diff options
author | Alexander Clouter <alex@digriz.org.uk> | 2009-05-03 23:57:48 +0400 |
---|---|---|
committer | Nicolas Pitre <nico@cam.org> | 2009-06-03 23:29:40 +0400 |
commit | a914d4309c4cf6e7c4d0dbce4822dcad38a7cf27 (patch) | |
tree | 85eebd36c7fa8180b3e20a6414693e10d18a2afd | |
parent | 9fa7eb283c5cdc2b0f4a8cfe6387ed82e5e9a3d3 (diff) | |
download | linux-a914d4309c4cf6e7c4d0dbce4822dcad38a7cf27.tar.xz |
[ARM] orion: add hwrng timeriomem hook to TS-78xx
Add hook so that the HW RNG source on the TS-78xx is available.
Signed-off-by: Alexander Clouter <alex@digriz.org.uk>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
-rw-r--r-- | arch/arm/configs/orion5x_defconfig | 3 | ||||
-rw-r--r-- | arch/arm/mach-orion5x/ts78xx-fpga.h | 1 | ||||
-rw-r--r-- | arch/arm/mach-orion5x/ts78xx-setup.c | 58 |
3 files changed, 61 insertions, 1 deletions
diff --git a/arch/arm/configs/orion5x_defconfig b/arch/arm/configs/orion5x_defconfig index 5b98f7645119..9e2385293ecb 100644 --- a/arch/arm/configs/orion5x_defconfig +++ b/arch/arm/configs/orion5x_defconfig @@ -903,7 +903,8 @@ CONFIG_UNIX98_PTYS=y CONFIG_LEGACY_PTYS=y CONFIG_LEGACY_PTY_COUNT=16 # CONFIG_IPMI_HANDLER is not set -# CONFIG_HW_RANDOM is not set +CONFIG_HW_RANDOM=m +CONFIG_HW_RANDOM_TIMERIOMEM=m # CONFIG_R3964 is not set # CONFIG_APPLICOM is not set # CONFIG_RAW_DRIVER is not set diff --git a/arch/arm/mach-orion5x/ts78xx-fpga.h b/arch/arm/mach-orion5x/ts78xx-fpga.h index 0f9cdf458952..37b3d4875291 100644 --- a/arch/arm/mach-orion5x/ts78xx-fpga.h +++ b/arch/arm/mach-orion5x/ts78xx-fpga.h @@ -25,6 +25,7 @@ struct fpga_devices { /* Technologic Systems */ struct fpga_device ts_rtc; struct fpga_device ts_nand; + struct fpga_device ts_rng; }; struct ts78xx_fpga_data { diff --git a/arch/arm/mach-orion5x/ts78xx-setup.c b/arch/arm/mach-orion5x/ts78xx-setup.c index 9a6b397f972d..5041d1bc26b1 100644 --- a/arch/arm/mach-orion5x/ts78xx-setup.c +++ b/arch/arm/mach-orion5x/ts78xx-setup.c @@ -17,6 +17,7 @@ #include <linux/m48t86.h> #include <linux/mtd/nand.h> #include <linux/mtd/partitions.h> +#include <linux/timeriomem-rng.h> #include <asm/mach-types.h> #include <asm/mach/arch.h> #include <asm/mach/map.h> @@ -270,12 +271,57 @@ static void ts78xx_ts_nand_unload(void) } /***************************************************************************** + * HW RNG + ****************************************************************************/ +#define TS_RNG_DATA (TS78XX_FPGA_REGS_PHYS_BASE | 0x044) + +static struct resource ts78xx_ts_rng_resource = { + .flags = IORESOURCE_MEM, + .start = TS_RNG_DATA, + .end = TS_RNG_DATA + 4 - 1, +}; + +static struct timeriomem_rng_data ts78xx_ts_rng_data = { + .period = 1000000, /* one second */ +}; + +static struct platform_device ts78xx_ts_rng_device = { + .name = "timeriomem_rng", + .id = -1, + .dev = { + .platform_data = &ts78xx_ts_rng_data, + }, + .resource = &ts78xx_ts_rng_resource, + .num_resources = 1, +}; + +static int ts78xx_ts_rng_load(void) +{ + int rc; + + if (ts78xx_fpga.supports.ts_rng.init == 0) { + rc = platform_device_register(&ts78xx_ts_rng_device); + if (!rc) + ts78xx_fpga.supports.ts_rng.init = 1; + } else + rc = platform_device_add(&ts78xx_ts_rng_device); + + return rc; +}; + +static void ts78xx_ts_rng_unload(void) +{ + platform_device_del(&ts78xx_ts_rng_device); +} + +/***************************************************************************** * 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; + ts78xx_fpga.supports.ts_rng.init = 0; } static void ts78xx_fpga_supports(void) @@ -289,10 +335,12 @@ static void ts78xx_fpga_supports(void) case TS7800_REV_5: ts78xx_fpga.supports.ts_rtc.present = 1; ts78xx_fpga.supports.ts_nand.present = 1; + ts78xx_fpga.supports.ts_rng.present = 1; break; default: ts78xx_fpga.supports.ts_rtc.present = 0; ts78xx_fpga.supports.ts_nand.present = 0; + ts78xx_fpga.supports.ts_rng.present = 0; } } @@ -316,6 +364,14 @@ static int ts78xx_fpga_load_devices(void) } ret |= tmp; } + if (ts78xx_fpga.supports.ts_rng.present == 1) { + tmp = ts78xx_ts_rng_load(); + if (tmp) { + printk(KERN_INFO "TS-78xx: RNG not registered\n"); + ts78xx_fpga.supports.ts_rng.present = 0; + } + ret |= tmp; + } return ret; } @@ -328,6 +384,8 @@ static int ts78xx_fpga_unload_devices(void) ts78xx_ts_rtc_unload(); if (ts78xx_fpga.supports.ts_nand.present == 1) ts78xx_ts_nand_unload(); + if (ts78xx_fpga.supports.ts_rng.present == 1) + ts78xx_ts_rng_unload(); return ret; } |