#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/clk.h>
-
+#include <linux/bitops.h>
#include <linux/io.h>
#include <linux/cpufreq.h>
+#include <mach/common.h>
#include <mach/clock.h>
#include <mach/sram.h>
#include <asm/div64.h>
-#include <asm/bitops.h>
-#include "memory.h"
+#include <mach/sdrc.h>
#include "clock.h"
#include "clock24xx.h"
#include "prm.h"
static int omap2_enable_osc_ck(struct clk *clk)
{
- u32 pcc;
-
- pcc = __raw_readl(OMAP24XX_PRCM_CLKSRC_CTRL);
-
- __raw_writel(pcc & ~OMAP_AUTOEXTCLKMODE_MASK,
- OMAP24XX_PRCM_CLKSRC_CTRL);
+ prm_rmw_mod_reg_bits(OMAP_AUTOEXTCLKMODE_MASK, 0,
+ OMAP24XX_GR_MOD, OMAP24XX_PRCM_CLKSRC_CTRL_OFFSET);
return 0;
}
static void omap2_disable_osc_ck(struct clk *clk)
{
- u32 pcc;
-
- pcc = __raw_readl(OMAP24XX_PRCM_CLKSRC_CTRL);
-
- __raw_writel(pcc | OMAP_AUTOEXTCLKMODE_MASK,
- OMAP24XX_PRCM_CLKSRC_CTRL);
+ prm_rmw_mod_reg_bits(OMAP_AUTOEXTCLKMODE_MASK, OMAP_AUTOEXTCLKMODE_MASK,
+ OMAP24XX_GR_MOD, OMAP24XX_PRCM_CLKSRC_CTRL_OFFSET);
}
-#ifdef OLD_CK
-/* Recalculate SYST_CLK */
-static void omap2_sys_clk_recalc(struct clk * clk)
-{
- u32 div = PRCM_CLKSRC_CTRL;
- div &= (1 << 7) | (1 << 6); /* Test if ext clk divided by 1 or 2 */
- div >>= clk->rate_offset;
- clk->rate = (clk->parent->rate / div);
- propagate_rate(clk);
-}
-#endif /* OLD_CK */
-
/* Enable an APLL if off */
static int omap2_clk_fixed_enable(struct clk *clk)
{
u32 cval, apll_mask;
+ void __iomem *idlest;
apll_mask = EN_APLL_LOCKED << clk->enable_bit;
else if (clk == &apll54_ck)
cval = OMAP24XX_ST_54M_APLL;
- omap2_wait_clock_ready(OMAP_CM_REGADDR(PLL_MOD, CM_IDLEST), cval,
- clk->name);
+ if (cpu_is_omap242x())
+ idlest = (__force void __iomem *)OMAP2420_CM_REGADDR(PLL_MOD,
+ CM_IDLEST);
+ else
+ idlest = (__force void __iomem *)OMAP2430_CM_REGADDR(PLL_MOD,
+ CM_IDLEST);
+
+ omap2_wait_clock_ready(idlest, cval, clk->name);
/*
* REVISIT: Should we return an error code if omap2_wait_clock_ready()
* Uses the current prcm set to tell if a rate is valid.
* You can go slower, but not faster within a given rate set.
*/
-long omap2_dpllcore_round_rate(unsigned long target_rate)
+static long omap2_dpllcore_round_rate(unsigned long target_rate)
{
u32 high, low, core_clk_src;
mult &= OMAP24XX_CORE_CLK_SRC_MASK;
if ((rate == (cur_rate / 2)) && (mult == 2)) {
- omap2_reprogram_sdrc(CORE_CLK_SRC_DPLL, 1);
+ omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL, 1);
} else if ((rate == (cur_rate * 2)) && (mult == 1)) {
- omap2_reprogram_sdrc(CORE_CLK_SRC_DPLL_X2, 1);
+ omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL_X2, 1);
} else if (rate != cur_rate) {
valid_rate = omap2_dpllcore_round_rate(rate);
if (valid_rate != rate)
if (rate == curr_prcm_set->xtal_speed) /* If asking for 1-1 */
bypass = 1;
- omap2_reprogram_sdrc(CORE_CLK_SRC_DPLL_X2, 1); /* For init_mem */
+ /* For omap2xxx_sdrc_init_params() */
+ omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL_X2, 1);
/* Force dll lock mode */
omap2_set_prcm(tmpset.cm_clksel1_pll, tmpset.base_sdrc_rfr,
bypass);
/* Errata: ret dll entry state */
- omap2_init_memory_params(omap2_dll_force_needed());
- omap2_reprogram_sdrc(done_rate, 0);
+ omap2xxx_sdrc_init_params(omap2xxx_sdrc_dll_is_unlocked());
+ omap2xxx_sdrc_reprogram(done_rate, 0);
}
omap2_dpllcore_recalc(&dpll_ck);
ret = 0;
cur_rate = omap2_get_dpll_rate_24xx(&dpll_ck);
if (prcm->dpll_speed == cur_rate / 2) {
- omap2_reprogram_sdrc(CORE_CLK_SRC_DPLL, 1);
+ omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL, 1);
} else if (prcm->dpll_speed == cur_rate * 2) {
- omap2_reprogram_sdrc(CORE_CLK_SRC_DPLL_X2, 1);
+ omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL_X2, 1);
} else if (prcm->dpll_speed != cur_rate) {
local_irq_save(flags);
/* Major subsystem dividers */
tmp = cm_read_mod_reg(CORE_MOD, CM_CLKSEL1) & OMAP24XX_CLKSEL_DSS2_MASK;
- cm_write_mod_reg(prcm->cm_clksel1_core | tmp, CORE_MOD, CM_CLKSEL1);
+ cm_write_mod_reg(prcm->cm_clksel1_core | tmp, CORE_MOD,
+ CM_CLKSEL1);
+
if (cpu_is_omap2430())
cm_write_mod_reg(prcm->cm_clksel_mdm,
OMAP2430_MDM_MOD, CM_CLKSEL);
- /* x2 to enter init_mem */
- omap2_reprogram_sdrc(CORE_CLK_SRC_DPLL_X2, 1);
+ /* x2 to enter omap2xxx_sdrc_init_params() */
+ omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL_X2, 1);
omap2_set_prcm(prcm->cm_clksel1_pll, prcm->base_sdrc_rfr,
bypass);
- omap2_init_memory_params(omap2_dll_force_needed());
- omap2_reprogram_sdrc(done_rate, 0);
+ omap2xxx_sdrc_init_params(omap2xxx_sdrc_dll_is_unlocked());
+ omap2xxx_sdrc_reprogram(done_rate, 0);
local_irq_restore(flags);
}
return 0;
}
+#ifdef CONFIG_CPU_FREQ
+/*
+ * Walk PRCM rate table and fillout cpufreq freq_table
+ */
+static struct cpufreq_frequency_table freq_table[ARRAY_SIZE(rate_table)];
+
+void omap2_clk_init_cpufreq_table(struct cpufreq_frequency_table **table)
+{
+ struct prcm_config *prcm;
+ int i = 0;
+
+ for (prcm = rate_table; prcm->mpu_speed; prcm++) {
+ if (!(prcm->flags & cpu_mask))
+ continue;
+ if (prcm->xtal_speed != sys_ck.rate)
+ continue;
+
+ /* don't put bypass rates in table */
+ if (prcm->dpll_speed == prcm->xtal_speed)
+ continue;
+
+ freq_table[i].index = i;
+ freq_table[i].frequency = prcm->mpu_speed / 1000;
+ i++;
+ }
+
+ if (i == 0) {
+ printk(KERN_WARNING "%s: failed to initialize frequency "
+ "table\n", __func__);
+ return;
+ }
+
+ freq_table[i].index = i;
+ freq_table[i].frequency = CPUFREQ_TABLE_END;
+
+ *table = &freq_table[0];
+}
+#endif
+
static struct clk_functions omap2_clk_functions = {
.clk_enable = omap2_clk_enable,
.clk_disable = omap2_clk_disable,
.clk_set_rate = omap2_clk_set_rate,
.clk_set_parent = omap2_clk_set_parent,
.clk_disable_unused = omap2_clk_disable_unused,
+#ifdef CONFIG_CPU_FREQ
+ .clk_init_cpufreq_table = omap2_clk_init_cpufreq_table,
+#endif
};
static u32 omap2_get_apll_clkin(void)
{
- u32 aplls, sclk = 0;
+ u32 aplls, srate = 0;
aplls = cm_read_mod_reg(PLL_MOD, CM_CLKSEL1);
aplls &= OMAP24XX_APLLS_CLKIN_MASK;
aplls >>= OMAP24XX_APLLS_CLKIN_SHIFT;
if (aplls == APLLS_CLKIN_19_2MHZ)
- sclk = 19200000;
+ srate = 19200000;
else if (aplls == APLLS_CLKIN_13MHZ)
- sclk = 13000000;
+ srate = 13000000;
else if (aplls == APLLS_CLKIN_12MHZ)
- sclk = 12000000;
+ srate = 12000000;
- return sclk;
+ return srate;
}
static u32 omap2_get_sysclkdiv(void)
{
u32 div;
- div = __raw_readl(OMAP24XX_PRCM_CLKSRC_CTRL);
+ div = prm_read_mod_reg(OMAP24XX_GR_MOD,
+ OMAP24XX_PRCM_CLKSRC_CTRL_OFFSET);
div &= OMAP_SYSCLKDIV_MASK;
div >>= OMAP_SYSCLKDIV_SHIFT;
}
arch_initcall(omap2_clk_arch_init);
+static u32 prm_base;
+static u32 cm_base;
+
+/*
+ * Since we share clock data for 242x and 243x, we need to rewrite some
+ * some register base offsets. Assume offset is at prm_base if flagged,
+ * else assume it's cm_base.
+ */
+static inline void omap2_clk_check_reg(u32 flags, void __iomem **reg)
+{
+ u32 tmp = (__force u32)*reg;
+
+ if ((tmp >> 24) != 0)
+ return;
+
+ if (flags & OFFSET_GR_MOD)
+ tmp += prm_base;
+ else
+ tmp += cm_base;
+
+ *reg = (__force void __iomem *)tmp;
+}
+
+static void __init omap2_clk_rewrite_base(struct clk *clk)
+{
+ omap2_clk_check_reg(clk->flags, &clk->clksel_reg);
+ omap2_clk_check_reg(clk->flags, &clk->enable_reg);
+ if (clk->dpll_data)
+ omap2_clk_check_reg(0, &clk->dpll_data->mult_div1_reg);
+}
+
int __init omap2_clk_init(void)
{
struct prcm_config *prcm;
else if (cpu_is_omap2430())
cpu_mask = RATE_IN_243X;
+ for (clkp = onchip_24xx_clks;
+ clkp < onchip_24xx_clks + ARRAY_SIZE(onchip_24xx_clks);
+ clkp++) {
+ omap2_clk_rewrite_base(*clkp);
+ }
+
clk_init(&omap2_clk_functions);
omap2_osc_clk_recalc(&osc_ck);
if ((*clkp)->flags & CLOCK_IN_OMAP242X && cpu_is_omap2420()) {
clk_register(*clkp);
+ omap2_init_clk_clkdm(*clkp);
continue;
}
if ((*clkp)->flags & CLOCK_IN_OMAP243X && cpu_is_omap2430()) {
clk_register(*clkp);
+ omap2_init_clk_clkdm(*clkp);
continue;
}
}
return 0;
}
+
+void __init omap2_set_globals_clock24xx(struct omap_globals *omap2_globals)
+{
+ prm_base = (__force u32)omap2_globals->prm;
+ cm_base = (__force u32)omap2_globals->cm;
+}
projects / linux-2.6-omap-h63xx.git / blobdiff