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 a low level function to change the timer 7 * input clock source. 8 * 9 * Copyright (C) 2011 Texas Instruments Incorporated - https://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 #include <linux/soc/ti/omap1-io.h> 30 31 #include <clocksource/timer-ti-dm.h> 32 33 #include "soc.h" 34 35 #define OMAP1610_GPTIMER1_BASE 0xfffb1400 36 #define OMAP1610_GPTIMER2_BASE 0xfffb1c00 37 #define OMAP1610_GPTIMER3_BASE 0xfffb2400 38 #define OMAP1610_GPTIMER4_BASE 0xfffb2c00 39 #define OMAP1610_GPTIMER5_BASE 0xfffb3400 40 #define OMAP1610_GPTIMER6_BASE 0xfffb3c00 41 #define OMAP1610_GPTIMER7_BASE 0xfffb7400 42 #define OMAP1610_GPTIMER8_BASE 0xfffbd400 43 44 #define OMAP1_DM_TIMER_COUNT 8 45 46 static int omap1_dm_timer_set_src(struct platform_device *pdev, 47 int source) 48 { 49 int n = (pdev->id - 1) << 1; 50 u32 l; 51 52 l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n); 53 l |= source << n; 54 omap_writel(l, MOD_CONF_CTRL_1); 55 56 return 0; 57 } 58 59 static int __init omap1_dm_timer_init(void) 60 { 61 int i; 62 int ret; 63 struct dmtimer_platform_data *pdata; 64 struct platform_device *pdev; 65 66 if (!cpu_is_omap16xx()) 67 return 0; 68 69 for (i = 1; i <= OMAP1_DM_TIMER_COUNT; i++) { 70 struct resource res[2]; 71 u32 base, irq; 72 73 switch (i) { 74 case 1: 75 base = OMAP1610_GPTIMER1_BASE; 76 irq = INT_1610_GPTIMER1; 77 break; 78 case 2: 79 base = OMAP1610_GPTIMER2_BASE; 80 irq = INT_1610_GPTIMER2; 81 break; 82 case 3: 83 base = OMAP1610_GPTIMER3_BASE; 84 irq = INT_1610_GPTIMER3; 85 break; 86 case 4: 87 base = OMAP1610_GPTIMER4_BASE; 88 irq = INT_1610_GPTIMER4; 89 break; 90 case 5: 91 base = OMAP1610_GPTIMER5_BASE; 92 irq = INT_1610_GPTIMER5; 93 break; 94 case 6: 95 base = OMAP1610_GPTIMER6_BASE; 96 irq = INT_1610_GPTIMER6; 97 break; 98 case 7: 99 base = OMAP1610_GPTIMER7_BASE; 100 irq = INT_1610_GPTIMER7; 101 break; 102 case 8: 103 base = OMAP1610_GPTIMER8_BASE; 104 irq = INT_1610_GPTIMER8; 105 break; 106 default: 107 /* 108 * not supposed to reach here. 109 * this is to remove warning. 110 */ 111 return -EINVAL; 112 } 113 114 pdev = platform_device_alloc("omap_timer", i); 115 if (!pdev) { 116 pr_err("%s: Failed to device alloc for dmtimer%d\n", 117 __func__, i); 118 return -ENOMEM; 119 } 120 121 memset(res, 0, 2 * sizeof(struct resource)); 122 res[0].start = base; 123 res[0].end = base + 0x46; 124 res[0].flags = IORESOURCE_MEM; 125 res[1].start = irq; 126 res[1].end = irq; 127 res[1].flags = IORESOURCE_IRQ; 128 ret = platform_device_add_resources(pdev, res, 129 ARRAY_SIZE(res)); 130 if (ret) { 131 dev_err(&pdev->dev, "%s: Failed to add resources.\n", 132 __func__); 133 goto err_free_pdev; 134 } 135 136 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); 137 if (!pdata) { 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 | OMAP_TIMER_HAS_DSP_IRQ; 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