[POWERPC] bestcomm: ATA task support (9ea68df5) · Commits · e / devices / android_kernel_oneplus_sm8150

arch/powerpc/sysdev/bestcomm/Kconfig

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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.

arch/powerpc/sysdev/bestcomm/Makefile

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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

arch/powerpc/sysdev/bestcomm/ata.c

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		/*
		* 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");

arch/powerpc/sysdev/bestcomm/ata.h

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		/*
		* 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__ */

arch/powerpc/sysdev/bestcomm/bcom_ata_task.c

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		/*
		* 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,
		};