MTD: nand: make au1550nd.c a platform_driver
Transform the au1550nd.c driver into a platform_driver and hook it
up in the PB1550 board (gen_nand works fine on the DB1550, but since
I don't have a PB1550 to test this driver stays for now).
Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
Cc: linux-mtd@lists.infradead.org
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2875/
Patchwork: https://patchwork.linux-mips.org/patch/3160/
Acked-by: Artem Bityutskiy <dedekind1@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/alchemy/devboards/pb1550.c b/arch/mips/alchemy/devboards/pb1550.c
index e4a00a5..b37e7de 100644
--- a/arch/mips/alchemy/devboards/pb1550.c
+++ b/arch/mips/alchemy/devboards/pb1550.c
@@ -24,6 +24,7 @@
#include <linux/platform_device.h>
#include <asm/mach-au1x00/au1000.h>
#include <asm/mach-au1x00/au1xxx_dbdma.h>
+#include <asm/mach-au1x00/au1550nd.h>
#include <asm/mach-au1x00/gpio.h>
#include <asm/mach-db1x00/bcsr.h>
#include "platform.h"
@@ -131,6 +132,67 @@
.resource = au1550_psc2_res,
};
+static struct mtd_partition pb1550_nand_parts[] = {
+ [0] = {
+ .name = "NAND FS 0",
+ .offset = 0,
+ .size = 8 * 1024 * 1024,
+ },
+ [1] = {
+ .name = "NAND FS 1",
+ .offset = MTDPART_OFS_APPEND,
+ .size = MTDPART_SIZ_FULL,
+ },
+};
+
+static struct au1550nd_platdata pb1550_nand_pd = {
+ .parts = pb1550_nand_parts,
+ .num_parts = ARRAY_SIZE(pb1550_nand_parts),
+ .devwidth = 0, /* x8 NAND default, needs fixing up */
+};
+
+static struct resource pb1550_nand_res[] = {
+ [0] = {
+ .start = 0x20000000,
+ .end = 0x20000fff,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct platform_device pb1550_nand_dev = {
+ .name = "au1550-nand",
+ .id = -1,
+ .resource = pb1550_nand_res,
+ .num_resources = ARRAY_SIZE(pb1550_nand_res),
+ .dev = {
+ .platform_data = &pb1550_nand_pd,
+ },
+};
+
+static void __init pb1550_nand_setup(void)
+{
+ int boot_swapboot = (au_readl(MEM_STSTAT) & (0x7 << 1)) |
+ ((bcsr_read(BCSR_STATUS) >> 6) & 0x1);
+
+ switch (boot_swapboot) {
+ case 0:
+ case 2:
+ case 8:
+ case 0xC:
+ case 0xD:
+ /* x16 NAND Flash */
+ pb1550_nand_pd.devwidth = 1;
+ /* fallthrough */
+ case 1:
+ case 9:
+ case 3:
+ case 0xE:
+ case 0xF:
+ /* x8 NAND, already set up */
+ platform_device_register(&pb1550_nand_dev);
+ }
+}
+
static int __init pb1550_dev_init(void)
{
int swapped;
@@ -168,6 +230,10 @@
AU1000_PCMCIA_IO_PHYS_ADDR + 0x008010000 - 1,
AU1550_GPIO201_205_INT, AU1550_GPIO1_INT, 0, 0, 1);
+ /* NAND setup */
+ gpio_direction_input(206); /* GPIO206 high */
+ pb1550_nand_setup();
+
swapped = bcsr_read(BCSR_STATUS) & BCSR_STATUS_PB1550_SWAPBOOT;
db1x_register_norflash(128 * 1024 * 1024, 4, swapped);
platform_device_register(&pb1550_pci_host);