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.
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 gd->ram_size = dramsize + dramsize2;
161 static void get_revisions(int *failsavelevel, int *digiboardversion,
164 struct mpc5xxx_gpt_0_7 *gpt = (struct mpc5xxx_gpt_0_7 *)MPC5XXX_GPT;
167 /* read digitalboard-version from TMR[2..4] */
169 val |= (gpt->gpt2.sr & (1 << (31 - 23))) ? (1) : 0;
170 val |= (gpt->gpt3.sr & (1 << (31 - 23))) ? (1 << 1) : 0;
171 val |= (gpt->gpt4.sr & (1 << (31 - 23))) ? (1 << 2) : 0;
172 *digiboardversion = val;
175 * A4M2K only supports digiboardversion. No failsavelevel and
178 #if !defined(CONFIG_A4M2K)
180 * Figure out failsavelevel
183 *failsavelevel = 0; /* 0=failsave, 1=board ok, 2=fpga ok */
185 if (*digiboardversion == 0) {
186 *failsavelevel = 1; /* digiboard-version ok */
188 /* read fpga-version from TMR[5..7] */
190 val |= (gpt->gpt5.sr & (1 << (31 - 23))) ? (1) : 0;
191 val |= (gpt->gpt6.sr & (1 << (31 - 23))) ? (1 << 1) : 0;
192 val |= (gpt->gpt7.sr & (1 << (31 - 23))) ? (1 << 2) : 0;
195 if (*fpgaversion == 1)
196 *failsavelevel = 2; /* fpga-version ok */
202 * This function is called from the SPL U-Boot version for
203 * early init stuff, that needs to be done for OS (e.g. Linux)
204 * booting. Doing it later in the real U-Boot would not work
205 * in case that the SPL U-Boot boots Linux directly.
207 void spl_board_init(void)
209 struct mpc5xxx_gpio *gpio = (struct mpc5xxx_gpio *)MPC5XXX_GPIO;
210 struct mpc5xxx_mmap_ctl *mm =
211 (struct mpc5xxx_mmap_ctl *)CONFIG_SYS_MBAR;
213 #if defined(CONFIG_A4M2K)
214 /* enable CS3 and CS5 (FPGA) */
215 setbits_be32(&mm->ipbi_ws_ctrl, (1 << 19) | (1 << 21));
217 int digiboardversion;
222 get_revisions(&failsavelevel, &digiboardversion, &fpgaversion);
224 val = in_be32(&mm->ipbi_ws_ctrl);
226 /* first clear bits 19..21 (CS3...5) */
227 val &= ~((1 << 19) | (1 << 20) | (1 << 21));
228 if (failsavelevel == 2) {
230 val |= (1 << 19) | (1 << 21);
233 if (failsavelevel >= 1) {
234 /* at least digiboard-version ok */
238 /* And write new value back to register */
239 out_be32(&mm->ipbi_ws_ctrl, val);
242 /* Setup pin multiplexing */
243 if (failsavelevel == 2) {
244 /* fpga-version ok */
245 #if defined(CONFIG_SYS_GPS_PORT_CONFIG_2)
246 out_be32(&gpio->port_config, CONFIG_SYS_GPS_PORT_CONFIG_2);
248 } else if (failsavelevel == 1) {
249 /* digiboard-version ok - fpga not */
250 #if defined(CONFIG_SYS_GPS_PORT_CONFIG_1)
251 out_be32(&gpio->port_config, CONFIG_SYS_GPS_PORT_CONFIG_1);
254 /* full failsave-mode */
255 #if defined(CONFIG_SYS_GPS_PORT_CONFIG)
256 out_be32(&gpio->port_config, CONFIG_SYS_GPS_PORT_CONFIG);
262 * Setup gpio_wkup_7 as watchdog AS INPUT to disable it - see
265 * MPC5XXX_WU_GPIO_DIR direction is already 0 (INPUT)
266 * set bit 0(msb) to 1
268 setbits_be32((void *)MPC5XXX_WU_GPIO_ENABLE, CONFIG_WDOG_GPIO_PIN);
270 #if defined(CONFIG_A4M2K)
271 /* Setup USB[x] as MPCDiag[0..3] GPIO outputs */
273 /* set USB0,6,7,8 (MPCDiag[0..3]) direction to output */
274 gpio->simple_ddr |= 1 << (31 - 15);
275 gpio->simple_ddr |= 1 << (31 - 14);
276 gpio->simple_ddr |= 1 << (31 - 13);
277 gpio->simple_ddr |= 1 << (31 - 12);
279 /* enable USB0,6,7,8 (MPCDiag[0..3]) as GPIO */
280 gpio->simple_gpioe |= 1 << (31 - 15);
281 gpio->simple_gpioe |= 1 << (31 - 14);
282 gpio->simple_gpioe |= 1 << (31 - 13);
283 gpio->simple_gpioe |= 1 << (31 - 12);
285 /* Setup PSC2[0..2] as STSLED[0..2] GPIO outputs */
287 /* set PSC2[0..2] (STSLED[0..2]) direction to output */
288 gpio->simple_ddr |= 1 << (31 - 27);
289 gpio->simple_ddr |= 1 << (31 - 26);
290 gpio->simple_ddr |= 1 << (31 - 25);
292 /* enable PSC2[0..2] (STSLED[0..2]) as GPIO */
293 gpio->simple_gpioe |= 1 << (31 - 27);
294 gpio->simple_gpioe |= 1 << (31 - 26);
295 gpio->simple_gpioe |= 1 << (31 - 25);
297 /* Setup PSC6[2] as MRST2 self reset GPIO output */
299 /* set PSC6[2]/IRDA_TX (MRST2) direction to output */
300 gpio->simple_ddr |= 1 << (31 - 3);
302 /* set PSC6[2]/IRDA_TX (MRST2) output as open drain */
303 gpio->simple_ode |= 1 << (31 - 3);
305 /* set PSC6[2]/IRDA_TX (MRST2) output as default high */
306 gpio->simple_dvo |= 1 << (31 - 3);
308 /* enable PSC6[2]/IRDA_TX (MRST2) as GPIO */
309 gpio->simple_gpioe |= 1 << (31 - 3);
311 /* Setup PSC6[3] as HARNSSCD harness code GPIO input */
313 /* set PSC6[3]/IR_USB_CLK (HARNSSCD) direction to input */
314 gpio->simple_ddr |= 0 << (31 - 2);
316 /* enable PSC6[3]/IR_USB_CLK (HARNSSCD) as GPIO */
317 gpio->simple_gpioe |= 1 << (31 - 2);
319 /* setup GPIOs for status-leds if needed - see ticket #57 */
320 if (failsavelevel > 0) {
321 /* digiboard-version is OK */
322 /* LED is LOW ACTIVE - so deactivate by set output to 1 */
323 gpio->simple_dvo |= 1 << (31 - 12);
324 gpio->simple_dvo |= 1 << (31 - 13);
325 /* set GPIO direction to output */
326 gpio->simple_ddr |= 1 << (31 - 12);
327 gpio->simple_ddr |= 1 << (31 - 13);
328 /* open drain config is set to "normal output" at reset */
329 /* gpio->simple_ode &=~ ( 1 << (31-12) ); */
330 /* gpio->simple_ode &=~ ( 1 << (31-13) ); */
332 gpio->simple_gpioe |= 1 << (31 - 12);
333 gpio->simple_gpioe |= 1 << (31 - 13);
336 /* setup fpga irq - see ticket #65 */
337 if (failsavelevel > 1) {
339 * The main irq initialisation is done in interrupts.c
342 struct mpc5xxx_intr *intr =
343 (struct mpc5xxx_intr *)(MPC5XXX_ICTL);
345 setbits_be32(&intr->ctrl, 0x08C01801);
348 * The MBAR+0x0524 Bit 21:23 CSe are ignored here due to the
349 * already cleared (intr_ctrl) MBAR+0x0510 ECLR[0] bit above
357 int digiboardversion;
361 get_revisions(&failsavelevel, &digiboardversion, &fpgaversion);
364 puts("Board: A4M2K\n");
365 printf(" digiboard IO version %u\n", digiboardversion);
367 puts("Board: A3M071\n");
368 printf("Rev: failsave level %u\n", failsavelevel);
369 printf(" digiboard IO version %u\n", digiboardversion);
370 if (failsavelevel > 0) /* only if fpga-version red */
371 printf(" fpga IO version %u\n", fpgaversion);
377 /* miscellaneous platform dependent initialisations */
378 int misc_init_r(void)
380 /* adjust flash start and offset to detected values */
381 gd->bd->bi_flashstart = flash_info[0].start[0];
382 gd->bd->bi_flashoffset = 0;
385 out_be32((void *)MPC5XXX_BOOTCS_START,
386 START_REG(gd->bd->bi_flashstart));
387 out_be32((void *)MPC5XXX_CS0_START, START_REG(gd->bd->bi_flashstart));
388 out_be32((void *)MPC5XXX_BOOTCS_STOP,
389 STOP_REG(gd->bd->bi_flashstart, gd->bd->bi_flashsize));
390 out_be32((void *)MPC5XXX_CS0_STOP,
391 STOP_REG(gd->bd->bi_flashstart, gd->bd->bi_flashsize));
396 #ifdef CONFIG_OF_BOARD_SETUP
397 int ft_board_setup(void *blob, bd_t *bd)
399 ft_cpu_setup(blob, bd);
403 #endif /* CONFIG_OF_BOARD_SETUP */
405 #ifdef CONFIG_SPL_OS_BOOT
407 * A3M071 specific implementation of spl_start_uboot()
410 * 0 if booting into OS is selected (default)
411 * 1 if booting into U-Boot is selected
413 int spl_start_uboot(void)
418 getenv_f("boot_os", s, sizeof(s));
419 if ((s != NULL) && (*s == '1' || *s == 'y' || *s == 'Y' ||
420 *s == 't' || *s == 'T'))
427 #if defined(CONFIG_HW_WATCHDOG)
428 static int watchdog_toggle;
430 void hw_watchdog_reset(void)
435 * Check if watchdog is enabled via user command
437 if ((gd->flags & GD_FLG_RELOC) && watchdog_toggle) {
438 /* Set direction to output */
439 setbits_be32((void *)MPC5XXX_WU_GPIO_DIR, CONFIG_WDOG_GPIO_PIN);
442 * Toggle watchdog output
444 val = (in_be32((void *)MPC5XXX_WU_GPIO_DATA_O) &
445 CONFIG_WDOG_GPIO_PIN);
447 clrbits_be32((void *)MPC5XXX_WU_GPIO_DATA_O,
448 CONFIG_WDOG_GPIO_PIN);
450 setbits_be32((void *)MPC5XXX_WU_GPIO_DATA_O,
451 CONFIG_WDOG_GPIO_PIN);
456 int do_wdog_toggle(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
461 if (strncmp(argv[1], "on", 2) == 0)
463 else if (strncmp(argv[1], "off", 3) == 0)
470 printf("Usage: wdogtoggle %s\n", cmdtp->usage);
475 wdogtoggle, CONFIG_SYS_MAXARGS, 2, do_wdog_toggle,
476 "toggle GPIO pin to service watchdog",
477 "[on/off] - Switch watchdog toggling via GPIO pin on/off"