+++ /dev/null
-/*
- * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
- * JZ4740 SoC clock support
- *
- * 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.
- *
- * 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.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/clk.h>
-#include <linux/spinlock.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/list.h>
-#include <linux/err.h>
-
-#include <asm/mach-jz4740/clock.h>
-#include "clock.h"
-
-#define JZ_REG_CLOCK_CTRL 0x00
-#define JZ_REG_CLOCK_LOW_POWER 0x04
-#define JZ_REG_CLOCK_PLL 0x10
-#define JZ_REG_CLOCK_GATE 0x20
-#define JZ_REG_CLOCK_SLEEP_CTRL 0x24
-#define JZ_REG_CLOCK_I2S 0x60
-#define JZ_REG_CLOCK_LCD 0x64
-#define JZ_REG_CLOCK_MMC 0x68
-#define JZ_REG_CLOCK_UHC 0x6C
-#define JZ_REG_CLOCK_SPI 0x74
-
-#define JZ_CLOCK_CTRL_I2S_SRC_PLL BIT(31)
-#define JZ_CLOCK_CTRL_KO_ENABLE BIT(30)
-#define JZ_CLOCK_CTRL_UDC_SRC_PLL BIT(29)
-#define JZ_CLOCK_CTRL_UDIV_MASK 0x1f800000
-#define JZ_CLOCK_CTRL_CHANGE_ENABLE BIT(22)
-#define JZ_CLOCK_CTRL_PLL_HALF BIT(21)
-#define JZ_CLOCK_CTRL_LDIV_MASK 0x001f0000
-#define JZ_CLOCK_CTRL_UDIV_OFFSET 23
-#define JZ_CLOCK_CTRL_LDIV_OFFSET 16
-#define JZ_CLOCK_CTRL_MDIV_OFFSET 12
-#define JZ_CLOCK_CTRL_PDIV_OFFSET 8
-#define JZ_CLOCK_CTRL_HDIV_OFFSET 4
-#define JZ_CLOCK_CTRL_CDIV_OFFSET 0
-
-#define JZ_CLOCK_GATE_UART0 BIT(0)
-#define JZ_CLOCK_GATE_TCU BIT(1)
-#define JZ_CLOCK_GATE_RTC BIT(2)
-#define JZ_CLOCK_GATE_I2C BIT(3)
-#define JZ_CLOCK_GATE_SPI BIT(4)
-#define JZ_CLOCK_GATE_AIC BIT(5)
-#define JZ_CLOCK_GATE_I2S BIT(6)
-#define JZ_CLOCK_GATE_MMC BIT(7)
-#define JZ_CLOCK_GATE_ADC BIT(8)
-#define JZ_CLOCK_GATE_CIM BIT(9)
-#define JZ_CLOCK_GATE_LCD BIT(10)
-#define JZ_CLOCK_GATE_UDC BIT(11)
-#define JZ_CLOCK_GATE_DMAC BIT(12)
-#define JZ_CLOCK_GATE_IPU BIT(13)
-#define JZ_CLOCK_GATE_UHC BIT(14)
-#define JZ_CLOCK_GATE_UART1 BIT(15)
-
-#define JZ_CLOCK_I2S_DIV_MASK 0x01ff
-
-#define JZ_CLOCK_LCD_DIV_MASK 0x01ff
-
-#define JZ_CLOCK_MMC_DIV_MASK 0x001f
-
-#define JZ_CLOCK_UHC_DIV_MASK 0x000f
-
-#define JZ_CLOCK_SPI_SRC_PLL BIT(31)
-#define JZ_CLOCK_SPI_DIV_MASK 0x000f
-
-#define JZ_CLOCK_PLL_M_MASK 0x01ff
-#define JZ_CLOCK_PLL_N_MASK 0x001f
-#define JZ_CLOCK_PLL_OD_MASK 0x0003
-#define JZ_CLOCK_PLL_STABLE BIT(10)
-#define JZ_CLOCK_PLL_BYPASS BIT(9)
-#define JZ_CLOCK_PLL_ENABLED BIT(8)
-#define JZ_CLOCK_PLL_STABLIZE_MASK 0x000f
-#define JZ_CLOCK_PLL_M_OFFSET 23
-#define JZ_CLOCK_PLL_N_OFFSET 18
-#define JZ_CLOCK_PLL_OD_OFFSET 16
-
-#define JZ_CLOCK_LOW_POWER_MODE_DOZE BIT(2)
-#define JZ_CLOCK_LOW_POWER_MODE_SLEEP BIT(0)
-
-#define JZ_CLOCK_SLEEP_CTRL_SUSPEND_UHC BIT(7)
-#define JZ_CLOCK_SLEEP_CTRL_ENABLE_UDC BIT(6)
-
-static void __iomem *jz_clock_base;
-static spinlock_t jz_clock_lock;
-static LIST_HEAD(jz_clocks);
-
-struct main_clk {
- struct clk clk;
- uint32_t div_offset;
-};
-
-struct divided_clk {
- struct clk clk;
- uint32_t reg;
- uint32_t mask;
-};
-
-struct static_clk {
- struct clk clk;
- unsigned long rate;
-};
-
-static uint32_t jz_clk_reg_read(int reg)
-{
- return readl(jz_clock_base + reg);
-}
-
-static void jz_clk_reg_write_mask(int reg, uint32_t val, uint32_t mask)
-{
- uint32_t val2;
-
- spin_lock(&jz_clock_lock);
- val2 = readl(jz_clock_base + reg);
- val2 &= ~mask;
- val2 |= val;
- writel(val2, jz_clock_base + reg);
- spin_unlock(&jz_clock_lock);
-}
-
-static void jz_clk_reg_set_bits(int reg, uint32_t mask)
-{
- uint32_t val;
-
- spin_lock(&jz_clock_lock);
- val = readl(jz_clock_base + reg);
- val |= mask;
- writel(val, jz_clock_base + reg);
- spin_unlock(&jz_clock_lock);
-}
-
-static void jz_clk_reg_clear_bits(int reg, uint32_t mask)
-{
- uint32_t val;
-
- spin_lock(&jz_clock_lock);
- val = readl(jz_clock_base + reg);
- val &= ~mask;
- writel(val, jz_clock_base + reg);
- spin_unlock(&jz_clock_lock);
-}
-
-static int jz_clk_enable_gating(struct clk *clk)
-{
- if (clk->gate_bit == JZ4740_CLK_NOT_GATED)
- return -EINVAL;
-
- jz_clk_reg_clear_bits(JZ_REG_CLOCK_GATE, clk->gate_bit);
- return 0;
-}
-
-static int jz_clk_disable_gating(struct clk *clk)
-{
- if (clk->gate_bit == JZ4740_CLK_NOT_GATED)
- return -EINVAL;
-
- jz_clk_reg_set_bits(JZ_REG_CLOCK_GATE, clk->gate_bit);
- return 0;
-}
-
-static int jz_clk_is_enabled_gating(struct clk *clk)
-{
- if (clk->gate_bit == JZ4740_CLK_NOT_GATED)
- return 1;
-
- return !(jz_clk_reg_read(JZ_REG_CLOCK_GATE) & clk->gate_bit);
-}
-
-static unsigned long jz_clk_static_get_rate(struct clk *clk)
-{
- return ((struct static_clk*)clk)->rate;
-}
-
-static int jz_clk_ko_enable(struct clk *clk)
-{
- jz_clk_reg_set_bits(JZ_REG_CLOCK_CTRL, JZ_CLOCK_CTRL_KO_ENABLE);
- return 0;
-}
-
-static int jz_clk_ko_disable(struct clk *clk)
-{
- jz_clk_reg_clear_bits(JZ_REG_CLOCK_CTRL, JZ_CLOCK_CTRL_KO_ENABLE);
- return 0;
-}
-
-static int jz_clk_ko_is_enabled(struct clk *clk)
-{
- return !!(jz_clk_reg_read(JZ_REG_CLOCK_CTRL) & JZ_CLOCK_CTRL_KO_ENABLE);
-}
-
-static const int pllno[] = {1, 2, 2, 4};
-
-static unsigned long jz_clk_pll_get_rate(struct clk *clk)
-{
- uint32_t val;
- int m;
- int n;
- int od;
-
- val = jz_clk_reg_read(JZ_REG_CLOCK_PLL);
-
- if (val & JZ_CLOCK_PLL_BYPASS)
- return clk_get_rate(clk->parent);
-
- m = ((val >> 23) & 0x1ff) + 2;
- n = ((val >> 18) & 0x1f) + 2;
- od = (val >> 16) & 0x3;
-
- return clk_get_rate(clk->parent) * (m / n) / pllno[od];
-}
-
-static unsigned long jz_clk_pll_half_get_rate(struct clk *clk)
-{
- uint32_t reg;
-
- reg = jz_clk_reg_read(JZ_REG_CLOCK_CTRL);
- if (reg & JZ_CLOCK_CTRL_PLL_HALF)
- return jz_clk_pll_get_rate(clk->parent);
- return jz_clk_pll_get_rate(clk->parent) >> 1;
-}
-
-static const int jz_clk_main_divs[] = {1, 2, 3, 4, 6, 8, 12, 16, 24, 32};
-
-static unsigned long jz_clk_main_round_rate(struct clk *clk, unsigned long rate)
-{
- unsigned long parent_rate = jz_clk_pll_get_rate(clk->parent);
- int div;
-
- div = parent_rate / rate;
- if (div > 32)
- return parent_rate / 32;
- else if (div < 1)
- return parent_rate;
-
- div &= (0x3 << (ffs(div) - 1));
-
- return parent_rate / div;
-}
-
-static unsigned long jz_clk_main_get_rate(struct clk *clk) {
- struct main_clk *mclk = (struct main_clk*)clk;
- uint32_t div;
-
- div = jz_clk_reg_read(JZ_REG_CLOCK_CTRL);
-
- div >>= mclk->div_offset;
- div &= 0xf;
-
- if (div >= ARRAY_SIZE(jz_clk_main_divs))
- div = ARRAY_SIZE(jz_clk_main_divs) - 1;
-
- return jz_clk_pll_get_rate(clk->parent) / jz_clk_main_divs[div];
-}
-
-static int jz_clk_main_set_rate(struct clk *clk, unsigned long rate)
-{
- struct main_clk *mclk = (struct main_clk*)clk;
- int i;
- int div;
- unsigned long parent_rate = jz_clk_pll_get_rate(clk->parent);
-
- rate = jz_clk_main_round_rate(clk, rate);
-
- div = parent_rate / rate;
-
- i = (ffs(div) - 1) << 1;
- if (i > 0 && !(div & BIT(i-1)))
- i -= 1;
-
- jz_clk_reg_write_mask(JZ_REG_CLOCK_CTRL, i << mclk->div_offset,
- 0xf << mclk->div_offset);
-
- return 0;
-}
-
-static struct clk_ops jz_clk_static_ops = {
- .get_rate = jz_clk_static_get_rate,
- .enable = jz_clk_enable_gating,
- .disable = jz_clk_disable_gating,
- .is_enabled = jz_clk_is_enabled_gating,
-};
-
-static struct static_clk jz_clk_ext = {
- .clk = {
- .name = "ext",
- .gate_bit = JZ4740_CLK_NOT_GATED,
- .ops = &jz_clk_static_ops,
- },
-};
-
-static struct clk_ops jz_clk_pll_ops = {
- .get_rate = jz_clk_static_get_rate,
-};
-
-static struct clk jz_clk_pll = {
- .name = "pll",
- .parent = &jz_clk_ext.clk,
- .ops = &jz_clk_pll_ops,
-};
-
-static struct clk_ops jz_clk_pll_half_ops = {
- .get_rate = jz_clk_pll_half_get_rate,
-};
-
-static struct clk jz_clk_pll_half = {
- .name = "pll half",
- .parent = &jz_clk_pll,
- .ops = &jz_clk_pll_half_ops,
-};
-
-static const struct clk_ops jz_clk_main_ops = {
- .get_rate = jz_clk_main_get_rate,
- .set_rate = jz_clk_main_set_rate,
- .round_rate = jz_clk_main_round_rate,
-};
-
-static struct main_clk jz_clk_cpu = {
- .clk = {
- .name = "cclk",
- .parent = &jz_clk_pll,
- .ops = &jz_clk_main_ops,
- },
- .div_offset = JZ_CLOCK_CTRL_CDIV_OFFSET,
-};
-
-static struct main_clk jz_clk_memory = {
- .clk = {
- .name = "mclk",
- .parent = &jz_clk_pll,
- .ops = &jz_clk_main_ops,
- },
- .div_offset = JZ_CLOCK_CTRL_MDIV_OFFSET,
-};
-
-static struct main_clk jz_clk_high_speed_peripheral = {
- .clk = {
- .name = "hclk",
- .parent = &jz_clk_pll,
- .ops = &jz_clk_main_ops,
- },
- .div_offset = JZ_CLOCK_CTRL_HDIV_OFFSET,
-};
-
-
-static struct main_clk jz_clk_low_speed_peripheral = {
- .clk = {
- .name = "pclk",
- .parent = &jz_clk_pll,
- .ops = &jz_clk_main_ops,
- },
- .div_offset = JZ_CLOCK_CTRL_PDIV_OFFSET,
-};
-
-static const struct clk_ops jz_clk_ko_ops = {
- .enable = jz_clk_ko_enable,
- .disable = jz_clk_ko_disable,
- .is_enabled = jz_clk_ko_is_enabled,
-};
-
-static struct clk jz_clk_ko = {
- .name = "cko",
- .parent = &jz_clk_memory.clk,
- .ops = &jz_clk_ko_ops,
-};
-
-static int jz_clk_spi_set_parent(struct clk *clk, struct clk *parent)
-{
- if (parent == &jz_clk_pll)
- jz_clk_reg_set_bits(JZ_CLOCK_SPI_SRC_PLL, JZ_REG_CLOCK_SPI);
- else if(parent == &jz_clk_ext.clk)
- jz_clk_reg_clear_bits(JZ_CLOCK_SPI_SRC_PLL, JZ_REG_CLOCK_SPI);
- else
- return -EINVAL;
-
- clk->parent = parent;
-
- return 0;
-}
-
-static int jz_clk_i2s_set_parent(struct clk *clk, struct clk *parent)
-{
- if (parent == &jz_clk_pll_half)
- jz_clk_reg_set_bits(JZ_REG_CLOCK_CTRL, JZ_CLOCK_CTRL_I2S_SRC_PLL);
- else if(parent == &jz_clk_ext.clk)
- jz_clk_reg_clear_bits(JZ_REG_CLOCK_CTRL, JZ_CLOCK_CTRL_I2S_SRC_PLL);
- else
- return -EINVAL;
-
- clk->parent = parent;
-
- return 0;
-}
-
-static int jz_clk_udc_enable(struct clk *clk)
-{
- jz_clk_reg_set_bits(JZ_REG_CLOCK_SLEEP_CTRL,
- JZ_CLOCK_SLEEP_CTRL_ENABLE_UDC);
-
- return 0;
-}
-
-static int jz_clk_udc_disable(struct clk *clk)
-{
- jz_clk_reg_clear_bits(JZ_REG_CLOCK_SLEEP_CTRL,
- JZ_CLOCK_SLEEP_CTRL_ENABLE_UDC);
-
- return 0;
-}
-
-static int jz_clk_udc_is_enabled(struct clk *clk)
-{
- return !!(jz_clk_reg_read(JZ_REG_CLOCK_SLEEP_CTRL) &
- JZ_CLOCK_SLEEP_CTRL_ENABLE_UDC);
-}
-static int jz_clk_udc_set_parent(struct clk *clk, struct clk *parent)
-{
- if (parent == &jz_clk_pll_half)
- jz_clk_reg_set_bits(JZ_REG_CLOCK_CTRL, JZ_CLOCK_CTRL_UDC_SRC_PLL);
- else if(parent == &jz_clk_ext.clk)
- jz_clk_reg_clear_bits(JZ_REG_CLOCK_CTRL, JZ_CLOCK_CTRL_UDC_SRC_PLL);
- else
- return -EINVAL;
-
- clk->parent = parent;
-
- return 0;
-}
-
-static int jz_clk_udc_set_rate(struct clk *clk, unsigned long rate)
-{
- int div;
-
- if (clk->parent == &jz_clk_ext.clk)
- return -EINVAL;
-
- div = clk_get_rate(clk->parent) / rate - 1;
-
- if (div < 0)
- div = 0;
- else if (div > 63)
- div = 63;
-
- jz_clk_reg_write_mask(JZ_REG_CLOCK_CTRL, div << JZ_CLOCK_CTRL_UDIV_OFFSET,
- JZ_CLOCK_CTRL_UDIV_MASK);
- return 0;
-}
-
-static unsigned long jz_clk_udc_get_rate(struct clk *clk)
-{
- int div;
-
- if (clk->parent == &jz_clk_ext.clk)
- return clk_get_rate(clk->parent);
-
- div = (jz_clk_reg_read(JZ_REG_CLOCK_CTRL) & JZ_CLOCK_CTRL_UDIV_MASK);
- div >>= JZ_CLOCK_CTRL_UDIV_OFFSET;
- div += 1;
-
- return clk_get_rate(clk->parent) / div;
-}
-
-static unsigned long jz_clk_divided_get_rate(struct clk *clk)
-{
- struct divided_clk *dclk = (struct divided_clk*)clk;
- int div;
-
- if (clk->parent == &jz_clk_ext.clk)
- return clk_get_rate(clk->parent);
-
- div = (jz_clk_reg_read(dclk->reg) & dclk->mask) + 1;
-
- return clk_get_rate(clk->parent) / div;
-}
-
-static int jz_clk_divided_set_rate(struct clk *clk, unsigned long rate)
-{
- struct divided_clk *dclk = (struct divided_clk*)clk;
- int div;
-
- if (clk->parent == &jz_clk_ext.clk)
- return -EINVAL;
-
- div = clk_get_rate(clk->parent) / rate - 1;
-
- if (div < 0)
- div = 0;
- else if(div > dclk->mask)
- div = dclk->mask;
-
- jz_clk_reg_write_mask(dclk->reg, div, dclk->mask);
-
- return 0;
-}
-
-static unsigned long jz_clk_ldclk_round_rate(struct clk *clk, unsigned long rate)
-{
- int div;
- unsigned long parent_rate = jz_clk_pll_half_get_rate(clk->parent);
-
- if (rate > 150000000)
- return 150000000;
-
- div = parent_rate / rate;
- if (div < 1)
- div = 1;
- else if(div > 32)
- div = 32;
-
- return parent_rate / div;
-}
-
-static int jz_clk_ldclk_set_rate(struct clk *clk, unsigned long rate)
-{
- int div;
-
- if (rate > 150000000)
- return -EINVAL;
-
- div = jz_clk_pll_half_get_rate(clk->parent) / rate - 1;
- if (div < 0)
- div = 0;
- else if(div > 31)
- div = 31;
-
- jz_clk_reg_write_mask(JZ_REG_CLOCK_CTRL, div << JZ_CLOCK_CTRL_LDIV_OFFSET,
- JZ_CLOCK_CTRL_LDIV_MASK);
-
- return 0;
-}
-
-static unsigned long jz_clk_ldclk_get_rate(struct clk *clk)
-{
- int div;
-
- div = jz_clk_reg_read(JZ_REG_CLOCK_CTRL) & JZ_CLOCK_CTRL_LDIV_MASK;
- div >>= JZ_CLOCK_CTRL_LDIV_OFFSET;
-
- return jz_clk_pll_half_get_rate(clk->parent) / (div + 1);
-}
-
-static const struct clk_ops jz_clk_ops_ld = {
- .set_rate = jz_clk_ldclk_set_rate,
- .get_rate = jz_clk_ldclk_get_rate,
- .round_rate = jz_clk_ldclk_round_rate,
- .enable = jz_clk_enable_gating,
- .disable = jz_clk_disable_gating,
- .is_enabled = jz_clk_is_enabled_gating,
-};
-
-static struct clk jz_clk_ld = {
- .name = "lcd",
- .gate_bit = JZ_CLOCK_GATE_LCD,
- .parent = &jz_clk_pll_half,
- .ops = &jz_clk_ops_ld,
-};
-
-/* TODO: ops!!! */
-static struct clk jz_clk_cim_mclk = {
- .name = "cim_mclk",
- .parent = &jz_clk_high_speed_peripheral.clk,
-};
-
-static struct static_clk jz_clk_cim_pclk = {
- .clk = {
- .name = "cim_pclk",
- .gate_bit = JZ_CLOCK_GATE_CIM,
- .ops = &jz_clk_static_ops,
- },
-};
-
-static const struct clk_ops jz_clk_i2s_ops =
-{
- .set_rate = jz_clk_divided_set_rate,
- .get_rate = jz_clk_divided_get_rate,
- .enable = jz_clk_enable_gating,
- .disable = jz_clk_disable_gating,
- .is_enabled = jz_clk_is_enabled_gating,
- .set_parent = jz_clk_i2s_set_parent,
-};
-
-static const struct clk_ops jz_clk_spi_ops =
-{
- .set_rate = jz_clk_divided_set_rate,
- .get_rate = jz_clk_divided_get_rate,
- .enable = jz_clk_enable_gating,
- .disable = jz_clk_disable_gating,
- .is_enabled = jz_clk_is_enabled_gating,
- .set_parent = jz_clk_spi_set_parent,
-};
-
-static const struct clk_ops jz_clk_divided_ops =
-{
- .set_rate = jz_clk_divided_set_rate,
- .get_rate = jz_clk_divided_get_rate,
- .enable = jz_clk_enable_gating,
- .disable = jz_clk_disable_gating,
- .is_enabled = jz_clk_is_enabled_gating,
-};
-
-static struct divided_clk jz4740_clock_divided_clks[] = {
- {
- .clk = {
- .name = "lcd_pclk",
- .parent = &jz_clk_pll_half,
- .gate_bit = JZ4740_CLK_NOT_GATED,
- .ops = &jz_clk_divided_ops,
- },
- .reg = JZ_REG_CLOCK_LCD,
- .mask = JZ_CLOCK_LCD_DIV_MASK,
- },
- {
- .clk = {
- .name = "i2s",
- .parent = &jz_clk_ext.clk,
- .gate_bit = JZ_CLOCK_GATE_I2S,
- .ops = &jz_clk_i2s_ops,
- },
- .reg = JZ_REG_CLOCK_I2S,
- .mask = JZ_CLOCK_I2S_DIV_MASK,
- },
- {
- .clk = {
- .name = "spi",
- .parent = &jz_clk_ext.clk,
- .gate_bit = JZ_CLOCK_GATE_SPI,
- .ops = &jz_clk_spi_ops,
- },
- .reg = JZ_REG_CLOCK_SPI,
- .mask = JZ_CLOCK_SPI_DIV_MASK,
- },
- {
- .clk = {
- .name = "mmc",
- .parent = &jz_clk_pll_half,
- .gate_bit = JZ_CLOCK_GATE_MMC,
- .ops = &jz_clk_divided_ops,
- },
- .reg = JZ_REG_CLOCK_MMC,
- .mask = JZ_CLOCK_MMC_DIV_MASK,
- },
- {
- .clk = {
- .name = "uhc",
- .parent = &jz_clk_pll_half,
- .gate_bit = JZ_CLOCK_GATE_UHC,
- .ops = &jz_clk_divided_ops,
- },
- .reg = JZ_REG_CLOCK_UHC,
- .mask = JZ_CLOCK_UHC_DIV_MASK,
- },
-};
-
-static const struct clk_ops jz_clk_udc_ops = {
- .set_parent = jz_clk_udc_set_parent,
- .set_rate = jz_clk_udc_set_rate,
- .get_rate = jz_clk_udc_get_rate,
- .enable = jz_clk_udc_enable,
- .disable = jz_clk_udc_disable,
- .is_enabled = jz_clk_udc_is_enabled,
-};
-
-static const struct clk_ops jz_clk_simple_ops = {
- .enable = jz_clk_enable_gating,
- .disable = jz_clk_disable_gating,
- .is_enabled = jz_clk_is_enabled_gating,
-};
-
-static struct clk jz4740_clock_simple_clks[] = {
- {
- .name = "udc",
- .parent = &jz_clk_ext.clk,
- .ops = &jz_clk_udc_ops,
- },
- {
- .name = "uart0",
- .parent = &jz_clk_ext.clk,
- .gate_bit = JZ_CLOCK_GATE_UART0,
- .ops = &jz_clk_simple_ops,
- },
- {
- .name = "uart1",
- .parent = &jz_clk_ext.clk,
- .gate_bit = JZ_CLOCK_GATE_UART1,
- .ops = &jz_clk_simple_ops,
- },
- {
- .name = "dma",
- .parent = &jz_clk_high_speed_peripheral.clk,
- .gate_bit = JZ_CLOCK_GATE_UART0,
- .ops = &jz_clk_simple_ops,
- },
- {
- .name = "ipu",
- .parent = &jz_clk_high_speed_peripheral.clk,
- .gate_bit = JZ_CLOCK_GATE_IPU,
- .ops = &jz_clk_simple_ops,
- },
- {
- .name = "adc",
- .parent = &jz_clk_ext.clk,
- .gate_bit = JZ_CLOCK_GATE_ADC,
- .ops = &jz_clk_simple_ops,
- },
- {
- .name = "i2c",
- .parent = &jz_clk_ext.clk,
- .gate_bit = JZ_CLOCK_GATE_I2C,
- .ops = &jz_clk_simple_ops,
- },
- {
- .name = "aic",
- .parent = &jz_clk_ext.clk,
- .gate_bit = JZ_CLOCK_GATE_AIC,
- .ops = &jz_clk_simple_ops,
- },
-};
-
-static struct static_clk jz_clk_rtc = {
- .clk = {
- .name = "rtc",
- .gate_bit = JZ_CLOCK_GATE_RTC,
- .ops = &jz_clk_static_ops,
- },
- .rate = 32768,
-};
-
-int clk_enable(struct clk *clk)
-{
- if (!clk->ops->enable)
- return -EINVAL;
-
- return clk->ops->enable(clk);
-}
-EXPORT_SYMBOL_GPL(clk_enable);
-
-void clk_disable(struct clk *clk)
-{
- if (clk->ops->disable)
- clk->ops->disable(clk);
-}
-EXPORT_SYMBOL_GPL(clk_disable);
-
-int clk_is_enabled(struct clk *clk)
-{
- if (clk->ops->is_enabled)
- return clk->ops->is_enabled(clk);
-
- return 1;
-}
-
-unsigned long clk_get_rate(struct clk *clk)
-{
- if (clk->ops->get_rate)
- return clk->ops->get_rate(clk);
- if (clk->parent)
- return clk_get_rate(clk->parent);
-
- return -EINVAL;
-}
-EXPORT_SYMBOL_GPL(clk_get_rate);
-
-int clk_set_rate(struct clk *clk, unsigned long rate)
-{
- if (!clk->ops->set_rate)
- return -EINVAL;
- return clk->ops->set_rate(clk, rate);
-}
-EXPORT_SYMBOL_GPL(clk_set_rate);
-
-long clk_round_rate(struct clk *clk, unsigned long rate)
-{
- if (clk->ops->round_rate)
- return clk->ops->round_rate(clk, rate);
-
- return -EINVAL;
-}
-EXPORT_SYMBOL_GPL(clk_round_rate);
-
-int clk_set_parent(struct clk *clk, struct clk *parent)
-{
- int ret;
-
- if (!clk->ops->set_parent)
- return -EINVAL;
-
- clk_disable(clk);
- ret = clk->ops->set_parent(clk, parent);
- clk_enable(clk);
-
- jz4740_clock_debugfs_update_parent(clk);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(clk_set_parent);
-
-struct clk *clk_get(struct device *dev, const char *name)
-{
- struct clk *clk;
-
- list_for_each_entry(clk, &jz_clocks, list) {
- if (strcmp(clk->name, name) == 0)
- return clk;
- }
- return ERR_PTR(-ENOENT);
-}
-EXPORT_SYMBOL_GPL(clk_get);
-
-void clk_put(struct clk *clk)
-{
-}
-EXPORT_SYMBOL_GPL(clk_put);
-
-
-inline static void clk_add(struct clk *clk)
-{
- list_add_tail(&clk->list, &jz_clocks);
-
- jz4740_clock_debugfs_add_clk(clk);
-}
-
-static void clk_register_clks(void)
-{
- size_t i;
-
- clk_add(&jz_clk_ext.clk);
- clk_add(&jz_clk_pll);
- clk_add(&jz_clk_pll_half);
- clk_add(&jz_clk_cpu.clk);
- clk_add(&jz_clk_high_speed_peripheral.clk);
- clk_add(&jz_clk_low_speed_peripheral.clk);
- clk_add(&jz_clk_ko);
- clk_add(&jz_clk_ld);
- clk_add(&jz_clk_cim_mclk);
- clk_add(&jz_clk_cim_pclk.clk);
- clk_add(&jz_clk_rtc.clk);
-
- for (i = 0; i < ARRAY_SIZE(jz4740_clock_divided_clks); ++i)
- clk_add(&jz4740_clock_divided_clks[i].clk);
-
- for (i = 0; i < ARRAY_SIZE(jz4740_clock_simple_clks); ++i)
- clk_add(&jz4740_clock_simple_clks[i]);
-}
-
-void jz4740_clock_set_wait_mode(enum jz4740_wait_mode mode)
-{
- switch (mode) {
- case JZ4740_WAIT_MODE_IDLE:
- jz_clk_reg_clear_bits(JZ_REG_CLOCK_LOW_POWER, JZ_CLOCK_LOW_POWER_MODE_SLEEP);
- break;
- case JZ4740_WAIT_MODE_SLEEP:
- jz_clk_reg_set_bits(JZ_REG_CLOCK_LOW_POWER, JZ_CLOCK_LOW_POWER_MODE_SLEEP);
- break;
- }
-}
-
-void jz4740_clock_udc_disable_auto_suspend(void)
-{
- jz_clk_reg_clear_bits(JZ_REG_CLOCK_GATE, JZ_CLOCK_GATE_UDC);
-}
-EXPORT_SYMBOL_GPL(jz4740_clock_udc_disable_auto_suspend);
-
-void jz4740_clock_udc_enable_auto_suspend(void)
-{
- jz_clk_reg_set_bits(JZ_REG_CLOCK_GATE, JZ_CLOCK_GATE_UDC);
-}
-EXPORT_SYMBOL_GPL(jz4740_clock_udc_enable_auto_suspend);
-
-void jz4740_clock_suspend(void)
-{
- jz_clk_reg_set_bits(JZ_REG_CLOCK_GATE,
- JZ_CLOCK_GATE_TCU | JZ_CLOCK_GATE_DMAC | JZ_CLOCK_GATE_UART0);
-
- jz_clk_reg_clear_bits(JZ_REG_CLOCK_PLL, JZ_CLOCK_PLL_ENABLED);
-}
-
-void jz4740_clock_resume(void)
-{
- jz_clk_reg_set_bits(JZ_REG_CLOCK_PLL, JZ_CLOCK_PLL_ENABLED);
- while ((jz_clk_reg_read(JZ_REG_CLOCK_PLL) & JZ_CLOCK_PLL_STABLE) == 0);
-
- jz_clk_reg_clear_bits(JZ_REG_CLOCK_GATE,
- JZ_CLOCK_GATE_TCU | JZ_CLOCK_GATE_DMAC | JZ_CLOCK_GATE_UART0);
-}
-
-int jz4740_clock_init(void)
-{
- uint32_t val;
-
- jz_clock_base = ioremap(CPHYSADDR(CPM_BASE), 0x100);
- if (!jz_clock_base)
- return -EBUSY;
-
- spin_lock_init(&jz_clock_lock);
-
- jz_clk_ext.rate = jz4740_clock_bdata.ext_rate;
- jz_clk_rtc.rate = jz4740_clock_bdata.rtc_rate;
-
- val = jz_clk_reg_read(JZ_REG_CLOCK_SPI);
-
- if (val & JZ_CLOCK_SPI_SRC_PLL)
- jz4740_clock_divided_clks[1].clk.parent = &jz_clk_pll_half;
-
- val = jz_clk_reg_read(JZ_REG_CLOCK_CTRL);
-
- if (val & JZ_CLOCK_CTRL_I2S_SRC_PLL)
- jz4740_clock_divided_clks[0].clk.parent = &jz_clk_pll_half;
-
- if (val & JZ_CLOCK_CTRL_UDC_SRC_PLL)
- jz4740_clock_simple_clks[0].parent = &jz_clk_pll_half;
-
- jz4740_clock_debugfs_init();
-
- clk_register_clks();
-
- return 0;
-}
projects / 10.03 / openwrt.git / blobdiff