[PATCH 01/12] m68k/atari: ROM port ISA adapter support

Michael Schmitz
2013-04-06T00:27:06Z

From: Michael Schmitz <schmitz@opal.biophys.uni-duesseldorf.de>

Atari ROM port ISA adapter support for EtherNEC and NetUSBee adapters

16 bit access for ROM port adapters follows debugging and
clarification by David Galvez <dgalvez75@gmail.com>. The NetUSBee
ISP1160 USB chip uses these macros.

Signed-off-by: Michael Schmitz <schmitz@debian.org>
---
arch/m68k/Kconfig.bus | 10 +++
arch/m68k/include/asm/io_mm.h | 136 ++++++++++++++++++++++++++++++++++++++--
arch/m68k/include/asm/raw_io.h | 109 +++++++++++++++++++++++++++++++-
arch/m68k/kernel/setup_mm.c | 6 ++
4 files changed, 254 insertions(+), 7 deletions(-)

diff --git a/arch/m68k/Kconfig.bus b/arch/m68k/Kconfig.bus
index 93ef034..675b087 100644
--- a/arch/m68k/Kconfig.bus
+++ b/arch/m68k/Kconfig.bus
@@ -45,6 +45,16 @@ config ISA
(MCA) or VESA. ISA is an older system, now being displaced by PCI;
newer boards don't support it. If you have ISA, say Y, otherwise N.

+config ATARI_ROM_ISA
+ bool "Atari ROM port ISA adapter support"
+ depends on ATARI
+ help
+ This option enables support for the ROM port ISA adapter used to
+ operate ISA cards on Atari. Only 8 bit cards are supported, and
+ no interrupt lines are connected.
+ The only driver currently using this adapter is the EtherNEC
+ driver for RTL8019AS based NE2000 compatible network cards.
+
config GENERIC_ISA_DMA
def_bool ISA

diff --git a/arch/m68k/include/asm/io_mm.h b/arch/m68k/include/asm/io_mm.h
index a6686d2..ffdf54f 100644
--- a/arch/m68k/include/asm/io_mm.h
+++ b/arch/m68k/include/asm/io_mm.h
@@ -63,6 +63,23 @@
#endif
#endif /* AMIGA_PCMCIA */

+#ifdef CONFIG_ATARI_ROM_ISA
+
+#define enec_isa_read_base 0xfffa0000
+#define enec_isa_write_base 0xfffb0000
+
+#define ENEC_ISA_IO_B(ioaddr) (enec_isa_read_base+((((unsigned long)(ioaddr))&0x7F)<<9))
+#define ENEC_ISA_IO_W(ioaddr) (enec_isa_read_base+((((unsigned long)(ioaddr))&0x7F)<<9))
+#define ENEC_ISA_MEM_B(madr) (enec_isa_read_base+((((unsigned long)(madr))&0x7F)<<9))
+#define ENEC_ISA_MEM_W(madr) (enec_isa_read_base+((((unsigned long)(madr))&0x7F)<<9))
+
+#ifndef MULTI_ISA
+#define MULTI_ISA 0
+#else
+#undef MULTI_ISA
+#define MULTI_ISA 1
+#endif
+#endif /* ATARI_ROM_ISA */

#if defined(CONFIG_PCI) && defined(CONFIG_COLDFIRE)
@@ -111,14 +128,15 @@ void mcf_pci_outsl(u32 addr, const u32 *buf, u32 len);
#define readw(addr) in_le16(addr)
#define writew(v, addr) out_le16((addr), (v))

-#elif defined(CONFIG_ISA)
+#elif defined(CONFIG_ISA) || defined(CONFIG_ATARI_ROM_ISA)

#if MULTI_ISA == 0
#undef MULTI_ISA
#endif

-#define ISA_TYPE_Q40 (1)
-#define ISA_TYPE_AG (2)
+#define ISA_TYPE_Q40 (1)
+#define ISA_TYPE_AG (2)
+#define ISA_TYPE_ENEC (3)

#if defined(CONFIG_Q40) && !defined(MULTI_ISA)
#define ISA_TYPE ISA_TYPE_Q40
@@ -128,6 +146,10 @@ void mcf_pci_outsl(u32 addr, const u32 *buf, u32 len);
#define ISA_TYPE ISA_TYPE_AG
#define ISA_SEX 1
#endif
+#if defined(CONFIG_ATARI_ROM_ISA) && !defined(MULTI_ISA)
+#define ISA_TYPE ISA_TYPE_ENEC
+#define ISA_SEX 0
+#endif

#ifdef MULTI_ISA
extern int isa_type;
@@ -152,6 +174,9 @@ static inline u8 __iomem *isa_itb(unsigned long addr)
#ifdef CONFIG_AMIGA_PCMCIA
case ISA_TYPE_AG: return (u8 __iomem *)AG_ISA_IO_B(addr);
#endif
+#ifdef CONFIG_ATARI_ROM_ISA
+ case ISA_TYPE_ENEC: return (u8 __iomem *)ENEC_ISA_IO_B(addr);
+#endif
default: return NULL; /* avoid warnings, just in case */
}
}
@@ -165,6 +190,9 @@ static inline u16 __iomem *isa_itw(unsigned long addr)
#ifdef CONFIG_AMIGA_PCMCIA
case ISA_TYPE_AG: return (u16 __iomem *)AG_ISA_IO_W(addr);
#endif
+#ifdef CONFIG_ATARI_ROM_ISA
+ case ISA_TYPE_ENEC: return (u16 __iomem *)ENEC_ISA_IO_W(addr);
+#endif
default: return NULL; /* avoid warnings, just in case */
}
}
@@ -188,6 +216,9 @@ static inline u8 __iomem *isa_mtb(unsigned long addr)
#ifdef CONFIG_AMIGA_PCMCIA
case ISA_TYPE_AG: return (u8 __iomem *)addr;
#endif
+#ifdef CONFIG_ATARI_ROM_ISA
+ case ISA_TYPE_ENEC: return (u8 __iomem *)ENEC_ISA_MEM_B(addr);
+#endif
default: return NULL; /* avoid warnings, just in case */
}
}
@@ -201,6 +232,9 @@ static inline u16 __iomem *isa_mtw(unsigned long addr)
#ifdef CONFIG_AMIGA_PCMCIA
case ISA_TYPE_AG: return (u16 __iomem *)addr;
#endif
+#ifdef CONFIG_ATARI_ROM_ISA
+ case ISA_TYPE_ENEC: return (u16 __iomem *)ENEC_ISA_MEM_W(addr);
+#endif
default: return NULL; /* avoid warnings, just in case */
}
}
@@ -222,6 +256,36 @@ static inline u16 __iomem *isa_mtw(unsigned long addr)
(ISA_SEX ? out_be16(isa_mtw((unsigned long)(p)),(val)) \
: out_le16(isa_mtw((unsigned long)(p)),(val)))

+#ifdef CONFIG_ATARI_ROM_ISA
+#define isa_rom_inb(port) rom_in_8(isa_itb(port))
+#define isa_rom_inw(port) \
+ (ISA_SEX ? rom_in_be16(isa_itw(port)) \
+ : rom_in_le16(isa_itw(port)))
+
+#define isa_rom_outb(val, port) rom_out_8(isa_itb(port), (val))
+#define isa_rom_outw(val, port) \
+ (ISA_SEX ? rom_out_be16(isa_itw(port), (val)) \
+ : rom_out_le16(isa_itw(port), (val)))
+
+#define isa_rom_readb(p) rom_in_8(isa_mtb((unsigned long)(p)))
+#define isa_rom_readw(p) \
+ (ISA_SEX ? rom_in_be16(isa_mtw((unsigned long)(p))) \
+ : rom_in_le16(isa_mtw((unsigned long)(p))))
+#define isa_rom_readw_swap(p) \
+ (ISA_SEX ? rom_in_le16(isa_mtw((unsigned long)(p))) \
+ : rom_in_be16(isa_mtw((unsigned long)(p))))
+#define isa_rom_readw_raw(p) rom_in_be16(isa_mtw((unsigned long)(p)))
+
+#define isa_rom_writeb(val, p) rom_out_8(isa_mtb((unsigned long)(p)), (val))
+#define isa_rom_writew(val, p) \
+ (ISA_SEX ? rom_out_be16(isa_mtw((unsigned long)(p)), (val)) \
+ : rom_out_le16(isa_mtw((unsigned long)(p)), (val)))
+#define isa_rom_writew_swap(val, p) \
+ (ISA_SEX ? rom_out_le16(isa_mtw((unsigned long)(p)), (val)) \
+ : rom_out_be16(isa_mtw((unsigned long)(p)), (val)))
+#define isa_rom_writew_raw(val, p) rom_out_be16(isa_mtw((unsigned long)(p)), (val))
+#endif /* CONFIG_ATARI_ROM_ISA */
+
static inline void isa_delay(void)
{
switch(ISA_TYPE)
@@ -232,6 +296,9 @@ static inline void isa_delay(void)
#ifdef CONFIG_AMIGA_PCMCIA
case ISA_TYPE_AG: break;
#endif
+#ifdef CONFIG_ATARI_ROM_ISA
+ case ISA_TYPE_ENEC: break;
+#endif
default: break; /* avoid warnings */
}
}
@@ -263,6 +330,29 @@ static inline void isa_delay(void)
raw_outsw_swapw(isa_itw(port), (u16 *)(buf), (nr)<<1))

+#ifdef CONFIG_ATARI_ROM_ISA
+#define isa_rom_inb_p(p) ({ u8 _v = isa_rom_inb(p); isa_delay(); _v; })
+#define isa_rom_inw_p(p) ({ u16 _v = isa_rom_inw(p); isa_delay(); _v; })
+#define isa_rom_outb_p(v, p) ({ isa_rom_outb((v), (p)); isa_delay(); })
+#define isa_rom_outw_p(v, p) ({ isa_rom_outw((v), (p)); isa_delay(); })
+
+#define isa_rom_insb(port, buf, nr) raw_rom_insb(isa_itb(port), (u8 *)(buf), (nr))
+
+#define isa_rom_insw(port, buf, nr) \
+ (ISA_SEX ? raw_rom_insw(isa_itw(port), (u16 *)(buf), (nr)) : \
+ raw_rom_insw_swapw(isa_itw(port), (u16 *)(buf), (nr)))
+
+#define isa_rom_outsb(port, buf, nr) raw_rom_outsb(isa_itb(port), (u8 *)(buf), (nr))
+
+#define isa_rom_outsw(port, buf, nr) \
+ (ISA_SEX ? raw_rom_outsw(isa_itw(port), (u16 *)(buf), (nr)) : \
+ raw_rom_outsw_swapw(isa_itw(port), (u16 *)(buf), (nr)))
+#endif /* CONFIG_ATARI_ROM_ISA */
+
+#endif /* CONFIG_ISA || CONFIG_ATARI_ROM_ISA */
+
+
+#if defined(CONFIG_ISA) && !defined(CONFIG_ATARI_ROM_ISA)
#define inb isa_inb
#define inb_p isa_inb_p
#define outb isa_outb
@@ -285,9 +375,43 @@ static inline void isa_delay(void)
#define readw isa_readw
#define writeb isa_writeb
#define writew isa_writew
+#endif /* CONFIG_ISA && !CONFIG_ATARI_ROM_ISA */

-#else /* CONFIG_ISA */
-
+#ifdef CONFIG_ATARI_ROM_ISA
+/*
+ * kernel with both ROM port ISA and IDE compiled in, those have
+ * conflicting defs for in/out. Simply consider port < 1024
+ * ROM port ISA and everything else regular ISA for IDE. read,write defined
+ * below.
+ */
+#define inb(port) ((port) < 1024 ? isa_rom_inb(port) : in_8(port))
+#define inb_p(port) ((port) < 1024 ? isa_rom_inb_p(port) : in_8(port))
+#define inw(port) ((port) < 1024 ? isa_rom_inw(port) : in_le16(port))
+#define inw_p(port) ((port) < 1024 ? isa_rom_inw_p(port) : in_le16(port))
+#define inl isa_inl
+#define inl_p isa_inl_p
+
+#define outb(val, port) ((port) < 1024 ? isa_rom_outb((val), (port)) : out_8((port), (val)))
+#define outb_p(val, port) ((port) < 1024 ? isa_rom_outb_p((val), (port)) : out_8((port), (val)))
+#define outw(val, port) ((port) < 1024 ? isa_rom_outw((val), (port)) : out_le16((port), (val)))
+#define outw_p(val, port) ((port) < 1024 ? isa_rom_outw_p((val), (port)) : out_le16((port), (val)))
+#define outl isa_outl
+#define outl_p isa_outl_p
+
+#define insb(port, buf, nr) ((port) < 1024 ? isa_rom_insb((port), (buf), (nr)) : isa_insb((port), (buf), (nr)))
+#define insw(port, buf, nr) ((port) < 1024 ? isa_rom_insw((port), (buf), (nr)) : isa_insw((port), (buf), (nr)))
+#define insl isa_insl
+#define outsb(port, buf, nr) ((port) < 1024 ? isa_rom_outsb((port), (buf), (nr)) : isa_outsb((port), (buf), (nr)))
+#define outsw(port, buf, nr) ((port) < 1024 ? isa_rom_outsw((port), (buf), (nr)) : isa_outsw((port), (buf), (nr)))
+#define outsl isa_outsl
+
+#define readb(addr) in_8(addr)
+#define writeb(val, addr) out_8((addr), (val))
+#define readw(addr) in_le16(addr)
+#define writew(val, addr) out_le16((addr), (val))
+#endif /* CONFIG_ATARI_ROM_ISA */
+
+#if !defined(CONFIG_ISA) && !defined(CONFIG_ATARI_ROM_ISA)
/*
* We need to define dummy functions for GENERIC_IOMAP support.
*/
@@ -319,7 +443,7 @@ static inline void isa_delay(void)
#define readw(addr) in_le16(addr)
#define writew(val,addr) out_le16((addr),(val))

-#endif /* CONFIG_ISA */
+#endif /* !CONFIG_ISA && !CONFIG_ATARI_ROM_ISA */

#define readl(addr) in_le32(addr)
#define writel(val,addr) out_le32((addr),(val))
diff --git a/arch/m68k/include/asm/raw_io.h b/arch/m68k/include/asm/raw_io.h
index d9eb983..932faa3 100644
--- a/arch/m68k/include/asm/raw_io.h
+++ b/arch/m68k/include/asm/raw_io.h
@@ -10,7 +10,7 @@

#ifdef __KERNEL__

-#include <asm/types.h>
+#include <asm/byteorder.h>

/* Values for nocacheflag and cmode */
@@ -60,6 +60,57 @@ extern void __iounmap(void *addr, unsigned long size);
#define __raw_writew(val,addr) out_be16((addr),(val))
#define __raw_writel(val,addr) out_be32((addr),(val))

+/*
+ * Atari ROM port (cartridge port) ISA adapter, used for the EtherNEC NE2000
+ * network card driver.
+ * The ISA adapter connects address lines A9-A13 to ISA address lines A0-A4,
+ * and hardwires the rest of the ISA addresses for a base address of 0x300.
+ *
+ * Data lines D8-D15 are connected to ISA data lines D0-D7 for reading.
+ * For writes, address lines A1-A8 are latched to ISA data lines D0-D7
+ * (meaning the bit pattern on A1-A8 can be read back as byte).
+ *
+ * Read and write operations are distinguished by the base address used:
+ * reads are from the ROM A side range, writes are through the B side range
+ * addresses (A side base + 0x10000).
+ *
+ * Reads and writes are byte only.
+ *
+ * 16 bit reads and writes are necessary for the NetUSBee adapter's USB
+ * chipset - 16 bit words are read straight off the ROM port while 16 bit
+ * reads are split into two byte writes. The low byte is latched to the
+ * NetUSBee buffer by a read from the _read_ window (with the data pattern
+ * asserted as A1-A8 address pattern). The high byte is then written to the
+ * write range as usual, completing the write cycle.
+ */
+
+#if defined(CONFIG_ATARI_ROM_ISA)
+#define rom_in_8(addr) \
+ ({ u16 __v = (*(__force volatile u16 *) (addr)); __v >>= 8; __v; })
+#define rom_in_be16(addr) \
+ ({ u16 __v = (*(__force volatile u16 *) (addr)); __v; })
+#define rom_in_le16(addr) \
+ ({ u16 __v = le16_to_cpu(*(__force volatile u16 *) (addr)); __v; })
+
+#define rom_out_8(addr, b) \
+ ({u8 __w, __v = (b); u32 _addr = ((u32) (addr)); \
+ __w = ((*(__force volatile u8 *) ((_addr | 0x10000) + (__v<<1)))); })
+#define rom_out_be16(addr, w) \
+ ({u16 __w, __v = (w); u32 _addr = ((u32) (addr)); \
+ __w = ((*(__force volatile u16 *) ((_addr & 0xFFFF0000UL) + ((__v & 0xFF)<<1)))); \
+ __w = ((*(__force volatile u16 *) ((_addr | 0x10000) + ((__v >> 8)<<1)))); })
+#define rom_out_le16(addr, w) \
+ ({u16 __w, __v = (w); u32 _addr = ((u32) (addr)); \
+ __w = ((*(__force volatile u16 *) ((_addr & 0xFFFF0000UL) + ((__v >> 8)<<1)))); \
+ __w = ((*(__force volatile u16 *) ((_addr | 0x10000) + ((__v & 0xFF)<<1)))); })
+
+#define raw_rom_inb rom_in_8
+#define raw_rom_inw rom_in_be16
+
+#define raw_rom_outb(val, port) rom_out_8((port), (val))
+#define raw_rom_outw(val, port) rom_out_be16((port), (val))
+#endif /* CONFIG_ATARI_ROM_ISA */
+
static inline void raw_insb(volatile u8 __iomem *port, u8 *buf, unsigned int len)
{
unsigned int i;
@@ -342,6 +393,62 @@ static inline void raw_outsw_swapw(volatile u16 __iomem *port, const u16 *buf,
: "d0", "a0", "a1", "d6");
}

+
+#if defined(CONFIG_ATARI_ROM_ISA)
+static inline void raw_rom_insb(volatile u8 __iomem *port, u8 *buf, unsigned int len)
+{
+ unsigned int i;
+
+ for (i = 0; i < len; i++)
+ *buf++ = rom_in_8(port);
+}
+
+static inline void raw_rom_outsb(volatile u8 __iomem *port, const u8 *buf,
+ unsigned int len)
+{
+ unsigned int i;
+
+ for (i = 0; i < len; i++)
+ rom_out_8(port, *buf++);
+}
+
+static inline void raw_rom_insw(volatile u16 __iomem *port, u16 *buf,
+ unsigned int nr)
+{
+ unsigned int i;
+
+ for (i = 0; i < nr; i++)
+ *buf++ = rom_in_be16(port);
+}
+
+static inline void raw_rom_outsw(volatile u16 __iomem *port, const u16 *buf,
+ unsigned int nr)
+{
+ unsigned int i;
+
+ for (i = 0; i < nr; i++)
+ rom_out_be16(port, *buf++);
+}
+
+static inline void raw_rom_insw_swapw(volatile u16 __iomem *port, u16 *buf,
+ unsigned int nr)
+{
+ unsigned int i;
+
+ for (i = 0; i < nr; i++)
+ *buf++ = rom_in_le16(port);
+}
+
+static inline void raw_rom_outsw_swapw(volatile u16 __iomem *port, const u16 *buf,
+ unsigned int nr)
+{
+ unsigned int i;
+
+ for (i = 0; i < nr; i++)
+ rom_out_le16(port, *buf++);
+}
+#endif /* CONFIG_ATARI_ROM_ISA */
+
#endif /* __KERNEL__ */

#endif /* _RAW_IO_H */
diff --git a/arch/m68k/kernel/setup_mm.c b/arch/m68k/kernel/setup_mm.c
index 80cfbe5..e67e531 100644
--- a/arch/m68k/kernel/setup_mm.c
+++ b/arch/m68k/kernel/setup_mm.c
@@ -381,6 +381,12 @@ void __init setup_arch(char **cmdline_p)
isa_sex = 1;
}
#endif
+#ifdef CONFIG_ATARI_ROM_ISA
+ if (MACH_IS_ATARI) {
+ isa_type = ISA_TYPE_ENEC;
+ isa_sex = 0;
+ }
+#endif
#endif
}

--
1.7.0.4