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ARM: tegra: SoC-specific core code changes

Browse source 
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.
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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>
This commit is contained in:
Olof Johansson 2013-12-26 11:02:19 -08:00
commit d578759ed8
5 changed files with 54 additions and 40 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

34
arch/arm/include/debug/tegra.S
View file

@ -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

1
arch/arm/mach-tegra/Kconfig
View file

@ -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

41
arch/arm/mach-tegra/fuse.c
View file

@ -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;

14
arch/arm/mach-tegra/iomap.h
View file

@ -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)))

4
arch/arm/mach-tegra/tegra.c
View file

@ -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)