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-rw-r--r--arch/arm/mach-davinci/Makefile2
-rw-r--r--arch/arm/mach-davinci/common.c29
-rw-r--r--arch/arm/mach-davinci/dm355.c14
-rw-r--r--arch/arm/mach-davinci/dm644x.c15
-rw-r--r--arch/arm/mach-davinci/dm646x.c14
-rw-r--r--arch/arm/mach-davinci/id.c116
-rw-r--r--arch/arm/mach-davinci/include/mach/common.h6
-rw-r--r--arch/arm/mach-davinci/include/mach/cputype.h29
8 files changed, 97 insertions, 128 deletions
diff --git a/arch/arm/mach-davinci/Makefile b/arch/arm/mach-davinci/Makefile
index 74d25f69934e..a65d03bb4679 100644
--- a/arch/arm/mach-davinci/Makefile
+++ b/arch/arm/mach-davinci/Makefile
@@ -4,7 +4,7 @@
#
# Common objects
-obj-y := time.o irq.o clock.o serial.o io.o id.o psc.o \
+obj-y := time.o irq.o clock.o serial.o io.o psc.o \
gpio.o devices.o dma.o usb.o common.o
obj-$(CONFIG_DAVINCI_MUX) += mux.o
diff --git a/arch/arm/mach-davinci/common.c b/arch/arm/mach-davinci/common.c
index 9a5486f5519c..29b3a8d51211 100644
--- a/arch/arm/mach-davinci/common.c
+++ b/arch/arm/mach-davinci/common.c
@@ -15,13 +15,31 @@
#include <asm/mach/map.h>
#include <mach/common.h>
+#include <mach/cputype.h>
struct davinci_soc_info davinci_soc_info;
EXPORT_SYMBOL(davinci_soc_info);
+static struct davinci_id * __init davinci_get_id(u32 jtag_id)
+{
+ int i;
+ struct davinci_id *dip;
+ u8 variant = (jtag_id & 0xf0000000) >> 28;
+ u16 part_no = (jtag_id & 0x0ffff000) >> 12;
+
+ for (i = 0, dip = davinci_soc_info.ids; i < davinci_soc_info.ids_num;
+ i++, dip++)
+ /* Don't care about the manufacturer right now */
+ if ((dip->part_no == part_no) && (dip->variant == variant))
+ return dip;
+
+ return NULL;
+}
+
void __init davinci_common_init(struct davinci_soc_info *soc_info)
{
int ret;
+ struct davinci_id *dip;
if (!soc_info) {
ret = -EINVAL;
@@ -46,7 +64,16 @@ void __init davinci_common_init(struct davinci_soc_info *soc_info)
* We want to check CPU revision early for cpu_is_xxxx() macros.
* IO space mapping must be initialized before we can do that.
*/
- davinci_check_revision();
+ davinci_soc_info.jtag_id = __raw_readl(davinci_soc_info.jtag_id_base);
+
+ dip = davinci_get_id(davinci_soc_info.jtag_id);
+ if (!dip) {
+ ret = -EINVAL;
+ goto err;
+ }
+
+ davinci_soc_info.cpu_id = dip->cpu_id;
+ pr_info("DaVinci %s variant 0x%x\n", dip->name, dip->variant);
return;
diff --git a/arch/arm/mach-davinci/dm355.c b/arch/arm/mach-davinci/dm355.c
index 6d1abfdcfb72..0f724c060084 100644
--- a/arch/arm/mach-davinci/dm355.c
+++ b/arch/arm/mach-davinci/dm355.c
@@ -534,9 +534,23 @@ static struct map_desc dm355_io_desc[] = {
},
};
+/* Contents of JTAG ID register used to identify exact cpu type */
+static struct davinci_id dm355_ids[] = {
+ {
+ .variant = 0x0,
+ .part_no = 0xb73b,
+ .manufacturer = 0x00f,
+ .cpu_id = DAVINCI_CPU_ID_DM355,
+ .name = "dm355",
+ },
+};
+
static struct davinci_soc_info davinci_soc_info_dm355 = {
.io_desc = dm355_io_desc,
.io_desc_num = ARRAY_SIZE(dm355_io_desc),
+ .jtag_id_base = IO_ADDRESS(0x01c40028),
+ .ids = dm355_ids,
+ .ids_num = ARRAY_SIZE(dm355_ids),
};
void __init dm355_init(void)
diff --git a/arch/arm/mach-davinci/dm644x.c b/arch/arm/mach-davinci/dm644x.c
index 79f113698b0b..9bcd98c6820b 100644
--- a/arch/arm/mach-davinci/dm644x.c
+++ b/arch/arm/mach-davinci/dm644x.c
@@ -388,7 +388,6 @@ MUX_CFG(DM644X, LOEEN, 0, 24, 1, 1, true)
MUX_CFG(DM644X, LFLDEN, 0, 25, 1, 1, false)
};
-
/*----------------------------------------------------------------------*/
static const s8 dma_chan_dm644x_no_event[] = {
@@ -475,9 +474,23 @@ static struct map_desc dm644x_io_desc[] = {
},
};
+/* Contents of JTAG ID register used to identify exact cpu type */
+static struct davinci_id dm644x_ids[] = {
+ {
+ .variant = 0x0,
+ .part_no = 0xb700,
+ .manufacturer = 0x017,
+ .cpu_id = DAVINCI_CPU_ID_DM6446,
+ .name = "dm6446",
+ },
+};
+
static struct davinci_soc_info davinci_soc_info_dm644x = {
.io_desc = dm644x_io_desc,
.io_desc_num = ARRAY_SIZE(dm644x_io_desc),
+ .jtag_id_base = IO_ADDRESS(0x01c40028),
+ .ids = dm644x_ids,
+ .ids_num = ARRAY_SIZE(dm644x_ids),
};
void __init dm644x_init(void)
diff --git a/arch/arm/mach-davinci/dm646x.c b/arch/arm/mach-davinci/dm646x.c
index 8547ec02c9e1..cd86bb78e0c1 100644
--- a/arch/arm/mach-davinci/dm646x.c
+++ b/arch/arm/mach-davinci/dm646x.c
@@ -454,9 +454,23 @@ static struct map_desc dm646x_io_desc[] = {
},
};
+/* Contents of JTAG ID register used to identify exact cpu type */
+static struct davinci_id dm646x_ids[] = {
+ {
+ .variant = 0x0,
+ .part_no = 0xb770,
+ .manufacturer = 0x017,
+ .cpu_id = DAVINCI_CPU_ID_DM6467,
+ .name = "dm6467",
+ },
+};
+
static struct davinci_soc_info davinci_soc_info_dm646x = {
.io_desc = dm646x_io_desc,
.io_desc_num = ARRAY_SIZE(dm646x_io_desc),
+ .jtag_id_base = IO_ADDRESS(0x01c40028),
+ .ids = dm646x_ids,
+ .ids_num = ARRAY_SIZE(dm646x_ids),
};
void __init dm646x_init(void)
diff --git a/arch/arm/mach-davinci/id.c b/arch/arm/mach-davinci/id.c
deleted file mode 100644
index 018b994cd794..000000000000
--- a/arch/arm/mach-davinci/id.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/*
- * Davinci CPU identification code
- *
- * Copyright (C) 2006 Komal Shah <komal_shah802003@yahoo.com>
- *
- * Derived from OMAP1 CPU identification code.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/io.h>
-
-#define JTAG_ID_BASE IO_ADDRESS(0x01c40028)
-
-static unsigned int davinci_revision;
-
-struct davinci_id {
- u8 variant; /* JTAG ID bits 31:28 */
- u16 part_no; /* JTAG ID bits 27:12 */
- u32 manufacturer; /* JTAG ID bits 11:1 */
- u32 type; /* Cpu id bits [31:8], cpu class bits [7:0] */
-};
-
-/* Register values to detect the DaVinci version */
-static struct davinci_id davinci_ids[] __initdata = {
- {
- /* DM6446 */
- .part_no = 0xb700,
- .variant = 0x0,
- .manufacturer = 0x017,
- .type = 0x64460000,
- },
- {
- /* DM646X */
- .part_no = 0xb770,
- .variant = 0x0,
- .manufacturer = 0x017,
- .type = 0x64670000,
- },
- {
- /* DM355 */
- .part_no = 0xb73b,
- .variant = 0x0,
- .manufacturer = 0x00f,
- .type = 0x03550000,
- },
-};
-
-/*
- * Get Device Part No. from JTAG ID register
- */
-static u16 __init davinci_get_part_no(void)
-{
- u32 dev_id, part_no;
-
- dev_id = __raw_readl(JTAG_ID_BASE);
-
- part_no = ((dev_id >> 12) & 0xffff);
-
- return part_no;
-}
-
-/*
- * Get Device Revision from JTAG ID register
- */
-static u8 __init davinci_get_variant(void)
-{
- u32 variant;
-
- variant = __raw_readl(JTAG_ID_BASE);
-
- variant = (variant >> 28) & 0xf;
-
- return variant;
-}
-
-unsigned int davinci_rev(void)
-{
- return davinci_revision >> 16;
-}
-EXPORT_SYMBOL(davinci_rev);
-
-void __init davinci_check_revision(void)
-{
- int i;
- u16 part_no;
- u8 variant;
-
- part_no = davinci_get_part_no();
- variant = davinci_get_variant();
-
- /* First check only the major version in a safe way */
- for (i = 0; i < ARRAY_SIZE(davinci_ids); i++) {
- if (part_no == (davinci_ids[i].part_no)) {
- davinci_revision = davinci_ids[i].type;
- break;
- }
- }
-
- /* Check if we can find the dev revision */
- for (i = 0; i < ARRAY_SIZE(davinci_ids); i++) {
- if (part_no == davinci_ids[i].part_no &&
- variant == davinci_ids[i].variant) {
- davinci_revision = davinci_ids[i].type;
- break;
- }
- }
-
- printk(KERN_INFO "DaVinci DM%04x variant 0x%x\n",
- davinci_rev(), variant);
-}
diff --git a/arch/arm/mach-davinci/include/mach/common.h b/arch/arm/mach-davinci/include/mach/common.h
index 770a1baa97dc..ece1cd42738f 100644
--- a/arch/arm/mach-davinci/include/mach/common.h
+++ b/arch/arm/mach-davinci/include/mach/common.h
@@ -28,11 +28,15 @@ extern void setup_usb(unsigned mA, unsigned potpgt_msec);
struct davinci_soc_info {
struct map_desc *io_desc;
unsigned long io_desc_num;
+ u32 cpu_id;
+ u32 jtag_id;
+ void __iomem *jtag_id_base;
+ struct davinci_id *ids;
+ unsigned long ids_num;
};
extern struct davinci_soc_info davinci_soc_info;
extern void davinci_common_init(struct davinci_soc_info *soc_info);
-extern void davinci_check_revision(void);
#endif /* __ARCH_ARM_MACH_DAVINCI_COMMON_H */
diff --git a/arch/arm/mach-davinci/include/mach/cputype.h b/arch/arm/mach-davinci/include/mach/cputype.h
index 27cfb1b3a662..d12a5ed2959a 100644
--- a/arch/arm/mach-davinci/include/mach/cputype.h
+++ b/arch/arm/mach-davinci/include/mach/cputype.h
@@ -16,17 +16,30 @@
#ifndef _ASM_ARCH_CPU_H
#define _ASM_ARCH_CPU_H
-extern unsigned int davinci_rev(void);
+#include <mach/common.h>
-#define IS_DAVINCI_CPU(type, id) \
-static inline int is_davinci_dm ##type(void) \
-{ \
- return (davinci_rev() == (id)) ? 1 : 0; \
+struct davinci_id {
+ u8 variant; /* JTAG ID bits 31:28 */
+ u16 part_no; /* JTAG ID bits 27:12 */
+ u16 manufacturer; /* JTAG ID bits 11:1 */
+ u32 cpu_id;
+ char *name;
+};
+
+/* Can use lower 16 bits of cpu id for a variant when required */
+#define DAVINCI_CPU_ID_DM6446 0x64460000
+#define DAVINCI_CPU_ID_DM6467 0x64670000
+#define DAVINCI_CPU_ID_DM355 0x03550000
+
+#define IS_DAVINCI_CPU(type, id) \
+static inline int is_davinci_ ##type(void) \
+{ \
+ return (davinci_soc_info.cpu_id == (id)); \
}
-IS_DAVINCI_CPU(644x, 0x6446)
-IS_DAVINCI_CPU(646x, 0x6467)
-IS_DAVINCI_CPU(355, 0x355)
+IS_DAVINCI_CPU(dm644x, DAVINCI_CPU_ID_DM6446)
+IS_DAVINCI_CPU(dm646x, DAVINCI_CPU_ID_DM6467)
+IS_DAVINCI_CPU(dm355, DAVINCI_CPU_ID_DM355)
#ifdef CONFIG_ARCH_DAVINCI_DM644x
#define cpu_is_davinci_dm644x() is_davinci_dm644x()
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-02 17:36:50 +0300