From patchwork Mon Dec 29 21:52:07 2008 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [RFC,2/3,MTD] NAND: hooks for ts78xx.c to use ts7xxx.c NAND driver Date: Mon, 29 Dec 2008 11:52:07 -0000 From: Alexander Clouter X-Patchwork-Id: 15992 Message-Id: <20081229215207.GH3381@woodchuck> To: linux-mtd@lists.infradead.org [PATCH RFC] [MTD] NAND: add hooks so TS78xx can use the NAND Add the NAND hooks in the platform code for the ts78xx.c Signed-off-by: Alexander Clouter --- arch/arm/mach-orion5x/ts78xx-fpga.h | 1 + arch/arm/mach-orion5x/ts78xx-setup.c | 115 ++++++++++++++++++++++++++++++++++ 2 files changed, 116 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-orion5x/ts78xx-fpga.h b/arch/arm/mach-orion5x/ts78xx-fpga.h index 247e7ea..44c2b3c 100644 --- a/arch/arm/mach-orion5x/ts78xx-fpga.h +++ b/arch/arm/mach-orion5x/ts78xx-fpga.h @@ -12,6 +12,7 @@ struct fpga_device { struct fpga_devices { /* Technologic Systems */ struct fpga_device ts_rtc; + struct fpga_device ts_nand; }; struct ts78xx_fpga_data { diff --git a/arch/arm/mach-orion5x/ts78xx-setup.c b/arch/arm/mach-orion5x/ts78xx-setup.c index 2d020ac..b0fb96d 100644 --- a/arch/arm/mach-orion5x/ts78xx-setup.c +++ b/arch/arm/mach-orion5x/ts78xx-setup.c @@ -15,6 +15,9 @@ #include #include #include +#include +#include +#include #include #include #include @@ -159,11 +162,118 @@ static void ts78xx_ts_rtc_unload(void) #endif /***************************************************************************** + * NAND Flash + ****************************************************************************/ +#ifdef CONFIG_MTD_NAND_TS7XXX +#define TS_NAND_IOBASE TS78XX_FPGA_REGS_PHYS_BASE +#define TS_NAND_SIZE SZ_4K +#define TS_NAND_CTRL_OFFSET 0x800 +#define TS_NAND_DATA_OFFSET 0x804 + +static struct mtd_partition ts78xx_ts_nand_parts512[] = { + { + .name = "mbr", + .offset = 0, + .size = SZ_128K, + .mask_flags = MTD_WRITEABLE, + }, { + .name = "kernel", + .offset = MTDPART_OFS_APPEND, + .size = SZ_4M, + }, { + .name = "initrd", + .offset = MTDPART_OFS_APPEND, + .size = SZ_4M, + }, { + .name = "rootfs", + .offset = MTDPART_OFS_APPEND, + .size = MTDPART_SIZ_FULL, + } +}; + +static struct ts7xxx_nand_data ts78xx_ts_nand_data = { + .partitions = NULL, + .nr_partitions = 0, + + .ioports = { + .ctrl = { + .res = 0, + .offset = TS_NAND_CTRL_OFFSET, + }, + .data = { + .res = 0, + .offset = TS_NAND_DATA_OFFSET, + }, + + .busy = { + .res = 0, + .offset = TS_NAND_CTRL_OFFSET, + }, + }, +}; + +static struct resource ts78xx_ts_nand_flash_resource[] = { + { + .flags = IORESOURCE_MEM, + .start = TS_NAND_IOBASE, + .end = TS_NAND_IOBASE + TS_NAND_SIZE - 1, + }, +}; + +static struct ts7xxx_nand_data *ts78xx_ts_nand(unsigned int size) +{ + /* + * currently only the TS-7800 is out there with a 512MiB NAND + */ + if (size == 512 * SZ_1M) { + ts78xx_ts_nand_data.partitions = ts78xx_ts_nand_parts512; + ts78xx_ts_nand_data.nr_partitions + = ARRAY_SIZE(ts78xx_ts_nand_parts512); + } + + return &ts78xx_ts_nand_data; +}; + +static struct platform_device ts78xx_ts_nand_device = { + .name = "ts7xxx_nand", + .id = -1, + .dev = { + .platform_data = &ts78xx_ts_nand, + }, + .num_resources = ARRAY_SIZE(ts78xx_ts_nand_flash_resource), + .resource = ts78xx_ts_nand_flash_resource, +}; + +static void ts78xx_ts_nand_load(void) +{ + if (ts78xx_fpga.supports.ts_nand.init == 0) { + ts78xx_fpga.supports.ts_nand.init = 1; + platform_device_register(&ts78xx_ts_nand_device); + } else + platform_device_add(&ts78xx_ts_nand_device); +}; + +static void ts78xx_ts_nand_unload(void) +{ + platform_device_del(&ts78xx_ts_nand_device); +} +#else +static void ts78xx_ts_nand_load(void) +{ +} + +static void ts78xx_ts_nand_unload(void) +{ +} +#endif + +/***************************************************************************** * FPGA 'hotplug' support code ****************************************************************************/ static void ts78xx_fpga_devices_zero_init(void) { ts78xx_fpga.supports.ts_rtc.init = 0; + ts78xx_fpga.supports.ts_nand.init = 0; } static void ts78xx_fpga_supports(void) @@ -172,6 +282,7 @@ static void ts78xx_fpga_supports(void) switch (ts78xx_fpga.id) { case TS7800_REV_B: ts78xx_fpga.supports.ts_rtc.present = 1; + ts78xx_fpga.supports.ts_nand.present = 1; break; } } @@ -186,6 +297,8 @@ static int ts78xx_fpga_load_devices(void) printk(KERN_INFO "TS-78xx RTC not detected or enabled\n"); ret |= tmp; } + if (ts78xx_fpga.supports.ts_nand.present == 1) + ts78xx_ts_nand_load(); return ret; } @@ -196,6 +309,8 @@ static int ts78xx_fpga_unload_devices(void) if (ts78xx_fpga.supports.ts_rtc.present == 1) ts78xx_ts_rtc_unload(); + if (ts78xx_fpga.supports.ts_nand.present == 1) + ts78xx_ts_nand_unload(); return ret; }