#include <linux/kernel.h>
#include <linux/mmc/core.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include <linux/scatterlist.h>
#include <linux/workqueue.h>
#include <linux/greybus.h>
#include "gbphy.h"
struct gb_sdio_host {
struct gb_connection *connection;
struct gbphy_device *gbphy_dev;
struct mmc_host *mmc;
struct mmc_request *mrq;
struct mutex lock;
size_t data_max;
spinlock_t xfer;
bool xfer_stop;
struct workqueue_struct *mrq_workqueue;
struct work_struct mrqwork;
u8 queued_events;
bool removed;
bool card_present;
bool read_only;
};
#define GB_SDIO_RSP_R1_R5_R6_R7 (GB_SDIO_RSP_PRESENT | GB_SDIO_RSP_CRC | \
GB_SDIO_RSP_OPCODE)
#define GB_SDIO_RSP_R3_R4 (GB_SDIO_RSP_PRESENT)
#define GB_SDIO_RSP_R2 (GB_SDIO_RSP_PRESENT | GB_SDIO_RSP_CRC | \
GB_SDIO_RSP_136)
#define GB_SDIO_RSP_R1B (GB_SDIO_RSP_PRESENT | GB_SDIO_RSP_CRC | \
GB_SDIO_RSP_OPCODE | GB_SDIO_RSP_BUSY)
#define GB_SDIO_VDD_SHIFT 8
#ifndef MMC_CAP2_CORE_RUNTIME_PM
#define MMC_CAP2_CORE_RUNTIME_PM 0
#endif
static inline bool single_op(struct mmc_command *cmd)
{
u32 opcode = cmd->opcode;
return opcode == MMC_WRITE_BLOCK ||
opcode == MMC_READ_SINGLE_BLOCK;
}
static void _gb_sdio_set_host_caps(struct gb_sdio_host *host, u32 r)
{
u32 caps = 0;
u32 caps2 = 0;
caps = ((r & GB_SDIO_CAP_NONREMOVABLE) ? MMC_CAP_NONREMOVABLE : 0) |
((r & GB_SDIO_CAP_4_BIT_DATA) ? MMC_CAP_4_BIT_DATA : 0) |
((r & GB_SDIO_CAP_8_BIT_DATA) ? MMC_CAP_8_BIT_DATA : 0) |
((r & GB_SDIO_CAP_MMC_HS) ? MMC_CAP_MMC_HIGHSPEED : 0) |
((r & GB_SDIO_CAP_SD_HS) ? MMC_CAP_SD_HIGHSPEED : 0) |
((r & GB_SDIO_CAP_1_2V_DDR) ? MMC_CAP_1_2V_DDR : 0) |
((r & GB_SDIO_CAP_1_8V_DDR) ? MMC_CAP_1_8V_DDR : 0) |
((r & GB_SDIO_CAP_POWER_OFF_CARD) ? MMC_CAP_POWER_OFF_CARD : 0) |
((r & GB_SDIO_CAP_UHS_SDR12) ? MMC_CAP_UHS_SDR12 : 0) |
((r & GB_SDIO_CAP_UHS_SDR25) ? MMC_CAP_UHS_SDR25 : 0) |
((r & GB_SDIO_CAP_UHS_SDR50) ? MMC_CAP_UHS_SDR50 : 0) |
((r & GB_SDIO_CAP_UHS_SDR104) ? MMC_CAP_UHS_SDR104 : 0) |
((r & GB_SDIO_CAP_UHS_DDR50) ? MMC_CAP_UHS_DDR50 : 0) |
((r & GB_SDIO_CAP_DRIVER_TYPE_A) ? MMC_CAP_DRIVER_TYPE_A : 0) |
((r & GB_SDIO_CAP_DRIVER_TYPE_C) ? MMC_CAP_DRIVER_TYPE_C : 0) |
((r & GB_SDIO_CAP_DRIVER_TYPE_D) ? MMC_CAP_DRIVER_TYPE_D : 0);
caps2 = ((r & GB_SDIO_CAP_HS200_1_2V) ? MMC_CAP2_HS200_1_2V_SDR : 0) |
((r & GB_SDIO_CAP_HS400_1_2V) ? MMC_CAP2_HS400_1_2V : 0) |
((r & GB_SDIO_CAP_HS400_1_8V) ? MMC_CAP2_HS400_1_8V : 0) |
((r & GB_SDIO_CAP_HS200_1_8V) ? MMC_CAP2_HS200_1_8V_SDR : 0);
host->mmc->caps = caps;
host->mmc->caps2 = caps2 | MMC_CAP2_CORE_RUNTIME_PM;
if (caps & MMC_CAP_NONREMOVABLE)
host->card_present = true;
}
static u32 _gb_sdio_get_host_ocr(u32 ocr)
{
return (((ocr & GB_SDIO_VDD_165_195) ? MMC_VDD_165_195 : 0) |
((ocr & GB_SDIO_VDD_20_21) ? MMC_VDD_20_21 : 0) |
((ocr & GB_SDIO_VDD_21_22) ? MMC_VDD_21_22 : 0) |
((ocr & GB_SDIO_VDD_22_23) ? MMC_VDD_22_23 : 0) |
((ocr & GB_SDIO_VDD_23_24) ? MMC_VDD_23_24 : 0) |
((ocr & GB_SDIO_VDD_24_25) ? MMC_VDD_24_25 : 0) |
((ocr & GB_SDIO_VDD_25_26) ? MMC_VDD_25_26 : 0) |
((ocr & GB_SDIO_VDD_26_27) ? MMC_VDD_26_27 : 0) |
((ocr & GB_SDIO_VDD_27_28) ? MMC_VDD_27_28 : 0) |
((ocr & GB_SDIO_VDD_28_29) ? MMC_VDD_28_29 : 0) |
((ocr & GB_SDIO_VDD_29_30) ? MMC_VDD_29_30 : 0) |
((ocr & GB_SDIO_VDD_30_31) ? MMC_VDD_30_31 : 0) |
((ocr & GB_SDIO_VDD_31_32) ? MMC_VDD_31_32 : 0) |
((ocr & GB_SDIO_VDD_32_33) ? MMC_VDD_32_33 : 0) |
((ocr & GB_SDIO_VDD_33_34) ? MMC_VDD_33_34 : 0) |
((ocr & GB_SDIO_VDD_34_35) ? MMC_VDD_34_35 : 0) |
((ocr & GB_SDIO_VDD_35_36) ? MMC_VDD_35_36 : 0)
);
}
static int gb_sdio_get_caps(struct gb_sdio_host *host)
{
struct gb_sdio_get_caps_response response;
struct mmc_host *mmc = host->mmc;
u16 data_max;
u32 blksz;
u32 ocr;
u32 r;
int ret;
ret = gb_operation_sync(host->connection, GB_SDIO_TYPE_GET_CAPABILITIES,
NULL, 0, &response, sizeof(response));
if (ret < 0)
return ret;
r = le32_to_cpu(response.caps);
_gb_sdio_set_host_caps(host, r);
data_max = gb_operation_get_payload_size_max(host->connection);
data_max = min(data_max - sizeof(struct gb_sdio_transfer_request),
data_max - sizeof(struct gb_sdio_transfer_response));
blksz = min_t(u16, le16_to_cpu(response.max_blk_size), data_max);
blksz = max_t(u32, 512, blksz);
mmc->max_blk_size = rounddown_pow_of_two(blksz);
mmc->max_blk_count = le16_to_cpu(response.max_blk_count);
host->data_max = data_max;
ocr = _gb_sdio_get_host_ocr(le32_to_cpu(response.ocr));
mmc->ocr_avail = ocr;
mmc->ocr_avail_sdio = mmc->ocr_avail;
mmc->ocr_avail_sd = mmc->ocr_avail;
mmc->ocr_avail_mmc = mmc->ocr_avail;
mmc->f_min = le32_to_cpu(response.f_min);
mmc->f_max = le32_to_cpu(response.f_max);
return 0;
}
static void _gb_queue_event(struct gb_sdio_host *host, u8 event)
{
if (event & GB_SDIO_CARD_INSERTED)
host->queued_events &= ~GB_SDIO_CARD_REMOVED;
else if (event & GB_SDIO_CARD_REMOVED)
host->queued_events &= ~GB_SDIO_CARD_INSERTED;
host->queued_events |= event;
}
static int _gb_sdio_process_events(struct gb_sdio_host *host, u8 event)
{
u8 state_changed = 0;
if (event & GB_SDIO_CARD_INSERTED) {
if (host->mmc->caps & MMC_CAP_NONREMOVABLE)
return 0;
if (host->card_present)
return 0;
host->card_present = true;
state_changed = 1;
}
if (event & GB_SDIO_CARD_REMOVED) {
if (host->mmc->caps & MMC_CAP_NONREMOVABLE)
return 0;
if (!(host->card_present))
return 0;
host->card_present = false;
state_changed = 1;
}
if (event & GB_SDIO_WP)
host->read_only = true;
if (state_changed) {
dev_info(mmc_dev(host->mmc), "card %s now event\n",
(host->card_present ? "inserted" : "removed"));
mmc_detect_change(host->mmc, 0);
}
return 0;
}
static int gb_sdio_request_handler(struct gb_operation *op)
{
struct gb_sdio_host *host = gb_connection_get_data(op->connection);
struct gb_message *request;
struct gb_sdio_event_request *payload;
u8 type = op->type;
int ret = 0;
u8 event;
if (type != GB_SDIO_TYPE_EVENT) {
dev_err(mmc_dev(host->mmc),
"unsupported unsolicited event: %u\n", type);
return -EINVAL;
}
request = op->request;
if (request->payload_size < sizeof(*payload)) {
dev_err(mmc_dev(host->mmc), "wrong event size received (%zu < %zu)\n",
request->payload_size, sizeof(*payload));
return -EINVAL;
}
payload = request->payload;
event = payload->event;
if (host->removed)
_gb_queue_event(host, event);
else
ret = _gb_sdio_process_events(host, event);
return ret;
}
static int gb_sdio_set_ios(struct gb_sdio_host *host,
struct gb_sdio_set_ios_request *request)
{
int ret;
ret = gbphy_runtime_get_sync(host->gbphy_dev);
if (ret)
return ret;
ret = gb_operation_sync(host->connection, GB_SDIO_TYPE_SET_IOS, request,
sizeof(*request), NULL, 0);
gbphy_runtime_put_autosuspend(host->gbphy_dev);
return ret;
}
static int _gb_sdio_send(struct gb_sdio_host *host, struct mmc_data *data,
size_t len, u16 nblocks, off_t skip)
{
struct gb_sdio_transfer_request *request;
struct gb_sdio_transfer_response *response;
struct gb_operation *operation;
struct scatterlist *sg = data->sg;
unsigned int sg_len = data->sg_len;
size_t copied;
u16 send_blksz;
u16 send_blocks;
int ret;
WARN_ON(len > host->data_max);
operation = gb_operation_create(host->connection, GB_SDIO_TYPE_TRANSFER,
len + sizeof(*request),
sizeof(*response), GFP_KERNEL);
if (!operation)
return -ENOMEM;
request = operation->request->payload;
request->data_flags = data->flags >> 8;
request->data_blocks = cpu_to_le16(nblocks);
request->data_blksz = cpu_to_le16(data->blksz);
copied = sg_pcopy_to_buffer(sg, sg_len, &request->data[0], len, skip);
if (copied != len) {
ret = -EINVAL;
goto err_put_operation;
}
ret = gb_operation_request_send_sync(operation);
if (ret < 0)
goto err_put_operation;
response = operation->response->payload;
send_blocks = le16_to_cpu(response->data_blocks);
send_blksz = le16_to_cpu(response->data_blksz);
if (len != send_blksz * send_blocks) {
dev_err(mmc_dev(host->mmc), "send: size received: %zu != %d\n",
len, send_blksz * send_blocks);
ret = -EINVAL;
}
err_put_operation:
gb_operation_put(operation);
return ret;
}
static int _gb_sdio_recv(struct gb_sdio_host *host, struct mmc_data *data,
size_t len, u16 nblocks, off_t skip)
{
struct gb_sdio_transfer_request *request;
struct gb_sdio_transfer_response *response;
struct gb_operation *operation;
struct scatterlist *sg = data->sg;
unsigned int sg_len = data->sg_len;
size_t copied;
u16 recv_blksz;
u16 recv_blocks;
int ret;
WARN_ON(len > host->data_max);
operation = gb_operation_create(host->connection, GB_SDIO_TYPE_TRANSFER,
sizeof(*request),
len + sizeof(*response), GFP_KERNEL);
if (!operation)
return -ENOMEM;
request = operation->request->payload;
request->data_flags = data->flags >> 8;
request->data_blocks = cpu_to_le16(nblocks);
request->data_blksz = cpu_to_le16(data->blksz);
ret = gb_operation_request_send_sync(operation);
if (ret < 0)
goto err_put_operation;
response = operation->response->payload;
recv_blocks = le16_to_cpu(response->data_blocks);
recv_blksz = le16_to_cpu(response->data_blksz);
if (len != recv_blksz * recv_blocks) {
dev_err(mmc_dev(host->mmc), "recv: size received: %d != %zu\n",
recv_blksz * recv_blocks, len);
ret = -EINVAL;
goto err_put_operation;
}
copied = sg_pcopy_from_buffer(sg, sg_len, &response->data[0], len,
skip);
if (copied != len)
ret = -EINVAL;
err_put_operation:
gb_operation_put(operation);
return ret;
}
static int gb_sdio_transfer(struct gb_sdio_host *host, struct mmc_data *data)
{
size_t left, len;
off_t skip = 0;
int ret = 0;
u16 nblocks;
if (single_op(data->mrq->cmd) && data->blocks > 1) {
ret = -ETIMEDOUT;
goto out;
}
left = data->blksz * data->blocks;
while (left) {
spin_lock(&host->xfer);
if (host->xfer_stop) {
host->xfer_stop = false;
spin_unlock(&host->xfer);
ret = -EINTR;
goto out;
}
spin_unlock(&host->xfer);
len = min(left, host->data_max);
nblocks = len / data->blksz;
len = nblocks * data->blksz;
if (data->flags & MMC_DATA_READ) {
ret = _gb_sdio_recv(host, data, len, nblocks, skip);
if (ret < 0)
goto out;
} else {
ret = _gb_sdio_send(host, data, len, nblocks, skip);
if (ret < 0)
goto out;
}
data->bytes_xfered += len;
left -= len;
skip += len;
}
out:
data->error = ret;
return ret;
}
static int gb_sdio_command(struct gb_sdio_host *host, struct mmc_command *cmd)
{
struct gb_sdio_command_request request = {0};
struct gb_sdio_command_response response;
struct mmc_data *data = host->mrq->data;
unsigned int timeout_ms;
u8 cmd_flags;
u8 cmd_type;
int i;
int ret;
switch (mmc_resp_type(cmd)) {
case MMC_RSP_NONE:
cmd_flags = GB_SDIO_RSP_NONE;
break;
case MMC_RSP_R1:
cmd_flags = GB_SDIO_RSP_R1_R5_R6_R7;
break;
case MMC_RSP_R1B:
cmd_flags = GB_SDIO_RSP_R1B;
break;
case MMC_RSP_R2:
cmd_flags = GB_SDIO_RSP_R2;
break;
case MMC_RSP_R3:
cmd_flags = GB_SDIO_RSP_R3_R4;
break;
default:
dev_err(mmc_dev(host->mmc), "cmd flag invalid 0x%04x\n",
mmc_resp_type(cmd));
ret = -EINVAL;
goto out;
}
switch (mmc_cmd_type(cmd)) {
case MMC_CMD_BC:
cmd_type = GB_SDIO_CMD_BC;
break;
case MMC_CMD_BCR:
cmd_type = GB_SDIO_CMD_BCR;
break;
case MMC_CMD_AC:
cmd_type = GB_SDIO_CMD_AC;
break;
case MMC_CMD_ADTC:
cmd_type = GB_SDIO_CMD_ADTC;
break;
default:
dev_err(mmc_dev(host->mmc), "cmd type invalid 0x%04x\n",
mmc_cmd_type(cmd));
ret = -EINVAL;
goto out;
}
request.cmd = cmd->opcode;
request.cmd_flags = cmd_flags;
request.cmd_type = cmd_type;
request.cmd_arg = cpu_to_le32(cmd->arg);
if (data) {
request.data_blocks = cpu_to_le16(data->blocks);
request.data_blksz = cpu_to_le16(data->blksz);
}
timeout_ms = cmd->busy_timeout ? cmd->busy_timeout :
GB_OPERATION_TIMEOUT_DEFAULT;
ret = gb_operation_sync_timeout(host->connection, GB_SDIO_TYPE_COMMAND,
&request, sizeof(request), &response,
sizeof(response), timeout_ms);
if (ret < 0)
goto out;
if (cmd_flags == GB_SDIO_RSP_NONE)
goto out;
if (cmd_flags & GB_SDIO_RSP_R2)
for (i = 0; i < 4; i++)
cmd->resp[i] = le32_to_cpu(response.resp[i]);
else
cmd->resp[0] = le32_to_cpu(response.resp[0]);
out:
cmd->error = ret;
return ret;
}
static void gb_sdio_mrq_work(struct work_struct *work)
{
struct gb_sdio_host *host;
struct mmc_request *mrq;
int ret;
host = container_of(work, struct gb_sdio_host, mrqwork);
ret = gbphy_runtime_get_sync(host->gbphy_dev);
if (ret)
return;
mutex_lock(&host->lock);
mrq = host->mrq;
if (!mrq) {
mutex_unlock(&host->lock);
gbphy_runtime_put_autosuspend(host->gbphy_dev);
dev_err(mmc_dev(host->mmc), "mmc request is NULL");
return;
}
if (host->removed) {
mrq->cmd->error = -ESHUTDOWN;
goto done;
}
if (mrq->sbc) {
ret = gb_sdio_command(host, mrq->sbc);
if (ret < 0)
goto done;
}
ret = gb_sdio_command(host, mrq->cmd);
if (ret < 0)
goto done;
if (mrq->data) {
ret = gb_sdio_transfer(host, mrq->data);
if (ret < 0)
goto done;
}
if (mrq->stop) {
ret = gb_sdio_command(host, mrq->stop);
if (ret < 0)
goto done;
}
done:
host->mrq = NULL;
mutex_unlock(&host->lock);
mmc_request_done(host->mmc, mrq);
gbphy_runtime_put_autosuspend(host->gbphy_dev);
}
static void gb_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct gb_sdio_host *host = mmc_priv(mmc);
struct mmc_command *cmd = mrq->cmd;
if (cmd->opcode == MMC_STOP_TRANSMISSION) {
spin_lock(&host->xfer);
host->xfer_stop = true;
spin_unlock(&host->xfer);
}
mutex_lock(&host->lock);
WARN_ON(host->mrq);
host->mrq = mrq;
if (host->removed) {
mrq->cmd->error = -ESHUTDOWN;
goto out;
}
if (!host->card_present) {
mrq->cmd->error = -ENOMEDIUM;
goto out;
}
queue_work(host->mrq_workqueue, &host->mrqwork);
mutex_unlock(&host->lock);
return;
out:
host->mrq = NULL;
mutex_unlock(&host->lock);
mmc_request_done(mmc, mrq);
}
static void gb_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct gb_sdio_host *host = mmc_priv(mmc);
struct gb_sdio_set_ios_request request;
int ret;
u8 power_mode;
u8 bus_width;
u8 timing;
u8 signal_voltage;
u8 drv_type;
u32 vdd = 0;
mutex_lock(&host->lock);
request.clock = cpu_to_le32(ios->clock);
if (ios->vdd)
vdd = 1 << (ios->vdd - GB_SDIO_VDD_SHIFT);
request.vdd = cpu_to_le32(vdd);
request.bus_mode = ios->bus_mode == MMC_BUSMODE_OPENDRAIN ?
GB_SDIO_BUSMODE_OPENDRAIN :
GB_SDIO_BUSMODE_PUSHPULL;
switch (ios->power_mode) {
case MMC_POWER_OFF:
default:
power_mode = GB_SDIO_POWER_OFF;
break;
case MMC_POWER_UP:
power_mode = GB_SDIO_POWER_UP;
break;
case MMC_POWER_ON:
power_mode = GB_SDIO_POWER_ON;
break;
case MMC_POWER_UNDEFINED:
power_mode = GB_SDIO_POWER_UNDEFINED;
break;
}
request.power_mode = power_mode;
switch (ios->bus_width) {
case MMC_BUS_WIDTH_1:
bus_width = GB_SDIO_BUS_WIDTH_1;
break;
case MMC_BUS_WIDTH_4:
default:
bus_width = GB_SDIO_BUS_WIDTH_4;
break;
case MMC_BUS_WIDTH_8:
bus_width = GB_SDIO_BUS_WIDTH_8;
break;
}
request.bus_width = bus_width;
switch (ios->timing) {
case MMC_TIMING_LEGACY:
default:
timing = GB_SDIO_TIMING_LEGACY;
break;
case MMC_TIMING_MMC_HS:
timing = GB_SDIO_TIMING_MMC_HS;
break;
case MMC_TIMING_SD_HS:
timing = GB_SDIO_TIMING_SD_HS;
break;
case MMC_TIMING_UHS_SDR12:
timing = GB_SDIO_TIMING_UHS_SDR12;
break;
case MMC_TIMING_UHS_SDR25:
timing = GB_SDIO_TIMING_UHS_SDR25;
break;
case MMC_TIMING_UHS_SDR50:
timing = GB_SDIO_TIMING_UHS_SDR50;
break;
case MMC_TIMING_UHS_SDR104:
timing = GB_SDIO_TIMING_UHS_SDR104;
break;
case MMC_TIMING_UHS_DDR50:
timing = GB_SDIO_TIMING_UHS_DDR50;
break;
case MMC_TIMING_MMC_DDR52:
timing = GB_SDIO_TIMING_MMC_DDR52;
break;
case MMC_TIMING_MMC_HS200:
timing = GB_SDIO_TIMING_MMC_HS200;
break;
case MMC_TIMING_MMC_HS400:
timing = GB_SDIO_TIMING_MMC_HS400;
break;
}
request.timing = timing;
switch (ios->signal_voltage) {
case MMC_SIGNAL_VOLTAGE_330:
signal_voltage = GB_SDIO_SIGNAL_VOLTAGE_330;
break;
case MMC_SIGNAL_VOLTAGE_180:
default:
signal_voltage = GB_SDIO_SIGNAL_VOLTAGE_180;
break;
case MMC_SIGNAL_VOLTAGE_120:
signal_voltage = GB_SDIO_SIGNAL_VOLTAGE_120;
break;
}
request.signal_voltage = signal_voltage;
switch (ios->drv_type) {
case MMC_SET_DRIVER_TYPE_A:
drv_type = GB_SDIO_SET_DRIVER_TYPE_A;
break;
case MMC_SET_DRIVER_TYPE_C:
drv_type = GB_SDIO_SET_DRIVER_TYPE_C;
break;
case MMC_SET_DRIVER_TYPE_D:
drv_type = GB_SDIO_SET_DRIVER_TYPE_D;
break;
case MMC_SET_DRIVER_TYPE_B:
default:
drv_type = GB_SDIO_SET_DRIVER_TYPE_B;
break;
}
request.drv_type = drv_type;
ret = gb_sdio_set_ios(host, &request);
if (ret < 0)
goto out;
memcpy(&mmc->ios, ios, sizeof(mmc->ios));
out:
mutex_unlock(&host->lock);
}
static int gb_mmc_get_ro(struct mmc_host *mmc)
{
struct gb_sdio_host *host = mmc_priv(mmc);
mutex_lock(&host->lock);
if (host->removed) {
mutex_unlock(&host->lock);
return -ESHUTDOWN;
}
mutex_unlock(&host->lock);
return host->read_only;
}
static int gb_mmc_get_cd(struct mmc_host *mmc)
{
struct gb_sdio_host *host = mmc_priv(mmc);
mutex_lock(&host->lock);
if (host->removed) {
mutex_unlock(&host->lock);
return -ESHUTDOWN;
}
mutex_unlock(&host->lock);
return host->card_present;
}
static int gb_mmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
{
return 0;
}
static const struct mmc_host_ops gb_sdio_ops = {
.request = gb_mmc_request,
.set_ios = gb_mmc_set_ios,
.get_ro = gb_mmc_get_ro,
.get_cd = gb_mmc_get_cd,
.start_signal_voltage_switch = gb_mmc_switch_voltage,
};
static int gb_sdio_probe(struct gbphy_device *gbphy_dev,
const struct gbphy_device_id *id)
{
struct gb_connection *connection;
struct mmc_host *mmc;
struct gb_sdio_host *host;
int ret = 0;
mmc = mmc_alloc_host(sizeof(*host), &gbphy_dev->dev);
if (!mmc)
return -ENOMEM;
connection = gb_connection_create(gbphy_dev->bundle,
le16_to_cpu(gbphy_dev->cport_desc->id),
gb_sdio_request_handler);
if (IS_ERR(connection)) {
ret = PTR_ERR(connection);
goto exit_mmc_free;
}
host = mmc_priv(mmc);
host->mmc = mmc;
host->removed = true;
host->connection = connection;
gb_connection_set_data(connection, host);
host->gbphy_dev = gbphy_dev;
gb_gbphy_set_data(gbphy_dev, host);
ret = gb_connection_enable_tx(connection);
if (ret)
goto exit_connection_destroy;
ret = gb_sdio_get_caps(host);
if (ret < 0)
goto exit_connection_disable;
mmc->ops = &gb_sdio_ops;
mmc->max_segs = host->mmc->max_blk_count;
mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
mmc->max_seg_size = mmc->max_req_size;
mutex_init(&host->lock);
spin_lock_init(&host->xfer);
host->mrq_workqueue = alloc_workqueue("mmc-%s", WQ_PERCPU, 1,
dev_name(&gbphy_dev->dev));
if (!host->mrq_workqueue) {
ret = -ENOMEM;
goto exit_connection_disable;
}
INIT_WORK(&host->mrqwork, gb_sdio_mrq_work);
ret = gb_connection_enable(connection);
if (ret)
goto exit_wq_destroy;
ret = mmc_add_host(mmc);
if (ret < 0)
goto exit_wq_destroy;
host->removed = false;
ret = _gb_sdio_process_events(host, host->queued_events);
host->queued_events = 0;
gbphy_runtime_put_autosuspend(gbphy_dev);
return ret;
exit_wq_destroy:
destroy_workqueue(host->mrq_workqueue);
exit_connection_disable:
gb_connection_disable(connection);
exit_connection_destroy:
gb_connection_destroy(connection);
exit_mmc_free:
mmc_free_host(mmc);
return ret;
}
static void gb_sdio_remove(struct gbphy_device *gbphy_dev)
{
struct gb_sdio_host *host = gb_gbphy_get_data(gbphy_dev);
struct gb_connection *connection = host->connection;
struct mmc_host *mmc;
int ret;
ret = gbphy_runtime_get_sync(gbphy_dev);
if (ret)
gbphy_runtime_get_noresume(gbphy_dev);
mutex_lock(&host->lock);
host->removed = true;
mmc = host->mmc;
gb_connection_set_data(connection, NULL);
mutex_unlock(&host->lock);
destroy_workqueue(host->mrq_workqueue);
gb_connection_disable_rx(connection);
mmc_remove_host(mmc);
gb_connection_disable(connection);
gb_connection_destroy(connection);
mmc_free_host(mmc);
}
static const struct gbphy_device_id gb_sdio_id_table[] = {
{ GBPHY_PROTOCOL(GREYBUS_PROTOCOL_SDIO) },
{ },
};
MODULE_DEVICE_TABLE(gbphy, gb_sdio_id_table);
static struct gbphy_driver sdio_driver = {
.name = "sdio",
.probe = gb_sdio_probe,
.remove = gb_sdio_remove,
.id_table = gb_sdio_id_table,
};
module_gbphy_driver(sdio_driver);
MODULE_DESCRIPTION("SD/MMC Greybus driver");
MODULE_LICENSE("GPL v2");
