1 /*
2 * (C) Copyright 2012-2013,2015 Stephen Warren
3 *
4 * SPDX-License-Identifier: GPL-2.0
5 */
6
7 #include <common.h>
8 #include <config.h>
9 #include <dm.h>
10 #include <fdt_support.h>
11 #include <fdt_simplefb.h>
12 #include <lcd.h>
13 #include <mmc.h>
14 #include <asm/gpio.h>
15 #include <asm/arch/mbox.h>
16 #include <asm/arch/sdhci.h>
17 #include <asm/global_data.h>
18 #include <dm/platform_data/serial_pl01x.h>
19
20 DECLARE_GLOBAL_DATA_PTR;
21
22 static const struct bcm2835_gpio_platdata gpio_platdata = {
23 .base = BCM2835_GPIO_BASE,
24 };
25
26 U_BOOT_DEVICE(bcm2835_gpios) = {
27 .name = "gpio_bcm2835",
28 .platdata = &gpio_platdata,
29 };
30
31 static const struct pl01x_serial_platdata serial_platdata = {
32 #ifdef CONFIG_BCM2836
33 .base = 0x3f201000,
34 #else
35 .base = 0x20201000,
36 #endif
37 .type = TYPE_PL011,
38 .clock = 3000000,
39 };
40
41 U_BOOT_DEVICE(bcm2835_serials) = {
42 .name = "serial_pl01x",
43 .platdata = &serial_platdata,
44 };
45
46 struct msg_get_arm_mem {
47 struct bcm2835_mbox_hdr hdr;
48 struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
49 u32 end_tag;
50 };
51
52 struct msg_get_board_rev {
53 struct bcm2835_mbox_hdr hdr;
54 struct bcm2835_mbox_tag_get_board_rev get_board_rev;
55 u32 end_tag;
56 };
57
58 struct msg_get_mac_address {
59 struct bcm2835_mbox_hdr hdr;
60 struct bcm2835_mbox_tag_get_mac_address get_mac_address;
61 u32 end_tag;
62 };
63
64 struct msg_set_power_state {
65 struct bcm2835_mbox_hdr hdr;
66 struct bcm2835_mbox_tag_set_power_state set_power_state;
67 u32 end_tag;
68 };
69
70 struct msg_get_clock_rate {
71 struct bcm2835_mbox_hdr hdr;
72 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
73 u32 end_tag;
74 };
75
76 /* See comments in mbox.h for data source */
77 static const struct {
78 const char *name;
79 const char *fdtfile;
80 bool has_onboard_eth;
81 } models[] = {
82 [0] = {
83 "Unknown model",
84 #ifdef CONFIG_BCM2836
85 "bcm2836-rpi-other.dtb",
86 #else
87 "bcm2835-rpi-other.dtb",
88 #endif
89 false,
90 },
91 #ifdef CONFIG_BCM2836
92 [BCM2836_BOARD_REV_2_B] = {
93 "2 Model B",
94 "bcm2836-rpi-2-b.dtb",
95 true,
96 },
97 #else
98 [BCM2835_BOARD_REV_B_I2C0_2] = {
99 "Model B (no P5)",
100 "bcm2835-rpi-b-i2c0.dtb",
101 true,
102 },
103 [BCM2835_BOARD_REV_B_I2C0_3] = {
104 "Model B (no P5)",
105 "bcm2835-rpi-b-i2c0.dtb",
106 true,
107 },
108 [BCM2835_BOARD_REV_B_I2C1_4] = {
109 "Model B",
110 "bcm2835-rpi-b.dtb",
111 true,
112 },
113 [BCM2835_BOARD_REV_B_I2C1_5] = {
114 "Model B",
115 "bcm2835-rpi-b.dtb",
116 true,
117 },
118 [BCM2835_BOARD_REV_B_I2C1_6] = {
119 "Model B",
120 "bcm2835-rpi-b.dtb",
121 true,
122 },
123 [BCM2835_BOARD_REV_A_7] = {
124 "Model A",
125 "bcm2835-rpi-a.dtb",
126 false,
127 },
128 [BCM2835_BOARD_REV_A_8] = {
129 "Model A",
130 "bcm2835-rpi-a.dtb",
131 false,
132 },
133 [BCM2835_BOARD_REV_A_9] = {
134 "Model A",
135 "bcm2835-rpi-a.dtb",
136 false,
137 },
138 [BCM2835_BOARD_REV_B_REV2_d] = {
139 "Model B rev2",
140 "bcm2835-rpi-b-rev2.dtb",
141 true,
142 },
143 [BCM2835_BOARD_REV_B_REV2_e] = {
144 "Model B rev2",
145 "bcm2835-rpi-b-rev2.dtb",
146 true,
147 },
148 [BCM2835_BOARD_REV_B_REV2_f] = {
149 "Model B rev2",
150 "bcm2835-rpi-b-rev2.dtb",
151 true,
152 },
153 [BCM2835_BOARD_REV_B_PLUS] = {
154 "Model B+",
155 "bcm2835-rpi-b-plus.dtb",
156 true,
157 },
158 [BCM2835_BOARD_REV_CM] = {
159 "Compute Module",
160 "bcm2835-rpi-cm.dtb",
161 false,
162 },
163 [BCM2835_BOARD_REV_A_PLUS] = {
164 "Model A+",
165 "bcm2835-rpi-a-plus.dtb",
166 false,
167 },
168 [BCM2835_BOARD_REV_B_PLUS_13] = {
169 "Model B+",
170 "bcm2835-rpi-b-plus.dtb",
171 true,
172 },
173 [BCM2835_BOARD_REV_CM_14] = {
174 "Compute Module",
175 "bcm2835-rpi-cm.dtb",
176 false,
177 },
178 #endif
179 };
180
181 u32 rpi_board_rev = 0;
182
dram_init(void)183 int dram_init(void)
184 {
185 ALLOC_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1, 16);
186 int ret;
187
188 BCM2835_MBOX_INIT_HDR(msg);
189 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
190
191 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
192 if (ret) {
193 printf("bcm2835: Could not query ARM memory size\n");
194 return -1;
195 }
196
197 gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
198
199 return 0;
200 }
201
set_fdtfile(void)202 static void set_fdtfile(void)
203 {
204 const char *fdtfile;
205
206 if (getenv("fdtfile"))
207 return;
208
209 fdtfile = models[rpi_board_rev].fdtfile;
210 setenv("fdtfile", fdtfile);
211 }
212
set_usbethaddr(void)213 static void set_usbethaddr(void)
214 {
215 ALLOC_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1, 16);
216 int ret;
217
218 if (!models[rpi_board_rev].has_onboard_eth)
219 return;
220
221 if (getenv("usbethaddr"))
222 return;
223
224 BCM2835_MBOX_INIT_HDR(msg);
225 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
226
227 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
228 if (ret) {
229 printf("bcm2835: Could not query MAC address\n");
230 /* Ignore error; not critical */
231 return;
232 }
233
234 eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
235
236 return;
237 }
238
misc_init_r(void)239 int misc_init_r(void)
240 {
241 set_fdtfile();
242 set_usbethaddr();
243 return 0;
244 }
245
power_on_module(u32 module)246 static int power_on_module(u32 module)
247 {
248 ALLOC_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1, 16);
249 int ret;
250
251 BCM2835_MBOX_INIT_HDR(msg_pwr);
252 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state,
253 SET_POWER_STATE);
254 msg_pwr->set_power_state.body.req.device_id = module;
255 msg_pwr->set_power_state.body.req.state =
256 BCM2835_MBOX_SET_POWER_STATE_REQ_ON |
257 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT;
258
259 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN,
260 &msg_pwr->hdr);
261 if (ret) {
262 printf("bcm2835: Could not set module %u power state\n",
263 module);
264 return -1;
265 }
266
267 return 0;
268 }
269
get_board_rev(void)270 static void get_board_rev(void)
271 {
272 ALLOC_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1, 16);
273 int ret;
274 const char *name;
275
276 BCM2835_MBOX_INIT_HDR(msg);
277 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
278
279 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
280 if (ret) {
281 printf("bcm2835: Could not query board revision\n");
282 /* Ignore error; not critical */
283 return;
284 }
285
286 /*
287 * For details of old-vs-new scheme, see:
288 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
289 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
290 * (a few posts down)
291 *
292 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
293 * lower byte to use as the board rev:
294 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
295 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
296 */
297 rpi_board_rev = msg->get_board_rev.body.resp.rev;
298 if (rpi_board_rev & 0x800000)
299 rpi_board_rev = (rpi_board_rev >> 4) & 0xff;
300 else
301 rpi_board_rev &= 0xff;
302 if (rpi_board_rev >= ARRAY_SIZE(models)) {
303 printf("RPI: Board rev %u outside known range\n",
304 rpi_board_rev);
305 rpi_board_rev = 0;
306 }
307 if (!models[rpi_board_rev].name) {
308 printf("RPI: Board rev %u unknown\n", rpi_board_rev);
309 rpi_board_rev = 0;
310 }
311
312 name = models[rpi_board_rev].name;
313 printf("RPI %s\n", name);
314 }
315
board_init(void)316 int board_init(void)
317 {
318 get_board_rev();
319
320 gd->bd->bi_boot_params = 0x100;
321
322 return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
323 }
324
board_mmc_init(bd_t * bis)325 int board_mmc_init(bd_t *bis)
326 {
327 ALLOC_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1, 16);
328 int ret;
329
330 power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI);
331
332 BCM2835_MBOX_INIT_HDR(msg_clk);
333 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE);
334 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC;
335
336 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr);
337 if (ret) {
338 printf("bcm2835: Could not query eMMC clock rate\n");
339 return -1;
340 }
341
342 return bcm2835_sdhci_init(BCM2835_SDHCI_BASE,
343 msg_clk->get_clock_rate.body.resp.rate_hz);
344 }
345
ft_board_setup(void * blob,bd_t * bd)346 int ft_board_setup(void *blob, bd_t *bd)
347 {
348 /*
349 * For now, we simply always add the simplefb DT node. Later, we
350 * should be more intelligent, and e.g. only do this if no enabled DT
351 * node exists for the "real" graphics driver.
352 */
353 lcd_dt_simplefb_add_node(blob);
354
355 return 0;
356 }
357