4.104.115
Last change
on this file since ac7af4a was
1f18710,
checked in by Philippe Simons <loki_666@…>, on 07/07/05 at 21:20:38
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2005-07-07 Philippe Simons <loki_666@…>
- Makefile.am: Remove s3c2400/lcd/lcd.c
- s3c2400/lcd/lcd.c: Remove.
- s3c2400/clock/support.c: file "rewrote" to avoid GPL.
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-
Property mode set to
100644
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File size:
1.2 KB
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1 | #include <rtems.h> |
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2 | #include <bsp.h> |
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3 | #include <s3c2400.h> |
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4 | |
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5 | /* ------------------------------------------------------------------------- */ |
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6 | /* NOTE: This describes the proper use of this file. |
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7 | * |
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8 | * BSP_OSC_FREQ should be defined as the input frequency of the PLL. |
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9 | * |
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10 | * get_FCLK(), get_HCLK(), get_PCLK() and get_UCLK() return the clock of |
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11 | * the specified bus in HZ. |
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12 | */ |
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13 | /* ------------------------------------------------------------------------- */ |
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14 | |
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15 | /* return FCLK frequency */ |
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16 | uint32_t get_FCLK(void) |
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17 | { |
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18 | uint32_t r, m, p, s; |
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19 | |
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20 | r = rMPLLCON; |
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21 | m = ((r & 0xFF000) >> 12) + 8; |
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22 | p = ((r & 0x003F0) >> 4) + 2; |
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23 | s = r & 0x3; |
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24 | |
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25 | return((BSP_OSC_FREQ * m) / (p << s)); |
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26 | } |
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27 | |
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28 | /* return UCLK frequency */ |
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29 | uint32_t get_UCLK(void) |
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30 | { |
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31 | uint32_t r, m, p, s; |
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32 | |
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33 | r = rUPLLCON; |
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34 | m = ((r & 0xFF000) >> 12) + 8; |
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35 | p = ((r & 0x003F0) >> 4) + 2; |
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36 | s = r & 0x3; |
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37 | |
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38 | return((BSP_OSC_FREQ * m) / (p << s)); |
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39 | } |
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40 | |
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41 | /* return HCLK frequency */ |
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42 | uint32_t get_HCLK(void) |
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43 | { |
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44 | if (rCLKDIVN & 0x2) |
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45 | return get_FCLK()/2; |
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46 | else |
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47 | return get_FCLK(); |
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48 | } |
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49 | |
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50 | /* return PCLK frequency */ |
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51 | uint32_t get_PCLK(void) |
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52 | { |
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53 | if (rCLKDIVN & 0x1) |
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54 | return get_HCLK()/2; |
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55 | else |
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56 | return get_HCLK(); |
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57 | } |
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