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/global_data.h>
19 #include <asm/gpio.h>
20 #include <asm/io.h>
21 #include <asm/omap_common.h>
22 #include <env.h>
23 #include <spl.h>
24 #include <asm/arch/sys_proto.h>
25
26 #include "../common/board_detect.h"
27
28 #define board_is_am65x_base_board() board_ti_is("AM6-COMPROCEVM")
29
30 /* Daughter card presence detection signals */
31 enum {
32 AM65X_EVM_APP_BRD_DET,
33 AM65X_EVM_LCD_BRD_DET,
34 AM65X_EVM_SERDES_BRD_DET,
35 AM65X_EVM_HDMI_GPMC_BRD_DET,
36 AM65X_EVM_BRD_DET_COUNT,
37 };
38
39 /* Max number of MAC addresses that are parsed/processed per daughter card */
40 #define DAUGHTER_CARD_NO_OF_MAC_ADDR 8
41
42 /* Regiter that controls the SERDES0 lane and clock assignment */
43 #define CTRLMMR_SERDES0_CTRL 0x00104080
44 #define PCIE_LANE0 0x1
45
46 DECLARE_GLOBAL_DATA_PTR;
47
board_init(void)48 int board_init(void)
49 {
50 return 0;
51 }
52
dram_init(void)53 int dram_init(void)
54 {
55 #ifdef CONFIG_PHYS_64BIT
56 gd->ram_size = 0x100000000;
57 #else
58 gd->ram_size = 0x80000000;
59 #endif
60
61 return 0;
62 }
63
board_get_usable_ram_top(ulong total_size)64 ulong board_get_usable_ram_top(ulong total_size)
65 {
66 #ifdef CONFIG_PHYS_64BIT
67 /* Limit RAM used by U-Boot to the DDR low region */
68 if (gd->ram_top > 0x100000000)
69 return 0x100000000;
70 #endif
71
72 return gd->ram_top;
73 }
74
dram_init_banksize(void)75 int dram_init_banksize(void)
76 {
77 /* Bank 0 declares the memory available in the DDR low region */
78 gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
79 gd->bd->bi_dram[0].size = 0x80000000;
80 gd->ram_size = 0x80000000;
81
82 #ifdef CONFIG_PHYS_64BIT
83 /* Bank 1 declares the memory available in the DDR high region */
84 gd->bd->bi_dram[1].start = CONFIG_SYS_SDRAM_BASE1;
85 gd->bd->bi_dram[1].size = 0x80000000;
86 gd->ram_size = 0x100000000;
87 #endif
88
89 return 0;
90 }
91
92 #ifdef CONFIG_SPL_LOAD_FIT
board_fit_config_name_match(const char * name)93 int board_fit_config_name_match(const char *name)
94 {
95 #ifdef CONFIG_TARGET_AM654_A53_EVM
96 if (!strcmp(name, "k3-am654-base-board"))
97 return 0;
98 #endif
99
100 return -1;
101 }
102 #endif
103
104 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
ft_board_setup(void * blob,struct bd_info * bd)105 int ft_board_setup(void *blob, struct bd_info *bd)
106 {
107 int ret;
108
109 ret = fdt_fixup_msmc_ram(blob, "/bus@100000", "sram@70000000");
110 if (ret < 0)
111 ret = fdt_fixup_msmc_ram(blob, "/interconnect@100000",
112 "sram@70000000");
113 if (ret) {
114 printf("%s: fixing up msmc ram failed %d\n", __func__, ret);
115 return ret;
116 }
117
118 #if defined(CONFIG_TI_SECURE_DEVICE)
119 /* Make Crypto HW reserved for secure world use */
120 ret = fdt_disable_node(blob, "/bus@100000/crypto@4e00000");
121 if (ret < 0)
122 ret = fdt_disable_node(blob,
123 "/interconnect@100000/crypto@4E00000");
124 if (ret)
125 printf("%s: disabling SA2UL failed %d\n", __func__, ret);
126 #endif
127
128 return 0;
129 }
130 #endif
131
do_board_detect(void)132 int do_board_detect(void)
133 {
134 int ret;
135
136 ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
137 CONFIG_EEPROM_CHIP_ADDRESS);
138 if (ret)
139 pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
140 CONFIG_EEPROM_CHIP_ADDRESS, ret);
141
142 return ret;
143 }
144
checkboard(void)145 int checkboard(void)
146 {
147 struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
148
149 if (do_board_detect())
150 /* EEPROM not populated */
151 printf("Board: %s rev %s\n", "AM6-COMPROCEVM", "E3");
152 else
153 printf("Board: %s rev %s\n", ep->name, ep->version);
154
155 return 0;
156 }
157
setup_board_eeprom_env(void)158 static void setup_board_eeprom_env(void)
159 {
160 char *name = "am65x";
161
162 if (do_board_detect())
163 goto invalid_eeprom;
164
165 if (board_is_am65x_base_board())
166 name = "am65x";
167 else
168 printf("Unidentified board claims %s in eeprom header\n",
169 board_ti_get_name());
170
171 invalid_eeprom:
172 set_board_info_env_am6(name);
173 }
174
init_daughtercard_det_gpio(char * gpio_name,struct gpio_desc * desc)175 static int init_daughtercard_det_gpio(char *gpio_name, struct gpio_desc *desc)
176 {
177 int ret;
178
179 memset(desc, 0, sizeof(*desc));
180
181 ret = dm_gpio_lookup_name(gpio_name, desc);
182 if (ret < 0)
183 return ret;
184
185 /* Request GPIO, simply re-using the name as label */
186 ret = dm_gpio_request(desc, gpio_name);
187 if (ret < 0)
188 return ret;
189
190 return dm_gpio_set_dir_flags(desc, GPIOD_IS_IN);
191 }
192
probe_daughtercards(void)193 static int probe_daughtercards(void)
194 {
195 struct ti_am6_eeprom ep;
196 struct gpio_desc board_det_gpios[AM65X_EVM_BRD_DET_COUNT];
197 char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
198 u8 mac_addr_cnt;
199 char name_overlays[1024] = { 0 };
200 int i, j;
201 int ret;
202
203 /*
204 * Daughter card presence detection signal name to GPIO (via I2C I/O
205 * expander @ address 0x38) name and EEPROM I2C address mapping.
206 */
207 const struct {
208 char *gpio_name;
209 u8 i2c_addr;
210 } slot_map[AM65X_EVM_BRD_DET_COUNT] = {
211 { "gpio@38_0", 0x52, }, /* AM65X_EVM_APP_BRD_DET */
212 { "gpio@38_1", 0x55, }, /* AM65X_EVM_LCD_BRD_DET */
213 { "gpio@38_2", 0x54, }, /* AM65X_EVM_SERDES_BRD_DET */
214 { "gpio@38_3", 0x53, }, /* AM65X_EVM_HDMI_GPMC_BRD_DET */
215 };
216
217 /* Declaration of daughtercards to probe */
218 const struct {
219 u8 slot_index; /* Slot the card is installed */
220 char *card_name; /* EEPROM-programmed card name */
221 char *dtbo_name; /* Device tree overlay to apply */
222 u8 eth_offset; /* ethXaddr MAC address index offset */
223 } cards[] = {
224 {
225 AM65X_EVM_APP_BRD_DET,
226 "AM6-GPAPPEVM",
227 "k3-am654-gp.dtbo",
228 0,
229 },
230 {
231 AM65X_EVM_APP_BRD_DET,
232 "AM6-IDKAPPEVM",
233 "k3-am654-idk.dtbo",
234 3,
235 },
236 {
237 AM65X_EVM_SERDES_BRD_DET,
238 "SER-PCIE2LEVM",
239 "k3-am654-pcie-usb2.dtbo",
240 0,
241 },
242 {
243 AM65X_EVM_SERDES_BRD_DET,
244 "SER-PCIEUSBEVM",
245 "k3-am654-pcie-usb3.dtbo",
246 0,
247 },
248 {
249 AM65X_EVM_LCD_BRD_DET,
250 "OLDI-LCD1EVM",
251 "k3-am654-evm-oldi-lcd1evm.dtbo",
252 0,
253 },
254 };
255
256 /*
257 * Initialize GPIO used for daughtercard slot presence detection and
258 * keep the resulting handles in local array for easier access.
259 */
260 for (i = 0; i < AM65X_EVM_BRD_DET_COUNT; i++) {
261 ret = init_daughtercard_det_gpio(slot_map[i].gpio_name,
262 &board_det_gpios[i]);
263 if (ret < 0)
264 return ret;
265 }
266
267 for (i = 0; i < ARRAY_SIZE(cards); i++) {
268 /* Obtain card-specific slot index and associated I2C address */
269 u8 slot_index = cards[i].slot_index;
270 u8 i2c_addr = slot_map[slot_index].i2c_addr;
271
272 /*
273 * The presence detection signal is active-low, hence skip
274 * over this card slot if anything other than 0 is returned.
275 */
276 ret = dm_gpio_get_value(&board_det_gpios[slot_index]);
277 if (ret < 0)
278 return ret;
279 else if (ret)
280 continue;
281
282 /* Get and parse the daughter card EEPROM record */
283 ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS, i2c_addr,
284 &ep,
285 (char **)mac_addr,
286 DAUGHTER_CARD_NO_OF_MAC_ADDR,
287 &mac_addr_cnt);
288 if (ret) {
289 pr_err("Reading daughtercard EEPROM at 0x%02x failed %d\n",
290 i2c_addr, ret);
291 /*
292 * Even this is pretty serious let's just skip over
293 * this particular daughtercard, rather than ending
294 * the probing process altogether.
295 */
296 continue;
297 }
298
299 /* Only process the parsed data if we found a match */
300 if (strncmp(ep.name, cards[i].card_name, sizeof(ep.name)))
301 continue;
302
303 printf("Detected: %s rev %s\n", ep.name, ep.version);
304
305 /*
306 * Populate any MAC addresses from daughtercard into the U-Boot
307 * environment, starting with a card-specific offset so we can
308 * have multiple cards contribute to the MAC pool in a well-
309 * defined manner.
310 */
311 for (j = 0; j < mac_addr_cnt; j++) {
312 if (!is_valid_ethaddr((u8 *)mac_addr[j]))
313 continue;
314
315 eth_env_set_enetaddr_by_index("eth",
316 cards[i].eth_offset + j,
317 (uchar *)mac_addr[j]);
318 }
319
320 /*
321 * It has been observed that setting SERDES0 lane mux to USB prevents USB
322 * 2.0 operation on USB0. Setting SERDES0 lane mux to non-USB when USB0 is
323 * used in USB 2.0 only mode solves this issue. For USB3.0+2.0 operation
324 * this issue is not present.
325 *
326 * Implement this workaround by writing 1 to LANE_FUNC_SEL field in
327 * CTRLMMR_SERDES0_CTRL register.
328 */
329 if (!strncmp(ep.name, "SER-PCIE2LEVM", sizeof(ep.name)))
330 writel(PCIE_LANE0, CTRLMMR_SERDES0_CTRL);
331
332 /* Skip if no overlays are to be added */
333 if (!strlen(cards[i].dtbo_name))
334 continue;
335
336 /*
337 * Make sure we are not running out of buffer space by checking
338 * if we can fit the new overlay, a trailing space to be used
339 * as a separator, plus the terminating zero.
340 */
341 if (strlen(name_overlays) + strlen(cards[i].dtbo_name) + 2 >
342 sizeof(name_overlays))
343 return -ENOMEM;
344
345 /* Append to our list of overlays */
346 strcat(name_overlays, cards[i].dtbo_name);
347 strcat(name_overlays, " ");
348 }
349
350 /* Apply device tree overlay(s) to the U-Boot environment, if any */
351 if (strlen(name_overlays))
352 return env_set("name_overlays", name_overlays);
353
354 return 0;
355 }
356
board_late_init(void)357 int board_late_init(void)
358 {
359 struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
360
361 setup_board_eeprom_env();
362
363 /*
364 * The first MAC address for ethernet a.k.a. ethernet0 comes from
365 * efuse populated via the am654 gigabit eth switch subsystem driver.
366 * All the other ones are populated via EEPROM, hence continue with
367 * an index of 1.
368 */
369 board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt);
370
371 /* Check for and probe any plugged-in daughtercards */
372 probe_daughtercards();
373
374 return 0;
375 }
376