mirror of
https://github.com/AsahiLinux/m1n1
synced 2024-09-20 13:11:53 +00:00
343 lines
12 KiB
C
343 lines
12 KiB
C
/* SPDX-License-Identifier: MIT */
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#include "usb.h"
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#include "adt.h"
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#include "dart.h"
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#include "i2c.h"
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#include "iodev.h"
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#include "malloc.h"
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#include "pmgr.h"
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#include "tps6598x.h"
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#include "types.h"
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#include "usb_dwc3.h"
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#include "usb_dwc3_regs.h"
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#include "utils.h"
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#include "vsprintf.h"
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struct usb_drd_regs {
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uintptr_t drd_regs;
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uintptr_t drd_regs_unk3;
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uintptr_t atc;
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};
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#if USB_IODEV_COUNT > 100
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#error "USB_IODEV_COUNT is limited to 100 to prevent overflow in ADT path names"
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#endif
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// length of the format string is is used as buffer size
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// limits the USB instance numbers to reasonable 2 digits
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#define FMT_DART_PATH "/arm-io/dart-usb%u"
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#define FMT_DART_MAPPER_PATH "/arm-io/dart-usb%u/mapper-usb%u"
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#define FMT_ATC_PATH "/arm-io/atc-phy%u"
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#define FMT_DRD_PATH "/arm-io/usb-drd%u"
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#define FMT_HPM_PATH "/arm-io/i2c0/hpmBusManager/hpm%u"
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static tps6598x_irq_state_t tps6598x_irq_state[USB_IODEV_COUNT];
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static bool usb_is_initialized = false;
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static dart_dev_t *usb_dart_init(u32 idx)
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{
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int mapper_offset;
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char path[sizeof(FMT_DART_MAPPER_PATH)];
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snprintf(path, sizeof(path), FMT_DART_MAPPER_PATH, idx, idx);
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mapper_offset = adt_path_offset(adt, path);
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if (mapper_offset < 0) {
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// Device not present
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return NULL;
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}
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u32 dart_idx;
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if (ADT_GETPROP(adt, mapper_offset, "reg", &dart_idx) < 0) {
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printf("usb: Error getting DART %s device index/\n", path);
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return NULL;
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}
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snprintf(path, sizeof(path), FMT_DART_PATH, idx);
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return dart_init_adt(path, 1, dart_idx, false);
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}
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static int usb_drd_get_regs(u32 idx, struct usb_drd_regs *regs)
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{
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int adt_drd_path[8];
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int adt_drd_offset;
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int adt_phy_path[8];
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int adt_phy_offset;
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char phy_path[sizeof(FMT_ATC_PATH)];
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char drd_path[sizeof(FMT_DRD_PATH)];
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snprintf(drd_path, sizeof(drd_path), FMT_DRD_PATH, idx);
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adt_drd_offset = adt_path_offset_trace(adt, drd_path, adt_drd_path);
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if (adt_drd_offset < 0) {
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// Nonexistent device
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return -1;
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}
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snprintf(phy_path, sizeof(phy_path), FMT_ATC_PATH, idx);
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adt_phy_offset = adt_path_offset_trace(adt, phy_path, adt_phy_path);
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if (adt_phy_offset < 0) {
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printf("usb: Error getting phy node %s\n", phy_path);
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return -1;
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}
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if (adt_get_reg(adt, adt_phy_path, "reg", 0, ®s->atc, NULL) < 0) {
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printf("usb: Error getting reg with index 0 for %s.\n", phy_path);
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return -1;
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}
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if (adt_get_reg(adt, adt_drd_path, "reg", 0, ®s->drd_regs, NULL) < 0) {
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printf("usb: Error getting reg with index 0 for %s.\n", drd_path);
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return -1;
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}
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if (adt_get_reg(adt, adt_drd_path, "reg", 3, ®s->drd_regs_unk3, NULL) < 0) {
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printf("usb: Error getting reg with index 3 for %s.\n", drd_path);
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return -1;
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}
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return 0;
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}
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int usb_phy_bringup(u32 idx)
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{
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char path[24];
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if (idx >= USB_IODEV_COUNT)
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return -1;
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struct usb_drd_regs usb_regs;
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if (usb_drd_get_regs(idx, &usb_regs) < 0)
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return -1;
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snprintf(path, sizeof(path), FMT_ATC_PATH, idx);
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if (pmgr_adt_power_enable(path) < 0)
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return -1;
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snprintf(path, sizeof(path), FMT_DART_PATH, idx);
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if (pmgr_adt_power_enable(path) < 0)
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return -1;
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snprintf(path, sizeof(path), FMT_DRD_PATH, idx);
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if (pmgr_adt_power_enable(path) < 0)
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return -1;
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write32(usb_regs.atc + 0x08, 0x01c1000f);
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write32(usb_regs.atc + 0x04, 0x00000003);
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write32(usb_regs.atc + 0x04, 0x00000000);
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write32(usb_regs.atc + 0x1c, 0x008c0813);
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write32(usb_regs.atc + 0x00, 0x00000002);
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write32(usb_regs.drd_regs_unk3 + 0x0c, 0x00000002);
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write32(usb_regs.drd_regs_unk3 + 0x0c, 0x00000022);
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write32(usb_regs.drd_regs_unk3 + 0x1c, 0x00000021);
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write32(usb_regs.drd_regs_unk3 + 0x20, 0x00009332);
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return 0;
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}
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dwc3_dev_t *usb_iodev_bringup(u32 idx)
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{
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dart_dev_t *usb_dart = usb_dart_init(idx);
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if (!usb_dart)
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return NULL;
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struct usb_drd_regs usb_reg;
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if (usb_drd_get_regs(idx, &usb_reg) < 0)
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return NULL;
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return usb_dwc3_init(usb_reg.drd_regs, usb_dart);
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}
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#define USB_IODEV_WRAPPER(name, pipe) \
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static ssize_t usb_##name##_can_read(void *dev) \
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{ \
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return usb_dwc3_can_read(dev, pipe); \
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} \
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\
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static bool usb_##name##_can_write(void *dev) \
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{ \
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return usb_dwc3_can_write(dev, pipe); \
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} \
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\
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static ssize_t usb_##name##_read(void *dev, void *buf, size_t count) \
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{ \
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return usb_dwc3_read(dev, pipe, buf, count); \
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} \
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\
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static ssize_t usb_##name##_write(void *dev, const void *buf, size_t count) \
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{ \
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return usb_dwc3_write(dev, pipe, buf, count); \
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} \
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\
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static ssize_t usb_##name##_queue(void *dev, const void *buf, size_t count) \
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{ \
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return usb_dwc3_queue(dev, pipe, buf, count); \
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} \
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\
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static void usb_##name##_handle_events(void *dev) \
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{ \
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usb_dwc3_handle_events(dev); \
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} \
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\
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static void usb_##name##_flush(void *dev) \
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{ \
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usb_dwc3_flush(dev, pipe); \
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}
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USB_IODEV_WRAPPER(0, CDC_ACM_PIPE_0)
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USB_IODEV_WRAPPER(1, CDC_ACM_PIPE_1)
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static struct iodev_ops iodev_usb_ops = {
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.can_read = usb_0_can_read,
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.can_write = usb_0_can_write,
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.read = usb_0_read,
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.write = usb_0_write,
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.queue = usb_0_queue,
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.flush = usb_0_flush,
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.handle_events = usb_0_handle_events,
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};
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static struct iodev_ops iodev_usb_sec_ops = {
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.can_read = usb_1_can_read,
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.can_write = usb_1_can_write,
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.read = usb_1_read,
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.write = usb_1_write,
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.queue = usb_1_queue,
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.flush = usb_1_flush,
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.handle_events = usb_1_handle_events,
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};
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struct iodev iodev_usb_vuart = {
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.ops = &iodev_usb_sec_ops,
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.usage = 0,
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.lock = SPINLOCK_INIT,
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};
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static tps6598x_dev_t *hpm_init(i2c_dev_t *i2c, const char *hpm_path)
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{
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tps6598x_dev_t *tps = tps6598x_init(hpm_path, i2c);
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if (!tps) {
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printf("usb: tps6598x_init failed for %s.\n", hpm_path);
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return NULL;
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}
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if (tps6598x_powerup(tps) < 0) {
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printf("usb: tps6598x_powerup failed for %s.\n", hpm_path);
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tps6598x_shutdown(tps);
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return NULL;
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}
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return tps;
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}
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void usb_init(void)
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{
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char hpm_path[sizeof(FMT_HPM_PATH)];
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if (usb_is_initialized)
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return;
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i2c_dev_t *i2c = i2c_init("/arm-io/i2c0");
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if (!i2c) {
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printf("usb: i2c init failed.\n");
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return;
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}
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for (u32 idx = 0; idx < USB_IODEV_COUNT; ++idx) {
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snprintf(hpm_path, sizeof(hpm_path), FMT_HPM_PATH, idx);
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if (adt_path_offset(adt, hpm_path) < 0)
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continue; // device not present
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tps6598x_dev_t *tps = hpm_init(i2c, hpm_path);
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if (!tps) {
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printf("usb: failed to init hpm%d\n", idx);
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continue;
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}
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if (tps6598x_disable_irqs(tps, &tps6598x_irq_state[idx]))
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printf("usb: unable to disable IRQ masks for hpm%d\n", idx);
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tps6598x_shutdown(tps);
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}
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i2c_shutdown(i2c);
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for (int idx = 0; idx < USB_IODEV_COUNT; ++idx)
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usb_phy_bringup(idx); /* Fails on missing devices, just continue */
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usb_is_initialized = true;
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}
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void usb_hpm_restore_irqs(bool force)
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{
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char hpm_path[sizeof(FMT_HPM_PATH)];
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i2c_dev_t *i2c = i2c_init("/arm-io/i2c0");
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if (!i2c) {
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printf("usb: i2c init failed.\n");
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return;
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}
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for (u32 idx = 0; idx < USB_IODEV_COUNT; ++idx) {
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if (iodev_get_usage(IODEV_USB0 + idx) && !force)
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continue;
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if (tps6598x_irq_state[idx].valid) {
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snprintf(hpm_path, sizeof(hpm_path), FMT_HPM_PATH, idx);
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if (adt_path_offset(adt, hpm_path) < 0)
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continue; // device not present
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tps6598x_dev_t *tps = hpm_init(i2c, hpm_path);
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if (!tps)
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continue;
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if (tps6598x_restore_irqs(tps, &tps6598x_irq_state[idx]))
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printf("usb: unable to restore IRQ masks for hpm%d\n", idx);
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tps6598x_shutdown(tps);
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}
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}
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i2c_shutdown(i2c);
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}
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void usb_iodev_init(void)
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{
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for (int i = 0; i < USB_IODEV_COUNT; i++) {
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dwc3_dev_t *opaque;
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struct iodev *usb_iodev;
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opaque = usb_iodev_bringup(i);
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if (!opaque)
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continue;
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usb_iodev = memalign(SPINLOCK_ALIGN, sizeof(*usb_iodev));
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if (!usb_iodev)
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continue;
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usb_iodev->ops = &iodev_usb_ops;
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usb_iodev->opaque = opaque;
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usb_iodev->usage = USAGE_CONSOLE | USAGE_UARTPROXY;
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spin_init(&usb_iodev->lock);
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iodev_register_device(IODEV_USB0 + i, usb_iodev);
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printf("USB%d: initialized at %p\n", i, opaque);
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}
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}
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void usb_iodev_shutdown(void)
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{
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for (int i = 0; i < USB_IODEV_COUNT; i++) {
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struct iodev *usb_iodev = iodev_unregister_device(IODEV_USB0 + i);
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if (!usb_iodev)
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continue;
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printf("USB%d: shutdown\n", i);
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usb_dwc3_shutdown(usb_iodev->opaque);
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free(usb_iodev);
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}
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}
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void usb_iodev_vuart_setup(iodev_id_t iodev)
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{
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if (iodev < IODEV_USB0 || iodev >= IODEV_USB0 + USB_IODEV_COUNT)
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return;
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iodev_usb_vuart.opaque = iodev_get_opaque(iodev);
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}
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