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linux/drivers/bcma/sprom.c

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bcma: read SPROM and extract MAC from it In case of BCMA cards SPROM is located in the ChipCommon core, it is not mapped as separated host window. So far we have met only SPROMs rev 8. SPROM layout seems to be the same as for SSB buses, so we decided to share SPROM struct and some defines. For now we extract MAC address only, this can be improved of course. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-06-02 00:08:51 +00:00
/*
* Broadcom specific AMBA
* SPROM reading
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
#include "bcma_private.h"
#include <linux/bcma/bcma.h>
#include <linux/bcma/bcma_regs.h>
#include <linux/pci.h>
#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#define SPOFF(offset) ((offset) / sizeof(u16))
/**************************************************
* R/W ops.
**************************************************/
bcma: handle alternative SPROM location Some cards do not use additional 0x30 offset for SPROM location. We do not know the real condition for it yet, make it BCM4331 specific for now. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-17 09:00:59 +00:00
static void bcma_sprom_read(struct bcma_bus *bus, u16 offset, u16 *sprom)
bcma: read SPROM and extract MAC from it In case of BCMA cards SPROM is located in the ChipCommon core, it is not mapped as separated host window. So far we have met only SPROMs rev 8. SPROM layout seems to be the same as for SSB buses, so we decided to share SPROM struct and some defines. For now we extract MAC address only, this can be improved of course. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-06-02 00:08:51 +00:00
{
int i;
for (i = 0; i < SSB_SPROMSIZE_WORDS_R4; i++)
sprom[i] = bcma_read16(bus->drv_cc.core,
bcma: handle alternative SPROM location Some cards do not use additional 0x30 offset for SPROM location. We do not know the real condition for it yet, make it BCM4331 specific for now. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-17 09:00:59 +00:00
offset + (i * 2));
bcma: read SPROM and extract MAC from it In case of BCMA cards SPROM is located in the ChipCommon core, it is not mapped as separated host window. So far we have met only SPROMs rev 8. SPROM layout seems to be the same as for SSB buses, so we decided to share SPROM struct and some defines. For now we extract MAC address only, this can be improved of course. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-06-02 00:08:51 +00:00
}
/**************************************************
* Validation.
**************************************************/
static inline u8 bcma_crc8(u8 crc, u8 data)
{
/* Polynomial: x^8 + x^7 + x^6 + x^4 + x^2 + 1 */
static const u8 t[] = {
0x00, 0xF7, 0xB9, 0x4E, 0x25, 0xD2, 0x9C, 0x6B,
0x4A, 0xBD, 0xF3, 0x04, 0x6F, 0x98, 0xD6, 0x21,
0x94, 0x63, 0x2D, 0xDA, 0xB1, 0x46, 0x08, 0xFF,
0xDE, 0x29, 0x67, 0x90, 0xFB, 0x0C, 0x42, 0xB5,
0x7F, 0x88, 0xC6, 0x31, 0x5A, 0xAD, 0xE3, 0x14,
0x35, 0xC2, 0x8C, 0x7B, 0x10, 0xE7, 0xA9, 0x5E,
0xEB, 0x1C, 0x52, 0xA5, 0xCE, 0x39, 0x77, 0x80,
0xA1, 0x56, 0x18, 0xEF, 0x84, 0x73, 0x3D, 0xCA,
0xFE, 0x09, 0x47, 0xB0, 0xDB, 0x2C, 0x62, 0x95,
0xB4, 0x43, 0x0D, 0xFA, 0x91, 0x66, 0x28, 0xDF,
0x6A, 0x9D, 0xD3, 0x24, 0x4F, 0xB8, 0xF6, 0x01,
0x20, 0xD7, 0x99, 0x6E, 0x05, 0xF2, 0xBC, 0x4B,
0x81, 0x76, 0x38, 0xCF, 0xA4, 0x53, 0x1D, 0xEA,
0xCB, 0x3C, 0x72, 0x85, 0xEE, 0x19, 0x57, 0xA0,
0x15, 0xE2, 0xAC, 0x5B, 0x30, 0xC7, 0x89, 0x7E,
0x5F, 0xA8, 0xE6, 0x11, 0x7A, 0x8D, 0xC3, 0x34,
0xAB, 0x5C, 0x12, 0xE5, 0x8E, 0x79, 0x37, 0xC0,
0xE1, 0x16, 0x58, 0xAF, 0xC4, 0x33, 0x7D, 0x8A,
0x3F, 0xC8, 0x86, 0x71, 0x1A, 0xED, 0xA3, 0x54,
0x75, 0x82, 0xCC, 0x3B, 0x50, 0xA7, 0xE9, 0x1E,
0xD4, 0x23, 0x6D, 0x9A, 0xF1, 0x06, 0x48, 0xBF,
0x9E, 0x69, 0x27, 0xD0, 0xBB, 0x4C, 0x02, 0xF5,
0x40, 0xB7, 0xF9, 0x0E, 0x65, 0x92, 0xDC, 0x2B,
0x0A, 0xFD, 0xB3, 0x44, 0x2F, 0xD8, 0x96, 0x61,
0x55, 0xA2, 0xEC, 0x1B, 0x70, 0x87, 0xC9, 0x3E,
0x1F, 0xE8, 0xA6, 0x51, 0x3A, 0xCD, 0x83, 0x74,
0xC1, 0x36, 0x78, 0x8F, 0xE4, 0x13, 0x5D, 0xAA,
0x8B, 0x7C, 0x32, 0xC5, 0xAE, 0x59, 0x17, 0xE0,
0x2A, 0xDD, 0x93, 0x64, 0x0F, 0xF8, 0xB6, 0x41,
0x60, 0x97, 0xD9, 0x2E, 0x45, 0xB2, 0xFC, 0x0B,
0xBE, 0x49, 0x07, 0xF0, 0x9B, 0x6C, 0x22, 0xD5,
0xF4, 0x03, 0x4D, 0xBA, 0xD1, 0x26, 0x68, 0x9F,
};
return t[crc ^ data];
}
static u8 bcma_sprom_crc(const u16 *sprom)
{
int word;
u8 crc = 0xFF;
for (word = 0; word < SSB_SPROMSIZE_WORDS_R4 - 1; word++) {
crc = bcma_crc8(crc, sprom[word] & 0x00FF);
crc = bcma_crc8(crc, (sprom[word] & 0xFF00) >> 8);
}
crc = bcma_crc8(crc, sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & 0x00FF);
crc ^= 0xFF;
return crc;
}
static int bcma_sprom_check_crc(const u16 *sprom)
{
u8 crc;
u8 expected_crc;
u16 tmp;
crc = bcma_sprom_crc(sprom);
tmp = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & SSB_SPROM_REVISION_CRC;
expected_crc = tmp >> SSB_SPROM_REVISION_CRC_SHIFT;
if (crc != expected_crc)
return -EPROTO;
return 0;
}
static int bcma_sprom_valid(const u16 *sprom)
{
u16 revision;
int err;
err = bcma_sprom_check_crc(sprom);
if (err)
return err;
revision = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & SSB_SPROM_REVISION_REV;
bcma: extract SPROM rev 9 the same way as rev 8 SPROM rev 9 was discovered on 14e4:4331, it seems to have very similar layout to rev 8 one. Use the same extracting function until we find some differences. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-14 19:49:21 +00:00
if (revision != 8 && revision != 9) {
bcma: read SPROM and extract MAC from it In case of BCMA cards SPROM is located in the ChipCommon core, it is not mapped as separated host window. So far we have met only SPROMs rev 8. SPROM layout seems to be the same as for SSB buses, so we decided to share SPROM struct and some defines. For now we extract MAC address only, this can be improved of course. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-06-02 00:08:51 +00:00
pr_err("Unsupported SPROM revision: %d\n", revision);
return -ENOENT;
}
return 0;
}
/**************************************************
* SPROM extraction.
**************************************************/
static void bcma_sprom_extract_r8(struct bcma_bus *bus, const u16 *sprom)
{
u16 v;
int i;
bcma: extract revision and TX power IDs from SPROM Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-12-12 20:33:12 +00:00
bus->sprom.revision = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] &
SSB_SPROM_REVISION_REV;
bcma: read SPROM and extract MAC from it In case of BCMA cards SPROM is located in the ChipCommon core, it is not mapped as separated host window. So far we have met only SPROMs rev 8. SPROM layout seems to be the same as for SSB buses, so we decided to share SPROM struct and some defines. For now we extract MAC address only, this can be improved of course. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-06-02 00:08:51 +00:00
for (i = 0; i < 3; i++) {
v = sprom[SPOFF(SSB_SPROM8_IL0MAC) + i];
*(((__be16 *)bus->sprom.il0mac) + i) = cpu_to_be16(v);
}
bcma: extract some basic info about board from SPROM Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-08-28 16:47:23 +00:00
bus->sprom.board_rev = sprom[SPOFF(SSB_SPROM8_BOARDREV)];
bcma: extract revision and TX power IDs from SPROM Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-12-12 20:33:12 +00:00
bus->sprom.txpid2g[0] = (sprom[SPOFF(SSB_SPROM4_TXPID2G01)] &
SSB_SPROM4_TXPID2G0) >> SSB_SPROM4_TXPID2G0_SHIFT;
bus->sprom.txpid2g[1] = (sprom[SPOFF(SSB_SPROM4_TXPID2G01)] &
SSB_SPROM4_TXPID2G1) >> SSB_SPROM4_TXPID2G1_SHIFT;
bus->sprom.txpid2g[2] = (sprom[SPOFF(SSB_SPROM4_TXPID2G23)] &
SSB_SPROM4_TXPID2G2) >> SSB_SPROM4_TXPID2G2_SHIFT;
bus->sprom.txpid2g[3] = (sprom[SPOFF(SSB_SPROM4_TXPID2G23)] &
SSB_SPROM4_TXPID2G3) >> SSB_SPROM4_TXPID2G3_SHIFT;
bus->sprom.txpid5gl[0] = (sprom[SPOFF(SSB_SPROM4_TXPID5GL01)] &
SSB_SPROM4_TXPID5GL0) >> SSB_SPROM4_TXPID5GL0_SHIFT;
bus->sprom.txpid5gl[1] = (sprom[SPOFF(SSB_SPROM4_TXPID5GL01)] &
SSB_SPROM4_TXPID5GL1) >> SSB_SPROM4_TXPID5GL1_SHIFT;
bus->sprom.txpid5gl[2] = (sprom[SPOFF(SSB_SPROM4_TXPID5GL23)] &
SSB_SPROM4_TXPID5GL2) >> SSB_SPROM4_TXPID5GL2_SHIFT;
bus->sprom.txpid5gl[3] = (sprom[SPOFF(SSB_SPROM4_TXPID5GL23)] &
SSB_SPROM4_TXPID5GL3) >> SSB_SPROM4_TXPID5GL3_SHIFT;
bus->sprom.txpid5g[0] = (sprom[SPOFF(SSB_SPROM4_TXPID5G01)] &
SSB_SPROM4_TXPID5G0) >> SSB_SPROM4_TXPID5G0_SHIFT;
bus->sprom.txpid5g[1] = (sprom[SPOFF(SSB_SPROM4_TXPID5G01)] &
SSB_SPROM4_TXPID5G1) >> SSB_SPROM4_TXPID5G1_SHIFT;
bus->sprom.txpid5g[2] = (sprom[SPOFF(SSB_SPROM4_TXPID5G23)] &
SSB_SPROM4_TXPID5G2) >> SSB_SPROM4_TXPID5G2_SHIFT;
bus->sprom.txpid5g[3] = (sprom[SPOFF(SSB_SPROM4_TXPID5G23)] &
SSB_SPROM4_TXPID5G3) >> SSB_SPROM4_TXPID5G3_SHIFT;
bus->sprom.txpid5gh[0] = (sprom[SPOFF(SSB_SPROM4_TXPID5GH01)] &
SSB_SPROM4_TXPID5GH0) >> SSB_SPROM4_TXPID5GH0_SHIFT;
bus->sprom.txpid5gh[1] = (sprom[SPOFF(SSB_SPROM4_TXPID5GH01)] &
SSB_SPROM4_TXPID5GH1) >> SSB_SPROM4_TXPID5GH1_SHIFT;
bus->sprom.txpid5gh[2] = (sprom[SPOFF(SSB_SPROM4_TXPID5GH23)] &
SSB_SPROM4_TXPID5GH2) >> SSB_SPROM4_TXPID5GH2_SHIFT;
bus->sprom.txpid5gh[3] = (sprom[SPOFF(SSB_SPROM4_TXPID5GH23)] &
SSB_SPROM4_TXPID5GH3) >> SSB_SPROM4_TXPID5GH3_SHIFT;
bcma: extract some basic info about board from SPROM Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-08-28 16:47:23 +00:00
bus->sprom.boardflags_lo = sprom[SPOFF(SSB_SPROM8_BFLLO)];
bus->sprom.boardflags_hi = sprom[SPOFF(SSB_SPROM8_BFLHI)];
bus->sprom.boardflags2_lo = sprom[SPOFF(SSB_SPROM8_BFL2LO)];
bus->sprom.boardflags2_hi = sprom[SPOFF(SSB_SPROM8_BFL2HI)];
bus->sprom.country_code = sprom[SPOFF(SSB_SPROM8_CCODE)];
bcma: extract FEM info from SPROM Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-12-08 17:02:22 +00:00
bus->sprom.fem.ghz2.tssipos = (sprom[SPOFF(SSB_SPROM8_FEM2G)] &
SSB_SROM8_FEM_TSSIPOS) >> SSB_SROM8_FEM_TSSIPOS_SHIFT;
bus->sprom.fem.ghz2.extpa_gain = (sprom[SPOFF(SSB_SPROM8_FEM2G)] &
SSB_SROM8_FEM_EXTPA_GAIN) >> SSB_SROM8_FEM_EXTPA_GAIN_SHIFT;
bus->sprom.fem.ghz2.pdet_range = (sprom[SPOFF(SSB_SPROM8_FEM2G)] &
SSB_SROM8_FEM_PDET_RANGE) >> SSB_SROM8_FEM_PDET_RANGE_SHIFT;
bus->sprom.fem.ghz2.tr_iso = (sprom[SPOFF(SSB_SPROM8_FEM2G)] &
SSB_SROM8_FEM_TR_ISO) >> SSB_SROM8_FEM_TR_ISO_SHIFT;
bus->sprom.fem.ghz2.antswlut = (sprom[SPOFF(SSB_SPROM8_FEM2G)] &
SSB_SROM8_FEM_ANTSWLUT) >> SSB_SROM8_FEM_ANTSWLUT_SHIFT;
bus->sprom.fem.ghz5.tssipos = (sprom[SPOFF(SSB_SPROM8_FEM5G)] &
SSB_SROM8_FEM_TSSIPOS) >> SSB_SROM8_FEM_TSSIPOS_SHIFT;
bus->sprom.fem.ghz5.extpa_gain = (sprom[SPOFF(SSB_SPROM8_FEM5G)] &
SSB_SROM8_FEM_EXTPA_GAIN) >> SSB_SROM8_FEM_EXTPA_GAIN_SHIFT;
bus->sprom.fem.ghz5.pdet_range = (sprom[SPOFF(SSB_SPROM8_FEM5G)] &
SSB_SROM8_FEM_PDET_RANGE) >> SSB_SROM8_FEM_PDET_RANGE_SHIFT;
bus->sprom.fem.ghz5.tr_iso = (sprom[SPOFF(SSB_SPROM8_FEM5G)] &
SSB_SROM8_FEM_TR_ISO) >> SSB_SROM8_FEM_TR_ISO_SHIFT;
bus->sprom.fem.ghz5.antswlut = (sprom[SPOFF(SSB_SPROM8_FEM5G)] &
SSB_SROM8_FEM_ANTSWLUT) >> SSB_SROM8_FEM_ANTSWLUT_SHIFT;
bcma: read SPROM and extract MAC from it In case of BCMA cards SPROM is located in the ChipCommon core, it is not mapped as separated host window. So far we have met only SPROMs rev 8. SPROM layout seems to be the same as for SSB buses, so we decided to share SPROM struct and some defines. For now we extract MAC address only, this can be improved of course. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-06-02 00:08:51 +00:00
}
int bcma_sprom_get(struct bcma_bus *bus)
{
bcma: handle alternative SPROM location Some cards do not use additional 0x30 offset for SPROM location. We do not know the real condition for it yet, make it BCM4331 specific for now. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-17 09:00:59 +00:00
u16 offset;
bcma: read SPROM and extract MAC from it In case of BCMA cards SPROM is located in the ChipCommon core, it is not mapped as separated host window. So far we have met only SPROMs rev 8. SPROM layout seems to be the same as for SSB buses, so we decided to share SPROM struct and some defines. For now we extract MAC address only, this can be improved of course. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-06-02 00:08:51 +00:00
u16 *sprom;
int err = 0;
if (!bus->drv_cc.core)
return -EOPNOTSUPP;
bcma: add check if sprom is available before accessing it. The SoCs like the bcm4716 do not have a sprom on the bcma bus like a pcie device. It stores the values in some partition on flash memory. For ssb this informations are read out in the bcm47xx arch code, something like that should also be implemented for bcma. Without this patch bcma panics on SoCs. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-09 11:22:03 +00:00
if (!(bus->drv_cc.capabilities & BCMA_CC_CAP_SPROM))
return -ENOENT;
bcma: read SPROM and extract MAC from it In case of BCMA cards SPROM is located in the ChipCommon core, it is not mapped as separated host window. So far we have met only SPROMs rev 8. SPROM layout seems to be the same as for SSB buses, so we decided to share SPROM struct and some defines. For now we extract MAC address only, this can be improved of course. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-06-02 00:08:51 +00:00
sprom = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
GFP_KERNEL);
if (!sprom)
return -ENOMEM;
bcma: implement BCM4331 workaround for external PA lines We need to disable ext. PA lines for reading SPROM. It's disabled by default, but this patch allows using bcma after loading wl, which leaves workaround enabled. Cc: Arend van Spriel <arend@broadcom.com> Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-08-11 21:46:44 +00:00
if (bus->chipinfo.id == 0x4331)
bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, false);
bcma: handle alternative SPROM location Some cards do not use additional 0x30 offset for SPROM location. We do not know the real condition for it yet, make it BCM4331 specific for now. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-17 09:00:59 +00:00
/* Most cards have SPROM moved by additional offset 0x30 (48 dwords).
* According to brcm80211 this applies to cards with PCIe rev >= 6
* TODO: understand this condition and use it */
offset = (bus->chipinfo.id == 0x4331) ? BCMA_CC_SPROM :
BCMA_CC_SPROM_PCIE6;
bcma_sprom_read(bus, offset, sprom);
bcma: read SPROM and extract MAC from it In case of BCMA cards SPROM is located in the ChipCommon core, it is not mapped as separated host window. So far we have met only SPROMs rev 8. SPROM layout seems to be the same as for SSB buses, so we decided to share SPROM struct and some defines. For now we extract MAC address only, this can be improved of course. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-06-02 00:08:51 +00:00
bcma: implement BCM4331 workaround for external PA lines We need to disable ext. PA lines for reading SPROM. It's disabled by default, but this patch allows using bcma after loading wl, which leaves workaround enabled. Cc: Arend van Spriel <arend@broadcom.com> Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-08-11 21:46:44 +00:00
if (bus->chipinfo.id == 0x4331)
bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, true);
bcma: read SPROM and extract MAC from it In case of BCMA cards SPROM is located in the ChipCommon core, it is not mapped as separated host window. So far we have met only SPROMs rev 8. SPROM layout seems to be the same as for SSB buses, so we decided to share SPROM struct and some defines. For now we extract MAC address only, this can be improved of course. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-06-02 00:08:51 +00:00
err = bcma_sprom_valid(sprom);
if (err)
goto out;
bcma_sprom_extract_r8(bus, sprom);
out:
kfree(sprom);
return err;
}
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