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1 /*
2  * (C) Copyright 2016 Rockchip Electronics Co., Ltd
3  *
4  * SPDX-License-Identifier:     GPL-2.0+
5  */
6
7 #include <common.h>
8 #include <debug_uart.h>
9 #include <dm.h>
10 #include <fdtdec.h>
11 #include <led.h>
12 #include <malloc.h>
13 #include <mmc.h>
14 #include <ram.h>
15 #include <spl.h>
16 #include <asm/gpio.h>
17 #include <asm/io.h>
18 #include <asm/arch/clock.h>
19 #include <asm/arch/hardware.h>
20 #include <asm/arch/periph.h>
21 #include <asm/arch/sdram.h>
22 #include <asm/arch/timer.h>
23 #include <dm/pinctrl.h>
24 #include <dm/root.h>
25 #include <dm/test.h>
26 #include <dm/util.h>
27 #include <power/regulator.h>
28
29 DECLARE_GLOBAL_DATA_PTR;
30
31 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_OF_CONTROL)
32 static int spl_node_to_boot_device(int node)
33 {
34         struct udevice *parent;
35
36         /*
37          * This should eventually move into the SPL code, once SPL becomes
38          * aware of the block-device layer.  Until then (and to avoid unneeded
39          * delays in getting this feature out, it lives at the board-level).
40          */
41         if (!uclass_get_device_by_of_offset(UCLASS_MMC, node, &parent)) {
42                 struct udevice *dev;
43                 struct blk_desc *desc = NULL;
44
45                 for (device_find_first_child(parent, &dev);
46                      dev;
47                      device_find_next_child(&dev)) {
48                         if (device_get_uclass_id(dev) == UCLASS_BLK) {
49                                 desc = dev_get_uclass_platdata(dev);
50                                 break;
51                         }
52                 }
53
54                 if (!desc)
55                         return -ENOENT;
56
57                 switch (desc->devnum) {
58                 case 0:
59                         return BOOT_DEVICE_MMC1;
60                 case 1:
61                         return BOOT_DEVICE_MMC2;
62                 default:
63                         return -ENOSYS;
64                 }
65         }
66
67         /*
68          * SPL doesn't differentiate SPI flashes, so we keep the detection
69          * brief and inaccurate... hopefully, the common SPL layer can be
70          * extended with awareness of the BLK layer (and matching OF_CONTROL)
71          * soon.
72          */
73         if (!uclass_get_device_by_of_offset(UCLASS_SPI_FLASH, node, &parent))
74                 return BOOT_DEVICE_SPI;
75
76         return -1;
77 }
78
79 void board_boot_order(u32 *spl_boot_list)
80 {
81         const void *blob = gd->fdt_blob;
82         int chosen_node = fdt_path_offset(blob, "/chosen");
83         int idx = 0;
84         int elem;
85         int boot_device;
86         int node;
87         const char *conf;
88
89         if (chosen_node < 0) {
90                 debug("%s: /chosen not found, using spl_boot_device()\n",
91                       __func__);
92                 spl_boot_list[0] = spl_boot_device();
93                 return;
94         }
95
96         for (elem = 0;
97              (conf = fdt_stringlist_get(blob, chosen_node,
98                                         "u-boot,spl-boot-order", elem, NULL));
99              elem++) {
100                 /* First check if the list element is an alias */
101                 const char *alias = fdt_get_alias(blob, conf);
102                 if (alias)
103                         conf = alias;
104
105                 /* Try to resolve the config item (or alias) as a path */
106                 node = fdt_path_offset(blob, conf);
107                 if (node < 0) {
108                         debug("%s: could not find %s in FDT", __func__, conf);
109                         continue;
110                 }
111
112                 /* Try to map this back onto SPL boot devices */
113                 boot_device = spl_node_to_boot_device(node);
114                 if (boot_device < 0) {
115                         debug("%s: could not map node @%x to a boot-device\n",
116                               __func__, node);
117                         continue;
118                 }
119
120                 spl_boot_list[idx++] = boot_device;
121         }
122
123         /* If we had no matches, fall back to spl_boot_device */
124         if (idx == 0)
125                 spl_boot_list[0] = spl_boot_device();
126 }
127 #endif
128
129 u32 spl_boot_device(void)
130 {
131         return BOOT_DEVICE_MMC1;
132 }
133
134 u32 spl_boot_mode(const u32 boot_device)
135 {
136         return MMCSD_MODE_RAW;
137 }
138
139 #define TIMER_CHN10_BASE        0xff8680a0
140 #define TIMER_END_COUNT_L       0x00
141 #define TIMER_END_COUNT_H       0x04
142 #define TIMER_INIT_COUNT_L      0x10
143 #define TIMER_INIT_COUNT_H      0x14
144 #define TIMER_CONTROL_REG       0x1c
145
146 #define TIMER_EN        0x1
147 #define TIMER_FMODE     (0 << 1)
148 #define TIMER_RMODE     (1 << 1)
149
150 void secure_timer_init(void)
151 {
152         writel(0xffffffff, TIMER_CHN10_BASE + TIMER_END_COUNT_L);
153         writel(0xffffffff, TIMER_CHN10_BASE + TIMER_END_COUNT_H);
154         writel(0, TIMER_CHN10_BASE + TIMER_INIT_COUNT_L);
155         writel(0, TIMER_CHN10_BASE + TIMER_INIT_COUNT_H);
156         writel(TIMER_EN | TIMER_FMODE, TIMER_CHN10_BASE + TIMER_CONTROL_REG);
157 }
158
159 #define GRF_EMMCCORE_CON11 0xff77f02c
160 #define SGRF_DDR_RGN_CON16 0xff330040
161 void board_init_f(ulong dummy)
162 {
163         struct udevice *pinctrl;
164         struct udevice *dev;
165         int ret;
166
167         /* Example code showing how to enable the debug UART on RK3288 */
168 #include <asm/arch/grf_rk3399.h>
169         /* Enable early UART2 channel C on the RK3399 */
170 #define GRF_BASE        0xff770000
171         struct rk3399_grf_regs * const grf = (void *)GRF_BASE;
172
173         rk_clrsetreg(&grf->gpio4c_iomux,
174                      GRF_GPIO4C3_SEL_MASK,
175                      GRF_UART2DGBC_SIN << GRF_GPIO4C3_SEL_SHIFT);
176         rk_clrsetreg(&grf->gpio4c_iomux,
177                      GRF_GPIO4C4_SEL_MASK,
178                      GRF_UART2DBGC_SOUT << GRF_GPIO4C4_SEL_SHIFT);
179         /* Set channel C as UART2 input */
180         rk_clrsetreg(&grf->soc_con7,
181                      GRF_UART_DBG_SEL_MASK,
182                      GRF_UART_DBG_SEL_C << GRF_UART_DBG_SEL_SHIFT);
183 #define EARLY_UART
184 #ifdef EARLY_UART
185         /*
186          * Debug UART can be used from here if required:
187          *
188          * debug_uart_init();
189          * printch('a');
190          * printhex8(0x1234);
191          * printascii("string");
192          */
193         debug_uart_init();
194         printascii("U-Boot SPL board init");
195 #endif
196         /*  Emmc clock generator: disable the clock multipilier */
197         rk_clrreg(GRF_EMMCCORE_CON11, 0x0ff);
198
199         ret = spl_early_init();
200         if (ret) {
201                 debug("spl_early_init() failed: %d\n", ret);
202                 hang();
203         }
204
205         /*
206          * Disable DDR security regions.
207          *
208          * As we are entered from the BootROM, the region from
209          * 0x0 through 0xfffff (i.e. the first MB of memory) will
210          * be protected. This will cause issues with the DW_MMC
211          * driver, which tries to DMA from/to the stack (likely)
212          * located in this range.
213          */
214         rk_clrsetreg(SGRF_DDR_RGN_CON16, 0x1FF, 0);
215
216         secure_timer_init();
217
218         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
219         if (ret) {
220                 debug("Pinctrl init failed: %d\n", ret);
221                 return;
222         }
223
224         ret = uclass_get_device(UCLASS_RAM, 0, &dev);
225         if (ret) {
226                 debug("DRAM init failed: %d\n", ret);
227                 return;
228         }
229 }
230
231 void spl_board_init(void)
232 {
233         struct udevice *pinctrl;
234         int ret;
235
236         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
237         if (ret) {
238                 debug("%s: Cannot find pinctrl device\n", __func__);
239                 goto err;
240         }
241
242         /* Enable debug UART */
243         ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_UART_DBG);
244         if (ret) {
245                 debug("%s: Failed to set up console UART\n", __func__);
246                 goto err;
247         }
248
249         preloader_console_init();
250 #ifdef CONFIG_ROCKCHIP_SPL_BACK_TO_BROM
251         back_to_bootrom();
252 #endif
253
254         return;
255 err:
256         printf("spl_board_init: Error %d\n", ret);
257
258         /* No way to report error here */
259         hang();
260 }
261
262 #ifdef CONFIG_SPL_LOAD_FIT
263 int board_fit_config_name_match(const char *name)
264 {
265         /* Just empty function now - can't decide what to choose */
266         debug("%s: %s\n", __func__, name);
267
268         return 0;
269 }
270 #endif