From: Benjamin Herrenschmidt Date: Wed, 30 Nov 2005 05:54:12 +0000 (+1100) Subject: [PATCH] powerpc: udbg updates X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=bb6b9b28d6847bc71f910e2e82c9040ff4b97ec0;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git [PATCH] powerpc: udbg updates The udbg low level io layer has an issue with udbg_getc() returning a char (unsigned on ppc) instead of an int, thus the -1 if you had no available input device could end up turned into 0xff, filling your display with bogus characters. This fixes it, along with adding a little blob to xmon to do a delay before exiting when getting an EOF and fixing the detection of ADB keyboards in udbg_adb.c Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c index 9c2a5be7a56a..23c85af53d47 100644 --- a/arch/powerpc/kernel/prom_parse.c +++ b/arch/powerpc/kernel/prom_parse.c @@ -276,7 +276,7 @@ static int of_translate_one(struct device_node *parent, struct of_bus *bus, finish: of_dump_addr("OF: parent translation for:", addr, pna); - DBG("OF: with offset: %lx\n", offset); + DBG("OF: with offset: "PRu64"\n", offset); /* Translate it into parent bus space */ return pbus->translate(addr, offset, pna); diff --git a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c index cc2df5e61bb0..a058285a70e7 100644 --- a/arch/powerpc/kernel/udbg.c +++ b/arch/powerpc/kernel/udbg.c @@ -17,7 +17,7 @@ #include void (*udbg_putc)(char c); -char (*udbg_getc)(void); +int (*udbg_getc)(void); int (*udbg_getc_poll)(void); /* udbg library, used by xmon et al */ @@ -57,8 +57,8 @@ int udbg_write(const char *s, int n) int udbg_read(char *buf, int buflen) { - char c, *p = buf; - int i; + char *p = buf; + int i, c; if (!udbg_getc) return 0; @@ -66,8 +66,11 @@ int udbg_read(char *buf, int buflen) for (i = 0; i < buflen; ++i) { do { c = udbg_getc(); + if (c == -1 && i == 0) + return -1; + } while (c == 0x11 || c == 0x13); - if (c == 0) + if (c == 0 || c == -1) break; *p++ = c; } diff --git a/arch/powerpc/kernel/udbg_16550.c b/arch/powerpc/kernel/udbg_16550.c index 28a58da5592c..e58c048a7b19 100644 --- a/arch/powerpc/kernel/udbg_16550.c +++ b/arch/powerpc/kernel/udbg_16550.c @@ -69,14 +69,14 @@ static int udbg_550_getc_poll(void) return -1; } -static char udbg_550_getc(void) +static int udbg_550_getc(void) { if (udbg_comport) { while ((in_8(&udbg_comport->lsr) & LSR_DR) == 0) /* wait for char */; return in_8(&udbg_comport->rbr); } - return 0; + return -1; } void udbg_init_uart(void __iomem *comport, unsigned int speed, diff --git a/arch/powerpc/platforms/powermac/udbg_adb.c b/arch/powerpc/platforms/powermac/udbg_adb.c index 3d5ed23bf0e0..06c8265c2baf 100644 --- a/arch/powerpc/platforms/powermac/udbg_adb.c +++ b/arch/powerpc/platforms/powermac/udbg_adb.c @@ -29,7 +29,7 @@ */ static void (*udbg_adb_old_putc)(char c); -static char (*udbg_adb_old_getc)(void); +static int (*udbg_adb_old_getc)(void); static int (*udbg_adb_old_getc_poll)(void); static enum { @@ -73,7 +73,7 @@ static unsigned char xmon_shift_keytab[128] = "\0.\0*\0+\0\0\0\0\0/\r\0-\0" /* 0x40 - 0x4f */ "\0\0000123456789\0\0\0"; /* 0x50 - 0x5f */ -static char udbg_adb_local_getc(void) +static int udbg_adb_local_getc(void) { int k, t, on; @@ -116,7 +116,7 @@ static char udbg_adb_local_getc(void) } #endif /* CONFIG_BOOTX_TEXT */ -static char udbg_adb_getc(void) +static int udbg_adb_getc(void) { #ifdef CONFIG_BOOTX_TEXT if (udbg_adb_use_btext && input_type != input_adb_none) @@ -195,7 +195,7 @@ int udbg_adb_init(int force_btext) */ for (np = NULL; (np = of_find_node_by_name(np, "keyboard")) != NULL;) { struct device_node *parent = of_get_parent(np); - int found = (parent && !strcmp(parent->type, "adb") == 0); + int found = (parent && strcmp(parent->type, "adb") == 0); of_node_put(parent); if (found) break; diff --git a/arch/powerpc/platforms/powermac/udbg_scc.c b/arch/powerpc/platforms/powermac/udbg_scc.c index df6dec49c4c7..e87d53acfb61 100644 --- a/arch/powerpc/platforms/powermac/udbg_scc.c +++ b/arch/powerpc/platforms/powermac/udbg_scc.c @@ -47,14 +47,14 @@ static int udbg_scc_getc_poll(void) return -1; } -static char udbg_scc_getc(void) +static int udbg_scc_getc(void) { if (sccc) { while ((in_8(sccc) & SCC_RXRDY) == 0) ; return in_8(sccd); } - return 0; + return -1; } static unsigned char scc_inittab[] = { diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c index 615ffb961059..1fe445ab78a6 100644 --- a/arch/powerpc/platforms/pseries/lpar.c +++ b/arch/powerpc/platforms/pseries/lpar.c @@ -112,7 +112,7 @@ static int udbg_hvsi_getc_poll(void) return ch; } -static char udbg_hvsi_getc(void) +static int udbg_hvsi_getc(void) { int ch; for (;;) { @@ -173,7 +173,7 @@ static int udbg_getc_pollLP(void) return ch; } -static char udbg_getcLP(void) +static int udbg_getcLP(void) { int ch; for (;;) { diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index c45a6ad5f3b7..465b75c5647e 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -450,7 +450,6 @@ int xmon_core(struct pt_regs *regs, int fromipi) leave: cpu_clear(cpu, cpus_in_xmon); xmon_fault_jmp[cpu] = NULL; - #else /* UP is simple... */ if (in_xmon) { @@ -805,7 +804,10 @@ cmds(struct pt_regs *excp) break; case 'x': case 'X': + return cmd; case EOF: + printf(" \n"); + mdelay(2000); return cmd; case '?': printf(help_string); diff --git a/drivers/macintosh/via-pmu.c b/drivers/macintosh/via-pmu.c index 13881f199607..d6dabee55f2f 100644 --- a/drivers/macintosh/via-pmu.c +++ b/drivers/macintosh/via-pmu.c @@ -313,7 +313,7 @@ int __init find_via_pmu(void) goto fail; } taddr = of_translate_address(vias, reg); - if (taddr == 0) { + if (taddr == OF_BAD_ADDR) { printk(KERN_ERR "via-pmu: Can't translate address !\n"); goto fail; } @@ -376,7 +376,7 @@ int __init find_via_pmu(void) return 0; } - printk(KERN_INFO "PMU driver %d initialized for %s, firmware: %02x\n", + printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n", PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version); sys_ctrler = SYS_CTRLER_PMU; diff --git a/include/asm-powerpc/udbg.h b/include/asm-powerpc/udbg.h index 8d6b44c8f35d..58cdc883e38c 100644 --- a/include/asm-powerpc/udbg.h +++ b/include/asm-powerpc/udbg.h @@ -14,7 +14,7 @@ #include extern void (*udbg_putc)(char c); -extern char (*udbg_getc)(void); +extern int (*udbg_getc)(void); extern int (*udbg_getc_poll)(void); extern void udbg_puts(const char *s);