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 29 #include <mach/irqs.h> 30 31 #include <plat/dmtimer.h> 32 33 #define OMAP1610_GPTIMER1_BASE 0xfffb1400 34 #define OMAP1610_GPTIMER2_BASE 0xfffb1c00 35 #define OMAP1610_GPTIMER3_BASE 0xfffb2400 36 #define OMAP1610_GPTIMER4_BASE 0xfffb2c00 37 #define OMAP1610_GPTIMER5_BASE 0xfffb3400 38 #define OMAP1610_GPTIMER6_BASE 0xfffb3c00 39 #define OMAP1610_GPTIMER7_BASE 0xfffb7400 40 #define OMAP1610_GPTIMER8_BASE 0xfffbd400 41 42 #define OMAP1_DM_TIMER_COUNT 8 43 44 static int omap1_dm_timer_set_src(struct platform_device *pdev, 45 int source) 46 { 47 int n = (pdev->id - 1) << 1; 48 u32 l; 49 50 l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n); 51 l |= source << n; 52 omap_writel(l, MOD_CONF_CTRL_1); 53 54 return 0; 55 } 56 57 static int __init omap1_dm_timer_init(void) 58 { 59 int i; 60 int ret; 61 struct dmtimer_platform_data *pdata; 62 struct platform_device *pdev; 63 64 if (!cpu_is_omap16xx()) 65 return 0; 66 67 for (i = 1; i <= OMAP1_DM_TIMER_COUNT; i++) { 68 struct resource res[2]; 69 u32 base, irq; 70 71 switch (i) { 72 case 1: 73 base = OMAP1610_GPTIMER1_BASE; 74 irq = INT_1610_GPTIMER1; 75 break; 76 case 2: 77 base = OMAP1610_GPTIMER2_BASE; 78 irq = INT_1610_GPTIMER2; 79 break; 80 case 3: 81 base = OMAP1610_GPTIMER3_BASE; 82 irq = INT_1610_GPTIMER3; 83 break; 84 case 4: 85 base = OMAP1610_GPTIMER4_BASE; 86 irq = INT_1610_GPTIMER4; 87 break; 88 case 5: 89 base = OMAP1610_GPTIMER5_BASE; 90 irq = INT_1610_GPTIMER5; 91 break; 92 case 6: 93 base = OMAP1610_GPTIMER6_BASE; 94 irq = INT_1610_GPTIMER6; 95 break; 96 case 7: 97 base = OMAP1610_GPTIMER7_BASE; 98 irq = INT_1610_GPTIMER7; 99 break; 100 case 8: 101 base = OMAP1610_GPTIMER8_BASE; 102 irq = INT_1610_GPTIMER8; 103 break; 104 default: 105 /* 106 * not supposed to reach here. 107 * this is to remove warning. 108 */ 109 return -EINVAL; 110 } 111 112 pdev = platform_device_alloc("omap_timer", i); 113 if (!pdev) { 114 pr_err("%s: Failed to device alloc for dmtimer%d\n", 115 __func__, i); 116 return -ENOMEM; 117 } 118 119 memset(res, 0, 2 * sizeof(struct resource)); 120 res[0].start = base; 121 res[0].end = base + 0x46; 122 res[0].flags = IORESOURCE_MEM; 123 res[1].start = irq; 124 res[1].end = irq; 125 res[1].flags = IORESOURCE_IRQ; 126 ret = platform_device_add_resources(pdev, res, 127 ARRAY_SIZE(res)); 128 if (ret) { 129 dev_err(&pdev->dev, "%s: Failed to add resources.\n", 130 __func__); 131 goto err_free_pdev; 132 } 133 134 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); 135 if (!pdata) { 136 dev_err(&pdev->dev, "%s: Failed to allocate pdata.\n", 137 __func__); 138 ret = -ENOMEM; 139 goto err_free_pdata; 140 } 141 142 pdata->set_timer_src = omap1_dm_timer_set_src; 143 pdata->timer_capability = OMAP_TIMER_ALWON | 144 OMAP_TIMER_NEEDS_RESET; 145 146 ret = platform_device_add_data(pdev, pdata, sizeof(*pdata)); 147 if (ret) { 148 dev_err(&pdev->dev, "%s: Failed to add platform data.\n", 149 __func__); 150 goto err_free_pdata; 151 } 152 153 ret = platform_device_add(pdev); 154 if (ret) { 155 dev_err(&pdev->dev, "%s: Failed to add platform device.\n", 156 __func__); 157 goto err_free_pdata; 158 } 159 160 dev_dbg(&pdev->dev, " Registered.\n"); 161 } 162 163 return 0; 164 165 err_free_pdata: 166 kfree(pdata); 167 168 err_free_pdev: 169 platform_device_unregister(pdev); 170 171 return ret; 172 } 173 arch_initcall(omap1_dm_timer_init); 174