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Diffstat (limited to 'arch/arm/mach-ixp2000/include/mach/platform.h')
| -rw-r--r-- | arch/arm/mach-ixp2000/include/mach/platform.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp2000/include/mach/platform.h b/arch/arm/mach-ixp2000/include/mach/platform.h new file mode 100644 index 000000000000..42182c79ed90 --- /dev/null +++ b/arch/arm/mach-ixp2000/include/mach/platform.h @@ -0,0 +1,152 @@ +/* + * arch/arm/mach-ixp2000/include/mach/platform.h + * + * Various bits of code used by platform-level code. + * + * Author: Deepak Saxena <dsaxena@plexity.net> + * + * Copyright 2004 (c) MontaVista Software, Inc. + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + + +#ifndef __ASSEMBLY__ + +static inline unsigned long ixp2000_reg_read(volatile void *reg) +{ + return *((volatile unsigned long *)reg); +} + +static inline void ixp2000_reg_write(volatile void *reg, unsigned long val) +{ + *((volatile unsigned long *)reg) = val; +} + +/* + * On the IXP2400, we can't use XCB=000 due to chip bugs. We use + * XCB=101 instead, but that makes all I/O accesses bufferable. This + * is not a problem in general, but we do have to be slightly more + * careful because I/O writes are no longer automatically flushed out + * of the write buffer. + * + * In cases where we want to make sure that a write has been flushed + * out of the write buffer before we proceed, for example when masking + * a device interrupt before re-enabling IRQs in CPSR, we can use this + * function, ixp2000_reg_wrb, which performs a write, a readback, and + * issues a dummy instruction dependent on the value of the readback + * (mov rX, rX) to make sure that the readback has completed before we + * continue. + */ +static inline void ixp2000_reg_wrb(volatile void *reg, unsigned long val) +{ + unsigned long dummy; + + *((volatile unsigned long *)reg) = val; + + dummy = *((volatile unsigned long *)reg); + __asm__ __volatile__("mov %0, %0" : "+r" (dummy)); +} + +/* + * Boards may multiplex different devices on the 2nd channel of + * the slowport interface that each need different configuration + * settings. For example, the IXDP2400 uses channel 2 on the interface + * to access the CPLD, the switch fabric card, and the media card. Each + * one needs a different mode so drivers must save/restore the mode + * before and after each operation. + * + * acquire_slowport(&your_config); + * ... + * do slowport operations + * ... + * release_slowport(); + * + * Note that while you have the slowport, you are holding a spinlock, + * so your code should be written as if you explicitly acquired a lock. + * + * The configuration only affects device 2 on the slowport, so the + * MTD map driver does not acquire/release the slowport. + */ +struct slowport_cfg { + unsigned long CCR; /* Clock divide */ + unsigned long WTC; /* Write Timing Control */ + unsigned long RTC; /* Read Timing Control */ + unsigned long PCR; /* Protocol Control Register */ + unsigned long ADC; /* Address/Data Width Control */ +}; + + +void ixp2000_acquire_slowport(struct slowport_cfg *, struct slowport_cfg *); +void ixp2000_release_slowport(struct slowport_cfg *); + +/* + * IXP2400 A0/A1 and IXP2800 A0/A1/A2 have broken slowport that requires + * tweaking of addresses in the MTD driver. + */ +static inline unsigned ixp2000_has_broken_slowport(void) +{ + unsigned long id = *IXP2000_PRODUCT_ID; + unsigned long id_prod = id & (IXP2000_MAJ_PROD_TYPE_MASK | + IXP2000_MIN_PROD_TYPE_MASK); + return (((id_prod == + /* fixed in IXP2400-B0 */ + (IXP2000_MAJ_PROD_TYPE_IXP2000 | + IXP2000_MIN_PROD_TYPE_IXP2400)) && + ((id & IXP2000_MAJ_REV_MASK) == 0)) || + ((id_prod == + /* fixed in IXP2800-B0 */ + (IXP2000_MAJ_PROD_TYPE_IXP2000 | + IXP2000_MIN_PROD_TYPE_IXP2800)) && + ((id & IXP2000_MAJ_REV_MASK) == 0)) || + ((id_prod == + /* fixed in IXP2850-B0 */ + (IXP2000_MAJ_PROD_TYPE_IXP2000 | + IXP2000_MIN_PROD_TYPE_IXP2850)) && + ((id & IXP2000_MAJ_REV_MASK) == 0))); +} + +static inline unsigned int ixp2000_has_flash(void) +{ + return ((*IXP2000_STRAP_OPTIONS) & (CFG_BOOT_PROM)); +} + +static inline unsigned int ixp2000_is_pcimaster(void) +{ + return ((*IXP2000_STRAP_OPTIONS) & (CFG_PCI_BOOT_HOST)); +} + +void ixp2000_map_io(void); +void ixp2000_uart_init(void); +void ixp2000_init_irq(void); +void ixp2000_init_time(unsigned long); +unsigned long ixp2000_gettimeoffset(void); + +struct pci_sys_data; + +u32 *ixp2000_pci_config_addr(unsigned int bus, unsigned int devfn, int where); +void ixp2000_pci_preinit(void); +int ixp2000_pci_setup(int, struct pci_sys_data*); +struct pci_bus* ixp2000_pci_scan_bus(int, struct pci_sys_data*); +int ixp2000_pci_read_config(struct pci_bus*, unsigned int, int, int, u32 *); +int ixp2000_pci_write_config(struct pci_bus*, unsigned int, int, int, u32); + +/* + * Several of the IXP2000 systems have banked flash so we need to extend the + * flash_platform_data structure with some private pointers + */ +struct ixp2000_flash_data { + struct flash_platform_data *platform_data; + int nr_banks; + unsigned long (*bank_setup)(unsigned long); +}; + +struct ixp2000_i2c_pins { + unsigned long sda_pin; + unsigned long scl_pin; +}; + + +#endif /* !__ASSEMBLY__ */ |