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/hardware.h>
17 #include <asm/global_data.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
24 #include "../common/board_detect.h"
25
26 #define board_is_am65x_base_board() board_ti_is("AM6-COMPROCEVM")
27
28 /* Daughter card presence detection signals */
29 enum {
30 AM65X_EVM_APP_BRD_DET,
31 AM65X_EVM_LCD_BRD_DET,
32 AM65X_EVM_SERDES_BRD_DET,
33 AM65X_EVM_HDMI_GPMC_BRD_DET,
34 AM65X_EVM_BRD_DET_COUNT,
35 };
36
37 /* Max number of MAC addresses that are parsed/processed per daughter card */
38 #define DAUGHTER_CARD_NO_OF_MAC_ADDR 8
39
40 /* Regiter that controls the SERDES0 lane and clock assignment */
41 #define CTRLMMR_SERDES0_CTRL 0x00104080
42 #define PCIE_LANE0 0x1
43
44 DECLARE_GLOBAL_DATA_PTR;
45
board_init(void)46 int board_init(void)
47 {
48 return 0;
49 }
50
dram_init(void)51 int dram_init(void)
52 {
53 #ifdef CONFIG_PHYS_64BIT
54 gd->ram_size = 0x100000000;
55 #else
56 gd->ram_size = 0x80000000;
57 #endif
58
59 return 0;
60 }
61
board_get_usable_ram_top(phys_size_t total_size)62 phys_size_t board_get_usable_ram_top(phys_size_t total_size)
63 {
64 #ifdef CONFIG_PHYS_64BIT
65 /* Limit RAM used by U-Boot to the DDR low region */
66 if (gd->ram_top > 0x100000000)
67 return 0x100000000;
68 #endif
69
70 return gd->ram_top;
71 }
72
dram_init_banksize(void)73 int dram_init_banksize(void)
74 {
75 /* Bank 0 declares the memory available in the DDR low region */
76 gd->bd->bi_dram[0].start = CFG_SYS_SDRAM_BASE;
77 gd->bd->bi_dram[0].size = 0x80000000;
78 gd->ram_size = 0x80000000;
79
80 #ifdef CONFIG_PHYS_64BIT
81 /* Bank 1 declares the memory available in the DDR high region */
82 gd->bd->bi_dram[1].start = CFG_SYS_SDRAM_BASE1;
83 gd->bd->bi_dram[1].size = 0x80000000;
84 gd->ram_size = 0x100000000;
85 #endif
86
87 return 0;
88 }
89
90 #ifdef CONFIG_SPL_LOAD_FIT
board_fit_config_name_match(const char * name)91 int board_fit_config_name_match(const char *name)
92 {
93 #ifdef CONFIG_TARGET_AM654_A53_EVM
94 if (!strcmp(name, "k3-am654-base-board"))
95 return 0;
96 #endif
97
98 return -1;
99 }
100 #endif
101
102 #ifdef CONFIG_TI_I2C_BOARD_DETECT
do_board_detect(void)103 int do_board_detect(void)
104 {
105 int ret;
106
107 ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
108 CONFIG_EEPROM_CHIP_ADDRESS);
109 if (ret)
110 pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
111 CONFIG_EEPROM_CHIP_ADDRESS, ret);
112
113 return ret;
114 }
115
checkboard(void)116 int checkboard(void)
117 {
118 struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
119
120 if (do_board_detect())
121 /* EEPROM not populated */
122 printf("Board: %s rev %s\n", "AM6-COMPROCEVM", "E3");
123 else
124 printf("Board: %s rev %s\n", ep->name, ep->version);
125
126 return 0;
127 }
128
setup_board_eeprom_env(void)129 static void setup_board_eeprom_env(void)
130 {
131 char *name = "am65x";
132
133 if (do_board_detect())
134 goto invalid_eeprom;
135
136 if (board_is_am65x_base_board())
137 name = "am65x";
138 else
139 printf("Unidentified board claims %s in eeprom header\n",
140 board_ti_get_name());
141
142 invalid_eeprom:
143 set_board_info_env_am6(name);
144 }
145
init_daughtercard_det_gpio(char * gpio_name,struct gpio_desc * desc)146 static int init_daughtercard_det_gpio(char *gpio_name, struct gpio_desc *desc)
147 {
148 int ret;
149
150 memset(desc, 0, sizeof(*desc));
151
152 ret = dm_gpio_lookup_name(gpio_name, desc);
153 if (ret < 0)
154 return ret;
155
156 /* Request GPIO, simply re-using the name as label */
157 ret = dm_gpio_request(desc, gpio_name);
158 if (ret < 0)
159 return ret;
160
161 return dm_gpio_set_dir_flags(desc, GPIOD_IS_IN);
162 }
163
probe_daughtercards(void)164 static int probe_daughtercards(void)
165 {
166 struct ti_am6_eeprom ep;
167 struct gpio_desc board_det_gpios[AM65X_EVM_BRD_DET_COUNT];
168 char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
169 u8 mac_addr_cnt;
170 char name_overlays[1024] = { 0 };
171 int i, j;
172 int ret;
173
174 /*
175 * Daughter card presence detection signal name to GPIO (via I2C I/O
176 * expander @ address 0x38) name and EEPROM I2C address mapping.
177 */
178 const struct {
179 char *gpio_name;
180 u8 i2c_addr;
181 } slot_map[AM65X_EVM_BRD_DET_COUNT] = {
182 { "gpio@38_0", 0x52, }, /* AM65X_EVM_APP_BRD_DET */
183 { "gpio@38_1", 0x55, }, /* AM65X_EVM_LCD_BRD_DET */
184 { "gpio@38_2", 0x54, }, /* AM65X_EVM_SERDES_BRD_DET */
185 { "gpio@38_3", 0x53, }, /* AM65X_EVM_HDMI_GPMC_BRD_DET */
186 };
187
188 /* Declaration of daughtercards to probe */
189 const struct {
190 u8 slot_index; /* Slot the card is installed */
191 char *card_name; /* EEPROM-programmed card name */
192 char *dtbo_name; /* Device tree overlay to apply */
193 u8 eth_offset; /* ethXaddr MAC address index offset */
194 } cards[] = {
195 {
196 AM65X_EVM_APP_BRD_DET,
197 "AM6-GPAPPEVM",
198 "k3-am654-gp.dtbo",
199 0,
200 },
201 {
202 AM65X_EVM_APP_BRD_DET,
203 "AM6-IDKAPPEVM",
204 "k3-am654-idk.dtbo",
205 3,
206 },
207 {
208 AM65X_EVM_SERDES_BRD_DET,
209 "SER-PCIE2LEVM",
210 "k3-am654-pcie-usb2.dtbo",
211 0,
212 },
213 {
214 AM65X_EVM_SERDES_BRD_DET,
215 "SER-PCIEUSBEVM",
216 "k3-am654-pcie-usb3.dtbo",
217 0,
218 },
219 {
220 AM65X_EVM_LCD_BRD_DET,
221 "OLDI-LCD1EVM",
222 "k3-am654-evm-oldi-lcd1evm.dtbo",
223 0,
224 },
225 };
226
227 /*
228 * Initialize GPIO used for daughtercard slot presence detection and
229 * keep the resulting handles in local array for easier access.
230 */
231 for (i = 0; i < AM65X_EVM_BRD_DET_COUNT; i++) {
232 ret = init_daughtercard_det_gpio(slot_map[i].gpio_name,
233 &board_det_gpios[i]);
234 if (ret < 0)
235 return ret;
236 }
237
238 for (i = 0; i < ARRAY_SIZE(cards); i++) {
239 /* Obtain card-specific slot index and associated I2C address */
240 u8 slot_index = cards[i].slot_index;
241 u8 i2c_addr = slot_map[slot_index].i2c_addr;
242
243 /*
244 * The presence detection signal is active-low, hence skip
245 * over this card slot if anything other than 0 is returned.
246 */
247 ret = dm_gpio_get_value(&board_det_gpios[slot_index]);
248 if (ret < 0)
249 return ret;
250 else if (ret)
251 continue;
252
253 /* Get and parse the daughter card EEPROM record */
254 ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS, i2c_addr,
255 &ep,
256 (char **)mac_addr,
257 DAUGHTER_CARD_NO_OF_MAC_ADDR,
258 &mac_addr_cnt);
259 if (ret) {
260 pr_err("Reading daughtercard EEPROM at 0x%02x failed %d\n",
261 i2c_addr, ret);
262 /*
263 * Even this is pretty serious let's just skip over
264 * this particular daughtercard, rather than ending
265 * the probing process altogether.
266 */
267 continue;
268 }
269
270 /* Only process the parsed data if we found a match */
271 if (strncmp(ep.name, cards[i].card_name, sizeof(ep.name)))
272 continue;
273
274 printf("Detected: %s rev %s\n", ep.name, ep.version);
275
276 /*
277 * Populate any MAC addresses from daughtercard into the U-Boot
278 * environment, starting with a card-specific offset so we can
279 * have multiple cards contribute to the MAC pool in a well-
280 * defined manner.
281 */
282 for (j = 0; j < mac_addr_cnt; j++) {
283 if (!is_valid_ethaddr((u8 *)mac_addr[j]))
284 continue;
285
286 eth_env_set_enetaddr_by_index("eth",
287 cards[i].eth_offset + j,
288 (uchar *)mac_addr[j]);
289 }
290
291 /*
292 * It has been observed that setting SERDES0 lane mux to USB prevents USB
293 * 2.0 operation on USB0. Setting SERDES0 lane mux to non-USB when USB0 is
294 * used in USB 2.0 only mode solves this issue. For USB3.0+2.0 operation
295 * this issue is not present.
296 *
297 * Implement this workaround by writing 1 to LANE_FUNC_SEL field in
298 * CTRLMMR_SERDES0_CTRL register.
299 */
300 if (!strncmp(ep.name, "SER-PCIE2LEVM", sizeof(ep.name)))
301 writel(PCIE_LANE0, CTRLMMR_SERDES0_CTRL);
302
303 /* Skip if no overlays are to be added */
304 if (!strlen(cards[i].dtbo_name))
305 continue;
306
307 /*
308 * Make sure we are not running out of buffer space by checking
309 * if we can fit the new overlay, a trailing space to be used
310 * as a separator, plus the terminating zero.
311 */
312 if (strlen(name_overlays) + strlen(cards[i].dtbo_name) + 2 >
313 sizeof(name_overlays))
314 return -ENOMEM;
315
316 /* Append to our list of overlays */
317 strcat(name_overlays, cards[i].dtbo_name);
318 strcat(name_overlays, " ");
319 }
320
321 /* Apply device tree overlay(s) to the U-Boot environment, if any */
322 if (strlen(name_overlays))
323 return env_set("name_overlays", name_overlays);
324
325 return 0;
326 }
327 #endif
328
board_late_init(void)329 int board_late_init(void)
330 {
331 if (IS_ENABLED(CONFIG_TI_I2C_BOARD_DETECT)) {
332 struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
333
334 setup_board_eeprom_env();
335
336 /*
337 * The first MAC address for ethernet a.k.a. ethernet0 comes from
338 * efuse populated via the am654 gigabit eth switch subsystem driver.
339 * All the other ones are populated via EEPROM, hence continue with
340 * an index of 1.
341 */
342 board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt);
343
344 /* Check for and probe any plugged-in daughtercards */
345 probe_daughtercards();
346 }
347
348 return 0;
349 }
350