diff options
Diffstat (limited to 'arch/mips/powertv/asic/asic_devices.c')
| -rw-r--r-- | arch/mips/powertv/asic/asic_devices.c | 787 |
1 files changed, 787 insertions, 0 deletions
diff --git a/arch/mips/powertv/asic/asic_devices.c b/arch/mips/powertv/asic/asic_devices.c new file mode 100644 index 00000000000..bae82880b6b --- /dev/null +++ b/arch/mips/powertv/asic/asic_devices.c @@ -0,0 +1,787 @@ +/* + * ASIC Device List Intialization + * + * Description: Defines the platform resources for the SA settop. + * + * 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 + * + * Author: Ken Eppinett + * David Schleef <ds@schleef.org> + * + * Description: Defines the platform resources for the SA settop. + * + * 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; +const struct register_map *register_map; +EXPORT_SYMBOL(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; +static bool usb_configured; + +/* + * 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_bus_offset; +EXPORT_SYMBOL(phys_to_bus_offset); + +/* + * + * IO Resource Definition + * + */ + +struct resource asic_resource = { + .name = "ASIC Resource", + .start = 0, + .end = ASIC_IO_SIZE, + .flags = IORESOURCE_MEM, +}; + +/* + * + * USB Host Resource Definition + * + */ + +static struct resource ehci_resources[] = { + { + .parent = &asic_resource, + .start = 0, + .end = 0xff, + .flags = IORESOURCE_MEM, + }, + { + .start = irq_usbehci, + .end = irq_usbehci, + .flags = IORESOURCE_IRQ, + }, +}; + +static u64 ehci_dmamask = DMA_BIT_MASK(32); + +static struct platform_device ehci_device = { + .name = "powertv-ehci", + .id = 0, + .num_resources = 2, + .resource = ehci_resources, + .dev = { + .dma_mask = &ehci_dmamask, + .coherent_dma_mask = DMA_BIT_MASK(32), + }, +}; + +static struct resource ohci_resources[] = { + { + .parent = &asic_resource, + .start = 0, + .end = 0xff, + .flags = IORESOURCE_MEM, + }, + { + .start = irq_usbohci, + .end = irq_usbohci, + .flags = IORESOURCE_IRQ, + }, +}; + +static u64 ohci_dmamask = DMA_BIT_MASK(32); + +static struct platform_device ohci_device = { + .name = "powertv-ohci", + .id = 0, + .num_resources = 2, + .resource = ohci_resources, + .dev = { + .dma_mask = &ohci_dmamask, + .coherent_dma_mask = DMA_BIT_MASK(32), + }, +}; + +static struct platform_device *platform_devices[] = { + &ehci_device, + &ohci_device, +}; + +/* + * + * Platform Configuration and Device Initialization + * + */ +static void __init fs_update(int pe, int md, int sdiv, int disable_div_by_3) +{ + int en_prg, byp, pwr, nsb, val; + int sout; + + sout = 1; + en_prg = 1; + byp = 0; + nsb = 1; + pwr = 1; + + val = ((sdiv << 29) | (md << 24) | (pe<<8) | (sout<<3) | (byp<<2) | + (nsb<<1) | (disable_div_by_3<<5)); + + asic_write(val, usb_fs); + asic_write(val | (en_prg<<4), usb_fs); + asic_write(val | (en_prg<<4) | pwr, usb_fs); +} + +/* + * Allow override of bootloader-specified model + */ +static char __initdata cmdline[COMMAND_LINE_SIZE]; + +#define FORCEFAMILY_PARAM "forcefamily" + +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) +{ +#define BOOTLDRFAMILY(byte1, byte0) (((byte1) << 8) | (byte0)) + + unsigned char forced_family[2]; + unsigned short bootldr_family; + + check_forcefamily(forced_family); + + if (forced_family[0] != '\0' && forced_family[1] != '\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; + default: + platform_family = -1; + } +} + +unsigned int platform_get_family(void) +{ + return platform_family; +} +EXPORT_SYMBOL(platform_get_family); + +/* + * \brief usb_eye_configure() for optimizing the USB eye on Calliope. + * + * \param unsigned int value saved to the register. + * + * \return none + * + */ +static void __init usb_eye_configure(unsigned int value) +{ + asic_write(asic_read(crt_spare) | value, crt_spare); +} + +/* + * platform_get_asic - determine the ASIC type. + * + * \param none + * + * \return ASIC type; ASIC_UNKNOWN if none + * + */ +enum asic_type platform_get_asic(void) +{ + return asic; +} +EXPORT_SYMBOL(platform_get_asic); + +/* + * platform_configure_usb - usb configuration based on platform type. + * @bcm1_usb2_ctl: value for the BCM1_USB2_CTL register, which is + * quirky + */ +static void __init platform_configure_usb(void) +{ + u32 bcm1_usb2_ctl; + + if (usb_configured) + return; + + switch (asic) { + case ASIC_ZEUS: + fs_update(0x0000, 0x11, 0x02, 0); + bcm1_usb2_ctl = 0x803; + break; + + case ASIC_CRONUS: + case ASIC_CRONUSLITE: + fs_update(0x0000, 0x11, 0x02, 0); + bcm1_usb2_ctl = 0x803; + break; + + case ASIC_CALLIOPE: + fs_update(0x0000, 0x11, 0x02, 1); + + switch (platform_family) { + case FAMILY_1500VZE: + break; + + case FAMILY_1500VZF: + usb_eye_configure(0x003c0000); + break; + + default: + usb_eye_configure(0x00300000); + break; + } + + bcm1_usb2_ctl = 0x803; + break; + + default: + pr_err("Unknown ASIC type: %d\n", asic); + break; + } + + /* turn on USB power */ + asic_write(0, usb2_strap); + /* Enable all OHCI interrupts */ + asic_write(bcm1_usb2_ctl, usb2_control); + /* USB2_STBUS_OBC store32/load32 */ + asic_write(3, usb2_stbus_obc); + /* USB2_STBUS_MESS_SIZE 2 packets */ + asic_write(1, usb2_stbus_mess_size); + /* USB2_STBUS_CHUNK_SIZE 2 packets */ + asic_write(1, usb2_stbus_chunk_size); + + usb_configured = true; +} + +/* + * Set up the USB EHCI interface + */ +void platform_configure_usb_ehci() +{ + platform_configure_usb(); +} + +/* + * Set up the USB OHCI interface + */ +void platform_configure_usb_ohci() +{ + platform_configure_usb(); +} + +/* + * Shut the USB EHCI interface down--currently a NOP + */ +void platform_unconfigure_usb_ehci() +{ +} + +/* + * Shut the USB OHCI interface down--currently a NOP + */ +void platform_unconfigure_usb_ohci() +{ +} + +/** + * 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; + asic_phy_base = CALLIOPE_IO_BASE; + register_map = &calliope_register_map; + asic_base = (unsigned long)ioremap_nocache(asic_phy_base, + ASIC_IO_SIZE); + + 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; + asic_phy_base = ZEUS_IO_BASE; + register_map = &zeus_register_map; + asic_base = (unsigned long)ioremap_nocache(asic_phy_base, + ASIC_IO_SIZE); + 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; + asic_phy_base = CRONUS_IO_BASE; /* same as Cronus */ + register_map = &cronus_register_map; /* same as Cronus */ + asic_base = (unsigned long)ioremap_nocache(asic_phy_base, + ASIC_IO_SIZE); + gp_resources = non_dvr_cronuslite_resources; + + /* 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; + + 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; + asic_phy_base = CRONUS_IO_BASE; + register_map = &cronus_register_map; + asic_base = (unsigned long)ioremap_nocache(asic_phy_base, + ASIC_IO_SIZE); + 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; + asic_phy_base = ZEUS_IO_BASE; + register_map = &zeus_register_map; + asic_base = (unsigned long)ioremap_nocache(asic_phy_base, + ASIC_IO_SIZE); + 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; + asic_phy_base = CRONUS_IO_BASE; + register_map = &cronus_register_map; + asic_base = (unsigned long)ioremap_nocache(asic_phy_base, + ASIC_IO_SIZE); + gp_resources = dvr_cronus_resources; + + pr_info("Platform: 8600/Vz Class B - CRONUS, " + "DVR_CAPABLE\n"); + break; + + default: + pr_crit("Platform: UNKNOWN PLATFORM\n"); + break; + } + + switch (asic) { + case ASIC_ZEUS: + phys_to_bus_offset = 0x30000000; + break; + case ASIC_CALLIOPE: + phys_to_bus_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_bus_offset = 0x10000000; + break; + default: + phys_to_bus_offset = 0x00000000; + break; + } +} + +/** + * platform_devices_init - sets up USB device resourse. + */ +static int __init platform_devices_init(void) +{ + pr_notice("%s: ----- Initializing USB resources -----\n", __func__); + + asic_resource.start = asic_phy_base; + asic_resource.end += asic_resource.start; + + ehci_resources[0].start = asic_reg_phys_addr(ehci_hcapbase); + ehci_resources[0].end += ehci_resources[0].start; + + ohci_resources[0].start = asic_reg_phys_addr(ohci_hc_revision); + ohci_resources[0].end += ohci_resources[0].start; + + set_io_port_base(0); + + platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices)); + + return 0; +} + +arch_initcall(platform_devices_init); + +/* + * + * BOOTMEM 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(bus_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_bus(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_bus(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; +} |