1 files changed, 79 insertions, 0 deletions
diff --git a/board/zinger/usb_pd_config.h b/board/zinger/usb_pd_config.h
new file mode 100644
index 0000000000..0900f51a05
--- /dev/null
+++ b/board/zinger/usb_pd_config.h
@@ -0,0 +1,79 @@
+/* Copyright (c) 2014 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.
+ */
+
+/* USB Power delivery board configuration */
+
+#ifndef __USB_PD_CONFIG_H
+#define __USB_PD_CONFIG_H
+
+/* Timer selection for baseband PD communication */
+#define TIM_CLOCK_PD_TX 14
+#define TIM_CLOCK_PD_RX  3
+
+/* use the hardware accelerator for CRC */
+#define CONFIG_HW_CRC
+
+/* TX is using SPI1 on PA4-6 */
+#define SPI_REGS STM32_SPI1_REGS
+#define DMAC_SPI_TX STM32_DMAC_CH3
+
+static inline void spi_enable_clock(void)
+{
+	/* Already done in hardware_init() */
+}
+
+/* RX is on TIM3 CH1 connected to TIM3 CH2 pin (PA7, not internal COMP) */
+#define DMAC_TIM_RX STM32_DMAC_CH4
+#define TIM_CCR_IDX 1
+/* connect TIM3 CH1 to TIM3_CH2 input */
+#define TIM_CCR_CS  2
+#define EXTI_COMP 7
+#define IRQ_COMP STM32_IRQ_EXTI4_15
+/* the RX is inverted, triggers on rising edge */
+#define EXTI_XTSR STM32_EXTI_RTSR
+
+/* Clock divider for RX edges timings (2.4Mhz counter from 48Mhz clock) */
+#define RX_CLOCK_DIV (20 - 1)
+
+/* the pins used for communication need to be hi-speed */
+static inline void pd_set_pins_speed(void)
+{
+	/* Already done in hardware_init() */
+}
+
+/* Drive the CC line from the TX block */
+static inline void pd_tx_enable(void)
+{
+	/* Drive TX GND on PA4 */
+	STM32_GPIO_BSRR(GPIO_A) = 1 << (4 + 16 /* Reset */);
+	/* Drive SPI MISO on PA6 by putting it in AF mode  */
+	STM32_GPIO_MODER(GPIO_A) |= 0x2 << (2*6);
+}
+
+/* Put the TX driver in Hi-Z state */
+static inline void pd_tx_disable(void)
+{
+	/* Put TX GND (PA4) in Hi-Z state */
+	STM32_GPIO_BSRR(GPIO_A) = 1 << 4 /* Set */;
+	/* Put SPI MISO (PA6) in Hi-Z by putting it in input mode  */
+	STM32_GPIO_MODER(GPIO_A) &= ~(0x3 << (2*6));
+}
+
+/* Initialize pins used for TX and put them in Hi-Z */
+static inline void pd_tx_init(void)
+{
+	/* Already done in hardware_init() */
+}
+
+/* 3.0A DFP : no-connect voltage is 2.45V */
+#define PD_SRC_VNC (2450 /*mV*/ * 4096 / 3300/* 12-bit ADC with 3.3V range */)
+
+/* we are a power supply, boot as a power source waiting for a sink */
+#define PD_DEFAULT_STATE PD_STATE_SRC_DISCONNECTED
+
+/* delay necessary for the voltage transition on the power supply */
+#define PD_POWER_SUPPLY_TRANSITION_DELAY 50000 /* us */
+
+#endif /* __USB_PD_CONFIG_H */