From d20185ac96c4b50ed4de7098a101a31f2b140b82 Mon Sep 17 00:00:00 2001
From: Cástor Muñoz <cmvidal@gmail.com>
Date: Tue, 9 Dec 2014 19:38:47 +0100
Subject: iPod Classic: reads HDD S.M.A.R.T. data

Adds ata_read_smart() function to storage ATA driver, current
SMART data can be displayed and optionally written to hard
disk using System->Debug menu.

Change-Id: Ie8817bb311d5d956df2f0fbfaf554e2d53e89a93
---
 firmware/export/ata.h | 106 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)

(limited to 'firmware/export/ata.h')

diff --git a/firmware/export/ata.h b/firmware/export/ata.h
index 0bcb144e63..6f0d0b699f 100644
--- a/firmware/export/ata.h
+++ b/firmware/export/ata.h
@@ -25,6 +25,107 @@
 #include "config.h" /* for HAVE_MULTIVOLUME or not */
 #include "mv.h" /* for IF_MV() and friends */
 
+#ifdef HAVE_ATA_SMART
+/* S.M.A.R.T. headers from smartmontools-5.42 */
+#define NUMBER_ATA_SMART_ATTRIBUTES     30
+
+struct ata_smart_attribute {
+  unsigned char id;
+  /* meaning of flag bits: see MACROS just below */
+  /* WARNING: MISALIGNED! */
+  unsigned short flags;
+  unsigned char current;
+  unsigned char worst;
+  unsigned char raw[6];
+  unsigned char reserv;
+} __attribute__((packed));
+
+/* MACROS to interpret the flags bits in the previous structure. */
+/* These have not been implemented using bitflags and a union, to make */
+/* it portable across bit/little endian and different platforms. */
+
+/* 0: Prefailure bit */
+
+/* From SFF 8035i Revision 2 page 19: Bit 0 (pre-failure/advisory bit) */
+/* - If the value of this bit equals zero, an attribute value less */
+/* than or equal to its corresponding attribute threshold indicates an */
+/* advisory condition where the usage or age of the device has */
+/* exceeded its intended design life period. If the value of this bit */
+/* equals one, an attribute value less than or equal to its */
+/* corresponding attribute threshold indicates a prefailure condition */
+/* where imminent loss of data is being predicted. */
+#define ATTRIBUTE_FLAGS_PREFAILURE(x) (x & 0x01)
+
+/* 1: Online bit  */
+
+/* From SFF 8035i Revision 2 page 19: Bit 1 (on-line data collection */
+/* bit) - If the value of this bit equals zero, then the attribute */
+/* value is updated only during off-line data collection */
+/* activities. If the value of this bit equals one, then the attribute */
+/* value is updated during normal operation of the device or during */
+/* both normal operation and off-line testing. */
+#define ATTRIBUTE_FLAGS_ONLINE(x) (x & 0x02)
+
+/* The following are (probably) IBM's, Maxtors and  Quantum's definitions for the */
+/* vendor-specific bits: */
+/* 2: Performance type bit */
+#define ATTRIBUTE_FLAGS_PERFORMANCE(x) (x & 0x04)
+
+/* 3: Errorrate type bit */
+#define ATTRIBUTE_FLAGS_ERRORRATE(x) (x & 0x08)
+
+/* 4: Eventcount bit */
+#define ATTRIBUTE_FLAGS_EVENTCOUNT(x) (x & 0x10)
+
+/* 5: Selfpereserving bit */
+#define ATTRIBUTE_FLAGS_SELFPRESERVING(x) (x & 0x20)
+
+/* 6-15: Reserved for future use */
+#define ATTRIBUTE_FLAGS_OTHER(x) ((x) & 0xffc0)
+
+struct ata_smart_values
+{
+    unsigned short int revnumber;
+    struct ata_smart_attribute vendor_attributes [NUMBER_ATA_SMART_ATTRIBUTES];
+    unsigned char offline_data_collection_status;
+    unsigned char self_test_exec_status;
+    unsigned short int total_time_to_complete_off_line;
+    unsigned char vendor_specific_366;
+    unsigned char offline_data_collection_capability;
+    unsigned short int smart_capability;
+    unsigned char errorlog_capability;
+    unsigned char vendor_specific_371;
+    unsigned char short_test_completion_time;
+    unsigned char extend_test_completion_time;
+    unsigned char conveyance_test_completion_time;
+    unsigned char reserved_375_385[11];
+    unsigned char vendor_specific_386_510[125];
+    unsigned char chksum;
+} __attribute__((packed));
+
+/* Raw attribute value print formats */
+enum ata_attr_raw_format
+{
+    RAWFMT_DEFAULT,
+    RAWFMT_RAW8,
+    RAWFMT_RAW16,
+    RAWFMT_RAW48,
+    RAWFMT_HEX48,
+    RAWFMT_RAW64,
+    RAWFMT_HEX64,
+    RAWFMT_RAW16_OPT_RAW16,
+    RAWFMT_RAW16_OPT_AVG16,
+    RAWFMT_RAW24_DIV_RAW24,
+    RAWFMT_RAW24_DIV_RAW32,
+    RAWFMT_SEC2HOUR,
+    RAWFMT_MIN2HOUR,
+    RAWFMT_HALFMIN2HOUR,
+    RAWFMT_MSEC24_HOUR32,
+    RAWFMT_TEMPMINMAX,
+    RAWFMT_TEMP10X,
+};
+#endif /* HAVE_ATA_SMART */
+
 struct storage_info;
 
 void ata_enable(bool on);
@@ -69,4 +170,9 @@ int ata_spinup_time(void); /* ticks */
 int ata_get_dma_mode(void);
 #endif /* HAVE_ATA_DMA */
 
+#ifdef HAVE_ATA_SMART
+/* Returns current S.M.A.R.T. data */
+void* ata_read_smart(void);
+#endif
+
 #endif /* __ATA_H__ */
-- 
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