board/compulab/cl-som-am57x/eth.c

   1 /*
   2  * Ethernet specific code for CompuLab CL-SOM-AM57x module
   3  *
   4  * (C) Copyright 2016 CompuLab, Ltd. http://compulab.co.il/
   5  *
   6  * Author: Uri Mashiach <[email protected]>
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 #include <common.h>
  12 #include <cpsw.h>
  13 #include <miiphy.h>
  14 #include <asm/gpio.h>
  15 #include <asm/arch/sys_proto.h>
  16 #include "../common/eeprom.h"
  17
  18 static void cpsw_control(int enabled)
  19 {
  20         /* VTP can be added here */
  21 }
  22
  23 static struct cpsw_slave_data cl_som_am57x_cpsw_slaves[] = {
  24         {
  25                 .slave_reg_ofs  = 0x208,
  26                 .sliver_reg_ofs = 0xd80,
  27                 .phy_addr       = 0,
  28                 .phy_if         = PHY_INTERFACE_MODE_RMII,
  29         },
  30         {
  31                 .slave_reg_ofs  = 0x308,
  32                 .sliver_reg_ofs = 0xdc0,
  33                 .phy_addr       = 1,
  34                 .phy_if         = PHY_INTERFACE_MODE_RMII,
  35
  36         },
  37 };
  38
  39 static struct cpsw_platform_data cl_som_am57_cpsw_data = {
  40         .mdio_base              = CPSW_MDIO_BASE,
  41         .cpsw_base              = CPSW_BASE,
  42         .mdio_div               = 0xff,
  43         .channels               = 8,
  44         .cpdma_reg_ofs          = 0x800,
  45         .slaves                 = 2,
  46         .slave_data             = cl_som_am57x_cpsw_slaves,
  47         .ale_reg_ofs            = 0xd00,
  48         .ale_entries            = 1024,
  49         .host_port_reg_ofs      = 0x108,
  50         .hw_stats_reg_ofs       = 0x900,
  51         .bd_ram_ofs             = 0x2000,
  52         .mac_control            = (1 << 5),
  53         .control                = cpsw_control,
  54         .host_port_num          = 0,
  55         .version                = CPSW_CTRL_VERSION_2,
  56 };
  57
  58 /*
  59  * cl_som_am57x_efuse_read_mac_addr() - read Ethernet port MAC address.
  60  *       The information is retrieved from the SOC's registers.
  61  * @buff: read buffer.
  62  * @port_num: port number.
  63  */
  64 static void cl_som_am57x_efuse_read_mac_addr(uchar *buff, uint port_num)
  65 {
  66         uint32_t mac_hi, mac_lo;
  67
  68         if (port_num) {
  69                 mac_lo = readl((*ctrl)->control_core_mac_id_1_lo);
  70                 mac_hi = readl((*ctrl)->control_core_mac_id_1_hi);
  71         } else {
  72                 mac_lo = readl((*ctrl)->control_core_mac_id_0_lo);
  73                 mac_hi = readl((*ctrl)->control_core_mac_id_0_hi);
  74         }
  75
  76         buff[0] = (mac_hi & 0xFF0000) >> 16;
  77         buff[1] = (mac_hi & 0xFF00) >> 8;
  78         buff[2] = mac_hi & 0xFF;
  79         buff[3] = (mac_lo & 0xFF0000) >> 16;
  80         buff[4] = (mac_lo & 0xFF00) >> 8;
  81         buff[5] = mac_lo & 0xFF;
  82 }
  83
  84 /*
  85  * cl_som_am57x_handle_mac_address() - set MAC address in the U-Boot
  86  *      environment.
  87  *      The address is retrieved retrieved from an EEPROM field or from the
  88  *      SOC's registers.
  89  * @env_name: U-Boot environment name.
  90  * @field_name: EEPROM field name.
  91  * @port_num: SOC's port number.
  92  */
  93 static int cl_som_am57x_handle_mac_address(char *env_name, uint port_num)
  94 {
  95         int ret;
  96         uint8_t enetaddr[6];
  97
  98         ret = eth_getenv_enetaddr(env_name, enetaddr);
  99         if (ret)
 100                 return 0;
 101
 102         ret = cl_eeprom_read_mac_addr(enetaddr, CONFIG_SYS_I2C_EEPROM_BUS);
 103
 104         if (ret || !is_valid_ethaddr(enetaddr))
 105                 cl_som_am57x_efuse_read_mac_addr(enetaddr, port_num);
 106
 107         if (!is_valid_ethaddr(enetaddr))
 108                 return -1;
 109
 110         ret = eth_env_set_enetaddr(env_name, enetaddr);
 111         if (ret)
 112                 printf("cl-som-am57x: Failed to set Eth port %d MAC address\n",
 113                        port_num);
 114
 115         return ret;
 116 }
 117
 118 #define CL_SOM_AM57X_PHY_ADDR2                  0x01
 119 #define AR8033_PHY_DEBUG_ADDR_REG               0x1d
 120 #define AR8033_PHY_DEBUG_DATA_REG               0x1e
 121 #define AR8033_DEBUG_RGMII_RX_CLK_DLY_REG       0x00
 122 #define AR8033_DEBUG_RGMII_TX_CLK_DLY_REG       0x05
 123 #define AR8033_DEBUG_RGMII_RX_CLK_DLY_MASK      (1 << 15)
 124 #define AR8033_DEBUG_RGMII_TX_CLK_DLY_MASK      (1 << 8)
 125
 126 /*
 127  * cl_som_am57x_rgmii_clk_delay() - Set RGMII clock delay.
 128  *      Enable RX delay, disable TX delay.
 129  */
 130 static void cl_som_am57x_rgmii_clk_delay(void)
 131 {
 132         uint16_t mii_reg_val;
 133         const char *devname;
 134
 135         devname = miiphy_get_current_dev();
 136         /* PHY 2 */
 137         miiphy_write(devname, CL_SOM_AM57X_PHY_ADDR2, AR8033_PHY_DEBUG_ADDR_REG,
 138                      AR8033_DEBUG_RGMII_RX_CLK_DLY_REG);
 139         miiphy_read(devname, CL_SOM_AM57X_PHY_ADDR2, AR8033_PHY_DEBUG_DATA_REG,
 140                     &mii_reg_val);
 141         mii_reg_val |= AR8033_DEBUG_RGMII_RX_CLK_DLY_MASK;
 142         miiphy_write(devname, CL_SOM_AM57X_PHY_ADDR2, AR8033_PHY_DEBUG_DATA_REG,
 143                      mii_reg_val);
 144
 145         miiphy_write(devname, CL_SOM_AM57X_PHY_ADDR2, AR8033_PHY_DEBUG_ADDR_REG,
 146                      AR8033_DEBUG_RGMII_TX_CLK_DLY_REG);
 147         miiphy_read(devname, CL_SOM_AM57X_PHY_ADDR2, AR8033_PHY_DEBUG_DATA_REG,
 148                     &mii_reg_val);
 149         mii_reg_val &= ~AR8033_DEBUG_RGMII_TX_CLK_DLY_MASK;
 150         miiphy_write(devname, CL_SOM_AM57X_PHY_ADDR2, AR8033_PHY_DEBUG_DATA_REG,
 151                      mii_reg_val);
 152 }
 153
 154 #define CL_SOM_AM57X_GPIO_PHY1_RST 92 /* GPIO3_28 */
 155 #define CL_SOM_AM57X_RGMII_PORT1 1
 156
 157 int board_eth_init(bd_t *bis)
 158 {
 159         int ret;
 160         uint32_t ctrl_val;
 161         char *cpsw_phy_envval;
 162         int cpsw_act_phy = 1;
 163
 164         /* SB-SOM-AM57x primary Eth (P21) is routed to RGMII1 */
 165         ret = cl_som_am57x_handle_mac_address("ethaddr",
 166                                               CL_SOM_AM57X_RGMII_PORT1);
 167
 168         if (ret)
 169                 return -1;
 170
 171         /* Select RGMII for GMII1_SEL */
 172         ctrl_val = readl((*ctrl)->control_core_control_io1) & (~0x33);
 173         ctrl_val |= 0x22;
 174         writel(ctrl_val, (*ctrl)->control_core_control_io1);
 175         mdelay(10);
 176
 177         gpio_request(CL_SOM_AM57X_GPIO_PHY1_RST, "phy1_rst");
 178         gpio_direction_output(CL_SOM_AM57X_GPIO_PHY1_RST, 0);
 179         mdelay(20);
 180
 181         gpio_set_value(CL_SOM_AM57X_GPIO_PHY1_RST, 1);
 182         mdelay(20);
 183
 184         cpsw_phy_envval = env_get("cpsw_phy");
 185         if (cpsw_phy_envval != NULL)
 186                 cpsw_act_phy = simple_strtoul(cpsw_phy_envval, NULL, 0);
 187
 188         cl_som_am57_cpsw_data.active_slave = cpsw_act_phy;
 189
 190         ret = cpsw_register(&cl_som_am57_cpsw_data);
 191         if (ret < 0)
 192                 printf("Error %d registering CPSW switch\n", ret);
 193
 194         /* Set RGMII clock delay */
 195         cl_som_am57x_rgmii_clk_delay();
 196
 197         return ret;
 198 }