diff options
Diffstat (limited to 'arch/arm/plat-pxa/ssp.c')
| -rw-r--r-- | arch/arm/plat-pxa/ssp.c | 231 |
1 files changed, 0 insertions, 231 deletions
diff --git a/arch/arm/plat-pxa/ssp.c b/arch/arm/plat-pxa/ssp.c deleted file mode 100644 index 563440315acd..000000000000 --- a/arch/arm/plat-pxa/ssp.c +++ /dev/null @@ -1,231 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/arm/mach-pxa/ssp.c - * - * based on linux/arch/arm/mach-sa1100/ssp.c by Russell King - * - * Copyright (C) 2003 Russell King. - * Copyright (C) 2003 Wolfson Microelectronics PLC - * - * PXA2xx SSP driver. This provides the generic core for simple - * IO-based SSP applications and allows easy port setup for DMA access. - * - * Author: Liam Girdwood <liam.girdwood@wolfsonmicro.com> - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/errno.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/mutex.h> -#include <linux/clk.h> -#include <linux/err.h> -#include <linux/platform_device.h> -#include <linux/spi/pxa2xx_spi.h> -#include <linux/io.h> -#include <linux/of.h> -#include <linux/of_device.h> - -#include <asm/irq.h> - -static DEFINE_MUTEX(ssp_lock); -static LIST_HEAD(ssp_list); - -struct ssp_device *pxa_ssp_request(int port, const char *label) -{ - struct ssp_device *ssp = NULL; - - mutex_lock(&ssp_lock); - - list_for_each_entry(ssp, &ssp_list, node) { - if (ssp->port_id == port && ssp->use_count == 0) { - ssp->use_count++; - ssp->label = label; - break; - } - } - - mutex_unlock(&ssp_lock); - - if (&ssp->node == &ssp_list) - return NULL; - - return ssp; -} -EXPORT_SYMBOL(pxa_ssp_request); - -struct ssp_device *pxa_ssp_request_of(const struct device_node *of_node, - const char *label) -{ - struct ssp_device *ssp = NULL; - - mutex_lock(&ssp_lock); - - list_for_each_entry(ssp, &ssp_list, node) { - if (ssp->of_node == of_node && ssp->use_count == 0) { - ssp->use_count++; - ssp->label = label; - break; - } - } - - mutex_unlock(&ssp_lock); - - if (&ssp->node == &ssp_list) - return NULL; - - return ssp; -} -EXPORT_SYMBOL(pxa_ssp_request_of); - -void pxa_ssp_free(struct ssp_device *ssp) -{ - mutex_lock(&ssp_lock); - if (ssp->use_count) { - ssp->use_count--; - ssp->label = NULL; - } else - dev_err(ssp->dev, "device already free\n"); - mutex_unlock(&ssp_lock); -} -EXPORT_SYMBOL(pxa_ssp_free); - -#ifdef CONFIG_OF -static const struct of_device_id pxa_ssp_of_ids[] = { - { .compatible = "mrvl,pxa25x-ssp", .data = (void *) PXA25x_SSP }, - { .compatible = "mvrl,pxa25x-nssp", .data = (void *) PXA25x_NSSP }, - { .compatible = "mrvl,pxa27x-ssp", .data = (void *) PXA27x_SSP }, - { .compatible = "mrvl,pxa3xx-ssp", .data = (void *) PXA3xx_SSP }, - { .compatible = "mvrl,pxa168-ssp", .data = (void *) PXA168_SSP }, - { .compatible = "mrvl,pxa910-ssp", .data = (void *) PXA910_SSP }, - { .compatible = "mrvl,ce4100-ssp", .data = (void *) CE4100_SSP }, - { }, -}; -MODULE_DEVICE_TABLE(of, pxa_ssp_of_ids); -#endif - -static int pxa_ssp_probe(struct platform_device *pdev) -{ - struct resource *res; - struct ssp_device *ssp; - struct device *dev = &pdev->dev; - - ssp = devm_kzalloc(dev, sizeof(struct ssp_device), GFP_KERNEL); - if (ssp == NULL) - return -ENOMEM; - - ssp->dev = dev; - - ssp->clk = devm_clk_get(dev, NULL); - if (IS_ERR(ssp->clk)) - return PTR_ERR(ssp->clk); - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res == NULL) { - dev_err(dev, "no memory resource defined\n"); - return -ENODEV; - } - - res = devm_request_mem_region(dev, res->start, resource_size(res), - pdev->name); - if (res == NULL) { - dev_err(dev, "failed to request memory resource\n"); - return -EBUSY; - } - - ssp->phys_base = res->start; - - ssp->mmio_base = devm_ioremap(dev, res->start, resource_size(res)); - if (ssp->mmio_base == NULL) { - dev_err(dev, "failed to ioremap() registers\n"); - return -ENODEV; - } - - ssp->irq = platform_get_irq(pdev, 0); - if (ssp->irq < 0) { - dev_err(dev, "no IRQ resource defined\n"); - return -ENODEV; - } - - if (dev->of_node) { - const struct of_device_id *id = - of_match_device(of_match_ptr(pxa_ssp_of_ids), dev); - ssp->type = (int) id->data; - } else { - const struct platform_device_id *id = - platform_get_device_id(pdev); - ssp->type = (int) id->driver_data; - - /* PXA2xx/3xx SSP ports starts from 1 and the internal pdev->id - * starts from 0, do a translation here - */ - ssp->port_id = pdev->id + 1; - } - - ssp->use_count = 0; - ssp->of_node = dev->of_node; - - mutex_lock(&ssp_lock); - list_add(&ssp->node, &ssp_list); - mutex_unlock(&ssp_lock); - - platform_set_drvdata(pdev, ssp); - - return 0; -} - -static int pxa_ssp_remove(struct platform_device *pdev) -{ - struct ssp_device *ssp; - - ssp = platform_get_drvdata(pdev); - if (ssp == NULL) - return -ENODEV; - - mutex_lock(&ssp_lock); - list_del(&ssp->node); - mutex_unlock(&ssp_lock); - - return 0; -} - -static const struct platform_device_id ssp_id_table[] = { - { "pxa25x-ssp", PXA25x_SSP }, - { "pxa25x-nssp", PXA25x_NSSP }, - { "pxa27x-ssp", PXA27x_SSP }, - { "pxa3xx-ssp", PXA3xx_SSP }, - { "pxa168-ssp", PXA168_SSP }, - { "pxa910-ssp", PXA910_SSP }, - { }, -}; - -static struct platform_driver pxa_ssp_driver = { - .probe = pxa_ssp_probe, - .remove = pxa_ssp_remove, - .driver = { - .name = "pxa2xx-ssp", - .of_match_table = of_match_ptr(pxa_ssp_of_ids), - }, - .id_table = ssp_id_table, -}; - -static int __init pxa_ssp_init(void) -{ - return platform_driver_register(&pxa_ssp_driver); -} - -static void __exit pxa_ssp_exit(void) -{ - platform_driver_unregister(&pxa_ssp_driver); -} - -arch_initcall(pxa_ssp_init); -module_exit(pxa_ssp_exit); - -MODULE_DESCRIPTION("PXA SSP driver"); -MODULE_AUTHOR("Liam Girdwood"); -MODULE_LICENSE("GPL"); |