diff options
Diffstat (limited to 'arch/arm/mach-s3c24xx/clock-s3c2440.c')
| -rw-r--r-- | arch/arm/mach-s3c24xx/clock-s3c2440.c | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/arch/arm/mach-s3c24xx/clock-s3c2440.c b/arch/arm/mach-s3c24xx/clock-s3c2440.c deleted file mode 100644 index 5527226..0000000 --- a/arch/arm/mach-s3c24xx/clock-s3c2440.c +++ /dev/null @@ -1,217 +0,0 @@ -/* linux/arch/arm/mach-s3c2440/clock.c - * - * Copyright (c) 2004-2005 Simtec Electronics - * http://armlinux.simtec.co.uk/ - * Ben Dooks <ben@simtec.co.uk> - * - * S3C2440 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. - * - * 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 -*/ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/list.h> -#include <linux/errno.h> -#include <linux/err.h> -#include <linux/device.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/mutex.h> -#include <linux/clk.h> -#include <linux/io.h> -#include <linux/serial_core.h> -#include <linux/serial_s3c.h> - -#include <mach/hardware.h> -#include <linux/atomic.h> -#include <asm/irq.h> - -#include <mach/regs-clock.h> - -#include <plat/clock.h> -#include <plat/cpu.h> - -/* S3C2440 extended clock support */ - -static unsigned long s3c2440_camif_upll_round(struct clk *clk, - unsigned long rate) -{ - unsigned long parent_rate = clk_get_rate(clk->parent); - int div; - - if (rate > parent_rate) - return parent_rate; - - /* note, we remove the +/- 1 calculations for the divisor */ - - div = (parent_rate / rate) / 2; - - if (div < 1) - div = 1; - else if (div > 16) - div = 16; - - return parent_rate / (div * 2); -} - -static int s3c2440_camif_upll_setrate(struct clk *clk, unsigned long rate) -{ - unsigned long parent_rate = clk_get_rate(clk->parent); - unsigned long camdivn = __raw_readl(S3C2440_CAMDIVN); - - rate = s3c2440_camif_upll_round(clk, rate); - - camdivn &= ~(S3C2440_CAMDIVN_CAMCLK_SEL | S3C2440_CAMDIVN_CAMCLK_MASK); - - if (rate != parent_rate) { - camdivn |= S3C2440_CAMDIVN_CAMCLK_SEL; - camdivn |= (((parent_rate / rate) / 2) - 1); - } - - __raw_writel(camdivn, S3C2440_CAMDIVN); - - return 0; -} - -static unsigned long s3c2440_camif_upll_getrate(struct clk *clk) -{ - unsigned long parent_rate = clk_get_rate(clk->parent); - unsigned long camdivn = __raw_readl(S3C2440_CAMDIVN); - - if (!(camdivn & S3C2440_CAMDIVN_CAMCLK_SEL)) - return parent_rate; - - camdivn &= S3C2440_CAMDIVN_CAMCLK_MASK; - - return parent_rate / (camdivn + 1) / 2; -} - -/* Extra S3C2440 clocks */ - -static struct clk s3c2440_clk_cam = { - .name = "camif", - .enable = s3c2410_clkcon_enable, - .ctrlbit = S3C2440_CLKCON_CAMERA, -}; - -static struct clk s3c2440_clk_cam_upll = { - .name = "camif-upll", - .ops = &(struct clk_ops) { - .set_rate = s3c2440_camif_upll_setrate, - .get_rate = s3c2440_camif_upll_getrate, - .round_rate = s3c2440_camif_upll_round, - }, -}; - -static struct clk s3c2440_clk_ac97 = { - .name = "ac97", - .enable = s3c2410_clkcon_enable, - .ctrlbit = S3C2440_CLKCON_AC97, -}; - -#define S3C24XX_VA_UART0 (S3C_VA_UART) -#define S3C24XX_VA_UART1 (S3C_VA_UART + 0x4000 ) -#define S3C24XX_VA_UART2 (S3C_VA_UART + 0x8000 ) -#define S3C24XX_VA_UART3 (S3C_VA_UART + 0xC000 ) - -static unsigned long s3c2440_fclk_n_getrate(struct clk *clk) -{ - unsigned long ucon0, ucon1, ucon2, divisor; - - /* the fun of calculating the uart divisors on the s3c2440 */ - ucon0 = __raw_readl(S3C24XX_VA_UART0 + S3C2410_UCON); - ucon1 = __raw_readl(S3C24XX_VA_UART1 + S3C2410_UCON); - ucon2 = __raw_readl(S3C24XX_VA_UART2 + S3C2410_UCON); - - ucon0 &= S3C2440_UCON0_DIVMASK; - ucon1 &= S3C2440_UCON1_DIVMASK; - ucon2 &= S3C2440_UCON2_DIVMASK; - - if (ucon0 != 0) - divisor = (ucon0 >> S3C2440_UCON_DIVSHIFT) + 6; - else if (ucon1 != 0) - divisor = (ucon1 >> S3C2440_UCON_DIVSHIFT) + 21; - else if (ucon2 != 0) - divisor = (ucon2 >> S3C2440_UCON_DIVSHIFT) + 36; - else - /* manual calims 44, seems to be 9 */ - divisor = 9; - - return clk_get_rate(clk->parent) / divisor; -} - -static struct clk s3c2440_clk_fclk_n = { - .name = "fclk_n", - .parent = &clk_f, - .ops = &(struct clk_ops) { - .get_rate = s3c2440_fclk_n_getrate, - }, -}; - -static struct clk_lookup s3c2440_clk_lookup[] = { - CLKDEV_INIT(NULL, "clk_uart_baud1", &s3c24xx_uclk), - CLKDEV_INIT(NULL, "clk_uart_baud2", &clk_p), - CLKDEV_INIT(NULL, "clk_uart_baud3", &s3c2440_clk_fclk_n), - CLKDEV_INIT("s3c2440-uart.0", "uart", &s3c24xx_clk_uart0), - CLKDEV_INIT("s3c2440-uart.1", "uart", &s3c24xx_clk_uart1), - CLKDEV_INIT("s3c2440-uart.2", "uart", &s3c24xx_clk_uart2), - CLKDEV_INIT("s3c2440-camif", "camera", &s3c2440_clk_cam_upll), -}; - -static int __init_refok s3c2440_clk_add(struct device *dev, struct subsys_interface *sif) -{ - struct clk *clock_upll; - struct clk *clock_h; - struct clk *clock_p; - - clock_p = clk_get(NULL, "pclk"); - clock_h = clk_get(NULL, "hclk"); - clock_upll = clk_get(NULL, "upll"); - - if (IS_ERR(clock_p) || IS_ERR(clock_h) || IS_ERR(clock_upll)) { - printk(KERN_ERR "S3C2440: Failed to get parent clocks\n"); - return -EINVAL; - } - - s3c2440_clk_cam.parent = clock_h; - s3c2440_clk_ac97.parent = clock_p; - s3c2440_clk_cam_upll.parent = clock_upll; - s3c24xx_register_clock(&s3c2440_clk_fclk_n); - - s3c24xx_register_clock(&s3c2440_clk_ac97); - s3c24xx_register_clock(&s3c2440_clk_cam); - s3c24xx_register_clock(&s3c2440_clk_cam_upll); - clkdev_add_table(s3c2440_clk_lookup, ARRAY_SIZE(s3c2440_clk_lookup)); - - clk_disable(&s3c2440_clk_ac97); - clk_disable(&s3c2440_clk_cam); - - return 0; -} - -static struct subsys_interface s3c2440_clk_interface = { - .name = "s3c2440_clk", - .subsys = &s3c2440_subsys, - .add_dev = s3c2440_clk_add, -}; - -static __init int s3c24xx_clk_init(void) -{ - return subsys_interface_register(&s3c2440_clk_interface); -} - -arch_initcall(s3c24xx_clk_init); |
