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Diffstat (limited to 'arch/arm/plat-mxc/isp1301xc.c')
-rw-r--r--arch/arm/plat-mxc/isp1301xc.c290
1 files changed, 290 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/isp1301xc.c b/arch/arm/plat-mxc/isp1301xc.c
new file mode 100644
index 000000000000..dceea44fd4da
--- /dev/null
+++ b/arch/arm/plat-mxc/isp1301xc.c
@@ -0,0 +1,290 @@
+/*
+ * Copyright 2005-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/usb/fsl_xcvr.h>
+#include <linux/i2c.h>
+
+#include <mach/arc_otg.h>
+
+/*
+ * ISP1301 register addresses,all register of ISP1301
+ * is one-byte length register
+ */
+
+/* ISP1301: I2C device address */
+#define ISP1301_DEV_ADDR 0x2D
+
+/* ISP 1301 register set*/
+#define ISP1301_MODE_REG1_SET 0x04
+#define ISP1301_MODE_REG1_CLR 0x05
+
+#define ISP1301_CTRL_REG1_SET 0x06
+#define ISP1301_CTRL_REG1_CLR 0x07
+
+#define ISP1301_INT_SRC_REG 0x08
+#define ISP1301_INT_LAT_REG_SET 0x0a
+#define ISP1301_INT_LAT_REG_CLR 0x0b
+#define ISP1301_INT_FALSE_REG_SET 0x0c
+#define ISP1301_INT_FALSE_REG_CLR 0x0d
+#define ISP1301_INT_TRUE_REG_SET 0x0e
+#define ISP1301_INT_TRUE_REG_CLR 0x0f
+
+#define ISP1301_CTRL_REG2_SET 0x10
+#define ISP1301_CTRL_REG2_CLR 0x11
+
+#define ISP1301_MODE_REG2_SET 0x12
+#define ISP1301_MODE_REG2_CLR 0x13
+
+#define ISP1301_BCD_DEV_REG0 0x14
+#define ISP1301_BCD_DEV_REG1 0x15
+
+/* OTG Control register bit description */
+#define DP_PULLUP 0x01
+#define DM_PULLUP 0x02
+#define DP_PULLDOWN 0x04
+#define DM_PULLDOWN 0x08
+#define ID_PULLDOWN 0x10
+#define VBUS_DRV 0x20
+#define VBUS_DISCHRG 0x40
+#define VBUS_CHRG 0x80
+
+/* Mode Control 1 register bit description */
+#define SPEED_REG 0x01
+#define SUSPEND_REG 0x02
+#define DAT_SE0 0x04
+#define TRANSP_EN 0x08
+#define BDIS_ACON_EN 0x10
+#define OE_INT_EN 0x20
+#define UART_EN 0x40
+
+/* Mode Control 2 register bit description */
+#define SPD_SUSP_CTRL 0x02
+#define BI_DI 0x04
+
+static int isp1301_attach(struct i2c_adapter *adapter);
+static int isp1301_detach(struct i2c_client *client);
+
+static struct i2c_driver isp1301_i2c_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "isp1301 Client",
+ },
+ .attach_adapter = isp1301_attach,
+ .detach_client = isp1301_detach,
+};
+
+static struct i2c_client isp1301_i2c_client = {
+ .name = "isp1301 I2C dev",
+ .addr = ISP1301_DEV_ADDR,
+ .driver = &isp1301_i2c_driver,
+};
+
+static unsigned short normal_i2c[] = { ISP1301_DEV_ADDR, I2C_CLIENT_END };
+
+/* Magic definition of all other variables and things */
+I2C_CLIENT_INSMOD;
+
+static int isp1301_detect_client(struct i2c_adapter *adapter, int address,
+ int kind)
+{
+ isp1301_i2c_client.adapter = adapter;
+ if (i2c_attach_client(&isp1301_i2c_client)) {
+ isp1301_i2c_client.adapter = NULL;
+ printk(KERN_ERR "isp1301_attach: i2c_attach_client failed\n");
+ return -1;
+ }
+
+ printk(KERN_INFO "isp1301 Detected\n");
+ return 0;
+}
+
+/*!
+ * isp1301 I2C attach function
+ *
+ * @param adapter struct i2c_adapter *
+ * @return Error code indicating success or failure
+ */
+static int isp1301_attach(struct i2c_adapter *adapter)
+{
+ return i2c_probe(adapter, &addr_data, &isp1301_detect_client);
+}
+
+/*!
+ * isp1301 I2C detach function
+ *
+ * @param client struct i2c_client *
+ * @return Error code indicating success or failure
+ */
+static int isp1301_detach(struct i2c_client *client)
+{
+ int err;
+
+ if (!isp1301_i2c_client.adapter)
+ return -1;
+
+ err = i2c_detach_client(&isp1301_i2c_client);
+ isp1301_i2c_client.adapter = NULL;
+
+ return err;
+}
+
+static void isp1301_init(struct fsl_xcvr_ops *this)
+{
+ pr_debug("%s\n", __FUNCTION__);
+
+ i2c_add_driver(&isp1301_i2c_driver);
+}
+
+static void isp1301_uninit(struct fsl_xcvr_ops *this)
+{
+ // DDD do this for host only:
+ /* disable OTG VBUS */
+ i2c_del_driver(&isp1301_i2c_driver);
+}
+
+/* Write ISP1301 register*/
+static inline void isp1301_write_reg(char reg, char data)
+{
+ i2c_smbus_write_byte_data(&isp1301_i2c_client, reg, data);
+}
+
+/* read ISP1301 register*/
+static inline char isp1301_read_reg(char reg)
+{
+ return i2c_smbus_read_byte_data(&isp1301_i2c_client, reg);
+}
+
+/* set ISP1301 as USB host*/
+static inline void isp1301_set_serial_host(void)
+{
+ pr_debug("%s\n", __FUNCTION__);
+
+ isp1301_write_reg(ISP1301_MODE_REG2_CLR, 0xFF);
+#if defined(CONFIG_MXC_USB_SB3) || defined(CONFIG_MXC_USB_DB4)
+ isp1301_write_reg(ISP1301_MODE_REG2_SET, SPD_SUSP_CTRL | BI_DI);
+#else
+ isp1301_write_reg(ISP1301_MODE_REG2_SET, SPD_SUSP_CTRL);
+#endif
+
+ isp1301_write_reg(ISP1301_MODE_REG1_CLR, 0xFF);
+#if defined(CONFIG_MXC_USB_SB3) || defined(CONFIG_MXC_USB_SU6)
+ isp1301_write_reg(ISP1301_MODE_REG1_SET, DAT_SE0 | SPEED_REG);
+#else
+ isp1301_write_reg(ISP1301_MODE_REG1_SET, SPEED_REG);
+#endif
+
+ /* configure transceiver for host mode */
+ isp1301_write_reg(ISP1301_CTRL_REG1_SET,
+ (VBUS_DRV | DP_PULLDOWN | DM_PULLDOWN));
+}
+
+/* set ISP1301 as USB device */
+static inline void isp1301_set_serial_dev(void)
+{
+ pr_debug("%s\n", __FUNCTION__);
+
+ isp1301_write_reg(ISP1301_MODE_REG2_CLR, 0xFF);
+#if defined(CONFIG_MXC_USB_SB3) || defined(CONFIG_MXC_USB_DB4)
+ isp1301_write_reg(ISP1301_MODE_REG2_SET, SPD_SUSP_CTRL | BI_DI);
+#else
+ isp1301_write_reg(ISP1301_MODE_REG2_SET, SPD_SUSP_CTRL);
+#endif
+
+ isp1301_write_reg(ISP1301_MODE_REG1_CLR, 0xFF);
+#if defined(CONFIG_MXC_USB_SB3) || defined(CONFIG_MXC_USB_SU6)
+ isp1301_write_reg(ISP1301_MODE_REG1_SET, DAT_SE0 | SPEED_REG);
+#else
+ isp1301_write_reg(ISP1301_MODE_REG1_SET, SPEED_REG);
+#endif
+
+ /* FS mode, DP pull down, DM pull down */
+ isp1301_write_reg(ISP1301_CTRL_REG1_SET,
+ (DP_PULLDOWN | DM_PULLDOWN | DP_PULLUP));
+}
+
+static void isp1301_set_vbus_power(struct fsl_xcvr_ops *this,
+ struct fsl_usb2_platform_data *pdata, int on)
+{
+ pr_debug("%s(on=%d)\n", __FUNCTION__, on);
+ if (on) {
+ /* disable D+ pull-up */
+ isp1301_write_reg(ISP1301_CTRL_REG1_CLR, DP_PULLUP);
+ /* enable D+ pull-down */
+ isp1301_write_reg(ISP1301_CTRL_REG1_SET, DP_PULLDOWN);
+ /* turn on Vbus */
+ isp1301_write_reg(ISP1301_CTRL_REG1_SET, VBUS_DRV);
+ } else {
+ /* D+ pull up, D- pull down */
+ isp1301_write_reg(ISP1301_CTRL_REG1_SET,
+ (DP_PULLUP | DM_PULLDOWN));
+ /* disable D- pull up, disable D+ pull down */
+ isp1301_write_reg(ISP1301_CTRL_REG1_CLR,
+ (DM_PULLUP | DP_PULLDOWN));
+ }
+}
+
+/*
+ * Enable or disable the D+ pullup.
+ */
+static void isp1301_pullup(int on)
+{
+ pr_debug("%s(%d)\n", __func__, on);
+
+ if (on)
+ isp1301_write_reg(ISP1301_CTRL_REG1_SET, DP_PULLUP);
+ else
+ isp1301_write_reg(ISP1301_CTRL_REG1_CLR, DP_PULLUP);
+}
+
+static struct fsl_xcvr_ops isp1301_ops_otg = {
+ .name = "isp1301",
+ .xcvr_type = PORTSC_PTS_SERIAL,
+ .init = isp1301_init,
+ .uninit = isp1301_uninit,
+ .set_host = isp1301_set_serial_host,
+ .set_device = isp1301_set_serial_dev,
+ .set_vbus_power = isp1301_set_vbus_power,
+ .pullup = isp1301_pullup,
+};
+
+extern void fsl_usb_xcvr_register(struct fsl_xcvr_ops *xcvr_ops);
+
+static int __init isp1301xc_init(void)
+{
+ pr_debug("%s\n", __FUNCTION__);
+
+ fsl_usb_xcvr_register(&isp1301_ops_otg);
+
+ return 0;
+}
+
+extern void fsl_usb_xcvr_unregister(struct fsl_xcvr_ops *xcvr_ops);
+
+static void __exit isp1301xc_exit(void)
+{
+ fsl_usb_xcvr_unregister(&isp1301_ops_otg);
+}
+
+module_init(isp1301xc_init);
+module_exit(isp1301xc_exit);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("isp1301");
+MODULE_LICENSE("GPL");