On Sun, Nov 22, 2009 at 3:01 PM, Albert Herranz [off-list ref] w=
rote:

Add support for using the USB Gecko adapter as a bootwrapper console on
the Nintendo GameCube and Wii video game consoles.
The USB Gecko is a 3rd party memory card interface adapter that provides
a EXI (External Interface) to USB serial converter.

Signed-off-by: Albert Herranz <redacted>

Acked-by: Grant Likely <redacted>

---
=A0arch/powerpc/boot/Makefile | =A0 =A02 +-
=A0arch/powerpc/boot/ugecon.c | =A0128 ++++++++++++++++++++++++++++++++++=

++++++++++

c \

=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0gunzip_util.c elf_util.c $(zlib) devtree.c=

 oflib.c ofconsole.c \

=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A04xx.c ebony.c mv64x60.c mpsc.c mv64x60_i2c=

.c cuboot.c bamboo.c \

=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0cpm-serial.c stdlib.c mpc52xx-psc.c planet=

core.c uartlite.c \

- =A0 =A0 =A0 =A0 =A0 =A0 =A0 fsl-soc.c mpc8xx.c pq2.c
+ =A0 =A0 =A0 =A0 =A0 =A0 =A0 fsl-soc.c mpc8xx.c pq2.c ugecon.c
=A0src-plat :=3D of.c cuboot-52xx.c cuboot-824x.c cuboot-83xx.c cuboot-85=

xx.c holly.c \

=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0cuboot-ebony.c cuboot-hotfoot.c treeboot-e=

bony.c prpmc2800.c \

=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0ps3-head.S ps3-hvcall.S ps3.c treeboot-bam=

boo.c cuboot-8xx.c \

01 */

+
+#define EXI_CR =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A00x0c
+#define =A0 EXI_CR_TSTART =A0 =A0 =A0 =A0 (1<<0)
+#define =A0 EXI_CR_WRITE =A0 =A0 =A0 =A0 (1<<2)
+#define =A0 EXI_CR_READ_WRITE =A0 =A0 (2<<2)
+#define =A0 EXI_CR_TLEN(len) =A0 =A0 =A0(((len)-1)<<4)
+
+#define EXI_DATA =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A00x10
+
+
+/* virtual address base for input/output, retrieved from device tree */
+static void *ug_io_base;
+
+
+static u32 ug_io_transaction(u32 in)
+{
+ =A0 =A0 =A0 u32 *csr_reg =3D ug_io_base + EXI_CSR;
+ =A0 =A0 =A0 u32 *data_reg =3D ug_io_base + EXI_DATA;
+ =A0 =A0 =A0 u32 *cr_reg =3D ug_io_base + EXI_CR;
+ =A0 =A0 =A0 u32 csr, data, cr;
+
+ =A0 =A0 =A0 /* select */
+ =A0 =A0 =A0 csr =3D EXI_CSR_CLK_32MHZ | EXI_CSR_CS_0;
+ =A0 =A0 =A0 out_be32(csr_reg, csr);
+
+ =A0 =A0 =A0 /* read/write */
+ =A0 =A0 =A0 data =3D in;
+ =A0 =A0 =A0 out_be32(data_reg, data);
+ =A0 =A0 =A0 cr =3D EXI_CR_TLEN(2) | EXI_CR_READ_WRITE | EXI_CR_TSTART;
+ =A0 =A0 =A0 out_be32(cr_reg, cr);
+
+ =A0 =A0 =A0 while (in_be32(cr_reg) & EXI_CR_TSTART)
+ =A0 =A0 =A0 =A0 =A0 =A0 =A0 barrier();
+
+ =A0 =A0 =A0 /* deselect */
+ =A0 =A0 =A0 out_be32(csr_reg, 0);
+
+ =A0 =A0 =A0 data =3D in_be32(data_reg);
+ =A0 =A0 =A0 return data;
+}
+
+static int ug_is_txfifo_ready(void)
+{
+ =A0 =A0 =A0 return ug_io_transaction(0xc0000000) & 0x04000000;
+}
+
+static void ug_raw_putc(char ch)
+{
+ =A0 =A0 =A0 ug_io_transaction(0xb0000000 | (ch << 20));
+}
+
+static void ug_putc(char ch)
+{
+ =A0 =A0 =A0 int count =3D 16;
+
+ =A0 =A0 =A0 if (!ug_io_base)
+ =A0 =A0 =A0 =A0 =A0 =A0 =A0 return;
+
+ =A0 =A0 =A0 while (!ug_is_txfifo_ready() && count--)
+ =A0 =A0 =A0 =A0 =A0 =A0 =A0 barrier();
+ =A0 =A0 =A0 if (count)
+ =A0 =A0 =A0 =A0 =A0 =A0 =A0 ug_raw_putc(ch);
+}
+
+void ug_console_write(const char *buf, int len)
+{
+ =A0 =A0 =A0 char *b =3D (char *)buf;
+
+ =A0 =A0 =A0 while (len--) {
+ =A0 =A0 =A0 =A0 =A0 =A0 =A0 if (*b =3D=3D '\n')
+ =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 ug_putc('\r');
+ =A0 =A0 =A0 =A0 =A0 =A0 =A0 ug_putc(*b++);
+ =A0 =A0 =A0 }
+}
+
+int ug_is_adapter_present(void)
+{
+ =A0 =A0 =A0 if (!ug_io_base)
+ =A0 =A0 =A0 =A0 =A0 =A0 =A0 return 0;
+
+ =A0 =A0 =A0 return ug_io_transaction(0x90000000) =3D=3D 0x04700000;
+}
+
+int ug_grab_io_base(void)
+{
+ =A0 =A0 =A0 u32 v;
+ =A0 =A0 =A0 void *devp;
+
+ =A0 =A0 =A0 devp =3D find_node_by_alias("ugecon");
+ =A0 =A0 =A0 if (devp =3D=3D NULL)
+ =A0 =A0 =A0 =A0 =A0 =A0 =A0 goto err_out;
+ =A0 =A0 =A0 if (getprop(devp, "virtual-reg", &v, sizeof(v)) !=3D sizeof=

(v))

--=20
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.