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mv_i2c: use structure to replace the direclty define

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Add i2c_clk_enable in the cpu specific code, since previous platform it,
while new platform don't need. In the pantheon and armada100 platform,
this function is defined as NULL one.

Acked-by: Heiko Schocher <hs@denx.de>
Acked-by: Prafulla Wadaskar <prafulla@marvell.com>
Signed-off-by: Lei Wen <leiwen@marvell.com>
master
Lei Wen 14 years ago committed by Albert ARIBAUD
parent 879de1275a
commit 3df619ec2c
7 changed files with 164 additions and 137 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 10
      arch/arm/cpu/pxa/cpu.c
  2. 56
      arch/arm/include/asm/arch-pxa/pxa-regs.h
  3. 9
      board/innokom/innokom.c
  4. 141
      drivers/i2c/mv_i2c.c
  5. 83
      drivers/i2c/mv_i2c.h
  6. 1
      include/configs/innokom.h
  7. 1
      include/configs/xm250.h

10
arch/arm/cpu/pxa/cpu.c
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@ -318,3 +318,13 @@ int arch_cpu_init(void)
pxa_clock_setup();
return 0;
}
void i2c_clk_enable(void)
{
/* set the global I2C clock on */
#ifdef CONFIG_CPU_MONAHANS
writel(readl(CKENB) | (CKENB_4_I2C), CKENB);
#else
writel(readl(CKEN) | CKEN14_I2C, CKEN);
#endif
}

56
arch/arm/include/asm/arch-pxa/pxa-regs.h
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@ -456,62 +456,6 @@ typedef void (*ExcpHndlr) (void) ;
IrSR_XMITIR_IR_MODE)
/*
* I2C registers
*/
#define IBMR 0x40301680 /* I2C Bus Monitor Register - IBMR */
#define IDBR 0x40301688 /* I2C Data Buffer Register - IDBR */
#define ICR 0x40301690 /* I2C Control Register - ICR */
#define ISR 0x40301698 /* I2C Status Register - ISR */
#define ISAR 0x403016A0 /* I2C Slave Address Register - ISAR */
#ifdef CONFIG_CPU_MONAHANS
#define PWRIBMR 0x40f500C0 /* Power I2C Bus Monitor Register-IBMR */
#define PWRIDBR 0x40f500C4 /* Power I2C Data Buffer Register-IDBR */
#define PWRICR 0x40f500C8 /* Power I2C Control Register - ICR */
#define PWRISR 0x40f500CC /* Power I2C Status Register - ISR */
#define PWRISAR 0x40f500D0 /* Power I2C Slave Address Register-ISAR */
#else
#define PWRIBMR 0x40f00180 /* Power I2C Bus Monitor Register-IBMR */
#define PWRIDBR 0x40f00188 /* Power I2C Data Buffer Register-IDBR */
#define PWRICR 0x40f00190 /* Power I2C Control Register - ICR */
#define PWRISR 0x40f00198 /* Power I2C Status Register - ISR */
#define PWRISAR 0x40f001A0 /* Power I2C Slave Address Register-ISAR */
#endif
/* ----- Control register bits ---------------------------------------- */
#define ICR_START 0x1 /* start bit */
#define ICR_STOP 0x2 /* stop bit */
#define ICR_ACKNAK 0x4 /* send ACK(0) or NAK(1) */
#define ICR_TB 0x8 /* transfer byte bit */
#define ICR_MA 0x10 /* master abort */
#define ICR_SCLE 0x20 /* master clock enable, mona SCLEA */
#define ICR_IUE 0x40 /* unit enable */
#define ICR_GCD 0x80 /* general call disable */
#define ICR_ITEIE 0x100 /* enable tx interrupts */
#define ICR_IRFIE 0x200 /* enable rx interrupts, mona: DRFIE */
#define ICR_BEIE 0x400 /* enable bus error ints */
#define ICR_SSDIE 0x800 /* slave STOP detected int enable */
#define ICR_ALDIE 0x1000 /* enable arbitration interrupt */
#define ICR_SADIE 0x2000 /* slave address detected int enable */
#define ICR_UR 0x4000 /* unit reset */
#define ICR_FM 0x8000 /* Fast Mode */
/* ----- Status register bits ----------------------------------------- */
#define ISR_RWM 0x1 /* read/write mode */
#define ISR_ACKNAK 0x2 /* ack/nak status */
#define ISR_UB 0x4 /* unit busy */
#define ISR_IBB 0x8 /* bus busy */
#define ISR_SSD 0x10 /* slave stop detected */
#define ISR_ALD 0x20 /* arbitration loss detected */
#define ISR_ITE 0x40 /* tx buffer empty */
#define ISR_IRF 0x80 /* rx buffer full */
#define ISR_GCAD 0x100 /* general call address detected */
#define ISR_SAD 0x200 /* slave address detected */
#define ISR_BED 0x400 /* bus error no ACK/NAK */
/*
* Serial Audio Controller
*/
/* FIXME the audio defines collide w/ the SA1111 defines. I don't like these

9
board/innokom/innokom.c
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@ -45,12 +45,7 @@ DECLARE_GLOBAL_DATA_PTR;
*/
int i2c_init_board(void)
{
int i, icr;
/* disable I2C controller first, otherwhise it thinks we want to */
/* talk to the slave port... */
icr = readl(ICR);
writel(readl(ICR) & ~(ICR_SCLE | ICR_IUE), ICR);
int i;
/* set gpio pin low _before_ we change direction to output */
writel(GPIO_bit(70), GPCR(70));
@ -63,8 +58,6 @@ int i2c_init_board(void)
udelay(10);
}
writel(icr, ICR);
return 0;
}

141
drivers/i2c/mv_i2c.c
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@ -8,6 +8,9 @@
* (C) Copyright 2003 Pengutronix e.K.
* Robert Schwebel <r.schwebel@pengutronix.de>
*
* (C) Copyright 2011 Marvell Inc.
* Lei Wen <leiwen@marvell.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
@ -34,24 +37,8 @@
#include <asm/io.h>
#ifdef CONFIG_HARD_I2C
/*
* - CONFIG_SYS_I2C_SPEED
* - I2C_PXA_SLAVE_ADDR
*/
#include <asm/arch/hardware.h>
#include <asm/arch/pxa-regs.h>
#include <i2c.h>
#if (CONFIG_SYS_I2C_SPEED == 400000)
#define I2C_ICR_INIT (ICR_FM | ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD \
| ICR_SCLE)
#else
#define I2C_ICR_INIT (ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD | ICR_SCLE)
#endif
#define I2C_ISR_INIT 0x7FF
#include "mv_i2c.h"
#ifdef DEBUG_I2C
#define PRINTD(x) printf x
@ -59,20 +46,6 @@
#define PRINTD(x)
#endif
/* Shall the current transfer have a start/stop condition? */
#define I2C_COND_NORMAL 0
#define I2C_COND_START 1
#define I2C_COND_STOP 2
/* Shall the current transfer be ack/nacked or being waited for it? */
#define I2C_ACKNAK_WAITACK 1
#define I2C_ACKNAK_SENDACK 2
#define I2C_ACKNAK_SENDNAK 4
/* Specify who shall transfer the data (master or slave) */
#define I2C_READ 0
#define I2C_WRITE 1
/* All transfers are described by this data structure */
struct i2c_msg {
u8 condition;
@ -81,27 +54,37 @@ struct i2c_msg {
u8 data;
};
struct mv_i2c {
u32 ibmr;
u32 pad0;
u32 idbr;
u32 pad1;
u32 icr;
u32 pad2;
u32 isr;
u32 pad3;
u32 isar;
};
static struct mv_i2c *base = (struct mv_i2c *)CONFIG_MV_I2C_REG;
/*
* i2c_pxa_reset: - reset the host controller
* i2c_reset: - reset the host controller
*
*/
static void i2c_reset(void)
{
writel(readl(ICR) & ~ICR_IUE, ICR); /* disable unit */
writel(readl(ICR) | ICR_UR, ICR); /* reset the unit */
writel(readl(&base->icr) & ~ICR_IUE, &base->icr); /* disable unit */
writel(readl(&base->icr) | ICR_UR, &base->icr); /* reset the unit */
udelay(100);
writel(readl(ICR) & ~ICR_IUE, ICR); /* disable unit */
#ifdef CONFIG_CPU_MONAHANS
/* | CKENB_1_PWM1 | CKENB_0_PWM0); */
writel(readl(CKENB) | (CKENB_4_I2C), CKENB);
#else /* CONFIG_CPU_MONAHANS */
/* set the global I2C clock on */
writel(readl(CKEN) | CKEN14_I2C, CKEN);
#endif
writel(I2C_PXA_SLAVE_ADDR, ISAR); /* set our slave address */
writel(I2C_ICR_INIT, ICR); /* set control reg values */
writel(I2C_ISR_INIT, ISR); /* set clear interrupt bits */
writel(readl(ICR) | ICR_IUE, ICR); /* enable unit */
writel(readl(&base->icr) & ~ICR_IUE, &base->icr); /* disable unit */
i2c_clk_enable();
writel(CONFIG_SYS_I2C_SLAVE, &base->isar); /* set our slave address */
writel(I2C_ICR_INIT, &base->icr); /* set control reg values */
writel(I2C_ISR_INIT, &base->isr); /* set clear interrupt bits */
writel(readl(&base->icr) | ICR_IUE, &base->icr); /* enable unit */
udelay(100);
}
@ -114,13 +97,15 @@ static void i2c_reset(void)
static int i2c_isr_set_cleared(unsigned long set_mask,
unsigned long cleared_mask)
{
int timeout = 1000;
int timeout = 1000, isr;
while (((ISR & set_mask) != set_mask) || ((ISR & cleared_mask) != 0)) {
do {
isr = readl(&base->isr);
udelay(10);
if (timeout-- < 0)
return 0;
}
} while (((isr & set_mask) != set_mask)
|| ((isr & cleared_mask) != 0));
return 1;
}
@ -153,26 +138,26 @@ int i2c_transfer(struct i2c_msg *msg)
goto transfer_error_bus_busy;
/* start transmission */
writel(readl(ICR) & ~ICR_START, ICR);
writel(readl(ICR) & ~ICR_STOP, ICR);
writel(msg->data, IDBR);
writel(readl(&base->icr) & ~ICR_START, &base->icr);
writel(readl(&base->icr) & ~ICR_STOP, &base->icr);
writel(msg->data, &base->idbr);
if (msg->condition == I2C_COND_START)
writel(readl(ICR) | ICR_START, ICR);
writel(readl(&base->icr) | ICR_START, &base->icr);
if (msg->condition == I2C_COND_STOP)
writel(readl(ICR) | ICR_STOP, ICR);
writel(readl(&base->icr) | ICR_STOP, &base->icr);
if (msg->acknack == I2C_ACKNAK_SENDNAK)
writel(readl(ICR) | ICR_ACKNAK, ICR);
writel(readl(&base->icr) | ICR_ACKNAK, &base->icr);
if (msg->acknack == I2C_ACKNAK_SENDACK)
writel(readl(ICR) & ~ICR_ACKNAK, ICR);
writel(readl(ICR) & ~ICR_ALDIE, ICR);
writel(readl(ICR) | ICR_TB, ICR);
writel(readl(&base->icr) & ~ICR_ACKNAK, &base->icr);
writel(readl(&base->icr) & ~ICR_ALDIE, &base->icr);
writel(readl(&base->icr) | ICR_TB, &base->icr);
/* transmit register empty? */
if (!i2c_isr_set_cleared(ISR_ITE, 0))
goto transfer_error_transmit_timeout;
/* clear 'transmit empty' state */
writel(readl(ISR) | ISR_ITE, ISR);
writel(readl(&base->isr) | ISR_ITE, &base->isr);
/* wait for ACK from slave */
if (msg->acknack == I2C_ACKNAK_WAITACK)
@ -187,28 +172,27 @@ int i2c_transfer(struct i2c_msg *msg)
goto transfer_error_bus_busy;
/* start receive */
writel(readl(ICR) & ~ICR_START, ICR);
writel(readl(ICR) & ~ICR_STOP, ICR);
writel(readl(&base->icr) & ~ICR_START, &base->icr);
writel(readl(&base->icr) & ~ICR_STOP, &base->icr);
if (msg->condition == I2C_COND_START)
writel(readl(ICR) | ICR_START, ICR);
writel(readl(&base->icr) | ICR_START, &base->icr);
if (msg->condition == I2C_COND_STOP)
writel(readl(ICR) | ICR_STOP, ICR);
writel(readl(&base->icr) | ICR_STOP, &base->icr);
if (msg->acknack == I2C_ACKNAK_SENDNAK)
writel(readl(ICR) | ICR_ACKNAK, ICR);
writel(readl(&base->icr) | ICR_ACKNAK, &base->icr);
if (msg->acknack == I2C_ACKNAK_SENDACK)
writel(readl(ICR) & ~ICR_ACKNAK, ICR);
writel(readl(ICR) & ~ICR_ALDIE, ICR);
writel(readl(ICR) | ICR_TB, ICR);
writel(readl(&base->icr) & ~ICR_ACKNAK, &base->icr);
writel(readl(&base->icr) & ~ICR_ALDIE, &base->icr);
writel(readl(&base->icr) | ICR_TB, &base->icr);
/* receive register full? */
if (!i2c_isr_set_cleared(ISR_IRF, 0))
goto transfer_error_receive_timeout;
msg->data = readl(IDBR);
msg->data = readl(&base->idbr);
/* clear 'receive empty' state */
writel(readl(ISR) | ISR_IRF, ISR);
writel(readl(&base->isr) | ISR_IRF, &base->isr);
break;
default:
goto transfer_error_illegal_param;
@ -252,10 +236,21 @@ i2c_transfer_finish:
void i2c_init(int speed, int slaveaddr)
{
#ifdef CONFIG_SYS_I2C_INIT_BOARD
/* call board specific i2c bus reset routine before accessing the */
/* environment, which might be in a chip on that bus. For details */
/* about this problem see doc/I2C_Edge_Conditions. */
u32 icr;
/*
* call board specific i2c bus reset routine before accessing the
* environment, which might be in a chip on that bus. For details
* about this problem see doc/I2C_Edge_Conditions.
*
* disable I2C controller first, otherwhise it thinks we want to
* talk to the slave port...
*/
icr = readl(&base->icr);
writel(readl(&base->icr) & ~(ICR_SCLE | ICR_IUE), &base->icr);
i2c_init_board();
writel(icr, &base->icr);
#endif
}

83
drivers/i2c/mv_i2c.h
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@ -0,0 +1,83 @@
/*
* (C) Copyright 2011
* Marvell Inc, <www.marvell.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
*/
#ifndef _MV_I2C_H_
#define _MV_I2C_H_
extern void i2c_clk_enable(void);
/* Shall the current transfer have a start/stop condition? */
#define I2C_COND_NORMAL 0
#define I2C_COND_START 1
#define I2C_COND_STOP 2
/* Shall the current transfer be ack/nacked or being waited for it? */
#define I2C_ACKNAK_WAITACK 1
#define I2C_ACKNAK_SENDACK 2
#define I2C_ACKNAK_SENDNAK 4
/* Specify who shall transfer the data (master or slave) */
#define I2C_READ 0
#define I2C_WRITE 1
#if (CONFIG_SYS_I2C_SPEED == 400000)
#define I2C_ICR_INIT (ICR_FM | ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD \
| ICR_SCLE)
#else
#define I2C_ICR_INIT (ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD | ICR_SCLE)
#endif
#define I2C_ISR_INIT 0x7FF
/* ----- Control register bits ---------------------------------------- */
#define ICR_START 0x1 /* start bit */
#define ICR_STOP 0x2 /* stop bit */
#define ICR_ACKNAK 0x4 /* send ACK(0) or NAK(1) */
#define ICR_TB 0x8 /* transfer byte bit */
#define ICR_MA 0x10 /* master abort */
#define ICR_SCLE 0x20 /* master clock enable, mona SCLEA */
#define ICR_IUE 0x40 /* unit enable */
#define ICR_GCD 0x80 /* general call disable */
#define ICR_ITEIE 0x100 /* enable tx interrupts */
#define ICR_IRFIE 0x200 /* enable rx interrupts, mona: DRFIE */
#define ICR_BEIE 0x400 /* enable bus error ints */
#define ICR_SSDIE 0x800 /* slave STOP detected int enable */
#define ICR_ALDIE 0x1000 /* enable arbitration interrupt */
#define ICR_SADIE 0x2000 /* slave address detected int enable */
#define ICR_UR 0x4000 /* unit reset */
#define ICR_FM 0x8000 /* Fast Mode */
/* ----- Status register bits ----------------------------------------- */
#define ISR_RWM 0x1 /* read/write mode */
#define ISR_ACKNAK 0x2 /* ack/nak status */
#define ISR_UB 0x4 /* unit busy */
#define ISR_IBB 0x8 /* bus busy */
#define ISR_SSD 0x10 /* slave stop detected */
#define ISR_ALD 0x20 /* arbitration loss detected */
#define ISR_ITE 0x40 /* tx buffer empty */
#define ISR_IRF 0x80 /* rx buffer full */
#define ISR_GCAD 0x100 /* general call address detected */
#define ISR_SAD 0x200 /* slave address detected */
#define ISR_BED 0x400 /* bus error no ACK/NAK */
#endif

1
include/configs/innokom.h
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@ -141,6 +141,7 @@
* I2C bus
*/
#define CONFIG_I2C_MV 1
#define CONFIG_MV_I2C_REG 0x40301680
#define CONFIG_HARD_I2C 1
#define CONFIG_SYS_I2C_SPEED 50000
#define CONFIG_SYS_I2C_SLAVE 0xfe

1
include/configs/xm250.h
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@ -62,6 +62,7 @@
* I2C bus
*/
#define CONFIG_I2C_MV 1
#define CONFIG_MV_I2C_REG 0x40301680
#define CONFIG_HARD_I2C 1
#define CONFIG_SYS_I2C_SPEED 50000
#define CONFIG_SYS_I2C_SLAVE 0xfe

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