diff options
Diffstat (limited to 'arch/powerpc/platforms/83xx/misc.c')
| -rw-r--r-- | arch/powerpc/platforms/83xx/misc.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/83xx/misc.c b/arch/powerpc/platforms/83xx/misc.c new file mode 100644 index 000000000..2b6589fe8 --- /dev/null +++ b/arch/powerpc/platforms/83xx/misc.c @@ -0,0 +1,169 @@ +/* + * misc setup functions for MPC83xx + * + * Maintainer: Kumar Gala <galak@kernel.crashing.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/stddef.h> +#include <linux/kernel.h> +#include <linux/of_platform.h> +#include <linux/pci.h> + +#include <asm/debug.h> +#include <asm/io.h> +#include <asm/hw_irq.h> +#include <asm/ipic.h> +#include <soc/fsl/qe/qe_ic.h> +#include <sysdev/fsl_soc.h> +#include <sysdev/fsl_pci.h> + +#include "mpc83xx.h" + +static __be32 __iomem *restart_reg_base; + +static int __init mpc83xx_restart_init(void) +{ + /* map reset restart_reg_baseister space */ + restart_reg_base = ioremap(get_immrbase() + 0x900, 0xff); + + return 0; +} + +arch_initcall(mpc83xx_restart_init); + +void __noreturn mpc83xx_restart(char *cmd) +{ +#define RST_OFFSET 0x00000900 +#define RST_PROT_REG 0x00000018 +#define RST_CTRL_REG 0x0000001c + + local_irq_disable(); + + if (restart_reg_base) { + /* enable software reset "RSTE" */ + out_be32(restart_reg_base + (RST_PROT_REG >> 2), 0x52535445); + + /* set software hard reset */ + out_be32(restart_reg_base + (RST_CTRL_REG >> 2), 0x2); + } else { + printk (KERN_EMERG "Error: Restart registers not mapped, spinning!\n"); + } + + for (;;) ; +} + +long __init mpc83xx_time_init(void) +{ +#define SPCR_OFFSET 0x00000110 +#define SPCR_TBEN 0x00400000 + __be32 __iomem *spcr = ioremap(get_immrbase() + SPCR_OFFSET, 4); + __be32 tmp; + + tmp = in_be32(spcr); + out_be32(spcr, tmp | SPCR_TBEN); + + iounmap(spcr); + + return 0; +} + +void __init mpc83xx_ipic_init_IRQ(void) +{ + struct device_node *np; + + /* looking for fsl,pq2pro-pic which is asl compatible with fsl,ipic */ + np = of_find_compatible_node(NULL, NULL, "fsl,ipic"); + if (!np) + np = of_find_node_by_type(NULL, "ipic"); + if (!np) + return; + + ipic_init(np, 0); + + of_node_put(np); + + /* Initialize the default interrupt mapping priorities, + * in case the boot rom changed something on us. + */ + ipic_set_default_priority(); +} + +#ifdef CONFIG_QUICC_ENGINE +void __init mpc83xx_qe_init_IRQ(void) +{ + struct device_node *np; + + np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic"); + if (!np) { + np = of_find_node_by_type(NULL, "qeic"); + if (!np) + return; + } + qe_ic_init(np, 0, qe_ic_cascade_low_ipic, qe_ic_cascade_high_ipic); + of_node_put(np); +} + +void __init mpc83xx_ipic_and_qe_init_IRQ(void) +{ + mpc83xx_ipic_init_IRQ(); + mpc83xx_qe_init_IRQ(); +} +#endif /* CONFIG_QUICC_ENGINE */ + +static const struct of_device_id of_bus_ids[] __initconst = { + { .type = "soc", }, + { .compatible = "soc", }, + { .compatible = "simple-bus" }, + { .compatible = "gianfar" }, + { .compatible = "gpio-leds", }, + { .type = "qe", }, + { .compatible = "fsl,qe", }, + {}, +}; + +int __init mpc83xx_declare_of_platform_devices(void) +{ + of_platform_bus_probe(NULL, of_bus_ids, NULL); + return 0; +} + +#ifdef CONFIG_PCI +void __init mpc83xx_setup_pci(void) +{ + struct device_node *np; + + for_each_compatible_node(np, "pci", "fsl,mpc8349-pci") + mpc83xx_add_bridge(np); + for_each_compatible_node(np, "pci", "fsl,mpc8314-pcie") + mpc83xx_add_bridge(np); +} +#endif + +void __init mpc83xx_setup_arch(void) +{ + if (ppc_md.progress) + ppc_md.progress("mpc83xx_setup_arch()", 0); + + mpc83xx_setup_pci(); +} + +int machine_check_83xx(struct pt_regs *regs) +{ + u32 mask = 1 << (31 - IPIC_MCP_WDT); + + if (!(regs->msr & SRR1_MCE_MCP) || !(ipic_get_mcp_status() & mask)) + return machine_check_generic(regs); + ipic_clear_mcp_status(mask); + + if (debugger_fault_handler(regs)) + return 1; + + die("Watchdog NMI Reset", regs, 0); + + return 1; +} |