diff options
| -rw-r--r-- | arch/powerpc/cpu/mpc8xx/Kconfig | 25 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc8xx/Makefile | 1 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc8xx/micropatch_usb_sof.c | 38 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/cpm_8xx.h | 7 |
4 files changed, 71 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc8xx/Kconfig b/arch/powerpc/cpu/mpc8xx/Kconfig index bfd903b..52caf06 100644 --- a/arch/powerpc/cpu/mpc8xx/Kconfig +++ b/arch/powerpc/cpu/mpc8xx/Kconfig @@ -30,6 +30,31 @@ config MPC885 endchoice +choice + prompt "Microcode patch selection" + default NO_UCODE_PATCH + help + This allows loading of CPM microcode. + + Only one microcode can be loaded at a time. + +config NO_UCODE_PATCH + bool "None" + +config USB_SOF_UCODE_PATCH + bool "USB SOF patch" + depends on MPC885 + help + This microcode fixes CPM15 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. + +endchoice + comment "Specific commands" config CMD_IMMAP diff --git a/arch/powerpc/cpu/mpc8xx/Makefile b/arch/powerpc/cpu/mpc8xx/Makefile index 8918a26..5a6561e 100644 --- a/arch/powerpc/cpu/mpc8xx/Makefile +++ b/arch/powerpc/cpu/mpc8xx/Makefile @@ -12,3 +12,4 @@ obj-$(CONFIG_CMD_IMMAP) += immap.o obj-y += interrupts.o obj-y += speed.o obj-y += cache.o +obj-$(CONFIG_USB_SOF_UCODE_PATCH) += micropatch_usb_sof.o diff --git a/arch/powerpc/cpu/mpc8xx/micropatch_usb_sof.c b/arch/powerpc/cpu/mpc8xx/micropatch_usb_sof.c new file mode 100644 index 0000000..7fc640d --- /dev/null +++ b/arch/powerpc/cpu/mpc8xx/micropatch_usb_sof.c @@ -0,0 +1,38 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Microcode patches for the CPM as supplied by Motorola. + */ + +#include <linux/string.h> +#include <linux/io.h> +#include <asm/immap_8xx.h> +#include <asm/cpm_8xx.h> + +/* + * USB SOF patch arrays. + */ +static uint patch_2000[] = { + 0x7fff0000, 0x7ffd0000, 0x7ffb0000, 0x49f7ba5b, + 0xba383ffb, 0xf9b8b46d, 0xe5ab4e07, 0xaf77bffe, + 0x3f7bbf79, 0xba5bba38, 0xe7676076, 0x60750000 +}; + +static uint patch_2f00[] = { + 0x3030304c, 0xcab9e441, 0xa1aaf220 +}; + +void cpm_load_patch(cpm8xx_t __iomem *cp) +{ + out_be16(&cp->cp_rccr, 0); + + memcpy_toio(cp->cp_dpmem, patch_2000, sizeof(patch_2000)); + memcpy_toio(cp->cp_dpmem + 0xf00, patch_2f00, sizeof(patch_2f00)); + + out_be16(&cp->cp_cpmcr1, 0); + out_be16(&cp->cp_cpmcr2, 0); + out_be16(&cp->cp_cpmcr3, 0); + out_be16(&cp->cp_cpmcr4, 0); + + out_be16(&cp->cp_rccr, 9); +} diff --git a/arch/powerpc/include/asm/cpm_8xx.h b/arch/powerpc/include/asm/cpm_8xx.h index 77ffcce..98476cd 100644 --- a/arch/powerpc/include/asm/cpm_8xx.h +++ b/arch/powerpc/include/asm/cpm_8xx.h @@ -684,4 +684,11 @@ void irq_install_handler(int vec, void (*handler)(void *), void *dev_id); #define CICR_HP_MASK ((uint)0x00001f00) /* Hi-pri int. */ #define CICR_IEN ((uint)0x00000080) /* Int. enable */ #define CICR_SPS ((uint)0x00000001) /* SCC Spread */ + +#ifdef CONFIG_NO_UCODE_PATCH +static inline void cpm_load_patch(cpm8xx_t __iomem *cp) { } +#else +void cpm_load_patch(cpm8xx_t __iomem *cp); +#endif + #endif /* __CPM_8XX__ */ |