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e363426e PK |
1 | /* |
2 | * board.c | |
3 | * | |
4 | * Board functions for TI AM335X based boards | |
5 | * | |
6 | * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/ | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation; either version 2 of | |
11 | * the License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | */ | |
18 | ||
19 | #include <common.h> | |
20 | #include <errno.h> | |
21 | #include <spl.h> | |
22 | #include <asm/arch/cpu.h> | |
23 | #include <asm/arch/hardware.h> | |
24 | #include <asm/arch/omap.h> | |
25 | #include <asm/arch/ddr_defs.h> | |
26 | #include <asm/arch/clock.h> | |
27 | #include <asm/arch/gpio.h> | |
28 | #include <asm/arch/mmc_host_def.h> | |
29 | #include <asm/arch/sys_proto.h> | |
30 | #include <asm/io.h> | |
31 | #include <asm/emif.h> | |
32 | #include <asm/gpio.h> | |
33 | #include <i2c.h> | |
34 | #include <miiphy.h> | |
35 | #include <cpsw.h> | |
36 | #include "board.h" | |
37 | ||
38 | DECLARE_GLOBAL_DATA_PTR; | |
39 | ||
40 | static struct wd_timer *wdtimer = (struct wd_timer *)WDT_BASE; | |
41 | #ifdef CONFIG_SPL_BUILD | |
42 | static struct uart_sys *uart_base = (struct uart_sys *)DEFAULT_UART_BASE; | |
43 | #endif | |
44 | ||
45 | /* MII mode defines */ | |
46 | #define MII_MODE_ENABLE 0x0 | |
cfd4ff6f | 47 | #define RGMII_MODE_ENABLE 0x3A |
e363426e PK |
48 | |
49 | /* GPIO that controls power to DDR on EVM-SK */ | |
50 | #define GPIO_DDR_VTT_EN 7 | |
51 | ||
52 | static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE; | |
53 | ||
54 | static struct am335x_baseboard_id __attribute__((section (".data"))) header; | |
55 | ||
56 | static inline int board_is_bone(void) | |
57 | { | |
58 | return !strncmp(header.name, "A335BONE", HDR_NAME_LEN); | |
59 | } | |
60 | ||
61 | static inline int board_is_bone_lt(void) | |
62 | { | |
63 | return !strncmp(header.name, "A335BNLT", HDR_NAME_LEN); | |
64 | } | |
65 | ||
66 | static inline int board_is_evm_sk(void) | |
67 | { | |
68 | return !strncmp("A335X_SK", header.name, HDR_NAME_LEN); | |
69 | } | |
70 | ||
a956bdcb MF |
71 | static inline int board_is_idk(void) |
72 | { | |
73 | return !strncmp(header.config, "SKU#02", 6); | |
74 | } | |
75 | ||
e363426e PK |
76 | /* |
77 | * Read header information from EEPROM into global structure. | |
78 | */ | |
79 | static int read_eeprom(void) | |
80 | { | |
81 | /* Check if baseboard eeprom is available */ | |
82 | if (i2c_probe(CONFIG_SYS_I2C_EEPROM_ADDR)) { | |
83 | puts("Could not probe the EEPROM; something fundamentally " | |
84 | "wrong on the I2C bus.\n"); | |
85 | return -ENODEV; | |
86 | } | |
87 | ||
88 | /* read the eeprom using i2c */ | |
89 | if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, 2, (uchar *)&header, | |
90 | sizeof(header))) { | |
91 | puts("Could not read the EEPROM; something fundamentally" | |
92 | " wrong on the I2C bus.\n"); | |
93 | return -EIO; | |
94 | } | |
95 | ||
96 | if (header.magic != 0xEE3355AA) { | |
97 | /* | |
98 | * read the eeprom using i2c again, | |
99 | * but use only a 1 byte address | |
100 | */ | |
101 | if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, 1, | |
102 | (uchar *)&header, sizeof(header))) { | |
103 | puts("Could not read the EEPROM; something " | |
104 | "fundamentally wrong on the I2C bus.\n"); | |
105 | return -EIO; | |
106 | } | |
107 | ||
108 | if (header.magic != 0xEE3355AA) { | |
109 | printf("Incorrect magic number (0x%x) in EEPROM\n", | |
110 | header.magic); | |
111 | return -EINVAL; | |
112 | } | |
113 | } | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
118 | /* UART Defines */ | |
119 | #ifdef CONFIG_SPL_BUILD | |
120 | #define UART_RESET (0x1 << 1) | |
121 | #define UART_CLK_RUNNING_MASK 0x1 | |
122 | #define UART_SMART_IDLE_EN (0x1 << 0x3) | |
123 | ||
124 | static void rtc32k_enable(void) | |
125 | { | |
126 | struct rtc_regs *rtc = (struct rtc_regs *)AM335X_RTC_BASE; | |
127 | ||
128 | /* | |
129 | * Unlock the RTC's registers. For more details please see the | |
130 | * RTC_SS section of the TRM. In order to unlock we need to | |
131 | * write these specific values (keys) in this order. | |
132 | */ | |
133 | writel(0x83e70b13, &rtc->kick0r); | |
134 | writel(0x95a4f1e0, &rtc->kick1r); | |
135 | ||
136 | /* Enable the RTC 32K OSC by setting bits 3 and 6. */ | |
137 | writel((1 << 3) | (1 << 6), &rtc->osc); | |
138 | } | |
e363426e | 139 | |
c00f69db | 140 | static const struct ddr_data ddr2_data = { |
c7d35bef PK |
141 | .datardsratio0 = ((MT47H128M16RT25E_RD_DQS<<30) | |
142 | (MT47H128M16RT25E_RD_DQS<<20) | | |
143 | (MT47H128M16RT25E_RD_DQS<<10) | | |
144 | (MT47H128M16RT25E_RD_DQS<<0)), | |
145 | .datawdsratio0 = ((MT47H128M16RT25E_WR_DQS<<30) | | |
146 | (MT47H128M16RT25E_WR_DQS<<20) | | |
147 | (MT47H128M16RT25E_WR_DQS<<10) | | |
148 | (MT47H128M16RT25E_WR_DQS<<0)), | |
149 | .datawiratio0 = ((MT47H128M16RT25E_PHY_WRLVL<<30) | | |
150 | (MT47H128M16RT25E_PHY_WRLVL<<20) | | |
151 | (MT47H128M16RT25E_PHY_WRLVL<<10) | | |
152 | (MT47H128M16RT25E_PHY_WRLVL<<0)), | |
153 | .datagiratio0 = ((MT47H128M16RT25E_PHY_GATELVL<<30) | | |
154 | (MT47H128M16RT25E_PHY_GATELVL<<20) | | |
155 | (MT47H128M16RT25E_PHY_GATELVL<<10) | | |
156 | (MT47H128M16RT25E_PHY_GATELVL<<0)), | |
157 | .datafwsratio0 = ((MT47H128M16RT25E_PHY_FIFO_WE<<30) | | |
158 | (MT47H128M16RT25E_PHY_FIFO_WE<<20) | | |
159 | (MT47H128M16RT25E_PHY_FIFO_WE<<10) | | |
160 | (MT47H128M16RT25E_PHY_FIFO_WE<<0)), | |
161 | .datawrsratio0 = ((MT47H128M16RT25E_PHY_WR_DATA<<30) | | |
162 | (MT47H128M16RT25E_PHY_WR_DATA<<20) | | |
163 | (MT47H128M16RT25E_PHY_WR_DATA<<10) | | |
164 | (MT47H128M16RT25E_PHY_WR_DATA<<0)), | |
165 | .datauserank0delay = MT47H128M16RT25E_PHY_RANK0_DELAY, | |
c00f69db PK |
166 | .datadldiff0 = PHY_DLL_LOCK_DIFF, |
167 | }; | |
e363426e | 168 | |
c00f69db | 169 | static const struct cmd_control ddr2_cmd_ctrl_data = { |
c7d35bef PK |
170 | .cmd0csratio = MT47H128M16RT25E_RATIO, |
171 | .cmd0dldiff = MT47H128M16RT25E_DLL_LOCK_DIFF, | |
172 | .cmd0iclkout = MT47H128M16RT25E_INVERT_CLKOUT, | |
c00f69db | 173 | |
c7d35bef PK |
174 | .cmd1csratio = MT47H128M16RT25E_RATIO, |
175 | .cmd1dldiff = MT47H128M16RT25E_DLL_LOCK_DIFF, | |
176 | .cmd1iclkout = MT47H128M16RT25E_INVERT_CLKOUT, | |
c00f69db | 177 | |
c7d35bef PK |
178 | .cmd2csratio = MT47H128M16RT25E_RATIO, |
179 | .cmd2dldiff = MT47H128M16RT25E_DLL_LOCK_DIFF, | |
180 | .cmd2iclkout = MT47H128M16RT25E_INVERT_CLKOUT, | |
c00f69db PK |
181 | }; |
182 | ||
183 | static const struct emif_regs ddr2_emif_reg_data = { | |
c7d35bef PK |
184 | .sdram_config = MT47H128M16RT25E_EMIF_SDCFG, |
185 | .ref_ctrl = MT47H128M16RT25E_EMIF_SDREF, | |
186 | .sdram_tim1 = MT47H128M16RT25E_EMIF_TIM1, | |
187 | .sdram_tim2 = MT47H128M16RT25E_EMIF_TIM2, | |
188 | .sdram_tim3 = MT47H128M16RT25E_EMIF_TIM3, | |
189 | .emif_ddr_phy_ctlr_1 = MT47H128M16RT25E_EMIF_READ_LATENCY, | |
c00f69db PK |
190 | }; |
191 | ||
192 | static const struct ddr_data ddr3_data = { | |
c7d35bef PK |
193 | .datardsratio0 = MT41J128MJT125_RD_DQS, |
194 | .datawdsratio0 = MT41J128MJT125_WR_DQS, | |
195 | .datafwsratio0 = MT41J128MJT125_PHY_FIFO_WE, | |
196 | .datawrsratio0 = MT41J128MJT125_PHY_WR_DATA, | |
c00f69db PK |
197 | .datadldiff0 = PHY_DLL_LOCK_DIFF, |
198 | }; | |
199 | ||
200 | static const struct cmd_control ddr3_cmd_ctrl_data = { | |
c7d35bef PK |
201 | .cmd0csratio = MT41J128MJT125_RATIO, |
202 | .cmd0dldiff = MT41J128MJT125_DLL_LOCK_DIFF, | |
203 | .cmd0iclkout = MT41J128MJT125_INVERT_CLKOUT, | |
c00f69db | 204 | |
c7d35bef PK |
205 | .cmd1csratio = MT41J128MJT125_RATIO, |
206 | .cmd1dldiff = MT41J128MJT125_DLL_LOCK_DIFF, | |
207 | .cmd1iclkout = MT41J128MJT125_INVERT_CLKOUT, | |
c00f69db | 208 | |
c7d35bef PK |
209 | .cmd2csratio = MT41J128MJT125_RATIO, |
210 | .cmd2dldiff = MT41J128MJT125_DLL_LOCK_DIFF, | |
211 | .cmd2iclkout = MT41J128MJT125_INVERT_CLKOUT, | |
c00f69db PK |
212 | }; |
213 | ||
214 | static struct emif_regs ddr3_emif_reg_data = { | |
c7d35bef PK |
215 | .sdram_config = MT41J128MJT125_EMIF_SDCFG, |
216 | .ref_ctrl = MT41J128MJT125_EMIF_SDREF, | |
217 | .sdram_tim1 = MT41J128MJT125_EMIF_TIM1, | |
218 | .sdram_tim2 = MT41J128MJT125_EMIF_TIM2, | |
219 | .sdram_tim3 = MT41J128MJT125_EMIF_TIM3, | |
220 | .zq_config = MT41J128MJT125_ZQ_CFG, | |
221 | .emif_ddr_phy_ctlr_1 = MT41J128MJT125_EMIF_READ_LATENCY, | |
c00f69db PK |
222 | }; |
223 | #endif | |
e363426e PK |
224 | |
225 | /* | |
226 | * early system init of muxing and clocks. | |
227 | */ | |
228 | void s_init(void) | |
229 | { | |
230 | /* WDT1 is already running when the bootloader gets control | |
231 | * Disable it to avoid "random" resets | |
232 | */ | |
233 | writel(0xAAAA, &wdtimer->wdtwspr); | |
234 | while (readl(&wdtimer->wdtwwps) != 0x0) | |
235 | ; | |
236 | writel(0x5555, &wdtimer->wdtwspr); | |
237 | while (readl(&wdtimer->wdtwwps) != 0x0) | |
238 | ; | |
239 | ||
240 | #ifdef CONFIG_SPL_BUILD | |
241 | /* Setup the PLLs and the clocks for the peripherals */ | |
242 | pll_init(); | |
243 | ||
244 | /* Enable RTC32K clock */ | |
245 | rtc32k_enable(); | |
246 | ||
247 | /* UART softreset */ | |
248 | u32 regVal; | |
249 | ||
6422b70b | 250 | #ifdef CONFIG_SERIAL1 |
e363426e | 251 | enable_uart0_pin_mux(); |
6422b70b AB |
252 | #endif /* CONFIG_SERIAL1 */ |
253 | #ifdef CONFIG_SERIAL2 | |
254 | enable_uart1_pin_mux(); | |
255 | #endif /* CONFIG_SERIAL2 */ | |
256 | #ifdef CONFIG_SERIAL3 | |
257 | enable_uart2_pin_mux(); | |
258 | #endif /* CONFIG_SERIAL3 */ | |
259 | #ifdef CONFIG_SERIAL4 | |
260 | enable_uart3_pin_mux(); | |
261 | #endif /* CONFIG_SERIAL4 */ | |
262 | #ifdef CONFIG_SERIAL5 | |
263 | enable_uart4_pin_mux(); | |
264 | #endif /* CONFIG_SERIAL5 */ | |
265 | #ifdef CONFIG_SERIAL6 | |
266 | enable_uart5_pin_mux(); | |
267 | #endif /* CONFIG_SERIAL6 */ | |
e363426e PK |
268 | |
269 | regVal = readl(&uart_base->uartsyscfg); | |
270 | regVal |= UART_RESET; | |
271 | writel(regVal, &uart_base->uartsyscfg); | |
272 | while ((readl(&uart_base->uartsyssts) & | |
273 | UART_CLK_RUNNING_MASK) != UART_CLK_RUNNING_MASK) | |
274 | ; | |
275 | ||
276 | /* Disable smart idle */ | |
277 | regVal = readl(&uart_base->uartsyscfg); | |
278 | regVal |= UART_SMART_IDLE_EN; | |
279 | writel(regVal, &uart_base->uartsyscfg); | |
280 | ||
281 | gd = &gdata; | |
282 | ||
283 | preloader_console_init(); | |
284 | ||
285 | /* Initalize the board header */ | |
286 | enable_i2c0_pin_mux(); | |
287 | i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); | |
288 | if (read_eeprom() < 0) | |
289 | puts("Could not get board ID.\n"); | |
290 | ||
291 | enable_board_pin_mux(&header); | |
292 | if (board_is_evm_sk()) { | |
293 | /* | |
294 | * EVM SK 1.2A and later use gpio0_7 to enable DDR3. | |
295 | * This is safe enough to do on older revs. | |
296 | */ | |
297 | gpio_request(GPIO_DDR_VTT_EN, "ddr_vtt_en"); | |
298 | gpio_direction_output(GPIO_DDR_VTT_EN, 1); | |
299 | } | |
300 | ||
c00f69db | 301 | if (board_is_evm_sk() || board_is_bone_lt()) |
c7d35bef | 302 | config_ddr(303, MT41J128MJT125_IOCTRL_VALUE, &ddr3_data, |
c00f69db PK |
303 | &ddr3_cmd_ctrl_data, &ddr3_emif_reg_data); |
304 | else | |
c7d35bef | 305 | config_ddr(266, MT47H128M16RT25E_IOCTRL_VALUE, &ddr2_data, |
c00f69db | 306 | &ddr2_cmd_ctrl_data, &ddr2_emif_reg_data); |
e363426e PK |
307 | #endif |
308 | } | |
309 | ||
310 | /* | |
311 | * Basic board specific setup. Pinmux has been handled already. | |
312 | */ | |
313 | int board_init(void) | |
314 | { | |
315 | i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); | |
316 | if (read_eeprom() < 0) | |
317 | puts("Could not get board ID.\n"); | |
318 | ||
319 | gd->bd->bi_boot_params = PHYS_DRAM_1 + 0x100; | |
320 | ||
98b5c269 IY |
321 | gpmc_init(); |
322 | ||
e363426e PK |
323 | return 0; |
324 | } | |
325 | ||
044fc14b TR |
326 | #ifdef CONFIG_BOARD_LATE_INIT |
327 | int board_late_init(void) | |
328 | { | |
329 | #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG | |
330 | char safe_string[HDR_NAME_LEN + 1]; | |
331 | ||
332 | /* Now set variables based on the header. */ | |
333 | strncpy(safe_string, (char *)header.name, sizeof(header.name)); | |
334 | safe_string[sizeof(header.name)] = 0; | |
335 | setenv("board_name", safe_string); | |
336 | ||
337 | strncpy(safe_string, (char *)header.version, sizeof(header.version)); | |
338 | safe_string[sizeof(header.version)] = 0; | |
339 | setenv("board_rev", safe_string); | |
340 | #endif | |
341 | ||
342 | return 0; | |
343 | } | |
344 | #endif | |
345 | ||
e363426e PK |
346 | #ifdef CONFIG_DRIVER_TI_CPSW |
347 | static void cpsw_control(int enabled) | |
348 | { | |
349 | /* VTP can be added here */ | |
350 | ||
351 | return; | |
352 | } | |
353 | ||
354 | static struct cpsw_slave_data cpsw_slaves[] = { | |
355 | { | |
356 | .slave_reg_ofs = 0x208, | |
357 | .sliver_reg_ofs = 0xd80, | |
358 | .phy_id = 0, | |
359 | }, | |
360 | { | |
361 | .slave_reg_ofs = 0x308, | |
362 | .sliver_reg_ofs = 0xdc0, | |
363 | .phy_id = 1, | |
364 | }, | |
365 | }; | |
366 | ||
367 | static struct cpsw_platform_data cpsw_data = { | |
368 | .mdio_base = AM335X_CPSW_MDIO_BASE, | |
369 | .cpsw_base = AM335X_CPSW_BASE, | |
370 | .mdio_div = 0xff, | |
371 | .channels = 8, | |
372 | .cpdma_reg_ofs = 0x800, | |
373 | .slaves = 1, | |
374 | .slave_data = cpsw_slaves, | |
375 | .ale_reg_ofs = 0xd00, | |
376 | .ale_entries = 1024, | |
377 | .host_port_reg_ofs = 0x108, | |
378 | .hw_stats_reg_ofs = 0x900, | |
379 | .mac_control = (1 << 5), | |
380 | .control = cpsw_control, | |
381 | .host_port_num = 0, | |
382 | .version = CPSW_CTRL_VERSION_2, | |
383 | }; | |
d2aa1154 | 384 | #endif |
e363426e | 385 | |
d2aa1154 IY |
386 | #if defined(CONFIG_DRIVER_TI_CPSW) || \ |
387 | (defined(CONFIG_USB_ETHER) && defined(CONFIG_MUSB_GADGET)) | |
e363426e PK |
388 | int board_eth_init(bd_t *bis) |
389 | { | |
d2aa1154 IY |
390 | int rv, n = 0; |
391 | #ifdef CONFIG_DRIVER_TI_CPSW | |
e363426e PK |
392 | uint8_t mac_addr[6]; |
393 | uint32_t mac_hi, mac_lo; | |
394 | ||
395 | if (!eth_getenv_enetaddr("ethaddr", mac_addr)) { | |
3ec36b34 | 396 | printf("<ethaddr> not set. Reading from E-fuse\n"); |
e363426e PK |
397 | /* try reading mac address from efuse */ |
398 | mac_lo = readl(&cdev->macid0l); | |
399 | mac_hi = readl(&cdev->macid0h); | |
400 | mac_addr[0] = mac_hi & 0xFF; | |
401 | mac_addr[1] = (mac_hi & 0xFF00) >> 8; | |
402 | mac_addr[2] = (mac_hi & 0xFF0000) >> 16; | |
403 | mac_addr[3] = (mac_hi & 0xFF000000) >> 24; | |
404 | mac_addr[4] = mac_lo & 0xFF; | |
405 | mac_addr[5] = (mac_lo & 0xFF00) >> 8; | |
406 | ||
407 | if (is_valid_ether_addr(mac_addr)) | |
408 | eth_setenv_enetaddr("ethaddr", mac_addr); | |
409 | else | |
d2aa1154 | 410 | goto try_usbether; |
e363426e PK |
411 | } |
412 | ||
a956bdcb | 413 | if (board_is_bone() || board_is_bone_lt() || board_is_idk()) { |
e363426e PK |
414 | writel(MII_MODE_ENABLE, &cdev->miisel); |
415 | cpsw_slaves[0].phy_if = cpsw_slaves[1].phy_if = | |
416 | PHY_INTERFACE_MODE_MII; | |
417 | } else { | |
418 | writel(RGMII_MODE_ENABLE, &cdev->miisel); | |
419 | cpsw_slaves[0].phy_if = cpsw_slaves[1].phy_if = | |
420 | PHY_INTERFACE_MODE_RGMII; | |
421 | } | |
422 | ||
d2aa1154 IY |
423 | rv = cpsw_register(&cpsw_data); |
424 | if (rv < 0) | |
425 | printf("Error %d registering CPSW switch\n", rv); | |
426 | else | |
427 | n += rv; | |
428 | #endif | |
429 | try_usbether: | |
430 | #if defined(CONFIG_USB_ETHER) && !defined(CONFIG_SPL_BUILD) | |
431 | rv = usb_eth_initialize(bis); | |
432 | if (rv < 0) | |
433 | printf("Error %d registering USB_ETHER\n", rv); | |
434 | else | |
435 | n += rv; | |
436 | #endif | |
437 | return n; | |
e363426e PK |
438 | } |
439 | #endif |