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, 367 insertions, 0 deletions

diff --git a/include/asm-blackfin/gpio.h b/include/asm-blackfin/gpio.h
new file mode 100644
index 000000000000..d16fe3cd6135
--- /dev/null
+++ b/include/asm-blackfin/gpio.h
@@ -0,0 +1,367 @@
+/*
+ * File:         arch/blackfin/kernel/bfin_gpio.h
+ * Based on:
+ * Author:	 Michael Hennerich (hennerich@blackfin.uclinux.org)
+ *
+ * Created:
+ * Description:
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+/*
+*  Number     BF537/6/4    BF561    BF533/2/1
+*
+*  GPIO_0       PF0         PF0        PF0
+*  GPIO_1       PF1         PF1        PF1
+*  GPIO_2       PF2         PF2        PF2
+*  GPIO_3       PF3         PF3        PF3
+*  GPIO_4       PF4         PF4        PF4
+*  GPIO_5       PF5         PF5        PF5
+*  GPIO_6       PF6         PF6        PF6
+*  GPIO_7       PF7         PF7        PF7
+*  GPIO_8       PF8         PF8        PF8
+*  GPIO_9       PF9         PF9        PF9
+*  GPIO_10      PF10        PF10       PF10
+*  GPIO_11      PF11        PF11       PF11
+*  GPIO_12      PF12        PF12       PF12
+*  GPIO_13      PF13        PF13       PF13
+*  GPIO_14      PF14        PF14       PF14
+*  GPIO_15      PF15        PF15       PF15
+*  GPIO_16      PG0         PF16
+*  GPIO_17      PG1         PF17
+*  GPIO_18      PG2         PF18
+*  GPIO_19      PG3         PF19
+*  GPIO_20      PG4         PF20
+*  GPIO_21      PG5         PF21
+*  GPIO_22      PG6         PF22
+*  GPIO_23      PG7         PF23
+*  GPIO_24      PG8         PF24
+*  GPIO_25      PG9         PF25
+*  GPIO_26      PG10        PF26
+*  GPIO_27      PG11        PF27
+*  GPIO_28      PG12        PF28
+*  GPIO_29      PG13        PF29
+*  GPIO_30      PG14        PF30
+*  GPIO_31      PG15        PF31
+*  GPIO_32      PH0         PF32
+*  GPIO_33      PH1         PF33
+*  GPIO_34      PH2         PF34
+*  GPIO_35      PH3         PF35
+*  GPIO_36      PH4         PF36
+*  GPIO_37      PH5         PF37
+*  GPIO_38      PH6         PF38
+*  GPIO_39      PH7         PF39
+*  GPIO_40      PH8         PF40
+*  GPIO_41      PH9         PF41
+*  GPIO_42      PH10        PF42
+*  GPIO_43      PH11        PF43
+*  GPIO_44      PH12        PF44
+*  GPIO_45      PH13        PF45
+*  GPIO_46      PH14        PF46
+*  GPIO_47      PH15        PF47
+*/
+
+#ifndef __ARCH_BLACKFIN_GPIO_H__
+#define __ARCH_BLACKFIN_GPIO_H__
+
+#define gpio_bank(x) ((x) >> 4)
+#define gpio_bit(x)  (1<<((x) & 0xF))
+#define gpio_sub_n(x) ((x) & 0xF)
+
+#define GPIO_BANKSIZE 16
+
+#define	GPIO_0	0
+#define	GPIO_1	1
+#define	GPIO_2	2
+#define	GPIO_3	3
+#define	GPIO_4	4
+#define	GPIO_5	5
+#define	GPIO_6	6
+#define	GPIO_7	7
+#define	GPIO_8	8
+#define	GPIO_9	9
+#define	GPIO_10	10
+#define	GPIO_11	11
+#define	GPIO_12	12
+#define	GPIO_13	13
+#define	GPIO_14	14
+#define	GPIO_15	15
+#define	GPIO_16	16
+#define	GPIO_17	17
+#define	GPIO_18	18
+#define	GPIO_19	19
+#define	GPIO_20	20
+#define	GPIO_21	21
+#define	GPIO_22	22
+#define	GPIO_23	23
+#define	GPIO_24	24
+#define	GPIO_25	25
+#define	GPIO_26	26
+#define	GPIO_27	27
+#define	GPIO_28	28
+#define	GPIO_29	29
+#define	GPIO_30	30
+#define	GPIO_31	31
+#define	GPIO_32	32
+#define	GPIO_33	33
+#define	GPIO_34	34
+#define	GPIO_35	35
+#define	GPIO_36	36
+#define	GPIO_37	37
+#define	GPIO_38	38
+#define	GPIO_39	39
+#define	GPIO_40	40
+#define	GPIO_41	41
+#define	GPIO_42	42
+#define	GPIO_43	43
+#define	GPIO_44	44
+#define	GPIO_45	45
+#define	GPIO_46	46
+#define	GPIO_47	47
+
+
+#define PERIPHERAL_USAGE 1
+#define GPIO_USAGE 0
+
+#ifdef BF533_FAMILY
+#define MAX_BLACKFIN_GPIOS 16
+#endif
+
+#ifdef BF537_FAMILY
+#define MAX_BLACKFIN_GPIOS 48
+#define PORT_F 0
+#define PORT_G 1
+#define PORT_H 2
+#define PORT_J 3
+
+#define	GPIO_PF0	0
+#define	GPIO_PF1	1
+#define	GPIO_PF2	2
+#define	GPIO_PF3	3
+#define	GPIO_PF4	4
+#define	GPIO_PF5	5
+#define	GPIO_PF6	6
+#define	GPIO_PF7	7
+#define	GPIO_PF8	8
+#define	GPIO_PF9	9
+#define	GPIO_PF10	10
+#define	GPIO_PF11	11
+#define	GPIO_PF12	12
+#define	GPIO_PF13	13
+#define	GPIO_PF14	14
+#define	GPIO_PF15	15
+#define	GPIO_PG0	16
+#define	GPIO_PG1	17
+#define	GPIO_PG2	18
+#define	GPIO_PG3	19
+#define	GPIO_PG4	20
+#define	GPIO_PG5	21
+#define	GPIO_PG6	22
+#define	GPIO_PG7	23
+#define	GPIO_PG8	24
+#define	GPIO_PG9	25
+#define	GPIO_PG10      	26
+#define	GPIO_PG11      	27
+#define	GPIO_PG12      	28
+#define	GPIO_PG13      	29
+#define	GPIO_PG14      	30
+#define	GPIO_PG15      	31
+#define	GPIO_PH0	32
+#define	GPIO_PH1	33
+#define	GPIO_PH2	34
+#define	GPIO_PH3	35
+#define	GPIO_PH4	36
+#define	GPIO_PH5	37
+#define	GPIO_PH6	38
+#define	GPIO_PH7	39
+#define	GPIO_PH8	40
+#define	GPIO_PH9	41
+#define	GPIO_PH10      	42
+#define	GPIO_PH11      	43
+#define	GPIO_PH12      	44
+#define	GPIO_PH13      	45
+#define	GPIO_PH14      	46
+#define	GPIO_PH15      	47
+
+#endif
+
+#ifdef BF561_FAMILY
+#define MAX_BLACKFIN_GPIOS 48
+#define PORT_FIO0 0
+#define PORT_FIO1 1
+#define PORT_FIO2 2
+#endif
+
+#ifndef __ASSEMBLY__
+
+/***********************************************************
+*
+* FUNCTIONS: Blackfin General Purpose Ports Access Functions
+*
+* INPUTS/OUTPUTS:
+* gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
+*
+*
+* DESCRIPTION: These functions abstract direct register access
+*              to Blackfin processor General Purpose
+*              Ports Regsiters
+*
+* CAUTION: These functions do not belong to the GPIO Driver API
+*************************************************************
+* MODIFICATION HISTORY :
+**************************************************************/
+
+void set_gpio_dir(unsigned short, unsigned short);
+void set_gpio_inen(unsigned short, unsigned short);
+void set_gpio_polar(unsigned short, unsigned short);
+void set_gpio_edge(unsigned short, unsigned short);
+void set_gpio_both(unsigned short, unsigned short);
+void set_gpio_data(unsigned short, unsigned short);
+void set_gpio_maska(unsigned short, unsigned short);
+void set_gpio_maskb(unsigned short, unsigned short);
+void set_gpio_toggle(unsigned short);
+void set_gpiop_dir(unsigned short, unsigned short);
+void set_gpiop_inen(unsigned short, unsigned short);
+void set_gpiop_polar(unsigned short, unsigned short);
+void set_gpiop_edge(unsigned short, unsigned short);
+void set_gpiop_both(unsigned short, unsigned short);
+void set_gpiop_data(unsigned short, unsigned short);
+void set_gpiop_maska(unsigned short, unsigned short);
+void set_gpiop_maskb(unsigned short, unsigned short);
+unsigned short get_gpio_dir(unsigned short);
+unsigned short get_gpio_inen(unsigned short);
+unsigned short get_gpio_polar(unsigned short);
+unsigned short get_gpio_edge(unsigned short);
+unsigned short get_gpio_both(unsigned short);
+unsigned short get_gpio_maska(unsigned short);
+unsigned short get_gpio_maskb(unsigned short);
+unsigned short get_gpio_data(unsigned short);
+unsigned short get_gpiop_dir(unsigned short);
+unsigned short get_gpiop_inen(unsigned short);
+unsigned short get_gpiop_polar(unsigned short);
+unsigned short get_gpiop_edge(unsigned short);
+unsigned short get_gpiop_both(unsigned short);
+unsigned short get_gpiop_maska(unsigned short);
+unsigned short get_gpiop_maskb(unsigned short);
+unsigned short get_gpiop_data(unsigned short);
+
+struct gpio_port_t {
+	unsigned short data;
+	unsigned short dummy1;
+	unsigned short data_clear;
+	unsigned short dummy2;
+	unsigned short data_set;
+	unsigned short dummy3;
+	unsigned short toggle;
+	unsigned short dummy4;
+	unsigned short maska;
+	unsigned short dummy5;
+	unsigned short maska_clear;
+	unsigned short dummy6;
+	unsigned short maska_set;
+	unsigned short dummy7;
+	unsigned short maska_toggle;
+	unsigned short dummy8;
+	unsigned short maskb;
+	unsigned short dummy9;
+	unsigned short maskb_clear;
+	unsigned short dummy10;
+	unsigned short maskb_set;
+	unsigned short dummy11;
+	unsigned short maskb_toggle;
+	unsigned short dummy12;
+	unsigned short dir;
+	unsigned short dummy13;
+	unsigned short polar;
+	unsigned short dummy14;
+	unsigned short edge;
+	unsigned short dummy15;
+	unsigned short both;
+	unsigned short dummy16;
+	unsigned short inen;
+};
+
+#ifdef CONFIG_PM
+#define PM_WAKE_RISING	0x1
+#define PM_WAKE_FALLING	0x2
+#define PM_WAKE_HIGH	0x4
+#define PM_WAKE_LOW	0x8
+#define PM_WAKE_BOTH_EDGES	(PM_WAKE_RISING | PM_WAKE_FALLING)
+
+int gpio_pm_wakeup_request(unsigned short gpio, unsigned char type);
+void gpio_pm_wakeup_free(unsigned short gpio);
+unsigned int gpio_pm_setup(void);
+void gpio_pm_restore(void);
+
+struct gpio_port_s {
+	unsigned short data;
+	unsigned short data_clear;
+	unsigned short data_set;
+	unsigned short toggle;
+	unsigned short maska;
+	unsigned short maska_clear;
+	unsigned short maska_set;
+	unsigned short maska_toggle;
+	unsigned short maskb;
+	unsigned short maskb_clear;
+	unsigned short maskb_set;
+	unsigned short maskb_toggle;
+	unsigned short dir;
+	unsigned short polar;
+	unsigned short edge;
+	unsigned short both;
+	unsigned short inen;
+
+	unsigned short fer;
+};
+#endif /*CONFIG_PM*/
+
+/***********************************************************
+*
+* FUNCTIONS: Blackfin GPIO Driver
+*
+* INPUTS/OUTPUTS:
+* gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
+*
+*
+* DESCRIPTION: Blackfin GPIO Driver API
+*
+* CAUTION:
+*************************************************************
+* MODIFICATION HISTORY :
+**************************************************************/
+
+int gpio_request(unsigned short, const char *);
+void gpio_free(unsigned short);
+
+void gpio_set_value(unsigned short gpio, unsigned short arg);
+unsigned short gpio_get_value(unsigned short gpio);
+
+#define gpio_get_value(gpio) 		get_gpio_data(gpio)
+#define gpio_set_value(gpio, value)	set_gpio_data(gpio, value)
+
+void gpio_direction_input(unsigned short gpio);
+void gpio_direction_output(unsigned short gpio);
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __ARCH_BLACKFIN_GPIO_H__ */