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u-boot/drivers/block/pata_bfin.c
Mike Frysinger c5dc48295b Blackfin: pata_bfin: convert to portmux framework 
Rather than bang MMRs directly, use the new portmux framework to handle
the details.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-07-13 17:50:49 -04:00

1200 lines
30 KiB
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/*
* Driver for Blackfin on-chip ATAPI controller.
*
* Enter bugs at http://blackfin.uclinux.org/
*
* Copyright (c) 2008 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#include <common.h>
#include <command.h>
#include <config.h>
#include <asm/byteorder.h>
#include <asm/io.h>
#include <asm/errno.h>
#include <asm/portmux.h>
#include <asm/mach-common/bits/pata.h>
#include <ata.h>
#include <libata.h>
#include "pata_bfin.h"
static struct ata_port port[CONFIG_SYS_SATA_MAX_DEVICE];
/**
* PIO Mode - Frequency compatibility
*/
/* mode: 0 1 2 3 4 */
static const u32 pio_fsclk[] =
{ 33333333, 33333333, 33333333, 33333333, 33333333 };
/**
* MDMA Mode - Frequency compatibility
*/
/* mode: 0 1 2 */
static const u32 mdma_fsclk[] = { 33333333, 33333333, 33333333 };
/**
* UDMA Mode - Frequency compatibility
*
* UDMA5 - 100 MB/s - SCLK = 133 MHz
* UDMA4 - 66 MB/s - SCLK >= 80 MHz
* UDMA3 - 44.4 MB/s - SCLK >= 50 MHz
* UDMA2 - 33 MB/s - SCLK >= 40 MHz
*/
/* mode: 0 1 2 3 4 5 */
static const u32 udma_fsclk[] =
{ 33333333, 33333333, 40000000, 50000000, 80000000, 133333333 };
/**
* Register transfer timing table
*/
/* mode: 0 1 2 3 4 */
/* Cycle Time */
static const u32 reg_t0min[] = { 600, 383, 330, 180, 120 };
/* DIOR/DIOW to end cycle */
static const u32 reg_t2min[] = { 290, 290, 290, 70, 25 };
/* DIOR/DIOW asserted pulse width */
static const u32 reg_teocmin[] = { 290, 290, 290, 80, 70 };
/**
* PIO timing table
*/
/* mode: 0 1 2 3 4 */
/* Cycle Time */
static const u32 pio_t0min[] = { 600, 383, 240, 180, 120 };
/* Address valid to DIOR/DIORW */
static const u32 pio_t1min[] = { 70, 50, 30, 30, 25 };
/* DIOR/DIOW to end cycle */
static const u32 pio_t2min[] = { 165, 125, 100, 80, 70 };
/* DIOR/DIOW asserted pulse width */
static const u32 pio_teocmin[] = { 165, 125, 100, 70, 25 };
/* DIOW data hold */
static const u32 pio_t4min[] = { 30, 20, 15, 10, 10 };
/* ******************************************************************
* Multiword DMA timing table
* ******************************************************************
*/
/* mode: 0 1 2 */
/* Cycle Time */
static const u32 mdma_t0min[] = { 480, 150, 120 };
/* DIOR/DIOW asserted pulse width */
static const u32 mdma_tdmin[] = { 215, 80, 70 };
/* DMACK to read data released */
static const u32 mdma_thmin[] = { 20, 15, 10 };
/* DIOR/DIOW to DMACK hold */
static const u32 mdma_tjmin[] = { 20, 5, 5 };
/* DIOR negated pulse width */
static const u32 mdma_tkrmin[] = { 50, 50, 25 };
/* DIOR negated pulse width */
static const u32 mdma_tkwmin[] = { 215, 50, 25 };
/* CS[1:0] valid to DIOR/DIOW */
static const u32 mdma_tmmin[] = { 50, 30, 25 };
/* DMACK to read data released */
static const u32 mdma_tzmax[] = { 20, 25, 25 };
/**
* Ultra DMA timing table
*/
/* mode: 0 1 2 3 4 5 */
static const u32 udma_tcycmin[] = { 112, 73, 54, 39, 25, 17 };
static const u32 udma_tdvsmin[] = { 70, 48, 31, 20, 7, 5 };
static const u32 udma_tenvmax[] = { 70, 70, 70, 55, 55, 50 };
static const u32 udma_trpmin[] = { 160, 125, 100, 100, 100, 85 };
static const u32 udma_tmin[] = { 5, 5, 5, 5, 3, 3 };
static const u32 udma_tmlimin = 20;
static const u32 udma_tzahmin = 20;
static const u32 udma_tenvmin = 20;
static const u32 udma_tackmin = 20;
static const u32 udma_tssmin = 50;
static void msleep(int count)
{
int i;
for (i = 0; i < count; i++)
udelay(1000);
}
/**
*
* Function: num_clocks_min
*
* Description:
* calculate number of SCLK cycles to meet minimum timing
*/
static unsigned short num_clocks_min(unsigned long tmin,
unsigned long fsclk)
{
unsigned long tmp ;
unsigned short result;
tmp = tmin * (fsclk/1000/1000) / 1000;
result = (unsigned short)tmp;
if ((tmp*1000*1000) < (tmin*(fsclk/1000)))
result++;
return result;
}
/**
* bfin_set_piomode - Initialize host controller PATA PIO timings
* @ap: Port whose timings we are configuring
* @pio_mode: mode
*
* Set PIO mode for device.
*
* LOCKING:
* None (inherited from caller).
*/
static void bfin_set_piomode(struct ata_port *ap, int pio_mode)
{
int mode = pio_mode - XFER_PIO_0;
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
unsigned int fsclk = get_sclk();
unsigned short teoc_reg, t2_reg, teoc_pio;
unsigned short t4_reg, t2_pio, t1_reg;
unsigned short n0, n6, t6min = 5;
/* the most restrictive timing value is t6 and tc, the DIOW - data hold
* If one SCLK pulse is longer than this minimum value then register
* transfers cannot be supported at this frequency.
*/
n6 = num_clocks_min(t6min, fsclk);
if (mode >= 0 && mode <= 4 && n6 >= 1) {
debug("set piomode: mode=%d, fsclk=%ud\n", mode, fsclk);
/* calculate the timing values for register transfers. */
while (mode > 0 && pio_fsclk[mode] > fsclk)
mode--;
/* DIOR/DIOW to end cycle time */
t2_reg = num_clocks_min(reg_t2min[mode], fsclk);
/* DIOR/DIOW asserted pulse width */
teoc_reg = num_clocks_min(reg_teocmin[mode], fsclk);
/* Cycle Time */
n0 = num_clocks_min(reg_t0min[mode], fsclk);
/* increase t2 until we meed the minimum cycle length */
if (t2_reg + teoc_reg < n0)
t2_reg = n0 - teoc_reg;
/* calculate the timing values for pio transfers. */
/* DIOR/DIOW to end cycle time */
t2_pio = num_clocks_min(pio_t2min[mode], fsclk);
/* DIOR/DIOW asserted pulse width */
teoc_pio = num_clocks_min(pio_teocmin[mode], fsclk);
/* Cycle Time */
n0 = num_clocks_min(pio_t0min[mode], fsclk);
/* increase t2 until we meed the minimum cycle length */
if (t2_pio + teoc_pio < n0)
t2_pio = n0 - teoc_pio;
/* Address valid to DIOR/DIORW */
t1_reg = num_clocks_min(pio_t1min[mode], fsclk);
/* DIOW data hold */
t4_reg = num_clocks_min(pio_t4min[mode], fsclk);
ATAPI_SET_REG_TIM_0(base, (teoc_reg<<8 | t2_reg));
ATAPI_SET_PIO_TIM_0(base, (t4_reg<<12 | t2_pio<<4 | t1_reg));
ATAPI_SET_PIO_TIM_1(base, teoc_pio);
if (mode > 2) {
ATAPI_SET_CONTROL(base,
ATAPI_GET_CONTROL(base) | IORDY_EN);
} else {
ATAPI_SET_CONTROL(base,
ATAPI_GET_CONTROL(base) & ~IORDY_EN);
}
/* Disable host ATAPI PIO interrupts */
ATAPI_SET_INT_MASK(base, ATAPI_GET_INT_MASK(base)
& ~(PIO_DONE_MASK | HOST_TERM_XFER_MASK));
SSYNC();
}
}
/**
*
* 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;
for (i = 0; i < PATA_BFIN_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_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_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_ata_busy_wait - Wait for a port status register
* @ap: Port to wait for.
* @bits: bits that must be clear
* @max: number of 10uS waits to perform
*
* Waits up to max*10 microseconds for the selected bits in the port's
* status register to be cleared.
* Returns final value of status register.
*
* LOCKING:
* Inherited from caller.
*/
static inline u8 bfin_ata_busy_wait(struct ata_port *ap, unsigned int bits,
unsigned int max, u8 usealtstatus)
{
u8 status;
do {
udelay(10);
if (usealtstatus)
status = bfin_check_altstatus(ap);
else
status = bfin_check_status(ap);
max--;
} while (status != 0xff && (status & bits) && (max > 0));
return status;
}
/**
* bfin_ata_busy_sleep - sleep until BSY clears, or timeout
* @ap: port containing status register to be polled
* @tmout_pat: impatience timeout in msecs
* @tmout: overall timeout in msecs
*
* Sleep until ATA Status register bit BSY clears,
* or a timeout occurs.
*
* RETURNS:
* 0 on success, -errno otherwise.
*/
static int bfin_ata_busy_sleep(struct ata_port *ap,
long tmout_pat, unsigned long tmout)
{
u8 status;
status = bfin_ata_busy_wait(ap, ATA_BUSY, 300, 0);
while (status != 0xff && (status & ATA_BUSY) && tmout_pat > 0) {
msleep(50);
tmout_pat -= 50;
status = bfin_ata_busy_wait(ap, ATA_BUSY, 3, 0);
}
if (status != 0xff && (status & ATA_BUSY))
printf("port is slow to respond, please be patient "
"(Status 0x%x)\n", status);
while (status != 0xff && (status & ATA_BUSY) && tmout_pat > 0) {
msleep(50);
tmout_pat -= 50;
status = bfin_check_status(ap);
}
if (status == 0xff)
return -ENODEV;
if (status & ATA_BUSY) {
printf("port failed to respond "
"(%lu secs, Status 0x%x)\n",
DIV_ROUND_UP(tmout, 1000), status);
return -EBUSY;
}
return 0;
}
/**
* 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);
udelay(1);
}
/**
* 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);
long deadline;
/* if device 0 was found in ata_devchk, wait for its
* BSY bit to clear
*/
if (dev0)
bfin_ata_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_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 (deadline <= 0) {
dev1 = 0;
break;
}
msleep(50); /* give drive a breather */
deadline -= 50;
}
if (dev1)
bfin_ata_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_reg);
udelay(20);
write_atapi_register(base, ATA_REG_CTRL, ap->ctl_reg | ATA_SRST);
udelay(20);
write_atapi_register(base, ATA_REG_CTRL, ap->ctl_reg);
/* 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
*/
msleep(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
*
* Note: Original code is ata_sff_softreset().
*/
static int bfin_softreset(struct ata_port *ap)
{
unsigned int err_mask;
ap->dev_mask = 0;
/* determine if device 0/1 are present.
* only one device is supported on one port by now.
*/
if (bfin_devchk(ap, 0))
ap->dev_mask |= (1 << 0);
else if (bfin_devchk(ap, 1))
ap->dev_mask |= (1 << 1);
else
return -ENODEV;
/* select device 0 again */
bfin_dev_select(ap, 0);
/* issue bus reset */
err_mask = bfin_bus_softreset(ap, ap->dev_mask);
if (err_mask) {
printf("SRST failed (err_mask=0x%x)\n",
err_mask);
ap->dev_mask = 0;
return -EIO;
}
return 0;
}
/**
* bfin_irq_clear - Clear ATAPI interrupt.
* @ap: Port associated with this ATA transaction.
*
* Note: Original code is ata_sff_irq_clear().
*/
static void bfin_irq_clear(struct ata_port *ap)
{
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
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);
}
static u8 bfin_wait_for_irq(struct ata_port *ap, unsigned int max)
{
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
do {
if (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)) {
break;
}
udelay(1000);
max--;
} while ((max > 0));
return max == 0;
}
/**
* bfin_ata_reset_port - initialize BFIN ATAPI port.
*/
static int bfin_ata_reset_port(struct ata_port *ap)
{
void __iomem *base = (void __iomem *)ap->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;
}
/**
*
* Function: bfin_config_atapi_gpio
*
* Description: Configures the ATAPI pins for use
*
*/
static int bfin_config_atapi_gpio(struct ata_port *ap)
{
const unsigned short pins[] = {
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,
};
peripheral_request_list(pins, "pata_bfin");
return 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 bfin_ata_probe_port(struct ata_port *ap)
{
if (bfin_config_atapi_gpio(ap)) {
printf("Requesting Peripherals faild\n");
return -EFAULT;
}
if (bfin_ata_reset_port(ap)) {
printf("Fail to reset ATAPI device\n");
return -EFAULT;
}
if (ap->ata_mode >= XFER_PIO_0 && ap->ata_mode <= XFER_PIO_4)
bfin_set_piomode(ap, ap->ata_mode);
else {
printf("Given ATA data transfer mode is not supported.\n");
return -EFAULT;
}
return 0;
}
#define ATA_SECTOR_WORDS (ATA_SECT_SIZE/2)
static void bfin_ata_identify(struct ata_port *ap, int dev)
{
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
u8 status = 0;
static u16 iobuf[ATA_SECTOR_WORDS];
u64 n_sectors = 0;
hd_driveid_t *iop = (hd_driveid_t *)iobuf;
memset(iobuf, 0, sizeof(iobuf));
if (!(ap->dev_mask & (1 << dev)))
return;
debug("port=%d dev=%d\n", ap->port_no, dev);
bfin_dev_select(ap, dev);
status = 0;
/* Device Identify Command */
write_atapi_register(base, ATA_REG_CMD, ATA_CMD_ID_ATA);
bfin_check_altstatus(ap);
udelay(10);
status = bfin_ata_busy_wait(ap, ATA_BUSY, 1000, 0);
if (status & ATA_ERR) {
printf("\ndevice not responding\n");
ap->dev_mask &= ~(1 << dev);
return;
}
read_atapi_data(base, ATA_SECTOR_WORDS, iobuf);
ata_swap_buf_le16(iobuf, ATA_SECTOR_WORDS);
/* we require LBA and DMA support (bits 8 & 9 of word 49) */
if (!ata_id_has_dma(iobuf) || !ata_id_has_lba(iobuf))
printf("ata%u: no dma/lba\n", ap->port_no);
#ifdef DEBUG
ata_dump_id(iobuf);
#endif
n_sectors = ata_id_n_sectors(iobuf);
if (n_sectors == 0) {
ap->dev_mask &= ~(1 << dev);
return;
}
ata_id_c_string(iobuf, (unsigned char *)sata_dev_desc[ap->port_no].revision,
ATA_ID_FW_REV, sizeof(sata_dev_desc[ap->port_no].revision));
ata_id_c_string(iobuf, (unsigned char *)sata_dev_desc[ap->port_no].vendor,
ATA_ID_PROD, sizeof(sata_dev_desc[ap->port_no].vendor));
ata_id_c_string(iobuf, (unsigned char *)sata_dev_desc[ap->port_no].product,
ATA_ID_SERNO, sizeof(sata_dev_desc[ap->port_no].product));
if ((iop->config & 0x0080) == 0x0080)
sata_dev_desc[ap->port_no].removable = 1;
else
sata_dev_desc[ap->port_no].removable = 0;
sata_dev_desc[ap->port_no].lba = (u32) n_sectors;
debug("lba=0x%x\n", sata_dev_desc[ap->port_no].lba);
#ifdef CONFIG_LBA48
if (iop->command_set_2 & 0x0400)
sata_dev_desc[ap->port_no].lba48 = 1;
else
sata_dev_desc[ap->port_no].lba48 = 0;
#endif
/* assuming HD */
sata_dev_desc[ap->port_no].type = DEV_TYPE_HARDDISK;
sata_dev_desc[ap->port_no].blksz = ATA_SECT_SIZE;
sata_dev_desc[ap->port_no].lun = 0; /* just to fill something in... */
printf("PATA device#%d %s is found on ata port#%d.\n",
ap->port_no%PATA_DEV_NUM_PER_PORT,
sata_dev_desc[ap->port_no].vendor,
ap->port_no/PATA_DEV_NUM_PER_PORT);
}
static void bfin_ata_set_Feature_cmd(struct ata_port *ap, int dev)
{
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
u8 status = 0;
if (!(ap->dev_mask & (1 << dev)))
return;
bfin_dev_select(ap, dev);
write_atapi_register(base, ATA_REG_FEATURE, SETFEATURES_XFER);
write_atapi_register(base, ATA_REG_NSECT, ap->ata_mode);
write_atapi_register(base, ATA_REG_LBAL, 0);
write_atapi_register(base, ATA_REG_LBAM, 0);
write_atapi_register(base, ATA_REG_LBAH, 0);
write_atapi_register(base, ATA_REG_DEVICE, ATA_DEVICE_OBS);
write_atapi_register(base, ATA_REG_CMD, ATA_CMD_SET_FEATURES);
udelay(50);
msleep(150);
status = bfin_ata_busy_wait(ap, ATA_BUSY, 5000, 0);
if ((status & (ATA_BUSY | ATA_ERR))) {
printf("Error : status 0x%02x\n", status);
ap->dev_mask &= ~(1 << dev);
}
}
int scan_sata(int dev)
{
/* dev is the index of each ata device in the system. one PATA port
* contains 2 devices. one element in scan_done array indicates one
* PATA port. device connected to one PATA port is selected by
* bfin_dev_select() before access.
*/
struct ata_port *ap = &port[dev];
static int scan_done[(CONFIG_SYS_SATA_MAX_DEVICE+1)/PATA_DEV_NUM_PER_PORT];
if (scan_done[dev/PATA_DEV_NUM_PER_PORT])
return 0;
/* Check for attached device */
if (!bfin_ata_probe_port(ap)) {
if (bfin_softreset(ap)) {
/* soft reset failed, try a hard one */
bfin_ata_reset_port(ap);
if (bfin_softreset(ap))
scan_done[dev/PATA_DEV_NUM_PER_PORT] = 1;
} else {
scan_done[dev/PATA_DEV_NUM_PER_PORT] = 1;
}
}
if (scan_done[dev/PATA_DEV_NUM_PER_PORT]) {
/* Probe device and set xfer mode */
bfin_ata_identify(ap, dev%PATA_DEV_NUM_PER_PORT);
bfin_ata_set_Feature_cmd(ap, dev%PATA_DEV_NUM_PER_PORT);
init_part(&sata_dev_desc[dev]);
return 0;
}
printf("PATA device#%d is not present on ATA port#%d.\n",
ap->port_no%PATA_DEV_NUM_PER_PORT,
ap->port_no/PATA_DEV_NUM_PER_PORT);
return -1;
}
int init_sata(int dev)
{
struct ata_port *ap = &port[dev];
static u8 init_done;
int res = 1;
if (init_done)
return res;
init_done = 1;
switch (dev/PATA_DEV_NUM_PER_PORT) {
case 0:
ap->ioaddr.ctl_addr = ATAPI_CONTROL;
ap->ata_mode = CONFIG_BFIN_ATA_MODE;
break;
default:
printf("Tried to scan unknown port %d.\n", dev);
return res;
}
if (ap->ata_mode < XFER_PIO_0 || ap->ata_mode > XFER_PIO_4) {
ap->ata_mode = XFER_PIO_4;
printf("DMA mode is not supported. Set to PIO mode 4.\n");
}
ap->port_no = dev;
ap->ctl_reg = 0x8; /*Default value of control reg */
res = 0;
return res;
}
/* Read up to 255 sectors
*
* Returns sectors read
*/
static u8 do_one_read(struct ata_port *ap, u64 blknr, u8 blkcnt, u16 *buffer,
uchar lba48)
{
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
u8 sr = 0;
u8 status;
u16 err = 0;
if (!(bfin_check_status(ap) & ATA_DRDY)) {
printf("Device ata%d not ready\n", ap->port_no);
return 0;
}
/* Set up transfer */
#ifdef CONFIG_LBA48
if (lba48) {
/* write high bits */
write_atapi_register(base, ATA_REG_NSECT, 0);
write_atapi_register(base, ATA_REG_LBAL, (blknr >> 24) & 0xFF);
write_atapi_register(base, ATA_REG_LBAM, (blknr >> 32) & 0xFF);
write_atapi_register(base, ATA_REG_LBAH, (blknr >> 40) & 0xFF);
}
#endif
write_atapi_register(base, ATA_REG_NSECT, blkcnt);
write_atapi_register(base, ATA_REG_LBAL, (blknr >> 0) & 0xFF);
write_atapi_register(base, ATA_REG_LBAM, (blknr >> 8) & 0xFF);
write_atapi_register(base, ATA_REG_LBAH, (blknr >> 16) & 0xFF);
#ifdef CONFIG_LBA48
if (lba48) {
write_atapi_register(base, ATA_REG_DEVICE, ATA_LBA);
write_atapi_register(base, ATA_REG_CMD, ATA_CMD_PIO_READ_EXT);
} else
#endif
{
write_atapi_register(base, ATA_REG_DEVICE, ATA_LBA | ((blknr >> 24) & 0xF));
write_atapi_register(base, ATA_REG_CMD, ATA_CMD_PIO_READ);
}
status = bfin_ata_busy_wait(ap, ATA_BUSY, 500000, 1);
if (status & (ATA_BUSY | ATA_ERR)) {
printf("Device %d not responding status 0x%x.\n", ap->port_no, status);
err = read_atapi_register(base, ATA_REG_ERR);
printf("Error reg = 0x%x\n", err);
return sr;
}
while (blkcnt--) {
if (bfin_wait_for_irq(ap, 500)) {
printf("ata%u irq failed\n", ap->port_no);
return sr;
}
status = bfin_check_status(ap);
if (status & ATA_ERR) {
err = read_atapi_register(base, ATA_REG_ERR);
printf("ata%u error %d\n", ap->port_no, err);
return sr;
}
bfin_irq_clear(ap);
/* Read one sector */
read_atapi_data(base, ATA_SECTOR_WORDS, buffer);
buffer += ATA_SECTOR_WORDS;
sr++;
}
return sr;
}
ulong sata_read(int dev, ulong block, ulong blkcnt, void *buff)
{
struct ata_port *ap = &port[dev];
ulong n = 0, sread;
u16 *buffer = (u16 *) buff;
u8 status = 0;
u64 blknr = (u64) block;
unsigned char lba48 = 0;
#ifdef CONFIG_LBA48
if (blknr > 0xfffffff) {
if (!sata_dev_desc[dev].lba48) {
printf("Drive doesn't support 48-bit addressing\n");
return 0;
}
/* more than 28 bits used, use 48bit mode */
lba48 = 1;
}
#endif
bfin_dev_select(ap, dev%PATA_DEV_NUM_PER_PORT);
while (blkcnt > 0) {
if (blkcnt > 255)
sread = 255;
else
sread = blkcnt;
status = do_one_read(ap, blknr, sread, buffer, lba48);
if (status != sread) {
printf("Read failed\n");
return n;
}
blkcnt -= sread;
blknr += sread;
n += sread;
buffer += sread * ATA_SECTOR_WORDS;
}
return n;
}
ulong sata_write(int dev, ulong block, ulong blkcnt, const void *buff)
{
struct ata_port *ap = &port[dev];
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
ulong n = 0;
u16 *buffer = (u16 *) buff;
unsigned char status = 0;
u64 blknr = (u64) block;
#ifdef CONFIG_LBA48
unsigned char lba48 = 0;
if (blknr > 0xfffffff) {
if (!sata_dev_desc[dev].lba48) {
printf("Drive doesn't support 48-bit addressing\n");
return 0;
}
/* more than 28 bits used, use 48bit mode */
lba48 = 1;
}
#endif
bfin_dev_select(ap, dev%PATA_DEV_NUM_PER_PORT);
while (blkcnt-- > 0) {
status = bfin_ata_busy_wait(ap, ATA_BUSY, 50000, 0);
if (status & ATA_BUSY) {
printf("ata%u failed to respond\n", ap->port_no);
return n;
}
#ifdef CONFIG_LBA48
if (lba48) {
/* write high bits */
write_atapi_register(base, ATA_REG_NSECT, 0);
write_atapi_register(base, ATA_REG_LBAL,
(blknr >> 24) & 0xFF);
write_atapi_register(base, ATA_REG_LBAM,
(blknr >> 32) & 0xFF);
write_atapi_register(base, ATA_REG_LBAH,
(blknr >> 40) & 0xFF);
}
#endif
write_atapi_register(base, ATA_REG_NSECT, 1);
write_atapi_register(base, ATA_REG_LBAL, (blknr >> 0) & 0xFF);
write_atapi_register(base, ATA_REG_LBAM, (blknr >> 8) & 0xFF);
write_atapi_register(base, ATA_REG_LBAH, (blknr >> 16) & 0xFF);
#ifdef CONFIG_LBA48
if (lba48) {
write_atapi_register(base, ATA_REG_DEVICE, ATA_LBA);
write_atapi_register(base, ATA_REG_CMD,
ATA_CMD_PIO_WRITE_EXT);
} else
#endif
{
write_atapi_register(base, ATA_REG_DEVICE,
ATA_LBA | ((blknr >> 24) & 0xF));
write_atapi_register(base, ATA_REG_CMD,
ATA_CMD_PIO_WRITE);
}
/*may take up to 5 sec */
status = bfin_ata_busy_wait(ap, ATA_BUSY, 50000, 0);
if ((status & (ATA_DRQ | ATA_BUSY | ATA_ERR)) != ATA_DRQ) {
printf("Error no DRQ dev %d blk %ld: sts 0x%02x\n",
ap->port_no, (ulong) blknr, status);
return n;
}
write_atapi_data(base, ATA_SECTOR_WORDS, buffer);
bfin_check_altstatus(ap);
udelay(1);
++n;
++blknr;
buffer += ATA_SECTOR_WORDS;
}
return n;
}
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