mfd: wm5110: Make DSP memories readable

Expose the memory regions used by the DSP cores on WM5110 as readable
and volatile.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 65 insertions, 4 deletions

diff --git a/drivers/mfd/wm5110-tables.c b/drivers/mfd/wm5110-tables.c
index 3113e39b318e..4430404471c0 100644
--- a/drivers/mfd/wm5110-tables.c
+++ b/drivers/mfd/wm5110-tables.c
@@ -14,6 +14,7 @@
 
 #include <linux/mfd/arizona/core.h>
 #include <linux/mfd/arizona/registers.h>
+#include <linux/device.h>
 
 #include "arizona.h"
 
@@ -1336,6 +1337,64 @@ static const struct reg_default wm5110_reg_default[] = {
         { 0x00001404, 0x0000 },    /* R5124  - DSP4 Status 1 */
 };
 
+static bool wm5110_is_rev_b_adsp_memory(unsigned int reg)
+{
+        if ((reg >= 0x100000 && reg < 0x103000) ||
+            (reg >= 0x180000 && reg < 0x181000) ||
+            (reg >= 0x190000 && reg < 0x192000) ||
+            (reg >= 0x1a8000 && reg < 0x1a9000) ||
+            (reg >= 0x200000 && reg < 0x209000) ||
+            (reg >= 0x280000 && reg < 0x281000) ||
+            (reg >= 0x290000 && reg < 0x29a000) ||
+            (reg >= 0x2a8000 && reg < 0x2aa000) ||
+            (reg >= 0x300000 && reg < 0x30f000) ||
+            (reg >= 0x380000 && reg < 0x382000) ||
+            (reg >= 0x390000 && reg < 0x39e000) ||
+            (reg >= 0x3a8000 && reg < 0x3b6000) ||
+            (reg >= 0x400000 && reg < 0x403000) ||
+            (reg >= 0x480000 && reg < 0x481000) ||
+            (reg >= 0x490000 && reg < 0x492000) ||
+            (reg >= 0x4a8000 && reg < 0x4a9000))
+                return true;
+        else
+                return false;
+}
+
+static bool wm5110_is_rev_d_adsp_memory(unsigned int reg)
+{
+        if ((reg >= 0x100000 && reg < 0x106000) ||
+            (reg >= 0x180000 && reg < 0x182000) ||
+            (reg >= 0x190000 && reg < 0x198000) ||
+            (reg >= 0x1a8000 && reg < 0x1aa000) ||
+            (reg >= 0x200000 && reg < 0x20f000) ||
+            (reg >= 0x280000 && reg < 0x282000) ||
+            (reg >= 0x290000 && reg < 0x29c000) ||
+            (reg >= 0x2a6000 && reg < 0x2b4000) ||
+            (reg >= 0x300000 && reg < 0x30f000) ||
+            (reg >= 0x380000 && reg < 0x382000) ||
+            (reg >= 0x390000 && reg < 0x3a2000) ||
+            (reg >= 0x3a6000 && reg < 0x3b4000) ||
+            (reg >= 0x400000 && reg < 0x406000) ||
+            (reg >= 0x480000 && reg < 0x482000) ||
+            (reg >= 0x490000 && reg < 0x498000) ||
+            (reg >= 0x4a8000 && reg < 0x4aa000))
+                return true;
+        else
+                return false;
+}
+
+static bool wm5110_is_adsp_memory(struct device *dev, unsigned int reg)
+{
+        struct arizona *arizona = dev_get_drvdata(dev);
+
+        switch (arizona->rev) {
+        case 0 ... 2:
+                return wm5110_is_rev_b_adsp_memory(reg);
+        default:
+                return wm5110_is_rev_d_adsp_memory(reg);
+        }
+}
+
 static bool wm5110_readable_register(struct device *dev, unsigned int reg)
 {
         switch (reg) {
@@ -2308,7 +2367,7 @@ static bool wm5110_readable_register(struct device *dev, unsigned int reg)
         case ARIZONA_DSP4_STATUS_3:
                 return true;
         default:
-                return false;
+                return wm5110_is_adsp_memory(dev, reg);
         }
 }
 
@@ -2368,16 +2427,18 @@ static bool wm5110_volatile_register(struct device *dev, unsigned int reg)
         case ARIZONA_DSP4_STATUS_3:
                 return true;
         default:
-                return false;
+                return wm5110_is_adsp_memory(dev, reg);
         }
 }
 
+#define WM5110_MAX_REGISTER 0x4a9fff
+
 const struct regmap_config wm5110_spi_regmap = {
         .reg_bits = 32,
         .pad_bits = 16,
         .val_bits = 16,
 
-        .max_register = ARIZONA_DSP1_STATUS_2,
+        .max_register = WM5110_MAX_REGISTER,
         .readable_reg = wm5110_readable_register,
         .volatile_reg = wm5110_volatile_register,
 
@@ -2391,7 +2452,7 @@ const struct regmap_config wm5110_i2c_regmap = {
         .reg_bits = 32,
         .val_bits = 16,
 
-        .max_register = ARIZONA_DSP1_STATUS_2,
+        .max_register = WM5110_MAX_REGISTER,
         .readable_reg = wm5110_readable_register,
         .volatile_reg = wm5110_volatile_register,