patch-2.4.26 linux-2.4.26/arch/ppc/8260_io/commproc.c

• Lines: 180
• Date: 1969-12-31 16:00:00.000000000 -0800
• Orig file: linux-2.4.25/arch/ppc/8260_io/commproc.c
• Orig date: 2003-06-13 07:51:31.000000000 -0700

diff -urN linux-2.4.25/arch/ppc/8260_io/commproc.c linux-2.4.26/arch/ppc/8260_io/commproc.c
@@ -1,179 +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/bootmem.h>
-#include <asm/irq.h>
-#include <asm/mpc8260.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/immap_8260.h>
-#include <asm/cpm_8260.h>
-
-static	uint	dp_alloc_base;	/* Starting offset in DP ram */
-static	uint	dp_alloc_top;	/* Max offset + 1 */
-static	uint	host_buffer;	/* One page of host buffer */
-static	uint	host_end;	/* end + 1 */
-cpm8260_t	*cpmp;		/* Pointer to comm processor space */
-
-/* We allocate this here because it is used almost exclusively for
- * the communication processor devices.
- */
-immap_t		*immr;
-
-void
-m8260_cpm_reset(void)
-{
-	volatile immap_t	 *imp;
-	volatile cpm8260_t	*commproc;
-	uint			vpgaddr;
-
-	immr = imp = (volatile immap_t *)IMAP_ADDR;
-	commproc = &imp->im_cpm;
-
-	/* Reclaim the DP memory for our use.
-	*/
-	dp_alloc_base = CPM_DATAONLY_BASE;
-	dp_alloc_top = dp_alloc_base + CPM_DATAONLY_SIZE;
-
-	/* Set the host page for allocation.
-	*/
-	host_buffer =
-		(uint) alloc_bootmem_pages(PAGE_SIZE * NUM_CPM_HOST_PAGES);
-	host_end = host_buffer + (PAGE_SIZE * NUM_CPM_HOST_PAGES);
-
-	vpgaddr = host_buffer;
-
-	/* Tell everyone where the comm processor resides.
-	*/
-	cpmp = (cpm8260_t *)commproc;
-}
-
-/* Allocate some memory from the dual ported ram.
- * To help protocols with object alignment restrictions, we do that
- * if they ask.
- */
-uint
-m8260_cpm_dpalloc(uint size, uint align)
-{
-	uint	retloc;
-	uint	align_mask, off;
-	uint	savebase;
-
-	align_mask = align - 1;
-	savebase = dp_alloc_base;
-
-	if ((off = (dp_alloc_base & align_mask)) != 0)
-		dp_alloc_base += (align - off);
-
-	if ((dp_alloc_base + size) >= dp_alloc_top) {
-		dp_alloc_base = savebase;
-		return(CPM_DP_NOSPACE);
-	}
-
-	retloc = dp_alloc_base;
-	dp_alloc_base += size;
-
-	return(retloc);
-}
-
-/* We also own one page of host buffer space for the allocation of
- * UART "fifos" and the like.
- */
-uint
-m8260_cpm_hostalloc(uint size, uint align)
-{
-	uint	retloc;
-	uint	align_mask, off;
-	uint	savebase;
-
-	align_mask = align - 1;
-	savebase = host_buffer;
-
-	if ((off = (host_buffer & align_mask)) != 0)
-		host_buffer += (align - off);
-
-	if ((host_buffer + size) >= host_end) {
-		host_buffer = savebase;
-		return(0);
-	}
-
-	retloc = host_buffer;
-	host_buffer += size;
-
-	return(retloc);
-}
-
-/* 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
-m8260_cpm_setbrg(uint brg, uint rate)
-{
-	volatile uint	*bp;
-
-	/* This is good enough to get SMCs running.....
-	*/
-	if (brg < 4) {
-		bp = (uint *)&immr->im_brgc1;
-	}
-	else {
-		bp = (uint *)&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
-m8260_cpm_fastbrg(uint brg, uint rate, int div16)
-{
-	volatile uint	*bp;
-
-	if (brg < 4) {
-		bp = (uint *)&immr->im_brgc1;
-	}
-	else {
-		bp = (uint *)&immr->im_brgc5;
-		brg -= 4;
-	}
-	bp += brg;
-	*bp = ((BRG_INT_CLK / rate) << 1) | CPM_BRG_EN;
-	if (div16)
-		*bp |= CPM_BRG_DIV16;
-}