From: Thara Gopinath <thara@xxxxxx> Convert OMAP1 dmtimers into a platform devices and then registers with device model framework so that it can be bound to corresponding driver. Signed-off-by: Thara Gopinath <thara@xxxxxx> Signed-off-by: Tarun Kanti DebBarma <tarun.kanti@xxxxxx> Acked-by: Cousson, Benoit <b-cousson@xxxxxx> --- arch/arm/mach-omap1/Makefile | 2 +- arch/arm/mach-omap1/dmtimer.c | 214 +++++++++++++++++++++++++++++ arch/arm/mach-omap1/timer32k.c | 4 - arch/arm/plat-omap/dmtimer.c | 64 +-------- arch/arm/plat-omap/include/plat/dmtimer.h | 24 +++- 5 files changed, 246 insertions(+), 62 deletions(-) create mode 100644 arch/arm/mach-omap1/dmtimer.c diff --git a/arch/arm/mach-omap1/Makefile b/arch/arm/mach-omap1/Makefile index af98117..a0ae35f 100644 --- a/arch/arm/mach-omap1/Makefile +++ b/arch/arm/mach-omap1/Makefile @@ -4,7 +4,7 @@ # Common support obj-y := io.o id.o sram.o time.o irq.o mux.o flash.o serial.o devices.o dma.o -obj-y += clock.o clock_data.o opp_data.o reset.o +obj-y += clock.o clock_data.o opp_data.o reset.o dmtimer.o obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o diff --git a/arch/arm/mach-omap1/dmtimer.c b/arch/arm/mach-omap1/dmtimer.c new file mode 100644 index 0000000..d1e17fe --- /dev/null +++ b/arch/arm/mach-omap1/dmtimer.c @@ -0,0 +1,214 @@ +/** + * 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) 2010 Texas Instruments Incorporated - http://www.ti.com/ + * Tarun Kanti DebBarma <tarun.kanti@xxxxxx> + * Thara Gopinath <thara@xxxxxx> + * + * 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 + +#define OMAP_TIMER_OCP_CFG_REG 0x10 +#define OMAP_TIMER_SYS_STAT_REG 0x14 +#define OMAP_TIMER_IF_CTRL_REG 0x40 + +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 void omap1_dm_timer_wait_for_reset(struct omap_dm_timer *timer) +{ + int c; + struct dmtimer_platform_data *pdata = timer->pdev->dev.platform_data; + + c = 0; + while (!(pdata->dm_timer_read_reg(timer, OMAP_TIMER_SYS_STAT_REG) & 1)) { + c++; + if (c > 100000) { + printk(KERN_ERR "Timer failed to reset.\n"); + return; + } + } +} + +static void omap1_dm_timer_reset(struct omap_dm_timer *timer) +{ + u32 l; + struct dmtimer_platform_data *pdata = timer->pdev->dev.platform_data; + + if (timer->pdev->id != 1) { + pdata->dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG, 0x06); + omap1_dm_timer_wait_for_reset(timer); + } + + l = pdata->dm_timer_read_reg(timer, OMAP_TIMER_OCP_CFG_REG); + l |= 0x02 << 3; /* Set to smart-idle mode */ + l |= 0x2 << 8; /* Set clock activity to perserve f-clock on idle */ + pdata->dm_timer_write_reg(timer, OMAP_TIMER_OCP_CFG_REG, l); +} + +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->dm_timer_reset = omap1_dm_timer_reset; + pdata->set_timer_src = omap1_dm_timer_set_src; + + pdata->is_early_init = 1; + pdata->is_omap16xx = 1; + pdata->timer_ip_type = OMAP_TIMER_IP_VERSION_1; + + pdata->intr_offset = 0; + pdata->func_offset = 0; + + 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); diff --git a/arch/arm/mach-omap1/timer32k.c b/arch/arm/mach-omap1/timer32k.c index 13d7b8f..dc4a8fd 100644 --- a/arch/arm/mach-omap1/timer32k.c +++ b/arch/arm/mach-omap1/timer32k.c @@ -53,7 +53,6 @@ #include <asm/mach/irq.h> #include <asm/mach/time.h> #include <plat/common.h> -#include <plat/dmtimer.h> /* * --------------------------------------------------------------------------- @@ -184,9 +183,6 @@ bool __init omap_32k_timer_init(void) { omap_init_clocksource_32k(); -#ifdef CONFIG_OMAP_DM_TIMER - omap_dm_timer_init(); -#endif omap_init_32k_timer(); return true; diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c index 1d706cf..1bfaf09 100644 --- a/arch/arm/plat-omap/dmtimer.c +++ b/arch/arm/plat-omap/dmtimer.c @@ -3,6 +3,12 @@ * * OMAP Dual-Mode Timers * + * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/ + * Tarun Kanti DebBarma <tarun.kanti@xxxxxx> + * Thara Gopinath <thara@xxxxxx> + * + * dmtimer adaptation to platform_driver. + * * Copyright (C) 2005 Nokia Corporation * OMAP2 support by Juha Yrjola * API improvements and OMAP2 clock framework support by Timo Teras @@ -150,39 +156,8 @@ #define OMAP_TIMER_TICK_INT_MASK_COUNT_REG \ (_OMAP_TIMER_TICK_INT_MASK_COUNT_OFFSET | (WP_TOWR << WPSHIFT)) -struct omap_dm_timer { - unsigned long phys_base; - int irq; -#ifdef CONFIG_ARCH_OMAP2PLUS - struct clk *iclk, *fclk; -#endif - void __iomem *io_base; - unsigned reserved:1; - unsigned enabled:1; - unsigned posted:1; -}; - static int dm_timer_count; -#ifdef CONFIG_ARCH_OMAP1 -static struct omap_dm_timer omap1_dm_timers[] = { - { .phys_base = 0xfffb1400, .irq = INT_1610_GPTIMER1 }, - { .phys_base = 0xfffb1c00, .irq = INT_1610_GPTIMER2 }, - { .phys_base = 0xfffb2400, .irq = INT_1610_GPTIMER3 }, - { .phys_base = 0xfffb2c00, .irq = INT_1610_GPTIMER4 }, - { .phys_base = 0xfffb3400, .irq = INT_1610_GPTIMER5 }, - { .phys_base = 0xfffb3c00, .irq = INT_1610_GPTIMER6 }, - { .phys_base = 0xfffb7400, .irq = INT_1610_GPTIMER7 }, - { .phys_base = 0xfffbd400, .irq = INT_1610_GPTIMER8 }, -}; - -static const int omap1_dm_timer_count = ARRAY_SIZE(omap1_dm_timers); - -#else -#define omap1_dm_timers NULL -#define omap1_dm_timer_count 0 -#endif /* CONFIG_ARCH_OMAP1 */ - #ifdef CONFIG_ARCH_OMAP2 static struct omap_dm_timer omap2_dm_timers[] = { { .phys_base = 0x48028000, .irq = INT_24XX_GPTIMER1 }, @@ -549,23 +524,6 @@ void omap_dm_timer_stop(struct omap_dm_timer *timer) } EXPORT_SYMBOL_GPL(omap_dm_timer_stop); -#ifdef CONFIG_ARCH_OMAP1 - -int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source) -{ - int n = (timer - dm_timers) << 1; - u32 l; - - l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n); - l |= source << n; - omap_writel(l, MOD_CONF_CTRL_1); - - return 0; -} -EXPORT_SYMBOL_GPL(omap_dm_timer_set_source); - -#else - int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source) { int ret = -EINVAL; @@ -587,8 +545,6 @@ int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source) } EXPORT_SYMBOL_GPL(omap_dm_timer_set_source); -#endif - void omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload, unsigned int load) { @@ -738,16 +694,12 @@ int __init omap_dm_timer_init(void) struct omap_dm_timer *timer; int i, map_size = SZ_8K; /* Module 4KB + L4 4KB except on omap1 */ - if (!(cpu_is_omap16xx() || cpu_class_is_omap2())) + if (!cpu_class_is_omap2()) return -ENODEV; spin_lock_init(&dm_timer_lock); - if (cpu_class_is_omap1()) { - dm_timers = omap1_dm_timers; - dm_timer_count = omap1_dm_timer_count; - map_size = SZ_2K; - } else if (cpu_is_omap24xx()) { + if (cpu_is_omap24xx()) { dm_timers = omap2_dm_timers; dm_timer_count = omap2_dm_timer_count; dm_source_names = omap2_dm_source_names; diff --git a/arch/arm/plat-omap/include/plat/dmtimer.h b/arch/arm/plat-omap/include/plat/dmtimer.h index 05a967e..4bfbfcc 100644 --- a/arch/arm/plat-omap/include/plat/dmtimer.h +++ b/arch/arm/plat-omap/include/plat/dmtimer.h @@ -57,11 +57,33 @@ #define OMAP_TIMER_IP_VERSION_1 0x1 #define OMAP_TIMER_IP_VERSION_2 0x2 -struct omap_dm_timer; +struct omap_dm_timer { + unsigned long phys_base; + int irq; + struct clk *iclk, *fclk; + void __iomem *io_base; + unsigned reserved:1; + unsigned enabled:1; + unsigned posted:1; + struct platform_device *pdev; +}; + extern struct omap_dm_timer *gptimer_wakeup; extern struct sys_timer omap_timer; struct clk; +struct dmtimer_platform_data { + int (*set_timer_src)(struct platform_device *pdev, int source); + void (*dm_timer_reset)(struct omap_dm_timer *); + u32 (*dm_timer_read_reg)(struct omap_dm_timer *, u32); + void (*dm_timer_write_reg)(struct omap_dm_timer *, u32, u32); + int timer_ip_type; + u8 func_offset; + u8 intr_offset; + u32 is_early_init:1; + u32 is_omap16xx:1; +}; + int omap_dm_timer_init(void); struct omap_dm_timer *omap_dm_timer_request(void); -- 1.6.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
