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/* Copyright 2015 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Cypress HX3 USB Hub configuration */
#include "common.h"
#include "console.h"
#include "ec_version.h"
#include "gpio.h"
#include "hooks.h"
#include "i2c.h"
#include "task.h"
#include "timer.h"
#include "usb_descriptor.h"
#include "util.h"
/* Cypress HX3 I2C address */
#define HX3_I2C_ADDR (0x60 << 1)
/* Full size setting blob */
#define HX3_SETTINGS_SIZE 192
/* USB PID assigned the HX3 USB Hub */
#define USB_PID_HUB 0x5016
/* represent a 16-bit integer as 2 uint8_t in little endian */
#define U16(n) ((n) & 0xff), ((n) >> 8)
/* Cypress HX3 hub settings blob */
const uint8_t hx3_settings[5 + HX3_SETTINGS_SIZE] = {
'C', 'Y', /* Cypress magic signature */
0x30, /* I2C speed : 100kHz */
0xd4, /* Image type: Only settings, no firmware */
HX3_SETTINGS_SIZE, /* 192 bytes payload */
U16(USB_VID_GOOGLE), U16(USB_PID_HUB), /* USB VID:PID 0x18d1:0x5016 */
U16(0x0100), /* bcdDevice 1.00 */
0x00, /* Reserved */
0x0f, /* 4 SuperSpeed ports, no shared link */
0x32, /* bPwrOn2PwrGood : 100 ms */
0xef, /* 4 Downstream ports : DS4 is non-removable (MCU) */
0x10,
0xa0, /* Suspend indicator disabled, Power switch : active HIGH */
0x15, /* BC1.2 + ACA Dock + Ghost charging */
0xf0, /* CDP enabled, DCP disabled */
0x68,
0x00, /* Reserved */
0x08, /* USB String descriptors enabled */
0x00, 0x00,
0x12, 0x00, 0x2c,
0x66, 0x66, /* USB3.0 TX driver de-emphasis */
0x69, 0x29, 0x29, 0x29, 0x29, /* TX amplitude */
0x00, /* Reserved */
U16(USB_PID_HUB), /* USB2.0 PID: 0x5016 */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* Reserved */
0x04, USB_DT_STRING, 0x09, 0x04, /* LangID = 0x0409 US English */
0x18, USB_DT_STRING, /* Manufacturer string descriptor */
0x47, 0x00, 0x6f, 0x00, 0x6f, 0x00, 0x67, 0x00, /* Google Inc. */
0x6c, 0x00, 0x65, 0x00, 0x20, 0x00, 0x49, 0x00, /* as UTF-8 */
0x6e, 0x00, 0x63, 0x00, 0x2e, 0x00,
0x1C, USB_DT_STRING, /* Product string descriptor */
0x48, 0x00, 0x6f, 0x00, 0x6e, 0x00, 0x65, 0x00, /* HoneyBuns Hub */
0x79, 0x00, 0x62, 0x00, 0x75, 0x00, 0x6e, 0x00, /* as UTF-8 */
0x73, 0x00, 0x20, 0x00, 0x48, 0x00, 0x75, 0x00,
0x62, 0x00,
0x02, USB_DT_STRING, /* Serial string descriptor : empty */
/* Free space for more strings */
};
static int hx3_configured;
static int configure_hx3(void)
{
int ret;
int remaining, len;
uint8_t *data = (uint8_t *)hx3_settings;
uint16_t addr = 0x0000;
int success = 1;
remaining = sizeof(hx3_settings);
while (remaining && gpio_get_level(GPIO_HUB_RESET_L)) {
/* do 64-byte Page Write */
len = MIN(remaining, 64);
i2c_lock(I2C_PORT_MASTER, 1);
/* send Page Write address */
ret = i2c_xfer(I2C_PORT_MASTER, HX3_I2C_ADDR,
(uint8_t *)&addr, 2, NULL, 0, I2C_XFER_START);
/* send page data */
ret |= i2c_xfer(I2C_PORT_MASTER, HX3_I2C_ADDR,
data, len, NULL, 0, I2C_XFER_STOP);
i2c_lock(I2C_PORT_MASTER, 0);
if (ret != EC_SUCCESS) {
success = 0;
ccprintf("HX3 transfer failed %d\n", ret);
break;
}
remaining -= len;
data += len;
}
return gpio_get_level(GPIO_HUB_RESET_L) ? success : 0;
}
void hx3_task(void)
{
while (1) {
task_wait_event(-1);
if (!hx3_configured && gpio_get_level(GPIO_HUB_RESET_L)) {
/* wait for the HX3 to come out of reset */
msleep(5);
hx3_configured = configure_hx3();
}
}
}
void hx3_enable(int enable)
{
/* Release reset when the Hub is enabled */
gpio_set_level(GPIO_HUB_RESET_L, !!enable);
/* Trigger I2C configuration if needed */
if (enable)
task_wake(TASK_ID_USBCFG);
else
hx3_configured = 0;
}
static int command_hx3(int argc, char **argv)
{
/* Reset the bridge to put it back in bootloader mode */
hx3_enable(0);
/* Keep the reset low at least 10ms (same as the RC) */
msleep(50);
/* Release reset and wait for the hub to come up */
hx3_enable(1);
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(hx3, command_hx3,
"",
"Reset and Send HX3 Hub settings over I2C");
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