diff options
Diffstat (limited to 'drivers/staging/brcm80211/brcmsmac/bcmsrom.c')
| -rw-r--r-- | drivers/staging/brcm80211/brcmsmac/bcmsrom.c | 714 |
1 files changed, 0 insertions, 714 deletions
diff --git a/drivers/staging/brcm80211/brcmsmac/bcmsrom.c b/drivers/staging/brcm80211/brcmsmac/bcmsrom.c deleted file mode 100644 index bbfc64204363..000000000000 --- a/drivers/staging/brcm80211/brcmsmac/bcmsrom.c +++ /dev/null @@ -1,714 +0,0 @@ -/* - * Copyright (c) 2010 Broadcom Corporation - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY - * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION - * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN - * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ -#include <linux/kernel.h> -#include <linux/string.h> -#include <linux/etherdevice.h> -#include <bcmdefs.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <stdarg.h> -#include <bcmutils.h> -#include <hndsoc.h> -#include <sbchipc.h> -#include <bcmdevs.h> -#include <pcicfg.h> -#include <aiutils.h> -#include <bcmsrom.h> -#include <bcmsrom_tbl.h> - -#include <bcmnvram.h> -#include <bcmotp.h> - -#define SROM_OFFSET(sih) ((sih->ccrev > 31) ? \ - (((sih->cccaps & CC_CAP_SROM) == 0) ? NULL : \ - ((u8 *)curmap + PCI_16KB0_CCREGS_OFFSET + CC_SROM_OTP)) : \ - ((u8 *)curmap + PCI_BAR0_SPROM_OFFSET)) - -#if defined(BCMDBG) -#define WRITE_ENABLE_DELAY 500 /* 500 ms after write enable/disable toggle */ -#define WRITE_WORD_DELAY 20 /* 20 ms between each word write */ -#endif - -typedef struct varbuf { - char *base; /* pointer to buffer base */ - char *buf; /* pointer to current position */ - unsigned int size; /* current (residual) size in bytes */ -} varbuf_t; -extern char *_vars; -extern uint _varsz; - -static int initvars_srom_si(si_t *sih, void *curmap, char **vars, uint *count); -static void _initvars_srom_pci(u8 sromrev, u16 *srom, uint off, varbuf_t *b); -static int initvars_srom_pci(si_t *sih, void *curmap, char **vars, uint *count); -static int initvars_flash_si(si_t *sih, char **vars, uint *count); -static int sprom_read_pci(si_t *sih, u16 *sprom, - uint wordoff, u16 *buf, uint nwords, bool check_crc); -#if defined(BCMNVRAMR) -static int otp_read_pci(si_t *sih, u16 *buf, uint bufsz); -#endif -static u16 srom_cc_cmd(si_t *sih, void *ccregs, u32 cmd, - uint wordoff, u16 data); - -static int initvars_table(char *start, char *end, - char **vars, uint *count); -static int initvars_flash(si_t *sih, char **vp, - uint len); - -/* Initialization of varbuf structure */ -static void varbuf_init(varbuf_t *b, char *buf, uint size) -{ - b->size = size; - b->base = b->buf = buf; -} - -/* append a null terminated var=value string */ -static int varbuf_append(varbuf_t *b, const char *fmt, ...) -{ - va_list ap; - int r; - size_t len; - char *s; - - if (b->size < 2) - return 0; - - va_start(ap, fmt); - r = vsnprintf(b->buf, b->size, fmt, ap); - va_end(ap); - - /* C99 snprintf behavior returns r >= size on overflow, - * others return -1 on overflow. - * All return -1 on format error. - * We need to leave room for 2 null terminations, one for the current var - * string, and one for final null of the var table. So check that the - * strlen written, r, leaves room for 2 chars. - */ - if ((r == -1) || (r > (int)(b->size - 2))) { - b->size = 0; - return 0; - } - - /* Remove any earlier occurrence of the same variable */ - s = strchr(b->buf, '='); - if (s != NULL) { - len = (size_t) (s - b->buf); - for (s = b->base; s < b->buf;) { - if ((memcmp(s, b->buf, len) == 0) && s[len] == '=') { - len = strlen(s) + 1; - memmove(s, (s + len), - ((b->buf + r + 1) - (s + len))); - b->buf -= len; - b->size += (unsigned int)len; - break; - } - - while (*s++) - ; - } - } - - /* skip over this string's null termination */ - r++; - b->size -= r; - b->buf += r; - - return r; -} - -/* - * Initialize local vars from the right source for this platform. - * Return 0 on success, nonzero on error. - */ -int srom_var_init(si_t *sih, uint bustype, void *curmap, - char **vars, uint *count) -{ - uint len; - - len = 0; - - if (vars == NULL || count == NULL) - return 0; - - *vars = NULL; - *count = 0; - - switch (bustype) { - case SI_BUS: - case JTAG_BUS: - return initvars_srom_si(sih, curmap, vars, count); - - case PCI_BUS: - if (curmap == NULL) - return -1; - - return initvars_srom_pci(sih, curmap, vars, count); - - default: - break; - } - return -1; -} - -/* In chips with chipcommon rev 32 and later, the srom is in chipcommon, - * not in the bus cores. - */ -static u16 -srom_cc_cmd(si_t *sih, void *ccregs, u32 cmd, - uint wordoff, u16 data) -{ - chipcregs_t *cc = (chipcregs_t *) ccregs; - uint wait_cnt = 1000; - - if ((cmd == SRC_OP_READ) || (cmd == SRC_OP_WRITE)) { - W_REG(&cc->sromaddress, wordoff * 2); - if (cmd == SRC_OP_WRITE) - W_REG(&cc->sromdata, data); - } - - W_REG(&cc->sromcontrol, SRC_START | cmd); - - while (wait_cnt--) { - if ((R_REG(&cc->sromcontrol) & SRC_BUSY) == 0) - break; - } - - if (!wait_cnt) { - return 0xffff; - } - if (cmd == SRC_OP_READ) - return (u16) R_REG(&cc->sromdata); - else - return 0xffff; -} - -static inline void ltoh16_buf(u16 *buf, unsigned int size) -{ - for (size /= 2; size; size--) - *(buf + size) = le16_to_cpu(*(buf + size)); -} - -static inline void htol16_buf(u16 *buf, unsigned int size) -{ - for (size /= 2; size; size--) - *(buf + size) = cpu_to_le16(*(buf + size)); -} - -/* - * Read in and validate sprom. - * Return 0 on success, nonzero on error. - */ -static int -sprom_read_pci(si_t *sih, u16 *sprom, uint wordoff, - u16 *buf, uint nwords, bool check_crc) -{ - int err = 0; - uint i; - void *ccregs = NULL; - - /* read the sprom */ - for (i = 0; i < nwords; i++) { - - if (sih->ccrev > 31 && ISSIM_ENAB(sih)) { - /* use indirect since direct is too slow on QT */ - if ((sih->cccaps & CC_CAP_SROM) == 0) - return 1; - - ccregs = (void *)((u8 *) sprom - CC_SROM_OTP); - buf[i] = - srom_cc_cmd(sih, ccregs, SRC_OP_READ, - wordoff + i, 0); - - } else { - if (ISSIM_ENAB(sih)) - buf[i] = R_REG(&sprom[wordoff + i]); - - buf[i] = R_REG(&sprom[wordoff + i]); - } - - } - - /* bypass crc checking for simulation to allow srom hack */ - if (ISSIM_ENAB(sih)) - return err; - - if (check_crc) { - - if (buf[0] == 0xffff) { - /* The hardware thinks that an srom that starts with 0xffff - * is blank, regardless of the rest of the content, so declare - * it bad. - */ - return 1; - } - - /* fixup the endianness so crc8 will pass */ - htol16_buf(buf, nwords * 2); - if (bcm_crc8((u8 *) buf, nwords * 2, CRC8_INIT_VALUE) != - CRC8_GOOD_VALUE) { - /* DBG only pci always read srom4 first, then srom8/9 */ - err = 1; - } - /* now correct the endianness of the byte array */ - ltoh16_buf(buf, nwords * 2); - } - return err; -} - -#if defined(BCMNVRAMR) -static int otp_read_pci(si_t *sih, u16 *buf, uint bufsz) -{ - u8 *otp; - uint sz = OTP_SZ_MAX / 2; /* size in words */ - int err = 0; - - otp = kzalloc(OTP_SZ_MAX, GFP_ATOMIC); - if (otp == NULL) { - return -EBADE; - } - - err = otp_read_region(sih, OTP_HW_RGN, (u16 *) otp, &sz); - - memcpy(buf, otp, bufsz); - - kfree(otp); - - /* Check CRC */ - if (buf[0] == 0xffff) { - /* The hardware thinks that an srom that starts with 0xffff - * is blank, regardless of the rest of the content, so declare - * it bad. - */ - return 1; - } - - /* fixup the endianness so crc8 will pass */ - htol16_buf(buf, bufsz); - if (bcm_crc8((u8 *) buf, SROM4_WORDS * 2, CRC8_INIT_VALUE) != - CRC8_GOOD_VALUE) { - err = 1; - } - /* now correct the endianness of the byte array */ - ltoh16_buf(buf, bufsz); - - return err; -} -#endif /* defined(BCMNVRAMR) */ -/* -* Create variable table from memory. -* Return 0 on success, nonzero on error. -*/ -static int initvars_table(char *start, char *end, - char **vars, uint *count) -{ - int c = (int)(end - start); - - /* do it only when there is more than just the null string */ - if (c > 1) { - char *vp = kmalloc(c, GFP_ATOMIC); - if (!vp) - return -ENOMEM; - memcpy(vp, start, c); - *vars = vp; - *count = c; - } else { - *vars = NULL; - *count = 0; - } - - return 0; -} - -/* - * Find variables with <devpath> from flash. 'base' points to the beginning - * of the table upon enter and to the end of the table upon exit when success. - * Return 0 on success, nonzero on error. - */ -static int initvars_flash(si_t *sih, char **base, uint len) -{ - char *vp = *base; - char *flash; - int err; - char *s; - uint l, dl, copy_len; - char devpath[SI_DEVPATH_BUFSZ]; - - /* allocate memory and read in flash */ - flash = kmalloc(NVRAM_SPACE, GFP_ATOMIC); - if (!flash) - return -ENOMEM; - err = nvram_getall(flash, NVRAM_SPACE); - if (err) - goto exit; - - ai_devpath(sih, devpath, sizeof(devpath)); - - /* grab vars with the <devpath> prefix in name */ - dl = strlen(devpath); - for (s = flash; s && *s; s += l + 1) { - l = strlen(s); - - /* skip non-matching variable */ - if (strncmp(s, devpath, dl)) - continue; - - /* is there enough room to copy? */ - copy_len = l - dl + 1; - if (len < copy_len) { - err = -EOVERFLOW; - goto exit; - } - - /* no prefix, just the name=value */ - strncpy(vp, &s[dl], copy_len); - vp += copy_len; - len -= copy_len; - } - - /* add null string as terminator */ - if (len < 1) { - err = -EOVERFLOW; - goto exit; - } - *vp++ = '\0'; - - *base = vp; - - exit: kfree(flash); - return err; -} - -/* - * Initialize nonvolatile variable table from flash. - * Return 0 on success, nonzero on error. - */ -static int initvars_flash_si(si_t *sih, char **vars, uint *count) -{ - char *vp, *base; - int err; - - base = vp = kmalloc(MAXSZ_NVRAM_VARS, GFP_ATOMIC); - if (!vp) - return -ENOMEM; - - err = initvars_flash(sih, &vp, MAXSZ_NVRAM_VARS); - if (err == 0) - err = initvars_table(base, vp, vars, count); - - kfree(base); - - return err; -} - -/* Parse SROM and create name=value pairs. 'srom' points to - * the SROM word array. 'off' specifies the offset of the - * first word 'srom' points to, which should be either 0 or - * SROM3_SWRG_OFF (full SROM or software region). - */ - -static uint mask_shift(u16 mask) -{ - uint i; - for (i = 0; i < (sizeof(mask) << 3); i++) { - if (mask & (1 << i)) - return i; - } - return 0; -} - -static uint mask_width(u16 mask) -{ - int i; - for (i = (sizeof(mask) << 3) - 1; i >= 0; i--) { - if (mask & (1 << i)) - return (uint) (i - mask_shift(mask) + 1); - } - return 0; -} - -static void _initvars_srom_pci(u8 sromrev, u16 *srom, uint off, varbuf_t *b) -{ - u16 w; - u32 val; - const sromvar_t *srv; - uint width; - uint flags; - u32 sr = (1 << sromrev); - - varbuf_append(b, "sromrev=%d", sromrev); - - for (srv = pci_sromvars; srv->name != NULL; srv++) { - const char *name; - - if ((srv->revmask & sr) == 0) - continue; - - if (srv->off < off) - continue; - - flags = srv->flags; - name = srv->name; - - /* This entry is for mfgc only. Don't generate param for it, */ - if (flags & SRFL_NOVAR) - continue; - - if (flags & SRFL_ETHADDR) { - u8 ea[ETH_ALEN]; - - ea[0] = (srom[srv->off - off] >> 8) & 0xff; - ea[1] = srom[srv->off - off] & 0xff; - ea[2] = (srom[srv->off + 1 - off] >> 8) & 0xff; - ea[3] = srom[srv->off + 1 - off] & 0xff; - ea[4] = (srom[srv->off + 2 - off] >> 8) & 0xff; - ea[5] = srom[srv->off + 2 - off] & 0xff; - - varbuf_append(b, "%s=%pM", name, ea); - } else { - w = srom[srv->off - off]; - val = (w & srv->mask) >> mask_shift(srv->mask); - width = mask_width(srv->mask); - - while (srv->flags & SRFL_MORE) { - srv++; - if (srv->off == 0 || srv->off < off) - continue; - - w = srom[srv->off - off]; - val += - ((w & srv->mask) >> mask_shift(srv-> - mask)) << - width; - width += mask_width(srv->mask); - } - - if ((flags & SRFL_NOFFS) - && ((int)val == (1 << width) - 1)) - continue; - - if (flags & SRFL_CCODE) { - if (val == 0) - varbuf_append(b, "ccode="); - else - varbuf_append(b, "ccode=%c%c", - (val >> 8), (val & 0xff)); - } - /* LED Powersave duty cycle has to be scaled: - *(oncount >> 24) (offcount >> 8) - */ - else if (flags & SRFL_LEDDC) { - u32 w32 = (((val >> 8) & 0xff) << 24) | /* oncount */ - (((val & 0xff)) << 8); /* offcount */ - varbuf_append(b, "leddc=%d", w32); - } else if (flags & SRFL_PRHEX) - varbuf_append(b, "%s=0x%x", name, val); - else if ((flags & SRFL_PRSIGN) - && (val & (1 << (width - 1)))) - varbuf_append(b, "%s=%d", name, - (int)(val | (~0 << width))); - else - varbuf_append(b, "%s=%u", name, val); - } - } - - if (sromrev >= 4) { - /* Do per-path variables */ - uint p, pb, psz; - - if (sromrev >= 8) { - pb = SROM8_PATH0; - psz = SROM8_PATH1 - SROM8_PATH0; - } else { - pb = SROM4_PATH0; - psz = SROM4_PATH1 - SROM4_PATH0; - } - - for (p = 0; p < MAX_PATH_SROM; p++) { - for (srv = perpath_pci_sromvars; srv->name != NULL; - srv++) { - if ((srv->revmask & sr) == 0) - continue; - - if (pb + srv->off < off) - continue; - - /* This entry is for mfgc only. Don't generate param for it, */ - if (srv->flags & SRFL_NOVAR) - continue; - - w = srom[pb + srv->off - off]; - val = (w & srv->mask) >> mask_shift(srv->mask); - width = mask_width(srv->mask); - - /* Cheating: no per-path var is more than 1 word */ - - if ((srv->flags & SRFL_NOFFS) - && ((int)val == (1 << width) - 1)) - continue; - - if (srv->flags & SRFL_PRHEX) - varbuf_append(b, "%s%d=0x%x", srv->name, - p, val); - else - varbuf_append(b, "%s%d=%d", srv->name, - p, val); - } - pb += psz; - } - } -} - -/* - * Initialize nonvolatile variable table from sprom. - * Return 0 on success, nonzero on error. - */ -static int initvars_srom_pci(si_t *sih, void *curmap, char **vars, uint *count) -{ - u16 *srom, *sromwindow; - u8 sromrev = 0; - u32 sr; - varbuf_t b; - char *vp, *base = NULL; - bool flash = false; - int err = 0; - - /* - * Apply CRC over SROM content regardless SROM is present or not, - * and use variable <devpath>sromrev's existence in flash to decide - * if we should return an error when CRC fails or read SROM variables - * from flash. - */ - srom = kmalloc(SROM_MAX, GFP_ATOMIC); - if (!srom) - return -2; - - sromwindow = (u16 *) SROM_OFFSET(sih); - if (ai_is_sprom_available(sih)) { - err = - sprom_read_pci(sih, sromwindow, 0, srom, SROM_WORDS, - true); - - if ((srom[SROM4_SIGN] == SROM4_SIGNATURE) || - (((sih->buscoretype == PCIE_CORE_ID) - && (sih->buscorerev >= 6)) - || ((sih->buscoretype == PCI_CORE_ID) - && (sih->buscorerev >= 0xe)))) { - /* sromrev >= 4, read more */ - err = - sprom_read_pci(sih, sromwindow, 0, srom, - SROM4_WORDS, true); - sromrev = srom[SROM4_CRCREV] & 0xff; - } else if (err == 0) { - /* srom is good and is rev < 4 */ - /* top word of sprom contains version and crc8 */ - sromrev = srom[SROM_CRCREV] & 0xff; - /* bcm4401 sroms misprogrammed */ - if (sromrev == 0x10) - sromrev = 1; - } - } -#if defined(BCMNVRAMR) - /* Use OTP if SPROM not available */ - else { - err = otp_read_pci(sih, srom, SROM_MAX); - if (err == 0) - /* OTP only contain SROM rev8/rev9 for now */ - sromrev = srom[SROM4_CRCREV] & 0xff; - else - err = 1; - } -#else - else - err = 1; -#endif - - /* - * We want internal/wltest driver to come up with default - * sromvars so we can program a blank SPROM/OTP. - */ - if (err) { - char *value; - u32 val; - val = 0; - - value = ai_getdevpathvar(sih, "sromrev"); - if (value) { - sromrev = (u8) simple_strtoul(value, NULL, 0); - flash = true; - goto varscont; - } - - value = ai_getnvramflvar(sih, "sromrev"); - if (value) { - err = 0; - goto errout; - } - - { - err = -1; - goto errout; - } - } - - varscont: - /* Bitmask for the sromrev */ - sr = 1 << sromrev; - - /* srom version check: Current valid versions: 1, 2, 3, 4, 5, 8, 9 */ - if ((sr & 0x33e) == 0) { - err = -2; - goto errout; - } - - base = vp = kmalloc(MAXSZ_NVRAM_VARS, GFP_ATOMIC); - if (!vp) { - err = -2; - goto errout; - } - - /* read variables from flash */ - if (flash) { - err = initvars_flash(sih, &vp, MAXSZ_NVRAM_VARS); - if (err) - goto errout; - goto varsdone; - } - - varbuf_init(&b, base, MAXSZ_NVRAM_VARS); - - /* parse SROM into name=value pairs. */ - _initvars_srom_pci(sromrev, srom, 0, &b); - - /* final nullbyte terminator */ - vp = b.buf; - *vp++ = '\0'; - - varsdone: - err = initvars_table(base, vp, vars, count); - - errout: - if (base) - kfree(base); - - kfree(srom); - return err; -} - - -static int initvars_srom_si(si_t *sih, void *curmap, char **vars, uint *varsz) -{ - /* Search flash nvram section for srom variables */ - return initvars_flash_si(sih, vars, varsz); -} |