Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=971d5bc4e5c75bfc4466deaff09839cd6f918eca
Commit:     971d5bc4e5c75bfc4466deaff09839cd6f918eca
Parent:     b03b08ba9c7235861adf4dde712dade0bb756fe0
Author:     Sonic Zhang <[EMAIL PROTECTED]>
AuthorDate: Sun Jan 27 16:32:31 2008 +0800
Committer:  Bryan Wu <[EMAIL PROTECTED]>
CommitDate: Sun Jan 27 16:32:31 2008 +0800

    [Blackfin] arch: Fix bug to Enable bf548 to Re-program Clocks while Kernel 
boots.
    
    Reprogram DDR EBIU register properly for bf548.
    
    Signed-off-by: Sonic Zhang <[EMAIL PROTECTED]>
    Signed-off-by: Bryan Wu <[EMAIL PROTECTED]>
---
 arch/blackfin/Kconfig                           |   19 ++++++-
 arch/blackfin/mach-bf548/head.S                 |   47 +++++++++++++++++
 include/asm-blackfin/mach-bf548/defBF54x_base.h |   31 +++++++++++-
 include/asm-blackfin/mach-bf548/mem_init.h      |   61 ++++++++++++++++++++++-
 4 files changed, 153 insertions(+), 5 deletions(-)

diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index 5ebcfd2..1364dca 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -317,7 +317,7 @@ config VCO_MULT
        range 1 64
        default "22" if BFIN533_EZKIT
        default "45" if BFIN533_STAMP
-       default "20" if (BFIN537_STAMP || BFIN527_EZKIT)
+       default "20" if (BFIN537_STAMP || BFIN527_EZKIT || BFIN548_EZKIT)
        default "22" if BFIN533_BLUETECHNIX_CM
        default "20" if BFIN537_BLUETECHNIX_CM
        default "20" if BFIN561_BLUETECHNIX_CM
@@ -354,7 +354,7 @@ config SCLK_DIV
        range 1 15
        default 5 if BFIN533_EZKIT
        default 5 if BFIN533_STAMP
-       default 4 if (BFIN537_STAMP || BFIN527_EZKIT)
+       default 4 if (BFIN537_STAMP || BFIN527_EZKIT || BFIN548_EZKIT)
        default 5 if BFIN533_BLUETECHNIX_CM
        default 4 if BFIN537_BLUETECHNIX_CM
        default 4 if BFIN561_BLUETECHNIX_CM
@@ -409,6 +409,7 @@ config MEM_SIZE
        default  32 if BFIN533_EZKIT
        default  64 if BFIN527_EZKIT
        default  64 if BFIN537_STAMP
+       default  64 if BFIN548_EZKIT
        default  64 if BFIN561_EZKIT
        default 128 if BFIN533_STAMP
        default  64 if PNAV10
@@ -416,6 +417,7 @@ config MEM_SIZE
 
 config MEM_ADD_WIDTH
        int "SDRAM Memory Address Width"
+       depends on (!BF54x)
        default  9 if BFIN533_EZKIT
        default  9 if BFIN561_EZKIT
        default  9 if H8606_HVSISTEMAS
@@ -424,6 +426,19 @@ config MEM_ADD_WIDTH
        default 11 if BFIN533_STAMP
        default 10 if PNAV10
 
+
+choice
+       prompt "DDR SDRAM Chip Type"
+       depends on BFIN548_EZKIT
+       default MEM_MT46V32M16_5B
+
+config MEM_MT46V32M16_6T
+        bool "MT46V32M16_6T"
+
+config MEM_MT46V32M16_5B
+        bool "MT46V32M16_5B"
+endchoice
+
 config ENET_FLASH_PIN
        int "PF port/pin used for flash and ethernet sharing"
        depends on (BFIN533_STAMP)
diff --git a/arch/blackfin/mach-bf548/head.S b/arch/blackfin/mach-bf548/head.S
index 745662e..74fe258 100644
--- a/arch/blackfin/mach-bf548/head.S
+++ b/arch/blackfin/mach-bf548/head.S
@@ -324,12 +324,25 @@ ENTRY(_start_dma_code)
        w[p0] = r0.l;
        ssync;
 
+#if defined(CONFIG_BF54x)
+       P2.H = hi(EBIU_RSTCTL);
+       P2.L = lo(EBIU_RSTCTL);
+       R0 = [P2];
+       BITSET (R0, 3);
+#else
        P2.H = hi(EBIU_SDGCTL);
        P2.L = lo(EBIU_SDGCTL);
        R0 = [P2];
        BITSET (R0, 24);
+#endif
        [P2] = R0;
        SSYNC;
+#if defined(CONFIG_BF54x)
+.LSRR_MODE:
+       R0 = [P2];
+       CC = BITTST(R0, 4);
+       if !CC JUMP .LSRR_MODE;
+#endif
 
        r0 = CONFIG_VCO_MULT & 63;       /* Load the VCO multiplier         */
        r0 = r0 << 9;                    /* Shift it over,                  */
@@ -361,6 +374,39 @@ ENTRY(_start_dma_code)
        w[p0] = r0.l;
        ssync;
 
+#if defined(CONFIG_BF54x)
+       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;
+#else
        p0.l = lo(EBIU_SDRRC);
        p0.h = hi(EBIU_SDRRC);
        r0 = mem_SDRRC;
@@ -394,6 +440,7 @@ ENTRY(_start_dma_code)
        R1 = R1 | R0;
        [P2] = R1;
        SSYNC;
+#endif
 
        p0.h = hi(SIC_IWR0);
        p0.l = lo(SIC_IWR0);
diff --git a/include/asm-blackfin/mach-bf548/defBF54x_base.h 
b/include/asm-blackfin/mach-bf548/defBF54x_base.h
index 319a485..08f90c2 100644
--- a/include/asm-blackfin/mach-bf548/defBF54x_base.h
+++ b/include/asm-blackfin/mach-bf548/defBF54x_base.h
@@ -1772,17 +1772,36 @@
 #define                       TRP  0x3c0000   /* Pre charge-to-active command 
period */
 #define                      TRAS  0x3c00000  /* Min Active-to-pre charge time 
*/
 #define                       TRC  0x3c000000 /* Active-to-active time */
+#define DDR_TRAS(x)            ((x<<22)&TRAS)  /* DDR tRAS = (1~15) cycles */
+#define DDR_TRP(x)             ((x<<18)&TRP)   /* DDR tRP = (1~15) cycles */
+#define DDR_TRC(x)             ((x<<26)&TRC)   /* DDR tRC = (1~15) cycles */
+#define DDR_TRFC(x)            ((x<<14)&TRFC)  /* DDR tRFC = (1~15) cycles */
+#define DDR_TREFI(x)           (x&TREFI)       /* DDR tRFC = (1~15) cycles */
 
 /* Bit masks for EBIU_DDRCTL1 */
 
 #define                      TRCD  0xf        /* Active-to-Read/write delay */
-#define                       MRD  0xf0       /* Mode register set to active */
+#define                      TMRD  0xf0       /* Mode register set to active */
 #define                       TWR  0x300      /* Write Recovery time */
 #define               DDRDATWIDTH  0x3000     /* DDR data width */
 #define                  EXTBANKS  0xc000     /* External banks */
 #define               DDRDEVWIDTH  0x30000    /* DDR device width */
 #define                DDRDEVSIZE  0xc0000    /* DDR device size */
-#define                     TWWTR  0xf0000000 /* Write-to-read delay */
+#define                      TWTR  0xf0000000 /* Write-to-read delay */
+#define DDR_TWTR(x)            ((x<<28)&TWTR)  /* DDR tWTR = (1~15) cycles */
+#define DDR_TMRD(x)            ((x<<4)&TMRD)   /* DDR tMRD = (1~15) cycles */
+#define DDR_TWR(x)             ((x<<8)&TWR)    /* DDR tWR = (1~15) cycles */
+#define DDR_TRCD(x)            (x&TRCD)        /* DDR tRCD = (1~15) cycles */
+#define DDR_DATWIDTH           0x2000          /* DDR data width */
+#define EXTBANK_1              0               /* 1 external bank */
+#define EXTBANK_2              0x4000          /* 2 external banks */
+#define DEVSZ_64               0x40000         /* DDR External Bank Size = 
64MB */
+#define DEVSZ_128              0x80000         /* DDR External Bank Size = 
128MB */
+#define DEVSZ_256              0xc0000         /* DDR External Bank Size = 
256MB */
+#define DEVSZ_512              0               /* DDR External Bank Size = 
512MB */
+#define DEVWD_4                        0               /* DDR Device Width = 4 
Bits    */
+#define DEVWD_8                        0x10000         /* DDR Device Width = 8 
Bits    */
+#define DEVWD_16               0x20000         /* DDR Device Width = 16 Bits   
 */
 
 /* Bit masks for EBIU_DDRCTL2 */
 
@@ -1790,6 +1809,10 @@
 #define                CASLATENCY  0x70       /* CAS latency */
 #define                  DLLRESET  0x100      /* DLL Reset */
 #define                      REGE  0x1000     /* Register mode enable */
+#define CL_1_5                 0x50            /* DDR CAS Latency = 1.5 cycles 
*/
+#define CL_2                   0x20            /* DDR CAS Latency = 2 cycles */
+#define CL_2_5                 0x60            /* DDR CAS Latency = 2.5 cycles 
*/
+#define CL_3                   0x30            /* DDR CAS Latency = 3 cycles */
 
 /* Bit masks for EBIU_DDRCTL3 */
 
@@ -2257,6 +2280,10 @@
 
 #define                      CSEL  0x30       /* Core Select */
 #define                      SSEL  0xf        /* System Select */
+#define                        CSEL_DIV1       0x0000  /* CCLK = VCO / 1 */
+#define                        CSEL_DIV2       0x0010  /* CCLK = VCO / 2 */
+#define                        CSEL_DIV4       0x0020  /* CCLK = VCO / 4 */
+#define                        CSEL_DIV8       0x0030  /* CCLK = VCO / 8 */
 
 /* Bit masks for PLL_CTL */
 
diff --git a/include/asm-blackfin/mach-bf548/mem_init.h 
b/include/asm-blackfin/mach-bf548/mem_init.h
index e792eb7..befc290 100644
--- a/include/asm-blackfin/mach-bf548/mem_init.h
+++ b/include/asm-blackfin/mach-bf548/mem_init.h
@@ -28,10 +28,69 @@
  * 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)
 
-#if (CONFIG_MEM_MT46V32M16)
+#if (CONFIG_MEM_MT46V32M16_6T)
+#define DDR_SIZE       DEVSZ_512
+#define DDR_WIDTH      DEVWD_16
+
+#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(MIN_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_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(MIN_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_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 <= 133333333)
+#define        DDR_CL          CL_2
+#elif (CONFIG_SCLK_HZ <= 166666666)
+#define        DDR_CL          CL_2_5
+#else
+#define        DDR_CL          CL_3
+#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
-
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