board/tqc/tqma6/tqma6_mba6.c

   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_80ohm | 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) */