AVR32: Resource management rewrite

[u-boot] / cpu / at32ap / hsdramc.c

diff --git a/cpu/at32ap/hsdramc.c b/cpu/at32ap/hsdramc.c
index f36da354528daaa6fae939341cecc3126898105b..a936e03166c1d81de52c760962b642c933ee92f5 100644 (file)
--- a/cpu/at32ap/hsdramc.c
+++ b/cpu/at32ap/hsdramc.c
@@ -25,17 +25,11 @@
 #include <asm/io.h>
 #include <asm/sdram.h>
 
-#include <asm/arch/platform.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/memory-map.h>
 
 #include "hsdramc1.h"
 
-struct hsdramc {
-       const struct device *hebi;
-       void *regs;
-};
-
-static struct hsdramc hsdramc;
-
 unsigned long sdram_init(const struct sdram_info *info)
 {
        unsigned long *sdram = (unsigned long *)uncached(info->phys_addr);
@@ -44,16 +38,6 @@ unsigned long sdram_init(const struct sdram_info *info)
        unsigned long bus_hz;
        unsigned int i;
 
-       hsdramc.hebi = get_device(DEVICE_HEBI);
-       if (!hsdramc.hebi)
-               return 0;
-
-       /* FIXME: Both of these lines are complete hacks */
-       hsdramc.regs = hsdramc.hebi->regs + 0x400;
-       bus_hz = pm_get_clock_freq(hsdramc.hebi->resource[0].u.clock.id);
-
-       cpu_enable_sdram();
-
        tmp = (HSDRAMC1_BF(NC, info->col_bits - 8)
               | HSDRAMC1_BF(NR, info->row_bits - 11)
               | HSDRAMC1_BF(NB, info->bank_bits - 1)
@@ -74,7 +58,7 @@ unsigned long sdram_init(const struct sdram_info *info)
                           + info->bank_bits + 2);
 #endif
 
-       hsdramc1_writel(&hsdramc, CR, tmp);
+       hsdramc1_writel(CR, tmp);
 
        /*
         * Initialization sequence for SDRAM, from the data sheet:
@@ -87,15 +71,15 @@ unsigned long sdram_init(const struct sdram_info *info)
        /*
         * 2. A Precharge All command is issued to the SDRAM
         */
-       hsdramc1_writel(&hsdramc, MR, HSDRAMC1_MODE_BANKS_PRECHARGE);
-       hsdramc1_readl(&hsdramc, MR);
+       hsdramc1_writel(MR, HSDRAMC1_MODE_BANKS_PRECHARGE);
+       hsdramc1_readl(MR);
        writel(0, sdram);
 
        /*
         * 3. Eight auto-refresh (CBR) cycles are provided
         */
-       hsdramc1_writel(&hsdramc, MR, HSDRAMC1_MODE_AUTO_REFRESH);
-       hsdramc1_readl(&hsdramc, MR);
+       hsdramc1_writel(MR, HSDRAMC1_MODE_AUTO_REFRESH);
+       hsdramc1_readl(MR);
        for (i = 0; i < 8; i++)
                writel(0, sdram);
 
@@ -106,8 +90,8 @@ unsigned long sdram_init(const struct sdram_info *info)
         *
         * CAS from info struct, burst length 1, serial burst type
         */
-       hsdramc1_writel(&hsdramc, MR, HSDRAMC1_MODE_LOAD_MODE);
-       hsdramc1_readl(&hsdramc, MR);
+       hsdramc1_writel(MR, HSDRAMC1_MODE_LOAD_MODE);
+       hsdramc1_readl(MR);
        writel(0, sdram + (info->cas << 4));
 
        /*
@@ -117,9 +101,9 @@ unsigned long sdram_init(const struct sdram_info *info)
         * From the timing diagram, it looks like tMRD is 3
         * cycles...try a dummy read from the peripheral bus.
         */
-       hsdramc1_readl(&hsdramc, MR);
-       hsdramc1_writel(&hsdramc, MR, HSDRAMC1_MODE_NORMAL);
-       hsdramc1_readl(&hsdramc, MR);
+       hsdramc1_readl(MR);
+       hsdramc1_writel(MR, HSDRAMC1_MODE_NORMAL);
+       hsdramc1_readl(MR);
        writel(0, sdram);
 
        /*
@@ -128,7 +112,8 @@ unsigned long sdram_init(const struct sdram_info *info)
         *
         * 15.6 us is a typical value for a burst of length one
         */
-       hsdramc1_writel(&hsdramc, TR, (156 * (bus_hz / 1000)) / 10000);
+       bus_hz = get_sdram_clk_rate();
+       hsdramc1_writel(TR, (156 * (bus_hz / 1000)) / 10000);
 
        printf("SDRAM: %u MB at address 0x%08lx\n",
               sdram_size >> 20, info->phys_addr);