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62c5fae511
MPC885 CPU has the following ERRATA: When the USB controller is configured in Host mode, and the SOF generation (SFTE=1 in USMOD register) is being used, there may be false CRC error indication in other SCCs. Although the data is received correctly, the CRC result will be corrupted. Add capability to load the related microcode to fix it. The microcode binary data is copied from Linux kernel. Other microcode will be added in following patch so make it a Kconfig choice. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
38 lines
838 B
C
38 lines
838 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Microcode patches for the CPM as supplied by Motorola.
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*/
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#include <linux/string.h>
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#include <linux/io.h>
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#include <asm/immap_8xx.h>
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#include <asm/cpm_8xx.h>
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/*
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* USB SOF patch arrays.
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*/
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static uint patch_2000[] = {
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0x7fff0000, 0x7ffd0000, 0x7ffb0000, 0x49f7ba5b,
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0xba383ffb, 0xf9b8b46d, 0xe5ab4e07, 0xaf77bffe,
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0x3f7bbf79, 0xba5bba38, 0xe7676076, 0x60750000
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};
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static uint patch_2f00[] = {
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0x3030304c, 0xcab9e441, 0xa1aaf220
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};
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void cpm_load_patch(cpm8xx_t __iomem *cp)
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{
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out_be16(&cp->cp_rccr, 0);
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memcpy_toio(cp->cp_dpmem, patch_2000, sizeof(patch_2000));
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memcpy_toio(cp->cp_dpmem + 0xf00, patch_2f00, sizeof(patch_2f00));
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out_be16(&cp->cp_cpmcr1, 0);
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out_be16(&cp->cp_cpmcr2, 0);
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out_be16(&cp->cp_cpmcr3, 0);
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out_be16(&cp->cp_cpmcr4, 0);
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out_be16(&cp->cp_rccr, 9);
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}
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