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path: root/drivers/i2c/designware_i2c.c
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* i2c: designware_i2c: Optionally check enable status registerStefan Roese2016-05-17-0/+9
| | | | | | | | | | | | | Some platforms don't implement the enable status register at offset 0x9c. The SPEAr600 platform is one of them. The recently added check to this status register can't be performend on these platforms. This patch introduces a new config option that can be enabled on such platforms not supporting this register. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Heiko Schocher <hs@denx.de> Reviewed-by: Heiko Schocher <hs@denx.de>
* i2c: designware_i2c: Add support for PCI(e) based I2C cores (x86)Stefan Roese2016-04-25-12/+106
| | | | | | | | | | | | | | | | This patch adds support for the PCI(e) based I2C cores. Which can be found for example on the Intel Bay Trail SoC. It has 7 I2C controllers implemented as PCI devices. This patch also adds the fixed values for the timing registers for BayTrail which are taken from the Linux designware I2C driver. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Simon Glass <sjg@chromium.org> Cc: Bin Meng <bmeng.cn@gmail.com> Cc: Marek Vasut <marex@denx.de> Cc: Heiko Schocher <hs@denx.de> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
* i2c: designware_i2c: Add DM supportStefan Roese2016-04-25-26/+123
| | | | | | | | | | | | This patch adds DM support to the designware I2C driver. It currently supports DM and the legacy I2C support. The legacy support should be removed, once all platforms using it have DM enabled. Signed-off-by: Stefan Roese <sr@denx.de> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Cc: Marek Vasut <marex@denx.de> Cc: Heiko Schocher <hs@denx.de>
* i2c: designware_i2c: Prepare for DM driver conversionStefan Roese2016-04-25-83/+90
| | | | | | | | | | | | This patch prepares the designware I2C driver for the DM conversion. This is mainly done by removing struct i2c_adapter from the functions that shall be used by the DM driver version as well. Signed-off-by: Stefan Roese <sr@denx.de> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Cc: Marek Vasut <marex@denx.de> Cc: Heiko Schocher <hs@denx.de>
* i2c: designware_i2c: Integrate set_speed() into dw_i2c_set_bus_speed()Stefan Roese2016-04-25-24/+13
| | | | | | | | | | | Integrating set_speed() into dw_i2c_set_bus_speed() will make the conversion to DM easier for this driver. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Cc: Marek Vasut <marex@denx.de> Cc: Heiko Schocher <hs@denx.de>
* i2c: designware_i2c: Add dw_i2c_enable() helper functionStefan Roese2016-04-25-20/+27
| | | | | | | | | | | | | | | dw_i2c_enable() is used to dis-/en-able the I2C controller. It makes sense to add such a function, as the controller is dis-/en-abled multiple times in the code. Additionally, this function now checks, if the controller is really dis-/en-abled. This code is copied from the Linux I2C driver version. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Simon Glass <sjg@chromium.org> Cc: Bin Meng <bmeng.cn@gmail.com> Cc: Marek Vasut <marex@denx.de> Cc: Heiko Schocher <hs@denx.de> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
* i2c: designware: Convert driver to multibus/multiadapter frameworkStefan Roese2014-10-29-166/+127
| | | | | | | | | | | | | | | | | | | | | 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>
* i2c: designware: add an implement i2c protosJeroen Hofstee2014-10-25-7/+12
| | | | | | | | | | | 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>
* designware_i2c: remove inclusion of <asm/arch/hardware.h>Alexey Brodkin2014-02-20-1/+0
| | | | | | | | | | | | | | 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>
* designware_i2c: Enhance DesignWare I2C driver address supportChin Liang See2014-02-20-32/+9
| | | | | | | | | | | | | | 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>
* drivers/designware_i2c - add suppor of CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOWAlexey Brodkin2014-01-13-0/+38
| | | | | | | | | | | | | | | | | | | 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>
* designware_i2c: remove 10msec delay in i2c_xfer_finishAlexey Brodkin2013-11-13-3/+0
| | | | | | | | | | | | | | | | | | | | | 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>
* designware_i2c: disable i2c controller during target address setupAlexey Brodkin2013-11-13-0/+12
| | | | | | | | | | | | | | | | 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>
* Add GPL-2.0+ SPDX-License-Identifier to source filesWolfgang Denk2013-07-24-17/+1
| | | | | | Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
* designware_i2c: Fixed the setting of the i2c bus speedArmando Visconti2012-12-11-15/+13
| | | | | | | | 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>
* designware_i2c: Added s/w generation of stop bitArmando Visconti2012-12-11-3/+8
| | | | | | | | | | | | | | | 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>
* designware_i2c.c: Added the support for MULTI_BUSArmando Visconti2012-12-11-1/+81
| | | | | | | 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>
* i2c: designware_i2c.c: Add support for the "i2c probe" commandStefan Roese2012-07-07-6/+10
| | | | | | | | | | | | | | | 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>
* i2c:designware Turn off the ctrl when setting the speedArmando Visconti2012-04-24-0/+11
| | | | | | | | | | 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>
* i2c: Add support for designware i2c controllerVipin KUMAR2012-04-24-0/+331
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>
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