1ec21e2ecSJeff Kirsher /* 2ec21e2ecSJeff Kirsher * Combined Ethernet driver for Motorola MPC8xx and MPC82xx. 3ec21e2ecSJeff Kirsher * 4ec21e2ecSJeff Kirsher * Copyright (c) 2003 Intracom S.A. 5ec21e2ecSJeff Kirsher * by Pantelis Antoniou <panto@intracom.gr> 6ec21e2ecSJeff Kirsher * 7ec21e2ecSJeff Kirsher * 2005 (c) MontaVista Software, Inc. 8ec21e2ecSJeff Kirsher * Vitaly Bordug <vbordug@ru.mvista.com> 9ec21e2ecSJeff Kirsher * 10ec21e2ecSJeff Kirsher * This file is licensed under the terms of the GNU General Public License 11ec21e2ecSJeff Kirsher * version 2. This program is licensed "as is" without any warranty of any 12ec21e2ecSJeff Kirsher * kind, whether express or implied. 13ec21e2ecSJeff Kirsher */ 14ec21e2ecSJeff Kirsher 15ec21e2ecSJeff Kirsher #include <linux/module.h> 16ec21e2ecSJeff Kirsher #include <linux/types.h> 17ec21e2ecSJeff Kirsher #include <linux/kernel.h> 18ec21e2ecSJeff Kirsher #include <linux/string.h> 19ec21e2ecSJeff Kirsher #include <linux/ptrace.h> 20ec21e2ecSJeff Kirsher #include <linux/errno.h> 21ec21e2ecSJeff Kirsher #include <linux/ioport.h> 22ec21e2ecSJeff Kirsher #include <linux/slab.h> 23ec21e2ecSJeff Kirsher #include <linux/interrupt.h> 24ec21e2ecSJeff Kirsher #include <linux/delay.h> 25ec21e2ecSJeff Kirsher #include <linux/netdevice.h> 26ec21e2ecSJeff Kirsher #include <linux/etherdevice.h> 27ec21e2ecSJeff Kirsher #include <linux/skbuff.h> 28ec21e2ecSJeff Kirsher #include <linux/spinlock.h> 29ec21e2ecSJeff Kirsher #include <linux/mii.h> 30ec21e2ecSJeff Kirsher #include <linux/ethtool.h> 31ec21e2ecSJeff Kirsher #include <linux/bitops.h> 32ec21e2ecSJeff Kirsher #include <linux/platform_device.h> 335af50730SRob Herring #include <linux/of_address.h> 34ec21e2ecSJeff Kirsher #include <linux/of_platform.h> 35ca5999fdSMike Rapoport #include <linux/pgtable.h> 3665fddcfcSMike Rapoport 37ec21e2ecSJeff Kirsher #include <asm/irq.h> 387c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 39ec21e2ecSJeff Kirsher #include <asm/mpc5xxx.h> 40ec21e2ecSJeff Kirsher 41ec21e2ecSJeff Kirsher #include "fs_enet.h" 42ec21e2ecSJeff Kirsher #include "fec.h" 43ec21e2ecSJeff Kirsher 44ec21e2ecSJeff Kirsher /* Make MII read/write commands for the FEC. 45ec21e2ecSJeff Kirsher */ 46ec21e2ecSJeff Kirsher #define mk_mii_read(REG) (0x60020000 | ((REG & 0x1f) << 18)) 47ec21e2ecSJeff Kirsher #define mk_mii_write(REG, VAL) (0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff)) 48ec21e2ecSJeff Kirsher #define mk_mii_end 0 49ec21e2ecSJeff Kirsher 50ec21e2ecSJeff Kirsher #define FEC_MII_LOOPS 10000 51ec21e2ecSJeff Kirsher 52ec21e2ecSJeff Kirsher static int fs_enet_fec_mii_read(struct mii_bus *bus , int phy_id, int location) 53ec21e2ecSJeff Kirsher { 54ec21e2ecSJeff Kirsher struct fec_info* fec = bus->priv; 55ec21e2ecSJeff Kirsher struct fec __iomem *fecp = fec->fecp; 56ec21e2ecSJeff Kirsher int i, ret = -1; 57ec21e2ecSJeff Kirsher 58ec21e2ecSJeff Kirsher BUG_ON((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0); 59ec21e2ecSJeff Kirsher 60ec21e2ecSJeff Kirsher /* Add PHY address to register command. */ 61ec21e2ecSJeff Kirsher out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_read(location)); 62ec21e2ecSJeff Kirsher 63ec21e2ecSJeff Kirsher for (i = 0; i < FEC_MII_LOOPS; i++) 64ec21e2ecSJeff Kirsher if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0) 65ec21e2ecSJeff Kirsher break; 66ec21e2ecSJeff Kirsher 67ec21e2ecSJeff Kirsher if (i < FEC_MII_LOOPS) { 68ec21e2ecSJeff Kirsher out_be32(&fecp->fec_ievent, FEC_ENET_MII); 69ec21e2ecSJeff Kirsher ret = in_be32(&fecp->fec_mii_data) & 0xffff; 70ec21e2ecSJeff Kirsher } 71ec21e2ecSJeff Kirsher 72ec21e2ecSJeff Kirsher return ret; 73ec21e2ecSJeff Kirsher } 74ec21e2ecSJeff Kirsher 75ec21e2ecSJeff Kirsher static int fs_enet_fec_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val) 76ec21e2ecSJeff Kirsher { 77ec21e2ecSJeff Kirsher struct fec_info* fec = bus->priv; 78ec21e2ecSJeff Kirsher struct fec __iomem *fecp = fec->fecp; 79ec21e2ecSJeff Kirsher int i; 80ec21e2ecSJeff Kirsher 81ec21e2ecSJeff Kirsher /* this must never happen */ 82ec21e2ecSJeff Kirsher BUG_ON((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0); 83ec21e2ecSJeff Kirsher 84ec21e2ecSJeff Kirsher /* Add PHY address to register command. */ 85ec21e2ecSJeff Kirsher out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_write(location, val)); 86ec21e2ecSJeff Kirsher 87ec21e2ecSJeff Kirsher for (i = 0; i < FEC_MII_LOOPS; i++) 88ec21e2ecSJeff Kirsher if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0) 89ec21e2ecSJeff Kirsher break; 90ec21e2ecSJeff Kirsher 91ec21e2ecSJeff Kirsher if (i < FEC_MII_LOOPS) 92ec21e2ecSJeff Kirsher out_be32(&fecp->fec_ievent, FEC_ENET_MII); 93ec21e2ecSJeff Kirsher 94ec21e2ecSJeff Kirsher return 0; 95ec21e2ecSJeff Kirsher 96ec21e2ecSJeff Kirsher } 97ec21e2ecSJeff Kirsher 9894e5a2a8SFabian Frederick static const struct of_device_id fs_enet_mdio_fec_match[]; 994f2c53eaSBill Pemberton static int fs_enet_mdio_probe(struct platform_device *ofdev) 100ec21e2ecSJeff Kirsher { 101ec21e2ecSJeff Kirsher const struct of_device_id *match; 102ec21e2ecSJeff Kirsher struct resource res; 103ec21e2ecSJeff Kirsher struct mii_bus *new_bus; 104ec21e2ecSJeff Kirsher struct fec_info *fec; 105ec21e2ecSJeff Kirsher int (*get_bus_freq)(struct device_node *); 106ec21e2ecSJeff Kirsher int ret = -ENOMEM, clock, speed; 107ec21e2ecSJeff Kirsher 108ec21e2ecSJeff Kirsher match = of_match_device(fs_enet_mdio_fec_match, &ofdev->dev); 109ec21e2ecSJeff Kirsher if (!match) 110ec21e2ecSJeff Kirsher return -EINVAL; 111ec21e2ecSJeff Kirsher get_bus_freq = match->data; 112ec21e2ecSJeff Kirsher 113ec21e2ecSJeff Kirsher new_bus = mdiobus_alloc(); 114ec21e2ecSJeff Kirsher if (!new_bus) 115ec21e2ecSJeff Kirsher goto out; 116ec21e2ecSJeff Kirsher 117ec21e2ecSJeff Kirsher fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL); 118ec21e2ecSJeff Kirsher if (!fec) 119ec21e2ecSJeff Kirsher goto out_mii; 120ec21e2ecSJeff Kirsher 121ec21e2ecSJeff Kirsher new_bus->priv = fec; 122ec21e2ecSJeff Kirsher new_bus->name = "FEC MII Bus"; 123ec21e2ecSJeff Kirsher new_bus->read = &fs_enet_fec_mii_read; 124ec21e2ecSJeff Kirsher new_bus->write = &fs_enet_fec_mii_write; 125ec21e2ecSJeff Kirsher 126ec21e2ecSJeff Kirsher ret = of_address_to_resource(ofdev->dev.of_node, 0, &res); 127ec21e2ecSJeff Kirsher if (ret) 128ec21e2ecSJeff Kirsher goto out_res; 129ec21e2ecSJeff Kirsher 130ec21e2ecSJeff Kirsher snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", res.start); 131ec21e2ecSJeff Kirsher 132ec21e2ecSJeff Kirsher fec->fecp = ioremap(res.start, resource_size(&res)); 133137bc99fSJulia Lawall if (!fec->fecp) { 134137bc99fSJulia Lawall ret = -ENOMEM; 135ec21e2ecSJeff Kirsher goto out_fec; 136137bc99fSJulia Lawall } 137ec21e2ecSJeff Kirsher 138ec21e2ecSJeff Kirsher if (get_bus_freq) { 139ec21e2ecSJeff Kirsher clock = get_bus_freq(ofdev->dev.of_node); 140ec21e2ecSJeff Kirsher if (!clock) { 141ec21e2ecSJeff Kirsher /* Use maximum divider if clock is unknown */ 142ec21e2ecSJeff Kirsher dev_warn(&ofdev->dev, "could not determine IPS clock\n"); 143ec21e2ecSJeff Kirsher clock = 0x3F * 5000000; 144ec21e2ecSJeff Kirsher } 145ec21e2ecSJeff Kirsher } else 146ec21e2ecSJeff Kirsher clock = ppc_proc_freq; 147ec21e2ecSJeff Kirsher 148ec21e2ecSJeff Kirsher /* 149ec21e2ecSJeff Kirsher * Scale for a MII clock <= 2.5 MHz 150ec21e2ecSJeff Kirsher * Note that only 6 bits (25:30) are available for MII speed. 151ec21e2ecSJeff Kirsher */ 152ec21e2ecSJeff Kirsher speed = (clock + 4999999) / 5000000; 153ec21e2ecSJeff Kirsher if (speed > 0x3F) { 154ec21e2ecSJeff Kirsher speed = 0x3F; 155ec21e2ecSJeff Kirsher dev_err(&ofdev->dev, 156ec21e2ecSJeff Kirsher "MII clock (%d Hz) exceeds max (2.5 MHz)\n", 157ec21e2ecSJeff Kirsher clock / speed); 158ec21e2ecSJeff Kirsher } 159ec21e2ecSJeff Kirsher 160ec21e2ecSJeff Kirsher fec->mii_speed = speed << 1; 161ec21e2ecSJeff Kirsher 162ec21e2ecSJeff Kirsher setbits32(&fec->fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE); 163ec21e2ecSJeff Kirsher setbits32(&fec->fecp->fec_ecntrl, FEC_ECNTRL_PINMUX | 164ec21e2ecSJeff Kirsher FEC_ECNTRL_ETHER_EN); 165ec21e2ecSJeff Kirsher out_be32(&fec->fecp->fec_ievent, FEC_ENET_MII); 166ec21e2ecSJeff Kirsher clrsetbits_be32(&fec->fecp->fec_mii_speed, 0x7E, fec->mii_speed); 167ec21e2ecSJeff Kirsher 168ec21e2ecSJeff Kirsher new_bus->phy_mask = ~0; 169ec21e2ecSJeff Kirsher 170ec21e2ecSJeff Kirsher new_bus->parent = &ofdev->dev; 1718513fbd8SJingoo Han platform_set_drvdata(ofdev, new_bus); 172ec21e2ecSJeff Kirsher 173ec21e2ecSJeff Kirsher ret = of_mdiobus_register(new_bus, ofdev->dev.of_node); 174ec21e2ecSJeff Kirsher if (ret) 175e7f4dc35SAndrew Lunn goto out_unmap_regs; 176ec21e2ecSJeff Kirsher 177ec21e2ecSJeff Kirsher return 0; 178ec21e2ecSJeff Kirsher 179ec21e2ecSJeff Kirsher out_unmap_regs: 180ec21e2ecSJeff Kirsher iounmap(fec->fecp); 181ec21e2ecSJeff Kirsher out_res: 182ec21e2ecSJeff Kirsher out_fec: 183ec21e2ecSJeff Kirsher kfree(fec); 184ec21e2ecSJeff Kirsher out_mii: 185ec21e2ecSJeff Kirsher mdiobus_free(new_bus); 186ec21e2ecSJeff Kirsher out: 187ec21e2ecSJeff Kirsher return ret; 188ec21e2ecSJeff Kirsher } 189ec21e2ecSJeff Kirsher 190ec21e2ecSJeff Kirsher static int fs_enet_mdio_remove(struct platform_device *ofdev) 191ec21e2ecSJeff Kirsher { 1928513fbd8SJingoo Han struct mii_bus *bus = platform_get_drvdata(ofdev); 193ec21e2ecSJeff Kirsher struct fec_info *fec = bus->priv; 194ec21e2ecSJeff Kirsher 195ec21e2ecSJeff Kirsher mdiobus_unregister(bus); 196ec21e2ecSJeff Kirsher iounmap(fec->fecp); 197ec21e2ecSJeff Kirsher kfree(fec); 198ec21e2ecSJeff Kirsher mdiobus_free(bus); 199ec21e2ecSJeff Kirsher 200ec21e2ecSJeff Kirsher return 0; 201ec21e2ecSJeff Kirsher } 202ec21e2ecSJeff Kirsher 20394e5a2a8SFabian Frederick static const struct of_device_id fs_enet_mdio_fec_match[] = { 204ec21e2ecSJeff Kirsher { 205ec21e2ecSJeff Kirsher .compatible = "fsl,pq1-fec-mdio", 206ec21e2ecSJeff Kirsher }, 207ec21e2ecSJeff Kirsher #if defined(CONFIG_PPC_MPC512x) 208ec21e2ecSJeff Kirsher { 209ec21e2ecSJeff Kirsher .compatible = "fsl,mpc5121-fec-mdio", 210ec21e2ecSJeff Kirsher .data = mpc5xxx_get_bus_frequency, 211ec21e2ecSJeff Kirsher }, 212ec21e2ecSJeff Kirsher #endif 213ec21e2ecSJeff Kirsher {}, 214ec21e2ecSJeff Kirsher }; 215ec21e2ecSJeff Kirsher MODULE_DEVICE_TABLE(of, fs_enet_mdio_fec_match); 216ec21e2ecSJeff Kirsher 217ec21e2ecSJeff Kirsher static struct platform_driver fs_enet_fec_mdio_driver = { 218ec21e2ecSJeff Kirsher .driver = { 219ec21e2ecSJeff Kirsher .name = "fsl-fec-mdio", 220ec21e2ecSJeff Kirsher .of_match_table = fs_enet_mdio_fec_match, 221ec21e2ecSJeff Kirsher }, 222ec21e2ecSJeff Kirsher .probe = fs_enet_mdio_probe, 223ec21e2ecSJeff Kirsher .remove = fs_enet_mdio_remove, 224ec21e2ecSJeff Kirsher }; 225ec21e2ecSJeff Kirsher 226db62f684SAxel Lin module_platform_driver(fs_enet_fec_mdio_driver); 227*445c6198SMichael Ellerman MODULE_LICENSE("GPL"); 228