchdog_reset(void)
433 * Check if watchdog is enabled via user command
435 if ((gd
->flags
& GD_FLG_RELOC
) && watchdog_toggle
) {
436 /* Set direction to output */
437 setbits_be32((void *)MPC5XXX_WU_GPIO_DIR
, CONFIG_WDOG_GPIO_PIN
);
440 * Toggle watchdog output
442 val
= (in_be32((void *)MPC5XXX_WU_GPIO_DATA_O
) &
443 CONFIG_WDOG_GPIO_PIN
);
445 clrbits_be32((void *)MPC5XXX_WU_GPIO_DATA_O
,
446 CONFIG_WDOG_GPIO_PIN
);
448 setbits_be32((void *)MPC5XXX_WU_GPIO_DATA_O
,
449 CONFIG_WDOG_GPIO_PIN
);
454 int do_wdog_toggle(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
459 if (strncmp(argv
[1], "on", 2) == 0)
461 else if (strncmp(argv
[1], "off", 3) == 0)
468 printf("Usage: wdogtoggle %s\n", cmdtp
->usage
);
473 wdogtoggle
, CONFIG_SYS_MAXARGS
, 2, do_wdog_toggle
,
474 "toggle GPIO pin to service watchdog",
475 "[on/off] - Switch watchdog toggling via GPIO pin on/off"