Hi Jaehoon Chung,
Yes you need to apply the following patchset
http://comments.gmane.org/gmane.comp.boot-loaders.u-boot/132754
Regards,
Rajeshwari Shinde.
On Tue, Jun 12, 2012 at 2:07 PM, Jaehoon Chung <jh80.ch...@samsung.com> wrote:
> Hi Rajeshwari,
>
> Before applied this patch, it must apply your patch for PINMUX. right?
>
> Best Regards,
> Jaehoon Chung
>
> On 06/12/2012 03:14 PM, Chander Kashyap wrote:
>
>> Hi,
>>
>> On 11 June 2012 19:26, Rajeshwari Birje <rajeshwari.bi...@gmail.com> wrote:
>>> Hi All,
>>>
>>> ccing Jaehoon Chung
>>>
>>> Regards,
>>> Rajeshwari Shinde.
>>>
>>>
>>> On Mon, Jun 11, 2012 at 6:18 PM, Rajeshwari Shinde
>>> <rajeshwar...@samsung.com> wrote:
>>>> Add DWMMC driver support and resgister description for same.
>>>>
>>>> Signed-off-by: Alim Akhtar <alim.akh...@samsung.com>
>>>> Signed-off-by: Terry Lambert <tlamb...@chromium.org>
>>>> Signed-off-by: Rajeshwari Shinde <rajeshwar...@samsung.com>
>>>> ---
>>>> Changes in V2:
>>>> - Incorporated comments from Jaehung Chung.
>>>> - Renamed MSHCI to DWMMC through out the driver.
>>>> - Renamed files to exynos_dwmmc from exynos_mshc.
>>>> - Removed major hard codings of values.
>>>> - Wrote dw_mci_writel and dw_mci_readl functions for writel and
>>>> readl.
>>>> - Removed structure of registers and defined each one separately.
>>>> orch/arm/include/asm/arch-exynos/exynos_dwmmc.h | 229 +++++++++
>>>> drivers/mmc/Makefile | 1 +
>>>> drivers/mmc/exynos_dwmmc.c | 566
>>>> +++++++++++++++++++++++
>>>> 3 files changed, 796 insertions(+), 0 deletions(-)
>>>> create mode 100644 arch/arm/include/asm/arch-exynos/exynos_dwmmc.h
>>>> create mode 100644 drivers/mmc/exynos_dwmmc.c
>>>>
>>>> diff --git a/arch/arm/include/asm/arch-exynos/exynos_dwmmc.h
>>>> b/arch/arm/include/asm/arch-exynos/exynos_dwmmc.h
>>>> new file mode 100644
>>>> index 0000000..349bd75
>>>> --- /dev/null
>>>> +++ b/arch/arm/include/asm/arch-exynos/exynos_dwmmc.h
>>>> @@ -0,0 +1,229 @@
>>>> +/*
>>>> + * (C) Copyright 2012 SAMSUNG Electronics
>>>> + * Abhilash Kesavan <a.kesa...@samsung.com>
>>>> + *
>>>> + * This program is free software; you can redistribute it and/or modify
>>>> + * it under the terms of the GNU General Public License as published by
>>>> + * the Free Software Foundation; either version 2 of the License, or
>>>> + * (at your option) any later version.
>>>> + *
>>>> + * This program is distributed in the hope that it will be useful,
>>>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>>>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>>>> + * GNU General Public License for more details.
>>>> + *
>>>> + * You should have received a copy of the GNU General Public License
>>>> + * along with this program; if not, write to the Free Software
>>>> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
>>>> USA
>>>> + *
>>>> + */
>>>> +#ifndef __ASM_ARCH_COMMON_DWMMC_H
>>>> +#define __ASM_ARCH_COMMON_DWMMC_H
>>>> +
>>>> +#include <asm/arch/pinmux.h>
>>>> +
>>>> +#ifndef __ASSEMBLY__
>>>> +struct dw_mci_host {
>>>> + void *ioaddr;
>>>> + unsigned int clock; /* Current clock in MHz */
>>>> + enum periph_id peripheral;
>>>> + unsigned int verid; /* SDHCI spec. version */
>>>> + unsigned int data_offset; /* DATA offset */
>>>> +};
>>>> +
>>>> +/*
>>>> + * Struct idma
>>>> + * Holds the descriptor list
>>>> + */
>>>> +struct dw_mci_idmac {
>>>> + u32 des0;
>>>> + u32 des1;
>>>> + u32 des2;
>>>> + u32 des3;
>>>> +};
>>>> +
>> #endif
>>>> +/* Control Register Register */
>>>> +#define DWMCI_CONTROL 0x00
>>>> +#define CTRL_RESET (0x1 << 0)
>>>> +#define FIFO_RESET (0x1 << 1)
>>>> +#define DMA_RESET (0x1 << 2)
>>>> +#define DMA_ENABLE (0x1 << 5)
>>>> +#define SEND_AS_CCSD (0x1 << 10)
>>>> +#define ENABLE_IDMAC (0x1 << 25)
>>>> +
>>>> +/* Power Enable Register */
>>>> +#define DWMCI_PWREN 0x04
>>>> +#define POWER_ENABLE (0x1 << 0)
>>>> +
>>>> +#define DWMCI_CLKDIV 0x08
>>>> +#define DWMCI_CLKSRC 0x0c
>>>> +
>>>> +/* Clock Enable Register */
>>>> +#define DWMCI_CLKENA 0x10
>>>> +#define CLK_ENABLE (0x1 << 0)
>>>> +#define CLK_DISABLE (0x0 << 0)
>>>> +
>>>> +/* Timeout Register */
>>>> +#define DWMCI_TMOUT 0x14
>>>> +#define TMOUT_MAX 0xffffffff
>>>> +
>>>> +/* Card Type Register */
>>>> +#define DWMCI_CTYPE 0x18
>>>> +#define PORT0_CARD_WIDTH1 0
>>>> +#define PORT0_CARD_WIDTH4 (0x1 << 0)
>>>> +#define PORT0_CARD_WIDTH8 (0x1 << 16)
>>>> +
>>>> +#define DWMCI_BLKSIZE 0x1c
>>>> +#define DWMCI_BYTCNT 0x20
>>>> +
>>>> +/* Interrupt Mask Register */
>>>> +#define DWMCI_INTMASK 0x24
>>>> +#define INTMSK_ALL 0xffffffff
>>>> +#define INTMSK_RE (0x1 << 1)
>>>> +#define INTMSK_CDONE (0x1 << 2)
>>>> +#define INTMSK_DTO (0x1 << 3)
>>>> +#define INTMSK_DCRC (0x1 << 7)
>>>> +#define INTMSK_RTO (0x1 << 8)
>>>> +#define INTMSK_DRTO (0x1 << 9)
>>>> +#define INTMSK_HTO (0x1 << 10)
>>>> +#define INTMSK_FRUN (0x1 << 11)
>>>> +#define INTMSK_HLE (0x1 << 12)
>>>> +#define INTMSK_SBE (0x1 << 13)
>>>> +#define INTMSK_ACD (0x1 << 14)
>>>> +#define INTMSK_EBE (0x1 << 15)
>>>> +
>>>> +#define DWMCI_CMDARG 0x28
>>>> +
>>>> +/* Command Register */
>>>> +#define DWMCI_CMD 0x2c
>>>> +#define CMD_RESP_EXP_BIT (0x1 << 6)
>>>> +#define CMD_RESP_LENGTH_BIT (0x1 << 7)
>>>> +#define CMD_CHECK_CRC_BIT (0x1 << 8)
>>>> +#define CMD_DATA_EXP_BIT (0x1 << 9)
>>>> +#define CMD_RW_BIT (0x1 << 10)
>>>> +#define CMD_SENT_AUTO_STOP_BIT (0x1 << 12)
>>>> +#define CMD_WAIT_PRV_DAT_BIT (0x1 << 13)
>>>> +#define CMD_SEND_CLK_ONLY (0x1 << 21)
>>>> +#define CMD_USE_HOLD_REG (0x1 << 29)
>>>> +#define CMD_STRT_BIT (0x1 << 31)
>>>> +#define CMD_ONLY_CLK (CMD_STRT_BIT | CMD_SEND_CLK_ONLY | \
>>>> + CMD_WAIT_PRV_DAT_BIT)
>>>> +
>>>> +#define DWMCI_RESP0 0x30
>>>> +#define DWMCI_RESP1 0x34
>>>> +#define DWMCI_RESP2 0x38
>>>> +#define DWMCI_RESP3 0x3c
>>>> +
>>>> +#define DWMCI_MINTSTS 0x40
>>>> +
>>>> +/* Raw Interrupt Register */
>>>> +#define DWMCI_RINTSTS 0x44
>>>> +#define DATA_ERR (INTMSK_EBE | INTMSK_SBE | INTMSK_HLE | \
>>>> + INTMSK_FRUN | INTMSK_EBE | INTMSK_DCRC)
>>>> +#define DATA_TOUT (INTMSK_HTO | INTMSK_DRTO)
>>>> +
>>>> +/* Status Register */
>>>> +#define DWMCI_STATUS 0x48
>>>> +#define DATA_BUSY (0x1 << 9)
>>>> +
>>>> +/* FIFO Threshold Watermark Register */
>>>> +#define DWMCI_FIFOTH 0x4c
>>>> +#define TX_WMARK (0xFFF << 0)
>>>> +#define RX_WMARK (0xFFF << 16)
>>>> +#define MSIZE_MASK (0x7 << 28)
>>>> +
>>>> +#define DWMCI_CDETECT 0x50
>>>> +#define DWMCI_WRTORT 0x54
>>>> +#define DWMCI_GPIO 0x58
>>>> +#define DWMCI_TCBCNT 0x5c
>>>> +#define DWMCI_TBBCNT 0x60
>>>> +#define DWMCI_DEBENCE 0x64
>>>> +#define DWMCI_USRID 0x68
>>>> +#define DWMCI_VERID 0x6c
>>>> +#define DWMCI_HCON 0x70
>>>> +#define DWMCI_UHS_REG 0x74
>>>> +#define DWMCI_RST_n 0x78
>>>> +
>>>> +/* DW DMA Mutiple Transaction Size */
>>>> +#define MSIZE_8 (2 << 28)
>>>> +
>>>> +/* Bus Mode Register */
>>>> +#define DWMCI_BMOD 0x80
>>>> +#define BMOD_IDMAC_RESET (0x1 << 0)
>>>> +#define BMOD_IDMAC_FB (0x1 << 1)
>>>> +#define BMOD_IDMAC_ENABLE (0x1 << 7)
>>>> +
>>>> +#define DWMCI_PLDMND 0x84
>>>> +#define DWMCI_DBADDR 0x88
>>>> +
>>>> +/* IDMAC bits */
>>>> +#define DWMCI_IDSTS 0x8c
>>>> +#define DWMCI_IDMAC_OWN (0x1 << 31)
>>>> +#define DWMCI_IDMAC_CH (0x1 << 4)
>>>> +#define DWMCI_IDMAC_FS (0x1 << 3)
>>>> +#define DWMCI_IDMAC_LD (0x1 << 2)
>>>> +
>>>> +#define DWMCI_IDINTEN 0x90
>>>> +#define DWMCI_DSCADDR 0x94
>>>> +#define DWMCI_BUFADDR 0x98
>>>> +
>>>> +/* CLKSEL bits*/
>>>> +#define DWMCI_CLKSEL 0x9c
>>>> +#define SELCLK_SAMPLE_1PHASE_Shift (0x1 << 0)
>>>> +#define SELCLK_DRV_3PHASE_SHIFT (0x3 << 16)
>>>> +#define SELCLK_DRV_2PHASE_SHIFT (0x2 << 16)
>>>> +#define SELCLK_DIV_RATIO (0x3 << 24)
>>>> +
>>>> +#define DWMCI_CARDTHRCTL 0x100
>>>> +
>>>> +/*
>>>> + * Data offset is difference according to Version
>>>> + * Lower than 2.40a : data register offest is 0x100
>>>> + */
>>>> +#define DW_MMC_240A 0x240a
>>>> +#define DATA_OFFSET 0x100
>>>> +#define DATA_240A_OFFSET 0x200
>>>> +
>>>> +#define MAX_DWMMC_CLOCK 52000000 /* Max limit is 52MHz */
>>>> +#define MIN_DWMMC_CLOCK 400000 /* Lower limit is 400KHz */
>>>> +#define COMMAND_TIMEOUT 10000
>>>> +#define TIMEOUT_MS 100
>>>> +#define MAXCLKDIV 0xff
>>>> +
>>>> +/* Version ID register define */
>>>> +#define GET_VERID(x) ((x) & 0xFFFF)
>>>> +
>>>> +static inline void dw_mci_writel(struct dw_mci_host *host, u32 val, int
>>>> reg)
>>>> +{
>>>> + writel(val, host->ioaddr + reg);
>>>> +}
>>>> +
>>>> +static inline void dw_mci_writew(struct dw_mci_host *host, u16 val, int
>>>> reg)
>>>> +{
>>>> + writew(val, host->ioaddr + reg);
>>>> +}
>>>> +
>>>> +static inline void dw_mci_writeb(struct dw_mci_host *host, u8 val, int
>>>> reg)
>>>> +{
>>>> + writeb(val, host->ioaddr + reg);
>>>> +}
>>>> +
>>>> +static inline u32 dw_mci_readl(struct dw_mci_host *host, int reg)
>>>> +{
>>>> + return readl(host->ioaddr + reg);
>>>> +}
>>>> +
>>>> +static inline u16 dw_mci_readw(struct dw_mci_host *host, int reg)
>>>> +{
>>>> + return readw(host->ioaddr + reg);
>>>> +}
>>>> +
>>>> +static inline u8 dw_mci_readb(struct dw_mci_host *host, int reg)
>>>> +{
>>>> + return readb(host->ioaddr + reg);
>>>> +}
>>>> +
>>>> +int dw_mci_init(enum periph_id periph_id, int bus_width);
>>>> +
>>>> +#endif /* __ASSEMBLY__ */
>> remove at this place after structure declaration.
>>>> +#endif /* __ASM_ARCH_COMMON_DWMMC_H */
>>>> diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
>>>> index c245352..cf0be05 100644
>>>> --- a/drivers/mmc/Makefile
>>>> +++ b/drivers/mmc/Makefile
>>>> @@ -27,6 +27,7 @@ LIB := $(obj)libmmc.o
>>>>
>>>> COBJS-$(CONFIG_BFIN_SDH) += bfin_sdh.o
>>>> COBJS-$(CONFIG_DAVINCI_MMC) += davinci_mmc.o
>>>> +COBJS-$(CONFIG_EXYNOS_DWMMC) += exynos_dwmmc.o
>>>> COBJS-$(CONFIG_FSL_ESDHC) += fsl_esdhc.o
>>>> COBJS-$(CONFIG_FTSDC010) += ftsdc010_esdhc.o
>>>> COBJS-$(CONFIG_GENERIC_MMC) += mmc.o
>>>> diff --git a/drivers/mmc/exynos_dwmmc.c b/drivers/mmc/exynos_dwmmc.c
>>>> new file mode 100644
>>>> index 0000000..96f6ceb
>>>> --- /dev/null
>>>> +++ b/drivers/mmc/exynos_dwmmc.c
>>>> @@ -0,0 +1,566 @@
>>>> +/*
>>>> + * (C) Copyright 2012 Samsung Electronics Co. Ltd
>>>> + *
>>>> + * See file CREDITS for list of people who contributed to this
>>>> + * project.
>>>> + *
>>>> + * This program is free software; you can redistribute it and/or
>>>> + * modify it under the terms of the GNU General Public License as
>>>> + * published by the Free Software Foundation; either version 2 of
>>>> + * the License, or (at your option) any later version.
>>>> + *
>>>> + * This program is distributed in the hope that it will be useful,
>>>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>>>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>>>> + * GNU General Public License for more details.
>>>> + *
>>>> + * You should have received a copy of the GNU General Public License
>>>> + * along with this program; if not, write to the Free Software
>>>> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
>>>> + * MA 02111-1307 USA
>>>> + */
>>>> +
>>>> +#include <common.h>
>>>> +#include <mmc.h>
>>>> +#include <asm/errno.h>
>>>> +#include <asm/arch/clk.h>
>>>> +#include <asm/arch/cpu.h>
>>>> +#include <asm/arch/exynos_dwmmc.h>
>>>> +#include <asm/arch/pinmux.h>
>>>> +
>>>> +/* support 4 mmc hosts */
>>>> +enum {
>>>> + MAX_MMC_HOSTS = 4
>>>> +};
>>>> +
>>>> +static struct mmc dw_mci_dev[MAX_MMC_HOSTS];
>>>> +static struct dw_mci_host dw_mci_host[MAX_MMC_HOSTS];
>>>> +static int num_devs;
>>>> +
>>>> +/**
>>>> + * Set bits of DWMMC host control register.
>>>> + *
>>>> + * @param host DWMMC host
>>>> + * @param bits bits to be set
>>>> + * @return 0 on success, TIMEOUT on failure
>>>> + */
>>>> +static int dw_mci_setbits(struct dw_mci_host *host, unsigned int bits)
>>>> +{
>>>> + ulong start;
>>>> +
>>>> + setbits_le32(host->ioaddr + DWMCI_CONTROL, bits);
>>>> +
>>>> + start = get_timer(0);
>>>> + while (dw_mci_readl(host, DWMCI_CONTROL) & bits) {
>>>> + if (get_timer(start) > TIMEOUT_MS) {
>>>> + debug("Set bits failed\n");
>>>> + return TIMEOUT;
>>>> + }
>>>> + }
>>>> + return 0;
>>>> +}
>>>> +
>>>> +/**
>>>> + * Reset DWMMC host control register.
>>>> + *
>>>> + * @param host DWMMC host
>>>> + * @return 0 on success, TIMEOUT on failure
>>>> + */
>>>> +static int dw_mci_reset_all(struct dw_mci_host *host)
>>>> +{
>>>> + ulong start;
>>>> +
>>>> + /*
>>>> + * Before we reset ciu check the DATA0 line. If it is low and
>>>> + * we resets the ciu then we might see some errors.
>>>> + */
>>>> + start = get_timer(0);
>>>> + while (dw_mci_readl(host, DWMCI_STATUS) & DATA_BUSY) {
>>>> + if (get_timer(start) > TIMEOUT_MS) {
>>>> + debug("Controller did not release"
>>>> + "data0 before ciu reset\n");
>>>> + return TIMEOUT;
>>>> + }
>>>> + }
>>>> + return dw_mci_setbits(host, CTRL_RESET | FIFO_RESET | DMA_RESET);
>>>> +}
>>>> +
>>>> +static void dw_mci_set_mdma_desc(u8 *desc_vir, u8 *desc_phy,
>>>> + unsigned int des0, unsigned int des1, unsigned int des2)
>>>> +{
>>>> + struct dw_mci_idmac *desc = (struct dw_mci_idmac *)desc_vir;
>>>> +
>>>> + desc->des0 = des0;
>>>> + desc->des1 = des1;
>>>> + desc->des2 = des2;
>>>> + desc->des3 = (unsigned int)desc_phy + sizeof(struct dw_mci_idmac);
>>>> +}
>>>> +
>>>> +static int dw_mci_prepare_data(struct dw_mci_host *host, struct mmc_data
>>>> *data)
>>>> +{
>>>> + unsigned int i, data_cnt, des_flag, blksz;
>>>> + int err;
>>>> + ulong data_start, data_end;
>>>> + static struct dw_mci_idmac idmac_desc[0x10000];
>>>> + struct dw_mci_idmac *pdesc_dmac;
>>>> +
>>>> + err = dw_mci_setbits(host, FIFO_RESET);
>>>> + if (err) {
>>>> + debug("Fail to reset FIFO\n");
>>>> + return err;
>>>> + }
>>>> +
>>>> + pdesc_dmac = idmac_desc;
>>>> + blksz = data->blocksize;
>>>> + data_cnt = data->blocks;
>>>> +
>>>> + for (i = 0;; i++) {
>>>> + des_flag = (DWMCI_IDMAC_OWN | DWMCI_IDMAC_CH);
>>>> + des_flag |= (i == 0) ? DWMCI_IDMAC_FS : 0;
>>>> + if (data_cnt <= 8) {
>>>> + des_flag |= DWMCI_IDMAC_LD;
>>>> + dw_mci_set_mdma_desc((u8 *)pdesc_dmac,
>>>> + (u8 *)virt_to_phys(pdesc_dmac),
>>>> + des_flag, blksz * data_cnt,
>>>> + (unsigned int)(virt_to_phys(data->dest)) +
>>>> + (unsigned int)(i * 0x1000));
>>>> + break;
>>>> + }
>>>> + /* max transfer size is 4KB per descriptor */
>>>> + dw_mci_set_mdma_desc((u8 *)pdesc_dmac,
>>>> + (u8 *)virt_to_phys(pdesc_dmac),
>>>> + des_flag, blksz * 8,
>>>> + virt_to_phys(data->dest) +
>>>> + (unsigned int)(i * 0x1000));
>>>> +
>>>> + data_cnt -= 8;
>>>> + pdesc_dmac++;
>>>> + }
>>>> +
>>>> + data_start = (ulong)idmac_desc;
>>>> + data_end = (ulong)pdesc_dmac;
>>>> + flush_dcache_range(data_start, data_end + ARCH_DMA_MINALIGN);
>>>> +
>>>> + data_start = (ulong)data->dest;
>>>> + data_end = (ulong)(data->dest + data->blocks * data->blocksize);
>>>> + flush_dcache_range(data_start, data_end);
>>>> +
>>>> + dw_mci_writel(host, (unsigned int)virt_to_phys(idmac_desc),
>>>> + DWMCI_DBADDR);
>>>> +
>>>> + /* enable the Internal DMA Controller */
>>>> + setbits_le32(host->ioaddr + DWMCI_CONTROL, ENABLE_IDMAC |
>>>> + DMA_ENABLE);
>>>> + setbits_le32(host->ioaddr + DWMCI_BMOD, BMOD_IDMAC_ENABLE |
>>>> + BMOD_IDMAC_FB);
>>>> +
>>>> + dw_mci_writel(host, data->blocksize, DWMCI_BLKSIZE);
>>>> + dw_mci_writel(host, data->blocksize * data->blocks, DWMCI_BYTCNT);
>>>> +
>>>> + return 0;
>>>> +}
>>>> +
>>>> +static int dw_mci_set_transfer_mode(struct dw_mci_host *host,
>>>> + struct mmc_data *data)
>>>> +{
>>>> + int mode = CMD_DATA_EXP_BIT;
>>>> +
>>>> + if (data->blocks > 1)
>>>> + mode |= CMD_SENT_AUTO_STOP_BIT;
>>>> + if (data->flags & MMC_DATA_WRITE)
>>>> + mode |= CMD_RW_BIT;
>>>> +
>>>> + return mode;
>>>> +}
>>>> +
>>>> +/*
>>>> + * Sends a command out on the bus.
>>>> + *
>>>> + * @param mmc mmc device
>>>> + * @param cmd mmc_cmd to be sent on bus
>>>> + * @param data mmc data to be sent (optional)
>>>> + *
>>>> + * @return return 0 if ok, else error number
>>>> + */
>>>> +static int dw_mci_send_command(struct mmc *mmc, struct mmc_cmd *cmd,
>>>> + struct mmc_data *data)
>>>> +{
>>>> + struct dw_mci_host *host = mmc->priv;
>>>> +
>>>> + int flags = 0, i, err;
>>>> + unsigned int mask;
>>>> + ulong start, data_start, data_end;
>>>> +
>>>> + /*
>>>> + * We shouldn't wait for data inihibit for stop commands, even
>>>> + * though they might use busy signaling
>>>> + */
>>>> + start = get_timer(0);
>>>> + while (dw_mci_readl(host, DWMCI_STATUS) & DATA_BUSY) {
>>>> + if (get_timer(start) > COMMAND_TIMEOUT) {
>>>> + debug("timeout on data busy\n");
>>>> + return TIMEOUT;
>>>> + }
>>>> + }
>>>> +
>>>> + if (dw_mci_readl(host, DWMCI_RINTSTS)) {
>>>> + if ((dw_mci_readl(host, DWMCI_RINTSTS) &
>>>> + (INTMSK_CDONE | INTMSK_ACD)) == 0)
>>>> + debug("there are pending interrupts 0x%x\n",
>>>> + dw_mci_readl(host, DWMCI_RINTSTS));
>>>> + }
>>>> + /* It clears all pending interrupts before sending a command*/
>>>> + dw_mci_writel(host, INTMSK_ALL, DWMCI_RINTSTS);
>>>> +
>>>> + if (data) {
>>>> + err = dw_mci_prepare_data(host, data);
>>>> + if (err) {
>>>> + debug("fail to prepare data\n");
>>>> + return err;
>>>> + }
>>>> + }
>>>> +
>>>> + dw_mci_writel(host, cmd->cmdarg, DWMCI_CMDARG);
>>>> +
>>>> + if (data)
>>>> + flags = dw_mci_set_transfer_mode(host, data);
>>>> +
>>>> + if ((cmd->resp_type & MMC_RSP_136) && (cmd->resp_type &
>>>> MMC_RSP_BUSY))
>>>> + /* this is out of SD spec */
>>>> + return -1;
>>>> +
>>>> + if (cmd->resp_type & MMC_RSP_PRESENT) {
>>>> + flags |= CMD_RESP_EXP_BIT;
>>>> + if (cmd->resp_type & MMC_RSP_136)
>>>> + flags |= CMD_RESP_LENGTH_BIT;
>>>> + }
>>>> +
>>>> + if (cmd->resp_type & MMC_RSP_CRC)
>>>> + flags |= CMD_CHECK_CRC_BIT;
>>>> + flags |= (cmd->cmdidx | CMD_STRT_BIT | CMD_USE_HOLD_REG |
>>>> + CMD_WAIT_PRV_DAT_BIT);
>>>> +
>>>> + mask = dw_mci_readl(host, DWMCI_CMD);
>>>> + if (mask & CMD_STRT_BIT)
>>>> + debug("cmd busy, current cmd: %d", cmd->cmdidx);
>>>> +
>>>> + dw_mci_writel(host, flags, DWMCI_CMD);
>>>> + /* wait for command complete by busy waiting. */
>>>> + for (i = 0; i < COMMAND_TIMEOUT; i++) {
>>>> + mask = dw_mci_readl(host, DWMCI_RINTSTS);
>>>> + if (mask & INTMSK_CDONE) {
>>>> + if (!data)
>>>> + dw_mci_writel(host, mask, DWMCI_RINTSTS);
>>>> + break;
>>>> + }
>>>> + }
>>>> + /* timeout for command complete. */
>>>> + if (COMMAND_TIMEOUT == i) {
>>>> + debug("timeout waiting for status update\n");
>>>> + return TIMEOUT;
>>>> + }
>>>> +
>>>> + if (mask & INTMSK_RTO) {
>>>> + if (((cmd->cmdidx == MMC_CMD_SEND_EXT_CSD ||
>>>> + cmd->cmdidx == MMC_CMD_APP_CMD)) == 0) {
>>>> + debug("response timeout error: 0x%x cmd: %d\n",
>>>> + mask, cmd->cmdidx);
>>>> + }
>>>> + return TIMEOUT;
>>>> + } else if (mask & INTMSK_RE) {
>>>> + debug("response error: 0x%x cmd: %d\n", mask, cmd->cmdidx);
>>>> + return -1;
>>>> + }
>>>> + if (cmd->resp_type & MMC_RSP_PRESENT) {
>>>> + if (cmd->resp_type & MMC_RSP_136) {
>>>> + /* CRC is stripped so we need to do some shifting.
>>>> */
>>>> + cmd->response[0] = dw_mci_readl(host,
>>>> +
>>>> DWMCI_RESP3);
>>>> + cmd->response[1] = dw_mci_readl(host,
>>>> +
>>>> DWMCI_RESP2);
>>>> + cmd->response[2] = dw_mci_readl(host,
>>>> +
>>>> DWMCI_RESP1);
>>>> + cmd->response[3] = dw_mci_readl(host,
>>>> +
>>>> DWMCI_RESP0);
>>>> + } else {
>>>> + cmd->response[0] = dw_mci_readl(host, DWMCI_RESP0);
>>>> + debug("\tcmd->response[0]: 0x%08x\n",
>>>> cmd->response[0]);
>>>> + }
>>>> + }
>>>> +
>>>> + if (data) {
>>>> + while (!(mask & (DATA_ERR | DATA_TOUT | INTMSK_DTO)))
>>>> + mask = dw_mci_readl(host, DWMCI_RINTSTS);
>>>> + dw_mci_writel(host, mask, DWMCI_RINTSTS);
>>>> + if (data->flags & MMC_DATA_READ) {
>>>> + data_start = (ulong)data->dest;
>>>> + data_end = (ulong)data->dest +
>>>> + data->blocks * data->blocksize;
>>>> + invalidate_dcache_range(data_start, data_end);
>>>> + }
>>>> + if (mask & (DATA_ERR | DATA_TOUT)) {
>>>> + debug("error during transfer: 0x%x\n", mask);
>>>> + /* make sure disable IDMAC and IDMAC_Interrupts */
>>>> + dw_mci_writel(host, (dw_mci_readl(host,
>>>> DWMCI_CONTROL) &
>>>> + ~(DMA_ENABLE | ENABLE_IDMAC)), DWMCI_CONTROL);
>>>> + /* mask all interrupt source of IDMAC */
>>>> + dw_mci_writel(host, 0, DWMCI_IDINTEN);
>>>> + return -1;
>>>> + } else if (mask & INTMSK_DTO) {
>>>> + debug("dwmmc dma interrupt end\n");
>>>> + } else {
>>>> + debug("unexpected condition 0x%x\n", mask);
>>>> + }
>>>> + /* make sure disable IDMAC and IDMAC_Interrupts */
>>>> + dw_mci_writel(host, (dw_mci_readl(host, DWMCI_CONTROL) &
>>>> + ~(DMA_ENABLE | ENABLE_IDMAC)),
>>>> + DWMCI_CONTROL);
>>>> + /* mask all interrupt source of IDMAC */
>>>> + dw_mci_writel(host, 0, DWMCI_IDINTEN);
>>>> + }
>>>> +
>>>> + udelay(100);
>>>> +
>>>> + return 0;
>>>> +}
>>>> +
>>>> +/*
>>>> + * ON/OFF host controller clock
>>>> + *
>>>> + * @param host pointer to dw_mci_host
>>>> + * @param val to enable/disable clock
>>>> + */
>>>> +static void dw_mci_clock_onoff(struct dw_mci_host *host, int val)
>>>> +{
>>>> +
>>>> + if (val)
>>>> + dw_mci_writel(host, CLK_ENABLE, DWMCI_CLKENA);
>>>> + else
>>>> + dw_mci_writel(host, CLK_DISABLE, DWMCI_CLKENA);
>>>> +
>>>> + dw_mci_writel(host, 0, DWMCI_CMD);
>>>> + dw_mci_writel(host, CMD_ONLY_CLK, DWMCI_CMD);
>>>> +}
>>>> +
>>>> +/*
>>>> + * change host controller clock
>>>> + *
>>>> + * @param host pointer to dw_mci_host
>>>> + * @param clock request clock
>>>> + */
>>>> +static void dw_mci_change_clock(struct dw_mci_host *host, uint clock)
>>>> +{
>>>> + int div;
>>>> + u32 sclk_mshc;
>>>> +
>>>> + if (clock == host->clock)
>>>> + return;
>>>> +
>>>> + /* If Input clock is higher than maximum mshc clock */
>>>> + if (clock > MAX_DWMMC_CLOCK) {
>>>> + debug("Input clock is too high\n");
>>>> + clock = MAX_DWMMC_CLOCK;
>>>> + }
>>>> +
>>>> + /* disable the clock before changing it */
>>>> + dw_mci_clock_onoff(host, CLK_DISABLE);
>>>> +
>>>> + /* get the clock division */
>>>> + if (host->peripheral == PERIPH_ID_SDMMC4)
>>>> + sclk_mshc = get_dw_mci_clk_div(host->peripheral) / 2;
>>>> + else
>>>> + sclk_mshc = get_dw_mci_clk_div(host->peripheral) / 4;
>>>> +
>>>> + /* CLKDIV */
>>>> + for (div = 1 ; div <= MAXCLKDIV; div++) {
>>>> + if ((sclk_mshc / (2 * div)) <= clock) {
>>>> + dw_mci_writel(host, div, DWMCI_CLKDIV);
>>>> + break;
>>>> + }
>>>> + }
>>>> +
>>>> + dw_mci_writel(host, 0, DWMCI_CMD);
>>>> + dw_mci_writel(host, CMD_ONLY_CLK, DWMCI_CMD);
>>>> +
>>>> + dw_mci_writel(host, dw_mci_readl(host, DWMCI_CMD) &
>>>> + (~CMD_SEND_CLK_ONLY),
>>>> + DWMCI_CMD);
>>>> +
>>>> + dw_mci_clock_onoff(host, CLK_ENABLE);
>>>> + host->clock = clock;
>>>> +}
>>>> +
>>>> +/*
>>>> + * Set ios for host controller clock
>>>> + *
>>>> + * This sets the card bus width and clksel
>>>> + */
>>>> +static void dw_mci_set_ios(struct mmc *mmc)
>>>> +{
>>>> + struct dw_mci_host *host = mmc->priv;
>>>> + int val;
>>>> +
>>>> + debug("bus_width: %x, clock: %d\n", mmc->bus_width, mmc->clock);
>>>> +
>>>> + if (mmc->clock > 0)
>>>> + dw_mci_change_clock(host, mmc->clock);
>>>> +
>>>> + if (mmc->bus_width == 8)
>>>> + dw_mci_writel(host, PORT0_CARD_WIDTH8, DWMCI_CTYPE);
>>>> + else if (mmc->bus_width == 4)
>>>> + dw_mci_writel(host, PORT0_CARD_WIDTH4, DWMCI_CTYPE);
>>>> + else
>>>> + dw_mci_writel(host, PORT0_CARD_WIDTH1, DWMCI_CTYPE);
>>>> +
>>>> + val = dw_mci_readl(host, DWMCI_CLKSEL);
>>>> + if (host->peripheral == PERIPH_ID_SDMMC0)
>>>> + val |= (SELCLK_SAMPLE_1PHASE_Shift |
>>>> SELCLK_DRV_3PHASE_SHIFT |
>>>> + SELCLK_DIV_RATIO);
>>>> + if (host->peripheral == PERIPH_ID_SDMMC2)
>>>> + val |= (SELCLK_SAMPLE_1PHASE_Shift |
>>>> SELCLK_DRV_2PHASE_SHIFT |
>>>> + SELCLK_DIV_RATIO);
>>>> + if (host->peripheral == PERIPH_ID_SDMMC4)
>>>> + val |= (SELCLK_SAMPLE_1PHASE_Shift |
>>>> SELCLK_DRV_2PHASE_SHIFT);
>>>> +
>>>> + dw_mci_writel(host, val, DWMCI_CLKSEL);
>>>> +}
>>>> +
>>>> +/*
>>>> + * Fifo init for host controller
>>>> + */
>>>> +static void dw_mci_fifo_init(struct dw_mci_host *host)
>>>> +{
>>>> + int fifo_val, fifo_depth, fifo_threshold;
>>>> +
>>>> + fifo_val = dw_mci_readl(host, DWMCI_FIFOTH);
>>>> +
>>>> + /* Power-on value of RX_WMark is FIFO_DEPTH-1 */
>>>> + fifo_depth = 1 + ((fifo_val >> 16) & 0x7ff);
>>>> + fifo_threshold = fifo_depth / 2;
>>>> +
>>>> + fifo_val &= ~(RX_WMARK | TX_WMARK | MSIZE_MASK);
>>>> + fifo_val |= (fifo_threshold | (fifo_threshold << 16) | MSIZE_8);
>>>> + dw_mci_writel(host, fifo_val, DWMCI_FIFOTH);
>>>> +}
>>>> +
>>>> +
>>>> +static int dw_mci_reset(struct dw_mci_host *host)
>>>> +{
>>>> + int err;
>>>> +
>>>> + /* power on the card */
>>>> + dw_mci_writel(host, POWER_ENABLE, DWMCI_PWREN);
>>>> +
>>>> + err = dw_mci_reset_all(host);
>>>> + if (err)
>>>> + return err;
>>>> +
>>>> + dw_mci_fifo_init(host);
>>>> +
>>>> + /* clear all pending interrupts */
>>>> + dw_mci_writel(host, INTMSK_ALL, DWMCI_RINTSTS);
>>>> +
>>>> + /* interrupts are not used, disable all */
>>>> + dw_mci_writel(host, 0, DWMCI_INTMASK);
>>>> +
>>>> + return 0;
>>>> +}
>>>> +
>>>> +static int dw_mci_initialize(struct mmc *mmc)
>>>> +{
>>>> + struct dw_mci_host *host = (struct dw_mci_host *)mmc->priv;
>>>> + unsigned int ier;
>>>> + int err;
>>>> +
>>>> + err = dw_mci_reset(host);
>>>> + if (err)
>>>> + return err;
>>>> +
>>>> + /* enumerate at 400KHz */
>>>> + dw_mci_change_clock(host, MIN_DWMMC_CLOCK);
>>>> +
>>>> + /* set auto stop command */
>>>> + ier = dw_mci_readl(host, DWMCI_CONTROL);
>>>> + ier |= SEND_AS_CCSD;
>>>> + dw_mci_writel(host, ier, DWMCI_CONTROL);
>>>> +
>>>> + /* set 1bit card mode */
>>>> + dw_mci_writel(host, PORT0_CARD_WIDTH1, DWMCI_CTYPE);
>>>> +
>>>> + dw_mci_writel(host, 0xfffff, DWMCI_DEBENCE);
>>>> +
>>>> + /* set bus mode register for IDMAC */
>>>> + dw_mci_writel(host, BMOD_IDMAC_RESET, DWMCI_BMOD);
>>>> +
>>>> + dw_mci_writel(host, 0x0, DWMCI_IDINTEN);
>>>> +
>>>> + /* set the max timeout for data and response */
>>>> + dw_mci_writel(host, TMOUT_MAX, DWMCI_TMOUT);
>>>> +
>>>> + return 0;
>>>> +}
>>>> +
>>>> +int dw_mci_init(enum periph_id periph_id, int bus_width)
>>>> +{
>>>> + struct dw_mci_host *mmc_host;
>>>> + struct mmc *mmc;
>>>> +
>>>> + if (num_devs == MAX_MMC_HOSTS) {
>>>> + debug("%s: Too many hosts\n", __func__);
>>>> + return -1;
>>>> + }
>>>> +
>>>> + /* set the clock for dwmmc controller */
>>>> + if (set_dw_mci_clk_div(periph_id)) {
>>>> + debug("clock_set_dw_mci failed\n");
>>>> + return -EINVAL;
>>>> + }
>>>> +
>>>> + mmc = &dw_mci_dev[num_devs];
>>>> + mmc_host = &dw_mci_host[num_devs];
>>>> +
>>>> + sprintf(mmc->name, "DWMMC%d", num_devs);
>>>> + num_devs++;
>>>> +
>>>> + mmc->priv = mmc_host;
>>>> + mmc->send_cmd = dw_mci_send_command;
>>>> + mmc->set_ios = dw_mci_set_ios;
>>>> + mmc->init = dw_mci_initialize;
>>>> +
>>>> + /*
>>>> + * In 2.40a spec, Data offset is changed.
>>>> + * Need to check the version-id and set data-offset for DATA
>>>> register.
>>>> + */
>>>> + mmc_host->verid = GET_VERID(dw_mci_readl(mmc_host, DWMCI_VERID));
>>>> + debug("Version ID is %04x\n", mmc_host->verid);
>>>> +
>>>> + if (mmc_host->verid < DW_MMC_240A)
>>>> + mmc_host->data_offset = DATA_OFFSET;
>>>> + else
>>>> + mmc_host->data_offset = DATA_240A_OFFSET;
>>>> +
>>>> + mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
>>>> + mmc->host_caps = MMC_MODE_HS_52MHz | MMC_MODE_HS | MMC_MODE_HC;
>>>> +
>>>> + if (bus_width == 8)
>>>> + mmc->host_caps |= MMC_MODE_8BIT;
>>>> + else
>>>> + mmc->host_caps |= MMC_MODE_4BIT;
>>>> +
>>>> + mmc->f_min = MIN_DWMMC_CLOCK;
>>>> + mmc->f_max = MAX_DWMMC_CLOCK;
>>>> +
>>>> + exynos_pinmux_config(periph_id,
>>>> + bus_width == 8 ? PINMUX_FLAG_8BIT_MODE : 0);
>>>> +
>>>> + mmc_host->clock = 0;
>>>> + mmc_host->peripheral = periph_id;
>>>> + mmc_host->ioaddr = (void *)samsung_get_base_dwmmc();
>>>> + mmc->b_max = 1;
>>>> + mmc_register(mmc);
>>>> + mmc->block_dev.removable = 1;
>>>> + debug("dwmmc: periph_id=%d, width=%d, ioaddr=%p\n",
>>>> + periph_id, bus_width, mmc_host->ioaddr);
>>>> +
>>>> + return 0;
>>>> +}
>>>> --
>>>> 1.7.4.4
>>>>
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