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Diffstat (limited to 'include/asm-arm/arch-ixp2000/platform.h')
| -rw-r--r-- | include/asm-arm/arch-ixp2000/platform.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/include/asm-arm/arch-ixp2000/platform.h b/include/asm-arm/arch-ixp2000/platform.h new file mode 100644 index 00000000000..509e44d528d --- /dev/null +++ b/include/asm-arm/arch-ixp2000/platform.h @@ -0,0 +1,166 @@ +/* + * include/asm-arm/arch-ixp2000/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__ + +/* + * The IXP2400 B0 silicon contains an erratum (#66) that causes writes + * to on-chip I/O register to not complete fully. What this means is + * that if you have a write to on-chip I/O followed by a back-to-back + * read or write, the first write will happen twice. OR...if it's + * not a back-to-back transaction, the read or write will generate + * incorrect data. + * + * The official work around for this is to set the on-chip I/O regions + * as XCB=101 and then force a read-back from the register. + * + */ +#if defined(CONFIG_ARCH_ENP2611) || defined(CONFIG_ARCH_IXDP2400) || defined(CONFIG_ARCH_IXDP2401) + +#include <asm/system.h> /* Pickup local_irq_ functions */ + +static inline void ixp2000_reg_write(volatile unsigned long *reg, unsigned long val) +{ + volatile unsigned long dummy; + unsigned long flags; + + local_irq_save(flags); + *reg = val; + barrier(); + dummy = *reg; + local_irq_restore(flags); +} +#else +#define ixp2000_reg_write(reg, val) (*reg = val) +#endif /* IXDP2400 || IXDP2401 */ + +/* + * 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_PROD_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_init_irq(void); +void ixp2000_init_time(unsigned long); +unsigned long ixp2000_gettimeoffset(void); + +struct pci_sys_data; + +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); +}; + +/* + * GPIO helper functions + */ +#define GPIO_IN 0 +#define GPIO_OUT 1 + +extern void gpio_line_config(int line, int style); + +static inline int gpio_line_get(int line) +{ + return (((*IXP2000_GPIO_PLR) >> line) & 1); +} + +static inline void gpio_line_set(int line, int value) +{ + if (value) + ixp2000_reg_write(IXP2000_GPIO_POSR, (1 << line)); + else + ixp2000_reg_write(IXP2000_GPIO_POCR, (1 << line)); +} + +struct ixp2000_i2c_pins { + unsigned long sda_pin; + unsigned long scl_pin; +}; + +#endif /* !__ASSEMBLY__ */ |