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path: root/drivers/i2c/designware_i2c.c
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2014-10-29i2c: designware: Convert driver to multibus/multiadapter frameworkStefan Roese
In preparation for the SoCFPGA support of the designware I2C driver, convert this driver to the common CONFIG_SYS_I2C framework. This patch converts all users of this driver, this is: - ST spearxxx boards - AXS101 (ARC700 platform) I couldn't test this patch on those boards. Only compile tested for all spear boards. And tested on SoCFPGA. Signed-off-by: Stefan Roese <sr@denx.de> Reviewed-by: Marek Vasut <marex@denx.de> Acked-by: Alexey Brodkin <abrodkin@synopsys.com> Tested-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Heiko Schocher <hs@denx.de> Cc: Vipin Kumar <vk.vipin@gmail.com> Cc: Jeroen Hofstee <jeroen@myspectrum.nl>
2014-10-25i2c: designware: add an implement i2c protosJeroen Hofstee
Include the i2c header and change the non confirming functions to do so. Cc: Heiko Schocher <hs@denx.de> Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl> Acked-by: Heiko Schocher <hs@denx.de> [trini: Fix i2c_get_bus_num prototype] Signed-off-by: Tom Rini <trini@ti.com>
2014-02-20designware_i2c: remove inclusion of <asm/arch/hardware.h>Alexey Brodkin
As soon as all boards have their CONFIG_SYS_I2C_BASE defined in configuration files instead of "asm/arch/hardware.h" it's safe to remove the inclusion in question and make driver platform-independent. Cc: Tom Rini <trini@ti.com> Cc: Heiko Schocher <hs@denx.de> Cc: Stefan Roese <sr@denx.de> Cc: Vipin Kumar <vipin.kumar@st.com> Cc: Armando Visconti <armando.visconti@st.com> Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2014-02-20designware_i2c: Enhance DesignWare I2C driver address supportChin Liang See
Enhance the DesignWare I2C driver to support address length more than 1 byte. This enhancement is required as some I2C slave device such as EEPROM chip might have 16 bit address byte. Signed-off-by: Chin Liang See <clsee@altera.com> Acked-by: Alexey Brodkin <Alexey.Brodkin@synopsys.com> Cc: Tom Rini <trini@ti.com> cc: Armando Visconti <armando.visconti@st.com> Cc: Stefan Roese <sr@denx.de> Cc: Albert ARIBAUD <albert.u.boot@aribaud.net> Cc: Heiko Schocher <hs@denx.de>
2014-01-13drivers/designware_i2c - add suppor of CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOWAlexey Brodkin
Since we agreed on legacy implementation of "eeprom_{read|write}" (http://patchwork.ozlabs.org/patch/295825/) I had to fix/make it work again DesignWare I2C driver for cases when 1 EEPROM IC fake I2C with anumber of "built-in" ICs with different chip addresses. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Tom Rini <trini@ti.com> cc: Armando Visconti <armando.visconti@st.com> Cc: Stefan Roese <sr@denx.de> Cc: Albert ARIBAUD <albert.u.boot@aribaud.net> Cc: Heiko Schocher <hs@denx.de> Cc: Vipin KUMAR <vipin.kumar@st.com> Cc: Tom Rix <Tom.Rix@windriver.com> Cc: Mischa Jonker <mjonker@synopsys.com> Cc: Kuo-Jung Su <dantesu@faraday-tech.com>
2013-11-13designware_i2c: remove 10msec delay in i2c_xfer_finishAlexey Brodkin
This delay applies to any data transfer on I2C bus. For example 1kB data read with per-byte access (which happens if environment is stored in I2C EEPROM) takes more than 10 seconds. Moreover data bus driver has to care about bus state and data transfer, but not about internal states of attached devices. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Tom Rini <trini@ti.com> cc: Armando Visconti <armando.visconti@st.com> Cc: Stefan Roese <sr@denx.de> Cc: Albert ARIBAUD <albert.u.boot@aribaud.net> Cc: Heiko Schocher <hs@denx.de> Cc: Vipin KUMAR <vipin.kumar@st.com> Cc: Tom Rix <Tom.Rix@windriver.com> Cc: Mischa Jonker <mjonker@synopsys.com>
2013-11-13designware_i2c: disable i2c controller during target address setupAlexey Brodkin
As it is stated in DesignWare I2C databook: writes to IC_TAR (0x4) register succeed only when IC_ENABLE[0] is set to 0. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Tom Rini <trini@ti.com> cc: Armando Visconti <armando.visconti@st.com> Cc: Stefan Roese <sr@denx.de> Cc: Albert ARIBAUD <albert.u.boot@aribaud.net> Cc: Heiko Schocher <hs@denx.de> Cc: Vipin KUMAR <vipin.kumar@st.com> Cc: Tom Rix <Tom.Rix@windriver.com> Cc: Mischa Jonker <mjonker@synopsys.com>
2013-07-24Add GPL-2.0+ SPDX-License-Identifier to source filesWolfgang Denk
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
2012-12-11designware_i2c: Fixed the setting of the i2c bus speedArmando Visconti
There are three couple (hcnt/lcnt) of registers for each speed (SS/FS/HS). The driver needs to set the proper couple of regs according to what speed we are setting. Signed-off-by: Armando Visconti <armando.visconti@st.com>
2012-12-11designware_i2c: Added s/w generation of stop bitArmando Visconti
In the newer versions of designware i2c IP there is the possibility of configuring it with IC_EMPTYFIFO_HOLD_MASTER_EN=1, which basically requires the s/w to generate the stop bit condition directly, as the h/w will not automatically generate it when TX_FIFO is empty. To avoid generation of an extra 0x0 byte sent as data, the IC_STOP command must be sent along with the last IC_CMD. This patch always writes bit[9] of ic_data_cmd even in the older versions, assuming that it is a noop there. Signed-off-by: Armando Visconti <armando.visconti@st.com>
2012-12-11designware_i2c.c: Added the support for MULTI_BUSArmando Visconti
This patch adds the capability to switch between 10 different I2C busses (from 0 to 9). Signed-off-by: Armando Visconti <armando.visconti@st.com>
2012-07-07i2c: designware_i2c.c: Add support for the "i2c probe" commandStefan Roese
i2c_probe() is changed to reinit the i2c bus upon read failure. This is naturally the case upon i2c bus probing. Also, some printf messages upon read failure are removed. As they would interfere with the "i2c probe" command. Additionally, i2c_set_bus_speed() now returns 0, so that the "i2c speed" command can be used. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Amit Virdi <amit.virdi@st.com> Cc: Vipin Kumar <vipin.kumar@st.com>
2012-04-24i2c:designware Turn off the ctrl when setting the speedArmando Visconti
The designware i2c controller must be turned off before setting the speed in IC_CON register, as stated in the section 6.3.1 of the dw_apb_i2c_db.pdf. Signed-off-by: Michel Sanches <michel.sanches@st.com> Signed-off-by: Armando Visconti <armando.visconti@st.com> Signed-off-by: Amit Virdi <amit.virdi@st.com>
2012-04-24i2c: Add support for designware i2c controllerVipin KUMAR
Earlier, a driver exists in the u-boot source for designware i2c interface. That driver was specific to spear platforms. This patch implements the i2c controller as a generic driver which can be used by multiple platforms The driver files are now renamed to designware_i2c.c and designware_i2c.h and these are moved into drivers/i2c folder for reusability by other platforms Signed-off-by: Vipin Kumar <vipin.kumar@st.com> Signed-off-by: Amit Virdi <amit.virdi@st.com>