1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * jazzsonic.c 4 * 5 * (C) 2005 Finn Thain 6 * 7 * Converted to DMA API, and (from the mac68k project) introduced 8 * dhd's support for 16-bit cards. 9 * 10 * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de) 11 * 12 * This driver is based on work from Andreas Busse, but most of 13 * the code is rewritten. 14 * 15 * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de) 16 * 17 * A driver for the onboard Sonic ethernet controller on Mips Jazz 18 * systems (Acer Pica-61, Mips Magnum 4000, Olivetti M700 and 19 * perhaps others, too) 20 */ 21 22 #include <linux/kernel.h> 23 #include <linux/module.h> 24 #include <linux/types.h> 25 #include <linux/fcntl.h> 26 #include <linux/gfp.h> 27 #include <linux/interrupt.h> 28 #include <linux/ioport.h> 29 #include <linux/in.h> 30 #include <linux/string.h> 31 #include <linux/delay.h> 32 #include <linux/errno.h> 33 #include <linux/netdevice.h> 34 #include <linux/etherdevice.h> 35 #include <linux/skbuff.h> 36 #include <linux/platform_device.h> 37 #include <linux/dma-mapping.h> 38 #include <linux/slab.h> 39 #include <linux/pgtable.h> 40 41 #include <asm/bootinfo.h> 42 #include <asm/io.h> 43 #include <asm/dma.h> 44 #include <asm/jazz.h> 45 #include <asm/jazzdma.h> 46 47 static char jazz_sonic_string[] = "jazzsonic"; 48 49 #define SONIC_MEM_SIZE 0x100 50 51 #include "sonic.h" 52 53 /* 54 * Macros to access SONIC registers 55 */ 56 #define SONIC_READ(reg) (*((volatile unsigned int *)dev->base_addr+reg)) 57 58 #define SONIC_WRITE(reg,val) \ 59 do { \ 60 *((volatile unsigned int *)dev->base_addr+(reg)) = (val); \ 61 } while (0) 62 63 /* 64 * We cannot use station (ethernet) address prefixes to detect the 65 * sonic controller since these are board manufacturer depended. 66 * So we check for known Silicon Revision IDs instead. 67 */ 68 static unsigned short known_revisions[] = 69 { 70 0x04, /* Mips Magnum 4000 */ 71 0xffff /* end of list */ 72 }; 73 74 static int jazzsonic_open(struct net_device* dev) 75 { 76 int retval; 77 78 retval = request_irq(dev->irq, sonic_interrupt, 0, "sonic", dev); 79 if (retval) { 80 printk(KERN_ERR "%s: unable to get IRQ %d.\n", 81 dev->name, dev->irq); 82 return retval; 83 } 84 85 retval = sonic_open(dev); 86 if (retval) 87 free_irq(dev->irq, dev); 88 return retval; 89 } 90 91 static int jazzsonic_close(struct net_device* dev) 92 { 93 int err; 94 err = sonic_close(dev); 95 free_irq(dev->irq, dev); 96 return err; 97 } 98 99 static const struct net_device_ops sonic_netdev_ops = { 100 .ndo_open = jazzsonic_open, 101 .ndo_stop = jazzsonic_close, 102 .ndo_start_xmit = sonic_send_packet, 103 .ndo_get_stats = sonic_get_stats, 104 .ndo_set_rx_mode = sonic_multicast_list, 105 .ndo_tx_timeout = sonic_tx_timeout, 106 .ndo_validate_addr = eth_validate_addr, 107 .ndo_set_mac_address = eth_mac_addr, 108 }; 109 110 static int sonic_probe1(struct net_device *dev) 111 { 112 unsigned int silicon_revision; 113 unsigned int val; 114 struct sonic_local *lp = netdev_priv(dev); 115 int err = -ENODEV; 116 int i; 117 unsigned char addr[ETH_ALEN]; 118 119 if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string)) 120 return -EBUSY; 121 122 /* 123 * get the Silicon Revision ID. If this is one of the known 124 * one assume that we found a SONIC ethernet controller at 125 * the expected location. 126 */ 127 silicon_revision = SONIC_READ(SONIC_SR); 128 i = 0; 129 while (known_revisions[i] != 0xffff && 130 known_revisions[i] != silicon_revision) 131 i++; 132 133 if (known_revisions[i] == 0xffff) { 134 pr_info("SONIC ethernet controller not found (0x%4x)\n", 135 silicon_revision); 136 goto out; 137 } 138 139 /* 140 * Put the sonic into software reset, then 141 * retrieve and print the ethernet address. 142 */ 143 SONIC_WRITE(SONIC_CMD,SONIC_CR_RST); 144 SONIC_WRITE(SONIC_CEP,0); 145 for (i=0; i<3; i++) { 146 val = SONIC_READ(SONIC_CAP0-i); 147 addr[i*2] = val; 148 addr[i*2+1] = val >> 8; 149 } 150 eth_hw_addr_set(dev, addr); 151 152 lp->dma_bitmode = SONIC_BITMODE32; 153 154 err = sonic_alloc_descriptors(dev); 155 if (err) 156 goto out; 157 158 dev->netdev_ops = &sonic_netdev_ops; 159 dev->watchdog_timeo = TX_TIMEOUT; 160 161 /* 162 * clear tally counter 163 */ 164 SONIC_WRITE(SONIC_CRCT,0xffff); 165 SONIC_WRITE(SONIC_FAET,0xffff); 166 SONIC_WRITE(SONIC_MPT,0xffff); 167 168 return 0; 169 out: 170 release_mem_region(dev->base_addr, SONIC_MEM_SIZE); 171 return err; 172 } 173 174 /* 175 * Probe for a SONIC ethernet controller on a Mips Jazz board. 176 * Actually probing is superfluous but we're paranoid. 177 */ 178 static int jazz_sonic_probe(struct platform_device *pdev) 179 { 180 struct net_device *dev; 181 struct sonic_local *lp; 182 struct resource *res; 183 int err = 0; 184 185 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 186 if (!res) 187 return -ENODEV; 188 189 dev = alloc_etherdev(sizeof(struct sonic_local)); 190 if (!dev) 191 return -ENOMEM; 192 193 lp = netdev_priv(dev); 194 lp->device = &pdev->dev; 195 SET_NETDEV_DEV(dev, &pdev->dev); 196 platform_set_drvdata(pdev, dev); 197 198 dev->base_addr = res->start; 199 dev->irq = platform_get_irq(pdev, 0); 200 err = sonic_probe1(dev); 201 if (err) 202 goto out; 203 204 pr_info("SONIC ethernet @%08lx, MAC %pM, IRQ %d\n", 205 dev->base_addr, dev->dev_addr, dev->irq); 206 207 sonic_msg_init(dev); 208 209 err = register_netdev(dev); 210 if (err) 211 goto undo_probe1; 212 213 return 0; 214 215 undo_probe1: 216 dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), 217 lp->descriptors, lp->descriptors_laddr); 218 release_mem_region(dev->base_addr, SONIC_MEM_SIZE); 219 out: 220 free_netdev(dev); 221 222 return err; 223 } 224 225 MODULE_DESCRIPTION("Jazz SONIC ethernet driver"); 226 MODULE_ALIAS("platform:jazzsonic"); 227 228 #include "sonic.c" 229 230 static int jazz_sonic_device_remove(struct platform_device *pdev) 231 { 232 struct net_device *dev = platform_get_drvdata(pdev); 233 struct sonic_local* lp = netdev_priv(dev); 234 235 unregister_netdev(dev); 236 dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), 237 lp->descriptors, lp->descriptors_laddr); 238 release_mem_region(dev->base_addr, SONIC_MEM_SIZE); 239 free_netdev(dev); 240 241 return 0; 242 } 243 244 static struct platform_driver jazz_sonic_driver = { 245 .probe = jazz_sonic_probe, 246 .remove = jazz_sonic_device_remove, 247 .driver = { 248 .name = jazz_sonic_string, 249 }, 250 }; 251 252 module_platform_driver(jazz_sonic_driver); 253