96fe87064533cd7797593f0001fe27cf578058e7
[karo-tx-uboot.git] / board / raspberrypi / rpi / rpi.c
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
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
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
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
239 int misc_init_r(void)
240 {
241         set_fdtfile();
242         set_usbethaddr();
243         return 0;
244 }
245
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
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
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
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
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 }