Paul Mackerras | 2e686bc | 2005-10-06 13:22:17 +1000 | [diff] [blame] | 1 | #include <linux/string.h> |
| 2 | #include <linux/kernel.h> |
Stephen Rothwell | f85ff30 | 2007-05-01 16:40:36 +1000 | [diff] [blame] | 3 | #include <linux/of.h> |
Paul Mackerras | 2e686bc | 2005-10-06 13:22:17 +1000 | [diff] [blame] | 4 | #include <linux/init.h> |
| 5 | #include <linux/module.h> |
| 6 | #include <linux/mod_devicetable.h> |
Paul Mackerras | 734d652 | 2005-10-31 13:57:01 +1100 | [diff] [blame] | 7 | #include <linux/slab.h> |
Jon Loeliger | 0173d42 | 2008-01-08 05:07:15 +1100 | [diff] [blame] | 8 | #include <linux/of_device.h> |
Paul Mackerras | 734d652 | 2005-10-31 13:57:01 +1100 | [diff] [blame] | 9 | |
Paul Mackerras | 2e686bc | 2005-10-06 13:22:17 +1000 | [diff] [blame] | 10 | #include <asm/errno.h> |
Joachim Fenkes | fec738d | 2007-09-26 19:44:12 +1000 | [diff] [blame] | 11 | #include <asm/dcr.h> |
Paul Mackerras | 2e686bc | 2005-10-06 13:22:17 +1000 | [diff] [blame] | 12 | |
Joachim Fenkes | fec738d | 2007-09-26 19:44:12 +1000 | [diff] [blame] | 13 | static void of_device_make_bus_id(struct of_device *dev) |
| 14 | { |
| 15 | static atomic_t bus_no_reg_magic; |
| 16 | struct device_node *node = dev->node; |
Joachim Fenkes | fec738d | 2007-09-26 19:44:12 +1000 | [diff] [blame] | 17 | const u32 *reg; |
| 18 | u64 addr; |
| 19 | int magic; |
| 20 | |
| 21 | /* |
| 22 | * If it's a DCR based device, use 'd' for native DCRs |
| 23 | * and 'D' for MMIO DCRs. |
| 24 | */ |
| 25 | #ifdef CONFIG_PPC_DCR |
| 26 | reg = of_get_property(node, "dcr-reg", NULL); |
| 27 | if (reg) { |
| 28 | #ifdef CONFIG_PPC_DCR_NATIVE |
Kay Sievers | aab0d37 | 2008-12-04 10:02:56 -0800 | [diff] [blame] | 29 | dev_set_name(&dev->dev, "d%x.%s", *reg, node->name); |
Joachim Fenkes | fec738d | 2007-09-26 19:44:12 +1000 | [diff] [blame] | 30 | #else /* CONFIG_PPC_DCR_NATIVE */ |
| 31 | addr = of_translate_dcr_address(node, *reg, NULL); |
| 32 | if (addr != OF_BAD_ADDR) { |
Kay Sievers | aab0d37 | 2008-12-04 10:02:56 -0800 | [diff] [blame] | 33 | dev_set_name(&dev->dev, "D%llx.%s", |
| 34 | (unsigned long long)addr, node->name); |
Joachim Fenkes | fec738d | 2007-09-26 19:44:12 +1000 | [diff] [blame] | 35 | return; |
| 36 | } |
| 37 | #endif /* !CONFIG_PPC_DCR_NATIVE */ |
| 38 | } |
| 39 | #endif /* CONFIG_PPC_DCR */ |
| 40 | |
| 41 | /* |
| 42 | * For MMIO, get the physical address |
| 43 | */ |
| 44 | reg = of_get_property(node, "reg", NULL); |
| 45 | if (reg) { |
| 46 | addr = of_translate_address(node, reg); |
| 47 | if (addr != OF_BAD_ADDR) { |
Kay Sievers | aab0d37 | 2008-12-04 10:02:56 -0800 | [diff] [blame] | 48 | dev_set_name(&dev->dev, "%llx.%s", |
| 49 | (unsigned long long)addr, node->name); |
Joachim Fenkes | fec738d | 2007-09-26 19:44:12 +1000 | [diff] [blame] | 50 | return; |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | /* |
| 55 | * No BusID, use the node name and add a globally incremented |
| 56 | * counter (and pray...) |
| 57 | */ |
| 58 | magic = atomic_add_return(1, &bus_no_reg_magic); |
Kay Sievers | aab0d37 | 2008-12-04 10:02:56 -0800 | [diff] [blame] | 59 | dev_set_name(&dev->dev, "%s.%d", node->name, magic - 1); |
Joachim Fenkes | fec738d | 2007-09-26 19:44:12 +1000 | [diff] [blame] | 60 | } |
| 61 | |
| 62 | struct of_device *of_device_alloc(struct device_node *np, |
| 63 | const char *bus_id, |
| 64 | struct device *parent) |
| 65 | { |
| 66 | struct of_device *dev; |
| 67 | |
| 68 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 69 | if (!dev) |
| 70 | return NULL; |
| 71 | |
| 72 | dev->node = of_node_get(np); |
| 73 | dev->dev.dma_mask = &dev->dma_mask; |
| 74 | dev->dev.parent = parent; |
| 75 | dev->dev.release = of_release_dev; |
| 76 | dev->dev.archdata.of_node = np; |
Joachim Fenkes | fec738d | 2007-09-26 19:44:12 +1000 | [diff] [blame] | 77 | |
| 78 | if (bus_id) |
Kay Sievers | aab0d37 | 2008-12-04 10:02:56 -0800 | [diff] [blame] | 79 | dev_set_name(&dev->dev, bus_id); |
Joachim Fenkes | fec738d | 2007-09-26 19:44:12 +1000 | [diff] [blame] | 80 | else |
| 81 | of_device_make_bus_id(dev); |
| 82 | |
| 83 | return dev; |
| 84 | } |
| 85 | EXPORT_SYMBOL(of_device_alloc); |
| 86 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 87 | int of_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
Sylvain Munaut | eb0cb8a | 2007-02-12 23:13:25 +0100 | [diff] [blame] | 88 | { |
| 89 | struct of_device *ofdev; |
| 90 | const char *compat; |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 91 | int seen = 0, cplen, sl; |
Sylvain Munaut | eb0cb8a | 2007-02-12 23:13:25 +0100 | [diff] [blame] | 92 | |
| 93 | if (!dev) |
| 94 | return -ENODEV; |
| 95 | |
| 96 | ofdev = to_of_device(dev); |
| 97 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 98 | if (add_uevent_var(env, "OF_NAME=%s", ofdev->node->name)) |
Sylvain Munaut | eb0cb8a | 2007-02-12 23:13:25 +0100 | [diff] [blame] | 99 | return -ENOMEM; |
| 100 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 101 | if (add_uevent_var(env, "OF_TYPE=%s", ofdev->node->type)) |
Sylvain Munaut | eb0cb8a | 2007-02-12 23:13:25 +0100 | [diff] [blame] | 102 | return -ENOMEM; |
| 103 | |
| 104 | /* Since the compatible field can contain pretty much anything |
| 105 | * it's not really legal to split it out with commas. We split it |
| 106 | * up using a number of environment variables instead. */ |
| 107 | |
Stephen Rothwell | b3a6d2a | 2007-04-13 17:14:22 +1000 | [diff] [blame] | 108 | compat = of_get_property(ofdev->node, "compatible", &cplen); |
Sylvain Munaut | eb0cb8a | 2007-02-12 23:13:25 +0100 | [diff] [blame] | 109 | while (compat && *compat && cplen > 0) { |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 110 | if (add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat)) |
Sylvain Munaut | eb0cb8a | 2007-02-12 23:13:25 +0100 | [diff] [blame] | 111 | return -ENOMEM; |
| 112 | |
| 113 | sl = strlen (compat) + 1; |
| 114 | compat += sl; |
| 115 | cplen -= sl; |
| 116 | seen++; |
| 117 | } |
| 118 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 119 | if (add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen)) |
Sylvain Munaut | eb0cb8a | 2007-02-12 23:13:25 +0100 | [diff] [blame] | 120 | return -ENOMEM; |
| 121 | |
| 122 | /* modalias is trickier, we add it in 2 steps */ |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 123 | if (add_uevent_var(env, "MODALIAS=")) |
Sylvain Munaut | eb0cb8a | 2007-02-12 23:13:25 +0100 | [diff] [blame] | 124 | return -ENOMEM; |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 125 | sl = of_device_get_modalias(ofdev, &env->buf[env->buflen-1], |
| 126 | sizeof(env->buf) - env->buflen); |
| 127 | if (sl >= (sizeof(env->buf) - env->buflen)) |
Sylvain Munaut | eb0cb8a | 2007-02-12 23:13:25 +0100 | [diff] [blame] | 128 | return -ENOMEM; |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 129 | env->buflen += sl; |
Sylvain Munaut | eb0cb8a | 2007-02-12 23:13:25 +0100 | [diff] [blame] | 130 | |
| 131 | return 0; |
| 132 | } |
Sylvain Munaut | eb0cb8a | 2007-02-12 23:13:25 +0100 | [diff] [blame] | 133 | EXPORT_SYMBOL(of_device_uevent); |
Sylvain Munaut | de41189 | 2007-05-07 01:38:46 +1000 | [diff] [blame] | 134 | EXPORT_SYMBOL(of_device_get_modalias); |