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>

3 files changed, 0 insertions, 415 deletions

diff --git a/arch/blackfin/mach-bf548/Makefile b/arch/blackfin/mach-bf548/Makefile
index 68e5478e95a..56994b675f9 100644
--- a/arch/blackfin/mach-bf548/Makefile
+++ b/arch/blackfin/mach-bf548/Makefile
@@ -2,6 +2,4 @@
 # arch/blackfin/mach-bf537/Makefile
 #
 
-extra-y := head.o
-
 obj-y := ints-priority.o dma.o
diff --git a/arch/blackfin/mach-bf548/head.S b/arch/blackfin/mach-bf548/head.S
deleted file mode 100644
index 93b361dff27..00000000000
--- a/arch/blackfin/mach-bf548/head.S
+++ /dev/null
@@ -1,158 +0,0 @@
-/*
- * File:         arch/blackfin/mach-bf548/head.S
- * Based on:     arch/blackfin/mach-bf537/head.S
- * Author:       Jeff Dionne <jeff@uclinux.org> COPYRIGHT 1998 D. Jeff Dionne
- *
- * Created:      1998
- * Description:  Startup code for Blackfin BF548
- *
- * Modified:
- *               Copyright 2004-2007 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/clocks.h>
-#include <mach/mem_init.h>
-#endif
-
-.section .l1.text
-#ifdef CONFIG_BFIN_KERNEL_CLOCK
-ENTRY(_start_dma_code)
-
-	/* Enable PHY CLK buffer output */
-	p0.h = hi(VR_CTL);
-	p0.l = lo(VR_CTL);
-	r0.l = w[p0];
-	bitset(r0, 14);
-	w[p0] = r0.l;
-	ssync;
-
-	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;
-
-	/* enable self refresh via SRREQ */
-	P2.H = hi(EBIU_RSTCTL);
-	P2.L = lo(EBIU_RSTCTL);
-	R0 = [P2];
-	BITSET (R0, 3);
-	[P2] = R0;
-	SSYNC;
-
-	/* wait for SRACK bit to be set */
-.LSRR_MODE:
-	R0 = [P2];
-	CC = BITTST(R0, 4);
-	if !CC JUMP .LSRR_MODE;
-
-	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;
-
-	/* disable self refresh by clearing SRREQ */
-	P2.H = hi(EBIU_RSTCTL);
-	P2.L = lo(EBIU_RSTCTL);
-	R0 = [P2];
-	CC = BITTST(R0, 0);
-	if CC jump .Lskipddrrst;
-	BITSET (R0, 0);
-.Lskipddrrst:
-	BITCLR (R0, 3);
-	[P2] = R0;
-	SSYNC;
-
-	p0.l = lo(EBIU_DDRCTL0);
-	p0.h = hi(EBIU_DDRCTL0);
-	r0.l = lo(mem_DDRCTL0);
-	r0.h = hi(mem_DDRCTL0);
-	[p0] = r0;
-	ssync;
-
-	p0.l = lo(EBIU_DDRCTL1);
-	p0.h = hi(EBIU_DDRCTL1);
-	r0.l = lo(mem_DDRCTL1);
-	r0.h = hi(mem_DDRCTL1);
-	[p0] = r0;
-	ssync;
-
-	p0.l = lo(EBIU_DDRCTL2);
-	p0.h = hi(EBIU_DDRCTL2);
-	r0.l = lo(mem_DDRCTL2);
-	r0.h = hi(mem_DDRCTL2);
-	[p0] = r0;
-	ssync;
-
-	RTS;
-ENDPROC(_start_dma_code)
-#endif /* CONFIG_BFIN_KERNEL_CLOCK */
diff --git a/arch/blackfin/mach-bf548/include/mach/mem_init.h b/arch/blackfin/mach-bf548/include/mach/mem_init.h
deleted file mode 100644
index ab0b863eee6..00000000000
--- a/arch/blackfin/mach-bf548/include/mach/mem_init.h
+++ /dev/null
@@ -1,255 +0,0 @@
-/*
- * File:         include/asm-blackfin/mach-bf548/mem_init.h
- * Based on:
- * Author:
- *
- * Created:
- * Description:
- *
- * Rev:
- *
- * 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, 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; see the file COPYING.
- * If not, write to the Free Software Foundation,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-#define MIN_DDR_SCLK(x)	(x*(CONFIG_SCLK_HZ/1000/1000)/1000 + 1)
-#define MAX_DDR_SCLK(x)	(x*(CONFIG_SCLK_HZ/1000/1000)/1000)
-#define DDR_CLK_HZ(x)	(1000*1000*1000/x)
-
-#if (CONFIG_MEM_MT46V32M16_6T)
-#define DDR_SIZE	DEVSZ_512
-#define DDR_WIDTH	DEVWD_16
-#define DDR_MAX_tCK	13
-
-#define DDR_tRC		DDR_TRC(MIN_DDR_SCLK(60))
-#define DDR_tRAS	DDR_TRAS(MIN_DDR_SCLK(42))
-#define DDR_tRP		DDR_TRP(MIN_DDR_SCLK(15))
-#define DDR_tRFC	DDR_TRFC(MIN_DDR_SCLK(72))
-#define DDR_tREFI	DDR_TREFI(MAX_DDR_SCLK(7800))
-
-#define DDR_tRCD	DDR_TRCD(MIN_DDR_SCLK(15))
-#define DDR_tWTR	DDR_TWTR(1)
-#define DDR_tMRD	DDR_TMRD(MIN_DDR_SCLK(12))
-#define DDR_tWR		DDR_TWR(MIN_DDR_SCLK(15))
-#endif
-
-#if (CONFIG_MEM_MT46V32M16_5B)
-#define DDR_SIZE	DEVSZ_512
-#define DDR_WIDTH	DEVWD_16
-#define DDR_MAX_tCK	13
-
-#define DDR_tRC		DDR_TRC(MIN_DDR_SCLK(55))
-#define DDR_tRAS	DDR_TRAS(MIN_DDR_SCLK(40))
-#define DDR_tRP		DDR_TRP(MIN_DDR_SCLK(15))
-#define DDR_tRFC	DDR_TRFC(MIN_DDR_SCLK(70))
-#define DDR_tREFI	DDR_TREFI(MAX_DDR_SCLK(7800))
-
-#define DDR_tRCD	DDR_TRCD(MIN_DDR_SCLK(15))
-#define DDR_tWTR	DDR_TWTR(2)
-#define DDR_tMRD	DDR_TMRD(MIN_DDR_SCLK(10))
-#define DDR_tWR		DDR_TWR(MIN_DDR_SCLK(15))
-#endif
-
-#if (CONFIG_MEM_GENERIC_BOARD)
-#define DDR_SIZE	DEVSZ_512
-#define DDR_WIDTH	DEVWD_16
-#define DDR_MAX_tCK	13
-
-#define DDR_tRCD	DDR_TRCD(3)
-#define DDR_tWTR	DDR_TWTR(2)
-#define DDR_tWR		DDR_TWR(2)
-#define DDR_tMRD	DDR_TMRD(2)
-#define DDR_tRP		DDR_TRP(3)
-#define DDR_tRAS	DDR_TRAS(7)
-#define DDR_tRC		DDR_TRC(10)
-#define DDR_tRFC	DDR_TRFC(12)
-#define DDR_tREFI	DDR_TREFI(1288)
-#endif
-
-#if (CONFIG_SCLK_HZ < DDR_CLK_HZ(DDR_MAX_tCK))
-# error "CONFIG_SCLK_HZ is too small (<DDR_CLK_HZ(DDR_MAX_tCK) Hz)."
-#elif(CONFIG_SCLK_HZ <= 133333333)
-# define	DDR_CL		CL_2
-#else
-# error "CONFIG_SCLK_HZ is too large (>133333333 Hz)."
-#endif
-
-
-#define mem_DDRCTL0	(DDR_tRP | DDR_tRAS | DDR_tRC | DDR_tRFC | DDR_tREFI)
-#define mem_DDRCTL1	(DDR_DATWIDTH | EXTBANK_1 | DDR_SIZE | DDR_WIDTH | DDR_tWTR \
-			| DDR_tMRD | DDR_tWR | DDR_tRCD)
-#define mem_DDRCTL2	DDR_CL
-
-
-#if defined CONFIG_CLKIN_HALF
-#define CLKIN_HALF       1
-#else
-#define CLKIN_HALF       0
-#endif
-
-#if defined CONFIG_PLL_BYPASS
-#define PLL_BYPASS      1
-#else
-#define PLL_BYPASS       0
-#endif
-
-/***************************************Currently Not Being Used *********************************/
-#define flash_EBIU_AMBCTL_WAT  ((CONFIG_FLASH_SPEED_BWAT * 4) / (4000000000 / CONFIG_SCLK_HZ)) + 1
-#define flash_EBIU_AMBCTL_RAT  ((CONFIG_FLASH_SPEED_BRAT * 4) / (4000000000 / CONFIG_SCLK_HZ)) + 1
-#define flash_EBIU_AMBCTL_HT   ((CONFIG_FLASH_SPEED_BHT  * 4) / (4000000000 / CONFIG_SCLK_HZ))
-#define flash_EBIU_AMBCTL_ST   ((CONFIG_FLASH_SPEED_BST  * 4) / (4000000000 / CONFIG_SCLK_HZ)) + 1
-#define flash_EBIU_AMBCTL_TT   ((CONFIG_FLASH_SPEED_BTT  * 4) / (4000000000 / CONFIG_SCLK_HZ)) + 1
-
-#if (flash_EBIU_AMBCTL_TT > 3)
-#define flash_EBIU_AMBCTL0_TT   B0TT_4
-#endif
-#if (flash_EBIU_AMBCTL_TT == 3)
-#define flash_EBIU_AMBCTL0_TT   B0TT_3
-#endif
-#if (flash_EBIU_AMBCTL_TT == 2)
-#define flash_EBIU_AMBCTL0_TT   B0TT_2
-#endif
-#if (flash_EBIU_AMBCTL_TT < 2)
-#define flash_EBIU_AMBCTL0_TT   B0TT_1
-#endif
-
-#if (flash_EBIU_AMBCTL_ST > 3)
-#define flash_EBIU_AMBCTL0_ST   B0ST_4
-#endif
-#if (flash_EBIU_AMBCTL_ST == 3)
-#define flash_EBIU_AMBCTL0_ST   B0ST_3
-#endif
-#if (flash_EBIU_AMBCTL_ST == 2)
-#define flash_EBIU_AMBCTL0_ST   B0ST_2
-#endif
-#if (flash_EBIU_AMBCTL_ST < 2)
-#define flash_EBIU_AMBCTL0_ST   B0ST_1
-#endif
-
-#if (flash_EBIU_AMBCTL_HT > 2)
-#define flash_EBIU_AMBCTL0_HT   B0HT_3
-#endif
-#if (flash_EBIU_AMBCTL_HT == 2)
-#define flash_EBIU_AMBCTL0_HT   B0HT_2
-#endif
-#if (flash_EBIU_AMBCTL_HT == 1)
-#define flash_EBIU_AMBCTL0_HT   B0HT_1
-#endif
-#if (flash_EBIU_AMBCTL_HT == 0 && CONFIG_FLASH_SPEED_BHT == 0)
-#define flash_EBIU_AMBCTL0_HT   B0HT_0
-#endif
-#if (flash_EBIU_AMBCTL_HT == 0 && CONFIG_FLASH_SPEED_BHT != 0)
-#define flash_EBIU_AMBCTL0_HT   B0HT_1
-#endif
-
-#if (flash_EBIU_AMBCTL_WAT > 14)
-#define flash_EBIU_AMBCTL0_WAT  B0WAT_15
-#endif
-#if (flash_EBIU_AMBCTL_WAT == 14)
-#define flash_EBIU_AMBCTL0_WAT  B0WAT_14
-#endif
-#if (flash_EBIU_AMBCTL_WAT == 13)
-#define flash_EBIU_AMBCTL0_WAT  B0WAT_13
-#endif
-#if (flash_EBIU_AMBCTL_WAT == 12)
-#define flash_EBIU_AMBCTL0_WAT  B0WAT_12
-#endif
-#if (flash_EBIU_AMBCTL_WAT == 11)
-#define flash_EBIU_AMBCTL0_WAT  B0WAT_11
-#endif
-#if (flash_EBIU_AMBCTL_WAT == 10)
-#define flash_EBIU_AMBCTL0_WAT  B0WAT_10
-#endif
-#if (flash_EBIU_AMBCTL_WAT == 9)
-#define flash_EBIU_AMBCTL0_WAT  B0WAT_9
-#endif
-#if (flash_EBIU_AMBCTL_WAT == 8)
-#define flash_EBIU_AMBCTL0_WAT  B0WAT_8
-#endif
-#if (flash_EBIU_AMBCTL_WAT == 7)
-#define flash_EBIU_AMBCTL0_WAT  B0WAT_7
-#endif
-#if (flash_EBIU_AMBCTL_WAT == 6)
-#define flash_EBIU_AMBCTL0_WAT  B0WAT_6
-#endif
-#if (flash_EBIU_AMBCTL_WAT == 5)
-#define flash_EBIU_AMBCTL0_WAT  B0WAT_5
-#endif
-#if (flash_EBIU_AMBCTL_WAT == 4)
-#define flash_EBIU_AMBCTL0_WAT  B0WAT_4
-#endif
-#if (flash_EBIU_AMBCTL_WAT == 3)
-#define flash_EBIU_AMBCTL0_WAT  B0WAT_3
-#endif
-#if (flash_EBIU_AMBCTL_WAT == 2)
-#define flash_EBIU_AMBCTL0_WAT  B0WAT_2
-#endif
-#if (flash_EBIU_AMBCTL_WAT == 1)
-#define flash_EBIU_AMBCTL0_WAT  B0WAT_1
-#endif
-
-#if (flash_EBIU_AMBCTL_RAT > 14)
-#define flash_EBIU_AMBCTL0_RAT  B0RAT_15
-#endif
-#if (flash_EBIU_AMBCTL_RAT == 14)
-#define flash_EBIU_AMBCTL0_RAT  B0RAT_14
-#endif
-#if (flash_EBIU_AMBCTL_RAT == 13)
-#define flash_EBIU_AMBCTL0_RAT  B0RAT_13
-#endif
-#if (flash_EBIU_AMBCTL_RAT == 12)
-#define flash_EBIU_AMBCTL0_RAT  B0RAT_12
-#endif
-#if (flash_EBIU_AMBCTL_RAT == 11)
-#define flash_EBIU_AMBCTL0_RAT  B0RAT_11
-#endif
-#if (flash_EBIU_AMBCTL_RAT == 10)
-#define flash_EBIU_AMBCTL0_RAT  B0RAT_10
-#endif
-#if (flash_EBIU_AMBCTL_RAT == 9)
-#define flash_EBIU_AMBCTL0_RAT  B0RAT_9
-#endif
-#if (flash_EBIU_AMBCTL_RAT == 8)
-#define flash_EBIU_AMBCTL0_RAT  B0RAT_8
-#endif
-#if (flash_EBIU_AMBCTL_RAT == 7)
-#define flash_EBIU_AMBCTL0_RAT  B0RAT_7
-#endif
-#if (flash_EBIU_AMBCTL_RAT == 6)
-#define flash_EBIU_AMBCTL0_RAT  B0RAT_6
-#endif
-#if (flash_EBIU_AMBCTL_RAT == 5)
-#define flash_EBIU_AMBCTL0_RAT  B0RAT_5
-#endif
-#if (flash_EBIU_AMBCTL_RAT == 4)
-#define flash_EBIU_AMBCTL0_RAT  B0RAT_4
-#endif
-#if (flash_EBIU_AMBCTL_RAT == 3)
-#define flash_EBIU_AMBCTL0_RAT  B0RAT_3
-#endif
-#if (flash_EBIU_AMBCTL_RAT == 2)
-#define flash_EBIU_AMBCTL0_RAT  B0RAT_2
-#endif
-#if (flash_EBIU_AMBCTL_RAT == 1)
-#define flash_EBIU_AMBCTL0_RAT  B0RAT_1
-#endif
-
-#define flash_EBIU_AMBCTL0  \
-	(flash_EBIU_AMBCTL0_WAT | flash_EBIU_AMBCTL0_RAT | flash_EBIU_AMBCTL0_HT | \
-	 flash_EBIU_AMBCTL0_ST | flash_EBIU_AMBCTL0_TT | CONFIG_FLASH_SPEED_RDYEN)