- 根目录:
- arch
- mips
- powertv
- asic
- asic_devices.c
/*
*
* Description: Defines the platform resources for Gaia-based settops.
*
* Copyright (C) 2005-2009 Scientific-Atlanta, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* NOTE: The bootloader allocates persistent memory at an address which is
* 16 MiB below the end of the highest address in KSEG0. All fixed
* address memory reservations must avoid this region.
*/
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/resource.h>
#include <linux/serial_reg.h>
#include <linux/io.h>
#include <linux/bootmem.h>
#include <linux/mm.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <asm/page.h>
#include <linux/swap.h>
#include <linux/highmem.h>
#include <linux/dma-mapping.h>
#include <asm/mach-powertv/asic.h>
#include <asm/mach-powertv/asic_regs.h>
#include <asm/mach-powertv/interrupts.h>
#ifdef CONFIG_BOOTLOADER_DRIVER
#include <asm/mach-powertv/kbldr.h>
#endif
#include <asm/bootinfo.h>
#define BOOTLDRFAMILY(byte1, byte0) (((byte1) << 8) | (byte0))
/*
* Forward Prototypes
*/
static void pmem_setup_resource(void);
/*
* Global Variables
*/
enum asic_type asic;
unsigned int platform_features;
unsigned int platform_family;
struct register_map _asic_register_map;
EXPORT_SYMBOL(_asic_register_map); /* Exported for testing */
unsigned long asic_phy_base;
unsigned long asic_base;
EXPORT_SYMBOL(asic_base); /* Exported for testing */
struct resource *gp_resources;
/*
* Don't recommend to use it directly, it is usually used by kernel internally.
* Portable code should be using interfaces such as ioremp, dma_map_single, etc.
*/
unsigned long phys_to_dma_offset;
EXPORT_SYMBOL(phys_to_dma_offset);
/*
*
* IO Resource Definition
*
*/
struct resource asic_resource = {
.name = "ASIC Resource",
.start = 0,
.end = ASIC_IO_SIZE,
.flags = IORESOURCE_MEM,
};
/*
* Allow override of bootloader-specified model
* Returns zero on success, a negative errno value on failure. This parameter
* allows overriding of the bootloader-specified model.
*/
static char __initdata cmdline[COMMAND_LINE_SIZE];
#define FORCEFAMILY_PARAM "forcefamily"
/*
* check_forcefamily - check for, and parse, forcefamily command line parameter
* @forced_family: Pointer to two-character array in which to store the
* value of the forcedfamily parameter, if any.
*/
static __init int check_forcefamily(unsigned char forced_family[2])
{
const char *p;
forced_family[0] = '\0';
forced_family[1] = '\0';
/* Check the command line for a forcefamily directive */
strncpy(cmdline, arcs_cmdline, COMMAND_LINE_SIZE - 1);
p = strstr(cmdline, FORCEFAMILY_PARAM);
if (p && (p != cmdline) && (*(p - 1) != ' '))
p = strstr(p, " " FORCEFAMILY_PARAM "=");
if (p) {
p += strlen(FORCEFAMILY_PARAM "=");
if (*p == '\0' || *(p + 1) == '\0' ||
(*(p + 2) != '\0' && *(p + 2) != ' '))
pr_err(FORCEFAMILY_PARAM " must be exactly two "
"characters long, ignoring value\n");
else {
forced_family[0] = *p;
forced_family[1] = *(p + 1);
}
}
return 0;
}
/*
* platform_set_family - determine major platform family type.
*
* Returns family type; -1 if none
* Returns the family type; -1 if none
*
*/
static __init noinline void platform_set_family(void)
{
unsigned char forced_family[2];
unsigned short bootldr_family;
if (check_forcefamily(forced_family) == 0)
bootldr_family = BOOTLDRFAMILY(forced_family[0],
forced_family[1]);
else {
#ifdef CONFIG_BOOTLOADER_DRIVER
bootldr_family = (unsigned short) kbldr_GetSWFamily();
#else
#if defined(CONFIG_BOOTLOADER_FAMILY)
bootldr_family = (unsigned short) BOOTLDRFAMILY(
CONFIG_BOOTLOADER_FAMILY[0],
CONFIG_BOOTLOADER_FAMILY[1]);
#else
#error "Unknown Bootloader Family"
#endif
#endif
}
pr_info("Bootloader Family = 0x%04X\n", bootldr_family);
switch (bootldr_family) {
case BOOTLDRFAMILY('R', '1'):
platform_family = FAMILY_1500;
break;
case BOOTLDRFAMILY('4', '4'):
platform_family = FAMILY_4500;
break;
case BOOTLDRFAMILY('4', '6'):
platform_family = FAMILY_4600;
break;
case BOOTLDRFAMILY('A', '1'):
platform_family = FAMILY_4600VZA;
break;
case BOOTLDRFAMILY('8', '5'):
platform_family = FAMILY_8500;
break;
case BOOTLDRFAMILY('R', '2'):
platform_family = FAMILY_8500RNG;
break;
case BOOTLDRFAMILY('8', '6'):
platform_family = FAMILY_8600;
break;
case BOOTLDRFAMILY('B', '1'):
platform_family = FAMILY_8600VZB;
break;
case BOOTLDRFAMILY('E', '1'):
platform_family = FAMILY_1500VZE;
break;
case BOOTLDRFAMILY('F', '1'):
platform_family = FAMILY_1500VZF;
break;
case BOOTLDRFAMILY('8', '7'):
platform_family = FAMILY_8700;
break;
default:
platform_family = -1;
}
}
unsigned int platform_get_family(void)
{
return platform_family;
}
EXPORT_SYMBOL(platform_get_family);
/*
* platform_get_asic - determine the ASIC type.
*
* Returns the ASIC type, or ASIC_UNKNOWN if unknown
*
*/
enum asic_type platform_get_asic(void)
{
return asic;
}
EXPORT_SYMBOL(platform_get_asic);
/*
* set_register_map - set ASIC register configuration
* @phys_base: Physical address of the base of the ASIC registers
* @map: Description of key ASIC registers
*/
static void __init set_register_map(unsigned long phys_base,
const struct register_map *map)
{
asic_phy_base = phys_base;
_asic_register_map = *map;
register_map_virtualize(&_asic_register_map);
asic_base = (unsigned long)ioremap_nocache(phys_base, ASIC_IO_SIZE);
}
/**
* configure_platform - configuration based on platform type.
*/
void __init configure_platform(void)
{
platform_set_family();
switch (platform_family) {
case FAMILY_1500:
case FAMILY_1500VZE:
case FAMILY_1500VZF:
platform_features = FFS_CAPABLE;
asic = ASIC_CALLIOPE;
set_register_map(CALLIOPE_IO_BASE, &calliope_register_map);
if (platform_family == FAMILY_1500VZE) {
gp_resources = non_dvr_vze_calliope_resources;
pr_info("Platform: 1500/Vz Class E - "
"CALLIOPE, NON_DVR_CAPABLE\n");
} else if (platform_family == FAMILY_1500VZF) {
gp_resources = non_dvr_vzf_calliope_resources;
pr_info("Platform: 1500/Vz Class F - "
"CALLIOPE, NON_DVR_CAPABLE\n");
} else {
gp_resources = non_dvr_calliope_resources;
pr_info("Platform: 1500/RNG100 - CALLIOPE, "
"NON_DVR_CAPABLE\n");
}
break;
case FAMILY_4500:
platform_features = FFS_CAPABLE | PCIE_CAPABLE |
DISPLAY_CAPABLE;
asic = ASIC_ZEUS;
set_register_map(ZEUS_IO_BASE, &zeus_register_map);
gp_resources = non_dvr_zeus_resources;
pr_info("Platform: 4500 - ZEUS, NON_DVR_CAPABLE\n");
break;
case FAMILY_4600:
{
unsigned int chipversion = 0;
/* The settop has PCIE but it isn't used, so don't advertise
* it*/
platform_features = FFS_CAPABLE | DISPLAY_CAPABLE;
/* Cronus and Cronus Lite have the same register map */
set_register_map(CRONUS_IO_BASE, &cronus_register_map);
/* ASIC version will determine if this is a real CronusLite or
* Castrati(Cronus) */
chipversion = asic_read(chipver3) << 24;
chipversion |= asic_read(chipver2) << 16;
chipversion |= asic_read(chipver1) << 8;
chipversion |= asic_read(chipver0);
if ((chipversion == CRONUS_10) || (chipversion == CRONUS_11))
asic = ASIC_CRONUS;
else
asic = ASIC_CRONUSLITE;
gp_resources = non_dvr_cronuslite_resources;
pr_info("Platform: 4600 - %s, NON_DVR_CAPABLE, "
"chipversion=0x%08X\n",
(asic == ASIC_CRONUS) ? "CRONUS" : "CRONUS LITE",
chipversion);
break;
}
case FAMILY_4600VZA:
platform_features = FFS_CAPABLE | DISPLAY_CAPABLE;
asic = ASIC_CRONUS;
set_register_map(CRONUS_IO_BASE, &cronus_register_map);
gp_resources = non_dvr_cronus_resources;
pr_info("Platform: Vz Class A - CRONUS, NON_DVR_CAPABLE\n");
break;
case FAMILY_8500:
case FAMILY_8500RNG:
platform_features = DVR_CAPABLE | PCIE_CAPABLE |
DISPLAY_CAPABLE;
asic = ASIC_ZEUS;
set_register_map(ZEUS_IO_BASE, &zeus_register_map);
gp_resources = dvr_zeus_resources;
pr_info("Platform: 8500/RNG200 - ZEUS, DVR_CAPABLE\n");
break;
case FAMILY_8600:
case FAMILY_8600VZB:
platform_features = DVR_CAPABLE | PCIE_CAPABLE |
DISPLAY_CAPABLE;
asic = ASIC_CRONUS;
set_register_map(CRONUS_IO_BASE, &cronus_register_map);
gp_resources = dvr_cronus_resources;
pr_info("Platform: 8600/Vz Class B - CRONUS, "
"DVR_CAPABLE\n");
break;
case FAMILY_8700:
platform_features = FFS_CAPABLE | PCIE_CAPABLE;
asic = ASIC_GAIA;
set_register_map(GAIA_IO_BASE, &gaia_register_map);
gp_resources = dvr_gaia_resources;
pr_info("Platform: 8700 - GAIA, DVR_CAPABLE\n");
break;
default:
pr_crit("Platform: UNKNOWN PLATFORM\n");
break;
}
switch (asic) {
case ASIC_ZEUS:
phys_to_dma_offset = 0x30000000;
break;
case ASIC_CALLIOPE:
phys_to_dma_offset = 0x10000000;
break;
case ASIC_CRONUSLITE:
/* Fall through */
case ASIC_CRONUS:
/*
* TODO: We suppose 0x10000000 aliases into 0x20000000-
* 0x2XXXXXXX. If 0x10000000 aliases into 0x60000000-
* 0x6XXXXXXX, the offset should be 0x50000000, not 0x10000000.
*/
phys_to_dma_offset = 0x10000000;
break;
default:
phys_to_dma_offset = 0x00000000;
break;
}
}
/*
* RESOURCE ALLOCATION
*
*/
/*
* Allocates/reserves the Platform memory resources early in the boot process.
* This ignores any resources that are designated IORESOURCE_IO
*/
void __init platform_alloc_bootmem(void)
{
int i;
int total = 0;
/* Get persistent memory data from command line before allocating
* resources. This need to happen before normal command line parsing
* has been done */
pmem_setup_resource();
/* Loop through looking for resources that want a particular address */
for (i = 0; gp_resources[i].flags != 0; i++) {
int size = gp_resources[i].end - gp_resources[i].start + 1;
if ((gp_resources[i].start != 0) &&
((gp_resources[i].flags & IORESOURCE_MEM) != 0)) {
reserve_bootmem(dma_to_phys(gp_resources[i].start),
size, 0);
total += gp_resources[i].end -
gp_resources[i].start + 1;
pr_info("reserve resource %s at %08x (%u bytes)\n",
gp_resources[i].name, gp_resources[i].start,
gp_resources[i].end -
gp_resources[i].start + 1);
}
}
/* Loop through assigning addresses for those that are left */
for (i = 0; gp_resources[i].flags != 0; i++) {
int size = gp_resources[i].end - gp_resources[i].start + 1;
if ((gp_resources[i].start == 0) &&
((gp_resources[i].flags & IORESOURCE_MEM) != 0)) {
void *mem = alloc_bootmem_pages(size);
if (mem == NULL)
pr_err("Unable to allocate bootmem pages "
"for %s\n", gp_resources[i].name);
else {
gp_resources[i].start =
phys_to_dma(virt_to_phys(mem));
gp_resources[i].end =
gp_resources[i].start + size - 1;
total += size;
pr_info("allocate resource %s at %08x "
"(%u bytes)\n",
gp_resources[i].name,
gp_resources[i].start, size);
}
}
}
pr_info("Total Platform driver memory allocation: 0x%08x\n", total);
/* indicate resources that are platform I/O related */
for (i = 0; gp_resources[i].flags != 0; i++) {
if ((gp_resources[i].start != 0) &&
((gp_resources[i].flags & IORESOURCE_IO) != 0)) {
pr_info("reserved platform resource %s at %08x\n",
gp_resources[i].name, gp_resources[i].start);
}
}
}
/*
*
* PERSISTENT MEMORY (PMEM) CONFIGURATION
*
*/
static unsigned long pmemaddr __initdata;
static int __init early_param_pmemaddr(char *p)
{
pmemaddr = (unsigned long)simple_strtoul(p, NULL, 0);
return 0;
}
early_param("pmemaddr", early_param_pmemaddr);
static long pmemlen __initdata;
static int __init early_param_pmemlen(char *p)
{
/* TODO: we can use this code when and if the bootloader ever changes this */
#if 0
pmemlen = (unsigned long)simple_strtoul(p, NULL, 0);
#else
pmemlen = 0x20000;
#endif
return 0;
}
early_param("pmemlen", early_param_pmemlen);
/*
* Set up persistent memory. If we were given values, we patch the array of
* resources. Otherwise, persistent memory may be allocated anywhere at all.
*/
static void __init pmem_setup_resource(void)
{
struct resource *resource;
resource = asic_resource_get("DiagPersistentMemory");
if (resource && pmemaddr && pmemlen) {
/* The address provided by bootloader is in kseg0. Convert to
* a bus address. */
resource->start = phys_to_dma(pmemaddr - 0x80000000);
resource->end = resource->start + pmemlen - 1;
pr_info("persistent memory: start=0x%x end=0x%x\n",
resource->start, resource->end);
}
}
/*
*
* RESOURCE ACCESS FUNCTIONS
*
*/
/**
* asic_resource_get - retrieves parameters for a platform resource.
* @name: string to match resource
*
* Returns a pointer to a struct resource corresponding to the given name.
*
* CANNOT BE NAMED platform_resource_get, which would be the obvious choice,
* as this function name is already declared
*/
struct resource *asic_resource_get(const char *name)
{
int i;
for (i = 0; gp_resources[i].flags != 0; i++) {
if (strcmp(gp_resources[i].name, name) == 0)
return &gp_resources[i];
}
return NULL;
}
EXPORT_SYMBOL(asic_resource_get);
/**
* platform_release_memory - release pre-allocated memory
* @ptr: pointer to memory to release
* @size: size of resource
*
* This must only be called for memory allocated or reserved via the boot
* memory allocator.
*/
void platform_release_memory(void *ptr, int size)
{
unsigned long addr;
unsigned long end;
addr = ((unsigned long)ptr + (PAGE_SIZE - 1)) & PAGE_MASK;
end = ((unsigned long)ptr + size) & PAGE_MASK;
for (; addr < end; addr += PAGE_SIZE) {
ClearPageReserved(virt_to_page(__va(addr)));
init_page_count(virt_to_page(__va(addr)));
free_page((unsigned long)__va(addr));
}
}
EXPORT_SYMBOL(platform_release_memory);
/*
*
* FEATURE AVAILABILITY FUNCTIONS
*
*/
int platform_supports_dvr(void)
{
return (platform_features & DVR_CAPABLE) != 0;
}
int platform_supports_ffs(void)
{
return (platform_features & FFS_CAPABLE) != 0;
}
int platform_supports_pcie(void)
{
return (platform_features & PCIE_CAPABLE) != 0;
}
int platform_supports_display(void)
{
return (platform_features & DISPLAY_CAPABLE) != 0;
}