341 lines
9.9 KiB
C
341 lines
9.9 KiB
C
/*
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Copyright 2018 Massdrop Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "arm_atsam_protocol.h"
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#include "drivers/usb2422.h"
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#include <string.h>
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uint8_t usb_host_port;
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#ifndef MD_BOOTLOADER
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uint8_t usb_extra_state;
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uint8_t usb_extra_manual;
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uint8_t usb_gcr_auto;
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#endif // MD_BOOTLOADER
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uint16_t adc_extra;
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void USB_Hub_init(void) {
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Gclk * pgclk = GCLK;
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Mclk * pmclk = MCLK;
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Port * pport = PORT;
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Oscctrl *posc = OSCCTRL;
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Usb * pusb = USB;
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DBGC(DC_USB2422_INIT_BEGIN);
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while ((v_5v = adc_get(ADC_5V)) < ADC_5V_START_LEVEL) {
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DBGC(DC_USB2422_INIT_WAIT_5V_LOW);
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}
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// setup peripheral and synchronous bus clocks to USB
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pgclk->PCHCTRL[10].bit.GEN = 0;
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pgclk->PCHCTRL[10].bit.CHEN = 1;
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pmclk->AHBMASK.bit.USB_ = 1;
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pmclk->APBBMASK.bit.USB_ = 1;
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// setup port pins for D-, D+, and SOF_1KHZ
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pport->Group[0].PMUX[12].reg = 0x77; // PA24, PA25, function column H for USB D-, D+
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pport->Group[0].PINCFG[24].bit.PMUXEN = 1;
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pport->Group[0].PINCFG[25].bit.PMUXEN = 1;
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pport->Group[1].PMUX[11].bit.PMUXE = 7; // PB22, function column H for USB SOF_1KHz output
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pport->Group[1].PINCFG[22].bit.PMUXEN = 1;
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// configure and enable DFLL for USB clock recovery mode at 48MHz
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posc->DFLLCTRLA.bit.ENABLE = 0;
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while (posc->DFLLSYNC.bit.ENABLE) {
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DBGC(DC_USB2422_INIT_OSC_SYNC_DISABLING);
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}
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while (posc->DFLLSYNC.bit.DFLLCTRLB) {
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DBGC(DC_USB2422_INIT_OSC_SYNC_DFLLCTRLB_1);
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}
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posc->DFLLCTRLB.bit.USBCRM = 1;
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while (posc->DFLLSYNC.bit.DFLLCTRLB) {
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DBGC(DC_USB2422_INIT_OSC_SYNC_DFLLCTRLB_2);
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}
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posc->DFLLCTRLB.bit.MODE = 1;
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while (posc->DFLLSYNC.bit.DFLLCTRLB) {
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DBGC(DC_USB2422_INIT_OSC_SYNC_DFLLCTRLB_3);
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}
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posc->DFLLCTRLB.bit.QLDIS = 0;
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while (posc->DFLLSYNC.bit.DFLLCTRLB) {
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DBGC(DC_USB2422_INIT_OSC_SYNC_DFLLCTRLB_4);
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}
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posc->DFLLCTRLB.bit.CCDIS = 1;
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posc->DFLLMUL.bit.MUL = 0xBB80; // 4800 x 1KHz
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while (posc->DFLLSYNC.bit.DFLLMUL) {
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DBGC(DC_USB2422_INIT_OSC_SYNC_DFLLMUL);
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}
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posc->DFLLCTRLA.bit.ENABLE = 1;
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while (posc->DFLLSYNC.bit.ENABLE) {
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DBGC(DC_USB2422_INIT_OSC_SYNC_ENABLING);
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}
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pusb->DEVICE.CTRLA.bit.SWRST = 1;
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while (pusb->DEVICE.SYNCBUSY.bit.SWRST) {
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DBGC(DC_USB2422_INIT_USB_SYNC_SWRST);
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}
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while (pusb->DEVICE.CTRLA.bit.SWRST) {
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DBGC(DC_USB2422_INIT_USB_WAIT_SWRST);
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}
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// calibration from factory presets
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pusb->DEVICE.PADCAL.bit.TRANSN = (USB_FUSES_TRANSN_ADDR >> USB_FUSES_TRANSN_Pos) & USB_FUSES_TRANSN_Msk;
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pusb->DEVICE.PADCAL.bit.TRANSP = (USB_FUSES_TRANSP_ADDR >> USB_FUSES_TRANSP_Pos) & USB_FUSES_TRANSP_Msk;
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pusb->DEVICE.PADCAL.bit.TRIM = (USB_FUSES_TRIM_ADDR >> USB_FUSES_TRIM_Pos) & USB_FUSES_TRIM_Msk;
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// device mode, enabled
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pusb->DEVICE.CTRLB.bit.SPDCONF = 0; // full speed
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pusb->DEVICE.CTRLA.bit.MODE = 0;
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pusb->DEVICE.CTRLA.bit.ENABLE = 1;
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while (pusb->DEVICE.SYNCBUSY.bit.ENABLE) {
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DBGC(DC_USB2422_INIT_USB_SYNC_ENABLING);
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}
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pusb->DEVICE.QOSCTRL.bit.DQOS = 2;
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pusb->DEVICE.QOSCTRL.bit.CQOS = 2;
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USB2422_init();
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sr_exp_data.bit.HUB_CONNECT = 1; // connect signal
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sr_exp_data.bit.HUB_RESET_N = 1; // reset high
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SR_EXP_WriteData();
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wait_us(100);
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#ifndef MD_BOOTLOADER
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usb_extra_manual = 0;
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usb_gcr_auto = 1;
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#endif // MD_BOOTLOADER
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DBGC(DC_USB2422_INIT_COMPLETE);
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}
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void USB_reset(void) {
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DBGC(DC_USB_RESET_BEGIN);
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// pulse reset for at least 1 usec
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sr_exp_data.bit.HUB_RESET_N = 0; // reset low
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SR_EXP_WriteData();
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wait_us(2);
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sr_exp_data.bit.HUB_RESET_N = 1; // reset high to run
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SR_EXP_WriteData();
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DBGC(DC_USB_RESET_COMPLETE);
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}
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void USB_configure(void) {
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DBGC(DC_USB_CONFIGURE_BEGIN);
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USB2422_configure();
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adc_extra = 0;
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DBGC(DC_USB_CONFIGURE_COMPLETE);
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}
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uint16_t USB_active(void) { return USB2422_active(); }
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void USB_set_host_by_voltage(void) {
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// UP is upstream device (HOST)
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// DN1 is downstream device (EXTRA)
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// DN2 is keyboard (KEYB)
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DBGC(DC_USB_SET_HOST_BY_VOLTAGE_BEGIN);
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usb_host_port = USB_HOST_PORT_UNKNOWN;
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#ifndef MD_BOOTLOADER
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usb_extra_state = USB_EXTRA_STATE_UNKNOWN;
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#endif // MD_BOOTLOADER
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sr_exp_data.bit.SRC_1 = 1; // USBC-1 available for test
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sr_exp_data.bit.SRC_2 = 1; // USBC-2 available for test
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sr_exp_data.bit.E_UP_N = 1; // HOST disable
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sr_exp_data.bit.E_DN1_N = 1; // EXTRA disable
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sr_exp_data.bit.E_VBUS_1 = 0; // USBC-1 disable full power I/O
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sr_exp_data.bit.E_VBUS_2 = 0; // USBC-2 disable full power I/O
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SR_EXP_WriteData();
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wait_ms(250);
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while ((v_5v = adc_get(ADC_5V)) < ADC_5V_START_LEVEL) {
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DBGC(DC_USB_SET_HOST_5V_LOW_WAITING);
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}
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v_con_1 = adc_get(ADC_CON1);
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v_con_2 = adc_get(ADC_CON2);
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v_con_1_boot = v_con_1;
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v_con_2_boot = v_con_2;
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if (v_con_1 > v_con_2) {
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sr_exp_data.bit.S_UP = 0; // HOST to USBC-1
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sr_exp_data.bit.S_DN1 = 1; // EXTRA to USBC-2
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sr_exp_data.bit.SRC_1 = 1; // HOST on USBC-1
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sr_exp_data.bit.SRC_2 = 0; // EXTRA available on USBC-2
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sr_exp_data.bit.E_VBUS_1 = 1; // USBC-1 enable full power I/O
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sr_exp_data.bit.E_VBUS_2 = 0; // USBC-2 disable full power I/O
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SR_EXP_WriteData();
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sr_exp_data.bit.E_UP_N = 0; // HOST enable
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SR_EXP_WriteData();
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usb_host_port = USB_HOST_PORT_1;
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} else {
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sr_exp_data.bit.S_UP = 1; // EXTRA to USBC-1
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sr_exp_data.bit.S_DN1 = 0; // HOST to USBC-2
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sr_exp_data.bit.SRC_1 = 0; // EXTRA available on USBC-1
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sr_exp_data.bit.SRC_2 = 1; // HOST on USBC-2
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sr_exp_data.bit.E_VBUS_1 = 0; // USBC-1 disable full power I/O
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sr_exp_data.bit.E_VBUS_2 = 1; // USBC-2 enable full power I/O
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SR_EXP_WriteData();
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sr_exp_data.bit.E_UP_N = 0; // HOST enable
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SR_EXP_WriteData();
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usb_host_port = USB_HOST_PORT_2;
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}
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#ifndef MD_BOOTLOADER
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usb_extra_state = USB_EXTRA_STATE_DISABLED;
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#endif // MD_BOOTLOADER
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USB_reset();
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USB_configure();
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DBGC(DC_USB_SET_HOST_BY_VOLTAGE_COMPLETE);
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}
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uint8_t USB_Hub_Port_Detect_Init(void) {
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uint32_t port_detect_retry_ms;
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uint32_t tmod;
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DBGC(DC_PORT_DETECT_INIT_BEGIN);
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USB_set_host_by_voltage();
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port_detect_retry_ms = timer_read64() + PORT_DETECT_RETRY_INTERVAL;
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while (!USB_active()) {
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tmod = timer_read64() % PORT_DETECT_RETRY_INTERVAL;
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if (v_con_1 > v_con_2) // Values updated from USB_set_host_by_voltage();
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{
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// 1 flash for port 1 detected
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if (tmod > 500 && tmod < 600) {
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DBG_LED_ON;
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} else {
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DBG_LED_OFF;
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}
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} else if (v_con_2 > v_con_1) // Values updated from USB_set_host_by_voltage();
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{
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// 2 flash for port 2 detected
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if (tmod > 500 && tmod < 600) {
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DBG_LED_ON;
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} else if (tmod > 700 && tmod < 800) {
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DBG_LED_ON;
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} else {
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DBG_LED_OFF;
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}
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}
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if (timer_read64() > port_detect_retry_ms) {
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DBGC(DC_PORT_DETECT_INIT_FAILED);
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return 0;
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}
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}
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DBGC(DC_PORT_DETECT_INIT_COMPLETE);
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return 1;
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}
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#ifndef MD_BOOTLOADER
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void USB_ExtraSetState(uint8_t state) {
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uint8_t state_save = state;
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if (state == USB_EXTRA_STATE_DISABLED_UNTIL_REPLUG) state = USB_EXTRA_STATE_DISABLED;
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if (usb_host_port == USB_HOST_PORT_1)
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sr_exp_data.bit.E_VBUS_2 = state;
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else if (usb_host_port == USB_HOST_PORT_2)
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sr_exp_data.bit.E_VBUS_1 = state;
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else
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return;
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sr_exp_data.bit.E_DN1_N = !state;
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SR_EXP_WriteData();
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usb_extra_state = state_save;
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if (usb_extra_state == USB_EXTRA_STATE_ENABLED)
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CDC_print("USB: Extra enabled\r\n");
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else if (usb_extra_state == USB_EXTRA_STATE_DISABLED) {
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CDC_print("USB: Extra disabled\r\n");
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# ifdef USE_MASSDROP_CONFIGURATOR
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if (led_animation_breathing) gcr_breathe = gcr_desired;
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# endif
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} else if (usb_extra_state == USB_EXTRA_STATE_DISABLED_UNTIL_REPLUG)
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CDC_print("USB: Extra disabled until replug\r\n");
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else
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CDC_print("USB: Extra state unknown\r\n");
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}
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void USB_HandleExtraDevice(void) {
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uint16_t adcval;
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if (usb_host_port == USB_HOST_PORT_1)
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adcval = adc_get(ADC_CON2);
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else if (usb_host_port == USB_HOST_PORT_2)
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adcval = adc_get(ADC_CON1);
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else
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return;
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adc_extra = adc_extra * 0.9 + adcval * 0.1;
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// Check for a forced disable state (such as overload prevention)
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if (usb_extra_state == USB_EXTRA_STATE_DISABLED_UNTIL_REPLUG) {
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// Detect unplug and reset state to disabled
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if (adc_extra > USB_EXTRA_ADC_THRESHOLD) usb_extra_state = USB_EXTRA_STATE_DISABLED;
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return; // Return even if unplug detected
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}
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if (usb_extra_manual) {
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if (usb_extra_state == USB_EXTRA_STATE_DISABLED) USB_ExtraSetState(USB_EXTRA_STATE_ENABLED);
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return;
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}
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// dpf("a %i %i\r\n",adcval, adc_extra);
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if (usb_extra_state == USB_EXTRA_STATE_DISABLED && adc_extra < USB_EXTRA_ADC_THRESHOLD)
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USB_ExtraSetState(USB_EXTRA_STATE_ENABLED);
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else if (usb_extra_state == USB_EXTRA_STATE_ENABLED && adc_extra > USB_EXTRA_ADC_THRESHOLD)
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USB_ExtraSetState(USB_EXTRA_STATE_DISABLED);
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}
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#endif // MD_BOOTLOADER
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