1 // SPDX-License-Identifier: GPL-2.0 2 /***************************************************************************/ 3 4 /* 5 * m528x.c -- platform support for ColdFire 528x based boards 6 * 7 * Sub-architcture dependent initialization code for the Freescale 8 * 5280, 5281 and 5282 CPUs. 9 * 10 * Copyright (C) 1999-2003, Greg Ungerer (gerg@snapgear.com) 11 * Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com) 12 */ 13 14 /***************************************************************************/ 15 16 #include <linux/clkdev.h> 17 #include <linux/kernel.h> 18 #include <linux/param.h> 19 #include <linux/init.h> 20 #include <linux/platform_device.h> 21 #include <linux/io.h> 22 #include <asm/machdep.h> 23 #include <asm/coldfire.h> 24 #include <asm/mcfsim.h> 25 #include <asm/mcfuart.h> 26 #include <asm/mcfclk.h> 27 28 /***************************************************************************/ 29 30 DEFINE_CLK(pll, "pll.0", MCF_CLK); 31 DEFINE_CLK(sys, "sys.0", MCF_BUSCLK); 32 33 static struct clk_lookup m528x_clk_lookup[] = { 34 CLKDEV_INIT(NULL, "pll.0", &clk_pll), 35 CLKDEV_INIT(NULL, "sys.0", &clk_sys), 36 CLKDEV_INIT("mcfpit.0", NULL, &clk_pll), 37 CLKDEV_INIT("mcfpit.1", NULL, &clk_pll), 38 CLKDEV_INIT("mcfpit.2", NULL, &clk_pll), 39 CLKDEV_INIT("mcfpit.3", NULL, &clk_pll), 40 CLKDEV_INIT("mcfuart.0", NULL, &clk_sys), 41 CLKDEV_INIT("mcfuart.1", NULL, &clk_sys), 42 CLKDEV_INIT("mcfuart.2", NULL, &clk_sys), 43 CLKDEV_INIT("mcfqspi.0", NULL, &clk_sys), 44 CLKDEV_INIT("fec.0", NULL, &clk_sys), 45 CLKDEV_INIT("imx1-i2c.0", NULL, &clk_sys), 46 }; 47 48 /***************************************************************************/ 49 50 static void __init m528x_qspi_init(void) 51 { 52 #if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) 53 /* setup Port QS for QSPI with gpio CS control */ 54 __raw_writeb(0x07, MCFGPIO_PQSPAR); 55 #endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */ 56 } 57 58 /***************************************************************************/ 59 60 static void __init m528x_i2c_init(void) 61 { 62 #if IS_ENABLED(CONFIG_I2C_IMX) 63 u16 paspar; 64 65 /* setup Port AS Pin Assignment Register for I2C */ 66 /* set PASPA0 to SCL and PASPA1 to SDA */ 67 paspar = readw(MCFGPIO_PASPAR); 68 paspar |= 0xF; 69 writew(paspar, MCFGPIO_PASPAR); 70 #endif /* IS_ENABLED(CONFIG_I2C_IMX) */ 71 } 72 73 /***************************************************************************/ 74 75 static void __init m528x_uarts_init(void) 76 { 77 u8 port; 78 79 /* make sure PUAPAR is set for UART0 and UART1 */ 80 port = readb(MCFGPIO_PUAPAR); 81 port |= 0x03 | (0x03 << 2); 82 writeb(port, MCFGPIO_PUAPAR); 83 } 84 85 /***************************************************************************/ 86 87 static void __init m528x_fec_init(void) 88 { 89 u16 v16; 90 91 /* Set multi-function pins to ethernet mode for fec0 */ 92 v16 = readw(MCFGPIO_PASPAR); 93 writew(v16 | 0xf00, MCFGPIO_PASPAR); 94 writeb(0xc0, MCFGPIO_PEHLPAR); 95 } 96 97 /***************************************************************************/ 98 99 #ifdef CONFIG_WILDFIRE 100 void wildfire_halt(void) 101 { 102 writeb(0, 0x30000007); 103 writeb(0x2, 0x30000007); 104 } 105 #endif 106 107 #ifdef CONFIG_WILDFIREMOD 108 void wildfiremod_halt(void) 109 { 110 printk(KERN_INFO "WildFireMod hibernating...\n"); 111 112 /* Set portE.5 to Digital IO */ 113 writew(readw(MCFGPIO_PEPAR) & ~(1 << (5 * 2)), MCFGPIO_PEPAR); 114 115 /* Make portE.5 an output */ 116 writeb(readb(MCFGPIO_PDDR_E) | (1 << 5), MCFGPIO_PDDR_E); 117 118 /* Now toggle portE.5 from low to high */ 119 writeb(readb(MCFGPIO_PODR_E) & ~(1 << 5), MCFGPIO_PODR_E); 120 writeb(readb(MCFGPIO_PODR_E) | (1 << 5), MCFGPIO_PODR_E); 121 122 printk(KERN_EMERG "Failed to hibernate. Halting!\n"); 123 } 124 #endif 125 126 void __init config_BSP(char *commandp, int size) 127 { 128 #ifdef CONFIG_WILDFIRE 129 mach_halt = wildfire_halt; 130 #endif 131 #ifdef CONFIG_WILDFIREMOD 132 mach_halt = wildfiremod_halt; 133 #endif 134 mach_sched_init = hw_timer_init; 135 m528x_uarts_init(); 136 m528x_fec_init(); 137 m528x_qspi_init(); 138 m528x_i2c_init(); 139 140 clkdev_add_table(m528x_clk_lookup, ARRAY_SIZE(m528x_clk_lookup)); 141 } 142 143 /***************************************************************************/ 144