-CSRCS = devtty.c devfd.c devhd.c devlpr.c
-CSRCS += devices.c main.c
-
+CSRCS = ../dev/devsd.c ../dev/mbr.c devfd.c devhd.c devlpr.c
+CSRCS += devices.c main.c devtty.c
+DSRCS = devmegasd.c
ASRCS = msx2.s crt0.s vdp.s
ASRCS += tricks.s commonmem.s bootrom.s
+CROSS_CCOPTS += -I../dev/
+
COBJS = $(CSRCS:.c=.rel)
AOBJS = $(ASRCS:.s=.rel)
-OBJS = $(COBJS) $(AOBJS)
+DOBJS = $(DSRCS:.c=.rel)
+OBJS = $(COBJS) $(AOBJS) $(DOBJS)
JUNK = $(CSRCS:.c=.lst) $(CSRCS:.c=.asm) $(CSRCS:.c=.sym) $(ASRCS:.s=.lst) $(ASRCS:.s=.sym) $(CSRCS:.c=.rst) $(ASRCS:.s=.rst)
all: $(OBJS)
+$(DOBJS): %.rel: %.c
+ $(CROSS_CC) $(CROSS_CCOPTS) -c $<
+
$(COBJS): %.rel: %.c
$(CROSS_CC) $(CROSS_CCOPTS) --codeseg CODE2 -c $<
#include <tty.h>
#include <vt.h>
#include <devtty.h>
+#include <../dev/devsd.h>
+
+extern int megasd_probe();
struct devsw dev_tab[] = /* The device driver switch table */
{
/* 0: /dev/fd Floppy disc block devices */
- { fd_open, no_close, fd_read, fd_write, no_ioctl },
- /* 1: /dev/hd Hard disc block devices (and RAM etc) */
- { hd_open, no_close, hd_read, hd_write, no_ioctl },
+ { no_open, no_close, no_rdwr, no_rdwr, no_ioctl },
+ /* 1: /dev/sd MegaSD Interface */
+ { devsd_open, no_close, devsd_read, devsd_write, no_ioctl },
/* 2: /dev/tty TTY devices */
{ tty_open, tty_close, tty_read, tty_write, vt_ioctl },
/* 3: /dev/lpr Printer devices */
- { lpr_open, no_close, no_rdwr, lpr_write, no_ioctl },
+ { no_open, no_close, no_rdwr, no_rdwr, no_ioctl },
/* 4: /dev/mem etc System devices (one offs) */
{ no_open, no_close, sys_read, sys_write, sys_ioctl },
/* Pack to 7 with nxio if adding private devices and start at 8 */
/* This is a bit uglier than needed but the right hand side is
a constant this way */
if(dev > ((sizeof(dev_tab)/sizeof(struct devsw)) << 8) + 255)
- return false;
+ return false;
else
return true;
}
void device_init(void)
{
+ if (megasd_probe()) {
+ /* probe for megaflash rom sd */
+ devsd_init();
+ }
}
--- /dev/null
+/*-----------------------------------------------------------------------*/
+/* MegaSD driver for MegaFlashROM SCC+ SD */
+/*-----------------------------------------------------------------------*/
+
+#include <kernel.h>
+#include <kdata.h>
+#include <printf.h>
+#include <timer.h>
+#include <stdbool.h>
+#include "config.h"
+
+/*
+ * MegaFlashRom SCC+ SD contains an slot expander with several devices.
+ * The MegaSD interface is in subslot 3 and it contains an ASCII 8Kb mapper
+ * with the sdcard io registers mapped into page 0x40
+ */
+
+#define MSD_MAGIC_ADDR 0x4110
+#define MSD_MAGIC_PAGE 0x0e
+
+#define MSD_PAGE 0x40
+#define MSD_SUBSLOT 0x3
+
+#define MFR_BANKSEL0 0x6000
+#define MFR_BANKSEL1 0x6800
+
+/* bank 0 is in 0x4000-0x5fff and the sd interface mapped io */
+
+#define MSD_RDWR 0x4000
+#define MSD_CS 0x5000
+#define MSD_DEVSEL 0x5800
+
+#define readb(x) *((volatile uint8_t *)x)
+#define writeb(val,x) *((volatile uint8_t *)x) = val
+
+#ifdef DEVICE_SD
+
+extern int mapslot_bank1(uint8_t slot);
+extern uint8_t slotram;
+
+/* slot and subslot containing the sd interface */
+uint8_t slotmfr;
+
+int megasd_probe()
+{
+ uint8_t *sigp = (uint8_t *) MSD_MAGIC_ADDR;
+ uint8_t slot = 1;
+
+ kprintf("MegaSD...");
+
+ for (slot = 1; slot < 3; slot++) {
+ /* try to find MegaFlashRom signature in slots 1 and 2 */
+ slotmfr = 0x80 | MSD_SUBSLOT << 2 | slot;
+ mapslot_bank1(slotmfr);
+ writeb(MSD_MAGIC_PAGE, MFR_BANKSEL0);
+ if (sigp[0] == 'M' && sigp[1] == 'e' && sigp[2] == 'g' && sigp[3] == 'a')
+ goto found;
+ }
+ mapslot_bank1(slotram);
+ kprintf("not found\n");
+ return 0;
+
+found:
+ mapslot_bank1(slotram);
+ kprintf("found in slot %d-3\n", slot);
+ return 1;
+}
+
+void sd_spi_map_interface()
+{
+ mapslot_bank1(slotmfr);
+ writeb(MSD_PAGE, MFR_BANKSEL0);
+}
+
+void sd_spi_unmap_interface()
+{
+ mapslot_bank1(slotram);
+}
+
+void sd_spi_clock(uint8_t drive, bool go_fast)
+{
+ drive; /* not used */
+ go_fast;
+}
+
+void sd_spi_raise_cs(uint8_t drive)
+{
+ drive; /* not used */
+
+ sd_spi_map_interface();
+ writeb(drive, MSD_DEVSEL);
+
+ /* reading from MSD_CS raises CS for all cards */
+
+ readb(MSD_CS);
+
+ sd_spi_unmap_interface();
+}
+
+void sd_spi_lower_cs(uint8_t drive)
+{
+ drive; /* not used */
+
+ /* happens automatically when sending */
+}
+
+void sd_spi_transmit_byte(uint8_t drive, unsigned char byte)
+{
+ drive; /* not used */
+
+ sd_spi_map_interface();
+
+ writeb(byte, MSD_RDWR);
+
+ sd_spi_unmap_interface();
+}
+
+uint8_t sd_spi_receive_byte(uint8_t drive)
+{
+ unsigned char c;
+ drive; /* not used */
+
+ sd_spi_map_interface();
+
+ c = readb(MSD_RDWR);
+
+ sd_spi_unmap_interface();
+
+ return c;
+}
+
+bool sd_spi_receive_block(uint8_t drive, uint8_t *ptr, unsigned int length)
+{
+ drive; /* not used */
+
+ sd_spi_map_interface();
+
+ while(length--) *ptr++ = readb(MSD_RDWR);
+
+ sd_spi_unmap_interface();
+
+ return true;
+}
+
+bool sd_spi_transmit_block(uint8_t drive, uint8_t *ptr, int length)
+{
+ drive; /* not used */
+
+ sd_spi_map_interface();
+
+ while(length--) writeb(*(ptr++), MSD_RDWR);
+
+ sd_spi_unmap_interface();
+
+ return true;
+}
+
+#endif
public / FUZIX.git / commitdiff