forked from luck/tmp_suning_uos_patched
7bf350b724
While checking the "__devinit" removal patches with checkpatch.pl, I noticed several warnings related to a space between the function name and '(', as well as long lines. I fixed the warnings up in this patch. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
198 lines
5.0 KiB
C
198 lines
5.0 KiB
C
/*
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* drivers/mtd/maps/bfin-async-flash.c
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*
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* Handle the case where flash memory and ethernet mac/phy are
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* mapped onto the same async bank. The BF533-STAMP does this
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* for example. All board-specific configuration goes in your
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* board resources file.
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*
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* Copyright 2000 Nicolas Pitre <nico@fluxnic.net>
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* Copyright 2005-2008 Analog Devices Inc.
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*
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* Enter bugs at http://blackfin.uclinux.org/
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*
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* Licensed under the GPL-2 or later.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/map.h>
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#include <linux/mtd/partitions.h>
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#include <linux/mtd/physmap.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <asm/blackfin.h>
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#include <linux/gpio.h>
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#include <linux/io.h>
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#include <asm/unaligned.h>
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#define pr_devinit(fmt, args...) \
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({ static const char __fmt[] = fmt; printk(__fmt, ## args); })
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#define DRIVER_NAME "bfin-async-flash"
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struct async_state {
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struct mtd_info *mtd;
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struct map_info map;
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int enet_flash_pin;
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uint32_t flash_ambctl0, flash_ambctl1;
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uint32_t save_ambctl0, save_ambctl1;
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unsigned long irq_flags;
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};
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static void switch_to_flash(struct async_state *state)
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{
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local_irq_save(state->irq_flags);
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gpio_set_value(state->enet_flash_pin, 0);
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state->save_ambctl0 = bfin_read_EBIU_AMBCTL0();
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state->save_ambctl1 = bfin_read_EBIU_AMBCTL1();
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bfin_write_EBIU_AMBCTL0(state->flash_ambctl0);
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bfin_write_EBIU_AMBCTL1(state->flash_ambctl1);
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SSYNC();
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}
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static void switch_back(struct async_state *state)
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{
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bfin_write_EBIU_AMBCTL0(state->save_ambctl0);
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bfin_write_EBIU_AMBCTL1(state->save_ambctl1);
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SSYNC();
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gpio_set_value(state->enet_flash_pin, 1);
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local_irq_restore(state->irq_flags);
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}
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static map_word bfin_flash_read(struct map_info *map, unsigned long ofs)
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{
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struct async_state *state = (struct async_state *)map->map_priv_1;
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uint16_t word;
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map_word test;
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switch_to_flash(state);
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word = readw(map->virt + ofs);
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switch_back(state);
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test.x[0] = word;
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return test;
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}
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static void bfin_flash_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
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{
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struct async_state *state = (struct async_state *)map->map_priv_1;
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switch_to_flash(state);
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memcpy(to, map->virt + from, len);
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switch_back(state);
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}
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static void bfin_flash_write(struct map_info *map, map_word d1, unsigned long ofs)
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{
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struct async_state *state = (struct async_state *)map->map_priv_1;
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uint16_t d;
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d = d1.x[0];
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switch_to_flash(state);
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writew(d, map->virt + ofs);
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SSYNC();
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switch_back(state);
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}
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static void bfin_flash_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
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{
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struct async_state *state = (struct async_state *)map->map_priv_1;
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switch_to_flash(state);
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memcpy(map->virt + to, from, len);
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SSYNC();
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switch_back(state);
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}
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static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", NULL };
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static int bfin_flash_probe(struct platform_device *pdev)
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{
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int ret;
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struct physmap_flash_data *pdata = pdev->dev.platform_data;
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struct resource *memory = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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struct resource *flash_ambctl = platform_get_resource(pdev, IORESOURCE_MEM, 1);
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struct async_state *state;
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state = kzalloc(sizeof(*state), GFP_KERNEL);
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if (!state)
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return -ENOMEM;
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state->map.name = DRIVER_NAME;
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state->map.read = bfin_flash_read;
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state->map.copy_from = bfin_flash_copy_from;
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state->map.write = bfin_flash_write;
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state->map.copy_to = bfin_flash_copy_to;
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state->map.bankwidth = pdata->width;
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state->map.size = resource_size(memory);
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state->map.virt = (void __iomem *)memory->start;
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state->map.phys = memory->start;
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state->map.map_priv_1 = (unsigned long)state;
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state->enet_flash_pin = platform_get_irq(pdev, 0);
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state->flash_ambctl0 = flash_ambctl->start;
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state->flash_ambctl1 = flash_ambctl->end;
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if (gpio_request(state->enet_flash_pin, DRIVER_NAME)) {
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pr_devinit(KERN_ERR DRIVER_NAME ": Failed to request gpio %d\n", state->enet_flash_pin);
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kfree(state);
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return -EBUSY;
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}
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gpio_direction_output(state->enet_flash_pin, 1);
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pr_devinit(KERN_NOTICE DRIVER_NAME ": probing %d-bit flash bus\n", state->map.bankwidth * 8);
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state->mtd = do_map_probe(memory->name, &state->map);
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if (!state->mtd) {
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gpio_free(state->enet_flash_pin);
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kfree(state);
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return -ENXIO;
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}
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mtd_device_parse_register(state->mtd, part_probe_types, NULL,
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pdata->parts, pdata->nr_parts);
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platform_set_drvdata(pdev, state);
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return 0;
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}
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static int bfin_flash_remove(struct platform_device *pdev)
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{
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struct async_state *state = platform_get_drvdata(pdev);
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gpio_free(state->enet_flash_pin);
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mtd_device_unregister(state->mtd);
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map_destroy(state->mtd);
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kfree(state);
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return 0;
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}
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static struct platform_driver bfin_flash_driver = {
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.probe = bfin_flash_probe,
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.remove = bfin_flash_remove,
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.driver = {
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.name = DRIVER_NAME,
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},
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};
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module_platform_driver(bfin_flash_driver);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("MTD map driver for Blackfins with flash/ethernet on same async bank");
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