1 /*
2  * (C) Copyright 2015 Google, Inc
3  *
4  * SPDX-License-Identifier:     GPL-2.0+
5  */
6 
7 #include <common.h>
8 #include <clk.h>
9 #include <dm.h>
10 #include <ram.h>
11 #include <syscon.h>
12 #include <asm/io.h>
13 #include <asm/arch/clock.h>
14 #include <asm/arch/periph.h>
15 #include <asm/arch/pmu_rk3288.h>
16 #include <asm/arch/qos_rk3288.h>
17 #include <asm/arch/boot_mode.h>
18 #include <asm/gpio.h>
19 #include <dm/pinctrl.h>
20 #include <dt-bindings/clock/rk3288-cru.h>
21 #include <power/regulator.h>
22 
23 DECLARE_GLOBAL_DATA_PTR;
24 
25 #define PMU_BASE	0xff730000
26 
27 static void setup_boot_mode(void)
28 {
29 	struct rk3288_pmu *const pmu = (void *)PMU_BASE;
30 	int boot_mode = readl(&pmu->sys_reg[0]);
31 
32 	debug("boot mode %x.\n", boot_mode);
33 
34 	/* Clear boot mode */
35 	writel(BOOT_NORMAL, &pmu->sys_reg[0]);
36 
37 	switch (boot_mode) {
38 	case BOOT_FASTBOOT:
39 		printf("enter fastboot!\n");
40 		setenv("preboot", "setenv preboot; fastboot usb0");
41 		break;
42 	case BOOT_UMS:
43 		printf("enter UMS!\n");
44 		setenv("preboot", "setenv preboot; if mmc dev 0;"
45 		       "then ums mmc 0; else ums mmc 1;fi");
46 		break;
47 	}
48 }
49 
50 __weak int rk_board_late_init(void)
51 {
52 	return 0;
53 }
54 
55 int rk3288_qos_init(void)
56 {
57 	int val = 2 << PRIORITY_HIGH_SHIFT | 2 << PRIORITY_LOW_SHIFT;
58 	/* set vop qos to higher priority */
59 	writel(val, CPU_AXI_QOS_PRIORITY + VIO0_VOP_QOS);
60 	writel(val, CPU_AXI_QOS_PRIORITY + VIO1_VOP_QOS);
61 
62 	if (!fdt_node_check_compatible(gd->fdt_blob, 0,
63 				       "rockchip,rk3288-tinker"))
64 	{
65 		/* set isp qos to higher priority */
66 		writel(val, CPU_AXI_QOS_PRIORITY + VIO1_ISP_R_QOS);
67 		writel(val, CPU_AXI_QOS_PRIORITY + VIO1_ISP_W0_QOS);
68 		writel(val, CPU_AXI_QOS_PRIORITY + VIO1_ISP_W1_QOS);
69 	}
70 	return 0;
71 }
72 
73 int board_late_init(void)
74 {
75 	setup_boot_mode();
76 	rk3288_qos_init();
77 
78 	return rk_board_late_init();
79 }
80 
81 #if !CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM)
82 static int veyron_init(void)
83 {
84 	struct udevice *dev;
85 	struct clk clk;
86 	int ret;
87 
88 	ret = regulator_get_by_platname("vdd_arm", &dev);
89 	if (ret) {
90 		debug("Cannot set regulator name\n");
91 		return ret;
92 	}
93 
94 	/* Slowly raise to max CPU voltage to prevent overshoot */
95 	ret = regulator_set_value(dev, 1200000);
96 	if (ret)
97 		return ret;
98 	udelay(175); /* Must wait for voltage to stabilize, 2mV/us */
99 	ret = regulator_set_value(dev, 1400000);
100 	if (ret)
101 		return ret;
102 	udelay(100); /* Must wait for voltage to stabilize, 2mV/us */
103 
104 	ret = rockchip_get_clk(&clk.dev);
105 	if (ret)
106 		return ret;
107 	clk.id = PLL_APLL;
108 	ret = clk_set_rate(&clk, 1800000000);
109 	if (IS_ERR_VALUE(ret))
110 		return ret;
111 
112 	return 0;
113 }
114 #endif
115 
116 int board_init(void)
117 {
118 #if CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM)
119 	struct udevice *pinctrl;
120 	int ret;
121 
122 	/*
123 	 * We need to implement sdcard iomux here for the further
124 	 * initlization, otherwise, it'll hit sdcard command sending
125 	 * timeout exception.
126 	 */
127 	ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
128 	if (ret) {
129 		debug("%s: Cannot find pinctrl device\n", __func__);
130 		goto err;
131 	}
132 	ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_SDCARD);
133 	if (ret) {
134 		debug("%s: Failed to set up SD card\n", __func__);
135 		goto err;
136 	}
137 
138 	return 0;
139 err:
140 	printf("board_init: Error %d\n", ret);
141 
142 	/* No way to report error here */
143 	hang();
144 
145 	return -1;
146 #else
147 	int ret;
148 
149 	/* We do some SoC one time setting here */
150 	if (!fdt_node_check_compatible(gd->fdt_blob, 0, "google,veyron")) {
151 		ret = veyron_init();
152 		if (ret)
153 			return ret;
154 	}
155 
156 	return 0;
157 #endif
158 }
159 
160 #ifndef CONFIG_SYS_DCACHE_OFF
161 void enable_caches(void)
162 {
163 	/* Enable D-cache. I-cache is already enabled in start.S */
164 	dcache_enable();
165 }
166 #endif
167 
168 #if defined(CONFIG_USB_GADGET) && defined(CONFIG_USB_GADGET_DWC2_OTG)
169 #include <usb.h>
170 #include <usb/dwc2_udc.h>
171 
172 static struct dwc2_plat_otg_data rk3288_otg_data = {
173 	.rx_fifo_sz	= 512,
174 	.np_tx_fifo_sz	= 16,
175 	.tx_fifo_sz	= 128,
176 };
177 
178 int board_usb_init(int index, enum usb_init_type init)
179 {
180 	int node, phy_node;
181 	const char *mode;
182 	bool matched = false;
183 	const void *blob = gd->fdt_blob;
184 	u32 grf_phy_offset;
185 
186 	/* find the usb_otg node */
187 	node = fdt_node_offset_by_compatible(blob, -1,
188 					"rockchip,rk3288-usb");
189 
190 	while (node > 0) {
191 		mode = fdt_getprop(blob, node, "dr_mode", NULL);
192 		if (mode && strcmp(mode, "otg") == 0) {
193 			matched = true;
194 			break;
195 		}
196 
197 		node = fdt_node_offset_by_compatible(blob, node,
198 					"rockchip,rk3288-usb");
199 	}
200 	if (!matched) {
201 		debug("Not found usb_otg device\n");
202 		return -ENODEV;
203 	}
204 	rk3288_otg_data.regs_otg = fdtdec_get_addr(blob, node, "reg");
205 
206 	node = fdtdec_lookup_phandle(blob, node, "phys");
207 	if (node <= 0) {
208 		debug("Not found usb phy device\n");
209 		return -ENODEV;
210 	}
211 
212 	phy_node = fdt_parent_offset(blob, node);
213 	if (phy_node <= 0) {
214 		debug("Not found usb phy device\n");
215 		return -ENODEV;
216 	}
217 
218 	rk3288_otg_data.phy_of_node = phy_node;
219 	grf_phy_offset = fdtdec_get_addr(blob, node, "reg");
220 
221 	/* find the grf node */
222 	node = fdt_node_offset_by_compatible(blob, -1,
223 					"rockchip,rk3288-grf");
224 	if (node <= 0) {
225 		debug("Not found grf device\n");
226 		return -ENODEV;
227 	}
228 	rk3288_otg_data.regs_phy = grf_phy_offset +
229 				fdtdec_get_addr(blob, node, "reg");
230 
231 	return dwc2_udc_probe(&rk3288_otg_data);
232 }
233 
234 int board_usb_cleanup(int index, enum usb_init_type init)
235 {
236 	return 0;
237 }
238 #endif
239 
240 static int do_clock(cmd_tbl_t *cmdtp, int flag, int argc,
241 		       char * const argv[])
242 {
243 	static const struct {
244 		char *name;
245 		int id;
246 	} clks[] = {
247 		{ "osc", CLK_OSC },
248 		{ "apll", CLK_ARM },
249 		{ "dpll", CLK_DDR },
250 		{ "cpll", CLK_CODEC },
251 		{ "gpll", CLK_GENERAL },
252 #ifdef CONFIG_ROCKCHIP_RK3036
253 		{ "mpll", CLK_NEW },
254 #else
255 		{ "npll", CLK_NEW },
256 #endif
257 	};
258 	int ret, i;
259 	struct udevice *dev;
260 
261 	ret = rockchip_get_clk(&dev);
262 	if (ret) {
263 		printf("clk-uclass not found\n");
264 		return 0;
265 	}
266 
267 	for (i = 0; i < ARRAY_SIZE(clks); i++) {
268 		struct clk clk;
269 		ulong rate;
270 
271 		clk.id = clks[i].id;
272 		ret = clk_request(dev, &clk);
273 		if (ret < 0)
274 			continue;
275 
276 		rate = clk_get_rate(&clk);
277 		printf("%s: %lu\n", clks[i].name, rate);
278 
279 		clk_free(&clk);
280 	}
281 
282 	return 0;
283 }
284 
285 U_BOOT_CMD(
286 	clock, 2, 1, do_clock,
287 	"display information about clocks",
288 	""
289 );
290 
291 #define GRF_SOC_CON2 0xff77024c
292 
293 int board_early_init_f(void)
294 {
295 	struct udevice *pinctrl;
296 	struct udevice *dev;
297 	int ret;
298 
299 	/*
300 	 * This init is done in SPL, but when chain-loading U-Boot SPL will
301 	 * have been skipped. Allow the clock driver to check if it needs
302 	 * setting up.
303 	 */
304 	ret = rockchip_get_clk(&dev);
305 	if (ret) {
306 		debug("CLK init failed: %d\n", ret);
307 		return ret;
308 	}
309 	ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
310 	if (ret) {
311 		debug("%s: Cannot find pinctrl device\n", __func__);
312 		return ret;
313 	}
314 
315 	/* Enable debug UART */
316 	ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_UART_DBG);
317 	if (ret) {
318 		debug("%s: Failed to set up console UART\n", __func__);
319 		return ret;
320 	}
321 	rk_setreg(GRF_SOC_CON2, 1 << 0);
322 
323 	return 0;
324 }
325