From 03df0f629483f941f83ee2fbb180a4425e99dd23 Mon Sep 17 00:00:00 2001 From: Cyril Chemparathy Date: Tue, 18 Jan 2011 19:21:35 +0000 Subject: mfd: add driver for sequencer serial port TI's sequencer serial port (TI-SSP) is a jack-of-all-trades type of serial port device. It has a built-in programmable execution engine that can be programmed to operate as almost any serial bus (I2C, SPI, EasyScale, and others). This patch adds a driver for this controller device. The driver does not expose a user-land interface. Protocol drivers built on top of this layer are expected to remain in-kernel. Signed-off-by: Cyril Chemparathy Acked-by: Samuel Ortiz Signed-off-by: Sekhar Nori Signed-off-by: Kevin Hilman --- include/linux/mfd/ti_ssp.h | 87 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 include/linux/mfd/ti_ssp.h (limited to 'include/linux/mfd') diff --git a/include/linux/mfd/ti_ssp.h b/include/linux/mfd/ti_ssp.h new file mode 100644 index 000000000000..021fe0912435 --- /dev/null +++ b/include/linux/mfd/ti_ssp.h @@ -0,0 +1,87 @@ +/* + * Sequencer Serial Port (SSP) driver for Texas Instruments' SoCs + * + * Copyright (C) 2010 Texas Instruments Inc + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef __TI_SSP_H__ +#define __TI_SSP_H__ + +struct ti_ssp_dev_data { + const char *dev_name; + void *pdata; + size_t pdata_size; +}; + +struct ti_ssp_data { + unsigned long out_clock; + struct ti_ssp_dev_data dev_data[2]; +}; + +/* + * Sequencer port IO pin configuration bits. These do not correlate 1-1 with + * the hardware. The iosel field in the port data combines iosel1 and iosel2, + * and is therefore not a direct map to register space. It is best to use the + * macros below to construct iosel values. + * + * least significant 16 bits --> iosel1 + * most significant 16 bits --> iosel2 + */ + +#define SSP_IN 0x0000 +#define SSP_DATA 0x0001 +#define SSP_CLOCK 0x0002 +#define SSP_CHIPSEL 0x0003 +#define SSP_OUT 0x0004 +#define SSP_PIN_SEL(pin, v) ((v) << ((pin) * 3)) +#define SSP_PIN_MASK(pin) SSP_PIN_SEL(pin, 0x7) +#define SSP_INPUT_SEL(pin) ((pin) << 16) + +/* Sequencer port config bits */ +#define SSP_EARLY_DIN BIT(8) +#define SSP_DELAY_DOUT BIT(9) + +/* Sequence map definitions */ +#define SSP_CLK_HIGH BIT(0) +#define SSP_CLK_LOW 0 +#define SSP_DATA_HIGH BIT(1) +#define SSP_DATA_LOW 0 +#define SSP_CS_HIGH BIT(2) +#define SSP_CS_LOW 0 +#define SSP_OUT_MODE BIT(3) +#define SSP_IN_MODE 0 +#define SSP_DATA_REG BIT(4) +#define SSP_ADDR_REG 0 + +#define SSP_OPCODE_DIRECT ((0x0) << 5) +#define SSP_OPCODE_TOGGLE ((0x1) << 5) +#define SSP_OPCODE_SHIFT ((0x2) << 5) +#define SSP_OPCODE_BRANCH0 ((0x4) << 5) +#define SSP_OPCODE_BRANCH1 ((0x5) << 5) +#define SSP_OPCODE_BRANCH ((0x6) << 5) +#define SSP_OPCODE_STOP ((0x7) << 5) +#define SSP_BRANCH(addr) ((addr) << 8) +#define SSP_COUNT(cycles) ((cycles) << 8) + +int ti_ssp_raw_read(struct device *dev); +int ti_ssp_raw_write(struct device *dev, u32 val); +int ti_ssp_load(struct device *dev, int offs, u32* prog, int len); +int ti_ssp_run(struct device *dev, u32 pc, u32 input, u32 *output); +int ti_ssp_set_mode(struct device *dev, int mode); +int ti_ssp_set_iosel(struct device *dev, u32 iosel); + +#endif /* __TI_SSP_H__ */ -- cgit v1.2.1 From a72aeefebe6545ad5c9c699e1121019c1709ca77 Mon Sep 17 00:00:00 2001 From: Cyril Chemparathy Date: Tue, 18 Jan 2011 19:21:36 +0000 Subject: spi: add ti-ssp spi master driver This patch adds an SPI master implementation that operates on top of an underlying TI-SSP port. Acked-by: Grant Likely Signed-off-by: Cyril Chemparathy Signed-off-by: Sekhar Nori Signed-off-by: Kevin Hilman --- include/linux/mfd/ti_ssp.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux/mfd') diff --git a/include/linux/mfd/ti_ssp.h b/include/linux/mfd/ti_ssp.h index 021fe0912435..dbb4b43bd20e 100644 --- a/include/linux/mfd/ti_ssp.h +++ b/include/linux/mfd/ti_ssp.h @@ -32,6 +32,12 @@ struct ti_ssp_data { struct ti_ssp_dev_data dev_data[2]; }; +struct ti_ssp_spi_data { + unsigned long iosel; + int num_cs; + void (*select)(int cs); +}; + /* * Sequencer port IO pin configuration bits. These do not correlate 1-1 with * the hardware. The iosel field in the port data combines iosel1 and iosel2, -- cgit v1.2.1