![Lucas De Marchi](/assets/img/avatar_default.png)
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
1715 lines
46 KiB
C
1715 lines
46 KiB
C
/*
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* File: drivers/ata/pata_bf54x.c
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* Author: Sonic Zhang <sonic.zhang@analog.com>
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*
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* Created:
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* Description: PATA Driver for blackfin 54x
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*
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* Modified:
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* Copyright 2007 Analog Devices Inc.
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*
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* Bugs: Enter bugs at http://blackfin.uclinux.org/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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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/pci.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <scsi/scsi_host.h>
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#include <linux/libata.h>
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#include <linux/platform_device.h>
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#include <asm/dma.h>
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#include <asm/gpio.h>
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#include <asm/portmux.h>
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#define DRV_NAME "pata-bf54x"
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#define DRV_VERSION "0.9"
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#define ATA_REG_CTRL 0x0E
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#define ATA_REG_ALTSTATUS ATA_REG_CTRL
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/* These are the offset of the controller's registers */
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#define ATAPI_OFFSET_CONTROL 0x00
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#define ATAPI_OFFSET_STATUS 0x04
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#define ATAPI_OFFSET_DEV_ADDR 0x08
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#define ATAPI_OFFSET_DEV_TXBUF 0x0c
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#define ATAPI_OFFSET_DEV_RXBUF 0x10
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#define ATAPI_OFFSET_INT_MASK 0x14
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#define ATAPI_OFFSET_INT_STATUS 0x18
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#define ATAPI_OFFSET_XFER_LEN 0x1c
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#define ATAPI_OFFSET_LINE_STATUS 0x20
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#define ATAPI_OFFSET_SM_STATE 0x24
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#define ATAPI_OFFSET_TERMINATE 0x28
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#define ATAPI_OFFSET_PIO_TFRCNT 0x2c
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#define ATAPI_OFFSET_DMA_TFRCNT 0x30
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#define ATAPI_OFFSET_UMAIN_TFRCNT 0x34
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#define ATAPI_OFFSET_UDMAOUT_TFRCNT 0x38
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#define ATAPI_OFFSET_REG_TIM_0 0x40
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#define ATAPI_OFFSET_PIO_TIM_0 0x44
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#define ATAPI_OFFSET_PIO_TIM_1 0x48
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#define ATAPI_OFFSET_MULTI_TIM_0 0x50
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#define ATAPI_OFFSET_MULTI_TIM_1 0x54
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#define ATAPI_OFFSET_MULTI_TIM_2 0x58
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#define ATAPI_OFFSET_ULTRA_TIM_0 0x60
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#define ATAPI_OFFSET_ULTRA_TIM_1 0x64
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#define ATAPI_OFFSET_ULTRA_TIM_2 0x68
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#define ATAPI_OFFSET_ULTRA_TIM_3 0x6c
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#define ATAPI_GET_CONTROL(base)\
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bfin_read16(base + ATAPI_OFFSET_CONTROL)
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#define ATAPI_SET_CONTROL(base, val)\
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bfin_write16(base + ATAPI_OFFSET_CONTROL, val)
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#define ATAPI_GET_STATUS(base)\
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bfin_read16(base + ATAPI_OFFSET_STATUS)
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#define ATAPI_GET_DEV_ADDR(base)\
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bfin_read16(base + ATAPI_OFFSET_DEV_ADDR)
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#define ATAPI_SET_DEV_ADDR(base, val)\
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bfin_write16(base + ATAPI_OFFSET_DEV_ADDR, val)
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#define ATAPI_GET_DEV_TXBUF(base)\
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bfin_read16(base + ATAPI_OFFSET_DEV_TXBUF)
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#define ATAPI_SET_DEV_TXBUF(base, val)\
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bfin_write16(base + ATAPI_OFFSET_DEV_TXBUF, val)
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#define ATAPI_GET_DEV_RXBUF(base)\
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bfin_read16(base + ATAPI_OFFSET_DEV_RXBUF)
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#define ATAPI_SET_DEV_RXBUF(base, val)\
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bfin_write16(base + ATAPI_OFFSET_DEV_RXBUF, val)
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#define ATAPI_GET_INT_MASK(base)\
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bfin_read16(base + ATAPI_OFFSET_INT_MASK)
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#define ATAPI_SET_INT_MASK(base, val)\
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bfin_write16(base + ATAPI_OFFSET_INT_MASK, val)
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#define ATAPI_GET_INT_STATUS(base)\
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bfin_read16(base + ATAPI_OFFSET_INT_STATUS)
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#define ATAPI_SET_INT_STATUS(base, val)\
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bfin_write16(base + ATAPI_OFFSET_INT_STATUS, val)
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#define ATAPI_GET_XFER_LEN(base)\
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bfin_read16(base + ATAPI_OFFSET_XFER_LEN)
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#define ATAPI_SET_XFER_LEN(base, val)\
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bfin_write16(base + ATAPI_OFFSET_XFER_LEN, val)
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#define ATAPI_GET_LINE_STATUS(base)\
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bfin_read16(base + ATAPI_OFFSET_LINE_STATUS)
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#define ATAPI_GET_SM_STATE(base)\
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bfin_read16(base + ATAPI_OFFSET_SM_STATE)
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#define ATAPI_GET_TERMINATE(base)\
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bfin_read16(base + ATAPI_OFFSET_TERMINATE)
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#define ATAPI_SET_TERMINATE(base, val)\
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bfin_write16(base + ATAPI_OFFSET_TERMINATE, val)
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#define ATAPI_GET_PIO_TFRCNT(base)\
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bfin_read16(base + ATAPI_OFFSET_PIO_TFRCNT)
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#define ATAPI_GET_DMA_TFRCNT(base)\
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bfin_read16(base + ATAPI_OFFSET_DMA_TFRCNT)
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#define ATAPI_GET_UMAIN_TFRCNT(base)\
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bfin_read16(base + ATAPI_OFFSET_UMAIN_TFRCNT)
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#define ATAPI_GET_UDMAOUT_TFRCNT(base)\
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bfin_read16(base + ATAPI_OFFSET_UDMAOUT_TFRCNT)
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#define ATAPI_GET_REG_TIM_0(base)\
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bfin_read16(base + ATAPI_OFFSET_REG_TIM_0)
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#define ATAPI_SET_REG_TIM_0(base, val)\
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bfin_write16(base + ATAPI_OFFSET_REG_TIM_0, val)
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#define ATAPI_GET_PIO_TIM_0(base)\
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bfin_read16(base + ATAPI_OFFSET_PIO_TIM_0)
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#define ATAPI_SET_PIO_TIM_0(base, val)\
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bfin_write16(base + ATAPI_OFFSET_PIO_TIM_0, val)
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#define ATAPI_GET_PIO_TIM_1(base)\
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bfin_read16(base + ATAPI_OFFSET_PIO_TIM_1)
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#define ATAPI_SET_PIO_TIM_1(base, val)\
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bfin_write16(base + ATAPI_OFFSET_PIO_TIM_1, val)
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#define ATAPI_GET_MULTI_TIM_0(base)\
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bfin_read16(base + ATAPI_OFFSET_MULTI_TIM_0)
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#define ATAPI_SET_MULTI_TIM_0(base, val)\
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bfin_write16(base + ATAPI_OFFSET_MULTI_TIM_0, val)
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#define ATAPI_GET_MULTI_TIM_1(base)\
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bfin_read16(base + ATAPI_OFFSET_MULTI_TIM_1)
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#define ATAPI_SET_MULTI_TIM_1(base, val)\
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bfin_write16(base + ATAPI_OFFSET_MULTI_TIM_1, val)
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#define ATAPI_GET_MULTI_TIM_2(base)\
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bfin_read16(base + ATAPI_OFFSET_MULTI_TIM_2)
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#define ATAPI_SET_MULTI_TIM_2(base, val)\
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bfin_write16(base + ATAPI_OFFSET_MULTI_TIM_2, val)
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#define ATAPI_GET_ULTRA_TIM_0(base)\
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bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_0)
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#define ATAPI_SET_ULTRA_TIM_0(base, val)\
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bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_0, val)
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#define ATAPI_GET_ULTRA_TIM_1(base)\
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bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_1)
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#define ATAPI_SET_ULTRA_TIM_1(base, val)\
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bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_1, val)
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#define ATAPI_GET_ULTRA_TIM_2(base)\
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bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_2)
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#define ATAPI_SET_ULTRA_TIM_2(base, val)\
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bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_2, val)
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#define ATAPI_GET_ULTRA_TIM_3(base)\
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bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_3)
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#define ATAPI_SET_ULTRA_TIM_3(base, val)\
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bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_3, val)
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/**
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* PIO Mode - Frequency compatibility
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*/
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/* mode: 0 1 2 3 4 */
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static const u32 pio_fsclk[] =
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{ 33333333, 33333333, 33333333, 33333333, 33333333 };
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/**
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* MDMA Mode - Frequency compatibility
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*/
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/* mode: 0 1 2 */
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static const u32 mdma_fsclk[] = { 33333333, 33333333, 33333333 };
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/**
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* UDMA Mode - Frequency compatibility
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*
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* UDMA5 - 100 MB/s - SCLK = 133 MHz
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* UDMA4 - 66 MB/s - SCLK >= 80 MHz
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* UDMA3 - 44.4 MB/s - SCLK >= 50 MHz
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* UDMA2 - 33 MB/s - SCLK >= 40 MHz
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*/
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/* mode: 0 1 2 3 4 5 */
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static const u32 udma_fsclk[] =
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{ 33333333, 33333333, 40000000, 50000000, 80000000, 133333333 };
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/**
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* Register transfer timing table
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*/
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/* mode: 0 1 2 3 4 */
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/* Cycle Time */
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static const u32 reg_t0min[] = { 600, 383, 330, 180, 120 };
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/* DIOR/DIOW to end cycle */
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static const u32 reg_t2min[] = { 290, 290, 290, 70, 25 };
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/* DIOR/DIOW asserted pulse width */
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static const u32 reg_teocmin[] = { 290, 290, 290, 80, 70 };
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/**
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* PIO timing table
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*/
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/* mode: 0 1 2 3 4 */
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/* Cycle Time */
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static const u32 pio_t0min[] = { 600, 383, 240, 180, 120 };
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/* Address valid to DIOR/DIORW */
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static const u32 pio_t1min[] = { 70, 50, 30, 30, 25 };
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/* DIOR/DIOW to end cycle */
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static const u32 pio_t2min[] = { 165, 125, 100, 80, 70 };
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/* DIOR/DIOW asserted pulse width */
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static const u32 pio_teocmin[] = { 165, 125, 100, 70, 25 };
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/* DIOW data hold */
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static const u32 pio_t4min[] = { 30, 20, 15, 10, 10 };
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/* ******************************************************************
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* Multiword DMA timing table
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* ******************************************************************
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*/
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/* mode: 0 1 2 */
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/* Cycle Time */
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static const u32 mdma_t0min[] = { 480, 150, 120 };
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/* DIOR/DIOW asserted pulse width */
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static const u32 mdma_tdmin[] = { 215, 80, 70 };
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/* DMACK to read data released */
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static const u32 mdma_thmin[] = { 20, 15, 10 };
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/* DIOR/DIOW to DMACK hold */
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static const u32 mdma_tjmin[] = { 20, 5, 5 };
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/* DIOR negated pulse width */
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static const u32 mdma_tkrmin[] = { 50, 50, 25 };
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/* DIOR negated pulse width */
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static const u32 mdma_tkwmin[] = { 215, 50, 25 };
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/* CS[1:0] valid to DIOR/DIOW */
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static const u32 mdma_tmmin[] = { 50, 30, 25 };
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/* DMACK to read data released */
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static const u32 mdma_tzmax[] = { 20, 25, 25 };
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/**
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* Ultra DMA timing table
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*/
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/* mode: 0 1 2 3 4 5 */
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static const u32 udma_tcycmin[] = { 112, 73, 54, 39, 25, 17 };
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static const u32 udma_tdvsmin[] = { 70, 48, 31, 20, 7, 5 };
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static const u32 udma_tenvmax[] = { 70, 70, 70, 55, 55, 50 };
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static const u32 udma_trpmin[] = { 160, 125, 100, 100, 100, 85 };
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static const u32 udma_tmin[] = { 5, 5, 5, 5, 3, 3 };
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static const u32 udma_tmlimin = 20;
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static const u32 udma_tzahmin = 20;
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static const u32 udma_tenvmin = 20;
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static const u32 udma_tackmin = 20;
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static const u32 udma_tssmin = 50;
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/**
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*
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* Function: num_clocks_min
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*
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* Description:
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* calculate number of SCLK cycles to meet minimum timing
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*/
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static unsigned short num_clocks_min(unsigned long tmin,
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unsigned long fsclk)
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{
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unsigned long tmp ;
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unsigned short result;
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tmp = tmin * (fsclk/1000/1000) / 1000;
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result = (unsigned short)tmp;
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if ((tmp*1000*1000) < (tmin*(fsclk/1000))) {
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result++;
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}
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return result;
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}
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/**
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* bfin_set_piomode - Initialize host controller PATA PIO timings
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* @ap: Port whose timings we are configuring
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* @adev: um
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*
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* Set PIO mode for device.
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*
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* LOCKING:
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* None (inherited from caller).
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*/
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static void bfin_set_piomode(struct ata_port *ap, struct ata_device *adev)
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{
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int mode = adev->pio_mode - XFER_PIO_0;
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void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
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unsigned int fsclk = get_sclk();
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unsigned short teoc_reg, t2_reg, teoc_pio;
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unsigned short t4_reg, t2_pio, t1_reg;
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unsigned short n0, n6, t6min = 5;
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/* the most restrictive timing value is t6 and tc, the DIOW - data hold
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* If one SCLK pulse is longer than this minimum value then register
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* transfers cannot be supported at this frequency.
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*/
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n6 = num_clocks_min(t6min, fsclk);
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if (mode >= 0 && mode <= 4 && n6 >= 1) {
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dev_dbg(adev->link->ap->dev, "set piomode: mode=%d, fsclk=%ud\n", mode, fsclk);
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/* calculate the timing values for register transfers. */
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while (mode > 0 && pio_fsclk[mode] > fsclk)
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mode--;
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/* DIOR/DIOW to end cycle time */
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t2_reg = num_clocks_min(reg_t2min[mode], fsclk);
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/* DIOR/DIOW asserted pulse width */
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teoc_reg = num_clocks_min(reg_teocmin[mode], fsclk);
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/* Cycle Time */
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n0 = num_clocks_min(reg_t0min[mode], fsclk);
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/* increase t2 until we meed the minimum cycle length */
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if (t2_reg + teoc_reg < n0)
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t2_reg = n0 - teoc_reg;
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/* calculate the timing values for pio transfers. */
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/* DIOR/DIOW to end cycle time */
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t2_pio = num_clocks_min(pio_t2min[mode], fsclk);
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/* DIOR/DIOW asserted pulse width */
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teoc_pio = num_clocks_min(pio_teocmin[mode], fsclk);
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/* Cycle Time */
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n0 = num_clocks_min(pio_t0min[mode], fsclk);
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/* increase t2 until we meed the minimum cycle length */
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if (t2_pio + teoc_pio < n0)
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t2_pio = n0 - teoc_pio;
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/* Address valid to DIOR/DIORW */
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t1_reg = num_clocks_min(pio_t1min[mode], fsclk);
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/* DIOW data hold */
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t4_reg = num_clocks_min(pio_t4min[mode], fsclk);
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ATAPI_SET_REG_TIM_0(base, (teoc_reg<<8 | t2_reg));
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ATAPI_SET_PIO_TIM_0(base, (t4_reg<<12 | t2_pio<<4 | t1_reg));
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ATAPI_SET_PIO_TIM_1(base, teoc_pio);
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if (mode > 2) {
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ATAPI_SET_CONTROL(base,
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ATAPI_GET_CONTROL(base) | IORDY_EN);
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} else {
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ATAPI_SET_CONTROL(base,
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ATAPI_GET_CONTROL(base) & ~IORDY_EN);
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}
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/* Disable host ATAPI PIO interrupts */
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ATAPI_SET_INT_MASK(base, ATAPI_GET_INT_MASK(base)
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& ~(PIO_DONE_MASK | HOST_TERM_XFER_MASK));
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SSYNC();
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}
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}
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/**
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* bfin_set_dmamode - Initialize host controller PATA DMA timings
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* @ap: Port whose timings we are configuring
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* @adev: um
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*
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* Set UDMA mode for device.
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*
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* LOCKING:
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* None (inherited from caller).
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*/
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static void bfin_set_dmamode(struct ata_port *ap, struct ata_device *adev)
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{
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int mode;
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void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
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unsigned long fsclk = get_sclk();
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unsigned short tenv, tack, tcyc_tdvs, tdvs, tmli, tss, trp, tzah;
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unsigned short tm, td, tkr, tkw, teoc, th;
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unsigned short n0, nf, tfmin = 5;
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unsigned short nmin, tcyc;
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mode = adev->dma_mode - XFER_UDMA_0;
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if (mode >= 0 && mode <= 5) {
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dev_dbg(adev->link->ap->dev, "set udmamode: mode=%d\n", mode);
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/* the most restrictive timing value is t6 and tc,
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* the DIOW - data hold. If one SCLK pulse is longer
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* than this minimum value then register
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* transfers cannot be supported at this frequency.
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*/
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while (mode > 0 && udma_fsclk[mode] > fsclk)
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mode--;
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nmin = num_clocks_min(udma_tmin[mode], fsclk);
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if (nmin >= 1) {
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/* calculate the timing values for Ultra DMA. */
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tdvs = num_clocks_min(udma_tdvsmin[mode], fsclk);
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tcyc = num_clocks_min(udma_tcycmin[mode], fsclk);
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tcyc_tdvs = 2;
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/* increase tcyc - tdvs (tcyc_tdvs) until we meed
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* the minimum cycle length
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*/
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if (tdvs + tcyc_tdvs < tcyc)
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tcyc_tdvs = tcyc - tdvs;
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/* Mow assign the values required for the timing
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* registers
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*/
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if (tcyc_tdvs < 2)
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tcyc_tdvs = 2;
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if (tdvs < 2)
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tdvs = 2;
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tack = num_clocks_min(udma_tackmin, fsclk);
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tss = num_clocks_min(udma_tssmin, fsclk);
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tmli = num_clocks_min(udma_tmlimin, fsclk);
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tzah = num_clocks_min(udma_tzahmin, fsclk);
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trp = num_clocks_min(udma_trpmin[mode], fsclk);
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tenv = num_clocks_min(udma_tenvmin, fsclk);
|
|
if (tenv <= udma_tenvmax[mode]) {
|
|
ATAPI_SET_ULTRA_TIM_0(base, (tenv<<8 | tack));
|
|
ATAPI_SET_ULTRA_TIM_1(base,
|
|
(tcyc_tdvs<<8 | tdvs));
|
|
ATAPI_SET_ULTRA_TIM_2(base, (tmli<<8 | tss));
|
|
ATAPI_SET_ULTRA_TIM_3(base, (trp<<8 | tzah));
|
|
|
|
/* Enable host ATAPI Untra DMA interrupts */
|
|
ATAPI_SET_INT_MASK(base,
|
|
ATAPI_GET_INT_MASK(base)
|
|
| UDMAIN_DONE_MASK
|
|
| UDMAOUT_DONE_MASK
|
|
| UDMAIN_TERM_MASK
|
|
| UDMAOUT_TERM_MASK);
|
|
}
|
|
}
|
|
}
|
|
|
|
mode = adev->dma_mode - XFER_MW_DMA_0;
|
|
if (mode >= 0 && mode <= 2) {
|
|
dev_dbg(adev->link->ap->dev, "set mdmamode: mode=%d\n", mode);
|
|
/* the most restrictive timing value is tf, the DMACK to
|
|
* read data released. If one SCLK pulse is longer than
|
|
* this maximum value then the MDMA mode
|
|
* cannot be supported at this frequency.
|
|
*/
|
|
while (mode > 0 && mdma_fsclk[mode] > fsclk)
|
|
mode--;
|
|
|
|
nf = num_clocks_min(tfmin, fsclk);
|
|
if (nf >= 1) {
|
|
/* calculate the timing values for Multi-word DMA. */
|
|
|
|
/* DIOR/DIOW asserted pulse width */
|
|
td = num_clocks_min(mdma_tdmin[mode], fsclk);
|
|
|
|
/* DIOR negated pulse width */
|
|
tkw = num_clocks_min(mdma_tkwmin[mode], fsclk);
|
|
|
|
/* Cycle Time */
|
|
n0 = num_clocks_min(mdma_t0min[mode], fsclk);
|
|
|
|
/* increase tk until we meed the minimum cycle length */
|
|
if (tkw + td < n0)
|
|
tkw = n0 - td;
|
|
|
|
/* DIOR negated pulse width - read */
|
|
tkr = num_clocks_min(mdma_tkrmin[mode], fsclk);
|
|
/* CS{1:0] valid to DIOR/DIOW */
|
|
tm = num_clocks_min(mdma_tmmin[mode], fsclk);
|
|
/* DIOR/DIOW to DMACK hold */
|
|
teoc = num_clocks_min(mdma_tjmin[mode], fsclk);
|
|
/* DIOW Data hold */
|
|
th = num_clocks_min(mdma_thmin[mode], fsclk);
|
|
|
|
ATAPI_SET_MULTI_TIM_0(base, (tm<<8 | td));
|
|
ATAPI_SET_MULTI_TIM_1(base, (tkr<<8 | tkw));
|
|
ATAPI_SET_MULTI_TIM_2(base, (teoc<<8 | th));
|
|
|
|
/* Enable host ATAPI Multi DMA interrupts */
|
|
ATAPI_SET_INT_MASK(base, ATAPI_GET_INT_MASK(base)
|
|
| MULTI_DONE_MASK | MULTI_TERM_MASK);
|
|
SSYNC();
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* Function: wait_complete
|
|
*
|
|
* Description: Waits the interrupt from device
|
|
*
|
|
*/
|
|
static inline void wait_complete(void __iomem *base, unsigned short mask)
|
|
{
|
|
unsigned short status;
|
|
unsigned int i = 0;
|
|
|
|
#define PATA_BF54X_WAIT_TIMEOUT 10000
|
|
|
|
for (i = 0; i < PATA_BF54X_WAIT_TIMEOUT; i++) {
|
|
status = ATAPI_GET_INT_STATUS(base) & mask;
|
|
if (status)
|
|
break;
|
|
}
|
|
|
|
ATAPI_SET_INT_STATUS(base, mask);
|
|
}
|
|
|
|
/**
|
|
*
|
|
* Function: write_atapi_register
|
|
*
|
|
* Description: Writes to ATA Device Resgister
|
|
*
|
|
*/
|
|
|
|
static void write_atapi_register(void __iomem *base,
|
|
unsigned long ata_reg, unsigned short value)
|
|
{
|
|
/* Program the ATA_DEV_TXBUF register with write data (to be
|
|
* written into the device).
|
|
*/
|
|
ATAPI_SET_DEV_TXBUF(base, value);
|
|
|
|
/* Program the ATA_DEV_ADDR register with address of the
|
|
* device register (0x01 to 0x0F).
|
|
*/
|
|
ATAPI_SET_DEV_ADDR(base, ata_reg);
|
|
|
|
/* Program the ATA_CTRL register with dir set to write (1)
|
|
*/
|
|
ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | XFER_DIR));
|
|
|
|
/* ensure PIO DMA is not set */
|
|
ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
|
|
|
|
/* and start the transfer */
|
|
ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
|
|
|
|
/* Wait for the interrupt to indicate the end of the transfer.
|
|
* (We need to wait on and clear rhe ATA_DEV_INT interrupt status)
|
|
*/
|
|
wait_complete(base, PIO_DONE_INT);
|
|
}
|
|
|
|
/**
|
|
*
|
|
* Function: read_atapi_register
|
|
*
|
|
*Description: Reads from ATA Device Resgister
|
|
*
|
|
*/
|
|
|
|
static unsigned short read_atapi_register(void __iomem *base,
|
|
unsigned long ata_reg)
|
|
{
|
|
/* Program the ATA_DEV_ADDR register with address of the
|
|
* device register (0x01 to 0x0F).
|
|
*/
|
|
ATAPI_SET_DEV_ADDR(base, ata_reg);
|
|
|
|
/* Program the ATA_CTRL register with dir set to read (0) and
|
|
*/
|
|
ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~XFER_DIR));
|
|
|
|
/* ensure PIO DMA is not set */
|
|
ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
|
|
|
|
/* and start the transfer */
|
|
ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
|
|
|
|
/* Wait for the interrupt to indicate the end of the transfer.
|
|
* (PIO_DONE interrupt is set and it doesn't seem to matter
|
|
* that we don't clear it)
|
|
*/
|
|
wait_complete(base, PIO_DONE_INT);
|
|
|
|
/* Read the ATA_DEV_RXBUF register with write data (to be
|
|
* written into the device).
|
|
*/
|
|
return ATAPI_GET_DEV_RXBUF(base);
|
|
}
|
|
|
|
/**
|
|
*
|
|
* Function: write_atapi_register_data
|
|
*
|
|
* Description: Writes to ATA Device Resgister
|
|
*
|
|
*/
|
|
|
|
static void write_atapi_data(void __iomem *base,
|
|
int len, unsigned short *buf)
|
|
{
|
|
int i;
|
|
|
|
/* Set transfer length to 1 */
|
|
ATAPI_SET_XFER_LEN(base, 1);
|
|
|
|
/* Program the ATA_DEV_ADDR register with address of the
|
|
* ATA_REG_DATA
|
|
*/
|
|
ATAPI_SET_DEV_ADDR(base, ATA_REG_DATA);
|
|
|
|
/* Program the ATA_CTRL register with dir set to write (1)
|
|
*/
|
|
ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | XFER_DIR));
|
|
|
|
/* ensure PIO DMA is not set */
|
|
ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
|
|
|
|
for (i = 0; i < len; i++) {
|
|
/* Program the ATA_DEV_TXBUF register with write data (to be
|
|
* written into the device).
|
|
*/
|
|
ATAPI_SET_DEV_TXBUF(base, buf[i]);
|
|
|
|
/* and start the transfer */
|
|
ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
|
|
|
|
/* Wait for the interrupt to indicate the end of the transfer.
|
|
* (We need to wait on and clear rhe ATA_DEV_INT
|
|
* interrupt status)
|
|
*/
|
|
wait_complete(base, PIO_DONE_INT);
|
|
}
|
|
}
|
|
|
|
/**
|
|
*
|
|
* Function: read_atapi_register_data
|
|
*
|
|
* Description: Reads from ATA Device Resgister
|
|
*
|
|
*/
|
|
|
|
static void read_atapi_data(void __iomem *base,
|
|
int len, unsigned short *buf)
|
|
{
|
|
int i;
|
|
|
|
/* Set transfer length to 1 */
|
|
ATAPI_SET_XFER_LEN(base, 1);
|
|
|
|
/* Program the ATA_DEV_ADDR register with address of the
|
|
* ATA_REG_DATA
|
|
*/
|
|
ATAPI_SET_DEV_ADDR(base, ATA_REG_DATA);
|
|
|
|
/* Program the ATA_CTRL register with dir set to read (0) and
|
|
*/
|
|
ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~XFER_DIR));
|
|
|
|
/* ensure PIO DMA is not set */
|
|
ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
|
|
|
|
for (i = 0; i < len; i++) {
|
|
/* and start the transfer */
|
|
ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
|
|
|
|
/* Wait for the interrupt to indicate the end of the transfer.
|
|
* (PIO_DONE interrupt is set and it doesn't seem to matter
|
|
* that we don't clear it)
|
|
*/
|
|
wait_complete(base, PIO_DONE_INT);
|
|
|
|
/* Read the ATA_DEV_RXBUF register with write data (to be
|
|
* written into the device).
|
|
*/
|
|
buf[i] = ATAPI_GET_DEV_RXBUF(base);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* bfin_tf_load - send taskfile registers to host controller
|
|
* @ap: Port to which output is sent
|
|
* @tf: ATA taskfile register set
|
|
*
|
|
* Note: Original code is ata_sff_tf_load().
|
|
*/
|
|
|
|
static void bfin_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
|
|
{
|
|
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
|
|
unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
|
|
|
|
if (tf->ctl != ap->last_ctl) {
|
|
write_atapi_register(base, ATA_REG_CTRL, tf->ctl);
|
|
ap->last_ctl = tf->ctl;
|
|
ata_wait_idle(ap);
|
|
}
|
|
|
|
if (is_addr) {
|
|
if (tf->flags & ATA_TFLAG_LBA48) {
|
|
write_atapi_register(base, ATA_REG_FEATURE,
|
|
tf->hob_feature);
|
|
write_atapi_register(base, ATA_REG_NSECT,
|
|
tf->hob_nsect);
|
|
write_atapi_register(base, ATA_REG_LBAL, tf->hob_lbal);
|
|
write_atapi_register(base, ATA_REG_LBAM, tf->hob_lbam);
|
|
write_atapi_register(base, ATA_REG_LBAH, tf->hob_lbah);
|
|
dev_dbg(ap->dev, "hob: feat 0x%X nsect 0x%X, lba 0x%X "
|
|
"0x%X 0x%X\n",
|
|
tf->hob_feature,
|
|
tf->hob_nsect,
|
|
tf->hob_lbal,
|
|
tf->hob_lbam,
|
|
tf->hob_lbah);
|
|
}
|
|
|
|
write_atapi_register(base, ATA_REG_FEATURE, tf->feature);
|
|
write_atapi_register(base, ATA_REG_NSECT, tf->nsect);
|
|
write_atapi_register(base, ATA_REG_LBAL, tf->lbal);
|
|
write_atapi_register(base, ATA_REG_LBAM, tf->lbam);
|
|
write_atapi_register(base, ATA_REG_LBAH, tf->lbah);
|
|
dev_dbg(ap->dev, "feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
|
|
tf->feature,
|
|
tf->nsect,
|
|
tf->lbal,
|
|
tf->lbam,
|
|
tf->lbah);
|
|
}
|
|
|
|
if (tf->flags & ATA_TFLAG_DEVICE) {
|
|
write_atapi_register(base, ATA_REG_DEVICE, tf->device);
|
|
dev_dbg(ap->dev, "device 0x%X\n", tf->device);
|
|
}
|
|
|
|
ata_wait_idle(ap);
|
|
}
|
|
|
|
/**
|
|
* bfin_check_status - Read device status reg & clear interrupt
|
|
* @ap: port where the device is
|
|
*
|
|
* Note: Original code is ata_check_status().
|
|
*/
|
|
|
|
static u8 bfin_check_status(struct ata_port *ap)
|
|
{
|
|
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
|
|
return read_atapi_register(base, ATA_REG_STATUS);
|
|
}
|
|
|
|
/**
|
|
* bfin_tf_read - input device's ATA taskfile shadow registers
|
|
* @ap: Port from which input is read
|
|
* @tf: ATA taskfile register set for storing input
|
|
*
|
|
* Note: Original code is ata_sff_tf_read().
|
|
*/
|
|
|
|
static void bfin_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
|
|
{
|
|
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
|
|
|
|
tf->command = bfin_check_status(ap);
|
|
tf->feature = read_atapi_register(base, ATA_REG_ERR);
|
|
tf->nsect = read_atapi_register(base, ATA_REG_NSECT);
|
|
tf->lbal = read_atapi_register(base, ATA_REG_LBAL);
|
|
tf->lbam = read_atapi_register(base, ATA_REG_LBAM);
|
|
tf->lbah = read_atapi_register(base, ATA_REG_LBAH);
|
|
tf->device = read_atapi_register(base, ATA_REG_DEVICE);
|
|
|
|
if (tf->flags & ATA_TFLAG_LBA48) {
|
|
write_atapi_register(base, ATA_REG_CTRL, tf->ctl | ATA_HOB);
|
|
tf->hob_feature = read_atapi_register(base, ATA_REG_ERR);
|
|
tf->hob_nsect = read_atapi_register(base, ATA_REG_NSECT);
|
|
tf->hob_lbal = read_atapi_register(base, ATA_REG_LBAL);
|
|
tf->hob_lbam = read_atapi_register(base, ATA_REG_LBAM);
|
|
tf->hob_lbah = read_atapi_register(base, ATA_REG_LBAH);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* bfin_exec_command - issue ATA command to host controller
|
|
* @ap: port to which command is being issued
|
|
* @tf: ATA taskfile register set
|
|
*
|
|
* Note: Original code is ata_sff_exec_command().
|
|
*/
|
|
|
|
static void bfin_exec_command(struct ata_port *ap,
|
|
const struct ata_taskfile *tf)
|
|
{
|
|
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
|
|
dev_dbg(ap->dev, "ata%u: cmd 0x%X\n", ap->print_id, tf->command);
|
|
|
|
write_atapi_register(base, ATA_REG_CMD, tf->command);
|
|
ata_sff_pause(ap);
|
|
}
|
|
|
|
/**
|
|
* bfin_check_altstatus - Read device alternate status reg
|
|
* @ap: port where the device is
|
|
*/
|
|
|
|
static u8 bfin_check_altstatus(struct ata_port *ap)
|
|
{
|
|
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
|
|
return read_atapi_register(base, ATA_REG_ALTSTATUS);
|
|
}
|
|
|
|
/**
|
|
* bfin_dev_select - Select device 0/1 on ATA bus
|
|
* @ap: ATA channel to manipulate
|
|
* @device: ATA device (numbered from zero) to select
|
|
*
|
|
* Note: Original code is ata_sff_dev_select().
|
|
*/
|
|
|
|
static void bfin_dev_select(struct ata_port *ap, unsigned int device)
|
|
{
|
|
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
|
|
u8 tmp;
|
|
|
|
if (device == 0)
|
|
tmp = ATA_DEVICE_OBS;
|
|
else
|
|
tmp = ATA_DEVICE_OBS | ATA_DEV1;
|
|
|
|
write_atapi_register(base, ATA_REG_DEVICE, tmp);
|
|
ata_sff_pause(ap);
|
|
}
|
|
|
|
/**
|
|
* bfin_set_devctl - Write device control reg
|
|
* @ap: port where the device is
|
|
* @ctl: value to write
|
|
*/
|
|
|
|
static void bfin_set_devctl(struct ata_port *ap, u8 ctl)
|
|
{
|
|
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
|
|
write_atapi_register(base, ATA_REG_CTRL, ctl);
|
|
}
|
|
|
|
/**
|
|
* bfin_bmdma_setup - Set up IDE DMA transaction
|
|
* @qc: Info associated with this ATA transaction.
|
|
*
|
|
* Note: Original code is ata_bmdma_setup().
|
|
*/
|
|
|
|
static void bfin_bmdma_setup(struct ata_queued_cmd *qc)
|
|
{
|
|
unsigned short config = WDSIZE_16;
|
|
struct scatterlist *sg;
|
|
unsigned int si;
|
|
|
|
dev_dbg(qc->ap->dev, "in atapi dma setup\n");
|
|
/* Program the ATA_CTRL register with dir */
|
|
if (qc->tf.flags & ATA_TFLAG_WRITE) {
|
|
/* fill the ATAPI DMA controller */
|
|
set_dma_config(CH_ATAPI_TX, config);
|
|
set_dma_x_modify(CH_ATAPI_TX, 2);
|
|
for_each_sg(qc->sg, sg, qc->n_elem, si) {
|
|
set_dma_start_addr(CH_ATAPI_TX, sg_dma_address(sg));
|
|
set_dma_x_count(CH_ATAPI_TX, sg_dma_len(sg) >> 1);
|
|
}
|
|
} else {
|
|
config |= WNR;
|
|
/* fill the ATAPI DMA controller */
|
|
set_dma_config(CH_ATAPI_RX, config);
|
|
set_dma_x_modify(CH_ATAPI_RX, 2);
|
|
for_each_sg(qc->sg, sg, qc->n_elem, si) {
|
|
set_dma_start_addr(CH_ATAPI_RX, sg_dma_address(sg));
|
|
set_dma_x_count(CH_ATAPI_RX, sg_dma_len(sg) >> 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* bfin_bmdma_start - Start an IDE DMA transaction
|
|
* @qc: Info associated with this ATA transaction.
|
|
*
|
|
* Note: Original code is ata_bmdma_start().
|
|
*/
|
|
|
|
static void bfin_bmdma_start(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
|
|
struct scatterlist *sg;
|
|
unsigned int si;
|
|
|
|
dev_dbg(qc->ap->dev, "in atapi dma start\n");
|
|
if (!(ap->udma_mask || ap->mwdma_mask))
|
|
return;
|
|
|
|
/* start ATAPI DMA controller*/
|
|
if (qc->tf.flags & ATA_TFLAG_WRITE) {
|
|
/*
|
|
* On blackfin arch, uncacheable memory is not
|
|
* allocated with flag GFP_DMA. DMA buffer from
|
|
* common kenel code should be flushed if WB
|
|
* data cache is enabled. Otherwise, this loop
|
|
* is an empty loop and optimized out.
|
|
*/
|
|
for_each_sg(qc->sg, sg, qc->n_elem, si) {
|
|
flush_dcache_range(sg_dma_address(sg),
|
|
sg_dma_address(sg) + sg_dma_len(sg));
|
|
}
|
|
enable_dma(CH_ATAPI_TX);
|
|
dev_dbg(qc->ap->dev, "enable udma write\n");
|
|
|
|
/* Send ATA DMA write command */
|
|
bfin_exec_command(ap, &qc->tf);
|
|
|
|
/* set ATA DMA write direction */
|
|
ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base)
|
|
| XFER_DIR));
|
|
} else {
|
|
enable_dma(CH_ATAPI_RX);
|
|
dev_dbg(qc->ap->dev, "enable udma read\n");
|
|
|
|
/* Send ATA DMA read command */
|
|
bfin_exec_command(ap, &qc->tf);
|
|
|
|
/* set ATA DMA read direction */
|
|
ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base)
|
|
& ~XFER_DIR));
|
|
}
|
|
|
|
/* Reset all transfer count */
|
|
ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | TFRCNT_RST);
|
|
|
|
/* Set ATAPI state machine contorl in terminate sequence */
|
|
ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | END_ON_TERM);
|
|
|
|
/* Set transfer length to buffer len */
|
|
for_each_sg(qc->sg, sg, qc->n_elem, si) {
|
|
ATAPI_SET_XFER_LEN(base, (sg_dma_len(sg) >> 1));
|
|
}
|
|
|
|
/* Enable ATA DMA operation*/
|
|
if (ap->udma_mask)
|
|
ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base)
|
|
| ULTRA_START);
|
|
else
|
|
ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base)
|
|
| MULTI_START);
|
|
}
|
|
|
|
/**
|
|
* bfin_bmdma_stop - Stop IDE DMA transfer
|
|
* @qc: Command we are ending DMA for
|
|
*/
|
|
|
|
static void bfin_bmdma_stop(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
struct scatterlist *sg;
|
|
unsigned int si;
|
|
|
|
dev_dbg(qc->ap->dev, "in atapi dma stop\n");
|
|
if (!(ap->udma_mask || ap->mwdma_mask))
|
|
return;
|
|
|
|
/* stop ATAPI DMA controller*/
|
|
if (qc->tf.flags & ATA_TFLAG_WRITE)
|
|
disable_dma(CH_ATAPI_TX);
|
|
else {
|
|
disable_dma(CH_ATAPI_RX);
|
|
if (ap->hsm_task_state & HSM_ST_LAST) {
|
|
/*
|
|
* On blackfin arch, uncacheable memory is not
|
|
* allocated with flag GFP_DMA. DMA buffer from
|
|
* common kenel code should be invalidated if
|
|
* data cache is enabled. Otherwise, this loop
|
|
* is an empty loop and optimized out.
|
|
*/
|
|
for_each_sg(qc->sg, sg, qc->n_elem, si) {
|
|
invalidate_dcache_range(
|
|
sg_dma_address(sg),
|
|
sg_dma_address(sg)
|
|
+ sg_dma_len(sg));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* bfin_devchk - PATA device presence detection
|
|
* @ap: ATA channel to examine
|
|
* @device: Device to examine (starting at zero)
|
|
*
|
|
* Note: Original code is ata_devchk().
|
|
*/
|
|
|
|
static unsigned int bfin_devchk(struct ata_port *ap,
|
|
unsigned int device)
|
|
{
|
|
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
|
|
u8 nsect, lbal;
|
|
|
|
bfin_dev_select(ap, device);
|
|
|
|
write_atapi_register(base, ATA_REG_NSECT, 0x55);
|
|
write_atapi_register(base, ATA_REG_LBAL, 0xaa);
|
|
|
|
write_atapi_register(base, ATA_REG_NSECT, 0xaa);
|
|
write_atapi_register(base, ATA_REG_LBAL, 0x55);
|
|
|
|
write_atapi_register(base, ATA_REG_NSECT, 0x55);
|
|
write_atapi_register(base, ATA_REG_LBAL, 0xaa);
|
|
|
|
nsect = read_atapi_register(base, ATA_REG_NSECT);
|
|
lbal = read_atapi_register(base, ATA_REG_LBAL);
|
|
|
|
if ((nsect == 0x55) && (lbal == 0xaa))
|
|
return 1; /* we found a device */
|
|
|
|
return 0; /* nothing found */
|
|
}
|
|
|
|
/**
|
|
* bfin_bus_post_reset - PATA device post reset
|
|
*
|
|
* Note: Original code is ata_bus_post_reset().
|
|
*/
|
|
|
|
static void bfin_bus_post_reset(struct ata_port *ap, unsigned int devmask)
|
|
{
|
|
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
|
|
unsigned int dev0 = devmask & (1 << 0);
|
|
unsigned int dev1 = devmask & (1 << 1);
|
|
unsigned long deadline;
|
|
|
|
/* if device 0 was found in ata_devchk, wait for its
|
|
* BSY bit to clear
|
|
*/
|
|
if (dev0)
|
|
ata_sff_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
|
|
|
|
/* if device 1 was found in ata_devchk, wait for
|
|
* register access, then wait for BSY to clear
|
|
*/
|
|
deadline = ata_deadline(jiffies, ATA_TMOUT_BOOT);
|
|
while (dev1) {
|
|
u8 nsect, lbal;
|
|
|
|
bfin_dev_select(ap, 1);
|
|
nsect = read_atapi_register(base, ATA_REG_NSECT);
|
|
lbal = read_atapi_register(base, ATA_REG_LBAL);
|
|
if ((nsect == 1) && (lbal == 1))
|
|
break;
|
|
if (time_after(jiffies, deadline)) {
|
|
dev1 = 0;
|
|
break;
|
|
}
|
|
ata_msleep(ap, 50); /* give drive a breather */
|
|
}
|
|
if (dev1)
|
|
ata_sff_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
|
|
|
|
/* is all this really necessary? */
|
|
bfin_dev_select(ap, 0);
|
|
if (dev1)
|
|
bfin_dev_select(ap, 1);
|
|
if (dev0)
|
|
bfin_dev_select(ap, 0);
|
|
}
|
|
|
|
/**
|
|
* bfin_bus_softreset - PATA device software reset
|
|
*
|
|
* Note: Original code is ata_bus_softreset().
|
|
*/
|
|
|
|
static unsigned int bfin_bus_softreset(struct ata_port *ap,
|
|
unsigned int devmask)
|
|
{
|
|
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
|
|
|
|
/* software reset. causes dev0 to be selected */
|
|
write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
|
|
udelay(20);
|
|
write_atapi_register(base, ATA_REG_CTRL, ap->ctl | ATA_SRST);
|
|
udelay(20);
|
|
write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
|
|
|
|
/* spec mandates ">= 2ms" before checking status.
|
|
* We wait 150ms, because that was the magic delay used for
|
|
* ATAPI devices in Hale Landis's ATADRVR, for the period of time
|
|
* between when the ATA command register is written, and then
|
|
* status is checked. Because waiting for "a while" before
|
|
* checking status is fine, post SRST, we perform this magic
|
|
* delay here as well.
|
|
*
|
|
* Old drivers/ide uses the 2mS rule and then waits for ready
|
|
*/
|
|
ata_msleep(ap, 150);
|
|
|
|
/* Before we perform post reset processing we want to see if
|
|
* the bus shows 0xFF because the odd clown forgets the D7
|
|
* pulldown resistor.
|
|
*/
|
|
if (bfin_check_status(ap) == 0xFF)
|
|
return 0;
|
|
|
|
bfin_bus_post_reset(ap, devmask);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* bfin_softreset - reset host port via ATA SRST
|
|
* @ap: port to reset
|
|
* @classes: resulting classes of attached devices
|
|
*
|
|
* Note: Original code is ata_sff_softreset().
|
|
*/
|
|
|
|
static int bfin_softreset(struct ata_link *link, unsigned int *classes,
|
|
unsigned long deadline)
|
|
{
|
|
struct ata_port *ap = link->ap;
|
|
unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
|
|
unsigned int devmask = 0, err_mask;
|
|
u8 err;
|
|
|
|
/* determine if device 0/1 are present */
|
|
if (bfin_devchk(ap, 0))
|
|
devmask |= (1 << 0);
|
|
if (slave_possible && bfin_devchk(ap, 1))
|
|
devmask |= (1 << 1);
|
|
|
|
/* select device 0 again */
|
|
bfin_dev_select(ap, 0);
|
|
|
|
/* issue bus reset */
|
|
err_mask = bfin_bus_softreset(ap, devmask);
|
|
if (err_mask) {
|
|
ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n",
|
|
err_mask);
|
|
return -EIO;
|
|
}
|
|
|
|
/* determine by signature whether we have ATA or ATAPI devices */
|
|
classes[0] = ata_sff_dev_classify(&ap->link.device[0],
|
|
devmask & (1 << 0), &err);
|
|
if (slave_possible && err != 0x81)
|
|
classes[1] = ata_sff_dev_classify(&ap->link.device[1],
|
|
devmask & (1 << 1), &err);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* bfin_bmdma_status - Read IDE DMA status
|
|
* @ap: Port associated with this ATA transaction.
|
|
*/
|
|
|
|
static unsigned char bfin_bmdma_status(struct ata_port *ap)
|
|
{
|
|
unsigned char host_stat = 0;
|
|
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
|
|
unsigned short int_status = ATAPI_GET_INT_STATUS(base);
|
|
|
|
if (ATAPI_GET_STATUS(base) & (MULTI_XFER_ON|ULTRA_XFER_ON))
|
|
host_stat |= ATA_DMA_ACTIVE;
|
|
if (int_status & (MULTI_DONE_INT|UDMAIN_DONE_INT|UDMAOUT_DONE_INT|
|
|
ATAPI_DEV_INT))
|
|
host_stat |= ATA_DMA_INTR;
|
|
if (int_status & (MULTI_TERM_INT|UDMAIN_TERM_INT|UDMAOUT_TERM_INT))
|
|
host_stat |= ATA_DMA_ERR|ATA_DMA_INTR;
|
|
|
|
dev_dbg(ap->dev, "ATAPI: host_stat=0x%x\n", host_stat);
|
|
|
|
return host_stat;
|
|
}
|
|
|
|
/**
|
|
* bfin_data_xfer - Transfer data by PIO
|
|
* @adev: device for this I/O
|
|
* @buf: data buffer
|
|
* @buflen: buffer length
|
|
* @write_data: read/write
|
|
*
|
|
* Note: Original code is ata_sff_data_xfer().
|
|
*/
|
|
|
|
static unsigned int bfin_data_xfer(struct ata_device *dev, unsigned char *buf,
|
|
unsigned int buflen, int rw)
|
|
{
|
|
struct ata_port *ap = dev->link->ap;
|
|
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
|
|
unsigned int words = buflen >> 1;
|
|
unsigned short *buf16 = (u16 *)buf;
|
|
|
|
/* Transfer multiple of 2 bytes */
|
|
if (rw == READ)
|
|
read_atapi_data(base, words, buf16);
|
|
else
|
|
write_atapi_data(base, words, buf16);
|
|
|
|
/* Transfer trailing 1 byte, if any. */
|
|
if (unlikely(buflen & 0x01)) {
|
|
unsigned short align_buf[1] = { 0 };
|
|
unsigned char *trailing_buf = buf + buflen - 1;
|
|
|
|
if (rw == READ) {
|
|
read_atapi_data(base, 1, align_buf);
|
|
memcpy(trailing_buf, align_buf, 1);
|
|
} else {
|
|
memcpy(align_buf, trailing_buf, 1);
|
|
write_atapi_data(base, 1, align_buf);
|
|
}
|
|
words++;
|
|
}
|
|
|
|
return words << 1;
|
|
}
|
|
|
|
/**
|
|
* bfin_irq_clear - Clear ATAPI interrupt.
|
|
* @ap: Port associated with this ATA transaction.
|
|
*
|
|
* Note: Original code is ata_bmdma_irq_clear().
|
|
*/
|
|
|
|
static void bfin_irq_clear(struct ata_port *ap)
|
|
{
|
|
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
|
|
|
|
dev_dbg(ap->dev, "in atapi irq clear\n");
|
|
ATAPI_SET_INT_STATUS(base, ATAPI_GET_INT_STATUS(base)|ATAPI_DEV_INT
|
|
| MULTI_DONE_INT | UDMAIN_DONE_INT | UDMAOUT_DONE_INT
|
|
| MULTI_TERM_INT | UDMAIN_TERM_INT | UDMAOUT_TERM_INT);
|
|
}
|
|
|
|
/**
|
|
* bfin_thaw - Thaw DMA controller port
|
|
* @ap: port to thaw
|
|
*
|
|
* Note: Original code is ata_sff_thaw().
|
|
*/
|
|
|
|
void bfin_thaw(struct ata_port *ap)
|
|
{
|
|
dev_dbg(ap->dev, "in atapi dma thaw\n");
|
|
bfin_check_status(ap);
|
|
ata_sff_irq_on(ap);
|
|
}
|
|
|
|
/**
|
|
* bfin_postreset - standard postreset callback
|
|
* @ap: the target ata_port
|
|
* @classes: classes of attached devices
|
|
*
|
|
* Note: Original code is ata_sff_postreset().
|
|
*/
|
|
|
|
static void bfin_postreset(struct ata_link *link, unsigned int *classes)
|
|
{
|
|
struct ata_port *ap = link->ap;
|
|
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
|
|
|
|
/* re-enable interrupts */
|
|
ata_sff_irq_on(ap);
|
|
|
|
/* is double-select really necessary? */
|
|
if (classes[0] != ATA_DEV_NONE)
|
|
bfin_dev_select(ap, 1);
|
|
if (classes[1] != ATA_DEV_NONE)
|
|
bfin_dev_select(ap, 0);
|
|
|
|
/* bail out if no device is present */
|
|
if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
|
|
return;
|
|
}
|
|
|
|
/* set up device control */
|
|
write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
|
|
}
|
|
|
|
static void bfin_port_stop(struct ata_port *ap)
|
|
{
|
|
dev_dbg(ap->dev, "in atapi port stop\n");
|
|
if (ap->udma_mask != 0 || ap->mwdma_mask != 0) {
|
|
free_dma(CH_ATAPI_RX);
|
|
free_dma(CH_ATAPI_TX);
|
|
}
|
|
}
|
|
|
|
static int bfin_port_start(struct ata_port *ap)
|
|
{
|
|
dev_dbg(ap->dev, "in atapi port start\n");
|
|
if (!(ap->udma_mask || ap->mwdma_mask))
|
|
return 0;
|
|
|
|
if (request_dma(CH_ATAPI_RX, "BFIN ATAPI RX DMA") >= 0) {
|
|
if (request_dma(CH_ATAPI_TX,
|
|
"BFIN ATAPI TX DMA") >= 0)
|
|
return 0;
|
|
|
|
free_dma(CH_ATAPI_RX);
|
|
}
|
|
|
|
ap->udma_mask = 0;
|
|
ap->mwdma_mask = 0;
|
|
dev_err(ap->dev, "Unable to request ATAPI DMA!"
|
|
" Continue in PIO mode.\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static unsigned int bfin_ata_host_intr(struct ata_port *ap,
|
|
struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_eh_info *ehi = &ap->link.eh_info;
|
|
u8 status, host_stat = 0;
|
|
|
|
VPRINTK("ata%u: protocol %d task_state %d\n",
|
|
ap->print_id, qc->tf.protocol, ap->hsm_task_state);
|
|
|
|
/* Check whether we are expecting interrupt in this state */
|
|
switch (ap->hsm_task_state) {
|
|
case HSM_ST_FIRST:
|
|
/* Some pre-ATAPI-4 devices assert INTRQ
|
|
* at this state when ready to receive CDB.
|
|
*/
|
|
|
|
/* Check the ATA_DFLAG_CDB_INTR flag is enough here.
|
|
* The flag was turned on only for atapi devices.
|
|
* No need to check is_atapi_taskfile(&qc->tf) again.
|
|
*/
|
|
if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
|
|
goto idle_irq;
|
|
break;
|
|
case HSM_ST_LAST:
|
|
if (qc->tf.protocol == ATA_PROT_DMA ||
|
|
qc->tf.protocol == ATAPI_PROT_DMA) {
|
|
/* check status of DMA engine */
|
|
host_stat = ap->ops->bmdma_status(ap);
|
|
VPRINTK("ata%u: host_stat 0x%X\n",
|
|
ap->print_id, host_stat);
|
|
|
|
/* if it's not our irq... */
|
|
if (!(host_stat & ATA_DMA_INTR))
|
|
goto idle_irq;
|
|
|
|
/* before we do anything else, clear DMA-Start bit */
|
|
ap->ops->bmdma_stop(qc);
|
|
|
|
if (unlikely(host_stat & ATA_DMA_ERR)) {
|
|
/* error when transferring data to/from memory */
|
|
qc->err_mask |= AC_ERR_HOST_BUS;
|
|
ap->hsm_task_state = HSM_ST_ERR;
|
|
}
|
|
}
|
|
break;
|
|
case HSM_ST:
|
|
break;
|
|
default:
|
|
goto idle_irq;
|
|
}
|
|
|
|
/* check altstatus */
|
|
status = ap->ops->sff_check_altstatus(ap);
|
|
if (status & ATA_BUSY)
|
|
goto busy_ata;
|
|
|
|
/* check main status, clearing INTRQ */
|
|
status = ap->ops->sff_check_status(ap);
|
|
if (unlikely(status & ATA_BUSY))
|
|
goto busy_ata;
|
|
|
|
/* ack bmdma irq events */
|
|
ap->ops->sff_irq_clear(ap);
|
|
|
|
ata_sff_hsm_move(ap, qc, status, 0);
|
|
|
|
if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA ||
|
|
qc->tf.protocol == ATAPI_PROT_DMA))
|
|
ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat);
|
|
|
|
busy_ata:
|
|
return 1; /* irq handled */
|
|
|
|
idle_irq:
|
|
ap->stats.idle_irq++;
|
|
|
|
#ifdef ATA_IRQ_TRAP
|
|
if ((ap->stats.idle_irq % 1000) == 0) {
|
|
ap->ops->irq_ack(ap, 0); /* debug trap */
|
|
ata_port_printk(ap, KERN_WARNING, "irq trap\n");
|
|
return 1;
|
|
}
|
|
#endif
|
|
return 0; /* irq not handled */
|
|
}
|
|
|
|
static irqreturn_t bfin_ata_interrupt(int irq, void *dev_instance)
|
|
{
|
|
struct ata_host *host = dev_instance;
|
|
unsigned int i;
|
|
unsigned int handled = 0;
|
|
unsigned long flags;
|
|
|
|
/* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
|
|
for (i = 0; i < host->n_ports; i++) {
|
|
struct ata_port *ap = host->ports[i];
|
|
struct ata_queued_cmd *qc;
|
|
|
|
qc = ata_qc_from_tag(ap, ap->link.active_tag);
|
|
if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
|
|
handled |= bfin_ata_host_intr(ap, qc);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
|
|
return IRQ_RETVAL(handled);
|
|
}
|
|
|
|
|
|
static struct scsi_host_template bfin_sht = {
|
|
ATA_BASE_SHT(DRV_NAME),
|
|
.sg_tablesize = SG_NONE,
|
|
.dma_boundary = ATA_DMA_BOUNDARY,
|
|
};
|
|
|
|
static struct ata_port_operations bfin_pata_ops = {
|
|
.inherits = &ata_bmdma_port_ops,
|
|
|
|
.set_piomode = bfin_set_piomode,
|
|
.set_dmamode = bfin_set_dmamode,
|
|
|
|
.sff_tf_load = bfin_tf_load,
|
|
.sff_tf_read = bfin_tf_read,
|
|
.sff_exec_command = bfin_exec_command,
|
|
.sff_check_status = bfin_check_status,
|
|
.sff_check_altstatus = bfin_check_altstatus,
|
|
.sff_dev_select = bfin_dev_select,
|
|
.sff_set_devctl = bfin_set_devctl,
|
|
|
|
.bmdma_setup = bfin_bmdma_setup,
|
|
.bmdma_start = bfin_bmdma_start,
|
|
.bmdma_stop = bfin_bmdma_stop,
|
|
.bmdma_status = bfin_bmdma_status,
|
|
.sff_data_xfer = bfin_data_xfer,
|
|
|
|
.qc_prep = ata_noop_qc_prep,
|
|
|
|
.thaw = bfin_thaw,
|
|
.softreset = bfin_softreset,
|
|
.postreset = bfin_postreset,
|
|
|
|
.sff_irq_clear = bfin_irq_clear,
|
|
|
|
.port_start = bfin_port_start,
|
|
.port_stop = bfin_port_stop,
|
|
};
|
|
|
|
static struct ata_port_info bfin_port_info[] = {
|
|
{
|
|
.flags = ATA_FLAG_SLAVE_POSS,
|
|
.pio_mask = ATA_PIO4,
|
|
.mwdma_mask = 0,
|
|
.udma_mask = 0,
|
|
.port_ops = &bfin_pata_ops,
|
|
},
|
|
};
|
|
|
|
/**
|
|
* bfin_reset_controller - initialize BF54x ATAPI controller.
|
|
*/
|
|
|
|
static int bfin_reset_controller(struct ata_host *host)
|
|
{
|
|
void __iomem *base = (void __iomem *)host->ports[0]->ioaddr.ctl_addr;
|
|
int count;
|
|
unsigned short status;
|
|
|
|
/* Disable all ATAPI interrupts */
|
|
ATAPI_SET_INT_MASK(base, 0);
|
|
SSYNC();
|
|
|
|
/* Assert the RESET signal 25us*/
|
|
ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | DEV_RST);
|
|
udelay(30);
|
|
|
|
/* Negate the RESET signal for 2ms*/
|
|
ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) & ~DEV_RST);
|
|
msleep(2);
|
|
|
|
/* Wait on Busy flag to clear */
|
|
count = 10000000;
|
|
do {
|
|
status = read_atapi_register(base, ATA_REG_STATUS);
|
|
} while (--count && (status & ATA_BUSY));
|
|
|
|
/* Enable only ATAPI Device interrupt */
|
|
ATAPI_SET_INT_MASK(base, 1);
|
|
SSYNC();
|
|
|
|
return (!count);
|
|
}
|
|
|
|
/**
|
|
* atapi_io_port - define atapi peripheral port pins.
|
|
*/
|
|
static unsigned short atapi_io_port[] = {
|
|
P_ATAPI_RESET,
|
|
P_ATAPI_DIOR,
|
|
P_ATAPI_DIOW,
|
|
P_ATAPI_CS0,
|
|
P_ATAPI_CS1,
|
|
P_ATAPI_DMACK,
|
|
P_ATAPI_DMARQ,
|
|
P_ATAPI_INTRQ,
|
|
P_ATAPI_IORDY,
|
|
P_ATAPI_D0A,
|
|
P_ATAPI_D1A,
|
|
P_ATAPI_D2A,
|
|
P_ATAPI_D3A,
|
|
P_ATAPI_D4A,
|
|
P_ATAPI_D5A,
|
|
P_ATAPI_D6A,
|
|
P_ATAPI_D7A,
|
|
P_ATAPI_D8A,
|
|
P_ATAPI_D9A,
|
|
P_ATAPI_D10A,
|
|
P_ATAPI_D11A,
|
|
P_ATAPI_D12A,
|
|
P_ATAPI_D13A,
|
|
P_ATAPI_D14A,
|
|
P_ATAPI_D15A,
|
|
P_ATAPI_A0A,
|
|
P_ATAPI_A1A,
|
|
P_ATAPI_A2A,
|
|
0
|
|
};
|
|
|
|
/**
|
|
* bfin_atapi_probe - attach a bfin atapi interface
|
|
* @pdev: platform device
|
|
*
|
|
* Register a bfin atapi interface.
|
|
*
|
|
*
|
|
* Platform devices are expected to contain 2 resources per port:
|
|
*
|
|
* - I/O Base (IORESOURCE_IO)
|
|
* - IRQ (IORESOURCE_IRQ)
|
|
*
|
|
*/
|
|
static int __devinit bfin_atapi_probe(struct platform_device *pdev)
|
|
{
|
|
int board_idx = 0;
|
|
struct resource *res;
|
|
struct ata_host *host;
|
|
unsigned int fsclk = get_sclk();
|
|
int udma_mode = 5;
|
|
const struct ata_port_info *ppi[] =
|
|
{ &bfin_port_info[board_idx], NULL };
|
|
|
|
/*
|
|
* Simple resource validation ..
|
|
*/
|
|
if (unlikely(pdev->num_resources != 2)) {
|
|
dev_err(&pdev->dev, "invalid number of resources\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Get the register base first
|
|
*/
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (res == NULL)
|
|
return -EINVAL;
|
|
|
|
while (bfin_port_info[board_idx].udma_mask > 0 &&
|
|
udma_fsclk[udma_mode] > fsclk) {
|
|
udma_mode--;
|
|
bfin_port_info[board_idx].udma_mask >>= 1;
|
|
}
|
|
|
|
/*
|
|
* Now that that's out of the way, wire up the port..
|
|
*/
|
|
host = ata_host_alloc_pinfo(&pdev->dev, ppi, 1);
|
|
if (!host)
|
|
return -ENOMEM;
|
|
|
|
host->ports[0]->ioaddr.ctl_addr = (void *)res->start;
|
|
|
|
if (peripheral_request_list(atapi_io_port, "atapi-io-port")) {
|
|
dev_err(&pdev->dev, "Requesting Peripherals failed\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
if (bfin_reset_controller(host)) {
|
|
peripheral_free_list(atapi_io_port);
|
|
dev_err(&pdev->dev, "Fail to reset ATAPI device\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
if (ata_host_activate(host, platform_get_irq(pdev, 0),
|
|
bfin_ata_interrupt, IRQF_SHARED, &bfin_sht) != 0) {
|
|
peripheral_free_list(atapi_io_port);
|
|
dev_err(&pdev->dev, "Fail to attach ATAPI device\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
dev_set_drvdata(&pdev->dev, host);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* bfin_atapi_remove - unplug a bfin atapi interface
|
|
* @pdev: platform device
|
|
*
|
|
* A bfin atapi device has been unplugged. Perform the needed
|
|
* cleanup. Also called on module unload for any active devices.
|
|
*/
|
|
static int __devexit bfin_atapi_remove(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct ata_host *host = dev_get_drvdata(dev);
|
|
|
|
ata_host_detach(host);
|
|
dev_set_drvdata(&pdev->dev, NULL);
|
|
|
|
peripheral_free_list(atapi_io_port);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int bfin_atapi_suspend(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
struct ata_host *host = dev_get_drvdata(&pdev->dev);
|
|
if (host)
|
|
return ata_host_suspend(host, state);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static int bfin_atapi_resume(struct platform_device *pdev)
|
|
{
|
|
struct ata_host *host = dev_get_drvdata(&pdev->dev);
|
|
int ret;
|
|
|
|
if (host) {
|
|
ret = bfin_reset_controller(host);
|
|
if (ret) {
|
|
printk(KERN_ERR DRV_NAME ": Error during HW init\n");
|
|
return ret;
|
|
}
|
|
ata_host_resume(host);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define bfin_atapi_suspend NULL
|
|
#define bfin_atapi_resume NULL
|
|
#endif
|
|
|
|
static struct platform_driver bfin_atapi_driver = {
|
|
.probe = bfin_atapi_probe,
|
|
.remove = __devexit_p(bfin_atapi_remove),
|
|
.suspend = bfin_atapi_suspend,
|
|
.resume = bfin_atapi_resume,
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
#define ATAPI_MODE_SIZE 10
|
|
static char bfin_atapi_mode[ATAPI_MODE_SIZE];
|
|
|
|
static int __init bfin_atapi_init(void)
|
|
{
|
|
pr_info("register bfin atapi driver\n");
|
|
|
|
switch(bfin_atapi_mode[0]) {
|
|
case 'p':
|
|
case 'P':
|
|
break;
|
|
case 'm':
|
|
case 'M':
|
|
bfin_port_info[0].mwdma_mask = ATA_MWDMA2;
|
|
break;
|
|
default:
|
|
bfin_port_info[0].udma_mask = ATA_UDMA5;
|
|
};
|
|
|
|
return platform_driver_register(&bfin_atapi_driver);
|
|
}
|
|
|
|
static void __exit bfin_atapi_exit(void)
|
|
{
|
|
platform_driver_unregister(&bfin_atapi_driver);
|
|
}
|
|
|
|
module_init(bfin_atapi_init);
|
|
module_exit(bfin_atapi_exit);
|
|
/*
|
|
* ATAPI mode:
|
|
* pio/PIO
|
|
* udma/UDMA (default)
|
|
* mwdma/MWDMA
|
|
*/
|
|
module_param_string(bfin_atapi_mode, bfin_atapi_mode, ATAPI_MODE_SIZE, 0);
|
|
|
|
MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
|
|
MODULE_DESCRIPTION("PATA driver for blackfin 54x ATAPI controller");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(DRV_VERSION);
|
|
MODULE_ALIAS("platform:" DRV_NAME);
|