WebSVN – HelenOS – Blame – /branches/sparc/uspace/srv/kbd/arch/sparc64/src/sgcn.c

Rev	Author	Line No.	Line
3549	rimsky	1	/*
		2	* Copyright (c) 2008 Pavel Rimsky
		3	* All rights reserved.
		4	*
		5	* Redistribution and use in source and binary forms, with or without
		6	* modification, are permitted provided that the following conditions
		7	* are met:
		8	*
		9	* - Redistributions of source code must retain the above copyright
		10	* notice, this list of conditions and the following disclaimer.
		11	* - Redistributions in binary form must reproduce the above copyright
		12	* notice, this list of conditions and the following disclaimer in the
		13	* documentation and/or other materials provided with the distribution.
		14	* - The name of the author may not be used to endorse or promote products
		15	* derived from this software without specific prior written permission.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
		18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
		19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
		20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
		21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
		22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
		26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*/
		28
		29	/** @addtogroup kbdsparc64 sparc64
		30	* @brief Serengeti-specific parts of uspace keyboard handler.
		31	* @ingroup kbd
		32	* @{
		33	*/
		34	/** @file
		35	*/
		36
		37	#include <arch/sgcn.h>
		38	#include <as.h>
		39	#include <ddi.h>
		40	#include <ipc/ipc.h>
		41	#include <kbd.h>
		42	#include <genarch/nofb.h>
		43	#include <genarch/kbd.h>
		44	#include <sysinfo.h>
		45	#include <stdio.h>
		46	#include <futex.h>
		47
		48	/**
		49	* SGCN buffer header. It is placed at the very beginning of the SGCN
		50	* buffer.
		51	*/
		52	typedef struct {
		53	/** hard-wired to "CON" */
		54	char magic[4];
		55
		56	/** we don't need this */
		57	char unused[8];
		58
		59	/** offset within the SGCN buffer of the input buffer start */
		60	uint32_t in_begin;
		61
		62	/** offset within the SGCN buffer of the input buffer end */
		63	uint32_t in_end;
		64
		65	/** offset within the SGCN buffer of the input buffer read pointer */
		66	uint32_t in_rdptr;
		67
		68	/** offset within the SGCN buffer of the input buffer write pointer */
		69	uint32_t in_wrptr;
		70
		71	/** offset within the SGCN buffer of the output buffer start */
		72	uint32_t out_begin;
		73
		74	/** offset within the SGCN buffer of the output buffer end */
		75	uint32_t out_end;
		76
		77	/** offset within the SGCN buffer of the output buffer read pointer */
		78	uint32_t out_rdptr;
		79
		80	/** offset within the SGCN buffer of the output buffer write pointer */
		81	uint32_t out_wrptr;
		82	} __attribute__ ((packed)) sgcn_buffer_header_t;
		83
		84	/*
		85	* Returns a pointer to the object of a given type which is placed at the given
		86	* offset from the console buffer beginning.
		87	*/
		88	#define SGCN_BUFFER(type, offset) \
		89	((type *) (sram_virt_addr + sram_buffer_offset + (offset)))
		90
		91	/** Returns a pointer to the console buffer header. */
		92	#define SGCN_BUFFER_HEADER (SGCN_BUFFER(sgcn_buffer_header_t, 0))
		93
		94	extern keybuffer_t keybuffer;
		95
		96	/**
		97	* Virtual address mapped to SRAM.
		98	*/
		99	static uintptr_t sram_virt_addr;
		100
		101	/**
		102	* SGCN buffer offset within SGCN.
		103	*/
		104	static uintptr_t sram_buffer_offset;
		105
		106	/**
		107	* Initializes the SGCN driver.
		108	* Maps the physical memory (SRAM) and registers the interrupt.
		109	*/
		110	void sgcn_init(void)
		111	{
		112	sram_virt_addr = (uintptr_t) as_get_mappable_page(sysinfo_value("sram.area.size"));
		113	int result = physmem_map(
		114	(void *) sysinfo_value("sram.address.physical"),
		115	(void *) sram_virt_addr,
		116	sysinfo_value("sram.area.size") / PAGE_SIZE,
		117	AS_AREA_READ \| AS_AREA_WRITE
		118	);
		119	if (result != 0) {
		120	printf("SGCN: uspace driver could not map physical memory.");
		121	}
		122
		123	sram_buffer_offset = sysinfo_value("sram.buffer.offset");
		124	ipc_register_irq(sysinfo_value("kbd.inr"), sysinfo_value("kbd.devno"),
		125	0, (void *) 0);
		126	}
		127
		128
		129
		130	/**
		131	* Handler of the "key pressed" event. Reads codes of all the pressed keys from
		132	* the buffer.
		133	*/
		134	void sgcn_key_pressed(void)
		135	{
		136	char c;
		137
		138	uint32_t begin = SGCN_BUFFER_HEADER->in_begin;
		139	uint32_t end = SGCN_BUFFER_HEADER->in_end;
		140	uint32_t size = end - begin;
		141
		142	volatile char buf_ptr = (volatile char )
		143	SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr);
		144	volatile uint32_t *in_wrptr_ptr = &(SGCN_BUFFER_HEADER->in_wrptr);
		145	volatile uint32_t *in_rdptr_ptr = &(SGCN_BUFFER_HEADER->in_rdptr);
		146
		147	while (in_rdptr_ptr != in_wrptr_ptr) {
		148	c = *buf_ptr;
		149	in_rdptr_ptr = (((in_rdptr_ptr) - begin + 1) % size) + begin;
		150	buf_ptr = (volatile char *)
		151	SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr);
		152	printf("Pressed character %c.\n", c);
		153	if (c == '\r') {
		154	c = '\n';
		155	}
		156	//keybuffer_push(&keybuffer, c);
		157	kbd_process_no_fb(&keybuffer, c);
		158	}
		159	}
		160
		161	/** @}
		162	*/

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(root)/branches/sparc/uspace/srv/kbd/arch/sparc64/src/sgcn.c – Rev 3551