diff options
Diffstat (limited to 'board')
| -rw-r--r-- | board/hermes/hermes.c | 1 | ||||
| -rw-r--r-- | board/logodl/logodl.c | 1 | ||||
| -rw-r--r-- | board/pcs440ep/config.mk | 3 | ||||
| -rw-r--r-- | board/pcs440ep/flash.c | 4 | ||||
| -rw-r--r-- | board/pcs440ep/init.S | 41 | ||||
| -rw-r--r-- | board/pcs440ep/pcs440ep.c | 500 | ||||
| -rw-r--r-- | board/pcs440ep/u-boot.lds | 1 | ||||
| -rw-r--r-- | board/sc520_cdp/sc520_cdp.c | 1 | ||||
| -rw-r--r-- | board/sc520_spunk/sc520_spunk.c | 1 |
9 files changed, 529 insertions, 24 deletions
diff --git a/board/hermes/hermes.c b/board/hermes/hermes.c index a523db1..8fd081f 100644 --- a/board/hermes/hermes.c +++ b/board/hermes/hermes.c @@ -597,6 +597,7 @@ void show_boot_progress (int status) { volatile immap_t *immr = (immap_t *) CFG_IMMR; + if (status < -32) status = -1; /* let things compatible */ status ^= 0x0F; status = (status & 0x0F) << 14; immr->im_cpm.cp_pbdat = (immr->im_cpm.cp_pbdat & ~PB_LED_ALL) | status; diff --git a/board/logodl/logodl.c b/board/logodl/logodl.c index 14fd28f..897787b 100644 --- a/board/logodl/logodl.c +++ b/board/logodl/logodl.c @@ -107,6 +107,7 @@ void logodl_set_led(int led, int state) void show_boot_progress (int status) { + if (status < -32) status = -1; /* let things compatible */ /* switch(status) { case 1: logodl_set_led(0,1); break; diff --git a/board/pcs440ep/config.mk b/board/pcs440ep/config.mk index 319c4fa..4d942eb 100644 --- a/board/pcs440ep/config.mk +++ b/board/pcs440ep/config.mk @@ -25,6 +25,9 @@ # PCS440EP board # +# Check the U-Boot Image with a SHA1 checksum +ALL += $(obj)u-boot.sha1 + #TEXT_BASE = 0x00001000 ifeq ($(ramsym),1) diff --git a/board/pcs440ep/flash.c b/board/pcs440ep/flash.c index ece5478..7001440 100644 --- a/board/pcs440ep/flash.c +++ b/board/pcs440ep/flash.c @@ -83,6 +83,7 @@ void flash_print_info(flash_info_t *info) case FLASH_MAN_FUJ: printf ("FUJITSU "); break; case FLASH_MAN_SST: printf ("SST "); break; case FLASH_MAN_EXCEL: printf ("Excel Semiconductor "); break; + case FLASH_MAN_MX: printf ("MXIC "); break; default: printf ("Unknown Vendor "); break; } @@ -195,6 +196,9 @@ static ulong flash_get_size(vu_long *addr, flash_info_t *info) case (CFG_FLASH_WORD_SIZE)EXCEL_MANUFACT: info->flash_id = FLASH_MAN_EXCEL; break; + case (CFG_FLASH_WORD_SIZE)MX_MANUFACT: + info->flash_id = FLASH_MAN_MX; + break; default: info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; diff --git a/board/pcs440ep/init.S b/board/pcs440ep/init.S index 0eee4d8..36a40c9 100644 --- a/board/pcs440ep/init.S +++ b/board/pcs440ep/init.S @@ -87,27 +87,32 @@ .globl tlbtab tlbtab: - tlbtab_start + tlbtab_start - /* - * BOOT_CS (FLASH) must be first. Before relocation SA_I can be off to use the - * speed up boot process. It is patched after relocation to enable SA_I - */ - tlbentry( CFG_BOOT_BASE_ADDR, SZ_256M, CFG_BOOT_BASE_ADDR, 0, AC_R|AC_W|AC_X|SA_G/*|SA_I*/) + /* + * BOOT_CS (FLASH) must be first. Before relocation SA_I can be off to use the + * speed up boot process. It is patched after relocation to enable SA_I + */ + tlbentry( CFG_BOOT_BASE_ADDR, SZ_256M, CFG_BOOT_BASE_ADDR, 0, AC_R|AC_W|AC_X|SA_G/*|SA_I*/) - /* TLB-entry for init-ram in dcache (SA_I must be turned off!) */ - tlbentry( CFG_INIT_RAM_ADDR, SZ_64K, CFG_INIT_RAM_ADDR, 0, AC_R|AC_W|AC_X|SA_G ) + /* TLB-entry for init-ram in dcache (SA_I must be turned off!) */ + tlbentry( CFG_INIT_RAM_ADDR, SZ_64K, CFG_INIT_RAM_ADDR, 0, AC_R|AC_W|AC_X|SA_G ) - tlbentry( CFG_SDRAM_BASE, SZ_256M, CFG_SDRAM_BASE, 0, AC_R|AC_W|AC_X|SA_G|SA_I ) - tlbentry( CFG_PCI_BASE, SZ_256M, CFG_PCI_BASE, 0, AC_R|AC_W|SA_G|SA_I ) + /* + * TLB entries for SDRAM are not needed on this platform. + * They are dynamically generated in the SPD DDR detection + * routine. + */ - /* PCI */ - tlbentry( CFG_PCI_MEMBASE, SZ_256M, CFG_PCI_MEMBASE, 0, AC_R|AC_W|SA_G|SA_I ) - tlbentry( CFG_PCI_MEMBASE1, SZ_256M, CFG_PCI_MEMBASE1, 0, AC_R|AC_W|SA_G|SA_I ) - tlbentry( CFG_PCI_MEMBASE2, SZ_256M, CFG_PCI_MEMBASE2, 0, AC_R|AC_W|SA_G|SA_I ) - tlbentry( CFG_PCI_MEMBASE3, SZ_256M, CFG_PCI_MEMBASE3, 0, AC_R|AC_W|SA_G|SA_I ) + tlbentry( CFG_PCI_BASE, SZ_256M, CFG_PCI_BASE, 0, AC_R|AC_W|SA_G|SA_I ) - /* USB 2.0 Device */ - tlbentry( CFG_USB_DEVICE, SZ_1K, 0x50000000, 0, AC_R|AC_W|SA_G|SA_I ) + /* PCI */ + tlbentry( CFG_PCI_MEMBASE, SZ_256M, CFG_PCI_MEMBASE, 0, AC_R|AC_W|SA_G|SA_I ) + tlbentry( CFG_PCI_MEMBASE1, SZ_256M, CFG_PCI_MEMBASE1, 0, AC_R|AC_W|SA_G|SA_I ) + tlbentry( CFG_PCI_MEMBASE2, SZ_256M, CFG_PCI_MEMBASE2, 0, AC_R|AC_W|SA_G|SA_I ) + tlbentry( CFG_PCI_MEMBASE3, SZ_256M, CFG_PCI_MEMBASE3, 0, AC_R|AC_W|SA_G|SA_I ) - tlbtab_end + /* USB 2.0 Device */ + tlbentry( CFG_USB_DEVICE, SZ_1K, 0x50000000, 0, AC_R|AC_W|SA_G|SA_I ) + + tlbtab_end diff --git a/board/pcs440ep/pcs440ep.c b/board/pcs440ep/pcs440ep.c index 8858f0a..f638589 100644 --- a/board/pcs440ep/pcs440ep.c +++ b/board/pcs440ep/pcs440ep.c @@ -23,19 +23,111 @@ #include <common.h> #include <ppc4xx.h> +#include <malloc.h> +#include <command.h> +#include <crc.h> #include <asm/processor.h> #include <spd_sdram.h> +#include <status_led.h> +#include <sha1.h> DECLARE_GLOBAL_DATA_PTR; extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ -static void set_leds(int val) +unsigned char sha1_checksum[SHA1_SUM_LEN]; + +/* swap 4 Bits (Bit0 = Bit3, Bit1 = Bit2, Bit2 = Bit1 and Bit3 = Bit0) */ +unsigned char swapbits[16] = {0x0, 0x8, 0x4, 0xc, 0x2, 0xa, 0x6, 0xe, + 0x1, 0x9, 0x5, 0xd, 0x3, 0xb, 0x7, 0xf}; + +static void set_leds (int val) +{ + out32(GPIO0_OR, (in32 (GPIO0_OR) & ~0x78000000) | (val << 27)); +} + +#define GET_LEDS ((in32 (GPIO0_OR) & 0x78000000) >> 27) + +void __led_init (led_id_t mask, int state) +{ + int val = GET_LEDS; + + if (state == STATUS_LED_ON) + val |= mask; + else + val &= ~mask; + set_leds (val); +} + +void __led_set (led_id_t mask, int state) +{ + int val = GET_LEDS; + + if (state == STATUS_LED_ON) + val |= mask; + else if (state == STATUS_LED_OFF) + val &= ~mask; + set_leds (val); +} + +void __led_toggle (led_id_t mask) +{ + int val = GET_LEDS; + + val ^= mask; + set_leds (val); +} + +static void status_led_blink (void) +{ + int i; + int val = GET_LEDS; + + /* set all LED which are on, to state BLINKING */ + for (i = 0; i < 4; i++) { + if (val & 0x08) status_led_set (i, STATUS_LED_BLINKING); + val = val << 1; + } +} + +#if defined(CONFIG_SHOW_BOOT_PROGRESS) +void show_boot_progress (int val) { - unsigned char led[16] = {0x0, 0x8, 0x4, 0xc, 0x2, 0xa, 0x6, 0xe, - 0x1, 0x9, 0x5, 0xd, 0x3, 0xb, 0x7, 0xf}; - out32(GPIO0_OR, (in32(GPIO0_OR) & ~0x78000000) | (led[val] << 27)); + /* find all valid Codes for val in README */ + if (val == -30) return; + if (val < 0) { + /* smthing goes wrong */ + status_led_blink (); + return; + } + switch (val) { + case 1: + /* validating Image */ + status_led_set (0, STATUS_LED_OFF); + status_led_set (1, STATUS_LED_ON); + status_led_set (2, STATUS_LED_ON); + break; + case 15: + /* booting */ + status_led_set (0, STATUS_LED_ON); + status_led_set (1, STATUS_LED_ON); + status_led_set (2, STATUS_LED_ON); + break; + case 64: + /* starting Ethernet configuration */ + status_led_set (0, STATUS_LED_OFF); + status_led_set (1, STATUS_LED_OFF); + status_led_set (2, STATUS_LED_ON); + break; + case 80: + /* loading Image */ + status_led_set (0, STATUS_LED_ON); + status_led_set (1, STATUS_LED_OFF); + status_led_set (2, STATUS_LED_ON); + break; + } } +#endif int board_early_init_f(void) { @@ -85,6 +177,252 @@ int board_early_init_f(void) return 0; } +#define EEPROM_LEN 256 +void load_sernum_ethaddr (void) +{ + int ret; + char buf[EEPROM_LEN]; + char mac[32]; + char *use_eeprom; + u16 checksumcrc16 = 0; + + /* read the MACs from EEprom */ + status_led_set (0, STATUS_LED_ON); + status_led_set (1, STATUS_LED_ON); + ret = eeprom_read (CFG_I2C_EEPROM_ADDR, 0, (uchar *)buf, EEPROM_LEN); + if (ret == 0) { + checksumcrc16 = cyg_crc16 ((uchar *)buf, EEPROM_LEN - 2); + /* check, if the EEprom is programmed: + * - The Prefix(Byte 0,1,2) is equal to "ATR" + * - The checksum, stored in the last 2 Bytes, is correct + */ + if ((strncmp (buf,"ATR",3) != 0) || + ((checksumcrc16 >> 8) != buf[EEPROM_LEN - 2]) || + ((checksumcrc16 & 0xff) != buf[EEPROM_LEN - 1])) + { + /* EEprom is not programmed */ + printf("%s: EEPROM Checksum not OK\n", __FUNCTION__); + } else { + /* get the MACs */ + sprintf (mac, "%02x:%02x:%02x:%02x:%02x:%02x", + buf[3], + buf[4], + buf[5], + buf[6], + buf[7], + buf[8]); + setenv ("ethaddr", (char *) mac); + sprintf (mac, "%02x:%02x:%02x:%02x:%02x:%02x", + buf[9], + buf[10], + buf[11], + buf[12], + buf[13], + buf[14]); + setenv ("eth1addr", (char *) mac); + return; + } + } + + /* some error reading the EEprom */ + if ((use_eeprom = getenv ("use_eeprom_ethaddr")) == NULL) { + /* dont use bootcmd */ + setenv("bootdelay", "-1"); + return; + } + /* == default ? use standard */ + if (strncmp (use_eeprom, "default", 7) == 0) { + return; + } + /* Env doesnt exist -> hang */ + status_led_blink (); + hang (); + return; +} + +#ifdef CONFIG_PREBOOT + +static uchar kbd_magic_prefix[] = "key_magic"; +static uchar kbd_command_prefix[] = "key_cmd"; + +struct kbd_data_t { + char s1; + char s2; +}; + +struct kbd_data_t* get_keys (struct kbd_data_t *kbd_data) +{ + char *val; + unsigned long tmp; + + /* use the DIPs for some bootoptions */ + val = getenv (ENV_NAME_DIP); + tmp = simple_strtoul (val, NULL, 16); + + kbd_data->s2 = (tmp & 0x0f); + kbd_data->s1 = (tmp & 0xf0) >> 4; + return kbd_data; +} + +static int compare_magic (const struct kbd_data_t *kbd_data, char *str) +{ + char s1 = str[0]; + + if (s1 >= '0' && s1 <= '9') + s1 -= '0'; + else if (s1 >= 'a' && s1 <= 'f') + s1 = s1 - 'a' + 10; + else if (s1 >= 'A' && s1 <= 'F') + s1 = s1 - 'A' + 10; + else + return -1; + + if (s1 != kbd_data->s1) return -1; + + s1 = str[1]; + if (s1 >= '0' && s1 <= '9') + s1 -= '0'; + else if (s1 >= 'a' && s1 <= 'f') + s1 = s1 - 'a' + 10; + else if (s1 >= 'A' && s1 <= 'F') + s1 = s1 - 'A' + 10; + else + return -1; + + if (s1 != kbd_data->s2) return -1; + return 0; +} + +static char *key_match (const struct kbd_data_t *kbd_data) +{ + char magic[sizeof (kbd_magic_prefix) + 1]; + char *suffix; + char *kbd_magic_keys; + + /* + * The following string defines the characters that can be appended + * to "key_magic" to form the names of environment variables that + * hold "magic" key codes, i. e. such key codes that can cause + * pre-boot actions. If the string is empty (""), then only + * "key_magic" is checked (old behaviour); the string "125" causes + * checks for "key_magic1", "key_magic2" and "key_magic5", etc. + */ + if ((kbd_magic_keys = getenv ("magic_keys")) == NULL) + kbd_magic_keys = ""; + + /* loop over all magic keys; + * use '\0' suffix in case of empty string + */ + for (suffix = kbd_magic_keys; *suffix || + suffix == kbd_magic_keys; ++suffix) { + sprintf (magic, "%s%c", kbd_magic_prefix, *suffix); + if (compare_magic (kbd_data, getenv (magic)) == 0) { + char cmd_name[sizeof (kbd_command_prefix) + 1]; + char *cmd; + + sprintf (cmd_name, "%s%c", kbd_command_prefix, *suffix); + cmd = getenv (cmd_name); + + return (cmd); + } + } + return (NULL); +} + +#endif /* CONFIG_PREBOOT */ + +static int pcs440ep_readinputs (void) +{ + int i; + char value[20]; + + /* read the inputs and set the Envvars */ + /* Revision Level Bit 26 - 29 */ + i = ((in32 (GPIO0_IR) & 0x0000003c) >> 2); + i = swapbits[i]; + sprintf (value, "%02x", i); + setenv (ENV_NAME_REVLEV, value); + /* Solder Switch Bit 30 - 33 */ + i = (in32 (GPIO0_IR) & 0x00000003) << 2; + i += (in32 (GPIO1_IR) & 0xc0000000) >> 30; + i = swapbits[i]; + sprintf (value, "%02x", i); + setenv (ENV_NAME_SOLDER, value); + /* DIP Switch Bit 49 - 56 */ + i = ((in32 (GPIO1_IR) & 0x00007f80) >> 7); + i = (swapbits[i & 0x0f] << 4) + swapbits[(i & 0xf0) >> 4]; + sprintf (value, "%02x", i); + setenv (ENV_NAME_DIP, value); + return 0; +} + + +#if defined(CONFIG_SHA1_CHECK_UB_IMG) +/************************************************************************* + * calculate a SHA1 sum for the U-Boot image in Flash. + * + ************************************************************************/ +static int pcs440ep_sha1 (int docheck) +{ + unsigned char *data; + unsigned char *ptroff; + unsigned char output[20]; + unsigned char org[20]; + int i, len = CONFIG_SHA1_LEN; + + memcpy ((char *)CFG_LOAD_ADDR, (char *)CONFIG_SHA1_START, len); + data = (unsigned char *)CFG_LOAD_ADDR; + ptroff = &data[len + SHA1_SUM_POS]; + + for (i = 0; i < SHA1_SUM_LEN; i++) { + org[i] = ptroff[i]; + ptroff[i] = 0; + } + + sha1_csum ((unsigned char *) data, len, (unsigned char *)output); + + if (docheck == 2) { + for (i = 0; i < 20 ; i++) { + printf("%02X ", output[i]); + } + printf("\n"); + } + if (docheck == 1) { + for (i = 0; i < 20 ; i++) { + if (org[i] != output[i]) return 1; + } + } + return 0; +} + +/************************************************************************* + * do some checks after the SHA1 checksum from the U-Boot Image was + * calculated. + * + ************************************************************************/ +static void pcs440ep_checksha1 (void) +{ + int ret; + char *cs_test; + + ret = pcs440ep_sha1 (1); + if (ret == 0) return; + + if ((cs_test = getenv ("cs_test")) == NULL) { + /* Env doesnt exist -> hang */ + status_led_blink (); + hang (); + } + + if (strncmp (cs_test, "off", 3) == 0) { + printf ("SHA1 U-Boot sum NOT ok!\n"); + setenv ("bootdelay", "-1"); + } +} +#else +static __inline__ void pcs440ep_checksha1 (void) { do {} while (0);} +#endif + int misc_init_r (void) { uint pbcr; @@ -139,6 +477,18 @@ int misc_init_r (void) CFG_ENV_ADDR_REDUND + 2*CFG_ENV_SECT_SIZE - 1, &flash_info[1]); + pcs440ep_readinputs (); + pcs440ep_checksha1 (); +#ifdef CONFIG_PREBOOT + { + struct kbd_data_t kbd_data; + /* Decode keys */ + char *str = strdup (key_match (get_keys (&kbd_data))); + /* Set or delete definition */ + setenv ("preboot", str); + free (str); + } +#endif /* CONFIG_PREBOOT */ return 0; } @@ -156,13 +506,34 @@ int checkboard(void) return (0); } + +#if defined(CONFIG_PPC4xx_USE_SPD_DDR_INIT_HANG) +void spd_ddr_init_hang (void) +{ + status_led_set (0, STATUS_LED_OFF); + status_led_set (1, STATUS_LED_ON); + /* we cannot use hang() because we are still running from + Flash, and so the status_led driver is not initialized */ + puts ("### ERROR ### Please RESET the board ###\n"); + for (;;) { + __led_toggle (4); + udelay (100000); + } +} +#endif + long int initdram (int board_type) { long dram_size = 0; - set_leds(1); /* display boot info counter */ + status_led_set (0, STATUS_LED_ON); + status_led_set (1, STATUS_LED_OFF); dram_size = spd_sdram(); - set_leds(2); /* display boot info counter */ + status_led_set (0, STATUS_LED_OFF); + status_led_set (1, STATUS_LED_ON); + if (dram_size == 0) { + hang(); + } return dram_size; } @@ -377,3 +748,120 @@ void hw_watchdog_reset(void) } #endif + +/************************************************************************* + * "led" Commando for the U-Boot shell + * + ************************************************************************/ +int do_led (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + int rcode = 0; + ulong pattern = 0; + + pattern = simple_strtoul (argv[1], NULL, 10); + if (pattern > 200) { + status_led_blink (); + hang (); + return rcode; + } + if (pattern > 100) { + status_led_blink (); + return rcode; + } + pattern &= 0x0f; + set_leds (pattern); + return rcode; +} + +U_BOOT_CMD( + led, 2, 1, do_led, + "led - set the led\n", + NULL +); + +#if defined(CONFIG_SHA1_CHECK_UB_IMG) +/************************************************************************* + * "sha1" Commando for the U-Boot shell + * + ************************************************************************/ +int do_sha1 (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + int rcode = -1; + + if (argc < 2) { + usage: + printf ("Usage:\n%s\n", cmdtp->usage); + return 1; + } + + if (argc >= 3) { + unsigned char *data; + unsigned char output[20]; + int len; + int i; + + data = (unsigned char *)simple_strtoul (argv[1], NULL, 16); + len = simple_strtoul (argv[2], NULL, 16); + sha1_csum (data, len, (unsigned char *)output); + printf ("U-Boot sum:\n"); + for (i = 0; i < 20 ; i++) { + printf ("%02X ", output[i]); + } + printf ("\n"); + if (argc == 4) { + data = (unsigned char *)simple_strtoul (argv[3], NULL, 16); + memcpy (data, output, 20); + } + return 0; + } + if (argc == 2) { + char *ptr = argv[1]; + if (*ptr != '-') goto usage; + ptr++; + if ((*ptr == 'c') || (*ptr == 'C')) { + rcode = pcs440ep_sha1 (1); + printf ("SHA1 U-Boot sum %sok!\n", (rcode != 0) ? "not " : ""); + } else if ((*ptr == 'p') || (*ptr == 'P')) { + rcode = pcs440ep_sha1 (2); + } else { + rcode = pcs440ep_sha1 (0); + } + return rcode; + } + return rcode; +} + +U_BOOT_CMD( + sha1, 4, 1, do_sha1, + "sha1 - calculate the SHA1 Sum\n", + "address len [addr] calculate the SHA1 sum [save at addr]\n" + " -p calculate the SHA1 sum from the U-Boot image in flash and print\n" + " -c check the U-Boot image in flash\n" +); +#endif + +#ifdef CONFIG_IDE_PREINIT +int ide_preinit (void) +{ + /* Set True IDE Mode */ + out32 (GPIO0_OR, (in32 (GPIO0_OR) | 0x00100000)); + out32 (GPIO0_OR, (in32 (GPIO0_OR) | 0x00200000)); + out32 (GPIO1_OR, (in32 (GPIO1_OR) & ~0x00008040)); + udelay (100000); + return 0; +} +#endif + +#if defined (CFG_CMD_IDE) && defined (CONFIG_IDE_RESET) +void ide_set_reset (int idereset) +{ + debug ("ide_reset(%d)\n", idereset); + if (idereset == 0) { + out32 (GPIO0_OR, (in32 (GPIO0_OR) | 0x00200000)); + } else { + out32 (GPIO0_OR, (in32 (GPIO0_OR) & ~0x00200000)); + } + udelay (10000); +} +#endif /* defined (CFG_CMD_IDE) && defined (CONFIG_IDE_RESET) */ + diff --git a/board/pcs440ep/u-boot.lds b/board/pcs440ep/u-boot.lds index 6ab476a..6506ccd 100644 --- a/board/pcs440ep/u-boot.lds +++ b/board/pcs440ep/u-boot.lds @@ -65,6 +65,7 @@ SECTIONS { cpu/ppc4xx/start.o (.text) board/pcs440ep/init.o (.text) + lib_generic/sha1.o (.text) *(.text) *(.fixup) diff --git a/board/sc520_cdp/sc520_cdp.c b/board/sc520_cdp/sc520_cdp.c index b6add59..f6f0e72 100644 --- a/board/sc520_cdp/sc520_cdp.c +++ b/board/sc520_cdp/sc520_cdp.c @@ -507,6 +507,7 @@ int dram_init(void) void show_boot_progress(int val) { + if (val < -32) val = -1; /* let things compatible */ outb(val&0xff, 0x80); outb((val&0xff00)>>8, 0x680); } diff --git a/board/sc520_spunk/sc520_spunk.c b/board/sc520_spunk/sc520_spunk.c index ed226fd..d119a7d 100644 --- a/board/sc520_spunk/sc520_spunk.c +++ b/board/sc520_spunk/sc520_spunk.c @@ -507,6 +507,7 @@ void show_boot_progress(int val) { int version = read_mmcr_byte(SC520_SYSINFO); + if (val < -32) val = -1; /* let things compatible */ if (version == 0) { /* PIO31-PIO16 Data */ write_mmcr_word(SC520_PIODATA31_16, |