Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 1 | /* linux/arch/arm/mach-s3c2442/s3c2442.c |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 2 | * |
Ben Dooks | 491547d | 2010-01-26 16:13:35 +0900 | [diff] [blame] | 3 | * Copyright (c) 2004-2005 Simtec Electronics |
| 4 | * http://armlinux.simtec.co.uk/ |
| 5 | * Ben Dooks <ben@simtec.co.uk> |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 6 | * |
Ben Dooks | 491547d | 2010-01-26 16:13:35 +0900 | [diff] [blame] | 7 | * S3C2442 core and lock support |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
Ben Dooks | 491547d | 2010-01-26 16:13:35 +0900 | [diff] [blame] | 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 22 | */ |
| 23 | |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 24 | #include <linux/init.h> |
Ben Dooks | 491547d | 2010-01-26 16:13:35 +0900 | [diff] [blame] | 25 | #include <linux/module.h> |
| 26 | #include <linux/kernel.h> |
| 27 | #include <linux/list.h> |
| 28 | #include <linux/errno.h> |
| 29 | #include <linux/err.h> |
| 30 | #include <linux/device.h> |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 31 | #include <linux/sysdev.h> |
Rafael J. Wysocki | bb072c3 | 2011-04-22 22:03:21 +0200 | [diff] [blame] | 32 | #include <linux/syscore_ops.h> |
Ben Dooks | 491547d | 2010-01-26 16:13:35 +0900 | [diff] [blame] | 33 | #include <linux/interrupt.h> |
| 34 | #include <linux/ioport.h> |
| 35 | #include <linux/mutex.h> |
Vasily Khoruzhick | 812c4e4 | 2010-12-01 08:29:23 +0200 | [diff] [blame] | 36 | #include <linux/gpio.h> |
Ben Dooks | 491547d | 2010-01-26 16:13:35 +0900 | [diff] [blame] | 37 | #include <linux/clk.h> |
| 38 | #include <linux/io.h> |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 39 | |
Ben Dooks | 491547d | 2010-01-26 16:13:35 +0900 | [diff] [blame] | 40 | #include <mach/hardware.h> |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 41 | #include <linux/atomic.h> |
Ben Dooks | 491547d | 2010-01-26 16:13:35 +0900 | [diff] [blame] | 42 | #include <asm/irq.h> |
| 43 | |
| 44 | #include <mach/regs-clock.h> |
| 45 | |
| 46 | #include <plat/clock.h> |
Ben Dooks | a2b7ba9 | 2008-10-07 22:26:09 +0100 | [diff] [blame] | 47 | #include <plat/cpu.h> |
Vasily Khoruzhick | 812c4e4 | 2010-12-01 08:29:23 +0200 | [diff] [blame] | 48 | #include <plat/s3c244x.h> |
Rafael J. Wysocki | bb072c3 | 2011-04-22 22:03:21 +0200 | [diff] [blame] | 49 | #include <plat/pm.h> |
Vasily Khoruzhick | 812c4e4 | 2010-12-01 08:29:23 +0200 | [diff] [blame] | 50 | |
| 51 | #include <plat/gpio-core.h> |
| 52 | #include <plat/gpio-cfg.h> |
| 53 | #include <plat/gpio-cfg-helpers.h> |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 54 | |
Ben Dooks | 491547d | 2010-01-26 16:13:35 +0900 | [diff] [blame] | 55 | /* S3C2442 extended clock support */ |
| 56 | |
| 57 | static unsigned long s3c2442_camif_upll_round(struct clk *clk, |
| 58 | unsigned long rate) |
| 59 | { |
| 60 | unsigned long parent_rate = clk_get_rate(clk->parent); |
| 61 | int div; |
| 62 | |
| 63 | if (rate > parent_rate) |
| 64 | return parent_rate; |
| 65 | |
| 66 | div = parent_rate / rate; |
| 67 | |
| 68 | if (div == 3) |
| 69 | return parent_rate / 3; |
| 70 | |
| 71 | /* note, we remove the +/- 1 calculations for the divisor */ |
| 72 | |
| 73 | div /= 2; |
| 74 | |
| 75 | if (div < 1) |
| 76 | div = 1; |
| 77 | else if (div > 16) |
| 78 | div = 16; |
| 79 | |
| 80 | return parent_rate / (div * 2); |
| 81 | } |
| 82 | |
| 83 | static int s3c2442_camif_upll_setrate(struct clk *clk, unsigned long rate) |
| 84 | { |
| 85 | unsigned long parent_rate = clk_get_rate(clk->parent); |
| 86 | unsigned long camdivn = __raw_readl(S3C2440_CAMDIVN); |
| 87 | |
| 88 | rate = s3c2442_camif_upll_round(clk, rate); |
| 89 | |
| 90 | camdivn &= ~S3C2442_CAMDIVN_CAMCLK_DIV3; |
| 91 | |
| 92 | if (rate == parent_rate) { |
| 93 | camdivn &= ~S3C2440_CAMDIVN_CAMCLK_SEL; |
| 94 | } else if ((parent_rate / rate) == 3) { |
| 95 | camdivn |= S3C2440_CAMDIVN_CAMCLK_SEL; |
| 96 | camdivn |= S3C2442_CAMDIVN_CAMCLK_DIV3; |
| 97 | } else { |
| 98 | camdivn &= ~S3C2440_CAMDIVN_CAMCLK_MASK; |
| 99 | camdivn |= S3C2440_CAMDIVN_CAMCLK_SEL; |
| 100 | camdivn |= (((parent_rate / rate) / 2) - 1); |
| 101 | } |
| 102 | |
| 103 | __raw_writel(camdivn, S3C2440_CAMDIVN); |
| 104 | |
| 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | /* Extra S3C2442 clocks */ |
| 109 | |
| 110 | static struct clk s3c2442_clk_cam = { |
| 111 | .name = "camif", |
| 112 | .id = -1, |
| 113 | .enable = s3c2410_clkcon_enable, |
| 114 | .ctrlbit = S3C2440_CLKCON_CAMERA, |
| 115 | }; |
| 116 | |
| 117 | static struct clk s3c2442_clk_cam_upll = { |
| 118 | .name = "camif-upll", |
| 119 | .id = -1, |
| 120 | .ops = &(struct clk_ops) { |
| 121 | .set_rate = s3c2442_camif_upll_setrate, |
| 122 | .round_rate = s3c2442_camif_upll_round, |
| 123 | }, |
| 124 | }; |
| 125 | |
| 126 | static int s3c2442_clk_add(struct sys_device *sysdev) |
| 127 | { |
| 128 | struct clk *clock_upll; |
| 129 | struct clk *clock_h; |
| 130 | struct clk *clock_p; |
| 131 | |
| 132 | clock_p = clk_get(NULL, "pclk"); |
| 133 | clock_h = clk_get(NULL, "hclk"); |
| 134 | clock_upll = clk_get(NULL, "upll"); |
| 135 | |
| 136 | if (IS_ERR(clock_p) || IS_ERR(clock_h) || IS_ERR(clock_upll)) { |
| 137 | printk(KERN_ERR "S3C2442: Failed to get parent clocks\n"); |
| 138 | return -EINVAL; |
| 139 | } |
| 140 | |
| 141 | s3c2442_clk_cam.parent = clock_h; |
| 142 | s3c2442_clk_cam_upll.parent = clock_upll; |
| 143 | |
| 144 | s3c24xx_register_clock(&s3c2442_clk_cam); |
| 145 | s3c24xx_register_clock(&s3c2442_clk_cam_upll); |
| 146 | |
| 147 | clk_disable(&s3c2442_clk_cam); |
| 148 | |
| 149 | return 0; |
| 150 | } |
| 151 | |
| 152 | static struct sysdev_driver s3c2442_clk_driver = { |
| 153 | .add = s3c2442_clk_add, |
| 154 | }; |
| 155 | |
| 156 | static __init int s3c2442_clk_init(void) |
| 157 | { |
| 158 | return sysdev_driver_register(&s3c2442_sysclass, &s3c2442_clk_driver); |
| 159 | } |
| 160 | |
| 161 | arch_initcall(s3c2442_clk_init); |
| 162 | |
| 163 | |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 164 | static struct sys_device s3c2442_sysdev = { |
| 165 | .cls = &s3c2442_sysclass, |
| 166 | }; |
| 167 | |
| 168 | int __init s3c2442_init(void) |
| 169 | { |
| 170 | printk("S3C2442: Initialising architecture\n"); |
| 171 | |
Rafael J. Wysocki | bb072c3 | 2011-04-22 22:03:21 +0200 | [diff] [blame] | 172 | register_syscore_ops(&s3c2410_pm_syscore_ops); |
| 173 | register_syscore_ops(&s3c244x_pm_syscore_ops); |
| 174 | register_syscore_ops(&s3c24xx_irq_syscore_ops); |
| 175 | |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 176 | return sysdev_register(&s3c2442_sysdev); |
| 177 | } |
Vasily Khoruzhick | 812c4e4 | 2010-12-01 08:29:23 +0200 | [diff] [blame] | 178 | |
| 179 | void __init s3c2442_map_io(void) |
| 180 | { |
| 181 | s3c244x_map_io(); |
| 182 | |
| 183 | s3c24xx_gpiocfg_default.set_pull = s3c_gpio_setpull_1down; |
| 184 | s3c24xx_gpiocfg_default.get_pull = s3c_gpio_getpull_1down; |
| 185 | } |