Blackfin arch: fix bugs and unify BFIN_KERNEL_CLOCK option

 - remove duplicated code and headers
 - add option allowing arbitrary SDRAM/DDR Timing parameters.
 - mark automatically calculated timings as EXPERIMENTAL
 - fix comment header block

Related to BUGs:
 - kernel boot up fails with CONFIG_BFIN_KERNEL_CLOCK item on.
 - kernel does not boot if re-program clocks

[ Mike Frysinger <vapier.adi@gmail.com>
 - fix comment header
 - mark do_sync static
 - document the DMA shutdown
 - simplify SIC_IWR handling
 - fix ANOMALY_05000265 handling to work as intended ]

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

1 files changed, 0 insertions, 137 deletions

diff --git a/arch/blackfin/mach-bf538/head.S b/arch/blackfin/mach-bf538/head.S
deleted file mode 100644
index 39013ec9700..00000000000
--- a/arch/blackfin/mach-bf538/head.S
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
- * File:         arch/blackfin/mach-bf538/head.S
- * Based on:
- * Author:       Jeff Dionne <jeff@uclinux.org> COPYRIGHT 1998 D. Jeff Dionne
- *
- * Created:      1998
- * Description:  bf533 startup file
- *
- * Modified:
- *               Copyright 2004-2006 Analog Devices Inc.
- *
- * Bugs:         Enter bugs at http://blackfin.uclinux.org/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#include <linux/linkage.h>
-#include <linux/init.h>
-#include <asm/blackfin.h>
-#ifdef CONFIG_BFIN_KERNEL_CLOCK
-#include <asm/mach-common/clocks.h>
-#include <asm/mach/mem_init.h>
-#endif
-
-.section .l1.text
-#ifdef CONFIG_BFIN_KERNEL_CLOCK
-ENTRY(_start_dma_code)
-	p0.h = hi(SIC_IWR0);
-	p0.l = lo(SIC_IWR0);
-	r0.l = 0x1;
-	r0.h = 0x0;
-	[p0] = r0;
-	SSYNC;
-
-	/*
-	 *  Set PLL_CTL
-	 *   - [14:09] = MSEL[5:0] : CLKIN / VCO multiplication factors
-	 *   - [8]     = BYPASS    : BYPASS the PLL, run CLKIN into CCLK/SCLK
-	 *   - [7]     = output delay (add 200ps of delay to mem signals)
-	 *   - [6]     = input delay (add 200ps of input delay to mem signals)
-	 *   - [5]     = PDWN      : 1=All Clocks off
-	 *   - [3]     = STOPCK    : 1=Core Clock off
-	 *   - [1]     = PLL_OFF   : 1=Disable Power to PLL
-	 *   - [0]     = DF        : 1=Pass CLKIN/2 to PLL / 0=Pass CLKIN to PLL
-	 *   all other bits set to zero
-	 */
-
-	p0.h = hi(PLL_LOCKCNT);
-	p0.l = lo(PLL_LOCKCNT);
-	r0 = 0x300(Z);
-	w[p0] = r0.l;
-	ssync;
-
-	P2.H = hi(EBIU_SDGCTL);
-	P2.L = lo(EBIU_SDGCTL);
-	R0 = [P2];
-	BITSET (R0, 24);
-	[P2] = R0;
-	SSYNC;
-
-	r0 = CONFIG_VCO_MULT & 63;       /* Load the VCO multiplier         */
-	r0 = r0 << 9;                    /* Shift it over,                  */
-	r1 = CLKIN_HALF;                 /* Do we need to divide CLKIN by 2?*/
-	r0 = r1 | r0;
-	r1 = PLL_BYPASS;                 /* Bypass the PLL?                 */
-	r1 = r1 << 8;                    /* Shift it over                   */
-	r0 = r1 | r0;                    /* add them all together           */
-#ifdef ANOMALY_05000265
-	BITSET(r0, 15);                  /* Add 250 mV of hysteresis to SPORT input pins */
-#endif
-
-	p0.h = hi(PLL_CTL);
-	p0.l = lo(PLL_CTL);              /* Load the address                */
-	cli r2;                          /* Disable interrupts              */
-	ssync;
-	w[p0] = r0.l;                    /* Set the value                   */
-	idle;                            /* Wait for the PLL to stablize    */
-	sti r2;                          /* Enable interrupts               */
-
-.Lcheck_again:
-	p0.h = hi(PLL_STAT);
-	p0.l = lo(PLL_STAT);
-	R0 = W[P0](Z);
-	CC = BITTST(R0,5);
-	if ! CC jump .Lcheck_again;
-
-	/* Configure SCLK & CCLK Dividers */
-	r0 = (CONFIG_CCLK_ACT_DIV | CONFIG_SCLK_DIV);
-	p0.h = hi(PLL_DIV);
-	p0.l = lo(PLL_DIV);
-	w[p0] = r0.l;
-	ssync;
-
-	p0.l = lo(EBIU_SDRRC);
-	p0.h = hi(EBIU_SDRRC);
-	r0 = mem_SDRRC;
-	w[p0] = r0.l;
-	ssync;
-
-	P2.H = hi(EBIU_SDGCTL);
-	P2.L = lo(EBIU_SDGCTL);
-	R0 = [P2];
-	BITCLR (R0, 24);
-	p0.h = hi(EBIU_SDSTAT);
-	p0.l = lo(EBIU_SDSTAT);
-	r2.l = w[p0];
-	cc = bittst(r2,3);
-	if !cc jump .Lskip;
-	NOP;
-	BITSET (R0, 23);
-.Lskip:
-	[P2] = R0;
-	SSYNC;
-
-	R0.L = lo(mem_SDGCTL);
-	R0.H = hi(mem_SDGCTL);
-	R1 = [p2];
-	R1 = R1 | R0;
-	[P2] = R1;
-	SSYNC;
-
-	RTS;
-ENDPROC(_start_dma_code)
-#endif /* CONFIG_BFIN_KERNEL_CLOCK */