New repo setup

2024-05-28 14:26:46 -05:00
commit 9ee197f57b
97 changed files with 11047 additions and 0 deletions
--- a/src/devices/disk_driver.h
+++ b/src/devices/disk_driver.h
@@ -0,0 +1,108 @@
+#ifndef KERNEL_DISK_DRIVER_H
+#define KERNEL_DISK_DRIVER_H
+
+typedef unsigned char byte;
+
+class disk_driver {
+   public:
+    enum Status : int {
+        OK      = 0,
+        ERROR   = 1,
+        TIMEOUT = 2
+    };
+
+    disk_driver();
+    disk_driver(unsigned int emmc_registers_base_address);
+    ~disk_driver();
+
+    int read(unsigned int sector_offset, byte*& buffer);
+    int write(unsigned int sector_offset, const byte*& buffer);
+
+   private:
+    enum Register : int {
+        ARG2           = 0,
+        BLKSIZECNT     = 1,
+        ARG1           = 2,
+        CMDTM          = 3,
+        RESP0          = 4,
+        RESP1          = 5,
+        RESP2          = 6,
+        RESP3          = 7,
+        DATA           = 8,
+        STATUS         = 9,
+        CONTROL0       = 10,
+        CONTROL1       = 11,
+        INTERRUPT      = 12,
+        IRPT_MASK      = 13,
+        IRPT_EN        = 14,
+        CONTROL2       = 15,
+        FORCE_IRPT     = 16,
+        BOOT_TIMEOUT   = 17,
+        DBG_SEL        = 18,
+        EXRDFIFO_CFG   = 19,
+        EXRDFIFO_EN    = 20,
+        TUNE_STEP      = 21,
+        TUNE_STEPS_STD = 22,
+        TUNE_STEPS_DDR = 23,
+        SPI_INT_SPT    = 24,
+        SLOTISR_VER    = 25
+    };
+
+    enum STATUS_MASK : unsigned int {
+        READ_AVAILABLE  = 0x00000800,
+        WRITE_AVAILABLE = 0x00000400,
+        DATA_INHIBIT    = 0x00000002,
+        CMD_INHIBIT     = 0x00000001
+    };
+
+    enum INTERRUPT_MASK : unsigned int {
+        ERROR        = 0x017E8000,
+        DATA_TIMEOUT = 0x00100000,
+        CMD_TIMEOUT  = 0x00010000,
+        READ_READY   = 0x00000020,
+        WRITE_READY  = 0x00000010,
+        DATA_DONE    = 0x00000002,
+        CMD_DONE     = 0x00000001
+    };
+
+    enum COMMAND_MASK : unsigned int {
+        ERROR         = 0xfff9c004,
+        NEED_APP      = 0x80000000,
+        GO_IDLE       = 0x00000000,
+        ALL_SEND_CID  = 0x02010000,
+        SEND_REL_ADDR = 0x03020000,
+        CARD_SELECT   = 0x07030000,
+        SEND_IF_COND  = 0x08020000,
+        STOP_TRANS    = 0x0C030000,
+        READ_SINGLE   = 0x11220010,
+        READ_MULTI    = 0x12220032,
+        SET_BLOCKCNT  = 0x17020000,
+        WRITE_SINGLE  = 0x18220000,
+        WRITE_MULTI   = 0x19220022,
+        APP_CMD       = 0x37000000,
+        SET_BUS_WIDTH = (0x06020000 | NEED_APP),
+        SEND_OP_COND  = (0x29020000 | NEED_APP),
+        SEND_SCR      = (0x33220010 | NEED_APP)
+    };
+
+    const unsigned int bytes_per_sector = 512;
+    const unsigned int bytes_per_int    = 4;
+    const unsigned int ints_per_sector  = bytes_per_sector / bytes_per_int;
+
+    unsigned int* volatile registers;
+
+    Status issue_cmd(COMMAND_MASK cmd, unsigned int arg, unsigned int& response);
+
+    Status wait_for_cmd_done();
+    Status wait_for_cmd_rdy();
+    Status wait_for_read_rdy();
+
+    bool any_errors();
+
+    bool can_read();
+    bool can_write();
+    bool can_issue_cmd();
+    bool cmd_done();
+};
+
+#endif