aboutsummaryrefslogtreecommitdiff
path: root/arch/sh/kernel/io_generic.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sh/kernel/io_generic.c')
-rw-r--r--arch/sh/kernel/io_generic.c243
1 files changed, 243 insertions, 0 deletions
diff --git a/arch/sh/kernel/io_generic.c b/arch/sh/kernel/io_generic.c
new file mode 100644
index 000000000000..a911b0149d1f
--- /dev/null
+++ b/arch/sh/kernel/io_generic.c
@@ -0,0 +1,243 @@
+/* $Id: io_generic.c,v 1.2 2003/05/04 19:29:53 lethal Exp $
+ *
+ * linux/arch/sh/kernel/io_generic.c
+ *
+ * Copyright (C) 2000 Niibe Yutaka
+ *
+ * Generic I/O routine. These can be used where a machine specific version
+ * is not required.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ */
+
+#include <asm/io.h>
+#include <asm/machvec.h>
+#include <linux/module.h>
+
+#if defined(CONFIG_CPU_SH3)
+/* I'm not sure SH7709 has this kind of bug */
+#define SH3_PCMCIA_BUG_WORKAROUND 1
+#define DUMMY_READ_AREA6 0xba000000
+#endif
+
+#define PORT2ADDR(x) (sh_mv.mv_isa_port2addr(x))
+
+unsigned long generic_io_base;
+
+static inline void delay(void)
+{
+ ctrl_inw(0xa0000000);
+}
+
+unsigned char generic_inb(unsigned long port)
+{
+ return *(volatile unsigned char*)PORT2ADDR(port);
+}
+
+unsigned short generic_inw(unsigned long port)
+{
+ return *(volatile unsigned short*)PORT2ADDR(port);
+}
+
+unsigned int generic_inl(unsigned long port)
+{
+ return *(volatile unsigned long*)PORT2ADDR(port);
+}
+
+unsigned char generic_inb_p(unsigned long port)
+{
+ unsigned long v = *(volatile unsigned char*)PORT2ADDR(port);
+
+ delay();
+ return v;
+}
+
+unsigned short generic_inw_p(unsigned long port)
+{
+ unsigned long v = *(volatile unsigned short*)PORT2ADDR(port);
+
+ delay();
+ return v;
+}
+
+unsigned int generic_inl_p(unsigned long port)
+{
+ unsigned long v = *(volatile unsigned long*)PORT2ADDR(port);
+
+ delay();
+ return v;
+}
+
+/*
+ * insb/w/l all read a series of bytes/words/longs from a fixed port
+ * address. However as the port address doesn't change we only need to
+ * convert the port address to real address once.
+ */
+
+void generic_insb(unsigned long port, void *buffer, unsigned long count)
+{
+ volatile unsigned char *port_addr;
+ unsigned char *buf=buffer;
+
+ port_addr = (volatile unsigned char *)PORT2ADDR(port);
+
+ while(count--)
+ *buf++ = *port_addr;
+}
+
+void generic_insw(unsigned long port, void *buffer, unsigned long count)
+{
+ volatile unsigned short *port_addr;
+ unsigned short *buf=buffer;
+
+ port_addr = (volatile unsigned short *)PORT2ADDR(port);
+
+ while(count--)
+ *buf++ = *port_addr;
+#ifdef SH3_PCMCIA_BUG_WORKAROUND
+ ctrl_inb (DUMMY_READ_AREA6);
+#endif
+}
+
+void generic_insl(unsigned long port, void *buffer, unsigned long count)
+{
+ volatile unsigned long *port_addr;
+ unsigned long *buf=buffer;
+
+ port_addr = (volatile unsigned long *)PORT2ADDR(port);
+
+ while(count--)
+ *buf++ = *port_addr;
+#ifdef SH3_PCMCIA_BUG_WORKAROUND
+ ctrl_inb (DUMMY_READ_AREA6);
+#endif
+}
+
+void generic_outb(unsigned char b, unsigned long port)
+{
+ *(volatile unsigned char*)PORT2ADDR(port) = b;
+}
+
+void generic_outw(unsigned short b, unsigned long port)
+{
+ *(volatile unsigned short*)PORT2ADDR(port) = b;
+}
+
+void generic_outl(unsigned int b, unsigned long port)
+{
+ *(volatile unsigned long*)PORT2ADDR(port) = b;
+}
+
+void generic_outb_p(unsigned char b, unsigned long port)
+{
+ *(volatile unsigned char*)PORT2ADDR(port) = b;
+ delay();
+}
+
+void generic_outw_p(unsigned short b, unsigned long port)
+{
+ *(volatile unsigned short*)PORT2ADDR(port) = b;
+ delay();
+}
+
+void generic_outl_p(unsigned int b, unsigned long port)
+{
+ *(volatile unsigned long*)PORT2ADDR(port) = b;
+ delay();
+}
+
+/*
+ * outsb/w/l all write a series of bytes/words/longs to a fixed port
+ * address. However as the port address doesn't change we only need to
+ * convert the port address to real address once.
+ */
+
+void generic_outsb(unsigned long port, const void *buffer, unsigned long count)
+{
+ volatile unsigned char *port_addr;
+ const unsigned char *buf=buffer;
+
+ port_addr = (volatile unsigned char *)PORT2ADDR(port);
+
+ while(count--)
+ *port_addr = *buf++;
+}
+
+void generic_outsw(unsigned long port, const void *buffer, unsigned long count)
+{
+ volatile unsigned short *port_addr;
+ const unsigned short *buf=buffer;
+
+ port_addr = (volatile unsigned short *)PORT2ADDR(port);
+
+ while(count--)
+ *port_addr = *buf++;
+
+#ifdef SH3_PCMCIA_BUG_WORKAROUND
+ ctrl_inb (DUMMY_READ_AREA6);
+#endif
+}
+
+void generic_outsl(unsigned long port, const void *buffer, unsigned long count)
+{
+ volatile unsigned long *port_addr;
+ const unsigned long *buf=buffer;
+
+ port_addr = (volatile unsigned long *)PORT2ADDR(port);
+
+ while(count--)
+ *port_addr = *buf++;
+
+#ifdef SH3_PCMCIA_BUG_WORKAROUND
+ ctrl_inb (DUMMY_READ_AREA6);
+#endif
+}
+
+unsigned char generic_readb(unsigned long addr)
+{
+ return *(volatile unsigned char*)addr;
+}
+
+unsigned short generic_readw(unsigned long addr)
+{
+ return *(volatile unsigned short*)addr;
+}
+
+unsigned int generic_readl(unsigned long addr)
+{
+ return *(volatile unsigned long*)addr;
+}
+
+void generic_writeb(unsigned char b, unsigned long addr)
+{
+ *(volatile unsigned char*)addr = b;
+}
+
+void generic_writew(unsigned short b, unsigned long addr)
+{
+ *(volatile unsigned short*)addr = b;
+}
+
+void generic_writel(unsigned int b, unsigned long addr)
+{
+ *(volatile unsigned long*)addr = b;
+}
+
+void * generic_ioremap(unsigned long offset, unsigned long size)
+{
+ return (void *) P2SEGADDR(offset);
+}
+EXPORT_SYMBOL(generic_ioremap);
+
+void generic_iounmap(void *addr)
+{
+}
+EXPORT_SYMBOL(generic_iounmap);
+
+unsigned long generic_isa_port2addr(unsigned long offset)
+{
+ return offset + generic_io_base;
+}