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/*
* Marvell MMC/SD/SDIO driver
*
* (C) Copyright 2012
* Marvell Semiconductor <www.marvell.com>
* Written-by: Maen Suleiman, Gerald Kerma
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <malloc.h>
#include <part.h>
#include <mmc.h>
#include <asm/io.h>
#include <asm/arch/cpu.h>
#include <asm/arch/kirkwood.h>
#include <mvebu_mmc.h>
#define DRIVER_NAME "MVEBU_MMC"
static void mvebu_mmc_write(u32 offs, u32 val)
{
writel(val, CONFIG_SYS_MMC_BASE + (offs));
}
static u32 mvebu_mmc_read(u32 offs)
{
return readl(CONFIG_SYS_MMC_BASE + (offs));
}
static int mvebu_mmc_setup_data(struct mmc_data *data)
{
u32 ctrl_reg;
debug("%s, data %s : blocks=%d blksz=%d\n", DRIVER_NAME,
(data->flags & MMC_DATA_READ) ? "read" : "write",
data->blocks, data->blocksize);
/* default to maximum timeout */
ctrl_reg = mvebu_mmc_read(SDIO_HOST_CTRL);
ctrl_reg |= SDIO_HOST_CTRL_TMOUT(SDIO_HOST_CTRL_TMOUT_MAX);
mvebu_mmc_write(SDIO_HOST_CTRL, ctrl_reg);
if (data->flags & MMC_DATA_READ) {
mvebu_mmc_write(SDIO_SYS_ADDR_LOW, (u32)data->dest & 0xffff);
mvebu_mmc_write(SDIO_SYS_ADDR_HI, (u32)data->dest >> 16);
} else {
mvebu_mmc_write(SDIO_SYS_ADDR_LOW, (u32)data->src & 0xffff);
mvebu_mmc_write(SDIO_SYS_ADDR_HI, (u32)data->src >> 16);
}
mvebu_mmc_write(SDIO_BLK_COUNT, data->blocks);
mvebu_mmc_write(SDIO_BLK_SIZE, data->blocksize);
return 0;
}
static int mvebu_mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
struct mmc_data *data)
{
int timeout = 10;
ushort waittype = 0;
ushort resptype = 0;
ushort xfertype = 0;
ushort resp_indx = 0;
debug("cmdidx [0x%x] resp_type[0x%x] cmdarg[0x%x]\n",
cmd->cmdidx, cmd->resp_type, cmd->cmdarg);
udelay(10*1000);
debug("%s: cmd %d (hw state 0x%04x)\n", DRIVER_NAME,
cmd->cmdidx, mvebu_mmc_read(SDIO_HW_STATE));
/* Checking if card is busy */
while ((mvebu_mmc_read(SDIO_HW_STATE) & CARD_BUSY)) {
if (timeout == 0) {
printf("%s: card busy!\n", DRIVER_NAME);
return -1;
}
timeout--;
udelay(1000);
}
/* Set up for a data transfer if we have one */
if (data) {
int err = mvebu_mmc_setup_data(data);
if (err)
return err;
}
resptype = SDIO_CMD_INDEX(cmd->cmdidx);
/* Analyzing resptype/xfertype/waittype for the command */
if (cmd->resp_type & MMC_RSP_BUSY)
resptype |= SDIO_CMD_RSP_48BUSY;
else if (cmd->resp_type & MMC_RSP_136)
resptype |= SDIO_CMD_RSP_136;
else if (cmd->resp_type & MMC_RSP_PRESENT)
resptype |= SDIO_CMD_RSP_48;
else
resptype |= SDIO_CMD_RSP_NONE;
if (cmd->resp_type & MMC_RSP_CRC)
resptype |= SDIO_CMD_CHECK_CMDCRC;
if (cmd->resp_type & MMC_RSP_OPCODE)
resptype |= SDIO_CMD_INDX_CHECK;
if (cmd->resp_type & MMC_RSP_PRESENT) {
resptype |= SDIO_UNEXPECTED_RESP;
waittype |= SDIO_NOR_UNEXP_RSP;
}
if (data) {
resptype |= SDIO_CMD_DATA_PRESENT | SDIO_CMD_CHECK_DATACRC16;
xfertype |= SDIO_XFER_MODE_HW_WR_DATA_EN;
if (data->flags & MMC_DATA_READ) {
xfertype |= SDIO_XFER_MODE_TO_HOST;
waittype = SDIO_NOR_DMA_INI;
} else {
waittype |= SDIO_NOR_XFER_DONE;
}
} else {
waittype |= SDIO_NOR_CMD_DONE;
}
/* Setting cmd arguments */
mvebu_mmc_write(SDIO_ARG_LOW, cmd->cmdarg & 0xffff);
mvebu_mmc_write(SDIO_ARG_HI, cmd->cmdarg >> 16);
/* Setting Xfer mode */
mvebu_mmc_write(SDIO_XFER_MODE, xfertype);
mvebu_mmc_write(SDIO_NOR_INTR_STATUS, ~SDIO_NOR_CARD_INT);
mvebu_mmc_write(SDIO_ERR_INTR_STATUS, SDIO_POLL_MASK);
/* Sending command */
mvebu_mmc_write(SDIO_CMD, resptype);
mvebu_mmc_write(SDIO_NOR_INTR_EN, SDIO_POLL_MASK);
mvebu_mmc_write(SDIO_ERR_INTR_EN, SDIO_POLL_MASK);
/* Waiting for completion */
timeout = 1000000;
while (!((mvebu_mmc_read(SDIO_NOR_INTR_STATUS)) & waittype)) {
if (mvebu_mmc_read(SDIO_NOR_INTR_STATUS) & SDIO_NOR_ERROR) {
debug("%s: error! cmdidx : %d, err reg: %04x\n",
DRIVER_NAME, cmd->cmdidx,
mvebu_mmc_read(SDIO_ERR_INTR_STATUS));
if (mvebu_mmc_read(SDIO_ERR_INTR_STATUS) &
(SDIO_ERR_CMD_TIMEOUT | SDIO_ERR_DATA_TIMEOUT))
return TIMEOUT;
return COMM_ERR;
}
timeout--;
udelay(1);
if (timeout <= 0) {
printf("%s: command timed out\n", DRIVER_NAME);
return TIMEOUT;
}
}
/* Handling response */
if (cmd->resp_type & MMC_RSP_136) {
uint response[8];
for (resp_indx = 0; resp_indx < 8; resp_indx++)
response[resp_indx]
= mvebu_mmc_read(SDIO_RSP(resp_indx));
cmd->response[0] = ((response[0] & 0x03ff) << 22) |
((response[1] & 0xffff) << 6) |
((response[2] & 0xfc00) >> 10);
cmd->response[1] = ((response[2] & 0x03ff) << 22) |
((response[3] & 0xffff) << 6) |
((response[4] & 0xfc00) >> 10);
cmd->response[2] = ((response[4] & 0x03ff) << 22) |
((response[5] & 0xffff) << 6) |
((response[6] & 0xfc00) >> 10);
cmd->response[3] = ((response[6] & 0x03ff) << 22) |
((response[7] & 0x3fff) << 8);
} else if (cmd->resp_type & MMC_RSP_PRESENT) {
uint response[3];
for (resp_indx = 0; resp_indx < 3; resp_indx++)
response[resp_indx]
= mvebu_mmc_read(SDIO_RSP(resp_indx));
cmd->response[0] = ((response[2] & 0x003f) << (8 - 8)) |
((response[1] & 0xffff) << (14 - 8)) |
((response[0] & 0x03ff) << (30 - 8));
cmd->response[1] = ((response[0] & 0xfc00) >> 10);
cmd->response[2] = 0;
cmd->response[3] = 0;
}
debug("%s: resp[0x%x] ", DRIVER_NAME, cmd->resp_type);
debug("[0x%x] ", cmd->response[0]);
debug("[0x%x] ", cmd->response[1]);
debug("[0x%x] ", cmd->response[2]);
debug("[0x%x] ", cmd->response[3]);
debug("\n");
return 0;
}
static void mvebu_mmc_power_up(void)
{
debug("%s: power up\n", DRIVER_NAME);
/* disable interrupts */
mvebu_mmc_write(SDIO_NOR_INTR_EN, 0);
mvebu_mmc_write(SDIO_ERR_INTR_EN, 0);
/* SW reset */
mvebu_mmc_write(SDIO_SW_RESET, SDIO_SW_RESET_NOW);
mvebu_mmc_write(SDIO_XFER_MODE, 0);
/* enable status */
mvebu_mmc_write(SDIO_NOR_STATUS_EN, SDIO_POLL_MASK);
mvebu_mmc_write(SDIO_ERR_STATUS_EN, SDIO_POLL_MASK);
/* enable interrupts status */
mvebu_mmc_write(SDIO_NOR_INTR_STATUS, SDIO_POLL_MASK);
mvebu_mmc_write(SDIO_ERR_INTR_STATUS, SDIO_POLL_MASK);
}
static void mvebu_mmc_set_clk(unsigned int clock)
{
unsigned int m;
if (clock == 0) {
debug("%s: clock off\n", DRIVER_NAME);
mvebu_mmc_write(SDIO_XFER_MODE, SDIO_XFER_MODE_STOP_CLK);
mvebu_mmc_write(SDIO_CLK_DIV, MVEBU_MMC_BASE_DIV_MAX);
} else {
m = MVEBU_MMC_BASE_FAST_CLOCK/(2*clock) - 1;
if (m > MVEBU_MMC_BASE_DIV_MAX)
m = MVEBU_MMC_BASE_DIV_MAX;
mvebu_mmc_write(SDIO_CLK_DIV, m & MVEBU_MMC_BASE_DIV_MAX);
}
udelay(10*1000);
}
static void mvebu_mmc_set_bus(unsigned int bus)
{
u32 ctrl_reg = 0;
ctrl_reg = mvebu_mmc_read(SDIO_HOST_CTRL);
ctrl_reg &= ~SDIO_HOST_CTRL_DATA_WIDTH_4_BITS;
switch (bus) {
case 4:
ctrl_reg |= SDIO_HOST_CTRL_DATA_WIDTH_4_BITS;
break;
case 1:
default:
ctrl_reg |= SDIO_HOST_CTRL_DATA_WIDTH_1_BIT;
}
/* default transfer mode */
ctrl_reg |= SDIO_HOST_CTRL_BIG_ENDIAN;
ctrl_reg &= ~SDIO_HOST_CTRL_LSB_FIRST;
/* default to maximum timeout */
ctrl_reg |= SDIO_HOST_CTRL_TMOUT(SDIO_HOST_CTRL_TMOUT_MAX);
ctrl_reg |= SDIO_HOST_CTRL_PUSH_PULL_EN;
ctrl_reg |= SDIO_HOST_CTRL_CARD_TYPE_MEM_ONLY;
debug("%s: ctrl 0x%04x: %s %s %s\n", DRIVER_NAME, ctrl_reg,
(ctrl_reg & SDIO_HOST_CTRL_PUSH_PULL_EN) ?
"push-pull" : "open-drain",
(ctrl_reg & SDIO_HOST_CTRL_DATA_WIDTH_4_BITS) ?
"4bit-width" : "1bit-width",
(ctrl_reg & SDIO_HOST_CTRL_HI_SPEED_EN) ?
"high-speed" : "");
mvebu_mmc_write(SDIO_HOST_CTRL, ctrl_reg);
udelay(10*1000);
}
static void mvebu_mmc_set_ios(struct mmc *mmc)
{
debug("%s: bus[%d] clock[%d]\n", DRIVER_NAME,
mmc->bus_width, mmc->clock);
mvebu_mmc_set_bus(mmc->bus_width);
mvebu_mmc_set_clk(mmc->clock);
}
static int mvebu_mmc_initialize(struct mmc *mmc)
{
debug("%s: mvebu_mmc_initialize", DRIVER_NAME);
/*
* Setting host parameters
* Initial Host Ctrl : Timeout : max , Normal Speed mode,
* 4-bit data mode, Big Endian, SD memory Card, Push_pull CMD Line
*/
mvebu_mmc_write(SDIO_HOST_CTRL,
SDIO_HOST_CTRL_TMOUT(SDIO_HOST_CTRL_TMOUT_MAX) |
SDIO_HOST_CTRL_DATA_WIDTH_4_BITS |
SDIO_HOST_CTRL_BIG_ENDIAN |
SDIO_HOST_CTRL_PUSH_PULL_EN |
SDIO_HOST_CTRL_CARD_TYPE_MEM_ONLY);
mvebu_mmc_write(SDIO_CLK_CTRL, 0);
/* enable status */
mvebu_mmc_write(SDIO_NOR_STATUS_EN, SDIO_POLL_MASK);
mvebu_mmc_write(SDIO_ERR_STATUS_EN, SDIO_POLL_MASK);
/* disable interrupts */
mvebu_mmc_write(SDIO_NOR_INTR_EN, 0);
mvebu_mmc_write(SDIO_ERR_INTR_EN, 0);
/* SW reset */
mvebu_mmc_write(SDIO_SW_RESET, SDIO_SW_RESET_NOW);
udelay(10*1000);
return 0;
}
static const struct mmc_ops mvebu_mmc_ops = {
.send_cmd = mvebu_mmc_send_cmd,
.set_ios = mvebu_mmc_set_ios,
.init = mvebu_mmc_initialize,
};
static struct mmc_config mvebu_mmc_cfg = {
.name = DRIVER_NAME,
.ops = &mvebu_mmc_ops,
.f_min = MVEBU_MMC_BASE_FAST_CLOCK / MVEBU_MMC_BASE_DIV_MAX,
.f_max = MVEBU_MMC_CLOCKRATE_MAX,
.voltages = MMC_VDD_32_33 | MMC_VDD_33_34,
.host_caps = MMC_MODE_4BIT | MMC_MODE_HS,
.part_type = PART_TYPE_DOS,
.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT,
};
int mvebu_mmc_init(bd_t *bis)
{
struct mmc *mmc;
mvebu_mmc_power_up();
mmc = mmc_create(&mvebu_mmc_cfg, bis);
if (mmc == NULL)
return -1;
return 0;
}
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