blob: 4b26ec896a96f77f1ffef78c0922342027a3e3dd [file] [log] [blame]
/* Copyright Statement:
*
* This software/firmware and related documentation ("MediaTek Software") are
* protected under relevant copyright laws. The information contained herein
* is confidential and proprietary to MediaTek Inc. and/or its licensors.
* Without the prior written permission of MediaTek inc. and/or its licensors,
* any reproduction, modification, use or disclosure of MediaTek Software,
* and information contained herein, in whole or in part, shall be strictly prohibited.
*
* MediaTek Inc. (C) 2010. All rights reserved.
*
* BY OPENING THIS FILE, RECEIVER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
* THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
* RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO RECEIVER ON
* AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
* NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
* SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
* SUPPLIED WITH THE MEDIATEK SOFTWARE, AND RECEIVER AGREES TO LOOK ONLY TO SUCH
* THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. RECEIVER EXPRESSLY ACKNOWLEDGES
* THAT IT IS RECEIVER'S SOLE RESPONSIBILITY TO OBTAIN FROM ANY THIRD PARTY ALL PROPER LICENSES
* CONTAINED IN MEDIATEK SOFTWARE. MEDIATEK SHALL ALSO NOT BE RESPONSIBLE FOR ANY MEDIATEK
* SOFTWARE RELEASES MADE TO RECEIVER'S SPECIFICATION OR TO CONFORM TO A PARTICULAR
* STANDARD OR OPEN FORUM. RECEIVER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND
* CUMULATIVE LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
* AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
* OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY RECEIVER TO
* MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
*
* The following software/firmware and/or related documentation ("MediaTek Software")
* have been modified by MediaTek Inc. All revisions are subject to any receiver's
* applicable license agreements with MediaTek Inc.
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/sd.h>
#include <linux/mmc/sdio.h>
#include <asm/mach-ralink/ralink_regs.h>
#include "board.h"
#include "dbg.h"
#include "mt6575_sd.h"
#ifdef CONFIG_SOC_MT7621
#define RALINK_SYSCTL_BASE 0xbe000000
#else
#define RALINK_SYSCTL_BASE 0xb0000000
#endif
#define DRV_NAME "mtk-sd"
#if defined(CONFIG_SOC_MT7620)
#define HOST_MAX_MCLK (48000000) /* +/- by chhung */
#elif defined(CONFIG_SOC_MT7621)
#define HOST_MAX_MCLK (50000000) /* +/- by chhung */
#endif
#define HOST_MIN_MCLK (260000)
#define HOST_MAX_BLKSZ (2048)
#define MSDC_OCR_AVAIL (MMC_VDD_28_29 | MMC_VDD_29_30 | MMC_VDD_30_31 | MMC_VDD_31_32 | MMC_VDD_32_33)
#define GPIO_PULL_DOWN (0)
#define GPIO_PULL_UP (1)
#define DEFAULT_DEBOUNCE (8) /* 8 cycles */
#define DEFAULT_DTOC (40) /* data timeout counter. 65536x40 sclk. */
#define CMD_TIMEOUT (HZ / 10) /* 100ms */
#define DAT_TIMEOUT (HZ / 2 * 5) /* 500ms x5 */
#define MAX_DMA_CNT (64 * 1024 - 512) /* a single transaction for WIFI may be 50K*/
#define MAX_GPD_NUM (1 + 1) /* one null gpd */
#define MAX_BD_NUM (1024)
#define MAX_HW_SGMTS (MAX_BD_NUM)
#define MAX_SGMT_SZ (MAX_DMA_CNT)
#define MAX_REQ_SZ (MAX_SGMT_SZ * 8)
static int cd_active_low = 1;
//=================================
#define PERI_MSDC0_PDN (15)
//#define PERI_MSDC1_PDN (16)
//#define PERI_MSDC2_PDN (17)
//#define PERI_MSDC3_PDN (18)
/* +++ by chhung */
struct msdc_hw msdc0_hw = {
.clk_src = 0,
.flags = MSDC_CD_PIN_EN | MSDC_REMOVABLE,
// .flags = MSDC_WP_PIN_EN | MSDC_CD_PIN_EN | MSDC_REMOVABLE,
};
/* end of +++ */
static int msdc_rsp[] = {
0, /* RESP_NONE */
1, /* RESP_R1 */
2, /* RESP_R2 */
3, /* RESP_R3 */
4, /* RESP_R4 */
1, /* RESP_R5 */
1, /* RESP_R6 */
1, /* RESP_R7 */
7, /* RESP_R1b */
};
#define msdc_dma_on() sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_PIO)
static void msdc_reset_hw(struct msdc_host *host)
{
sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_RST);
while (readl(host->base + MSDC_CFG) & MSDC_CFG_RST)
cpu_relax();
}
#define msdc_clr_int() \
do { \
volatile u32 val = readl(host->base + MSDC_INT); \
writel(val, host->base + MSDC_INT); \
} while (0)
static void msdc_clr_fifo(struct msdc_host *host)
{
sdr_set_bits(host->base + MSDC_FIFOCS, MSDC_FIFOCS_CLR);
while (readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_CLR)
cpu_relax();
}
#define msdc_irq_save(val) \
do { \
val = readl(host->base + MSDC_INTEN); \
sdr_clr_bits(host->base + MSDC_INTEN, val); \
} while (0)
/* clock source for host: global */
#if defined(CONFIG_SOC_MT7620)
static u32 hclks[] = {48000000}; /* +/- by chhung */
#elif defined(CONFIG_SOC_MT7621)
static u32 hclks[] = {50000000}; /* +/- by chhung */
#endif
#define sdc_is_busy() (readl(host->base + SDC_STS) & SDC_STS_SDCBUSY)
#define sdc_is_cmd_busy() (readl(host->base + SDC_STS) & SDC_STS_CMDBUSY)
#define sdc_send_cmd(cmd, arg) \
do { \
writel((arg), host->base + SDC_ARG); \
writel((cmd), host->base + SDC_CMD); \
} while (0)
/* +++ by chhung */
#ifndef __ASSEMBLY__
#define PHYSADDR(a) (((unsigned long)(a)) & 0x1fffffff)
#else
#define PHYSADDR(a) ((a) & 0x1fffffff)
#endif
/* end of +++ */
static unsigned int msdc_do_command(struct msdc_host *host,
struct mmc_command *cmd,
int tune,
unsigned long timeout);
static int msdc_tune_cmdrsp(struct msdc_host *host, struct mmc_command *cmd);
static void msdc_set_timeout(struct msdc_host *host, u32 ns, u32 clks)
{
u32 timeout, clk_ns;
host->timeout_ns = ns;
host->timeout_clks = clks;
clk_ns = 1000000000UL / host->sclk;
timeout = ns / clk_ns + clks;
timeout = timeout >> 16; /* in 65536 sclk cycle unit */
timeout = timeout > 1 ? timeout - 1 : 0;
timeout = timeout > 255 ? 255 : timeout;
sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, timeout);
}
static void msdc_tasklet_card(struct work_struct *work)
{
struct msdc_host *host = (struct msdc_host *)container_of(work,
struct msdc_host, card_delaywork.work);
u32 inserted;
u32 status = 0;
spin_lock(&host->lock);
status = readl(host->base + MSDC_PS);
if (cd_active_low)
inserted = (status & MSDC_PS_CDSTS) ? 0 : 1;
else
inserted = (status & MSDC_PS_CDSTS) ? 1 : 0;
/* Make sure: handle the last interrupt */
host->card_inserted = inserted;
if (!host->suspend) {
host->mmc->f_max = HOST_MAX_MCLK;
mmc_detect_change(host->mmc, msecs_to_jiffies(20));
}
spin_unlock(&host->lock);
}
static void msdc_set_mclk(struct msdc_host *host, int ddr, unsigned int hz)
{
//struct msdc_hw *hw = host->hw;
u32 mode;
u32 flags;
u32 div;
u32 sclk;
u32 hclk = host->hclk;
//u8 clksrc = hw->clk_src;
if (!hz) { // set mmc system clock to 0 ?
msdc_reset_hw(host);
return;
}
msdc_irq_save(flags);
if (ddr) {
mode = 0x2; /* ddr mode and use divisor */
if (hz >= (hclk >> 2)) {
div = 1; /* mean div = 1/4 */
sclk = hclk >> 2; /* sclk = clk / 4 */
} else {
div = (hclk + ((hz << 2) - 1)) / (hz << 2);
sclk = (hclk >> 2) / div;
}
} else if (hz >= hclk) { /* bug fix */
mode = 0x1; /* no divisor and divisor is ignored */
div = 0;
sclk = hclk;
} else {
mode = 0x0; /* use divisor */
if (hz >= (hclk >> 1)) {
div = 0; /* mean div = 1/2 */
sclk = hclk >> 1; /* sclk = clk / 2 */
} else {
div = (hclk + ((hz << 2) - 1)) / (hz << 2);
sclk = (hclk >> 2) / div;
}
}
/* set clock mode and divisor */
sdr_set_field(host->base + MSDC_CFG, MSDC_CFG_CKMOD, mode);
sdr_set_field(host->base + MSDC_CFG, MSDC_CFG_CKDIV, div);
/* wait clock stable */
while (!(readl(host->base + MSDC_CFG) & MSDC_CFG_CKSTB))
cpu_relax();
host->sclk = sclk;
host->mclk = hz;
msdc_set_timeout(host, host->timeout_ns, host->timeout_clks); // need?
sdr_set_bits(host->base + MSDC_INTEN, flags);
}
/* Fix me. when need to abort */
static void msdc_abort_data(struct msdc_host *host)
{
struct mmc_command *stop = host->mrq->stop;
dev_err(mmc_dev(host->mmc), "%d -> Need to Abort.\n", host->id);
msdc_reset_hw(host);
msdc_clr_fifo(host);
msdc_clr_int();
// need to check FIFO count 0 ?
if (stop) { /* try to stop, but may not success */
dev_err(mmc_dev(host->mmc), "%d -> stop when abort CMD<%d>\n",
host->id, stop->opcode);
(void)msdc_do_command(host, stop, 0, CMD_TIMEOUT);
}
//if (host->mclk >= 25000000) {
// msdc_set_mclk(host, 0, host->mclk >> 1);
//}
}
#ifdef CONFIG_PM
/*
* register as callback function of WIFI(combo_sdio_register_pm) .
* can called by msdc_drv_suspend/resume too.
*/
static void msdc_pm(pm_message_t state, void *data)
{
struct msdc_host *host = (struct msdc_host *)data;
int evt = state.event;
if (evt == PM_EVENT_SUSPEND || evt == PM_EVENT_USER_SUSPEND) {
if (host->suspend) /* already suspend */ /* default 0*/
return;
/* for memory card. already power off by mmc */
if (evt == PM_EVENT_SUSPEND && host->power_mode == MMC_POWER_OFF)
return;
host->suspend = 1;
host->pm_state = state; /* default PMSG_RESUME */
} else if (evt == PM_EVENT_RESUME || evt == PM_EVENT_USER_RESUME) {
if (!host->suspend)
return;
/* No PM resume when USR suspend */
if (evt == PM_EVENT_RESUME && host->pm_state.event == PM_EVENT_USER_SUSPEND) {
dev_err(mmc_dev(host->mmc),
"%d -> PM Resume when in USR Suspend\n",
host->id); /* won't happen. */
return;
}
host->suspend = 0;
host->pm_state = state;
}
}
#endif
static inline u32 msdc_cmd_find_resp(struct mmc_command *cmd)
{
u32 opcode = cmd->opcode;
u32 resp;
if (opcode == MMC_SET_RELATIVE_ADDR) {
resp = (mmc_cmd_type(cmd) == MMC_CMD_BCR) ? RESP_R6 : RESP_R1;
} else if (opcode == MMC_FAST_IO) {
resp = RESP_R4;
} else if (opcode == MMC_GO_IRQ_STATE) {
resp = RESP_R5;
} else if (opcode == MMC_SELECT_CARD) {
resp = (cmd->arg != 0) ? RESP_R1B : RESP_NONE;
} else if (opcode == SD_IO_RW_DIRECT || opcode == SD_IO_RW_EXTENDED) {
resp = RESP_R1; /* SDIO workaround. */
} else if (opcode == SD_SEND_IF_COND && (mmc_cmd_type(cmd) == MMC_CMD_BCR)) {
resp = RESP_R1;
} else {
switch (mmc_resp_type(cmd)) {
case MMC_RSP_R1:
resp = RESP_R1;
break;
case MMC_RSP_R1B:
resp = RESP_R1B;
break;
case MMC_RSP_R2:
resp = RESP_R2;
break;
case MMC_RSP_R3:
resp = RESP_R3;
break;
case MMC_RSP_NONE:
default:
resp = RESP_NONE;
break;
}
}
return resp;
}
/*--------------------------------------------------------------------------*/
/* mmc_host_ops members */
/*--------------------------------------------------------------------------*/
static unsigned int msdc_command_start(struct msdc_host *host,
struct mmc_command *cmd,
unsigned long timeout)
{
u32 opcode = cmd->opcode;
u32 rawcmd;
u32 wints = MSDC_INT_CMDRDY | MSDC_INT_RSPCRCERR | MSDC_INT_CMDTMO |
MSDC_INT_ACMDRDY | MSDC_INT_ACMDCRCERR | MSDC_INT_ACMDTMO |
MSDC_INT_ACMD19_DONE;
u32 resp;
unsigned long tmo;
/* Protocol layer does not provide response type, but our hardware needs
* to know exact type, not just size!
*/
resp = msdc_cmd_find_resp(cmd);
cmd->error = 0;
/* rawcmd :
* vol_swt << 30 | auto_cmd << 28 | blklen << 16 | go_irq << 15 |
* stop << 14 | rw << 13 | dtype << 11 | rsptyp << 7 | brk << 6 | opcode
*/
rawcmd = opcode | msdc_rsp[resp] << 7 | host->blksz << 16;
if (opcode == MMC_READ_MULTIPLE_BLOCK) {
rawcmd |= (2 << 11);
} else if (opcode == MMC_READ_SINGLE_BLOCK) {
rawcmd |= (1 << 11);
} else if (opcode == MMC_WRITE_MULTIPLE_BLOCK) {
rawcmd |= ((2 << 11) | (1 << 13));
} else if (opcode == MMC_WRITE_BLOCK) {
rawcmd |= ((1 << 11) | (1 << 13));
} else if (opcode == SD_IO_RW_EXTENDED) {
if (cmd->data->flags & MMC_DATA_WRITE)
rawcmd |= (1 << 13);
if (cmd->data->blocks > 1)
rawcmd |= (2 << 11);
else
rawcmd |= (1 << 11);
} else if (opcode == SD_IO_RW_DIRECT && cmd->flags == (unsigned int)-1) {
rawcmd |= (1 << 14);
} else if ((opcode == SD_APP_SEND_SCR) ||
(opcode == SD_APP_SEND_NUM_WR_BLKS) ||
(opcode == SD_SWITCH && (mmc_cmd_type(cmd) == MMC_CMD_ADTC)) ||
(opcode == SD_APP_SD_STATUS && (mmc_cmd_type(cmd) == MMC_CMD_ADTC)) ||
(opcode == MMC_SEND_EXT_CSD && (mmc_cmd_type(cmd) == MMC_CMD_ADTC))) {
rawcmd |= (1 << 11);
} else if (opcode == MMC_STOP_TRANSMISSION) {
rawcmd |= (1 << 14);
rawcmd &= ~(0x0FFF << 16);
}
tmo = jiffies + timeout;
if (opcode == MMC_SEND_STATUS) {
for (;;) {
if (!sdc_is_cmd_busy())
break;
if (time_after(jiffies, tmo)) {
dev_err(mmc_dev(host->mmc),
"%d -> XXX cmd_busy timeout: before CMD<%d>\n",
host->id, opcode);
cmd->error = -ETIMEDOUT;
msdc_reset_hw(host);
goto end;
}
}
} else {
for (;;) {
if (!sdc_is_busy())
break;
if (time_after(jiffies, tmo)) {
dev_err(mmc_dev(host->mmc),
"%d -> XXX sdc_busy timeout: before CMD<%d>\n",
host->id, opcode);
cmd->error = -ETIMEDOUT;
msdc_reset_hw(host);
goto end;
}
}
}
//BUG_ON(in_interrupt());
host->cmd = cmd;
host->cmd_rsp = resp;
init_completion(&host->cmd_done);
sdr_set_bits(host->base + MSDC_INTEN, wints);
sdc_send_cmd(rawcmd, cmd->arg);
end:
return cmd->error;
}
static unsigned int msdc_command_resp(struct msdc_host *host,
struct mmc_command *cmd,
int tune,
unsigned long timeout)
__must_hold(&host->lock)
{
u32 opcode = cmd->opcode;
//u32 rawcmd;
u32 wints = MSDC_INT_CMDRDY | MSDC_INT_RSPCRCERR | MSDC_INT_CMDTMO |
MSDC_INT_ACMDRDY | MSDC_INT_ACMDCRCERR | MSDC_INT_ACMDTMO |
MSDC_INT_ACMD19_DONE;
BUG_ON(in_interrupt());
//init_completion(&host->cmd_done);
//sdr_set_bits(host->base + MSDC_INTEN, wints);
spin_unlock(&host->lock);
if (!wait_for_completion_timeout(&host->cmd_done, 10 * timeout)) {
dev_err(mmc_dev(host->mmc),
"%d -> XXX CMD<%d> wait_for_completion timeout ARG<0x%.8x>\n",
host->id, opcode, cmd->arg);
cmd->error = -ETIMEDOUT;
msdc_reset_hw(host);
}
spin_lock(&host->lock);
sdr_clr_bits(host->base + MSDC_INTEN, wints);
host->cmd = NULL;
//end:
/* do we need to save card's RCA when SD_SEND_RELATIVE_ADDR */
if (!tune)
return cmd->error;
/* memory card CRC */
if (host->hw->flags & MSDC_REMOVABLE && cmd->error == -EIO) {
/* check if has data phase */
if (readl(host->base + SDC_CMD) & 0x1800) {
msdc_abort_data(host);
} else {
/* do basic: reset*/
msdc_reset_hw(host);
msdc_clr_fifo(host);
msdc_clr_int();
}
cmd->error = msdc_tune_cmdrsp(host, cmd);
}
// check DAT0
/* if (resp == RESP_R1B) {
while ((readl(host->base + MSDC_PS) & 0x10000) != 0x10000);
} */
/* CMD12 Error Handle */
return cmd->error;
}
static unsigned int msdc_do_command(struct msdc_host *host,
struct mmc_command *cmd,
int tune,
unsigned long timeout)
{
if (msdc_command_start(host, cmd, timeout))
goto end;
if (msdc_command_resp(host, cmd, tune, timeout))
goto end;
end:
return cmd->error;
}
static void msdc_dma_start(struct msdc_host *host)
{
u32 wints = MSDC_INTEN_XFER_COMPL | MSDC_INTEN_DATTMO | MSDC_INTEN_DATCRCERR;
sdr_set_bits(host->base + MSDC_INTEN, wints);
//dsb(); /* --- by chhung */
sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_START, 1);
}
static void msdc_dma_stop(struct msdc_host *host)
{
//u32 retries=500;
u32 wints = MSDC_INTEN_XFER_COMPL | MSDC_INTEN_DATTMO | MSDC_INTEN_DATCRCERR;
//while (readl(host->base + MSDC_DMA_CFG) & MSDC_DMA_CFG_STS);
sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_STOP, 1);
while (readl(host->base + MSDC_DMA_CFG) & MSDC_DMA_CFG_STS)
;
//dsb(); /* --- by chhung */
sdr_clr_bits(host->base + MSDC_INTEN, wints); /* Not just xfer_comp */
}
/* calc checksum */
static u8 msdc_dma_calcs(u8 *buf, u32 len)
{
u32 i, sum = 0;
for (i = 0; i < len; i++)
sum += buf[i];
return 0xFF - (u8)sum;
}
static void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma,
struct scatterlist *sg_cmd, unsigned int sglen)
{
struct scatterlist *sg;
struct gpd *gpd;
struct bd *bd;
u32 j;
BUG_ON(sglen > MAX_BD_NUM); /* not support currently */
gpd = dma->gpd;
bd = dma->bd;
/* modify gpd*/
//gpd->intr = 0;
gpd->hwo = 1; /* hw will clear it */
gpd->bdp = 1;
gpd->chksum = 0; /* need to clear first. */
gpd->chksum = msdc_dma_calcs((u8 *)gpd, 16);
/* modify bd*/
for_each_sg(sg_cmd, sg, sglen, j) {
bd[j].blkpad = 0;
bd[j].dwpad = 0;
bd[j].ptr = (void *)sg_dma_address(sg);
bd[j].buflen = sg_dma_len(sg);
if (j == sglen - 1)
bd[j].eol = 1; /* the last bd */
else
bd[j].eol = 0;
bd[j].chksum = 0; /* checksume need to clear first */
bd[j].chksum = msdc_dma_calcs((u8 *)(&bd[j]), 16);
}
sdr_set_field(host->base + MSDC_DMA_CFG, MSDC_DMA_CFG_DECSEN, 1);
sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_BRUSTSZ,
MSDC_BRUST_64B);
sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_MODE, 1);
writel(PHYSADDR((u32)dma->gpd_addr), host->base + MSDC_DMA_SA);
}
static int msdc_do_request(struct mmc_host *mmc, struct mmc_request *mrq)
__must_hold(&host->lock)
{
struct msdc_host *host = mmc_priv(mmc);
struct mmc_command *cmd;
struct mmc_data *data;
//u32 intsts = 0;
int read = 1, send_type = 0;
#define SND_DAT 0
#define SND_CMD 1
BUG_ON(!mmc);
BUG_ON(!mrq);
host->error = 0;
cmd = mrq->cmd;
data = mrq->cmd->data;
if (!data) {
send_type = SND_CMD;
if (msdc_do_command(host, cmd, 1, CMD_TIMEOUT) != 0)
goto done;
} else {
BUG_ON(data->blksz > HOST_MAX_BLKSZ);
send_type = SND_DAT;
data->error = 0;
read = data->flags & MMC_DATA_READ ? 1 : 0;
host->data = data;
host->xfer_size = data->blocks * data->blksz;
host->blksz = data->blksz;
if (read) {
if ((host->timeout_ns != data->timeout_ns) ||
(host->timeout_clks != data->timeout_clks)) {
msdc_set_timeout(host, data->timeout_ns, data->timeout_clks);
}
}
writel(data->blocks, host->base + SDC_BLK_NUM);
//msdc_clr_fifo(host); /* no need */
msdc_dma_on(); /* enable DMA mode first!! */
init_completion(&host->xfer_done);
/* start the command first*/
if (msdc_command_start(host, cmd, CMD_TIMEOUT) != 0)
goto done;
data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
data->sg_len,
mmc_get_dma_dir(data));
msdc_dma_setup(host, &host->dma, data->sg,
data->sg_count);
/* then wait command done */
if (msdc_command_resp(host, cmd, 1, CMD_TIMEOUT) != 0)
goto done;
/* for read, the data coming too fast, then CRC error
* start DMA no business with CRC.
*/
//init_completion(&host->xfer_done);
msdc_dma_start(host);
spin_unlock(&host->lock);
if (!wait_for_completion_timeout(&host->xfer_done, DAT_TIMEOUT)) {
dev_err(mmc_dev(host->mmc),
"%d -> XXX CMD<%d> wait xfer_done<%d> timeout!!\n",
host->id, cmd->opcode,
data->blocks * data->blksz);
dev_err(mmc_dev(host->mmc),
"%d -> DMA_SA = 0x%x\n",
host->id, readl(host->base + MSDC_DMA_SA));
dev_err(mmc_dev(host->mmc),
"%d -> DMA_CA = 0x%x\n",
host->id, readl(host->base + MSDC_DMA_CA));
dev_err(mmc_dev(host->mmc),
"%d -> DMA_CTRL = 0x%x\n",
host->id, readl(host->base + MSDC_DMA_CTRL));
dev_err(mmc_dev(host->mmc),
"%d -> DMA_CFG = 0x%x\n",
host->id, readl(host->base + MSDC_DMA_CFG));
data->error = -ETIMEDOUT;
msdc_reset_hw(host);
msdc_clr_fifo(host);
msdc_clr_int();
}
spin_lock(&host->lock);
msdc_dma_stop(host);
/* Last: stop transfer */
if (data->stop) {
if (msdc_do_command(host, data->stop, 0, CMD_TIMEOUT) != 0)
goto done;
}
}
done:
if (data) {
host->data = NULL;
dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
mmc_get_dma_dir(data));
host->blksz = 0;
}
if (mrq->cmd->error)
host->error = 0x001;
if (mrq->data && mrq->data->error)
host->error |= 0x010;
if (mrq->stop && mrq->stop->error)
host->error |= 0x100;
return host->error;
}
static int msdc_app_cmd(struct mmc_host *mmc, struct msdc_host *host)
{
struct mmc_command cmd;
struct mmc_request mrq;
u32 err;
memset(&cmd, 0, sizeof(struct mmc_command));
cmd.opcode = MMC_APP_CMD;
cmd.arg = host->app_cmd_arg;
cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
memset(&mrq, 0, sizeof(struct mmc_request));
mrq.cmd = &cmd; cmd.mrq = &mrq;
cmd.data = NULL;
err = msdc_do_command(host, &cmd, 0, CMD_TIMEOUT);
return err;
}
static int msdc_tune_cmdrsp(struct msdc_host *host, struct mmc_command *cmd)
{
int result = -1;
u32 rsmpl, cur_rsmpl, orig_rsmpl;
u32 rrdly, cur_rrdly = 0xffffffff, orig_rrdly;
u32 skip = 1;
/* ==== don't support 3.0 now ====
* 1: R_SMPL[1]
* 2: PAD_CMD_RESP_RXDLY[26:22]
* ==========================
*/
// save the previous tune result
sdr_get_field(host->base + MSDC_IOCON, MSDC_IOCON_RSPL, &orig_rsmpl);
sdr_get_field(host->base + MSDC_PAD_TUNE, MSDC_PAD_TUNE_CMDRRDLY,
&orig_rrdly);
rrdly = 0;
do {
for (rsmpl = 0; rsmpl < 2; rsmpl++) {
/* Lv1: R_SMPL[1] */
cur_rsmpl = (orig_rsmpl + rsmpl) % 2;
if (skip == 1) {
skip = 0;
continue;
}
sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_RSPL,
cur_rsmpl);
if (host->app_cmd) {
result = msdc_app_cmd(host->mmc, host);
if (result) {
dev_err(mmc_dev(host->mmc),
"%d -> TUNE_CMD app_cmd<%d> failed: RESP_RXDLY<%d>,R_SMPL<%d>\n",
host->id,
host->mrq->cmd->opcode,
cur_rrdly, cur_rsmpl);
continue;
}
}
result = msdc_do_command(host, cmd, 0, CMD_TIMEOUT); // not tune.
dev_err(mmc_dev(host->mmc),
"%d -> TUNE_CMD<%d> %s PAD_CMD_RESP_RXDLY[26:22]<%d> R_SMPL[1]<%d>\n",
host->id, cmd->opcode,
(result == 0) ? "PASS" : "FAIL", cur_rrdly,
cur_rsmpl);
if (result == 0)
return 0;
if (result != -EIO) {
dev_err(mmc_dev(host->mmc),
"%d -> TUNE_CMD<%d> Error<%d> not -EIO\n",
host->id, cmd->opcode, result);
return result;
}
/* should be EIO */
/* check if has data phase */
if (readl(host->base + SDC_CMD) & 0x1800)
msdc_abort_data(host);
}
/* Lv2: PAD_CMD_RESP_RXDLY[26:22] */
cur_rrdly = (orig_rrdly + rrdly + 1) % 32;
sdr_set_field(host->base + MSDC_PAD_TUNE,
MSDC_PAD_TUNE_CMDRRDLY, cur_rrdly);
} while (++rrdly < 32);
return result;
}
/* Support SD2.0 Only */
static int msdc_tune_bread(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct msdc_host *host = mmc_priv(mmc);
u32 ddr = 0;
u32 dcrc = 0;
u32 rxdly, cur_rxdly0, cur_rxdly1;
u32 dsmpl, cur_dsmpl, orig_dsmpl;
u32 cur_dat0, cur_dat1, cur_dat2, cur_dat3;
u32 cur_dat4, cur_dat5, cur_dat6, cur_dat7;
u32 orig_dat0, orig_dat1, orig_dat2, orig_dat3;
u32 orig_dat4, orig_dat5, orig_dat6, orig_dat7;
int result = -1;
u32 skip = 1;
sdr_get_field(host->base + MSDC_IOCON, MSDC_IOCON_DSPL, &orig_dsmpl);
/* Tune Method 2. */
sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_DDLSEL, 1);
rxdly = 0;
do {
for (dsmpl = 0; dsmpl < 2; dsmpl++) {
cur_dsmpl = (orig_dsmpl + dsmpl) % 2;
if (skip == 1) {
skip = 0;
continue;
}
sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_DSPL,
cur_dsmpl);
if (host->app_cmd) {
result = msdc_app_cmd(host->mmc, host);
if (result) {
dev_err(mmc_dev(host->mmc),
"%d -> TUNE_BREAD app_cmd<%d> failed\n",
host->id,
host->mrq->cmd->opcode);
continue;
}
}
result = msdc_do_request(mmc, mrq);
sdr_get_field(host->base + SDC_DCRC_STS,
SDC_DCRC_STS_POS | SDC_DCRC_STS_NEG,
&dcrc); /* RO */
if (!ddr)
dcrc &= ~SDC_DCRC_STS_NEG;
dev_err(mmc_dev(host->mmc),
"%d -> TUNE_BREAD<%s> dcrc<0x%x> DATRDDLY0/1<0x%x><0x%x> dsmpl<0x%x>\n",
host->id,
(result == 0 && dcrc == 0) ? "PASS" : "FAIL",
dcrc, readl(host->base + MSDC_DAT_RDDLY0),
readl(host->base + MSDC_DAT_RDDLY1),
cur_dsmpl);
/* Fix me: result is 0, but dcrc is still exist */
if (result == 0 && dcrc == 0) {
goto done;
} else {
/* there is a case: command timeout, and data phase not processed */
if (mrq->data->error != 0 &&
mrq->data->error != -EIO) {
dev_err(mmc_dev(host->mmc),
"%d -> TUNE_READ: result<0x%x> cmd_error<%d> data_error<%d>\n",
host->id, result,
mrq->cmd->error,
mrq->data->error);
goto done;
}
}
}
cur_rxdly0 = readl(host->base + MSDC_DAT_RDDLY0);
cur_rxdly1 = readl(host->base + MSDC_DAT_RDDLY1);
/* E1 ECO. YD: Reverse */
if (readl(host->base + MSDC_ECO_VER) >= 4) {
orig_dat0 = (cur_rxdly0 >> 24) & 0x1F;
orig_dat1 = (cur_rxdly0 >> 16) & 0x1F;
orig_dat2 = (cur_rxdly0 >> 8) & 0x1F;
orig_dat3 = (cur_rxdly0 >> 0) & 0x1F;
orig_dat4 = (cur_rxdly1 >> 24) & 0x1F;
orig_dat5 = (cur_rxdly1 >> 16) & 0x1F;
orig_dat6 = (cur_rxdly1 >> 8) & 0x1F;
orig_dat7 = (cur_rxdly1 >> 0) & 0x1F;
} else {
orig_dat0 = (cur_rxdly0 >> 0) & 0x1F;
orig_dat1 = (cur_rxdly0 >> 8) & 0x1F;
orig_dat2 = (cur_rxdly0 >> 16) & 0x1F;
orig_dat3 = (cur_rxdly0 >> 24) & 0x1F;
orig_dat4 = (cur_rxdly1 >> 0) & 0x1F;
orig_dat5 = (cur_rxdly1 >> 8) & 0x1F;
orig_dat6 = (cur_rxdly1 >> 16) & 0x1F;
orig_dat7 = (cur_rxdly1 >> 24) & 0x1F;
}
if (ddr) {
cur_dat0 = (dcrc & (1 << 0) || dcrc & (1 << 8)) ? ((orig_dat0 + 1) % 32) : orig_dat0;
cur_dat1 = (dcrc & (1 << 1) || dcrc & (1 << 9)) ? ((orig_dat1 + 1) % 32) : orig_dat1;
cur_dat2 = (dcrc & (1 << 2) || dcrc & (1 << 10)) ? ((orig_dat2 + 1) % 32) : orig_dat2;
cur_dat3 = (dcrc & (1 << 3) || dcrc & (1 << 11)) ? ((orig_dat3 + 1) % 32) : orig_dat3;
} else {
cur_dat0 = (dcrc & (1 << 0)) ? ((orig_dat0 + 1) % 32) : orig_dat0;
cur_dat1 = (dcrc & (1 << 1)) ? ((orig_dat1 + 1) % 32) : orig_dat1;
cur_dat2 = (dcrc & (1 << 2)) ? ((orig_dat2 + 1) % 32) : orig_dat2;
cur_dat3 = (dcrc & (1 << 3)) ? ((orig_dat3 + 1) % 32) : orig_dat3;
}
cur_dat4 = (dcrc & (1 << 4)) ? ((orig_dat4 + 1) % 32) : orig_dat4;
cur_dat5 = (dcrc & (1 << 5)) ? ((orig_dat5 + 1) % 32) : orig_dat5;
cur_dat6 = (dcrc & (1 << 6)) ? ((orig_dat6 + 1) % 32) : orig_dat6;
cur_dat7 = (dcrc & (1 << 7)) ? ((orig_dat7 + 1) % 32) : orig_dat7;
cur_rxdly0 = (cur_dat0 << 24) | (cur_dat1 << 16) | (cur_dat2 << 8) | (cur_dat3 << 0);
cur_rxdly1 = (cur_dat4 << 24) | (cur_dat5 << 16) | (cur_dat6 << 8) | (cur_dat7 << 0);
writel(cur_rxdly0, host->base + MSDC_DAT_RDDLY0);
writel(cur_rxdly1, host->base + MSDC_DAT_RDDLY1);
} while (++rxdly < 32);
done:
return result;
}
static int msdc_tune_bwrite(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct msdc_host *host = mmc_priv(mmc);
u32 wrrdly, cur_wrrdly = 0xffffffff, orig_wrrdly;
u32 dsmpl, cur_dsmpl, orig_dsmpl;
u32 rxdly, cur_rxdly0;
u32 orig_dat0, orig_dat1, orig_dat2, orig_dat3;
u32 cur_dat0, cur_dat1, cur_dat2, cur_dat3;
int result = -1;
u32 skip = 1;
// MSDC_IOCON_DDR50CKD need to check. [Fix me]
sdr_get_field(host->base + MSDC_PAD_TUNE, MSDC_PAD_TUNE_DATWRDLY,
&orig_wrrdly);
sdr_get_field(host->base + MSDC_IOCON, MSDC_IOCON_DSPL, &orig_dsmpl);
/* Tune Method 2. just DAT0 */
sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_DDLSEL, 1);
cur_rxdly0 = readl(host->base + MSDC_DAT_RDDLY0);
/* E1 ECO. YD: Reverse */
if (readl(host->base + MSDC_ECO_VER) >= 4) {
orig_dat0 = (cur_rxdly0 >> 24) & 0x1F;
orig_dat1 = (cur_rxdly0 >> 16) & 0x1F;
orig_dat2 = (cur_rxdly0 >> 8) & 0x1F;
orig_dat3 = (cur_rxdly0 >> 0) & 0x1F;
} else {
orig_dat0 = (cur_rxdly0 >> 0) & 0x1F;
orig_dat1 = (cur_rxdly0 >> 8) & 0x1F;
orig_dat2 = (cur_rxdly0 >> 16) & 0x1F;
orig_dat3 = (cur_rxdly0 >> 24) & 0x1F;
}
rxdly = 0;
do {
wrrdly = 0;
do {
for (dsmpl = 0; dsmpl < 2; dsmpl++) {
cur_dsmpl = (orig_dsmpl + dsmpl) % 2;
if (skip == 1) {
skip = 0;
continue;
}
sdr_set_field(host->base + MSDC_IOCON,
MSDC_IOCON_DSPL, cur_dsmpl);
if (host->app_cmd) {
result = msdc_app_cmd(host->mmc, host);
if (result) {
dev_err(mmc_dev(host->mmc),
"%d -> TUNE_BWRITE app_cmd<%d> failed\n",
host->id,
host->mrq->cmd->opcode);
continue;
}
}
result = msdc_do_request(mmc, mrq);
dev_err(mmc_dev(host->mmc),
"%d -> TUNE_BWRITE<%s> DSPL<%d> DATWRDLY<%d> MSDC_DAT_RDDLY0<0x%x>\n",
host->id,
result == 0 ? "PASS" : "FAIL",
cur_dsmpl, cur_wrrdly, cur_rxdly0);
if (result == 0) {
goto done;
} else {
/* there is a case: command timeout, and data phase not processed */
if (mrq->data->error != -EIO) {
dev_err(mmc_dev(host->mmc),
"%d -> TUNE_READ: result<0x%x> cmd_error<%d> data_error<%d>\n",
host->id, result,
mrq->cmd->error,
mrq->data->error);
goto done;
}
}
}
cur_wrrdly = (orig_wrrdly + wrrdly + 1) % 32;
sdr_set_field(host->base + MSDC_PAD_TUNE,
MSDC_PAD_TUNE_DATWRDLY, cur_wrrdly);
} while (++wrrdly < 32);
cur_dat0 = (orig_dat0 + rxdly) % 32; /* only adjust bit-1 for crc */
cur_dat1 = orig_dat1;
cur_dat2 = orig_dat2;
cur_dat3 = orig_dat3;
cur_rxdly0 = (cur_dat0 << 24) | (cur_dat1 << 16) | (cur_dat2 << 8) | (cur_dat3 << 0);
writel(cur_rxdly0, host->base + MSDC_DAT_RDDLY0);
} while (++rxdly < 32);
done:
return result;
}
static int msdc_get_card_status(struct mmc_host *mmc, struct msdc_host *host, u32 *status)
{
struct mmc_command cmd;
struct mmc_request mrq;
u32 err;
memset(&cmd, 0, sizeof(struct mmc_command));
cmd.opcode = MMC_SEND_STATUS;
if (mmc->card) {
cmd.arg = mmc->card->rca << 16;
} else {
dev_err(mmc_dev(host->mmc), "%d -> cmd13 mmc card is null\n",
host->id);
cmd.arg = host->app_cmd_arg;
}
cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
memset(&mrq, 0, sizeof(struct mmc_request));
mrq.cmd = &cmd; cmd.mrq = &mrq;
cmd.data = NULL;
err = msdc_do_command(host, &cmd, 1, CMD_TIMEOUT);
if (status)
*status = cmd.resp[0];
return err;
}
static int msdc_check_busy(struct mmc_host *mmc, struct msdc_host *host)
{
u32 err = 0;
u32 status = 0;
do {
err = msdc_get_card_status(mmc, host, &status);
if (err)
return err;
/* need cmd12? */
dev_err(mmc_dev(host->mmc), "%d -> cmd<13> resp<0x%x>\n",
host->id, status);
} while (R1_CURRENT_STATE(status) == 7);
return err;
}
/* failed when msdc_do_request */
static int msdc_tune_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct msdc_host *host = mmc_priv(mmc);
struct mmc_data *data;
//u32 base = host->base;
int ret = 0, read;
data = mrq->cmd->data;
read = data->flags & MMC_DATA_READ ? 1 : 0;
if (read) {
if (data->error == -EIO)
ret = msdc_tune_bread(mmc, mrq);
} else {
ret = msdc_check_busy(mmc, host);
if (ret) {
dev_err(mmc_dev(host->mmc),
"%d -> XXX cmd13 wait program done failed\n",
host->id);
return ret;
}
/* CRC and TO */
/* Fix me: don't care card status? */
ret = msdc_tune_bwrite(mmc, mrq);
}
return ret;
}
/* ops.request */
static void msdc_ops_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct msdc_host *host = mmc_priv(mmc);
WARN_ON(host->mrq);
/* start to process */
spin_lock(&host->lock);
host->mrq = mrq;
if (msdc_do_request(mmc, mrq)) {
if (host->hw->flags & MSDC_REMOVABLE && ralink_soc == MT762X_SOC_MT7621AT && mrq->data && mrq->data->error)
msdc_tune_request(mmc, mrq);
}
/* ==== when request done, check if app_cmd ==== */
if (mrq->cmd->opcode == MMC_APP_CMD) {
host->app_cmd = 1;
host->app_cmd_arg = mrq->cmd->arg; /* save the RCA */
} else {
host->app_cmd = 0;
//host->app_cmd_arg = 0;
}
host->mrq = NULL;
spin_unlock(&host->lock);
mmc_request_done(mmc, mrq);
}
/* called by ops.set_ios */
static void msdc_set_buswidth(struct msdc_host *host, u32 width)
{
u32 val = readl(host->base + SDC_CFG);
val &= ~SDC_CFG_BUSWIDTH;
switch (width) {
default:
case MMC_BUS_WIDTH_1:
width = 1;
val |= (MSDC_BUS_1BITS << 16);
break;
case MMC_BUS_WIDTH_4:
val |= (MSDC_BUS_4BITS << 16);
break;
case MMC_BUS_WIDTH_8:
val |= (MSDC_BUS_8BITS << 16);
break;
}
writel(val, host->base + SDC_CFG);
}
/* ops.set_ios */
static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct msdc_host *host = mmc_priv(mmc);
u32 ddr = 0;
#ifdef MT6575_SD_DEBUG
static const char * const vdd[] = {
"1.50v", "1.55v", "1.60v", "1.65v", "1.70v", "1.80v", "1.90v",
"2.00v", "2.10v", "2.20v", "2.30v", "2.40v", "2.50v", "2.60v",
"2.70v", "2.80v", "2.90v", "3.00v", "3.10v", "3.20v", "3.30v",
"3.40v", "3.50v", "3.60v"
};
static const char * const power_mode[] = {
"OFF", "UP", "ON"
};
static const char * const bus_mode[] = {
"UNKNOWN", "OPENDRAIN", "PUSHPULL"
};
static const char * const timing[] = {
"LEGACY", "MMC_HS", "SD_HS"
};
printk("SET_IOS: CLK(%dkHz), BUS(%s), BW(%u), PWR(%s), VDD(%s), TIMING(%s)",
ios->clock / 1000, bus_mode[ios->bus_mode],
(ios->bus_width == MMC_BUS_WIDTH_4) ? 4 : 1,
power_mode[ios->power_mode], vdd[ios->vdd], timing[ios->timing]);
#endif
msdc_set_buswidth(host, ios->bus_width);
/* Power control ??? */
switch (ios->power_mode) {
case MMC_POWER_OFF:
case MMC_POWER_UP:
break;
case MMC_POWER_ON:
host->power_mode = MMC_POWER_ON;
break;
default:
break;
}
/* Clock control */
if (host->mclk != ios->clock) {
if (ios->clock > 25000000) {
//if (!(host->hw->flags & MSDC_REMOVABLE)) {
sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_RSPL,
MSDC_SMPL_FALLING);
sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_DSPL,
MSDC_SMPL_FALLING);
//} /* for tuning debug */
} else { /* default value */
writel(0x00000000, host->base + MSDC_IOCON);
// writel(0x00000000, host->base + MSDC_DAT_RDDLY0);
// for MT7620 E2 and afterward
writel(0x10101010, host->base + MSDC_DAT_RDDLY0);
writel(0x00000000, host->base + MSDC_DAT_RDDLY1);
// writel(0x00000000, host->base + MSDC_PAD_TUNE);
// for MT7620 E2 and afterward
writel(0x84101010, host->base + MSDC_PAD_TUNE);
}
msdc_set_mclk(host, ddr, ios->clock);
}
}
/* ops.get_ro */
static int msdc_ops_get_ro(struct mmc_host *mmc)
{
struct msdc_host *host = mmc_priv(mmc);
unsigned long flags;
int ro = 0;
if (host->hw->flags & MSDC_WP_PIN_EN) { /* set for card */
spin_lock_irqsave(&host->lock, flags);
ro = (readl(host->base + MSDC_PS) >> 31);
spin_unlock_irqrestore(&host->lock, flags);
}
return ro;
}
/* ops.get_cd */
static int msdc_ops_get_cd(struct mmc_host *mmc)
{
struct msdc_host *host = mmc_priv(mmc);
unsigned long flags;
int present = 1;
/* for sdio, MSDC_REMOVABLE not set, always return 1 */
if (!(host->hw->flags & MSDC_REMOVABLE)) {
/* For sdio, read H/W always get<1>, but may timeout some times */
#if 1
host->card_inserted = 1;
return 1;
#else
host->card_inserted = (host->pm_state.event == PM_EVENT_USER_RESUME) ? 1 : 0;
return host->card_inserted;
#endif
}
/* MSDC_CD_PIN_EN set for card */
if (host->hw->flags & MSDC_CD_PIN_EN) {
spin_lock_irqsave(&host->lock, flags);
// CD
present = readl(host->base + MSDC_PS) & MSDC_PS_CDSTS;
if (cd_active_low)
present = present ? 0 : 1;
else
present = present ? 1 : 0;
host->card_inserted = present;
spin_unlock_irqrestore(&host->lock, flags);
} else {
present = 0; /* TODO? Check DAT3 pins for card detection */
}
return present;
}
static struct mmc_host_ops mt_msdc_ops = {
.request = msdc_ops_request,
.set_ios = msdc_ops_set_ios,
.get_ro = msdc_ops_get_ro,
.get_cd = msdc_ops_get_cd,
};
/*--------------------------------------------------------------------------*/
/* interrupt handler */
/*--------------------------------------------------------------------------*/
static irqreturn_t msdc_irq(int irq, void *dev_id)
{
struct msdc_host *host = (struct msdc_host *)dev_id;
struct mmc_data *data = host->data;
struct mmc_command *cmd = host->cmd;
u32 cmdsts = MSDC_INT_RSPCRCERR | MSDC_INT_CMDTMO | MSDC_INT_CMDRDY |
MSDC_INT_ACMDCRCERR | MSDC_INT_ACMDTMO | MSDC_INT_ACMDRDY |
MSDC_INT_ACMD19_DONE;
u32 datsts = MSDC_INT_DATCRCERR | MSDC_INT_DATTMO;
u32 intsts = readl(host->base + MSDC_INT);
u32 inten = readl(host->base + MSDC_INTEN); inten &= intsts;
writel(intsts, host->base + MSDC_INT); /* clear interrupts */
/* MSG will cause fatal error */
/* card change interrupt */
if (intsts & MSDC_INT_CDSC) {
if (host->mmc->caps & MMC_CAP_NEEDS_POLL)
return IRQ_HANDLED;
schedule_delayed_work(&host->card_delaywork, HZ);
/* tuning when plug card ? */
}
/* transfer complete interrupt */
if (data) {
if (inten & MSDC_INT_XFER_COMPL) {
data->bytes_xfered = host->xfer_size;
complete(&host->xfer_done);
}
if (intsts & datsts) {
/* do basic reset, or stop command will sdc_busy */
msdc_reset_hw(host);
msdc_clr_fifo(host);
msdc_clr_int();
if (intsts & MSDC_INT_DATTMO)
data->error = -ETIMEDOUT;
else if (intsts & MSDC_INT_DATCRCERR)
data->error = -EIO;
//if(readl(MSDC_INTEN) & MSDC_INT_XFER_COMPL) {
complete(&host->xfer_done); /* Read CRC come fast, XFER_COMPL not enabled */
}
}
/* command interrupts */
if (cmd && (intsts & cmdsts)) {
if ((intsts & MSDC_INT_CMDRDY) || (intsts & MSDC_INT_ACMDRDY) ||
(intsts & MSDC_INT_ACMD19_DONE)) {
u32 *rsp = &cmd->resp[0];
switch (host->cmd_rsp) {
case RESP_NONE:
break;
case RESP_R2:
*rsp++ = readl(host->base + SDC_RESP3);
*rsp++ = readl(host->base + SDC_RESP2);
*rsp++ = readl(host->base + SDC_RESP1);
*rsp++ = readl(host->base + SDC_RESP0);
break;
default: /* Response types 1, 3, 4, 5, 6, 7(1b) */
if ((intsts & MSDC_INT_ACMDRDY) || (intsts & MSDC_INT_ACMD19_DONE))
*rsp = readl(host->base + SDC_ACMD_RESP);
else
*rsp = readl(host->base + SDC_RESP0);
break;
}
} else if ((intsts & MSDC_INT_RSPCRCERR) || (intsts & MSDC_INT_ACMDCRCERR)) {
cmd->error = -EIO;
} else if ((intsts & MSDC_INT_CMDTMO) || (intsts & MSDC_INT_ACMDTMO)) {
cmd->error = -ETIMEDOUT;
msdc_reset_hw(host);
msdc_clr_fifo(host);
msdc_clr_int();
}
complete(&host->cmd_done);
}
/* mmc irq interrupts */
if (intsts & MSDC_INT_MMCIRQ)
dev_info(mmc_dev(host->mmc), "msdc[%d] MMCIRQ: SDC_CSTS=0x%.8x\r\n",
host->id, readl(host->base + SDC_CSTS));
return IRQ_HANDLED;
}
/*--------------------------------------------------------------------------*/
/* platform_driver members */
/*--------------------------------------------------------------------------*/
/* called by msdc_drv_probe/remove */
static void msdc_enable_cd_irq(struct msdc_host *host, int enable)
{
struct msdc_hw *hw = host->hw;
/* for sdio, not set */
if ((hw->flags & MSDC_CD_PIN_EN) == 0) {
/* Pull down card detection pin since it is not available */
/*
* if (hw->config_gpio_pin)
* hw->config_gpio_pin(MSDC_CD_PIN, GPIO_PULL_DOWN);
*/
sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_CDSC);
sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP);
return;
}
if (enable) {
/* card detection circuit relies on the core power so that the core power
* shouldn't be turned off. Here adds a reference count to keep
* the core power alive.
*/
if (hw->config_gpio_pin) /* NULL */
hw->config_gpio_pin(MSDC_CD_PIN, GPIO_PULL_UP);
sdr_set_field(host->base + MSDC_PS, MSDC_PS_CDDEBOUNCE,
DEFAULT_DEBOUNCE);
sdr_set_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
sdr_set_bits(host->base + MSDC_INTEN, MSDC_INTEN_CDSC);
/* not in document! Fix me */
sdr_set_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP);
} else {
if (hw->config_gpio_pin) /* NULL */
hw->config_gpio_pin(MSDC_CD_PIN, GPIO_PULL_DOWN);
sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP);
sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_CDSC);
/* Here decreases a reference count to core power since card
* detection circuit is shutdown.
*/
}
}
/* called by msdc_drv_probe */
static void msdc_init_hw(struct msdc_host *host)
{
/* Configure to MMC/SD mode */
sdr_set_field(host->base + MSDC_CFG, MSDC_CFG_MODE, MSDC_SDMMC);
/* Reset */
msdc_reset_hw(host);
msdc_clr_fifo(host);
/* Disable card detection */
sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
/* Disable and clear all interrupts */
sdr_clr_bits(host->base + MSDC_INTEN, readl(host->base + MSDC_INTEN));
writel(readl(host->base + MSDC_INT), host->base + MSDC_INT);
#if 1
/* reset tuning parameter */
writel(0x00090000, host->base + MSDC_PAD_CTL0);
writel(0x000A0000, host->base + MSDC_PAD_CTL1);
writel(0x000A0000, host->base + MSDC_PAD_CTL2);
// writel( 0x00000000, host->base + MSDC_PAD_TUNE);
// for MT7620 E2 and afterward
writel(0x84101010, host->base + MSDC_PAD_TUNE);
// writel(0x00000000, host->base + MSDC_DAT_RDDLY0);
// for MT7620 E2 and afterward
writel(0x10101010, host->base + MSDC_DAT_RDDLY0);
writel(0x00000000, host->base + MSDC_DAT_RDDLY1);
writel(0x00000000, host->base + MSDC_IOCON);
if (readl(host->base + MSDC_ECO_VER) >= 4) {
if (host->id == 1) {
sdr_set_field(host->base + MSDC_PATCH_BIT1,
MSDC_PATCH_BIT1_WRDAT_CRCS, 1);
sdr_set_field(host->base + MSDC_PATCH_BIT1,
MSDC_PATCH_BIT1_CMD_RSP, 1);
/* internal clock: latch read data */
sdr_set_bits(host->base + MSDC_PATCH_BIT0,
MSDC_PATCH_BIT_CKGEN_CK);
}
}
#endif
/* for safety, should clear SDC_CFG.SDIO_INT_DET_EN & set SDC_CFG.SDIO in
* pre-loader,uboot,kernel drivers. and SDC_CFG.SDIO_INT_DET_EN will be only
* set when kernel driver wants to use SDIO bus interrupt
*/
/* Configure to enable SDIO mode. it's must otherwise sdio cmd5 failed */
sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIO);
/* disable detect SDIO device interrupt function */
sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
/* eneable SMT for glitch filter */
sdr_set_bits(host->base + MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKSMT);
sdr_set_bits(host->base + MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDSMT);
sdr_set_bits(host->base + MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATSMT);
#if 1
/* set clk, cmd, dat pad driving */
sdr_set_field(host->base + MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKDRVN, 4);
sdr_set_field(host->base + MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKDRVP, 4);
sdr_set_field(host->base + MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDDRVN, 4);
sdr_set_field(host->base + MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDDRVP, 4);
sdr_set_field(host->base + MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATDRVN, 4);
sdr_set_field(host->base + MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATDRVP, 4);
#else
sdr_set_field(host->base + MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKDRVN, 0);
sdr_set_field(host->base + MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKDRVP, 0);
sdr_set_field(host->base + MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDDRVN, 0);
sdr_set_field(host->base + MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDDRVP, 0);
sdr_set_field(host->base + MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATDRVN, 0);
sdr_set_field(host->base + MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATDRVP, 0);
#endif
/* set sampling edge */
/* write crc timeout detection */
sdr_set_field(host->base + MSDC_PATCH_BIT0, 1 << 30, 1);
/* Configure to default data timeout */
sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, DEFAULT_DTOC);
msdc_set_buswidth(host, MMC_BUS_WIDTH_1);
}
/* called by msdc_drv_remove */
static void msdc_deinit_hw(struct msdc_host *host)
{
/* Disable and clear all interrupts */
sdr_clr_bits(host->base + MSDC_INTEN, readl(host->base + MSDC_INTEN));
writel(readl(host->base + MSDC_INT), host->base + MSDC_INT);
/* Disable card detection */
msdc_enable_cd_irq(host, 0);
}
/* init gpd and bd list in msdc_drv_probe */
static void msdc_init_gpd_bd(struct msdc_host *host, struct msdc_dma *dma)
{
struct gpd *gpd = dma->gpd;
struct bd *bd = dma->bd;
int i;
/* we just support one gpd, but gpd->next must be set for desc
* DMA. That's why we alloc 2 gpd structurs.
*/
memset(gpd, 0, sizeof(struct gpd) * 2);
gpd->bdp = 1; /* hwo, cs, bd pointer */
gpd->ptr = (void *)dma->bd_addr; /* physical address */
gpd->next = (void *)((u32)dma->gpd_addr + sizeof(struct gpd));
memset(bd, 0, sizeof(struct bd) * MAX_BD_NUM);
for (i = 0; i < (MAX_BD_NUM - 1); i++)
bd[i].next = (void *)(dma->bd_addr + sizeof(*bd) * (i + 1));
}
static int msdc_drv_probe(struct platform_device *pdev)
{
struct resource *res;
__iomem void *base;
struct mmc_host *mmc;
struct msdc_host *host;
struct msdc_hw *hw;
int ret;
hw = &msdc0_hw;
if (of_property_read_bool(pdev->dev.of_node, "mtk,wp-en"))
msdc0_hw.flags |= MSDC_WP_PIN_EN;
/* Allocate MMC host for this device */
mmc = mmc_alloc_host(sizeof(struct msdc_host), &pdev->dev);
if (!mmc)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(base)) {
ret = PTR_ERR(base);
goto host_free;
}
/* Set host parameters to mmc */
mmc->ops = &mt_msdc_ops;
mmc->f_min = HOST_MIN_MCLK;
mmc->f_max = HOST_MAX_MCLK;
mmc->ocr_avail = MSDC_OCR_AVAIL;
mmc->caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED;
//TODO: read this as bus-width from dt (via mmc_of_parse)
mmc->caps |= MMC_CAP_4_BIT_DATA;
cd_active_low = !of_property_read_bool(pdev->dev.of_node, "mediatek,cd-high");
if (of_property_read_bool(pdev->dev.of_node, "mediatek,cd-poll"))
mmc->caps |= MMC_CAP_NEEDS_POLL;
/* MMC core transfer sizes tunable parameters */
mmc->max_segs = MAX_HW_SGMTS;
mmc->max_seg_size = MAX_SGMT_SZ;
mmc->max_blk_size = HOST_MAX_BLKSZ;
mmc->max_req_size = MAX_REQ_SZ;
mmc->max_blk_count = mmc->max_req_size;
host = mmc_priv(mmc);
host->hw = hw;
host->mmc = mmc;
host->id = pdev->id;
if (host->id < 0 || host->id >= 4)
host->id = 0;
host->error = 0;
host->irq = platform_get_irq(pdev, 0);
if (host->irq < 0) {
ret = -EINVAL;
goto host_free;
}
host->base = base;
host->mclk = 0; /* mclk: the request clock of mmc sub-system */
host->hclk = hclks[hw->clk_src]; /* hclk: clock of clock source to msdc controller */
host->sclk = 0; /* sclk: the really clock after divition */
host->pm_state = PMSG_RESUME;
host->suspend = 0;
host->core_clkon = 0;
host->card_clkon = 0;
host->core_power = 0;
host->power_mode = MMC_POWER_OFF;
// host->card_inserted = hw->flags & MSDC_REMOVABLE ? 0 : 1;
host->timeout_ns = 0;
host->timeout_clks = DEFAULT_DTOC * 65536;
host->mrq = NULL;
//init_MUTEX(&host->sem); /* we don't need to support multiple threads access */
dma_coerce_mask_and_coherent(mmc_dev(mmc), DMA_BIT_MASK(32));
/* using dma_alloc_coherent*/ /* todo: using 1, for all 4 slots */
host->dma.gpd = dma_alloc_coherent(&pdev->dev,
MAX_GPD_NUM * sizeof(struct gpd),
&host->dma.gpd_addr, GFP_KERNEL);
host->dma.bd = dma_alloc_coherent(&pdev->dev,
MAX_BD_NUM * sizeof(struct bd),
&host->dma.bd_addr, GFP_KERNEL);
if (!host->dma.gpd || !host->dma.bd) {
ret = -ENOMEM;
goto release_mem;
}
msdc_init_gpd_bd(host, &host->dma);
INIT_DELAYED_WORK(&host->card_delaywork, msdc_tasklet_card);
spin_lock_init(&host->lock);
msdc_init_hw(host);
/* TODO check weather flags 0 is correct, the mtk-sd driver uses
* IRQF_TRIGGER_LOW | IRQF_ONESHOT for flags
*
* for flags 0 the trigger polarity is determined by the
* device tree, but not the oneshot flag, but maybe it is also
* not needed because the soc could be oneshot safe.
*/
ret = devm_request_irq(&pdev->dev, host->irq, msdc_irq, 0, pdev->name,
host);
if (ret)
goto release;
platform_set_drvdata(pdev, mmc);
ret = mmc_add_host(mmc);
if (ret)
goto release;
/* Config card detection pin and enable interrupts */
if (hw->flags & MSDC_CD_PIN_EN) { /* set for card */
msdc_enable_cd_irq(host, 1);
} else {
msdc_enable_cd_irq(host, 0);
}
return 0;
release:
platform_set_drvdata(pdev, NULL);
msdc_deinit_hw(host);
cancel_delayed_work_sync(&host->card_delaywork);
release_mem:
if (host->dma.gpd)
dma_free_coherent(&pdev->dev, MAX_GPD_NUM * sizeof(struct gpd),
host->dma.gpd, host->dma.gpd_addr);
if (host->dma.bd)
dma_free_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct bd),
host->dma.bd, host->dma.bd_addr);
host_free:
mmc_free_host(mmc);
return ret;
}
/* 4 device share one driver, using "drvdata" to show difference */
static int msdc_drv_remove(struct platform_device *pdev)
{
struct mmc_host *mmc;
struct msdc_host *host;
mmc = platform_get_drvdata(pdev);
BUG_ON(!mmc);
host = mmc_priv(mmc);
BUG_ON(!host);
dev_err(mmc_dev(host->mmc), "%d -> removed !!!\n",
host->id);
platform_set_drvdata(pdev, NULL);
mmc_remove_host(host->mmc);
msdc_deinit_hw(host);
cancel_delayed_work_sync(&host->card_delaywork);
dma_free_coherent(&pdev->dev, MAX_GPD_NUM * sizeof(struct gpd),
host->dma.gpd, host->dma.gpd_addr);
dma_free_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct bd),
host->dma.bd, host->dma.bd_addr);
mmc_free_host(host->mmc);
return 0;
}
/* Fix me: Power Flow */
#ifdef CONFIG_PM
static void msdc_drv_pm(struct platform_device *pdev, pm_message_t state)
{
struct mmc_host *mmc = platform_get_drvdata(pdev);
if (mmc) {
struct msdc_host *host = mmc_priv(mmc);
msdc_pm(state, (void *)host);
}
}
static int msdc_drv_suspend(struct platform_device *pdev, pm_message_t state)
{
if (state.event == PM_EVENT_SUSPEND)
msdc_drv_pm(pdev, state);
return 0;
}
static int msdc_drv_resume(struct platform_device *pdev)
{
struct pm_message state;
state.event = PM_EVENT_RESUME;
msdc_drv_pm(pdev, state);
return 0;
}
#endif
static const struct of_device_id mt7620_sdhci_match[] = {
{ .compatible = "ralink,mt7620-sdhci" },
{},
};
MODULE_DEVICE_TABLE(of, mt7620_sdhci_match);
static struct platform_driver mt_msdc_driver = {
.probe = msdc_drv_probe,
.remove = msdc_drv_remove,
#ifdef CONFIG_PM
.suspend = msdc_drv_suspend,
.resume = msdc_drv_resume,
#endif
.driver = {
.name = DRV_NAME,
.of_match_table = mt7620_sdhci_match,
},
};
/*--------------------------------------------------------------------------*/
/* module init/exit */
/*--------------------------------------------------------------------------*/
static int __init mt_msdc_init(void)
{
int ret;
u32 reg;
// Set the pins for sdxc to sdxc mode
//FIXME: this should be done by pinctl and not by the sd driver
reg = readl((void __iomem *)(RALINK_SYSCTL_BASE + 0x60)) & ~(0x3 << 18);
writel(reg, (void __iomem *)(RALINK_SYSCTL_BASE + 0x60));
ret = platform_driver_register(&mt_msdc_driver);
if (ret) {
pr_err("%s: Can't register driver", DRV_NAME);
return ret;
}
#if defined(MT6575_SD_DEBUG)
msdc_debug_proc_init();
#endif
return 0;
}
static void __exit mt_msdc_exit(void)
{
platform_driver_unregister(&mt_msdc_driver);
}
module_init(mt_msdc_init);
module_exit(mt_msdc_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("MediaTek MT6575 SD/MMC Card Driver");
MODULE_AUTHOR("Infinity Chen <infinity.chen@mediatek.com>");