au1000_db1x00.c 7.1 KB

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  1. /*
  2. *
  3. * Alchemy Semi Db1x00 boards specific pcmcia routines.
  4. *
  5. * Copyright 2002 MontaVista Software Inc.
  6. * Author: MontaVista Software, Inc.
  7. * ppopov@mvista.com or source@mvista.com
  8. *
  9. * Copyright 2004 Pete Popov, updated the driver to 2.6.
  10. * Followed the sa11xx API and largely copied many of the hardware
  11. * independent functions.
  12. *
  13. * ########################################################################
  14. *
  15. * This program is free software; you can distribute it and/or modify it
  16. * under the terms of the GNU General Public License (Version 2) as
  17. * published by the Free Software Foundation.
  18. *
  19. * This program is distributed in the hope it will be useful, but WITHOUT
  20. * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  21. * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  22. * for more details.
  23. *
  24. * You should have received a copy of the GNU General Public License along
  25. * with this program; if not, write to the Free Software Foundation, Inc.,
  26. * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  27. *
  28. * ########################################################################
  29. *
  30. *
  31. */
  32. #include <linux/module.h>
  33. #include <linux/kernel.h>
  34. #include <linux/errno.h>
  35. #include <linux/interrupt.h>
  36. #include <linux/device.h>
  37. #include <linux/init.h>
  38. #include <asm/irq.h>
  39. #include <asm/signal.h>
  40. #include <asm/mach-au1x00/au1000.h>
  41. #if defined(CONFIG_MIPS_DB1200)
  42. #include <db1200.h>
  43. #elif defined(CONFIG_MIPS_PB1200)
  44. #include <pb1200.h>
  45. #else
  46. #include <asm/mach-db1x00/db1x00.h>
  47. static BCSR * const bcsr = (BCSR *)BCSR_KSEG1_ADDR;
  48. #endif
  49. #include "au1000_generic.h"
  50. #if 0
  51. #define debug(x,args...) printk(KERN_DEBUG "%s: " x, __func__ , ##args)
  52. #else
  53. #define debug(x,args...)
  54. #endif
  55. struct au1000_pcmcia_socket au1000_pcmcia_socket[PCMCIA_NUM_SOCKS];
  56. extern int au1x00_pcmcia_socket_probe(struct device *, struct pcmcia_low_level *, int, int);
  57. static int db1x00_pcmcia_hw_init(struct au1000_pcmcia_socket *skt)
  58. {
  59. #ifdef CONFIG_MIPS_DB1550
  60. skt->irq = skt->nr ? AU1000_GPIO_5 : AU1000_GPIO_3;
  61. #elif defined(CONFIG_MIPS_DB1200) || defined(CONFIG_MIPS_PB1200)
  62. skt->irq = skt->nr ? BOARD_PC1_INT : BOARD_PC0_INT;
  63. #else
  64. skt->irq = skt->nr ? AU1000_GPIO_5 : AU1000_GPIO_2;
  65. #endif
  66. return 0;
  67. }
  68. static void db1x00_pcmcia_shutdown(struct au1000_pcmcia_socket *skt)
  69. {
  70. bcsr->pcmcia = 0; /* turn off power */
  71. au_sync_delay(2);
  72. }
  73. static void
  74. db1x00_pcmcia_socket_state(struct au1000_pcmcia_socket *skt, struct pcmcia_state *state)
  75. {
  76. u32 inserted;
  77. unsigned char vs;
  78. state->ready = 0;
  79. state->vs_Xv = 0;
  80. state->vs_3v = 0;
  81. state->detect = 0;
  82. switch (skt->nr) {
  83. case 0:
  84. vs = bcsr->status & 0x3;
  85. #if defined(CONFIG_MIPS_DB1200) || defined(CONFIG_MIPS_PB1200)
  86. inserted = BOARD_CARD_INSERTED(0);
  87. #else
  88. inserted = !(bcsr->status & (1<<4));
  89. #endif
  90. break;
  91. case 1:
  92. vs = (bcsr->status & 0xC)>>2;
  93. #if defined(CONFIG_MIPS_DB1200) || defined(CONFIG_MIPS_PB1200)
  94. inserted = BOARD_CARD_INSERTED(1);
  95. #else
  96. inserted = !(bcsr->status & (1<<5));
  97. #endif
  98. break;
  99. default:/* should never happen */
  100. return;
  101. }
  102. if (inserted)
  103. debug("db1x00 socket %d: inserted %d, vs %d pcmcia %x\n",
  104. skt->nr, inserted, vs, bcsr->pcmcia);
  105. if (inserted) {
  106. switch (vs) {
  107. case 0:
  108. case 2:
  109. state->vs_3v=1;
  110. break;
  111. case 3: /* 5V */
  112. break;
  113. default:
  114. /* return without setting 'detect' */
  115. printk(KERN_ERR "db1x00 bad VS (%d)\n",
  116. vs);
  117. }
  118. state->detect = 1;
  119. state->ready = 1;
  120. }
  121. else {
  122. /* if the card was previously inserted and then ejected,
  123. * we should turn off power to it
  124. */
  125. if ((skt->nr == 0) && (bcsr->pcmcia & BCSR_PCMCIA_PC0RST)) {
  126. bcsr->pcmcia &= ~(BCSR_PCMCIA_PC0RST |
  127. BCSR_PCMCIA_PC0DRVEN |
  128. BCSR_PCMCIA_PC0VPP |
  129. BCSR_PCMCIA_PC0VCC);
  130. au_sync_delay(10);
  131. }
  132. else if ((skt->nr == 1) && bcsr->pcmcia & BCSR_PCMCIA_PC1RST) {
  133. bcsr->pcmcia &= ~(BCSR_PCMCIA_PC1RST |
  134. BCSR_PCMCIA_PC1DRVEN |
  135. BCSR_PCMCIA_PC1VPP |
  136. BCSR_PCMCIA_PC1VCC);
  137. au_sync_delay(10);
  138. }
  139. }
  140. state->bvd1=1;
  141. state->bvd2=1;
  142. state->wrprot=0;
  143. }
  144. static int
  145. db1x00_pcmcia_configure_socket(struct au1000_pcmcia_socket *skt, struct socket_state_t *state)
  146. {
  147. u16 pwr;
  148. int sock = skt->nr;
  149. debug("config_skt %d Vcc %dV Vpp %dV, reset %d\n",
  150. sock, state->Vcc, state->Vpp,
  151. state->flags & SS_RESET);
  152. /* pcmcia reg was set to zero at init time. Be careful when
  153. * initializing a socket not to wipe out the settings of the
  154. * other socket.
  155. */
  156. pwr = bcsr->pcmcia;
  157. pwr &= ~(0xf << sock*8); /* clear voltage settings */
  158. state->Vpp = 0;
  159. switch(state->Vcc){
  160. case 0: /* Vcc 0 */
  161. pwr |= SET_VCC_VPP(0,0,sock);
  162. break;
  163. case 50: /* Vcc 5V */
  164. switch(state->Vpp) {
  165. case 0:
  166. pwr |= SET_VCC_VPP(2,0,sock);
  167. break;
  168. case 50:
  169. pwr |= SET_VCC_VPP(2,1,sock);
  170. break;
  171. case 12:
  172. pwr |= SET_VCC_VPP(2,2,sock);
  173. break;
  174. case 33:
  175. default:
  176. pwr |= SET_VCC_VPP(0,0,sock);
  177. printk("%s: bad Vcc/Vpp (%d:%d)\n",
  178. __FUNCTION__,
  179. state->Vcc,
  180. state->Vpp);
  181. break;
  182. }
  183. break;
  184. case 33: /* Vcc 3.3V */
  185. switch(state->Vpp) {
  186. case 0:
  187. pwr |= SET_VCC_VPP(1,0,sock);
  188. break;
  189. case 12:
  190. pwr |= SET_VCC_VPP(1,2,sock);
  191. break;
  192. case 33:
  193. pwr |= SET_VCC_VPP(1,1,sock);
  194. break;
  195. case 50:
  196. default:
  197. pwr |= SET_VCC_VPP(0,0,sock);
  198. printk("%s: bad Vcc/Vpp (%d:%d)\n",
  199. __FUNCTION__,
  200. state->Vcc,
  201. state->Vpp);
  202. break;
  203. }
  204. break;
  205. default: /* what's this ? */
  206. pwr |= SET_VCC_VPP(0,0,sock);
  207. printk(KERN_ERR "%s: bad Vcc %d\n",
  208. __FUNCTION__, state->Vcc);
  209. break;
  210. }
  211. bcsr->pcmcia = pwr;
  212. au_sync_delay(300);
  213. if (sock == 0) {
  214. if (!(state->flags & SS_RESET)) {
  215. pwr |= BCSR_PCMCIA_PC0DRVEN;
  216. bcsr->pcmcia = pwr;
  217. au_sync_delay(300);
  218. pwr |= BCSR_PCMCIA_PC0RST;
  219. bcsr->pcmcia = pwr;
  220. au_sync_delay(100);
  221. }
  222. else {
  223. pwr &= ~(BCSR_PCMCIA_PC0RST | BCSR_PCMCIA_PC0DRVEN);
  224. bcsr->pcmcia = pwr;
  225. au_sync_delay(100);
  226. }
  227. }
  228. else {
  229. if (!(state->flags & SS_RESET)) {
  230. pwr |= BCSR_PCMCIA_PC1DRVEN;
  231. bcsr->pcmcia = pwr;
  232. au_sync_delay(300);
  233. pwr |= BCSR_PCMCIA_PC1RST;
  234. bcsr->pcmcia = pwr;
  235. au_sync_delay(100);
  236. }
  237. else {
  238. pwr &= ~(BCSR_PCMCIA_PC1RST | BCSR_PCMCIA_PC1DRVEN);
  239. bcsr->pcmcia = pwr;
  240. au_sync_delay(100);
  241. }
  242. }
  243. return 0;
  244. }
  245. /*
  246. * Enable card status IRQs on (re-)initialisation. This can
  247. * be called at initialisation, power management event, or
  248. * pcmcia event.
  249. */
  250. void db1x00_socket_init(struct au1000_pcmcia_socket *skt)
  251. {
  252. /* nothing to do for now */
  253. }
  254. /*
  255. * Disable card status IRQs and PCMCIA bus on suspend.
  256. */
  257. void db1x00_socket_suspend(struct au1000_pcmcia_socket *skt)
  258. {
  259. /* nothing to do for now */
  260. }
  261. struct pcmcia_low_level db1x00_pcmcia_ops = {
  262. .owner = THIS_MODULE,
  263. .hw_init = db1x00_pcmcia_hw_init,
  264. .hw_shutdown = db1x00_pcmcia_shutdown,
  265. .socket_state = db1x00_pcmcia_socket_state,
  266. .configure_socket = db1x00_pcmcia_configure_socket,
  267. .socket_init = db1x00_socket_init,
  268. .socket_suspend = db1x00_socket_suspend
  269. };
  270. int au1x_board_init(struct device *dev)
  271. {
  272. int ret = -ENODEV;
  273. bcsr->pcmcia = 0; /* turn off power, if it's not already off */
  274. au_sync_delay(2);
  275. ret = au1x00_pcmcia_socket_probe(dev, &db1x00_pcmcia_ops, 0, 2);
  276. return ret;
  277. }