gef_sbc310.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * GE SBC310 board support
  4 *
  5 * Author: Martyn Welch <martyn.welch@ge.com>
  6 *
  7 * Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc.
  8 *
  9 * Based on: mpc86xx_hpcn.c (MPC86xx HPCN board specific routines)
 10 * Copyright 2006 Freescale Semiconductor Inc.
 11 *
 12 * NEC fixup adapted from arch/mips/pci/fixup-lm2e.c
 13 */
 14
 15#include <linux/stddef.h>
 16#include <linux/kernel.h>
 17#include <linux/pci.h>
 18#include <linux/kdev_t.h>
 19#include <linux/delay.h>
 20#include <linux/seq_file.h>
 21#include <linux/of.h>
 22#include <linux/of_address.h>
 23
 24#include <asm/time.h>
 25#include <asm/machdep.h>
 26#include <asm/pci-bridge.h>
 27#include <mm/mmu_decl.h>
 28#include <asm/udbg.h>
 29
 30#include <asm/mpic.h>
 31#include <asm/nvram.h>
 32
 33#include <sysdev/fsl_pci.h>
 34#include <sysdev/fsl_soc.h>
 35#include <sysdev/ge/ge_pic.h>
 36
 37#include "mpc86xx.h"
 38
 39#undef DEBUG
 40
 41#ifdef DEBUG
 42#define DBG (fmt...) do { printk(KERN_ERR "SBC310: " fmt); } while (0)
 43#else
 44#define DBG (fmt...) do { } while (0)
 45#endif
 46
 47void __iomem *sbc310_regs;
 48
 49static void __init gef_sbc310_init_irq(void)
 50{
 51	struct device_node *cascade_node = NULL;
 52
 53	mpc86xx_init_irq();
 54
 55	/*
 56	 * There is a simple interrupt handler in the main FPGA, this needs
 57	 * to be cascaded into the MPIC
 58	 */
 59	cascade_node = of_find_compatible_node(NULL, NULL, "gef,fpga-pic");
 60	if (!cascade_node) {
 61		printk(KERN_WARNING "SBC310: No FPGA PIC\n");
 62		return;
 63	}
 64
 65	gef_pic_init(cascade_node);
 66	of_node_put(cascade_node);
 67}
 68
 69static void __init gef_sbc310_setup_arch(void)
 70{
 71	struct device_node *regs;
 72	printk(KERN_INFO "GE Intelligent Platforms SBC310 6U VPX SBC\n");
 73
 74#ifdef CONFIG_SMP
 75	mpc86xx_smp_init();
 76#endif
 77
 78	fsl_pci_assign_primary();
 79
 80	/* Remap basic board registers */
 81	regs = of_find_compatible_node(NULL, NULL, "gef,fpga-regs");
 82	if (regs) {
 83		sbc310_regs = of_iomap(regs, 0);
 84		if (sbc310_regs == NULL)
 85			printk(KERN_WARNING "Unable to map board registers\n");
 86		of_node_put(regs);
 87	}
 88
 89#if defined(CONFIG_MMIO_NVRAM)
 90	mmio_nvram_init();
 91#endif
 92}
 93
 94/* Return the PCB revision */
 95static unsigned int gef_sbc310_get_board_id(void)
 96{
 97	unsigned int reg;
 98
 99	reg = ioread32(sbc310_regs);
100	return reg & 0xff;
101}
102
103/* Return the PCB revision */
104static unsigned int gef_sbc310_get_pcb_rev(void)
105{
106	unsigned int reg;
107
108	reg = ioread32(sbc310_regs);
109	return (reg >> 8) & 0xff;
110}
111
112/* Return the board (software) revision */
113static unsigned int gef_sbc310_get_board_rev(void)
114{
115	unsigned int reg;
116
117	reg = ioread32(sbc310_regs);
118	return (reg >> 16) & 0xff;
119}
120
121/* Return the FPGA revision */
122static unsigned int gef_sbc310_get_fpga_rev(void)
123{
124	unsigned int reg;
125
126	reg = ioread32(sbc310_regs);
127	return (reg >> 24) & 0xf;
128}
129
130static void gef_sbc310_show_cpuinfo(struct seq_file *m)
131{
132	uint svid = mfspr(SPRN_SVR);
133
134	seq_printf(m, "Vendor\t\t: GE Intelligent Platforms\n");
135
136	seq_printf(m, "Board ID\t: 0x%2.2x\n", gef_sbc310_get_board_id());
137	seq_printf(m, "Revision\t: %u%c\n", gef_sbc310_get_pcb_rev(),
138		('A' + gef_sbc310_get_board_rev() - 1));
139	seq_printf(m, "FPGA Revision\t: %u\n", gef_sbc310_get_fpga_rev());
140
141	seq_printf(m, "SVR\t\t: 0x%x\n", svid);
142
143}
144
145static void gef_sbc310_nec_fixup(struct pci_dev *pdev)
146{
147	unsigned int val;
148
149	/* Do not do the fixup on other platforms! */
150	if (!machine_is(gef_sbc310))
151		return;
152
153	printk(KERN_INFO "Running NEC uPD720101 Fixup\n");
154
155	/* Ensure only ports 1 & 2 are enabled */
156	pci_read_config_dword(pdev, 0xe0, &val);
157	pci_write_config_dword(pdev, 0xe0, (val & ~7) | 0x2);
158
159	/* System clock is 48-MHz Oscillator and EHCI Enabled. */
160	pci_write_config_dword(pdev, 0xe4, 1 << 5);
161}
162DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
163	gef_sbc310_nec_fixup);
164
165machine_arch_initcall(gef_sbc310, mpc86xx_common_publish_devices);
166
167define_machine(gef_sbc310) {
168	.name			= "GE SBC310",
169	.compatible		= "gef,sbc310",
170	.setup_arch		= gef_sbc310_setup_arch,
171	.init_IRQ		= gef_sbc310_init_irq,
172	.show_cpuinfo		= gef_sbc310_show_cpuinfo,
173	.get_irq		= mpic_get_irq,
174	.time_init		= mpc86xx_time_init,
175	.progress		= udbg_progress,
176#ifdef CONFIG_PCI
177	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
178#endif
179};