u-boot/drivers/block/ftide020.c

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/*
* Faraday FTIDE020 ATA Controller (AHB)
*
* (C) Copyright 2011 Andes Technology
* Greentime Hu <greentime@andestech.com>
* Macpaul Lin <macpaul@andestech.com>
* Kuo-Wei Chou <kwchou@andestech.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*/
/* ftide020.c - ide support functions for the FTIDE020_S controller */
#include <config.h>
#include <common.h>
#include <ata.h>
#include <ide.h>
#include <asm/io.h>
#include <api_public.h>
#include "ftide020.h"
/* base address */
#define FTIDE_BASE CONFIG_SYS_ATA_BASE_ADDR
/*
* data address - The CMD and DATA use the same FIFO in FTIDE020_S
* FTIDE_DATA = CONFIG_SYS_ATA_BASE_ADDR + CONFIG_SYS_ATA_DATA_OFFSET
* = &ftide020->rw_fifo
*/
#define FTIDE_DATA (&ftide020->rw_fifo)
/* command and data I/O macros */
/* 0x0 - DATA FIFO */
#define WRITE_DATA(x) outl((x), &ftide020->rw_fifo) /* 0x00 */
#define READ_DATA() inl(&ftide020->rw_fifo) /* 0x00 */
/* 0x04 - R: Status Reg, W: CMD_FIFO */
#define WRITE_CMD(x) outl((x), &ftide020->cmd_fifo) /* 0x04 */
#define READ_STATUS() inl(&ftide020->cmd_fifo) /* 0x04 */
void ftide_set_device(int cx8, int dev)
{
static struct ftide020_s *ftide020 = (struct ftide020_s *) FTIDE_BASE;
WRITE_CMD(SET_DEV_CMD | IDE_SET_CX8(cx8) | dev);
}
unsigned char ide_read_register(int dev, unsigned int port)
{
static struct ftide020_s *ftide020 = (struct ftide020_s *) FTIDE_BASE;
ftide_set_device(0, dev);
WRITE_CMD(READ_REG_CMD | IDE_REG_CS_READ(CONFIG_IDE_REG_CS) |
IDE_REG_DA_WRITE(port));
return READ_DATA() & 0xff;
}
void ide_write_register(int dev, unsigned int port, unsigned char val)
{
static struct ftide020_s *ftide020 = (struct ftide020_s *) FTIDE_BASE;
ftide_set_device(0, dev);
WRITE_CMD(WRITE_REG_CMD | IDE_REG_CS_WRITE(CONFIG_IDE_REG_CS) |
IDE_REG_DA_WRITE(port) | val);
}
void ide_write_data(int dev, ulong *sect_buf, int words)
{
static struct ftide020_s *ftide020 = (struct ftide020_s *) FTIDE_BASE;
ftide_set_device(0, dev);
WRITE_CMD(WRITE_DATA_CMD | ((words << 2) - 1));
/* block write */
outsl(FTIDE_DATA, sect_buf, words);
}
void ide_read_data(int dev, ulong *sect_buf, int words)
{
static struct ftide020_s *ftide020 = (struct ftide020_s *) FTIDE_BASE;
ftide_set_device(0, dev);
WRITE_CMD(READ_DATA_CMD | ((words << 2) - 1));
/* block read */
insl(FTIDE_DATA, sect_buf, words);
}
void ftide_dfifo_ready(ulong *time)
{
static struct ftide020_s *ftide020 = (struct ftide020_s *) FTIDE_BASE;
while (!(READ_STATUS() & STATUS_RFE)) {
if (*time-- == 0)
break;
udelay(100);
}
}
extern ulong ide_bus_offset[CONFIG_SYS_IDE_MAXBUS];
/* Reset_IDE_controller */
static void reset_ide_controller(void)
{
static struct ftide020_s *ftide020 = (struct ftide020_s *) FTIDE_BASE;
unsigned int val;
val = inl(&ftide020->cr);
val |= CONTROL_RST;
outl(val, &ftide020->cr);
/* wait until reset OK, this is poor HW design */
mdelay(50);
val &= ~(CONTROL_RST);
outl(val, &ftide020->cr);
mdelay(50);
val |= CONTROL_SRST;
outl(val, &ftide020->cr);
/* wait until reset OK, this is poor HW design */
mdelay(50);
val &= ~(CONTROL_SRST);
outl(val, &ftide020->cr);
/* IORDY enable for PIO, for 2 device */
val |= (CONTROL_IRE0 | CONTROL_IRE1);
outl(val, &ftide020->cr);
}
/* IDE clock frequence */
uint ftide_clock_freq(void)
{
/*
* todo: To aquire dynamic system frequency is dependend on the power
* management unit which the ftide020 is connected to. In current,
* there are only few PMU supports in u-boot.
* So this function is wait for future enhancement.
*/
return 100;
}
/* Calculate Timing Registers */
static unsigned int timing_cal(u16 t0, u16 t1, u16 t2, u16 t4)
{
unsigned int val, ahb_ns = 8;
u8 TEOC, T1, T2, T4;
T1 = (u8) (t1 / ahb_ns);
if ((T1 * ahb_ns) == t1)
T1--;
T2 = (u8) (t2 / ahb_ns);
if ((T2 * ahb_ns) == t2)
T2--;
T4 = (u8) (t4 / ahb_ns);
if ((T4 * ahb_ns) == t4)
T4--;
TEOC = (u8) (t0 / ahb_ns);
if ((TEOC * ahb_ns) == t0)
TEOC--;
TEOC = ((TEOC > (T1 + T2 + T4)) ? (TEOC - (T1 + T2 + T4)) : 0);
/*
* Here the fields in data timing registers in PIO mode
* is accessed the same way as command timing registers.
*/
val = DT_REG_PIO_T1(T1) |
DT_REG_PIO_T2(T2) |
DT_REG_PIO_T4(T4) |
DT_REG_PIO_TEOC(TEOC);
return val;
}
/* Set Timing Register */
static unsigned int set_mode_timing(u8 dev, u8 id, u8 mode)
{
static struct ftide020_s *ftide020 = (struct ftide020_s *) FTIDE_BASE;
u16 t0, t1, t2, t4;
u8 tcyc, tcvs, tmli, tenv, tack, trp;
unsigned int val, sysclk = 8;
if (id >= TATOL_TIMING)
return 0;
sysclk = ftide_clock_freq();
switch (id) {
case CMD_TIMING:
if (mode < REG_MODE) {
t0 = REG_ACCESS_TIMING[REG_T0][mode];
t1 = REG_ACCESS_TIMING[REG_T1][mode];
t2 = REG_ACCESS_TIMING[REG_T2][mode];
t4 = REG_ACCESS_TIMING[REG_T4][mode];
val = timing_cal(t0, t1, t2, t4);
outl(val, (dev ? &ftide020->ctrd1 : &ftide020->ctrd0));
return 1;
} else
return 0;
case PIO_TIMING:
if (mode < PIO_MODE) {
t0 = PIO_ACCESS_TIMING[PIO_T0][mode];
t1 = PIO_ACCESS_TIMING[PIO_T1][mode];
t2 = PIO_ACCESS_TIMING[PIO_T2][mode];
t4 = PIO_ACCESS_TIMING[PIO_T4][mode];
val = timing_cal(t0, t1, t2, t4);
outl(val, (dev ? &ftide020->dtrd1 : &ftide020->dtrd0));
return 1;
} else
return 0;
case DMA_TIMING:
if (mode < UDMA_MODE) {
/*
* 0.999 is ceiling
* for tcyc, tcvs, tmli, tenv, trp, tack
*/
tcyc = (u8) (((UDMA_ACCESS_TIMING[UDMA_TCYC][mode] \
* sysclk) + 9990) / 10000);
tcvs = (u8) (((UDMA_ACCESS_TIMING[UDMA_TCVS][mode] \
* sysclk) + 9990) / 10000);
tmli = (u8) (((UDMA_ACCESS_TIMING[UDMA_TMLI][mode] \
* sysclk) + 9990) / 10000);
tenv = (u8) (((UDMA_ACCESS_TIMING[UDMA_TENV][mode] \
* sysclk) + 9990) / 10000);
trp = (u8) (((UDMA_ACCESS_TIMING[UDMA_TRP][mode] \
* sysclk) + 9990) / 10000);
tack = (u8) (((UDMA_ACCESS_TIMING[UDMA_TACK][mode] \
* sysclk) + 9990) / 10000);
val = DT_REG_UDMA_TENV((tenv > 0) ? (tenv - 1) : 0) |
DT_REG_UDMA_TMLI((tmli > 0) ? (tmli - 1) : 0) |
DT_REG_UDMA_TCYC((tcyc > 0) ? (tcyc - 1) : 0) |
DT_REG_UDMA_TACK((tack > 0) ? (tack - 1) : 0) |
DT_REG_UDMA_TCVS((tcvs > 0) ? (tcvs - 1) : 0) |
DT_REG_UDMA_TRP((trp > 0) ? (trp - 1) : 0);
outl(val, (dev ? &ftide020->dtrd1 : &ftide020->dtrd0));
return 1;
} else
return 0;
default:
return 0;
}
}
static void ftide_read_hwrev(void)
{
static struct ftide020_s *ftide020 = (struct ftide020_s *) FTIDE_BASE;
unsigned int rev;
rev = inl(&ftide020->revision);
}
static int ftide_controller_probe(void)
{
static struct ftide020_s *ftide020 = (struct ftide020_s *) FTIDE_BASE;
unsigned int bak;
bak = inl(&ftide020->ctrd1);
/* probing by using shorter setup time */
outl(CONFIG_CTRD1_PROBE_T1, &ftide020->ctrd1);
if ((inl(&ftide020->ctrd1) & 0xff) != CONFIG_CTRD1_PROBE_T1) {
outl(bak, &ftide020->ctrd1);
return 0;
}
/* probing by using longer setup time */
outl(CONFIG_CTRD1_PROBE_T2, &ftide020->ctrd1);
if ((inl(&ftide020->ctrd1) & 0xff) != CONFIG_CTRD1_PROBE_T2) {
outl(bak, &ftide020->ctrd1);
return 0;
}
outl(bak, &ftide020->ctrd1);
return 1;
}
/* ide_preinit() was migrated from linux driver ide_probe_for_ftide() */
int ide_preinit(void)
{
static struct ftide020_s *ftide020 = (struct ftide020_s *) FTIDE_BASE;
int status;
unsigned int val;
int i;
status = 1;
for (i = 0; i < CONFIG_SYS_IDE_MAXBUS; i++)
ide_bus_offset[i] = -ATA_STATUS;
/* auto-detect IDE controller */
if (ftide_controller_probe()) {
printf("FTIDE020_S\n");
} else {
printf("FTIDE020_S ATA controller not found.\n");
return API_ENODEV;
}
/* check HW IP revision */
ftide_read_hwrev();
/* set FIFO threshold */
outl(((WRITE_FIFO - RX_THRESH) << 16) | RX_THRESH, &ftide020->dmatirr);
/* set Device_0 PIO_4 timing */
set_mode_timing(0, CMD_TIMING, REG_MODE4);
set_mode_timing(0, PIO_TIMING, PIO_MODE4);
/* set Device_1 PIO_4 timing */
set_mode_timing(1, CMD_TIMING, REG_MODE4);
set_mode_timing(1, PIO_TIMING, PIO_MODE4);
/* from E-bios */
/* little endian */
outl(0x0, &ftide020->cr);
mdelay(10);
outl(0x0fff0fff, &ftide020->ahbtr);
mdelay(10);
/* Enable controller Interrupt */
val = inl(&ftide020->cr);
/* Enable: IDE IRQ, IDE Terminate ERROR IRQ, AHB Timeout error IRQ */
val |= (CONTROL_IIE | CONTROL_TERIE | CONTROL_AERIE);
outl(val, &ftide020->cr);
status = 0;
return status;
}
void ide_set_reset(int flag)
{
debug("ide_set_reset()\n");
reset_ide_controller();
return;
}