diff options
Diffstat (limited to 'drivers/i2c/mxc_i2c.c')
| -rw-r--r-- | drivers/i2c/mxc_i2c.c | 137 |
1 files changed, 78 insertions, 59 deletions
diff --git a/drivers/i2c/mxc_i2c.c b/drivers/i2c/mxc_i2c.c index 06ba4e3..595019b 100644 --- a/drivers/i2c/mxc_i2c.c +++ b/drivers/i2c/mxc_i2c.c @@ -102,6 +102,28 @@ static u16 i2c_clk_div[50][2] = { }; #endif + +#ifndef CONFIG_SYS_MXC_I2C1_SPEED +#define CONFIG_SYS_MXC_I2C1_SPEED 100000 +#endif +#ifndef CONFIG_SYS_MXC_I2C2_SPEED +#define CONFIG_SYS_MXC_I2C2_SPEED 100000 +#endif +#ifndef CONFIG_SYS_MXC_I2C3_SPEED +#define CONFIG_SYS_MXC_I2C3_SPEED 100000 +#endif + +#ifndef CONFIG_SYS_MXC_I2C1_SLAVE +#define CONFIG_SYS_MXC_I2C1_SLAVE 0 +#endif +#ifndef CONFIG_SYS_MXC_I2C2_SLAVE +#define CONFIG_SYS_MXC_I2C2_SLAVE 0 +#endif +#ifndef CONFIG_SYS_MXC_I2C3_SLAVE +#define CONFIG_SYS_MXC_I2C3_SLAVE 0 +#endif + + /* * Calculate and set proper clock divider */ @@ -153,21 +175,6 @@ static int bus_i2c_set_bus_speed(void *base, int speed) return 0; } -/* - * Get I2C Speed - */ -static unsigned int bus_i2c_get_bus_speed(void *base) -{ - struct mxc_i2c_regs *i2c_regs = (struct mxc_i2c_regs *)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_I2C_CLK) / i2c_clk_div[clk_div][0]; -} - #define ST_BUS_IDLE (0 | (I2SR_IBB << 8)) #define ST_BUS_BUSY (I2SR_IBB | (I2SR_IBB << 8)) #define ST_IIF (I2SR_IIF | (I2SR_IIF << 8)) @@ -410,20 +417,30 @@ struct sram_data { */ static struct sram_data __attribute__((section(".data"))) srdata; -void *get_base(void) -{ -#ifdef CONFIG_SYS_I2C_BASE -#ifdef CONFIG_I2C_MULTI_BUS - void *ret = srdata.i2c_data[srdata.curr_i2c_bus].base; - if (ret) - return ret; -#endif - return (void *)CONFIG_SYS_I2C_BASE; -#elif defined(CONFIG_I2C_MULTI_BUS) - return srdata.i2c_data[srdata.curr_i2c_bus].base; +static void * const i2c_bases[] = { +#if defined(CONFIG_MX25) + (void *)IMX_I2C_BASE, + (void *)IMX_I2C2_BASE, + (void *)IMX_I2C3_BASE +#elif defined(CONFIG_MX27) + (void *)IMX_I2C1_BASE, + (void *)IMX_I2C2_BASE +#elif defined(CONFIG_MX31) || defined(CONFIG_MX35) || \ + defined(CONFIG_MX51) || defined(CONFIG_MX53) || \ + defined(CONFIG_MX6) + (void *)I2C1_BASE_ADDR, + (void *)I2C2_BASE_ADDR, + (void *)I2C3_BASE_ADDR +#elif defined(CONFIG_VF610) + (void *)I2C0_BASE_ADDR #else - return srdata.i2c_data[0].base; +#error "architecture not supported" #endif +}; + +void *i2c_get_base(struct i2c_adapter *adap) +{ + return i2c_bases[adap->hwadapnr]; } static struct i2c_parms *i2c_get_parms(void *base) @@ -448,39 +465,26 @@ static int i2c_idle_bus(void *base) return 0; } -#ifdef CONFIG_I2C_MULTI_BUS -unsigned int i2c_get_bus_num(void) -{ - return srdata.curr_i2c_bus; -} - -int i2c_set_bus_num(unsigned bus_idx) -{ - if (bus_idx >= ARRAY_SIZE(srdata.i2c_data)) - return -1; - if (!srdata.i2c_data[bus_idx].base) - return -1; - srdata.curr_i2c_bus = bus_idx; - return 0; -} -#endif - -int i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len) +static int mxc_i2c_read(struct i2c_adapter *adap, uint8_t chip, + uint addr, int alen, uint8_t *buffer, + int len) { - return bus_i2c_read(get_base(), chip, addr, alen, buf, len); + return bus_i2c_read(i2c_get_base(adap), chip, addr, alen, buffer, len); } -int i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len) +static int mxc_i2c_write(struct i2c_adapter *adap, uint8_t chip, + uint addr, int alen, uint8_t *buffer, + int len) { - return bus_i2c_write(get_base(), chip, addr, alen, buf, len); + return bus_i2c_write(i2c_get_base(adap), chip, addr, alen, buffer, len); } /* * Test if a chip at a given address responds (probe the chip) */ -int i2c_probe(uchar chip) +static int mxc_i2c_probe(struct i2c_adapter *adap, uint8_t chip) { - return bus_i2c_write(get_base(), chip, 0, 0, NULL, 0); + return bus_i2c_write(i2c_get_base(adap), chip, 0, 0, NULL, 0); } void bus_i2c_init(void *base, int speed, int unused, @@ -510,23 +514,38 @@ void bus_i2c_init(void *base, int speed, int unused, /* * Init I2C Bus */ -void i2c_init(int speed, int unused) +static void mxc_i2c_init(struct i2c_adapter *adap, int speed, int slaveaddr) { - bus_i2c_init(get_base(), speed, unused, NULL, NULL); + bus_i2c_init(i2c_get_base(adap), speed, slaveaddr, NULL, NULL); } /* * Set I2C Speed */ -int i2c_set_bus_speed(unsigned int speed) +static uint mxc_i2c_set_bus_speed(struct i2c_adapter *adap, uint speed) { - return bus_i2c_set_bus_speed(get_base(), speed); + return bus_i2c_set_bus_speed(i2c_get_base(adap), speed); } /* - * Get I2C Speed + * Register mxc i2c adapters */ -unsigned int i2c_get_bus_speed(void) -{ - return bus_i2c_get_bus_speed(get_base()); -} +U_BOOT_I2C_ADAP_COMPLETE(mxc0, mxc_i2c_init, mxc_i2c_probe, + mxc_i2c_read, mxc_i2c_write, + mxc_i2c_set_bus_speed, + CONFIG_SYS_MXC_I2C1_SPEED, + CONFIG_SYS_MXC_I2C1_SLAVE, 0) +U_BOOT_I2C_ADAP_COMPLETE(mxc1, mxc_i2c_init, mxc_i2c_probe, + mxc_i2c_read, mxc_i2c_write, + mxc_i2c_set_bus_speed, + CONFIG_SYS_MXC_I2C2_SPEED, + CONFIG_SYS_MXC_I2C2_SLAVE, 1) +#if defined(CONFIG_MX31) || defined(CONFIG_MX35) ||\ + defined(CONFIG_MX51) || defined(CONFIG_MX53) ||\ + defined(CONFIG_MX6) +U_BOOT_I2C_ADAP_COMPLETE(mxc2, mxc_i2c_init, mxc_i2c_probe, + mxc_i2c_read, mxc_i2c_write, + mxc_i2c_set_bus_speed, + CONFIG_SYS_MXC_I2C3_SPEED, + CONFIG_SYS_MXC_I2C3_SLAVE, 2) +#endif |