149 lines
4.5 KiB
C
149 lines
4.5 KiB
C
/*
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* include/asm-arm/arch-ixp2000/platform.h
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*
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* Various bits of code used by platform-level code.
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*
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* Author: Deepak Saxena <dsaxena@plexity.net>
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*
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* Copyright 2004 (c) MontaVista Software, Inc.
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#ifndef __ASSEMBLY__
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/*
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* The IXP2400 B0 silicon contains an erratum (#66) that causes writes
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* to on-chip I/O register to not complete fully. What this means is
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* that if you have a write to on-chip I/O followed by a back-to-back
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* read or write, the first write will happen twice. OR...if it's
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* not a back-to-back transaction, the read or write will generate
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* incorrect data.
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*
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* The official work around for this is to set the on-chip I/O regions
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* as XCB=101 and then force a read-back from the register.
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*
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*/
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#if defined(CONFIG_ARCH_ENP2611) || defined(CONFIG_ARCH_IXDP2400) || defined(CONFIG_ARCH_IXDP2401)
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#include <asm/system.h> /* Pickup local_irq_ functions */
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static inline void ixp2000_reg_write(volatile unsigned long *reg, unsigned long val)
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{
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volatile unsigned long dummy;
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unsigned long flags;
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local_irq_save(flags);
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*reg = val;
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barrier();
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dummy = *reg;
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local_irq_restore(flags);
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}
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#else
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#define ixp2000_reg_write(reg, val) (*reg = val)
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#endif /* IXDP2400 || IXDP2401 */
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/*
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* Boards may multiplex different devices on the 2nd channel of
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* the slowport interface that each need different configuration
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* settings. For example, the IXDP2400 uses channel 2 on the interface
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* to access the CPLD, the switch fabric card, and the media card. Each
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* one needs a different mode so drivers must save/restore the mode
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* before and after each operation.
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*
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* acquire_slowport(&your_config);
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* ...
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* do slowport operations
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* ...
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* release_slowport();
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*
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* Note that while you have the slowport, you are holding a spinlock,
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* so your code should be written as if you explicitly acquired a lock.
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*
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* The configuration only affects device 2 on the slowport, so the
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* MTD map driver does not acquire/release the slowport.
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*/
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struct slowport_cfg {
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unsigned long CCR; /* Clock divide */
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unsigned long WTC; /* Write Timing Control */
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unsigned long RTC; /* Read Timing Control */
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unsigned long PCR; /* Protocol Control Register */
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unsigned long ADC; /* Address/Data Width Control */
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};
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void ixp2000_acquire_slowport(struct slowport_cfg *, struct slowport_cfg *);
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void ixp2000_release_slowport(struct slowport_cfg *);
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/*
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* IXP2400 A0/A1 and IXP2800 A0/A1/A2 have broken slowport that requires
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* tweaking of addresses in the MTD driver.
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*/
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static inline unsigned ixp2000_has_broken_slowport(void)
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{
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unsigned long id = *IXP2000_PROD_ID;
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unsigned long id_prod = id & (IXP2000_MAJ_PROD_TYPE_MASK |
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IXP2000_MIN_PROD_TYPE_MASK);
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return (((id_prod ==
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/* fixed in IXP2400-B0 */
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(IXP2000_MAJ_PROD_TYPE_IXP2000 |
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IXP2000_MIN_PROD_TYPE_IXP2400)) &&
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((id & IXP2000_MAJ_REV_MASK) == 0)) ||
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((id_prod ==
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/* fixed in IXP2800-B0 */
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(IXP2000_MAJ_PROD_TYPE_IXP2000 |
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IXP2000_MIN_PROD_TYPE_IXP2800)) &&
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((id & IXP2000_MAJ_REV_MASK) == 0)) ||
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((id_prod ==
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/* fixed in IXP2850-B0 */
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(IXP2000_MAJ_PROD_TYPE_IXP2000 |
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IXP2000_MIN_PROD_TYPE_IXP2850)) &&
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((id & IXP2000_MAJ_REV_MASK) == 0)));
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}
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static inline unsigned int ixp2000_has_flash(void)
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{
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return ((*IXP2000_STRAP_OPTIONS) & (CFG_BOOT_PROM));
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}
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static inline unsigned int ixp2000_is_pcimaster(void)
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{
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return ((*IXP2000_STRAP_OPTIONS) & (CFG_PCI_BOOT_HOST));
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}
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void ixp2000_map_io(void);
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void ixp2000_uart_init(void);
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void ixp2000_init_irq(void);
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void ixp2000_init_time(unsigned long);
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unsigned long ixp2000_gettimeoffset(void);
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struct pci_sys_data;
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u32 *ixp2000_pci_config_addr(unsigned int bus, unsigned int devfn, int where);
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void ixp2000_pci_preinit(void);
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int ixp2000_pci_setup(int, struct pci_sys_data*);
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struct pci_bus* ixp2000_pci_scan_bus(int, struct pci_sys_data*);
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int ixp2000_pci_read_config(struct pci_bus*, unsigned int, int, int, u32 *);
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int ixp2000_pci_write_config(struct pci_bus*, unsigned int, int, int, u32);
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/*
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* Several of the IXP2000 systems have banked flash so we need to extend the
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* flash_platform_data structure with some private pointers
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*/
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struct ixp2000_flash_data {
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struct flash_platform_data *platform_data;
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int nr_banks;
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unsigned long (*bank_setup)(unsigned long);
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};
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struct ixp2000_i2c_pins {
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unsigned long sda_pin;
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unsigned long scl_pin;
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};
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#endif /* !__ASSEMBLY__ */
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