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arm: mach-k3: am642: Fix reset for workaround errata ID i2331
[thirdparty/u-boot.git] / arch / arm / mach-k3 / am642_init.c
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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * AM642: SoC specific initialization
4 *
5 * Copyright (C) 2020-2021 Texas Instruments Incorporated - https://www.ti.com/
6 * Keerthy <j-keerthy@ti.com>
7 * Dave Gerlach <d-gerlach@ti.com>
8 */
9
669a03e0 10#include <fdt_support.h>
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11#include <spl.h>
12#include <asm/io.h>
57dba04a 13#include <asm/arch/hardware.h>
f5e49446 14#include "sysfw-loader.h"
eb54168b 15#include "common.h"
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16#include <linux/soc/ti/ti_sci_protocol.h>
17#include <dm.h>
18#include <dm/uclass-internal.h>
19#include <dm/pinctrl.h>
f4686c3d 20#include <mmc.h>
b5425a96 21#include <dm/root.h>
4d03f476 22#include <command.h>
eb54168b 23
92e46092 24#define CTRLMMR_MCU_RST_CTRL 0x04518170
eb54168b 25
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26#define CTRLMMR_MCU_RST_SRC (MCU_CTRL_MMR0_BASE + 0x18178)
27#define COLD_BOOT 0
28#define SW_POR_MCU BIT(24)
29#define SW_POR_MAIN BIT(25)
30
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31static void ctrl_mmr_unlock(void)
32{
33 /* Unlock all PADCFG_MMR1 module registers */
34 mmr_unlock(PADCFG_MMR1_BASE, 1);
35
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36 /* Unlock all MCU_CTRL_MMR0 module registers */
37 mmr_unlock(MCU_CTRL_MMR0_BASE, 0);
38 mmr_unlock(MCU_CTRL_MMR0_BASE, 1);
39 mmr_unlock(MCU_CTRL_MMR0_BASE, 2);
40 mmr_unlock(MCU_CTRL_MMR0_BASE, 3);
41 mmr_unlock(MCU_CTRL_MMR0_BASE, 4);
42 mmr_unlock(MCU_CTRL_MMR0_BASE, 6);
43
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44 /* Unlock all CTRL_MMR0 module registers */
45 mmr_unlock(CTRL_MMR0_BASE, 0);
46 mmr_unlock(CTRL_MMR0_BASE, 1);
47 mmr_unlock(CTRL_MMR0_BASE, 2);
48 mmr_unlock(CTRL_MMR0_BASE, 3);
49 mmr_unlock(CTRL_MMR0_BASE, 5);
50 mmr_unlock(CTRL_MMR0_BASE, 6);
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51
52 /* Unlock all MCU_PADCFG_MMR1 module registers */
53 mmr_unlock(MCU_PADCFG_MMR1_BASE, 1);
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54}
55
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56/*
57 * This uninitialized global variable would normal end up in the .bss section,
58 * but the .bss is cleared between writing and reading this variable, so move
59 * it to the .data section.
60 */
61u32 bootindex __section(".data");
236f2ec4 62static struct rom_extended_boot_data bootdata __section(".data");
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63
64static void store_boot_info_from_rom(void)
65{
66 bootindex = *(u32 *)(CONFIG_SYS_K3_BOOT_PARAM_TABLE_INDEX);
4c710fa8 67 memcpy(&bootdata, (uintptr_t *)ROM_EXTENDED_BOOT_DATA_INFO,
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68 sizeof(struct rom_extended_boot_data));
69}
70
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71#if defined(CONFIG_K3_LOAD_SYSFW) && CONFIG_IS_ENABLED(DM_MMC)
72void k3_mmc_stop_clock(void)
73{
74 if (spl_boot_device() == BOOT_DEVICE_MMC1) {
75 struct mmc *mmc = find_mmc_device(0);
76
77 if (!mmc)
78 return;
79
80 mmc->saved_clock = mmc->clock;
81 mmc_set_clock(mmc, 0, true);
82 }
83}
84
85void k3_mmc_restart_clock(void)
86{
87 if (spl_boot_device() == BOOT_DEVICE_MMC1) {
88 struct mmc *mmc = find_mmc_device(0);
89
90 if (!mmc)
91 return;
92
93 mmc_set_clock(mmc, mmc->saved_clock, false);
94 }
95}
96#else
97void k3_mmc_stop_clock(void) {}
98void k3_mmc_restart_clock(void) {}
99#endif
100
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101#ifdef CONFIG_SPL_OF_LIST
102void do_dt_magic(void)
103{
104 int ret, rescan;
105
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106 /* Perform board detection */
107 do_board_detect();
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108
109 /*
110 * Board detection has been done.
111 * Let us see if another dtb wouldn't be a better match
112 * for our board
113 */
114 if (IS_ENABLED(CONFIG_CPU_V7R)) {
115 ret = fdtdec_resetup(&rescan);
116 if (!ret && rescan) {
117 dm_uninit();
118 dm_init_and_scan(true);
119 }
120 }
121}
122#endif
123
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124#if CONFIG_IS_ENABLED(USB_STORAGE)
125static int fixup_usb_boot(const void *fdt_blob)
126{
127 int ret = 0;
128
129 switch (spl_boot_device()) {
130 case BOOT_DEVICE_USB:
131 /*
132 * If the boot mode is host, fixup the dr_mode to host
133 * before cdns3 bind takes place
134 */
135 ret = fdt_find_and_setprop((void *)fdt_blob,
136 "/bus@f4000/cdns-usb@f900000/usb@f400000",
137 "dr_mode", "host", 5, 0);
138 if (ret)
139 printf("%s: fdt_find_and_setprop() failed:%d\n",
140 __func__, ret);
141 fallthrough;
142 default:
143 break;
144 }
145
146 return ret;
147}
148
149int fdtdec_board_setup(const void *fdt_blob)
150{
151 /* Can use the pointer from the function parameters */
152 return fixup_usb_boot(fdt_blob);
153}
154#endif
155
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156#if defined(CONFIG_ESM_K3)
157static void enable_mcu_esm_reset(void)
158{
159 /* Set CTRLMMR_MCU_RST_CTRL:MCU_ESM_ERROR_RST_EN_Z to '0' (low active) */
160 u32 stat = readl(CTRLMMR_MCU_RST_CTRL);
161
162 stat &= 0xFFFDFFFF;
163 writel(stat, CTRLMMR_MCU_RST_CTRL);
164}
165#endif
166
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167void board_init_f(ulong dummy)
168{
92e46092 169#if defined(CONFIG_K3_LOAD_SYSFW) || defined(CONFIG_K3_AM64_DDRSS) || defined(CONFIG_ESM_K3)
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170 struct udevice *dev;
171 int ret;
4d03f476 172 int rst_src;
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173#endif
174
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175#if defined(CONFIG_CPU_V7R)
176 setup_k3_mpu_regions();
177#endif
178
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179 /*
180 * Cannot delay this further as there is a chance that
181 * K3_BOOT_PARAM_TABLE_INDEX can be over written by SPL MALLOC section.
182 */
183 store_boot_info_from_rom();
184
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185 ctrl_mmr_unlock();
186
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187 /* Init DM early */
188 spl_early_init();
189
190 preloader_console_init();
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191
192#if defined(CONFIG_K3_LOAD_SYSFW)
193 /*
194 * Process pinctrl for serial3 a.k.a. MAIN UART1 module and continue
195 * regardless of the result of pinctrl. Do this without probing the
196 * device, but instead by searching the device that would request the
197 * given sequence number if probed. The UART will be used by the system
198 * firmware (SYSFW) image for various purposes and SYSFW depends on us
199 * to initialize its pin settings.
200 */
201 ret = uclass_find_device_by_seq(UCLASS_SERIAL, 3, &dev);
202 if (!ret)
203 pinctrl_select_state(dev, "default");
204
205 /*
206 * Load, start up, and configure system controller firmware.
207 * This will determine whether or not ROM has already loaded
208 * system firmware and if so, will only perform needed config
209 * and not attempt to load firmware again.
210 */
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211 k3_sysfw_loader(is_rom_loaded_sysfw(&bootdata), k3_mmc_stop_clock,
212 k3_mmc_restart_clock);
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213#endif
214
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215#if defined(CONFIG_CPU_V7R)
216 /*
217 * Errata ID i2331 CPSW: A device lockup can occur during the second
218 * read of any CPSW subsystem register after any MAIN domain power on
219 * reset (POR). A MAIN domain POR occurs using the hardware MCU_PORz
220 * signal, or via software using CTRLMMR_RST_CTRL.SW_MAIN_POR or
221 * CTRLMMR_MCU_RST_CTRL.SW_MAIN_POR. After these resets, the processor
222 * and internal bus structures may get into a state which is only
223 * recoverable with full device reset using MCU_PORz.
224 * Workaround(s): To avoid the lockup, a warm reset should be issued
225 * after a MAIN domain POR and before any access to the CPSW registers.
226 * The warm reset realigns internal clocks and prevents the lockup from
227 * happening.
228 */
4b370660 229 ret = uclass_get_device_by_driver(UCLASS_FIRMWARE, DM_DRIVER_GET(ti_sci), &dev);
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230 if (ret)
231 printf("\n%s:uclass device error [%d]\n",__func__,ret);
232
233 rst_src = readl(CTRLMMR_MCU_RST_SRC);
234 if (rst_src == COLD_BOOT || rst_src & (SW_POR_MCU | SW_POR_MAIN)) {
235 printf("Resetting on cold boot to workaround ErrataID:i2331\n");
236 printf("Please resend tiboot3.bin in case of UART/DFU boot\n");
237 do_reset(NULL, 0, 0, NULL);
238 }
239#endif
240
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241 /* Output System Firmware version info */
242 k3_sysfw_print_ver();
d411f097 243
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244 do_dt_magic();
245
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246#if defined(CONFIG_ESM_K3)
247 /* Probe/configure ESM0 */
248 ret = uclass_get_device_by_name(UCLASS_MISC, "esm@420000", &dev);
249 if (ret)
250 printf("esm main init failed: %d\n", ret);
251
252 /* Probe/configure MCUESM */
253 ret = uclass_get_device_by_name(UCLASS_MISC, "esm@4100000", &dev);
254 if (ret)
255 printf("esm mcu init failed: %d\n", ret);
256
257 enable_mcu_esm_reset();
258#endif
259
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260#if defined(CONFIG_K3_AM64_DDRSS)
261 ret = uclass_get_device(UCLASS_RAM, 0, &dev);
262 if (ret)
263 panic("DRAM init failed: %d\n", ret);
264#endif
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265 if (IS_ENABLED(CONFIG_SPL_ETH) && IS_ENABLED(CONFIG_TI_AM65_CPSW_NUSS) &&
266 spl_boot_device() == BOOT_DEVICE_ETHERNET) {
267 struct udevice *cpswdev;
268
269 if (uclass_get_device_by_driver(UCLASS_MISC, DM_DRIVER_GET(am65_cpsw_nuss), &cpswdev))
270 printf("Failed to probe am65_cpsw_nuss driver\n");
271 }
eb54168b 272}
57dba04a 273
59073573 274u32 spl_mmc_boot_mode(struct mmc *mmc, const u32 boot_device)
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275{
276 switch (boot_device) {
277 case BOOT_DEVICE_MMC1:
278 return MMCSD_MODE_EMMCBOOT;
279
280 case BOOT_DEVICE_MMC2:
281 return MMCSD_MODE_FS;
282
283 default:
284 return MMCSD_MODE_RAW;
285 }
286}
287
288static u32 __get_backup_bootmedia(u32 main_devstat)
289{
290 u32 bkup_bootmode =
291 (main_devstat & MAIN_DEVSTAT_BACKUP_BOOTMODE_MASK) >>
292 MAIN_DEVSTAT_BACKUP_BOOTMODE_SHIFT;
293 u32 bkup_bootmode_cfg =
294 (main_devstat & MAIN_DEVSTAT_BACKUP_BOOTMODE_CFG_MASK) >>
295 MAIN_DEVSTAT_BACKUP_BOOTMODE_CFG_SHIFT;
296
297 switch (bkup_bootmode) {
298 case BACKUP_BOOT_DEVICE_UART:
299 return BOOT_DEVICE_UART;
300
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301 case BACKUP_BOOT_DEVICE_DFU:
302 if (bkup_bootmode_cfg & MAIN_DEVSTAT_BACKUP_USB_MODE_MASK)
303 return BOOT_DEVICE_USB;
304 return BOOT_DEVICE_DFU;
305
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306
307 case BACKUP_BOOT_DEVICE_ETHERNET:
308 return BOOT_DEVICE_ETHERNET;
309
310 case BACKUP_BOOT_DEVICE_MMC:
311 if (bkup_bootmode_cfg)
312 return BOOT_DEVICE_MMC2;
313 return BOOT_DEVICE_MMC1;
314
315 case BACKUP_BOOT_DEVICE_SPI:
316 return BOOT_DEVICE_SPI;
317
318 case BACKUP_BOOT_DEVICE_I2C:
319 return BOOT_DEVICE_I2C;
320 };
321
322 return BOOT_DEVICE_RAM;
323}
324
325static u32 __get_primary_bootmedia(u32 main_devstat)
326{
327 u32 bootmode = (main_devstat & MAIN_DEVSTAT_PRIMARY_BOOTMODE_MASK) >>
328 MAIN_DEVSTAT_PRIMARY_BOOTMODE_SHIFT;
329 u32 bootmode_cfg =
330 (main_devstat & MAIN_DEVSTAT_PRIMARY_BOOTMODE_CFG_MASK) >>
331 MAIN_DEVSTAT_PRIMARY_BOOTMODE_CFG_SHIFT;
332
333 switch (bootmode) {
334 case BOOT_DEVICE_OSPI:
335 fallthrough;
336 case BOOT_DEVICE_QSPI:
337 fallthrough;
338 case BOOT_DEVICE_XSPI:
339 fallthrough;
340 case BOOT_DEVICE_SPI:
341 return BOOT_DEVICE_SPI;
342
343 case BOOT_DEVICE_ETHERNET_RGMII:
344 fallthrough;
345 case BOOT_DEVICE_ETHERNET_RMII:
346 return BOOT_DEVICE_ETHERNET;
347
348 case BOOT_DEVICE_EMMC:
349 return BOOT_DEVICE_MMC1;
350
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351 case BOOT_DEVICE_NAND:
352 return BOOT_DEVICE_NAND;
353
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354 case BOOT_DEVICE_MMC:
355 if ((bootmode_cfg & MAIN_DEVSTAT_PRIMARY_MMC_PORT_MASK) >>
356 MAIN_DEVSTAT_PRIMARY_MMC_PORT_SHIFT)
357 return BOOT_DEVICE_MMC2;
358 return BOOT_DEVICE_MMC1;
359
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360 case BOOT_DEVICE_DFU:
361 if ((bootmode_cfg & MAIN_DEVSTAT_PRIMARY_USB_MODE_MASK) >>
362 MAIN_DEVSTAT_PRIMARY_USB_MODE_SHIFT)
363 return BOOT_DEVICE_USB;
364 return BOOT_DEVICE_DFU;
365
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366 case BOOT_DEVICE_NOBOOT:
367 return BOOT_DEVICE_RAM;
368 }
369
370 return bootmode;
371}
372
373u32 spl_boot_device(void)
374{
375 u32 devstat = readl(CTRLMMR_MAIN_DEVSTAT);
376
377 if (bootindex == K3_PRIMARY_BOOTMODE)
378 return __get_primary_bootmedia(devstat);
379 else
380 return __get_backup_bootmedia(devstat);
381}