projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| b54f2863 BN |
1 | /* |
| 2 | * UIO SMX Cryptengine driver. | |
| 3 | * | |
| 4 | * (C) 2008 Nias Digital P/L <bn@niasdigital.com> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License version 2 as | |
| 8 | * published by the Free Software Foundation. | |
| 9 | * | |
| 10 | */ | |
| 11 | ||
| 12 | #include <linux/device.h> | |
| 13 | #include <linux/module.h> | |
| 14 | #include <linux/platform_device.h> | |
| 15 | #include <linux/uio_driver.h> | |
| 16 | #include <linux/io.h> | |
| 17 | ||
| 18 | #define DRV_NAME "smx-ce" | |
| 19 | #define DRV_VERSION "0.03" | |
| 20 | ||
| 21 | #define SMX_CSR 0x00000000 | |
| 22 | #define SMX_EnD 0x00000001 | |
| 23 | #define SMX_RUN 0x00000002 | |
| 24 | #define SMX_DRDY 0x00000004 | |
| 25 | #define SMX_ERR 0x00000008 | |
| 26 | ||
| 27 | static irqreturn_t smx_handler(int irq, struct uio_info *dev_info) | |
| 28 | { | |
| 29 | void __iomem *csr = dev_info->mem[0].internal_addr + SMX_CSR; | |
| 30 | ||
| 31 | u32 status = ioread32(csr); | |
| 32 | ||
| 33 | if (!(status & SMX_DRDY)) | |
| 34 | return IRQ_NONE; | |
| 35 | ||
| 36 | /* Disable interrupt */ | |
| 37 | iowrite32(status & ~SMX_DRDY, csr); | |
| 38 | return IRQ_HANDLED; | |
| 39 | } | |
| 40 | ||
| 41 | static int __devinit smx_ce_probe(struct platform_device *dev) | |
| 42 | { | |
| 43 | ||
| 44 | int ret = -ENODEV; | |
| 45 | struct uio_info *info; | |
| 46 | struct resource *regs; | |
| 47 | ||
| 48 | info = kzalloc(sizeof(struct uio_info), GFP_KERNEL); | |
| 49 | if (!info) | |
| 50 | return -ENOMEM; | |
| 51 | ||
| 52 | regs = platform_get_resource(dev, IORESOURCE_MEM, 0); | |
| 53 | if (!regs) { | |
| 54 | dev_err(&dev->dev, "No memory resource specified\n"); | |
| 55 | goto out_free; | |
| 56 | } | |
| 57 | ||
| 58 | info->mem[0].addr = regs->start; | |
| 59 | if (!info->mem[0].addr) { | |
| 60 | dev_err(&dev->dev, "Invalid memory resource\n"); | |
| 61 | goto out_free; | |
| 62 | } | |
| 63 | ||
| 64 | info->mem[0].size = regs->end - regs->start + 1; | |
| 65 | info->mem[0].internal_addr = ioremap(regs->start, info->mem[0].size); | |
| 66 | ||
| 67 | if (!info->mem[0].internal_addr) { | |
| 68 | dev_err(&dev->dev, "Can't remap memory address range\n"); | |
| 69 | goto out_free; | |
| 70 | } | |
| 71 | ||
| 72 | info->mem[0].memtype = UIO_MEM_PHYS; | |
| 73 | ||
| 74 | info->name = "smx-ce"; | |
| 75 | info->version = "0.03"; | |
| 76 | ||
| 77 | info->irq = platform_get_irq(dev, 0); | |
| 78 | if (info->irq < 0) { | |
| 79 | ret = info->irq; | |
| 80 | dev_err(&dev->dev, "No (or invalid) IRQ resource specified\n"); | |
| 81 | goto out_unmap; | |
| 82 | } | |
| 83 | ||
| 84 | info->irq_flags = IRQF_SHARED; | |
| 85 | info->handler = smx_handler; | |
| 86 | ||
| 87 | platform_set_drvdata(dev, info); | |
| 88 | ||
| 89 | ret = uio_register_device(&dev->dev, info); | |
| 90 | ||
| 91 | if (ret) | |
| 92 | goto out_unmap; | |
| 93 | ||
| 94 | return 0; | |
| 95 | ||
| 96 | out_unmap: | |
| 97 | iounmap(info->mem[0].internal_addr); | |
| 98 | out_free: | |
| 99 | kfree(info); | |
| 100 | ||
| 101 | return ret; | |
| 102 | } | |
| 103 | ||
| 104 | static int __devexit smx_ce_remove(struct platform_device *dev) | |
| 105 | { | |
| 106 | struct uio_info *info = platform_get_drvdata(dev); | |
| 107 | ||
| 108 | uio_unregister_device(info); | |
| 109 | platform_set_drvdata(dev, NULL); | |
| 110 | iounmap(info->mem[0].internal_addr); | |
| 111 | ||
| 112 | kfree(info); | |
| 113 | ||
| 114 | return 0; | |
| 115 | } | |
| 116 | ||
| 117 | static struct platform_driver smx_ce_driver = { | |
| 118 | .probe = smx_ce_probe, | |
| 119 | .remove = __devexit_p(smx_ce_remove), | |
| 120 | .driver = { | |
| 121 | .name = DRV_NAME, | |
| 122 | .owner = THIS_MODULE, | |
| 123 | }, | |
| 124 | }; | |
| 125 | ||
| 126 | static int __init smx_ce_init_module(void) | |
| 127 | { | |
| 128 | return platform_driver_register(&smx_ce_driver); | |
| 129 | } | |
| 130 | module_init(smx_ce_init_module); | |
| 131 | ||
| 132 | static void __exit smx_ce_exit_module(void) | |
| 133 | { | |
| 134 | platform_driver_unregister(&smx_ce_driver); | |
| 135 | } | |
| 136 | module_exit(smx_ce_exit_module); | |
| 137 | ||
| 138 | MODULE_LICENSE("GPL v2"); | |
| 139 | MODULE_VERSION(DRV_VERSION); | |
| 140 | MODULE_AUTHOR("Ben Nizette <bn@niasdigital.com>"); |