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path: root/drivers/net/wireless/brcm80211/brcmsmac/otp.c
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Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmsmac/otp.c')
-rw-r--r--drivers/net/wireless/brcm80211/brcmsmac/otp.c426
1 files changed, 426 insertions, 0 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmsmac/otp.c b/drivers/net/wireless/brcm80211/brcmsmac/otp.c
new file mode 100644
index 000000000000..edf551561fd8
--- /dev/null
+++ b/drivers/net/wireless/brcm80211/brcmsmac/otp.c
@@ -0,0 +1,426 @@
+/*
+ * 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/io.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+
+#include <brcm_hw_ids.h>
+#include <chipcommon.h>
+#include "aiutils.h"
+#include "otp.h"
+
+#define OTPS_GUP_MASK 0x00000f00
+#define OTPS_GUP_SHIFT 8
+/* h/w subregion is programmed */
+#define OTPS_GUP_HW 0x00000100
+/* s/w subregion is programmed */
+#define OTPS_GUP_SW 0x00000200
+/* chipid/pkgopt subregion is programmed */
+#define OTPS_GUP_CI 0x00000400
+/* fuse subregion is programmed */
+#define OTPS_GUP_FUSE 0x00000800
+
+/* Fields in otpprog in rev >= 21 */
+#define OTPP_COL_MASK 0x000000ff
+#define OTPP_COL_SHIFT 0
+#define OTPP_ROW_MASK 0x0000ff00
+#define OTPP_ROW_SHIFT 8
+#define OTPP_OC_MASK 0x0f000000
+#define OTPP_OC_SHIFT 24
+#define OTPP_READERR 0x10000000
+#define OTPP_VALUE_MASK 0x20000000
+#define OTPP_VALUE_SHIFT 29
+#define OTPP_START_BUSY 0x80000000
+#define OTPP_READ 0x40000000
+
+/* Opcodes for OTPP_OC field */
+#define OTPPOC_READ 0
+#define OTPPOC_BIT_PROG 1
+#define OTPPOC_VERIFY 3
+#define OTPPOC_INIT 4
+#define OTPPOC_SET 5
+#define OTPPOC_RESET 6
+#define OTPPOC_OCST 7
+#define OTPPOC_ROW_LOCK 8
+#define OTPPOC_PRESCN_TEST 9
+
+#define OTPTYPE_IPX(ccrev) ((ccrev) == 21 || (ccrev) >= 23)
+
+#define OTPP_TRIES 10000000 /* # of tries for OTPP */
+
+#define MAXNUMRDES 9 /* Maximum OTP redundancy entries */
+
+/* Fixed size subregions sizes in words */
+#define OTPGU_CI_SZ 2
+
+struct otpinfo;
+
+/* OTP function struct */
+struct otp_fn_s {
+ int (*init)(struct si_pub *sih, struct otpinfo *oi);
+ int (*read_region)(struct otpinfo *oi, int region, u16 *data,
+ uint *wlen);
+};
+
+struct otpinfo {
+ uint ccrev; /* chipc revision */
+ const struct otp_fn_s *fn; /* OTP functions */
+ struct si_pub *sih; /* Saved sb handle */
+
+ /* 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 */
+};
+
+/* 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 u16
+ipxotp_otpr(struct otpinfo *oi, struct chipcregs __iomem *cc, uint wn)
+{
+ return R_REG(&cc->sromotp[wn]);
+}
+
+/*
+ * 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(struct si_pub *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(struct otpinfo *oi, struct chipcregs __iomem *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 int ipxotp_init(struct si_pub *sih, struct otpinfo *oi)
+{
+ uint idx;
+ struct chipcregs __iomem *cc;
+
+ /* Make sure we're running IPX OTP */
+ if (!OTPTYPE_IPX(sih->ccrev))
+ return -EBADE;
+
+ /* Make sure OTP is not disabled */
+ if (ai_is_otp_disabled(sih))
+ return -EBADE;
+
+ /* Check for otp size */
+ switch ((sih->cccaps & CC_CAP_OTPSIZE) >> CC_CAP_OTPSIZE_SHIFT) {
+ case 0:
+ /* Nothing there */
+ return -EBADE;
+ 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 -EBADE;
+ }
+
+ /* Retrieve OTP region info */
+ idx = ai_coreidx(sih);
+ cc = ai_setcoreidx(sih, SI_CC_IDX);
+
+ _ipxotp_init(oi, cc);
+
+ ai_setcoreidx(sih, idx);
+
+ return 0;
+}
+
+static int
+ipxotp_read_region(struct otpinfo *oi, int region, u16 *data, uint *wlen)
+{
+ uint idx;
+ struct chipcregs __iomem *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(oi, cc, base + i);
+
+ ai_setcoreidx(oi->sih, idx);
+ *wlen = sz;
+ return 0;
+}
+
+static const struct otp_fn_s ipxotp_fn = {
+ (int (*)(struct si_pub *, struct otpinfo *)) ipxotp_init,
+ (int (*)(struct otpinfo *, int, u16 *, uint *)) ipxotp_read_region,
+};
+
+static int otp_init(struct si_pub *sih, struct otpinfo *oi)
+{
+
+ int ret;
+
+ memset(oi, 0, sizeof(struct otpinfo));
+
+ oi->ccrev = sih->ccrev;
+
+ if (OTPTYPE_IPX(oi->ccrev))
+ oi->fn = &ipxotp_fn;
+
+ if (oi->fn == NULL)
+ return -EBADE;
+
+ oi->sih = sih;
+
+ ret = (oi->fn->init) (sih, oi);
+
+ return ret;
+}
+
+int
+otp_read_region(struct si_pub *sih, int region, u16 *data, uint *wlen) {
+ struct otpinfo otpinfo;
+ struct otpinfo *oi = &otpinfo;
+ int err = 0;
+
+ if (ai_is_otp_disabled(sih)) {
+ err = -EPERM;
+ goto out;
+ }
+
+ err = otp_init(sih, oi);
+ if (err)
+ goto out;
+
+ err = ((oi)->fn->read_region)(oi, region, data, wlen);
+
+ out:
+ return err;
+}