diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-01-24 12:50:56 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-01-24 12:50:56 -0800 |
commit | e2464688b59c6ae9928f385dabf5355e30cff298 (patch) | |
tree | 1039fa8c818e6ac16d6f1504c28e80bfe902b0f3 /arch/mips/pic32/pic32mzda/init.c | |
parent | e1c10879ed59436cde537b723545430b04d4dec0 (diff) | |
parent | 07d17f09691e549fac0101333eebe0161a472b50 (diff) |
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS updates from Ralf Baechle:
"This is the main pull request for MIPS for 4.5 plus some 4.4 fixes.
The executive summary:
- ATH79 platform improvments, use DT bindings for the ATH79 USB PHY.
- Avoid useless rebuilds for zboot.
- jz4780: Add NEMC, BCH and NAND device tree nodes
- Initial support for the MicroChip's DT platform. As all the device
drivers are missing this is still of limited use.
- Some Loongson3 cleanups.
- The unavoidable whitespace polishing.
- Reduce clock skew when synchronizing the CPU cycle counters on CPU
startup.
- Add MIPS R6 fixes.
- Lots of cleanups across arch/mips as fallout from KVM.
- Lots of minor fixes and changes for IEEE 754-2008 support to the
FPU emulator / fp-assist software.
- Minor Ralink, BCM47xx and bcm963xx platform support improvments.
- Support SMP on BCM63168"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (84 commits)
MIPS: zboot: Add support for serial debug using the PROM
MIPS: zboot: Avoid useless rebuilds
MIPS: BMIPS: Enable ARCH_WANT_OPTIONAL_GPIOLIB
MIPS: bcm63xx: nvram: Remove unused bcm63xx_nvram_get_psi_size() function
MIPS: bcm963xx: Update bcm_tag field image_sequence
MIPS: bcm963xx: Move extended flash address to bcm_tag header file
MIPS: bcm963xx: Move Broadcom BCM963xx image tag data structure
MIPS: bcm63xx: nvram: Use nvram structure definition from header file
MIPS: bcm963xx: Add Broadcom BCM963xx board nvram data structure
MAINTAINERS: Add KVM for MIPS entry
MIPS: KVM: Add missing newline to kvm_err()
MIPS: Move KVM specific opcodes into asm/inst.h
MIPS: KVM: Use cacheops.h definitions
MIPS: Break down cacheops.h definitions
MIPS: Use EXCCODE_ constants with set_except_vector()
MIPS: Update trap codes
MIPS: Move Cause.ExcCode trap codes to mipsregs.h
MIPS: KVM: Make kvm_mips_{init,exit}() static
MIPS: KVM: Refactor added offsetof()s
MIPS: KVM: Convert EXPORT_SYMBOL to _GPL
...
Diffstat (limited to 'arch/mips/pic32/pic32mzda/init.c')
-rw-r--r-- | arch/mips/pic32/pic32mzda/init.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/arch/mips/pic32/pic32mzda/init.c b/arch/mips/pic32/pic32mzda/init.c new file mode 100644 index 000000000000..775ff90a9962 --- /dev/null +++ b/arch/mips/pic32/pic32mzda/init.c @@ -0,0 +1,156 @@ +/* + * Joshua Henderson, joshua.henderson@microchip.com + * Copyright (C) 2015 Microchip Technology Inc. All rights reserved. + * + * This program is free software; you can distribute it and/or modify it + * under the terms of the GNU General Public License (Version 2) as + * published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/of_address.h> +#include <linux/of_fdt.h> +#include <linux/of_platform.h> +#include <linux/platform_data/sdhci-pic32.h> + +#include <asm/fw/fw.h> +#include <asm/mips-boards/generic.h> +#include <asm/prom.h> + +#include "pic32mzda.h" + +const char *get_system_type(void) +{ + return "PIC32MZDA"; +} + +static ulong get_fdtaddr(void) +{ + ulong ftaddr = 0; + + if ((fw_arg0 == -2) && fw_arg1 && !fw_arg2 && !fw_arg3) + return (ulong)fw_arg1; + + if (__dtb_start < __dtb_end) + ftaddr = (ulong)__dtb_start; + + return ftaddr; +} + +void __init plat_mem_setup(void) +{ + void *dtb; + + dtb = (void *)get_fdtaddr(); + if (!dtb) { + pr_err("pic32: no DTB found.\n"); + return; + } + + /* + * Load the builtin device tree. This causes the chosen node to be + * parsed resulting in our memory appearing. + */ + __dt_setup_arch(dtb); + + pr_info("Found following command lines\n"); + pr_info(" boot_command_line: %s\n", boot_command_line); + pr_info(" arcs_cmdline : %s\n", arcs_cmdline); +#ifdef CONFIG_CMDLINE_BOOL + pr_info(" builtin_cmdline : %s\n", CONFIG_CMDLINE); +#endif + if (dtb != __dtb_start) + strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE); + +#ifdef CONFIG_EARLY_PRINTK + fw_init_early_console(-1); +#endif + pic32_config_init(); +} + +static __init void pic32_init_cmdline(int argc, char *argv[]) +{ + unsigned int count = COMMAND_LINE_SIZE - 1; + int i; + char *dst = &(arcs_cmdline[0]); + char *src; + + for (i = 1; i < argc && count; ++i) { + src = argv[i]; + while (*src && count) { + *dst++ = *src++; + --count; + } + *dst++ = ' '; + } + if (i > 1) + --dst; + + *dst = 0; +} + +void __init prom_init(void) +{ + pic32_init_cmdline((int)fw_arg0, (char **)fw_arg1); +} + +void __init prom_free_prom_memory(void) +{ +} + +void __init device_tree_init(void) +{ + if (!initial_boot_params) + return; + + unflatten_and_copy_device_tree(); +} + +static struct pic32_sdhci_platform_data sdhci_data = { + .setup_dma = pic32_set_sdhci_adma_fifo_threshold, +}; + +static struct of_dev_auxdata pic32_auxdata_lookup[] __initdata = { + OF_DEV_AUXDATA("microchip,pic32mzda-sdhci", 0, "sdhci", &sdhci_data), + { /* sentinel */} +}; + +static int __init pic32_of_prepare_platform_data(struct of_dev_auxdata *lookup) +{ + struct device_node *root, *np; + struct resource res; + + root = of_find_node_by_path("/"); + + for (; lookup->compatible; lookup++) { + np = of_find_compatible_node(NULL, NULL, lookup->compatible); + if (np) { + lookup->name = (char *)np->name; + if (lookup->phys_addr) + continue; + if (!of_address_to_resource(np, 0, &res)) + lookup->phys_addr = res.start; + } + } + + return 0; +} + +static int __init plat_of_setup(void) +{ + if (!of_have_populated_dt()) + panic("Device tree not present"); + + pic32_of_prepare_platform_data(pic32_auxdata_lookup); + if (of_platform_populate(NULL, of_default_bus_match_table, + pic32_auxdata_lookup, NULL)) + panic("Failed to populate DT"); + + return 0; +} +arch_initcall(plat_of_setup); |