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authorWolfgang Denk <wd@denx.de>2011-11-08 00:38:52 +0100
committerWolfgang Denk <wd@denx.de>2011-11-08 00:38:52 +0100
commit688d8f33f27ea596efb6632388ee60360996eed0 (patch)
tree961e812048557d4ac7062e6a7387f543e7d634af /drivers/i2c
parent7ba6d591b5a6ec4ed502de7d94ff726bce13fe61 (diff)
parent2026a119512a9cced2957221e83fef92b8211d26 (diff)
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Merge branch 'master' of git://git.denx.de/u-boot-arm
* 'master' of git://git.denx.de/u-boot-arm: Arm: re-introduce the MACH_TYPE_XXXXXX for EB_CPUX9K2 board arm: jadecpu: Readd MACH_TYPE_JADECPU at91: defined mach-types for otc570 board in board config file at91: defined mach-types for meesc board in board config file mx31pdk: Enable D and I caches ehci-mxc: remove incorrect comment README: Fix supported i.MX SoC list for CONFIG_MXC_SPI mx53: Turn off child clocks before reconfigure perclk_root qong: enable support for compressed images imx: imx31_phycore.h: fix checkpatch warnings vision2: Remove unused get_board_rev function mx53smd: Remove unused get_board_rev function mx53ard: Remove unused get_board_rev function mx53evk: Remove unused get_board_rev function mx53evk: Add RTC support mx53loco: Remove unused get_board_rev function mx53evk: Remove unneeded '1' from mx53evk.h OMAP3: mvblx: Initial support for mvBlueLYNX-X ARM: dig297: Define MACH_TYPE_OMAP3_CPS and CONFIG_MACH_TYPE omap3: mem: Move comments next to definitions omap3: mem: Clean-up whitespaces omap3: mem: Define and use common macros Davinci: ea20: added PREBOOT to configuration Davinci: ea20: added I2C support Davinci: ea20: added video support VIDEO: davinci: add framebuffer to da8xx ARM: Davinci: added missing registers to hardware.h Davinci: ea20: add gpios for LCD backlight control Davinci: ea20: add gpio for keeping power on in board_late_init Davinci: ea20: Add default U-Boot environment Davinci: ea20: Add early init to get early output from console Davinci: ea20: Add NAND support Davinci: ea20: set GPIOs to hold MII-Phy in reset and set UART0-Switch for console Davinci: ea20: set console on UART0 arm, davinci: add cam_enc_4xx support arm926ejs, davinci: add missing spi defines for dm365 arm926ejs, davinci: add cpuinfo for dm365 arm, davinci: add lowlevel function for dm365 soc arm, davinci: add header files for dm365 spl, nand: add 4bit HW ecc oob first nand_read_page function arm, davinci: add support for new spl framework spl: add option for adding post memory test to the SPL framework net, davinci_emac: make clock divider in MDIO control register configurable arm, usb, davinci: make USBPHY_CTL register configurable usb, davinci: add enable_vbus() weak function omap3evm: fix errors caused by multiple definitions omap3evm: Add (quick) configuration for NAND only omap3evm: Add (quick) configuration for MMC/SD only omap3evm: move common config options to new file omap3evm: Prepare to split configuration omap3evm: Reorder related config options omap/spl: actually enable the console davinci_emac: compilation fix, phy is array now omap3evm: Set environment variable 'ethaddr' arm, arm926: fix missing symbols in NAND_SPL mode arm, davinci: Add function lpsc_syncreset() arm, davinci: replace CONFIG_PRELOADER with CONFIG_SPL_BUILD arm/km: portl2 environment address update to P1B arm/km: adapt bootcounter evaluation arm/km: enable jffs2 cmds arm/km: trigger reconfiguration for the Xilinx FPGA arm/km: add boardid and hwkey to kernel command line ARM: Reintroduce MACH_TYPE_KM_KIRKWOOD for keymile ARM boards netspace_v2: enable I2C EEPROM support netspace_v2: fix SDRAM configuration armada100: define CONFIG_SYS_CACHELINE_SIZE pantheon: define CONFIG_SYS_CACHELINE_SIZE kirkwood: define CONFIG_SYS_CACHELINE_SIZE kirkwood: drop empty asm-offsets.s file arm/km/mgcoge3un: enhance "waitforne" feature arm/km: add variable waitforne to mgcoge3un gplugD: Fix for error:MACH_TYPE_SHEEVAD undeclared ARM: dreamplug: fix compilation ARM: DockStar: fix compilation ARM: netspace_v2: fix warnings am335x: Drop board_sysinfo struct am335x: Temporarily add MACH_TYPE define misc:pmic:samsung Enable PMIC driver at C210 Universal target dcache:s5p CONFIG_SYS_CACHELINE_SIZE added for s5p UNIVERSAL C210 target dcache:s5p CONFIG_SYS_CACHELINE_SIZE added for s5p GONI target smdkv310: use macro for mmc data read function address smdkv310: use spl framework for mmc spl SMDKV310: use get_ram_size() to validate dram size SMDKV310: Initialize board id using CONFIG_MACH_TYPE ORIGEN : use absolute paths and fix tool naming ORIGEN : enable device tree support MX25: tx25: Fix building due to missing MACH_TYPE mx31: Add board support for HALE TT-01 mx31: add ESD control registers mx31: define pins and init for UART2 and CSPI3 MX35: add support for flea3 board MX51: vision2: add MACH_TYPE in config file vision2: Remove unused header file mx51evk: Remove unused get_board_rev function mx51evk: Remove unneeded '1' from mx51evk.h I2C: Fix mxc_i2c.c problem on imx31_phycore mx35pdk: Add RTC support mx51evk: Use GPIO API for configuring the IOMUX mx51evk: Add RTC support rtc: Make mc13783-rtc driver generic qong: remove unneeded IOMUX settings qong: Use mx31_set_gpr to setup USBH2 pins mx31: Introduce mx31_set_gpr function mx31pdk: Add MC13783 PMIC support qong: remove unneeded "1" from qong.h misc: pmic: fix regression in pmic_fsl.c (SPI) mx5 configs: CONFIG_PRIME should really be CONFIG_ETHPRIME MX35: Drop unnecessary prototypes from imx-regs.h I2C: added I2C-2 and I2C-3 to MX35 MX35: factorize common assembly code MX35: add reset cause as provided by other i.MX MX35: add pins definition for UART3 MX35: added ESDC structure to imx-regs
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/mxc_i2c.c41
1 files changed, 30 insertions, 11 deletions
diff --git a/drivers/i2c/mxc_i2c.c b/drivers/i2c/mxc_i2c.c
index 2869d7c..c88ac7c 100644
--- a/drivers/i2c/mxc_i2c.c
+++ b/drivers/i2c/mxc_i2c.c
@@ -37,6 +37,7 @@
#include <asm/arch/clock.h>
#include <asm/arch/imx-regs.h>
+#include <i2c.h>
struct mxc_i2c_regs {
uint32_t iadr;
@@ -73,6 +74,10 @@ struct mxc_i2c_regs {
#define I2C_BASE I2C2_BASE_ADDR
#elif defined(CONFIG_SYS_I2C_MX35_PORT1)
#define I2C_BASE I2C_BASE_ADDR
+#elif defined(CONFIG_SYS_I2C_MX35_PORT2)
+#define I2C_BASE I2C2_BASE_ADDR
+#elif defined(CONFIG_SYS_I2C_MX35_PORT3)
+#define I2C_BASE I2C3_BASE_ADDR
#else
#error "define CONFIG_SYS_I2C_MX<Processor>_PORTx to use the mx I2C driver"
#endif
@@ -95,16 +100,14 @@ static u16 i2c_clk_div[50][2] = {
{ 3072, 0x1E }, { 3840, 0x1F }
};
-static u8 clk_div;
-
/*
* Calculate and set proper clock divider
*/
-static void i2c_imx_set_clk(unsigned int rate)
+static uint8_t i2c_imx_get_clk(unsigned int rate)
{
- struct mxc_i2c_regs *i2c_regs = (struct mxc_i2c_regs *)I2C_BASE;
unsigned int i2c_clk_rate;
unsigned int div;
+ u8 clk_div;
#if defined(CONFIG_MX31)
struct clock_control_regs *sc_regs =
@@ -127,7 +130,7 @@ static void i2c_imx_set_clk(unsigned int rate)
;
/* Store divider value */
- writeb(i2c_clk_div[clk_div][1], &i2c_regs->ifdr);
+ return clk_div;
}
/*
@@ -146,7 +149,13 @@ void i2c_reset(void)
*/
void i2c_init(int speed, int unused)
{
- i2c_imx_set_clk(speed);
+ struct mxc_i2c_regs *i2c_regs = (struct mxc_i2c_regs *)I2C_BASE;
+ u8 clk_idx = i2c_imx_get_clk(speed);
+ u8 idx = i2c_clk_div[clk_idx][1];
+
+ /* Store divider value */
+ writeb(idx, &i2c_regs->ifdr);
+
i2c_reset();
}
@@ -164,6 +173,13 @@ int i2c_set_bus_speed(unsigned int speed)
*/
unsigned int i2c_get_bus_speed(void)
{
+ struct mxc_i2c_regs *i2c_regs = (struct mxc_i2c_regs *)I2C_BASE;
+ u8 clk_idx = readb(&i2c_regs->ifdr);
+ u8 clk_div;
+
+ for (clk_div = 0; i2c_clk_div[clk_div][1] != clk_idx; clk_div++)
+ ;
+
return mxc_get_clock(MXC_IPG_PERCLK) / i2c_clk_div[clk_div][0];
}
@@ -232,8 +248,12 @@ int i2c_imx_start(void)
struct mxc_i2c_regs *i2c_regs = (struct mxc_i2c_regs *)I2C_BASE;
unsigned int temp = 0;
int result;
+ int speed = i2c_get_bus_speed();
+ u8 clk_idx = i2c_imx_get_clk(speed);
+ u8 idx = i2c_clk_div[clk_idx][1];
- writeb(i2c_clk_div[clk_div][1], &i2c_regs->ifdr);
+ /* Store divider value */
+ writeb(idx, &i2c_regs->ifdr);
/* Enable I2C controller */
writeb(0, &i2c_regs->i2sr);
@@ -306,11 +326,10 @@ int i2c_imx_set_chip_addr(uchar chip, int read)
int i2c_imx_set_reg_addr(uint addr, int alen)
{
struct mxc_i2c_regs *i2c_regs = (struct mxc_i2c_regs *)I2C_BASE;
- int ret;
- int i;
+ int ret = 0;
- for (i = 0; i < (8 * alen); i += 8) {
- writeb((addr >> i) & 0xff, &i2c_regs->i2dr);
+ while (alen--) {
+ writeb((addr >> (alen * 8)) & 0xff, &i2c_regs->i2dr);
ret = i2c_imx_trx_complete();
if (ret)