mtd: autcpu12-nvram: Convert driver to platform_device
Because we can have a single kernel to support multiple machines, we need to make loading specific drivers for the target platform only. For this, driver is converted to the platform driver. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Alexander Shiyan
David Woodhouse
parent
d1f55c680e
commit
ce55754c4f
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@ -23,6 +23,8 @@
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/io.h>
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#include <linux/ioport.h>
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#include <linux/platform_device.h>
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#include <mach/hardware.h>
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#include <asm/sizes.h>
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@ -62,9 +64,26 @@ void __init autcpu12_map_io(void)
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iotable_init(autcpu12_io_desc, ARRAY_SIZE(autcpu12_io_desc));
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}
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static struct resource autcpu12_nvram_resource[] __initdata = {
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DEFINE_RES_MEM_NAMED(AUTCPU12_PHYS_NVRAM, SZ_128K, "SRAM"),
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};
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static struct platform_device autcpu12_nvram_pdev __initdata = {
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.name = "autcpu12_nvram",
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.id = -1,
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.resource = autcpu12_nvram_resource,
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.num_resources = ARRAY_SIZE(autcpu12_nvram_resource),
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};
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static void __init autcpu12_init(void)
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{
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platform_device_register(&autcpu12_nvram_pdev);
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}
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MACHINE_START(AUTCPU12, "autronix autcpu12")
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/* Maintainer: Thomas Gleixner */
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.atag_offset = 0x20000,
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.init_machine = autcpu12_init,
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.map_io = autcpu12_map_io,
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.init_irq = clps711x_init_irq,
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.timer = &clps711x_timer,
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@ -373,7 +373,7 @@ config MTD_FORTUNET
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have such a board, say 'Y'.
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config MTD_AUTCPU12
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tristate "NV-RAM mapping AUTCPU12 board"
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bool "NV-RAM mapping AUTCPU12 board"
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depends on ARCH_AUTCPU12
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help
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This enables access to the NV-RAM on autronix autcpu12 board.
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@ -15,44 +15,57 @@
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/sizes.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/ioport.h>
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#include <linux/init.h>
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#include <asm/io.h>
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#include <asm/sizes.h>
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#include <mach/hardware.h>
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#include <mach/autcpu12.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/platform_device.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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static struct mtd_info *sram_mtd;
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struct map_info autcpu12_sram_map = {
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.name = "SRAM",
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.size = 32768,
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.bankwidth = 4,
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.phys = 0x12000000,
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struct autcpu12_nvram_priv {
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struct mtd_info *mtd;
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struct map_info map;
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};
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static int __init init_autcpu12_sram (void)
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static int __devinit autcpu12_nvram_probe(struct platform_device *pdev)
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{
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map_word tmp, save0, save1;
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struct resource *res;
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struct autcpu12_nvram_priv *priv;
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int err;
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autcpu12_sram_map.virt = ioremap(0x12000000, SZ_128K);
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if (!autcpu12_sram_map.virt) {
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printk("Failed to ioremap autcpu12 NV-RAM space\n");
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err = -EIO;
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priv = devm_kzalloc(&pdev->dev,
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sizeof(struct autcpu12_nvram_priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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platform_set_drvdata(pdev, priv);
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(&pdev->dev, "failed to get memory resource\n");
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err = -ENOENT;
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goto out;
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}
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simple_map_init(&autcpu12_sram_map);
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priv->map.bankwidth = 4;
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priv->map.phys = res->start;
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priv->map.size = resource_size(res);
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priv->map.virt = devm_request_and_ioremap(&pdev->dev, res);
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strcpy((char *)priv->map.name, res->name);
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if (!priv->map.virt) {
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dev_err(&pdev->dev, "failed to remap mem resource\n");
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err = -EBUSY;
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goto out;
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}
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simple_map_init(&priv->map);
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/*
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* Check for 32K/128K
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@ -62,67 +75,66 @@ static int __init init_autcpu12_sram (void)
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* Read and check result on ofs 0x0
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* Restore contents
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*/
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save0 = map_read(&autcpu12_sram_map, 0);
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save1 = map_read(&autcpu12_sram_map, 0x10000);
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save0 = map_read(&priv->map, 0);
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save1 = map_read(&priv->map, 0x10000);
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tmp.x[0] = ~save0.x[0];
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map_write(&autcpu12_sram_map, tmp, 0x10000);
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/* if we find this pattern on 0x0, we have 32K size
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* restore contents and exit
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*/
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tmp = map_read(&autcpu12_sram_map, 0);
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if (!map_word_equal(&autcpu12_sram_map, tmp, save0)) {
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map_write(&autcpu12_sram_map, save0, 0x0);
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goto map;
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}
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/* We have a 128K found, restore 0x10000 and set size
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* to 128K
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*/
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map_write(&autcpu12_sram_map, save1, 0x10000);
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autcpu12_sram_map.size = SZ_128K;
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map_write(&priv->map, tmp, 0x10000);
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tmp = map_read(&priv->map, 0);
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/* if we find this pattern on 0x0, we have 32K size */
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if (!map_word_equal(&priv->map, tmp, save0)) {
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map_write(&priv->map, save0, 0x0);
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priv->map.size = SZ_32K;
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} else
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map_write(&priv->map, save1, 0x10000);
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map:
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sram_mtd = do_map_probe("map_ram", &autcpu12_sram_map);
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if (!sram_mtd) {
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printk("NV-RAM probe failed\n");
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priv->mtd = do_map_probe("map_ram", &priv->map);
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if (!priv->mtd) {
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dev_err(&pdev->dev, "probing failed\n");
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err = -ENXIO;
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goto out_ioremap;
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goto out;
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}
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sram_mtd->owner = THIS_MODULE;
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sram_mtd->erasesize = 16;
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if (mtd_device_register(sram_mtd, NULL, 0)) {
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printk("NV-RAM device addition failed\n");
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err = -ENOMEM;
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goto out_probe;
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priv->mtd->owner = THIS_MODULE;
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priv->mtd->erasesize = 16;
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priv->mtd->dev.parent = &pdev->dev;
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if (!mtd_device_register(priv->mtd, NULL, 0)) {
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dev_info(&pdev->dev,
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"NV-RAM device size %ldKiB registered on AUTCPU12\n",
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priv->map.size / SZ_1K);
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return 0;
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}
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printk("NV-RAM device size %ldKiB registered on AUTCPU12\n",autcpu12_sram_map.size/SZ_1K);
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map_destroy(priv->mtd);
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dev_err(&pdev->dev, "NV-RAM device addition failed\n");
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err = -ENOMEM;
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return 0;
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out_probe:
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map_destroy(sram_mtd);
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sram_mtd = 0;
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out_ioremap:
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iounmap((void *)autcpu12_sram_map.virt);
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out:
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devm_kfree(&pdev->dev, priv);
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return err;
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}
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static void __exit cleanup_autcpu12_maps(void)
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static int __devexit autcpu12_nvram_remove(struct platform_device *pdev)
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{
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if (sram_mtd) {
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mtd_device_unregister(sram_mtd);
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map_destroy(sram_mtd);
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iounmap((void *)autcpu12_sram_map.virt);
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}
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struct autcpu12_nvram_priv *priv = platform_get_drvdata(pdev);
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mtd_device_unregister(priv->mtd);
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map_destroy(priv->mtd);
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devm_kfree(&pdev->dev, priv);
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return 0;
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}
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module_init(init_autcpu12_sram);
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module_exit(cleanup_autcpu12_maps);
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static struct platform_driver autcpu12_nvram_driver = {
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.driver = {
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.name = "autcpu12_nvram",
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.owner = THIS_MODULE,
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},
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.probe = autcpu12_nvram_probe,
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.remove = __devexit_p(autcpu12_nvram_remove),
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};
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module_platform_driver(autcpu12_nvram_driver);
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MODULE_AUTHOR("Thomas Gleixner");
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MODULE_DESCRIPTION("autcpu12 NV-RAM map driver");
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MODULE_DESCRIPTION("autcpu12 NVRAM map driver");
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MODULE_LICENSE("GPL");
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