m528x.c 3.8 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /***************************************************************************/
  3. /*
  4. * m528x.c -- platform support for ColdFire 528x based boards
  5. *
  6. * Sub-architcture dependent initialization code for the Freescale
  7. * 5280, 5281 and 5282 CPUs.
  8. *
  9. * Copyright (C) 1999-2003, Greg Ungerer ([email protected])
  10. * Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com)
  11. */
  12. /***************************************************************************/
  13. #include <linux/clkdev.h>
  14. #include <linux/kernel.h>
  15. #include <linux/param.h>
  16. #include <linux/init.h>
  17. #include <linux/platform_device.h>
  18. #include <linux/io.h>
  19. #include <asm/machdep.h>
  20. #include <asm/coldfire.h>
  21. #include <asm/mcfsim.h>
  22. #include <asm/mcfuart.h>
  23. #include <asm/mcfclk.h>
  24. /***************************************************************************/
  25. DEFINE_CLK(pll, "pll.0", MCF_CLK);
  26. DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
  27. static struct clk_lookup m528x_clk_lookup[] = {
  28. CLKDEV_INIT(NULL, "pll.0", &clk_pll),
  29. CLKDEV_INIT(NULL, "sys.0", &clk_sys),
  30. CLKDEV_INIT("mcfpit.0", NULL, &clk_pll),
  31. CLKDEV_INIT("mcfpit.1", NULL, &clk_pll),
  32. CLKDEV_INIT("mcfpit.2", NULL, &clk_pll),
  33. CLKDEV_INIT("mcfpit.3", NULL, &clk_pll),
  34. CLKDEV_INIT("mcfuart.0", NULL, &clk_sys),
  35. CLKDEV_INIT("mcfuart.1", NULL, &clk_sys),
  36. CLKDEV_INIT("mcfuart.2", NULL, &clk_sys),
  37. CLKDEV_INIT("mcfqspi.0", NULL, &clk_sys),
  38. CLKDEV_INIT("fec.0", NULL, &clk_sys),
  39. CLKDEV_INIT("imx1-i2c.0", NULL, &clk_sys),
  40. };
  41. /***************************************************************************/
  42. static void __init m528x_qspi_init(void)
  43. {
  44. #if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
  45. /* setup Port QS for QSPI with gpio CS control */
  46. __raw_writeb(0x07, MCFGPIO_PQSPAR);
  47. #endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
  48. }
  49. /***************************************************************************/
  50. static void __init m528x_i2c_init(void)
  51. {
  52. #if IS_ENABLED(CONFIG_I2C_IMX)
  53. u16 paspar;
  54. /* setup Port AS Pin Assignment Register for I2C */
  55. /* set PASPA0 to SCL and PASPA1 to SDA */
  56. paspar = readw(MCFGPIO_PASPAR);
  57. paspar |= 0xF;
  58. writew(paspar, MCFGPIO_PASPAR);
  59. #endif /* IS_ENABLED(CONFIG_I2C_IMX) */
  60. }
  61. /***************************************************************************/
  62. static void __init m528x_uarts_init(void)
  63. {
  64. u8 port;
  65. /* make sure PUAPAR is set for UART0 and UART1 */
  66. port = readb(MCFGPIO_PUAPAR);
  67. port |= 0x03 | (0x03 << 2);
  68. writeb(port, MCFGPIO_PUAPAR);
  69. }
  70. /***************************************************************************/
  71. static void __init m528x_fec_init(void)
  72. {
  73. u16 v16;
  74. /* Set multi-function pins to ethernet mode for fec0 */
  75. v16 = readw(MCFGPIO_PASPAR);
  76. writew(v16 | 0xf00, MCFGPIO_PASPAR);
  77. writeb(0xc0, MCFGPIO_PEHLPAR);
  78. }
  79. /***************************************************************************/
  80. #ifdef CONFIG_WILDFIRE
  81. void wildfire_halt(void)
  82. {
  83. writeb(0, 0x30000007);
  84. writeb(0x2, 0x30000007);
  85. }
  86. #endif
  87. #ifdef CONFIG_WILDFIREMOD
  88. void wildfiremod_halt(void)
  89. {
  90. printk(KERN_INFO "WildFireMod hibernating...\n");
  91. /* Set portE.5 to Digital IO */
  92. writew(readw(MCFGPIO_PEPAR) & ~(1 << (5 * 2)), MCFGPIO_PEPAR);
  93. /* Make portE.5 an output */
  94. writeb(readb(MCFGPIO_PDDR_E) | (1 << 5), MCFGPIO_PDDR_E);
  95. /* Now toggle portE.5 from low to high */
  96. writeb(readb(MCFGPIO_PODR_E) & ~(1 << 5), MCFGPIO_PODR_E);
  97. writeb(readb(MCFGPIO_PODR_E) | (1 << 5), MCFGPIO_PODR_E);
  98. printk(KERN_EMERG "Failed to hibernate. Halting!\n");
  99. }
  100. #endif
  101. void __init config_BSP(char *commandp, int size)
  102. {
  103. #ifdef CONFIG_WILDFIRE
  104. mach_halt = wildfire_halt;
  105. #endif
  106. #ifdef CONFIG_WILDFIREMOD
  107. mach_halt = wildfiremod_halt;
  108. #endif
  109. mach_sched_init = hw_timer_init;
  110. m528x_uarts_init();
  111. m528x_fec_init();
  112. m528x_qspi_init();
  113. m528x_i2c_init();
  114. clkdev_add_table(m528x_clk_lookup, ARRAY_SIZE(m528x_clk_lookup));
  115. }
  116. /***************************************************************************/