1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2013 Freescale Semiconductor, Inc.
4 *
5 * Author: Fabio Estevam <fabio.estevam@freescale.com>
6 */
7
8 #include <asm/arch/clock.h>
9 #include <asm/arch/imx-regs.h>
10 #include <asm/arch/iomux.h>
11 #include <malloc.h>
12 #include <asm/arch/mx6-pins.h>
13 #include <linux/errno.h>
14 #include <asm/gpio.h>
15 #include <asm/mach-imx/iomux-v3.h>
16 #include <asm/mach-imx/sata.h>
17 #include <mmc.h>
18 #include <fsl_esdhc.h>
19 #include <asm/arch/crm_regs.h>
20 #include <asm/io.h>
21 #include <asm/arch/sys_proto.h>
22 #include <micrel.h>
23 #include <miiphy.h>
24 #include <netdev.h>
25
26 DECLARE_GLOBAL_DATA_PTR;
27
28 #define UART_PAD_CTRL (PAD_CTL_PUS_100K_UP | \
29 PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | \
30 PAD_CTL_SRE_FAST | PAD_CTL_HYS)
31
32 #define ENET_PAD_CTRL (PAD_CTL_PUS_100K_UP | \
33 PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | PAD_CTL_HYS)
34
35 #define USDHC_PAD_CTRL (PAD_CTL_PUS_47K_UP | \
36 PAD_CTL_SPEED_LOW | PAD_CTL_DSE_80ohm | \
37 PAD_CTL_SRE_FAST | PAD_CTL_HYS)
38
39 #define WDT_EN IMX_GPIO_NR(5, 4)
40 #define WDT_TRG IMX_GPIO_NR(3, 19)
41
dram_init(void)42 int dram_init(void)
43 {
44 gd->ram_size = imx_ddr_size();
45
46 return 0;
47 }
48
49 static iomux_v3_cfg_t const uart2_pads[] = {
50 IOMUX_PADS(PAD_EIM_D26__UART2_TX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL)),
51 IOMUX_PADS(PAD_EIM_D27__UART2_RX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL)),
52 };
53
54 static iomux_v3_cfg_t const usdhc3_pads[] = {
55 IOMUX_PADS(PAD_SD3_CLK__SD3_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
56 IOMUX_PADS(PAD_SD3_CMD__SD3_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
57 IOMUX_PADS(PAD_SD3_DAT0__SD3_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
58 IOMUX_PADS(PAD_SD3_DAT1__SD3_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
59 IOMUX_PADS(PAD_SD3_DAT2__SD3_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
60 IOMUX_PADS(PAD_SD3_DAT3__SD3_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
61 };
62
63 static iomux_v3_cfg_t const wdog_pads[] = {
64 IOMUX_PADS(PAD_EIM_A24__GPIO5_IO04 | MUX_PAD_CTRL(NO_PAD_CTRL)),
65 IOMUX_PADS(PAD_EIM_D19__GPIO3_IO19),
66 };
67
mx6_rgmii_rework(struct phy_device * phydev)68 int mx6_rgmii_rework(struct phy_device *phydev)
69 {
70 /*
71 * Bug: Apparently uDoo does not works with Gigabit switches...
72 * Limiting speed to 10/100Mbps, and setting master mode, seems to
73 * be the only way to have a successfull PHY auto negotiation.
74 * How to fix: Understand why Linux kernel do not have this issue.
75 */
76 phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, 0x1c00);
77
78 /* control data pad skew - devaddr = 0x02, register = 0x04 */
79 ksz9031_phy_extended_write(phydev, 0x02,
80 MII_KSZ9031_EXT_RGMII_CTRL_SIG_SKEW,
81 MII_KSZ9031_MOD_DATA_NO_POST_INC, 0x0000);
82 /* rx data pad skew - devaddr = 0x02, register = 0x05 */
83 ksz9031_phy_extended_write(phydev, 0x02,
84 MII_KSZ9031_EXT_RGMII_RX_DATA_SKEW,
85 MII_KSZ9031_MOD_DATA_NO_POST_INC, 0x0000);
86 /* tx data pad skew - devaddr = 0x02, register = 0x05 */
87 ksz9031_phy_extended_write(phydev, 0x02,
88 MII_KSZ9031_EXT_RGMII_TX_DATA_SKEW,
89 MII_KSZ9031_MOD_DATA_NO_POST_INC, 0x0000);
90 /* gtx and rx clock pad skew - devaddr = 0x02, register = 0x08 */
91 ksz9031_phy_extended_write(phydev, 0x02,
92 MII_KSZ9031_EXT_RGMII_CLOCK_SKEW,
93 MII_KSZ9031_MOD_DATA_NO_POST_INC, 0x03FF);
94 return 0;
95 }
96
97 static iomux_v3_cfg_t const enet_pads1[] = {
98 IOMUX_PADS(PAD_ENET_MDIO__ENET_MDIO | MUX_PAD_CTRL(ENET_PAD_CTRL)),
99 IOMUX_PADS(PAD_ENET_MDC__ENET_MDC | MUX_PAD_CTRL(ENET_PAD_CTRL)),
100 IOMUX_PADS(PAD_RGMII_TXC__RGMII_TXC | MUX_PAD_CTRL(ENET_PAD_CTRL)),
101 IOMUX_PADS(PAD_RGMII_TD0__RGMII_TD0 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
102 IOMUX_PADS(PAD_RGMII_TD1__RGMII_TD1 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
103 IOMUX_PADS(PAD_RGMII_TD2__RGMII_TD2 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
104 IOMUX_PADS(PAD_RGMII_TD3__RGMII_TD3 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
105 IOMUX_PADS(PAD_RGMII_TX_CTL__RGMII_TX_CTL | MUX_PAD_CTRL(ENET_PAD_CTRL)),
106 IOMUX_PADS(PAD_ENET_REF_CLK__ENET_TX_CLK | MUX_PAD_CTRL(ENET_PAD_CTRL)),
107 IOMUX_PADS(PAD_RGMII_RXC__RGMII_RXC | MUX_PAD_CTRL(ENET_PAD_CTRL)),
108 /* RGMII reset */
109 IOMUX_PADS(PAD_EIM_D23__GPIO3_IO23 | MUX_PAD_CTRL(NO_PAD_CTRL)),
110 /* Ethernet power supply */
111 IOMUX_PADS(PAD_EIM_EB3__GPIO2_IO31 | MUX_PAD_CTRL(NO_PAD_CTRL)),
112 /* pin 32 - 1 - (MODE0) all */
113 IOMUX_PADS(PAD_RGMII_RD0__GPIO6_IO25 | MUX_PAD_CTRL(NO_PAD_CTRL)),
114 /* pin 31 - 1 - (MODE1) all */
115 IOMUX_PADS(PAD_RGMII_RD1__GPIO6_IO27 | MUX_PAD_CTRL(NO_PAD_CTRL)),
116 /* pin 28 - 1 - (MODE2) all */
117 IOMUX_PADS(PAD_RGMII_RD2__GPIO6_IO28 | MUX_PAD_CTRL(NO_PAD_CTRL)),
118 /* pin 27 - 1 - (MODE3) all */
119 IOMUX_PADS(PAD_RGMII_RD3__GPIO6_IO29 | MUX_PAD_CTRL(NO_PAD_CTRL)),
120 /* pin 33 - 1 - (CLK125_EN) 125Mhz clockout enabled */
121 IOMUX_PADS(PAD_RGMII_RX_CTL__GPIO6_IO24 | MUX_PAD_CTRL(NO_PAD_CTRL)),
122 };
123
124 static iomux_v3_cfg_t const enet_pads2[] = {
125 IOMUX_PADS(PAD_RGMII_RD0__RGMII_RD0 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
126 IOMUX_PADS(PAD_RGMII_RD1__RGMII_RD1 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
127 IOMUX_PADS(PAD_RGMII_RD2__RGMII_RD2 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
128 IOMUX_PADS(PAD_RGMII_RD3__RGMII_RD3 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
129 IOMUX_PADS(PAD_RGMII_RX_CTL__RGMII_RX_CTL | MUX_PAD_CTRL(ENET_PAD_CTRL)),
130 };
131
setup_iomux_enet(void)132 static void setup_iomux_enet(void)
133 {
134 SETUP_IOMUX_PADS(enet_pads1);
135 udelay(20);
136 gpio_direction_output(IMX_GPIO_NR(2, 31), 1); /* Power supply on */
137
138 gpio_direction_output(IMX_GPIO_NR(3, 23), 0); /* assert PHY rst */
139
140 gpio_direction_output(IMX_GPIO_NR(6, 24), 1);
141 gpio_direction_output(IMX_GPIO_NR(6, 25), 1);
142 gpio_direction_output(IMX_GPIO_NR(6, 27), 1);
143 gpio_direction_output(IMX_GPIO_NR(6, 28), 1);
144 gpio_direction_output(IMX_GPIO_NR(6, 29), 1);
145 udelay(1000);
146
147 gpio_set_value(IMX_GPIO_NR(3, 23), 1); /* deassert PHY rst */
148
149 /* Need 100ms delay to exit from reset. */
150 udelay(1000 * 100);
151
152 gpio_free(IMX_GPIO_NR(6, 24));
153 gpio_free(IMX_GPIO_NR(6, 25));
154 gpio_free(IMX_GPIO_NR(6, 27));
155 gpio_free(IMX_GPIO_NR(6, 28));
156 gpio_free(IMX_GPIO_NR(6, 29));
157
158 SETUP_IOMUX_PADS(enet_pads2);
159 }
160
setup_iomux_uart(void)161 static void setup_iomux_uart(void)
162 {
163 SETUP_IOMUX_PADS(uart2_pads);
164 }
165
setup_iomux_wdog(void)166 static void setup_iomux_wdog(void)
167 {
168 SETUP_IOMUX_PADS(wdog_pads);
169 gpio_direction_output(WDT_TRG, 0);
170 gpio_direction_output(WDT_EN, 1);
171 gpio_direction_input(WDT_TRG);
172 }
173
174 static struct fsl_esdhc_cfg usdhc_cfg = { USDHC3_BASE_ADDR };
175
board_mmc_getcd(struct mmc * mmc)176 int board_mmc_getcd(struct mmc *mmc)
177 {
178 return 1; /* Always present */
179 }
180
board_eth_init(bd_t * bis)181 int board_eth_init(bd_t *bis)
182 {
183 uint32_t base = IMX_FEC_BASE;
184 struct mii_dev *bus = NULL;
185 struct phy_device *phydev = NULL;
186 int ret;
187
188 setup_iomux_enet();
189
190 #ifdef CONFIG_FEC_MXC
191 bus = fec_get_miibus(base, -1);
192 if (!bus)
193 return -EINVAL;
194 /* scan phy 4,5,6,7 */
195 phydev = phy_find_by_mask(bus, (0xf << 4), PHY_INTERFACE_MODE_RGMII);
196
197 if (!phydev) {
198 ret = -EINVAL;
199 goto free_bus;
200 }
201 printf("using phy at %d\n", phydev->addr);
202 ret = fec_probe(bis, -1, base, bus, phydev);
203 if (ret)
204 goto free_phydev;
205 #endif
206 return 0;
207
208 free_phydev:
209 free(phydev);
210 free_bus:
211 free(bus);
212 return ret;
213 }
214
board_mmc_init(bd_t * bis)215 int board_mmc_init(bd_t *bis)
216 {
217 SETUP_IOMUX_PADS(usdhc3_pads);
218 usdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
219 usdhc_cfg.max_bus_width = 4;
220
221 return fsl_esdhc_initialize(bis, &usdhc_cfg);
222 }
223
board_early_init_f(void)224 int board_early_init_f(void)
225 {
226 setup_iomux_wdog();
227 setup_iomux_uart();
228
229 return 0;
230 }
231
board_phy_config(struct phy_device * phydev)232 int board_phy_config(struct phy_device *phydev)
233 {
234 mx6_rgmii_rework(phydev);
235 if (phydev->drv->config)
236 phydev->drv->config(phydev);
237
238 return 0;
239 }
240
board_init(void)241 int board_init(void)
242 {
243 /* address of boot parameters */
244 gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
245
246 #ifdef CONFIG_SATA
247 setup_sata();
248 #endif
249 return 0;
250 }
251
board_late_init(void)252 int board_late_init(void)
253 {
254 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
255 if (is_cpu_type(MXC_CPU_MX6Q))
256 env_set("board_rev", "MX6Q");
257 else
258 env_set("board_rev", "MX6DL");
259 #endif
260 return 0;
261 }
262
checkboard(void)263 int checkboard(void)
264 {
265 if (is_cpu_type(MXC_CPU_MX6Q))
266 puts("Board: Udoo Quad\n");
267 else
268 puts("Board: Udoo DualLite\n");
269
270 return 0;
271 }
272