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Original file line number | Diff line number | Diff line change |
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/** | ||
* 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> | ||
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#include <mach/irqs.h> | ||
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#include <plat/dmtimer.h> | ||
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#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 | ||
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#define OMAP1_DM_TIMER_COUNT 8 | ||
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static int omap1_dm_timer_set_src(struct platform_device *pdev, | ||
int source) | ||
{ | ||
int n = (pdev->id - 1) << 1; | ||
u32 l; | ||
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l = __raw_readl(MOD_CONF_CTRL_1) & ~(0x03 << n); | ||
l |= source << n; | ||
__raw_writel(l, MOD_CONF_CTRL_1); | ||
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return 0; | ||
} | ||
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int __init omap1_dm_timer_init(void) | ||
{ | ||
int i; | ||
int ret; | ||
struct dmtimer_platform_data *pdata; | ||
struct platform_device *pdev; | ||
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if (!cpu_is_omap16xx()) | ||
return 0; | ||
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for (i = 1; i <= OMAP1_DM_TIMER_COUNT; i++) { | ||
struct resource res[2]; | ||
u32 base, irq; | ||
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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; | ||
} | ||
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pdev = platform_device_alloc("omap_timer", i); | ||
if (!pdev) { | ||
pr_err("%s: Failed to device alloc for dmtimer%d\n", | ||
__func__, i); | ||
return -ENOMEM; | ||
} | ||
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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; | ||
} | ||
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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; | ||
} | ||
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pdata->set_timer_src = omap1_dm_timer_set_src; | ||
pdata->needs_manual_reset = 1; | ||
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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; | ||
} | ||
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ret = platform_device_add(pdev); | ||
if (ret) { | ||
dev_err(&pdev->dev, "%s: Failed to add platform device.\n", | ||
__func__); | ||
goto err_free_pdata; | ||
} | ||
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dev_dbg(&pdev->dev, " Registered.\n"); | ||
} | ||
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return 0; | ||
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err_free_pdata: | ||
kfree(pdata); | ||
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err_free_pdev: | ||
platform_device_unregister(pdev); | ||
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return ret; | ||
} | ||
arch_initcall(omap1_dm_timer_init); |
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