board_setup.c 5.2 KB

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  1. /*
  2. *
  3. * BRIEF MODULE DESCRIPTION
  4. * Alchemy Pb1200/Db1200 board setup.
  5. *
  6. * This program is free software; you can redistribute it and/or modify it
  7. * under the terms of the GNU General Public License as published by the
  8. * Free Software Foundation; either version 2 of the License, or (at your
  9. * option) any later version.
  10. *
  11. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  12. * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  13. * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
  14. * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  15. * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  16. * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  17. * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  18. * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  19. * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  20. * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  21. *
  22. * You should have received a copy of the GNU General Public License along
  23. * with this program; if not, write to the Free Software Foundation, Inc.,
  24. * 675 Mass Ave, Cambridge, MA 02139, USA.
  25. */
  26. #include <linux/init.h>
  27. #include <linux/interrupt.h>
  28. #include <linux/sched.h>
  29. #include <asm/mach-au1x00/au1000.h>
  30. #include <asm/mach-db1x00/bcsr.h>
  31. #ifdef CONFIG_MIPS_PB1200
  32. #include <asm/mach-pb1x00/pb1200.h>
  33. #endif
  34. #ifdef CONFIG_MIPS_DB1200
  35. #include <asm/mach-db1x00/db1200.h>
  36. #define PB1200_INT_BEGIN DB1200_INT_BEGIN
  37. #define PB1200_INT_END DB1200_INT_END
  38. #endif
  39. #include <prom.h>
  40. const char *get_system_type(void)
  41. {
  42. return "Alchemy Pb1200";
  43. }
  44. void board_reset(void)
  45. {
  46. bcsr_write(BCSR_RESETS, 0);
  47. bcsr_write(BCSR_SYSTEM, 0);
  48. }
  49. void __init board_setup(void)
  50. {
  51. char *argptr;
  52. printk(KERN_INFO "AMD Alchemy Pb1200 Board\n");
  53. bcsr_init(PB1200_BCSR_PHYS_ADDR,
  54. PB1200_BCSR_PHYS_ADDR + PB1200_BCSR_HEXLED_OFS);
  55. argptr = prom_getcmdline();
  56. #ifdef CONFIG_SERIAL_8250_CONSOLE
  57. argptr = strstr(argptr, "console=");
  58. if (argptr == NULL) {
  59. argptr = prom_getcmdline();
  60. strcat(argptr, " console=ttyS0,115200");
  61. }
  62. #endif
  63. #ifdef CONFIG_FB_AU1200
  64. strcat(argptr, " video=au1200fb:panel:bs");
  65. #endif
  66. #if 0
  67. {
  68. u32 pin_func;
  69. /*
  70. * Enable PSC1 SYNC for AC97. Normaly done in audio driver,
  71. * but it is board specific code, so put it here.
  72. */
  73. pin_func = au_readl(SYS_PINFUNC);
  74. au_sync();
  75. pin_func |= SYS_PF_MUST_BE_SET | SYS_PF_PSC1_S1;
  76. au_writel(pin_func, SYS_PINFUNC);
  77. au_writel(0, (u32)bcsr | 0x10); /* turn off PCMCIA power */
  78. au_sync();
  79. }
  80. #endif
  81. #if defined(CONFIG_I2C_AU1550)
  82. {
  83. u32 freq0, clksrc;
  84. u32 pin_func;
  85. /* Select SMBus in CPLD */
  86. bcsr_mod(BCSR_RESETS, BCSR_RESETS_PSC0MUX, 0);
  87. pin_func = au_readl(SYS_PINFUNC);
  88. au_sync();
  89. pin_func &= ~(SYS_PINFUNC_P0A | SYS_PINFUNC_P0B);
  90. /* Set GPIOs correctly */
  91. pin_func |= 2 << 17;
  92. au_writel(pin_func, SYS_PINFUNC);
  93. au_sync();
  94. /* The I2C driver depends on 50 MHz clock */
  95. freq0 = au_readl(SYS_FREQCTRL0);
  96. au_sync();
  97. freq0 &= ~(SYS_FC_FRDIV1_MASK | SYS_FC_FS1 | SYS_FC_FE1);
  98. freq0 |= 3 << SYS_FC_FRDIV1_BIT;
  99. /* 396 MHz / (3 + 1) * 2 == 49.5 MHz */
  100. au_writel(freq0, SYS_FREQCTRL0);
  101. au_sync();
  102. freq0 |= SYS_FC_FE1;
  103. au_writel(freq0, SYS_FREQCTRL0);
  104. au_sync();
  105. clksrc = au_readl(SYS_CLKSRC);
  106. au_sync();
  107. clksrc &= ~(SYS_CS_CE0 | SYS_CS_DE0 | SYS_CS_ME0_MASK);
  108. /* Bit 22 is EXTCLK0 for PSC0 */
  109. clksrc |= SYS_CS_MUX_FQ1 << SYS_CS_ME0_BIT;
  110. au_writel(clksrc, SYS_CLKSRC);
  111. au_sync();
  112. }
  113. #endif
  114. /*
  115. * The Pb1200 development board uses external MUX for PSC0 to
  116. * support SMB/SPI. bcsr_resets bit 12: 0=SMB 1=SPI
  117. */
  118. #ifdef CONFIG_I2C_AU1550
  119. bcsr_mod(BCSR_RESETS, BCSR_RESETS_PSC0MUX, 0);
  120. #endif
  121. au_sync();
  122. }
  123. static int __init pb1200_init_irq(void)
  124. {
  125. /* We have a problem with CPLD rev 3. */
  126. if (BCSR_WHOAMI_CPLD(bcsr_read(BCSR_WHOAMI)) <= 3) {
  127. printk(KERN_ERR "WARNING!!!\n");
  128. printk(KERN_ERR "WARNING!!!\n");
  129. printk(KERN_ERR "WARNING!!!\n");
  130. printk(KERN_ERR "WARNING!!!\n");
  131. printk(KERN_ERR "WARNING!!!\n");
  132. printk(KERN_ERR "WARNING!!!\n");
  133. printk(KERN_ERR "Pb1200 must be at CPLD rev 4. Please have Pb1200\n");
  134. printk(KERN_ERR "updated to latest revision. This software will\n");
  135. printk(KERN_ERR "not work on anything less than CPLD rev 4.\n");
  136. printk(KERN_ERR "WARNING!!!\n");
  137. printk(KERN_ERR "WARNING!!!\n");
  138. printk(KERN_ERR "WARNING!!!\n");
  139. printk(KERN_ERR "WARNING!!!\n");
  140. printk(KERN_ERR "WARNING!!!\n");
  141. printk(KERN_ERR "WARNING!!!\n");
  142. panic("Game over. Your score is 0.");
  143. }
  144. set_irq_type(AU1200_GPIO7_INT, IRQF_TRIGGER_LOW);
  145. bcsr_init_irq(PB1200_INT_BEGIN, PB1200_INT_END, AU1200_GPIO7_INT);
  146. return 0;
  147. }
  148. arch_initcall(pb1200_init_irq);
  149. int board_au1200fb_panel(void)
  150. {
  151. return (bcsr_read(BCSR_SWITCHES) >> 8) & 0x0f;
  152. }
  153. int board_au1200fb_panel_init(void)
  154. {
  155. /* Apply power */
  156. bcsr_mod(BCSR_BOARD, 0, BCSR_BOARD_LCDVEE | BCSR_BOARD_LCDVDD |
  157. BCSR_BOARD_LCDBL);
  158. /* printk(KERN_DEBUG "board_au1200fb_panel_init()\n"); */
  159. return 0;
  160. }
  161. int board_au1200fb_panel_shutdown(void)
  162. {
  163. /* Remove power */
  164. bcsr_mod(BCSR_BOARD, BCSR_BOARD_LCDVEE | BCSR_BOARD_LCDVDD |
  165. BCSR_BOARD_LCDBL, 0);
  166. /* printk(KERN_DEBUG "board_au1200fb_panel_shutdown()\n"); */
  167. return 0;
  168. }