ARM: tegra: SoC-specific core code changes

This branch contains various miscellaneous changes to code in the
 mach-tegra/ directory. It is baased on v3.13-rc1, and shouldn't conflict
 with anything else.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.11 (GNU/Linux)
 
 iQIcBAABAgAGBQJSr3IGAAoJEMzrak5tbycxVVUP/09VfeFYOidIm6mgbWSMlL4l
 DEPzrGBOvyO60og4LIbDIgwDzkcEsxIF9erlrVTz1Fvh2p0P0sQycIKjvyhvNXeh
 Ft9TQ1kDHjoJcfHI9f8tapkmwhOG+6vy2gDrTPmyxjnLpiE5ccM18CCr5CMK+y2v
 Ojzmf2paPBFyI84gcdWuwF4Ze2YmwdHmG7TksG/PZrpicizSxe+d9wNVDBMkJnP6
 QFicMU6DEFZVwwDkFx4qPYrFDJPk8dqcAmNl+F+9jGEqTmxA+7M8eOF/SQa62lwa
 OJrVugD8YigT5NjRW/9btOVY/jUHbg0Ekj5DXd7Q9rO5KNUrFDRSia5XiWmms/S8
 QNJezmjNgA83OQDefuAkpsKydf1XGoyIQ9EjDUb4i807PRwTO4En+1pD0EpEWSet
 0c1mfDvU5uC6L9A5VvR0pzyGz2U2EhNhkUz03WAqtWYdrR68vIZHNZVIvHOLuwWF
 fDkS26KxziOmKM1ePdL7wemuNOod8ACeyzXMa2dhR68l6LH1X1pnMaoxvk2AjETk
 SMat9tsxY827+TtQlAQ+4bdR3qXqYsQLD7VWOPO0V3fs5T08jVZrpJ9pHDRYW88K
 dGHmIW4sHXKXP4Qw9rDGWSkWZeOVJYr72U6uH9vbg8hK6Wi2eAMxZ27ngFiqahSK
 PIhnAfsdM2/FX+C+vu58
 =Oztt
 -----END PGP SIGNATURE-----

Merge tag 'tegra-for-3.14-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into next/soc

From Stephen Warren:
ARM: tegra: SoC-specific core code changes

This branch contains various miscellaneous changes to code in the
mach-tegra/ directory. It is baased on v3.13-rc1, and shouldn't conflict
with anything else.

* tag 'tegra-for-3.14-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  ARM: tegra: select PINCTRL_TEGRA124 for Tegra124 SoC
  ARM: tegra: use section-sized static mappings for LPAE too
  ARM: tegra: don't hard-code DEBUG_LL baud rate
  ARM: tegra: fix DEBUG_LL combined with LPAE
  ARM: tegra: switch FUSE clock on before usage

Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/include/debug/tegra.S

@@ -46,10 +46,10 @@
 #define TEGRA_APB_MISC_GP_HIDREV	(TEGRA_APB_MISC_BASE + 0x804)
 
 /*
- * Must be 1MB-aligned since a 1MB mapping is used early on.
+ * Must be section-aligned since a section mapping is used early on.
  * Must not overlap with regions in mach-tegra/io.c:tegra_io_desc[].
  */
-#define UART_VIRTUAL_BASE		0xfe100000
+#define UART_VIRTUAL_BASE		0xfe800000
 
 #define checkuart(rp, rv, lhu, bit, uart) \
 		/* Load address of CLK_RST register */ \
@@ -156,28 +156,6 @@
 92:		and	\rv, \rp, #0xffffff	@ offset within 1MB section
 		add	\rv, \rv, #UART_VIRTUAL_BASE
 		str	\rv, [\tmp, #8]		@ Store in tegra_uart_virt
-		movw	\rv, #TEGRA_APB_MISC_GP_HIDREV & 0xffff
-		movt	\rv, #TEGRA_APB_MISC_GP_HIDREV >> 16
-		ldr	\rv, [\rv, #0]		@ Load HIDREV
-		ubfx	\rv, \rv, #8, #8	@ 15:8 are SoC version
-		cmp	\rv, #0x20		@ Tegra20?
-		moveq	\rv, #0x75		@ Tegra20 divisor
-		movne	\rv, #0xdd		@ Tegra30 divisor
-		str	\rv, [\tmp, #12]	@ Save divisor to scratch
-		/* uart[UART_LCR] = UART_LCR_WLEN8 | UART_LCR_DLAB; */
-		mov	\rv, #UART_LCR_WLEN8 | UART_LCR_DLAB
-		str	\rv, [\rp, #UART_LCR << UART_SHIFT]
-		/* uart[UART_DLL] = div & 0xff; */
-		ldr	\rv, [\tmp, #12]
-		and	\rv, \rv, #0xff
-		str	\rv, [\rp, #UART_DLL << UART_SHIFT]
-		/* uart[UART_DLM] = div >> 8; */
-		ldr	\rv, [\tmp, #12]
-		lsr	\rv, \rv, #8
-		str	\rv, [\rp, #UART_DLM << UART_SHIFT]
-		/* uart[UART_LCR] = UART_LCR_WLEN8; */
-		mov	\rv, #UART_LCR_WLEN8
-		str	\rv, [\rp, #UART_LCR << UART_SHIFT]
 		b	100f
 
 		.align
@@ -205,8 +183,8 @@
 		cmp	\rx, #0
 		beq	1002f
 1001:		ldrb	\rd, [\rx, #UART_LSR << UART_SHIFT]
-		and	\rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
-		teq	\rd, #UART_LSR_TEMT | UART_LSR_THRE
+		and	\rd, \rd, #UART_LSR_THRE
+		teq	\rd, #UART_LSR_THRE
 		bne	1001b
 1002:
 		.endm
@@ -225,7 +203,7 @@
 /*
  * Storage for the state maintained by the macros above.
  *
- * In the kernel proper, this data is located in arch/arm/mach-tegra/common.c.
+ * In the kernel proper, this data is located in arch/arm/mach-tegra/tegra.c.
  * That's because this header is included from multiple files, and we only
  * want a single copy of the data. In particular, the UART probing code above
  * assumes it's running using physical addresses. This is true when this file
@@ -247,6 +225,4 @@ tegra_uart_config:
 	.word 0
 	/* Debug UART virtual address */
 	.word 0
-	/* Scratch space for debug macro */
-	.word 0
 #endif

arch/arm/mach-tegra/Kconfig

@@ -65,6 +65,7 @@ config ARCH_TEGRA_124_SOC
 	bool "Enable support for Tegra124 family"
 	select ARM_L1_CACHE_SHIFT_6
 	select HAVE_ARM_ARCH_TIMER
+	select PINCTRL_TEGRA124
 	help
 	  Support for NVIDIA Tegra T124 processor family, based on the
 	  ARM CortexA15MP CPU

arch/arm/mach-tegra/fuse.c

@@ -22,6 +22,7 @@
 #include <linux/io.h>
 #include <linux/export.h>
 #include <linux/random.h>
+#include <linux/clk.h>
 #include <linux/tegra-soc.h>
 
 #include "fuse.h"
@@ -54,6 +55,7 @@ int tegra_cpu_speedo_id;		/* only exist in Tegra30 and later */
 int tegra_soc_speedo_id;
 enum tegra_revision tegra_revision;
 
+static struct clk *fuse_clk;
 static int tegra_fuse_spare_bit;
 static void (*tegra_init_speedo_data)(void);
 
@@ -77,6 +79,22 @@ static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
 	[TEGRA_REVISION_A04]     = "A04",
 };
 
+static void tegra_fuse_enable_clk(void)
+{
+	if (IS_ERR(fuse_clk))
+		fuse_clk = clk_get_sys(NULL, "fuse");
+	if (IS_ERR(fuse_clk))
+		return;
+	clk_prepare_enable(fuse_clk);
+}
+
+static void tegra_fuse_disable_clk(void)
+{
+	if (IS_ERR(fuse_clk))
+		return;
+	clk_disable_unprepare(fuse_clk);
+}
+
 u32 tegra_fuse_readl(unsigned long offset)
 {
 	return tegra_apb_readl(TEGRA_FUSE_BASE + offset);
@@ -84,7 +102,15 @@ u32 tegra_fuse_readl(unsigned long offset)
 
 bool tegra_spare_fuse(int bit)
 {
-	return tegra_fuse_readl(tegra_fuse_spare_bit + bit * 4);
+	bool ret;
+
+	tegra_fuse_enable_clk();
+
+	ret = tegra_fuse_readl(tegra_fuse_spare_bit + bit * 4);
+
+	tegra_fuse_disable_clk();
+
+	return ret;
 }
 
 static enum tegra_revision tegra_get_revision(u32 id)
@@ -113,10 +139,14 @@ static void tegra_get_process_id(void)
 {
 	u32 reg;
 
+	tegra_fuse_enable_clk();
+
 	reg = tegra_fuse_readl(tegra_fuse_spare_bit);
 	tegra_cpu_process_id = (reg >> 6) & 3;
 	reg = tegra_fuse_readl(tegra_fuse_spare_bit);
 	tegra_core_process_id = (reg >> 12) & 3;
+
+	tegra_fuse_disable_clk();
 }
 
 u32 tegra_read_chipid(void)
@@ -159,6 +189,15 @@ void __init tegra_init_fuse(void)
 	reg |= 1 << 28;
 	writel(reg, IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x48));
 
+	/*
+	 * Enable FUSE clock. This needs to be hardcoded because the clock
+	 * subsystem is not active during early boot.
+	 */
+	reg = readl(IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x14));
+	reg |= 1 << 7;
+	writel(reg, IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x14));
+	fuse_clk = ERR_PTR(-EINVAL);
+
 	reg = tegra_fuse_readl(FUSE_SKU_INFO);
 	randomness[0] = reg;
 	tegra_sku_id = reg & 0xFF;

arch/arm/mach-tegra/iomap.h

@@ -19,6 +19,7 @@
 #ifndef __MACH_TEGRA_IOMAP_H
 #define __MACH_TEGRA_IOMAP_H
 
+#include <asm/pgtable.h>
 #include <asm/sizes.h>
 
 #define TEGRA_IRAM_BASE			0x40000000
@@ -115,27 +116,26 @@
  * two 256MB io windows (that actually only use about 64KB
  * at the start of each).
  *
- * We will just map the first 1MB of each window (to minimize
+ * We will just map the first MMU section of each window (to minimize
  * pt entries needed) and provide a macro to transform physical
  * io addresses to an appropriate void __iomem *.
- *
  */
 
 #define IO_IRAM_PHYS	0x40000000
 #define IO_IRAM_VIRT	IOMEM(0xFE400000)
 #define IO_IRAM_SIZE	SZ_256K
 
-#define IO_CPU_PHYS     0x50040000
-#define IO_CPU_VIRT     IOMEM(0xFE000000)
+#define IO_CPU_PHYS	0x50040000
+#define IO_CPU_VIRT	IOMEM(0xFE440000)
 #define IO_CPU_SIZE	SZ_16K
 
 #define IO_PPSB_PHYS	0x60000000
 #define IO_PPSB_VIRT	IOMEM(0xFE200000)
-#define IO_PPSB_SIZE	SZ_1M
+#define IO_PPSB_SIZE	SECTION_SIZE
 
 #define IO_APB_PHYS	0x70000000
-#define IO_APB_VIRT	IOMEM(0xFE300000)
-#define IO_APB_SIZE	SZ_1M
+#define IO_APB_VIRT	IOMEM(0xFE000000)
+#define IO_APB_SIZE	SECTION_SIZE
 
 #define IO_TO_VIRT_BETWEEN(p, st, sz)	((p) >= (st) && (p) < ((st) + (sz)))
 #define IO_TO_VIRT_XLATE(p, pst, vst)	(((p) - (pst) + (vst)))

arch/arm/mach-tegra/tegra.c

@@ -60,15 +60,13 @@
  * kernel is loaded. The data is declared here rather than debug-macro.S so
  * that multiple inclusions of debug-macro.S point at the same data.
  */
-u32 tegra_uart_config[4] = {
+u32 tegra_uart_config[3] = {
 	/* Debug UART initialization required */
 	1,
 	/* Debug UART physical address */
 	0,
 	/* Debug UART virtual address */
 	0,
-	/* Scratch space for debug macro */
-	0,
 };
 
 static void __init tegra_init_cache(void)