Merge branch 'spi' of git://git.linutronix.de/users/bigeasy/soda into spi/next

* 'spi' of git://git.linutronix.de/users/bigeasy/soda into spi/next
  spi/pxa2xx: register driver properly
  spi/pxa2xx: add support for shared IRQ handler
  spi/pxa2xx: Use define for SSSR_TFL_MASK instead of plain numbers
  arm/pxa2xx: reorgazine SSP and SPI header files
  spi/pxa2xx: Add CE4100 support
  spi/pxa2xx: Consider CE4100's FIFO depth
  spi/pxa2xx: Add chipselect support for Sodaville
  spi/pxa2xx: Modify RX-Tresh instead of busy-loop for the remaining RX bytes.
  spi/pxa2xx: pass of_node to spi device and set a parent device

27 files changed, 547 insertions, 138 deletions

diff --git a/Documentation/spi/pxa2xx b/Documentation/spi/pxa2xx
index 6bb916d57c9..68a4fe3818a 100644
--- a/Documentation/spi/pxa2xx
+++ b/Documentation/spi/pxa2xx
@@ -19,7 +19,7 @@ Declaring PXA2xx Master Controllers
 -----------------------------------
 Typically a SPI master is defined in the arch/.../mach-*/board-*.c as a
 "platform device".  The master configuration is passed to the driver via a table
-found in arch/arm/mach-pxa/include/mach/pxa2xx_spi.h:
+found in include/linux/spi/pxa2xx_spi.h:
 
 struct pxa2xx_spi_master {
 	enum pxa_ssp_type ssp_type;
@@ -94,7 +94,7 @@ using the "spi_board_info" structure found in "linux/spi/spi.h". See
 
 Each slave device attached to the PXA must provide slave specific configuration
 information via the structure "pxa2xx_spi_chip" found in
-"arch/arm/mach-pxa/include/mach/pxa2xx_spi.h".  The pxa2xx_spi master controller driver
+"include/linux/spi/pxa2xx_spi.h".  The pxa2xx_spi master controller driver
 will uses the configuration whenever the driver communicates with the slave
 device. All fields are optional.
 
diff --git a/arch/arm/mach-pxa/cm-x255.c b/arch/arm/mach-pxa/cm-x255.c
index f1a7703d771..93f59f877fc 100644
--- a/arch/arm/mach-pxa/cm-x255.c
+++ b/arch/arm/mach-pxa/cm-x255.c
@@ -17,13 +17,13 @@
 #include <linux/mtd/nand-gpio.h>
 
 #include <linux/spi/spi.h>
+#include <linux/spi/pxa2xx_spi.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach-types.h>
 #include <asm/mach/map.h>
 
 #include <mach/pxa25x.h>
-#include <mach/pxa2xx_spi.h>
 
 #include "generic.h"
 
diff --git a/arch/arm/mach-pxa/cm-x270.c b/arch/arm/mach-pxa/cm-x270.c
index a9926bb7592..b88d601a809 100644
--- a/arch/arm/mach-pxa/cm-x270.c
+++ b/arch/arm/mach-pxa/cm-x270.c
@@ -19,12 +19,12 @@
 #include <video/mbxfb.h>
 
 #include <linux/spi/spi.h>
+#include <linux/spi/pxa2xx_spi.h>
 #include <linux/spi/libertas_spi.h>
 
 #include <mach/pxa27x.h>
 #include <mach/ohci.h>
 #include <mach/mmc.h>
-#include <mach/pxa2xx_spi.h>
 
 #include "generic.h"
 
diff --git a/arch/arm/mach-pxa/corgi.c b/arch/arm/mach-pxa/corgi.c
index 821229acabe..3b8dcac2b8f 100644
--- a/arch/arm/mach-pxa/corgi.c
+++ b/arch/arm/mach-pxa/corgi.c
@@ -28,6 +28,7 @@
 #include <linux/spi/spi.h>
 #include <linux/spi/ads7846.h>
 #include <linux/spi/corgi_lcd.h>
+#include <linux/spi/pxa2xx_spi.h>
 #include <linux/mtd/sharpsl.h>
 #include <linux/input/matrix_keypad.h>
 #include <video/w100fb.h>
@@ -48,7 +49,6 @@
 #include <mach/irda.h>
 #include <mach/mmc.h>
 #include <mach/udc.h>
-#include <mach/pxa2xx_spi.h>
 #include <mach/corgi.h>
 #include <mach/sharpsl_pm.h>
 
diff --git a/arch/arm/mach-pxa/devices.c b/arch/arm/mach-pxa/devices.c
index aaa1166df96..c4f9c715be7 100644
--- a/arch/arm/mach-pxa/devices.c
+++ b/arch/arm/mach-pxa/devices.c
@@ -3,6 +3,7 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
+#include <linux/spi/pxa2xx_spi.h>
 
 #include <asm/pmu.h>
 #include <mach/udc.h>
@@ -12,7 +13,6 @@
 #include <mach/irda.h>
 #include <mach/ohci.h>
 #include <plat/pxa27x_keypad.h>
-#include <mach/pxa2xx_spi.h>
 #include <mach/camera.h>
 #include <mach/audio.h>
 #include <mach/hardware.h>
diff --git a/arch/arm/mach-pxa/em-x270.c b/arch/arm/mach-pxa/em-x270.c
index ed0dbfdb22e..b20b944c337 100644
--- a/arch/arm/mach-pxa/em-x270.c
+++ b/arch/arm/mach-pxa/em-x270.c
@@ -26,6 +26,7 @@
 #include <linux/spi/spi.h>
 #include <linux/spi/tdo24m.h>
 #include <linux/spi/libertas_spi.h>
+#include <linux/spi/pxa2xx_spi.h>
 #include <linux/power_supply.h>
 #include <linux/apm-emulation.h>
 #include <linux/i2c.h>
@@ -46,7 +47,6 @@
 #include <plat/pxa27x_keypad.h>
 #include <plat/i2c.h>
 #include <mach/camera.h>
-#include <mach/pxa2xx_spi.h>
 
 #include "generic.h"
 #include "devices.h"
diff --git a/arch/arm/mach-pxa/hx4700.c b/arch/arm/mach-pxa/hx4700.c
index 76d93a25bab..f09526f5215 100644
--- a/arch/arm/mach-pxa/hx4700.c
+++ b/arch/arm/mach-pxa/hx4700.c
@@ -33,6 +33,7 @@
 #include <linux/regulator/max1586.h>
 #include <linux/spi/ads7846.h>
 #include <linux/spi/spi.h>
+#include <linux/spi/pxa2xx_spi.h>
 #include <linux/usb/gpio_vbus.h>
 
 #include <mach/hardware.h>
@@ -43,7 +44,6 @@
 #include <mach/hx4700.h>
 #include <plat/i2c.h>
 #include <mach/irda.h>
-#include <mach/pxa2xx_spi.h>
 
 #include <video/platform_lcd.h>
 #include <video/w100fb.h>
diff --git a/arch/arm/mach-pxa/icontrol.c b/arch/arm/mach-pxa/icontrol.c
index d51ee3d25e7..3ab6fd36958 100644
--- a/arch/arm/mach-pxa/icontrol.c
+++ b/arch/arm/mach-pxa/icontrol.c
@@ -24,7 +24,7 @@
 #include <mach/mxm8x10.h>
 
 #include <linux/spi/spi.h>
-#include <mach/pxa2xx_spi.h>
+#include <linux/spi/pxa2xx_spi.h>
 #include <linux/can/platform/mcp251x.h>
 
 #include "generic.h"
diff --git a/arch/arm/mach-pxa/include/mach/pxa2xx_spi.h b/arch/arm/mach-pxa/include/mach/pxa2xx_spi.h
deleted file mode 100644
index b87cecd9bbd..00000000000
--- a/arch/arm/mach-pxa/include/mach/pxa2xx_spi.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Copyright (C) 2005 Stephen Street / StreetFire Sound Labs
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#ifndef PXA2XX_SPI_H_
-#define PXA2XX_SPI_H_
-
-#define PXA2XX_CS_ASSERT (0x01)
-#define PXA2XX_CS_DEASSERT (0x02)
-
-/* device.platform_data for SSP controller devices */
-struct pxa2xx_spi_master {
-	u32 clock_enable;
-	u16 num_chipselect;
-	u8 enable_dma;
-};
-
-/* spi_board_info.controller_data for SPI slave devices,
- * copied to spi_device.platform_data ... mostly for dma tuning
- */
-struct pxa2xx_spi_chip {
-	u8 tx_threshold;
-	u8 rx_threshold;
-	u8 dma_burst_size;
-	u32 timeout;
-	u8 enable_loopback;
-	int gpio_cs;
-	void (*cs_control)(u32 command);
-};
-
-extern void pxa2xx_set_spi_info(unsigned id, struct pxa2xx_spi_master *info);
-
-#endif /*PXA2XX_SPI_H_*/
diff --git a/arch/arm/mach-pxa/littleton.c b/arch/arm/mach-pxa/littleton.c
index 41aa89e3577..8051925d457 100644
--- a/arch/arm/mach-pxa/littleton.c
+++ b/arch/arm/mach-pxa/littleton.c
@@ -22,6 +22,7 @@
 #include <linux/clk.h>
 #include <linux/gpio.h>
 #include <linux/spi/spi.h>
+#include <linux/spi/pxa2xx_spi.h>
 #include <linux/smc91x.h>
 #include <linux/i2c.h>
 #include <linux/leds.h>
@@ -42,7 +43,6 @@
 #include <mach/pxa300.h>
 #include <mach/pxafb.h>
 #include <mach/mmc.h>
-#include <mach/pxa2xx_spi.h>
 #include <plat/pxa27x_keypad.h>
 #include <mach/littleton.h>
 #include <plat/i2c.h>
diff --git a/arch/arm/mach-pxa/lubbock.c b/arch/arm/mach-pxa/lubbock.c
index 1499493cd07..4a3fe450c20 100644
--- a/arch/arm/mach-pxa/lubbock.c
+++ b/arch/arm/mach-pxa/lubbock.c
@@ -25,7 +25,7 @@
 
 #include <linux/spi/spi.h>
 #include <linux/spi/ads7846.h>
-#include <mach/pxa2xx_spi.h>
+#include <linux/spi/pxa2xx_spi.h>
 
 #include <asm/setup.h>
 #include <asm/memory.h>
diff --git a/arch/arm/mach-pxa/pcm027.c b/arch/arm/mach-pxa/pcm027.c
index c77e8f30a43..a5596f9b17b 100644
--- a/arch/arm/mach-pxa/pcm027.c
+++ b/arch/arm/mach-pxa/pcm027.c
@@ -25,12 +25,12 @@
 #include <linux/mtd/physmap.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/max7301.h>
+#include <linux/spi/pxa2xx_spi.h>
 #include <linux/leds.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 #include <mach/pxa27x.h>
-#include <mach/pxa2xx_spi.h>
 #include <mach/pcm027.h>
 #include "generic.h"
 
diff --git a/arch/arm/mach-pxa/poodle.c b/arch/arm/mach-pxa/poodle.c
index 93a191c889d..c05eee32623 100644
--- a/arch/arm/mach-pxa/poodle.c
+++ b/arch/arm/mach-pxa/poodle.c
@@ -25,6 +25,7 @@
 #include <linux/i2c.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/ads7846.h>
+#include <linux/spi/pxa2xx_spi.h>
 #include <linux/mtd/sharpsl.h>
 
 #include <mach/hardware.h>
@@ -43,7 +44,6 @@
 #include <mach/irda.h>
 #include <mach/poodle.h>
 #include <mach/pxafb.h>
-#include <mach/pxa2xx_spi.h>
 #include <plat/i2c.h>
 
 #include <asm/hardware/scoop.h>
diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
index f736119f1eb..4fd5572f699 100644
--- a/arch/arm/mach-pxa/spitz.c
+++ b/arch/arm/mach-pxa/spitz.c
@@ -23,7 +23,7 @@
 #include <linux/spi/spi.h>
 #include <linux/spi/ads7846.h>
 #include <linux/spi/corgi_lcd.h>
-#include <linux/mtd/physmap.h>
+#include <linux/spi/pxa2xx_spi.h>
 #include <linux/mtd/sharpsl.h>
 #include <linux/input/matrix_keypad.h>
 #include <linux/regulator/machine.h>
@@ -41,7 +41,6 @@
 #include <mach/mmc.h>
 #include <mach/ohci.h>
 #include <mach/pxafb.h>
-#include <mach/pxa2xx_spi.h>
 #include <mach/spitz.h>
 #include <mach/sharpsl_pm.h>
 
diff --git a/arch/arm/mach-pxa/stargate2.c b/arch/arm/mach-pxa/stargate2.c
index 738adc1773f..325f6ac6b59 100644
--- a/arch/arm/mach-pxa/stargate2.c
+++ b/arch/arm/mach-pxa/stargate2.c
@@ -46,10 +46,10 @@
 #include <plat/i2c.h>
 #include <mach/mmc.h>
 #include <mach/udc.h>
-#include <mach/pxa2xx_spi.h>
 #include <mach/pxa27x-udc.h>
 
 #include <linux/spi/spi.h>
+#include <linux/spi/pxa2xx_spi.h>
 #include <linux/mfd/da903x.h>
 #include <linux/sht15.h>
 
diff --git a/arch/arm/mach-pxa/tosa.c b/arch/arm/mach-pxa/tosa.c
index 0ee1df49606..7b5765dacbd 100644
--- a/arch/arm/mach-pxa/tosa.c
+++ b/arch/arm/mach-pxa/tosa.c
@@ -32,6 +32,7 @@
 #include <linux/gpio.h>
 #include <linux/pda_power.h>
 #include <linux/spi/spi.h>
+#include <linux/spi/pxa2xx_spi.h>
 #include <linux/input/matrix_keypad.h>
 
 #include <asm/setup.h>
@@ -44,7 +45,6 @@
 #include <mach/mmc.h>
 #include <mach/udc.h>
 #include <mach/tosa_bt.h>
-#include <mach/pxa2xx_spi.h>
 #include <mach/audio.h>
 
 #include <asm/mach/arch.h>
diff --git a/arch/arm/mach-pxa/trizeps4.c b/arch/arm/mach-pxa/trizeps4.c
index 565d062f51d..bdb02a0ae1b 100644
--- a/arch/arm/mach-pxa/trizeps4.c
+++ b/arch/arm/mach-pxa/trizeps4.c
@@ -40,7 +40,6 @@
 #include <asm/mach/flash.h>
 
 #include <mach/pxa27x.h>
-#include <mach/pxa2xx_spi.h>
 #include <mach/trizeps4.h>
 #include <mach/audio.h>
 #include <mach/pxafb.h>
diff --git a/arch/arm/mach-pxa/z2.c b/arch/arm/mach-pxa/z2.c
index fefde9848d8..1b8b71b3c71 100644
--- a/arch/arm/mach-pxa/z2.c
+++ b/arch/arm/mach-pxa/z2.c
@@ -20,6 +20,7 @@
 #include <linux/z2_battery.h>
 #include <linux/dma-mapping.h>
 #include <linux/spi/spi.h>
+#include <linux/spi/pxa2xx_spi.h>
 #include <linux/spi/libertas_spi.h>
 #include <linux/spi/lms283gf05.h>
 #include <linux/power_supply.h>
@@ -38,7 +39,6 @@
 #include <mach/pxafb.h>
 #include <mach/mmc.h>
 #include <plat/pxa27x_keypad.h>
-#include <mach/pxa2xx_spi.h>
 
 #include <plat/i2c.h>
 
diff --git a/arch/arm/mach-pxa/zeus.c b/arch/arm/mach-pxa/zeus.c
index dea46a2d089..f5c9f3032c3 100644
--- a/arch/arm/mach-pxa/zeus.c
+++ b/arch/arm/mach-pxa/zeus.c
@@ -20,6 +20,7 @@
 #include <linux/dm9000.h>
 #include <linux/mmc/host.h>
 #include <linux/spi/spi.h>
+#include <linux/spi/pxa2xx_spi.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 #include <linux/mtd/physmap.h>
@@ -41,7 +42,6 @@
 #include <mach/pxa27x-udc.h>
 #include <mach/udc.h>
 #include <mach/pxafb.h>
-#include <mach/pxa2xx_spi.h>
 #include <mach/mfp-pxa27x.h>
 #include <mach/pm.h>
 #include <mach/audio.h>
diff --git a/arch/arm/plat-pxa/ssp.c b/arch/arm/plat-pxa/ssp.c
index c6357e554ab..58b79809d20 100644
--- a/arch/arm/plat-pxa/ssp.c
+++ b/arch/arm/plat-pxa/ssp.c
@@ -28,11 +28,11 @@
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/platform_device.h>
+#include <linux/spi/pxa2xx_spi.h>
 #include <linux/io.h>
 
 #include <asm/irq.h>
 #include <mach/hardware.h>
-#include <plat/ssp.h>
 
 static DEFINE_MUTEX(ssp_lock);
 static LIST_HEAD(ssp_list);
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 6efac5fd439..1906840c111 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -270,12 +270,15 @@ config SPI_PPC4xx
 
 config SPI_PXA2XX
 	tristate "PXA2xx SSP SPI master"
-	depends on ARCH_PXA && EXPERIMENTAL
-	select PXA_SSP
+	depends on (ARCH_PXA || (X86_32 && PCI)) && EXPERIMENTAL
+	select PXA_SSP if ARCH_PXA
 	help
-	  This enables using a PXA2xx SSP port as a SPI master controller.
-	  The driver can be configured to use any SSP port and additional
-	  documentation can be found a Documentation/spi/pxa2xx.
+	  This enables using a PXA2xx or Sodaville SSP port as a SPI master
+	  controller. The driver can be configured to use any SSP port and
+	  additional documentation can be found a Documentation/spi/pxa2xx.
+
+config SPI_PXA2XX_PCI
+	def_bool SPI_PXA2XX && X86_32 && PCI
 
 config SPI_S3C24XX
 	tristate "Samsung S3C24XX series SPI"
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 7ec375b6c0c..3a42463c92a 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_SPI_GPIO)			+= spi_gpio.o
 obj-$(CONFIG_SPI_IMX)			+= spi_imx.o
 obj-$(CONFIG_SPI_LM70_LLP)		+= spi_lm70llp.o
 obj-$(CONFIG_SPI_PXA2XX)		+= pxa2xx_spi.o
+obj-$(CONFIG_SPI_PXA2XX_PCI)		+= pxa2xx_spi_pci.o
 obj-$(CONFIG_SPI_OMAP_UWIRE)		+= omap_uwire.o
 obj-$(CONFIG_SPI_OMAP24XX)		+= omap2_mcspi.o
 obj-$(CONFIG_SPI_OMAP_100K)		+= omap_spi_100k.o
diff --git a/drivers/spi/pxa2xx_spi.c b/drivers/spi/pxa2xx_spi.c
index e76b1afafe0..95928833855 100644
--- a/drivers/spi/pxa2xx_spi.c
+++ b/drivers/spi/pxa2xx_spi.c
@@ -23,11 +23,11 @@
 #include <linux/errno.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
+#include <linux/spi/pxa2xx_spi.h>
 #include <linux/dma-mapping.h>
 #include <linux/spi/spi.h>
 #include <linux/workqueue.h>
 #include <linux/delay.h>
-#include <linux/clk.h>
 #include <linux/gpio.h>
 #include <linux/slab.h>
 
@@ -35,9 +35,6 @@
 #include <asm/irq.h>
 #include <asm/delay.h>
 
-#include <mach/dma.h>
-#include <plat/ssp.h>
-#include <mach/pxa2xx_spi.h>
 
 MODULE_AUTHOR("Stephen Street");
 MODULE_DESCRIPTION("PXA2xx SSP SPI Controller");
@@ -46,8 +43,6 @@ MODULE_ALIAS("platform:pxa2xx-spi");
 
 #define MAX_BUSES 3
 
-#define RX_THRESH_DFLT 	8
-#define TX_THRESH_DFLT 	8
 #define TIMOUT_DFLT		1000
 
 #define DMA_INT_MASK		(DCSR_ENDINTR | DCSR_STARTINTR | DCSR_BUSERR)
@@ -168,7 +163,10 @@ struct chip_data {
 	u8 enable_dma;
 	u8 bits_per_word;
 	u32 speed_hz;
-	int gpio_cs;
+	union {
+		int gpio_cs;
+		unsigned int frm;
+	};
 	int gpio_cs_inverted;
 	int (*write)(struct driver_data *drv_data);
 	int (*read)(struct driver_data *drv_data);
@@ -181,6 +179,11 @@ static void cs_assert(struct driver_data *drv_data)
 {
 	struct chip_data *chip = drv_data->cur_chip;
 
+	if (drv_data->ssp_type == CE4100_SSP) {
+		write_SSSR(drv_data->cur_chip->frm, drv_data->ioaddr);
+		return;
+	}
+
 	if (chip->cs_control) {
 		chip->cs_control(PXA2XX_CS_ASSERT);
 		return;
@@ -194,6 +197,9 @@ static void cs_deassert(struct driver_data *drv_data)
 {
 	struct chip_data *chip = drv_data->cur_chip;
 
+	if (drv_data->ssp_type == CE4100_SSP)
+		return;
+
 	if (chip->cs_control) {
 		chip->cs_control(PXA2XX_CS_DEASSERT);
 		return;
@@ -203,6 +209,25 @@ static void cs_deassert(struct driver_data *drv_data)
 		gpio_set_value(chip->gpio_cs, !chip->gpio_cs_inverted);
 }
 
+static void write_SSSR_CS(struct driver_data *drv_data, u32 val)
+{
+	void __iomem *reg = drv_data->ioaddr;
+
+	if (drv_data->ssp_type == CE4100_SSP)
+		val |= read_SSSR(reg) & SSSR_ALT_FRM_MASK;
+
+	write_SSSR(val, reg);
+}
+
+static int pxa25x_ssp_comp(struct driver_data *drv_data)
+{
+	if (drv_data->ssp_type == PXA25x_SSP)
+		return 1;
+	if (drv_data->ssp_type == CE4100_SSP)
+		return 1;
+	return 0;
+}
+
 static int flush(struct driver_data *drv_data)
 {
 	unsigned long limit = loops_per_jiffy << 1;
@@ -214,7 +239,7 @@ static int flush(struct driver_data *drv_data)
 			read_SSDR(reg);
 		}
 	} while ((read_SSSR(reg) & SSSR_BSY) && --limit);
-	write_SSSR(SSSR_ROR, reg);
+	write_SSSR_CS(drv_data, SSSR_ROR);
 
 	return limit;
 }
@@ -224,7 +249,7 @@ static int null_writer(struct driver_data *drv_data)
 	void __iomem *reg = drv_data->ioaddr;
 	u8 n_bytes = drv_data->n_bytes;
 
-	if (((read_SSSR(reg) & 0x00000f00) == 0x00000f00)
+	if (((read_SSSR(reg) & SSSR_TFL_MASK) == SSSR_TFL_MASK)
 		|| (drv_data->tx == drv_data->tx_end))
 		return 0;
 
@@ -252,7 +277,7 @@ static int u8_writer(struct driver_data *drv_data)
 {
 	void __iomem *reg = drv_data->ioaddr;
 
-	if (((read_SSSR(reg) & 0x00000f00) == 0x00000f00)
+	if (((read_SSSR(reg) & SSSR_TFL_MASK) == SSSR_TFL_MASK)
 		|| (drv_data->tx == drv_data->tx_end))
 		return 0;
 
@@ -279,7 +304,7 @@ static int u16_writer(struct driver_data *drv_data)
 {
 	void __iomem *reg = drv_data->ioaddr;
 
-	if (((read_SSSR(reg) & 0x00000f00) == 0x00000f00)
+	if (((read_SSSR(reg) & SSSR_TFL_MASK) == SSSR_TFL_MASK)
 		|| (drv_data->tx == drv_data->tx_end))
 		return 0;
 
@@ -306,7 +331,7 @@ static int u32_writer(struct driver_data *drv_data)
 {
 	void __iomem *reg = drv_data->ioaddr;
 
-	if (((read_SSSR(reg) & 0x00000f00) == 0x00000f00)
+	if (((read_SSSR(reg) & SSSR_TFL_MASK) == SSSR_TFL_MASK)
 		|| (drv_data->tx == drv_data->tx_end))
 		return 0;
 
@@ -507,9 +532,9 @@ static void dma_error_stop(struct driver_data *drv_data, const char *msg)
 	/* Stop and reset */
 	DCSR(drv_data->rx_channel) = RESET_DMA_CHANNEL;
 	DCSR(drv_data->tx_channel) = RESET_DMA_CHANNEL;
-	write_SSSR(drv_data->clear_sr, reg);
+	write_SSSR_CS(drv_data, drv_data->clear_sr);
 	write_SSCR1(read_SSCR1(reg) & ~drv_data->dma_cr1, reg);
-	if (drv_data->ssp_type != PXA25x_SSP)
+	if (!pxa25x_ssp_comp(drv_data))
 		write_SSTO(0, reg);
 	flush(drv_data);
 	write_SSCR0(read_SSCR0(reg) & ~SSCR0_SSE, reg);
@@ -529,7 +554,7 @@ static void dma_transfer_complete(struct driver_data *drv_data)
 
 	/* Clear and disable interrupts on SSP and DMA channels*/
 	write_SSCR1(read_SSCR1(reg) & ~drv_data->dma_cr1, reg);
-	write_SSSR(drv_data->clear_sr, reg);
+	write_SSSR_CS(drv_data, drv_data->clear_sr);
 	DCSR(drv_data->tx_channel) = RESET_DMA_CHANNEL;
 	DCSR(drv_data->rx_channel) = RESET_DMA_CHANNEL;
 
@@ -622,7 +647,7 @@ static irqreturn_t dma_transfer(struct driver_data *drv_data)
 
 		/* Clear and disable timeout interrupt, do the rest in
 		 * dma_transfer_complete */
-		if (drv_data->ssp_type != PXA25x_SSP)
+		if (!pxa25x_ssp_comp(drv_data))
 			write_SSTO(0, reg);
 
 		/* finish this transfer, start the next */
@@ -635,14 +660,26 @@ static irqreturn_t dma_transfer(struct driver_data *drv_data)
 	return IRQ_NONE;
 }
 
+static void reset_sccr1(struct driver_data *drv_data)
+{
+	void __iomem *reg = drv_data->ioaddr;
+	struct chip_data *chip = drv_data->cur_chip;
+	u32 sccr1_reg;
+
+	sccr1_reg = read_SSCR1(reg) & ~drv_data->int_cr1;
+	sccr1_reg &= ~SSCR1_RFT;
+	sccr1_reg |= chip->threshold;
+	write_SSCR1(sccr1_reg, reg);
+}
+
 static void int_error_stop(struct driver_data *drv_data, const char* msg)
 {
 	void __iomem *reg = drv_data->ioaddr;
 
 	/* Stop and reset SSP */
-	write_SSSR(drv_data->clear_sr, reg);
-	write_SSCR1(read_SSCR1(reg) & ~drv_data->int_cr1, reg);
-	if (drv_data->ssp_type != PXA25x_SSP)
+	write_SSSR_CS(drv_data, drv_data->clear_sr);
+	reset_sccr1(drv_data);
+	if (!pxa25x_ssp_comp(drv_data))
 		write_SSTO(0, reg);
 	flush(drv_data);
 	write_SSCR0(read_SSCR0(reg) & ~SSCR0_SSE, reg);
@@ -658,9 +695,9 @@ static void int_transfer_complete(struct driver_data *drv_data)
 	void __iomem *reg = drv_data->ioaddr;
 
 	/* Stop SSP */
-	write_SSSR(drv_data->clear_sr, reg);
-	write_SSCR1(read_SSCR1(reg) & ~drv_data->int_cr1, reg);
-	if (drv_data->ssp_type != PXA25x_SSP)
+	write_SSSR_CS(drv_data, drv_data->clear_sr);
+	reset_sccr1(drv_data);
+	if (!pxa25x_ssp_comp(drv_data))
 		write_SSTO(0, reg);
 
 	/* Update total byte transfered return count actual bytes read */
@@ -714,24 +751,34 @@ static irqreturn_t interrupt_transfer(struct driver_data *drv_data)
 	}
 
 	if (drv_data->tx == drv_data->tx_end) {
-		write_SSCR1(read_SSCR1(reg) & ~SSCR1_TIE, reg);
-		/* PXA25x_SSP has no timeout, read trailing bytes */
-		if (drv_data->ssp_type == PXA25x_SSP) {
-			if (!wait_ssp_rx_stall(reg))
-			{
-				int_error_stop(drv_data, "interrupt_transfer: "
-						"rx stall failed");
-				return IRQ_HANDLED;
-			}
-			if (!drv_data->read(drv_data))
-			{
-				int_error_stop(drv_data,
-						"interrupt_transfer: "
-						"trailing byte read failed");
-				return IRQ_HANDLED;
+		u32 bytes_left;
+		u32 sccr1_reg;
+
+		sccr1_reg = read_SSCR1(reg);
+		sccr1_reg &= ~SSCR1_TIE;
+
+		/*
+		 * PXA25x_SSP has no timeout, set up rx threshould for the
+		 * remaing RX bytes.
+		 */
+		if (pxa25x_ssp_comp(drv_data)) {
+
+			sccr1_reg &= ~SSCR1_RFT;
+
+			bytes_left = drv_data->rx_end - drv_data->rx;
+			switch (drv_data->n_bytes) {
+			case 4:
+				bytes_left >>= 1;
+			case 2:
+				bytes_left >>= 1;
 			}
-			int_transfer_complete(drv_data);
+
+			if (bytes_left > RX_THRESH_DFLT)
+				bytes_left = RX_THRESH_DFLT;
+
+			sccr1_reg |= SSCR1_RxTresh(bytes_left);
 		}
+		write_SSCR1(sccr1_reg, reg);
 	}
 
 	/* We did something */
@@ -742,14 +789,26 @@ static irqreturn_t ssp_int(int irq, void *dev_id)
 {
 	struct driver_data *drv_data = dev_id;
 	void __iomem *reg = drv_data->ioaddr;
+	u32 sccr1_reg = read_SSCR1(reg);
+	u32 mask = drv_data->mask_sr;
+	u32 status;
+
+	status = read_SSSR(reg);
+
+	/* Ignore possible writes if we don't need to write */
+	if (!(sccr1_reg & SSCR1_TIE))
+		mask &= ~SSSR_TFS;
+
+	if (!(status & mask))
+		return IRQ_NONE;
 
 	if (!drv_data->cur_msg) {
 
 		write_SSCR0(read_SSCR0(reg) & ~SSCR0_SSE, reg);
 		write_SSCR1(read_SSCR1(reg) & ~drv_data->int_cr1, reg);
-		if (drv_data->ssp_type != PXA25x_SSP)
+		if (!pxa25x_ssp_comp(drv_data))
 			write_SSTO(0, reg);
-		write_SSSR(drv_data->clear_sr, reg);
+		write_SSSR_CS(drv_data, drv_data->clear_sr);
 
 		dev_err(&drv_data->pdev->dev, "bad message state "
 			"in interrupt handler\n");
@@ -862,7 +921,7 @@ static unsigned int ssp_get_clk_div(struct ssp_device *ssp, int rate)
 {
 	unsigned long ssp_clk = clk_get_rate(ssp->clk);
 
-	if (ssp->type == PXA25x_SSP)
+	if (ssp->type == PXA25x_SSP || ssp->type == CE4100_SSP)
 		return ((ssp_clk / (2 * rate) - 1) & 0xff) << 8;
 	else
 		return ((ssp_clk / rate - 1) & 0xfff) << 8;
@@ -1088,7 +1147,7 @@ static void pump_transfers(unsigned long data)
 
 		/* Clear status  */
 		cr1 = chip->cr1 | chip->threshold | drv_data->int_cr1;
-		write_SSSR(drv_data->clear_sr, reg);
+		write_SSSR_CS(drv_data, drv_data->clear_sr);
 	}
 
 	/* see if we need to reload the config registers */
@@ -1098,7 +1157,7 @@ static void pump_transfers(unsigned long data)
 
 		/* stop the SSP, and update the other bits */
 		write_SSCR0(cr0 & ~SSCR0_SSE, reg);
-		if (drv_data->ssp_type != PXA25x_SSP)
+		if (!pxa25x_ssp_comp(drv_data))
 			write_SSTO(chip->timeout, reg);
 		/* first set CR1 without interrupt and service enables */
 		write_SSCR1(cr1 & SSCR1_CHANGE_MASK, reg);
@@ -1106,7 +1165,7 @@ static void pump_transfers(unsigned long data)
 		write_SSCR0(cr0, reg);
 
 	} else {
-		if (drv_data->ssp_type != PXA25x_SSP)
+		if (!pxa25x_ssp_comp(drv_data))
 			write_SSTO(chip->timeout, reg);
 	}
 
@@ -1233,14 +1292,13 @@ static int setup(struct spi_device *spi)
 	uint tx_thres = TX_THRESH_DFLT;
 	uint rx_thres = RX_THRESH_DFLT;
 
-	if (drv_data->ssp_type != PXA25x_SSP
+	if (!pxa25x_ssp_comp(drv_data)
 		&& (spi->bits_per_word < 4 || spi->bits_per_word > 32)) {
 		dev_err(&spi->dev, "failed setup: ssp_type=%d, bits/wrd=%d "
 				"b/w not 4-32 for type non-PXA25x_SSP\n",
 				drv_data->ssp_type, spi->bits_per_word);
 		return -EINVAL;
-	}
-	else if (drv_data->ssp_type == PXA25x_SSP
+	} else if (pxa25x_ssp_comp(drv_data)
 			&& (spi->bits_per_word < 4
 				|| spi->bits_per_word > 16)) {
 		dev_err(&spi->dev, "failed setup: ssp_type=%d, bits/wrd=%d "
@@ -1259,7 +1317,17 @@ static int setup(struct spi_device *spi)
 			return -ENOMEM;
 		}
 
-		chip->gpio_cs = -1;
+		if (drv_data->ssp_type == CE4100_SSP) {
+			if (spi->chip_select > 4) {
+				dev_err(&spi->dev, "failed setup: "
+				"cs number must not be > 4.\n");
+				kfree(chip);
+				return -EINVAL;
+			}
+
+			chip->frm = spi->chip_select;
+		} else
+			chip->gpio_cs = -1;
 		chip->enable_dma = 0;
 		chip->timeout = TIMOUT_DFLT;
 		chip->dma_burst_size = drv_data->master_info->enable_dma ?
@@ -1315,7 +1383,7 @@ static int setup(struct spi_device *spi)
 			| (((spi->mode & SPI_CPOL) != 0) ? SSCR1_SPO : 0);
 
 	/* NOTE:  PXA25x_SSP _could_ use e