mirror of
https://github.com/smaeul/u-boot.git
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132 lines
2.6 KiB
C
132 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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#include <clk.h>
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#include <dm.h>
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#include <remoteproc.h>
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#include <reset.h>
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#include <asm/io.h>
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#include <bl808/mm_misc_reg.h>
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struct bflb_rproc_plat {
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void __iomem *base;
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struct clk clk;
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struct reset_ctl reset;
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};
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static int bflb_rproc_init(struct udevice *dev)
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{
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struct bflb_rproc_plat *plat = dev_get_plat(dev);
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clk_set_rate(&plat->clk, 240000000);
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return 0;
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}
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static int bflb_rproc_load(struct udevice *dev, ulong addr, ulong size)
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{
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struct bflb_rproc_plat *plat = dev_get_plat(dev);
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/* Set the CPU entry point. */
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writel(rproc_elf_get_boot_addr(dev, addr),
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plat->base + MM_MISC_CPU0_BOOT_OFFSET);
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return rproc_elf_load_image(dev, addr, size);
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}
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static int bflb_rproc_start(struct udevice *dev)
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{
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struct bflb_rproc_plat *plat = dev_get_plat(dev);
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int ret;
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reset_assert(&plat->reset);
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ret = clk_enable(&plat->clk);
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if (ret)
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return ret;
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/* Set up the CPU time base. */
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u32 divider = clk_get_rate(&plat->clk) / 1000000 - 1;
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writel(divider | MM_MISC_C906_RTC_RST_MSK,
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plat->base + MM_MISC_CPU_RTC_OFFSET);
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writel(divider | MM_MISC_C906_RTC_EN_MSK,
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plat->base + MM_MISC_CPU_RTC_OFFSET);
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ret = reset_deassert(&plat->reset);
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if (ret)
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goto err_disable_clk;
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return 0;
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err_disable_clk:
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clk_disable(&plat->clk);
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return ret;
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}
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static int bflb_rproc_stop(struct udevice *dev)
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{
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struct bflb_rproc_plat *plat = dev_get_plat(dev);
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reset_assert(&plat->reset);
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clk_disable(&plat->clk);
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return 0;
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}
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static int bflb_rproc_reset(struct udevice *dev)
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{
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bflb_rproc_stop(dev);
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return bflb_rproc_start(dev);
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}
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static int bflb_rproc_is_running(struct udevice *dev)
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{
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struct bflb_rproc_plat *plat = dev_get_plat(dev);
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return reset_status(&plat->reset);
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}
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static const struct dm_rproc_ops bflb_rproc_ops = {
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.init = bflb_rproc_init,
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.load = bflb_rproc_load,
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.start = bflb_rproc_start,
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.stop = bflb_rproc_stop,
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.reset = bflb_rproc_reset,
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.is_running = bflb_rproc_is_running,
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};
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static int bflb_rproc_of_to_plat(struct udevice *dev)
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{
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struct bflb_rproc_plat *plat = dev_get_plat(dev);
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int ret;
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plat->base = dev_remap_addr(dev);
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if (!plat->base)
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return -ENOMEM;
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ret = clk_get_by_index(dev, 0, &plat->clk);
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if (ret)
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return ret;
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ret = reset_get_by_index(dev, 0, &plat->reset);
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if (ret)
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return ret;
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return 0;
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}
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static const struct udevice_id bflb_rproc_ids[] = {
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{ .compatible = "bflb,bl808-mm-misc" },
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{ }
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};
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U_BOOT_DRIVER(bflb_rproc) = {
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.name = "bflb_rproc",
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.id = UCLASS_REMOTEPROC,
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.of_match = bflb_rproc_ids,
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.of_to_plat = bflb_rproc_of_to_plat,
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.plat_auto = sizeof(struct bflb_rproc_plat),
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.ops = &bflb_rproc_ops,
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};
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