hydra.c 7.3 KB

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  1. /* New Hydra driver using generic 8390 core */
  2. /* Based on old hydra driver by Topi Kanerva (topi@susanna.oulu.fi) */
  3. /* This file is subject to the terms and conditions of the GNU General */
  4. /* Public License. See the file COPYING in the main directory of the */
  5. /* Linux distribution for more details. */
  6. /* Peter De Schrijver (p2@mind.be) */
  7. /* Oldenburg 2000 */
  8. /* The Amiganet is a Zorro-II board made by Hydra Systems. It contains a */
  9. /* NS8390 NIC (network interface controller) clone, 16 or 64K on-board RAM */
  10. /* and 10BASE-2 (thin coax) and AUI connectors. */
  11. #include <linux/module.h>
  12. #include <linux/kernel.h>
  13. #include <linux/string.h>
  14. #include <linux/errno.h>
  15. #include <linux/ioport.h>
  16. #include <linux/slab.h>
  17. #include <linux/interrupt.h>
  18. #include <linux/netdevice.h>
  19. #include <linux/etherdevice.h>
  20. #include <linux/skbuff.h>
  21. #include <linux/init.h>
  22. #include <linux/bitops.h>
  23. #include <asm/io.h>
  24. #include <asm/irq.h>
  25. #include <asm/amigaints.h>
  26. #include <asm/amigahw.h>
  27. #include <linux/zorro.h>
  28. #define EI_SHIFT(x) (ei_local->reg_offset[x])
  29. #define ei_inb(port) in_8(port)
  30. #define ei_outb(val,port) out_8(port,val)
  31. #define ei_inb_p(port) in_8(port)
  32. #define ei_outb_p(val,port) out_8(port,val)
  33. static const char version[] =
  34. "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
  35. #include "lib8390.c"
  36. #define NE_EN0_DCFG (0x0e*2)
  37. #define NESM_START_PG 0x0 /* First page of TX buffer */
  38. #define NESM_STOP_PG 0x40 /* Last page +1 of RX ring */
  39. #define HYDRA_NIC_BASE 0xffe1
  40. #define HYDRA_ADDRPROM 0xffc0
  41. #define HYDRA_VERSION "v3.0alpha"
  42. #define WORDSWAP(a) ((((a)>>8)&0xff) | ((a)<<8))
  43. static int __devinit hydra_init_one(struct zorro_dev *z,
  44. const struct zorro_device_id *ent);
  45. static int __devinit hydra_init(struct zorro_dev *z);
  46. static int hydra_open(struct net_device *dev);
  47. static int hydra_close(struct net_device *dev);
  48. static void hydra_reset_8390(struct net_device *dev);
  49. static void hydra_get_8390_hdr(struct net_device *dev,
  50. struct e8390_pkt_hdr *hdr, int ring_page);
  51. static void hydra_block_input(struct net_device *dev, int count,
  52. struct sk_buff *skb, int ring_offset);
  53. static void hydra_block_output(struct net_device *dev, int count,
  54. const unsigned char *buf, int start_page);
  55. static void __devexit hydra_remove_one(struct zorro_dev *z);
  56. static struct zorro_device_id hydra_zorro_tbl[] __devinitdata = {
  57. { ZORRO_PROD_HYDRA_SYSTEMS_AMIGANET },
  58. { 0 }
  59. };
  60. static struct zorro_driver hydra_driver = {
  61. .name = "hydra",
  62. .id_table = hydra_zorro_tbl,
  63. .probe = hydra_init_one,
  64. .remove = __devexit_p(hydra_remove_one),
  65. };
  66. static int __devinit hydra_init_one(struct zorro_dev *z,
  67. const struct zorro_device_id *ent)
  68. {
  69. int err;
  70. if (!request_mem_region(z->resource.start, 0x10000, "Hydra"))
  71. return -EBUSY;
  72. if ((err = hydra_init(z))) {
  73. release_mem_region(z->resource.start, 0x10000);
  74. return -EBUSY;
  75. }
  76. return 0;
  77. }
  78. static int __devinit hydra_init(struct zorro_dev *z)
  79. {
  80. struct net_device *dev;
  81. unsigned long board = ZTWO_VADDR(z->resource.start);
  82. unsigned long ioaddr = board+HYDRA_NIC_BASE;
  83. const char name[] = "NE2000";
  84. int start_page, stop_page;
  85. int j;
  86. int err;
  87. static u32 hydra_offsets[16] = {
  88. 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
  89. 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
  90. };
  91. dev = ____alloc_ei_netdev(0);
  92. if (!dev)
  93. return -ENOMEM;
  94. SET_MODULE_OWNER(dev);
  95. for(j = 0; j < ETHER_ADDR_LEN; j++)
  96. dev->dev_addr[j] = *((u8 *)(board + HYDRA_ADDRPROM + 2*j));
  97. /* We must set the 8390 for word mode. */
  98. z_writeb(0x4b, ioaddr + NE_EN0_DCFG);
  99. start_page = NESM_START_PG;
  100. stop_page = NESM_STOP_PG;
  101. dev->base_addr = ioaddr;
  102. dev->irq = IRQ_AMIGA_PORTS;
  103. /* Install the Interrupt handler */
  104. if (request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, "Hydra Ethernet",
  105. dev)) {
  106. free_netdev(dev);
  107. return -EAGAIN;
  108. }
  109. ei_status.name = name;
  110. ei_status.tx_start_page = start_page;
  111. ei_status.stop_page = stop_page;
  112. ei_status.word16 = 1;
  113. ei_status.bigendian = 1;
  114. ei_status.rx_start_page = start_page + TX_PAGES;
  115. ei_status.reset_8390 = &hydra_reset_8390;
  116. ei_status.block_input = &hydra_block_input;
  117. ei_status.block_output = &hydra_block_output;
  118. ei_status.get_8390_hdr = &hydra_get_8390_hdr;
  119. ei_status.reg_offset = hydra_offsets;
  120. dev->open = &hydra_open;
  121. dev->stop = &hydra_close;
  122. #ifdef CONFIG_NET_POLL_CONTROLLER
  123. dev->poll_controller = __ei_poll;
  124. #endif
  125. __NS8390_init(dev, 0);
  126. err = register_netdev(dev);
  127. if (err) {
  128. free_irq(IRQ_AMIGA_PORTS, dev);
  129. free_netdev(dev);
  130. return err;
  131. }
  132. zorro_set_drvdata(z, dev);
  133. printk(KERN_INFO "%s: Hydra at 0x%08lx, address "
  134. "%02x:%02x:%02x:%02x:%02x:%02x (hydra.c " HYDRA_VERSION ")\n",
  135. dev->name, z->resource.start, dev->dev_addr[0], dev->dev_addr[1],
  136. dev->dev_addr[2], dev->dev_addr[3], dev->dev_addr[4],
  137. dev->dev_addr[5]);
  138. return 0;
  139. }
  140. static int hydra_open(struct net_device *dev)
  141. {
  142. __ei_open(dev);
  143. return 0;
  144. }
  145. static int hydra_close(struct net_device *dev)
  146. {
  147. if (ei_debug > 1)
  148. printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
  149. __ei_close(dev);
  150. return 0;
  151. }
  152. static void hydra_reset_8390(struct net_device *dev)
  153. {
  154. printk(KERN_INFO "Hydra hw reset not there\n");
  155. }
  156. static void hydra_get_8390_hdr(struct net_device *dev,
  157. struct e8390_pkt_hdr *hdr, int ring_page)
  158. {
  159. int nic_base = dev->base_addr;
  160. short *ptrs;
  161. unsigned long hdr_start= (nic_base-HYDRA_NIC_BASE) +
  162. ((ring_page - NESM_START_PG)<<8);
  163. ptrs = (short *)hdr;
  164. *(ptrs++) = z_readw(hdr_start);
  165. *((short *)hdr) = WORDSWAP(*((short *)hdr));
  166. hdr_start += 2;
  167. *(ptrs++) = z_readw(hdr_start);
  168. *((short *)hdr+1) = WORDSWAP(*((short *)hdr+1));
  169. }
  170. static void hydra_block_input(struct net_device *dev, int count,
  171. struct sk_buff *skb, int ring_offset)
  172. {
  173. unsigned long nic_base = dev->base_addr;
  174. unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
  175. unsigned long xfer_start = mem_base + ring_offset - (NESM_START_PG<<8);
  176. if (count&1)
  177. count++;
  178. if (xfer_start+count > mem_base + (NESM_STOP_PG<<8)) {
  179. int semi_count = (mem_base + (NESM_STOP_PG<<8)) - xfer_start;
  180. z_memcpy_fromio(skb->data,xfer_start,semi_count);
  181. count -= semi_count;
  182. z_memcpy_fromio(skb->data+semi_count, mem_base, count);
  183. } else
  184. z_memcpy_fromio(skb->data, xfer_start,count);
  185. }
  186. static void hydra_block_output(struct net_device *dev, int count,
  187. const unsigned char *buf, int start_page)
  188. {
  189. unsigned long nic_base = dev->base_addr;
  190. unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
  191. if (count&1)
  192. count++;
  193. z_memcpy_toio(mem_base+((start_page - NESM_START_PG)<<8), buf, count);
  194. }
  195. static void __devexit hydra_remove_one(struct zorro_dev *z)
  196. {
  197. struct net_device *dev = zorro_get_drvdata(z);
  198. unregister_netdev(dev);
  199. free_irq(IRQ_AMIGA_PORTS, dev);
  200. release_mem_region(ZTWO_PADDR(dev->base_addr)-HYDRA_NIC_BASE, 0x10000);
  201. free_netdev(dev);
  202. }
  203. static int __init hydra_init_module(void)
  204. {
  205. return zorro_register_driver(&hydra_driver);
  206. }
  207. static void __exit hydra_cleanup_module(void)
  208. {
  209. zorro_unregister_driver(&hydra_driver);
  210. }
  211. module_init(hydra_init_module);
  212. module_exit(hydra_cleanup_module);
  213. MODULE_LICENSE("GPL");