154 lines
4.7 KiB
C
154 lines
4.7 KiB
C
/*
|
|
* 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);
|
|
void ixp2000_restart(char, const char *);
|
|
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__ */
|