honeybuns: add HX3 hub configuration

Send the Cypress HX3 Hub configuration over I2C.

Signed-off-by: Vincent Palatin <vpalatin@chromium.org>

BRANCH=none
BUG=chrome-os-partner:37078
TEST=see the Hub booting in normal mode and enumerating.

Change-Id: I7e32eecd1d69ba0899b726c0405d392602e7d8b7
Reviewed-on: https://chromium-review.googlesource.com/256697
Trybot-Ready: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Scott Collyer <scollyer@chromium.org>
Commit-Queue: Vincent Palatin <vpalatin@chromium.org>

2 files changed, 117 insertions, 1 deletions

diff --git a/board/honeybuns/build.mk b/board/honeybuns/build.mk
index 7058e7ca57..ff4b39a2ce 100644
--- a/board/honeybuns/build.mk
+++ b/board/honeybuns/build.mk
@@ -10,5 +10,5 @@ CHIP:=stm32
 CHIP_FAMILY:=stm32f0
 CHIP_VARIANT:=stm32f07x
 
-board-y=board.o
+board-y=board.o hx3.o
 board-$(CONFIG_USB_POWER_DELIVERY)+=usb_pd_policy.o
diff --git a/board/honeybuns/hx3.c b/board/honeybuns/hx3.c
new file mode 100644
index 0000000000..df9bcfe121
--- /dev/null
+++ b/board/honeybuns/hx3.c
@@ -0,0 +1,116 @@
+/* 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 "timer.h"
+#include "usb.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 void configure_hx3(void)
+{
+	int ret;
+	int remaining, len;
+	uint8_t *data = (uint8_t *)hx3_settings;
+	uint16_t addr = 0x0000;
+
+	/* Reset the bridge to put it back in bootloader mode */
+	gpio_set_level(GPIO_HUB_RESET_L, 0);
+	/* Keep the reset low at least 10ms (same as the RC) */
+	msleep(50);
+	gpio_set_level(GPIO_HUB_RESET_L, 1);
+	msleep(50);
+
+	remaining = sizeof(hx3_settings);
+	while (remaining) {
+		/* do 64-byte Page Write */
+		len = MIN(remaining, 64);
+		i2c_lock(0, 1);
+		/* send Page Write address */
+		ret = i2c_xfer(0, HX3_I2C_ADDR, (uint8_t *)&addr, 2,
+			       NULL, 0, I2C_XFER_START);
+		/* send page data */
+		ret |= i2c_xfer(0, HX3_I2C_ADDR, data, len,
+				NULL, 0, I2C_XFER_STOP);
+		i2c_lock(0, 0);
+		if (ret != EC_SUCCESS)
+			ccprintf("HX3 transfer failed %d\n", ret);
+		remaining -= len;
+		data += len;
+	}
+}
+DECLARE_HOOK(HOOK_INIT, configure_hx3, HOOK_PRIO_DEFAULT);
+
+
+static int command_hx3(int argc, char **argv)
+{
+	configure_hx3();
+
+	return EC_SUCCESS;
+}
+DECLARE_CONSOLE_COMMAND(hx3, command_hx3,
+			"",
+			"Reset and Send HX3 Hub settings over I2C",
+			NULL);