[patch v2 02/16] MMC: S3C24XX: Fix the checkpatch.pl errors in the s3cmci driver

From: Ben Dooks
Date: Mon Jun 16 2008 - 10:37:49 EST

Fix the checkpatch and other problems pointed out by
akpm.

Signed-off-by: Ben Dooks <ben-linux@xxxxxxxxx>

Index: linux-2.6.26-rc5-q2/drivers/mmc/host/s3cmci.c
===================================================================
--- linux-2.6.26-rc5-q2.orig/drivers/mmc/host/s3cmci.c 2008-06-07 12:25:20.000000000 +0100
+++ linux-2.6.26-rc5-q2/drivers/mmc/host/s3cmci.c 2008-06-16 15:18:13.000000000 +0100
@@ -15,11 +15,10 @@
#include <linux/mmc/host.h>
#include <linux/platform_device.h>
#include <linux/irq.h>
+#include <linux/io.h>

#include <asm/dma.h>
-#include <asm/dma-mapping.h>

-#include <asm/io.h>
#include <asm/arch/regs-sdi.h>
#include <asm/arch/regs-gpio.h>

@@ -43,13 +42,15 @@ static const int dbgmap_err = dbg_err
static const int dbgmap_info = dbg_info | dbg_conf;
static const int dbgmap_debug = dbg_debug;

-#define dbg(host, channels, args...) \
- if (dbgmap_err & channels) \
- dev_err(&host->pdev->dev, args); \
- else if (dbgmap_info & channels) \
- dev_info(&host->pdev->dev, args);\
- else if (dbgmap_debug & channels) \
- dev_dbg(&host->pdev->dev, args);
+#define dbg(host, channels, args...) \
+ do { \
+ if (dbgmap_err & channels) \
+ dev_err(&host->pdev->dev, args); \
+ else if (dbgmap_info & channels) \
+ dev_info(&host->pdev->dev, args); \
+ else if (dbgmap_debug & channels) \
+ dev_dbg(&host->pdev->dev, args); \
+ } while (0)

#define RESSIZE(ressource) (((ressource)->end - (ressource)->start)+1)

@@ -63,7 +64,7 @@ static void s3cmci_reset(struct s3cmci_h

#ifdef CONFIG_MMC_DEBUG

-static inline void dbg_dumpregs(struct s3cmci_host *host, char *prefix)
+static void dbg_dumpregs(struct s3cmci_host *host, char *prefix)
{
u32 con, pre, cmdarg, cmdcon, cmdsta, r0, r1, r2, r3, timer, bsize;
u32 datcon, datcnt, datsta, fsta, imask;
@@ -103,17 +104,17 @@ static inline void dbg_dumpregs(struct s
static void prepare_dbgmsg(struct s3cmci_host *host, struct mmc_command *cmd,
int stop)
{
- snprintf(host->dbgmsg_cmd, 300,
- "#%u%s op:%i arg:0x%08x flags:0x08%x retries:%u",
- host->ccnt, (stop?" (STOP)":""),
- cmd->opcode, cmd->arg, cmd->flags, cmd->retries);
+ snprintf(host->dbgmsg_cmd, 300,
+ "#%u%s op:%i arg:0x%08x flags:0x08%x retries:%u",
+ host->ccnt, (stop ? " (STOP)" : ""),
+ cmd->opcode, cmd->arg, cmd->flags, cmd->retries);

if (cmd->data) {
snprintf(host->dbgmsg_dat, 300,
- "#%u bsize:%u blocks:%u bytes:%u",
- host->dcnt, cmd->data->blksz,
- cmd->data->blocks,
- cmd->data->blocks * cmd->data->blksz);
+ "#%u bsize:%u blocks:%u bytes:%u",
+ host->dcnt, cmd->data->blksz,
+ cmd->data->blocks,
+ cmd->data->blocks * cmd->data->blksz);
} else {
host->dbgmsg_dat[0] = '\0';
}
@@ -153,7 +154,7 @@ static inline u32 enable_imask(struct s3
u32 newmask;

newmask = readl(host->base + host->sdiimsk);
- newmask|= imask;
+ newmask |= imask;

writel(newmask, host->base + host->sdiimsk);

@@ -165,7 +166,7 @@ static inline u32 disable_imask(struct s
u32 newmask;

newmask = readl(host->base + host->sdiimsk);
- newmask&= ~imask;
+ newmask &= ~imask;

writel(newmask, host->base + host->sdiimsk);

@@ -178,7 +179,7 @@ static inline void clear_imask(struct s3
}

static inline int get_data_buffer(struct s3cmci_host *host,
- volatile u32 *words, volatile u32 **pointer)
+ u32 *words, u32 **pointer)
{
struct scatterlist *sg;

@@ -195,69 +196,82 @@ static inline int get_data_buffer(struct
}
sg = &host->mrq->data->sg[host->pio_sgptr];

- *words = sg->length >> 2;
- *pointer= page_address(sg->page) + sg->offset;
+ *words = sg->length >> 2;
+ *pointer = page_address(sg->page) + sg->offset;

host->pio_sgptr++;

dbg(host, dbg_sg, "new buffer (%i/%i)\n",
- host->pio_sgptr, host->mrq->data->sg_len);
+ host->pio_sgptr, host->mrq->data->sg_len);

return 0;
}

-#define FIFO_FILL(host) ((readl(host->base + S3C2410_SDIFSTA) & S3C2410_SDIFSTA_COUNTMASK) >> 2)
-#define FIFO_FREE(host) ((63 - (readl(host->base + S3C2410_SDIFSTA) & S3C2410_SDIFSTA_COUNTMASK)) >> 2)
+static inline u32 fifo_count(struct s3cmci_host *host)
+{
+ u32 fifostat = readl(host->base + S3C2410_SDIFSTA);
+
+ fifostat &= S3C2410_SDIFSTA_COUNTMASK;
+ return fifostat >> 2;
+}
+
+static inline u32 fifo_free(struct s3cmci_host *host)
+{
+ u32 fifostat = readl(host->base + S3C2410_SDIFSTA);
+
+ fifostat &= S3C2410_SDIFSTA_COUNTMASK;
+ return 63 - (fifostat >> 2);
+}

-static inline void do_pio_read(struct s3cmci_host *host)
+static void do_pio_read(struct s3cmci_host *host)
{
int res;
u32 fifo;
void __iomem *from_ptr;

- //write real prescaler to host, it might be set slow to fix
+ /* write real prescaler to host, it might be set slow to fix */
writel(host->prescaler, host->base + S3C2410_SDIPRE);

from_ptr = host->base + host->sdidata;

- while ((fifo = FIFO_FILL(host))) {
+ while ((fifo = fifo_count(host))) {
if (!host->pio_words) {
res = get_data_buffer(host, &host->pio_words,
- &host->pio_ptr);
+ &host->pio_ptr);
if (res) {
host->pio_active = XFER_NONE;
host->complete_what = COMPLETION_FINALIZE;

dbg(host, dbg_pio, "pio_read(): "
- "complete (no more data).\n");
+ "complete (no more data).\n");
return;
}

- dbg(host, dbg_pio, "pio_read(): new target: [%i]@[%p]\n",
- host->pio_words, host->pio_ptr);
+ dbg(host, dbg_pio,
+ "pio_read(): new target: [%i]@[%p]\n",
+ host->pio_words, host->pio_ptr);
}

- dbg(host, dbg_pio, "pio_read(): fifo:[%02i] "
- "buffer:[%03i] dcnt:[%08X]\n",
- fifo, host->pio_words,
- readl(host->base + S3C2410_SDIDCNT));
+ dbg(host, dbg_pio,
+ "pio_read(): fifo:[%02i] buffer:[%03i] dcnt:[%08X]\n",
+ fifo, host->pio_words,
+ readl(host->base + S3C2410_SDIDCNT));

if (fifo > host->pio_words)
fifo = host->pio_words;

- host->pio_words-= fifo;
- host->pio_count+= fifo;
+ host->pio_words -= fifo;
+ host->pio_count += fifo;

- while(fifo--) {
+ while (fifo--)
*(host->pio_ptr++) = readl(from_ptr);
- }
}

if (!host->pio_words) {
res = get_data_buffer(host, &host->pio_words, &host->pio_ptr);
if (res) {
- dbg(host, dbg_pio, "pio_read(): "
- "complete (no more buffers).\n");
+ dbg(host, dbg_pio,
+ "pio_read(): complete (no more buffers).\n");
host->pio_active = XFER_NONE;
host->complete_what = COMPLETION_FINALIZE;

@@ -265,10 +279,11 @@ static inline void do_pio_read(struct s3
}
}

- enable_imask(host, S3C2410_SDIIMSK_RXFIFOHALF | S3C2410_SDIIMSK_RXFIFOLAST);
+ enable_imask(host,
+ S3C2410_SDIIMSK_RXFIFOHALF | S3C2410_SDIIMSK_RXFIFOLAST);
}

-static inline void do_pio_write(struct s3cmci_host *host)
+static void do_pio_write(struct s3cmci_host *host)
{
int res;
u32 fifo;
@@ -277,33 +292,32 @@ static inline void do_pio_write(struct s

to_ptr = host->base + host->sdidata;

- while ((fifo = FIFO_FREE(host))) {
+ while ((fifo = fifo_free(host))) {
if (!host->pio_words) {
res = get_data_buffer(host, &host->pio_words,
&host->pio_ptr);
if (res) {
- dbg(host, dbg_pio, "pio_write(): "
- "complete (no more data).\n");
+ dbg(host, dbg_pio,
+ "pio_write(): complete (no more data).\n");
host->pio_active = XFER_NONE;

return;
}

- dbg(host, dbg_pio, "pio_write(): "
- "new source: [%i]@[%p]\n",
- host->pio_words, host->pio_ptr);
+ dbg(host, dbg_pio,
+ "pio_write(): new source: [%i]@[%p]\n",
+ host->pio_words, host->pio_ptr);

}

if (fifo > host->pio_words)
fifo = host->pio_words;

- host->pio_words-= fifo;
- host->pio_count+= fifo;
+ host->pio_words -= fifo;
+ host->pio_count += fifo;

- while(fifo--) {
+ while (fifo--)
writel(*(host->pio_ptr++), to_ptr);
- }
}

enable_imask(host, S3C2410_SDIIMSK_TXFIFOHALF);
@@ -324,9 +338,9 @@ static void pio_tasklet(unsigned long da
clear_imask(host);
if (host->pio_active != XFER_NONE) {
dbg(host, dbg_err, "unfinished %s "
- "- pio_count:[%u] pio_words:[%u]\n",
- (host->pio_active == XFER_READ)?"read":"write",
- host->pio_count, host->pio_words);
+ "- pio_count:[%u] pio_words:[%u]\n",
+ (host->pio_active == XFER_READ) ? "read" : "write",
+ host->pio_count, host->pio_words);

host->mrq->data->error = MMC_ERR_DMA;
}
@@ -340,7 +354,7 @@ static void pio_tasklet(unsigned long da
* ISR for SDI Interface IRQ
* Communication between driver and ISR works as follows:
* host->mrq points to current request
- * host->complete_what tells the ISR when the request is considered done
+ * host->complete_what Indicates when the request is considered done
* COMPLETION_CMDSENT when the command was sent
* COMPLETION_RSPFIN when a response was received
* COMPLETION_XFERFINISH when the data transfer is finished
@@ -365,14 +379,12 @@ static void pio_tasklet(unsigned long da

static irqreturn_t s3cmci_irq(int irq, void *dev_id)
{
- struct s3cmci_host *host;
+ struct s3cmci_host *host = dev_id;
struct mmc_command *cmd;
u32 mci_csta, mci_dsta, mci_fsta, mci_dcnt, mci_imsk;
u32 mci_cclear, mci_dclear;
unsigned long iflags;

- host = (struct s3cmci_host *)dev_id;
-
spin_lock_irqsave(&host->complete_lock, iflags);

mci_csta = readl(host->base + S3C2410_SDICMDSTAT);
@@ -384,7 +396,7 @@ static irqreturn_t s3cmci_irq(int irq, v
mci_dclear = 0;

if ((host->complete_what == COMPLETION_NONE) ||
- (host->complete_what == COMPLETION_FINALIZE)) {
+ (host->complete_what == COMPLETION_FINALIZE)) {
host->status = "nothing to complete";
clear_imask(host);
goto irq_out;
@@ -396,7 +408,7 @@ static irqreturn_t s3cmci_irq(int irq, v
goto irq_out;
}

- cmd = host->cmd_is_stop?host->mrq->stop:host->mrq->cmd;
+ cmd = host->cmd_is_stop ? host->mrq->stop : host->mrq->cmd;

if (!cmd) {
host->status = "no active cmd";
@@ -406,7 +418,7 @@ static irqreturn_t s3cmci_irq(int irq, v

if (!host->dodma) {
if ((host->pio_active == XFER_WRITE) &&
- (mci_fsta & S3C2410_SDIFSTA_TFDET)) {
+ (mci_fsta & S3C2410_SDIFSTA_TFDET)) {

disable_imask(host, S3C2410_SDIIMSK_TXFIFOHALF);
tasklet_schedule(&host->pio_tasklet);
@@ -414,10 +426,11 @@ static irqreturn_t s3cmci_irq(int irq, v
}

if ((host->pio_active == XFER_READ) &&
- (mci_fsta & S3C2410_SDIFSTA_RFDET)) {
+ (mci_fsta & S3C2410_SDIFSTA_RFDET)) {

disable_imask(host,
- S3C2410_SDIIMSK_RXFIFOHALF | S3C2410_SDIIMSK_RXFIFOLAST);
+ S3C2410_SDIIMSK_RXFIFOHALF |
+ S3C2410_SDIIMSK_RXFIFOLAST);

tasklet_schedule(&host->pio_tasklet);
host->status = "pio rx";
@@ -506,9 +519,8 @@ static irqreturn_t s3cmci_irq(int irq, v
goto close_transfer;
}

- if (host->complete_what == COMPLETION_XFERFINISH_RSPFIN) {
+ if (host->complete_what == COMPLETION_XFERFINISH_RSPFIN)
host->complete_what = COMPLETION_RSPFIN;
- }

mci_dclear |= S3C2410_SDIDSTA_XFERFINISH;
}
@@ -531,10 +543,9 @@ close_transfer:
goto irq_out;

irq_out:
- dbg(host, dbg_irq, "csta:0x%08x dsta:0x%08x "
- "fsta:0x%08x dcnt:0x%08x status:%s.\n",
- mci_csta, mci_dsta, mci_fsta,
- mci_dcnt, host->status);
+ dbg(host, dbg_irq,
+ "csta:0x%08x dsta:0x%08x fsta:0x%08x dcnt:0x%08x status:%s.\n",
+ mci_csta, mci_dsta, mci_fsta, mci_dcnt, host->status);

spin_unlock_irqrestore(&host->complete_lock, iflags);
return IRQ_HANDLED;
@@ -557,7 +568,7 @@ static irqreturn_t s3cmci_irq_cd(int irq
}

void s3cmci_dma_done_callback(struct s3c2410_dma_chan *dma_ch, void *buf_id,
- int size, enum s3c2410_dma_buffresult result)
+ int size, enum s3c2410_dma_buffresult result)
{
unsigned long iflags;
u32 mci_csta, mci_dsta, mci_fsta, mci_dcnt;
@@ -568,11 +579,9 @@ void s3cmci_dma_done_callback(struct s3c
mci_fsta = readl(host->base + S3C2410_SDIFSTA);
mci_dcnt = readl(host->base + S3C2410_SDIDCNT);

- if ((!host->mrq) || (!host->mrq) || (!host->mrq->data))
- return;
-
- if (!host->dmatogo)
- return;
+ BUG_ON(!host->mrq);
+ BUG_ON(!host->mrq->data);
+ BUG_ON(!host->dmatogo);

spin_lock_irqsave(&host->complete_lock, iflags);

@@ -616,7 +625,7 @@ fail_request:
static void finalize_request(struct s3cmci_host *host)
{
struct mmc_request *mrq = host->mrq;
- struct mmc_command *cmd = host->cmd_is_stop?mrq->stop:mrq->cmd;
+ struct mmc_command *cmd = host->cmd_is_stop ? mrq->stop : mrq->cmd;
int debug_as_failure = 0;

if (host->complete_what != COMPLETION_FINALIZE)
@@ -626,21 +635,19 @@ static void finalize_request(struct s3cm
return;

if (cmd->data && (cmd->error == MMC_ERR_NONE) &&
- (cmd->data->error == MMC_ERR_NONE)) {
-
+ (cmd->data->error == MMC_ERR_NONE)) {
if (host->dodma && (!host->dma_complete)) {
dbg(host, dbg_dma, "DMA Missing!\n");
return;
}
}

- // Read response
+ /* Read response from controller. */
cmd->resp[0] = readl(host->base + S3C2410_SDIRSP0);
cmd->resp[1] = readl(host->base + S3C2410_SDIRSP1);
cmd->resp[2] = readl(host->base + S3C2410_SDIRSP2);
cmd->resp[3] = readl(host->base + S3C2410_SDIRSP3);

- // reset clock speed, as it could still be set low for
writel(host->prescaler, host->base + S3C2410_SDIPRE);

if (cmd->error)
@@ -649,12 +656,10 @@ static void finalize_request(struct s3cm
if (cmd->data && cmd->data->error)
debug_as_failure = 1;

- //if(cmd->flags & MMC_RSP_MAYFAIL) debug_as_failure = 0;
-
#ifdef CONFIG_MMC_DEBUG
dbg_dumpcmd(host, cmd, debug_as_failure);
#endif
- //Cleanup controller
+ /* Cleanup controller */
writel(0, host->base + S3C2410_SDICMDARG);
writel(0, host->base + S3C2410_SDIDCON);
writel(0, host->base + S3C2410_SDICMDCON);
@@ -669,12 +674,11 @@ static void finalize_request(struct s3cm
return;
}

- // If we have no data transfer we are finished here
+ /* If we have no data transfer we are finished here */
if (!mrq->data)
goto request_done;

- // Calulate the amout of bytes transfer, but only if there was
- // no error
+ /* Calulate the amout of bytes transfer if there was no error */
if (mrq->data->error == MMC_ERR_NONE) {
mrq->data->bytes_xfered =
(mrq->data->blocks * mrq->data->blksz);
@@ -682,23 +686,23 @@ static void finalize_request(struct s3cm
mrq->data->bytes_xfered = 0;
}

- // If we had an error while transfering data we flush the
- // DMA channel and the fifo to clear out any garbage
+ /* If we had an error while transfering data we flush the
+ * DMA channel and the fifo to clear out any garbage. */
if (mrq->data->error != MMC_ERR_NONE) {
if (host->dodma)
s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_FLUSH);

if (host->is2440) {
- //Clear failure register and reset fifo
+ /* Clear failure register and reset fifo. */
writel(S3C2440_SDIFSTA_FIFORESET |
S3C2440_SDIFSTA_FIFOFAIL,
host->base + S3C2410_SDIFSTA);
} else {
u32 mci_con;

- //reset fifo
+ /* reset fifo */
mci_con = readl(host->base + S3C2410_SDICON);
- mci_con|= S3C2410_SDICON_FIFORESET;
+ mci_con |= S3C2410_SDICON_FIFORESET;

writel(mci_con, host->base + S3C2410_SDICON);
}
@@ -713,8 +717,8 @@ request_done:

void s3cmci_dma_setup(struct s3cmci_host *host, enum s3c2410_dmasrc source)
{
- static int setup_ok = 0;
static enum s3c2410_dmasrc last_source = -1;
+ static int setup_ok;

if (last_source == source)
return;
@@ -727,7 +731,8 @@ void s3cmci_dma_setup(struct s3cmci_host
if (!setup_ok) {
s3c2410_dma_config(host->dma, 4,
(S3C2410_DCON_HWTRIG | S3C2410_DCON_CH0_SDI));
- s3c2410_dma_set_buffdone_fn(host->dma, s3cmci_dma_done_callback);
+ s3c2410_dma_set_buffdone_fn(host->dma,
+ s3cmci_dma_done_callback);
s3c2410_dma_setflags(host->dma, S3C2410_DMAF_AUTOSTART);
setup_ok = 1;
}
@@ -744,31 +749,30 @@ static void s3cmci_send_command(struct s

enable_imask(host, imsk);

- if (cmd->data) {
+ if (cmd->data)
host->complete_what = COMPLETION_XFERFINISH_RSPFIN;
- } else if (cmd->flags & MMC_RSP_PRESENT) {
+ else if (cmd->flags & MMC_RSP_PRESENT)
host->complete_what = COMPLETION_RSPFIN;
- } else {
+ else
host->complete_what = COMPLETION_CMDSENT;
- }

writel(cmd->arg, host->base + S3C2410_SDICMDARG);

- ccon = cmd->opcode & S3C2410_SDICMDCON_INDEX;
- ccon|= S3C2410_SDICMDCON_SENDERHOST | S3C2410_SDICMDCON_CMDSTART;
+ ccon = cmd->opcode & S3C2410_SDICMDCON_INDEX;
+ ccon |= S3C2410_SDICMDCON_SENDERHOST | S3C2410_SDICMDCON_CMDSTART;

if (cmd->flags & MMC_RSP_PRESENT)
ccon |= S3C2410_SDICMDCON_WAITRSP;

if (cmd->flags & MMC_RSP_136)
- ccon|= S3C2410_SDICMDCON_LONGRSP;
+ ccon |= S3C2410_SDICMDCON_LONGRSP;

writel(ccon, host->base + S3C2410_SDICMDCON);
}

static int s3cmci_setup_data(struct s3cmci_host *host, struct mmc_data *data)
{
- u32 dcon, imsk, stoptries=3;
+ u32 dcon, imsk, stoptries = 3;

/* write DCON register */

@@ -777,16 +781,16 @@ static int s3cmci_setup_data(struct s3cm
return 0;
}

- while(readl(host->base + S3C2410_SDIDSTA) &
- (S3C2410_SDIDSTA_TXDATAON | S3C2410_SDIDSTA_RXDATAON)) {
+ while (readl(host->base + S3C2410_SDIDSTA) &
+ (S3C2410_SDIDSTA_TXDATAON | S3C2410_SDIDSTA_RXDATAON)) {

dbg(host, dbg_err,
- "mci_setup_data() transfer stillin progress.\n");
+ "mci_setup_data() transfer stillin progress.\n");

writel(0, host->base + S3C2410_SDIDCON);
s3cmci_reset(host);

- if (0 == (stoptries--)) {
+ if ((stoptries--) == 0) {
#ifdef CONFIG_MMC_DEBUG
dbg_dumpregs(host, "DRF");
#endif
@@ -797,17 +801,14 @@ static int s3cmci_setup_data(struct s3cm

dcon = data->blocks & S3C2410_SDIDCON_BLKNUM_MASK;

- if (host->dodma) {
+ if (host->dodma)
dcon |= S3C2410_SDIDCON_DMAEN;
- }

- if (host->bus_width == MMC_BUS_WIDTH_4) {
+ if (host->bus_width == MMC_BUS_WIDTH_4)
dcon |= S3C2410_SDIDCON_WIDEBUS;
- }

- if (!(data->flags & MMC_DATA_STREAM)) {
+ if (!(data->flags & MMC_DATA_STREAM))
dcon |= S3C2410_SDIDCON_BLOCKMODE;
- }

if (data->flags & MMC_DATA_WRITE) {
dcon |= S3C2410_SDIDCON_TXAFTERRESP;
@@ -831,8 +832,8 @@ static int s3cmci_setup_data(struct s3cm
writel(data->blksz, host->base + S3C2410_SDIBSIZE);

/* add to IMASK register */
- imsk = S3C2410_SDIIMSK_FIFOFAIL | S3C2410_SDIIMSK_DATACRC |
- S3C2410_SDIIMSK_DATATIMEOUT | S3C2410_SDIIMSK_DATAFINISH;
+ imsk = S3C2410_SDIIMSK_FIFOFAIL | S3C2410_SDIIMSK_DATACRC |
+ S3C2410_SDIIMSK_DATATIMEOUT | S3C2410_SDIIMSK_DATAFINISH;

enable_imask(host, imsk);

@@ -843,35 +844,33 @@ static int s3cmci_setup_data(struct s3cm
} else {
writel(0x0000FFFF, host->base + S3C2410_SDITIMER);

- //FIX: set slow clock to prevent timeouts on read
- if (data->flags & MMC_DATA_READ) {
+ /* FIX: set slow clock to prevent timeouts on read */
+ if (data->flags & MMC_DATA_READ)
writel(0xFF, host->base + S3C2410_SDIPRE);
- }
}

- //debug_dump_registers(host, "Data setup:");
-
return 0;
}

+#define BOTH_DIR (MMC_DATA_WRITE | MMC_DATA_READ)
+
static int s3cmci_prepare_pio(struct s3cmci_host *host, struct mmc_data *data)
{
- int rw = (data->flags & MMC_DATA_WRITE)?1:0;
+ int rw = (data->flags & MMC_DATA_WRITE) ? 1 : 0;

- if (rw != ((data->flags & MMC_DATA_READ)?0:1))
- return -EINVAL;
+ BUG_ON((data->flags & BOTH_DIR) == BOTH_DIR);

host->pio_sgptr = 0;
host->pio_words = 0;
host->pio_count = 0;
- host->pio_active = rw?XFER_WRITE:XFER_READ;
+ host->pio_active = rw ? XFER_WRITE : XFER_READ;

if (rw) {
do_pio_write(host);
enable_imask(host, S3C2410_SDIIMSK_TXFIFOHALF);
} else {
enable_imask(host, S3C2410_SDIIMSK_RXFIFOHALF
- | S3C2410_SDIIMSK_RXFIFOLAST);
+ | S3C2410_SDIIMSK_RXFIFOLAST);
}

return 0;
@@ -880,18 +879,15 @@ static int s3cmci_prepare_pio(struct s3c
static int s3cmci_prepare_dma(struct s3cmci_host *host, struct mmc_data *data)
{
int dma_len, i;
+ int rw = (data->flags & MMC_DATA_WRITE) ? 1 : 0;

- int rw = (data->flags & MMC_DATA_WRITE)?1:0;
-
- if (rw != ((data->flags & MMC_DATA_READ)?0:1))
- return -EINVAL;
+ BUG_ON((data->flags & BOTH_DIR) == BOTH_DIR);

- s3cmci_dma_setup(host, rw?S3C2410_DMASRC_MEM:S3C2410_DMASRC_HW);
+ s3cmci_dma_setup(host, rw ? S3C2410_DMASRC_MEM : S3C2410_DMASRC_HW);
s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_FLUSH);

dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
- (rw)?DMA_TO_DEVICE:DMA_FROM_DEVICE);
-
+ (rw) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);

if (dma_len == 0)
return -ENOMEM;
@@ -907,14 +903,14 @@ static int s3cmci_prepare_dma(struct s3c
sg_dma_len(&data->sg[i]));

res = s3c2410_dma_enqueue(host->dma, (void *) host,
- sg_dma_address(&data->sg[i]),
- sg_dma_len(&data->sg[i]));
+ sg_dma_address(&data->sg[i]),
+ sg_dma_len(&data->sg[i]));

if (res) {
s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_FLUSH);
return -EBUSY;
}
- }
+ }

s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_START);

@@ -925,21 +921,21 @@ static void s3cmci_send_request(struct m
{
struct s3cmci_host *host = mmc_priv(mmc);
struct mmc_request *mrq = host->mrq;
- struct mmc_command *cmd = host->cmd_is_stop?mrq->stop:mrq->cmd;
+ struct mmc_command *cmd = host->cmd_is_stop ? mrq->stop : mrq->cmd;

host->ccnt++;
#ifdef CONFIG_MMC_DEBUG
prepare_dbgmsg(host, cmd, host->cmd_is_stop);
#endif
- //Clear command, data and fifo status registers
- //Fifo clear only necessary on 2440, but doesn't hurt on 2410
+ /* Clear command, data and fifo status registers
+ Fifo clear only necessary on 2440, but doesn't hurt on 2410
+ */
writel(0xFFFFFFFF, host->base + S3C2410_SDICMDSTAT);
writel(0xFFFFFFFF, host->base + S3C2410_SDIDSTA);
writel(0xFFFFFFFF, host->base + S3C2410_SDIFSTA);

if (cmd->data) {
- int res;
- res = s3cmci_setup_data(host, cmd->data);
+ int res = s3cmci_setup_data(host, cmd->data);

host->dcnt++;

@@ -951,12 +947,10 @@ static void s3cmci_send_request(struct m
return;
}

-
- if (host->dodma) {
+ if (host->dodma)
res = s3cmci_prepare_dma(host, cmd->data);
- } else {
+ else
res = s3cmci_prepare_pio(host, cmd->data);
- }

if (res) {
cmd->error = MMC_ERR_DMA;
@@ -968,16 +962,16 @@ static void s3cmci_send_request(struct m

}

- // Send command
+ /* Send command */
s3cmci_send_command(host, cmd);

- // Enable Interrupt
+ /* Enable Interrupt */
enable_irq(host->irq);
}

static void s3cmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
- struct s3cmci_host *host = mmc_priv(mmc);
+ struct s3cmci_host *host = mmc_priv(mmc);

host->cmd_is_stop = 0;
host->mrq = mrq;
@@ -990,62 +984,64 @@ static void s3cmci_set_ios(struct mmc_ho
struct s3cmci_host *host = mmc_priv(mmc);
u32 mci_psc, mci_con;

- //Set power
- mci_con = readl(host->base + S3C2410_SDICON);
- switch(ios->power_mode) {
- case MMC_POWER_ON:
- case MMC_POWER_UP:
- s3c2410_gpio_cfgpin(S3C2410_GPE5, S3C2410_GPE5_SDCLK);
- s3c2410_gpio_cfgpin(S3C2410_GPE6, S3C2410_GPE6_SDCMD);
- s3c2410_gpio_cfgpin(S3C2410_GPE7, S3C2410_GPE7_SDDAT0);
- s3c2410_gpio_cfgpin(S3C2410_GPE8, S3C2410_GPE8_SDDAT1);
- s3c2410_gpio_cfgpin(S3C2410_GPE9, S3C2410_GPE9_SDDAT2);
- s3c2410_gpio_cfgpin(S3C2410_GPE10, S3C2410_GPE10_SDDAT3);
-
- if (!host->is2440)
- mci_con|=S3C2410_SDICON_FIFORESET;
+ /* Set the power state */

- break;
+ mci_con = readl(host->base + S3C2410_SDICON);

- case MMC_POWER_OFF:
- default:
- s3c2410_gpio_setpin(S3C2410_GPE5, 0);
- s3c2410_gpio_cfgpin(S3C2410_GPE5, S3C2410_GPE5_OUTP);
+ switch (ios->power_mode) {
+ case MMC_POWER_ON:
+ case MMC_POWER_UP:
+ s3c2410_gpio_cfgpin(S3C2410_GPE5, S3C2410_GPE5_SDCLK);
+ s3c2410_gpio_cfgpin(S3C2410_GPE6, S3C2410_GPE6_SDCMD);
+ s3c2410_gpio_cfgpin(S3C2410_GPE7, S3C2410_GPE7_SDDAT0);
+ s3c2410_gpio_cfgpin(S3C2410_GPE8, S3C2410_GPE8_SDDAT1);
+ s3c2410_gpio_cfgpin(S3C2410_GPE9, S3C2410_GPE9_SDDAT2);
+ s3c2410_gpio_cfgpin(S3C2410_GPE10, S3C2410_GPE10_SDDAT3);
+
+ if (!host->is2440)
+ mci_con |= S3C2410_SDICON_FIFORESET;
+
+ break;
+
+ case MMC_POWER_OFF:
+ default:
+ s3c2410_gpio_setpin(S3C2410_GPE5, 0);
+ s3c2410_gpio_cfgpin(S3C2410_GPE5, S3C2410_GPE5_OUTP);

- if (host->is2440)
- mci_con|=S3C2440_SDICON_SDRESET;
+ if (host->is2440)
+ mci_con |= S3C2440_SDICON_SDRESET;

- break;
+ break;
}

- //Set clock
- for (mci_psc=0; mci_psc<255; mci_psc++) {
+ /* Set clock */
+ for (mci_psc = 0; mci_psc < 255; mci_psc++) {
host->real_rate = host->clk_rate / (host->clk_div*(mci_psc+1));

if (host->real_rate <= ios->clock)
break;
}

- if(mci_psc > 255) mci_psc = 255;
- host->prescaler = mci_psc;
+ if (mci_psc > 255)
+ mci_psc = 255;

+ host->prescaler = mci_psc;
writel(host->prescaler, host->base + S3C2410_SDIPRE);

- //If requested clock is 0, real_rate will be 0, too
+ /* If requested clock is 0, real_rate will be 0, too */
if (ios->clock == 0)
host->real_rate = 0;

- //Set CLOCK_ENABLE
+ /* Set CLOCK_ENABLE */
if (ios->clock)
mci_con |= S3C2410_SDICON_CLOCKTYPE;
else
- mci_con &=~S3C2410_SDICON_CLOCKTYPE;
+ mci_con &= ~S3C2410_SDICON_CLOCKTYPE;

writel(mci_con, host->base + S3C2410_SDICON);

- if ((ios->power_mode==MMC_POWER_ON)
- || (ios->power_mode==MMC_POWER_UP)) {
-
+ if ((ios->power_mode == MMC_POWER_ON) ||
+ (ios->power_mode == MMC_POWER_UP)) {
dbg(host, dbg_conf, "running at %lukHz (requested: %ukHz).\n",
host->real_rate/1000, ios->clock/1000);
} else {
@@ -1053,7 +1049,6 @@ static void s3cmci_set_ios(struct mmc_ho
}

host->bus_width = ios->bus_width;
-
}

static void s3cmci_reset(struct s3cmci_host *host)
@@ -1061,7 +1056,6 @@ static void s3cmci_reset(struct s3cmci_h
u32 con = readl(host->base + S3C2410_SDICON);

con |= S3C2440_SDICON_SDRESET;
-
writel(con, host->base + S3C2410_SDICON);
}

@@ -1086,20 +1080,21 @@ static int s3cmci_probe(struct platform_
host = mmc_priv(mmc);
host->mmc = mmc;
host->pdev = pdev;
+ host->is2440 = is2440;

spin_lock_init(&host->complete_lock);
tasklet_init(&host->pio_tasklet, pio_tasklet, (unsigned long) host);
+
if (is2440) {
- host->is2440 = 1;
host->sdiimsk = S3C2440_SDIIMSK;
host->sdidata = S3C2440_SDIDATA;
host->clk_div = 1;
} else {
- host->is2440 = 0;
host->sdiimsk = S3C2410_SDIIMSK;
host->sdidata = S3C2410_SDIDATA;
host->clk_div = 2;
}
+
host->dodma = 0;
host->complete_what = COMPLETION_NONE;
host->pio_active = XFER_NONE;
@@ -1153,7 +1148,6 @@ static int s3cmci_probe(struct platform_
if (request_irq(host->irq_cd, s3cmci_irq_cd, 0, DRIVER_NAME, host)) {
dev_err(&pdev->dev,
"failed to request card detect interrupt.\n");
-
ret = -ENOENT;
goto probe_free_irq;
}
@@ -1172,7 +1166,8 @@ static int s3cmci_probe(struct platform_
goto probe_free_host;
}

- if ((ret = clk_enable(host->clk))) {
+ ret = clk_enable(host->clk);
+ if (ret) {
dev_err(&pdev->dev, "failed to enable clock source.\n");
goto clk_free;
}
@@ -1193,18 +1188,20 @@ static int s3cmci_probe(struct platform_
mmc->max_phys_segs = 128;
mmc->max_hw_segs = 128;

- dbg(host, dbg_debug, "probe: mode:%s mapped mci_base:%p irq:%u irq_cd:%u dma:%u.\n",
- (host->is2440?"2440":""),
- host->base, host->irq, host->irq_cd, host->dma);
+ dbg(host, dbg_debug,
+ "probe: mode:%s mapped mci_base:%p irq:%u irq_cd:%u dma:%u.\n",
+ (host->is2440?"2440":""),
+ host->base, host->irq, host->irq_cd, host->dma);

- if ((ret = mmc_add_host(mmc))) {
+ ret = mmc_add_host(mmc);
+ if (ret) {
dev_err(&pdev->dev, "failed to add mmc host.\n");
goto free_dmabuf;
}

platform_set_drvdata(pdev, mmc);
+ dev_info(&pdev->dev, "initialisation done.\n");

- dev_info(&pdev->dev,"initialisation done.\n");
return 0;

free_dmabuf:
@@ -1214,10 +1211,10 @@ static int s3cmci_probe(struct platform_
clk_put(host->clk);

probe_free_irq_cd:
- free_irq(host->irq_cd, host);
+ free_irq(host->irq_cd, host);

probe_free_irq:
- free_irq(host->irq, host);
+ free_irq(host->irq, host);

probe_iounmap:
iounmap(host->base);
@@ -1237,14 +1234,19 @@ static int s3cmci_remove(struct platform
struct s3cmci_host *host = mmc_priv(mmc);

mmc_remove_host(mmc);
+
clk_disable(host->clk);
clk_put(host->clk);
- free_irq(host->irq_cd, host);
- free_irq(host->irq, host);
+
+ tasklet_disable(&host->pio_tasklet);
+
+ free_irq(host->irq_cd, host);
+ free_irq(host->irq, host);
+
iounmap(host->base);
release_mem_region(host->mem->start, RESSIZE(host->mem));
- mmc_free_host(mmc);

+ mmc_free_host(mmc);
return 0;
}

@@ -1285,27 +1287,27 @@ static int s3cmci_resume(struct platform
#endif /* CONFIG_PM */


-static struct platform_driver s3cmci_driver_2410 =
-{
+static struct platform_driver s3cmci_driver_2410 = {
.driver.name = "s3c2410-sdi",
+ .driver.owner = THIS_MODULE,
.probe = s3cmci_probe_2410,
.remove = s3cmci_remove,
.suspend = s3cmci_suspend,
.resume = s3cmci_resume,
};

-static struct platform_driver s3cmci_driver_2412 =
-{
+static struct platform_driver s3cmci_driver_2412 = {
.driver.name = "s3c2412-sdi",
+ .driver.owner = THIS_MODULE,
.probe = s3cmci_probe_2412,
.remove = s3cmci_remove,
.suspend = s3cmci_suspend,
.resume = s3cmci_resume,
};

-static struct platform_driver s3cmci_driver_2440 =
-{
+static struct platform_driver s3cmci_driver_2440 = {
.driver.name = "s3c2440-sdi",
+ .driver.owner = THIS_MODULE,
.probe = s3cmci_probe_2440,
.remove = s3cmci_remove,
.suspend = s3cmci_suspend,
@@ -1334,4 +1336,3 @@ module_exit(s3cmci_exit);
MODULE_DESCRIPTION("Samsung S3C MMC/SD Card Interface driver");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Thomas Kleffel <tk@xxxxxxxxxxx>");
-
Index: linux-2.6.26-rc5-q2/drivers/mmc/host/s3cmci.h
===================================================================
--- linux-2.6.26-rc5-q2.orig/drivers/mmc/host/s3cmci.h 2008-06-07 12:25:27.000000000 +0100
+++ linux-2.6.26-rc5-q2/drivers/mmc/host/s3cmci.h 2008-06-16 15:13:28.000000000 +0100
@@ -8,7 +8,7 @@
* published by the Free Software Foundation.
*/

-//FIXME: DMA Resource management ?!
+/* FIXME: DMA Resource management ?! */
#define S3CMCI_DMA 0

enum s3cmci_waitfor {
@@ -39,32 +39,30 @@ struct s3cmci_host {
unsigned sdiimsk;
unsigned sdidata;
int dodma;
-
- volatile int dmatogo;
+ int dmatogo;

struct mmc_request *mrq;
int cmd_is_stop;

spinlock_t complete_lock;
- volatile enum s3cmci_waitfor
- complete_what;
+ enum s3cmci_waitfor complete_what;

- volatile int dma_complete;
+ int dma_complete;

- volatile u32 pio_sgptr;
- volatile u32 pio_words;
- volatile u32 pio_count;
- volatile u32 *pio_ptr;
+ u32 pio_sgptr;
+ u32 pio_words;
+ u32 pio_count;
+ u32 *pio_ptr;
#define XFER_NONE 0
#define XFER_READ 1
#define XFER_WRITE 2
- volatile u32 pio_active;
+ u32 pio_active;

int bus_width;

char dbgmsg_cmd[301];
char dbgmsg_dat[301];
- volatile char *status;
+ char *status;

unsigned int ccnt, dcnt;
struct tasklet_struct pio_tasklet;

--
Ben (ben@xxxxxxxxx, http://www.fluff.org/)

'a smiley only costs 4 bytes'
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