* Copyright (C) 2010 Samsung Electronics
* Minkyu Kang <mk7.kang@samsung.com>
*
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/clk.h>
+#include <asm/arch/periph.h>
+
+#define PLL_DIV_1024 1024
+#define PLL_DIV_65535 65535
+#define PLL_DIV_65536 65536
+
+/* *
+ * This structure is to store the src bit, div bit and prediv bit
+ * positions of the peripheral clocks of the src and div registers
+ */
+struct clk_bit_info {
+ int8_t src_bit;
+ int8_t div_bit;
+ int8_t prediv_bit;
+};
+
+/* src_bit div_bit prediv_bit */
+static struct clk_bit_info clk_bit_info[PERIPH_ID_COUNT] = {
+ {0, 0, -1},
+ {4, 4, -1},
+ {8, 8, -1},
+ {12, 12, -1},
+ {0, 0, 8},
+ {4, 16, 24},
+ {8, 0, 8},
+ {12, 16, 24},
+ {-1, -1, -1},
+ {16, 0, 8},
+ {20, 16, 24},
+ {24, 0, 8},
+ {0, 0, 4},
+ {4, 12, 16},
+ {-1, -1, -1},
+ {-1, -1, -1},
+ {-1, 24, 0},
+ {-1, 24, 0},
+ {-1, 24, 0},
+ {-1, 24, 0},
+ {-1, 24, 0},
+ {-1, 24, 0},
+ {-1, 24, 0},
+ {-1, 24, 0},
+ {24, 0, -1},
+ {24, 0, -1},
+ {24, 0, -1},
+ {24, 0, -1},
+ {24, 0, -1},
+};
+
+/* Epll Clock division values to achive different frequency output */
+static struct set_epll_con_val exynos5_epll_div[] = {
+ { 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 }
+};
+
+/* exynos: return pll clock frequency */
+static int exynos_get_pll_clk(int pllreg, unsigned int r, unsigned int k)
+{
+ unsigned long m, p, s = 0, mask, fout;
+ unsigned int div;
+ unsigned int freq;
+ /*
+ * APLL_CON: MIDV [25:16]
+ * MPLL_CON: MIDV [25:16]
+ * EPLL_CON: MIDV [24:16]
+ * VPLL_CON: MIDV [24:16]
+ * BPLL_CON: MIDV [25:16]: Exynos5
+ */
+ if (pllreg == APLL || pllreg == MPLL || pllreg == BPLL)
+ mask = 0x3ff;
+ else
+ mask = 0x1ff;
+
+ m = (r >> 16) & mask;
+
+ /* PDIV [13:8] */
+ p = (r >> 8) & 0x3f;
+ /* SDIV [2:0] */
+ s = r & 0x7;
+
+ freq = CONFIG_SYS_CLK_FREQ;
+
+ if (pllreg == EPLL) {
+ k = k & 0xffff;
+ /* FOUT = (MDIV + K / 65536) * FIN / (PDIV * 2^SDIV) */
+ fout = (m + k / PLL_DIV_65536) * (freq / (p * (1 << s)));
+ } else if (pllreg == VPLL) {
+ k = k & 0xfff;
+
+ /*
+ * Exynos4210
+ * FOUT = (MDIV + K / 1024) * FIN / (PDIV * 2^SDIV)
+ *
+ * Exynos4412
+ * FOUT = (MDIV + K / 65535) * FIN / (PDIV * 2^SDIV)
+ *
+ * Exynos5250
+ * FOUT = (MDIV + K / 65536) * FIN / (PDIV * 2^SDIV)
+ */
+ if (proid_is_exynos4210())
+ div = PLL_DIV_1024;
+ else if (proid_is_exynos4412())
+ div = PLL_DIV_65535;
+ else if (proid_is_exynos5250())
+ div = PLL_DIV_65536;
+ else
+ return 0;
+
+ fout = (m + k / div) * (freq / (p * (1 << s)));
+ } else {
+ /*
+ * Exynos4412 / Exynos5250
+ * FOUT = MDIV * FIN / (PDIV * 2^SDIV)
+ *
+ * Exynos4210
+ * FOUT = MDIV * FIN / (PDIV * 2^(SDIV-1))
+ */
+ if (proid_is_exynos4210())
+ fout = m * (freq / (p * (1 << (s - 1))));
+ else
+ fout = m * (freq / (p * (1 << s)));
+ }
+ return fout;
+}
/* exynos4: return pll clock frequency */
static unsigned long exynos4_get_pll_clk(int pllreg)
{
struct exynos4_clock *clk =
(struct exynos4_clock *)samsung_get_base_clock();
- unsigned long r, m, p, s, k = 0, mask, fout;
- unsigned int freq;
+ unsigned long r, k = 0;
switch (pllreg) {
case APLL:
return 0;
}
- /*
- * APLL_CON: MIDV [25:16]
- * MPLL_CON: MIDV [25:16]
- * EPLL_CON: MIDV [24:16]
- * VPLL_CON: MIDV [24:16]
- */
- if (pllreg == APLL || pllreg == MPLL)
- mask = 0x3ff;
- else
- mask = 0x1ff;
-
- m = (r >> 16) & mask;
-
- /* PDIV [13:8] */
- p = (r >> 8) & 0x3f;
- /* SDIV [2:0] */
- s = r & 0x7;
+ return exynos_get_pll_clk(pllreg, r, k);
+}
- freq = CONFIG_SYS_CLK_FREQ;
+/* exynos4x12: return pll clock frequency */
+static unsigned long exynos4x12_get_pll_clk(int pllreg)
+{
+ struct exynos4x12_clock *clk =
+ (struct exynos4x12_clock *)samsung_get_base_clock();
+ unsigned long r, k = 0;
- if (pllreg == EPLL) {
- k = k & 0xffff;
- /* FOUT = (MDIV + K / 65536) * FIN / (PDIV * 2^SDIV) */
- fout = (m + k / 65536) * (freq / (p * (1 << s)));
- } else if (pllreg == VPLL) {
- k = k & 0xfff;
- /* FOUT = (MDIV + K / 1024) * FIN / (PDIV * 2^SDIV) */
- fout = (m + k / 1024) * (freq / (p * (1 << s)));
- } else {
- if (s < 1)
- s = 1;
- /* FOUT = MDIV * FIN / (PDIV * 2^(SDIV - 1)) */
- fout = m * (freq / (p * (1 << (s - 1))));
+ switch (pllreg) {
+ case APLL:
+ r = readl(&clk->apll_con0);
+ break;
+ case MPLL:
+ r = readl(&clk->mpll_con0);
+ break;
+ case EPLL:
+ r = readl(&clk->epll_con0);
+ k = readl(&clk->epll_con1);
+ break;
+ case VPLL:
+ r = readl(&clk->vpll_con0);
+ k = readl(&clk->vpll_con1);
+ break;
+ default:
+ printf("Unsupported PLL (%d)\n", pllreg);
+ return 0;
}
- return fout;
+ return exynos_get_pll_clk(pllreg, r, k);
}
/* exynos5: return pll clock frequency */
{
struct exynos5_clock *clk =
(struct exynos5_clock *)samsung_get_base_clock();
- unsigned long r, m, p, s, k = 0, mask, fout;
- unsigned int freq;
+ unsigned long r, k = 0, fout;
+ unsigned int pll_div2_sel, fout_sel;
switch (pllreg) {
case APLL:
r = readl(&clk->vpll_con0);
k = readl(&clk->vpll_con1);
break;
+ case BPLL:
+ r = readl(&clk->bpll_con0);
+ break;
default:
printf("Unsupported PLL (%d)\n", pllreg);
return 0;
}
- /*
- * APLL_CON: MIDV [25:16]
- * MPLL_CON: MIDV [25:16]
- * EPLL_CON: MIDV [24:16]
- * VPLL_CON: MIDV [24:16]
- */
- if (pllreg == APLL || pllreg == MPLL)
- mask = 0x3ff;
- else
- mask = 0x1ff;
-
- m = (r >> 16) & mask;
+ fout = exynos_get_pll_clk(pllreg, r, k);
- /* PDIV [13:8] */
- p = (r >> 8) & 0x3f;
- /* SDIV [2:0] */
- s = r & 0x7;
+ /* According to the user manual, in EVT1 MPLL and BPLL always gives
+ * 1.6GHz clock, so divide by 2 to get 800MHz MPLL clock.*/
+ if (pllreg == MPLL || pllreg == BPLL) {
+ pll_div2_sel = readl(&clk->pll_div2_sel);
- freq = CONFIG_SYS_CLK_FREQ;
+ switch (pllreg) {
+ case MPLL:
+ fout_sel = (pll_div2_sel >> MPLL_FOUT_SEL_SHIFT)
+ & MPLL_FOUT_SEL_MASK;
+ break;
+ case BPLL:
+ fout_sel = (pll_div2_sel >> BPLL_FOUT_SEL_SHIFT)
+ & BPLL_FOUT_SEL_MASK;
+ break;
+ default:
+ fout_sel = -1;
+ break;
+ }
- if (pllreg == EPLL) {
- k = k & 0xffff;
- /* FOUT = (MDIV + K / 65536) * FIN / (PDIV * 2^SDIV) */
- fout = (m + k / 65536) * (freq / (p * (1 << s)));
- } else if (pllreg == VPLL) {
- k = k & 0xfff;
- /* FOUT = (MDIV + K / 1024) * FIN / (PDIV * 2^SDIV) */
- fout = (m + k / 1024) * (freq / (p * (1 << s)));
- } else {
- if (s < 1)
- s = 1;
- /* FOUT = MDIV * FIN / (PDIV * 2^(SDIV - 1)) */
- fout = m * (freq / (p * (1 << (s - 1))));
+ if (fout_sel == 0)
+ fout /= 2;
}
return fout;
}
+static unsigned long exynos5_get_periph_rate(int peripheral)
+{
+ struct clk_bit_info *bit_info = &clk_bit_info[peripheral];
+ unsigned long sclk, sub_clk;
+ unsigned int src, div, sub_div;
+ struct exynos5_clock *clk =
+ (struct exynos5_clock *)samsung_get_base_clock();
+
+ switch (peripheral) {
+ case PERIPH_ID_UART0:
+ case PERIPH_ID_UART1:
+ case PERIPH_ID_UART2:
+ case PERIPH_ID_UART3:
+ src = readl(&clk->src_peric0);
+ div = readl(&clk->div_peric0);
+ break;
+ case PERIPH_ID_PWM0:
+ case PERIPH_ID_PWM1:
+ case PERIPH_ID_PWM2:
+ case PERIPH_ID_PWM3:
+ case PERIPH_ID_PWM4:
+ src = readl(&clk->src_peric0);
+ div = readl(&clk->div_peric3);
+ break;
+ case PERIPH_ID_I2S0:
+ src = readl(&clk->src_mau);
+ div = readl(&clk->div_mau);
+ case PERIPH_ID_SPI0:
+ case PERIPH_ID_SPI1:
+ src = readl(&clk->src_peric1);
+ div = readl(&clk->div_peric1);
+ break;
+ case PERIPH_ID_SPI2:
+ src = readl(&clk->src_peric1);
+ div = readl(&clk->div_peric2);
+ break;
+ case PERIPH_ID_SPI3:
+ case PERIPH_ID_SPI4:
+ src = readl(&clk->sclk_src_isp);
+ div = readl(&clk->sclk_div_isp);
+ break;
+ case PERIPH_ID_SDMMC0:
+ case PERIPH_ID_SDMMC1:
+ case PERIPH_ID_SDMMC2:
+ case PERIPH_ID_SDMMC3:
+ src = readl(&clk->src_fsys);
+ div = readl(&clk->div_fsys1);
+ break;
+ case PERIPH_ID_I2C0:
+ case PERIPH_ID_I2C1:
+ case PERIPH_ID_I2C2:
+ case PERIPH_ID_I2C3:
+ case PERIPH_ID_I2C4:
+ case PERIPH_ID_I2C5:
+ case PERIPH_ID_I2C6:
+ case PERIPH_ID_I2C7:
+ sclk = exynos5_get_pll_clk(MPLL);
+ sub_div = ((readl(&clk->div_top1) >> bit_info->div_bit)
+ & 0x7) + 1;
+ div = ((readl(&clk->div_top0) >> bit_info->prediv_bit)
+ & 0x7) + 1;
+ return (sclk / sub_div) / div;
+ default:
+ debug("%s: invalid peripheral %d", __func__, peripheral);
+ return -1;
+ };
+
+ src = (src >> bit_info->src_bit) & 0xf;
+
+ switch (src) {
+ case EXYNOS_SRC_MPLL:
+ sclk = exynos5_get_pll_clk(MPLL);
+ break;
+ case EXYNOS_SRC_EPLL:
+ sclk = exynos5_get_pll_clk(EPLL);
+ break;
+ case EXYNOS_SRC_VPLL:
+ sclk = exynos5_get_pll_clk(VPLL);
+ break;
+ default:
+ return 0;
+ }
+
+ /* Ratio clock division for this peripheral */
+ sub_div = (div >> bit_info->div_bit) & 0xf;
+ sub_clk = sclk / (sub_div + 1);
+
+ /* Pre-ratio clock division for SDMMC0 and 2 */
+ if (peripheral == PERIPH_ID_SDMMC0 || peripheral == PERIPH_ID_SDMMC2) {
+ div = (div >> bit_info->prediv_bit) & 0xff;
+ return sub_clk / (div + 1);
+ }
+
+ return sub_clk;
+}
+
+unsigned long clock_get_periph_rate(int peripheral)
+{
+ if (cpu_is_exynos5())
+ return exynos5_get_periph_rate(peripheral);
+ else
+ return 0;
+}
+
/* exynos4: return ARM clock frequency */
static unsigned long exynos4_get_arm_clk(void)
{
return armclk;
}
+/* exynos4x12: return ARM clock frequency */
+static unsigned long exynos4x12_get_arm_clk(void)
+{
+ struct exynos4x12_clock *clk =
+ (struct exynos4x12_clock *)samsung_get_base_clock();
+ unsigned long div;
+ unsigned long armclk;
+ unsigned int core_ratio;
+ unsigned int core2_ratio;
+
+ div = readl(&clk->div_cpu0);
+
+ /* CORE_RATIO: [2:0], CORE2_RATIO: [30:28] */
+ core_ratio = (div >> 0) & 0x7;
+ core2_ratio = (div >> 28) & 0x7;
+
+ armclk = get_pll_clk(APLL) / (core_ratio + 1);
+ armclk /= (core2_ratio + 1);
+
+ return armclk;
+}
+
/* exynos5: return ARM clock frequency */
static unsigned long exynos5_get_arm_clk(void)
{
return pclk;
}
-/* exynos5: return pwm clock frequency */
-static unsigned long exynos5_get_pwm_clk(void)
+/* exynos4x12: return pwm clock frequency */
+static unsigned long exynos4x12_get_pwm_clk(void)
{
- struct exynos5_clock *clk =
- (struct exynos5_clock *)samsung_get_base_clock();
unsigned long pclk, sclk;
unsigned int ratio;
- /*
- * CLK_DIV_PERIC3
- * PWM_RATIO [3:0]
- */
- ratio = readl(&clk->div_peric3);
- ratio = ratio & 0xf;
sclk = get_pll_clk(MPLL);
+ ratio = 8;
pclk = sclk / (ratio + 1);
return uclk;
}
+/* exynos4x12: return uart clock frequency */
+static unsigned long exynos4x12_get_uart_clk(int dev_index)
+{
+ struct exynos4x12_clock *clk =
+ (struct exynos4x12_clock *)samsung_get_base_clock();
+ unsigned long uclk, sclk;
+ unsigned int sel;
+ unsigned int ratio;
+
+ /*
+ * CLK_SRC_PERIL0
+ * UART0_SEL [3:0]
+ * UART1_SEL [7:4]
+ * UART2_SEL [8:11]
+ * UART3_SEL [12:15]
+ * UART4_SEL [16:19]
+ */
+ sel = readl(&clk->src_peril0);
+ sel = (sel >> (dev_index << 2)) & 0xf;
+
+ if (sel == 0x6)
+ sclk = get_pll_clk(MPLL);
+ else if (sel == 0x7)
+ sclk = get_pll_clk(EPLL);
+ else if (sel == 0x8)
+ sclk = get_pll_clk(VPLL);
+ else
+ return 0;
+
+ /*
+ * CLK_DIV_PERIL0
+ * UART0_RATIO [3:0]
+ * UART1_RATIO [7:4]
+ * UART2_RATIO [8:11]
+ * UART3_RATIO [12:15]
+ * UART4_RATIO [16:19]
+ */
+ ratio = readl(&clk->div_peril0);
+ ratio = (ratio >> (dev_index << 2)) & 0xf;
+
+ uclk = sclk / (ratio + 1);
+
+ return uclk;
+}
+
/* exynos5: return uart clock frequency */
static unsigned long exynos5_get_uart_clk(int dev_index)
{
return uclk;
}
-/* exynos4: set the mmc clock */
-static void exynos4_set_mmc_clk(int dev_index, unsigned int div)
+static unsigned long exynos4_get_mmc_clk(int dev_index)
{
struct exynos4_clock *clk =
(struct exynos4_clock *)samsung_get_base_clock();
- unsigned int addr;
- unsigned int val;
+ unsigned long uclk, sclk;
+ unsigned int sel, ratio, pre_ratio;
+ int shift = 0;
- /*
- * CLK_DIV_FSYS1
- * MMC0_PRE_RATIO [15:8], MMC1_PRE_RATIO [31:24]
- * CLK_DIV_FSYS2
- * MMC2_PRE_RATIO [15:8], MMC3_PRE_RATIO [31:24]
- */
- if (dev_index < 2) {
- addr = (unsigned int)&clk->div_fsys1;
- } else {
- addr = (unsigned int)&clk->div_fsys2;
- dev_index -= 2;
+ sel = readl(&clk->src_fsys);
+ sel = (sel >> (dev_index << 2)) & 0xf;
+
+ if (sel == 0x6)
+ sclk = get_pll_clk(MPLL);
+ else if (sel == 0x7)
+ sclk = get_pll_clk(EPLL);
+ else if (sel == 0x8)
+ sclk = get_pll_clk(VPLL);
+ else
+ return 0;
+
+ switch (dev_index) {
+ case 0:
+ case 1:
+ ratio = readl(&clk->div_fsys1);
+ pre_ratio = readl(&clk->div_fsys1);
+ break;
+ case 2:
+ case 3:
+ ratio = readl(&clk->div_fsys2);
+ pre_ratio = readl(&clk->div_fsys2);
+ break;
+ case 4:
+ ratio = readl(&clk->div_fsys3);
+ pre_ratio = readl(&clk->div_fsys3);
+ break;
+ default:
+ return 0;
}
- val = readl(addr);
- val &= ~(0xff << ((dev_index << 4) + 8));
- val |= (div & 0xff) << ((dev_index << 4) + 8);
- writel(val, addr);
+ if (dev_index == 1 || dev_index == 3)
+ shift = 16;
+
+ ratio = (ratio >> shift) & 0xf;
+ pre_ratio = (pre_ratio >> (shift + 8)) & 0xff;
+ uclk = (sclk / (ratio + 1)) / (pre_ratio + 1);
+
+ return uclk;
}
-/* exynos5: set the mmc clock */
-static void exynos5_set_mmc_clk(int dev_index, unsigned int div)
+static unsigned long exynos5_get_mmc_clk(int dev_index)
{
struct exynos5_clock *clk =
(struct exynos5_clock *)samsung_get_base_clock();
- unsigned int addr;
- unsigned int val;
+ unsigned long uclk, sclk;
+ unsigned int sel, ratio, pre_ratio;
+ int shift = 0;
- /*
+ sel = readl(&clk->src_fsys);
+ sel = (sel >> (dev_index << 2)) & 0xf;
+
+ if (sel == 0x6)
+ sclk = get_pll_clk(MPLL);
+ else if (sel == 0x7)
+ sclk = get_pll_clk(EPLL);
+ else if (sel == 0x8)
+ sclk = get_pll_clk(VPLL);
+ else
+ return 0;
+
+ switch (dev_index) {
+ case 0:
+ case 1:
+ ratio = readl(&clk->div_fsys1);
+ pre_ratio = readl(&clk->div_fsys1);
+ break;
+ case 2:
+ case 3:
+ ratio = readl(&clk->div_fsys2);
+ pre_ratio = readl(&clk->div_fsys2);
+ break;
+ default:
+ return 0;
+ }
+
+ if (dev_index == 1 || dev_index == 3)
+ shift = 16;
+
+ ratio = (ratio >> shift) & 0xf;
+ pre_ratio = (pre_ratio >> (shift + 8)) & 0xff;
+ uclk = (sclk / (ratio + 1)) / (pre_ratio + 1);
+
+ return uclk;
+}
+
+/* exynos4: set the mmc clock */
+static void exynos4_set_mmc_clk(int dev_index, unsigned int div)
+{
+ struct exynos4_clock *clk =
+ (struct exynos4_clock *)samsung_get_base_clock();
+ unsigned int addr;
+ unsigned int val;
+
+ /*
* CLK_DIV_FSYS1
* MMC0_PRE_RATIO [15:8], MMC1_PRE_RATIO [31:24]
* CLK_DIV_FSYS2
* MMC2_PRE_RATIO [15:8], MMC3_PRE_RATIO [31:24]
+ * CLK_DIV_FSYS3
+ * MMC4_PRE_RATIO [15:8]
*/
if (dev_index < 2) {
addr = (unsigned int)&clk->div_fsys1;
+ } else if (dev_index == 4) {
+ addr = (unsigned int)&clk->div_fsys3;
+ dev_index -= 4;
} else {
addr = (unsigned int)&clk->div_fsys2;
dev_index -= 2;
writel(val, addr);
}
+/* exynos4x12: set the mmc clock */
+static void exynos4x12_set_mmc_clk(int dev_index, unsigned int div)
+{
+ struct exynos4x12_clock *clk =
+ (struct exynos4x12_clock *)samsung_get_base_clock();
+ unsigned int addr;
+ unsigned int val;
+
+ /*
+ * CLK_DIV_FSYS1
+ * MMC0_PRE_RATIO [15:8], MMC1_PRE_RATIO [31:24]
+ * CLK_DIV_FSYS2
+ * MMC2_PRE_RATIO [15:8], MMC3_PRE_RATIO [31:24]
+ */
+ if (dev_index < 2) {
+ addr = (unsigned int)&clk->div_fsys1;
+ } else {
+ addr = (unsigned int)&clk->div_fsys2;
+ dev_index -= 2;
+ }
+
+ val = readl(addr);
+ val &= ~(0xff << ((dev_index << 4) + 8));
+ val |= (div & 0xff) << ((dev_index << 4) + 8);
+ writel(val, addr);
+}
+
+/* exynos5: set the mmc clock */
+static void exynos5_set_mmc_clk(int dev_index, unsigned int div)
+{
+ struct exynos5_clock *clk =
+ (struct exynos5_clock *)samsung_get_base_clock();
+ unsigned int addr;
+ unsigned int val;
+
+ /*
+ * CLK_DIV_FSYS1
+ * MMC0_PRE_RATIO [15:8], MMC1_PRE_RATIO [31:24]
+ * CLK_DIV_FSYS2
+ * MMC2_PRE_RATIO [15:8], MMC3_PRE_RATIO [31:24]
+ */
+ if (dev_index < 2) {
+ addr = (unsigned int)&clk->div_fsys1;
+ } else {
+ addr = (unsigned int)&clk->div_fsys2;
+ dev_index -= 2;
+ }
+
+ val = readl(addr);
+ val &= ~(0xff << ((dev_index << 4) + 8));
+ val |= (div & 0xff) << ((dev_index << 4) + 8);
+ writel(val, addr);
+}
+
+/* get_lcd_clk: return lcd clock frequency */
+static unsigned long exynos4_get_lcd_clk(void)
+{
+ struct exynos4_clock *clk =
+ (struct exynos4_clock *)samsung_get_base_clock();
+ unsigned long pclk, sclk;
+ unsigned int sel;
+ unsigned int ratio;
+
+ /*
+ * CLK_SRC_LCD0
+ * FIMD0_SEL [3:0]
+ */
+ sel = readl(&clk->src_lcd0);
+ sel = sel & 0xf;
+
+ /*
+ * 0x6: SCLK_MPLL
+ * 0x7: SCLK_EPLL
+ * 0x8: SCLK_VPLL
+ */
+ if (sel == 0x6)
+ sclk = get_pll_clk(MPLL);
+ else if (sel == 0x7)
+ sclk = get_pll_clk(EPLL);
+ else if (sel == 0x8)
+ sclk = get_pll_clk(VPLL);
+ else
+ return 0;
+
+ /*
+ * CLK_DIV_LCD0
+ * FIMD0_RATIO [3:0]
+ */
+ ratio = readl(&clk->div_lcd0);
+ ratio = ratio & 0xf;
+
+ pclk = sclk / (ratio + 1);
+
+ return pclk;
+}
+
+/* get_lcd_clk: return lcd clock frequency */
+static unsigned long exynos5_get_lcd_clk(void)
+{
+ struct exynos5_clock *clk =
+ (struct exynos5_clock *)samsung_get_base_clock();
+ unsigned long pclk, sclk;
+ unsigned int sel;
+ unsigned int ratio;
+
+ /*
+ * CLK_SRC_LCD0
+ * FIMD0_SEL [3:0]
+ */
+ sel = readl(&clk->src_disp1_0);
+ sel = sel & 0xf;
+
+ /*
+ * 0x6: SCLK_MPLL
+ * 0x7: SCLK_EPLL
+ * 0x8: SCLK_VPLL
+ */
+ if (sel == 0x6)
+ sclk = get_pll_clk(MPLL);
+ else if (sel == 0x7)
+ sclk = get_pll_clk(EPLL);
+ else if (sel == 0x8)
+ sclk = get_pll_clk(VPLL);
+ else
+ return 0;
+
+ /*
+ * CLK_DIV_LCD0
+ * FIMD0_RATIO [3:0]
+ */
+ ratio = readl(&clk->div_disp1_0);
+ ratio = ratio & 0xf;
+
+ pclk = sclk / (ratio + 1);
+
+ return pclk;
+}
+
+void exynos4_set_lcd_clk(void)
+{
+ struct exynos4_clock *clk =
+ (struct exynos4_clock *)samsung_get_base_clock();
+ unsigned int cfg = 0;
+
+ /*
+ * CLK_GATE_BLOCK
+ * CLK_CAM [0]
+ * CLK_TV [1]
+ * CLK_MFC [2]
+ * CLK_G3D [3]
+ * CLK_LCD0 [4]
+ * CLK_LCD1 [5]
+ * CLK_GPS [7]
+ */
+ cfg = readl(&clk->gate_block);
+ cfg |= 1 << 4;
+ writel(cfg, &clk->gate_block);
+
+ /*
+ * CLK_SRC_LCD0
+ * FIMD0_SEL [3:0]
+ * MDNIE0_SEL [7:4]
+ * MDNIE_PWM0_SEL [8:11]
+ * MIPI0_SEL [12:15]
+ * set lcd0 src clock 0x6: SCLK_MPLL
+ */
+ cfg = readl(&clk->src_lcd0);
+ cfg &= ~(0xf);
+ cfg |= 0x6;
+ writel(cfg, &clk->src_lcd0);
+
+ /*
+ * CLK_GATE_IP_LCD0
+ * CLK_FIMD0 [0]
+ * CLK_MIE0 [1]
+ * CLK_MDNIE0 [2]
+ * CLK_DSIM0 [3]
+ * CLK_SMMUFIMD0 [4]
+ * CLK_PPMULCD0 [5]
+ * Gating all clocks for FIMD0
+ */
+ cfg = readl(&clk->gate_ip_lcd0);
+ cfg |= 1 << 0;
+ writel(cfg, &clk->gate_ip_lcd0);
+
+ /*
+ * CLK_DIV_LCD0
+ * FIMD0_RATIO [3:0]
+ * MDNIE0_RATIO [7:4]
+ * MDNIE_PWM0_RATIO [11:8]
+ * MDNIE_PWM_PRE_RATIO [15:12]
+ * MIPI0_RATIO [19:16]
+ * MIPI0_PRE_RATIO [23:20]
+ * set fimd ratio
+ */
+ cfg &= ~(0xf);
+ cfg |= 0x1;
+ writel(cfg, &clk->div_lcd0);
+}
+
+void exynos5_set_lcd_clk(void)
+{
+ struct exynos5_clock *clk =
+ (struct exynos5_clock *)samsung_get_base_clock();
+ unsigned int cfg = 0;
+
+ /*
+ * CLK_GATE_BLOCK
+ * CLK_CAM [0]
+ * CLK_TV [1]
+ * CLK_MFC [2]
+ * CLK_G3D [3]
+ * CLK_LCD0 [4]
+ * CLK_LCD1 [5]
+ * CLK_GPS [7]
+ */
+ cfg = readl(&clk->gate_block);
+ cfg |= 1 << 4;
+ writel(cfg, &clk->gate_block);
+
+ /*
+ * CLK_SRC_LCD0
+ * FIMD0_SEL [3:0]
+ * MDNIE0_SEL [7:4]
+ * MDNIE_PWM0_SEL [8:11]
+ * MIPI0_SEL [12:15]
+ * set lcd0 src clock 0x6: SCLK_MPLL
+ */
+ cfg = readl(&clk->src_disp1_0);
+ cfg &= ~(0xf);
+ cfg |= 0x6;
+ writel(cfg, &clk->src_disp1_0);
+
+ /*
+ * CLK_GATE_IP_LCD0
+ * CLK_FIMD0 [0]
+ * CLK_MIE0 [1]
+ * CLK_MDNIE0 [2]
+ * CLK_DSIM0 [3]
+ * CLK_SMMUFIMD0 [4]
+ * CLK_PPMULCD0 [5]
+ * Gating all clocks for FIMD0
+ */
+ cfg = readl(&clk->gate_ip_disp1);
+ cfg |= 1 << 0;
+ writel(cfg, &clk->gate_ip_disp1);
+
+ /*
+ * CLK_DIV_LCD0
+ * FIMD0_RATIO [3:0]
+ * MDNIE0_RATIO [7:4]
+ * MDNIE_PWM0_RATIO [11:8]
+ * MDNIE_PWM_PRE_RATIO [15:12]
+ * MIPI0_RATIO [19:16]
+ * MIPI0_PRE_RATIO [23:20]
+ * set fimd ratio
+ */
+ cfg &= ~(0xf);
+ cfg |= 0x0;
+ writel(cfg, &clk->div_disp1_0);
+}
+
+void exynos4_set_mipi_clk(void)
+{
+ struct exynos4_clock *clk =
+ (struct exynos4_clock *)samsung_get_base_clock();
+ unsigned int cfg = 0;
+
+ /*
+ * CLK_SRC_LCD0
+ * FIMD0_SEL [3:0]
+ * MDNIE0_SEL [7:4]
+ * MDNIE_PWM0_SEL [8:11]
+ * MIPI0_SEL [12:15]
+ * set mipi0 src clock 0x6: SCLK_MPLL
+ */
+ cfg = readl(&clk->src_lcd0);
+ cfg &= ~(0xf << 12);
+ cfg |= (0x6 << 12);
+ writel(cfg, &clk->src_lcd0);
+
+ /*
+ * CLK_SRC_MASK_LCD0
+ * FIMD0_MASK [0]
+ * MDNIE0_MASK [4]
+ * MDNIE_PWM0_MASK [8]
+ * MIPI0_MASK [12]
+ * set src mask mipi0 0x1: Unmask
+ */
+ cfg = readl(&clk->src_mask_lcd0);
+ cfg |= (0x1 << 12);
+ writel(cfg, &clk->src_mask_lcd0);
+
+ /*
+ * CLK_GATE_IP_LCD0
+ * CLK_FIMD0 [0]
+ * CLK_MIE0 [1]
+ * CLK_MDNIE0 [2]
+ * CLK_DSIM0 [3]
+ * CLK_SMMUFIMD0 [4]
+ * CLK_PPMULCD0 [5]
+ * Gating all clocks for MIPI0
+ */
+ cfg = readl(&clk->gate_ip_lcd0);
+ cfg |= 1 << 3;
+ writel(cfg, &clk->gate_ip_lcd0);
+
+ /*
+ * CLK_DIV_LCD0
+ * FIMD0_RATIO [3:0]
+ * MDNIE0_RATIO [7:4]
+ * MDNIE_PWM0_RATIO [11:8]
+ * MDNIE_PWM_PRE_RATIO [15:12]
+ * MIPI0_RATIO [19:16]
+ * MIPI0_PRE_RATIO [23:20]
+ * set mipi ratio
+ */
+ cfg &= ~(0xf << 16);
+ cfg |= (0x1 << 16);
+ writel(cfg, &clk->div_lcd0);
+}
+
+/*
+ * I2C
+ *
+ * exynos5: obtaining the I2C clock
+ */
+static unsigned long exynos5_get_i2c_clk(void)
+{
+ struct exynos5_clock *clk =
+ (struct exynos5_clock *)samsung_get_base_clock();
+ unsigned long aclk_66, aclk_66_pre, sclk;
+ unsigned int ratio;
+
+ sclk = get_pll_clk(MPLL);
+
+ ratio = (readl(&clk->div_top1)) >> 24;
+ ratio &= 0x7;
+ aclk_66_pre = sclk / (ratio + 1);
+ ratio = readl(&clk->div_top0);
+ ratio &= 0x7;
+ aclk_66 = aclk_66_pre / (ratio + 1);
+ return aclk_66;
+}
+
+int exynos5_set_epll_clk(unsigned long rate)
+{
+ unsigned int epll_con, epll_con_k;
+ unsigned int i;
+ unsigned int lockcnt;
+ unsigned int start;
+ struct exynos5_clock *clk =
+ (struct exynos5_clock *)samsung_get_base_clock();
+
+ epll_con = readl(&clk->epll_con0);
+ epll_con &= ~((EPLL_CON0_LOCK_DET_EN_MASK <<
+ EPLL_CON0_LOCK_DET_EN_SHIFT) |
+ EPLL_CON0_MDIV_MASK << EPLL_CON0_MDIV_SHIFT |
+ EPLL_CON0_PDIV_MASK << EPLL_CON0_PDIV_SHIFT |
+ EPLL_CON0_SDIV_MASK << EPLL_CON0_SDIV_SHIFT);
+
+ for (i = 0; i < ARRAY_SIZE(exynos5_epll_div); i++) {
+ if (exynos5_epll_div[i].freq_out == rate)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(exynos5_epll_div))
+ return -1;
+
+ epll_con_k = exynos5_epll_div[i].k_dsm << 0;
+ epll_con |= exynos5_epll_div[i].en_lock_det <<
+ EPLL_CON0_LOCK_DET_EN_SHIFT;
+ epll_con |= exynos5_epll_div[i].m_div << EPLL_CON0_MDIV_SHIFT;
+ epll_con |= exynos5_epll_div[i].p_div << EPLL_CON0_PDIV_SHIFT;
+ epll_con |= exynos5_epll_div[i].s_div << EPLL_CON0_SDIV_SHIFT;
+
+ /*
+ * Required period ( in cycles) to genarate a stable clock output.
+ * The maximum clock time can be up to 3000 * PDIV cycles of PLLs
+ * frequency input (as per spec)
+ */
+ lockcnt = 3000 * exynos5_epll_div[i].p_div;
+
+ writel(lockcnt, &clk->epll_lock);
+ writel(epll_con, &clk->epll_con0);
+ writel(epll_con_k, &clk->epll_con1);
+
+ start = get_timer(0);
+
+ while (!(readl(&clk->epll_con0) &
+ (0x1 << EXYNOS5_EPLLCON0_LOCKED_SHIFT))) {
+ if (get_timer(start) > TIMEOUT_EPLL_LOCK) {
+ debug("%s: Timeout waiting for EPLL lock\n", __func__);
+ return -1;
+ }
+ }
+ return 0;
+}
+
+int exynos5_set_i2s_clk_source(unsigned int i2s_id)
+{
+ struct exynos5_clock *clk =
+ (struct exynos5_clock *)samsung_get_base_clock();
+ unsigned int *audio_ass = (unsigned int *)samsung_get_base_audio_ass();
+
+ if (i2s_id == 0) {
+ setbits_le32(&clk->src_top2, CLK_SRC_MOUT_EPLL);
+ clrsetbits_le32(&clk->src_mau, AUDIO0_SEL_MASK,
+ (CLK_SRC_SCLK_EPLL));
+ setbits_le32(audio_ass, AUDIO_CLKMUX_ASS);
+ } else if (i2s_id == 1) {
+ clrsetbits_le32(&clk->src_peric1, AUDIO1_SEL_MASK,
+ (CLK_SRC_SCLK_EPLL));
+ } else {
+ return -1;
+ }
+ return 0;
+}
+
+int exynos5_set_i2s_clk_prescaler(unsigned int src_frq,
+ unsigned int dst_frq,
+ unsigned int i2s_id)
+{
+ struct exynos5_clock *clk =
+ (struct exynos5_clock *)samsung_get_base_clock();
+ unsigned int div;
+
+ if ((dst_frq == 0) || (src_frq == 0)) {
+ debug("%s: Invalid requency input for prescaler\n", __func__);
+ debug("src frq = %d des frq = %d ", src_frq, dst_frq);
+ return -1;
+ }
+
+ div = (src_frq / dst_frq);
+ if (i2s_id == 0) {
+ if (div > AUDIO_0_RATIO_MASK) {
+ debug("%s: Frequency ratio is out of range\n",
+ __func__);
+ debug("src frq = %d des frq = %d ", src_frq, dst_frq);
+ return -1;
+ }
+ clrsetbits_le32(&clk->div_mau, AUDIO_0_RATIO_MASK,
+ (div & AUDIO_0_RATIO_MASK));
+ } else if(i2s_id == 1) {
+ if (div > AUDIO_1_RATIO_MASK) {
+ debug("%s: Frequency ratio is out of range\n",
+ __func__);
+ debug("src frq = %d des frq = %d ", src_frq, dst_frq);
+ return -1;
+ }
+ clrsetbits_le32(&clk->div_peric4, AUDIO_1_RATIO_MASK,
+ (div & AUDIO_1_RATIO_MASK));
+ } else {
+ return -1;
+ }
+ return 0;
+}
+
+/**
+ * Linearly searches for the most accurate main and fine stage clock scalars
+ * (divisors) for a specified target frequency and scalar bit sizes by checking
+ * all multiples of main_scalar_bits values. Will always return scalars up to or
+ * slower than target.
+ *
+ * @param main_scalar_bits Number of main scalar bits, must be > 0 and < 32
+ * @param fine_scalar_bits Number of fine scalar bits, must be > 0 and < 32
+ * @param input_freq Clock frequency to be scaled in Hz
+ * @param target_freq Desired clock frequency in Hz
+ * @param best_fine_scalar Pointer to store the fine stage divisor
+ *
+ * @return best_main_scalar Main scalar for desired frequency or -1 if none
+ * found
+ */
+static int clock_calc_best_scalar(unsigned int main_scaler_bits,
+ unsigned int fine_scalar_bits, unsigned int input_rate,
+ unsigned int target_rate, unsigned int *best_fine_scalar)
+{
+ int i;
+ int best_main_scalar = -1;
+ unsigned int best_error = target_rate;
+ const unsigned int cap = (1 << fine_scalar_bits) - 1;
+ const unsigned int loops = 1 << main_scaler_bits;
+
+ debug("Input Rate is %u, Target is %u, Cap is %u\n", input_rate,
+ target_rate, cap);
+
+ assert(best_fine_scalar != NULL);
+ assert(main_scaler_bits <= fine_scalar_bits);
+
+ *best_fine_scalar = 1;
+
+ if (input_rate == 0 || target_rate == 0)
+ return -1;
+
+ if (target_rate >= input_rate)
+ return 1;
+
+ for (i = 1; i <= loops; i++) {
+ const unsigned int effective_div = max(min(input_rate / i /
+ target_rate, cap), 1);
+ const unsigned int effective_rate = input_rate / i /
+ effective_div;
+ const int error = target_rate - effective_rate;
+
+ debug("%d|effdiv:%u, effrate:%u, error:%d\n", i, effective_div,
+ effective_rate, error);
+
+ if (error >= 0 && error <= best_error) {
+ best_error = error;
+ best_main_scalar = i;
+ *best_fine_scalar = effective_div;
+ }
+ }
+
+ return best_main_scalar;
+}
+
+static int exynos5_set_spi_clk(enum periph_id periph_id,
+ unsigned int rate)
+{
+ struct exynos5_clock *clk =
+ (struct exynos5_clock *)samsung_get_base_clock();
+ int main;
+ unsigned int fine;
+ unsigned shift, pre_shift;
+ unsigned mask = 0xff;
+ u32 *reg;
+
+ main = clock_calc_best_scalar(4, 8, 400000000, rate, &fine);
+ if (main < 0) {
+ debug("%s: Cannot set clock rate for periph %d",
+ __func__, periph_id);
+ return -1;
+ }
+ main = main - 1;
+ fine = fine - 1;
+
+ switch (periph_id) {
+ case PERIPH_ID_SPI0:
+ reg = &clk->div_peric1;
+ shift = 0;
+ pre_shift = 8;
+ break;
+ case PERIPH_ID_SPI1:
+ reg = &clk->div_peric1;
+ shift = 16;
+ pre_shift = 24;
+ break;
+ case PERIPH_ID_SPI2:
+ reg = &clk->div_peric2;
+ shift = 0;
+ pre_shift = 8;
+ break;
+ case PERIPH_ID_SPI3:
+ reg = &clk->sclk_div_isp;
+ shift = 0;
+ pre_shift = 4;
+ break;
+ case PERIPH_ID_SPI4:
+ reg = &clk->sclk_div_isp;
+ shift = 12;
+ pre_shift = 16;
+ break;
+ default:
+ debug("%s: Unsupported peripheral ID %d\n", __func__,
+ periph_id);
+ return -1;
+ }
+ clrsetbits_le32(reg, mask << shift, (main & mask) << shift);
+ clrsetbits_le32(reg, mask << pre_shift, (fine & mask) << pre_shift);
+
+ return 0;
+}
+
+static unsigned long exynos4_get_i2c_clk(void)
+{
+ struct exynos4_clock *clk =
+ (struct exynos4_clock *)samsung_get_base_clock();
+ unsigned long sclk, aclk_100;
+ unsigned int ratio;
+
+ sclk = get_pll_clk(APLL);
+
+ ratio = (readl(&clk->div_top)) >> 4;
+ ratio &= 0xf;
+ aclk_100 = sclk / (ratio + 1);
+ return aclk_100;
+}
+
unsigned long get_pll_clk(int pllreg)
{
if (cpu_is_exynos5())
return exynos5_get_pll_clk(pllreg);
- else
+ else {
+ if (proid_is_exynos4412())
+ return exynos4x12_get_pll_clk(pllreg);
return exynos4_get_pll_clk(pllreg);
+ }
}
unsigned long get_arm_clk(void)
{
if (cpu_is_exynos5())
return exynos5_get_arm_clk();
- else
+ else {
+ if (proid_is_exynos4412())
+ return exynos4x12_get_arm_clk();
return exynos4_get_arm_clk();
+ }
+}
+
+unsigned long get_i2c_clk(void)
+{
+ if (cpu_is_exynos5()) {
+ return exynos5_get_i2c_clk();
+ } else if (cpu_is_exynos4()) {
+ return exynos4_get_i2c_clk();
+ } else {
+ debug("I2C clock is not set for this CPU\n");
+ return 0;
+ }
}
unsigned long get_pwm_clk(void)
{
if (cpu_is_exynos5())
- return exynos5_get_pwm_clk();
- else
+ return clock_get_periph_rate(PERIPH_ID_PWM0);
+ else {
+ if (proid_is_exynos4412())
+ return exynos4x12_get_pwm_clk();
return exynos4_get_pwm_clk();
+ }
}
unsigned long get_uart_clk(int dev_index)
{
if (cpu_is_exynos5())
return exynos5_get_uart_clk(dev_index);
- else
+ else {
+ if (proid_is_exynos4412())
+ return exynos4x12_get_uart_clk(dev_index);
return exynos4_get_uart_clk(dev_index);
+ }
+}
+
+unsigned long get_mmc_clk(int dev_index)
+{
+ if (cpu_is_exynos5())
+ return exynos5_get_mmc_clk(dev_index);
+ else
+ return exynos4_get_mmc_clk(dev_index);
}
void set_mmc_clk(int dev_index, unsigned int div)
{
if (cpu_is_exynos5())
exynos5_set_mmc_clk(dev_index, div);
+ else {
+ if (proid_is_exynos4412())
+ exynos4x12_set_mmc_clk(dev_index, div);
+ else
+ exynos4_set_mmc_clk(dev_index, div);
+ }
+}
+
+unsigned long get_lcd_clk(void)
+{
+ if (cpu_is_exynos4())
+ return exynos4_get_lcd_clk();
else
- exynos4_set_mmc_clk(dev_index, div);
+ return exynos5_get_lcd_clk();
+}
+
+void set_lcd_clk(void)
+{
+ if (cpu_is_exynos4())
+ exynos4_set_lcd_clk();
+ else
+ exynos5_set_lcd_clk();
+}
+
+void set_mipi_clk(void)
+{
+ if (cpu_is_exynos4())
+ exynos4_set_mipi_clk();
+}
+
+int set_spi_clk(int periph_id, unsigned int rate)
+{
+ if (cpu_is_exynos5())
+ return exynos5_set_spi_clk(periph_id, rate);
+ else
+ return 0;
+}
+
+int set_i2s_clk_prescaler(unsigned int src_frq, unsigned int dst_frq,
+ unsigned int i2s_id)
+{
+ if (cpu_is_exynos5())
+ return exynos5_set_i2s_clk_prescaler(src_frq, dst_frq, i2s_id);
+ else
+ return 0;
+}
+
+int set_i2s_clk_source(unsigned int i2s_id)
+{
+ if (cpu_is_exynos5())
+ return exynos5_set_i2s_clk_source(i2s_id);
+ else
+ return 0;
+}
+
+int set_epll_clk(unsigned long rate)
+{
+ if (cpu_is_exynos5())
+ return exynos5_set_epll_clk(rate);
+ else
+ return 0;
}
projects / karo-tx-uboot.git / blobdiff