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, 362 insertions, 0 deletions

diff --git a/arch/blackfin/include/asm/mem_init.h b/arch/blackfin/include/asm/mem_init.h
new file mode 100644
index 00000000000..3cbc0f81ebf
--- /dev/null
+++ b/arch/blackfin/include/asm/mem_init.h
@@ -0,0 +1,362 @@
+/*
+ * arch/blackfin/include/asm/mem_init.h - reprogram clocks / memory
+ *
+ * Copyright 2004-2008 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#if defined(EBIU_SDGCTL)
+#if defined(CONFIG_MEM_MT48LC16M16A2TG_75) || \
+    defined(CONFIG_MEM_MT48LC64M4A2FB_7E) || \
+    defined(CONFIG_MEM_MT48LC16M8A2TG_75) || \
+    defined(CONFIG_MEM_GENERIC_BOARD) || \
+    defined(CONFIG_MEM_MT48LC32M8A2_75) || \
+    defined(CONFIG_MEM_MT48LC8M32B2B5_7) || \
+    defined(CONFIG_MEM_MT48LC32M16A2TG_75)
+#if (CONFIG_SCLK_HZ > 119402985)
+#define SDRAM_tRP       TRP_2
+#define SDRAM_tRP_num   2
+#define SDRAM_tRAS      TRAS_7
+#define SDRAM_tRAS_num  7
+#define SDRAM_tRCD      TRCD_2
+#define SDRAM_tWR       TWR_2
+#endif
+#if (CONFIG_SCLK_HZ > 104477612) && (CONFIG_SCLK_HZ <= 119402985)
+#define SDRAM_tRP       TRP_2
+#define SDRAM_tRP_num   2
+#define SDRAM_tRAS      TRAS_6
+#define SDRAM_tRAS_num  6
+#define SDRAM_tRCD      TRCD_2
+#define SDRAM_tWR       TWR_2
+#endif
+#if (CONFIG_SCLK_HZ > 89552239) && (CONFIG_SCLK_HZ <= 104477612)
+#define SDRAM_tRP       TRP_2
+#define SDRAM_tRP_num   2
+#define SDRAM_tRAS      TRAS_5
+#define SDRAM_tRAS_num  5
+#define SDRAM_tRCD      TRCD_2
+#define SDRAM_tWR       TWR_2
+#endif
+#if (CONFIG_SCLK_HZ > 74626866) && (CONFIG_SCLK_HZ <= 89552239)
+#define SDRAM_tRP       TRP_2
+#define SDRAM_tRP_num   2
+#define SDRAM_tRAS      TRAS_4
+#define SDRAM_tRAS_num  4
+#define SDRAM_tRCD      TRCD_2
+#define SDRAM_tWR       TWR_2
+#endif
+#if (CONFIG_SCLK_HZ > 66666667) && (CONFIG_SCLK_HZ <= 74626866)
+#define SDRAM_tRP       TRP_2
+#define SDRAM_tRP_num   2
+#define SDRAM_tRAS      TRAS_3
+#define SDRAM_tRAS_num  3
+#define SDRAM_tRCD      TRCD_2
+#define SDRAM_tWR       TWR_2
+#endif
+#if (CONFIG_SCLK_HZ > 59701493) && (CONFIG_SCLK_HZ <= 66666667)
+#define SDRAM_tRP       TRP_1
+#define SDRAM_tRP_num   1
+#define SDRAM_tRAS      TRAS_4
+#define SDRAM_tRAS_num  3
+#define SDRAM_tRCD      TRCD_1
+#define SDRAM_tWR       TWR_2
+#endif
+#if (CONFIG_SCLK_HZ > 44776119) && (CONFIG_SCLK_HZ <= 59701493)
+#define SDRAM_tRP       TRP_1
+#define SDRAM_tRP_num   1
+#define SDRAM_tRAS      TRAS_3
+#define SDRAM_tRAS_num  3
+#define SDRAM_tRCD      TRCD_1
+#define SDRAM_tWR       TWR_2
+#endif
+#if (CONFIG_SCLK_HZ > 29850746) && (CONFIG_SCLK_HZ <= 44776119)
+#define SDRAM_tRP       TRP_1
+#define SDRAM_tRP_num   1
+#define SDRAM_tRAS      TRAS_2
+#define SDRAM_tRAS_num  2
+#define SDRAM_tRCD      TRCD_1
+#define SDRAM_tWR       TWR_2
+#endif
+#if (CONFIG_SCLK_HZ <= 29850746)
+#define SDRAM_tRP       TRP_1
+#define SDRAM_tRP_num   1
+#define SDRAM_tRAS      TRAS_1
+#define SDRAM_tRAS_num  1
+#define SDRAM_tRCD      TRCD_1
+#define SDRAM_tWR       TWR_2
+#endif
+#endif
+
+#if defined(CONFIG_MEM_MT48LC16M8A2TG_75) || \
+    defined(CONFIG_MEM_MT48LC8M32B2B5_7)
+  /*SDRAM INFORMATION: */
+#define SDRAM_Tref  64		/* Refresh period in milliseconds   */
+#define SDRAM_NRA   4096	/* Number of row addresses in SDRAM */
+#define SDRAM_CL    CL_3
+#endif
+
+#if defined(CONFIG_MEM_MT48LC32M8A2_75) || \
+    defined(CONFIG_MEM_MT48LC64M4A2FB_7E) || \
+    defined(CONFIG_MEM_GENERIC_BOARD) || \
+    defined(CONFIG_MEM_MT48LC32M16A2TG_75) || \
+    defined(CONFIG_MEM_MT48LC16M16A2TG_75)
+  /*SDRAM INFORMATION: */
+#define SDRAM_Tref  64		/* Refresh period in milliseconds   */
+#define SDRAM_NRA   8192	/* Number of row addresses in SDRAM */
+#define SDRAM_CL    CL_3
+#endif
+
+
+#ifdef CONFIG_BFIN_KERNEL_CLOCK_MEMINIT_CALC
+/* Equation from section 17 (p17-46) of BF533 HRM */
+#define mem_SDRRC       (((CONFIG_SCLK_HZ / 1000) * SDRAM_Tref) / SDRAM_NRA) - (SDRAM_tRAS_num + SDRAM_tRP_num)
+
+/* Enable SCLK Out */
+#define mem_SDGCTL        (0x80000000 | SCTLE | SDRAM_CL | SDRAM_tRAS | SDRAM_tRP | SDRAM_tRCD | SDRAM_tWR | PSS)
+#else
+#define mem_SDRRC 	CONFIG_MEM_SDRRC
+#define mem_SDGCTL	CONFIG_MEM_SDGCTL
+#endif
+#endif
+
+
+#if defined(EBIU_DDRCTL0)
+#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 defined(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 defined(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 defined(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
+
+#ifdef CONFIG_BFIN_KERNEL_CLOCK_MEMINIT_CALC
+#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
+#else
+#define mem_DDRCTL0	CONFIG_MEM_DDRCTL0
+#define mem_DDRCTL1	CONFIG_MEM_DDRCTL1
+#define mem_DDRCTL2	CONFIG_MEM_DDRCTL2
+#endif
+#endif
+
+#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 *********************************/
+
+#if defined(CONFIG_FLASH_SPEED_BWAT) && \
+defined(CONFIG_FLASH_SPEED_BRAT) && \
+defined(CONFIG_FLASH_SPEED_BHT) && \
+defined(CONFIG_FLASH_SPEED_BST) && \
+defined(CONFIG_FLASH_SPEED_BTT)
+
+#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)
+#endif