/* * NXP ISP1301 USB transceiver driver * * Copyright (C) 2012 Roland Stigge * * Author: Roland Stigge * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #define DRV_NAME "isp1301" struct isp1301 { struct usb_phy phy; struct mutex mutex; 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 }, { } }; MODULE_DEVICE_TABLE(i2c, 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) { struct isp1301 *isp; struct usb_phy *phy; isp = devm_kzalloc(&client->dev, sizeof(*isp), GFP_KERNEL); if (!isp) return -ENOMEM; isp->client = client; mutex_init(&isp->mutex); phy = &isp->phy; phy->dev = &client->dev; 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); usb_add_phy_dev(phy); isp1301_i2c_client = client; return 0; } static int isp1301_remove(struct i2c_client *client) { struct isp1301 *isp = i2c_get_clientdata(client); usb_remove_phy(&isp->phy); isp1301_i2c_client = NULL; return 0; } static struct i2c_driver isp1301_driver = { .driver = { .name = DRV_NAME, }, .probe = isp1301_probe, .remove = isp1301_remove, .id_table = isp1301_id, }; module_i2c_driver(isp1301_driver); static int match(struct device *dev, void *data) { struct device_node *node = (struct device_node *)data; return (dev->of_node == node) && (dev->driver == &isp1301_driver.driver); } struct i2c_client *isp1301_get_client(struct device_node *node) { if (node) { /* reference of ISP1301 I2C node via DT */ struct device *dev = bus_find_device(&i2c_bus_type, NULL, node, match); if (!dev) return NULL; return to_i2c_client(dev); } else { /* non-DT: only one ISP1301 chip supported */ return isp1301_i2c_client; } } EXPORT_SYMBOL_GPL(isp1301_get_client); MODULE_AUTHOR("Roland Stigge "); MODULE_DESCRIPTION("NXP ISP1301 USB transceiver driver"); MODULE_LICENSE("GPL"); /option>space:mode:
authorBorislav Petkov <bp@suse.de>2017-01-20 21:29:40 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-01-23 09:39:55 +0100
commitc26665ab5c49ad3e142e0f054ca3204f259ba09c (patch)
tree3bab11918e18e9d25ef7544dba05cdf39d1abec5 /drivers/usb/serial/mct_u232.c
parent7a308bb3016f57e5be11a677d15b821536419d36 (diff)
x86/microcode/intel: Drop stashed AP patch pointer optimization
This was meant to save us the scanning of the microcode containter in the initrd since the first AP had already done that but it can also hurt us: Imagine a single hyperthreaded CPU (Intel(R) Atom(TM) CPU N270, for example) which updates the microcode on the BSP but since the microcode engine is shared between the two threads, the update on CPU1 doesn't happen because it has already happened on CPU0 and we don't find a newer microcode revision on CPU1. Which doesn't set the intel_ucode_patch pointer and at initrd jettisoning time we don't save the microcode patch for later application. Now, when we suspend to RAM, the loaded microcode gets cleared so we need to reload but there's no patch saved in the cache. Removing the optimization fixes this issue and all is fine and dandy. Fixes: 06b8534cb728 ("x86/microcode: Rework microcode loading") Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20170120202955.4091-2-bp@alien8.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/usb/serial/mct_u232.c')