1 /** 2 * OMAP1 Dual-Mode Timers - platform device registration 3 * 4 * Contains first level initialization routines which internally 5 * generates timer device information and registers with linux 6 * device model. It also has low level function to chnage the timer 7 * input clock source. 8 * 9 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ 10 * Tarun Kanti DebBarma <tarun.kanti@ti.com> 11 * Thara Gopinath <thara@ti.com> 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License version 2 as 15 * published by the Free Software Foundation. 16 * 17 * This program is distributed "as is" WITHOUT ANY WARRANTY of any 18 * kind, whether express or implied; without even the implied warranty 19 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 */ 22 23 #include <linux/clk.h> 24 #include <linux/io.h> 25 #include <linux/err.h> 26 #include <linux/slab.h> 27 #include <linux/platform_device.h> 28 #include <linux/platform_data/dmtimer-omap.h> 29 30 #include <plat/dmtimer.h> 31 32 #include "soc.h" 33 34 #define OMAP1610_GPTIMER1_BASE 0xfffb1400 35 #define OMAP1610_GPTIMER2_BASE 0xfffb1c00 36 #define OMAP1610_GPTIMER3_BASE 0xfffb2400 37 #define OMAP1610_GPTIMER4_BASE 0xfffb2c00 38 #define OMAP1610_GPTIMER5_BASE 0xfffb3400 39 #define OMAP1610_GPTIMER6_BASE 0xfffb3c00 40 #define OMAP1610_GPTIMER7_BASE 0xfffb7400 41 #define OMAP1610_GPTIMER8_BASE 0xfffbd400 42 43 #define OMAP1_DM_TIMER_COUNT 8 44 45 static int omap1_dm_timer_set_src(struct platform_device *pdev, 46 int source) 47 { 48 int n = (pdev->id - 1) << 1; 49 u32 l; 50 51 l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n); 52 l |= source << n; 53 omap_writel(l, MOD_CONF_CTRL_1); 54 55 return 0; 56 } 57 58 static int __init omap1_dm_timer_init(void) 59 { 60 int i; 61 int ret; 62 struct dmtimer_platform_data *pdata; 63 struct platform_device *pdev; 64 65 if (!cpu_is_omap16xx()) 66 return 0; 67 68 for (i = 1; i <= OMAP1_DM_TIMER_COUNT; i++) { 69 struct resource res[2]; 70 u32 base, irq; 71 72 switch (i) { 73 case 1: 74 base = OMAP1610_GPTIMER1_BASE; 75 irq = INT_1610_GPTIMER1; 76 break; 77 case 2: 78 base = OMAP1610_GPTIMER2_BASE; 79 irq = INT_1610_GPTIMER2; 80 break; 81 case 3: 82 base = OMAP1610_GPTIMER3_BASE; 83 irq = INT_1610_GPTIMER3; 84 break; 85 case 4: 86 base = OMAP1610_GPTIMER4_BASE; 87 irq = INT_1610_GPTIMER4; 88 break; 89 case 5: 90 base = OMAP1610_GPTIMER5_BASE; 91 irq = INT_1610_GPTIMER5; 92 break; 93 case 6: 94 base = OMAP1610_GPTIMER6_BASE; 95 irq = INT_1610_GPTIMER6; 96 break; 97 case 7: 98 base = OMAP1610_GPTIMER7_BASE; 99 irq = INT_1610_GPTIMER7; 100 break; 101 case 8: 102 base = OMAP1610_GPTIMER8_BASE; 103 irq = INT_1610_GPTIMER8; 104 break; 105 default: 106 /* 107 * not supposed to reach here. 108 * this is to remove warning. 109 */ 110 return -EINVAL; 111 } 112 113 pdev = platform_device_alloc("omap_timer", i); 114 if (!pdev) { 115 pr_err("%s: Failed to device alloc for dmtimer%d\n", 116 __func__, i); 117 return -ENOMEM; 118 } 119 120 memset(res, 0, 2 * sizeof(struct resource)); 121 res[0].start = base; 122 res[0].end = base + 0x46; 123 res[0].flags = IORESOURCE_MEM; 124 res[1].start = irq; 125 res[1].end = irq; 126 res[1].flags = IORESOURCE_IRQ; 127 ret = platform_device_add_resources(pdev, res, 128 ARRAY_SIZE(res)); 129 if (ret) { 130 dev_err(&pdev->dev, "%s: Failed to add resources.\n", 131 __func__); 132 goto err_free_pdev; 133 } 134 135 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); 136 if (!pdata) { 137 dev_err(&pdev->dev, "%s: Failed to allocate pdata.\n", 138 __func__); 139 ret = -ENOMEM; 140 goto err_free_pdata; 141 } 142 143 pdata->set_timer_src = omap1_dm_timer_set_src; 144 pdata->timer_capability = OMAP_TIMER_ALWON | 145 OMAP_TIMER_NEEDS_RESET | OMAP_TIMER_HAS_DSP_IRQ; 146 147 ret = platform_device_add_data(pdev, pdata, sizeof(*pdata)); 148 if (ret) { 149 dev_err(&pdev->dev, "%s: Failed to add platform data.\n", 150 __func__); 151 goto err_free_pdata; 152 } 153 154 ret = platform_device_add(pdev); 155 if (ret) { 156 dev_err(&pdev->dev, "%s: Failed to add platform device.\n", 157 __func__); 158 goto err_free_pdata; 159 } 160 161 dev_dbg(&pdev->dev, " Registered.\n"); 162 } 163 164 return 0; 165 166 err_free_pdata: 167 kfree(pdata); 168 169 err_free_pdev: 170 platform_device_unregister(pdev); 171 172 return ret; 173 } 174 arch_initcall(omap1_dm_timer_init); 175