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authorOlof Johansson <olof@lixom.net>2013-12-26 20:02:19 +0100
committerOlof Johansson <olof@lixom.net>2013-12-26 20:02:25 +0100
commitd578759ed8a6babd9c9aecd4211b3aa5a8e4a27b (patch)
treec56d17ab42d6e919be1cbbeb151ce31a13c7cc83 /arch/arm
parentMerge tag 'tegra-for-3.14-powergate' of git://git.kernel.org/pub/scm/linux/ke... (diff)
parentARM: tegra: select PINCTRL_TEGRA124 for Tegra124 SoC (diff)
downloadlinux-d578759ed8a6babd9c9aecd4211b3aa5a8e4a27b.tar.xz
linux-d578759ed8a6babd9c9aecd4211b3aa5a8e4a27b.zip
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>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/include/debug/tegra.S34
-rw-r--r--arch/arm/mach-tegra/Kconfig1
-rw-r--r--arch/arm/mach-tegra/fuse.c41
-rw-r--r--arch/arm/mach-tegra/iomap.h14
-rw-r--r--arch/arm/mach-tegra/tegra.c4
5 files changed, 54 insertions, 40 deletions
diff --git a/arch/arm/include/debug/tegra.S b/arch/arm/include/debug/tegra.S
index be6a720dd183..f98763f0bc17 100644
--- a/arch/arm/include/debug/tegra.S
+++ b/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
diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig
index 15c09294effa..d1a12a496525 100644
--- a/arch/arm/mach-tegra/Kconfig
+++ b/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
diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c
index 3a9c1f1c219d..c9ac23b385be 100644
--- a/arch/arm/mach-tegra/fuse.c
+++ b/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;
diff --git a/arch/arm/mach-tegra/iomap.h b/arch/arm/mach-tegra/iomap.h
index 26b1c2ad0ceb..ee79808e93a3 100644
--- a/arch/arm/mach-tegra/iomap.h
+++ b/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)))
diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index 73368176c6e8..ea14d380fc0c 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/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)