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kernel
os
linux
[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>
authored by
Sylvain Munaut
and committed by
Grant Likely
9ea68df5
2f9ea1bd
+267
+7
arch/powerpc/sysdev/bestcomm/Kconfig
+7
arch/powerpc/sysdev/bestcomm/Kconfig
+2
arch/powerpc/sysdev/bestcomm/Makefile
+2
arch/powerpc/sysdev/bestcomm/Makefile
+154
arch/powerpc/sysdev/bestcomm/ata.c
+154
arch/powerpc/sysdev/bestcomm/ata.c
···
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/*
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* Bestcomm ATA task driver
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*
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*
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* Patterned after bestcomm/fec.c by Dale Farnsworth <dfarnsworth@mvista.com>
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* 2003-2004 (c) MontaVista, Software, Inc.
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*
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* Copyright (C) 2006-2007 Sylvain Munaut <tnt@246tNt.com>
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* Copyright (C) 2006 Freescale - John Rigby
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <asm/io.h>
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#include "bestcomm.h"
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#include "bestcomm_priv.h"
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#include "ata.h"
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/* ======================================================================== */
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/* Task image/var/inc */
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/* ======================================================================== */
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/* ata task image */
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extern u32 bcom_ata_task[];
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/* ata task vars that need to be set before enabling the task */
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struct bcom_ata_var {
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u32 enable; /* (u16*) address of task's control register */
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u32 bd_base; /* (struct bcom_bd*) beginning of ring buffer */
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u32 bd_last; /* (struct bcom_bd*) end of ring buffer */
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u32 bd_start; /* (struct bcom_bd*) current bd */
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u32 buffer_size; /* size of receive buffer */
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};
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/* ata task incs that need to be set before enabling the task */
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struct bcom_ata_inc {
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u16 pad0;
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s16 incr_bytes;
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u16 pad1;
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s16 incr_dst;
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u16 pad2;
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s16 incr_src;
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};
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/* ======================================================================== */
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/* Task support code */
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/* ======================================================================== */
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struct bcom_task *
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bcom_ata_init(int queue_len, int maxbufsize)
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{
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struct bcom_task *tsk;
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struct bcom_ata_var *var;
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struct bcom_ata_inc *inc;
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tsk = bcom_task_alloc(queue_len, sizeof(struct bcom_ata_bd), 0);
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if (!tsk)
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return NULL;
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tsk->flags = BCOM_FLAGS_NONE;
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bcom_ata_reset_bd(tsk);
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var = (struct bcom_ata_var *) bcom_task_var(tsk->tasknum);
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inc = (struct bcom_ata_inc *) bcom_task_inc(tsk->tasknum);
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if (bcom_load_image(tsk->tasknum, bcom_ata_task)) {
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bcom_task_free(tsk);
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return NULL;
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}
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var->enable = bcom_eng->regs_base +
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offsetof(struct mpc52xx_sdma, tcr[tsk->tasknum]);
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var->bd_base = tsk->bd_pa;
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var->bd_last = tsk->bd_pa + ((tsk->num_bd-1) * tsk->bd_size);
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var->bd_start = tsk->bd_pa;
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var->buffer_size = maxbufsize;
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/* Configure some stuff */
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bcom_set_task_pragma(tsk->tasknum, BCOM_ATA_PRAGMA);
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bcom_set_task_auto_start(tsk->tasknum, tsk->tasknum);
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out_8(&bcom_eng->regs->ipr[BCOM_INITIATOR_ATA_RX], BCOM_IPR_ATA_RX);
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out_8(&bcom_eng->regs->ipr[BCOM_INITIATOR_ATA_TX], BCOM_IPR_ATA_TX);
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out_be32(&bcom_eng->regs->IntPend, 1<<tsk->tasknum); /* Clear ints */
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return tsk;
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}
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EXPORT_SYMBOL_GPL(bcom_ata_init);
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void bcom_ata_rx_prepare(struct bcom_task *tsk)
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{
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struct bcom_ata_inc *inc;
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inc = (struct bcom_ata_inc *) bcom_task_inc(tsk->tasknum);
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inc->incr_bytes = -(s16)sizeof(u32);
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inc->incr_src = 0;
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inc->incr_dst = sizeof(u32);
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bcom_set_initiator(tsk->tasknum, BCOM_INITIATOR_ATA_RX);
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}
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EXPORT_SYMBOL_GPL(bcom_ata_rx_prepare);
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void bcom_ata_tx_prepare(struct bcom_task *tsk)
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{
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struct bcom_ata_inc *inc;
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inc = (struct bcom_ata_inc *) bcom_task_inc(tsk->tasknum);
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inc->incr_bytes = -(s16)sizeof(u32);
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inc->incr_src = sizeof(u32);
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inc->incr_dst = 0;
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bcom_set_initiator(tsk->tasknum, BCOM_INITIATOR_ATA_TX);
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}
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EXPORT_SYMBOL_GPL(bcom_ata_tx_prepare);
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void bcom_ata_reset_bd(struct bcom_task *tsk)
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{
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struct bcom_ata_var *var;
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/* Reset all BD */
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memset(tsk->bd, 0x00, tsk->num_bd * tsk->bd_size);
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tsk->index = 0;
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tsk->outdex = 0;
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var = (struct bcom_ata_var *) bcom_task_var(tsk->tasknum);
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var->bd_start = var->bd_base;
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}
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EXPORT_SYMBOL_GPL(bcom_ata_reset_bd);
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void bcom_ata_release(struct bcom_task *tsk)
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{
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/* Nothing special for the ATA tasks */
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bcom_task_free(tsk);
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}
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EXPORT_SYMBOL_GPL(bcom_ata_release);
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MODULE_DESCRIPTION("BestComm ATA task driver");
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MODULE_AUTHOR("John Rigby");
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MODULE_LICENSE("GPL v2");
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+37
arch/powerpc/sysdev/bestcomm/ata.h
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arch/powerpc/sysdev/bestcomm/ata.h
···
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/*
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* Header for Bestcomm ATA task driver
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*
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*
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* Copyright (C) 2006 Freescale - John Rigby
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* Copyright (C) 2006 Sylvain Munaut <tnt@246tNt.com>
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*/
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#ifndef __BESTCOMM_ATA_H__
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#define __BESTCOMM_ATA_H__
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struct bcom_ata_bd {
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u32 status;
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u32 dst_pa;
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u32 src_pa;
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};
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extern struct bcom_task *
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bcom_ata_init(int queue_len, int maxbufsize);
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extern void
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bcom_ata_rx_prepare(struct bcom_task *tsk);
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extern void
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bcom_ata_tx_prepare(struct bcom_task *tsk);
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extern void
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bcom_ata_reset_bd(struct bcom_task *tsk);
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#endif /* __BESTCOMM_ATA_H__ */
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+67
arch/powerpc/sysdev/bestcomm/bcom_ata_task.c
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arch/powerpc/sysdev/bestcomm/bcom_ata_task.c
···
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/*
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* Bestcomm ATA task microcode
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*
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* Copyright (c) 2004 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* Created based on bestcom/code_dma/image_rtos1/dma_image.hex
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*/
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#include <asm/types.h>
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/*
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* The header consists of the following fields:
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* u32 magic;
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* u8 desc_size;
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* u8 var_size;
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* u8 inc_size;
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* u8 first_var;
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* u8 reserved[8];
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*
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* The size fields contain the number of 32-bit words.
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*/
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u32 bcom_ata_task[] = {
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/* header */
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0x4243544b,
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0x0e060709,
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0x00000000,
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0x00000000,
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/* Task descriptors */
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0x8198009b, /* LCD: idx0 = var3; idx0 <= var2; idx0 += inc3 */
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0x13e00c08, /* DRD1A: var3 = var1; FN=0 MORE init=31 WS=0 RS=0 */
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0xb8000264, /* LCD: idx1 = *idx0, idx2 = var0; idx1 < var9; idx1 += inc4, idx2 += inc4 */
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0x10000f00, /* DRD1A: var3 = idx0; FN=0 MORE init=0 WS=0 RS=0 */
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0x60140002, /* DRD2A: EU0=0 EU1=0 EU2=0 EU3=2 EXT init=0 WS=2 RS=2 */
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0x0c8cfc8a, /* DRD2B1: *idx2 = EU3(); EU3(*idx2,var10) */
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0xd8988240, /* LCDEXT: idx1 = idx1; idx1 > var9; idx1 += inc0 */
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0xf845e011, /* LCDEXT: idx2 = *(idx0 + var00000015); ; idx2 += inc2 */
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0xb845e00a, /* LCD: idx3 = *(idx0 + var00000019); ; idx3 += inc1 */
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0x0bfecf90, /* DRD1A: *idx3 = *idx2; FN=0 TFD init=31 WS=3 RS=3 */
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0x9898802d, /* LCD: idx1 = idx1; idx1 once var0; idx1 += inc5 */
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0x64000005, /* DRD2A: EU0=0 EU1=0 EU2=0 EU3=5 INT EXT init=0 WS=0 RS=0 */
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0x0c0cf849, /* DRD2B1: *idx0 = EU3(); EU3(idx1,var9) */
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0x000001f8, /* NOP */
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/* VAR[9]-VAR[14] */
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0x40000000,
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0x7fff7fff,
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0x00000000,
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0x00000000,
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0x00000000,
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0x00000000,
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/* INC[0]-INC[6] */
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0x40000000,
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0xe0000000,
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0xe0000000,
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0xa000000c,
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0x20000000,
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0x00000000,
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0x00000000,
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};
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