[ARM] 3430/1: ARM: OMAP: 5/8 Update PM

Patch from Tony Lindgren

Update OMAP PM code from linux-omap tree:

- Move PM code from plat-omap to mach-omap1 and mach-omap2
  by Tony Lindgren
- Add minimal PM support for omap24xx by Tony Lindgren and
  Richard Woodruff
- Misc updates to omap1 PM code by Tuukka Tikkanen et al
- Updates to the SRAM code needed for PM and FB by Imre Deak

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 121 insertions, 22 deletions

diff --git a/arch/arm/plat-omap/sram.c b/arch/arm/plat-omap/sram.c
index ee82763b02b8..b7bf09b1b412 100644
--- a/arch/arm/plat-omap/sram.c
+++ b/arch/arm/plat-omap/sram.c
@@ -16,24 +16,94 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 
-#include <asm/mach/map.h>
 #include <asm/tlb.h>
 #include <asm/io.h>
 #include <asm/cacheflush.h>
 
+#include <asm/mach/map.h>
+
 #include <asm/arch/sram.h>
+#include <asm/arch/board.h>
 
 #define OMAP1_SRAM_PA           0x20000000
 #define OMAP1_SRAM_VA           0xd0000000
 #define OMAP2_SRAM_PA           0x40200000
+#define OMAP2_SRAM_PUB_PA       0x4020f800
 #define OMAP2_SRAM_VA           0xd0000000
+#define OMAP2_SRAM_PUB_VA       0xd0000800
 
+#if defined(CONFIG_ARCH_OMAP24XX)
+#define SRAM_BOOTLOADER_SZ      0x00
+#else
 #define SRAM_BOOTLOADER_SZ      0x80
+#endif
+
+#define VA_REQINFOPERM0         IO_ADDRESS(0x68005048)
+#define VA_READPERM0            IO_ADDRESS(0x68005050)
+#define VA_WRITEPERM0           IO_ADDRESS(0x68005058)
+#define VA_CONTROL_STAT         IO_ADDRESS(0x480002F8)
+#define GP_DEVICE               0x300
+#define TYPE_MASK               0x700
+
+#define ROUND_DOWN(value,boundary)      ((value) & (~((boundary)-1)))
 
 static unsigned long omap_sram_base;
 static unsigned long omap_sram_size;
 static unsigned long omap_sram_ceil;
 
+unsigned long omap_fb_sram_start;
+unsigned long omap_fb_sram_size;
+
+/* Depending on the target RAMFS firewall setup, the public usable amount of
+ * SRAM varies.  The default accessable size for all device types is 2k. A GP
+ * device allows ARM11 but not other initators for full size. This
+ * functionality seems ok until some nice security API happens.
+ */
+static int is_sram_locked(void)
+{
+        int type = 0;
+
+        if (cpu_is_omap242x())
+                type = __raw_readl(VA_CONTROL_STAT) & TYPE_MASK;
+
+        if (type == GP_DEVICE) {
+                /* RAMFW: R/W access to all initators for all qualifier sets */
+                if (cpu_is_omap242x()) {
+                        __raw_writel(0xFF, VA_REQINFOPERM0); /* all q-vects */
+                        __raw_writel(0xCFDE, VA_READPERM0);  /* all i-read */
+                        __raw_writel(0xCFDE, VA_WRITEPERM0); /* all i-write */
+                }
+                return 0;
+        } else
+                return 1; /* assume locked with no PPA or security driver */
+}
+
+void get_fb_sram_conf(unsigned long start_avail, unsigned size_avail,
+                      unsigned long *start, unsigned long *size)
+{
+        const struct omap_fbmem_config *fbmem_conf;
+
+        fbmem_conf = omap_get_config(OMAP_TAG_FBMEM, struct omap_fbmem_config);
+        if (fbmem_conf != NULL) {
+                *start = fbmem_conf->fb_sram_start;
+                *size = fbmem_conf->fb_sram_size;
+        } else {
+                *size = 0;
+                *start = 0;
+        }
+
+        if (*size && (
+            *start < start_avail ||
+            *start + *size > start_avail + size_avail)) {
+                printk(KERN_ERR "invalid FB SRAM configuration\n");
+                *start = start_avail;
+                *size = size_avail;
+        }
+
+        if (*size)
+                pr_info("Reserving %lu bytes SRAM for frame buffer\n", *size);
+}
+
 /*
  * The amount of SRAM depends on the core type.
  * Note that we cannot try to test for SRAM here because writes
@@ -42,26 +112,45 @@ static unsigned long omap_sram_ceil;
  */
 void __init omap_detect_sram(void)
 {
-        if (!cpu_is_omap24xx())
+        unsigned long sram_start;
+
+        if (cpu_is_omap24xx()) {
+                if (is_sram_locked()) {
+                        omap_sram_base = OMAP2_SRAM_PUB_VA;
+                        sram_start = OMAP2_SRAM_PUB_PA;
+                        omap_sram_size = 0x800; /* 2K */
+                } else {
+                        omap_sram_base = OMAP2_SRAM_VA;
+                        sram_start = OMAP2_SRAM_PA;
+                        if (cpu_is_omap242x())
+                                omap_sram_size = 0xa0000; /* 640K */
+                        else if (cpu_is_omap243x())
+                                omap_sram_size = 0x10000; /* 64K */
+                }
+        } else {
                 omap_sram_base = OMAP1_SRAM_VA;
-        else
-                omap_sram_base = OMAP2_SRAM_VA;
-
-        if (cpu_is_omap730())
-                omap_sram_size = 0x32000;       /* 200K */
-        else if (cpu_is_omap15xx())
-                omap_sram_size = 0x30000;       /* 192K */
-        else if (cpu_is_omap1610() || cpu_is_omap1621() || cpu_is_omap1710())
-                omap_sram_size = 0x4000;        /* 16K */
-        else if (cpu_is_omap1611())
-                omap_sram_size = 0x3e800;       /* 250K */
-        else if (cpu_is_omap2420())
-                omap_sram_size = 0xa0014;       /* 640K */
-        else {
-                printk(KERN_ERR "Could not detect SRAM size\n");
-                omap_sram_size = 0x4000;
+                sram_start = OMAP1_SRAM_PA;
+
+                if (cpu_is_omap730())
+                        omap_sram_size = 0x32000;       /* 200K */
+                else if (cpu_is_omap15xx())
+                        omap_sram_size = 0x30000;       /* 192K */
+                else if (cpu_is_omap1610() || cpu_is_omap1621() ||
+                     cpu_is_omap1710())
+                        omap_sram_size = 0x4000;        /* 16K */
+                else if (cpu_is_omap1611())
+                        omap_sram_size = 0x3e800;       /* 250K */
+                else {
+                        printk(KERN_ERR "Could not detect SRAM size\n");
+                        omap_sram_size = 0x4000;
+                }
         }
-
+        get_fb_sram_conf(sram_start + SRAM_BOOTLOADER_SZ,
+                         omap_sram_size - SRAM_BOOTLOADER_SZ,
+                         &omap_fb_sram_start, &omap_fb_sram_size);
+        if (omap_fb_sram_size)
+                omap_sram_size -= sram_start + omap_sram_size -
+                                  omap_fb_sram_start;
         omap_sram_ceil = omap_sram_base + omap_sram_size;
 }
 
@@ -80,12 +169,20 @@ static struct map_desc omap_sram_io_desc[] __initdata = {
  */
 void __init omap_map_sram(void)
 {
+        unsigned long base;
+
         if (omap_sram_size == 0)
                 return;
 
         if (cpu_is_omap24xx()) {
                 omap_sram_io_desc[0].virtual = OMAP2_SRAM_VA;
-                omap_sram_io_desc[0].pfn = __phys_to_pfn(OMAP2_SRAM_PA);
+
+                if (is_sram_locked())
+                        base = OMAP2_SRAM_PUB_PA;
+                else
+                        base = OMAP2_SRAM_PA;
+                base = ROUND_DOWN(base, PAGE_SIZE);
+                omap_sram_io_desc[0].pfn = __phys_to_pfn(base);
         }
 
         omap_sram_io_desc[0].length = (omap_sram_size + PAGE_SIZE-1)/PAGE_SIZE;
@@ -93,7 +190,8 @@ void __init omap_map_sram(void)
         iotable_init(omap_sram_io_desc, ARRAY_SIZE(omap_sram_io_desc));
 
         printk(KERN_INFO "SRAM: Mapped pa 0x%08lx to va 0x%08lx size: 0x%lx\n",
-               omap_sram_io_desc[0].pfn, omap_sram_io_desc[0].virtual,
+        __pfn_to_phys(omap_sram_io_desc[0].pfn),
+        omap_sram_io_desc[0].virtual,
                omap_sram_io_desc[0].length);
 
         /*
@@ -118,8 +216,9 @@ void * omap_sram_push(void * start, unsigned long size)
                 printk(KERN_ERR "Not enough space in SRAM\n");
                 return NULL;
         }
+
         omap_sram_ceil -= size;
-        omap_sram_ceil &= ~0x3;
+        omap_sram_ceil = ROUND_DOWN(omap_sram_ceil, sizeof(void *));
         memcpy((void *)omap_sram_ceil, start, size);
 
         return (void *)omap_sram_ceil;