Setup project skeleton

4 files changed, 259 insertions, 0 deletions

diff --git a/src/drv/ps1/sio/private_include/drv/ps1/sio/ops.h b/src/drv/ps1/sio/private_include/drv/ps1/sio/ops.h
new file mode 100644
index 0000000..a481fa9
--- /dev/null
+++ b/src/drv/ps1/sio/private_include/drv/ps1/sio/ops.h
@@ -0,0 +1,31 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_SIO_OPS_H
+#define DRV_PS1_SIO_OPS_H
+
+#include <drv/event.h>
+#include <sys/types.h>
+
+int drv_ps1_sio_read(void *buf, size_t n, off_t offset,
+    const struct drv_event_done *done, void *args);
+int drv_ps1_sio_read_nb(void *buf, size_t n, void *args);
+int drv_ps1_sio_write(const void *buf, size_t n,
+    const struct drv_event_done *done, void *args);
+
+#endif
diff --git a/src/drv/ps1/sio/private_include/drv/ps1/sio/regs.h b/src/drv/ps1/sio/private_include/drv/ps1/sio/regs.h
new file mode 100644
index 0000000..16b2bca
--- /dev/null
+++ b/src/drv/ps1/sio/private_include/drv/ps1/sio/regs.h
@@ -0,0 +1,136 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_SIO_REGS_H
+#define DRV_PS1_SIO_REGS_H
+
+#include <stdint.h>
+
+struct sio_tx_data
+{
+    uint32_t value :8, :24;
+};
+
+struct sio_rx_data
+{
+    uint8_t values[4];
+};
+
+union sio_stat
+{
+    struct
+    {
+        uint32_t
+            tx_ready_started :1,
+            rx_fifo_not_empty :1,
+            tx_ready_finished :1,
+            rx_parity_error :1,
+            rx_fifo_overrun :1,
+            rx_bad_stp :1,
+            rx_inverted :1,
+            dsr :1,
+            cts :1,
+            irqreq :1,
+            :1,
+            baudrate :15, :6;
+    } bits;
+
+    uint32_t mask;
+};
+
+union sio_mode
+{
+    struct
+    {
+        uint16_t
+            baudrate_mul :2,
+            len :2,
+            parity_en :1,
+            parity_odd :1,
+            stplen :2,
+            :8;
+    } bits;
+
+    uint16_t mask;
+};
+
+union sio_ctrl
+{
+    struct
+    {
+        uint16_t
+            tx_en :1,
+            dtr :1,
+            rx_en :1,
+            tx_invert :1,
+            ack :1,
+            rts :1,
+            reset :1,
+            :1,
+            rx_int_mode :2,
+            tx_int_en :1,
+            rx_int_en :1,
+            dsr_int_en :1,
+            :3;
+    } bits;
+
+    uint16_t mask;
+};
+
+enum
+{
+    SIO_CTRL_RX_INT_1,
+    SIO_CTRL_RX_INT_2,
+    SIO_CTRL_RX_INT_3,
+    SIO_CTRL_RX_INT_4
+};
+
+enum
+{
+    SIO_MODE_FACTOR_STOP,
+    SIO_MODE_FACTOR_MUL1,
+    SIO_MODE_FACTOR_MUL16,
+    SIO_MODE_FACTOR_MUL64
+};
+
+enum
+{
+    SIO_MODE_LEN_5,
+    SIO_MODE_LEN_6,
+    SIO_MODE_LEN_7,
+    SIO_MODE_LEN_8
+};
+
+enum
+{
+    SIO_MODE_STP_RESERVED,
+    SIO_MODE_STP_1,
+    SIO_MODE_STP_1_5,
+    SIO_MODE_STP_2,
+};
+
+#define SIO_BASE 0x1f801050
+#define SIO_REG(n) (SIO_BASE + n)
+#define SIO_TX_DATA ((volatile struct sio_tx_data *)SIO_REG(0))
+#define SIO_RX_DATA ((const volatile struct sio_rx_data *)SIO_REG(0))
+#define SIO_STAT ((const volatile union sio_stat *)SIO_REG(4))
+#define SIO_MODE ((volatile union sio_mode *)SIO_REG(8))
+#define SIO_CTRL ((volatile union sio_ctrl *)SIO_REG(10))
+#define SIO_BAUD (*(volatile uint16_t *)SIO_REG(14))
+
+#endif
diff --git a/src/drv/ps1/sio/private_include/drv/ps1/sio/routines.h b/src/drv/ps1/sio/private_include/drv/ps1/sio/routines.h
new file mode 100644
index 0000000..f5b97da
--- /dev/null
+++ b/src/drv/ps1/sio/private_include/drv/ps1/sio/routines.h
@@ -0,0 +1,27 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_SIO_ROUTINES_H
+#define DRV_PS1_SIO_ROUTINES_H
+
+#include <drv/ps1/sio/types.h>
+
+int drv_ps1_sio_irq(void);
+int drv_ps1_sio_next(struct sio_fifo *f);
+
+#endif
diff --git a/src/drv/ps1/sio/private_include/drv/ps1/sio/types.h b/src/drv/ps1/sio/private_include/drv/ps1/sio/types.h
new file mode 100644
index 0000000..87dd412
--- /dev/null
+++ b/src/drv/ps1/sio/private_include/drv/ps1/sio/types.h
@@ -0,0 +1,65 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_SIO_TYPES_H
+#define DRV_PS1_SIO_TYPES_H
+
+#include <drv/event.h>
+#include <stdbool.h>
+
+struct sio_req
+{
+    union
+    {
+        struct sio_req_r
+        {
+            void *buf;
+            size_t n;
+        } r;
+
+        struct sio_req_w
+        {
+            const void *buf;
+            size_t n;
+        } w;
+    } u;
+
+    int (*f)(void);
+    struct drv_event_done done;
+    struct sio_req *next;
+};
+
+struct sio_fifo
+{
+    char buf[192];
+    size_t proc, pend;
+    struct sio_req *head, *tail;
+    int (*next)(void);
+};
+
+struct drv_ps1_sio
+{
+    bool init;
+    int event;
+    struct sio_fifo rx, tx;
+    struct drv_event ev;
+};
+
+extern struct drv_ps1_sio drv_ps1_sio;
+
+#endif