1 /*
2  * Novena SPL
3  *
4  * Copyright (C) 2014 Marek Vasut <marex@denx.de>
5  *
6  * SPDX-License-Identifier:     GPL-2.0+
7  */
8 
9 #include <common.h>
10 #include <asm/io.h>
11 #include <asm/arch/clock.h>
12 #include <asm/arch/iomux.h>
13 #include <asm/arch/mx6-ddr.h>
14 #include <asm/arch/mx6-pins.h>
15 #include <asm/arch/sys_proto.h>
16 #include <asm/gpio.h>
17 #include <asm/imx-common/boot_mode.h>
18 #include <asm/imx-common/iomux-v3.h>
19 #include <asm/imx-common/mxc_i2c.h>
20 #include <asm/arch/crm_regs.h>
21 #include <i2c.h>
22 #include <mmc.h>
23 #include <fsl_esdhc.h>
24 #include <spl.h>
25 
26 #include <asm/arch/mx6-ddr.h>
27 
28 #include "novena.h"
29 
30 DECLARE_GLOBAL_DATA_PTR;
31 
32 #define UART_PAD_CTRL						\
33 	(PAD_CTL_PKE | PAD_CTL_PUE |				\
34 	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |		\
35 	PAD_CTL_DSE_40ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
36 
37 #define USDHC_PAD_CTRL						\
38 	(PAD_CTL_PKE | PAD_CTL_PUE |				\
39 	PAD_CTL_PUS_47K_UP  | PAD_CTL_SPEED_LOW |		\
40 	PAD_CTL_DSE_80ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
41 
42 #define ENET_PAD_CTRL						\
43 	(PAD_CTL_PKE | PAD_CTL_PUE |				\
44 	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED	  |		\
45 	PAD_CTL_DSE_40ohm   | PAD_CTL_HYS)
46 
47 #define ENET_PHY_CFG_PAD_CTRL					\
48 	(PAD_CTL_PKE | PAD_CTL_PUE |				\
49 	PAD_CTL_PUS_22K_UP | PAD_CTL_HYS)
50 
51 #define RGMII_PAD_CTRL						\
52 	(PAD_CTL_PKE | PAD_CTL_PUE |				\
53 	PAD_CTL_PUS_100K_UP | PAD_CTL_DSE_40ohm | PAD_CTL_HYS)
54 
55 #define SPI_PAD_CTRL						\
56 	(PAD_CTL_HYS |						\
57 	PAD_CTL_PUS_100K_DOWN | PAD_CTL_SPEED_MED |		\
58 	PAD_CTL_DSE_40ohm     | PAD_CTL_SRE_FAST)
59 
60 #define I2C_PAD_CTRL						\
61 	(PAD_CTL_PKE | PAD_CTL_PUE |				\
62 	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_LOW |		\
63 	PAD_CTL_DSE_240ohm  | PAD_CTL_HYS |			\
64 	PAD_CTL_ODE)
65 
66 #define BUTTON_PAD_CTRL						\
67 	(PAD_CTL_PKE | PAD_CTL_PUE |				\
68 	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED   |		\
69 	PAD_CTL_DSE_40ohm   | PAD_CTL_HYS)
70 
71 #define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
72 
73 /*
74  * Audio
75  */
76 static iomux_v3_cfg_t audio_pads[] = {
77 	/* AUD_PWRON */
78 	MX6_PAD_DISP0_DAT23__GPIO5_IO17 | MUX_PAD_CTRL(NO_PAD_CTRL),
79 };
80 
81 static void novena_spl_setup_iomux_audio(void)
82 {
83 	imx_iomux_v3_setup_multiple_pads(audio_pads, ARRAY_SIZE(audio_pads));
84 	gpio_direction_output(NOVENA_AUDIO_PWRON, 1);
85 }
86 
87 /*
88  * ENET
89  */
90 static iomux_v3_cfg_t enet_pads1[] = {
91 	MX6_PAD_ENET_MDIO__ENET_MDIO		| MUX_PAD_CTRL(ENET_PAD_CTRL),
92 	MX6_PAD_ENET_MDC__ENET_MDC		| MUX_PAD_CTRL(ENET_PAD_CTRL),
93 	MX6_PAD_RGMII_TXC__RGMII_TXC		| MUX_PAD_CTRL(RGMII_PAD_CTRL),
94 	MX6_PAD_RGMII_TD0__RGMII_TD0		| MUX_PAD_CTRL(RGMII_PAD_CTRL),
95 	MX6_PAD_RGMII_TD1__RGMII_TD1		| MUX_PAD_CTRL(RGMII_PAD_CTRL),
96 	MX6_PAD_RGMII_TD2__RGMII_TD2		| MUX_PAD_CTRL(RGMII_PAD_CTRL),
97 	MX6_PAD_RGMII_TD3__RGMII_TD3		| MUX_PAD_CTRL(RGMII_PAD_CTRL),
98 	MX6_PAD_RGMII_TX_CTL__RGMII_TX_CTL	| MUX_PAD_CTRL(RGMII_PAD_CTRL),
99 	MX6_PAD_ENET_REF_CLK__ENET_TX_CLK	| MUX_PAD_CTRL(ENET_PAD_CTRL),
100 
101 	/* pin 35, PHY_AD2 */
102 	MX6_PAD_RGMII_RXC__GPIO6_IO30	| MUX_PAD_CTRL(ENET_PHY_CFG_PAD_CTRL),
103 	/* pin 32, MODE0 */
104 	MX6_PAD_RGMII_RD0__GPIO6_IO25	| MUX_PAD_CTRL(ENET_PHY_CFG_PAD_CTRL),
105 	/* pin 31, MODE1 */
106 	MX6_PAD_RGMII_RD1__GPIO6_IO27	| MUX_PAD_CTRL(ENET_PHY_CFG_PAD_CTRL),
107 	/* pin 28, MODE2 */
108 	MX6_PAD_RGMII_RD2__GPIO6_IO28	| MUX_PAD_CTRL(ENET_PHY_CFG_PAD_CTRL),
109 	/* pin 27, MODE3 */
110 	MX6_PAD_RGMII_RD3__GPIO6_IO29	| MUX_PAD_CTRL(ENET_PHY_CFG_PAD_CTRL),
111 	/* pin 33, CLK125_EN */
112 	MX6_PAD_RGMII_RX_CTL__GPIO6_IO24 | MUX_PAD_CTRL(ENET_PHY_CFG_PAD_CTRL),
113 
114 	/* pin 42 PHY nRST */
115 	MX6_PAD_EIM_D23__GPIO3_IO23		| MUX_PAD_CTRL(NO_PAD_CTRL),
116 };
117 
118 static iomux_v3_cfg_t enet_pads2[] = {
119 	MX6_PAD_RGMII_RXC__RGMII_RXC		| MUX_PAD_CTRL(RGMII_PAD_CTRL),
120 	MX6_PAD_RGMII_RD0__RGMII_RD0		| MUX_PAD_CTRL(RGMII_PAD_CTRL),
121 	MX6_PAD_RGMII_RD1__RGMII_RD1		| MUX_PAD_CTRL(RGMII_PAD_CTRL),
122 	MX6_PAD_RGMII_RD2__RGMII_RD2		| MUX_PAD_CTRL(RGMII_PAD_CTRL),
123 	MX6_PAD_RGMII_RD3__RGMII_RD3		| MUX_PAD_CTRL(RGMII_PAD_CTRL),
124 	MX6_PAD_RGMII_RX_CTL__RGMII_RX_CTL	| MUX_PAD_CTRL(RGMII_PAD_CTRL),
125 };
126 
127 static void novena_spl_setup_iomux_enet(void)
128 {
129 	imx_iomux_v3_setup_multiple_pads(enet_pads1, ARRAY_SIZE(enet_pads1));
130 
131 	/* Assert Ethernet PHY nRST */
132 	gpio_direction_output(IMX_GPIO_NR(3, 23), 0);
133 
134 	/*
135 	 * Use imx6 internal pull-ups to drive PHY mode pins during PHY reset
136 	 * de-assertion. The intention is to use weak signal drivers (pull-ups)
137 	 * to prevent the conflict between PHY pins becoming outputs after
138 	 * reset and imx6 still driving the pins. The issue is described in PHY
139 	 * datasheet, p.14
140 	 */
141 	gpio_direction_input(IMX_GPIO_NR(6, 30)); /* PHY_AD2 = 1 */
142 	gpio_direction_input(IMX_GPIO_NR(6, 25)); /* MODE0 = 1 */
143 	gpio_direction_input(IMX_GPIO_NR(6, 27)); /* MODE1 = 1 */
144 	gpio_direction_input(IMX_GPIO_NR(6, 28)); /* MODE2 = 1 */
145 	gpio_direction_input(IMX_GPIO_NR(6, 29)); /* MODE3 = 1 */
146 	gpio_direction_input(IMX_GPIO_NR(6, 24)); /* CLK125_EN = 1 */
147 
148 	/* Following reset timing (p.53, fig.8 from the PHY datasheet) */
149 	mdelay(10);
150 
151 	/* De-assert Ethernet PHY nRST */
152 	gpio_set_value(IMX_GPIO_NR(3, 23), 1);
153 
154 	/* PHY is now configured, connect FEC to the pads */
155 	imx_iomux_v3_setup_multiple_pads(enet_pads2, ARRAY_SIZE(enet_pads2));
156 
157 	/*
158 	 * PHY datasheet recommends on p.53 to wait at least 100us after reset
159 	 * before using MII, so we enforce the delay here
160 	 */
161 	udelay(100);
162 }
163 
164 /*
165  * FPGA
166  */
167 static iomux_v3_cfg_t fpga_pads[] = {
168 	/* FPGA_RESET_N */
169 	MX6_PAD_DISP0_DAT13__GPIO5_IO07 | MUX_PAD_CTRL(NO_PAD_CTRL),
170 };
171 
172 static void novena_spl_setup_iomux_fpga(void)
173 {
174 	imx_iomux_v3_setup_multiple_pads(fpga_pads, ARRAY_SIZE(fpga_pads));
175 	gpio_direction_output(NOVENA_FPGA_RESET_N_GPIO, 0);
176 }
177 
178 /*
179  * GPIO Button
180  */
181 static iomux_v3_cfg_t button_pads[] = {
182 	/* Debug */
183 	MX6_PAD_KEY_COL4__GPIO4_IO14 | MUX_PAD_CTRL(BUTTON_PAD_CTRL),
184 };
185 
186 static void novena_spl_setup_iomux_buttons(void)
187 {
188 	imx_iomux_v3_setup_multiple_pads(button_pads, ARRAY_SIZE(button_pads));
189 }
190 
191 /*
192  * I2C
193  */
194 /*
195  * I2C1:
196  *  0x1d ... MMA7455L
197  *  0x30 ... SO-DIMM temp sensor
198  *  0x44 ... STMPE610
199  *  0x50 ... SO-DIMM ID
200  */
201 struct i2c_pads_info i2c_pad_info0 = {
202 	.scl = {
203 		.i2c_mode	= MX6_PAD_EIM_D21__I2C1_SCL | PC,
204 		.gpio_mode	= MX6_PAD_EIM_D21__GPIO3_IO21 | PC,
205 		.gp		= IMX_GPIO_NR(3, 21)
206 	},
207 	.sda = {
208 		.i2c_mode	= MX6_PAD_EIM_D28__I2C1_SDA | PC,
209 		.gpio_mode	= MX6_PAD_EIM_D28__GPIO3_IO28 | PC,
210 		.gp		= IMX_GPIO_NR(3, 28)
211 	}
212 };
213 
214 /*
215  * I2C2:
216  *  0x08 ... PMIC
217  *  0x3a ... HDMI DCC
218  *  0x50 ... HDMI DCC
219  */
220 static struct i2c_pads_info i2c_pad_info1 = {
221 	.scl = {
222 		.i2c_mode	= MX6_PAD_EIM_EB2__I2C2_SCL | PC,
223 		.gpio_mode	= MX6_PAD_EIM_EB2__GPIO2_IO30 | PC,
224 		.gp		= IMX_GPIO_NR(2, 30)
225 	},
226 	.sda = {
227 		.i2c_mode	= MX6_PAD_EIM_D16__I2C2_SDA | PC,
228 		.gpio_mode	= MX6_PAD_EIM_D16__GPIO3_IO16 | PC,
229 		.gp		= IMX_GPIO_NR(3, 16)
230 	}
231 };
232 
233 /*
234  * I2C3:
235  *  0x11 ... ES8283
236  *  0x50 ... LCD EDID
237  *  0x56 ... EEPROM
238  */
239 static struct i2c_pads_info i2c_pad_info2 = {
240 	.scl = {
241 		.i2c_mode	= MX6_PAD_EIM_D17__I2C3_SCL | PC,
242 		.gpio_mode	= MX6_PAD_EIM_D17__GPIO3_IO17 | PC,
243 		.gp		= IMX_GPIO_NR(3, 17)
244 	},
245 	.sda = {
246 		.i2c_mode	= MX6_PAD_EIM_D18__I2C3_SDA | PC,
247 		.gpio_mode	= MX6_PAD_EIM_D18__GPIO3_IO18 | PC,
248 		.gp		= IMX_GPIO_NR(3, 18)
249 	}
250 };
251 
252 static void novena_spl_setup_iomux_i2c(void)
253 {
254 	setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info0);
255 	setup_i2c(1, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);
256 	setup_i2c(2, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info2);
257 }
258 
259 /*
260  * PCI express
261  */
262 #ifdef CONFIG_CMD_PCI
263 static iomux_v3_cfg_t pcie_pads[] = {
264 	/* "Reset" pin */
265 	MX6_PAD_EIM_D29__GPIO3_IO29 | MUX_PAD_CTRL(NO_PAD_CTRL),
266 	/* "Power on" pin */
267 	MX6_PAD_GPIO_17__GPIO7_IO12 | MUX_PAD_CTRL(NO_PAD_CTRL),
268 	/* "Wake up" pin (input) */
269 	MX6_PAD_EIM_D22__GPIO3_IO22 | MUX_PAD_CTRL(NO_PAD_CTRL),
270 	/* "Disable endpoint" (rfkill) pin */
271 	MX6_PAD_EIM_A22__GPIO2_IO16 | MUX_PAD_CTRL(NO_PAD_CTRL),
272 };
273 
274 static void novena_spl_setup_iomux_pcie(void)
275 {
276 	imx_iomux_v3_setup_multiple_pads(pcie_pads, ARRAY_SIZE(pcie_pads));
277 
278 	/* Ensure PCIe is powered down */
279 	gpio_direction_output(NOVENA_PCIE_POWER_ON_GPIO, 0);
280 
281 	/* Put the card into reset */
282 	gpio_direction_output(NOVENA_PCIE_RESET_GPIO, 0);
283 
284 	/* Input signal to wake system from mPCIe card */
285 	gpio_direction_input(NOVENA_PCIE_WAKE_UP_GPIO);
286 
287 	/* Drive RFKILL high, to ensure the radio is turned on */
288 	gpio_direction_output(NOVENA_PCIE_DISABLE_GPIO, 1);
289 }
290 #else
291 static inline void novena_spl_setup_iomux_pcie(void) {}
292 #endif
293 
294 /*
295  * SDHC
296  */
297 static iomux_v3_cfg_t usdhc2_pads[] = {
298 	MX6_PAD_SD2_CLK__SD2_CLK    | MUX_PAD_CTRL(USDHC_PAD_CTRL),
299 	MX6_PAD_SD2_CMD__SD2_CMD    | MUX_PAD_CTRL(USDHC_PAD_CTRL),
300 	MX6_PAD_SD2_DAT0__SD2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
301 	MX6_PAD_SD2_DAT1__SD2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
302 	MX6_PAD_SD2_DAT2__SD2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
303 	MX6_PAD_SD2_DAT3__SD2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
304 	MX6_PAD_GPIO_2__GPIO1_IO02  | MUX_PAD_CTRL(NO_PAD_CTRL), /* WP */
305 	MX6_PAD_GPIO_4__GPIO1_IO04  | MUX_PAD_CTRL(NO_PAD_CTRL), /* CD */
306 };
307 
308 static iomux_v3_cfg_t usdhc3_pads[] = {
309 	MX6_PAD_SD3_CLK__SD3_CLK    | MUX_PAD_CTRL(USDHC_PAD_CTRL),
310 	MX6_PAD_SD3_CMD__SD3_CMD    | MUX_PAD_CTRL(USDHC_PAD_CTRL),
311 	MX6_PAD_SD3_DAT0__SD3_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
312 	MX6_PAD_SD3_DAT1__SD3_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
313 	MX6_PAD_SD3_DAT2__SD3_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
314 	MX6_PAD_SD3_DAT3__SD3_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
315 };
316 
317 static void novena_spl_setup_iomux_sdhc(void)
318 {
319 	imx_iomux_v3_setup_multiple_pads(usdhc2_pads, ARRAY_SIZE(usdhc2_pads));
320 	imx_iomux_v3_setup_multiple_pads(usdhc3_pads, ARRAY_SIZE(usdhc3_pads));
321 
322 	/* Big SD write-protect and card-detect */
323 	gpio_direction_input(IMX_GPIO_NR(1, 2));
324 	gpio_direction_input(IMX_GPIO_NR(1, 4));
325 }
326 
327 /*
328  * SPI
329  */
330 #ifdef CONFIG_MXC_SPI
331 static iomux_v3_cfg_t ecspi3_pads[] = {
332 	/* SS1 */
333 	MX6_PAD_DISP0_DAT1__ECSPI3_MOSI | MUX_PAD_CTRL(SPI_PAD_CTRL),
334 	MX6_PAD_DISP0_DAT2__ECSPI3_MISO | MUX_PAD_CTRL(SPI_PAD_CTRL),
335 	MX6_PAD_DISP0_DAT0__ECSPI3_SCLK | MUX_PAD_CTRL(SPI_PAD_CTRL),
336 	MX6_PAD_DISP0_DAT3__GPIO4_IO24 | MUX_PAD_CTRL(SPI_PAD_CTRL),
337 	MX6_PAD_DISP0_DAT4__GPIO4_IO25 | MUX_PAD_CTRL(SPI_PAD_CTRL),
338 	MX6_PAD_DISP0_DAT5__GPIO4_IO26 | MUX_PAD_CTRL(SPI_PAD_CTRL),
339 	MX6_PAD_DISP0_DAT7__ECSPI3_RDY | MUX_PAD_CTRL(SPI_PAD_CTRL),
340 };
341 
342 static void novena_spl_setup_iomux_spi(void)
343 {
344 	imx_iomux_v3_setup_multiple_pads(ecspi3_pads, ARRAY_SIZE(ecspi3_pads));
345 	/* De-assert the nCS */
346 	gpio_direction_output(MX6_PAD_DISP0_DAT3__GPIO4_IO24, 1);
347 	gpio_direction_output(MX6_PAD_DISP0_DAT4__GPIO4_IO25, 1);
348 	gpio_direction_output(MX6_PAD_DISP0_DAT5__GPIO4_IO26, 1);
349 }
350 #else
351 static void novena_spl_setup_iomux_spi(void) {}
352 #endif
353 
354 /*
355  * UART
356  */
357 static iomux_v3_cfg_t const uart2_pads[] = {
358 	MX6_PAD_EIM_D26__UART2_TX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL),
359 	MX6_PAD_EIM_D27__UART2_RX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL),
360 };
361 
362 static iomux_v3_cfg_t const uart3_pads[] = {
363 	MX6_PAD_EIM_D24__UART3_TX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL),
364 	MX6_PAD_EIM_D25__UART3_RX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL),
365 };
366 
367 static iomux_v3_cfg_t const uart4_pads[] = {
368 	MX6_PAD_KEY_COL0__UART4_TX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL),
369 	MX6_PAD_KEY_ROW0__UART4_RX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL),
370 	MX6_PAD_CSI0_DAT16__UART4_CTS_B | MUX_PAD_CTRL(UART_PAD_CTRL),
371 	MX6_PAD_CSI0_DAT17__UART4_RTS_B | MUX_PAD_CTRL(UART_PAD_CTRL),
372 
373 };
374 
375 static void novena_spl_setup_iomux_uart(void)
376 {
377 	imx_iomux_v3_setup_multiple_pads(uart2_pads, ARRAY_SIZE(uart2_pads));
378 	imx_iomux_v3_setup_multiple_pads(uart3_pads, ARRAY_SIZE(uart3_pads));
379 	imx_iomux_v3_setup_multiple_pads(uart4_pads, ARRAY_SIZE(uart4_pads));
380 }
381 
382 /*
383  * Video
384  */
385 #ifdef CONFIG_VIDEO
386 static iomux_v3_cfg_t hdmi_pads[] = {
387 	/* "Ghost HPD" pin */
388 	MX6_PAD_EIM_A24__GPIO5_IO04 | MUX_PAD_CTRL(NO_PAD_CTRL),
389 
390 	/* LCD_PWR_CTL */
391 	MX6_PAD_CSI0_DAT10__GPIO5_IO28 | MUX_PAD_CTRL(NO_PAD_CTRL),
392 	/* LCD_BL_ON */
393 	MX6_PAD_KEY_ROW4__GPIO4_IO15 | MUX_PAD_CTRL(NO_PAD_CTRL),
394 	/* GPIO_PWM1 */
395 	MX6_PAD_DISP0_DAT8__GPIO4_IO29 | MUX_PAD_CTRL(NO_PAD_CTRL),
396 };
397 
398 static void novena_spl_setup_iomux_video(void)
399 {
400 	imx_iomux_v3_setup_multiple_pads(hdmi_pads, ARRAY_SIZE(hdmi_pads));
401 	gpio_direction_input(NOVENA_HDMI_GHOST_HPD);
402 }
403 #else
404 static inline void novena_spl_setup_iomux_video(void) {}
405 #endif
406 
407 /*
408  * SPL boots from uSDHC card
409  */
410 #ifdef CONFIG_FSL_ESDHC
411 static struct fsl_esdhc_cfg usdhc_cfg = {
412 	USDHC3_BASE_ADDR, 0, 4
413 };
414 
415 int board_mmc_getcd(struct mmc *mmc)
416 {
417 	/* There is no CD for a microSD card, assume always present. */
418 	return 1;
419 }
420 
421 int board_mmc_init(bd_t *bis)
422 {
423 	usdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
424 	return fsl_esdhc_initialize(bis, &usdhc_cfg);
425 }
426 #endif
427 
428 /* Configure MX6Q/DUAL mmdc DDR io registers */
429 static struct mx6dq_iomux_ddr_regs novena_ddr_ioregs = {
430 	/* SDCLK[0:1], CAS, RAS, Reset: Differential input, 40ohm */
431 	.dram_sdclk_0		= 0x00020038,
432 	.dram_sdclk_1		= 0x00020038,
433 	.dram_cas		= 0x00000038,
434 	.dram_ras		= 0x00000038,
435 	.dram_reset		= 0x00000038,
436 	/* SDCKE[0:1]: 100k pull-up */
437 	.dram_sdcke0		= 0x00000038,
438 	.dram_sdcke1		= 0x00000038,
439 	/* SDBA2: pull-up disabled */
440 	.dram_sdba2		= 0x00000000,
441 	/* SDODT[0:1]: 100k pull-up, 40 ohm */
442 	.dram_sdodt0		= 0x00000038,
443 	.dram_sdodt1		= 0x00000038,
444 	/* SDQS[0:7]: Differential input, 40 ohm */
445 	.dram_sdqs0		= 0x00000038,
446 	.dram_sdqs1		= 0x00000038,
447 	.dram_sdqs2		= 0x00000038,
448 	.dram_sdqs3		= 0x00000038,
449 	.dram_sdqs4		= 0x00000038,
450 	.dram_sdqs5		= 0x00000038,
451 	.dram_sdqs6		= 0x00000038,
452 	.dram_sdqs7		= 0x00000038,
453 
454 	/* DQM[0:7]: Differential input, 40 ohm */
455 	.dram_dqm0		= 0x00000038,
456 	.dram_dqm1		= 0x00000038,
457 	.dram_dqm2		= 0x00000038,
458 	.dram_dqm3		= 0x00000038,
459 	.dram_dqm4		= 0x00000038,
460 	.dram_dqm5		= 0x00000038,
461 	.dram_dqm6		= 0x00000038,
462 	.dram_dqm7		= 0x00000038,
463 };
464 
465 /* Configure MX6Q/DUAL mmdc GRP io registers */
466 static struct mx6dq_iomux_grp_regs novena_grp_ioregs = {
467 	/* DDR3 */
468 	.grp_ddr_type		= 0x000c0000,
469 	.grp_ddrmode_ctl	= 0x00020000,
470 	/* Disable DDR pullups */
471 	.grp_ddrpke		= 0x00000000,
472 	/* ADDR[00:16], SDBA[0:1]: 40 ohm */
473 	.grp_addds		= 0x00000038,
474 	/* CS0/CS1/SDBA2/CKE0/CKE1/SDWE: 40 ohm */
475 	.grp_ctlds		= 0x00000038,
476 	/* DATA[00:63]: Differential input, 40 ohm */
477 	.grp_ddrmode		= 0x00020000,
478 	.grp_b0ds		= 0x00000038,
479 	.grp_b1ds		= 0x00000038,
480 	.grp_b2ds		= 0x00000038,
481 	.grp_b3ds		= 0x00000038,
482 	.grp_b4ds		= 0x00000038,
483 	.grp_b5ds		= 0x00000038,
484 	.grp_b6ds		= 0x00000038,
485 	.grp_b7ds		= 0x00000038,
486 };
487 
488 static struct mx6_mmdc_calibration novena_mmdc_calib = {
489 	/* write leveling calibration determine */
490 	.p0_mpwldectrl0		= 0x00420048,
491 	.p0_mpwldectrl1		= 0x006f0059,
492 	.p1_mpwldectrl0		= 0x005a0104,
493 	.p1_mpwldectrl1		= 0x01070113,
494 	/* Read DQS Gating calibration */
495 	.p0_mpdgctrl0		= 0x437c040b,
496 	.p0_mpdgctrl1		= 0x0413040e,
497 	.p1_mpdgctrl0		= 0x444f0446,
498 	.p1_mpdgctrl1		= 0x044d0422,
499 	/* Read Calibration: DQS delay relative to DQ read access */
500 	.p0_mprddlctl		= 0x4c424249,
501 	.p1_mprddlctl		= 0x4e48414f,
502 	/* Write Calibration: DQ/DM delay relative to DQS write access */
503 	.p0_mpwrdlctl		= 0x42414641,
504 	.p1_mpwrdlctl		= 0x46374b43,
505 };
506 
507 static struct mx6_ddr_sysinfo novena_ddr_info = {
508 	/* Width of data bus: 0=16, 1=32, 2=64 */
509 	.dsize		= 2,
510 	/* Config for full 4GB range so that get_mem_size() works */
511 	.cs_density	= 32,	/* 32Gb per CS */
512 	/* Single chip select */
513 	.ncs		= 1,
514 	.cs1_mirror	= 0,
515 	.rtt_wr		= 0,	/* RTT_Wr = RZQ/4 */
516 	.rtt_nom	= 1,	/* RTT_Nom = RZQ/2 */
517 	.walat		= 0,	/* Write additional latency */
518 	.ralat		= 5,	/* Read additional latency */
519 	.mif3_mode	= 3,	/* Command prediction working mode */
520 	.bi_on		= 1,	/* Bank interleaving enabled */
521 	.sde_to_rst	= 0x10,	/* 14 cycles, 200us (JEDEC default) */
522 	.rst_to_cke	= 0x23,	/* 33 cycles, 500us (JEDEC default) */
523 	.refsel = 1,	/* Refresh cycles at 32KHz */
524 	.refr = 7,	/* 8 refresh commands per refresh cycle */
525 };
526 
527 static struct mx6_ddr3_cfg elpida_4gib_1600 = {
528 	.mem_speed	= 1600,
529 	.density	= 4,
530 	.width		= 64,
531 	.banks		= 8,
532 	.rowaddr	= 16,
533 	.coladdr	= 10,
534 	.pagesz		= 2,
535 	.trcd		= 1375,
536 	.trcmin		= 4875,
537 	.trasmin	= 3500,
538 };
539 
540 static void ccgr_init(void)
541 {
542 	struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
543 
544 	writel(0x00C03F3F, &ccm->CCGR0);
545 	writel(0x0030FC03, &ccm->CCGR1);
546 	writel(0x0FFFC000, &ccm->CCGR2);
547 	writel(0x3FF00000, &ccm->CCGR3);
548 	writel(0xFFFFF300, &ccm->CCGR4);
549 	writel(0x0F0000C3, &ccm->CCGR5);
550 	writel(0x000003FF, &ccm->CCGR6);
551 }
552 
553 static void gpr_init(void)
554 {
555 	struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
556 
557 	/* enable AXI cache for VDOA/VPU/IPU */
558 	writel(0xF00000CF, &iomux->gpr[4]);
559 	/* set IPU AXI-id0 Qos=0xf(bypass) AXI-id1 Qos=0x7 */
560 	writel(0x007F007F, &iomux->gpr[6]);
561 	writel(0x007F007F, &iomux->gpr[7]);
562 }
563 
564 /*
565  * called from C runtime startup code (arch/arm/lib/crt0.S:_main)
566  * - we have a stack and a place to store GD, both in SRAM
567  * - no variable global data is available
568  */
569 void board_init_f(ulong dummy)
570 {
571 	/* setup AIPS and disable watchdog */
572 	arch_cpu_init();
573 
574 	ccgr_init();
575 	gpr_init();
576 
577 	/* setup GP timer */
578 	timer_init();
579 
580 #ifdef CONFIG_BOARD_POSTCLK_INIT
581 	board_postclk_init();
582 #endif
583 #ifdef CONFIG_FSL_ESDHC
584 	get_clocks();
585 #endif
586 
587 	/* Setup IOMUX and configure basics. */
588 	novena_spl_setup_iomux_audio();
589 	novena_spl_setup_iomux_buttons();
590 	novena_spl_setup_iomux_enet();
591 	novena_spl_setup_iomux_fpga();
592 	novena_spl_setup_iomux_i2c();
593 	novena_spl_setup_iomux_pcie();
594 	novena_spl_setup_iomux_sdhc();
595 	novena_spl_setup_iomux_spi();
596 	novena_spl_setup_iomux_uart();
597 	novena_spl_setup_iomux_video();
598 
599 	/* UART clocks enabled and gd valid - init serial console */
600 	preloader_console_init();
601 
602 	/* Start the DDR DRAM */
603 	mx6dq_dram_iocfg(64, &novena_ddr_ioregs, &novena_grp_ioregs);
604 	mx6_dram_cfg(&novena_ddr_info, &novena_mmdc_calib, &elpida_4gib_1600);
605 
606 	/* Perform DDR DRAM calibration */
607 	udelay(100);
608 	mmdc_do_write_level_calibration(&novena_ddr_info);
609 	mmdc_do_dqs_calibration(&novena_ddr_info);
610 
611 	/* Clear the BSS. */
612 	memset(__bss_start, 0, __bss_end - __bss_start);
613 
614 	/* load/boot image from boot device */
615 	board_init_r(NULL, 0);
616 }
617