1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 *
4 * Common board functions for OMAP3 based boards.
5 *
6 * (C) Copyright 2004-2008
7 * Texas Instruments, <www.ti.com>
8 *
9 * Author :
10 * Sunil Kumar <sunilsaini05@gmail.com>
11 * Shashi Ranjan <shashiranjanmca05@gmail.com>
12 *
13 * Derived from Beagle Board and 3430 SDP code by
14 * Richard Woodruff <r-woodruff2@ti.com>
15 * Syed Mohammed Khasim <khasim@ti.com>
16 *
17 */
18 #include <common.h>
19 #include <dm.h>
20 #include <spl.h>
21 #include <asm/io.h>
22 #include <asm/arch/sys_proto.h>
23 #include <asm/arch/mem.h>
24 #include <asm/cache.h>
25 #include <asm/armv7.h>
26 #include <asm/gpio.h>
27 #include <asm/omap_common.h>
28 #include <linux/compiler.h>
29
30 /* Declarations */
31 extern omap3_sysinfo sysinfo;
32 #ifndef CONFIG_SYS_L2CACHE_OFF
33 static void omap3_invalidate_l2_cache_secure(void);
34 #endif
35
36 #ifdef CONFIG_DM_GPIO
37 #if !CONFIG_IS_ENABLED(OF_CONTROL)
38 /* Manually initialize GPIO banks when OF_CONTROL doesn't */
39 static const struct omap_gpio_platdata omap34xx_gpio[] = {
40 { 0, OMAP34XX_GPIO1_BASE },
41 { 1, OMAP34XX_GPIO2_BASE },
42 { 2, OMAP34XX_GPIO3_BASE },
43 { 3, OMAP34XX_GPIO4_BASE },
44 { 4, OMAP34XX_GPIO5_BASE },
45 { 5, OMAP34XX_GPIO6_BASE },
46 };
47
48 U_BOOT_DEVICES(omap34xx_gpios) = {
49 { "gpio_omap", &omap34xx_gpio[0] },
50 { "gpio_omap", &omap34xx_gpio[1] },
51 { "gpio_omap", &omap34xx_gpio[2] },
52 { "gpio_omap", &omap34xx_gpio[3] },
53 { "gpio_omap", &omap34xx_gpio[4] },
54 { "gpio_omap", &omap34xx_gpio[5] },
55 };
56 #endif
57 #else
58
59 static const struct gpio_bank gpio_bank_34xx[6] = {
60 { (void *)OMAP34XX_GPIO1_BASE },
61 { (void *)OMAP34XX_GPIO2_BASE },
62 { (void *)OMAP34XX_GPIO3_BASE },
63 { (void *)OMAP34XX_GPIO4_BASE },
64 { (void *)OMAP34XX_GPIO5_BASE },
65 { (void *)OMAP34XX_GPIO6_BASE },
66 };
67
68 const struct gpio_bank *const omap_gpio_bank = gpio_bank_34xx;
69
70 #endif
71
72 /******************************************************************************
73 * Routine: secure_unlock
74 * Description: Setup security registers for access
75 * (GP Device only)
76 *****************************************************************************/
secure_unlock_mem(void)77 void secure_unlock_mem(void)
78 {
79 struct pm *pm_rt_ape_base = (struct pm *)PM_RT_APE_BASE_ADDR_ARM;
80 struct pm *pm_gpmc_base = (struct pm *)PM_GPMC_BASE_ADDR_ARM;
81 struct pm *pm_ocm_ram_base = (struct pm *)PM_OCM_RAM_BASE_ADDR_ARM;
82 struct pm *pm_iva2_base = (struct pm *)PM_IVA2_BASE_ADDR_ARM;
83 struct sms *sms_base = (struct sms *)OMAP34XX_SMS_BASE;
84
85 /* Protection Module Register Target APE (PM_RT) */
86 writel(UNLOCK_1, &pm_rt_ape_base->req_info_permission_1);
87 writel(UNLOCK_1, &pm_rt_ape_base->read_permission_0);
88 writel(UNLOCK_1, &pm_rt_ape_base->wirte_permission_0);
89 writel(UNLOCK_2, &pm_rt_ape_base->addr_match_1);
90
91 writel(UNLOCK_3, &pm_gpmc_base->req_info_permission_0);
92 writel(UNLOCK_3, &pm_gpmc_base->read_permission_0);
93 writel(UNLOCK_3, &pm_gpmc_base->wirte_permission_0);
94
95 writel(UNLOCK_3, &pm_ocm_ram_base->req_info_permission_0);
96 writel(UNLOCK_3, &pm_ocm_ram_base->read_permission_0);
97 writel(UNLOCK_3, &pm_ocm_ram_base->wirte_permission_0);
98 writel(UNLOCK_2, &pm_ocm_ram_base->addr_match_2);
99
100 /* IVA Changes */
101 writel(UNLOCK_3, &pm_iva2_base->req_info_permission_0);
102 writel(UNLOCK_3, &pm_iva2_base->read_permission_0);
103 writel(UNLOCK_3, &pm_iva2_base->wirte_permission_0);
104
105 /* SDRC region 0 public */
106 writel(UNLOCK_1, &sms_base->rg_att0);
107 }
108
109 /******************************************************************************
110 * Routine: secureworld_exit()
111 * Description: If chip is EMU and boot type is external
112 * configure secure registers and exit secure world
113 * general use.
114 *****************************************************************************/
secureworld_exit(void)115 void secureworld_exit(void)
116 {
117 unsigned long i;
118
119 /* configure non-secure access control register */
120 __asm__ __volatile__("mrc p15, 0, %0, c1, c1, 2":"=r"(i));
121 /* enabling co-processor CP10 and CP11 accesses in NS world */
122 __asm__ __volatile__("orr %0, %0, #0xC00":"=r"(i));
123 /*
124 * allow allocation of locked TLBs and L2 lines in NS world
125 * allow use of PLE registers in NS world also
126 */
127 __asm__ __volatile__("orr %0, %0, #0x70000":"=r"(i));
128 __asm__ __volatile__("mcr p15, 0, %0, c1, c1, 2":"=r"(i));
129
130 /* Enable ASA in ACR register */
131 __asm__ __volatile__("mrc p15, 0, %0, c1, c0, 1":"=r"(i));
132 __asm__ __volatile__("orr %0, %0, #0x10":"=r"(i));
133 __asm__ __volatile__("mcr p15, 0, %0, c1, c0, 1":"=r"(i));
134
135 /* Exiting secure world */
136 __asm__ __volatile__("mrc p15, 0, %0, c1, c1, 0":"=r"(i));
137 __asm__ __volatile__("orr %0, %0, #0x31":"=r"(i));
138 __asm__ __volatile__("mcr p15, 0, %0, c1, c1, 0":"=r"(i));
139 }
140
141 /******************************************************************************
142 * Routine: try_unlock_sram()
143 * Description: If chip is GP/EMU(special) type, unlock the SRAM for
144 * general use.
145 *****************************************************************************/
try_unlock_memory(void)146 void try_unlock_memory(void)
147 {
148 int mode;
149 int in_sdram = is_running_in_sdram();
150
151 /*
152 * if GP device unlock device SRAM for general use
153 * secure code breaks for Secure/Emulation device - HS/E/T
154 */
155 mode = get_device_type();
156 if (mode == GP_DEVICE)
157 secure_unlock_mem();
158
159 /*
160 * If device is EMU and boot is XIP external booting
161 * Unlock firewalls and disable L2 and put chip
162 * out of secure world
163 *
164 * Assuming memories are unlocked by the demon who put us in SDRAM
165 */
166 if ((mode <= EMU_DEVICE) && (get_boot_type() == 0x1F)
167 && (!in_sdram)) {
168 secure_unlock_mem();
169 secureworld_exit();
170 }
171
172 return;
173 }
174
early_system_init(void)175 void early_system_init(void)
176 {
177 hw_data_init();
178 }
179
180 /******************************************************************************
181 * Routine: s_init
182 * Description: Does early system init of muxing and clocks.
183 * - Called path is with SRAM stack.
184 *****************************************************************************/
s_init(void)185 void s_init(void)
186 {
187 watchdog_init();
188 early_system_init();
189
190 try_unlock_memory();
191
192 #ifndef CONFIG_SYS_L2CACHE_OFF
193 /* Invalidate L2-cache from secure mode */
194 omap3_invalidate_l2_cache_secure();
195 #endif
196
197 set_muxconf_regs();
198 sdelay(100);
199
200 prcm_init();
201
202 per_clocks_enable();
203
204 #ifdef CONFIG_USB_EHCI_OMAP
205 ehci_clocks_enable();
206 #endif
207 }
208
209 #ifdef CONFIG_SPL_BUILD
board_init_f(ulong dummy)210 void board_init_f(ulong dummy)
211 {
212 early_system_init();
213 mem_init();
214 /*
215 * Save the boot parameters passed from romcode.
216 * We cannot delay the saving further than this,
217 * to prevent overwrites.
218 */
219 save_omap_boot_params();
220 }
221 #endif
222
223 /*
224 * Routine: misc_init_r
225 * Description: A basic misc_init_r that just displays the die ID
226 */
misc_init_r(void)227 int __weak misc_init_r(void)
228 {
229 omap_die_id_display();
230
231 return 0;
232 }
233
234 /******************************************************************************
235 * Routine: wait_for_command_complete
236 * Description: Wait for posting to finish on watchdog
237 *****************************************************************************/
wait_for_command_complete(struct watchdog * wd_base)238 static void wait_for_command_complete(struct watchdog *wd_base)
239 {
240 int pending = 1;
241 do {
242 pending = readl(&wd_base->wwps);
243 } while (pending);
244 }
245
246 /******************************************************************************
247 * Routine: watchdog_init
248 * Description: Shut down watch dogs
249 *****************************************************************************/
watchdog_init(void)250 void watchdog_init(void)
251 {
252 struct watchdog *wd2_base = (struct watchdog *)WD2_BASE;
253 struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
254
255 /*
256 * There are 3 watch dogs WD1=Secure, WD2=MPU, WD3=IVA. WD1 is
257 * either taken care of by ROM (HS/EMU) or not accessible (GP).
258 * We need to take care of WD2-MPU or take a PRCM reset. WD3
259 * should not be running and does not generate a PRCM reset.
260 */
261
262 setbits_le32(&prcm_base->fclken_wkup, 0x20);
263 setbits_le32(&prcm_base->iclken_wkup, 0x20);
264 wait_on_value(ST_WDT2, 0x20, &prcm_base->idlest_wkup, 5);
265
266 writel(WD_UNLOCK1, &wd2_base->wspr);
267 wait_for_command_complete(wd2_base);
268 writel(WD_UNLOCK2, &wd2_base->wspr);
269 }
270
271 /******************************************************************************
272 * Dummy function to handle errors for EABI incompatibility
273 *****************************************************************************/
abort(void)274 void abort(void)
275 {
276 }
277
278 #if defined(CONFIG_NAND_OMAP_GPMC) & !defined(CONFIG_SPL_BUILD)
279 /******************************************************************************
280 * OMAP3 specific command to switch between NAND HW and SW ecc
281 *****************************************************************************/
do_switch_ecc(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])282 static int do_switch_ecc(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
283 {
284 int hw, strength = 1;
285
286 if (argc < 2 || argc > 3)
287 goto usage;
288
289 if (strncmp(argv[1], "hw", 2) == 0) {
290 hw = 1;
291 if (argc == 3) {
292 if (strncmp(argv[2], "bch8", 4) == 0)
293 strength = 8;
294 else if (strncmp(argv[2], "bch16", 5) == 0)
295 strength = 16;
296 else if (strncmp(argv[2], "hamming", 7) != 0)
297 goto usage;
298 }
299 } else if (strncmp(argv[1], "sw", 2) == 0) {
300 hw = 0;
301 if (argc == 3) {
302 if (strncmp(argv[2], "bch8", 4) == 0)
303 strength = 8;
304 else if (strncmp(argv[2], "hamming", 7) != 0)
305 goto usage;
306 }
307 } else {
308 goto usage;
309 }
310
311 return -omap_nand_switch_ecc(hw, strength);
312
313 usage:
314 printf ("Usage: nandecc %s\n", cmdtp->usage);
315 return 1;
316 }
317
318 U_BOOT_CMD(
319 nandecc, 3, 1, do_switch_ecc,
320 "switch OMAP3 NAND ECC calculation algorithm",
321 "hw [hamming|bch8|bch16] - Switch between NAND hardware 1-bit hamming"
322 " and 8-bit/16-bit BCH\n"
323 " ecc calculation (second parameter may"
324 " be omitted).\n"
325 "nandecc sw - Switch to NAND software ecc algorithm."
326 );
327
328 #endif /* CONFIG_NAND_OMAP_GPMC & !CONFIG_SPL_BUILD */
329
330 #ifdef CONFIG_DISPLAY_BOARDINFO
331 /**
332 * Print board information
333 */
checkboard(void)334 int checkboard (void)
335 {
336 char *mem_s ;
337
338 if (is_mem_sdr())
339 mem_s = "mSDR";
340 else
341 mem_s = "LPDDR";
342
343 printf("%s + %s/%s\n", sysinfo.board_string, mem_s,
344 sysinfo.nand_string);
345
346 return 0;
347 }
348 #endif /* CONFIG_DISPLAY_BOARDINFO */
349
omap3_emu_romcode_call(u32 service_id,u32 * parameters)350 static void omap3_emu_romcode_call(u32 service_id, u32 *parameters)
351 {
352 u32 i, num_params = *parameters;
353 u32 *sram_scratch_space = (u32 *)OMAP3_PUBLIC_SRAM_SCRATCH_AREA;
354
355 /*
356 * copy the parameters to an un-cached area to avoid coherency
357 * issues
358 */
359 for (i = 0; i < num_params; i++) {
360 __raw_writel(*parameters, sram_scratch_space);
361 parameters++;
362 sram_scratch_space++;
363 }
364
365 /* Now make the PPA call */
366 do_omap3_emu_romcode_call(service_id, OMAP3_PUBLIC_SRAM_SCRATCH_AREA);
367 }
368
omap3_set_aux_cr_secure(u32 acr)369 void __weak omap3_set_aux_cr_secure(u32 acr)
370 {
371 struct emu_hal_params emu_romcode_params;
372
373 emu_romcode_params.num_params = 1;
374 emu_romcode_params.param1 = acr;
375 omap3_emu_romcode_call(OMAP3_EMU_HAL_API_WRITE_ACR,
376 (u32 *)&emu_romcode_params);
377 }
378
v7_arch_cp15_set_l2aux_ctrl(u32 l2auxctrl,u32 cpu_midr,u32 cpu_rev_comb,u32 cpu_variant,u32 cpu_rev)379 void v7_arch_cp15_set_l2aux_ctrl(u32 l2auxctrl, u32 cpu_midr,
380 u32 cpu_rev_comb, u32 cpu_variant,
381 u32 cpu_rev)
382 {
383 if (get_device_type() == GP_DEVICE)
384 omap_smc1(OMAP3_GP_ROMCODE_API_WRITE_L2ACR, l2auxctrl);
385
386 /* L2 Cache Auxiliary Control Register is not banked */
387 }
388
v7_arch_cp15_set_acr(u32 acr,u32 cpu_midr,u32 cpu_rev_comb,u32 cpu_variant,u32 cpu_rev)389 void v7_arch_cp15_set_acr(u32 acr, u32 cpu_midr, u32 cpu_rev_comb,
390 u32 cpu_variant, u32 cpu_rev)
391 {
392 /* Write ACR - affects secure banked bits */
393 if (get_device_type() == GP_DEVICE)
394 omap_smc1(OMAP3_GP_ROMCODE_API_WRITE_ACR, acr);
395 else
396 omap3_set_aux_cr_secure(acr);
397
398 /* Write ACR - affects non-secure banked bits - some erratas need it */
399 asm volatile ("mcr p15, 0, %0, c1, c0, 1" : : "r" (acr));
400 }
401
402
403 #ifndef CONFIG_SYS_L2CACHE_OFF
omap3_update_aux_cr(u32 set_bits,u32 clear_bits)404 static void omap3_update_aux_cr(u32 set_bits, u32 clear_bits)
405 {
406 u32 acr;
407
408 /* Read ACR */
409 asm volatile ("mrc p15, 0, %0, c1, c0, 1" : "=r" (acr));
410 acr &= ~clear_bits;
411 acr |= set_bits;
412 v7_arch_cp15_set_acr(acr, 0, 0, 0, 0);
413
414 }
415
416 /* Invalidate the entire L2 cache from secure mode */
omap3_invalidate_l2_cache_secure(void)417 static void omap3_invalidate_l2_cache_secure(void)
418 {
419 if (get_device_type() == GP_DEVICE) {
420 omap_smc1(OMAP3_GP_ROMCODE_API_L2_INVAL, 0);
421 } else {
422 struct emu_hal_params emu_romcode_params;
423 emu_romcode_params.num_params = 1;
424 emu_romcode_params.param1 = 0;
425 omap3_emu_romcode_call(OMAP3_EMU_HAL_API_L2_INVAL,
426 (u32 *)&emu_romcode_params);
427 }
428 }
429
v7_outer_cache_enable(void)430 void v7_outer_cache_enable(void)
431 {
432
433 /*
434 * Set L2EN
435 * On some revisions L2EN bit is banked on some revisions it's not
436 * No harm in setting both banked bits(in fact this is required
437 * by an erratum)
438 */
439 omap3_update_aux_cr(0x2, 0);
440 }
441
omap3_outer_cache_disable(void)442 void omap3_outer_cache_disable(void)
443 {
444 /*
445 * Clear L2EN
446 * On some revisions L2EN bit is banked on some revisions it's not
447 * No harm in clearing both banked bits(in fact this is required
448 * by an erratum)
449 */
450 omap3_update_aux_cr(0, 0x2);
451 }
452 #endif /* !CONFIG_SYS_L2CACHE_OFF */
453