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/*
* Copyright (c) 2011 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.
*/
/* ***** SDIO interface chip backplane handle functions ***** */
#include <linux/types.h>
#include <linux/netdevice.h>
#include <linux/mmc/card.h>
#include <chipcommon.h>
#include <brcm_hw_ids.h>
#include <brcmu_wifi.h>
#include <brcmu_utils.h>
#include <soc.h>
#include "dhd.h"
#include "dhd_dbg.h"
#include "sdio_host.h"
#include "sdio_chip.h"
/* chip core base & ramsize */
/* bcm4329 */
/* SDIO device core, ID 0x829 */
#define BCM4329_CORE_BUS_BASE 0x18011000
/* internal memory core, ID 0x80e */
#define BCM4329_CORE_SOCRAM_BASE 0x18003000
/* ARM Cortex M3 core, ID 0x82a */
#define BCM4329_CORE_ARM_BASE 0x18002000
#define BCM4329_RAMSIZE 0x48000
/* SB regs */
/* sbidhigh */
#define SBIDH_RC_MASK 0x000f /* revision code */
#define SBIDH_RCE_MASK 0x7000 /* revision code extension field */
#define SBIDH_RCE_SHIFT 8
#define SBCOREREV(sbidh) \
((((sbidh) & SBIDH_RCE_MASK) >> SBIDH_RCE_SHIFT) | \
((sbidh) & SBIDH_RC_MASK))
#define SBIDH_CC_MASK 0x8ff0 /* core code */
#define SBIDH_CC_SHIFT 4
#define SBIDH_VC_MASK 0xffff0000 /* vendor code */
#define SBIDH_VC_SHIFT 16
static u32
brcmf_sdio_chip_corerev(struct brcmf_sdio_dev *sdiodev,
u32 corebase)
{
u32 regdata;
regdata = brcmf_sdcard_reg_read(sdiodev,
CORE_SB(corebase, sbidhigh), 4);
return SBCOREREV(regdata);
}
bool
brcmf_sdio_chip_iscoreup(struct brcmf_sdio_dev *sdiodev,
u32 corebase)
{
u32 regdata;
regdata = brcmf_sdcard_reg_read(sdiodev,
CORE_SB(corebase, sbtmstatelow), 4);
regdata &= (SBTML_RESET | SBTML_REJ_MASK |
(SICF_CLOCK_EN << SBTML_SICF_SHIFT));
return ((SICF_CLOCK_EN << SBTML_SICF_SHIFT) == regdata);
}
void
brcmf_sdio_chip_coredisable(struct brcmf_sdio_dev *sdiodev, u32 corebase)
{
u32 regdata;
regdata = brcmf_sdcard_reg_read(sdiodev,
CORE_SB(corebase, sbtmstatelow), 4);
if (regdata & SBTML_RESET)
return;
regdata = brcmf_sdcard_reg_read(sdiodev,
CORE_SB(corebase, sbtmstatelow), 4);
if ((regdata & (SICF_CLOCK_EN << SBTML_SICF_SHIFT)) != 0) {
/*
* set target reject and spin until busy is clear
* (preserve core-specific bits)
*/
regdata = brcmf_sdcard_reg_read(sdiodev,
CORE_SB(corebase, sbtmstatelow), 4);
brcmf_sdcard_reg_write(sdiodev, CORE_SB(corebase, sbtmstatelow),
4, regdata | SBTML_REJ);
regdata = brcmf_sdcard_reg_read(sdiodev,
CORE_SB(corebase, sbtmstatelow), 4);
udelay(1);
SPINWAIT((brcmf_sdcard_reg_read(sdiodev,
CORE_SB(corebase, sbtmstatehigh), 4) &
SBTMH_BUSY), 100000);
regdata = brcmf_sdcard_reg_read(sdiodev,
CORE_SB(corebase, sbtmstatehigh), 4);
if (regdata & SBTMH_BUSY)
brcmf_dbg(ERROR, "core state still busy\n");
regdata = brcmf_sdcard_reg_read(sdiodev,
CORE_SB(corebase, sbidlow), 4);
if (regdata & SBIDL_INIT) {
regdata = brcmf_sdcard_reg_read(sdiodev,
CORE_SB(corebase, sbimstate), 4) |
SBIM_RJ;
brcmf_sdcard_reg_write(sdiodev,
CORE_SB(corebase, sbimstate), 4,
regdata);
regdata = brcmf_sdcard_reg_read(sdiodev,
CORE_SB(corebase, sbimstate), 4);
udelay(1);
SPINWAIT((brcmf_sdcard_reg_read(sdiodev,
CORE_SB(corebase, sbimstate), 4) &
SBIM_BY), 100000);
}
/* set reset and reject while enabling the clocks */
brcmf_sdcard_reg_write(sdiodev,
CORE_SB(corebase, sbtmstatelow), 4,
(((SICF_FGC | SICF_CLOCK_EN) << SBTML_SICF_SHIFT) |
SBTML_REJ | SBTML_RESET));
regdata = brcmf_sdcard_reg_read(sdiodev,
CORE_SB(corebase, sbtmstatelow), 4);
udelay(10);
/* clear the initiator reject bit */
regdata = brcmf_sdcard_reg_read(sdiodev,
CORE_SB(corebase, sbidlow), 4);
if (regdata & SBIDL_INIT) {
regdata = brcmf_sdcard_reg_read(sdiodev,
CORE_SB(corebase, sbimstate), 4) &
~SBIM_RJ;
brcmf_sdcard_reg_write(sdiodev,
CORE_SB(corebase, sbimstate), 4,
regdata);
}
}
/* leave reset and reject asserted */
brcmf_sdcard_reg_write(sdiodev, CORE_SB(corebase, sbtmstatelow), 4,
(SBTML_REJ | SBTML_RESET));
udelay(1);
}
static int brcmf_sdio_chip_recognition(struct brcmf_sdio_dev *sdiodev,
struct chip_info *ci, u32 regs)
{
u32 regdata;
/*
* Get CC core rev
* Chipid is assume to be at offset 0 from regs arg
* For different chiptypes or old sdio hosts w/o chipcommon,
* other ways of recognition should be added here.
*/
ci->cccorebase = regs;
regdata = brcmf_sdcard_reg_read(sdiodev,
CORE_CC_REG(ci->cccorebase, chipid), 4);
ci->chip = regdata & CID_ID_MASK;
ci->chiprev = (regdata & CID_REV_MASK) >> CID_REV_SHIFT;
brcmf_dbg(INFO, "chipid=0x%x chiprev=%d\n", ci->chip, ci->chiprev);
/* Address of cores for new chips should be added here */
switch (ci->chip) {
case BCM4329_CHIP_ID:
ci->buscorebase = BCM4329_CORE_BUS_BASE;
ci->ramcorebase = BCM4329_CORE_SOCRAM_BASE;
ci->armcorebase = BCM4329_CORE_ARM_BASE;
ci->ramsize = BCM4329_RAMSIZE;
break;
default:
brcmf_dbg(ERROR, "chipid 0x%x is not supported\n", ci->chip);
return -ENODEV;
}
return 0;
}
static int
brcmf_sdio_chip_buscoreprep(struct brcmf_sdio_dev *sdiodev)
{
int err = 0;
u8 clkval, clkset;
/* Try forcing SDIO core to do ALPAvail request only */
clkset = SBSDIO_FORCE_HW_CLKREQ_OFF | SBSDIO_ALP_AVAIL_REQ;
brcmf_sdcard_cfg_write(sdiodev, SDIO_FUNC_1,
SBSDIO_FUNC1_CHIPCLKCSR, clkset, &err);
if (err) {
brcmf_dbg(ERROR, "error writing for HT off\n");
return err;
}
/* If register supported, wait for ALPAvail and then force ALP */
/* This may take up to 15 milliseconds */
clkval = brcmf_sdcard_cfg_read(sdiodev, SDIO_FUNC_1,
SBSDIO_FUNC1_CHIPCLKCSR, NULL);
if ((clkval & ~SBSDIO_AVBITS) != clkset) {
brcmf_dbg(ERROR, "ChipClkCSR access: wrote 0x%02x read 0x%02x\n",
clkset, clkval);
return -EACCES;
}
SPINWAIT(((clkval = brcmf_sdcard_cfg_read(sdiodev, SDIO_FUNC_1,
SBSDIO_FUNC1_CHIPCLKCSR, NULL)),
!SBSDIO_ALPAV(clkval)),
PMU_MAX_TRANSITION_DLY);
if (!SBSDIO_ALPAV(clkval)) {
brcmf_dbg(ERROR, "timeout on ALPAV wait, clkval 0x%02x\n",
clkval);
return -EBUSY;
}
clkset = SBSDIO_FORCE_HW_CLKREQ_OFF | SBSDIO_FORCE_ALP;
brcmf_sdcard_cfg_write(sdiodev, SDIO_FUNC_1,
SBSDIO_FUNC1_CHIPCLKCSR, clkset, &err);
udelay(65);
/* Also, disable the extra SDIO pull-ups */
brcmf_sdcard_cfg_write(sdiodev, SDIO_FUNC_1,
SBSDIO_FUNC1_SDIOPULLUP, 0, NULL);
return 0;
}
static void
brcmf_sdio_chip_buscoresetup(struct brcmf_sdio_dev *sdiodev,
struct chip_info *ci)
{
u32 regdata;
/* get chipcommon rev */
ci->ccrev = brcmf_sdio_chip_corerev(sdiodev, ci->cccorebase);
/* get chipcommon capabilites */
ci->cccaps = brcmf_sdcard_reg_read(sdiodev,
CORE_CC_REG(ci->cccorebase, capabilities), 4);
/* get pmu caps & rev */
if (ci->cccaps & CC_CAP_PMU) {
ci->pmucaps = brcmf_sdcard_reg_read(sdiodev,
CORE_CC_REG(ci->cccorebase, pmucapabilities), 4);
ci->pmurev = ci->pmucaps & PCAP_REV_MASK;
}
ci->buscorerev = brcmf_sdio_chip_corerev(sdiodev, ci->buscorebase);
regdata = brcmf_sdcard_reg_read(sdiodev,
CORE_SB(ci->buscorebase, sbidhigh), 4);
ci->buscoretype = (regdata & SBIDH_CC_MASK) >> SBIDH_CC_SHIFT;
brcmf_dbg(INFO, "ccrev=%d, pmurev=%d, buscore rev/type=%d/0x%x\n",
ci->ccrev, ci->pmurev, ci->buscorerev, ci->buscoretype);
/*
* Make sure any on-chip ARM is off (in case strapping is wrong),
* or downloaded code was already running.
*/
brcmf_sdio_chip_coredisable(sdiodev, ci->armcorebase);
}
int brcmf_sdio_chip_attach(struct brcmf_sdio_dev *sdiodev,
struct chip_info **ci_ptr, u32 regs)
{
int ret;
struct chip_info *ci;
brcmf_dbg(TRACE, "Enter\n");
/* alloc chip_info_t */
ci = kzalloc(sizeof(struct chip_info), GFP_ATOMIC);
if (!ci)
return -ENOMEM;
ret = brcmf_sdio_chip_buscoreprep(sdiodev);
if (ret != 0)
goto err;
ret = brcmf_sdio_chip_recognition(sdiodev, ci, regs);
if (ret != 0)
goto err;
brcmf_sdio_chip_buscoresetup(sdiodev, ci);
brcmf_sdcard_reg_write(sdiodev,
CORE_CC_REG(ci->cccorebase, gpiopullup), 4, 0);
brcmf_sdcard_reg_write(sdiodev,
CORE_CC_REG(ci->cccorebase, gpiopulldown), 4, 0);
*ci_ptr = ci;
return 0;
err:
kfree(ci);
return ret;
}
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