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-rw-r--r--drivers/sh/clk/core.c9
-rw-r--r--drivers/sh/clk/cpg.c77
-rw-r--r--drivers/sh/pfc.c273
3 files changed, 250 insertions, 109 deletions
diff --git a/drivers/sh/clk/core.c b/drivers/sh/clk/core.c
index db257a35e71..7715de2629c 100644
--- a/drivers/sh/clk/core.c
+++ b/drivers/sh/clk/core.c
@@ -355,7 +355,7 @@ static int clk_establish_mapping(struct clk *clk)
*/
if (!clk->parent) {
clk->mapping = &dummy_mapping;
- return 0;
+ goto out;
}
/*
@@ -384,6 +384,9 @@ static int clk_establish_mapping(struct clk *clk)
}
clk->mapping = mapping;
+out:
+ clk->mapped_reg = clk->mapping->base;
+ clk->mapped_reg += (phys_addr_t)clk->enable_reg - clk->mapping->phys;
return 0;
}
@@ -402,10 +405,12 @@ static void clk_teardown_mapping(struct clk *clk)
/* Nothing to do */
if (mapping == &dummy_mapping)
- return;
+ goto out;
kref_put(&mapping->ref, clk_destroy_mapping);
clk->mapping = NULL;
+out:
+ clk->mapped_reg = NULL;
}
int clk_register(struct clk *clk)
diff --git a/drivers/sh/clk/cpg.c b/drivers/sh/clk/cpg.c
index 82dd6fb1783..a0d8faa40ba 100644
--- a/drivers/sh/clk/cpg.c
+++ b/drivers/sh/clk/cpg.c
@@ -15,15 +15,15 @@
static int sh_clk_mstp32_enable(struct clk *clk)
{
- __raw_writel(__raw_readl(clk->enable_reg) & ~(1 << clk->enable_bit),
- clk->enable_reg);
+ iowrite32(ioread32(clk->mapped_reg) & ~(1 << clk->enable_bit),
+ clk->mapped_reg);
return 0;
}
static void sh_clk_mstp32_disable(struct clk *clk)
{
- __raw_writel(__raw_readl(clk->enable_reg) | (1 << clk->enable_bit),
- clk->enable_reg);
+ iowrite32(ioread32(clk->mapped_reg) | (1 << clk->enable_bit),
+ clk->mapped_reg);
}
static struct clk_ops sh_clk_mstp32_clk_ops = {
@@ -72,7 +72,7 @@ static unsigned long sh_clk_div6_recalc(struct clk *clk)
clk_rate_table_build(clk, clk->freq_table, table->nr_divisors,
table, NULL);
- idx = __raw_readl(clk->enable_reg) & 0x003f;
+ idx = ioread32(clk->mapped_reg) & 0x003f;
return clk->freq_table[idx].frequency;
}
@@ -98,10 +98,10 @@ static int sh_clk_div6_set_parent(struct clk *clk, struct clk *parent)
if (ret < 0)
return ret;
- value = __raw_readl(clk->enable_reg) &
+ value = ioread32(clk->mapped_reg) &
~(((1 << clk->src_width) - 1) << clk->src_shift);
- __raw_writel(value | (i << clk->src_shift), clk->enable_reg);
+ iowrite32(value | (i << clk->src_shift), clk->mapped_reg);
/* Rebuild the frequency table */
clk_rate_table_build(clk, clk->freq_table, table->nr_divisors,
@@ -119,10 +119,10 @@ static int sh_clk_div6_set_rate(struct clk *clk, unsigned long rate)
if (idx < 0)
return idx;
- value = __raw_readl(clk->enable_reg);
+ value = ioread32(clk->mapped_reg);
value &= ~0x3f;
value |= idx;
- __raw_writel(value, clk->enable_reg);
+ iowrite32(value, clk->mapped_reg);
return 0;
}
@@ -133,9 +133,9 @@ static int sh_clk_div6_enable(struct clk *clk)
ret = sh_clk_div6_set_rate(clk, clk->rate);
if (ret == 0) {
- value = __raw_readl(clk->enable_reg);
+ value = ioread32(clk->mapped_reg);
value &= ~0x100; /* clear stop bit to enable clock */
- __raw_writel(value, clk->enable_reg);
+ iowrite32(value, clk->mapped_reg);
}
return ret;
}
@@ -144,10 +144,10 @@ static void sh_clk_div6_disable(struct clk *clk)
{
unsigned long value;
- value = __raw_readl(clk->enable_reg);
+ value = ioread32(clk->mapped_reg);
value |= 0x100; /* stop clock */
value |= 0x3f; /* VDIV bits must be non-zero, overwrite divider */
- __raw_writel(value, clk->enable_reg);
+ iowrite32(value, clk->mapped_reg);
}
static struct clk_ops sh_clk_div6_clk_ops = {
@@ -167,6 +167,38 @@ static struct clk_ops sh_clk_div6_reparent_clk_ops = {
.set_parent = sh_clk_div6_set_parent,
};
+static int __init sh_clk_init_parent(struct clk *clk)
+{
+ u32 val;
+
+ if (clk->parent)
+ return 0;
+
+ if (!clk->parent_table || !clk->parent_num)
+ return 0;
+
+ if (!clk->src_width) {
+ pr_err("sh_clk_init_parent: cannot select parent clock\n");
+ return -EINVAL;
+ }
+
+ val = (ioread32(clk->mapped_reg) >> clk->src_shift);
+ val &= (1 << clk->src_width) - 1;
+
+ if (val >= clk->parent_num) {
+ pr_err("sh_clk_init_parent: parent table size failed\n");
+ return -EINVAL;
+ }
+
+ clk->parent = clk->parent_table[val];
+ if (!clk->parent) {
+ pr_err("sh_clk_init_parent: unable to set parent");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static int __init sh_clk_div6_register_ops(struct clk *clks, int nr,
struct clk_ops *ops)
{
@@ -190,6 +222,9 @@ static int __init sh_clk_div6_register_ops(struct clk *clks, int nr,
clkp->ops = ops;
clkp->freq_table = freq_table + (k * freq_table_size);
clkp->freq_table[nr_divs].frequency = CPUFREQ_TABLE_END;
+ ret = sh_clk_init_parent(clkp);
+ if (ret < 0)
+ break;
ret = clk_register(clkp);
}
@@ -217,7 +252,7 @@ static unsigned long sh_clk_div4_recalc(struct clk *clk)
clk_rate_table_build(clk, clk->freq_table, table->nr_divisors,
table, &clk->arch_flags);
- idx = (__raw_readl(clk->enable_reg) >> clk->enable_bit) & 0x000f;
+ idx = (ioread32(clk->mapped_reg) >> clk->enable_bit) & 0x000f;
return clk->freq_table[idx].frequency;
}
@@ -235,15 +270,15 @@ static int sh_clk_div4_set_parent(struct clk *clk, struct clk *parent)
*/
if (parent->flags & CLK_ENABLE_ON_INIT)
- value = __raw_readl(clk->enable_reg) & ~(1 << 7);
+ value = ioread32(clk->mapped_reg) & ~(1 << 7);
else
- value = __raw_readl(clk->enable_reg) | (1 << 7);
+ value = ioread32(clk->mapped_reg) | (1 << 7);
ret = clk_reparent(clk, parent);
if (ret < 0)
return ret;
- __raw_writel(value, clk->enable_reg);
+ iowrite32(value, clk->mapped_reg);
/* Rebiuld the frequency table */
clk_rate_table_build(clk, clk->freq_table, table->nr_divisors,
@@ -260,10 +295,10 @@ static int sh_clk_div4_set_rate(struct clk *clk, unsigned long rate)
if (idx < 0)
return idx;
- value = __raw_readl(clk->enable_reg);
+ value = ioread32(clk->mapped_reg);
value &= ~(0xf << clk->enable_bit);
value |= (idx << clk->enable_bit);
- __raw_writel(value, clk->enable_reg);
+ iowrite32(value, clk->mapped_reg);
if (d4t->kick)
d4t->kick(clk);
@@ -273,13 +308,13 @@ static int sh_clk_div4_set_rate(struct clk *clk, unsigned long rate)
static int sh_clk_div4_enable(struct clk *clk)
{
- __raw_writel(__raw_readl(clk->enable_reg) & ~(1 << 8), clk->enable_reg);
+ iowrite32(ioread32(clk->mapped_reg) & ~(1 << 8), clk->mapped_reg);
return 0;
}
static void sh_clk_div4_disable(struct clk *clk)
{
- __raw_writel(__raw_readl(clk->enable_reg) | (1 << 8), clk->enable_reg);
+ iowrite32(ioread32(clk->mapped_reg) | (1 << 8), clk->mapped_reg);
}
static struct clk_ops sh_clk_div4_clk_ops = {
diff --git a/drivers/sh/pfc.c b/drivers/sh/pfc.c
index e67fe170d8d..522c6c46d1b 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)
{
@@ -31,41 +100,54 @@ 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;
}
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)
{
@@ -82,53 +164,72 @@ 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 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;
+
+ *mapped_regp = pfc_phys_to_virt(gpioc, crp->reg);
- data = 0;
- mask = (1 << field_width) - 1;
- pos = reg_width - ((in_pos + 1) * field_width);
+ 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];
+ }
+}
- pr_debug("read_reg: addr = %lx, pos = %ld, "
+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(reg, reg_width);
- return (data >> pos) & mask;
+ return (gpio_read_raw_reg(mapped_reg, crp->reg_width) >> pos) & mask;
}
-static void gpio_write_reg(unsigned long reg, unsigned long reg_width,
- unsigned long field_width, unsigned long in_pos,
- unsigned long value)
+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:
- __raw_writeb((__raw_readb(reg) & mask) | value, reg);
- break;
- case 16:
- __raw_writew((__raw_readw(reg) & mask) | value, reg);
- break;
- case 32:
- __raw_writel((__raw_readl(reg) & mask) | value, 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)
@@ -147,6 +248,8 @@ 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 +282,8 @@ 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++;
}
}
@@ -201,12 +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) {
@@ -217,13 +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++;
}
@@ -261,36 +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;
-
- ncomb = 1 << crp->field_width;
- pos = index / ncomb;
- value = index % ncomb;
-
- gpio_write_reg(crp->reg, crp->reg_width, crp->field_width, pos, value);
-}
-
-static int check_config_reg(struct pinmux_info *gpioc,
- struct pinmux_cfg_reg *crp,
- int index)
-{
- unsigned long ncomb, pos, value;
-
- 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)
- 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,
@@ -299,7 +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) {
@@ -330,7 +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)
@@ -377,17 +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;
@@ -564,7 +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->reg, dr->reg_width, 1, bit);
+ return gpio_read_bit(dr, bit);
}
static int sh_gpio_get(struct gpio_chip *chip, unsigned offset)
@@ -606,10 +698,15 @@ 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 +724,16 @@ 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);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-19 01:19:17 +0000