Initial USB2422 driver (qmk#14835)

drivers/usb2422.h

@@ -0,0 +1,59 @@
+/* Copyright 2021 QMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include <stdbool.h>
+
+#ifndef USB2422_ADDRESS
+#    define USB2422_ADDRESS 0x58
+#endif
+
+#ifndef USB2422_VENDOR_ID
+#    define USB2422_VENDOR_ID 0xFEED
+#endif
+#ifndef USB2422_PRODUCT_ID
+#    define USB2422_PRODUCT_ID 0x0001
+#endif
+#ifndef USB2422_DEVICE_VER
+#    define USB2422_DEVICE_VER 0x0001
+#endif
+
+#ifndef USB2422_MANUFACTURER
+#    define USB2422_MANUFACTURER "QMK"
+#endif
+#ifndef USB2422_PRODUCT
+#    define USB2422_PRODUCT "QMK Hub"
+#endif
+
+/** \brief Initialises the dependent subsystems */
+void USB2422_init(void);
+
+/** \brief Push configuration to the USB2422 device */
+void USB2422_configure(void);
+
+/** \brief Reset the chip (RESET_N)
+ *
+ * NOTE:
+ * Depends on a valid USB2422_RESET_PIN configuration
+ */
+void USB2422_reset(void);
+
+/** \brief Indicates the USB state of the hub (SUSP_IND)
+ *
+ * NOTE:
+ * Depends on a valid USB2422_ACTIVE_PIN configuration
+ */
+bool USB2422_active(void);

tmk_core/protocol/arm_atsam.mk

@@ -20,10 +20,12 @@ SRC += $(ARM_ATSAM_DIR)/usb/udi_hid.c
 SRC += $(ARM_ATSAM_DIR)/usb/udi_hid_kbd.c
 SRC += $(ARM_ATSAM_DIR)/usb/udi_hid_kbd_desc.c
 SRC += $(ARM_ATSAM_DIR)/usb/ui.c
-SRC += $(ARM_ATSAM_DIR)/usb/usb2422.c
 SRC += $(ARM_ATSAM_DIR)/usb/usb.c
 SRC += $(ARM_ATSAM_DIR)/usb/usb_device_udd.c
+SRC += $(ARM_ATSAM_DIR)/usb/usb_hub.c
 SRC += $(ARM_ATSAM_DIR)/usb/usb_util.c
 
+SRC += $(DRIVER_PATH)/usb2422.c
+
 # Search Path
 VPATH += $(TMK_DIR)/$(ARM_ATSAM_DIR)

tmk_core/protocol/arm_atsam/arm_atsam_protocol.h

@@ -29,7 +29,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "i2c_master.h"
 #include "shift_register.h"
 
-#include "./usb/usb2422.h"
+#include "./usb/usb_hub.h"
 
 #ifndef MD_BOOTLOADER
 

tmk_core/protocol/arm_atsam/i2c_master.c

@@ -564,4 +564,23 @@ uint8_t i2c_led_q_run(void) {
 
     return 1;
 }
+
+__attribute__((weak)) void i2c_init(void) {
+    static bool is_initialised = false;
+    if (!is_initialised) {
+        is_initialised = true;
+
+        i2c0_init();
+    }
+}
+
+i2c_status_t i2c_transmit(uint8_t address, const uint8_t *data, uint16_t length, uint16_t timeout) {
+    uint8_t ret                 = i2c0_transmit(address, (uint8_t *)data, length, timeout);
+    SERCOM0->I2CM.CTRLB.bit.CMD = 0x03;
+    while (SERCOM0->I2CM.SYNCBUSY.bit.SYSOP) {
+        DBGC(DC_USB_WRITE2422_BLOCK_SYNC_SYSOP);
+    }
+    return ret ? I2C_STATUS_SUCCESS : I2C_STATUS_ERROR;
+}
+
 #endif  // !defined(MD_BOOTLOADER) && defined(RGB_MATRIX_ENABLE)

tmk_core/protocol/arm_atsam/i2c_master.h

@@ -101,4 +101,13 @@ void    i2c0_init(void);
 uint8_t i2c0_transmit(uint8_t address, uint8_t *data, uint16_t length, uint16_t timeout);
 void    i2c0_stop(void);
 
+// Terrible interface compatiblity...
+#define I2C_STATUS_SUCCESS (0)
+#define I2C_STATUS_ERROR (-1)
+
+typedef int16_t i2c_status_t;
+
+void         i2c_init(void);
+i2c_status_t i2c_transmit(uint8_t address, const uint8_t *data, uint16_t length, uint16_t timeout);
+
 #endif  // _I2C_MASTER_H_

tmk_core/protocol/arm_atsam/main_arm_atsam.c

@@ -296,7 +296,7 @@ int main(void) {
 
     matrix_init();
 
-    USB2422_init();
+    USB_Hub_init();
 
     DBGC(DC_MAIN_UDC_START_BEGIN);
     udc_start();
@@ -306,7 +306,7 @@ int main(void) {
     CDC_init();
     DBGC(DC_MAIN_CDC_INIT_COMPLETE);
 
-    while (USB2422_Port_Detect_Init() == 0) {
+    while (USB_Hub_Port_Detect_Init() == 0) {
     }
 
     DBG_LED_OFF;

tmk_core/protocol/arm_atsam/usb/usb2422.c → tmk_core/protocol/arm_atsam/usb/usb_hub.c

@@ -16,25 +16,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "arm_atsam_protocol.h"
+#include "drivers/usb2422.h"
 #include <string.h>
 
-Usb2422       USB2422_shadow;
-unsigned char i2c0_buf[34];
-
-const uint16_t MFRNAME[] = {'M', 'a', 's', 's', 'd', 'r', 'o', 'p', ' ', 'I', 'n', 'c', '.'};  // Massdrop Inc.
-const uint16_t PRDNAME[] = {'M', 'a', 's', 's', 'd', 'r', 'o', 'p', ' ', 'H', 'u', 'b'};       // Massdrop Hub
-#ifndef MD_BOOTLOADER
-// Serial number reported stops before first found space character or at last found character
-const uint16_t SERNAME[] = {'U', 'n', 'a', 'v', 'a', 'i', 'l', 'a', 'b', 'l', 'e'};  // Unavailable
-#else
-// In production, this field is found, modified, and offset noted as the last 32-bit word in the bootloader space
-// The offset allows the application to use the factory programmed serial (which may differ from the physical serial label)
-// Serial number reported stops before first found space character or when max size is reached
-__attribute__((__aligned__(4))) const uint16_t SERNAME[BOOTLOADER_SERIAL_MAX_SIZE] = {'M', 'D', 'H', 'U', 'B', 'B', 'O', 'O', 'T', 'L', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0'};
-// NOTE: Serial replacer will not write a string longer than given here as a precaution, so give enough
-//      space as needed and adjust BOOTLOADER_SERIAL_MAX_SIZE to match amount given
-#endif  // MD_BOOTLOADER
-
 uint8_t usb_host_port;
 
 #ifndef MD_BOOTLOADER
@@ -47,29 +31,7 @@ uint8_t usb_gcr_auto;
 
 uint16_t adc_extra;
 
-void USB_write2422_block(void) {
-    unsigned char *dest = i2c0_buf;
-    unsigned char *src;
-    unsigned char *base = (unsigned char *)&USB2422_shadow;
-
-    DBGC(DC_USB_WRITE2422_BLOCK_BEGIN);
-
-    for (src = base; src < base + 256; src += 32) {
-        dest[0] = src - base;
-        dest[1] = 32;
-        memcpy(&dest[2], src, 32);
-        i2c0_transmit(USB2422_ADDR, dest, 34, 50000);
-        SERCOM0->I2CM.CTRLB.bit.CMD = 0x03;
-        while (SERCOM0->I2CM.SYNCBUSY.bit.SYSOP) {
-            DBGC(DC_USB_WRITE2422_BLOCK_SYNC_SYSOP);
-        }
-        wait_us(100);
-    }
-
-    DBGC(DC_USB_WRITE2422_BLOCK_COMPLETE);
-}
-
-void USB2422_init(void) {
+void USB_Hub_init(void) {
     Gclk *   pgclk = GCLK;
     Mclk *   pmclk = MCLK;
     Port *   pport = PORT;
@@ -147,9 +109,7 @@ void USB2422_init(void) {
     pusb->DEVICE.QOSCTRL.bit.DQOS = 2;
     pusb->DEVICE.QOSCTRL.bit.CQOS = 2;
 
-    pport->Group[USB2422_HUB_ACTIVE_GROUP].PINCFG[USB2422_HUB_ACTIVE_PIN].bit.INEN = 1;
-
-    i2c0_init();  // IC2 clk must be high at USB2422 reset release time to signal SMB configuration
+    USB2422_init();
 
     sr_exp_data.bit.HUB_CONNECT = 1;  // connect signal
     sr_exp_data.bit.HUB_RESET_N = 1;  // reset high
@@ -181,62 +141,16 @@ void USB_reset(void) {
 }
 
 void USB_configure(void) {
-    Usb2422 *pusb2422 = &USB2422_shadow;
-    memset(pusb2422, 0, sizeof(Usb2422));
-
-    uint16_t *serial_use    = (uint16_t *)SERNAME;                 // Default to use SERNAME from this file
-    uint8_t   serial_length = sizeof(SERNAME) / sizeof(uint16_t);  // Default to use SERNAME from this file
-#ifndef MD_BOOTLOADER
-    uint32_t serial_ptrloc = (uint32_t)&_srom - 4;
-#else                                                      // MD_BOOTLOADER
-    uint32_t serial_ptrloc = (uint32_t)&_erom - 4;
-#endif                                                     // MD_BOOTLOADER
-    uint32_t serial_address = *(uint32_t *)serial_ptrloc;  // Address of bootloader's serial number if available
-
     DBGC(DC_USB_CONFIGURE_BEGIN);
 
-    if (serial_address != 0xFFFFFFFF && serial_address < serial_ptrloc)  // Check for factory programmed serial address
-    {
-        if ((serial_address & 0xFF) % 4 == 0)  // Check alignment
-        {
-            serial_use    = (uint16_t *)(serial_address);
-            serial_length = 0;
-            while ((*(serial_use + serial_length) > 32 && *(serial_use + serial_length) < 127) && serial_length < BOOTLOADER_SERIAL_MAX_SIZE) {
-                serial_length++;
-                DBGC(DC_USB_CONFIGURE_GET_SERIAL);
-            }
-        }
-    }
-
-    // configure Usb2422 registers
-    pusb2422->VID.reg               = 0x04D8;  // from Microchip 4/19/2018
-    pusb2422->PID.reg               = 0xEEC5;  // from Microchip 4/19/2018 = Massdrop, Inc. USB Hub
-    pusb2422->DID.reg               = 0x0101;  // BCD 01.01
-    pusb2422->CFG1.bit.SELF_BUS_PWR = 1;       // self powered for now
-    pusb2422->CFG1.bit.HS_DISABLE   = 1;       // full or high speed
-    // pusb2422->CFG2.bit.COMPOUND = 0; // compound device
-    pusb2422->CFG3.bit.STRING_EN = 1;  // strings enabled
-    // pusb2422->NRD.bit.PORT2_NR = 0; // MCU is non-removable
-    pusb2422->MAXPB.reg = 20;  // 0mA
-    pusb2422->HCMCB.reg = 20;  // 0mA
-    pusb2422->MFRSL.reg = sizeof(MFRNAME) / sizeof(uint16_t);
-    pusb2422->PRDSL.reg = sizeof(PRDNAME) / sizeof(uint16_t);
-    pusb2422->SERSL.reg = serial_length;
-    memcpy(pusb2422->MFRSTR, MFRNAME, sizeof(MFRNAME));
-    memcpy(pusb2422->PRDSTR, PRDNAME, sizeof(PRDNAME));
-    memcpy(pusb2422->SERSTR, serial_use, serial_length * sizeof(uint16_t));
-    // pusb2422->BOOSTUP.bit.BOOST=3;    //upstream port
-    // pusb2422->BOOSTDOWN.bit.BOOST1=0; // extra port
-    // pusb2422->BOOSTDOWN.bit.BOOST2=2; //MCU is close
-    pusb2422->STCD.bit.USB_ATTACH = 1;
-    USB_write2422_block();
+    USB2422_configure();
 
     adc_extra = 0;
 
     DBGC(DC_USB_CONFIGURE_COMPLETE);
 }
 
-uint16_t USB_active(void) { return (PORT->Group[USB2422_HUB_ACTIVE_GROUP].IN.reg & (1 << USB2422_HUB_ACTIVE_PIN)) != 0; }
+uint16_t USB_active(void) { return USB2422_active(); }
 
 void USB_set_host_by_voltage(void) {
     // UP is upstream device (HOST)
@@ -314,7 +228,7 @@ void USB_set_host_by_voltage(void) {
     DBGC(DC_USB_SET_HOST_BY_VOLTAGE_COMPLETE);
 }
 
-uint8_t USB2422_Port_Detect_Init(void) {
+uint8_t USB_Hub_Port_Detect_Init(void) {
     uint32_t port_detect_retry_ms;
     uint32_t tmod;
 

tmk_core/protocol/arm_atsam/usb/usb_hub.h

@@ -0,0 +1,51 @@
+/*
+Copyright 2018 Massdrop Inc.
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _USB2422_H_
+#define _USB2422_H_
+
+#define REV_USB2422 0x100
+
+#define PORT_DETECT_RETRY_INTERVAL 2000
+
+#define USB_EXTRA_ADC_THRESHOLD 900
+
+#define USB_EXTRA_STATE_DISABLED 0
+#define USB_EXTRA_STATE_ENABLED 1
+#define USB_EXTRA_STATE_UNKNOWN 2
+#define USB_EXTRA_STATE_DISABLED_UNTIL_REPLUG 3
+
+#define USB_HOST_PORT_1 0
+#define USB_HOST_PORT_2 1
+#define USB_HOST_PORT_UNKNOWN 2
+
+extern uint8_t usb_host_port;
+extern uint8_t usb_extra_state;
+extern uint8_t usb_extra_manual;
+extern uint8_t usb_gcr_auto;
+
+void     USB_Hub_init(void);
+uint8_t  USB_Hub_Port_Detect_Init(void);
+void     USB_reset(void);
+void     USB_configure(void);
+uint16_t USB_active(void);
+void     USB_set_host_by_voltage(void);
+uint16_t adc_get(uint8_t muxpos);
+void     USB_HandleExtraDevice(void);
+void     USB_ExtraSetState(uint8_t state);
+
+#endif  //_USB2422_H_