diff options
| -rw-r--r-- | arch/arm/mach-mxs/Makefile | 4 | ||||
| -rw-r--r-- | arch/arm/mach-mxs/include/mach/common.h | 1 | ||||
| -rw-r--r-- | arch/arm/mach-mxs/mach-mxs.c | 76 | ||||
| -rw-r--r-- | arch/arm/mach-mxs/ocotp.c | 100 |
4 files changed, 76 insertions, 105 deletions
diff --git a/arch/arm/mach-mxs/Makefile b/arch/arm/mach-mxs/Makefile index 2568d24358e..80db7269760 100644 --- a/arch/arm/mach-mxs/Makefile +++ b/arch/arm/mach-mxs/Makefile @@ -1,6 +1,2 @@ -# Common support -obj-y := ocotp.o - obj-$(CONFIG_PM) += pm.o - obj-$(CONFIG_MACH_MXS_DT) += mach-mxs.o diff --git a/arch/arm/mach-mxs/include/mach/common.h b/arch/arm/mach-mxs/include/mach/common.h index 79cb572c092..aca982c6d43 100644 --- a/arch/arm/mach-mxs/include/mach/common.h +++ b/arch/arm/mach-mxs/include/mach/common.h @@ -11,7 +11,6 @@ #ifndef __MACH_MXS_COMMON_H__ #define __MACH_MXS_COMMON_H__ -extern const u32 *mxs_get_ocotp(void); extern int mxs_saif_clkmux_select(unsigned int clkmux); extern int mx23_clocks_init(void); diff --git a/arch/arm/mach-mxs/mach-mxs.c b/arch/arm/mach-mxs/mach-mxs.c index 069049200eb..f346c432cda 100644 --- a/arch/arm/mach-mxs/mach-mxs.c +++ b/arch/arm/mach-mxs/mach-mxs.c @@ -183,6 +183,82 @@ static void __init imx28_timer_init(void) clocksource_of_init(); } +#define OCOTP_WORD_OFFSET 0x20 +#define OCOTP_WORD_COUNT 0x20 + +#define BM_OCOTP_CTRL_BUSY (1 << 8) +#define BM_OCOTP_CTRL_ERROR (1 << 9) +#define BM_OCOTP_CTRL_RD_BANK_OPEN (1 << 12) + +static DEFINE_MUTEX(ocotp_mutex); +static u32 ocotp_words[OCOTP_WORD_COUNT]; + +static const u32 *mxs_get_ocotp(void) +{ + struct device_node *np; + void __iomem *ocotp_base; + int timeout = 0x400; + size_t i; + static int once; + + if (once) + return ocotp_words; + + np = of_find_compatible_node(NULL, NULL, "fsl,ocotp"); + ocotp_base = of_iomap(np, 0); + WARN_ON(!ocotp_base); + + mutex_lock(&ocotp_mutex); + + /* + * clk_enable(hbus_clk) for ocotp can be skipped + * as it must be on when system is running. + */ + + /* try to clear ERROR bit */ + __mxs_clrl(BM_OCOTP_CTRL_ERROR, ocotp_base); + + /* check both BUSY and ERROR cleared */ + while ((__raw_readl(ocotp_base) & + (BM_OCOTP_CTRL_BUSY | BM_OCOTP_CTRL_ERROR)) && --timeout) + cpu_relax(); + + if (unlikely(!timeout)) + goto error_unlock; + + /* open OCOTP banks for read */ + __mxs_setl(BM_OCOTP_CTRL_RD_BANK_OPEN, ocotp_base); + + /* approximately wait 32 hclk cycles */ + udelay(1); + + /* poll BUSY bit becoming cleared */ + timeout = 0x400; + while ((__raw_readl(ocotp_base) & BM_OCOTP_CTRL_BUSY) && --timeout) + cpu_relax(); + + if (unlikely(!timeout)) + goto error_unlock; + + for (i = 0; i < OCOTP_WORD_COUNT; i++) + ocotp_words[i] = __raw_readl(ocotp_base + OCOTP_WORD_OFFSET + + i * 0x10); + + /* close banks for power saving */ + __mxs_clrl(BM_OCOTP_CTRL_RD_BANK_OPEN, ocotp_base); + + once = 1; + + mutex_unlock(&ocotp_mutex); + + return ocotp_words; + +error_unlock: + mutex_unlock(&ocotp_mutex); + pr_err("%s: timeout in reading OCOTP\n", __func__); + return NULL; +} + enum mac_oui { OUI_FSL, OUI_DENX, diff --git a/arch/arm/mach-mxs/ocotp.c b/arch/arm/mach-mxs/ocotp.c deleted file mode 100644 index c2002eb2655..00000000000 --- a/arch/arm/mach-mxs/ocotp.c +++ /dev/null @@ -1,100 +0,0 @@ -/* - * Copyright 2010 Freescale Semiconductor, Inc. All Rights Reserved. - * - * 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. - */ - -#include <linux/delay.h> -#include <linux/err.h> -#include <linux/mutex.h> -#include <linux/of.h> -#include <linux/of_address.h> - -#include <asm/processor.h> /* for cpu_relax() */ - -#include <mach/mxs.h> -#include <mach/common.h> - -#define OCOTP_WORD_OFFSET 0x20 -#define OCOTP_WORD_COUNT 0x20 - -#define BM_OCOTP_CTRL_BUSY (1 << 8) -#define BM_OCOTP_CTRL_ERROR (1 << 9) -#define BM_OCOTP_CTRL_RD_BANK_OPEN (1 << 12) - -static DEFINE_MUTEX(ocotp_mutex); -static u32 ocotp_words[OCOTP_WORD_COUNT]; - -const u32 *mxs_get_ocotp(void) -{ - struct device_node *np; - void __iomem *ocotp_base; - int timeout = 0x400; - size_t i; - static int once = 0; - - if (once) - return ocotp_words; - - np = of_find_compatible_node(NULL, NULL, "fsl,ocotp"); - ocotp_base = of_iomap(np, 0); - WARN_ON(!ocotp_base); - - mutex_lock(&ocotp_mutex); - - /* - * clk_enable(hbus_clk) for ocotp can be skipped - * as it must be on when system is running. - */ - - /* try to clear ERROR bit */ - __mxs_clrl(BM_OCOTP_CTRL_ERROR, ocotp_base); - - /* check both BUSY and ERROR cleared */ - while ((__raw_readl(ocotp_base) & - (BM_OCOTP_CTRL_BUSY | BM_OCOTP_CTRL_ERROR)) && --timeout) - cpu_relax(); - - if (unlikely(!timeout)) - goto error_unlock; - - /* open OCOTP banks for read */ - __mxs_setl(BM_OCOTP_CTRL_RD_BANK_OPEN, ocotp_base); - - /* approximately wait 32 hclk cycles */ - udelay(1); - - /* poll BUSY bit becoming cleared */ - timeout = 0x400; - while ((__raw_readl(ocotp_base) & BM_OCOTP_CTRL_BUSY) && --timeout) - cpu_relax(); - - if (unlikely(!timeout)) - goto error_unlock; - - for (i = 0; i < OCOTP_WORD_COUNT; i++) - ocotp_words[i] = __raw_readl(ocotp_base + OCOTP_WORD_OFFSET + - i * 0x10); - - /* close banks for power saving */ - __mxs_clrl(BM_OCOTP_CTRL_RD_BANK_OPEN, ocotp_base); - - once = 1; - - mutex_unlock(&ocotp_mutex); - - return ocotp_words; - -error_unlock: - mutex_unlock(&ocotp_mutex); - pr_err("%s: timeout in reading OCOTP\n", __func__); - return NULL; -} |