[PATCH] ARM: EXYNOS: Add audio I2S clock control
From: tobetter
Date: Mon Aug 13 2012 - 07:24:22 EST
From: Dongjin Kim <dongjin.kim@xxxxxxxxxxxxxxxxxxx>
This patch adds the clock controls for the audio subsystem channel 0,
and fixes invalid clock gating for i2s.0.
Signed-off-by: Dongjin Kim <dongjin.kim@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-exynos/clock-exynos4.c | 254 +++++++++++++++++++++++-
arch/arm/mach-exynos/common.c | 5 +
arch/arm/mach-exynos/include/mach/map.h | 2 +
arch/arm/mach-exynos/include/mach/regs-audss.h | 6 +
arch/arm/plat-samsung/include/plat/map-s5p.h | 2 +
5 files changed, 263 insertions(+), 6 deletions(-)
diff --git a/arch/arm/mach-exynos/clock-exynos4.c b/arch/arm/mach-exynos/clock-exynos4.c
index 2dc96f4..a3478db 100644
--- a/arch/arm/mach-exynos/clock-exynos4.c
+++ b/arch/arm/mach-exynos/clock-exynos4.c
@@ -24,6 +24,7 @@
#include <mach/map.h>
#include <mach/regs-clock.h>
+#include <mach/regs-audss.h>
#include <mach/sysmmu.h>
#include "common.h"
@@ -198,6 +199,11 @@ static int exynos4_clk_ip_perir_ctrl(struct clk *clk, int enable)
return s5p_gatectrl(EXYNOS4_CLKGATE_IP_PERIR, clk, enable);
}
+static int exynos4_clk_vpll_ctrl(struct clk *clk, int enable)
+{
+ return s5p_gatectrl(EXYNOS4_VPLL_CON0, clk, enable);
+}
+
int exynos4_clk_ip_dmc_ctrl(struct clk *clk, int enable)
{
return s5p_gatectrl(EXYNOS4_CLKGATE_IP_DMC, clk, enable);
@@ -213,6 +219,16 @@ static int exynos4_clk_dac_ctrl(struct clk *clk, int enable)
return s5p_gatectrl(S5P_DAC_PHY_CONTROL, clk, enable);
}
+static int exynos4_clksrc_mask_maudio_ctrl(struct clk *clk, int enable)
+{
+ return s5p_gatectrl(EXYNOS4_CLKSRC_MASK_MAUDIO, clk, enable);
+}
+
+int exynos4_clk_audss_ctrl(struct clk *clk, int enable)
+{
+ return s5p_gatectrl(S5P_CLKGATE_AUDSS, clk, enable);
+}
+
/* Core list of CMU_CPU side */
static struct clksrc_clk exynos4_clk_mout_apll = {
@@ -451,6 +467,25 @@ static struct clksrc_sources exynos4_clkset_sclk_vpll = {
.nr_sources = ARRAY_SIZE(exynos4_clkset_sclk_vpll_list),
};
+static struct clk *exynos4_clkset_mout_audss_list[] = {
+ &clk_ext_xtal_mux,
+ &clk_fout_epll,
+};
+
+static struct clksrc_sources clkset_mout_audss = {
+ .sources = exynos4_clkset_mout_audss_list,
+ .nr_sources = ARRAY_SIZE(exynos4_clkset_mout_audss_list),
+};
+
+static struct clksrc_clk exynos4_clk_mout_audss = {
+ .clk = {
+ .name = "mout_audss",
+ },
+ .sources = &clkset_mout_audss,
+ .reg_src = { .reg = S5P_CLKSRC_AUDSS, .shift = 0, .size = 1 },
+};
+
+
static struct clksrc_clk exynos4_clk_sclk_vpll = {
.clk = {
.name = "sclk_vpll",
@@ -459,6 +494,43 @@ static struct clksrc_clk exynos4_clk_sclk_vpll = {
.reg_src = { .reg = EXYNOS4_CLKSRC_TOP0, .shift = 8, .size = 1 },
};
+static struct clksrc_clk exynos4_clk_dout_audss_srp = {
+ .clk = {
+ .name = "dout_srp",
+ .parent = &exynos4_clk_mout_audss.clk,
+ },
+ .reg_div = { .reg = S5P_CLKDIV_AUDSS, .shift = 0, .size = 4 },
+};
+
+static struct clksrc_clk exynos4_clk_sclk_audss_bus = {
+ .clk = {
+ .name = "busclk",
+ .parent = &exynos4_clk_dout_audss_srp.clk,
+ .enable = exynos4_clk_audss_ctrl,
+ .ctrlbit = (1 << 2),
+ },
+ .reg_div = { .reg = S5P_CLKDIV_AUDSS, .shift = 4, .size = 4 },
+};
+
+static struct clk exynos4_init_audss_clocks[] = {
+ {
+ .name = "srpclk",
+ .enable = exynos4_clk_audss_ctrl,
+ .parent = &exynos4_clk_dout_audss_srp.clk,
+ .ctrlbit = (1 << 0),
+ }, {
+ .name = "iis",
+ .devname = "samsung-i2s.0",
+ .enable = exynos4_clk_audss_ctrl,
+ .ctrlbit = (1 << 3) | (1 << 2),
+ }, {
+ .name = "pcm",
+ .devname = "samsung-pcm.0",
+ .enable = exynos4_clk_audss_ctrl,
+ .ctrlbit = (1 << 5),
+ },
+};
+
static struct clk exynos4_init_clocks_off[] = {
{
.name = "timers",
@@ -601,11 +673,6 @@ static struct clk exynos4_init_clocks_off[] = {
.ctrlbit = (1 << 18),
}, {
.name = "iis",
- .devname = "samsung-i2s.0",
- .enable = exynos4_clk_ip_peril_ctrl,
- .ctrlbit = (1 << 19),
- }, {
- .name = "iis",
.devname = "samsung-i2s.1",
.enable = exynos4_clk_ip_peril_ctrl,
.ctrlbit = (1 << 20),
@@ -728,7 +795,65 @@ static struct clk exynos4_init_clocks_off[] = {
.devname = SYSMMU_CLOCK_DEVNAME(fimd0, 10),
.enable = exynos4_clk_ip_lcd0_ctrl,
.ctrlbit = (1 << 4),
- }
+ },
+};
+
+struct clksrc_clk exynos4_clk_audiocdclk0 = {
+ .clk = {
+ .name = "audiocdclk",
+ .rate = 16934400,
+ },
+};
+
+static struct clk *clkset_sclk_audio0_list[] = {
+ [0] = &exynos4_clk_audiocdclk0.clk,
+ [1] = NULL,
+ [2] = &exynos4_clk_sclk_hdmi27m,
+ [3] = &exynos4_clk_sclk_usbphy0,
+ [4] = &clk_ext_xtal_mux,
+ [5] = &clk_xusbxti,
+ [6] = &exynos4_clk_mout_mpll.clk,
+ [7] = &exynos4_clk_mout_epll.clk,
+ [8] = &exynos4_clk_sclk_vpll.clk,
+};
+
+static struct clksrc_sources exynos4_clkset_sclk_audio0 = {
+ .sources = clkset_sclk_audio0_list,
+ .nr_sources = ARRAY_SIZE(clkset_sclk_audio0_list),
+};
+
+static struct clksrc_clk exynos4_clk_sclk_audio0 = {
+ .clk = {
+ .name = "audio-bus",
+ .enable = exynos4_clksrc_mask_maudio_ctrl,
+ .ctrlbit = (1 << 0),
+ },
+ .sources = &exynos4_clkset_sclk_audio0,
+ .reg_src = { .reg = EXYNOS4_CLKSRC_MAUDIO, .shift = 0, .size = 4 },
+ .reg_div = { .reg = EXYNOS4_CLKDIV_MAUDIO, .shift = 0, .size = 4 },
+};
+
+static struct clk *exynos4_clkset_sclk_audss_list[] = {
+ &exynos4_clk_mout_audss.clk,
+ &exynos4_clk_audiocdclk0.clk,
+ &exynos4_clk_sclk_audio0.clk,
+};
+
+static struct clksrc_sources exynos4_clkset_sclk_audss = {
+ .sources = exynos4_clkset_sclk_audss_list,
+ .nr_sources = ARRAY_SIZE(exynos4_clkset_sclk_audss_list),
+};
+
+static struct clksrc_clk exynos4_clk_sclk_audss_i2s = {
+ .clk = {
+ .name = "i2sclk",
+ .parent = &exynos4_clk_mout_audss.clk,
+ .enable = exynos4_clk_audss_ctrl,
+ .ctrlbit = (1 << 3),
+ },
+ .sources = &exynos4_clkset_sclk_audss,
+ .reg_src = { .reg = S5P_CLKSRC_AUDSS, .shift = 2, .size = 2 },
+ .reg_div = { .reg = S5P_CLKDIV_AUDSS, .shift = 8, .size = 4 },
};
static struct clk exynos4_init_clocks_on[] = {
@@ -1271,6 +1396,14 @@ static struct clksrc_clk exynos4_clk_sclk_spi2 = {
.reg_div = { .reg = EXYNOS4_CLKDIV_PERIL2, .shift = 8, .size = 8 },
};
+static struct clksrc_clk exynos4_clk_sclk_pcm0 = {
+ .clk = {
+ .name = "sclk_pcm",
+ .parent = &exynos4_clk_sclk_audio0.clk,
+ },
+ .reg_div = { .reg = EXYNOS4_CLKDIV_MAUDIO, .shift = 4, .size = 8 },
+};
+
/* Clock initialization code */
static struct clksrc_clk *exynos4_sysclks[] = {
&exynos4_clk_mout_apll,
@@ -1303,6 +1436,13 @@ static struct clksrc_clk *exynos4_sysclks[] = {
&exynos4_clk_dout_mmc4,
&exynos4_clk_mout_mfc0,
&exynos4_clk_mout_mfc1,
+ &exynos4_clk_audiocdclk0,
+ &exynos4_clk_mout_audss,
+ &exynos4_clk_sclk_audss_bus,
+ &exynos4_clk_sclk_audss_i2s,
+ &exynos4_clk_dout_audss_srp,
+ &exynos4_clk_sclk_audio0,
+ &exynos4_clk_sclk_pcm0,
};
static struct clk *exynos4_clk_cdev[] = {
@@ -1430,6 +1570,92 @@ static struct clk_ops exynos4_vpll_ops = {
.set_rate = exynos4_vpll_set_rate,
};
+static unsigned long exynos4_epll_get_rate(struct clk *clk)
+{
+ return clk->rate;
+}
+
+static u32 epll_div[][6] = {
+ { 192000000, 0, 48, 3, 1, 0 },
+ { 180000000, 0, 45, 3, 1, 0 },
+ { 73728000, 1, 73, 3, 3, 47710 },
+ { 67737600, 1, 90, 4, 3, 20762 },
+ { 49152000, 0, 49, 3, 3, 9961 },
+ { 45158400, 0, 45, 3, 3, 10381 },
+ { 180633600, 0, 45, 3, 1, 10381 },
+};
+
+static int exynos4_epll_set_rate(struct clk *clk, unsigned long rate)
+{
+ unsigned int epll_con, epll_con_k;
+ unsigned int i;
+ unsigned int tmp;
+ unsigned int epll_rate;
+ unsigned int locktime;
+ unsigned int lockcnt;
+
+ /* Return if nothing changed */
+ if (clk->rate == rate)
+ return 0;
+
+ if (clk->parent)
+ epll_rate = clk_get_rate(clk->parent);
+ else
+ epll_rate = clk_ext_xtal_mux.rate;
+
+ if (epll_rate != 24000000) {
+ pr_err("Invalid Clock : recommended clock is 24MHz.\n");
+ return -EINVAL;
+ }
+
+
+ epll_con = __raw_readl(EXYNOS4_EPLL_CON0);
+ epll_con &= ~(0x1 << 27 | \
+ PLL46XX_MDIV_MASK << PLL46XX_MDIV_SHIFT | \
+ PLL46XX_PDIV_MASK << PLL46XX_PDIV_SHIFT | \
+ PLL46XX_SDIV_MASK << PLL46XX_SDIV_SHIFT);
+
+ for (i = 0; i < ARRAY_SIZE(epll_div); i++) {
+ if (epll_div[i][0] == rate) {
+ epll_con_k = epll_div[i][5] << 0;
+ epll_con |= epll_div[i][1] << 27;
+ epll_con |= epll_div[i][2] << PLL46XX_MDIV_SHIFT;
+ epll_con |= epll_div[i][3] << PLL46XX_PDIV_SHIFT;
+ epll_con |= epll_div[i][4] << PLL46XX_SDIV_SHIFT;
+ break;
+ }
+ }
+
+ if (i == ARRAY_SIZE(epll_div)) {
+ pr_err("%s: Invalid Clock EPLL Frequency\n", __func__);
+ return -EINVAL;
+ }
+
+ epll_rate /= 1000000;
+
+ /* 3000 max_cycls : specification data */
+ locktime = 3000 / epll_rate * epll_div[i][3];
+ lockcnt = locktime * 10000 / (10000 / epll_rate);
+
+ __raw_writel(lockcnt, EXYNOS4_EPLL_LOCK);
+
+ __raw_writel(epll_con, EXYNOS4_EPLL_CON0);
+ __raw_writel(epll_con_k, EXYNOS4_EPLL_CON1);
+
+ do {
+ tmp = __raw_readl(EXYNOS4_EPLL_CON0);
+ } while (!(tmp & 0x1 << EXYNOS4_EPLLCON0_LOCKED_SHIFT));
+
+ clk->rate = rate;
+
+ return 0;
+}
+
+static struct clk_ops exynos4_epll_ops = {
+ .get_rate = exynos4_epll_get_rate,
+ .set_rate = exynos4_epll_set_rate,
+};
+
void __init_or_cpufreq exynos4_setup_clocks(void)
{
struct clk *xtal_clk;
@@ -1486,6 +1712,7 @@ void __init_or_cpufreq exynos4_setup_clocks(void)
clk_fout_apll.ops = &exynos4_fout_apll_ops;
clk_fout_mpll.rate = mpll;
+ clk_fout_epll.ops = &exynos4_epll_ops;
clk_fout_epll.rate = epll;
clk_fout_vpll.ops = &exynos4_vpll_ops;
clk_fout_vpll.rate = vpll;
@@ -1510,6 +1737,16 @@ void __init_or_cpufreq exynos4_setup_clocks(void)
clk_h.rate = sclk_dmc;
clk_p.rate = aclk_100;
+ clk_set_parent(&exynos4_clk_mout_audss.clk, &clk_fout_epll);
+ clk_set_parent(&exynos4_clk_sclk_audio0.clk,
+ &exynos4_clk_mout_epll.clk);
+ clk_set_parent(&exynos4_clk_mout_epll.clk, &clk_fout_epll);
+
+ clk_fout_vpll.enable = exynos4_clk_vpll_ctrl;
+ clk_fout_vpll.ops = &exynos4_vpll_ops;
+
+ clk_set_rate(&exynos4_clk_sclk_apll.clk, 100000000);
+
for (ptr = 0; ptr < ARRAY_SIZE(exynos4_clksrcs); ptr++)
s3c_set_clksrc(&exynos4_clksrcs[ptr], true);
}
@@ -1569,6 +1806,11 @@ void __init exynos4_register_clocks(void)
s3c_disable_clocks(exynos4_init_clocks_off, ARRAY_SIZE(exynos4_init_clocks_off));
clkdev_add_table(exynos4_clk_lookup, ARRAY_SIZE(exynos4_clk_lookup));
+ s3c_register_clocks(exynos4_init_audss_clocks,
+ ARRAY_SIZE(exynos4_init_audss_clocks));
+ s3c_disable_clocks(exynos4_init_audss_clocks,
+ ARRAY_SIZE(exynos4_init_audss_clocks));
+
register_syscore_ops(&exynos4_clock_syscore_ops);
s3c24xx_register_clock(&dummy_apb_pclk);
diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index 94d58af..9450651 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -198,6 +198,11 @@ static struct map_desc exynos4_iodesc[] __initdata = {
.pfn = __phys_to_pfn(EXYNOS4_PA_HSPHY),
.length = SZ_4K,
.type = MT_DEVICE,
+ }, {
+ .virtual = (unsigned long)S5P_VA_AUDSS,
+ .pfn = __phys_to_pfn(EXYNOS4_PA_AUDSS),
+ .length = SZ_4K,
+ .type = MT_DEVICE,
},
};
diff --git a/arch/arm/mach-exynos/include/mach/map.h b/arch/arm/mach-exynos/include/mach/map.h
index c72b675..2f8a16f 100644
--- a/arch/arm/mach-exynos/include/mach/map.h
+++ b/arch/arm/mach-exynos/include/mach/map.h
@@ -34,6 +34,8 @@
#define EXYNOS4_PA_JPEG 0x11840000
+#define EXYNOS4_PA_AUDSS 0x03810000
+
/* x = 0...1 */
#define EXYNOS4_PA_FIMC_LITE(x) (0x12390000 + ((x) * 0x10000))
diff --git a/arch/arm/mach-exynos/include/mach/regs-audss.h b/arch/arm/mach-exynos/include/mach/regs-audss.h
index ca5a8b6..e75b959 100644
--- a/arch/arm/mach-exynos/include/mach/regs-audss.h
+++ b/arch/arm/mach-exynos/include/mach/regs-audss.h
@@ -15,4 +15,10 @@
#define EXYNOS4_AUDSS_INT_MEM (0x03000000)
+#define EXYNOS4_AUDSSREG(x) (S5P_VA_AUDSS + (x))
+
+#define S5P_CLKSRC_AUDSS EXYNOS4_AUDSSREG(0x0)
+#define S5P_CLKDIV_AUDSS EXYNOS4_AUDSSREG(0x4)
+#define S5P_CLKGATE_AUDSS EXYNOS4_AUDSSREG(0x8)
+
#endif /* _PLAT_REGS_AUDSS_H */
diff --git a/arch/arm/plat-samsung/include/plat/map-s5p.h b/arch/arm/plat-samsung/include/plat/map-s5p.h
index c2d7bda..3558277 100644
--- a/arch/arm/plat-samsung/include/plat/map-s5p.h
+++ b/arch/arm/plat-samsung/include/plat/map-s5p.h
@@ -40,6 +40,8 @@
#define S5P_VA_GIC_CPU S3C_ADDR(0x02810000)
#define S5P_VA_GIC_DIST S3C_ADDR(0x02820000)
+#define S5P_VA_AUDSS S3C_ADDR(0x02910000)
+
#define VA_VIC(x) (S3C_VA_IRQ + ((x) * 0x10000))
#define VA_VIC0 VA_VIC(0)
#define VA_VIC1 VA_VIC(1)
--
1.7.9.5
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