Makefile.shared

/*
 * Device driver for the PMU on 68K-based Apple PowerBooks
 *
 * The VIA (versatile interface adapter) interfaces to the PMU,
 * a 6805 microprocessor core whose primary function is to control
 * battery charging and system power on the PowerBooks.
 * The PMU also controls the ADB (Apple Desktop Bus) which connects
 * to the keyboard and mouse, as well as the non-volatile RAM
 * and the RTC (real time clock) chip.
 *
 * Adapted for 68K PMU by Joshua M. Thompson
 *
 * Based largely on the PowerMac PMU code by Paul Mackerras and
 * Fabio Riccardi.
 *
 * Also based on the PMU driver from MkLinux by Apple Computer, Inc.
 * and the Open Software Foundation, Inc.
 */

#include <stdarg.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/miscdevice.h>
#include <linux/blkdev.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/interrupt.h>

#include <linux/adb.h>
#include <linux/pmu.h>
#include <linux/cuda.h>

#include <asm/macintosh.h>
#include <asm/macints.h>
#include <asm/mac_via.h>

#include <asm/pgtable.h>
#include <asm/irq.h>
#include <asm/uaccess.h>

/* Misc minor number allocated for /dev/pmu */
#define PMU_MINOR	154

/* VIA registers - spaced 0x200 bytes apart */
#define RS		0x200		/* skip between registers */
#define B		0		/* B-side data */
#define A		RS		/* A-side data */
#define DIRB		(2*RS)		/* B-side direction (1=output) */
#define DIRA		(3*RS)		/* A-side direction (1=output) */
#define T1CL		(4*RS)		/* Timer 1 ctr/latch (low 8 bits) */
#define T1CH		(5*RS)		/* Timer 1 counter (high 8 bits) */
#define T1LL		(6*RS)		/* Timer 1 latch (low 8 bits) */
#define T1LH		(7*RS)		/* Timer 1 latch (high 8 bits) */
#define T2CL		(8*RS)		/* Timer 2 ctr/latch (low 8 bits) */
#define T2CH		(9*RS)		/* Timer 2 counter (high 8 bits) */
#define SR		(10*RS)		/* Shift register */
#define ACR		(11*RS)		/* Auxiliary control register */
#define PCR		(12*RS)		/* Peripheral control register */
#define IFR		(13*RS)		/* Interrupt flag register */
#define IER		(14*RS)		/* Interrupt enable register */
#define ANH		(15*RS)		/* A-side data, no handshake */

/* Bits in B data register: both active low */
#define TACK		0x02		/* Transfer acknowledge (input) */
#define TREQ		0x04		/* Transfer request (output) */

/* Bits in ACR */
#define SR_CTRL		0x1c		/* Shift register control bits */
#define SR_EXT		0x0c		/* Shift on external clock */
#define SR_OUT		0x10		/* Shift out if 1 */

/* Bits in IFR and IER */
#define SR_INT		0x04		/* Shift register full/empty */
#define CB1_INT		0x10		/* transition on CB1 input */

static enum pmu_state {
	idle,
	sending,
	intack,
	reading,
	reading_intr,
} pmu_state;

static struct adb_request *current_req;
static struct adb_request *last_req;
static struct adb_request *req_awaiting_reply;
static unsigned char interrupt_data[32];
static unsigned char *reply_ptr;
static int data_index;
static int data_len;
static int adb_int_pending;
static int pmu_adb_flags;
static int adb_dev_map;
static struct adb_request bright_req_1, bright_req_2, bright_req_3;
static int pmu_kind = PMU_UNKNOWN;
static int pmu_fully_inited;

int asleep;

static int pmu_probe(void);
static int pmu_init(void);
static void pmu_start(void);
static irqreturn_t pmu_interrupt(int irq, void *arg);
static int pmu_send_request(struct adb_request *req, int sync);
static int pmu_autopoll(int devs);
void pmu_poll(void);
static int pmu_reset_bus(void);

static void pmu_start(void);
static void send_byte(int x);
static void recv_byte(void);
static void pmu_done(struct adb_request *req);
static void pmu_handle_data(unsigned char *data, int len);
static void set_volume(int level);
static void pmu_enable_backlight(int on);
static void pmu_set_brightness(int level);

struct adb_driver via_pmu_driver = {
	"68K PMU",
	pmu_probe,
	pmu_init,
	pmu_send_request,
	pmu_autopoll,
	pmu_poll,
	pmu_reset_bus
};

/*
 * This table indicates for each PMU opcode:
 * - the number of data bytes to be sent with the command, or -1
 *   if a length byte should be sent,
 * - the number of response bytes which the PMU will return, or
 *   -1 if it will send a length byte.
 */
static s8 pmu_data_len[256][2] = {
/*	   0	   1	   2	   3	   4	   5	   6	   7  */
/*00*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*08*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
/*10*/	{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*18*/	{ 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
/*20*/	{-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
/*28*/	{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
/*30*/	{ 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*38*/	{ 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
/*40*/	{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*48*/	{ 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
/*50*/	{ 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
/*58*/	{ 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
/*60*/	{ 2, 0},{-1, 0},{-1, 0
Age	Commit message (Expand)	Author
2010-08-21	Makefile.share: fix brown-bag typo in link_o.darwin.	Andy Polyakov
2010-07-16	Makefile.shared: link_o.darwin comment update.	Andy Polyakov
2010-07-15	Makefile.shared: debugging line slipped through in previous commit.	Andy Polyakov
2010-07-15	Makefile.shared: update link_o.dawrin rule.	Andy Polyakov
2009-10-15	Fixes to CROSS_COMPILE, don't override command line option from environment	Dr. Stephen Henson
2009-08-10	PR: 2003	Dr. Stephen Henson
2009-01-02	Makefile.shared: improve portability of commit#17753.	Andy Polyakov
2008-12-30	Styling update to makefiles: eliminate redundant pipes.	Andy Polyakov
2008-12-29	Styling update to makefiles: $() to denote make substitutions and $${} -	Andy Polyakov
2008-09-12	AIX build updates.	Andy Polyakov
2008-04-17	Apply mingw patches as supplied by Roumen Petrov an Alon Bar-Lev	Lutz Jänicke
2007-09-16	Minor fix in link_[oa].hpux.	Andy Polyakov
2007-08-26	IRIX and Tru64 platform updates.	Andy Polyakov
2007-07-31	Proper support for shared build under MacOS X.	Andy Polyakov
2007-05-19	--enable-auto-image-base in cygwin build.	Andy Polyakov
2007-03-25	Allow shared builds for aix[64]-gcc targets.	Andy Polyakov
2007-03-22	Fixes for aix-shared rules.	Andy Polyakov
2006-10-24	Further mingw build procedure updates.	Andy Polyakov
2006-10-23	Harmonize dll naming in mingw builds.	Andy Polyakov
2006-10-23	Allow for mingw cross-compile configuration.	Andy Polyakov
2006-10-21	Rudimentary support for cross-compiling.	Andy Polyakov
2006-05-20	Tiny up hpux targets.	Andy Polyakov
2006-04-11	Add BeOS support.	Ulf Möller
2005-12-16	Fix typos in osf1 shared rules.	Andy Polyakov
2005-11-09	AIX -blibpath is not accumulative, one apparently has to specify even	Andy Polyakov
2005-10-28	Add -install_name in link_a.darwin rule.	Andy Polyakov
2005-10-25	Fix install problems on MacOS X and HP-UX.	Andy Polyakov
2005-06-23	Darwin specific update for Configure and Makefile.shared.	Andy Polyakov
2005-06-23	HP-UX specific updates to Makefile.org and Makefile.shared.	Andy Polyakov
2005-06-22	Solaris-specific Makefile.shared update from 098.	Andy Polyakov
2005-05-21	Patches for Cygwin, provided by Corinna Vinschen <vinschen@redhat.com>	Richard Levitte
2005-05-16	Improve shell portability of new rules in Makefile.shared.	Andy Polyakov
2005-05-16	Make Makefile.shared quiet again.	Andy Polyakov
2005-05-15	Simplify shared rules, link run-path into applications only.	Andy Polyakov
2005-04-30	Cygwin/mingw sync with stable.	Andy Polyakov
2005-04-13	Parameterize do_solaris rules in Makefile.shared.	Andy Polyakov
2005-04-04	Extend Solaris x86 support to amd64.	Andy Polyakov
2005-03-31	Get rid of irritating noise.	Ben Laurie
2005-02-06	Make Makefile.shared BSD make-friendly, remove more redundant -lc, set up	Andy Polyakov
2005-02-03	Drop redundant -lc from a number of rules in Makefile.shared. It's	Andy Polyakov
2005-01-26	The mix of CFLAGS and LDFLAGS is a bit confusing in my opinion, and	Richard Levitte
2004-12-27	As new major IRIX release is highly unlikely to appear [and break following],	Andy Polyakov
2004-09-28	Fix Solaris 10_x86 shared build. -Bsymbolic is required to avoid	Andy Polyakov
2004-08-29	Proper support for OpenBSD-i386 shared build, including assember modules!	Andy Polyakov
2004-08-01	Clean-up GAS targets: get rid of "cpp" stuff and replace it with "purified"	Andy Polyakov
2004-07-24	Minor HP-UX make update. IA-64-based HP-UX favor .so extension for shared	Andy Polyakov
2004-07-18	Add anchors for AES, SHA-256/-512 assembler modules and SSE2 code pathes.	Andy Polyakov
2004-05-31	Minimal work-around for ./engine shared builds. "Minimal" means that I	Andy Polyakov
2004-05-31	32-bit PA-RISC requires -Bsymbolic when linking libcrypto.sl. Without	Andy Polyakov
2004-05-31	Working on HP-UX shared support...	Andy Polyakov