litmus-rt.git - The LITMUS^RT kernel.

diff options

author	Amit Shah <amit.shah@redhat.com>	2009-12-21 11:06:04 -0500
committer	Rusty Russell <rusty@rustcorp.com.au>	2010-02-23 22:52:53 -0500
commit	fb08bd274df61967f40d49c4625fe6ed75a69ab5 (patch)
tree	911fa24e1b916ad70cff10feeed17bba1de037b1 /lib
parent	b766ceed5bbf04ae153389f5a15f53b9b6106a35 (diff)

virtio: console: Associate each port with a char device

The char device will be used as an interface by applications on the guest to communicate with apps on the host. The devices created are placed in /dev/vportNpn where N is the virtio-console device number and n is the port number for that device. One dynamic major device number is allocated for each device and minor numbers are allocated for the ports contained within that device. The file operation for the char devs will be added in the following commits. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Diffstat (limited to 'lib')

0 files changed, 0 insertions, 0 deletions

58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142

/** * OMAP1 Dual-Mode Timers - platform device registration * * Contains first level initialization routines which internally * generates timer device information and registers with linux * device model. It also has low level function to chnage the timer * input clock source. * * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ * Tarun Kanti DebBarma <tarun.kanti@ti.com> * Thara Gopinath <thara@ti.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed "as is" WITHOUT ANY WARRANTY of any * kind, whether express or implied; without even the implied warranty * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/clk.h> #include <linux/io.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/platform_device.h> #include <mach/irqs.h> #include <plat/dmtimer.h> #define OMAP1610_GPTIMER1_BASE 0xfffb1400 #define OMAP1610_GPTIMER2_BASE 0xfffb1c00 #define OMAP1610_GPTIMER3_BASE 0xfffb2400 #define OMAP1610_GPTIMER4_BASE 0xfffb2c00 #define OMAP1610_GPTIMER5_BASE 0xfffb3400 #define OMAP1610_GPTIMER6_BASE 0xfffb3c00 #define OMAP1610_GPTIMER7_BASE 0xfffb7400 #define OMAP1610_GPTIMER8_BASE 0xfffbd400 #define OMAP1_DM_TIMER_COUNT 8 static int omap1_dm_timer_set_src(struct platform_device *pdev, int source) { int n = (pdev->id - 1) << 1; u32 l; l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n); l |= source << n; omap_writel(l, MOD_CONF_CTRL_1); return 0; } static int __init omap1_dm_timer_init(void) { int i; int ret; struct dmtimer_platform_data *pdata; struct platform_device *pdev; if (!cpu_is_omap16xx()) return 0; for (i = 1; i <= OMAP1_DM_TIMER_COUNT; i++) { struct resource res[2]; u32 base, irq; switch (i) { case 1: base = OMAP1610_GPTIMER1_BASE; irq = INT_1610_GPTIMER1; break; case 2: base = OMAP1610_GPTIMER2_BASE; irq = INT_1610_GPTIMER2; break; case 3: base = OMAP1610_GPTIMER3_BASE; irq = INT_1610_GPTIMER3; break; case 4: base = OMAP1610_GPTIMER4_BASE; irq = INT_1610_GPTIMER4; break; case 5: base = OMAP1610_GPTIMER5_BASE; irq = INT_1610_GPTIMER5; break; case 6: base = OMAP1610_GPTIMER6_BASE; irq = INT_1610_GPTIMER6; break; case 7: base = OMAP1610_GPTIMER7_BASE; irq = INT_1610_GPTIMER7; break; case 8: base = OMAP1610_GPTIMER8_BASE; irq = INT_1610_GPTIMER8; break; default: /* * not supposed to reach here. * this is to remove warning. */ return -EINVAL; } pdev = platform_device_alloc("omap_timer", i); if (!pdev) { pr_err("%s: Failed to device alloc for dmtimer%d\n", __func__, i); return -ENOMEM; } memset(res, 0, 2 * sizeof(struct resource)); res[0].start = base; res[0].end = base + 0x46; res[0].flags = IORESOURCE_MEM; res[1].start = irq; res[1].end = irq; res[1].flags = IORESOURCE_IRQ; ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res)); if (ret) { dev_err(&pdev->dev, "%s: Failed to add resources.\n", __func__); goto err_free_pdev; } pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); if (!pdata) { dev_err(&pdev->dev, "%s: Failed to allocate pdata.\n", __func__); ret = -ENOMEM; goto err_free_pdata; } pdata->set_timer_src = omap1_dm_timer_set_src; pdata->timer_capability = OMAP_TIMER_ALWON | OMAP_TIMER_NEEDS_RESET | OMAP_TIMER_HAS_DSP_IRQ; ret = platform_device_add_data(pdev, pdata, sizeof(*pdata)); if (ret) { dev_err(&pdev->dev, "%s: Failed to add platform data.\n", __func__); goto err_free_pdata; } ret = platform_device_add(pdev); if (ret) { dev_err(&pdev->dev, "%s: Failed to add platform device.\n", __func__); goto err_free_pdata; } dev_dbg(&pdev->dev, " Registered.\n"); } return 0; err_free_pdata: kfree(pdata); err_free_pdev: platform_device_unregister(pdev); return ret; } arch_initcall(omap1_dm_timer_init);


context:
space:
mode: