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232 lines
4.9 KiB
232 lines
4.9 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* FSL SoC setup code |
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* |
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* Maintained by Kumar Gala (see MAINTAINERS for contact information) |
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* |
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* 2006 (c) MontaVista Software, Inc. |
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* Vitaly Bordug <[email protected]> |
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*/ |
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#include <linux/stddef.h> |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/errno.h> |
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#include <linux/major.h> |
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#include <linux/delay.h> |
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#include <linux/irq.h> |
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#include <linux/export.h> |
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#include <linux/device.h> |
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#include <linux/platform_device.h> |
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#include <linux/of.h> |
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#include <linux/of_platform.h> |
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#include <linux/phy.h> |
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#include <linux/spi/spi.h> |
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#include <linux/fsl_devices.h> |
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#include <linux/fs_enet_pd.h> |
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#include <linux/fs_uart_pd.h> |
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#include <linux/reboot.h> |
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#include <linux/atomic.h> |
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#include <asm/io.h> |
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#include <asm/irq.h> |
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#include <asm/time.h> |
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#include <asm/prom.h> |
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#include <asm/machdep.h> |
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#include <sysdev/fsl_soc.h> |
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#include <mm/mmu_decl.h> |
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#include <asm/cpm2.h> |
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#include <asm/fsl_hcalls.h> /* For the Freescale hypervisor */ |
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extern void init_fcc_ioports(struct fs_platform_info*); |
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extern void init_fec_ioports(struct fs_platform_info*); |
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extern void init_smc_ioports(struct fs_uart_platform_info*); |
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static phys_addr_t immrbase = -1; |
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phys_addr_t get_immrbase(void) |
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{ |
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struct device_node *soc; |
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if (immrbase != -1) |
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return immrbase; |
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soc = of_find_node_by_type(NULL, "soc"); |
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if (soc) { |
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int size; |
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u32 naddr; |
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const __be32 *prop = of_get_property(soc, "#address-cells", &size); |
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if (prop && size == 4) |
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naddr = be32_to_cpup(prop); |
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else |
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naddr = 2; |
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prop = of_get_property(soc, "ranges", &size); |
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if (prop) |
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immrbase = of_translate_address(soc, prop + naddr); |
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of_node_put(soc); |
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} |
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return immrbase; |
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} |
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EXPORT_SYMBOL(get_immrbase); |
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u32 fsl_get_sys_freq(void) |
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{ |
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static u32 sysfreq = -1; |
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struct device_node *soc; |
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if (sysfreq != -1) |
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return sysfreq; |
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soc = of_find_node_by_type(NULL, "soc"); |
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if (!soc) |
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return -1; |
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of_property_read_u32(soc, "clock-frequency", &sysfreq); |
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if (sysfreq == -1 || !sysfreq) |
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of_property_read_u32(soc, "bus-frequency", &sysfreq); |
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of_node_put(soc); |
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return sysfreq; |
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} |
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EXPORT_SYMBOL(fsl_get_sys_freq); |
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#if defined(CONFIG_CPM) || defined(CONFIG_QUICC_ENGINE) |
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u32 get_brgfreq(void) |
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{ |
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static u32 brgfreq = -1; |
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struct device_node *node; |
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if (brgfreq != -1) |
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return brgfreq; |
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node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg"); |
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if (node) { |
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of_property_read_u32(node, "clock-frequency", &brgfreq); |
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of_node_put(node); |
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return brgfreq; |
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} |
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/* Legacy device binding -- will go away when no users are left. */ |
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node = of_find_node_by_type(NULL, "cpm"); |
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if (!node) |
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node = of_find_compatible_node(NULL, NULL, "fsl,qe"); |
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if (!node) |
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node = of_find_node_by_type(NULL, "qe"); |
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if (node) { |
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of_property_read_u32(node, "brg-frequency", &brgfreq); |
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if (brgfreq == -1 || !brgfreq) |
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if (!of_property_read_u32(node, "bus-frequency", |
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&brgfreq)) |
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brgfreq /= 2; |
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of_node_put(node); |
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} |
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return brgfreq; |
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} |
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EXPORT_SYMBOL(get_brgfreq); |
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u32 get_baudrate(void) |
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{ |
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static u32 fs_baudrate = -1; |
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struct device_node *node; |
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if (fs_baudrate != -1) |
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return fs_baudrate; |
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node = of_find_node_by_type(NULL, "serial"); |
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if (node) { |
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of_property_read_u32(node, "current-speed", &fs_baudrate); |
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of_node_put(node); |
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} |
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return fs_baudrate; |
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} |
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EXPORT_SYMBOL(get_baudrate); |
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#endif /* CONFIG_CPM2 */ |
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#if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx) |
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static __be32 __iomem *rstcr; |
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static int fsl_rstcr_restart(struct notifier_block *this, |
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unsigned long mode, void *cmd) |
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{ |
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local_irq_disable(); |
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/* set reset control register */ |
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out_be32(rstcr, 0x2); /* HRESET_REQ */ |
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return NOTIFY_DONE; |
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} |
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static int __init setup_rstcr(void) |
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{ |
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struct device_node *np; |
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static struct notifier_block restart_handler = { |
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.notifier_call = fsl_rstcr_restart, |
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.priority = 128, |
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}; |
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for_each_node_by_name(np, "global-utilities") { |
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if ((of_get_property(np, "fsl,has-rstcr", NULL))) { |
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rstcr = of_iomap(np, 0) + 0xb0; |
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if (!rstcr) { |
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printk (KERN_ERR "Error: reset control " |
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"register not mapped!\n"); |
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} else { |
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register_restart_handler(&restart_handler); |
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} |
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break; |
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} |
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} |
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of_node_put(np); |
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return 0; |
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} |
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arch_initcall(setup_rstcr); |
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#endif |
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#if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE) |
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struct platform_diu_data_ops diu_ops; |
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EXPORT_SYMBOL(diu_ops); |
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#endif |
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#ifdef CONFIG_EPAPR_PARAVIRT |
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/* |
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* Restart the current partition |
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* |
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* This function should be assigned to the ppc_md.restart function pointer, |
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* to initiate a partition restart when we're running under the Freescale |
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* hypervisor. |
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*/ |
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void __noreturn fsl_hv_restart(char *cmd) |
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{ |
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pr_info("hv restart\n"); |
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fh_partition_restart(-1); |
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while (1) ; |
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} |
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/* |
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* Halt the current partition |
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* |
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* This function should be assigned to the pm_power_off and ppc_md.halt |
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* function pointers, to shut down the partition when we're running under |
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* the Freescale hypervisor. |
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*/ |
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void __noreturn fsl_hv_halt(void) |
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{ |
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pr_info("hv exit\n"); |
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fh_partition_stop(-1); |
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while (1) ; |
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} |
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#endif
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