diff options
Diffstat (limited to 'arch/arm/common/sa1111.c')
| -rw-r--r-- | arch/arm/common/sa1111.c | 131 |
1 files changed, 31 insertions, 100 deletions
diff --git a/arch/arm/common/sa1111.c b/arch/arm/common/sa1111.c index 947ef7981d92..1fbd7363cf11 100644 --- a/arch/arm/common/sa1111.c +++ b/arch/arm/common/sa1111.c @@ -22,17 +22,20 @@ #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/spinlock.h> -#include <linux/dma-mapping.h> +#include <linux/dma-map-ops.h> #include <linux/clk.h> #include <linux/io.h> -#include <mach/hardware.h> #include <asm/mach/irq.h> #include <asm/mach-types.h> #include <linux/sizes.h> #include <asm/hardware/sa1111.h> +#ifdef CONFIG_ARCH_SA1100 +#include <mach/hardware.h> +#endif + /* SA1111 IRQs */ #define IRQ_GPAIN0 (0) #define IRQ_GPAIN1 (1) @@ -196,14 +199,6 @@ static int sa1111_map_irq(struct sa1111 *sachip, irq_hw_number_t hwirq) return irq_create_mapping(sachip->irqdomain, hwirq); } -static void sa1111_handle_irqdomain(struct irq_domain *irqdomain, int irq) -{ - struct irq_desc *d = irq_to_desc(irq_linear_revmap(irqdomain, irq)); - - if (d) - generic_handle_irq_desc(d); -} - /* * SA1111 interrupt support. Since clearing an IRQ while there are * active IRQs causes the interrupt output to pulse, the upper levels @@ -234,11 +229,11 @@ static void sa1111_irq_handler(struct irq_desc *desc) for (i = 0; stat0; i++, stat0 >>= 1) if (stat0 & 1) - sa1111_handle_irqdomain(irqdomain, i); + generic_handle_domain_irq(irqdomain, i); for (i = 32; stat1; i++, stat1 >>= 1) if (stat1 & 1) - sa1111_handle_irqdomain(irqdomain, i); + generic_handle_domain_irq(irqdomain, i); /* For level-based interrupts */ desc->irq_data.chip->irq_unmask(&desc->irq_data); @@ -302,10 +297,13 @@ static int sa1111_retrigger_irq(struct irq_data *d) break; } - if (i == 8) + if (i == 8) { pr_err("Danger Will Robinson: failed to re-trigger IRQ%d\n", d->irq); - return i == 8 ? -1 : 0; + return 0; + } + + return 1; } static int sa1111_type_irq(struct irq_data *d, unsigned int flags) @@ -697,7 +695,7 @@ static u32 sa1111_dma_mask[] = { /* * Configure the SA1111 shared memory controller. */ -void +static void sa1111_configure_smc(struct sa1111 *sachip, int sdram, unsigned int drac, unsigned int cas_latency) { @@ -787,19 +785,6 @@ sa1111_init_one_child(struct sa1111 *sachip, struct resource *parent, return ret; } -/** - * sa1111_probe - probe for a single SA1111 chip. - * @phys_addr: physical address of device. - * - * Probe for a SA1111 chip. This must be called - * before any other SA1111-specific code. - * - * Returns: - * %-ENODEV device not found. - * %-EBUSY physical address already marked in-use. - * %-EINVAL no platform data passed - * %0 successful. - */ static int __sa1111_probe(struct device *me, struct resource *mem, int irq) { struct sa1111_platform_data *pd = me->platform_data; @@ -1110,6 +1095,20 @@ static int sa1111_resume_noirq(struct device *dev) #define sa1111_resume_noirq NULL #endif +/** + * sa1111_probe - probe for a single SA1111 chip. + * @pdev: platform device. + * + * Probe for a SA1111 chip. This must be called + * before any other SA1111-specific code. + * + * Returns: + * * %-ENODEV - device not found. + * * %-ENOMEM - memory allocation failure. + * * %-EBUSY - physical address already marked in-use. + * * %-EINVAL - no platform data passed + * * %0 - successful. + */ static int sa1111_probe(struct platform_device *pdev) { struct resource *mem; @@ -1125,7 +1124,7 @@ static int sa1111_probe(struct platform_device *pdev) return __sa1111_probe(&pdev->dev, mem, irq); } -static int sa1111_remove(struct platform_device *pdev) +static void sa1111_remove(struct platform_device *pdev) { struct sa1111 *sachip = platform_get_drvdata(pdev); @@ -1137,8 +1136,6 @@ static int sa1111_remove(struct platform_device *pdev) __sa1111_remove(sachip); platform_set_drvdata(pdev, NULL); } - - return 0; } static struct dev_pm_ops sa1111_pm_ops = { @@ -1157,7 +1154,7 @@ static struct dev_pm_ops sa1111_pm_ops = { */ static struct platform_driver sa1111_device_driver = { .probe = sa1111_probe, - .remove = sa1111_remove, + .remove_new = sa1111_remove, .driver = { .name = "sa1111", .pm = &sa1111_pm_ops, @@ -1361,15 +1358,13 @@ static int sa1111_bus_probe(struct device *dev) return ret; } -static int sa1111_bus_remove(struct device *dev) +static void sa1111_bus_remove(struct device *dev) { struct sa1111_dev *sadev = to_sa1111_device(dev); struct sa1111_driver *drv = SA1111_DRV(dev->driver); - int ret = 0; if (drv->remove) - ret = drv->remove(sadev); - return ret; + drv->remove(sadev); } struct bus_type sa1111_bus_type = { @@ -1393,70 +1388,9 @@ void sa1111_driver_unregister(struct sa1111_driver *driver) } EXPORT_SYMBOL(sa1111_driver_unregister); -#ifdef CONFIG_DMABOUNCE -/* - * According to the "Intel StrongARM SA-1111 Microprocessor Companion - * Chip Specification Update" (June 2000), erratum #7, there is a - * significant bug in the SA1111 SDRAM shared memory controller. If - * an access to a region of memory above 1MB relative to the bank base, - * it is important that address bit 10 _NOT_ be asserted. Depending - * on the configuration of the RAM, bit 10 may correspond to one - * of several different (processor-relative) address bits. - * - * This routine only identifies whether or not a given DMA address - * is susceptible to the bug. - * - * This should only get called for sa1111_device types due to the - * way we configure our device dma_masks. - */ -static int sa1111_needs_bounce(struct device *dev, dma_addr_t addr, size_t size) -{ - /* - * Section 4.6 of the "Intel StrongARM SA-1111 Development Module - * User's Guide" mentions that jumpers R51 and R52 control the - * target of SA-1111 DMA (either SDRAM bank 0 on Assabet, or - * SDRAM bank 1 on Neponset). The default configuration selects - * Assabet, so any address in bank 1 is necessarily invalid. - */ - return (machine_is_assabet() || machine_is_pfs168()) && - (addr >= 0xc8000000 || (addr + size) >= 0xc8000000); -} - -static int sa1111_notifier_call(struct notifier_block *n, unsigned long action, - void *data) -{ - struct sa1111_dev *dev = to_sa1111_device(data); - - switch (action) { - case BUS_NOTIFY_ADD_DEVICE: - if (dev->dev.dma_mask && dev->dma_mask < 0xffffffffUL) { - int ret = dmabounce_register_dev(&dev->dev, 1024, 4096, - sa1111_needs_bounce); - if (ret) - dev_err(&dev->dev, "failed to register with dmabounce: %d\n", ret); - } - break; - - case BUS_NOTIFY_DEL_DEVICE: - if (dev->dev.dma_mask && dev->dma_mask < 0xffffffffUL) - dmabounce_unregister_dev(&dev->dev); - break; - } - return NOTIFY_OK; -} - -static struct notifier_block sa1111_bus_notifier = { - .notifier_call = sa1111_notifier_call, -}; -#endif - static int __init sa1111_init(void) { int ret = bus_register(&sa1111_bus_type); -#ifdef CONFIG_DMABOUNCE - if (ret == 0) - bus_register_notifier(&sa1111_bus_type, &sa1111_bus_notifier); -#endif if (ret == 0) platform_driver_register(&sa1111_device_driver); return ret; @@ -1465,9 +1399,6 @@ static int __init sa1111_init(void) static void __exit sa1111_exit(void) { platform_driver_unregister(&sa1111_device_driver); -#ifdef CONFIG_DMABOUNCE - bus_unregister_notifier(&sa1111_bus_type, &sa1111_bus_notifier); -#endif bus_unregister(&sa1111_bus_type); } |