Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 1 | /* |
| 2 | * omap_device implementation |
| 3 | * |
Paul Walmsley | 887adea | 2010-07-26 16:34:33 -0600 | [diff] [blame] | 4 | * Copyright (C) 2009-2010 Nokia Corporation |
Paul Walmsley | 4788da2 | 2010-05-18 20:24:05 -0600 | [diff] [blame] | 5 | * Paul Walmsley, Kevin Hilman |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 6 | * |
| 7 | * Developed in collaboration with (alphabetical order): Benoit |
Paul Walmsley | 4788da2 | 2010-05-18 20:24:05 -0600 | [diff] [blame] | 8 | * Cousson, Thara Gopinath, Tony Lindgren, Rajendra Nayak, Vikram |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 9 | * Pandita, Sakari Poussa, Anand Sawant, Santosh Shilimkar, Richard |
| 10 | * Woodruff |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License version 2 as |
| 14 | * published by the Free Software Foundation. |
| 15 | * |
| 16 | * This code provides a consistent interface for OMAP device drivers |
| 17 | * to control power management and interconnect properties of their |
| 18 | * devices. |
| 19 | * |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 20 | * In the medium- to long-term, this code should be implemented as a |
| 21 | * proper omap_bus/omap_device in Linux, no more platform_data func |
| 22 | * pointers |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 23 | * |
| 24 | * |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 25 | */ |
| 26 | #undef DEBUG |
| 27 | |
| 28 | #include <linux/kernel.h> |
| 29 | #include <linux/platform_device.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 30 | #include <linux/slab.h> |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 31 | #include <linux/err.h> |
| 32 | #include <linux/io.h> |
Partha Basak | 4ef7aca | 2010-09-21 19:23:04 +0200 | [diff] [blame] | 33 | #include <linux/clk.h> |
Rajendra Nayak | da0653f | 2011-02-25 15:40:21 -0700 | [diff] [blame] | 34 | #include <linux/clkdev.h> |
Kevin Hilman | 345f79b | 2011-05-31 16:08:09 -0700 | [diff] [blame] | 35 | #include <linux/pm_runtime.h> |
Benoit Cousson | dc2d07e | 2011-08-10 13:32:08 +0200 | [diff] [blame] | 36 | #include <linux/of.h> |
| 37 | #include <linux/notifier.h> |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 38 | |
Tony Lindgren | dad12d1 | 2013-12-06 10:52:58 -0800 | [diff] [blame] | 39 | #include "common.h" |
Tony Lindgren | b76c8b1 | 2013-01-11 11:24:18 -0800 | [diff] [blame] | 40 | #include "soc.h" |
Tony Lindgren | 25c7d49 | 2012-10-02 17:25:48 -0700 | [diff] [blame] | 41 | #include "omap_device.h" |
Tony Lindgren | 2a296c8 | 2012-10-02 17:41:35 -0700 | [diff] [blame] | 42 | #include "omap_hwmod.h" |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 43 | |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 44 | /* Private functions */ |
| 45 | |
Benoit Cousson | bf1e077 | 2011-07-10 05:54:12 -0600 | [diff] [blame] | 46 | static void _add_clkdev(struct omap_device *od, const char *clk_alias, |
| 47 | const char *clk_name) |
| 48 | { |
| 49 | struct clk *r; |
| 50 | struct clk_lookup *l; |
| 51 | |
| 52 | if (!clk_alias || !clk_name) |
| 53 | return; |
| 54 | |
Kevin Hilman | d66b3fe | 2011-07-21 13:58:51 -0700 | [diff] [blame] | 55 | dev_dbg(&od->pdev->dev, "Creating %s -> %s\n", clk_alias, clk_name); |
Benoit Cousson | bf1e077 | 2011-07-10 05:54:12 -0600 | [diff] [blame] | 56 | |
Kevin Hilman | d66b3fe | 2011-07-21 13:58:51 -0700 | [diff] [blame] | 57 | r = clk_get_sys(dev_name(&od->pdev->dev), clk_alias); |
Benoit Cousson | bf1e077 | 2011-07-10 05:54:12 -0600 | [diff] [blame] | 58 | if (!IS_ERR(r)) { |
Markus Pargmann | 9a02ae4 | 2014-08-25 16:15:34 -0700 | [diff] [blame] | 59 | dev_dbg(&od->pdev->dev, |
Kevin Hilman | 49882c9 | 2011-07-21 09:58:36 -0700 | [diff] [blame] | 60 | "alias %s already exists\n", clk_alias); |
Benoit Cousson | bf1e077 | 2011-07-10 05:54:12 -0600 | [diff] [blame] | 61 | clk_put(r); |
| 62 | return; |
| 63 | } |
| 64 | |
Rajendra Nayak | 6ea74cb | 2012-09-22 02:24:16 -0600 | [diff] [blame] | 65 | r = clk_get(NULL, clk_name); |
Benoit Cousson | bf1e077 | 2011-07-10 05:54:12 -0600 | [diff] [blame] | 66 | if (IS_ERR(r)) { |
Kevin Hilman | d66b3fe | 2011-07-21 13:58:51 -0700 | [diff] [blame] | 67 | dev_err(&od->pdev->dev, |
Rajendra Nayak | 6ea74cb | 2012-09-22 02:24:16 -0600 | [diff] [blame] | 68 | "clk_get for %s failed\n", clk_name); |
Benoit Cousson | bf1e077 | 2011-07-10 05:54:12 -0600 | [diff] [blame] | 69 | return; |
| 70 | } |
| 71 | |
Kevin Hilman | d66b3fe | 2011-07-21 13:58:51 -0700 | [diff] [blame] | 72 | l = clkdev_alloc(r, clk_alias, dev_name(&od->pdev->dev)); |
Benoit Cousson | bf1e077 | 2011-07-10 05:54:12 -0600 | [diff] [blame] | 73 | if (!l) { |
Kevin Hilman | d66b3fe | 2011-07-21 13:58:51 -0700 | [diff] [blame] | 74 | dev_err(&od->pdev->dev, |
Kevin Hilman | 49882c9 | 2011-07-21 09:58:36 -0700 | [diff] [blame] | 75 | "clkdev_alloc for %s failed\n", clk_alias); |
Benoit Cousson | bf1e077 | 2011-07-10 05:54:12 -0600 | [diff] [blame] | 76 | return; |
| 77 | } |
| 78 | |
| 79 | clkdev_add(l); |
| 80 | } |
| 81 | |
Partha Basak | 4ef7aca | 2010-09-21 19:23:04 +0200 | [diff] [blame] | 82 | /** |
Benoit Cousson | bf1e077 | 2011-07-10 05:54:12 -0600 | [diff] [blame] | 83 | * _add_hwmod_clocks_clkdev - Add clkdev entry for hwmod optional clocks |
| 84 | * and main clock |
Partha Basak | 4ef7aca | 2010-09-21 19:23:04 +0200 | [diff] [blame] | 85 | * @od: struct omap_device *od |
Benoit Cousson | bf1e077 | 2011-07-10 05:54:12 -0600 | [diff] [blame] | 86 | * @oh: struct omap_hwmod *oh |
Partha Basak | 4ef7aca | 2010-09-21 19:23:04 +0200 | [diff] [blame] | 87 | * |
Benoit Cousson | bf1e077 | 2011-07-10 05:54:12 -0600 | [diff] [blame] | 88 | * For the main clock and every optional clock present per hwmod per |
| 89 | * omap_device, this function adds an entry in the clkdev table of the |
| 90 | * form <dev-id=dev_name, con-id=role> if it does not exist already. |
Partha Basak | 4ef7aca | 2010-09-21 19:23:04 +0200 | [diff] [blame] | 91 | * |
| 92 | * The function is called from inside omap_device_build_ss(), after |
| 93 | * omap_device_register. |
| 94 | * |
| 95 | * This allows drivers to get a pointer to its optional clocks based on its role |
| 96 | * by calling clk_get(<dev*>, <role>). |
Benoit Cousson | bf1e077 | 2011-07-10 05:54:12 -0600 | [diff] [blame] | 97 | * In the case of the main clock, a "fck" alias is used. |
Partha Basak | 4ef7aca | 2010-09-21 19:23:04 +0200 | [diff] [blame] | 98 | * |
| 99 | * No return value. |
| 100 | */ |
Benoit Cousson | bf1e077 | 2011-07-10 05:54:12 -0600 | [diff] [blame] | 101 | static void _add_hwmod_clocks_clkdev(struct omap_device *od, |
| 102 | struct omap_hwmod *oh) |
Partha Basak | 4ef7aca | 2010-09-21 19:23:04 +0200 | [diff] [blame] | 103 | { |
| 104 | int i; |
| 105 | |
Benoit Cousson | bf1e077 | 2011-07-10 05:54:12 -0600 | [diff] [blame] | 106 | _add_clkdev(od, "fck", oh->main_clk); |
Partha Basak | 4ef7aca | 2010-09-21 19:23:04 +0200 | [diff] [blame] | 107 | |
Benoit Cousson | bf1e077 | 2011-07-10 05:54:12 -0600 | [diff] [blame] | 108 | for (i = 0; i < oh->opt_clks_cnt; i++) |
| 109 | _add_clkdev(od, oh->opt_clks[i].role, oh->opt_clks[i].clk); |
Partha Basak | 4ef7aca | 2010-09-21 19:23:04 +0200 | [diff] [blame] | 110 | } |
| 111 | |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 112 | |
Benoit Cousson | dc2d07e | 2011-08-10 13:32:08 +0200 | [diff] [blame] | 113 | /** |
| 114 | * omap_device_build_from_dt - build an omap_device with multiple hwmods |
| 115 | * @pdev_name: name of the platform_device driver to use |
| 116 | * @pdev_id: this platform_device's connection ID |
| 117 | * @oh: ptr to the single omap_hwmod that backs this omap_device |
| 118 | * @pdata: platform_data ptr to associate with the platform_device |
| 119 | * @pdata_len: amount of memory pointed to by @pdata |
Benoit Cousson | dc2d07e | 2011-08-10 13:32:08 +0200 | [diff] [blame] | 120 | * |
| 121 | * Function for building an omap_device already registered from device-tree |
| 122 | * |
| 123 | * Returns 0 or PTR_ERR() on error. |
| 124 | */ |
| 125 | static int omap_device_build_from_dt(struct platform_device *pdev) |
| 126 | { |
| 127 | struct omap_hwmod **hwmods; |
| 128 | struct omap_device *od; |
| 129 | struct omap_hwmod *oh; |
| 130 | struct device_node *node = pdev->dev.of_node; |
| 131 | const char *oh_name; |
| 132 | int oh_cnt, i, ret = 0; |
Rajendra Nayak | 7268032 | 2013-07-28 23:01:51 -0600 | [diff] [blame] | 133 | bool device_active = false; |
Benoit Cousson | dc2d07e | 2011-08-10 13:32:08 +0200 | [diff] [blame] | 134 | |
| 135 | oh_cnt = of_property_count_strings(node, "ti,hwmods"); |
Russell King | c48cd65 | 2013-03-13 20:44:21 +0000 | [diff] [blame] | 136 | if (oh_cnt <= 0) { |
Benoit Cousson | 5dc06b7 | 2012-01-20 18:14:00 +0100 | [diff] [blame] | 137 | dev_dbg(&pdev->dev, "No 'hwmods' to build omap_device\n"); |
Benoit Cousson | dc2d07e | 2011-08-10 13:32:08 +0200 | [diff] [blame] | 138 | return -ENODEV; |
| 139 | } |
| 140 | |
| 141 | hwmods = kzalloc(sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL); |
| 142 | if (!hwmods) { |
| 143 | ret = -ENOMEM; |
| 144 | goto odbfd_exit; |
| 145 | } |
| 146 | |
| 147 | for (i = 0; i < oh_cnt; i++) { |
| 148 | of_property_read_string_index(node, "ti,hwmods", i, &oh_name); |
| 149 | oh = omap_hwmod_lookup(oh_name); |
| 150 | if (!oh) { |
| 151 | dev_err(&pdev->dev, "Cannot lookup hwmod '%s'\n", |
| 152 | oh_name); |
| 153 | ret = -EINVAL; |
| 154 | goto odbfd_exit1; |
| 155 | } |
| 156 | hwmods[i] = oh; |
Rajendra Nayak | 7268032 | 2013-07-28 23:01:51 -0600 | [diff] [blame] | 157 | if (oh->flags & HWMOD_INIT_NO_IDLE) |
| 158 | device_active = true; |
Benoit Cousson | dc2d07e | 2011-08-10 13:32:08 +0200 | [diff] [blame] | 159 | } |
| 160 | |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 161 | od = omap_device_alloc(pdev, hwmods, oh_cnt); |
Wei Yongjun | 4cf9cf8 | 2013-09-18 12:01:58 -0700 | [diff] [blame] | 162 | if (IS_ERR(od)) { |
Benoit Cousson | dc2d07e | 2011-08-10 13:32:08 +0200 | [diff] [blame] | 163 | dev_err(&pdev->dev, "Cannot allocate omap_device for :%s\n", |
| 164 | oh_name); |
| 165 | ret = PTR_ERR(od); |
| 166 | goto odbfd_exit1; |
| 167 | } |
| 168 | |
Peter Ujfalusi | 3956a1a | 2012-08-23 16:54:09 +0300 | [diff] [blame] | 169 | /* Fix up missing resource names */ |
| 170 | for (i = 0; i < pdev->num_resources; i++) { |
| 171 | struct resource *r = &pdev->resource[i]; |
| 172 | |
| 173 | if (r->name == NULL) |
| 174 | r->name = dev_name(&pdev->dev); |
| 175 | } |
| 176 | |
Benoit Cousson | dc2d07e | 2011-08-10 13:32:08 +0200 | [diff] [blame] | 177 | pdev->dev.pm_domain = &omap_device_pm_domain; |
| 178 | |
Rajendra Nayak | 7268032 | 2013-07-28 23:01:51 -0600 | [diff] [blame] | 179 | if (device_active) { |
| 180 | omap_device_enable(pdev); |
| 181 | pm_runtime_set_active(&pdev->dev); |
| 182 | } |
| 183 | |
Benoit Cousson | dc2d07e | 2011-08-10 13:32:08 +0200 | [diff] [blame] | 184 | odbfd_exit1: |
| 185 | kfree(hwmods); |
| 186 | odbfd_exit: |
Nishanth Menon | f5c33b0 | 2013-12-03 19:39:13 -0600 | [diff] [blame] | 187 | /* if data/we are at fault.. load up a fail handler */ |
| 188 | if (ret) |
| 189 | pdev->dev.pm_domain = &omap_device_fail_pm_domain; |
| 190 | |
Benoit Cousson | dc2d07e | 2011-08-10 13:32:08 +0200 | [diff] [blame] | 191 | return ret; |
| 192 | } |
| 193 | |
| 194 | static int _omap_device_notifier_call(struct notifier_block *nb, |
| 195 | unsigned long event, void *dev) |
| 196 | { |
| 197 | struct platform_device *pdev = to_platform_device(dev); |
Kevin Hilman | e753345 | 2012-07-10 11:13:16 -0700 | [diff] [blame] | 198 | struct omap_device *od; |
Benoit Cousson | dc2d07e | 2011-08-10 13:32:08 +0200 | [diff] [blame] | 199 | |
| 200 | switch (event) { |
Benoit Cousson | dc2d07e | 2011-08-10 13:32:08 +0200 | [diff] [blame] | 201 | case BUS_NOTIFY_DEL_DEVICE: |
| 202 | if (pdev->archdata.od) |
| 203 | omap_device_delete(pdev->archdata.od); |
| 204 | break; |
Kevin Hilman | e753345 | 2012-07-10 11:13:16 -0700 | [diff] [blame] | 205 | case BUS_NOTIFY_ADD_DEVICE: |
| 206 | if (pdev->dev.of_node) |
| 207 | omap_device_build_from_dt(pdev); |
Tony Lindgren | dad12d1 | 2013-12-06 10:52:58 -0800 | [diff] [blame] | 208 | omap_auxdata_legacy_init(dev); |
Kevin Hilman | e753345 | 2012-07-10 11:13:16 -0700 | [diff] [blame] | 209 | /* fall through */ |
| 210 | default: |
| 211 | od = to_omap_device(pdev); |
| 212 | if (od) |
| 213 | od->_driver_status = event; |
Benoit Cousson | dc2d07e | 2011-08-10 13:32:08 +0200 | [diff] [blame] | 214 | } |
| 215 | |
| 216 | return NOTIFY_DONE; |
| 217 | } |
| 218 | |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 219 | /** |
| 220 | * _omap_device_enable_hwmods - call omap_hwmod_enable() on all hwmods |
| 221 | * @od: struct omap_device *od |
| 222 | * |
| 223 | * Enable all underlying hwmods. Returns 0. |
| 224 | */ |
| 225 | static int _omap_device_enable_hwmods(struct omap_device *od) |
| 226 | { |
Pali Rohár | 6da2335 | 2015-02-26 14:49:51 +0100 | [diff] [blame^] | 227 | int ret = 0; |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 228 | int i; |
| 229 | |
| 230 | for (i = 0; i < od->hwmods_cnt; i++) |
Pali Rohár | 6da2335 | 2015-02-26 14:49:51 +0100 | [diff] [blame^] | 231 | ret |= omap_hwmod_enable(od->hwmods[i]); |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 232 | |
Pali Rohár | 6da2335 | 2015-02-26 14:49:51 +0100 | [diff] [blame^] | 233 | return ret; |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | /** |
| 237 | * _omap_device_idle_hwmods - call omap_hwmod_idle() on all hwmods |
| 238 | * @od: struct omap_device *od |
| 239 | * |
| 240 | * Idle all underlying hwmods. Returns 0. |
| 241 | */ |
| 242 | static int _omap_device_idle_hwmods(struct omap_device *od) |
| 243 | { |
Pali Rohár | 6da2335 | 2015-02-26 14:49:51 +0100 | [diff] [blame^] | 244 | int ret = 0; |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 245 | int i; |
| 246 | |
| 247 | for (i = 0; i < od->hwmods_cnt; i++) |
Pali Rohár | 6da2335 | 2015-02-26 14:49:51 +0100 | [diff] [blame^] | 248 | ret |= omap_hwmod_idle(od->hwmods[i]); |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 249 | |
Pali Rohár | 6da2335 | 2015-02-26 14:49:51 +0100 | [diff] [blame^] | 250 | return ret; |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 251 | } |
Benoit Cousson | dc2d07e | 2011-08-10 13:32:08 +0200 | [diff] [blame] | 252 | |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 253 | /* Public functions for use by core code */ |
| 254 | |
| 255 | /** |
Kevin Hilman | c80705a | 2010-12-21 21:31:55 -0700 | [diff] [blame] | 256 | * omap_device_get_context_loss_count - get lost context count |
| 257 | * @od: struct omap_device * |
| 258 | * |
| 259 | * Using the primary hwmod, query the context loss count for this |
| 260 | * device. |
| 261 | * |
| 262 | * Callers should consider context for this device lost any time this |
| 263 | * function returns a value different than the value the caller got |
| 264 | * the last time it called this function. |
| 265 | * |
| 266 | * If any hwmods exist for the omap_device assoiated with @pdev, |
| 267 | * return the context loss counter for that hwmod, otherwise return |
| 268 | * zero. |
| 269 | */ |
Tomi Valkeinen | fc01387 | 2011-06-09 16:56:23 +0300 | [diff] [blame] | 270 | int omap_device_get_context_loss_count(struct platform_device *pdev) |
Kevin Hilman | c80705a | 2010-12-21 21:31:55 -0700 | [diff] [blame] | 271 | { |
| 272 | struct omap_device *od; |
| 273 | u32 ret = 0; |
| 274 | |
Kevin Hilman | 8f0d69d | 2011-07-09 19:15:20 -0600 | [diff] [blame] | 275 | od = to_omap_device(pdev); |
Kevin Hilman | c80705a | 2010-12-21 21:31:55 -0700 | [diff] [blame] | 276 | |
| 277 | if (od->hwmods_cnt) |
| 278 | ret = omap_hwmod_get_context_loss_count(od->hwmods[0]); |
| 279 | |
| 280 | return ret; |
| 281 | } |
| 282 | |
| 283 | /** |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 284 | * omap_device_count_resources - count number of struct resource entries needed |
| 285 | * @od: struct omap_device * |
Peter Ujfalusi | dad4191 | 2012-11-21 16:15:17 -0700 | [diff] [blame] | 286 | * @flags: Type of resources to include when counting (IRQ/DMA/MEM) |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 287 | * |
| 288 | * Count the number of struct resource entries needed for this |
| 289 | * omap_device @od. Used by omap_device_build_ss() to determine how |
| 290 | * much memory to allocate before calling |
| 291 | * omap_device_fill_resources(). Returns the count. |
| 292 | */ |
Peter Ujfalusi | dad4191 | 2012-11-21 16:15:17 -0700 | [diff] [blame] | 293 | static int omap_device_count_resources(struct omap_device *od, |
| 294 | unsigned long flags) |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 295 | { |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 296 | int c = 0; |
| 297 | int i; |
| 298 | |
Kishon Vijay Abraham I | f39f489 | 2010-09-24 10:23:18 -0600 | [diff] [blame] | 299 | for (i = 0; i < od->hwmods_cnt; i++) |
Peter Ujfalusi | dad4191 | 2012-11-21 16:15:17 -0700 | [diff] [blame] | 300 | c += omap_hwmod_count_resources(od->hwmods[i], flags); |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 301 | |
Paul Walmsley | 7852ec0 | 2012-07-26 00:54:26 -0600 | [diff] [blame] | 302 | pr_debug("omap_device: %s: counted %d total resources across %d hwmods\n", |
| 303 | od->pdev->name, c, od->hwmods_cnt); |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 304 | |
| 305 | return c; |
| 306 | } |
| 307 | |
| 308 | /** |
| 309 | * omap_device_fill_resources - fill in array of struct resource |
| 310 | * @od: struct omap_device * |
| 311 | * @res: pointer to an array of struct resource to be filled in |
| 312 | * |
| 313 | * Populate one or more empty struct resource pointed to by @res with |
| 314 | * the resource data for this omap_device @od. Used by |
| 315 | * omap_device_build_ss() after calling omap_device_count_resources(). |
| 316 | * Ideally this function would not be needed at all. If omap_device |
| 317 | * replaces platform_device, then we can specify our own |
| 318 | * get_resource()/ get_irq()/etc functions that use the underlying |
| 319 | * omap_hwmod information. Or if platform_device is extended to use |
| 320 | * subarchitecture-specific function pointers, the various |
| 321 | * platform_device functions can simply call omap_device internal |
| 322 | * functions to get device resources. Hacking around the existing |
| 323 | * platform_device code wastes memory. Returns 0. |
| 324 | */ |
Kevin Hilman | a2a28ad | 2011-07-21 14:14:35 -0700 | [diff] [blame] | 325 | static int omap_device_fill_resources(struct omap_device *od, |
| 326 | struct resource *res) |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 327 | { |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 328 | int i, r; |
| 329 | |
Kishon Vijay Abraham I | f39f489 | 2010-09-24 10:23:18 -0600 | [diff] [blame] | 330 | for (i = 0; i < od->hwmods_cnt; i++) { |
| 331 | r = omap_hwmod_fill_resources(od->hwmods[i], res); |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 332 | res += r; |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 333 | } |
| 334 | |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | /** |
Vaibhav Hiremath | b82b04e | 2012-08-29 15:18:11 +0530 | [diff] [blame] | 339 | * _od_fill_dma_resources - fill in array of struct resource with dma resources |
| 340 | * @od: struct omap_device * |
| 341 | * @res: pointer to an array of struct resource to be filled in |
| 342 | * |
| 343 | * Populate one or more empty struct resource pointed to by @res with |
| 344 | * the dma resource data for this omap_device @od. Used by |
| 345 | * omap_device_alloc() after calling omap_device_count_resources(). |
| 346 | * |
| 347 | * Ideally this function would not be needed at all. If we have |
| 348 | * mechanism to get dma resources from DT. |
| 349 | * |
| 350 | * Returns 0. |
| 351 | */ |
| 352 | static int _od_fill_dma_resources(struct omap_device *od, |
| 353 | struct resource *res) |
| 354 | { |
| 355 | int i, r; |
| 356 | |
| 357 | for (i = 0; i < od->hwmods_cnt; i++) { |
| 358 | r = omap_hwmod_fill_dma_resources(od->hwmods[i], res); |
| 359 | res += r; |
| 360 | } |
| 361 | |
| 362 | return 0; |
| 363 | } |
| 364 | |
| 365 | /** |
Benoit Cousson | a4f6cdb | 2011-08-09 16:47:01 +0200 | [diff] [blame] | 366 | * omap_device_alloc - allocate an omap_device |
| 367 | * @pdev: platform_device that will be included in this omap_device |
| 368 | * @oh: ptr to the single omap_hwmod that backs this omap_device |
| 369 | * @pdata: platform_data ptr to associate with the platform_device |
| 370 | * @pdata_len: amount of memory pointed to by @pdata |
Benoit Cousson | a4f6cdb | 2011-08-09 16:47:01 +0200 | [diff] [blame] | 371 | * |
| 372 | * Convenience function for allocating an omap_device structure and filling |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 373 | * hwmods, and resources. |
Benoit Cousson | a4f6cdb | 2011-08-09 16:47:01 +0200 | [diff] [blame] | 374 | * |
| 375 | * Returns an struct omap_device pointer or ERR_PTR() on error; |
| 376 | */ |
Ohad Ben-Cohen | 993e4fb | 2012-02-20 09:43:29 -0800 | [diff] [blame] | 377 | struct omap_device *omap_device_alloc(struct platform_device *pdev, |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 378 | struct omap_hwmod **ohs, int oh_cnt) |
Benoit Cousson | a4f6cdb | 2011-08-09 16:47:01 +0200 | [diff] [blame] | 379 | { |
| 380 | int ret = -ENOMEM; |
| 381 | struct omap_device *od; |
| 382 | struct resource *res = NULL; |
| 383 | int i, res_count; |
| 384 | struct omap_hwmod **hwmods; |
| 385 | |
| 386 | od = kzalloc(sizeof(struct omap_device), GFP_KERNEL); |
| 387 | if (!od) { |
| 388 | ret = -ENOMEM; |
| 389 | goto oda_exit1; |
| 390 | } |
| 391 | od->hwmods_cnt = oh_cnt; |
| 392 | |
| 393 | hwmods = kmemdup(ohs, sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL); |
| 394 | if (!hwmods) |
| 395 | goto oda_exit2; |
| 396 | |
| 397 | od->hwmods = hwmods; |
| 398 | od->pdev = pdev; |
| 399 | |
Vaibhav Hiremath | b82b04e | 2012-08-29 15:18:11 +0530 | [diff] [blame] | 400 | /* |
Peter Ujfalusi | c567b05 | 2012-11-21 16:15:18 -0700 | [diff] [blame] | 401 | * Non-DT Boot: |
| 402 | * Here, pdev->num_resources = 0, and we should get all the |
| 403 | * resources from hwmod. |
| 404 | * |
Vaibhav Hiremath | b82b04e | 2012-08-29 15:18:11 +0530 | [diff] [blame] | 405 | * DT Boot: |
| 406 | * OF framework will construct the resource structure (currently |
| 407 | * does for MEM & IRQ resource) and we should respect/use these |
| 408 | * resources, killing hwmod dependency. |
| 409 | * If pdev->num_resources > 0, we assume that MEM & IRQ resources |
| 410 | * have been allocated by OF layer already (through DTB). |
Peter Ujfalusi | c567b05 | 2012-11-21 16:15:18 -0700 | [diff] [blame] | 411 | * As preparation for the future we examine the OF provided resources |
| 412 | * to see if we have DMA resources provided already. In this case |
| 413 | * there is no need to update the resources for the device, we use the |
| 414 | * OF provided ones. |
Vaibhav Hiremath | b82b04e | 2012-08-29 15:18:11 +0530 | [diff] [blame] | 415 | * |
| 416 | * TODO: Once DMA resource is available from OF layer, we should |
| 417 | * kill filling any resources from hwmod. |
| 418 | */ |
Peter Ujfalusi | c567b05 | 2012-11-21 16:15:18 -0700 | [diff] [blame] | 419 | if (!pdev->num_resources) { |
| 420 | /* Count all resources for the device */ |
| 421 | res_count = omap_device_count_resources(od, IORESOURCE_IRQ | |
| 422 | IORESOURCE_DMA | |
| 423 | IORESOURCE_MEM); |
| 424 | } else { |
| 425 | /* Take a look if we already have DMA resource via DT */ |
| 426 | for (i = 0; i < pdev->num_resources; i++) { |
| 427 | struct resource *r = &pdev->resource[i]; |
Benoit Cousson | a4f6cdb | 2011-08-09 16:47:01 +0200 | [diff] [blame] | 428 | |
Peter Ujfalusi | c567b05 | 2012-11-21 16:15:18 -0700 | [diff] [blame] | 429 | /* We have it, no need to touch the resources */ |
| 430 | if (r->flags == IORESOURCE_DMA) |
| 431 | goto have_everything; |
Vaibhav Hiremath | b82b04e | 2012-08-29 15:18:11 +0530 | [diff] [blame] | 432 | } |
Peter Ujfalusi | c567b05 | 2012-11-21 16:15:18 -0700 | [diff] [blame] | 433 | /* Count only DMA resources for the device */ |
| 434 | res_count = omap_device_count_resources(od, IORESOURCE_DMA); |
| 435 | /* The device has no DMA resource, no need for update */ |
| 436 | if (!res_count) |
| 437 | goto have_everything; |
Benoit Cousson | a4f6cdb | 2011-08-09 16:47:01 +0200 | [diff] [blame] | 438 | |
Peter Ujfalusi | c567b05 | 2012-11-21 16:15:18 -0700 | [diff] [blame] | 439 | res_count += pdev->num_resources; |
Benoit Cousson | a4f6cdb | 2011-08-09 16:47:01 +0200 | [diff] [blame] | 440 | } |
| 441 | |
Peter Ujfalusi | c567b05 | 2012-11-21 16:15:18 -0700 | [diff] [blame] | 442 | /* Allocate resources memory to account for new resources */ |
| 443 | res = kzalloc(sizeof(struct resource) * res_count, GFP_KERNEL); |
| 444 | if (!res) |
| 445 | goto oda_exit3; |
| 446 | |
| 447 | if (!pdev->num_resources) { |
| 448 | dev_dbg(&pdev->dev, "%s: using %d resources from hwmod\n", |
| 449 | __func__, res_count); |
| 450 | omap_device_fill_resources(od, res); |
| 451 | } else { |
| 452 | dev_dbg(&pdev->dev, |
| 453 | "%s: appending %d DMA resources from hwmod\n", |
| 454 | __func__, res_count - pdev->num_resources); |
| 455 | memcpy(res, pdev->resource, |
| 456 | sizeof(struct resource) * pdev->num_resources); |
| 457 | _od_fill_dma_resources(od, &res[pdev->num_resources]); |
| 458 | } |
| 459 | |
| 460 | ret = platform_device_add_resources(pdev, res, res_count); |
| 461 | kfree(res); |
| 462 | |
| 463 | if (ret) |
| 464 | goto oda_exit3; |
| 465 | |
| 466 | have_everything: |
Benoit Cousson | a4f6cdb | 2011-08-09 16:47:01 +0200 | [diff] [blame] | 467 | pdev->archdata.od = od; |
| 468 | |
| 469 | for (i = 0; i < oh_cnt; i++) { |
| 470 | hwmods[i]->od = od; |
| 471 | _add_hwmod_clocks_clkdev(od, hwmods[i]); |
| 472 | } |
| 473 | |
| 474 | return od; |
| 475 | |
| 476 | oda_exit3: |
| 477 | kfree(hwmods); |
| 478 | oda_exit2: |
| 479 | kfree(od); |
| 480 | oda_exit1: |
| 481 | dev_err(&pdev->dev, "omap_device: build failed (%d)\n", ret); |
| 482 | |
| 483 | return ERR_PTR(ret); |
| 484 | } |
| 485 | |
Ohad Ben-Cohen | 993e4fb | 2012-02-20 09:43:29 -0800 | [diff] [blame] | 486 | void omap_device_delete(struct omap_device *od) |
Benoit Cousson | a4f6cdb | 2011-08-09 16:47:01 +0200 | [diff] [blame] | 487 | { |
Benoit Cousson | dc2d07e | 2011-08-10 13:32:08 +0200 | [diff] [blame] | 488 | if (!od) |
| 489 | return; |
| 490 | |
Benoit Cousson | a4f6cdb | 2011-08-09 16:47:01 +0200 | [diff] [blame] | 491 | od->pdev->archdata.od = NULL; |
Benoit Cousson | a4f6cdb | 2011-08-09 16:47:01 +0200 | [diff] [blame] | 492 | kfree(od->hwmods); |
| 493 | kfree(od); |
| 494 | } |
| 495 | |
| 496 | /** |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 497 | * omap_device_build - build and register an omap_device with one omap_hwmod |
| 498 | * @pdev_name: name of the platform_device driver to use |
| 499 | * @pdev_id: this platform_device's connection ID |
| 500 | * @oh: ptr to the single omap_hwmod that backs this omap_device |
| 501 | * @pdata: platform_data ptr to associate with the platform_device |
| 502 | * @pdata_len: amount of memory pointed to by @pdata |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 503 | * |
| 504 | * Convenience function for building and registering a single |
| 505 | * omap_device record, which in turn builds and registers a |
| 506 | * platform_device record. See omap_device_build_ss() for more |
| 507 | * information. Returns ERR_PTR(-EINVAL) if @oh is NULL; otherwise, |
| 508 | * passes along the return value of omap_device_build_ss(). |
| 509 | */ |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 510 | struct platform_device __init *omap_device_build(const char *pdev_name, |
| 511 | int pdev_id, |
| 512 | struct omap_hwmod *oh, |
| 513 | void *pdata, int pdata_len) |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 514 | { |
| 515 | struct omap_hwmod *ohs[] = { oh }; |
| 516 | |
| 517 | if (!oh) |
| 518 | return ERR_PTR(-EINVAL); |
| 519 | |
| 520 | return omap_device_build_ss(pdev_name, pdev_id, ohs, 1, pdata, |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 521 | pdata_len); |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 522 | } |
| 523 | |
| 524 | /** |
| 525 | * omap_device_build_ss - build and register an omap_device with multiple hwmods |
| 526 | * @pdev_name: name of the platform_device driver to use |
| 527 | * @pdev_id: this platform_device's connection ID |
| 528 | * @oh: ptr to the single omap_hwmod that backs this omap_device |
| 529 | * @pdata: platform_data ptr to associate with the platform_device |
| 530 | * @pdata_len: amount of memory pointed to by @pdata |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 531 | * |
| 532 | * Convenience function for building and registering an omap_device |
| 533 | * subsystem record. Subsystem records consist of multiple |
| 534 | * omap_hwmods. This function in turn builds and registers a |
| 535 | * platform_device record. Returns an ERR_PTR() on error, or passes |
| 536 | * along the return value of omap_device_register(). |
| 537 | */ |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 538 | struct platform_device __init *omap_device_build_ss(const char *pdev_name, |
| 539 | int pdev_id, |
| 540 | struct omap_hwmod **ohs, |
| 541 | int oh_cnt, void *pdata, |
| 542 | int pdata_len) |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 543 | { |
| 544 | int ret = -ENOMEM; |
Kevin Hilman | d66b3fe | 2011-07-21 13:58:51 -0700 | [diff] [blame] | 545 | struct platform_device *pdev; |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 546 | struct omap_device *od; |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 547 | |
| 548 | if (!ohs || oh_cnt == 0 || !pdev_name) |
| 549 | return ERR_PTR(-EINVAL); |
| 550 | |
| 551 | if (!pdata && pdata_len > 0) |
| 552 | return ERR_PTR(-EINVAL); |
| 553 | |
Kevin Hilman | d66b3fe | 2011-07-21 13:58:51 -0700 | [diff] [blame] | 554 | pdev = platform_device_alloc(pdev_name, pdev_id); |
| 555 | if (!pdev) { |
| 556 | ret = -ENOMEM; |
| 557 | goto odbs_exit; |
| 558 | } |
| 559 | |
Benoit Cousson | a4f6cdb | 2011-08-09 16:47:01 +0200 | [diff] [blame] | 560 | /* Set the dev_name early to allow dev_xxx in omap_device_alloc */ |
| 561 | if (pdev->id != -1) |
| 562 | dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); |
| 563 | else |
| 564 | dev_set_name(&pdev->dev, "%s", pdev->name); |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 565 | |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 566 | od = omap_device_alloc(pdev, ohs, oh_cnt); |
Wei Yongjun | a87e662 | 2012-09-21 14:32:04 +0800 | [diff] [blame] | 567 | if (IS_ERR(od)) |
Kevin Hilman | d66b3fe | 2011-07-21 13:58:51 -0700 | [diff] [blame] | 568 | goto odbs_exit1; |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 569 | |
Kevin Hilman | d66b3fe | 2011-07-21 13:58:51 -0700 | [diff] [blame] | 570 | ret = platform_device_add_data(pdev, pdata, pdata_len); |
Artem Bityutskiy | 49b368a | 2010-07-12 13:38:07 +0000 | [diff] [blame] | 571 | if (ret) |
Benoit Cousson | a4f6cdb | 2011-08-09 16:47:01 +0200 | [diff] [blame] | 572 | goto odbs_exit2; |
Kevin Hilman | d66b3fe | 2011-07-21 13:58:51 -0700 | [diff] [blame] | 573 | |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 574 | ret = omap_device_register(pdev); |
Kevin Hilman | d66b3fe | 2011-07-21 13:58:51 -0700 | [diff] [blame] | 575 | if (ret) |
Benoit Cousson | a4f6cdb | 2011-08-09 16:47:01 +0200 | [diff] [blame] | 576 | goto odbs_exit2; |
Kevin Hilman | 0656358 | 2010-07-26 16:34:30 -0600 | [diff] [blame] | 577 | |
Kevin Hilman | d66b3fe | 2011-07-21 13:58:51 -0700 | [diff] [blame] | 578 | return pdev; |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 579 | |
Kevin Hilman | d66b3fe | 2011-07-21 13:58:51 -0700 | [diff] [blame] | 580 | odbs_exit2: |
Benoit Cousson | a4f6cdb | 2011-08-09 16:47:01 +0200 | [diff] [blame] | 581 | omap_device_delete(od); |
Kevin Hilman | d66b3fe | 2011-07-21 13:58:51 -0700 | [diff] [blame] | 582 | odbs_exit1: |
| 583 | platform_device_put(pdev); |
| 584 | odbs_exit: |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 585 | |
| 586 | pr_err("omap_device: %s: build failed (%d)\n", pdev_name, ret); |
| 587 | |
| 588 | return ERR_PTR(ret); |
| 589 | } |
| 590 | |
Rafael J. Wysocki | bf7c544 | 2014-12-13 00:42:49 +0100 | [diff] [blame] | 591 | #ifdef CONFIG_PM |
Kevin Hilman | 638080c | 2011-04-29 00:36:42 +0200 | [diff] [blame] | 592 | static int _od_runtime_suspend(struct device *dev) |
| 593 | { |
| 594 | struct platform_device *pdev = to_platform_device(dev); |
Kevin Hilman | 345f79b | 2011-05-31 16:08:09 -0700 | [diff] [blame] | 595 | int ret; |
Kevin Hilman | 638080c | 2011-04-29 00:36:42 +0200 | [diff] [blame] | 596 | |
Kevin Hilman | 345f79b | 2011-05-31 16:08:09 -0700 | [diff] [blame] | 597 | ret = pm_generic_runtime_suspend(dev); |
Pali Rohár | 6da2335 | 2015-02-26 14:49:51 +0100 | [diff] [blame^] | 598 | if (ret) |
| 599 | return ret; |
Kevin Hilman | 345f79b | 2011-05-31 16:08:09 -0700 | [diff] [blame] | 600 | |
Pali Rohár | 6da2335 | 2015-02-26 14:49:51 +0100 | [diff] [blame^] | 601 | return omap_device_idle(pdev); |
Kevin Hilman | 345f79b | 2011-05-31 16:08:09 -0700 | [diff] [blame] | 602 | } |
| 603 | |
Kevin Hilman | 638080c | 2011-04-29 00:36:42 +0200 | [diff] [blame] | 604 | static int _od_runtime_resume(struct device *dev) |
| 605 | { |
| 606 | struct platform_device *pdev = to_platform_device(dev); |
Pali Rohár | 6da2335 | 2015-02-26 14:49:51 +0100 | [diff] [blame^] | 607 | int ret; |
Kevin Hilman | 638080c | 2011-04-29 00:36:42 +0200 | [diff] [blame] | 608 | |
Pali Rohár | 6da2335 | 2015-02-26 14:49:51 +0100 | [diff] [blame^] | 609 | ret = omap_device_enable(pdev); |
| 610 | if (ret) |
| 611 | return ret; |
Kevin Hilman | 345f79b | 2011-05-31 16:08:09 -0700 | [diff] [blame] | 612 | |
| 613 | return pm_generic_runtime_resume(dev); |
Kevin Hilman | 638080c | 2011-04-29 00:36:42 +0200 | [diff] [blame] | 614 | } |
Nishanth Menon | f5c33b0 | 2013-12-03 19:39:13 -0600 | [diff] [blame] | 615 | |
| 616 | static int _od_fail_runtime_suspend(struct device *dev) |
| 617 | { |
| 618 | dev_warn(dev, "%s: FIXME: missing hwmod/omap_dev info\n", __func__); |
| 619 | return -ENODEV; |
| 620 | } |
| 621 | |
| 622 | static int _od_fail_runtime_resume(struct device *dev) |
| 623 | { |
| 624 | dev_warn(dev, "%s: FIXME: missing hwmod/omap_dev info\n", __func__); |
| 625 | return -ENODEV; |
| 626 | } |
| 627 | |
Kevin Hilman | 256a543 | 2011-07-12 22:48:03 +0200 | [diff] [blame] | 628 | #endif |
Kevin Hilman | 638080c | 2011-04-29 00:36:42 +0200 | [diff] [blame] | 629 | |
Kevin Hilman | c03f007 | 2011-07-12 22:48:19 +0200 | [diff] [blame] | 630 | #ifdef CONFIG_SUSPEND |
| 631 | static int _od_suspend_noirq(struct device *dev) |
| 632 | { |
| 633 | struct platform_device *pdev = to_platform_device(dev); |
| 634 | struct omap_device *od = to_omap_device(pdev); |
| 635 | int ret; |
| 636 | |
Kevin Hilman | 72bb6f9 | 2012-07-10 15:29:04 -0700 | [diff] [blame] | 637 | /* Don't attempt late suspend on a driver that is not bound */ |
| 638 | if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER) |
| 639 | return 0; |
| 640 | |
Kevin Hilman | c03f007 | 2011-07-12 22:48:19 +0200 | [diff] [blame] | 641 | ret = pm_generic_suspend_noirq(dev); |
| 642 | |
| 643 | if (!ret && !pm_runtime_status_suspended(dev)) { |
| 644 | if (pm_generic_runtime_suspend(dev) == 0) { |
Nishanth Menon | 3522bf7 | 2013-11-14 11:05:16 -0600 | [diff] [blame] | 645 | pm_runtime_set_suspended(dev); |
Sourav Poddar | 4b7ec5a | 2013-04-27 01:55:34 +0530 | [diff] [blame] | 646 | omap_device_idle(pdev); |
Kevin Hilman | c03f007 | 2011-07-12 22:48:19 +0200 | [diff] [blame] | 647 | od->flags |= OMAP_DEVICE_SUSPENDED; |
| 648 | } |
| 649 | } |
| 650 | |
| 651 | return ret; |
| 652 | } |
| 653 | |
| 654 | static int _od_resume_noirq(struct device *dev) |
| 655 | { |
| 656 | struct platform_device *pdev = to_platform_device(dev); |
| 657 | struct omap_device *od = to_omap_device(pdev); |
| 658 | |
Nishanth Menon | 3522bf7 | 2013-11-14 11:05:16 -0600 | [diff] [blame] | 659 | if (od->flags & OMAP_DEVICE_SUSPENDED) { |
Kevin Hilman | c03f007 | 2011-07-12 22:48:19 +0200 | [diff] [blame] | 660 | od->flags &= ~OMAP_DEVICE_SUSPENDED; |
Sourav Poddar | 4b7ec5a | 2013-04-27 01:55:34 +0530 | [diff] [blame] | 661 | omap_device_enable(pdev); |
Nishanth Menon | 3522bf7 | 2013-11-14 11:05:16 -0600 | [diff] [blame] | 662 | /* |
| 663 | * XXX: we run before core runtime pm has resumed itself. At |
| 664 | * this point in time, we just restore the runtime pm state and |
| 665 | * considering symmetric operations in resume, we donot expect |
| 666 | * to fail. If we failed, something changed in core runtime_pm |
| 667 | * framework OR some device driver messed things up, hence, WARN |
| 668 | */ |
| 669 | WARN(pm_runtime_set_active(dev), |
| 670 | "Could not set %s runtime state active\n", dev_name(dev)); |
Kevin Hilman | c03f007 | 2011-07-12 22:48:19 +0200 | [diff] [blame] | 671 | pm_generic_runtime_resume(dev); |
| 672 | } |
| 673 | |
| 674 | return pm_generic_resume_noirq(dev); |
| 675 | } |
Kevin Hilman | 126caf1 | 2011-09-01 10:59:36 -0700 | [diff] [blame] | 676 | #else |
| 677 | #define _od_suspend_noirq NULL |
| 678 | #define _od_resume_noirq NULL |
Kevin Hilman | c03f007 | 2011-07-12 22:48:19 +0200 | [diff] [blame] | 679 | #endif |
| 680 | |
Nishanth Menon | f5c33b0 | 2013-12-03 19:39:13 -0600 | [diff] [blame] | 681 | struct dev_pm_domain omap_device_fail_pm_domain = { |
| 682 | .ops = { |
| 683 | SET_RUNTIME_PM_OPS(_od_fail_runtime_suspend, |
| 684 | _od_fail_runtime_resume, NULL) |
| 685 | } |
| 686 | }; |
| 687 | |
Kevin Hilman | 3ec2dec | 2012-02-15 11:47:45 -0800 | [diff] [blame] | 688 | struct dev_pm_domain omap_device_pm_domain = { |
Kevin Hilman | 638080c | 2011-04-29 00:36:42 +0200 | [diff] [blame] | 689 | .ops = { |
Kevin Hilman | 256a543 | 2011-07-12 22:48:03 +0200 | [diff] [blame] | 690 | SET_RUNTIME_PM_OPS(_od_runtime_suspend, _od_runtime_resume, |
Rafael J. Wysocki | 45f0a85 | 2013-06-03 21:49:52 +0200 | [diff] [blame] | 691 | NULL) |
Kevin Hilman | 638080c | 2011-04-29 00:36:42 +0200 | [diff] [blame] | 692 | USE_PLATFORM_PM_SLEEP_OPS |
Kevin Hilman | ff35336 | 2011-08-25 15:31:14 +0200 | [diff] [blame] | 693 | .suspend_noirq = _od_suspend_noirq, |
| 694 | .resume_noirq = _od_resume_noirq, |
Grygorii Strashko | 6248015 | 2015-02-25 16:13:50 +0200 | [diff] [blame] | 695 | .freeze_noirq = _od_suspend_noirq, |
| 696 | .thaw_noirq = _od_resume_noirq, |
| 697 | .restore_noirq = _od_resume_noirq, |
Kevin Hilman | 638080c | 2011-04-29 00:36:42 +0200 | [diff] [blame] | 698 | } |
| 699 | }; |
| 700 | |
Thara Gopinath | c23a97d | 2010-02-24 12:05:58 -0700 | [diff] [blame] | 701 | /** |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 702 | * omap_device_register - register an omap_device with one omap_hwmod |
| 703 | * @od: struct omap_device * to register |
| 704 | * |
| 705 | * Register the omap_device structure. This currently just calls |
| 706 | * platform_device_register() on the underlying platform_device. |
| 707 | * Returns the return value of platform_device_register(). |
| 708 | */ |
Ohad Ben-Cohen | 993e4fb | 2012-02-20 09:43:29 -0800 | [diff] [blame] | 709 | int omap_device_register(struct platform_device *pdev) |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 710 | { |
Kevin Hilman | bfae4f8 | 2011-07-21 14:47:53 -0700 | [diff] [blame] | 711 | pr_debug("omap_device: %s: registering\n", pdev->name); |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 712 | |
Kevin Hilman | bfae4f8 | 2011-07-21 14:47:53 -0700 | [diff] [blame] | 713 | pdev->dev.pm_domain = &omap_device_pm_domain; |
Kevin Hilman | d66b3fe | 2011-07-21 13:58:51 -0700 | [diff] [blame] | 714 | return platform_device_add(pdev); |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 715 | } |
| 716 | |
| 717 | |
| 718 | /* Public functions for use by device drivers through struct platform_data */ |
| 719 | |
| 720 | /** |
| 721 | * omap_device_enable - fully activate an omap_device |
| 722 | * @od: struct omap_device * to activate |
| 723 | * |
| 724 | * Do whatever is necessary for the hwmods underlying omap_device @od |
| 725 | * to be accessible and ready to operate. This generally involves |
| 726 | * enabling clocks, setting SYSCONFIG registers; and in the future may |
| 727 | * involve remuxing pins. Device drivers should call this function |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 728 | * indirectly via pm_runtime_get*(). Returns -EINVAL if called when |
| 729 | * the omap_device is already enabled, or passes along the return |
| 730 | * value of _omap_device_enable_hwmods(). |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 731 | */ |
| 732 | int omap_device_enable(struct platform_device *pdev) |
| 733 | { |
| 734 | int ret; |
| 735 | struct omap_device *od; |
| 736 | |
Kevin Hilman | 8f0d69d | 2011-07-09 19:15:20 -0600 | [diff] [blame] | 737 | od = to_omap_device(pdev); |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 738 | |
| 739 | if (od->_state == OMAP_DEVICE_STATE_ENABLED) { |
Kevin Hilman | 49882c9 | 2011-07-21 09:58:36 -0700 | [diff] [blame] | 740 | dev_warn(&pdev->dev, |
| 741 | "omap_device: %s() called from invalid state %d\n", |
| 742 | __func__, od->_state); |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 743 | return -EINVAL; |
| 744 | } |
| 745 | |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 746 | ret = _omap_device_enable_hwmods(od); |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 747 | |
Pali Rohár | 6da2335 | 2015-02-26 14:49:51 +0100 | [diff] [blame^] | 748 | if (ret == 0) |
| 749 | od->_state = OMAP_DEVICE_STATE_ENABLED; |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 750 | |
| 751 | return ret; |
| 752 | } |
| 753 | |
| 754 | /** |
| 755 | * omap_device_idle - idle an omap_device |
| 756 | * @od: struct omap_device * to idle |
| 757 | * |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 758 | * Idle omap_device @od. Device drivers call this function indirectly |
| 759 | * via pm_runtime_put*(). Returns -EINVAL if the omap_device is not |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 760 | * currently enabled, or passes along the return value of |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 761 | * _omap_device_idle_hwmods(). |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 762 | */ |
| 763 | int omap_device_idle(struct platform_device *pdev) |
| 764 | { |
| 765 | int ret; |
| 766 | struct omap_device *od; |
| 767 | |
Kevin Hilman | 8f0d69d | 2011-07-09 19:15:20 -0600 | [diff] [blame] | 768 | od = to_omap_device(pdev); |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 769 | |
| 770 | if (od->_state != OMAP_DEVICE_STATE_ENABLED) { |
Kevin Hilman | 49882c9 | 2011-07-21 09:58:36 -0700 | [diff] [blame] | 771 | dev_warn(&pdev->dev, |
| 772 | "omap_device: %s() called from invalid state %d\n", |
| 773 | __func__, od->_state); |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 774 | return -EINVAL; |
| 775 | } |
| 776 | |
Paul Walmsley | c1d1cd5 | 2013-01-26 00:48:53 -0700 | [diff] [blame] | 777 | ret = _omap_device_idle_hwmods(od); |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 778 | |
Pali Rohár | 6da2335 | 2015-02-26 14:49:51 +0100 | [diff] [blame^] | 779 | if (ret == 0) |
| 780 | od->_state = OMAP_DEVICE_STATE_IDLE; |
Paul Walmsley | b04b65a | 2009-09-03 20:14:05 +0300 | [diff] [blame] | 781 | |
| 782 | return ret; |
| 783 | } |
| 784 | |
| 785 | /** |
Omar Ramirez Luna | 8bb9fde | 2012-09-23 17:28:18 -0600 | [diff] [blame] | 786 | * omap_device_assert_hardreset - set a device's hardreset line |
| 787 | * @pdev: struct platform_device * to reset |
| 788 | * @name: const char * name of the reset line |
| 789 | * |
| 790 | * Set the hardreset line identified by @name on the IP blocks |
| 791 | * associated with the hwmods backing the platform_device @pdev. All |
| 792 | * of the hwmods associated with @pdev must have the same hardreset |
| 793 | * line linked to them for this to work. Passes along the return value |
| 794 | * of omap_hwmod_assert_hardreset() in the event of any failure, or |
| 795 | * returns 0 upon success. |
| 796 | */ |
| 797 | int omap_device_assert_hardreset(struct platform_device *pdev, const char *name) |
| 798 | { |
| 799 | struct omap_device *od = to_omap_device(pdev); |
| 800 | int ret = 0; |
| 801 | int i; |
| 802 | |
| 803 | for (i = 0; i < od->hwmods_cnt; i++) { |
| 804 | ret = omap_hwmod_assert_hardreset(od->hwmods[i], name); |
| 805 | if (ret) |
| 806 | break; |
| 807 | } |
| 808 | |
| 809 | return ret; |
| 810 | } |
| 811 | |
| 812 | /** |
| 813 | * omap_device_deassert_hardreset - release a device's hardreset line |
| 814 | * @pdev: struct platform_device * to reset |
| 815 | * @name: const char * name of the reset line |
| 816 | * |
| 817 | * Release the hardreset line identified by @name on the IP blocks |
| 818 | * associated with the hwmods backing the platform_device @pdev. All |
| 819 | * of the hwmods associated with @pdev must have the same hardreset |
| 820 | * line linked to them for this to work. Passes along the return |
| 821 | * value of omap_hwmod_deassert_hardreset() in the event of any |
| 822 | * failure, or returns 0 upon success. |
| 823 | */ |
| 824 | int omap_device_deassert_hardreset(struct platform_device *pdev, |
| 825 | const char *name) |
| 826 | { |
| 827 | struct omap_device *od = to_omap_device(pdev); |
| 828 | int ret = 0; |
| 829 | int i; |
| 830 | |
| 831 | for (i = 0; i < od->hwmods_cnt; i++) { |
| 832 | ret = omap_hwmod_deassert_hardreset(od->hwmods[i], name); |
| 833 | if (ret) |
| 834 | break; |
| 835 | } |
| 836 | |
| 837 | return ret; |
| 838 | } |
| 839 | |
| 840 | /** |
Nishanth Menon | 1f8a7d5 | 2011-07-27 15:02:32 -0500 | [diff] [blame] | 841 | * omap_device_get_by_hwmod_name() - convert a hwmod name to |
| 842 | * device pointer. |
| 843 | * @oh_name: name of the hwmod device |
| 844 | * |
| 845 | * Returns back a struct device * pointer associated with a hwmod |
| 846 | * device represented by a hwmod_name |
| 847 | */ |
| 848 | struct device *omap_device_get_by_hwmod_name(const char *oh_name) |
| 849 | { |
| 850 | struct omap_hwmod *oh; |
| 851 | |
| 852 | if (!oh_name) { |
| 853 | WARN(1, "%s: no hwmod name!\n", __func__); |
| 854 | return ERR_PTR(-EINVAL); |
| 855 | } |
| 856 | |
| 857 | oh = omap_hwmod_lookup(oh_name); |
Russell King | 857835c | 2013-02-24 10:56:59 +0000 | [diff] [blame] | 858 | if (!oh) { |
Nishanth Menon | 1f8a7d5 | 2011-07-27 15:02:32 -0500 | [diff] [blame] | 859 | WARN(1, "%s: no hwmod for %s\n", __func__, |
| 860 | oh_name); |
Russell King | 857835c | 2013-02-24 10:56:59 +0000 | [diff] [blame] | 861 | return ERR_PTR(-ENODEV); |
Nishanth Menon | 1f8a7d5 | 2011-07-27 15:02:32 -0500 | [diff] [blame] | 862 | } |
Russell King | 857835c | 2013-02-24 10:56:59 +0000 | [diff] [blame] | 863 | if (!oh->od) { |
Nishanth Menon | 1f8a7d5 | 2011-07-27 15:02:32 -0500 | [diff] [blame] | 864 | WARN(1, "%s: no omap_device for %s\n", __func__, |
| 865 | oh_name); |
Russell King | 857835c | 2013-02-24 10:56:59 +0000 | [diff] [blame] | 866 | return ERR_PTR(-ENODEV); |
Nishanth Menon | 1f8a7d5 | 2011-07-27 15:02:32 -0500 | [diff] [blame] | 867 | } |
| 868 | |
Nishanth Menon | 1f8a7d5 | 2011-07-27 15:02:32 -0500 | [diff] [blame] | 869 | return &oh->od->pdev->dev; |
| 870 | } |
Kevin Hilman | 0d5e825 | 2010-08-23 08:10:55 -0700 | [diff] [blame] | 871 | |
Benoit Cousson | dc2d07e | 2011-08-10 13:32:08 +0200 | [diff] [blame] | 872 | static struct notifier_block platform_nb = { |
| 873 | .notifier_call = _omap_device_notifier_call, |
| 874 | }; |
| 875 | |
Kevin Hilman | 0d5e825 | 2010-08-23 08:10:55 -0700 | [diff] [blame] | 876 | static int __init omap_device_init(void) |
| 877 | { |
Benoit Cousson | dc2d07e | 2011-08-10 13:32:08 +0200 | [diff] [blame] | 878 | bus_register_notifier(&platform_bus_type, &platform_nb); |
Kevin Hilman | 3ec2dec | 2012-02-15 11:47:45 -0800 | [diff] [blame] | 879 | return 0; |
Kevin Hilman | 0d5e825 | 2010-08-23 08:10:55 -0700 | [diff] [blame] | 880 | } |
Tony Lindgren | b76c8b1 | 2013-01-11 11:24:18 -0800 | [diff] [blame] | 881 | omap_core_initcall(omap_device_init); |
Kevin Hilman | 9634c8d | 2012-07-10 15:06:11 -0700 | [diff] [blame] | 882 | |
| 883 | /** |
| 884 | * omap_device_late_idle - idle devices without drivers |
| 885 | * @dev: struct device * associated with omap_device |
| 886 | * @data: unused |
| 887 | * |
| 888 | * Check the driver bound status of this device, and idle it |
| 889 | * if there is no driver attached. |
| 890 | */ |
| 891 | static int __init omap_device_late_idle(struct device *dev, void *data) |
| 892 | { |
| 893 | struct platform_device *pdev = to_platform_device(dev); |
| 894 | struct omap_device *od = to_omap_device(pdev); |
Rajendra Nayak | f66e329 | 2013-07-28 23:01:50 -0600 | [diff] [blame] | 895 | int i; |
Kevin Hilman | 9634c8d | 2012-07-10 15:06:11 -0700 | [diff] [blame] | 896 | |
| 897 | if (!od) |
| 898 | return 0; |
| 899 | |
| 900 | /* |
| 901 | * If omap_device state is enabled, but has no driver bound, |
| 902 | * idle it. |
| 903 | */ |
Rajendra Nayak | f66e329 | 2013-07-28 23:01:50 -0600 | [diff] [blame] | 904 | |
| 905 | /* |
| 906 | * Some devices (like memory controllers) are always kept |
| 907 | * enabled, and should not be idled even with no drivers. |
| 908 | */ |
| 909 | for (i = 0; i < od->hwmods_cnt; i++) |
| 910 | if (od->hwmods[i]->flags & HWMOD_INIT_NO_IDLE) |
| 911 | return 0; |
| 912 | |
Kevin Hilman | 9634c8d | 2012-07-10 15:06:11 -0700 | [diff] [blame] | 913 | if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER) { |
| 914 | if (od->_state == OMAP_DEVICE_STATE_ENABLED) { |
| 915 | dev_warn(dev, "%s: enabled but no driver. Idling\n", |
| 916 | __func__); |
| 917 | omap_device_idle(pdev); |
| 918 | } |
| 919 | } |
| 920 | |
| 921 | return 0; |
| 922 | } |
| 923 | |
| 924 | static int __init omap_device_late_init(void) |
| 925 | { |
| 926 | bus_for_each_dev(&platform_bus_type, NULL, NULL, omap_device_late_idle); |
Tony Lindgren | 4b91f7f | 2014-10-27 13:05:54 -0700 | [diff] [blame] | 927 | |
| 928 | WARN(!of_have_populated_dt(), |
| 929 | "legacy booting deprecated, please update to boot with .dts\n"); |
| 930 | |
Kevin Hilman | 9634c8d | 2012-07-10 15:06:11 -0700 | [diff] [blame] | 931 | return 0; |
| 932 | } |
Kevin Hilman | e7e17c5 | 2013-05-08 16:48:01 -0700 | [diff] [blame] | 933 | omap_late_initcall_sync(omap_device_late_init); |