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Merge remote-tracking branches 'spi/topic/omap-uwire', 'spi/topic/omap100k', 'spi/topic/omap2', 'spi/topic/orion', 'spi/topic/pl022', 'spi/topic/qup', 'spi/topic/rspi' and 'spi/topic/s3c24xx' into spi-next

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This commit is contained in:
Mark Brown 2014-03-30 00:51:27 +00:00
commit 1752368064
15 changed files with 1740 additions and 533 deletions
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85
Documentation/devicetree/bindings/spi/qcom,spi-qup.txt Normal file
View file

@ -0,0 +1,85 @@
Qualcomm Universal Peripheral (QUP) Serial Peripheral Interface (SPI)
The QUP core is an AHB slave that provides a common data path (an output FIFO
and an input FIFO) for serial peripheral interface (SPI) mini-core.
SPI in master mode supports up to 50MHz, up to four chip selects, programmable
data path from 4 bits to 32 bits and numerous protocol variants.
Required properties:
- compatible: Should contain "qcom,spi-qup-v2.1.1" or "qcom,spi-qup-v2.2.1"
- reg: Should contain base register location and length
- interrupts: Interrupt number used by this controller
- clocks: Should contain the core clock and the AHB clock.
- clock-names: Should be "core" for the core clock and "iface" for the
AHB clock.
- #address-cells: Number of cells required to define a chip select
address on the SPI bus. Should be set to 1.
- #size-cells: Should be zero.
Optional properties:
- spi-max-frequency: Specifies maximum SPI clock frequency,
Units - Hz. Definition as per
Documentation/devicetree/bindings/spi/spi-bus.txt
SPI slave nodes must be children of the SPI master node and can contain
properties described in Documentation/devicetree/bindings/spi/spi-bus.txt
Example:
spi_8: spi@f9964000 { /* BLSP2 QUP2 */
compatible = "qcom,spi-qup-v2";
#address-cells = <1>;
#size-cells = <0>;
reg = <0xf9964000 0x1000>;
interrupts = <0 102 0>;
spi-max-frequency = <19200000>;
clocks = <&gcc GCC_BLSP2_QUP2_SPI_APPS_CLK>, <&gcc GCC_BLSP2_AHB_CLK>;
clock-names = "core", "iface";
pinctrl-names = "default";
pinctrl-0 = <&spi8_default>;
device@0 {
compatible = "arm,pl022-dummy";
#address-cells = <1>;
#size-cells = <1>;
reg = <0>; /* Chip select 0 */
spi-max-frequency = <19200000>;
spi-cpol;
};
device@1 {
compatible = "arm,pl022-dummy";
#address-cells = <1>;
#size-cells = <1>;
reg = <1>; /* Chip select 1 */
spi-max-frequency = <9600000>;
spi-cpha;
};
device@2 {
compatible = "arm,pl022-dummy";
#address-cells = <1>;
#size-cells = <1>;
reg = <2>; /* Chip select 2 */
spi-max-frequency = <19200000>;
spi-cpol;
spi-cpha;
};
device@3 {
compatible = "arm,pl022-dummy";
#address-cells = <1>;
#size-cells = <1>;
reg = <3>; /* Chip select 3 */
spi-max-frequency = <19200000>;
spi-cpol;
spi-cpha;
spi-cs-high;
};
};

61
Documentation/devicetree/bindings/spi/spi-rspi.txt Normal file
View file

@ -0,0 +1,61 @@
Device tree configuration for Renesas RSPI/QSPI driver
Required properties:
- compatible : For Renesas Serial Peripheral Interface on legacy SH:
"renesas,rspi-<soctype>", "renesas,rspi" as fallback.
For Renesas Serial Peripheral Interface on RZ/A1H:
"renesas,rspi-<soctype>", "renesas,rspi-rz" as fallback.
For Quad Serial Peripheral Interface on R-Car Gen2:
"renesas,qspi-<soctype>", "renesas,qspi" as fallback.
Examples with soctypes are:
- "renesas,rspi-sh7757" (SH)
- "renesas,rspi-r7s72100" (RZ/A1H)
- "renesas,qspi-r8a7790" (R-Car H2)
- "renesas,qspi-r8a7791" (R-Car M2)
- reg : Address start and address range size of the device
- interrupts : A list of interrupt-specifiers, one for each entry in
interrupt-names.
If interrupt-names is not present, an interrupt specifier
for a single muxed interrupt.
- interrupt-names : A list of interrupt names. Should contain (if present):
- "error" for SPEI,
- "rx" for SPRI,
- "tx" to SPTI,
- "mux" for a single muxed interrupt.
- interrupt-parent : The phandle for the interrupt controller that
services interrupts for this device.
- num-cs : Number of chip selects. Some RSPI cores have more than 1.
- #address-cells : Must be <1>
- #size-cells : Must be <0>
Optional properties:
- clocks : Must contain a reference to the functional clock.
Pinctrl properties might be needed, too. See
Documentation/devicetree/bindings/pinctrl/renesas,*.
Examples:
spi0: spi@e800c800 {
compatible = "renesas,rspi-r7s72100", "renesas,rspi-rz";
reg = <0xe800c800 0x24>;
interrupts = <0 238 IRQ_TYPE_LEVEL_HIGH>,
<0 239 IRQ_TYPE_LEVEL_HIGH>,
<0 240 IRQ_TYPE_LEVEL_HIGH>;
interrupt-names = "error", "rx", "tx";
interrupt-parent = <&gic>;
num-cs = <1>;
#address-cells = <1>;
#size-cells = <0>;
};
spi: spi@e6b10000 {
compatible = "renesas,qspi-r8a7791", "renesas,qspi";
reg = <0 0xe6b10000 0 0x2c>;
interrupt-parent = <&gic>;
interrupts = <0 184 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&mstp9_clks R8A7791_CLK_QSPI_MOD>;
num-cs = <1>;
#address-cells = <1>;
#size-cells = <0>;
};

3
drivers/base/power/Makefile
View file

@ -1,6 +1,5 @@
obj-$(CONFIG_PM) += sysfs.o generic_ops.o common.o qos.o
obj-$(CONFIG_PM) += sysfs.o generic_ops.o common.o qos.o runtime.o
obj-$(CONFIG_PM_SLEEP) += main.o wakeup.o
obj-$(CONFIG_PM_RUNTIME) += runtime.o
obj-$(CONFIG_PM_TRACE_RTC) += trace.o
obj-$(CONFIG_PM_OPP) += opp.o
obj-$(CONFIG_PM_GENERIC_DOMAINS) += domain.o domain_governor.o

162
drivers/base/power/runtime.c
View file

@ -13,6 +13,43 @@
#include <trace/events/rpm.h>
#include "power.h"
#define RPM_GET_CALLBACK(dev, cb) \
({ \
int (*__rpm_cb)(struct device *__d); \
\
if (dev->pm_domain) \
__rpm_cb = dev->pm_domain->ops.cb; \
else if (dev->type && dev->type->pm) \
__rpm_cb = dev->type->pm->cb; \
else if (dev->class && dev->class->pm) \
__rpm_cb = dev->class->pm->cb; \
else if (dev->bus && dev->bus->pm) \
__rpm_cb = dev->bus->pm->cb; \
else \
__rpm_cb = NULL; \
\
if (!__rpm_cb && dev->driver && dev->driver->pm) \
__rpm_cb = dev->driver->pm->cb; \
\
__rpm_cb; \
})
static int (*rpm_get_suspend_cb(struct device *dev))(struct device *)
{
return RPM_GET_CALLBACK(dev, runtime_suspend);
}
static int (*rpm_get_resume_cb(struct device *dev))(struct device *)
{
return RPM_GET_CALLBACK(dev, runtime_resume);
}
#ifdef CONFIG_PM_RUNTIME
static int (*rpm_get_idle_cb(struct device *dev))(struct device *)
{
return RPM_GET_CALLBACK(dev, runtime_idle);
}
static int rpm_resume(struct device *dev, int rpmflags);
static int rpm_suspend(struct device *dev, int rpmflags);
@ -310,19 +347,7 @@ static int rpm_idle(struct device *dev, int rpmflags)
dev->power.idle_notification = true;
if (dev->pm_domain)
callback = dev->pm_domain->ops.runtime_idle;
else if (dev->type && dev->type->pm)
callback = dev->type->pm->runtime_idle;
else if (dev->class && dev->class->pm)
callback = dev->class->pm->runtime_idle;
else if (dev->bus && dev->bus->pm)
callback = dev->bus->pm->runtime_idle;
else
callback = NULL;
if (!callback && dev->driver && dev->driver->pm)
callback = dev->driver->pm->runtime_idle;
callback = rpm_get_idle_cb(dev);
if (callback)
retval = __rpm_callback(callback, dev);
@ -492,19 +517,7 @@ static int rpm_suspend(struct device *dev, int rpmflags)
__update_runtime_status(dev, RPM_SUSPENDING);
if (dev->pm_domain)
callback = dev->pm_domain->ops.runtime_suspend;
else if (dev->type && dev->type->pm)
callback = dev->type->pm->runtime_suspend;
else if (dev->class && dev->class->pm)
callback = dev->class->pm->runtime_suspend;
else if (dev->bus && dev->bus->pm)
callback = dev->bus->pm->runtime_suspend;
else
callback = NULL;
if (!callback && dev->driver && dev->driver->pm)
callback = dev->driver->pm->runtime_suspend;
callback = rpm_get_suspend_cb(dev);
retval = rpm_callback(callback, dev);
if (retval)
@ -724,19 +737,7 @@ static int rpm_resume(struct device *dev, int rpmflags)
__update_runtime_status(dev, RPM_RESUMING);
if (dev->pm_domain)
callback = dev->pm_domain->ops.runtime_resume;
else if (dev->type && dev->type->pm)
callback = dev->type->pm->runtime_resume;
else if (dev->class && dev->class->pm)
callback = dev->class->pm->runtime_resume;
else if (dev->bus && dev->bus->pm)
callback = dev->bus->pm->runtime_resume;
else
callback = NULL;
if (!callback && dev->driver && dev->driver->pm)
callback = dev->driver->pm->runtime_resume;
callback = rpm_get_resume_cb(dev);
retval = rpm_callback(callback, dev);
if (retval) {
@ -1401,3 +1402,86 @@ void pm_runtime_remove(struct device *dev)
if (dev->power.irq_safe && dev->parent)
pm_runtime_put(dev->parent);
}
#endif
/**
* pm_runtime_force_suspend - Force a device into suspend state if needed.
* @dev: Device to suspend.
*
* Disable runtime PM so we safely can check the device's runtime PM status and
* if it is active, invoke it's .runtime_suspend callback to bring it into
* suspend state. Keep runtime PM disabled to preserve the state unless we
* encounter errors.
*
* Typically this function may be invoked from a system suspend callback to make
* sure the device is put into low power state.
*/
int pm_runtime_force_suspend(struct device *dev)
{
int (*callback)(struct device *);
int ret = 0;
pm_runtime_disable(dev);
/*
* Note that pm_runtime_status_suspended() returns false while
* !CONFIG_PM_RUNTIME, which means the device will be put into low
* power state.
*/
if (pm_runtime_status_suspended(dev))
return 0;
callback = rpm_get_suspend_cb(dev);
if (!callback) {
ret = -ENOSYS;
goto err;
}
ret = callback(dev);
if (ret)
goto err;
pm_runtime_set_suspended(dev);
return 0;
err:
pm_runtime_enable(dev);
return ret;
}
EXPORT_SYMBOL_GPL(pm_runtime_force_suspend);
/**
* pm_runtime_force_resume - Force a device into resume state.
* @dev: Device to resume.
*
* Prior invoking this function we expect the user to have brought the device
* into low power state by a call to pm_runtime_force_suspend(). Here we reverse
* those actions and brings the device into full power. We update the runtime PM
* status and re-enables runtime PM.
*
* Typically this function may be invoked from a system resume callback to make
* sure the device is put into full power state.
*/
int pm_runtime_force_resume(struct device *dev)
{
int (*callback)(struct device *);
int ret = 0;
callback = rpm_get_resume_cb(dev);
if (!callback) {
ret = -ENOSYS;
goto out;
}
ret = callback(dev);
if (ret)
goto out;
pm_runtime_set_active(dev);
pm_runtime_mark_last_busy(dev);
out:
pm_runtime_enable(dev);
return ret;
}
EXPORT_SYMBOL_GPL(pm_runtime_force_resume);

15
drivers/spi/Kconfig
View file

@ -307,7 +307,7 @@ config SPI_OMAP_UWIRE
config SPI_OMAP24XX
tristate "McSPI driver for OMAP"
depends on ARM || ARM64 || AVR32 || HEXAGON || MIPS || SH
depends on ARM || ARM64 || AVR32 || HEXAGON || MIPS || SUPERH
depends on ARCH_OMAP2PLUS || COMPILE_TEST
help
SPI master controller for OMAP24XX and later Multichannel SPI
@ -381,6 +381,19 @@ config SPI_RSPI
help
SPI driver for Renesas RSPI and QSPI blocks.
config SPI_QUP
tristate "Qualcomm SPI controller with QUP interface"
depends on ARCH_MSM_DT || (ARM && COMPILE_TEST)
help
Qualcomm Universal Peripheral (QUP) core is an AHB slave that
provides a common data path (an output FIFO and an input FIFO)
for serial peripheral interface (SPI) mini-core. SPI in master
mode supports up to 50MHz, up to four chip selects, programmable
data path from 4 bits to 32 bits and numerous protocol variants.
This driver can also be built as a module. If so, the module
will be called spi_qup.
config SPI_S3C24XX
tristate "Samsung S3C24XX series SPI"
depends on ARCH_S3C24XX

1
drivers/spi/Makefile
View file

@ -59,6 +59,7 @@ spi-pxa2xx-platform-$(CONFIG_SPI_PXA2XX_PXADMA) += spi-pxa2xx-pxadma.o
spi-pxa2xx-platform-$(CONFIG_SPI_PXA2XX_DMA) += spi-pxa2xx-dma.o
obj-$(CONFIG_SPI_PXA2XX) += spi-pxa2xx-platform.o
obj-$(CONFIG_SPI_PXA2XX_PCI) += spi-pxa2xx-pci.o
obj-$(CONFIG_SPI_QUP) += spi-qup.o
obj-$(CONFIG_SPI_RSPI) += spi-rspi.o
obj-$(CONFIG_SPI_S3C24XX) += spi-s3c24xx-hw.o
spi-s3c24xx-hw-y := spi-s3c24xx.o

52
drivers/spi/spi-omap-100k.c
View file

@ -83,15 +83,11 @@
#define SPI_SHUTDOWN 1
struct omap1_spi100k {
struct spi_master *master;
struct clk *ick;
struct clk *fck;
/* Virtual base address of the controller */
void __iomem *base;
/* State of the SPI */
unsigned int state;
};
struct omap1_spi100k_cs {
@ -99,13 +95,6 @@ struct omap1_spi100k_cs {
int word_len;
};
#define MOD_REG_BIT(val, mask, set) do { \
if (set) \
val |= mask; \
else \
val &= ~mask; \
} while (0)
static void spi100k_enable_clock(struct spi_master *master)
{
unsigned int val;
@ -139,7 +128,7 @@ static void spi100k_write_data(struct spi_master *master, int len, int data)
}
spi100k_enable_clock(master);
writew( data , spi100k->base + SPI_TX_MSB);
writew(data , spi100k->base + SPI_TX_MSB);
writew(SPI_CTRL_SEN(0) |
SPI_CTRL_WORD_SIZE(len) |
@ -147,7 +136,8 @@ static void spi100k_write_data(struct spi_master *master, int len, int data)
spi100k->base + SPI_CTRL);
/* Wait for bit ack send change */
while((readw(spi100k->base + SPI_STATUS) & SPI_STATUS_WE) != SPI_STATUS_WE);
while ((readw(spi100k->base + SPI_STATUS) & SPI_STATUS_WE) != SPI_STATUS_WE)
;
udelay(1000);
spi100k_disable_clock(master);
@ -155,7 +145,7 @@ static void spi100k_write_data(struct spi_master *master, int len, int data)
static int spi100k_read_data(struct spi_master *master, int len)
{
int dataH,dataL;
int dataH, dataL;
struct omap1_spi100k *spi100k = spi_master_get_devdata(master);
/* Always do at least 16 bits */
@ -168,7 +158,8 @@ static int spi100k_read_data(struct spi_master *master, int len)
SPI_CTRL_RD,
spi100k->base + SPI_CTRL);
while((readw(spi100k->base + SPI_STATUS) & SPI_STATUS_RD) != SPI_STATUS_RD);
while ((readw(spi100k->base + SPI_STATUS) & SPI_STATUS_RD) != SPI_STATUS_RD)
;
udelay(1000);
dataL = readw(spi100k->base + SPI_RX_LSB);
@ -204,12 +195,10 @@ static void omap1_spi100k_force_cs(struct omap1_spi100k *spi100k, int enable)
static unsigned
omap1_spi100k_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
{
struct omap1_spi100k *spi100k;
struct omap1_spi100k_cs *cs = spi->controller_state;
unsigned int count, c;
int word_len;
spi100k = spi_master_get_devdata(spi->master);
count = xfer->len;
c = count;
word_len = cs->word_len;
@ -221,12 +210,12 @@ omap1_spi100k_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
rx = xfer->rx_buf;
tx = xfer->tx_buf;
do {
c-=1;
c -= 1;
if (xfer->tx_buf != NULL)
spi100k_write_data(spi->master, word_len, *tx++);
if (xfer->rx_buf != NULL)
*rx++ = spi100k_read_data(spi->master, word_len);
} while(c);
} while (c);
} else if (word_len <= 16) {
u16 *rx;
const u16 *tx;
@ -234,12 +223,12 @@ omap1_spi100k_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
rx = xfer->rx_buf;
tx = xfer->tx_buf;
do {
c-=2;
c -= 2;
if (xfer->tx_buf != NULL)
spi100k_write_data(spi->master,word_len, *tx++);
spi100k_write_data(spi->master, word_len, *tx++);
if (xfer->rx_buf != NULL)
*rx++ = spi100k_read_data(spi->master,word_len);
} while(c);
*rx++ = spi100k_read_data(spi->master, word_len);
} while (c);
} else if (word_len <= 32) {
u32 *rx;
const u32 *tx;
@ -247,12 +236,12 @@ omap1_spi100k_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
rx = xfer->rx_buf;
tx = xfer->tx_buf;
do {
c-=4;
c -= 4;
if (xfer->tx_buf != NULL)
spi100k_write_data(spi->master,word_len, *tx);
spi100k_write_data(spi->master, word_len, *tx);
if (xfer->rx_buf != NULL)
*rx = spi100k_read_data(spi->master,word_len);
} while(c);
*rx = spi100k_read_data(spi->master, word_len);
} while (c);
}
return count - c;
}
@ -294,7 +283,7 @@ static int omap1_spi100k_setup(struct spi_device *spi)
spi100k = spi_master_get_devdata(spi->master);
if (!cs) {
cs = kzalloc(sizeof *cs, GFP_KERNEL);
cs = devm_kzalloc(&spi->dev, sizeof(*cs), GFP_KERNEL);
if (!cs)
return -ENOMEM;
cs->base = spi100k->base + spi->chip_select * 0x14;
@ -411,14 +400,14 @@ static int omap1_spi100k_probe(struct platform_device *pdev)
if (!pdev->id)
return -EINVAL;
master = spi_alloc_master(&pdev->dev, sizeof *spi100k);
master = spi_alloc_master(&pdev->dev, sizeof(*spi100k));
if (master == NULL) {
dev_dbg(&pdev->dev, "master allocation failed\n");
return -ENOMEM;
}
if (pdev->id != -1)
master->bus_num = pdev->id;
master->bus_num = pdev->id;
master->setup = omap1_spi100k_setup;
master->transfer_one_message = omap1_spi100k_transfer_one_message;
@ -434,7 +423,6 @@ static int omap1_spi100k_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, master);
spi100k = spi_master_get_devdata(master);
spi100k->master = master;
/*
* The memory region base address is taken as the platform_data.
@ -461,8 +449,6 @@ static int omap1_spi100k_probe(struct platform_device *pdev)
if (status < 0)
goto err;
spi100k->state = SPI_RUNNING;
return status;
err:

23
drivers/spi/spi-omap-uwire.c
View file

@ -99,7 +99,6 @@ struct uwire_spi {
};
struct uwire_state {
unsigned bits_per_word;
unsigned div1_idx;
};
@ -210,9 +209,8 @@ static void uwire_chipselect(struct spi_device *spi, int value)
static int uwire_txrx(struct spi_device *spi, struct spi_transfer *t)
{
struct uwire_state *ust = spi->controller_state;
unsigned len = t->len;
unsigned bits = ust->bits_per_word;
unsigned bits = t->bits_per_word ? : spi->bits_per_word;
unsigned bytes;
u16 val, w;
int status = 0;
@ -220,10 +218,6 @@ static int uwire_txrx(struct spi_device *spi, struct spi_transfer *t)
if (!t->tx_buf && !t->rx_buf)
return 0;
/* Microwire doesn't read and write concurrently */
if (t->tx_buf && t->rx_buf)
return -EPERM;
w = spi->chip_select << 10;
w |= CS_CMD;
@ -322,7 +316,6 @@ static int uwire_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
struct uwire_state *ust = spi->controller_state;
struct uwire_spi *uwire;
unsigned flags = 0;
unsigned bits;
unsigned hz;
unsigned long rate;
int div1_idx;
@ -332,17 +325,6 @@ static int uwire_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
uwire = spi_master_get_devdata(spi->master);
bits = spi->bits_per_word;
if (t != NULL && t->bits_per_word)
bits = t->bits_per_word;
if (bits > 16) {
pr_debug("%s: wordsize %d?\n", dev_name(&spi->dev), bits);
status = -ENODEV;
goto done;
}
ust->bits_per_word = bits;
/* mode 0..3, clock inverted separately;
* standard nCS signaling;
* don't treat DI=high as "not ready"
@ -496,6 +478,7 @@ static int uwire_probe(struct platform_device *pdev)
status = PTR_ERR(uwire->ck);
dev_dbg(&pdev->dev, "no functional clock?\n");
spi_master_put(master);
iounmap(uwire_base);
return status;
}
clk_enable(uwire->ck);
@ -509,7 +492,7 @@ static int uwire_probe(struct platform_device *pdev)
/* the spi->mode bits understood by this driver: */
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 16);
master->flags = SPI_MASTER_HALF_DUPLEX;
master->bus_num = 2; /* "official" */

64
drivers/spi/spi-omap2-mcspi.c
View file

@ -44,6 +44,7 @@
#include <linux/platform_data/spi-omap2-mcspi.h>
#define OMAP2_MCSPI_MAX_FREQ 48000000
#define OMAP2_MCSPI_MAX_DIVIDER 4096
#define OMAP2_MCSPI_MAX_FIFODEPTH 64
#define OMAP2_MCSPI_MAX_FIFOWCNT 0xFFFF
#define SPI_AUTOSUSPEND_TIMEOUT 2000
@ -88,6 +89,7 @@
#define OMAP2_MCSPI_CHCONF_FORCE BIT(20)
#define OMAP2_MCSPI_CHCONF_FFET BIT(27)
#define OMAP2_MCSPI_CHCONF_FFER BIT(28)
#define OMAP2_MCSPI_CHCONF_CLKG BIT(29)
#define OMAP2_MCSPI_CHSTAT_RXS BIT(0)
#define OMAP2_MCSPI_CHSTAT_TXS BIT(1)
@ -95,6 +97,7 @@
#define OMAP2_MCSPI_CHSTAT_TXFFE BIT(3)
#define OMAP2_MCSPI_CHCTRL_EN BIT(0)
#define OMAP2_MCSPI_CHCTRL_EXTCLK_MASK (0xff << 8)
#define OMAP2_MCSPI_WAKEUPENABLE_WKEN BIT(0)
@ -148,7 +151,7 @@ struct omap2_mcspi_cs {
int word_len;
struct list_head node;
/* Context save and restore shadow register */
u32 chconf0;
u32 chconf0, chctrl0;
};
static inline void mcspi_write_reg(struct spi_master *master,
@ -229,10 +232,16 @@ static void omap2_mcspi_set_dma_req(const struct spi_device *spi,
static void omap2_mcspi_set_enable(const struct spi_device *spi, int enable)
{
struct omap2_mcspi_cs *cs = spi->controller_state;
u32 l;
l = enable ? OMAP2_MCSPI_CHCTRL_EN : 0;
mcspi_write_cs_reg(spi, OMAP2_MCSPI_CHCTRL0, l);
l = cs->chctrl0;
if (enable)
l |= OMAP2_MCSPI_CHCTRL_EN;
else
l &= ~OMAP2_MCSPI_CHCTRL_EN;
cs->chctrl0 = l;
mcspi_write_cs_reg(spi, OMAP2_MCSPI_CHCTRL0, cs->chctrl0);
/* Flash post-writes */
mcspi_read_cs_reg(spi, OMAP2_MCSPI_CHCTRL0);
}
@ -839,7 +848,7 @@ static int omap2_mcspi_setup_transfer(struct spi_device *spi,
struct omap2_mcspi_cs *cs = spi->controller_state;
struct omap2_mcspi *mcspi;
struct spi_master *spi_cntrl;
u32 l = 0, div = 0;
u32 l = 0, clkd = 0, div, extclk = 0, clkg = 0;
u8 word_len = spi->bits_per_word;
u32 speed_hz = spi->max_speed_hz;
@ -855,7 +864,17 @@ static int omap2_mcspi_setup_transfer(struct spi_device *spi,
speed_hz = t->speed_hz;
speed_hz = min_t(u32, speed_hz, OMAP2_MCSPI_MAX_FREQ);
div = omap2_mcspi_calc_divisor(speed_hz);
if (speed_hz < (OMAP2_MCSPI_MAX_FREQ / OMAP2_MCSPI_MAX_DIVIDER)) {
clkd = omap2_mcspi_calc_divisor(speed_hz);
speed_hz = OMAP2_MCSPI_MAX_FREQ >> clkd;
clkg = 0;
} else {
div = (OMAP2_MCSPI_MAX_FREQ + speed_hz - 1) / speed_hz;
speed_hz = OMAP2_MCSPI_MAX_FREQ / div;
clkd = (div - 1) & 0xf;
extclk = (div - 1) >> 4;
clkg = OMAP2_MCSPI_CHCONF_CLKG;
}
l = mcspi_cached_chconf0(spi);
@ -884,7 +903,16 @@ static int omap2_mcspi_setup_transfer(struct spi_device *spi,
/* set clock divisor */
l &= ~OMAP2_MCSPI_CHCONF_CLKD_MASK;
l |= div << 2;
l |= clkd << 2;
/* set clock granularity */
l &= ~OMAP2_MCSPI_CHCONF_CLKG;
l |= clkg;
if (clkg) {
cs->chctrl0 &= ~OMAP2_MCSPI_CHCTRL_EXTCLK_MASK;
cs->chctrl0 |= extclk << 8;
mcspi_write_cs_reg(spi, OMAP2_MCSPI_CHCTRL0, cs->chctrl0);
}
/* set SPI mode 0..3 */
if (spi->mode & SPI_CPOL)
@ -899,7 +927,7 @@ static int omap2_mcspi_setup_transfer(struct spi_device *spi,
mcspi_write_chconf0(spi, l);
dev_dbg(&spi->dev, "setup: speed %d, sample %s edge, clk %s\n",
OMAP2_MCSPI_MAX_FREQ >> div,
speed_hz,
(spi->mode & SPI_CPHA) ? "trailing" : "leading",
(spi->mode & SPI_CPOL) ? "inverted" : "normal");
@ -971,6 +999,7 @@ static int omap2_mcspi_setup(struct spi_device *spi)
cs->base = mcspi->base + spi->chip_select * 0x14;
cs->phys = mcspi->phys + spi->chip_select * 0x14;
cs->chconf0 = 0;
cs->chctrl0 = 0;
spi->controller_state = cs;
/* Link this to context save list */
list_add_tail(&cs->node, &ctx->cs);
@ -1056,12 +1085,15 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
status = -EINVAL;
break;
}
if (par_override || t->speed_hz || t->bits_per_word) {
if (par_override ||
(t->speed_hz != spi->max_speed_hz) ||
(t->bits_per_word != spi->bits_per_word)) {
par_override = 1;
status = omap2_mcspi_setup_transfer(spi, t);
if (status < 0)
break;
if (!t->speed_hz && !t->bits_per_word)
if (t->speed_hz == spi->max_speed_hz &&
t->bits_per_word == spi->bits_per_word)
par_override = 0;
}
if (cd && cd->cs_per_word) {
@ -1175,16 +1207,12 @@ static int omap2_mcspi_transfer_one_message(struct spi_master *master,
m->actual_length = 0;
m->status = 0;
/* reject invalid messages and transfers */
if (list_empty(&m->transfers))
return -EINVAL;
list_for_each_entry(t, &m->transfers, transfer_list) {
const void *tx_buf = t->tx_buf;
void *rx_buf = t->rx_buf;
unsigned len = t->len;
if (t->speed_hz > OMAP2_MCSPI_MAX_FREQ
|| (len && !(rx_buf || tx_buf))) {
if ((len && !(rx_buf || tx_buf))) {
dev_dbg(mcspi->dev, "transfer: %d Hz, %d %s%s, %d bpw\n",
t->speed_hz,
len,
@ -1193,12 +1221,6 @@ static int omap2_mcspi_transfer_one_message(struct spi_master *master,
t->bits_per_word);
return -EINVAL;
}
if (t->speed_hz && t->speed_hz < (OMAP2_MCSPI_MAX_FREQ >> 15)) {
dev_dbg(mcspi->dev, "speed_hz %d below minimum %d Hz\n",
t->speed_hz,
OMAP2_MCSPI_MAX_FREQ >> 15);
return -EINVAL;
}
if (m->is_dma_mapped || len < DMA_MIN_BYTES)
continue;
@ -1310,6 +1332,8 @@ static int omap2_mcspi_probe(struct platform_device *pdev)
master->transfer_one_message = omap2_mcspi_transfer_one_message;
master->cleanup = omap2_mcspi_cleanup;
master->dev.of_node = node;
master->max_speed_hz = OMAP2_MCSPI_MAX_FREQ;
master->min_speed_hz = OMAP2_MCSPI_MAX_FREQ >> 15;
platform_set_drvdata(pdev, master);

79
drivers/spi/spi-orion.c
View file

@ -42,8 +42,6 @@
struct orion_spi {
struct spi_master *master;
void __iomem *base;
unsigned int max_speed;
unsigned int min_speed;
struct clk *clk;
};
@ -74,23 +72,6 @@ orion_spi_clrbits(struct orion_spi *orion_spi, u32 reg, u32 mask)
writel(val, reg_addr);
}
static int orion_spi_set_transfer_size(struct orion_spi *orion_spi, int size)
{
if (size == 16) {
orion_spi_setbits(orion_spi, ORION_SPI_IF_CONFIG_REG,
ORION_SPI_IF_8_16_BIT_MODE);
} else if (size == 8) {
orion_spi_clrbits(orion_spi, ORION_SPI_IF_CONFIG_REG,
ORION_SPI_IF_8_16_BIT_MODE);
} else {
pr_debug("Bad bits per word value %d (only 8 or 16 are allowed).\n",
size);
return -EINVAL;
}
return 0;
}
static int orion_spi_baudrate_set(struct spi_device *spi, unsigned int speed)
{
u32 tclk_hz;
@ -169,7 +150,14 @@ orion_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
if (rc)
return rc;
return orion_spi_set_transfer_size(orion_spi, bits_per_word);
if (bits_per_word == 16)
orion_spi_setbits(orion_spi, ORION_SPI_IF_CONFIG_REG,
ORION_SPI_IF_8_16_BIT_MODE);
else
orion_spi_clrbits(orion_spi, ORION_SPI_IF_CONFIG_REG,
ORION_SPI_IF_8_16_BIT_MODE);
return 0;
}
static void orion_spi_set_cs(struct orion_spi *orion_spi, int enable)
@ -259,11 +247,9 @@ orion_spi_write_read_16bit(struct spi_device *spi,
static unsigned int
orion_spi_write_read(struct spi_device *spi, struct spi_transfer *xfer)
{
struct orion_spi *orion_spi;
unsigned int count;
int word_len;
orion_spi = spi_master_get_devdata(spi->master);
word_len = spi->bits_per_word;
count = xfer->len;
@ -309,27 +295,6 @@ static int orion_spi_transfer_one_message(struct spi_master *master,
goto msg_done;
list_for_each_entry(t, &m->transfers, transfer_list) {
/* make sure buffer length is even when working in 16
* bit mode*/
if ((t->bits_per_word == 16) && (t->len & 1)) {
dev_err(&spi->dev,
"message rejected : "
"odd data length %d while in 16 bit mode\n",
t->len);
status = -EIO;
goto msg_done;
}
if (t->speed_hz && t->speed_hz < orion_spi->min_speed) {
dev_err(&spi->dev,
"message rejected : "
"device min speed (%d Hz) exceeds "
"required transfer speed (%d Hz)\n",
orion_spi->min_speed, t->speed_hz);
status = -EIO;
goto msg_done;
}
if (par_override || t->speed_hz || t->bits_per_word) {
par_override = 1;
status = orion_spi_setup_transfer(spi, t);
@ -374,28 +339,6 @@ static int orion_spi_reset(struct orion_spi *orion_spi)
return 0;
}
static int orion_spi_setup(struct spi_device *spi)
{
struct orion_spi *orion_spi;
orion_spi = spi_master_get_devdata(spi->master);
if ((spi->max_speed_hz == 0)
|| (spi->max_speed_hz > orion_spi->max_speed))
spi->max_speed_hz = orion_spi->max_speed;
if (spi->max_speed_hz < orion_spi->min_speed) {
dev_err(&spi->dev, "setup: requested speed too low %d Hz\n",
spi->max_speed_hz);
return -EINVAL;
}
/*
* baudrate & width will be set orion_spi_setup_transfer
*/
return 0;
}
static int orion_spi_probe(struct platform_device *pdev)
{
struct spi_master *master;
@ -424,9 +367,9 @@ static int orion_spi_probe(struct platform_device *pdev)
/* we support only mode 0, and no options */
master->mode_bits = SPI_CPHA | SPI_CPOL;
master->setup = orion_spi_setup;
master->transfer_one_message = orion_spi_transfer_one_message;
master->num_chipselect = ORION_NUM_CHIPSELECTS;
master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(16);
platform_set_drvdata(pdev, master);
@ -442,8 +385,8 @@ static int orion_spi_probe(struct platform_device *pdev)
clk_prepare(spi->clk);
clk_enable(spi->clk);
tclk_hz = clk_get_rate(spi->clk);
spi->max_speed = DIV_ROUND_UP(tclk_hz, 4);
spi->min_speed = DIV_ROUND_UP(tclk_hz, 30);
master->max_speed_hz = DIV_ROUND_UP(tclk_hz, 4);
master->min_speed_hz = DIV_ROUND_UP(tclk_hz, 30);
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
spi->base = devm_ioremap_resource(&pdev->dev, r);

75
drivers/spi/spi-pl022.c
View file

@ -2108,8 +2108,6 @@ static int pl022_probe(struct amba_device *adev, const struct amba_id *id)
pl022->chipselects = devm_kzalloc(dev, num_cs * sizeof(int),
GFP_KERNEL);
pinctrl_pm_select_default_state(dev);
/*
* Bus Number Which has been Assigned to this SSP controller
* on this board
@ -2182,13 +2180,7 @@ static int pl022_probe(struct amba_device *adev, const struct amba_id *id)
goto err_no_clk;
}
status = clk_prepare(pl022->clk);
if (status) {
dev_err(&adev->dev, "could not prepare SSP/SPI bus clock\n");
goto err_clk_prep;
}
status = clk_enable(pl022->clk);
status = clk_prepare_enable(pl022->clk);
if (status) {
dev_err(&adev->dev, "could not enable SSP/SPI bus clock\n");
goto err_no_clk_en;
@ -2249,10 +2241,8 @@ static int pl022_probe(struct amba_device *adev, const struct amba_id *id)
if (platform_info->enable_dma)
pl022_dma_remove(pl022);
err_no_irq:
clk_disable(pl022->clk);
clk_disable_unprepare(pl022->clk);
err_no_clk_en:
clk_unprepare(pl022->clk);
err_clk_prep:
err_no_clk:
err_no_ioremap:
amba_release_regions(adev);
@ -2280,42 +2270,13 @@ pl022_remove(struct amba_device *adev)
if (pl022->master_info->enable_dma)
pl022_dma_remove(pl022);
clk_disable(pl022->clk);
clk_unprepare(pl022->clk);
clk_disable_unprepare(pl022->clk);
amba_release_regions(adev);
tasklet_disable(&pl022->pump_transfers);
return 0;
}
#if defined(CONFIG_SUSPEND) || defined(CONFIG_PM_RUNTIME)
/*
* These two functions are used from both suspend/resume and
* the runtime counterparts to handle external resources like
* clocks, pins and regulators when going to sleep.
*/
static void pl022_suspend_resources(struct pl022 *pl022, bool runtime)
{
clk_disable(pl022->clk);
if (runtime)
pinctrl_pm_select_idle_state(&pl022->adev->dev);
else
pinctrl_pm_select_sleep_state(&pl022->adev->dev);
}
static void pl022_resume_resources(struct pl022 *pl022, bool runtime)
{
/* First go to the default state */
pinctrl_pm_select_default_state(&pl022->adev->dev);
if (!runtime)
/* Then let's idle the pins until the next transfer happens */
pinctrl_pm_select_idle_state(&pl022->adev->dev);
clk_enable(pl022->clk);
}
#endif
#ifdef CONFIG_SUSPEND
#ifdef CONFIG_PM_SLEEP
static int pl022_suspend(struct device *dev)
{
struct pl022 *pl022 = dev_get_drvdata(dev);
@ -2327,8 +2288,13 @@ static int pl022_suspend(struct device *dev)
return ret;
}
pm_runtime_get_sync(dev);
pl022_suspend_resources(pl022, false);
ret = pm_runtime_force_suspend(dev);
if (ret) {
spi_master_resume(pl022->master);
return ret;
}
pinctrl_pm_select_sleep_state(dev);
dev_dbg(dev, "suspended\n");
return 0;
@ -2339,8 +2305,9 @@ static int pl022_resume(struct device *dev)
struct pl022 *pl022 = dev_get_drvdata(dev);
int ret;
pl022_resume_resources(pl022, false);
pm_runtime_put(dev);
ret = pm_runtime_force_resume(dev);
if (ret)
dev_err(dev, "problem resuming\n");
/* Start the queue running */
ret = spi_master_resume(pl022->master);
@ -2351,14 +2318,16 @@ static int pl022_resume(struct device *dev)
return ret;
}
#endif /* CONFIG_PM */
#endif
#ifdef CONFIG_PM_RUNTIME
#ifdef CONFIG_PM
static int pl022_runtime_suspend(struct device *dev)
{
struct pl022 *pl022 = dev_get_drvdata(dev);
pl022_suspend_resources(pl022, true);
clk_disable_unprepare(pl022->clk);
pinctrl_pm_select_idle_state(dev);
return 0;
}
@ -2366,14 +2335,16 @@ static int pl022_runtime_resume(struct device *dev)
{
struct pl022 *pl022 = dev_get_drvdata(dev);
pl022_resume_resources(pl022, true);
pinctrl_pm_select_default_state(dev);
clk_prepare_enable(pl022->clk);
return 0;
}
#endif
static const struct dev_pm_ops pl022_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(pl022_suspend, pl022_resume)
SET_RUNTIME_PM_OPS(pl022_runtime_suspend, pl022_runtime_resume, NULL)
SET_PM_RUNTIME_PM_OPS(pl022_runtime_suspend, pl022_runtime_resume, NULL)
};
static struct vendor_data vendor_arm = {

779
drivers/spi/spi-qup.c Normal file
View file

@ -0,0 +1,779 @@
/*
* Copyright (c) 2008-2014, The Linux foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License rev 2 and
* only rev 2 as published by the free Software foundation.
*
* 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.
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/spi/spi.h>
#define QUP_CONFIG 0x0000
#define QUP_STATE 0x0004
#define QUP_IO_M_MODES 0x0008
#define QUP_SW_RESET 0x000c
#define QUP_OPERATIONAL 0x0018
#define QUP_ERROR_FLAGS 0x001c
#define QUP_ERROR_FLAGS_EN 0x0020
#define QUP_OPERATIONAL_MASK 0x0028
#define QUP_HW_VERSION 0x0030
#define QUP_MX_OUTPUT_CNT 0x0100
#define QUP_OUTPUT_FIFO 0x0110
#define QUP_MX_WRITE_CNT 0x0150
#define QUP_MX_INPUT_CNT 0x0200
#define QUP_MX_READ_CNT 0x0208
#define QUP_INPUT_FIFO 0x0218
#define SPI_CONFIG 0x0300
#define SPI_IO_CONTROL 0x0304
#define SPI_ERROR_FLAGS 0x0308
#define SPI_ERROR_FLAGS_EN 0x030c
/* QUP_CONFIG fields */
#define QUP_CONFIG_SPI_MODE (1 << 8)
#define QUP_CONFIG_CLOCK_AUTO_GATE BIT(13)
#define QUP_CONFIG_NO_INPUT BIT(7)
#define QUP_CONFIG_NO_OUTPUT BIT(6)
#define QUP_CONFIG_N 0x001f
/* QUP_STATE fields */
#define QUP_STATE_VALID BIT(2)
#define QUP_STATE_RESET 0
#define QUP_STATE_RUN 1
#define QUP_STATE_PAUSE 3
#define QUP_STATE_MASK 3
#define QUP_STATE_CLEAR 2
#define QUP_HW_VERSION_2_1_1 0x20010001
/* QUP_IO_M_MODES fields */
#define QUP_IO_M_PACK_EN BIT(15)
#define QUP_IO_M_UNPACK_EN BIT(14)
#define QUP_IO_M_INPUT_MODE_MASK_SHIFT 12
#define QUP_IO_M_OUTPUT_MODE_MASK_SHIFT 10
#define QUP_IO_M_INPUT_MODE_MASK (3 << QUP_IO_M_INPUT_MODE_MASK_SHIFT)
#define QUP_IO_M_OUTPUT_MODE_MASK (3 << QUP_IO_M_OUTPUT_MODE_MASK_SHIFT)
#define QUP_IO_M_OUTPUT_BLOCK_SIZE(x) (((x) & (0x03 << 0)) >> 0)
#define QUP_IO_M_OUTPUT_FIFO_SIZE(x) (((x) & (0x07 << 2)) >> 2)
#define QUP_IO_M_INPUT_BLOCK_SIZE(x) (((x) & (0x03 << 5)) >> 5)
#define QUP_IO_M_INPUT_FIFO_SIZE(x) (((x) & (0x07 << 7)) >> 7)
#define QUP_IO_M_MODE_FIFO 0
#define QUP_IO_M_MODE_BLOCK 1
#define QUP_IO_M_MODE_DMOV 2
#define QUP_IO_M_MODE_BAM 3
/* QUP_OPERATIONAL fields */
#define QUP_OP_MAX_INPUT_DONE_FLAG BIT(11)
#define QUP_OP_MAX_OUTPUT_DONE_FLAG BIT(10)
#define QUP_OP_IN_SERVICE_FLAG BIT(9)
#define QUP_OP_OUT_SERVICE_FLAG BIT(8)
#define QUP_OP_IN_FIFO_FULL BIT(7)
#define QUP_OP_OUT_FIFO_FULL BIT(6)
#define QUP_OP_IN_FIFO_NOT_EMPTY BIT(5)
#define QUP_OP_OUT_FIFO_NOT_EMPTY BIT(4)
/* QUP_ERROR_FLAGS and QUP_ERROR_FLAGS_EN fields */
#define QUP_ERROR_OUTPUT_OVER_RUN BIT(5)
#define QUP_ERROR_INPUT_UNDER_RUN BIT(4)
#define QUP_ERROR_OUTPUT_UNDER_RUN BIT(3)
#define QUP_ERROR_INPUT_OVER_RUN BIT(2)
/* SPI_CONFIG fields */
#define SPI_CONFIG_HS_MODE BIT(10)
#define SPI_CONFIG_INPUT_FIRST BIT(9)
#define SPI_CONFIG_LOOPBACK BIT(8)
/* SPI_IO_CONTROL fields */
#define SPI_IO_C_FORCE_CS BIT(11)
#define SPI_IO_C_CLK_IDLE_HIGH BIT(10)
#define SPI_IO_C_MX_CS_MODE BIT(8)
#define SPI_IO_C_CS_N_POLARITY_0 BIT(4)
#define SPI_IO_C_CS_SELECT(x) (((x) & 3) << 2)
#define SPI_IO_C_CS_SELECT_MASK 0x000c
#define SPI_IO_C_TRISTATE_CS BIT(1)
#define SPI_IO_C_NO_TRI_STATE BIT(0)
/* SPI_ERROR_FLAGS and SPI_ERROR_FLAGS_EN fields */
#define SPI_ERROR_CLK_OVER_RUN BIT(1)
#define SPI_ERROR_CLK_UNDER_RUN BIT(0)
#define SPI_NUM_CHIPSELECTS 4
/* high speed mode is when bus rate is greater then 26MHz */
#define SPI_HS_MIN_RATE 26000000
#define SPI_MAX_RATE 50000000
#define SPI_DELAY_THRESHOLD 1
#define SPI_DELAY_RETRY 10
struct spi_qup {
void __iomem *base;
struct device *dev;
struct clk *cclk; /* core clock */
struct clk *iclk; /* interface clock */
int irq;
spinlock_t lock;
int in_fifo_sz;
int out_fifo_sz;
int in_blk_sz;
int out_blk_sz;
struct spi_transfer *xfer;
struct completion done;
int error;
int w_size; /* bytes per SPI word */
int tx_bytes;
int rx_bytes;
};
static inline bool spi_qup_is_valid_state(struct spi_qup *controller)
{
u32 opstate = readl_relaxed(controller->base + QUP_STATE);
return opstate & QUP_STATE_VALID;
}
static int spi_qup_set_state(struct spi_qup *controller, u32 state)
{
unsigned long loop;
u32 cur_state;
loop = 0;
while (!spi_qup_is_valid_state(controller)) {
usleep_range(SPI_DELAY_THRESHOLD, SPI_DELAY_THRESHOLD * 2);
if (++loop > SPI_DELAY_RETRY)
return -EIO;
}
if (loop)
dev_dbg(controller->dev, "invalid state for %ld,us %d\n",
loop, state);
cur_state = readl_relaxed(controller->base + QUP_STATE);
/*
* Per spec: for PAUSE_STATE to RESET_STATE, two writes
* of (b10) are required
*/
if (((cur_state & QUP_STATE_MASK) == QUP_STATE_PAUSE) &&
(state == QUP_STATE_RESET)) {
writel_relaxed(QUP_STATE_CLEAR, controller->base + QUP_STATE);
writel_relaxed(QUP_STATE_CLEAR, controller->base + QUP_STATE);
} else {
cur_state &= ~QUP_STATE_MASK;
cur_state |= state;
writel_relaxed(cur_state, controller->base + QUP_STATE);
}
loop = 0;
while (!spi_qup_is_valid_state(controller)) {
usleep_range(SPI_DELAY_THRESHOLD, SPI_DELAY_THRESHOLD * 2);
if (++loop > SPI_DELAY_RETRY)
return -EIO;
}
return 0;
}
static void spi_qup_fifo_read(struct spi_qup *controller,
struct spi_transfer *xfer)
{
u8 *rx_buf = xfer->rx_buf;
u32 word, state;
int idx, shift, w_size;
w_size = controller->w_size;
while (controller->rx_bytes < xfer->len) {
state = readl_relaxed(controller->base + QUP_OPERATIONAL);
if (0 == (state & QUP_OP_IN_FIFO_NOT_EMPTY))
break;
word = readl_relaxed(controller->base + QUP_INPUT_FIFO);
if (!rx_buf) {
controller->rx_bytes += w_size;
continue;
}
for (idx = 0; idx < w_size; idx++, controller->rx_bytes++) {
/*
* The data format depends on bytes per SPI word:
* 4 bytes: 0x12345678
* 2 bytes: 0x00001234
* 1 byte : 0x00000012
*/
shift = BITS_PER_BYTE;
shift *= (w_size - idx - 1);
rx_buf[controller->rx_bytes] = word >> shift;
}
}
}
static void spi_qup_fifo_write(struct spi_qup *controller,
struct spi_transfer *xfer)
{
const u8 *tx_buf = xfer->tx_buf;
u32 word, state, data;
int idx, w_size;
w_size = controller->w_size;
while (controller->tx_bytes < xfer->len) {
state = readl_relaxed(controller->base + QUP_OPERATIONAL);
if (state & QUP_OP_OUT_FIFO_FULL)
break;
word = 0;
for (idx = 0; idx < w_size; idx++, controller->tx_bytes++) {
if (!tx_buf) {
controller->tx_bytes += w_size;
break;
}
data = tx_buf[controller->tx_bytes];
word |= data << (BITS_PER_BYTE * (3 - idx));
}
writel_relaxed(word, controller->base + QUP_OUTPUT_FIFO);
}
}
static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
{
struct spi_qup *controller = dev_id;
struct spi_transfer *xfer;
u32 opflags, qup_err, spi_err;
unsigned long flags;
int error = 0;
spin_lock_irqsave(&controller->lock, flags);
xfer = controller->xfer;
controller->xfer = NULL;
spin_unlock_irqrestore(&controller->lock, flags);
qup_err = readl_relaxed(controller->base + QUP_ERROR_FLAGS);
spi_err = readl_relaxed(controller->base + SPI_ERROR_FLAGS);
opflags = readl_relaxed(controller->base + QUP_OPERATIONAL);
writel_relaxed(qup_err, controller->base + QUP_ERROR_FLAGS);
writel_relaxed(spi_err, controller->base + SPI_ERROR_FLAGS);
writel_relaxed(opflags, controller->base + QUP_OPERATIONAL);
if (!xfer) {
dev_err_ratelimited(controller->dev, "unexpected irq %x08 %x08 %x08\n",
qup_err, spi_err, opflags);
return IRQ_HANDLED;
}
if (qup_err) {
if (qup_err & QUP_ERROR_OUTPUT_OVER_RUN)
dev_warn(controller->dev, "OUTPUT_OVER_RUN\n");
if (qup_err & QUP_ERROR_INPUT_UNDER_RUN)
dev_warn(controller->dev, "INPUT_UNDER_RUN\n");
if (qup_err & QUP_ERROR_OUTPUT_UNDER_RUN)
dev_warn(controller->dev, "OUTPUT_UNDER_RUN\n");
if (qup_err & QUP_ERROR_INPUT_OVER_RUN)
dev_warn(controller->dev, "INPUT_OVER_RUN\n");
error = -EIO;
}
if (spi_err) {
if (spi_err & SPI_ERROR_CLK_OVER_RUN)
dev_warn(controller->dev, "CLK_OVER_RUN\n");
if (spi_err & SPI_ERROR_CLK_UNDER_RUN)
dev_warn(controller->dev, "CLK_UNDER_RUN\n");
error = -EIO;
}
if (opflags & QUP_OP_IN_SERVICE_FLAG)
spi_qup_fifo_read(controller, xfer);
if (opflags & QUP_OP_OUT_SERVICE_FLAG)
spi_qup_fifo_write(controller, xfer);
spin_lock_irqsave(&controller->lock, flags);
controller->error = error;
controller->xfer = xfer;
spin_unlock_irqrestore(&controller->lock, flags);
if (controller->rx_bytes == xfer->len || error)
complete(&controller->done);
return IRQ_HANDLED;
}
/* set clock freq ... bits per word */
static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
{
struct spi_qup *controller = spi_master_get_devdata(spi->master);
u32 config, iomode, mode;
int ret, n_words, w_size;
if (spi->mode & SPI_LOOP && xfer->len > controller->in_fifo_sz) {
dev_err(controller->dev, "too big size for loopback %d > %d\n",
xfer->len, controller->in_fifo_sz);
return -EIO;
}
ret = clk_set_rate(controller->cclk, xfer->speed_hz);
if (ret) {
dev_err(controller->dev, "fail to set frequency %d",
xfer->speed_hz);
return -EIO;
}
if (spi_qup_set_state(controller, QUP_STATE_RESET)) {
dev_err(controller->dev, "cannot set RESET state\n");
return -EIO;
}
w_size = 4;
if (xfer->bits_per_word <= 8)
w_size = 1;
else if (xfer->bits_per_word <= 16)
w_size = 2;
n_words = xfer->len / w_size;
controller->w_size = w_size;
if (n_words <= controller->in_fifo_sz) {
mode = QUP_IO_M_MODE_FIFO;
writel_relaxed(n_words, controller->base + QUP_MX_READ_CNT);
writel_relaxed(n_words, controller->base + QUP_MX_WRITE_CNT);
/* must be zero for FIFO */
writel_relaxed(0, controller->base + QUP_MX_INPUT_CNT);
writel_relaxed(0, controller->base + QUP_MX_OUTPUT_CNT);
} else {
mode = QUP_IO_M_MODE_BLOCK;
writel_relaxed(n_words, controller->base + QUP_MX_INPUT_CNT);
writel_relaxed(n_words, controller->base + QUP_MX_OUTPUT_CNT);
/* must be zero for BLOCK and BAM */
writel_relaxed(0, controller->base + QUP_MX_READ_CNT);
writel_relaxed(0, controller->base + QUP_MX_WRITE_CNT);
}
iomode = readl_relaxed(controller->base + QUP_IO_M_MODES);
/* Set input and output transfer mode */
iomode &= ~(QUP_IO_M_INPUT_MODE_MASK | QUP_IO_M_OUTPUT_MODE_MASK);
iomode &= ~(QUP_IO_M_PACK_EN | QUP_IO_M_UNPACK_EN);
iomode |= (mode << QUP_IO_M_OUTPUT_MODE_MASK_SHIFT);
iomode |= (mode << QUP_IO_M_INPUT_MODE_MASK_SHIFT);
writel_relaxed(iomode, controller->base + QUP_IO_M_MODES);
config = readl_relaxed(controller->base + SPI_CONFIG);
if (spi->mode & SPI_LOOP)
config |= SPI_CONFIG_LOOPBACK;
else
config &= ~SPI_CONFIG_LOOPBACK;
if (spi->mode & SPI_CPHA)
config &= ~SPI_CONFIG_INPUT_FIRST;
else
config |= SPI_CONFIG_INPUT_FIRST;
/*
* HS_MODE improves signal stability for spi-clk high rates,
* but is invalid in loop back mode.
*/
if ((xfer->speed_hz >= SPI_HS_MIN_RATE) && !(spi->mode & SPI_LOOP))
config |= SPI_CONFIG_HS_MODE;
else
config &= ~SPI_CONFIG_HS_MODE;
writel_relaxed(config, controller->base + SPI_CONFIG);
config = readl_relaxed(controller->base + QUP_CONFIG);
config &= ~(QUP_CONFIG_NO_INPUT | QUP_CONFIG_NO_OUTPUT | QUP_CONFIG_N);
config |= xfer->bits_per_word - 1;
config |= QUP_CONFIG_SPI_MODE;
writel_relaxed(config, controller->base + QUP_CONFIG);
writel_relaxed(0, controller->base + QUP_OPERATIONAL_MASK);
return 0;
}
static void spi_qup_set_cs(struct spi_device *spi, bool enable)
{
struct spi_qup *controller = spi_master_get_devdata(spi->master);
u32 iocontol, mask;
iocontol = readl_relaxed(controller->base + SPI_IO_CONTROL);
/* Disable auto CS toggle and use manual */
iocontol &= ~SPI_IO_C_MX_CS_MODE;
iocontol |= SPI_IO_C_FORCE_CS;
iocontol &= ~SPI_IO_C_CS_SELECT_MASK;
iocontol |= SPI_IO_C_CS_SELECT(spi->chip_select);
mask = SPI_IO_C_CS_N_POLARITY_0 << spi->chip_select;
if (enable)
iocontol |= mask;
else
iocontol &= ~mask;
writel_relaxed(iocontol, controller->base + SPI_IO_CONTROL);
}
static int spi_qup_transfer_one(struct spi_master *master,
struct spi_device *spi,
struct spi_transfer *xfer)
{
struct spi_qup *controller = spi_master_get_devdata(master);
unsigned long timeout, flags;
int ret = -EIO;
ret = spi_qup_io_config(spi, xfer);
if (ret)
return ret;
timeout = DIV_ROUND_UP(xfer->speed_hz, MSEC_PER_SEC);
timeout = DIV_ROUND_UP(xfer->len * 8, timeout);
timeout = 100 * msecs_to_jiffies(timeout);
reinit_completion(&controller->done);
spin_lock_irqsave(&controller->lock, flags);
controller->xfer = xfer;
controller->error = 0;
controller->rx_bytes = 0;
controller->tx_bytes = 0;
spin_unlock_irqrestore(&controller->lock, flags);
if (spi_qup_set_state(controller, QUP_STATE_RUN)) {
dev_warn(controller->dev, "cannot set RUN state\n");
goto exit;
}
if (spi_qup_set_state(controller, QUP_STATE_PAUSE)) {
dev_warn(controller->dev, "cannot set PAUSE state\n");
goto exit;
}
spi_qup_fifo_write(controller, xfer);
if (spi_qup_set_state(controller, QUP_STATE_RUN)) {
dev_warn(controller->dev, "cannot set EXECUTE state\n");
goto exit;
}
if (!wait_for_completion_timeout(&controller->done, timeout))
ret = -ETIMEDOUT;
exit:
spi_qup_set_state(controller, QUP_STATE_RESET);
spin_lock_irqsave(&controller->lock, flags);
controller->xfer = NULL;
if (!ret)
ret = controller->error;
spin_unlock_irqrestore(&controller->lock, flags);
return ret;
}
static int spi_qup_probe(struct platform_device *pdev)
{
struct spi_master *master;
struct clk *iclk, *cclk;
struct spi_qup *controller;
struct resource *res;
struct device *dev;
void __iomem *base;
u32 data, max_freq, iomode;
int ret, irq, size;
dev = &pdev->dev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
cclk = devm_clk_get(dev, "core");
if (IS_ERR(cclk))
return PTR_ERR(cclk);
iclk = devm_clk_get(dev, "iface");
if (IS_ERR(iclk))
return PTR_ERR(iclk);
/* This is optional parameter */
if (of_property_read_u32(dev->of_node, "spi-max-frequency", &max_freq))
max_freq = SPI_MAX_RATE;
if (!max_freq || max_freq > SPI_MAX_RATE) {
dev_err(dev, "invalid clock frequency %d\n", max_freq);
return -ENXIO;
}
ret = clk_prepare_enable(cclk);
if (ret) {
dev_err(dev, "cannot enable core clock\n");
return ret;
}
ret = clk_prepare_enable(iclk);
if (ret) {
clk_disable_unprepare(cclk);
dev_err(dev, "cannot enable iface clock\n");
return ret;
}
data = readl_relaxed(base + QUP_HW_VERSION);
if (data < QUP_HW_VERSION_2_1_1) {
clk_disable_unprepare(cclk);
clk_disable_unprepare(iclk);
dev_err(dev, "v.%08x is not supported\n", data);
return -ENXIO;
}
master = spi_alloc_master(dev, sizeof(struct spi_qup));
if (!master) {
clk_disable_unprepare(cclk);
clk_disable_unprepare(iclk);
dev_err(dev, "cannot allocate master\n");
return -ENOMEM;
}
master->bus_num = pdev->id;
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LOOP;
master->num_chipselect = SPI_NUM_CHIPSELECTS;
master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32);
master->max_speed_hz = max_freq;
master->set_cs = spi_qup_set_cs;
master->transfer_one = spi_qup_transfer_one;
master->dev.of_node = pdev->dev.of_node;
master->auto_runtime_pm = true;
platform_set_drvdata(pdev, master);
controller = spi_master_get_devdata(master);
controller->dev = dev;
controller->base = base;
controller->iclk = iclk;
controller->cclk = cclk;
controller->irq = irq;
spin_lock_init(&controller->lock);
init_completion(&controller->done);
iomode = readl_relaxed(base + QUP_IO_M_MODES);
size = QUP_IO_M_OUTPUT_BLOCK_SIZE(iomode);
if (size)
controller->out_blk_sz = size * 16;
else
controller->out_blk_sz = 4;
size = QUP_IO_M_INPUT_BLOCK_SIZE(iomode);
if (size)
controller->in_blk_sz = size * 16;
else
controller->in_blk_sz = 4;
size = QUP_IO_M_OUTPUT_FIFO_SIZE(iomode);
controller->out_fifo_sz = controller->out_blk_sz * (2 << size);
size = QUP_IO_M_INPUT_FIFO_SIZE(iomode);
controller->in_fifo_sz = controller->in_blk_sz * (2 << size);
dev_info(dev, "v.%08x IN:block:%d, fifo:%d, OUT:block:%d, fifo:%d\n",
data, controller->in_blk_sz, controller->in_fifo_sz,
controller->out_blk_sz, controller->out_fifo_sz);
writel_relaxed(1, base + QUP_SW_RESET);
ret = spi_qup_set_state(controller, QUP_STATE_RESET);
if (ret) {
dev_err(dev, "cannot set RESET state\n");
goto error;
}
writel_relaxed(0, base + QUP_OPERATIONAL);
writel_relaxed(0, base + QUP_IO_M_MODES);
writel_relaxed(0, base + QUP_OPERATIONAL_MASK);
writel_relaxed(SPI_ERROR_CLK_UNDER_RUN | SPI_ERROR_CLK_OVER_RUN,
base + SPI_ERROR_FLAGS_EN);
writel_relaxed(0, base + SPI_CONFIG);
writel_relaxed(SPI_IO_C_NO_TRI_STATE, base + SPI_IO_CONTROL);
ret = devm_request_irq(dev, irq, spi_qup_qup_irq,
IRQF_TRIGGER_HIGH, pdev->name, controller);
if (ret)
goto error;
ret = devm_spi_register_master(dev, master);
if (ret)
goto error;
pm_runtime_set_autosuspend_delay(dev, MSEC_PER_SEC);
pm_runtime_use_autosuspend(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
return 0;
error:
clk_disable_unprepare(cclk);
clk_disable_unprepare(iclk);
spi_master_put(master);
return ret;
}
#ifdef CONFIG_PM_RUNTIME
static int spi_qup_pm_suspend_runtime(struct device *device)
{
struct spi_master *master = dev_get_drvdata(device);
struct spi_qup *controller = spi_master_get_devdata(master);
u32 config;
/* Enable clocks auto gaiting */
config = readl(controller->base + QUP_CONFIG);
config |= QUP_CONFIG_CLOCK_AUTO_GATE;
writel_relaxed(config, controller->base + QUP_CONFIG);
return 0;
}
static int spi_qup_pm_resume_runtime(struct device *device)
{
struct spi_master *master = dev_get_drvdata(device);
struct spi_qup *controller = spi_master_get_devdata(master);
u32 config;
/* Disable clocks auto gaiting */
config = readl_relaxed(controller->base + QUP_CONFIG);
config &= ~QUP_CONFIG_CLOCK_AUTO_GATE;
writel_relaxed(config, controller->base + QUP_CONFIG);
return 0;
}
#endif /* CONFIG_PM_RUNTIME */
#ifdef CONFIG_PM_SLEEP
static int spi_qup_suspend(struct device *device)
{
struct spi_master *master = dev_get_drvdata(device);
struct spi_qup *controller = spi_master_get_devdata(master);
int ret;
ret = spi_master_suspend(master);
if (ret)
return ret;
ret = spi_qup_set_state(controller, QUP_STATE_RESET);
if (ret)
return ret;
clk_disable_unprepare(controller->cclk);
clk_disable_unprepare(controller->iclk);
return 0;
}
static int spi_qup_resume(struct device *device)
{
struct spi_master *master = dev_get_drvdata(device);
struct spi_qup *controller = spi_master_get_devdata(master);
int ret;
ret = clk_prepare_enable(controller->iclk);
if (ret)
return ret;
ret = clk_prepare_enable(controller->cclk);
if (ret)
return ret;
ret = spi_qup_set_state(controller, QUP_STATE_RESET);
if (ret)
return ret;
return spi_master_resume(master);
}
#endif /* CONFIG_PM_SLEEP */
static int spi_qup_remove(struct platform_device *pdev)
{
struct spi_master *master = dev_get_drvdata(&pdev->dev);
struct spi_qup *controller = spi_master_get_devdata(master);
int ret;
ret = pm_runtime_get_sync(&pdev->dev);
if (ret)
return ret;
ret = spi_qup_set_state(controller, QUP_STATE_RESET);
if (ret)
return ret;
clk_disable_unprepare(controller->cclk);
clk_disable_unprepare(controller->iclk);
pm_runtime_put_noidle(&pdev->dev);
pm_runtime_disable(&pdev->dev);
return 0;
}
static struct of_device_id spi_qup_dt_match[] = {
{ .compatible = "qcom,spi-qup-v2.1.1", },
{ .compatible = "qcom,spi-qup-v2.2.1", },
{ }
};
MODULE_DEVICE_TABLE(of, spi_qup_dt_match);
static const struct dev_pm_ops spi_qup_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(spi_qup_suspend, spi_qup_resume)
SET_RUNTIME_PM_OPS(spi_qup_pm_suspend_runtime,
spi_qup_pm_resume_runtime,
NULL)
};
static struct platform_driver spi_qup_driver = {
.driver = {
.name = "spi_qup",
.owner = THIS_MODULE,
.pm = &spi_qup_dev_pm_ops,
.of_match_table = spi_qup_dt_match,
},
.probe = spi_qup_probe,
.remove = spi_qup_remove,
};
module_platform_driver(spi_qup_driver);
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:spi_qup");

852
drivers/spi/spi-rspi.c
View file

File diff suppressed because it is too large Load diff

18
drivers/spi/spi-s3c24xx.c
View file

@ -122,25 +122,15 @@ static int s3c24xx_spi_update_state(struct spi_device *spi,
{
struct s3c24xx_spi *hw = to_hw(spi);
struct s3c24xx_spi_devstate *cs = spi->controller_state;
unsigned int bpw;
unsigned int hz;
unsigned int div;
unsigned long clk;
bpw = t ? t->bits_per_word : spi->bits_per_word;
hz = t ? t->speed_hz : spi->max_speed_hz;
if (!bpw)
bpw = 8;
if (!hz)
hz = spi->max_speed_hz;
if (bpw != 8) {
dev_err(&spi->dev, "invalid bits-per-word (%d)\n", bpw);
return -EINVAL;
}
if (spi->mode != cs->mode) {
u8 spcon = SPCON_DEFAULT | S3C2410_SPCON_ENSCK;
@ -543,6 +533,7 @@ static int s3c24xx_spi_probe(struct platform_device *pdev)
master->num_chipselect = hw->pdata->num_cs;
master->bus_num = pdata->bus_num;
master->bits_per_word_mask = SPI_BPW_MASK(8);
/* setup the state for the bitbang driver */
@ -642,6 +633,11 @@ static int s3c24xx_spi_remove(struct platform_device *dev)
static int s3c24xx_spi_suspend(struct device *dev)
{
struct s3c24xx_spi *hw = dev_get_drvdata(dev);
int ret;
ret = spi_master_suspend(hw->master);
if (ret)
return ret;
if (hw->pdata && hw->pdata->gpio_setup)
hw->pdata->gpio_setup(hw->pdata, 0);
@ -655,7 +651,7 @@ static int s3c24xx_spi_resume(struct device *dev)
struct s3c24xx_spi *hw = dev_get_drvdata(dev);
s3c24xx_spi_initialsetup(hw);
return 0;
return spi_master_resume(hw->master);
}
static const struct dev_pm_ops s3c24xx_spi_pmops = {

4
include/linux/pm_runtime.h
View file

@ -26,9 +26,13 @@
#ifdef CONFIG_PM
extern int pm_generic_runtime_suspend(struct device *dev);
extern int pm_generic_runtime_resume(struct device *dev);
extern int pm_runtime_force_suspend(struct device *dev);
extern int pm_runtime_force_resume(struct device *dev);
#else
static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
static inline int pm_runtime_force_suspend(struct device *dev) { return 0; }
static inline int pm_runtime_force_resume(struct device *dev) { return 0; }
#endif
#ifdef CONFIG_PM_RUNTIME