Skip to content

L
linux-davinci
Commit 3f31b874 authored by Adrian Bunk's avatar Adrian Bunk Committed by Bartlomiej Zolnierkiewicz
Browse files
Options

remove the broken ETRAX_IDE driver 

ETRAX_IDE was marked as broken last year with the comment
"it doesn't even compile currently".

Remove it since it won't get fixed in the near future.

On Mon, Apr 14, 2008 at 02:50:19PM +0200, Mikael Starvik wrote:
> You can remove it for now and we will resubmit a new if/when we get around
> to fix it.

[bart: ported it over IDE tree]
Signed-off-by: default avatarAdrian Bunk <bunk@kernel.org>
Cc: Mikael Starvik <mikael.starvik@axis.com>
Cc: Jesper Nilsson <Jesper.Nilsson@axis.com>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 55224bc8
Hide whitespace changes
Inline Side-by-side
Showing with 1 addition and 1189 deletions
drivers/ide/Kconfig
View file @ 3f31b874
......@@ -862,40 +862,6 @@ config BLK_DEV_IDE_BAST
Say Y here if you want to support the onboard IDE channels on the
Simtec BAST or the Thorcom VR1000
config ETRAX_IDE
tristate "ETRAX IDE support"
depends on CRIS && BROKEN
select BLK_DEV_IDEDMA
help
Enables the ETRAX IDE driver.
You can't use parallel ports or SCSI ports at the same time.
config ETRAX_IDE_DELAY
int "Delay for drives to regain consciousness"
depends on ETRAX_IDE && ETRAX_ARCH_V10
default 15
help
Number of seconds to wait for IDE drives to spin up after an IDE
reset.
choice
prompt "IDE reset pin"
depends on ETRAX_IDE && ETRAX_ARCH_V10
default ETRAX_IDE_PB7_RESET
config ETRAX_IDE_PB7_RESET
bool "Port_PB_Bit_7"
help
IDE reset on pin 7 on port B
config ETRAX_IDE_G27_RESET
bool "Port_G_Bit_27"
help
IDE reset on pin 27 on port G
endchoice
config IDE_H8300
tristate "H8300 IDE support"
depends on H8300
......
drivers/ide/Makefile
View file @ 3f31b874
......@@ -35,7 +35,7 @@ ifeq ($(CONFIG_BLK_DEV_CMD640), y)
obj-y += cmd640-core.o
endif
obj-$(CONFIG_BLK_DEV_IDE) += cris/ ppc/
obj-$(CONFIG_BLK_DEV_IDE) += ppc/
obj-$(CONFIG_IDE_H8300) += h8300/
obj-$(CONFIG_IDE_GENERIC) += ide-generic.o
obj-$(CONFIG_BLK_DEV_IDEPNP) += ide-pnp.o
......
drivers/ide/cris/Makefile deleted 100644 → 0
View file @ 55224bc8
EXTRA_CFLAGS += -Idrivers/ide
obj-$(CONFIG_IDE_ETRAX) += ide-cris.o
drivers/ide/cris/ide-cris.c deleted 100644 → 0
View file @ 55224bc8
/*
* Etrax specific IDE functions, like init and PIO-mode setting etc.
* Almost the entire ide.c is used for the rest of the Etrax ATA driver.
* Copyright (c) 2000-2005 Axis Communications AB
*
* Authors: Bjorn Wesen (initial version)
* Mikael Starvik (crisv32 port)
*/
/* Regarding DMA:
*
* There are two forms of DMA - "DMA handshaking" between the interface and the drive,
* and DMA between the memory and the interface. We can ALWAYS use the latter, since it's
* something built-in in the Etrax. However only some drives support the DMA-mode handshaking
* on the ATA-bus. The normal PC driver and Triton interface disables memory-if DMA when the
* device can't do DMA handshaking for some stupid reason. We don't need to do that.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/blkdev.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/init.h>
#include <asm/io.h>
#include <asm/dma.h>
/* number of DMA descriptors */
#define MAX_DMA_DESCRS 64
/* number of times to retry busy-flags when reading/writing IDE-registers
* this can't be too high because a hung harddisk might cause the watchdog
* to trigger (sometimes INB and OUTB are called with irq's disabled)
*/
#define IDE_REGISTER_TIMEOUT 300
#define LOWDB(x)
#define D(x)
enum /* Transfer types */
{
TYPE_PIO,
TYPE_DMA,
TYPE_UDMA
};
/* CRISv32 specifics */
#ifdef CONFIG_ETRAX_ARCH_V32
#include <asm/arch/hwregs/ata_defs.h>
#include <asm/arch/hwregs/dma_defs.h>
#include <asm/arch/hwregs/dma.h>
#include <asm/arch/pinmux.h>
#define ATA_UDMA2_CYC 2
#define ATA_UDMA2_DVS 3
#define ATA_UDMA1_CYC 2
#define ATA_UDMA1_DVS 4
#define ATA_UDMA0_CYC 4
#define ATA_UDMA0_DVS 6
#define ATA_DMA2_STROBE 7
#define ATA_DMA2_HOLD 1
#define ATA_DMA1_STROBE 8
#define ATA_DMA1_HOLD 3
#define ATA_DMA0_STROBE 25
#define ATA_DMA0_HOLD 19
#define ATA_PIO4_SETUP 3
#define ATA_PIO4_STROBE 7
#define ATA_PIO4_HOLD 1
#define ATA_PIO3_SETUP 3
#define ATA_PIO3_STROBE 9
#define ATA_PIO3_HOLD 3
#define ATA_PIO2_SETUP 3
#define ATA_PIO2_STROBE 13
#define ATA_PIO2_HOLD 5
#define ATA_PIO1_SETUP 5
#define ATA_PIO1_STROBE 23
#define ATA_PIO1_HOLD 9
#define ATA_PIO0_SETUP 9
#define ATA_PIO0_STROBE 39
#define ATA_PIO0_HOLD 9
int
cris_ide_ack_intr(ide_hwif_t* hwif)
{
reg_ata_rw_ctrl2 ctrl2 = REG_TYPE_CONV(reg_ata_rw_ctrl2, int,
hwif->io_ports.data_addr);
REG_WR_INT(ata, regi_ata, rw_ack_intr, 1 << ctrl2.sel);
return 1;
}
static inline int
cris_ide_busy(void)
{
reg_ata_rs_stat_data stat_data;
stat_data = REG_RD(ata, regi_ata, rs_stat_data);
return stat_data.busy;
}
static inline int
cris_ide_ready(void)
{
return !cris_ide_busy();
}
static inline int
cris_ide_data_available(unsigned short* data)
{
reg_ata_rs_stat_data stat_data;
stat_data = REG_RD(ata, regi_ata, rs_stat_data);
*data = stat_data.data;
return stat_data.dav;
}
static void
cris_ide_write_command(unsigned long command)
{
REG_WR_INT(ata, regi_ata, rw_ctrl2, command); /* write data to the drive's register */
}
static void
cris_ide_set_speed(int type, int setup, int strobe, int hold)
{
reg_ata_rw_ctrl0 ctrl0 = REG_RD(ata, regi_ata, rw_ctrl0);
reg_ata_rw_ctrl1 ctrl1 = REG_RD(ata, regi_ata, rw_ctrl1);
if (type == TYPE_PIO) {
ctrl0.pio_setup = setup;
ctrl0.pio_strb = strobe;
ctrl0.pio_hold = hold;
} else if (type == TYPE_DMA) {
ctrl0.dma_strb = strobe;
ctrl0.dma_hold = hold;
} else if (type == TYPE_UDMA) {
ctrl1.udma_tcyc = setup;
ctrl1.udma_tdvs = strobe;
}
REG_WR(ata, regi_ata, rw_ctrl0, ctrl0);
REG_WR(ata, regi_ata, rw_ctrl1, ctrl1);
}
static unsigned long
cris_ide_base_address(int bus)
{
reg_ata_rw_ctrl2 ctrl2 = {0};
ctrl2.sel = bus;
return REG_TYPE_CONV(int, reg_ata_rw_ctrl2, ctrl2);
}
static unsigned long
cris_ide_reg_addr(unsigned long addr, int cs0, int cs1)
{
reg_ata_rw_ctrl2 ctrl2 = {0};
ctrl2.addr = addr;
ctrl2.cs1 = cs1;
ctrl2.cs0 = cs0;
return REG_TYPE_CONV(int, reg_ata_rw_ctrl2, ctrl2);
}
static __init void
cris_ide_reset(unsigned val)
{
reg_ata_rw_ctrl0 ctrl0 = {0};
ctrl0.rst = val ? regk_ata_active : regk_ata_inactive;
REG_WR(ata, regi_ata, rw_ctrl0, ctrl0);
}
static __init void
cris_ide_init(void)
{
reg_ata_rw_ctrl0 ctrl0 = {0};
reg_ata_rw_intr_mask intr_mask = {0};
ctrl0.en = regk_ata_yes;
REG_WR(ata, regi_ata, rw_ctrl0, ctrl0);
intr_mask.bus0 = regk_ata_yes;
intr_mask.bus1 = regk_ata_yes;
intr_mask.bus2 = regk_ata_yes;
intr_mask.bus3 = regk_ata_yes;
REG_WR(ata, regi_ata, rw_intr_mask, intr_mask);
crisv32_request_dma(2, "ETRAX FS built-in ATA", DMA_VERBOSE_ON_ERROR, 0, dma_ata);
crisv32_request_dma(3, "ETRAX FS built-in ATA", DMA_VERBOSE_ON_ERROR, 0, dma_ata);
crisv32_pinmux_alloc_fixed(pinmux_ata);
crisv32_pinmux_alloc_fixed(pinmux_ata0);
crisv32_pinmux_alloc_fixed(pinmux_ata1);
crisv32_pinmux_alloc_fixed(pinmux_ata2);
crisv32_pinmux_alloc_fixed(pinmux_ata3);
DMA_RESET(regi_dma2);
DMA_ENABLE(regi_dma2);
DMA_RESET(regi_dma3);
DMA_ENABLE(regi_dma3);
DMA_WR_CMD (regi_dma2, regk_dma_set_w_size2);
DMA_WR_CMD (regi_dma3, regk_dma_set_w_size2);
}
static dma_descr_context mycontext __attribute__ ((__aligned__(32)));
#define cris_dma_descr_type dma_descr_data
#define cris_pio_read regk_ata_rd
#define cris_ultra_mask 0x7
#define MAX_DESCR_SIZE 0xffffffffUL
static unsigned long
cris_ide_get_reg(unsigned long reg)
{
return (reg & 0x0e000000) >> 25;
}
static void
cris_ide_fill_descriptor(cris_dma_descr_type *d, void* buf, unsigned int len, int last)
{
d->buf = (char*)virt_to_phys(buf);
d->after = d->buf + len;
d->eol = last;
}
static void
cris_ide_start_dma(ide_drive_t *drive, cris_dma_descr_type *d, int dir,int type,int len)
{
ide_hwif_t *hwif = drive->hwif;
reg_ata_rw_ctrl2 ctrl2 = REG_TYPE_CONV(reg_ata_rw_ctrl2, int,
hwif->io_ports.data_addr);
reg_ata_rw_trf_cnt trf_cnt = {0};
mycontext.saved_data = (dma_descr_data*)virt_to_phys(d);
mycontext.saved_data_buf = d->buf;
/* start the dma channel */
DMA_START_CONTEXT(dir ? regi_dma3 : regi_dma2, virt_to_phys(&mycontext));
/* initiate a multi word dma read using PIO handshaking */
trf_cnt.cnt = len >> 1;
/* Due to a "feature" the transfer count has to be one extra word for UDMA. */
if (type == TYPE_UDMA)
trf_cnt.cnt++;
REG_WR(ata, regi_ata, rw_trf_cnt, trf_cnt);
ctrl2.rw = dir ? regk_ata_rd : regk_ata_wr;
ctrl2.trf_mode = regk_ata_dma;
ctrl2.hsh = type == TYPE_PIO ? regk_ata_pio :
type == TYPE_DMA ? regk_ata_dma : regk_ata_udma;
ctrl2.multi = regk_ata_yes;
ctrl2.dma_size = regk_ata_word;
REG_WR(ata, regi_ata, rw_ctrl2, ctrl2);
}
static void
cris_ide_wait_dma(int dir)
{
reg_dma_rw_stat status;
do
{
status = REG_RD(dma, dir ? regi_dma3 : regi_dma2, rw_stat);
} while(status.list_state != regk_dma_data_at_eol);
}
static int cris_dma_test_irq(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
int intr = REG_RD_INT(ata, regi_ata, r_intr);
reg_ata_rw_ctrl2 ctrl2 = REG_TYPE_CONV(reg_ata_rw_ctrl2, int,
hwif->io_ports.data_addr);
return intr & (1 << ctrl2.sel) ? 1 : 0;
}
static void cris_ide_initialize_dma(int dir)
{
}
#else
/* CRISv10 specifics */
#include <asm/arch/svinto.h>
#include <asm/arch/io_interface_mux.h>
/* PIO timing (in R_ATA_CONFIG)
*
* _____________________________
* ADDRESS : ________/
*
* _______________
* DIOR : ____________/ \__________
*
* _______________
* DATA : XXXXXXXXXXXXXXXX_______________XXXXXXXX
*
*
* DIOR is unbuffered while address and data is buffered.
* This creates two problems:
* 1. The DIOR pulse is to early (because it is unbuffered)
* 2. The rise time of DIOR is long
*
* There are at least three different plausible solutions
* 1. Use a pad capable of larger currents in Etrax
* 2. Use an external buffer
* 3. Make the strobe pulse longer
*
* Some of the strobe timings below are modified to compensate
* for this. This implies a slight performance decrease.
*
* THIS SHOULD NEVER BE CHANGED!
*
* TODO: Is this true for the latest LX boards still ?
*/
#define ATA_UDMA2_CYC 0 /* No UDMA supported, just to make it compile. */
#define ATA_UDMA2_DVS 0
#define ATA_UDMA1_CYC 0
#define ATA_UDMA1_DVS 0
#define ATA_UDMA0_CYC 0
#define ATA_UDMA0_DVS 0
#define ATA_DMA2_STROBE 4
#define ATA_DMA2_HOLD 0
#define ATA_DMA1_STROBE 4
#define ATA_DMA1_HOLD 1
#define ATA_DMA0_STROBE 12
#define ATA_DMA0_HOLD 9
#define ATA_PIO4_SETUP 1
#define ATA_PIO4_STROBE 5
#define ATA_PIO4_HOLD 0
#define ATA_PIO3_SETUP 1
#define ATA_PIO3_STROBE 5
#define ATA_PIO3_HOLD 1
#define ATA_PIO2_SETUP 1
#define ATA_PIO2_STROBE 6
#define ATA_PIO2_HOLD 2
#define ATA_PIO1_SETUP 2
#define ATA_PIO1_STROBE 11
#define ATA_PIO1_HOLD 4
#define ATA_PIO0_SETUP 4
#define ATA_PIO0_STROBE 19
#define ATA_PIO0_HOLD 4
int
cris_ide_ack_intr(ide_hwif_t* hwif)
{
return 1;
}
static inline int
cris_ide_busy(void)
{
return *R_ATA_STATUS_DATA & IO_MASK(R_ATA_STATUS_DATA, busy) ;
}
static inline int
cris_ide_ready(void)
{
return *R_ATA_STATUS_DATA & IO_MASK(R_ATA_STATUS_DATA, tr_rdy) ;
}
static inline int
cris_ide_data_available(unsigned short* data)
{
unsigned long status = *R_ATA_STATUS_DATA;
*data = (unsigned short)status;
return status & IO_MASK(R_ATA_STATUS_DATA, dav);
}
static void
cris_ide_write_command(unsigned long command)
{
*R_ATA_CTRL_DATA = command;
}
static void
cris_ide_set_speed(int type, int setup, int strobe, int hold)
{
static int pio_setup = ATA_PIO4_SETUP;
static int pio_strobe = ATA_PIO4_STROBE;
static int pio_hold = ATA_PIO4_HOLD;
static int dma_strobe = ATA_DMA2_STROBE;
static int dma_hold = ATA_DMA2_HOLD;
if (type == TYPE_PIO) {
pio_setup = setup;
pio_strobe = strobe;
pio_hold = hold;
} else if (type == TYPE_DMA) {
dma_strobe = strobe;
dma_hold = hold;
}
*R_ATA_CONFIG = ( IO_FIELD( R_ATA_CONFIG, enable, 1 ) |
IO_FIELD( R_ATA_CONFIG, dma_strobe, dma_strobe ) |
IO_FIELD( R_ATA_CONFIG, dma_hold, dma_hold ) |
IO_FIELD( R_ATA_CONFIG, pio_setup, pio_setup ) |
IO_FIELD( R_ATA_CONFIG, pio_strobe, pio_strobe ) |
IO_FIELD( R_ATA_CONFIG, pio_hold, pio_hold ) );
}
static unsigned long
cris_ide_base_address(int bus)
{
return IO_FIELD(R_ATA_CTRL_DATA, sel, bus);
}
static unsigned long
cris_ide_reg_addr(unsigned long addr, int cs0, int cs1)
{
return IO_FIELD(R_ATA_CTRL_DATA, addr, addr) |
IO_FIELD(R_ATA_CTRL_DATA, cs0, cs0) |
IO_FIELD(R_ATA_CTRL_DATA, cs1, cs1);
}
static __init void
cris_ide_reset(unsigned val)
{
#ifdef CONFIG_ETRAX_IDE_G27_RESET
REG_SHADOW_SET(R_PORT_G_DATA, port_g_data_shadow, 27, val);
#endif
#ifdef CONFIG_ETRAX_IDE_PB7_RESET
port_pb_dir_shadow = port_pb_dir_shadow |
IO_STATE(R_PORT_PB_DIR, dir7, output);
*R_PORT_PB_DIR = port_pb_dir_shadow;
REG_SHADOW_SET(R_PORT_PB_DATA, port_pb_data_shadow, 7, val);
#endif
}
static __init void
cris_ide_init(void)
{
volatile unsigned int dummy;
*R_ATA_CTRL_DATA = 0;
*R_ATA_TRANSFER_CNT = 0;
*R_ATA_CONFIG = 0;
if (cris_request_io_interface(if_ata, "ETRAX100LX IDE")) {
printk(KERN_CRIT "ide: Failed to get IO interface\n");
return;
} else if (cris_request_dma(ATA_TX_DMA_NBR,
"ETRAX100LX IDE TX",
DMA_VERBOSE_ON_ERROR,
dma_ata)) {
cris_free_io_interface(if_ata);
printk(KERN_CRIT "ide: Failed to get Tx DMA channel\n");
return;
} else if (cris_request_dma(ATA_RX_DMA_NBR,
"ETRAX100LX IDE RX",
DMA_VERBOSE_ON_ERROR,
dma_ata)) {
cris_free_dma(ATA_TX_DMA_NBR, "ETRAX100LX IDE Tx");
cris_free_io_interface(if_ata);
printk(KERN_CRIT "ide: Failed to get Rx DMA channel\n");
return;
}
/* make a dummy read to set the ata controller in a proper state */
dummy = *R_ATA_STATUS_DATA;
*R_ATA_CONFIG = ( IO_FIELD( R_ATA_CONFIG, enable, 1 ));
*R_ATA_CTRL_DATA = ( IO_STATE( R_ATA_CTRL_DATA, rw, read) |
IO_FIELD( R_ATA_CTRL_DATA, addr, 1 ) );
while(*R_ATA_STATUS_DATA & IO_MASK(R_ATA_STATUS_DATA, busy)); /* wait for busy flag*/
*R_IRQ_MASK0_SET = ( IO_STATE( R_IRQ_MASK0_SET, ata_irq0, set ) |
IO_STATE( R_IRQ_MASK0_SET, ata_irq1, set ) |
IO_STATE( R_IRQ_MASK0_SET, ata_irq2, set ) |
IO_STATE( R_IRQ_MASK0_SET, ata_irq3, set ) );
/* reset the dma channels we will use */
RESET_DMA(ATA_TX_DMA_NBR);
RESET_DMA(ATA_RX_DMA_NBR);
WAIT_DMA(ATA_TX_DMA_NBR);
WAIT_DMA(ATA_RX_DMA_NBR);
}
#define cris_dma_descr_type etrax_dma_descr
#define cris_pio_read IO_STATE(R_ATA_CTRL_DATA, rw, read)
#define cris_ultra_mask 0x0
#define MAX_DESCR_SIZE 0x10000UL
static unsigned long
cris_ide_get_reg(unsigned long reg)
{
return (reg & 0x0e000000) >> 25;
}
static void
cris_ide_fill_descriptor(cris_dma_descr_type *d, void* buf, unsigned int len, int last)
{
d->buf = virt_to_phys(buf);
d->sw_len = len == MAX_DESCR_SIZE ? 0 : len;
if (last)
d->ctrl |= d_eol;
}
static void cris_ide_start_dma(ide_drive_t *drive, cris_dma_descr_type *d, int dir, int type, int len)
{
unsigned long cmd;
if (dir) {
/* need to do this before RX DMA due to a chip bug
* it is enough to just flush the part of the cache that
* corresponds to the buffers we start, but since HD transfers
* usually are more than 8 kB, it is easier to optimize for the
* normal case and just flush the entire cache. its the only
* way to be sure! (OB movie quote)
*/
flush_etrax_cache();
*R_DMA_CH3_FIRST = virt_to_phys(d);
*R_DMA_CH3_CMD = IO_STATE(R_DMA_CH3_CMD, cmd, start);
} else {
*R_DMA_CH2_FIRST = virt_to_phys(d);
*R_DMA_CH2_CMD = IO_STATE(R_DMA_CH2_CMD, cmd, start);
}
/* initiate a multi word dma read using DMA handshaking */
*R_ATA_TRANSFER_CNT =
IO_FIELD(R_ATA_TRANSFER_CNT, count, len >> 1);
cmd = dir ? IO_STATE(R_ATA_CTRL_DATA, rw, read) : IO_STATE(R_ATA_CTRL_DATA, rw, write);
cmd |= type == TYPE_PIO ? IO_STATE(R_ATA_CTRL_DATA, handsh, pio) :
IO_STATE(R_ATA_CTRL_DATA, handsh, dma);
*R_ATA_CTRL_DATA =
cmd |
IO_FIELD(R_ATA_CTRL_DATA, data,
drive->hwif->io_ports.data_addr) |
IO_STATE(R_ATA_CTRL_DATA, src_dst, dma) |
IO_STATE(R_ATA_CTRL_DATA, multi, on) |
IO_STATE(R_ATA_CTRL_DATA, dma_size, word);
}
static void
cris_ide_wait_dma(int dir)
{
if (dir)
WAIT_DMA(ATA_RX_DMA_NBR);
else
WAIT_DMA(ATA_TX_DMA_NBR);
}
static int cris_dma_test_irq(ide_drive_t *drive)
{
int intr = *R_IRQ_MASK0_RD;
int bus = IO_EXTRACT(R_ATA_CTRL_DATA, sel,
drive->hwif->io_ports.data_addr);
return intr & (1 << (bus + IO_BITNR(R_IRQ_MASK0_RD, ata_irq0))) ? 1 : 0;
}
static void cris_ide_initialize_dma(int dir)
{
if (dir)
{
RESET_DMA(ATA_RX_DMA_NBR); /* sometimes the DMA channel get stuck so we need to do this */
WAIT_DMA(ATA_RX_DMA_NBR);
}
else
{
RESET_DMA(ATA_TX_DMA_NBR); /* sometimes the DMA channel get stuck so we need to do this */
WAIT_DMA(ATA_TX_DMA_NBR);
}
}
#endif
void
cris_ide_outw(unsigned short data, unsigned long reg) {
int timeleft;
LOWDB(printk("ow: data 0x%x, reg 0x%x\n", data, reg));
/* note the lack of handling any timeouts. we stop waiting, but we don't
* really notify anybody.
*/
timeleft = IDE_REGISTER_TIMEOUT;
/* wait for busy flag */
do {
timeleft--;
} while(timeleft && cris_ide_busy());
/*
* Fall through at a timeout, so the ongoing command will be
* aborted by the write below, which is expected to be a dummy
* command to the command register. This happens when a faulty
* drive times out on a command. See comment on timeout in
* INB.
*/
if(!timeleft)
printk("ATA timeout reg 0x%lx := 0x%x\n", reg, data);
cris_ide_write_command(reg|data); /* write data to the drive's register */
timeleft = IDE_REGISTER_TIMEOUT;
/* wait for transmitter ready */
do {
timeleft--;
} while(timeleft && !cris_ide_ready());
}
void
cris_ide_outb(unsigned char data, unsigned long reg)
{
cris_ide_outw(data, reg);
}
void
cris_ide_outbsync(ide_drive_t *drive, u8 addr, unsigned long port)
{
cris_ide_outw(addr, port);
}
unsigned short
cris_ide_inw(unsigned long reg) {
int timeleft;
unsigned short val;
timeleft = IDE_REGISTER_TIMEOUT;
/* wait for busy flag */
do {
timeleft--;
} while(timeleft && cris_ide_busy());
if(!timeleft) {
/*
* If we're asked to read the status register, like for
* example when a command does not complete for an
* extended time, but the ATA interface is stuck in a
* busy state at the *ETRAX* ATA interface level (as has
* happened repeatedly with at least one bad disk), then
* the best thing to do is to pretend that we read
* "busy" in the status register, so the IDE driver will
* time-out, abort the ongoing command and perform a
* reset sequence. Note that the subsequent OUT_BYTE
* call will also timeout on busy, but as long as the
* write is still performed, everything will be fine.
*/
if (cris_ide_get_reg(reg) == 7)
return BUSY_STAT;
else
/* For other rare cases we assume 0 is good enough. */
return 0;
}
cris_ide_write_command(reg | cris_pio_read);
timeleft = IDE_REGISTER_TIMEOUT;
/* wait for available */
do {
timeleft--;
} while(timeleft && !cris_ide_data_available(&val));
if(!timeleft)
return 0;
LOWDB(printk("inb: 0x%x from reg 0x%x\n", val & 0xff, reg));
return val;
}
unsigned char
cris_ide_inb(unsigned long reg)
{
return (unsigned char)cris_ide_inw(reg);
}
static void cris_input_data(ide_drive_t *, struct request *, void *, unsigned);
static void cris_output_data(ide_drive_t *, struct request *, void *, unsigned);
static void cris_dma_host_set(ide_drive_t *drive, int on)
{
}
static void cris_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
int setup, strobe, hold;
switch(pio)
{
case 0:
setup = ATA_PIO0_SETUP;
strobe = ATA_PIO0_STROBE;
hold = ATA_PIO0_HOLD;
break;
case 1:
setup = ATA_PIO1_SETUP;
strobe = ATA_PIO1_STROBE;
hold = ATA_PIO1_HOLD;
break;
case 2:
setup = ATA_PIO2_SETUP;
strobe = ATA_PIO2_STROBE;
hold = ATA_PIO2_HOLD;
break;
case 3:
setup = ATA_PIO3_SETUP;
strobe = ATA_PIO3_STROBE;
hold = ATA_PIO3_HOLD;
break;
case 4:
setup = ATA_PIO4_SETUP;
strobe = ATA_PIO4_STROBE;
hold = ATA_PIO4_HOLD;
break;
default:
return;
}
cris_ide_set_speed(TYPE_PIO, setup, strobe, hold);
}
static void cris_set_dma_mode(ide_drive_t *drive, const u8 speed)
{
int cyc = 0, dvs = 0, strobe = 0, hold = 0;
switch(speed)
{
case XFER_UDMA_0:
cyc = ATA_UDMA0_CYC;
dvs = ATA_UDMA0_DVS;
break;
case XFER_UDMA_1:
cyc = ATA_UDMA1_CYC;
dvs = ATA_UDMA1_DVS;
break;
case XFER_UDMA_2:
cyc = ATA_UDMA2_CYC;
dvs = ATA_UDMA2_DVS;
break;
case XFER_MW_DMA_0:
strobe = ATA_DMA0_STROBE;
hold = ATA_DMA0_HOLD;
break;
case XFER_MW_DMA_1:
strobe = ATA_DMA1_STROBE;
hold = ATA_DMA1_HOLD;
break;
case XFER_MW_DMA_2:
strobe = ATA_DMA2_STROBE;
hold = ATA_DMA2_HOLD;
break;
}
if (speed >= XFER_UDMA_0)
cris_ide_set_speed(TYPE_UDMA, cyc, dvs, 0);
else
cris_ide_set_speed(TYPE_DMA, 0, strobe, hold);
}
static void __init cris_setup_ports(hw_regs_t *hw, unsigned long base)
{
int i;
memset(hw, 0, sizeof(*hw));
for (i = 0; i <= 7; i++)
hw->io_ports_array[i] = base + cris_ide_reg_addr(i, 0, 1);
/*
* the IDE control register is at ATA address 6,
* with CS1 active instead of CS0
*/
hw->io_ports.ctl_addr = base + cris_ide_reg_addr(6, 1, 0);
hw->irq = ide_default_irq(0);
hw->ack_intr = cris_ide_ack_intr;
}
static void cris_tf_load(ide_drive_t *drive, ide_task_t *task)
{
struct ide_io_ports *io_ports = &drive->hwif->io_ports;
struct ide_taskfile *tf = &task->tf;
u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
if (task->tf_flags & IDE_TFLAG_FLAGGED)
HIHI = 0xFF;
ide_set_irq(drive, 1);
if (task->tf_flags & IDE_TFLAG_OUT_DATA)
cris_ide_outw((tf->hob_data << 8) | tf->data,
io_ports->data_addr);
if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
cris_ide_outb(tf->hob_feature, io_ports->feature_addr);
if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
cris_ide_outb(tf->hob_nsect, io_ports->nsect_addr);
if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
cris_ide_outb(tf->hob_lbal, io_ports->lbal_addr);
if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
cris_ide_outb(tf->hob_lbam, io_ports->lbam_addr);
if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
cris_ide_outb(tf->hob_lbah, io_ports->lbah_addr);
if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
cris_ide_outb(tf->feature, io_ports->feature_addr);
if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
cris_ide_outb(tf->nsect, io_ports->nsect_addr);
if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
cris_ide_outb(tf->lbal, io_ports->lbal_addr);
if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
cris_ide_outb(tf->lbam, io_ports->lbam_addr);
if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
cris_ide_outb(tf->lbah, io_ports->lbah_addr);
if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
cris_ide_outb((tf->device & HIHI) | drive->select.all,
io_ports->device_addr);
}
static void cris_tf_read(ide_drive_t *drive, ide_task_t *task)
{
struct ide_io_ports *io_ports = &drive->hwif->io_ports;
struct ide_taskfile *tf = &task->tf;
if (task->tf_flags & IDE_TFLAG_IN_DATA) {
u16 data = cris_ide_inw(io_ports->data_addr);
tf->data = data & 0xff;
tf->hob_data = (data >> 8) & 0xff;
}
/* be sure we're looking at the low order bits */
cris_ide_outb(drive->ctl & ~0x80, io_ports->ctl_addr);
if (task->tf_flags & IDE_TFLAG_IN_NSECT)
tf->nsect = cris_ide_inb(io_ports->nsect_addr);
if (task->tf_flags & IDE_TFLAG_IN_LBAL)
tf->lbal = cris_ide_inb(io_ports->lbal_addr);
if (task->tf_flags & IDE_TFLAG_IN_LBAM)
tf->lbam = cris_ide_inb(io_ports->lbam_addr);
if (task->tf_flags & IDE_TFLAG_IN_LBAH)
tf->lbah = cris_ide_inb(io_ports->lbah_addr);
if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
tf->device = cris_ide_inb(io_ports->device_addr);
if (task->tf_flags & IDE_TFLAG_LBA48) {
cris_ide_outb(drive->ctl | 0x80, io_ports->ctl_addr);
if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
tf->hob_feature = cris_ide_inb(io_ports->feature_addr);
if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
tf->hob_nsect = cris_ide_inb(io_ports->nsect_addr);
if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
tf->hob_lbal = cris_ide_inb(io_ports->lbal_addr);
if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
tf->hob_lbam = cris_ide_inb(io_ports->lbam_addr);
if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
tf->hob_lbah = cris_ide_inb(io_ports->lbah_addr);
}
}
static const struct ide_port_ops cris_port_ops = {
.set_pio_mode = cris_set_pio_mode,
.set_dma_mode = cris_set_dma_mode,
};
static const struct ide_dma_ops cris_dma_ops;
static const struct ide_port_info cris_port_info __initdata = {
.chipset = ide_etrax100,
.port_ops = &cris_port_ops,
.dma_ops = &cris_dma_ops,
.host_flags = IDE_HFLAG_NO_ATAPI_DMA |
IDE_HFLAG_NO_DMA, /* no SFF-style DMA */
.pio_mask = ATA_PIO4,
.udma_mask = cris_ultra_mask,
.mwdma_mask = ATA_MWDMA2,
};
static int __init init_e100_ide(void)
{
hw_regs_t hw;
int h;
u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
printk("ide: ETRAX FS built-in ATA DMA controller\n");
for (h = 0; h < 4; h++) {
ide_hwif_t *hwif = NULL;
cris_setup_ports(&hw, cris_ide_base_address(h));
hwif = ide_find_port();
if (hwif == NULL)
continue;
ide_init_port_data(hwif, hwif->index);
ide_init_port_hw(hwif, &hw);
hwif->tf_load = cris_tf_load;
hwif->tf_read = cris_tf_read;
hwif->input_data = cris_input_data;
hwif->output_data = cris_output_data;
hwif->OUTB = &cris_ide_outb;
hwif->OUTBSYNC = &cris_ide_outbsync;
hwif->INB = &cris_ide_inb;
hwif->cbl = ATA_CBL_PATA40;
idx[h] = hwif->index;
}
/* Reset pulse */
cris_ide_reset(0);
udelay(25);
cris_ide_reset(1);
cris_ide_init();
cris_ide_set_speed(TYPE_PIO, ATA_PIO4_SETUP, ATA_PIO4_STROBE, ATA_PIO4_HOLD);
cris_ide_set_speed(TYPE_DMA, 0, ATA_DMA2_STROBE, ATA_DMA2_HOLD);
cris_ide_set_speed(TYPE_UDMA, ATA_UDMA2_CYC, ATA_UDMA2_DVS, 0);
ide_device_add(idx, &cris_port_info);
return 0;
}
static cris_dma_descr_type mydescr __attribute__ ((__aligned__(16)));
/*
* This is used for most PIO data transfers *from* the IDE interface
*
* These routines will round up any request for an odd number of bytes,
* so if an odd bytecount is specified, be sure that there's at least one
* extra byte allocated for the buffer.
*/
static void cris_input_data(ide_drive_t *drive, struct request *rq,
void *buffer, unsigned int bytecount)
{
D(printk("input_data, buffer 0x%x, count %d\n", buffer, bytecount));
if(bytecount & 1) {
printk("warning, odd bytecount in cdrom_in_bytes = %d.\n", bytecount);
bytecount++; /* to round off */
}
/* setup DMA and start transfer */
cris_ide_fill_descriptor(&mydescr, buffer, bytecount, 1);
cris_ide_start_dma(drive, &mydescr, 1, TYPE_PIO, bytecount);
/* wait for completion */
LED_DISK_READ(1);
cris_ide_wait_dma(1);
LED_DISK_READ(0);
}
/*
* This is used for most PIO data transfers *to* the IDE interface
*/
static void cris_output_data(ide_drive_t *drive, struct request *rq,
void *buffer, unsigned int bytecount)
{
D(printk("output_data, buffer 0x%x, count %d\n", buffer, bytecount));
if(bytecount & 1) {
printk("odd bytecount %d in atapi_out_bytes!\n", bytecount);
bytecount++;
}
cris_ide_fill_descriptor(&mydescr, buffer, bytecount, 1);
cris_ide_start_dma(drive, &mydescr, 0, TYPE_PIO, bytecount);
/* wait for completion */
LED_DISK_WRITE(1);
LED_DISK_READ(1);
cris_ide_wait_dma(0);
LED_DISK_WRITE(0);
}
/* we only have one DMA channel on the chip for ATA, so we can keep these statically */
static cris_dma_descr_type ata_descrs[MAX_DMA_DESCRS] __attribute__ ((__aligned__(16)));
static unsigned int ata_tot_size;
/*
* cris_ide_build_dmatable() prepares a dma request.
* Returns 0 if all went okay, returns 1 otherwise.
*/
static int cris_ide_build_dmatable (ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
struct scatterlist* sg;
struct request *rq = drive->hwif->hwgroup->rq;
unsigned long size, addr;
unsigned int count = 0;
int i = 0;
sg = hwif->sg_table;
ata_tot_size = 0;
ide_map_sg(drive, rq);
i = hwif->sg_nents;
while(i) {
/*
* Determine addr and size of next buffer area. We assume that
* individual virtual buffers are always composed linearly in
* physical memory. For example, we assume that any 8kB buffer
* is always composed of two adjacent physical 4kB pages rather
* than two possibly non-adjacent physical 4kB pages.
*/
/* group sequential buffers into one large buffer */
addr = sg_phys(sg);
size = sg_dma_len(sg);
while (--i) {
sg = sg_next(sg);
if ((addr + size) != sg_phys(sg))
break;
size += sg_dma_len(sg);
}
/* did we run out of descriptors? */
if(count >= MAX_DMA_DESCRS) {
printk("%s: too few DMA descriptors\n", drive->name);
return 1;
}
/* however, this case is more difficult - rw_trf_cnt cannot be more
than 65536 words per transfer, so in that case we need to either
1) use a DMA interrupt to re-trigger rw_trf_cnt and continue with
the descriptors, or
2) simply do the request here, and get dma_intr to only ide_end_request on
those blocks that were actually set-up for transfer.
*/
if(ata_tot_size + size > 131072) {
printk("too large total ATA DMA request, %d + %d!\n", ata_tot_size, (int)size);
return 1;
}
/* If size > MAX_DESCR_SIZE it has to be splitted into new descriptors. Since we
don't handle size > 131072 only one split is necessary */
if(size > MAX_DESCR_SIZE) {
cris_ide_fill_descriptor(&ata_descrs[count], (void*)addr, MAX_DESCR_SIZE, 0);
count++;
ata_tot_size += MAX_DESCR_SIZE;
size -= MAX_DESCR_SIZE;
addr += MAX_DESCR_SIZE;
}
cris_ide_fill_descriptor(&ata_descrs[count], (void*)addr, size,i ? 0 : 1);
count++;
ata_tot_size += size;
}
if (count) {
/* return and say all is ok */
return 0;
}
printk("%s: empty DMA table?\n", drive->name);
return 1; /* let the PIO routines handle this weirdness */
}
/*
* cris_dma_intr() is the handler for disk read/write DMA interrupts
*/
static ide_startstop_t cris_dma_intr (ide_drive_t *drive)
{
LED_DISK_READ(0);
LED_DISK_WRITE(0);
return ide_dma_intr(drive);
}
/*
* Functions below initiates/aborts DMA read/write operations on a drive.
*
* The caller is assumed to have selected the drive and programmed the drive's
* sector address using CHS or LBA. All that remains is to prepare for DMA
* and then issue the actual read/write DMA/PIO command to the drive.
*
* For ATAPI devices, we just prepare for DMA and return. The caller should
* then issue the packet command to the drive and call us again with
* cris_dma_start afterwards.
*
* Returns 0 if all went well.
* Returns 1 if DMA read/write could not be started, in which case
* the caller should revert to PIO for the current request.
*/
static int cris_dma_end(ide_drive_t *drive)
{
drive->waiting_for_dma = 0;
return 0;
}
static int cris_dma_setup(ide_drive_t *drive)
{
struct request *rq = drive->hwif->hwgroup->rq;
cris_ide_initialize_dma(!rq_data_dir(rq));
if (cris_ide_build_dmatable (drive)) {
ide_map_sg(drive, rq);
return 1;
}
drive->waiting_for_dma = 1;
return 0;
}
static void cris_dma_exec_cmd(ide_drive_t *drive, u8 command)
{
ide_execute_command(drive, command, &cris_dma_intr, WAIT_CMD, NULL);
}
static void cris_dma_start(ide_drive_t *drive)
{
struct request *rq = drive->hwif->hwgroup->rq;
int writing = rq_data_dir(rq);
int type = TYPE_DMA;
if (drive->current_speed >= XFER_UDMA_0)
type = TYPE_UDMA;
cris_ide_start_dma(drive, &ata_descrs[0], writing ? 0 : 1, type, ata_tot_size);
if (writing) {
LED_DISK_WRITE(1);
} else {
LED_DISK_READ(1);
}
}
static const struct ide_dma_ops cris_dma_ops = {
.dma_host_set = cris_dma_host_set,
.dma_setup = cris_dma_setup,
.dma_exec_cmd = cris_dma_exec_cmd,
.dma_start = cris_dma_start,
.dma_end = cris_dma_end,
.dma_test_irq = cris_dma_test_irq,
};
module_init(init_e100_ide);
MODULE_LICENSE("GPL");
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment