#if defined(CONFIG_ORION5X)
#include <asm/arch/orion5x.h>
-#elif defined(CONFIG_KIRKWOOD)
-#include <asm/arch/kirkwood.h>
+#elif (defined(CONFIG_KIRKWOOD) || defined(CONFIG_ARMADA_XP))
+#include <asm/arch/soc.h>
+#elif defined(CONFIG_SUNXI)
+#include <asm/arch/i2c.h>
#else
#error Driver mvtwsi not supported by SoC or board
#endif
* TWSI register structure
*/
+#ifdef CONFIG_SUNXI
+
+struct mvtwsi_registers {
+ u32 slave_address;
+ u32 xtnd_slave_addr;
+ u32 data;
+ u32 control;
+ u32 status;
+ u32 baudrate;
+ u32 soft_reset;
+};
+
+#else
+
struct mvtwsi_registers {
u32 slave_address;
u32 data;
u32 soft_reset;
};
+#endif
+
/*
* Control register fields
*/
/*
* Reset controller.
- * Called at end of i2c_init unsuccessful i2c transactions.
* Controller reset also resets the baud rate and slave address, so
- * re-establish them.
+ * they must be re-established afterwards.
*/
-static void twsi_reset(u8 baud_rate, u8 slave_address)
+static void twsi_reset(struct i2c_adapter *adap)
{
/* ensure controller will be enabled by any twsi*() function */
twsi_control_flags = MVTWSI_CONTROL_TWSIEN;
writel(0, &twsi->soft_reset);
/* wait 2 ms -- this is what the Marvell LSP does */
udelay(20000);
- /* set baud rate */
- writel(baud_rate, &twsi->baudrate);
- /* set slave address even though we don't use it */
- writel(slave_address, &twsi->slave_address);
- writel(0, &twsi->xtnd_slave_addr);
- /* assert STOP but don't care for the result */
- (void) twsi_stop(0);
}
/*
* I2C init called by cmd_i2c when doing 'i2c reset'.
* Sets baud to the highest possible value not exceeding requested one.
*/
-void i2c_init(int requested_speed, int slaveadd)
+static unsigned int twsi_i2c_set_bus_speed(struct i2c_adapter *adap,
+ unsigned int requested_speed)
{
- int tmp_speed, highest_speed, n, m;
- int baud = 0x44; /* baudrate at controller reset */
+ unsigned int tmp_speed, highest_speed, n, m;
+ unsigned int baud = 0x44; /* baudrate at controller reset */
/* use actual speed to collect progressively higher values */
highest_speed = 0;
}
}
}
+ writel(baud, &twsi->baudrate);
+ return 0;
+}
+
+static void twsi_i2c_init(struct i2c_adapter *adap, int speed, int slaveadd)
+{
/* reset controller */
- twsi_reset(baud, slaveadd);
+ twsi_reset(adap);
+ /* set speed */
+ twsi_i2c_set_bus_speed(adap, speed);
+ /* set slave address even though we don't use it */
+ writel(slaveadd, &twsi->slave_address);
+ writel(0, &twsi->xtnd_slave_addr);
+ /* assert STOP but don't care for the result */
+ (void) twsi_stop(0);
}
/*
* I2C probe called by cmd_i2c when doing 'i2c probe'.
* Begin read, nak data byte, end.
*/
-int i2c_probe(uchar chip)
+static int twsi_i2c_probe(struct i2c_adapter *adap, uchar chip)
{
u8 dummy_byte;
int status;
* cmd_eeprom, so we have to choose here, and for the moment that'll be
* a repeated start without a preceding stop.
*/
-int i2c_read(u8 dev, uint addr, int alen, u8 *data, int length)
+static int twsi_i2c_read(struct i2c_adapter *adap, uchar chip, uint addr,
+ int alen, uchar *data, int length)
{
int status;
/* begin i2c write to send the address bytes */
- status = i2c_begin(MVTWSI_STATUS_START, (dev << 1));
+ status = i2c_begin(MVTWSI_STATUS_START, (chip << 1));
/* send addr bytes */
while ((status == 0) && alen--)
status = twsi_send(addr >> (8*alen),
/* begin i2c read to receive eeprom data bytes */
if (status == 0)
status = i2c_begin(
- MVTWSI_STATUS_REPEATED_START, (dev << 1) | 1);
+ MVTWSI_STATUS_REPEATED_START, (chip << 1) | 1);
/* prepare ACK if at least one byte must be received */
if (length > 0)
twsi_control_flags |= MVTWSI_CONTROL_ACK;
* I2C write called by cmd_i2c when doing 'i2c write' and by cmd_eeprom.c
* Begin write, send address byte(s), send data bytes, end.
*/
-int i2c_write(u8 dev, uint addr, int alen, u8 *data, int length)
+static int twsi_i2c_write(struct i2c_adapter *adap, uchar chip, uint addr,
+ int alen, uchar *data, int length)
{
int status;
/* begin i2c write to send the eeprom adress bytes then data bytes */
- status = i2c_begin(MVTWSI_STATUS_START, (dev << 1));
+ status = i2c_begin(MVTWSI_STATUS_START, (chip << 1));
/* send addr bytes */
while ((status == 0) && alen--)
status = twsi_send(addr >> (8*alen),
return status;
}
-/*
- * Bus set routine: we only support bus 0.
- */
-int i2c_set_bus_num(unsigned int bus)
-{
- if (bus > 0) {
- return -1;
- }
- return 0;
-}
-
-/*
- * Bus get routine: hard-return bus 0.
- */
-unsigned int i2c_get_bus_num(void)
-{
- return 0;
-}
+U_BOOT_I2C_ADAP_COMPLETE(twsi0, twsi_i2c_init, twsi_i2c_probe,
+ twsi_i2c_read, twsi_i2c_write,
+ twsi_i2c_set_bus_speed,
+ CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE, 0)
projects / karo-tx-uboot.git / blobdiff