1 /*
2  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
3  *
4  * Based on da830evm.c. Original Copyrights follow:
5  *
6  * Copyright (C) 2009 Nick Thompson, GE Fanuc, Ltd. <nick.thompson@gefanuc.com>
7  * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
8  *
9  * SPDX-License-Identifier:	GPL-2.0+
10  */
11 
12 #include <common.h>
13 #include <i2c.h>
14 #include <net.h>
15 #include <netdev.h>
16 #include <spi.h>
17 #include <spi_flash.h>
18 #include <asm/arch/hardware.h>
19 #include <asm/ti-common/davinci_nand.h>
20 #include <asm/arch/emac_defs.h>
21 #include <asm/arch/pinmux_defs.h>
22 #include <asm/io.h>
23 #include <asm/arch/davinci_misc.h>
24 #include <linux/errno.h>
25 #include <hwconfig.h>
26 
27 #ifdef CONFIG_DAVINCI_MMC
28 #include <mmc.h>
29 #include <asm/arch/sdmmc_defs.h>
30 #endif
31 
32 DECLARE_GLOBAL_DATA_PTR;
33 
34 #ifdef CONFIG_DRIVER_TI_EMAC
35 #ifdef CONFIG_DRIVER_TI_EMAC_USE_RMII
36 #define HAS_RMII 1
37 #else
38 #define HAS_RMII 0
39 #endif
40 #endif /* CONFIG_DRIVER_TI_EMAC */
41 
42 #define CFG_MAC_ADDR_SPI_BUS	0
43 #define CFG_MAC_ADDR_SPI_CS	0
44 #define CFG_MAC_ADDR_SPI_MAX_HZ	CONFIG_SF_DEFAULT_SPEED
45 #define CFG_MAC_ADDR_SPI_MODE	SPI_MODE_3
46 
47 #define CFG_MAC_ADDR_OFFSET	(flash->size - SZ_64K)
48 
49 #ifdef CONFIG_MAC_ADDR_IN_SPIFLASH
50 static int get_mac_addr(u8 *addr)
51 {
52 	struct spi_flash *flash;
53 	int ret;
54 
55 	flash = spi_flash_probe(CFG_MAC_ADDR_SPI_BUS, CFG_MAC_ADDR_SPI_CS,
56 			CFG_MAC_ADDR_SPI_MAX_HZ, CFG_MAC_ADDR_SPI_MODE);
57 	if (!flash) {
58 		printf("Error - unable to probe SPI flash.\n");
59 		return -1;
60 	}
61 
62 	ret = spi_flash_read(flash, CFG_MAC_ADDR_OFFSET, 6, addr);
63 	if (ret) {
64 		printf("Error - unable to read MAC address from SPI flash.\n");
65 		return -1;
66 	}
67 
68 	return ret;
69 }
70 #endif
71 
72 void dsp_lpsc_on(unsigned domain, unsigned int id)
73 {
74 	dv_reg_p mdstat, mdctl, ptstat, ptcmd;
75 	struct davinci_psc_regs *psc_regs;
76 
77 	psc_regs = davinci_psc0_regs;
78 	mdstat = &psc_regs->psc0.mdstat[id];
79 	mdctl = &psc_regs->psc0.mdctl[id];
80 	ptstat = &psc_regs->ptstat;
81 	ptcmd = &psc_regs->ptcmd;
82 
83 	while (*ptstat & (0x1 << domain))
84 		;
85 
86 	if ((*mdstat & 0x1f) == 0x03)
87 		return;                 /* Already on and enabled */
88 
89 	*mdctl |= 0x03;
90 
91 	*ptcmd = 0x1 << domain;
92 
93 	while (*ptstat & (0x1 << domain))
94 		;
95 	while ((*mdstat & 0x1f) != 0x03)
96 		;		/* Probably an overkill... */
97 }
98 
99 static void dspwake(void)
100 {
101 	unsigned *resetvect = (unsigned *)DAVINCI_L3CBARAM_BASE;
102 	u32 val;
103 
104 	/* if the device is ARM only, return */
105 	if ((readl(CHIP_REV_ID_REG) & 0x3f) == 0x10)
106 		return;
107 
108 	if (hwconfig_subarg_cmp_f("dsp", "wake", "no", NULL))
109 		return;
110 
111 	*resetvect++ = 0x1E000; /* DSP Idle */
112 	/* clear out the next 10 words as NOP */
113 	memset(resetvect, 0, sizeof(unsigned) *10);
114 
115 	/* setup the DSP reset vector */
116 	writel(DAVINCI_L3CBARAM_BASE, HOST1CFG);
117 
118 	dsp_lpsc_on(1, DAVINCI_LPSC_GEM);
119 	val = readl(PSC0_MDCTL + (15 * 4));
120 	val |= 0x100;
121 	writel(val, (PSC0_MDCTL + (15 * 4)));
122 }
123 
124 int misc_init_r(void)
125 {
126 	dspwake();
127 
128 #if defined(CONFIG_MAC_ADDR_IN_SPIFLASH) || defined(CONFIG_MAC_ADDR_IN_EEPROM)
129 
130 	uchar env_enetaddr[6];
131 	int enetaddr_found;
132 
133 	enetaddr_found = eth_getenv_enetaddr("ethaddr", env_enetaddr);
134 
135 #ifdef CONFIG_MAC_ADDR_IN_SPIFLASH
136 	int spi_mac_read;
137 	uchar buff[6];
138 
139 	spi_mac_read = get_mac_addr(buff);
140 
141 	/*
142 	 * MAC address not present in the environment
143 	 * try and read the MAC address from SPI flash
144 	 * and set it.
145 	 */
146 	if (!enetaddr_found) {
147 		if (!spi_mac_read) {
148 			if (is_valid_ethaddr(buff)) {
149 				if (eth_setenv_enetaddr("ethaddr", buff)) {
150 					printf("Warning: Failed to "
151 					"set MAC address from SPI flash\n");
152 				}
153 			} else {
154 					printf("Warning: Invalid "
155 					"MAC address read from SPI flash\n");
156 			}
157 		}
158 	} else {
159 		/*
160 		 * MAC address present in environment compare it with
161 		 * the MAC address in SPI flash and warn on mismatch
162 		 */
163 		if (!spi_mac_read && is_valid_ethaddr(buff) &&
164 		    memcmp(env_enetaddr, buff, 6))
165 			printf("Warning: MAC address in SPI flash don't match "
166 					"with the MAC address in the environment\n");
167 		printf("Default using MAC address from environment\n");
168 	}
169 #endif
170 	uint8_t enetaddr[8];
171 	int eeprom_mac_read;
172 
173 	/* Read Ethernet MAC address from EEPROM */
174 	eeprom_mac_read = dvevm_read_mac_address(enetaddr);
175 
176 	/*
177 	 * MAC address not present in the environment
178 	 * try and read the MAC address from EEPROM flash
179 	 * and set it.
180 	 */
181 	if (!enetaddr_found) {
182 		if (eeprom_mac_read)
183 			/* Set Ethernet MAC address from EEPROM */
184 			davinci_sync_env_enetaddr(enetaddr);
185 	} else {
186 		/*
187 		 * MAC address present in environment compare it with
188 		 * the MAC address in EEPROM and warn on mismatch
189 		 */
190 		if (eeprom_mac_read && memcmp(enetaddr, env_enetaddr, 6))
191 			printf("Warning: MAC address in EEPROM don't match "
192 					"with the MAC address in the environment\n");
193 		printf("Default using MAC address from environment\n");
194 	}
195 
196 #endif
197 	return 0;
198 }
199 
200 #ifdef CONFIG_DAVINCI_MMC
201 static struct davinci_mmc mmc_sd0 = {
202 	.reg_base = (struct davinci_mmc_regs *)DAVINCI_MMC_SD0_BASE,
203 	.host_caps = MMC_MODE_4BIT,     /* DA850 supports only 4-bit SD/MMC */
204 	.voltages = MMC_VDD_32_33 | MMC_VDD_33_34,
205 	.version = MMC_CTLR_VERSION_2,
206 };
207 
208 int board_mmc_init(bd_t *bis)
209 {
210 	mmc_sd0.input_clk = clk_get(DAVINCI_MMCSD_CLKID);
211 
212 	/* Add slot-0 to mmc subsystem */
213 	return davinci_mmc_init(bis, &mmc_sd0);
214 }
215 #endif
216 
217 static const struct pinmux_config gpio_pins[] = {
218 #ifdef CONFIG_USE_NOR
219 	/* GP0[11] is required for NOR to work on Rev 3 EVMs */
220 	{ pinmux(0), 8, 4 },	/* GP0[11] */
221 #endif
222 #ifdef CONFIG_DAVINCI_MMC
223 	/* GP0[11] is required for SD to work on Rev 3 EVMs */
224 	{ pinmux(0),  8, 4 },	/* GP0[11] */
225 #endif
226 };
227 
228 const struct pinmux_resource pinmuxes[] = {
229 #ifdef CONFIG_DRIVER_TI_EMAC
230 	PINMUX_ITEM(emac_pins_mdio),
231 #ifdef CONFIG_DRIVER_TI_EMAC_USE_RMII
232 	PINMUX_ITEM(emac_pins_rmii),
233 #else
234 	PINMUX_ITEM(emac_pins_mii),
235 #endif
236 #endif
237 #ifdef CONFIG_SPI_FLASH
238 	PINMUX_ITEM(spi1_pins_base),
239 	PINMUX_ITEM(spi1_pins_scs0),
240 #endif
241 	PINMUX_ITEM(uart2_pins_txrx),
242 	PINMUX_ITEM(uart2_pins_rtscts),
243 	PINMUX_ITEM(i2c0_pins),
244 #ifdef CONFIG_NAND_DAVINCI
245 	PINMUX_ITEM(emifa_pins_cs3),
246 	PINMUX_ITEM(emifa_pins_cs4),
247 	PINMUX_ITEM(emifa_pins_nand),
248 #elif defined(CONFIG_USE_NOR)
249 	PINMUX_ITEM(emifa_pins_cs2),
250 	PINMUX_ITEM(emifa_pins_nor),
251 #endif
252 	PINMUX_ITEM(gpio_pins),
253 #ifdef CONFIG_DAVINCI_MMC
254 	PINMUX_ITEM(mmc0_pins),
255 #endif
256 };
257 
258 const int pinmuxes_size = ARRAY_SIZE(pinmuxes);
259 
260 const struct lpsc_resource lpsc[] = {
261 	{ DAVINCI_LPSC_AEMIF },	/* NAND, NOR */
262 	{ DAVINCI_LPSC_SPI1 },	/* Serial Flash */
263 	{ DAVINCI_LPSC_EMAC },	/* image download */
264 	{ DAVINCI_LPSC_UART2 },	/* console */
265 	{ DAVINCI_LPSC_GPIO },
266 #ifdef CONFIG_DAVINCI_MMC
267 	{ DAVINCI_LPSC_MMC_SD },
268 #endif
269 };
270 
271 const int lpsc_size = ARRAY_SIZE(lpsc);
272 
273 #ifndef CONFIG_DA850_EVM_MAX_CPU_CLK
274 #define CONFIG_DA850_EVM_MAX_CPU_CLK	300000000
275 #endif
276 
277 #define REV_AM18X_EVM		0x100
278 
279 /*
280  * get_board_rev() - setup to pass kernel board revision information
281  * Returns:
282  * bit[0-3]	Maximum cpu clock rate supported by onboard SoC
283  *		0000b - 300 MHz
284  *		0001b - 372 MHz
285  *		0010b - 408 MHz
286  *		0011b - 456 MHz
287  */
288 u32 get_board_rev(void)
289 {
290 	char *s;
291 	u32 maxcpuclk = CONFIG_DA850_EVM_MAX_CPU_CLK;
292 	u32 rev = 0;
293 
294 	s = getenv("maxcpuclk");
295 	if (s)
296 		maxcpuclk = simple_strtoul(s, NULL, 10);
297 
298 	if (maxcpuclk >= 456000000)
299 		rev = 3;
300 	else if (maxcpuclk >= 408000000)
301 		rev = 2;
302 	else if (maxcpuclk >= 372000000)
303 		rev = 1;
304 #ifdef CONFIG_DA850_AM18X_EVM
305 	rev |= REV_AM18X_EVM;
306 #endif
307 	return rev;
308 }
309 
310 int board_early_init_f(void)
311 {
312 	/*
313 	 * Power on required peripherals
314 	 * ARM does not have access by default to PSC0 and PSC1
315 	 * assuming here that the DSP bootloader has set the IOPU
316 	 * such that PSC access is available to ARM
317 	 */
318 	if (da8xx_configure_lpsc_items(lpsc, ARRAY_SIZE(lpsc)))
319 		return 1;
320 
321 	return 0;
322 }
323 
324 int board_init(void)
325 {
326 #ifndef CONFIG_USE_IRQ
327 	irq_init();
328 #endif
329 
330 #ifdef CONFIG_NAND_DAVINCI
331 	/*
332 	 * NAND CS setup - cycle counts based on da850evm NAND timings in the
333 	 * Linux kernel @ 25MHz EMIFA
334 	 */
335 	writel((DAVINCI_ABCR_WSETUP(2) |
336 		DAVINCI_ABCR_WSTROBE(2) |
337 		DAVINCI_ABCR_WHOLD(1) |
338 		DAVINCI_ABCR_RSETUP(1) |
339 		DAVINCI_ABCR_RSTROBE(4) |
340 		DAVINCI_ABCR_RHOLD(0) |
341 		DAVINCI_ABCR_TA(1) |
342 		DAVINCI_ABCR_ASIZE_8BIT),
343 	       &davinci_emif_regs->ab2cr); /* CS3 */
344 #endif
345 
346 	/* arch number of the board */
347 	gd->bd->bi_arch_number = MACH_TYPE_DAVINCI_DA850_EVM;
348 
349 	/* address of boot parameters */
350 	gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
351 
352 	/* setup the SUSPSRC for ARM to control emulation suspend */
353 	writel(readl(&davinci_syscfg_regs->suspsrc) &
354 	       ~(DAVINCI_SYSCFG_SUSPSRC_EMAC | DAVINCI_SYSCFG_SUSPSRC_I2C |
355 		 DAVINCI_SYSCFG_SUSPSRC_SPI1 | DAVINCI_SYSCFG_SUSPSRC_TIMER0 |
356 		 DAVINCI_SYSCFG_SUSPSRC_UART2),
357 	       &davinci_syscfg_regs->suspsrc);
358 
359 	/* configure pinmux settings */
360 	if (davinci_configure_pin_mux_items(pinmuxes, ARRAY_SIZE(pinmuxes)))
361 		return 1;
362 
363 #ifdef CONFIG_USE_NOR
364 	/* Set the GPIO direction as output */
365 	clrbits_le32((u32 *)GPIO_BANK0_REG_DIR_ADDR, (0x01 << 11));
366 
367 	/* Set the output as low */
368 	writel(0x01 << 11, GPIO_BANK0_REG_CLR_ADDR);
369 #endif
370 
371 #ifdef CONFIG_DAVINCI_MMC
372 	/* Set the GPIO direction as output */
373 	clrbits_le32((u32 *)GPIO_BANK0_REG_DIR_ADDR, (0x01 << 11));
374 
375 	/* Set the output as high */
376 	writel(0x01 << 11, GPIO_BANK0_REG_SET_ADDR);
377 #endif
378 
379 #ifdef CONFIG_DRIVER_TI_EMAC
380 	davinci_emac_mii_mode_sel(HAS_RMII);
381 #endif /* CONFIG_DRIVER_TI_EMAC */
382 
383 	/* enable the console UART */
384 	writel((DAVINCI_UART_PWREMU_MGMT_FREE | DAVINCI_UART_PWREMU_MGMT_URRST |
385 		DAVINCI_UART_PWREMU_MGMT_UTRST),
386 	       &davinci_uart2_ctrl_regs->pwremu_mgmt);
387 
388 	return 0;
389 }
390 
391 #ifdef CONFIG_DRIVER_TI_EMAC
392 
393 #ifdef CONFIG_DRIVER_TI_EMAC_USE_RMII
394 /**
395  * rmii_hw_init
396  *
397  * DA850/OMAP-L138 EVM can interface to a daughter card for
398  * additional features. This card has an I2C GPIO Expander TCA6416
399  * to select the required functions like camera, RMII Ethernet,
400  * character LCD, video.
401  *
402  * Initialization of the expander involves configuring the
403  * polarity and direction of the ports. P07-P05 are used here.
404  * These ports are connected to a Mux chip which enables only one
405  * functionality at a time.
406  *
407  * For RMII phy to respond, the MII MDIO clock has to be  disabled
408  * since both the PHY devices have address as zero. The MII MDIO
409  * clock is controlled via GPIO2[6].
410  *
411  * This code is valid for Beta version of the hardware
412  */
413 int rmii_hw_init(void)
414 {
415 	const struct pinmux_config gpio_pins[] = {
416 		{ pinmux(6), 8, 1 }
417 	};
418 	u_int8_t buf[2];
419 	unsigned int temp;
420 	int ret;
421 
422 	/* PinMux for GPIO */
423 	if (davinci_configure_pin_mux(gpio_pins, ARRAY_SIZE(gpio_pins)) != 0)
424 		return 1;
425 
426 	/* I2C Exapnder configuration */
427 	/* Set polarity to non-inverted */
428 	buf[0] = 0x0;
429 	buf[1] = 0x0;
430 	ret = i2c_write(CONFIG_SYS_I2C_EXPANDER_ADDR, 4, 1, buf, 2);
431 	if (ret) {
432 		printf("\nExpander @ 0x%02x write FAILED!!!\n",
433 				CONFIG_SYS_I2C_EXPANDER_ADDR);
434 		return ret;
435 	}
436 
437 	/* Configure P07-P05 as outputs */
438 	buf[0] = 0x1f;
439 	buf[1] = 0xff;
440 	ret = i2c_write(CONFIG_SYS_I2C_EXPANDER_ADDR, 6, 1, buf, 2);
441 	if (ret) {
442 		printf("\nExpander @ 0x%02x write FAILED!!!\n",
443 				CONFIG_SYS_I2C_EXPANDER_ADDR);
444 	}
445 
446 	/* For Ethernet RMII selection
447 	 * P07(SelA)=0
448 	 * P06(SelB)=1
449 	 * P05(SelC)=1
450 	 */
451 	if (i2c_read(CONFIG_SYS_I2C_EXPANDER_ADDR, 2, 1, buf, 1)) {
452 		printf("\nExpander @ 0x%02x read FAILED!!!\n",
453 				CONFIG_SYS_I2C_EXPANDER_ADDR);
454 	}
455 
456 	buf[0] &= 0x1f;
457 	buf[0] |= (0 << 7) | (1 << 6) | (1 << 5);
458 	if (i2c_write(CONFIG_SYS_I2C_EXPANDER_ADDR, 2, 1, buf, 1)) {
459 		printf("\nExpander @ 0x%02x write FAILED!!!\n",
460 				CONFIG_SYS_I2C_EXPANDER_ADDR);
461 	}
462 
463 	/* Set the output as high */
464 	temp = REG(GPIO_BANK2_REG_SET_ADDR);
465 	temp |= (0x01 << 6);
466 	REG(GPIO_BANK2_REG_SET_ADDR) = temp;
467 
468 	/* Set the GPIO direction as output */
469 	temp = REG(GPIO_BANK2_REG_DIR_ADDR);
470 	temp &= ~(0x01 << 6);
471 	REG(GPIO_BANK2_REG_DIR_ADDR) = temp;
472 
473 	return 0;
474 }
475 #endif /* CONFIG_DRIVER_TI_EMAC_USE_RMII */
476 
477 /*
478  * Initializes on-board ethernet controllers.
479  */
480 int board_eth_init(bd_t *bis)
481 {
482 #ifdef CONFIG_DRIVER_TI_EMAC_USE_RMII
483 	/* Select RMII fucntion through the expander */
484 	if (rmii_hw_init())
485 		printf("RMII hardware init failed!!!\n");
486 #endif
487 	if (!davinci_emac_initialize()) {
488 		printf("Error: Ethernet init failed!\n");
489 		return -1;
490 	}
491 
492 	return 0;
493 }
494 #endif /* CONFIG_DRIVER_TI_EMAC */
495