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2444dae5 SG |
1 | /* |
2 | * (C) Copyright 2015 Google, Inc | |
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 <ram.h> | |
14 | #include <spl.h> | |
15 | #include <asm/gpio.h> | |
16 | #include <asm/io.h> | |
17 | #include <asm/arch/clock.h> | |
18 | #include <asm/arch/hardware.h> | |
19 | #include <asm/arch/periph.h> | |
20 | #include <asm/arch/sdram.h> | |
21 | #include <dm/pinctrl.h> | |
22 | #include <dm/root.h> | |
23 | #include <dm/test.h> | |
24 | #include <dm/util.h> | |
25 | #include <power/regulator.h> | |
26 | ||
27 | DECLARE_GLOBAL_DATA_PTR; | |
28 | ||
29 | u32 spl_boot_device(void) | |
30 | { | |
31 | const void *blob = gd->fdt_blob; | |
32 | struct udevice *dev; | |
33 | const char *bootdev; | |
34 | int node; | |
35 | int ret; | |
36 | ||
37 | bootdev = fdtdec_get_config_string(blob, "u-boot,boot0"); | |
38 | debug("Boot device %s\n", bootdev); | |
39 | if (!bootdev) | |
40 | goto fallback; | |
41 | ||
42 | node = fdt_path_offset(blob, bootdev); | |
43 | if (node < 0) { | |
44 | debug("node=%d\n", node); | |
45 | goto fallback; | |
46 | } | |
47 | ret = device_get_global_by_of_offset(node, &dev); | |
48 | if (ret) { | |
49 | debug("device at node %s/%d not found: %d\n", bootdev, node, | |
50 | ret); | |
51 | goto fallback; | |
52 | } | |
53 | debug("Found device %s\n", dev->name); | |
54 | switch (device_get_uclass_id(dev)) { | |
55 | case UCLASS_SPI_FLASH: | |
56 | return BOOT_DEVICE_SPI; | |
57 | case UCLASS_MMC: | |
58 | return BOOT_DEVICE_MMC1; | |
59 | default: | |
60 | debug("Booting from device uclass '%s' not supported\n", | |
61 | dev_get_uclass_name(dev)); | |
62 | } | |
63 | ||
64 | fallback: | |
65 | return BOOT_DEVICE_MMC1; | |
66 | } | |
67 | ||
68 | u32 spl_boot_mode(void) | |
69 | { | |
70 | return MMCSD_MODE_RAW; | |
71 | } | |
72 | ||
73 | /* read L2 control register (L2CTLR) */ | |
74 | static inline uint32_t read_l2ctlr(void) | |
75 | { | |
76 | uint32_t val = 0; | |
77 | ||
78 | asm volatile ("mrc p15, 1, %0, c9, c0, 2" : "=r" (val)); | |
79 | ||
80 | return val; | |
81 | } | |
82 | ||
83 | /* write L2 control register (L2CTLR) */ | |
84 | static inline void write_l2ctlr(uint32_t val) | |
85 | { | |
86 | /* | |
87 | * Note: L2CTLR can only be written when the L2 memory system | |
88 | * is idle, ie before the MMU is enabled. | |
89 | */ | |
90 | asm volatile("mcr p15, 1, %0, c9, c0, 2" : : "r" (val) : "memory"); | |
91 | isb(); | |
92 | } | |
93 | ||
94 | static void configure_l2ctlr(void) | |
95 | { | |
96 | uint32_t l2ctlr; | |
97 | ||
98 | l2ctlr = read_l2ctlr(); | |
99 | l2ctlr &= 0xfffc0000; /* clear bit0~bit17 */ | |
100 | ||
101 | /* | |
102 | * Data RAM write latency: 2 cycles | |
103 | * Data RAM read latency: 2 cycles | |
104 | * Data RAM setup latency: 1 cycle | |
105 | * Tag RAM write latency: 1 cycle | |
106 | * Tag RAM read latency: 1 cycle | |
107 | * Tag RAM setup latency: 1 cycle | |
108 | */ | |
109 | l2ctlr |= (1 << 3 | 1 << 0); | |
110 | write_l2ctlr(l2ctlr); | |
111 | } | |
112 | ||
113 | struct rk3288_timer { | |
114 | u32 timer_load_count0; | |
115 | u32 timer_load_count1; | |
116 | u32 timer_curr_value0; | |
117 | u32 timer_curr_value1; | |
118 | u32 timer_ctrl_reg; | |
119 | u32 timer_int_status; | |
120 | }; | |
121 | ||
122 | void init_timer(void) | |
123 | { | |
124 | struct rk3288_timer * const timer7_ptr = (void *)TIMER7_BASE; | |
125 | ||
126 | writel(0xffffffff, &timer7_ptr->timer_load_count0); | |
127 | writel(0xffffffff, &timer7_ptr->timer_load_count1); | |
128 | writel(1, &timer7_ptr->timer_ctrl_reg); | |
129 | } | |
130 | ||
131 | static int configure_emmc(struct udevice *pinctrl) | |
132 | { | |
133 | struct gpio_desc desc; | |
134 | int ret; | |
135 | ||
136 | pinctrl_request_noflags(pinctrl, PERIPH_ID_EMMC); | |
137 | ||
138 | /* | |
139 | * TODO(sjg@chromium.org): Pick this up from device tree or perhaps | |
140 | * use the EMMC_PWREN setting. | |
141 | */ | |
142 | ret = dm_gpio_lookup_name("D9", &desc); | |
143 | if (ret) { | |
144 | debug("gpio ret=%d\n", ret); | |
145 | return ret; | |
146 | } | |
147 | ret = dm_gpio_request(&desc, "emmc_pwren"); | |
148 | if (ret) { | |
149 | debug("gpio_request ret=%d\n", ret); | |
150 | return ret; | |
151 | } | |
152 | ret = dm_gpio_set_dir_flags(&desc, GPIOD_IS_OUT); | |
153 | if (ret) { | |
154 | debug("gpio dir ret=%d\n", ret); | |
155 | return ret; | |
156 | } | |
157 | ret = dm_gpio_set_value(&desc, 1); | |
158 | if (ret) { | |
159 | debug("gpio value ret=%d\n", ret); | |
160 | return ret; | |
161 | } | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
166 | void board_init_f(ulong dummy) | |
167 | { | |
168 | struct udevice *pinctrl; | |
169 | struct udevice *dev; | |
170 | int ret; | |
171 | ||
172 | /* Example code showing how to enable the debug UART on RK3288 */ | |
173 | #ifdef EARLY_UART | |
174 | #include <asm/arch/grf_rk3288.h> | |
175 | /* Enable early UART on the RK3288 */ | |
176 | #define GRF_BASE 0xff770000 | |
177 | struct rk3288_grf * const grf = (void *)GRF_BASE; | |
178 | ||
179 | rk_clrsetreg(&grf->gpio7ch_iomux, GPIO7C7_MASK << GPIO7C7_SHIFT | | |
180 | GPIO7C6_MASK << GPIO7C6_SHIFT, | |
181 | GPIO7C7_UART2DBG_SOUT << GPIO7C7_SHIFT | | |
182 | GPIO7C6_UART2DBG_SIN << GPIO7C6_SHIFT); | |
183 | /* | |
184 | * Debug UART can be used from here if required: | |
185 | * | |
186 | * debug_uart_init(); | |
187 | * printch('a'); | |
188 | * printhex8(0x1234); | |
189 | * printascii("string"); | |
190 | */ | |
191 | debug_uart_init(); | |
192 | #endif | |
193 | ||
194 | ret = spl_init(); | |
195 | if (ret) { | |
196 | debug("spl_init() failed: %d\n", ret); | |
197 | hang(); | |
198 | } | |
199 | ||
200 | init_timer(); | |
201 | configure_l2ctlr(); | |
202 | ||
203 | ret = uclass_get_device(UCLASS_CLK, 0, &dev); | |
204 | if (ret) { | |
205 | debug("CLK init failed: %d\n", ret); | |
206 | return; | |
207 | } | |
208 | ||
209 | ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl); | |
210 | if (ret) { | |
211 | debug("Pinctrl init failed: %d\n", ret); | |
212 | return; | |
213 | } | |
214 | ||
215 | ret = uclass_get_device(UCLASS_RAM, 0, &dev); | |
216 | if (ret) { | |
217 | debug("DRAM init failed: %d\n", ret); | |
218 | return; | |
219 | } | |
b1f492ca SS |
220 | |
221 | /* | |
222 | * Now that DRAM is initialized setup base pointer for simple malloc | |
223 | * into RAM. | |
224 | */ | |
225 | gd->malloc_base = CONFIG_SPL_STACK_R_ADDR; | |
226 | gd->malloc_ptr = 0; | |
2444dae5 SG |
227 | } |
228 | ||
229 | static int setup_led(void) | |
230 | { | |
231 | #ifdef CONFIG_SPL_LED | |
232 | struct udevice *dev; | |
233 | char *led_name; | |
234 | int ret; | |
235 | ||
236 | led_name = fdtdec_get_config_string(gd->fdt_blob, "u-boot,boot-led"); | |
237 | if (!led_name) | |
238 | return 0; | |
239 | ret = led_get_by_label(led_name, &dev); | |
240 | if (ret) { | |
241 | debug("%s: get=%d\n", __func__, ret); | |
242 | return ret; | |
243 | } | |
244 | ret = led_set_on(dev, 1); | |
245 | if (ret) | |
246 | return ret; | |
247 | #endif | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
252 | void spl_board_init(void) | |
253 | { | |
254 | struct udevice *pinctrl; | |
255 | int ret; | |
256 | ||
257 | ret = setup_led(); | |
258 | ||
259 | if (ret) { | |
260 | debug("LED ret=%d\n", ret); | |
261 | hang(); | |
262 | } | |
263 | ||
264 | ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl); | |
265 | if (ret) { | |
266 | debug("%s: Cannot find pinctrl device\n", __func__); | |
267 | goto err; | |
268 | } | |
269 | ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_SDCARD); | |
270 | if (ret) { | |
271 | debug("%s: Failed to set up SD card\n", __func__); | |
272 | goto err; | |
273 | } | |
274 | ret = configure_emmc(pinctrl); | |
275 | if (ret) { | |
276 | debug("%s: Failed to set up eMMC\n", __func__); | |
277 | goto err; | |
278 | } | |
279 | ||
280 | /* Enable debug UART */ | |
281 | ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_UART_DBG); | |
282 | if (ret) { | |
283 | debug("%s: Failed to set up console UART\n", __func__); | |
284 | goto err; | |
285 | } | |
286 | ||
287 | preloader_console_init(); | |
288 | return; | |
289 | err: | |
290 | printf("spl_board_init: Error %d\n", ret); | |
291 | ||
292 | /* No way to report error here */ | |
293 | hang(); | |
294 | } |