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authorLinus Torvalds <torvalds@linux-foundation.org>2012-01-11 23:29:20 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-11 23:29:20 -0800
commit4c4d285ad5665bfbd983b95fde8d7a477d24a361 (patch)
tree05da51053d4c8943ae21ea0b152aef4c67eba19d /drivers/sh
parent56c8bc3b7ed3d24c665e2ce992f86a5bedffc852 (diff)
parente64e1b11b14d363ac70fd13ab809969a6d7e42a8 (diff)
downloadlinux-4c4d285ad5665bfbd983b95fde8d7a477d24a361.tar.bz2
Merge tag 'rmobile-for-linus' of git://github.com/pmundt/linux-sh
SH/R-Mobile updates for 3.3 merge window. * tag 'rmobile-for-linus' of git://github.com/pmundt/linux-sh: (32 commits) arm: mach-shmobile: add a resource name for shdma ARM: mach-shmobile: r8a7779 SMP support V3 ARM: mach-shmobile: Add kota2 defconfig. ARM: mach-shmobile: Add marzen defconfig. ARM: mach-shmobile: r8a7779 power domain support V2 ARM: mach-shmobile: Fix up marzen build for recent GIC changes. ARM: mach-shmobile: r8a7779 PFC function support ARM: mach-shmobile: Flush caches in platform_cpu_die() ARM: mach-shmobile: Allow SoC specific CPU kill code ARM: mach-shmobile: Fix headsmp.S code to use CPUINIT ARM: mach-shmobile: clock-r8a7779: clkz/clkzs support ARM: mach-shmobile: clock-r8a7779: add DIV4 clock support ARM: mach-shmobile: Marzen LAN89218 support ARM: mach-shmobile: Marzen SCIF2/SCIF4 support ARM: mach-shmobile: r8a7779 PFC GPIO-only support V2 ARM: mach-shmobile: r8a7779 and Marzen base support V2 sh: pfc: Unlock register support sh: pfc: Variable bitfield width config register support sh: pfc: Add config_reg_helper() function sh: pfc: Convert index to field and value pair ...
Diffstat (limited to 'drivers/sh')
-rw-r--r--drivers/sh/pfc.c176
1 files changed, 94 insertions, 82 deletions
diff --git a/drivers/sh/pfc.c b/drivers/sh/pfc.c
index e7d127a9c1c5..522c6c46d1be 100644
--- a/drivers/sh/pfc.c
+++ b/drivers/sh/pfc.c
@@ -135,6 +135,19 @@ static void gpio_write_raw_reg(void __iomem *mapped_reg,
BUG();
}
+static int gpio_read_bit(struct pinmux_data_reg *dr,
+ unsigned long in_pos)
+{
+ unsigned long pos;
+
+ pos = dr->reg_width - (in_pos + 1);
+
+ pr_debug("read_bit: addr = %lx, pos = %ld, "
+ "r_width = %ld\n", dr->reg, pos, dr->reg_width);
+
+ return (gpio_read_raw_reg(dr->mapped_reg, dr->reg_width) >> pos) & 1;
+}
+
static void gpio_write_bit(struct pinmux_data_reg *dr,
unsigned long in_pos, unsigned long value)
{
@@ -154,51 +167,69 @@ static void gpio_write_bit(struct pinmux_data_reg *dr,
gpio_write_raw_reg(dr->mapped_reg, dr->reg_width, dr->reg_shadow);
}
-static int gpio_read_reg(void __iomem *mapped_reg, unsigned long reg_width,
- unsigned long field_width, unsigned long in_pos,
- unsigned long reg)
+static void config_reg_helper(struct pinmux_info *gpioc,
+ struct pinmux_cfg_reg *crp,
+ unsigned long in_pos,
+ void __iomem **mapped_regp,
+ unsigned long *maskp,
+ unsigned long *posp)
{
- unsigned long data, mask, pos;
+ int k;
- data = 0;
- mask = (1 << field_width) - 1;
- pos = reg_width - ((in_pos + 1) * field_width);
+ *mapped_regp = pfc_phys_to_virt(gpioc, crp->reg);
- pr_debug("read_reg: addr = %lx, pos = %ld, "
+ if (crp->field_width) {
+ *maskp = (1 << crp->field_width) - 1;
+ *posp = crp->reg_width - ((in_pos + 1) * crp->field_width);
+ } else {
+ *maskp = (1 << crp->var_field_width[in_pos]) - 1;
+ *posp = crp->reg_width;
+ for (k = 0; k <= in_pos; k++)
+ *posp -= crp->var_field_width[k];
+ }
+}
+
+static int read_config_reg(struct pinmux_info *gpioc,
+ struct pinmux_cfg_reg *crp,
+ unsigned long field)
+{
+ void __iomem *mapped_reg;
+ unsigned long mask, pos;
+
+ config_reg_helper(gpioc, crp, field, &mapped_reg, &mask, &pos);
+
+ pr_debug("read_reg: addr = %lx, field = %ld, "
"r_width = %ld, f_width = %ld\n",
- reg, pos, reg_width, field_width);
+ crp->reg, field, crp->reg_width, crp->field_width);
- data = gpio_read_raw_reg(mapped_reg, reg_width);
- return (data >> pos) & mask;
+ return (gpio_read_raw_reg(mapped_reg, crp->reg_width) >> pos) & mask;
}
-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 reg)
+static void write_config_reg(struct pinmux_info *gpioc,
+ struct pinmux_cfg_reg *crp,
+ unsigned long field, unsigned long value)
{
- unsigned long mask, pos;
+ void __iomem *mapped_reg;
+ unsigned long mask, pos, data;
- mask = (1 << field_width) - 1;
- pos = reg_width - ((in_pos + 1) * field_width);
+ config_reg_helper(gpioc, crp, field, &mapped_reg, &mask, &pos);
- pr_debug("write_reg addr = %lx, value = %ld, pos = %ld, "
+ pr_debug("write_reg addr = %lx, value = %ld, field = %ld, "
"r_width = %ld, f_width = %ld\n",
- reg, value, pos, reg_width, field_width);
+ crp->reg, value, field, crp->reg_width, crp->field_width);
mask = ~(mask << pos);
value = value << pos;
- switch (reg_width) {
- case 8:
- iowrite8((ioread8(mapped_reg) & mask) | value, mapped_reg);
- break;
- case 16:
- iowrite16((ioread16(mapped_reg) & mask) | value, mapped_reg);
- break;
- case 32:
- iowrite32((ioread32(mapped_reg) & mask) | value, mapped_reg);
- break;
- }
+ data = gpio_read_raw_reg(mapped_reg, crp->reg_width);
+ data &= mask;
+ data |= value;
+
+ if (gpioc->unlock_reg)
+ gpio_write_raw_reg(pfc_phys_to_virt(gpioc, gpioc->unlock_reg),
+ 32, ~data);
+
+ gpio_write_raw_reg(mapped_reg, crp->reg_width, data);
}
static int setup_data_reg(struct pinmux_info *gpioc, unsigned gpio)
@@ -274,12 +305,13 @@ static int get_data_reg(struct pinmux_info *gpioc, unsigned gpio,
}
static int get_config_reg(struct pinmux_info *gpioc, pinmux_enum_t enum_id,
- struct pinmux_cfg_reg **crp, int *indexp,
+ struct pinmux_cfg_reg **crp,
+ int *fieldp, int *valuep,
unsigned long **cntp)
{
struct pinmux_cfg_reg *config_reg;
- unsigned long r_width, f_width;
- int k, n;
+ unsigned long r_width, f_width, curr_width, ncomb;
+ int k, m, n, pos, bit_pos;
k = 0;
while (1) {
@@ -290,13 +322,27 @@ static int get_config_reg(struct pinmux_info *gpioc, pinmux_enum_t enum_id,
if (!r_width)
break;
- for (n = 0; n < (r_width / f_width) * (1 << f_width); n++) {
- if (config_reg->enum_ids[n] == enum_id) {
- *crp = config_reg;
- *indexp = n;
- *cntp = &config_reg->cnt[n / (1 << f_width)];
- return 0;
+
+ pos = 0;
+ m = 0;
+ for (bit_pos = 0; bit_pos < r_width; bit_pos += curr_width) {
+ if (f_width)
+ curr_width = f_width;
+ else
+ curr_width = config_reg->var_field_width[m];
+
+ ncomb = 1 << curr_width;
+ for (n = 0; n < ncomb; n++) {
+ if (config_reg->enum_ids[pos + n] == enum_id) {
+ *crp = config_reg;
+ *fieldp = m;
+ *valuep = n;
+ *cntp = &config_reg->cnt[m];
+ return 0;
+ }
}
+ pos += ncomb;
+ m++;
}
k++;
}
@@ -334,43 +380,6 @@ static int get_gpio_enum_id(struct pinmux_info *gpioc, unsigned gpio,
return -1;
}
-static void write_config_reg(struct pinmux_info *gpioc,
- struct pinmux_cfg_reg *crp,
- int index)
-{
- unsigned long ncomb, pos, value;
- void __iomem *mapped_reg;
-
- ncomb = 1 << crp->field_width;
- pos = index / ncomb;
- value = index % ncomb;
-
- 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,
- struct pinmux_cfg_reg *crp,
- int index)
-{
- unsigned long ncomb, pos, value;
- void __iomem *mapped_reg;
-
- ncomb = 1 << crp->field_width;
- pos = index / ncomb;
- value = index % ncomb;
-
- 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;
-}
-
enum { GPIO_CFG_DRYRUN, GPIO_CFG_REQ, GPIO_CFG_FREE };
static int pinmux_config_gpio(struct pinmux_info *gpioc, unsigned gpio,
@@ -379,7 +388,7 @@ static int pinmux_config_gpio(struct pinmux_info *gpioc, unsigned gpio,
struct pinmux_cfg_reg *cr = NULL;
pinmux_enum_t enum_id;
struct pinmux_range *range;
- int in_range, pos, index;
+ int in_range, pos, field, value;
unsigned long *cntp;
switch (pinmux_type) {
@@ -410,7 +419,8 @@ static int pinmux_config_gpio(struct pinmux_info *gpioc, unsigned gpio,
pos = 0;
enum_id = 0;
- index = 0;
+ field = 0;
+ value = 0;
while (1) {
pos = get_gpio_enum_id(gpioc, gpio, pos, &enum_id);
if (pos <= 0)
@@ -457,17 +467,19 @@ static int pinmux_config_gpio(struct pinmux_info *gpioc, unsigned gpio,
if (!in_range)
continue;
- if (get_config_reg(gpioc, enum_id, &cr, &index, &cntp) != 0)
+ if (get_config_reg(gpioc, enum_id, &cr,
+ &field, &value, &cntp) != 0)
goto out_err;
switch (cfg_mode) {
case GPIO_CFG_DRYRUN:
- if (!*cntp || !check_config_reg(gpioc, cr, index))
+ if (!*cntp ||
+ (read_config_reg(gpioc, cr, field) != value))
continue;
break;
case GPIO_CFG_REQ:
- write_config_reg(gpioc, cr, index);
+ write_config_reg(gpioc, cr, field, value);
*cntp = *cntp + 1;
break;
@@ -644,7 +656,7 @@ 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->mapped_reg, dr->reg_width, 1, bit, dr->reg);
+ return gpio_read_bit(dr, bit);
}
static int sh_gpio_get(struct gpio_chip *chip, unsigned offset)