diff options
Diffstat (limited to 'arch/ppc/syslib/cpm2_common.c')
| -rw-r--r-- | arch/ppc/syslib/cpm2_common.c | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/arch/ppc/syslib/cpm2_common.c b/arch/ppc/syslib/cpm2_common.c deleted file mode 100644 index 6cd859d7721..00000000000 --- a/arch/ppc/syslib/cpm2_common.c +++ /dev/null @@ -1,196 +0,0 @@ -/* - * General Purpose functions for the global management of the - * 8260 Communication Processor Module. - * Copyright (c) 1999 Dan Malek (dmalek@jlc.net) - * Copyright (c) 2000 MontaVista Software, Inc (source@mvista.com) - * 2.3.99 Updates - * - * In addition to the individual control of the communication - * channels, there are a few functions that globally affect the - * communication processor. - * - * Buffer descriptors must be allocated from the dual ported memory - * space. The allocator for that is here. When the communication - * process is reset, we reclaim the memory available. There is - * currently no deallocator for this memory. - */ -#include <linux/errno.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/param.h> -#include <linux/string.h> -#include <linux/mm.h> -#include <linux/interrupt.h> -#include <linux/module.h> -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/mpc8260.h> -#include <asm/page.h> -#include <asm/pgtable.h> -#include <asm/cpm2.h> -#include <asm/rheap.h> - -static void cpm2_dpinit(void); -cpm_cpm2_t *cpmp; /* Pointer to comm processor space */ - -/* We allocate this here because it is used almost exclusively for - * the communication processor devices. - */ -cpm2_map_t *cpm2_immr; - -#define CPM_MAP_SIZE (0x40000) /* 256k - the PQ3 reserve this amount - of space for CPM as it is larger - than on PQ2 */ - -void -cpm2_reset(void) -{ - cpm2_immr = (cpm2_map_t *)ioremap(CPM_MAP_ADDR, CPM_MAP_SIZE); - - /* Reclaim the DP memory for our use. - */ - cpm2_dpinit(); - - /* Tell everyone where the comm processor resides. - */ - cpmp = &cpm2_immr->im_cpm; -} - -/* Set a baud rate generator. This needs lots of work. There are - * eight BRGs, which can be connected to the CPM channels or output - * as clocks. The BRGs are in two different block of internal - * memory mapped space. - * The baud rate clock is the system clock divided by something. - * It was set up long ago during the initial boot phase and is - * is given to us. - * Baud rate clocks are zero-based in the driver code (as that maps - * to port numbers). Documentation uses 1-based numbering. - */ -#define BRG_INT_CLK (((bd_t *)__res)->bi_brgfreq) -#define BRG_UART_CLK (BRG_INT_CLK/16) - -/* This function is used by UARTS, or anything else that uses a 16x - * oversampled clock. - */ -void -cpm_setbrg(uint brg, uint rate) -{ - volatile uint *bp; - - /* This is good enough to get SMCs running..... - */ - if (brg < 4) { - bp = (uint *)&cpm2_immr->im_brgc1; - } - else { - bp = (uint *)&cpm2_immr->im_brgc5; - brg -= 4; - } - bp += brg; - *bp = ((BRG_UART_CLK / rate) << 1) | CPM_BRG_EN; -} - -/* This function is used to set high speed synchronous baud rate - * clocks. - */ -void -cpm2_fastbrg(uint brg, uint rate, int div16) -{ - volatile uint *bp; - - if (brg < 4) { - bp = (uint *)&cpm2_immr->im_brgc1; - } - else { - bp = (uint *)&cpm2_immr->im_brgc5; - brg -= 4; - } - bp += brg; - *bp = ((BRG_INT_CLK / rate) << 1) | CPM_BRG_EN; - if (div16) - *bp |= CPM_BRG_DIV16; -} - -/* - * dpalloc / dpfree bits. - */ -static spinlock_t cpm_dpmem_lock; -/* 16 blocks should be enough to satisfy all requests - * until the memory subsystem goes up... */ -static rh_block_t cpm_boot_dpmem_rh_block[16]; -static rh_info_t cpm_dpmem_info; - -static void cpm2_dpinit(void) -{ - spin_lock_init(&cpm_dpmem_lock); - - /* initialize the info header */ - rh_init(&cpm_dpmem_info, 1, - sizeof(cpm_boot_dpmem_rh_block) / - sizeof(cpm_boot_dpmem_rh_block[0]), - cpm_boot_dpmem_rh_block); - - /* Attach the usable dpmem area */ - /* XXX: This is actually crap. CPM_DATAONLY_BASE and - * CPM_DATAONLY_SIZE is only a subset of the available dpram. It - * varies with the processor and the microcode patches activated. - * But the following should be at least safe. - */ - rh_attach_region(&cpm_dpmem_info, CPM_DATAONLY_BASE, CPM_DATAONLY_SIZE); -} - -/* This function returns an index into the DPRAM area. - */ -unsigned long cpm_dpalloc(uint size, uint align) -{ - unsigned long start; - unsigned long flags; - - spin_lock_irqsave(&cpm_dpmem_lock, flags); - cpm_dpmem_info.alignment = align; - start = rh_alloc(&cpm_dpmem_info, size, "commproc"); - spin_unlock_irqrestore(&cpm_dpmem_lock, flags); - - return start; -} -EXPORT_SYMBOL(cpm_dpalloc); - -int cpm_dpfree(unsigned long offset) -{ - int ret; - unsigned long flags; - - spin_lock_irqsave(&cpm_dpmem_lock, flags); - ret = rh_free(&cpm_dpmem_info, offset); - spin_unlock_irqrestore(&cpm_dpmem_lock, flags); - - return ret; -} -EXPORT_SYMBOL(cpm_dpfree); - -/* not sure if this is ever needed */ -unsigned long cpm_dpalloc_fixed(unsigned long offset, uint size, uint align) -{ - unsigned long start; - unsigned long flags; - - spin_lock_irqsave(&cpm_dpmem_lock, flags); - cpm_dpmem_info.alignment = align; - start = rh_alloc_fixed(&cpm_dpmem_info, offset, size, "commproc"); - spin_unlock_irqrestore(&cpm_dpmem_lock, flags); - - return start; -} -EXPORT_SYMBOL(cpm_dpalloc_fixed); - -void cpm_dpdump(void) -{ - rh_dump(&cpm_dpmem_info); -} -EXPORT_SYMBOL(cpm_dpdump); - -void *cpm_dpram_addr(unsigned long offset) -{ - return (void *)&cpm2_immr->im_dprambase[offset]; -} -EXPORT_SYMBOL(cpm_dpram_addr); |