1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright 2010-2011, 2013 Freescale Semiconductor, Inc. 4 * 5 * Author: Roy Zang <tie-fei.zang@freescale.com> 6 * 7 * Description: 8 * P1023 RDB Board Setup 9 */ 10 11 #include <linux/kernel.h> 12 #include <linux/init.h> 13 #include <linux/errno.h> 14 #include <linux/pci.h> 15 #include <linux/delay.h> 16 #include <linux/module.h> 17 #include <linux/fsl_devices.h> 18 #include <linux/of_address.h> 19 #include <linux/of_platform.h> 20 #include <linux/of_device.h> 21 22 #include <asm/time.h> 23 #include <asm/machdep.h> 24 #include <asm/pci-bridge.h> 25 #include <mm/mmu_decl.h> 26 #include <asm/udbg.h> 27 #include <asm/mpic.h> 28 #include "smp.h" 29 30 #include <sysdev/fsl_soc.h> 31 #include <sysdev/fsl_pci.h> 32 33 #include "mpc85xx.h" 34 35 /* ************************************************************************ 36 * 37 * Setup the architecture 38 * 39 */ 40 static void __init mpc85xx_rdb_setup_arch(void) 41 { 42 struct device_node *np; 43 44 if (ppc_md.progress) 45 ppc_md.progress("p1023_rdb_setup_arch()", 0); 46 47 /* Map BCSR area */ 48 np = of_find_node_by_name(NULL, "bcsr"); 49 if (np != NULL) { 50 static u8 __iomem *bcsr_regs; 51 52 bcsr_regs = of_iomap(np, 0); 53 of_node_put(np); 54 55 if (!bcsr_regs) { 56 printk(KERN_ERR 57 "BCSR: Failed to map bcsr register space\n"); 58 return; 59 } else { 60 #define BCSR15_I2C_BUS0_SEG_CLR 0x07 61 #define BCSR15_I2C_BUS0_SEG2 0x02 62 /* 63 * Note: Accessing exclusively i2c devices. 64 * 65 * The i2c controller selects initially ID EEPROM in the u-boot; 66 * but if menu configuration selects RTC support in the kernel, 67 * the i2c controller switches to select RTC chip in the kernel. 68 */ 69 #ifdef CONFIG_RTC_CLASS 70 /* Enable RTC chip on the segment #2 of i2c */ 71 clrbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG_CLR); 72 setbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG2); 73 #endif 74 75 iounmap(bcsr_regs); 76 } 77 } 78 79 mpc85xx_smp_init(); 80 81 fsl_pci_assign_primary(); 82 } 83 84 machine_arch_initcall(p1023_rdb, mpc85xx_common_publish_devices); 85 86 static void __init mpc85xx_rdb_pic_init(void) 87 { 88 struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN | 89 MPIC_SINGLE_DEST_CPU, 90 0, 256, " OpenPIC "); 91 92 BUG_ON(mpic == NULL); 93 94 mpic_init(mpic); 95 } 96 97 static int __init p1023_rdb_probe(void) 98 { 99 return of_machine_is_compatible("fsl,P1023RDB"); 100 101 } 102 103 define_machine(p1023_rdb) { 104 .name = "P1023 RDB", 105 .probe = p1023_rdb_probe, 106 .setup_arch = mpc85xx_rdb_setup_arch, 107 .init_IRQ = mpc85xx_rdb_pic_init, 108 .get_irq = mpic_get_irq, 109 .calibrate_decr = generic_calibrate_decr, 110 .progress = udbg_progress, 111 #ifdef CONFIG_PCI 112 .pcibios_fixup_bus = fsl_pcibios_fixup_bus, 113 .pcibios_fixup_phb = fsl_pcibios_fixup_phb, 114 #endif 115 }; 116