diff options
Diffstat (limited to 'drivers/staging/brcm80211/brcmsmac/bcmotp.c')
| -rw-r--r-- | drivers/staging/brcm80211/brcmsmac/bcmotp.c | 936 |
1 files changed, 0 insertions, 936 deletions
diff --git a/drivers/staging/brcm80211/brcmsmac/bcmotp.c b/drivers/staging/brcm80211/brcmsmac/bcmotp.c deleted file mode 100644 index d09628b5a88e..000000000000 --- a/drivers/staging/brcm80211/brcmsmac/bcmotp.c +++ /dev/null @@ -1,936 +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/delay.h> -#include <linux/kernel.h> -#include <linux/string.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/crc-ccitt.h> - -#include <bcmdefs.h> -#include <bcmdevs.h> -#include <bcmutils.h> -#include <aiutils.h> -#include <hndsoc.h> -#include <sbchipc.h> -#include <bcmotp.h> - -/* - * There are two different OTP controllers so far: - * 1. new IPX OTP controller: chipc 21, >=23 - * 2. older HND OTP controller: chipc 12, 17, 22 - * - * Define BCMHNDOTP to include support for the HND OTP controller. - * Define BCMIPXOTP to include support for the IPX OTP controller. - * - * NOTE 1: More than one may be defined - * NOTE 2: If none are defined, the default is to include them all. - */ - -#if !defined(BCMHNDOTP) && !defined(BCMIPXOTP) -#define BCMHNDOTP 1 -#define BCMIPXOTP 1 -#endif - -#define OTPTYPE_HND(ccrev) ((ccrev) < 21 || (ccrev) == 22) -#define OTPTYPE_IPX(ccrev) ((ccrev) == 21 || (ccrev) >= 23) - -#define OTPP_TRIES 10000000 /* # of tries for OTPP */ - -#ifdef BCMIPXOTP -#define MAXNUMRDES 9 /* Maximum OTP redundancy entries */ -#endif - -/* OTP common function type */ -typedef int (*otp_status_t) (void *oh); -typedef int (*otp_size_t) (void *oh); -typedef void *(*otp_init_t) (si_t *sih); -typedef u16(*otp_read_bit_t) (void *oh, chipcregs_t *cc, uint off); -typedef int (*otp_read_region_t) (si_t *sih, int region, u16 *data, - uint *wlen); -typedef int (*otp_nvread_t) (void *oh, char *data, uint *len); - -/* OTP function struct */ -typedef struct otp_fn_s { - otp_size_t size; - otp_read_bit_t read_bit; - otp_init_t init; - otp_read_region_t read_region; - otp_nvread_t nvread; - otp_status_t status; -} otp_fn_t; - -typedef struct { - uint ccrev; /* chipc revision */ - otp_fn_t *fn; /* OTP functions */ - si_t *sih; /* Saved sb handle */ - -#ifdef BCMIPXOTP - /* IPX OTP section */ - u16 wsize; /* Size of otp in words */ - u16 rows; /* Geometry */ - u16 cols; /* Geometry */ - u32 status; /* Flag bits (lock/prog/rv). - * (Reflected only when OTP is power cycled) - */ - u16 hwbase; /* hardware subregion offset */ - u16 hwlim; /* hardware subregion boundary */ - u16 swbase; /* software subregion offset */ - u16 swlim; /* software subregion boundary */ - u16 fbase; /* fuse subregion offset */ - u16 flim; /* fuse subregion boundary */ - int otpgu_base; /* offset to General Use Region */ -#endif /* BCMIPXOTP */ - -#ifdef BCMHNDOTP - /* HND OTP section */ - uint size; /* Size of otp in bytes */ - uint hwprot; /* Hardware protection bits */ - uint signvalid; /* Signature valid bits */ - int boundary; /* hw/sw boundary */ -#endif /* BCMHNDOTP */ -} otpinfo_t; - -static otpinfo_t otpinfo; - -/* - * IPX OTP Code - * - * Exported functions: - * ipxotp_status() - * ipxotp_size() - * ipxotp_init() - * ipxotp_read_bit() - * ipxotp_read_region() - * ipxotp_nvread() - * - */ - -#ifdef BCMIPXOTP - -#define HWSW_RGN(rgn) (((rgn) == OTP_HW_RGN) ? "h/w" : "s/w") - -/* OTP layout */ -/* CC revs 21, 24 and 27 OTP General Use Region word offset */ -#define REVA4_OTPGU_BASE 12 - -/* CC revs 23, 25, 26, 28 and above OTP General Use Region word offset */ -#define REVB8_OTPGU_BASE 20 - -/* CC rev 36 OTP General Use Region word offset */ -#define REV36_OTPGU_BASE 12 - -/* Subregion word offsets in General Use region */ -#define OTPGU_HSB_OFF 0 -#define OTPGU_SFB_OFF 1 -#define OTPGU_CI_OFF 2 -#define OTPGU_P_OFF 3 -#define OTPGU_SROM_OFF 4 - -/* Flag bit offsets in General Use region */ -#define OTPGU_HWP_OFF 60 -#define OTPGU_SWP_OFF 61 -#define OTPGU_CIP_OFF 62 -#define OTPGU_FUSEP_OFF 63 -#define OTPGU_CIP_MSK 0x4000 -#define OTPGU_P_MSK 0xf000 -#define OTPGU_P_SHIFT (OTPGU_HWP_OFF % 16) - -/* OTP Size */ -#define OTP_SZ_FU_324 ((roundup(324, 8))/8) /* 324 bits */ -#define OTP_SZ_FU_288 (288/8) /* 288 bits */ -#define OTP_SZ_FU_216 (216/8) /* 216 bits */ -#define OTP_SZ_FU_72 (72/8) /* 72 bits */ -#define OTP_SZ_CHECKSUM (16/8) /* 16 bits */ -#define OTP4315_SWREG_SZ 178 /* 178 bytes */ -#define OTP_SZ_FU_144 (144/8) /* 144 bits */ - -static int ipxotp_status(void *oh) -{ - otpinfo_t *oi = (otpinfo_t *) oh; - return (int)(oi->status); -} - -/* Return size in bytes */ -static int ipxotp_size(void *oh) -{ - otpinfo_t *oi = (otpinfo_t *) oh; - return (int)oi->wsize * 2; -} - -static u16 ipxotp_otpr(void *oh, chipcregs_t *cc, uint wn) -{ - otpinfo_t *oi; - - oi = (otpinfo_t *) oh; - - return R_REG(&cc->sromotp[wn]); -} - -static u16 ipxotp_read_bit(void *oh, chipcregs_t *cc, uint off) -{ - otpinfo_t *oi = (otpinfo_t *) oh; - uint k, row, col; - u32 otpp, st; - - row = off / oi->cols; - col = off % oi->cols; - - otpp = OTPP_START_BUSY | - ((OTPPOC_READ << OTPP_OC_SHIFT) & OTPP_OC_MASK) | - ((row << OTPP_ROW_SHIFT) & OTPP_ROW_MASK) | - ((col << OTPP_COL_SHIFT) & OTPP_COL_MASK); - W_REG(&cc->otpprog, otpp); - - for (k = 0; - ((st = R_REG(&cc->otpprog)) & OTPP_START_BUSY) - && (k < OTPP_TRIES); k++) - ; - if (k >= OTPP_TRIES) { - return 0xffff; - } - if (st & OTPP_READERR) { - return 0xffff; - } - st = (st & OTPP_VALUE_MASK) >> OTPP_VALUE_SHIFT; - - return (int)st; -} - -/* Calculate max HW/SW region byte size by subtracting fuse region and checksum size, - * osizew is oi->wsize (OTP size - GU size) in words - */ -static int ipxotp_max_rgnsz(si_t *sih, int osizew) -{ - int ret = 0; - - switch (sih->chip) { - case BCM43224_CHIP_ID: - case BCM43225_CHIP_ID: - ret = osizew * 2 - OTP_SZ_FU_72 - OTP_SZ_CHECKSUM; - break; - case BCM4313_CHIP_ID: - ret = osizew * 2 - OTP_SZ_FU_72 - OTP_SZ_CHECKSUM; - break; - default: - break; /* Don't know about this chip */ - } - - return ret; -} - -static void _ipxotp_init(otpinfo_t *oi, chipcregs_t *cc) -{ - uint k; - u32 otpp, st; - - /* record word offset of General Use Region for various chipcommon revs */ - if (oi->sih->ccrev == 21 || oi->sih->ccrev == 24 - || oi->sih->ccrev == 27) { - oi->otpgu_base = REVA4_OTPGU_BASE; - } else if (oi->sih->ccrev == 36) { - /* OTP size greater than equal to 2KB (128 words), otpgu_base is similar to rev23 */ - if (oi->wsize >= 128) - oi->otpgu_base = REVB8_OTPGU_BASE; - else - oi->otpgu_base = REV36_OTPGU_BASE; - } else if (oi->sih->ccrev == 23 || oi->sih->ccrev >= 25) { - oi->otpgu_base = REVB8_OTPGU_BASE; - } - - /* First issue an init command so the status is up to date */ - otpp = - OTPP_START_BUSY | ((OTPPOC_INIT << OTPP_OC_SHIFT) & OTPP_OC_MASK); - - W_REG(&cc->otpprog, otpp); - for (k = 0; - ((st = R_REG(&cc->otpprog)) & OTPP_START_BUSY) - && (k < OTPP_TRIES); k++) - ; - if (k >= OTPP_TRIES) { - return; - } - - /* Read OTP lock bits and subregion programmed indication bits */ - oi->status = R_REG(&cc->otpstatus); - - if ((oi->sih->chip == BCM43224_CHIP_ID) - || (oi->sih->chip == BCM43225_CHIP_ID)) { - u32 p_bits; - p_bits = - (ipxotp_otpr(oi, cc, oi->otpgu_base + OTPGU_P_OFF) & - OTPGU_P_MSK) - >> OTPGU_P_SHIFT; - oi->status |= (p_bits << OTPS_GUP_SHIFT); - } - - /* - * h/w region base and fuse region limit are fixed to the top and - * the bottom of the general use region. Everything else can be flexible. - */ - oi->hwbase = oi->otpgu_base + OTPGU_SROM_OFF; - oi->hwlim = oi->wsize; - if (oi->status & OTPS_GUP_HW) { - oi->hwlim = - ipxotp_otpr(oi, cc, oi->otpgu_base + OTPGU_HSB_OFF) / 16; - oi->swbase = oi->hwlim; - } else - oi->swbase = oi->hwbase; - - /* subtract fuse and checksum from beginning */ - oi->swlim = ipxotp_max_rgnsz(oi->sih, oi->wsize) / 2; - - if (oi->status & OTPS_GUP_SW) { - oi->swlim = - ipxotp_otpr(oi, cc, oi->otpgu_base + OTPGU_SFB_OFF) / 16; - oi->fbase = oi->swlim; - } else - oi->fbase = oi->swbase; - - oi->flim = oi->wsize; -} - -static void *ipxotp_init(si_t *sih) -{ - uint idx; - chipcregs_t *cc; - otpinfo_t *oi; - - /* Make sure we're running IPX OTP */ - if (!OTPTYPE_IPX(sih->ccrev)) - return NULL; - - /* Make sure OTP is not disabled */ - if (ai_is_otp_disabled(sih)) - return NULL; - - /* Make sure OTP is powered up */ - if (!ai_is_otp_powered(sih)) - return NULL; - - oi = &otpinfo; - - /* Check for otp size */ - switch ((sih->cccaps & CC_CAP_OTPSIZE) >> CC_CAP_OTPSIZE_SHIFT) { - case 0: - /* Nothing there */ - return NULL; - case 1: /* 32x64 */ - oi->rows = 32; - oi->cols = 64; - oi->wsize = 128; - break; - case 2: /* 64x64 */ - oi->rows = 64; - oi->cols = 64; - oi->wsize = 256; - break; - case 5: /* 96x64 */ - oi->rows = 96; - oi->cols = 64; - oi->wsize = 384; - break; - case 7: /* 16x64 *//* 1024 bits */ - oi->rows = 16; - oi->cols = 64; - oi->wsize = 64; - break; - default: - /* Don't know the geometry */ - return NULL; - } - - /* Retrieve OTP region info */ - idx = ai_coreidx(sih); - cc = ai_setcoreidx(sih, SI_CC_IDX); - - _ipxotp_init(oi, cc); - - ai_setcoreidx(sih, idx); - - return (void *)oi; -} - -static int ipxotp_read_region(void *oh, int region, u16 *data, uint *wlen) -{ - otpinfo_t *oi = (otpinfo_t *) oh; - uint idx; - chipcregs_t *cc; - uint base, i, sz; - - /* Validate region selection */ - switch (region) { - case OTP_HW_RGN: - sz = (uint) oi->hwlim - oi->hwbase; - if (!(oi->status & OTPS_GUP_HW)) { - *wlen = sz; - return -ENODATA; - } - if (*wlen < sz) { - *wlen = sz; - return -EOVERFLOW; - } - base = oi->hwbase; - break; - case OTP_SW_RGN: - sz = ((uint) oi->swlim - oi->swbase); - if (!(oi->status & OTPS_GUP_SW)) { - *wlen = sz; - return -ENODATA; - } - if (*wlen < sz) { - *wlen = sz; - return -EOVERFLOW; - } - base = oi->swbase; - break; - case OTP_CI_RGN: - sz = OTPGU_CI_SZ; - if (!(oi->status & OTPS_GUP_CI)) { - *wlen = sz; - return -ENODATA; - } - if (*wlen < sz) { - *wlen = sz; - return -EOVERFLOW; - } - base = oi->otpgu_base + OTPGU_CI_OFF; - break; - case OTP_FUSE_RGN: - sz = (uint) oi->flim - oi->fbase; - if (!(oi->status & OTPS_GUP_FUSE)) { - *wlen = sz; - return -ENODATA; - } - if (*wlen < sz) { - *wlen = sz; - return -EOVERFLOW; - } - base = oi->fbase; - break; - case OTP_ALL_RGN: - sz = ((uint) oi->flim - oi->hwbase); - if (!(oi->status & (OTPS_GUP_HW | OTPS_GUP_SW))) { - *wlen = sz; - return -ENODATA; - } - if (*wlen < sz) { - *wlen = sz; - return -EOVERFLOW; - } - base = oi->hwbase; - break; - default: - return -EINVAL; - } - - idx = ai_coreidx(oi->sih); - cc = ai_setcoreidx(oi->sih, SI_CC_IDX); - - /* Read the data */ - for (i = 0; i < sz; i++) - data[i] = ipxotp_otpr(oh, cc, base + i); - - ai_setcoreidx(oi->sih, idx); - *wlen = sz; - return 0; -} - -static int ipxotp_nvread(void *oh, char *data, uint *len) -{ - return -ENOTSUPP; -} - -static otp_fn_t ipxotp_fn = { - (otp_size_t) ipxotp_size, - (otp_read_bit_t) ipxotp_read_bit, - - (otp_init_t) ipxotp_init, - (otp_read_region_t) ipxotp_read_region, - (otp_nvread_t) ipxotp_nvread, - - (otp_status_t) ipxotp_status -}; - -#endif /* BCMIPXOTP */ - -/* - * HND OTP Code - * - * Exported functions: - * hndotp_status() - * hndotp_size() - * hndotp_init() - * hndotp_read_bit() - * hndotp_read_region() - * hndotp_nvread() - * - */ - -#ifdef BCMHNDOTP - -/* Fields in otpstatus */ -#define OTPS_PROGFAIL 0x80000000 -#define OTPS_PROTECT 0x00000007 -#define OTPS_HW_PROTECT 0x00000001 -#define OTPS_SW_PROTECT 0x00000002 -#define OTPS_CID_PROTECT 0x00000004 -#define OTPS_RCEV_MSK 0x00003f00 -#define OTPS_RCEV_SHIFT 8 - -/* Fields in the otpcontrol register */ -#define OTPC_RECWAIT 0xff000000 -#define OTPC_PROGWAIT 0x00ffff00 -#define OTPC_PRW_SHIFT 8 -#define OTPC_MAXFAIL 0x00000038 -#define OTPC_VSEL 0x00000006 -#define OTPC_SELVL 0x00000001 - -/* OTP regions (Word offsets from otp size) */ -#define OTP_SWLIM_OFF (-4) -#define OTP_CIDBASE_OFF 0 -#define OTP_CIDLIM_OFF 4 - -/* Predefined OTP words (Word offset from otp size) */ -#define OTP_BOUNDARY_OFF (-4) -#define OTP_HWSIGN_OFF (-3) -#define OTP_SWSIGN_OFF (-2) -#define OTP_CIDSIGN_OFF (-1) -#define OTP_CID_OFF 0 -#define OTP_PKG_OFF 1 -#define OTP_FID_OFF 2 -#define OTP_RSV_OFF 3 -#define OTP_LIM_OFF 4 -#define OTP_RD_OFF 4 /* Redundancy row starts here */ -#define OTP_RC0_OFF 28 /* Redundancy control word 1 */ -#define OTP_RC1_OFF 32 /* Redundancy control word 2 */ -#define OTP_RC_LIM_OFF 36 /* Redundancy control word end */ - -#define OTP_HW_REGION OTPS_HW_PROTECT -#define OTP_SW_REGION OTPS_SW_PROTECT -#define OTP_CID_REGION OTPS_CID_PROTECT - -#if OTP_HW_REGION != OTP_HW_RGN -#error "incompatible OTP_HW_RGN" -#endif -#if OTP_SW_REGION != OTP_SW_RGN -#error "incompatible OTP_SW_RGN" -#endif -#if OTP_CID_REGION != OTP_CI_RGN -#error "incompatible OTP_CI_RGN" -#endif - -/* Redundancy entry definitions */ -#define OTP_RCE_ROW_SZ 6 -#define OTP_RCE_SIGN_MASK 0x7fff -#define OTP_RCE_ROW_MASK 0x3f -#define OTP_RCE_BITS 21 -#define OTP_RCE_SIGN_SZ 15 -#define OTP_RCE_BIT0 1 - -#define OTP_WPR 4 -#define OTP_SIGNATURE 0x578a -#define OTP_MAGIC 0x4e56 - -static int hndotp_status(void *oh) -{ - otpinfo_t *oi = (otpinfo_t *) oh; - return (int)(oi->hwprot | oi->signvalid); -} - -static int hndotp_size(void *oh) -{ - otpinfo_t *oi = (otpinfo_t *) oh; - return (int)(oi->size); -} - -static u16 hndotp_otpr(void *oh, chipcregs_t *cc, uint wn) -{ - volatile u16 *ptr; - - ptr = (volatile u16 *)((volatile char *)cc + CC_SROM_OTP); - return R_REG(&ptr[wn]); -} - -static u16 hndotp_otproff(void *oh, chipcregs_t *cc, int woff) -{ - otpinfo_t *oi = (otpinfo_t *) oh; - volatile u16 *ptr; - - ptr = (volatile u16 *)((volatile char *)cc + CC_SROM_OTP); - - return R_REG(&ptr[(oi->size / 2) + woff]); -} - -static u16 hndotp_read_bit(void *oh, chipcregs_t *cc, uint idx) -{ - uint k, row, col; - u32 otpp, st; - - row = idx / 65; - col = idx % 65; - - otpp = OTPP_START_BUSY | OTPP_READ | - ((row << OTPP_ROW_SHIFT) & OTPP_ROW_MASK) | (col & OTPP_COL_MASK); - - W_REG(&cc->otpprog, otpp); - st = R_REG(&cc->otpprog); - for (k = 0; - ((st & OTPP_START_BUSY) == OTPP_START_BUSY) && (k < OTPP_TRIES); - k++) - st = R_REG(&cc->otpprog); - - if (k >= OTPP_TRIES) { - return 0xffff; - } - if (st & OTPP_READERR) { - return 0xffff; - } - st = (st & OTPP_VALUE_MASK) >> OTPP_VALUE_SHIFT; - return (u16) st; -} - -static void *hndotp_init(si_t *sih) -{ - uint idx; - chipcregs_t *cc; - otpinfo_t *oi; - u32 cap = 0, clkdiv, otpdiv = 0; - void *ret = NULL; - - oi = &otpinfo; - - idx = ai_coreidx(sih); - - /* Check for otp */ - cc = ai_setcoreidx(sih, SI_CC_IDX); - if (cc != NULL) { - cap = R_REG(&cc->capabilities); - if ((cap & CC_CAP_OTPSIZE) == 0) { - /* Nothing there */ - goto out; - } - - if (!((oi->ccrev == 12) || (oi->ccrev == 17) - || (oi->ccrev == 22))) - return NULL; - - /* Read the OTP byte size. chipcommon rev >= 18 has RCE so the size is - * 8 row (64 bytes) smaller - */ - oi->size = - 1 << (((cap & CC_CAP_OTPSIZE) >> CC_CAP_OTPSIZE_SHIFT) - + CC_CAP_OTPSIZE_BASE); - if (oi->ccrev >= 18) - oi->size -= ((OTP_RC0_OFF - OTP_BOUNDARY_OFF) * 2); - - oi->hwprot = (int)(R_REG(&cc->otpstatus) & OTPS_PROTECT); - oi->boundary = -1; - - /* Check the region signature */ - if (hndotp_otproff(oi, cc, OTP_HWSIGN_OFF) == OTP_SIGNATURE) { - oi->signvalid |= OTP_HW_REGION; - oi->boundary = hndotp_otproff(oi, cc, OTP_BOUNDARY_OFF); - } - - if (hndotp_otproff(oi, cc, OTP_SWSIGN_OFF) == OTP_SIGNATURE) - oi->signvalid |= OTP_SW_REGION; - - if (hndotp_otproff(oi, cc, OTP_CIDSIGN_OFF) == OTP_SIGNATURE) - oi->signvalid |= OTP_CID_REGION; - - /* Set OTP clkdiv for stability */ - if (oi->ccrev == 22) - otpdiv = 12; - - if (otpdiv) { - clkdiv = R_REG(&cc->clkdiv); - clkdiv = - (clkdiv & ~CLKD_OTP) | (otpdiv << CLKD_OTP_SHIFT); - W_REG(&cc->clkdiv, clkdiv); - } - udelay(10); - - ret = (void *)oi; - } - - out: /* All done */ - ai_setcoreidx(sih, idx); - - return ret; -} - -static int hndotp_read_region(void *oh, int region, u16 *data, uint *wlen) -{ - otpinfo_t *oi = (otpinfo_t *) oh; - u32 idx, st; - chipcregs_t *cc; - int i; - - - if (region != OTP_HW_REGION) { - /* - * Only support HW region - * (no active chips use HND OTP SW region) - * */ - return -ENOTSUPP; - } - - /* Region empty? */ - st = oi->hwprot | oi->signvalid; - if ((st & region) == 0) - return -ENODATA; - - *wlen = - ((int)*wlen < oi->boundary / 2) ? *wlen : (uint) oi->boundary / 2; - - idx = ai_coreidx(oi->sih); - cc = ai_setcoreidx(oi->sih, SI_CC_IDX); - - for (i = 0; i < (int)*wlen; i++) - data[i] = hndotp_otpr(oh, cc, i); - - ai_setcoreidx(oi->sih, idx); - - return 0; -} - -static int hndotp_nvread(void *oh, char *data, uint *len) -{ - int rc = 0; - otpinfo_t *oi = (otpinfo_t *) oh; - u32 base, bound, lim = 0, st; - int i, chunk, gchunks, tsz = 0; - u32 idx; - chipcregs_t *cc; - uint offset; - u16 *rawotp = NULL; - - /* save the orig core */ - idx = ai_coreidx(oi->sih); - cc = ai_setcoreidx(oi->sih, SI_CC_IDX); - - st = hndotp_status(oh); - if (!(st & (OTP_HW_REGION | OTP_SW_REGION))) { - rc = -1; - goto out; - } - - /* Read the whole otp so we can easily manipulate it */ - lim = hndotp_size(oh); - rawotp = kmalloc(lim, GFP_ATOMIC); - if (rawotp == NULL) { - rc = -2; - goto out; - } - for (i = 0; i < (int)(lim / 2); i++) - rawotp[i] = hndotp_otpr(oh, cc, i); - - if ((st & OTP_HW_REGION) == 0) { - /* This could be a programming failure in the first - * chunk followed by one or more good chunks - */ - for (i = 0; i < (int)(lim / 2); i++) - if (rawotp[i] == OTP_MAGIC) - break; - - if (i < (int)(lim / 2)) { - base = i; - bound = (i * 2) + rawotp[i + 1]; - } else { - rc = -3; - goto out; - } - } else { - bound = rawotp[(lim / 2) + OTP_BOUNDARY_OFF]; - - /* There are two cases: 1) The whole otp is used as nvram - * and 2) There is a hardware header followed by nvram. - */ - if (rawotp[0] == OTP_MAGIC) { - base = 0; - } else - base = bound; - } - - /* Find and copy the data */ - - chunk = 0; - gchunks = 0; - i = base / 2; - offset = 0; - while ((i < (int)(lim / 2)) && (rawotp[i] == OTP_MAGIC)) { - int dsz, rsz = rawotp[i + 1]; - - if (((i * 2) + rsz) >= (int)lim) { - /* Bad length, try to find another chunk anyway */ - rsz = 6; - } - if (crc_ccitt(CRC16_INIT_VALUE, (u8 *) &rawotp[i], rsz) == - CRC16_GOOD_VALUE) { - /* Good crc, copy the vars */ - gchunks++; - dsz = rsz - 6; - tsz += dsz; - if (offset + dsz >= *len) { - goto out; - } - memcpy(&data[offset], &rawotp[i + 2], dsz); - offset += dsz; - /* Remove extra null characters at the end */ - while (offset > 1 && - data[offset - 1] == 0 && data[offset - 2] == 0) - offset--; - i += rsz / 2; - } else { - /* bad length or crc didn't check, try to find the next set */ - if (rawotp[i + (rsz / 2)] == OTP_MAGIC) { - /* Assume length is good */ - i += rsz / 2; - } else { - while (++i < (int)(lim / 2)) - if (rawotp[i] == OTP_MAGIC) - break; - } - } - chunk++; - } - - *len = offset; - - out: - kfree(rawotp); - ai_setcoreidx(oi->sih, idx); - - return rc; -} - -static otp_fn_t hndotp_fn = { - (otp_size_t) hndotp_size, - (otp_read_bit_t) hndotp_read_bit, - - (otp_init_t) hndotp_init, - (otp_read_region_t) hndotp_read_region, - (otp_nvread_t) hndotp_nvread, - - (otp_status_t) hndotp_status -}; - -#endif /* BCMHNDOTP */ - -/* - * Common Code: Compiled for IPX / HND / AUTO - * otp_status() - * otp_size() - * otp_read_bit() - * otp_init() - * otp_read_region() - * otp_nvread() - */ - -int otp_status(void *oh) -{ - otpinfo_t *oi = (otpinfo_t *) oh; - - return oi->fn->status(oh); -} - -int otp_size(void *oh) -{ - otpinfo_t *oi = (otpinfo_t *) oh; - - return oi->fn->size(oh); -} - -u16 otp_read_bit(void *oh, uint offset) -{ - otpinfo_t *oi = (otpinfo_t *) oh; - uint idx = ai_coreidx(oi->sih); - chipcregs_t *cc = ai_setcoreidx(oi->sih, SI_CC_IDX); - u16 readBit = (u16) oi->fn->read_bit(oh, cc, offset); - ai_setcoreidx(oi->sih, idx); - return readBit; -} - -void *otp_init(si_t *sih) -{ - otpinfo_t *oi; - void *ret = NULL; - - oi = &otpinfo; - memset(oi, 0, sizeof(otpinfo_t)); - - oi->ccrev = sih->ccrev; - -#ifdef BCMIPXOTP - if (OTPTYPE_IPX(oi->ccrev)) - oi->fn = &ipxotp_fn; -#endif - -#ifdef BCMHNDOTP - if (OTPTYPE_HND(oi->ccrev)) - oi->fn = &hndotp_fn; -#endif - - if (oi->fn == NULL) { - return NULL; - } - - oi->sih = sih; - - ret = (oi->fn->init) (sih); - - return ret; -} - -int -otp_read_region(si_t *sih, int region, u16 *data, - uint *wlen) { - bool wasup = false; - void *oh; - int err = 0; - - wasup = ai_is_otp_powered(sih); - if (!wasup) - ai_otp_power(sih, true); - - if (!ai_is_otp_powered(sih) || ai_is_otp_disabled(sih)) { - err = -EPERM; - goto out; - } - - oh = otp_init(sih); - if (oh == NULL) { - err = -EBADE; - goto out; - } - - err = (((otpinfo_t *) oh)->fn->read_region) (oh, region, data, wlen); - - out: - if (!wasup) - ai_otp_power(sih, false); - - return err; -} - -int otp_nvread(void *oh, char *data, uint *len) -{ - otpinfo_t *oi = (otpinfo_t *) oh; - - return oi->fn->nvread(oh, data, len); -} |