blackfin architecture

This adds support for the Analog Devices Blackfin processor architecture, and
currently supports the BF533, BF532, BF531, BF537, BF536, BF534, and BF561
(Dual Core) devices, with a variety of development platforms including those
avaliable from Analog Devices (BF533-EZKit, BF533-STAMP, BF537-STAMP,
BF561-EZKIT), and Bluetechnix!  Tinyboards.

The Blackfin architecture was jointly developed by Intel and Analog Devices
Inc.  (ADI) as the Micro Signal Architecture (MSA) core and introduced it in
December of 2000.  Since then ADI has put this core into its Blackfin
processor family of devices.  The Blackfin core has the advantages of a clean,
orthogonal,RISC-like microprocessor instruction set.  It combines a dual-MAC
(Multiply/Accumulate), state-of-the-art signal processing engine and
single-instruction, multiple-data (SIMD) multimedia capabilities into a single
instruction-set architecture.

The Blackfin architecture, including the instruction set, is described by the
ADSP-BF53x/BF56x Blackfin Processor Programming Reference
http://blackfin.uclinux.org/gf/download/frsrelease/29/2549/Blackfin_PRM.pdf

The Blackfin processor is already supported by major releases of gcc, and
there are binary and source rpms/tarballs for many architectures at:
http://blackfin.uclinux.org/gf/project/toolchain/frs There is complete
documentation, including "getting started" guides available at:
http://docs.blackfin.uclinux.org/ which provides links to the sources and
patches you will need in order to set up a cross-compiling environment for
bfin-linux-uclibc

This patch, as well as the other patches (toolchain, distribution,
uClibc) are actively supported by Analog Devices Inc, at:
http://blackfin.uclinux.org/

We have tested this on LTP, and our test plan (including pass/fails) can
be found at:
http://docs.blackfin.uclinux.org/doku.php?id=testing_the_linux_kernel

[m.kozlowski@tuxland.pl: balance parenthesis in blackfin header files]
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: Aubrey Li <aubrey.li@analog.com>
Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 209 insertions, 0 deletions

diff --git a/include/asm-blackfin/bf5xx_timers.h b/include/asm-blackfin/bf5xx_timers.h
new file mode 100644
index 000000000000..86c770321b61
--- /dev/null
+++ b/include/asm-blackfin/bf5xx_timers.h
@@ -0,0 +1,209 @@
+/*
+ * include/asm/bf5xx_timers.h
+ *
+ * This file contains the major Data structures and constants
+ * used for General Purpose Timer Implementation in BF5xx
+ *
+ * Copyright (C) 2005 John DeHority
+ * Copyright (C) 2006 Hella Aglaia GmbH (awe@aglaia-gmbh.de)
+ *
+ */
+
+#ifndef _BLACKFIN_TIMERS_H_
+#define _BLACKFIN_TIMERS_H_
+
+#undef MAX_BLACKFIN_GPTIMERS
+/*
+ * BF537: 8 timers:
+ */
+#if defined(CONFIG_BF537)
+#  define MAX_BLACKFIN_GPTIMERS 8
+#  define TIMER0_GROUP_REG     TIMER_ENABLE
+#endif
+/*
+ * BF561: 12 timers:
+ */
+#if defined(CONFIG_BF561)
+#  define MAX_BLACKFIN_GPTIMERS 12
+#  define TIMER0_GROUP_REG     TMRS8_ENABLE
+#  define TIMER8_GROUP_REG     TMRS4_ENABLE
+#endif
+/*
+ * All others: 3 timers:
+ */
+#if !defined(MAX_BLACKFIN_GPTIMERS)
+#  define MAX_BLACKFIN_GPTIMERS 3
+#  define TIMER0_GROUP_REG     TIMER_ENABLE
+#endif
+
+#define BLACKFIN_GPTIMER_IDMASK ((1UL << MAX_BLACKFIN_GPTIMERS) - 1)
+#define BFIN_TIMER_OCTET(x) ((x) >> 3)
+
+/* used in masks for timer_enable() and timer_disable() */
+#define TIMER0bit  0x0001  /*  0001b */
+#define TIMER1bit  0x0002  /*  0010b */
+#define TIMER2bit  0x0004  /*  0100b */
+
+#if (MAX_BLACKFIN_GPTIMERS > 3)
+#  define TIMER3bit  0x0008
+#  define TIMER4bit  0x0010
+#  define TIMER5bit  0x0020
+#  define TIMER6bit  0x0040
+#  define TIMER7bit  0x0080
+#endif
+
+#if (MAX_BLACKFIN_GPTIMERS > 8)
+#  define TIMER8bit  0x0100
+#  define TIMER9bit  0x0200
+#  define TIMER10bit 0x0400
+#  define TIMER11bit 0x0800
+#endif
+
+#define TIMER0_id   0
+#define TIMER1_id   1
+#define TIMER2_id   2
+
+#if (MAX_BLACKFIN_GPTIMERS > 3)
+#  define TIMER3_id   3
+#  define TIMER4_id   4
+#  define TIMER5_id   5
+#  define TIMER6_id   6
+#  define TIMER7_id   7
+#endif
+
+#if (MAX_BLACKFIN_GPTIMERS > 8)
+#  define TIMER8_id   8
+#  define TIMER9_id   9
+#  define TIMER10_id 10
+#  define TIMER11_id 11
+#endif
+
+/* associated timers for ppi framesync: */
+
+#if defined(CONFIG_BF561)
+#  define FS0_1_TIMER_ID   TIMER8_id
+#  define FS0_2_TIMER_ID   TIMER9_id
+#  define FS1_1_TIMER_ID   TIMER10_id
+#  define FS1_2_TIMER_ID   TIMER11_id
+#  define FS0_1_TIMER_BIT  TIMER8bit
+#  define FS0_2_TIMER_BIT  TIMER9bit
+#  define FS1_1_TIMER_BIT  TIMER10bit
+#  define FS1_2_TIMER_BIT  TIMER11bit
+#  undef FS1_TIMER_ID
+#  undef FS2_TIMER_ID
+#  undef FS1_TIMER_BIT
+#  undef FS2_TIMER_BIT
+#else
+#  define FS1_TIMER_ID  TIMER0_id
+#  define FS2_TIMER_ID  TIMER1_id
+#  define FS1_TIMER_BIT TIMER0bit
+#  define FS2_TIMER_BIT TIMER1bit
+#endif
+
+/*
+** Timer Configuration Register Bits
+*/
+#define TIMER_ERR           0xC000
+#define TIMER_ERR_OVFL      0x4000
+#define TIMER_ERR_PROG_PER  0x8000
+#define TIMER_ERR_PROG_PW   0xC000
+#define TIMER_EMU_RUN       0x0200
+#define TIMER_TOGGLE_HI     0x0100
+#define TIMER_CLK_SEL       0x0080
+#define TIMER_OUT_DIS       0x0040
+#define TIMER_TIN_SEL       0x0020
+#define TIMER_IRQ_ENA       0x0010
+#define TIMER_PERIOD_CNT    0x0008
+#define TIMER_PULSE_HI      0x0004
+#define TIMER_MODE          0x0003
+#define TIMER_MODE_PWM      0x0001
+#define TIMER_MODE_WDTH     0x0002
+#define TIMER_MODE_EXT_CLK  0x0003
+
+/*
+** Timer Status Register Bits
+*/
+#define TIMER_STATUS_TIMIL0 0x0001
+#define TIMER_STATUS_TIMIL1 0x0002
+#define TIMER_STATUS_TIMIL2 0x0004
+#if (MAX_BLACKFIN_GPTIMERS > 3)
+#  define TIMER_STATUS_TIMIL3 0x00000008
+#  define TIMER_STATUS_TIMIL4 0x00010000
+#  define TIMER_STATUS_TIMIL5 0x00020000
+#  define TIMER_STATUS_TIMIL6 0x00040000
+#  define TIMER_STATUS_TIMIL7 0x00080000
+#  if (MAX_BLACKFIN_GPTIMERS > 8)
+#    define TIMER_STATUS_TIMIL8  0x0001
+#    define TIMER_STATUS_TIMIL9  0x0002
+#    define TIMER_STATUS_TIMIL10 0x0004
+#    define TIMER_STATUS_TIMIL11 0x0008
+#  endif
+#  define TIMER_STATUS_INTR   0x000F000F
+#else
+#  define TIMER_STATUS_INTR   0x0007    /* any timer interrupt */
+#endif
+
+#define TIMER_STATUS_TOVF0  0x0010      /* timer 0 overflow error */
+#define TIMER_STATUS_TOVF1  0x0020
+#define TIMER_STATUS_TOVF2  0x0040
+#if (MAX_BLACKFIN_GPTIMERS > 3)
+#  define TIMER_STATUS_TOVF3  0x00000080
+#  define TIMER_STATUS_TOVF4  0x00100000
+#  define TIMER_STATUS_TOVF5  0x00200000
+#  define TIMER_STATUS_TOVF6  0x00400000
+#  define TIMER_STATUS_TOVF7  0x00800000
+#  if (MAX_BLACKFIN_GPTIMERS > 8)
+#    define TIMER_STATUS_TOVF8   0x0010
+#    define TIMER_STATUS_TOVF9   0x0020
+#    define TIMER_STATUS_TOVF10  0x0040
+#    define TIMER_STATUS_TOVF11  0x0080
+#  endif
+#  define TIMER_STATUS_OFLOW  0x00F000F0
+#else
+#  define TIMER_STATUS_OFLOW  0x0070    /* any timer overflow */
+#endif
+
+/*
+** Timer Slave Enable Status : write 1 to clear
+*/
+#define TIMER_STATUS_TRUN0  0x1000
+#define TIMER_STATUS_TRUN1  0x2000
+#define TIMER_STATUS_TRUN2  0x4000
+#if (MAX_BLACKFIN_GPTIMERS > 3)
+#  define TIMER_STATUS_TRUN3  0x00008000
+#  define TIMER_STATUS_TRUN4  0x10000000
+#  define TIMER_STATUS_TRUN5  0x20000000
+#  define TIMER_STATUS_TRUN6  0x40000000
+#  define TIMER_STATUS_TRUN7  0x80000000
+#  define TIMER_STATUS_TRUN   0xF000F000
+#  if (MAX_BLACKFIN_GPTIMERS > 8)
+#    define TIMER_STATUS_TRUN8  0x1000
+#    define TIMER_STATUS_TRUN9  0x2000
+#    define TIMER_STATUS_TRUN10 0x4000
+#    define TIMER_STATUS_TRUN11 0x8000
+#  endif
+#else
+#  define TIMER_STATUS_TRUN   0x7000
+#endif
+
+/*******************************************************************************
+*       GP_TIMER API's
+*******************************************************************************/
+
+void  set_gptimer_pwidth    (int timer_id, int width);
+int   get_gptimer_pwidth    (int timer_id);
+void  set_gptimer_period    (int timer_id, int period);
+int   get_gptimer_period    (int timer_id);
+int   get_gptimer_count     (int timer_id);
+short get_gptimer_intr      (int timer_id);
+void  set_gptimer_config    (int timer_id, short config);
+short get_gptimer_config    (int timer_id);
+void  set_gptimer_pulse_hi  (int timer_id);
+void  clear_gptimer_pulse_hi(int timer_id);
+void  enable_gptimers       (short mask);
+void  disable_gptimers      (short mask);
+short get_enabled_timers    (void);
+int   get_gptimer_status    (int octet);
+void  set_gptimer_status    (int octet, int value);
+
+#endif