Add hwstub support for portal player (manufacturer mode)

It is very similar to how e200tool from MrH works but uses the framework
of hwstub which is makes it completely trivial since we already have the
USB driver written.

Change-Id: I61cdc245d3f828c2682bcd6ecfed5a1cc0094139

utils/hwstub/hwstub_protocol.h

@@ -95,6 +95,7 @@ struct hwstub_stmp_desc_t
 #define HWSTUB_TARGET_UNK       ('U' | 'N' << 8 | 'K' << 16 | ' ' << 24)
 #define HWSTUB_TARGET_STMP      ('S' | 'T' << 8 | 'M' << 16 | 'P' << 24)
 #define HWSTUB_TARGET_RK27      ('R' | 'K' << 8 | '2' << 16 | '7' << 24)
+#define HWSTUB_TARGET_PP        ('P' | 'P' << 8 | ' ' << 16 | ' ' << 24)
 
 struct hwstub_target_desc_t
 {

utils/hwstub/stub/SOURCES

@@ -15,4 +15,8 @@ usb_drv_arc.c
 rk27xx/crt0.S
 rk27xx/usb_drv_rk27xx.c
 rk27xx/target.c
+#elif defined(CONFIG_PP)
+pp/crt0.S
+pp/target.c
+usb_drv_arc.c
 #endif

utils/hwstub/stub/pp/Makefile

@@ -0,0 +1,14 @@
+#
+# common
+#
+CC=arm-elf-eabi-gcc
+LD=arm-elf-eabi-gcc
+AS=arm-elf-eabi-gcc
+OC=arm-elf-eabi-objcopy
+DEFINES=
+INCLUDES=-I$(CURDIR)
+GCCOPTS=-mcpu=arm926ej-s
+BUILD_DIR=$(CURDIR)/build/
+ROOT_DIR=$(CURDIR)/..
+
+include ../hwstub.make

utils/hwstub/stub/pp/crt0.S

@@ -0,0 +1,42 @@
+.section    .text,"ax",%progbits
+.code       32
+.align      0x04
+.global     start
+start:
+    sub     r7, pc, #8 /* Copy running address */
+    msr     cpsr_c, #0xd3 /* enter supervisor mode, disable IRQ/FIQ */
+    /* The stub could be located at a virtual address so killing the MMU at
+     * this point would be mere suicide. We assume that the remap location
+     * is identically mapped and kill the MMU after the copy */
+
+    /* Relocate to right address */
+    mov    r2, r7
+    ldr    r3, =_copystart
+    ldr    r4, =_copyend
+1:
+    cmp     r4, r3
+    ldrhi   r5, [r2], #4
+    strhi   r5, [r3], #4
+    bhi     1b
+    mov     r2, #0
+    mcr     p15, 0, r2, c7, c5, 0   @ Invalidate ICache
+    /* Jump to real location */
+    ldr     pc, =remap
+remap:
+    /* Disable MMU, disable caching and buffering;
+     * use low exception range address */
+    mrc     p15, 0, r0, c1, c0, 0
+    ldr     r1, =0x3005
+    bic     r0, r1
+    mcr     p15, 0, r0, c1, c0, 0
+    /* clear bss */
+    ldr     r2, =bss_start
+    ldr     r3, =bss_end
+    mov     r4, #0
+1:
+    cmp     r3, r2
+    strhi   r4, [r2], #4
+    bhi     1b
+    /* jump to C code */
+    ldr     sp, =oc_stackend
+    b       main

utils/hwstub/stub/pp/hwstub.lds

@@ -0,0 +1,73 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2014 by Amaury Pouly
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "config.h"
+
+ENTRY(start)
+OUTPUT_FORMAT(elf32-littlearm)
+OUTPUT_ARCH(arm)
+STARTUP(pp/crt0.o)
+
+#define IRAM_END_ADDR   (IRAM_ORIG + IRAM_SIZE)
+
+MEMORY
+{
+    OCRAM : ORIGIN = IRAM_ORIG, LENGTH = IRAM_SIZE
+}
+
+SECTIONS
+{
+    .octext :
+    {
+        _copystart = .;
+        oc_codestart = .;
+        *(.text*)
+        *(.icode*)
+        *(.data*)
+        *(.rodata*)
+        _copyend = .;
+    } > OCRAM
+
+    .bss (NOLOAD) :
+    {
+        bss_start = .;
+        *(.bss)
+        bss_end = .;
+    } > OCRAM
+
+    .stack (NOLOAD) :
+    {
+        oc_codeend = .;
+        oc_stackstart = .;
+        . += STACK_SIZE;
+        oc_stackend = .;
+        oc_bufferstart = .;
+    } > OCRAM
+
+    .ocend IRAM_END_ADDR (NOLOAD) :
+    {
+        oc_bufferend = .;
+    } > OCRAM
+
+    /DISCARD/ :
+    {
+        *(.eh_frame)
+    } 
+}

utils/hwstub/stub/pp/target-config.h

@@ -0,0 +1,9 @@
+#define CONFIG_PP
+#define IRAM_ORIG       0x40000000
+#define IRAM_SIZE       0x20000
+#define DRAM_ORIG       0x10f00000
+#define DRAM_SIZE       (MEMORYSIZE * 0x100000)
+#define CPU_ARM
+#define ARM_ARCH        5
+#define USB_BASE            0xc5000000
+#define USB_NUM_ENDPOINTS   2

utils/hwstub/stub/pp/target.c

@@ -0,0 +1,66 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2014 by Amaury Pouly
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "stddef.h"
+#include "target.h"
+#include "system.h"
+#include "logf.h"
+#include "memory.h"
+
+/**
+ *
+ * Global
+ *
+ */
+
+/* FIXME wrong for PP500x */
+#define USEC_TIMER   (*(volatile unsigned long *)(0x60005010))
+
+struct hwstub_target_desc_t __attribute__((aligned(2))) target_descriptor =
+{
+    sizeof(struct hwstub_target_desc_t),
+    HWSTUB_DT_TARGET,
+    HWSTUB_TARGET_PP,
+    "PP500x / PP502x / PP610x"
+};
+
+void target_init(void)
+{
+}
+
+void target_get_desc(int desc, void **buffer)
+{
+    *buffer = NULL;
+}
+
+void target_get_config_desc(void *buffer, int *size)
+{
+}
+
+void target_udelay(int us)
+{
+    uint32_t end = USEC_TIMER + us;
+    while(USEC_TIMER <= end);
+}
+
+void target_mdelay(int ms)
+{
+    return target_udelay(ms * 1000);
+}