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