diff options
Diffstat (limited to 'kernel/arch/powerpc/sysdev/fsl_soc.c')
| -rw-r--r-- | kernel/arch/powerpc/sysdev/fsl_soc.c | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/kernel/arch/powerpc/sysdev/fsl_soc.c b/kernel/arch/powerpc/sysdev/fsl_soc.c new file mode 100644 index 000000000..99269c041 --- /dev/null +++ b/kernel/arch/powerpc/sysdev/fsl_soc.c @@ -0,0 +1,249 @@ +/* + * FSL SoC setup code + * + * Maintained by Kumar Gala (see MAINTAINERS for contact information) + * + * 2006 (c) MontaVista Software, Inc. + * Vitaly Bordug <vbordug@ru.mvista.com> + * + * 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/init.h> +#include <linux/errno.h> +#include <linux/major.h> +#include <linux/delay.h> +#include <linux/irq.h> +#include <linux/export.h> +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/phy.h> +#include <linux/spi/spi.h> +#include <linux/fsl_devices.h> +#include <linux/fs_enet_pd.h> +#include <linux/fs_uart_pd.h> + +#include <linux/atomic.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/time.h> +#include <asm/prom.h> +#include <asm/machdep.h> +#include <sysdev/fsl_soc.h> +#include <mm/mmu_decl.h> +#include <asm/cpm2.h> +#include <asm/fsl_hcalls.h> /* For the Freescale hypervisor */ + +extern void init_fcc_ioports(struct fs_platform_info*); +extern void init_fec_ioports(struct fs_platform_info*); +extern void init_smc_ioports(struct fs_uart_platform_info*); +static phys_addr_t immrbase = -1; + +phys_addr_t get_immrbase(void) +{ + struct device_node *soc; + + if (immrbase != -1) + return immrbase; + + soc = of_find_node_by_type(NULL, "soc"); + if (soc) { + int size; + u32 naddr; + const __be32 *prop = of_get_property(soc, "#address-cells", &size); + + if (prop && size == 4) + naddr = be32_to_cpup(prop); + else + naddr = 2; + + prop = of_get_property(soc, "ranges", &size); + if (prop) + immrbase = of_translate_address(soc, prop + naddr); + + of_node_put(soc); + } + + return immrbase; +} + +EXPORT_SYMBOL(get_immrbase); + +static u32 sysfreq = -1; + +u32 fsl_get_sys_freq(void) +{ + struct device_node *soc; + const u32 *prop; + int size; + + if (sysfreq != -1) + return sysfreq; + + soc = of_find_node_by_type(NULL, "soc"); + if (!soc) + return -1; + + prop = of_get_property(soc, "clock-frequency", &size); + if (!prop || size != sizeof(*prop) || *prop == 0) + prop = of_get_property(soc, "bus-frequency", &size); + + if (prop && size == sizeof(*prop)) + sysfreq = *prop; + + of_node_put(soc); + return sysfreq; +} +EXPORT_SYMBOL(fsl_get_sys_freq); + +#if defined(CONFIG_CPM2) || defined(CONFIG_QUICC_ENGINE) || defined(CONFIG_8xx) + +static u32 brgfreq = -1; + +u32 get_brgfreq(void) +{ + struct device_node *node; + const unsigned int *prop; + int size; + + if (brgfreq != -1) + return brgfreq; + + node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg"); + if (node) { + prop = of_get_property(node, "clock-frequency", &size); + if (prop && size == 4) + brgfreq = *prop; + + of_node_put(node); + return brgfreq; + } + + /* Legacy device binding -- will go away when no users are left. */ + node = of_find_node_by_type(NULL, "cpm"); + if (!node) + node = of_find_compatible_node(NULL, NULL, "fsl,qe"); + if (!node) + node = of_find_node_by_type(NULL, "qe"); + + if (node) { + prop = of_get_property(node, "brg-frequency", &size); + if (prop && size == 4) + brgfreq = *prop; + + if (brgfreq == -1 || brgfreq == 0) { + prop = of_get_property(node, "bus-frequency", &size); + if (prop && size == 4) + brgfreq = *prop / 2; + } + of_node_put(node); + } + + return brgfreq; +} + +EXPORT_SYMBOL(get_brgfreq); + +static u32 fs_baudrate = -1; + +u32 get_baudrate(void) +{ + struct device_node *node; + + if (fs_baudrate != -1) + return fs_baudrate; + + node = of_find_node_by_type(NULL, "serial"); + if (node) { + int size; + const unsigned int *prop = of_get_property(node, + "current-speed", &size); + + if (prop) + fs_baudrate = *prop; + of_node_put(node); + } + + return fs_baudrate; +} + +EXPORT_SYMBOL(get_baudrate); +#endif /* CONFIG_CPM2 */ + +#if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx) +static __be32 __iomem *rstcr; + +static int __init setup_rstcr(void) +{ + struct device_node *np; + + for_each_node_by_name(np, "global-utilities") { + if ((of_get_property(np, "fsl,has-rstcr", NULL))) { + rstcr = of_iomap(np, 0) + 0xb0; + if (!rstcr) + printk (KERN_ERR "Error: reset control " + "register not mapped!\n"); + break; + } + } + + if (!rstcr && ppc_md.restart == fsl_rstcr_restart) + printk(KERN_ERR "No RSTCR register, warm reboot won't work\n"); + + of_node_put(np); + + return 0; +} + +arch_initcall(setup_rstcr); + +void fsl_rstcr_restart(char *cmd) +{ + local_irq_disable(); + if (rstcr) + /* set reset control register */ + out_be32(rstcr, 0x2); /* HRESET_REQ */ + + while (1) ; +} +#endif + +#if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE) +struct platform_diu_data_ops diu_ops; +EXPORT_SYMBOL(diu_ops); +#endif + +#ifdef CONFIG_EPAPR_PARAVIRT +/* + * Restart the current partition + * + * This function should be assigned to the ppc_md.restart function pointer, + * to initiate a partition restart when we're running under the Freescale + * hypervisor. + */ +void fsl_hv_restart(char *cmd) +{ + pr_info("hv restart\n"); + fh_partition_restart(-1); +} + +/* + * Halt the current partition + * + * This function should be assigned to the pm_power_off and ppc_md.halt + * function pointers, to shut down the partition when we're running under + * the Freescale hypervisor. + */ +void fsl_hv_halt(void) +{ + pr_info("hv exit\n"); + fh_partition_stop(-1); +} +#endif |