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snowball: applying power to LAN and GBF controllers

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LAN and GBF need to be powered explicitely, doing so with
interface to AB8500 companion chip.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: John Rigby <john.rigby@linaro.org>
This commit is contained in:
Mathieu J. Poirier 2012-07-31 08:59:28 +00:00 committed by Albert ARIBAUD
parent 101a769d75
commit b95f9ec7d8
4 changed files with 103 additions and 3 deletions
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11
arch/arm/include/asm/arch-u8500/hardware.h
View File

@ -62,7 +62,7 @@
/* Per4 */
#define U8500_PRCMU_BASE (U8500_PER4_BASE + 0x07000)
#define U8500_PRCMU_TCDM_BASE (U8500_PER4_BASE + 0x06800)
#define U8500_PRCMU_TCDM_BASE (U8500_PER4_BASE + 0x68000)
/* Per3 */
#define U8500_UART2_BASE (U8500_PER3_BASE + 0x7000)
@ -80,4 +80,13 @@
#define U8500_BOOTROM_BASE 0x9001f000
#define U8500_BOOTROM_ASIC_ID_OFFSET 0x0ff4
/* AB8500 specifics */
#define AB8500_MISC 0x0010
#define AB8500_GPIO_SEL2_REG 0x1001
#define AB8500_GPIO_DIR2_REG 0x1011
#define AB8500_GPIO_DIR4_REG 0x1013
#define AB8500_GPIO_SEL4_REG 0x1003
#define AB8500_GPIO_OUT2_REG 0x1021
#define AB8500_GPIO_OUT4_REG 0x1023
#endif /* __ASM_ARCH_HARDWARE_H */

7
arch/arm/include/asm/arch-u8500/prcmu.h
View File

@ -64,8 +64,11 @@
#define REQ_MB5 5
extern int prcmu_i2c_read(u8 reg, u16 slave);
extern int prcmu_i2c_write(u8 reg, u16 slave, u8 reg_data);
#define ab8500_read prcmu_i2c_read
#define ab8500_write prcmu_i2c_write
int prcmu_i2c_read(u8 reg, u16 slave);
int prcmu_i2c_write(u8 reg, u16 slave, u8 reg_data);
void u8500_prcmu_enable(u32 *reg);
void db8500_prcmu_init(void);

87
board/st-ericsson/snowball/snowball.c
View File

@ -25,6 +25,8 @@
#include <asm/io.h>
#include <asm/errno.h>
#include <asm/arch/db8500_pincfg.h>
#include <asm/arch/prcmu.h>
#include <asm/arch/hardware.h>
#include "db8500_pins.h"
@ -164,3 +166,88 @@ int dram_init(void)
return 0;
}
static int raise_ab8500_gpio16(void)
{
int ret;
/* selection */
ret = ab8500_read(AB8500_MISC, AB8500_GPIO_SEL2_REG);
if (ret < 0)
goto out;
ret |= 0x80;
ret = ab8500_write(AB8500_MISC, AB8500_GPIO_SEL2_REG, ret);
if (ret < 0)
goto out;
/* direction */
ret = ab8500_read(AB8500_MISC, AB8500_GPIO_DIR2_REG);
if (ret < 0)
goto out;
ret |= 0x80;
ret = ab8500_write(AB8500_MISC, AB8500_GPIO_DIR2_REG, ret);
if (ret < 0)
goto out;
/* out */
ret = ab8500_read(AB8500_MISC, AB8500_GPIO_OUT2_REG);
if (ret < 0)
goto out;
ret |= 0x80;
ret = ab8500_write(AB8500_MISC, AB8500_GPIO_OUT2_REG, ret);
out:
return ret;
}
static int raise_ab8500_gpio26(void)
{
int ret;
/* selection */
ret = ab8500_read(AB8500_MISC, AB8500_GPIO_DIR4_REG);
if (ret < 0)
goto out;
ret |= 0x2;
ret = ab8500_write(AB8500_MISC, AB8500_GPIO_DIR4_REG, ret);
if (ret < 0)
goto out;
/* out */
ret = ab8500_read(AB8500_MISC, AB8500_GPIO_OUT4_REG);
if (ret < 0)
goto out;
ret |= 0x2;
ret = ab8500_write(AB8500_MISC, AB8500_GPIO_OUT4_REG, ret);
out:
return ret;
}
int board_late_init(void)
{
/* enable 3V3 for LAN controller */
if (raise_ab8500_gpio26() >= 0) {
/* Turn on FSMC device */
writel(0x1, 0x8000f000);
writel(0x1, 0x8000f008);
/* setup FSMC for LAN controler */
writel(0x305b, 0x80000000);
/* run at the highest possible speed */
writel(0x01010210, 0x80000004);
} else
printf("error: can't raise GPIO26\n");
/* enable 3v6 for GBF chip */
if ((raise_ab8500_gpio16() < 0))
printf("error: cant' raise GPIO16\n");
return 0;
}

1
include/configs/snowball.h
View File

@ -32,6 +32,7 @@
#define CONFIG_SYS_ICACHE_OFF
#define CONFIG_SYS_DCACHE_OFF
#define CONFIG_ARCH_CPU_INIT
#define CONFIG_BOARD_LATE_INIT
/*
* High Level Configuration Options