1 /* 2 * Copyright 2009-2010, 2013 Freescale Semiconductor, Inc. 3 * Jun-jie Zhang <b18070@freescale.com> 4 * Mingkai Hu <Mingkai.hu@freescale.com> 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 #include <common.h> 9 #include <miiphy.h> 10 #include <phy.h> 11 #include <fsl_mdio.h> 12 #include <asm/io.h> 13 #include <asm/errno.h> 14 #include <asm/fsl_enet.h> 15 16 void tsec_local_mdio_write(struct tsec_mii_mng __iomem *phyregs, int port_addr, 17 int dev_addr, int regnum, int value) 18 { 19 int timeout = 1000000; 20 21 out_be32(&phyregs->miimadd, (port_addr << 8) | (regnum & 0x1f)); 22 out_be32(&phyregs->miimcon, value); 23 asm("sync"); 24 25 while ((in_be32(&phyregs->miimind) & MIIMIND_BUSY) && timeout--) 26 ; 27 } 28 29 int tsec_local_mdio_read(struct tsec_mii_mng __iomem *phyregs, int port_addr, 30 int dev_addr, int regnum) 31 { 32 int value; 33 int timeout = 1000000; 34 35 /* Put the address of the phy, and the register 36 * number into MIIMADD */ 37 out_be32(&phyregs->miimadd, (port_addr << 8) | (regnum & 0x1f)); 38 39 /* Clear the command register, and wait */ 40 out_be32(&phyregs->miimcom, 0); 41 asm("sync"); 42 43 /* Initiate a read command, and wait */ 44 out_be32(&phyregs->miimcom, MIIMCOM_READ_CYCLE); 45 asm("sync"); 46 47 /* Wait for the the indication that the read is done */ 48 while ((in_be32(&phyregs->miimind) & (MIIMIND_NOTVALID | MIIMIND_BUSY)) 49 && timeout--) 50 ; 51 52 /* Grab the value read from the PHY */ 53 value = in_be32(&phyregs->miimstat); 54 55 return value; 56 } 57 58 static int fsl_pq_mdio_reset(struct mii_dev *bus) 59 { 60 struct tsec_mii_mng __iomem *regs = 61 (struct tsec_mii_mng __iomem *)bus->priv; 62 63 /* Reset MII (due to new addresses) */ 64 out_be32(®s->miimcfg, MIIMCFG_RESET_MGMT); 65 66 out_be32(®s->miimcfg, MIIMCFG_INIT_VALUE); 67 68 while (in_be32(®s->miimind) & MIIMIND_BUSY) 69 ; 70 71 return 0; 72 } 73 74 int tsec_phy_read(struct mii_dev *bus, int addr, int dev_addr, int regnum) 75 { 76 struct tsec_mii_mng __iomem *phyregs = 77 (struct tsec_mii_mng __iomem *)bus->priv; 78 79 return tsec_local_mdio_read(phyregs, addr, dev_addr, regnum); 80 } 81 82 int tsec_phy_write(struct mii_dev *bus, int addr, int dev_addr, int regnum, 83 u16 value) 84 { 85 struct tsec_mii_mng __iomem *phyregs = 86 (struct tsec_mii_mng __iomem *)bus->priv; 87 88 tsec_local_mdio_write(phyregs, addr, dev_addr, regnum, value); 89 90 return 0; 91 } 92 93 int fsl_pq_mdio_init(bd_t *bis, struct fsl_pq_mdio_info *info) 94 { 95 struct mii_dev *bus = mdio_alloc(); 96 97 if (!bus) { 98 printf("Failed to allocate FSL MDIO bus\n"); 99 return -1; 100 } 101 102 bus->read = tsec_phy_read; 103 bus->write = tsec_phy_write; 104 bus->reset = fsl_pq_mdio_reset; 105 sprintf(bus->name, info->name); 106 107 bus->priv = (void *)info->regs; 108 109 return mdio_register(bus); 110 } 111