source: trunk/softs/tsar_boot/drivers/reset_sdc.c @ 924

Last change on this file since 924 was 758, checked in by cfuguet, 10 years ago

tsar_boot: improving configuration infrastructure

  • Using hard_config.h which respects the same sintax that the hard_config.h file of all TSAR platforms. This file can be then generated by the GIET-VM genmap tool or written manually.
  • All peripheral drivers have been moved to a drivers directory and they are compiled as a static library. This allows GCC to only include in the final .ELF the object files of used peripherals and not all of them.
  • Example hard_config.h and ldscripts have been introduced in the conf directory.
  • Improving comments in all files
File size: 2.9 KB
Line 
1/**
2 * \file   reset_sdc.c
3 * \author Cesar Fuguet
4 * \date   July 23, 2014
5 *
6 * \brief  Wrapper for the SD card and SPI drivers
7 */
8#include <reset_sdc.h>
9#include <reset_tty.h>
10#include <reset_utils.h>
11#include <defs.h>
12#include <sdcard.h>
13#include <spi.h>
14
15#ifndef SEG_IOC_BASE
16#   error "SEG_IOC_BASE constant must be defined in the hard_config.h file"
17#endif
18
19static struct sdcard_dev     _sdcard_device;
20static struct spi_dev *const _spi_device = (struct spi_dev*)SEG_IOC_BASE;
21
22static const int sdcard_reset_retries = 4;
23static const int spi_init_clkfreq     = 200000  ; /* Hz */
24static const int spi_func_clkfreq     = 10000000; /* Hz */
25
26int reset_sdc_init()
27{
28    unsigned char sdcard_rsp;
29
30    reset_puts("Initializing block device\n\r");
31
32    /**
33     * Initializing the SPI controller
34     */
35    spi_dev_config (
36      _spi_device            ,
37      spi_init_clkfreq       ,
38      RESET_SYSTEM_CLK * 1000,
39      8                      ,
40      SPI_TX_NEGEDGE         ,
41      SPI_RX_POSEDGE
42    );
43
44    /**
45     * Initializing the SD Card
46     */
47    unsigned int iter = 0;
48    while(1)
49    {
50        reset_puts("Trying to initialize SD card... ");
51
52        sdcard_rsp = sdcard_dev_open(&_sdcard_device, _spi_device, 0);
53        if (sdcard_rsp == 0)
54        {
55            reset_puts("OK\n");
56            break;
57        }
58
59        reset_puts("KO\n");
60        reset_sleep(1000);
61        if (++iter >= sdcard_reset_retries)
62        {
63            reset_puts("\nERROR: During SD card reset to IDLE state\n"
64                      "/ card response = ");
65            reset_putx(sdcard_rsp);
66            reset_puts("\n");
67            reset_exit();
68        }
69    }
70
71    /**
72     * Set the block length of the SD Card
73     */
74    sdcard_rsp = sdcard_dev_set_blocklen(&_sdcard_device, 512);
75    if (sdcard_rsp)
76    {
77        reset_puts("ERROR: During SD card blocklen initialization\n");
78        reset_exit();
79    }
80
81    /**
82     * Incrementing SDCARD clock frequency for normal function
83     */
84    spi_dev_config (
85        _spi_device            ,
86        spi_func_clkfreq       ,
87        RESET_SYSTEM_CLK * 1000,
88        -1                     ,
89        -1                     ,
90        -1
91    );
92
93    reset_puts("Finish block device initialization\n\r");
94
95    return 0;
96} /* end reset_spi_init() */
97
98int reset_sdc_read( unsigned int lba, void* buffer, unsigned int count )
99{
100    unsigned int sdcard_rsp;
101    unsigned int i;
102
103    sdcard_dev_lseek(&_sdcard_device, lba);
104    for(i = 0; i < count; i++)
105    {
106        unsigned char* buf = (unsigned char *) buffer + (512 * i);
107        if (( sdcard_rsp = sdcard_dev_read ( &_sdcard_device, buf, 512 ) ))
108        {
109            reset_puts("ERROR during read on the SDCARD device. Code: ");
110            reset_putx(sdcard_rsp);
111            reset_puts("\n");
112            return 1;
113        }
114    }
115    return 0;
116}
117
118/*
119 * vim: tabstop=4 : softtabstop=4 : shiftwidth=4 : expandtab
120 */
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