pci.c 4.8 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2006-2009 Freescale Semiconductor, Inc.
  4. */
  5. #include <init.h>
  6. #include <asm/mmu.h>
  7. #include <asm/io.h>
  8. #include <common.h>
  9. #include <mpc83xx.h>
  10. #include <pci.h>
  11. #include <i2c.h>
  12. #include <asm/fsl_i2c.h>
  13. static struct pci_region pci1_regions[] = {
  14. {
  15. bus_start: CONFIG_SYS_PCI1_MEM_BASE,
  16. phys_start: CONFIG_SYS_PCI1_MEM_PHYS,
  17. size: CONFIG_SYS_PCI1_MEM_SIZE,
  18. flags: PCI_REGION_MEM | PCI_REGION_PREFETCH
  19. },
  20. {
  21. bus_start: CONFIG_SYS_PCI1_IO_BASE,
  22. phys_start: CONFIG_SYS_PCI1_IO_PHYS,
  23. size: CONFIG_SYS_PCI1_IO_SIZE,
  24. flags: PCI_REGION_IO
  25. },
  26. {
  27. bus_start: CONFIG_SYS_PCI1_MMIO_BASE,
  28. phys_start: CONFIG_SYS_PCI1_MMIO_PHYS,
  29. size: CONFIG_SYS_PCI1_MMIO_SIZE,
  30. flags: PCI_REGION_MEM
  31. },
  32. };
  33. #ifdef CONFIG_MPC83XX_PCI2
  34. static struct pci_region pci2_regions[] = {
  35. {
  36. bus_start: CONFIG_SYS_PCI2_MEM_BASE,
  37. phys_start: CONFIG_SYS_PCI2_MEM_PHYS,
  38. size: CONFIG_SYS_PCI2_MEM_SIZE,
  39. flags: PCI_REGION_MEM | PCI_REGION_PREFETCH
  40. },
  41. {
  42. bus_start: CONFIG_SYS_PCI2_IO_BASE,
  43. phys_start: CONFIG_SYS_PCI2_IO_PHYS,
  44. size: CONFIG_SYS_PCI2_IO_SIZE,
  45. flags: PCI_REGION_IO
  46. },
  47. {
  48. bus_start: CONFIG_SYS_PCI2_MMIO_BASE,
  49. phys_start: CONFIG_SYS_PCI2_MMIO_PHYS,
  50. size: CONFIG_SYS_PCI2_MMIO_SIZE,
  51. flags: PCI_REGION_MEM
  52. },
  53. };
  54. #endif
  55. #ifndef CONFIG_PCISLAVE
  56. void pib_init(void)
  57. {
  58. u8 val8, orig_i2c_bus;
  59. /*
  60. * Assign PIB PMC slot to desired PCI bus
  61. */
  62. /* Switch temporarily to I2C bus #2 */
  63. orig_i2c_bus = i2c_get_bus_num();
  64. i2c_set_bus_num(1);
  65. val8 = 0;
  66. i2c_write(0x23, 0x6, 1, &val8, 1);
  67. i2c_write(0x23, 0x7, 1, &val8, 1);
  68. val8 = 0xff;
  69. i2c_write(0x23, 0x2, 1, &val8, 1);
  70. i2c_write(0x23, 0x3, 1, &val8, 1);
  71. val8 = 0;
  72. i2c_write(0x26, 0x6, 1, &val8, 1);
  73. val8 = 0x34;
  74. i2c_write(0x26, 0x7, 1, &val8, 1);
  75. #if defined(CONFIG_PCI_64BIT)
  76. val8 = 0xf4; /* PMC2:PCI1/64-bit */
  77. #elif defined(CONFIG_PCI_ALL_PCI1)
  78. val8 = 0xf3; /* PMC1:PCI1 PMC2:PCI1 PMC3:PCI1 */
  79. #elif defined(CONFIG_PCI_ONE_PCI1)
  80. val8 = 0xf9; /* PMC1:PCI1 PMC2:PCI2 PMC3:PCI2 */
  81. #else
  82. val8 = 0xf5; /* PMC1:PCI1 PMC2:PCI1 PMC3:PCI2 */
  83. #endif
  84. i2c_write(0x26, 0x2, 1, &val8, 1);
  85. val8 = 0xff;
  86. i2c_write(0x26, 0x3, 1, &val8, 1);
  87. val8 = 0;
  88. i2c_write(0x27, 0x6, 1, &val8, 1);
  89. i2c_write(0x27, 0x7, 1, &val8, 1);
  90. val8 = 0xff;
  91. i2c_write(0x27, 0x2, 1, &val8, 1);
  92. val8 = 0xef;
  93. i2c_write(0x27, 0x3, 1, &val8, 1);
  94. asm("eieio");
  95. #if defined(CONFIG_PCI_64BIT)
  96. printf("PCI1: 64-bit on PMC2\n");
  97. #elif defined(CONFIG_PCI_ALL_PCI1)
  98. printf("PCI1: 32-bit on PMC1, PMC2, PMC3\n");
  99. #elif defined(CONFIG_PCI_ONE_PCI1)
  100. printf("PCI1: 32-bit on PMC1\n");
  101. printf("PCI2: 32-bit on PMC2, PMC3\n");
  102. #else
  103. printf("PCI1: 32-bit on PMC1, PMC2\n");
  104. printf("PCI2: 32-bit on PMC3\n");
  105. #endif
  106. /* Reset to original I2C bus */
  107. i2c_set_bus_num(orig_i2c_bus);
  108. }
  109. void pci_init_board(void)
  110. {
  111. volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
  112. volatile clk83xx_t *clk = (volatile clk83xx_t *)&immr->clk;
  113. volatile law83xx_t *pci_law = immr->sysconf.pcilaw;
  114. #ifndef CONFIG_MPC83XX_PCI2
  115. struct pci_region *reg[] = { pci1_regions };
  116. #else
  117. struct pci_region *reg[] = { pci1_regions, pci2_regions };
  118. #endif
  119. /* initialize the PCA9555PW IO expander on the PIB board */
  120. pib_init();
  121. /* Enable all 8 PCI_CLK_OUTPUTS */
  122. clk->occr = 0xff000000;
  123. udelay(2000);
  124. /* Configure PCI Local Access Windows */
  125. pci_law[0].bar = CONFIG_SYS_PCI1_MEM_PHYS & LAWBAR_BAR;
  126. pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_1G;
  127. pci_law[1].bar = CONFIG_SYS_PCI1_IO_PHYS & LAWBAR_BAR;
  128. pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_4M;
  129. udelay(2000);
  130. #ifndef CONFIG_MPC83XX_PCI2
  131. mpc83xx_pci_init(1, reg);
  132. #else
  133. mpc83xx_pci_init(2, reg);
  134. #endif
  135. }
  136. #else
  137. void pci_init_board(void)
  138. {
  139. volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
  140. volatile law83xx_t *pci_law = immr->sysconf.pcilaw;
  141. volatile pcictrl83xx_t *pci_ctrl = &immr->pci_ctrl[0];
  142. struct pci_region *reg[] = { pci1_regions };
  143. /* Configure PCI Local Access Windows */
  144. pci_law[0].bar = CONFIG_SYS_PCI1_MEM_PHYS & LAWBAR_BAR;
  145. pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_1G;
  146. pci_law[1].bar = CONFIG_SYS_PCI1_IO_PHYS & LAWBAR_BAR;
  147. pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_4M;
  148. mpc83xx_pci_init(1, reg);
  149. /* Configure PCI Inbound Translation Windows (3 1MB windows) */
  150. pci_ctrl->pitar0 = 0x0;
  151. pci_ctrl->pibar0 = 0x0;
  152. pci_ctrl->piwar0 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP |
  153. PIWAR_WTT_SNOOP | PIWAR_IWS_1M;
  154. pci_ctrl->pitar1 = 0x0;
  155. pci_ctrl->pibar1 = 0x0;
  156. pci_ctrl->piebar1 = 0x0;
  157. pci_ctrl->piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP |
  158. PIWAR_WTT_SNOOP | PIWAR_IWS_1M;
  159. pci_ctrl->pitar2 = 0x0;
  160. pci_ctrl->pibar2 = 0x0;
  161. pci_ctrl->piebar2 = 0x0;
  162. pci_ctrl->piwar2 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP |
  163. PIWAR_WTT_SNOOP | PIWAR_IWS_1M;
  164. /* Unlock the configuration bit */
  165. mpc83xx_pcislave_unlock(0);
  166. printf("PCI: Agent mode enabled\n");
  167. }
  168. #endif /* CONFIG_PCISLAVE */