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authorRussell King <rmk+kernel@arm.linux.org.uk>2010-07-31 14:20:02 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-07-31 14:20:02 +0100
commitceb0885d3b01bb2e2f18765770e212914f2864be (patch)
tree0952c90cd49704a9172e985ca491d79b60c40bc8 /drivers
parentb31fc7af78e17b0203e1cd5a195c590e8adeae0d (diff)
parent08458ef6eede6cf7d5a33c3a7c8bcdc3943012c2 (diff)
downloadkernel-ceb0885d3b01bb2e2f18765770e212914f2864be.tar.gz
Merge branch 'misc' into devel
Conflicts: arch/arm/mm/init.c
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpio/pl061.c4
-rw-r--r--drivers/mmc/host/mmci.c148
-rw-r--r--drivers/mmc/host/mmci.h39
-rw-r--r--drivers/rtc/rtc-pl031.c2
-rw-r--r--drivers/serial/amba-pl010.c2
-rw-r--r--drivers/serial/amba-pl011.c90
6 files changed, 171 insertions, 114 deletions
diff --git a/drivers/gpio/pl061.c b/drivers/gpio/pl061.c
index ee568c8fcbd0..5005990f751f 100644
--- a/drivers/gpio/pl061.c
+++ b/drivers/gpio/pl061.c
@@ -232,7 +232,7 @@ static void pl061_irq_handler(unsigned irq, struct irq_desc *desc)
desc->chip->unmask(irq);
}
-static int __init pl061_probe(struct amba_device *dev, struct amba_id *id)
+static int pl061_probe(struct amba_device *dev, struct amba_id *id)
{
struct pl061_platform_data *pdata;
struct pl061_gpio *chip;
@@ -333,7 +333,7 @@ free_mem:
return ret;
}
-static struct amba_id pl061_ids[] __initdata = {
+static struct amba_id pl061_ids[] = {
{
.id = 0x00041061,
.mask = 0x000fffff,
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 4917af96bae1..7edae83603dd 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -26,7 +26,6 @@
#include <linux/amba/mmci.h>
#include <linux/regulator/consumer.h>
-#include <asm/cacheflush.h>
#include <asm/div64.h>
#include <asm/io.h>
#include <asm/sizes.h>
@@ -37,12 +36,39 @@
static unsigned int fmax = 515633;
+/**
+ * struct variant_data - MMCI variant-specific quirks
+ * @clkreg: default value for MCICLOCK register
+ * @clkreg_enable: enable value for MMCICLOCK register
+ * @datalength_bits: number of bits in the MMCIDATALENGTH register
+ */
+struct variant_data {
+ unsigned int clkreg;
+ unsigned int clkreg_enable;
+ unsigned int datalength_bits;
+};
+
+static struct variant_data variant_arm = {
+ .datalength_bits = 16,
+};
+
+static struct variant_data variant_u300 = {
+ .clkreg_enable = 1 << 13, /* HWFCEN */
+ .datalength_bits = 16,
+};
+
+static struct variant_data variant_ux500 = {
+ .clkreg = MCI_CLK_ENABLE,
+ .clkreg_enable = 1 << 14, /* HWFCEN */
+ .datalength_bits = 24,
+};
/*
* This must be called with host->lock held
*/
static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired)
{
- u32 clk = 0;
+ struct variant_data *variant = host->variant;
+ u32 clk = variant->clkreg;
if (desired) {
if (desired >= host->mclk) {
@@ -54,8 +80,8 @@ static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired)
clk = 255;
host->cclk = host->mclk / (2 * (clk + 1));
}
- if (host->hw_designer == AMBA_VENDOR_ST)
- clk |= MCI_ST_FCEN; /* Bug fix in ST IP block */
+
+ clk |= variant->clkreg_enable;
clk |= MCI_CLK_ENABLE;
/* This hasn't proven to be worthwhile */
/* clk |= MCI_CLK_PWRSAVE; */
@@ -98,6 +124,18 @@ static void mmci_stop_data(struct mmci_host *host)
host->data = NULL;
}
+static void mmci_init_sg(struct mmci_host *host, struct mmc_data *data)
+{
+ unsigned int flags = SG_MITER_ATOMIC;
+
+ if (data->flags & MMC_DATA_READ)
+ flags |= SG_MITER_TO_SG;
+ else
+ flags |= SG_MITER_FROM_SG;
+
+ sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags);
+}
+
static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
{
unsigned int datactrl, timeout, irqmask;
@@ -109,7 +147,7 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
data->blksz, data->blocks, data->flags);
host->data = data;
- host->size = data->blksz;
+ host->size = data->blksz * data->blocks;
host->data_xfered = 0;
mmci_init_sg(host, data);
@@ -210,8 +248,17 @@ mmci_data_irq(struct mmci_host *host, struct mmc_data *data,
* We hit an error condition. Ensure that any data
* partially written to a page is properly coherent.
*/
- if (host->sg_len && data->flags & MMC_DATA_READ)
- flush_dcache_page(sg_page(host->sg_ptr));
+ if (data->flags & MMC_DATA_READ) {
+ struct sg_mapping_iter *sg_miter = &host->sg_miter;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ if (sg_miter_next(sg_miter)) {
+ flush_dcache_page(sg_miter->page);
+ sg_miter_stop(sg_miter);
+ }
+ local_irq_restore(flags);
+ }
}
if (status & MCI_DATAEND) {
mmci_stop_data(host);
@@ -314,15 +361,18 @@ static int mmci_pio_write(struct mmci_host *host, char *buffer, unsigned int rem
static irqreturn_t mmci_pio_irq(int irq, void *dev_id)
{
struct mmci_host *host = dev_id;
+ struct sg_mapping_iter *sg_miter = &host->sg_miter;
void __iomem *base = host->base;
+ unsigned long flags;
u32 status;
status = readl(base + MMCISTATUS);
dev_dbg(mmc_dev(host->mmc), "irq1 (pio) %08x\n", status);
+ local_irq_save(flags);
+
do {
- unsigned long flags;
unsigned int remain, len;
char *buffer;
@@ -336,11 +386,11 @@ static irqreturn_t mmci_pio_irq(int irq, void *dev_id)
if (!(status & (MCI_TXFIFOHALFEMPTY|MCI_RXDATAAVLBL)))
break;
- /*
- * Map the current scatter buffer.
- */
- buffer = mmci_kmap_atomic(host, &flags) + host->sg_off;
- remain = host->sg_ptr->length - host->sg_off;
+ if (!sg_miter_next(sg_miter))
+ break;
+
+ buffer = sg_miter->addr;
+ remain = sg_miter->length;
len = 0;
if (status & MCI_RXACTIVE)
@@ -348,31 +398,24 @@ static irqreturn_t mmci_pio_irq(int irq, void *dev_id)
if (status & MCI_TXACTIVE)
len = mmci_pio_write(host, buffer, remain, status);
- /*
- * Unmap the buffer.
- */
- mmci_kunmap_atomic(host, buffer, &flags);
+ sg_miter->consumed = len;
- host->sg_off += len;
host->size -= len;
remain -= len;
if (remain)
break;
- /*
- * If we were reading, and we have completed this
- * page, ensure that the data cache is coherent.
- */
if (status & MCI_RXACTIVE)
- flush_dcache_page(sg_page(host->sg_ptr));
-
- if (!mmci_next_sg(host))
- break;
+ flush_dcache_page(sg_miter->page);
status = readl(base + MMCISTATUS);
} while (1);
+ sg_miter_stop(sg_miter);
+
+ local_irq_restore(flags);
+
/*
* If we're nearing the end of the read, switch to
* "any data available" mode.
@@ -477,16 +520,9 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
/* This implicitly enables the regulator */
mmc_regulator_set_ocr(host->vcc, ios->vdd);
#endif
- /*
- * The translate_vdd function is not used if you have
- * an external regulator, or your design is really weird.
- * Using it would mean sending in power control BOTH using
- * a regulator AND the 4 MMCIPWR bits. If we don't have
- * a regulator, we might have some other platform specific
- * power control behind this translate function.
- */
- if (!host->vcc && host->plat->translate_vdd)
- pwr |= host->plat->translate_vdd(mmc_dev(mmc), ios->vdd);
+ if (host->plat->vdd_handler)
+ pwr |= host->plat->vdd_handler(mmc_dev(mmc), ios->vdd,
+ ios->power_mode);
/* The ST version does not have this, fall through to POWER_ON */
if (host->hw_designer != AMBA_VENDOR_ST) {
pwr |= MCI_PWR_UP;
@@ -551,21 +587,10 @@ static const struct mmc_host_ops mmci_ops = {
.get_cd = mmci_get_cd,
};
-static void mmci_check_status(unsigned long data)
-{
- struct mmci_host *host = (struct mmci_host *)data;
- unsigned int status = mmci_get_cd(host->mmc);
-
- if (status ^ host->oldstat)
- mmc_detect_change(host->mmc, 0);
-
- host->oldstat = status;
- mod_timer(&host->timer, jiffies + HZ);
-}
-
static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
{
struct mmci_platform_data *plat = dev->dev.platform_data;
+ struct variant_data *variant = id->data;
struct mmci_host *host;
struct mmc_host *mmc;
int ret;
@@ -609,6 +634,7 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
goto clk_free;
host->plat = plat;
+ host->variant = variant;
host->mclk = clk_get_rate(host->clk);
/*
* According to the spec, mclk is max 100 MHz,
@@ -669,6 +695,7 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
if (host->vcc == NULL)
mmc->ocr_avail = plat->ocr_mask;
mmc->caps = plat->capabilities;
+ mmc->caps |= MMC_CAP_NEEDS_POLL;
/*
* We can do SGIO
@@ -677,10 +704,11 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
mmc->max_phys_segs = NR_SG;
/*
- * Since we only have a 16-bit data length register, we must
- * ensure that we don't exceed 2^16-1 bytes in a single request.
+ * Since only a certain number of bits are valid in the data length
+ * register, we must ensure that we don't exceed 2^num-1 bytes in a
+ * single request.
*/
- mmc->max_req_size = 65535;
+ mmc->max_req_size = (1 << variant->datalength_bits) - 1;
/*
* Set the maximum segment size. Since we aren't doing DMA
@@ -734,7 +762,6 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
writel(MCI_IRQENABLE, host->base + MMCIMASK0);
amba_set_drvdata(dev, mmc);
- host->oldstat = mmci_get_cd(host->mmc);
mmc_add_host(mmc);
@@ -742,12 +769,6 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
mmc_hostname(mmc), amba_rev(dev), amba_config(dev),
(unsigned long long)dev->res.start, dev->irq[0], dev->irq[1]);
- init_timer(&host->timer);
- host->timer.data = (unsigned long)host;
- host->timer.function = mmci_check_status;
- host->timer.expires = jiffies + HZ;
- add_timer(&host->timer);
-
return 0;
irq0_free:
@@ -781,8 +802,6 @@ static int __devexit mmci_remove(struct amba_device *dev)
if (mmc) {
struct mmci_host *host = mmc_priv(mmc);
- del_timer_sync(&host->timer);
-
mmc_remove_host(mmc);
writel(0, host->base + MMCIMASK0);
@@ -856,19 +875,28 @@ static struct amba_id mmci_ids[] = {
{
.id = 0x00041180,
.mask = 0x000fffff,
+ .data = &variant_arm,
},
{
.id = 0x00041181,
.mask = 0x000fffff,
+ .data = &variant_arm,
},
/* ST Micro variants */
{
.id = 0x00180180,
.mask = 0x00ffffff,
+ .data = &variant_u300,
},
{
.id = 0x00280180,
.mask = 0x00ffffff,
+ .data = &variant_u300,
+ },
+ {
+ .id = 0x00480180,
+ .mask = 0x00ffffff,
+ .data = &variant_ux500,
},
{ 0, 0 },
};
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index d77062e5e3af..68970cfb81e1 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -28,8 +28,6 @@
#define MCI_4BIT_BUS (1 << 11)
/* 8bit wide buses supported in ST Micro versions */
#define MCI_ST_8BIT_BUS (1 << 12)
-/* HW flow control on the ST Micro version */
-#define MCI_ST_FCEN (1 << 13)
#define MMCIARGUMENT 0x008
#define MMCICOMMAND 0x00c
@@ -145,6 +143,7 @@
#define NR_SG 16
struct clk;
+struct variant_data;
struct mmci_host {
void __iomem *base;
@@ -164,6 +163,7 @@ struct mmci_host {
unsigned int cclk;
u32 pwr;
struct mmci_platform_data *plat;
+ struct variant_data *variant;
u8 hw_designer;
u8 hw_revision:4;
@@ -171,42 +171,9 @@ struct mmci_host {
struct timer_list timer;
unsigned int oldstat;
- unsigned int sg_len;
-
/* pio stuff */
- struct scatterlist *sg_ptr;
- unsigned int sg_off;
+ struct sg_mapping_iter sg_miter;
unsigned int size;
struct regulator *vcc;
};
-static inline void mmci_init_sg(struct mmci_host *host, struct mmc_data *data)
-{
- /*
- * Ideally, we want the higher levels to pass us a scatter list.
- */
- host->sg_len = data->sg_len;
- host->sg_ptr = data->sg;
- host->sg_off = 0;
-}
-
-static inline int mmci_next_sg(struct mmci_host *host)
-{
- host->sg_ptr++;
- host->sg_off = 0;
- return --host->sg_len;
-}
-
-static inline char *mmci_kmap_atomic(struct mmci_host *host, unsigned long *flags)
-{
- struct scatterlist *sg = host->sg_ptr;
-
- local_irq_save(*flags);
- return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
-}
-
-static inline void mmci_kunmap_atomic(struct mmci_host *host, void *buffer, unsigned long *flags)
-{
- kunmap_atomic(buffer, KM_BIO_SRC_IRQ);
- local_irq_restore(*flags);
-}
diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index 3587d9922f28..71bbefc3544e 100644
--- a/drivers/rtc/rtc-pl031.c
+++ b/drivers/rtc/rtc-pl031.c
@@ -456,7 +456,7 @@ static struct rtc_class_ops stv2_pl031_ops = {
.irq_set_freq = pl031_irq_set_freq,
};
-static struct amba_id pl031_ids[] __initdata = {
+static struct amba_id pl031_ids[] = {
{
.id = 0x00041031,
.mask = 0x000fffff,
diff --git a/drivers/serial/amba-pl010.c b/drivers/serial/amba-pl010.c
index b09a638d051f..50441ffe8e38 100644
--- a/drivers/serial/amba-pl010.c
+++ b/drivers/serial/amba-pl010.c
@@ -782,7 +782,7 @@ static int pl010_resume(struct amba_device *dev)
return 0;
}
-static struct amba_id pl010_ids[] __initdata = {
+static struct amba_id pl010_ids[] = {
{
.id = 0x00041010,
.mask = 0x000fffff,
diff --git a/drivers/serial/amba-pl011.c b/drivers/serial/amba-pl011.c
index eb4cb480b93e..6ca7a44f29c2 100644
--- a/drivers/serial/amba-pl011.c
+++ b/drivers/serial/amba-pl011.c
@@ -69,9 +69,12 @@
struct uart_amba_port {
struct uart_port port;
struct clk *clk;
- unsigned int im; /* interrupt mask */
+ unsigned int im; /* interrupt mask */
unsigned int old_status;
- unsigned int ifls; /* vendor-specific */
+ unsigned int ifls; /* vendor-specific */
+ unsigned int lcrh_tx; /* vendor-specific */
+ unsigned int lcrh_rx; /* vendor-specific */
+ bool oversampling; /* vendor-specific */
bool autorts;
};
@@ -79,16 +82,25 @@ struct uart_amba_port {
struct vendor_data {
unsigned int ifls;
unsigned int fifosize;
+ unsigned int lcrh_tx;
+ unsigned int lcrh_rx;
+ bool oversampling;
};
static struct vendor_data vendor_arm = {
.ifls = UART011_IFLS_RX4_8|UART011_IFLS_TX4_8,
.fifosize = 16,
+ .lcrh_tx = UART011_LCRH,
+ .lcrh_rx = UART011_LCRH,
+ .oversampling = false,
};
static struct vendor_data vendor_st = {
.ifls = UART011_IFLS_RX_HALF|UART011_IFLS_TX_HALF,
.fifosize = 64,
+ .lcrh_tx = ST_UART011_LCRH_TX,
+ .lcrh_rx = ST_UART011_LCRH_RX,
+ .oversampling = true,
};
static void pl011_stop_tx(struct uart_port *port)
@@ -327,12 +339,12 @@ static void pl011_break_ctl(struct uart_port *port, int break_state)
unsigned int lcr_h;
spin_lock_irqsave(&uap->port.lock, flags);
- lcr_h = readw(uap->port.membase + UART011_LCRH);
+ lcr_h = readw(uap->port.membase + uap->lcrh_tx);
if (break_state == -1)
lcr_h |= UART01x_LCRH_BRK;
else
lcr_h &= ~UART01x_LCRH_BRK;
- writew(lcr_h, uap->port.membase + UART011_LCRH);
+ writew(lcr_h, uap->port.membase + uap->lcrh_tx);
spin_unlock_irqrestore(&uap->port.lock, flags);
}
@@ -393,7 +405,17 @@ static int pl011_startup(struct uart_port *port)
writew(cr, uap->port.membase + UART011_CR);
writew(0, uap->port.membase + UART011_FBRD);
writew(1, uap->port.membase + UART011_IBRD);
- writew(0, uap->port.membase + UART011_LCRH);
+ writew(0, uap->port.membase + uap->lcrh_rx);
+ if (uap->lcrh_tx != uap->lcrh_rx) {
+ int i;
+ /*
+ * Wait 10 PCLKs before writing LCRH_TX register,
+ * to get this delay write read only register 10 times
+ */
+ for (i = 0; i < 10; ++i)
+ writew(0xff, uap->port.membase + UART011_MIS);
+ writew(0, uap->port.membase + uap->lcrh_tx);
+ }
writew(0, uap->port.membase + UART01x_DR);
while (readw(uap->port.membase + UART01x_FR) & UART01x_FR_BUSY)
barrier();
@@ -422,10 +444,19 @@ static int pl011_startup(struct uart_port *port)
return retval;
}
+static void pl011_shutdown_channel(struct uart_amba_port *uap,
+ unsigned int lcrh)
+{
+ unsigned long val;
+
+ val = readw(uap->port.membase + lcrh);
+ val &= ~(UART01x_LCRH_BRK | UART01x_LCRH_FEN);
+ writew(val, uap->port.membase + lcrh);
+}
+
static void pl011_shutdown(struct uart_port *port)
{
struct uart_amba_port *uap = (struct uart_amba_port *)port;
- unsigned long val;
/*
* disable all interrupts
@@ -450,9 +481,9 @@ static void pl011_shutdown(struct uart_port *port)
/*
* disable break condition and fifos
*/
- val = readw(uap->port.membase + UART011_LCRH);
- val &= ~(UART01x_LCRH_BRK | UART01x_LCRH_FEN);
- writew(val, uap->port.membase + UART011_LCRH);
+ pl011_shutdown_channel(uap, uap->lcrh_rx);
+ if (uap->lcrh_rx != uap->lcrh_tx)
+ pl011_shutdown_channel(uap, uap->lcrh_tx);
/*
* Shut down the clock producer
@@ -472,8 +503,13 @@ pl011_set_termios(struct uart_port *port, struct ktermios *termios,
/*
* Ask the core to calculate the divisor for us.
*/
- baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
- quot = port->uartclk * 4 / baud;
+ baud = uart_get_baud_rate(port, termios, old, 0,
+ port->uartclk/(uap->oversampling ? 8 : 16));
+
+ if (baud > port->uartclk/16)
+ quot = DIV_ROUND_CLOSEST(port->uartclk * 8, baud);
+ else
+ quot = DIV_ROUND_CLOSEST(port->uartclk * 4, baud);
switch (termios->c_cflag & CSIZE) {
case CS5:
@@ -552,6 +588,13 @@ pl011_set_termios(struct uart_port *port, struct ktermios *termios,
uap->autorts = false;
}
+ if (uap->oversampling) {
+ if (baud > port->uartclk/16)
+ old_cr |= ST_UART011_CR_OVSFACT;
+ else
+ old_cr &= ~ST_UART011_CR_OVSFACT;
+ }
+
/* Set baud rate */
writew(quot & 0x3f, port->membase + UART011_FBRD);
writew(quot >> 6, port->membase + UART011_IBRD);
@@ -561,7 +604,17 @@ pl011_set_termios(struct uart_port *port, struct ktermios *termios,
* NOTE: MUST BE WRITTEN AFTER UARTLCR_M & UARTLCR_L
* ----------^----------^----------^----------^-----
*/
- writew(lcr_h, port->membase + UART011_LCRH);
+ writew(lcr_h, port->membase + uap->lcrh_rx);
+ if (uap->lcrh_rx != uap->lcrh_tx) {
+ int i;
+ /*
+ * Wait 10 PCLKs before writing LCRH_TX register,
+ * to get this delay write read only register 10 times
+ */
+ for (i = 0; i < 10; ++i)
+ writew(0xff, uap->port.membase + UART011_MIS);
+ writew(lcr_h, port->membase + uap->lcrh_tx);
+ }
writew(old_cr, port->membase + UART011_CR);
spin_unlock_irqrestore(&port->lock, flags);
@@ -688,7 +741,7 @@ pl011_console_get_options(struct uart_amba_port *uap, int *baud,
if (readw(uap->port.membase + UART011_CR) & UART01x_CR_UARTEN) {
unsigned int lcr_h, ibrd, fbrd;
- lcr_h = readw(uap->port.membase + UART011_LCRH);
+ lcr_h = readw(uap->port.membase + uap->lcrh_tx);
*parity = 'n';
if (lcr_h & UART01x_LCRH_PEN) {
@@ -707,6 +760,12 @@ pl011_console_get_options(struct uart_amba_port *uap, int *baud,
fbrd = readw(uap->port.membase + UART011_FBRD);
*baud = uap->port.uartclk * 4 / (64 * ibrd + fbrd);
+
+ if (uap->oversampling) {
+ if (readw(uap->port.membase + UART011_CR)
+ & ST_UART011_CR_OVSFACT)
+ *baud *= 2;
+ }
}
}
@@ -800,6 +859,9 @@ static int pl011_probe(struct amba_device *dev, struct amba_id *id)
}
uap->ifls = vendor->ifls;
+ uap->lcrh_rx = vendor->lcrh_rx;
+ uap->lcrh_tx = vendor->lcrh_tx;
+ uap->oversampling = vendor->oversampling;
uap->port.dev = &dev->dev;
uap->port.mapbase = dev->res.start;
uap->port.membase = base;
@@ -868,7 +930,7 @@ static int pl011_resume(struct amba_device *dev)
}
#endif
-static struct amba_id pl011_ids[] __initdata = {
+static struct amba_id pl011_ids[] = {
{
.id = 0x00041011,
.mask = 0x000fffff,