1 files changed, 113 insertions, 24 deletions

diff --git a/drivers/sh/pfc.c b/drivers/sh/pfc.c
index e67fe170d8d5..e7d127a9c1c5 100644
--- a/drivers/sh/pfc.c
+++ b/drivers/sh/pfc.c
@@ -19,6 +19,75 @@
 #include <linux/irq.h>
 #include <linux/bitops.h>
 #include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+
+static void pfc_iounmap(struct pinmux_info *pip)
+{
+        int k;
+
+        for (k = 0; k < pip->num_resources; k++)
+                if (pip->window[k].virt)
+                        iounmap(pip->window[k].virt);
+
+        kfree(pip->window);
+        pip->window = NULL;
+}
+
+static int pfc_ioremap(struct pinmux_info *pip)
+{
+        struct resource *res;
+        int k;
+
+        if (!pip->num_resources)
+                return 0;
+
+        pip->window = kzalloc(pip->num_resources * sizeof(*pip->window),
+                              GFP_NOWAIT);
+        if (!pip->window)
+                goto err1;
+
+        for (k = 0; k < pip->num_resources; k++) {
+                res = pip->resource + k;
+                WARN_ON(resource_type(res) != IORESOURCE_MEM);
+                pip->window[k].phys = res->start;
+                pip->window[k].size = resource_size(res);
+                pip->window[k].virt = ioremap_nocache(res->start,
+                                                         resource_size(res));
+                if (!pip->window[k].virt)
+                        goto err2;
+        }
+
+        return 0;
+
+err2:
+        pfc_iounmap(pip);
+err1:
+        return -1;
+}
+
+static void __iomem *pfc_phys_to_virt(struct pinmux_info *pip,
+                                      unsigned long address)
+{
+        struct pfc_window *window;
+        int k;
+
+        /* scan through physical windows and convert address */
+        for (k = 0; k < pip->num_resources; k++) {
+                window = pip->window + k;
+
+                if (address < window->phys)
+                        continue;
+
+                if (address >= (window->phys + window->size))
+                        continue;
+
+                return window->virt + (address - window->phys);
+        }
+
+        /* no windows defined, register must be 1:1 mapped virt:phys */
+        return (void __iomem *)address;
+}
 
 static int enum_in_range(pinmux_enum_t enum_id, struct pinmux_range *r)
 {
@@ -31,35 +100,35 @@ static int enum_in_range(pinmux_enum_t enum_id, struct pinmux_range *r)
         return 1;
 }
 
-static unsigned long gpio_read_raw_reg(unsigned long reg,
+static unsigned long gpio_read_raw_reg(void __iomem *mapped_reg,
                                        unsigned long reg_width)
 {
         switch (reg_width) {
         case 8:
-                return __raw_readb(reg);
+                return ioread8(mapped_reg);
         case 16:
-                return __raw_readw(reg);
+                return ioread16(mapped_reg);
         case 32:
-                return __raw_readl(reg);
+                return ioread32(mapped_reg);
         }
 
         BUG();
         return 0;
 }
 
-static void gpio_write_raw_reg(unsigned long reg,
+static void gpio_write_raw_reg(void __iomem *mapped_reg,
                                unsigned long reg_width,
                                unsigned long data)
 {
         switch (reg_width) {
         case 8:
-                __raw_writeb(data, reg);
+                iowrite8(data, mapped_reg);
                 return;
         case 16:
-                __raw_writew(data, reg);
+                iowrite16(data, mapped_reg);
                 return;
         case 32:
-                __raw_writel(data, reg);
+                iowrite32(data, mapped_reg);
                 return;
         }
 
@@ -82,11 +151,12 @@ static void gpio_write_bit(struct pinmux_data_reg *dr,
         else
                 clear_bit(pos, &dr->reg_shadow);
 
-        gpio_write_raw_reg(dr->reg, dr->reg_width, dr->reg_shadow);
+        gpio_write_raw_reg(dr->mapped_reg, dr->reg_width, dr->reg_shadow);
 }
 
-static int gpio_read_reg(unsigned long reg, unsigned long reg_width,
-                         unsigned long field_width, unsigned long in_pos)
+static int gpio_read_reg(void __iomem *mapped_reg, unsigned long reg_width,
+                         unsigned long field_width, unsigned long in_pos,
+                         unsigned long reg)
 {
         unsigned long data, mask, pos;
 
@@ -98,13 +168,13 @@ static int gpio_read_reg(unsigned long reg, unsigned long reg_width,
                  "r_width = %ld, f_width = %ld\n",
                  reg, pos, reg_width, field_width);
 
-        data = gpio_read_raw_reg(reg, reg_width);
+        data = gpio_read_raw_reg(mapped_reg, reg_width);
         return (data >> pos) & mask;
 }
 
-static void gpio_write_reg(unsigned long reg, unsigned long reg_width,
+static void gpio_write_reg(void __iomem *mapped_reg, unsigned long reg_width,
                            unsigned long field_width, unsigned long in_pos,
-                           unsigned long value)
+                           unsigned long value, unsigned long reg)
 {
         unsigned long mask, pos;
 
@@ -120,13 +190,13 @@ static void gpio_write_reg(unsigned long reg, unsigned long reg_width,
 
         switch (reg_width) {
         case 8:
-                __raw_writeb((__raw_readb(reg) & mask) | value, reg);
+                iowrite8((ioread8(mapped_reg) & mask) | value, mapped_reg);
                 break;
         case 16:
-                __raw_writew((__raw_readw(reg) & mask) | value, reg);
+                iowrite16((ioread16(mapped_reg) & mask) | value, mapped_reg);
                 break;
         case 32:
-                __raw_writel((__raw_readl(reg) & mask) | value, reg);
+                iowrite32((ioread32(mapped_reg) & mask) | value, mapped_reg);
                 break;
         }
 }
@@ -147,6 +217,8 @@ static int setup_data_reg(struct pinmux_info *gpioc, unsigned gpio)
                 if (!data_reg->reg_width)
                         break;
 
+                data_reg->mapped_reg = pfc_phys_to_virt(gpioc, data_reg->reg);
+
                 for (n = 0; n < data_reg->reg_width; n++) {
                         if (data_reg->enum_ids[n] == gpiop->enum_id) {
                                 gpiop->flags &= ~PINMUX_FLAG_DREG;
@@ -179,7 +251,8 @@ static void setup_data_regs(struct pinmux_info *gpioc)
                 if (!drp->reg_width)
                         break;
 
-                drp->reg_shadow = gpio_read_raw_reg(drp->reg, drp->reg_width);
+                drp->reg_shadow = gpio_read_raw_reg(drp->mapped_reg,
+                                                    drp->reg_width);
                 k++;
         }
 }
@@ -266,12 +339,16 @@ static void write_config_reg(struct pinmux_info *gpioc,
                              int index)
 {
         unsigned long ncomb, pos, value;
+        void __iomem *mapped_reg;
 
         ncomb = 1 << crp->field_width;
         pos = index / ncomb;
         value = index % ncomb;
 
-        gpio_write_reg(crp->reg, crp->reg_width, crp->field_width, pos, value);
+        mapped_reg = pfc_phys_to_virt(gpioc, crp->reg);
+
+        gpio_write_reg(mapped_reg, crp->reg_width, crp->field_width,
+                       pos, value, crp->reg);
 }
 
 static int check_config_reg(struct pinmux_info *gpioc,
@@ -279,13 +356,16 @@ static int check_config_reg(struct pinmux_info *gpioc,
                             int index)
 {
         unsigned long ncomb, pos, value;
+        void __iomem *mapped_reg;
 
         ncomb = 1 << crp->field_width;
         pos = index / ncomb;
         value = index % ncomb;
 
-        if (gpio_read_reg(crp->reg, crp->reg_width,
-                          crp->field_width, pos) == value)
+        mapped_reg = pfc_phys_to_virt(gpioc, crp->reg);
+
+        if (gpio_read_reg(mapped_reg, crp->reg_width,
+                          crp->field_width, pos, crp->reg) == value)
                 return 0;
 
         return -1;
@@ -564,7 +644,7 @@ static int sh_gpio_get_value(struct pinmux_info *gpioc, unsigned gpio)
         if (!gpioc || get_data_reg(gpioc, gpio, &dr, &bit) != 0)
                 return -EINVAL;
 
-        return gpio_read_reg(dr->reg, dr->reg_width, 1, bit);
+        return gpio_read_reg(dr->mapped_reg, dr->reg_width, 1, bit, dr->reg);
 }
 
 static int sh_gpio_get(struct gpio_chip *chip, unsigned offset)
@@ -606,10 +686,15 @@ static int sh_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
 int register_pinmux(struct pinmux_info *pip)
 {
         struct gpio_chip *chip = &pip->chip;
+        int ret;
 
         pr_info("%s handling gpio %d -> %d\n",
                 pip->name, pip->first_gpio, pip->last_gpio);
 
+        ret = pfc_ioremap(pip);
+        if (ret < 0)
+                return ret;
+
         setup_data_regs(pip);
 
         chip->request = sh_gpio_request;
@@ -627,12 +712,16 @@ int register_pinmux(struct pinmux_info *pip)
         chip->base = pip->first_gpio;
         chip->ngpio = (pip->last_gpio - pip->first_gpio) + 1;
 
-        return gpiochip_add(chip);
+        ret = gpiochip_add(chip);
+        if (ret < 0)
+                pfc_iounmap(pip);
+
+        return ret;
 }
 
 int unregister_pinmux(struct pinmux_info *pip)
 {
         pr_info("%s deregistering\n", pip->name);
-
+        pfc_iounmap(pip);
         return gpiochip_remove(&pip->chip);
 }