1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Board specific initialization for AM654 EVM
4 *
5 * Copyright (C) 2017-2018 Texas Instruments Incorporated - http://www.ti.com/
6 * Lokesh Vutla <lokeshvutla@ti.com>
7 *
8 */
9
10 #include <common.h>
11 #include <dm.h>
12 #include <fdt_support.h>
13 #include <image.h>
14 #include <init.h>
15 #include <net.h>
16 #include <asm/arch/sys_proto.h>
17 #include <asm/arch/hardware.h>
18 #include <asm/gpio.h>
19 #include <asm/io.h>
20 #include <asm/omap_common.h>
21 #include <env.h>
22 #include <spl.h>
23 #include <asm/arch/sys_proto.h>
24
25 #include "../common/board_detect.h"
26
27 #define board_is_am65x_base_board() board_ti_is("AM6-COMPROCEVM")
28
29 /* Daughter card presence detection signals */
30 enum {
31 AM65X_EVM_APP_BRD_DET,
32 AM65X_EVM_LCD_BRD_DET,
33 AM65X_EVM_SERDES_BRD_DET,
34 AM65X_EVM_HDMI_GPMC_BRD_DET,
35 AM65X_EVM_BRD_DET_COUNT,
36 };
37
38 /* Max number of MAC addresses that are parsed/processed per daughter card */
39 #define DAUGHTER_CARD_NO_OF_MAC_ADDR 8
40
41 DECLARE_GLOBAL_DATA_PTR;
42
board_init(void)43 int board_init(void)
44 {
45 return 0;
46 }
47
dram_init(void)48 int dram_init(void)
49 {
50 #ifdef CONFIG_PHYS_64BIT
51 gd->ram_size = 0x100000000;
52 #else
53 gd->ram_size = 0x80000000;
54 #endif
55
56 return 0;
57 }
58
board_get_usable_ram_top(ulong total_size)59 ulong board_get_usable_ram_top(ulong total_size)
60 {
61 #ifdef CONFIG_PHYS_64BIT
62 /* Limit RAM used by U-Boot to the DDR low region */
63 if (gd->ram_top > 0x100000000)
64 return 0x100000000;
65 #endif
66
67 return gd->ram_top;
68 }
69
dram_init_banksize(void)70 int dram_init_banksize(void)
71 {
72 /* Bank 0 declares the memory available in the DDR low region */
73 gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
74 gd->bd->bi_dram[0].size = 0x80000000;
75 gd->ram_size = 0x80000000;
76
77 #ifdef CONFIG_PHYS_64BIT
78 /* Bank 1 declares the memory available in the DDR high region */
79 gd->bd->bi_dram[1].start = CONFIG_SYS_SDRAM_BASE1;
80 gd->bd->bi_dram[1].size = 0x80000000;
81 gd->ram_size = 0x100000000;
82 #endif
83
84 return 0;
85 }
86
87 #ifdef CONFIG_SPL_LOAD_FIT
board_fit_config_name_match(const char * name)88 int board_fit_config_name_match(const char *name)
89 {
90 #ifdef CONFIG_TARGET_AM654_A53_EVM
91 if (!strcmp(name, "k3-am654-base-board"))
92 return 0;
93 #endif
94
95 return -1;
96 }
97 #endif
98
99 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
ft_board_setup(void * blob,bd_t * bd)100 int ft_board_setup(void *blob, bd_t *bd)
101 {
102 int ret;
103
104 ret = fdt_fixup_msmc_ram(blob, "/interconnect@100000", "sram@70000000");
105 if (ret) {
106 printf("%s: fixing up msmc ram failed %d\n", __func__, ret);
107 return ret;
108 }
109
110 #if defined(CONFIG_TI_SECURE_DEVICE)
111 /* Make HW RNG reserved for secure world use */
112 ret = fdt_disable_node(blob, "/interconnect@100000/trng@4e10000");
113 if (ret)
114 printf("%s: disabling TRGN failed %d\n", __func__, ret);
115 #endif
116
117 return 0;
118 }
119 #endif
120
do_board_detect(void)121 int do_board_detect(void)
122 {
123 int ret;
124
125 ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
126 CONFIG_EEPROM_CHIP_ADDRESS);
127 if (ret)
128 pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
129 CONFIG_EEPROM_CHIP_ADDRESS, ret);
130
131 return ret;
132 }
133
checkboard(void)134 int checkboard(void)
135 {
136 struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
137
138 if (do_board_detect())
139 /* EEPROM not populated */
140 printf("Board: %s rev %s\n", "AM6-COMPROCEVM", "E3");
141 else
142 printf("Board: %s rev %s\n", ep->name, ep->version);
143
144 return 0;
145 }
146
setup_board_eeprom_env(void)147 static void setup_board_eeprom_env(void)
148 {
149 char *name = "am65x";
150
151 if (do_board_detect())
152 goto invalid_eeprom;
153
154 if (board_is_am65x_base_board())
155 name = "am65x";
156 else
157 printf("Unidentified board claims %s in eeprom header\n",
158 board_ti_get_name());
159
160 invalid_eeprom:
161 set_board_info_env_am6(name);
162 }
163
init_daughtercard_det_gpio(char * gpio_name,struct gpio_desc * desc)164 static int init_daughtercard_det_gpio(char *gpio_name, struct gpio_desc *desc)
165 {
166 int ret;
167
168 memset(desc, 0, sizeof(*desc));
169
170 ret = dm_gpio_lookup_name(gpio_name, desc);
171 if (ret < 0)
172 return ret;
173
174 /* Request GPIO, simply re-using the name as label */
175 ret = dm_gpio_request(desc, gpio_name);
176 if (ret < 0)
177 return ret;
178
179 return dm_gpio_set_dir_flags(desc, GPIOD_IS_IN);
180 }
181
probe_daughtercards(void)182 static int probe_daughtercards(void)
183 {
184 struct ti_am6_eeprom ep;
185 struct gpio_desc board_det_gpios[AM65X_EVM_BRD_DET_COUNT];
186 char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
187 u8 mac_addr_cnt;
188 char name_overlays[1024] = { 0 };
189 int i, j;
190 int ret;
191
192 /*
193 * Daughter card presence detection signal name to GPIO (via I2C I/O
194 * expander @ address 0x38) name and EEPROM I2C address mapping.
195 */
196 const struct {
197 char *gpio_name;
198 u8 i2c_addr;
199 } slot_map[AM65X_EVM_BRD_DET_COUNT] = {
200 { "gpio@38_0", 0x52, }, /* AM65X_EVM_APP_BRD_DET */
201 { "gpio@38_1", 0x55, }, /* AM65X_EVM_LCD_BRD_DET */
202 { "gpio@38_2", 0x54, }, /* AM65X_EVM_SERDES_BRD_DET */
203 { "gpio@38_3", 0x53, }, /* AM65X_EVM_HDMI_GPMC_BRD_DET */
204 };
205
206 /* Declaration of daughtercards to probe */
207 const struct {
208 u8 slot_index; /* Slot the card is installed */
209 char *card_name; /* EEPROM-programmed card name */
210 char *dtbo_name; /* Device tree overlay to apply */
211 u8 eth_offset; /* ethXaddr MAC address index offset */
212 } cards[] = {
213 {
214 AM65X_EVM_APP_BRD_DET,
215 "AM6-GPAPPEVM",
216 "k3-am654-gp.dtbo",
217 0,
218 },
219 {
220 AM65X_EVM_APP_BRD_DET,
221 "AM6-IDKAPPEVM",
222 "k3-am654-idk.dtbo",
223 3,
224 },
225 {
226 AM65X_EVM_SERDES_BRD_DET,
227 "SER-PCIE2LEVM",
228 "k3-am654-pcie-usb2.dtbo",
229 0,
230 },
231 {
232 AM65X_EVM_SERDES_BRD_DET,
233 "SER-PCIEUSBEVM",
234 "k3-am654-pcie-usb3.dtbo",
235 0,
236 },
237 {
238 AM65X_EVM_LCD_BRD_DET,
239 "OLDI-LCD1EVM",
240 "k3-am654-evm-oldi-lcd1evm.dtbo",
241 0,
242 },
243 };
244
245 /*
246 * Initialize GPIO used for daughtercard slot presence detection and
247 * keep the resulting handles in local array for easier access.
248 */
249 for (i = 0; i < AM65X_EVM_BRD_DET_COUNT; i++) {
250 ret = init_daughtercard_det_gpio(slot_map[i].gpio_name,
251 &board_det_gpios[i]);
252 if (ret < 0)
253 return ret;
254 }
255
256 for (i = 0; i < ARRAY_SIZE(cards); i++) {
257 /* Obtain card-specific slot index and associated I2C address */
258 u8 slot_index = cards[i].slot_index;
259 u8 i2c_addr = slot_map[slot_index].i2c_addr;
260
261 /*
262 * The presence detection signal is active-low, hence skip
263 * over this card slot if anything other than 0 is returned.
264 */
265 ret = dm_gpio_get_value(&board_det_gpios[slot_index]);
266 if (ret < 0)
267 return ret;
268 else if (ret)
269 continue;
270
271 /* Get and parse the daughter card EEPROM record */
272 ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS, i2c_addr,
273 &ep,
274 (char **)mac_addr,
275 DAUGHTER_CARD_NO_OF_MAC_ADDR,
276 &mac_addr_cnt);
277 if (ret) {
278 pr_err("Reading daughtercard EEPROM at 0x%02x failed %d\n",
279 i2c_addr, ret);
280 /*
281 * Even this is pretty serious let's just skip over
282 * this particular daughtercard, rather than ending
283 * the probing process altogether.
284 */
285 continue;
286 }
287
288 /* Only process the parsed data if we found a match */
289 if (strncmp(ep.name, cards[i].card_name, sizeof(ep.name)))
290 continue;
291
292 printf("Detected: %s rev %s\n", ep.name, ep.version);
293
294 /*
295 * Populate any MAC addresses from daughtercard into the U-Boot
296 * environment, starting with a card-specific offset so we can
297 * have multiple cards contribute to the MAC pool in a well-
298 * defined manner.
299 */
300 for (j = 0; j < mac_addr_cnt; j++) {
301 if (!is_valid_ethaddr((u8 *)mac_addr[j]))
302 continue;
303
304 eth_env_set_enetaddr_by_index("eth",
305 cards[i].eth_offset + j,
306 (uchar *)mac_addr[j]);
307 }
308
309 /* Skip if no overlays are to be added */
310 if (!strlen(cards[i].dtbo_name))
311 continue;
312
313 /*
314 * Make sure we are not running out of buffer space by checking
315 * if we can fit the new overlay, a trailing space to be used
316 * as a separator, plus the terminating zero.
317 */
318 if (strlen(name_overlays) + strlen(cards[i].dtbo_name) + 2 >
319 sizeof(name_overlays))
320 return -ENOMEM;
321
322 /* Append to our list of overlays */
323 strcat(name_overlays, cards[i].dtbo_name);
324 strcat(name_overlays, " ");
325 }
326
327 /* Apply device tree overlay(s) to the U-Boot environment, if any */
328 if (strlen(name_overlays))
329 return env_set("name_overlays", name_overlays);
330
331 return 0;
332 }
333
board_late_init(void)334 int board_late_init(void)
335 {
336 struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
337
338 setup_board_eeprom_env();
339
340 /*
341 * The first MAC address for ethernet a.k.a. ethernet0 comes from
342 * efuse populated via the am654 gigabit eth switch subsystem driver.
343 * All the other ones are populated via EEPROM, hence continue with
344 * an index of 1.
345 */
346 board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt);
347
348 /* Check for and probe any plugged-in daughtercards */
349 probe_daughtercards();
350
351 return 0;
352 }
353