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| author | Terry Lv <r65388@freescale.com> | 2009-09-04 10:07:20 +0800 |
|---|---|---|
| committer | Fred Fan <r01011@freescale.com> | 2009-09-10 17:08:11 +0800 |
| commit | d293115ed756b0b2912eb62ead1ddee647ec2fee (patch) | |
| tree | 512c733f1469ad5d5b863a5dd43110eb78bc2814 /board/freescale/mx51_3stack | |
| parent | e3f5232e3d7461f9ab4fd4277db2bb91fefe12cc (diff) | |
| download | u-boot-imx-d293115ed756b0b2912eb62ead1ddee647ec2fee.zip u-boot-imx-d293115ed756b0b2912eb62ead1ddee647ec2fee.tar.gz u-boot-imx-d293115ed756b0b2912eb62ead1ddee647ec2fee.tar.bz2 | |
ENGR00116243: I2C support for mx51 3ds board.
I2C support for mx51 3ds board.
Signed-off-by: Terry Lv <r65388@freescale.com>
Diffstat (limited to 'board/freescale/mx51_3stack')
| -rw-r--r-- | board/freescale/mx51_3stack/mx51_3stack.c | 62 |
1 files changed, 61 insertions, 1 deletions
diff --git a/board/freescale/mx51_3stack/mx51_3stack.c b/board/freescale/mx51_3stack/mx51_3stack.c index 3d8756e..4ee342e 100644 --- a/board/freescale/mx51_3stack/mx51_3stack.c +++ b/board/freescale/mx51_3stack/mx51_3stack.c @@ -159,6 +159,63 @@ static void setup_expio(void) writew(reg, mx51_io_base_addr + PBC_SW_RESET); } +#ifdef CONFIG_I2C_MXC +static setup_i2c(unsigned int module_base) +{ + unsigned int reg; + + switch (module_base) { + case I2C1_BASE_ADDR: + reg = IOMUXC_BASE_ADDR + 0x210; /* i2c SDA */ + writel(0x11, reg); + reg = IOMUXC_BASE_ADDR + 0x600; + writel(0x1ad, reg); + reg = IOMUXC_BASE_ADDR + 0x9B4; + writel(0x1, reg); + + reg = IOMUXC_BASE_ADDR + 0x224; /* i2c SCL */ + writel(0x11, reg); + reg = IOMUXC_BASE_ADDR + 0x614; + writel(0x1ad, reg); + reg = IOMUXC_BASE_ADDR + 0x9B0; + writel(0x1, reg); + break; + case I2C2_BASE_ADDR: + /* Workaround for Atlas Lite */ + writel(0x0, IOMUXC_BASE_ADDR + 0x3CC); /* i2c SCL */ + writel(0x0, IOMUXC_BASE_ADDR + 0x3D0); /* i2c SDA */ + reg = readl(GPIO1_BASE_ADDR + 0x0); + reg |= 0xC; /* write a 1 on the SCL and SDA lines */ + writel(reg, GPIO1_BASE_ADDR + 0x0); + reg = readl(GPIO1_BASE_ADDR + 0x4); + reg |= 0xC; /* configure GPIO lines as output */ + writel(reg, GPIO1_BASE_ADDR + 0x4); + reg = readl(GPIO1_BASE_ADDR + 0x0); + reg &= ~0x4 ; /* set SCL low for a few milliseconds */ + writel(reg, GPIO1_BASE_ADDR + 0x0); + udelay(20000); + reg |= 0x4; + writel(reg, GPIO1_BASE_ADDR + 0x0); + udelay(10); + reg = readl(GPIO1_BASE_ADDR + 0x4); + reg &= ~0xC; /* configure GPIO lines back as input */ + writel(reg, GPIO1_BASE_ADDR + 0x4); + + writel(0x12, IOMUXC_BASE_ADDR + 0x3CC); /* i2c SCL */ + writel(0x3, IOMUXC_BASE_ADDR + 0x9B8); + writel(0x1ed, IOMUXC_BASE_ADDR + 0x7D4); + + writel(0x12, IOMUXC_BASE_ADDR + 0x3D0); /* i2c SDA */ + writel(0x3, IOMUXC_BASE_ADDR + 0x9BC); + writel(0x1ed, IOMUXC_BASE_ADDR + 0x7D8); + break; + default: + printf("Invalid I2C base: 0x%x\n", module_base); + break; + } +} +#endif + int board_init(void) { int pad; @@ -171,6 +228,9 @@ int board_init(void) setup_uart(); setup_nfc(); setup_expio(); +#ifdef CONFIG_I2C_MXC + setup_i2c(I2C2_BASE_ADDR); +#endif return 0; } @@ -285,7 +345,7 @@ int checkboard(void) default: printf("unknown"); } - printf("]\n"); + printf("]]\n"); return 0; } |