1 /* 2 * Copyright (C) 2012 Freescale Semiconductor, Inc. 3 * Author: Fabio Estevam <fabio.estevam@freescale.com> 4 * 5 * Copyright (C) 2013, 2014 TQ Systems (ported SabreSD to TQMa6x) 6 * Author: Markus Niebel <markus.niebel@tq-group.com> 7 * 8 * SPDX-License-Identifier: GPL-2.0+ 9 */ 10 11 #include <asm/io.h> 12 #include <asm/arch/clock.h> 13 #include <asm/arch/mx6-pins.h> 14 #include <asm/arch/imx-regs.h> 15 #include <asm/arch/iomux.h> 16 #include <asm/arch/sys_proto.h> 17 #include <linux/errno.h> 18 #include <asm/gpio.h> 19 #include <asm/imx-common/mxc_i2c.h> 20 21 #include <common.h> 22 #include <fsl_esdhc.h> 23 #include <libfdt.h> 24 #include <malloc.h> 25 #include <i2c.h> 26 #include <micrel.h> 27 #include <miiphy.h> 28 #include <mmc.h> 29 #include <netdev.h> 30 31 #include "tqma6_bb.h" 32 33 DECLARE_GLOBAL_DATA_PTR; 34 35 #define UART_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | \ 36 PAD_CTL_DSE_80ohm | PAD_CTL_SRE_FAST | PAD_CTL_HYS) 37 38 #define USDHC_CLK_PAD_CTRL (PAD_CTL_PUS_47K_UP | PAD_CTL_SPEED_LOW | \ 39 PAD_CTL_DSE_40ohm | PAD_CTL_SRE_FAST | PAD_CTL_HYS) 40 41 #define USDHC_PAD_CTRL (PAD_CTL_PUS_47K_UP | PAD_CTL_SPEED_LOW | \ 42 PAD_CTL_DSE_80ohm | PAD_CTL_SRE_FAST | PAD_CTL_HYS) 43 44 #define GPIO_OUT_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_LOW | \ 45 PAD_CTL_DSE_40ohm | PAD_CTL_HYS) 46 47 #define GPIO_IN_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_LOW | \ 48 PAD_CTL_DSE_40ohm | PAD_CTL_HYS) 49 50 #define SPI_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | \ 51 PAD_CTL_DSE_80ohm | PAD_CTL_SRE_FAST | PAD_CTL_HYS) 52 53 #define I2C_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | \ 54 PAD_CTL_DSE_40ohm | PAD_CTL_HYS | \ 55 PAD_CTL_ODE | PAD_CTL_SRE_FAST) 56 57 #if defined(CONFIG_MX6Q) 58 59 #define IOMUX_SW_PAD_CTRL_GRP_DDR_TYPE_RGMII 0x02e0790 60 #define IOMUX_SW_PAD_CTRL_GRP_RGMII_TERM 0x02e07ac 61 62 #elif defined(CONFIG_MX6S) 63 64 #define IOMUX_SW_PAD_CTRL_GRP_DDR_TYPE_RGMII 0x02e0768 65 #define IOMUX_SW_PAD_CTRL_GRP_RGMII_TERM 0x02e0788 66 67 #else 68 69 #error "need to define target CPU" 70 71 #endif 72 73 #define ENET_RX_PAD_CTRL (PAD_CTL_DSE_34ohm) 74 #define ENET_TX_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_DSE_34ohm) 75 #define ENET_CLK_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_HIGH | \ 76 PAD_CTL_DSE_34ohm) 77 #define ENET_MDIO_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | \ 78 PAD_CTL_DSE_60ohm) 79 80 /* disable on die termination for RGMII */ 81 #define IOMUX_SW_PAD_CTRL_GRP_RGMII_TERM_DISABLE 0x00000000 82 /* optimised drive strength for 1.0 .. 1.3 V signal on RGMII */ 83 #define IOMUX_SW_PAD_CTRL_GRP_DDR_TYPE_RGMII_1P2V 0x00080000 84 /* optimised drive strength for 1.3 .. 2.5 V signal on RGMII */ 85 #define IOMUX_SW_PAD_CTRL_GRP_DDR_TYPE_RGMII_1P5V 0x000C0000 86 87 #define ENET_PHY_RESET_GPIO IMX_GPIO_NR(1, 25) 88 89 static iomux_v3_cfg_t const mba6_enet_pads[] = { 90 NEW_PAD_CTRL(MX6_PAD_ENET_MDIO__ENET_MDIO, ENET_MDIO_PAD_CTRL), 91 NEW_PAD_CTRL(MX6_PAD_ENET_MDC__ENET_MDC, ENET_MDIO_PAD_CTRL), 92 93 NEW_PAD_CTRL(MX6_PAD_RGMII_TXC__RGMII_TXC, ENET_TX_PAD_CTRL), 94 NEW_PAD_CTRL(MX6_PAD_RGMII_TD0__RGMII_TD0, ENET_TX_PAD_CTRL), 95 NEW_PAD_CTRL(MX6_PAD_RGMII_TD1__RGMII_TD1, ENET_TX_PAD_CTRL), 96 NEW_PAD_CTRL(MX6_PAD_RGMII_TD2__RGMII_TD2, ENET_TX_PAD_CTRL), 97 NEW_PAD_CTRL(MX6_PAD_RGMII_TD3__RGMII_TD3, ENET_TX_PAD_CTRL), 98 NEW_PAD_CTRL(MX6_PAD_RGMII_TX_CTL__RGMII_TX_CTL, 99 ENET_TX_PAD_CTRL), 100 NEW_PAD_CTRL(MX6_PAD_ENET_REF_CLK__ENET_TX_CLK, ENET_CLK_PAD_CTRL), 101 /* 102 * these pins are also used for config strapping by phy 103 */ 104 NEW_PAD_CTRL(MX6_PAD_RGMII_RD0__RGMII_RD0, ENET_RX_PAD_CTRL), 105 NEW_PAD_CTRL(MX6_PAD_RGMII_RD1__RGMII_RD1, ENET_RX_PAD_CTRL), 106 NEW_PAD_CTRL(MX6_PAD_RGMII_RD2__RGMII_RD2, ENET_RX_PAD_CTRL), 107 NEW_PAD_CTRL(MX6_PAD_RGMII_RD3__RGMII_RD3, ENET_RX_PAD_CTRL), 108 NEW_PAD_CTRL(MX6_PAD_RGMII_RXC__RGMII_RXC, ENET_RX_PAD_CTRL), 109 NEW_PAD_CTRL(MX6_PAD_RGMII_RX_CTL__RGMII_RX_CTL, 110 ENET_RX_PAD_CTRL), 111 /* KSZ9031 PHY Reset */ 112 NEW_PAD_CTRL(MX6_PAD_ENET_CRS_DV__GPIO1_IO25, GPIO_OUT_PAD_CTRL), 113 }; 114 115 static void mba6_setup_iomuxc_enet(void) 116 { 117 __raw_writel(IOMUX_SW_PAD_CTRL_GRP_RGMII_TERM_DISABLE, 118 (void *)IOMUX_SW_PAD_CTRL_GRP_RGMII_TERM); 119 __raw_writel(IOMUX_SW_PAD_CTRL_GRP_DDR_TYPE_RGMII_1P5V, 120 (void *)IOMUX_SW_PAD_CTRL_GRP_DDR_TYPE_RGMII); 121 122 imx_iomux_v3_setup_multiple_pads(mba6_enet_pads, 123 ARRAY_SIZE(mba6_enet_pads)); 124 125 /* Reset PHY */ 126 gpio_direction_output(ENET_PHY_RESET_GPIO , 0); 127 /* Need delay 10ms after power on according to KSZ9031 spec */ 128 udelay(1000 * 10); 129 gpio_set_value(ENET_PHY_RESET_GPIO, 1); 130 /* 131 * KSZ9031 manual: 100 usec wait time after reset before communication 132 * over MDIO 133 * BUGBUG: hardware has an RC const that needs > 10 msec from 0->1 on 134 * reset before the phy sees a high level 135 */ 136 udelay(200); 137 } 138 139 static iomux_v3_cfg_t const mba6_uart2_pads[] = { 140 NEW_PAD_CTRL(MX6_PAD_SD4_DAT4__UART2_RX_DATA, UART_PAD_CTRL), 141 NEW_PAD_CTRL(MX6_PAD_SD4_DAT7__UART2_TX_DATA, UART_PAD_CTRL), 142 }; 143 144 static void mba6_setup_iomuxc_uart(void) 145 { 146 imx_iomux_v3_setup_multiple_pads(mba6_uart2_pads, 147 ARRAY_SIZE(mba6_uart2_pads)); 148 } 149 150 #define USDHC2_CD_GPIO IMX_GPIO_NR(1, 4) 151 #define USDHC2_WP_GPIO IMX_GPIO_NR(1, 2) 152 153 int tqma6_bb_board_mmc_getcd(struct mmc *mmc) 154 { 155 struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv; 156 int ret = 0; 157 158 if (cfg->esdhc_base == USDHC2_BASE_ADDR) 159 ret = !gpio_get_value(USDHC2_CD_GPIO); 160 161 return ret; 162 } 163 164 int tqma6_bb_board_mmc_getwp(struct mmc *mmc) 165 { 166 struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv; 167 int ret = 0; 168 169 if (cfg->esdhc_base == USDHC2_BASE_ADDR) 170 ret = gpio_get_value(USDHC2_WP_GPIO); 171 172 return ret; 173 } 174 175 static struct fsl_esdhc_cfg mba6_usdhc_cfg = { 176 .esdhc_base = USDHC2_BASE_ADDR, 177 .max_bus_width = 4, 178 }; 179 180 static iomux_v3_cfg_t const mba6_usdhc2_pads[] = { 181 NEW_PAD_CTRL(MX6_PAD_SD2_CLK__SD2_CLK, USDHC_CLK_PAD_CTRL), 182 NEW_PAD_CTRL(MX6_PAD_SD2_CMD__SD2_CMD, USDHC_PAD_CTRL), 183 NEW_PAD_CTRL(MX6_PAD_SD2_DAT0__SD2_DATA0, USDHC_PAD_CTRL), 184 NEW_PAD_CTRL(MX6_PAD_SD2_DAT1__SD2_DATA1, USDHC_PAD_CTRL), 185 NEW_PAD_CTRL(MX6_PAD_SD2_DAT2__SD2_DATA2, USDHC_PAD_CTRL), 186 NEW_PAD_CTRL(MX6_PAD_SD2_DAT3__SD2_DATA3, USDHC_PAD_CTRL), 187 /* CD */ 188 NEW_PAD_CTRL(MX6_PAD_GPIO_4__GPIO1_IO04, GPIO_IN_PAD_CTRL), 189 /* WP */ 190 NEW_PAD_CTRL(MX6_PAD_GPIO_2__GPIO1_IO02, GPIO_IN_PAD_CTRL), 191 }; 192 193 int tqma6_bb_board_mmc_init(bd_t *bis) 194 { 195 imx_iomux_v3_setup_multiple_pads(mba6_usdhc2_pads, 196 ARRAY_SIZE(mba6_usdhc2_pads)); 197 gpio_direction_input(USDHC2_CD_GPIO); 198 gpio_direction_input(USDHC2_WP_GPIO); 199 200 mba6_usdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK); 201 if (fsl_esdhc_initialize(bis, &mba6_usdhc_cfg)) 202 puts("Warning: failed to initialize SD\n"); 203 204 return 0; 205 } 206 207 static struct i2c_pads_info mba6_i2c1_pads = { 208 /* I2C1: MBa6x */ 209 .scl = { 210 .i2c_mode = NEW_PAD_CTRL(MX6_PAD_CSI0_DAT9__I2C1_SCL, 211 I2C_PAD_CTRL), 212 .gpio_mode = NEW_PAD_CTRL(MX6_PAD_CSI0_DAT9__GPIO5_IO27, 213 I2C_PAD_CTRL), 214 .gp = IMX_GPIO_NR(5, 27) 215 }, 216 .sda = { 217 .i2c_mode = NEW_PAD_CTRL(MX6_PAD_CSI0_DAT8__I2C1_SDA, 218 I2C_PAD_CTRL), 219 .gpio_mode = NEW_PAD_CTRL(MX6_PAD_CSI0_DAT8__GPIO5_IO26, 220 I2C_PAD_CTRL), 221 .gp = IMX_GPIO_NR(5, 26) 222 } 223 }; 224 225 static void mba6_setup_i2c(void) 226 { 227 int ret; 228 /* 229 * use logical index for bus, e.g. I2C1 -> 0 230 * warn on error 231 */ 232 ret = setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &mba6_i2c1_pads); 233 if (ret) 234 printf("setup I2C1 failed: %d\n", ret); 235 } 236 237 238 static iomux_v3_cfg_t const mba6_ecspi1_pads[] = { 239 NEW_PAD_CTRL(MX6_PAD_EIM_D24__GPIO3_IO24, SPI_PAD_CTRL), 240 NEW_PAD_CTRL(MX6_PAD_EIM_D25__GPIO3_IO25, SPI_PAD_CTRL), 241 }; 242 243 static unsigned const mba6_ecspi1_cs[] = { 244 IMX_GPIO_NR(3, 24), 245 IMX_GPIO_NR(3, 25), 246 }; 247 248 static void mba6_setup_iomuxc_spi(void) 249 { 250 unsigned i; 251 252 for (i = 0; i < ARRAY_SIZE(mba6_ecspi1_cs); ++i) 253 gpio_direction_output(mba6_ecspi1_cs[i], 1); 254 imx_iomux_v3_setup_multiple_pads(mba6_ecspi1_pads, 255 ARRAY_SIZE(mba6_ecspi1_pads)); 256 } 257 258 int board_phy_config(struct phy_device *phydev) 259 { 260 /* 261 * optimized pad skew values depends on CPU variant on the TQMa6x module: 262 * i.MX6Q/D or i.MX6DL/S 263 */ 264 #if defined(CONFIG_MX6Q) || defined(CONFIG_MX6Q) 265 #define MBA6X_KSZ9031_CTRL_SKEW 0x0032 266 #define MBA6X_KSZ9031_CLK_SKEW 0x03ff 267 #define MBA6X_KSZ9031_RX_SKEW 0x3333 268 #define MBA6X_KSZ9031_TX_SKEW 0x2036 269 #elif defined(CONFIG_MX6DL) || defined(CONFIG_MX6S) 270 #define MBA6X_KSZ9031_CTRL_SKEW 0x0030 271 #define MBA6X_KSZ9031_CLK_SKEW 0x03ff 272 #define MBA6X_KSZ9031_RX_SKEW 0x3333 273 #define MBA6X_KSZ9031_TX_SKEW 0x2052 274 #else 275 #error 276 #endif 277 /* min rx/tx ctrl delay */ 278 ksz9031_phy_extended_write(phydev, 2, 279 MII_KSZ9031_EXT_RGMII_CTRL_SIG_SKEW, 280 MII_KSZ9031_MOD_DATA_NO_POST_INC, 281 MBA6X_KSZ9031_CTRL_SKEW); 282 /* min rx delay */ 283 ksz9031_phy_extended_write(phydev, 2, 284 MII_KSZ9031_EXT_RGMII_RX_DATA_SKEW, 285 MII_KSZ9031_MOD_DATA_NO_POST_INC, 286 MBA6X_KSZ9031_RX_SKEW); 287 /* max tx delay */ 288 ksz9031_phy_extended_write(phydev, 2, 289 MII_KSZ9031_EXT_RGMII_TX_DATA_SKEW, 290 MII_KSZ9031_MOD_DATA_NO_POST_INC, 291 MBA6X_KSZ9031_TX_SKEW); 292 /* rx/tx clk skew */ 293 ksz9031_phy_extended_write(phydev, 2, 294 MII_KSZ9031_EXT_RGMII_CLOCK_SKEW, 295 MII_KSZ9031_MOD_DATA_NO_POST_INC, 296 MBA6X_KSZ9031_CLK_SKEW); 297 298 phydev->drv->config(phydev); 299 300 return 0; 301 } 302 303 int board_eth_init(bd_t *bis) 304 { 305 uint32_t base = IMX_FEC_BASE; 306 struct mii_dev *bus = NULL; 307 struct phy_device *phydev = NULL; 308 int ret; 309 310 bus = fec_get_miibus(base, -1); 311 if (!bus) 312 return -EINVAL; 313 /* scan phy */ 314 phydev = phy_find_by_mask(bus, (0xf << CONFIG_FEC_MXC_PHYADDR), 315 PHY_INTERFACE_MODE_RGMII); 316 317 if (!phydev) { 318 ret = -EINVAL; 319 goto free_bus; 320 } 321 ret = fec_probe(bis, -1, base, bus, phydev); 322 if (ret) 323 goto free_phydev; 324 325 return 0; 326 327 free_phydev: 328 free(phydev); 329 free_bus: 330 free(bus); 331 return ret; 332 } 333 334 int tqma6_bb_board_early_init_f(void) 335 { 336 mba6_setup_iomuxc_uart(); 337 338 return 0; 339 } 340 341 int tqma6_bb_board_init(void) 342 { 343 mba6_setup_i2c(); 344 mba6_setup_iomuxc_spi(); 345 /* do it here - to have reset completed */ 346 mba6_setup_iomuxc_enet(); 347 348 return 0; 349 } 350 351 int tqma6_bb_board_late_init(void) 352 { 353 return 0; 354 } 355 356 const char *tqma6_bb_get_boardname(void) 357 { 358 return "MBa6x"; 359 } 360 361 /* 362 * Device Tree Support 363 */ 364 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT) 365 void tqma6_bb_ft_board_setup(void *blob, bd_t *bd) 366 { 367 /* TBD */ 368 } 369 #endif /* defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT) */ 370