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/init.h> 25ec21e2ecSJeff Kirsher #include <linux/delay.h> 26ec21e2ecSJeff Kirsher #include <linux/netdevice.h> 27ec21e2ecSJeff Kirsher #include <linux/etherdevice.h> 28ec21e2ecSJeff Kirsher #include <linux/skbuff.h> 29ec21e2ecSJeff Kirsher #include <linux/spinlock.h> 30ec21e2ecSJeff Kirsher #include <linux/mii.h> 31ec21e2ecSJeff Kirsher #include <linux/ethtool.h> 32ec21e2ecSJeff Kirsher #include <linux/bitops.h> 33ec21e2ecSJeff Kirsher #include <linux/platform_device.h> 34ec21e2ecSJeff Kirsher #include <linux/of_platform.h> 35ec21e2ecSJeff Kirsher 36ec21e2ecSJeff Kirsher #include <asm/pgtable.h> 37ec21e2ecSJeff Kirsher #include <asm/irq.h> 38ec21e2ecSJeff Kirsher #include <asm/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 98ec21e2ecSJeff Kirsher static int fs_enet_fec_mii_reset(struct mii_bus *bus) 99ec21e2ecSJeff Kirsher { 100ec21e2ecSJeff Kirsher /* nothing here - for now */ 101ec21e2ecSJeff Kirsher return 0; 102ec21e2ecSJeff Kirsher } 103ec21e2ecSJeff Kirsher 104ec21e2ecSJeff Kirsher static struct of_device_id fs_enet_mdio_fec_match[]; 105ec21e2ecSJeff Kirsher static int __devinit fs_enet_mdio_probe(struct platform_device *ofdev) 106ec21e2ecSJeff Kirsher { 107ec21e2ecSJeff Kirsher const struct of_device_id *match; 108ec21e2ecSJeff Kirsher struct resource res; 109ec21e2ecSJeff Kirsher struct mii_bus *new_bus; 110ec21e2ecSJeff Kirsher struct fec_info *fec; 111ec21e2ecSJeff Kirsher int (*get_bus_freq)(struct device_node *); 112ec21e2ecSJeff Kirsher int ret = -ENOMEM, clock, speed; 113ec21e2ecSJeff Kirsher 114ec21e2ecSJeff Kirsher match = of_match_device(fs_enet_mdio_fec_match, &ofdev->dev); 115ec21e2ecSJeff Kirsher if (!match) 116ec21e2ecSJeff Kirsher return -EINVAL; 117ec21e2ecSJeff Kirsher get_bus_freq = match->data; 118ec21e2ecSJeff Kirsher 119ec21e2ecSJeff Kirsher new_bus = mdiobus_alloc(); 120ec21e2ecSJeff Kirsher if (!new_bus) 121ec21e2ecSJeff Kirsher goto out; 122ec21e2ecSJeff Kirsher 123ec21e2ecSJeff Kirsher fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL); 124ec21e2ecSJeff Kirsher if (!fec) 125ec21e2ecSJeff Kirsher goto out_mii; 126ec21e2ecSJeff Kirsher 127ec21e2ecSJeff Kirsher new_bus->priv = fec; 128ec21e2ecSJeff Kirsher new_bus->name = "FEC MII Bus"; 129ec21e2ecSJeff Kirsher new_bus->read = &fs_enet_fec_mii_read; 130ec21e2ecSJeff Kirsher new_bus->write = &fs_enet_fec_mii_write; 131ec21e2ecSJeff Kirsher new_bus->reset = &fs_enet_fec_mii_reset; 132ec21e2ecSJeff Kirsher 133ec21e2ecSJeff Kirsher ret = of_address_to_resource(ofdev->dev.of_node, 0, &res); 134ec21e2ecSJeff Kirsher if (ret) 135ec21e2ecSJeff Kirsher goto out_res; 136ec21e2ecSJeff Kirsher 137ec21e2ecSJeff Kirsher snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", res.start); 138ec21e2ecSJeff Kirsher 139ec21e2ecSJeff Kirsher fec->fecp = ioremap(res.start, resource_size(&res)); 140ec21e2ecSJeff Kirsher if (!fec->fecp) 141ec21e2ecSJeff Kirsher goto out_fec; 142ec21e2ecSJeff Kirsher 143ec21e2ecSJeff Kirsher if (get_bus_freq) { 144ec21e2ecSJeff Kirsher clock = get_bus_freq(ofdev->dev.of_node); 145ec21e2ecSJeff Kirsher if (!clock) { 146ec21e2ecSJeff Kirsher /* Use maximum divider if clock is unknown */ 147ec21e2ecSJeff Kirsher dev_warn(&ofdev->dev, "could not determine IPS clock\n"); 148ec21e2ecSJeff Kirsher clock = 0x3F * 5000000; 149ec21e2ecSJeff Kirsher } 150ec21e2ecSJeff Kirsher } else 151ec21e2ecSJeff Kirsher clock = ppc_proc_freq; 152ec21e2ecSJeff Kirsher 153ec21e2ecSJeff Kirsher /* 154ec21e2ecSJeff Kirsher * Scale for a MII clock <= 2.5 MHz 155ec21e2ecSJeff Kirsher * Note that only 6 bits (25:30) are available for MII speed. 156ec21e2ecSJeff Kirsher */ 157ec21e2ecSJeff Kirsher speed = (clock + 4999999) / 5000000; 158ec21e2ecSJeff Kirsher if (speed > 0x3F) { 159ec21e2ecSJeff Kirsher speed = 0x3F; 160ec21e2ecSJeff Kirsher dev_err(&ofdev->dev, 161ec21e2ecSJeff Kirsher "MII clock (%d Hz) exceeds max (2.5 MHz)\n", 162ec21e2ecSJeff Kirsher clock / speed); 163ec21e2ecSJeff Kirsher } 164ec21e2ecSJeff Kirsher 165ec21e2ecSJeff Kirsher fec->mii_speed = speed << 1; 166ec21e2ecSJeff Kirsher 167ec21e2ecSJeff Kirsher setbits32(&fec->fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE); 168ec21e2ecSJeff Kirsher setbits32(&fec->fecp->fec_ecntrl, FEC_ECNTRL_PINMUX | 169ec21e2ecSJeff Kirsher FEC_ECNTRL_ETHER_EN); 170ec21e2ecSJeff Kirsher out_be32(&fec->fecp->fec_ievent, FEC_ENET_MII); 171ec21e2ecSJeff Kirsher clrsetbits_be32(&fec->fecp->fec_mii_speed, 0x7E, fec->mii_speed); 172ec21e2ecSJeff Kirsher 173ec21e2ecSJeff Kirsher new_bus->phy_mask = ~0; 174ec21e2ecSJeff Kirsher new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL); 175ec21e2ecSJeff Kirsher if (!new_bus->irq) 176ec21e2ecSJeff Kirsher goto out_unmap_regs; 177ec21e2ecSJeff Kirsher 178ec21e2ecSJeff Kirsher new_bus->parent = &ofdev->dev; 179ec21e2ecSJeff Kirsher dev_set_drvdata(&ofdev->dev, new_bus); 180ec21e2ecSJeff Kirsher 181ec21e2ecSJeff Kirsher ret = of_mdiobus_register(new_bus, ofdev->dev.of_node); 182ec21e2ecSJeff Kirsher if (ret) 183ec21e2ecSJeff Kirsher goto out_free_irqs; 184ec21e2ecSJeff Kirsher 185ec21e2ecSJeff Kirsher return 0; 186ec21e2ecSJeff Kirsher 187ec21e2ecSJeff Kirsher out_free_irqs: 188ec21e2ecSJeff Kirsher dev_set_drvdata(&ofdev->dev, NULL); 189ec21e2ecSJeff Kirsher kfree(new_bus->irq); 190ec21e2ecSJeff Kirsher out_unmap_regs: 191ec21e2ecSJeff Kirsher iounmap(fec->fecp); 192ec21e2ecSJeff Kirsher out_res: 193ec21e2ecSJeff Kirsher out_fec: 194ec21e2ecSJeff Kirsher kfree(fec); 195ec21e2ecSJeff Kirsher out_mii: 196ec21e2ecSJeff Kirsher mdiobus_free(new_bus); 197ec21e2ecSJeff Kirsher out: 198ec21e2ecSJeff Kirsher return ret; 199ec21e2ecSJeff Kirsher } 200ec21e2ecSJeff Kirsher 201ec21e2ecSJeff Kirsher static int fs_enet_mdio_remove(struct platform_device *ofdev) 202ec21e2ecSJeff Kirsher { 203ec21e2ecSJeff Kirsher struct mii_bus *bus = dev_get_drvdata(&ofdev->dev); 204ec21e2ecSJeff Kirsher struct fec_info *fec = bus->priv; 205ec21e2ecSJeff Kirsher 206ec21e2ecSJeff Kirsher mdiobus_unregister(bus); 207ec21e2ecSJeff Kirsher dev_set_drvdata(&ofdev->dev, NULL); 208ec21e2ecSJeff Kirsher kfree(bus->irq); 209ec21e2ecSJeff Kirsher iounmap(fec->fecp); 210ec21e2ecSJeff Kirsher kfree(fec); 211ec21e2ecSJeff Kirsher mdiobus_free(bus); 212ec21e2ecSJeff Kirsher 213ec21e2ecSJeff Kirsher return 0; 214ec21e2ecSJeff Kirsher } 215ec21e2ecSJeff Kirsher 216ec21e2ecSJeff Kirsher static struct of_device_id fs_enet_mdio_fec_match[] = { 217ec21e2ecSJeff Kirsher { 218ec21e2ecSJeff Kirsher .compatible = "fsl,pq1-fec-mdio", 219ec21e2ecSJeff Kirsher }, 220ec21e2ecSJeff Kirsher #if defined(CONFIG_PPC_MPC512x) 221ec21e2ecSJeff Kirsher { 222ec21e2ecSJeff Kirsher .compatible = "fsl,mpc5121-fec-mdio", 223ec21e2ecSJeff Kirsher .data = mpc5xxx_get_bus_frequency, 224ec21e2ecSJeff Kirsher }, 225ec21e2ecSJeff Kirsher #endif 226ec21e2ecSJeff Kirsher {}, 227ec21e2ecSJeff Kirsher }; 228ec21e2ecSJeff Kirsher MODULE_DEVICE_TABLE(of, fs_enet_mdio_fec_match); 229ec21e2ecSJeff Kirsher 230ec21e2ecSJeff Kirsher static struct platform_driver fs_enet_fec_mdio_driver = { 231ec21e2ecSJeff Kirsher .driver = { 232ec21e2ecSJeff Kirsher .name = "fsl-fec-mdio", 233ec21e2ecSJeff Kirsher .owner = THIS_MODULE, 234ec21e2ecSJeff Kirsher .of_match_table = fs_enet_mdio_fec_match, 235ec21e2ecSJeff Kirsher }, 236ec21e2ecSJeff Kirsher .probe = fs_enet_mdio_probe, 237ec21e2ecSJeff Kirsher .remove = fs_enet_mdio_remove, 238ec21e2ecSJeff Kirsher }; 239ec21e2ecSJeff Kirsher 240ec21e2ecSJeff Kirsher static int fs_enet_mdio_fec_init(void) 241ec21e2ecSJeff Kirsher { 242ec21e2ecSJeff Kirsher return platform_driver_register(&fs_enet_fec_mdio_driver); 243ec21e2ecSJeff Kirsher } 244ec21e2ecSJeff Kirsher 245ec21e2ecSJeff Kirsher static void fs_enet_mdio_fec_exit(void) 246ec21e2ecSJeff Kirsher { 247ec21e2ecSJeff Kirsher platform_driver_unregister(&fs_enet_fec_mdio_driver); 248ec21e2ecSJeff Kirsher } 249ec21e2ecSJeff Kirsher 250ec21e2ecSJeff Kirsher module_init(fs_enet_mdio_fec_init); 251ec21e2ecSJeff Kirsher module_exit(fs_enet_mdio_fec_exit); 252