[POWERPC] bestcomm: ATA task support

This is the microcode for the ATA task and the associated
support code.

The microcode itself comes directly from the offical
API (v2.2)

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Sylvain Munaut 2007-09-16 20:53:28 +10:00 коммит произвёл Grant Likely
Родитель 2f9ea1bde0
Коммит 9ea68df515
5 изменённых файлов: 267 добавлений и 0 удалений

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@ -16,3 +16,10 @@ config PPC_BESTCOMM
If you want to use drivers that require DMA operations,
answer Y or M. Otherwise say N.
config PPC_BESTCOMM_ATA
tristate "Bestcomm ATA task support"
depends on PPC_BESTCOMM
default n
help
This option enables the support for the ATA task.

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@ -3,6 +3,8 @@
#
bestcomm-core-objs := bestcomm.o sram.o
bestcomm-ata-objs := ata.o bcom_ata_task.o
obj-$(CONFIG_PPC_BESTCOMM) += bestcomm-core.o
obj-$(CONFIG_PPC_BESTCOMM_ATA) += bestcomm-ata.o

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@ -0,0 +1,154 @@
/*
* Bestcomm ATA task driver
*
*
* Patterned after bestcomm/fec.c by Dale Farnsworth <dfarnsworth@mvista.com>
* 2003-2004 (c) MontaVista, Software, Inc.
*
* Copyright (C) 2006-2007 Sylvain Munaut <tnt@246tNt.com>
* Copyright (C) 2006 Freescale - John Rigby
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <asm/io.h>
#include "bestcomm.h"
#include "bestcomm_priv.h"
#include "ata.h"
/* ======================================================================== */
/* Task image/var/inc */
/* ======================================================================== */
/* ata task image */
extern u32 bcom_ata_task[];
/* ata task vars that need to be set before enabling the task */
struct bcom_ata_var {
u32 enable; /* (u16*) address of task's control register */
u32 bd_base; /* (struct bcom_bd*) beginning of ring buffer */
u32 bd_last; /* (struct bcom_bd*) end of ring buffer */
u32 bd_start; /* (struct bcom_bd*) current bd */
u32 buffer_size; /* size of receive buffer */
};
/* ata task incs that need to be set before enabling the task */
struct bcom_ata_inc {
u16 pad0;
s16 incr_bytes;
u16 pad1;
s16 incr_dst;
u16 pad2;
s16 incr_src;
};
/* ======================================================================== */
/* Task support code */
/* ======================================================================== */
struct bcom_task *
bcom_ata_init(int queue_len, int maxbufsize)
{
struct bcom_task *tsk;
struct bcom_ata_var *var;
struct bcom_ata_inc *inc;
tsk = bcom_task_alloc(queue_len, sizeof(struct bcom_ata_bd), 0);
if (!tsk)
return NULL;
tsk->flags = BCOM_FLAGS_NONE;
bcom_ata_reset_bd(tsk);
var = (struct bcom_ata_var *) bcom_task_var(tsk->tasknum);
inc = (struct bcom_ata_inc *) bcom_task_inc(tsk->tasknum);
if (bcom_load_image(tsk->tasknum, bcom_ata_task)) {
bcom_task_free(tsk);
return NULL;
}
var->enable = bcom_eng->regs_base +
offsetof(struct mpc52xx_sdma, tcr[tsk->tasknum]);
var->bd_base = tsk->bd_pa;
var->bd_last = tsk->bd_pa + ((tsk->num_bd-1) * tsk->bd_size);
var->bd_start = tsk->bd_pa;
var->buffer_size = maxbufsize;
/* Configure some stuff */
bcom_set_task_pragma(tsk->tasknum, BCOM_ATA_PRAGMA);
bcom_set_task_auto_start(tsk->tasknum, tsk->tasknum);
out_8(&bcom_eng->regs->ipr[BCOM_INITIATOR_ATA_RX], BCOM_IPR_ATA_RX);
out_8(&bcom_eng->regs->ipr[BCOM_INITIATOR_ATA_TX], BCOM_IPR_ATA_TX);
out_be32(&bcom_eng->regs->IntPend, 1<<tsk->tasknum); /* Clear ints */
return tsk;
}
EXPORT_SYMBOL_GPL(bcom_ata_init);
void bcom_ata_rx_prepare(struct bcom_task *tsk)
{
struct bcom_ata_inc *inc;
inc = (struct bcom_ata_inc *) bcom_task_inc(tsk->tasknum);
inc->incr_bytes = -(s16)sizeof(u32);
inc->incr_src = 0;
inc->incr_dst = sizeof(u32);
bcom_set_initiator(tsk->tasknum, BCOM_INITIATOR_ATA_RX);
}
EXPORT_SYMBOL_GPL(bcom_ata_rx_prepare);
void bcom_ata_tx_prepare(struct bcom_task *tsk)
{
struct bcom_ata_inc *inc;
inc = (struct bcom_ata_inc *) bcom_task_inc(tsk->tasknum);
inc->incr_bytes = -(s16)sizeof(u32);
inc->incr_src = sizeof(u32);
inc->incr_dst = 0;
bcom_set_initiator(tsk->tasknum, BCOM_INITIATOR_ATA_TX);
}
EXPORT_SYMBOL_GPL(bcom_ata_tx_prepare);
void bcom_ata_reset_bd(struct bcom_task *tsk)
{
struct bcom_ata_var *var;
/* Reset all BD */
memset(tsk->bd, 0x00, tsk->num_bd * tsk->bd_size);
tsk->index = 0;
tsk->outdex = 0;
var = (struct bcom_ata_var *) bcom_task_var(tsk->tasknum);
var->bd_start = var->bd_base;
}
EXPORT_SYMBOL_GPL(bcom_ata_reset_bd);
void bcom_ata_release(struct bcom_task *tsk)
{
/* Nothing special for the ATA tasks */
bcom_task_free(tsk);
}
EXPORT_SYMBOL_GPL(bcom_ata_release);
MODULE_DESCRIPTION("BestComm ATA task driver");
MODULE_AUTHOR("John Rigby");
MODULE_LICENSE("GPL v2");

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@ -0,0 +1,37 @@
/*
* Header for Bestcomm ATA task driver
*
*
* Copyright (C) 2006 Freescale - John Rigby
* Copyright (C) 2006 Sylvain Munaut <tnt@246tNt.com>
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#ifndef __BESTCOMM_ATA_H__
#define __BESTCOMM_ATA_H__
struct bcom_ata_bd {
u32 status;
u32 dst_pa;
u32 src_pa;
};
extern struct bcom_task *
bcom_ata_init(int queue_len, int maxbufsize);
extern void
bcom_ata_rx_prepare(struct bcom_task *tsk);
extern void
bcom_ata_tx_prepare(struct bcom_task *tsk);
extern void
bcom_ata_reset_bd(struct bcom_task *tsk);
#endif /* __BESTCOMM_ATA_H__ */

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@ -0,0 +1,67 @@
/*
* Bestcomm ATA task microcode
*
* Copyright (c) 2004 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
* Created based on bestcom/code_dma/image_rtos1/dma_image.hex
*/
#include <asm/types.h>
/*
* The header consists of the following fields:
* u32 magic;
* u8 desc_size;
* u8 var_size;
* u8 inc_size;
* u8 first_var;
* u8 reserved[8];
*
* The size fields contain the number of 32-bit words.
*/
u32 bcom_ata_task[] = {
/* header */
0x4243544b,
0x0e060709,
0x00000000,
0x00000000,
/* Task descriptors */
0x8198009b, /* LCD: idx0 = var3; idx0 <= var2; idx0 += inc3 */
0x13e00c08, /* DRD1A: var3 = var1; FN=0 MORE init=31 WS=0 RS=0 */
0xb8000264, /* LCD: idx1 = *idx0, idx2 = var0; idx1 < var9; idx1 += inc4, idx2 += inc4 */
0x10000f00, /* DRD1A: var3 = idx0; FN=0 MORE init=0 WS=0 RS=0 */
0x60140002, /* DRD2A: EU0=0 EU1=0 EU2=0 EU3=2 EXT init=0 WS=2 RS=2 */
0x0c8cfc8a, /* DRD2B1: *idx2 = EU3(); EU3(*idx2,var10) */
0xd8988240, /* LCDEXT: idx1 = idx1; idx1 > var9; idx1 += inc0 */
0xf845e011, /* LCDEXT: idx2 = *(idx0 + var00000015); ; idx2 += inc2 */
0xb845e00a, /* LCD: idx3 = *(idx0 + var00000019); ; idx3 += inc1 */
0x0bfecf90, /* DRD1A: *idx3 = *idx2; FN=0 TFD init=31 WS=3 RS=3 */
0x9898802d, /* LCD: idx1 = idx1; idx1 once var0; idx1 += inc5 */
0x64000005, /* DRD2A: EU0=0 EU1=0 EU2=0 EU3=5 INT EXT init=0 WS=0 RS=0 */
0x0c0cf849, /* DRD2B1: *idx0 = EU3(); EU3(idx1,var9) */
0x000001f8, /* NOP */
/* VAR[9]-VAR[14] */
0x40000000,
0x7fff7fff,
0x00000000,
0x00000000,
0x00000000,
0x00000000,
/* INC[0]-INC[6] */
0x40000000,
0xe0000000,
0xe0000000,
0xa000000c,
0x20000000,
0x00000000,
0x00000000,
};