Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/plat-omap/dmtimer.c |
| 3 | * |
| 4 | * OMAP Dual-Mode Timers |
| 5 | * |
Tarun Kanti DebBarma | 97933d6 | 2011-09-20 17:00:17 +0530 | [diff] [blame] | 6 | * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/ |
| 7 | * Tarun Kanti DebBarma <tarun.kanti@ti.com> |
| 8 | * Thara Gopinath <thara@ti.com> |
| 9 | * |
| 10 | * dmtimer adaptation to platform_driver. |
| 11 | * |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 12 | * Copyright (C) 2005 Nokia Corporation |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 13 | * OMAP2 support by Juha Yrjola |
| 14 | * API improvements and OMAP2 clock framework support by Timo Teras |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 15 | * |
Santosh Shilimkar | 4416907 | 2009-05-28 14:16:04 -0700 | [diff] [blame] | 16 | * Copyright (C) 2009 Texas Instruments |
| 17 | * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com> |
| 18 | * |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 19 | * This program is free software; you can redistribute it and/or modify it |
| 20 | * under the terms of the GNU General Public License as published by the |
| 21 | * Free Software Foundation; either version 2 of the License, or (at your |
| 22 | * option) any later version. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 25 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 26 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| 27 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 28 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 29 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 30 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 31 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | * |
| 33 | * You should have received a copy of the GNU General Public License along |
| 34 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 35 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 36 | */ |
| 37 | |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 38 | #include <linux/io.h> |
Tarun Kanti DebBarma | df28472 | 2011-09-20 17:00:19 +0530 | [diff] [blame] | 39 | #include <linux/slab.h> |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 40 | #include <linux/err.h> |
| 41 | |
Tony Lindgren | ce491cf | 2009-10-20 09:40:47 -0700 | [diff] [blame] | 42 | #include <plat/dmtimer.h> |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 43 | |
Tarun Kanti DebBarma | df28472 | 2011-09-20 17:00:19 +0530 | [diff] [blame] | 44 | static LIST_HEAD(omap_timer_list); |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 45 | static DEFINE_SPINLOCK(dm_timer_lock); |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 46 | |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 47 | /** |
| 48 | * omap_dm_timer_read_reg - read timer registers in posted and non-posted mode |
| 49 | * @timer: timer pointer over which read operation to perform |
| 50 | * @reg: lowest byte holds the register offset |
| 51 | * |
| 52 | * The posted mode bit is encoded in reg. Note that in posted mode write |
| 53 | * pending bit must be checked. Otherwise a read of a non completed write |
| 54 | * will produce an error. |
Richard Woodruff | 0f0d080 | 2008-07-03 12:24:30 +0300 | [diff] [blame] | 55 | */ |
| 56 | static inline u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, u32 reg) |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 57 | { |
Tony Lindgren | ee17f11 | 2011-09-16 15:44:20 -0700 | [diff] [blame] | 58 | WARN_ON((reg & 0xff) < _OMAP_TIMER_WAKEUP_EN_OFFSET); |
| 59 | return __omap_dm_timer_read(timer, reg, timer->posted); |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 60 | } |
| 61 | |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 62 | /** |
| 63 | * omap_dm_timer_write_reg - write timer registers in posted and non-posted mode |
| 64 | * @timer: timer pointer over which write operation is to perform |
| 65 | * @reg: lowest byte holds the register offset |
| 66 | * @value: data to write into the register |
| 67 | * |
| 68 | * The posted mode bit is encoded in reg. Note that in posted mode the write |
| 69 | * pending bit must be checked. Otherwise a write on a register which has a |
| 70 | * pending write will be lost. |
Richard Woodruff | 0f0d080 | 2008-07-03 12:24:30 +0300 | [diff] [blame] | 71 | */ |
| 72 | static void omap_dm_timer_write_reg(struct omap_dm_timer *timer, u32 reg, |
| 73 | u32 value) |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 74 | { |
Tony Lindgren | ee17f11 | 2011-09-16 15:44:20 -0700 | [diff] [blame] | 75 | WARN_ON((reg & 0xff) < _OMAP_TIMER_WAKEUP_EN_OFFSET); |
| 76 | __omap_dm_timer_write(timer, reg, value, timer->posted); |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 77 | } |
| 78 | |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 79 | static void omap_dm_timer_wait_for_reset(struct omap_dm_timer *timer) |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 80 | { |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 81 | int c; |
| 82 | |
Tony Lindgren | ee17f11 | 2011-09-16 15:44:20 -0700 | [diff] [blame] | 83 | if (!timer->sys_stat) |
| 84 | return; |
| 85 | |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 86 | c = 0; |
Tony Lindgren | ee17f11 | 2011-09-16 15:44:20 -0700 | [diff] [blame] | 87 | while (!(__raw_readl(timer->sys_stat) & 1)) { |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 88 | c++; |
| 89 | if (c > 100000) { |
| 90 | printk(KERN_ERR "Timer failed to reset\n"); |
| 91 | return; |
| 92 | } |
| 93 | } |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 94 | } |
| 95 | |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 96 | static void omap_dm_timer_reset(struct omap_dm_timer *timer) |
| 97 | { |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 98 | if (timer->pdev->id != 1) { |
Timo Teras | e32f7ec | 2006-06-26 16:16:13 -0700 | [diff] [blame] | 99 | omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG, 0x06); |
| 100 | omap_dm_timer_wait_for_reset(timer); |
| 101 | } |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 102 | |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 103 | __omap_dm_timer_reset(timer, 0, 0); |
Richard Woodruff | 0f0d080 | 2008-07-03 12:24:30 +0300 | [diff] [blame] | 104 | timer->posted = 1; |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 105 | } |
| 106 | |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 107 | int omap_dm_timer_prepare(struct omap_dm_timer *timer) |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 108 | { |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 109 | struct dmtimer_platform_data *pdata = timer->pdev->dev.platform_data; |
| 110 | int ret; |
| 111 | |
| 112 | timer->fclk = clk_get(&timer->pdev->dev, "fck"); |
| 113 | if (WARN_ON_ONCE(IS_ERR_OR_NULL(timer->fclk))) { |
| 114 | timer->fclk = NULL; |
| 115 | dev_err(&timer->pdev->dev, ": No fclk handle.\n"); |
| 116 | return -EINVAL; |
| 117 | } |
| 118 | |
Timo Teras | 12583a7 | 2006-09-25 12:41:42 +0300 | [diff] [blame] | 119 | omap_dm_timer_enable(timer); |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 120 | |
| 121 | if (pdata->needs_manual_reset) |
| 122 | omap_dm_timer_reset(timer); |
| 123 | |
| 124 | ret = omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_32_KHZ); |
| 125 | |
| 126 | timer->posted = 1; |
| 127 | return ret; |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 128 | } |
| 129 | |
| 130 | struct omap_dm_timer *omap_dm_timer_request(void) |
| 131 | { |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 132 | struct omap_dm_timer *timer = NULL, *t; |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 133 | unsigned long flags; |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 134 | int ret = 0; |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 135 | |
| 136 | spin_lock_irqsave(&dm_timer_lock, flags); |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 137 | list_for_each_entry(t, &omap_timer_list, node) { |
| 138 | if (t->reserved) |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 139 | continue; |
| 140 | |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 141 | timer = t; |
Timo Teras | 83379c8 | 2006-06-26 16:16:23 -0700 | [diff] [blame] | 142 | timer->reserved = 1; |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 143 | break; |
| 144 | } |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 145 | |
| 146 | if (timer) { |
| 147 | ret = omap_dm_timer_prepare(timer); |
| 148 | if (ret) { |
| 149 | timer->reserved = 0; |
| 150 | timer = NULL; |
| 151 | } |
| 152 | } |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 153 | spin_unlock_irqrestore(&dm_timer_lock, flags); |
| 154 | |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 155 | if (!timer) |
| 156 | pr_debug("%s: timer request failed!\n", __func__); |
Timo Teras | 83379c8 | 2006-06-26 16:16:23 -0700 | [diff] [blame] | 157 | |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 158 | return timer; |
| 159 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 160 | EXPORT_SYMBOL_GPL(omap_dm_timer_request); |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 161 | |
| 162 | struct omap_dm_timer *omap_dm_timer_request_specific(int id) |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 163 | { |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 164 | struct omap_dm_timer *timer = NULL, *t; |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 165 | unsigned long flags; |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 166 | int ret = 0; |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 167 | |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 168 | spin_lock_irqsave(&dm_timer_lock, flags); |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 169 | list_for_each_entry(t, &omap_timer_list, node) { |
| 170 | if (t->pdev->id == id && !t->reserved) { |
| 171 | timer = t; |
| 172 | timer->reserved = 1; |
| 173 | break; |
| 174 | } |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 175 | } |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 176 | |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 177 | if (timer) { |
| 178 | ret = omap_dm_timer_prepare(timer); |
| 179 | if (ret) { |
| 180 | timer->reserved = 0; |
| 181 | timer = NULL; |
| 182 | } |
| 183 | } |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 184 | spin_unlock_irqrestore(&dm_timer_lock, flags); |
| 185 | |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 186 | if (!timer) |
| 187 | pr_debug("%s: timer%d request failed!\n", __func__, id); |
Timo Teras | 83379c8 | 2006-06-26 16:16:23 -0700 | [diff] [blame] | 188 | |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 189 | return timer; |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 190 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 191 | EXPORT_SYMBOL_GPL(omap_dm_timer_request_specific); |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 192 | |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 193 | void omap_dm_timer_free(struct omap_dm_timer *timer) |
| 194 | { |
Timo Teras | 12583a7 | 2006-09-25 12:41:42 +0300 | [diff] [blame] | 195 | omap_dm_timer_disable(timer); |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 196 | clk_put(timer->fclk); |
Timo Teras | fa4bb62 | 2006-09-25 12:41:35 +0300 | [diff] [blame] | 197 | |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 198 | WARN_ON(!timer->reserved); |
| 199 | timer->reserved = 0; |
| 200 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 201 | EXPORT_SYMBOL_GPL(omap_dm_timer_free); |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 202 | |
Timo Teras | 12583a7 | 2006-09-25 12:41:42 +0300 | [diff] [blame] | 203 | void omap_dm_timer_enable(struct omap_dm_timer *timer) |
| 204 | { |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 205 | struct dmtimer_platform_data *pdata = timer->pdev->dev.platform_data; |
| 206 | |
Timo Teras | 12583a7 | 2006-09-25 12:41:42 +0300 | [diff] [blame] | 207 | if (timer->enabled) |
| 208 | return; |
| 209 | |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 210 | if (!pdata->needs_manual_reset) { |
Tony Lindgren | 882c051 | 2010-02-12 12:26:46 -0800 | [diff] [blame] | 211 | clk_enable(timer->fclk); |
| 212 | clk_enable(timer->iclk); |
| 213 | } |
Timo Teras | 12583a7 | 2006-09-25 12:41:42 +0300 | [diff] [blame] | 214 | |
| 215 | timer->enabled = 1; |
| 216 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 217 | EXPORT_SYMBOL_GPL(omap_dm_timer_enable); |
Timo Teras | 12583a7 | 2006-09-25 12:41:42 +0300 | [diff] [blame] | 218 | |
| 219 | void omap_dm_timer_disable(struct omap_dm_timer *timer) |
| 220 | { |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 221 | struct dmtimer_platform_data *pdata = timer->pdev->dev.platform_data; |
| 222 | |
Timo Teras | 12583a7 | 2006-09-25 12:41:42 +0300 | [diff] [blame] | 223 | if (!timer->enabled) |
| 224 | return; |
| 225 | |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 226 | if (!pdata->needs_manual_reset) { |
Tony Lindgren | 882c051 | 2010-02-12 12:26:46 -0800 | [diff] [blame] | 227 | clk_disable(timer->iclk); |
| 228 | clk_disable(timer->fclk); |
| 229 | } |
Timo Teras | 12583a7 | 2006-09-25 12:41:42 +0300 | [diff] [blame] | 230 | |
| 231 | timer->enabled = 0; |
| 232 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 233 | EXPORT_SYMBOL_GPL(omap_dm_timer_disable); |
Timo Teras | 12583a7 | 2006-09-25 12:41:42 +0300 | [diff] [blame] | 234 | |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 235 | int omap_dm_timer_get_irq(struct omap_dm_timer *timer) |
| 236 | { |
| 237 | return timer->irq; |
| 238 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 239 | EXPORT_SYMBOL_GPL(omap_dm_timer_get_irq); |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 240 | |
| 241 | #if defined(CONFIG_ARCH_OMAP1) |
| 242 | |
Tony Lindgren | a569c6e | 2006-04-02 17:46:21 +0100 | [diff] [blame] | 243 | /** |
| 244 | * omap_dm_timer_modify_idlect_mask - Check if any running timers use ARMXOR |
| 245 | * @inputmask: current value of idlect mask |
| 246 | */ |
| 247 | __u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask) |
| 248 | { |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 249 | int i = 0; |
| 250 | struct omap_dm_timer *timer = NULL; |
| 251 | unsigned long flags; |
Tony Lindgren | a569c6e | 2006-04-02 17:46:21 +0100 | [diff] [blame] | 252 | |
| 253 | /* If ARMXOR cannot be idled this function call is unnecessary */ |
| 254 | if (!(inputmask & (1 << 1))) |
| 255 | return inputmask; |
| 256 | |
| 257 | /* If any active timer is using ARMXOR return modified mask */ |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 258 | spin_lock_irqsave(&dm_timer_lock, flags); |
| 259 | list_for_each_entry(timer, &omap_timer_list, node) { |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 260 | u32 l; |
| 261 | |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 262 | l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 263 | if (l & OMAP_TIMER_CTRL_ST) { |
| 264 | if (((omap_readl(MOD_CONF_CTRL_1) >> (i * 2)) & 0x03) == 0) |
Tony Lindgren | a569c6e | 2006-04-02 17:46:21 +0100 | [diff] [blame] | 265 | inputmask &= ~(1 << 1); |
| 266 | else |
| 267 | inputmask &= ~(1 << 2); |
| 268 | } |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 269 | i++; |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 270 | } |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 271 | spin_unlock_irqrestore(&dm_timer_lock, flags); |
Tony Lindgren | a569c6e | 2006-04-02 17:46:21 +0100 | [diff] [blame] | 272 | |
| 273 | return inputmask; |
| 274 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 275 | EXPORT_SYMBOL_GPL(omap_dm_timer_modify_idlect_mask); |
Tony Lindgren | a569c6e | 2006-04-02 17:46:21 +0100 | [diff] [blame] | 276 | |
Tony Lindgren | 140455f | 2010-02-12 12:26:48 -0800 | [diff] [blame] | 277 | #else |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 278 | |
| 279 | struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer) |
| 280 | { |
Timo Teras | fa4bb62 | 2006-09-25 12:41:35 +0300 | [diff] [blame] | 281 | return timer->fclk; |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 282 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 283 | EXPORT_SYMBOL_GPL(omap_dm_timer_get_fclk); |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 284 | |
| 285 | __u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask) |
| 286 | { |
| 287 | BUG(); |
Dirk Behme | 2121880 | 2006-12-06 17:14:00 -0800 | [diff] [blame] | 288 | |
| 289 | return 0; |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 290 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 291 | EXPORT_SYMBOL_GPL(omap_dm_timer_modify_idlect_mask); |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 292 | |
| 293 | #endif |
| 294 | |
| 295 | void omap_dm_timer_trigger(struct omap_dm_timer *timer) |
| 296 | { |
| 297 | omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0); |
| 298 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 299 | EXPORT_SYMBOL_GPL(omap_dm_timer_trigger); |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 300 | |
| 301 | void omap_dm_timer_start(struct omap_dm_timer *timer) |
| 302 | { |
| 303 | u32 l; |
| 304 | |
| 305 | l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); |
| 306 | if (!(l & OMAP_TIMER_CTRL_ST)) { |
| 307 | l |= OMAP_TIMER_CTRL_ST; |
| 308 | omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l); |
| 309 | } |
| 310 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 311 | EXPORT_SYMBOL_GPL(omap_dm_timer_start); |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 312 | |
| 313 | void omap_dm_timer_stop(struct omap_dm_timer *timer) |
| 314 | { |
Tony Lindgren | caf64f2 | 2011-03-29 15:54:48 -0700 | [diff] [blame] | 315 | unsigned long rate = 0; |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 316 | struct dmtimer_platform_data *pdata = timer->pdev->dev.platform_data; |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 317 | |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 318 | if (!pdata->needs_manual_reset) |
| 319 | rate = clk_get_rate(timer->fclk); |
Tony Lindgren | caf64f2 | 2011-03-29 15:54:48 -0700 | [diff] [blame] | 320 | |
Tony Lindgren | ee17f11 | 2011-09-16 15:44:20 -0700 | [diff] [blame] | 321 | __omap_dm_timer_stop(timer, timer->posted, rate); |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 322 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 323 | EXPORT_SYMBOL_GPL(omap_dm_timer_stop); |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 324 | |
Paul Walmsley | f248076 | 2009-04-23 21:11:10 -0600 | [diff] [blame] | 325 | int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source) |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 326 | { |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 327 | int ret; |
| 328 | struct dmtimer_platform_data *pdata = timer->pdev->dev.platform_data; |
| 329 | |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 330 | if (source < 0 || source >= 3) |
Paul Walmsley | f248076 | 2009-04-23 21:11:10 -0600 | [diff] [blame] | 331 | return -EINVAL; |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 332 | |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 333 | omap_dm_timer_disable(timer); |
| 334 | ret = pdata->set_timer_src(timer->pdev, source); |
| 335 | omap_dm_timer_enable(timer); |
| 336 | |
| 337 | return ret; |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 338 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 339 | EXPORT_SYMBOL_GPL(omap_dm_timer_set_source); |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 340 | |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 341 | void omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload, |
| 342 | unsigned int load) |
| 343 | { |
| 344 | u32 l; |
| 345 | |
| 346 | l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); |
| 347 | if (autoreload) |
| 348 | l |= OMAP_TIMER_CTRL_AR; |
| 349 | else |
| 350 | l &= ~OMAP_TIMER_CTRL_AR; |
| 351 | omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l); |
| 352 | omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load); |
Richard Woodruff | 0f0d080 | 2008-07-03 12:24:30 +0300 | [diff] [blame] | 353 | |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 354 | omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0); |
| 355 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 356 | EXPORT_SYMBOL_GPL(omap_dm_timer_set_load); |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 357 | |
Richard Woodruff | 3fddd09 | 2008-07-03 12:24:30 +0300 | [diff] [blame] | 358 | /* Optimized set_load which removes costly spin wait in timer_start */ |
| 359 | void omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload, |
| 360 | unsigned int load) |
| 361 | { |
| 362 | u32 l; |
| 363 | |
| 364 | l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); |
Paul Walmsley | 64ce290 | 2008-12-10 17:36:34 -0800 | [diff] [blame] | 365 | if (autoreload) { |
Richard Woodruff | 3fddd09 | 2008-07-03 12:24:30 +0300 | [diff] [blame] | 366 | l |= OMAP_TIMER_CTRL_AR; |
Paul Walmsley | 64ce290 | 2008-12-10 17:36:34 -0800 | [diff] [blame] | 367 | omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load); |
| 368 | } else { |
Richard Woodruff | 3fddd09 | 2008-07-03 12:24:30 +0300 | [diff] [blame] | 369 | l &= ~OMAP_TIMER_CTRL_AR; |
Paul Walmsley | 64ce290 | 2008-12-10 17:36:34 -0800 | [diff] [blame] | 370 | } |
Richard Woodruff | 3fddd09 | 2008-07-03 12:24:30 +0300 | [diff] [blame] | 371 | l |= OMAP_TIMER_CTRL_ST; |
| 372 | |
Tony Lindgren | ee17f11 | 2011-09-16 15:44:20 -0700 | [diff] [blame] | 373 | __omap_dm_timer_load_start(timer, l, load, timer->posted); |
Richard Woodruff | 3fddd09 | 2008-07-03 12:24:30 +0300 | [diff] [blame] | 374 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 375 | EXPORT_SYMBOL_GPL(omap_dm_timer_set_load_start); |
Richard Woodruff | 3fddd09 | 2008-07-03 12:24:30 +0300 | [diff] [blame] | 376 | |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 377 | void omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable, |
| 378 | unsigned int match) |
| 379 | { |
| 380 | u32 l; |
| 381 | |
| 382 | l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); |
Timo Teras | 83379c8 | 2006-06-26 16:16:23 -0700 | [diff] [blame] | 383 | if (enable) |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 384 | l |= OMAP_TIMER_CTRL_CE; |
| 385 | else |
| 386 | l &= ~OMAP_TIMER_CTRL_CE; |
| 387 | omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l); |
| 388 | omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG, match); |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 389 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 390 | EXPORT_SYMBOL_GPL(omap_dm_timer_set_match); |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 391 | |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 392 | void omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on, |
| 393 | int toggle, int trigger) |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 394 | { |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 395 | u32 l; |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 396 | |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 397 | l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); |
| 398 | l &= ~(OMAP_TIMER_CTRL_GPOCFG | OMAP_TIMER_CTRL_SCPWM | |
| 399 | OMAP_TIMER_CTRL_PT | (0x03 << 10)); |
| 400 | if (def_on) |
| 401 | l |= OMAP_TIMER_CTRL_SCPWM; |
| 402 | if (toggle) |
| 403 | l |= OMAP_TIMER_CTRL_PT; |
| 404 | l |= trigger << 10; |
| 405 | omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l); |
| 406 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 407 | EXPORT_SYMBOL_GPL(omap_dm_timer_set_pwm); |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 408 | |
| 409 | void omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler) |
| 410 | { |
| 411 | u32 l; |
| 412 | |
| 413 | l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); |
| 414 | l &= ~(OMAP_TIMER_CTRL_PRE | (0x07 << 2)); |
| 415 | if (prescaler >= 0x00 && prescaler <= 0x07) { |
| 416 | l |= OMAP_TIMER_CTRL_PRE; |
| 417 | l |= prescaler << 2; |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 418 | } |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 419 | omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l); |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 420 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 421 | EXPORT_SYMBOL_GPL(omap_dm_timer_set_prescaler); |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 422 | |
| 423 | void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer, |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 424 | unsigned int value) |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 425 | { |
Tony Lindgren | ee17f11 | 2011-09-16 15:44:20 -0700 | [diff] [blame] | 426 | __omap_dm_timer_int_enable(timer, value); |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 427 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 428 | EXPORT_SYMBOL_GPL(omap_dm_timer_set_int_enable); |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 429 | |
| 430 | unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer) |
| 431 | { |
Timo Teras | fa4bb62 | 2006-09-25 12:41:35 +0300 | [diff] [blame] | 432 | unsigned int l; |
| 433 | |
Tony Lindgren | ee17f11 | 2011-09-16 15:44:20 -0700 | [diff] [blame] | 434 | l = __raw_readl(timer->irq_stat); |
Timo Teras | fa4bb62 | 2006-09-25 12:41:35 +0300 | [diff] [blame] | 435 | |
| 436 | return l; |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 437 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 438 | EXPORT_SYMBOL_GPL(omap_dm_timer_read_status); |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 439 | |
| 440 | void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value) |
| 441 | { |
Tony Lindgren | ee17f11 | 2011-09-16 15:44:20 -0700 | [diff] [blame] | 442 | __omap_dm_timer_write_status(timer, value); |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 443 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 444 | EXPORT_SYMBOL_GPL(omap_dm_timer_write_status); |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 445 | |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 446 | unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer) |
| 447 | { |
Tony Lindgren | ee17f11 | 2011-09-16 15:44:20 -0700 | [diff] [blame] | 448 | return __omap_dm_timer_read_counter(timer, timer->posted); |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 449 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 450 | EXPORT_SYMBOL_GPL(omap_dm_timer_read_counter); |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 451 | |
Timo Teras | 83379c8 | 2006-06-26 16:16:23 -0700 | [diff] [blame] | 452 | void omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value) |
| 453 | { |
Timo Teras | fa4bb62 | 2006-09-25 12:41:35 +0300 | [diff] [blame] | 454 | omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG, value); |
Timo Teras | 83379c8 | 2006-06-26 16:16:23 -0700 | [diff] [blame] | 455 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 456 | EXPORT_SYMBOL_GPL(omap_dm_timer_write_counter); |
Timo Teras | 83379c8 | 2006-06-26 16:16:23 -0700 | [diff] [blame] | 457 | |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 458 | int omap_dm_timers_active(void) |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 459 | { |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 460 | struct omap_dm_timer *timer; |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 461 | |
Tarun Kanti DebBarma | 3392cdd | 2011-09-20 17:00:20 +0530 | [diff] [blame^] | 462 | list_for_each_entry(timer, &omap_timer_list, node) { |
Timo Teras | 12583a7 | 2006-09-25 12:41:42 +0300 | [diff] [blame] | 463 | if (!timer->enabled) |
| 464 | continue; |
| 465 | |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 466 | if (omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG) & |
Timo Teras | fa4bb62 | 2006-09-25 12:41:35 +0300 | [diff] [blame] | 467 | OMAP_TIMER_CTRL_ST) { |
Timo Teras | 77900a2 | 2006-06-26 16:16:12 -0700 | [diff] [blame] | 468 | return 1; |
Timo Teras | fa4bb62 | 2006-09-25 12:41:35 +0300 | [diff] [blame] | 469 | } |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 470 | } |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 471 | return 0; |
| 472 | } |
Timo Kokkonen | 6c366e3 | 2009-03-23 18:07:46 -0700 | [diff] [blame] | 473 | EXPORT_SYMBOL_GPL(omap_dm_timers_active); |
Tony Lindgren | 92105bb | 2005-09-07 17:20:26 +0100 | [diff] [blame] | 474 | |
Tarun Kanti DebBarma | df28472 | 2011-09-20 17:00:19 +0530 | [diff] [blame] | 475 | /** |
| 476 | * omap_dm_timer_probe - probe function called for every registered device |
| 477 | * @pdev: pointer to current timer platform device |
| 478 | * |
| 479 | * Called by driver framework at the end of device registration for all |
| 480 | * timer devices. |
| 481 | */ |
| 482 | static int __devinit omap_dm_timer_probe(struct platform_device *pdev) |
| 483 | { |
| 484 | int ret; |
| 485 | unsigned long flags; |
| 486 | struct omap_dm_timer *timer; |
| 487 | struct resource *mem, *irq, *ioarea; |
| 488 | struct dmtimer_platform_data *pdata = pdev->dev.platform_data; |
| 489 | |
| 490 | if (!pdata) { |
| 491 | dev_err(&pdev->dev, "%s: no platform data.\n", __func__); |
| 492 | return -ENODEV; |
| 493 | } |
| 494 | |
| 495 | irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| 496 | if (unlikely(!irq)) { |
| 497 | dev_err(&pdev->dev, "%s: no IRQ resource.\n", __func__); |
| 498 | return -ENODEV; |
| 499 | } |
| 500 | |
| 501 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 502 | if (unlikely(!mem)) { |
| 503 | dev_err(&pdev->dev, "%s: no memory resource.\n", __func__); |
| 504 | return -ENODEV; |
| 505 | } |
| 506 | |
| 507 | ioarea = request_mem_region(mem->start, resource_size(mem), |
| 508 | pdev->name); |
| 509 | if (!ioarea) { |
| 510 | dev_err(&pdev->dev, "%s: region already claimed.\n", __func__); |
| 511 | return -EBUSY; |
| 512 | } |
| 513 | |
| 514 | timer = kzalloc(sizeof(struct omap_dm_timer), GFP_KERNEL); |
| 515 | if (!timer) { |
| 516 | dev_err(&pdev->dev, "%s: no memory for omap_dm_timer.\n", |
| 517 | __func__); |
| 518 | ret = -ENOMEM; |
| 519 | goto err_free_ioregion; |
| 520 | } |
| 521 | |
| 522 | timer->io_base = ioremap(mem->start, resource_size(mem)); |
| 523 | if (!timer->io_base) { |
| 524 | dev_err(&pdev->dev, "%s: ioremap failed.\n", __func__); |
| 525 | ret = -ENOMEM; |
| 526 | goto err_free_mem; |
| 527 | } |
| 528 | |
| 529 | timer->id = pdev->id; |
| 530 | timer->irq = irq->start; |
| 531 | timer->pdev = pdev; |
Tarun Kanti DebBarma | df28472 | 2011-09-20 17:00:19 +0530 | [diff] [blame] | 532 | |
| 533 | /* add the timer element to the list */ |
| 534 | spin_lock_irqsave(&dm_timer_lock, flags); |
| 535 | list_add_tail(&timer->node, &omap_timer_list); |
| 536 | spin_unlock_irqrestore(&dm_timer_lock, flags); |
| 537 | |
| 538 | dev_dbg(&pdev->dev, "Device Probed.\n"); |
| 539 | |
| 540 | return 0; |
| 541 | |
| 542 | err_free_mem: |
| 543 | kfree(timer); |
| 544 | |
| 545 | err_free_ioregion: |
| 546 | release_mem_region(mem->start, resource_size(mem)); |
| 547 | |
| 548 | return ret; |
| 549 | } |
| 550 | |
| 551 | /** |
| 552 | * omap_dm_timer_remove - cleanup a registered timer device |
| 553 | * @pdev: pointer to current timer platform device |
| 554 | * |
| 555 | * Called by driver framework whenever a timer device is unregistered. |
| 556 | * In addition to freeing platform resources it also deletes the timer |
| 557 | * entry from the local list. |
| 558 | */ |
| 559 | static int __devexit omap_dm_timer_remove(struct platform_device *pdev) |
| 560 | { |
| 561 | struct omap_dm_timer *timer; |
| 562 | unsigned long flags; |
| 563 | int ret = -EINVAL; |
| 564 | |
| 565 | spin_lock_irqsave(&dm_timer_lock, flags); |
| 566 | list_for_each_entry(timer, &omap_timer_list, node) |
| 567 | if (timer->pdev->id == pdev->id) { |
| 568 | list_del(&timer->node); |
| 569 | kfree(timer); |
| 570 | ret = 0; |
| 571 | break; |
| 572 | } |
| 573 | spin_unlock_irqrestore(&dm_timer_lock, flags); |
| 574 | |
| 575 | return ret; |
| 576 | } |
| 577 | |
| 578 | static struct platform_driver omap_dm_timer_driver = { |
| 579 | .probe = omap_dm_timer_probe, |
| 580 | .remove = omap_dm_timer_remove, |
| 581 | .driver = { |
| 582 | .name = "omap_timer", |
| 583 | }, |
| 584 | }; |
| 585 | |
| 586 | static int __init omap_dm_timer_driver_init(void) |
| 587 | { |
| 588 | return platform_driver_register(&omap_dm_timer_driver); |
| 589 | } |
| 590 | |
| 591 | static void __exit omap_dm_timer_driver_exit(void) |
| 592 | { |
| 593 | platform_driver_unregister(&omap_dm_timer_driver); |
| 594 | } |
| 595 | |
| 596 | early_platform_init("earlytimer", &omap_dm_timer_driver); |
| 597 | module_init(omap_dm_timer_driver_init); |
| 598 | module_exit(omap_dm_timer_driver_exit); |
| 599 | |
| 600 | MODULE_DESCRIPTION("OMAP Dual-Mode Timer Driver"); |
| 601 | MODULE_LICENSE("GPL"); |
| 602 | MODULE_ALIAS("platform:" DRIVER_NAME); |
| 603 | MODULE_AUTHOR("Texas Instruments Inc"); |