ARM: OMAP2: Fix cpu detection (a8823143) · Commits · e / devices / android_kernel_teracube_2e

arch/arm/mach-omap1/id.c

+0 −3

Original line number	Diff line number	Diff line
		@@ -178,9 +178,6 @@ void __init omap_check_revision(void)
		case 0x17:
		system_rev \|= 0x16;
		break;
		case 0x24:
		system_rev \|= 0x24;
		break;
		default:
		printk("Unknown OMAP cpu type: 0x%02x\n", cpu_type);
		}

arch/arm/mach-omap2/clock34xx.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -475,7 +475,7 @@ int __init omap2_clk_init(void)
		* Update this if there are further clock changes between ES2
		* and production parts
		*/
		if (is_sil_rev_equal_to(OMAP3430_REV_ES1_0)) {
		if (system_rev == OMAP3430_REV_ES1_0) {
		/* No 3430ES1-only rates exist, so no RATE_IN_3430ES1 */
		cpu_clkflg \|= CLOCK_IN_OMAP3430ES1;
		} else {

arch/arm/mach-omap2/id.c

+119 −171

Original line number	Diff line number	Diff line
		@@ -22,39 +22,6 @@
		#include <mach/control.h>
		#include <mach/cpu.h>

		static u32 class;
		static void __iomem *tap_base;
		static u16 tap_prod_id;

		#define OMAP_TAP_IDCODE 0x0204
		#define OMAP_TAP_DIE_ID_0 0x0218
		#define OMAP_TAP_DIE_ID_1 0x021C
		#define OMAP_TAP_DIE_ID_2 0x0220
		#define OMAP_TAP_DIE_ID_3 0x0224

		/* system_rev fields for OMAP2 processors:
		* CPU id bits [31:16],
		* CPU device type [15:12], (unprg,normal,POP)
		* CPU revision [11:08]
		* CPU class bits [07:00]
		*/

		struct omap_id {
		u16 hawkeye; /* Silicon type (Hawkeye id) */
		u8 dev; /* Device type from production_id reg */
		u32 type; /* combined type id copied to system_rev */
		};

		/* Register values to detect the OMAP version */
		static struct omap_id omap_ids[] __initdata = {
		{ .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200000 },
		{ .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201000 },
		{ .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202000 },
		{ .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220000 },
		{ .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230000 },
		{ .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300000 },
		};

		static struct omap_chip_id omap_chip;

		/**
		@@ -70,135 +37,41 @@ int omap_chip_is(struct omap_chip_id oci)
		}
		EXPORT_SYMBOL(omap_chip_is);

		static u32 __init read_tap_reg(int reg)
		{
		unsigned int regval = 0;
		u32 cpuid;

		/* Reading the IDCODE register on 3430 ES1 results in a
		* data abort as the register is not exposed on the OCP
		* Hence reading the Cortex Rev
		*/
		cpuid = read_cpuid(CPUID_ID);

		/* If the processor type is Cortex-A8 and the revision is 0x0
		* it means its Cortex r0p0 which is 3430 ES1
		*/
		if ((((cpuid >> 4) & 0xFFF) == 0xC08) && ((cpuid & 0xF) == 0x0)) {

		if (reg == tap_prod_id) {
		regval = 0x000F00F0;
		goto out;
		}
		/----------------------------------------------------------------------------/

		switch (reg) {
		case OMAP_TAP_IDCODE : regval = 0x0B7AE02F; break;
		/* Making DevType as 0xF in ES1 to differ from ES2 */
		case OMAP_TAP_DIE_ID_0: regval = 0x01000000; break;
		case OMAP_TAP_DIE_ID_1: regval = 0x1012d687; break;
		case OMAP_TAP_DIE_ID_2: regval = 0x00000000; break;
		case OMAP_TAP_DIE_ID_3: regval = 0x2d2c0000; break;
		}
		} else
		regval = __raw_readl(tap_base + reg);

		out:
		return regval;

		}

		/*
		* _set_system_rev - set the system_rev global based on current OMAP chip type
		*
		* Set the system_rev global. This is primarily used by the cpu_is_omapxxxx()
		* macros.
		*/
		static void __init _set_system_rev(u32 type, u8 rev)
		{
		u32 i, ctrl_status;

		/*
		* system_rev encoding is as follows
		* system_rev & 0xff000000 -> Omap Class (24xx/34xx)
		* system_rev & 0xfff00000 -> Omap Sub Class (242x/343x)
		* system_rev & 0xffff0000 -> Omap type (2420/2422/2423/2430/3430)
		* system_rev & 0x0000f000 -> Silicon revision (ES1, ES2 )
		* system_rev & 0x00000700 -> Device Type ( EMU/HS/GP/BAD )
		* system_rev & 0x000000c0 -> IDCODE revision[6:7]
		* system_rev & 0x0000003f -> sys_boot[0:5]
		*/
		/* Embedding the ES revision info in type field */
		system_rev = type;
		/* Also add IDCODE revision info only two lower bits */
		system_rev \|= ((rev & 0x3) << 6);

		/* Add in the device type and sys_boot fields (see above) */
		if (cpu_is_omap24xx()) {
		i = OMAP24XX_CONTROL_STATUS;
		} else if (cpu_is_omap343x()) {
		i = OMAP343X_CONTROL_STATUS;
		} else {
		printk(KERN_ERR "id: unknown CPU type\n");
		BUG();
		}
		ctrl_status = omap_ctrl_readl(i);
		system_rev \|= (ctrl_status & (OMAP2_SYSBOOT_5_MASK \|
		OMAP2_SYSBOOT_4_MASK \|
		OMAP2_SYSBOOT_3_MASK \|
		OMAP2_SYSBOOT_2_MASK \|
		OMAP2_SYSBOOT_1_MASK \|
		OMAP2_SYSBOOT_0_MASK));
		system_rev \|= (ctrl_status & OMAP2_DEVICETYPE_MASK);
		}


		/*
		* _set_omap_chip - set the omap_chip global based on OMAP chip type
		*
		* Build the omap_chip bits. This variable is used by powerdomain and
		* clockdomain code to indicate whether structures are applicable for
		* the current OMAP chip type by ANDing it against a 'platform' bitfield
		* in the structure.
		*/
		static void __init _set_omap_chip(void)
		{
		if (cpu_is_omap343x()) {

		omap_chip.oc = CHIP_IS_OMAP3430;
		if (is_sil_rev_equal_to(OMAP3430_REV_ES1_0))
		omap_chip.oc \|= CHIP_IS_OMAP3430ES1;
		else if (is_sil_rev_greater_than(OMAP3430_REV_ES1_0))
		omap_chip.oc \|= CHIP_IS_OMAP3430ES2;

		} else if (cpu_is_omap243x()) {

		/* Currently only supports 2430ES2.1 and 2430-all */
		omap_chip.oc \|= CHIP_IS_OMAP2430;

		} else if (cpu_is_omap242x()) {
		#define OMAP_TAP_IDCODE 0x0204
		#define OMAP_TAP_DIE_ID_0 0x0218
		#define OMAP_TAP_DIE_ID_1 0x021C
		#define OMAP_TAP_DIE_ID_2 0x0220
		#define OMAP_TAP_DIE_ID_3 0x0224

		/* Currently only supports 2420ES2.1.1 and 2420-all */
		omap_chip.oc \|= CHIP_IS_OMAP2420;
		#define read_tap_reg(reg) __raw_readl(tap_base + (reg))

		} else {

		/* Current CPU not supported by this code. */
		printk(KERN_WARNING "OMAP chip type code does not yet support "
		"this CPU type.\n");
		WARN_ON(1);
		struct omap_id {
		u16 hawkeye; /* Silicon type (Hawkeye id) */
		u8 dev; /* Device type from production_id reg */
		u32 type; /* Combined type id copied to system_rev */
		};

		}
		/* Register values to detect the OMAP version */
		static struct omap_id omap_ids[] __initdata = {
		{ .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 },
		{ .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 },
		{ .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 },
		{ .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 },
		{ .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 },
		{ .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 },
		};

		}
		static void __iomem *tap_base;
		static u16 tap_prod_id;

		void __init omap24xx_check_revision(void)
		{
		int i, j;
		u32 idcode;
		u32 prod_id;
		u32 idcode, prod_id;
		u16 hawkeye;
		u8 dev_type;
		u8 rev;
		u8 dev_type, rev;

		idcode = read_tap_reg(OMAP_TAP_IDCODE);
		prod_id = read_tap_reg(tap_prod_id);
		@@ -220,18 +93,6 @@ void __init omap24xx_check_revision(void)
		pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
		prod_id, dev_type);

		/*
		* Detection for 34xx ES2.0 and above can be done with just
		* hawkeye and rev. See TRM 1.5.2 Device Identification.
		* Note that rev cannot be used directly as ES1.0 uses value 0.
		*/
		if (hawkeye == 0xb7ae) {
		system_rev = 0x34300000 \| ((1 + rev) << 12);
		pr_info("OMAP%04x ES2.%i\n", system_rev >> 16, rev);
		_set_omap_chip();
		return;
		}

		/* Check hawkeye ids */
		for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
		if (hawkeye == omap_ids[i].hawkeye)
		@@ -255,28 +116,115 @@ void __init omap24xx_check_revision(void)
		j = i;
		}

		_set_system_rev(omap_ids[j].type, rev);

		_set_omap_chip();

		pr_info("OMAP%04x", system_rev >> 16);
		if ((system_rev >> 8) & 0x0f)
		pr_info("ES%x", (system_rev >> 12) & 0xf);
		pr_info("\n");
		}

		void __init omap34xx_check_revision(void)
		{
		u32 cpuid, idcode;
		u16 hawkeye;
		u8 rev;
		char *rev_name = "ES1.0";

		/*
		* We cannot access revision registers on ES1.0.
		* If the processor type is Cortex-A8 and the revision is 0x0
		* it means its Cortex r0p0 which is 3430 ES1.0.
		*/
		cpuid = read_cpuid(CPUID_ID);
		if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
		system_rev = OMAP3430_REV_ES1_0;
		goto out;
		}

		/*
		* Detection for 34xx ES2.0 and above can be done with just
		* hawkeye and rev. See TRM 1.5.2 Device Identification.
		* Note that rev does not map directly to our defined processor
		* revision numbers as ES1.0 uses value 0.
		*/
		idcode = read_tap_reg(OMAP_TAP_IDCODE);
		hawkeye = (idcode >> 12) & 0xffff;
		rev = (idcode >> 28) & 0xff;

		if (hawkeye == 0xb7ae) {
		switch (rev) {
		case 0:
		system_rev = OMAP3430_REV_ES2_0;
		rev_name = "ES2.0";
		break;
		case 2:
		system_rev = OMAP3430_REV_ES2_1;
		rev_name = "ES2.1";
		break;
		case 3:
		system_rev = OMAP3430_REV_ES3_0;
		rev_name = "ES3.0";
		break;
		default:
		/* Use the latest known revision as default */
		system_rev = OMAP3430_REV_ES3_0;
		rev_name = "Unknown revision\n";
		}
		}

		out:
		pr_info("OMAP%04x %s\n", system_rev >> 16, rev_name);
		}

		/*
		* Try to detect the exact revision of the omap we're running on
		*/
		void __init omap2_check_revision(void)
		{
		/*
		* At this point we have an idea about the processor revision set
		* earlier with omap2_set_globals_tap().
		*/
		if (cpu_is_omap24xx())
		omap24xx_check_revision();
		else if (cpu_is_omap34xx())
		omap34xx_check_revision();
		else
		pr_err("OMAP revision unknown, please fix!\n");

		/*
		* OK, now we know the exact revision. Initialize omap_chip bits
		* for powerdowmain and clockdomain code.
		*/
		if (cpu_is_omap243x()) {
		/* Currently only supports 2430ES2.1 and 2430-all */
		omap_chip.oc \|= CHIP_IS_OMAP2430;
		} else if (cpu_is_omap242x()) {
		/* Currently only supports 2420ES2.1.1 and 2420-all */
		omap_chip.oc \|= CHIP_IS_OMAP2420;
		} else if (cpu_is_omap343x()) {
		omap_chip.oc = CHIP_IS_OMAP3430;
		if (system_rev == OMAP3430_REV_ES1_0)
		omap_chip.oc \|= CHIP_IS_OMAP3430ES1;
		else if (system_rev > OMAP3430_REV_ES1_0)
		omap_chip.oc \|= CHIP_IS_OMAP3430ES2;
		} else {
		pr_err("Uninitialized omap_chip, please fix!\n");
		}
		}

		/*
		* Set up things for map_io and processor detection later on. Gets called
		* pretty much first thing from board init. For multi-omap, this gets
		* cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to
		* detect the exact revision later on in omap2_detect_revision() once map_io
		* is done.
		*/
		void __init omap2_set_globals_tap(struct omap_globals *omap2_globals)
		{
		class = omap2_globals->class;
		system_rev = omap2_globals->class;
		tap_base = omap2_globals->tap;

		if (class == 0x3430)
		if (cpu_is_omap34xx())
		tap_prod_id = 0x0210;
		else
		tap_prod_id = 0x0208;

arch/arm/plat-omap/include/mach/cpu.h

+25 −51

Original line number	Diff line number	Diff line
		@@ -28,14 +28,19 @@

		struct omap_chip_id {
		u8 oc;
		u8 type;
		};

		#define OMAP_CHIP_INIT(x) { .oc = x }

		/*
		* system_rev bits:
		* CPU id bits (0730, 1510, 1710, 2422...) [31:16]
		* CPU revision (See _REV_ defined in cpu.h) [15:08]
		* CPU class bits (15xx, 16xx, 24xx, 34xx...) [07:00]
		*/
		extern unsigned int system_rev;

		#define omap2_cpu_rev() ((system_rev >> 12) & 0x0f)

		/*
		* Test if multicore OMAP support is needed
		*/
		@@ -108,7 +113,7 @@ extern unsigned int system_rev;
		* cpu_is_omap243x(): True for OMAP2430
		* cpu_is_omap343x(): True for OMAP3430
		*/
		#define GET_OMAP_CLASS ((system_rev >> 24) & 0xff)
		#define GET_OMAP_CLASS (system_rev & 0xff)

		#define IS_OMAP_CLASS(class, id) \
		static inline int is_omap ##class (void) \
		@@ -320,44 +325,20 @@ IS_OMAP_TYPE(3430, 0x3430)
		#define cpu_class_is_omap2() (cpu_is_omap24xx() \|\| cpu_is_omap34xx())

		#if defined(CONFIG_ARCH_OMAP2) \|\| defined(CONFIG_ARCH_OMAP3)
		/*
		* Macros to detect silicon revision of OMAP2/3 processors.
		* is_sil_rev_greater_than: true if passed cpu type & its rev is greater.
		* is_sil_rev_lesser_than: true if passed cpu type & its rev is lesser.
		* is_sil_rev_equal_to: true if passed cpu type & its rev is equal.
		* get_sil_rev: return the silicon rev value.
		*/
		#define get_sil_omap_type(rev) ((rev & 0xffff0000) >> 16)
		#define get_sil_revision(rev) ((rev & 0x0000f000) >> 12)

		#define is_sil_rev_greater_than(rev) \
		((get_sil_omap_type(system_rev) == get_sil_omap_type(rev)) && \
		(get_sil_revision(system_rev) > get_sil_revision(rev)))
		/* Various silicon revisions for omap2 */
		#define OMAP242X_CLASS 0x24200024
		#define OMAP2420_REV_ES1_0 0x24200024
		#define OMAP2420_REV_ES2_0 0x24201024

		#define is_sil_rev_less_than(rev) \
		((get_sil_omap_type(system_rev) == get_sil_omap_type(rev)) && \
		(get_sil_revision(system_rev) < get_sil_revision(rev)))
		#define OMAP243X_CLASS 0x24300024
		#define OMAP2430_REV_ES1_0 0x24300024

		#define is_sil_rev_equal_to(rev) \
		((get_sil_omap_type(system_rev) == get_sil_omap_type(rev)) && \
		(get_sil_revision(system_rev) == get_sil_revision(rev)))

		#define get_sil_rev() \
		get_sil_revision(system_rev)

		/* Various silicon macros defined here */
		#define OMAP242X_CLASS 0x24200000
		#define OMAP2420_REV_ES1_0 0x24200000
		#define OMAP2420_REV_ES2_0 0x24201000

		#define OMAP243X_CLASS 0x24300000
		#define OMAP2430_REV_ES1_0 0x24300000

		#define OMAP343X_CLASS 0x34300000
		#define OMAP3430_REV_ES1_0 0x34300000
		#define OMAP3430_REV_ES2_0 0x34301000
		#define OMAP3430_REV_ES2_1 0x34302000
		#define OMAP3430_REV_ES2_2 0x34303000
		#define OMAP343X_CLASS 0x34300034
		#define OMAP3430_REV_ES1_0 0x34300034
		#define OMAP3430_REV_ES2_0 0x34301034
		#define OMAP3430_REV_ES2_1 0x34302034
		#define OMAP3430_REV_ES3_0 0x34303034

		/*
		* omap_chip bits
		@@ -382,23 +363,16 @@ IS_OMAP_TYPE(3430, 0x3430)
		#define CHIP_IS_OMAP24XX (CHIP_IS_OMAP2420 \| CHIP_IS_OMAP2430)

		int omap_chip_is(struct omap_chip_id oci);

		int omap_type(void);

		/*
		* Macro to detect device type i.e. EMU/HS/TST/GP/BAD
		*/
		#define DEVICE_TYPE_TEST 0
		#define DEVICE_TYPE_EMU 1
		#define DEVICE_TYPE_SEC 2
		#define DEVICE_TYPE_GP 3
		#define DEVICE_TYPE_BAD 4

		#define get_device_type() ((system_rev & 0x700) >> 8)
		#define is_device_type_test() (get_device_type() == DEVICE_TYPE_TEST)
		#define is_device_type_emu() (get_device_type() == DEVICE_TYPE_EMU)
		#define is_device_type_sec() (get_device_type() == DEVICE_TYPE_SEC)
		#define is_device_type_gp() (get_device_type() == DEVICE_TYPE_GP)
		#define is_device_type_bad() (get_device_type() == DEVICE_TYPE_BAD)
		#define OMAP2_DEVICE_TYPE_TEST 0
		#define OMAP2_DEVICE_TYPE_EMU 1
		#define OMAP2_DEVICE_TYPE_SEC 2
		#define OMAP2_DEVICE_TYPE_GP 3
		#define OMAP2_DEVICE_TYPE_BAD 4

		void omap2_check_revision(void);