OpenWrt – Rev 3
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/* 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/moduleparam.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/ioport.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/blkdev.h>
#include <linux/slab.h>
#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
#include <linux/mmc/core.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/sd.h>
#include <linux/mmc/sdio.h>
#include <linux/dma-mapping.h>
/* +++ by chhung */
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/version.h>
#include <linux/pm.h>
#include <linux/of.h>
#define MSDC_SMPL_FALLING (1)
#define MSDC_CD_PIN_EN (1 << 0) /* card detection pin is wired */
#define MSDC_WP_PIN_EN (1 << 1) /* write protection pin is wired */
#define MSDC_REMOVABLE (1 << 5) /* removable slot */
#define MSDC_SYS_SUSPEND (1 << 6) /* suspended by system */
#define MSDC_HIGHSPEED (1 << 7)
//#define IRQ_SDC 14 //MT7620 /*FIXME*/
#ifdef CONFIG_SOC_MT7621
#define RALINK_SYSCTL_BASE 0xbe000000
#define RALINK_MSDC_BASE 0xbe130000
#else
#define RALINK_SYSCTL_BASE 0xb0000000
#define RALINK_MSDC_BASE 0xb0130000
#endif
#define IRQ_SDC 22 /*FIXME*/
#include <asm/dma.h>
/* end of +++ */
#include <asm/mach-ralink/ralink_regs.h>
#if 0 /* --- by chhung */
#include <mach/board.h>
#include <mach/mt6575_devs.h>
#include <mach/mt6575_typedefs.h>
#include <mach/mt6575_clock_manager.h>
#include <mach/mt6575_pm_ldo.h>
//#include <mach/mt6575_pll.h>
//#include <mach/mt6575_gpio.h>
//#include <mach/mt6575_gpt_sw.h>
#include <asm/tcm.h>
// #include <mach/mt6575_gpt.h>
#endif /* end of --- */
#include "mt6575_sd.h"
#include "dbg.h"
/* +++ by chhung */
#include "board.h"
/* end of +++ */
#if 0 /* --- by chhung */
#define isb() __asm__ __volatile__ ("" : : : "memory")
#define dsb() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 4" \
: : "r" (0) : "memory")
#define dmb() __asm__ __volatile__ ("" : : : "memory")
#endif /* end of --- */
#define DRV_NAME "mtk-sd"
#define HOST_MAX_NUM (1) /* +/- by chhung */
#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)
#if 0 /* --- by chhung */
#define MSDC_CLKSRC_REG (0xf100000C)
#define PDN_REG (0xF1000010)
#endif /* end of --- */
#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_BD_PER_GPD (MAX_BD_NUM)
#define MAX_HW_SGMTS (MAX_BD_NUM)
#define MAX_PHY_SGMTS (MAX_BD_NUM)
#define MAX_SGMT_SZ (MAX_DMA_CNT)
#define MAX_REQ_SZ (MAX_SGMT_SZ * 8)
static int mtk_sw_poll;
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)
#if 0 /* --- by chhung */
/* gate means clock power down */
static int g_clk_gate = 0;
#define msdc_gate_clock(id) \
do { \
g_clk_gate &= ~(1 << ((id) + PERI_MSDC0_PDN)); \
} while(0)
/* not like power down register. 1 means clock on. */
#define msdc_ungate_clock(id) \
do { \
g_clk_gate |= 1 << ((id) + PERI_MSDC0_PDN); \
} while(0)
// do we need sync object or not
void msdc_clk_status(int * status)
{
*status = g_clk_gate;
}
#endif /* end of --- */
/* +++ by chhung */
struct msdc_hw msdc0_hw = {
.clk_src = 0,
.cmd_edge = MSDC_SMPL_FALLING,
.data_edge = MSDC_SMPL_FALLING,
.clk_drv = 4,
.cmd_drv = 4,
.dat_drv = 4,
.data_pins = 4,
.data_offset = 0,
.flags = MSDC_SYS_SUSPEND | MSDC_CD_PIN_EN | MSDC_REMOVABLE | MSDC_HIGHSPEED,
// .flags = MSDC_SYS_SUSPEND | MSDC_WP_PIN_EN | MSDC_CD_PIN_EN | MSDC_REMOVABLE,
};
static struct resource mtk_sd_resources[] = {
[0] = {
.start = RALINK_MSDC_BASE,
.end = RALINK_MSDC_BASE+0x3fff,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_SDC, /*FIXME*/
.end = IRQ_SDC, /*FIXME*/
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device mtk_sd_device = {
.name = "mtk-sd",
.id = 0,
.num_resources = ARRAY_SIZE(mtk_sd_resources),
.resource = mtk_sd_resources,
};
/* 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 */
};
/* For Inhanced DMA */
#define msdc_init_gpd_ex(gpd,extlen,cmd,arg,blknum) \
do { \
((gpd_t*)gpd)->extlen = extlen; \
((gpd_t*)gpd)->cmd = cmd; \
((gpd_t*)gpd)->arg = arg; \
((gpd_t*)gpd)->blknum = blknum; \
}while(0)
#define msdc_init_bd(bd, blkpad, dwpad, dptr, dlen) \
do { \
BUG_ON(dlen > 0xFFFFUL); \
((bd_t*)bd)->blkpad = blkpad; \
((bd_t*)bd)->dwpad = dwpad; \
((bd_t*)bd)->ptr = (void*)dptr; \
((bd_t*)bd)->buflen = dlen; \
}while(0)
#define msdc_txfifocnt() ((sdr_read32(MSDC_FIFOCS) & MSDC_FIFOCS_TXCNT) >> 16)
#define msdc_rxfifocnt() ((sdr_read32(MSDC_FIFOCS) & MSDC_FIFOCS_RXCNT) >> 0)
#define msdc_fifo_write32(v) sdr_write32(MSDC_TXDATA, (v))
#define msdc_fifo_write8(v) sdr_write8(MSDC_TXDATA, (v))
#define msdc_fifo_read32() sdr_read32(MSDC_RXDATA)
#define msdc_fifo_read8() sdr_read8(MSDC_RXDATA)
#define msdc_dma_on() sdr_clr_bits(MSDC_CFG, MSDC_CFG_PIO)
#define msdc_dma_off() sdr_set_bits(MSDC_CFG, MSDC_CFG_PIO)
#define msdc_retry(expr,retry,cnt) \
do { \
int backup = cnt; \
while (retry) { \
if (!(expr)) break; \
if (cnt-- == 0) { \
retry--; mdelay(1); cnt = backup; \
} \
} \
WARN_ON(retry == 0); \
} while(0)
#if 0 /* --- by chhung */
#define msdc_reset() \
do { \
int retry = 3, cnt = 1000; \
sdr_set_bits(MSDC_CFG, MSDC_CFG_RST); \
dsb(); \
msdc_retry(sdr_read32(MSDC_CFG) & MSDC_CFG_RST, retry, cnt); \
} while(0)
#else
#define msdc_reset() \
do { \
int retry = 3, cnt = 1000; \
sdr_set_bits(MSDC_CFG, MSDC_CFG_RST); \
msdc_retry(sdr_read32(MSDC_CFG) & MSDC_CFG_RST, retry, cnt); \
} while(0)
#endif /* end of +/- */
#define msdc_clr_int() \
do { \
volatile u32 val = sdr_read32(MSDC_INT); \
sdr_write32(MSDC_INT, val); \
} while(0)
#define msdc_clr_fifo() \
do { \
int retry = 3, cnt = 1000; \
sdr_set_bits(MSDC_FIFOCS, MSDC_FIFOCS_CLR); \
msdc_retry(sdr_read32(MSDC_FIFOCS) & MSDC_FIFOCS_CLR, retry, cnt); \
} while(0)
#define msdc_irq_save(val) \
do { \
val = sdr_read32(MSDC_INTEN); \
sdr_clr_bits(MSDC_INTEN, val); \
} while(0)
#define msdc_irq_restore(val) \
do { \
sdr_set_bits(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
//============================================
// the power for msdc host controller: global
// always keep the VMC on.
//============================================
#define msdc_vcore_on(host) \
do { \
INIT_MSG("[+]VMC ref. count<%d>", ++host->pwr_ref); \
(void)hwPowerOn(MT65XX_POWER_LDO_VMC, VOL_3300, "SD"); \
} while (0)
#define msdc_vcore_off(host) \
do { \
INIT_MSG("[-]VMC ref. count<%d>", --host->pwr_ref); \
(void)hwPowerDown(MT65XX_POWER_LDO_VMC, "SD"); \
} while (0)
//====================================
// the vdd output for card: global
// always keep the VMCH on.
//====================================
#define msdc_vdd_on(host) \
do { \
(void)hwPowerOn(MT65XX_POWER_LDO_VMCH, VOL_3300, "SD"); \
} while (0)
#define msdc_vdd_off(host) \
do { \
(void)hwPowerDown(MT65XX_POWER_LDO_VMCH, "SD"); \
} while (0)
#define sdc_is_busy() (sdr_read32(SDC_STS) & SDC_STS_SDCBUSY)
#define sdc_is_cmd_busy() (sdr_read32(SDC_STS) & SDC_STS_CMDBUSY)
#define sdc_send_cmd(cmd,arg) \
do { \
sdr_write32(SDC_ARG, (arg)); \
sdr_write32(SDC_CMD, (cmd)); \
} while(0)
// can modify to read h/w register.
//#define is_card_present(h) ((sdr_read32(MSDC_PS) & MSDC_PS_CDSTS) ? 0 : 1);
#define is_card_present(h) (((struct msdc_host*)(h))->card_inserted)
/* +++ 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);
#ifdef MT6575_SD_DEBUG
static void msdc_dump_card_status(struct msdc_host *host, u32 status)
{
static char *state[] = {
"Idle", /* 0 */
"Ready", /* 1 */
"Ident", /* 2 */
"Stby", /* 3 */
"Tran", /* 4 */
"Data", /* 5 */
"Rcv", /* 6 */
"Prg", /* 7 */
"Dis", /* 8 */
"Reserved", /* 9 */
"Reserved", /* 10 */
"Reserved", /* 11 */
"Reserved", /* 12 */
"Reserved", /* 13 */
"Reserved", /* 14 */
"I/O mode", /* 15 */
};
if (status & R1_OUT_OF_RANGE)
N_MSG(RSP, "[CARD_STATUS] Out of Range");
if (status & R1_ADDRESS_ERROR)
N_MSG(RSP, "[CARD_STATUS] Address Error");
if (status & R1_BLOCK_LEN_ERROR)
N_MSG(RSP, "[CARD_STATUS] Block Len Error");
if (status & R1_ERASE_SEQ_ERROR)
N_MSG(RSP, "[CARD_STATUS] Erase Seq Error");
if (status & R1_ERASE_PARAM)
N_MSG(RSP, "[CARD_STATUS] Erase Param");
if (status & R1_WP_VIOLATION)
N_MSG(RSP, "[CARD_STATUS] WP Violation");
if (status & R1_CARD_IS_LOCKED)
N_MSG(RSP, "[CARD_STATUS] Card is Locked");
if (status & R1_LOCK_UNLOCK_FAILED)
N_MSG(RSP, "[CARD_STATUS] Lock/Unlock Failed");
if (status & R1_COM_CRC_ERROR)
N_MSG(RSP, "[CARD_STATUS] Command CRC Error");
if (status & R1_ILLEGAL_COMMAND)
N_MSG(RSP, "[CARD_STATUS] Illegal Command");
if (status & R1_CARD_ECC_FAILED)
N_MSG(RSP, "[CARD_STATUS] Card ECC Failed");
if (status & R1_CC_ERROR)
N_MSG(RSP, "[CARD_STATUS] CC Error");
if (status & R1_ERROR)
N_MSG(RSP, "[CARD_STATUS] Error");
if (status & R1_UNDERRUN)
N_MSG(RSP, "[CARD_STATUS] Underrun");
if (status & R1_OVERRUN)
N_MSG(RSP, "[CARD_STATUS] Overrun");
if (status & R1_CID_CSD_OVERWRITE)
N_MSG(RSP, "[CARD_STATUS] CID/CSD Overwrite");
if (status & R1_WP_ERASE_SKIP)
N_MSG(RSP, "[CARD_STATUS] WP Eraser Skip");
if (status & R1_CARD_ECC_DISABLED)
N_MSG(RSP, "[CARD_STATUS] Card ECC Disabled");
if (status & R1_ERASE_RESET)
N_MSG(RSP, "[CARD_STATUS] Erase Reset");
if (status & R1_READY_FOR_DATA)
N_MSG(RSP, "[CARD_STATUS] Ready for Data");
if (status & R1_SWITCH_ERROR)
N_MSG(RSP, "[CARD_STATUS] Switch error");
if (status & R1_APP_CMD)
N_MSG(RSP, "[CARD_STATUS] App Command");
N_MSG(RSP, "[CARD_STATUS] '%s' State", state[R1_CURRENT_STATE(status)]);
}
static void msdc_dump_ocr_reg(struct msdc_host *host, u32 resp)
{
if (resp & (1 << 7))
N_MSG(RSP, "[OCR] Low Voltage Range");
if (resp & (1 << 15))
N_MSG(RSP, "[OCR] 2.7-2.8 volt");
if (resp & (1 << 16))
N_MSG(RSP, "[OCR] 2.8-2.9 volt");
if (resp & (1 << 17))
N_MSG(RSP, "[OCR] 2.9-3.0 volt");
if (resp & (1 << 18))
N_MSG(RSP, "[OCR] 3.0-3.1 volt");
if (resp & (1 << 19))
N_MSG(RSP, "[OCR] 3.1-3.2 volt");
if (resp & (1 << 20))
N_MSG(RSP, "[OCR] 3.2-3.3 volt");
if (resp & (1 << 21))
N_MSG(RSP, "[OCR] 3.3-3.4 volt");
if (resp & (1 << 22))
N_MSG(RSP, "[OCR] 3.4-3.5 volt");
if (resp & (1 << 23))
N_MSG(RSP, "[OCR] 3.5-3.6 volt");
if (resp & (1 << 24))
N_MSG(RSP, "[OCR] Switching to 1.8V Accepted (S18A)");
if (resp & (1 << 30))
N_MSG(RSP, "[OCR] Card Capacity Status (CCS)");
if (resp & (1 << 31))
N_MSG(RSP, "[OCR] Card Power Up Status (Idle)");
else
N_MSG(RSP, "[OCR] Card Power Up Status (Busy)");
}
static void msdc_dump_rca_resp(struct msdc_host *host, u32 resp)
{
u32 status = (((resp >> 15) & 0x1) << 23) |
(((resp >> 14) & 0x1) << 22) |
(((resp >> 13) & 0x1) << 19) |
(resp & 0x1fff);
N_MSG(RSP, "[RCA] 0x%.4x", resp >> 16);
msdc_dump_card_status(host, status);
}
static void msdc_dump_io_resp(struct msdc_host *host, u32 resp)
{
u32 flags = (resp >> 8) & 0xFF;
char *state[] = {"DIS", "CMD", "TRN", "RFU"};
if (flags & (1 << 7))
N_MSG(RSP, "[IO] COM_CRC_ERR");
if (flags & (1 << 6))
N_MSG(RSP, "[IO] Illgal command");
if (flags & (1 << 3))
N_MSG(RSP, "[IO] Error");
if (flags & (1 << 2))
N_MSG(RSP, "[IO] RFU");
if (flags & (1 << 1))
N_MSG(RSP, "[IO] Function number error");
if (flags & (1 << 0))
N_MSG(RSP, "[IO] Out of range");
N_MSG(RSP, "[IO] State: %s, Data:0x%x", state[(resp >> 12) & 0x3], resp & 0xFF);
}
#endif
static void msdc_set_timeout(struct msdc_host *host, u32 ns, u32 clks)
{
u32 base = host->base;
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(SDC_CFG, SDC_CFG_DTOC, timeout);
N_MSG(OPS, "Set read data timeout: %dns %dclks -> %d x 65536 cycles",
ns, clks, timeout + 1);
}
/* msdc_eirq_sdio() will be called when EIRQ(for WIFI) */
static void msdc_eirq_sdio(void *data)
{
struct msdc_host *host = (struct msdc_host *)data;
N_MSG(INT, "SDIO EINT");
mmc_signal_sdio_irq(host->mmc);
}
/* msdc_eirq_cd will not be used! We not using EINT for card detection. */
static void msdc_eirq_cd(void *data)
{
struct msdc_host *host = (struct msdc_host *)data;
N_MSG(INT, "CD EINT");
#if 0
tasklet_hi_schedule(&host->card_tasklet);
#else
schedule_delayed_work(&host->card_delaywork, HZ);
#endif
}
#if 0
static void msdc_tasklet_card(unsigned long arg)
{
struct msdc_host *host = (struct msdc_host *)arg;
#else
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);
#endif
struct msdc_hw *hw = host->hw;
u32 base = host->base;
u32 inserted;
u32 status = 0;
//u32 change = 0;
spin_lock(&host->lock);
if (hw->get_cd_status) { // NULL
inserted = hw->get_cd_status();
} else {
status = sdr_read32(MSDC_PS);
if (cd_active_low)
inserted = (status & MSDC_PS_CDSTS) ? 0 : 1;
else
inserted = (status & MSDC_PS_CDSTS) ? 1 : 0;
}
if (host->mmc->caps & MMC_CAP_NEEDS_POLL)
inserted = 1;
#if 0
change = host->card_inserted ^ inserted;
host->card_inserted = inserted;
if (change && !host->suspend) {
if (inserted) {
host->mmc->f_max = HOST_MAX_MCLK; // work around
}
mmc_detect_change(host->mmc, msecs_to_jiffies(20));
}
#else /* 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));
}
IRQ_MSG("card found<%s>", inserted ? "inserted" : "removed");
#endif
spin_unlock(&host->lock);
}
#if 0 /* --- by chhung */
/* For E2 only */
static u8 clk_src_bit[4] = {
0, 3, 5, 7
};
static void msdc_select_clksrc(struct msdc_host* host, unsigned char clksrc)
{
u32 val;
u32 base = host->base;
BUG_ON(clksrc > 3);
INIT_MSG("set clock source to <%d>", clksrc);
val = sdr_read32(MSDC_CLKSRC_REG);
if (sdr_read32(MSDC_ECO_VER) >= 4) {
val &= ~(0x3 << clk_src_bit[host->id]);
val |= clksrc << clk_src_bit[host->id];
} else {
val &= ~0x3; val |= clksrc;
}
sdr_write32(MSDC_CLKSRC_REG, val);
host->hclk = hclks[clksrc];
host->hw->clk_src = clksrc;
}
#endif /* end of --- */
static void msdc_set_mclk(struct msdc_host *host, int ddr, unsigned int hz)
{
//struct msdc_hw *hw = host->hw;
u32 base = host->base;
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 ?
//ERR_MSG("set mclk to 0!!!");
msdc_reset();
return;
}
msdc_irq_save(flags);
#if defined (CONFIG_MT7621_FPGA) || defined (CONFIG_MT7628_FPGA)
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;
}
#else
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;
}
}
#endif
/* set clock mode and divisor */
sdr_set_field(MSDC_CFG, MSDC_CFG_CKMOD, mode);
sdr_set_field(MSDC_CFG, MSDC_CFG_CKDIV, div);
/* wait clock stable */
while (!(sdr_read32(MSDC_CFG) & MSDC_CFG_CKSTB));
host->sclk = sclk;
host->mclk = hz;
msdc_set_timeout(host, host->timeout_ns, host->timeout_clks); // need?
INIT_MSG("================");
INIT_MSG("!!! Set<%dKHz> Source<%dKHz> -> sclk<%dKHz>", hz/1000, hclk/1000, sclk/1000);
INIT_MSG("================");
msdc_irq_restore(flags);
}
/* Fix me. when need to abort */
static void msdc_abort_data(struct msdc_host *host)
{
u32 base = host->base;
struct mmc_command *stop = host->mrq->stop;
ERR_MSG("Need to Abort. dma<%d>", host->dma_xfer);
msdc_reset();
msdc_clr_fifo();
msdc_clr_int();
// need to check FIFO count 0 ?
if (stop) { /* try to stop, but may not success */
ERR_MSG("stop when abort CMD<%d>", stop->opcode);
(void)msdc_do_command(host, stop, 0, CMD_TIMEOUT);
}
//if (host->mclk >= 25000000) {
// msdc_set_mclk(host, 0, host->mclk >> 1);
//}
}
#if 0 /* --- by chhung */
static void msdc_pin_config(struct msdc_host *host, int mode)
{
struct msdc_hw *hw = host->hw;
u32 base = host->base;
int pull = (mode == MSDC_PIN_PULL_UP) ? GPIO_PULL_UP : GPIO_PULL_DOWN;
/* Config WP pin */
if (hw->flags & MSDC_WP_PIN_EN) {
if (hw->config_gpio_pin) /* NULL */
hw->config_gpio_pin(MSDC_WP_PIN, pull);
}
switch (mode) {
case MSDC_PIN_PULL_UP:
//sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKPU, 1); /* Check & FIXME */
//sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKPD, 0); /* Check & FIXME */
sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDPU, 1);
sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDPD, 0);
sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATPU, 1);
sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATPD, 0);
break;
case MSDC_PIN_PULL_DOWN:
//sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKPU, 0); /* Check & FIXME */
//sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKPD, 1); /* Check & FIXME */
sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDPU, 0);
sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDPD, 1);
sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATPU, 0);
sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATPD, 1);
break;
case MSDC_PIN_PULL_NONE:
default:
//sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKPU, 0); /* Check & FIXME */
//sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKPD, 0); /* Check & FIXME */
sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDPU, 0);
sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDPD, 0);
sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATPU, 0);
sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATPD, 0);
break;
}
N_MSG(CFG, "Pins mode(%d), down(%d), up(%d)",
mode, MSDC_PIN_PULL_DOWN, MSDC_PIN_PULL_UP);
}
void msdc_pin_reset(struct msdc_host *host, int mode)
{
struct msdc_hw *hw = (struct msdc_hw *)host->hw;
u32 base = host->base;
int pull = (mode == MSDC_PIN_PULL_UP) ? GPIO_PULL_UP : GPIO_PULL_DOWN;
/* Config reset pin */
if (hw->flags & MSDC_RST_PIN_EN) {
if (hw->config_gpio_pin) /* NULL */
hw->config_gpio_pin(MSDC_RST_PIN, pull);
if (mode == MSDC_PIN_PULL_UP) {
sdr_clr_bits(EMMC_IOCON, EMMC_IOCON_BOOTRST);
} else {
sdr_set_bits(EMMC_IOCON, EMMC_IOCON_BOOTRST);
}
}
}
static void msdc_core_power(struct msdc_host *host, int on)
{
N_MSG(CFG, "Turn %s %s power (copower: %d -> %d)",
on ? "on" : "off", "core", host->core_power, on);
if (on && host->core_power == 0) {
msdc_vcore_on(host);
host->core_power = 1;
msleep(1);
} else if (!on && host->core_power == 1) {
msdc_vcore_off(host);
host->core_power = 0;
msleep(1);
}
}
static void msdc_host_power(struct msdc_host *host, int on)
{
N_MSG(CFG, "Turn %s %s power ", on ? "on" : "off", "host");
if (on) {
//msdc_core_power(host, 1); // need do card detection.
msdc_pin_reset(host, MSDC_PIN_PULL_UP);
} else {
msdc_pin_reset(host, MSDC_PIN_PULL_DOWN);
//msdc_core_power(host, 0);
}
}
static void msdc_card_power(struct msdc_host *host, int on)
{
N_MSG(CFG, "Turn %s %s power ", on ? "on" : "off", "card");
if (on) {
msdc_pin_config(host, MSDC_PIN_PULL_UP);
if (host->hw->ext_power_on) {
host->hw->ext_power_on();
} else {
//msdc_vdd_on(host); // need todo card detection.
}
msleep(1);
} else {
if (host->hw->ext_power_off) {
host->hw->ext_power_off();
} else {
//msdc_vdd_off(host);
}
msdc_pin_config(host, MSDC_PIN_PULL_DOWN);
msleep(1);
}
}
static void msdc_set_power_mode(struct msdc_host *host, u8 mode)
{
N_MSG(CFG, "Set power mode(%d)", mode);
if (host->power_mode == MMC_POWER_OFF && mode != MMC_POWER_OFF) {
msdc_host_power(host, 1);
msdc_card_power(host, 1);
} else if (host->power_mode != MMC_POWER_OFF && mode == MMC_POWER_OFF) {
msdc_card_power(host, 0);
msdc_host_power(host, 0);
}
host->power_mode = mode;
}
#endif /* end of --- */
#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_USER_RESUME || evt == PM_EVENT_USER_SUSPEND) {
INIT_MSG("USR_%s: suspend<%d> power<%d>",
evt == PM_EVENT_USER_RESUME ? "EVENT_USER_RESUME" : "EVENT_USER_SUSPEND",
host->suspend, host->power_mode);
}
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 */
INIT_MSG("%s Suspend", evt == PM_EVENT_SUSPEND ? "PM" : "USR");
if(host->hw->flags & MSDC_SYS_SUSPEND) /* set for card */
(void)mmc_suspend_host(host->mmc);
else {
// host->mmc->pm_flags |= MMC_PM_IGNORE_PM_NOTIFY; /* just for double confirm */ /* --- by chhung */
mmc_remove_host(host->mmc);
}
} else if (evt == PM_EVENT_RESUME || evt == PM_EVENT_USER_RESUME) {
if (!host->suspend){
//ERR_MSG("warning: already resume");
return;
}
/* No PM resume when USR suspend */
if (evt == PM_EVENT_RESUME && host->pm_state.event == PM_EVENT_USER_SUSPEND) {
ERR_MSG("PM Resume when in USR Suspend"); /* won't happen. */
return;
}
host->suspend = 0;
host->pm_state = state;
INIT_MSG("%s Resume", evt == PM_EVENT_RESUME ? "PM" : "USR");
if(host->hw->flags & MSDC_SYS_SUSPEND) { /* will not set for WIFI */
(void)mmc_resume_host(host->mmc);
}
else {
// host->mmc->pm_flags |= MMC_PM_IGNORE_PM_NOTIFY; /* --- by chhung */
mmc_add_host(host->mmc);
}
}
}
#endif
/*--------------------------------------------------------------------------*/
/* mmc_host_ops members */
/*--------------------------------------------------------------------------*/
static unsigned int msdc_command_start(struct msdc_host *host,
struct mmc_command *cmd,
int tune, /* not used */
unsigned long timeout)
{
u32 base = host->base;
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!
*/
if (opcode == MMC_SEND_OP_COND || opcode == SD_APP_OP_COND)
resp = RESP_R3;
else if (opcode == MMC_SET_RELATIVE_ADDR || opcode == SD_SEND_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;
}
}
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);
}
N_MSG(CMD, "CMD<%d><0x%.8x> Arg<0x%.8x>", opcode , rawcmd, cmd->arg);
tmo = jiffies + timeout;
if (opcode == MMC_SEND_STATUS) {
for (;;) {
if (!sdc_is_cmd_busy())
break;
if (time_after(jiffies, tmo)) {
ERR_MSG("XXX cmd_busy timeout: before CMD<%d>", opcode);
cmd->error = (unsigned int)-ETIMEDOUT;
msdc_reset();
goto end;
}
}
}else {
for (;;) {
if (!sdc_is_busy())
break;
if (time_after(jiffies, tmo)) {
ERR_MSG("XXX sdc_busy timeout: before CMD<%d>", opcode);
cmd->error = (unsigned int)-ETIMEDOUT;
msdc_reset();
goto end;
}
}
}
//BUG_ON(in_interrupt());
host->cmd = cmd;
host->cmd_rsp = resp;
init_completion(&host->cmd_done);
sdr_set_bits(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)
{
u32 base = host->base;
u32 opcode = cmd->opcode;
//u32 rawcmd;
u32 resp;
u32 wints = MSDC_INT_CMDRDY | MSDC_INT_RSPCRCERR | MSDC_INT_CMDTMO |
MSDC_INT_ACMDRDY | MSDC_INT_ACMDCRCERR | MSDC_INT_ACMDTMO |
MSDC_INT_ACMD19_DONE;
resp = host->cmd_rsp;
BUG_ON(in_interrupt());
//init_completion(&host->cmd_done);
//sdr_set_bits(MSDC_INTEN, wints);
spin_unlock(&host->lock);
if(!wait_for_completion_timeout(&host->cmd_done, 10*timeout)){
ERR_MSG("XXX CMD<%d> wait_for_completion timeout ARG<0x%.8x>", opcode, cmd->arg);
cmd->error = (unsigned int)-ETIMEDOUT;
msdc_reset();
}
spin_lock(&host->lock);
sdr_clr_bits(MSDC_INTEN, wints);
host->cmd = NULL;
//end:
#ifdef MT6575_SD_DEBUG
switch (resp) {
case RESP_NONE:
N_MSG(RSP, "CMD_RSP(%d): %d RSP(%d)", opcode, cmd->error, resp);
break;
case RESP_R2:
N_MSG(RSP, "CMD_RSP(%d): %d RSP(%d)= %.8x %.8x %.8x %.8x",
opcode, cmd->error, resp, cmd->resp[0], cmd->resp[1],
cmd->resp[2], cmd->resp[3]);
break;
default: /* Response types 1, 3, 4, 5, 6, 7(1b) */
N_MSG(RSP, "CMD_RSP(%d): %d RSP(%d)= 0x%.8x",
opcode, cmd->error, resp, cmd->resp[0]);
if (cmd->error == 0) {
switch (resp) {
case RESP_R1:
case RESP_R1B:
msdc_dump_card_status(host, cmd->resp[0]);
break;
case RESP_R3:
msdc_dump_ocr_reg(host, cmd->resp[0]);
break;
case RESP_R5:
msdc_dump_io_resp(host, cmd->resp[0]);
break;
case RESP_R6:
msdc_dump_rca_resp(host, cmd->resp[0]);
break;
}
}
break;
}
#endif
/* 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 == (unsigned int)(-EIO) ) {
if (sdr_read32(SDC_CMD) & 0x1800) { /* check if has data phase */
msdc_abort_data(host);
} else {
/* do basic: reset*/
msdc_reset();
msdc_clr_fifo();
msdc_clr_int();
}
cmd->error = msdc_tune_cmdrsp(host,cmd);
}
// check DAT0
/* if (resp == RESP_R1B) {
while ((sdr_read32(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, tune, timeout))
goto end;
if (msdc_command_resp(host, cmd, tune, timeout))
goto end;
end:
N_MSG(CMD, " return<%d> resp<0x%.8x>", cmd->error, cmd->resp[0]);
return cmd->error;
}
/* The abort condition when PIO read/write
tmo:
*/
static int msdc_pio_abort(struct msdc_host *host, struct mmc_data *data, unsigned long tmo)
{
int ret = 0;
u32 base = host->base;
if (atomic_read(&host->abort)) {
ret = 1;
}
if (time_after(jiffies, tmo)) {
data->error = (unsigned int)-ETIMEDOUT;
ERR_MSG("XXX PIO Data Timeout: CMD<%d>", host->mrq->cmd->opcode);
ret = 1;
}
if(ret) {
msdc_reset();
msdc_clr_fifo();
msdc_clr_int();
ERR_MSG("msdc pio find abort");
}
return ret;
}
/*
Need to add a timeout, or WDT timeout, system reboot.
*/
// pio mode data read/write
static int msdc_pio_read(struct msdc_host *host, struct mmc_data *data)
{
struct scatterlist *sg = data->sg;
u32 base = host->base;
u32 num = data->sg_len;
u32 *ptr;
u8 *u8ptr;
u32 left = 0;
u32 count, size = 0;
u32 wints = MSDC_INTEN_DATTMO | MSDC_INTEN_DATCRCERR ;
unsigned long tmo = jiffies + DAT_TIMEOUT;
sdr_set_bits(MSDC_INTEN, wints);
while (num) {
left = sg_dma_len(sg);
ptr = sg_virt(sg);
while (left) {
if ((left >= MSDC_FIFO_THD) && (msdc_rxfifocnt() >= MSDC_FIFO_THD)) {
count = MSDC_FIFO_THD >> 2;
do {
*ptr++ = msdc_fifo_read32();
} while (--count);
left -= MSDC_FIFO_THD;
} else if ((left < MSDC_FIFO_THD) && msdc_rxfifocnt() >= left) {
while (left > 3) {
*ptr++ = msdc_fifo_read32();
left -= 4;
}
u8ptr = (u8 *)ptr;
while(left) {
* u8ptr++ = msdc_fifo_read8();
left--;
}
}
if (msdc_pio_abort(host, data, tmo)) {
goto end;
}
}
size += sg_dma_len(sg);
sg = sg_next(sg); num--;
}
end:
data->bytes_xfered += size;
N_MSG(FIO, " PIO Read<%d>bytes", size);
sdr_clr_bits(MSDC_INTEN, wints);
if(data->error) ERR_MSG("read pio data->error<%d> left<%d> size<%d>", data->error, left, size);
return data->error;
}
/* please make sure won't using PIO when size >= 512
which means, memory card block read/write won't using pio
then don't need to handle the CMD12 when data error.
*/
static int msdc_pio_write(struct msdc_host* host, struct mmc_data *data)
{
u32 base = host->base;
struct scatterlist *sg = data->sg;
u32 num = data->sg_len;
u32 *ptr;
u8 *u8ptr;
u32 left;
u32 count, size = 0;
u32 wints = MSDC_INTEN_DATTMO | MSDC_INTEN_DATCRCERR ;
unsigned long tmo = jiffies + DAT_TIMEOUT;
sdr_set_bits(MSDC_INTEN, wints);
while (num) {
left = sg_dma_len(sg);
ptr = sg_virt(sg);
while (left) {
if (left >= MSDC_FIFO_SZ && msdc_txfifocnt() == 0) {
count = MSDC_FIFO_SZ >> 2;
do {
msdc_fifo_write32(*ptr); ptr++;
} while (--count);
left -= MSDC_FIFO_SZ;
} else if (left < MSDC_FIFO_SZ && msdc_txfifocnt() == 0) {
while (left > 3) {
msdc_fifo_write32(*ptr); ptr++;
left -= 4;
}
u8ptr = (u8*)ptr;
while(left){
msdc_fifo_write8(*u8ptr); u8ptr++;
left--;
}
}
if (msdc_pio_abort(host, data, tmo)) {
goto end;
}
}
size += sg_dma_len(sg);
sg = sg_next(sg); num--;
}
end:
data->bytes_xfered += size;
N_MSG(FIO, " PIO Write<%d>bytes", size);
if(data->error) ERR_MSG("write pio data->error<%d>", data->error);
sdr_clr_bits(MSDC_INTEN, wints);
return data->error;
}
#if 0 /* --- by chhung */
// DMA resume / start / stop
static void msdc_dma_resume(struct msdc_host *host)
{
u32 base = host->base;
sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_RESUME, 1);
N_MSG(DMA, "DMA resume");
}
#endif /* end of --- */
static void msdc_dma_start(struct msdc_host *host)
{
u32 base = host->base;
u32 wints = MSDC_INTEN_XFER_COMPL | MSDC_INTEN_DATTMO | MSDC_INTEN_DATCRCERR ;
sdr_set_bits(MSDC_INTEN, wints);
//dsb(); /* --- by chhung */
sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_START, 1);
N_MSG(DMA, "DMA start");
}
static void msdc_dma_stop(struct msdc_host *host)
{
u32 base = host->base;
//u32 retries=500;
u32 wints = MSDC_INTEN_XFER_COMPL | MSDC_INTEN_DATTMO | MSDC_INTEN_DATCRCERR ;
N_MSG(DMA, "DMA status: 0x%.8x",sdr_read32(MSDC_DMA_CFG));
//while (sdr_read32(MSDC_DMA_CFG) & MSDC_DMA_CFG_STS);
sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_STOP, 1);
while (sdr_read32(MSDC_DMA_CFG) & MSDC_DMA_CFG_STS);
//dsb(); /* --- by chhung */
sdr_clr_bits(MSDC_INTEN, wints); /* Not just xfer_comp */
N_MSG(DMA, "DMA stop");
}
#if 0 /* --- by chhung */
/* dump a gpd list */
static void msdc_dma_dump(struct msdc_host *host, struct msdc_dma *dma)
{
gpd_t *gpd = dma->gpd;
bd_t *bd = dma->bd;
bd_t *ptr;
int i = 0;
int p_to_v;
if (dma->mode != MSDC_MODE_DMA_DESC) {
return;
}
ERR_MSG("try to dump gpd and bd");
/* dump gpd */
ERR_MSG(".gpd<0x%.8x> gpd_phy<0x%.8x>", (int)gpd, (int)dma->gpd_addr);
ERR_MSG("...hwo <%d>", gpd->hwo );
ERR_MSG("...bdp <%d>", gpd->bdp );
ERR_MSG("...chksum<0x%.8x>", gpd->chksum );
//ERR_MSG("...intr <0x%.8x>", gpd->intr );
ERR_MSG("...next <0x%.8x>", (int)gpd->next );
ERR_MSG("...ptr <0x%.8x>", (int)gpd->ptr );
ERR_MSG("...buflen<0x%.8x>", gpd->buflen );
//ERR_MSG("...extlen<0x%.8x>", gpd->extlen );
//ERR_MSG("...arg <0x%.8x>", gpd->arg );
//ERR_MSG("...blknum<0x%.8x>", gpd->blknum );
//ERR_MSG("...cmd <0x%.8x>", gpd->cmd );
/* dump bd */
ERR_MSG(".bd<0x%.8x> bd_phy<0x%.8x> gpd_ptr<0x%.8x>", (int)bd, (int)dma->bd_addr, (int)gpd->ptr);
ptr = bd;
p_to_v = ((u32)bd - (u32)dma->bd_addr);
while (1) {
ERR_MSG(".bd[%d]", i); i++;
ERR_MSG("...eol <%d>", ptr->eol );
ERR_MSG("...chksum<0x%.8x>", ptr->chksum );
//ERR_MSG("...blkpad<0x%.8x>", ptr->blkpad );
//ERR_MSG("...dwpad <0x%.8x>", ptr->dwpad );
ERR_MSG("...next <0x%.8x>", (int)ptr->next );
ERR_MSG("...ptr <0x%.8x>", (int)ptr->ptr );
ERR_MSG("...buflen<0x%.8x>", (int)ptr->buflen );
if (ptr->eol == 1) {
break;
}
/* find the next bd, virtual address of ptr->next */
/* don't need to enable when use malloc */
//BUG_ON( (ptr->next + p_to_v)!=(ptr+1) );
//ERR_MSG(".next bd<0x%.8x><0x%.8x>", (ptr->next + p_to_v), (ptr+1));
ptr++;
}
ERR_MSG("dump gpd and bd finished");
}
#endif /* end of --- */
/* 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;
}
/* gpd bd setup + dma registers */
static int msdc_dma_config(struct msdc_host *host, struct msdc_dma *dma)
{
u32 base = host->base;
u32 sglen = dma->sglen;
//u32 i, j, num, bdlen, arg, xfersz;
u32 j, num, bdlen;
u8 blkpad, dwpad, chksum;
struct scatterlist *sg = dma->sg;
gpd_t *gpd;
bd_t *bd;
switch (dma->mode) {
case MSDC_MODE_DMA_BASIC:
BUG_ON(dma->xfersz > 65535);
BUG_ON(dma->sglen != 1);
sdr_write32(MSDC_DMA_SA, PHYSADDR(sg_dma_address(sg)));
sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_LASTBUF, 1);
//#if defined (CONFIG_RALINK_MT7620)
if (ralink_soc == MT762X_SOC_MT7620A)
sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_XFERSZ, sg_dma_len(sg));
//#elif defined (CONFIG_RALINK_MT7621) || defined (CONFIG_RALINK_MT7628)
else
sdr_write32((volatile u32*)(RALINK_MSDC_BASE+0xa8), sg_dma_len(sg));
//#endif
sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_BRUSTSZ, dma->burstsz);
sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_MODE, 0);
break;
case MSDC_MODE_DMA_DESC:
blkpad = (dma->flags & DMA_FLAG_PAD_BLOCK) ? 1 : 0;
dwpad = (dma->flags & DMA_FLAG_PAD_DWORD) ? 1 : 0;
chksum = (dma->flags & DMA_FLAG_EN_CHKSUM) ? 1 : 0;
/* calculate the required number of gpd */
num = (sglen + MAX_BD_PER_GPD - 1) / MAX_BD_PER_GPD;
BUG_ON(num !=1 );
gpd = dma->gpd;
bd = dma->bd;
bdlen = sglen;
/* modify gpd*/
//gpd->intr = 0;
gpd->hwo = 1; /* hw will clear it */
gpd->bdp = 1;
gpd->chksum = 0; /* need to clear first. */
gpd->chksum = (chksum ? msdc_dma_calcs((u8 *)gpd, 16) : 0);
/* modify bd*/
for (j = 0; j < bdlen; j++) {
msdc_init_bd(&bd[j], blkpad, dwpad, sg_dma_address(sg), sg_dma_len(sg));
if(j == bdlen - 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 = (chksum ? msdc_dma_calcs((u8 *)(&bd[j]), 16) : 0);
sg++;
}
dma->used_gpd += 2;
dma->used_bd += bdlen;
sdr_set_field(MSDC_DMA_CFG, MSDC_DMA_CFG_DECSEN, chksum);
sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_BRUSTSZ, dma->burstsz);
sdr_set_field(MSDC_DMA_CTRL, MSDC_DMA_CTRL_MODE, 1);
sdr_write32(MSDC_DMA_SA, PHYSADDR((u32)dma->gpd_addr));
break;
default:
break;
}
N_MSG(DMA, "DMA_CTRL = 0x%x", sdr_read32(MSDC_DMA_CTRL));
N_MSG(DMA, "DMA_CFG = 0x%x", sdr_read32(MSDC_DMA_CFG));
N_MSG(DMA, "DMA_SA = 0x%x", sdr_read32(MSDC_DMA_SA));
return 0;
}
static void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma,
struct scatterlist *sg, unsigned int sglen)
{
BUG_ON(sglen > MAX_BD_NUM); /* not support currently */
dma->sg = sg;
dma->flags = DMA_FLAG_EN_CHKSUM;
//dma->flags = DMA_FLAG_NONE; /* CHECKME */
dma->sglen = sglen;
dma->xfersz = host->xfer_size;
dma->burstsz = MSDC_BRUST_64B;
if (sglen == 1 && sg_dma_len(sg) <= MAX_DMA_CNT)
dma->mode = MSDC_MODE_DMA_BASIC;
else
dma->mode = MSDC_MODE_DMA_DESC;
N_MSG(DMA, "DMA mode<%d> sglen<%d> xfersz<%d>", dma->mode, dma->sglen, dma->xfersz);
msdc_dma_config(host, dma);
/*if (dma->mode == MSDC_MODE_DMA_DESC) {
//msdc_dma_dump(host, dma);
} */
}
/* set block number before send command */
static void msdc_set_blknum(struct msdc_host *host, u32 blknum)
{
u32 base = host->base;
sdr_write32(SDC_BLK_NUM, blknum);
}
static int msdc_do_request(struct mmc_host*mmc, struct mmc_request*mrq)
{
struct msdc_host *host = mmc_priv(mmc);
struct mmc_command *cmd;
struct mmc_data *data;
u32 base = host->base;
//u32 intsts = 0;
unsigned int left=0;
int dma = 0, read = 1, dir = DMA_FROM_DEVICE, send_type=0;
#define SND_DAT 0
#define SND_CMD 1
BUG_ON(mmc == NULL);
BUG_ON(mrq == NULL);
host->error = 0;
atomic_set(&host->abort, 0);
cmd = mrq->cmd;
data = mrq->cmd->data;
#if 0 /* --- by chhung */
//if(host->id ==1){
N_MSG(OPS, "enable clock!");
msdc_ungate_clock(host->id);
//}
#endif /* end of --- */
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;
/* deside the transfer mode */
if (drv_mode[host->id] == MODE_PIO) {
host->dma_xfer = dma = 0;
} else if (drv_mode[host->id] == MODE_DMA) {
host->dma_xfer = dma = 1;
} else if (drv_mode[host->id] == MODE_SIZE_DEP) {
host->dma_xfer = dma = ((host->xfer_size >= dma_size[host->id]) ? 1 : 0);
}
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);
}
}
msdc_set_blknum(host, data->blocks);
//msdc_clr_fifo(); /* no need */
if (dma) {
msdc_dma_on(); /* enable DMA mode first!! */
init_completion(&host->xfer_done);
/* start the command first*/
if (msdc_command_start(host, cmd, 1, CMD_TIMEOUT) != 0)
goto done;
dir = read ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
(void)dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len, dir);
msdc_dma_setup(host, &host->dma, data->sg, data->sg_len);
/* 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)){
ERR_MSG("XXX CMD<%d> wait xfer_done<%d> timeout!!", cmd->opcode, data->blocks * data->blksz);
ERR_MSG(" DMA_SA = 0x%x", sdr_read32(MSDC_DMA_SA));
ERR_MSG(" DMA_CA = 0x%x", sdr_read32(MSDC_DMA_CA));
ERR_MSG(" DMA_CTRL = 0x%x", sdr_read32(MSDC_DMA_CTRL));
ERR_MSG(" DMA_CFG = 0x%x", sdr_read32(MSDC_DMA_CFG));
data->error = (unsigned int)-ETIMEDOUT;
msdc_reset();
msdc_clr_fifo();
msdc_clr_int();
}
spin_lock(&host->lock);
msdc_dma_stop(host);
} else {
/* Firstly: send command */
if (msdc_do_command(host, cmd, 1, CMD_TIMEOUT) != 0) {
goto done;
}
/* Secondly: pio data phase */
if (read) {
if (msdc_pio_read(host, data)){
goto done;
}
} else {
if (msdc_pio_write(host, data)) {
goto done;
}
}
/* For write case: make sure contents in fifo flushed to device */
if (!read) {
while (1) {
left=msdc_txfifocnt();
if (left == 0) {
break;
}
if (msdc_pio_abort(host, data, jiffies + DAT_TIMEOUT)) {
break;
/* Fix me: what about if data error, when stop ? how to? */
}
}
} else {
/* Fix me: read case: need to check CRC error */
}
/* For write case: SDCBUSY and Xfer_Comp will assert when DAT0 not busy.
For read case : SDCBUSY and Xfer_Comp will assert when last byte read out from FIFO.
*/
/* try not to wait xfer_comp interrupt.
the next command will check SDC_BUSY.
SDC_BUSY means xfer_comp assert
*/
} // PIO mode
/* Last: stop transfer */
if (data->stop){
if (msdc_do_command(host, data->stop, 0, CMD_TIMEOUT) != 0) {
goto done;
}
}
}
done:
if (data != NULL) {
host->data = NULL;
host->dma_xfer = 0;
if (dma != 0) {
msdc_dma_off();
host->dma.used_bd = 0;
host->dma.used_gpd = 0;
dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len, dir);
}
host->blksz = 0;
#if 0 // don't stop twice!
if(host->hw->flags & MSDC_REMOVABLE && data->error) {
msdc_abort_data(host);
/* reset in IRQ, stop command has issued. -> No need */
}
#endif
N_MSG(OPS, "CMD<%d> data<%s %s> blksz<%d> block<%d> error<%d>",cmd->opcode, (dma? "dma":"pio"),
(read ? "read ":"write") ,data->blksz, data->blocks, data->error);
}
#if 0 /* --- by chhung */
#if 1
//if(host->id==1) {
if(send_type==SND_CMD) {
if(cmd->opcode == MMC_SEND_STATUS) {
if((cmd->resp[0] & CARD_READY_FOR_DATA) ||(CARD_CURRENT_STATE(cmd->resp[0]) != 7)){
N_MSG(OPS,"disable clock, CMD13 IDLE");
msdc_gate_clock(host->id);
}
} else {
N_MSG(OPS,"disable clock, CMD<%d>", cmd->opcode);
msdc_gate_clock(host->id);
}
} else {
if(read) {
N_MSG(OPS,"disable clock!!! Read CMD<%d>",cmd->opcode);
msdc_gate_clock(host->id);
}
}
//}
#else
msdc_gate_clock(host->id);
#endif
#endif /* end of --- */
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;
//if (host->error) ERR_MSG("host->error<%d>", host->error);
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;
#if 0 /* bug: we meet mmc->card is null when ACMD6 */
cmd.arg = mmc->card->rca << 16;
#else
cmd.arg = host->app_cmd_arg;
#endif
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 base = host->base;
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(MSDC_IOCON, MSDC_IOCON_RSPL, orig_rsmpl);
sdr_get_field(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(MSDC_IOCON, MSDC_IOCON_RSPL, cur_rsmpl);
if (host->app_cmd) {
result = msdc_app_cmd(host->mmc, host);
if (result) {
ERR_MSG("TUNE_CMD app_cmd<%d> failed: RESP_RXDLY<%d>,R_SMPL<%d>",
host->mrq->cmd->opcode, cur_rrdly, cur_rsmpl);
continue;
}
}
result = msdc_do_command(host, cmd, 0, CMD_TIMEOUT); // not tune.
ERR_MSG("TUNE_CMD<%d> %s PAD_CMD_RESP_RXDLY[26:22]<%d> R_SMPL[1]<%d>", cmd->opcode,
(result == 0) ? "PASS" : "FAIL", cur_rrdly, cur_rsmpl);
if (result == 0) {
return 0;
}
if (result != (unsigned int)(-EIO)) {
ERR_MSG("TUNE_CMD<%d> Error<%d> not -EIO", cmd->opcode, result);
return result;
}
/* should be EIO */
if (sdr_read32(SDC_CMD) & 0x1800) { /* check if has data phase */
msdc_abort_data(host);
}
}
/* Lv2: PAD_CMD_RESP_RXDLY[26:22] */
cur_rrdly = (orig_rrdly + rrdly + 1) % 32;
sdr_set_field(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 base = host->base;
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(MSDC_IOCON, MSDC_IOCON_DSPL, orig_dsmpl);
/* Tune Method 2. */
sdr_set_field(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(MSDC_IOCON, MSDC_IOCON_DSPL, cur_dsmpl);
if (host->app_cmd) {
result = msdc_app_cmd(host->mmc, host);
if (result) {
ERR_MSG("TUNE_BREAD app_cmd<%d> failed", host->mrq->cmd->opcode);
continue;
}
}
result = msdc_do_request(mmc,mrq);
sdr_get_field(SDC_DCRC_STS, SDC_DCRC_STS_POS|SDC_DCRC_STS_NEG, dcrc); /* RO */
if (!ddr) dcrc &= ~SDC_DCRC_STS_NEG;
ERR_MSG("TUNE_BREAD<%s> dcrc<0x%x> DATRDDLY0/1<0x%x><0x%x> dsmpl<0x%x>",
(result == 0 && dcrc == 0) ? "PASS" : "FAIL", dcrc,
sdr_read32(MSDC_DAT_RDDLY0), sdr_read32(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 != (unsigned int)(-EIO)) {
ERR_MSG("TUNE_READ: result<0x%x> cmd_error<%d> data_error<%d>",
result, mrq->cmd->error, mrq->data->error);
goto done;
}
}
}
cur_rxdly0 = sdr_read32(MSDC_DAT_RDDLY0);
cur_rxdly1 = sdr_read32(MSDC_DAT_RDDLY1);
/* E1 ECO. YD: Reverse */
if (sdr_read32(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);
sdr_write32(MSDC_DAT_RDDLY0, cur_rxdly0);
sdr_write32(MSDC_DAT_RDDLY1, cur_rxdly1);
} 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 base = host->base;
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(MSDC_PAD_TUNE, MSDC_PAD_TUNE_DATWRDLY, orig_wrrdly);
sdr_get_field(MSDC_IOCON, MSDC_IOCON_DSPL, orig_dsmpl );
/* Tune Method 2. just DAT0 */
sdr_set_field(MSDC_IOCON, MSDC_IOCON_DDLSEL, 1);
cur_rxdly0 = sdr_read32(MSDC_DAT_RDDLY0);
/* E1 ECO. YD: Reverse */
if (sdr_read32(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(MSDC_IOCON, MSDC_IOCON_DSPL, cur_dsmpl);
if (host->app_cmd) {
result = msdc_app_cmd(host->mmc, host);
if (result) {
ERR_MSG("TUNE_BWRITE app_cmd<%d> failed", host->mrq->cmd->opcode);
continue;
}
}
result = msdc_do_request(mmc,mrq);
ERR_MSG("TUNE_BWRITE<%s> DSPL<%d> DATWRDLY<%d> MSDC_DAT_RDDLY0<0x%x>",
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 != (unsigned int)(-EIO)) {
ERR_MSG("TUNE_READ: result<0x%x> cmd_error<%d> data_error<%d>",
result, mrq->cmd->error, mrq->data->error);
goto done;
}
}
}
cur_wrrdly = (orig_wrrdly + wrrdly + 1) % 32;
sdr_set_field(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);
sdr_write32(MSDC_DAT_RDDLY0, cur_rxdly0);
} 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 {
ERR_MSG("cmd13 mmc card is null");
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? */
ERR_MSG("cmd<13> resp<0x%x>", 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_command *cmd;
struct mmc_data *data;
//u32 base = host->base;
int ret=0, read;
cmd = mrq->cmd;
data = mrq->cmd->data;
read = data->flags & MMC_DATA_READ ? 1 : 0;
if (read) {
if (data->error == (unsigned int)(-EIO)) {
ret = msdc_tune_bread(mmc,mrq);
}
} else {
ret = msdc_check_busy(mmc, host);
if (ret){
ERR_MSG("XXX cmd13 wait program done failed");
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);
//=== for sdio profile ===
#if 0 /* --- by chhung */
u32 old_H32, old_L32, new_H32, new_L32;
u32 ticks = 0, opcode = 0, sizes = 0, bRx = 0;
#endif /* end of --- */
if(host->mrq){
ERR_MSG("XXX host->mrq<0x%.8x>", (int)host->mrq);
BUG();
}
if (!is_card_present(host) || host->power_mode == MMC_POWER_OFF) {
ERR_MSG("cmd<%d> card<%d> power<%d>", mrq->cmd->opcode, is_card_present(host), host->power_mode);
mrq->cmd->error = (unsigned int)-ENOMEDIUM;
#if 1
mrq->done(mrq); // call done directly.
#else
mrq->cmd->retries = 0; // please don't retry.
mmc_request_done(mmc, mrq);
#endif
return;
}
/* start to process */
spin_lock(&host->lock);
#if 0 /* --- by chhung */
if (sdio_pro_enable) { //=== for sdio profile ===
if (mrq->cmd->opcode == 52 || mrq->cmd->opcode == 53) {
GPT_GetCounter64(&old_L32, &old_H32);
}
}
#endif /* end of --- */
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;
#if 0 /* --- by chhung */
//=== for sdio profile ===
if (sdio_pro_enable) {
if (mrq->cmd->opcode == 52 || mrq->cmd->opcode == 53) {
GPT_GetCounter64(&new_L32, &new_H32);
ticks = msdc_time_calc(old_L32, old_H32, new_L32, new_H32);
opcode = mrq->cmd->opcode;
if (mrq->cmd->data) {
sizes = mrq->cmd->data->blocks * mrq->cmd->data->blksz;
bRx = mrq->cmd->data->flags & MMC_DATA_READ ? 1 : 0 ;
} else {
bRx = mrq->cmd->arg & 0x80000000 ? 1 : 0;
}
if (!mrq->cmd->error) {
msdc_performance(opcode, sizes, bRx, ticks);
}
}
}
#endif /* end of --- */
spin_unlock(&host->lock);
mmc_request_done(mmc, mrq);
return;
}
/* called by ops.set_ios */
static void msdc_set_buswidth(struct msdc_host *host, u32 width)
{
u32 base = host->base;
u32 val = sdr_read32(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;
}
sdr_write32(SDC_CFG, val);
N_MSG(CFG, "Bus Width = %d", width);
}
/* ops.set_ios */
static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct msdc_host *host = mmc_priv(mmc);
struct msdc_hw *hw=host->hw;
u32 base = host->base;
u32 ddr = 0;
#ifdef MT6575_SD_DEBUG
static char *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 char *power_mode[] = {
"OFF", "UP", "ON"
};
static char *bus_mode[] = {
"UNKNOWN", "OPENDRAIN", "PUSHPULL"
};
static char *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:
// msdc_set_power_mode(host, ios->power_mode); /* --- by chhung */
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)) {
INIT_MSG("SD data latch edge<%d>", hw->data_edge);
sdr_set_field(MSDC_IOCON, MSDC_IOCON_RSPL, hw->cmd_edge);
sdr_set_field(MSDC_IOCON, MSDC_IOCON_DSPL, hw->data_edge);
//} /* for tuning debug */
} else { /* default value */
sdr_write32(MSDC_IOCON, 0x00000000);
// sdr_write32(MSDC_DAT_RDDLY0, 0x00000000);
sdr_write32(MSDC_DAT_RDDLY0, 0x10101010); // for MT7620 E2 and afterward
sdr_write32(MSDC_DAT_RDDLY1, 0x00000000);
// sdr_write32(MSDC_PAD_TUNE, 0x00000000);
sdr_write32(MSDC_PAD_TUNE, 0x84101010); // for MT7620 E2 and afterward
}
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);
u32 base = host->base;
unsigned long flags;
int ro = 0;
if (host->hw->flags & MSDC_WP_PIN_EN) { /* set for card */
spin_lock_irqsave(&host->lock, flags);
ro = (sdr_read32(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);
u32 base = host->base;
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;
INIT_MSG("sdio ops_get_cd<%d>", host->card_inserted);
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);
#if 0
present = host->card_inserted; /* why not read from H/W: Fix me*/
#else
// CD
if (cd_active_low)
present = (sdr_read32(MSDC_PS) & MSDC_PS_CDSTS) ? 0 : 1;
else
present = (sdr_read32(MSDC_PS) & MSDC_PS_CDSTS) ? 1 : 0;
if (host->mmc->caps & MMC_CAP_NEEDS_POLL)
present = 1;
host->card_inserted = present;
#endif
spin_unlock_irqrestore(&host->lock, flags);
} else {
present = 0; /* TODO? Check DAT3 pins for card detection */
}
INIT_MSG("ops_get_cd return<%d>", present);
return present;
}
/* ops.enable_sdio_irq */
static void msdc_ops_enable_sdio_irq(struct mmc_host *mmc, int enable)
{
struct msdc_host *host = mmc_priv(mmc);
struct msdc_hw *hw = host->hw;
u32 base = host->base;
u32 tmp;
if (hw->flags & MSDC_EXT_SDIO_IRQ) { /* yes for sdio */
if (enable) {
hw->enable_sdio_eirq(); /* combo_sdio_enable_eirq */
} else {
hw->disable_sdio_eirq(); /* combo_sdio_disable_eirq */
}
} else {
ERR_MSG("XXX "); /* so never enter here */
tmp = sdr_read32(SDC_CFG);
/* FIXME. Need to interrupt gap detection */
if (enable) {
tmp |= (SDC_CFG_SDIOIDE | SDC_CFG_SDIOINTWKUP);
} else {
tmp &= ~(SDC_CFG_SDIOIDE | SDC_CFG_SDIOINTWKUP);
}
sdr_write32(SDC_CFG, tmp);
}
}
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,
.enable_sdio_irq = msdc_ops_enable_sdio_irq,
};
/*--------------------------------------------------------------------------*/
/* 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 base = host->base;
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 = sdr_read32(MSDC_INT);
u32 inten = sdr_read32(MSDC_INTEN); inten &= intsts;
sdr_write32(MSDC_INT, intsts); /* clear interrupts */
/* MSG will cause fatal error */
/* card change interrupt */
if (intsts & MSDC_INT_CDSC){
if (mtk_sw_poll)
return IRQ_HANDLED;
IRQ_MSG("MSDC_INT_CDSC irq<0x%.8x>", intsts);
#if 0 /* ---/+++ by chhung: fix slot mechanical bounce issue */
tasklet_hi_schedule(&host->card_tasklet);
#else
schedule_delayed_work(&host->card_delaywork, HZ);
#endif
/* tuning when plug card ? */
}
/* sdio interrupt */
if (intsts & MSDC_INT_SDIOIRQ){
IRQ_MSG("XXX MSDC_INT_SDIOIRQ"); /* seems not sdio irq */
//mmc_signal_sdio_irq(host->mmc);
}
/* transfer complete interrupt */
if (data != NULL) {
if (inten & MSDC_INT_XFER_COMPL) {
data->bytes_xfered = host->dma.xfersz;
complete(&host->xfer_done);
}
if (intsts & datsts) {
/* do basic reset, or stop command will sdc_busy */
msdc_reset();
msdc_clr_fifo();
msdc_clr_int();
atomic_set(&host->abort, 1); /* For PIO mode exit */
if (intsts & MSDC_INT_DATTMO){
IRQ_MSG("XXX CMD<%d> MSDC_INT_DATTMO", host->mrq->cmd->opcode);
data->error = (unsigned int)-ETIMEDOUT;
}
else if (intsts & MSDC_INT_DATCRCERR){
IRQ_MSG("XXX CMD<%d> MSDC_INT_DATCRCERR, SDC_DCRC_STS<0x%x>", host->mrq->cmd->opcode, sdr_read32(SDC_DCRC_STS));
data->error = (unsigned int)-EIO;
}
//if(sdr_read32(MSDC_INTEN) & MSDC_INT_XFER_COMPL) {
if (host->dma_xfer) {
complete(&host->xfer_done); /* Read CRC come fast, XFER_COMPL not enabled */
} /* PIO mode can't do complete, because not init */
}
}
/* command interrupts */
if ((cmd != NULL) && (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++ = sdr_read32(SDC_RESP3); *rsp++ = sdr_read32(SDC_RESP2);
*rsp++ = sdr_read32(SDC_RESP1); *rsp++ = sdr_read32(SDC_RESP0);
break;
default: /* Response types 1, 3, 4, 5, 6, 7(1b) */
if ((intsts & MSDC_INT_ACMDRDY) || (intsts & MSDC_INT_ACMD19_DONE)) {
*rsp = sdr_read32(SDC_ACMD_RESP);
} else {
*rsp = sdr_read32(SDC_RESP0);
}
break;
}
} else if ((intsts & MSDC_INT_RSPCRCERR) || (intsts & MSDC_INT_ACMDCRCERR)) {
if(intsts & MSDC_INT_ACMDCRCERR){
IRQ_MSG("XXX CMD<%d> MSDC_INT_ACMDCRCERR",cmd->opcode);
}
else {
IRQ_MSG("XXX CMD<%d> MSDC_INT_RSPCRCERR",cmd->opcode);
}
cmd->error = (unsigned int)-EIO;
} else if ((intsts & MSDC_INT_CMDTMO) || (intsts & MSDC_INT_ACMDTMO)) {
if(intsts & MSDC_INT_ACMDTMO){
IRQ_MSG("XXX CMD<%d> MSDC_INT_ACMDTMO",cmd->opcode);
}
else {
IRQ_MSG("XXX CMD<%d> MSDC_INT_CMDTMO",cmd->opcode);
}
cmd->error = (unsigned int)-ETIMEDOUT;
msdc_reset();
msdc_clr_fifo();
msdc_clr_int();
}
complete(&host->cmd_done);
}
/* mmc irq interrupts */
if (intsts & MSDC_INT_MMCIRQ) {
printk(KERN_INFO "msdc[%d] MMCIRQ: SDC_CSTS=0x%.8x\r\n", host->id, sdr_read32(SDC_CSTS));
}
#ifdef MT6575_SD_DEBUG
{
msdc_int_reg *int_reg = (msdc_int_reg*)&intsts;
N_MSG(INT, "IRQ_EVT(0x%x): MMCIRQ(%d) CDSC(%d), ACRDY(%d), ACTMO(%d), ACCRE(%d) AC19DN(%d)",
intsts,
int_reg->mmcirq,
int_reg->cdsc,
int_reg->atocmdrdy,
int_reg->atocmdtmo,
int_reg->atocmdcrc,
int_reg->atocmd19done);
N_MSG(INT, "IRQ_EVT(0x%x): SDIO(%d) CMDRDY(%d), CMDTMO(%d), RSPCRC(%d), CSTA(%d)",
intsts,
int_reg->sdioirq,
int_reg->cmdrdy,
int_reg->cmdtmo,
int_reg->rspcrc,
int_reg->csta);
N_MSG(INT, "IRQ_EVT(0x%x): XFCMP(%d) DXDONE(%d), DATTMO(%d), DATCRC(%d), DMAEMP(%d)",
intsts,
int_reg->xfercomp,
int_reg->dxferdone,
int_reg->dattmo,
int_reg->datcrc,
int_reg->dmaqempty);
}
#endif
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;
u32 base = host->base;
/* for sdio, not set */
if ((hw->flags & MSDC_CD_PIN_EN) == 0) {
/* Pull down card detection pin since it is not avaiable */
/*
if (hw->config_gpio_pin)
hw->config_gpio_pin(MSDC_CD_PIN, GPIO_PULL_DOWN);
*/
sdr_clr_bits(MSDC_PS, MSDC_PS_CDEN);
sdr_clr_bits(MSDC_INTEN, MSDC_INTEN_CDSC);
sdr_clr_bits(SDC_CFG, SDC_CFG_INSWKUP);
return;
}
N_MSG(CFG, "CD IRQ Eanable(%d)", enable);
if (enable) {
if (hw->enable_cd_eirq) { /* not set, never enter */
hw->enable_cd_eirq();
} else {
/* 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.
*/
//msdc_vcore_on(host); //did in msdc_init_hw()
if (hw->config_gpio_pin) /* NULL */
hw->config_gpio_pin(MSDC_CD_PIN, GPIO_PULL_UP);
sdr_set_field(MSDC_PS, MSDC_PS_CDDEBOUNCE, DEFAULT_DEBOUNCE);
sdr_set_bits(MSDC_PS, MSDC_PS_CDEN);
sdr_set_bits(MSDC_INTEN, MSDC_INTEN_CDSC);
sdr_set_bits(SDC_CFG, SDC_CFG_INSWKUP); /* not in document! Fix me */
}
} else {
if (hw->disable_cd_eirq) {
hw->disable_cd_eirq();
} else {
if (hw->config_gpio_pin) /* NULL */
hw->config_gpio_pin(MSDC_CD_PIN, GPIO_PULL_DOWN);
sdr_clr_bits(SDC_CFG, SDC_CFG_INSWKUP);
sdr_clr_bits(MSDC_PS, MSDC_PS_CDEN);
sdr_clr_bits(MSDC_INTEN, MSDC_INTEN_CDSC);
/* Here decreases a reference count to core power since card
* detection circuit is shutdown.
*/
//msdc_vcore_off(host);
}
}
}
/* called by msdc_drv_probe */
static void msdc_init_hw(struct msdc_host *host)
{
u32 base = host->base;
struct msdc_hw *hw = host->hw;
/* Power on */
#if 0 /* --- by chhung */
msdc_vcore_on(host);
msdc_pin_reset(host, MSDC_PIN_PULL_UP);
msdc_select_clksrc(host, hw->clk_src);
enable_clock(PERI_MSDC0_PDN + host->id, "SD");
msdc_vdd_on(host);
#endif /* end of --- */
/* Configure to MMC/SD mode */
sdr_set_field(MSDC_CFG, MSDC_CFG_MODE, MSDC_SDMMC);
/* Reset */
msdc_reset();
msdc_clr_fifo();
/* Disable card detection */
sdr_clr_bits(MSDC_PS, MSDC_PS_CDEN);
/* Disable and clear all interrupts */
sdr_clr_bits(MSDC_INTEN, sdr_read32(MSDC_INTEN));
sdr_write32(MSDC_INT, sdr_read32(MSDC_INT));
#if 1
/* reset tuning parameter */
sdr_write32(MSDC_PAD_CTL0, 0x00090000);
sdr_write32(MSDC_PAD_CTL1, 0x000A0000);
sdr_write32(MSDC_PAD_CTL2, 0x000A0000);
// sdr_write32(MSDC_PAD_TUNE, 0x00000000);
sdr_write32(MSDC_PAD_TUNE, 0x84101010); // for MT7620 E2 and afterward
// sdr_write32(MSDC_DAT_RDDLY0, 0x00000000);
sdr_write32(MSDC_DAT_RDDLY0, 0x10101010); // for MT7620 E2 and afterward
sdr_write32(MSDC_DAT_RDDLY1, 0x00000000);
sdr_write32(MSDC_IOCON, 0x00000000);
#if 0 // use MT7620 default value: 0x403c004f
sdr_write32(MSDC_PATCH_BIT0, 0x003C000F); /* bit0 modified: Rx Data Clock Source: 1 -> 2.0*/
#endif
if (sdr_read32(MSDC_ECO_VER) >= 4) {
if (host->id == 1) {
sdr_set_field(MSDC_PATCH_BIT1, MSDC_PATCH_BIT1_WRDAT_CRCS, 1);
sdr_set_field(MSDC_PATCH_BIT1, MSDC_PATCH_BIT1_CMD_RSP, 1);
/* internal clock: latch read data */
sdr_set_bits(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(SDC_CFG, SDC_CFG_SDIO);
/* disable detect SDIO device interupt function */
sdr_clr_bits(SDC_CFG, SDC_CFG_SDIOIDE);
/* eneable SMT for glitch filter */
sdr_set_bits(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKSMT);
sdr_set_bits(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDSMT);
sdr_set_bits(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATSMT);
#if 1
/* set clk, cmd, dat pad driving */
sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKDRVN, hw->clk_drv);
sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKDRVP, hw->clk_drv);
sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDDRVN, hw->cmd_drv);
sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDDRVP, hw->cmd_drv);
sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATDRVN, hw->dat_drv);
sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATDRVP, hw->dat_drv);
#else
sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKDRVN, 0);
sdr_set_field(MSDC_PAD_CTL0, MSDC_PAD_CTL0_CLKDRVP, 0);
sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDDRVN, 0);
sdr_set_field(MSDC_PAD_CTL1, MSDC_PAD_CTL1_CMDDRVP, 0);
sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATDRVN, 0);
sdr_set_field(MSDC_PAD_CTL2, MSDC_PAD_CTL2_DATDRVP, 0);
#endif
/* set sampling edge */
/* write crc timeout detection */
sdr_set_field(MSDC_PATCH_BIT0, 1 << 30, 1);
/* Configure to default data timeout */
sdr_set_field(SDC_CFG, SDC_CFG_DTOC, DEFAULT_DTOC);
msdc_set_buswidth(host, MMC_BUS_WIDTH_1);
N_MSG(FUC, "init hardware done!");
}
/* called by msdc_drv_remove */
static void msdc_deinit_hw(struct msdc_host *host)
{
u32 base = host->base;
/* Disable and clear all interrupts */
sdr_clr_bits(MSDC_INTEN, sdr_read32(MSDC_INTEN));
sdr_write32(MSDC_INT, sdr_read32(MSDC_INT));
/* Disable card detection */
msdc_enable_cd_irq(host, 0);
// msdc_set_power_mode(host, MMC_POWER_OFF); /* make sure power down */ /* --- by chhung */
}
/* init gpd and bd list in msdc_drv_probe */
static void msdc_init_gpd_bd(struct msdc_host *host, struct msdc_dma *dma)
{
gpd_t *gpd = dma->gpd;
bd_t *bd = dma->bd;
bd_t *ptr, *prev;
/* we just support one gpd */
int bdlen = MAX_BD_PER_GPD;
/* init the 2 gpd */
memset(gpd, 0, sizeof(gpd_t) * 2);
//gpd->next = (void *)virt_to_phys(gpd + 1); /* pointer to a null gpd, bug! kmalloc <-> virt_to_phys */
//gpd->next = (dma->gpd_addr + 1); /* bug */
gpd->next = (void *)((u32)dma->gpd_addr + sizeof(gpd_t));
//gpd->intr = 0;
gpd->bdp = 1; /* hwo, cs, bd pointer */
//gpd->ptr = (void*)virt_to_phys(bd);
gpd->ptr = (void *)dma->bd_addr; /* physical address */
memset(bd, 0, sizeof(bd_t) * bdlen);
ptr = bd + bdlen - 1;
//ptr->eol = 1; /* 0 or 1 [Fix me]*/
//ptr->next = 0;
while (ptr != bd) {
prev = ptr - 1;
prev->next = (void *)(dma->bd_addr + sizeof(bd_t) *(ptr - bd));
ptr = prev;
}
}
static int msdc_drv_probe(struct platform_device *pdev)
{
struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
__iomem void *base;
struct mmc_host *mmc;
struct resource *mem;
struct msdc_host *host;
struct msdc_hw *hw;
int ret, irq;
u32 reg;
printk("MTK MSDC device init.\n");
mtk_sd_device.dev.platform_data = &msdc0_hw;
if (ralink_soc == MT762X_SOC_MT7620A || ralink_soc == MT762X_SOC_MT7621AT) {
//#if defined (CONFIG_RALINK_MT7620) || defined (CONFIG_RALINK_MT7621)
reg = sdr_read32((volatile u32*)(RALINK_SYSCTL_BASE + 0x60)) & ~(0x3<<18);
//#if defined (CONFIG_RALINK_MT7620)
if (ralink_soc == MT762X_SOC_MT7620A)
reg |= 0x1<<18;
//#endif
} else {
//#elif defined (CONFIG_RALINK_MT7628)
/* TODO: maybe omitted when RAether already toggle AGPIO_CFG */
reg = sdr_read32((volatile u32*)(RALINK_SYSCTL_BASE + 0x3c));
reg |= 0x1e << 16;
sdr_write32((volatile u32*)(RALINK_SYSCTL_BASE + 0x3c), reg);
reg = sdr_read32((volatile u32*)(RALINK_SYSCTL_BASE + 0x60)) & ~(0x3<<10);
#if defined (CONFIG_MTK_MMC_EMMC_8BIT)
reg |= 0x3<<26 | 0x3<<28 | 0x3<<30;
msdc0_hw.data_pins = 8,
#endif
//#endif
}
sdr_write32((volatile u32*)(RALINK_SYSCTL_BASE + 0x60), reg);
//platform_device_register(&mtk_sd_device);
/* end of +++ */
pdev->dev.platform_data = &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;
hw = (struct msdc_hw*)pdev->dev.platform_data;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(pdev, 0);
//BUG_ON((!hw) || (!mem) || (irq < 0)); /* --- by chhung */
base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
/* 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;
/* For sd card: MSDC_SYS_SUSPEND | MSDC_WP_PIN_EN | MSDC_CD_PIN_EN | MSDC_REMOVABLE | MSDC_HIGHSPEED,
For sdio : MSDC_EXT_SDIO_IRQ | MSDC_HIGHSPEED */
if (hw->flags & MSDC_HIGHSPEED) {
mmc->caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED;
}
if (hw->data_pins == 4) { /* current data_pins are all 4*/
mmc->caps |= MMC_CAP_4_BIT_DATA;
} else if (hw->data_pins == 8) {
mmc->caps |= MMC_CAP_8_BIT_DATA;
}
if ((hw->flags & MSDC_SDIO_IRQ) || (hw->flags & MSDC_EXT_SDIO_IRQ))
mmc->caps |= MMC_CAP_SDIO_IRQ; /* yes for sdio */
cd_active_low = !of_property_read_bool(pdev->dev.of_node, "mediatek,cd-high");
mtk_sw_poll = of_property_read_bool(pdev->dev.of_node, "mediatek,cd-poll");
if (mtk_sw_poll)
mmc->caps |= MMC_CAP_NEEDS_POLL;
/* MMC core transfer sizes tunable parameters */
#if LINUX_VERSION_CODE > KERNEL_VERSION(3,10,0)
mmc->max_segs = MAX_HW_SGMTS;
#else
mmc->max_hw_segs = MAX_HW_SGMTS;
mmc->max_phys_segs = MAX_PHY_SGMTS;
#endif
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 = 0;
host->error = 0;
host->irq = irq;
host->base = (unsigned long) 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 */
host->dma.used_gpd = 0;
host->dma.used_bd = 0;
mmc_dev(mmc)->dma_mask = NULL;
/* using dma_alloc_coherent*/ /* todo: using 1, for all 4 slots */
host->dma.gpd = dma_alloc_coherent(NULL, MAX_GPD_NUM * sizeof(gpd_t), &host->dma.gpd_addr, GFP_KERNEL);
host->dma.bd = dma_alloc_coherent(NULL, MAX_BD_NUM * sizeof(bd_t), &host->dma.bd_addr, GFP_KERNEL);
BUG_ON((!host->dma.gpd) || (!host->dma.bd));
msdc_init_gpd_bd(host, &host->dma);
#if 0
tasklet_init(&host->card_tasklet, msdc_tasklet_card, (ulong)host);
#else
INIT_DELAYED_WORK(&host->card_delaywork, msdc_tasklet_card);
#endif
spin_lock_init(&host->lock);
msdc_init_hw(host);
if (ralink_soc == MT762X_SOC_MT7621AT)
ret = request_irq((unsigned int)irq, msdc_irq, 0, dev_name(&pdev->dev), host);
else
ret = request_irq((unsigned int)irq, msdc_irq, IRQF_TRIGGER_LOW, dev_name(&pdev->dev), host);
if (ret) goto release;
// mt65xx_irq_unmask(irq); /* --- by chhung */
if (hw->flags & MSDC_CD_PIN_EN) { /* not set for sdio */
if (hw->request_cd_eirq) { /* not set for MT6575 */
hw->request_cd_eirq(msdc_eirq_cd, (void*)host); /* msdc_eirq_cd will not be used! */
}
}
if (hw->request_sdio_eirq) /* set to combo_sdio_request_eirq() for WIFI */
hw->request_sdio_eirq(msdc_eirq_sdio, (void*)host); /* msdc_eirq_sdio() will be called when EIRQ */
if (hw->register_pm) {/* yes for sdio */
#ifdef CONFIG_PM
hw->register_pm(msdc_pm, (void*)host); /* combo_sdio_register_pm() */
#endif
if(hw->flags & MSDC_SYS_SUSPEND) { /* will not set for WIFI */
ERR_MSG("MSDC_SYS_SUSPEND and register_pm both set");
}
//mmc->pm_flags |= MMC_PM_IGNORE_PM_NOTIFY; /* pm not controlled by system but by client. */ /* --- by chhung */
}
platform_set_drvdata(pdev, mmc);
ret = mmc_add_host(mmc);
if (ret) goto free_irq;
/* 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;
free_irq:
free_irq(irq, host);
release:
platform_set_drvdata(pdev, NULL);
msdc_deinit_hw(host);
#if 0
tasklet_kill(&host->card_tasklet);
#else
cancel_delayed_work_sync(&host->card_delaywork);
#endif
if (mem)
release_mem_region(mem->start, mem->end - mem->start + 1);
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;
struct resource *mem;
mmc = platform_get_drvdata(pdev);
BUG_ON(!mmc);
host = mmc_priv(mmc);
BUG_ON(!host);
ERR_MSG("removed !!!");
platform_set_drvdata(pdev, NULL);
mmc_remove_host(host->mmc);
msdc_deinit_hw(host);
#if 0
tasklet_kill(&host->card_tasklet);
#else
cancel_delayed_work_sync(&host->card_delaywork);
#endif
free_irq(host->irq, host);
dma_free_coherent(NULL, MAX_GPD_NUM * sizeof(gpd_t), host->dma.gpd, host->dma.gpd_addr);
dma_free_coherent(NULL, MAX_BD_NUM * sizeof(bd_t), host->dma.bd, host->dma.bd_addr);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (mem)
release_mem_region(mem->start, mem->end - mem->start + 1);
mmc_free_host(host->mmc);
return 0;
}
/* Fix me: Power Flow */
#ifdef CONFIG_PM
static int msdc_drv_suspend(struct platform_device *pdev, pm_message_t state)
{
int ret = 0;
struct mmc_host *mmc = platform_get_drvdata(pdev);
struct msdc_host *host = mmc_priv(mmc);
if (mmc && state.event == PM_EVENT_SUSPEND && (host->hw->flags & MSDC_SYS_SUSPEND)) { /* will set for card */
msdc_pm(state, (void*)host);
}
return ret;
}
static int msdc_drv_resume(struct platform_device *pdev)
{
int ret = 0;
struct mmc_host *mmc = platform_get_drvdata(pdev);
struct msdc_host *host = mmc_priv(mmc);
struct pm_message state;
state.event = PM_EVENT_RESUME;
if (mmc && (host->hw->flags & MSDC_SYS_SUSPEND)) {/* will set for card */
msdc_pm(state, (void*)host);
}
/* This mean WIFI not controller by PM */
return ret;
}
#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;
ret = platform_driver_register(&mt_msdc_driver);
if (ret) {
printk(KERN_ERR DRV_NAME ": Can't register driver");
return ret;
}
printk(KERN_INFO DRV_NAME ": MediaTek MT6575 MSDC Driver\n");
#if defined (MT6575_SD_DEBUG)
msdc_debug_proc_init();
#endif
return 0;
}
static void __exit mt_msdc_exit(void)
{
// platform_device_unregister(&mtk_sd_device);
platform_driver_unregister(&mt_msdc_driver);
}
module_init(mt_msdc_init);
module_exit(mt_msdc_exit);
MODULE_LICENSE("GPL");