From: Liam Beguin lbeguin@tycoint.com
Adding DM specific wrapper functions and definitions.
Signed-off-by: Liam Beguin lbeguin@tycoint.com Signed-off-by: Sylvain Lemieux slemieux@tycoint.com --- Changes from v1 to v2: * Fixed checkpatch issue.
drivers/i2c/lpc32xx_i2c.c | 91 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+)
diff --git a/drivers/i2c/lpc32xx_i2c.c b/drivers/i2c/lpc32xx_i2c.c index 62d2d7eee5..17e8b744e5 100644 --- a/drivers/i2c/lpc32xx_i2c.c +++ b/drivers/i2c/lpc32xx_i2c.c @@ -15,6 +15,8 @@ #include <i2c.h> #include <linux/errno.h> #include <asm/arch/clk.h> +#include <dm.h> +#include <mapmem.h>
/* * Provide default speed and slave if target did not @@ -47,6 +49,14 @@ struct lpc32xx_i2c_base { u32 stxfl; };
+#ifdef CONFIG_DM_I2C +struct lpc32xx_i2c_dev { + struct lpc32xx_i2c_base *base; + int index; + uint speed; +}; +#endif /* CONFIG_DM_I2C */ + /* TX register fields */ #define LPC32XX_I2C_TX_START 0x00000100 #define LPC32XX_I2C_TX_STOP 0x00000200 @@ -61,11 +71,13 @@ struct lpc32xx_i2c_base { #define LPC32XX_I2C_STAT_NAI 0x00000004 #define LPC32XX_I2C_STAT_TDI 0x00000001
+#ifndef CONFIG_DM_I2C static struct lpc32xx_i2c_base *lpc32xx_i2c[] = { (struct lpc32xx_i2c_base *)I2C1_BASE, (struct lpc32xx_i2c_base *)I2C2_BASE, (struct lpc32xx_i2c_base *)(USB_BASE + 0x300) }; +#endif
/* Set I2C bus speed */ static unsigned int __i2c_set_bus_speed(struct lpc32xx_i2c_base *base, @@ -241,6 +253,7 @@ static int __i2c_write(struct lpc32xx_i2c_base *base, u8 dev, uint addr, return 0; }
+#ifndef CONFIG_DM_I2C static void lpc32xx_i2c_init(struct i2c_adapter *adap, int requested_speed, int slaveadd) { @@ -294,3 +307,80 @@ U_BOOT_I2C_ADAP_COMPLETE(lpc32xx_2, lpc32xx_i2c_init, NULL, 100000, 0, 2) +#else /* CONFIG_DM_I2C */ +static int lpc32xx_i2c_probe(struct udevice *bus) +{ + struct lpc32xx_i2c_dev *dev = dev_get_platdata(bus); + + __i2c_init(dev->base, dev->speed, 0, dev->index); + return 0; +} + +static int lpc32xx_i2c_probe_chip(struct udevice *bus, u32 chip_addr, + u32 chip_flags) +{ + struct lpc32xx_i2c_dev *dev = dev_get_platdata(bus); + return __i2c_probe_chip(dev->base, chip_addr); +} + +static int lpc32xx_i2c_xfer(struct udevice *bus, struct i2c_msg *msg, + int nmsgs) +{ + struct lpc32xx_i2c_dev *dev = dev_get_platdata(bus); + struct i2c_msg *dmsg, *omsg, dummy; + uint i = 0, address = 0; + + memset(&dummy, 0, sizeof(struct i2c_msg)); + + /* We expect either two messages (one with an offset and one with the + * actual data) or one message (just data) + */ + if (nmsgs > 2 || nmsgs == 0) { + debug("%s: Only one or two messages are supported.", __func__); + return -1; + } + + omsg = nmsgs == 1 ? &dummy : msg; + dmsg = nmsgs == 1 ? msg : msg + 1; + + /* the address is expected to be a uint, not a array. */ + address = omsg->buf[0]; + for (i = 1; i < omsg->len; i++) + address = (address << 8) + omsg->buf[i]; + + if (dmsg->flags & I2C_M_RD) + return __i2c_read(dev->base, dmsg->addr, address, + omsg->len, dmsg->buf, dmsg->len); + else + return __i2c_write(dev->base, dmsg->addr, address, + omsg->len, dmsg->buf, dmsg->len); +} + +static int lpc32xx_i2c_set_bus_speed(struct udevice *bus, unsigned int speed) +{ + struct lpc32xx_i2c_dev *dev = dev_get_platdata(bus); + return __i2c_set_bus_speed(dev->base, speed, dev->index); +} + +static int lpc32xx_i2c_reset(struct udevice *bus) +{ + struct lpc32xx_i2c_dev *dev = dev_get_platdata(bus); + + __i2c_init(dev->base, dev->speed, 0, dev->index); + return 0; +} + +static const struct dm_i2c_ops lpc32xx_i2c_ops = { + .xfer = lpc32xx_i2c_xfer, + .probe_chip = lpc32xx_i2c_probe_chip, + .deblock = lpc32xx_i2c_reset, + .set_bus_speed = lpc32xx_i2c_set_bus_speed, +}; + +U_BOOT_DRIVER(i2c_lpc32xx) = { + .id = UCLASS_I2C, + .name = "i2c_lpc32xx", + .probe = lpc32xx_i2c_probe, + .ops = &lpc32xx_i2c_ops, +}; +#endif /* CONFIG_DM_I2C */