plb2800_eth.c 7.2 KB

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  1. /*
  2. * PLB2800 internal switch ethernet driver.
  3. *
  4. * (C) Copyright 2003
  5. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  6. *
  7. * SPDX-License-Identifier: GPL-2.0+
  8. */
  9. #include <common.h>
  10. #include <malloc.h>
  11. #include <net.h>
  12. #include <netdev.h>
  13. #include <asm/addrspace.h>
  14. #define NUM_RX_DESC PKTBUFSRX
  15. #define TOUT_LOOP 1000000
  16. #define LONG_REF(addr) (*((volatile unsigned long*)addr))
  17. #define CMAC_CRX_CTRL LONG_REF(0xb800c870)
  18. #define CMAC_CTX_CTRL LONG_REF(0xb800c874)
  19. #define SYS_MAC_ADDR_0 LONG_REF(0xb800c878)
  20. #define SYS_MAC_ADDR_1 LONG_REF(0xb800c87c)
  21. #define MIPS_H_MASK LONG_REF(0xB800C810)
  22. #define MA_LEARN LONG_REF(0xb8008004)
  23. #define DA_LOOKUP LONG_REF(0xb8008008)
  24. #define CMAC_CRX_CTRL_PD 0x00000001
  25. #define CMAC_CRX_CTRL_CG 0x00000002
  26. #define CMAC_CRX_CTRL_PL_SHIFT 2
  27. #define CMAC_CRIT 0x0
  28. #define CMAC_NON_CRIT 0x1
  29. #define MBOX_STAT_ID_SHF 28
  30. #define MBOX_STAT_CP 0x80000000
  31. #define MBOX_STAT_MB 0x00000001
  32. #define EN_MA_LEARN 0x02000000
  33. #define EN_DA_LKUP 0x01000000
  34. #define MA_DEST_SHF 11
  35. #define DA_DEST_SHF 11
  36. #define DA_STATE_SHF 19
  37. #define TSTAMP_MS 0x00000000
  38. #define SW_H_MBOX4_MASK 0x08000000
  39. #define SW_H_MBOX3_MASK 0x04000000
  40. #define SW_H_MBOX2_MASK 0x02000000
  41. #define SW_H_MBOX1_MASK 0x01000000
  42. typedef volatile struct {
  43. unsigned int stat;
  44. unsigned int cmd;
  45. unsigned int cnt;
  46. unsigned int adr;
  47. } mailbox_t;
  48. #define MBOX_REG(mb) ((mailbox_t*)(0xb800c830+(mb<<4)))
  49. typedef volatile struct {
  50. unsigned int word0;
  51. unsigned int word1;
  52. unsigned int word2;
  53. } mbhdr_t;
  54. #define MBOX_MEM(mb) ((void*)(0xb800a000+((3-mb)<<11)))
  55. static int plb2800_eth_init(struct eth_device *dev, bd_t * bis);
  56. static int plb2800_eth_send(struct eth_device *dev, void *packet, int length);
  57. static int plb2800_eth_recv(struct eth_device *dev);
  58. static void plb2800_eth_halt(struct eth_device *dev);
  59. static void plb2800_set_mac_addr(struct eth_device *dev, unsigned char * addr);
  60. static unsigned char * plb2800_get_mac_addr(void);
  61. static int rx_new;
  62. static int mac_addr_set = 0;
  63. int plb2800_eth_initialize(bd_t * bis)
  64. {
  65. struct eth_device *dev;
  66. ulong temp;
  67. #ifdef DEBUG
  68. printf("Entered plb2800_eth_initialize()\n");
  69. #endif
  70. if (!(dev = (struct eth_device *) malloc (sizeof *dev)))
  71. {
  72. printf("Failed to allocate memory\n");
  73. return -1;
  74. }
  75. memset(dev, 0, sizeof(*dev));
  76. sprintf(dev->name, "PLB2800 Switch");
  77. dev->init = plb2800_eth_init;
  78. dev->halt = plb2800_eth_halt;
  79. dev->send = plb2800_eth_send;
  80. dev->recv = plb2800_eth_recv;
  81. eth_register(dev);
  82. /* bug fix */
  83. *(ulong *)0xb800e800 = 0x838;
  84. /* Set MBOX ownership */
  85. temp = CMAC_CRIT << MBOX_STAT_ID_SHF;
  86. MBOX_REG(0)->stat = temp;
  87. MBOX_REG(1)->stat = temp;
  88. temp = CMAC_NON_CRIT << MBOX_STAT_ID_SHF;
  89. MBOX_REG(2)->stat = temp;
  90. MBOX_REG(3)->stat = temp;
  91. plb2800_set_mac_addr(dev, plb2800_get_mac_addr());
  92. /* Disable all Mbox interrupt */
  93. temp = MIPS_H_MASK;
  94. temp &= ~ (SW_H_MBOX1_MASK | SW_H_MBOX2_MASK | SW_H_MBOX3_MASK | SW_H_MBOX4_MASK) ;
  95. MIPS_H_MASK = temp;
  96. #ifdef DEBUG
  97. printf("Leaving plb2800_eth_initialize()\n");
  98. #endif
  99. return 0;
  100. }
  101. static int plb2800_eth_init(struct eth_device *dev, bd_t * bis)
  102. {
  103. #ifdef DEBUG
  104. printf("Entering plb2800_eth_init()\n");
  105. #endif
  106. plb2800_set_mac_addr(dev, dev->enetaddr);
  107. rx_new = 0;
  108. #ifdef DEBUG
  109. printf("Leaving plb2800_eth_init()\n");
  110. #endif
  111. return 0;
  112. }
  113. static int plb2800_eth_send(struct eth_device *dev, void *packet, int length)
  114. {
  115. int i;
  116. int res = -1;
  117. u32 temp;
  118. mailbox_t * mb = MBOX_REG(0);
  119. char * mem = MBOX_MEM(0);
  120. #ifdef DEBUG
  121. printf("Entered plb2800_eth_send()\n");
  122. #endif
  123. if (length <= 0)
  124. {
  125. printf ("%s: bad packet size: %d\n", dev->name, length);
  126. goto Done;
  127. }
  128. if (length < 64)
  129. {
  130. length = 64;
  131. }
  132. temp = CMAC_CRX_CTRL_CG | ((length + 4) << CMAC_CRX_CTRL_PL_SHIFT);
  133. #ifdef DEBUG
  134. printf("0 mb->stat = 0x%x\n", mb->stat);
  135. #endif
  136. for(i = 0; mb->stat & (MBOX_STAT_CP | MBOX_STAT_MB); i++)
  137. {
  138. if (i >= TOUT_LOOP)
  139. {
  140. printf("%s: tx buffer not ready\n", dev->name);
  141. printf("1 mb->stat = 0x%x\n", mb->stat);
  142. goto Done;
  143. }
  144. }
  145. /* For some strange reason, memcpy doesn't work, here!
  146. */
  147. do
  148. {
  149. int words = (length >> 2) + 1;
  150. unsigned int* dst = (unsigned int*)(mem);
  151. unsigned int* src = (unsigned int*)(packet);
  152. for (i = 0; i < words; i++)
  153. {
  154. *dst = *src;
  155. dst++;
  156. src++;
  157. };
  158. } while(0);
  159. CMAC_CRX_CTRL = temp;
  160. mb->cmd = MBOX_STAT_CP;
  161. #ifdef DEBUG
  162. printf("2 mb->stat = 0x%x\n", mb->stat);
  163. #endif
  164. res = length;
  165. Done:
  166. #ifdef DEBUG
  167. printf("Leaving plb2800_eth_send()\n");
  168. #endif
  169. return res;
  170. }
  171. static int plb2800_eth_recv(struct eth_device *dev)
  172. {
  173. int length = 0;
  174. mailbox_t * mbox = MBOX_REG(3);
  175. unsigned char * hdr = MBOX_MEM(3);
  176. unsigned int stat;
  177. #ifdef DEBUG
  178. printf("Entered plb2800_eth_recv()\n");
  179. #endif
  180. for (;;)
  181. {
  182. stat = mbox->stat;
  183. if (!(stat & MBOX_STAT_CP))
  184. {
  185. break;
  186. }
  187. length = ((*(hdr + 6) & 0x3f) << 8) + *(hdr + 7);
  188. memcpy((void *)NetRxPackets[rx_new], hdr + 12, length);
  189. stat &= ~MBOX_STAT_CP;
  190. mbox->stat = stat;
  191. #ifdef DEBUG
  192. {
  193. int i;
  194. for (i=0;i<length - 4;i++)
  195. {
  196. if (i % 16 == 0) printf("\n%04x: ", i);
  197. printf("%02X ", NetRxPackets[rx_new][i]);
  198. }
  199. printf("\n");
  200. }
  201. #endif
  202. if (length)
  203. {
  204. #ifdef DEBUG
  205. printf("Received %d bytes\n", length);
  206. #endif
  207. NetReceive((void*)(NetRxPackets[rx_new]),
  208. length - 4);
  209. }
  210. else
  211. {
  212. #if 1
  213. printf("Zero length!!!\n");
  214. #endif
  215. }
  216. rx_new = (rx_new + 1) % NUM_RX_DESC;
  217. }
  218. #ifdef DEBUG
  219. printf("Leaving plb2800_eth_recv()\n");
  220. #endif
  221. return length;
  222. }
  223. static void plb2800_eth_halt(struct eth_device *dev)
  224. {
  225. #ifdef DEBUG
  226. printf("Entered plb2800_eth_halt()\n");
  227. #endif
  228. #ifdef DEBUG
  229. printf("Leaving plb2800_eth_halt()\n");
  230. #endif
  231. }
  232. static void plb2800_set_mac_addr(struct eth_device *dev, unsigned char * addr)
  233. {
  234. char packet[60];
  235. ulong temp;
  236. int ix;
  237. if (mac_addr_set ||
  238. NULL == addr || memcmp(addr, "\0\0\0\0\0\0", 6) == 0)
  239. {
  240. return;
  241. }
  242. /* send one packet through CPU port
  243. * in order to learn system MAC address
  244. */
  245. /* Set DA_LOOKUP register */
  246. temp = EN_MA_LEARN | (0 << DA_STATE_SHF) | (63 << DA_DEST_SHF);
  247. DA_LOOKUP = temp;
  248. /* Set MA_LEARN register */
  249. temp = 50 << MA_DEST_SHF; /* static entry */
  250. MA_LEARN = temp;
  251. /* set destination address */
  252. for (ix=0;ix<6;ix++)
  253. packet[ix] = 0xff;
  254. /* set source address = system MAC address */
  255. for (ix=0;ix<6;ix++)
  256. packet[6+ix] = addr[ix];
  257. /* set type field */
  258. packet[12]=0xaa;
  259. packet[13]=0x55;
  260. /* set data field */
  261. for(ix=14;ix<60;ix++)
  262. packet[ix] = 0x00;
  263. #ifdef DEBUG
  264. for (ix=0;ix<6;ix++)
  265. printf("mac_addr[%d]=%02X\n", ix, (unsigned char)packet[6+ix]);
  266. #endif
  267. /* set one packet */
  268. plb2800_eth_send(dev, packet, sizeof(packet));
  269. /* delay for a while */
  270. for(ix=0;ix<65535;ix++)
  271. temp = ~temp;
  272. /* Set CMAC_CTX_CTRL register */
  273. temp = TSTAMP_MS; /* no autocast */
  274. CMAC_CTX_CTRL = temp;
  275. /* Set DA_LOOKUP register */
  276. temp = EN_DA_LKUP;
  277. DA_LOOKUP = temp;
  278. mac_addr_set = 1;
  279. }
  280. static unsigned char * plb2800_get_mac_addr(void)
  281. {
  282. static unsigned char addr[6];
  283. char *tmp, *end;
  284. int i;
  285. tmp = getenv ("ethaddr");
  286. if (NULL == tmp) return NULL;
  287. for (i=0; i<6; i++) {
  288. addr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
  289. if (tmp)
  290. tmp = (*end) ? end+1 : end;
  291. }
  292. return addr;
  293. }