diff options
| author | Felipe Balbi <balbi@ti.com> | 2013-03-08 11:25:18 (GMT) |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2013-03-18 09:18:10 (GMT) |
| commit | c38a4f3f508d47e51c3f28e8946b1482ebf47fee (patch) | |
| tree | 73113d484b2fd0faca6306c6036464763cd3b0f5 /drivers/usb/phy/phy-isp1301.c | |
| parent | b774212ea5f13911a5e0211a7088e42dad46b4c8 (diff) | |
| download | linux-c38a4f3f508d47e51c3f28e8946b1482ebf47fee.tar.xz | |
usb: phy: isp1301: implement PHY API
this patch implements ->init() and ->set_vbus()
methods for isp1301 transceiver driver.
Later patches can now come in order to remove
the hackery from ohci-nxp and lpc32xx udc drivers.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/phy/phy-isp1301.c')
| -rw-r--r-- | drivers/usb/phy/phy-isp1301.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/usb/phy/phy-isp1301.c b/drivers/usb/phy/phy-isp1301.c index 5e0f143..225ae6c 100644 --- a/drivers/usb/phy/phy-isp1301.c +++ b/drivers/usb/phy/phy-isp1301.c @@ -14,6 +14,7 @@ #include <linux/mutex.h> #include <linux/i2c.h> #include <linux/usb/phy.h> +#include <linux/usb/isp1301.h> #define DRV_NAME "isp1301" @@ -24,6 +25,8 @@ struct isp1301 { struct i2c_client *client; }; +#define phy_to_isp(p) (container_of((p), struct isp1301, phy)) + static const struct i2c_device_id isp1301_id[] = { { "isp1301", 0 }, { } @@ -31,6 +34,60 @@ static const struct i2c_device_id isp1301_id[] = { static struct i2c_client *isp1301_i2c_client; +static int __isp1301_write(struct isp1301 *isp, u8 reg, u8 value, u8 clear) +{ + return i2c_smbus_write_byte_data(isp->client, reg | clear, value); +} + +static int isp1301_write(struct isp1301 *isp, u8 reg, u8 value) +{ + return __isp1301_write(isp, reg, value, 0); +} + +static int isp1301_clear(struct isp1301 *isp, u8 reg, u8 value) +{ + return __isp1301_write(isp, reg, value, ISP1301_I2C_REG_CLEAR_ADDR); +} + +static int isp1301_phy_init(struct usb_phy *phy) +{ + struct isp1301 *isp = phy_to_isp(phy); + + /* Disable transparent UART mode first */ + isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_UART_EN); + isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_1, ~MC1_SPEED_REG); + isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG); + isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_2, ~0); + isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_2, (MC2_BI_DI | MC2_PSW_EN + | MC2_SPD_SUSP_CTRL)); + + isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, ~0); + isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0); + isp1301_write(isp, ISP1301_I2C_OTG_CONTROL_1, (OTG1_DM_PULLDOWN + | OTG1_DP_PULLDOWN)); + isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, (OTG1_DM_PULLUP + | OTG1_DP_PULLUP)); + + /* mask all interrupts */ + isp1301_clear(isp, ISP1301_I2C_INTERRUPT_LATCH, ~0); + isp1301_clear(isp, ISP1301_I2C_INTERRUPT_FALLING, ~0); + isp1301_clear(isp, ISP1301_I2C_INTERRUPT_RISING, ~0); + + return 0; +} + +static int isp1301_phy_set_vbus(struct usb_phy *phy, int on) +{ + struct isp1301 *isp = phy_to_isp(phy); + + if (on) + isp1301_write(isp, ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DRV); + else + isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DRV); + + return 0; +} + static int isp1301_probe(struct i2c_client *client, const struct i2c_device_id *i2c_id) { @@ -46,6 +103,8 @@ static int isp1301_probe(struct i2c_client *client, phy = &isp->phy; phy->label = DRV_NAME; + phy->init = isp1301_phy_init; + phy->set_vbus = isp1301_phy_set_vbus; phy->type = USB_PHY_TYPE_USB2; i2c_set_clientdata(client, isp); |